| 1 | /* Everything about breakpoints, for GDB. |
| 2 | |
| 3 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
| 5 | 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "arch-utils.h" |
| 24 | #include <ctype.h> |
| 25 | #include "hashtab.h" |
| 26 | #include "symtab.h" |
| 27 | #include "frame.h" |
| 28 | #include "breakpoint.h" |
| 29 | #include "tracepoint.h" |
| 30 | #include "gdbtypes.h" |
| 31 | #include "expression.h" |
| 32 | #include "gdbcore.h" |
| 33 | #include "gdbcmd.h" |
| 34 | #include "value.h" |
| 35 | #include "command.h" |
| 36 | #include "inferior.h" |
| 37 | #include "gdbthread.h" |
| 38 | #include "target.h" |
| 39 | #include "language.h" |
| 40 | #include "gdb_string.h" |
| 41 | #include "demangle.h" |
| 42 | #include "filenames.h" |
| 43 | #include "annotate.h" |
| 44 | #include "symfile.h" |
| 45 | #include "objfiles.h" |
| 46 | #include "source.h" |
| 47 | #include "linespec.h" |
| 48 | #include "completer.h" |
| 49 | #include "gdb.h" |
| 50 | #include "ui-out.h" |
| 51 | #include "cli/cli-script.h" |
| 52 | #include "gdb_assert.h" |
| 53 | #include "block.h" |
| 54 | #include "solib.h" |
| 55 | #include "solist.h" |
| 56 | #include "observer.h" |
| 57 | #include "exceptions.h" |
| 58 | #include "memattr.h" |
| 59 | #include "ada-lang.h" |
| 60 | #include "top.h" |
| 61 | #include "wrapper.h" |
| 62 | #include "valprint.h" |
| 63 | #include "jit.h" |
| 64 | #include "xml-syscall.h" |
| 65 | #include "parser-defs.h" |
| 66 | #include "cli/cli-utils.h" |
| 67 | #include "continuations.h" |
| 68 | |
| 69 | /* readline include files */ |
| 70 | #include "readline/readline.h" |
| 71 | #include "readline/history.h" |
| 72 | |
| 73 | /* readline defines this. */ |
| 74 | #undef savestring |
| 75 | |
| 76 | #include "mi/mi-common.h" |
| 77 | #include "python/python.h" |
| 78 | |
| 79 | /* Arguments to pass as context to some catch command handlers. */ |
| 80 | #define CATCH_PERMANENT ((void *) (uintptr_t) 0) |
| 81 | #define CATCH_TEMPORARY ((void *) (uintptr_t) 1) |
| 82 | |
| 83 | /* Prototypes for local functions. */ |
| 84 | |
| 85 | static void enable_delete_command (char *, int); |
| 86 | |
| 87 | static void enable_once_command (char *, int); |
| 88 | |
| 89 | static void disable_command (char *, int); |
| 90 | |
| 91 | static void enable_command (char *, int); |
| 92 | |
| 93 | static void map_breakpoint_numbers (char *, void (*) (struct breakpoint *, |
| 94 | void *), |
| 95 | void *); |
| 96 | |
| 97 | static void ignore_command (char *, int); |
| 98 | |
| 99 | static int breakpoint_re_set_one (void *); |
| 100 | |
| 101 | static void clear_command (char *, int); |
| 102 | |
| 103 | static void catch_command (char *, int); |
| 104 | |
| 105 | static int can_use_hardware_watchpoint (struct value *); |
| 106 | |
| 107 | static void break_command_1 (char *, int, int); |
| 108 | |
| 109 | static void mention (struct breakpoint *); |
| 110 | |
| 111 | /* This function is used in gdbtk sources and thus can not be made |
| 112 | static. */ |
| 113 | struct breakpoint *set_raw_breakpoint (struct gdbarch *gdbarch, |
| 114 | struct symtab_and_line, |
| 115 | enum bptype); |
| 116 | |
| 117 | static void breakpoint_adjustment_warning (CORE_ADDR, CORE_ADDR, int, int); |
| 118 | |
| 119 | static CORE_ADDR adjust_breakpoint_address (struct gdbarch *gdbarch, |
| 120 | CORE_ADDR bpaddr, |
| 121 | enum bptype bptype); |
| 122 | |
| 123 | static void describe_other_breakpoints (struct gdbarch *, |
| 124 | struct program_space *, CORE_ADDR, |
| 125 | struct obj_section *, int); |
| 126 | |
| 127 | static int breakpoint_address_match (struct address_space *aspace1, |
| 128 | CORE_ADDR addr1, |
| 129 | struct address_space *aspace2, |
| 130 | CORE_ADDR addr2); |
| 131 | |
| 132 | static int watchpoint_locations_match (struct bp_location *loc1, |
| 133 | struct bp_location *loc2); |
| 134 | |
| 135 | static int breakpoint_location_address_match (struct bp_location *bl, |
| 136 | struct address_space *aspace, |
| 137 | CORE_ADDR addr); |
| 138 | |
| 139 | static void breakpoints_info (char *, int); |
| 140 | |
| 141 | static void watchpoints_info (char *, int); |
| 142 | |
| 143 | static int breakpoint_1 (char *, int, |
| 144 | int (*) (const struct breakpoint *)); |
| 145 | |
| 146 | static int breakpoint_cond_eval (void *); |
| 147 | |
| 148 | static void cleanup_executing_breakpoints (void *); |
| 149 | |
| 150 | static void commands_command (char *, int); |
| 151 | |
| 152 | static void condition_command (char *, int); |
| 153 | |
| 154 | typedef enum |
| 155 | { |
| 156 | mark_inserted, |
| 157 | mark_uninserted |
| 158 | } |
| 159 | insertion_state_t; |
| 160 | |
| 161 | static int remove_breakpoint (struct bp_location *, insertion_state_t); |
| 162 | static int remove_breakpoint_1 (struct bp_location *, insertion_state_t); |
| 163 | |
| 164 | static enum print_stop_action print_it_typical (bpstat); |
| 165 | |
| 166 | static enum print_stop_action print_bp_stop_message (bpstat bs); |
| 167 | |
| 168 | static int watchpoint_check (void *); |
| 169 | |
| 170 | static void maintenance_info_breakpoints (char *, int); |
| 171 | |
| 172 | static int hw_breakpoint_used_count (void); |
| 173 | |
| 174 | static int hw_watchpoint_used_count (enum bptype, int *); |
| 175 | |
| 176 | static void hbreak_command (char *, int); |
| 177 | |
| 178 | static void thbreak_command (char *, int); |
| 179 | |
| 180 | static void enable_breakpoint_disp (struct breakpoint *, enum bpdisp); |
| 181 | |
| 182 | static void stop_command (char *arg, int from_tty); |
| 183 | |
| 184 | static void stopin_command (char *arg, int from_tty); |
| 185 | |
| 186 | static void stopat_command (char *arg, int from_tty); |
| 187 | |
| 188 | static char *ep_parse_optional_if_clause (char **arg); |
| 189 | |
| 190 | static void catch_exception_command_1 (enum exception_event_kind ex_event, |
| 191 | char *arg, int tempflag, int from_tty); |
| 192 | |
| 193 | static void tcatch_command (char *arg, int from_tty); |
| 194 | |
| 195 | static void detach_single_step_breakpoints (void); |
| 196 | |
| 197 | static int single_step_breakpoint_inserted_here_p (struct address_space *, |
| 198 | CORE_ADDR pc); |
| 199 | |
| 200 | static void free_bp_location (struct bp_location *loc); |
| 201 | static void incref_bp_location (struct bp_location *loc); |
| 202 | static void decref_bp_location (struct bp_location **loc); |
| 203 | |
| 204 | static struct bp_location *allocate_bp_location (struct breakpoint *bpt); |
| 205 | |
| 206 | static void update_global_location_list (int); |
| 207 | |
| 208 | static void update_global_location_list_nothrow (int); |
| 209 | |
| 210 | static int is_hardware_watchpoint (const struct breakpoint *bpt); |
| 211 | |
| 212 | static int is_watchpoint (const struct breakpoint *bpt); |
| 213 | |
| 214 | static void insert_breakpoint_locations (void); |
| 215 | |
| 216 | static int syscall_catchpoint_p (struct breakpoint *b); |
| 217 | |
| 218 | static void tracepoints_info (char *, int); |
| 219 | |
| 220 | static void delete_trace_command (char *, int); |
| 221 | |
| 222 | static void enable_trace_command (char *, int); |
| 223 | |
| 224 | static void disable_trace_command (char *, int); |
| 225 | |
| 226 | static void trace_pass_command (char *, int); |
| 227 | |
| 228 | static int is_masked_watchpoint (const struct breakpoint *b); |
| 229 | |
| 230 | /* Assuming we're creating a static tracepoint, does S look like a |
| 231 | static tracepoint marker spec ("-m MARKER_ID")? */ |
| 232 | #define is_marker_spec(s) \ |
| 233 | (s != NULL && strncmp (s, "-m", 2) == 0 && ((s)[2] == ' ' || (s)[2] == '\t')) |
| 234 | |
| 235 | /* A reference-counted struct command_line. This lets multiple |
| 236 | breakpoints share a single command list. */ |
| 237 | struct counted_command_line |
| 238 | { |
| 239 | /* The reference count. */ |
| 240 | int refc; |
| 241 | |
| 242 | /* The command list. */ |
| 243 | struct command_line *commands; |
| 244 | }; |
| 245 | |
| 246 | struct command_line * |
| 247 | breakpoint_commands (struct breakpoint *b) |
| 248 | { |
| 249 | return b->commands ? b->commands->commands : NULL; |
| 250 | } |
| 251 | |
| 252 | /* Flag indicating that a command has proceeded the inferior past the |
| 253 | current breakpoint. */ |
| 254 | |
| 255 | static int breakpoint_proceeded; |
| 256 | |
| 257 | const char * |
| 258 | bpdisp_text (enum bpdisp disp) |
| 259 | { |
| 260 | /* NOTE: the following values are a part of MI protocol and |
| 261 | represent values of 'disp' field returned when inferior stops at |
| 262 | a breakpoint. */ |
| 263 | static const char * const bpdisps[] = {"del", "dstp", "dis", "keep"}; |
| 264 | |
| 265 | return bpdisps[(int) disp]; |
| 266 | } |
| 267 | |
| 268 | /* Prototypes for exported functions. */ |
| 269 | /* If FALSE, gdb will not use hardware support for watchpoints, even |
| 270 | if such is available. */ |
| 271 | static int can_use_hw_watchpoints; |
| 272 | |
| 273 | static void |
| 274 | show_can_use_hw_watchpoints (struct ui_file *file, int from_tty, |
| 275 | struct cmd_list_element *c, |
| 276 | const char *value) |
| 277 | { |
| 278 | fprintf_filtered (file, |
| 279 | _("Debugger's willingness to use " |
| 280 | "watchpoint hardware is %s.\n"), |
| 281 | value); |
| 282 | } |
| 283 | |
| 284 | /* If AUTO_BOOLEAN_FALSE, gdb will not attempt to create pending breakpoints. |
| 285 | If AUTO_BOOLEAN_TRUE, gdb will automatically create pending breakpoints |
| 286 | for unrecognized breakpoint locations. |
| 287 | If AUTO_BOOLEAN_AUTO, gdb will query when breakpoints are unrecognized. */ |
| 288 | static enum auto_boolean pending_break_support; |
| 289 | static void |
| 290 | show_pending_break_support (struct ui_file *file, int from_tty, |
| 291 | struct cmd_list_element *c, |
| 292 | const char *value) |
| 293 | { |
| 294 | fprintf_filtered (file, |
| 295 | _("Debugger's behavior regarding " |
| 296 | "pending breakpoints is %s.\n"), |
| 297 | value); |
| 298 | } |
| 299 | |
| 300 | /* If 1, gdb will automatically use hardware breakpoints for breakpoints |
| 301 | set with "break" but falling in read-only memory. |
| 302 | If 0, gdb will warn about such breakpoints, but won't automatically |
| 303 | use hardware breakpoints. */ |
| 304 | static int automatic_hardware_breakpoints; |
| 305 | static void |
| 306 | show_automatic_hardware_breakpoints (struct ui_file *file, int from_tty, |
| 307 | struct cmd_list_element *c, |
| 308 | const char *value) |
| 309 | { |
| 310 | fprintf_filtered (file, |
| 311 | _("Automatic usage of hardware breakpoints is %s.\n"), |
| 312 | value); |
| 313 | } |
| 314 | |
| 315 | /* If on, gdb will keep breakpoints inserted even as inferior is |
| 316 | stopped, and immediately insert any new breakpoints. If off, gdb |
| 317 | will insert breakpoints into inferior only when resuming it, and |
| 318 | will remove breakpoints upon stop. If auto, GDB will behave as ON |
| 319 | if in non-stop mode, and as OFF if all-stop mode.*/ |
| 320 | |
| 321 | static const char always_inserted_auto[] = "auto"; |
| 322 | static const char always_inserted_on[] = "on"; |
| 323 | static const char always_inserted_off[] = "off"; |
| 324 | static const char *always_inserted_enums[] = { |
| 325 | always_inserted_auto, |
| 326 | always_inserted_off, |
| 327 | always_inserted_on, |
| 328 | NULL |
| 329 | }; |
| 330 | static const char *always_inserted_mode = always_inserted_auto; |
| 331 | static void |
| 332 | show_always_inserted_mode (struct ui_file *file, int from_tty, |
| 333 | struct cmd_list_element *c, const char *value) |
| 334 | { |
| 335 | if (always_inserted_mode == always_inserted_auto) |
| 336 | fprintf_filtered (file, |
| 337 | _("Always inserted breakpoint " |
| 338 | "mode is %s (currently %s).\n"), |
| 339 | value, |
| 340 | breakpoints_always_inserted_mode () ? "on" : "off"); |
| 341 | else |
| 342 | fprintf_filtered (file, _("Always inserted breakpoint mode is %s.\n"), |
| 343 | value); |
| 344 | } |
| 345 | |
| 346 | int |
| 347 | breakpoints_always_inserted_mode (void) |
| 348 | { |
| 349 | return (always_inserted_mode == always_inserted_on |
| 350 | || (always_inserted_mode == always_inserted_auto && non_stop)); |
| 351 | } |
| 352 | |
| 353 | void _initialize_breakpoint (void); |
| 354 | |
| 355 | /* Are we executing breakpoint commands? */ |
| 356 | static int executing_breakpoint_commands; |
| 357 | |
| 358 | /* Are overlay event breakpoints enabled? */ |
| 359 | static int overlay_events_enabled; |
| 360 | |
| 361 | /* See description in breakpoint.h. */ |
| 362 | int target_exact_watchpoints = 0; |
| 363 | |
| 364 | /* Walk the following statement or block through all breakpoints. |
| 365 | ALL_BREAKPOINTS_SAFE does so even if the statment deletes the |
| 366 | current breakpoint. */ |
| 367 | |
| 368 | #define ALL_BREAKPOINTS(B) for (B = breakpoint_chain; B; B = B->next) |
| 369 | |
| 370 | #define ALL_BREAKPOINTS_SAFE(B,TMP) \ |
| 371 | for (B = breakpoint_chain; \ |
| 372 | B ? (TMP=B->next, 1): 0; \ |
| 373 | B = TMP) |
| 374 | |
| 375 | /* Similar iterator for the low-level breakpoints. SAFE variant is |
| 376 | not provided so update_global_location_list must not be called |
| 377 | while executing the block of ALL_BP_LOCATIONS. */ |
| 378 | |
| 379 | #define ALL_BP_LOCATIONS(B,BP_TMP) \ |
| 380 | for (BP_TMP = bp_location; \ |
| 381 | BP_TMP < bp_location + bp_location_count && (B = *BP_TMP); \ |
| 382 | BP_TMP++) |
| 383 | |
| 384 | /* Iterator for tracepoints only. */ |
| 385 | |
| 386 | #define ALL_TRACEPOINTS(B) \ |
| 387 | for (B = breakpoint_chain; B; B = B->next) \ |
| 388 | if (is_tracepoint (B)) |
| 389 | |
| 390 | /* Chains of all breakpoints defined. */ |
| 391 | |
| 392 | struct breakpoint *breakpoint_chain; |
| 393 | |
| 394 | /* Array is sorted by bp_location_compare - primarily by the ADDRESS. */ |
| 395 | |
| 396 | static struct bp_location **bp_location; |
| 397 | |
| 398 | /* Number of elements of BP_LOCATION. */ |
| 399 | |
| 400 | static unsigned bp_location_count; |
| 401 | |
| 402 | /* Maximum alignment offset between bp_target_info.PLACED_ADDRESS and |
| 403 | ADDRESS for the current elements of BP_LOCATION which get a valid |
| 404 | result from bp_location_has_shadow. You can use it for roughly |
| 405 | limiting the subrange of BP_LOCATION to scan for shadow bytes for |
| 406 | an address you need to read. */ |
| 407 | |
| 408 | static CORE_ADDR bp_location_placed_address_before_address_max; |
| 409 | |
| 410 | /* Maximum offset plus alignment between bp_target_info.PLACED_ADDRESS |
| 411 | + bp_target_info.SHADOW_LEN and ADDRESS for the current elements of |
| 412 | BP_LOCATION which get a valid result from bp_location_has_shadow. |
| 413 | You can use it for roughly limiting the subrange of BP_LOCATION to |
| 414 | scan for shadow bytes for an address you need to read. */ |
| 415 | |
| 416 | static CORE_ADDR bp_location_shadow_len_after_address_max; |
| 417 | |
| 418 | /* The locations that no longer correspond to any breakpoint, unlinked |
| 419 | from bp_location array, but for which a hit may still be reported |
| 420 | by a target. */ |
| 421 | VEC(bp_location_p) *moribund_locations = NULL; |
| 422 | |
| 423 | /* Number of last breakpoint made. */ |
| 424 | |
| 425 | static int breakpoint_count; |
| 426 | |
| 427 | /* The value of `breakpoint_count' before the last command that |
| 428 | created breakpoints. If the last (break-like) command created more |
| 429 | than one breakpoint, then the difference between BREAKPOINT_COUNT |
| 430 | and PREV_BREAKPOINT_COUNT is more than one. */ |
| 431 | static int prev_breakpoint_count; |
| 432 | |
| 433 | /* Number of last tracepoint made. */ |
| 434 | |
| 435 | static int tracepoint_count; |
| 436 | |
| 437 | static struct cmd_list_element *breakpoint_set_cmdlist; |
| 438 | static struct cmd_list_element *breakpoint_show_cmdlist; |
| 439 | struct cmd_list_element *save_cmdlist; |
| 440 | |
| 441 | /* Return whether a breakpoint is an active enabled breakpoint. */ |
| 442 | static int |
| 443 | breakpoint_enabled (struct breakpoint *b) |
| 444 | { |
| 445 | return (b->enable_state == bp_enabled); |
| 446 | } |
| 447 | |
| 448 | /* Set breakpoint count to NUM. */ |
| 449 | |
| 450 | static void |
| 451 | set_breakpoint_count (int num) |
| 452 | { |
| 453 | prev_breakpoint_count = breakpoint_count; |
| 454 | breakpoint_count = num; |
| 455 | set_internalvar_integer (lookup_internalvar ("bpnum"), num); |
| 456 | } |
| 457 | |
| 458 | /* Used by `start_rbreak_breakpoints' below, to record the current |
| 459 | breakpoint count before "rbreak" creates any breakpoint. */ |
| 460 | static int rbreak_start_breakpoint_count; |
| 461 | |
| 462 | /* Called at the start an "rbreak" command to record the first |
| 463 | breakpoint made. */ |
| 464 | |
| 465 | void |
| 466 | start_rbreak_breakpoints (void) |
| 467 | { |
| 468 | rbreak_start_breakpoint_count = breakpoint_count; |
| 469 | } |
| 470 | |
| 471 | /* Called at the end of an "rbreak" command to record the last |
| 472 | breakpoint made. */ |
| 473 | |
| 474 | void |
| 475 | end_rbreak_breakpoints (void) |
| 476 | { |
| 477 | prev_breakpoint_count = rbreak_start_breakpoint_count; |
| 478 | } |
| 479 | |
| 480 | /* Used in run_command to zero the hit count when a new run starts. */ |
| 481 | |
| 482 | void |
| 483 | clear_breakpoint_hit_counts (void) |
| 484 | { |
| 485 | struct breakpoint *b; |
| 486 | |
| 487 | ALL_BREAKPOINTS (b) |
| 488 | b->hit_count = 0; |
| 489 | } |
| 490 | |
| 491 | /* Allocate a new counted_command_line with reference count of 1. |
| 492 | The new structure owns COMMANDS. */ |
| 493 | |
| 494 | static struct counted_command_line * |
| 495 | alloc_counted_command_line (struct command_line *commands) |
| 496 | { |
| 497 | struct counted_command_line *result |
| 498 | = xmalloc (sizeof (struct counted_command_line)); |
| 499 | |
| 500 | result->refc = 1; |
| 501 | result->commands = commands; |
| 502 | return result; |
| 503 | } |
| 504 | |
| 505 | /* Increment reference count. This does nothing if CMD is NULL. */ |
| 506 | |
| 507 | static void |
| 508 | incref_counted_command_line (struct counted_command_line *cmd) |
| 509 | { |
| 510 | if (cmd) |
| 511 | ++cmd->refc; |
| 512 | } |
| 513 | |
| 514 | /* Decrement reference count. If the reference count reaches 0, |
| 515 | destroy the counted_command_line. Sets *CMDP to NULL. This does |
| 516 | nothing if *CMDP is NULL. */ |
| 517 | |
| 518 | static void |
| 519 | decref_counted_command_line (struct counted_command_line **cmdp) |
| 520 | { |
| 521 | if (*cmdp) |
| 522 | { |
| 523 | if (--(*cmdp)->refc == 0) |
| 524 | { |
| 525 | free_command_lines (&(*cmdp)->commands); |
| 526 | xfree (*cmdp); |
| 527 | } |
| 528 | *cmdp = NULL; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /* A cleanup function that calls decref_counted_command_line. */ |
| 533 | |
| 534 | static void |
| 535 | do_cleanup_counted_command_line (void *arg) |
| 536 | { |
| 537 | decref_counted_command_line (arg); |
| 538 | } |
| 539 | |
| 540 | /* Create a cleanup that calls decref_counted_command_line on the |
| 541 | argument. */ |
| 542 | |
| 543 | static struct cleanup * |
| 544 | make_cleanup_decref_counted_command_line (struct counted_command_line **cmdp) |
| 545 | { |
| 546 | return make_cleanup (do_cleanup_counted_command_line, cmdp); |
| 547 | } |
| 548 | |
| 549 | /* Default address, symtab and line to put a breakpoint at |
| 550 | for "break" command with no arg. |
| 551 | If default_breakpoint_valid is zero, the other three are |
| 552 | not valid, and "break" with no arg is an error. |
| 553 | |
| 554 | This set by print_stack_frame, which calls set_default_breakpoint. */ |
| 555 | |
| 556 | int default_breakpoint_valid; |
| 557 | CORE_ADDR default_breakpoint_address; |
| 558 | struct symtab *default_breakpoint_symtab; |
| 559 | int default_breakpoint_line; |
| 560 | struct program_space *default_breakpoint_pspace; |
| 561 | |
| 562 | \f |
| 563 | /* Return the breakpoint with the specified number, or NULL |
| 564 | if the number does not refer to an existing breakpoint. */ |
| 565 | |
| 566 | struct breakpoint * |
| 567 | get_breakpoint (int num) |
| 568 | { |
| 569 | struct breakpoint *b; |
| 570 | |
| 571 | ALL_BREAKPOINTS (b) |
| 572 | if (b->number == num) |
| 573 | return b; |
| 574 | |
| 575 | return NULL; |
| 576 | } |
| 577 | |
| 578 | \f |
| 579 | |
| 580 | void |
| 581 | set_breakpoint_condition (struct breakpoint *b, char *exp, |
| 582 | int from_tty) |
| 583 | { |
| 584 | struct bp_location *loc = b->loc; |
| 585 | |
| 586 | for (; loc; loc = loc->next) |
| 587 | { |
| 588 | xfree (loc->cond); |
| 589 | loc->cond = NULL; |
| 590 | } |
| 591 | xfree (b->cond_string); |
| 592 | b->cond_string = NULL; |
| 593 | xfree (b->cond_exp); |
| 594 | b->cond_exp = NULL; |
| 595 | |
| 596 | if (*exp == 0) |
| 597 | { |
| 598 | if (from_tty) |
| 599 | printf_filtered (_("Breakpoint %d now unconditional.\n"), b->number); |
| 600 | } |
| 601 | else |
| 602 | { |
| 603 | char *arg = exp; |
| 604 | |
| 605 | /* I don't know if it matters whether this is the string the user |
| 606 | typed in or the decompiled expression. */ |
| 607 | b->cond_string = xstrdup (arg); |
| 608 | b->condition_not_parsed = 0; |
| 609 | |
| 610 | if (is_watchpoint (b)) |
| 611 | { |
| 612 | innermost_block = NULL; |
| 613 | arg = exp; |
| 614 | b->cond_exp = parse_exp_1 (&arg, 0, 0); |
| 615 | if (*arg) |
| 616 | error (_("Junk at end of expression")); |
| 617 | b->cond_exp_valid_block = innermost_block; |
| 618 | } |
| 619 | else |
| 620 | { |
| 621 | for (loc = b->loc; loc; loc = loc->next) |
| 622 | { |
| 623 | arg = exp; |
| 624 | loc->cond = |
| 625 | parse_exp_1 (&arg, block_for_pc (loc->address), 0); |
| 626 | if (*arg) |
| 627 | error (_("Junk at end of expression")); |
| 628 | } |
| 629 | } |
| 630 | } |
| 631 | breakpoints_changed (); |
| 632 | observer_notify_breakpoint_modified (b); |
| 633 | } |
| 634 | |
| 635 | /* condition N EXP -- set break condition of breakpoint N to EXP. */ |
| 636 | |
| 637 | static void |
| 638 | condition_command (char *arg, int from_tty) |
| 639 | { |
| 640 | struct breakpoint *b; |
| 641 | char *p; |
| 642 | int bnum; |
| 643 | |
| 644 | if (arg == 0) |
| 645 | error_no_arg (_("breakpoint number")); |
| 646 | |
| 647 | p = arg; |
| 648 | bnum = get_number (&p); |
| 649 | if (bnum == 0) |
| 650 | error (_("Bad breakpoint argument: '%s'"), arg); |
| 651 | |
| 652 | ALL_BREAKPOINTS (b) |
| 653 | if (b->number == bnum) |
| 654 | { |
| 655 | /* Check if this breakpoint has a Python object assigned to |
| 656 | it, and if it has a definition of the "stop" |
| 657 | method. This method and conditions entered into GDB from |
| 658 | the CLI are mutually exclusive. */ |
| 659 | if (b->py_bp_object |
| 660 | && gdbpy_breakpoint_has_py_cond (b->py_bp_object)) |
| 661 | error (_("Cannot set a condition where a Python 'stop' " |
| 662 | "method has been defined in the breakpoint.")); |
| 663 | set_breakpoint_condition (b, p, from_tty); |
| 664 | return; |
| 665 | } |
| 666 | |
| 667 | error (_("No breakpoint number %d."), bnum); |
| 668 | } |
| 669 | |
| 670 | /* Check that COMMAND do not contain commands that are suitable |
| 671 | only for tracepoints and not suitable for ordinary breakpoints. |
| 672 | Throw if any such commands is found. */ |
| 673 | |
| 674 | static void |
| 675 | check_no_tracepoint_commands (struct command_line *commands) |
| 676 | { |
| 677 | struct command_line *c; |
| 678 | |
| 679 | for (c = commands; c; c = c->next) |
| 680 | { |
| 681 | int i; |
| 682 | |
| 683 | if (c->control_type == while_stepping_control) |
| 684 | error (_("The 'while-stepping' command can " |
| 685 | "only be used for tracepoints")); |
| 686 | |
| 687 | for (i = 0; i < c->body_count; ++i) |
| 688 | check_no_tracepoint_commands ((c->body_list)[i]); |
| 689 | |
| 690 | /* Not that command parsing removes leading whitespace and comment |
| 691 | lines and also empty lines. So, we only need to check for |
| 692 | command directly. */ |
| 693 | if (strstr (c->line, "collect ") == c->line) |
| 694 | error (_("The 'collect' command can only be used for tracepoints")); |
| 695 | |
| 696 | if (strstr (c->line, "teval ") == c->line) |
| 697 | error (_("The 'teval' command can only be used for tracepoints")); |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | /* Encapsulate tests for different types of tracepoints. */ |
| 702 | |
| 703 | int |
| 704 | is_tracepoint (const struct breakpoint *b) |
| 705 | { |
| 706 | return (b->type == bp_tracepoint |
| 707 | || b->type == bp_fast_tracepoint |
| 708 | || b->type == bp_static_tracepoint); |
| 709 | } |
| 710 | |
| 711 | /* A helper function that validsates that COMMANDS are valid for a |
| 712 | breakpoint. This function will throw an exception if a problem is |
| 713 | found. */ |
| 714 | |
| 715 | static void |
| 716 | validate_commands_for_breakpoint (struct breakpoint *b, |
| 717 | struct command_line *commands) |
| 718 | { |
| 719 | if (is_tracepoint (b)) |
| 720 | { |
| 721 | /* We need to verify that each top-level element of commands is |
| 722 | valid for tracepoints, that there's at most one |
| 723 | while-stepping element, and that while-stepping's body has |
| 724 | valid tracing commands excluding nested while-stepping. */ |
| 725 | struct command_line *c; |
| 726 | struct command_line *while_stepping = 0; |
| 727 | for (c = commands; c; c = c->next) |
| 728 | { |
| 729 | if (c->control_type == while_stepping_control) |
| 730 | { |
| 731 | if (b->type == bp_fast_tracepoint) |
| 732 | error (_("The 'while-stepping' command " |
| 733 | "cannot be used for fast tracepoint")); |
| 734 | else if (b->type == bp_static_tracepoint) |
| 735 | error (_("The 'while-stepping' command " |
| 736 | "cannot be used for static tracepoint")); |
| 737 | |
| 738 | if (while_stepping) |
| 739 | error (_("The 'while-stepping' command " |
| 740 | "can be used only once")); |
| 741 | else |
| 742 | while_stepping = c; |
| 743 | } |
| 744 | } |
| 745 | if (while_stepping) |
| 746 | { |
| 747 | struct command_line *c2; |
| 748 | |
| 749 | gdb_assert (while_stepping->body_count == 1); |
| 750 | c2 = while_stepping->body_list[0]; |
| 751 | for (; c2; c2 = c2->next) |
| 752 | { |
| 753 | if (c2->control_type == while_stepping_control) |
| 754 | error (_("The 'while-stepping' command cannot be nested")); |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | else |
| 759 | { |
| 760 | check_no_tracepoint_commands (commands); |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | /* Return a vector of all the static tracepoints set at ADDR. The |
| 765 | caller is responsible for releasing the vector. */ |
| 766 | |
| 767 | VEC(breakpoint_p) * |
| 768 | static_tracepoints_here (CORE_ADDR addr) |
| 769 | { |
| 770 | struct breakpoint *b; |
| 771 | VEC(breakpoint_p) *found = 0; |
| 772 | struct bp_location *loc; |
| 773 | |
| 774 | ALL_BREAKPOINTS (b) |
| 775 | if (b->type == bp_static_tracepoint) |
| 776 | { |
| 777 | for (loc = b->loc; loc; loc = loc->next) |
| 778 | if (loc->address == addr) |
| 779 | VEC_safe_push(breakpoint_p, found, b); |
| 780 | } |
| 781 | |
| 782 | return found; |
| 783 | } |
| 784 | |
| 785 | /* Set the command list of B to COMMANDS. If breakpoint is tracepoint, |
| 786 | validate that only allowed commands are included. */ |
| 787 | |
| 788 | void |
| 789 | breakpoint_set_commands (struct breakpoint *b, |
| 790 | struct command_line *commands) |
| 791 | { |
| 792 | validate_commands_for_breakpoint (b, commands); |
| 793 | |
| 794 | decref_counted_command_line (&b->commands); |
| 795 | b->commands = alloc_counted_command_line (commands); |
| 796 | breakpoints_changed (); |
| 797 | observer_notify_breakpoint_modified (b); |
| 798 | } |
| 799 | |
| 800 | /* Set the internal `silent' flag on the breakpoint. Note that this |
| 801 | is not the same as the "silent" that may appear in the breakpoint's |
| 802 | commands. */ |
| 803 | |
| 804 | void |
| 805 | breakpoint_set_silent (struct breakpoint *b, int silent) |
| 806 | { |
| 807 | int old_silent = b->silent; |
| 808 | |
| 809 | b->silent = silent; |
| 810 | if (old_silent != silent) |
| 811 | observer_notify_breakpoint_modified (b); |
| 812 | } |
| 813 | |
| 814 | /* Set the thread for this breakpoint. If THREAD is -1, make the |
| 815 | breakpoint work for any thread. */ |
| 816 | |
| 817 | void |
| 818 | breakpoint_set_thread (struct breakpoint *b, int thread) |
| 819 | { |
| 820 | int old_thread = b->thread; |
| 821 | |
| 822 | b->thread = thread; |
| 823 | if (old_thread != thread) |
| 824 | observer_notify_breakpoint_modified (b); |
| 825 | } |
| 826 | |
| 827 | /* Set the task for this breakpoint. If TASK is 0, make the |
| 828 | breakpoint work for any task. */ |
| 829 | |
| 830 | void |
| 831 | breakpoint_set_task (struct breakpoint *b, int task) |
| 832 | { |
| 833 | int old_task = b->task; |
| 834 | |
| 835 | b->task = task; |
| 836 | if (old_task != task) |
| 837 | observer_notify_breakpoint_modified (b); |
| 838 | } |
| 839 | |
| 840 | void |
| 841 | check_tracepoint_command (char *line, void *closure) |
| 842 | { |
| 843 | struct breakpoint *b = closure; |
| 844 | |
| 845 | validate_actionline (&line, b); |
| 846 | } |
| 847 | |
| 848 | /* A structure used to pass information through |
| 849 | map_breakpoint_numbers. */ |
| 850 | |
| 851 | struct commands_info |
| 852 | { |
| 853 | /* True if the command was typed at a tty. */ |
| 854 | int from_tty; |
| 855 | |
| 856 | /* The breakpoint range spec. */ |
| 857 | char *arg; |
| 858 | |
| 859 | /* Non-NULL if the body of the commands are being read from this |
| 860 | already-parsed command. */ |
| 861 | struct command_line *control; |
| 862 | |
| 863 | /* The command lines read from the user, or NULL if they have not |
| 864 | yet been read. */ |
| 865 | struct counted_command_line *cmd; |
| 866 | }; |
| 867 | |
| 868 | /* A callback for map_breakpoint_numbers that sets the commands for |
| 869 | commands_command. */ |
| 870 | |
| 871 | static void |
| 872 | do_map_commands_command (struct breakpoint *b, void *data) |
| 873 | { |
| 874 | struct commands_info *info = data; |
| 875 | |
| 876 | if (info->cmd == NULL) |
| 877 | { |
| 878 | struct command_line *l; |
| 879 | |
| 880 | if (info->control != NULL) |
| 881 | l = copy_command_lines (info->control->body_list[0]); |
| 882 | else |
| 883 | { |
| 884 | struct cleanup *old_chain; |
| 885 | char *str; |
| 886 | |
| 887 | str = xstrprintf (_("Type commands for breakpoint(s) " |
| 888 | "%s, one per line."), |
| 889 | info->arg); |
| 890 | |
| 891 | old_chain = make_cleanup (xfree, str); |
| 892 | |
| 893 | l = read_command_lines (str, |
| 894 | info->from_tty, 1, |
| 895 | (is_tracepoint (b) |
| 896 | ? check_tracepoint_command : 0), |
| 897 | b); |
| 898 | |
| 899 | do_cleanups (old_chain); |
| 900 | } |
| 901 | |
| 902 | info->cmd = alloc_counted_command_line (l); |
| 903 | } |
| 904 | |
| 905 | /* If a breakpoint was on the list more than once, we don't need to |
| 906 | do anything. */ |
| 907 | if (b->commands != info->cmd) |
| 908 | { |
| 909 | validate_commands_for_breakpoint (b, info->cmd->commands); |
| 910 | incref_counted_command_line (info->cmd); |
| 911 | decref_counted_command_line (&b->commands); |
| 912 | b->commands = info->cmd; |
| 913 | breakpoints_changed (); |
| 914 | observer_notify_breakpoint_modified (b); |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | static void |
| 919 | commands_command_1 (char *arg, int from_tty, |
| 920 | struct command_line *control) |
| 921 | { |
| 922 | struct cleanup *cleanups; |
| 923 | struct commands_info info; |
| 924 | |
| 925 | info.from_tty = from_tty; |
| 926 | info.control = control; |
| 927 | info.cmd = NULL; |
| 928 | /* If we read command lines from the user, then `info' will hold an |
| 929 | extra reference to the commands that we must clean up. */ |
| 930 | cleanups = make_cleanup_decref_counted_command_line (&info.cmd); |
| 931 | |
| 932 | if (arg == NULL || !*arg) |
| 933 | { |
| 934 | if (breakpoint_count - prev_breakpoint_count > 1) |
| 935 | arg = xstrprintf ("%d-%d", prev_breakpoint_count + 1, |
| 936 | breakpoint_count); |
| 937 | else if (breakpoint_count > 0) |
| 938 | arg = xstrprintf ("%d", breakpoint_count); |
| 939 | else |
| 940 | { |
| 941 | /* So that we don't try to free the incoming non-NULL |
| 942 | argument in the cleanup below. Mapping breakpoint |
| 943 | numbers will fail in this case. */ |
| 944 | arg = NULL; |
| 945 | } |
| 946 | } |
| 947 | else |
| 948 | /* The command loop has some static state, so we need to preserve |
| 949 | our argument. */ |
| 950 | arg = xstrdup (arg); |
| 951 | |
| 952 | if (arg != NULL) |
| 953 | make_cleanup (xfree, arg); |
| 954 | |
| 955 | info.arg = arg; |
| 956 | |
| 957 | map_breakpoint_numbers (arg, do_map_commands_command, &info); |
| 958 | |
| 959 | if (info.cmd == NULL) |
| 960 | error (_("No breakpoints specified.")); |
| 961 | |
| 962 | do_cleanups (cleanups); |
| 963 | } |
| 964 | |
| 965 | static void |
| 966 | commands_command (char *arg, int from_tty) |
| 967 | { |
| 968 | commands_command_1 (arg, from_tty, NULL); |
| 969 | } |
| 970 | |
| 971 | /* Like commands_command, but instead of reading the commands from |
| 972 | input stream, takes them from an already parsed command structure. |
| 973 | |
| 974 | This is used by cli-script.c to DTRT with breakpoint commands |
| 975 | that are part of if and while bodies. */ |
| 976 | enum command_control_type |
| 977 | commands_from_control_command (char *arg, struct command_line *cmd) |
| 978 | { |
| 979 | commands_command_1 (arg, 0, cmd); |
| 980 | return simple_control; |
| 981 | } |
| 982 | |
| 983 | /* Return non-zero if BL->TARGET_INFO contains valid information. */ |
| 984 | |
| 985 | static int |
| 986 | bp_location_has_shadow (struct bp_location *bl) |
| 987 | { |
| 988 | if (bl->loc_type != bp_loc_software_breakpoint) |
| 989 | return 0; |
| 990 | if (!bl->inserted) |
| 991 | return 0; |
| 992 | if (bl->target_info.shadow_len == 0) |
| 993 | /* bp isn't valid, or doesn't shadow memory. */ |
| 994 | return 0; |
| 995 | return 1; |
| 996 | } |
| 997 | |
| 998 | /* Update BUF, which is LEN bytes read from the target address MEMADDR, |
| 999 | by replacing any memory breakpoints with their shadowed contents. |
| 1000 | |
| 1001 | The range of shadowed area by each bp_location is: |
| 1002 | bl->address - bp_location_placed_address_before_address_max |
| 1003 | up to bl->address + bp_location_shadow_len_after_address_max |
| 1004 | The range we were requested to resolve shadows for is: |
| 1005 | memaddr ... memaddr + len |
| 1006 | Thus the safe cutoff boundaries for performance optimization are |
| 1007 | memaddr + len <= (bl->address |
| 1008 | - bp_location_placed_address_before_address_max) |
| 1009 | and: |
| 1010 | bl->address + bp_location_shadow_len_after_address_max <= memaddr */ |
| 1011 | |
| 1012 | void |
| 1013 | breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr, LONGEST len) |
| 1014 | { |
| 1015 | /* Left boundary, right boundary and median element of our binary |
| 1016 | search. */ |
| 1017 | unsigned bc_l, bc_r, bc; |
| 1018 | |
| 1019 | /* Find BC_L which is a leftmost element which may affect BUF |
| 1020 | content. It is safe to report lower value but a failure to |
| 1021 | report higher one. */ |
| 1022 | |
| 1023 | bc_l = 0; |
| 1024 | bc_r = bp_location_count; |
| 1025 | while (bc_l + 1 < bc_r) |
| 1026 | { |
| 1027 | struct bp_location *bl; |
| 1028 | |
| 1029 | bc = (bc_l + bc_r) / 2; |
| 1030 | bl = bp_location[bc]; |
| 1031 | |
| 1032 | /* Check first BL->ADDRESS will not overflow due to the added |
| 1033 | constant. Then advance the left boundary only if we are sure |
| 1034 | the BC element can in no way affect the BUF content (MEMADDR |
| 1035 | to MEMADDR + LEN range). |
| 1036 | |
| 1037 | Use the BP_LOCATION_SHADOW_LEN_AFTER_ADDRESS_MAX safety |
| 1038 | offset so that we cannot miss a breakpoint with its shadow |
| 1039 | range tail still reaching MEMADDR. */ |
| 1040 | |
| 1041 | if ((bl->address + bp_location_shadow_len_after_address_max |
| 1042 | >= bl->address) |
| 1043 | && (bl->address + bp_location_shadow_len_after_address_max |
| 1044 | <= memaddr)) |
| 1045 | bc_l = bc; |
| 1046 | else |
| 1047 | bc_r = bc; |
| 1048 | } |
| 1049 | |
| 1050 | /* Due to the binary search above, we need to make sure we pick the |
| 1051 | first location that's at BC_L's address. E.g., if there are |
| 1052 | multiple locations at the same address, BC_L may end up pointing |
| 1053 | at a duplicate location, and miss the "master"/"inserted" |
| 1054 | location. Say, given locations L1, L2 and L3 at addresses A and |
| 1055 | B: |
| 1056 | |
| 1057 | L1@A, L2@A, L3@B, ... |
| 1058 | |
| 1059 | BC_L could end up pointing at location L2, while the "master" |
| 1060 | location could be L1. Since the `loc->inserted' flag is only set |
| 1061 | on "master" locations, we'd forget to restore the shadow of L1 |
| 1062 | and L2. */ |
| 1063 | while (bc_l > 0 |
| 1064 | && bp_location[bc_l]->address == bp_location[bc_l - 1]->address) |
| 1065 | bc_l--; |
| 1066 | |
| 1067 | /* Now do full processing of the found relevant range of elements. */ |
| 1068 | |
| 1069 | for (bc = bc_l; bc < bp_location_count; bc++) |
| 1070 | { |
| 1071 | struct bp_location *bl = bp_location[bc]; |
| 1072 | CORE_ADDR bp_addr = 0; |
| 1073 | int bp_size = 0; |
| 1074 | int bptoffset = 0; |
| 1075 | |
| 1076 | /* bp_location array has BL->OWNER always non-NULL. */ |
| 1077 | if (bl->owner->type == bp_none) |
| 1078 | warning (_("reading through apparently deleted breakpoint #%d?"), |
| 1079 | bl->owner->number); |
| 1080 | |
| 1081 | /* Performance optimization: any futher element can no longer affect BUF |
| 1082 | content. */ |
| 1083 | |
| 1084 | if (bl->address >= bp_location_placed_address_before_address_max |
| 1085 | && memaddr + len <= (bl->address |
| 1086 | - bp_location_placed_address_before_address_max)) |
| 1087 | break; |
| 1088 | |
| 1089 | if (!bp_location_has_shadow (bl)) |
| 1090 | continue; |
| 1091 | if (!breakpoint_address_match (bl->target_info.placed_address_space, 0, |
| 1092 | current_program_space->aspace, 0)) |
| 1093 | continue; |
| 1094 | |
| 1095 | /* Addresses and length of the part of the breakpoint that |
| 1096 | we need to copy. */ |
| 1097 | bp_addr = bl->target_info.placed_address; |
| 1098 | bp_size = bl->target_info.shadow_len; |
| 1099 | |
| 1100 | if (bp_addr + bp_size <= memaddr) |
| 1101 | /* The breakpoint is entirely before the chunk of memory we |
| 1102 | are reading. */ |
| 1103 | continue; |
| 1104 | |
| 1105 | if (bp_addr >= memaddr + len) |
| 1106 | /* The breakpoint is entirely after the chunk of memory we are |
| 1107 | reading. */ |
| 1108 | continue; |
| 1109 | |
| 1110 | /* Offset within shadow_contents. */ |
| 1111 | if (bp_addr < memaddr) |
| 1112 | { |
| 1113 | /* Only copy the second part of the breakpoint. */ |
| 1114 | bp_size -= memaddr - bp_addr; |
| 1115 | bptoffset = memaddr - bp_addr; |
| 1116 | bp_addr = memaddr; |
| 1117 | } |
| 1118 | |
| 1119 | if (bp_addr + bp_size > memaddr + len) |
| 1120 | { |
| 1121 | /* Only copy the first part of the breakpoint. */ |
| 1122 | bp_size -= (bp_addr + bp_size) - (memaddr + len); |
| 1123 | } |
| 1124 | |
| 1125 | memcpy (buf + bp_addr - memaddr, |
| 1126 | bl->target_info.shadow_contents + bptoffset, bp_size); |
| 1127 | } |
| 1128 | } |
| 1129 | \f |
| 1130 | |
| 1131 | /* Return true if BPT is of any hardware watchpoint kind. */ |
| 1132 | |
| 1133 | static int |
| 1134 | is_hardware_watchpoint (const struct breakpoint *bpt) |
| 1135 | { |
| 1136 | return (bpt->type == bp_hardware_watchpoint |
| 1137 | || bpt->type == bp_read_watchpoint |
| 1138 | || bpt->type == bp_access_watchpoint); |
| 1139 | } |
| 1140 | |
| 1141 | /* Return true if BPT is of any watchpoint kind, hardware or |
| 1142 | software. */ |
| 1143 | |
| 1144 | static int |
| 1145 | is_watchpoint (const struct breakpoint *bpt) |
| 1146 | { |
| 1147 | return (is_hardware_watchpoint (bpt) |
| 1148 | || bpt->type == bp_watchpoint); |
| 1149 | } |
| 1150 | |
| 1151 | /* Assuming that B is a watchpoint: returns true if the current thread |
| 1152 | and its running state are safe to evaluate or update watchpoint B. |
| 1153 | Watchpoints on local expressions need to be evaluated in the |
| 1154 | context of the thread that was current when the watchpoint was |
| 1155 | created, and, that thread needs to be stopped to be able to select |
| 1156 | the correct frame context. Watchpoints on global expressions can |
| 1157 | be evaluated on any thread, and in any state. It is presently left |
| 1158 | to the target allowing memory accesses when threads are |
| 1159 | running. */ |
| 1160 | |
| 1161 | static int |
| 1162 | watchpoint_in_thread_scope (struct breakpoint *b) |
| 1163 | { |
| 1164 | return (ptid_equal (b->watchpoint_thread, null_ptid) |
| 1165 | || (ptid_equal (inferior_ptid, b->watchpoint_thread) |
| 1166 | && !is_executing (inferior_ptid))); |
| 1167 | } |
| 1168 | |
| 1169 | /* Set watchpoint B to disp_del_at_next_stop, even including its possible |
| 1170 | associated bp_watchpoint_scope breakpoint. */ |
| 1171 | |
| 1172 | static void |
| 1173 | watchpoint_del_at_next_stop (struct breakpoint *b) |
| 1174 | { |
| 1175 | gdb_assert (is_watchpoint (b)); |
| 1176 | |
| 1177 | if (b->related_breakpoint != b) |
| 1178 | { |
| 1179 | gdb_assert (b->related_breakpoint->type == bp_watchpoint_scope); |
| 1180 | gdb_assert (b->related_breakpoint->related_breakpoint == b); |
| 1181 | b->related_breakpoint->disposition = disp_del_at_next_stop; |
| 1182 | b->related_breakpoint->related_breakpoint = b->related_breakpoint; |
| 1183 | b->related_breakpoint = b; |
| 1184 | } |
| 1185 | b->disposition = disp_del_at_next_stop; |
| 1186 | } |
| 1187 | |
| 1188 | /* Assuming that B is a watchpoint: |
| 1189 | - Reparse watchpoint expression, if REPARSE is non-zero |
| 1190 | - Evaluate expression and store the result in B->val |
| 1191 | - Evaluate the condition if there is one, and store the result |
| 1192 | in b->loc->cond. |
| 1193 | - Update the list of values that must be watched in B->loc. |
| 1194 | |
| 1195 | If the watchpoint disposition is disp_del_at_next_stop, then do |
| 1196 | nothing. If this is local watchpoint that is out of scope, delete |
| 1197 | it. |
| 1198 | |
| 1199 | Even with `set breakpoint always-inserted on' the watchpoints are |
| 1200 | removed + inserted on each stop here. Normal breakpoints must |
| 1201 | never be removed because they might be missed by a running thread |
| 1202 | when debugging in non-stop mode. On the other hand, hardware |
| 1203 | watchpoints (is_hardware_watchpoint; processed here) are specific |
| 1204 | to each LWP since they are stored in each LWP's hardware debug |
| 1205 | registers. Therefore, such LWP must be stopped first in order to |
| 1206 | be able to modify its hardware watchpoints. |
| 1207 | |
| 1208 | Hardware watchpoints must be reset exactly once after being |
| 1209 | presented to the user. It cannot be done sooner, because it would |
| 1210 | reset the data used to present the watchpoint hit to the user. And |
| 1211 | it must not be done later because it could display the same single |
| 1212 | watchpoint hit during multiple GDB stops. Note that the latter is |
| 1213 | relevant only to the hardware watchpoint types bp_read_watchpoint |
| 1214 | and bp_access_watchpoint. False hit by bp_hardware_watchpoint is |
| 1215 | not user-visible - its hit is suppressed if the memory content has |
| 1216 | not changed. |
| 1217 | |
| 1218 | The following constraints influence the location where we can reset |
| 1219 | hardware watchpoints: |
| 1220 | |
| 1221 | * target_stopped_by_watchpoint and target_stopped_data_address are |
| 1222 | called several times when GDB stops. |
| 1223 | |
| 1224 | [linux] |
| 1225 | * Multiple hardware watchpoints can be hit at the same time, |
| 1226 | causing GDB to stop. GDB only presents one hardware watchpoint |
| 1227 | hit at a time as the reason for stopping, and all the other hits |
| 1228 | are presented later, one after the other, each time the user |
| 1229 | requests the execution to be resumed. Execution is not resumed |
| 1230 | for the threads still having pending hit event stored in |
| 1231 | LWP_INFO->STATUS. While the watchpoint is already removed from |
| 1232 | the inferior on the first stop the thread hit event is kept being |
| 1233 | reported from its cached value by linux_nat_stopped_data_address |
| 1234 | until the real thread resume happens after the watchpoint gets |
| 1235 | presented and thus its LWP_INFO->STATUS gets reset. |
| 1236 | |
| 1237 | Therefore the hardware watchpoint hit can get safely reset on the |
| 1238 | watchpoint removal from inferior. */ |
| 1239 | |
| 1240 | static void |
| 1241 | update_watchpoint (struct breakpoint *b, int reparse) |
| 1242 | { |
| 1243 | int within_current_scope; |
| 1244 | struct frame_id saved_frame_id; |
| 1245 | int frame_saved; |
| 1246 | |
| 1247 | gdb_assert (is_watchpoint (b)); |
| 1248 | |
| 1249 | /* If this is a local watchpoint, we only want to check if the |
| 1250 | watchpoint frame is in scope if the current thread is the thread |
| 1251 | that was used to create the watchpoint. */ |
| 1252 | if (!watchpoint_in_thread_scope (b)) |
| 1253 | return; |
| 1254 | |
| 1255 | if (b->disposition == disp_del_at_next_stop) |
| 1256 | return; |
| 1257 | |
| 1258 | frame_saved = 0; |
| 1259 | |
| 1260 | /* Determine if the watchpoint is within scope. */ |
| 1261 | if (b->exp_valid_block == NULL) |
| 1262 | within_current_scope = 1; |
| 1263 | else |
| 1264 | { |
| 1265 | struct frame_info *fi = get_current_frame (); |
| 1266 | struct gdbarch *frame_arch = get_frame_arch (fi); |
| 1267 | CORE_ADDR frame_pc = get_frame_pc (fi); |
| 1268 | |
| 1269 | /* If we're in a function epilogue, unwinding may not work |
| 1270 | properly, so do not attempt to recreate locations at this |
| 1271 | point. See similar comments in watchpoint_check. */ |
| 1272 | if (gdbarch_in_function_epilogue_p (frame_arch, frame_pc)) |
| 1273 | return; |
| 1274 | |
| 1275 | /* Save the current frame's ID so we can restore it after |
| 1276 | evaluating the watchpoint expression on its own frame. */ |
| 1277 | /* FIXME drow/2003-09-09: It would be nice if evaluate_expression |
| 1278 | took a frame parameter, so that we didn't have to change the |
| 1279 | selected frame. */ |
| 1280 | frame_saved = 1; |
| 1281 | saved_frame_id = get_frame_id (get_selected_frame (NULL)); |
| 1282 | |
| 1283 | fi = frame_find_by_id (b->watchpoint_frame); |
| 1284 | within_current_scope = (fi != NULL); |
| 1285 | if (within_current_scope) |
| 1286 | select_frame (fi); |
| 1287 | } |
| 1288 | |
| 1289 | /* We don't free locations. They are stored in the bp_location array |
| 1290 | and update_global_location_list will eventually delete them and |
| 1291 | remove breakpoints if needed. */ |
| 1292 | b->loc = NULL; |
| 1293 | |
| 1294 | if (within_current_scope && reparse) |
| 1295 | { |
| 1296 | char *s; |
| 1297 | |
| 1298 | if (b->exp) |
| 1299 | { |
| 1300 | xfree (b->exp); |
| 1301 | b->exp = NULL; |
| 1302 | } |
| 1303 | s = b->exp_string_reparse ? b->exp_string_reparse : b->exp_string; |
| 1304 | b->exp = parse_exp_1 (&s, b->exp_valid_block, 0); |
| 1305 | /* If the meaning of expression itself changed, the old value is |
| 1306 | no longer relevant. We don't want to report a watchpoint hit |
| 1307 | to the user when the old value and the new value may actually |
| 1308 | be completely different objects. */ |
| 1309 | value_free (b->val); |
| 1310 | b->val = NULL; |
| 1311 | b->val_valid = 0; |
| 1312 | |
| 1313 | /* Note that unlike with breakpoints, the watchpoint's condition |
| 1314 | expression is stored in the breakpoint object, not in the |
| 1315 | locations (re)created below. */ |
| 1316 | if (b->cond_string != NULL) |
| 1317 | { |
| 1318 | if (b->cond_exp != NULL) |
| 1319 | { |
| 1320 | xfree (b->cond_exp); |
| 1321 | b->cond_exp = NULL; |
| 1322 | } |
| 1323 | |
| 1324 | s = b->cond_string; |
| 1325 | b->cond_exp = parse_exp_1 (&s, b->cond_exp_valid_block, 0); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | /* If we failed to parse the expression, for example because |
| 1330 | it refers to a global variable in a not-yet-loaded shared library, |
| 1331 | don't try to insert watchpoint. We don't automatically delete |
| 1332 | such watchpoint, though, since failure to parse expression |
| 1333 | is different from out-of-scope watchpoint. */ |
| 1334 | if ( !target_has_execution) |
| 1335 | { |
| 1336 | /* Without execution, memory can't change. No use to try and |
| 1337 | set watchpoint locations. The watchpoint will be reset when |
| 1338 | the target gains execution, through breakpoint_re_set. */ |
| 1339 | } |
| 1340 | else if (within_current_scope && b->exp) |
| 1341 | { |
| 1342 | int pc = 0; |
| 1343 | struct value *val_chain, *v, *result, *next; |
| 1344 | struct program_space *frame_pspace; |
| 1345 | |
| 1346 | fetch_subexp_value (b->exp, &pc, &v, &result, &val_chain); |
| 1347 | |
| 1348 | /* Avoid setting b->val if it's already set. The meaning of |
| 1349 | b->val is 'the last value' user saw, and we should update |
| 1350 | it only if we reported that last value to user. As it |
| 1351 | happens, the code that reports it updates b->val directly. |
| 1352 | We don't keep track of the memory value for masked |
| 1353 | watchpoints. */ |
| 1354 | if (!b->val_valid && !is_masked_watchpoint (b)) |
| 1355 | { |
| 1356 | b->val = v; |
| 1357 | b->val_valid = 1; |
| 1358 | } |
| 1359 | |
| 1360 | frame_pspace = get_frame_program_space (get_selected_frame (NULL)); |
| 1361 | |
| 1362 | /* Look at each value on the value chain. */ |
| 1363 | for (v = val_chain; v; v = value_next (v)) |
| 1364 | { |
| 1365 | /* If it's a memory location, and GDB actually needed |
| 1366 | its contents to evaluate the expression, then we |
| 1367 | must watch it. If the first value returned is |
| 1368 | still lazy, that means an error occurred reading it; |
| 1369 | watch it anyway in case it becomes readable. */ |
| 1370 | if (VALUE_LVAL (v) == lval_memory |
| 1371 | && (v == val_chain || ! value_lazy (v))) |
| 1372 | { |
| 1373 | struct type *vtype = check_typedef (value_type (v)); |
| 1374 | |
| 1375 | /* We only watch structs and arrays if user asked |
| 1376 | for it explicitly, never if they just happen to |
| 1377 | appear in the middle of some value chain. */ |
| 1378 | if (v == result |
| 1379 | || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| 1380 | && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| 1381 | { |
| 1382 | CORE_ADDR addr; |
| 1383 | int len, type; |
| 1384 | struct bp_location *loc, **tmp; |
| 1385 | |
| 1386 | addr = value_address (v); |
| 1387 | len = TYPE_LENGTH (value_type (v)); |
| 1388 | type = hw_write; |
| 1389 | if (b->type == bp_read_watchpoint) |
| 1390 | type = hw_read; |
| 1391 | else if (b->type == bp_access_watchpoint) |
| 1392 | type = hw_access; |
| 1393 | |
| 1394 | loc = allocate_bp_location (b); |
| 1395 | for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next)) |
| 1396 | ; |
| 1397 | *tmp = loc; |
| 1398 | loc->gdbarch = get_type_arch (value_type (v)); |
| 1399 | |
| 1400 | loc->pspace = frame_pspace; |
| 1401 | loc->address = addr; |
| 1402 | loc->length = len; |
| 1403 | loc->watchpoint_type = type; |
| 1404 | } |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | /* Change the type of breakpoint between hardware assisted or |
| 1409 | an ordinary watchpoint depending on the hardware support |
| 1410 | and free hardware slots. REPARSE is set when the inferior |
| 1411 | is started. */ |
| 1412 | if (reparse) |
| 1413 | { |
| 1414 | int reg_cnt; |
| 1415 | enum bp_loc_type loc_type; |
| 1416 | struct bp_location *bl; |
| 1417 | |
| 1418 | reg_cnt = can_use_hardware_watchpoint (val_chain); |
| 1419 | |
| 1420 | if (reg_cnt) |
| 1421 | { |
| 1422 | int i, target_resources_ok, other_type_used; |
| 1423 | |
| 1424 | /* Use an exact watchpoint when there's only one memory region to be |
| 1425 | watched, and only one debug register is needed to watch it. */ |
| 1426 | b->exact = target_exact_watchpoints && reg_cnt == 1; |
| 1427 | |
| 1428 | /* We need to determine how many resources are already |
| 1429 | used for all other hardware watchpoints plus this one |
| 1430 | to see if we still have enough resources to also fit |
| 1431 | this watchpoint in as well. To guarantee the |
| 1432 | hw_watchpoint_used_count call below counts this |
| 1433 | watchpoint, make sure that it is marked as a hardware |
| 1434 | watchpoint. */ |
| 1435 | if (b->type == bp_watchpoint) |
| 1436 | b->type = bp_hardware_watchpoint; |
| 1437 | |
| 1438 | i = hw_watchpoint_used_count (b->type, &other_type_used); |
| 1439 | target_resources_ok = target_can_use_hardware_watchpoint |
| 1440 | (b->type, i, other_type_used); |
| 1441 | if (target_resources_ok <= 0) |
| 1442 | { |
| 1443 | /* If there's no works_in_software_mode method, we |
| 1444 | assume that the watchpoint works in software mode. */ |
| 1445 | int sw_mode = (!b->ops || !b->ops->works_in_software_mode |
| 1446 | || b->ops->works_in_software_mode (b)); |
| 1447 | |
| 1448 | if (target_resources_ok == 0 && !sw_mode) |
| 1449 | error (_("Target does not support this type of " |
| 1450 | "hardware watchpoint.")); |
| 1451 | else if (target_resources_ok < 0 && !sw_mode) |
| 1452 | error (_("There are not enough available hardware " |
| 1453 | "resources for this watchpoint.")); |
| 1454 | else |
| 1455 | b->type = bp_watchpoint; |
| 1456 | } |
| 1457 | } |
| 1458 | else if (b->ops && b->ops->works_in_software_mode |
| 1459 | && !b->ops->works_in_software_mode (b)) |
| 1460 | error (_("Expression cannot be implemented with " |
| 1461 | "read/access watchpoint.")); |
| 1462 | else |
| 1463 | b->type = bp_watchpoint; |
| 1464 | |
| 1465 | loc_type = (b->type == bp_watchpoint? bp_loc_other |
| 1466 | : bp_loc_hardware_watchpoint); |
| 1467 | for (bl = b->loc; bl; bl = bl->next) |
| 1468 | bl->loc_type = loc_type; |
| 1469 | } |
| 1470 | |
| 1471 | for (v = val_chain; v; v = next) |
| 1472 | { |
| 1473 | next = value_next (v); |
| 1474 | if (v != b->val) |
| 1475 | value_free (v); |
| 1476 | } |
| 1477 | |
| 1478 | /* If a software watchpoint is not watching any memory, then the |
| 1479 | above left it without any location set up. But, |
| 1480 | bpstat_stop_status requires a location to be able to report |
| 1481 | stops, so make sure there's at least a dummy one. */ |
| 1482 | if (b->type == bp_watchpoint && b->loc == NULL) |
| 1483 | { |
| 1484 | b->loc = allocate_bp_location (b); |
| 1485 | b->loc->pspace = frame_pspace; |
| 1486 | b->loc->address = -1; |
| 1487 | b->loc->length = -1; |
| 1488 | b->loc->watchpoint_type = -1; |
| 1489 | } |
| 1490 | } |
| 1491 | else if (!within_current_scope) |
| 1492 | { |
| 1493 | printf_filtered (_("\ |
| 1494 | Watchpoint %d deleted because the program has left the block\n\ |
| 1495 | in which its expression is valid.\n"), |
| 1496 | b->number); |
| 1497 | watchpoint_del_at_next_stop (b); |
| 1498 | } |
| 1499 | |
| 1500 | /* Restore the selected frame. */ |
| 1501 | if (frame_saved) |
| 1502 | select_frame (frame_find_by_id (saved_frame_id)); |
| 1503 | } |
| 1504 | |
| 1505 | |
| 1506 | /* Returns 1 iff breakpoint location should be |
| 1507 | inserted in the inferior. */ |
| 1508 | static int |
| 1509 | should_be_inserted (struct bp_location *bl) |
| 1510 | { |
| 1511 | if (bl->owner == NULL || !breakpoint_enabled (bl->owner)) |
| 1512 | return 0; |
| 1513 | |
| 1514 | if (bl->owner->disposition == disp_del_at_next_stop) |
| 1515 | return 0; |
| 1516 | |
| 1517 | if (!bl->enabled || bl->shlib_disabled || bl->duplicate) |
| 1518 | return 0; |
| 1519 | |
| 1520 | /* This is set for example, when we're attached to the parent of a |
| 1521 | vfork, and have detached from the child. The child is running |
| 1522 | free, and we expect it to do an exec or exit, at which point the |
| 1523 | OS makes the parent schedulable again (and the target reports |
| 1524 | that the vfork is done). Until the child is done with the shared |
| 1525 | memory region, do not insert breakpoints in the parent, otherwise |
| 1526 | the child could still trip on the parent's breakpoints. Since |
| 1527 | the parent is blocked anyway, it won't miss any breakpoint. */ |
| 1528 | if (bl->pspace->breakpoints_not_allowed) |
| 1529 | return 0; |
| 1530 | |
| 1531 | /* Tracepoints are inserted by the target at a time of its choosing, |
| 1532 | not by us. */ |
| 1533 | if (is_tracepoint (bl->owner)) |
| 1534 | return 0; |
| 1535 | |
| 1536 | return 1; |
| 1537 | } |
| 1538 | |
| 1539 | /* Insert a low-level "breakpoint" of some type. BL is the breakpoint |
| 1540 | location. Any error messages are printed to TMP_ERROR_STREAM; and |
| 1541 | DISABLED_BREAKS, and HW_BREAKPOINT_ERROR are used to report problems. |
| 1542 | |
| 1543 | NOTE drow/2003-09-09: This routine could be broken down to an |
| 1544 | object-style method for each breakpoint or catchpoint type. */ |
| 1545 | static int |
| 1546 | insert_bp_location (struct bp_location *bl, |
| 1547 | struct ui_file *tmp_error_stream, |
| 1548 | int *disabled_breaks, |
| 1549 | int *hw_breakpoint_error) |
| 1550 | { |
| 1551 | int val = 0; |
| 1552 | |
| 1553 | if (!should_be_inserted (bl) || bl->inserted) |
| 1554 | return 0; |
| 1555 | |
| 1556 | /* Initialize the target-specific information. */ |
| 1557 | memset (&bl->target_info, 0, sizeof (bl->target_info)); |
| 1558 | bl->target_info.placed_address = bl->address; |
| 1559 | bl->target_info.placed_address_space = bl->pspace->aspace; |
| 1560 | bl->target_info.length = bl->length; |
| 1561 | |
| 1562 | if (bl->loc_type == bp_loc_software_breakpoint |
| 1563 | || bl->loc_type == bp_loc_hardware_breakpoint) |
| 1564 | { |
| 1565 | if (bl->owner->type != bp_hardware_breakpoint) |
| 1566 | { |
| 1567 | /* If the explicitly specified breakpoint type |
| 1568 | is not hardware breakpoint, check the memory map to see |
| 1569 | if the breakpoint address is in read only memory or not. |
| 1570 | |
| 1571 | Two important cases are: |
| 1572 | - location type is not hardware breakpoint, memory |
| 1573 | is readonly. We change the type of the location to |
| 1574 | hardware breakpoint. |
| 1575 | - location type is hardware breakpoint, memory is |
| 1576 | read-write. This means we've previously made the |
| 1577 | location hardware one, but then the memory map changed, |
| 1578 | so we undo. |
| 1579 | |
| 1580 | When breakpoints are removed, remove_breakpoints will use |
| 1581 | location types we've just set here, the only possible |
| 1582 | problem is that memory map has changed during running |
| 1583 | program, but it's not going to work anyway with current |
| 1584 | gdb. */ |
| 1585 | struct mem_region *mr |
| 1586 | = lookup_mem_region (bl->target_info.placed_address); |
| 1587 | |
| 1588 | if (mr) |
| 1589 | { |
| 1590 | if (automatic_hardware_breakpoints) |
| 1591 | { |
| 1592 | enum bp_loc_type new_type; |
| 1593 | |
| 1594 | if (mr->attrib.mode != MEM_RW) |
| 1595 | new_type = bp_loc_hardware_breakpoint; |
| 1596 | else |
| 1597 | new_type = bp_loc_software_breakpoint; |
| 1598 | |
| 1599 | if (new_type != bl->loc_type) |
| 1600 | { |
| 1601 | static int said = 0; |
| 1602 | |
| 1603 | bl->loc_type = new_type; |
| 1604 | if (!said) |
| 1605 | { |
| 1606 | fprintf_filtered (gdb_stdout, |
| 1607 | _("Note: automatically using " |
| 1608 | "hardware breakpoints for " |
| 1609 | "read-only addresses.\n")); |
| 1610 | said = 1; |
| 1611 | } |
| 1612 | } |
| 1613 | } |
| 1614 | else if (bl->loc_type == bp_loc_software_breakpoint |
| 1615 | && mr->attrib.mode != MEM_RW) |
| 1616 | warning (_("cannot set software breakpoint " |
| 1617 | "at readonly address %s"), |
| 1618 | paddress (bl->gdbarch, bl->address)); |
| 1619 | } |
| 1620 | } |
| 1621 | |
| 1622 | /* First check to see if we have to handle an overlay. */ |
| 1623 | if (overlay_debugging == ovly_off |
| 1624 | || bl->section == NULL |
| 1625 | || !(section_is_overlay (bl->section))) |
| 1626 | { |
| 1627 | /* No overlay handling: just set the breakpoint. */ |
| 1628 | |
| 1629 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 1630 | val = target_insert_hw_breakpoint (bl->gdbarch, |
| 1631 | &bl->target_info); |
| 1632 | else |
| 1633 | val = target_insert_breakpoint (bl->gdbarch, |
| 1634 | &bl->target_info); |
| 1635 | } |
| 1636 | else |
| 1637 | { |
| 1638 | /* This breakpoint is in an overlay section. |
| 1639 | Shall we set a breakpoint at the LMA? */ |
| 1640 | if (!overlay_events_enabled) |
| 1641 | { |
| 1642 | /* Yes -- overlay event support is not active, |
| 1643 | so we must try to set a breakpoint at the LMA. |
| 1644 | This will not work for a hardware breakpoint. */ |
| 1645 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 1646 | warning (_("hardware breakpoint %d not supported in overlay!"), |
| 1647 | bl->owner->number); |
| 1648 | else |
| 1649 | { |
| 1650 | CORE_ADDR addr = overlay_unmapped_address (bl->address, |
| 1651 | bl->section); |
| 1652 | /* Set a software (trap) breakpoint at the LMA. */ |
| 1653 | bl->overlay_target_info = bl->target_info; |
| 1654 | bl->overlay_target_info.placed_address = addr; |
| 1655 | val = target_insert_breakpoint (bl->gdbarch, |
| 1656 | &bl->overlay_target_info); |
| 1657 | if (val != 0) |
| 1658 | fprintf_unfiltered (tmp_error_stream, |
| 1659 | "Overlay breakpoint %d " |
| 1660 | "failed: in ROM?\n", |
| 1661 | bl->owner->number); |
| 1662 | } |
| 1663 | } |
| 1664 | /* Shall we set a breakpoint at the VMA? */ |
| 1665 | if (section_is_mapped (bl->section)) |
| 1666 | { |
| 1667 | /* Yes. This overlay section is mapped into memory. */ |
| 1668 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 1669 | val = target_insert_hw_breakpoint (bl->gdbarch, |
| 1670 | &bl->target_info); |
| 1671 | else |
| 1672 | val = target_insert_breakpoint (bl->gdbarch, |
| 1673 | &bl->target_info); |
| 1674 | } |
| 1675 | else |
| 1676 | { |
| 1677 | /* No. This breakpoint will not be inserted. |
| 1678 | No error, but do not mark the bp as 'inserted'. */ |
| 1679 | return 0; |
| 1680 | } |
| 1681 | } |
| 1682 | |
| 1683 | if (val) |
| 1684 | { |
| 1685 | /* Can't set the breakpoint. */ |
| 1686 | if (solib_name_from_address (bl->pspace, bl->address)) |
| 1687 | { |
| 1688 | /* See also: disable_breakpoints_in_shlibs. */ |
| 1689 | val = 0; |
| 1690 | bl->shlib_disabled = 1; |
| 1691 | observer_notify_breakpoint_modified (bl->owner); |
| 1692 | if (!*disabled_breaks) |
| 1693 | { |
| 1694 | fprintf_unfiltered (tmp_error_stream, |
| 1695 | "Cannot insert breakpoint %d.\n", |
| 1696 | bl->owner->number); |
| 1697 | fprintf_unfiltered (tmp_error_stream, |
| 1698 | "Temporarily disabling shared " |
| 1699 | "library breakpoints:\n"); |
| 1700 | } |
| 1701 | *disabled_breaks = 1; |
| 1702 | fprintf_unfiltered (tmp_error_stream, |
| 1703 | "breakpoint #%d\n", bl->owner->number); |
| 1704 | } |
| 1705 | else |
| 1706 | { |
| 1707 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 1708 | { |
| 1709 | *hw_breakpoint_error = 1; |
| 1710 | fprintf_unfiltered (tmp_error_stream, |
| 1711 | "Cannot insert hardware " |
| 1712 | "breakpoint %d.\n", |
| 1713 | bl->owner->number); |
| 1714 | } |
| 1715 | else |
| 1716 | { |
| 1717 | fprintf_unfiltered (tmp_error_stream, |
| 1718 | "Cannot insert breakpoint %d.\n", |
| 1719 | bl->owner->number); |
| 1720 | fprintf_filtered (tmp_error_stream, |
| 1721 | "Error accessing memory address "); |
| 1722 | fputs_filtered (paddress (bl->gdbarch, bl->address), |
| 1723 | tmp_error_stream); |
| 1724 | fprintf_filtered (tmp_error_stream, ": %s.\n", |
| 1725 | safe_strerror (val)); |
| 1726 | } |
| 1727 | |
| 1728 | } |
| 1729 | } |
| 1730 | else |
| 1731 | bl->inserted = 1; |
| 1732 | |
| 1733 | return val; |
| 1734 | } |
| 1735 | |
| 1736 | else if (bl->loc_type == bp_loc_hardware_watchpoint |
| 1737 | /* NOTE drow/2003-09-08: This state only exists for removing |
| 1738 | watchpoints. It's not clear that it's necessary... */ |
| 1739 | && bl->owner->disposition != disp_del_at_next_stop) |
| 1740 | { |
| 1741 | gdb_assert (bl->owner->ops != NULL |
| 1742 | && bl->owner->ops->insert_location != NULL); |
| 1743 | |
| 1744 | val = bl->owner->ops->insert_location (bl); |
| 1745 | |
| 1746 | /* If trying to set a read-watchpoint, and it turns out it's not |
| 1747 | supported, try emulating one with an access watchpoint. */ |
| 1748 | if (val == 1 && bl->watchpoint_type == hw_read) |
| 1749 | { |
| 1750 | struct bp_location *loc, **loc_temp; |
| 1751 | |
| 1752 | /* But don't try to insert it, if there's already another |
| 1753 | hw_access location that would be considered a duplicate |
| 1754 | of this one. */ |
| 1755 | ALL_BP_LOCATIONS (loc, loc_temp) |
| 1756 | if (loc != bl |
| 1757 | && loc->watchpoint_type == hw_access |
| 1758 | && watchpoint_locations_match (bl, loc)) |
| 1759 | { |
| 1760 | bl->duplicate = 1; |
| 1761 | bl->inserted = 1; |
| 1762 | bl->target_info = loc->target_info; |
| 1763 | bl->watchpoint_type = hw_access; |
| 1764 | val = 0; |
| 1765 | break; |
| 1766 | } |
| 1767 | |
| 1768 | if (val == 1) |
| 1769 | { |
| 1770 | bl->watchpoint_type = hw_access; |
| 1771 | val = bl->owner->ops->insert_location (bl); |
| 1772 | |
| 1773 | if (val) |
| 1774 | /* Back to the original value. */ |
| 1775 | bl->watchpoint_type = hw_read; |
| 1776 | } |
| 1777 | } |
| 1778 | |
| 1779 | bl->inserted = (val == 0); |
| 1780 | } |
| 1781 | |
| 1782 | else if (bl->owner->type == bp_catchpoint) |
| 1783 | { |
| 1784 | gdb_assert (bl->owner->ops != NULL |
| 1785 | && bl->owner->ops->insert_location != NULL); |
| 1786 | |
| 1787 | val = bl->owner->ops->insert_location (bl); |
| 1788 | if (val) |
| 1789 | { |
| 1790 | bl->owner->enable_state = bp_disabled; |
| 1791 | |
| 1792 | if (val == 1) |
| 1793 | warning (_("\ |
| 1794 | Error inserting catchpoint %d: Your system does not support this type\n\ |
| 1795 | of catchpoint."), bl->owner->number); |
| 1796 | else |
| 1797 | warning (_("Error inserting catchpoint %d."), bl->owner->number); |
| 1798 | } |
| 1799 | |
| 1800 | bl->inserted = (val == 0); |
| 1801 | |
| 1802 | /* We've already printed an error message if there was a problem |
| 1803 | inserting this catchpoint, and we've disabled the catchpoint, |
| 1804 | so just return success. */ |
| 1805 | return 0; |
| 1806 | } |
| 1807 | |
| 1808 | return 0; |
| 1809 | } |
| 1810 | |
| 1811 | /* This function is called when program space PSPACE is about to be |
| 1812 | deleted. It takes care of updating breakpoints to not reference |
| 1813 | PSPACE anymore. */ |
| 1814 | |
| 1815 | void |
| 1816 | breakpoint_program_space_exit (struct program_space *pspace) |
| 1817 | { |
| 1818 | struct breakpoint *b, *b_temp; |
| 1819 | struct bp_location *loc, **loc_temp; |
| 1820 | |
| 1821 | /* Remove any breakpoint that was set through this program space. */ |
| 1822 | ALL_BREAKPOINTS_SAFE (b, b_temp) |
| 1823 | { |
| 1824 | if (b->pspace == pspace) |
| 1825 | delete_breakpoint (b); |
| 1826 | } |
| 1827 | |
| 1828 | /* Breakpoints set through other program spaces could have locations |
| 1829 | bound to PSPACE as well. Remove those. */ |
| 1830 | ALL_BP_LOCATIONS (loc, loc_temp) |
| 1831 | { |
| 1832 | struct bp_location *tmp; |
| 1833 | |
| 1834 | if (loc->pspace == pspace) |
| 1835 | { |
| 1836 | /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */ |
| 1837 | if (loc->owner->loc == loc) |
| 1838 | loc->owner->loc = loc->next; |
| 1839 | else |
| 1840 | for (tmp = loc->owner->loc; tmp->next != NULL; tmp = tmp->next) |
| 1841 | if (tmp->next == loc) |
| 1842 | { |
| 1843 | tmp->next = loc->next; |
| 1844 | break; |
| 1845 | } |
| 1846 | } |
| 1847 | } |
| 1848 | |
| 1849 | /* Now update the global location list to permanently delete the |
| 1850 | removed locations above. */ |
| 1851 | update_global_location_list (0); |
| 1852 | } |
| 1853 | |
| 1854 | /* Make sure all breakpoints are inserted in inferior. |
| 1855 | Throws exception on any error. |
| 1856 | A breakpoint that is already inserted won't be inserted |
| 1857 | again, so calling this function twice is safe. */ |
| 1858 | void |
| 1859 | insert_breakpoints (void) |
| 1860 | { |
| 1861 | struct breakpoint *bpt; |
| 1862 | |
| 1863 | ALL_BREAKPOINTS (bpt) |
| 1864 | if (is_hardware_watchpoint (bpt)) |
| 1865 | update_watchpoint (bpt, 0 /* don't reparse. */); |
| 1866 | |
| 1867 | update_global_location_list (1); |
| 1868 | |
| 1869 | /* update_global_location_list does not insert breakpoints when |
| 1870 | always_inserted_mode is not enabled. Explicitly insert them |
| 1871 | now. */ |
| 1872 | if (!breakpoints_always_inserted_mode ()) |
| 1873 | insert_breakpoint_locations (); |
| 1874 | } |
| 1875 | |
| 1876 | /* insert_breakpoints is used when starting or continuing the program. |
| 1877 | remove_breakpoints is used when the program stops. |
| 1878 | Both return zero if successful, |
| 1879 | or an `errno' value if could not write the inferior. */ |
| 1880 | |
| 1881 | static void |
| 1882 | insert_breakpoint_locations (void) |
| 1883 | { |
| 1884 | struct breakpoint *bpt; |
| 1885 | struct bp_location *bl, **blp_tmp; |
| 1886 | int error = 0; |
| 1887 | int val = 0; |
| 1888 | int disabled_breaks = 0; |
| 1889 | int hw_breakpoint_error = 0; |
| 1890 | |
| 1891 | struct ui_file *tmp_error_stream = mem_fileopen (); |
| 1892 | struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_error_stream); |
| 1893 | |
| 1894 | /* Explicitly mark the warning -- this will only be printed if |
| 1895 | there was an error. */ |
| 1896 | fprintf_unfiltered (tmp_error_stream, "Warning:\n"); |
| 1897 | |
| 1898 | save_current_space_and_thread (); |
| 1899 | |
| 1900 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 1901 | { |
| 1902 | if (!should_be_inserted (bl) || bl->inserted) |
| 1903 | continue; |
| 1904 | |
| 1905 | /* There is no point inserting thread-specific breakpoints if |
| 1906 | the thread no longer exists. ALL_BP_LOCATIONS bp_location |
| 1907 | has BL->OWNER always non-NULL. */ |
| 1908 | if (bl->owner->thread != -1 |
| 1909 | && !valid_thread_id (bl->owner->thread)) |
| 1910 | continue; |
| 1911 | |
| 1912 | switch_to_program_space_and_thread (bl->pspace); |
| 1913 | |
| 1914 | /* For targets that support global breakpoints, there's no need |
| 1915 | to select an inferior to insert breakpoint to. In fact, even |
| 1916 | if we aren't attached to any process yet, we should still |
| 1917 | insert breakpoints. */ |
| 1918 | if (!gdbarch_has_global_breakpoints (target_gdbarch) |
| 1919 | && ptid_equal (inferior_ptid, null_ptid)) |
| 1920 | continue; |
| 1921 | |
| 1922 | val = insert_bp_location (bl, tmp_error_stream, &disabled_breaks, |
| 1923 | &hw_breakpoint_error); |
| 1924 | if (val) |
| 1925 | error = val; |
| 1926 | } |
| 1927 | |
| 1928 | /* If we failed to insert all locations of a watchpoint, remove |
| 1929 | them, as half-inserted watchpoint is of limited use. */ |
| 1930 | ALL_BREAKPOINTS (bpt) |
| 1931 | { |
| 1932 | int some_failed = 0; |
| 1933 | struct bp_location *loc; |
| 1934 | |
| 1935 | if (!is_hardware_watchpoint (bpt)) |
| 1936 | continue; |
| 1937 | |
| 1938 | if (!breakpoint_enabled (bpt)) |
| 1939 | continue; |
| 1940 | |
| 1941 | if (bpt->disposition == disp_del_at_next_stop) |
| 1942 | continue; |
| 1943 | |
| 1944 | for (loc = bpt->loc; loc; loc = loc->next) |
| 1945 | if (!loc->inserted && should_be_inserted (loc)) |
| 1946 | { |
| 1947 | some_failed = 1; |
| 1948 | break; |
| 1949 | } |
| 1950 | if (some_failed) |
| 1951 | { |
| 1952 | for (loc = bpt->loc; loc; loc = loc->next) |
| 1953 | if (loc->inserted) |
| 1954 | remove_breakpoint (loc, mark_uninserted); |
| 1955 | |
| 1956 | hw_breakpoint_error = 1; |
| 1957 | fprintf_unfiltered (tmp_error_stream, |
| 1958 | "Could not insert hardware watchpoint %d.\n", |
| 1959 | bpt->number); |
| 1960 | error = -1; |
| 1961 | } |
| 1962 | } |
| 1963 | |
| 1964 | if (error) |
| 1965 | { |
| 1966 | /* If a hardware breakpoint or watchpoint was inserted, add a |
| 1967 | message about possibly exhausted resources. */ |
| 1968 | if (hw_breakpoint_error) |
| 1969 | { |
| 1970 | fprintf_unfiltered (tmp_error_stream, |
| 1971 | "Could not insert hardware breakpoints:\n\ |
| 1972 | You may have requested too many hardware breakpoints/watchpoints.\n"); |
| 1973 | } |
| 1974 | target_terminal_ours_for_output (); |
| 1975 | error_stream (tmp_error_stream); |
| 1976 | } |
| 1977 | |
| 1978 | do_cleanups (cleanups); |
| 1979 | } |
| 1980 | |
| 1981 | int |
| 1982 | remove_breakpoints (void) |
| 1983 | { |
| 1984 | struct bp_location *bl, **blp_tmp; |
| 1985 | int val = 0; |
| 1986 | |
| 1987 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 1988 | { |
| 1989 | if (bl->inserted) |
| 1990 | val |= remove_breakpoint (bl, mark_uninserted); |
| 1991 | } |
| 1992 | return val; |
| 1993 | } |
| 1994 | |
| 1995 | /* Remove breakpoints of process PID. */ |
| 1996 | |
| 1997 | int |
| 1998 | remove_breakpoints_pid (int pid) |
| 1999 | { |
| 2000 | struct bp_location *bl, **blp_tmp; |
| 2001 | int val; |
| 2002 | struct inferior *inf = find_inferior_pid (pid); |
| 2003 | |
| 2004 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2005 | { |
| 2006 | if (bl->pspace != inf->pspace) |
| 2007 | continue; |
| 2008 | |
| 2009 | if (bl->inserted) |
| 2010 | { |
| 2011 | val = remove_breakpoint (bl, mark_uninserted); |
| 2012 | if (val != 0) |
| 2013 | return val; |
| 2014 | } |
| 2015 | } |
| 2016 | return 0; |
| 2017 | } |
| 2018 | |
| 2019 | int |
| 2020 | reattach_breakpoints (int pid) |
| 2021 | { |
| 2022 | struct cleanup *old_chain; |
| 2023 | struct bp_location *bl, **blp_tmp; |
| 2024 | int val; |
| 2025 | struct ui_file *tmp_error_stream; |
| 2026 | int dummy1 = 0, dummy2 = 0; |
| 2027 | struct inferior *inf; |
| 2028 | struct thread_info *tp; |
| 2029 | |
| 2030 | tp = any_live_thread_of_process (pid); |
| 2031 | if (tp == NULL) |
| 2032 | return 1; |
| 2033 | |
| 2034 | inf = find_inferior_pid (pid); |
| 2035 | old_chain = save_inferior_ptid (); |
| 2036 | |
| 2037 | inferior_ptid = tp->ptid; |
| 2038 | |
| 2039 | tmp_error_stream = mem_fileopen (); |
| 2040 | make_cleanup_ui_file_delete (tmp_error_stream); |
| 2041 | |
| 2042 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2043 | { |
| 2044 | if (bl->pspace != inf->pspace) |
| 2045 | continue; |
| 2046 | |
| 2047 | if (bl->inserted) |
| 2048 | { |
| 2049 | bl->inserted = 0; |
| 2050 | val = insert_bp_location (bl, tmp_error_stream, &dummy1, &dummy2); |
| 2051 | if (val != 0) |
| 2052 | { |
| 2053 | do_cleanups (old_chain); |
| 2054 | return val; |
| 2055 | } |
| 2056 | } |
| 2057 | } |
| 2058 | do_cleanups (old_chain); |
| 2059 | return 0; |
| 2060 | } |
| 2061 | |
| 2062 | static int internal_breakpoint_number = -1; |
| 2063 | |
| 2064 | /* Set the breakpoint number of B, depending on the value of INTERNAL. |
| 2065 | If INTERNAL is non-zero, the breakpoint number will be populated |
| 2066 | from internal_breakpoint_number and that variable decremented. |
| 2067 | Otherwis the breakpoint number will be populated from |
| 2068 | breakpoint_count and that value incremented. Internal breakpoints |
| 2069 | do not set the internal var bpnum. */ |
| 2070 | static void |
| 2071 | set_breakpoint_number (int internal, struct breakpoint *b) |
| 2072 | { |
| 2073 | if (internal) |
| 2074 | b->number = internal_breakpoint_number--; |
| 2075 | else |
| 2076 | { |
| 2077 | set_breakpoint_count (breakpoint_count + 1); |
| 2078 | b->number = breakpoint_count; |
| 2079 | } |
| 2080 | } |
| 2081 | |
| 2082 | static struct breakpoint * |
| 2083 | create_internal_breakpoint (struct gdbarch *gdbarch, |
| 2084 | CORE_ADDR address, enum bptype type) |
| 2085 | { |
| 2086 | struct symtab_and_line sal; |
| 2087 | struct breakpoint *b; |
| 2088 | |
| 2089 | init_sal (&sal); /* Initialize to zeroes. */ |
| 2090 | |
| 2091 | sal.pc = address; |
| 2092 | sal.section = find_pc_overlay (sal.pc); |
| 2093 | sal.pspace = current_program_space; |
| 2094 | |
| 2095 | b = set_raw_breakpoint (gdbarch, sal, type); |
| 2096 | b->number = internal_breakpoint_number--; |
| 2097 | b->disposition = disp_donttouch; |
| 2098 | |
| 2099 | return b; |
| 2100 | } |
| 2101 | |
| 2102 | static const char *const longjmp_names[] = |
| 2103 | { |
| 2104 | "longjmp", "_longjmp", "siglongjmp", "_siglongjmp" |
| 2105 | }; |
| 2106 | #define NUM_LONGJMP_NAMES ARRAY_SIZE(longjmp_names) |
| 2107 | |
| 2108 | /* Per-objfile data private to breakpoint.c. */ |
| 2109 | struct breakpoint_objfile_data |
| 2110 | { |
| 2111 | /* Minimal symbol for "_ovly_debug_event" (if any). */ |
| 2112 | struct minimal_symbol *overlay_msym; |
| 2113 | |
| 2114 | /* Minimal symbol(s) for "longjmp", "siglongjmp", etc. (if any). */ |
| 2115 | struct minimal_symbol *longjmp_msym[NUM_LONGJMP_NAMES]; |
| 2116 | |
| 2117 | /* Minimal symbol for "std::terminate()" (if any). */ |
| 2118 | struct minimal_symbol *terminate_msym; |
| 2119 | |
| 2120 | /* Minimal symbol for "_Unwind_DebugHook" (if any). */ |
| 2121 | struct minimal_symbol *exception_msym; |
| 2122 | }; |
| 2123 | |
| 2124 | static const struct objfile_data *breakpoint_objfile_key; |
| 2125 | |
| 2126 | /* Minimal symbol not found sentinel. */ |
| 2127 | static struct minimal_symbol msym_not_found; |
| 2128 | |
| 2129 | /* Returns TRUE if MSYM point to the "not found" sentinel. */ |
| 2130 | |
| 2131 | static int |
| 2132 | msym_not_found_p (const struct minimal_symbol *msym) |
| 2133 | { |
| 2134 | return msym == &msym_not_found; |
| 2135 | } |
| 2136 | |
| 2137 | /* Return per-objfile data needed by breakpoint.c. |
| 2138 | Allocate the data if necessary. */ |
| 2139 | |
| 2140 | static struct breakpoint_objfile_data * |
| 2141 | get_breakpoint_objfile_data (struct objfile *objfile) |
| 2142 | { |
| 2143 | struct breakpoint_objfile_data *bp_objfile_data; |
| 2144 | |
| 2145 | bp_objfile_data = objfile_data (objfile, breakpoint_objfile_key); |
| 2146 | if (bp_objfile_data == NULL) |
| 2147 | { |
| 2148 | bp_objfile_data = obstack_alloc (&objfile->objfile_obstack, |
| 2149 | sizeof (*bp_objfile_data)); |
| 2150 | |
| 2151 | memset (bp_objfile_data, 0, sizeof (*bp_objfile_data)); |
| 2152 | set_objfile_data (objfile, breakpoint_objfile_key, bp_objfile_data); |
| 2153 | } |
| 2154 | return bp_objfile_data; |
| 2155 | } |
| 2156 | |
| 2157 | static void |
| 2158 | create_overlay_event_breakpoint (void) |
| 2159 | { |
| 2160 | struct objfile *objfile; |
| 2161 | const char *const func_name = "_ovly_debug_event"; |
| 2162 | |
| 2163 | ALL_OBJFILES (objfile) |
| 2164 | { |
| 2165 | struct breakpoint *b; |
| 2166 | struct breakpoint_objfile_data *bp_objfile_data; |
| 2167 | CORE_ADDR addr; |
| 2168 | |
| 2169 | bp_objfile_data = get_breakpoint_objfile_data (objfile); |
| 2170 | |
| 2171 | if (msym_not_found_p (bp_objfile_data->overlay_msym)) |
| 2172 | continue; |
| 2173 | |
| 2174 | if (bp_objfile_data->overlay_msym == NULL) |
| 2175 | { |
| 2176 | struct minimal_symbol *m; |
| 2177 | |
| 2178 | m = lookup_minimal_symbol_text (func_name, objfile); |
| 2179 | if (m == NULL) |
| 2180 | { |
| 2181 | /* Avoid future lookups in this objfile. */ |
| 2182 | bp_objfile_data->overlay_msym = &msym_not_found; |
| 2183 | continue; |
| 2184 | } |
| 2185 | bp_objfile_data->overlay_msym = m; |
| 2186 | } |
| 2187 | |
| 2188 | addr = SYMBOL_VALUE_ADDRESS (bp_objfile_data->overlay_msym); |
| 2189 | b = create_internal_breakpoint (get_objfile_arch (objfile), addr, |
| 2190 | bp_overlay_event); |
| 2191 | b->addr_string = xstrdup (func_name); |
| 2192 | |
| 2193 | if (overlay_debugging == ovly_auto) |
| 2194 | { |
| 2195 | b->enable_state = bp_enabled; |
| 2196 | overlay_events_enabled = 1; |
| 2197 | } |
| 2198 | else |
| 2199 | { |
| 2200 | b->enable_state = bp_disabled; |
| 2201 | overlay_events_enabled = 0; |
| 2202 | } |
| 2203 | } |
| 2204 | update_global_location_list (1); |
| 2205 | } |
| 2206 | |
| 2207 | static void |
| 2208 | create_longjmp_master_breakpoint (void) |
| 2209 | { |
| 2210 | struct program_space *pspace; |
| 2211 | struct cleanup *old_chain; |
| 2212 | |
| 2213 | old_chain = save_current_program_space (); |
| 2214 | |
| 2215 | ALL_PSPACES (pspace) |
| 2216 | { |
| 2217 | struct objfile *objfile; |
| 2218 | |
| 2219 | set_current_program_space (pspace); |
| 2220 | |
| 2221 | ALL_OBJFILES (objfile) |
| 2222 | { |
| 2223 | int i; |
| 2224 | struct gdbarch *gdbarch; |
| 2225 | struct breakpoint_objfile_data *bp_objfile_data; |
| 2226 | |
| 2227 | gdbarch = get_objfile_arch (objfile); |
| 2228 | if (!gdbarch_get_longjmp_target_p (gdbarch)) |
| 2229 | continue; |
| 2230 | |
| 2231 | bp_objfile_data = get_breakpoint_objfile_data (objfile); |
| 2232 | |
| 2233 | for (i = 0; i < NUM_LONGJMP_NAMES; i++) |
| 2234 | { |
| 2235 | struct breakpoint *b; |
| 2236 | const char *func_name; |
| 2237 | CORE_ADDR addr; |
| 2238 | |
| 2239 | if (msym_not_found_p (bp_objfile_data->longjmp_msym[i])) |
| 2240 | continue; |
| 2241 | |
| 2242 | func_name = longjmp_names[i]; |
| 2243 | if (bp_objfile_data->longjmp_msym[i] == NULL) |
| 2244 | { |
| 2245 | struct minimal_symbol *m; |
| 2246 | |
| 2247 | m = lookup_minimal_symbol_text (func_name, objfile); |
| 2248 | if (m == NULL) |
| 2249 | { |
| 2250 | /* Prevent future lookups in this objfile. */ |
| 2251 | bp_objfile_data->longjmp_msym[i] = &msym_not_found; |
| 2252 | continue; |
| 2253 | } |
| 2254 | bp_objfile_data->longjmp_msym[i] = m; |
| 2255 | } |
| 2256 | |
| 2257 | addr = SYMBOL_VALUE_ADDRESS (bp_objfile_data->longjmp_msym[i]); |
| 2258 | b = create_internal_breakpoint (gdbarch, addr, bp_longjmp_master); |
| 2259 | b->addr_string = xstrdup (func_name); |
| 2260 | b->enable_state = bp_disabled; |
| 2261 | } |
| 2262 | } |
| 2263 | } |
| 2264 | update_global_location_list (1); |
| 2265 | |
| 2266 | do_cleanups (old_chain); |
| 2267 | } |
| 2268 | |
| 2269 | /* Create a master std::terminate breakpoint. */ |
| 2270 | static void |
| 2271 | create_std_terminate_master_breakpoint (void) |
| 2272 | { |
| 2273 | struct program_space *pspace; |
| 2274 | struct cleanup *old_chain; |
| 2275 | const char *const func_name = "std::terminate()"; |
| 2276 | |
| 2277 | old_chain = save_current_program_space (); |
| 2278 | |
| 2279 | ALL_PSPACES (pspace) |
| 2280 | { |
| 2281 | struct objfile *objfile; |
| 2282 | CORE_ADDR addr; |
| 2283 | |
| 2284 | set_current_program_space (pspace); |
| 2285 | |
| 2286 | ALL_OBJFILES (objfile) |
| 2287 | { |
| 2288 | struct breakpoint *b; |
| 2289 | struct breakpoint_objfile_data *bp_objfile_data; |
| 2290 | |
| 2291 | bp_objfile_data = get_breakpoint_objfile_data (objfile); |
| 2292 | |
| 2293 | if (msym_not_found_p (bp_objfile_data->terminate_msym)) |
| 2294 | continue; |
| 2295 | |
| 2296 | if (bp_objfile_data->terminate_msym == NULL) |
| 2297 | { |
| 2298 | struct minimal_symbol *m; |
| 2299 | |
| 2300 | m = lookup_minimal_symbol (func_name, NULL, objfile); |
| 2301 | if (m == NULL || (MSYMBOL_TYPE (m) != mst_text |
| 2302 | && MSYMBOL_TYPE (m) != mst_file_text)) |
| 2303 | { |
| 2304 | /* Prevent future lookups in this objfile. */ |
| 2305 | bp_objfile_data->terminate_msym = &msym_not_found; |
| 2306 | continue; |
| 2307 | } |
| 2308 | bp_objfile_data->terminate_msym = m; |
| 2309 | } |
| 2310 | |
| 2311 | addr = SYMBOL_VALUE_ADDRESS (bp_objfile_data->terminate_msym); |
| 2312 | b = create_internal_breakpoint (get_objfile_arch (objfile), addr, |
| 2313 | bp_std_terminate_master); |
| 2314 | b->addr_string = xstrdup (func_name); |
| 2315 | b->enable_state = bp_disabled; |
| 2316 | } |
| 2317 | } |
| 2318 | |
| 2319 | update_global_location_list (1); |
| 2320 | |
| 2321 | do_cleanups (old_chain); |
| 2322 | } |
| 2323 | |
| 2324 | /* Install a master breakpoint on the unwinder's debug hook. */ |
| 2325 | |
| 2326 | void |
| 2327 | create_exception_master_breakpoint (void) |
| 2328 | { |
| 2329 | struct objfile *objfile; |
| 2330 | const char *const func_name = "_Unwind_DebugHook"; |
| 2331 | |
| 2332 | ALL_OBJFILES (objfile) |
| 2333 | { |
| 2334 | struct breakpoint *b; |
| 2335 | struct gdbarch *gdbarch; |
| 2336 | struct breakpoint_objfile_data *bp_objfile_data; |
| 2337 | CORE_ADDR addr; |
| 2338 | |
| 2339 | bp_objfile_data = get_breakpoint_objfile_data (objfile); |
| 2340 | |
| 2341 | if (msym_not_found_p (bp_objfile_data->exception_msym)) |
| 2342 | continue; |
| 2343 | |
| 2344 | gdbarch = get_objfile_arch (objfile); |
| 2345 | |
| 2346 | if (bp_objfile_data->exception_msym == NULL) |
| 2347 | { |
| 2348 | struct minimal_symbol *debug_hook; |
| 2349 | |
| 2350 | debug_hook = lookup_minimal_symbol (func_name, NULL, objfile); |
| 2351 | if (debug_hook == NULL) |
| 2352 | { |
| 2353 | bp_objfile_data->exception_msym = &msym_not_found; |
| 2354 | continue; |
| 2355 | } |
| 2356 | |
| 2357 | bp_objfile_data->exception_msym = debug_hook; |
| 2358 | } |
| 2359 | |
| 2360 | addr = SYMBOL_VALUE_ADDRESS (bp_objfile_data->exception_msym); |
| 2361 | addr = gdbarch_convert_from_func_ptr_addr (gdbarch, addr, |
| 2362 | ¤t_target); |
| 2363 | b = create_internal_breakpoint (gdbarch, addr, bp_exception_master); |
| 2364 | b->addr_string = xstrdup (func_name); |
| 2365 | b->enable_state = bp_disabled; |
| 2366 | } |
| 2367 | |
| 2368 | update_global_location_list (1); |
| 2369 | } |
| 2370 | |
| 2371 | void |
| 2372 | update_breakpoints_after_exec (void) |
| 2373 | { |
| 2374 | struct breakpoint *b, *b_tmp; |
| 2375 | struct bp_location *bploc, **bplocp_tmp; |
| 2376 | |
| 2377 | /* We're about to delete breakpoints from GDB's lists. If the |
| 2378 | INSERTED flag is true, GDB will try to lift the breakpoints by |
| 2379 | writing the breakpoints' "shadow contents" back into memory. The |
| 2380 | "shadow contents" are NOT valid after an exec, so GDB should not |
| 2381 | do that. Instead, the target is responsible from marking |
| 2382 | breakpoints out as soon as it detects an exec. We don't do that |
| 2383 | here instead, because there may be other attempts to delete |
| 2384 | breakpoints after detecting an exec and before reaching here. */ |
| 2385 | ALL_BP_LOCATIONS (bploc, bplocp_tmp) |
| 2386 | if (bploc->pspace == current_program_space) |
| 2387 | gdb_assert (!bploc->inserted); |
| 2388 | |
| 2389 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 2390 | { |
| 2391 | if (b->pspace != current_program_space) |
| 2392 | continue; |
| 2393 | |
| 2394 | /* Solib breakpoints must be explicitly reset after an exec(). */ |
| 2395 | if (b->type == bp_shlib_event) |
| 2396 | { |
| 2397 | delete_breakpoint (b); |
| 2398 | continue; |
| 2399 | } |
| 2400 | |
| 2401 | /* JIT breakpoints must be explicitly reset after an exec(). */ |
| 2402 | if (b->type == bp_jit_event) |
| 2403 | { |
| 2404 | delete_breakpoint (b); |
| 2405 | continue; |
| 2406 | } |
| 2407 | |
| 2408 | /* Thread event breakpoints must be set anew after an exec(), |
| 2409 | as must overlay event and longjmp master breakpoints. */ |
| 2410 | if (b->type == bp_thread_event || b->type == bp_overlay_event |
| 2411 | || b->type == bp_longjmp_master || b->type == bp_std_terminate_master |
| 2412 | || b->type == bp_exception_master) |
| 2413 | { |
| 2414 | delete_breakpoint (b); |
| 2415 | continue; |
| 2416 | } |
| 2417 | |
| 2418 | /* Step-resume breakpoints are meaningless after an exec(). */ |
| 2419 | if (b->type == bp_step_resume || b->type == bp_hp_step_resume) |
| 2420 | { |
| 2421 | delete_breakpoint (b); |
| 2422 | continue; |
| 2423 | } |
| 2424 | |
| 2425 | /* Longjmp and longjmp-resume breakpoints are also meaningless |
| 2426 | after an exec. */ |
| 2427 | if (b->type == bp_longjmp || b->type == bp_longjmp_resume |
| 2428 | || b->type == bp_exception || b->type == bp_exception_resume) |
| 2429 | { |
| 2430 | delete_breakpoint (b); |
| 2431 | continue; |
| 2432 | } |
| 2433 | |
| 2434 | if (b->type == bp_catchpoint) |
| 2435 | { |
| 2436 | /* For now, none of the bp_catchpoint breakpoints need to |
| 2437 | do anything at this point. In the future, if some of |
| 2438 | the catchpoints need to something, we will need to add |
| 2439 | a new method, and call this method from here. */ |
| 2440 | continue; |
| 2441 | } |
| 2442 | |
| 2443 | /* bp_finish is a special case. The only way we ought to be able |
| 2444 | to see one of these when an exec() has happened, is if the user |
| 2445 | caught a vfork, and then said "finish". Ordinarily a finish just |
| 2446 | carries them to the call-site of the current callee, by setting |
| 2447 | a temporary bp there and resuming. But in this case, the finish |
| 2448 | will carry them entirely through the vfork & exec. |
| 2449 | |
| 2450 | We don't want to allow a bp_finish to remain inserted now. But |
| 2451 | we can't safely delete it, 'cause finish_command has a handle to |
| 2452 | the bp on a bpstat, and will later want to delete it. There's a |
| 2453 | chance (and I've seen it happen) that if we delete the bp_finish |
| 2454 | here, that its storage will get reused by the time finish_command |
| 2455 | gets 'round to deleting the "use to be a bp_finish" breakpoint. |
| 2456 | We really must allow finish_command to delete a bp_finish. |
| 2457 | |
| 2458 | In the absense of a general solution for the "how do we know |
| 2459 | it's safe to delete something others may have handles to?" |
| 2460 | problem, what we'll do here is just uninsert the bp_finish, and |
| 2461 | let finish_command delete it. |
| 2462 | |
| 2463 | (We know the bp_finish is "doomed" in the sense that it's |
| 2464 | momentary, and will be deleted as soon as finish_command sees |
| 2465 | the inferior stopped. So it doesn't matter that the bp's |
| 2466 | address is probably bogus in the new a.out, unlike e.g., the |
| 2467 | solib breakpoints.) */ |
| 2468 | |
| 2469 | if (b->type == bp_finish) |
| 2470 | { |
| 2471 | continue; |
| 2472 | } |
| 2473 | |
| 2474 | /* Without a symbolic address, we have little hope of the |
| 2475 | pre-exec() address meaning the same thing in the post-exec() |
| 2476 | a.out. */ |
| 2477 | if (b->addr_string == NULL) |
| 2478 | { |
| 2479 | delete_breakpoint (b); |
| 2480 | continue; |
| 2481 | } |
| 2482 | } |
| 2483 | /* FIXME what about longjmp breakpoints? Re-create them here? */ |
| 2484 | create_overlay_event_breakpoint (); |
| 2485 | create_longjmp_master_breakpoint (); |
| 2486 | create_std_terminate_master_breakpoint (); |
| 2487 | create_exception_master_breakpoint (); |
| 2488 | } |
| 2489 | |
| 2490 | int |
| 2491 | detach_breakpoints (int pid) |
| 2492 | { |
| 2493 | struct bp_location *bl, **blp_tmp; |
| 2494 | int val = 0; |
| 2495 | struct cleanup *old_chain = save_inferior_ptid (); |
| 2496 | struct inferior *inf = current_inferior (); |
| 2497 | |
| 2498 | if (pid == PIDGET (inferior_ptid)) |
| 2499 | error (_("Cannot detach breakpoints of inferior_ptid")); |
| 2500 | |
| 2501 | /* Set inferior_ptid; remove_breakpoint_1 uses this global. */ |
| 2502 | inferior_ptid = pid_to_ptid (pid); |
| 2503 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2504 | { |
| 2505 | if (bl->pspace != inf->pspace) |
| 2506 | continue; |
| 2507 | |
| 2508 | if (bl->inserted) |
| 2509 | val |= remove_breakpoint_1 (bl, mark_inserted); |
| 2510 | } |
| 2511 | |
| 2512 | /* Detach single-step breakpoints as well. */ |
| 2513 | detach_single_step_breakpoints (); |
| 2514 | |
| 2515 | do_cleanups (old_chain); |
| 2516 | return val; |
| 2517 | } |
| 2518 | |
| 2519 | /* Remove the breakpoint location BL from the current address space. |
| 2520 | Note that this is used to detach breakpoints from a child fork. |
| 2521 | When we get here, the child isn't in the inferior list, and neither |
| 2522 | do we have objects to represent its address space --- we should |
| 2523 | *not* look at bl->pspace->aspace here. */ |
| 2524 | |
| 2525 | static int |
| 2526 | remove_breakpoint_1 (struct bp_location *bl, insertion_state_t is) |
| 2527 | { |
| 2528 | int val; |
| 2529 | |
| 2530 | /* BL is never in moribund_locations by our callers. */ |
| 2531 | gdb_assert (bl->owner != NULL); |
| 2532 | |
| 2533 | if (bl->owner->enable_state == bp_permanent) |
| 2534 | /* Permanent breakpoints cannot be inserted or removed. */ |
| 2535 | return 0; |
| 2536 | |
| 2537 | /* The type of none suggests that owner is actually deleted. |
| 2538 | This should not ever happen. */ |
| 2539 | gdb_assert (bl->owner->type != bp_none); |
| 2540 | |
| 2541 | if (bl->loc_type == bp_loc_software_breakpoint |
| 2542 | || bl->loc_type == bp_loc_hardware_breakpoint) |
| 2543 | { |
| 2544 | /* "Normal" instruction breakpoint: either the standard |
| 2545 | trap-instruction bp (bp_breakpoint), or a |
| 2546 | bp_hardware_breakpoint. */ |
| 2547 | |
| 2548 | /* First check to see if we have to handle an overlay. */ |
| 2549 | if (overlay_debugging == ovly_off |
| 2550 | || bl->section == NULL |
| 2551 | || !(section_is_overlay (bl->section))) |
| 2552 | { |
| 2553 | /* No overlay handling: just remove the breakpoint. */ |
| 2554 | |
| 2555 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 2556 | val = target_remove_hw_breakpoint (bl->gdbarch, &bl->target_info); |
| 2557 | else |
| 2558 | val = target_remove_breakpoint (bl->gdbarch, &bl->target_info); |
| 2559 | } |
| 2560 | else |
| 2561 | { |
| 2562 | /* This breakpoint is in an overlay section. |
| 2563 | Did we set a breakpoint at the LMA? */ |
| 2564 | if (!overlay_events_enabled) |
| 2565 | { |
| 2566 | /* Yes -- overlay event support is not active, so we |
| 2567 | should have set a breakpoint at the LMA. Remove it. |
| 2568 | */ |
| 2569 | /* Ignore any failures: if the LMA is in ROM, we will |
| 2570 | have already warned when we failed to insert it. */ |
| 2571 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 2572 | target_remove_hw_breakpoint (bl->gdbarch, |
| 2573 | &bl->overlay_target_info); |
| 2574 | else |
| 2575 | target_remove_breakpoint (bl->gdbarch, |
| 2576 | &bl->overlay_target_info); |
| 2577 | } |
| 2578 | /* Did we set a breakpoint at the VMA? |
| 2579 | If so, we will have marked the breakpoint 'inserted'. */ |
| 2580 | if (bl->inserted) |
| 2581 | { |
| 2582 | /* Yes -- remove it. Previously we did not bother to |
| 2583 | remove the breakpoint if the section had been |
| 2584 | unmapped, but let's not rely on that being safe. We |
| 2585 | don't know what the overlay manager might do. */ |
| 2586 | if (bl->loc_type == bp_loc_hardware_breakpoint) |
| 2587 | val = target_remove_hw_breakpoint (bl->gdbarch, |
| 2588 | &bl->target_info); |
| 2589 | |
| 2590 | /* However, we should remove *software* breakpoints only |
| 2591 | if the section is still mapped, or else we overwrite |
| 2592 | wrong code with the saved shadow contents. */ |
| 2593 | else if (section_is_mapped (bl->section)) |
| 2594 | val = target_remove_breakpoint (bl->gdbarch, |
| 2595 | &bl->target_info); |
| 2596 | else |
| 2597 | val = 0; |
| 2598 | } |
| 2599 | else |
| 2600 | { |
| 2601 | /* No -- not inserted, so no need to remove. No error. */ |
| 2602 | val = 0; |
| 2603 | } |
| 2604 | } |
| 2605 | |
| 2606 | /* In some cases, we might not be able to remove a breakpoint |
| 2607 | in a shared library that has already been removed, but we |
| 2608 | have not yet processed the shlib unload event. */ |
| 2609 | if (val && solib_name_from_address (bl->pspace, bl->address)) |
| 2610 | val = 0; |
| 2611 | |
| 2612 | if (val) |
| 2613 | return val; |
| 2614 | bl->inserted = (is == mark_inserted); |
| 2615 | } |
| 2616 | else if (bl->loc_type == bp_loc_hardware_watchpoint) |
| 2617 | { |
| 2618 | gdb_assert (bl->owner->ops != NULL |
| 2619 | && bl->owner->ops->remove_location != NULL); |
| 2620 | |
| 2621 | bl->inserted = (is == mark_inserted); |
| 2622 | bl->owner->ops->remove_location (bl); |
| 2623 | |
| 2624 | /* Failure to remove any of the hardware watchpoints comes here. */ |
| 2625 | if ((is == mark_uninserted) && (bl->inserted)) |
| 2626 | warning (_("Could not remove hardware watchpoint %d."), |
| 2627 | bl->owner->number); |
| 2628 | } |
| 2629 | else if (bl->owner->type == bp_catchpoint |
| 2630 | && breakpoint_enabled (bl->owner) |
| 2631 | && !bl->duplicate) |
| 2632 | { |
| 2633 | gdb_assert (bl->owner->ops != NULL |
| 2634 | && bl->owner->ops->remove_location != NULL); |
| 2635 | |
| 2636 | val = bl->owner->ops->remove_location (bl); |
| 2637 | if (val) |
| 2638 | return val; |
| 2639 | |
| 2640 | bl->inserted = (is == mark_inserted); |
| 2641 | } |
| 2642 | |
| 2643 | return 0; |
| 2644 | } |
| 2645 | |
| 2646 | static int |
| 2647 | remove_breakpoint (struct bp_location *bl, insertion_state_t is) |
| 2648 | { |
| 2649 | int ret; |
| 2650 | struct cleanup *old_chain; |
| 2651 | |
| 2652 | /* BL is never in moribund_locations by our callers. */ |
| 2653 | gdb_assert (bl->owner != NULL); |
| 2654 | |
| 2655 | if (bl->owner->enable_state == bp_permanent) |
| 2656 | /* Permanent breakpoints cannot be inserted or removed. */ |
| 2657 | return 0; |
| 2658 | |
| 2659 | /* The type of none suggests that owner is actually deleted. |
| 2660 | This should not ever happen. */ |
| 2661 | gdb_assert (bl->owner->type != bp_none); |
| 2662 | |
| 2663 | old_chain = save_current_space_and_thread (); |
| 2664 | |
| 2665 | switch_to_program_space_and_thread (bl->pspace); |
| 2666 | |
| 2667 | ret = remove_breakpoint_1 (bl, is); |
| 2668 | |
| 2669 | do_cleanups (old_chain); |
| 2670 | return ret; |
| 2671 | } |
| 2672 | |
| 2673 | /* Clear the "inserted" flag in all breakpoints. */ |
| 2674 | |
| 2675 | void |
| 2676 | mark_breakpoints_out (void) |
| 2677 | { |
| 2678 | struct bp_location *bl, **blp_tmp; |
| 2679 | |
| 2680 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2681 | if (bl->pspace == current_program_space) |
| 2682 | bl->inserted = 0; |
| 2683 | } |
| 2684 | |
| 2685 | /* Clear the "inserted" flag in all breakpoints and delete any |
| 2686 | breakpoints which should go away between runs of the program. |
| 2687 | |
| 2688 | Plus other such housekeeping that has to be done for breakpoints |
| 2689 | between runs. |
| 2690 | |
| 2691 | Note: this function gets called at the end of a run (by |
| 2692 | generic_mourn_inferior) and when a run begins (by |
| 2693 | init_wait_for_inferior). */ |
| 2694 | |
| 2695 | |
| 2696 | |
| 2697 | void |
| 2698 | breakpoint_init_inferior (enum inf_context context) |
| 2699 | { |
| 2700 | struct breakpoint *b, *b_tmp; |
| 2701 | struct bp_location *bl, **blp_tmp; |
| 2702 | int ix; |
| 2703 | struct program_space *pspace = current_program_space; |
| 2704 | |
| 2705 | /* If breakpoint locations are shared across processes, then there's |
| 2706 | nothing to do. */ |
| 2707 | if (gdbarch_has_global_breakpoints (target_gdbarch)) |
| 2708 | return; |
| 2709 | |
| 2710 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2711 | { |
| 2712 | /* ALL_BP_LOCATIONS bp_location has BL->OWNER always non-NULL. */ |
| 2713 | if (bl->pspace == pspace |
| 2714 | && bl->owner->enable_state != bp_permanent) |
| 2715 | bl->inserted = 0; |
| 2716 | } |
| 2717 | |
| 2718 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 2719 | { |
| 2720 | if (b->loc && b->loc->pspace != pspace) |
| 2721 | continue; |
| 2722 | |
| 2723 | switch (b->type) |
| 2724 | { |
| 2725 | case bp_call_dummy: |
| 2726 | |
| 2727 | /* If the call dummy breakpoint is at the entry point it will |
| 2728 | cause problems when the inferior is rerun, so we better get |
| 2729 | rid of it. */ |
| 2730 | |
| 2731 | case bp_watchpoint_scope: |
| 2732 | |
| 2733 | /* Also get rid of scope breakpoints. */ |
| 2734 | |
| 2735 | case bp_shlib_event: |
| 2736 | |
| 2737 | /* Also remove solib event breakpoints. Their addresses may |
| 2738 | have changed since the last time we ran the program. |
| 2739 | Actually we may now be debugging against different target; |
| 2740 | and so the solib backend that installed this breakpoint may |
| 2741 | not be used in by the target. E.g., |
| 2742 | |
| 2743 | (gdb) file prog-linux |
| 2744 | (gdb) run # native linux target |
| 2745 | ... |
| 2746 | (gdb) kill |
| 2747 | (gdb) file prog-win.exe |
| 2748 | (gdb) tar rem :9999 # remote Windows gdbserver. |
| 2749 | */ |
| 2750 | |
| 2751 | delete_breakpoint (b); |
| 2752 | break; |
| 2753 | |
| 2754 | case bp_watchpoint: |
| 2755 | case bp_hardware_watchpoint: |
| 2756 | case bp_read_watchpoint: |
| 2757 | case bp_access_watchpoint: |
| 2758 | |
| 2759 | /* Likewise for watchpoints on local expressions. */ |
| 2760 | if (b->exp_valid_block != NULL) |
| 2761 | delete_breakpoint (b); |
| 2762 | else if (context == inf_starting) |
| 2763 | { |
| 2764 | /* Reset val field to force reread of starting value in |
| 2765 | insert_breakpoints. */ |
| 2766 | if (b->val) |
| 2767 | value_free (b->val); |
| 2768 | b->val = NULL; |
| 2769 | b->val_valid = 0; |
| 2770 | } |
| 2771 | break; |
| 2772 | default: |
| 2773 | break; |
| 2774 | } |
| 2775 | } |
| 2776 | |
| 2777 | /* Get rid of the moribund locations. */ |
| 2778 | for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, bl); ++ix) |
| 2779 | decref_bp_location (&bl); |
| 2780 | VEC_free (bp_location_p, moribund_locations); |
| 2781 | } |
| 2782 | |
| 2783 | /* These functions concern about actual breakpoints inserted in the |
| 2784 | target --- to e.g. check if we need to do decr_pc adjustment or if |
| 2785 | we need to hop over the bkpt --- so we check for address space |
| 2786 | match, not program space. */ |
| 2787 | |
| 2788 | /* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint |
| 2789 | exists at PC. It returns ordinary_breakpoint_here if it's an |
| 2790 | ordinary breakpoint, or permanent_breakpoint_here if it's a |
| 2791 | permanent breakpoint. |
| 2792 | - When continuing from a location with an ordinary breakpoint, we |
| 2793 | actually single step once before calling insert_breakpoints. |
| 2794 | - When continuing from a localion with a permanent breakpoint, we |
| 2795 | need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by |
| 2796 | the target, to advance the PC past the breakpoint. */ |
| 2797 | |
| 2798 | enum breakpoint_here |
| 2799 | breakpoint_here_p (struct address_space *aspace, CORE_ADDR pc) |
| 2800 | { |
| 2801 | struct bp_location *bl, **blp_tmp; |
| 2802 | int any_breakpoint_here = 0; |
| 2803 | |
| 2804 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2805 | { |
| 2806 | if (bl->loc_type != bp_loc_software_breakpoint |
| 2807 | && bl->loc_type != bp_loc_hardware_breakpoint) |
| 2808 | continue; |
| 2809 | |
| 2810 | /* ALL_BP_LOCATIONS bp_location has BL->OWNER always non-NULL. */ |
| 2811 | if ((breakpoint_enabled (bl->owner) |
| 2812 | || bl->owner->enable_state == bp_permanent) |
| 2813 | && breakpoint_location_address_match (bl, aspace, pc)) |
| 2814 | { |
| 2815 | if (overlay_debugging |
| 2816 | && section_is_overlay (bl->section) |
| 2817 | && !section_is_mapped (bl->section)) |
| 2818 | continue; /* unmapped overlay -- can't be a match */ |
| 2819 | else if (bl->owner->enable_state == bp_permanent) |
| 2820 | return permanent_breakpoint_here; |
| 2821 | else |
| 2822 | any_breakpoint_here = 1; |
| 2823 | } |
| 2824 | } |
| 2825 | |
| 2826 | return any_breakpoint_here ? ordinary_breakpoint_here : 0; |
| 2827 | } |
| 2828 | |
| 2829 | /* Return true if there's a moribund breakpoint at PC. */ |
| 2830 | |
| 2831 | int |
| 2832 | moribund_breakpoint_here_p (struct address_space *aspace, CORE_ADDR pc) |
| 2833 | { |
| 2834 | struct bp_location *loc; |
| 2835 | int ix; |
| 2836 | |
| 2837 | for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix) |
| 2838 | if (breakpoint_location_address_match (loc, aspace, pc)) |
| 2839 | return 1; |
| 2840 | |
| 2841 | return 0; |
| 2842 | } |
| 2843 | |
| 2844 | /* Returns non-zero if there's a breakpoint inserted at PC, which is |
| 2845 | inserted using regular breakpoint_chain / bp_location array |
| 2846 | mechanism. This does not check for single-step breakpoints, which |
| 2847 | are inserted and removed using direct target manipulation. */ |
| 2848 | |
| 2849 | int |
| 2850 | regular_breakpoint_inserted_here_p (struct address_space *aspace, |
| 2851 | CORE_ADDR pc) |
| 2852 | { |
| 2853 | struct bp_location *bl, **blp_tmp; |
| 2854 | |
| 2855 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2856 | { |
| 2857 | if (bl->loc_type != bp_loc_software_breakpoint |
| 2858 | && bl->loc_type != bp_loc_hardware_breakpoint) |
| 2859 | continue; |
| 2860 | |
| 2861 | if (bl->inserted |
| 2862 | && breakpoint_location_address_match (bl, aspace, pc)) |
| 2863 | { |
| 2864 | if (overlay_debugging |
| 2865 | && section_is_overlay (bl->section) |
| 2866 | && !section_is_mapped (bl->section)) |
| 2867 | continue; /* unmapped overlay -- can't be a match */ |
| 2868 | else |
| 2869 | return 1; |
| 2870 | } |
| 2871 | } |
| 2872 | return 0; |
| 2873 | } |
| 2874 | |
| 2875 | /* Returns non-zero iff there's either regular breakpoint |
| 2876 | or a single step breakpoint inserted at PC. */ |
| 2877 | |
| 2878 | int |
| 2879 | breakpoint_inserted_here_p (struct address_space *aspace, CORE_ADDR pc) |
| 2880 | { |
| 2881 | if (regular_breakpoint_inserted_here_p (aspace, pc)) |
| 2882 | return 1; |
| 2883 | |
| 2884 | if (single_step_breakpoint_inserted_here_p (aspace, pc)) |
| 2885 | return 1; |
| 2886 | |
| 2887 | return 0; |
| 2888 | } |
| 2889 | |
| 2890 | /* This function returns non-zero iff there is a software breakpoint |
| 2891 | inserted at PC. */ |
| 2892 | |
| 2893 | int |
| 2894 | software_breakpoint_inserted_here_p (struct address_space *aspace, |
| 2895 | CORE_ADDR pc) |
| 2896 | { |
| 2897 | struct bp_location *bl, **blp_tmp; |
| 2898 | |
| 2899 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2900 | { |
| 2901 | if (bl->loc_type != bp_loc_software_breakpoint) |
| 2902 | continue; |
| 2903 | |
| 2904 | if (bl->inserted |
| 2905 | && breakpoint_address_match (bl->pspace->aspace, bl->address, |
| 2906 | aspace, pc)) |
| 2907 | { |
| 2908 | if (overlay_debugging |
| 2909 | && section_is_overlay (bl->section) |
| 2910 | && !section_is_mapped (bl->section)) |
| 2911 | continue; /* unmapped overlay -- can't be a match */ |
| 2912 | else |
| 2913 | return 1; |
| 2914 | } |
| 2915 | } |
| 2916 | |
| 2917 | /* Also check for software single-step breakpoints. */ |
| 2918 | if (single_step_breakpoint_inserted_here_p (aspace, pc)) |
| 2919 | return 1; |
| 2920 | |
| 2921 | return 0; |
| 2922 | } |
| 2923 | |
| 2924 | int |
| 2925 | hardware_watchpoint_inserted_in_range (struct address_space *aspace, |
| 2926 | CORE_ADDR addr, ULONGEST len) |
| 2927 | { |
| 2928 | struct breakpoint *bpt; |
| 2929 | |
| 2930 | ALL_BREAKPOINTS (bpt) |
| 2931 | { |
| 2932 | struct bp_location *loc; |
| 2933 | |
| 2934 | if (bpt->type != bp_hardware_watchpoint |
| 2935 | && bpt->type != bp_access_watchpoint) |
| 2936 | continue; |
| 2937 | |
| 2938 | if (!breakpoint_enabled (bpt)) |
| 2939 | continue; |
| 2940 | |
| 2941 | for (loc = bpt->loc; loc; loc = loc->next) |
| 2942 | if (loc->pspace->aspace == aspace && loc->inserted) |
| 2943 | { |
| 2944 | CORE_ADDR l, h; |
| 2945 | |
| 2946 | /* Check for intersection. */ |
| 2947 | l = max (loc->address, addr); |
| 2948 | h = min (loc->address + loc->length, addr + len); |
| 2949 | if (l < h) |
| 2950 | return 1; |
| 2951 | } |
| 2952 | } |
| 2953 | return 0; |
| 2954 | } |
| 2955 | |
| 2956 | /* breakpoint_thread_match (PC, PTID) returns true if the breakpoint at |
| 2957 | PC is valid for process/thread PTID. */ |
| 2958 | |
| 2959 | int |
| 2960 | breakpoint_thread_match (struct address_space *aspace, CORE_ADDR pc, |
| 2961 | ptid_t ptid) |
| 2962 | { |
| 2963 | struct bp_location *bl, **blp_tmp; |
| 2964 | /* The thread and task IDs associated to PTID, computed lazily. */ |
| 2965 | int thread = -1; |
| 2966 | int task = 0; |
| 2967 | |
| 2968 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 2969 | { |
| 2970 | if (bl->loc_type != bp_loc_software_breakpoint |
| 2971 | && bl->loc_type != bp_loc_hardware_breakpoint) |
| 2972 | continue; |
| 2973 | |
| 2974 | /* ALL_BP_LOCATIONS bp_location has bl->OWNER always non-NULL. */ |
| 2975 | if (!breakpoint_enabled (bl->owner) |
| 2976 | && bl->owner->enable_state != bp_permanent) |
| 2977 | continue; |
| 2978 | |
| 2979 | if (!breakpoint_location_address_match (bl, aspace, pc)) |
| 2980 | continue; |
| 2981 | |
| 2982 | if (bl->owner->thread != -1) |
| 2983 | { |
| 2984 | /* This is a thread-specific breakpoint. Check that ptid |
| 2985 | matches that thread. If thread hasn't been computed yet, |
| 2986 | it is now time to do so. */ |
| 2987 | if (thread == -1) |
| 2988 | thread = pid_to_thread_id (ptid); |
| 2989 | if (bl->owner->thread != thread) |
| 2990 | continue; |
| 2991 | } |
| 2992 | |
| 2993 | if (bl->owner->task != 0) |
| 2994 | { |
| 2995 | /* This is a task-specific breakpoint. Check that ptid |
| 2996 | matches that task. If task hasn't been computed yet, |
| 2997 | it is now time to do so. */ |
| 2998 | if (task == 0) |
| 2999 | task = ada_get_task_number (ptid); |
| 3000 | if (bl->owner->task != task) |
| 3001 | continue; |
| 3002 | } |
| 3003 | |
| 3004 | if (overlay_debugging |
| 3005 | && section_is_overlay (bl->section) |
| 3006 | && !section_is_mapped (bl->section)) |
| 3007 | continue; /* unmapped overlay -- can't be a match */ |
| 3008 | |
| 3009 | return 1; |
| 3010 | } |
| 3011 | |
| 3012 | return 0; |
| 3013 | } |
| 3014 | \f |
| 3015 | |
| 3016 | /* bpstat stuff. External routines' interfaces are documented |
| 3017 | in breakpoint.h. */ |
| 3018 | |
| 3019 | int |
| 3020 | ep_is_catchpoint (struct breakpoint *ep) |
| 3021 | { |
| 3022 | return (ep->type == bp_catchpoint); |
| 3023 | } |
| 3024 | |
| 3025 | /* Frees any storage that is part of a bpstat. Does not walk the |
| 3026 | 'next' chain. */ |
| 3027 | |
| 3028 | static void |
| 3029 | bpstat_free (bpstat bs) |
| 3030 | { |
| 3031 | if (bs->old_val != NULL) |
| 3032 | value_free (bs->old_val); |
| 3033 | decref_counted_command_line (&bs->commands); |
| 3034 | decref_bp_location (&bs->bp_location_at); |
| 3035 | xfree (bs); |
| 3036 | } |
| 3037 | |
| 3038 | /* Clear a bpstat so that it says we are not at any breakpoint. |
| 3039 | Also free any storage that is part of a bpstat. */ |
| 3040 | |
| 3041 | void |
| 3042 | bpstat_clear (bpstat *bsp) |
| 3043 | { |
| 3044 | bpstat p; |
| 3045 | bpstat q; |
| 3046 | |
| 3047 | if (bsp == 0) |
| 3048 | return; |
| 3049 | p = *bsp; |
| 3050 | while (p != NULL) |
| 3051 | { |
| 3052 | q = p->next; |
| 3053 | bpstat_free (p); |
| 3054 | p = q; |
| 3055 | } |
| 3056 | *bsp = NULL; |
| 3057 | } |
| 3058 | |
| 3059 | /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that |
| 3060 | is part of the bpstat is copied as well. */ |
| 3061 | |
| 3062 | bpstat |
| 3063 | bpstat_copy (bpstat bs) |
| 3064 | { |
| 3065 | bpstat p = NULL; |
| 3066 | bpstat tmp; |
| 3067 | bpstat retval = NULL; |
| 3068 | |
| 3069 | if (bs == NULL) |
| 3070 | return bs; |
| 3071 | |
| 3072 | for (; bs != NULL; bs = bs->next) |
| 3073 | { |
| 3074 | tmp = (bpstat) xmalloc (sizeof (*tmp)); |
| 3075 | memcpy (tmp, bs, sizeof (*tmp)); |
| 3076 | incref_counted_command_line (tmp->commands); |
| 3077 | incref_bp_location (tmp->bp_location_at); |
| 3078 | if (bs->old_val != NULL) |
| 3079 | { |
| 3080 | tmp->old_val = value_copy (bs->old_val); |
| 3081 | release_value (tmp->old_val); |
| 3082 | } |
| 3083 | |
| 3084 | if (p == NULL) |
| 3085 | /* This is the first thing in the chain. */ |
| 3086 | retval = tmp; |
| 3087 | else |
| 3088 | p->next = tmp; |
| 3089 | p = tmp; |
| 3090 | } |
| 3091 | p->next = NULL; |
| 3092 | return retval; |
| 3093 | } |
| 3094 | |
| 3095 | /* Find the bpstat associated with this breakpoint. */ |
| 3096 | |
| 3097 | bpstat |
| 3098 | bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint) |
| 3099 | { |
| 3100 | if (bsp == NULL) |
| 3101 | return NULL; |
| 3102 | |
| 3103 | for (; bsp != NULL; bsp = bsp->next) |
| 3104 | { |
| 3105 | if (bsp->breakpoint_at == breakpoint) |
| 3106 | return bsp; |
| 3107 | } |
| 3108 | return NULL; |
| 3109 | } |
| 3110 | |
| 3111 | /* Put in *NUM the breakpoint number of the first breakpoint we are |
| 3112 | stopped at. *BSP upon return is a bpstat which points to the |
| 3113 | remaining breakpoints stopped at (but which is not guaranteed to be |
| 3114 | good for anything but further calls to bpstat_num). |
| 3115 | |
| 3116 | Return 0 if passed a bpstat which does not indicate any breakpoints. |
| 3117 | Return -1 if stopped at a breakpoint that has been deleted since |
| 3118 | we set it. |
| 3119 | Return 1 otherwise. */ |
| 3120 | |
| 3121 | int |
| 3122 | bpstat_num (bpstat *bsp, int *num) |
| 3123 | { |
| 3124 | struct breakpoint *b; |
| 3125 | |
| 3126 | if ((*bsp) == NULL) |
| 3127 | return 0; /* No more breakpoint values */ |
| 3128 | |
| 3129 | /* We assume we'll never have several bpstats that correspond to a |
| 3130 | single breakpoint -- otherwise, this function might return the |
| 3131 | same number more than once and this will look ugly. */ |
| 3132 | b = (*bsp)->breakpoint_at; |
| 3133 | *bsp = (*bsp)->next; |
| 3134 | if (b == NULL) |
| 3135 | return -1; /* breakpoint that's been deleted since */ |
| 3136 | |
| 3137 | *num = b->number; /* We have its number */ |
| 3138 | return 1; |
| 3139 | } |
| 3140 | |
| 3141 | /* Modify BS so that the actions will not be performed. */ |
| 3142 | |
| 3143 | void |
| 3144 | bpstat_clear_actions (bpstat bs) |
| 3145 | { |
| 3146 | for (; bs != NULL; bs = bs->next) |
| 3147 | { |
| 3148 | decref_counted_command_line (&bs->commands); |
| 3149 | bs->commands_left = NULL; |
| 3150 | if (bs->old_val != NULL) |
| 3151 | { |
| 3152 | value_free (bs->old_val); |
| 3153 | bs->old_val = NULL; |
| 3154 | } |
| 3155 | } |
| 3156 | } |
| 3157 | |
| 3158 | /* Called when a command is about to proceed the inferior. */ |
| 3159 | |
| 3160 | static void |
| 3161 | breakpoint_about_to_proceed (void) |
| 3162 | { |
| 3163 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 3164 | { |
| 3165 | struct thread_info *tp = inferior_thread (); |
| 3166 | |
| 3167 | /* Allow inferior function calls in breakpoint commands to not |
| 3168 | interrupt the command list. When the call finishes |
| 3169 | successfully, the inferior will be standing at the same |
| 3170 | breakpoint as if nothing happened. */ |
| 3171 | if (tp->control.in_infcall) |
| 3172 | return; |
| 3173 | } |
| 3174 | |
| 3175 | breakpoint_proceeded = 1; |
| 3176 | } |
| 3177 | |
| 3178 | /* Stub for cleaning up our state if we error-out of a breakpoint |
| 3179 | command. */ |
| 3180 | static void |
| 3181 | cleanup_executing_breakpoints (void *ignore) |
| 3182 | { |
| 3183 | executing_breakpoint_commands = 0; |
| 3184 | } |
| 3185 | |
| 3186 | /* Execute all the commands associated with all the breakpoints at |
| 3187 | this location. Any of these commands could cause the process to |
| 3188 | proceed beyond this point, etc. We look out for such changes by |
| 3189 | checking the global "breakpoint_proceeded" after each command. |
| 3190 | |
| 3191 | Returns true if a breakpoint command resumed the inferior. In that |
| 3192 | case, it is the caller's responsibility to recall it again with the |
| 3193 | bpstat of the current thread. */ |
| 3194 | |
| 3195 | static int |
| 3196 | bpstat_do_actions_1 (bpstat *bsp) |
| 3197 | { |
| 3198 | bpstat bs; |
| 3199 | struct cleanup *old_chain; |
| 3200 | int again = 0; |
| 3201 | |
| 3202 | /* Avoid endless recursion if a `source' command is contained |
| 3203 | in bs->commands. */ |
| 3204 | if (executing_breakpoint_commands) |
| 3205 | return 0; |
| 3206 | |
| 3207 | executing_breakpoint_commands = 1; |
| 3208 | old_chain = make_cleanup (cleanup_executing_breakpoints, 0); |
| 3209 | |
| 3210 | prevent_dont_repeat (); |
| 3211 | |
| 3212 | /* This pointer will iterate over the list of bpstat's. */ |
| 3213 | bs = *bsp; |
| 3214 | |
| 3215 | breakpoint_proceeded = 0; |
| 3216 | for (; bs != NULL; bs = bs->next) |
| 3217 | { |
| 3218 | struct counted_command_line *ccmd; |
| 3219 | struct command_line *cmd; |
| 3220 | struct cleanup *this_cmd_tree_chain; |
| 3221 | |
| 3222 | /* Take ownership of the BSP's command tree, if it has one. |
| 3223 | |
| 3224 | The command tree could legitimately contain commands like |
| 3225 | 'step' and 'next', which call clear_proceed_status, which |
| 3226 | frees stop_bpstat's command tree. To make sure this doesn't |
| 3227 | free the tree we're executing out from under us, we need to |
| 3228 | take ownership of the tree ourselves. Since a given bpstat's |
| 3229 | commands are only executed once, we don't need to copy it; we |
| 3230 | can clear the pointer in the bpstat, and make sure we free |
| 3231 | the tree when we're done. */ |
| 3232 | ccmd = bs->commands; |
| 3233 | bs->commands = NULL; |
| 3234 | this_cmd_tree_chain |
| 3235 | = make_cleanup_decref_counted_command_line (&ccmd); |
| 3236 | cmd = bs->commands_left; |
| 3237 | bs->commands_left = NULL; |
| 3238 | |
| 3239 | while (cmd != NULL) |
| 3240 | { |
| 3241 | execute_control_command (cmd); |
| 3242 | |
| 3243 | if (breakpoint_proceeded) |
| 3244 | break; |
| 3245 | else |
| 3246 | cmd = cmd->next; |
| 3247 | } |
| 3248 | |
| 3249 | /* We can free this command tree now. */ |
| 3250 | do_cleanups (this_cmd_tree_chain); |
| 3251 | |
| 3252 | if (breakpoint_proceeded) |
| 3253 | { |
| 3254 | if (target_can_async_p ()) |
| 3255 | /* If we are in async mode, then the target might be still |
| 3256 | running, not stopped at any breakpoint, so nothing for |
| 3257 | us to do here -- just return to the event loop. */ |
| 3258 | ; |
| 3259 | else |
| 3260 | /* In sync mode, when execute_control_command returns |
| 3261 | we're already standing on the next breakpoint. |
| 3262 | Breakpoint commands for that stop were not run, since |
| 3263 | execute_command does not run breakpoint commands -- |
| 3264 | only command_line_handler does, but that one is not |
| 3265 | involved in execution of breakpoint commands. So, we |
| 3266 | can now execute breakpoint commands. It should be |
| 3267 | noted that making execute_command do bpstat actions is |
| 3268 | not an option -- in this case we'll have recursive |
| 3269 | invocation of bpstat for each breakpoint with a |
| 3270 | command, and can easily blow up GDB stack. Instead, we |
| 3271 | return true, which will trigger the caller to recall us |
| 3272 | with the new stop_bpstat. */ |
| 3273 | again = 1; |
| 3274 | break; |
| 3275 | } |
| 3276 | } |
| 3277 | do_cleanups (old_chain); |
| 3278 | return again; |
| 3279 | } |
| 3280 | |
| 3281 | void |
| 3282 | bpstat_do_actions (void) |
| 3283 | { |
| 3284 | /* Do any commands attached to breakpoint we are stopped at. */ |
| 3285 | while (!ptid_equal (inferior_ptid, null_ptid) |
| 3286 | && target_has_execution |
| 3287 | && !is_exited (inferior_ptid) |
| 3288 | && !is_executing (inferior_ptid)) |
| 3289 | /* Since in sync mode, bpstat_do_actions may resume the inferior, |
| 3290 | and only return when it is stopped at the next breakpoint, we |
| 3291 | keep doing breakpoint actions until it returns false to |
| 3292 | indicate the inferior was not resumed. */ |
| 3293 | if (!bpstat_do_actions_1 (&inferior_thread ()->control.stop_bpstat)) |
| 3294 | break; |
| 3295 | } |
| 3296 | |
| 3297 | /* Print out the (old or new) value associated with a watchpoint. */ |
| 3298 | |
| 3299 | static void |
| 3300 | watchpoint_value_print (struct value *val, struct ui_file *stream) |
| 3301 | { |
| 3302 | if (val == NULL) |
| 3303 | fprintf_unfiltered (stream, _("<unreadable>")); |
| 3304 | else |
| 3305 | { |
| 3306 | struct value_print_options opts; |
| 3307 | get_user_print_options (&opts); |
| 3308 | value_print (val, stream, &opts); |
| 3309 | } |
| 3310 | } |
| 3311 | |
| 3312 | /* This is the normal print function for a bpstat. In the future, |
| 3313 | much of this logic could (should?) be moved to bpstat_stop_status, |
| 3314 | by having it set different print_it values. |
| 3315 | |
| 3316 | Current scheme: When we stop, bpstat_print() is called. It loops |
| 3317 | through the bpstat list of things causing this stop, calling the |
| 3318 | print_bp_stop_message function on each one. The behavior of the |
| 3319 | print_bp_stop_message function depends on the print_it field of |
| 3320 | bpstat. If such field so indicates, call this function here. |
| 3321 | |
| 3322 | Return values from this routine (ultimately used by bpstat_print() |
| 3323 | and normal_stop() to decide what to do): |
| 3324 | PRINT_NOTHING: Means we already printed all we needed to print, |
| 3325 | don't print anything else. |
| 3326 | PRINT_SRC_ONLY: Means we printed something, and we do *not* desire |
| 3327 | that something to be followed by a location. |
| 3328 | PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire |
| 3329 | that something to be followed by a location. |
| 3330 | PRINT_UNKNOWN: Means we printed nothing or we need to do some more |
| 3331 | analysis. */ |
| 3332 | |
| 3333 | static enum print_stop_action |
| 3334 | print_it_typical (bpstat bs) |
| 3335 | { |
| 3336 | struct cleanup *old_chain; |
| 3337 | struct breakpoint *b; |
| 3338 | const struct bp_location *bl; |
| 3339 | struct ui_stream *stb; |
| 3340 | int bp_temp = 0; |
| 3341 | enum print_stop_action result; |
| 3342 | |
| 3343 | gdb_assert (bs->bp_location_at != NULL); |
| 3344 | |
| 3345 | bl = bs->bp_location_at; |
| 3346 | b = bs->breakpoint_at; |
| 3347 | |
| 3348 | stb = ui_out_stream_new (uiout); |
| 3349 | old_chain = make_cleanup_ui_out_stream_delete (stb); |
| 3350 | |
| 3351 | switch (b->type) |
| 3352 | { |
| 3353 | case bp_breakpoint: |
| 3354 | case bp_hardware_breakpoint: |
| 3355 | bp_temp = b->disposition == disp_del; |
| 3356 | if (bl->address != bl->requested_address) |
| 3357 | breakpoint_adjustment_warning (bl->requested_address, |
| 3358 | bl->address, |
| 3359 | b->number, 1); |
| 3360 | annotate_breakpoint (b->number); |
| 3361 | if (bp_temp) |
| 3362 | ui_out_text (uiout, "\nTemporary breakpoint "); |
| 3363 | else |
| 3364 | ui_out_text (uiout, "\nBreakpoint "); |
| 3365 | if (ui_out_is_mi_like_p (uiout)) |
| 3366 | { |
| 3367 | ui_out_field_string (uiout, "reason", |
| 3368 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
| 3369 | ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| 3370 | } |
| 3371 | ui_out_field_int (uiout, "bkptno", b->number); |
| 3372 | ui_out_text (uiout, ", "); |
| 3373 | result = PRINT_SRC_AND_LOC; |
| 3374 | break; |
| 3375 | |
| 3376 | case bp_shlib_event: |
| 3377 | /* Did we stop because the user set the stop_on_solib_events |
| 3378 | variable? (If so, we report this as a generic, "Stopped due |
| 3379 | to shlib event" message.) */ |
| 3380 | printf_filtered (_("Stopped due to shared library event\n")); |
| 3381 | result = PRINT_NOTHING; |
| 3382 | break; |
| 3383 | |
| 3384 | case bp_thread_event: |
| 3385 | /* Not sure how we will get here. |
| 3386 | GDB should not stop for these breakpoints. */ |
| 3387 | printf_filtered (_("Thread Event Breakpoint: gdb should not stop!\n")); |
| 3388 | result = PRINT_NOTHING; |
| 3389 | break; |
| 3390 | |
| 3391 | case bp_overlay_event: |
| 3392 | /* By analogy with the thread event, GDB should not stop for these. */ |
| 3393 | printf_filtered (_("Overlay Event Breakpoint: gdb should not stop!\n")); |
| 3394 | result = PRINT_NOTHING; |
| 3395 | break; |
| 3396 | |
| 3397 | case bp_longjmp_master: |
| 3398 | /* These should never be enabled. */ |
| 3399 | printf_filtered (_("Longjmp Master Breakpoint: gdb should not stop!\n")); |
| 3400 | result = PRINT_NOTHING; |
| 3401 | break; |
| 3402 | |
| 3403 | case bp_std_terminate_master: |
| 3404 | /* These should never be enabled. */ |
| 3405 | printf_filtered (_("std::terminate Master Breakpoint: " |
| 3406 | "gdb should not stop!\n")); |
| 3407 | result = PRINT_NOTHING; |
| 3408 | break; |
| 3409 | |
| 3410 | case bp_exception_master: |
| 3411 | /* These should never be enabled. */ |
| 3412 | printf_filtered (_("Exception Master Breakpoint: " |
| 3413 | "gdb should not stop!\n")); |
| 3414 | result = PRINT_NOTHING; |
| 3415 | break; |
| 3416 | |
| 3417 | case bp_watchpoint: |
| 3418 | case bp_hardware_watchpoint: |
| 3419 | annotate_watchpoint (b->number); |
| 3420 | if (ui_out_is_mi_like_p (uiout)) |
| 3421 | ui_out_field_string |
| 3422 | (uiout, "reason", |
| 3423 | async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER)); |
| 3424 | mention (b); |
| 3425 | make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| 3426 | ui_out_text (uiout, "\nOld value = "); |
| 3427 | watchpoint_value_print (bs->old_val, stb->stream); |
| 3428 | ui_out_field_stream (uiout, "old", stb); |
| 3429 | ui_out_text (uiout, "\nNew value = "); |
| 3430 | watchpoint_value_print (b->val, stb->stream); |
| 3431 | ui_out_field_stream (uiout, "new", stb); |
| 3432 | ui_out_text (uiout, "\n"); |
| 3433 | /* More than one watchpoint may have been triggered. */ |
| 3434 | result = PRINT_UNKNOWN; |
| 3435 | break; |
| 3436 | |
| 3437 | case bp_read_watchpoint: |
| 3438 | if (ui_out_is_mi_like_p (uiout)) |
| 3439 | ui_out_field_string |
| 3440 | (uiout, "reason", |
| 3441 | async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER)); |
| 3442 | mention (b); |
| 3443 | make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| 3444 | ui_out_text (uiout, "\nValue = "); |
| 3445 | watchpoint_value_print (b->val, stb->stream); |
| 3446 | ui_out_field_stream (uiout, "value", stb); |
| 3447 | ui_out_text (uiout, "\n"); |
| 3448 | result = PRINT_UNKNOWN; |
| 3449 | break; |
| 3450 | |
| 3451 | case bp_access_watchpoint: |
| 3452 | if (bs->old_val != NULL) |
| 3453 | { |
| 3454 | annotate_watchpoint (b->number); |
| 3455 | if (ui_out_is_mi_like_p (uiout)) |
| 3456 | ui_out_field_string |
| 3457 | (uiout, "reason", |
| 3458 | async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER)); |
| 3459 | mention (b); |
| 3460 | make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| 3461 | ui_out_text (uiout, "\nOld value = "); |
| 3462 | watchpoint_value_print (bs->old_val, stb->stream); |
| 3463 | ui_out_field_stream (uiout, "old", stb); |
| 3464 | ui_out_text (uiout, "\nNew value = "); |
| 3465 | } |
| 3466 | else |
| 3467 | { |
| 3468 | mention (b); |
| 3469 | if (ui_out_is_mi_like_p (uiout)) |
| 3470 | ui_out_field_string |
| 3471 | (uiout, "reason", |
| 3472 | async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER)); |
| 3473 | make_cleanup_ui_out_tuple_begin_end (uiout, "value"); |
| 3474 | ui_out_text (uiout, "\nValue = "); |
| 3475 | } |
| 3476 | watchpoint_value_print (b->val, stb->stream); |
| 3477 | ui_out_field_stream (uiout, "new", stb); |
| 3478 | ui_out_text (uiout, "\n"); |
| 3479 | result = PRINT_UNKNOWN; |
| 3480 | break; |
| 3481 | |
| 3482 | /* Fall through, we don't deal with these types of breakpoints |
| 3483 | here. */ |
| 3484 | |
| 3485 | case bp_finish: |
| 3486 | if (ui_out_is_mi_like_p (uiout)) |
| 3487 | ui_out_field_string |
| 3488 | (uiout, "reason", |
| 3489 | async_reason_lookup (EXEC_ASYNC_FUNCTION_FINISHED)); |
| 3490 | result = PRINT_UNKNOWN; |
| 3491 | break; |
| 3492 | |
| 3493 | case bp_until: |
| 3494 | if (ui_out_is_mi_like_p (uiout)) |
| 3495 | ui_out_field_string |
| 3496 | (uiout, "reason", |
| 3497 | async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED)); |
| 3498 | result = PRINT_UNKNOWN; |
| 3499 | break; |
| 3500 | |
| 3501 | case bp_none: |
| 3502 | case bp_longjmp: |
| 3503 | case bp_longjmp_resume: |
| 3504 | case bp_exception: |
| 3505 | case bp_exception_resume: |
| 3506 | case bp_step_resume: |
| 3507 | case bp_hp_step_resume: |
| 3508 | case bp_watchpoint_scope: |
| 3509 | case bp_call_dummy: |
| 3510 | case bp_std_terminate: |
| 3511 | case bp_tracepoint: |
| 3512 | case bp_fast_tracepoint: |
| 3513 | case bp_jit_event: |
| 3514 | case bp_gnu_ifunc_resolver: |
| 3515 | case bp_gnu_ifunc_resolver_return: |
| 3516 | default: |
| 3517 | result = PRINT_UNKNOWN; |
| 3518 | break; |
| 3519 | } |
| 3520 | |
| 3521 | do_cleanups (old_chain); |
| 3522 | return result; |
| 3523 | } |
| 3524 | |
| 3525 | /* Generic routine for printing messages indicating why we |
| 3526 | stopped. The behavior of this function depends on the value |
| 3527 | 'print_it' in the bpstat structure. Under some circumstances we |
| 3528 | may decide not to print anything here and delegate the task to |
| 3529 | normal_stop(). */ |
| 3530 | |
| 3531 | static enum print_stop_action |
| 3532 | print_bp_stop_message (bpstat bs) |
| 3533 | { |
| 3534 | switch (bs->print_it) |
| 3535 | { |
| 3536 | case print_it_noop: |
| 3537 | /* Nothing should be printed for this bpstat entry. */ |
| 3538 | return PRINT_UNKNOWN; |
| 3539 | break; |
| 3540 | |
| 3541 | case print_it_done: |
| 3542 | /* We still want to print the frame, but we already printed the |
| 3543 | relevant messages. */ |
| 3544 | return PRINT_SRC_AND_LOC; |
| 3545 | break; |
| 3546 | |
| 3547 | case print_it_normal: |
| 3548 | { |
| 3549 | struct breakpoint *b = bs->breakpoint_at; |
| 3550 | |
| 3551 | /* bs->breakpoint_at can be NULL if it was a momentary breakpoint |
| 3552 | which has since been deleted. */ |
| 3553 | if (b == NULL) |
| 3554 | return PRINT_UNKNOWN; |
| 3555 | |
| 3556 | /* Normal case. Call the breakpoint's print_it method, or |
| 3557 | print_it_typical. */ |
| 3558 | if (b->ops != NULL && b->ops->print_it != NULL) |
| 3559 | return b->ops->print_it (b); |
| 3560 | else |
| 3561 | return print_it_typical (bs); |
| 3562 | } |
| 3563 | break; |
| 3564 | |
| 3565 | default: |
| 3566 | internal_error (__FILE__, __LINE__, |
| 3567 | _("print_bp_stop_message: unrecognized enum value")); |
| 3568 | break; |
| 3569 | } |
| 3570 | } |
| 3571 | |
| 3572 | /* Print a message indicating what happened. This is called from |
| 3573 | normal_stop(). The input to this routine is the head of the bpstat |
| 3574 | list - a list of the eventpoints that caused this stop. This |
| 3575 | routine calls the generic print routine for printing a message |
| 3576 | about reasons for stopping. This will print (for example) the |
| 3577 | "Breakpoint n," part of the output. The return value of this |
| 3578 | routine is one of: |
| 3579 | |
| 3580 | PRINT_UNKNOWN: Means we printed nothing. |
| 3581 | PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent |
| 3582 | code to print the location. An example is |
| 3583 | "Breakpoint 1, " which should be followed by |
| 3584 | the location. |
| 3585 | PRINT_SRC_ONLY: Means we printed something, but there is no need |
| 3586 | to also print the location part of the message. |
| 3587 | An example is the catch/throw messages, which |
| 3588 | don't require a location appended to the end. |
| 3589 | PRINT_NOTHING: We have done some printing and we don't need any |
| 3590 | further info to be printed. */ |
| 3591 | |
| 3592 | enum print_stop_action |
| 3593 | bpstat_print (bpstat bs) |
| 3594 | { |
| 3595 | int val; |
| 3596 | |
| 3597 | /* Maybe another breakpoint in the chain caused us to stop. |
| 3598 | (Currently all watchpoints go on the bpstat whether hit or not. |
| 3599 | That probably could (should) be changed, provided care is taken |
| 3600 | with respect to bpstat_explains_signal). */ |
| 3601 | for (; bs; bs = bs->next) |
| 3602 | { |
| 3603 | val = print_bp_stop_message (bs); |
| 3604 | if (val == PRINT_SRC_ONLY |
| 3605 | || val == PRINT_SRC_AND_LOC |
| 3606 | || val == PRINT_NOTHING) |
| 3607 | return val; |
| 3608 | } |
| 3609 | |
| 3610 | /* We reached the end of the chain, or we got a null BS to start |
| 3611 | with and nothing was printed. */ |
| 3612 | return PRINT_UNKNOWN; |
| 3613 | } |
| 3614 | |
| 3615 | /* Evaluate the expression EXP and return 1 if value is zero. This is |
| 3616 | used inside a catch_errors to evaluate the breakpoint condition. |
| 3617 | The argument is a "struct expression *" that has been cast to a |
| 3618 | "char *" to make it pass through catch_errors. */ |
| 3619 | |
| 3620 | static int |
| 3621 | breakpoint_cond_eval (void *exp) |
| 3622 | { |
| 3623 | struct value *mark = value_mark (); |
| 3624 | int i = !value_true (evaluate_expression ((struct expression *) exp)); |
| 3625 | |
| 3626 | value_free_to_mark (mark); |
| 3627 | return i; |
| 3628 | } |
| 3629 | |
| 3630 | /* Allocate a new bpstat. Link it to the FIFO list by BS_LINK_POINTER. */ |
| 3631 | |
| 3632 | static bpstat |
| 3633 | bpstat_alloc (struct bp_location *bl, bpstat **bs_link_pointer) |
| 3634 | { |
| 3635 | bpstat bs; |
| 3636 | |
| 3637 | bs = (bpstat) xmalloc (sizeof (*bs)); |
| 3638 | bs->next = NULL; |
| 3639 | **bs_link_pointer = bs; |
| 3640 | *bs_link_pointer = &bs->next; |
| 3641 | bs->breakpoint_at = bl->owner; |
| 3642 | bs->bp_location_at = bl; |
| 3643 | incref_bp_location (bl); |
| 3644 | /* If the condition is false, etc., don't do the commands. */ |
| 3645 | bs->commands = NULL; |
| 3646 | bs->commands_left = NULL; |
| 3647 | bs->old_val = NULL; |
| 3648 | bs->print_it = print_it_normal; |
| 3649 | return bs; |
| 3650 | } |
| 3651 | \f |
| 3652 | /* The target has stopped with waitstatus WS. Check if any hardware |
| 3653 | watchpoints have triggered, according to the target. */ |
| 3654 | |
| 3655 | int |
| 3656 | watchpoints_triggered (struct target_waitstatus *ws) |
| 3657 | { |
| 3658 | int stopped_by_watchpoint = target_stopped_by_watchpoint (); |
| 3659 | CORE_ADDR addr; |
| 3660 | struct breakpoint *b; |
| 3661 | |
| 3662 | if (!stopped_by_watchpoint) |
| 3663 | { |
| 3664 | /* We were not stopped by a watchpoint. Mark all watchpoints |
| 3665 | as not triggered. */ |
| 3666 | ALL_BREAKPOINTS (b) |
| 3667 | if (is_hardware_watchpoint (b)) |
| 3668 | b->watchpoint_triggered = watch_triggered_no; |
| 3669 | |
| 3670 | return 0; |
| 3671 | } |
| 3672 | |
| 3673 | if (!target_stopped_data_address (¤t_target, &addr)) |
| 3674 | { |
| 3675 | /* We were stopped by a watchpoint, but we don't know where. |
| 3676 | Mark all watchpoints as unknown. */ |
| 3677 | ALL_BREAKPOINTS (b) |
| 3678 | if (is_hardware_watchpoint (b)) |
| 3679 | b->watchpoint_triggered = watch_triggered_unknown; |
| 3680 | |
| 3681 | return stopped_by_watchpoint; |
| 3682 | } |
| 3683 | |
| 3684 | /* The target could report the data address. Mark watchpoints |
| 3685 | affected by this data address as triggered, and all others as not |
| 3686 | triggered. */ |
| 3687 | |
| 3688 | ALL_BREAKPOINTS (b) |
| 3689 | if (is_hardware_watchpoint (b)) |
| 3690 | { |
| 3691 | struct bp_location *loc; |
| 3692 | |
| 3693 | b->watchpoint_triggered = watch_triggered_no; |
| 3694 | for (loc = b->loc; loc; loc = loc->next) |
| 3695 | { |
| 3696 | if (is_masked_watchpoint (loc->owner)) |
| 3697 | { |
| 3698 | CORE_ADDR newaddr = addr & loc->owner->hw_wp_mask; |
| 3699 | CORE_ADDR start = loc->address & loc->owner->hw_wp_mask; |
| 3700 | |
| 3701 | if (newaddr == start) |
| 3702 | { |
| 3703 | b->watchpoint_triggered = watch_triggered_yes; |
| 3704 | break; |
| 3705 | } |
| 3706 | } |
| 3707 | /* Exact match not required. Within range is sufficient. */ |
| 3708 | else if (target_watchpoint_addr_within_range (¤t_target, |
| 3709 | addr, loc->address, |
| 3710 | loc->length)) |
| 3711 | { |
| 3712 | b->watchpoint_triggered = watch_triggered_yes; |
| 3713 | break; |
| 3714 | } |
| 3715 | } |
| 3716 | } |
| 3717 | |
| 3718 | return 1; |
| 3719 | } |
| 3720 | |
| 3721 | /* Possible return values for watchpoint_check (this can't be an enum |
| 3722 | because of check_errors). */ |
| 3723 | /* The watchpoint has been deleted. */ |
| 3724 | #define WP_DELETED 1 |
| 3725 | /* The value has changed. */ |
| 3726 | #define WP_VALUE_CHANGED 2 |
| 3727 | /* The value has not changed. */ |
| 3728 | #define WP_VALUE_NOT_CHANGED 3 |
| 3729 | /* Ignore this watchpoint, no matter if the value changed or not. */ |
| 3730 | #define WP_IGNORE 4 |
| 3731 | |
| 3732 | #define BP_TEMPFLAG 1 |
| 3733 | #define BP_HARDWAREFLAG 2 |
| 3734 | |
| 3735 | /* Evaluate watchpoint condition expression and check if its value |
| 3736 | changed. |
| 3737 | |
| 3738 | P should be a pointer to struct bpstat, but is defined as a void * |
| 3739 | in order for this function to be usable with catch_errors. */ |
| 3740 | |
| 3741 | static int |
| 3742 | watchpoint_check (void *p) |
| 3743 | { |
| 3744 | bpstat bs = (bpstat) p; |
| 3745 | struct breakpoint *b; |
| 3746 | struct frame_info *fr; |
| 3747 | int within_current_scope; |
| 3748 | |
| 3749 | /* BS is built from an existing struct breakpoint. */ |
| 3750 | gdb_assert (bs->breakpoint_at != NULL); |
| 3751 | b = bs->breakpoint_at; |
| 3752 | |
| 3753 | gdb_assert (is_watchpoint (b)); |
| 3754 | |
| 3755 | /* If this is a local watchpoint, we only want to check if the |
| 3756 | watchpoint frame is in scope if the current thread is the thread |
| 3757 | that was used to create the watchpoint. */ |
| 3758 | if (!watchpoint_in_thread_scope (b)) |
| 3759 | return WP_IGNORE; |
| 3760 | |
| 3761 | if (b->exp_valid_block == NULL) |
| 3762 | within_current_scope = 1; |
| 3763 | else |
| 3764 | { |
| 3765 | struct frame_info *frame = get_current_frame (); |
| 3766 | struct gdbarch *frame_arch = get_frame_arch (frame); |
| 3767 | CORE_ADDR frame_pc = get_frame_pc (frame); |
| 3768 | |
| 3769 | /* in_function_epilogue_p() returns a non-zero value if we're |
| 3770 | still in the function but the stack frame has already been |
| 3771 | invalidated. Since we can't rely on the values of local |
| 3772 | variables after the stack has been destroyed, we are treating |
| 3773 | the watchpoint in that state as `not changed' without further |
| 3774 | checking. Don't mark watchpoints as changed if the current |
| 3775 | frame is in an epilogue - even if they are in some other |
| 3776 | frame, our view of the stack is likely to be wrong and |
| 3777 | frame_find_by_id could error out. */ |
| 3778 | if (gdbarch_in_function_epilogue_p (frame_arch, frame_pc)) |
| 3779 | return WP_IGNORE; |
| 3780 | |
| 3781 | fr = frame_find_by_id (b->watchpoint_frame); |
| 3782 | within_current_scope = (fr != NULL); |
| 3783 | |
| 3784 | /* If we've gotten confused in the unwinder, we might have |
| 3785 | returned a frame that can't describe this variable. */ |
| 3786 | if (within_current_scope) |
| 3787 | { |
| 3788 | struct symbol *function; |
| 3789 | |
| 3790 | function = get_frame_function (fr); |
| 3791 | if (function == NULL |
| 3792 | || !contained_in (b->exp_valid_block, |
| 3793 | SYMBOL_BLOCK_VALUE (function))) |
| 3794 | within_current_scope = 0; |
| 3795 | } |
| 3796 | |
| 3797 | if (within_current_scope) |
| 3798 | /* If we end up stopping, the current frame will get selected |
| 3799 | in normal_stop. So this call to select_frame won't affect |
| 3800 | the user. */ |
| 3801 | select_frame (fr); |
| 3802 | } |
| 3803 | |
| 3804 | if (within_current_scope) |
| 3805 | { |
| 3806 | /* We use value_{,free_to_}mark because it could be a *long* |
| 3807 | time before we return to the command level and call |
| 3808 | free_all_values. We can't call free_all_values because we |
| 3809 | might be in the middle of evaluating a function call. */ |
| 3810 | |
| 3811 | int pc = 0; |
| 3812 | struct value *mark; |
| 3813 | struct value *new_val; |
| 3814 | |
| 3815 | if (is_masked_watchpoint (b)) |
| 3816 | /* Since we don't know the exact trigger address (from |
| 3817 | stopped_data_address), just tell the user we've triggered |
| 3818 | a mask watchpoint. */ |
| 3819 | return WP_VALUE_CHANGED; |
| 3820 | |
| 3821 | mark = value_mark (); |
| 3822 | fetch_subexp_value (b->exp, &pc, &new_val, NULL, NULL); |
| 3823 | |
| 3824 | /* We use value_equal_contents instead of value_equal because |
| 3825 | the latter coerces an array to a pointer, thus comparing just |
| 3826 | the address of the array instead of its contents. This is |
| 3827 | not what we want. */ |
| 3828 | if ((b->val != NULL) != (new_val != NULL) |
| 3829 | || (b->val != NULL && !value_equal_contents (b->val, new_val))) |
| 3830 | { |
| 3831 | if (new_val != NULL) |
| 3832 | { |
| 3833 | release_value (new_val); |
| 3834 | value_free_to_mark (mark); |
| 3835 | } |
| 3836 | bs->old_val = b->val; |
| 3837 | b->val = new_val; |
| 3838 | b->val_valid = 1; |
| 3839 | return WP_VALUE_CHANGED; |
| 3840 | } |
| 3841 | else |
| 3842 | { |
| 3843 | /* Nothing changed. */ |
| 3844 | value_free_to_mark (mark); |
| 3845 | return WP_VALUE_NOT_CHANGED; |
| 3846 | } |
| 3847 | } |
| 3848 | else |
| 3849 | { |
| 3850 | /* This seems like the only logical thing to do because |
| 3851 | if we temporarily ignored the watchpoint, then when |
| 3852 | we reenter the block in which it is valid it contains |
| 3853 | garbage (in the case of a function, it may have two |
| 3854 | garbage values, one before and one after the prologue). |
| 3855 | So we can't even detect the first assignment to it and |
| 3856 | watch after that (since the garbage may or may not equal |
| 3857 | the first value assigned). */ |
| 3858 | /* We print all the stop information in print_it_typical(), but |
| 3859 | in this case, by the time we call print_it_typical() this bp |
| 3860 | will be deleted already. So we have no choice but print the |
| 3861 | information here. */ |
| 3862 | if (ui_out_is_mi_like_p (uiout)) |
| 3863 | ui_out_field_string |
| 3864 | (uiout, "reason", async_reason_lookup (EXEC_ASYNC_WATCHPOINT_SCOPE)); |
| 3865 | ui_out_text (uiout, "\nWatchpoint "); |
| 3866 | ui_out_field_int (uiout, "wpnum", b->number); |
| 3867 | ui_out_text (uiout, |
| 3868 | " deleted because the program has left the block in\n\ |
| 3869 | which its expression is valid.\n"); |
| 3870 | |
| 3871 | /* Make sure the watchpoint's commands aren't executed. */ |
| 3872 | decref_counted_command_line (&b->commands); |
| 3873 | watchpoint_del_at_next_stop (b); |
| 3874 | |
| 3875 | return WP_DELETED; |
| 3876 | } |
| 3877 | } |
| 3878 | |
| 3879 | /* Return true if it looks like target has stopped due to hitting |
| 3880 | breakpoint location BL. This function does not check if we |
| 3881 | should stop, only if BL explains the stop. */ |
| 3882 | static int |
| 3883 | bpstat_check_location (const struct bp_location *bl, |
| 3884 | struct address_space *aspace, CORE_ADDR bp_addr) |
| 3885 | { |
| 3886 | struct breakpoint *b = bl->owner; |
| 3887 | |
| 3888 | /* BL is from existing struct breakpoint. */ |
| 3889 | gdb_assert (b != NULL); |
| 3890 | |
| 3891 | if (b->ops && b->ops->breakpoint_hit) |
| 3892 | return b->ops->breakpoint_hit (bl, aspace, bp_addr); |
| 3893 | |
| 3894 | /* By definition, the inferior does not report stops at |
| 3895 | tracepoints. */ |
| 3896 | if (is_tracepoint (b)) |
| 3897 | return 0; |
| 3898 | |
| 3899 | if (!is_watchpoint (b) |
| 3900 | && b->type != bp_hardware_breakpoint |
| 3901 | && b->type != bp_catchpoint) /* a non-watchpoint bp */ |
| 3902 | { |
| 3903 | if (!breakpoint_address_match (bl->pspace->aspace, bl->address, |
| 3904 | aspace, bp_addr)) |
| 3905 | return 0; |
| 3906 | if (overlay_debugging /* unmapped overlay section */ |
| 3907 | && section_is_overlay (bl->section) |
| 3908 | && !section_is_mapped (bl->section)) |
| 3909 | return 0; |
| 3910 | } |
| 3911 | |
| 3912 | /* Continuable hardware watchpoints are treated as non-existent if the |
| 3913 | reason we stopped wasn't a hardware watchpoint (we didn't stop on |
| 3914 | some data address). Otherwise gdb won't stop on a break instruction |
| 3915 | in the code (not from a breakpoint) when a hardware watchpoint has |
| 3916 | been defined. Also skip watchpoints which we know did not trigger |
| 3917 | (did not match the data address). */ |
| 3918 | |
| 3919 | if (is_hardware_watchpoint (b) |
| 3920 | && b->watchpoint_triggered == watch_triggered_no) |
| 3921 | return 0; |
| 3922 | |
| 3923 | if (b->type == bp_hardware_breakpoint) |
| 3924 | { |
| 3925 | if (bl->address != bp_addr) |
| 3926 | return 0; |
| 3927 | if (overlay_debugging /* unmapped overlay section */ |
| 3928 | && section_is_overlay (bl->section) |
| 3929 | && !section_is_mapped (bl->section)) |
| 3930 | return 0; |
| 3931 | } |
| 3932 | |
| 3933 | return 1; |
| 3934 | } |
| 3935 | |
| 3936 | /* If BS refers to a watchpoint, determine if the watched values |
| 3937 | has actually changed, and we should stop. If not, set BS->stop |
| 3938 | to 0. */ |
| 3939 | static void |
| 3940 | bpstat_check_watchpoint (bpstat bs) |
| 3941 | { |
| 3942 | const struct bp_location *bl; |
| 3943 | struct breakpoint *b; |
| 3944 | |
| 3945 | /* BS is built for existing struct breakpoint. */ |
| 3946 | bl = bs->bp_location_at; |
| 3947 | gdb_assert (bl != NULL); |
| 3948 | b = bs->breakpoint_at; |
| 3949 | gdb_assert (b != NULL); |
| 3950 | |
| 3951 | if (is_watchpoint (b)) |
| 3952 | { |
| 3953 | int must_check_value = 0; |
| 3954 | |
| 3955 | if (b->type == bp_watchpoint) |
| 3956 | /* For a software watchpoint, we must always check the |
| 3957 | watched value. */ |
| 3958 | must_check_value = 1; |
| 3959 | else if (b->watchpoint_triggered == watch_triggered_yes) |
| 3960 | /* We have a hardware watchpoint (read, write, or access) |
| 3961 | and the target earlier reported an address watched by |
| 3962 | this watchpoint. */ |
| 3963 | must_check_value = 1; |
| 3964 | else if (b->watchpoint_triggered == watch_triggered_unknown |
| 3965 | && b->type == bp_hardware_watchpoint) |
| 3966 | /* We were stopped by a hardware watchpoint, but the target could |
| 3967 | not report the data address. We must check the watchpoint's |
| 3968 | value. Access and read watchpoints are out of luck; without |
| 3969 | a data address, we can't figure it out. */ |
| 3970 | must_check_value = 1; |
| 3971 | |
| 3972 | if (must_check_value) |
| 3973 | { |
| 3974 | char *message |
| 3975 | = xstrprintf ("Error evaluating expression for watchpoint %d\n", |
| 3976 | b->number); |
| 3977 | struct cleanup *cleanups = make_cleanup (xfree, message); |
| 3978 | int e = catch_errors (watchpoint_check, bs, message, |
| 3979 | RETURN_MASK_ALL); |
| 3980 | do_cleanups (cleanups); |
| 3981 | switch (e) |
| 3982 | { |
| 3983 | case WP_DELETED: |
| 3984 | /* We've already printed what needs to be printed. */ |
| 3985 | bs->print_it = print_it_done; |
| 3986 | /* Stop. */ |
| 3987 | break; |
| 3988 | case WP_IGNORE: |
| 3989 | bs->print_it = print_it_noop; |
| 3990 | bs->stop = 0; |
| 3991 | break; |
| 3992 | case WP_VALUE_CHANGED: |
| 3993 | if (b->type == bp_read_watchpoint) |
| 3994 | { |
| 3995 | /* There are two cases to consider here: |
| 3996 | |
| 3997 | 1. We're watching the triggered memory for reads. |
| 3998 | In that case, trust the target, and always report |
| 3999 | the watchpoint hit to the user. Even though |
| 4000 | reads don't cause value changes, the value may |
| 4001 | have changed since the last time it was read, and |
| 4002 | since we're not trapping writes, we will not see |
| 4003 | those, and as such we should ignore our notion of |
| 4004 | old value. |
| 4005 | |
| 4006 | 2. We're watching the triggered memory for both |
| 4007 | reads and writes. There are two ways this may |
| 4008 | happen: |
| 4009 | |
| 4010 | 2.1. This is a target that can't break on data |
| 4011 | reads only, but can break on accesses (reads or |
| 4012 | writes), such as e.g., x86. We detect this case |
| 4013 | at the time we try to insert read watchpoints. |
| 4014 | |
| 4015 | 2.2. Otherwise, the target supports read |
| 4016 | watchpoints, but, the user set an access or write |
| 4017 | watchpoint watching the same memory as this read |
| 4018 | watchpoint. |
| 4019 | |
| 4020 | If we're watching memory writes as well as reads, |
| 4021 | ignore watchpoint hits when we find that the |
| 4022 | value hasn't changed, as reads don't cause |
| 4023 | changes. This still gives false positives when |
| 4024 | the program writes the same value to memory as |
| 4025 | what there was already in memory (we will confuse |
| 4026 | it for a read), but it's much better than |
| 4027 | nothing. */ |
| 4028 | |
| 4029 | int other_write_watchpoint = 0; |
| 4030 | |
| 4031 | if (bl->watchpoint_type == hw_read) |
| 4032 | { |
| 4033 | struct breakpoint *other_b; |
| 4034 | |
| 4035 | ALL_BREAKPOINTS (other_b) |
| 4036 | if ((other_b->type == bp_hardware_watchpoint |
| 4037 | || other_b->type == bp_access_watchpoint) |
| 4038 | && (other_b->watchpoint_triggered |
| 4039 | == watch_triggered_yes)) |
| 4040 | { |
| 4041 | other_write_watchpoint = 1; |
| 4042 | break; |
| 4043 | } |
| 4044 | } |
| 4045 | |
| 4046 | if (other_write_watchpoint |
| 4047 | || bl->watchpoint_type == hw_access) |
| 4048 | { |
| 4049 | /* We're watching the same memory for writes, |
| 4050 | and the value changed since the last time we |
| 4051 | updated it, so this trap must be for a write. |
| 4052 | Ignore it. */ |
| 4053 | bs->print_it = print_it_noop; |
| 4054 | bs->stop = 0; |
| 4055 | } |
| 4056 | } |
| 4057 | break; |
| 4058 | case WP_VALUE_NOT_CHANGED: |
| 4059 | if (b->type == bp_hardware_watchpoint |
| 4060 | || b->type == bp_watchpoint) |
| 4061 | { |
| 4062 | /* Don't stop: write watchpoints shouldn't fire if |
| 4063 | the value hasn't changed. */ |
| 4064 | bs->print_it = print_it_noop; |
| 4065 | bs->stop = 0; |
| 4066 | } |
| 4067 | /* Stop. */ |
| 4068 | break; |
| 4069 | default: |
| 4070 | /* Can't happen. */ |
| 4071 | case 0: |
| 4072 | /* Error from catch_errors. */ |
| 4073 | printf_filtered (_("Watchpoint %d deleted.\n"), b->number); |
| 4074 | watchpoint_del_at_next_stop (b); |
| 4075 | /* We've already printed what needs to be printed. */ |
| 4076 | bs->print_it = print_it_done; |
| 4077 | break; |
| 4078 | } |
| 4079 | } |
| 4080 | else /* must_check_value == 0 */ |
| 4081 | { |
| 4082 | /* This is a case where some watchpoint(s) triggered, but |
| 4083 | not at the address of this watchpoint, or else no |
| 4084 | watchpoint triggered after all. So don't print |
| 4085 | anything for this watchpoint. */ |
| 4086 | bs->print_it = print_it_noop; |
| 4087 | bs->stop = 0; |
| 4088 | } |
| 4089 | } |
| 4090 | } |
| 4091 | |
| 4092 | |
| 4093 | /* Check conditions (condition proper, frame, thread and ignore count) |
| 4094 | of breakpoint referred to by BS. If we should not stop for this |
| 4095 | breakpoint, set BS->stop to 0. */ |
| 4096 | |
| 4097 | static void |
| 4098 | bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid) |
| 4099 | { |
| 4100 | int thread_id = pid_to_thread_id (ptid); |
| 4101 | const struct bp_location *bl; |
| 4102 | struct breakpoint *b; |
| 4103 | |
| 4104 | /* BS is built for existing struct breakpoint. */ |
| 4105 | bl = bs->bp_location_at; |
| 4106 | gdb_assert (bl != NULL); |
| 4107 | b = bs->breakpoint_at; |
| 4108 | gdb_assert (b != NULL); |
| 4109 | |
| 4110 | if (frame_id_p (b->frame_id) |
| 4111 | && !frame_id_eq (b->frame_id, get_stack_frame_id (get_current_frame ()))) |
| 4112 | bs->stop = 0; |
| 4113 | else if (bs->stop) |
| 4114 | { |
| 4115 | int value_is_zero = 0; |
| 4116 | struct expression *cond; |
| 4117 | |
| 4118 | /* Evaluate Python breakpoints that have a "stop" |
| 4119 | method implemented. */ |
| 4120 | if (b->py_bp_object) |
| 4121 | bs->stop = gdbpy_should_stop (b->py_bp_object); |
| 4122 | |
| 4123 | if (is_watchpoint (b)) |
| 4124 | cond = b->cond_exp; |
| 4125 | else |
| 4126 | cond = bl->cond; |
| 4127 | |
| 4128 | if (cond && b->disposition != disp_del_at_next_stop) |
| 4129 | { |
| 4130 | int within_current_scope = 1; |
| 4131 | |
| 4132 | /* We use value_mark and value_free_to_mark because it could |
| 4133 | be a long time before we return to the command level and |
| 4134 | call free_all_values. We can't call free_all_values |
| 4135 | because we might be in the middle of evaluating a |
| 4136 | function call. */ |
| 4137 | struct value *mark = value_mark (); |
| 4138 | |
| 4139 | /* Need to select the frame, with all that implies so that |
| 4140 | the conditions will have the right context. Because we |
| 4141 | use the frame, we will not see an inlined function's |
| 4142 | variables when we arrive at a breakpoint at the start |
| 4143 | of the inlined function; the current frame will be the |
| 4144 | call site. */ |
| 4145 | if (!is_watchpoint (b) || b->cond_exp_valid_block == NULL) |
| 4146 | select_frame (get_current_frame ()); |
| 4147 | else |
| 4148 | { |
| 4149 | struct frame_info *frame; |
| 4150 | |
| 4151 | /* For local watchpoint expressions, which particular |
| 4152 | instance of a local is being watched matters, so we |
| 4153 | keep track of the frame to evaluate the expression |
| 4154 | in. To evaluate the condition however, it doesn't |
| 4155 | really matter which instantiation of the function |
| 4156 | where the condition makes sense triggers the |
| 4157 | watchpoint. This allows an expression like "watch |
| 4158 | global if q > 10" set in `func', catch writes to |
| 4159 | global on all threads that call `func', or catch |
| 4160 | writes on all recursive calls of `func' by a single |
| 4161 | thread. We simply always evaluate the condition in |
| 4162 | the innermost frame that's executing where it makes |
| 4163 | sense to evaluate the condition. It seems |
| 4164 | intuitive. */ |
| 4165 | frame = block_innermost_frame (b->cond_exp_valid_block); |
| 4166 | if (frame != NULL) |
| 4167 | select_frame (frame); |
| 4168 | else |
| 4169 | within_current_scope = 0; |
| 4170 | } |
| 4171 | if (within_current_scope) |
| 4172 | value_is_zero |
| 4173 | = catch_errors (breakpoint_cond_eval, cond, |
| 4174 | "Error in testing breakpoint condition:\n", |
| 4175 | RETURN_MASK_ALL); |
| 4176 | else |
| 4177 | { |
| 4178 | warning (_("Watchpoint condition cannot be tested " |
| 4179 | "in the current scope")); |
| 4180 | /* If we failed to set the right context for this |
| 4181 | watchpoint, unconditionally report it. */ |
| 4182 | value_is_zero = 0; |
| 4183 | } |
| 4184 | /* FIXME-someday, should give breakpoint #. */ |
| 4185 | value_free_to_mark (mark); |
| 4186 | } |
| 4187 | |
| 4188 | if (cond && value_is_zero) |
| 4189 | { |
| 4190 | bs->stop = 0; |
| 4191 | } |
| 4192 | else if (b->thread != -1 && b->thread != thread_id) |
| 4193 | { |
| 4194 | bs->stop = 0; |
| 4195 | } |
| 4196 | else if (b->ignore_count > 0) |
| 4197 | { |
| 4198 | b->ignore_count--; |
| 4199 | annotate_ignore_count_change (); |
| 4200 | bs->stop = 0; |
| 4201 | /* Increase the hit count even though we don't stop. */ |
| 4202 | ++(b->hit_count); |
| 4203 | observer_notify_breakpoint_modified (b); |
| 4204 | } |
| 4205 | } |
| 4206 | } |
| 4207 | |
| 4208 | |
| 4209 | /* Get a bpstat associated with having just stopped at address |
| 4210 | BP_ADDR in thread PTID. |
| 4211 | |
| 4212 | Determine whether we stopped at a breakpoint, etc, or whether we |
| 4213 | don't understand this stop. Result is a chain of bpstat's such |
| 4214 | that: |
| 4215 | |
| 4216 | if we don't understand the stop, the result is a null pointer. |
| 4217 | |
| 4218 | if we understand why we stopped, the result is not null. |
| 4219 | |
| 4220 | Each element of the chain refers to a particular breakpoint or |
| 4221 | watchpoint at which we have stopped. (We may have stopped for |
| 4222 | several reasons concurrently.) |
| 4223 | |
| 4224 | Each element of the chain has valid next, breakpoint_at, |
| 4225 | commands, FIXME??? fields. */ |
| 4226 | |
| 4227 | bpstat |
| 4228 | bpstat_stop_status (struct address_space *aspace, |
| 4229 | CORE_ADDR bp_addr, ptid_t ptid) |
| 4230 | { |
| 4231 | struct breakpoint *b = NULL; |
| 4232 | struct bp_location *bl; |
| 4233 | struct bp_location *loc; |
| 4234 | /* First item of allocated bpstat's. */ |
| 4235 | bpstat bs_head = NULL, *bs_link = &bs_head; |
| 4236 | /* Pointer to the last thing in the chain currently. */ |
| 4237 | bpstat bs; |
| 4238 | int ix; |
| 4239 | int need_remove_insert; |
| 4240 | int removed_any; |
| 4241 | |
| 4242 | /* First, build the bpstat chain with locations that explain a |
| 4243 | target stop, while being careful to not set the target running, |
| 4244 | as that may invalidate locations (in particular watchpoint |
| 4245 | locations are recreated). Resuming will happen here with |
| 4246 | breakpoint conditions or watchpoint expressions that include |
| 4247 | inferior function calls. */ |
| 4248 | |
| 4249 | ALL_BREAKPOINTS (b) |
| 4250 | { |
| 4251 | if (!breakpoint_enabled (b) && b->enable_state != bp_permanent) |
| 4252 | continue; |
| 4253 | |
| 4254 | for (bl = b->loc; bl != NULL; bl = bl->next) |
| 4255 | { |
| 4256 | /* For hardware watchpoints, we look only at the first |
| 4257 | location. The watchpoint_check function will work on the |
| 4258 | entire expression, not the individual locations. For |
| 4259 | read watchpoints, the watchpoints_triggered function has |
| 4260 | checked all locations already. */ |
| 4261 | if (b->type == bp_hardware_watchpoint && bl != b->loc) |
| 4262 | break; |
| 4263 | |
| 4264 | if (bl->shlib_disabled) |
| 4265 | continue; |
| 4266 | |
| 4267 | if (!bpstat_check_location (bl, aspace, bp_addr)) |
| 4268 | continue; |
| 4269 | |
| 4270 | /* Come here if it's a watchpoint, or if the break address |
| 4271 | matches. */ |
| 4272 | |
| 4273 | bs = bpstat_alloc (bl, &bs_link); /* Alloc a bpstat to |
| 4274 | explain stop. */ |
| 4275 | |
| 4276 | /* Assume we stop. Should we find a watchpoint that is not |
| 4277 | actually triggered, or if the condition of the breakpoint |
| 4278 | evaluates as false, we'll reset 'stop' to 0. */ |
| 4279 | bs->stop = 1; |
| 4280 | bs->print = 1; |
| 4281 | |
| 4282 | /* If this is a scope breakpoint, mark the associated |
| 4283 | watchpoint as triggered so that we will handle the |
| 4284 | out-of-scope event. We'll get to the watchpoint next |
| 4285 | iteration. */ |
| 4286 | if (b->type == bp_watchpoint_scope && b->related_breakpoint != b) |
| 4287 | b->related_breakpoint->watchpoint_triggered = watch_triggered_yes; |
| 4288 | } |
| 4289 | } |
| 4290 | |
| 4291 | for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix) |
| 4292 | { |
| 4293 | if (breakpoint_location_address_match (loc, aspace, bp_addr)) |
| 4294 | { |
| 4295 | bs = bpstat_alloc (loc, &bs_link); |
| 4296 | /* For hits of moribund locations, we should just proceed. */ |
| 4297 | bs->stop = 0; |
| 4298 | bs->print = 0; |
| 4299 | bs->print_it = print_it_noop; |
| 4300 | } |
| 4301 | } |
| 4302 | |
| 4303 | /* Now go through the locations that caused the target to stop, and |
| 4304 | check whether we're interested in reporting this stop to higher |
| 4305 | layers, or whether we should resume the target transparently. */ |
| 4306 | |
| 4307 | removed_any = 0; |
| 4308 | |
| 4309 | for (bs = bs_head; bs != NULL; bs = bs->next) |
| 4310 | { |
| 4311 | if (!bs->stop) |
| 4312 | continue; |
| 4313 | |
| 4314 | bpstat_check_watchpoint (bs); |
| 4315 | if (!bs->stop) |
| 4316 | continue; |
| 4317 | |
| 4318 | b = bs->breakpoint_at; |
| 4319 | |
| 4320 | if (b->type == bp_thread_event || b->type == bp_overlay_event |
| 4321 | || b->type == bp_longjmp_master |
| 4322 | || b->type == bp_std_terminate_master |
| 4323 | || b->type == bp_exception_master) |
| 4324 | /* We do not stop for these. */ |
| 4325 | bs->stop = 0; |
| 4326 | else |
| 4327 | bpstat_check_breakpoint_conditions (bs, ptid); |
| 4328 | |
| 4329 | if (bs->stop) |
| 4330 | { |
| 4331 | ++(b->hit_count); |
| 4332 | observer_notify_breakpoint_modified (b); |
| 4333 | |
| 4334 | /* We will stop here. */ |
| 4335 | if (b->disposition == disp_disable) |
| 4336 | { |
| 4337 | if (b->enable_state != bp_permanent) |
| 4338 | b->enable_state = bp_disabled; |
| 4339 | removed_any = 1; |
| 4340 | } |
| 4341 | if (b->silent) |
| 4342 | bs->print = 0; |
| 4343 | bs->commands = b->commands; |
| 4344 | incref_counted_command_line (bs->commands); |
| 4345 | bs->commands_left = bs->commands ? bs->commands->commands : NULL; |
| 4346 | if (bs->commands_left |
| 4347 | && (strcmp ("silent", bs->commands_left->line) == 0 |
| 4348 | || (xdb_commands |
| 4349 | && strcmp ("Q", |
| 4350 | bs->commands_left->line) == 0))) |
| 4351 | { |
| 4352 | bs->commands_left = bs->commands_left->next; |
| 4353 | bs->print = 0; |
| 4354 | } |
| 4355 | } |
| 4356 | |
| 4357 | /* Print nothing for this entry if we dont stop or dont print. */ |
| 4358 | if (bs->stop == 0 || bs->print == 0) |
| 4359 | bs->print_it = print_it_noop; |
| 4360 | } |
| 4361 | |
| 4362 | /* If we aren't stopping, the value of some hardware watchpoint may |
| 4363 | not have changed, but the intermediate memory locations we are |
| 4364 | watching may have. Don't bother if we're stopping; this will get |
| 4365 | done later. */ |
| 4366 | need_remove_insert = 0; |
| 4367 | if (! bpstat_causes_stop (bs_head)) |
| 4368 | for (bs = bs_head; bs != NULL; bs = bs->next) |
| 4369 | if (!bs->stop |
| 4370 | && bs->breakpoint_at |
| 4371 | && is_hardware_watchpoint (bs->breakpoint_at)) |
| 4372 | { |
| 4373 | update_watchpoint (bs->breakpoint_at, 0 /* don't reparse. */); |
| 4374 | need_remove_insert = 1; |
| 4375 | } |
| 4376 | |
| 4377 | if (need_remove_insert) |
| 4378 | update_global_location_list (1); |
| 4379 | else if (removed_any) |
| 4380 | update_global_location_list (0); |
| 4381 | |
| 4382 | return bs_head; |
| 4383 | } |
| 4384 | |
| 4385 | static void |
| 4386 | handle_jit_event (void) |
| 4387 | { |
| 4388 | struct frame_info *frame; |
| 4389 | struct gdbarch *gdbarch; |
| 4390 | |
| 4391 | /* Switch terminal for any messages produced by |
| 4392 | breakpoint_re_set. */ |
| 4393 | target_terminal_ours_for_output (); |
| 4394 | |
| 4395 | frame = get_current_frame (); |
| 4396 | gdbarch = get_frame_arch (frame); |
| 4397 | |
| 4398 | jit_event_handler (gdbarch); |
| 4399 | |
| 4400 | target_terminal_inferior (); |
| 4401 | } |
| 4402 | |
| 4403 | /* Prepare WHAT final decision for infrun. */ |
| 4404 | |
| 4405 | /* Decide what infrun needs to do with this bpstat. */ |
| 4406 | |
| 4407 | struct bpstat_what |
| 4408 | bpstat_what (bpstat bs_head) |
| 4409 | { |
| 4410 | struct bpstat_what retval; |
| 4411 | /* We need to defer calling `solib_add', as adding new symbols |
| 4412 | resets breakpoints, which in turn deletes breakpoint locations, |
| 4413 | and hence may clear unprocessed entries in the BS chain. */ |
| 4414 | int shlib_event = 0; |
| 4415 | int jit_event = 0; |
| 4416 | bpstat bs; |
| 4417 | |
| 4418 | retval.main_action = BPSTAT_WHAT_KEEP_CHECKING; |
| 4419 | retval.call_dummy = STOP_NONE; |
| 4420 | retval.is_longjmp = 0; |
| 4421 | |
| 4422 | for (bs = bs_head; bs != NULL; bs = bs->next) |
| 4423 | { |
| 4424 | /* Extract this BS's action. After processing each BS, we check |
| 4425 | if its action overrides all we've seem so far. */ |
| 4426 | enum bpstat_what_main_action this_action = BPSTAT_WHAT_KEEP_CHECKING; |
| 4427 | enum bptype bptype; |
| 4428 | |
| 4429 | if (bs->breakpoint_at == NULL) |
| 4430 | { |
| 4431 | /* I suspect this can happen if it was a momentary |
| 4432 | breakpoint which has since been deleted. */ |
| 4433 | bptype = bp_none; |
| 4434 | } |
| 4435 | else if (bs->breakpoint_at == NULL) |
| 4436 | bptype = bp_none; |
| 4437 | else |
| 4438 | bptype = bs->breakpoint_at->type; |
| 4439 | |
| 4440 | switch (bptype) |
| 4441 | { |
| 4442 | case bp_none: |
| 4443 | break; |
| 4444 | case bp_breakpoint: |
| 4445 | case bp_hardware_breakpoint: |
| 4446 | case bp_until: |
| 4447 | case bp_finish: |
| 4448 | if (bs->stop) |
| 4449 | { |
| 4450 | if (bs->print) |
| 4451 | this_action = BPSTAT_WHAT_STOP_NOISY; |
| 4452 | else |
| 4453 | this_action = BPSTAT_WHAT_STOP_SILENT; |
| 4454 | } |
| 4455 | else |
| 4456 | this_action = BPSTAT_WHAT_SINGLE; |
| 4457 | break; |
| 4458 | case bp_watchpoint: |
| 4459 | case bp_hardware_watchpoint: |
| 4460 | case bp_read_watchpoint: |
| 4461 | case bp_access_watchpoint: |
| 4462 | if (bs->stop) |
| 4463 | { |
| 4464 | if (bs->print) |
| 4465 | this_action = BPSTAT_WHAT_STOP_NOISY; |
| 4466 | else |
| 4467 | this_action = BPSTAT_WHAT_STOP_SILENT; |
| 4468 | } |
| 4469 | else |
| 4470 | { |
| 4471 | /* There was a watchpoint, but we're not stopping. |
| 4472 | This requires no further action. */ |
| 4473 | } |
| 4474 | break; |
| 4475 | case bp_longjmp: |
| 4476 | case bp_exception: |
| 4477 | this_action = BPSTAT_WHAT_SET_LONGJMP_RESUME; |
| 4478 | retval.is_longjmp = bptype == bp_longjmp; |
| 4479 | break; |
| 4480 | case bp_longjmp_resume: |
| 4481 | case bp_exception_resume: |
| 4482 | this_action = BPSTAT_WHAT_CLEAR_LONGJMP_RESUME; |
| 4483 | retval.is_longjmp = bptype == bp_longjmp_resume; |
| 4484 | break; |
| 4485 | case bp_step_resume: |
| 4486 | if (bs->stop) |
| 4487 | this_action = BPSTAT_WHAT_STEP_RESUME; |
| 4488 | else |
| 4489 | { |
| 4490 | /* It is for the wrong frame. */ |
| 4491 | this_action = BPSTAT_WHAT_SINGLE; |
| 4492 | } |
| 4493 | break; |
| 4494 | case bp_hp_step_resume: |
| 4495 | if (bs->stop) |
| 4496 | this_action = BPSTAT_WHAT_HP_STEP_RESUME; |
| 4497 | else |
| 4498 | { |
| 4499 | /* It is for the wrong frame. */ |
| 4500 | this_action = BPSTAT_WHAT_SINGLE; |
| 4501 | } |
| 4502 | break; |
| 4503 | case bp_watchpoint_scope: |
| 4504 | case bp_thread_event: |
| 4505 | case bp_overlay_event: |
| 4506 | case bp_longjmp_master: |
| 4507 | case bp_std_terminate_master: |
| 4508 | case bp_exception_master: |
| 4509 | this_action = BPSTAT_WHAT_SINGLE; |
| 4510 | break; |
| 4511 | case bp_catchpoint: |
| 4512 | if (bs->stop) |
| 4513 | { |
| 4514 | if (bs->print) |
| 4515 | this_action = BPSTAT_WHAT_STOP_NOISY; |
| 4516 | else |
| 4517 | this_action = BPSTAT_WHAT_STOP_SILENT; |
| 4518 | } |
| 4519 | else |
| 4520 | { |
| 4521 | /* There was a catchpoint, but we're not stopping. |
| 4522 | This requires no further action. */ |
| 4523 | } |
| 4524 | break; |
| 4525 | case bp_shlib_event: |
| 4526 | shlib_event = 1; |
| 4527 | |
| 4528 | /* If requested, stop when the dynamic linker notifies GDB |
| 4529 | of events. This allows the user to get control and place |
| 4530 | breakpoints in initializer routines for dynamically |
| 4531 | loaded objects (among other things). */ |
| 4532 | if (stop_on_solib_events) |
| 4533 | this_action = BPSTAT_WHAT_STOP_NOISY; |
| 4534 | else |
| 4535 | this_action = BPSTAT_WHAT_SINGLE; |
| 4536 | break; |
| 4537 | case bp_jit_event: |
| 4538 | jit_event = 1; |
| 4539 | this_action = BPSTAT_WHAT_SINGLE; |
| 4540 | break; |
| 4541 | case bp_call_dummy: |
| 4542 | /* Make sure the action is stop (silent or noisy), |
| 4543 | so infrun.c pops the dummy frame. */ |
| 4544 | retval.call_dummy = STOP_STACK_DUMMY; |
| 4545 | this_action = BPSTAT_WHAT_STOP_SILENT; |
| 4546 | break; |
| 4547 | case bp_std_terminate: |
| 4548 | /* Make sure the action is stop (silent or noisy), |
| 4549 | so infrun.c pops the dummy frame. */ |
| 4550 | retval.call_dummy = STOP_STD_TERMINATE; |
| 4551 | this_action = BPSTAT_WHAT_STOP_SILENT; |
| 4552 | break; |
| 4553 | case bp_tracepoint: |
| 4554 | case bp_fast_tracepoint: |
| 4555 | case bp_static_tracepoint: |
| 4556 | /* Tracepoint hits should not be reported back to GDB, and |
| 4557 | if one got through somehow, it should have been filtered |
| 4558 | out already. */ |
| 4559 | internal_error (__FILE__, __LINE__, |
| 4560 | _("bpstat_what: tracepoint encountered")); |
| 4561 | break; |
| 4562 | case bp_gnu_ifunc_resolver: |
| 4563 | /* Step over it (and insert bp_gnu_ifunc_resolver_return). */ |
| 4564 | this_action = BPSTAT_WHAT_SINGLE; |
| 4565 | break; |
| 4566 | case bp_gnu_ifunc_resolver_return: |
| 4567 | /* The breakpoint will be removed, execution will restart from the |
| 4568 | PC of the former breakpoint. */ |
| 4569 | this_action = BPSTAT_WHAT_KEEP_CHECKING; |
| 4570 | break; |
| 4571 | default: |
| 4572 | internal_error (__FILE__, __LINE__, |
| 4573 | _("bpstat_what: unhandled bptype %d"), (int) bptype); |
| 4574 | } |
| 4575 | |
| 4576 | retval.main_action = max (retval.main_action, this_action); |
| 4577 | } |
| 4578 | |
| 4579 | /* These operations may affect the bs->breakpoint_at state so they are |
| 4580 | delayed after MAIN_ACTION is decided above. */ |
| 4581 | |
| 4582 | if (shlib_event) |
| 4583 | { |
| 4584 | if (debug_infrun) |
| 4585 | fprintf_unfiltered (gdb_stdlog, "bpstat_what: bp_shlib_event\n"); |
| 4586 | |
| 4587 | /* Check for any newly added shared libraries if we're supposed |
| 4588 | to be adding them automatically. */ |
| 4589 | |
| 4590 | /* Switch terminal for any messages produced by |
| 4591 | breakpoint_re_set. */ |
| 4592 | target_terminal_ours_for_output (); |
| 4593 | |
| 4594 | #ifdef SOLIB_ADD |
| 4595 | SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add); |
| 4596 | #else |
| 4597 | solib_add (NULL, 0, ¤t_target, auto_solib_add); |
| 4598 | #endif |
| 4599 | |
| 4600 | target_terminal_inferior (); |
| 4601 | } |
| 4602 | |
| 4603 | if (jit_event) |
| 4604 | { |
| 4605 | if (debug_infrun) |
| 4606 | fprintf_unfiltered (gdb_stdlog, "bpstat_what: bp_jit_event\n"); |
| 4607 | |
| 4608 | handle_jit_event (); |
| 4609 | } |
| 4610 | |
| 4611 | for (bs = bs_head; bs != NULL; bs = bs->next) |
| 4612 | { |
| 4613 | struct breakpoint *b = bs->breakpoint_at; |
| 4614 | |
| 4615 | if (b == NULL) |
| 4616 | continue; |
| 4617 | switch (b->type) |
| 4618 | { |
| 4619 | case bp_gnu_ifunc_resolver: |
| 4620 | gnu_ifunc_resolver_stop (b); |
| 4621 | break; |
| 4622 | case bp_gnu_ifunc_resolver_return: |
| 4623 | gnu_ifunc_resolver_return_stop (b); |
| 4624 | break; |
| 4625 | } |
| 4626 | } |
| 4627 | |
| 4628 | return retval; |
| 4629 | } |
| 4630 | |
| 4631 | /* Nonzero if we should step constantly (e.g. watchpoints on machines |
| 4632 | without hardware support). This isn't related to a specific bpstat, |
| 4633 | just to things like whether watchpoints are set. */ |
| 4634 | |
| 4635 | int |
| 4636 | bpstat_should_step (void) |
| 4637 | { |
| 4638 | struct breakpoint *b; |
| 4639 | |
| 4640 | ALL_BREAKPOINTS (b) |
| 4641 | if (breakpoint_enabled (b) && b->type == bp_watchpoint && b->loc != NULL) |
| 4642 | return 1; |
| 4643 | return 0; |
| 4644 | } |
| 4645 | |
| 4646 | int |
| 4647 | bpstat_causes_stop (bpstat bs) |
| 4648 | { |
| 4649 | for (; bs != NULL; bs = bs->next) |
| 4650 | if (bs->stop) |
| 4651 | return 1; |
| 4652 | |
| 4653 | return 0; |
| 4654 | } |
| 4655 | |
| 4656 | \f |
| 4657 | |
| 4658 | /* Compute a string of spaces suitable to indent the next line |
| 4659 | so it starts at the position corresponding to the table column |
| 4660 | named COL_NAME in the currently active table of UIOUT. */ |
| 4661 | |
| 4662 | static char * |
| 4663 | wrap_indent_at_field (struct ui_out *uiout, const char *col_name) |
| 4664 | { |
| 4665 | static char wrap_indent[80]; |
| 4666 | int i, total_width, width, align; |
| 4667 | char *text; |
| 4668 | |
| 4669 | total_width = 0; |
| 4670 | for (i = 1; ui_out_query_field (uiout, i, &width, &align, &text); i++) |
| 4671 | { |
| 4672 | if (strcmp (text, col_name) == 0) |
| 4673 | { |
| 4674 | gdb_assert (total_width < sizeof wrap_indent); |
| 4675 | memset (wrap_indent, ' ', total_width); |
| 4676 | wrap_indent[total_width] = 0; |
| 4677 | |
| 4678 | return wrap_indent; |
| 4679 | } |
| 4680 | |
| 4681 | total_width += width + 1; |
| 4682 | } |
| 4683 | |
| 4684 | return NULL; |
| 4685 | } |
| 4686 | |
| 4687 | /* Print the LOC location out of the list of B->LOC locations. */ |
| 4688 | |
| 4689 | static void |
| 4690 | print_breakpoint_location (struct breakpoint *b, |
| 4691 | struct bp_location *loc) |
| 4692 | { |
| 4693 | struct cleanup *old_chain = save_current_program_space (); |
| 4694 | |
| 4695 | if (loc != NULL && loc->shlib_disabled) |
| 4696 | loc = NULL; |
| 4697 | |
| 4698 | if (loc != NULL) |
| 4699 | set_current_program_space (loc->pspace); |
| 4700 | |
| 4701 | if (b->display_canonical) |
| 4702 | ui_out_field_string (uiout, "what", b->addr_string); |
| 4703 | else if (b->source_file && loc) |
| 4704 | { |
| 4705 | struct symbol *sym |
| 4706 | = find_pc_sect_function (loc->address, loc->section); |
| 4707 | if (sym) |
| 4708 | { |
| 4709 | ui_out_text (uiout, "in "); |
| 4710 | ui_out_field_string (uiout, "func", |
| 4711 | SYMBOL_PRINT_NAME (sym)); |
| 4712 | ui_out_text (uiout, " "); |
| 4713 | ui_out_wrap_hint (uiout, wrap_indent_at_field (uiout, "what")); |
| 4714 | ui_out_text (uiout, "at "); |
| 4715 | } |
| 4716 | ui_out_field_string (uiout, "file", b->source_file); |
| 4717 | ui_out_text (uiout, ":"); |
| 4718 | |
| 4719 | if (ui_out_is_mi_like_p (uiout)) |
| 4720 | { |
| 4721 | struct symtab_and_line sal = find_pc_line (loc->address, 0); |
| 4722 | char *fullname = symtab_to_fullname (sal.symtab); |
| 4723 | |
| 4724 | if (fullname) |
| 4725 | ui_out_field_string (uiout, "fullname", fullname); |
| 4726 | } |
| 4727 | |
| 4728 | ui_out_field_int (uiout, "line", b->line_number); |
| 4729 | } |
| 4730 | else if (loc) |
| 4731 | { |
| 4732 | struct ui_stream *stb = ui_out_stream_new (uiout); |
| 4733 | struct cleanup *stb_chain = make_cleanup_ui_out_stream_delete (stb); |
| 4734 | |
| 4735 | print_address_symbolic (loc->gdbarch, loc->address, stb->stream, |
| 4736 | demangle, ""); |
| 4737 | ui_out_field_stream (uiout, "at", stb); |
| 4738 | |
| 4739 | do_cleanups (stb_chain); |
| 4740 | } |
| 4741 | else |
| 4742 | ui_out_field_string (uiout, "pending", b->addr_string); |
| 4743 | |
| 4744 | do_cleanups (old_chain); |
| 4745 | } |
| 4746 | |
| 4747 | static const char * |
| 4748 | bptype_string (enum bptype type) |
| 4749 | { |
| 4750 | struct ep_type_description |
| 4751 | { |
| 4752 | enum bptype type; |
| 4753 | char *description; |
| 4754 | }; |
| 4755 | static struct ep_type_description bptypes[] = |
| 4756 | { |
| 4757 | {bp_none, "?deleted?"}, |
| 4758 | {bp_breakpoint, "breakpoint"}, |
| 4759 | {bp_hardware_breakpoint, "hw breakpoint"}, |
| 4760 | {bp_until, "until"}, |
| 4761 | {bp_finish, "finish"}, |
| 4762 | {bp_watchpoint, "watchpoint"}, |
| 4763 | {bp_hardware_watchpoint, "hw watchpoint"}, |
| 4764 | {bp_read_watchpoint, "read watchpoint"}, |
| 4765 | {bp_access_watchpoint, "acc watchpoint"}, |
| 4766 | {bp_longjmp, "longjmp"}, |
| 4767 | {bp_longjmp_resume, "longjmp resume"}, |
| 4768 | {bp_exception, "exception"}, |
| 4769 | {bp_exception_resume, "exception resume"}, |
| 4770 | {bp_step_resume, "step resume"}, |
| 4771 | {bp_hp_step_resume, "high-priority step resume"}, |
| 4772 | {bp_watchpoint_scope, "watchpoint scope"}, |
| 4773 | {bp_call_dummy, "call dummy"}, |
| 4774 | {bp_std_terminate, "std::terminate"}, |
| 4775 | {bp_shlib_event, "shlib events"}, |
| 4776 | {bp_thread_event, "thread events"}, |
| 4777 | {bp_overlay_event, "overlay events"}, |
| 4778 | {bp_longjmp_master, "longjmp master"}, |
| 4779 | {bp_std_terminate_master, "std::terminate master"}, |
| 4780 | {bp_exception_master, "exception master"}, |
| 4781 | {bp_catchpoint, "catchpoint"}, |
| 4782 | {bp_tracepoint, "tracepoint"}, |
| 4783 | {bp_fast_tracepoint, "fast tracepoint"}, |
| 4784 | {bp_static_tracepoint, "static tracepoint"}, |
| 4785 | {bp_jit_event, "jit events"}, |
| 4786 | {bp_gnu_ifunc_resolver, "STT_GNU_IFUNC resolver"}, |
| 4787 | {bp_gnu_ifunc_resolver_return, "STT_GNU_IFUNC resolver return"}, |
| 4788 | }; |
| 4789 | |
| 4790 | if (((int) type >= (sizeof (bptypes) / sizeof (bptypes[0]))) |
| 4791 | || ((int) type != bptypes[(int) type].type)) |
| 4792 | internal_error (__FILE__, __LINE__, |
| 4793 | _("bptypes table does not describe type #%d."), |
| 4794 | (int) type); |
| 4795 | |
| 4796 | return bptypes[(int) type].description; |
| 4797 | } |
| 4798 | |
| 4799 | /* Print B to gdb_stdout. */ |
| 4800 | |
| 4801 | static void |
| 4802 | print_one_breakpoint_location (struct breakpoint *b, |
| 4803 | struct bp_location *loc, |
| 4804 | int loc_number, |
| 4805 | struct bp_location **last_loc, |
| 4806 | int allflag) |
| 4807 | { |
| 4808 | struct command_line *l; |
| 4809 | static char bpenables[] = "nynny"; |
| 4810 | |
| 4811 | int header_of_multiple = 0; |
| 4812 | int part_of_multiple = (loc != NULL); |
| 4813 | struct value_print_options opts; |
| 4814 | |
| 4815 | get_user_print_options (&opts); |
| 4816 | |
| 4817 | gdb_assert (!loc || loc_number != 0); |
| 4818 | /* See comment in print_one_breakpoint concerning treatment of |
| 4819 | breakpoints with single disabled location. */ |
| 4820 | if (loc == NULL |
| 4821 | && (b->loc != NULL |
| 4822 | && (b->loc->next != NULL || !b->loc->enabled))) |
| 4823 | header_of_multiple = 1; |
| 4824 | if (loc == NULL) |
| 4825 | loc = b->loc; |
| 4826 | |
| 4827 | annotate_record (); |
| 4828 | |
| 4829 | /* 1 */ |
| 4830 | annotate_field (0); |
| 4831 | if (part_of_multiple) |
| 4832 | { |
| 4833 | char *formatted; |
| 4834 | formatted = xstrprintf ("%d.%d", b->number, loc_number); |
| 4835 | ui_out_field_string (uiout, "number", formatted); |
| 4836 | xfree (formatted); |
| 4837 | } |
| 4838 | else |
| 4839 | { |
| 4840 | ui_out_field_int (uiout, "number", b->number); |
| 4841 | } |
| 4842 | |
| 4843 | /* 2 */ |
| 4844 | annotate_field (1); |
| 4845 | if (part_of_multiple) |
| 4846 | ui_out_field_skip (uiout, "type"); |
| 4847 | else |
| 4848 | ui_out_field_string (uiout, "type", bptype_string (b->type)); |
| 4849 | |
| 4850 | /* 3 */ |
| 4851 | annotate_field (2); |
| 4852 | if (part_of_multiple) |
| 4853 | ui_out_field_skip (uiout, "disp"); |
| 4854 | else |
| 4855 | ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| 4856 | |
| 4857 | |
| 4858 | /* 4 */ |
| 4859 | annotate_field (3); |
| 4860 | if (part_of_multiple) |
| 4861 | ui_out_field_string (uiout, "enabled", loc->enabled ? "y" : "n"); |
| 4862 | else |
| 4863 | ui_out_field_fmt (uiout, "enabled", "%c", |
| 4864 | bpenables[(int) b->enable_state]); |
| 4865 | ui_out_spaces (uiout, 2); |
| 4866 | |
| 4867 | |
| 4868 | /* 5 and 6 */ |
| 4869 | if (b->ops != NULL && b->ops->print_one != NULL) |
| 4870 | { |
| 4871 | /* Although the print_one can possibly print all locations, |
| 4872 | calling it here is not likely to get any nice result. So, |
| 4873 | make sure there's just one location. */ |
| 4874 | gdb_assert (b->loc == NULL || b->loc->next == NULL); |
| 4875 | b->ops->print_one (b, last_loc); |
| 4876 | } |
| 4877 | else |
| 4878 | switch (b->type) |
| 4879 | { |
| 4880 | case bp_none: |
| 4881 | internal_error (__FILE__, __LINE__, |
| 4882 | _("print_one_breakpoint: bp_none encountered\n")); |
| 4883 | break; |
| 4884 | |
| 4885 | case bp_watchpoint: |
| 4886 | case bp_hardware_watchpoint: |
| 4887 | case bp_read_watchpoint: |
| 4888 | case bp_access_watchpoint: |
| 4889 | /* Field 4, the address, is omitted (which makes the columns |
| 4890 | not line up too nicely with the headers, but the effect |
| 4891 | is relatively readable). */ |
| 4892 | if (opts.addressprint) |
| 4893 | ui_out_field_skip (uiout, "addr"); |
| 4894 | annotate_field (5); |
| 4895 | ui_out_field_string (uiout, "what", b->exp_string); |
| 4896 | break; |
| 4897 | |
| 4898 | case bp_breakpoint: |
| 4899 | case bp_hardware_breakpoint: |
| 4900 | case bp_until: |
| 4901 | case bp_finish: |
| 4902 | case bp_longjmp: |
| 4903 | case bp_longjmp_resume: |
| 4904 | case bp_exception: |
| 4905 | case bp_exception_resume: |
| 4906 | case bp_step_resume: |
| 4907 | case bp_hp_step_resume: |
| 4908 | case bp_watchpoint_scope: |
| 4909 | case bp_call_dummy: |
| 4910 | case bp_std_terminate: |
| 4911 | case bp_shlib_event: |
| 4912 | case bp_thread_event: |
| 4913 | case bp_overlay_event: |
| 4914 | case bp_longjmp_master: |
| 4915 | case bp_std_terminate_master: |
| 4916 | case bp_exception_master: |
| 4917 | case bp_tracepoint: |
| 4918 | case bp_fast_tracepoint: |
| 4919 | case bp_static_tracepoint: |
| 4920 | case bp_jit_event: |
| 4921 | case bp_gnu_ifunc_resolver: |
| 4922 | case bp_gnu_ifunc_resolver_return: |
| 4923 | if (opts.addressprint) |
| 4924 | { |
| 4925 | annotate_field (4); |
| 4926 | if (header_of_multiple) |
| 4927 | ui_out_field_string (uiout, "addr", "<MULTIPLE>"); |
| 4928 | else if (b->loc == NULL || loc->shlib_disabled) |
| 4929 | ui_out_field_string (uiout, "addr", "<PENDING>"); |
| 4930 | else |
| 4931 | ui_out_field_core_addr (uiout, "addr", |
| 4932 | loc->gdbarch, loc->address); |
| 4933 | } |
| 4934 | annotate_field (5); |
| 4935 | if (!header_of_multiple) |
| 4936 | print_breakpoint_location (b, loc); |
| 4937 | if (b->loc) |
| 4938 | *last_loc = b->loc; |
| 4939 | break; |
| 4940 | } |
| 4941 | |
| 4942 | |
| 4943 | /* For backward compatibility, don't display inferiors unless there |
| 4944 | are several. */ |
| 4945 | if (loc != NULL |
| 4946 | && !header_of_multiple |
| 4947 | && (allflag |
| 4948 | || (!gdbarch_has_global_breakpoints (target_gdbarch) |
| 4949 | && (number_of_program_spaces () > 1 |
| 4950 | || number_of_inferiors () > 1) |
| 4951 | /* LOC is for existing B, it cannot be in |
| 4952 | moribund_locations and thus having NULL OWNER. */ |
| 4953 | && loc->owner->type != bp_catchpoint))) |
| 4954 | { |
| 4955 | struct inferior *inf; |
| 4956 | int first = 1; |
| 4957 | |
| 4958 | for (inf = inferior_list; inf != NULL; inf = inf->next) |
| 4959 | { |
| 4960 | if (inf->pspace == loc->pspace) |
| 4961 | { |
| 4962 | if (first) |
| 4963 | { |
| 4964 | first = 0; |
| 4965 | ui_out_text (uiout, " inf "); |
| 4966 | } |
| 4967 | else |
| 4968 | ui_out_text (uiout, ", "); |
| 4969 | ui_out_text (uiout, plongest (inf->num)); |
| 4970 | } |
| 4971 | } |
| 4972 | } |
| 4973 | |
| 4974 | if (!part_of_multiple) |
| 4975 | { |
| 4976 | if (b->thread != -1) |
| 4977 | { |
| 4978 | /* FIXME: This seems to be redundant and lost here; see the |
| 4979 | "stop only in" line a little further down. */ |
| 4980 | ui_out_text (uiout, " thread "); |
| 4981 | ui_out_field_int (uiout, "thread", b->thread); |
| 4982 | } |
| 4983 | else if (b->task != 0) |
| 4984 | { |
| 4985 | ui_out_text (uiout, " task "); |
| 4986 | ui_out_field_int (uiout, "task", b->task); |
| 4987 | } |
| 4988 | } |
| 4989 | |
| 4990 | ui_out_text (uiout, "\n"); |
| 4991 | |
| 4992 | if (!part_of_multiple && b->ops && b->ops->print_one_detail) |
| 4993 | b->ops->print_one_detail (b, uiout); |
| 4994 | |
| 4995 | if (!part_of_multiple && b->static_trace_marker_id) |
| 4996 | { |
| 4997 | gdb_assert (b->type == bp_static_tracepoint); |
| 4998 | |
| 4999 | ui_out_text (uiout, "\tmarker id is "); |
| 5000 | ui_out_field_string (uiout, "static-tracepoint-marker-string-id", |
| 5001 | b->static_trace_marker_id); |
| 5002 | ui_out_text (uiout, "\n"); |
| 5003 | } |
| 5004 | |
| 5005 | if (part_of_multiple && frame_id_p (b->frame_id)) |
| 5006 | { |
| 5007 | annotate_field (6); |
| 5008 | ui_out_text (uiout, "\tstop only in stack frame at "); |
| 5009 | /* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside |
| 5010 | the frame ID. */ |
| 5011 | ui_out_field_core_addr (uiout, "frame", |
| 5012 | b->gdbarch, b->frame_id.stack_addr); |
| 5013 | ui_out_text (uiout, "\n"); |
| 5014 | } |
| 5015 | |
| 5016 | if (!part_of_multiple && b->cond_string && !ada_exception_catchpoint_p (b)) |
| 5017 | { |
| 5018 | /* We do not print the condition for Ada exception catchpoints |
| 5019 | because the condition is an internal implementation detail |
| 5020 | that we do not want to expose to the user. */ |
| 5021 | annotate_field (7); |
| 5022 | if (is_tracepoint (b)) |
| 5023 | ui_out_text (uiout, "\ttrace only if "); |
| 5024 | else |
| 5025 | ui_out_text (uiout, "\tstop only if "); |
| 5026 | ui_out_field_string (uiout, "cond", b->cond_string); |
| 5027 | ui_out_text (uiout, "\n"); |
| 5028 | } |
| 5029 | |
| 5030 | if (!part_of_multiple && b->thread != -1) |
| 5031 | { |
| 5032 | /* FIXME should make an annotation for this. */ |
| 5033 | ui_out_text (uiout, "\tstop only in thread "); |
| 5034 | ui_out_field_int (uiout, "thread", b->thread); |
| 5035 | ui_out_text (uiout, "\n"); |
| 5036 | } |
| 5037 | |
| 5038 | if (!part_of_multiple && b->hit_count) |
| 5039 | { |
| 5040 | /* FIXME should make an annotation for this. */ |
| 5041 | if (ep_is_catchpoint (b)) |
| 5042 | ui_out_text (uiout, "\tcatchpoint"); |
| 5043 | else |
| 5044 | ui_out_text (uiout, "\tbreakpoint"); |
| 5045 | ui_out_text (uiout, " already hit "); |
| 5046 | ui_out_field_int (uiout, "times", b->hit_count); |
| 5047 | if (b->hit_count == 1) |
| 5048 | ui_out_text (uiout, " time\n"); |
| 5049 | else |
| 5050 | ui_out_text (uiout, " times\n"); |
| 5051 | } |
| 5052 | |
| 5053 | /* Output the count also if it is zero, but only if this is mi. |
| 5054 | FIXME: Should have a better test for this. */ |
| 5055 | if (ui_out_is_mi_like_p (uiout)) |
| 5056 | if (!part_of_multiple && b->hit_count == 0) |
| 5057 | ui_out_field_int (uiout, "times", b->hit_count); |
| 5058 | |
| 5059 | if (!part_of_multiple && b->ignore_count) |
| 5060 | { |
| 5061 | annotate_field (8); |
| 5062 | ui_out_text (uiout, "\tignore next "); |
| 5063 | ui_out_field_int (uiout, "ignore", b->ignore_count); |
| 5064 | ui_out_text (uiout, " hits\n"); |
| 5065 | } |
| 5066 | |
| 5067 | l = b->commands ? b->commands->commands : NULL; |
| 5068 | if (!part_of_multiple && l) |
| 5069 | { |
| 5070 | struct cleanup *script_chain; |
| 5071 | |
| 5072 | annotate_field (9); |
| 5073 | script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script"); |
| 5074 | print_command_lines (uiout, l, 4); |
| 5075 | do_cleanups (script_chain); |
| 5076 | } |
| 5077 | |
| 5078 | if (!part_of_multiple && b->pass_count) |
| 5079 | { |
| 5080 | annotate_field (10); |
| 5081 | ui_out_text (uiout, "\tpass count "); |
| 5082 | ui_out_field_int (uiout, "pass", b->pass_count); |
| 5083 | ui_out_text (uiout, " \n"); |
| 5084 | } |
| 5085 | |
| 5086 | if (ui_out_is_mi_like_p (uiout) && !part_of_multiple) |
| 5087 | { |
| 5088 | if (b->addr_string) |
| 5089 | ui_out_field_string (uiout, "original-location", b->addr_string); |
| 5090 | else if (b->exp_string) |
| 5091 | ui_out_field_string (uiout, "original-location", b->exp_string); |
| 5092 | } |
| 5093 | } |
| 5094 | |
| 5095 | static void |
| 5096 | print_one_breakpoint (struct breakpoint *b, |
| 5097 | struct bp_location **last_loc, |
| 5098 | int allflag) |
| 5099 | { |
| 5100 | struct cleanup *bkpt_chain; |
| 5101 | |
| 5102 | bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt"); |
| 5103 | |
| 5104 | print_one_breakpoint_location (b, NULL, 0, last_loc, allflag); |
| 5105 | do_cleanups (bkpt_chain); |
| 5106 | |
| 5107 | /* If this breakpoint has custom print function, |
| 5108 | it's already printed. Otherwise, print individual |
| 5109 | locations, if any. */ |
| 5110 | if (b->ops == NULL || b->ops->print_one == NULL) |
| 5111 | { |
| 5112 | /* If breakpoint has a single location that is disabled, we |
| 5113 | print it as if it had several locations, since otherwise it's |
| 5114 | hard to represent "breakpoint enabled, location disabled" |
| 5115 | situation. |
| 5116 | |
| 5117 | Note that while hardware watchpoints have several locations |
| 5118 | internally, that's not a property exposed to user. */ |
| 5119 | if (b->loc |
| 5120 | && !is_hardware_watchpoint (b) |
| 5121 | && (b->loc->next || !b->loc->enabled)) |
| 5122 | { |
| 5123 | struct bp_location *loc; |
| 5124 | int n = 1; |
| 5125 | |
| 5126 | for (loc = b->loc; loc; loc = loc->next, ++n) |
| 5127 | { |
| 5128 | struct cleanup *inner2 = |
| 5129 | make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| 5130 | print_one_breakpoint_location (b, loc, n, last_loc, allflag); |
| 5131 | do_cleanups (inner2); |
| 5132 | } |
| 5133 | } |
| 5134 | } |
| 5135 | } |
| 5136 | |
| 5137 | static int |
| 5138 | breakpoint_address_bits (struct breakpoint *b) |
| 5139 | { |
| 5140 | int print_address_bits = 0; |
| 5141 | struct bp_location *loc; |
| 5142 | |
| 5143 | for (loc = b->loc; loc; loc = loc->next) |
| 5144 | { |
| 5145 | int addr_bit; |
| 5146 | |
| 5147 | /* Software watchpoints that aren't watching memory don't have |
| 5148 | an address to print. */ |
| 5149 | if (b->type == bp_watchpoint && loc->watchpoint_type == -1) |
| 5150 | continue; |
| 5151 | |
| 5152 | addr_bit = gdbarch_addr_bit (loc->gdbarch); |
| 5153 | if (addr_bit > print_address_bits) |
| 5154 | print_address_bits = addr_bit; |
| 5155 | } |
| 5156 | |
| 5157 | return print_address_bits; |
| 5158 | } |
| 5159 | |
| 5160 | struct captured_breakpoint_query_args |
| 5161 | { |
| 5162 | int bnum; |
| 5163 | }; |
| 5164 | |
| 5165 | static int |
| 5166 | do_captured_breakpoint_query (struct ui_out *uiout, void *data) |
| 5167 | { |
| 5168 | struct captured_breakpoint_query_args *args = data; |
| 5169 | struct breakpoint *b; |
| 5170 | struct bp_location *dummy_loc = NULL; |
| 5171 | |
| 5172 | ALL_BREAKPOINTS (b) |
| 5173 | { |
| 5174 | if (args->bnum == b->number) |
| 5175 | { |
| 5176 | print_one_breakpoint (b, &dummy_loc, 0); |
| 5177 | return GDB_RC_OK; |
| 5178 | } |
| 5179 | } |
| 5180 | return GDB_RC_NONE; |
| 5181 | } |
| 5182 | |
| 5183 | enum gdb_rc |
| 5184 | gdb_breakpoint_query (struct ui_out *uiout, int bnum, |
| 5185 | char **error_message) |
| 5186 | { |
| 5187 | struct captured_breakpoint_query_args args; |
| 5188 | |
| 5189 | args.bnum = bnum; |
| 5190 | /* For the moment we don't trust print_one_breakpoint() to not throw |
| 5191 | an error. */ |
| 5192 | if (catch_exceptions_with_msg (uiout, do_captured_breakpoint_query, &args, |
| 5193 | error_message, RETURN_MASK_ALL) < 0) |
| 5194 | return GDB_RC_FAIL; |
| 5195 | else |
| 5196 | return GDB_RC_OK; |
| 5197 | } |
| 5198 | |
| 5199 | /* Return true if this breakpoint was set by the user, false if it is |
| 5200 | internal or momentary. */ |
| 5201 | |
| 5202 | int |
| 5203 | user_breakpoint_p (struct breakpoint *b) |
| 5204 | { |
| 5205 | return b->number > 0; |
| 5206 | } |
| 5207 | |
| 5208 | /* Print information on user settable breakpoint (watchpoint, etc) |
| 5209 | number BNUM. If BNUM is -1 print all user-settable breakpoints. |
| 5210 | If ALLFLAG is non-zero, include non-user-settable breakpoints. If |
| 5211 | FILTER is non-NULL, call it on each breakpoint and only include the |
| 5212 | ones for which it returns non-zero. Return the total number of |
| 5213 | breakpoints listed. */ |
| 5214 | |
| 5215 | static int |
| 5216 | breakpoint_1 (char *args, int allflag, |
| 5217 | int (*filter) (const struct breakpoint *)) |
| 5218 | { |
| 5219 | struct breakpoint *b; |
| 5220 | struct bp_location *last_loc = NULL; |
| 5221 | int nr_printable_breakpoints; |
| 5222 | struct cleanup *bkpttbl_chain; |
| 5223 | struct value_print_options opts; |
| 5224 | int print_address_bits = 0; |
| 5225 | int print_type_col_width = 14; |
| 5226 | |
| 5227 | get_user_print_options (&opts); |
| 5228 | |
| 5229 | /* Compute the number of rows in the table, as well as the size |
| 5230 | required for address fields. */ |
| 5231 | nr_printable_breakpoints = 0; |
| 5232 | ALL_BREAKPOINTS (b) |
| 5233 | { |
| 5234 | /* If we have a filter, only list the breakpoints it accepts. */ |
| 5235 | if (filter && !filter (b)) |
| 5236 | continue; |
| 5237 | |
| 5238 | /* If we have an "args" string, it is a list of breakpoints to |
| 5239 | accept. Skip the others. */ |
| 5240 | if (args != NULL && *args != '\0') |
| 5241 | { |
| 5242 | if (allflag && parse_and_eval_long (args) != b->number) |
| 5243 | continue; |
| 5244 | if (!allflag && !number_is_in_list (args, b->number)) |
| 5245 | continue; |
| 5246 | } |
| 5247 | |
| 5248 | if (allflag || user_breakpoint_p (b)) |
| 5249 | { |
| 5250 | int addr_bit, type_len; |
| 5251 | |
| 5252 | addr_bit = breakpoint_address_bits (b); |
| 5253 | if (addr_bit > print_address_bits) |
| 5254 | print_address_bits = addr_bit; |
| 5255 | |
| 5256 | type_len = strlen (bptype_string (b->type)); |
| 5257 | if (type_len > print_type_col_width) |
| 5258 | print_type_col_width = type_len; |
| 5259 | |
| 5260 | nr_printable_breakpoints++; |
| 5261 | } |
| 5262 | } |
| 5263 | |
| 5264 | if (opts.addressprint) |
| 5265 | bkpttbl_chain |
| 5266 | = make_cleanup_ui_out_table_begin_end (uiout, 6, |
| 5267 | nr_printable_breakpoints, |
| 5268 | "BreakpointTable"); |
| 5269 | else |
| 5270 | bkpttbl_chain |
| 5271 | = make_cleanup_ui_out_table_begin_end (uiout, 5, |
| 5272 | nr_printable_breakpoints, |
| 5273 | "BreakpointTable"); |
| 5274 | |
| 5275 | if (nr_printable_breakpoints > 0) |
| 5276 | annotate_breakpoints_headers (); |
| 5277 | if (nr_printable_breakpoints > 0) |
| 5278 | annotate_field (0); |
| 5279 | ui_out_table_header (uiout, 7, ui_left, "number", "Num"); /* 1 */ |
| 5280 | if (nr_printable_breakpoints > 0) |
| 5281 | annotate_field (1); |
| 5282 | ui_out_table_header (uiout, print_type_col_width, ui_left, |
| 5283 | "type", "Type"); /* 2 */ |
| 5284 | if (nr_printable_breakpoints > 0) |
| 5285 | annotate_field (2); |
| 5286 | ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */ |
| 5287 | if (nr_printable_breakpoints > 0) |
| 5288 | annotate_field (3); |
| 5289 | ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */ |
| 5290 | if (opts.addressprint) |
| 5291 | { |
| 5292 | if (nr_printable_breakpoints > 0) |
| 5293 | annotate_field (4); |
| 5294 | if (print_address_bits <= 32) |
| 5295 | ui_out_table_header (uiout, 10, ui_left, |
| 5296 | "addr", "Address"); /* 5 */ |
| 5297 | else |
| 5298 | ui_out_table_header (uiout, 18, ui_left, |
| 5299 | "addr", "Address"); /* 5 */ |
| 5300 | } |
| 5301 | if (nr_printable_breakpoints > 0) |
| 5302 | annotate_field (5); |
| 5303 | ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */ |
| 5304 | ui_out_table_body (uiout); |
| 5305 | if (nr_printable_breakpoints > 0) |
| 5306 | annotate_breakpoints_table (); |
| 5307 | |
| 5308 | ALL_BREAKPOINTS (b) |
| 5309 | { |
| 5310 | QUIT; |
| 5311 | /* If we have a filter, only list the breakpoints it accepts. */ |
| 5312 | if (filter && !filter (b)) |
| 5313 | continue; |
| 5314 | |
| 5315 | /* If we have an "args" string, it is a list of breakpoints to |
| 5316 | accept. Skip the others. */ |
| 5317 | |
| 5318 | if (args != NULL && *args != '\0') |
| 5319 | { |
| 5320 | if (allflag) /* maintenance info breakpoint */ |
| 5321 | { |
| 5322 | if (parse_and_eval_long (args) != b->number) |
| 5323 | continue; |
| 5324 | } |
| 5325 | else /* all others */ |
| 5326 | { |
| 5327 | if (!number_is_in_list (args, b->number)) |
| 5328 | continue; |
| 5329 | } |
| 5330 | } |
| 5331 | /* We only print out user settable breakpoints unless the |
| 5332 | allflag is set. */ |
| 5333 | if (allflag || user_breakpoint_p (b)) |
| 5334 | print_one_breakpoint (b, &last_loc, allflag); |
| 5335 | } |
| 5336 | |
| 5337 | do_cleanups (bkpttbl_chain); |
| 5338 | |
| 5339 | if (nr_printable_breakpoints == 0) |
| 5340 | { |
| 5341 | /* If there's a filter, let the caller decide how to report |
| 5342 | empty list. */ |
| 5343 | if (!filter) |
| 5344 | { |
| 5345 | if (args == NULL || *args == '\0') |
| 5346 | ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n"); |
| 5347 | else |
| 5348 | ui_out_message (uiout, 0, |
| 5349 | "No breakpoint or watchpoint matching '%s'.\n", |
| 5350 | args); |
| 5351 | } |
| 5352 | } |
| 5353 | else |
| 5354 | { |
| 5355 | if (last_loc && !server_command) |
| 5356 | set_next_address (last_loc->gdbarch, last_loc->address); |
| 5357 | } |
| 5358 | |
| 5359 | /* FIXME? Should this be moved up so that it is only called when |
| 5360 | there have been breakpoints? */ |
| 5361 | annotate_breakpoints_table_end (); |
| 5362 | |
| 5363 | return nr_printable_breakpoints; |
| 5364 | } |
| 5365 | |
| 5366 | /* Display the value of default-collect in a way that is generally |
| 5367 | compatible with the breakpoint list. */ |
| 5368 | |
| 5369 | static void |
| 5370 | default_collect_info (void) |
| 5371 | { |
| 5372 | /* If it has no value (which is frequently the case), say nothing; a |
| 5373 | message like "No default-collect." gets in user's face when it's |
| 5374 | not wanted. */ |
| 5375 | if (!*default_collect) |
| 5376 | return; |
| 5377 | |
| 5378 | /* The following phrase lines up nicely with per-tracepoint collect |
| 5379 | actions. */ |
| 5380 | ui_out_text (uiout, "default collect "); |
| 5381 | ui_out_field_string (uiout, "default-collect", default_collect); |
| 5382 | ui_out_text (uiout, " \n"); |
| 5383 | } |
| 5384 | |
| 5385 | static void |
| 5386 | breakpoints_info (char *args, int from_tty) |
| 5387 | { |
| 5388 | breakpoint_1 (args, 0, NULL); |
| 5389 | |
| 5390 | default_collect_info (); |
| 5391 | } |
| 5392 | |
| 5393 | static void |
| 5394 | watchpoints_info (char *args, int from_tty) |
| 5395 | { |
| 5396 | int num_printed = breakpoint_1 (args, 0, is_watchpoint); |
| 5397 | |
| 5398 | if (num_printed == 0) |
| 5399 | { |
| 5400 | if (args == NULL || *args == '\0') |
| 5401 | ui_out_message (uiout, 0, "No watchpoints.\n"); |
| 5402 | else |
| 5403 | ui_out_message (uiout, 0, "No watchpoint matching '%s'.\n", args); |
| 5404 | } |
| 5405 | } |
| 5406 | |
| 5407 | static void |
| 5408 | maintenance_info_breakpoints (char *args, int from_tty) |
| 5409 | { |
| 5410 | breakpoint_1 (args, 1, NULL); |
| 5411 | |
| 5412 | default_collect_info (); |
| 5413 | } |
| 5414 | |
| 5415 | static int |
| 5416 | breakpoint_has_pc (struct breakpoint *b, |
| 5417 | struct program_space *pspace, |
| 5418 | CORE_ADDR pc, struct obj_section *section) |
| 5419 | { |
| 5420 | struct bp_location *bl = b->loc; |
| 5421 | |
| 5422 | for (; bl; bl = bl->next) |
| 5423 | { |
| 5424 | if (bl->pspace == pspace |
| 5425 | && bl->address == pc |
| 5426 | && (!overlay_debugging || bl->section == section)) |
| 5427 | return 1; |
| 5428 | } |
| 5429 | return 0; |
| 5430 | } |
| 5431 | |
| 5432 | /* Print a message describing any breakpoints set at PC. This |
| 5433 | concerns with logical breakpoints, so we match program spaces, not |
| 5434 | address spaces. */ |
| 5435 | |
| 5436 | static void |
| 5437 | describe_other_breakpoints (struct gdbarch *gdbarch, |
| 5438 | struct program_space *pspace, CORE_ADDR pc, |
| 5439 | struct obj_section *section, int thread) |
| 5440 | { |
| 5441 | int others = 0; |
| 5442 | struct breakpoint *b; |
| 5443 | |
| 5444 | ALL_BREAKPOINTS (b) |
| 5445 | others += breakpoint_has_pc (b, pspace, pc, section); |
| 5446 | if (others > 0) |
| 5447 | { |
| 5448 | if (others == 1) |
| 5449 | printf_filtered (_("Note: breakpoint ")); |
| 5450 | else /* if (others == ???) */ |
| 5451 | printf_filtered (_("Note: breakpoints ")); |
| 5452 | ALL_BREAKPOINTS (b) |
| 5453 | if (breakpoint_has_pc (b, pspace, pc, section)) |
| 5454 | { |
| 5455 | others--; |
| 5456 | printf_filtered ("%d", b->number); |
| 5457 | if (b->thread == -1 && thread != -1) |
| 5458 | printf_filtered (" (all threads)"); |
| 5459 | else if (b->thread != -1) |
| 5460 | printf_filtered (" (thread %d)", b->thread); |
| 5461 | printf_filtered ("%s%s ", |
| 5462 | ((b->enable_state == bp_disabled |
| 5463 | || b->enable_state == bp_call_disabled |
| 5464 | || b->enable_state == bp_startup_disabled) |
| 5465 | ? " (disabled)" |
| 5466 | : b->enable_state == bp_permanent |
| 5467 | ? " (permanent)" |
| 5468 | : ""), |
| 5469 | (others > 1) ? "," |
| 5470 | : ((others == 1) ? " and" : "")); |
| 5471 | } |
| 5472 | printf_filtered (_("also set at pc ")); |
| 5473 | fputs_filtered (paddress (gdbarch, pc), gdb_stdout); |
| 5474 | printf_filtered (".\n"); |
| 5475 | } |
| 5476 | } |
| 5477 | \f |
| 5478 | /* Set the default place to put a breakpoint |
| 5479 | for the `break' command with no arguments. */ |
| 5480 | |
| 5481 | void |
| 5482 | set_default_breakpoint (int valid, struct program_space *pspace, |
| 5483 | CORE_ADDR addr, struct symtab *symtab, |
| 5484 | int line) |
| 5485 | { |
| 5486 | default_breakpoint_valid = valid; |
| 5487 | default_breakpoint_pspace = pspace; |
| 5488 | default_breakpoint_address = addr; |
| 5489 | default_breakpoint_symtab = symtab; |
| 5490 | default_breakpoint_line = line; |
| 5491 | } |
| 5492 | |
| 5493 | /* Return true iff it is meaningful to use the address member of |
| 5494 | BPT. For some breakpoint types, the address member is irrelevant |
| 5495 | and it makes no sense to attempt to compare it to other addresses |
| 5496 | (or use it for any other purpose either). |
| 5497 | |
| 5498 | More specifically, each of the following breakpoint types will |
| 5499 | always have a zero valued address and we don't want to mark |
| 5500 | breakpoints of any of these types to be a duplicate of an actual |
| 5501 | breakpoint at address zero: |
| 5502 | |
| 5503 | bp_watchpoint |
| 5504 | bp_catchpoint |
| 5505 | |
| 5506 | */ |
| 5507 | |
| 5508 | static int |
| 5509 | breakpoint_address_is_meaningful (struct breakpoint *bpt) |
| 5510 | { |
| 5511 | enum bptype type = bpt->type; |
| 5512 | |
| 5513 | return (type != bp_watchpoint && type != bp_catchpoint); |
| 5514 | } |
| 5515 | |
| 5516 | /* Assuming LOC1 and LOC2's owners are hardware watchpoints, returns |
| 5517 | true if LOC1 and LOC2 represent the same watchpoint location. */ |
| 5518 | |
| 5519 | static int |
| 5520 | watchpoint_locations_match (struct bp_location *loc1, |
| 5521 | struct bp_location *loc2) |
| 5522 | { |
| 5523 | /* Both of them must not be in moribund_locations. */ |
| 5524 | gdb_assert (loc1->owner != NULL); |
| 5525 | gdb_assert (loc2->owner != NULL); |
| 5526 | |
| 5527 | /* If the target can evaluate the condition expression in hardware, |
| 5528 | then we we need to insert both watchpoints even if they are at |
| 5529 | the same place. Otherwise the watchpoint will only trigger when |
| 5530 | the condition of whichever watchpoint was inserted evaluates to |
| 5531 | true, not giving a chance for GDB to check the condition of the |
| 5532 | other watchpoint. */ |
| 5533 | if ((loc1->owner->cond_exp |
| 5534 | && target_can_accel_watchpoint_condition (loc1->address, |
| 5535 | loc1->length, |
| 5536 | loc1->watchpoint_type, |
| 5537 | loc1->owner->cond_exp)) |
| 5538 | || (loc2->owner->cond_exp |
| 5539 | && target_can_accel_watchpoint_condition (loc2->address, |
| 5540 | loc2->length, |
| 5541 | loc2->watchpoint_type, |
| 5542 | loc2->owner->cond_exp))) |
| 5543 | return 0; |
| 5544 | |
| 5545 | /* Note that this checks the owner's type, not the location's. In |
| 5546 | case the target does not support read watchpoints, but does |
| 5547 | support access watchpoints, we'll have bp_read_watchpoint |
| 5548 | watchpoints with hw_access locations. Those should be considered |
| 5549 | duplicates of hw_read locations. The hw_read locations will |
| 5550 | become hw_access locations later. */ |
| 5551 | return (loc1->owner->type == loc2->owner->type |
| 5552 | && loc1->pspace->aspace == loc2->pspace->aspace |
| 5553 | && loc1->address == loc2->address |
| 5554 | && loc1->length == loc2->length); |
| 5555 | } |
| 5556 | |
| 5557 | /* Returns true if {ASPACE1,ADDR1} and {ASPACE2,ADDR2} represent the |
| 5558 | same breakpoint location. In most targets, this can only be true |
| 5559 | if ASPACE1 matches ASPACE2. On targets that have global |
| 5560 | breakpoints, the address space doesn't really matter. */ |
| 5561 | |
| 5562 | static int |
| 5563 | breakpoint_address_match (struct address_space *aspace1, CORE_ADDR addr1, |
| 5564 | struct address_space *aspace2, CORE_ADDR addr2) |
| 5565 | { |
| 5566 | return ((gdbarch_has_global_breakpoints (target_gdbarch) |
| 5567 | || aspace1 == aspace2) |
| 5568 | && addr1 == addr2); |
| 5569 | } |
| 5570 | |
| 5571 | /* Returns true if {ASPACE2,ADDR2} falls within the range determined by |
| 5572 | {ASPACE1,ADDR1,LEN1}. In most targets, this can only be true if ASPACE1 |
| 5573 | matches ASPACE2. On targets that have global breakpoints, the address |
| 5574 | space doesn't really matter. */ |
| 5575 | |
| 5576 | static int |
| 5577 | breakpoint_address_match_range (struct address_space *aspace1, CORE_ADDR addr1, |
| 5578 | int len1, struct address_space *aspace2, |
| 5579 | CORE_ADDR addr2) |
| 5580 | { |
| 5581 | return ((gdbarch_has_global_breakpoints (target_gdbarch) |
| 5582 | || aspace1 == aspace2) |
| 5583 | && addr2 >= addr1 && addr2 < addr1 + len1); |
| 5584 | } |
| 5585 | |
| 5586 | /* Returns true if {ASPACE,ADDR} matches the breakpoint BL. BL may be |
| 5587 | a ranged breakpoint. In most targets, a match happens only if ASPACE |
| 5588 | matches the breakpoint's address space. On targets that have global |
| 5589 | breakpoints, the address space doesn't really matter. */ |
| 5590 | |
| 5591 | static int |
| 5592 | breakpoint_location_address_match (struct bp_location *bl, |
| 5593 | struct address_space *aspace, |
| 5594 | CORE_ADDR addr) |
| 5595 | { |
| 5596 | return (breakpoint_address_match (bl->pspace->aspace, bl->address, |
| 5597 | aspace, addr) |
| 5598 | || (bl->length |
| 5599 | && breakpoint_address_match_range (bl->pspace->aspace, |
| 5600 | bl->address, bl->length, |
| 5601 | aspace, addr))); |
| 5602 | } |
| 5603 | |
| 5604 | /* Assuming LOC1 and LOC2's types' have meaningful target addresses |
| 5605 | (breakpoint_address_is_meaningful), returns true if LOC1 and LOC2 |
| 5606 | represent the same location. */ |
| 5607 | |
| 5608 | static int |
| 5609 | breakpoint_locations_match (struct bp_location *loc1, |
| 5610 | struct bp_location *loc2) |
| 5611 | { |
| 5612 | int hw_point1, hw_point2; |
| 5613 | |
| 5614 | /* Both of them must not be in moribund_locations. */ |
| 5615 | gdb_assert (loc1->owner != NULL); |
| 5616 | gdb_assert (loc2->owner != NULL); |
| 5617 | |
| 5618 | hw_point1 = is_hardware_watchpoint (loc1->owner); |
| 5619 | hw_point2 = is_hardware_watchpoint (loc2->owner); |
| 5620 | |
| 5621 | if (hw_point1 != hw_point2) |
| 5622 | return 0; |
| 5623 | else if (hw_point1) |
| 5624 | return watchpoint_locations_match (loc1, loc2); |
| 5625 | else |
| 5626 | /* We compare bp_location.length in order to cover ranged breakpoints. */ |
| 5627 | return (breakpoint_address_match (loc1->pspace->aspace, loc1->address, |
| 5628 | loc2->pspace->aspace, loc2->address) |
| 5629 | && loc1->length == loc2->length); |
| 5630 | } |
| 5631 | |
| 5632 | static void |
| 5633 | breakpoint_adjustment_warning (CORE_ADDR from_addr, CORE_ADDR to_addr, |
| 5634 | int bnum, int have_bnum) |
| 5635 | { |
| 5636 | /* The longest string possibly returned by hex_string_custom |
| 5637 | is 50 chars. These must be at least that big for safety. */ |
| 5638 | char astr1[64]; |
| 5639 | char astr2[64]; |
| 5640 | |
| 5641 | strcpy (astr1, hex_string_custom ((unsigned long) from_addr, 8)); |
| 5642 | strcpy (astr2, hex_string_custom ((unsigned long) to_addr, 8)); |
| 5643 | if (have_bnum) |
| 5644 | warning (_("Breakpoint %d address previously adjusted from %s to %s."), |
| 5645 | bnum, astr1, astr2); |
| 5646 | else |
| 5647 | warning (_("Breakpoint address adjusted from %s to %s."), astr1, astr2); |
| 5648 | } |
| 5649 | |
| 5650 | /* Adjust a breakpoint's address to account for architectural |
| 5651 | constraints on breakpoint placement. Return the adjusted address. |
| 5652 | Note: Very few targets require this kind of adjustment. For most |
| 5653 | targets, this function is simply the identity function. */ |
| 5654 | |
| 5655 | static CORE_ADDR |
| 5656 | adjust_breakpoint_address (struct gdbarch *gdbarch, |
| 5657 | CORE_ADDR bpaddr, enum bptype bptype) |
| 5658 | { |
| 5659 | if (!gdbarch_adjust_breakpoint_address_p (gdbarch)) |
| 5660 | { |
| 5661 | /* Very few targets need any kind of breakpoint adjustment. */ |
| 5662 | return bpaddr; |
| 5663 | } |
| 5664 | else if (bptype == bp_watchpoint |
| 5665 | || bptype == bp_hardware_watchpoint |
| 5666 | || bptype == bp_read_watchpoint |
| 5667 | || bptype == bp_access_watchpoint |
| 5668 | || bptype == bp_catchpoint) |
| 5669 | { |
| 5670 | /* Watchpoints and the various bp_catch_* eventpoints should not |
| 5671 | have their addresses modified. */ |
| 5672 | return bpaddr; |
| 5673 | } |
| 5674 | else |
| 5675 | { |
| 5676 | CORE_ADDR adjusted_bpaddr; |
| 5677 | |
| 5678 | /* Some targets have architectural constraints on the placement |
| 5679 | of breakpoint instructions. Obtain the adjusted address. */ |
| 5680 | adjusted_bpaddr = gdbarch_adjust_breakpoint_address (gdbarch, bpaddr); |
| 5681 | |
| 5682 | /* An adjusted breakpoint address can significantly alter |
| 5683 | a user's expectations. Print a warning if an adjustment |
| 5684 | is required. */ |
| 5685 | if (adjusted_bpaddr != bpaddr) |
| 5686 | breakpoint_adjustment_warning (bpaddr, adjusted_bpaddr, 0, 0); |
| 5687 | |
| 5688 | return adjusted_bpaddr; |
| 5689 | } |
| 5690 | } |
| 5691 | |
| 5692 | /* Allocate a struct bp_location. */ |
| 5693 | |
| 5694 | static struct bp_location * |
| 5695 | allocate_bp_location (struct breakpoint *bpt) |
| 5696 | { |
| 5697 | struct bp_location *loc; |
| 5698 | |
| 5699 | loc = xmalloc (sizeof (struct bp_location)); |
| 5700 | memset (loc, 0, sizeof (*loc)); |
| 5701 | |
| 5702 | loc->owner = bpt; |
| 5703 | loc->cond = NULL; |
| 5704 | loc->shlib_disabled = 0; |
| 5705 | loc->enabled = 1; |
| 5706 | |
| 5707 | switch (bpt->type) |
| 5708 | { |
| 5709 | case bp_breakpoint: |
| 5710 | case bp_until: |
| 5711 | case bp_finish: |
| 5712 | case bp_longjmp: |
| 5713 | case bp_longjmp_resume: |
| 5714 | case bp_exception: |
| 5715 | case bp_exception_resume: |
| 5716 | case bp_step_resume: |
| 5717 | case bp_hp_step_resume: |
| 5718 | case bp_watchpoint_scope: |
| 5719 | case bp_call_dummy: |
| 5720 | case bp_std_terminate: |
| 5721 | case bp_shlib_event: |
| 5722 | case bp_thread_event: |
| 5723 | case bp_overlay_event: |
| 5724 | case bp_jit_event: |
| 5725 | case bp_longjmp_master: |
| 5726 | case bp_std_terminate_master: |
| 5727 | case bp_exception_master: |
| 5728 | case bp_gnu_ifunc_resolver: |
| 5729 | case bp_gnu_ifunc_resolver_return: |
| 5730 | loc->loc_type = bp_loc_software_breakpoint; |
| 5731 | break; |
| 5732 | case bp_hardware_breakpoint: |
| 5733 | loc->loc_type = bp_loc_hardware_breakpoint; |
| 5734 | break; |
| 5735 | case bp_hardware_watchpoint: |
| 5736 | case bp_read_watchpoint: |
| 5737 | case bp_access_watchpoint: |
| 5738 | loc->loc_type = bp_loc_hardware_watchpoint; |
| 5739 | break; |
| 5740 | case bp_watchpoint: |
| 5741 | case bp_catchpoint: |
| 5742 | case bp_tracepoint: |
| 5743 | case bp_fast_tracepoint: |
| 5744 | case bp_static_tracepoint: |
| 5745 | loc->loc_type = bp_loc_other; |
| 5746 | break; |
| 5747 | default: |
| 5748 | internal_error (__FILE__, __LINE__, _("unknown breakpoint type")); |
| 5749 | } |
| 5750 | |
| 5751 | loc->refc = 1; |
| 5752 | return loc; |
| 5753 | } |
| 5754 | |
| 5755 | static void |
| 5756 | free_bp_location (struct bp_location *loc) |
| 5757 | { |
| 5758 | if (loc->cond) |
| 5759 | xfree (loc->cond); |
| 5760 | |
| 5761 | if (loc->function_name) |
| 5762 | xfree (loc->function_name); |
| 5763 | |
| 5764 | xfree (loc); |
| 5765 | } |
| 5766 | |
| 5767 | /* Increment reference count. */ |
| 5768 | |
| 5769 | static void |
| 5770 | incref_bp_location (struct bp_location *bl) |
| 5771 | { |
| 5772 | ++bl->refc; |
| 5773 | } |
| 5774 | |
| 5775 | /* Decrement reference count. If the reference count reaches 0, |
| 5776 | destroy the bp_location. Sets *BLP to NULL. */ |
| 5777 | |
| 5778 | static void |
| 5779 | decref_bp_location (struct bp_location **blp) |
| 5780 | { |
| 5781 | gdb_assert ((*blp)->refc > 0); |
| 5782 | |
| 5783 | if (--(*blp)->refc == 0) |
| 5784 | free_bp_location (*blp); |
| 5785 | *blp = NULL; |
| 5786 | } |
| 5787 | |
| 5788 | /* Add breakpoint B at the end of the global breakpoint chain. */ |
| 5789 | |
| 5790 | static void |
| 5791 | add_to_breakpoint_chain (struct breakpoint *b) |
| 5792 | { |
| 5793 | struct breakpoint *b1; |
| 5794 | |
| 5795 | /* Add this breakpoint to the end of the chain so that a list of |
| 5796 | breakpoints will come out in order of increasing numbers. */ |
| 5797 | |
| 5798 | b1 = breakpoint_chain; |
| 5799 | if (b1 == 0) |
| 5800 | breakpoint_chain = b; |
| 5801 | else |
| 5802 | { |
| 5803 | while (b1->next) |
| 5804 | b1 = b1->next; |
| 5805 | b1->next = b; |
| 5806 | } |
| 5807 | } |
| 5808 | |
| 5809 | /* Initializes breakpoint B with type BPTYPE and no locations yet. */ |
| 5810 | |
| 5811 | static void |
| 5812 | init_raw_breakpoint_without_location (struct breakpoint *b, |
| 5813 | struct gdbarch *gdbarch, |
| 5814 | enum bptype bptype) |
| 5815 | { |
| 5816 | memset (b, 0, sizeof (*b)); |
| 5817 | |
| 5818 | b->type = bptype; |
| 5819 | b->gdbarch = gdbarch; |
| 5820 | b->language = current_language->la_language; |
| 5821 | b->input_radix = input_radix; |
| 5822 | b->thread = -1; |
| 5823 | b->enable_state = bp_enabled; |
| 5824 | b->next = 0; |
| 5825 | b->silent = 0; |
| 5826 | b->ignore_count = 0; |
| 5827 | b->commands = NULL; |
| 5828 | b->frame_id = null_frame_id; |
| 5829 | b->exec_pathname = NULL; |
| 5830 | b->ops = NULL; |
| 5831 | b->condition_not_parsed = 0; |
| 5832 | b->py_bp_object = NULL; |
| 5833 | b->related_breakpoint = b; |
| 5834 | |
| 5835 | add_to_breakpoint_chain (b); |
| 5836 | } |
| 5837 | |
| 5838 | /* Helper to set_raw_breakpoint below. Creates a breakpoint |
| 5839 | that has type BPTYPE and has no locations as yet. */ |
| 5840 | /* This function is used in gdbtk sources and thus can not be made |
| 5841 | static. */ |
| 5842 | |
| 5843 | static struct breakpoint * |
| 5844 | set_raw_breakpoint_without_location (struct gdbarch *gdbarch, |
| 5845 | enum bptype bptype) |
| 5846 | { |
| 5847 | struct breakpoint *b = XNEW (struct breakpoint); |
| 5848 | |
| 5849 | init_raw_breakpoint_without_location (b, gdbarch, bptype); |
| 5850 | |
| 5851 | return b; |
| 5852 | } |
| 5853 | |
| 5854 | /* Initialize loc->function_name. EXPLICIT_LOC says no indirect function |
| 5855 | resolutions should be made as the user specified the location explicitly |
| 5856 | enough. */ |
| 5857 | |
| 5858 | static void |
| 5859 | set_breakpoint_location_function (struct bp_location *loc, int explicit_loc) |
| 5860 | { |
| 5861 | gdb_assert (loc->owner != NULL); |
| 5862 | |
| 5863 | if (loc->owner->type == bp_breakpoint |
| 5864 | || loc->owner->type == bp_hardware_breakpoint |
| 5865 | || is_tracepoint (loc->owner)) |
| 5866 | { |
| 5867 | int is_gnu_ifunc; |
| 5868 | |
| 5869 | find_pc_partial_function_gnu_ifunc (loc->address, &loc->function_name, |
| 5870 | NULL, NULL, &is_gnu_ifunc); |
| 5871 | |
| 5872 | if (is_gnu_ifunc && !explicit_loc) |
| 5873 | { |
| 5874 | struct breakpoint *b = loc->owner; |
| 5875 | |
| 5876 | gdb_assert (loc->pspace == current_program_space); |
| 5877 | if (gnu_ifunc_resolve_name (loc->function_name, |
| 5878 | &loc->requested_address)) |
| 5879 | { |
| 5880 | /* Recalculate ADDRESS based on new REQUESTED_ADDRESS. */ |
| 5881 | loc->address = adjust_breakpoint_address (loc->gdbarch, |
| 5882 | loc->requested_address, |
| 5883 | b->type); |
| 5884 | } |
| 5885 | else if (b->type == bp_breakpoint && b->loc == loc |
| 5886 | && loc->next == NULL && b->related_breakpoint == b) |
| 5887 | { |
| 5888 | /* Create only the whole new breakpoint of this type but do not |
| 5889 | mess more complicated breakpoints with multiple locations. */ |
| 5890 | b->type = bp_gnu_ifunc_resolver; |
| 5891 | } |
| 5892 | } |
| 5893 | |
| 5894 | if (loc->function_name) |
| 5895 | loc->function_name = xstrdup (loc->function_name); |
| 5896 | } |
| 5897 | } |
| 5898 | |
| 5899 | /* Attempt to determine architecture of location identified by SAL. */ |
| 5900 | static struct gdbarch * |
| 5901 | get_sal_arch (struct symtab_and_line sal) |
| 5902 | { |
| 5903 | if (sal.section) |
| 5904 | return get_objfile_arch (sal.section->objfile); |
| 5905 | if (sal.symtab) |
| 5906 | return get_objfile_arch (sal.symtab->objfile); |
| 5907 | |
| 5908 | return NULL; |
| 5909 | } |
| 5910 | |
| 5911 | /* Low level routine for partially initializing a breakpoint of type |
| 5912 | BPTYPE. The newly created breakpoint's address, section, source |
| 5913 | file name, and line number are provided by SAL. The newly created |
| 5914 | and partially initialized breakpoint is added to the breakpoint |
| 5915 | chain. |
| 5916 | |
| 5917 | It is expected that the caller will complete the initialization of |
| 5918 | the newly created breakpoint struct as well as output any status |
| 5919 | information regarding the creation of a new breakpoint. In |
| 5920 | particular, init_raw_breakpoint does NOT set the breakpoint number! |
| 5921 | Care should be taken to not allow an error to occur prior to |
| 5922 | completing the initialization of the breakpoint. If this should |
| 5923 | happen, a bogus breakpoint will be left on the chain. */ |
| 5924 | |
| 5925 | static void |
| 5926 | init_raw_breakpoint (struct breakpoint *b, struct gdbarch *gdbarch, |
| 5927 | struct symtab_and_line sal, enum bptype bptype) |
| 5928 | { |
| 5929 | CORE_ADDR adjusted_address; |
| 5930 | struct gdbarch *loc_gdbarch; |
| 5931 | |
| 5932 | init_raw_breakpoint_without_location (b, gdbarch, bptype); |
| 5933 | |
| 5934 | loc_gdbarch = get_sal_arch (sal); |
| 5935 | if (!loc_gdbarch) |
| 5936 | loc_gdbarch = b->gdbarch; |
| 5937 | |
| 5938 | if (bptype != bp_catchpoint) |
| 5939 | gdb_assert (sal.pspace != NULL); |
| 5940 | |
| 5941 | /* Adjust the breakpoint's address prior to allocating a location. |
| 5942 | Once we call allocate_bp_location(), that mostly uninitialized |
| 5943 | location will be placed on the location chain. Adjustment of the |
| 5944 | breakpoint may cause target_read_memory() to be called and we do |
| 5945 | not want its scan of the location chain to find a breakpoint and |
| 5946 | location that's only been partially initialized. */ |
| 5947 | adjusted_address = adjust_breakpoint_address (loc_gdbarch, |
| 5948 | sal.pc, b->type); |
| 5949 | |
| 5950 | b->loc = allocate_bp_location (b); |
| 5951 | b->loc->gdbarch = loc_gdbarch; |
| 5952 | b->loc->requested_address = sal.pc; |
| 5953 | b->loc->address = adjusted_address; |
| 5954 | b->loc->pspace = sal.pspace; |
| 5955 | |
| 5956 | /* Store the program space that was used to set the breakpoint, for |
| 5957 | breakpoint resetting. */ |
| 5958 | b->pspace = sal.pspace; |
| 5959 | |
| 5960 | if (sal.symtab == NULL) |
| 5961 | b->source_file = NULL; |
| 5962 | else |
| 5963 | b->source_file = xstrdup (sal.symtab->filename); |
| 5964 | b->loc->section = sal.section; |
| 5965 | b->line_number = sal.line; |
| 5966 | |
| 5967 | set_breakpoint_location_function (b->loc, |
| 5968 | sal.explicit_pc || sal.explicit_line); |
| 5969 | |
| 5970 | breakpoints_changed (); |
| 5971 | } |
| 5972 | |
| 5973 | /* set_raw_breakpoint is a low level routine for allocating and |
| 5974 | partially initializing a breakpoint of type BPTYPE. The newly |
| 5975 | created breakpoint's address, section, source file name, and line |
| 5976 | number are provided by SAL. The newly created and partially |
| 5977 | initialized breakpoint is added to the breakpoint chain and |
| 5978 | is also returned as the value of this function. |
| 5979 | |
| 5980 | It is expected that the caller will complete the initialization of |
| 5981 | the newly created breakpoint struct as well as output any status |
| 5982 | information regarding the creation of a new breakpoint. In |
| 5983 | particular, set_raw_breakpoint does NOT set the breakpoint |
| 5984 | number! Care should be taken to not allow an error to occur |
| 5985 | prior to completing the initialization of the breakpoint. If this |
| 5986 | should happen, a bogus breakpoint will be left on the chain. */ |
| 5987 | |
| 5988 | struct breakpoint * |
| 5989 | set_raw_breakpoint (struct gdbarch *gdbarch, |
| 5990 | struct symtab_and_line sal, enum bptype bptype) |
| 5991 | { |
| 5992 | struct breakpoint *b = XNEW (struct breakpoint); |
| 5993 | |
| 5994 | init_raw_breakpoint (b, gdbarch, sal, bptype); |
| 5995 | return b; |
| 5996 | } |
| 5997 | |
| 5998 | |
| 5999 | /* Note that the breakpoint object B describes a permanent breakpoint |
| 6000 | instruction, hard-wired into the inferior's code. */ |
| 6001 | void |
| 6002 | make_breakpoint_permanent (struct breakpoint *b) |
| 6003 | { |
| 6004 | struct bp_location *bl; |
| 6005 | |
| 6006 | b->enable_state = bp_permanent; |
| 6007 | |
| 6008 | /* By definition, permanent breakpoints are already present in the |
| 6009 | code. Mark all locations as inserted. For now, |
| 6010 | make_breakpoint_permanent is called in just one place, so it's |
| 6011 | hard to say if it's reasonable to have permanent breakpoint with |
| 6012 | multiple locations or not, but it's easy to implmement. */ |
| 6013 | for (bl = b->loc; bl; bl = bl->next) |
| 6014 | bl->inserted = 1; |
| 6015 | } |
| 6016 | |
| 6017 | /* Call this routine when stepping and nexting to enable a breakpoint |
| 6018 | if we do a longjmp() or 'throw' in TP. FRAME is the frame which |
| 6019 | initiated the operation. */ |
| 6020 | |
| 6021 | void |
| 6022 | set_longjmp_breakpoint (struct thread_info *tp, struct frame_id frame) |
| 6023 | { |
| 6024 | struct breakpoint *b, *b_tmp; |
| 6025 | int thread = tp->num; |
| 6026 | |
| 6027 | /* To avoid having to rescan all objfile symbols at every step, |
| 6028 | we maintain a list of continually-inserted but always disabled |
| 6029 | longjmp "master" breakpoints. Here, we simply create momentary |
| 6030 | clones of those and enable them for the requested thread. */ |
| 6031 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6032 | if (b->pspace == current_program_space |
| 6033 | && (b->type == bp_longjmp_master |
| 6034 | || b->type == bp_exception_master)) |
| 6035 | { |
| 6036 | struct breakpoint *clone = clone_momentary_breakpoint (b); |
| 6037 | |
| 6038 | clone->type = b->type == bp_longjmp_master ? bp_longjmp : bp_exception; |
| 6039 | clone->thread = thread; |
| 6040 | } |
| 6041 | |
| 6042 | tp->initiating_frame = frame; |
| 6043 | } |
| 6044 | |
| 6045 | /* Delete all longjmp breakpoints from THREAD. */ |
| 6046 | void |
| 6047 | delete_longjmp_breakpoint (int thread) |
| 6048 | { |
| 6049 | struct breakpoint *b, *b_tmp; |
| 6050 | |
| 6051 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6052 | if (b->type == bp_longjmp || b->type == bp_exception) |
| 6053 | { |
| 6054 | if (b->thread == thread) |
| 6055 | delete_breakpoint (b); |
| 6056 | } |
| 6057 | } |
| 6058 | |
| 6059 | void |
| 6060 | enable_overlay_breakpoints (void) |
| 6061 | { |
| 6062 | struct breakpoint *b; |
| 6063 | |
| 6064 | ALL_BREAKPOINTS (b) |
| 6065 | if (b->type == bp_overlay_event) |
| 6066 | { |
| 6067 | b->enable_state = bp_enabled; |
| 6068 | update_global_location_list (1); |
| 6069 | overlay_events_enabled = 1; |
| 6070 | } |
| 6071 | } |
| 6072 | |
| 6073 | void |
| 6074 | disable_overlay_breakpoints (void) |
| 6075 | { |
| 6076 | struct breakpoint *b; |
| 6077 | |
| 6078 | ALL_BREAKPOINTS (b) |
| 6079 | if (b->type == bp_overlay_event) |
| 6080 | { |
| 6081 | b->enable_state = bp_disabled; |
| 6082 | update_global_location_list (0); |
| 6083 | overlay_events_enabled = 0; |
| 6084 | } |
| 6085 | } |
| 6086 | |
| 6087 | /* Set an active std::terminate breakpoint for each std::terminate |
| 6088 | master breakpoint. */ |
| 6089 | void |
| 6090 | set_std_terminate_breakpoint (void) |
| 6091 | { |
| 6092 | struct breakpoint *b, *b_tmp; |
| 6093 | |
| 6094 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6095 | if (b->pspace == current_program_space |
| 6096 | && b->type == bp_std_terminate_master) |
| 6097 | { |
| 6098 | struct breakpoint *clone = clone_momentary_breakpoint (b); |
| 6099 | clone->type = bp_std_terminate; |
| 6100 | } |
| 6101 | } |
| 6102 | |
| 6103 | /* Delete all the std::terminate breakpoints. */ |
| 6104 | void |
| 6105 | delete_std_terminate_breakpoint (void) |
| 6106 | { |
| 6107 | struct breakpoint *b, *b_tmp; |
| 6108 | |
| 6109 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6110 | if (b->type == bp_std_terminate) |
| 6111 | delete_breakpoint (b); |
| 6112 | } |
| 6113 | |
| 6114 | struct breakpoint * |
| 6115 | create_thread_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address) |
| 6116 | { |
| 6117 | struct breakpoint *b; |
| 6118 | |
| 6119 | b = create_internal_breakpoint (gdbarch, address, bp_thread_event); |
| 6120 | |
| 6121 | b->enable_state = bp_enabled; |
| 6122 | /* addr_string has to be used or breakpoint_re_set will delete me. */ |
| 6123 | b->addr_string |
| 6124 | = xstrprintf ("*%s", paddress (b->loc->gdbarch, b->loc->address)); |
| 6125 | |
| 6126 | update_global_location_list_nothrow (1); |
| 6127 | |
| 6128 | return b; |
| 6129 | } |
| 6130 | |
| 6131 | void |
| 6132 | remove_thread_event_breakpoints (void) |
| 6133 | { |
| 6134 | struct breakpoint *b, *b_tmp; |
| 6135 | |
| 6136 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6137 | if (b->type == bp_thread_event |
| 6138 | && b->loc->pspace == current_program_space) |
| 6139 | delete_breakpoint (b); |
| 6140 | } |
| 6141 | |
| 6142 | struct lang_and_radix |
| 6143 | { |
| 6144 | enum language lang; |
| 6145 | int radix; |
| 6146 | }; |
| 6147 | |
| 6148 | /* Create a breakpoint for JIT code registration and unregistration. */ |
| 6149 | |
| 6150 | struct breakpoint * |
| 6151 | create_jit_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address) |
| 6152 | { |
| 6153 | struct breakpoint *b; |
| 6154 | |
| 6155 | b = create_internal_breakpoint (gdbarch, address, bp_jit_event); |
| 6156 | update_global_location_list_nothrow (1); |
| 6157 | return b; |
| 6158 | } |
| 6159 | |
| 6160 | /* Remove JIT code registration and unregistration breakpoint(s). */ |
| 6161 | |
| 6162 | void |
| 6163 | remove_jit_event_breakpoints (void) |
| 6164 | { |
| 6165 | struct breakpoint *b, *b_tmp; |
| 6166 | |
| 6167 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6168 | if (b->type == bp_jit_event |
| 6169 | && b->loc->pspace == current_program_space) |
| 6170 | delete_breakpoint (b); |
| 6171 | } |
| 6172 | |
| 6173 | void |
| 6174 | remove_solib_event_breakpoints (void) |
| 6175 | { |
| 6176 | struct breakpoint *b, *b_tmp; |
| 6177 | |
| 6178 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 6179 | if (b->type == bp_shlib_event |
| 6180 | && b->loc->pspace == current_program_space) |
| 6181 | delete_breakpoint (b); |
| 6182 | } |
| 6183 | |
| 6184 | struct breakpoint * |
| 6185 | create_solib_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address) |
| 6186 | { |
| 6187 | struct breakpoint *b; |
| 6188 | |
| 6189 | b = create_internal_breakpoint (gdbarch, address, bp_shlib_event); |
| 6190 | update_global_location_list_nothrow (1); |
| 6191 | return b; |
| 6192 | } |
| 6193 | |
| 6194 | /* Disable any breakpoints that are on code in shared libraries. Only |
| 6195 | apply to enabled breakpoints, disabled ones can just stay disabled. */ |
| 6196 | |
| 6197 | void |
| 6198 | disable_breakpoints_in_shlibs (void) |
| 6199 | { |
| 6200 | struct bp_location *loc, **locp_tmp; |
| 6201 | |
| 6202 | ALL_BP_LOCATIONS (loc, locp_tmp) |
| 6203 | { |
| 6204 | /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */ |
| 6205 | struct breakpoint *b = loc->owner; |
| 6206 | |
| 6207 | /* We apply the check to all breakpoints, including disabled for |
| 6208 | those with loc->duplicate set. This is so that when breakpoint |
| 6209 | becomes enabled, or the duplicate is removed, gdb will try to |
| 6210 | insert all breakpoints. If we don't set shlib_disabled here, |
| 6211 | we'll try to insert those breakpoints and fail. */ |
| 6212 | if (((b->type == bp_breakpoint) |
| 6213 | || (b->type == bp_jit_event) |
| 6214 | || (b->type == bp_hardware_breakpoint) |
| 6215 | || (is_tracepoint (b))) |
| 6216 | && loc->pspace == current_program_space |
| 6217 | && !loc->shlib_disabled |
| 6218 | #ifdef PC_SOLIB |
| 6219 | && PC_SOLIB (loc->address) |
| 6220 | #else |
| 6221 | && solib_name_from_address (loc->pspace, loc->address) |
| 6222 | #endif |
| 6223 | ) |
| 6224 | { |
| 6225 | loc->shlib_disabled = 1; |
| 6226 | } |
| 6227 | } |
| 6228 | } |
| 6229 | |
| 6230 | /* Disable any breakpoints that are in an unloaded shared library. |
| 6231 | Only apply to enabled breakpoints, disabled ones can just stay |
| 6232 | disabled. */ |
| 6233 | |
| 6234 | static void |
| 6235 | disable_breakpoints_in_unloaded_shlib (struct so_list *solib) |
| 6236 | { |
| 6237 | struct bp_location *loc, **locp_tmp; |
| 6238 | int disabled_shlib_breaks = 0; |
| 6239 | |
| 6240 | /* SunOS a.out shared libraries are always mapped, so do not |
| 6241 | disable breakpoints; they will only be reported as unloaded |
| 6242 | through clear_solib when GDB discards its shared library |
| 6243 | list. See clear_solib for more information. */ |
| 6244 | if (exec_bfd != NULL |
| 6245 | && bfd_get_flavour (exec_bfd) == bfd_target_aout_flavour) |
| 6246 | return; |
| 6247 | |
| 6248 | ALL_BP_LOCATIONS (loc, locp_tmp) |
| 6249 | { |
| 6250 | /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */ |
| 6251 | struct breakpoint *b = loc->owner; |
| 6252 | |
| 6253 | if ((loc->loc_type == bp_loc_hardware_breakpoint |
| 6254 | || loc->loc_type == bp_loc_software_breakpoint) |
| 6255 | && solib->pspace == loc->pspace |
| 6256 | && !loc->shlib_disabled |
| 6257 | && (b->type == bp_breakpoint |
| 6258 | || b->type == bp_jit_event |
| 6259 | || b->type == bp_hardware_breakpoint) |
| 6260 | && solib_contains_address_p (solib, loc->address)) |
| 6261 | { |
| 6262 | loc->shlib_disabled = 1; |
| 6263 | /* At this point, we cannot rely on remove_breakpoint |
| 6264 | succeeding so we must mark the breakpoint as not inserted |
| 6265 | to prevent future errors occurring in remove_breakpoints. */ |
| 6266 | loc->inserted = 0; |
| 6267 | |
| 6268 | /* This may cause duplicate notifications for the same breakpoint. */ |
| 6269 | observer_notify_breakpoint_modified (b); |
| 6270 | |
| 6271 | if (!disabled_shlib_breaks) |
| 6272 | { |
| 6273 | target_terminal_ours_for_output (); |
| 6274 | warning (_("Temporarily disabling breakpoints " |
| 6275 | "for unloaded shared library \"%s\""), |
| 6276 | solib->so_name); |
| 6277 | } |
| 6278 | disabled_shlib_breaks = 1; |
| 6279 | } |
| 6280 | } |
| 6281 | } |
| 6282 | |
| 6283 | /* FORK & VFORK catchpoints. */ |
| 6284 | |
| 6285 | /* An instance of this type is used to represent a fork or vfork |
| 6286 | catchpoint. It includes a "struct breakpoint" as a kind of base |
| 6287 | class; users downcast to "struct breakpoint *" when needed. A |
| 6288 | breakpoint is really of this type iff its ops pointer points to |
| 6289 | CATCH_FORK_BREAKPOINT_OPS. */ |
| 6290 | |
| 6291 | struct fork_catchpoint |
| 6292 | { |
| 6293 | /* The base class. */ |
| 6294 | struct breakpoint base; |
| 6295 | |
| 6296 | /* Process id of a child process whose forking triggered this |
| 6297 | catchpoint. This field is only valid immediately after this |
| 6298 | catchpoint has triggered. */ |
| 6299 | ptid_t forked_inferior_pid; |
| 6300 | }; |
| 6301 | |
| 6302 | /* Implement the "insert" breakpoint_ops method for fork |
| 6303 | catchpoints. */ |
| 6304 | |
| 6305 | static int |
| 6306 | insert_catch_fork (struct bp_location *bl) |
| 6307 | { |
| 6308 | return target_insert_fork_catchpoint (PIDGET (inferior_ptid)); |
| 6309 | } |
| 6310 | |
| 6311 | /* Implement the "remove" breakpoint_ops method for fork |
| 6312 | catchpoints. */ |
| 6313 | |
| 6314 | static int |
| 6315 | remove_catch_fork (struct bp_location *bl) |
| 6316 | { |
| 6317 | return target_remove_fork_catchpoint (PIDGET (inferior_ptid)); |
| 6318 | } |
| 6319 | |
| 6320 | /* Implement the "breakpoint_hit" breakpoint_ops method for fork |
| 6321 | catchpoints. */ |
| 6322 | |
| 6323 | static int |
| 6324 | breakpoint_hit_catch_fork (const struct bp_location *bl, |
| 6325 | struct address_space *aspace, CORE_ADDR bp_addr) |
| 6326 | { |
| 6327 | struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner; |
| 6328 | |
| 6329 | return inferior_has_forked (inferior_ptid, &c->forked_inferior_pid); |
| 6330 | } |
| 6331 | |
| 6332 | /* Implement the "print_it" breakpoint_ops method for fork |
| 6333 | catchpoints. */ |
| 6334 | |
| 6335 | static enum print_stop_action |
| 6336 | print_it_catch_fork (struct breakpoint *b) |
| 6337 | { |
| 6338 | struct fork_catchpoint *c = (struct fork_catchpoint *) b; |
| 6339 | |
| 6340 | annotate_catchpoint (b->number); |
| 6341 | printf_filtered (_("\nCatchpoint %d (forked process %d), "), |
| 6342 | b->number, ptid_get_pid (c->forked_inferior_pid)); |
| 6343 | return PRINT_SRC_AND_LOC; |
| 6344 | } |
| 6345 | |
| 6346 | /* Implement the "print_one" breakpoint_ops method for fork |
| 6347 | catchpoints. */ |
| 6348 | |
| 6349 | static void |
| 6350 | print_one_catch_fork (struct breakpoint *b, struct bp_location **last_loc) |
| 6351 | { |
| 6352 | struct fork_catchpoint *c = (struct fork_catchpoint *) b; |
| 6353 | struct value_print_options opts; |
| 6354 | |
| 6355 | get_user_print_options (&opts); |
| 6356 | |
| 6357 | /* Field 4, the address, is omitted (which makes the columns not |
| 6358 | line up too nicely with the headers, but the effect is relatively |
| 6359 | readable). */ |
| 6360 | if (opts.addressprint) |
| 6361 | ui_out_field_skip (uiout, "addr"); |
| 6362 | annotate_field (5); |
| 6363 | ui_out_text (uiout, "fork"); |
| 6364 | if (!ptid_equal (c->forked_inferior_pid, null_ptid)) |
| 6365 | { |
| 6366 | ui_out_text (uiout, ", process "); |
| 6367 | ui_out_field_int (uiout, "what", |
| 6368 | ptid_get_pid (c->forked_inferior_pid)); |
| 6369 | ui_out_spaces (uiout, 1); |
| 6370 | } |
| 6371 | } |
| 6372 | |
| 6373 | /* Implement the "print_mention" breakpoint_ops method for fork |
| 6374 | catchpoints. */ |
| 6375 | |
| 6376 | static void |
| 6377 | print_mention_catch_fork (struct breakpoint *b) |
| 6378 | { |
| 6379 | printf_filtered (_("Catchpoint %d (fork)"), b->number); |
| 6380 | } |
| 6381 | |
| 6382 | /* Implement the "print_recreate" breakpoint_ops method for fork |
| 6383 | catchpoints. */ |
| 6384 | |
| 6385 | static void |
| 6386 | print_recreate_catch_fork (struct breakpoint *b, struct ui_file *fp) |
| 6387 | { |
| 6388 | fprintf_unfiltered (fp, "catch fork"); |
| 6389 | } |
| 6390 | |
| 6391 | /* The breakpoint_ops structure to be used in fork catchpoints. */ |
| 6392 | |
| 6393 | static struct breakpoint_ops catch_fork_breakpoint_ops = |
| 6394 | { |
| 6395 | NULL, /* dtor */ |
| 6396 | insert_catch_fork, |
| 6397 | remove_catch_fork, |
| 6398 | breakpoint_hit_catch_fork, |
| 6399 | NULL, /* resources_needed */ |
| 6400 | NULL, /* works_in_software_mode */ |
| 6401 | print_it_catch_fork, |
| 6402 | print_one_catch_fork, |
| 6403 | NULL, /* print_one_detail */ |
| 6404 | print_mention_catch_fork, |
| 6405 | print_recreate_catch_fork |
| 6406 | }; |
| 6407 | |
| 6408 | /* Implement the "insert" breakpoint_ops method for vfork |
| 6409 | catchpoints. */ |
| 6410 | |
| 6411 | static int |
| 6412 | insert_catch_vfork (struct bp_location *bl) |
| 6413 | { |
| 6414 | return target_insert_vfork_catchpoint (PIDGET (inferior_ptid)); |
| 6415 | } |
| 6416 | |
| 6417 | /* Implement the "remove" breakpoint_ops method for vfork |
| 6418 | catchpoints. */ |
| 6419 | |
| 6420 | static int |
| 6421 | remove_catch_vfork (struct bp_location *bl) |
| 6422 | { |
| 6423 | return target_remove_vfork_catchpoint (PIDGET (inferior_ptid)); |
| 6424 | } |
| 6425 | |
| 6426 | /* Implement the "breakpoint_hit" breakpoint_ops method for vfork |
| 6427 | catchpoints. */ |
| 6428 | |
| 6429 | static int |
| 6430 | breakpoint_hit_catch_vfork (const struct bp_location *bl, |
| 6431 | struct address_space *aspace, CORE_ADDR bp_addr) |
| 6432 | { |
| 6433 | struct fork_catchpoint *c = (struct fork_catchpoint *) bl->owner; |
| 6434 | |
| 6435 | return inferior_has_vforked (inferior_ptid, &c->forked_inferior_pid); |
| 6436 | } |
| 6437 | |
| 6438 | /* Implement the "print_it" breakpoint_ops method for vfork |
| 6439 | catchpoints. */ |
| 6440 | |
| 6441 | static enum print_stop_action |
| 6442 | print_it_catch_vfork (struct breakpoint *b) |
| 6443 | { |
| 6444 | struct fork_catchpoint *c = (struct fork_catchpoint *) b; |
| 6445 | |
| 6446 | annotate_catchpoint (b->number); |
| 6447 | printf_filtered (_("\nCatchpoint %d (vforked process %d), "), |
| 6448 | b->number, ptid_get_pid (c->forked_inferior_pid)); |
| 6449 | return PRINT_SRC_AND_LOC; |
| 6450 | } |
| 6451 | |
| 6452 | /* Implement the "print_one" breakpoint_ops method for vfork |
| 6453 | catchpoints. */ |
| 6454 | |
| 6455 | static void |
| 6456 | print_one_catch_vfork (struct breakpoint *b, struct bp_location **last_loc) |
| 6457 | { |
| 6458 | struct fork_catchpoint *c = (struct fork_catchpoint *) b; |
| 6459 | struct value_print_options opts; |
| 6460 | |
| 6461 | get_user_print_options (&opts); |
| 6462 | /* Field 4, the address, is omitted (which makes the columns not |
| 6463 | line up too nicely with the headers, but the effect is relatively |
| 6464 | readable). */ |
| 6465 | if (opts.addressprint) |
| 6466 | ui_out_field_skip (uiout, "addr"); |
| 6467 | annotate_field (5); |
| 6468 | ui_out_text (uiout, "vfork"); |
| 6469 | if (!ptid_equal (c->forked_inferior_pid, null_ptid)) |
| 6470 | { |
| 6471 | ui_out_text (uiout, ", process "); |
| 6472 | ui_out_field_int (uiout, "what", |
| 6473 | ptid_get_pid (c->forked_inferior_pid)); |
| 6474 | ui_out_spaces (uiout, 1); |
| 6475 | } |
| 6476 | } |
| 6477 | |
| 6478 | /* Implement the "print_mention" breakpoint_ops method for vfork |
| 6479 | catchpoints. */ |
| 6480 | |
| 6481 | static void |
| 6482 | print_mention_catch_vfork (struct breakpoint *b) |
| 6483 | { |
| 6484 | printf_filtered (_("Catchpoint %d (vfork)"), b->number); |
| 6485 | } |
| 6486 | |
| 6487 | /* Implement the "print_recreate" breakpoint_ops method for vfork |
| 6488 | catchpoints. */ |
| 6489 | |
| 6490 | static void |
| 6491 | print_recreate_catch_vfork (struct breakpoint *b, struct ui_file *fp) |
| 6492 | { |
| 6493 | fprintf_unfiltered (fp, "catch vfork"); |
| 6494 | } |
| 6495 | |
| 6496 | /* The breakpoint_ops structure to be used in vfork catchpoints. */ |
| 6497 | |
| 6498 | static struct breakpoint_ops catch_vfork_breakpoint_ops = |
| 6499 | { |
| 6500 | NULL, /* dtor */ |
| 6501 | insert_catch_vfork, |
| 6502 | remove_catch_vfork, |
| 6503 | breakpoint_hit_catch_vfork, |
| 6504 | NULL, /* resources_needed */ |
| 6505 | NULL, /* works_in_software_mode */ |
| 6506 | print_it_catch_vfork, |
| 6507 | print_one_catch_vfork, |
| 6508 | NULL, /* print_one_detail */ |
| 6509 | print_mention_catch_vfork, |
| 6510 | print_recreate_catch_vfork |
| 6511 | }; |
| 6512 | |
| 6513 | /* An instance of this type is used to represent a syscall catchpoint. |
| 6514 | It includes a "struct breakpoint" as a kind of base class; users |
| 6515 | downcast to "struct breakpoint *" when needed. A breakpoint is |
| 6516 | really of this type iff its ops pointer points to |
| 6517 | CATCH_SYSCALL_BREAKPOINT_OPS. */ |
| 6518 | |
| 6519 | struct syscall_catchpoint |
| 6520 | { |
| 6521 | /* The base class. */ |
| 6522 | struct breakpoint base; |
| 6523 | |
| 6524 | /* Syscall numbers used for the 'catch syscall' feature. If no |
| 6525 | syscall has been specified for filtering, its value is NULL. |
| 6526 | Otherwise, it holds a list of all syscalls to be caught. The |
| 6527 | list elements are allocated with xmalloc. */ |
| 6528 | VEC(int) *syscalls_to_be_caught; |
| 6529 | }; |
| 6530 | |
| 6531 | /* Implement the "dtor" breakpoint_ops method for syscall |
| 6532 | catchpoints. */ |
| 6533 | |
| 6534 | static void |
| 6535 | dtor_catch_syscall (struct breakpoint *b) |
| 6536 | { |
| 6537 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 6538 | |
| 6539 | VEC_free (int, c->syscalls_to_be_caught); |
| 6540 | } |
| 6541 | |
| 6542 | /* Implement the "insert" breakpoint_ops method for syscall |
| 6543 | catchpoints. */ |
| 6544 | |
| 6545 | static int |
| 6546 | insert_catch_syscall (struct bp_location *bl) |
| 6547 | { |
| 6548 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; |
| 6549 | struct inferior *inf = current_inferior (); |
| 6550 | |
| 6551 | ++inf->total_syscalls_count; |
| 6552 | if (!c->syscalls_to_be_caught) |
| 6553 | ++inf->any_syscall_count; |
| 6554 | else |
| 6555 | { |
| 6556 | int i, iter; |
| 6557 | |
| 6558 | for (i = 0; |
| 6559 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 6560 | i++) |
| 6561 | { |
| 6562 | int elem; |
| 6563 | |
| 6564 | if (iter >= VEC_length (int, inf->syscalls_counts)) |
| 6565 | { |
| 6566 | int old_size = VEC_length (int, inf->syscalls_counts); |
| 6567 | uintptr_t vec_addr_offset |
| 6568 | = old_size * ((uintptr_t) sizeof (int)); |
| 6569 | uintptr_t vec_addr; |
| 6570 | VEC_safe_grow (int, inf->syscalls_counts, iter + 1); |
| 6571 | vec_addr = (uintptr_t) VEC_address (int, inf->syscalls_counts) + |
| 6572 | vec_addr_offset; |
| 6573 | memset ((void *) vec_addr, 0, |
| 6574 | (iter + 1 - old_size) * sizeof (int)); |
| 6575 | } |
| 6576 | elem = VEC_index (int, inf->syscalls_counts, iter); |
| 6577 | VEC_replace (int, inf->syscalls_counts, iter, ++elem); |
| 6578 | } |
| 6579 | } |
| 6580 | |
| 6581 | return target_set_syscall_catchpoint (PIDGET (inferior_ptid), |
| 6582 | inf->total_syscalls_count != 0, |
| 6583 | inf->any_syscall_count, |
| 6584 | VEC_length (int, inf->syscalls_counts), |
| 6585 | VEC_address (int, inf->syscalls_counts)); |
| 6586 | } |
| 6587 | |
| 6588 | /* Implement the "remove" breakpoint_ops method for syscall |
| 6589 | catchpoints. */ |
| 6590 | |
| 6591 | static int |
| 6592 | remove_catch_syscall (struct bp_location *bl) |
| 6593 | { |
| 6594 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; |
| 6595 | struct inferior *inf = current_inferior (); |
| 6596 | |
| 6597 | --inf->total_syscalls_count; |
| 6598 | if (!c->syscalls_to_be_caught) |
| 6599 | --inf->any_syscall_count; |
| 6600 | else |
| 6601 | { |
| 6602 | int i, iter; |
| 6603 | |
| 6604 | for (i = 0; |
| 6605 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 6606 | i++) |
| 6607 | { |
| 6608 | int elem; |
| 6609 | if (iter >= VEC_length (int, inf->syscalls_counts)) |
| 6610 | /* Shouldn't happen. */ |
| 6611 | continue; |
| 6612 | elem = VEC_index (int, inf->syscalls_counts, iter); |
| 6613 | VEC_replace (int, inf->syscalls_counts, iter, --elem); |
| 6614 | } |
| 6615 | } |
| 6616 | |
| 6617 | return target_set_syscall_catchpoint (PIDGET (inferior_ptid), |
| 6618 | inf->total_syscalls_count != 0, |
| 6619 | inf->any_syscall_count, |
| 6620 | VEC_length (int, inf->syscalls_counts), |
| 6621 | VEC_address (int, |
| 6622 | inf->syscalls_counts)); |
| 6623 | } |
| 6624 | |
| 6625 | /* Implement the "breakpoint_hit" breakpoint_ops method for syscall |
| 6626 | catchpoints. */ |
| 6627 | |
| 6628 | static int |
| 6629 | breakpoint_hit_catch_syscall (const struct bp_location *bl, |
| 6630 | struct address_space *aspace, CORE_ADDR bp_addr) |
| 6631 | { |
| 6632 | /* We must check if we are catching specific syscalls in this |
| 6633 | breakpoint. If we are, then we must guarantee that the called |
| 6634 | syscall is the same syscall we are catching. */ |
| 6635 | int syscall_number = 0; |
| 6636 | const struct syscall_catchpoint *c |
| 6637 | = (const struct syscall_catchpoint *) bl->owner; |
| 6638 | |
| 6639 | if (!inferior_has_called_syscall (inferior_ptid, &syscall_number)) |
| 6640 | return 0; |
| 6641 | |
| 6642 | /* Now, checking if the syscall is the same. */ |
| 6643 | if (c->syscalls_to_be_caught) |
| 6644 | { |
| 6645 | int i, iter; |
| 6646 | |
| 6647 | for (i = 0; |
| 6648 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 6649 | i++) |
| 6650 | if (syscall_number == iter) |
| 6651 | break; |
| 6652 | /* Not the same. */ |
| 6653 | if (!iter) |
| 6654 | return 0; |
| 6655 | } |
| 6656 | |
| 6657 | return 1; |
| 6658 | } |
| 6659 | |
| 6660 | /* Implement the "print_it" breakpoint_ops method for syscall |
| 6661 | catchpoints. */ |
| 6662 | |
| 6663 | static enum print_stop_action |
| 6664 | print_it_catch_syscall (struct breakpoint *b) |
| 6665 | { |
| 6666 | /* These are needed because we want to know in which state a |
| 6667 | syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY |
| 6668 | or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we |
| 6669 | must print "called syscall" or "returned from syscall". */ |
| 6670 | ptid_t ptid; |
| 6671 | struct target_waitstatus last; |
| 6672 | struct syscall s; |
| 6673 | struct cleanup *old_chain; |
| 6674 | char *syscall_id; |
| 6675 | |
| 6676 | get_last_target_status (&ptid, &last); |
| 6677 | |
| 6678 | get_syscall_by_number (last.value.syscall_number, &s); |
| 6679 | |
| 6680 | annotate_catchpoint (b->number); |
| 6681 | |
| 6682 | if (s.name == NULL) |
| 6683 | syscall_id = xstrprintf ("%d", last.value.syscall_number); |
| 6684 | else |
| 6685 | syscall_id = xstrprintf ("'%s'", s.name); |
| 6686 | |
| 6687 | old_chain = make_cleanup (xfree, syscall_id); |
| 6688 | |
| 6689 | if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY) |
| 6690 | printf_filtered (_("\nCatchpoint %d (call to syscall %s), "), |
| 6691 | b->number, syscall_id); |
| 6692 | else if (last.kind == TARGET_WAITKIND_SYSCALL_RETURN) |
| 6693 | printf_filtered (_("\nCatchpoint %d (returned from syscall %s), "), |
| 6694 | b->number, syscall_id); |
| 6695 | |
| 6696 | do_cleanups (old_chain); |
| 6697 | |
| 6698 | return PRINT_SRC_AND_LOC; |
| 6699 | } |
| 6700 | |
| 6701 | /* Implement the "print_one" breakpoint_ops method for syscall |
| 6702 | catchpoints. */ |
| 6703 | |
| 6704 | static void |
| 6705 | print_one_catch_syscall (struct breakpoint *b, |
| 6706 | struct bp_location **last_loc) |
| 6707 | { |
| 6708 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 6709 | struct value_print_options opts; |
| 6710 | |
| 6711 | get_user_print_options (&opts); |
| 6712 | /* Field 4, the address, is omitted (which makes the columns not |
| 6713 | line up too nicely with the headers, but the effect is relatively |
| 6714 | readable). */ |
| 6715 | if (opts.addressprint) |
| 6716 | ui_out_field_skip (uiout, "addr"); |
| 6717 | annotate_field (5); |
| 6718 | |
| 6719 | if (c->syscalls_to_be_caught |
| 6720 | && VEC_length (int, c->syscalls_to_be_caught) > 1) |
| 6721 | ui_out_text (uiout, "syscalls \""); |
| 6722 | else |
| 6723 | ui_out_text (uiout, "syscall \""); |
| 6724 | |
| 6725 | if (c->syscalls_to_be_caught) |
| 6726 | { |
| 6727 | int i, iter; |
| 6728 | char *text = xstrprintf ("%s", ""); |
| 6729 | |
| 6730 | for (i = 0; |
| 6731 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 6732 | i++) |
| 6733 | { |
| 6734 | char *x = text; |
| 6735 | struct syscall s; |
| 6736 | get_syscall_by_number (iter, &s); |
| 6737 | |
| 6738 | if (s.name != NULL) |
| 6739 | text = xstrprintf ("%s%s, ", text, s.name); |
| 6740 | else |
| 6741 | text = xstrprintf ("%s%d, ", text, iter); |
| 6742 | |
| 6743 | /* We have to xfree the last 'text' (now stored at 'x') |
| 6744 | because xstrprintf dinamically allocates new space for it |
| 6745 | on every call. */ |
| 6746 | xfree (x); |
| 6747 | } |
| 6748 | /* Remove the last comma. */ |
| 6749 | text[strlen (text) - 2] = '\0'; |
| 6750 | ui_out_field_string (uiout, "what", text); |
| 6751 | } |
| 6752 | else |
| 6753 | ui_out_field_string (uiout, "what", "<any syscall>"); |
| 6754 | ui_out_text (uiout, "\" "); |
| 6755 | } |
| 6756 | |
| 6757 | /* Implement the "print_mention" breakpoint_ops method for syscall |
| 6758 | catchpoints. */ |
| 6759 | |
| 6760 | static void |
| 6761 | print_mention_catch_syscall (struct breakpoint *b) |
| 6762 | { |
| 6763 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 6764 | |
| 6765 | if (c->syscalls_to_be_caught) |
| 6766 | { |
| 6767 | int i, iter; |
| 6768 | |
| 6769 | if (VEC_length (int, c->syscalls_to_be_caught) > 1) |
| 6770 | printf_filtered (_("Catchpoint %d (syscalls"), b->number); |
| 6771 | else |
| 6772 | printf_filtered (_("Catchpoint %d (syscall"), b->number); |
| 6773 | |
| 6774 | for (i = 0; |
| 6775 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 6776 | i++) |
| 6777 | { |
| 6778 | struct syscall s; |
| 6779 | get_syscall_by_number (iter, &s); |
| 6780 | |
| 6781 | if (s.name) |
| 6782 | printf_filtered (" '%s' [%d]", s.name, s.number); |
| 6783 | else |
| 6784 | printf_filtered (" %d", s.number); |
| 6785 | } |
| 6786 | printf_filtered (")"); |
| 6787 | } |
| 6788 | else |
| 6789 | printf_filtered (_("Catchpoint %d (any syscall)"), |
| 6790 | b->number); |
| 6791 | } |
| 6792 | |
| 6793 | /* Implement the "print_recreate" breakpoint_ops method for syscall |
| 6794 | catchpoints. */ |
| 6795 | |
| 6796 | static void |
| 6797 | print_recreate_catch_syscall (struct breakpoint *b, struct ui_file *fp) |
| 6798 | { |
| 6799 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 6800 | |
| 6801 | fprintf_unfiltered (fp, "catch syscall"); |
| 6802 | |
| 6803 | if (c->syscalls_to_be_caught) |
| 6804 | { |
| 6805 | int i, iter; |
| 6806 | |
| 6807 | for (i = 0; |
| 6808 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 6809 | i++) |
| 6810 | { |
| 6811 | struct syscall s; |
| 6812 | |
| 6813 | get_syscall_by_number (iter, &s); |
| 6814 | if (s.name) |
| 6815 | fprintf_unfiltered (fp, " %s", s.name); |
| 6816 | else |
| 6817 | fprintf_unfiltered (fp, " %d", s.number); |
| 6818 | } |
| 6819 | } |
| 6820 | } |
| 6821 | |
| 6822 | /* The breakpoint_ops structure to be used in syscall catchpoints. */ |
| 6823 | |
| 6824 | static struct breakpoint_ops catch_syscall_breakpoint_ops = |
| 6825 | { |
| 6826 | dtor_catch_syscall, |
| 6827 | insert_catch_syscall, |
| 6828 | remove_catch_syscall, |
| 6829 | breakpoint_hit_catch_syscall, |
| 6830 | NULL, /* resources_needed */ |
| 6831 | NULL, /* works_in_software_mode */ |
| 6832 | print_it_catch_syscall, |
| 6833 | print_one_catch_syscall, |
| 6834 | NULL, /* print_one_detail */ |
| 6835 | print_mention_catch_syscall, |
| 6836 | print_recreate_catch_syscall |
| 6837 | }; |
| 6838 | |
| 6839 | /* Returns non-zero if 'b' is a syscall catchpoint. */ |
| 6840 | |
| 6841 | static int |
| 6842 | syscall_catchpoint_p (struct breakpoint *b) |
| 6843 | { |
| 6844 | return (b->ops == &catch_syscall_breakpoint_ops); |
| 6845 | } |
| 6846 | |
| 6847 | /* Initialize a new breakpoint of the bp_catchpoint kind. If TEMPFLAG |
| 6848 | is non-zero, then make the breakpoint temporary. If COND_STRING is |
| 6849 | not NULL, then store it in the breakpoint. OPS, if not NULL, is |
| 6850 | the breakpoint_ops structure associated to the catchpoint. */ |
| 6851 | |
| 6852 | static void |
| 6853 | init_catchpoint (struct breakpoint *b, |
| 6854 | struct gdbarch *gdbarch, int tempflag, |
| 6855 | char *cond_string, |
| 6856 | struct breakpoint_ops *ops) |
| 6857 | { |
| 6858 | struct symtab_and_line sal; |
| 6859 | |
| 6860 | memset (b, 0, sizeof (*b)); |
| 6861 | |
| 6862 | init_sal (&sal); |
| 6863 | sal.pspace = current_program_space; |
| 6864 | |
| 6865 | init_raw_breakpoint (b, gdbarch, sal, bp_catchpoint); |
| 6866 | set_breakpoint_count (breakpoint_count + 1); |
| 6867 | b->number = breakpoint_count; |
| 6868 | |
| 6869 | b->cond_string = (cond_string == NULL) ? NULL : xstrdup (cond_string); |
| 6870 | b->thread = -1; |
| 6871 | b->addr_string = NULL; |
| 6872 | b->enable_state = bp_enabled; |
| 6873 | b->disposition = tempflag ? disp_del : disp_donttouch; |
| 6874 | b->ops = ops; |
| 6875 | } |
| 6876 | |
| 6877 | /* Create a new breakpoint of the bp_catchpoint kind and return it, |
| 6878 | but does NOT mention it nor update the global location list. |
| 6879 | This is useful if you need to fill more fields in the |
| 6880 | struct breakpoint before calling mention. |
| 6881 | |
| 6882 | If TEMPFLAG is non-zero, then make the breakpoint temporary. |
| 6883 | If COND_STRING is not NULL, then store it in the breakpoint. |
| 6884 | OPS, if not NULL, is the breakpoint_ops structure associated |
| 6885 | to the catchpoint. */ |
| 6886 | |
| 6887 | static struct breakpoint * |
| 6888 | create_catchpoint_without_mention (struct gdbarch *gdbarch, int tempflag, |
| 6889 | char *cond_string, |
| 6890 | struct breakpoint_ops *ops) |
| 6891 | { |
| 6892 | struct breakpoint *b = XNEW (struct breakpoint); |
| 6893 | |
| 6894 | init_catchpoint (b, gdbarch, tempflag, cond_string, ops); |
| 6895 | return b; |
| 6896 | } |
| 6897 | |
| 6898 | /* Create a new breakpoint of the bp_catchpoint kind and return it. |
| 6899 | |
| 6900 | If TEMPFLAG is non-zero, then make the breakpoint temporary. |
| 6901 | If COND_STRING is not NULL, then store it in the breakpoint. |
| 6902 | OPS, if not NULL, is the breakpoint_ops structure associated |
| 6903 | to the catchpoint. */ |
| 6904 | |
| 6905 | static struct breakpoint * |
| 6906 | create_catchpoint (struct gdbarch *gdbarch, int tempflag, |
| 6907 | char *cond_string, struct breakpoint_ops *ops) |
| 6908 | { |
| 6909 | struct breakpoint *b = |
| 6910 | create_catchpoint_without_mention (gdbarch, tempflag, cond_string, ops); |
| 6911 | |
| 6912 | mention (b); |
| 6913 | observer_notify_breakpoint_created (b); |
| 6914 | update_global_location_list (1); |
| 6915 | |
| 6916 | return b; |
| 6917 | } |
| 6918 | |
| 6919 | static void |
| 6920 | create_fork_vfork_event_catchpoint (struct gdbarch *gdbarch, |
| 6921 | int tempflag, char *cond_string, |
| 6922 | struct breakpoint_ops *ops) |
| 6923 | { |
| 6924 | struct fork_catchpoint *c = XNEW (struct fork_catchpoint); |
| 6925 | |
| 6926 | init_catchpoint (&c->base, gdbarch, tempflag, cond_string, ops); |
| 6927 | |
| 6928 | c->forked_inferior_pid = null_ptid; |
| 6929 | |
| 6930 | mention (&c->base); |
| 6931 | observer_notify_breakpoint_created (&c->base); |
| 6932 | update_global_location_list (1); |
| 6933 | } |
| 6934 | |
| 6935 | /* Exec catchpoints. */ |
| 6936 | |
| 6937 | static int |
| 6938 | insert_catch_exec (struct bp_location *bl) |
| 6939 | { |
| 6940 | return target_insert_exec_catchpoint (PIDGET (inferior_ptid)); |
| 6941 | } |
| 6942 | |
| 6943 | static int |
| 6944 | remove_catch_exec (struct bp_location *bl) |
| 6945 | { |
| 6946 | return target_remove_exec_catchpoint (PIDGET (inferior_ptid)); |
| 6947 | } |
| 6948 | |
| 6949 | static int |
| 6950 | breakpoint_hit_catch_exec (const struct bp_location *bl, |
| 6951 | struct address_space *aspace, CORE_ADDR bp_addr) |
| 6952 | { |
| 6953 | return inferior_has_execd (inferior_ptid, &bl->owner->exec_pathname); |
| 6954 | } |
| 6955 | |
| 6956 | static enum print_stop_action |
| 6957 | print_it_catch_exec (struct breakpoint *b) |
| 6958 | { |
| 6959 | annotate_catchpoint (b->number); |
| 6960 | printf_filtered (_("\nCatchpoint %d (exec'd %s), "), b->number, |
| 6961 | b->exec_pathname); |
| 6962 | return PRINT_SRC_AND_LOC; |
| 6963 | } |
| 6964 | |
| 6965 | static void |
| 6966 | print_one_catch_exec (struct breakpoint *b, struct bp_location **last_loc) |
| 6967 | { |
| 6968 | struct value_print_options opts; |
| 6969 | |
| 6970 | get_user_print_options (&opts); |
| 6971 | |
| 6972 | /* Field 4, the address, is omitted (which makes the columns |
| 6973 | not line up too nicely with the headers, but the effect |
| 6974 | is relatively readable). */ |
| 6975 | if (opts.addressprint) |
| 6976 | ui_out_field_skip (uiout, "addr"); |
| 6977 | annotate_field (5); |
| 6978 | ui_out_text (uiout, "exec"); |
| 6979 | if (b->exec_pathname != NULL) |
| 6980 | { |
| 6981 | ui_out_text (uiout, ", program \""); |
| 6982 | ui_out_field_string (uiout, "what", b->exec_pathname); |
| 6983 | ui_out_text (uiout, "\" "); |
| 6984 | } |
| 6985 | } |
| 6986 | |
| 6987 | static void |
| 6988 | print_mention_catch_exec (struct breakpoint *b) |
| 6989 | { |
| 6990 | printf_filtered (_("Catchpoint %d (exec)"), b->number); |
| 6991 | } |
| 6992 | |
| 6993 | /* Implement the "print_recreate" breakpoint_ops method for exec |
| 6994 | catchpoints. */ |
| 6995 | |
| 6996 | static void |
| 6997 | print_recreate_catch_exec (struct breakpoint *b, struct ui_file *fp) |
| 6998 | { |
| 6999 | fprintf_unfiltered (fp, "catch exec"); |
| 7000 | } |
| 7001 | |
| 7002 | static struct breakpoint_ops catch_exec_breakpoint_ops = |
| 7003 | { |
| 7004 | NULL, /* dtor */ |
| 7005 | insert_catch_exec, |
| 7006 | remove_catch_exec, |
| 7007 | breakpoint_hit_catch_exec, |
| 7008 | NULL, /* resources_needed */ |
| 7009 | NULL, /* works_in_software_mode */ |
| 7010 | print_it_catch_exec, |
| 7011 | print_one_catch_exec, |
| 7012 | NULL, /* print_one_detail */ |
| 7013 | print_mention_catch_exec, |
| 7014 | print_recreate_catch_exec |
| 7015 | }; |
| 7016 | |
| 7017 | static void |
| 7018 | create_syscall_event_catchpoint (int tempflag, VEC(int) *filter, |
| 7019 | struct breakpoint_ops *ops) |
| 7020 | { |
| 7021 | struct syscall_catchpoint *c; |
| 7022 | struct gdbarch *gdbarch = get_current_arch (); |
| 7023 | |
| 7024 | c = XNEW (struct syscall_catchpoint); |
| 7025 | init_catchpoint (&c->base, gdbarch, tempflag, NULL, ops); |
| 7026 | c->syscalls_to_be_caught = filter; |
| 7027 | |
| 7028 | /* Now, we have to mention the breakpoint and update the global |
| 7029 | location list. */ |
| 7030 | mention (&c->base); |
| 7031 | observer_notify_breakpoint_created (&c->base); |
| 7032 | update_global_location_list (1); |
| 7033 | } |
| 7034 | |
| 7035 | static int |
| 7036 | hw_breakpoint_used_count (void) |
| 7037 | { |
| 7038 | int i = 0; |
| 7039 | struct breakpoint *b; |
| 7040 | struct bp_location *bl; |
| 7041 | |
| 7042 | ALL_BREAKPOINTS (b) |
| 7043 | { |
| 7044 | if (b->type == bp_hardware_breakpoint && breakpoint_enabled (b)) |
| 7045 | for (bl = b->loc; bl; bl = bl->next) |
| 7046 | { |
| 7047 | /* Special types of hardware breakpoints may use more than |
| 7048 | one register. */ |
| 7049 | if (b->ops && b->ops->resources_needed) |
| 7050 | i += b->ops->resources_needed (bl); |
| 7051 | else |
| 7052 | i++; |
| 7053 | } |
| 7054 | } |
| 7055 | |
| 7056 | return i; |
| 7057 | } |
| 7058 | |
| 7059 | static int |
| 7060 | hw_watchpoint_used_count (enum bptype type, int *other_type_used) |
| 7061 | { |
| 7062 | int i = 0; |
| 7063 | struct breakpoint *b; |
| 7064 | struct bp_location *bl; |
| 7065 | |
| 7066 | *other_type_used = 0; |
| 7067 | ALL_BREAKPOINTS (b) |
| 7068 | { |
| 7069 | if (!breakpoint_enabled (b)) |
| 7070 | continue; |
| 7071 | |
| 7072 | if (b->type == type) |
| 7073 | for (bl = b->loc; bl; bl = bl->next) |
| 7074 | { |
| 7075 | /* Special types of hardware watchpoints may use more than |
| 7076 | one register. */ |
| 7077 | if (b->ops && b->ops->resources_needed) |
| 7078 | i += b->ops->resources_needed (bl); |
| 7079 | else |
| 7080 | i++; |
| 7081 | } |
| 7082 | else if (is_hardware_watchpoint (b)) |
| 7083 | *other_type_used = 1; |
| 7084 | } |
| 7085 | |
| 7086 | return i; |
| 7087 | } |
| 7088 | |
| 7089 | void |
| 7090 | disable_watchpoints_before_interactive_call_start (void) |
| 7091 | { |
| 7092 | struct breakpoint *b; |
| 7093 | |
| 7094 | ALL_BREAKPOINTS (b) |
| 7095 | { |
| 7096 | if (is_watchpoint (b) && breakpoint_enabled (b)) |
| 7097 | { |
| 7098 | b->enable_state = bp_call_disabled; |
| 7099 | update_global_location_list (0); |
| 7100 | } |
| 7101 | } |
| 7102 | } |
| 7103 | |
| 7104 | void |
| 7105 | enable_watchpoints_after_interactive_call_stop (void) |
| 7106 | { |
| 7107 | struct breakpoint *b; |
| 7108 | |
| 7109 | ALL_BREAKPOINTS (b) |
| 7110 | { |
| 7111 | if (is_watchpoint (b) && b->enable_state == bp_call_disabled) |
| 7112 | { |
| 7113 | b->enable_state = bp_enabled; |
| 7114 | update_global_location_list (1); |
| 7115 | } |
| 7116 | } |
| 7117 | } |
| 7118 | |
| 7119 | void |
| 7120 | disable_breakpoints_before_startup (void) |
| 7121 | { |
| 7122 | struct breakpoint *b; |
| 7123 | int found = 0; |
| 7124 | |
| 7125 | ALL_BREAKPOINTS (b) |
| 7126 | { |
| 7127 | if (b->pspace != current_program_space) |
| 7128 | continue; |
| 7129 | |
| 7130 | if ((b->type == bp_breakpoint |
| 7131 | || b->type == bp_hardware_breakpoint) |
| 7132 | && breakpoint_enabled (b)) |
| 7133 | { |
| 7134 | b->enable_state = bp_startup_disabled; |
| 7135 | found = 1; |
| 7136 | } |
| 7137 | } |
| 7138 | |
| 7139 | if (found) |
| 7140 | update_global_location_list (0); |
| 7141 | |
| 7142 | current_program_space->executing_startup = 1; |
| 7143 | } |
| 7144 | |
| 7145 | void |
| 7146 | enable_breakpoints_after_startup (void) |
| 7147 | { |
| 7148 | struct breakpoint *b; |
| 7149 | int found = 0; |
| 7150 | |
| 7151 | current_program_space->executing_startup = 0; |
| 7152 | |
| 7153 | ALL_BREAKPOINTS (b) |
| 7154 | { |
| 7155 | if (b->pspace != current_program_space) |
| 7156 | continue; |
| 7157 | |
| 7158 | if ((b->type == bp_breakpoint |
| 7159 | || b->type == bp_hardware_breakpoint) |
| 7160 | && b->enable_state == bp_startup_disabled) |
| 7161 | { |
| 7162 | b->enable_state = bp_enabled; |
| 7163 | found = 1; |
| 7164 | } |
| 7165 | } |
| 7166 | |
| 7167 | if (found) |
| 7168 | breakpoint_re_set (); |
| 7169 | } |
| 7170 | |
| 7171 | |
| 7172 | /* Set a breakpoint that will evaporate an end of command |
| 7173 | at address specified by SAL. |
| 7174 | Restrict it to frame FRAME if FRAME is nonzero. */ |
| 7175 | |
| 7176 | struct breakpoint * |
| 7177 | set_momentary_breakpoint (struct gdbarch *gdbarch, struct symtab_and_line sal, |
| 7178 | struct frame_id frame_id, enum bptype type) |
| 7179 | { |
| 7180 | struct breakpoint *b; |
| 7181 | |
| 7182 | /* If FRAME_ID is valid, it should be a real frame, not an inlined |
| 7183 | one. */ |
| 7184 | gdb_assert (!frame_id_inlined_p (frame_id)); |
| 7185 | |
| 7186 | b = set_raw_breakpoint (gdbarch, sal, type); |
| 7187 | b->enable_state = bp_enabled; |
| 7188 | b->disposition = disp_donttouch; |
| 7189 | b->frame_id = frame_id; |
| 7190 | |
| 7191 | /* If we're debugging a multi-threaded program, then we want |
| 7192 | momentary breakpoints to be active in only a single thread of |
| 7193 | control. */ |
| 7194 | if (in_thread_list (inferior_ptid)) |
| 7195 | b->thread = pid_to_thread_id (inferior_ptid); |
| 7196 | |
| 7197 | update_global_location_list_nothrow (1); |
| 7198 | |
| 7199 | return b; |
| 7200 | } |
| 7201 | |
| 7202 | /* Make a deep copy of momentary breakpoint ORIG. Returns NULL if |
| 7203 | ORIG is NULL. */ |
| 7204 | |
| 7205 | struct breakpoint * |
| 7206 | clone_momentary_breakpoint (struct breakpoint *orig) |
| 7207 | { |
| 7208 | struct breakpoint *copy; |
| 7209 | |
| 7210 | /* If there's nothing to clone, then return nothing. */ |
| 7211 | if (orig == NULL) |
| 7212 | return NULL; |
| 7213 | |
| 7214 | copy = set_raw_breakpoint_without_location (orig->gdbarch, orig->type); |
| 7215 | copy->loc = allocate_bp_location (copy); |
| 7216 | set_breakpoint_location_function (copy->loc, 1); |
| 7217 | |
| 7218 | copy->loc->gdbarch = orig->loc->gdbarch; |
| 7219 | copy->loc->requested_address = orig->loc->requested_address; |
| 7220 | copy->loc->address = orig->loc->address; |
| 7221 | copy->loc->section = orig->loc->section; |
| 7222 | copy->loc->pspace = orig->loc->pspace; |
| 7223 | |
| 7224 | if (orig->source_file == NULL) |
| 7225 | copy->source_file = NULL; |
| 7226 | else |
| 7227 | copy->source_file = xstrdup (orig->source_file); |
| 7228 | |
| 7229 | copy->line_number = orig->line_number; |
| 7230 | copy->frame_id = orig->frame_id; |
| 7231 | copy->thread = orig->thread; |
| 7232 | copy->pspace = orig->pspace; |
| 7233 | |
| 7234 | copy->enable_state = bp_enabled; |
| 7235 | copy->disposition = disp_donttouch; |
| 7236 | copy->number = internal_breakpoint_number--; |
| 7237 | |
| 7238 | update_global_location_list_nothrow (0); |
| 7239 | return copy; |
| 7240 | } |
| 7241 | |
| 7242 | struct breakpoint * |
| 7243 | set_momentary_breakpoint_at_pc (struct gdbarch *gdbarch, CORE_ADDR pc, |
| 7244 | enum bptype type) |
| 7245 | { |
| 7246 | struct symtab_and_line sal; |
| 7247 | |
| 7248 | sal = find_pc_line (pc, 0); |
| 7249 | sal.pc = pc; |
| 7250 | sal.section = find_pc_overlay (pc); |
| 7251 | sal.explicit_pc = 1; |
| 7252 | |
| 7253 | return set_momentary_breakpoint (gdbarch, sal, null_frame_id, type); |
| 7254 | } |
| 7255 | \f |
| 7256 | |
| 7257 | /* Tell the user we have just set a breakpoint B. */ |
| 7258 | |
| 7259 | static void |
| 7260 | mention (struct breakpoint *b) |
| 7261 | { |
| 7262 | int say_where = 0; |
| 7263 | struct cleanup *ui_out_chain; |
| 7264 | struct value_print_options opts; |
| 7265 | |
| 7266 | get_user_print_options (&opts); |
| 7267 | |
| 7268 | if (b->ops != NULL && b->ops->print_mention != NULL) |
| 7269 | b->ops->print_mention (b); |
| 7270 | else |
| 7271 | switch (b->type) |
| 7272 | { |
| 7273 | case bp_none: |
| 7274 | printf_filtered (_("(apparently deleted?) Eventpoint %d: "), |
| 7275 | b->number); |
| 7276 | break; |
| 7277 | case bp_watchpoint: |
| 7278 | ui_out_text (uiout, "Watchpoint "); |
| 7279 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| 7280 | ui_out_field_int (uiout, "number", b->number); |
| 7281 | ui_out_text (uiout, ": "); |
| 7282 | ui_out_field_string (uiout, "exp", b->exp_string); |
| 7283 | do_cleanups (ui_out_chain); |
| 7284 | break; |
| 7285 | case bp_hardware_watchpoint: |
| 7286 | ui_out_text (uiout, "Hardware watchpoint "); |
| 7287 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| 7288 | ui_out_field_int (uiout, "number", b->number); |
| 7289 | ui_out_text (uiout, ": "); |
| 7290 | ui_out_field_string (uiout, "exp", b->exp_string); |
| 7291 | do_cleanups (ui_out_chain); |
| 7292 | break; |
| 7293 | case bp_read_watchpoint: |
| 7294 | ui_out_text (uiout, "Hardware read watchpoint "); |
| 7295 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt"); |
| 7296 | ui_out_field_int (uiout, "number", b->number); |
| 7297 | ui_out_text (uiout, ": "); |
| 7298 | ui_out_field_string (uiout, "exp", b->exp_string); |
| 7299 | do_cleanups (ui_out_chain); |
| 7300 | break; |
| 7301 | case bp_access_watchpoint: |
| 7302 | ui_out_text (uiout, "Hardware access (read/write) watchpoint "); |
| 7303 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt"); |
| 7304 | ui_out_field_int (uiout, "number", b->number); |
| 7305 | ui_out_text (uiout, ": "); |
| 7306 | ui_out_field_string (uiout, "exp", b->exp_string); |
| 7307 | do_cleanups (ui_out_chain); |
| 7308 | break; |
| 7309 | case bp_breakpoint: |
| 7310 | case bp_gnu_ifunc_resolver: |
| 7311 | if (ui_out_is_mi_like_p (uiout)) |
| 7312 | { |
| 7313 | say_where = 0; |
| 7314 | break; |
| 7315 | } |
| 7316 | if (b->disposition == disp_del) |
| 7317 | printf_filtered (_("Temporary breakpoint")); |
| 7318 | else |
| 7319 | printf_filtered (_("Breakpoint")); |
| 7320 | printf_filtered (_(" %d"), b->number); |
| 7321 | if (b->type == bp_gnu_ifunc_resolver) |
| 7322 | printf_filtered (_(" at gnu-indirect-function resolver")); |
| 7323 | say_where = 1; |
| 7324 | break; |
| 7325 | case bp_hardware_breakpoint: |
| 7326 | if (ui_out_is_mi_like_p (uiout)) |
| 7327 | { |
| 7328 | say_where = 0; |
| 7329 | break; |
| 7330 | } |
| 7331 | printf_filtered (_("Hardware assisted breakpoint %d"), b->number); |
| 7332 | say_where = 1; |
| 7333 | break; |
| 7334 | case bp_tracepoint: |
| 7335 | if (ui_out_is_mi_like_p (uiout)) |
| 7336 | { |
| 7337 | say_where = 0; |
| 7338 | break; |
| 7339 | } |
| 7340 | printf_filtered (_("Tracepoint")); |
| 7341 | printf_filtered (_(" %d"), b->number); |
| 7342 | say_where = 1; |
| 7343 | break; |
| 7344 | case bp_fast_tracepoint: |
| 7345 | if (ui_out_is_mi_like_p (uiout)) |
| 7346 | { |
| 7347 | say_where = 0; |
| 7348 | break; |
| 7349 | } |
| 7350 | printf_filtered (_("Fast tracepoint")); |
| 7351 | printf_filtered (_(" %d"), b->number); |
| 7352 | say_where = 1; |
| 7353 | break; |
| 7354 | case bp_static_tracepoint: |
| 7355 | if (ui_out_is_mi_like_p (uiout)) |
| 7356 | { |
| 7357 | say_where = 0; |
| 7358 | break; |
| 7359 | } |
| 7360 | printf_filtered (_("Static tracepoint")); |
| 7361 | printf_filtered (_(" %d"), b->number); |
| 7362 | say_where = 1; |
| 7363 | break; |
| 7364 | |
| 7365 | case bp_until: |
| 7366 | case bp_finish: |
| 7367 | case bp_longjmp: |
| 7368 | case bp_longjmp_resume: |
| 7369 | case bp_exception: |
| 7370 | case bp_exception_resume: |
| 7371 | case bp_step_resume: |
| 7372 | case bp_hp_step_resume: |
| 7373 | case bp_call_dummy: |
| 7374 | case bp_std_terminate: |
| 7375 | case bp_watchpoint_scope: |
| 7376 | case bp_shlib_event: |
| 7377 | case bp_thread_event: |
| 7378 | case bp_overlay_event: |
| 7379 | case bp_jit_event: |
| 7380 | case bp_longjmp_master: |
| 7381 | case bp_std_terminate_master: |
| 7382 | case bp_exception_master: |
| 7383 | case bp_gnu_ifunc_resolver_return: |
| 7384 | break; |
| 7385 | } |
| 7386 | |
| 7387 | if (say_where) |
| 7388 | { |
| 7389 | /* i18n: cagney/2005-02-11: Below needs to be merged into a |
| 7390 | single string. */ |
| 7391 | if (b->loc == NULL) |
| 7392 | { |
| 7393 | printf_filtered (_(" (%s) pending."), b->addr_string); |
| 7394 | } |
| 7395 | else |
| 7396 | { |
| 7397 | if (opts.addressprint || b->source_file == NULL) |
| 7398 | { |
| 7399 | printf_filtered (" at "); |
| 7400 | fputs_filtered (paddress (b->loc->gdbarch, b->loc->address), |
| 7401 | gdb_stdout); |
| 7402 | } |
| 7403 | if (b->source_file) |
| 7404 | printf_filtered (": file %s, line %d.", |
| 7405 | b->source_file, b->line_number); |
| 7406 | |
| 7407 | if (b->loc->next) |
| 7408 | { |
| 7409 | struct bp_location *loc = b->loc; |
| 7410 | int n = 0; |
| 7411 | for (; loc; loc = loc->next) |
| 7412 | ++n; |
| 7413 | printf_filtered (" (%d locations)", n); |
| 7414 | } |
| 7415 | |
| 7416 | } |
| 7417 | } |
| 7418 | if (ui_out_is_mi_like_p (uiout)) |
| 7419 | return; |
| 7420 | printf_filtered ("\n"); |
| 7421 | } |
| 7422 | \f |
| 7423 | |
| 7424 | static struct bp_location * |
| 7425 | add_location_to_breakpoint (struct breakpoint *b, |
| 7426 | const struct symtab_and_line *sal) |
| 7427 | { |
| 7428 | struct bp_location *loc, **tmp; |
| 7429 | |
| 7430 | loc = allocate_bp_location (b); |
| 7431 | for (tmp = &(b->loc); *tmp != NULL; tmp = &((*tmp)->next)) |
| 7432 | ; |
| 7433 | *tmp = loc; |
| 7434 | loc->gdbarch = get_sal_arch (*sal); |
| 7435 | if (!loc->gdbarch) |
| 7436 | loc->gdbarch = b->gdbarch; |
| 7437 | loc->requested_address = sal->pc; |
| 7438 | loc->address = adjust_breakpoint_address (loc->gdbarch, |
| 7439 | loc->requested_address, b->type); |
| 7440 | loc->pspace = sal->pspace; |
| 7441 | gdb_assert (loc->pspace != NULL); |
| 7442 | loc->section = sal->section; |
| 7443 | |
| 7444 | set_breakpoint_location_function (loc, |
| 7445 | sal->explicit_pc || sal->explicit_line); |
| 7446 | return loc; |
| 7447 | } |
| 7448 | \f |
| 7449 | |
| 7450 | /* Return 1 if LOC is pointing to a permanent breakpoint, |
| 7451 | return 0 otherwise. */ |
| 7452 | |
| 7453 | static int |
| 7454 | bp_loc_is_permanent (struct bp_location *loc) |
| 7455 | { |
| 7456 | int len; |
| 7457 | CORE_ADDR addr; |
| 7458 | const gdb_byte *brk; |
| 7459 | gdb_byte *target_mem; |
| 7460 | struct cleanup *cleanup; |
| 7461 | int retval = 0; |
| 7462 | |
| 7463 | gdb_assert (loc != NULL); |
| 7464 | |
| 7465 | addr = loc->address; |
| 7466 | brk = gdbarch_breakpoint_from_pc (loc->gdbarch, &addr, &len); |
| 7467 | |
| 7468 | /* Software breakpoints unsupported? */ |
| 7469 | if (brk == NULL) |
| 7470 | return 0; |
| 7471 | |
| 7472 | target_mem = alloca (len); |
| 7473 | |
| 7474 | /* Enable the automatic memory restoration from breakpoints while |
| 7475 | we read the memory. Otherwise we could say about our temporary |
| 7476 | breakpoints they are permanent. */ |
| 7477 | cleanup = save_current_space_and_thread (); |
| 7478 | |
| 7479 | switch_to_program_space_and_thread (loc->pspace); |
| 7480 | make_show_memory_breakpoints_cleanup (0); |
| 7481 | |
| 7482 | if (target_read_memory (loc->address, target_mem, len) == 0 |
| 7483 | && memcmp (target_mem, brk, len) == 0) |
| 7484 | retval = 1; |
| 7485 | |
| 7486 | do_cleanups (cleanup); |
| 7487 | |
| 7488 | return retval; |
| 7489 | } |
| 7490 | |
| 7491 | |
| 7492 | |
| 7493 | /* Create a breakpoint with SAL as location. Use ADDR_STRING |
| 7494 | as textual description of the location, and COND_STRING |
| 7495 | as condition expression. */ |
| 7496 | |
| 7497 | static void |
| 7498 | create_breakpoint_sal (struct gdbarch *gdbarch, |
| 7499 | struct symtabs_and_lines sals, char *addr_string, |
| 7500 | char *cond_string, |
| 7501 | enum bptype type, enum bpdisp disposition, |
| 7502 | int thread, int task, int ignore_count, |
| 7503 | struct breakpoint_ops *ops, int from_tty, |
| 7504 | int enabled, int internal, int display_canonical) |
| 7505 | { |
| 7506 | struct breakpoint *b = NULL; |
| 7507 | int i; |
| 7508 | |
| 7509 | if (type == bp_hardware_breakpoint) |
| 7510 | { |
| 7511 | int i = hw_breakpoint_used_count (); |
| 7512 | int target_resources_ok = |
| 7513 | target_can_use_hardware_watchpoint (bp_hardware_breakpoint, |
| 7514 | i + 1, 0); |
| 7515 | if (target_resources_ok == 0) |
| 7516 | error (_("No hardware breakpoint support in the target.")); |
| 7517 | else if (target_resources_ok < 0) |
| 7518 | error (_("Hardware breakpoints used exceeds limit.")); |
| 7519 | } |
| 7520 | |
| 7521 | gdb_assert (sals.nelts > 0); |
| 7522 | |
| 7523 | for (i = 0; i < sals.nelts; ++i) |
| 7524 | { |
| 7525 | struct symtab_and_line sal = sals.sals[i]; |
| 7526 | struct bp_location *loc; |
| 7527 | |
| 7528 | if (from_tty) |
| 7529 | { |
| 7530 | struct gdbarch *loc_gdbarch = get_sal_arch (sal); |
| 7531 | if (!loc_gdbarch) |
| 7532 | loc_gdbarch = gdbarch; |
| 7533 | |
| 7534 | describe_other_breakpoints (loc_gdbarch, |
| 7535 | sal.pspace, sal.pc, sal.section, thread); |
| 7536 | } |
| 7537 | |
| 7538 | if (i == 0) |
| 7539 | { |
| 7540 | b = set_raw_breakpoint (gdbarch, sal, type); |
| 7541 | set_breakpoint_number (internal, b); |
| 7542 | b->thread = thread; |
| 7543 | b->task = task; |
| 7544 | |
| 7545 | b->cond_string = cond_string; |
| 7546 | b->ignore_count = ignore_count; |
| 7547 | b->enable_state = enabled ? bp_enabled : bp_disabled; |
| 7548 | b->disposition = disposition; |
| 7549 | b->pspace = sals.sals[0].pspace; |
| 7550 | |
| 7551 | if (type == bp_static_tracepoint) |
| 7552 | { |
| 7553 | struct static_tracepoint_marker marker; |
| 7554 | |
| 7555 | if (is_marker_spec (addr_string)) |
| 7556 | { |
| 7557 | /* We already know the marker exists, otherwise, we |
| 7558 | wouldn't see a sal for it. */ |
| 7559 | char *p = &addr_string[3]; |
| 7560 | char *endp; |
| 7561 | char *marker_str; |
| 7562 | int i; |
| 7563 | |
| 7564 | p = skip_spaces (p); |
| 7565 | |
| 7566 | endp = skip_to_space (p); |
| 7567 | |
| 7568 | marker_str = savestring (p, endp - p); |
| 7569 | b->static_trace_marker_id = marker_str; |
| 7570 | |
| 7571 | printf_filtered (_("Probed static tracepoint " |
| 7572 | "marker \"%s\"\n"), |
| 7573 | b->static_trace_marker_id); |
| 7574 | } |
| 7575 | else if (target_static_tracepoint_marker_at (sal.pc, &marker)) |
| 7576 | { |
| 7577 | b->static_trace_marker_id = xstrdup (marker.str_id); |
| 7578 | release_static_tracepoint_marker (&marker); |
| 7579 | |
| 7580 | printf_filtered (_("Probed static tracepoint " |
| 7581 | "marker \"%s\"\n"), |
| 7582 | b->static_trace_marker_id); |
| 7583 | } |
| 7584 | else |
| 7585 | warning (_("Couldn't determine the static " |
| 7586 | "tracepoint marker to probe")); |
| 7587 | } |
| 7588 | |
| 7589 | if (enabled && b->pspace->executing_startup |
| 7590 | && (b->type == bp_breakpoint |
| 7591 | || b->type == bp_hardware_breakpoint)) |
| 7592 | b->enable_state = bp_startup_disabled; |
| 7593 | |
| 7594 | loc = b->loc; |
| 7595 | } |
| 7596 | else |
| 7597 | { |
| 7598 | loc = add_location_to_breakpoint (b, &sal); |
| 7599 | } |
| 7600 | |
| 7601 | if (bp_loc_is_permanent (loc)) |
| 7602 | make_breakpoint_permanent (b); |
| 7603 | |
| 7604 | if (b->cond_string) |
| 7605 | { |
| 7606 | char *arg = b->cond_string; |
| 7607 | loc->cond = parse_exp_1 (&arg, block_for_pc (loc->address), 0); |
| 7608 | if (*arg) |
| 7609 | error (_("Garbage %s follows condition"), arg); |
| 7610 | } |
| 7611 | } |
| 7612 | |
| 7613 | b->display_canonical = display_canonical; |
| 7614 | if (addr_string) |
| 7615 | b->addr_string = addr_string; |
| 7616 | else |
| 7617 | /* addr_string has to be used or breakpoint_re_set will delete |
| 7618 | me. */ |
| 7619 | b->addr_string |
| 7620 | = xstrprintf ("*%s", paddress (b->loc->gdbarch, b->loc->address)); |
| 7621 | |
| 7622 | b->ops = ops; |
| 7623 | /* Do not mention breakpoints with a negative number, but do |
| 7624 | notify observers. */ |
| 7625 | if (!internal) |
| 7626 | mention (b); |
| 7627 | observer_notify_breakpoint_created (b); |
| 7628 | } |
| 7629 | |
| 7630 | /* Remove element at INDEX_TO_REMOVE from SAL, shifting other |
| 7631 | elements to fill the void space. */ |
| 7632 | static void |
| 7633 | remove_sal (struct symtabs_and_lines *sal, int index_to_remove) |
| 7634 | { |
| 7635 | int i = index_to_remove+1; |
| 7636 | int last_index = sal->nelts-1; |
| 7637 | |
| 7638 | for (;i <= last_index; ++i) |
| 7639 | sal->sals[i-1] = sal->sals[i]; |
| 7640 | |
| 7641 | --(sal->nelts); |
| 7642 | } |
| 7643 | |
| 7644 | /* If appropriate, obtains all sals that correspond to the same file |
| 7645 | and line as SAL, in all program spaces. Users debugging with IDEs, |
| 7646 | will want to set a breakpoint at foo.c:line, and not really care |
| 7647 | about program spaces. This is done only if SAL does not have |
| 7648 | explicit PC and has line and file information. If we got just a |
| 7649 | single expanded sal, return the original. |
| 7650 | |
| 7651 | Otherwise, if SAL.explicit_line is not set, filter out all sals for |
| 7652 | which the name of enclosing function is different from SAL. This |
| 7653 | makes sure that if we have breakpoint originally set in template |
| 7654 | instantiation, say foo<int>(), we won't expand SAL to locations at |
| 7655 | the same line in all existing instantiations of 'foo'. */ |
| 7656 | |
| 7657 | static struct symtabs_and_lines |
| 7658 | expand_line_sal_maybe (struct symtab_and_line sal) |
| 7659 | { |
| 7660 | struct symtabs_and_lines expanded; |
| 7661 | CORE_ADDR original_pc = sal.pc; |
| 7662 | char *original_function = NULL; |
| 7663 | int found; |
| 7664 | int i; |
| 7665 | struct cleanup *old_chain; |
| 7666 | |
| 7667 | /* If we have explicit pc, don't expand. |
| 7668 | If we have no line number, we can't expand. */ |
| 7669 | if (sal.explicit_pc || sal.line == 0 || sal.symtab == NULL) |
| 7670 | { |
| 7671 | expanded.nelts = 1; |
| 7672 | expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| 7673 | expanded.sals[0] = sal; |
| 7674 | return expanded; |
| 7675 | } |
| 7676 | |
| 7677 | sal.pc = 0; |
| 7678 | |
| 7679 | old_chain = save_current_space_and_thread (); |
| 7680 | |
| 7681 | switch_to_program_space_and_thread (sal.pspace); |
| 7682 | |
| 7683 | find_pc_partial_function (original_pc, &original_function, NULL, NULL); |
| 7684 | |
| 7685 | /* Note that expand_line_sal visits *all* program spaces. */ |
| 7686 | expanded = expand_line_sal (sal); |
| 7687 | |
| 7688 | if (expanded.nelts == 1) |
| 7689 | { |
| 7690 | /* We had one sal, we got one sal. Return that sal, adjusting it |
| 7691 | past the function prologue if necessary. */ |
| 7692 | xfree (expanded.sals); |
| 7693 | expanded.nelts = 1; |
| 7694 | expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| 7695 | sal.pc = original_pc; |
| 7696 | expanded.sals[0] = sal; |
| 7697 | skip_prologue_sal (&expanded.sals[0]); |
| 7698 | do_cleanups (old_chain); |
| 7699 | return expanded; |
| 7700 | } |
| 7701 | |
| 7702 | if (!sal.explicit_line) |
| 7703 | { |
| 7704 | CORE_ADDR func_addr, func_end; |
| 7705 | for (i = 0; i < expanded.nelts; ++i) |
| 7706 | { |
| 7707 | CORE_ADDR pc = expanded.sals[i].pc; |
| 7708 | char *this_function; |
| 7709 | |
| 7710 | /* We need to switch threads as well since we're about to |
| 7711 | read memory. */ |
| 7712 | switch_to_program_space_and_thread (expanded.sals[i].pspace); |
| 7713 | |
| 7714 | if (find_pc_partial_function (pc, &this_function, |
| 7715 | &func_addr, &func_end)) |
| 7716 | { |
| 7717 | if (this_function |
| 7718 | && strcmp (this_function, original_function) != 0) |
| 7719 | { |
| 7720 | remove_sal (&expanded, i); |
| 7721 | --i; |
| 7722 | } |
| 7723 | } |
| 7724 | } |
| 7725 | } |
| 7726 | |
| 7727 | /* Skip the function prologue if necessary. */ |
| 7728 | for (i = 0; i < expanded.nelts; ++i) |
| 7729 | skip_prologue_sal (&expanded.sals[i]); |
| 7730 | |
| 7731 | do_cleanups (old_chain); |
| 7732 | |
| 7733 | if (expanded.nelts <= 1) |
| 7734 | { |
| 7735 | /* This is un ugly workaround. If we get zero expanded sals |
| 7736 | then something is really wrong. Fix that by returning the |
| 7737 | original sal. */ |
| 7738 | |
| 7739 | xfree (expanded.sals); |
| 7740 | expanded.nelts = 1; |
| 7741 | expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| 7742 | sal.pc = original_pc; |
| 7743 | expanded.sals[0] = sal; |
| 7744 | return expanded; |
| 7745 | } |
| 7746 | |
| 7747 | if (original_pc) |
| 7748 | { |
| 7749 | found = 0; |
| 7750 | for (i = 0; i < expanded.nelts; ++i) |
| 7751 | if (expanded.sals[i].pc == original_pc) |
| 7752 | { |
| 7753 | found = 1; |
| 7754 | break; |
| 7755 | } |
| 7756 | gdb_assert (found); |
| 7757 | } |
| 7758 | |
| 7759 | return expanded; |
| 7760 | } |
| 7761 | |
| 7762 | /* Add SALS.nelts breakpoints to the breakpoint table. For each |
| 7763 | SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i] |
| 7764 | value. COND_STRING, if not NULL, specified the condition to be |
| 7765 | used for all breakpoints. Essentially the only case where |
| 7766 | SALS.nelts is not 1 is when we set a breakpoint on an overloaded |
| 7767 | function. In that case, it's still not possible to specify |
| 7768 | separate conditions for different overloaded functions, so |
| 7769 | we take just a single condition string. |
| 7770 | |
| 7771 | NOTE: If the function succeeds, the caller is expected to cleanup |
| 7772 | the arrays ADDR_STRING, COND_STRING, and SALS (but not the |
| 7773 | array contents). If the function fails (error() is called), the |
| 7774 | caller is expected to cleanups both the ADDR_STRING, COND_STRING, |
| 7775 | COND and SALS arrays and each of those arrays contents. */ |
| 7776 | |
| 7777 | static void |
| 7778 | create_breakpoints_sal (struct gdbarch *gdbarch, |
| 7779 | struct symtabs_and_lines sals, |
| 7780 | struct linespec_result *canonical, |
| 7781 | char *cond_string, |
| 7782 | enum bptype type, enum bpdisp disposition, |
| 7783 | int thread, int task, int ignore_count, |
| 7784 | struct breakpoint_ops *ops, int from_tty, |
| 7785 | int enabled, int internal) |
| 7786 | { |
| 7787 | int i; |
| 7788 | |
| 7789 | for (i = 0; i < sals.nelts; ++i) |
| 7790 | { |
| 7791 | struct symtabs_and_lines expanded = |
| 7792 | expand_line_sal_maybe (sals.sals[i]); |
| 7793 | |
| 7794 | create_breakpoint_sal (gdbarch, expanded, canonical->canonical[i], |
| 7795 | cond_string, type, disposition, |
| 7796 | thread, task, ignore_count, ops, |
| 7797 | from_tty, enabled, internal, |
| 7798 | canonical->special_display); |
| 7799 | } |
| 7800 | } |
| 7801 | |
| 7802 | /* Parse ADDRESS which is assumed to be a SAL specification possibly |
| 7803 | followed by conditionals. On return, SALS contains an array of SAL |
| 7804 | addresses found. ADDR_STRING contains a vector of (canonical) |
| 7805 | address strings. ADDRESS points to the end of the SAL. |
| 7806 | |
| 7807 | The array and the line spec strings are allocated on the heap, it is |
| 7808 | the caller's responsibility to free them. */ |
| 7809 | |
| 7810 | static void |
| 7811 | parse_breakpoint_sals (char **address, |
| 7812 | struct symtabs_and_lines *sals, |
| 7813 | struct linespec_result *canonical) |
| 7814 | { |
| 7815 | char *addr_start = *address; |
| 7816 | |
| 7817 | /* If no arg given, or if first arg is 'if ', use the default |
| 7818 | breakpoint. */ |
| 7819 | if ((*address) == NULL |
| 7820 | || (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2]))) |
| 7821 | { |
| 7822 | if (default_breakpoint_valid) |
| 7823 | { |
| 7824 | struct symtab_and_line sal; |
| 7825 | |
| 7826 | init_sal (&sal); /* Initialize to zeroes. */ |
| 7827 | sals->sals = (struct symtab_and_line *) |
| 7828 | xmalloc (sizeof (struct symtab_and_line)); |
| 7829 | sal.pc = default_breakpoint_address; |
| 7830 | sal.line = default_breakpoint_line; |
| 7831 | sal.symtab = default_breakpoint_symtab; |
| 7832 | sal.pspace = default_breakpoint_pspace; |
| 7833 | sal.section = find_pc_overlay (sal.pc); |
| 7834 | |
| 7835 | /* "break" without arguments is equivalent to "break *PC" |
| 7836 | where PC is the default_breakpoint_address. So make sure |
| 7837 | to set sal.explicit_pc to prevent GDB from trying to |
| 7838 | expand the list of sals to include all other instances |
| 7839 | with the same symtab and line. */ |
| 7840 | sal.explicit_pc = 1; |
| 7841 | |
| 7842 | sals->sals[0] = sal; |
| 7843 | sals->nelts = 1; |
| 7844 | } |
| 7845 | else |
| 7846 | error (_("No default breakpoint address now.")); |
| 7847 | } |
| 7848 | else |
| 7849 | { |
| 7850 | /* Force almost all breakpoints to be in terms of the |
| 7851 | current_source_symtab (which is decode_line_1's default). |
| 7852 | This should produce the results we want almost all of the |
| 7853 | time while leaving default_breakpoint_* alone. |
| 7854 | |
| 7855 | ObjC: However, don't match an Objective-C method name which |
| 7856 | may have a '+' or '-' succeeded by a '[' */ |
| 7857 | |
| 7858 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| 7859 | |
| 7860 | if (default_breakpoint_valid |
| 7861 | && (!cursal.symtab |
| 7862 | || ((strchr ("+-", (*address)[0]) != NULL) |
| 7863 | && ((*address)[1] != '[')))) |
| 7864 | *sals = decode_line_1 (address, 1, default_breakpoint_symtab, |
| 7865 | default_breakpoint_line, canonical); |
| 7866 | else |
| 7867 | *sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, |
| 7868 | canonical); |
| 7869 | } |
| 7870 | /* For any SAL that didn't have a canonical string, fill one in. */ |
| 7871 | if (sals->nelts > 0 && canonical->canonical == NULL) |
| 7872 | canonical->canonical = xcalloc (sals->nelts, sizeof (char *)); |
| 7873 | if (addr_start != (*address)) |
| 7874 | { |
| 7875 | int i; |
| 7876 | |
| 7877 | for (i = 0; i < sals->nelts; i++) |
| 7878 | { |
| 7879 | /* Add the string if not present. */ |
| 7880 | if (canonical->canonical[i] == NULL) |
| 7881 | canonical->canonical[i] = savestring (addr_start, |
| 7882 | (*address) - addr_start); |
| 7883 | } |
| 7884 | } |
| 7885 | } |
| 7886 | |
| 7887 | |
| 7888 | /* Convert each SAL into a real PC. Verify that the PC can be |
| 7889 | inserted as a breakpoint. If it can't throw an error. */ |
| 7890 | |
| 7891 | static void |
| 7892 | breakpoint_sals_to_pc (struct symtabs_and_lines *sals) |
| 7893 | { |
| 7894 | int i; |
| 7895 | |
| 7896 | for (i = 0; i < sals->nelts; i++) |
| 7897 | resolve_sal_pc (&sals->sals[i]); |
| 7898 | } |
| 7899 | |
| 7900 | /* Fast tracepoints may have restrictions on valid locations. For |
| 7901 | instance, a fast tracepoint using a jump instead of a trap will |
| 7902 | likely have to overwrite more bytes than a trap would, and so can |
| 7903 | only be placed where the instruction is longer than the jump, or a |
| 7904 | multi-instruction sequence does not have a jump into the middle of |
| 7905 | it, etc. */ |
| 7906 | |
| 7907 | static void |
| 7908 | check_fast_tracepoint_sals (struct gdbarch *gdbarch, |
| 7909 | struct symtabs_and_lines *sals) |
| 7910 | { |
| 7911 | int i, rslt; |
| 7912 | struct symtab_and_line *sal; |
| 7913 | char *msg; |
| 7914 | struct cleanup *old_chain; |
| 7915 | |
| 7916 | for (i = 0; i < sals->nelts; i++) |
| 7917 | { |
| 7918 | sal = &sals->sals[i]; |
| 7919 | |
| 7920 | rslt = gdbarch_fast_tracepoint_valid_at (gdbarch, sal->pc, |
| 7921 | NULL, &msg); |
| 7922 | old_chain = make_cleanup (xfree, msg); |
| 7923 | |
| 7924 | if (!rslt) |
| 7925 | error (_("May not have a fast tracepoint at 0x%s%s"), |
| 7926 | paddress (gdbarch, sal->pc), (msg ? msg : "")); |
| 7927 | |
| 7928 | do_cleanups (old_chain); |
| 7929 | } |
| 7930 | } |
| 7931 | |
| 7932 | /* Given TOK, a string specification of condition and thread, as |
| 7933 | accepted by the 'break' command, extract the condition |
| 7934 | string and thread number and set *COND_STRING and *THREAD. |
| 7935 | PC identifies the context at which the condition should be parsed. |
| 7936 | If no condition is found, *COND_STRING is set to NULL. |
| 7937 | If no thread is found, *THREAD is set to -1. */ |
| 7938 | static void |
| 7939 | find_condition_and_thread (char *tok, CORE_ADDR pc, |
| 7940 | char **cond_string, int *thread, int *task) |
| 7941 | { |
| 7942 | *cond_string = NULL; |
| 7943 | *thread = -1; |
| 7944 | while (tok && *tok) |
| 7945 | { |
| 7946 | char *end_tok; |
| 7947 | int toklen; |
| 7948 | char *cond_start = NULL; |
| 7949 | char *cond_end = NULL; |
| 7950 | |
| 7951 | tok = skip_spaces (tok); |
| 7952 | |
| 7953 | end_tok = skip_to_space (tok); |
| 7954 | |
| 7955 | toklen = end_tok - tok; |
| 7956 | |
| 7957 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| 7958 | { |
| 7959 | struct expression *expr; |
| 7960 | |
| 7961 | tok = cond_start = end_tok + 1; |
| 7962 | expr = parse_exp_1 (&tok, block_for_pc (pc), 0); |
| 7963 | xfree (expr); |
| 7964 | cond_end = tok; |
| 7965 | *cond_string = savestring (cond_start, |
| 7966 | cond_end - cond_start); |
| 7967 | } |
| 7968 | else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0) |
| 7969 | { |
| 7970 | char *tmptok; |
| 7971 | |
| 7972 | tok = end_tok + 1; |
| 7973 | tmptok = tok; |
| 7974 | *thread = strtol (tok, &tok, 0); |
| 7975 | if (tok == tmptok) |
| 7976 | error (_("Junk after thread keyword.")); |
| 7977 | if (!valid_thread_id (*thread)) |
| 7978 | error (_("Unknown thread %d."), *thread); |
| 7979 | } |
| 7980 | else if (toklen >= 1 && strncmp (tok, "task", toklen) == 0) |
| 7981 | { |
| 7982 | char *tmptok; |
| 7983 | |
| 7984 | tok = end_tok + 1; |
| 7985 | tmptok = tok; |
| 7986 | *task = strtol (tok, &tok, 0); |
| 7987 | if (tok == tmptok) |
| 7988 | error (_("Junk after task keyword.")); |
| 7989 | if (!valid_task_id (*task)) |
| 7990 | error (_("Unknown task %d."), *task); |
| 7991 | } |
| 7992 | else |
| 7993 | error (_("Junk at end of arguments.")); |
| 7994 | } |
| 7995 | } |
| 7996 | |
| 7997 | /* Decode a static tracepoint marker spec. */ |
| 7998 | |
| 7999 | static struct symtabs_and_lines |
| 8000 | decode_static_tracepoint_spec (char **arg_p) |
| 8001 | { |
| 8002 | VEC(static_tracepoint_marker_p) *markers = NULL; |
| 8003 | struct symtabs_and_lines sals; |
| 8004 | struct symtab_and_line sal; |
| 8005 | struct symbol *sym; |
| 8006 | struct cleanup *old_chain; |
| 8007 | char *p = &(*arg_p)[3]; |
| 8008 | char *endp; |
| 8009 | char *marker_str; |
| 8010 | int i; |
| 8011 | |
| 8012 | p = skip_spaces (p); |
| 8013 | |
| 8014 | endp = skip_to_space (p); |
| 8015 | |
| 8016 | marker_str = savestring (p, endp - p); |
| 8017 | old_chain = make_cleanup (xfree, marker_str); |
| 8018 | |
| 8019 | markers = target_static_tracepoint_markers_by_strid (marker_str); |
| 8020 | if (VEC_empty(static_tracepoint_marker_p, markers)) |
| 8021 | error (_("No known static tracepoint marker named %s"), marker_str); |
| 8022 | |
| 8023 | sals.nelts = VEC_length(static_tracepoint_marker_p, markers); |
| 8024 | sals.sals = xmalloc (sizeof *sals.sals * sals.nelts); |
| 8025 | |
| 8026 | for (i = 0; i < sals.nelts; i++) |
| 8027 | { |
| 8028 | struct static_tracepoint_marker *marker; |
| 8029 | |
| 8030 | marker = VEC_index (static_tracepoint_marker_p, markers, i); |
| 8031 | |
| 8032 | init_sal (&sals.sals[i]); |
| 8033 | |
| 8034 | sals.sals[i] = find_pc_line (marker->address, 0); |
| 8035 | sals.sals[i].pc = marker->address; |
| 8036 | |
| 8037 | release_static_tracepoint_marker (marker); |
| 8038 | } |
| 8039 | |
| 8040 | do_cleanups (old_chain); |
| 8041 | |
| 8042 | *arg_p = endp; |
| 8043 | return sals; |
| 8044 | } |
| 8045 | |
| 8046 | /* Set a breakpoint. This function is shared between CLI and MI |
| 8047 | functions for setting a breakpoint. This function has two major |
| 8048 | modes of operations, selected by the PARSE_CONDITION_AND_THREAD |
| 8049 | parameter. If non-zero, the function will parse arg, extracting |
| 8050 | breakpoint location, address and thread. Otherwise, ARG is just |
| 8051 | the location of breakpoint, with condition and thread specified by |
| 8052 | the COND_STRING and THREAD parameters. If INTERNAL is non-zero, |
| 8053 | the breakpoint number will be allocated from the internal |
| 8054 | breakpoint count. Returns true if any breakpoint was created; |
| 8055 | false otherwise. */ |
| 8056 | |
| 8057 | int |
| 8058 | create_breakpoint (struct gdbarch *gdbarch, |
| 8059 | char *arg, char *cond_string, int thread, |
| 8060 | int parse_condition_and_thread, |
| 8061 | int tempflag, enum bptype type_wanted, |
| 8062 | int ignore_count, |
| 8063 | enum auto_boolean pending_break_support, |
| 8064 | struct breakpoint_ops *ops, |
| 8065 | int from_tty, int enabled, int internal) |
| 8066 | { |
| 8067 | volatile struct gdb_exception e; |
| 8068 | struct symtabs_and_lines sals; |
| 8069 | struct symtab_and_line pending_sal; |
| 8070 | char *copy_arg; |
| 8071 | char *addr_start = arg; |
| 8072 | struct linespec_result canonical; |
| 8073 | struct cleanup *old_chain; |
| 8074 | struct cleanup *bkpt_chain = NULL; |
| 8075 | int i; |
| 8076 | int pending = 0; |
| 8077 | int task = 0; |
| 8078 | int prev_bkpt_count = breakpoint_count; |
| 8079 | |
| 8080 | sals.sals = NULL; |
| 8081 | sals.nelts = 0; |
| 8082 | init_linespec_result (&canonical); |
| 8083 | |
| 8084 | if (type_wanted == bp_static_tracepoint && is_marker_spec (arg)) |
| 8085 | { |
| 8086 | int i; |
| 8087 | |
| 8088 | sals = decode_static_tracepoint_spec (&arg); |
| 8089 | |
| 8090 | copy_arg = savestring (addr_start, arg - addr_start); |
| 8091 | canonical.canonical = xcalloc (sals.nelts, sizeof (char *)); |
| 8092 | for (i = 0; i < sals.nelts; i++) |
| 8093 | canonical.canonical[i] = xstrdup (copy_arg); |
| 8094 | goto done; |
| 8095 | } |
| 8096 | |
| 8097 | TRY_CATCH (e, RETURN_MASK_ALL) |
| 8098 | { |
| 8099 | parse_breakpoint_sals (&arg, &sals, &canonical); |
| 8100 | } |
| 8101 | |
| 8102 | /* If caller is interested in rc value from parse, set value. */ |
| 8103 | switch (e.reason) |
| 8104 | { |
| 8105 | case RETURN_QUIT: |
| 8106 | throw_exception (e); |
| 8107 | case RETURN_ERROR: |
| 8108 | switch (e.error) |
| 8109 | { |
| 8110 | case NOT_FOUND_ERROR: |
| 8111 | |
| 8112 | /* If pending breakpoint support is turned off, throw |
| 8113 | error. */ |
| 8114 | |
| 8115 | if (pending_break_support == AUTO_BOOLEAN_FALSE) |
| 8116 | throw_exception (e); |
| 8117 | |
| 8118 | exception_print (gdb_stderr, e); |
| 8119 | |
| 8120 | /* If pending breakpoint support is auto query and the user |
| 8121 | selects no, then simply return the error code. */ |
| 8122 | if (pending_break_support == AUTO_BOOLEAN_AUTO |
| 8123 | && !nquery (_("Make breakpoint pending on " |
| 8124 | "future shared library load? "))) |
| 8125 | return 0; |
| 8126 | |
| 8127 | /* At this point, either the user was queried about setting |
| 8128 | a pending breakpoint and selected yes, or pending |
| 8129 | breakpoint behavior is on and thus a pending breakpoint |
| 8130 | is defaulted on behalf of the user. */ |
| 8131 | copy_arg = xstrdup (addr_start); |
| 8132 | canonical.canonical = ©_arg; |
| 8133 | sals.nelts = 1; |
| 8134 | sals.sals = &pending_sal; |
| 8135 | pending_sal.pc = 0; |
| 8136 | pending = 1; |
| 8137 | break; |
| 8138 | default: |
| 8139 | throw_exception (e); |
| 8140 | } |
| 8141 | break; |
| 8142 | default: |
| 8143 | if (!sals.nelts) |
| 8144 | return 0; |
| 8145 | } |
| 8146 | |
| 8147 | done: |
| 8148 | |
| 8149 | /* Create a chain of things that always need to be cleaned up. */ |
| 8150 | old_chain = make_cleanup (null_cleanup, 0); |
| 8151 | |
| 8152 | if (!pending) |
| 8153 | { |
| 8154 | /* Make sure that all storage allocated to SALS gets freed. */ |
| 8155 | make_cleanup (xfree, sals.sals); |
| 8156 | |
| 8157 | /* Cleanup the canonical array but not its contents. */ |
| 8158 | make_cleanup (xfree, canonical.canonical); |
| 8159 | } |
| 8160 | |
| 8161 | /* ----------------------------- SNIP ----------------------------- |
| 8162 | Anything added to the cleanup chain beyond this point is assumed |
| 8163 | to be part of a breakpoint. If the breakpoint create succeeds |
| 8164 | then the memory is not reclaimed. */ |
| 8165 | bkpt_chain = make_cleanup (null_cleanup, 0); |
| 8166 | |
| 8167 | /* Mark the contents of the canonical for cleanup. These go on |
| 8168 | the bkpt_chain and only occur if the breakpoint create fails. */ |
| 8169 | for (i = 0; i < sals.nelts; i++) |
| 8170 | { |
| 8171 | if (canonical.canonical[i] != NULL) |
| 8172 | make_cleanup (xfree, canonical.canonical[i]); |
| 8173 | } |
| 8174 | |
| 8175 | /* Resolve all line numbers to PC's and verify that the addresses |
| 8176 | are ok for the target. */ |
| 8177 | if (!pending) |
| 8178 | breakpoint_sals_to_pc (&sals); |
| 8179 | |
| 8180 | /* Fast tracepoints may have additional restrictions on location. */ |
| 8181 | if (type_wanted == bp_fast_tracepoint) |
| 8182 | check_fast_tracepoint_sals (gdbarch, &sals); |
| 8183 | |
| 8184 | /* Verify that condition can be parsed, before setting any |
| 8185 | breakpoints. Allocate a separate condition expression for each |
| 8186 | breakpoint. */ |
| 8187 | if (!pending) |
| 8188 | { |
| 8189 | if (parse_condition_and_thread) |
| 8190 | { |
| 8191 | /* Here we only parse 'arg' to separate condition |
| 8192 | from thread number, so parsing in context of first |
| 8193 | sal is OK. When setting the breakpoint we'll |
| 8194 | re-parse it in context of each sal. */ |
| 8195 | cond_string = NULL; |
| 8196 | thread = -1; |
| 8197 | find_condition_and_thread (arg, sals.sals[0].pc, &cond_string, |
| 8198 | &thread, &task); |
| 8199 | if (cond_string) |
| 8200 | make_cleanup (xfree, cond_string); |
| 8201 | } |
| 8202 | else |
| 8203 | { |
| 8204 | /* Create a private copy of condition string. */ |
| 8205 | if (cond_string) |
| 8206 | { |
| 8207 | cond_string = xstrdup (cond_string); |
| 8208 | make_cleanup (xfree, cond_string); |
| 8209 | } |
| 8210 | } |
| 8211 | |
| 8212 | /* If the user is creating a static tracepoint by marker id |
| 8213 | (strace -m MARKER_ID), then store the sals index, so that |
| 8214 | breakpoint_re_set can try to match up which of the newly |
| 8215 | found markers corresponds to this one, and, don't try to |
| 8216 | expand multiple locations for each sal, given than SALS |
| 8217 | already should contain all sals for MARKER_ID. */ |
| 8218 | if (type_wanted == bp_static_tracepoint |
| 8219 | && is_marker_spec (canonical.canonical[0])) |
| 8220 | { |
| 8221 | int i; |
| 8222 | |
| 8223 | for (i = 0; i < sals.nelts; ++i) |
| 8224 | { |
| 8225 | struct symtabs_and_lines expanded; |
| 8226 | struct breakpoint *tp; |
| 8227 | struct cleanup *old_chain; |
| 8228 | |
| 8229 | expanded.nelts = 1; |
| 8230 | expanded.sals = xmalloc (sizeof (struct symtab_and_line)); |
| 8231 | expanded.sals[0] = sals.sals[i]; |
| 8232 | old_chain = make_cleanup (xfree, expanded.sals); |
| 8233 | |
| 8234 | create_breakpoint_sal (gdbarch, expanded, canonical.canonical[i], |
| 8235 | cond_string, type_wanted, |
| 8236 | tempflag ? disp_del : disp_donttouch, |
| 8237 | thread, task, ignore_count, ops, |
| 8238 | from_tty, enabled, internal, |
| 8239 | canonical.special_display); |
| 8240 | |
| 8241 | do_cleanups (old_chain); |
| 8242 | |
| 8243 | /* Get the tracepoint we just created. */ |
| 8244 | if (internal) |
| 8245 | tp = get_breakpoint (internal_breakpoint_number); |
| 8246 | else |
| 8247 | tp = get_breakpoint (breakpoint_count); |
| 8248 | gdb_assert (tp != NULL); |
| 8249 | |
| 8250 | /* Given that its possible to have multiple markers with |
| 8251 | the same string id, if the user is creating a static |
| 8252 | tracepoint by marker id ("strace -m MARKER_ID"), then |
| 8253 | store the sals index, so that breakpoint_re_set can |
| 8254 | try to match up which of the newly found markers |
| 8255 | corresponds to this one */ |
| 8256 | tp->static_trace_marker_id_idx = i; |
| 8257 | } |
| 8258 | } |
| 8259 | else |
| 8260 | create_breakpoints_sal (gdbarch, sals, &canonical, cond_string, |
| 8261 | type_wanted, |
| 8262 | tempflag ? disp_del : disp_donttouch, |
| 8263 | thread, task, ignore_count, ops, from_tty, |
| 8264 | enabled, internal); |
| 8265 | } |
| 8266 | else |
| 8267 | { |
| 8268 | struct breakpoint *b; |
| 8269 | |
| 8270 | make_cleanup (xfree, copy_arg); |
| 8271 | |
| 8272 | b = set_raw_breakpoint_without_location (gdbarch, type_wanted); |
| 8273 | set_breakpoint_number (internal, b); |
| 8274 | b->thread = -1; |
| 8275 | b->addr_string = canonical.canonical[0]; |
| 8276 | b->cond_string = NULL; |
| 8277 | b->ignore_count = ignore_count; |
| 8278 | b->disposition = tempflag ? disp_del : disp_donttouch; |
| 8279 | b->condition_not_parsed = 1; |
| 8280 | b->ops = ops; |
| 8281 | b->enable_state = enabled ? bp_enabled : bp_disabled; |
| 8282 | b->pspace = current_program_space; |
| 8283 | b->py_bp_object = NULL; |
| 8284 | |
| 8285 | if (enabled && b->pspace->executing_startup |
| 8286 | && (b->type == bp_breakpoint |
| 8287 | || b->type == bp_hardware_breakpoint)) |
| 8288 | b->enable_state = bp_startup_disabled; |
| 8289 | |
| 8290 | if (!internal) |
| 8291 | /* Do not mention breakpoints with a negative number, |
| 8292 | but do notify observers. */ |
| 8293 | mention (b); |
| 8294 | observer_notify_breakpoint_created (b); |
| 8295 | } |
| 8296 | |
| 8297 | if (sals.nelts > 1) |
| 8298 | { |
| 8299 | warning (_("Multiple breakpoints were set.\nUse the " |
| 8300 | "\"delete\" command to delete unwanted breakpoints.")); |
| 8301 | prev_breakpoint_count = prev_bkpt_count; |
| 8302 | } |
| 8303 | |
| 8304 | /* That's it. Discard the cleanups for data inserted into the |
| 8305 | breakpoint. */ |
| 8306 | discard_cleanups (bkpt_chain); |
| 8307 | /* But cleanup everything else. */ |
| 8308 | do_cleanups (old_chain); |
| 8309 | |
| 8310 | /* error call may happen here - have BKPT_CHAIN already discarded. */ |
| 8311 | update_global_location_list (1); |
| 8312 | |
| 8313 | return 1; |
| 8314 | } |
| 8315 | |
| 8316 | /* Set a breakpoint. |
| 8317 | ARG is a string describing breakpoint address, |
| 8318 | condition, and thread. |
| 8319 | FLAG specifies if a breakpoint is hardware on, |
| 8320 | and if breakpoint is temporary, using BP_HARDWARE_FLAG |
| 8321 | and BP_TEMPFLAG. */ |
| 8322 | |
| 8323 | static void |
| 8324 | break_command_1 (char *arg, int flag, int from_tty) |
| 8325 | { |
| 8326 | int tempflag = flag & BP_TEMPFLAG; |
| 8327 | enum bptype type_wanted = (flag & BP_HARDWAREFLAG |
| 8328 | ? bp_hardware_breakpoint |
| 8329 | : bp_breakpoint); |
| 8330 | |
| 8331 | create_breakpoint (get_current_arch (), |
| 8332 | arg, |
| 8333 | NULL, 0, 1 /* parse arg */, |
| 8334 | tempflag, type_wanted, |
| 8335 | 0 /* Ignore count */, |
| 8336 | pending_break_support, |
| 8337 | NULL /* breakpoint_ops */, |
| 8338 | from_tty, |
| 8339 | 1 /* enabled */, |
| 8340 | 0 /* internal */); |
| 8341 | } |
| 8342 | |
| 8343 | |
| 8344 | /* Helper function for break_command_1 and disassemble_command. */ |
| 8345 | |
| 8346 | void |
| 8347 | resolve_sal_pc (struct symtab_and_line *sal) |
| 8348 | { |
| 8349 | CORE_ADDR pc; |
| 8350 | |
| 8351 | if (sal->pc == 0 && sal->symtab != NULL) |
| 8352 | { |
| 8353 | if (!find_line_pc (sal->symtab, sal->line, &pc)) |
| 8354 | error (_("No line %d in file \"%s\"."), |
| 8355 | sal->line, sal->symtab->filename); |
| 8356 | sal->pc = pc; |
| 8357 | |
| 8358 | /* If this SAL corresponds to a breakpoint inserted using a line |
| 8359 | number, then skip the function prologue if necessary. */ |
| 8360 | if (sal->explicit_line) |
| 8361 | skip_prologue_sal (sal); |
| 8362 | } |
| 8363 | |
| 8364 | if (sal->section == 0 && sal->symtab != NULL) |
| 8365 | { |
| 8366 | struct blockvector *bv; |
| 8367 | struct block *b; |
| 8368 | struct symbol *sym; |
| 8369 | |
| 8370 | bv = blockvector_for_pc_sect (sal->pc, 0, &b, sal->symtab); |
| 8371 | if (bv != NULL) |
| 8372 | { |
| 8373 | sym = block_linkage_function (b); |
| 8374 | if (sym != NULL) |
| 8375 | { |
| 8376 | fixup_symbol_section (sym, sal->symtab->objfile); |
| 8377 | sal->section = SYMBOL_OBJ_SECTION (sym); |
| 8378 | } |
| 8379 | else |
| 8380 | { |
| 8381 | /* It really is worthwhile to have the section, so we'll |
| 8382 | just have to look harder. This case can be executed |
| 8383 | if we have line numbers but no functions (as can |
| 8384 | happen in assembly source). */ |
| 8385 | |
| 8386 | struct minimal_symbol *msym; |
| 8387 | struct cleanup *old_chain = save_current_space_and_thread (); |
| 8388 | |
| 8389 | switch_to_program_space_and_thread (sal->pspace); |
| 8390 | |
| 8391 | msym = lookup_minimal_symbol_by_pc (sal->pc); |
| 8392 | if (msym) |
| 8393 | sal->section = SYMBOL_OBJ_SECTION (msym); |
| 8394 | |
| 8395 | do_cleanups (old_chain); |
| 8396 | } |
| 8397 | } |
| 8398 | } |
| 8399 | } |
| 8400 | |
| 8401 | void |
| 8402 | break_command (char *arg, int from_tty) |
| 8403 | { |
| 8404 | break_command_1 (arg, 0, from_tty); |
| 8405 | } |
| 8406 | |
| 8407 | void |
| 8408 | tbreak_command (char *arg, int from_tty) |
| 8409 | { |
| 8410 | break_command_1 (arg, BP_TEMPFLAG, from_tty); |
| 8411 | } |
| 8412 | |
| 8413 | static void |
| 8414 | hbreak_command (char *arg, int from_tty) |
| 8415 | { |
| 8416 | break_command_1 (arg, BP_HARDWAREFLAG, from_tty); |
| 8417 | } |
| 8418 | |
| 8419 | static void |
| 8420 | thbreak_command (char *arg, int from_tty) |
| 8421 | { |
| 8422 | break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty); |
| 8423 | } |
| 8424 | |
| 8425 | static void |
| 8426 | stop_command (char *arg, int from_tty) |
| 8427 | { |
| 8428 | printf_filtered (_("Specify the type of breakpoint to set.\n\ |
| 8429 | Usage: stop in <function | address>\n\ |
| 8430 | stop at <line>\n")); |
| 8431 | } |
| 8432 | |
| 8433 | static void |
| 8434 | stopin_command (char *arg, int from_tty) |
| 8435 | { |
| 8436 | int badInput = 0; |
| 8437 | |
| 8438 | if (arg == (char *) NULL) |
| 8439 | badInput = 1; |
| 8440 | else if (*arg != '*') |
| 8441 | { |
| 8442 | char *argptr = arg; |
| 8443 | int hasColon = 0; |
| 8444 | |
| 8445 | /* Look for a ':'. If this is a line number specification, then |
| 8446 | say it is bad, otherwise, it should be an address or |
| 8447 | function/method name. */ |
| 8448 | while (*argptr && !hasColon) |
| 8449 | { |
| 8450 | hasColon = (*argptr == ':'); |
| 8451 | argptr++; |
| 8452 | } |
| 8453 | |
| 8454 | if (hasColon) |
| 8455 | badInput = (*argptr != ':'); /* Not a class::method */ |
| 8456 | else |
| 8457 | badInput = isdigit (*arg); /* a simple line number */ |
| 8458 | } |
| 8459 | |
| 8460 | if (badInput) |
| 8461 | printf_filtered (_("Usage: stop in <function | address>\n")); |
| 8462 | else |
| 8463 | break_command_1 (arg, 0, from_tty); |
| 8464 | } |
| 8465 | |
| 8466 | static void |
| 8467 | stopat_command (char *arg, int from_tty) |
| 8468 | { |
| 8469 | int badInput = 0; |
| 8470 | |
| 8471 | if (arg == (char *) NULL || *arg == '*') /* no line number */ |
| 8472 | badInput = 1; |
| 8473 | else |
| 8474 | { |
| 8475 | char *argptr = arg; |
| 8476 | int hasColon = 0; |
| 8477 | |
| 8478 | /* Look for a ':'. If there is a '::' then get out, otherwise |
| 8479 | it is probably a line number. */ |
| 8480 | while (*argptr && !hasColon) |
| 8481 | { |
| 8482 | hasColon = (*argptr == ':'); |
| 8483 | argptr++; |
| 8484 | } |
| 8485 | |
| 8486 | if (hasColon) |
| 8487 | badInput = (*argptr == ':'); /* we have class::method */ |
| 8488 | else |
| 8489 | badInput = !isdigit (*arg); /* not a line number */ |
| 8490 | } |
| 8491 | |
| 8492 | if (badInput) |
| 8493 | printf_filtered (_("Usage: stop at <line>\n")); |
| 8494 | else |
| 8495 | break_command_1 (arg, 0, from_tty); |
| 8496 | } |
| 8497 | |
| 8498 | /* Implement the "breakpoint_hit" breakpoint_ops method for |
| 8499 | ranged breakpoints. */ |
| 8500 | |
| 8501 | static int |
| 8502 | breakpoint_hit_ranged_breakpoint (const struct bp_location *bl, |
| 8503 | struct address_space *aspace, |
| 8504 | CORE_ADDR bp_addr) |
| 8505 | { |
| 8506 | return breakpoint_address_match_range (bl->pspace->aspace, bl->address, |
| 8507 | bl->length, aspace, bp_addr); |
| 8508 | } |
| 8509 | |
| 8510 | /* Implement the "resources_needed" breakpoint_ops method for |
| 8511 | ranged breakpoints. */ |
| 8512 | |
| 8513 | static int |
| 8514 | resources_needed_ranged_breakpoint (const struct bp_location *bl) |
| 8515 | { |
| 8516 | return target_ranged_break_num_registers (); |
| 8517 | } |
| 8518 | |
| 8519 | /* Implement the "print_it" breakpoint_ops method for |
| 8520 | ranged breakpoints. */ |
| 8521 | |
| 8522 | static enum print_stop_action |
| 8523 | print_it_ranged_breakpoint (struct breakpoint *b) |
| 8524 | { |
| 8525 | struct bp_location *bl = b->loc; |
| 8526 | |
| 8527 | gdb_assert (b->type == bp_hardware_breakpoint); |
| 8528 | |
| 8529 | /* Ranged breakpoints have only one location. */ |
| 8530 | gdb_assert (bl && bl->next == NULL); |
| 8531 | |
| 8532 | annotate_breakpoint (b->number); |
| 8533 | if (b->disposition == disp_del) |
| 8534 | ui_out_text (uiout, "\nTemporary ranged breakpoint "); |
| 8535 | else |
| 8536 | ui_out_text (uiout, "\nRanged breakpoint "); |
| 8537 | if (ui_out_is_mi_like_p (uiout)) |
| 8538 | { |
| 8539 | ui_out_field_string (uiout, "reason", |
| 8540 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
| 8541 | ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| 8542 | } |
| 8543 | ui_out_field_int (uiout, "bkptno", b->number); |
| 8544 | ui_out_text (uiout, ", "); |
| 8545 | |
| 8546 | return PRINT_SRC_AND_LOC; |
| 8547 | } |
| 8548 | |
| 8549 | /* Implement the "print_one" breakpoint_ops method for |
| 8550 | ranged breakpoints. */ |
| 8551 | |
| 8552 | static void |
| 8553 | print_one_ranged_breakpoint (struct breakpoint *b, |
| 8554 | struct bp_location **last_loc) |
| 8555 | { |
| 8556 | struct bp_location *bl = b->loc; |
| 8557 | struct value_print_options opts; |
| 8558 | |
| 8559 | /* Ranged breakpoints have only one location. */ |
| 8560 | gdb_assert (bl && bl->next == NULL); |
| 8561 | |
| 8562 | get_user_print_options (&opts); |
| 8563 | |
| 8564 | if (opts.addressprint) |
| 8565 | /* We don't print the address range here, it will be printed later |
| 8566 | by print_one_detail_ranged_breakpoint. */ |
| 8567 | ui_out_field_skip (uiout, "addr"); |
| 8568 | annotate_field (5); |
| 8569 | print_breakpoint_location (b, bl); |
| 8570 | *last_loc = bl; |
| 8571 | } |
| 8572 | |
| 8573 | /* Implement the "print_one_detail" breakpoint_ops method for |
| 8574 | ranged breakpoints. */ |
| 8575 | |
| 8576 | static void |
| 8577 | print_one_detail_ranged_breakpoint (const struct breakpoint *b, |
| 8578 | struct ui_out *uiout) |
| 8579 | { |
| 8580 | CORE_ADDR address_start, address_end; |
| 8581 | struct bp_location *bl = b->loc; |
| 8582 | struct ui_stream *stb = ui_out_stream_new (uiout); |
| 8583 | struct cleanup *cleanup = make_cleanup_ui_out_stream_delete (stb); |
| 8584 | |
| 8585 | gdb_assert (bl); |
| 8586 | |
| 8587 | address_start = bl->address; |
| 8588 | address_end = address_start + bl->length - 1; |
| 8589 | |
| 8590 | ui_out_text (uiout, "\taddress range: "); |
| 8591 | fprintf_unfiltered (stb->stream, "[%s, %s]", |
| 8592 | print_core_address (bl->gdbarch, address_start), |
| 8593 | print_core_address (bl->gdbarch, address_end)); |
| 8594 | ui_out_field_stream (uiout, "addr", stb); |
| 8595 | ui_out_text (uiout, "\n"); |
| 8596 | |
| 8597 | do_cleanups (cleanup); |
| 8598 | } |
| 8599 | |
| 8600 | /* Implement the "print_mention" breakpoint_ops method for |
| 8601 | ranged breakpoints. */ |
| 8602 | |
| 8603 | static void |
| 8604 | print_mention_ranged_breakpoint (struct breakpoint *b) |
| 8605 | { |
| 8606 | struct bp_location *bl = b->loc; |
| 8607 | |
| 8608 | gdb_assert (bl); |
| 8609 | gdb_assert (b->type == bp_hardware_breakpoint); |
| 8610 | |
| 8611 | if (ui_out_is_mi_like_p (uiout)) |
| 8612 | return; |
| 8613 | |
| 8614 | printf_filtered (_("Hardware assisted ranged breakpoint %d from %s to %s."), |
| 8615 | b->number, paddress (bl->gdbarch, bl->address), |
| 8616 | paddress (bl->gdbarch, bl->address + bl->length - 1)); |
| 8617 | } |
| 8618 | |
| 8619 | /* Implement the "print_recreate" breakpoint_ops method for |
| 8620 | ranged breakpoints. */ |
| 8621 | |
| 8622 | static void |
| 8623 | print_recreate_ranged_breakpoint (struct breakpoint *b, struct ui_file *fp) |
| 8624 | { |
| 8625 | fprintf_unfiltered (fp, "break-range %s, %s", b->addr_string, |
| 8626 | b->addr_string_range_end); |
| 8627 | } |
| 8628 | |
| 8629 | /* The breakpoint_ops structure to be used in ranged breakpoints. */ |
| 8630 | |
| 8631 | static struct breakpoint_ops ranged_breakpoint_ops = |
| 8632 | { |
| 8633 | NULL, /* dtor */ |
| 8634 | NULL, /* insert */ |
| 8635 | NULL, /* remove */ |
| 8636 | breakpoint_hit_ranged_breakpoint, |
| 8637 | resources_needed_ranged_breakpoint, |
| 8638 | NULL, /* works_in_software_mode */ |
| 8639 | print_it_ranged_breakpoint, |
| 8640 | print_one_ranged_breakpoint, |
| 8641 | print_one_detail_ranged_breakpoint, |
| 8642 | print_mention_ranged_breakpoint, |
| 8643 | print_recreate_ranged_breakpoint |
| 8644 | }; |
| 8645 | |
| 8646 | /* Find the address where the end of the breakpoint range should be |
| 8647 | placed, given the SAL of the end of the range. This is so that if |
| 8648 | the user provides a line number, the end of the range is set to the |
| 8649 | last instruction of the given line. */ |
| 8650 | |
| 8651 | static CORE_ADDR |
| 8652 | find_breakpoint_range_end (struct symtab_and_line sal) |
| 8653 | { |
| 8654 | CORE_ADDR end; |
| 8655 | |
| 8656 | /* If the user provided a PC value, use it. Otherwise, |
| 8657 | find the address of the end of the given location. */ |
| 8658 | if (sal.explicit_pc) |
| 8659 | end = sal.pc; |
| 8660 | else |
| 8661 | { |
| 8662 | int ret; |
| 8663 | CORE_ADDR start; |
| 8664 | |
| 8665 | ret = find_line_pc_range (sal, &start, &end); |
| 8666 | if (!ret) |
| 8667 | error (_("Could not find location of the end of the range.")); |
| 8668 | |
| 8669 | /* find_line_pc_range returns the start of the next line. */ |
| 8670 | end--; |
| 8671 | } |
| 8672 | |
| 8673 | return end; |
| 8674 | } |
| 8675 | |
| 8676 | /* Implement the "break-range" CLI command. */ |
| 8677 | |
| 8678 | static void |
| 8679 | break_range_command (char *arg, int from_tty) |
| 8680 | { |
| 8681 | char *arg_start, *addr_string_start, *addr_string_end; |
| 8682 | struct linespec_result canonical_start, canonical_end; |
| 8683 | int bp_count, can_use_bp, length; |
| 8684 | CORE_ADDR end; |
| 8685 | struct breakpoint *b; |
| 8686 | struct symtab_and_line sal_start, sal_end; |
| 8687 | struct symtabs_and_lines sals_start, sals_end; |
| 8688 | struct cleanup *cleanup_bkpt; |
| 8689 | |
| 8690 | /* We don't support software ranged breakpoints. */ |
| 8691 | if (target_ranged_break_num_registers () < 0) |
| 8692 | error (_("This target does not support hardware ranged breakpoints.")); |
| 8693 | |
| 8694 | bp_count = hw_breakpoint_used_count (); |
| 8695 | bp_count += target_ranged_break_num_registers (); |
| 8696 | can_use_bp = target_can_use_hardware_watchpoint (bp_hardware_breakpoint, |
| 8697 | bp_count, 0); |
| 8698 | if (can_use_bp < 0) |
| 8699 | error (_("Hardware breakpoints used exceeds limit.")); |
| 8700 | |
| 8701 | if (arg == NULL || arg[0] == '\0') |
| 8702 | error(_("No address range specified.")); |
| 8703 | |
| 8704 | sals_start.sals = NULL; |
| 8705 | sals_start.nelts = 0; |
| 8706 | init_linespec_result (&canonical_start); |
| 8707 | |
| 8708 | while (*arg == ' ' || *arg == '\t') |
| 8709 | arg++; |
| 8710 | |
| 8711 | parse_breakpoint_sals (&arg, &sals_start, &canonical_start); |
| 8712 | |
| 8713 | sal_start = sals_start.sals[0]; |
| 8714 | addr_string_start = canonical_start.canonical[0]; |
| 8715 | cleanup_bkpt = make_cleanup (xfree, addr_string_start); |
| 8716 | xfree (sals_start.sals); |
| 8717 | xfree (canonical_start.canonical); |
| 8718 | |
| 8719 | if (arg[0] != ',') |
| 8720 | error (_("Too few arguments.")); |
| 8721 | else if (sals_start.nelts == 0) |
| 8722 | error (_("Could not find location of the beginning of the range.")); |
| 8723 | else if (sals_start.nelts != 1) |
| 8724 | error (_("Cannot create a ranged breakpoint with multiple locations.")); |
| 8725 | |
| 8726 | resolve_sal_pc (&sal_start); |
| 8727 | |
| 8728 | arg++; /* Skip the comma. */ |
| 8729 | while (*arg == ' ' || *arg == '\t') |
| 8730 | arg++; |
| 8731 | |
| 8732 | /* Parse the end location. */ |
| 8733 | |
| 8734 | sals_end.sals = NULL; |
| 8735 | sals_end.nelts = 0; |
| 8736 | init_linespec_result (&canonical_end); |
| 8737 | arg_start = arg; |
| 8738 | |
| 8739 | /* We call decode_line_1 directly here instead of using |
| 8740 | parse_breakpoint_sals because we need to specify the start location's |
| 8741 | symtab and line as the default symtab and line for the end of the |
| 8742 | range. This makes it possible to have ranges like "foo.c:27, +14", |
| 8743 | where +14 means 14 lines from the start location. */ |
| 8744 | sals_end = decode_line_1 (&arg, 1, sal_start.symtab, sal_start.line, |
| 8745 | &canonical_end); |
| 8746 | |
| 8747 | /* canonical_end can be NULL if it was of the form "*0xdeadbeef". */ |
| 8748 | if (canonical_end.canonical == NULL) |
| 8749 | canonical_end.canonical = xcalloc (1, sizeof (char *)); |
| 8750 | /* Add the string if not present. */ |
| 8751 | if (arg_start != arg && canonical_end.canonical[0] == NULL) |
| 8752 | canonical_end.canonical[0] = savestring (arg_start, arg - arg_start); |
| 8753 | |
| 8754 | sal_end = sals_end.sals[0]; |
| 8755 | addr_string_end = canonical_end.canonical[0]; |
| 8756 | make_cleanup (xfree, addr_string_end); |
| 8757 | xfree (sals_end.sals); |
| 8758 | xfree (canonical_end.canonical); |
| 8759 | |
| 8760 | if (sals_end.nelts == 0) |
| 8761 | error (_("Could not find location of the end of the range.")); |
| 8762 | else if (sals_end.nelts != 1) |
| 8763 | error (_("Cannot create a ranged breakpoint with multiple locations.")); |
| 8764 | |
| 8765 | resolve_sal_pc (&sal_end); |
| 8766 | |
| 8767 | end = find_breakpoint_range_end (sal_end); |
| 8768 | if (sal_start.pc > end) |
| 8769 | error (_("Invalid address range, end preceeds start.")); |
| 8770 | |
| 8771 | length = end - sal_start.pc + 1; |
| 8772 | if (length < 0) |
| 8773 | /* Length overflowed. */ |
| 8774 | error (_("Address range too large.")); |
| 8775 | else if (length == 1) |
| 8776 | { |
| 8777 | /* This range is simple enough to be handled by |
| 8778 | the `hbreak' command. */ |
| 8779 | hbreak_command (addr_string_start, 1); |
| 8780 | |
| 8781 | do_cleanups (cleanup_bkpt); |
| 8782 | |
| 8783 | return; |
| 8784 | } |
| 8785 | |
| 8786 | /* Now set up the breakpoint. */ |
| 8787 | b = set_raw_breakpoint (get_current_arch (), sal_start, |
| 8788 | bp_hardware_breakpoint); |
| 8789 | set_breakpoint_count (breakpoint_count + 1); |
| 8790 | b->number = breakpoint_count; |
| 8791 | b->disposition = disp_donttouch; |
| 8792 | b->addr_string = addr_string_start; |
| 8793 | b->addr_string_range_end = addr_string_end; |
| 8794 | b->ops = &ranged_breakpoint_ops; |
| 8795 | b->loc->length = length; |
| 8796 | |
| 8797 | discard_cleanups (cleanup_bkpt); |
| 8798 | |
| 8799 | mention (b); |
| 8800 | observer_notify_breakpoint_created (b); |
| 8801 | update_global_location_list (1); |
| 8802 | } |
| 8803 | |
| 8804 | /* Return non-zero if EXP is verified as constant. Returned zero |
| 8805 | means EXP is variable. Also the constant detection may fail for |
| 8806 | some constant expressions and in such case still falsely return |
| 8807 | zero. */ |
| 8808 | static int |
| 8809 | watchpoint_exp_is_const (const struct expression *exp) |
| 8810 | { |
| 8811 | int i = exp->nelts; |
| 8812 | |
| 8813 | while (i > 0) |
| 8814 | { |
| 8815 | int oplenp, argsp; |
| 8816 | |
| 8817 | /* We are only interested in the descriptor of each element. */ |
| 8818 | operator_length (exp, i, &oplenp, &argsp); |
| 8819 | i -= oplenp; |
| 8820 | |
| 8821 | switch (exp->elts[i].opcode) |
| 8822 | { |
| 8823 | case BINOP_ADD: |
| 8824 | case BINOP_SUB: |
| 8825 | case BINOP_MUL: |
| 8826 | case BINOP_DIV: |
| 8827 | case BINOP_REM: |
| 8828 | case BINOP_MOD: |
| 8829 | case BINOP_LSH: |
| 8830 | case BINOP_RSH: |
| 8831 | case BINOP_LOGICAL_AND: |
| 8832 | case BINOP_LOGICAL_OR: |
| 8833 | case BINOP_BITWISE_AND: |
| 8834 | case BINOP_BITWISE_IOR: |
| 8835 | case BINOP_BITWISE_XOR: |
| 8836 | case BINOP_EQUAL: |
| 8837 | case BINOP_NOTEQUAL: |
| 8838 | case BINOP_LESS: |
| 8839 | case BINOP_GTR: |
| 8840 | case BINOP_LEQ: |
| 8841 | case BINOP_GEQ: |
| 8842 | case BINOP_REPEAT: |
| 8843 | case BINOP_COMMA: |
| 8844 | case BINOP_EXP: |
| 8845 | case BINOP_MIN: |
| 8846 | case BINOP_MAX: |
| 8847 | case BINOP_INTDIV: |
| 8848 | case BINOP_CONCAT: |
| 8849 | case BINOP_IN: |
| 8850 | case BINOP_RANGE: |
| 8851 | case TERNOP_COND: |
| 8852 | case TERNOP_SLICE: |
| 8853 | case TERNOP_SLICE_COUNT: |
| 8854 | |
| 8855 | case OP_LONG: |
| 8856 | case OP_DOUBLE: |
| 8857 | case OP_DECFLOAT: |
| 8858 | case OP_LAST: |
| 8859 | case OP_COMPLEX: |
| 8860 | case OP_STRING: |
| 8861 | case OP_BITSTRING: |
| 8862 | case OP_ARRAY: |
| 8863 | case OP_TYPE: |
| 8864 | case OP_NAME: |
| 8865 | case OP_OBJC_NSSTRING: |
| 8866 | |
| 8867 | case UNOP_NEG: |
| 8868 | case UNOP_LOGICAL_NOT: |
| 8869 | case UNOP_COMPLEMENT: |
| 8870 | case UNOP_ADDR: |
| 8871 | case UNOP_HIGH: |
| 8872 | /* Unary, binary and ternary operators: We have to check |
| 8873 | their operands. If they are constant, then so is the |
| 8874 | result of that operation. For instance, if A and B are |
| 8875 | determined to be constants, then so is "A + B". |
| 8876 | |
| 8877 | UNOP_IND is one exception to the rule above, because the |
| 8878 | value of *ADDR is not necessarily a constant, even when |
| 8879 | ADDR is. */ |
| 8880 | break; |
| 8881 | |
| 8882 | case OP_VAR_VALUE: |
| 8883 | /* Check whether the associated symbol is a constant. |
| 8884 | |
| 8885 | We use SYMBOL_CLASS rather than TYPE_CONST because it's |
| 8886 | possible that a buggy compiler could mark a variable as |
| 8887 | constant even when it is not, and TYPE_CONST would return |
| 8888 | true in this case, while SYMBOL_CLASS wouldn't. |
| 8889 | |
| 8890 | We also have to check for function symbols because they |
| 8891 | are always constant. */ |
| 8892 | { |
| 8893 | struct symbol *s = exp->elts[i + 2].symbol; |
| 8894 | |
| 8895 | if (SYMBOL_CLASS (s) != LOC_BLOCK |
| 8896 | && SYMBOL_CLASS (s) != LOC_CONST |
| 8897 | && SYMBOL_CLASS (s) != LOC_CONST_BYTES) |
| 8898 | return 0; |
| 8899 | break; |
| 8900 | } |
| 8901 | |
| 8902 | /* The default action is to return 0 because we are using |
| 8903 | the optimistic approach here: If we don't know something, |
| 8904 | then it is not a constant. */ |
| 8905 | default: |
| 8906 | return 0; |
| 8907 | } |
| 8908 | } |
| 8909 | |
| 8910 | return 1; |
| 8911 | } |
| 8912 | |
| 8913 | /* Implement the "insert" breakpoint_ops method for hardware watchpoints. */ |
| 8914 | |
| 8915 | static int |
| 8916 | insert_watchpoint (struct bp_location *bl) |
| 8917 | { |
| 8918 | int length = bl->owner->exact? 1 : bl->length; |
| 8919 | |
| 8920 | return target_insert_watchpoint (bl->address, length, bl->watchpoint_type, |
| 8921 | bl->owner->cond_exp); |
| 8922 | } |
| 8923 | |
| 8924 | /* Implement the "remove" breakpoint_ops method for hardware watchpoints. */ |
| 8925 | |
| 8926 | static int |
| 8927 | remove_watchpoint (struct bp_location *bl) |
| 8928 | { |
| 8929 | int length = bl->owner->exact? 1 : bl->length; |
| 8930 | |
| 8931 | return target_remove_watchpoint (bl->address, length, bl->watchpoint_type, |
| 8932 | bl->owner->cond_exp); |
| 8933 | } |
| 8934 | |
| 8935 | /* Implement the "resources_needed" breakpoint_ops method for |
| 8936 | hardware watchpoints. */ |
| 8937 | |
| 8938 | static int |
| 8939 | resources_needed_watchpoint (const struct bp_location *bl) |
| 8940 | { |
| 8941 | int length = bl->owner->exact? 1 : bl->length; |
| 8942 | |
| 8943 | return target_region_ok_for_hw_watchpoint (bl->address, length); |
| 8944 | } |
| 8945 | |
| 8946 | /* Implement the "works_in_software_mode" breakpoint_ops method for |
| 8947 | hardware watchpoints. */ |
| 8948 | |
| 8949 | int |
| 8950 | works_in_software_mode_watchpoint (const struct breakpoint *b) |
| 8951 | { |
| 8952 | return b->type == bp_hardware_watchpoint; |
| 8953 | } |
| 8954 | |
| 8955 | /* The breakpoint_ops structure to be used in hardware watchpoints. */ |
| 8956 | |
| 8957 | static struct breakpoint_ops watchpoint_breakpoint_ops = |
| 8958 | { |
| 8959 | NULL, /* dtor */ |
| 8960 | insert_watchpoint, |
| 8961 | remove_watchpoint, |
| 8962 | NULL, /* breakpoint_hit */ |
| 8963 | resources_needed_watchpoint, |
| 8964 | works_in_software_mode_watchpoint, |
| 8965 | NULL, /* print_it */ |
| 8966 | NULL, /* print_one */ |
| 8967 | NULL, /* print_one_detail */ |
| 8968 | NULL, /* print_mention */ |
| 8969 | NULL /* print_recreate */ |
| 8970 | }; |
| 8971 | |
| 8972 | /* Implement the "insert" breakpoint_ops method for |
| 8973 | masked hardware watchpoints. */ |
| 8974 | |
| 8975 | static int |
| 8976 | insert_masked_watchpoint (struct bp_location *bl) |
| 8977 | { |
| 8978 | return target_insert_mask_watchpoint (bl->address, bl->owner->hw_wp_mask, |
| 8979 | bl->watchpoint_type); |
| 8980 | } |
| 8981 | |
| 8982 | /* Implement the "remove" breakpoint_ops method for |
| 8983 | masked hardware watchpoints. */ |
| 8984 | |
| 8985 | static int |
| 8986 | remove_masked_watchpoint (struct bp_location *bl) |
| 8987 | { |
| 8988 | return target_remove_mask_watchpoint (bl->address, bl->owner->hw_wp_mask, |
| 8989 | bl->watchpoint_type); |
| 8990 | } |
| 8991 | |
| 8992 | /* Implement the "resources_needed" breakpoint_ops method for |
| 8993 | masked hardware watchpoints. */ |
| 8994 | |
| 8995 | static int |
| 8996 | resources_needed_masked_watchpoint (const struct bp_location *bl) |
| 8997 | { |
| 8998 | return target_masked_watch_num_registers (bl->address, |
| 8999 | bl->owner->hw_wp_mask); |
| 9000 | } |
| 9001 | |
| 9002 | /* Implement the "works_in_software_mode" breakpoint_ops method for |
| 9003 | masked hardware watchpoints. */ |
| 9004 | |
| 9005 | static int |
| 9006 | works_in_software_mode_masked_watchpoint (const struct breakpoint *b) |
| 9007 | { |
| 9008 | return 0; |
| 9009 | } |
| 9010 | |
| 9011 | /* Implement the "print_it" breakpoint_ops method for |
| 9012 | masked hardware watchpoints. */ |
| 9013 | |
| 9014 | static enum print_stop_action |
| 9015 | print_it_masked_watchpoint (struct breakpoint *b) |
| 9016 | { |
| 9017 | /* Masked watchpoints have only one location. */ |
| 9018 | gdb_assert (b->loc && b->loc->next == NULL); |
| 9019 | |
| 9020 | switch (b->type) |
| 9021 | { |
| 9022 | case bp_hardware_watchpoint: |
| 9023 | annotate_watchpoint (b->number); |
| 9024 | if (ui_out_is_mi_like_p (uiout)) |
| 9025 | ui_out_field_string |
| 9026 | (uiout, "reason", |
| 9027 | async_reason_lookup (EXEC_ASYNC_WATCHPOINT_TRIGGER)); |
| 9028 | break; |
| 9029 | |
| 9030 | case bp_read_watchpoint: |
| 9031 | if (ui_out_is_mi_like_p (uiout)) |
| 9032 | ui_out_field_string |
| 9033 | (uiout, "reason", |
| 9034 | async_reason_lookup (EXEC_ASYNC_READ_WATCHPOINT_TRIGGER)); |
| 9035 | break; |
| 9036 | |
| 9037 | case bp_access_watchpoint: |
| 9038 | if (ui_out_is_mi_like_p (uiout)) |
| 9039 | ui_out_field_string |
| 9040 | (uiout, "reason", |
| 9041 | async_reason_lookup (EXEC_ASYNC_ACCESS_WATCHPOINT_TRIGGER)); |
| 9042 | break; |
| 9043 | default: |
| 9044 | internal_error (__FILE__, __LINE__, |
| 9045 | _("Invalid hardware watchpoint type.")); |
| 9046 | } |
| 9047 | |
| 9048 | mention (b); |
| 9049 | ui_out_text (uiout, _("\n\ |
| 9050 | Check the underlying instruction at PC for the memory\n\ |
| 9051 | address and value which triggered this watchpoint.\n")); |
| 9052 | ui_out_text (uiout, "\n"); |
| 9053 | |
| 9054 | /* More than one watchpoint may have been triggered. */ |
| 9055 | return PRINT_UNKNOWN; |
| 9056 | } |
| 9057 | |
| 9058 | /* Implement the "print_one_detail" breakpoint_ops method for |
| 9059 | masked hardware watchpoints. */ |
| 9060 | |
| 9061 | static void |
| 9062 | print_one_detail_masked_watchpoint (const struct breakpoint *b, |
| 9063 | struct ui_out *uiout) |
| 9064 | { |
| 9065 | /* Masked watchpoints have only one location. */ |
| 9066 | gdb_assert (b->loc && b->loc->next == NULL); |
| 9067 | |
| 9068 | ui_out_text (uiout, "\tmask "); |
| 9069 | ui_out_field_core_addr (uiout, "mask", b->loc->gdbarch, b->hw_wp_mask); |
| 9070 | ui_out_text (uiout, "\n"); |
| 9071 | } |
| 9072 | |
| 9073 | /* Implement the "print_mention" breakpoint_ops method for |
| 9074 | masked hardware watchpoints. */ |
| 9075 | |
| 9076 | static void |
| 9077 | print_mention_masked_watchpoint (struct breakpoint *b) |
| 9078 | { |
| 9079 | struct cleanup *ui_out_chain; |
| 9080 | |
| 9081 | switch (b->type) |
| 9082 | { |
| 9083 | case bp_hardware_watchpoint: |
| 9084 | ui_out_text (uiout, "Masked hardware watchpoint "); |
| 9085 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt"); |
| 9086 | break; |
| 9087 | case bp_read_watchpoint: |
| 9088 | ui_out_text (uiout, "Masked hardware read watchpoint "); |
| 9089 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt"); |
| 9090 | break; |
| 9091 | case bp_access_watchpoint: |
| 9092 | ui_out_text (uiout, "Masked hardware access (read/write) watchpoint "); |
| 9093 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt"); |
| 9094 | break; |
| 9095 | default: |
| 9096 | internal_error (__FILE__, __LINE__, |
| 9097 | _("Invalid hardware watchpoint type.")); |
| 9098 | } |
| 9099 | |
| 9100 | ui_out_field_int (uiout, "number", b->number); |
| 9101 | ui_out_text (uiout, ": "); |
| 9102 | ui_out_field_string (uiout, "exp", b->exp_string); |
| 9103 | do_cleanups (ui_out_chain); |
| 9104 | } |
| 9105 | |
| 9106 | /* Implement the "print_recreate" breakpoint_ops method for |
| 9107 | masked hardware watchpoints. */ |
| 9108 | |
| 9109 | static void |
| 9110 | print_recreate_masked_watchpoint (struct breakpoint *b, struct ui_file *fp) |
| 9111 | { |
| 9112 | char tmp[40]; |
| 9113 | |
| 9114 | switch (b->type) |
| 9115 | { |
| 9116 | case bp_hardware_watchpoint: |
| 9117 | fprintf_unfiltered (fp, "watch"); |
| 9118 | break; |
| 9119 | case bp_read_watchpoint: |
| 9120 | fprintf_unfiltered (fp, "rwatch"); |
| 9121 | break; |
| 9122 | case bp_access_watchpoint: |
| 9123 | fprintf_unfiltered (fp, "awatch"); |
| 9124 | break; |
| 9125 | default: |
| 9126 | internal_error (__FILE__, __LINE__, |
| 9127 | _("Invalid hardware watchpoint type.")); |
| 9128 | } |
| 9129 | |
| 9130 | sprintf_vma (tmp, b->hw_wp_mask); |
| 9131 | fprintf_unfiltered (fp, " %s mask 0x%s", b->exp_string, tmp); |
| 9132 | } |
| 9133 | |
| 9134 | /* The breakpoint_ops structure to be used in masked hardware watchpoints. */ |
| 9135 | |
| 9136 | static struct breakpoint_ops masked_watchpoint_breakpoint_ops = |
| 9137 | { |
| 9138 | NULL, /* dtor */ |
| 9139 | insert_masked_watchpoint, |
| 9140 | remove_masked_watchpoint, |
| 9141 | NULL, /* breakpoint_hit */ |
| 9142 | resources_needed_masked_watchpoint, |
| 9143 | works_in_software_mode_masked_watchpoint, |
| 9144 | print_it_masked_watchpoint, |
| 9145 | NULL, /* print_one */ |
| 9146 | print_one_detail_masked_watchpoint, |
| 9147 | print_mention_masked_watchpoint, |
| 9148 | print_recreate_masked_watchpoint |
| 9149 | }; |
| 9150 | |
| 9151 | /* Tell whether the given watchpoint is a masked hardware watchpoint. */ |
| 9152 | |
| 9153 | static int |
| 9154 | is_masked_watchpoint (const struct breakpoint *b) |
| 9155 | { |
| 9156 | return b->ops == &masked_watchpoint_breakpoint_ops; |
| 9157 | } |
| 9158 | |
| 9159 | /* accessflag: hw_write: watch write, |
| 9160 | hw_read: watch read, |
| 9161 | hw_access: watch access (read or write) */ |
| 9162 | static void |
| 9163 | watch_command_1 (char *arg, int accessflag, int from_tty, |
| 9164 | int just_location, int internal) |
| 9165 | { |
| 9166 | volatile struct gdb_exception e; |
| 9167 | struct breakpoint *b, *scope_breakpoint = NULL; |
| 9168 | struct expression *exp; |
| 9169 | struct block *exp_valid_block = NULL, *cond_exp_valid_block = NULL; |
| 9170 | struct value *val, *mark, *result; |
| 9171 | struct frame_info *frame; |
| 9172 | char *exp_start = NULL; |
| 9173 | char *exp_end = NULL; |
| 9174 | char *tok, *end_tok; |
| 9175 | int toklen = -1; |
| 9176 | char *cond_start = NULL; |
| 9177 | char *cond_end = NULL; |
| 9178 | enum bptype bp_type; |
| 9179 | int thread = -1; |
| 9180 | int pc = 0; |
| 9181 | /* Flag to indicate whether we are going to use masks for |
| 9182 | the hardware watchpoint. */ |
| 9183 | int use_mask = 0; |
| 9184 | CORE_ADDR mask = 0; |
| 9185 | |
| 9186 | /* Make sure that we actually have parameters to parse. */ |
| 9187 | if (arg != NULL && arg[0] != '\0') |
| 9188 | { |
| 9189 | char *value_start; |
| 9190 | |
| 9191 | /* Look for "parameter value" pairs at the end |
| 9192 | of the arguments string. */ |
| 9193 | for (tok = arg + strlen (arg) - 1; tok > arg; tok--) |
| 9194 | { |
| 9195 | /* Skip whitespace at the end of the argument list. */ |
| 9196 | while (tok > arg && (*tok == ' ' || *tok == '\t')) |
| 9197 | tok--; |
| 9198 | |
| 9199 | /* Find the beginning of the last token. |
| 9200 | This is the value of the parameter. */ |
| 9201 | while (tok > arg && (*tok != ' ' && *tok != '\t')) |
| 9202 | tok--; |
| 9203 | value_start = tok + 1; |
| 9204 | |
| 9205 | /* Skip whitespace. */ |
| 9206 | while (tok > arg && (*tok == ' ' || *tok == '\t')) |
| 9207 | tok--; |
| 9208 | |
| 9209 | end_tok = tok; |
| 9210 | |
| 9211 | /* Find the beginning of the second to last token. |
| 9212 | This is the parameter itself. */ |
| 9213 | while (tok > arg && (*tok != ' ' && *tok != '\t')) |
| 9214 | tok--; |
| 9215 | tok++; |
| 9216 | toklen = end_tok - tok + 1; |
| 9217 | |
| 9218 | if (toklen == 6 && !strncmp (tok, "thread", 6)) |
| 9219 | { |
| 9220 | /* At this point we've found a "thread" token, which means |
| 9221 | the user is trying to set a watchpoint that triggers |
| 9222 | only in a specific thread. */ |
| 9223 | char *endp; |
| 9224 | |
| 9225 | if (thread != -1) |
| 9226 | error(_("You can specify only one thread.")); |
| 9227 | |
| 9228 | /* Extract the thread ID from the next token. */ |
| 9229 | thread = strtol (value_start, &endp, 0); |
| 9230 | |
| 9231 | /* Check if the user provided a valid numeric value for the |
| 9232 | thread ID. */ |
| 9233 | if (*endp != ' ' && *endp != '\t' && *endp != '\0') |
| 9234 | error (_("Invalid thread ID specification %s."), value_start); |
| 9235 | |
| 9236 | /* Check if the thread actually exists. */ |
| 9237 | if (!valid_thread_id (thread)) |
| 9238 | error (_("Unknown thread %d."), thread); |
| 9239 | } |
| 9240 | else if (toklen == 4 && !strncmp (tok, "mask", 4)) |
| 9241 | { |
| 9242 | /* We've found a "mask" token, which means the user wants to |
| 9243 | create a hardware watchpoint that is going to have the mask |
| 9244 | facility. */ |
| 9245 | struct value *mask_value, *mark; |
| 9246 | |
| 9247 | if (use_mask) |
| 9248 | error(_("You can specify only one mask.")); |
| 9249 | |
| 9250 | use_mask = just_location = 1; |
| 9251 | |
| 9252 | mark = value_mark (); |
| 9253 | mask_value = parse_to_comma_and_eval (&value_start); |
| 9254 | mask = value_as_address (mask_value); |
| 9255 | value_free_to_mark (mark); |
| 9256 | } |
| 9257 | else |
| 9258 | /* We didn't recognize what we found. We should stop here. */ |
| 9259 | break; |
| 9260 | |
| 9261 | /* Truncate the string and get rid of the "parameter value" pair before |
| 9262 | the arguments string is parsed by the parse_exp_1 function. */ |
| 9263 | *tok = '\0'; |
| 9264 | } |
| 9265 | } |
| 9266 | |
| 9267 | /* Parse the rest of the arguments. */ |
| 9268 | innermost_block = NULL; |
| 9269 | exp_start = arg; |
| 9270 | exp = parse_exp_1 (&arg, 0, 0); |
| 9271 | exp_end = arg; |
| 9272 | /* Remove trailing whitespace from the expression before saving it. |
| 9273 | This makes the eventual display of the expression string a bit |
| 9274 | prettier. */ |
| 9275 | while (exp_end > exp_start && (exp_end[-1] == ' ' || exp_end[-1] == '\t')) |
| 9276 | --exp_end; |
| 9277 | |
| 9278 | /* Checking if the expression is not constant. */ |
| 9279 | if (watchpoint_exp_is_const (exp)) |
| 9280 | { |
| 9281 | int len; |
| 9282 | |
| 9283 | len = exp_end - exp_start; |
| 9284 | while (len > 0 && isspace (exp_start[len - 1])) |
| 9285 | len--; |
| 9286 | error (_("Cannot watch constant value `%.*s'."), len, exp_start); |
| 9287 | } |
| 9288 | |
| 9289 | exp_valid_block = innermost_block; |
| 9290 | mark = value_mark (); |
| 9291 | fetch_subexp_value (exp, &pc, &val, &result, NULL); |
| 9292 | |
| 9293 | if (just_location) |
| 9294 | { |
| 9295 | int ret; |
| 9296 | |
| 9297 | exp_valid_block = NULL; |
| 9298 | val = value_addr (result); |
| 9299 | release_value (val); |
| 9300 | value_free_to_mark (mark); |
| 9301 | |
| 9302 | if (use_mask) |
| 9303 | { |
| 9304 | ret = target_masked_watch_num_registers (value_as_address (val), |
| 9305 | mask); |
| 9306 | if (ret == -1) |
| 9307 | error (_("This target does not support masked watchpoints.")); |
| 9308 | else if (ret == -2) |
| 9309 | error (_("Invalid mask or memory region.")); |
| 9310 | } |
| 9311 | } |
| 9312 | else if (val != NULL) |
| 9313 | release_value (val); |
| 9314 | |
| 9315 | tok = skip_spaces (arg); |
| 9316 | end_tok = skip_to_space (tok); |
| 9317 | |
| 9318 | toklen = end_tok - tok; |
| 9319 | if (toklen >= 1 && strncmp (tok, "if", toklen) == 0) |
| 9320 | { |
| 9321 | struct expression *cond; |
| 9322 | |
| 9323 | innermost_block = NULL; |
| 9324 | tok = cond_start = end_tok + 1; |
| 9325 | cond = parse_exp_1 (&tok, 0, 0); |
| 9326 | |
| 9327 | /* The watchpoint expression may not be local, but the condition |
| 9328 | may still be. E.g.: `watch global if local > 0'. */ |
| 9329 | cond_exp_valid_block = innermost_block; |
| 9330 | |
| 9331 | xfree (cond); |
| 9332 | cond_end = tok; |
| 9333 | } |
| 9334 | if (*tok) |
| 9335 | error (_("Junk at end of command.")); |
| 9336 | |
| 9337 | if (accessflag == hw_read) |
| 9338 | bp_type = bp_read_watchpoint; |
| 9339 | else if (accessflag == hw_access) |
| 9340 | bp_type = bp_access_watchpoint; |
| 9341 | else |
| 9342 | bp_type = bp_hardware_watchpoint; |
| 9343 | |
| 9344 | frame = block_innermost_frame (exp_valid_block); |
| 9345 | |
| 9346 | /* If the expression is "local", then set up a "watchpoint scope" |
| 9347 | breakpoint at the point where we've left the scope of the watchpoint |
| 9348 | expression. Create the scope breakpoint before the watchpoint, so |
| 9349 | that we will encounter it first in bpstat_stop_status. */ |
| 9350 | if (exp_valid_block && frame) |
| 9351 | { |
| 9352 | if (frame_id_p (frame_unwind_caller_id (frame))) |
| 9353 | { |
| 9354 | scope_breakpoint |
| 9355 | = create_internal_breakpoint (frame_unwind_caller_arch (frame), |
| 9356 | frame_unwind_caller_pc (frame), |
| 9357 | bp_watchpoint_scope); |
| 9358 | |
| 9359 | scope_breakpoint->enable_state = bp_enabled; |
| 9360 | |
| 9361 | /* Automatically delete the breakpoint when it hits. */ |
| 9362 | scope_breakpoint->disposition = disp_del; |
| 9363 | |
| 9364 | /* Only break in the proper frame (help with recursion). */ |
| 9365 | scope_breakpoint->frame_id = frame_unwind_caller_id (frame); |
| 9366 | |
| 9367 | /* Set the address at which we will stop. */ |
| 9368 | scope_breakpoint->loc->gdbarch |
| 9369 | = frame_unwind_caller_arch (frame); |
| 9370 | scope_breakpoint->loc->requested_address |
| 9371 | = frame_unwind_caller_pc (frame); |
| 9372 | scope_breakpoint->loc->address |
| 9373 | = adjust_breakpoint_address (scope_breakpoint->loc->gdbarch, |
| 9374 | scope_breakpoint->loc->requested_address, |
| 9375 | scope_breakpoint->type); |
| 9376 | } |
| 9377 | } |
| 9378 | |
| 9379 | /* Now set up the breakpoint. */ |
| 9380 | b = set_raw_breakpoint_without_location (NULL, bp_type); |
| 9381 | b->thread = thread; |
| 9382 | b->disposition = disp_donttouch; |
| 9383 | b->exp = exp; |
| 9384 | b->exp_valid_block = exp_valid_block; |
| 9385 | b->cond_exp_valid_block = cond_exp_valid_block; |
| 9386 | if (just_location) |
| 9387 | { |
| 9388 | struct type *t = value_type (val); |
| 9389 | CORE_ADDR addr = value_as_address (val); |
| 9390 | char *name; |
| 9391 | |
| 9392 | t = check_typedef (TYPE_TARGET_TYPE (check_typedef (t))); |
| 9393 | name = type_to_string (t); |
| 9394 | |
| 9395 | b->exp_string_reparse = xstrprintf ("* (%s *) %s", name, |
| 9396 | core_addr_to_string (addr)); |
| 9397 | xfree (name); |
| 9398 | |
| 9399 | b->exp_string = xstrprintf ("-location %.*s", |
| 9400 | (int) (exp_end - exp_start), exp_start); |
| 9401 | |
| 9402 | /* The above expression is in C. */ |
| 9403 | b->language = language_c; |
| 9404 | } |
| 9405 | else |
| 9406 | b->exp_string = savestring (exp_start, exp_end - exp_start); |
| 9407 | |
| 9408 | if (use_mask) |
| 9409 | { |
| 9410 | b->hw_wp_mask = mask; |
| 9411 | b->ops = &masked_watchpoint_breakpoint_ops; |
| 9412 | } |
| 9413 | else |
| 9414 | { |
| 9415 | b->val = val; |
| 9416 | b->val_valid = 1; |
| 9417 | b->ops = &watchpoint_breakpoint_ops; |
| 9418 | } |
| 9419 | |
| 9420 | if (cond_start) |
| 9421 | b->cond_string = savestring (cond_start, cond_end - cond_start); |
| 9422 | else |
| 9423 | b->cond_string = 0; |
| 9424 | |
| 9425 | if (frame) |
| 9426 | { |
| 9427 | b->watchpoint_frame = get_frame_id (frame); |
| 9428 | b->watchpoint_thread = inferior_ptid; |
| 9429 | } |
| 9430 | else |
| 9431 | { |
| 9432 | b->watchpoint_frame = null_frame_id; |
| 9433 | b->watchpoint_thread = null_ptid; |
| 9434 | } |
| 9435 | |
| 9436 | if (scope_breakpoint != NULL) |
| 9437 | { |
| 9438 | /* The scope breakpoint is related to the watchpoint. We will |
| 9439 | need to act on them together. */ |
| 9440 | b->related_breakpoint = scope_breakpoint; |
| 9441 | scope_breakpoint->related_breakpoint = b; |
| 9442 | } |
| 9443 | |
| 9444 | if (!just_location) |
| 9445 | value_free_to_mark (mark); |
| 9446 | |
| 9447 | TRY_CATCH (e, RETURN_MASK_ALL) |
| 9448 | { |
| 9449 | /* Finally update the new watchpoint. This creates the locations |
| 9450 | that should be inserted. */ |
| 9451 | update_watchpoint (b, 1); |
| 9452 | } |
| 9453 | if (e.reason < 0) |
| 9454 | { |
| 9455 | delete_breakpoint (b); |
| 9456 | throw_exception (e); |
| 9457 | } |
| 9458 | |
| 9459 | set_breakpoint_number (internal, b); |
| 9460 | |
| 9461 | /* Do not mention breakpoints with a negative number, but do |
| 9462 | notify observers. */ |
| 9463 | if (!internal) |
| 9464 | mention (b); |
| 9465 | observer_notify_breakpoint_created (b); |
| 9466 | |
| 9467 | update_global_location_list (1); |
| 9468 | } |
| 9469 | |
| 9470 | /* Return count of debug registers needed to watch the given expression. |
| 9471 | If the watchpoint cannot be handled in hardware return zero. */ |
| 9472 | |
| 9473 | static int |
| 9474 | can_use_hardware_watchpoint (struct value *v) |
| 9475 | { |
| 9476 | int found_memory_cnt = 0; |
| 9477 | struct value *head = v; |
| 9478 | |
| 9479 | /* Did the user specifically forbid us to use hardware watchpoints? */ |
| 9480 | if (!can_use_hw_watchpoints) |
| 9481 | return 0; |
| 9482 | |
| 9483 | /* Make sure that the value of the expression depends only upon |
| 9484 | memory contents, and values computed from them within GDB. If we |
| 9485 | find any register references or function calls, we can't use a |
| 9486 | hardware watchpoint. |
| 9487 | |
| 9488 | The idea here is that evaluating an expression generates a series |
| 9489 | of values, one holding the value of every subexpression. (The |
| 9490 | expression a*b+c has five subexpressions: a, b, a*b, c, and |
| 9491 | a*b+c.) GDB's values hold almost enough information to establish |
| 9492 | the criteria given above --- they identify memory lvalues, |
| 9493 | register lvalues, computed values, etcetera. So we can evaluate |
| 9494 | the expression, and then scan the chain of values that leaves |
| 9495 | behind to decide whether we can detect any possible change to the |
| 9496 | expression's final value using only hardware watchpoints. |
| 9497 | |
| 9498 | However, I don't think that the values returned by inferior |
| 9499 | function calls are special in any way. So this function may not |
| 9500 | notice that an expression involving an inferior function call |
| 9501 | can't be watched with hardware watchpoints. FIXME. */ |
| 9502 | for (; v; v = value_next (v)) |
| 9503 | { |
| 9504 | if (VALUE_LVAL (v) == lval_memory) |
| 9505 | { |
| 9506 | if (v != head && value_lazy (v)) |
| 9507 | /* A lazy memory lvalue in the chain is one that GDB never |
| 9508 | needed to fetch; we either just used its address (e.g., |
| 9509 | `a' in `a.b') or we never needed it at all (e.g., `a' |
| 9510 | in `a,b'). This doesn't apply to HEAD; if that is |
| 9511 | lazy then it was not readable, but watch it anyway. */ |
| 9512 | ; |
| 9513 | else |
| 9514 | { |
| 9515 | /* Ahh, memory we actually used! Check if we can cover |
| 9516 | it with hardware watchpoints. */ |
| 9517 | struct type *vtype = check_typedef (value_type (v)); |
| 9518 | |
| 9519 | /* We only watch structs and arrays if user asked for it |
| 9520 | explicitly, never if they just happen to appear in a |
| 9521 | middle of some value chain. */ |
| 9522 | if (v == head |
| 9523 | || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT |
| 9524 | && TYPE_CODE (vtype) != TYPE_CODE_ARRAY)) |
| 9525 | { |
| 9526 | CORE_ADDR vaddr = value_address (v); |
| 9527 | int len; |
| 9528 | int num_regs; |
| 9529 | |
| 9530 | len = (target_exact_watchpoints |
| 9531 | && is_scalar_type_recursive (vtype))? |
| 9532 | 1 : TYPE_LENGTH (value_type (v)); |
| 9533 | |
| 9534 | num_regs = target_region_ok_for_hw_watchpoint (vaddr, len); |
| 9535 | if (!num_regs) |
| 9536 | return 0; |
| 9537 | else |
| 9538 | found_memory_cnt += num_regs; |
| 9539 | } |
| 9540 | } |
| 9541 | } |
| 9542 | else if (VALUE_LVAL (v) != not_lval |
| 9543 | && deprecated_value_modifiable (v) == 0) |
| 9544 | return 0; /* These are values from the history (e.g., $1). */ |
| 9545 | else if (VALUE_LVAL (v) == lval_register) |
| 9546 | return 0; /* Cannot watch a register with a HW watchpoint. */ |
| 9547 | } |
| 9548 | |
| 9549 | /* The expression itself looks suitable for using a hardware |
| 9550 | watchpoint, but give the target machine a chance to reject it. */ |
| 9551 | return found_memory_cnt; |
| 9552 | } |
| 9553 | |
| 9554 | void |
| 9555 | watch_command_wrapper (char *arg, int from_tty, int internal) |
| 9556 | { |
| 9557 | watch_command_1 (arg, hw_write, from_tty, 0, internal); |
| 9558 | } |
| 9559 | |
| 9560 | /* A helper function that looks for an argument at the start of a |
| 9561 | string. The argument must also either be at the end of the string, |
| 9562 | or be followed by whitespace. Returns 1 if it finds the argument, |
| 9563 | 0 otherwise. If the argument is found, it updates *STR. */ |
| 9564 | |
| 9565 | static int |
| 9566 | check_for_argument (char **str, char *arg, int arg_len) |
| 9567 | { |
| 9568 | if (strncmp (*str, arg, arg_len) == 0 |
| 9569 | && ((*str)[arg_len] == '\0' || isspace ((*str)[arg_len]))) |
| 9570 | { |
| 9571 | *str += arg_len; |
| 9572 | return 1; |
| 9573 | } |
| 9574 | return 0; |
| 9575 | } |
| 9576 | |
| 9577 | /* A helper function that looks for the "-location" argument and then |
| 9578 | calls watch_command_1. */ |
| 9579 | |
| 9580 | static void |
| 9581 | watch_maybe_just_location (char *arg, int accessflag, int from_tty) |
| 9582 | { |
| 9583 | int just_location = 0; |
| 9584 | |
| 9585 | if (arg |
| 9586 | && (check_for_argument (&arg, "-location", sizeof ("-location") - 1) |
| 9587 | || check_for_argument (&arg, "-l", sizeof ("-l") - 1))) |
| 9588 | { |
| 9589 | arg = skip_spaces (arg); |
| 9590 | just_location = 1; |
| 9591 | } |
| 9592 | |
| 9593 | watch_command_1 (arg, accessflag, from_tty, just_location, 0); |
| 9594 | } |
| 9595 | |
| 9596 | static void |
| 9597 | watch_command (char *arg, int from_tty) |
| 9598 | { |
| 9599 | watch_maybe_just_location (arg, hw_write, from_tty); |
| 9600 | } |
| 9601 | |
| 9602 | void |
| 9603 | rwatch_command_wrapper (char *arg, int from_tty, int internal) |
| 9604 | { |
| 9605 | watch_command_1 (arg, hw_read, from_tty, 0, internal); |
| 9606 | } |
| 9607 | |
| 9608 | static void |
| 9609 | rwatch_command (char *arg, int from_tty) |
| 9610 | { |
| 9611 | watch_maybe_just_location (arg, hw_read, from_tty); |
| 9612 | } |
| 9613 | |
| 9614 | void |
| 9615 | awatch_command_wrapper (char *arg, int from_tty, int internal) |
| 9616 | { |
| 9617 | watch_command_1 (arg, hw_access, from_tty, 0, internal); |
| 9618 | } |
| 9619 | |
| 9620 | static void |
| 9621 | awatch_command (char *arg, int from_tty) |
| 9622 | { |
| 9623 | watch_maybe_just_location (arg, hw_access, from_tty); |
| 9624 | } |
| 9625 | \f |
| 9626 | |
| 9627 | /* Helper routines for the until_command routine in infcmd.c. Here |
| 9628 | because it uses the mechanisms of breakpoints. */ |
| 9629 | |
| 9630 | struct until_break_command_continuation_args |
| 9631 | { |
| 9632 | struct breakpoint *breakpoint; |
| 9633 | struct breakpoint *breakpoint2; |
| 9634 | int thread_num; |
| 9635 | }; |
| 9636 | |
| 9637 | /* This function is called by fetch_inferior_event via the |
| 9638 | cmd_continuation pointer, to complete the until command. It takes |
| 9639 | care of cleaning up the temporary breakpoints set up by the until |
| 9640 | command. */ |
| 9641 | static void |
| 9642 | until_break_command_continuation (void *arg, int err) |
| 9643 | { |
| 9644 | struct until_break_command_continuation_args *a = arg; |
| 9645 | |
| 9646 | delete_breakpoint (a->breakpoint); |
| 9647 | if (a->breakpoint2) |
| 9648 | delete_breakpoint (a->breakpoint2); |
| 9649 | delete_longjmp_breakpoint (a->thread_num); |
| 9650 | } |
| 9651 | |
| 9652 | void |
| 9653 | until_break_command (char *arg, int from_tty, int anywhere) |
| 9654 | { |
| 9655 | struct symtabs_and_lines sals; |
| 9656 | struct symtab_and_line sal; |
| 9657 | struct frame_info *frame = get_selected_frame (NULL); |
| 9658 | struct breakpoint *breakpoint; |
| 9659 | struct breakpoint *breakpoint2 = NULL; |
| 9660 | struct cleanup *old_chain; |
| 9661 | int thread; |
| 9662 | struct thread_info *tp; |
| 9663 | |
| 9664 | clear_proceed_status (); |
| 9665 | |
| 9666 | /* Set a breakpoint where the user wants it and at return from |
| 9667 | this function. */ |
| 9668 | |
| 9669 | if (default_breakpoint_valid) |
| 9670 | sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, |
| 9671 | default_breakpoint_line, NULL); |
| 9672 | else |
| 9673 | sals = decode_line_1 (&arg, 1, (struct symtab *) NULL, 0, NULL); |
| 9674 | |
| 9675 | if (sals.nelts != 1) |
| 9676 | error (_("Couldn't get information on specified line.")); |
| 9677 | |
| 9678 | sal = sals.sals[0]; |
| 9679 | xfree (sals.sals); /* malloc'd, so freed. */ |
| 9680 | |
| 9681 | if (*arg) |
| 9682 | error (_("Junk at end of arguments.")); |
| 9683 | |
| 9684 | resolve_sal_pc (&sal); |
| 9685 | |
| 9686 | if (anywhere) |
| 9687 | /* If the user told us to continue until a specified location, |
| 9688 | we don't specify a frame at which we need to stop. */ |
| 9689 | breakpoint = set_momentary_breakpoint (get_frame_arch (frame), sal, |
| 9690 | null_frame_id, bp_until); |
| 9691 | else |
| 9692 | /* Otherwise, specify the selected frame, because we want to stop |
| 9693 | only at the very same frame. */ |
| 9694 | breakpoint = set_momentary_breakpoint (get_frame_arch (frame), sal, |
| 9695 | get_stack_frame_id (frame), |
| 9696 | bp_until); |
| 9697 | |
| 9698 | old_chain = make_cleanup_delete_breakpoint (breakpoint); |
| 9699 | |
| 9700 | tp = inferior_thread (); |
| 9701 | thread = tp->num; |
| 9702 | |
| 9703 | /* Keep within the current frame, or in frames called by the current |
| 9704 | one. */ |
| 9705 | |
| 9706 | if (frame_id_p (frame_unwind_caller_id (frame))) |
| 9707 | { |
| 9708 | sal = find_pc_line (frame_unwind_caller_pc (frame), 0); |
| 9709 | sal.pc = frame_unwind_caller_pc (frame); |
| 9710 | breakpoint2 = set_momentary_breakpoint (frame_unwind_caller_arch (frame), |
| 9711 | sal, |
| 9712 | frame_unwind_caller_id (frame), |
| 9713 | bp_until); |
| 9714 | make_cleanup_delete_breakpoint (breakpoint2); |
| 9715 | |
| 9716 | set_longjmp_breakpoint (tp, frame_unwind_caller_id (frame)); |
| 9717 | make_cleanup (delete_longjmp_breakpoint_cleanup, &thread); |
| 9718 | } |
| 9719 | |
| 9720 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
| 9721 | |
| 9722 | /* If we are running asynchronously, and proceed call above has |
| 9723 | actually managed to start the target, arrange for breakpoints to |
| 9724 | be deleted when the target stops. Otherwise, we're already |
| 9725 | stopped and delete breakpoints via cleanup chain. */ |
| 9726 | |
| 9727 | if (target_can_async_p () && is_running (inferior_ptid)) |
| 9728 | { |
| 9729 | struct until_break_command_continuation_args *args; |
| 9730 | args = xmalloc (sizeof (*args)); |
| 9731 | |
| 9732 | args->breakpoint = breakpoint; |
| 9733 | args->breakpoint2 = breakpoint2; |
| 9734 | args->thread_num = thread; |
| 9735 | |
| 9736 | discard_cleanups (old_chain); |
| 9737 | add_continuation (inferior_thread (), |
| 9738 | until_break_command_continuation, args, |
| 9739 | xfree); |
| 9740 | } |
| 9741 | else |
| 9742 | do_cleanups (old_chain); |
| 9743 | } |
| 9744 | |
| 9745 | /* This function attempts to parse an optional "if <cond>" clause |
| 9746 | from the arg string. If one is not found, it returns NULL. |
| 9747 | |
| 9748 | Else, it returns a pointer to the condition string. (It does not |
| 9749 | attempt to evaluate the string against a particular block.) And, |
| 9750 | it updates arg to point to the first character following the parsed |
| 9751 | if clause in the arg string. */ |
| 9752 | |
| 9753 | static char * |
| 9754 | ep_parse_optional_if_clause (char **arg) |
| 9755 | { |
| 9756 | char *cond_string; |
| 9757 | |
| 9758 | if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2])) |
| 9759 | return NULL; |
| 9760 | |
| 9761 | /* Skip the "if" keyword. */ |
| 9762 | (*arg) += 2; |
| 9763 | |
| 9764 | /* Skip any extra leading whitespace, and record the start of the |
| 9765 | condition string. */ |
| 9766 | *arg = skip_spaces (*arg); |
| 9767 | cond_string = *arg; |
| 9768 | |
| 9769 | /* Assume that the condition occupies the remainder of the arg |
| 9770 | string. */ |
| 9771 | (*arg) += strlen (cond_string); |
| 9772 | |
| 9773 | return cond_string; |
| 9774 | } |
| 9775 | |
| 9776 | /* Commands to deal with catching events, such as signals, exceptions, |
| 9777 | process start/exit, etc. */ |
| 9778 | |
| 9779 | typedef enum |
| 9780 | { |
| 9781 | catch_fork_temporary, catch_vfork_temporary, |
| 9782 | catch_fork_permanent, catch_vfork_permanent |
| 9783 | } |
| 9784 | catch_fork_kind; |
| 9785 | |
| 9786 | static void |
| 9787 | catch_fork_command_1 (char *arg, int from_tty, |
| 9788 | struct cmd_list_element *command) |
| 9789 | { |
| 9790 | struct gdbarch *gdbarch = get_current_arch (); |
| 9791 | char *cond_string = NULL; |
| 9792 | catch_fork_kind fork_kind; |
| 9793 | int tempflag; |
| 9794 | |
| 9795 | fork_kind = (catch_fork_kind) (uintptr_t) get_cmd_context (command); |
| 9796 | tempflag = (fork_kind == catch_fork_temporary |
| 9797 | || fork_kind == catch_vfork_temporary); |
| 9798 | |
| 9799 | if (!arg) |
| 9800 | arg = ""; |
| 9801 | arg = skip_spaces (arg); |
| 9802 | |
| 9803 | /* The allowed syntax is: |
| 9804 | catch [v]fork |
| 9805 | catch [v]fork if <cond> |
| 9806 | |
| 9807 | First, check if there's an if clause. */ |
| 9808 | cond_string = ep_parse_optional_if_clause (&arg); |
| 9809 | |
| 9810 | if ((*arg != '\0') && !isspace (*arg)) |
| 9811 | error (_("Junk at end of arguments.")); |
| 9812 | |
| 9813 | /* If this target supports it, create a fork or vfork catchpoint |
| 9814 | and enable reporting of such events. */ |
| 9815 | switch (fork_kind) |
| 9816 | { |
| 9817 | case catch_fork_temporary: |
| 9818 | case catch_fork_permanent: |
| 9819 | create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string, |
| 9820 | &catch_fork_breakpoint_ops); |
| 9821 | break; |
| 9822 | case catch_vfork_temporary: |
| 9823 | case catch_vfork_permanent: |
| 9824 | create_fork_vfork_event_catchpoint (gdbarch, tempflag, cond_string, |
| 9825 | &catch_vfork_breakpoint_ops); |
| 9826 | break; |
| 9827 | default: |
| 9828 | error (_("unsupported or unknown fork kind; cannot catch it")); |
| 9829 | break; |
| 9830 | } |
| 9831 | } |
| 9832 | |
| 9833 | static void |
| 9834 | catch_exec_command_1 (char *arg, int from_tty, |
| 9835 | struct cmd_list_element *command) |
| 9836 | { |
| 9837 | struct gdbarch *gdbarch = get_current_arch (); |
| 9838 | int tempflag; |
| 9839 | char *cond_string = NULL; |
| 9840 | |
| 9841 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 9842 | |
| 9843 | if (!arg) |
| 9844 | arg = ""; |
| 9845 | arg = skip_spaces (arg); |
| 9846 | |
| 9847 | /* The allowed syntax is: |
| 9848 | catch exec |
| 9849 | catch exec if <cond> |
| 9850 | |
| 9851 | First, check if there's an if clause. */ |
| 9852 | cond_string = ep_parse_optional_if_clause (&arg); |
| 9853 | |
| 9854 | if ((*arg != '\0') && !isspace (*arg)) |
| 9855 | error (_("Junk at end of arguments.")); |
| 9856 | |
| 9857 | /* If this target supports it, create an exec catchpoint |
| 9858 | and enable reporting of such events. */ |
| 9859 | create_catchpoint (gdbarch, tempflag, cond_string, |
| 9860 | &catch_exec_breakpoint_ops); |
| 9861 | } |
| 9862 | |
| 9863 | static enum print_stop_action |
| 9864 | print_it_exception_catchpoint (struct breakpoint *b) |
| 9865 | { |
| 9866 | int bp_temp, bp_throw; |
| 9867 | |
| 9868 | annotate_catchpoint (b->number); |
| 9869 | |
| 9870 | bp_throw = strstr (b->addr_string, "throw") != NULL; |
| 9871 | if (b->loc->address != b->loc->requested_address) |
| 9872 | breakpoint_adjustment_warning (b->loc->requested_address, |
| 9873 | b->loc->address, |
| 9874 | b->number, 1); |
| 9875 | bp_temp = b->disposition == disp_del; |
| 9876 | ui_out_text (uiout, |
| 9877 | bp_temp ? "Temporary catchpoint " |
| 9878 | : "Catchpoint "); |
| 9879 | if (!ui_out_is_mi_like_p (uiout)) |
| 9880 | ui_out_field_int (uiout, "bkptno", b->number); |
| 9881 | ui_out_text (uiout, |
| 9882 | bp_throw ? " (exception thrown), " |
| 9883 | : " (exception caught), "); |
| 9884 | if (ui_out_is_mi_like_p (uiout)) |
| 9885 | { |
| 9886 | ui_out_field_string (uiout, "reason", |
| 9887 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
| 9888 | ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| 9889 | ui_out_field_int (uiout, "bkptno", b->number); |
| 9890 | } |
| 9891 | return PRINT_SRC_AND_LOC; |
| 9892 | } |
| 9893 | |
| 9894 | static void |
| 9895 | print_one_exception_catchpoint (struct breakpoint *b, |
| 9896 | struct bp_location **last_loc) |
| 9897 | { |
| 9898 | struct value_print_options opts; |
| 9899 | |
| 9900 | get_user_print_options (&opts); |
| 9901 | if (opts.addressprint) |
| 9902 | { |
| 9903 | annotate_field (4); |
| 9904 | if (b->loc == NULL || b->loc->shlib_disabled) |
| 9905 | ui_out_field_string (uiout, "addr", "<PENDING>"); |
| 9906 | else |
| 9907 | ui_out_field_core_addr (uiout, "addr", |
| 9908 | b->loc->gdbarch, b->loc->address); |
| 9909 | } |
| 9910 | annotate_field (5); |
| 9911 | if (b->loc) |
| 9912 | *last_loc = b->loc; |
| 9913 | if (strstr (b->addr_string, "throw") != NULL) |
| 9914 | ui_out_field_string (uiout, "what", "exception throw"); |
| 9915 | else |
| 9916 | ui_out_field_string (uiout, "what", "exception catch"); |
| 9917 | } |
| 9918 | |
| 9919 | static void |
| 9920 | print_mention_exception_catchpoint (struct breakpoint *b) |
| 9921 | { |
| 9922 | int bp_temp; |
| 9923 | int bp_throw; |
| 9924 | |
| 9925 | bp_temp = b->disposition == disp_del; |
| 9926 | bp_throw = strstr (b->addr_string, "throw") != NULL; |
| 9927 | ui_out_text (uiout, bp_temp ? _("Temporary catchpoint ") |
| 9928 | : _("Catchpoint ")); |
| 9929 | ui_out_field_int (uiout, "bkptno", b->number); |
| 9930 | ui_out_text (uiout, bp_throw ? _(" (throw)") |
| 9931 | : _(" (catch)")); |
| 9932 | } |
| 9933 | |
| 9934 | /* Implement the "print_recreate" breakpoint_ops method for throw and |
| 9935 | catch catchpoints. */ |
| 9936 | |
| 9937 | static void |
| 9938 | print_recreate_exception_catchpoint (struct breakpoint *b, |
| 9939 | struct ui_file *fp) |
| 9940 | { |
| 9941 | int bp_temp; |
| 9942 | int bp_throw; |
| 9943 | |
| 9944 | bp_temp = b->disposition == disp_del; |
| 9945 | bp_throw = strstr (b->addr_string, "throw") != NULL; |
| 9946 | fprintf_unfiltered (fp, bp_temp ? "tcatch " : "catch "); |
| 9947 | fprintf_unfiltered (fp, bp_throw ? "throw" : "catch"); |
| 9948 | } |
| 9949 | |
| 9950 | static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = { |
| 9951 | NULL, /* dtor */ |
| 9952 | NULL, /* insert */ |
| 9953 | NULL, /* remove */ |
| 9954 | NULL, /* breakpoint_hit */ |
| 9955 | NULL, /* resources_needed */ |
| 9956 | NULL, /* works_in_software_mode */ |
| 9957 | print_it_exception_catchpoint, |
| 9958 | print_one_exception_catchpoint, |
| 9959 | NULL, /* print_one_detail */ |
| 9960 | print_mention_exception_catchpoint, |
| 9961 | print_recreate_exception_catchpoint |
| 9962 | }; |
| 9963 | |
| 9964 | static int |
| 9965 | handle_gnu_v3_exceptions (int tempflag, char *cond_string, |
| 9966 | enum exception_event_kind ex_event, int from_tty) |
| 9967 | { |
| 9968 | char *trigger_func_name; |
| 9969 | |
| 9970 | if (ex_event == EX_EVENT_CATCH) |
| 9971 | trigger_func_name = "__cxa_begin_catch"; |
| 9972 | else |
| 9973 | trigger_func_name = "__cxa_throw"; |
| 9974 | |
| 9975 | create_breakpoint (get_current_arch (), |
| 9976 | trigger_func_name, cond_string, -1, |
| 9977 | 0 /* condition and thread are valid. */, |
| 9978 | tempflag, bp_breakpoint, |
| 9979 | 0, |
| 9980 | AUTO_BOOLEAN_TRUE /* pending */, |
| 9981 | &gnu_v3_exception_catchpoint_ops, from_tty, |
| 9982 | 1 /* enabled */, |
| 9983 | 0 /* internal */); |
| 9984 | |
| 9985 | return 1; |
| 9986 | } |
| 9987 | |
| 9988 | /* Deal with "catch catch" and "catch throw" commands. */ |
| 9989 | |
| 9990 | static void |
| 9991 | catch_exception_command_1 (enum exception_event_kind ex_event, char *arg, |
| 9992 | int tempflag, int from_tty) |
| 9993 | { |
| 9994 | char *cond_string = NULL; |
| 9995 | |
| 9996 | if (!arg) |
| 9997 | arg = ""; |
| 9998 | arg = skip_spaces (arg); |
| 9999 | |
| 10000 | cond_string = ep_parse_optional_if_clause (&arg); |
| 10001 | |
| 10002 | if ((*arg != '\0') && !isspace (*arg)) |
| 10003 | error (_("Junk at end of arguments.")); |
| 10004 | |
| 10005 | if (ex_event != EX_EVENT_THROW |
| 10006 | && ex_event != EX_EVENT_CATCH) |
| 10007 | error (_("Unsupported or unknown exception event; cannot catch it")); |
| 10008 | |
| 10009 | if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty)) |
| 10010 | return; |
| 10011 | |
| 10012 | warning (_("Unsupported with this platform/compiler combination.")); |
| 10013 | } |
| 10014 | |
| 10015 | /* Implementation of "catch catch" command. */ |
| 10016 | |
| 10017 | static void |
| 10018 | catch_catch_command (char *arg, int from_tty, struct cmd_list_element *command) |
| 10019 | { |
| 10020 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 10021 | |
| 10022 | catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty); |
| 10023 | } |
| 10024 | |
| 10025 | /* Implementation of "catch throw" command. */ |
| 10026 | |
| 10027 | static void |
| 10028 | catch_throw_command (char *arg, int from_tty, struct cmd_list_element *command) |
| 10029 | { |
| 10030 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 10031 | |
| 10032 | catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty); |
| 10033 | } |
| 10034 | |
| 10035 | /* Create a breakpoint struct for Ada exception catchpoints. */ |
| 10036 | |
| 10037 | static void |
| 10038 | create_ada_exception_breakpoint (struct gdbarch *gdbarch, |
| 10039 | struct symtab_and_line sal, |
| 10040 | char *addr_string, |
| 10041 | char *exp_string, |
| 10042 | char *cond_string, |
| 10043 | struct expression *cond, |
| 10044 | struct breakpoint_ops *ops, |
| 10045 | int tempflag, |
| 10046 | int from_tty) |
| 10047 | { |
| 10048 | struct breakpoint *b; |
| 10049 | |
| 10050 | if (from_tty) |
| 10051 | { |
| 10052 | struct gdbarch *loc_gdbarch = get_sal_arch (sal); |
| 10053 | if (!loc_gdbarch) |
| 10054 | loc_gdbarch = gdbarch; |
| 10055 | |
| 10056 | describe_other_breakpoints (loc_gdbarch, |
| 10057 | sal.pspace, sal.pc, sal.section, -1); |
| 10058 | /* FIXME: brobecker/2006-12-28: Actually, re-implement a special |
| 10059 | version for exception catchpoints, because two catchpoints |
| 10060 | used for different exception names will use the same address. |
| 10061 | In this case, a "breakpoint ... also set at..." warning is |
| 10062 | unproductive. Besides, the warning phrasing is also a bit |
| 10063 | inapropriate, we should use the word catchpoint, and tell |
| 10064 | the user what type of catchpoint it is. The above is good |
| 10065 | enough for now, though. */ |
| 10066 | } |
| 10067 | |
| 10068 | b = set_raw_breakpoint (gdbarch, sal, bp_breakpoint); |
| 10069 | set_breakpoint_count (breakpoint_count + 1); |
| 10070 | |
| 10071 | b->enable_state = bp_enabled; |
| 10072 | b->disposition = tempflag ? disp_del : disp_donttouch; |
| 10073 | b->number = breakpoint_count; |
| 10074 | b->ignore_count = 0; |
| 10075 | b->loc->cond = cond; |
| 10076 | b->addr_string = addr_string; |
| 10077 | b->language = language_ada; |
| 10078 | b->cond_string = cond_string; |
| 10079 | b->exp_string = exp_string; |
| 10080 | b->thread = -1; |
| 10081 | b->ops = ops; |
| 10082 | |
| 10083 | mention (b); |
| 10084 | observer_notify_breakpoint_created (b); |
| 10085 | update_global_location_list (1); |
| 10086 | } |
| 10087 | |
| 10088 | /* Implement the "catch exception" command. */ |
| 10089 | |
| 10090 | static void |
| 10091 | catch_ada_exception_command (char *arg, int from_tty, |
| 10092 | struct cmd_list_element *command) |
| 10093 | { |
| 10094 | struct gdbarch *gdbarch = get_current_arch (); |
| 10095 | int tempflag; |
| 10096 | struct symtab_and_line sal; |
| 10097 | char *addr_string = NULL; |
| 10098 | char *exp_string = NULL; |
| 10099 | char *cond_string = NULL; |
| 10100 | struct expression *cond = NULL; |
| 10101 | struct breakpoint_ops *ops = NULL; |
| 10102 | |
| 10103 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 10104 | |
| 10105 | if (!arg) |
| 10106 | arg = ""; |
| 10107 | sal = ada_decode_exception_location (arg, &addr_string, &exp_string, |
| 10108 | &cond_string, &cond, &ops); |
| 10109 | create_ada_exception_breakpoint (gdbarch, sal, addr_string, exp_string, |
| 10110 | cond_string, cond, ops, tempflag, |
| 10111 | from_tty); |
| 10112 | } |
| 10113 | |
| 10114 | /* Cleanup function for a syscall filter list. */ |
| 10115 | static void |
| 10116 | clean_up_filters (void *arg) |
| 10117 | { |
| 10118 | VEC(int) *iter = *(VEC(int) **) arg; |
| 10119 | VEC_free (int, iter); |
| 10120 | } |
| 10121 | |
| 10122 | /* Splits the argument using space as delimiter. Returns an xmalloc'd |
| 10123 | filter list, or NULL if no filtering is required. */ |
| 10124 | static VEC(int) * |
| 10125 | catch_syscall_split_args (char *arg) |
| 10126 | { |
| 10127 | VEC(int) *result = NULL; |
| 10128 | struct cleanup *cleanup = make_cleanup (clean_up_filters, &result); |
| 10129 | |
| 10130 | while (*arg != '\0') |
| 10131 | { |
| 10132 | int i, syscall_number; |
| 10133 | char *endptr; |
| 10134 | char cur_name[128]; |
| 10135 | struct syscall s; |
| 10136 | |
| 10137 | /* Skip whitespace. */ |
| 10138 | while (isspace (*arg)) |
| 10139 | arg++; |
| 10140 | |
| 10141 | for (i = 0; i < 127 && arg[i] && !isspace (arg[i]); ++i) |
| 10142 | cur_name[i] = arg[i]; |
| 10143 | cur_name[i] = '\0'; |
| 10144 | arg += i; |
| 10145 | |
| 10146 | /* Check if the user provided a syscall name or a number. */ |
| 10147 | syscall_number = (int) strtol (cur_name, &endptr, 0); |
| 10148 | if (*endptr == '\0') |
| 10149 | get_syscall_by_number (syscall_number, &s); |
| 10150 | else |
| 10151 | { |
| 10152 | /* We have a name. Let's check if it's valid and convert it |
| 10153 | to a number. */ |
| 10154 | get_syscall_by_name (cur_name, &s); |
| 10155 | |
| 10156 | if (s.number == UNKNOWN_SYSCALL) |
| 10157 | /* Here we have to issue an error instead of a warning, |
| 10158 | because GDB cannot do anything useful if there's no |
| 10159 | syscall number to be caught. */ |
| 10160 | error (_("Unknown syscall name '%s'."), cur_name); |
| 10161 | } |
| 10162 | |
| 10163 | /* Ok, it's valid. */ |
| 10164 | VEC_safe_push (int, result, s.number); |
| 10165 | } |
| 10166 | |
| 10167 | discard_cleanups (cleanup); |
| 10168 | return result; |
| 10169 | } |
| 10170 | |
| 10171 | /* Implement the "catch syscall" command. */ |
| 10172 | |
| 10173 | static void |
| 10174 | catch_syscall_command_1 (char *arg, int from_tty, |
| 10175 | struct cmd_list_element *command) |
| 10176 | { |
| 10177 | int tempflag; |
| 10178 | VEC(int) *filter; |
| 10179 | struct syscall s; |
| 10180 | struct gdbarch *gdbarch = get_current_arch (); |
| 10181 | |
| 10182 | /* Checking if the feature if supported. */ |
| 10183 | if (gdbarch_get_syscall_number_p (gdbarch) == 0) |
| 10184 | error (_("The feature 'catch syscall' is not supported on \ |
| 10185 | this architecture yet.")); |
| 10186 | |
| 10187 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 10188 | |
| 10189 | arg = skip_spaces (arg); |
| 10190 | |
| 10191 | /* We need to do this first "dummy" translation in order |
| 10192 | to get the syscall XML file loaded or, most important, |
| 10193 | to display a warning to the user if there's no XML file |
| 10194 | for his/her architecture. */ |
| 10195 | get_syscall_by_number (0, &s); |
| 10196 | |
| 10197 | /* The allowed syntax is: |
| 10198 | catch syscall |
| 10199 | catch syscall <name | number> [<name | number> ... <name | number>] |
| 10200 | |
| 10201 | Let's check if there's a syscall name. */ |
| 10202 | |
| 10203 | if (arg != NULL) |
| 10204 | filter = catch_syscall_split_args (arg); |
| 10205 | else |
| 10206 | filter = NULL; |
| 10207 | |
| 10208 | create_syscall_event_catchpoint (tempflag, filter, |
| 10209 | &catch_syscall_breakpoint_ops); |
| 10210 | } |
| 10211 | |
| 10212 | /* Implement the "catch assert" command. */ |
| 10213 | |
| 10214 | static void |
| 10215 | catch_assert_command (char *arg, int from_tty, |
| 10216 | struct cmd_list_element *command) |
| 10217 | { |
| 10218 | struct gdbarch *gdbarch = get_current_arch (); |
| 10219 | int tempflag; |
| 10220 | struct symtab_and_line sal; |
| 10221 | char *addr_string = NULL; |
| 10222 | struct breakpoint_ops *ops = NULL; |
| 10223 | |
| 10224 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 10225 | |
| 10226 | if (!arg) |
| 10227 | arg = ""; |
| 10228 | sal = ada_decode_assert_location (arg, &addr_string, &ops); |
| 10229 | create_ada_exception_breakpoint (gdbarch, sal, addr_string, NULL, NULL, NULL, |
| 10230 | ops, tempflag, from_tty); |
| 10231 | } |
| 10232 | |
| 10233 | static void |
| 10234 | catch_command (char *arg, int from_tty) |
| 10235 | { |
| 10236 | error (_("Catch requires an event name.")); |
| 10237 | } |
| 10238 | \f |
| 10239 | |
| 10240 | static void |
| 10241 | tcatch_command (char *arg, int from_tty) |
| 10242 | { |
| 10243 | error (_("Catch requires an event name.")); |
| 10244 | } |
| 10245 | |
| 10246 | /* Delete breakpoints by address or line. */ |
| 10247 | |
| 10248 | static void |
| 10249 | clear_command (char *arg, int from_tty) |
| 10250 | { |
| 10251 | struct breakpoint *b; |
| 10252 | VEC(breakpoint_p) *found = 0; |
| 10253 | int ix; |
| 10254 | int default_match; |
| 10255 | struct symtabs_and_lines sals; |
| 10256 | struct symtab_and_line sal; |
| 10257 | int i; |
| 10258 | |
| 10259 | if (arg) |
| 10260 | { |
| 10261 | sals = decode_line_spec (arg, 1); |
| 10262 | default_match = 0; |
| 10263 | } |
| 10264 | else |
| 10265 | { |
| 10266 | sals.sals = (struct symtab_and_line *) |
| 10267 | xmalloc (sizeof (struct symtab_and_line)); |
| 10268 | make_cleanup (xfree, sals.sals); |
| 10269 | init_sal (&sal); /* Initialize to zeroes. */ |
| 10270 | sal.line = default_breakpoint_line; |
| 10271 | sal.symtab = default_breakpoint_symtab; |
| 10272 | sal.pc = default_breakpoint_address; |
| 10273 | sal.pspace = default_breakpoint_pspace; |
| 10274 | if (sal.symtab == 0) |
| 10275 | error (_("No source file specified.")); |
| 10276 | |
| 10277 | sals.sals[0] = sal; |
| 10278 | sals.nelts = 1; |
| 10279 | |
| 10280 | default_match = 1; |
| 10281 | } |
| 10282 | |
| 10283 | /* We don't call resolve_sal_pc here. That's not as bad as it |
| 10284 | seems, because all existing breakpoints typically have both |
| 10285 | file/line and pc set. So, if clear is given file/line, we can |
| 10286 | match this to existing breakpoint without obtaining pc at all. |
| 10287 | |
| 10288 | We only support clearing given the address explicitly |
| 10289 | present in breakpoint table. Say, we've set breakpoint |
| 10290 | at file:line. There were several PC values for that file:line, |
| 10291 | due to optimization, all in one block. |
| 10292 | |
| 10293 | We've picked one PC value. If "clear" is issued with another |
| 10294 | PC corresponding to the same file:line, the breakpoint won't |
| 10295 | be cleared. We probably can still clear the breakpoint, but |
| 10296 | since the other PC value is never presented to user, user |
| 10297 | can only find it by guessing, and it does not seem important |
| 10298 | to support that. */ |
| 10299 | |
| 10300 | /* For each line spec given, delete bps which correspond to it. Do |
| 10301 | it in two passes, solely to preserve the current behavior that |
| 10302 | from_tty is forced true if we delete more than one |
| 10303 | breakpoint. */ |
| 10304 | |
| 10305 | found = NULL; |
| 10306 | for (i = 0; i < sals.nelts; i++) |
| 10307 | { |
| 10308 | /* If exact pc given, clear bpts at that pc. |
| 10309 | If line given (pc == 0), clear all bpts on specified line. |
| 10310 | If defaulting, clear all bpts on default line |
| 10311 | or at default pc. |
| 10312 | |
| 10313 | defaulting sal.pc != 0 tests to do |
| 10314 | |
| 10315 | 0 1 pc |
| 10316 | 1 1 pc _and_ line |
| 10317 | 0 0 line |
| 10318 | 1 0 <can't happen> */ |
| 10319 | |
| 10320 | sal = sals.sals[i]; |
| 10321 | |
| 10322 | /* Find all matching breakpoints and add them to 'found'. */ |
| 10323 | ALL_BREAKPOINTS (b) |
| 10324 | { |
| 10325 | int match = 0; |
| 10326 | /* Are we going to delete b? */ |
| 10327 | if (b->type != bp_none && !is_watchpoint (b)) |
| 10328 | { |
| 10329 | struct bp_location *loc = b->loc; |
| 10330 | for (; loc; loc = loc->next) |
| 10331 | { |
| 10332 | int pc_match = sal.pc |
| 10333 | && (loc->pspace == sal.pspace) |
| 10334 | && (loc->address == sal.pc) |
| 10335 | && (!section_is_overlay (loc->section) |
| 10336 | || loc->section == sal.section); |
| 10337 | int line_match = ((default_match || (0 == sal.pc)) |
| 10338 | && b->source_file != NULL |
| 10339 | && sal.symtab != NULL |
| 10340 | && sal.pspace == loc->pspace |
| 10341 | && filename_cmp (b->source_file, |
| 10342 | sal.symtab->filename) == 0 |
| 10343 | && b->line_number == sal.line); |
| 10344 | if (pc_match || line_match) |
| 10345 | { |
| 10346 | match = 1; |
| 10347 | break; |
| 10348 | } |
| 10349 | } |
| 10350 | } |
| 10351 | |
| 10352 | if (match) |
| 10353 | VEC_safe_push(breakpoint_p, found, b); |
| 10354 | } |
| 10355 | } |
| 10356 | /* Now go thru the 'found' chain and delete them. */ |
| 10357 | if (VEC_empty(breakpoint_p, found)) |
| 10358 | { |
| 10359 | if (arg) |
| 10360 | error (_("No breakpoint at %s."), arg); |
| 10361 | else |
| 10362 | error (_("No breakpoint at this line.")); |
| 10363 | } |
| 10364 | |
| 10365 | if (VEC_length(breakpoint_p, found) > 1) |
| 10366 | from_tty = 1; /* Always report if deleted more than one. */ |
| 10367 | if (from_tty) |
| 10368 | { |
| 10369 | if (VEC_length(breakpoint_p, found) == 1) |
| 10370 | printf_unfiltered (_("Deleted breakpoint ")); |
| 10371 | else |
| 10372 | printf_unfiltered (_("Deleted breakpoints ")); |
| 10373 | } |
| 10374 | breakpoints_changed (); |
| 10375 | |
| 10376 | for (ix = 0; VEC_iterate(breakpoint_p, found, ix, b); ix++) |
| 10377 | { |
| 10378 | if (from_tty) |
| 10379 | printf_unfiltered ("%d ", b->number); |
| 10380 | delete_breakpoint (b); |
| 10381 | } |
| 10382 | if (from_tty) |
| 10383 | putchar_unfiltered ('\n'); |
| 10384 | } |
| 10385 | \f |
| 10386 | /* Delete breakpoint in BS if they are `delete' breakpoints and |
| 10387 | all breakpoints that are marked for deletion, whether hit or not. |
| 10388 | This is called after any breakpoint is hit, or after errors. */ |
| 10389 | |
| 10390 | void |
| 10391 | breakpoint_auto_delete (bpstat bs) |
| 10392 | { |
| 10393 | struct breakpoint *b, *b_tmp; |
| 10394 | |
| 10395 | for (; bs; bs = bs->next) |
| 10396 | if (bs->breakpoint_at |
| 10397 | && bs->breakpoint_at->disposition == disp_del |
| 10398 | && bs->stop) |
| 10399 | delete_breakpoint (bs->breakpoint_at); |
| 10400 | |
| 10401 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 10402 | { |
| 10403 | if (b->disposition == disp_del_at_next_stop) |
| 10404 | delete_breakpoint (b); |
| 10405 | } |
| 10406 | } |
| 10407 | |
| 10408 | /* A comparison function for bp_location AP and BP being interfaced to |
| 10409 | qsort. Sort elements primarily by their ADDRESS (no matter what |
| 10410 | does breakpoint_address_is_meaningful say for its OWNER), |
| 10411 | secondarily by ordering first bp_permanent OWNERed elements and |
| 10412 | terciarily just ensuring the array is sorted stable way despite |
| 10413 | qsort being an instable algorithm. */ |
| 10414 | |
| 10415 | static int |
| 10416 | bp_location_compare (const void *ap, const void *bp) |
| 10417 | { |
| 10418 | struct bp_location *a = *(void **) ap; |
| 10419 | struct bp_location *b = *(void **) bp; |
| 10420 | /* A and B come from existing breakpoints having non-NULL OWNER. */ |
| 10421 | int a_perm = a->owner->enable_state == bp_permanent; |
| 10422 | int b_perm = b->owner->enable_state == bp_permanent; |
| 10423 | |
| 10424 | if (a->address != b->address) |
| 10425 | return (a->address > b->address) - (a->address < b->address); |
| 10426 | |
| 10427 | /* Sort permanent breakpoints first. */ |
| 10428 | if (a_perm != b_perm) |
| 10429 | return (a_perm < b_perm) - (a_perm > b_perm); |
| 10430 | |
| 10431 | /* Make the user-visible order stable across GDB runs. Locations of |
| 10432 | the same breakpoint can be sorted in arbitrary order. */ |
| 10433 | |
| 10434 | if (a->owner->number != b->owner->number) |
| 10435 | return (a->owner->number > b->owner->number) |
| 10436 | - (a->owner->number < b->owner->number); |
| 10437 | |
| 10438 | return (a > b) - (a < b); |
| 10439 | } |
| 10440 | |
| 10441 | /* Set bp_location_placed_address_before_address_max and |
| 10442 | bp_location_shadow_len_after_address_max according to the current |
| 10443 | content of the bp_location array. */ |
| 10444 | |
| 10445 | static void |
| 10446 | bp_location_target_extensions_update (void) |
| 10447 | { |
| 10448 | struct bp_location *bl, **blp_tmp; |
| 10449 | |
| 10450 | bp_location_placed_address_before_address_max = 0; |
| 10451 | bp_location_shadow_len_after_address_max = 0; |
| 10452 | |
| 10453 | ALL_BP_LOCATIONS (bl, blp_tmp) |
| 10454 | { |
| 10455 | CORE_ADDR start, end, addr; |
| 10456 | |
| 10457 | if (!bp_location_has_shadow (bl)) |
| 10458 | continue; |
| 10459 | |
| 10460 | start = bl->target_info.placed_address; |
| 10461 | end = start + bl->target_info.shadow_len; |
| 10462 | |
| 10463 | gdb_assert (bl->address >= start); |
| 10464 | addr = bl->address - start; |
| 10465 | if (addr > bp_location_placed_address_before_address_max) |
| 10466 | bp_location_placed_address_before_address_max = addr; |
| 10467 | |
| 10468 | /* Zero SHADOW_LEN would not pass bp_location_has_shadow. */ |
| 10469 | |
| 10470 | gdb_assert (bl->address < end); |
| 10471 | addr = end - bl->address; |
| 10472 | if (addr > bp_location_shadow_len_after_address_max) |
| 10473 | bp_location_shadow_len_after_address_max = addr; |
| 10474 | } |
| 10475 | } |
| 10476 | |
| 10477 | /* If SHOULD_INSERT is false, do not insert any breakpoint locations |
| 10478 | into the inferior, only remove already-inserted locations that no |
| 10479 | longer should be inserted. Functions that delete a breakpoint or |
| 10480 | breakpoints should pass false, so that deleting a breakpoint |
| 10481 | doesn't have the side effect of inserting the locations of other |
| 10482 | breakpoints that are marked not-inserted, but should_be_inserted |
| 10483 | returns true on them. |
| 10484 | |
| 10485 | This behaviour is useful is situations close to tear-down -- e.g., |
| 10486 | after an exec, while the target still has execution, but breakpoint |
| 10487 | shadows of the previous executable image should *NOT* be restored |
| 10488 | to the new image; or before detaching, where the target still has |
| 10489 | execution and wants to delete breakpoints from GDB's lists, and all |
| 10490 | breakpoints had already been removed from the inferior. */ |
| 10491 | |
| 10492 | static void |
| 10493 | update_global_location_list (int should_insert) |
| 10494 | { |
| 10495 | struct breakpoint *b; |
| 10496 | struct bp_location **locp, *loc; |
| 10497 | struct cleanup *cleanups; |
| 10498 | |
| 10499 | /* Used in the duplicates detection below. When iterating over all |
| 10500 | bp_locations, points to the first bp_location of a given address. |
| 10501 | Breakpoints and watchpoints of different types are never |
| 10502 | duplicates of each other. Keep one pointer for each type of |
| 10503 | breakpoint/watchpoint, so we only need to loop over all locations |
| 10504 | once. */ |
| 10505 | struct bp_location *bp_loc_first; /* breakpoint */ |
| 10506 | struct bp_location *wp_loc_first; /* hardware watchpoint */ |
| 10507 | struct bp_location *awp_loc_first; /* access watchpoint */ |
| 10508 | struct bp_location *rwp_loc_first; /* read watchpoint */ |
| 10509 | |
| 10510 | /* Saved former bp_location array which we compare against the newly |
| 10511 | built bp_location from the current state of ALL_BREAKPOINTS. */ |
| 10512 | struct bp_location **old_location, **old_locp; |
| 10513 | unsigned old_location_count; |
| 10514 | |
| 10515 | old_location = bp_location; |
| 10516 | old_location_count = bp_location_count; |
| 10517 | bp_location = NULL; |
| 10518 | bp_location_count = 0; |
| 10519 | cleanups = make_cleanup (xfree, old_location); |
| 10520 | |
| 10521 | ALL_BREAKPOINTS (b) |
| 10522 | for (loc = b->loc; loc; loc = loc->next) |
| 10523 | bp_location_count++; |
| 10524 | |
| 10525 | bp_location = xmalloc (sizeof (*bp_location) * bp_location_count); |
| 10526 | locp = bp_location; |
| 10527 | ALL_BREAKPOINTS (b) |
| 10528 | for (loc = b->loc; loc; loc = loc->next) |
| 10529 | *locp++ = loc; |
| 10530 | qsort (bp_location, bp_location_count, sizeof (*bp_location), |
| 10531 | bp_location_compare); |
| 10532 | |
| 10533 | bp_location_target_extensions_update (); |
| 10534 | |
| 10535 | /* Identify bp_location instances that are no longer present in the |
| 10536 | new list, and therefore should be freed. Note that it's not |
| 10537 | necessary that those locations should be removed from inferior -- |
| 10538 | if there's another location at the same address (previously |
| 10539 | marked as duplicate), we don't need to remove/insert the |
| 10540 | location. |
| 10541 | |
| 10542 | LOCP is kept in sync with OLD_LOCP, each pointing to the current |
| 10543 | and former bp_location array state respectively. */ |
| 10544 | |
| 10545 | locp = bp_location; |
| 10546 | for (old_locp = old_location; old_locp < old_location + old_location_count; |
| 10547 | old_locp++) |
| 10548 | { |
| 10549 | struct bp_location *old_loc = *old_locp; |
| 10550 | struct bp_location **loc2p; |
| 10551 | |
| 10552 | /* Tells if 'old_loc' is found amoung the new locations. If |
| 10553 | not, we have to free it. */ |
| 10554 | int found_object = 0; |
| 10555 | /* Tells if the location should remain inserted in the target. */ |
| 10556 | int keep_in_target = 0; |
| 10557 | int removed = 0; |
| 10558 | |
| 10559 | /* Skip LOCP entries which will definitely never be needed. |
| 10560 | Stop either at or being the one matching OLD_LOC. */ |
| 10561 | while (locp < bp_location + bp_location_count |
| 10562 | && (*locp)->address < old_loc->address) |
| 10563 | locp++; |
| 10564 | |
| 10565 | for (loc2p = locp; |
| 10566 | (loc2p < bp_location + bp_location_count |
| 10567 | && (*loc2p)->address == old_loc->address); |
| 10568 | loc2p++) |
| 10569 | { |
| 10570 | if (*loc2p == old_loc) |
| 10571 | { |
| 10572 | found_object = 1; |
| 10573 | break; |
| 10574 | } |
| 10575 | } |
| 10576 | |
| 10577 | /* If this location is no longer present, and inserted, look if |
| 10578 | there's maybe a new location at the same address. If so, |
| 10579 | mark that one inserted, and don't remove this one. This is |
| 10580 | needed so that we don't have a time window where a breakpoint |
| 10581 | at certain location is not inserted. */ |
| 10582 | |
| 10583 | if (old_loc->inserted) |
| 10584 | { |
| 10585 | /* If the location is inserted now, we might have to remove |
| 10586 | it. */ |
| 10587 | |
| 10588 | if (found_object && should_be_inserted (old_loc)) |
| 10589 | { |
| 10590 | /* The location is still present in the location list, |
| 10591 | and still should be inserted. Don't do anything. */ |
| 10592 | keep_in_target = 1; |
| 10593 | } |
| 10594 | else |
| 10595 | { |
| 10596 | /* The location is either no longer present, or got |
| 10597 | disabled. See if there's another location at the |
| 10598 | same address, in which case we don't need to remove |
| 10599 | this one from the target. */ |
| 10600 | |
| 10601 | /* OLD_LOC comes from existing struct breakpoint. */ |
| 10602 | if (breakpoint_address_is_meaningful (old_loc->owner)) |
| 10603 | { |
| 10604 | for (loc2p = locp; |
| 10605 | (loc2p < bp_location + bp_location_count |
| 10606 | && (*loc2p)->address == old_loc->address); |
| 10607 | loc2p++) |
| 10608 | { |
| 10609 | struct bp_location *loc2 = *loc2p; |
| 10610 | |
| 10611 | if (breakpoint_locations_match (loc2, old_loc)) |
| 10612 | { |
| 10613 | /* For the sake of should_be_inserted. |
| 10614 | Duplicates check below will fix up this |
| 10615 | later. */ |
| 10616 | loc2->duplicate = 0; |
| 10617 | |
| 10618 | /* Read watchpoint locations are switched to |
| 10619 | access watchpoints, if the former are not |
| 10620 | supported, but the latter are. */ |
| 10621 | if (is_hardware_watchpoint (old_loc->owner)) |
| 10622 | { |
| 10623 | gdb_assert (is_hardware_watchpoint (loc2->owner)); |
| 10624 | loc2->watchpoint_type = old_loc->watchpoint_type; |
| 10625 | } |
| 10626 | |
| 10627 | if (loc2 != old_loc && should_be_inserted (loc2)) |
| 10628 | { |
| 10629 | loc2->inserted = 1; |
| 10630 | loc2->target_info = old_loc->target_info; |
| 10631 | keep_in_target = 1; |
| 10632 | break; |
| 10633 | } |
| 10634 | } |
| 10635 | } |
| 10636 | } |
| 10637 | } |
| 10638 | |
| 10639 | if (!keep_in_target) |
| 10640 | { |
| 10641 | if (remove_breakpoint (old_loc, mark_uninserted)) |
| 10642 | { |
| 10643 | /* This is just about all we can do. We could keep |
| 10644 | this location on the global list, and try to |
| 10645 | remove it next time, but there's no particular |
| 10646 | reason why we will succeed next time. |
| 10647 | |
| 10648 | Note that at this point, old_loc->owner is still |
| 10649 | valid, as delete_breakpoint frees the breakpoint |
| 10650 | only after calling us. */ |
| 10651 | printf_filtered (_("warning: Error removing " |
| 10652 | "breakpoint %d\n"), |
| 10653 | old_loc->owner->number); |
| 10654 | } |
| 10655 | removed = 1; |
| 10656 | } |
| 10657 | } |
| 10658 | |
| 10659 | if (!found_object) |
| 10660 | { |
| 10661 | if (removed && non_stop |
| 10662 | && breakpoint_address_is_meaningful (old_loc->owner) |
| 10663 | && !is_hardware_watchpoint (old_loc->owner)) |
| 10664 | { |
| 10665 | /* This location was removed from the target. In |
| 10666 | non-stop mode, a race condition is possible where |
| 10667 | we've removed a breakpoint, but stop events for that |
| 10668 | breakpoint are already queued and will arrive later. |
| 10669 | We apply an heuristic to be able to distinguish such |
| 10670 | SIGTRAPs from other random SIGTRAPs: we keep this |
| 10671 | breakpoint location for a bit, and will retire it |
| 10672 | after we see some number of events. The theory here |
| 10673 | is that reporting of events should, "on the average", |
| 10674 | be fair, so after a while we'll see events from all |
| 10675 | threads that have anything of interest, and no longer |
| 10676 | need to keep this breakpoint location around. We |
| 10677 | don't hold locations forever so to reduce chances of |
| 10678 | mistaking a non-breakpoint SIGTRAP for a breakpoint |
| 10679 | SIGTRAP. |
| 10680 | |
| 10681 | The heuristic failing can be disastrous on |
| 10682 | decr_pc_after_break targets. |
| 10683 | |
| 10684 | On decr_pc_after_break targets, like e.g., x86-linux, |
| 10685 | if we fail to recognize a late breakpoint SIGTRAP, |
| 10686 | because events_till_retirement has reached 0 too |
| 10687 | soon, we'll fail to do the PC adjustment, and report |
| 10688 | a random SIGTRAP to the user. When the user resumes |
| 10689 | the inferior, it will most likely immediately crash |
| 10690 | with SIGILL/SIGBUS/SIGSEGV, or worse, get silently |
| 10691 | corrupted, because of being resumed e.g., in the |
| 10692 | middle of a multi-byte instruction, or skipped a |
| 10693 | one-byte instruction. This was actually seen happen |
| 10694 | on native x86-linux, and should be less rare on |
| 10695 | targets that do not support new thread events, like |
| 10696 | remote, due to the heuristic depending on |
| 10697 | thread_count. |
| 10698 | |
| 10699 | Mistaking a random SIGTRAP for a breakpoint trap |
| 10700 | causes similar symptoms (PC adjustment applied when |
| 10701 | it shouldn't), but then again, playing with SIGTRAPs |
| 10702 | behind the debugger's back is asking for trouble. |
| 10703 | |
| 10704 | Since hardware watchpoint traps are always |
| 10705 | distinguishable from other traps, so we don't need to |
| 10706 | apply keep hardware watchpoint moribund locations |
| 10707 | around. We simply always ignore hardware watchpoint |
| 10708 | traps we can no longer explain. */ |
| 10709 | |
| 10710 | old_loc->events_till_retirement = 3 * (thread_count () + 1); |
| 10711 | old_loc->owner = NULL; |
| 10712 | |
| 10713 | VEC_safe_push (bp_location_p, moribund_locations, old_loc); |
| 10714 | } |
| 10715 | else |
| 10716 | { |
| 10717 | old_loc->owner = NULL; |
| 10718 | decref_bp_location (&old_loc); |
| 10719 | } |
| 10720 | } |
| 10721 | } |
| 10722 | |
| 10723 | /* Rescan breakpoints at the same address and section, marking the |
| 10724 | first one as "first" and any others as "duplicates". This is so |
| 10725 | that the bpt instruction is only inserted once. If we have a |
| 10726 | permanent breakpoint at the same place as BPT, make that one the |
| 10727 | official one, and the rest as duplicates. Permanent breakpoints |
| 10728 | are sorted first for the same address. |
| 10729 | |
| 10730 | Do the same for hardware watchpoints, but also considering the |
| 10731 | watchpoint's type (regular/access/read) and length. */ |
| 10732 | |
| 10733 | bp_loc_first = NULL; |
| 10734 | wp_loc_first = NULL; |
| 10735 | awp_loc_first = NULL; |
| 10736 | rwp_loc_first = NULL; |
| 10737 | ALL_BP_LOCATIONS (loc, locp) |
| 10738 | { |
| 10739 | /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always |
| 10740 | non-NULL. */ |
| 10741 | struct breakpoint *b = loc->owner; |
| 10742 | struct bp_location **loc_first_p; |
| 10743 | |
| 10744 | if (b->enable_state == bp_disabled |
| 10745 | || b->enable_state == bp_call_disabled |
| 10746 | || b->enable_state == bp_startup_disabled |
| 10747 | || !loc->enabled |
| 10748 | || loc->shlib_disabled |
| 10749 | || !breakpoint_address_is_meaningful (b) |
| 10750 | || is_tracepoint (b)) |
| 10751 | continue; |
| 10752 | |
| 10753 | /* Permanent breakpoint should always be inserted. */ |
| 10754 | if (b->enable_state == bp_permanent && ! loc->inserted) |
| 10755 | internal_error (__FILE__, __LINE__, |
| 10756 | _("allegedly permanent breakpoint is not " |
| 10757 | "actually inserted")); |
| 10758 | |
| 10759 | if (b->type == bp_hardware_watchpoint) |
| 10760 | loc_first_p = &wp_loc_first; |
| 10761 | else if (b->type == bp_read_watchpoint) |
| 10762 | loc_first_p = &rwp_loc_first; |
| 10763 | else if (b->type == bp_access_watchpoint) |
| 10764 | loc_first_p = &awp_loc_first; |
| 10765 | else |
| 10766 | loc_first_p = &bp_loc_first; |
| 10767 | |
| 10768 | if (*loc_first_p == NULL |
| 10769 | || (overlay_debugging && loc->section != (*loc_first_p)->section) |
| 10770 | || !breakpoint_locations_match (loc, *loc_first_p)) |
| 10771 | { |
| 10772 | *loc_first_p = loc; |
| 10773 | loc->duplicate = 0; |
| 10774 | continue; |
| 10775 | } |
| 10776 | |
| 10777 | loc->duplicate = 1; |
| 10778 | |
| 10779 | if ((*loc_first_p)->owner->enable_state == bp_permanent && loc->inserted |
| 10780 | && b->enable_state != bp_permanent) |
| 10781 | internal_error (__FILE__, __LINE__, |
| 10782 | _("another breakpoint was inserted on top of " |
| 10783 | "a permanent breakpoint")); |
| 10784 | } |
| 10785 | |
| 10786 | if (breakpoints_always_inserted_mode () && should_insert |
| 10787 | && (have_live_inferiors () |
| 10788 | || (gdbarch_has_global_breakpoints (target_gdbarch)))) |
| 10789 | insert_breakpoint_locations (); |
| 10790 | |
| 10791 | do_cleanups (cleanups); |
| 10792 | } |
| 10793 | |
| 10794 | void |
| 10795 | breakpoint_retire_moribund (void) |
| 10796 | { |
| 10797 | struct bp_location *loc; |
| 10798 | int ix; |
| 10799 | |
| 10800 | for (ix = 0; VEC_iterate (bp_location_p, moribund_locations, ix, loc); ++ix) |
| 10801 | if (--(loc->events_till_retirement) == 0) |
| 10802 | { |
| 10803 | decref_bp_location (&loc); |
| 10804 | VEC_unordered_remove (bp_location_p, moribund_locations, ix); |
| 10805 | --ix; |
| 10806 | } |
| 10807 | } |
| 10808 | |
| 10809 | static void |
| 10810 | update_global_location_list_nothrow (int inserting) |
| 10811 | { |
| 10812 | struct gdb_exception e; |
| 10813 | |
| 10814 | TRY_CATCH (e, RETURN_MASK_ERROR) |
| 10815 | update_global_location_list (inserting); |
| 10816 | } |
| 10817 | |
| 10818 | /* Clear BKP from a BPS. */ |
| 10819 | |
| 10820 | static void |
| 10821 | bpstat_remove_bp_location (bpstat bps, struct breakpoint *bpt) |
| 10822 | { |
| 10823 | bpstat bs; |
| 10824 | |
| 10825 | for (bs = bps; bs; bs = bs->next) |
| 10826 | if (bs->breakpoint_at == bpt) |
| 10827 | { |
| 10828 | bs->breakpoint_at = NULL; |
| 10829 | bs->old_val = NULL; |
| 10830 | /* bs->commands will be freed later. */ |
| 10831 | } |
| 10832 | } |
| 10833 | |
| 10834 | /* Callback for iterate_over_threads. */ |
| 10835 | static int |
| 10836 | bpstat_remove_breakpoint_callback (struct thread_info *th, void *data) |
| 10837 | { |
| 10838 | struct breakpoint *bpt = data; |
| 10839 | |
| 10840 | bpstat_remove_bp_location (th->control.stop_bpstat, bpt); |
| 10841 | return 0; |
| 10842 | } |
| 10843 | |
| 10844 | /* Delete a breakpoint and clean up all traces of it in the data |
| 10845 | structures. */ |
| 10846 | |
| 10847 | void |
| 10848 | delete_breakpoint (struct breakpoint *bpt) |
| 10849 | { |
| 10850 | struct breakpoint *b; |
| 10851 | |
| 10852 | gdb_assert (bpt != NULL); |
| 10853 | |
| 10854 | /* Has this bp already been deleted? This can happen because |
| 10855 | multiple lists can hold pointers to bp's. bpstat lists are |
| 10856 | especial culprits. |
| 10857 | |
| 10858 | One example of this happening is a watchpoint's scope bp. When |
| 10859 | the scope bp triggers, we notice that the watchpoint is out of |
| 10860 | scope, and delete it. We also delete its scope bp. But the |
| 10861 | scope bp is marked "auto-deleting", and is already on a bpstat. |
| 10862 | That bpstat is then checked for auto-deleting bp's, which are |
| 10863 | deleted. |
| 10864 | |
| 10865 | A real solution to this problem might involve reference counts in |
| 10866 | bp's, and/or giving them pointers back to their referencing |
| 10867 | bpstat's, and teaching delete_breakpoint to only free a bp's |
| 10868 | storage when no more references were extent. A cheaper bandaid |
| 10869 | was chosen. */ |
| 10870 | if (bpt->type == bp_none) |
| 10871 | return; |
| 10872 | |
| 10873 | /* At least avoid this stale reference until the reference counting |
| 10874 | of breakpoints gets resolved. */ |
| 10875 | if (bpt->related_breakpoint != bpt) |
| 10876 | { |
| 10877 | struct breakpoint *related; |
| 10878 | |
| 10879 | if (bpt->type == bp_watchpoint_scope) |
| 10880 | watchpoint_del_at_next_stop (bpt->related_breakpoint); |
| 10881 | else if (bpt->related_breakpoint->type == bp_watchpoint_scope) |
| 10882 | watchpoint_del_at_next_stop (bpt); |
| 10883 | |
| 10884 | /* Unlink bpt from the bpt->related_breakpoint ring. */ |
| 10885 | for (related = bpt; related->related_breakpoint != bpt; |
| 10886 | related = related->related_breakpoint); |
| 10887 | related->related_breakpoint = bpt->related_breakpoint; |
| 10888 | bpt->related_breakpoint = bpt; |
| 10889 | } |
| 10890 | |
| 10891 | /* watch_command_1 creates a watchpoint but only sets its number if |
| 10892 | update_watchpoint succeeds in creating its bp_locations. If there's |
| 10893 | a problem in that process, we'll be asked to delete the half-created |
| 10894 | watchpoint. In that case, don't announce the deletion. */ |
| 10895 | if (bpt->number) |
| 10896 | observer_notify_breakpoint_deleted (bpt); |
| 10897 | |
| 10898 | if (breakpoint_chain == bpt) |
| 10899 | breakpoint_chain = bpt->next; |
| 10900 | |
| 10901 | ALL_BREAKPOINTS (b) |
| 10902 | if (b->next == bpt) |
| 10903 | { |
| 10904 | b->next = bpt->next; |
| 10905 | break; |
| 10906 | } |
| 10907 | |
| 10908 | if (bpt->ops != NULL && bpt->ops->dtor != NULL) |
| 10909 | bpt->ops->dtor (bpt); |
| 10910 | |
| 10911 | decref_counted_command_line (&bpt->commands); |
| 10912 | xfree (bpt->cond_string); |
| 10913 | xfree (bpt->cond_exp); |
| 10914 | xfree (bpt->addr_string); |
| 10915 | xfree (bpt->addr_string_range_end); |
| 10916 | xfree (bpt->exp); |
| 10917 | xfree (bpt->exp_string); |
| 10918 | xfree (bpt->exp_string_reparse); |
| 10919 | value_free (bpt->val); |
| 10920 | xfree (bpt->source_file); |
| 10921 | xfree (bpt->exec_pathname); |
| 10922 | |
| 10923 | |
| 10924 | /* Be sure no bpstat's are pointing at the breakpoint after it's |
| 10925 | been freed. */ |
| 10926 | /* FIXME, how can we find all bpstat's? We just check stop_bpstat |
| 10927 | in all threeds for now. Note that we cannot just remove bpstats |
| 10928 | pointing at bpt from the stop_bpstat list entirely, as breakpoint |
| 10929 | commands are associated with the bpstat; if we remove it here, |
| 10930 | then the later call to bpstat_do_actions (&stop_bpstat); in |
| 10931 | event-top.c won't do anything, and temporary breakpoints with |
| 10932 | commands won't work. */ |
| 10933 | |
| 10934 | iterate_over_threads (bpstat_remove_breakpoint_callback, bpt); |
| 10935 | |
| 10936 | /* Now that breakpoint is removed from breakpoint list, update the |
| 10937 | global location list. This will remove locations that used to |
| 10938 | belong to this breakpoint. Do this before freeing the breakpoint |
| 10939 | itself, since remove_breakpoint looks at location's owner. It |
| 10940 | might be better design to have location completely |
| 10941 | self-contained, but it's not the case now. */ |
| 10942 | update_global_location_list (0); |
| 10943 | |
| 10944 | |
| 10945 | /* On the chance that someone will soon try again to delete this |
| 10946 | same bp, we mark it as deleted before freeing its storage. */ |
| 10947 | bpt->type = bp_none; |
| 10948 | |
| 10949 | xfree (bpt); |
| 10950 | } |
| 10951 | |
| 10952 | static void |
| 10953 | do_delete_breakpoint_cleanup (void *b) |
| 10954 | { |
| 10955 | delete_breakpoint (b); |
| 10956 | } |
| 10957 | |
| 10958 | struct cleanup * |
| 10959 | make_cleanup_delete_breakpoint (struct breakpoint *b) |
| 10960 | { |
| 10961 | return make_cleanup (do_delete_breakpoint_cleanup, b); |
| 10962 | } |
| 10963 | |
| 10964 | /* Iterator function to call a user-provided callback function once |
| 10965 | for each of B and its related breakpoints. */ |
| 10966 | |
| 10967 | static void |
| 10968 | iterate_over_related_breakpoints (struct breakpoint *b, |
| 10969 | void (*function) (struct breakpoint *, |
| 10970 | void *), |
| 10971 | void *data) |
| 10972 | { |
| 10973 | struct breakpoint *related; |
| 10974 | |
| 10975 | related = b; |
| 10976 | do |
| 10977 | { |
| 10978 | struct breakpoint *next; |
| 10979 | |
| 10980 | /* FUNCTION may delete RELATED. */ |
| 10981 | next = related->related_breakpoint; |
| 10982 | |
| 10983 | if (next == related) |
| 10984 | { |
| 10985 | /* RELATED is the last ring entry. */ |
| 10986 | function (related, data); |
| 10987 | |
| 10988 | /* FUNCTION may have deleted it, so we'd never reach back to |
| 10989 | B. There's nothing left to do anyway, so just break |
| 10990 | out. */ |
| 10991 | break; |
| 10992 | } |
| 10993 | else |
| 10994 | function (related, data); |
| 10995 | |
| 10996 | related = next; |
| 10997 | } |
| 10998 | while (related != b); |
| 10999 | } |
| 11000 | |
| 11001 | static void |
| 11002 | do_delete_breakpoint (struct breakpoint *b, void *ignore) |
| 11003 | { |
| 11004 | delete_breakpoint (b); |
| 11005 | } |
| 11006 | |
| 11007 | /* A callback for map_breakpoint_numbers that calls |
| 11008 | delete_breakpoint. */ |
| 11009 | |
| 11010 | static void |
| 11011 | do_map_delete_breakpoint (struct breakpoint *b, void *ignore) |
| 11012 | { |
| 11013 | iterate_over_related_breakpoints (b, do_delete_breakpoint, NULL); |
| 11014 | } |
| 11015 | |
| 11016 | void |
| 11017 | delete_command (char *arg, int from_tty) |
| 11018 | { |
| 11019 | struct breakpoint *b, *b_tmp; |
| 11020 | |
| 11021 | dont_repeat (); |
| 11022 | |
| 11023 | if (arg == 0) |
| 11024 | { |
| 11025 | int breaks_to_delete = 0; |
| 11026 | |
| 11027 | /* Delete all breakpoints if no argument. Do not delete |
| 11028 | internal breakpoints, these have to be deleted with an |
| 11029 | explicit breakpoint number argument. */ |
| 11030 | ALL_BREAKPOINTS (b) |
| 11031 | if (user_breakpoint_p (b)) |
| 11032 | { |
| 11033 | breaks_to_delete = 1; |
| 11034 | break; |
| 11035 | } |
| 11036 | |
| 11037 | /* Ask user only if there are some breakpoints to delete. */ |
| 11038 | if (!from_tty |
| 11039 | || (breaks_to_delete && query (_("Delete all breakpoints? ")))) |
| 11040 | { |
| 11041 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 11042 | if (user_breakpoint_p (b)) |
| 11043 | delete_breakpoint (b); |
| 11044 | } |
| 11045 | } |
| 11046 | else |
| 11047 | map_breakpoint_numbers (arg, do_map_delete_breakpoint, NULL); |
| 11048 | } |
| 11049 | |
| 11050 | static int |
| 11051 | all_locations_are_pending (struct bp_location *loc) |
| 11052 | { |
| 11053 | for (; loc; loc = loc->next) |
| 11054 | if (!loc->shlib_disabled) |
| 11055 | return 0; |
| 11056 | return 1; |
| 11057 | } |
| 11058 | |
| 11059 | /* Subroutine of update_breakpoint_locations to simplify it. |
| 11060 | Return non-zero if multiple fns in list LOC have the same name. |
| 11061 | Null names are ignored. */ |
| 11062 | |
| 11063 | static int |
| 11064 | ambiguous_names_p (struct bp_location *loc) |
| 11065 | { |
| 11066 | struct bp_location *l; |
| 11067 | htab_t htab = htab_create_alloc (13, htab_hash_string, |
| 11068 | (int (*) (const void *, |
| 11069 | const void *)) streq, |
| 11070 | NULL, xcalloc, xfree); |
| 11071 | |
| 11072 | for (l = loc; l != NULL; l = l->next) |
| 11073 | { |
| 11074 | const char **slot; |
| 11075 | const char *name = l->function_name; |
| 11076 | |
| 11077 | /* Allow for some names to be NULL, ignore them. */ |
| 11078 | if (name == NULL) |
| 11079 | continue; |
| 11080 | |
| 11081 | slot = (const char **) htab_find_slot (htab, (const void *) name, |
| 11082 | INSERT); |
| 11083 | /* NOTE: We can assume slot != NULL here because xcalloc never |
| 11084 | returns NULL. */ |
| 11085 | if (*slot != NULL) |
| 11086 | { |
| 11087 | htab_delete (htab); |
| 11088 | return 1; |
| 11089 | } |
| 11090 | *slot = name; |
| 11091 | } |
| 11092 | |
| 11093 | htab_delete (htab); |
| 11094 | return 0; |
| 11095 | } |
| 11096 | |
| 11097 | /* When symbols change, it probably means the sources changed as well, |
| 11098 | and it might mean the static tracepoint markers are no longer at |
| 11099 | the same address or line numbers they used to be at last we |
| 11100 | checked. Losing your static tracepoints whenever you rebuild is |
| 11101 | undesirable. This function tries to resync/rematch gdb static |
| 11102 | tracepoints with the markers on the target, for static tracepoints |
| 11103 | that have not been set by marker id. Static tracepoint that have |
| 11104 | been set by marker id are reset by marker id in breakpoint_re_set. |
| 11105 | The heuristic is: |
| 11106 | |
| 11107 | 1) For a tracepoint set at a specific address, look for a marker at |
| 11108 | the old PC. If one is found there, assume to be the same marker. |
| 11109 | If the name / string id of the marker found is different from the |
| 11110 | previous known name, assume that means the user renamed the marker |
| 11111 | in the sources, and output a warning. |
| 11112 | |
| 11113 | 2) For a tracepoint set at a given line number, look for a marker |
| 11114 | at the new address of the old line number. If one is found there, |
| 11115 | assume to be the same marker. If the name / string id of the |
| 11116 | marker found is different from the previous known name, assume that |
| 11117 | means the user renamed the marker in the sources, and output a |
| 11118 | warning. |
| 11119 | |
| 11120 | 3) If a marker is no longer found at the same address or line, it |
| 11121 | may mean the marker no longer exists. But it may also just mean |
| 11122 | the code changed a bit. Maybe the user added a few lines of code |
| 11123 | that made the marker move up or down (in line number terms). Ask |
| 11124 | the target for info about the marker with the string id as we knew |
| 11125 | it. If found, update line number and address in the matching |
| 11126 | static tracepoint. This will get confused if there's more than one |
| 11127 | marker with the same ID (possible in UST, although unadvised |
| 11128 | precisely because it confuses tools). */ |
| 11129 | |
| 11130 | static struct symtab_and_line |
| 11131 | update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal) |
| 11132 | { |
| 11133 | struct static_tracepoint_marker marker; |
| 11134 | CORE_ADDR pc; |
| 11135 | int i; |
| 11136 | |
| 11137 | pc = sal.pc; |
| 11138 | if (sal.line) |
| 11139 | find_line_pc (sal.symtab, sal.line, &pc); |
| 11140 | |
| 11141 | if (target_static_tracepoint_marker_at (pc, &marker)) |
| 11142 | { |
| 11143 | if (strcmp (b->static_trace_marker_id, marker.str_id) != 0) |
| 11144 | warning (_("static tracepoint %d changed probed marker from %s to %s"), |
| 11145 | b->number, |
| 11146 | b->static_trace_marker_id, marker.str_id); |
| 11147 | |
| 11148 | xfree (b->static_trace_marker_id); |
| 11149 | b->static_trace_marker_id = xstrdup (marker.str_id); |
| 11150 | release_static_tracepoint_marker (&marker); |
| 11151 | |
| 11152 | return sal; |
| 11153 | } |
| 11154 | |
| 11155 | /* Old marker wasn't found on target at lineno. Try looking it up |
| 11156 | by string ID. */ |
| 11157 | if (!sal.explicit_pc |
| 11158 | && sal.line != 0 |
| 11159 | && sal.symtab != NULL |
| 11160 | && b->static_trace_marker_id != NULL) |
| 11161 | { |
| 11162 | VEC(static_tracepoint_marker_p) *markers; |
| 11163 | |
| 11164 | markers |
| 11165 | = target_static_tracepoint_markers_by_strid (b->static_trace_marker_id); |
| 11166 | |
| 11167 | if (!VEC_empty(static_tracepoint_marker_p, markers)) |
| 11168 | { |
| 11169 | struct symtab_and_line sal; |
| 11170 | struct symbol *sym; |
| 11171 | struct static_tracepoint_marker *marker; |
| 11172 | |
| 11173 | marker = VEC_index (static_tracepoint_marker_p, markers, 0); |
| 11174 | |
| 11175 | xfree (b->static_trace_marker_id); |
| 11176 | b->static_trace_marker_id = xstrdup (marker->str_id); |
| 11177 | |
| 11178 | warning (_("marker for static tracepoint %d (%s) not " |
| 11179 | "found at previous line number"), |
| 11180 | b->number, b->static_trace_marker_id); |
| 11181 | |
| 11182 | init_sal (&sal); |
| 11183 | |
| 11184 | sal.pc = marker->address; |
| 11185 | |
| 11186 | sal = find_pc_line (marker->address, 0); |
| 11187 | sym = find_pc_sect_function (marker->address, NULL); |
| 11188 | ui_out_text (uiout, "Now in "); |
| 11189 | if (sym) |
| 11190 | { |
| 11191 | ui_out_field_string (uiout, "func", |
| 11192 | SYMBOL_PRINT_NAME (sym)); |
| 11193 | ui_out_text (uiout, " at "); |
| 11194 | } |
| 11195 | ui_out_field_string (uiout, "file", sal.symtab->filename); |
| 11196 | ui_out_text (uiout, ":"); |
| 11197 | |
| 11198 | if (ui_out_is_mi_like_p (uiout)) |
| 11199 | { |
| 11200 | char *fullname = symtab_to_fullname (sal.symtab); |
| 11201 | |
| 11202 | if (fullname) |
| 11203 | ui_out_field_string (uiout, "fullname", fullname); |
| 11204 | } |
| 11205 | |
| 11206 | ui_out_field_int (uiout, "line", sal.line); |
| 11207 | ui_out_text (uiout, "\n"); |
| 11208 | |
| 11209 | b->line_number = sal.line; |
| 11210 | |
| 11211 | xfree (b->source_file); |
| 11212 | if (sym) |
| 11213 | b->source_file = xstrdup (sal.symtab->filename); |
| 11214 | else |
| 11215 | b->source_file = NULL; |
| 11216 | |
| 11217 | xfree (b->addr_string); |
| 11218 | b->addr_string = xstrprintf ("%s:%d", |
| 11219 | sal.symtab->filename, b->line_number); |
| 11220 | |
| 11221 | /* Might be nice to check if function changed, and warn if |
| 11222 | so. */ |
| 11223 | |
| 11224 | release_static_tracepoint_marker (marker); |
| 11225 | } |
| 11226 | } |
| 11227 | return sal; |
| 11228 | } |
| 11229 | |
| 11230 | /* Returns 1 iff locations A and B are sufficiently same that |
| 11231 | we don't need to report breakpoint as changed. */ |
| 11232 | |
| 11233 | static int |
| 11234 | locations_are_equal (struct bp_location *a, struct bp_location *b) |
| 11235 | { |
| 11236 | while (a && b) |
| 11237 | { |
| 11238 | if (a->address != b->address) |
| 11239 | return 0; |
| 11240 | |
| 11241 | if (a->shlib_disabled != b->shlib_disabled) |
| 11242 | return 0; |
| 11243 | |
| 11244 | if (a->enabled != b->enabled) |
| 11245 | return 0; |
| 11246 | |
| 11247 | a = a->next; |
| 11248 | b = b->next; |
| 11249 | } |
| 11250 | |
| 11251 | if ((a == NULL) != (b == NULL)) |
| 11252 | return 0; |
| 11253 | |
| 11254 | return 1; |
| 11255 | } |
| 11256 | |
| 11257 | /* Create new breakpoint locations for B (a hardware or software breakpoint) |
| 11258 | based on SALS and SALS_END. If SALS_END.NELTS is not zero, then B is |
| 11259 | a ranged breakpoint. */ |
| 11260 | |
| 11261 | void |
| 11262 | update_breakpoint_locations (struct breakpoint *b, |
| 11263 | struct symtabs_and_lines sals, |
| 11264 | struct symtabs_and_lines sals_end) |
| 11265 | { |
| 11266 | int i; |
| 11267 | struct bp_location *existing_locations = b->loc; |
| 11268 | |
| 11269 | /* Ranged breakpoints have only one start location and one end location. */ |
| 11270 | gdb_assert (sals_end.nelts == 0 || (sals.nelts == 1 && sals_end.nelts == 1)); |
| 11271 | |
| 11272 | /* If there's no new locations, and all existing locations are |
| 11273 | pending, don't do anything. This optimizes the common case where |
| 11274 | all locations are in the same shared library, that was unloaded. |
| 11275 | We'd like to retain the location, so that when the library is |
| 11276 | loaded again, we don't loose the enabled/disabled status of the |
| 11277 | individual locations. */ |
| 11278 | if (all_locations_are_pending (existing_locations) && sals.nelts == 0) |
| 11279 | return; |
| 11280 | |
| 11281 | b->loc = NULL; |
| 11282 | |
| 11283 | for (i = 0; i < sals.nelts; ++i) |
| 11284 | { |
| 11285 | struct bp_location *new_loc = |
| 11286 | add_location_to_breakpoint (b, &(sals.sals[i])); |
| 11287 | |
| 11288 | /* Reparse conditions, they might contain references to the |
| 11289 | old symtab. */ |
| 11290 | if (b->cond_string != NULL) |
| 11291 | { |
| 11292 | char *s; |
| 11293 | struct gdb_exception e; |
| 11294 | |
| 11295 | s = b->cond_string; |
| 11296 | TRY_CATCH (e, RETURN_MASK_ERROR) |
| 11297 | { |
| 11298 | new_loc->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), |
| 11299 | 0); |
| 11300 | } |
| 11301 | if (e.reason < 0) |
| 11302 | { |
| 11303 | warning (_("failed to reevaluate condition " |
| 11304 | "for breakpoint %d: %s"), |
| 11305 | b->number, e.message); |
| 11306 | new_loc->enabled = 0; |
| 11307 | } |
| 11308 | } |
| 11309 | |
| 11310 | if (b->source_file != NULL) |
| 11311 | xfree (b->source_file); |
| 11312 | if (sals.sals[i].symtab == NULL) |
| 11313 | b->source_file = NULL; |
| 11314 | else |
| 11315 | b->source_file = xstrdup (sals.sals[i].symtab->filename); |
| 11316 | |
| 11317 | if (b->line_number == 0) |
| 11318 | b->line_number = sals.sals[i].line; |
| 11319 | |
| 11320 | if (sals_end.nelts) |
| 11321 | { |
| 11322 | CORE_ADDR end = find_breakpoint_range_end (sals_end.sals[0]); |
| 11323 | |
| 11324 | new_loc->length = end - sals.sals[0].pc + 1; |
| 11325 | } |
| 11326 | } |
| 11327 | |
| 11328 | /* Update locations of permanent breakpoints. */ |
| 11329 | if (b->enable_state == bp_permanent) |
| 11330 | make_breakpoint_permanent (b); |
| 11331 | |
| 11332 | /* If possible, carry over 'disable' status from existing |
| 11333 | breakpoints. */ |
| 11334 | { |
| 11335 | struct bp_location *e = existing_locations; |
| 11336 | /* If there are multiple breakpoints with the same function name, |
| 11337 | e.g. for inline functions, comparing function names won't work. |
| 11338 | Instead compare pc addresses; this is just a heuristic as things |
| 11339 | may have moved, but in practice it gives the correct answer |
| 11340 | often enough until a better solution is found. */ |
| 11341 | int have_ambiguous_names = ambiguous_names_p (b->loc); |
| 11342 | |
| 11343 | for (; e; e = e->next) |
| 11344 | { |
| 11345 | if (!e->enabled && e->function_name) |
| 11346 | { |
| 11347 | struct bp_location *l = b->loc; |
| 11348 | if (have_ambiguous_names) |
| 11349 | { |
| 11350 | for (; l; l = l->next) |
| 11351 | if (breakpoint_locations_match (e, l)) |
| 11352 | { |
| 11353 | l->enabled = 0; |
| 11354 | break; |
| 11355 | } |
| 11356 | } |
| 11357 | else |
| 11358 | { |
| 11359 | for (; l; l = l->next) |
| 11360 | if (l->function_name |
| 11361 | && strcmp (e->function_name, l->function_name) == 0) |
| 11362 | { |
| 11363 | l->enabled = 0; |
| 11364 | break; |
| 11365 | } |
| 11366 | } |
| 11367 | } |
| 11368 | } |
| 11369 | } |
| 11370 | |
| 11371 | if (!locations_are_equal (existing_locations, b->loc)) |
| 11372 | observer_notify_breakpoint_modified (b); |
| 11373 | |
| 11374 | update_global_location_list (1); |
| 11375 | } |
| 11376 | |
| 11377 | /* Find the SaL locations corresponding to the given ADDR_STRING. |
| 11378 | On return, FOUND will be 1 if any SaL was found, zero otherwise. */ |
| 11379 | |
| 11380 | static struct symtabs_and_lines |
| 11381 | addr_string_to_sals (struct breakpoint *b, char *addr_string, int *found) |
| 11382 | { |
| 11383 | char *s; |
| 11384 | int marker_spec; |
| 11385 | struct symtabs_and_lines sals = {0}; |
| 11386 | struct gdb_exception e; |
| 11387 | |
| 11388 | s = addr_string; |
| 11389 | marker_spec = b->type == bp_static_tracepoint && is_marker_spec (s); |
| 11390 | |
| 11391 | TRY_CATCH (e, RETURN_MASK_ERROR) |
| 11392 | { |
| 11393 | if (marker_spec) |
| 11394 | { |
| 11395 | sals = decode_static_tracepoint_spec (&s); |
| 11396 | if (sals.nelts > b->static_trace_marker_id_idx) |
| 11397 | { |
| 11398 | sals.sals[0] = sals.sals[b->static_trace_marker_id_idx]; |
| 11399 | sals.nelts = 1; |
| 11400 | } |
| 11401 | else |
| 11402 | error (_("marker %s not found"), b->static_trace_marker_id); |
| 11403 | } |
| 11404 | else |
| 11405 | sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, NULL); |
| 11406 | } |
| 11407 | if (e.reason < 0) |
| 11408 | { |
| 11409 | int not_found_and_ok = 0; |
| 11410 | /* For pending breakpoints, it's expected that parsing will |
| 11411 | fail until the right shared library is loaded. User has |
| 11412 | already told to create pending breakpoints and don't need |
| 11413 | extra messages. If breakpoint is in bp_shlib_disabled |
| 11414 | state, then user already saw the message about that |
| 11415 | breakpoint being disabled, and don't want to see more |
| 11416 | errors. */ |
| 11417 | if (e.error == NOT_FOUND_ERROR |
| 11418 | && (b->condition_not_parsed |
| 11419 | || (b->loc && b->loc->shlib_disabled) |
| 11420 | || b->enable_state == bp_disabled)) |
| 11421 | not_found_and_ok = 1; |
| 11422 | |
| 11423 | if (!not_found_and_ok) |
| 11424 | { |
| 11425 | /* We surely don't want to warn about the same breakpoint |
| 11426 | 10 times. One solution, implemented here, is disable |
| 11427 | the breakpoint on error. Another solution would be to |
| 11428 | have separate 'warning emitted' flag. Since this |
| 11429 | happens only when a binary has changed, I don't know |
| 11430 | which approach is better. */ |
| 11431 | b->enable_state = bp_disabled; |
| 11432 | throw_exception (e); |
| 11433 | } |
| 11434 | } |
| 11435 | |
| 11436 | if (e.reason == 0 || e.error != NOT_FOUND_ERROR) |
| 11437 | { |
| 11438 | gdb_assert (sals.nelts == 1); |
| 11439 | |
| 11440 | resolve_sal_pc (&sals.sals[0]); |
| 11441 | if (b->condition_not_parsed && s && s[0]) |
| 11442 | { |
| 11443 | char *cond_string = 0; |
| 11444 | int thread = -1; |
| 11445 | int task = 0; |
| 11446 | |
| 11447 | find_condition_and_thread (s, sals.sals[0].pc, |
| 11448 | &cond_string, &thread, &task); |
| 11449 | if (cond_string) |
| 11450 | b->cond_string = cond_string; |
| 11451 | b->thread = thread; |
| 11452 | b->task = task; |
| 11453 | b->condition_not_parsed = 0; |
| 11454 | } |
| 11455 | |
| 11456 | if (b->type == bp_static_tracepoint && !marker_spec) |
| 11457 | sals.sals[0] = update_static_tracepoint (b, sals.sals[0]); |
| 11458 | |
| 11459 | *found = 1; |
| 11460 | } |
| 11461 | else |
| 11462 | *found = 0; |
| 11463 | |
| 11464 | return sals; |
| 11465 | } |
| 11466 | |
| 11467 | /* Reevaluate a hardware or software breakpoint and recreate its locations. |
| 11468 | This is necessary after symbols are read (e.g., an executable or DSO |
| 11469 | was loaded, or the inferior just started). */ |
| 11470 | |
| 11471 | static void |
| 11472 | re_set_breakpoint (struct breakpoint *b) |
| 11473 | { |
| 11474 | int found; |
| 11475 | struct symtabs_and_lines sals, sals_end; |
| 11476 | struct symtabs_and_lines expanded = {0}; |
| 11477 | struct symtabs_and_lines expanded_end = {0}; |
| 11478 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 11479 | |
| 11480 | input_radix = b->input_radix; |
| 11481 | save_current_space_and_thread (); |
| 11482 | switch_to_program_space_and_thread (b->pspace); |
| 11483 | set_language (b->language); |
| 11484 | |
| 11485 | sals = addr_string_to_sals (b, b->addr_string, &found); |
| 11486 | if (found) |
| 11487 | { |
| 11488 | make_cleanup (xfree, sals.sals); |
| 11489 | expanded = expand_line_sal_maybe (sals.sals[0]); |
| 11490 | } |
| 11491 | |
| 11492 | if (b->addr_string_range_end) |
| 11493 | { |
| 11494 | sals_end = addr_string_to_sals (b, b->addr_string_range_end, &found); |
| 11495 | if (found) |
| 11496 | { |
| 11497 | make_cleanup (xfree, sals_end.sals); |
| 11498 | expanded_end = expand_line_sal_maybe (sals_end.sals[0]); |
| 11499 | } |
| 11500 | } |
| 11501 | |
| 11502 | update_breakpoint_locations (b, expanded, expanded_end); |
| 11503 | do_cleanups (cleanups); |
| 11504 | } |
| 11505 | |
| 11506 | /* Reset a breakpoint given it's struct breakpoint * BINT. |
| 11507 | The value we return ends up being the return value from catch_errors. |
| 11508 | Unused in this case. */ |
| 11509 | |
| 11510 | static int |
| 11511 | breakpoint_re_set_one (void *bint) |
| 11512 | { |
| 11513 | /* Get past catch_errs. */ |
| 11514 | struct breakpoint *b = (struct breakpoint *) bint; |
| 11515 | |
| 11516 | switch (b->type) |
| 11517 | { |
| 11518 | case bp_none: |
| 11519 | warning (_("attempted to reset apparently deleted breakpoint #%d?"), |
| 11520 | b->number); |
| 11521 | return 0; |
| 11522 | case bp_breakpoint: |
| 11523 | case bp_hardware_breakpoint: |
| 11524 | case bp_tracepoint: |
| 11525 | case bp_fast_tracepoint: |
| 11526 | case bp_static_tracepoint: |
| 11527 | case bp_gnu_ifunc_resolver: |
| 11528 | /* Do not attempt to re-set breakpoints disabled during startup. */ |
| 11529 | if (b->enable_state == bp_startup_disabled) |
| 11530 | return 0; |
| 11531 | |
| 11532 | if (b->addr_string == NULL) |
| 11533 | { |
| 11534 | /* Anything without a string can't be re-set. */ |
| 11535 | delete_breakpoint (b); |
| 11536 | return 0; |
| 11537 | } |
| 11538 | |
| 11539 | re_set_breakpoint (b); |
| 11540 | break; |
| 11541 | |
| 11542 | case bp_watchpoint: |
| 11543 | case bp_hardware_watchpoint: |
| 11544 | case bp_read_watchpoint: |
| 11545 | case bp_access_watchpoint: |
| 11546 | /* Watchpoint can be either on expression using entirely global |
| 11547 | variables, or it can be on local variables. |
| 11548 | |
| 11549 | Watchpoints of the first kind are never auto-deleted, and |
| 11550 | even persist across program restarts. Since they can use |
| 11551 | variables from shared libraries, we need to reparse |
| 11552 | expression as libraries are loaded and unloaded. |
| 11553 | |
| 11554 | Watchpoints on local variables can also change meaning as |
| 11555 | result of solib event. For example, if a watchpoint uses |
| 11556 | both a local and a global variables in expression, it's a |
| 11557 | local watchpoint, but unloading of a shared library will make |
| 11558 | the expression invalid. This is not a very common use case, |
| 11559 | but we still re-evaluate expression, to avoid surprises to |
| 11560 | the user. |
| 11561 | |
| 11562 | Note that for local watchpoints, we re-evaluate it only if |
| 11563 | watchpoints frame id is still valid. If it's not, it means |
| 11564 | the watchpoint is out of scope and will be deleted soon. In |
| 11565 | fact, I'm not sure we'll ever be called in this case. |
| 11566 | |
| 11567 | If a local watchpoint's frame id is still valid, then |
| 11568 | b->exp_valid_block is likewise valid, and we can safely use it. |
| 11569 | |
| 11570 | Don't do anything about disabled watchpoints, since they will |
| 11571 | be reevaluated again when enabled. */ |
| 11572 | update_watchpoint (b, 1 /* reparse */); |
| 11573 | break; |
| 11574 | /* We needn't really do anything to reset these, since the mask |
| 11575 | that requests them is unaffected by e.g., new libraries being |
| 11576 | loaded. */ |
| 11577 | case bp_catchpoint: |
| 11578 | break; |
| 11579 | |
| 11580 | default: |
| 11581 | printf_filtered (_("Deleting unknown breakpoint type %d\n"), b->type); |
| 11582 | /* fall through */ |
| 11583 | /* Delete overlay event and longjmp master breakpoints; they will be |
| 11584 | reset later by breakpoint_re_set. */ |
| 11585 | case bp_overlay_event: |
| 11586 | case bp_longjmp_master: |
| 11587 | case bp_std_terminate_master: |
| 11588 | case bp_exception_master: |
| 11589 | delete_breakpoint (b); |
| 11590 | break; |
| 11591 | |
| 11592 | /* This breakpoint is special, it's set up when the inferior |
| 11593 | starts and we really don't want to touch it. */ |
| 11594 | case bp_shlib_event: |
| 11595 | |
| 11596 | /* Like bp_shlib_event, this breakpoint type is special. |
| 11597 | Once it is set up, we do not want to touch it. */ |
| 11598 | case bp_thread_event: |
| 11599 | |
| 11600 | /* Keep temporary breakpoints, which can be encountered when we |
| 11601 | step over a dlopen call and SOLIB_ADD is resetting the |
| 11602 | breakpoints. Otherwise these should have been blown away via |
| 11603 | the cleanup chain or by breakpoint_init_inferior when we |
| 11604 | rerun the executable. */ |
| 11605 | case bp_until: |
| 11606 | case bp_finish: |
| 11607 | case bp_watchpoint_scope: |
| 11608 | case bp_call_dummy: |
| 11609 | case bp_std_terminate: |
| 11610 | case bp_step_resume: |
| 11611 | case bp_hp_step_resume: |
| 11612 | case bp_longjmp: |
| 11613 | case bp_longjmp_resume: |
| 11614 | case bp_exception: |
| 11615 | case bp_exception_resume: |
| 11616 | case bp_jit_event: |
| 11617 | case bp_gnu_ifunc_resolver_return: |
| 11618 | break; |
| 11619 | } |
| 11620 | |
| 11621 | return 0; |
| 11622 | } |
| 11623 | |
| 11624 | /* Re-set all breakpoints after symbols have been re-loaded. */ |
| 11625 | void |
| 11626 | breakpoint_re_set (void) |
| 11627 | { |
| 11628 | struct breakpoint *b, *b_tmp; |
| 11629 | enum language save_language; |
| 11630 | int save_input_radix; |
| 11631 | struct cleanup *old_chain; |
| 11632 | |
| 11633 | save_language = current_language->la_language; |
| 11634 | save_input_radix = input_radix; |
| 11635 | old_chain = save_current_program_space (); |
| 11636 | |
| 11637 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 11638 | { |
| 11639 | /* Format possible error msg. */ |
| 11640 | char *message = xstrprintf ("Error in re-setting breakpoint %d: ", |
| 11641 | b->number); |
| 11642 | struct cleanup *cleanups = make_cleanup (xfree, message); |
| 11643 | catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL); |
| 11644 | do_cleanups (cleanups); |
| 11645 | } |
| 11646 | set_language (save_language); |
| 11647 | input_radix = save_input_radix; |
| 11648 | |
| 11649 | jit_breakpoint_re_set (); |
| 11650 | |
| 11651 | do_cleanups (old_chain); |
| 11652 | |
| 11653 | create_overlay_event_breakpoint (); |
| 11654 | create_longjmp_master_breakpoint (); |
| 11655 | create_std_terminate_master_breakpoint (); |
| 11656 | create_exception_master_breakpoint (); |
| 11657 | } |
| 11658 | \f |
| 11659 | /* Reset the thread number of this breakpoint: |
| 11660 | |
| 11661 | - If the breakpoint is for all threads, leave it as-is. |
| 11662 | - Else, reset it to the current thread for inferior_ptid. */ |
| 11663 | void |
| 11664 | breakpoint_re_set_thread (struct breakpoint *b) |
| 11665 | { |
| 11666 | if (b->thread != -1) |
| 11667 | { |
| 11668 | if (in_thread_list (inferior_ptid)) |
| 11669 | b->thread = pid_to_thread_id (inferior_ptid); |
| 11670 | |
| 11671 | /* We're being called after following a fork. The new fork is |
| 11672 | selected as current, and unless this was a vfork will have a |
| 11673 | different program space from the original thread. Reset that |
| 11674 | as well. */ |
| 11675 | b->loc->pspace = current_program_space; |
| 11676 | } |
| 11677 | } |
| 11678 | |
| 11679 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| 11680 | If from_tty is nonzero, it prints a message to that effect, |
| 11681 | which ends with a period (no newline). */ |
| 11682 | |
| 11683 | void |
| 11684 | set_ignore_count (int bptnum, int count, int from_tty) |
| 11685 | { |
| 11686 | struct breakpoint *b; |
| 11687 | |
| 11688 | if (count < 0) |
| 11689 | count = 0; |
| 11690 | |
| 11691 | ALL_BREAKPOINTS (b) |
| 11692 | if (b->number == bptnum) |
| 11693 | { |
| 11694 | if (is_tracepoint (b)) |
| 11695 | { |
| 11696 | if (from_tty && count != 0) |
| 11697 | printf_filtered (_("Ignore count ignored for tracepoint %d."), |
| 11698 | bptnum); |
| 11699 | return; |
| 11700 | } |
| 11701 | |
| 11702 | b->ignore_count = count; |
| 11703 | if (from_tty) |
| 11704 | { |
| 11705 | if (count == 0) |
| 11706 | printf_filtered (_("Will stop next time " |
| 11707 | "breakpoint %d is reached."), |
| 11708 | bptnum); |
| 11709 | else if (count == 1) |
| 11710 | printf_filtered (_("Will ignore next crossing of breakpoint %d."), |
| 11711 | bptnum); |
| 11712 | else |
| 11713 | printf_filtered (_("Will ignore next %d " |
| 11714 | "crossings of breakpoint %d."), |
| 11715 | count, bptnum); |
| 11716 | } |
| 11717 | breakpoints_changed (); |
| 11718 | observer_notify_breakpoint_modified (b); |
| 11719 | return; |
| 11720 | } |
| 11721 | |
| 11722 | error (_("No breakpoint number %d."), bptnum); |
| 11723 | } |
| 11724 | |
| 11725 | /* Command to set ignore-count of breakpoint N to COUNT. */ |
| 11726 | |
| 11727 | static void |
| 11728 | ignore_command (char *args, int from_tty) |
| 11729 | { |
| 11730 | char *p = args; |
| 11731 | int num; |
| 11732 | |
| 11733 | if (p == 0) |
| 11734 | error_no_arg (_("a breakpoint number")); |
| 11735 | |
| 11736 | num = get_number (&p); |
| 11737 | if (num == 0) |
| 11738 | error (_("bad breakpoint number: '%s'"), args); |
| 11739 | if (*p == 0) |
| 11740 | error (_("Second argument (specified ignore-count) is missing.")); |
| 11741 | |
| 11742 | set_ignore_count (num, |
| 11743 | longest_to_int (value_as_long (parse_and_eval (p))), |
| 11744 | from_tty); |
| 11745 | if (from_tty) |
| 11746 | printf_filtered ("\n"); |
| 11747 | } |
| 11748 | \f |
| 11749 | /* Call FUNCTION on each of the breakpoints |
| 11750 | whose numbers are given in ARGS. */ |
| 11751 | |
| 11752 | static void |
| 11753 | map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *, |
| 11754 | void *), |
| 11755 | void *data) |
| 11756 | { |
| 11757 | int num; |
| 11758 | struct breakpoint *b, *tmp; |
| 11759 | int match; |
| 11760 | struct get_number_or_range_state state; |
| 11761 | |
| 11762 | if (args == 0) |
| 11763 | error_no_arg (_("one or more breakpoint numbers")); |
| 11764 | |
| 11765 | init_number_or_range (&state, args); |
| 11766 | |
| 11767 | while (!state.finished) |
| 11768 | { |
| 11769 | char *p = state.string; |
| 11770 | |
| 11771 | match = 0; |
| 11772 | |
| 11773 | num = get_number_or_range (&state); |
| 11774 | if (num == 0) |
| 11775 | { |
| 11776 | warning (_("bad breakpoint number at or near '%s'"), p); |
| 11777 | } |
| 11778 | else |
| 11779 | { |
| 11780 | ALL_BREAKPOINTS_SAFE (b, tmp) |
| 11781 | if (b->number == num) |
| 11782 | { |
| 11783 | match = 1; |
| 11784 | function (b, data); |
| 11785 | break; |
| 11786 | } |
| 11787 | if (match == 0) |
| 11788 | printf_unfiltered (_("No breakpoint number %d.\n"), num); |
| 11789 | } |
| 11790 | } |
| 11791 | } |
| 11792 | |
| 11793 | static struct bp_location * |
| 11794 | find_location_by_number (char *number) |
| 11795 | { |
| 11796 | char *dot = strchr (number, '.'); |
| 11797 | char *p1; |
| 11798 | int bp_num; |
| 11799 | int loc_num; |
| 11800 | struct breakpoint *b; |
| 11801 | struct bp_location *loc; |
| 11802 | |
| 11803 | *dot = '\0'; |
| 11804 | |
| 11805 | p1 = number; |
| 11806 | bp_num = get_number (&p1); |
| 11807 | if (bp_num == 0) |
| 11808 | error (_("Bad breakpoint number '%s'"), number); |
| 11809 | |
| 11810 | ALL_BREAKPOINTS (b) |
| 11811 | if (b->number == bp_num) |
| 11812 | { |
| 11813 | break; |
| 11814 | } |
| 11815 | |
| 11816 | if (!b || b->number != bp_num) |
| 11817 | error (_("Bad breakpoint number '%s'"), number); |
| 11818 | |
| 11819 | p1 = dot+1; |
| 11820 | loc_num = get_number (&p1); |
| 11821 | if (loc_num == 0) |
| 11822 | error (_("Bad breakpoint location number '%s'"), number); |
| 11823 | |
| 11824 | --loc_num; |
| 11825 | loc = b->loc; |
| 11826 | for (;loc_num && loc; --loc_num, loc = loc->next) |
| 11827 | ; |
| 11828 | if (!loc) |
| 11829 | error (_("Bad breakpoint location number '%s'"), dot+1); |
| 11830 | |
| 11831 | return loc; |
| 11832 | } |
| 11833 | |
| 11834 | |
| 11835 | /* Set ignore-count of breakpoint number BPTNUM to COUNT. |
| 11836 | If from_tty is nonzero, it prints a message to that effect, |
| 11837 | which ends with a period (no newline). */ |
| 11838 | |
| 11839 | void |
| 11840 | disable_breakpoint (struct breakpoint *bpt) |
| 11841 | { |
| 11842 | /* Never disable a watchpoint scope breakpoint; we want to |
| 11843 | hit them when we leave scope so we can delete both the |
| 11844 | watchpoint and its scope breakpoint at that time. */ |
| 11845 | if (bpt->type == bp_watchpoint_scope) |
| 11846 | return; |
| 11847 | |
| 11848 | /* You can't disable permanent breakpoints. */ |
| 11849 | if (bpt->enable_state == bp_permanent) |
| 11850 | return; |
| 11851 | |
| 11852 | bpt->enable_state = bp_disabled; |
| 11853 | |
| 11854 | if (target_supports_enable_disable_tracepoint () |
| 11855 | && current_trace_status ()->running && is_tracepoint (bpt)) |
| 11856 | { |
| 11857 | struct bp_location *location; |
| 11858 | |
| 11859 | for (location = bpt->loc; location; location = location->next) |
| 11860 | target_disable_tracepoint (location); |
| 11861 | } |
| 11862 | |
| 11863 | update_global_location_list (0); |
| 11864 | |
| 11865 | observer_notify_breakpoint_modified (bpt); |
| 11866 | } |
| 11867 | |
| 11868 | /* A callback for iterate_over_related_breakpoints. */ |
| 11869 | |
| 11870 | static void |
| 11871 | do_disable_breakpoint (struct breakpoint *b, void *ignore) |
| 11872 | { |
| 11873 | disable_breakpoint (b); |
| 11874 | } |
| 11875 | |
| 11876 | /* A callback for map_breakpoint_numbers that calls |
| 11877 | disable_breakpoint. */ |
| 11878 | |
| 11879 | static void |
| 11880 | do_map_disable_breakpoint (struct breakpoint *b, void *ignore) |
| 11881 | { |
| 11882 | iterate_over_related_breakpoints (b, do_disable_breakpoint, NULL); |
| 11883 | } |
| 11884 | |
| 11885 | static void |
| 11886 | disable_command (char *args, int from_tty) |
| 11887 | { |
| 11888 | if (args == 0) |
| 11889 | { |
| 11890 | struct breakpoint *bpt; |
| 11891 | |
| 11892 | ALL_BREAKPOINTS (bpt) |
| 11893 | if (user_breakpoint_p (bpt)) |
| 11894 | disable_breakpoint (bpt); |
| 11895 | } |
| 11896 | else if (strchr (args, '.')) |
| 11897 | { |
| 11898 | struct bp_location *loc = find_location_by_number (args); |
| 11899 | if (loc) |
| 11900 | { |
| 11901 | loc->enabled = 0; |
| 11902 | if (target_supports_enable_disable_tracepoint () |
| 11903 | && current_trace_status ()->running && loc->owner |
| 11904 | && is_tracepoint (loc->owner)) |
| 11905 | target_disable_tracepoint (loc); |
| 11906 | } |
| 11907 | update_global_location_list (0); |
| 11908 | } |
| 11909 | else |
| 11910 | map_breakpoint_numbers (args, do_map_disable_breakpoint, NULL); |
| 11911 | } |
| 11912 | |
| 11913 | static void |
| 11914 | enable_breakpoint_disp (struct breakpoint *bpt, enum bpdisp disposition) |
| 11915 | { |
| 11916 | int target_resources_ok; |
| 11917 | |
| 11918 | if (bpt->type == bp_hardware_breakpoint) |
| 11919 | { |
| 11920 | int i; |
| 11921 | i = hw_breakpoint_used_count (); |
| 11922 | target_resources_ok = |
| 11923 | target_can_use_hardware_watchpoint (bp_hardware_breakpoint, |
| 11924 | i + 1, 0); |
| 11925 | if (target_resources_ok == 0) |
| 11926 | error (_("No hardware breakpoint support in the target.")); |
| 11927 | else if (target_resources_ok < 0) |
| 11928 | error (_("Hardware breakpoints used exceeds limit.")); |
| 11929 | } |
| 11930 | |
| 11931 | if (is_watchpoint (bpt)) |
| 11932 | { |
| 11933 | /* Initialize it just to avoid a GCC false warning. */ |
| 11934 | enum enable_state orig_enable_state = 0; |
| 11935 | struct gdb_exception e; |
| 11936 | |
| 11937 | TRY_CATCH (e, RETURN_MASK_ALL) |
| 11938 | { |
| 11939 | orig_enable_state = bpt->enable_state; |
| 11940 | bpt->enable_state = bp_enabled; |
| 11941 | update_watchpoint (bpt, 1 /* reparse */); |
| 11942 | } |
| 11943 | if (e.reason < 0) |
| 11944 | { |
| 11945 | bpt->enable_state = orig_enable_state; |
| 11946 | exception_fprintf (gdb_stderr, e, _("Cannot enable watchpoint %d: "), |
| 11947 | bpt->number); |
| 11948 | return; |
| 11949 | } |
| 11950 | } |
| 11951 | |
| 11952 | if (bpt->enable_state != bp_permanent) |
| 11953 | bpt->enable_state = bp_enabled; |
| 11954 | |
| 11955 | if (target_supports_enable_disable_tracepoint () |
| 11956 | && current_trace_status ()->running && is_tracepoint (bpt)) |
| 11957 | { |
| 11958 | struct bp_location *location; |
| 11959 | |
| 11960 | for (location = bpt->loc; location; location = location->next) |
| 11961 | target_enable_tracepoint (location); |
| 11962 | } |
| 11963 | |
| 11964 | bpt->disposition = disposition; |
| 11965 | update_global_location_list (1); |
| 11966 | breakpoints_changed (); |
| 11967 | |
| 11968 | observer_notify_breakpoint_modified (bpt); |
| 11969 | } |
| 11970 | |
| 11971 | |
| 11972 | void |
| 11973 | enable_breakpoint (struct breakpoint *bpt) |
| 11974 | { |
| 11975 | enable_breakpoint_disp (bpt, bpt->disposition); |
| 11976 | } |
| 11977 | |
| 11978 | static void |
| 11979 | do_enable_breakpoint (struct breakpoint *bpt, void *arg) |
| 11980 | { |
| 11981 | enable_breakpoint (bpt); |
| 11982 | } |
| 11983 | |
| 11984 | /* A callback for map_breakpoint_numbers that calls |
| 11985 | enable_breakpoint. */ |
| 11986 | |
| 11987 | static void |
| 11988 | do_map_enable_breakpoint (struct breakpoint *b, void *ignore) |
| 11989 | { |
| 11990 | iterate_over_related_breakpoints (b, do_enable_breakpoint, NULL); |
| 11991 | } |
| 11992 | |
| 11993 | /* The enable command enables the specified breakpoints (or all defined |
| 11994 | breakpoints) so they once again become (or continue to be) effective |
| 11995 | in stopping the inferior. */ |
| 11996 | |
| 11997 | static void |
| 11998 | enable_command (char *args, int from_tty) |
| 11999 | { |
| 12000 | if (args == 0) |
| 12001 | { |
| 12002 | struct breakpoint *bpt; |
| 12003 | |
| 12004 | ALL_BREAKPOINTS (bpt) |
| 12005 | if (user_breakpoint_p (bpt)) |
| 12006 | enable_breakpoint (bpt); |
| 12007 | } |
| 12008 | else if (strchr (args, '.')) |
| 12009 | { |
| 12010 | struct bp_location *loc = find_location_by_number (args); |
| 12011 | if (loc) |
| 12012 | { |
| 12013 | loc->enabled = 1; |
| 12014 | if (target_supports_enable_disable_tracepoint () |
| 12015 | && current_trace_status ()->running && loc->owner |
| 12016 | && is_tracepoint (loc->owner)) |
| 12017 | target_enable_tracepoint (loc); |
| 12018 | } |
| 12019 | update_global_location_list (1); |
| 12020 | } |
| 12021 | else |
| 12022 | map_breakpoint_numbers (args, do_map_enable_breakpoint, NULL); |
| 12023 | } |
| 12024 | |
| 12025 | static void |
| 12026 | do_enable_breakpoint_disp (struct breakpoint *bpt, void *arg) |
| 12027 | { |
| 12028 | enum bpdisp disp = *(enum bpdisp *) arg; |
| 12029 | |
| 12030 | enable_breakpoint_disp (bpt, disp); |
| 12031 | } |
| 12032 | |
| 12033 | static void |
| 12034 | do_map_enable_once_breakpoint (struct breakpoint *bpt, void *ignore) |
| 12035 | { |
| 12036 | enum bpdisp disp = disp_disable; |
| 12037 | |
| 12038 | iterate_over_related_breakpoints (bpt, do_enable_breakpoint_disp, &disp); |
| 12039 | } |
| 12040 | |
| 12041 | static void |
| 12042 | enable_once_command (char *args, int from_tty) |
| 12043 | { |
| 12044 | map_breakpoint_numbers (args, do_map_enable_once_breakpoint, NULL); |
| 12045 | } |
| 12046 | |
| 12047 | static void |
| 12048 | do_map_enable_delete_breakpoint (struct breakpoint *bpt, void *ignore) |
| 12049 | { |
| 12050 | enum bpdisp disp = disp_del; |
| 12051 | |
| 12052 | iterate_over_related_breakpoints (bpt, do_enable_breakpoint_disp, &disp); |
| 12053 | } |
| 12054 | |
| 12055 | static void |
| 12056 | enable_delete_command (char *args, int from_tty) |
| 12057 | { |
| 12058 | map_breakpoint_numbers (args, do_map_enable_delete_breakpoint, NULL); |
| 12059 | } |
| 12060 | \f |
| 12061 | static void |
| 12062 | set_breakpoint_cmd (char *args, int from_tty) |
| 12063 | { |
| 12064 | } |
| 12065 | |
| 12066 | static void |
| 12067 | show_breakpoint_cmd (char *args, int from_tty) |
| 12068 | { |
| 12069 | } |
| 12070 | |
| 12071 | /* Invalidate last known value of any hardware watchpoint if |
| 12072 | the memory which that value represents has been written to by |
| 12073 | GDB itself. */ |
| 12074 | |
| 12075 | static void |
| 12076 | invalidate_bp_value_on_memory_change (CORE_ADDR addr, int len, |
| 12077 | const bfd_byte *data) |
| 12078 | { |
| 12079 | struct breakpoint *bp; |
| 12080 | |
| 12081 | ALL_BREAKPOINTS (bp) |
| 12082 | if (bp->enable_state == bp_enabled |
| 12083 | && bp->type == bp_hardware_watchpoint |
| 12084 | && bp->val_valid && bp->val) |
| 12085 | { |
| 12086 | struct bp_location *loc; |
| 12087 | |
| 12088 | for (loc = bp->loc; loc != NULL; loc = loc->next) |
| 12089 | if (loc->loc_type == bp_loc_hardware_watchpoint |
| 12090 | && loc->address + loc->length > addr |
| 12091 | && addr + len > loc->address) |
| 12092 | { |
| 12093 | value_free (bp->val); |
| 12094 | bp->val = NULL; |
| 12095 | bp->val_valid = 0; |
| 12096 | } |
| 12097 | } |
| 12098 | } |
| 12099 | |
| 12100 | /* Use default_breakpoint_'s, or nothing if they aren't valid. */ |
| 12101 | |
| 12102 | struct symtabs_and_lines |
| 12103 | decode_line_spec_1 (char *string, int funfirstline) |
| 12104 | { |
| 12105 | struct symtabs_and_lines sals; |
| 12106 | |
| 12107 | if (string == 0) |
| 12108 | error (_("Empty line specification.")); |
| 12109 | if (default_breakpoint_valid) |
| 12110 | sals = decode_line_1 (&string, funfirstline, |
| 12111 | default_breakpoint_symtab, |
| 12112 | default_breakpoint_line, |
| 12113 | NULL); |
| 12114 | else |
| 12115 | sals = decode_line_1 (&string, funfirstline, |
| 12116 | (struct symtab *) NULL, 0, NULL); |
| 12117 | if (*string) |
| 12118 | error (_("Junk at end of line specification: %s"), string); |
| 12119 | return sals; |
| 12120 | } |
| 12121 | |
| 12122 | /* Create and insert a raw software breakpoint at PC. Return an |
| 12123 | identifier, which should be used to remove the breakpoint later. |
| 12124 | In general, places which call this should be using something on the |
| 12125 | breakpoint chain instead; this function should be eliminated |
| 12126 | someday. */ |
| 12127 | |
| 12128 | void * |
| 12129 | deprecated_insert_raw_breakpoint (struct gdbarch *gdbarch, |
| 12130 | struct address_space *aspace, CORE_ADDR pc) |
| 12131 | { |
| 12132 | struct bp_target_info *bp_tgt; |
| 12133 | |
| 12134 | bp_tgt = XZALLOC (struct bp_target_info); |
| 12135 | |
| 12136 | bp_tgt->placed_address_space = aspace; |
| 12137 | bp_tgt->placed_address = pc; |
| 12138 | |
| 12139 | if (target_insert_breakpoint (gdbarch, bp_tgt) != 0) |
| 12140 | { |
| 12141 | /* Could not insert the breakpoint. */ |
| 12142 | xfree (bp_tgt); |
| 12143 | return NULL; |
| 12144 | } |
| 12145 | |
| 12146 | return bp_tgt; |
| 12147 | } |
| 12148 | |
| 12149 | /* Remove a breakpoint BP inserted by |
| 12150 | deprecated_insert_raw_breakpoint. */ |
| 12151 | |
| 12152 | int |
| 12153 | deprecated_remove_raw_breakpoint (struct gdbarch *gdbarch, void *bp) |
| 12154 | { |
| 12155 | struct bp_target_info *bp_tgt = bp; |
| 12156 | int ret; |
| 12157 | |
| 12158 | ret = target_remove_breakpoint (gdbarch, bp_tgt); |
| 12159 | xfree (bp_tgt); |
| 12160 | |
| 12161 | return ret; |
| 12162 | } |
| 12163 | |
| 12164 | /* One (or perhaps two) breakpoints used for software single |
| 12165 | stepping. */ |
| 12166 | |
| 12167 | static void *single_step_breakpoints[2]; |
| 12168 | static struct gdbarch *single_step_gdbarch[2]; |
| 12169 | |
| 12170 | /* Create and insert a breakpoint for software single step. */ |
| 12171 | |
| 12172 | void |
| 12173 | insert_single_step_breakpoint (struct gdbarch *gdbarch, |
| 12174 | struct address_space *aspace, |
| 12175 | CORE_ADDR next_pc) |
| 12176 | { |
| 12177 | void **bpt_p; |
| 12178 | |
| 12179 | if (single_step_breakpoints[0] == NULL) |
| 12180 | { |
| 12181 | bpt_p = &single_step_breakpoints[0]; |
| 12182 | single_step_gdbarch[0] = gdbarch; |
| 12183 | } |
| 12184 | else |
| 12185 | { |
| 12186 | gdb_assert (single_step_breakpoints[1] == NULL); |
| 12187 | bpt_p = &single_step_breakpoints[1]; |
| 12188 | single_step_gdbarch[1] = gdbarch; |
| 12189 | } |
| 12190 | |
| 12191 | /* NOTE drow/2006-04-11: A future improvement to this function would |
| 12192 | be to only create the breakpoints once, and actually put them on |
| 12193 | the breakpoint chain. That would let us use set_raw_breakpoint. |
| 12194 | We could adjust the addresses each time they were needed. Doing |
| 12195 | this requires corresponding changes elsewhere where single step |
| 12196 | breakpoints are handled, however. So, for now, we use this. */ |
| 12197 | |
| 12198 | *bpt_p = deprecated_insert_raw_breakpoint (gdbarch, aspace, next_pc); |
| 12199 | if (*bpt_p == NULL) |
| 12200 | error (_("Could not insert single-step breakpoint at %s"), |
| 12201 | paddress (gdbarch, next_pc)); |
| 12202 | } |
| 12203 | |
| 12204 | /* Check if the breakpoints used for software single stepping |
| 12205 | were inserted or not. */ |
| 12206 | |
| 12207 | int |
| 12208 | single_step_breakpoints_inserted (void) |
| 12209 | { |
| 12210 | return (single_step_breakpoints[0] != NULL |
| 12211 | || single_step_breakpoints[1] != NULL); |
| 12212 | } |
| 12213 | |
| 12214 | /* Remove and delete any breakpoints used for software single step. */ |
| 12215 | |
| 12216 | void |
| 12217 | remove_single_step_breakpoints (void) |
| 12218 | { |
| 12219 | gdb_assert (single_step_breakpoints[0] != NULL); |
| 12220 | |
| 12221 | /* See insert_single_step_breakpoint for more about this deprecated |
| 12222 | call. */ |
| 12223 | deprecated_remove_raw_breakpoint (single_step_gdbarch[0], |
| 12224 | single_step_breakpoints[0]); |
| 12225 | single_step_gdbarch[0] = NULL; |
| 12226 | single_step_breakpoints[0] = NULL; |
| 12227 | |
| 12228 | if (single_step_breakpoints[1] != NULL) |
| 12229 | { |
| 12230 | deprecated_remove_raw_breakpoint (single_step_gdbarch[1], |
| 12231 | single_step_breakpoints[1]); |
| 12232 | single_step_gdbarch[1] = NULL; |
| 12233 | single_step_breakpoints[1] = NULL; |
| 12234 | } |
| 12235 | } |
| 12236 | |
| 12237 | /* Delete software single step breakpoints without removing them from |
| 12238 | the inferior. This is intended to be used if the inferior's address |
| 12239 | space where they were inserted is already gone, e.g. after exit or |
| 12240 | exec. */ |
| 12241 | |
| 12242 | void |
| 12243 | cancel_single_step_breakpoints (void) |
| 12244 | { |
| 12245 | int i; |
| 12246 | |
| 12247 | for (i = 0; i < 2; i++) |
| 12248 | if (single_step_breakpoints[i]) |
| 12249 | { |
| 12250 | xfree (single_step_breakpoints[i]); |
| 12251 | single_step_breakpoints[i] = NULL; |
| 12252 | single_step_gdbarch[i] = NULL; |
| 12253 | } |
| 12254 | } |
| 12255 | |
| 12256 | /* Detach software single-step breakpoints from INFERIOR_PTID without |
| 12257 | removing them. */ |
| 12258 | |
| 12259 | static void |
| 12260 | detach_single_step_breakpoints (void) |
| 12261 | { |
| 12262 | int i; |
| 12263 | |
| 12264 | for (i = 0; i < 2; i++) |
| 12265 | if (single_step_breakpoints[i]) |
| 12266 | target_remove_breakpoint (single_step_gdbarch[i], |
| 12267 | single_step_breakpoints[i]); |
| 12268 | } |
| 12269 | |
| 12270 | /* Check whether a software single-step breakpoint is inserted at |
| 12271 | PC. */ |
| 12272 | |
| 12273 | static int |
| 12274 | single_step_breakpoint_inserted_here_p (struct address_space *aspace, |
| 12275 | CORE_ADDR pc) |
| 12276 | { |
| 12277 | int i; |
| 12278 | |
| 12279 | for (i = 0; i < 2; i++) |
| 12280 | { |
| 12281 | struct bp_target_info *bp_tgt = single_step_breakpoints[i]; |
| 12282 | if (bp_tgt |
| 12283 | && breakpoint_address_match (bp_tgt->placed_address_space, |
| 12284 | bp_tgt->placed_address, |
| 12285 | aspace, pc)) |
| 12286 | return 1; |
| 12287 | } |
| 12288 | |
| 12289 | return 0; |
| 12290 | } |
| 12291 | |
| 12292 | /* Returns 0 if 'bp' is NOT a syscall catchpoint, |
| 12293 | non-zero otherwise. */ |
| 12294 | static int |
| 12295 | is_syscall_catchpoint_enabled (struct breakpoint *bp) |
| 12296 | { |
| 12297 | if (syscall_catchpoint_p (bp) |
| 12298 | && bp->enable_state != bp_disabled |
| 12299 | && bp->enable_state != bp_call_disabled) |
| 12300 | return 1; |
| 12301 | else |
| 12302 | return 0; |
| 12303 | } |
| 12304 | |
| 12305 | int |
| 12306 | catch_syscall_enabled (void) |
| 12307 | { |
| 12308 | struct inferior *inf = current_inferior (); |
| 12309 | |
| 12310 | return inf->total_syscalls_count != 0; |
| 12311 | } |
| 12312 | |
| 12313 | int |
| 12314 | catching_syscall_number (int syscall_number) |
| 12315 | { |
| 12316 | struct breakpoint *bp; |
| 12317 | |
| 12318 | ALL_BREAKPOINTS (bp) |
| 12319 | if (is_syscall_catchpoint_enabled (bp)) |
| 12320 | { |
| 12321 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bp; |
| 12322 | |
| 12323 | if (c->syscalls_to_be_caught) |
| 12324 | { |
| 12325 | int i, iter; |
| 12326 | for (i = 0; |
| 12327 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 12328 | i++) |
| 12329 | if (syscall_number == iter) |
| 12330 | return 1; |
| 12331 | } |
| 12332 | else |
| 12333 | return 1; |
| 12334 | } |
| 12335 | |
| 12336 | return 0; |
| 12337 | } |
| 12338 | |
| 12339 | /* Complete syscall names. Used by "catch syscall". */ |
| 12340 | static char ** |
| 12341 | catch_syscall_completer (struct cmd_list_element *cmd, |
| 12342 | char *text, char *word) |
| 12343 | { |
| 12344 | const char **list = get_syscall_names (); |
| 12345 | char **retlist |
| 12346 | = (list == NULL) ? NULL : complete_on_enum (list, text, word); |
| 12347 | |
| 12348 | xfree (list); |
| 12349 | return retlist; |
| 12350 | } |
| 12351 | |
| 12352 | /* Tracepoint-specific operations. */ |
| 12353 | |
| 12354 | /* Set tracepoint count to NUM. */ |
| 12355 | static void |
| 12356 | set_tracepoint_count (int num) |
| 12357 | { |
| 12358 | tracepoint_count = num; |
| 12359 | set_internalvar_integer (lookup_internalvar ("tpnum"), num); |
| 12360 | } |
| 12361 | |
| 12362 | void |
| 12363 | trace_command (char *arg, int from_tty) |
| 12364 | { |
| 12365 | if (create_breakpoint (get_current_arch (), |
| 12366 | arg, |
| 12367 | NULL, 0, 1 /* parse arg */, |
| 12368 | 0 /* tempflag */, |
| 12369 | bp_tracepoint /* type_wanted */, |
| 12370 | 0 /* Ignore count */, |
| 12371 | pending_break_support, |
| 12372 | NULL, |
| 12373 | from_tty, |
| 12374 | 1 /* enabled */, |
| 12375 | 0 /* internal */)) |
| 12376 | set_tracepoint_count (breakpoint_count); |
| 12377 | } |
| 12378 | |
| 12379 | void |
| 12380 | ftrace_command (char *arg, int from_tty) |
| 12381 | { |
| 12382 | if (create_breakpoint (get_current_arch (), |
| 12383 | arg, |
| 12384 | NULL, 0, 1 /* parse arg */, |
| 12385 | 0 /* tempflag */, |
| 12386 | bp_fast_tracepoint /* type_wanted */, |
| 12387 | 0 /* Ignore count */, |
| 12388 | pending_break_support, |
| 12389 | NULL, |
| 12390 | from_tty, |
| 12391 | 1 /* enabled */, |
| 12392 | 0 /* internal */)) |
| 12393 | set_tracepoint_count (breakpoint_count); |
| 12394 | } |
| 12395 | |
| 12396 | /* strace command implementation. Creates a static tracepoint. */ |
| 12397 | |
| 12398 | void |
| 12399 | strace_command (char *arg, int from_tty) |
| 12400 | { |
| 12401 | if (create_breakpoint (get_current_arch (), |
| 12402 | arg, |
| 12403 | NULL, 0, 1 /* parse arg */, |
| 12404 | 0 /* tempflag */, |
| 12405 | bp_static_tracepoint /* type_wanted */, |
| 12406 | 0 /* Ignore count */, |
| 12407 | pending_break_support, |
| 12408 | NULL, |
| 12409 | from_tty, |
| 12410 | 1 /* enabled */, |
| 12411 | 0 /* internal */)) |
| 12412 | set_tracepoint_count (breakpoint_count); |
| 12413 | } |
| 12414 | |
| 12415 | /* Set up a fake reader function that gets command lines from a linked |
| 12416 | list that was acquired during tracepoint uploading. */ |
| 12417 | |
| 12418 | static struct uploaded_tp *this_utp; |
| 12419 | static int next_cmd; |
| 12420 | |
| 12421 | static char * |
| 12422 | read_uploaded_action (void) |
| 12423 | { |
| 12424 | char *rslt; |
| 12425 | |
| 12426 | VEC_iterate (char_ptr, this_utp->cmd_strings, next_cmd, rslt); |
| 12427 | |
| 12428 | next_cmd++; |
| 12429 | |
| 12430 | return rslt; |
| 12431 | } |
| 12432 | |
| 12433 | /* Given information about a tracepoint as recorded on a target (which |
| 12434 | can be either a live system or a trace file), attempt to create an |
| 12435 | equivalent GDB tracepoint. This is not a reliable process, since |
| 12436 | the target does not necessarily have all the information used when |
| 12437 | the tracepoint was originally defined. */ |
| 12438 | |
| 12439 | struct breakpoint * |
| 12440 | create_tracepoint_from_upload (struct uploaded_tp *utp) |
| 12441 | { |
| 12442 | char *addr_str, small_buf[100]; |
| 12443 | struct breakpoint *tp; |
| 12444 | |
| 12445 | if (utp->at_string) |
| 12446 | addr_str = utp->at_string; |
| 12447 | else |
| 12448 | { |
| 12449 | /* In the absence of a source location, fall back to raw |
| 12450 | address. Since there is no way to confirm that the address |
| 12451 | means the same thing as when the trace was started, warn the |
| 12452 | user. */ |
| 12453 | warning (_("Uploaded tracepoint %d has no " |
| 12454 | "source location, using raw address"), |
| 12455 | utp->number); |
| 12456 | sprintf (small_buf, "*%s", hex_string (utp->addr)); |
| 12457 | addr_str = small_buf; |
| 12458 | } |
| 12459 | |
| 12460 | /* There's not much we can do with a sequence of bytecodes. */ |
| 12461 | if (utp->cond && !utp->cond_string) |
| 12462 | warning (_("Uploaded tracepoint %d condition " |
| 12463 | "has no source form, ignoring it"), |
| 12464 | utp->number); |
| 12465 | |
| 12466 | if (!create_breakpoint (get_current_arch (), |
| 12467 | addr_str, |
| 12468 | utp->cond_string, -1, 0 /* parse cond/thread */, |
| 12469 | 0 /* tempflag */, |
| 12470 | utp->type /* type_wanted */, |
| 12471 | 0 /* Ignore count */, |
| 12472 | pending_break_support, |
| 12473 | NULL, |
| 12474 | 0 /* from_tty */, |
| 12475 | utp->enabled /* enabled */, |
| 12476 | 0 /* internal */)) |
| 12477 | return NULL; |
| 12478 | |
| 12479 | set_tracepoint_count (breakpoint_count); |
| 12480 | |
| 12481 | /* Get the tracepoint we just created. */ |
| 12482 | tp = get_tracepoint (tracepoint_count); |
| 12483 | gdb_assert (tp != NULL); |
| 12484 | |
| 12485 | if (utp->pass > 0) |
| 12486 | { |
| 12487 | sprintf (small_buf, "%d %d", utp->pass, tp->number); |
| 12488 | |
| 12489 | trace_pass_command (small_buf, 0); |
| 12490 | } |
| 12491 | |
| 12492 | /* If we have uploaded versions of the original commands, set up a |
| 12493 | special-purpose "reader" function and call the usual command line |
| 12494 | reader, then pass the result to the breakpoint command-setting |
| 12495 | function. */ |
| 12496 | if (!VEC_empty (char_ptr, utp->cmd_strings)) |
| 12497 | { |
| 12498 | struct command_line *cmd_list; |
| 12499 | |
| 12500 | this_utp = utp; |
| 12501 | next_cmd = 0; |
| 12502 | |
| 12503 | cmd_list = read_command_lines_1 (read_uploaded_action, 1, NULL, NULL); |
| 12504 | |
| 12505 | breakpoint_set_commands (tp, cmd_list); |
| 12506 | } |
| 12507 | else if (!VEC_empty (char_ptr, utp->actions) |
| 12508 | || !VEC_empty (char_ptr, utp->step_actions)) |
| 12509 | warning (_("Uploaded tracepoint %d actions " |
| 12510 | "have no source form, ignoring them"), |
| 12511 | utp->number); |
| 12512 | |
| 12513 | return tp; |
| 12514 | } |
| 12515 | |
| 12516 | /* Print information on tracepoint number TPNUM_EXP, or all if |
| 12517 | omitted. */ |
| 12518 | |
| 12519 | static void |
| 12520 | tracepoints_info (char *args, int from_tty) |
| 12521 | { |
| 12522 | int num_printed; |
| 12523 | |
| 12524 | num_printed = breakpoint_1 (args, 0, is_tracepoint); |
| 12525 | |
| 12526 | if (num_printed == 0) |
| 12527 | { |
| 12528 | if (args == NULL || *args == '\0') |
| 12529 | ui_out_message (uiout, 0, "No tracepoints.\n"); |
| 12530 | else |
| 12531 | ui_out_message (uiout, 0, "No tracepoint matching '%s'.\n", args); |
| 12532 | } |
| 12533 | |
| 12534 | default_collect_info (); |
| 12535 | } |
| 12536 | |
| 12537 | /* The 'enable trace' command enables tracepoints. |
| 12538 | Not supported by all targets. */ |
| 12539 | static void |
| 12540 | enable_trace_command (char *args, int from_tty) |
| 12541 | { |
| 12542 | enable_command (args, from_tty); |
| 12543 | } |
| 12544 | |
| 12545 | /* The 'disable trace' command disables tracepoints. |
| 12546 | Not supported by all targets. */ |
| 12547 | static void |
| 12548 | disable_trace_command (char *args, int from_tty) |
| 12549 | { |
| 12550 | disable_command (args, from_tty); |
| 12551 | } |
| 12552 | |
| 12553 | /* Remove a tracepoint (or all if no argument). */ |
| 12554 | static void |
| 12555 | delete_trace_command (char *arg, int from_tty) |
| 12556 | { |
| 12557 | struct breakpoint *b, *b_tmp; |
| 12558 | |
| 12559 | dont_repeat (); |
| 12560 | |
| 12561 | if (arg == 0) |
| 12562 | { |
| 12563 | int breaks_to_delete = 0; |
| 12564 | |
| 12565 | /* Delete all breakpoints if no argument. |
| 12566 | Do not delete internal or call-dummy breakpoints, these |
| 12567 | have to be deleted with an explicit breakpoint number |
| 12568 | argument. */ |
| 12569 | ALL_TRACEPOINTS (b) |
| 12570 | if (is_tracepoint (b) && user_breakpoint_p (b)) |
| 12571 | { |
| 12572 | breaks_to_delete = 1; |
| 12573 | break; |
| 12574 | } |
| 12575 | |
| 12576 | /* Ask user only if there are some breakpoints to delete. */ |
| 12577 | if (!from_tty |
| 12578 | || (breaks_to_delete && query (_("Delete all tracepoints? ")))) |
| 12579 | { |
| 12580 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 12581 | if (is_tracepoint (b) && user_breakpoint_p (b)) |
| 12582 | delete_breakpoint (b); |
| 12583 | } |
| 12584 | } |
| 12585 | else |
| 12586 | map_breakpoint_numbers (arg, do_map_delete_breakpoint, NULL); |
| 12587 | } |
| 12588 | |
| 12589 | /* Helper function for trace_pass_command. */ |
| 12590 | |
| 12591 | static void |
| 12592 | trace_pass_set_count (struct breakpoint *bp, int count, int from_tty) |
| 12593 | { |
| 12594 | bp->pass_count = count; |
| 12595 | observer_notify_tracepoint_modified (bp->number); |
| 12596 | if (from_tty) |
| 12597 | printf_filtered (_("Setting tracepoint %d's passcount to %d\n"), |
| 12598 | bp->number, count); |
| 12599 | } |
| 12600 | |
| 12601 | /* Set passcount for tracepoint. |
| 12602 | |
| 12603 | First command argument is passcount, second is tracepoint number. |
| 12604 | If tracepoint number omitted, apply to most recently defined. |
| 12605 | Also accepts special argument "all". */ |
| 12606 | |
| 12607 | static void |
| 12608 | trace_pass_command (char *args, int from_tty) |
| 12609 | { |
| 12610 | struct breakpoint *t1; |
| 12611 | unsigned int count; |
| 12612 | |
| 12613 | if (args == 0 || *args == 0) |
| 12614 | error (_("passcount command requires an " |
| 12615 | "argument (count + optional TP num)")); |
| 12616 | |
| 12617 | count = strtoul (args, &args, 10); /* Count comes first, then TP num. */ |
| 12618 | |
| 12619 | while (*args && isspace ((int) *args)) |
| 12620 | args++; |
| 12621 | |
| 12622 | if (*args && strncasecmp (args, "all", 3) == 0) |
| 12623 | { |
| 12624 | args += 3; /* Skip special argument "all". */ |
| 12625 | if (*args) |
| 12626 | error (_("Junk at end of arguments.")); |
| 12627 | |
| 12628 | ALL_TRACEPOINTS (t1) |
| 12629 | { |
| 12630 | trace_pass_set_count (t1, count, from_tty); |
| 12631 | } |
| 12632 | } |
| 12633 | else if (*args == '\0') |
| 12634 | { |
| 12635 | t1 = get_tracepoint_by_number (&args, NULL, 1); |
| 12636 | if (t1) |
| 12637 | trace_pass_set_count (t1, count, from_tty); |
| 12638 | } |
| 12639 | else |
| 12640 | { |
| 12641 | struct get_number_or_range_state state; |
| 12642 | |
| 12643 | init_number_or_range (&state, args); |
| 12644 | while (!state.finished) |
| 12645 | { |
| 12646 | t1 = get_tracepoint_by_number (&args, &state, 1); |
| 12647 | if (t1) |
| 12648 | trace_pass_set_count (t1, count, from_tty); |
| 12649 | } |
| 12650 | } |
| 12651 | } |
| 12652 | |
| 12653 | struct breakpoint * |
| 12654 | get_tracepoint (int num) |
| 12655 | { |
| 12656 | struct breakpoint *t; |
| 12657 | |
| 12658 | ALL_TRACEPOINTS (t) |
| 12659 | if (t->number == num) |
| 12660 | return t; |
| 12661 | |
| 12662 | return NULL; |
| 12663 | } |
| 12664 | |
| 12665 | /* Find the tracepoint with the given target-side number (which may be |
| 12666 | different from the tracepoint number after disconnecting and |
| 12667 | reconnecting). */ |
| 12668 | |
| 12669 | struct breakpoint * |
| 12670 | get_tracepoint_by_number_on_target (int num) |
| 12671 | { |
| 12672 | struct breakpoint *t; |
| 12673 | |
| 12674 | ALL_TRACEPOINTS (t) |
| 12675 | if (t->number_on_target == num) |
| 12676 | return t; |
| 12677 | |
| 12678 | return NULL; |
| 12679 | } |
| 12680 | |
| 12681 | /* Utility: parse a tracepoint number and look it up in the list. |
| 12682 | If STATE is not NULL, use, get_number_or_range_state and ignore ARG. |
| 12683 | If OPTIONAL_P is true, then if the argument is missing, the most |
| 12684 | recent tracepoint (tracepoint_count) is returned. */ |
| 12685 | struct breakpoint * |
| 12686 | get_tracepoint_by_number (char **arg, |
| 12687 | struct get_number_or_range_state *state, |
| 12688 | int optional_p) |
| 12689 | { |
| 12690 | extern int tracepoint_count; |
| 12691 | struct breakpoint *t; |
| 12692 | int tpnum; |
| 12693 | char *instring = arg == NULL ? NULL : *arg; |
| 12694 | |
| 12695 | if (state) |
| 12696 | { |
| 12697 | gdb_assert (!state->finished); |
| 12698 | tpnum = get_number_or_range (state); |
| 12699 | } |
| 12700 | else if (arg == NULL || *arg == NULL || ! **arg) |
| 12701 | { |
| 12702 | if (optional_p) |
| 12703 | tpnum = tracepoint_count; |
| 12704 | else |
| 12705 | error_no_arg (_("tracepoint number")); |
| 12706 | } |
| 12707 | else |
| 12708 | tpnum = get_number (arg); |
| 12709 | |
| 12710 | if (tpnum <= 0) |
| 12711 | { |
| 12712 | if (instring && *instring) |
| 12713 | printf_filtered (_("bad tracepoint number at or near '%s'\n"), |
| 12714 | instring); |
| 12715 | else |
| 12716 | printf_filtered (_("Tracepoint argument missing " |
| 12717 | "and no previous tracepoint\n")); |
| 12718 | return NULL; |
| 12719 | } |
| 12720 | |
| 12721 | ALL_TRACEPOINTS (t) |
| 12722 | if (t->number == tpnum) |
| 12723 | { |
| 12724 | return t; |
| 12725 | } |
| 12726 | |
| 12727 | printf_unfiltered ("No tracepoint number %d.\n", tpnum); |
| 12728 | return NULL; |
| 12729 | } |
| 12730 | |
| 12731 | /* Save information on user settable breakpoints (watchpoints, etc) to |
| 12732 | a new script file named FILENAME. If FILTER is non-NULL, call it |
| 12733 | on each breakpoint and only include the ones for which it returns |
| 12734 | non-zero. */ |
| 12735 | |
| 12736 | static void |
| 12737 | save_breakpoints (char *filename, int from_tty, |
| 12738 | int (*filter) (const struct breakpoint *)) |
| 12739 | { |
| 12740 | struct breakpoint *tp; |
| 12741 | int any = 0; |
| 12742 | char *pathname; |
| 12743 | struct cleanup *cleanup; |
| 12744 | struct ui_file *fp; |
| 12745 | int extra_trace_bits = 0; |
| 12746 | |
| 12747 | if (filename == 0 || *filename == 0) |
| 12748 | error (_("Argument required (file name in which to save)")); |
| 12749 | |
| 12750 | /* See if we have anything to save. */ |
| 12751 | ALL_BREAKPOINTS (tp) |
| 12752 | { |
| 12753 | /* Skip internal and momentary breakpoints. */ |
| 12754 | if (!user_breakpoint_p (tp)) |
| 12755 | continue; |
| 12756 | |
| 12757 | /* If we have a filter, only save the breakpoints it accepts. */ |
| 12758 | if (filter && !filter (tp)) |
| 12759 | continue; |
| 12760 | |
| 12761 | any = 1; |
| 12762 | |
| 12763 | if (is_tracepoint (tp)) |
| 12764 | { |
| 12765 | extra_trace_bits = 1; |
| 12766 | |
| 12767 | /* We can stop searching. */ |
| 12768 | break; |
| 12769 | } |
| 12770 | } |
| 12771 | |
| 12772 | if (!any) |
| 12773 | { |
| 12774 | warning (_("Nothing to save.")); |
| 12775 | return; |
| 12776 | } |
| 12777 | |
| 12778 | pathname = tilde_expand (filename); |
| 12779 | cleanup = make_cleanup (xfree, pathname); |
| 12780 | fp = gdb_fopen (pathname, "w"); |
| 12781 | if (!fp) |
| 12782 | error (_("Unable to open file '%s' for saving (%s)"), |
| 12783 | filename, safe_strerror (errno)); |
| 12784 | make_cleanup_ui_file_delete (fp); |
| 12785 | |
| 12786 | if (extra_trace_bits) |
| 12787 | save_trace_state_variables (fp); |
| 12788 | |
| 12789 | ALL_BREAKPOINTS (tp) |
| 12790 | { |
| 12791 | /* Skip internal and momentary breakpoints. */ |
| 12792 | if (!user_breakpoint_p (tp)) |
| 12793 | continue; |
| 12794 | |
| 12795 | /* If we have a filter, only save the breakpoints it accepts. */ |
| 12796 | if (filter && !filter (tp)) |
| 12797 | continue; |
| 12798 | |
| 12799 | if (tp->ops != NULL && tp->ops->print_recreate != NULL) |
| 12800 | (tp->ops->print_recreate) (tp, fp); |
| 12801 | else |
| 12802 | { |
| 12803 | if (tp->type == bp_fast_tracepoint) |
| 12804 | fprintf_unfiltered (fp, "ftrace"); |
| 12805 | if (tp->type == bp_static_tracepoint) |
| 12806 | fprintf_unfiltered (fp, "strace"); |
| 12807 | else if (tp->type == bp_tracepoint) |
| 12808 | fprintf_unfiltered (fp, "trace"); |
| 12809 | else if (tp->type == bp_breakpoint && tp->disposition == disp_del) |
| 12810 | fprintf_unfiltered (fp, "tbreak"); |
| 12811 | else if (tp->type == bp_breakpoint) |
| 12812 | fprintf_unfiltered (fp, "break"); |
| 12813 | else if (tp->type == bp_hardware_breakpoint |
| 12814 | && tp->disposition == disp_del) |
| 12815 | fprintf_unfiltered (fp, "thbreak"); |
| 12816 | else if (tp->type == bp_hardware_breakpoint) |
| 12817 | fprintf_unfiltered (fp, "hbreak"); |
| 12818 | else if (tp->type == bp_watchpoint) |
| 12819 | fprintf_unfiltered (fp, "watch"); |
| 12820 | else if (tp->type == bp_hardware_watchpoint) |
| 12821 | fprintf_unfiltered (fp, "watch"); |
| 12822 | else if (tp->type == bp_read_watchpoint) |
| 12823 | fprintf_unfiltered (fp, "rwatch"); |
| 12824 | else if (tp->type == bp_access_watchpoint) |
| 12825 | fprintf_unfiltered (fp, "awatch"); |
| 12826 | else |
| 12827 | internal_error (__FILE__, __LINE__, |
| 12828 | _("unhandled breakpoint type %d"), (int) tp->type); |
| 12829 | |
| 12830 | if (tp->exp_string) |
| 12831 | fprintf_unfiltered (fp, " %s", tp->exp_string); |
| 12832 | else if (tp->addr_string) |
| 12833 | fprintf_unfiltered (fp, " %s", tp->addr_string); |
| 12834 | else |
| 12835 | { |
| 12836 | char tmp[40]; |
| 12837 | |
| 12838 | sprintf_vma (tmp, tp->loc->address); |
| 12839 | fprintf_unfiltered (fp, " *0x%s", tmp); |
| 12840 | } |
| 12841 | } |
| 12842 | |
| 12843 | if (tp->thread != -1) |
| 12844 | fprintf_unfiltered (fp, " thread %d", tp->thread); |
| 12845 | |
| 12846 | if (tp->task != 0) |
| 12847 | fprintf_unfiltered (fp, " task %d", tp->task); |
| 12848 | |
| 12849 | fprintf_unfiltered (fp, "\n"); |
| 12850 | |
| 12851 | /* Note, we can't rely on tp->number for anything, as we can't |
| 12852 | assume the recreated breakpoint numbers will match. Use $bpnum |
| 12853 | instead. */ |
| 12854 | |
| 12855 | if (tp->cond_string) |
| 12856 | fprintf_unfiltered (fp, " condition $bpnum %s\n", tp->cond_string); |
| 12857 | |
| 12858 | if (tp->ignore_count) |
| 12859 | fprintf_unfiltered (fp, " ignore $bpnum %d\n", tp->ignore_count); |
| 12860 | |
| 12861 | if (tp->pass_count) |
| 12862 | fprintf_unfiltered (fp, " passcount %d\n", tp->pass_count); |
| 12863 | |
| 12864 | if (tp->commands) |
| 12865 | { |
| 12866 | volatile struct gdb_exception ex; |
| 12867 | |
| 12868 | fprintf_unfiltered (fp, " commands\n"); |
| 12869 | |
| 12870 | ui_out_redirect (uiout, fp); |
| 12871 | TRY_CATCH (ex, RETURN_MASK_ALL) |
| 12872 | { |
| 12873 | print_command_lines (uiout, tp->commands->commands, 2); |
| 12874 | } |
| 12875 | ui_out_redirect (uiout, NULL); |
| 12876 | |
| 12877 | if (ex.reason < 0) |
| 12878 | throw_exception (ex); |
| 12879 | |
| 12880 | fprintf_unfiltered (fp, " end\n"); |
| 12881 | } |
| 12882 | |
| 12883 | if (tp->enable_state == bp_disabled) |
| 12884 | fprintf_unfiltered (fp, "disable\n"); |
| 12885 | |
| 12886 | /* If this is a multi-location breakpoint, check if the locations |
| 12887 | should be individually disabled. Watchpoint locations are |
| 12888 | special, and not user visible. */ |
| 12889 | if (!is_watchpoint (tp) && tp->loc && tp->loc->next) |
| 12890 | { |
| 12891 | struct bp_location *loc; |
| 12892 | int n = 1; |
| 12893 | |
| 12894 | for (loc = tp->loc; loc != NULL; loc = loc->next, n++) |
| 12895 | if (!loc->enabled) |
| 12896 | fprintf_unfiltered (fp, "disable $bpnum.%d\n", n); |
| 12897 | } |
| 12898 | } |
| 12899 | |
| 12900 | if (extra_trace_bits && *default_collect) |
| 12901 | fprintf_unfiltered (fp, "set default-collect %s\n", default_collect); |
| 12902 | |
| 12903 | do_cleanups (cleanup); |
| 12904 | if (from_tty) |
| 12905 | printf_filtered (_("Saved to file '%s'.\n"), filename); |
| 12906 | } |
| 12907 | |
| 12908 | /* The `save breakpoints' command. */ |
| 12909 | |
| 12910 | static void |
| 12911 | save_breakpoints_command (char *args, int from_tty) |
| 12912 | { |
| 12913 | save_breakpoints (args, from_tty, NULL); |
| 12914 | } |
| 12915 | |
| 12916 | /* The `save tracepoints' command. */ |
| 12917 | |
| 12918 | static void |
| 12919 | save_tracepoints_command (char *args, int from_tty) |
| 12920 | { |
| 12921 | save_breakpoints (args, from_tty, is_tracepoint); |
| 12922 | } |
| 12923 | |
| 12924 | /* Create a vector of all tracepoints. */ |
| 12925 | |
| 12926 | VEC(breakpoint_p) * |
| 12927 | all_tracepoints (void) |
| 12928 | { |
| 12929 | VEC(breakpoint_p) *tp_vec = 0; |
| 12930 | struct breakpoint *tp; |
| 12931 | |
| 12932 | ALL_TRACEPOINTS (tp) |
| 12933 | { |
| 12934 | VEC_safe_push (breakpoint_p, tp_vec, tp); |
| 12935 | } |
| 12936 | |
| 12937 | return tp_vec; |
| 12938 | } |
| 12939 | |
| 12940 | \f |
| 12941 | /* This help string is used for the break, hbreak, tbreak and thbreak |
| 12942 | commands. It is defined as a macro to prevent duplication. |
| 12943 | COMMAND should be a string constant containing the name of the |
| 12944 | command. */ |
| 12945 | #define BREAK_ARGS_HELP(command) \ |
| 12946 | command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\ |
| 12947 | LOCATION may be a line number, function name, or \"*\" and an address.\n\ |
| 12948 | If a line number is specified, break at start of code for that line.\n\ |
| 12949 | If a function is specified, break at start of code for that function.\n\ |
| 12950 | If an address is specified, break at that exact address.\n\ |
| 12951 | With no LOCATION, uses current execution address of the selected\n\ |
| 12952 | stack frame. This is useful for breaking on return to a stack frame.\n\ |
| 12953 | \n\ |
| 12954 | THREADNUM is the number from \"info threads\".\n\ |
| 12955 | CONDITION is a boolean expression.\n\ |
| 12956 | \n\ |
| 12957 | Multiple breakpoints at one place are permitted, and useful if their\n\ |
| 12958 | conditions are different.\n\ |
| 12959 | \n\ |
| 12960 | Do \"help breakpoints\" for info on other commands dealing with breakpoints." |
| 12961 | |
| 12962 | /* List of subcommands for "catch". */ |
| 12963 | static struct cmd_list_element *catch_cmdlist; |
| 12964 | |
| 12965 | /* List of subcommands for "tcatch". */ |
| 12966 | static struct cmd_list_element *tcatch_cmdlist; |
| 12967 | |
| 12968 | /* Like add_cmd, but add the command to both the "catch" and "tcatch" |
| 12969 | lists, and pass some additional user data to the command function. */ |
| 12970 | static void |
| 12971 | add_catch_command (char *name, char *docstring, |
| 12972 | void (*sfunc) (char *args, int from_tty, |
| 12973 | struct cmd_list_element *command), |
| 12974 | char **(*completer) (struct cmd_list_element *cmd, |
| 12975 | char *text, char *word), |
| 12976 | void *user_data_catch, |
| 12977 | void *user_data_tcatch) |
| 12978 | { |
| 12979 | struct cmd_list_element *command; |
| 12980 | |
| 12981 | command = add_cmd (name, class_breakpoint, NULL, docstring, |
| 12982 | &catch_cmdlist); |
| 12983 | set_cmd_sfunc (command, sfunc); |
| 12984 | set_cmd_context (command, user_data_catch); |
| 12985 | set_cmd_completer (command, completer); |
| 12986 | |
| 12987 | command = add_cmd (name, class_breakpoint, NULL, docstring, |
| 12988 | &tcatch_cmdlist); |
| 12989 | set_cmd_sfunc (command, sfunc); |
| 12990 | set_cmd_context (command, user_data_tcatch); |
| 12991 | set_cmd_completer (command, completer); |
| 12992 | } |
| 12993 | |
| 12994 | static void |
| 12995 | clear_syscall_counts (struct inferior *inf) |
| 12996 | { |
| 12997 | inf->total_syscalls_count = 0; |
| 12998 | inf->any_syscall_count = 0; |
| 12999 | VEC_free (int, inf->syscalls_counts); |
| 13000 | } |
| 13001 | |
| 13002 | static void |
| 13003 | save_command (char *arg, int from_tty) |
| 13004 | { |
| 13005 | printf_unfiltered (_("\"save\" must be followed by " |
| 13006 | "the name of a save subcommand.\n")); |
| 13007 | help_list (save_cmdlist, "save ", -1, gdb_stdout); |
| 13008 | } |
| 13009 | |
| 13010 | struct breakpoint * |
| 13011 | iterate_over_breakpoints (int (*callback) (struct breakpoint *, void *), |
| 13012 | void *data) |
| 13013 | { |
| 13014 | struct breakpoint *b, *b_tmp; |
| 13015 | |
| 13016 | ALL_BREAKPOINTS_SAFE (b, b_tmp) |
| 13017 | { |
| 13018 | if ((*callback) (b, data)) |
| 13019 | return b; |
| 13020 | } |
| 13021 | |
| 13022 | return NULL; |
| 13023 | } |
| 13024 | |
| 13025 | void |
| 13026 | _initialize_breakpoint (void) |
| 13027 | { |
| 13028 | struct cmd_list_element *c; |
| 13029 | |
| 13030 | observer_attach_solib_unloaded (disable_breakpoints_in_unloaded_shlib); |
| 13031 | observer_attach_inferior_exit (clear_syscall_counts); |
| 13032 | observer_attach_memory_changed (invalidate_bp_value_on_memory_change); |
| 13033 | |
| 13034 | breakpoint_objfile_key = register_objfile_data (); |
| 13035 | |
| 13036 | breakpoint_chain = 0; |
| 13037 | /* Don't bother to call set_breakpoint_count. $bpnum isn't useful |
| 13038 | before a breakpoint is set. */ |
| 13039 | breakpoint_count = 0; |
| 13040 | |
| 13041 | tracepoint_count = 0; |
| 13042 | |
| 13043 | add_com ("ignore", class_breakpoint, ignore_command, _("\ |
| 13044 | Set ignore-count of breakpoint number N to COUNT.\n\ |
| 13045 | Usage is `ignore N COUNT'.")); |
| 13046 | if (xdb_commands) |
| 13047 | add_com_alias ("bc", "ignore", class_breakpoint, 1); |
| 13048 | |
| 13049 | add_com ("commands", class_breakpoint, commands_command, _("\ |
| 13050 | Set commands to be executed when a breakpoint is hit.\n\ |
| 13051 | Give breakpoint number as argument after \"commands\".\n\ |
| 13052 | With no argument, the targeted breakpoint is the last one set.\n\ |
| 13053 | The commands themselves follow starting on the next line.\n\ |
| 13054 | Type a line containing \"end\" to indicate the end of them.\n\ |
| 13055 | Give \"silent\" as the first line to make the breakpoint silent;\n\ |
| 13056 | then no output is printed when it is hit, except what the commands print.")); |
| 13057 | |
| 13058 | add_com ("condition", class_breakpoint, condition_command, _("\ |
| 13059 | Specify breakpoint number N to break only if COND is true.\n\ |
| 13060 | Usage is `condition N COND', where N is an integer and COND is an\n\ |
| 13061 | expression to be evaluated whenever breakpoint N is reached.")); |
| 13062 | |
| 13063 | c = add_com ("tbreak", class_breakpoint, tbreak_command, _("\ |
| 13064 | Set a temporary breakpoint.\n\ |
| 13065 | Like \"break\" except the breakpoint is only temporary,\n\ |
| 13066 | so it will be deleted when hit. Equivalent to \"break\" followed\n\ |
| 13067 | by using \"enable delete\" on the breakpoint number.\n\ |
| 13068 | \n" |
| 13069 | BREAK_ARGS_HELP ("tbreak"))); |
| 13070 | set_cmd_completer (c, location_completer); |
| 13071 | |
| 13072 | c = add_com ("hbreak", class_breakpoint, hbreak_command, _("\ |
| 13073 | Set a hardware assisted breakpoint.\n\ |
| 13074 | Like \"break\" except the breakpoint requires hardware support,\n\ |
| 13075 | some target hardware may not have this support.\n\ |
| 13076 | \n" |
| 13077 | BREAK_ARGS_HELP ("hbreak"))); |
| 13078 | set_cmd_completer (c, location_completer); |
| 13079 | |
| 13080 | c = add_com ("thbreak", class_breakpoint, thbreak_command, _("\ |
| 13081 | Set a temporary hardware assisted breakpoint.\n\ |
| 13082 | Like \"hbreak\" except the breakpoint is only temporary,\n\ |
| 13083 | so it will be deleted when hit.\n\ |
| 13084 | \n" |
| 13085 | BREAK_ARGS_HELP ("thbreak"))); |
| 13086 | set_cmd_completer (c, location_completer); |
| 13087 | |
| 13088 | add_prefix_cmd ("enable", class_breakpoint, enable_command, _("\ |
| 13089 | Enable some breakpoints.\n\ |
| 13090 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 13091 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| 13092 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 13093 | With a subcommand you can enable temporarily."), |
| 13094 | &enablelist, "enable ", 1, &cmdlist); |
| 13095 | if (xdb_commands) |
| 13096 | add_com ("ab", class_breakpoint, enable_command, _("\ |
| 13097 | Enable some breakpoints.\n\ |
| 13098 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 13099 | With no subcommand, breakpoints are enabled until you command otherwise.\n\ |
| 13100 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 13101 | With a subcommand you can enable temporarily.")); |
| 13102 | |
| 13103 | add_com_alias ("en", "enable", class_breakpoint, 1); |
| 13104 | |
| 13105 | add_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\ |
| 13106 | Enable some breakpoints.\n\ |
| 13107 | Give breakpoint numbers (separated by spaces) as arguments.\n\ |
| 13108 | This is used to cancel the effect of the \"disable\" command.\n\ |
| 13109 | May be abbreviated to simply \"enable\".\n"), |
| 13110 | &enablebreaklist, "enable breakpoints ", 1, &enablelist); |
| 13111 | |
| 13112 | add_cmd ("once", no_class, enable_once_command, _("\ |
| 13113 | Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 13114 | If a breakpoint is hit while enabled in this fashion, it becomes disabled."), |
| 13115 | &enablebreaklist); |
| 13116 | |
| 13117 | add_cmd ("delete", no_class, enable_delete_command, _("\ |
| 13118 | Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 13119 | If a breakpoint is hit while enabled in this fashion, it is deleted."), |
| 13120 | &enablebreaklist); |
| 13121 | |
| 13122 | add_cmd ("delete", no_class, enable_delete_command, _("\ |
| 13123 | Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ |
| 13124 | If a breakpoint is hit while enabled in this fashion, it is deleted."), |
| 13125 | &enablelist); |
| 13126 | |
| 13127 | add_cmd ("once", no_class, enable_once_command, _("\ |
| 13128 | Enable breakpoints for one hit. Give breakpoint numbers.\n\ |
| 13129 | If a breakpoint is hit while enabled in this fashion, it becomes disabled."), |
| 13130 | &enablelist); |
| 13131 | |
| 13132 | add_prefix_cmd ("disable", class_breakpoint, disable_command, _("\ |
| 13133 | Disable some breakpoints.\n\ |
| 13134 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 13135 | To disable all breakpoints, give no argument.\n\ |
| 13136 | A disabled breakpoint is not forgotten, but has no effect until re-enabled."), |
| 13137 | &disablelist, "disable ", 1, &cmdlist); |
| 13138 | add_com_alias ("dis", "disable", class_breakpoint, 1); |
| 13139 | add_com_alias ("disa", "disable", class_breakpoint, 1); |
| 13140 | if (xdb_commands) |
| 13141 | add_com ("sb", class_breakpoint, disable_command, _("\ |
| 13142 | Disable some breakpoints.\n\ |
| 13143 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 13144 | To disable all breakpoints, give no argument.\n\ |
| 13145 | A disabled breakpoint is not forgotten, but has no effect until re-enabled.")); |
| 13146 | |
| 13147 | add_cmd ("breakpoints", class_alias, disable_command, _("\ |
| 13148 | Disable some breakpoints.\n\ |
| 13149 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 13150 | To disable all breakpoints, give no argument.\n\ |
| 13151 | A disabled breakpoint is not forgotten, but has no effect until re-enabled.\n\ |
| 13152 | This command may be abbreviated \"disable\"."), |
| 13153 | &disablelist); |
| 13154 | |
| 13155 | add_prefix_cmd ("delete", class_breakpoint, delete_command, _("\ |
| 13156 | Delete some breakpoints or auto-display expressions.\n\ |
| 13157 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 13158 | To delete all breakpoints, give no argument.\n\ |
| 13159 | \n\ |
| 13160 | Also a prefix command for deletion of other GDB objects.\n\ |
| 13161 | The \"unset\" command is also an alias for \"delete\"."), |
| 13162 | &deletelist, "delete ", 1, &cmdlist); |
| 13163 | add_com_alias ("d", "delete", class_breakpoint, 1); |
| 13164 | add_com_alias ("del", "delete", class_breakpoint, 1); |
| 13165 | if (xdb_commands) |
| 13166 | add_com ("db", class_breakpoint, delete_command, _("\ |
| 13167 | Delete some breakpoints.\n\ |
| 13168 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 13169 | To delete all breakpoints, give no argument.\n")); |
| 13170 | |
| 13171 | add_cmd ("breakpoints", class_alias, delete_command, _("\ |
| 13172 | Delete some breakpoints or auto-display expressions.\n\ |
| 13173 | Arguments are breakpoint numbers with spaces in between.\n\ |
| 13174 | To delete all breakpoints, give no argument.\n\ |
| 13175 | This command may be abbreviated \"delete\"."), |
| 13176 | &deletelist); |
| 13177 | |
| 13178 | add_com ("clear", class_breakpoint, clear_command, _("\ |
| 13179 | Clear breakpoint at specified line or function.\n\ |
| 13180 | Argument may be line number, function name, or \"*\" and an address.\n\ |
| 13181 | If line number is specified, all breakpoints in that line are cleared.\n\ |
| 13182 | If function is specified, breakpoints at beginning of function are cleared.\n\ |
| 13183 | If an address is specified, breakpoints at that address are cleared.\n\ |
| 13184 | \n\ |
| 13185 | With no argument, clears all breakpoints in the line that the selected frame\n\ |
| 13186 | is executing in.\n\ |
| 13187 | \n\ |
| 13188 | See also the \"delete\" command which clears breakpoints by number.")); |
| 13189 | add_com_alias ("cl", "clear", class_breakpoint, 1); |
| 13190 | |
| 13191 | c = add_com ("break", class_breakpoint, break_command, _("\ |
| 13192 | Set breakpoint at specified line or function.\n" |
| 13193 | BREAK_ARGS_HELP ("break"))); |
| 13194 | set_cmd_completer (c, location_completer); |
| 13195 | |
| 13196 | add_com_alias ("b", "break", class_run, 1); |
| 13197 | add_com_alias ("br", "break", class_run, 1); |
| 13198 | add_com_alias ("bre", "break", class_run, 1); |
| 13199 | add_com_alias ("brea", "break", class_run, 1); |
| 13200 | |
| 13201 | if (xdb_commands) |
| 13202 | add_com_alias ("ba", "break", class_breakpoint, 1); |
| 13203 | |
| 13204 | if (dbx_commands) |
| 13205 | { |
| 13206 | add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command, _("\ |
| 13207 | Break in function/address or break at a line in the current file."), |
| 13208 | &stoplist, "stop ", 1, &cmdlist); |
| 13209 | add_cmd ("in", class_breakpoint, stopin_command, |
| 13210 | _("Break in function or address."), &stoplist); |
| 13211 | add_cmd ("at", class_breakpoint, stopat_command, |
| 13212 | _("Break at a line in the current file."), &stoplist); |
| 13213 | add_com ("status", class_info, breakpoints_info, _("\ |
| 13214 | Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| 13215 | The \"Type\" column indicates one of:\n\ |
| 13216 | \tbreakpoint - normal breakpoint\n\ |
| 13217 | \twatchpoint - watchpoint\n\ |
| 13218 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 13219 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 13220 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 13221 | address and file/line number respectively.\n\ |
| 13222 | \n\ |
| 13223 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 13224 | are set to the address of the last breakpoint listed unless the command\n\ |
| 13225 | is prefixed with \"server \".\n\n\ |
| 13226 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 13227 | breakpoint set.")); |
| 13228 | } |
| 13229 | |
| 13230 | add_info ("breakpoints", breakpoints_info, _("\ |
| 13231 | Status of specified breakpoints (all user-settable breakpoints if no argument).\n\ |
| 13232 | The \"Type\" column indicates one of:\n\ |
| 13233 | \tbreakpoint - normal breakpoint\n\ |
| 13234 | \twatchpoint - watchpoint\n\ |
| 13235 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 13236 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 13237 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 13238 | address and file/line number respectively.\n\ |
| 13239 | \n\ |
| 13240 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 13241 | are set to the address of the last breakpoint listed unless the command\n\ |
| 13242 | is prefixed with \"server \".\n\n\ |
| 13243 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 13244 | breakpoint set.")); |
| 13245 | |
| 13246 | add_info_alias ("b", "breakpoints", 1); |
| 13247 | |
| 13248 | if (xdb_commands) |
| 13249 | add_com ("lb", class_breakpoint, breakpoints_info, _("\ |
| 13250 | Status of user-settable breakpoints, or breakpoint number NUMBER.\n\ |
| 13251 | The \"Type\" column indicates one of:\n\ |
| 13252 | \tbreakpoint - normal breakpoint\n\ |
| 13253 | \twatchpoint - watchpoint\n\ |
| 13254 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 13255 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 13256 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 13257 | address and file/line number respectively.\n\ |
| 13258 | \n\ |
| 13259 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 13260 | are set to the address of the last breakpoint listed unless the command\n\ |
| 13261 | is prefixed with \"server \".\n\n\ |
| 13262 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 13263 | breakpoint set.")); |
| 13264 | |
| 13265 | add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints, _("\ |
| 13266 | Status of all breakpoints, or breakpoint number NUMBER.\n\ |
| 13267 | The \"Type\" column indicates one of:\n\ |
| 13268 | \tbreakpoint - normal breakpoint\n\ |
| 13269 | \twatchpoint - watchpoint\n\ |
| 13270 | \tlongjmp - internal breakpoint used to step through longjmp()\n\ |
| 13271 | \tlongjmp resume - internal breakpoint at the target of longjmp()\n\ |
| 13272 | \tuntil - internal breakpoint used by the \"until\" command\n\ |
| 13273 | \tfinish - internal breakpoint used by the \"finish\" command\n\ |
| 13274 | The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\ |
| 13275 | the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\ |
| 13276 | breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\ |
| 13277 | address and file/line number respectively.\n\ |
| 13278 | \n\ |
| 13279 | Convenience variable \"$_\" and default examine address for \"x\"\n\ |
| 13280 | are set to the address of the last breakpoint listed unless the command\n\ |
| 13281 | is prefixed with \"server \".\n\n\ |
| 13282 | Convenience variable \"$bpnum\" contains the number of the last\n\ |
| 13283 | breakpoint set."), |
| 13284 | &maintenanceinfolist); |
| 13285 | |
| 13286 | add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\ |
| 13287 | Set catchpoints to catch events."), |
| 13288 | &catch_cmdlist, "catch ", |
| 13289 | 0/*allow-unknown*/, &cmdlist); |
| 13290 | |
| 13291 | add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\ |
| 13292 | Set temporary catchpoints to catch events."), |
| 13293 | &tcatch_cmdlist, "tcatch ", |
| 13294 | 0/*allow-unknown*/, &cmdlist); |
| 13295 | |
| 13296 | /* Add catch and tcatch sub-commands. */ |
| 13297 | add_catch_command ("catch", _("\ |
| 13298 | Catch an exception, when caught.\n\ |
| 13299 | With an argument, catch only exceptions with the given name."), |
| 13300 | catch_catch_command, |
| 13301 | NULL, |
| 13302 | CATCH_PERMANENT, |
| 13303 | CATCH_TEMPORARY); |
| 13304 | add_catch_command ("throw", _("\ |
| 13305 | Catch an exception, when thrown.\n\ |
| 13306 | With an argument, catch only exceptions with the given name."), |
| 13307 | catch_throw_command, |
| 13308 | NULL, |
| 13309 | CATCH_PERMANENT, |
| 13310 | CATCH_TEMPORARY); |
| 13311 | add_catch_command ("fork", _("Catch calls to fork."), |
| 13312 | catch_fork_command_1, |
| 13313 | NULL, |
| 13314 | (void *) (uintptr_t) catch_fork_permanent, |
| 13315 | (void *) (uintptr_t) catch_fork_temporary); |
| 13316 | add_catch_command ("vfork", _("Catch calls to vfork."), |
| 13317 | catch_fork_command_1, |
| 13318 | NULL, |
| 13319 | (void *) (uintptr_t) catch_vfork_permanent, |
| 13320 | (void *) (uintptr_t) catch_vfork_temporary); |
| 13321 | add_catch_command ("exec", _("Catch calls to exec."), |
| 13322 | catch_exec_command_1, |
| 13323 | NULL, |
| 13324 | CATCH_PERMANENT, |
| 13325 | CATCH_TEMPORARY); |
| 13326 | add_catch_command ("syscall", _("\ |
| 13327 | Catch system calls by their names and/or numbers.\n\ |
| 13328 | Arguments say which system calls to catch. If no arguments\n\ |
| 13329 | are given, every system call will be caught.\n\ |
| 13330 | Arguments, if given, should be one or more system call names\n\ |
| 13331 | (if your system supports that), or system call numbers."), |
| 13332 | catch_syscall_command_1, |
| 13333 | catch_syscall_completer, |
| 13334 | CATCH_PERMANENT, |
| 13335 | CATCH_TEMPORARY); |
| 13336 | add_catch_command ("exception", _("\ |
| 13337 | Catch Ada exceptions, when raised.\n\ |
| 13338 | With an argument, catch only exceptions with the given name."), |
| 13339 | catch_ada_exception_command, |
| 13340 | NULL, |
| 13341 | CATCH_PERMANENT, |
| 13342 | CATCH_TEMPORARY); |
| 13343 | add_catch_command ("assert", _("\ |
| 13344 | Catch failed Ada assertions, when raised.\n\ |
| 13345 | With an argument, catch only exceptions with the given name."), |
| 13346 | catch_assert_command, |
| 13347 | NULL, |
| 13348 | CATCH_PERMANENT, |
| 13349 | CATCH_TEMPORARY); |
| 13350 | |
| 13351 | c = add_com ("watch", class_breakpoint, watch_command, _("\ |
| 13352 | Set a watchpoint for an expression.\n\ |
| 13353 | Usage: watch [-l|-location] EXPRESSION\n\ |
| 13354 | A watchpoint stops execution of your program whenever the value of\n\ |
| 13355 | an expression changes.\n\ |
| 13356 | If -l or -location is given, this evaluates EXPRESSION and watches\n\ |
| 13357 | the memory to which it refers.")); |
| 13358 | set_cmd_completer (c, expression_completer); |
| 13359 | |
| 13360 | c = add_com ("rwatch", class_breakpoint, rwatch_command, _("\ |
| 13361 | Set a read watchpoint for an expression.\n\ |
| 13362 | Usage: rwatch [-l|-location] EXPRESSION\n\ |
| 13363 | A watchpoint stops execution of your program whenever the value of\n\ |
| 13364 | an expression is read.\n\ |
| 13365 | If -l or -location is given, this evaluates EXPRESSION and watches\n\ |
| 13366 | the memory to which it refers.")); |
| 13367 | set_cmd_completer (c, expression_completer); |
| 13368 | |
| 13369 | c = add_com ("awatch", class_breakpoint, awatch_command, _("\ |
| 13370 | Set a watchpoint for an expression.\n\ |
| 13371 | Usage: awatch [-l|-location] EXPRESSION\n\ |
| 13372 | A watchpoint stops execution of your program whenever the value of\n\ |
| 13373 | an expression is either read or written.\n\ |
| 13374 | If -l or -location is given, this evaluates EXPRESSION and watches\n\ |
| 13375 | the memory to which it refers.")); |
| 13376 | set_cmd_completer (c, expression_completer); |
| 13377 | |
| 13378 | add_info ("watchpoints", watchpoints_info, _("\ |
| 13379 | Status of specified watchpoints (all watchpoints if no argument).")); |
| 13380 | |
| 13381 | /* XXX: cagney/2005-02-23: This should be a boolean, and should |
| 13382 | respond to changes - contrary to the description. */ |
| 13383 | add_setshow_zinteger_cmd ("can-use-hw-watchpoints", class_support, |
| 13384 | &can_use_hw_watchpoints, _("\ |
| 13385 | Set debugger's willingness to use watchpoint hardware."), _("\ |
| 13386 | Show debugger's willingness to use watchpoint hardware."), _("\ |
| 13387 | If zero, gdb will not use hardware for new watchpoints, even if\n\ |
| 13388 | such is available. (However, any hardware watchpoints that were\n\ |
| 13389 | created before setting this to nonzero, will continue to use watchpoint\n\ |
| 13390 | hardware.)"), |
| 13391 | NULL, |
| 13392 | show_can_use_hw_watchpoints, |
| 13393 | &setlist, &showlist); |
| 13394 | |
| 13395 | can_use_hw_watchpoints = 1; |
| 13396 | |
| 13397 | /* Tracepoint manipulation commands. */ |
| 13398 | |
| 13399 | c = add_com ("trace", class_breakpoint, trace_command, _("\ |
| 13400 | Set a tracepoint at specified line or function.\n\ |
| 13401 | \n" |
| 13402 | BREAK_ARGS_HELP ("trace") "\n\ |
| 13403 | Do \"help tracepoints\" for info on other tracepoint commands.")); |
| 13404 | set_cmd_completer (c, location_completer); |
| 13405 | |
| 13406 | add_com_alias ("tp", "trace", class_alias, 0); |
| 13407 | add_com_alias ("tr", "trace", class_alias, 1); |
| 13408 | add_com_alias ("tra", "trace", class_alias, 1); |
| 13409 | add_com_alias ("trac", "trace", class_alias, 1); |
| 13410 | |
| 13411 | c = add_com ("ftrace", class_breakpoint, ftrace_command, _("\ |
| 13412 | Set a fast tracepoint at specified line or function.\n\ |
| 13413 | \n" |
| 13414 | BREAK_ARGS_HELP ("ftrace") "\n\ |
| 13415 | Do \"help tracepoints\" for info on other tracepoint commands.")); |
| 13416 | set_cmd_completer (c, location_completer); |
| 13417 | |
| 13418 | c = add_com ("strace", class_breakpoint, strace_command, _("\ |
| 13419 | Set a static tracepoint at specified line, function or marker.\n\ |
| 13420 | \n\ |
| 13421 | strace [LOCATION] [if CONDITION]\n\ |
| 13422 | LOCATION may be a line number, function name, \"*\" and an address,\n\ |
| 13423 | or -m MARKER_ID.\n\ |
| 13424 | If a line number is specified, probe the marker at start of code\n\ |
| 13425 | for that line. If a function is specified, probe the marker at start\n\ |
| 13426 | of code for that function. If an address is specified, probe the marker\n\ |
| 13427 | at that exact address. If a marker id is specified, probe the marker\n\ |
| 13428 | with that name. With no LOCATION, uses current execution address of\n\ |
| 13429 | the selected stack frame.\n\ |
| 13430 | Static tracepoints accept an extra collect action -- ``collect $_sdata''.\n\ |
| 13431 | This collects arbitrary user data passed in the probe point call to the\n\ |
| 13432 | tracing library. You can inspect it when analyzing the trace buffer,\n\ |
| 13433 | by printing the $_sdata variable like any other convenience variable.\n\ |
| 13434 | \n\ |
| 13435 | CONDITION is a boolean expression.\n\ |
| 13436 | \n\ |
| 13437 | Multiple tracepoints at one place are permitted, and useful if their\n\ |
| 13438 | conditions are different.\n\ |
| 13439 | \n\ |
| 13440 | Do \"help breakpoints\" for info on other commands dealing with breakpoints.\n\ |
| 13441 | Do \"help tracepoints\" for info on other tracepoint commands.")); |
| 13442 | set_cmd_completer (c, location_completer); |
| 13443 | |
| 13444 | add_info ("tracepoints", tracepoints_info, _("\ |
| 13445 | Status of specified tracepoints (all tracepoints if no argument).\n\ |
| 13446 | Convenience variable \"$tpnum\" contains the number of the\n\ |
| 13447 | last tracepoint set.")); |
| 13448 | |
| 13449 | add_info_alias ("tp", "tracepoints", 1); |
| 13450 | |
| 13451 | add_cmd ("tracepoints", class_trace, delete_trace_command, _("\ |
| 13452 | Delete specified tracepoints.\n\ |
| 13453 | Arguments are tracepoint numbers, separated by spaces.\n\ |
| 13454 | No argument means delete all tracepoints."), |
| 13455 | &deletelist); |
| 13456 | |
| 13457 | c = add_cmd ("tracepoints", class_trace, disable_trace_command, _("\ |
| 13458 | Disable specified tracepoints.\n\ |
| 13459 | Arguments are tracepoint numbers, separated by spaces.\n\ |
| 13460 | No argument means disable all tracepoints."), |
| 13461 | &disablelist); |
| 13462 | deprecate_cmd (c, "disable"); |
| 13463 | |
| 13464 | c = add_cmd ("tracepoints", class_trace, enable_trace_command, _("\ |
| 13465 | Enable specified tracepoints.\n\ |
| 13466 | Arguments are tracepoint numbers, separated by spaces.\n\ |
| 13467 | No argument means enable all tracepoints."), |
| 13468 | &enablelist); |
| 13469 | deprecate_cmd (c, "enable"); |
| 13470 | |
| 13471 | add_com ("passcount", class_trace, trace_pass_command, _("\ |
| 13472 | Set the passcount for a tracepoint.\n\ |
| 13473 | The trace will end when the tracepoint has been passed 'count' times.\n\ |
| 13474 | Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\ |
| 13475 | if TPNUM is omitted, passcount refers to the last tracepoint defined.")); |
| 13476 | |
| 13477 | add_prefix_cmd ("save", class_breakpoint, save_command, |
| 13478 | _("Save breakpoint definitions as a script."), |
| 13479 | &save_cmdlist, "save ", |
| 13480 | 0/*allow-unknown*/, &cmdlist); |
| 13481 | |
| 13482 | c = add_cmd ("breakpoints", class_breakpoint, save_breakpoints_command, _("\ |
| 13483 | Save current breakpoint definitions as a script.\n\ |
| 13484 | This includes all types of breakpoints (breakpoints, watchpoints,\n\ |
| 13485 | catchpoints, tracepoints). Use the 'source' command in another debug\n\ |
| 13486 | session to restore them."), |
| 13487 | &save_cmdlist); |
| 13488 | set_cmd_completer (c, filename_completer); |
| 13489 | |
| 13490 | c = add_cmd ("tracepoints", class_trace, save_tracepoints_command, _("\ |
| 13491 | Save current tracepoint definitions as a script.\n\ |
| 13492 | Use the 'source' command in another debug session to restore them."), |
| 13493 | &save_cmdlist); |
| 13494 | set_cmd_completer (c, filename_completer); |
| 13495 | |
| 13496 | c = add_com_alias ("save-tracepoints", "save tracepoints", class_trace, 0); |
| 13497 | deprecate_cmd (c, "save tracepoints"); |
| 13498 | |
| 13499 | add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, _("\ |
| 13500 | Breakpoint specific settings\n\ |
| 13501 | Configure various breakpoint-specific variables such as\n\ |
| 13502 | pending breakpoint behavior"), |
| 13503 | &breakpoint_set_cmdlist, "set breakpoint ", |
| 13504 | 0/*allow-unknown*/, &setlist); |
| 13505 | add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, _("\ |
| 13506 | Breakpoint specific settings\n\ |
| 13507 | Configure various breakpoint-specific variables such as\n\ |
| 13508 | pending breakpoint behavior"), |
| 13509 | &breakpoint_show_cmdlist, "show breakpoint ", |
| 13510 | 0/*allow-unknown*/, &showlist); |
| 13511 | |
| 13512 | add_setshow_auto_boolean_cmd ("pending", no_class, |
| 13513 | &pending_break_support, _("\ |
| 13514 | Set debugger's behavior regarding pending breakpoints."), _("\ |
| 13515 | Show debugger's behavior regarding pending breakpoints."), _("\ |
| 13516 | If on, an unrecognized breakpoint location will cause gdb to create a\n\ |
| 13517 | pending breakpoint. If off, an unrecognized breakpoint location results in\n\ |
| 13518 | an error. If auto, an unrecognized breakpoint location results in a\n\ |
| 13519 | user-query to see if a pending breakpoint should be created."), |
| 13520 | NULL, |
| 13521 | show_pending_break_support, |
| 13522 | &breakpoint_set_cmdlist, |
| 13523 | &breakpoint_show_cmdlist); |
| 13524 | |
| 13525 | pending_break_support = AUTO_BOOLEAN_AUTO; |
| 13526 | |
| 13527 | add_setshow_boolean_cmd ("auto-hw", no_class, |
| 13528 | &automatic_hardware_breakpoints, _("\ |
| 13529 | Set automatic usage of hardware breakpoints."), _("\ |
| 13530 | Show automatic usage of hardware breakpoints."), _("\ |
| 13531 | If set, the debugger will automatically use hardware breakpoints for\n\ |
| 13532 | breakpoints set with \"break\" but falling in read-only memory. If not set,\n\ |
| 13533 | a warning will be emitted for such breakpoints."), |
| 13534 | NULL, |
| 13535 | show_automatic_hardware_breakpoints, |
| 13536 | &breakpoint_set_cmdlist, |
| 13537 | &breakpoint_show_cmdlist); |
| 13538 | |
| 13539 | add_setshow_enum_cmd ("always-inserted", class_support, |
| 13540 | always_inserted_enums, &always_inserted_mode, _("\ |
| 13541 | Set mode for inserting breakpoints."), _("\ |
| 13542 | Show mode for inserting breakpoints."), _("\ |
| 13543 | When this mode is off, breakpoints are inserted in inferior when it is\n\ |
| 13544 | resumed, and removed when execution stops. When this mode is on,\n\ |
| 13545 | breakpoints are inserted immediately and removed only when the user\n\ |
| 13546 | deletes the breakpoint. When this mode is auto (which is the default),\n\ |
| 13547 | the behaviour depends on the non-stop setting (see help set non-stop).\n\ |
| 13548 | In this case, if gdb is controlling the inferior in non-stop mode, gdb\n\ |
| 13549 | behaves as if always-inserted mode is on; if gdb is controlling the\n\ |
| 13550 | inferior in all-stop mode, gdb behaves as if always-inserted mode is off."), |
| 13551 | NULL, |
| 13552 | &show_always_inserted_mode, |
| 13553 | &breakpoint_set_cmdlist, |
| 13554 | &breakpoint_show_cmdlist); |
| 13555 | |
| 13556 | add_com ("break-range", class_breakpoint, break_range_command, _("\ |
| 13557 | Set a breakpoint for an address range.\n\ |
| 13558 | break-range START-LOCATION, END-LOCATION\n\ |
| 13559 | where START-LOCATION and END-LOCATION can be one of the following:\n\ |
| 13560 | LINENUM, for that line in the current file,\n\ |
| 13561 | FILE:LINENUM, for that line in that file,\n\ |
| 13562 | +OFFSET, for that number of lines after the current line\n\ |
| 13563 | or the start of the range\n\ |
| 13564 | FUNCTION, for the first line in that function,\n\ |
| 13565 | FILE:FUNCTION, to distinguish among like-named static functions.\n\ |
| 13566 | *ADDRESS, for the instruction at that address.\n\ |
| 13567 | \n\ |
| 13568 | The breakpoint will stop execution of the inferior whenever it executes\n\ |
| 13569 | an instruction at any address within the [START-LOCATION, END-LOCATION]\n\ |
| 13570 | range (including START-LOCATION and END-LOCATION).")); |
| 13571 | |
| 13572 | automatic_hardware_breakpoints = 1; |
| 13573 | |
| 13574 | observer_attach_about_to_proceed (breakpoint_about_to_proceed); |
| 13575 | } |