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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 | ||
35 | #ifdef HAVE_WAIT_H | |
c5aa993b | 36 | #include <wait.h> |
c906108c | 37 | #else |
c5aa993b JM |
38 | #ifdef HAVE_SYS_WAIT_H |
39 | #include <sys/wait.h> | |
40 | #endif | |
c906108c SS |
41 | #endif |
42 | ||
43 | /* "wait.h" fills in the gaps left by <wait.h> */ | |
44 | #include "wait.h" | |
45 | #ifdef HAVE_UNISTD_H | |
46 | #include <unistd.h> | |
47 | #endif | |
48 | ||
49 | extern struct symtab_and_line * | |
c5aa993b | 50 | child_enable_exception_callback PARAMS ((enum exception_event_kind, int)); |
c906108c SS |
51 | |
52 | extern struct exception_event_record * | |
c5aa993b | 53 | child_get_current_exception_event PARAMS ((void)); |
c906108c SS |
54 | |
55 | extern void _initialize_inftarg PARAMS ((void)); | |
56 | ||
57 | static void | |
58 | child_prepare_to_store PARAMS ((void)); | |
59 | ||
60 | #ifndef CHILD_WAIT | |
61 | static int child_wait PARAMS ((int, struct target_waitstatus *)); | |
62 | #endif /* CHILD_WAIT */ | |
63 | ||
64 | #if !defined(CHILD_POST_WAIT) | |
65 | void | |
66 | child_post_wait PARAMS ((int, int)); | |
67 | #endif | |
68 | ||
69 | static void child_open PARAMS ((char *, int)); | |
70 | ||
71 | static void | |
72 | child_files_info PARAMS ((struct target_ops *)); | |
73 | ||
74 | static void | |
75 | child_detach PARAMS ((char *, int)); | |
76 | ||
77 | static void | |
78 | child_detach_from_process PARAMS ((int, char *, int, int)); | |
79 | ||
80 | static void | |
81 | child_attach PARAMS ((char *, int)); | |
82 | ||
83 | static void | |
84 | child_attach_to_process PARAMS ((char *, int, int)); | |
85 | ||
86 | #if !defined(CHILD_POST_ATTACH) | |
87 | extern void child_post_attach PARAMS ((int)); | |
88 | #endif | |
89 | ||
90 | static void | |
91 | child_require_attach PARAMS ((char *, int)); | |
92 | ||
93 | static void | |
94 | child_require_detach PARAMS ((int, char *, int)); | |
95 | ||
96 | static void | |
97 | ptrace_me PARAMS ((void)); | |
98 | ||
c5aa993b | 99 | static void |
c906108c SS |
100 | ptrace_him PARAMS ((int)); |
101 | ||
c5aa993b | 102 | static void |
c906108c SS |
103 | child_create_inferior PARAMS ((char *, char *, char **)); |
104 | ||
105 | static void | |
106 | child_mourn_inferior PARAMS ((void)); | |
107 | ||
108 | static int | |
109 | child_can_run PARAMS ((void)); | |
110 | ||
111 | static void | |
112 | child_stop PARAMS ((void)); | |
113 | ||
114 | #ifndef CHILD_THREAD_ALIVE | |
115 | int child_thread_alive PARAMS ((int)); | |
116 | #endif | |
117 | ||
118 | static void init_child_ops PARAMS ((void)); | |
119 | ||
120 | extern char **environ; | |
121 | ||
122 | struct target_ops child_ops; | |
123 | ||
124 | int child_suppress_run = 0; /* Non-zero if inftarg should pretend not to | |
125 | be a runnable target. Used by targets | |
126 | that can sit atop inftarg, such as HPUX | |
127 | thread support. */ | |
128 | ||
129 | #ifndef CHILD_WAIT | |
130 | ||
c5aa993b | 131 | /*## */ |
c906108c SS |
132 | /* Enable HACK for ttrace work. In |
133 | * infttrace.c/require_notification_of_events, | |
134 | * this is set to 0 so that the loop in child_wait | |
135 | * won't loop. | |
136 | */ | |
137 | int not_same_real_pid = 1; | |
c5aa993b | 138 | /*## */ |
c906108c SS |
139 | |
140 | ||
141 | /* Wait for child to do something. Return pid of child, or -1 in case | |
142 | of error; store status through argument pointer OURSTATUS. */ | |
143 | ||
144 | static int | |
145 | child_wait (pid, ourstatus) | |
146 | int pid; | |
147 | struct target_waitstatus *ourstatus; | |
148 | { | |
149 | int save_errno; | |
150 | int status; | |
7a292a7a | 151 | char *execd_pathname = NULL; |
c5aa993b JM |
152 | int exit_status; |
153 | int related_pid; | |
154 | int syscall_id; | |
155 | enum target_waitkind kind; | |
c906108c | 156 | |
c5aa993b JM |
157 | do |
158 | { | |
159 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
160 | attached process. */ | |
161 | set_sigio_trap (); | |
c906108c | 162 | |
c5aa993b | 163 | pid = ptrace_wait (inferior_pid, &status); |
c906108c | 164 | |
c5aa993b | 165 | save_errno = errno; |
c906108c | 166 | |
c5aa993b | 167 | clear_sigio_trap (); |
c906108c | 168 | |
c5aa993b | 169 | clear_sigint_trap (); |
c906108c | 170 | |
c5aa993b JM |
171 | if (pid == -1) |
172 | { | |
173 | if (save_errno == EINTR) | |
174 | continue; | |
c906108c | 175 | |
c5aa993b JM |
176 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", |
177 | safe_strerror (save_errno)); | |
c906108c | 178 | |
c5aa993b JM |
179 | /* Claim it exited with unknown signal. */ |
180 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
181 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
182 | return -1; | |
183 | } | |
c906108c | 184 | |
c5aa993b | 185 | /* Did it exit? |
c906108c | 186 | */ |
c5aa993b JM |
187 | if (target_has_exited (pid, status, &exit_status)) |
188 | { | |
189 | /* ??rehrauer: For now, ignore this. */ | |
190 | continue; | |
191 | } | |
192 | ||
193 | if (!target_thread_alive (pid)) | |
194 | { | |
195 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
196 | return pid; | |
197 | } | |
198 | ||
199 | if (target_has_forked (pid, &related_pid) | |
200 | && ((pid == inferior_pid) || (related_pid == inferior_pid))) | |
201 | { | |
202 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
203 | ourstatus->value.related_pid = related_pid; | |
204 | return pid; | |
205 | } | |
206 | ||
207 | if (target_has_vforked (pid, &related_pid) | |
208 | && ((pid == inferior_pid) || (related_pid == inferior_pid))) | |
209 | { | |
210 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
211 | ourstatus->value.related_pid = related_pid; | |
212 | return pid; | |
213 | } | |
214 | ||
215 | if (target_has_execd (pid, &execd_pathname)) | |
216 | { | |
217 | /* Are we ignoring initial exec events? (This is likely because | |
218 | we're in the process of starting up the inferior, and another | |
219 | (older) mechanism handles those.) If so, we'll report this | |
220 | as a regular stop, not an exec. | |
221 | */ | |
222 | if (inferior_ignoring_startup_exec_events) | |
223 | { | |
224 | inferior_ignoring_startup_exec_events--; | |
225 | } | |
226 | else | |
227 | { | |
228 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
229 | ourstatus->value.execd_pathname = execd_pathname; | |
230 | return pid; | |
231 | } | |
232 | } | |
233 | ||
234 | /* All we must do with these is communicate their occurrence | |
235 | to wait_for_inferior... | |
236 | */ | |
237 | if (target_has_syscall_event (pid, &kind, &syscall_id)) | |
238 | { | |
239 | ourstatus->kind = kind; | |
240 | ourstatus->value.syscall_id = syscall_id; | |
241 | return pid; | |
242 | } | |
243 | ||
244 | /*## } while (pid != inferior_pid); ## *//* Some other child died or stopped */ | |
c906108c | 245 | /* hack for thread testing */ |
c5aa993b JM |
246 | } |
247 | while ((pid != inferior_pid) && not_same_real_pid); | |
248 | /*## */ | |
c906108c SS |
249 | |
250 | store_waitstatus (ourstatus, status); | |
251 | return pid; | |
252 | } | |
253 | #endif /* CHILD_WAIT */ | |
254 | ||
255 | #if !defined(CHILD_POST_WAIT) | |
256 | void | |
257 | child_post_wait (pid, wait_status) | |
c5aa993b JM |
258 | int pid; |
259 | int wait_status; | |
c906108c SS |
260 | { |
261 | /* This version of Unix doesn't require a meaningful "post wait" | |
262 | operation. | |
c5aa993b | 263 | */ |
c906108c SS |
264 | } |
265 | #endif | |
c5aa993b | 266 | |
c906108c SS |
267 | |
268 | #ifndef CHILD_THREAD_ALIVE | |
269 | ||
270 | /* Check to see if the given thread is alive. | |
271 | ||
272 | FIXME: Is kill() ever the right way to do this? I doubt it, but | |
273 | for now we're going to try and be compatable with the old thread | |
274 | code. */ | |
275 | int | |
276 | child_thread_alive (pid) | |
277 | int pid; | |
278 | { | |
279 | return (kill (pid, 0) != -1); | |
280 | } | |
281 | ||
282 | #endif | |
283 | ||
284 | static void | |
285 | child_attach_to_process (args, from_tty, after_fork) | |
c5aa993b JM |
286 | char *args; |
287 | int from_tty; | |
288 | int after_fork; | |
c906108c SS |
289 | { |
290 | if (!args) | |
291 | error_no_arg ("process-id to attach"); | |
292 | ||
293 | #ifndef ATTACH_DETACH | |
294 | error ("Can't attach to a process on this machine."); | |
295 | #else | |
296 | { | |
297 | char *exec_file; | |
298 | int pid; | |
299 | char *dummy; | |
300 | ||
301 | dummy = args; | |
302 | pid = strtol (args, &dummy, 0); | |
303 | /* Some targets don't set errno on errors, grrr! */ | |
304 | if ((pid == 0) && (args == dummy)) | |
305 | error ("Illegal process-id: %s\n", args); | |
306 | ||
c5aa993b | 307 | if (pid == getpid ()) /* Trying to masturbate? */ |
c906108c SS |
308 | error ("I refuse to debug myself!"); |
309 | ||
310 | if (from_tty) | |
311 | { | |
312 | exec_file = (char *) get_exec_file (0); | |
313 | ||
314 | if (after_fork) | |
c5aa993b JM |
315 | printf_unfiltered ("Attaching after fork to %s\n", |
316 | target_pid_to_str (pid)); | |
c906108c SS |
317 | else if (exec_file) |
318 | printf_unfiltered ("Attaching to program: %s, %s\n", exec_file, | |
c5aa993b JM |
319 | target_pid_to_str (pid)); |
320 | else | |
321 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); | |
c906108c SS |
322 | |
323 | gdb_flush (gdb_stdout); | |
324 | } | |
325 | ||
326 | if (!after_fork) | |
327 | attach (pid); | |
328 | else | |
329 | REQUIRE_ATTACH (pid); | |
330 | ||
331 | inferior_pid = pid; | |
332 | push_target (&child_ops); | |
333 | } | |
c5aa993b | 334 | #endif /* ATTACH_DETACH */ |
c906108c SS |
335 | } |
336 | ||
337 | ||
338 | /* Attach to process PID, then initialize for debugging it. */ | |
339 | ||
340 | static void | |
341 | child_attach (args, from_tty) | |
342 | char *args; | |
343 | int from_tty; | |
344 | { | |
345 | child_attach_to_process (args, from_tty, 0); | |
346 | } | |
347 | ||
348 | #if !defined(CHILD_POST_ATTACH) | |
349 | void | |
350 | child_post_attach (pid) | |
c5aa993b | 351 | int pid; |
c906108c SS |
352 | { |
353 | /* This version of Unix doesn't require a meaningful "post attach" | |
354 | operation by a debugger. */ | |
355 | } | |
356 | #endif | |
357 | ||
358 | static void | |
359 | child_require_attach (args, from_tty) | |
360 | char *args; | |
361 | int from_tty; | |
362 | { | |
363 | child_attach_to_process (args, from_tty, 1); | |
c5aa993b | 364 | } |
c906108c SS |
365 | |
366 | static void | |
367 | child_detach_from_process (pid, args, from_tty, after_fork) | |
c5aa993b JM |
368 | int pid; |
369 | char *args; | |
370 | int from_tty; | |
371 | int after_fork; | |
c906108c SS |
372 | { |
373 | #ifdef ATTACH_DETACH | |
374 | { | |
375 | int siggnal = 0; | |
376 | ||
377 | if (from_tty) | |
378 | { | |
379 | char *exec_file = get_exec_file (0); | |
380 | if (exec_file == 0) | |
381 | exec_file = ""; | |
c5aa993b JM |
382 | if (after_fork) |
383 | printf_unfiltered ("Detaching after fork from %s\n", | |
384 | target_pid_to_str (pid)); | |
385 | else | |
c906108c | 386 | printf_unfiltered ("Detaching from program: %s, %s\n", exec_file, |
c5aa993b | 387 | target_pid_to_str (pid)); |
c906108c SS |
388 | gdb_flush (gdb_stdout); |
389 | } | |
390 | if (args) | |
391 | siggnal = atoi (args); | |
392 | ||
393 | if (!after_fork) | |
394 | detach (siggnal); | |
395 | else | |
396 | REQUIRE_DETACH (pid, siggnal); | |
397 | } | |
398 | #else | |
399 | error ("This version of Unix does not support detaching a process."); | |
400 | #endif | |
401 | } | |
402 | ||
403 | /* Take a program previously attached to and detaches it. | |
404 | The program resumes execution and will no longer stop | |
405 | on signals, etc. We'd better not have left any breakpoints | |
406 | in the program or it'll die when it hits one. For this | |
407 | to work, it may be necessary for the process to have been | |
408 | previously attached. It *might* work if the program was | |
409 | started via the normal ptrace (PTRACE_TRACEME). */ | |
410 | ||
411 | static void | |
412 | child_detach (args, from_tty) | |
413 | char *args; | |
414 | int from_tty; | |
415 | { | |
416 | child_detach_from_process (inferior_pid, args, from_tty, 0); | |
417 | inferior_pid = 0; | |
418 | unpush_target (&child_ops); | |
419 | } | |
420 | ||
421 | static void | |
422 | child_require_detach (pid, args, from_tty) | |
c5aa993b JM |
423 | int pid; |
424 | char *args; | |
425 | int from_tty; | |
c906108c SS |
426 | { |
427 | child_detach_from_process (pid, args, from_tty, 1); | |
428 | } | |
429 | ||
430 | ||
431 | /* Get ready to modify the registers array. On machines which store | |
432 | individual registers, this doesn't need to do anything. On machines | |
433 | which store all the registers in one fell swoop, this makes sure | |
434 | that registers contains all the registers from the program being | |
435 | debugged. */ | |
436 | ||
437 | static void | |
438 | child_prepare_to_store () | |
439 | { | |
440 | #ifdef CHILD_PREPARE_TO_STORE | |
441 | CHILD_PREPARE_TO_STORE (); | |
442 | #endif | |
443 | } | |
444 | ||
445 | /* Print status information about what we're accessing. */ | |
446 | ||
447 | static void | |
448 | child_files_info (ignore) | |
449 | struct target_ops *ignore; | |
450 | { | |
451 | printf_unfiltered ("\tUsing the running image of %s %s.\n", | |
c5aa993b | 452 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid)); |
c906108c SS |
453 | } |
454 | ||
455 | /* ARGSUSED */ | |
456 | static void | |
457 | child_open (arg, from_tty) | |
458 | char *arg; | |
459 | int from_tty; | |
460 | { | |
461 | error ("Use the \"run\" command to start a Unix child process."); | |
462 | } | |
463 | ||
464 | /* Stub function which causes the inferior that runs it, to be ptrace-able | |
465 | by its parent process. */ | |
466 | ||
467 | static void | |
468 | ptrace_me () | |
469 | { | |
470 | /* "Trace me, Dr. Memory!" */ | |
471 | call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0); | |
472 | } | |
473 | ||
474 | /* Stub function which causes the GDB that runs it, to start ptrace-ing | |
475 | the child process. */ | |
476 | ||
c5aa993b | 477 | static void |
c906108c SS |
478 | ptrace_him (pid) |
479 | int pid; | |
480 | { | |
481 | push_target (&child_ops); | |
482 | ||
483 | /* On some targets, there must be some explicit synchronization | |
484 | between the parent and child processes after the debugger | |
485 | forks, and before the child execs the debuggee program. This | |
486 | call basically gives permission for the child to exec. | |
c5aa993b | 487 | */ |
c906108c SS |
488 | |
489 | target_acknowledge_created_inferior (pid); | |
490 | ||
491 | /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, | |
492 | * and will be 1 or 2 depending on whether we're starting | |
493 | * without or with a shell. | |
494 | */ | |
495 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
496 | ||
497 | /* On some targets, there must be some explicit actions taken after | |
498 | the inferior has been started up. | |
c5aa993b | 499 | */ |
c906108c SS |
500 | target_post_startup_inferior (pid); |
501 | } | |
502 | ||
503 | /* Start an inferior Unix child process and sets inferior_pid to its pid. | |
504 | EXEC_FILE is the file to run. | |
505 | ALLARGS is a string containing the arguments to the program. | |
506 | ENV is the environment vector to pass. Errors reported with error(). */ | |
507 | ||
508 | static void | |
509 | child_create_inferior (exec_file, allargs, env) | |
510 | char *exec_file; | |
511 | char *allargs; | |
512 | char **env; | |
513 | { | |
c906108c | 514 | #ifdef HPUXHPPA |
c906108c SS |
515 | fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, pre_fork_inferior, NULL); |
516 | #else | |
c5aa993b | 517 | fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, NULL, NULL); |
c906108c SS |
518 | #endif |
519 | /* We are at the first instruction we care about. */ | |
520 | /* Pedal to the metal... */ | |
c5aa993b | 521 | proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0); |
c906108c SS |
522 | } |
523 | ||
524 | #if !defined(CHILD_POST_STARTUP_INFERIOR) | |
525 | void | |
526 | child_post_startup_inferior (pid) | |
c5aa993b | 527 | int pid; |
c906108c SS |
528 | { |
529 | /* This version of Unix doesn't require a meaningful "post startup inferior" | |
530 | operation by a debugger. | |
c5aa993b | 531 | */ |
c906108c SS |
532 | } |
533 | #endif | |
534 | ||
535 | #if !defined(CHILD_ACKNOWLEDGE_CREATED_INFERIOR) | |
536 | void | |
537 | child_acknowledge_created_inferior (pid) | |
c5aa993b | 538 | int pid; |
c906108c SS |
539 | { |
540 | /* This version of Unix doesn't require a meaningful "acknowledge created inferior" | |
541 | operation by a debugger. | |
c5aa993b | 542 | */ |
c906108c SS |
543 | } |
544 | #endif | |
545 | ||
546 | ||
547 | void | |
548 | child_clone_and_follow_inferior (child_pid, followed_child) | |
c5aa993b JM |
549 | int child_pid; |
550 | int *followed_child; | |
c906108c SS |
551 | { |
552 | clone_and_follow_inferior (child_pid, followed_child); | |
553 | ||
554 | /* Don't resume CHILD_PID; it's stopped where it ought to be, until | |
555 | the decision gets made elsewhere how to continue it. | |
c5aa993b | 556 | */ |
c906108c SS |
557 | } |
558 | ||
559 | ||
560 | #if !defined(CHILD_POST_FOLLOW_INFERIOR_BY_CLONE) | |
561 | void | |
562 | child_post_follow_inferior_by_clone () | |
563 | { | |
564 | /* This version of Unix doesn't require a meaningful "post follow inferior" | |
565 | operation by a clone debugger. | |
c5aa993b | 566 | */ |
c906108c SS |
567 | } |
568 | #endif | |
569 | ||
570 | #if !defined(CHILD_INSERT_FORK_CATCHPOINT) | |
571 | int | |
572 | child_insert_fork_catchpoint (pid) | |
573 | int pid; | |
574 | { | |
575 | /* This version of Unix doesn't support notification of fork events. */ | |
576 | return 0; | |
577 | } | |
578 | #endif | |
579 | ||
580 | #if !defined(CHILD_REMOVE_FORK_CATCHPOINT) | |
581 | int | |
582 | child_remove_fork_catchpoint (pid) | |
583 | int pid; | |
584 | { | |
585 | /* This version of Unix doesn't support notification of fork events. */ | |
586 | return 0; | |
587 | } | |
588 | #endif | |
589 | ||
590 | #if !defined(CHILD_INSERT_VFORK_CATCHPOINT) | |
591 | int | |
592 | child_insert_vfork_catchpoint (pid) | |
593 | int pid; | |
594 | { | |
595 | /* This version of Unix doesn't support notification of vfork events. */ | |
596 | return 0; | |
597 | } | |
598 | #endif | |
599 | ||
600 | #if !defined(CHILD_REMOVE_VFORK_CATCHPOINT) | |
601 | int | |
602 | child_remove_vfork_catchpoint (pid) | |
603 | int pid; | |
604 | { | |
605 | /* This version of Unix doesn't support notification of vfork events. */ | |
606 | return 0; | |
607 | } | |
608 | #endif | |
609 | ||
610 | #if !defined(CHILD_HAS_FORKED) | |
611 | int | |
612 | child_has_forked (pid, child_pid) | |
613 | int pid; | |
614 | int *child_pid; | |
615 | { | |
616 | /* This version of Unix doesn't support notification of fork events. */ | |
617 | return 0; | |
618 | } | |
619 | #endif | |
620 | ||
621 | ||
622 | #if !defined(CHILD_HAS_VFORKED) | |
623 | int | |
624 | child_has_vforked (pid, child_pid) | |
c5aa993b JM |
625 | int pid; |
626 | int *child_pid; | |
c906108c SS |
627 | { |
628 | /* This version of Unix doesn't support notification of vfork events. | |
c5aa993b | 629 | */ |
c906108c SS |
630 | return 0; |
631 | } | |
632 | #endif | |
633 | ||
634 | ||
635 | #if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC) | |
636 | int | |
637 | child_can_follow_vfork_prior_to_exec () | |
638 | { | |
639 | /* This version of Unix doesn't support notification of vfork events. | |
640 | However, if it did, it probably wouldn't allow vforks to be followed | |
641 | before the following exec. | |
c5aa993b | 642 | */ |
c906108c SS |
643 | return 0; |
644 | } | |
645 | #endif | |
646 | ||
647 | ||
648 | #if !defined(CHILD_POST_FOLLOW_VFORK) | |
649 | void | |
650 | child_post_follow_vfork (parent_pid, followed_parent, child_pid, followed_child) | |
c5aa993b JM |
651 | int parent_pid; |
652 | int followed_parent; | |
653 | int child_pid; | |
654 | int followed_child; | |
c906108c SS |
655 | { |
656 | /* This version of Unix doesn't require a meaningful "post follow vfork" | |
657 | operation by a clone debugger. | |
c5aa993b | 658 | */ |
c906108c SS |
659 | } |
660 | #endif | |
661 | ||
662 | #if !defined(CHILD_INSERT_EXEC_CATCHPOINT) | |
663 | int | |
664 | child_insert_exec_catchpoint (pid) | |
665 | int pid; | |
666 | { | |
667 | /* This version of Unix doesn't support notification of exec events. */ | |
668 | return 0; | |
669 | } | |
670 | #endif | |
671 | ||
672 | #if !defined(CHILD_REMOVE_EXEC_CATCHPOINT) | |
673 | int | |
674 | child_remove_exec_catchpoint (pid) | |
675 | int pid; | |
676 | { | |
677 | /* This version of Unix doesn't support notification of exec events. */ | |
678 | return 0; | |
679 | } | |
680 | #endif | |
681 | ||
682 | #if !defined(CHILD_HAS_EXECD) | |
683 | int | |
684 | child_has_execd (pid, execd_pathname) | |
c5aa993b JM |
685 | int pid; |
686 | char **execd_pathname; | |
c906108c SS |
687 | { |
688 | /* This version of Unix doesn't support notification of exec events. | |
c5aa993b | 689 | */ |
c906108c SS |
690 | return 0; |
691 | } | |
692 | #endif | |
693 | ||
694 | ||
695 | #if !defined(CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL) | |
696 | int | |
697 | child_reported_exec_events_per_exec_call () | |
698 | { | |
699 | /* This version of Unix doesn't support notification of exec events. | |
c5aa993b | 700 | */ |
c906108c SS |
701 | return 1; |
702 | } | |
703 | #endif | |
704 | ||
705 | ||
706 | #if !defined(CHILD_HAS_SYSCALL_EVENT) | |
707 | int | |
708 | child_has_syscall_event (pid, kind, syscall_id) | |
c5aa993b JM |
709 | int pid; |
710 | enum target_waitkind *kind; | |
711 | int *syscall_id; | |
c906108c SS |
712 | { |
713 | /* This version of Unix doesn't support notification of syscall events. | |
c5aa993b | 714 | */ |
c906108c SS |
715 | return 0; |
716 | } | |
717 | #endif | |
718 | ||
719 | ||
720 | #if !defined(CHILD_HAS_EXITED) | |
721 | int | |
722 | child_has_exited (pid, wait_status, exit_status) | |
c5aa993b JM |
723 | int pid; |
724 | int wait_status; | |
725 | int *exit_status; | |
c906108c SS |
726 | { |
727 | if (WIFEXITED (wait_status)) | |
728 | { | |
729 | *exit_status = WEXITSTATUS (wait_status); | |
730 | return 1; | |
731 | } | |
732 | ||
733 | if (WIFSIGNALED (wait_status)) | |
734 | { | |
c5aa993b | 735 | *exit_status = 0; /* ?? Don't know what else to say here. */ |
c906108c SS |
736 | return 1; |
737 | } | |
738 | ||
739 | /* ?? Do we really need to consult the event state, too? Assume the | |
c5aa993b | 740 | wait_state alone suffices. |
c906108c SS |
741 | */ |
742 | return 0; | |
743 | } | |
744 | #endif | |
745 | ||
746 | ||
747 | static void | |
748 | child_mourn_inferior () | |
749 | { | |
c906108c | 750 | unpush_target (&child_ops); |
c906108c SS |
751 | generic_mourn_inferior (); |
752 | } | |
753 | ||
754 | static int | |
755 | child_can_run () | |
756 | { | |
757 | /* This variable is controlled by modules that sit atop inftarg that may layer | |
758 | their own process structure atop that provided here. hpux-thread.c does | |
759 | this because of the Hpux user-mode level thread model. */ | |
760 | ||
761 | return !child_suppress_run; | |
762 | } | |
763 | ||
764 | /* Send a SIGINT to the process group. This acts just like the user typed a | |
765 | ^C on the controlling terminal. | |
766 | ||
767 | XXX - This may not be correct for all systems. Some may want to use | |
768 | killpg() instead of kill (-pgrp). */ | |
769 | ||
770 | static void | |
771 | child_stop () | |
772 | { | |
773 | extern pid_t inferior_process_group; | |
774 | ||
775 | kill (-inferior_process_group, SIGINT); | |
776 | } | |
777 | ||
778 | #if !defined(CHILD_ENABLE_EXCEPTION_CALLBACK) | |
779 | struct symtab_and_line * | |
780 | child_enable_exception_callback (kind, enable) | |
c5aa993b JM |
781 | enum exception_event_kind kind; |
782 | int enable; | |
c906108c SS |
783 | { |
784 | return (struct symtab_and_line *) NULL; | |
785 | } | |
786 | #endif | |
787 | ||
788 | #if !defined(CHILD_GET_CURRENT_EXCEPTION_EVENT) | |
789 | struct exception_event_record * | |
790 | child_get_current_exception_event () | |
791 | { | |
792 | return (struct exception_event_record *) NULL; | |
793 | } | |
794 | #endif | |
795 | ||
796 | ||
797 | #if !defined(CHILD_PID_TO_EXEC_FILE) | |
798 | char * | |
799 | child_pid_to_exec_file (pid) | |
c5aa993b | 800 | int pid; |
c906108c SS |
801 | { |
802 | /* This version of Unix doesn't support translation of a process ID | |
803 | to the filename of the executable file. | |
c5aa993b | 804 | */ |
c906108c SS |
805 | return NULL; |
806 | } | |
807 | #endif | |
808 | ||
809 | char * | |
810 | child_core_file_to_sym_file (core) | |
c5aa993b | 811 | char *core; |
c906108c SS |
812 | { |
813 | /* The target stratum for a running executable need not support | |
814 | this operation. | |
c5aa993b | 815 | */ |
c906108c SS |
816 | return NULL; |
817 | } | |
c5aa993b | 818 | \f |
c906108c SS |
819 | |
820 | ||
c906108c SS |
821 | static void |
822 | init_child_ops () | |
823 | { | |
824 | child_ops.to_shortname = "child"; | |
825 | child_ops.to_longname = "Unix child process"; | |
826 | child_ops.to_doc = "Unix child process (started by the \"run\" command)."; | |
827 | child_ops.to_open = child_open; | |
828 | child_ops.to_attach = child_attach; | |
829 | child_ops.to_post_attach = child_post_attach; | |
830 | child_ops.to_require_attach = child_require_attach; | |
831 | child_ops.to_detach = child_detach; | |
832 | child_ops.to_require_detach = child_require_detach; | |
833 | child_ops.to_resume = child_resume; | |
834 | child_ops.to_wait = child_wait; | |
835 | child_ops.to_post_wait = child_post_wait; | |
836 | child_ops.to_fetch_registers = fetch_inferior_registers; | |
837 | child_ops.to_store_registers = store_inferior_registers; | |
838 | child_ops.to_prepare_to_store = child_prepare_to_store; | |
839 | child_ops.to_xfer_memory = child_xfer_memory; | |
840 | child_ops.to_files_info = child_files_info; | |
841 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
842 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
843 | child_ops.to_terminal_init = terminal_init_inferior; | |
844 | child_ops.to_terminal_inferior = terminal_inferior; | |
845 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
846 | child_ops.to_terminal_ours = terminal_ours; | |
847 | child_ops.to_terminal_info = child_terminal_info; | |
848 | child_ops.to_kill = kill_inferior; | |
849 | child_ops.to_create_inferior = child_create_inferior; | |
850 | child_ops.to_post_startup_inferior = child_post_startup_inferior; | |
851 | child_ops.to_acknowledge_created_inferior = child_acknowledge_created_inferior; | |
852 | child_ops.to_clone_and_follow_inferior = child_clone_and_follow_inferior; | |
853 | child_ops.to_post_follow_inferior_by_clone = child_post_follow_inferior_by_clone; | |
854 | child_ops.to_insert_fork_catchpoint = child_insert_fork_catchpoint; | |
855 | child_ops.to_remove_fork_catchpoint = child_remove_fork_catchpoint; | |
856 | child_ops.to_insert_vfork_catchpoint = child_insert_vfork_catchpoint; | |
857 | child_ops.to_remove_vfork_catchpoint = child_remove_vfork_catchpoint; | |
858 | child_ops.to_has_forked = child_has_forked; | |
859 | child_ops.to_has_vforked = child_has_vforked; | |
860 | child_ops.to_can_follow_vfork_prior_to_exec = child_can_follow_vfork_prior_to_exec; | |
861 | child_ops.to_post_follow_vfork = child_post_follow_vfork; | |
862 | child_ops.to_insert_exec_catchpoint = child_insert_exec_catchpoint; | |
863 | child_ops.to_remove_exec_catchpoint = child_remove_exec_catchpoint; | |
864 | child_ops.to_has_execd = child_has_execd; | |
865 | child_ops.to_reported_exec_events_per_exec_call = child_reported_exec_events_per_exec_call; | |
866 | child_ops.to_has_syscall_event = child_has_syscall_event; | |
867 | child_ops.to_has_exited = child_has_exited; | |
868 | child_ops.to_mourn_inferior = child_mourn_inferior; | |
869 | child_ops.to_can_run = child_can_run; | |
870 | child_ops.to_thread_alive = child_thread_alive; | |
871 | child_ops.to_stop = child_stop; | |
872 | child_ops.to_enable_exception_callback = child_enable_exception_callback; | |
873 | child_ops.to_get_current_exception_event = child_get_current_exception_event; | |
874 | child_ops.to_pid_to_exec_file = child_pid_to_exec_file; | |
875 | child_ops.to_core_file_to_sym_file = child_core_file_to_sym_file; | |
876 | child_ops.to_stratum = process_stratum; | |
877 | child_ops.to_has_all_memory = 1; | |
878 | child_ops.to_has_memory = 1; | |
879 | child_ops.to_has_stack = 1; | |
880 | child_ops.to_has_registers = 1; | |
881 | child_ops.to_has_execution = 1; | |
882 | child_ops.to_magic = OPS_MAGIC; | |
883 | } | |
884 | ||
885 | void | |
886 | _initialize_inftarg () | |
887 | { | |
888 | #ifdef HAVE_OPTIONAL_PROC_FS | |
889 | char procname[32]; | |
890 | int fd; | |
891 | ||
892 | /* If we have an optional /proc filesystem (e.g. under OSF/1), | |
893 | don't add ptrace support if we can access the running GDB via /proc. */ | |
894 | #ifndef PROC_NAME_FMT | |
895 | #define PROC_NAME_FMT "/proc/%05d" | |
896 | #endif | |
897 | sprintf (procname, PROC_NAME_FMT, getpid ()); | |
898 | if ((fd = open (procname, O_RDONLY)) >= 0) | |
899 | { | |
900 | close (fd); | |
901 | return; | |
902 | } | |
903 | #endif | |
904 | ||
905 | init_child_ops (); | |
906 | add_target (&child_ops); | |
907 | } |