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c906108c SS |
1 | /* Target-vector operations for controlling Unix child processes, for GDB. |
2 | Copyright 1990-1996, 1998, 1999 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. | |
4 | ||
c5aa993b | 5 | ## Contains temporary hacks.. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
c5aa993b | 25 | #include "frame.h" /* required by inferior.h */ |
c906108c SS |
26 | #include "inferior.h" |
27 | #include "target.h" | |
28 | #include "gdbcore.h" | |
29 | #include "command.h" | |
30 | #include "gdb_stat.h" | |
31 | #include <signal.h> | |
32 | #include <sys/types.h> | |
33 | #include <fcntl.h> | |
34 | ||
03f2053f | 35 | #include "gdb_wait.h" |
c906108c SS |
36 | |
37 | extern struct symtab_and_line * | |
c5aa993b | 38 | child_enable_exception_callback PARAMS ((enum exception_event_kind, int)); |
c906108c SS |
39 | |
40 | extern struct exception_event_record * | |
c5aa993b | 41 | child_get_current_exception_event PARAMS ((void)); |
c906108c SS |
42 | |
43 | extern void _initialize_inftarg PARAMS ((void)); | |
44 | ||
45 | static void | |
46 | child_prepare_to_store PARAMS ((void)); | |
47 | ||
48 | #ifndef CHILD_WAIT | |
49 | static int child_wait PARAMS ((int, struct target_waitstatus *)); | |
50 | #endif /* CHILD_WAIT */ | |
51 | ||
52 | #if !defined(CHILD_POST_WAIT) | |
53 | void | |
54 | child_post_wait PARAMS ((int, int)); | |
55 | #endif | |
56 | ||
57 | static void child_open PARAMS ((char *, int)); | |
58 | ||
59 | static void | |
60 | child_files_info PARAMS ((struct target_ops *)); | |
61 | ||
62 | static void | |
63 | child_detach PARAMS ((char *, int)); | |
64 | ||
65 | static void | |
66 | child_detach_from_process PARAMS ((int, char *, int, int)); | |
67 | ||
68 | static void | |
69 | child_attach PARAMS ((char *, int)); | |
70 | ||
71 | static void | |
72 | child_attach_to_process PARAMS ((char *, int, int)); | |
73 | ||
74 | #if !defined(CHILD_POST_ATTACH) | |
75 | extern void child_post_attach PARAMS ((int)); | |
76 | #endif | |
77 | ||
78 | static void | |
79 | child_require_attach PARAMS ((char *, int)); | |
80 | ||
81 | static void | |
82 | child_require_detach PARAMS ((int, char *, int)); | |
83 | ||
84 | static void | |
85 | ptrace_me PARAMS ((void)); | |
86 | ||
c5aa993b | 87 | static void |
c906108c SS |
88 | ptrace_him PARAMS ((int)); |
89 | ||
c5aa993b | 90 | static void |
c906108c SS |
91 | child_create_inferior PARAMS ((char *, char *, char **)); |
92 | ||
93 | static void | |
94 | child_mourn_inferior PARAMS ((void)); | |
95 | ||
96 | static int | |
97 | child_can_run PARAMS ((void)); | |
98 | ||
99 | static void | |
100 | child_stop PARAMS ((void)); | |
101 | ||
102 | #ifndef CHILD_THREAD_ALIVE | |
103 | int child_thread_alive PARAMS ((int)); | |
104 | #endif | |
105 | ||
106 | static void init_child_ops PARAMS ((void)); | |
107 | ||
108 | extern char **environ; | |
109 | ||
110 | struct target_ops child_ops; | |
111 | ||
112 | int child_suppress_run = 0; /* Non-zero if inftarg should pretend not to | |
113 | be a runnable target. Used by targets | |
114 | that can sit atop inftarg, such as HPUX | |
115 | thread support. */ | |
116 | ||
117 | #ifndef CHILD_WAIT | |
118 | ||
c5aa993b | 119 | /*## */ |
c906108c SS |
120 | /* Enable HACK for ttrace work. In |
121 | * infttrace.c/require_notification_of_events, | |
122 | * this is set to 0 so that the loop in child_wait | |
123 | * won't loop. | |
124 | */ | |
125 | int not_same_real_pid = 1; | |
c5aa993b | 126 | /*## */ |
c906108c SS |
127 | |
128 | ||
129 | /* Wait for child to do something. Return pid of child, or -1 in case | |
130 | of error; store status through argument pointer OURSTATUS. */ | |
131 | ||
132 | static int | |
133 | child_wait (pid, ourstatus) | |
134 | int pid; | |
135 | struct target_waitstatus *ourstatus; | |
136 | { | |
137 | int save_errno; | |
138 | int status; | |
7a292a7a | 139 | char *execd_pathname = NULL; |
c5aa993b JM |
140 | int exit_status; |
141 | int related_pid; | |
142 | int syscall_id; | |
143 | enum target_waitkind kind; | |
c906108c | 144 | |
c5aa993b JM |
145 | do |
146 | { | |
147 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
148 | attached process. */ | |
149 | set_sigio_trap (); | |
c906108c | 150 | |
c5aa993b | 151 | pid = ptrace_wait (inferior_pid, &status); |
c906108c | 152 | |
c5aa993b | 153 | save_errno = errno; |
c906108c | 154 | |
c5aa993b | 155 | clear_sigio_trap (); |
c906108c | 156 | |
c5aa993b | 157 | clear_sigint_trap (); |
c906108c | 158 | |
c5aa993b JM |
159 | if (pid == -1) |
160 | { | |
161 | if (save_errno == EINTR) | |
162 | continue; | |
c906108c | 163 | |
c5aa993b JM |
164 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", |
165 | safe_strerror (save_errno)); | |
c906108c | 166 | |
c5aa993b JM |
167 | /* Claim it exited with unknown signal. */ |
168 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
169 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
170 | return -1; | |
171 | } | |
c906108c | 172 | |
c5aa993b | 173 | /* Did it exit? |
c906108c | 174 | */ |
c5aa993b JM |
175 | if (target_has_exited (pid, status, &exit_status)) |
176 | { | |
177 | /* ??rehrauer: For now, ignore this. */ | |
178 | continue; | |
179 | } | |
180 | ||
181 | if (!target_thread_alive (pid)) | |
182 | { | |
183 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
184 | return pid; | |
185 | } | |
186 | ||
187 | if (target_has_forked (pid, &related_pid) | |
188 | && ((pid == inferior_pid) || (related_pid == inferior_pid))) | |
189 | { | |
190 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
191 | ourstatus->value.related_pid = related_pid; | |
192 | return pid; | |
193 | } | |
194 | ||
195 | if (target_has_vforked (pid, &related_pid) | |
196 | && ((pid == inferior_pid) || (related_pid == inferior_pid))) | |
197 | { | |
198 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
199 | ourstatus->value.related_pid = related_pid; | |
200 | return pid; | |
201 | } | |
202 | ||
203 | if (target_has_execd (pid, &execd_pathname)) | |
204 | { | |
205 | /* Are we ignoring initial exec events? (This is likely because | |
206 | we're in the process of starting up the inferior, and another | |
207 | (older) mechanism handles those.) If so, we'll report this | |
208 | as a regular stop, not an exec. | |
209 | */ | |
210 | if (inferior_ignoring_startup_exec_events) | |
211 | { | |
212 | inferior_ignoring_startup_exec_events--; | |
213 | } | |
214 | else | |
215 | { | |
216 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
217 | ourstatus->value.execd_pathname = execd_pathname; | |
218 | return pid; | |
219 | } | |
220 | } | |
221 | ||
222 | /* All we must do with these is communicate their occurrence | |
223 | to wait_for_inferior... | |
224 | */ | |
225 | if (target_has_syscall_event (pid, &kind, &syscall_id)) | |
226 | { | |
227 | ourstatus->kind = kind; | |
228 | ourstatus->value.syscall_id = syscall_id; | |
229 | return pid; | |
230 | } | |
231 | ||
232 | /*## } while (pid != inferior_pid); ## *//* Some other child died or stopped */ | |
c906108c | 233 | /* hack for thread testing */ |
c5aa993b JM |
234 | } |
235 | while ((pid != inferior_pid) && not_same_real_pid); | |
236 | /*## */ | |
c906108c SS |
237 | |
238 | store_waitstatus (ourstatus, status); | |
239 | return pid; | |
240 | } | |
241 | #endif /* CHILD_WAIT */ | |
242 | ||
243 | #if !defined(CHILD_POST_WAIT) | |
244 | void | |
245 | child_post_wait (pid, wait_status) | |
c5aa993b JM |
246 | int pid; |
247 | int wait_status; | |
c906108c SS |
248 | { |
249 | /* This version of Unix doesn't require a meaningful "post wait" | |
250 | operation. | |
c5aa993b | 251 | */ |
c906108c SS |
252 | } |
253 | #endif | |
c5aa993b | 254 | |
c906108c SS |
255 | |
256 | #ifndef CHILD_THREAD_ALIVE | |
257 | ||
258 | /* Check to see if the given thread is alive. | |
259 | ||
260 | FIXME: Is kill() ever the right way to do this? I doubt it, but | |
261 | for now we're going to try and be compatable with the old thread | |
262 | code. */ | |
263 | int | |
264 | child_thread_alive (pid) | |
265 | int pid; | |
266 | { | |
267 | return (kill (pid, 0) != -1); | |
268 | } | |
269 | ||
270 | #endif | |
271 | ||
272 | static void | |
273 | child_attach_to_process (args, from_tty, after_fork) | |
c5aa993b JM |
274 | char *args; |
275 | int from_tty; | |
276 | int after_fork; | |
c906108c SS |
277 | { |
278 | if (!args) | |
279 | error_no_arg ("process-id to attach"); | |
280 | ||
281 | #ifndef ATTACH_DETACH | |
282 | error ("Can't attach to a process on this machine."); | |
283 | #else | |
284 | { | |
285 | char *exec_file; | |
286 | int pid; | |
287 | char *dummy; | |
288 | ||
289 | dummy = args; | |
290 | pid = strtol (args, &dummy, 0); | |
291 | /* Some targets don't set errno on errors, grrr! */ | |
292 | if ((pid == 0) && (args == dummy)) | |
293 | error ("Illegal process-id: %s\n", args); | |
294 | ||
c5aa993b | 295 | if (pid == getpid ()) /* Trying to masturbate? */ |
c906108c SS |
296 | error ("I refuse to debug myself!"); |
297 | ||
298 | if (from_tty) | |
299 | { | |
300 | exec_file = (char *) get_exec_file (0); | |
301 | ||
302 | if (after_fork) | |
c5aa993b JM |
303 | printf_unfiltered ("Attaching after fork to %s\n", |
304 | target_pid_to_str (pid)); | |
c906108c SS |
305 | else if (exec_file) |
306 | printf_unfiltered ("Attaching to program: %s, %s\n", exec_file, | |
c5aa993b JM |
307 | target_pid_to_str (pid)); |
308 | else | |
309 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); | |
c906108c SS |
310 | |
311 | gdb_flush (gdb_stdout); | |
312 | } | |
313 | ||
314 | if (!after_fork) | |
315 | attach (pid); | |
316 | else | |
317 | REQUIRE_ATTACH (pid); | |
318 | ||
319 | inferior_pid = pid; | |
320 | push_target (&child_ops); | |
321 | } | |
c5aa993b | 322 | #endif /* ATTACH_DETACH */ |
c906108c SS |
323 | } |
324 | ||
325 | ||
326 | /* Attach to process PID, then initialize for debugging it. */ | |
327 | ||
328 | static void | |
329 | child_attach (args, from_tty) | |
330 | char *args; | |
331 | int from_tty; | |
332 | { | |
333 | child_attach_to_process (args, from_tty, 0); | |
334 | } | |
335 | ||
336 | #if !defined(CHILD_POST_ATTACH) | |
337 | void | |
338 | child_post_attach (pid) | |
c5aa993b | 339 | int pid; |
c906108c SS |
340 | { |
341 | /* This version of Unix doesn't require a meaningful "post attach" | |
342 | operation by a debugger. */ | |
343 | } | |
344 | #endif | |
345 | ||
346 | static void | |
347 | child_require_attach (args, from_tty) | |
348 | char *args; | |
349 | int from_tty; | |
350 | { | |
351 | child_attach_to_process (args, from_tty, 1); | |
c5aa993b | 352 | } |
c906108c SS |
353 | |
354 | static void | |
355 | child_detach_from_process (pid, args, from_tty, after_fork) | |
c5aa993b JM |
356 | int pid; |
357 | char *args; | |
358 | int from_tty; | |
359 | int after_fork; | |
c906108c SS |
360 | { |
361 | #ifdef ATTACH_DETACH | |
362 | { | |
363 | int siggnal = 0; | |
364 | ||
365 | if (from_tty) | |
366 | { | |
367 | char *exec_file = get_exec_file (0); | |
368 | if (exec_file == 0) | |
369 | exec_file = ""; | |
c5aa993b JM |
370 | if (after_fork) |
371 | printf_unfiltered ("Detaching after fork from %s\n", | |
372 | target_pid_to_str (pid)); | |
373 | else | |
c906108c | 374 | printf_unfiltered ("Detaching from program: %s, %s\n", exec_file, |
c5aa993b | 375 | target_pid_to_str (pid)); |
c906108c SS |
376 | gdb_flush (gdb_stdout); |
377 | } | |
378 | if (args) | |
379 | siggnal = atoi (args); | |
380 | ||
381 | if (!after_fork) | |
382 | detach (siggnal); | |
383 | else | |
384 | REQUIRE_DETACH (pid, siggnal); | |
385 | } | |
386 | #else | |
387 | error ("This version of Unix does not support detaching a process."); | |
388 | #endif | |
389 | } | |
390 | ||
391 | /* Take a program previously attached to and detaches it. | |
392 | The program resumes execution and will no longer stop | |
393 | on signals, etc. We'd better not have left any breakpoints | |
394 | in the program or it'll die when it hits one. For this | |
395 | to work, it may be necessary for the process to have been | |
396 | previously attached. It *might* work if the program was | |
397 | started via the normal ptrace (PTRACE_TRACEME). */ | |
398 | ||
399 | static void | |
400 | child_detach (args, from_tty) | |
401 | char *args; | |
402 | int from_tty; | |
403 | { | |
404 | child_detach_from_process (inferior_pid, args, from_tty, 0); | |
405 | inferior_pid = 0; | |
406 | unpush_target (&child_ops); | |
407 | } | |
408 | ||
409 | static void | |
410 | child_require_detach (pid, args, from_tty) | |
c5aa993b JM |
411 | int pid; |
412 | char *args; | |
413 | int from_tty; | |
c906108c SS |
414 | { |
415 | child_detach_from_process (pid, args, from_tty, 1); | |
416 | } | |
417 | ||
418 | ||
419 | /* Get ready to modify the registers array. On machines which store | |
420 | individual registers, this doesn't need to do anything. On machines | |
421 | which store all the registers in one fell swoop, this makes sure | |
422 | that registers contains all the registers from the program being | |
423 | debugged. */ | |
424 | ||
425 | static void | |
426 | child_prepare_to_store () | |
427 | { | |
428 | #ifdef CHILD_PREPARE_TO_STORE | |
429 | CHILD_PREPARE_TO_STORE (); | |
430 | #endif | |
431 | } | |
432 | ||
433 | /* Print status information about what we're accessing. */ | |
434 | ||
435 | static void | |
436 | child_files_info (ignore) | |
437 | struct target_ops *ignore; | |
438 | { | |
439 | printf_unfiltered ("\tUsing the running image of %s %s.\n", | |
c5aa993b | 440 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid)); |
c906108c SS |
441 | } |
442 | ||
443 | /* ARGSUSED */ | |
444 | static void | |
445 | child_open (arg, from_tty) | |
446 | char *arg; | |
447 | int from_tty; | |
448 | { | |
449 | error ("Use the \"run\" command to start a Unix child process."); | |
450 | } | |
451 | ||
452 | /* Stub function which causes the inferior that runs it, to be ptrace-able | |
453 | by its parent process. */ | |
454 | ||
455 | static void | |
456 | ptrace_me () | |
457 | { | |
458 | /* "Trace me, Dr. Memory!" */ | |
459 | call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0); | |
460 | } | |
461 | ||
462 | /* Stub function which causes the GDB that runs it, to start ptrace-ing | |
463 | the child process. */ | |
464 | ||
c5aa993b | 465 | static void |
c906108c SS |
466 | ptrace_him (pid) |
467 | int pid; | |
468 | { | |
469 | push_target (&child_ops); | |
470 | ||
471 | /* On some targets, there must be some explicit synchronization | |
472 | between the parent and child processes after the debugger | |
473 | forks, and before the child execs the debuggee program. This | |
474 | call basically gives permission for the child to exec. | |
c5aa993b | 475 | */ |
c906108c SS |
476 | |
477 | target_acknowledge_created_inferior (pid); | |
478 | ||
479 | /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, | |
480 | * and will be 1 or 2 depending on whether we're starting | |
481 | * without or with a shell. | |
482 | */ | |
483 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
484 | ||
485 | /* On some targets, there must be some explicit actions taken after | |
486 | the inferior has been started up. | |
c5aa993b | 487 | */ |
c906108c SS |
488 | target_post_startup_inferior (pid); |
489 | } | |
490 | ||
491 | /* Start an inferior Unix child process and sets inferior_pid to its pid. | |
492 | EXEC_FILE is the file to run. | |
493 | ALLARGS is a string containing the arguments to the program. | |
494 | ENV is the environment vector to pass. Errors reported with error(). */ | |
495 | ||
496 | static void | |
497 | child_create_inferior (exec_file, allargs, env) | |
498 | char *exec_file; | |
499 | char *allargs; | |
500 | char **env; | |
501 | { | |
c906108c | 502 | #ifdef HPUXHPPA |
c906108c SS |
503 | fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, pre_fork_inferior, NULL); |
504 | #else | |
c5aa993b | 505 | fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, NULL, NULL); |
c906108c SS |
506 | #endif |
507 | /* We are at the first instruction we care about. */ | |
508 | /* Pedal to the metal... */ | |
2acceee2 | 509 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
510 | } |
511 | ||
512 | #if !defined(CHILD_POST_STARTUP_INFERIOR) | |
513 | void | |
514 | child_post_startup_inferior (pid) | |
c5aa993b | 515 | int pid; |
c906108c SS |
516 | { |
517 | /* This version of Unix doesn't require a meaningful "post startup inferior" | |
518 | operation by a debugger. | |
c5aa993b | 519 | */ |
c906108c SS |
520 | } |
521 | #endif | |
522 | ||
523 | #if !defined(CHILD_ACKNOWLEDGE_CREATED_INFERIOR) | |
524 | void | |
525 | child_acknowledge_created_inferior (pid) | |
c5aa993b | 526 | int pid; |
c906108c SS |
527 | { |
528 | /* This version of Unix doesn't require a meaningful "acknowledge created inferior" | |
529 | operation by a debugger. | |
c5aa993b | 530 | */ |
c906108c SS |
531 | } |
532 | #endif | |
533 | ||
534 | ||
535 | void | |
536 | child_clone_and_follow_inferior (child_pid, followed_child) | |
c5aa993b JM |
537 | int child_pid; |
538 | int *followed_child; | |
c906108c SS |
539 | { |
540 | clone_and_follow_inferior (child_pid, followed_child); | |
541 | ||
542 | /* Don't resume CHILD_PID; it's stopped where it ought to be, until | |
543 | the decision gets made elsewhere how to continue it. | |
c5aa993b | 544 | */ |
c906108c SS |
545 | } |
546 | ||
547 | ||
548 | #if !defined(CHILD_POST_FOLLOW_INFERIOR_BY_CLONE) | |
549 | void | |
550 | child_post_follow_inferior_by_clone () | |
551 | { | |
552 | /* This version of Unix doesn't require a meaningful "post follow inferior" | |
553 | operation by a clone debugger. | |
c5aa993b | 554 | */ |
c906108c SS |
555 | } |
556 | #endif | |
557 | ||
558 | #if !defined(CHILD_INSERT_FORK_CATCHPOINT) | |
559 | int | |
560 | child_insert_fork_catchpoint (pid) | |
561 | int pid; | |
562 | { | |
563 | /* This version of Unix doesn't support notification of fork events. */ | |
564 | return 0; | |
565 | } | |
566 | #endif | |
567 | ||
568 | #if !defined(CHILD_REMOVE_FORK_CATCHPOINT) | |
569 | int | |
570 | child_remove_fork_catchpoint (pid) | |
571 | int pid; | |
572 | { | |
573 | /* This version of Unix doesn't support notification of fork events. */ | |
574 | return 0; | |
575 | } | |
576 | #endif | |
577 | ||
578 | #if !defined(CHILD_INSERT_VFORK_CATCHPOINT) | |
579 | int | |
580 | child_insert_vfork_catchpoint (pid) | |
581 | int pid; | |
582 | { | |
583 | /* This version of Unix doesn't support notification of vfork events. */ | |
584 | return 0; | |
585 | } | |
586 | #endif | |
587 | ||
588 | #if !defined(CHILD_REMOVE_VFORK_CATCHPOINT) | |
589 | int | |
590 | child_remove_vfork_catchpoint (pid) | |
591 | int pid; | |
592 | { | |
593 | /* This version of Unix doesn't support notification of vfork events. */ | |
594 | return 0; | |
595 | } | |
596 | #endif | |
597 | ||
598 | #if !defined(CHILD_HAS_FORKED) | |
599 | int | |
600 | child_has_forked (pid, child_pid) | |
601 | int pid; | |
602 | int *child_pid; | |
603 | { | |
604 | /* This version of Unix doesn't support notification of fork events. */ | |
605 | return 0; | |
606 | } | |
607 | #endif | |
608 | ||
609 | ||
610 | #if !defined(CHILD_HAS_VFORKED) | |
611 | int | |
612 | child_has_vforked (pid, child_pid) | |
c5aa993b JM |
613 | int pid; |
614 | int *child_pid; | |
c906108c SS |
615 | { |
616 | /* This version of Unix doesn't support notification of vfork events. | |
c5aa993b | 617 | */ |
c906108c SS |
618 | return 0; |
619 | } | |
620 | #endif | |
621 | ||
622 | ||
623 | #if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC) | |
624 | int | |
625 | child_can_follow_vfork_prior_to_exec () | |
626 | { | |
627 | /* This version of Unix doesn't support notification of vfork events. | |
628 | However, if it did, it probably wouldn't allow vforks to be followed | |
629 | before the following exec. | |
c5aa993b | 630 | */ |
c906108c SS |
631 | return 0; |
632 | } | |
633 | #endif | |
634 | ||
635 | ||
636 | #if !defined(CHILD_POST_FOLLOW_VFORK) | |
637 | void | |
638 | child_post_follow_vfork (parent_pid, followed_parent, child_pid, followed_child) | |
c5aa993b JM |
639 | int parent_pid; |
640 | int followed_parent; | |
641 | int child_pid; | |
642 | int followed_child; | |
c906108c SS |
643 | { |
644 | /* This version of Unix doesn't require a meaningful "post follow vfork" | |
645 | operation by a clone debugger. | |
c5aa993b | 646 | */ |
c906108c SS |
647 | } |
648 | #endif | |
649 | ||
650 | #if !defined(CHILD_INSERT_EXEC_CATCHPOINT) | |
651 | int | |
652 | child_insert_exec_catchpoint (pid) | |
653 | int pid; | |
654 | { | |
655 | /* This version of Unix doesn't support notification of exec events. */ | |
656 | return 0; | |
657 | } | |
658 | #endif | |
659 | ||
660 | #if !defined(CHILD_REMOVE_EXEC_CATCHPOINT) | |
661 | int | |
662 | child_remove_exec_catchpoint (pid) | |
663 | int pid; | |
664 | { | |
665 | /* This version of Unix doesn't support notification of exec events. */ | |
666 | return 0; | |
667 | } | |
668 | #endif | |
669 | ||
670 | #if !defined(CHILD_HAS_EXECD) | |
671 | int | |
672 | child_has_execd (pid, execd_pathname) | |
c5aa993b JM |
673 | int pid; |
674 | char **execd_pathname; | |
c906108c SS |
675 | { |
676 | /* This version of Unix doesn't support notification of exec events. | |
c5aa993b | 677 | */ |
c906108c SS |
678 | return 0; |
679 | } | |
680 | #endif | |
681 | ||
682 | ||
683 | #if !defined(CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL) | |
684 | int | |
685 | child_reported_exec_events_per_exec_call () | |
686 | { | |
687 | /* This version of Unix doesn't support notification of exec events. | |
c5aa993b | 688 | */ |
c906108c SS |
689 | return 1; |
690 | } | |
691 | #endif | |
692 | ||
693 | ||
694 | #if !defined(CHILD_HAS_SYSCALL_EVENT) | |
695 | int | |
696 | child_has_syscall_event (pid, kind, syscall_id) | |
c5aa993b JM |
697 | int pid; |
698 | enum target_waitkind *kind; | |
699 | int *syscall_id; | |
c906108c SS |
700 | { |
701 | /* This version of Unix doesn't support notification of syscall events. | |
c5aa993b | 702 | */ |
c906108c SS |
703 | return 0; |
704 | } | |
705 | #endif | |
706 | ||
707 | ||
708 | #if !defined(CHILD_HAS_EXITED) | |
709 | int | |
710 | child_has_exited (pid, wait_status, exit_status) | |
c5aa993b JM |
711 | int pid; |
712 | int wait_status; | |
713 | int *exit_status; | |
c906108c SS |
714 | { |
715 | if (WIFEXITED (wait_status)) | |
716 | { | |
717 | *exit_status = WEXITSTATUS (wait_status); | |
718 | return 1; | |
719 | } | |
720 | ||
721 | if (WIFSIGNALED (wait_status)) | |
722 | { | |
c5aa993b | 723 | *exit_status = 0; /* ?? Don't know what else to say here. */ |
c906108c SS |
724 | return 1; |
725 | } | |
726 | ||
727 | /* ?? Do we really need to consult the event state, too? Assume the | |
c5aa993b | 728 | wait_state alone suffices. |
c906108c SS |
729 | */ |
730 | return 0; | |
731 | } | |
732 | #endif | |
733 | ||
734 | ||
735 | static void | |
736 | child_mourn_inferior () | |
737 | { | |
c906108c | 738 | unpush_target (&child_ops); |
c906108c SS |
739 | generic_mourn_inferior (); |
740 | } | |
741 | ||
742 | static int | |
743 | child_can_run () | |
744 | { | |
745 | /* This variable is controlled by modules that sit atop inftarg that may layer | |
746 | their own process structure atop that provided here. hpux-thread.c does | |
747 | this because of the Hpux user-mode level thread model. */ | |
748 | ||
749 | return !child_suppress_run; | |
750 | } | |
751 | ||
752 | /* Send a SIGINT to the process group. This acts just like the user typed a | |
753 | ^C on the controlling terminal. | |
754 | ||
755 | XXX - This may not be correct for all systems. Some may want to use | |
756 | killpg() instead of kill (-pgrp). */ | |
757 | ||
758 | static void | |
759 | child_stop () | |
760 | { | |
761 | extern pid_t inferior_process_group; | |
762 | ||
763 | kill (-inferior_process_group, SIGINT); | |
764 | } | |
765 | ||
766 | #if !defined(CHILD_ENABLE_EXCEPTION_CALLBACK) | |
767 | struct symtab_and_line * | |
768 | child_enable_exception_callback (kind, enable) | |
c5aa993b JM |
769 | enum exception_event_kind kind; |
770 | int enable; | |
c906108c SS |
771 | { |
772 | return (struct symtab_and_line *) NULL; | |
773 | } | |
774 | #endif | |
775 | ||
776 | #if !defined(CHILD_GET_CURRENT_EXCEPTION_EVENT) | |
777 | struct exception_event_record * | |
778 | child_get_current_exception_event () | |
779 | { | |
780 | return (struct exception_event_record *) NULL; | |
781 | } | |
782 | #endif | |
783 | ||
784 | ||
785 | #if !defined(CHILD_PID_TO_EXEC_FILE) | |
786 | char * | |
787 | child_pid_to_exec_file (pid) | |
c5aa993b | 788 | int pid; |
c906108c SS |
789 | { |
790 | /* This version of Unix doesn't support translation of a process ID | |
791 | to the filename of the executable file. | |
c5aa993b | 792 | */ |
c906108c SS |
793 | return NULL; |
794 | } | |
795 | #endif | |
796 | ||
797 | char * | |
798 | child_core_file_to_sym_file (core) | |
c5aa993b | 799 | char *core; |
c906108c SS |
800 | { |
801 | /* The target stratum for a running executable need not support | |
802 | this operation. | |
c5aa993b | 803 | */ |
c906108c SS |
804 | return NULL; |
805 | } | |
c5aa993b | 806 | \f |
c906108c | 807 | |
ed9a39eb JM |
808 | #if !defined(CHILD_PID_TO_STR) |
809 | char * | |
810 | child_pid_to_str (pid) | |
811 | int pid; | |
812 | { | |
813 | return normal_pid_to_str (pid); | |
814 | } | |
815 | #endif | |
c906108c | 816 | |
c906108c SS |
817 | static void |
818 | init_child_ops () | |
819 | { | |
820 | child_ops.to_shortname = "child"; | |
821 | child_ops.to_longname = "Unix child process"; | |
822 | child_ops.to_doc = "Unix child process (started by the \"run\" command)."; | |
823 | child_ops.to_open = child_open; | |
824 | child_ops.to_attach = child_attach; | |
825 | child_ops.to_post_attach = child_post_attach; | |
826 | child_ops.to_require_attach = child_require_attach; | |
827 | child_ops.to_detach = child_detach; | |
828 | child_ops.to_require_detach = child_require_detach; | |
829 | child_ops.to_resume = child_resume; | |
830 | child_ops.to_wait = child_wait; | |
831 | child_ops.to_post_wait = child_post_wait; | |
832 | child_ops.to_fetch_registers = fetch_inferior_registers; | |
833 | child_ops.to_store_registers = store_inferior_registers; | |
834 | child_ops.to_prepare_to_store = child_prepare_to_store; | |
835 | child_ops.to_xfer_memory = child_xfer_memory; | |
836 | child_ops.to_files_info = child_files_info; | |
837 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
838 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
839 | child_ops.to_terminal_init = terminal_init_inferior; | |
840 | child_ops.to_terminal_inferior = terminal_inferior; | |
841 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
842 | child_ops.to_terminal_ours = terminal_ours; | |
843 | child_ops.to_terminal_info = child_terminal_info; | |
844 | child_ops.to_kill = kill_inferior; | |
845 | child_ops.to_create_inferior = child_create_inferior; | |
846 | child_ops.to_post_startup_inferior = child_post_startup_inferior; | |
847 | child_ops.to_acknowledge_created_inferior = child_acknowledge_created_inferior; | |
848 | child_ops.to_clone_and_follow_inferior = child_clone_and_follow_inferior; | |
849 | child_ops.to_post_follow_inferior_by_clone = child_post_follow_inferior_by_clone; | |
850 | child_ops.to_insert_fork_catchpoint = child_insert_fork_catchpoint; | |
851 | child_ops.to_remove_fork_catchpoint = child_remove_fork_catchpoint; | |
852 | child_ops.to_insert_vfork_catchpoint = child_insert_vfork_catchpoint; | |
853 | child_ops.to_remove_vfork_catchpoint = child_remove_vfork_catchpoint; | |
854 | child_ops.to_has_forked = child_has_forked; | |
855 | child_ops.to_has_vforked = child_has_vforked; | |
856 | child_ops.to_can_follow_vfork_prior_to_exec = child_can_follow_vfork_prior_to_exec; | |
857 | child_ops.to_post_follow_vfork = child_post_follow_vfork; | |
858 | child_ops.to_insert_exec_catchpoint = child_insert_exec_catchpoint; | |
859 | child_ops.to_remove_exec_catchpoint = child_remove_exec_catchpoint; | |
860 | child_ops.to_has_execd = child_has_execd; | |
861 | child_ops.to_reported_exec_events_per_exec_call = child_reported_exec_events_per_exec_call; | |
862 | child_ops.to_has_syscall_event = child_has_syscall_event; | |
863 | child_ops.to_has_exited = child_has_exited; | |
864 | child_ops.to_mourn_inferior = child_mourn_inferior; | |
865 | child_ops.to_can_run = child_can_run; | |
866 | child_ops.to_thread_alive = child_thread_alive; | |
ed9a39eb | 867 | child_ops.to_pid_to_str = child_pid_to_str; |
c906108c SS |
868 | child_ops.to_stop = child_stop; |
869 | child_ops.to_enable_exception_callback = child_enable_exception_callback; | |
870 | child_ops.to_get_current_exception_event = child_get_current_exception_event; | |
871 | child_ops.to_pid_to_exec_file = child_pid_to_exec_file; | |
872 | child_ops.to_core_file_to_sym_file = child_core_file_to_sym_file; | |
873 | child_ops.to_stratum = process_stratum; | |
874 | child_ops.to_has_all_memory = 1; | |
875 | child_ops.to_has_memory = 1; | |
876 | child_ops.to_has_stack = 1; | |
877 | child_ops.to_has_registers = 1; | |
878 | child_ops.to_has_execution = 1; | |
879 | child_ops.to_magic = OPS_MAGIC; | |
880 | } | |
881 | ||
882 | void | |
883 | _initialize_inftarg () | |
884 | { | |
885 | #ifdef HAVE_OPTIONAL_PROC_FS | |
886 | char procname[32]; | |
887 | int fd; | |
888 | ||
889 | /* If we have an optional /proc filesystem (e.g. under OSF/1), | |
890 | don't add ptrace support if we can access the running GDB via /proc. */ | |
891 | #ifndef PROC_NAME_FMT | |
892 | #define PROC_NAME_FMT "/proc/%05d" | |
893 | #endif | |
894 | sprintf (procname, PROC_NAME_FMT, getpid ()); | |
895 | if ((fd = open (procname, O_RDONLY)) >= 0) | |
896 | { | |
897 | close (fd); | |
898 | return; | |
899 | } | |
900 | #endif | |
901 | ||
902 | init_child_ops (); | |
903 | add_target (&child_ops); | |
904 | } |