| 1 | /* Process record and replay target for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2008-2019 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbcmd.h" |
| 22 | #include "completer.h" |
| 23 | #include "record.h" |
| 24 | #include "observable.h" |
| 25 | #include "inferior.h" |
| 26 | #include "gdbsupport/common-utils.h" |
| 27 | #include "cli/cli-utils.h" |
| 28 | #include "disasm.h" |
| 29 | |
| 30 | #include <ctype.h> |
| 31 | |
| 32 | /* This is the debug switch for process record. */ |
| 33 | unsigned int record_debug = 0; |
| 34 | |
| 35 | /* The number of instructions to print in "record instruction-history". */ |
| 36 | static unsigned int record_insn_history_size = 10; |
| 37 | |
| 38 | /* The variable registered as control variable in the "record |
| 39 | instruction-history" command. Necessary for extra input |
| 40 | validation. */ |
| 41 | static unsigned int record_insn_history_size_setshow_var; |
| 42 | |
| 43 | /* The number of functions to print in "record function-call-history". */ |
| 44 | static unsigned int record_call_history_size = 10; |
| 45 | |
| 46 | /* The variable registered as control variable in the "record |
| 47 | call-history" command. Necessary for extra input validation. */ |
| 48 | static unsigned int record_call_history_size_setshow_var; |
| 49 | |
| 50 | struct cmd_list_element *record_cmdlist = NULL; |
| 51 | struct cmd_list_element *record_goto_cmdlist = NULL; |
| 52 | struct cmd_list_element *set_record_cmdlist = NULL; |
| 53 | struct cmd_list_element *show_record_cmdlist = NULL; |
| 54 | struct cmd_list_element *info_record_cmdlist = NULL; |
| 55 | |
| 56 | #define DEBUG(msg, args...) \ |
| 57 | if (record_debug) \ |
| 58 | fprintf_unfiltered (gdb_stdlog, "record: " msg "\n", ##args) |
| 59 | |
| 60 | /* See record.h. */ |
| 61 | |
| 62 | struct target_ops * |
| 63 | find_record_target (void) |
| 64 | { |
| 65 | return find_target_at (record_stratum); |
| 66 | } |
| 67 | |
| 68 | /* Check that recording is active. Throw an error, if it isn't. */ |
| 69 | |
| 70 | static struct target_ops * |
| 71 | require_record_target (void) |
| 72 | { |
| 73 | struct target_ops *t; |
| 74 | |
| 75 | t = find_record_target (); |
| 76 | if (t == NULL) |
| 77 | error (_("No record target is currently active.\n" |
| 78 | "Use one of the \"target record-<TAB><TAB>\" commands first.")); |
| 79 | |
| 80 | return t; |
| 81 | } |
| 82 | |
| 83 | /* See record.h. */ |
| 84 | |
| 85 | void |
| 86 | record_preopen (void) |
| 87 | { |
| 88 | /* Check if a record target is already running. */ |
| 89 | if (find_record_target () != NULL) |
| 90 | error (_("The process is already being recorded. Use \"record stop\" to " |
| 91 | "stop recording first.")); |
| 92 | } |
| 93 | |
| 94 | /* See record.h. */ |
| 95 | |
| 96 | void |
| 97 | record_start (const char *method, const char *format, int from_tty) |
| 98 | { |
| 99 | if (method == NULL) |
| 100 | { |
| 101 | if (format == NULL) |
| 102 | execute_command_to_string ("record", from_tty, false); |
| 103 | else |
| 104 | error (_("Invalid format.")); |
| 105 | } |
| 106 | else if (strcmp (method, "full") == 0) |
| 107 | { |
| 108 | if (format == NULL) |
| 109 | execute_command_to_string ("record full", from_tty, false); |
| 110 | else |
| 111 | error (_("Invalid format.")); |
| 112 | } |
| 113 | else if (strcmp (method, "btrace") == 0) |
| 114 | { |
| 115 | if (format == NULL) |
| 116 | execute_command_to_string ("record btrace", from_tty, false); |
| 117 | else if (strcmp (format, "bts") == 0) |
| 118 | execute_command_to_string ("record btrace bts", from_tty, false); |
| 119 | else if (strcmp (format, "pt") == 0) |
| 120 | execute_command_to_string ("record btrace pt", from_tty, false); |
| 121 | else |
| 122 | error (_("Invalid format.")); |
| 123 | } |
| 124 | else |
| 125 | error (_("Invalid method.")); |
| 126 | } |
| 127 | |
| 128 | /* See record.h. */ |
| 129 | |
| 130 | void |
| 131 | record_stop (int from_tty) |
| 132 | { |
| 133 | execute_command_to_string ("record stop", from_tty, false); |
| 134 | } |
| 135 | |
| 136 | /* See record.h. */ |
| 137 | |
| 138 | int |
| 139 | record_read_memory (struct gdbarch *gdbarch, |
| 140 | CORE_ADDR memaddr, gdb_byte *myaddr, |
| 141 | ssize_t len) |
| 142 | { |
| 143 | int ret = target_read_memory (memaddr, myaddr, len); |
| 144 | |
| 145 | if (ret != 0) |
| 146 | DEBUG ("error reading memory at addr %s len = %ld.\n", |
| 147 | paddress (gdbarch, memaddr), (long) len); |
| 148 | |
| 149 | return ret; |
| 150 | } |
| 151 | |
| 152 | /* Stop recording. */ |
| 153 | |
| 154 | static void |
| 155 | record_stop (struct target_ops *t) |
| 156 | { |
| 157 | DEBUG ("stop %s", t->shortname ()); |
| 158 | |
| 159 | t->stop_recording (); |
| 160 | } |
| 161 | |
| 162 | /* Unpush the record target. */ |
| 163 | |
| 164 | static void |
| 165 | record_unpush (struct target_ops *t) |
| 166 | { |
| 167 | DEBUG ("unpush %s", t->shortname ()); |
| 168 | |
| 169 | unpush_target (t); |
| 170 | } |
| 171 | |
| 172 | /* See record.h. */ |
| 173 | |
| 174 | void |
| 175 | record_disconnect (struct target_ops *t, const char *args, int from_tty) |
| 176 | { |
| 177 | gdb_assert (t->stratum () == record_stratum); |
| 178 | |
| 179 | DEBUG ("disconnect %s", t->shortname ()); |
| 180 | |
| 181 | record_stop (t); |
| 182 | record_unpush (t); |
| 183 | |
| 184 | target_disconnect (args, from_tty); |
| 185 | } |
| 186 | |
| 187 | /* See record.h. */ |
| 188 | |
| 189 | void |
| 190 | record_detach (struct target_ops *t, inferior *inf, int from_tty) |
| 191 | { |
| 192 | gdb_assert (t->stratum () == record_stratum); |
| 193 | |
| 194 | DEBUG ("detach %s", t->shortname ()); |
| 195 | |
| 196 | record_stop (t); |
| 197 | record_unpush (t); |
| 198 | |
| 199 | target_detach (inf, from_tty); |
| 200 | } |
| 201 | |
| 202 | /* See record.h. */ |
| 203 | |
| 204 | void |
| 205 | record_mourn_inferior (struct target_ops *t) |
| 206 | { |
| 207 | gdb_assert (t->stratum () == record_stratum); |
| 208 | |
| 209 | DEBUG ("mourn inferior %s", t->shortname ()); |
| 210 | |
| 211 | /* It is safer to not stop recording. Resources will be freed when |
| 212 | threads are discarded. */ |
| 213 | record_unpush (t); |
| 214 | |
| 215 | target_mourn_inferior (inferior_ptid); |
| 216 | } |
| 217 | |
| 218 | /* See record.h. */ |
| 219 | |
| 220 | void |
| 221 | record_kill (struct target_ops *t) |
| 222 | { |
| 223 | gdb_assert (t->stratum () == record_stratum); |
| 224 | |
| 225 | DEBUG ("kill %s", t->shortname ()); |
| 226 | |
| 227 | /* It is safer to not stop recording. Resources will be freed when |
| 228 | threads are discarded. */ |
| 229 | record_unpush (t); |
| 230 | |
| 231 | target_kill (); |
| 232 | } |
| 233 | |
| 234 | /* See record.h. */ |
| 235 | |
| 236 | int |
| 237 | record_check_stopped_by_breakpoint (const address_space *aspace, |
| 238 | CORE_ADDR pc, |
| 239 | enum target_stop_reason *reason) |
| 240 | { |
| 241 | if (breakpoint_inserted_here_p (aspace, pc)) |
| 242 | { |
| 243 | if (hardware_breakpoint_inserted_here_p (aspace, pc)) |
| 244 | *reason = TARGET_STOPPED_BY_HW_BREAKPOINT; |
| 245 | else |
| 246 | *reason = TARGET_STOPPED_BY_SW_BREAKPOINT; |
| 247 | return 1; |
| 248 | } |
| 249 | |
| 250 | *reason = TARGET_STOPPED_BY_NO_REASON; |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | /* Implement "show record debug" command. */ |
| 255 | |
| 256 | static void |
| 257 | show_record_debug (struct ui_file *file, int from_tty, |
| 258 | struct cmd_list_element *c, const char *value) |
| 259 | { |
| 260 | fprintf_filtered (file, _("Debugging of process record target is %s.\n"), |
| 261 | value); |
| 262 | } |
| 263 | |
| 264 | /* Alias for "target record". */ |
| 265 | |
| 266 | static void |
| 267 | cmd_record_start (const char *args, int from_tty) |
| 268 | { |
| 269 | execute_command ("target record-full", from_tty); |
| 270 | } |
| 271 | |
| 272 | /* Truncate the record log from the present point |
| 273 | of replay until the end. */ |
| 274 | |
| 275 | static void |
| 276 | cmd_record_delete (const char *args, int from_tty) |
| 277 | { |
| 278 | require_record_target (); |
| 279 | |
| 280 | if (!target_record_is_replaying (inferior_ptid)) |
| 281 | { |
| 282 | printf_unfiltered (_("Already at end of record list.\n")); |
| 283 | return; |
| 284 | } |
| 285 | |
| 286 | if (!target_supports_delete_record ()) |
| 287 | { |
| 288 | printf_unfiltered (_("The current record target does not support " |
| 289 | "this operation.\n")); |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | if (!from_tty || query (_("Delete the log from this point forward " |
| 294 | "and begin to record the running message " |
| 295 | "at current PC?"))) |
| 296 | target_delete_record (); |
| 297 | } |
| 298 | |
| 299 | /* Implement the "stoprecord" or "record stop" command. */ |
| 300 | |
| 301 | static void |
| 302 | cmd_record_stop (const char *args, int from_tty) |
| 303 | { |
| 304 | struct target_ops *t; |
| 305 | |
| 306 | t = require_record_target (); |
| 307 | |
| 308 | record_stop (t); |
| 309 | record_unpush (t); |
| 310 | |
| 311 | printf_unfiltered (_("Process record is stopped and all execution " |
| 312 | "logs are deleted.\n")); |
| 313 | |
| 314 | gdb::observers::record_changed.notify (current_inferior (), 0, NULL, NULL); |
| 315 | } |
| 316 | |
| 317 | /* The "set record" command. */ |
| 318 | |
| 319 | static void |
| 320 | set_record_command (const char *args, int from_tty) |
| 321 | { |
| 322 | printf_unfiltered (_("\"set record\" must be followed " |
| 323 | "by an appropriate subcommand.\n")); |
| 324 | help_list (set_record_cmdlist, "set record ", all_commands, gdb_stdout); |
| 325 | } |
| 326 | |
| 327 | /* The "show record" command. */ |
| 328 | |
| 329 | static void |
| 330 | show_record_command (const char *args, int from_tty) |
| 331 | { |
| 332 | cmd_show_list (show_record_cmdlist, from_tty, ""); |
| 333 | } |
| 334 | |
| 335 | /* The "info record" command. */ |
| 336 | |
| 337 | static void |
| 338 | info_record_command (const char *args, int from_tty) |
| 339 | { |
| 340 | struct target_ops *t; |
| 341 | |
| 342 | t = find_record_target (); |
| 343 | if (t == NULL) |
| 344 | { |
| 345 | printf_filtered (_("No record target is currently active.\n")); |
| 346 | return; |
| 347 | } |
| 348 | |
| 349 | printf_filtered (_("Active record target: %s\n"), t->shortname ()); |
| 350 | t->info_record (); |
| 351 | } |
| 352 | |
| 353 | /* The "record save" command. */ |
| 354 | |
| 355 | static void |
| 356 | cmd_record_save (const char *args, int from_tty) |
| 357 | { |
| 358 | const char *recfilename; |
| 359 | char recfilename_buffer[40]; |
| 360 | |
| 361 | require_record_target (); |
| 362 | |
| 363 | if (args != NULL && *args != 0) |
| 364 | recfilename = args; |
| 365 | else |
| 366 | { |
| 367 | /* Default recfile name is "gdb_record.PID". */ |
| 368 | xsnprintf (recfilename_buffer, sizeof (recfilename_buffer), |
| 369 | "gdb_record.%d", inferior_ptid.pid ()); |
| 370 | recfilename = recfilename_buffer; |
| 371 | } |
| 372 | |
| 373 | target_save_record (recfilename); |
| 374 | } |
| 375 | |
| 376 | /* See record.h. */ |
| 377 | |
| 378 | void |
| 379 | record_goto (const char *arg) |
| 380 | { |
| 381 | ULONGEST insn; |
| 382 | |
| 383 | if (arg == NULL || *arg == '\0') |
| 384 | error (_("Command requires an argument (insn number to go to).")); |
| 385 | |
| 386 | insn = parse_and_eval_long (arg); |
| 387 | |
| 388 | require_record_target (); |
| 389 | target_goto_record (insn); |
| 390 | } |
| 391 | |
| 392 | /* "record goto" command. Argument is an instruction number, |
| 393 | as given by "info record". |
| 394 | |
| 395 | Rewinds the recording (forward or backward) to the given instruction. */ |
| 396 | |
| 397 | static void |
| 398 | cmd_record_goto (const char *arg, int from_tty) |
| 399 | { |
| 400 | record_goto (arg); |
| 401 | } |
| 402 | |
| 403 | /* The "record goto begin" command. */ |
| 404 | |
| 405 | static void |
| 406 | cmd_record_goto_begin (const char *arg, int from_tty) |
| 407 | { |
| 408 | if (arg != NULL && *arg != '\0') |
| 409 | error (_("Junk after argument: %s."), arg); |
| 410 | |
| 411 | require_record_target (); |
| 412 | target_goto_record_begin (); |
| 413 | } |
| 414 | |
| 415 | /* The "record goto end" command. */ |
| 416 | |
| 417 | static void |
| 418 | cmd_record_goto_end (const char *arg, int from_tty) |
| 419 | { |
| 420 | if (arg != NULL && *arg != '\0') |
| 421 | error (_("Junk after argument: %s."), arg); |
| 422 | |
| 423 | require_record_target (); |
| 424 | target_goto_record_end (); |
| 425 | } |
| 426 | |
| 427 | /* Read an instruction number from an argument string. */ |
| 428 | |
| 429 | static ULONGEST |
| 430 | get_insn_number (const char **arg) |
| 431 | { |
| 432 | ULONGEST number; |
| 433 | const char *begin, *end, *pos; |
| 434 | |
| 435 | begin = *arg; |
| 436 | pos = skip_spaces (begin); |
| 437 | |
| 438 | if (!isdigit (*pos)) |
| 439 | error (_("Expected positive number, got: %s."), pos); |
| 440 | |
| 441 | number = strtoulst (pos, &end, 10); |
| 442 | |
| 443 | *arg += (end - begin); |
| 444 | |
| 445 | return number; |
| 446 | } |
| 447 | |
| 448 | /* Read a context size from an argument string. */ |
| 449 | |
| 450 | static int |
| 451 | get_context_size (const char **arg) |
| 452 | { |
| 453 | const char *pos; |
| 454 | char *end; |
| 455 | |
| 456 | pos = skip_spaces (*arg); |
| 457 | |
| 458 | if (!isdigit (*pos)) |
| 459 | error (_("Expected positive number, got: %s."), pos); |
| 460 | |
| 461 | long result = strtol (pos, &end, 10); |
| 462 | *arg = end; |
| 463 | return result; |
| 464 | } |
| 465 | |
| 466 | /* Complain about junk at the end of an argument string. */ |
| 467 | |
| 468 | static void |
| 469 | no_chunk (const char *arg) |
| 470 | { |
| 471 | if (*arg != 0) |
| 472 | error (_("Junk after argument: %s."), arg); |
| 473 | } |
| 474 | |
| 475 | /* Read instruction-history modifiers from an argument string. */ |
| 476 | |
| 477 | static gdb_disassembly_flags |
| 478 | get_insn_history_modifiers (const char **arg) |
| 479 | { |
| 480 | gdb_disassembly_flags modifiers; |
| 481 | const char *args; |
| 482 | |
| 483 | modifiers = 0; |
| 484 | args = *arg; |
| 485 | |
| 486 | if (args == NULL) |
| 487 | return modifiers; |
| 488 | |
| 489 | while (*args == '/') |
| 490 | { |
| 491 | ++args; |
| 492 | |
| 493 | if (*args == '\0') |
| 494 | error (_("Missing modifier.")); |
| 495 | |
| 496 | for (; *args; ++args) |
| 497 | { |
| 498 | if (isspace (*args)) |
| 499 | break; |
| 500 | |
| 501 | if (*args == '/') |
| 502 | continue; |
| 503 | |
| 504 | switch (*args) |
| 505 | { |
| 506 | case 'm': |
| 507 | case 's': |
| 508 | modifiers |= DISASSEMBLY_SOURCE; |
| 509 | modifiers |= DISASSEMBLY_FILENAME; |
| 510 | break; |
| 511 | case 'r': |
| 512 | modifiers |= DISASSEMBLY_RAW_INSN; |
| 513 | break; |
| 514 | case 'f': |
| 515 | modifiers |= DISASSEMBLY_OMIT_FNAME; |
| 516 | break; |
| 517 | case 'p': |
| 518 | modifiers |= DISASSEMBLY_OMIT_PC; |
| 519 | break; |
| 520 | default: |
| 521 | error (_("Invalid modifier: %c."), *args); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | args = skip_spaces (args); |
| 526 | } |
| 527 | |
| 528 | /* Update the argument string. */ |
| 529 | *arg = args; |
| 530 | |
| 531 | return modifiers; |
| 532 | } |
| 533 | |
| 534 | /* The "set record instruction-history-size / set record |
| 535 | function-call-history-size" commands are unsigned, with UINT_MAX |
| 536 | meaning unlimited. The target interfaces works with signed int |
| 537 | though, to indicate direction, so map "unlimited" to INT_MAX, which |
| 538 | is about the same as unlimited in practice. If the user does have |
| 539 | a log that huge, she can fetch it in chunks across several requests, |
| 540 | but she'll likely have other problems first... */ |
| 541 | |
| 542 | static int |
| 543 | command_size_to_target_size (unsigned int size) |
| 544 | { |
| 545 | gdb_assert (size <= INT_MAX || size == UINT_MAX); |
| 546 | |
| 547 | if (size == UINT_MAX) |
| 548 | return INT_MAX; |
| 549 | else |
| 550 | return size; |
| 551 | } |
| 552 | |
| 553 | /* The "record instruction-history" command. */ |
| 554 | |
| 555 | static void |
| 556 | cmd_record_insn_history (const char *arg, int from_tty) |
| 557 | { |
| 558 | require_record_target (); |
| 559 | |
| 560 | gdb_disassembly_flags flags = get_insn_history_modifiers (&arg); |
| 561 | |
| 562 | int size = command_size_to_target_size (record_insn_history_size); |
| 563 | |
| 564 | if (arg == NULL || *arg == 0 || strcmp (arg, "+") == 0) |
| 565 | target_insn_history (size, flags); |
| 566 | else if (strcmp (arg, "-") == 0) |
| 567 | target_insn_history (-size, flags); |
| 568 | else |
| 569 | { |
| 570 | ULONGEST begin, end; |
| 571 | |
| 572 | begin = get_insn_number (&arg); |
| 573 | |
| 574 | if (*arg == ',') |
| 575 | { |
| 576 | arg = skip_spaces (++arg); |
| 577 | |
| 578 | if (*arg == '+') |
| 579 | { |
| 580 | arg += 1; |
| 581 | size = get_context_size (&arg); |
| 582 | |
| 583 | no_chunk (arg); |
| 584 | |
| 585 | target_insn_history_from (begin, size, flags); |
| 586 | } |
| 587 | else if (*arg == '-') |
| 588 | { |
| 589 | arg += 1; |
| 590 | size = get_context_size (&arg); |
| 591 | |
| 592 | no_chunk (arg); |
| 593 | |
| 594 | target_insn_history_from (begin, -size, flags); |
| 595 | } |
| 596 | else |
| 597 | { |
| 598 | end = get_insn_number (&arg); |
| 599 | |
| 600 | no_chunk (arg); |
| 601 | |
| 602 | target_insn_history_range (begin, end, flags); |
| 603 | } |
| 604 | } |
| 605 | else |
| 606 | { |
| 607 | no_chunk (arg); |
| 608 | |
| 609 | target_insn_history_from (begin, size, flags); |
| 610 | } |
| 611 | |
| 612 | dont_repeat (); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | /* Read function-call-history modifiers from an argument string. */ |
| 617 | |
| 618 | static record_print_flags |
| 619 | get_call_history_modifiers (const char **arg) |
| 620 | { |
| 621 | record_print_flags modifiers = 0; |
| 622 | const char *args = *arg; |
| 623 | |
| 624 | if (args == NULL) |
| 625 | return modifiers; |
| 626 | |
| 627 | while (*args == '/') |
| 628 | { |
| 629 | ++args; |
| 630 | |
| 631 | if (*args == '\0') |
| 632 | error (_("Missing modifier.")); |
| 633 | |
| 634 | for (; *args; ++args) |
| 635 | { |
| 636 | if (isspace (*args)) |
| 637 | break; |
| 638 | |
| 639 | if (*args == '/') |
| 640 | continue; |
| 641 | |
| 642 | switch (*args) |
| 643 | { |
| 644 | case 'l': |
| 645 | modifiers |= RECORD_PRINT_SRC_LINE; |
| 646 | break; |
| 647 | case 'i': |
| 648 | modifiers |= RECORD_PRINT_INSN_RANGE; |
| 649 | break; |
| 650 | case 'c': |
| 651 | modifiers |= RECORD_PRINT_INDENT_CALLS; |
| 652 | break; |
| 653 | default: |
| 654 | error (_("Invalid modifier: %c."), *args); |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | args = skip_spaces (args); |
| 659 | } |
| 660 | |
| 661 | /* Update the argument string. */ |
| 662 | *arg = args; |
| 663 | |
| 664 | return modifiers; |
| 665 | } |
| 666 | |
| 667 | /* The "record function-call-history" command. */ |
| 668 | |
| 669 | static void |
| 670 | cmd_record_call_history (const char *arg, int from_tty) |
| 671 | { |
| 672 | require_record_target (); |
| 673 | |
| 674 | record_print_flags flags = get_call_history_modifiers (&arg); |
| 675 | |
| 676 | int size = command_size_to_target_size (record_call_history_size); |
| 677 | |
| 678 | if (arg == NULL || *arg == 0 || strcmp (arg, "+") == 0) |
| 679 | target_call_history (size, flags); |
| 680 | else if (strcmp (arg, "-") == 0) |
| 681 | target_call_history (-size, flags); |
| 682 | else |
| 683 | { |
| 684 | ULONGEST begin, end; |
| 685 | |
| 686 | begin = get_insn_number (&arg); |
| 687 | |
| 688 | if (*arg == ',') |
| 689 | { |
| 690 | arg = skip_spaces (++arg); |
| 691 | |
| 692 | if (*arg == '+') |
| 693 | { |
| 694 | arg += 1; |
| 695 | size = get_context_size (&arg); |
| 696 | |
| 697 | no_chunk (arg); |
| 698 | |
| 699 | target_call_history_from (begin, size, flags); |
| 700 | } |
| 701 | else if (*arg == '-') |
| 702 | { |
| 703 | arg += 1; |
| 704 | size = get_context_size (&arg); |
| 705 | |
| 706 | no_chunk (arg); |
| 707 | |
| 708 | target_call_history_from (begin, -size, flags); |
| 709 | } |
| 710 | else |
| 711 | { |
| 712 | end = get_insn_number (&arg); |
| 713 | |
| 714 | no_chunk (arg); |
| 715 | |
| 716 | target_call_history_range (begin, end, flags); |
| 717 | } |
| 718 | } |
| 719 | else |
| 720 | { |
| 721 | no_chunk (arg); |
| 722 | |
| 723 | target_call_history_from (begin, size, flags); |
| 724 | } |
| 725 | |
| 726 | dont_repeat (); |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | /* Helper for "set record instruction-history-size" and "set record |
| 731 | function-call-history-size" input validation. COMMAND_VAR is the |
| 732 | variable registered in the command as control variable. *SETTING |
| 733 | is the real setting the command allows changing. */ |
| 734 | |
| 735 | static void |
| 736 | validate_history_size (unsigned int *command_var, unsigned int *setting) |
| 737 | { |
| 738 | if (*command_var != UINT_MAX && *command_var > INT_MAX) |
| 739 | { |
| 740 | unsigned int new_value = *command_var; |
| 741 | |
| 742 | /* Restore previous value. */ |
| 743 | *command_var = *setting; |
| 744 | error (_("integer %u out of range"), new_value); |
| 745 | } |
| 746 | |
| 747 | /* Commit new value. */ |
| 748 | *setting = *command_var; |
| 749 | } |
| 750 | |
| 751 | /* Called by do_setshow_command. We only want values in the |
| 752 | [0..INT_MAX] range, while the command's machinery accepts |
| 753 | [0..UINT_MAX]. See command_size_to_target_size. */ |
| 754 | |
| 755 | static void |
| 756 | set_record_insn_history_size (const char *args, int from_tty, |
| 757 | struct cmd_list_element *c) |
| 758 | { |
| 759 | validate_history_size (&record_insn_history_size_setshow_var, |
| 760 | &record_insn_history_size); |
| 761 | } |
| 762 | |
| 763 | /* Called by do_setshow_command. We only want values in the |
| 764 | [0..INT_MAX] range, while the command's machinery accepts |
| 765 | [0..UINT_MAX]. See command_size_to_target_size. */ |
| 766 | |
| 767 | static void |
| 768 | set_record_call_history_size (const char *args, int from_tty, |
| 769 | struct cmd_list_element *c) |
| 770 | { |
| 771 | validate_history_size (&record_call_history_size_setshow_var, |
| 772 | &record_call_history_size); |
| 773 | } |
| 774 | |
| 775 | void |
| 776 | _initialize_record (void) |
| 777 | { |
| 778 | struct cmd_list_element *c; |
| 779 | |
| 780 | add_setshow_zuinteger_cmd ("record", no_class, &record_debug, |
| 781 | _("Set debugging of record/replay feature."), |
| 782 | _("Show debugging of record/replay feature."), |
| 783 | _("When enabled, debugging output for " |
| 784 | "record/replay feature is displayed."), |
| 785 | NULL, show_record_debug, &setdebuglist, |
| 786 | &showdebuglist); |
| 787 | |
| 788 | add_setshow_uinteger_cmd ("instruction-history-size", no_class, |
| 789 | &record_insn_history_size_setshow_var, _("\ |
| 790 | Set number of instructions to print in \"record instruction-history\"."), _("\ |
| 791 | Show number of instructions to print in \"record instruction-history\"."), _("\ |
| 792 | A size of \"unlimited\" means unlimited instructions. The default is 10."), |
| 793 | set_record_insn_history_size, NULL, |
| 794 | &set_record_cmdlist, &show_record_cmdlist); |
| 795 | |
| 796 | add_setshow_uinteger_cmd ("function-call-history-size", no_class, |
| 797 | &record_call_history_size_setshow_var, _("\ |
| 798 | Set number of function to print in \"record function-call-history\"."), _("\ |
| 799 | Show number of functions to print in \"record function-call-history\"."), _("\ |
| 800 | A size of \"unlimited\" means unlimited lines. The default is 10."), |
| 801 | set_record_call_history_size, NULL, |
| 802 | &set_record_cmdlist, &show_record_cmdlist); |
| 803 | |
| 804 | c = add_prefix_cmd ("record", class_obscure, cmd_record_start, |
| 805 | _("Start recording."), |
| 806 | &record_cmdlist, "record ", 0, &cmdlist); |
| 807 | set_cmd_completer (c, filename_completer); |
| 808 | |
| 809 | add_com_alias ("rec", "record", class_obscure, 1); |
| 810 | add_prefix_cmd ("record", class_support, set_record_command, |
| 811 | _("Set record options."), &set_record_cmdlist, |
| 812 | "set record ", 0, &setlist); |
| 813 | add_alias_cmd ("rec", "record", class_obscure, 1, &setlist); |
| 814 | add_prefix_cmd ("record", class_support, show_record_command, |
| 815 | _("Show record options."), &show_record_cmdlist, |
| 816 | "show record ", 0, &showlist); |
| 817 | add_alias_cmd ("rec", "record", class_obscure, 1, &showlist); |
| 818 | add_prefix_cmd ("record", class_support, info_record_command, |
| 819 | _("Info record options."), &info_record_cmdlist, |
| 820 | "info record ", 0, &infolist); |
| 821 | add_alias_cmd ("rec", "record", class_obscure, 1, &infolist); |
| 822 | |
| 823 | c = add_cmd ("save", class_obscure, cmd_record_save, |
| 824 | _("Save the execution log to a file.\n\ |
| 825 | Usage: record save [FILENAME]\n\ |
| 826 | Default filename is 'gdb_record.PROCESS_ID'."), |
| 827 | &record_cmdlist); |
| 828 | set_cmd_completer (c, filename_completer); |
| 829 | |
| 830 | add_cmd ("delete", class_obscure, cmd_record_delete, |
| 831 | _("Delete the rest of execution log and start recording it anew."), |
| 832 | &record_cmdlist); |
| 833 | add_alias_cmd ("d", "delete", class_obscure, 1, &record_cmdlist); |
| 834 | add_alias_cmd ("del", "delete", class_obscure, 1, &record_cmdlist); |
| 835 | |
| 836 | add_cmd ("stop", class_obscure, cmd_record_stop, |
| 837 | _("Stop the record/replay target."), |
| 838 | &record_cmdlist); |
| 839 | add_alias_cmd ("s", "stop", class_obscure, 1, &record_cmdlist); |
| 840 | |
| 841 | add_prefix_cmd ("goto", class_obscure, cmd_record_goto, _("\ |
| 842 | Restore the program to its state at instruction number N.\n\ |
| 843 | Argument is instruction number, as shown by 'info record'."), |
| 844 | &record_goto_cmdlist, "record goto ", 1, &record_cmdlist); |
| 845 | |
| 846 | add_cmd ("begin", class_obscure, cmd_record_goto_begin, |
| 847 | _("Go to the beginning of the execution log."), |
| 848 | &record_goto_cmdlist); |
| 849 | add_alias_cmd ("start", "begin", class_obscure, 1, &record_goto_cmdlist); |
| 850 | |
| 851 | add_cmd ("end", class_obscure, cmd_record_goto_end, |
| 852 | _("Go to the end of the execution log."), |
| 853 | &record_goto_cmdlist); |
| 854 | |
| 855 | add_cmd ("instruction-history", class_obscure, cmd_record_insn_history, _("\ |
| 856 | Print disassembled instructions stored in the execution log.\n\ |
| 857 | With a /m or /s modifier, source lines are included (if available).\n\ |
| 858 | With a /r modifier, raw instructions in hex are included.\n\ |
| 859 | With a /f modifier, function names are omitted.\n\ |
| 860 | With a /p modifier, current position markers are omitted.\n\ |
| 861 | With no argument, disassembles ten more instructions after the previous \ |
| 862 | disassembly.\n\ |
| 863 | \"record instruction-history -\" disassembles ten instructions before a \ |
| 864 | previous disassembly.\n\ |
| 865 | One argument specifies an instruction number as shown by 'info record', and \ |
| 866 | ten instructions are disassembled after that instruction.\n\ |
| 867 | Two arguments with comma between them specify starting and ending instruction \ |
| 868 | numbers to disassemble.\n\ |
| 869 | If the second argument is preceded by '+' or '-', it specifies the distance \ |
| 870 | from the first argument.\n\ |
| 871 | The number of instructions to disassemble can be defined with \"set record \ |
| 872 | instruction-history-size\"."), |
| 873 | &record_cmdlist); |
| 874 | |
| 875 | add_cmd ("function-call-history", class_obscure, cmd_record_call_history, _("\ |
| 876 | Prints the execution history at function granularity.\n\ |
| 877 | It prints one line for each sequence of instructions that belong to the same \ |
| 878 | function.\n\ |
| 879 | Without modifiers, it prints the function name.\n\ |
| 880 | With a /l modifier, the source file and line number range is included.\n\ |
| 881 | With a /i modifier, the instruction number range is included.\n\ |
| 882 | With a /c modifier, the output is indented based on the call stack depth.\n\ |
| 883 | With no argument, prints ten more lines after the previous ten-line print.\n\ |
| 884 | \"record function-call-history -\" prints ten lines before a previous ten-line \ |
| 885 | print.\n\ |
| 886 | One argument specifies a function number as shown by 'info record', and \ |
| 887 | ten lines are printed after that function.\n\ |
| 888 | Two arguments with comma between them specify a range of functions to print.\n\ |
| 889 | If the second argument is preceded by '+' or '-', it specifies the distance \ |
| 890 | from the first argument.\n\ |
| 891 | The number of functions to print can be defined with \"set record \ |
| 892 | function-call-history-size\"."), |
| 893 | &record_cmdlist); |
| 894 | |
| 895 | /* Sync command control variables. */ |
| 896 | record_insn_history_size_setshow_var = record_insn_history_size; |
| 897 | record_call_history_size_setshow_var = record_call_history_size; |
| 898 | } |