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10304ef3 SDJ |
1 | /* Everything about syscall catchpoints, for GDB. |
2 | ||
e2882c85 | 3 | Copyright (C) 2009-2018 Free Software Foundation, Inc. |
10304ef3 SDJ |
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" | |
76727919 | 30 | #include "observable.h" |
10304ef3 SDJ |
31 | #include "xml-syscall.h" |
32 | ||
33 | /* An instance of this type is used to represent a syscall catchpoint. | |
c1fc2657 | 34 | A breakpoint is really of this type iff its ops pointer points to |
10304ef3 SDJ |
35 | CATCH_SYSCALL_BREAKPOINT_OPS. */ |
36 | ||
c1fc2657 | 37 | struct syscall_catchpoint : public breakpoint |
10304ef3 | 38 | { |
10304ef3 | 39 | /* Syscall numbers used for the 'catch syscall' feature. If no |
e12c9b7a TT |
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; | |
10304ef3 SDJ |
43 | }; |
44 | ||
10304ef3 SDJ |
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. */ | |
b6f48cb0 | 57 | std::vector<int> syscalls_counts; |
10304ef3 SDJ |
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 | ||
b6f48cb0 | 64 | static struct catch_syscall_inferior_data * |
10304ef3 SDJ |
65 | get_catch_syscall_inferior_data (struct inferior *inf) |
66 | { | |
67 | struct catch_syscall_inferior_data *inf_data; | |
68 | ||
9a3c8263 SM |
69 | inf_data = ((struct catch_syscall_inferior_data *) |
70 | inferior_data (inf, catch_syscall_inferior_data)); | |
10304ef3 SDJ |
71 | if (inf_data == NULL) |
72 | { | |
b6f48cb0 | 73 | inf_data = new struct catch_syscall_inferior_data (); |
10304ef3 SDJ |
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 | { | |
b6f48cb0 TT |
83 | struct catch_syscall_inferior_data *inf_data |
84 | = (struct catch_syscall_inferior_data *) arg; | |
85 | delete inf_data; | |
10304ef3 SDJ |
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; | |
e12c9b7a | 101 | if (c->syscalls_to_be_caught.empty ()) |
10304ef3 SDJ |
102 | ++inf_data->any_syscall_count; |
103 | else | |
104 | { | |
e12c9b7a | 105 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 | 106 | { |
b6f48cb0 TT |
107 | if (iter >= inf_data->syscalls_counts.size ()) |
108 | inf_data->syscalls_counts.resize (iter + 1); | |
109 | ++inf_data->syscalls_counts[iter]; | |
10304ef3 SDJ |
110 | } |
111 | } | |
112 | ||
e99b03dc | 113 | return target_set_syscall_catchpoint (inferior_ptid.pid (), |
10304ef3 SDJ |
114 | inf_data->total_syscalls_count != 0, |
115 | inf_data->any_syscall_count, | |
649a140c | 116 | inf_data->syscalls_counts); |
10304ef3 SDJ |
117 | } |
118 | ||
119 | /* Implement the "remove" breakpoint_ops method for syscall | |
120 | catchpoints. */ | |
121 | ||
122 | static int | |
73971819 | 123 | remove_catch_syscall (struct bp_location *bl, enum remove_bp_reason reason) |
10304ef3 SDJ |
124 | { |
125 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) bl->owner; | |
126 | struct inferior *inf = current_inferior (); | |
127 | struct catch_syscall_inferior_data *inf_data | |
128 | = get_catch_syscall_inferior_data (inf); | |
129 | ||
130 | --inf_data->total_syscalls_count; | |
e12c9b7a | 131 | if (c->syscalls_to_be_caught.empty ()) |
10304ef3 SDJ |
132 | --inf_data->any_syscall_count; |
133 | else | |
134 | { | |
e12c9b7a | 135 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 | 136 | { |
b6f48cb0 | 137 | if (iter >= inf_data->syscalls_counts.size ()) |
10304ef3 SDJ |
138 | /* Shouldn't happen. */ |
139 | continue; | |
b6f48cb0 | 140 | --inf_data->syscalls_counts[iter]; |
10304ef3 SDJ |
141 | } |
142 | } | |
143 | ||
e99b03dc | 144 | return target_set_syscall_catchpoint (inferior_ptid.pid (), |
10304ef3 SDJ |
145 | inf_data->total_syscalls_count != 0, |
146 | inf_data->any_syscall_count, | |
649a140c | 147 | inf_data->syscalls_counts); |
10304ef3 SDJ |
148 | } |
149 | ||
150 | /* Implement the "breakpoint_hit" breakpoint_ops method for syscall | |
151 | catchpoints. */ | |
152 | ||
153 | static int | |
154 | breakpoint_hit_catch_syscall (const struct bp_location *bl, | |
bd522513 | 155 | const address_space *aspace, CORE_ADDR bp_addr, |
10304ef3 SDJ |
156 | const struct target_waitstatus *ws) |
157 | { | |
158 | /* We must check if we are catching specific syscalls in this | |
159 | breakpoint. If we are, then we must guarantee that the called | |
160 | syscall is the same syscall we are catching. */ | |
161 | int syscall_number = 0; | |
162 | const struct syscall_catchpoint *c | |
163 | = (const struct syscall_catchpoint *) bl->owner; | |
164 | ||
165 | if (ws->kind != TARGET_WAITKIND_SYSCALL_ENTRY | |
166 | && ws->kind != TARGET_WAITKIND_SYSCALL_RETURN) | |
167 | return 0; | |
168 | ||
169 | syscall_number = ws->value.syscall_number; | |
170 | ||
171 | /* Now, checking if the syscall is the same. */ | |
e12c9b7a | 172 | if (!c->syscalls_to_be_caught.empty ()) |
10304ef3 | 173 | { |
e12c9b7a | 174 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 SDJ |
175 | if (syscall_number == iter) |
176 | return 1; | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | return 1; | |
182 | } | |
183 | ||
184 | /* Implement the "print_it" breakpoint_ops method for syscall | |
185 | catchpoints. */ | |
186 | ||
187 | static enum print_stop_action | |
188 | print_it_catch_syscall (bpstat bs) | |
189 | { | |
190 | struct ui_out *uiout = current_uiout; | |
191 | struct breakpoint *b = bs->breakpoint_at; | |
192 | /* These are needed because we want to know in which state a | |
193 | syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY | |
194 | or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we | |
195 | must print "called syscall" or "returned from syscall". */ | |
196 | ptid_t ptid; | |
197 | struct target_waitstatus last; | |
198 | struct syscall s; | |
199 | struct gdbarch *gdbarch = bs->bp_location_at->gdbarch; | |
200 | ||
201 | get_last_target_status (&ptid, &last); | |
202 | ||
203 | get_syscall_by_number (gdbarch, last.value.syscall_number, &s); | |
204 | ||
205 | annotate_catchpoint (b->number); | |
f303dbd6 | 206 | maybe_print_thread_hit_breakpoint (uiout); |
10304ef3 SDJ |
207 | |
208 | if (b->disposition == disp_del) | |
112e8700 | 209 | uiout->text ("Temporary catchpoint "); |
10304ef3 | 210 | else |
112e8700 SM |
211 | uiout->text ("Catchpoint "); |
212 | if (uiout->is_mi_like_p ()) | |
10304ef3 | 213 | { |
112e8700 | 214 | uiout->field_string ("reason", |
10304ef3 SDJ |
215 | async_reason_lookup (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY |
216 | ? EXEC_ASYNC_SYSCALL_ENTRY | |
217 | : EXEC_ASYNC_SYSCALL_RETURN)); | |
112e8700 | 218 | uiout->field_string ("disp", bpdisp_text (b->disposition)); |
10304ef3 | 219 | } |
112e8700 | 220 | uiout->field_int ("bkptno", b->number); |
10304ef3 SDJ |
221 | |
222 | if (last.kind == TARGET_WAITKIND_SYSCALL_ENTRY) | |
112e8700 | 223 | uiout->text (" (call to syscall "); |
10304ef3 | 224 | else |
112e8700 | 225 | uiout->text (" (returned from syscall "); |
10304ef3 | 226 | |
112e8700 SM |
227 | if (s.name == NULL || uiout->is_mi_like_p ()) |
228 | uiout->field_int ("syscall-number", last.value.syscall_number); | |
10304ef3 | 229 | if (s.name != NULL) |
112e8700 | 230 | uiout->field_string ("syscall-name", s.name); |
10304ef3 | 231 | |
112e8700 | 232 | uiout->text ("), "); |
10304ef3 SDJ |
233 | |
234 | return PRINT_SRC_AND_LOC; | |
235 | } | |
236 | ||
237 | /* Implement the "print_one" breakpoint_ops method for syscall | |
238 | catchpoints. */ | |
239 | ||
240 | static void | |
241 | print_one_catch_syscall (struct breakpoint *b, | |
242 | struct bp_location **last_loc) | |
243 | { | |
244 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; | |
245 | struct value_print_options opts; | |
246 | struct ui_out *uiout = current_uiout; | |
247 | struct gdbarch *gdbarch = b->loc->gdbarch; | |
248 | ||
249 | get_user_print_options (&opts); | |
250 | /* Field 4, the address, is omitted (which makes the columns not | |
251 | line up too nicely with the headers, but the effect is relatively | |
252 | readable). */ | |
253 | if (opts.addressprint) | |
112e8700 | 254 | uiout->field_skip ("addr"); |
10304ef3 SDJ |
255 | annotate_field (5); |
256 | ||
e12c9b7a | 257 | if (c->syscalls_to_be_caught.size () > 1) |
112e8700 | 258 | uiout->text ("syscalls \""); |
10304ef3 | 259 | else |
112e8700 | 260 | uiout->text ("syscall \""); |
10304ef3 | 261 | |
e12c9b7a | 262 | if (!c->syscalls_to_be_caught.empty ()) |
10304ef3 | 263 | { |
10304ef3 SDJ |
264 | char *text = xstrprintf ("%s", ""); |
265 | ||
e12c9b7a | 266 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 SDJ |
267 | { |
268 | char *x = text; | |
269 | struct syscall s; | |
270 | get_syscall_by_number (gdbarch, iter, &s); | |
271 | ||
272 | if (s.name != NULL) | |
273 | text = xstrprintf ("%s%s, ", text, s.name); | |
274 | else | |
275 | text = xstrprintf ("%s%d, ", text, iter); | |
276 | ||
277 | /* We have to xfree the last 'text' (now stored at 'x') | |
278 | because xstrprintf dynamically allocates new space for it | |
279 | on every call. */ | |
280 | xfree (x); | |
281 | } | |
282 | /* Remove the last comma. */ | |
283 | text[strlen (text) - 2] = '\0'; | |
112e8700 | 284 | uiout->field_string ("what", text); |
10304ef3 SDJ |
285 | } |
286 | else | |
112e8700 SM |
287 | uiout->field_string ("what", "<any syscall>"); |
288 | uiout->text ("\" "); | |
10304ef3 | 289 | |
112e8700 SM |
290 | if (uiout->is_mi_like_p ()) |
291 | uiout->field_string ("catch-type", "syscall"); | |
10304ef3 SDJ |
292 | } |
293 | ||
294 | /* Implement the "print_mention" breakpoint_ops method for syscall | |
295 | catchpoints. */ | |
296 | ||
297 | static void | |
298 | print_mention_catch_syscall (struct breakpoint *b) | |
299 | { | |
300 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; | |
301 | struct gdbarch *gdbarch = b->loc->gdbarch; | |
302 | ||
e12c9b7a | 303 | if (!c->syscalls_to_be_caught.empty ()) |
10304ef3 | 304 | { |
e12c9b7a | 305 | if (c->syscalls_to_be_caught.size () > 1) |
10304ef3 SDJ |
306 | printf_filtered (_("Catchpoint %d (syscalls"), b->number); |
307 | else | |
308 | printf_filtered (_("Catchpoint %d (syscall"), b->number); | |
309 | ||
e12c9b7a | 310 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 SDJ |
311 | { |
312 | struct syscall s; | |
313 | get_syscall_by_number (gdbarch, iter, &s); | |
314 | ||
e12c9b7a | 315 | if (s.name != NULL) |
10304ef3 SDJ |
316 | printf_filtered (" '%s' [%d]", s.name, s.number); |
317 | else | |
318 | printf_filtered (" %d", s.number); | |
319 | } | |
320 | printf_filtered (")"); | |
321 | } | |
322 | else | |
323 | printf_filtered (_("Catchpoint %d (any syscall)"), | |
324 | b->number); | |
325 | } | |
326 | ||
327 | /* Implement the "print_recreate" breakpoint_ops method for syscall | |
328 | catchpoints. */ | |
329 | ||
330 | static void | |
331 | print_recreate_catch_syscall (struct breakpoint *b, struct ui_file *fp) | |
332 | { | |
333 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; | |
334 | struct gdbarch *gdbarch = b->loc->gdbarch; | |
335 | ||
336 | fprintf_unfiltered (fp, "catch syscall"); | |
337 | ||
e12c9b7a | 338 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 | 339 | { |
e12c9b7a | 340 | struct syscall s; |
10304ef3 | 341 | |
e12c9b7a TT |
342 | get_syscall_by_number (gdbarch, iter, &s); |
343 | if (s.name != NULL) | |
344 | fprintf_unfiltered (fp, " %s", s.name); | |
345 | else | |
346 | fprintf_unfiltered (fp, " %d", s.number); | |
10304ef3 | 347 | } |
e12c9b7a | 348 | |
10304ef3 SDJ |
349 | print_recreate_thread (b, fp); |
350 | } | |
351 | ||
352 | /* The breakpoint_ops structure to be used in syscall catchpoints. */ | |
353 | ||
354 | static struct breakpoint_ops catch_syscall_breakpoint_ops; | |
355 | ||
356 | /* Returns non-zero if 'b' is a syscall catchpoint. */ | |
357 | ||
358 | static int | |
359 | syscall_catchpoint_p (struct breakpoint *b) | |
360 | { | |
361 | return (b->ops == &catch_syscall_breakpoint_ops); | |
362 | } | |
363 | ||
364 | static void | |
e12c9b7a | 365 | create_syscall_event_catchpoint (int tempflag, std::vector<int> &&filter, |
10304ef3 SDJ |
366 | const struct breakpoint_ops *ops) |
367 | { | |
10304ef3 SDJ |
368 | struct gdbarch *gdbarch = get_current_arch (); |
369 | ||
b270e6f9 TT |
370 | std::unique_ptr<syscall_catchpoint> c (new syscall_catchpoint ()); |
371 | init_catchpoint (c.get (), gdbarch, tempflag, NULL, ops); | |
2f5404b3 | 372 | c->syscalls_to_be_caught = std::move (filter); |
10304ef3 | 373 | |
b270e6f9 | 374 | install_breakpoint (0, std::move (c), 1); |
10304ef3 SDJ |
375 | } |
376 | ||
e12c9b7a TT |
377 | /* Splits the argument using space as delimiter. */ |
378 | ||
379 | static std::vector<int> | |
eb4c3f4a | 380 | catch_syscall_split_args (const char *arg) |
10304ef3 | 381 | { |
e12c9b7a | 382 | std::vector<int> result; |
10304ef3 SDJ |
383 | struct gdbarch *gdbarch = target_gdbarch (); |
384 | ||
385 | while (*arg != '\0') | |
386 | { | |
387 | int i, syscall_number; | |
388 | char *endptr; | |
389 | char cur_name[128]; | |
390 | struct syscall s; | |
391 | ||
392 | /* Skip whitespace. */ | |
393 | arg = skip_spaces (arg); | |
394 | ||
395 | for (i = 0; i < 127 && arg[i] && !isspace (arg[i]); ++i) | |
396 | cur_name[i] = arg[i]; | |
397 | cur_name[i] = '\0'; | |
398 | arg += i; | |
399 | ||
e3487908 | 400 | /* Check if the user provided a syscall name, group, or a number. */ |
10304ef3 SDJ |
401 | syscall_number = (int) strtol (cur_name, &endptr, 0); |
402 | if (*endptr == '\0') | |
e3487908 GKB |
403 | { |
404 | get_syscall_by_number (gdbarch, syscall_number, &s); | |
e12c9b7a | 405 | result.push_back (s.number); |
e3487908 GKB |
406 | } |
407 | else if (startswith (cur_name, "g:") | |
408 | || startswith (cur_name, "group:")) | |
409 | { | |
410 | /* We have a syscall group. Let's expand it into a syscall | |
411 | list before inserting. */ | |
412 | struct syscall *syscall_list; | |
413 | const char *group_name; | |
414 | ||
415 | /* Skip over "g:" and "group:" prefix strings. */ | |
416 | group_name = strchr (cur_name, ':') + 1; | |
417 | ||
418 | syscall_list = get_syscalls_by_group (gdbarch, group_name); | |
419 | ||
420 | if (syscall_list == NULL) | |
421 | error (_("Unknown syscall group '%s'."), group_name); | |
422 | ||
423 | for (i = 0; syscall_list[i].name != NULL; i++) | |
424 | { | |
425 | /* Insert each syscall that are part of the group. No | |
426 | need to check if it is valid. */ | |
e12c9b7a | 427 | result.push_back (syscall_list[i].number); |
e3487908 GKB |
428 | } |
429 | ||
430 | xfree (syscall_list); | |
431 | } | |
10304ef3 SDJ |
432 | else |
433 | { | |
434 | /* We have a name. Let's check if it's valid and convert it | |
435 | to a number. */ | |
436 | get_syscall_by_name (gdbarch, cur_name, &s); | |
437 | ||
438 | if (s.number == UNKNOWN_SYSCALL) | |
439 | /* Here we have to issue an error instead of a warning, | |
440 | because GDB cannot do anything useful if there's no | |
441 | syscall number to be caught. */ | |
442 | error (_("Unknown syscall name '%s'."), cur_name); | |
10304ef3 | 443 | |
e3487908 | 444 | /* Ok, it's valid. */ |
e12c9b7a | 445 | result.push_back (s.number); |
e3487908 | 446 | } |
10304ef3 SDJ |
447 | } |
448 | ||
10304ef3 SDJ |
449 | return result; |
450 | } | |
451 | ||
452 | /* Implement the "catch syscall" command. */ | |
453 | ||
454 | static void | |
eb4c3f4a | 455 | catch_syscall_command_1 (const char *arg, int from_tty, |
10304ef3 SDJ |
456 | struct cmd_list_element *command) |
457 | { | |
458 | int tempflag; | |
e12c9b7a | 459 | std::vector<int> filter; |
10304ef3 SDJ |
460 | struct syscall s; |
461 | struct gdbarch *gdbarch = get_current_arch (); | |
462 | ||
463 | /* Checking if the feature if supported. */ | |
464 | if (gdbarch_get_syscall_number_p (gdbarch) == 0) | |
465 | error (_("The feature 'catch syscall' is not supported on \ | |
466 | this architecture yet.")); | |
467 | ||
468 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
469 | ||
470 | arg = skip_spaces (arg); | |
471 | ||
472 | /* We need to do this first "dummy" translation in order | |
473 | to get the syscall XML file loaded or, most important, | |
474 | to display a warning to the user if there's no XML file | |
475 | for his/her architecture. */ | |
476 | get_syscall_by_number (gdbarch, 0, &s); | |
477 | ||
478 | /* The allowed syntax is: | |
479 | catch syscall | |
480 | catch syscall <name | number> [<name | number> ... <name | number>] | |
481 | ||
482 | Let's check if there's a syscall name. */ | |
483 | ||
484 | if (arg != NULL) | |
485 | filter = catch_syscall_split_args (arg); | |
10304ef3 | 486 | |
e12c9b7a | 487 | create_syscall_event_catchpoint (tempflag, std::move (filter), |
10304ef3 SDJ |
488 | &catch_syscall_breakpoint_ops); |
489 | } | |
490 | ||
491 | ||
492 | /* Returns 0 if 'bp' is NOT a syscall catchpoint, | |
493 | non-zero otherwise. */ | |
494 | static int | |
495 | is_syscall_catchpoint_enabled (struct breakpoint *bp) | |
496 | { | |
497 | if (syscall_catchpoint_p (bp) | |
498 | && bp->enable_state != bp_disabled | |
499 | && bp->enable_state != bp_call_disabled) | |
500 | return 1; | |
501 | else | |
502 | return 0; | |
503 | } | |
504 | ||
505 | int | |
506 | catch_syscall_enabled (void) | |
507 | { | |
508 | struct catch_syscall_inferior_data *inf_data | |
509 | = get_catch_syscall_inferior_data (current_inferior ()); | |
510 | ||
511 | return inf_data->total_syscalls_count != 0; | |
512 | } | |
513 | ||
514 | /* Helper function for catching_syscall_number. If B is a syscall | |
515 | catchpoint for SYSCALL_NUMBER, return 1 (which will make | |
516 | 'breakpoint_find_if' return). Otherwise, return 0. */ | |
517 | ||
518 | static int | |
519 | catching_syscall_number_1 (struct breakpoint *b, | |
520 | void *data) | |
521 | { | |
522 | int syscall_number = (int) (uintptr_t) data; | |
523 | ||
524 | if (is_syscall_catchpoint_enabled (b)) | |
525 | { | |
526 | struct syscall_catchpoint *c = (struct syscall_catchpoint *) b; | |
527 | ||
e12c9b7a | 528 | if (!c->syscalls_to_be_caught.empty ()) |
10304ef3 | 529 | { |
e12c9b7a | 530 | for (int iter : c->syscalls_to_be_caught) |
10304ef3 SDJ |
531 | if (syscall_number == iter) |
532 | return 1; | |
533 | } | |
534 | else | |
535 | return 1; | |
536 | } | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | int | |
542 | catching_syscall_number (int syscall_number) | |
543 | { | |
544 | struct breakpoint *b = breakpoint_find_if (catching_syscall_number_1, | |
545 | (void *) (uintptr_t) syscall_number); | |
546 | ||
547 | return b != NULL; | |
548 | } | |
549 | ||
550 | /* Complete syscall names. Used by "catch syscall". */ | |
eb3ff9a5 PA |
551 | |
552 | static void | |
10304ef3 | 553 | catch_syscall_completer (struct cmd_list_element *cmd, |
eb3ff9a5 | 554 | completion_tracker &tracker, |
10304ef3 SDJ |
555 | const char *text, const char *word) |
556 | { | |
e3487908 | 557 | struct gdbarch *gdbarch = get_current_arch (); |
3d415c26 | 558 | gdb::unique_xmalloc_ptr<const char *> group_list; |
e3487908 | 559 | const char *prefix; |
e3487908 GKB |
560 | |
561 | /* Completion considers ':' to be a word separator, so we use this to | |
562 | verify whether the previous word was a group prefix. If so, we | |
563 | build the completion list using group names only. */ | |
564 | for (prefix = word; prefix != text && prefix[-1] != ' '; prefix--) | |
565 | ; | |
566 | ||
567 | if (startswith (prefix, "g:") || startswith (prefix, "group:")) | |
568 | { | |
569 | /* Perform completion inside 'group:' namespace only. */ | |
3d415c26 | 570 | group_list.reset (get_syscall_group_names (gdbarch)); |
eb3ff9a5 | 571 | if (group_list != NULL) |
3d415c26 | 572 | complete_on_enum (tracker, group_list.get (), word, word); |
e3487908 GKB |
573 | } |
574 | else | |
575 | { | |
576 | /* Complete with both, syscall names and groups. */ | |
3d415c26 TT |
577 | gdb::unique_xmalloc_ptr<const char *> syscall_list |
578 | (get_syscall_names (gdbarch)); | |
579 | group_list.reset (get_syscall_group_names (gdbarch)); | |
580 | ||
581 | const char **group_ptr = group_list.get (); | |
582 | ||
583 | /* Hold on to strings while we're using them. */ | |
584 | std::vector<std::string> holders; | |
e3487908 GKB |
585 | |
586 | /* Append "group:" prefix to syscall groups. */ | |
9a93831c SM |
587 | for (int i = 0; group_ptr[i] != NULL; i++) |
588 | holders.push_back (string_printf ("group:%s", group_ptr[i])); | |
e3487908 | 589 | |
9a93831c SM |
590 | for (int i = 0; group_ptr[i] != NULL; i++) |
591 | group_ptr[i] = holders[i].c_str (); | |
e3487908 | 592 | |
eb3ff9a5 | 593 | if (syscall_list != NULL) |
3d415c26 | 594 | complete_on_enum (tracker, syscall_list.get (), word, word); |
eb3ff9a5 | 595 | if (group_list != NULL) |
3d415c26 | 596 | complete_on_enum (tracker, group_ptr, word, word); |
e3487908 | 597 | } |
10304ef3 SDJ |
598 | } |
599 | ||
600 | static void | |
601 | clear_syscall_counts (struct inferior *inf) | |
602 | { | |
603 | struct catch_syscall_inferior_data *inf_data | |
604 | = get_catch_syscall_inferior_data (inf); | |
605 | ||
606 | inf_data->total_syscalls_count = 0; | |
607 | inf_data->any_syscall_count = 0; | |
b6f48cb0 | 608 | inf_data->syscalls_counts.clear (); |
10304ef3 SDJ |
609 | } |
610 | ||
611 | static void | |
612 | initialize_syscall_catchpoint_ops (void) | |
613 | { | |
614 | struct breakpoint_ops *ops; | |
615 | ||
616 | initialize_breakpoint_ops (); | |
617 | ||
618 | /* Syscall catchpoints. */ | |
619 | ops = &catch_syscall_breakpoint_ops; | |
620 | *ops = base_breakpoint_ops; | |
10304ef3 SDJ |
621 | ops->insert_location = insert_catch_syscall; |
622 | ops->remove_location = remove_catch_syscall; | |
623 | ops->breakpoint_hit = breakpoint_hit_catch_syscall; | |
624 | ops->print_it = print_it_catch_syscall; | |
625 | ops->print_one = print_one_catch_syscall; | |
626 | ops->print_mention = print_mention_catch_syscall; | |
627 | ops->print_recreate = print_recreate_catch_syscall; | |
628 | } | |
629 | ||
10304ef3 SDJ |
630 | void |
631 | _initialize_break_catch_syscall (void) | |
632 | { | |
633 | initialize_syscall_catchpoint_ops (); | |
634 | ||
76727919 | 635 | gdb::observers::inferior_exit.attach (clear_syscall_counts); |
10304ef3 SDJ |
636 | catch_syscall_inferior_data |
637 | = register_inferior_data_with_cleanup (NULL, | |
638 | catch_syscall_inferior_data_cleanup); | |
639 | ||
640 | add_catch_command ("syscall", _("\ | |
e3487908 GKB |
641 | Catch system calls by their names, groups and/or numbers.\n\ |
642 | Arguments say which system calls to catch. If no arguments are given,\n\ | |
643 | every system call will be caught. Arguments, if given, should be one\n\ | |
644 | or more system call names (if your system supports that), system call\n\ | |
645 | groups or system call numbers."), | |
10304ef3 SDJ |
646 | catch_syscall_command_1, |
647 | catch_syscall_completer, | |
648 | CATCH_PERMANENT, | |
649 | CATCH_TEMPORARY); | |
650 | } |