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578c1c03 MK |
1 | /* Native-dependent code for FreeBSD. |
2 | ||
61baf725 | 3 | Copyright (C) 2002-2017 Free Software Foundation, Inc. |
578c1c03 MK |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
578c1c03 MK |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
578c1c03 MK |
19 | |
20 | #include "defs.h" | |
21 | #include "gdbcore.h" | |
22 | #include "inferior.h" | |
23 | #include "regcache.h" | |
24 | #include "regset.h" | |
6e9567fe | 25 | #include "gdbcmd.h" |
2020b7ab | 26 | #include "gdbthread.h" |
cea6e4f1 | 27 | #include "gdb_wait.h" |
578c1c03 | 28 | #include <sys/types.h> |
68b9939a | 29 | #include <sys/procfs.h> |
e58e05d6 | 30 | #include <sys/ptrace.h> |
68b9939a | 31 | #include <sys/sysctl.h> |
25268153 JB |
32 | #ifdef HAVE_KINFO_GETVMMAP |
33 | #include <sys/user.h> | |
34 | #include <libutil.h> | |
35 | #endif | |
578c1c03 MK |
36 | |
37 | #include "elf-bfd.h" | |
38 | #include "fbsd-nat.h" | |
39 | ||
766062f6 | 40 | /* Return the name of a file that can be opened to get the symbols for |
578c1c03 MK |
41 | the child process identified by PID. */ |
42 | ||
8f60fe01 | 43 | static char * |
8dd27370 | 44 | fbsd_pid_to_exec_file (struct target_ops *self, int pid) |
578c1c03 | 45 | { |
f2feec98 | 46 | ssize_t len; |
b4ab256d HZ |
47 | static char buf[PATH_MAX]; |
48 | char name[PATH_MAX]; | |
578c1c03 | 49 | |
68b9939a | 50 | #ifdef KERN_PROC_PATHNAME |
f2feec98 | 51 | size_t buflen; |
68b9939a | 52 | int mib[4]; |
578c1c03 | 53 | |
68b9939a MK |
54 | mib[0] = CTL_KERN; |
55 | mib[1] = KERN_PROC; | |
56 | mib[2] = KERN_PROC_PATHNAME; | |
57 | mib[3] = pid; | |
f2feec98 JB |
58 | buflen = sizeof buf; |
59 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
578c1c03 | 60 | return buf; |
68b9939a | 61 | #endif |
578c1c03 | 62 | |
b4ab256d HZ |
63 | xsnprintf (name, PATH_MAX, "/proc/%d/exe", pid); |
64 | len = readlink (name, buf, PATH_MAX - 1); | |
65 | if (len != -1) | |
68b9939a | 66 | { |
b4ab256d HZ |
67 | buf[len] = '\0'; |
68 | return buf; | |
68b9939a MK |
69 | } |
70 | ||
b4ab256d | 71 | return NULL; |
578c1c03 MK |
72 | } |
73 | ||
25268153 JB |
74 | #ifdef HAVE_KINFO_GETVMMAP |
75 | /* Iterate over all the memory regions in the current inferior, | |
76 | calling FUNC for each memory region. OBFD is passed as the last | |
77 | argument to FUNC. */ | |
78 | ||
8f60fe01 | 79 | static int |
25268153 JB |
80 | fbsd_find_memory_regions (struct target_ops *self, |
81 | find_memory_region_ftype func, void *obfd) | |
82 | { | |
83 | pid_t pid = ptid_get_pid (inferior_ptid); | |
84 | struct kinfo_vmentry *vmentl, *kve; | |
85 | uint64_t size; | |
86 | struct cleanup *cleanup; | |
87 | int i, nitems; | |
88 | ||
89 | vmentl = kinfo_getvmmap (pid, &nitems); | |
90 | if (vmentl == NULL) | |
91 | perror_with_name (_("Couldn't fetch VM map entries.")); | |
92 | cleanup = make_cleanup (free, vmentl); | |
93 | ||
94 | for (i = 0; i < nitems; i++) | |
95 | { | |
96 | kve = &vmentl[i]; | |
97 | ||
98 | /* Skip unreadable segments and those where MAP_NOCORE has been set. */ | |
99 | if (!(kve->kve_protection & KVME_PROT_READ) | |
100 | || kve->kve_flags & KVME_FLAG_NOCOREDUMP) | |
101 | continue; | |
102 | ||
103 | /* Skip segments with an invalid type. */ | |
104 | if (kve->kve_type != KVME_TYPE_DEFAULT | |
105 | && kve->kve_type != KVME_TYPE_VNODE | |
106 | && kve->kve_type != KVME_TYPE_SWAP | |
107 | && kve->kve_type != KVME_TYPE_PHYS) | |
108 | continue; | |
109 | ||
110 | size = kve->kve_end - kve->kve_start; | |
111 | if (info_verbose) | |
112 | { | |
113 | fprintf_filtered (gdb_stdout, | |
114 | "Save segment, %ld bytes at %s (%c%c%c)\n", | |
115 | (long) size, | |
116 | paddress (target_gdbarch (), kve->kve_start), | |
117 | kve->kve_protection & KVME_PROT_READ ? 'r' : '-', | |
118 | kve->kve_protection & KVME_PROT_WRITE ? 'w' : '-', | |
119 | kve->kve_protection & KVME_PROT_EXEC ? 'x' : '-'); | |
120 | } | |
121 | ||
122 | /* Invoke the callback function to create the corefile segment. | |
123 | Pass MODIFIED as true, we do not know the real modification state. */ | |
124 | func (kve->kve_start, size, kve->kve_protection & KVME_PROT_READ, | |
125 | kve->kve_protection & KVME_PROT_WRITE, | |
126 | kve->kve_protection & KVME_PROT_EXEC, 1, obfd); | |
127 | } | |
128 | do_cleanups (cleanup); | |
129 | return 0; | |
130 | } | |
131 | #else | |
578c1c03 MK |
132 | static int |
133 | fbsd_read_mapping (FILE *mapfile, unsigned long *start, unsigned long *end, | |
134 | char *protection) | |
135 | { | |
136 | /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */ | |
137 | char buf[256]; | |
138 | int resident, privateresident; | |
139 | unsigned long obj; | |
140 | int ret = EOF; | |
141 | ||
142 | /* As of FreeBSD 5.0-RELEASE, the layout is described in | |
143 | /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a | |
144 | new column was added to the procfs map. Therefore we can't use | |
145 | fscanf since we need to support older releases too. */ | |
146 | if (fgets (buf, sizeof buf, mapfile) != NULL) | |
147 | ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end, | |
148 | &resident, &privateresident, &obj, protection); | |
149 | ||
150 | return (ret != 0 && ret != EOF); | |
151 | } | |
152 | ||
153 | /* Iterate over all the memory regions in the current inferior, | |
154 | calling FUNC for each memory region. OBFD is passed as the last | |
155 | argument to FUNC. */ | |
156 | ||
8f60fe01 | 157 | static int |
2e73927c TT |
158 | fbsd_find_memory_regions (struct target_ops *self, |
159 | find_memory_region_ftype func, void *obfd) | |
578c1c03 MK |
160 | { |
161 | pid_t pid = ptid_get_pid (inferior_ptid); | |
162 | char *mapfilename; | |
163 | FILE *mapfile; | |
164 | unsigned long start, end, size; | |
165 | char protection[4]; | |
166 | int read, write, exec; | |
7c8a8b04 | 167 | struct cleanup *cleanup; |
578c1c03 MK |
168 | |
169 | mapfilename = xstrprintf ("/proc/%ld/map", (long) pid); | |
7c8a8b04 | 170 | cleanup = make_cleanup (xfree, mapfilename); |
578c1c03 MK |
171 | mapfile = fopen (mapfilename, "r"); |
172 | if (mapfile == NULL) | |
8a3fe4f8 | 173 | error (_("Couldn't open %s."), mapfilename); |
7c8a8b04 | 174 | make_cleanup_fclose (mapfile); |
578c1c03 MK |
175 | |
176 | if (info_verbose) | |
177 | fprintf_filtered (gdb_stdout, | |
178 | "Reading memory regions from %s\n", mapfilename); | |
179 | ||
180 | /* Now iterate until end-of-file. */ | |
181 | while (fbsd_read_mapping (mapfile, &start, &end, &protection[0])) | |
182 | { | |
183 | size = end - start; | |
184 | ||
185 | read = (strchr (protection, 'r') != 0); | |
186 | write = (strchr (protection, 'w') != 0); | |
187 | exec = (strchr (protection, 'x') != 0); | |
188 | ||
189 | if (info_verbose) | |
190 | { | |
191 | fprintf_filtered (gdb_stdout, | |
5af949e3 | 192 | "Save segment, %ld bytes at %s (%c%c%c)\n", |
f5656ead | 193 | size, paddress (target_gdbarch (), start), |
578c1c03 MK |
194 | read ? 'r' : '-', |
195 | write ? 'w' : '-', | |
196 | exec ? 'x' : '-'); | |
197 | } | |
198 | ||
4f69f4c2 JK |
199 | /* Invoke the callback function to create the corefile segment. |
200 | Pass MODIFIED as true, we do not know the real modification state. */ | |
201 | func (start, size, read, write, exec, 1, obfd); | |
578c1c03 MK |
202 | } |
203 | ||
7c8a8b04 | 204 | do_cleanups (cleanup); |
578c1c03 MK |
205 | return 0; |
206 | } | |
25268153 | 207 | #endif |
8f60fe01 | 208 | |
7697fc9e JB |
209 | #ifdef KERN_PROC_AUXV |
210 | static enum target_xfer_status (*super_xfer_partial) (struct target_ops *ops, | |
211 | enum target_object object, | |
212 | const char *annex, | |
213 | gdb_byte *readbuf, | |
214 | const gdb_byte *writebuf, | |
215 | ULONGEST offset, | |
216 | ULONGEST len, | |
217 | ULONGEST *xfered_len); | |
218 | ||
219 | /* Implement the "to_xfer_partial target_ops" method. */ | |
220 | ||
221 | static enum target_xfer_status | |
222 | fbsd_xfer_partial (struct target_ops *ops, enum target_object object, | |
223 | const char *annex, gdb_byte *readbuf, | |
224 | const gdb_byte *writebuf, | |
225 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
226 | { | |
227 | pid_t pid = ptid_get_pid (inferior_ptid); | |
228 | ||
229 | switch (object) | |
230 | { | |
231 | case TARGET_OBJECT_AUXV: | |
232 | { | |
233 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); | |
234 | unsigned char *buf; | |
235 | size_t buflen; | |
236 | int mib[4]; | |
237 | ||
238 | if (writebuf != NULL) | |
239 | return TARGET_XFER_E_IO; | |
240 | mib[0] = CTL_KERN; | |
241 | mib[1] = KERN_PROC; | |
242 | mib[2] = KERN_PROC_AUXV; | |
243 | mib[3] = pid; | |
244 | if (offset == 0) | |
245 | { | |
246 | buf = readbuf; | |
247 | buflen = len; | |
248 | } | |
249 | else | |
250 | { | |
251 | buflen = offset + len; | |
252 | buf = XCNEWVEC (unsigned char, buflen); | |
253 | cleanup = make_cleanup (xfree, buf); | |
254 | } | |
255 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
256 | { | |
257 | if (offset != 0) | |
258 | { | |
259 | if (buflen > offset) | |
260 | { | |
261 | buflen -= offset; | |
262 | memcpy (readbuf, buf + offset, buflen); | |
263 | } | |
264 | else | |
265 | buflen = 0; | |
266 | } | |
267 | do_cleanups (cleanup); | |
268 | *xfered_len = buflen; | |
269 | return (buflen == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
270 | } | |
271 | do_cleanups (cleanup); | |
272 | return TARGET_XFER_E_IO; | |
273 | } | |
274 | default: | |
275 | return super_xfer_partial (ops, object, annex, readbuf, writebuf, offset, | |
276 | len, xfered_len); | |
277 | } | |
278 | } | |
279 | #endif | |
280 | ||
e58e05d6 | 281 | #ifdef PT_LWPINFO |
6e9567fe JB |
282 | static int debug_fbsd_lwp; |
283 | ||
8607ea63 JB |
284 | static void (*super_resume) (struct target_ops *, |
285 | ptid_t, | |
286 | int, | |
287 | enum gdb_signal); | |
e58e05d6 JB |
288 | static ptid_t (*super_wait) (struct target_ops *, |
289 | ptid_t, | |
290 | struct target_waitstatus *, | |
291 | int); | |
292 | ||
6e9567fe JB |
293 | static void |
294 | show_fbsd_lwp_debug (struct ui_file *file, int from_tty, | |
295 | struct cmd_list_element *c, const char *value) | |
296 | { | |
297 | fprintf_filtered (file, _("Debugging of FreeBSD lwp module is %s.\n"), value); | |
298 | } | |
299 | ||
300 | #if defined(TDP_RFPPWAIT) || defined(HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME) | |
301 | /* Fetch the external variant of the kernel's internal process | |
302 | structure for the process PID into KP. */ | |
303 | ||
304 | static void | |
305 | fbsd_fetch_kinfo_proc (pid_t pid, struct kinfo_proc *kp) | |
306 | { | |
307 | size_t len; | |
308 | int mib[4]; | |
309 | ||
310 | len = sizeof *kp; | |
311 | mib[0] = CTL_KERN; | |
312 | mib[1] = KERN_PROC; | |
313 | mib[2] = KERN_PROC_PID; | |
314 | mib[3] = pid; | |
315 | if (sysctl (mib, 4, kp, &len, NULL, 0) == -1) | |
316 | perror_with_name (("sysctl")); | |
317 | } | |
318 | #endif | |
319 | ||
320 | /* | |
321 | FreeBSD's first thread support was via a "reentrant" version of libc | |
322 | (libc_r) that first shipped in 2.2.7. This library multiplexed all | |
323 | of the threads in a process onto a single kernel thread. This | |
4c7bf4f9 | 324 | library was supported via the bsd-uthread target. |
6e9567fe JB |
325 | |
326 | FreeBSD 5.1 introduced two new threading libraries that made use of | |
327 | multiple kernel threads. The first (libkse) scheduled M user | |
328 | threads onto N (<= M) kernel threads (LWPs). The second (libthr) | |
329 | bound each user thread to a dedicated kernel thread. libkse shipped | |
330 | as the default threading library (libpthread). | |
331 | ||
332 | FreeBSD 5.3 added a libthread_db to abstract the interface across | |
333 | the various thread libraries (libc_r, libkse, and libthr). | |
334 | ||
335 | FreeBSD 7.0 switched the default threading library from from libkse | |
336 | to libpthread and removed libc_r. | |
337 | ||
338 | FreeBSD 8.0 removed libkse and the in-kernel support for it. The | |
339 | only threading library supported by 8.0 and later is libthr which | |
340 | ties each user thread directly to an LWP. To simplify the | |
341 | implementation, this target only supports LWP-backed threads using | |
342 | ptrace directly rather than libthread_db. | |
343 | ||
344 | FreeBSD 11.0 introduced LWP event reporting via PT_LWP_EVENTS. | |
345 | */ | |
346 | ||
347 | /* Return true if PTID is still active in the inferior. */ | |
348 | ||
349 | static int | |
350 | fbsd_thread_alive (struct target_ops *ops, ptid_t ptid) | |
351 | { | |
352 | if (ptid_lwp_p (ptid)) | |
353 | { | |
354 | struct ptrace_lwpinfo pl; | |
355 | ||
356 | if (ptrace (PT_LWPINFO, ptid_get_lwp (ptid), (caddr_t) &pl, sizeof pl) | |
357 | == -1) | |
358 | return 0; | |
359 | #ifdef PL_FLAG_EXITED | |
360 | if (pl.pl_flags & PL_FLAG_EXITED) | |
361 | return 0; | |
362 | #endif | |
363 | } | |
364 | ||
365 | return 1; | |
366 | } | |
367 | ||
368 | /* Convert PTID to a string. Returns the string in a static | |
369 | buffer. */ | |
370 | ||
7a114964 | 371 | static const char * |
6e9567fe JB |
372 | fbsd_pid_to_str (struct target_ops *ops, ptid_t ptid) |
373 | { | |
374 | lwpid_t lwp; | |
375 | ||
376 | lwp = ptid_get_lwp (ptid); | |
377 | if (lwp != 0) | |
378 | { | |
379 | static char buf[64]; | |
380 | int pid = ptid_get_pid (ptid); | |
381 | ||
b2bae2f7 | 382 | xsnprintf (buf, sizeof buf, "LWP %d of process %d", lwp, pid); |
6e9567fe JB |
383 | return buf; |
384 | } | |
385 | ||
386 | return normal_pid_to_str (ptid); | |
387 | } | |
388 | ||
389 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
390 | /* Return the name assigned to a thread by an application. Returns | |
391 | the string in a static buffer. */ | |
392 | ||
393 | static const char * | |
394 | fbsd_thread_name (struct target_ops *self, struct thread_info *thr) | |
395 | { | |
396 | struct ptrace_lwpinfo pl; | |
397 | struct kinfo_proc kp; | |
398 | int pid = ptid_get_pid (thr->ptid); | |
399 | long lwp = ptid_get_lwp (thr->ptid); | |
400 | static char buf[sizeof pl.pl_tdname + 1]; | |
401 | ||
402 | /* Note that ptrace_lwpinfo returns the process command in pl_tdname | |
403 | if a name has not been set explicitly. Return a NULL name in | |
404 | that case. */ | |
405 | fbsd_fetch_kinfo_proc (pid, &kp); | |
406 | if (ptrace (PT_LWPINFO, lwp, (caddr_t) &pl, sizeof pl) == -1) | |
407 | perror_with_name (("ptrace")); | |
408 | if (strcmp (kp.ki_comm, pl.pl_tdname) == 0) | |
409 | return NULL; | |
410 | xsnprintf (buf, sizeof buf, "%s", pl.pl_tdname); | |
411 | return buf; | |
412 | } | |
413 | #endif | |
414 | ||
da95a26c | 415 | /* Enable additional event reporting on new processes. |
6e9567fe | 416 | |
da95a26c JB |
417 | To catch fork events, PTRACE_FORK is set on every traced process |
418 | to enable stops on returns from fork or vfork. Note that both the | |
419 | parent and child will always stop, even if system call stops are | |
420 | not enabled. | |
421 | ||
422 | To catch LWP events, PTRACE_EVENTS is set on every traced process. | |
6e9567fe JB |
423 | This enables stops on the birth for new LWPs (excluding the "main" LWP) |
424 | and the death of LWPs (excluding the last LWP in a process). Note | |
425 | that unlike fork events, the LWP that creates a new LWP does not | |
426 | report an event. */ | |
427 | ||
428 | static void | |
da95a26c | 429 | fbsd_enable_proc_events (pid_t pid) |
6e9567fe | 430 | { |
da95a26c JB |
431 | #ifdef PT_GET_EVENT_MASK |
432 | int events; | |
433 | ||
434 | if (ptrace (PT_GET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, | |
435 | sizeof (events)) == -1) | |
436 | perror_with_name (("ptrace")); | |
437 | events |= PTRACE_FORK | PTRACE_LWP; | |
dbaed385 JB |
438 | #ifdef PTRACE_VFORK |
439 | events |= PTRACE_VFORK; | |
440 | #endif | |
da95a26c JB |
441 | if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, |
442 | sizeof (events)) == -1) | |
443 | perror_with_name (("ptrace")); | |
444 | #else | |
445 | #ifdef TDP_RFPPWAIT | |
446 | if (ptrace (PT_FOLLOW_FORK, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) | |
447 | perror_with_name (("ptrace")); | |
448 | #endif | |
449 | #ifdef PT_LWP_EVENTS | |
6e9567fe JB |
450 | if (ptrace (PT_LWP_EVENTS, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) |
451 | perror_with_name (("ptrace")); | |
6e9567fe | 452 | #endif |
da95a26c JB |
453 | #endif |
454 | } | |
6e9567fe JB |
455 | |
456 | /* Add threads for any new LWPs in a process. | |
457 | ||
458 | When LWP events are used, this function is only used to detect existing | |
459 | threads when attaching to a process. On older systems, this function is | |
460 | called to discover new threads each time the thread list is updated. */ | |
461 | ||
462 | static void | |
463 | fbsd_add_threads (pid_t pid) | |
464 | { | |
465 | struct cleanup *cleanup; | |
466 | lwpid_t *lwps; | |
467 | int i, nlwps; | |
468 | ||
469 | gdb_assert (!in_thread_list (pid_to_ptid (pid))); | |
470 | nlwps = ptrace (PT_GETNUMLWPS, pid, NULL, 0); | |
471 | if (nlwps == -1) | |
472 | perror_with_name (("ptrace")); | |
473 | ||
474 | lwps = XCNEWVEC (lwpid_t, nlwps); | |
475 | cleanup = make_cleanup (xfree, lwps); | |
476 | ||
477 | nlwps = ptrace (PT_GETLWPLIST, pid, (caddr_t) lwps, nlwps); | |
478 | if (nlwps == -1) | |
479 | perror_with_name (("ptrace")); | |
480 | ||
481 | for (i = 0; i < nlwps; i++) | |
482 | { | |
483 | ptid_t ptid = ptid_build (pid, lwps[i], 0); | |
484 | ||
485 | if (!in_thread_list (ptid)) | |
486 | { | |
487 | #ifdef PT_LWP_EVENTS | |
488 | struct ptrace_lwpinfo pl; | |
489 | ||
490 | /* Don't add exited threads. Note that this is only called | |
491 | when attaching to a multi-threaded process. */ | |
492 | if (ptrace (PT_LWPINFO, lwps[i], (caddr_t) &pl, sizeof pl) == -1) | |
493 | perror_with_name (("ptrace")); | |
494 | if (pl.pl_flags & PL_FLAG_EXITED) | |
495 | continue; | |
496 | #endif | |
497 | if (debug_fbsd_lwp) | |
498 | fprintf_unfiltered (gdb_stdlog, | |
499 | "FLWP: adding thread for LWP %u\n", | |
500 | lwps[i]); | |
501 | add_thread (ptid); | |
502 | } | |
503 | } | |
504 | do_cleanups (cleanup); | |
505 | } | |
506 | ||
507 | /* Implement the "to_update_thread_list" target_ops method. */ | |
508 | ||
509 | static void | |
510 | fbsd_update_thread_list (struct target_ops *ops) | |
511 | { | |
512 | #ifdef PT_LWP_EVENTS | |
513 | /* With support for thread events, threads are added/deleted from the | |
514 | list as events are reported, so just try deleting exited threads. */ | |
515 | delete_exited_threads (); | |
516 | #else | |
517 | prune_threads (); | |
518 | ||
519 | fbsd_add_threads (ptid_get_pid (inferior_ptid)); | |
520 | #endif | |
521 | } | |
522 | ||
e58e05d6 JB |
523 | #ifdef TDP_RFPPWAIT |
524 | /* | |
525 | To catch fork events, PT_FOLLOW_FORK is set on every traced process | |
526 | to enable stops on returns from fork or vfork. Note that both the | |
527 | parent and child will always stop, even if system call stops are not | |
528 | enabled. | |
529 | ||
530 | After a fork, both the child and parent process will stop and report | |
531 | an event. However, there is no guarantee of order. If the parent | |
532 | reports its stop first, then fbsd_wait explicitly waits for the new | |
533 | child before returning. If the child reports its stop first, then | |
534 | the event is saved on a list and ignored until the parent's stop is | |
535 | reported. fbsd_wait could have been changed to fetch the parent PID | |
536 | of the new child and used that to wait for the parent explicitly. | |
537 | However, if two threads in the parent fork at the same time, then | |
538 | the wait on the parent might return the "wrong" fork event. | |
539 | ||
540 | The initial version of PT_FOLLOW_FORK did not set PL_FLAG_CHILD for | |
541 | the new child process. This flag could be inferred by treating any | |
542 | events for an unknown pid as a new child. | |
543 | ||
544 | In addition, the initial version of PT_FOLLOW_FORK did not report a | |
545 | stop event for the parent process of a vfork until after the child | |
546 | process executed a new program or exited. The kernel was changed to | |
547 | defer the wait for exit or exec of the child until after posting the | |
548 | stop event shortly after the change to introduce PL_FLAG_CHILD. | |
549 | This could be worked around by reporting a vfork event when the | |
550 | child event posted and ignoring the subsequent event from the | |
551 | parent. | |
552 | ||
553 | This implementation requires both of these fixes for simplicity's | |
554 | sake. FreeBSD versions newer than 9.1 contain both fixes. | |
555 | */ | |
556 | ||
2c5c2a33 | 557 | struct fbsd_fork_info |
e58e05d6 | 558 | { |
2c5c2a33 JB |
559 | struct fbsd_fork_info *next; |
560 | ptid_t ptid; | |
e58e05d6 JB |
561 | }; |
562 | ||
2c5c2a33 | 563 | static struct fbsd_fork_info *fbsd_pending_children; |
e58e05d6 JB |
564 | |
565 | /* Record a new child process event that is reported before the | |
566 | corresponding fork event in the parent. */ | |
567 | ||
568 | static void | |
6e9567fe | 569 | fbsd_remember_child (ptid_t pid) |
e58e05d6 | 570 | { |
2c5c2a33 | 571 | struct fbsd_fork_info *info = XCNEW (struct fbsd_fork_info); |
e58e05d6 | 572 | |
2c5c2a33 | 573 | info->ptid = pid; |
e58e05d6 JB |
574 | info->next = fbsd_pending_children; |
575 | fbsd_pending_children = info; | |
576 | } | |
577 | ||
578 | /* Check for a previously-recorded new child process event for PID. | |
6e9567fe | 579 | If one is found, remove it from the list and return the PTID. */ |
e58e05d6 | 580 | |
6e9567fe | 581 | static ptid_t |
e58e05d6 JB |
582 | fbsd_is_child_pending (pid_t pid) |
583 | { | |
2c5c2a33 | 584 | struct fbsd_fork_info *info, *prev; |
6e9567fe | 585 | ptid_t ptid; |
e58e05d6 JB |
586 | |
587 | prev = NULL; | |
588 | for (info = fbsd_pending_children; info; prev = info, info = info->next) | |
589 | { | |
2c5c2a33 | 590 | if (ptid_get_pid (info->ptid) == pid) |
e58e05d6 JB |
591 | { |
592 | if (prev == NULL) | |
593 | fbsd_pending_children = info->next; | |
594 | else | |
595 | prev->next = info->next; | |
2c5c2a33 | 596 | ptid = info->ptid; |
e58e05d6 | 597 | xfree (info); |
6e9567fe | 598 | return ptid; |
e58e05d6 JB |
599 | } |
600 | } | |
6e9567fe | 601 | return null_ptid; |
e58e05d6 | 602 | } |
2c5c2a33 | 603 | |
dbaed385 | 604 | #ifndef PTRACE_VFORK |
2c5c2a33 JB |
605 | static struct fbsd_fork_info *fbsd_pending_vfork_done; |
606 | ||
607 | /* Record a pending vfork done event. */ | |
608 | ||
609 | static void | |
610 | fbsd_add_vfork_done (ptid_t pid) | |
611 | { | |
612 | struct fbsd_fork_info *info = XCNEW (struct fbsd_fork_info); | |
613 | ||
614 | info->ptid = pid; | |
615 | info->next = fbsd_pending_vfork_done; | |
616 | fbsd_pending_vfork_done = info; | |
617 | } | |
618 | ||
619 | /* Check for a pending vfork done event for a specific PID. */ | |
620 | ||
621 | static int | |
622 | fbsd_is_vfork_done_pending (pid_t pid) | |
623 | { | |
624 | struct fbsd_fork_info *info; | |
625 | ||
626 | for (info = fbsd_pending_vfork_done; info != NULL; info = info->next) | |
627 | { | |
628 | if (ptid_get_pid (info->ptid) == pid) | |
629 | return 1; | |
630 | } | |
631 | return 0; | |
632 | } | |
633 | ||
634 | /* Check for a pending vfork done event. If one is found, remove it | |
635 | from the list and return the PTID. */ | |
636 | ||
ee950322 | 637 | static ptid_t |
2c5c2a33 JB |
638 | fbsd_next_vfork_done (void) |
639 | { | |
640 | struct fbsd_fork_info *info; | |
641 | ptid_t ptid; | |
642 | ||
643 | if (fbsd_pending_vfork_done != NULL) | |
644 | { | |
645 | info = fbsd_pending_vfork_done; | |
646 | fbsd_pending_vfork_done = info->next; | |
647 | ptid = info->ptid; | |
648 | xfree (info); | |
649 | return ptid; | |
650 | } | |
651 | return null_ptid; | |
652 | } | |
e58e05d6 | 653 | #endif |
dbaed385 | 654 | #endif |
e58e05d6 | 655 | |
8607ea63 JB |
656 | /* Implement the "to_resume" target_ops method. */ |
657 | ||
658 | static void | |
659 | fbsd_resume (struct target_ops *ops, | |
660 | ptid_t ptid, int step, enum gdb_signal signo) | |
661 | { | |
dbaed385 | 662 | #if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK) |
2c5c2a33 JB |
663 | pid_t pid; |
664 | ||
665 | /* Don't PT_CONTINUE a process which has a pending vfork done event. */ | |
666 | if (ptid_equal (minus_one_ptid, ptid)) | |
667 | pid = ptid_get_pid (inferior_ptid); | |
668 | else | |
669 | pid = ptid_get_pid (ptid); | |
670 | if (fbsd_is_vfork_done_pending (pid)) | |
671 | return; | |
672 | #endif | |
8607ea63 JB |
673 | |
674 | if (debug_fbsd_lwp) | |
675 | fprintf_unfiltered (gdb_stdlog, | |
676 | "FLWP: fbsd_resume for ptid (%d, %ld, %ld)\n", | |
677 | ptid_get_pid (ptid), ptid_get_lwp (ptid), | |
678 | ptid_get_tid (ptid)); | |
679 | if (ptid_lwp_p (ptid)) | |
680 | { | |
681 | /* If ptid is a specific LWP, suspend all other LWPs in the process. */ | |
d56060f0 JB |
682 | struct thread_info *tp; |
683 | int request; | |
684 | ||
685 | ALL_NON_EXITED_THREADS (tp) | |
686 | { | |
687 | if (ptid_get_pid (tp->ptid) != ptid_get_pid (ptid)) | |
688 | continue; | |
689 | ||
690 | if (ptid_get_lwp (tp->ptid) == ptid_get_lwp (ptid)) | |
691 | request = PT_RESUME; | |
692 | else | |
693 | request = PT_SUSPEND; | |
694 | ||
695 | if (ptrace (request, ptid_get_lwp (tp->ptid), NULL, 0) == -1) | |
696 | perror_with_name (("ptrace")); | |
697 | } | |
8607ea63 JB |
698 | } |
699 | else | |
700 | { | |
701 | /* If ptid is a wildcard, resume all matching threads (they won't run | |
702 | until the process is continued however). */ | |
d56060f0 JB |
703 | struct thread_info *tp; |
704 | ||
705 | ALL_NON_EXITED_THREADS (tp) | |
706 | { | |
707 | if (!ptid_match (tp->ptid, ptid)) | |
708 | continue; | |
709 | ||
710 | if (ptrace (PT_RESUME, ptid_get_lwp (tp->ptid), NULL, 0) == -1) | |
711 | perror_with_name (("ptrace")); | |
712 | } | |
8607ea63 JB |
713 | ptid = inferior_ptid; |
714 | } | |
715 | super_resume (ops, ptid, step, signo); | |
716 | } | |
717 | ||
e58e05d6 JB |
718 | /* Wait for the child specified by PTID to do something. Return the |
719 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
720 | the status in *OURSTATUS. */ | |
721 | ||
722 | static ptid_t | |
723 | fbsd_wait (struct target_ops *ops, | |
724 | ptid_t ptid, struct target_waitstatus *ourstatus, | |
725 | int target_options) | |
726 | { | |
727 | ptid_t wptid; | |
728 | ||
729 | while (1) | |
730 | { | |
dbaed385 | 731 | #ifndef PTRACE_VFORK |
2c5c2a33 JB |
732 | wptid = fbsd_next_vfork_done (); |
733 | if (!ptid_equal (wptid, null_ptid)) | |
734 | { | |
735 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
736 | return wptid; | |
737 | } | |
dbaed385 | 738 | #endif |
e58e05d6 JB |
739 | wptid = super_wait (ops, ptid, ourstatus, target_options); |
740 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED) | |
741 | { | |
742 | struct ptrace_lwpinfo pl; | |
743 | pid_t pid; | |
744 | int status; | |
745 | ||
746 | pid = ptid_get_pid (wptid); | |
6e9567fe | 747 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) |
e58e05d6 JB |
748 | perror_with_name (("ptrace")); |
749 | ||
6e9567fe JB |
750 | wptid = ptid_build (pid, pl.pl_lwpid, 0); |
751 | ||
752 | #ifdef PT_LWP_EVENTS | |
753 | if (pl.pl_flags & PL_FLAG_EXITED) | |
754 | { | |
755 | /* If GDB attaches to a multi-threaded process, exiting | |
756 | threads might be skipped during fbsd_post_attach that | |
757 | have not yet reported their PL_FLAG_EXITED event. | |
758 | Ignore EXITED events for an unknown LWP. */ | |
759 | if (in_thread_list (wptid)) | |
760 | { | |
761 | if (debug_fbsd_lwp) | |
762 | fprintf_unfiltered (gdb_stdlog, | |
763 | "FLWP: deleting thread for LWP %u\n", | |
764 | pl.pl_lwpid); | |
765 | if (print_thread_events) | |
766 | printf_unfiltered (_("[%s exited]\n"), target_pid_to_str | |
767 | (wptid)); | |
768 | delete_thread (wptid); | |
769 | } | |
770 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
771 | perror_with_name (("ptrace")); | |
772 | continue; | |
773 | } | |
774 | #endif | |
775 | ||
776 | /* Switch to an LWP PTID on the first stop in a new process. | |
777 | This is done after handling PL_FLAG_EXITED to avoid | |
778 | switching to an exited LWP. It is done before checking | |
779 | PL_FLAG_BORN in case the first stop reported after | |
780 | attaching to an existing process is a PL_FLAG_BORN | |
781 | event. */ | |
782 | if (in_thread_list (pid_to_ptid (pid))) | |
783 | { | |
784 | if (debug_fbsd_lwp) | |
785 | fprintf_unfiltered (gdb_stdlog, | |
786 | "FLWP: using LWP %u for first thread\n", | |
787 | pl.pl_lwpid); | |
788 | thread_change_ptid (pid_to_ptid (pid), wptid); | |
789 | } | |
790 | ||
791 | #ifdef PT_LWP_EVENTS | |
792 | if (pl.pl_flags & PL_FLAG_BORN) | |
793 | { | |
794 | /* If GDB attaches to a multi-threaded process, newborn | |
795 | threads might be added by fbsd_add_threads that have | |
796 | not yet reported their PL_FLAG_BORN event. Ignore | |
797 | BORN events for an already-known LWP. */ | |
798 | if (!in_thread_list (wptid)) | |
799 | { | |
800 | if (debug_fbsd_lwp) | |
801 | fprintf_unfiltered (gdb_stdlog, | |
802 | "FLWP: adding thread for LWP %u\n", | |
803 | pl.pl_lwpid); | |
804 | add_thread (wptid); | |
805 | } | |
806 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
807 | return wptid; | |
808 | } | |
809 | #endif | |
810 | ||
e58e05d6 JB |
811 | #ifdef TDP_RFPPWAIT |
812 | if (pl.pl_flags & PL_FLAG_FORKED) | |
813 | { | |
dbaed385 | 814 | #ifndef PTRACE_VFORK |
e58e05d6 | 815 | struct kinfo_proc kp; |
dbaed385 | 816 | #endif |
6e9567fe | 817 | ptid_t child_ptid; |
e58e05d6 JB |
818 | pid_t child; |
819 | ||
820 | child = pl.pl_child_pid; | |
821 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
dbaed385 JB |
822 | #ifdef PTRACE_VFORK |
823 | if (pl.pl_flags & PL_FLAG_VFORKED) | |
824 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
825 | #endif | |
e58e05d6 JB |
826 | |
827 | /* Make sure the other end of the fork is stopped too. */ | |
6e9567fe JB |
828 | child_ptid = fbsd_is_child_pending (child); |
829 | if (ptid_equal (child_ptid, null_ptid)) | |
e58e05d6 JB |
830 | { |
831 | pid = waitpid (child, &status, 0); | |
832 | if (pid == -1) | |
833 | perror_with_name (("waitpid")); | |
834 | ||
835 | gdb_assert (pid == child); | |
836 | ||
837 | if (ptrace (PT_LWPINFO, child, (caddr_t)&pl, sizeof pl) == -1) | |
838 | perror_with_name (("ptrace")); | |
839 | ||
840 | gdb_assert (pl.pl_flags & PL_FLAG_CHILD); | |
6e9567fe | 841 | child_ptid = ptid_build (child, pl.pl_lwpid, 0); |
e58e05d6 JB |
842 | } |
843 | ||
5fa14c6b JB |
844 | /* Enable additional events on the child process. */ |
845 | fbsd_enable_proc_events (ptid_get_pid (child_ptid)); | |
846 | ||
dbaed385 | 847 | #ifndef PTRACE_VFORK |
e58e05d6 JB |
848 | /* For vfork, the child process will have the P_PPWAIT |
849 | flag set. */ | |
850 | fbsd_fetch_kinfo_proc (child, &kp); | |
851 | if (kp.ki_flag & P_PPWAIT) | |
852 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
dbaed385 | 853 | #endif |
6e9567fe | 854 | ourstatus->value.related_pid = child_ptid; |
e58e05d6 JB |
855 | |
856 | return wptid; | |
857 | } | |
858 | ||
859 | if (pl.pl_flags & PL_FLAG_CHILD) | |
860 | { | |
861 | /* Remember that this child forked, but do not report it | |
862 | until the parent reports its corresponding fork | |
863 | event. */ | |
6e9567fe | 864 | fbsd_remember_child (wptid); |
e58e05d6 JB |
865 | continue; |
866 | } | |
dbaed385 JB |
867 | |
868 | #ifdef PTRACE_VFORK | |
869 | if (pl.pl_flags & PL_FLAG_VFORK_DONE) | |
870 | { | |
871 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
872 | return wptid; | |
873 | } | |
874 | #endif | |
e58e05d6 | 875 | #endif |
d2b41ca0 JB |
876 | |
877 | #ifdef PL_FLAG_EXEC | |
878 | if (pl.pl_flags & PL_FLAG_EXEC) | |
879 | { | |
880 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
881 | ourstatus->value.execd_pathname | |
882 | = xstrdup (fbsd_pid_to_exec_file (NULL, pid)); | |
883 | return wptid; | |
884 | } | |
885 | #endif | |
e6cdd38e JB |
886 | |
887 | /* Note that PL_FLAG_SCE is set for any event reported while | |
888 | a thread is executing a system call in the kernel. In | |
889 | particular, signals that interrupt a sleep in a system | |
890 | call will report this flag as part of their event. Stops | |
891 | explicitly for system call entry and exit always use | |
892 | SIGTRAP, so only treat SIGTRAP events as system call | |
893 | entry/exit events. */ | |
894 | if (pl.pl_flags & (PL_FLAG_SCE | PL_FLAG_SCX) | |
895 | && ourstatus->value.sig == SIGTRAP) | |
896 | { | |
897 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
898 | if (catch_syscall_enabled ()) | |
899 | { | |
900 | if (catching_syscall_number (pl.pl_syscall_code)) | |
901 | { | |
902 | if (pl.pl_flags & PL_FLAG_SCE) | |
903 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
904 | else | |
905 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
906 | ourstatus->value.syscall_number = pl.pl_syscall_code; | |
907 | return wptid; | |
908 | } | |
909 | } | |
910 | #endif | |
911 | /* If the core isn't interested in this event, just | |
912 | continue the process explicitly and wait for another | |
913 | event. Note that PT_SYSCALL is "sticky" on FreeBSD | |
914 | and once system call stops are enabled on a process | |
915 | it stops for all system call entries and exits. */ | |
916 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
917 | perror_with_name (("ptrace")); | |
918 | continue; | |
919 | } | |
e58e05d6 JB |
920 | } |
921 | return wptid; | |
922 | } | |
923 | } | |
924 | ||
925 | #ifdef TDP_RFPPWAIT | |
926 | /* Target hook for follow_fork. On entry and at return inferior_ptid is | |
927 | the ptid of the followed inferior. */ | |
928 | ||
929 | static int | |
930 | fbsd_follow_fork (struct target_ops *ops, int follow_child, | |
931 | int detach_fork) | |
932 | { | |
bb2a62e6 | 933 | if (!follow_child && detach_fork) |
e58e05d6 JB |
934 | { |
935 | struct thread_info *tp = inferior_thread (); | |
936 | pid_t child_pid = ptid_get_pid (tp->pending_follow.value.related_pid); | |
937 | ||
938 | /* Breakpoints have already been detached from the child by | |
939 | infrun.c. */ | |
940 | ||
941 | if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1) | |
942 | perror_with_name (("ptrace")); | |
2c5c2a33 | 943 | |
dbaed385 JB |
944 | #ifndef PTRACE_VFORK |
945 | if (tp->pending_follow.kind == TARGET_WAITKIND_VFORKED) | |
2c5c2a33 JB |
946 | { |
947 | /* We can't insert breakpoints until the child process has | |
948 | finished with the shared memory region. The parent | |
949 | process doesn't wait for the child process to exit or | |
950 | exec until after it has been resumed from the ptrace stop | |
951 | to report the fork. Once it has been resumed it doesn't | |
952 | stop again before returning to userland, so there is no | |
953 | reliable way to wait on the parent. | |
954 | ||
955 | We can't stay attached to the child to wait for an exec | |
956 | or exit because it may invoke ptrace(PT_TRACE_ME) | |
957 | (e.g. if the parent process is a debugger forking a new | |
958 | child process). | |
959 | ||
960 | In the end, the best we can do is to make sure it runs | |
961 | for a little while. Hopefully it will be out of range of | |
962 | any breakpoints we reinsert. Usually this is only the | |
963 | single-step breakpoint at vfork's return point. */ | |
964 | ||
965 | usleep (10000); | |
966 | ||
967 | /* Schedule a fake VFORK_DONE event to report on the next | |
968 | wait. */ | |
969 | fbsd_add_vfork_done (inferior_ptid); | |
970 | } | |
dbaed385 | 971 | #endif |
e58e05d6 JB |
972 | } |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | static int | |
978 | fbsd_insert_fork_catchpoint (struct target_ops *self, int pid) | |
979 | { | |
980 | return 0; | |
981 | } | |
982 | ||
983 | static int | |
984 | fbsd_remove_fork_catchpoint (struct target_ops *self, int pid) | |
985 | { | |
986 | return 0; | |
987 | } | |
988 | ||
989 | static int | |
990 | fbsd_insert_vfork_catchpoint (struct target_ops *self, int pid) | |
991 | { | |
992 | return 0; | |
993 | } | |
994 | ||
995 | static int | |
996 | fbsd_remove_vfork_catchpoint (struct target_ops *self, int pid) | |
997 | { | |
998 | return 0; | |
999 | } | |
6e9567fe | 1000 | #endif |
e58e05d6 JB |
1001 | |
1002 | /* Implement the "to_post_startup_inferior" target_ops method. */ | |
1003 | ||
1004 | static void | |
1005 | fbsd_post_startup_inferior (struct target_ops *self, ptid_t pid) | |
1006 | { | |
da95a26c | 1007 | fbsd_enable_proc_events (ptid_get_pid (pid)); |
e58e05d6 JB |
1008 | } |
1009 | ||
1010 | /* Implement the "to_post_attach" target_ops method. */ | |
1011 | ||
1012 | static void | |
1013 | fbsd_post_attach (struct target_ops *self, int pid) | |
1014 | { | |
da95a26c | 1015 | fbsd_enable_proc_events (pid); |
6e9567fe JB |
1016 | fbsd_add_threads (pid); |
1017 | } | |
d2b41ca0 JB |
1018 | |
1019 | #ifdef PL_FLAG_EXEC | |
1020 | /* If the FreeBSD kernel supports PL_FLAG_EXEC, then traced processes | |
1021 | will always stop after exec. */ | |
1022 | ||
1023 | static int | |
1024 | fbsd_insert_exec_catchpoint (struct target_ops *self, int pid) | |
1025 | { | |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static int | |
1030 | fbsd_remove_exec_catchpoint (struct target_ops *self, int pid) | |
1031 | { | |
1032 | return 0; | |
1033 | } | |
1034 | #endif | |
e6cdd38e JB |
1035 | |
1036 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1037 | static int | |
1038 | fbsd_set_syscall_catchpoint (struct target_ops *self, int pid, int needed, | |
1039 | int any_count, int table_size, int *table) | |
1040 | { | |
1041 | ||
1042 | /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which | |
1043 | will catch all system call entries and exits. The system calls | |
1044 | are filtered by GDB rather than the kernel. */ | |
1045 | return 0; | |
1046 | } | |
1047 | #endif | |
e58e05d6 JB |
1048 | #endif |
1049 | ||
8f60fe01 JB |
1050 | void |
1051 | fbsd_nat_add_target (struct target_ops *t) | |
1052 | { | |
1053 | t->to_pid_to_exec_file = fbsd_pid_to_exec_file; | |
1054 | t->to_find_memory_regions = fbsd_find_memory_regions; | |
7697fc9e JB |
1055 | #ifdef KERN_PROC_AUXV |
1056 | super_xfer_partial = t->to_xfer_partial; | |
1057 | t->to_xfer_partial = fbsd_xfer_partial; | |
1058 | #endif | |
e58e05d6 | 1059 | #ifdef PT_LWPINFO |
6e9567fe JB |
1060 | t->to_thread_alive = fbsd_thread_alive; |
1061 | t->to_pid_to_str = fbsd_pid_to_str; | |
1062 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
1063 | t->to_thread_name = fbsd_thread_name; | |
1064 | #endif | |
1065 | t->to_update_thread_list = fbsd_update_thread_list; | |
1066 | t->to_has_thread_control = tc_schedlock; | |
1067 | super_resume = t->to_resume; | |
1068 | t->to_resume = fbsd_resume; | |
e58e05d6 JB |
1069 | super_wait = t->to_wait; |
1070 | t->to_wait = fbsd_wait; | |
6e9567fe JB |
1071 | t->to_post_startup_inferior = fbsd_post_startup_inferior; |
1072 | t->to_post_attach = fbsd_post_attach; | |
e58e05d6 JB |
1073 | #ifdef TDP_RFPPWAIT |
1074 | t->to_follow_fork = fbsd_follow_fork; | |
1075 | t->to_insert_fork_catchpoint = fbsd_insert_fork_catchpoint; | |
1076 | t->to_remove_fork_catchpoint = fbsd_remove_fork_catchpoint; | |
1077 | t->to_insert_vfork_catchpoint = fbsd_insert_vfork_catchpoint; | |
1078 | t->to_remove_vfork_catchpoint = fbsd_remove_vfork_catchpoint; | |
e58e05d6 | 1079 | #endif |
d2b41ca0 JB |
1080 | #ifdef PL_FLAG_EXEC |
1081 | t->to_insert_exec_catchpoint = fbsd_insert_exec_catchpoint; | |
1082 | t->to_remove_exec_catchpoint = fbsd_remove_exec_catchpoint; | |
1083 | #endif | |
e6cdd38e JB |
1084 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE |
1085 | t->to_set_syscall_catchpoint = fbsd_set_syscall_catchpoint; | |
1086 | #endif | |
e58e05d6 | 1087 | #endif |
8f60fe01 JB |
1088 | add_target (t); |
1089 | } | |
6e9567fe JB |
1090 | |
1091 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
1092 | extern initialize_file_ftype _initialize_fbsd_nat; | |
1093 | ||
1094 | void | |
1095 | _initialize_fbsd_nat (void) | |
1096 | { | |
1097 | #ifdef PT_LWPINFO | |
1098 | add_setshow_boolean_cmd ("fbsd-lwp", class_maintenance, | |
1099 | &debug_fbsd_lwp, _("\ | |
1100 | Set debugging of FreeBSD lwp module."), _("\ | |
1101 | Show debugging of FreeBSD lwp module."), _("\ | |
1102 | Enables printf debugging output."), | |
1103 | NULL, | |
1104 | &show_fbsd_lwp_debug, | |
1105 | &setdebuglist, &showdebuglist); | |
1106 | #endif | |
1107 | } |