Commit | Line | Data |
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578c1c03 MK |
1 | /* Native-dependent code for FreeBSD. |
2 | ||
3666a048 | 3 | Copyright (C) 2002-2021 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" | |
268a13a5 | 21 | #include "gdbsupport/byte-vector.h" |
4de283e4 TT |
22 | #include "gdbcore.h" |
23 | #include "inferior.h" | |
24 | #include "regcache.h" | |
25 | #include "regset.h" | |
cbde90f2 | 26 | #include "gdbarch.h" |
4de283e4 TT |
27 | #include "gdbcmd.h" |
28 | #include "gdbthread.h" | |
268a13a5 | 29 | #include "gdbsupport/gdb_wait.h" |
4de283e4 TT |
30 | #include "inf-ptrace.h" |
31 | #include <sys/types.h> | |
09db4332 JB |
32 | #ifdef HAVE_SYS_PROCCTL_H |
33 | #include <sys/procctl.h> | |
34 | #endif | |
68b9939a | 35 | #include <sys/procfs.h> |
e58e05d6 | 36 | #include <sys/ptrace.h> |
929edea9 | 37 | #include <sys/signal.h> |
68b9939a | 38 | #include <sys/sysctl.h> |
25268153 | 39 | #include <sys/user.h> |
4de283e4 | 40 | #include <libutil.h> |
4de283e4 | 41 | |
578c1c03 MK |
42 | #include "elf-bfd.h" |
43 | #include "fbsd-nat.h" | |
92fce24d | 44 | #include "fbsd-tdep.h" |
4de283e4 TT |
45 | |
46 | #include <list> | |
e8c6b620 | 47 | |
766062f6 | 48 | /* Return the name of a file that can be opened to get the symbols for |
578c1c03 MK |
49 | the child process identified by PID. */ |
50 | ||
f6ac5f3d PA |
51 | char * |
52 | fbsd_nat_target::pid_to_exec_file (int pid) | |
578c1c03 | 53 | { |
b4ab256d | 54 | static char buf[PATH_MAX]; |
f2feec98 | 55 | size_t buflen; |
68b9939a | 56 | int mib[4]; |
578c1c03 | 57 | |
68b9939a MK |
58 | mib[0] = CTL_KERN; |
59 | mib[1] = KERN_PROC; | |
60 | mib[2] = KERN_PROC_PATHNAME; | |
61 | mib[3] = pid; | |
f2feec98 JB |
62 | buflen = sizeof buf; |
63 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
b999e203 JB |
64 | /* The kern.proc.pathname.<pid> sysctl returns a length of zero |
65 | for processes without an associated executable such as kernel | |
66 | processes. */ | |
67 | return buflen == 0 ? NULL : buf; | |
68b9939a | 68 | |
b4ab256d | 69 | return NULL; |
578c1c03 MK |
70 | } |
71 | ||
25268153 | 72 | /* Iterate over all the memory regions in the current inferior, |
d1076c41 | 73 | calling FUNC for each memory region. DATA is passed as the last |
25268153 JB |
74 | argument to FUNC. */ |
75 | ||
f6ac5f3d PA |
76 | int |
77 | fbsd_nat_target::find_memory_regions (find_memory_region_ftype func, | |
d1076c41 | 78 | void *data) |
25268153 | 79 | { |
e99b03dc | 80 | pid_t pid = inferior_ptid.pid (); |
e4a26669 | 81 | struct kinfo_vmentry *kve; |
25268153 | 82 | uint64_t size; |
25268153 JB |
83 | int i, nitems; |
84 | ||
262f62f5 | 85 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> |
e4a26669 | 86 | vmentl (kinfo_getvmmap (pid, &nitems)); |
25268153 JB |
87 | if (vmentl == NULL) |
88 | perror_with_name (_("Couldn't fetch VM map entries.")); | |
25268153 | 89 | |
e4a26669 | 90 | for (i = 0, kve = vmentl.get (); i < nitems; i++, kve++) |
25268153 | 91 | { |
25268153 JB |
92 | /* Skip unreadable segments and those where MAP_NOCORE has been set. */ |
93 | if (!(kve->kve_protection & KVME_PROT_READ) | |
94 | || kve->kve_flags & KVME_FLAG_NOCOREDUMP) | |
95 | continue; | |
96 | ||
97 | /* Skip segments with an invalid type. */ | |
98 | if (kve->kve_type != KVME_TYPE_DEFAULT | |
99 | && kve->kve_type != KVME_TYPE_VNODE | |
100 | && kve->kve_type != KVME_TYPE_SWAP | |
101 | && kve->kve_type != KVME_TYPE_PHYS) | |
102 | continue; | |
103 | ||
104 | size = kve->kve_end - kve->kve_start; | |
105 | if (info_verbose) | |
106 | { | |
107 | fprintf_filtered (gdb_stdout, | |
108 | "Save segment, %ld bytes at %s (%c%c%c)\n", | |
109 | (long) size, | |
110 | paddress (target_gdbarch (), kve->kve_start), | |
111 | kve->kve_protection & KVME_PROT_READ ? 'r' : '-', | |
112 | kve->kve_protection & KVME_PROT_WRITE ? 'w' : '-', | |
113 | kve->kve_protection & KVME_PROT_EXEC ? 'x' : '-'); | |
114 | } | |
115 | ||
116 | /* Invoke the callback function to create the corefile segment. | |
117 | Pass MODIFIED as true, we do not know the real modification state. */ | |
118 | func (kve->kve_start, size, kve->kve_protection & KVME_PROT_READ, | |
119 | kve->kve_protection & KVME_PROT_WRITE, | |
d1076c41 | 120 | kve->kve_protection & KVME_PROT_EXEC, 1, data); |
25268153 | 121 | } |
25268153 JB |
122 | return 0; |
123 | } | |
8f60fe01 | 124 | |
92fce24d JB |
125 | /* Fetch the command line for a running process. */ |
126 | ||
127 | static gdb::unique_xmalloc_ptr<char> | |
128 | fbsd_fetch_cmdline (pid_t pid) | |
129 | { | |
130 | size_t len; | |
131 | int mib[4]; | |
132 | ||
133 | len = 0; | |
134 | mib[0] = CTL_KERN; | |
135 | mib[1] = KERN_PROC; | |
136 | mib[2] = KERN_PROC_ARGS; | |
137 | mib[3] = pid; | |
138 | if (sysctl (mib, 4, NULL, &len, NULL, 0) == -1) | |
139 | return nullptr; | |
140 | ||
141 | if (len == 0) | |
142 | return nullptr; | |
143 | ||
144 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) xmalloc (len)); | |
145 | if (sysctl (mib, 4, cmdline.get (), &len, NULL, 0) == -1) | |
146 | return nullptr; | |
147 | ||
424eb552 JB |
148 | /* Join the arguments with spaces to form a single string. */ |
149 | char *cp = cmdline.get (); | |
150 | for (size_t i = 0; i < len - 1; i++) | |
151 | if (cp[i] == '\0') | |
152 | cp[i] = ' '; | |
153 | cp[len - 1] = '\0'; | |
154 | ||
92fce24d JB |
155 | return cmdline; |
156 | } | |
157 | ||
158 | /* Fetch the external variant of the kernel's internal process | |
159 | structure for the process PID into KP. */ | |
160 | ||
161 | static bool | |
162 | fbsd_fetch_kinfo_proc (pid_t pid, struct kinfo_proc *kp) | |
163 | { | |
164 | size_t len; | |
165 | int mib[4]; | |
166 | ||
167 | len = sizeof *kp; | |
168 | mib[0] = CTL_KERN; | |
169 | mib[1] = KERN_PROC; | |
170 | mib[2] = KERN_PROC_PID; | |
171 | mib[3] = pid; | |
172 | return (sysctl (mib, 4, kp, &len, NULL, 0) == 0); | |
173 | } | |
174 | ||
f6ac5f3d | 175 | /* Implement the "info_proc" target_ops method. */ |
92fce24d | 176 | |
f6ac5f3d PA |
177 | bool |
178 | fbsd_nat_target::info_proc (const char *args, enum info_proc_what what) | |
92fce24d | 179 | { |
92fce24d JB |
180 | gdb::unique_xmalloc_ptr<struct kinfo_file> fdtbl; |
181 | int nfd = 0; | |
92fce24d | 182 | struct kinfo_proc kp; |
92fce24d JB |
183 | pid_t pid; |
184 | bool do_cmdline = false; | |
185 | bool do_cwd = false; | |
186 | bool do_exe = false; | |
7e69672e | 187 | bool do_files = false; |
92fce24d | 188 | bool do_mappings = false; |
92fce24d JB |
189 | bool do_status = false; |
190 | ||
191 | switch (what) | |
192 | { | |
193 | case IP_MINIMAL: | |
194 | do_cmdline = true; | |
195 | do_cwd = true; | |
196 | do_exe = true; | |
197 | break; | |
92fce24d JB |
198 | case IP_MAPPINGS: |
199 | do_mappings = true; | |
200 | break; | |
92fce24d JB |
201 | case IP_STATUS: |
202 | case IP_STAT: | |
203 | do_status = true; | |
204 | break; | |
205 | case IP_CMDLINE: | |
206 | do_cmdline = true; | |
207 | break; | |
208 | case IP_EXE: | |
209 | do_exe = true; | |
210 | break; | |
211 | case IP_CWD: | |
212 | do_cwd = true; | |
213 | break; | |
7e69672e JB |
214 | case IP_FILES: |
215 | do_files = true; | |
216 | break; | |
92fce24d JB |
217 | case IP_ALL: |
218 | do_cmdline = true; | |
219 | do_cwd = true; | |
220 | do_exe = true; | |
7e69672e | 221 | do_files = true; |
92fce24d | 222 | do_mappings = true; |
92fce24d JB |
223 | do_status = true; |
224 | break; | |
225 | default: | |
226 | error (_("Not supported on this target.")); | |
227 | } | |
228 | ||
229 | gdb_argv built_argv (args); | |
230 | if (built_argv.count () == 0) | |
231 | { | |
e99b03dc | 232 | pid = inferior_ptid.pid (); |
92fce24d JB |
233 | if (pid == 0) |
234 | error (_("No current process: you must name one.")); | |
235 | } | |
236 | else if (built_argv.count () == 1 && isdigit (built_argv[0][0])) | |
237 | pid = strtol (built_argv[0], NULL, 10); | |
238 | else | |
239 | error (_("Invalid arguments.")); | |
240 | ||
241 | printf_filtered (_("process %d\n"), pid); | |
7e69672e | 242 | if (do_cwd || do_exe || do_files) |
92fce24d | 243 | fdtbl.reset (kinfo_getfile (pid, &nfd)); |
92fce24d JB |
244 | |
245 | if (do_cmdline) | |
246 | { | |
247 | gdb::unique_xmalloc_ptr<char> cmdline = fbsd_fetch_cmdline (pid); | |
248 | if (cmdline != nullptr) | |
249 | printf_filtered ("cmdline = '%s'\n", cmdline.get ()); | |
250 | else | |
251 | warning (_("unable to fetch command line")); | |
252 | } | |
253 | if (do_cwd) | |
254 | { | |
255 | const char *cwd = NULL; | |
92fce24d JB |
256 | struct kinfo_file *kf = fdtbl.get (); |
257 | for (int i = 0; i < nfd; i++, kf++) | |
258 | { | |
259 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_CWD) | |
260 | { | |
261 | cwd = kf->kf_path; | |
262 | break; | |
263 | } | |
264 | } | |
92fce24d JB |
265 | if (cwd != NULL) |
266 | printf_filtered ("cwd = '%s'\n", cwd); | |
267 | else | |
268 | warning (_("unable to fetch current working directory")); | |
269 | } | |
270 | if (do_exe) | |
271 | { | |
272 | const char *exe = NULL; | |
92fce24d JB |
273 | struct kinfo_file *kf = fdtbl.get (); |
274 | for (int i = 0; i < nfd; i++, kf++) | |
275 | { | |
276 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_TEXT) | |
277 | { | |
278 | exe = kf->kf_path; | |
279 | break; | |
280 | } | |
281 | } | |
92fce24d | 282 | if (exe == NULL) |
f6ac5f3d | 283 | exe = pid_to_exec_file (pid); |
92fce24d JB |
284 | if (exe != NULL) |
285 | printf_filtered ("exe = '%s'\n", exe); | |
286 | else | |
287 | warning (_("unable to fetch executable path name")); | |
288 | } | |
7e69672e JB |
289 | if (do_files) |
290 | { | |
291 | struct kinfo_file *kf = fdtbl.get (); | |
292 | ||
293 | if (nfd > 0) | |
294 | { | |
295 | fbsd_info_proc_files_header (); | |
296 | for (int i = 0; i < nfd; i++, kf++) | |
297 | fbsd_info_proc_files_entry (kf->kf_type, kf->kf_fd, kf->kf_flags, | |
298 | kf->kf_offset, kf->kf_vnode_type, | |
299 | kf->kf_sock_domain, kf->kf_sock_type, | |
300 | kf->kf_sock_protocol, &kf->kf_sa_local, | |
301 | &kf->kf_sa_peer, kf->kf_path); | |
302 | } | |
303 | else | |
304 | warning (_("unable to fetch list of open files")); | |
305 | } | |
92fce24d JB |
306 | if (do_mappings) |
307 | { | |
308 | int nvment; | |
309 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> | |
310 | vmentl (kinfo_getvmmap (pid, &nvment)); | |
311 | ||
312 | if (vmentl != nullptr) | |
313 | { | |
6f3b1098 JB |
314 | int addr_bit = TARGET_CHAR_BIT * sizeof (void *); |
315 | fbsd_info_proc_mappings_header (addr_bit); | |
92fce24d JB |
316 | |
317 | struct kinfo_vmentry *kve = vmentl.get (); | |
318 | for (int i = 0; i < nvment; i++, kve++) | |
6f3b1098 JB |
319 | fbsd_info_proc_mappings_entry (addr_bit, kve->kve_start, |
320 | kve->kve_end, kve->kve_offset, | |
321 | kve->kve_flags, kve->kve_protection, | |
322 | kve->kve_path); | |
92fce24d JB |
323 | } |
324 | else | |
325 | warning (_("unable to fetch virtual memory map")); | |
326 | } | |
92fce24d JB |
327 | if (do_status) |
328 | { | |
329 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) | |
330 | warning (_("Failed to fetch process information")); | |
331 | else | |
332 | { | |
333 | const char *state; | |
334 | int pgtok; | |
335 | ||
336 | printf_filtered ("Name: %s\n", kp.ki_comm); | |
337 | switch (kp.ki_stat) | |
338 | { | |
339 | case SIDL: | |
340 | state = "I (idle)"; | |
341 | break; | |
342 | case SRUN: | |
343 | state = "R (running)"; | |
344 | break; | |
345 | case SSTOP: | |
346 | state = "T (stopped)"; | |
347 | break; | |
348 | case SZOMB: | |
349 | state = "Z (zombie)"; | |
350 | break; | |
351 | case SSLEEP: | |
352 | state = "S (sleeping)"; | |
353 | break; | |
354 | case SWAIT: | |
355 | state = "W (interrupt wait)"; | |
356 | break; | |
357 | case SLOCK: | |
358 | state = "L (blocked on lock)"; | |
359 | break; | |
360 | default: | |
361 | state = "? (unknown)"; | |
362 | break; | |
363 | } | |
364 | printf_filtered ("State: %s\n", state); | |
365 | printf_filtered ("Parent process: %d\n", kp.ki_ppid); | |
366 | printf_filtered ("Process group: %d\n", kp.ki_pgid); | |
367 | printf_filtered ("Session id: %d\n", kp.ki_sid); | |
368 | printf_filtered ("TTY: %ju\n", (uintmax_t) kp.ki_tdev); | |
369 | printf_filtered ("TTY owner process group: %d\n", kp.ki_tpgid); | |
370 | printf_filtered ("User IDs (real, effective, saved): %d %d %d\n", | |
371 | kp.ki_ruid, kp.ki_uid, kp.ki_svuid); | |
372 | printf_filtered ("Group IDs (real, effective, saved): %d %d %d\n", | |
373 | kp.ki_rgid, kp.ki_groups[0], kp.ki_svgid); | |
374 | printf_filtered ("Groups: "); | |
375 | for (int i = 0; i < kp.ki_ngroups; i++) | |
376 | printf_filtered ("%d ", kp.ki_groups[i]); | |
377 | printf_filtered ("\n"); | |
378 | printf_filtered ("Minor faults (no memory page): %ld\n", | |
379 | kp.ki_rusage.ru_minflt); | |
380 | printf_filtered ("Minor faults, children: %ld\n", | |
381 | kp.ki_rusage_ch.ru_minflt); | |
382 | printf_filtered ("Major faults (memory page faults): %ld\n", | |
383 | kp.ki_rusage.ru_majflt); | |
384 | printf_filtered ("Major faults, children: %ld\n", | |
385 | kp.ki_rusage_ch.ru_majflt); | |
386 | printf_filtered ("utime: %jd.%06ld\n", | |
387 | (intmax_t) kp.ki_rusage.ru_utime.tv_sec, | |
388 | kp.ki_rusage.ru_utime.tv_usec); | |
389 | printf_filtered ("stime: %jd.%06ld\n", | |
390 | (intmax_t) kp.ki_rusage.ru_stime.tv_sec, | |
391 | kp.ki_rusage.ru_stime.tv_usec); | |
392 | printf_filtered ("utime, children: %jd.%06ld\n", | |
393 | (intmax_t) kp.ki_rusage_ch.ru_utime.tv_sec, | |
394 | kp.ki_rusage_ch.ru_utime.tv_usec); | |
395 | printf_filtered ("stime, children: %jd.%06ld\n", | |
396 | (intmax_t) kp.ki_rusage_ch.ru_stime.tv_sec, | |
397 | kp.ki_rusage_ch.ru_stime.tv_usec); | |
398 | printf_filtered ("'nice' value: %d\n", kp.ki_nice); | |
399 | printf_filtered ("Start time: %jd.%06ld\n", kp.ki_start.tv_sec, | |
400 | kp.ki_start.tv_usec); | |
401 | pgtok = getpagesize () / 1024; | |
402 | printf_filtered ("Virtual memory size: %ju kB\n", | |
403 | (uintmax_t) kp.ki_size / 1024); | |
404 | printf_filtered ("Data size: %ju kB\n", | |
405 | (uintmax_t) kp.ki_dsize * pgtok); | |
406 | printf_filtered ("Stack size: %ju kB\n", | |
407 | (uintmax_t) kp.ki_ssize * pgtok); | |
408 | printf_filtered ("Text size: %ju kB\n", | |
409 | (uintmax_t) kp.ki_tsize * pgtok); | |
410 | printf_filtered ("Resident set size: %ju kB\n", | |
411 | (uintmax_t) kp.ki_rssize * pgtok); | |
412 | printf_filtered ("Maximum RSS: %ju kB\n", | |
413 | (uintmax_t) kp.ki_rusage.ru_maxrss); | |
414 | printf_filtered ("Pending Signals: "); | |
415 | for (int i = 0; i < _SIG_WORDS; i++) | |
416 | printf_filtered ("%08x ", kp.ki_siglist.__bits[i]); | |
417 | printf_filtered ("\n"); | |
418 | printf_filtered ("Ignored Signals: "); | |
419 | for (int i = 0; i < _SIG_WORDS; i++) | |
420 | printf_filtered ("%08x ", kp.ki_sigignore.__bits[i]); | |
421 | printf_filtered ("\n"); | |
422 | printf_filtered ("Caught Signals: "); | |
423 | for (int i = 0; i < _SIG_WORDS; i++) | |
424 | printf_filtered ("%08x ", kp.ki_sigcatch.__bits[i]); | |
425 | printf_filtered ("\n"); | |
426 | } | |
427 | } | |
f6ac5f3d PA |
428 | |
429 | return true; | |
92fce24d JB |
430 | } |
431 | ||
929edea9 JB |
432 | /* Return the size of siginfo for the current inferior. */ |
433 | ||
434 | #ifdef __LP64__ | |
435 | union sigval32 { | |
436 | int sival_int; | |
437 | uint32_t sival_ptr; | |
438 | }; | |
439 | ||
440 | /* This structure matches the naming and layout of `siginfo_t' in | |
441 | <sys/signal.h>. In particular, the `si_foo' macros defined in that | |
442 | header can be used with both types to copy fields in the `_reason' | |
443 | union. */ | |
444 | ||
445 | struct siginfo32 | |
446 | { | |
447 | int si_signo; | |
448 | int si_errno; | |
449 | int si_code; | |
450 | __pid_t si_pid; | |
451 | __uid_t si_uid; | |
452 | int si_status; | |
453 | uint32_t si_addr; | |
454 | union sigval32 si_value; | |
455 | union | |
456 | { | |
457 | struct | |
458 | { | |
459 | int _trapno; | |
460 | } _fault; | |
461 | struct | |
462 | { | |
463 | int _timerid; | |
464 | int _overrun; | |
465 | } _timer; | |
466 | struct | |
467 | { | |
468 | int _mqd; | |
469 | } _mesgq; | |
470 | struct | |
471 | { | |
472 | int32_t _band; | |
473 | } _poll; | |
474 | struct | |
475 | { | |
476 | int32_t __spare1__; | |
477 | int __spare2__[7]; | |
478 | } __spare__; | |
479 | } _reason; | |
480 | }; | |
481 | #endif | |
482 | ||
483 | static size_t | |
484 | fbsd_siginfo_size () | |
485 | { | |
486 | #ifdef __LP64__ | |
487 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
488 | ||
489 | /* Is the inferior 32-bit? If so, use the 32-bit siginfo size. */ | |
a181c0bf | 490 | if (gdbarch_long_bit (gdbarch) == 32) |
929edea9 JB |
491 | return sizeof (struct siginfo32); |
492 | #endif | |
493 | return sizeof (siginfo_t); | |
494 | } | |
495 | ||
496 | /* Convert a native 64-bit siginfo object to a 32-bit object. Note | |
497 | that FreeBSD doesn't support writing to $_siginfo, so this only | |
498 | needs to convert one way. */ | |
499 | ||
500 | static void | |
501 | fbsd_convert_siginfo (siginfo_t *si) | |
502 | { | |
503 | #ifdef __LP64__ | |
504 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
505 | ||
506 | /* Is the inferior 32-bit? If not, nothing to do. */ | |
a181c0bf | 507 | if (gdbarch_long_bit (gdbarch) != 32) |
929edea9 JB |
508 | return; |
509 | ||
510 | struct siginfo32 si32; | |
511 | ||
512 | si32.si_signo = si->si_signo; | |
513 | si32.si_errno = si->si_errno; | |
514 | si32.si_code = si->si_code; | |
515 | si32.si_pid = si->si_pid; | |
516 | si32.si_uid = si->si_uid; | |
517 | si32.si_status = si->si_status; | |
518 | si32.si_addr = (uintptr_t) si->si_addr; | |
519 | ||
520 | /* If sival_ptr is being used instead of sival_int on a big-endian | |
521 | platform, then sival_int will be zero since it holds the upper | |
522 | 32-bits of the pointer value. */ | |
523 | #if _BYTE_ORDER == _BIG_ENDIAN | |
524 | if (si->si_value.sival_int == 0) | |
0335ac6d | 525 | si32.si_value.sival_ptr = (uintptr_t) si->si_value.sival_ptr; |
929edea9 JB |
526 | else |
527 | si32.si_value.sival_int = si->si_value.sival_int; | |
528 | #else | |
529 | si32.si_value.sival_int = si->si_value.sival_int; | |
530 | #endif | |
531 | ||
532 | /* Always copy the spare fields and then possibly overwrite them for | |
533 | signal-specific or code-specific fields. */ | |
534 | si32._reason.__spare__.__spare1__ = si->_reason.__spare__.__spare1__; | |
535 | for (int i = 0; i < 7; i++) | |
536 | si32._reason.__spare__.__spare2__[i] = si->_reason.__spare__.__spare2__[i]; | |
537 | switch (si->si_signo) { | |
538 | case SIGILL: | |
539 | case SIGFPE: | |
540 | case SIGSEGV: | |
541 | case SIGBUS: | |
542 | si32.si_trapno = si->si_trapno; | |
543 | break; | |
544 | } | |
545 | switch (si->si_code) { | |
546 | case SI_TIMER: | |
547 | si32.si_timerid = si->si_timerid; | |
548 | si32.si_overrun = si->si_overrun; | |
549 | break; | |
550 | case SI_MESGQ: | |
551 | si32.si_mqd = si->si_mqd; | |
552 | break; | |
553 | } | |
554 | ||
555 | memcpy(si, &si32, sizeof (si32)); | |
556 | #endif | |
557 | } | |
929edea9 | 558 | |
f6ac5f3d | 559 | /* Implement the "xfer_partial" target_ops method. */ |
7697fc9e | 560 | |
f6ac5f3d PA |
561 | enum target_xfer_status |
562 | fbsd_nat_target::xfer_partial (enum target_object object, | |
563 | const char *annex, gdb_byte *readbuf, | |
564 | const gdb_byte *writebuf, | |
565 | ULONGEST offset, ULONGEST len, | |
566 | ULONGEST *xfered_len) | |
7697fc9e | 567 | { |
e99b03dc | 568 | pid_t pid = inferior_ptid.pid (); |
7697fc9e JB |
569 | |
570 | switch (object) | |
571 | { | |
929edea9 JB |
572 | case TARGET_OBJECT_SIGNAL_INFO: |
573 | { | |
574 | struct ptrace_lwpinfo pl; | |
575 | size_t siginfo_size; | |
576 | ||
577 | /* FreeBSD doesn't support writing to $_siginfo. */ | |
578 | if (writebuf != NULL) | |
579 | return TARGET_XFER_E_IO; | |
580 | ||
581 | if (inferior_ptid.lwp_p ()) | |
582 | pid = inferior_ptid.lwp (); | |
583 | ||
584 | siginfo_size = fbsd_siginfo_size (); | |
585 | if (offset > siginfo_size) | |
586 | return TARGET_XFER_E_IO; | |
587 | ||
588 | if (ptrace (PT_LWPINFO, pid, (PTRACE_TYPE_ARG3) &pl, sizeof (pl)) == -1) | |
589 | return TARGET_XFER_E_IO; | |
590 | ||
591 | if (!(pl.pl_flags & PL_FLAG_SI)) | |
592 | return TARGET_XFER_E_IO; | |
593 | ||
594 | fbsd_convert_siginfo (&pl.pl_siginfo); | |
595 | if (offset + len > siginfo_size) | |
596 | len = siginfo_size - offset; | |
597 | ||
598 | memcpy (readbuf, ((gdb_byte *) &pl.pl_siginfo) + offset, len); | |
599 | *xfered_len = len; | |
600 | return TARGET_XFER_OK; | |
601 | } | |
f8eb6a9e | 602 | #ifdef KERN_PROC_AUXV |
7697fc9e JB |
603 | case TARGET_OBJECT_AUXV: |
604 | { | |
e4a26669 JB |
605 | gdb::byte_vector buf_storage; |
606 | gdb_byte *buf; | |
7697fc9e JB |
607 | size_t buflen; |
608 | int mib[4]; | |
609 | ||
610 | if (writebuf != NULL) | |
611 | return TARGET_XFER_E_IO; | |
612 | mib[0] = CTL_KERN; | |
613 | mib[1] = KERN_PROC; | |
614 | mib[2] = KERN_PROC_AUXV; | |
615 | mib[3] = pid; | |
616 | if (offset == 0) | |
617 | { | |
618 | buf = readbuf; | |
619 | buflen = len; | |
620 | } | |
621 | else | |
622 | { | |
623 | buflen = offset + len; | |
e4a26669 JB |
624 | buf_storage.resize (buflen); |
625 | buf = buf_storage.data (); | |
7697fc9e JB |
626 | } |
627 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
628 | { | |
629 | if (offset != 0) | |
630 | { | |
631 | if (buflen > offset) | |
632 | { | |
633 | buflen -= offset; | |
634 | memcpy (readbuf, buf + offset, buflen); | |
635 | } | |
636 | else | |
637 | buflen = 0; | |
638 | } | |
7697fc9e JB |
639 | *xfered_len = buflen; |
640 | return (buflen == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
641 | } | |
7697fc9e JB |
642 | return TARGET_XFER_E_IO; |
643 | } | |
f8eb6a9e JB |
644 | #endif |
645 | #if defined(KERN_PROC_VMMAP) && defined(KERN_PROC_PS_STRINGS) | |
739ab2e9 SS |
646 | case TARGET_OBJECT_FREEBSD_VMMAP: |
647 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
648 | { | |
649 | gdb::byte_vector buf_storage; | |
650 | gdb_byte *buf; | |
651 | size_t buflen; | |
652 | int mib[4]; | |
653 | ||
654 | int proc_target; | |
655 | uint32_t struct_size; | |
656 | switch (object) | |
657 | { | |
658 | case TARGET_OBJECT_FREEBSD_VMMAP: | |
659 | proc_target = KERN_PROC_VMMAP; | |
660 | struct_size = sizeof (struct kinfo_vmentry); | |
661 | break; | |
662 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
663 | proc_target = KERN_PROC_PS_STRINGS; | |
664 | struct_size = sizeof (void *); | |
665 | break; | |
666 | } | |
667 | ||
668 | if (writebuf != NULL) | |
669 | return TARGET_XFER_E_IO; | |
670 | ||
671 | mib[0] = CTL_KERN; | |
672 | mib[1] = KERN_PROC; | |
673 | mib[2] = proc_target; | |
674 | mib[3] = pid; | |
675 | ||
676 | if (sysctl (mib, 4, NULL, &buflen, NULL, 0) != 0) | |
677 | return TARGET_XFER_E_IO; | |
678 | buflen += sizeof (struct_size); | |
679 | ||
680 | if (offset >= buflen) | |
681 | { | |
682 | *xfered_len = 0; | |
683 | return TARGET_XFER_EOF; | |
684 | } | |
685 | ||
686 | buf_storage.resize (buflen); | |
687 | buf = buf_storage.data (); | |
688 | ||
689 | memcpy (buf, &struct_size, sizeof (struct_size)); | |
690 | buflen -= sizeof (struct_size); | |
691 | if (sysctl (mib, 4, buf + sizeof (struct_size), &buflen, NULL, 0) != 0) | |
692 | return TARGET_XFER_E_IO; | |
693 | buflen += sizeof (struct_size); | |
694 | ||
695 | if (buflen - offset < len) | |
696 | len = buflen - offset; | |
697 | memcpy (readbuf, buf + offset, len); | |
698 | *xfered_len = len; | |
699 | return TARGET_XFER_OK; | |
700 | } | |
f8eb6a9e | 701 | #endif |
7697fc9e | 702 | default: |
f6ac5f3d PA |
703 | return inf_ptrace_target::xfer_partial (object, annex, |
704 | readbuf, writebuf, offset, | |
705 | len, xfered_len); | |
7697fc9e JB |
706 | } |
707 | } | |
7697fc9e | 708 | |
491144b5 CB |
709 | static bool debug_fbsd_lwp; |
710 | static bool debug_fbsd_nat; | |
6e9567fe | 711 | |
6e9567fe JB |
712 | static void |
713 | show_fbsd_lwp_debug (struct ui_file *file, int from_tty, | |
714 | struct cmd_list_element *c, const char *value) | |
715 | { | |
716 | fprintf_filtered (file, _("Debugging of FreeBSD lwp module is %s.\n"), value); | |
717 | } | |
718 | ||
386a8676 JB |
719 | static void |
720 | show_fbsd_nat_debug (struct ui_file *file, int from_tty, | |
721 | struct cmd_list_element *c, const char *value) | |
722 | { | |
723 | fprintf_filtered (file, _("Debugging of FreeBSD native target is %s.\n"), | |
724 | value); | |
725 | } | |
726 | ||
c45ecc9d JB |
727 | #define fbsd_lwp_debug_printf(fmt, ...) \ |
728 | debug_prefixed_printf_cond (debug_fbsd_lwp, "fbsd-lwp", fmt, ##__VA_ARGS__) | |
729 | ||
730 | #define fbsd_nat_debug_printf(fmt, ...) \ | |
731 | debug_prefixed_printf_cond (debug_fbsd_nat, "fbsd-nat", fmt, ##__VA_ARGS__) | |
732 | ||
733 | ||
6e9567fe JB |
734 | /* |
735 | FreeBSD's first thread support was via a "reentrant" version of libc | |
736 | (libc_r) that first shipped in 2.2.7. This library multiplexed all | |
737 | of the threads in a process onto a single kernel thread. This | |
4c7bf4f9 | 738 | library was supported via the bsd-uthread target. |
6e9567fe JB |
739 | |
740 | FreeBSD 5.1 introduced two new threading libraries that made use of | |
741 | multiple kernel threads. The first (libkse) scheduled M user | |
742 | threads onto N (<= M) kernel threads (LWPs). The second (libthr) | |
743 | bound each user thread to a dedicated kernel thread. libkse shipped | |
744 | as the default threading library (libpthread). | |
745 | ||
746 | FreeBSD 5.3 added a libthread_db to abstract the interface across | |
747 | the various thread libraries (libc_r, libkse, and libthr). | |
748 | ||
749 | FreeBSD 7.0 switched the default threading library from from libkse | |
750 | to libpthread and removed libc_r. | |
751 | ||
752 | FreeBSD 8.0 removed libkse and the in-kernel support for it. The | |
753 | only threading library supported by 8.0 and later is libthr which | |
754 | ties each user thread directly to an LWP. To simplify the | |
755 | implementation, this target only supports LWP-backed threads using | |
756 | ptrace directly rather than libthread_db. | |
757 | ||
758 | FreeBSD 11.0 introduced LWP event reporting via PT_LWP_EVENTS. | |
759 | */ | |
760 | ||
761 | /* Return true if PTID is still active in the inferior. */ | |
762 | ||
57810aa7 | 763 | bool |
f6ac5f3d | 764 | fbsd_nat_target::thread_alive (ptid_t ptid) |
6e9567fe | 765 | { |
15a9e13e | 766 | if (ptid.lwp_p ()) |
6e9567fe JB |
767 | { |
768 | struct ptrace_lwpinfo pl; | |
769 | ||
e38504b3 | 770 | if (ptrace (PT_LWPINFO, ptid.lwp (), (caddr_t) &pl, sizeof pl) |
6e9567fe | 771 | == -1) |
57810aa7 | 772 | return false; |
6e9567fe JB |
773 | #ifdef PL_FLAG_EXITED |
774 | if (pl.pl_flags & PL_FLAG_EXITED) | |
57810aa7 | 775 | return false; |
6e9567fe JB |
776 | #endif |
777 | } | |
778 | ||
57810aa7 | 779 | return true; |
6e9567fe JB |
780 | } |
781 | ||
a068643d | 782 | /* Convert PTID to a string. */ |
6e9567fe | 783 | |
a068643d | 784 | std::string |
f6ac5f3d | 785 | fbsd_nat_target::pid_to_str (ptid_t ptid) |
6e9567fe JB |
786 | { |
787 | lwpid_t lwp; | |
788 | ||
e38504b3 | 789 | lwp = ptid.lwp (); |
6e9567fe JB |
790 | if (lwp != 0) |
791 | { | |
e99b03dc | 792 | int pid = ptid.pid (); |
6e9567fe | 793 | |
a068643d | 794 | return string_printf ("LWP %d of process %d", lwp, pid); |
6e9567fe JB |
795 | } |
796 | ||
797 | return normal_pid_to_str (ptid); | |
798 | } | |
799 | ||
800 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
801 | /* Return the name assigned to a thread by an application. Returns | |
802 | the string in a static buffer. */ | |
803 | ||
f6ac5f3d PA |
804 | const char * |
805 | fbsd_nat_target::thread_name (struct thread_info *thr) | |
6e9567fe JB |
806 | { |
807 | struct ptrace_lwpinfo pl; | |
808 | struct kinfo_proc kp; | |
e99b03dc | 809 | int pid = thr->ptid.pid (); |
e38504b3 | 810 | long lwp = thr->ptid.lwp (); |
6e9567fe JB |
811 | static char buf[sizeof pl.pl_tdname + 1]; |
812 | ||
813 | /* Note that ptrace_lwpinfo returns the process command in pl_tdname | |
814 | if a name has not been set explicitly. Return a NULL name in | |
815 | that case. */ | |
92fce24d JB |
816 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) |
817 | perror_with_name (_("Failed to fetch process information")); | |
6e9567fe JB |
818 | if (ptrace (PT_LWPINFO, lwp, (caddr_t) &pl, sizeof pl) == -1) |
819 | perror_with_name (("ptrace")); | |
820 | if (strcmp (kp.ki_comm, pl.pl_tdname) == 0) | |
821 | return NULL; | |
822 | xsnprintf (buf, sizeof buf, "%s", pl.pl_tdname); | |
823 | return buf; | |
824 | } | |
825 | #endif | |
826 | ||
da95a26c | 827 | /* Enable additional event reporting on new processes. |
6e9567fe | 828 | |
da95a26c JB |
829 | To catch fork events, PTRACE_FORK is set on every traced process |
830 | to enable stops on returns from fork or vfork. Note that both the | |
831 | parent and child will always stop, even if system call stops are | |
832 | not enabled. | |
833 | ||
834 | To catch LWP events, PTRACE_EVENTS is set on every traced process. | |
6e9567fe JB |
835 | This enables stops on the birth for new LWPs (excluding the "main" LWP) |
836 | and the death of LWPs (excluding the last LWP in a process). Note | |
837 | that unlike fork events, the LWP that creates a new LWP does not | |
838 | report an event. */ | |
839 | ||
840 | static void | |
da95a26c | 841 | fbsd_enable_proc_events (pid_t pid) |
6e9567fe | 842 | { |
da95a26c JB |
843 | #ifdef PT_GET_EVENT_MASK |
844 | int events; | |
845 | ||
846 | if (ptrace (PT_GET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, | |
847 | sizeof (events)) == -1) | |
848 | perror_with_name (("ptrace")); | |
849 | events |= PTRACE_FORK | PTRACE_LWP; | |
dbaed385 JB |
850 | #ifdef PTRACE_VFORK |
851 | events |= PTRACE_VFORK; | |
852 | #endif | |
da95a26c JB |
853 | if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, |
854 | sizeof (events)) == -1) | |
855 | perror_with_name (("ptrace")); | |
856 | #else | |
857 | #ifdef TDP_RFPPWAIT | |
858 | if (ptrace (PT_FOLLOW_FORK, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) | |
859 | perror_with_name (("ptrace")); | |
860 | #endif | |
861 | #ifdef PT_LWP_EVENTS | |
6e9567fe JB |
862 | if (ptrace (PT_LWP_EVENTS, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) |
863 | perror_with_name (("ptrace")); | |
6e9567fe | 864 | #endif |
da95a26c JB |
865 | #endif |
866 | } | |
6e9567fe JB |
867 | |
868 | /* Add threads for any new LWPs in a process. | |
869 | ||
870 | When LWP events are used, this function is only used to detect existing | |
871 | threads when attaching to a process. On older systems, this function is | |
872 | called to discover new threads each time the thread list is updated. */ | |
873 | ||
874 | static void | |
5b6d1e4f | 875 | fbsd_add_threads (fbsd_nat_target *target, pid_t pid) |
6e9567fe | 876 | { |
6e9567fe JB |
877 | int i, nlwps; |
878 | ||
5b6d1e4f | 879 | gdb_assert (!in_thread_list (target, ptid_t (pid))); |
6e9567fe JB |
880 | nlwps = ptrace (PT_GETNUMLWPS, pid, NULL, 0); |
881 | if (nlwps == -1) | |
882 | perror_with_name (("ptrace")); | |
883 | ||
329d5e7e | 884 | gdb::unique_xmalloc_ptr<lwpid_t[]> lwps (XCNEWVEC (lwpid_t, nlwps)); |
6e9567fe | 885 | |
e4a26669 | 886 | nlwps = ptrace (PT_GETLWPLIST, pid, (caddr_t) lwps.get (), nlwps); |
6e9567fe JB |
887 | if (nlwps == -1) |
888 | perror_with_name (("ptrace")); | |
889 | ||
890 | for (i = 0; i < nlwps; i++) | |
891 | { | |
fd79271b | 892 | ptid_t ptid = ptid_t (pid, lwps[i], 0); |
6e9567fe | 893 | |
5b6d1e4f | 894 | if (!in_thread_list (target, ptid)) |
6e9567fe JB |
895 | { |
896 | #ifdef PT_LWP_EVENTS | |
897 | struct ptrace_lwpinfo pl; | |
898 | ||
899 | /* Don't add exited threads. Note that this is only called | |
900 | when attaching to a multi-threaded process. */ | |
329d5e7e | 901 | if (ptrace (PT_LWPINFO, lwps[i], (caddr_t) &pl, sizeof pl) == -1) |
6e9567fe JB |
902 | perror_with_name (("ptrace")); |
903 | if (pl.pl_flags & PL_FLAG_EXITED) | |
904 | continue; | |
905 | #endif | |
c45ecc9d | 906 | fbsd_lwp_debug_printf ("adding thread for LWP %u", lwps[i]); |
5b6d1e4f | 907 | add_thread (target, ptid); |
6e9567fe JB |
908 | } |
909 | } | |
6e9567fe JB |
910 | } |
911 | ||
f6ac5f3d | 912 | /* Implement the "update_thread_list" target_ops method. */ |
6e9567fe | 913 | |
f6ac5f3d PA |
914 | void |
915 | fbsd_nat_target::update_thread_list () | |
6e9567fe JB |
916 | { |
917 | #ifdef PT_LWP_EVENTS | |
918 | /* With support for thread events, threads are added/deleted from the | |
919 | list as events are reported, so just try deleting exited threads. */ | |
920 | delete_exited_threads (); | |
921 | #else | |
922 | prune_threads (); | |
923 | ||
5b6d1e4f | 924 | fbsd_add_threads (this, inferior_ptid.pid ()); |
6e9567fe JB |
925 | #endif |
926 | } | |
927 | ||
e58e05d6 JB |
928 | #ifdef TDP_RFPPWAIT |
929 | /* | |
930 | To catch fork events, PT_FOLLOW_FORK is set on every traced process | |
931 | to enable stops on returns from fork or vfork. Note that both the | |
932 | parent and child will always stop, even if system call stops are not | |
933 | enabled. | |
934 | ||
935 | After a fork, both the child and parent process will stop and report | |
936 | an event. However, there is no guarantee of order. If the parent | |
937 | reports its stop first, then fbsd_wait explicitly waits for the new | |
938 | child before returning. If the child reports its stop first, then | |
939 | the event is saved on a list and ignored until the parent's stop is | |
940 | reported. fbsd_wait could have been changed to fetch the parent PID | |
941 | of the new child and used that to wait for the parent explicitly. | |
942 | However, if two threads in the parent fork at the same time, then | |
943 | the wait on the parent might return the "wrong" fork event. | |
944 | ||
945 | The initial version of PT_FOLLOW_FORK did not set PL_FLAG_CHILD for | |
946 | the new child process. This flag could be inferred by treating any | |
947 | events for an unknown pid as a new child. | |
948 | ||
949 | In addition, the initial version of PT_FOLLOW_FORK did not report a | |
950 | stop event for the parent process of a vfork until after the child | |
951 | process executed a new program or exited. The kernel was changed to | |
952 | defer the wait for exit or exec of the child until after posting the | |
953 | stop event shortly after the change to introduce PL_FLAG_CHILD. | |
954 | This could be worked around by reporting a vfork event when the | |
955 | child event posted and ignoring the subsequent event from the | |
956 | parent. | |
957 | ||
958 | This implementation requires both of these fixes for simplicity's | |
959 | sake. FreeBSD versions newer than 9.1 contain both fixes. | |
960 | */ | |
961 | ||
e8c6b620 | 962 | static std::list<ptid_t> fbsd_pending_children; |
e58e05d6 JB |
963 | |
964 | /* Record a new child process event that is reported before the | |
965 | corresponding fork event in the parent. */ | |
966 | ||
967 | static void | |
6e9567fe | 968 | fbsd_remember_child (ptid_t pid) |
e58e05d6 | 969 | { |
e8c6b620 | 970 | fbsd_pending_children.push_front (pid); |
e58e05d6 JB |
971 | } |
972 | ||
973 | /* Check for a previously-recorded new child process event for PID. | |
6e9567fe | 974 | If one is found, remove it from the list and return the PTID. */ |
e58e05d6 | 975 | |
6e9567fe | 976 | static ptid_t |
e58e05d6 JB |
977 | fbsd_is_child_pending (pid_t pid) |
978 | { | |
e8c6b620 JB |
979 | for (auto it = fbsd_pending_children.begin (); |
980 | it != fbsd_pending_children.end (); it++) | |
981 | if (it->pid () == pid) | |
982 | { | |
983 | ptid_t ptid = *it; | |
984 | fbsd_pending_children.erase (it); | |
985 | return ptid; | |
986 | } | |
6e9567fe | 987 | return null_ptid; |
e58e05d6 | 988 | } |
2c5c2a33 | 989 | |
dbaed385 | 990 | #ifndef PTRACE_VFORK |
e8c6b620 | 991 | static std::forward_list<ptid_t> fbsd_pending_vfork_done; |
2c5c2a33 JB |
992 | |
993 | /* Record a pending vfork done event. */ | |
994 | ||
995 | static void | |
996 | fbsd_add_vfork_done (ptid_t pid) | |
997 | { | |
e8c6b620 | 998 | fbsd_pending_vfork_done.push_front (pid); |
2c5c2a33 JB |
999 | } |
1000 | ||
1001 | /* Check for a pending vfork done event for a specific PID. */ | |
1002 | ||
1003 | static int | |
1004 | fbsd_is_vfork_done_pending (pid_t pid) | |
1005 | { | |
e8c6b620 JB |
1006 | for (auto it = fbsd_pending_vfork_done.begin (); |
1007 | it != fbsd_pending_vfork_done.end (); it++) | |
1008 | if (it->pid () == pid) | |
1009 | return 1; | |
2c5c2a33 JB |
1010 | return 0; |
1011 | } | |
1012 | ||
1013 | /* Check for a pending vfork done event. If one is found, remove it | |
1014 | from the list and return the PTID. */ | |
1015 | ||
ee950322 | 1016 | static ptid_t |
2c5c2a33 JB |
1017 | fbsd_next_vfork_done (void) |
1018 | { | |
e8c6b620 | 1019 | if (!fbsd_pending_vfork_done.empty ()) |
2c5c2a33 | 1020 | { |
e8c6b620 JB |
1021 | ptid_t ptid = fbsd_pending_vfork_done.front (); |
1022 | fbsd_pending_vfork_done.pop_front (); | |
2c5c2a33 JB |
1023 | return ptid; |
1024 | } | |
1025 | return null_ptid; | |
1026 | } | |
e58e05d6 | 1027 | #endif |
dbaed385 | 1028 | #endif |
e58e05d6 | 1029 | |
f6ac5f3d | 1030 | /* Implement the "resume" target_ops method. */ |
8607ea63 | 1031 | |
f6ac5f3d PA |
1032 | void |
1033 | fbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
8607ea63 | 1034 | { |
dbaed385 | 1035 | #if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK) |
2c5c2a33 JB |
1036 | pid_t pid; |
1037 | ||
1038 | /* Don't PT_CONTINUE a process which has a pending vfork done event. */ | |
d7e15655 | 1039 | if (minus_one_ptid == ptid) |
e99b03dc | 1040 | pid = inferior_ptid.pid (); |
2c5c2a33 | 1041 | else |
e99b03dc | 1042 | pid = ptid.pid (); |
2c5c2a33 JB |
1043 | if (fbsd_is_vfork_done_pending (pid)) |
1044 | return; | |
1045 | #endif | |
8607ea63 | 1046 | |
c45ecc9d JB |
1047 | fbsd_lwp_debug_printf ("ptid (%d, %ld, %ld)", ptid.pid (), ptid.lwp (), |
1048 | ptid.tid ()); | |
15a9e13e | 1049 | if (ptid.lwp_p ()) |
8607ea63 JB |
1050 | { |
1051 | /* If ptid is a specific LWP, suspend all other LWPs in the process. */ | |
5b6d1e4f | 1052 | inferior *inf = find_inferior_ptid (this, ptid); |
d56060f0 | 1053 | |
08036331 | 1054 | for (thread_info *tp : inf->non_exited_threads ()) |
dda83cd7 | 1055 | { |
08036331 | 1056 | int request; |
d56060f0 | 1057 | |
e38504b3 | 1058 | if (tp->ptid.lwp () == ptid.lwp ()) |
d56060f0 JB |
1059 | request = PT_RESUME; |
1060 | else | |
1061 | request = PT_SUSPEND; | |
1062 | ||
e38504b3 | 1063 | if (ptrace (request, tp->ptid.lwp (), NULL, 0) == -1) |
d56060f0 JB |
1064 | perror_with_name (("ptrace")); |
1065 | } | |
8607ea63 JB |
1066 | } |
1067 | else | |
1068 | { | |
1069 | /* If ptid is a wildcard, resume all matching threads (they won't run | |
1070 | until the process is continued however). */ | |
5b6d1e4f | 1071 | for (thread_info *tp : all_non_exited_threads (this, ptid)) |
08036331 PA |
1072 | if (ptrace (PT_RESUME, tp->ptid.lwp (), NULL, 0) == -1) |
1073 | perror_with_name (("ptrace")); | |
8607ea63 JB |
1074 | ptid = inferior_ptid; |
1075 | } | |
f169cfdc JB |
1076 | |
1077 | #if __FreeBSD_version < 1200052 | |
1078 | /* When multiple threads within a process wish to report STOPPED | |
1079 | events from wait(), the kernel picks one thread event as the | |
1080 | thread event to report. The chosen thread event is retrieved via | |
1081 | PT_LWPINFO by passing the process ID as the request pid. If | |
1082 | multiple events are pending, then the subsequent wait() after | |
1083 | resuming a process will report another STOPPED event after | |
1084 | resuming the process to handle the next thread event and so on. | |
1085 | ||
1086 | A single thread event is cleared as a side effect of resuming the | |
1087 | process with PT_CONTINUE, PT_STEP, etc. In older kernels, | |
1088 | however, the request pid was used to select which thread's event | |
1089 | was cleared rather than always clearing the event that was just | |
1090 | reported. To avoid clearing the event of the wrong LWP, always | |
1091 | pass the process ID instead of an LWP ID to PT_CONTINUE or | |
1092 | PT_SYSCALL. | |
1093 | ||
1094 | In the case of stepping, the process ID cannot be used with | |
1095 | PT_STEP since it would step the thread that reported an event | |
1096 | which may not be the thread indicated by PTID. For stepping, use | |
1097 | PT_SETSTEP to enable stepping on the desired thread before | |
1098 | resuming the process via PT_CONTINUE instead of using | |
1099 | PT_STEP. */ | |
1100 | if (step) | |
1101 | { | |
1102 | if (ptrace (PT_SETSTEP, get_ptrace_pid (ptid), NULL, 0) == -1) | |
1103 | perror_with_name (("ptrace")); | |
1104 | step = 0; | |
1105 | } | |
1106 | ptid = ptid_t (ptid.pid ()); | |
1107 | #endif | |
f6ac5f3d | 1108 | inf_ptrace_target::resume (ptid, step, signo); |
8607ea63 JB |
1109 | } |
1110 | ||
7efba073 JB |
1111 | #ifdef USE_SIGTRAP_SIGINFO |
1112 | /* Handle breakpoint and trace traps reported via SIGTRAP. If the | |
1113 | trap was a breakpoint or trace trap that should be reported to the | |
1114 | core, return true. */ | |
1115 | ||
1116 | static bool | |
5b6d1e4f PA |
1117 | fbsd_handle_debug_trap (fbsd_nat_target *target, ptid_t ptid, |
1118 | const struct ptrace_lwpinfo &pl) | |
7efba073 JB |
1119 | { |
1120 | ||
1121 | /* Ignore traps without valid siginfo or for signals other than | |
6d78332e JB |
1122 | SIGTRAP. |
1123 | ||
1124 | FreeBSD kernels prior to r341800 can return stale siginfo for at | |
1125 | least some events, but those events can be identified by | |
1126 | additional flags set in pl_flags. True breakpoint and | |
1127 | single-step traps should not have other flags set in | |
1128 | pl_flags. */ | |
1129 | if (pl.pl_flags != PL_FLAG_SI || pl.pl_siginfo.si_signo != SIGTRAP) | |
7efba073 JB |
1130 | return false; |
1131 | ||
1132 | /* Trace traps are either a single step or a hardware watchpoint or | |
1133 | breakpoint. */ | |
1134 | if (pl.pl_siginfo.si_code == TRAP_TRACE) | |
1135 | { | |
c45ecc9d | 1136 | fbsd_nat_debug_printf ("trace trap for LWP %ld", ptid.lwp ()); |
7efba073 JB |
1137 | return true; |
1138 | } | |
1139 | ||
1140 | if (pl.pl_siginfo.si_code == TRAP_BRKPT) | |
1141 | { | |
1142 | /* Fixup PC for the software breakpoint. */ | |
5b6d1e4f | 1143 | struct regcache *regcache = get_thread_regcache (target, ptid); |
7efba073 JB |
1144 | struct gdbarch *gdbarch = regcache->arch (); |
1145 | int decr_pc = gdbarch_decr_pc_after_break (gdbarch); | |
1146 | ||
c45ecc9d | 1147 | fbsd_nat_debug_printf ("sw breakpoint trap for LWP %ld", ptid.lwp ()); |
7efba073 JB |
1148 | if (decr_pc != 0) |
1149 | { | |
1150 | CORE_ADDR pc; | |
1151 | ||
1152 | pc = regcache_read_pc (regcache); | |
1153 | regcache_write_pc (regcache, pc - decr_pc); | |
1154 | } | |
1155 | return true; | |
1156 | } | |
1157 | ||
1158 | return false; | |
1159 | } | |
1160 | #endif | |
1161 | ||
e58e05d6 JB |
1162 | /* Wait for the child specified by PTID to do something. Return the |
1163 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
1164 | the status in *OURSTATUS. */ | |
1165 | ||
f6ac5f3d PA |
1166 | ptid_t |
1167 | fbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, | |
b60cea74 | 1168 | target_wait_flags target_options) |
e58e05d6 JB |
1169 | { |
1170 | ptid_t wptid; | |
1171 | ||
1172 | while (1) | |
1173 | { | |
dbaed385 | 1174 | #ifndef PTRACE_VFORK |
2c5c2a33 | 1175 | wptid = fbsd_next_vfork_done (); |
d7e15655 | 1176 | if (wptid != null_ptid) |
2c5c2a33 JB |
1177 | { |
1178 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1179 | return wptid; | |
1180 | } | |
dbaed385 | 1181 | #endif |
f6ac5f3d | 1182 | wptid = inf_ptrace_target::wait (ptid, ourstatus, target_options); |
e58e05d6 JB |
1183 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED) |
1184 | { | |
1185 | struct ptrace_lwpinfo pl; | |
1186 | pid_t pid; | |
1187 | int status; | |
1188 | ||
e99b03dc | 1189 | pid = wptid.pid (); |
6e9567fe | 1190 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) |
e58e05d6 JB |
1191 | perror_with_name (("ptrace")); |
1192 | ||
fd79271b | 1193 | wptid = ptid_t (pid, pl.pl_lwpid, 0); |
6e9567fe | 1194 | |
386a8676 JB |
1195 | if (debug_fbsd_nat) |
1196 | { | |
c45ecc9d JB |
1197 | fbsd_nat_debug_printf ("stop for LWP %u event %d flags %#x", |
1198 | pl.pl_lwpid, pl.pl_event, pl.pl_flags); | |
386a8676 | 1199 | if (pl.pl_flags & PL_FLAG_SI) |
c45ecc9d JB |
1200 | fbsd_nat_debug_printf ("si_signo %u si_code %u", |
1201 | pl.pl_siginfo.si_signo, | |
1202 | pl.pl_siginfo.si_code); | |
386a8676 JB |
1203 | } |
1204 | ||
6e9567fe JB |
1205 | #ifdef PT_LWP_EVENTS |
1206 | if (pl.pl_flags & PL_FLAG_EXITED) | |
1207 | { | |
1208 | /* If GDB attaches to a multi-threaded process, exiting | |
f6ac5f3d | 1209 | threads might be skipped during post_attach that |
6e9567fe JB |
1210 | have not yet reported their PL_FLAG_EXITED event. |
1211 | Ignore EXITED events for an unknown LWP. */ | |
5b6d1e4f | 1212 | thread_info *thr = find_thread_ptid (this, wptid); |
b7a08269 | 1213 | if (thr != nullptr) |
6e9567fe | 1214 | { |
c45ecc9d JB |
1215 | fbsd_lwp_debug_printf ("deleting thread for LWP %u", |
1216 | pl.pl_lwpid); | |
6e9567fe | 1217 | if (print_thread_events) |
a068643d TT |
1218 | printf_unfiltered (_("[%s exited]\n"), |
1219 | target_pid_to_str (wptid).c_str ()); | |
b7a08269 | 1220 | delete_thread (thr); |
6e9567fe JB |
1221 | } |
1222 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1223 | perror_with_name (("ptrace")); | |
1224 | continue; | |
1225 | } | |
1226 | #endif | |
1227 | ||
1228 | /* Switch to an LWP PTID on the first stop in a new process. | |
1229 | This is done after handling PL_FLAG_EXITED to avoid | |
1230 | switching to an exited LWP. It is done before checking | |
1231 | PL_FLAG_BORN in case the first stop reported after | |
1232 | attaching to an existing process is a PL_FLAG_BORN | |
1233 | event. */ | |
5b6d1e4f | 1234 | if (in_thread_list (this, ptid_t (pid))) |
6e9567fe | 1235 | { |
c45ecc9d JB |
1236 | fbsd_lwp_debug_printf ("using LWP %u for first thread", |
1237 | pl.pl_lwpid); | |
5b6d1e4f | 1238 | thread_change_ptid (this, ptid_t (pid), wptid); |
6e9567fe JB |
1239 | } |
1240 | ||
1241 | #ifdef PT_LWP_EVENTS | |
1242 | if (pl.pl_flags & PL_FLAG_BORN) | |
1243 | { | |
1244 | /* If GDB attaches to a multi-threaded process, newborn | |
1245 | threads might be added by fbsd_add_threads that have | |
1246 | not yet reported their PL_FLAG_BORN event. Ignore | |
1247 | BORN events for an already-known LWP. */ | |
5b6d1e4f | 1248 | if (!in_thread_list (this, wptid)) |
6e9567fe | 1249 | { |
c45ecc9d JB |
1250 | fbsd_lwp_debug_printf ("adding thread for LWP %u", |
1251 | pl.pl_lwpid); | |
5b6d1e4f | 1252 | add_thread (this, wptid); |
6e9567fe JB |
1253 | } |
1254 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
1255 | return wptid; | |
1256 | } | |
1257 | #endif | |
1258 | ||
e58e05d6 JB |
1259 | #ifdef TDP_RFPPWAIT |
1260 | if (pl.pl_flags & PL_FLAG_FORKED) | |
1261 | { | |
dbaed385 | 1262 | #ifndef PTRACE_VFORK |
e58e05d6 | 1263 | struct kinfo_proc kp; |
dbaed385 | 1264 | #endif |
6e9567fe | 1265 | ptid_t child_ptid; |
e58e05d6 JB |
1266 | pid_t child; |
1267 | ||
1268 | child = pl.pl_child_pid; | |
1269 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
dbaed385 JB |
1270 | #ifdef PTRACE_VFORK |
1271 | if (pl.pl_flags & PL_FLAG_VFORKED) | |
1272 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1273 | #endif | |
e58e05d6 JB |
1274 | |
1275 | /* Make sure the other end of the fork is stopped too. */ | |
6e9567fe | 1276 | child_ptid = fbsd_is_child_pending (child); |
d7e15655 | 1277 | if (child_ptid == null_ptid) |
e58e05d6 JB |
1278 | { |
1279 | pid = waitpid (child, &status, 0); | |
1280 | if (pid == -1) | |
1281 | perror_with_name (("waitpid")); | |
1282 | ||
1283 | gdb_assert (pid == child); | |
1284 | ||
1285 | if (ptrace (PT_LWPINFO, child, (caddr_t)&pl, sizeof pl) == -1) | |
1286 | perror_with_name (("ptrace")); | |
1287 | ||
1288 | gdb_assert (pl.pl_flags & PL_FLAG_CHILD); | |
fd79271b | 1289 | child_ptid = ptid_t (child, pl.pl_lwpid, 0); |
e58e05d6 JB |
1290 | } |
1291 | ||
5fa14c6b | 1292 | /* Enable additional events on the child process. */ |
e99b03dc | 1293 | fbsd_enable_proc_events (child_ptid.pid ()); |
5fa14c6b | 1294 | |
dbaed385 | 1295 | #ifndef PTRACE_VFORK |
e58e05d6 JB |
1296 | /* For vfork, the child process will have the P_PPWAIT |
1297 | flag set. */ | |
92fce24d JB |
1298 | if (fbsd_fetch_kinfo_proc (child, &kp)) |
1299 | { | |
1300 | if (kp.ki_flag & P_PPWAIT) | |
1301 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1302 | } | |
1303 | else | |
1304 | warning (_("Failed to fetch process information")); | |
dbaed385 | 1305 | #endif |
6e9567fe | 1306 | ourstatus->value.related_pid = child_ptid; |
e58e05d6 JB |
1307 | |
1308 | return wptid; | |
1309 | } | |
1310 | ||
1311 | if (pl.pl_flags & PL_FLAG_CHILD) | |
1312 | { | |
1313 | /* Remember that this child forked, but do not report it | |
1314 | until the parent reports its corresponding fork | |
1315 | event. */ | |
6e9567fe | 1316 | fbsd_remember_child (wptid); |
e58e05d6 JB |
1317 | continue; |
1318 | } | |
dbaed385 JB |
1319 | |
1320 | #ifdef PTRACE_VFORK | |
1321 | if (pl.pl_flags & PL_FLAG_VFORK_DONE) | |
1322 | { | |
1323 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1324 | return wptid; | |
1325 | } | |
1326 | #endif | |
e58e05d6 | 1327 | #endif |
d2b41ca0 | 1328 | |
d2b41ca0 JB |
1329 | if (pl.pl_flags & PL_FLAG_EXEC) |
1330 | { | |
1331 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
1332 | ourstatus->value.execd_pathname | |
f6ac5f3d | 1333 | = xstrdup (pid_to_exec_file (pid)); |
d2b41ca0 JB |
1334 | return wptid; |
1335 | } | |
e6cdd38e | 1336 | |
7efba073 | 1337 | #ifdef USE_SIGTRAP_SIGINFO |
5b6d1e4f | 1338 | if (fbsd_handle_debug_trap (this, wptid, pl)) |
7efba073 JB |
1339 | return wptid; |
1340 | #endif | |
1341 | ||
e6cdd38e JB |
1342 | /* Note that PL_FLAG_SCE is set for any event reported while |
1343 | a thread is executing a system call in the kernel. In | |
1344 | particular, signals that interrupt a sleep in a system | |
1345 | call will report this flag as part of their event. Stops | |
1346 | explicitly for system call entry and exit always use | |
1347 | SIGTRAP, so only treat SIGTRAP events as system call | |
1348 | entry/exit events. */ | |
1349 | if (pl.pl_flags & (PL_FLAG_SCE | PL_FLAG_SCX) | |
1350 | && ourstatus->value.sig == SIGTRAP) | |
1351 | { | |
1352 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1353 | if (catch_syscall_enabled ()) | |
1354 | { | |
1355 | if (catching_syscall_number (pl.pl_syscall_code)) | |
1356 | { | |
1357 | if (pl.pl_flags & PL_FLAG_SCE) | |
1358 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
1359 | else | |
1360 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
1361 | ourstatus->value.syscall_number = pl.pl_syscall_code; | |
1362 | return wptid; | |
1363 | } | |
1364 | } | |
1365 | #endif | |
1366 | /* If the core isn't interested in this event, just | |
1367 | continue the process explicitly and wait for another | |
1368 | event. Note that PT_SYSCALL is "sticky" on FreeBSD | |
1369 | and once system call stops are enabled on a process | |
1370 | it stops for all system call entries and exits. */ | |
1371 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1372 | perror_with_name (("ptrace")); | |
1373 | continue; | |
1374 | } | |
e58e05d6 JB |
1375 | } |
1376 | return wptid; | |
1377 | } | |
1378 | } | |
1379 | ||
7efba073 | 1380 | #ifdef USE_SIGTRAP_SIGINFO |
f6ac5f3d | 1381 | /* Implement the "stopped_by_sw_breakpoint" target_ops method. */ |
7efba073 | 1382 | |
57810aa7 | 1383 | bool |
f6ac5f3d | 1384 | fbsd_nat_target::stopped_by_sw_breakpoint () |
7efba073 JB |
1385 | { |
1386 | struct ptrace_lwpinfo pl; | |
1387 | ||
1388 | if (ptrace (PT_LWPINFO, get_ptrace_pid (inferior_ptid), (caddr_t) &pl, | |
1389 | sizeof pl) == -1) | |
57810aa7 | 1390 | return false; |
7efba073 | 1391 | |
6d78332e | 1392 | return (pl.pl_flags == PL_FLAG_SI |
7efba073 JB |
1393 | && pl.pl_siginfo.si_signo == SIGTRAP |
1394 | && pl.pl_siginfo.si_code == TRAP_BRKPT); | |
1395 | } | |
1396 | ||
f6ac5f3d | 1397 | /* Implement the "supports_stopped_by_sw_breakpoint" target_ops |
7efba073 JB |
1398 | method. */ |
1399 | ||
57810aa7 | 1400 | bool |
f6ac5f3d | 1401 | fbsd_nat_target::supports_stopped_by_sw_breakpoint () |
7efba073 | 1402 | { |
57810aa7 | 1403 | return true; |
7efba073 | 1404 | } |
7efba073 JB |
1405 | #endif |
1406 | ||
09db4332 JB |
1407 | #ifdef PROC_ASLR_CTL |
1408 | class maybe_disable_address_space_randomization | |
1409 | { | |
1410 | public: | |
1411 | explicit maybe_disable_address_space_randomization (bool disable_randomization) | |
1412 | { | |
1413 | if (disable_randomization) | |
1414 | { | |
1415 | if (procctl (P_PID, getpid (), PROC_ASLR_STATUS, &m_aslr_ctl) == -1) | |
1416 | { | |
1417 | warning (_("Failed to fetch current address space randomization " | |
1418 | "status: %s"), safe_strerror (errno)); | |
1419 | return; | |
1420 | } | |
1421 | ||
1422 | m_aslr_ctl &= ~PROC_ASLR_ACTIVE; | |
1423 | if (m_aslr_ctl == PROC_ASLR_FORCE_DISABLE) | |
1424 | return; | |
1425 | ||
1426 | int ctl = PROC_ASLR_FORCE_DISABLE; | |
1427 | if (procctl (P_PID, getpid (), PROC_ASLR_CTL, &ctl) == -1) | |
1428 | { | |
1429 | warning (_("Error disabling address space randomization: %s"), | |
1430 | safe_strerror (errno)); | |
1431 | return; | |
1432 | } | |
1433 | ||
1434 | m_aslr_ctl_set = true; | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | ~maybe_disable_address_space_randomization () | |
1439 | { | |
1440 | if (m_aslr_ctl_set) | |
1441 | { | |
1442 | if (procctl (P_PID, getpid (), PROC_ASLR_CTL, &m_aslr_ctl) == -1) | |
1443 | warning (_("Error restoring address space randomization: %s"), | |
1444 | safe_strerror (errno)); | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | DISABLE_COPY_AND_ASSIGN (maybe_disable_address_space_randomization); | |
1449 | ||
1450 | private: | |
1451 | bool m_aslr_ctl_set = false; | |
1452 | int m_aslr_ctl = 0; | |
1453 | }; | |
1454 | #endif | |
1455 | ||
1456 | void | |
1457 | fbsd_nat_target::create_inferior (const char *exec_file, | |
1458 | const std::string &allargs, | |
1459 | char **env, int from_tty) | |
1460 | { | |
1461 | #ifdef PROC_ASLR_CTL | |
1462 | maybe_disable_address_space_randomization restore_aslr_ctl | |
1463 | (disable_randomization); | |
1464 | #endif | |
1465 | ||
1466 | inf_ptrace_target::create_inferior (exec_file, allargs, env, from_tty); | |
1467 | } | |
1468 | ||
e58e05d6 JB |
1469 | #ifdef TDP_RFPPWAIT |
1470 | /* Target hook for follow_fork. On entry and at return inferior_ptid is | |
1471 | the ptid of the followed inferior. */ | |
1472 | ||
e97007b6 | 1473 | void |
5ab2fbf1 | 1474 | fbsd_nat_target::follow_fork (bool follow_child, bool detach_fork) |
e58e05d6 | 1475 | { |
bb2a62e6 | 1476 | if (!follow_child && detach_fork) |
e58e05d6 JB |
1477 | { |
1478 | struct thread_info *tp = inferior_thread (); | |
e99b03dc | 1479 | pid_t child_pid = tp->pending_follow.value.related_pid.pid (); |
e58e05d6 JB |
1480 | |
1481 | /* Breakpoints have already been detached from the child by | |
1482 | infrun.c. */ | |
1483 | ||
1484 | if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1) | |
1485 | perror_with_name (("ptrace")); | |
2c5c2a33 | 1486 | |
dbaed385 JB |
1487 | #ifndef PTRACE_VFORK |
1488 | if (tp->pending_follow.kind == TARGET_WAITKIND_VFORKED) | |
2c5c2a33 JB |
1489 | { |
1490 | /* We can't insert breakpoints until the child process has | |
1491 | finished with the shared memory region. The parent | |
1492 | process doesn't wait for the child process to exit or | |
1493 | exec until after it has been resumed from the ptrace stop | |
1494 | to report the fork. Once it has been resumed it doesn't | |
1495 | stop again before returning to userland, so there is no | |
1496 | reliable way to wait on the parent. | |
1497 | ||
1498 | We can't stay attached to the child to wait for an exec | |
1499 | or exit because it may invoke ptrace(PT_TRACE_ME) | |
1500 | (e.g. if the parent process is a debugger forking a new | |
1501 | child process). | |
1502 | ||
1503 | In the end, the best we can do is to make sure it runs | |
1504 | for a little while. Hopefully it will be out of range of | |
1505 | any breakpoints we reinsert. Usually this is only the | |
1506 | single-step breakpoint at vfork's return point. */ | |
1507 | ||
1508 | usleep (10000); | |
1509 | ||
1510 | /* Schedule a fake VFORK_DONE event to report on the next | |
1511 | wait. */ | |
1512 | fbsd_add_vfork_done (inferior_ptid); | |
1513 | } | |
dbaed385 | 1514 | #endif |
e58e05d6 | 1515 | } |
e58e05d6 JB |
1516 | } |
1517 | ||
f6ac5f3d PA |
1518 | int |
1519 | fbsd_nat_target::insert_fork_catchpoint (int pid) | |
e58e05d6 JB |
1520 | { |
1521 | return 0; | |
1522 | } | |
1523 | ||
f6ac5f3d PA |
1524 | int |
1525 | fbsd_nat_target::remove_fork_catchpoint (int pid) | |
e58e05d6 JB |
1526 | { |
1527 | return 0; | |
1528 | } | |
1529 | ||
f6ac5f3d PA |
1530 | int |
1531 | fbsd_nat_target::insert_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1532 | { |
1533 | return 0; | |
1534 | } | |
1535 | ||
f6ac5f3d PA |
1536 | int |
1537 | fbsd_nat_target::remove_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1538 | { |
1539 | return 0; | |
1540 | } | |
6e9567fe | 1541 | #endif |
e58e05d6 | 1542 | |
f6ac5f3d | 1543 | /* Implement the "post_startup_inferior" target_ops method. */ |
e58e05d6 | 1544 | |
f6ac5f3d PA |
1545 | void |
1546 | fbsd_nat_target::post_startup_inferior (ptid_t pid) | |
e58e05d6 | 1547 | { |
e99b03dc | 1548 | fbsd_enable_proc_events (pid.pid ()); |
e58e05d6 JB |
1549 | } |
1550 | ||
f6ac5f3d | 1551 | /* Implement the "post_attach" target_ops method. */ |
e58e05d6 | 1552 | |
f6ac5f3d PA |
1553 | void |
1554 | fbsd_nat_target::post_attach (int pid) | |
e58e05d6 | 1555 | { |
da95a26c | 1556 | fbsd_enable_proc_events (pid); |
5b6d1e4f | 1557 | fbsd_add_threads (this, pid); |
6e9567fe | 1558 | } |
d2b41ca0 | 1559 | |
fe5ddfc3 | 1560 | /* Traced processes always stop after exec. */ |
d2b41ca0 | 1561 | |
f6ac5f3d PA |
1562 | int |
1563 | fbsd_nat_target::insert_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1564 | { |
1565 | return 0; | |
1566 | } | |
1567 | ||
f6ac5f3d PA |
1568 | int |
1569 | fbsd_nat_target::remove_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1570 | { |
1571 | return 0; | |
1572 | } | |
e6cdd38e JB |
1573 | |
1574 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
f6ac5f3d PA |
1575 | int |
1576 | fbsd_nat_target::set_syscall_catchpoint (int pid, bool needed, | |
1577 | int any_count, | |
1578 | gdb::array_view<const int> syscall_counts) | |
e6cdd38e JB |
1579 | { |
1580 | ||
1581 | /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which | |
1582 | will catch all system call entries and exits. The system calls | |
1583 | are filtered by GDB rather than the kernel. */ | |
1584 | return 0; | |
1585 | } | |
1586 | #endif | |
e58e05d6 | 1587 | |
54904d81 JB |
1588 | bool |
1589 | fbsd_nat_target::supports_multi_process () | |
1590 | { | |
1591 | return true; | |
1592 | } | |
1593 | ||
09db4332 JB |
1594 | bool |
1595 | fbsd_nat_target::supports_disable_randomization () | |
1596 | { | |
1597 | #ifdef PROC_ASLR_CTL | |
1598 | return true; | |
1599 | #else | |
1600 | return false; | |
1601 | #endif | |
1602 | } | |
1603 | ||
6c265988 | 1604 | void _initialize_fbsd_nat (); |
6e9567fe | 1605 | void |
6c265988 | 1606 | _initialize_fbsd_nat () |
6e9567fe | 1607 | { |
6e9567fe JB |
1608 | add_setshow_boolean_cmd ("fbsd-lwp", class_maintenance, |
1609 | &debug_fbsd_lwp, _("\ | |
1610 | Set debugging of FreeBSD lwp module."), _("\ | |
1611 | Show debugging of FreeBSD lwp module."), _("\ | |
1612 | Enables printf debugging output."), | |
1613 | NULL, | |
1614 | &show_fbsd_lwp_debug, | |
1615 | &setdebuglist, &showdebuglist); | |
386a8676 JB |
1616 | add_setshow_boolean_cmd ("fbsd-nat", class_maintenance, |
1617 | &debug_fbsd_nat, _("\ | |
1618 | Set debugging of FreeBSD native target."), _("\ | |
1619 | Show debugging of FreeBSD native target."), _("\ | |
1620 | Enables printf debugging output."), | |
1621 | NULL, | |
1622 | &show_fbsd_nat_debug, | |
1623 | &setdebuglist, &showdebuglist); | |
6e9567fe | 1624 | } |