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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 | 36 | |
a14ed312 KB |
37 | extern struct symtab_and_line *child_enable_exception_callback (enum |
38 | exception_event_kind, | |
39 | int); | |
c906108c | 40 | |
a14ed312 KB |
41 | extern struct exception_event_record |
42 | *child_get_current_exception_event (void); | |
c906108c | 43 | |
a14ed312 | 44 | extern void _initialize_inftarg (void); |
c906108c | 45 | |
a14ed312 | 46 | static void child_prepare_to_store (void); |
c906108c SS |
47 | |
48 | #ifndef CHILD_WAIT | |
a14ed312 | 49 | static int child_wait (int, struct target_waitstatus *); |
c906108c SS |
50 | #endif /* CHILD_WAIT */ |
51 | ||
52 | #if !defined(CHILD_POST_WAIT) | |
a14ed312 | 53 | void child_post_wait (int, int); |
c906108c SS |
54 | #endif |
55 | ||
a14ed312 | 56 | static void child_open (char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void child_files_info (struct target_ops *); |
c906108c | 59 | |
a14ed312 | 60 | static void child_detach (char *, int); |
c906108c | 61 | |
a14ed312 | 62 | static void child_detach_from_process (int, char *, int, int); |
c906108c | 63 | |
a14ed312 | 64 | static void child_attach (char *, int); |
c906108c | 65 | |
a14ed312 | 66 | static void child_attach_to_process (char *, int, int); |
c906108c SS |
67 | |
68 | #if !defined(CHILD_POST_ATTACH) | |
a14ed312 | 69 | extern void child_post_attach (int); |
c906108c SS |
70 | #endif |
71 | ||
a14ed312 | 72 | static void child_require_attach (char *, int); |
c906108c | 73 | |
a14ed312 | 74 | static void child_require_detach (int, char *, int); |
c906108c | 75 | |
a14ed312 | 76 | static void ptrace_me (void); |
c906108c | 77 | |
a14ed312 | 78 | static void ptrace_him (int); |
c906108c | 79 | |
a14ed312 | 80 | static void child_create_inferior (char *, char *, char **); |
c906108c | 81 | |
a14ed312 | 82 | static void child_mourn_inferior (void); |
c906108c | 83 | |
a14ed312 | 84 | static int child_can_run (void); |
c906108c | 85 | |
a14ed312 | 86 | static void child_stop (void); |
c906108c SS |
87 | |
88 | #ifndef CHILD_THREAD_ALIVE | |
a14ed312 | 89 | int child_thread_alive (int); |
c906108c SS |
90 | #endif |
91 | ||
a14ed312 | 92 | static void init_child_ops (void); |
c906108c SS |
93 | |
94 | extern char **environ; | |
95 | ||
96 | struct target_ops child_ops; | |
97 | ||
98 | int child_suppress_run = 0; /* Non-zero if inftarg should pretend not to | |
99 | be a runnable target. Used by targets | |
100 | that can sit atop inftarg, such as HPUX | |
101 | thread support. */ | |
102 | ||
103 | #ifndef CHILD_WAIT | |
104 | ||
c5aa993b | 105 | /*## */ |
c906108c SS |
106 | /* Enable HACK for ttrace work. In |
107 | * infttrace.c/require_notification_of_events, | |
108 | * this is set to 0 so that the loop in child_wait | |
109 | * won't loop. | |
110 | */ | |
111 | int not_same_real_pid = 1; | |
c5aa993b | 112 | /*## */ |
c906108c SS |
113 | |
114 | ||
115 | /* Wait for child to do something. Return pid of child, or -1 in case | |
116 | of error; store status through argument pointer OURSTATUS. */ | |
117 | ||
118 | static int | |
119 | child_wait (pid, ourstatus) | |
120 | int pid; | |
121 | struct target_waitstatus *ourstatus; | |
122 | { | |
123 | int save_errno; | |
124 | int status; | |
7a292a7a | 125 | char *execd_pathname = NULL; |
c5aa993b JM |
126 | int exit_status; |
127 | int related_pid; | |
128 | int syscall_id; | |
129 | enum target_waitkind kind; | |
c906108c | 130 | |
c5aa993b JM |
131 | do |
132 | { | |
133 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
134 | attached process. */ | |
135 | set_sigio_trap (); | |
c906108c | 136 | |
c5aa993b | 137 | pid = ptrace_wait (inferior_pid, &status); |
c906108c | 138 | |
c5aa993b | 139 | save_errno = errno; |
c906108c | 140 | |
c5aa993b | 141 | clear_sigio_trap (); |
c906108c | 142 | |
c5aa993b | 143 | clear_sigint_trap (); |
c906108c | 144 | |
c5aa993b JM |
145 | if (pid == -1) |
146 | { | |
147 | if (save_errno == EINTR) | |
148 | continue; | |
c906108c | 149 | |
c5aa993b JM |
150 | fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", |
151 | safe_strerror (save_errno)); | |
c906108c | 152 | |
c5aa993b JM |
153 | /* Claim it exited with unknown signal. */ |
154 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
155 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
156 | return -1; | |
157 | } | |
c906108c | 158 | |
c5aa993b | 159 | /* Did it exit? |
c906108c | 160 | */ |
c5aa993b JM |
161 | if (target_has_exited (pid, status, &exit_status)) |
162 | { | |
163 | /* ??rehrauer: For now, ignore this. */ | |
164 | continue; | |
165 | } | |
166 | ||
167 | if (!target_thread_alive (pid)) | |
168 | { | |
169 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
170 | return pid; | |
171 | } | |
172 | ||
173 | if (target_has_forked (pid, &related_pid) | |
174 | && ((pid == inferior_pid) || (related_pid == inferior_pid))) | |
175 | { | |
176 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
177 | ourstatus->value.related_pid = related_pid; | |
178 | return pid; | |
179 | } | |
180 | ||
181 | if (target_has_vforked (pid, &related_pid) | |
182 | && ((pid == inferior_pid) || (related_pid == inferior_pid))) | |
183 | { | |
184 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
185 | ourstatus->value.related_pid = related_pid; | |
186 | return pid; | |
187 | } | |
188 | ||
189 | if (target_has_execd (pid, &execd_pathname)) | |
190 | { | |
191 | /* Are we ignoring initial exec events? (This is likely because | |
192 | we're in the process of starting up the inferior, and another | |
193 | (older) mechanism handles those.) If so, we'll report this | |
194 | as a regular stop, not an exec. | |
195 | */ | |
196 | if (inferior_ignoring_startup_exec_events) | |
197 | { | |
198 | inferior_ignoring_startup_exec_events--; | |
199 | } | |
200 | else | |
201 | { | |
202 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
203 | ourstatus->value.execd_pathname = execd_pathname; | |
204 | return pid; | |
205 | } | |
206 | } | |
207 | ||
208 | /* All we must do with these is communicate their occurrence | |
209 | to wait_for_inferior... | |
210 | */ | |
211 | if (target_has_syscall_event (pid, &kind, &syscall_id)) | |
212 | { | |
213 | ourstatus->kind = kind; | |
214 | ourstatus->value.syscall_id = syscall_id; | |
215 | return pid; | |
216 | } | |
217 | ||
218 | /*## } while (pid != inferior_pid); ## *//* Some other child died or stopped */ | |
c906108c | 219 | /* hack for thread testing */ |
c5aa993b JM |
220 | } |
221 | while ((pid != inferior_pid) && not_same_real_pid); | |
222 | /*## */ | |
c906108c SS |
223 | |
224 | store_waitstatus (ourstatus, status); | |
225 | return pid; | |
226 | } | |
227 | #endif /* CHILD_WAIT */ | |
228 | ||
229 | #if !defined(CHILD_POST_WAIT) | |
230 | void | |
231 | child_post_wait (pid, wait_status) | |
c5aa993b JM |
232 | int pid; |
233 | int wait_status; | |
c906108c SS |
234 | { |
235 | /* This version of Unix doesn't require a meaningful "post wait" | |
236 | operation. | |
c5aa993b | 237 | */ |
c906108c SS |
238 | } |
239 | #endif | |
c5aa993b | 240 | |
c906108c SS |
241 | |
242 | #ifndef CHILD_THREAD_ALIVE | |
243 | ||
244 | /* Check to see if the given thread is alive. | |
245 | ||
246 | FIXME: Is kill() ever the right way to do this? I doubt it, but | |
247 | for now we're going to try and be compatable with the old thread | |
248 | code. */ | |
249 | int | |
250 | child_thread_alive (pid) | |
251 | int pid; | |
252 | { | |
253 | return (kill (pid, 0) != -1); | |
254 | } | |
255 | ||
256 | #endif | |
257 | ||
258 | static void | |
259 | child_attach_to_process (args, from_tty, after_fork) | |
c5aa993b JM |
260 | char *args; |
261 | int from_tty; | |
262 | int after_fork; | |
c906108c SS |
263 | { |
264 | if (!args) | |
265 | error_no_arg ("process-id to attach"); | |
266 | ||
267 | #ifndef ATTACH_DETACH | |
268 | error ("Can't attach to a process on this machine."); | |
269 | #else | |
270 | { | |
271 | char *exec_file; | |
272 | int pid; | |
273 | char *dummy; | |
274 | ||
275 | dummy = args; | |
276 | pid = strtol (args, &dummy, 0); | |
277 | /* Some targets don't set errno on errors, grrr! */ | |
278 | if ((pid == 0) && (args == dummy)) | |
279 | error ("Illegal process-id: %s\n", args); | |
280 | ||
c5aa993b | 281 | if (pid == getpid ()) /* Trying to masturbate? */ |
c906108c SS |
282 | error ("I refuse to debug myself!"); |
283 | ||
284 | if (from_tty) | |
285 | { | |
286 | exec_file = (char *) get_exec_file (0); | |
287 | ||
288 | if (after_fork) | |
c5aa993b JM |
289 | printf_unfiltered ("Attaching after fork to %s\n", |
290 | target_pid_to_str (pid)); | |
c906108c SS |
291 | else if (exec_file) |
292 | printf_unfiltered ("Attaching to program: %s, %s\n", exec_file, | |
c5aa993b JM |
293 | target_pid_to_str (pid)); |
294 | else | |
295 | printf_unfiltered ("Attaching to %s\n", target_pid_to_str (pid)); | |
c906108c SS |
296 | |
297 | gdb_flush (gdb_stdout); | |
298 | } | |
299 | ||
300 | if (!after_fork) | |
301 | attach (pid); | |
302 | else | |
303 | REQUIRE_ATTACH (pid); | |
304 | ||
305 | inferior_pid = pid; | |
306 | push_target (&child_ops); | |
307 | } | |
c5aa993b | 308 | #endif /* ATTACH_DETACH */ |
c906108c SS |
309 | } |
310 | ||
311 | ||
312 | /* Attach to process PID, then initialize for debugging it. */ | |
313 | ||
314 | static void | |
315 | child_attach (args, from_tty) | |
316 | char *args; | |
317 | int from_tty; | |
318 | { | |
319 | child_attach_to_process (args, from_tty, 0); | |
320 | } | |
321 | ||
322 | #if !defined(CHILD_POST_ATTACH) | |
323 | void | |
324 | child_post_attach (pid) | |
c5aa993b | 325 | int pid; |
c906108c SS |
326 | { |
327 | /* This version of Unix doesn't require a meaningful "post attach" | |
328 | operation by a debugger. */ | |
329 | } | |
330 | #endif | |
331 | ||
332 | static void | |
333 | child_require_attach (args, from_tty) | |
334 | char *args; | |
335 | int from_tty; | |
336 | { | |
337 | child_attach_to_process (args, from_tty, 1); | |
c5aa993b | 338 | } |
c906108c SS |
339 | |
340 | static void | |
341 | child_detach_from_process (pid, args, from_tty, after_fork) | |
c5aa993b JM |
342 | int pid; |
343 | char *args; | |
344 | int from_tty; | |
345 | int after_fork; | |
c906108c SS |
346 | { |
347 | #ifdef ATTACH_DETACH | |
348 | { | |
349 | int siggnal = 0; | |
350 | ||
351 | if (from_tty) | |
352 | { | |
353 | char *exec_file = get_exec_file (0); | |
354 | if (exec_file == 0) | |
355 | exec_file = ""; | |
c5aa993b JM |
356 | if (after_fork) |
357 | printf_unfiltered ("Detaching after fork from %s\n", | |
358 | target_pid_to_str (pid)); | |
359 | else | |
c906108c | 360 | printf_unfiltered ("Detaching from program: %s, %s\n", exec_file, |
c5aa993b | 361 | target_pid_to_str (pid)); |
c906108c SS |
362 | gdb_flush (gdb_stdout); |
363 | } | |
364 | if (args) | |
365 | siggnal = atoi (args); | |
366 | ||
367 | if (!after_fork) | |
368 | detach (siggnal); | |
369 | else | |
370 | REQUIRE_DETACH (pid, siggnal); | |
371 | } | |
372 | #else | |
373 | error ("This version of Unix does not support detaching a process."); | |
374 | #endif | |
375 | } | |
376 | ||
377 | /* Take a program previously attached to and detaches it. | |
378 | The program resumes execution and will no longer stop | |
379 | on signals, etc. We'd better not have left any breakpoints | |
380 | in the program or it'll die when it hits one. For this | |
381 | to work, it may be necessary for the process to have been | |
382 | previously attached. It *might* work if the program was | |
383 | started via the normal ptrace (PTRACE_TRACEME). */ | |
384 | ||
385 | static void | |
386 | child_detach (args, from_tty) | |
387 | char *args; | |
388 | int from_tty; | |
389 | { | |
390 | child_detach_from_process (inferior_pid, args, from_tty, 0); | |
391 | inferior_pid = 0; | |
392 | unpush_target (&child_ops); | |
393 | } | |
394 | ||
395 | static void | |
396 | child_require_detach (pid, args, from_tty) | |
c5aa993b JM |
397 | int pid; |
398 | char *args; | |
399 | int from_tty; | |
c906108c SS |
400 | { |
401 | child_detach_from_process (pid, args, from_tty, 1); | |
402 | } | |
403 | ||
404 | ||
405 | /* Get ready to modify the registers array. On machines which store | |
406 | individual registers, this doesn't need to do anything. On machines | |
407 | which store all the registers in one fell swoop, this makes sure | |
408 | that registers contains all the registers from the program being | |
409 | debugged. */ | |
410 | ||
411 | static void | |
412 | child_prepare_to_store () | |
413 | { | |
414 | #ifdef CHILD_PREPARE_TO_STORE | |
415 | CHILD_PREPARE_TO_STORE (); | |
416 | #endif | |
417 | } | |
418 | ||
419 | /* Print status information about what we're accessing. */ | |
420 | ||
421 | static void | |
422 | child_files_info (ignore) | |
423 | struct target_ops *ignore; | |
424 | { | |
425 | printf_unfiltered ("\tUsing the running image of %s %s.\n", | |
c5aa993b | 426 | attach_flag ? "attached" : "child", target_pid_to_str (inferior_pid)); |
c906108c SS |
427 | } |
428 | ||
429 | /* ARGSUSED */ | |
430 | static void | |
431 | child_open (arg, from_tty) | |
432 | char *arg; | |
433 | int from_tty; | |
434 | { | |
435 | error ("Use the \"run\" command to start a Unix child process."); | |
436 | } | |
437 | ||
438 | /* Stub function which causes the inferior that runs it, to be ptrace-able | |
439 | by its parent process. */ | |
440 | ||
441 | static void | |
442 | ptrace_me () | |
443 | { | |
444 | /* "Trace me, Dr. Memory!" */ | |
445 | call_ptrace (0, 0, (PTRACE_ARG3_TYPE) 0, 0); | |
446 | } | |
447 | ||
448 | /* Stub function which causes the GDB that runs it, to start ptrace-ing | |
449 | the child process. */ | |
450 | ||
c5aa993b | 451 | static void |
c906108c SS |
452 | ptrace_him (pid) |
453 | int pid; | |
454 | { | |
455 | push_target (&child_ops); | |
456 | ||
457 | /* On some targets, there must be some explicit synchronization | |
458 | between the parent and child processes after the debugger | |
459 | forks, and before the child execs the debuggee program. This | |
460 | call basically gives permission for the child to exec. | |
c5aa993b | 461 | */ |
c906108c SS |
462 | |
463 | target_acknowledge_created_inferior (pid); | |
464 | ||
465 | /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, | |
466 | * and will be 1 or 2 depending on whether we're starting | |
467 | * without or with a shell. | |
468 | */ | |
469 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); | |
470 | ||
471 | /* On some targets, there must be some explicit actions taken after | |
472 | the inferior has been started up. | |
c5aa993b | 473 | */ |
c906108c SS |
474 | target_post_startup_inferior (pid); |
475 | } | |
476 | ||
477 | /* Start an inferior Unix child process and sets inferior_pid to its pid. | |
478 | EXEC_FILE is the file to run. | |
479 | ALLARGS is a string containing the arguments to the program. | |
480 | ENV is the environment vector to pass. Errors reported with error(). */ | |
481 | ||
482 | static void | |
483 | child_create_inferior (exec_file, allargs, env) | |
484 | char *exec_file; | |
485 | char *allargs; | |
486 | char **env; | |
487 | { | |
c906108c | 488 | #ifdef HPUXHPPA |
c906108c SS |
489 | fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, pre_fork_inferior, NULL); |
490 | #else | |
c5aa993b | 491 | fork_inferior (exec_file, allargs, env, ptrace_me, ptrace_him, NULL, NULL); |
c906108c SS |
492 | #endif |
493 | /* We are at the first instruction we care about. */ | |
494 | /* Pedal to the metal... */ | |
2acceee2 | 495 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0); |
c906108c SS |
496 | } |
497 | ||
498 | #if !defined(CHILD_POST_STARTUP_INFERIOR) | |
499 | void | |
500 | child_post_startup_inferior (pid) | |
c5aa993b | 501 | int pid; |
c906108c SS |
502 | { |
503 | /* This version of Unix doesn't require a meaningful "post startup inferior" | |
504 | operation by a debugger. | |
c5aa993b | 505 | */ |
c906108c SS |
506 | } |
507 | #endif | |
508 | ||
509 | #if !defined(CHILD_ACKNOWLEDGE_CREATED_INFERIOR) | |
510 | void | |
511 | child_acknowledge_created_inferior (pid) | |
c5aa993b | 512 | int pid; |
c906108c SS |
513 | { |
514 | /* This version of Unix doesn't require a meaningful "acknowledge created inferior" | |
515 | operation by a debugger. | |
c5aa993b | 516 | */ |
c906108c SS |
517 | } |
518 | #endif | |
519 | ||
520 | ||
521 | void | |
522 | child_clone_and_follow_inferior (child_pid, followed_child) | |
c5aa993b JM |
523 | int child_pid; |
524 | int *followed_child; | |
c906108c SS |
525 | { |
526 | clone_and_follow_inferior (child_pid, followed_child); | |
527 | ||
528 | /* Don't resume CHILD_PID; it's stopped where it ought to be, until | |
529 | the decision gets made elsewhere how to continue it. | |
c5aa993b | 530 | */ |
c906108c SS |
531 | } |
532 | ||
533 | ||
534 | #if !defined(CHILD_POST_FOLLOW_INFERIOR_BY_CLONE) | |
535 | void | |
536 | child_post_follow_inferior_by_clone () | |
537 | { | |
538 | /* This version of Unix doesn't require a meaningful "post follow inferior" | |
539 | operation by a clone debugger. | |
c5aa993b | 540 | */ |
c906108c SS |
541 | } |
542 | #endif | |
543 | ||
544 | #if !defined(CHILD_INSERT_FORK_CATCHPOINT) | |
545 | int | |
546 | child_insert_fork_catchpoint (pid) | |
547 | int pid; | |
548 | { | |
549 | /* This version of Unix doesn't support notification of fork events. */ | |
550 | return 0; | |
551 | } | |
552 | #endif | |
553 | ||
554 | #if !defined(CHILD_REMOVE_FORK_CATCHPOINT) | |
555 | int | |
556 | child_remove_fork_catchpoint (pid) | |
557 | int pid; | |
558 | { | |
559 | /* This version of Unix doesn't support notification of fork events. */ | |
560 | return 0; | |
561 | } | |
562 | #endif | |
563 | ||
564 | #if !defined(CHILD_INSERT_VFORK_CATCHPOINT) | |
565 | int | |
566 | child_insert_vfork_catchpoint (pid) | |
567 | int pid; | |
568 | { | |
569 | /* This version of Unix doesn't support notification of vfork events. */ | |
570 | return 0; | |
571 | } | |
572 | #endif | |
573 | ||
574 | #if !defined(CHILD_REMOVE_VFORK_CATCHPOINT) | |
575 | int | |
576 | child_remove_vfork_catchpoint (pid) | |
577 | int pid; | |
578 | { | |
579 | /* This version of Unix doesn't support notification of vfork events. */ | |
580 | return 0; | |
581 | } | |
582 | #endif | |
583 | ||
584 | #if !defined(CHILD_HAS_FORKED) | |
585 | int | |
586 | child_has_forked (pid, child_pid) | |
587 | int pid; | |
588 | int *child_pid; | |
589 | { | |
590 | /* This version of Unix doesn't support notification of fork events. */ | |
591 | return 0; | |
592 | } | |
593 | #endif | |
594 | ||
595 | ||
596 | #if !defined(CHILD_HAS_VFORKED) | |
597 | int | |
598 | child_has_vforked (pid, child_pid) | |
c5aa993b JM |
599 | int pid; |
600 | int *child_pid; | |
c906108c SS |
601 | { |
602 | /* This version of Unix doesn't support notification of vfork events. | |
c5aa993b | 603 | */ |
c906108c SS |
604 | return 0; |
605 | } | |
606 | #endif | |
607 | ||
608 | ||
609 | #if !defined(CHILD_CAN_FOLLOW_VFORK_PRIOR_TO_EXEC) | |
610 | int | |
611 | child_can_follow_vfork_prior_to_exec () | |
612 | { | |
613 | /* This version of Unix doesn't support notification of vfork events. | |
614 | However, if it did, it probably wouldn't allow vforks to be followed | |
615 | before the following exec. | |
c5aa993b | 616 | */ |
c906108c SS |
617 | return 0; |
618 | } | |
619 | #endif | |
620 | ||
621 | ||
622 | #if !defined(CHILD_POST_FOLLOW_VFORK) | |
623 | void | |
624 | child_post_follow_vfork (parent_pid, followed_parent, child_pid, followed_child) | |
c5aa993b JM |
625 | int parent_pid; |
626 | int followed_parent; | |
627 | int child_pid; | |
628 | int followed_child; | |
c906108c SS |
629 | { |
630 | /* This version of Unix doesn't require a meaningful "post follow vfork" | |
631 | operation by a clone debugger. | |
c5aa993b | 632 | */ |
c906108c SS |
633 | } |
634 | #endif | |
635 | ||
636 | #if !defined(CHILD_INSERT_EXEC_CATCHPOINT) | |
637 | int | |
638 | child_insert_exec_catchpoint (pid) | |
639 | int pid; | |
640 | { | |
641 | /* This version of Unix doesn't support notification of exec events. */ | |
642 | return 0; | |
643 | } | |
644 | #endif | |
645 | ||
646 | #if !defined(CHILD_REMOVE_EXEC_CATCHPOINT) | |
647 | int | |
648 | child_remove_exec_catchpoint (pid) | |
649 | int pid; | |
650 | { | |
651 | /* This version of Unix doesn't support notification of exec events. */ | |
652 | return 0; | |
653 | } | |
654 | #endif | |
655 | ||
656 | #if !defined(CHILD_HAS_EXECD) | |
657 | int | |
658 | child_has_execd (pid, execd_pathname) | |
c5aa993b JM |
659 | int pid; |
660 | char **execd_pathname; | |
c906108c SS |
661 | { |
662 | /* This version of Unix doesn't support notification of exec events. | |
c5aa993b | 663 | */ |
c906108c SS |
664 | return 0; |
665 | } | |
666 | #endif | |
667 | ||
668 | ||
669 | #if !defined(CHILD_REPORTED_EXEC_EVENTS_PER_EXEC_CALL) | |
670 | int | |
671 | child_reported_exec_events_per_exec_call () | |
672 | { | |
673 | /* This version of Unix doesn't support notification of exec events. | |
c5aa993b | 674 | */ |
c906108c SS |
675 | return 1; |
676 | } | |
677 | #endif | |
678 | ||
679 | ||
680 | #if !defined(CHILD_HAS_SYSCALL_EVENT) | |
681 | int | |
682 | child_has_syscall_event (pid, kind, syscall_id) | |
c5aa993b JM |
683 | int pid; |
684 | enum target_waitkind *kind; | |
685 | int *syscall_id; | |
c906108c SS |
686 | { |
687 | /* This version of Unix doesn't support notification of syscall events. | |
c5aa993b | 688 | */ |
c906108c SS |
689 | return 0; |
690 | } | |
691 | #endif | |
692 | ||
693 | ||
694 | #if !defined(CHILD_HAS_EXITED) | |
695 | int | |
696 | child_has_exited (pid, wait_status, exit_status) | |
c5aa993b JM |
697 | int pid; |
698 | int wait_status; | |
699 | int *exit_status; | |
c906108c SS |
700 | { |
701 | if (WIFEXITED (wait_status)) | |
702 | { | |
703 | *exit_status = WEXITSTATUS (wait_status); | |
704 | return 1; | |
705 | } | |
706 | ||
707 | if (WIFSIGNALED (wait_status)) | |
708 | { | |
c5aa993b | 709 | *exit_status = 0; /* ?? Don't know what else to say here. */ |
c906108c SS |
710 | return 1; |
711 | } | |
712 | ||
713 | /* ?? Do we really need to consult the event state, too? Assume the | |
c5aa993b | 714 | wait_state alone suffices. |
c906108c SS |
715 | */ |
716 | return 0; | |
717 | } | |
718 | #endif | |
719 | ||
720 | ||
721 | static void | |
722 | child_mourn_inferior () | |
723 | { | |
c906108c | 724 | unpush_target (&child_ops); |
c906108c SS |
725 | generic_mourn_inferior (); |
726 | } | |
727 | ||
728 | static int | |
729 | child_can_run () | |
730 | { | |
731 | /* This variable is controlled by modules that sit atop inftarg that may layer | |
732 | their own process structure atop that provided here. hpux-thread.c does | |
733 | this because of the Hpux user-mode level thread model. */ | |
734 | ||
735 | return !child_suppress_run; | |
736 | } | |
737 | ||
738 | /* Send a SIGINT to the process group. This acts just like the user typed a | |
739 | ^C on the controlling terminal. | |
740 | ||
741 | XXX - This may not be correct for all systems. Some may want to use | |
742 | killpg() instead of kill (-pgrp). */ | |
743 | ||
744 | static void | |
745 | child_stop () | |
746 | { | |
747 | extern pid_t inferior_process_group; | |
748 | ||
749 | kill (-inferior_process_group, SIGINT); | |
750 | } | |
751 | ||
752 | #if !defined(CHILD_ENABLE_EXCEPTION_CALLBACK) | |
753 | struct symtab_and_line * | |
754 | child_enable_exception_callback (kind, enable) | |
c5aa993b JM |
755 | enum exception_event_kind kind; |
756 | int enable; | |
c906108c SS |
757 | { |
758 | return (struct symtab_and_line *) NULL; | |
759 | } | |
760 | #endif | |
761 | ||
762 | #if !defined(CHILD_GET_CURRENT_EXCEPTION_EVENT) | |
763 | struct exception_event_record * | |
764 | child_get_current_exception_event () | |
765 | { | |
766 | return (struct exception_event_record *) NULL; | |
767 | } | |
768 | #endif | |
769 | ||
770 | ||
771 | #if !defined(CHILD_PID_TO_EXEC_FILE) | |
772 | char * | |
773 | child_pid_to_exec_file (pid) | |
c5aa993b | 774 | int pid; |
c906108c SS |
775 | { |
776 | /* This version of Unix doesn't support translation of a process ID | |
777 | to the filename of the executable file. | |
c5aa993b | 778 | */ |
c906108c SS |
779 | return NULL; |
780 | } | |
781 | #endif | |
782 | ||
783 | char * | |
784 | child_core_file_to_sym_file (core) | |
c5aa993b | 785 | char *core; |
c906108c SS |
786 | { |
787 | /* The target stratum for a running executable need not support | |
788 | this operation. | |
c5aa993b | 789 | */ |
c906108c SS |
790 | return NULL; |
791 | } | |
c5aa993b | 792 | \f |
c906108c | 793 | |
ed9a39eb JM |
794 | #if !defined(CHILD_PID_TO_STR) |
795 | char * | |
796 | child_pid_to_str (pid) | |
797 | int pid; | |
798 | { | |
799 | return normal_pid_to_str (pid); | |
800 | } | |
801 | #endif | |
c906108c | 802 | |
c906108c SS |
803 | static void |
804 | init_child_ops () | |
805 | { | |
806 | child_ops.to_shortname = "child"; | |
807 | child_ops.to_longname = "Unix child process"; | |
808 | child_ops.to_doc = "Unix child process (started by the \"run\" command)."; | |
809 | child_ops.to_open = child_open; | |
810 | child_ops.to_attach = child_attach; | |
811 | child_ops.to_post_attach = child_post_attach; | |
812 | child_ops.to_require_attach = child_require_attach; | |
813 | child_ops.to_detach = child_detach; | |
814 | child_ops.to_require_detach = child_require_detach; | |
815 | child_ops.to_resume = child_resume; | |
816 | child_ops.to_wait = child_wait; | |
817 | child_ops.to_post_wait = child_post_wait; | |
818 | child_ops.to_fetch_registers = fetch_inferior_registers; | |
819 | child_ops.to_store_registers = store_inferior_registers; | |
820 | child_ops.to_prepare_to_store = child_prepare_to_store; | |
821 | child_ops.to_xfer_memory = child_xfer_memory; | |
822 | child_ops.to_files_info = child_files_info; | |
823 | child_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
824 | child_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
825 | child_ops.to_terminal_init = terminal_init_inferior; | |
826 | child_ops.to_terminal_inferior = terminal_inferior; | |
827 | child_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
828 | child_ops.to_terminal_ours = terminal_ours; | |
829 | child_ops.to_terminal_info = child_terminal_info; | |
830 | child_ops.to_kill = kill_inferior; | |
831 | child_ops.to_create_inferior = child_create_inferior; | |
832 | child_ops.to_post_startup_inferior = child_post_startup_inferior; | |
833 | child_ops.to_acknowledge_created_inferior = child_acknowledge_created_inferior; | |
834 | child_ops.to_clone_and_follow_inferior = child_clone_and_follow_inferior; | |
835 | child_ops.to_post_follow_inferior_by_clone = child_post_follow_inferior_by_clone; | |
836 | child_ops.to_insert_fork_catchpoint = child_insert_fork_catchpoint; | |
837 | child_ops.to_remove_fork_catchpoint = child_remove_fork_catchpoint; | |
838 | child_ops.to_insert_vfork_catchpoint = child_insert_vfork_catchpoint; | |
839 | child_ops.to_remove_vfork_catchpoint = child_remove_vfork_catchpoint; | |
840 | child_ops.to_has_forked = child_has_forked; | |
841 | child_ops.to_has_vforked = child_has_vforked; | |
842 | child_ops.to_can_follow_vfork_prior_to_exec = child_can_follow_vfork_prior_to_exec; | |
843 | child_ops.to_post_follow_vfork = child_post_follow_vfork; | |
844 | child_ops.to_insert_exec_catchpoint = child_insert_exec_catchpoint; | |
845 | child_ops.to_remove_exec_catchpoint = child_remove_exec_catchpoint; | |
846 | child_ops.to_has_execd = child_has_execd; | |
847 | child_ops.to_reported_exec_events_per_exec_call = child_reported_exec_events_per_exec_call; | |
848 | child_ops.to_has_syscall_event = child_has_syscall_event; | |
849 | child_ops.to_has_exited = child_has_exited; | |
850 | child_ops.to_mourn_inferior = child_mourn_inferior; | |
851 | child_ops.to_can_run = child_can_run; | |
852 | child_ops.to_thread_alive = child_thread_alive; | |
ed9a39eb | 853 | child_ops.to_pid_to_str = child_pid_to_str; |
c906108c SS |
854 | child_ops.to_stop = child_stop; |
855 | child_ops.to_enable_exception_callback = child_enable_exception_callback; | |
856 | child_ops.to_get_current_exception_event = child_get_current_exception_event; | |
857 | child_ops.to_pid_to_exec_file = child_pid_to_exec_file; | |
858 | child_ops.to_core_file_to_sym_file = child_core_file_to_sym_file; | |
859 | child_ops.to_stratum = process_stratum; | |
860 | child_ops.to_has_all_memory = 1; | |
861 | child_ops.to_has_memory = 1; | |
862 | child_ops.to_has_stack = 1; | |
863 | child_ops.to_has_registers = 1; | |
864 | child_ops.to_has_execution = 1; | |
865 | child_ops.to_magic = OPS_MAGIC; | |
866 | } | |
867 | ||
868 | void | |
869 | _initialize_inftarg () | |
870 | { | |
871 | #ifdef HAVE_OPTIONAL_PROC_FS | |
872 | char procname[32]; | |
873 | int fd; | |
874 | ||
875 | /* If we have an optional /proc filesystem (e.g. under OSF/1), | |
876 | don't add ptrace support if we can access the running GDB via /proc. */ | |
877 | #ifndef PROC_NAME_FMT | |
878 | #define PROC_NAME_FMT "/proc/%05d" | |
879 | #endif | |
880 | sprintf (procname, PROC_NAME_FMT, getpid ()); | |
881 | if ((fd = open (procname, O_RDONLY)) >= 0) | |
882 | { | |
883 | close (fd); | |
884 | return; | |
885 | } | |
886 | #endif | |
887 | ||
888 | init_child_ops (); | |
889 | add_target (&child_ops); | |
890 | } |