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578c1c03 MK |
1 | /* Native-dependent code for FreeBSD. |
2 | ||
42a4f53d | 3 | Copyright (C) 2002-2019 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" | |
d55e5aa6 TT |
21 | |
22 | /* Standard C includes. */ | |
23 | #if defined(HAVE_KINFO_GETFILE) || defined(HAVE_KINFO_GETVMMAP) | |
24 | #include <libutil.h> | |
25 | #endif | |
68b9939a | 26 | #include <sys/procfs.h> |
e58e05d6 | 27 | #include <sys/ptrace.h> |
929edea9 | 28 | #include <sys/signal.h> |
68b9939a | 29 | #include <sys/sysctl.h> |
d55e5aa6 | 30 | #include <sys/types.h> |
25268153 | 31 | #include <sys/user.h> |
d55e5aa6 TT |
32 | |
33 | /* Standard C++ includes. */ | |
34 | #include <list> | |
35 | ||
36 | /* Local non-gdb includes. */ | |
37 | #include "common/byte-vector.h" | |
92fce24d | 38 | #if !defined(HAVE_KINFO_GETVMMAP) |
0747795c | 39 | #include "common/filestuff.h" |
25268153 | 40 | #endif |
d55e5aa6 | 41 | #include "common/gdb_wait.h" |
578c1c03 MK |
42 | #include "elf-bfd.h" |
43 | #include "fbsd-nat.h" | |
92fce24d | 44 | #include "fbsd-tdep.h" |
d55e5aa6 TT |
45 | #include "gdbcmd.h" |
46 | #include "gdbcore.h" | |
47 | #include "gdbthread.h" | |
48 | #include "inf-ptrace.h" | |
49 | #include "inferior.h" | |
50 | #include "regcache.h" | |
51 | #include "regset.h" | |
e8c6b620 | 52 | |
766062f6 | 53 | /* Return the name of a file that can be opened to get the symbols for |
578c1c03 MK |
54 | the child process identified by PID. */ |
55 | ||
f6ac5f3d PA |
56 | char * |
57 | fbsd_nat_target::pid_to_exec_file (int pid) | |
578c1c03 | 58 | { |
f2feec98 | 59 | ssize_t len; |
b4ab256d HZ |
60 | static char buf[PATH_MAX]; |
61 | char name[PATH_MAX]; | |
578c1c03 | 62 | |
68b9939a | 63 | #ifdef KERN_PROC_PATHNAME |
f2feec98 | 64 | size_t buflen; |
68b9939a | 65 | int mib[4]; |
578c1c03 | 66 | |
68b9939a MK |
67 | mib[0] = CTL_KERN; |
68 | mib[1] = KERN_PROC; | |
69 | mib[2] = KERN_PROC_PATHNAME; | |
70 | mib[3] = pid; | |
f2feec98 JB |
71 | buflen = sizeof buf; |
72 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
b999e203 JB |
73 | /* The kern.proc.pathname.<pid> sysctl returns a length of zero |
74 | for processes without an associated executable such as kernel | |
75 | processes. */ | |
76 | return buflen == 0 ? NULL : buf; | |
68b9939a | 77 | #endif |
578c1c03 | 78 | |
b4ab256d HZ |
79 | xsnprintf (name, PATH_MAX, "/proc/%d/exe", pid); |
80 | len = readlink (name, buf, PATH_MAX - 1); | |
81 | if (len != -1) | |
68b9939a | 82 | { |
b4ab256d HZ |
83 | buf[len] = '\0'; |
84 | return buf; | |
68b9939a MK |
85 | } |
86 | ||
b4ab256d | 87 | return NULL; |
578c1c03 MK |
88 | } |
89 | ||
25268153 JB |
90 | #ifdef HAVE_KINFO_GETVMMAP |
91 | /* Iterate over all the memory regions in the current inferior, | |
92 | calling FUNC for each memory region. OBFD is passed as the last | |
93 | argument to FUNC. */ | |
94 | ||
f6ac5f3d PA |
95 | int |
96 | fbsd_nat_target::find_memory_regions (find_memory_region_ftype func, | |
97 | void *obfd) | |
25268153 | 98 | { |
e99b03dc | 99 | pid_t pid = inferior_ptid.pid (); |
e4a26669 | 100 | struct kinfo_vmentry *kve; |
25268153 | 101 | uint64_t size; |
25268153 JB |
102 | int i, nitems; |
103 | ||
262f62f5 | 104 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> |
e4a26669 | 105 | vmentl (kinfo_getvmmap (pid, &nitems)); |
25268153 JB |
106 | if (vmentl == NULL) |
107 | perror_with_name (_("Couldn't fetch VM map entries.")); | |
25268153 | 108 | |
e4a26669 | 109 | for (i = 0, kve = vmentl.get (); i < nitems; i++, kve++) |
25268153 | 110 | { |
25268153 JB |
111 | /* Skip unreadable segments and those where MAP_NOCORE has been set. */ |
112 | if (!(kve->kve_protection & KVME_PROT_READ) | |
113 | || kve->kve_flags & KVME_FLAG_NOCOREDUMP) | |
114 | continue; | |
115 | ||
116 | /* Skip segments with an invalid type. */ | |
117 | if (kve->kve_type != KVME_TYPE_DEFAULT | |
118 | && kve->kve_type != KVME_TYPE_VNODE | |
119 | && kve->kve_type != KVME_TYPE_SWAP | |
120 | && kve->kve_type != KVME_TYPE_PHYS) | |
121 | continue; | |
122 | ||
123 | size = kve->kve_end - kve->kve_start; | |
124 | if (info_verbose) | |
125 | { | |
126 | fprintf_filtered (gdb_stdout, | |
127 | "Save segment, %ld bytes at %s (%c%c%c)\n", | |
128 | (long) size, | |
129 | paddress (target_gdbarch (), kve->kve_start), | |
130 | kve->kve_protection & KVME_PROT_READ ? 'r' : '-', | |
131 | kve->kve_protection & KVME_PROT_WRITE ? 'w' : '-', | |
132 | kve->kve_protection & KVME_PROT_EXEC ? 'x' : '-'); | |
133 | } | |
134 | ||
135 | /* Invoke the callback function to create the corefile segment. | |
136 | Pass MODIFIED as true, we do not know the real modification state. */ | |
137 | func (kve->kve_start, size, kve->kve_protection & KVME_PROT_READ, | |
138 | kve->kve_protection & KVME_PROT_WRITE, | |
139 | kve->kve_protection & KVME_PROT_EXEC, 1, obfd); | |
140 | } | |
25268153 JB |
141 | return 0; |
142 | } | |
143 | #else | |
578c1c03 MK |
144 | static int |
145 | fbsd_read_mapping (FILE *mapfile, unsigned long *start, unsigned long *end, | |
146 | char *protection) | |
147 | { | |
148 | /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */ | |
149 | char buf[256]; | |
150 | int resident, privateresident; | |
151 | unsigned long obj; | |
152 | int ret = EOF; | |
153 | ||
154 | /* As of FreeBSD 5.0-RELEASE, the layout is described in | |
155 | /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a | |
156 | new column was added to the procfs map. Therefore we can't use | |
157 | fscanf since we need to support older releases too. */ | |
158 | if (fgets (buf, sizeof buf, mapfile) != NULL) | |
159 | ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end, | |
160 | &resident, &privateresident, &obj, protection); | |
161 | ||
162 | return (ret != 0 && ret != EOF); | |
163 | } | |
164 | ||
165 | /* Iterate over all the memory regions in the current inferior, | |
166 | calling FUNC for each memory region. OBFD is passed as the last | |
167 | argument to FUNC. */ | |
168 | ||
f6ac5f3d PA |
169 | int |
170 | fbsd_nat_target::find_memory_regions (find_memory_region_ftype func, | |
171 | void *obfd) | |
578c1c03 | 172 | { |
e99b03dc | 173 | pid_t pid = inferior_ptid.pid (); |
578c1c03 MK |
174 | unsigned long start, end, size; |
175 | char protection[4]; | |
176 | int read, write, exec; | |
177 | ||
e4a26669 JB |
178 | std::string mapfilename = string_printf ("/proc/%ld/map", (long) pid); |
179 | gdb_file_up mapfile (fopen (mapfilename.c_str (), "r")); | |
578c1c03 | 180 | if (mapfile == NULL) |
e4a26669 | 181 | error (_("Couldn't open %s."), mapfilename.c_str ()); |
578c1c03 MK |
182 | |
183 | if (info_verbose) | |
184 | fprintf_filtered (gdb_stdout, | |
e4a26669 | 185 | "Reading memory regions from %s\n", mapfilename.c_str ()); |
578c1c03 MK |
186 | |
187 | /* Now iterate until end-of-file. */ | |
7cd06d6e | 188 | while (fbsd_read_mapping (mapfile.get (), &start, &end, &protection[0])) |
578c1c03 MK |
189 | { |
190 | size = end - start; | |
191 | ||
192 | read = (strchr (protection, 'r') != 0); | |
193 | write = (strchr (protection, 'w') != 0); | |
194 | exec = (strchr (protection, 'x') != 0); | |
195 | ||
196 | if (info_verbose) | |
197 | { | |
198 | fprintf_filtered (gdb_stdout, | |
5af949e3 | 199 | "Save segment, %ld bytes at %s (%c%c%c)\n", |
f5656ead | 200 | size, paddress (target_gdbarch (), start), |
578c1c03 MK |
201 | read ? 'r' : '-', |
202 | write ? 'w' : '-', | |
203 | exec ? 'x' : '-'); | |
204 | } | |
205 | ||
4f69f4c2 JK |
206 | /* Invoke the callback function to create the corefile segment. |
207 | Pass MODIFIED as true, we do not know the real modification state. */ | |
208 | func (start, size, read, write, exec, 1, obfd); | |
578c1c03 MK |
209 | } |
210 | ||
578c1c03 MK |
211 | return 0; |
212 | } | |
25268153 | 213 | #endif |
8f60fe01 | 214 | |
92fce24d JB |
215 | /* Fetch the command line for a running process. */ |
216 | ||
217 | static gdb::unique_xmalloc_ptr<char> | |
218 | fbsd_fetch_cmdline (pid_t pid) | |
219 | { | |
220 | size_t len; | |
221 | int mib[4]; | |
222 | ||
223 | len = 0; | |
224 | mib[0] = CTL_KERN; | |
225 | mib[1] = KERN_PROC; | |
226 | mib[2] = KERN_PROC_ARGS; | |
227 | mib[3] = pid; | |
228 | if (sysctl (mib, 4, NULL, &len, NULL, 0) == -1) | |
229 | return nullptr; | |
230 | ||
231 | if (len == 0) | |
232 | return nullptr; | |
233 | ||
234 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) xmalloc (len)); | |
235 | if (sysctl (mib, 4, cmdline.get (), &len, NULL, 0) == -1) | |
236 | return nullptr; | |
237 | ||
424eb552 JB |
238 | /* Join the arguments with spaces to form a single string. */ |
239 | char *cp = cmdline.get (); | |
240 | for (size_t i = 0; i < len - 1; i++) | |
241 | if (cp[i] == '\0') | |
242 | cp[i] = ' '; | |
243 | cp[len - 1] = '\0'; | |
244 | ||
92fce24d JB |
245 | return cmdline; |
246 | } | |
247 | ||
248 | /* Fetch the external variant of the kernel's internal process | |
249 | structure for the process PID into KP. */ | |
250 | ||
251 | static bool | |
252 | fbsd_fetch_kinfo_proc (pid_t pid, struct kinfo_proc *kp) | |
253 | { | |
254 | size_t len; | |
255 | int mib[4]; | |
256 | ||
257 | len = sizeof *kp; | |
258 | mib[0] = CTL_KERN; | |
259 | mib[1] = KERN_PROC; | |
260 | mib[2] = KERN_PROC_PID; | |
261 | mib[3] = pid; | |
262 | return (sysctl (mib, 4, kp, &len, NULL, 0) == 0); | |
263 | } | |
264 | ||
f6ac5f3d | 265 | /* Implement the "info_proc" target_ops method. */ |
92fce24d | 266 | |
f6ac5f3d PA |
267 | bool |
268 | fbsd_nat_target::info_proc (const char *args, enum info_proc_what what) | |
92fce24d JB |
269 | { |
270 | #ifdef HAVE_KINFO_GETFILE | |
271 | gdb::unique_xmalloc_ptr<struct kinfo_file> fdtbl; | |
272 | int nfd = 0; | |
273 | #endif | |
274 | struct kinfo_proc kp; | |
92fce24d JB |
275 | pid_t pid; |
276 | bool do_cmdline = false; | |
277 | bool do_cwd = false; | |
278 | bool do_exe = false; | |
7e69672e JB |
279 | #ifdef HAVE_KINFO_GETFILE |
280 | bool do_files = false; | |
281 | #endif | |
92fce24d JB |
282 | #ifdef HAVE_KINFO_GETVMMAP |
283 | bool do_mappings = false; | |
284 | #endif | |
285 | bool do_status = false; | |
286 | ||
287 | switch (what) | |
288 | { | |
289 | case IP_MINIMAL: | |
290 | do_cmdline = true; | |
291 | do_cwd = true; | |
292 | do_exe = true; | |
293 | break; | |
294 | #ifdef HAVE_KINFO_GETVMMAP | |
295 | case IP_MAPPINGS: | |
296 | do_mappings = true; | |
297 | break; | |
298 | #endif | |
299 | case IP_STATUS: | |
300 | case IP_STAT: | |
301 | do_status = true; | |
302 | break; | |
303 | case IP_CMDLINE: | |
304 | do_cmdline = true; | |
305 | break; | |
306 | case IP_EXE: | |
307 | do_exe = true; | |
308 | break; | |
309 | case IP_CWD: | |
310 | do_cwd = true; | |
311 | break; | |
7e69672e JB |
312 | #ifdef HAVE_KINFO_GETFILE |
313 | case IP_FILES: | |
314 | do_files = true; | |
315 | break; | |
316 | #endif | |
92fce24d JB |
317 | case IP_ALL: |
318 | do_cmdline = true; | |
319 | do_cwd = true; | |
320 | do_exe = true; | |
7e69672e JB |
321 | #ifdef HAVE_KINFO_GETFILE |
322 | do_files = true; | |
323 | #endif | |
92fce24d JB |
324 | #ifdef HAVE_KINFO_GETVMMAP |
325 | do_mappings = true; | |
326 | #endif | |
327 | do_status = true; | |
328 | break; | |
329 | default: | |
330 | error (_("Not supported on this target.")); | |
331 | } | |
332 | ||
333 | gdb_argv built_argv (args); | |
334 | if (built_argv.count () == 0) | |
335 | { | |
e99b03dc | 336 | pid = inferior_ptid.pid (); |
92fce24d JB |
337 | if (pid == 0) |
338 | error (_("No current process: you must name one.")); | |
339 | } | |
340 | else if (built_argv.count () == 1 && isdigit (built_argv[0][0])) | |
341 | pid = strtol (built_argv[0], NULL, 10); | |
342 | else | |
343 | error (_("Invalid arguments.")); | |
344 | ||
345 | printf_filtered (_("process %d\n"), pid); | |
346 | #ifdef HAVE_KINFO_GETFILE | |
7e69672e | 347 | if (do_cwd || do_exe || do_files) |
92fce24d JB |
348 | fdtbl.reset (kinfo_getfile (pid, &nfd)); |
349 | #endif | |
350 | ||
351 | if (do_cmdline) | |
352 | { | |
353 | gdb::unique_xmalloc_ptr<char> cmdline = fbsd_fetch_cmdline (pid); | |
354 | if (cmdline != nullptr) | |
355 | printf_filtered ("cmdline = '%s'\n", cmdline.get ()); | |
356 | else | |
357 | warning (_("unable to fetch command line")); | |
358 | } | |
359 | if (do_cwd) | |
360 | { | |
361 | const char *cwd = NULL; | |
362 | #ifdef HAVE_KINFO_GETFILE | |
363 | struct kinfo_file *kf = fdtbl.get (); | |
364 | for (int i = 0; i < nfd; i++, kf++) | |
365 | { | |
366 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_CWD) | |
367 | { | |
368 | cwd = kf->kf_path; | |
369 | break; | |
370 | } | |
371 | } | |
372 | #endif | |
373 | if (cwd != NULL) | |
374 | printf_filtered ("cwd = '%s'\n", cwd); | |
375 | else | |
376 | warning (_("unable to fetch current working directory")); | |
377 | } | |
378 | if (do_exe) | |
379 | { | |
380 | const char *exe = NULL; | |
381 | #ifdef HAVE_KINFO_GETFILE | |
382 | struct kinfo_file *kf = fdtbl.get (); | |
383 | for (int i = 0; i < nfd; i++, kf++) | |
384 | { | |
385 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_TEXT) | |
386 | { | |
387 | exe = kf->kf_path; | |
388 | break; | |
389 | } | |
390 | } | |
391 | #endif | |
392 | if (exe == NULL) | |
f6ac5f3d | 393 | exe = pid_to_exec_file (pid); |
92fce24d JB |
394 | if (exe != NULL) |
395 | printf_filtered ("exe = '%s'\n", exe); | |
396 | else | |
397 | warning (_("unable to fetch executable path name")); | |
398 | } | |
7e69672e JB |
399 | #ifdef HAVE_KINFO_GETFILE |
400 | if (do_files) | |
401 | { | |
402 | struct kinfo_file *kf = fdtbl.get (); | |
403 | ||
404 | if (nfd > 0) | |
405 | { | |
406 | fbsd_info_proc_files_header (); | |
407 | for (int i = 0; i < nfd; i++, kf++) | |
408 | fbsd_info_proc_files_entry (kf->kf_type, kf->kf_fd, kf->kf_flags, | |
409 | kf->kf_offset, kf->kf_vnode_type, | |
410 | kf->kf_sock_domain, kf->kf_sock_type, | |
411 | kf->kf_sock_protocol, &kf->kf_sa_local, | |
412 | &kf->kf_sa_peer, kf->kf_path); | |
413 | } | |
414 | else | |
415 | warning (_("unable to fetch list of open files")); | |
416 | } | |
417 | #endif | |
92fce24d JB |
418 | #ifdef HAVE_KINFO_GETVMMAP |
419 | if (do_mappings) | |
420 | { | |
421 | int nvment; | |
422 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> | |
423 | vmentl (kinfo_getvmmap (pid, &nvment)); | |
424 | ||
425 | if (vmentl != nullptr) | |
426 | { | |
6f3b1098 JB |
427 | int addr_bit = TARGET_CHAR_BIT * sizeof (void *); |
428 | fbsd_info_proc_mappings_header (addr_bit); | |
92fce24d JB |
429 | |
430 | struct kinfo_vmentry *kve = vmentl.get (); | |
431 | for (int i = 0; i < nvment; i++, kve++) | |
6f3b1098 JB |
432 | fbsd_info_proc_mappings_entry (addr_bit, kve->kve_start, |
433 | kve->kve_end, kve->kve_offset, | |
434 | kve->kve_flags, kve->kve_protection, | |
435 | kve->kve_path); | |
92fce24d JB |
436 | } |
437 | else | |
438 | warning (_("unable to fetch virtual memory map")); | |
439 | } | |
440 | #endif | |
441 | if (do_status) | |
442 | { | |
443 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) | |
444 | warning (_("Failed to fetch process information")); | |
445 | else | |
446 | { | |
447 | const char *state; | |
448 | int pgtok; | |
449 | ||
450 | printf_filtered ("Name: %s\n", kp.ki_comm); | |
451 | switch (kp.ki_stat) | |
452 | { | |
453 | case SIDL: | |
454 | state = "I (idle)"; | |
455 | break; | |
456 | case SRUN: | |
457 | state = "R (running)"; | |
458 | break; | |
459 | case SSTOP: | |
460 | state = "T (stopped)"; | |
461 | break; | |
462 | case SZOMB: | |
463 | state = "Z (zombie)"; | |
464 | break; | |
465 | case SSLEEP: | |
466 | state = "S (sleeping)"; | |
467 | break; | |
468 | case SWAIT: | |
469 | state = "W (interrupt wait)"; | |
470 | break; | |
471 | case SLOCK: | |
472 | state = "L (blocked on lock)"; | |
473 | break; | |
474 | default: | |
475 | state = "? (unknown)"; | |
476 | break; | |
477 | } | |
478 | printf_filtered ("State: %s\n", state); | |
479 | printf_filtered ("Parent process: %d\n", kp.ki_ppid); | |
480 | printf_filtered ("Process group: %d\n", kp.ki_pgid); | |
481 | printf_filtered ("Session id: %d\n", kp.ki_sid); | |
482 | printf_filtered ("TTY: %ju\n", (uintmax_t) kp.ki_tdev); | |
483 | printf_filtered ("TTY owner process group: %d\n", kp.ki_tpgid); | |
484 | printf_filtered ("User IDs (real, effective, saved): %d %d %d\n", | |
485 | kp.ki_ruid, kp.ki_uid, kp.ki_svuid); | |
486 | printf_filtered ("Group IDs (real, effective, saved): %d %d %d\n", | |
487 | kp.ki_rgid, kp.ki_groups[0], kp.ki_svgid); | |
488 | printf_filtered ("Groups: "); | |
489 | for (int i = 0; i < kp.ki_ngroups; i++) | |
490 | printf_filtered ("%d ", kp.ki_groups[i]); | |
491 | printf_filtered ("\n"); | |
492 | printf_filtered ("Minor faults (no memory page): %ld\n", | |
493 | kp.ki_rusage.ru_minflt); | |
494 | printf_filtered ("Minor faults, children: %ld\n", | |
495 | kp.ki_rusage_ch.ru_minflt); | |
496 | printf_filtered ("Major faults (memory page faults): %ld\n", | |
497 | kp.ki_rusage.ru_majflt); | |
498 | printf_filtered ("Major faults, children: %ld\n", | |
499 | kp.ki_rusage_ch.ru_majflt); | |
500 | printf_filtered ("utime: %jd.%06ld\n", | |
501 | (intmax_t) kp.ki_rusage.ru_utime.tv_sec, | |
502 | kp.ki_rusage.ru_utime.tv_usec); | |
503 | printf_filtered ("stime: %jd.%06ld\n", | |
504 | (intmax_t) kp.ki_rusage.ru_stime.tv_sec, | |
505 | kp.ki_rusage.ru_stime.tv_usec); | |
506 | printf_filtered ("utime, children: %jd.%06ld\n", | |
507 | (intmax_t) kp.ki_rusage_ch.ru_utime.tv_sec, | |
508 | kp.ki_rusage_ch.ru_utime.tv_usec); | |
509 | printf_filtered ("stime, children: %jd.%06ld\n", | |
510 | (intmax_t) kp.ki_rusage_ch.ru_stime.tv_sec, | |
511 | kp.ki_rusage_ch.ru_stime.tv_usec); | |
512 | printf_filtered ("'nice' value: %d\n", kp.ki_nice); | |
513 | printf_filtered ("Start time: %jd.%06ld\n", kp.ki_start.tv_sec, | |
514 | kp.ki_start.tv_usec); | |
515 | pgtok = getpagesize () / 1024; | |
516 | printf_filtered ("Virtual memory size: %ju kB\n", | |
517 | (uintmax_t) kp.ki_size / 1024); | |
518 | printf_filtered ("Data size: %ju kB\n", | |
519 | (uintmax_t) kp.ki_dsize * pgtok); | |
520 | printf_filtered ("Stack size: %ju kB\n", | |
521 | (uintmax_t) kp.ki_ssize * pgtok); | |
522 | printf_filtered ("Text size: %ju kB\n", | |
523 | (uintmax_t) kp.ki_tsize * pgtok); | |
524 | printf_filtered ("Resident set size: %ju kB\n", | |
525 | (uintmax_t) kp.ki_rssize * pgtok); | |
526 | printf_filtered ("Maximum RSS: %ju kB\n", | |
527 | (uintmax_t) kp.ki_rusage.ru_maxrss); | |
528 | printf_filtered ("Pending Signals: "); | |
529 | for (int i = 0; i < _SIG_WORDS; i++) | |
530 | printf_filtered ("%08x ", kp.ki_siglist.__bits[i]); | |
531 | printf_filtered ("\n"); | |
532 | printf_filtered ("Ignored Signals: "); | |
533 | for (int i = 0; i < _SIG_WORDS; i++) | |
534 | printf_filtered ("%08x ", kp.ki_sigignore.__bits[i]); | |
535 | printf_filtered ("\n"); | |
536 | printf_filtered ("Caught Signals: "); | |
537 | for (int i = 0; i < _SIG_WORDS; i++) | |
538 | printf_filtered ("%08x ", kp.ki_sigcatch.__bits[i]); | |
539 | printf_filtered ("\n"); | |
540 | } | |
541 | } | |
f6ac5f3d PA |
542 | |
543 | return true; | |
92fce24d JB |
544 | } |
545 | ||
f8eb6a9e JB |
546 | /* |
547 | * The current layout of siginfo_t on FreeBSD was adopted in SVN | |
548 | * revision 153154 which shipped in FreeBSD versions 7.0 and later. | |
549 | * Don't bother supporting the older layout on older kernels. The | |
550 | * older format was also never used in core dump notes. | |
551 | */ | |
552 | #if __FreeBSD_version >= 700009 | |
553 | #define USE_SIGINFO | |
554 | #endif | |
7697fc9e | 555 | |
f8eb6a9e | 556 | #ifdef USE_SIGINFO |
929edea9 JB |
557 | /* Return the size of siginfo for the current inferior. */ |
558 | ||
559 | #ifdef __LP64__ | |
560 | union sigval32 { | |
561 | int sival_int; | |
562 | uint32_t sival_ptr; | |
563 | }; | |
564 | ||
565 | /* This structure matches the naming and layout of `siginfo_t' in | |
566 | <sys/signal.h>. In particular, the `si_foo' macros defined in that | |
567 | header can be used with both types to copy fields in the `_reason' | |
568 | union. */ | |
569 | ||
570 | struct siginfo32 | |
571 | { | |
572 | int si_signo; | |
573 | int si_errno; | |
574 | int si_code; | |
575 | __pid_t si_pid; | |
576 | __uid_t si_uid; | |
577 | int si_status; | |
578 | uint32_t si_addr; | |
579 | union sigval32 si_value; | |
580 | union | |
581 | { | |
582 | struct | |
583 | { | |
584 | int _trapno; | |
585 | } _fault; | |
586 | struct | |
587 | { | |
588 | int _timerid; | |
589 | int _overrun; | |
590 | } _timer; | |
591 | struct | |
592 | { | |
593 | int _mqd; | |
594 | } _mesgq; | |
595 | struct | |
596 | { | |
597 | int32_t _band; | |
598 | } _poll; | |
599 | struct | |
600 | { | |
601 | int32_t __spare1__; | |
602 | int __spare2__[7]; | |
603 | } __spare__; | |
604 | } _reason; | |
605 | }; | |
606 | #endif | |
607 | ||
608 | static size_t | |
609 | fbsd_siginfo_size () | |
610 | { | |
611 | #ifdef __LP64__ | |
612 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
613 | ||
614 | /* Is the inferior 32-bit? If so, use the 32-bit siginfo size. */ | |
a181c0bf | 615 | if (gdbarch_long_bit (gdbarch) == 32) |
929edea9 JB |
616 | return sizeof (struct siginfo32); |
617 | #endif | |
618 | return sizeof (siginfo_t); | |
619 | } | |
620 | ||
621 | /* Convert a native 64-bit siginfo object to a 32-bit object. Note | |
622 | that FreeBSD doesn't support writing to $_siginfo, so this only | |
623 | needs to convert one way. */ | |
624 | ||
625 | static void | |
626 | fbsd_convert_siginfo (siginfo_t *si) | |
627 | { | |
628 | #ifdef __LP64__ | |
629 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
630 | ||
631 | /* Is the inferior 32-bit? If not, nothing to do. */ | |
a181c0bf | 632 | if (gdbarch_long_bit (gdbarch) != 32) |
929edea9 JB |
633 | return; |
634 | ||
635 | struct siginfo32 si32; | |
636 | ||
637 | si32.si_signo = si->si_signo; | |
638 | si32.si_errno = si->si_errno; | |
639 | si32.si_code = si->si_code; | |
640 | si32.si_pid = si->si_pid; | |
641 | si32.si_uid = si->si_uid; | |
642 | si32.si_status = si->si_status; | |
643 | si32.si_addr = (uintptr_t) si->si_addr; | |
644 | ||
645 | /* If sival_ptr is being used instead of sival_int on a big-endian | |
646 | platform, then sival_int will be zero since it holds the upper | |
647 | 32-bits of the pointer value. */ | |
648 | #if _BYTE_ORDER == _BIG_ENDIAN | |
649 | if (si->si_value.sival_int == 0) | |
0335ac6d | 650 | si32.si_value.sival_ptr = (uintptr_t) si->si_value.sival_ptr; |
929edea9 JB |
651 | else |
652 | si32.si_value.sival_int = si->si_value.sival_int; | |
653 | #else | |
654 | si32.si_value.sival_int = si->si_value.sival_int; | |
655 | #endif | |
656 | ||
657 | /* Always copy the spare fields and then possibly overwrite them for | |
658 | signal-specific or code-specific fields. */ | |
659 | si32._reason.__spare__.__spare1__ = si->_reason.__spare__.__spare1__; | |
660 | for (int i = 0; i < 7; i++) | |
661 | si32._reason.__spare__.__spare2__[i] = si->_reason.__spare__.__spare2__[i]; | |
662 | switch (si->si_signo) { | |
663 | case SIGILL: | |
664 | case SIGFPE: | |
665 | case SIGSEGV: | |
666 | case SIGBUS: | |
667 | si32.si_trapno = si->si_trapno; | |
668 | break; | |
669 | } | |
670 | switch (si->si_code) { | |
671 | case SI_TIMER: | |
672 | si32.si_timerid = si->si_timerid; | |
673 | si32.si_overrun = si->si_overrun; | |
674 | break; | |
675 | case SI_MESGQ: | |
676 | si32.si_mqd = si->si_mqd; | |
677 | break; | |
678 | } | |
679 | ||
680 | memcpy(si, &si32, sizeof (si32)); | |
681 | #endif | |
682 | } | |
683 | #endif | |
684 | ||
f6ac5f3d | 685 | /* Implement the "xfer_partial" target_ops method. */ |
7697fc9e | 686 | |
f6ac5f3d PA |
687 | enum target_xfer_status |
688 | fbsd_nat_target::xfer_partial (enum target_object object, | |
689 | const char *annex, gdb_byte *readbuf, | |
690 | const gdb_byte *writebuf, | |
691 | ULONGEST offset, ULONGEST len, | |
692 | ULONGEST *xfered_len) | |
7697fc9e | 693 | { |
e99b03dc | 694 | pid_t pid = inferior_ptid.pid (); |
7697fc9e JB |
695 | |
696 | switch (object) | |
697 | { | |
f8eb6a9e | 698 | #ifdef USE_SIGINFO |
929edea9 JB |
699 | case TARGET_OBJECT_SIGNAL_INFO: |
700 | { | |
701 | struct ptrace_lwpinfo pl; | |
702 | size_t siginfo_size; | |
703 | ||
704 | /* FreeBSD doesn't support writing to $_siginfo. */ | |
705 | if (writebuf != NULL) | |
706 | return TARGET_XFER_E_IO; | |
707 | ||
708 | if (inferior_ptid.lwp_p ()) | |
709 | pid = inferior_ptid.lwp (); | |
710 | ||
711 | siginfo_size = fbsd_siginfo_size (); | |
712 | if (offset > siginfo_size) | |
713 | return TARGET_XFER_E_IO; | |
714 | ||
715 | if (ptrace (PT_LWPINFO, pid, (PTRACE_TYPE_ARG3) &pl, sizeof (pl)) == -1) | |
716 | return TARGET_XFER_E_IO; | |
717 | ||
718 | if (!(pl.pl_flags & PL_FLAG_SI)) | |
719 | return TARGET_XFER_E_IO; | |
720 | ||
721 | fbsd_convert_siginfo (&pl.pl_siginfo); | |
722 | if (offset + len > siginfo_size) | |
723 | len = siginfo_size - offset; | |
724 | ||
725 | memcpy (readbuf, ((gdb_byte *) &pl.pl_siginfo) + offset, len); | |
726 | *xfered_len = len; | |
727 | return TARGET_XFER_OK; | |
728 | } | |
729 | #endif | |
f8eb6a9e | 730 | #ifdef KERN_PROC_AUXV |
7697fc9e JB |
731 | case TARGET_OBJECT_AUXV: |
732 | { | |
e4a26669 JB |
733 | gdb::byte_vector buf_storage; |
734 | gdb_byte *buf; | |
7697fc9e JB |
735 | size_t buflen; |
736 | int mib[4]; | |
737 | ||
738 | if (writebuf != NULL) | |
739 | return TARGET_XFER_E_IO; | |
740 | mib[0] = CTL_KERN; | |
741 | mib[1] = KERN_PROC; | |
742 | mib[2] = KERN_PROC_AUXV; | |
743 | mib[3] = pid; | |
744 | if (offset == 0) | |
745 | { | |
746 | buf = readbuf; | |
747 | buflen = len; | |
748 | } | |
749 | else | |
750 | { | |
751 | buflen = offset + len; | |
e4a26669 JB |
752 | buf_storage.resize (buflen); |
753 | buf = buf_storage.data (); | |
7697fc9e JB |
754 | } |
755 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
756 | { | |
757 | if (offset != 0) | |
758 | { | |
759 | if (buflen > offset) | |
760 | { | |
761 | buflen -= offset; | |
762 | memcpy (readbuf, buf + offset, buflen); | |
763 | } | |
764 | else | |
765 | buflen = 0; | |
766 | } | |
7697fc9e JB |
767 | *xfered_len = buflen; |
768 | return (buflen == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
769 | } | |
7697fc9e JB |
770 | return TARGET_XFER_E_IO; |
771 | } | |
f8eb6a9e JB |
772 | #endif |
773 | #if defined(KERN_PROC_VMMAP) && defined(KERN_PROC_PS_STRINGS) | |
739ab2e9 SS |
774 | case TARGET_OBJECT_FREEBSD_VMMAP: |
775 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
776 | { | |
777 | gdb::byte_vector buf_storage; | |
778 | gdb_byte *buf; | |
779 | size_t buflen; | |
780 | int mib[4]; | |
781 | ||
782 | int proc_target; | |
783 | uint32_t struct_size; | |
784 | switch (object) | |
785 | { | |
786 | case TARGET_OBJECT_FREEBSD_VMMAP: | |
787 | proc_target = KERN_PROC_VMMAP; | |
788 | struct_size = sizeof (struct kinfo_vmentry); | |
789 | break; | |
790 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
791 | proc_target = KERN_PROC_PS_STRINGS; | |
792 | struct_size = sizeof (void *); | |
793 | break; | |
794 | } | |
795 | ||
796 | if (writebuf != NULL) | |
797 | return TARGET_XFER_E_IO; | |
798 | ||
799 | mib[0] = CTL_KERN; | |
800 | mib[1] = KERN_PROC; | |
801 | mib[2] = proc_target; | |
802 | mib[3] = pid; | |
803 | ||
804 | if (sysctl (mib, 4, NULL, &buflen, NULL, 0) != 0) | |
805 | return TARGET_XFER_E_IO; | |
806 | buflen += sizeof (struct_size); | |
807 | ||
808 | if (offset >= buflen) | |
809 | { | |
810 | *xfered_len = 0; | |
811 | return TARGET_XFER_EOF; | |
812 | } | |
813 | ||
814 | buf_storage.resize (buflen); | |
815 | buf = buf_storage.data (); | |
816 | ||
817 | memcpy (buf, &struct_size, sizeof (struct_size)); | |
818 | buflen -= sizeof (struct_size); | |
819 | if (sysctl (mib, 4, buf + sizeof (struct_size), &buflen, NULL, 0) != 0) | |
820 | return TARGET_XFER_E_IO; | |
821 | buflen += sizeof (struct_size); | |
822 | ||
823 | if (buflen - offset < len) | |
824 | len = buflen - offset; | |
825 | memcpy (readbuf, buf + offset, len); | |
826 | *xfered_len = len; | |
827 | return TARGET_XFER_OK; | |
828 | } | |
f8eb6a9e | 829 | #endif |
7697fc9e | 830 | default: |
f6ac5f3d PA |
831 | return inf_ptrace_target::xfer_partial (object, annex, |
832 | readbuf, writebuf, offset, | |
833 | len, xfered_len); | |
7697fc9e JB |
834 | } |
835 | } | |
7697fc9e | 836 | |
e58e05d6 | 837 | #ifdef PT_LWPINFO |
6e9567fe | 838 | static int debug_fbsd_lwp; |
386a8676 | 839 | static int debug_fbsd_nat; |
6e9567fe | 840 | |
6e9567fe JB |
841 | static void |
842 | show_fbsd_lwp_debug (struct ui_file *file, int from_tty, | |
843 | struct cmd_list_element *c, const char *value) | |
844 | { | |
845 | fprintf_filtered (file, _("Debugging of FreeBSD lwp module is %s.\n"), value); | |
846 | } | |
847 | ||
386a8676 JB |
848 | static void |
849 | show_fbsd_nat_debug (struct ui_file *file, int from_tty, | |
850 | struct cmd_list_element *c, const char *value) | |
851 | { | |
852 | fprintf_filtered (file, _("Debugging of FreeBSD native target is %s.\n"), | |
853 | value); | |
854 | } | |
855 | ||
6e9567fe JB |
856 | /* |
857 | FreeBSD's first thread support was via a "reentrant" version of libc | |
858 | (libc_r) that first shipped in 2.2.7. This library multiplexed all | |
859 | of the threads in a process onto a single kernel thread. This | |
4c7bf4f9 | 860 | library was supported via the bsd-uthread target. |
6e9567fe JB |
861 | |
862 | FreeBSD 5.1 introduced two new threading libraries that made use of | |
863 | multiple kernel threads. The first (libkse) scheduled M user | |
864 | threads onto N (<= M) kernel threads (LWPs). The second (libthr) | |
865 | bound each user thread to a dedicated kernel thread. libkse shipped | |
866 | as the default threading library (libpthread). | |
867 | ||
868 | FreeBSD 5.3 added a libthread_db to abstract the interface across | |
869 | the various thread libraries (libc_r, libkse, and libthr). | |
870 | ||
871 | FreeBSD 7.0 switched the default threading library from from libkse | |
872 | to libpthread and removed libc_r. | |
873 | ||
874 | FreeBSD 8.0 removed libkse and the in-kernel support for it. The | |
875 | only threading library supported by 8.0 and later is libthr which | |
876 | ties each user thread directly to an LWP. To simplify the | |
877 | implementation, this target only supports LWP-backed threads using | |
878 | ptrace directly rather than libthread_db. | |
879 | ||
880 | FreeBSD 11.0 introduced LWP event reporting via PT_LWP_EVENTS. | |
881 | */ | |
882 | ||
883 | /* Return true if PTID is still active in the inferior. */ | |
884 | ||
57810aa7 | 885 | bool |
f6ac5f3d | 886 | fbsd_nat_target::thread_alive (ptid_t ptid) |
6e9567fe | 887 | { |
15a9e13e | 888 | if (ptid.lwp_p ()) |
6e9567fe JB |
889 | { |
890 | struct ptrace_lwpinfo pl; | |
891 | ||
e38504b3 | 892 | if (ptrace (PT_LWPINFO, ptid.lwp (), (caddr_t) &pl, sizeof pl) |
6e9567fe | 893 | == -1) |
57810aa7 | 894 | return false; |
6e9567fe JB |
895 | #ifdef PL_FLAG_EXITED |
896 | if (pl.pl_flags & PL_FLAG_EXITED) | |
57810aa7 | 897 | return false; |
6e9567fe JB |
898 | #endif |
899 | } | |
900 | ||
57810aa7 | 901 | return true; |
6e9567fe JB |
902 | } |
903 | ||
a068643d | 904 | /* Convert PTID to a string. */ |
6e9567fe | 905 | |
a068643d | 906 | std::string |
f6ac5f3d | 907 | fbsd_nat_target::pid_to_str (ptid_t ptid) |
6e9567fe JB |
908 | { |
909 | lwpid_t lwp; | |
910 | ||
e38504b3 | 911 | lwp = ptid.lwp (); |
6e9567fe JB |
912 | if (lwp != 0) |
913 | { | |
e99b03dc | 914 | int pid = ptid.pid (); |
6e9567fe | 915 | |
a068643d | 916 | return string_printf ("LWP %d of process %d", lwp, pid); |
6e9567fe JB |
917 | } |
918 | ||
919 | return normal_pid_to_str (ptid); | |
920 | } | |
921 | ||
922 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
923 | /* Return the name assigned to a thread by an application. Returns | |
924 | the string in a static buffer. */ | |
925 | ||
f6ac5f3d PA |
926 | const char * |
927 | fbsd_nat_target::thread_name (struct thread_info *thr) | |
6e9567fe JB |
928 | { |
929 | struct ptrace_lwpinfo pl; | |
930 | struct kinfo_proc kp; | |
e99b03dc | 931 | int pid = thr->ptid.pid (); |
e38504b3 | 932 | long lwp = thr->ptid.lwp (); |
6e9567fe JB |
933 | static char buf[sizeof pl.pl_tdname + 1]; |
934 | ||
935 | /* Note that ptrace_lwpinfo returns the process command in pl_tdname | |
936 | if a name has not been set explicitly. Return a NULL name in | |
937 | that case. */ | |
92fce24d JB |
938 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) |
939 | perror_with_name (_("Failed to fetch process information")); | |
6e9567fe JB |
940 | if (ptrace (PT_LWPINFO, lwp, (caddr_t) &pl, sizeof pl) == -1) |
941 | perror_with_name (("ptrace")); | |
942 | if (strcmp (kp.ki_comm, pl.pl_tdname) == 0) | |
943 | return NULL; | |
944 | xsnprintf (buf, sizeof buf, "%s", pl.pl_tdname); | |
945 | return buf; | |
946 | } | |
947 | #endif | |
948 | ||
da95a26c | 949 | /* Enable additional event reporting on new processes. |
6e9567fe | 950 | |
da95a26c JB |
951 | To catch fork events, PTRACE_FORK is set on every traced process |
952 | to enable stops on returns from fork or vfork. Note that both the | |
953 | parent and child will always stop, even if system call stops are | |
954 | not enabled. | |
955 | ||
956 | To catch LWP events, PTRACE_EVENTS is set on every traced process. | |
6e9567fe JB |
957 | This enables stops on the birth for new LWPs (excluding the "main" LWP) |
958 | and the death of LWPs (excluding the last LWP in a process). Note | |
959 | that unlike fork events, the LWP that creates a new LWP does not | |
960 | report an event. */ | |
961 | ||
962 | static void | |
da95a26c | 963 | fbsd_enable_proc_events (pid_t pid) |
6e9567fe | 964 | { |
da95a26c JB |
965 | #ifdef PT_GET_EVENT_MASK |
966 | int events; | |
967 | ||
968 | if (ptrace (PT_GET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, | |
969 | sizeof (events)) == -1) | |
970 | perror_with_name (("ptrace")); | |
971 | events |= PTRACE_FORK | PTRACE_LWP; | |
dbaed385 JB |
972 | #ifdef PTRACE_VFORK |
973 | events |= PTRACE_VFORK; | |
974 | #endif | |
da95a26c JB |
975 | if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, |
976 | sizeof (events)) == -1) | |
977 | perror_with_name (("ptrace")); | |
978 | #else | |
979 | #ifdef TDP_RFPPWAIT | |
980 | if (ptrace (PT_FOLLOW_FORK, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) | |
981 | perror_with_name (("ptrace")); | |
982 | #endif | |
983 | #ifdef PT_LWP_EVENTS | |
6e9567fe JB |
984 | if (ptrace (PT_LWP_EVENTS, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) |
985 | perror_with_name (("ptrace")); | |
6e9567fe | 986 | #endif |
da95a26c JB |
987 | #endif |
988 | } | |
6e9567fe JB |
989 | |
990 | /* Add threads for any new LWPs in a process. | |
991 | ||
992 | When LWP events are used, this function is only used to detect existing | |
993 | threads when attaching to a process. On older systems, this function is | |
994 | called to discover new threads each time the thread list is updated. */ | |
995 | ||
996 | static void | |
997 | fbsd_add_threads (pid_t pid) | |
998 | { | |
6e9567fe JB |
999 | int i, nlwps; |
1000 | ||
f2907e49 | 1001 | gdb_assert (!in_thread_list (ptid_t (pid))); |
6e9567fe JB |
1002 | nlwps = ptrace (PT_GETNUMLWPS, pid, NULL, 0); |
1003 | if (nlwps == -1) | |
1004 | perror_with_name (("ptrace")); | |
1005 | ||
329d5e7e | 1006 | gdb::unique_xmalloc_ptr<lwpid_t[]> lwps (XCNEWVEC (lwpid_t, nlwps)); |
6e9567fe | 1007 | |
e4a26669 | 1008 | nlwps = ptrace (PT_GETLWPLIST, pid, (caddr_t) lwps.get (), nlwps); |
6e9567fe JB |
1009 | if (nlwps == -1) |
1010 | perror_with_name (("ptrace")); | |
1011 | ||
1012 | for (i = 0; i < nlwps; i++) | |
1013 | { | |
fd79271b | 1014 | ptid_t ptid = ptid_t (pid, lwps[i], 0); |
6e9567fe JB |
1015 | |
1016 | if (!in_thread_list (ptid)) | |
1017 | { | |
1018 | #ifdef PT_LWP_EVENTS | |
1019 | struct ptrace_lwpinfo pl; | |
1020 | ||
1021 | /* Don't add exited threads. Note that this is only called | |
1022 | when attaching to a multi-threaded process. */ | |
329d5e7e | 1023 | if (ptrace (PT_LWPINFO, lwps[i], (caddr_t) &pl, sizeof pl) == -1) |
6e9567fe JB |
1024 | perror_with_name (("ptrace")); |
1025 | if (pl.pl_flags & PL_FLAG_EXITED) | |
1026 | continue; | |
1027 | #endif | |
1028 | if (debug_fbsd_lwp) | |
1029 | fprintf_unfiltered (gdb_stdlog, | |
1030 | "FLWP: adding thread for LWP %u\n", | |
329d5e7e | 1031 | lwps[i]); |
6e9567fe JB |
1032 | add_thread (ptid); |
1033 | } | |
1034 | } | |
6e9567fe JB |
1035 | } |
1036 | ||
f6ac5f3d | 1037 | /* Implement the "update_thread_list" target_ops method. */ |
6e9567fe | 1038 | |
f6ac5f3d PA |
1039 | void |
1040 | fbsd_nat_target::update_thread_list () | |
6e9567fe JB |
1041 | { |
1042 | #ifdef PT_LWP_EVENTS | |
1043 | /* With support for thread events, threads are added/deleted from the | |
1044 | list as events are reported, so just try deleting exited threads. */ | |
1045 | delete_exited_threads (); | |
1046 | #else | |
1047 | prune_threads (); | |
1048 | ||
e99b03dc | 1049 | fbsd_add_threads (inferior_ptid.pid ()); |
6e9567fe JB |
1050 | #endif |
1051 | } | |
1052 | ||
e58e05d6 JB |
1053 | #ifdef TDP_RFPPWAIT |
1054 | /* | |
1055 | To catch fork events, PT_FOLLOW_FORK is set on every traced process | |
1056 | to enable stops on returns from fork or vfork. Note that both the | |
1057 | parent and child will always stop, even if system call stops are not | |
1058 | enabled. | |
1059 | ||
1060 | After a fork, both the child and parent process will stop and report | |
1061 | an event. However, there is no guarantee of order. If the parent | |
1062 | reports its stop first, then fbsd_wait explicitly waits for the new | |
1063 | child before returning. If the child reports its stop first, then | |
1064 | the event is saved on a list and ignored until the parent's stop is | |
1065 | reported. fbsd_wait could have been changed to fetch the parent PID | |
1066 | of the new child and used that to wait for the parent explicitly. | |
1067 | However, if two threads in the parent fork at the same time, then | |
1068 | the wait on the parent might return the "wrong" fork event. | |
1069 | ||
1070 | The initial version of PT_FOLLOW_FORK did not set PL_FLAG_CHILD for | |
1071 | the new child process. This flag could be inferred by treating any | |
1072 | events for an unknown pid as a new child. | |
1073 | ||
1074 | In addition, the initial version of PT_FOLLOW_FORK did not report a | |
1075 | stop event for the parent process of a vfork until after the child | |
1076 | process executed a new program or exited. The kernel was changed to | |
1077 | defer the wait for exit or exec of the child until after posting the | |
1078 | stop event shortly after the change to introduce PL_FLAG_CHILD. | |
1079 | This could be worked around by reporting a vfork event when the | |
1080 | child event posted and ignoring the subsequent event from the | |
1081 | parent. | |
1082 | ||
1083 | This implementation requires both of these fixes for simplicity's | |
1084 | sake. FreeBSD versions newer than 9.1 contain both fixes. | |
1085 | */ | |
1086 | ||
e8c6b620 | 1087 | static std::list<ptid_t> fbsd_pending_children; |
e58e05d6 JB |
1088 | |
1089 | /* Record a new child process event that is reported before the | |
1090 | corresponding fork event in the parent. */ | |
1091 | ||
1092 | static void | |
6e9567fe | 1093 | fbsd_remember_child (ptid_t pid) |
e58e05d6 | 1094 | { |
e8c6b620 | 1095 | fbsd_pending_children.push_front (pid); |
e58e05d6 JB |
1096 | } |
1097 | ||
1098 | /* Check for a previously-recorded new child process event for PID. | |
6e9567fe | 1099 | If one is found, remove it from the list and return the PTID. */ |
e58e05d6 | 1100 | |
6e9567fe | 1101 | static ptid_t |
e58e05d6 JB |
1102 | fbsd_is_child_pending (pid_t pid) |
1103 | { | |
e8c6b620 JB |
1104 | for (auto it = fbsd_pending_children.begin (); |
1105 | it != fbsd_pending_children.end (); it++) | |
1106 | if (it->pid () == pid) | |
1107 | { | |
1108 | ptid_t ptid = *it; | |
1109 | fbsd_pending_children.erase (it); | |
1110 | return ptid; | |
1111 | } | |
6e9567fe | 1112 | return null_ptid; |
e58e05d6 | 1113 | } |
2c5c2a33 | 1114 | |
dbaed385 | 1115 | #ifndef PTRACE_VFORK |
e8c6b620 | 1116 | static std::forward_list<ptid_t> fbsd_pending_vfork_done; |
2c5c2a33 JB |
1117 | |
1118 | /* Record a pending vfork done event. */ | |
1119 | ||
1120 | static void | |
1121 | fbsd_add_vfork_done (ptid_t pid) | |
1122 | { | |
e8c6b620 | 1123 | fbsd_pending_vfork_done.push_front (pid); |
2c5c2a33 JB |
1124 | } |
1125 | ||
1126 | /* Check for a pending vfork done event for a specific PID. */ | |
1127 | ||
1128 | static int | |
1129 | fbsd_is_vfork_done_pending (pid_t pid) | |
1130 | { | |
e8c6b620 JB |
1131 | for (auto it = fbsd_pending_vfork_done.begin (); |
1132 | it != fbsd_pending_vfork_done.end (); it++) | |
1133 | if (it->pid () == pid) | |
1134 | return 1; | |
2c5c2a33 JB |
1135 | return 0; |
1136 | } | |
1137 | ||
1138 | /* Check for a pending vfork done event. If one is found, remove it | |
1139 | from the list and return the PTID. */ | |
1140 | ||
ee950322 | 1141 | static ptid_t |
2c5c2a33 JB |
1142 | fbsd_next_vfork_done (void) |
1143 | { | |
e8c6b620 | 1144 | if (!fbsd_pending_vfork_done.empty ()) |
2c5c2a33 | 1145 | { |
e8c6b620 JB |
1146 | ptid_t ptid = fbsd_pending_vfork_done.front (); |
1147 | fbsd_pending_vfork_done.pop_front (); | |
2c5c2a33 JB |
1148 | return ptid; |
1149 | } | |
1150 | return null_ptid; | |
1151 | } | |
e58e05d6 | 1152 | #endif |
dbaed385 | 1153 | #endif |
e58e05d6 | 1154 | |
f6ac5f3d | 1155 | /* Implement the "resume" target_ops method. */ |
8607ea63 | 1156 | |
f6ac5f3d PA |
1157 | void |
1158 | fbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
8607ea63 | 1159 | { |
dbaed385 | 1160 | #if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK) |
2c5c2a33 JB |
1161 | pid_t pid; |
1162 | ||
1163 | /* Don't PT_CONTINUE a process which has a pending vfork done event. */ | |
d7e15655 | 1164 | if (minus_one_ptid == ptid) |
e99b03dc | 1165 | pid = inferior_ptid.pid (); |
2c5c2a33 | 1166 | else |
e99b03dc | 1167 | pid = ptid.pid (); |
2c5c2a33 JB |
1168 | if (fbsd_is_vfork_done_pending (pid)) |
1169 | return; | |
1170 | #endif | |
8607ea63 JB |
1171 | |
1172 | if (debug_fbsd_lwp) | |
1173 | fprintf_unfiltered (gdb_stdlog, | |
1174 | "FLWP: fbsd_resume for ptid (%d, %ld, %ld)\n", | |
e38504b3 | 1175 | ptid.pid (), ptid.lwp (), |
cc6bcb54 | 1176 | ptid.tid ()); |
15a9e13e | 1177 | if (ptid.lwp_p ()) |
8607ea63 JB |
1178 | { |
1179 | /* If ptid is a specific LWP, suspend all other LWPs in the process. */ | |
08036331 | 1180 | inferior *inf = find_inferior_ptid (ptid); |
d56060f0 | 1181 | |
08036331 | 1182 | for (thread_info *tp : inf->non_exited_threads ()) |
d56060f0 | 1183 | { |
08036331 | 1184 | int request; |
d56060f0 | 1185 | |
e38504b3 | 1186 | if (tp->ptid.lwp () == ptid.lwp ()) |
d56060f0 JB |
1187 | request = PT_RESUME; |
1188 | else | |
1189 | request = PT_SUSPEND; | |
1190 | ||
e38504b3 | 1191 | if (ptrace (request, tp->ptid.lwp (), NULL, 0) == -1) |
d56060f0 JB |
1192 | perror_with_name (("ptrace")); |
1193 | } | |
8607ea63 JB |
1194 | } |
1195 | else | |
1196 | { | |
1197 | /* If ptid is a wildcard, resume all matching threads (they won't run | |
1198 | until the process is continued however). */ | |
08036331 PA |
1199 | for (thread_info *tp : all_non_exited_threads (ptid)) |
1200 | if (ptrace (PT_RESUME, tp->ptid.lwp (), NULL, 0) == -1) | |
1201 | perror_with_name (("ptrace")); | |
8607ea63 JB |
1202 | ptid = inferior_ptid; |
1203 | } | |
f169cfdc JB |
1204 | |
1205 | #if __FreeBSD_version < 1200052 | |
1206 | /* When multiple threads within a process wish to report STOPPED | |
1207 | events from wait(), the kernel picks one thread event as the | |
1208 | thread event to report. The chosen thread event is retrieved via | |
1209 | PT_LWPINFO by passing the process ID as the request pid. If | |
1210 | multiple events are pending, then the subsequent wait() after | |
1211 | resuming a process will report another STOPPED event after | |
1212 | resuming the process to handle the next thread event and so on. | |
1213 | ||
1214 | A single thread event is cleared as a side effect of resuming the | |
1215 | process with PT_CONTINUE, PT_STEP, etc. In older kernels, | |
1216 | however, the request pid was used to select which thread's event | |
1217 | was cleared rather than always clearing the event that was just | |
1218 | reported. To avoid clearing the event of the wrong LWP, always | |
1219 | pass the process ID instead of an LWP ID to PT_CONTINUE or | |
1220 | PT_SYSCALL. | |
1221 | ||
1222 | In the case of stepping, the process ID cannot be used with | |
1223 | PT_STEP since it would step the thread that reported an event | |
1224 | which may not be the thread indicated by PTID. For stepping, use | |
1225 | PT_SETSTEP to enable stepping on the desired thread before | |
1226 | resuming the process via PT_CONTINUE instead of using | |
1227 | PT_STEP. */ | |
1228 | if (step) | |
1229 | { | |
1230 | if (ptrace (PT_SETSTEP, get_ptrace_pid (ptid), NULL, 0) == -1) | |
1231 | perror_with_name (("ptrace")); | |
1232 | step = 0; | |
1233 | } | |
1234 | ptid = ptid_t (ptid.pid ()); | |
1235 | #endif | |
f6ac5f3d | 1236 | inf_ptrace_target::resume (ptid, step, signo); |
8607ea63 JB |
1237 | } |
1238 | ||
7efba073 JB |
1239 | #ifdef USE_SIGTRAP_SIGINFO |
1240 | /* Handle breakpoint and trace traps reported via SIGTRAP. If the | |
1241 | trap was a breakpoint or trace trap that should be reported to the | |
1242 | core, return true. */ | |
1243 | ||
1244 | static bool | |
f6ac5f3d | 1245 | fbsd_handle_debug_trap (ptid_t ptid, const struct ptrace_lwpinfo &pl) |
7efba073 JB |
1246 | { |
1247 | ||
1248 | /* Ignore traps without valid siginfo or for signals other than | |
6d78332e JB |
1249 | SIGTRAP. |
1250 | ||
1251 | FreeBSD kernels prior to r341800 can return stale siginfo for at | |
1252 | least some events, but those events can be identified by | |
1253 | additional flags set in pl_flags. True breakpoint and | |
1254 | single-step traps should not have other flags set in | |
1255 | pl_flags. */ | |
1256 | if (pl.pl_flags != PL_FLAG_SI || pl.pl_siginfo.si_signo != SIGTRAP) | |
7efba073 JB |
1257 | return false; |
1258 | ||
1259 | /* Trace traps are either a single step or a hardware watchpoint or | |
1260 | breakpoint. */ | |
1261 | if (pl.pl_siginfo.si_code == TRAP_TRACE) | |
1262 | { | |
1263 | if (debug_fbsd_nat) | |
1264 | fprintf_unfiltered (gdb_stdlog, | |
1265 | "FNAT: trace trap for LWP %ld\n", ptid.lwp ()); | |
1266 | return true; | |
1267 | } | |
1268 | ||
1269 | if (pl.pl_siginfo.si_code == TRAP_BRKPT) | |
1270 | { | |
1271 | /* Fixup PC for the software breakpoint. */ | |
1272 | struct regcache *regcache = get_thread_regcache (ptid); | |
1273 | struct gdbarch *gdbarch = regcache->arch (); | |
1274 | int decr_pc = gdbarch_decr_pc_after_break (gdbarch); | |
1275 | ||
1276 | if (debug_fbsd_nat) | |
1277 | fprintf_unfiltered (gdb_stdlog, | |
1278 | "FNAT: sw breakpoint trap for LWP %ld\n", | |
1279 | ptid.lwp ()); | |
1280 | if (decr_pc != 0) | |
1281 | { | |
1282 | CORE_ADDR pc; | |
1283 | ||
1284 | pc = regcache_read_pc (regcache); | |
1285 | regcache_write_pc (regcache, pc - decr_pc); | |
1286 | } | |
1287 | return true; | |
1288 | } | |
1289 | ||
1290 | return false; | |
1291 | } | |
1292 | #endif | |
1293 | ||
e58e05d6 JB |
1294 | /* Wait for the child specified by PTID to do something. Return the |
1295 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
1296 | the status in *OURSTATUS. */ | |
1297 | ||
f6ac5f3d PA |
1298 | ptid_t |
1299 | fbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, | |
1300 | int target_options) | |
e58e05d6 JB |
1301 | { |
1302 | ptid_t wptid; | |
1303 | ||
1304 | while (1) | |
1305 | { | |
dbaed385 | 1306 | #ifndef PTRACE_VFORK |
2c5c2a33 | 1307 | wptid = fbsd_next_vfork_done (); |
d7e15655 | 1308 | if (wptid != null_ptid) |
2c5c2a33 JB |
1309 | { |
1310 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1311 | return wptid; | |
1312 | } | |
dbaed385 | 1313 | #endif |
f6ac5f3d | 1314 | wptid = inf_ptrace_target::wait (ptid, ourstatus, target_options); |
e58e05d6 JB |
1315 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED) |
1316 | { | |
1317 | struct ptrace_lwpinfo pl; | |
1318 | pid_t pid; | |
1319 | int status; | |
1320 | ||
e99b03dc | 1321 | pid = wptid.pid (); |
6e9567fe | 1322 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) |
e58e05d6 JB |
1323 | perror_with_name (("ptrace")); |
1324 | ||
fd79271b | 1325 | wptid = ptid_t (pid, pl.pl_lwpid, 0); |
6e9567fe | 1326 | |
386a8676 JB |
1327 | if (debug_fbsd_nat) |
1328 | { | |
1329 | fprintf_unfiltered (gdb_stdlog, | |
1330 | "FNAT: stop for LWP %u event %d flags %#x\n", | |
1331 | pl.pl_lwpid, pl.pl_event, pl.pl_flags); | |
1332 | if (pl.pl_flags & PL_FLAG_SI) | |
1333 | fprintf_unfiltered (gdb_stdlog, | |
1334 | "FNAT: si_signo %u si_code %u\n", | |
1335 | pl.pl_siginfo.si_signo, | |
1336 | pl.pl_siginfo.si_code); | |
1337 | } | |
1338 | ||
6e9567fe JB |
1339 | #ifdef PT_LWP_EVENTS |
1340 | if (pl.pl_flags & PL_FLAG_EXITED) | |
1341 | { | |
1342 | /* If GDB attaches to a multi-threaded process, exiting | |
f6ac5f3d | 1343 | threads might be skipped during post_attach that |
6e9567fe JB |
1344 | have not yet reported their PL_FLAG_EXITED event. |
1345 | Ignore EXITED events for an unknown LWP. */ | |
b7a08269 PA |
1346 | thread_info *thr = find_thread_ptid (wptid); |
1347 | if (thr != nullptr) | |
6e9567fe JB |
1348 | { |
1349 | if (debug_fbsd_lwp) | |
1350 | fprintf_unfiltered (gdb_stdlog, | |
1351 | "FLWP: deleting thread for LWP %u\n", | |
1352 | pl.pl_lwpid); | |
1353 | if (print_thread_events) | |
a068643d TT |
1354 | printf_unfiltered (_("[%s exited]\n"), |
1355 | target_pid_to_str (wptid).c_str ()); | |
b7a08269 | 1356 | delete_thread (thr); |
6e9567fe JB |
1357 | } |
1358 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1359 | perror_with_name (("ptrace")); | |
1360 | continue; | |
1361 | } | |
1362 | #endif | |
1363 | ||
1364 | /* Switch to an LWP PTID on the first stop in a new process. | |
1365 | This is done after handling PL_FLAG_EXITED to avoid | |
1366 | switching to an exited LWP. It is done before checking | |
1367 | PL_FLAG_BORN in case the first stop reported after | |
1368 | attaching to an existing process is a PL_FLAG_BORN | |
1369 | event. */ | |
f2907e49 | 1370 | if (in_thread_list (ptid_t (pid))) |
6e9567fe JB |
1371 | { |
1372 | if (debug_fbsd_lwp) | |
1373 | fprintf_unfiltered (gdb_stdlog, | |
1374 | "FLWP: using LWP %u for first thread\n", | |
1375 | pl.pl_lwpid); | |
f2907e49 | 1376 | thread_change_ptid (ptid_t (pid), wptid); |
6e9567fe JB |
1377 | } |
1378 | ||
1379 | #ifdef PT_LWP_EVENTS | |
1380 | if (pl.pl_flags & PL_FLAG_BORN) | |
1381 | { | |
1382 | /* If GDB attaches to a multi-threaded process, newborn | |
1383 | threads might be added by fbsd_add_threads that have | |
1384 | not yet reported their PL_FLAG_BORN event. Ignore | |
1385 | BORN events for an already-known LWP. */ | |
1386 | if (!in_thread_list (wptid)) | |
1387 | { | |
1388 | if (debug_fbsd_lwp) | |
1389 | fprintf_unfiltered (gdb_stdlog, | |
1390 | "FLWP: adding thread for LWP %u\n", | |
1391 | pl.pl_lwpid); | |
1392 | add_thread (wptid); | |
1393 | } | |
1394 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
1395 | return wptid; | |
1396 | } | |
1397 | #endif | |
1398 | ||
e58e05d6 JB |
1399 | #ifdef TDP_RFPPWAIT |
1400 | if (pl.pl_flags & PL_FLAG_FORKED) | |
1401 | { | |
dbaed385 | 1402 | #ifndef PTRACE_VFORK |
e58e05d6 | 1403 | struct kinfo_proc kp; |
dbaed385 | 1404 | #endif |
6e9567fe | 1405 | ptid_t child_ptid; |
e58e05d6 JB |
1406 | pid_t child; |
1407 | ||
1408 | child = pl.pl_child_pid; | |
1409 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
dbaed385 JB |
1410 | #ifdef PTRACE_VFORK |
1411 | if (pl.pl_flags & PL_FLAG_VFORKED) | |
1412 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1413 | #endif | |
e58e05d6 JB |
1414 | |
1415 | /* Make sure the other end of the fork is stopped too. */ | |
6e9567fe | 1416 | child_ptid = fbsd_is_child_pending (child); |
d7e15655 | 1417 | if (child_ptid == null_ptid) |
e58e05d6 JB |
1418 | { |
1419 | pid = waitpid (child, &status, 0); | |
1420 | if (pid == -1) | |
1421 | perror_with_name (("waitpid")); | |
1422 | ||
1423 | gdb_assert (pid == child); | |
1424 | ||
1425 | if (ptrace (PT_LWPINFO, child, (caddr_t)&pl, sizeof pl) == -1) | |
1426 | perror_with_name (("ptrace")); | |
1427 | ||
1428 | gdb_assert (pl.pl_flags & PL_FLAG_CHILD); | |
fd79271b | 1429 | child_ptid = ptid_t (child, pl.pl_lwpid, 0); |
e58e05d6 JB |
1430 | } |
1431 | ||
5fa14c6b | 1432 | /* Enable additional events on the child process. */ |
e99b03dc | 1433 | fbsd_enable_proc_events (child_ptid.pid ()); |
5fa14c6b | 1434 | |
dbaed385 | 1435 | #ifndef PTRACE_VFORK |
e58e05d6 JB |
1436 | /* For vfork, the child process will have the P_PPWAIT |
1437 | flag set. */ | |
92fce24d JB |
1438 | if (fbsd_fetch_kinfo_proc (child, &kp)) |
1439 | { | |
1440 | if (kp.ki_flag & P_PPWAIT) | |
1441 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1442 | } | |
1443 | else | |
1444 | warning (_("Failed to fetch process information")); | |
dbaed385 | 1445 | #endif |
6e9567fe | 1446 | ourstatus->value.related_pid = child_ptid; |
e58e05d6 JB |
1447 | |
1448 | return wptid; | |
1449 | } | |
1450 | ||
1451 | if (pl.pl_flags & PL_FLAG_CHILD) | |
1452 | { | |
1453 | /* Remember that this child forked, but do not report it | |
1454 | until the parent reports its corresponding fork | |
1455 | event. */ | |
6e9567fe | 1456 | fbsd_remember_child (wptid); |
e58e05d6 JB |
1457 | continue; |
1458 | } | |
dbaed385 JB |
1459 | |
1460 | #ifdef PTRACE_VFORK | |
1461 | if (pl.pl_flags & PL_FLAG_VFORK_DONE) | |
1462 | { | |
1463 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1464 | return wptid; | |
1465 | } | |
1466 | #endif | |
e58e05d6 | 1467 | #endif |
d2b41ca0 JB |
1468 | |
1469 | #ifdef PL_FLAG_EXEC | |
1470 | if (pl.pl_flags & PL_FLAG_EXEC) | |
1471 | { | |
1472 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
1473 | ourstatus->value.execd_pathname | |
f6ac5f3d | 1474 | = xstrdup (pid_to_exec_file (pid)); |
d2b41ca0 JB |
1475 | return wptid; |
1476 | } | |
1477 | #endif | |
e6cdd38e | 1478 | |
7efba073 | 1479 | #ifdef USE_SIGTRAP_SIGINFO |
f6ac5f3d | 1480 | if (fbsd_handle_debug_trap (wptid, pl)) |
7efba073 JB |
1481 | return wptid; |
1482 | #endif | |
1483 | ||
e6cdd38e JB |
1484 | /* Note that PL_FLAG_SCE is set for any event reported while |
1485 | a thread is executing a system call in the kernel. In | |
1486 | particular, signals that interrupt a sleep in a system | |
1487 | call will report this flag as part of their event. Stops | |
1488 | explicitly for system call entry and exit always use | |
1489 | SIGTRAP, so only treat SIGTRAP events as system call | |
1490 | entry/exit events. */ | |
1491 | if (pl.pl_flags & (PL_FLAG_SCE | PL_FLAG_SCX) | |
1492 | && ourstatus->value.sig == SIGTRAP) | |
1493 | { | |
1494 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1495 | if (catch_syscall_enabled ()) | |
1496 | { | |
1497 | if (catching_syscall_number (pl.pl_syscall_code)) | |
1498 | { | |
1499 | if (pl.pl_flags & PL_FLAG_SCE) | |
1500 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
1501 | else | |
1502 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
1503 | ourstatus->value.syscall_number = pl.pl_syscall_code; | |
1504 | return wptid; | |
1505 | } | |
1506 | } | |
1507 | #endif | |
1508 | /* If the core isn't interested in this event, just | |
1509 | continue the process explicitly and wait for another | |
1510 | event. Note that PT_SYSCALL is "sticky" on FreeBSD | |
1511 | and once system call stops are enabled on a process | |
1512 | it stops for all system call entries and exits. */ | |
1513 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1514 | perror_with_name (("ptrace")); | |
1515 | continue; | |
1516 | } | |
e58e05d6 JB |
1517 | } |
1518 | return wptid; | |
1519 | } | |
1520 | } | |
1521 | ||
7efba073 | 1522 | #ifdef USE_SIGTRAP_SIGINFO |
f6ac5f3d | 1523 | /* Implement the "stopped_by_sw_breakpoint" target_ops method. */ |
7efba073 | 1524 | |
57810aa7 | 1525 | bool |
f6ac5f3d | 1526 | fbsd_nat_target::stopped_by_sw_breakpoint () |
7efba073 JB |
1527 | { |
1528 | struct ptrace_lwpinfo pl; | |
1529 | ||
1530 | if (ptrace (PT_LWPINFO, get_ptrace_pid (inferior_ptid), (caddr_t) &pl, | |
1531 | sizeof pl) == -1) | |
57810aa7 | 1532 | return false; |
7efba073 | 1533 | |
6d78332e | 1534 | return (pl.pl_flags == PL_FLAG_SI |
7efba073 JB |
1535 | && pl.pl_siginfo.si_signo == SIGTRAP |
1536 | && pl.pl_siginfo.si_code == TRAP_BRKPT); | |
1537 | } | |
1538 | ||
f6ac5f3d | 1539 | /* Implement the "supports_stopped_by_sw_breakpoint" target_ops |
7efba073 JB |
1540 | method. */ |
1541 | ||
57810aa7 | 1542 | bool |
f6ac5f3d | 1543 | fbsd_nat_target::supports_stopped_by_sw_breakpoint () |
7efba073 | 1544 | { |
57810aa7 | 1545 | return true; |
7efba073 | 1546 | } |
7efba073 JB |
1547 | #endif |
1548 | ||
e58e05d6 JB |
1549 | #ifdef TDP_RFPPWAIT |
1550 | /* Target hook for follow_fork. On entry and at return inferior_ptid is | |
1551 | the ptid of the followed inferior. */ | |
1552 | ||
f6ac5f3d PA |
1553 | int |
1554 | fbsd_nat_target::follow_fork (int follow_child, int detach_fork) | |
e58e05d6 | 1555 | { |
bb2a62e6 | 1556 | if (!follow_child && detach_fork) |
e58e05d6 JB |
1557 | { |
1558 | struct thread_info *tp = inferior_thread (); | |
e99b03dc | 1559 | pid_t child_pid = tp->pending_follow.value.related_pid.pid (); |
e58e05d6 JB |
1560 | |
1561 | /* Breakpoints have already been detached from the child by | |
1562 | infrun.c. */ | |
1563 | ||
1564 | if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1) | |
1565 | perror_with_name (("ptrace")); | |
2c5c2a33 | 1566 | |
dbaed385 JB |
1567 | #ifndef PTRACE_VFORK |
1568 | if (tp->pending_follow.kind == TARGET_WAITKIND_VFORKED) | |
2c5c2a33 JB |
1569 | { |
1570 | /* We can't insert breakpoints until the child process has | |
1571 | finished with the shared memory region. The parent | |
1572 | process doesn't wait for the child process to exit or | |
1573 | exec until after it has been resumed from the ptrace stop | |
1574 | to report the fork. Once it has been resumed it doesn't | |
1575 | stop again before returning to userland, so there is no | |
1576 | reliable way to wait on the parent. | |
1577 | ||
1578 | We can't stay attached to the child to wait for an exec | |
1579 | or exit because it may invoke ptrace(PT_TRACE_ME) | |
1580 | (e.g. if the parent process is a debugger forking a new | |
1581 | child process). | |
1582 | ||
1583 | In the end, the best we can do is to make sure it runs | |
1584 | for a little while. Hopefully it will be out of range of | |
1585 | any breakpoints we reinsert. Usually this is only the | |
1586 | single-step breakpoint at vfork's return point. */ | |
1587 | ||
1588 | usleep (10000); | |
1589 | ||
1590 | /* Schedule a fake VFORK_DONE event to report on the next | |
1591 | wait. */ | |
1592 | fbsd_add_vfork_done (inferior_ptid); | |
1593 | } | |
dbaed385 | 1594 | #endif |
e58e05d6 JB |
1595 | } |
1596 | ||
1597 | return 0; | |
1598 | } | |
1599 | ||
f6ac5f3d PA |
1600 | int |
1601 | fbsd_nat_target::insert_fork_catchpoint (int pid) | |
e58e05d6 JB |
1602 | { |
1603 | return 0; | |
1604 | } | |
1605 | ||
f6ac5f3d PA |
1606 | int |
1607 | fbsd_nat_target::remove_fork_catchpoint (int pid) | |
e58e05d6 JB |
1608 | { |
1609 | return 0; | |
1610 | } | |
1611 | ||
f6ac5f3d PA |
1612 | int |
1613 | fbsd_nat_target::insert_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1614 | { |
1615 | return 0; | |
1616 | } | |
1617 | ||
f6ac5f3d PA |
1618 | int |
1619 | fbsd_nat_target::remove_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1620 | { |
1621 | return 0; | |
1622 | } | |
6e9567fe | 1623 | #endif |
e58e05d6 | 1624 | |
f6ac5f3d | 1625 | /* Implement the "post_startup_inferior" target_ops method. */ |
e58e05d6 | 1626 | |
f6ac5f3d PA |
1627 | void |
1628 | fbsd_nat_target::post_startup_inferior (ptid_t pid) | |
e58e05d6 | 1629 | { |
e99b03dc | 1630 | fbsd_enable_proc_events (pid.pid ()); |
e58e05d6 JB |
1631 | } |
1632 | ||
f6ac5f3d | 1633 | /* Implement the "post_attach" target_ops method. */ |
e58e05d6 | 1634 | |
f6ac5f3d PA |
1635 | void |
1636 | fbsd_nat_target::post_attach (int pid) | |
e58e05d6 | 1637 | { |
da95a26c | 1638 | fbsd_enable_proc_events (pid); |
6e9567fe JB |
1639 | fbsd_add_threads (pid); |
1640 | } | |
d2b41ca0 JB |
1641 | |
1642 | #ifdef PL_FLAG_EXEC | |
1643 | /* If the FreeBSD kernel supports PL_FLAG_EXEC, then traced processes | |
1644 | will always stop after exec. */ | |
1645 | ||
f6ac5f3d PA |
1646 | int |
1647 | fbsd_nat_target::insert_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1648 | { |
1649 | return 0; | |
1650 | } | |
1651 | ||
f6ac5f3d PA |
1652 | int |
1653 | fbsd_nat_target::remove_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1654 | { |
1655 | return 0; | |
1656 | } | |
1657 | #endif | |
e6cdd38e JB |
1658 | |
1659 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
f6ac5f3d PA |
1660 | int |
1661 | fbsd_nat_target::set_syscall_catchpoint (int pid, bool needed, | |
1662 | int any_count, | |
1663 | gdb::array_view<const int> syscall_counts) | |
e6cdd38e JB |
1664 | { |
1665 | ||
1666 | /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which | |
1667 | will catch all system call entries and exits. The system calls | |
1668 | are filtered by GDB rather than the kernel. */ | |
1669 | return 0; | |
1670 | } | |
1671 | #endif | |
e58e05d6 JB |
1672 | #endif |
1673 | ||
6e9567fe JB |
1674 | void |
1675 | _initialize_fbsd_nat (void) | |
1676 | { | |
1677 | #ifdef PT_LWPINFO | |
1678 | add_setshow_boolean_cmd ("fbsd-lwp", class_maintenance, | |
1679 | &debug_fbsd_lwp, _("\ | |
1680 | Set debugging of FreeBSD lwp module."), _("\ | |
1681 | Show debugging of FreeBSD lwp module."), _("\ | |
1682 | Enables printf debugging output."), | |
1683 | NULL, | |
1684 | &show_fbsd_lwp_debug, | |
1685 | &setdebuglist, &showdebuglist); | |
386a8676 JB |
1686 | add_setshow_boolean_cmd ("fbsd-nat", class_maintenance, |
1687 | &debug_fbsd_nat, _("\ | |
1688 | Set debugging of FreeBSD native target."), _("\ | |
1689 | Show debugging of FreeBSD native target."), _("\ | |
1690 | Enables printf debugging output."), | |
1691 | NULL, | |
1692 | &show_fbsd_nat_debug, | |
1693 | &setdebuglist, &showdebuglist); | |
6e9567fe JB |
1694 | #endif |
1695 | } |