| 1 | /* Everything about syscall catchpoints, for GDB. |
| 2 | |
| 3 | Copyright (C) 2009-2017 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 <ctype.h> |
| 22 | #include "breakpoint.h" |
| 23 | #include "gdbcmd.h" |
| 24 | #include "inferior.h" |
| 25 | #include "cli/cli-utils.h" |
| 26 | #include "annotate.h" |
| 27 | #include "mi/mi-common.h" |
| 28 | #include "valprint.h" |
| 29 | #include "arch-utils.h" |
| 30 | #include "observer.h" |
| 31 | #include "xml-syscall.h" |
| 32 | |
| 33 | /* An instance of this type is used to represent a syscall catchpoint. |
| 34 | A breakpoint is really of this type iff its ops pointer points to |
| 35 | CATCH_SYSCALL_BREAKPOINT_OPS. */ |
| 36 | |
| 37 | struct syscall_catchpoint : public breakpoint |
| 38 | { |
| 39 | /* Syscall numbers used for the 'catch syscall' feature. If no |
| 40 | syscall has been specified for filtering, it is empty. |
| 41 | Otherwise, it holds a list of all syscalls to be caught. */ |
| 42 | std::vector<int> syscalls_to_be_caught; |
| 43 | }; |
| 44 | |
| 45 | static const struct inferior_data *catch_syscall_inferior_data = NULL; |
| 46 | |
| 47 | struct catch_syscall_inferior_data |
| 48 | { |
| 49 | /* We keep a count of the number of times the user has requested a |
| 50 | particular syscall to be tracked, and pass this information to the |
| 51 | target. This lets capable targets implement filtering directly. */ |
| 52 | |
| 53 | /* Number of times that "any" syscall is requested. */ |
| 54 | int any_syscall_count; |
| 55 | |
| 56 | /* Count of each system call. */ |
| 57 | std::vector<int> syscalls_counts; |
| 58 | |
| 59 | /* This counts all syscall catch requests, so we can readily determine |
| 60 | if any catching is necessary. */ |
| 61 | int total_syscalls_count; |
| 62 | }; |
| 63 | |
| 64 | static struct catch_syscall_inferior_data * |
| 65 | get_catch_syscall_inferior_data (struct inferior *inf) |
| 66 | { |
| 67 | struct catch_syscall_inferior_data *inf_data; |
| 68 | |
| 69 | inf_data = ((struct catch_syscall_inferior_data *) |
| 70 | inferior_data (inf, catch_syscall_inferior_data)); |
| 71 | if (inf_data == NULL) |
| 72 | { |
| 73 | inf_data = new struct catch_syscall_inferior_data (); |
| 74 | set_inferior_data (inf, catch_syscall_inferior_data, inf_data); |
| 75 | } |
| 76 | |
| 77 | return inf_data; |
| 78 | } |
| 79 | |
| 80 | static void |
| 81 | catch_syscall_inferior_data_cleanup (struct inferior *inf, void *arg) |
| 82 | { |
| 83 | struct catch_syscall_inferior_data *inf_data |
| 84 | = (struct catch_syscall_inferior_data *) arg; |
| 85 | delete inf_data; |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /* Implement the "insert" breakpoint_ops method for syscall |
| 90 | catchpoints. */ |
| 91 | |
| 92 | static int |
| 93 | insert_catch_syscall (struct bp_location *bl) |
| 94 | { |
| 95 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; |
| 96 | struct inferior *inf = current_inferior (); |
| 97 | struct catch_syscall_inferior_data *inf_data |
| 98 | = get_catch_syscall_inferior_data (inf); |
| 99 | |
| 100 | ++inf_data->total_syscalls_count; |
| 101 | if (c->syscalls_to_be_caught.empty ()) |
| 102 | ++inf_data->any_syscall_count; |
| 103 | else |
| 104 | { |
| 105 | for (int iter : c->syscalls_to_be_caught) |
| 106 | { |
| 107 | int elem; |
| 108 | |
| 109 | if (iter >= inf_data->syscalls_counts.size ()) |
| 110 | inf_data->syscalls_counts.resize (iter + 1); |
| 111 | ++inf_data->syscalls_counts[iter]; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid), |
| 116 | inf_data->total_syscalls_count != 0, |
| 117 | inf_data->any_syscall_count, |
| 118 | inf_data->syscalls_counts.size (), |
| 119 | inf_data->syscalls_counts.data ()); |
| 120 | } |
| 121 | |
| 122 | /* Implement the "remove" breakpoint_ops method for syscall |
| 123 | catchpoints. */ |
| 124 | |
| 125 | static int |
| 126 | remove_catch_syscall (struct bp_location *bl, enum remove_bp_reason reason) |
| 127 | { |
| 128 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; |
| 129 | struct inferior *inf = current_inferior (); |
| 130 | struct catch_syscall_inferior_data *inf_data |
| 131 | = get_catch_syscall_inferior_data (inf); |
| 132 | |
| 133 | --inf_data->total_syscalls_count; |
| 134 | if (c->syscalls_to_be_caught.empty ()) |
| 135 | --inf_data->any_syscall_count; |
| 136 | else |
| 137 | { |
| 138 | for (int iter : c->syscalls_to_be_caught) |
| 139 | { |
| 140 | int elem; |
| 141 | if (iter >= inf_data->syscalls_counts.size ()) |
| 142 | /* Shouldn't happen. */ |
| 143 | continue; |
| 144 | --inf_data->syscalls_counts[iter]; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid), |
| 149 | inf_data->total_syscalls_count != 0, |
| 150 | inf_data->any_syscall_count, |
| 151 | inf_data->syscalls_counts.size (), |
| 152 | inf_data->syscalls_counts.data ()); |
| 153 | } |
| 154 | |
| 155 | /* Implement the "breakpoint_hit" breakpoint_ops method for syscall |
| 156 | catchpoints. */ |
| 157 | |
| 158 | static int |
| 159 | breakpoint_hit_catch_syscall (const struct bp_location *bl, |
| 160 | struct address_space *aspace, CORE_ADDR bp_addr, |
| 161 | const struct target_waitstatus *ws) |
| 162 | { |
| 163 | /* We must check if we are catching specific syscalls in this |
| 164 | breakpoint. If we are, then we must guarantee that the called |
| 165 | syscall is the same syscall we are catching. */ |
| 166 | int syscall_number = 0; |
| 167 | const struct syscall_catchpoint *c |
| 168 | = (const struct syscall_catchpoint *) bl->owner; |
| 169 | |
| 170 | if (ws->kind != TARGET_WAITKIND_SYSCALL_ENTRY |
| 171 | && ws->kind != TARGET_WAITKIND_SYSCALL_RETURN) |
| 172 | return 0; |
| 173 | |
| 174 | syscall_number = ws->value.syscall_number; |
| 175 | |
| 176 | /* Now, checking if the syscall is the same. */ |
| 177 | if (!c->syscalls_to_be_caught.empty ()) |
| 178 | { |
| 179 | for (int iter : c->syscalls_to_be_caught) |
| 180 | if (syscall_number == iter) |
| 181 | return 1; |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | return 1; |
| 187 | } |
| 188 | |
| 189 | /* Implement the "print_it" breakpoint_ops method for syscall |
| 190 | catchpoints. */ |
| 191 | |
| 192 | static enum print_stop_action |
| 193 | print_it_catch_syscall (bpstat bs) |
| 194 | { |
| 195 | struct ui_out *uiout = current_uiout; |
| 196 | struct breakpoint *b = bs->breakpoint_at; |
| 197 | /* These are needed because we want to know in which state a |
| 198 | syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY |
| 199 | or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we |
| 200 | must print "called syscall" or "returned from syscall". */ |
| 201 | ptid_t ptid; |
| 202 | struct target_waitstatus last; |
| 203 | struct syscall s; |
| 204 | struct gdbarch *gdbarch = bs->bp_location_at->gdbarch; |
| 205 | |
| 206 | get_last_target_status (&ptid, &last); |
| 207 | |
| 208 | get_syscall_by_number (gdbarch, last.value.syscall_number, &s); |
| 209 | |
| 210 | annotate_catchpoint (b->number); |
| 211 | maybe_print_thread_hit_breakpoint (uiout); |
| 212 | |
| 213 | if (b->disposition == disp_del) |
| 214 | uiout->text ("Temporary catchpoint "); |
| 215 | else |
| 216 | uiout->text ("Catchpoint "); |
| 217 | if (uiout->is_mi_like_p ()) |
| 218 | { |
| 219 | uiout->field_string ("reason", |
| 220 | async_reason_lookup (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY |
| 221 | ? EXEC_ASYNC_SYSCALL_ENTRY |
| 222 | : EXEC_ASYNC_SYSCALL_RETURN)); |
| 223 | uiout->field_string ("disp", bpdisp_text (b->disposition)); |
| 224 | } |
| 225 | uiout->field_int ("bkptno", b->number); |
| 226 | |
| 227 | if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY) |
| 228 | uiout->text (" (call to syscall "); |
| 229 | else |
| 230 | uiout->text (" (returned from syscall "); |
| 231 | |
| 232 | if (s.name == NULL || uiout->is_mi_like_p ()) |
| 233 | uiout->field_int ("syscall-number", last.value.syscall_number); |
| 234 | if (s.name != NULL) |
| 235 | uiout->field_string ("syscall-name", s.name); |
| 236 | |
| 237 | uiout->text ("), "); |
| 238 | |
| 239 | return PRINT_SRC_AND_LOC; |
| 240 | } |
| 241 | |
| 242 | /* Implement the "print_one" breakpoint_ops method for syscall |
| 243 | catchpoints. */ |
| 244 | |
| 245 | static void |
| 246 | print_one_catch_syscall (struct breakpoint *b, |
| 247 | struct bp_location **last_loc) |
| 248 | { |
| 249 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 250 | struct value_print_options opts; |
| 251 | struct ui_out *uiout = current_uiout; |
| 252 | struct gdbarch *gdbarch = b->loc->gdbarch; |
| 253 | |
| 254 | get_user_print_options (&opts); |
| 255 | /* Field 4, the address, is omitted (which makes the columns not |
| 256 | line up too nicely with the headers, but the effect is relatively |
| 257 | readable). */ |
| 258 | if (opts.addressprint) |
| 259 | uiout->field_skip ("addr"); |
| 260 | annotate_field (5); |
| 261 | |
| 262 | if (c->syscalls_to_be_caught.size () > 1) |
| 263 | uiout->text ("syscalls \""); |
| 264 | else |
| 265 | uiout->text ("syscall \""); |
| 266 | |
| 267 | if (!c->syscalls_to_be_caught.empty ()) |
| 268 | { |
| 269 | char *text = xstrprintf ("%s", ""); |
| 270 | |
| 271 | for (int iter : c->syscalls_to_be_caught) |
| 272 | { |
| 273 | char *x = text; |
| 274 | struct syscall s; |
| 275 | get_syscall_by_number (gdbarch, iter, &s); |
| 276 | |
| 277 | if (s.name != NULL) |
| 278 | text = xstrprintf ("%s%s, ", text, s.name); |
| 279 | else |
| 280 | text = xstrprintf ("%s%d, ", text, iter); |
| 281 | |
| 282 | /* We have to xfree the last 'text' (now stored at 'x') |
| 283 | because xstrprintf dynamically allocates new space for it |
| 284 | on every call. */ |
| 285 | xfree (x); |
| 286 | } |
| 287 | /* Remove the last comma. */ |
| 288 | text[strlen (text) - 2] = '\0'; |
| 289 | uiout->field_string ("what", text); |
| 290 | } |
| 291 | else |
| 292 | uiout->field_string ("what", "<any syscall>"); |
| 293 | uiout->text ("\" "); |
| 294 | |
| 295 | if (uiout->is_mi_like_p ()) |
| 296 | uiout->field_string ("catch-type", "syscall"); |
| 297 | } |
| 298 | |
| 299 | /* Implement the "print_mention" breakpoint_ops method for syscall |
| 300 | catchpoints. */ |
| 301 | |
| 302 | static void |
| 303 | print_mention_catch_syscall (struct breakpoint *b) |
| 304 | { |
| 305 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 306 | struct gdbarch *gdbarch = b->loc->gdbarch; |
| 307 | |
| 308 | if (!c->syscalls_to_be_caught.empty ()) |
| 309 | { |
| 310 | if (c->syscalls_to_be_caught.size () > 1) |
| 311 | printf_filtered (_("Catchpoint %d (syscalls"), b->number); |
| 312 | else |
| 313 | printf_filtered (_("Catchpoint %d (syscall"), b->number); |
| 314 | |
| 315 | for (int iter : c->syscalls_to_be_caught) |
| 316 | { |
| 317 | struct syscall s; |
| 318 | get_syscall_by_number (gdbarch, iter, &s); |
| 319 | |
| 320 | if (s.name != NULL) |
| 321 | printf_filtered (" '%s' [%d]", s.name, s.number); |
| 322 | else |
| 323 | printf_filtered (" %d", s.number); |
| 324 | } |
| 325 | printf_filtered (")"); |
| 326 | } |
| 327 | else |
| 328 | printf_filtered (_("Catchpoint %d (any syscall)"), |
| 329 | b->number); |
| 330 | } |
| 331 | |
| 332 | /* Implement the "print_recreate" breakpoint_ops method for syscall |
| 333 | catchpoints. */ |
| 334 | |
| 335 | static void |
| 336 | print_recreate_catch_syscall (struct breakpoint *b, struct ui_file *fp) |
| 337 | { |
| 338 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 339 | struct gdbarch *gdbarch = b->loc->gdbarch; |
| 340 | |
| 341 | fprintf_unfiltered (fp, "catch syscall"); |
| 342 | |
| 343 | for (int iter : c->syscalls_to_be_caught) |
| 344 | { |
| 345 | struct syscall s; |
| 346 | |
| 347 | get_syscall_by_number (gdbarch, iter, &s); |
| 348 | if (s.name != NULL) |
| 349 | fprintf_unfiltered (fp, " %s", s.name); |
| 350 | else |
| 351 | fprintf_unfiltered (fp, " %d", s.number); |
| 352 | } |
| 353 | |
| 354 | print_recreate_thread (b, fp); |
| 355 | } |
| 356 | |
| 357 | /* The breakpoint_ops structure to be used in syscall catchpoints. */ |
| 358 | |
| 359 | static struct breakpoint_ops catch_syscall_breakpoint_ops; |
| 360 | |
| 361 | /* Returns non-zero if 'b' is a syscall catchpoint. */ |
| 362 | |
| 363 | static int |
| 364 | syscall_catchpoint_p (struct breakpoint *b) |
| 365 | { |
| 366 | return (b->ops == &catch_syscall_breakpoint_ops); |
| 367 | } |
| 368 | |
| 369 | static void |
| 370 | create_syscall_event_catchpoint (int tempflag, std::vector<int> &&filter, |
| 371 | const struct breakpoint_ops *ops) |
| 372 | { |
| 373 | struct gdbarch *gdbarch = get_current_arch (); |
| 374 | |
| 375 | std::unique_ptr<syscall_catchpoint> c (new syscall_catchpoint ()); |
| 376 | init_catchpoint (c.get (), gdbarch, tempflag, NULL, ops); |
| 377 | c->syscalls_to_be_caught = std::move (filter); |
| 378 | |
| 379 | install_breakpoint (0, std::move (c), 1); |
| 380 | } |
| 381 | |
| 382 | /* Splits the argument using space as delimiter. */ |
| 383 | |
| 384 | static std::vector<int> |
| 385 | catch_syscall_split_args (char *arg) |
| 386 | { |
| 387 | std::vector<int> result; |
| 388 | struct gdbarch *gdbarch = target_gdbarch (); |
| 389 | |
| 390 | while (*arg != '\0') |
| 391 | { |
| 392 | int i, syscall_number; |
| 393 | char *endptr; |
| 394 | char cur_name[128]; |
| 395 | struct syscall s; |
| 396 | |
| 397 | /* Skip whitespace. */ |
| 398 | arg = skip_spaces (arg); |
| 399 | |
| 400 | for (i = 0; i < 127 && arg[i] && !isspace (arg[i]); ++i) |
| 401 | cur_name[i] = arg[i]; |
| 402 | cur_name[i] = '\0'; |
| 403 | arg += i; |
| 404 | |
| 405 | /* Check if the user provided a syscall name, group, or a number. */ |
| 406 | syscall_number = (int) strtol (cur_name, &endptr, 0); |
| 407 | if (*endptr == '\0') |
| 408 | { |
| 409 | get_syscall_by_number (gdbarch, syscall_number, &s); |
| 410 | result.push_back (s.number); |
| 411 | } |
| 412 | else if (startswith (cur_name, "g:") |
| 413 | || startswith (cur_name, "group:")) |
| 414 | { |
| 415 | /* We have a syscall group. Let's expand it into a syscall |
| 416 | list before inserting. */ |
| 417 | struct syscall *syscall_list; |
| 418 | const char *group_name; |
| 419 | |
| 420 | /* Skip over "g:" and "group:" prefix strings. */ |
| 421 | group_name = strchr (cur_name, ':') + 1; |
| 422 | |
| 423 | syscall_list = get_syscalls_by_group (gdbarch, group_name); |
| 424 | |
| 425 | if (syscall_list == NULL) |
| 426 | error (_("Unknown syscall group '%s'."), group_name); |
| 427 | |
| 428 | for (i = 0; syscall_list[i].name != NULL; i++) |
| 429 | { |
| 430 | /* Insert each syscall that are part of the group. No |
| 431 | need to check if it is valid. */ |
| 432 | result.push_back (syscall_list[i].number); |
| 433 | } |
| 434 | |
| 435 | xfree (syscall_list); |
| 436 | } |
| 437 | else |
| 438 | { |
| 439 | /* We have a name. Let's check if it's valid and convert it |
| 440 | to a number. */ |
| 441 | get_syscall_by_name (gdbarch, cur_name, &s); |
| 442 | |
| 443 | if (s.number == UNKNOWN_SYSCALL) |
| 444 | /* Here we have to issue an error instead of a warning, |
| 445 | because GDB cannot do anything useful if there's no |
| 446 | syscall number to be caught. */ |
| 447 | error (_("Unknown syscall name '%s'."), cur_name); |
| 448 | |
| 449 | /* Ok, it's valid. */ |
| 450 | result.push_back (s.number); |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | return result; |
| 455 | } |
| 456 | |
| 457 | /* Implement the "catch syscall" command. */ |
| 458 | |
| 459 | static void |
| 460 | catch_syscall_command_1 (char *arg, int from_tty, |
| 461 | struct cmd_list_element *command) |
| 462 | { |
| 463 | int tempflag; |
| 464 | std::vector<int> filter; |
| 465 | struct syscall s; |
| 466 | struct gdbarch *gdbarch = get_current_arch (); |
| 467 | |
| 468 | /* Checking if the feature if supported. */ |
| 469 | if (gdbarch_get_syscall_number_p (gdbarch) == 0) |
| 470 | error (_("The feature 'catch syscall' is not supported on \ |
| 471 | this architecture yet.")); |
| 472 | |
| 473 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 474 | |
| 475 | arg = skip_spaces (arg); |
| 476 | |
| 477 | /* We need to do this first "dummy" translation in order |
| 478 | to get the syscall XML file loaded or, most important, |
| 479 | to display a warning to the user if there's no XML file |
| 480 | for his/her architecture. */ |
| 481 | get_syscall_by_number (gdbarch, 0, &s); |
| 482 | |
| 483 | /* The allowed syntax is: |
| 484 | catch syscall |
| 485 | catch syscall <name | number> [<name | number> ... <name | number>] |
| 486 | |
| 487 | Let's check if there's a syscall name. */ |
| 488 | |
| 489 | if (arg != NULL) |
| 490 | filter = catch_syscall_split_args (arg); |
| 491 | |
| 492 | create_syscall_event_catchpoint (tempflag, std::move (filter), |
| 493 | &catch_syscall_breakpoint_ops); |
| 494 | } |
| 495 | |
| 496 | |
| 497 | /* Returns 0 if 'bp' is NOT a syscall catchpoint, |
| 498 | non-zero otherwise. */ |
| 499 | static int |
| 500 | is_syscall_catchpoint_enabled (struct breakpoint *bp) |
| 501 | { |
| 502 | if (syscall_catchpoint_p (bp) |
| 503 | && bp->enable_state != bp_disabled |
| 504 | && bp->enable_state != bp_call_disabled) |
| 505 | return 1; |
| 506 | else |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | int |
| 511 | catch_syscall_enabled (void) |
| 512 | { |
| 513 | struct catch_syscall_inferior_data *inf_data |
| 514 | = get_catch_syscall_inferior_data (current_inferior ()); |
| 515 | |
| 516 | return inf_data->total_syscalls_count != 0; |
| 517 | } |
| 518 | |
| 519 | /* Helper function for catching_syscall_number. If B is a syscall |
| 520 | catchpoint for SYSCALL_NUMBER, return 1 (which will make |
| 521 | 'breakpoint_find_if' return). Otherwise, return 0. */ |
| 522 | |
| 523 | static int |
| 524 | catching_syscall_number_1 (struct breakpoint *b, |
| 525 | void *data) |
| 526 | { |
| 527 | int syscall_number = (int) (uintptr_t) data; |
| 528 | |
| 529 | if (is_syscall_catchpoint_enabled (b)) |
| 530 | { |
| 531 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 532 | |
| 533 | if (!c->syscalls_to_be_caught.empty ()) |
| 534 | { |
| 535 | for (int iter : c->syscalls_to_be_caught) |
| 536 | if (syscall_number == iter) |
| 537 | return 1; |
| 538 | } |
| 539 | else |
| 540 | return 1; |
| 541 | } |
| 542 | |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | int |
| 547 | catching_syscall_number (int syscall_number) |
| 548 | { |
| 549 | struct breakpoint *b = breakpoint_find_if (catching_syscall_number_1, |
| 550 | (void *) (uintptr_t) syscall_number); |
| 551 | |
| 552 | return b != NULL; |
| 553 | } |
| 554 | |
| 555 | /* Complete syscall names. Used by "catch syscall". */ |
| 556 | |
| 557 | static void |
| 558 | catch_syscall_completer (struct cmd_list_element *cmd, |
| 559 | completion_tracker &tracker, |
| 560 | const char *text, const char *word) |
| 561 | { |
| 562 | struct gdbarch *gdbarch = get_current_arch (); |
| 563 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
| 564 | const char **group_list = NULL; |
| 565 | const char **syscall_list = NULL; |
| 566 | const char *prefix; |
| 567 | int i; |
| 568 | |
| 569 | /* Completion considers ':' to be a word separator, so we use this to |
| 570 | verify whether the previous word was a group prefix. If so, we |
| 571 | build the completion list using group names only. */ |
| 572 | for (prefix = word; prefix != text && prefix[-1] != ' '; prefix--) |
| 573 | ; |
| 574 | |
| 575 | if (startswith (prefix, "g:") || startswith (prefix, "group:")) |
| 576 | { |
| 577 | /* Perform completion inside 'group:' namespace only. */ |
| 578 | group_list = get_syscall_group_names (gdbarch); |
| 579 | if (group_list != NULL) |
| 580 | complete_on_enum (tracker, group_list, word, word); |
| 581 | } |
| 582 | else |
| 583 | { |
| 584 | /* Complete with both, syscall names and groups. */ |
| 585 | syscall_list = get_syscall_names (gdbarch); |
| 586 | group_list = get_syscall_group_names (gdbarch); |
| 587 | |
| 588 | /* Append "group:" prefix to syscall groups. */ |
| 589 | for (i = 0; group_list[i] != NULL; i++) |
| 590 | { |
| 591 | char *prefixed_group = xstrprintf ("group:%s", group_list[i]); |
| 592 | |
| 593 | group_list[i] = prefixed_group; |
| 594 | make_cleanup (xfree, prefixed_group); |
| 595 | } |
| 596 | |
| 597 | if (syscall_list != NULL) |
| 598 | complete_on_enum (tracker, syscall_list, word, word); |
| 599 | if (group_list != NULL) |
| 600 | complete_on_enum (tracker, group_list, word, word); |
| 601 | } |
| 602 | |
| 603 | xfree (syscall_list); |
| 604 | xfree (group_list); |
| 605 | do_cleanups (cleanups); |
| 606 | } |
| 607 | |
| 608 | static void |
| 609 | clear_syscall_counts (struct inferior *inf) |
| 610 | { |
| 611 | struct catch_syscall_inferior_data *inf_data |
| 612 | = get_catch_syscall_inferior_data (inf); |
| 613 | |
| 614 | inf_data->total_syscalls_count = 0; |
| 615 | inf_data->any_syscall_count = 0; |
| 616 | inf_data->syscalls_counts.clear (); |
| 617 | } |
| 618 | |
| 619 | static void |
| 620 | initialize_syscall_catchpoint_ops (void) |
| 621 | { |
| 622 | struct breakpoint_ops *ops; |
| 623 | |
| 624 | initialize_breakpoint_ops (); |
| 625 | |
| 626 | /* Syscall catchpoints. */ |
| 627 | ops = &catch_syscall_breakpoint_ops; |
| 628 | *ops = base_breakpoint_ops; |
| 629 | ops->insert_location = insert_catch_syscall; |
| 630 | ops->remove_location = remove_catch_syscall; |
| 631 | ops->breakpoint_hit = breakpoint_hit_catch_syscall; |
| 632 | ops->print_it = print_it_catch_syscall; |
| 633 | ops->print_one = print_one_catch_syscall; |
| 634 | ops->print_mention = print_mention_catch_syscall; |
| 635 | ops->print_recreate = print_recreate_catch_syscall; |
| 636 | } |
| 637 | |
| 638 | void |
| 639 | _initialize_break_catch_syscall (void) |
| 640 | { |
| 641 | initialize_syscall_catchpoint_ops (); |
| 642 | |
| 643 | observer_attach_inferior_exit (clear_syscall_counts); |
| 644 | catch_syscall_inferior_data |
| 645 | = register_inferior_data_with_cleanup (NULL, |
| 646 | catch_syscall_inferior_data_cleanup); |
| 647 | |
| 648 | add_catch_command ("syscall", _("\ |
| 649 | Catch system calls by their names, groups and/or numbers.\n\ |
| 650 | Arguments say which system calls to catch. If no arguments are given,\n\ |
| 651 | every system call will be caught. Arguments, if given, should be one\n\ |
| 652 | or more system call names (if your system supports that), system call\n\ |
| 653 | groups or system call numbers."), |
| 654 | catch_syscall_command_1, |
| 655 | catch_syscall_completer, |
| 656 | CATCH_PERMANENT, |
| 657 | CATCH_TEMPORARY); |
| 658 | } |