| 1 | /* Everything about syscall catchpoints, for GDB. |
| 2 | |
| 3 | Copyright (C) 2009-2016 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 | It includes a "struct breakpoint" as a kind of base class; users |
| 35 | downcast to "struct breakpoint *" when needed. A breakpoint is |
| 36 | really of this type iff its ops pointer points to |
| 37 | CATCH_SYSCALL_BREAKPOINT_OPS. */ |
| 38 | |
| 39 | struct syscall_catchpoint |
| 40 | { |
| 41 | /* The base class. */ |
| 42 | struct breakpoint base; |
| 43 | |
| 44 | /* Syscall numbers used for the 'catch syscall' feature. If no |
| 45 | syscall has been specified for filtering, its value is NULL. |
| 46 | Otherwise, it holds a list of all syscalls to be caught. The |
| 47 | list elements are allocated with xmalloc. */ |
| 48 | VEC(int) *syscalls_to_be_caught; |
| 49 | }; |
| 50 | |
| 51 | /* Implement the "dtor" breakpoint_ops method for syscall |
| 52 | catchpoints. */ |
| 53 | |
| 54 | static void |
| 55 | dtor_catch_syscall (struct breakpoint *b) |
| 56 | { |
| 57 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 58 | |
| 59 | VEC_free (int, c->syscalls_to_be_caught); |
| 60 | |
| 61 | base_breakpoint_ops.dtor (b); |
| 62 | } |
| 63 | |
| 64 | static const struct inferior_data *catch_syscall_inferior_data = NULL; |
| 65 | |
| 66 | struct catch_syscall_inferior_data |
| 67 | { |
| 68 | /* We keep a count of the number of times the user has requested a |
| 69 | particular syscall to be tracked, and pass this information to the |
| 70 | target. This lets capable targets implement filtering directly. */ |
| 71 | |
| 72 | /* Number of times that "any" syscall is requested. */ |
| 73 | int any_syscall_count; |
| 74 | |
| 75 | /* Count of each system call. */ |
| 76 | VEC(int) *syscalls_counts; |
| 77 | |
| 78 | /* This counts all syscall catch requests, so we can readily determine |
| 79 | if any catching is necessary. */ |
| 80 | int total_syscalls_count; |
| 81 | }; |
| 82 | |
| 83 | static struct catch_syscall_inferior_data* |
| 84 | get_catch_syscall_inferior_data (struct inferior *inf) |
| 85 | { |
| 86 | struct catch_syscall_inferior_data *inf_data; |
| 87 | |
| 88 | inf_data = ((struct catch_syscall_inferior_data *) |
| 89 | inferior_data (inf, catch_syscall_inferior_data)); |
| 90 | if (inf_data == NULL) |
| 91 | { |
| 92 | inf_data = XCNEW (struct catch_syscall_inferior_data); |
| 93 | set_inferior_data (inf, catch_syscall_inferior_data, inf_data); |
| 94 | } |
| 95 | |
| 96 | return inf_data; |
| 97 | } |
| 98 | |
| 99 | static void |
| 100 | catch_syscall_inferior_data_cleanup (struct inferior *inf, void *arg) |
| 101 | { |
| 102 | xfree (arg); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | /* Implement the "insert" breakpoint_ops method for syscall |
| 107 | catchpoints. */ |
| 108 | |
| 109 | static int |
| 110 | insert_catch_syscall (struct bp_location *bl) |
| 111 | { |
| 112 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; |
| 113 | struct inferior *inf = current_inferior (); |
| 114 | struct catch_syscall_inferior_data *inf_data |
| 115 | = get_catch_syscall_inferior_data (inf); |
| 116 | |
| 117 | ++inf_data->total_syscalls_count; |
| 118 | if (!c->syscalls_to_be_caught) |
| 119 | ++inf_data->any_syscall_count; |
| 120 | else |
| 121 | { |
| 122 | int i, iter; |
| 123 | |
| 124 | for (i = 0; |
| 125 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 126 | i++) |
| 127 | { |
| 128 | int elem; |
| 129 | |
| 130 | if (iter >= VEC_length (int, inf_data->syscalls_counts)) |
| 131 | { |
| 132 | int old_size = VEC_length (int, inf_data->syscalls_counts); |
| 133 | uintptr_t vec_addr_offset |
| 134 | = old_size * ((uintptr_t) sizeof (int)); |
| 135 | uintptr_t vec_addr; |
| 136 | VEC_safe_grow (int, inf_data->syscalls_counts, iter + 1); |
| 137 | vec_addr = ((uintptr_t) VEC_address (int, |
| 138 | inf_data->syscalls_counts) |
| 139 | + vec_addr_offset); |
| 140 | memset ((void *) vec_addr, 0, |
| 141 | (iter + 1 - old_size) * sizeof (int)); |
| 142 | } |
| 143 | elem = VEC_index (int, inf_data->syscalls_counts, iter); |
| 144 | VEC_replace (int, inf_data->syscalls_counts, iter, ++elem); |
| 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 | VEC_length (int, |
| 152 | inf_data->syscalls_counts), |
| 153 | VEC_address (int, |
| 154 | inf_data->syscalls_counts)); |
| 155 | } |
| 156 | |
| 157 | /* Implement the "remove" breakpoint_ops method for syscall |
| 158 | catchpoints. */ |
| 159 | |
| 160 | static int |
| 161 | remove_catch_syscall (struct bp_location *bl) |
| 162 | { |
| 163 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; |
| 164 | struct inferior *inf = current_inferior (); |
| 165 | struct catch_syscall_inferior_data *inf_data |
| 166 | = get_catch_syscall_inferior_data (inf); |
| 167 | |
| 168 | --inf_data->total_syscalls_count; |
| 169 | if (!c->syscalls_to_be_caught) |
| 170 | --inf_data->any_syscall_count; |
| 171 | else |
| 172 | { |
| 173 | int i, iter; |
| 174 | |
| 175 | for (i = 0; |
| 176 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 177 | i++) |
| 178 | { |
| 179 | int elem; |
| 180 | if (iter >= VEC_length (int, inf_data->syscalls_counts)) |
| 181 | /* Shouldn't happen. */ |
| 182 | continue; |
| 183 | elem = VEC_index (int, inf_data->syscalls_counts, iter); |
| 184 | VEC_replace (int, inf_data->syscalls_counts, iter, --elem); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | return target_set_syscall_catchpoint (ptid_get_pid (inferior_ptid), |
| 189 | inf_data->total_syscalls_count != 0, |
| 190 | inf_data->any_syscall_count, |
| 191 | VEC_length (int, |
| 192 | inf_data->syscalls_counts), |
| 193 | VEC_address (int, |
| 194 | inf_data->syscalls_counts)); |
| 195 | } |
| 196 | |
| 197 | /* Implement the "breakpoint_hit" breakpoint_ops method for syscall |
| 198 | catchpoints. */ |
| 199 | |
| 200 | static int |
| 201 | breakpoint_hit_catch_syscall (const struct bp_location *bl, |
| 202 | struct address_space *aspace, CORE_ADDR bp_addr, |
| 203 | const struct target_waitstatus *ws) |
| 204 | { |
| 205 | /* We must check if we are catching specific syscalls in this |
| 206 | breakpoint. If we are, then we must guarantee that the called |
| 207 | syscall is the same syscall we are catching. */ |
| 208 | int syscall_number = 0; |
| 209 | const struct syscall_catchpoint *c |
| 210 | = (const struct syscall_catchpoint *) bl->owner; |
| 211 | |
| 212 | if (ws->kind != TARGET_WAITKIND_SYSCALL_ENTRY |
| 213 | && ws->kind != TARGET_WAITKIND_SYSCALL_RETURN) |
| 214 | return 0; |
| 215 | |
| 216 | syscall_number = ws->value.syscall_number; |
| 217 | |
| 218 | /* Now, checking if the syscall is the same. */ |
| 219 | if (c->syscalls_to_be_caught) |
| 220 | { |
| 221 | int i, iter; |
| 222 | |
| 223 | for (i = 0; |
| 224 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 225 | i++) |
| 226 | if (syscall_number == iter) |
| 227 | return 1; |
| 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | return 1; |
| 233 | } |
| 234 | |
| 235 | /* Implement the "print_it" breakpoint_ops method for syscall |
| 236 | catchpoints. */ |
| 237 | |
| 238 | static enum print_stop_action |
| 239 | print_it_catch_syscall (bpstat bs) |
| 240 | { |
| 241 | struct ui_out *uiout = current_uiout; |
| 242 | struct breakpoint *b = bs->breakpoint_at; |
| 243 | /* These are needed because we want to know in which state a |
| 244 | syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY |
| 245 | or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we |
| 246 | must print "called syscall" or "returned from syscall". */ |
| 247 | ptid_t ptid; |
| 248 | struct target_waitstatus last; |
| 249 | struct syscall s; |
| 250 | struct gdbarch *gdbarch = bs->bp_location_at->gdbarch; |
| 251 | |
| 252 | get_last_target_status (&ptid, &last); |
| 253 | |
| 254 | get_syscall_by_number (gdbarch, last.value.syscall_number, &s); |
| 255 | |
| 256 | annotate_catchpoint (b->number); |
| 257 | maybe_print_thread_hit_breakpoint (uiout); |
| 258 | |
| 259 | if (b->disposition == disp_del) |
| 260 | ui_out_text (uiout, "Temporary catchpoint "); |
| 261 | else |
| 262 | ui_out_text (uiout, "Catchpoint "); |
| 263 | if (ui_out_is_mi_like_p (uiout)) |
| 264 | { |
| 265 | ui_out_field_string (uiout, "reason", |
| 266 | async_reason_lookup (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY |
| 267 | ? EXEC_ASYNC_SYSCALL_ENTRY |
| 268 | : EXEC_ASYNC_SYSCALL_RETURN)); |
| 269 | ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition)); |
| 270 | } |
| 271 | ui_out_field_int (uiout, "bkptno", b->number); |
| 272 | |
| 273 | if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY) |
| 274 | ui_out_text (uiout, " (call to syscall "); |
| 275 | else |
| 276 | ui_out_text (uiout, " (returned from syscall "); |
| 277 | |
| 278 | if (s.name == NULL || ui_out_is_mi_like_p (uiout)) |
| 279 | ui_out_field_int (uiout, "syscall-number", last.value.syscall_number); |
| 280 | if (s.name != NULL) |
| 281 | ui_out_field_string (uiout, "syscall-name", s.name); |
| 282 | |
| 283 | ui_out_text (uiout, "), "); |
| 284 | |
| 285 | return PRINT_SRC_AND_LOC; |
| 286 | } |
| 287 | |
| 288 | /* Implement the "print_one" breakpoint_ops method for syscall |
| 289 | catchpoints. */ |
| 290 | |
| 291 | static void |
| 292 | print_one_catch_syscall (struct breakpoint *b, |
| 293 | struct bp_location **last_loc) |
| 294 | { |
| 295 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 296 | struct value_print_options opts; |
| 297 | struct ui_out *uiout = current_uiout; |
| 298 | struct gdbarch *gdbarch = b->loc->gdbarch; |
| 299 | |
| 300 | get_user_print_options (&opts); |
| 301 | /* Field 4, the address, is omitted (which makes the columns not |
| 302 | line up too nicely with the headers, but the effect is relatively |
| 303 | readable). */ |
| 304 | if (opts.addressprint) |
| 305 | ui_out_field_skip (uiout, "addr"); |
| 306 | annotate_field (5); |
| 307 | |
| 308 | if (c->syscalls_to_be_caught |
| 309 | && VEC_length (int, c->syscalls_to_be_caught) > 1) |
| 310 | ui_out_text (uiout, "syscalls \""); |
| 311 | else |
| 312 | ui_out_text (uiout, "syscall \""); |
| 313 | |
| 314 | if (c->syscalls_to_be_caught) |
| 315 | { |
| 316 | int i, iter; |
| 317 | char *text = xstrprintf ("%s", ""); |
| 318 | |
| 319 | for (i = 0; |
| 320 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 321 | i++) |
| 322 | { |
| 323 | char *x = text; |
| 324 | struct syscall s; |
| 325 | get_syscall_by_number (gdbarch, iter, &s); |
| 326 | |
| 327 | if (s.name != NULL) |
| 328 | text = xstrprintf ("%s%s, ", text, s.name); |
| 329 | else |
| 330 | text = xstrprintf ("%s%d, ", text, iter); |
| 331 | |
| 332 | /* We have to xfree the last 'text' (now stored at 'x') |
| 333 | because xstrprintf dynamically allocates new space for it |
| 334 | on every call. */ |
| 335 | xfree (x); |
| 336 | } |
| 337 | /* Remove the last comma. */ |
| 338 | text[strlen (text) - 2] = '\0'; |
| 339 | ui_out_field_string (uiout, "what", text); |
| 340 | } |
| 341 | else |
| 342 | ui_out_field_string (uiout, "what", "<any syscall>"); |
| 343 | ui_out_text (uiout, "\" "); |
| 344 | |
| 345 | if (ui_out_is_mi_like_p (uiout)) |
| 346 | ui_out_field_string (uiout, "catch-type", "syscall"); |
| 347 | } |
| 348 | |
| 349 | /* Implement the "print_mention" breakpoint_ops method for syscall |
| 350 | catchpoints. */ |
| 351 | |
| 352 | static void |
| 353 | print_mention_catch_syscall (struct breakpoint *b) |
| 354 | { |
| 355 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 356 | struct gdbarch *gdbarch = b->loc->gdbarch; |
| 357 | |
| 358 | if (c->syscalls_to_be_caught) |
| 359 | { |
| 360 | int i, iter; |
| 361 | |
| 362 | if (VEC_length (int, c->syscalls_to_be_caught) > 1) |
| 363 | printf_filtered (_("Catchpoint %d (syscalls"), b->number); |
| 364 | else |
| 365 | printf_filtered (_("Catchpoint %d (syscall"), b->number); |
| 366 | |
| 367 | for (i = 0; |
| 368 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 369 | i++) |
| 370 | { |
| 371 | struct syscall s; |
| 372 | get_syscall_by_number (gdbarch, iter, &s); |
| 373 | |
| 374 | if (s.name) |
| 375 | printf_filtered (" '%s' [%d]", s.name, s.number); |
| 376 | else |
| 377 | printf_filtered (" %d", s.number); |
| 378 | } |
| 379 | printf_filtered (")"); |
| 380 | } |
| 381 | else |
| 382 | printf_filtered (_("Catchpoint %d (any syscall)"), |
| 383 | b->number); |
| 384 | } |
| 385 | |
| 386 | /* Implement the "print_recreate" breakpoint_ops method for syscall |
| 387 | catchpoints. */ |
| 388 | |
| 389 | static void |
| 390 | print_recreate_catch_syscall (struct breakpoint *b, struct ui_file *fp) |
| 391 | { |
| 392 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 393 | struct gdbarch *gdbarch = b->loc->gdbarch; |
| 394 | |
| 395 | fprintf_unfiltered (fp, "catch syscall"); |
| 396 | |
| 397 | if (c->syscalls_to_be_caught) |
| 398 | { |
| 399 | int i, iter; |
| 400 | |
| 401 | for (i = 0; |
| 402 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 403 | i++) |
| 404 | { |
| 405 | struct syscall s; |
| 406 | |
| 407 | get_syscall_by_number (gdbarch, iter, &s); |
| 408 | if (s.name) |
| 409 | fprintf_unfiltered (fp, " %s", s.name); |
| 410 | else |
| 411 | fprintf_unfiltered (fp, " %d", s.number); |
| 412 | } |
| 413 | } |
| 414 | print_recreate_thread (b, fp); |
| 415 | } |
| 416 | |
| 417 | /* The breakpoint_ops structure to be used in syscall catchpoints. */ |
| 418 | |
| 419 | static struct breakpoint_ops catch_syscall_breakpoint_ops; |
| 420 | |
| 421 | /* Returns non-zero if 'b' is a syscall catchpoint. */ |
| 422 | |
| 423 | static int |
| 424 | syscall_catchpoint_p (struct breakpoint *b) |
| 425 | { |
| 426 | return (b->ops == &catch_syscall_breakpoint_ops); |
| 427 | } |
| 428 | |
| 429 | static void |
| 430 | create_syscall_event_catchpoint (int tempflag, VEC(int) *filter, |
| 431 | const struct breakpoint_ops *ops) |
| 432 | { |
| 433 | struct syscall_catchpoint *c; |
| 434 | struct gdbarch *gdbarch = get_current_arch (); |
| 435 | |
| 436 | c = XNEW (struct syscall_catchpoint); |
| 437 | init_catchpoint (&c->base, gdbarch, tempflag, NULL, ops); |
| 438 | c->syscalls_to_be_caught = filter; |
| 439 | |
| 440 | install_breakpoint (0, &c->base, 1); |
| 441 | } |
| 442 | |
| 443 | /* Splits the argument using space as delimiter. Returns an xmalloc'd |
| 444 | filter list, or NULL if no filtering is required. */ |
| 445 | static VEC(int) * |
| 446 | catch_syscall_split_args (char *arg) |
| 447 | { |
| 448 | VEC(int) *result = NULL; |
| 449 | struct cleanup *cleanup = make_cleanup (VEC_cleanup (int), &result); |
| 450 | struct gdbarch *gdbarch = target_gdbarch (); |
| 451 | |
| 452 | while (*arg != '\0') |
| 453 | { |
| 454 | int i, syscall_number; |
| 455 | char *endptr; |
| 456 | char cur_name[128]; |
| 457 | struct syscall s; |
| 458 | |
| 459 | /* Skip whitespace. */ |
| 460 | arg = skip_spaces (arg); |
| 461 | |
| 462 | for (i = 0; i < 127 && arg[i] && !isspace (arg[i]); ++i) |
| 463 | cur_name[i] = arg[i]; |
| 464 | cur_name[i] = '\0'; |
| 465 | arg += i; |
| 466 | |
| 467 | /* Check if the user provided a syscall name or a number. */ |
| 468 | syscall_number = (int) strtol (cur_name, &endptr, 0); |
| 469 | if (*endptr == '\0') |
| 470 | get_syscall_by_number (gdbarch, syscall_number, &s); |
| 471 | else |
| 472 | { |
| 473 | /* We have a name. Let's check if it's valid and convert it |
| 474 | to a number. */ |
| 475 | get_syscall_by_name (gdbarch, cur_name, &s); |
| 476 | |
| 477 | if (s.number == UNKNOWN_SYSCALL) |
| 478 | /* Here we have to issue an error instead of a warning, |
| 479 | because GDB cannot do anything useful if there's no |
| 480 | syscall number to be caught. */ |
| 481 | error (_("Unknown syscall name '%s'."), cur_name); |
| 482 | } |
| 483 | |
| 484 | /* Ok, it's valid. */ |
| 485 | VEC_safe_push (int, result, s.number); |
| 486 | } |
| 487 | |
| 488 | discard_cleanups (cleanup); |
| 489 | return result; |
| 490 | } |
| 491 | |
| 492 | /* Implement the "catch syscall" command. */ |
| 493 | |
| 494 | static void |
| 495 | catch_syscall_command_1 (char *arg, int from_tty, |
| 496 | struct cmd_list_element *command) |
| 497 | { |
| 498 | int tempflag; |
| 499 | VEC(int) *filter; |
| 500 | struct syscall s; |
| 501 | struct gdbarch *gdbarch = get_current_arch (); |
| 502 | |
| 503 | /* Checking if the feature if supported. */ |
| 504 | if (gdbarch_get_syscall_number_p (gdbarch) == 0) |
| 505 | error (_("The feature 'catch syscall' is not supported on \ |
| 506 | this architecture yet.")); |
| 507 | |
| 508 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; |
| 509 | |
| 510 | arg = skip_spaces (arg); |
| 511 | |
| 512 | /* We need to do this first "dummy" translation in order |
| 513 | to get the syscall XML file loaded or, most important, |
| 514 | to display a warning to the user if there's no XML file |
| 515 | for his/her architecture. */ |
| 516 | get_syscall_by_number (gdbarch, 0, &s); |
| 517 | |
| 518 | /* The allowed syntax is: |
| 519 | catch syscall |
| 520 | catch syscall <name | number> [<name | number> ... <name | number>] |
| 521 | |
| 522 | Let's check if there's a syscall name. */ |
| 523 | |
| 524 | if (arg != NULL) |
| 525 | filter = catch_syscall_split_args (arg); |
| 526 | else |
| 527 | filter = NULL; |
| 528 | |
| 529 | create_syscall_event_catchpoint (tempflag, filter, |
| 530 | &catch_syscall_breakpoint_ops); |
| 531 | } |
| 532 | |
| 533 | |
| 534 | /* Returns 0 if 'bp' is NOT a syscall catchpoint, |
| 535 | non-zero otherwise. */ |
| 536 | static int |
| 537 | is_syscall_catchpoint_enabled (struct breakpoint *bp) |
| 538 | { |
| 539 | if (syscall_catchpoint_p (bp) |
| 540 | && bp->enable_state != bp_disabled |
| 541 | && bp->enable_state != bp_call_disabled) |
| 542 | return 1; |
| 543 | else |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | int |
| 548 | catch_syscall_enabled (void) |
| 549 | { |
| 550 | struct catch_syscall_inferior_data *inf_data |
| 551 | = get_catch_syscall_inferior_data (current_inferior ()); |
| 552 | |
| 553 | return inf_data->total_syscalls_count != 0; |
| 554 | } |
| 555 | |
| 556 | /* Helper function for catching_syscall_number. If B is a syscall |
| 557 | catchpoint for SYSCALL_NUMBER, return 1 (which will make |
| 558 | 'breakpoint_find_if' return). Otherwise, return 0. */ |
| 559 | |
| 560 | static int |
| 561 | catching_syscall_number_1 (struct breakpoint *b, |
| 562 | void *data) |
| 563 | { |
| 564 | int syscall_number = (int) (uintptr_t) data; |
| 565 | |
| 566 | if (is_syscall_catchpoint_enabled (b)) |
| 567 | { |
| 568 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; |
| 569 | |
| 570 | if (c->syscalls_to_be_caught) |
| 571 | { |
| 572 | int i, iter; |
| 573 | for (i = 0; |
| 574 | VEC_iterate (int, c->syscalls_to_be_caught, i, iter); |
| 575 | i++) |
| 576 | if (syscall_number == iter) |
| 577 | return 1; |
| 578 | } |
| 579 | else |
| 580 | return 1; |
| 581 | } |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | int |
| 587 | catching_syscall_number (int syscall_number) |
| 588 | { |
| 589 | struct breakpoint *b = breakpoint_find_if (catching_syscall_number_1, |
| 590 | (void *) (uintptr_t) syscall_number); |
| 591 | |
| 592 | return b != NULL; |
| 593 | } |
| 594 | |
| 595 | /* Complete syscall names. Used by "catch syscall". */ |
| 596 | static VEC (char_ptr) * |
| 597 | catch_syscall_completer (struct cmd_list_element *cmd, |
| 598 | const char *text, const char *word) |
| 599 | { |
| 600 | const char **list = get_syscall_names (get_current_arch ()); |
| 601 | VEC (char_ptr) *retlist |
| 602 | = (list == NULL) ? NULL : complete_on_enum (list, word, word); |
| 603 | |
| 604 | xfree (list); |
| 605 | return retlist; |
| 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 | VEC_free (int, inf_data->syscalls_counts); |
| 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->dtor = dtor_catch_syscall; |
| 630 | ops->insert_location = insert_catch_syscall; |
| 631 | ops->remove_location = remove_catch_syscall; |
| 632 | ops->breakpoint_hit = breakpoint_hit_catch_syscall; |
| 633 | ops->print_it = print_it_catch_syscall; |
| 634 | ops->print_one = print_one_catch_syscall; |
| 635 | ops->print_mention = print_mention_catch_syscall; |
| 636 | ops->print_recreate = print_recreate_catch_syscall; |
| 637 | } |
| 638 | |
| 639 | initialize_file_ftype _initialize_break_catch_syscall; |
| 640 | |
| 641 | void |
| 642 | _initialize_break_catch_syscall (void) |
| 643 | { |
| 644 | initialize_syscall_catchpoint_ops (); |
| 645 | |
| 646 | observer_attach_inferior_exit (clear_syscall_counts); |
| 647 | catch_syscall_inferior_data |
| 648 | = register_inferior_data_with_cleanup (NULL, |
| 649 | catch_syscall_inferior_data_cleanup); |
| 650 | |
| 651 | add_catch_command ("syscall", _("\ |
| 652 | Catch system calls by their names and/or numbers.\n\ |
| 653 | Arguments say which system calls to catch. If no arguments\n\ |
| 654 | are given, every system call will be caught.\n\ |
| 655 | Arguments, if given, should be one or more system call names\n\ |
| 656 | (if your system supports that), or system call numbers."), |
| 657 | catch_syscall_command_1, |
| 658 | catch_syscall_completer, |
| 659 | CATCH_PERMANENT, |
| 660 | CATCH_TEMPORARY); |
| 661 | } |