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); | |
aaa394b7 | 368 | printf_filtered ("TTY: %s\n", pulongest (kp.ki_tdev)); |
92fce24d JB |
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); | |
aaa394b7 JB |
386 | printf_filtered ("utime: %s.%06ld\n", |
387 | plongest (kp.ki_rusage.ru_utime.tv_sec), | |
92fce24d | 388 | kp.ki_rusage.ru_utime.tv_usec); |
aaa394b7 JB |
389 | printf_filtered ("stime: %s.%06ld\n", |
390 | plongest (kp.ki_rusage.ru_stime.tv_sec), | |
92fce24d | 391 | kp.ki_rusage.ru_stime.tv_usec); |
aaa394b7 JB |
392 | printf_filtered ("utime, children: %s.%06ld\n", |
393 | plongest (kp.ki_rusage_ch.ru_utime.tv_sec), | |
92fce24d | 394 | kp.ki_rusage_ch.ru_utime.tv_usec); |
aaa394b7 JB |
395 | printf_filtered ("stime, children: %s.%06ld\n", |
396 | plongest (kp.ki_rusage_ch.ru_stime.tv_sec), | |
92fce24d JB |
397 | kp.ki_rusage_ch.ru_stime.tv_usec); |
398 | printf_filtered ("'nice' value: %d\n", kp.ki_nice); | |
aaa394b7 JB |
399 | printf_filtered ("Start time: %s.%06ld\n", |
400 | plongest (kp.ki_start.tv_sec), | |
92fce24d JB |
401 | kp.ki_start.tv_usec); |
402 | pgtok = getpagesize () / 1024; | |
aaa394b7 JB |
403 | printf_filtered ("Virtual memory size: %s kB\n", |
404 | pulongest (kp.ki_size / 1024)); | |
405 | printf_filtered ("Data size: %s kB\n", | |
406 | pulongest (kp.ki_dsize * pgtok)); | |
407 | printf_filtered ("Stack size: %s kB\n", | |
408 | pulongest (kp.ki_ssize * pgtok)); | |
409 | printf_filtered ("Text size: %s kB\n", | |
410 | pulongest (kp.ki_tsize * pgtok)); | |
411 | printf_filtered ("Resident set size: %s kB\n", | |
412 | pulongest (kp.ki_rssize * pgtok)); | |
413 | printf_filtered ("Maximum RSS: %s kB\n", | |
414 | pulongest (kp.ki_rusage.ru_maxrss)); | |
92fce24d JB |
415 | printf_filtered ("Pending Signals: "); |
416 | for (int i = 0; i < _SIG_WORDS; i++) | |
417 | printf_filtered ("%08x ", kp.ki_siglist.__bits[i]); | |
418 | printf_filtered ("\n"); | |
419 | printf_filtered ("Ignored Signals: "); | |
420 | for (int i = 0; i < _SIG_WORDS; i++) | |
421 | printf_filtered ("%08x ", kp.ki_sigignore.__bits[i]); | |
422 | printf_filtered ("\n"); | |
423 | printf_filtered ("Caught Signals: "); | |
424 | for (int i = 0; i < _SIG_WORDS; i++) | |
425 | printf_filtered ("%08x ", kp.ki_sigcatch.__bits[i]); | |
426 | printf_filtered ("\n"); | |
427 | } | |
428 | } | |
f6ac5f3d PA |
429 | |
430 | return true; | |
92fce24d JB |
431 | } |
432 | ||
929edea9 JB |
433 | /* Return the size of siginfo for the current inferior. */ |
434 | ||
435 | #ifdef __LP64__ | |
436 | union sigval32 { | |
437 | int sival_int; | |
438 | uint32_t sival_ptr; | |
439 | }; | |
440 | ||
441 | /* This structure matches the naming and layout of `siginfo_t' in | |
442 | <sys/signal.h>. In particular, the `si_foo' macros defined in that | |
443 | header can be used with both types to copy fields in the `_reason' | |
444 | union. */ | |
445 | ||
446 | struct siginfo32 | |
447 | { | |
448 | int si_signo; | |
449 | int si_errno; | |
450 | int si_code; | |
451 | __pid_t si_pid; | |
452 | __uid_t si_uid; | |
453 | int si_status; | |
454 | uint32_t si_addr; | |
455 | union sigval32 si_value; | |
456 | union | |
457 | { | |
458 | struct | |
459 | { | |
460 | int _trapno; | |
461 | } _fault; | |
462 | struct | |
463 | { | |
464 | int _timerid; | |
465 | int _overrun; | |
466 | } _timer; | |
467 | struct | |
468 | { | |
469 | int _mqd; | |
470 | } _mesgq; | |
471 | struct | |
472 | { | |
473 | int32_t _band; | |
474 | } _poll; | |
475 | struct | |
476 | { | |
477 | int32_t __spare1__; | |
478 | int __spare2__[7]; | |
479 | } __spare__; | |
480 | } _reason; | |
481 | }; | |
482 | #endif | |
483 | ||
484 | static size_t | |
485 | fbsd_siginfo_size () | |
486 | { | |
487 | #ifdef __LP64__ | |
488 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
489 | ||
490 | /* Is the inferior 32-bit? If so, use the 32-bit siginfo size. */ | |
a181c0bf | 491 | if (gdbarch_long_bit (gdbarch) == 32) |
929edea9 JB |
492 | return sizeof (struct siginfo32); |
493 | #endif | |
494 | return sizeof (siginfo_t); | |
495 | } | |
496 | ||
497 | /* Convert a native 64-bit siginfo object to a 32-bit object. Note | |
498 | that FreeBSD doesn't support writing to $_siginfo, so this only | |
499 | needs to convert one way. */ | |
500 | ||
501 | static void | |
502 | fbsd_convert_siginfo (siginfo_t *si) | |
503 | { | |
504 | #ifdef __LP64__ | |
505 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
506 | ||
507 | /* Is the inferior 32-bit? If not, nothing to do. */ | |
a181c0bf | 508 | if (gdbarch_long_bit (gdbarch) != 32) |
929edea9 JB |
509 | return; |
510 | ||
511 | struct siginfo32 si32; | |
512 | ||
513 | si32.si_signo = si->si_signo; | |
514 | si32.si_errno = si->si_errno; | |
515 | si32.si_code = si->si_code; | |
516 | si32.si_pid = si->si_pid; | |
517 | si32.si_uid = si->si_uid; | |
518 | si32.si_status = si->si_status; | |
519 | si32.si_addr = (uintptr_t) si->si_addr; | |
520 | ||
521 | /* If sival_ptr is being used instead of sival_int on a big-endian | |
522 | platform, then sival_int will be zero since it holds the upper | |
523 | 32-bits of the pointer value. */ | |
524 | #if _BYTE_ORDER == _BIG_ENDIAN | |
525 | if (si->si_value.sival_int == 0) | |
0335ac6d | 526 | si32.si_value.sival_ptr = (uintptr_t) si->si_value.sival_ptr; |
929edea9 JB |
527 | else |
528 | si32.si_value.sival_int = si->si_value.sival_int; | |
529 | #else | |
530 | si32.si_value.sival_int = si->si_value.sival_int; | |
531 | #endif | |
532 | ||
533 | /* Always copy the spare fields and then possibly overwrite them for | |
534 | signal-specific or code-specific fields. */ | |
535 | si32._reason.__spare__.__spare1__ = si->_reason.__spare__.__spare1__; | |
536 | for (int i = 0; i < 7; i++) | |
537 | si32._reason.__spare__.__spare2__[i] = si->_reason.__spare__.__spare2__[i]; | |
538 | switch (si->si_signo) { | |
539 | case SIGILL: | |
540 | case SIGFPE: | |
541 | case SIGSEGV: | |
542 | case SIGBUS: | |
543 | si32.si_trapno = si->si_trapno; | |
544 | break; | |
545 | } | |
546 | switch (si->si_code) { | |
547 | case SI_TIMER: | |
548 | si32.si_timerid = si->si_timerid; | |
549 | si32.si_overrun = si->si_overrun; | |
550 | break; | |
551 | case SI_MESGQ: | |
552 | si32.si_mqd = si->si_mqd; | |
553 | break; | |
554 | } | |
555 | ||
556 | memcpy(si, &si32, sizeof (si32)); | |
557 | #endif | |
558 | } | |
929edea9 | 559 | |
f6ac5f3d | 560 | /* Implement the "xfer_partial" target_ops method. */ |
7697fc9e | 561 | |
f6ac5f3d PA |
562 | enum target_xfer_status |
563 | fbsd_nat_target::xfer_partial (enum target_object object, | |
564 | const char *annex, gdb_byte *readbuf, | |
565 | const gdb_byte *writebuf, | |
566 | ULONGEST offset, ULONGEST len, | |
567 | ULONGEST *xfered_len) | |
7697fc9e | 568 | { |
e99b03dc | 569 | pid_t pid = inferior_ptid.pid (); |
7697fc9e JB |
570 | |
571 | switch (object) | |
572 | { | |
929edea9 JB |
573 | case TARGET_OBJECT_SIGNAL_INFO: |
574 | { | |
575 | struct ptrace_lwpinfo pl; | |
576 | size_t siginfo_size; | |
577 | ||
578 | /* FreeBSD doesn't support writing to $_siginfo. */ | |
579 | if (writebuf != NULL) | |
580 | return TARGET_XFER_E_IO; | |
581 | ||
582 | if (inferior_ptid.lwp_p ()) | |
583 | pid = inferior_ptid.lwp (); | |
584 | ||
585 | siginfo_size = fbsd_siginfo_size (); | |
586 | if (offset > siginfo_size) | |
587 | return TARGET_XFER_E_IO; | |
588 | ||
589 | if (ptrace (PT_LWPINFO, pid, (PTRACE_TYPE_ARG3) &pl, sizeof (pl)) == -1) | |
590 | return TARGET_XFER_E_IO; | |
591 | ||
592 | if (!(pl.pl_flags & PL_FLAG_SI)) | |
593 | return TARGET_XFER_E_IO; | |
594 | ||
595 | fbsd_convert_siginfo (&pl.pl_siginfo); | |
596 | if (offset + len > siginfo_size) | |
597 | len = siginfo_size - offset; | |
598 | ||
599 | memcpy (readbuf, ((gdb_byte *) &pl.pl_siginfo) + offset, len); | |
600 | *xfered_len = len; | |
601 | return TARGET_XFER_OK; | |
602 | } | |
f8eb6a9e | 603 | #ifdef KERN_PROC_AUXV |
7697fc9e JB |
604 | case TARGET_OBJECT_AUXV: |
605 | { | |
e4a26669 JB |
606 | gdb::byte_vector buf_storage; |
607 | gdb_byte *buf; | |
7697fc9e JB |
608 | size_t buflen; |
609 | int mib[4]; | |
610 | ||
611 | if (writebuf != NULL) | |
612 | return TARGET_XFER_E_IO; | |
613 | mib[0] = CTL_KERN; | |
614 | mib[1] = KERN_PROC; | |
615 | mib[2] = KERN_PROC_AUXV; | |
616 | mib[3] = pid; | |
617 | if (offset == 0) | |
618 | { | |
619 | buf = readbuf; | |
620 | buflen = len; | |
621 | } | |
622 | else | |
623 | { | |
624 | buflen = offset + len; | |
e4a26669 JB |
625 | buf_storage.resize (buflen); |
626 | buf = buf_storage.data (); | |
7697fc9e JB |
627 | } |
628 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
629 | { | |
630 | if (offset != 0) | |
631 | { | |
632 | if (buflen > offset) | |
633 | { | |
634 | buflen -= offset; | |
635 | memcpy (readbuf, buf + offset, buflen); | |
636 | } | |
637 | else | |
638 | buflen = 0; | |
639 | } | |
7697fc9e JB |
640 | *xfered_len = buflen; |
641 | return (buflen == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
642 | } | |
7697fc9e JB |
643 | return TARGET_XFER_E_IO; |
644 | } | |
f8eb6a9e JB |
645 | #endif |
646 | #if defined(KERN_PROC_VMMAP) && defined(KERN_PROC_PS_STRINGS) | |
739ab2e9 SS |
647 | case TARGET_OBJECT_FREEBSD_VMMAP: |
648 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
649 | { | |
650 | gdb::byte_vector buf_storage; | |
651 | gdb_byte *buf; | |
652 | size_t buflen; | |
653 | int mib[4]; | |
654 | ||
655 | int proc_target; | |
656 | uint32_t struct_size; | |
657 | switch (object) | |
658 | { | |
659 | case TARGET_OBJECT_FREEBSD_VMMAP: | |
660 | proc_target = KERN_PROC_VMMAP; | |
661 | struct_size = sizeof (struct kinfo_vmentry); | |
662 | break; | |
663 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
664 | proc_target = KERN_PROC_PS_STRINGS; | |
665 | struct_size = sizeof (void *); | |
666 | break; | |
667 | } | |
668 | ||
669 | if (writebuf != NULL) | |
670 | return TARGET_XFER_E_IO; | |
671 | ||
672 | mib[0] = CTL_KERN; | |
673 | mib[1] = KERN_PROC; | |
674 | mib[2] = proc_target; | |
675 | mib[3] = pid; | |
676 | ||
677 | if (sysctl (mib, 4, NULL, &buflen, NULL, 0) != 0) | |
678 | return TARGET_XFER_E_IO; | |
679 | buflen += sizeof (struct_size); | |
680 | ||
681 | if (offset >= buflen) | |
682 | { | |
683 | *xfered_len = 0; | |
684 | return TARGET_XFER_EOF; | |
685 | } | |
686 | ||
687 | buf_storage.resize (buflen); | |
688 | buf = buf_storage.data (); | |
689 | ||
690 | memcpy (buf, &struct_size, sizeof (struct_size)); | |
691 | buflen -= sizeof (struct_size); | |
692 | if (sysctl (mib, 4, buf + sizeof (struct_size), &buflen, NULL, 0) != 0) | |
693 | return TARGET_XFER_E_IO; | |
694 | buflen += sizeof (struct_size); | |
695 | ||
696 | if (buflen - offset < len) | |
697 | len = buflen - offset; | |
698 | memcpy (readbuf, buf + offset, len); | |
699 | *xfered_len = len; | |
700 | return TARGET_XFER_OK; | |
701 | } | |
f8eb6a9e | 702 | #endif |
7697fc9e | 703 | default: |
f6ac5f3d PA |
704 | return inf_ptrace_target::xfer_partial (object, annex, |
705 | readbuf, writebuf, offset, | |
706 | len, xfered_len); | |
7697fc9e JB |
707 | } |
708 | } | |
7697fc9e | 709 | |
491144b5 CB |
710 | static bool debug_fbsd_lwp; |
711 | static bool debug_fbsd_nat; | |
6e9567fe | 712 | |
6e9567fe JB |
713 | static void |
714 | show_fbsd_lwp_debug (struct ui_file *file, int from_tty, | |
715 | struct cmd_list_element *c, const char *value) | |
716 | { | |
717 | fprintf_filtered (file, _("Debugging of FreeBSD lwp module is %s.\n"), value); | |
718 | } | |
719 | ||
386a8676 JB |
720 | static void |
721 | show_fbsd_nat_debug (struct ui_file *file, int from_tty, | |
722 | struct cmd_list_element *c, const char *value) | |
723 | { | |
724 | fprintf_filtered (file, _("Debugging of FreeBSD native target is %s.\n"), | |
725 | value); | |
726 | } | |
727 | ||
c45ecc9d JB |
728 | #define fbsd_lwp_debug_printf(fmt, ...) \ |
729 | debug_prefixed_printf_cond (debug_fbsd_lwp, "fbsd-lwp", fmt, ##__VA_ARGS__) | |
730 | ||
731 | #define fbsd_nat_debug_printf(fmt, ...) \ | |
732 | debug_prefixed_printf_cond (debug_fbsd_nat, "fbsd-nat", fmt, ##__VA_ARGS__) | |
733 | ||
734 | ||
6e9567fe JB |
735 | /* |
736 | FreeBSD's first thread support was via a "reentrant" version of libc | |
737 | (libc_r) that first shipped in 2.2.7. This library multiplexed all | |
738 | of the threads in a process onto a single kernel thread. This | |
4c7bf4f9 | 739 | library was supported via the bsd-uthread target. |
6e9567fe JB |
740 | |
741 | FreeBSD 5.1 introduced two new threading libraries that made use of | |
742 | multiple kernel threads. The first (libkse) scheduled M user | |
743 | threads onto N (<= M) kernel threads (LWPs). The second (libthr) | |
744 | bound each user thread to a dedicated kernel thread. libkse shipped | |
745 | as the default threading library (libpthread). | |
746 | ||
747 | FreeBSD 5.3 added a libthread_db to abstract the interface across | |
748 | the various thread libraries (libc_r, libkse, and libthr). | |
749 | ||
750 | FreeBSD 7.0 switched the default threading library from from libkse | |
751 | to libpthread and removed libc_r. | |
752 | ||
753 | FreeBSD 8.0 removed libkse and the in-kernel support for it. The | |
754 | only threading library supported by 8.0 and later is libthr which | |
755 | ties each user thread directly to an LWP. To simplify the | |
756 | implementation, this target only supports LWP-backed threads using | |
757 | ptrace directly rather than libthread_db. | |
758 | ||
759 | FreeBSD 11.0 introduced LWP event reporting via PT_LWP_EVENTS. | |
760 | */ | |
761 | ||
762 | /* Return true if PTID is still active in the inferior. */ | |
763 | ||
57810aa7 | 764 | bool |
f6ac5f3d | 765 | fbsd_nat_target::thread_alive (ptid_t ptid) |
6e9567fe | 766 | { |
15a9e13e | 767 | if (ptid.lwp_p ()) |
6e9567fe JB |
768 | { |
769 | struct ptrace_lwpinfo pl; | |
770 | ||
e38504b3 | 771 | if (ptrace (PT_LWPINFO, ptid.lwp (), (caddr_t) &pl, sizeof pl) |
6e9567fe | 772 | == -1) |
57810aa7 | 773 | return false; |
6e9567fe JB |
774 | #ifdef PL_FLAG_EXITED |
775 | if (pl.pl_flags & PL_FLAG_EXITED) | |
57810aa7 | 776 | return false; |
6e9567fe JB |
777 | #endif |
778 | } | |
779 | ||
57810aa7 | 780 | return true; |
6e9567fe JB |
781 | } |
782 | ||
a068643d | 783 | /* Convert PTID to a string. */ |
6e9567fe | 784 | |
a068643d | 785 | std::string |
f6ac5f3d | 786 | fbsd_nat_target::pid_to_str (ptid_t ptid) |
6e9567fe JB |
787 | { |
788 | lwpid_t lwp; | |
789 | ||
e38504b3 | 790 | lwp = ptid.lwp (); |
6e9567fe JB |
791 | if (lwp != 0) |
792 | { | |
e99b03dc | 793 | int pid = ptid.pid (); |
6e9567fe | 794 | |
a068643d | 795 | return string_printf ("LWP %d of process %d", lwp, pid); |
6e9567fe JB |
796 | } |
797 | ||
798 | return normal_pid_to_str (ptid); | |
799 | } | |
800 | ||
801 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
802 | /* Return the name assigned to a thread by an application. Returns | |
803 | the string in a static buffer. */ | |
804 | ||
f6ac5f3d PA |
805 | const char * |
806 | fbsd_nat_target::thread_name (struct thread_info *thr) | |
6e9567fe JB |
807 | { |
808 | struct ptrace_lwpinfo pl; | |
809 | struct kinfo_proc kp; | |
e99b03dc | 810 | int pid = thr->ptid.pid (); |
e38504b3 | 811 | long lwp = thr->ptid.lwp (); |
6e9567fe JB |
812 | static char buf[sizeof pl.pl_tdname + 1]; |
813 | ||
814 | /* Note that ptrace_lwpinfo returns the process command in pl_tdname | |
815 | if a name has not been set explicitly. Return a NULL name in | |
816 | that case. */ | |
92fce24d JB |
817 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) |
818 | perror_with_name (_("Failed to fetch process information")); | |
6e9567fe JB |
819 | if (ptrace (PT_LWPINFO, lwp, (caddr_t) &pl, sizeof pl) == -1) |
820 | perror_with_name (("ptrace")); | |
821 | if (strcmp (kp.ki_comm, pl.pl_tdname) == 0) | |
822 | return NULL; | |
823 | xsnprintf (buf, sizeof buf, "%s", pl.pl_tdname); | |
824 | return buf; | |
825 | } | |
826 | #endif | |
827 | ||
da95a26c | 828 | /* Enable additional event reporting on new processes. |
6e9567fe | 829 | |
da95a26c JB |
830 | To catch fork events, PTRACE_FORK is set on every traced process |
831 | to enable stops on returns from fork or vfork. Note that both the | |
832 | parent and child will always stop, even if system call stops are | |
833 | not enabled. | |
834 | ||
835 | To catch LWP events, PTRACE_EVENTS is set on every traced process. | |
6e9567fe JB |
836 | This enables stops on the birth for new LWPs (excluding the "main" LWP) |
837 | and the death of LWPs (excluding the last LWP in a process). Note | |
838 | that unlike fork events, the LWP that creates a new LWP does not | |
839 | report an event. */ | |
840 | ||
841 | static void | |
da95a26c | 842 | fbsd_enable_proc_events (pid_t pid) |
6e9567fe | 843 | { |
da95a26c JB |
844 | #ifdef PT_GET_EVENT_MASK |
845 | int events; | |
846 | ||
847 | if (ptrace (PT_GET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, | |
848 | sizeof (events)) == -1) | |
849 | perror_with_name (("ptrace")); | |
850 | events |= PTRACE_FORK | PTRACE_LWP; | |
dbaed385 JB |
851 | #ifdef PTRACE_VFORK |
852 | events |= PTRACE_VFORK; | |
853 | #endif | |
da95a26c JB |
854 | if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, |
855 | sizeof (events)) == -1) | |
856 | perror_with_name (("ptrace")); | |
857 | #else | |
858 | #ifdef TDP_RFPPWAIT | |
859 | if (ptrace (PT_FOLLOW_FORK, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) | |
860 | perror_with_name (("ptrace")); | |
861 | #endif | |
862 | #ifdef PT_LWP_EVENTS | |
6e9567fe JB |
863 | if (ptrace (PT_LWP_EVENTS, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) |
864 | perror_with_name (("ptrace")); | |
6e9567fe | 865 | #endif |
da95a26c JB |
866 | #endif |
867 | } | |
6e9567fe JB |
868 | |
869 | /* Add threads for any new LWPs in a process. | |
870 | ||
871 | When LWP events are used, this function is only used to detect existing | |
872 | threads when attaching to a process. On older systems, this function is | |
873 | called to discover new threads each time the thread list is updated. */ | |
874 | ||
875 | static void | |
5b6d1e4f | 876 | fbsd_add_threads (fbsd_nat_target *target, pid_t pid) |
6e9567fe | 877 | { |
6e9567fe JB |
878 | int i, nlwps; |
879 | ||
5b6d1e4f | 880 | gdb_assert (!in_thread_list (target, ptid_t (pid))); |
6e9567fe JB |
881 | nlwps = ptrace (PT_GETNUMLWPS, pid, NULL, 0); |
882 | if (nlwps == -1) | |
883 | perror_with_name (("ptrace")); | |
884 | ||
329d5e7e | 885 | gdb::unique_xmalloc_ptr<lwpid_t[]> lwps (XCNEWVEC (lwpid_t, nlwps)); |
6e9567fe | 886 | |
e4a26669 | 887 | nlwps = ptrace (PT_GETLWPLIST, pid, (caddr_t) lwps.get (), nlwps); |
6e9567fe JB |
888 | if (nlwps == -1) |
889 | perror_with_name (("ptrace")); | |
890 | ||
891 | for (i = 0; i < nlwps; i++) | |
892 | { | |
fd79271b | 893 | ptid_t ptid = ptid_t (pid, lwps[i], 0); |
6e9567fe | 894 | |
5b6d1e4f | 895 | if (!in_thread_list (target, ptid)) |
6e9567fe JB |
896 | { |
897 | #ifdef PT_LWP_EVENTS | |
898 | struct ptrace_lwpinfo pl; | |
899 | ||
900 | /* Don't add exited threads. Note that this is only called | |
901 | when attaching to a multi-threaded process. */ | |
329d5e7e | 902 | if (ptrace (PT_LWPINFO, lwps[i], (caddr_t) &pl, sizeof pl) == -1) |
6e9567fe JB |
903 | perror_with_name (("ptrace")); |
904 | if (pl.pl_flags & PL_FLAG_EXITED) | |
905 | continue; | |
906 | #endif | |
c45ecc9d | 907 | fbsd_lwp_debug_printf ("adding thread for LWP %u", lwps[i]); |
5b6d1e4f | 908 | add_thread (target, ptid); |
6e9567fe JB |
909 | } |
910 | } | |
6e9567fe JB |
911 | } |
912 | ||
f6ac5f3d | 913 | /* Implement the "update_thread_list" target_ops method. */ |
6e9567fe | 914 | |
f6ac5f3d PA |
915 | void |
916 | fbsd_nat_target::update_thread_list () | |
6e9567fe JB |
917 | { |
918 | #ifdef PT_LWP_EVENTS | |
919 | /* With support for thread events, threads are added/deleted from the | |
920 | list as events are reported, so just try deleting exited threads. */ | |
921 | delete_exited_threads (); | |
922 | #else | |
923 | prune_threads (); | |
924 | ||
5b6d1e4f | 925 | fbsd_add_threads (this, inferior_ptid.pid ()); |
6e9567fe JB |
926 | #endif |
927 | } | |
928 | ||
e58e05d6 JB |
929 | #ifdef TDP_RFPPWAIT |
930 | /* | |
931 | To catch fork events, PT_FOLLOW_FORK is set on every traced process | |
932 | to enable stops on returns from fork or vfork. Note that both the | |
933 | parent and child will always stop, even if system call stops are not | |
934 | enabled. | |
935 | ||
936 | After a fork, both the child and parent process will stop and report | |
937 | an event. However, there is no guarantee of order. If the parent | |
938 | reports its stop first, then fbsd_wait explicitly waits for the new | |
939 | child before returning. If the child reports its stop first, then | |
940 | the event is saved on a list and ignored until the parent's stop is | |
941 | reported. fbsd_wait could have been changed to fetch the parent PID | |
942 | of the new child and used that to wait for the parent explicitly. | |
943 | However, if two threads in the parent fork at the same time, then | |
944 | the wait on the parent might return the "wrong" fork event. | |
945 | ||
946 | The initial version of PT_FOLLOW_FORK did not set PL_FLAG_CHILD for | |
947 | the new child process. This flag could be inferred by treating any | |
948 | events for an unknown pid as a new child. | |
949 | ||
950 | In addition, the initial version of PT_FOLLOW_FORK did not report a | |
951 | stop event for the parent process of a vfork until after the child | |
952 | process executed a new program or exited. The kernel was changed to | |
953 | defer the wait for exit or exec of the child until after posting the | |
954 | stop event shortly after the change to introduce PL_FLAG_CHILD. | |
955 | This could be worked around by reporting a vfork event when the | |
956 | child event posted and ignoring the subsequent event from the | |
957 | parent. | |
958 | ||
959 | This implementation requires both of these fixes for simplicity's | |
960 | sake. FreeBSD versions newer than 9.1 contain both fixes. | |
961 | */ | |
962 | ||
e8c6b620 | 963 | static std::list<ptid_t> fbsd_pending_children; |
e58e05d6 JB |
964 | |
965 | /* Record a new child process event that is reported before the | |
966 | corresponding fork event in the parent. */ | |
967 | ||
968 | static void | |
6e9567fe | 969 | fbsd_remember_child (ptid_t pid) |
e58e05d6 | 970 | { |
e8c6b620 | 971 | fbsd_pending_children.push_front (pid); |
e58e05d6 JB |
972 | } |
973 | ||
974 | /* Check for a previously-recorded new child process event for PID. | |
6e9567fe | 975 | If one is found, remove it from the list and return the PTID. */ |
e58e05d6 | 976 | |
6e9567fe | 977 | static ptid_t |
e58e05d6 JB |
978 | fbsd_is_child_pending (pid_t pid) |
979 | { | |
e8c6b620 JB |
980 | for (auto it = fbsd_pending_children.begin (); |
981 | it != fbsd_pending_children.end (); it++) | |
982 | if (it->pid () == pid) | |
983 | { | |
984 | ptid_t ptid = *it; | |
985 | fbsd_pending_children.erase (it); | |
986 | return ptid; | |
987 | } | |
6e9567fe | 988 | return null_ptid; |
e58e05d6 | 989 | } |
2c5c2a33 | 990 | |
dbaed385 | 991 | #ifndef PTRACE_VFORK |
e8c6b620 | 992 | static std::forward_list<ptid_t> fbsd_pending_vfork_done; |
2c5c2a33 JB |
993 | |
994 | /* Record a pending vfork done event. */ | |
995 | ||
996 | static void | |
997 | fbsd_add_vfork_done (ptid_t pid) | |
998 | { | |
e8c6b620 | 999 | fbsd_pending_vfork_done.push_front (pid); |
2c5c2a33 JB |
1000 | } |
1001 | ||
1002 | /* Check for a pending vfork done event for a specific PID. */ | |
1003 | ||
1004 | static int | |
1005 | fbsd_is_vfork_done_pending (pid_t pid) | |
1006 | { | |
e8c6b620 JB |
1007 | for (auto it = fbsd_pending_vfork_done.begin (); |
1008 | it != fbsd_pending_vfork_done.end (); it++) | |
1009 | if (it->pid () == pid) | |
1010 | return 1; | |
2c5c2a33 JB |
1011 | return 0; |
1012 | } | |
1013 | ||
1014 | /* Check for a pending vfork done event. If one is found, remove it | |
1015 | from the list and return the PTID. */ | |
1016 | ||
ee950322 | 1017 | static ptid_t |
2c5c2a33 JB |
1018 | fbsd_next_vfork_done (void) |
1019 | { | |
e8c6b620 | 1020 | if (!fbsd_pending_vfork_done.empty ()) |
2c5c2a33 | 1021 | { |
e8c6b620 JB |
1022 | ptid_t ptid = fbsd_pending_vfork_done.front (); |
1023 | fbsd_pending_vfork_done.pop_front (); | |
2c5c2a33 JB |
1024 | return ptid; |
1025 | } | |
1026 | return null_ptid; | |
1027 | } | |
e58e05d6 | 1028 | #endif |
dbaed385 | 1029 | #endif |
e58e05d6 | 1030 | |
f6ac5f3d | 1031 | /* Implement the "resume" target_ops method. */ |
8607ea63 | 1032 | |
f6ac5f3d PA |
1033 | void |
1034 | fbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
8607ea63 | 1035 | { |
dbaed385 | 1036 | #if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK) |
2c5c2a33 JB |
1037 | pid_t pid; |
1038 | ||
1039 | /* Don't PT_CONTINUE a process which has a pending vfork done event. */ | |
d7e15655 | 1040 | if (minus_one_ptid == ptid) |
e99b03dc | 1041 | pid = inferior_ptid.pid (); |
2c5c2a33 | 1042 | else |
e99b03dc | 1043 | pid = ptid.pid (); |
2c5c2a33 JB |
1044 | if (fbsd_is_vfork_done_pending (pid)) |
1045 | return; | |
1046 | #endif | |
8607ea63 | 1047 | |
c45ecc9d JB |
1048 | fbsd_lwp_debug_printf ("ptid (%d, %ld, %ld)", ptid.pid (), ptid.lwp (), |
1049 | ptid.tid ()); | |
15a9e13e | 1050 | if (ptid.lwp_p ()) |
8607ea63 JB |
1051 | { |
1052 | /* If ptid is a specific LWP, suspend all other LWPs in the process. */ | |
5b6d1e4f | 1053 | inferior *inf = find_inferior_ptid (this, ptid); |
d56060f0 | 1054 | |
08036331 | 1055 | for (thread_info *tp : inf->non_exited_threads ()) |
dda83cd7 | 1056 | { |
08036331 | 1057 | int request; |
d56060f0 | 1058 | |
e38504b3 | 1059 | if (tp->ptid.lwp () == ptid.lwp ()) |
d56060f0 JB |
1060 | request = PT_RESUME; |
1061 | else | |
1062 | request = PT_SUSPEND; | |
1063 | ||
e38504b3 | 1064 | if (ptrace (request, tp->ptid.lwp (), NULL, 0) == -1) |
d56060f0 JB |
1065 | perror_with_name (("ptrace")); |
1066 | } | |
8607ea63 JB |
1067 | } |
1068 | else | |
1069 | { | |
1070 | /* If ptid is a wildcard, resume all matching threads (they won't run | |
1071 | until the process is continued however). */ | |
5b6d1e4f | 1072 | for (thread_info *tp : all_non_exited_threads (this, ptid)) |
08036331 PA |
1073 | if (ptrace (PT_RESUME, tp->ptid.lwp (), NULL, 0) == -1) |
1074 | perror_with_name (("ptrace")); | |
8607ea63 JB |
1075 | ptid = inferior_ptid; |
1076 | } | |
f169cfdc JB |
1077 | |
1078 | #if __FreeBSD_version < 1200052 | |
1079 | /* When multiple threads within a process wish to report STOPPED | |
1080 | events from wait(), the kernel picks one thread event as the | |
1081 | thread event to report. The chosen thread event is retrieved via | |
1082 | PT_LWPINFO by passing the process ID as the request pid. If | |
1083 | multiple events are pending, then the subsequent wait() after | |
1084 | resuming a process will report another STOPPED event after | |
1085 | resuming the process to handle the next thread event and so on. | |
1086 | ||
1087 | A single thread event is cleared as a side effect of resuming the | |
1088 | process with PT_CONTINUE, PT_STEP, etc. In older kernels, | |
1089 | however, the request pid was used to select which thread's event | |
1090 | was cleared rather than always clearing the event that was just | |
1091 | reported. To avoid clearing the event of the wrong LWP, always | |
1092 | pass the process ID instead of an LWP ID to PT_CONTINUE or | |
1093 | PT_SYSCALL. | |
1094 | ||
1095 | In the case of stepping, the process ID cannot be used with | |
1096 | PT_STEP since it would step the thread that reported an event | |
1097 | which may not be the thread indicated by PTID. For stepping, use | |
1098 | PT_SETSTEP to enable stepping on the desired thread before | |
1099 | resuming the process via PT_CONTINUE instead of using | |
1100 | PT_STEP. */ | |
1101 | if (step) | |
1102 | { | |
1103 | if (ptrace (PT_SETSTEP, get_ptrace_pid (ptid), NULL, 0) == -1) | |
1104 | perror_with_name (("ptrace")); | |
1105 | step = 0; | |
1106 | } | |
1107 | ptid = ptid_t (ptid.pid ()); | |
1108 | #endif | |
f6ac5f3d | 1109 | inf_ptrace_target::resume (ptid, step, signo); |
8607ea63 JB |
1110 | } |
1111 | ||
7efba073 JB |
1112 | #ifdef USE_SIGTRAP_SIGINFO |
1113 | /* Handle breakpoint and trace traps reported via SIGTRAP. If the | |
1114 | trap was a breakpoint or trace trap that should be reported to the | |
1115 | core, return true. */ | |
1116 | ||
1117 | static bool | |
5b6d1e4f PA |
1118 | fbsd_handle_debug_trap (fbsd_nat_target *target, ptid_t ptid, |
1119 | const struct ptrace_lwpinfo &pl) | |
7efba073 JB |
1120 | { |
1121 | ||
1122 | /* Ignore traps without valid siginfo or for signals other than | |
6d78332e JB |
1123 | SIGTRAP. |
1124 | ||
1125 | FreeBSD kernels prior to r341800 can return stale siginfo for at | |
1126 | least some events, but those events can be identified by | |
1127 | additional flags set in pl_flags. True breakpoint and | |
1128 | single-step traps should not have other flags set in | |
1129 | pl_flags. */ | |
1130 | if (pl.pl_flags != PL_FLAG_SI || pl.pl_siginfo.si_signo != SIGTRAP) | |
7efba073 JB |
1131 | return false; |
1132 | ||
1133 | /* Trace traps are either a single step or a hardware watchpoint or | |
1134 | breakpoint. */ | |
1135 | if (pl.pl_siginfo.si_code == TRAP_TRACE) | |
1136 | { | |
c45ecc9d | 1137 | fbsd_nat_debug_printf ("trace trap for LWP %ld", ptid.lwp ()); |
7efba073 JB |
1138 | return true; |
1139 | } | |
1140 | ||
1141 | if (pl.pl_siginfo.si_code == TRAP_BRKPT) | |
1142 | { | |
1143 | /* Fixup PC for the software breakpoint. */ | |
5b6d1e4f | 1144 | struct regcache *regcache = get_thread_regcache (target, ptid); |
7efba073 JB |
1145 | struct gdbarch *gdbarch = regcache->arch (); |
1146 | int decr_pc = gdbarch_decr_pc_after_break (gdbarch); | |
1147 | ||
c45ecc9d | 1148 | fbsd_nat_debug_printf ("sw breakpoint trap for LWP %ld", ptid.lwp ()); |
7efba073 JB |
1149 | if (decr_pc != 0) |
1150 | { | |
1151 | CORE_ADDR pc; | |
1152 | ||
1153 | pc = regcache_read_pc (regcache); | |
1154 | regcache_write_pc (regcache, pc - decr_pc); | |
1155 | } | |
1156 | return true; | |
1157 | } | |
1158 | ||
1159 | return false; | |
1160 | } | |
1161 | #endif | |
1162 | ||
e58e05d6 JB |
1163 | /* Wait for the child specified by PTID to do something. Return the |
1164 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
1165 | the status in *OURSTATUS. */ | |
1166 | ||
f6ac5f3d PA |
1167 | ptid_t |
1168 | fbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, | |
b60cea74 | 1169 | target_wait_flags target_options) |
e58e05d6 JB |
1170 | { |
1171 | ptid_t wptid; | |
1172 | ||
1173 | while (1) | |
1174 | { | |
dbaed385 | 1175 | #ifndef PTRACE_VFORK |
2c5c2a33 | 1176 | wptid = fbsd_next_vfork_done (); |
d7e15655 | 1177 | if (wptid != null_ptid) |
2c5c2a33 JB |
1178 | { |
1179 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1180 | return wptid; | |
1181 | } | |
dbaed385 | 1182 | #endif |
f6ac5f3d | 1183 | wptid = inf_ptrace_target::wait (ptid, ourstatus, target_options); |
e58e05d6 JB |
1184 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED) |
1185 | { | |
1186 | struct ptrace_lwpinfo pl; | |
1187 | pid_t pid; | |
1188 | int status; | |
1189 | ||
e99b03dc | 1190 | pid = wptid.pid (); |
6e9567fe | 1191 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) |
e58e05d6 JB |
1192 | perror_with_name (("ptrace")); |
1193 | ||
fd79271b | 1194 | wptid = ptid_t (pid, pl.pl_lwpid, 0); |
6e9567fe | 1195 | |
386a8676 JB |
1196 | if (debug_fbsd_nat) |
1197 | { | |
c45ecc9d JB |
1198 | fbsd_nat_debug_printf ("stop for LWP %u event %d flags %#x", |
1199 | pl.pl_lwpid, pl.pl_event, pl.pl_flags); | |
386a8676 | 1200 | if (pl.pl_flags & PL_FLAG_SI) |
c45ecc9d JB |
1201 | fbsd_nat_debug_printf ("si_signo %u si_code %u", |
1202 | pl.pl_siginfo.si_signo, | |
1203 | pl.pl_siginfo.si_code); | |
386a8676 JB |
1204 | } |
1205 | ||
6e9567fe JB |
1206 | #ifdef PT_LWP_EVENTS |
1207 | if (pl.pl_flags & PL_FLAG_EXITED) | |
1208 | { | |
1209 | /* If GDB attaches to a multi-threaded process, exiting | |
f6ac5f3d | 1210 | threads might be skipped during post_attach that |
6e9567fe JB |
1211 | have not yet reported their PL_FLAG_EXITED event. |
1212 | Ignore EXITED events for an unknown LWP. */ | |
5b6d1e4f | 1213 | thread_info *thr = find_thread_ptid (this, wptid); |
b7a08269 | 1214 | if (thr != nullptr) |
6e9567fe | 1215 | { |
c45ecc9d JB |
1216 | fbsd_lwp_debug_printf ("deleting thread for LWP %u", |
1217 | pl.pl_lwpid); | |
6e9567fe | 1218 | if (print_thread_events) |
a068643d TT |
1219 | printf_unfiltered (_("[%s exited]\n"), |
1220 | target_pid_to_str (wptid).c_str ()); | |
b7a08269 | 1221 | delete_thread (thr); |
6e9567fe JB |
1222 | } |
1223 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1224 | perror_with_name (("ptrace")); | |
1225 | continue; | |
1226 | } | |
1227 | #endif | |
1228 | ||
1229 | /* Switch to an LWP PTID on the first stop in a new process. | |
1230 | This is done after handling PL_FLAG_EXITED to avoid | |
1231 | switching to an exited LWP. It is done before checking | |
1232 | PL_FLAG_BORN in case the first stop reported after | |
1233 | attaching to an existing process is a PL_FLAG_BORN | |
1234 | event. */ | |
5b6d1e4f | 1235 | if (in_thread_list (this, ptid_t (pid))) |
6e9567fe | 1236 | { |
c45ecc9d JB |
1237 | fbsd_lwp_debug_printf ("using LWP %u for first thread", |
1238 | pl.pl_lwpid); | |
5b6d1e4f | 1239 | thread_change_ptid (this, ptid_t (pid), wptid); |
6e9567fe JB |
1240 | } |
1241 | ||
1242 | #ifdef PT_LWP_EVENTS | |
1243 | if (pl.pl_flags & PL_FLAG_BORN) | |
1244 | { | |
1245 | /* If GDB attaches to a multi-threaded process, newborn | |
1246 | threads might be added by fbsd_add_threads that have | |
1247 | not yet reported their PL_FLAG_BORN event. Ignore | |
1248 | BORN events for an already-known LWP. */ | |
5b6d1e4f | 1249 | if (!in_thread_list (this, wptid)) |
6e9567fe | 1250 | { |
c45ecc9d JB |
1251 | fbsd_lwp_debug_printf ("adding thread for LWP %u", |
1252 | pl.pl_lwpid); | |
5b6d1e4f | 1253 | add_thread (this, wptid); |
6e9567fe JB |
1254 | } |
1255 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
1256 | return wptid; | |
1257 | } | |
1258 | #endif | |
1259 | ||
e58e05d6 JB |
1260 | #ifdef TDP_RFPPWAIT |
1261 | if (pl.pl_flags & PL_FLAG_FORKED) | |
1262 | { | |
dbaed385 | 1263 | #ifndef PTRACE_VFORK |
e58e05d6 | 1264 | struct kinfo_proc kp; |
dbaed385 | 1265 | #endif |
6e9567fe | 1266 | ptid_t child_ptid; |
e58e05d6 JB |
1267 | pid_t child; |
1268 | ||
1269 | child = pl.pl_child_pid; | |
1270 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
dbaed385 JB |
1271 | #ifdef PTRACE_VFORK |
1272 | if (pl.pl_flags & PL_FLAG_VFORKED) | |
1273 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1274 | #endif | |
e58e05d6 JB |
1275 | |
1276 | /* Make sure the other end of the fork is stopped too. */ | |
6e9567fe | 1277 | child_ptid = fbsd_is_child_pending (child); |
d7e15655 | 1278 | if (child_ptid == null_ptid) |
e58e05d6 JB |
1279 | { |
1280 | pid = waitpid (child, &status, 0); | |
1281 | if (pid == -1) | |
1282 | perror_with_name (("waitpid")); | |
1283 | ||
1284 | gdb_assert (pid == child); | |
1285 | ||
1286 | if (ptrace (PT_LWPINFO, child, (caddr_t)&pl, sizeof pl) == -1) | |
1287 | perror_with_name (("ptrace")); | |
1288 | ||
1289 | gdb_assert (pl.pl_flags & PL_FLAG_CHILD); | |
fd79271b | 1290 | child_ptid = ptid_t (child, pl.pl_lwpid, 0); |
e58e05d6 JB |
1291 | } |
1292 | ||
5fa14c6b | 1293 | /* Enable additional events on the child process. */ |
e99b03dc | 1294 | fbsd_enable_proc_events (child_ptid.pid ()); |
5fa14c6b | 1295 | |
dbaed385 | 1296 | #ifndef PTRACE_VFORK |
e58e05d6 JB |
1297 | /* For vfork, the child process will have the P_PPWAIT |
1298 | flag set. */ | |
92fce24d JB |
1299 | if (fbsd_fetch_kinfo_proc (child, &kp)) |
1300 | { | |
1301 | if (kp.ki_flag & P_PPWAIT) | |
1302 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1303 | } | |
1304 | else | |
1305 | warning (_("Failed to fetch process information")); | |
dbaed385 | 1306 | #endif |
6e9567fe | 1307 | ourstatus->value.related_pid = child_ptid; |
e58e05d6 JB |
1308 | |
1309 | return wptid; | |
1310 | } | |
1311 | ||
1312 | if (pl.pl_flags & PL_FLAG_CHILD) | |
1313 | { | |
1314 | /* Remember that this child forked, but do not report it | |
1315 | until the parent reports its corresponding fork | |
1316 | event. */ | |
6e9567fe | 1317 | fbsd_remember_child (wptid); |
e58e05d6 JB |
1318 | continue; |
1319 | } | |
dbaed385 JB |
1320 | |
1321 | #ifdef PTRACE_VFORK | |
1322 | if (pl.pl_flags & PL_FLAG_VFORK_DONE) | |
1323 | { | |
1324 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1325 | return wptid; | |
1326 | } | |
1327 | #endif | |
e58e05d6 | 1328 | #endif |
d2b41ca0 | 1329 | |
d2b41ca0 JB |
1330 | if (pl.pl_flags & PL_FLAG_EXEC) |
1331 | { | |
1332 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
1333 | ourstatus->value.execd_pathname | |
f6ac5f3d | 1334 | = xstrdup (pid_to_exec_file (pid)); |
d2b41ca0 JB |
1335 | return wptid; |
1336 | } | |
e6cdd38e | 1337 | |
7efba073 | 1338 | #ifdef USE_SIGTRAP_SIGINFO |
5b6d1e4f | 1339 | if (fbsd_handle_debug_trap (this, wptid, pl)) |
7efba073 JB |
1340 | return wptid; |
1341 | #endif | |
1342 | ||
e6cdd38e JB |
1343 | /* Note that PL_FLAG_SCE is set for any event reported while |
1344 | a thread is executing a system call in the kernel. In | |
1345 | particular, signals that interrupt a sleep in a system | |
1346 | call will report this flag as part of their event. Stops | |
1347 | explicitly for system call entry and exit always use | |
1348 | SIGTRAP, so only treat SIGTRAP events as system call | |
1349 | entry/exit events. */ | |
1350 | if (pl.pl_flags & (PL_FLAG_SCE | PL_FLAG_SCX) | |
1351 | && ourstatus->value.sig == SIGTRAP) | |
1352 | { | |
1353 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1354 | if (catch_syscall_enabled ()) | |
1355 | { | |
1356 | if (catching_syscall_number (pl.pl_syscall_code)) | |
1357 | { | |
1358 | if (pl.pl_flags & PL_FLAG_SCE) | |
1359 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
1360 | else | |
1361 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
1362 | ourstatus->value.syscall_number = pl.pl_syscall_code; | |
1363 | return wptid; | |
1364 | } | |
1365 | } | |
1366 | #endif | |
1367 | /* If the core isn't interested in this event, just | |
1368 | continue the process explicitly and wait for another | |
1369 | event. Note that PT_SYSCALL is "sticky" on FreeBSD | |
1370 | and once system call stops are enabled on a process | |
1371 | it stops for all system call entries and exits. */ | |
1372 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1373 | perror_with_name (("ptrace")); | |
1374 | continue; | |
1375 | } | |
e58e05d6 JB |
1376 | } |
1377 | return wptid; | |
1378 | } | |
1379 | } | |
1380 | ||
7efba073 | 1381 | #ifdef USE_SIGTRAP_SIGINFO |
f6ac5f3d | 1382 | /* Implement the "stopped_by_sw_breakpoint" target_ops method. */ |
7efba073 | 1383 | |
57810aa7 | 1384 | bool |
f6ac5f3d | 1385 | fbsd_nat_target::stopped_by_sw_breakpoint () |
7efba073 JB |
1386 | { |
1387 | struct ptrace_lwpinfo pl; | |
1388 | ||
1389 | if (ptrace (PT_LWPINFO, get_ptrace_pid (inferior_ptid), (caddr_t) &pl, | |
1390 | sizeof pl) == -1) | |
57810aa7 | 1391 | return false; |
7efba073 | 1392 | |
6d78332e | 1393 | return (pl.pl_flags == PL_FLAG_SI |
7efba073 JB |
1394 | && pl.pl_siginfo.si_signo == SIGTRAP |
1395 | && pl.pl_siginfo.si_code == TRAP_BRKPT); | |
1396 | } | |
1397 | ||
f6ac5f3d | 1398 | /* Implement the "supports_stopped_by_sw_breakpoint" target_ops |
7efba073 JB |
1399 | method. */ |
1400 | ||
57810aa7 | 1401 | bool |
f6ac5f3d | 1402 | fbsd_nat_target::supports_stopped_by_sw_breakpoint () |
7efba073 | 1403 | { |
57810aa7 | 1404 | return true; |
7efba073 | 1405 | } |
7efba073 JB |
1406 | #endif |
1407 | ||
09db4332 JB |
1408 | #ifdef PROC_ASLR_CTL |
1409 | class maybe_disable_address_space_randomization | |
1410 | { | |
1411 | public: | |
1412 | explicit maybe_disable_address_space_randomization (bool disable_randomization) | |
1413 | { | |
1414 | if (disable_randomization) | |
1415 | { | |
1416 | if (procctl (P_PID, getpid (), PROC_ASLR_STATUS, &m_aslr_ctl) == -1) | |
1417 | { | |
1418 | warning (_("Failed to fetch current address space randomization " | |
1419 | "status: %s"), safe_strerror (errno)); | |
1420 | return; | |
1421 | } | |
1422 | ||
1423 | m_aslr_ctl &= ~PROC_ASLR_ACTIVE; | |
1424 | if (m_aslr_ctl == PROC_ASLR_FORCE_DISABLE) | |
1425 | return; | |
1426 | ||
1427 | int ctl = PROC_ASLR_FORCE_DISABLE; | |
1428 | if (procctl (P_PID, getpid (), PROC_ASLR_CTL, &ctl) == -1) | |
1429 | { | |
1430 | warning (_("Error disabling address space randomization: %s"), | |
1431 | safe_strerror (errno)); | |
1432 | return; | |
1433 | } | |
1434 | ||
1435 | m_aslr_ctl_set = true; | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | ~maybe_disable_address_space_randomization () | |
1440 | { | |
1441 | if (m_aslr_ctl_set) | |
1442 | { | |
1443 | if (procctl (P_PID, getpid (), PROC_ASLR_CTL, &m_aslr_ctl) == -1) | |
1444 | warning (_("Error restoring address space randomization: %s"), | |
1445 | safe_strerror (errno)); | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | DISABLE_COPY_AND_ASSIGN (maybe_disable_address_space_randomization); | |
1450 | ||
1451 | private: | |
1452 | bool m_aslr_ctl_set = false; | |
1453 | int m_aslr_ctl = 0; | |
1454 | }; | |
1455 | #endif | |
1456 | ||
1457 | void | |
1458 | fbsd_nat_target::create_inferior (const char *exec_file, | |
1459 | const std::string &allargs, | |
1460 | char **env, int from_tty) | |
1461 | { | |
1462 | #ifdef PROC_ASLR_CTL | |
1463 | maybe_disable_address_space_randomization restore_aslr_ctl | |
1464 | (disable_randomization); | |
1465 | #endif | |
1466 | ||
1467 | inf_ptrace_target::create_inferior (exec_file, allargs, env, from_tty); | |
1468 | } | |
1469 | ||
e58e05d6 JB |
1470 | #ifdef TDP_RFPPWAIT |
1471 | /* Target hook for follow_fork. On entry and at return inferior_ptid is | |
1472 | the ptid of the followed inferior. */ | |
1473 | ||
e97007b6 | 1474 | void |
5ab2fbf1 | 1475 | fbsd_nat_target::follow_fork (bool follow_child, bool detach_fork) |
e58e05d6 | 1476 | { |
bb2a62e6 | 1477 | if (!follow_child && detach_fork) |
e58e05d6 JB |
1478 | { |
1479 | struct thread_info *tp = inferior_thread (); | |
e99b03dc | 1480 | pid_t child_pid = tp->pending_follow.value.related_pid.pid (); |
e58e05d6 JB |
1481 | |
1482 | /* Breakpoints have already been detached from the child by | |
1483 | infrun.c. */ | |
1484 | ||
1485 | if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1) | |
1486 | perror_with_name (("ptrace")); | |
2c5c2a33 | 1487 | |
dbaed385 JB |
1488 | #ifndef PTRACE_VFORK |
1489 | if (tp->pending_follow.kind == TARGET_WAITKIND_VFORKED) | |
2c5c2a33 JB |
1490 | { |
1491 | /* We can't insert breakpoints until the child process has | |
1492 | finished with the shared memory region. The parent | |
1493 | process doesn't wait for the child process to exit or | |
1494 | exec until after it has been resumed from the ptrace stop | |
1495 | to report the fork. Once it has been resumed it doesn't | |
1496 | stop again before returning to userland, so there is no | |
1497 | reliable way to wait on the parent. | |
1498 | ||
1499 | We can't stay attached to the child to wait for an exec | |
1500 | or exit because it may invoke ptrace(PT_TRACE_ME) | |
1501 | (e.g. if the parent process is a debugger forking a new | |
1502 | child process). | |
1503 | ||
1504 | In the end, the best we can do is to make sure it runs | |
1505 | for a little while. Hopefully it will be out of range of | |
1506 | any breakpoints we reinsert. Usually this is only the | |
1507 | single-step breakpoint at vfork's return point. */ | |
1508 | ||
1509 | usleep (10000); | |
1510 | ||
1511 | /* Schedule a fake VFORK_DONE event to report on the next | |
1512 | wait. */ | |
1513 | fbsd_add_vfork_done (inferior_ptid); | |
1514 | } | |
dbaed385 | 1515 | #endif |
e58e05d6 | 1516 | } |
e58e05d6 JB |
1517 | } |
1518 | ||
f6ac5f3d PA |
1519 | int |
1520 | fbsd_nat_target::insert_fork_catchpoint (int pid) | |
e58e05d6 JB |
1521 | { |
1522 | return 0; | |
1523 | } | |
1524 | ||
f6ac5f3d PA |
1525 | int |
1526 | fbsd_nat_target::remove_fork_catchpoint (int pid) | |
e58e05d6 JB |
1527 | { |
1528 | return 0; | |
1529 | } | |
1530 | ||
f6ac5f3d PA |
1531 | int |
1532 | fbsd_nat_target::insert_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1533 | { |
1534 | return 0; | |
1535 | } | |
1536 | ||
f6ac5f3d PA |
1537 | int |
1538 | fbsd_nat_target::remove_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1539 | { |
1540 | return 0; | |
1541 | } | |
6e9567fe | 1542 | #endif |
e58e05d6 | 1543 | |
f6ac5f3d | 1544 | /* Implement the "post_startup_inferior" target_ops method. */ |
e58e05d6 | 1545 | |
f6ac5f3d PA |
1546 | void |
1547 | fbsd_nat_target::post_startup_inferior (ptid_t pid) | |
e58e05d6 | 1548 | { |
e99b03dc | 1549 | fbsd_enable_proc_events (pid.pid ()); |
e58e05d6 JB |
1550 | } |
1551 | ||
f6ac5f3d | 1552 | /* Implement the "post_attach" target_ops method. */ |
e58e05d6 | 1553 | |
f6ac5f3d PA |
1554 | void |
1555 | fbsd_nat_target::post_attach (int pid) | |
e58e05d6 | 1556 | { |
da95a26c | 1557 | fbsd_enable_proc_events (pid); |
5b6d1e4f | 1558 | fbsd_add_threads (this, pid); |
6e9567fe | 1559 | } |
d2b41ca0 | 1560 | |
fe5ddfc3 | 1561 | /* Traced processes always stop after exec. */ |
d2b41ca0 | 1562 | |
f6ac5f3d PA |
1563 | int |
1564 | fbsd_nat_target::insert_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1565 | { |
1566 | return 0; | |
1567 | } | |
1568 | ||
f6ac5f3d PA |
1569 | int |
1570 | fbsd_nat_target::remove_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1571 | { |
1572 | return 0; | |
1573 | } | |
e6cdd38e JB |
1574 | |
1575 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
f6ac5f3d PA |
1576 | int |
1577 | fbsd_nat_target::set_syscall_catchpoint (int pid, bool needed, | |
1578 | int any_count, | |
1579 | gdb::array_view<const int> syscall_counts) | |
e6cdd38e JB |
1580 | { |
1581 | ||
1582 | /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which | |
1583 | will catch all system call entries and exits. The system calls | |
1584 | are filtered by GDB rather than the kernel. */ | |
1585 | return 0; | |
1586 | } | |
1587 | #endif | |
e58e05d6 | 1588 | |
54904d81 JB |
1589 | bool |
1590 | fbsd_nat_target::supports_multi_process () | |
1591 | { | |
1592 | return true; | |
1593 | } | |
1594 | ||
09db4332 JB |
1595 | bool |
1596 | fbsd_nat_target::supports_disable_randomization () | |
1597 | { | |
1598 | #ifdef PROC_ASLR_CTL | |
1599 | return true; | |
1600 | #else | |
1601 | return false; | |
1602 | #endif | |
1603 | } | |
1604 | ||
6c265988 | 1605 | void _initialize_fbsd_nat (); |
6e9567fe | 1606 | void |
6c265988 | 1607 | _initialize_fbsd_nat () |
6e9567fe | 1608 | { |
6e9567fe JB |
1609 | add_setshow_boolean_cmd ("fbsd-lwp", class_maintenance, |
1610 | &debug_fbsd_lwp, _("\ | |
1611 | Set debugging of FreeBSD lwp module."), _("\ | |
1612 | Show debugging of FreeBSD lwp module."), _("\ | |
1613 | Enables printf debugging output."), | |
1614 | NULL, | |
1615 | &show_fbsd_lwp_debug, | |
1616 | &setdebuglist, &showdebuglist); | |
386a8676 JB |
1617 | add_setshow_boolean_cmd ("fbsd-nat", class_maintenance, |
1618 | &debug_fbsd_nat, _("\ | |
1619 | Set debugging of FreeBSD native target."), _("\ | |
1620 | Show debugging of FreeBSD native target."), _("\ | |
1621 | Enables printf debugging output."), | |
1622 | NULL, | |
1623 | &show_fbsd_nat_debug, | |
1624 | &setdebuglist, &showdebuglist); | |
6e9567fe | 1625 | } |