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Commit | Line | Data |
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578c1c03 MK |
1 | /* Native-dependent code for FreeBSD. |
2 | ||
4a94e368 | 3 | Copyright (C) 2002-2022 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" | |
9385df2a | 21 | #include "gdbsupport/block-signals.h" |
268a13a5 | 22 | #include "gdbsupport/byte-vector.h" |
9385df2a | 23 | #include "gdbsupport/event-loop.h" |
4de283e4 TT |
24 | #include "gdbcore.h" |
25 | #include "inferior.h" | |
26 | #include "regcache.h" | |
27 | #include "regset.h" | |
cbde90f2 | 28 | #include "gdbarch.h" |
4de283e4 TT |
29 | #include "gdbcmd.h" |
30 | #include "gdbthread.h" | |
2ddd4c60 | 31 | #include "gdbsupport/buildargv.h" |
268a13a5 | 32 | #include "gdbsupport/gdb_wait.h" |
9385df2a | 33 | #include "inf-loop.h" |
4de283e4 TT |
34 | #include "inf-ptrace.h" |
35 | #include <sys/types.h> | |
09db4332 JB |
36 | #ifdef HAVE_SYS_PROCCTL_H |
37 | #include <sys/procctl.h> | |
38 | #endif | |
68b9939a | 39 | #include <sys/procfs.h> |
e58e05d6 | 40 | #include <sys/ptrace.h> |
929edea9 | 41 | #include <sys/signal.h> |
68b9939a | 42 | #include <sys/sysctl.h> |
25268153 | 43 | #include <sys/user.h> |
4de283e4 | 44 | #include <libutil.h> |
4de283e4 | 45 | |
578c1c03 MK |
46 | #include "elf-bfd.h" |
47 | #include "fbsd-nat.h" | |
92fce24d | 48 | #include "fbsd-tdep.h" |
4de283e4 TT |
49 | |
50 | #include <list> | |
e8c6b620 | 51 | |
40c23d88 JB |
52 | #ifndef PT_GETREGSET |
53 | #define PT_GETREGSET 42 /* Get a target register set */ | |
54 | #define PT_SETREGSET 43 /* Set a target register set */ | |
55 | #endif | |
56 | ||
766062f6 | 57 | /* Return the name of a file that can be opened to get the symbols for |
578c1c03 MK |
58 | the child process identified by PID. */ |
59 | ||
0e90c441 | 60 | const char * |
f6ac5f3d | 61 | fbsd_nat_target::pid_to_exec_file (int pid) |
578c1c03 | 62 | { |
b4ab256d | 63 | static char buf[PATH_MAX]; |
f2feec98 | 64 | size_t buflen; |
68b9939a | 65 | int mib[4]; |
578c1c03 | 66 | |
68b9939a MK |
67 | mib[0] = CTL_KERN; |
68 | mib[1] = KERN_PROC; | |
69 | mib[2] = KERN_PROC_PATHNAME; | |
70 | mib[3] = pid; | |
f2feec98 JB |
71 | buflen = sizeof buf; |
72 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
b999e203 JB |
73 | /* The kern.proc.pathname.<pid> sysctl returns a length of zero |
74 | for processes without an associated executable such as kernel | |
75 | processes. */ | |
76 | return buflen == 0 ? NULL : buf; | |
68b9939a | 77 | |
b4ab256d | 78 | return NULL; |
578c1c03 MK |
79 | } |
80 | ||
25268153 | 81 | /* Iterate over all the memory regions in the current inferior, |
d1076c41 | 82 | calling FUNC for each memory region. DATA is passed as the last |
25268153 JB |
83 | argument to FUNC. */ |
84 | ||
f6ac5f3d PA |
85 | int |
86 | fbsd_nat_target::find_memory_regions (find_memory_region_ftype func, | |
d1076c41 | 87 | void *data) |
25268153 | 88 | { |
e99b03dc | 89 | pid_t pid = inferior_ptid.pid (); |
e4a26669 | 90 | struct kinfo_vmentry *kve; |
25268153 | 91 | uint64_t size; |
25268153 JB |
92 | int i, nitems; |
93 | ||
262f62f5 | 94 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> |
e4a26669 | 95 | vmentl (kinfo_getvmmap (pid, &nitems)); |
25268153 | 96 | if (vmentl == NULL) |
deb70aa0 | 97 | perror_with_name (_("Couldn't fetch VM map entries")); |
25268153 | 98 | |
e4a26669 | 99 | for (i = 0, kve = vmentl.get (); i < nitems; i++, kve++) |
25268153 | 100 | { |
25268153 JB |
101 | /* Skip unreadable segments and those where MAP_NOCORE has been set. */ |
102 | if (!(kve->kve_protection & KVME_PROT_READ) | |
103 | || kve->kve_flags & KVME_FLAG_NOCOREDUMP) | |
104 | continue; | |
105 | ||
106 | /* Skip segments with an invalid type. */ | |
107 | if (kve->kve_type != KVME_TYPE_DEFAULT | |
108 | && kve->kve_type != KVME_TYPE_VNODE | |
109 | && kve->kve_type != KVME_TYPE_SWAP | |
110 | && kve->kve_type != KVME_TYPE_PHYS) | |
111 | continue; | |
112 | ||
113 | size = kve->kve_end - kve->kve_start; | |
114 | if (info_verbose) | |
115 | { | |
6cb06a8c TT |
116 | gdb_printf ("Save segment, %ld bytes at %s (%c%c%c)\n", |
117 | (long) size, | |
118 | paddress (target_gdbarch (), kve->kve_start), | |
119 | kve->kve_protection & KVME_PROT_READ ? 'r' : '-', | |
120 | kve->kve_protection & KVME_PROT_WRITE ? 'w' : '-', | |
121 | kve->kve_protection & KVME_PROT_EXEC ? 'x' : '-'); | |
25268153 JB |
122 | } |
123 | ||
124 | /* Invoke the callback function to create the corefile segment. | |
125 | Pass MODIFIED as true, we do not know the real modification state. */ | |
126 | func (kve->kve_start, size, kve->kve_protection & KVME_PROT_READ, | |
127 | kve->kve_protection & KVME_PROT_WRITE, | |
e01493b7 | 128 | kve->kve_protection & KVME_PROT_EXEC, 1, false, data); |
25268153 | 129 | } |
25268153 JB |
130 | return 0; |
131 | } | |
8f60fe01 | 132 | |
92fce24d JB |
133 | /* Fetch the command line for a running process. */ |
134 | ||
135 | static gdb::unique_xmalloc_ptr<char> | |
136 | fbsd_fetch_cmdline (pid_t pid) | |
137 | { | |
138 | size_t len; | |
139 | int mib[4]; | |
140 | ||
141 | len = 0; | |
142 | mib[0] = CTL_KERN; | |
143 | mib[1] = KERN_PROC; | |
144 | mib[2] = KERN_PROC_ARGS; | |
145 | mib[3] = pid; | |
146 | if (sysctl (mib, 4, NULL, &len, NULL, 0) == -1) | |
147 | return nullptr; | |
148 | ||
149 | if (len == 0) | |
150 | return nullptr; | |
151 | ||
152 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) xmalloc (len)); | |
153 | if (sysctl (mib, 4, cmdline.get (), &len, NULL, 0) == -1) | |
154 | return nullptr; | |
155 | ||
424eb552 JB |
156 | /* Join the arguments with spaces to form a single string. */ |
157 | char *cp = cmdline.get (); | |
158 | for (size_t i = 0; i < len - 1; i++) | |
159 | if (cp[i] == '\0') | |
160 | cp[i] = ' '; | |
161 | cp[len - 1] = '\0'; | |
162 | ||
92fce24d JB |
163 | return cmdline; |
164 | } | |
165 | ||
166 | /* Fetch the external variant of the kernel's internal process | |
167 | structure for the process PID into KP. */ | |
168 | ||
169 | static bool | |
170 | fbsd_fetch_kinfo_proc (pid_t pid, struct kinfo_proc *kp) | |
171 | { | |
172 | size_t len; | |
173 | int mib[4]; | |
174 | ||
175 | len = sizeof *kp; | |
176 | mib[0] = CTL_KERN; | |
177 | mib[1] = KERN_PROC; | |
178 | mib[2] = KERN_PROC_PID; | |
179 | mib[3] = pid; | |
180 | return (sysctl (mib, 4, kp, &len, NULL, 0) == 0); | |
181 | } | |
182 | ||
f6ac5f3d | 183 | /* Implement the "info_proc" target_ops method. */ |
92fce24d | 184 | |
f6ac5f3d PA |
185 | bool |
186 | fbsd_nat_target::info_proc (const char *args, enum info_proc_what what) | |
92fce24d | 187 | { |
92fce24d JB |
188 | gdb::unique_xmalloc_ptr<struct kinfo_file> fdtbl; |
189 | int nfd = 0; | |
92fce24d | 190 | struct kinfo_proc kp; |
92fce24d JB |
191 | pid_t pid; |
192 | bool do_cmdline = false; | |
193 | bool do_cwd = false; | |
194 | bool do_exe = false; | |
7e69672e | 195 | bool do_files = false; |
92fce24d | 196 | bool do_mappings = false; |
92fce24d JB |
197 | bool do_status = false; |
198 | ||
199 | switch (what) | |
200 | { | |
201 | case IP_MINIMAL: | |
202 | do_cmdline = true; | |
203 | do_cwd = true; | |
204 | do_exe = true; | |
205 | break; | |
92fce24d JB |
206 | case IP_MAPPINGS: |
207 | do_mappings = true; | |
208 | break; | |
92fce24d JB |
209 | case IP_STATUS: |
210 | case IP_STAT: | |
211 | do_status = true; | |
212 | break; | |
213 | case IP_CMDLINE: | |
214 | do_cmdline = true; | |
215 | break; | |
216 | case IP_EXE: | |
217 | do_exe = true; | |
218 | break; | |
219 | case IP_CWD: | |
220 | do_cwd = true; | |
221 | break; | |
7e69672e JB |
222 | case IP_FILES: |
223 | do_files = true; | |
224 | break; | |
92fce24d JB |
225 | case IP_ALL: |
226 | do_cmdline = true; | |
227 | do_cwd = true; | |
228 | do_exe = true; | |
7e69672e | 229 | do_files = true; |
92fce24d | 230 | do_mappings = true; |
92fce24d JB |
231 | do_status = true; |
232 | break; | |
233 | default: | |
234 | error (_("Not supported on this target.")); | |
235 | } | |
236 | ||
237 | gdb_argv built_argv (args); | |
238 | if (built_argv.count () == 0) | |
239 | { | |
e99b03dc | 240 | pid = inferior_ptid.pid (); |
92fce24d JB |
241 | if (pid == 0) |
242 | error (_("No current process: you must name one.")); | |
243 | } | |
244 | else if (built_argv.count () == 1 && isdigit (built_argv[0][0])) | |
245 | pid = strtol (built_argv[0], NULL, 10); | |
246 | else | |
247 | error (_("Invalid arguments.")); | |
248 | ||
6cb06a8c | 249 | gdb_printf (_("process %d\n"), pid); |
7e69672e | 250 | if (do_cwd || do_exe || do_files) |
92fce24d | 251 | fdtbl.reset (kinfo_getfile (pid, &nfd)); |
92fce24d JB |
252 | |
253 | if (do_cmdline) | |
254 | { | |
255 | gdb::unique_xmalloc_ptr<char> cmdline = fbsd_fetch_cmdline (pid); | |
256 | if (cmdline != nullptr) | |
6cb06a8c | 257 | gdb_printf ("cmdline = '%s'\n", cmdline.get ()); |
92fce24d JB |
258 | else |
259 | warning (_("unable to fetch command line")); | |
260 | } | |
261 | if (do_cwd) | |
262 | { | |
263 | const char *cwd = NULL; | |
92fce24d JB |
264 | struct kinfo_file *kf = fdtbl.get (); |
265 | for (int i = 0; i < nfd; i++, kf++) | |
266 | { | |
267 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_CWD) | |
268 | { | |
269 | cwd = kf->kf_path; | |
270 | break; | |
271 | } | |
272 | } | |
92fce24d | 273 | if (cwd != NULL) |
6cb06a8c | 274 | gdb_printf ("cwd = '%s'\n", cwd); |
92fce24d JB |
275 | else |
276 | warning (_("unable to fetch current working directory")); | |
277 | } | |
278 | if (do_exe) | |
279 | { | |
280 | const char *exe = NULL; | |
92fce24d JB |
281 | struct kinfo_file *kf = fdtbl.get (); |
282 | for (int i = 0; i < nfd; i++, kf++) | |
283 | { | |
284 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_TEXT) | |
285 | { | |
286 | exe = kf->kf_path; | |
287 | break; | |
288 | } | |
289 | } | |
92fce24d | 290 | if (exe == NULL) |
f6ac5f3d | 291 | exe = pid_to_exec_file (pid); |
92fce24d | 292 | if (exe != NULL) |
6cb06a8c | 293 | gdb_printf ("exe = '%s'\n", exe); |
92fce24d JB |
294 | else |
295 | warning (_("unable to fetch executable path name")); | |
296 | } | |
7e69672e JB |
297 | if (do_files) |
298 | { | |
299 | struct kinfo_file *kf = fdtbl.get (); | |
300 | ||
301 | if (nfd > 0) | |
302 | { | |
303 | fbsd_info_proc_files_header (); | |
304 | for (int i = 0; i < nfd; i++, kf++) | |
305 | fbsd_info_proc_files_entry (kf->kf_type, kf->kf_fd, kf->kf_flags, | |
306 | kf->kf_offset, kf->kf_vnode_type, | |
307 | kf->kf_sock_domain, kf->kf_sock_type, | |
308 | kf->kf_sock_protocol, &kf->kf_sa_local, | |
309 | &kf->kf_sa_peer, kf->kf_path); | |
310 | } | |
311 | else | |
312 | warning (_("unable to fetch list of open files")); | |
313 | } | |
92fce24d JB |
314 | if (do_mappings) |
315 | { | |
316 | int nvment; | |
317 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> | |
318 | vmentl (kinfo_getvmmap (pid, &nvment)); | |
319 | ||
320 | if (vmentl != nullptr) | |
321 | { | |
6f3b1098 JB |
322 | int addr_bit = TARGET_CHAR_BIT * sizeof (void *); |
323 | fbsd_info_proc_mappings_header (addr_bit); | |
92fce24d JB |
324 | |
325 | struct kinfo_vmentry *kve = vmentl.get (); | |
326 | for (int i = 0; i < nvment; i++, kve++) | |
6f3b1098 JB |
327 | fbsd_info_proc_mappings_entry (addr_bit, kve->kve_start, |
328 | kve->kve_end, kve->kve_offset, | |
329 | kve->kve_flags, kve->kve_protection, | |
330 | kve->kve_path); | |
92fce24d JB |
331 | } |
332 | else | |
333 | warning (_("unable to fetch virtual memory map")); | |
334 | } | |
92fce24d JB |
335 | if (do_status) |
336 | { | |
337 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) | |
338 | warning (_("Failed to fetch process information")); | |
339 | else | |
340 | { | |
341 | const char *state; | |
342 | int pgtok; | |
343 | ||
6cb06a8c | 344 | gdb_printf ("Name: %s\n", kp.ki_comm); |
92fce24d JB |
345 | switch (kp.ki_stat) |
346 | { | |
347 | case SIDL: | |
348 | state = "I (idle)"; | |
349 | break; | |
350 | case SRUN: | |
351 | state = "R (running)"; | |
352 | break; | |
353 | case SSTOP: | |
354 | state = "T (stopped)"; | |
355 | break; | |
356 | case SZOMB: | |
357 | state = "Z (zombie)"; | |
358 | break; | |
359 | case SSLEEP: | |
360 | state = "S (sleeping)"; | |
361 | break; | |
362 | case SWAIT: | |
363 | state = "W (interrupt wait)"; | |
364 | break; | |
365 | case SLOCK: | |
366 | state = "L (blocked on lock)"; | |
367 | break; | |
368 | default: | |
369 | state = "? (unknown)"; | |
370 | break; | |
371 | } | |
6cb06a8c TT |
372 | gdb_printf ("State: %s\n", state); |
373 | gdb_printf ("Parent process: %d\n", kp.ki_ppid); | |
374 | gdb_printf ("Process group: %d\n", kp.ki_pgid); | |
375 | gdb_printf ("Session id: %d\n", kp.ki_sid); | |
376 | gdb_printf ("TTY: %s\n", pulongest (kp.ki_tdev)); | |
377 | gdb_printf ("TTY owner process group: %d\n", kp.ki_tpgid); | |
378 | gdb_printf ("User IDs (real, effective, saved): %d %d %d\n", | |
379 | kp.ki_ruid, kp.ki_uid, kp.ki_svuid); | |
380 | gdb_printf ("Group IDs (real, effective, saved): %d %d %d\n", | |
381 | kp.ki_rgid, kp.ki_groups[0], kp.ki_svgid); | |
382 | gdb_printf ("Groups: "); | |
92fce24d | 383 | for (int i = 0; i < kp.ki_ngroups; i++) |
6cb06a8c TT |
384 | gdb_printf ("%d ", kp.ki_groups[i]); |
385 | gdb_printf ("\n"); | |
386 | gdb_printf ("Minor faults (no memory page): %ld\n", | |
387 | kp.ki_rusage.ru_minflt); | |
388 | gdb_printf ("Minor faults, children: %ld\n", | |
389 | kp.ki_rusage_ch.ru_minflt); | |
390 | gdb_printf ("Major faults (memory page faults): %ld\n", | |
391 | kp.ki_rusage.ru_majflt); | |
392 | gdb_printf ("Major faults, children: %ld\n", | |
393 | kp.ki_rusage_ch.ru_majflt); | |
394 | gdb_printf ("utime: %s.%06ld\n", | |
395 | plongest (kp.ki_rusage.ru_utime.tv_sec), | |
396 | kp.ki_rusage.ru_utime.tv_usec); | |
397 | gdb_printf ("stime: %s.%06ld\n", | |
398 | plongest (kp.ki_rusage.ru_stime.tv_sec), | |
399 | kp.ki_rusage.ru_stime.tv_usec); | |
400 | gdb_printf ("utime, children: %s.%06ld\n", | |
401 | plongest (kp.ki_rusage_ch.ru_utime.tv_sec), | |
402 | kp.ki_rusage_ch.ru_utime.tv_usec); | |
403 | gdb_printf ("stime, children: %s.%06ld\n", | |
404 | plongest (kp.ki_rusage_ch.ru_stime.tv_sec), | |
405 | kp.ki_rusage_ch.ru_stime.tv_usec); | |
406 | gdb_printf ("'nice' value: %d\n", kp.ki_nice); | |
407 | gdb_printf ("Start time: %s.%06ld\n", | |
408 | plongest (kp.ki_start.tv_sec), | |
409 | kp.ki_start.tv_usec); | |
92fce24d | 410 | pgtok = getpagesize () / 1024; |
6cb06a8c TT |
411 | gdb_printf ("Virtual memory size: %s kB\n", |
412 | pulongest (kp.ki_size / 1024)); | |
413 | gdb_printf ("Data size: %s kB\n", | |
414 | pulongest (kp.ki_dsize * pgtok)); | |
415 | gdb_printf ("Stack size: %s kB\n", | |
416 | pulongest (kp.ki_ssize * pgtok)); | |
417 | gdb_printf ("Text size: %s kB\n", | |
418 | pulongest (kp.ki_tsize * pgtok)); | |
419 | gdb_printf ("Resident set size: %s kB\n", | |
420 | pulongest (kp.ki_rssize * pgtok)); | |
421 | gdb_printf ("Maximum RSS: %s kB\n", | |
422 | pulongest (kp.ki_rusage.ru_maxrss)); | |
423 | gdb_printf ("Pending Signals: "); | |
92fce24d | 424 | for (int i = 0; i < _SIG_WORDS; i++) |
6cb06a8c TT |
425 | gdb_printf ("%08x ", kp.ki_siglist.__bits[i]); |
426 | gdb_printf ("\n"); | |
427 | gdb_printf ("Ignored Signals: "); | |
92fce24d | 428 | for (int i = 0; i < _SIG_WORDS; i++) |
6cb06a8c TT |
429 | gdb_printf ("%08x ", kp.ki_sigignore.__bits[i]); |
430 | gdb_printf ("\n"); | |
431 | gdb_printf ("Caught Signals: "); | |
92fce24d | 432 | for (int i = 0; i < _SIG_WORDS; i++) |
6cb06a8c TT |
433 | gdb_printf ("%08x ", kp.ki_sigcatch.__bits[i]); |
434 | gdb_printf ("\n"); | |
92fce24d JB |
435 | } |
436 | } | |
f6ac5f3d PA |
437 | |
438 | return true; | |
92fce24d JB |
439 | } |
440 | ||
929edea9 JB |
441 | /* Return the size of siginfo for the current inferior. */ |
442 | ||
443 | #ifdef __LP64__ | |
444 | union sigval32 { | |
445 | int sival_int; | |
446 | uint32_t sival_ptr; | |
447 | }; | |
448 | ||
449 | /* This structure matches the naming and layout of `siginfo_t' in | |
450 | <sys/signal.h>. In particular, the `si_foo' macros defined in that | |
451 | header can be used with both types to copy fields in the `_reason' | |
452 | union. */ | |
453 | ||
454 | struct siginfo32 | |
455 | { | |
456 | int si_signo; | |
457 | int si_errno; | |
458 | int si_code; | |
459 | __pid_t si_pid; | |
460 | __uid_t si_uid; | |
461 | int si_status; | |
462 | uint32_t si_addr; | |
463 | union sigval32 si_value; | |
464 | union | |
465 | { | |
466 | struct | |
467 | { | |
468 | int _trapno; | |
469 | } _fault; | |
470 | struct | |
471 | { | |
472 | int _timerid; | |
473 | int _overrun; | |
474 | } _timer; | |
475 | struct | |
476 | { | |
477 | int _mqd; | |
478 | } _mesgq; | |
479 | struct | |
480 | { | |
481 | int32_t _band; | |
482 | } _poll; | |
483 | struct | |
484 | { | |
485 | int32_t __spare1__; | |
486 | int __spare2__[7]; | |
487 | } __spare__; | |
488 | } _reason; | |
489 | }; | |
490 | #endif | |
491 | ||
492 | static size_t | |
493 | fbsd_siginfo_size () | |
494 | { | |
495 | #ifdef __LP64__ | |
496 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
497 | ||
498 | /* Is the inferior 32-bit? If so, use the 32-bit siginfo size. */ | |
a181c0bf | 499 | if (gdbarch_long_bit (gdbarch) == 32) |
929edea9 JB |
500 | return sizeof (struct siginfo32); |
501 | #endif | |
502 | return sizeof (siginfo_t); | |
503 | } | |
504 | ||
505 | /* Convert a native 64-bit siginfo object to a 32-bit object. Note | |
506 | that FreeBSD doesn't support writing to $_siginfo, so this only | |
507 | needs to convert one way. */ | |
508 | ||
509 | static void | |
510 | fbsd_convert_siginfo (siginfo_t *si) | |
511 | { | |
512 | #ifdef __LP64__ | |
513 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
514 | ||
515 | /* Is the inferior 32-bit? If not, nothing to do. */ | |
a181c0bf | 516 | if (gdbarch_long_bit (gdbarch) != 32) |
929edea9 JB |
517 | return; |
518 | ||
519 | struct siginfo32 si32; | |
520 | ||
521 | si32.si_signo = si->si_signo; | |
522 | si32.si_errno = si->si_errno; | |
523 | si32.si_code = si->si_code; | |
524 | si32.si_pid = si->si_pid; | |
525 | si32.si_uid = si->si_uid; | |
526 | si32.si_status = si->si_status; | |
527 | si32.si_addr = (uintptr_t) si->si_addr; | |
528 | ||
529 | /* If sival_ptr is being used instead of sival_int on a big-endian | |
530 | platform, then sival_int will be zero since it holds the upper | |
531 | 32-bits of the pointer value. */ | |
532 | #if _BYTE_ORDER == _BIG_ENDIAN | |
533 | if (si->si_value.sival_int == 0) | |
0335ac6d | 534 | si32.si_value.sival_ptr = (uintptr_t) si->si_value.sival_ptr; |
929edea9 JB |
535 | else |
536 | si32.si_value.sival_int = si->si_value.sival_int; | |
537 | #else | |
538 | si32.si_value.sival_int = si->si_value.sival_int; | |
539 | #endif | |
540 | ||
541 | /* Always copy the spare fields and then possibly overwrite them for | |
542 | signal-specific or code-specific fields. */ | |
543 | si32._reason.__spare__.__spare1__ = si->_reason.__spare__.__spare1__; | |
544 | for (int i = 0; i < 7; i++) | |
545 | si32._reason.__spare__.__spare2__[i] = si->_reason.__spare__.__spare2__[i]; | |
546 | switch (si->si_signo) { | |
547 | case SIGILL: | |
548 | case SIGFPE: | |
549 | case SIGSEGV: | |
550 | case SIGBUS: | |
551 | si32.si_trapno = si->si_trapno; | |
552 | break; | |
553 | } | |
554 | switch (si->si_code) { | |
555 | case SI_TIMER: | |
556 | si32.si_timerid = si->si_timerid; | |
557 | si32.si_overrun = si->si_overrun; | |
558 | break; | |
559 | case SI_MESGQ: | |
560 | si32.si_mqd = si->si_mqd; | |
561 | break; | |
562 | } | |
563 | ||
564 | memcpy(si, &si32, sizeof (si32)); | |
565 | #endif | |
566 | } | |
929edea9 | 567 | |
f6ac5f3d | 568 | /* Implement the "xfer_partial" target_ops method. */ |
7697fc9e | 569 | |
f6ac5f3d PA |
570 | enum target_xfer_status |
571 | fbsd_nat_target::xfer_partial (enum target_object object, | |
572 | const char *annex, gdb_byte *readbuf, | |
573 | const gdb_byte *writebuf, | |
574 | ULONGEST offset, ULONGEST len, | |
575 | ULONGEST *xfered_len) | |
7697fc9e | 576 | { |
e99b03dc | 577 | pid_t pid = inferior_ptid.pid (); |
7697fc9e JB |
578 | |
579 | switch (object) | |
580 | { | |
929edea9 JB |
581 | case TARGET_OBJECT_SIGNAL_INFO: |
582 | { | |
583 | struct ptrace_lwpinfo pl; | |
584 | size_t siginfo_size; | |
585 | ||
586 | /* FreeBSD doesn't support writing to $_siginfo. */ | |
587 | if (writebuf != NULL) | |
588 | return TARGET_XFER_E_IO; | |
589 | ||
590 | if (inferior_ptid.lwp_p ()) | |
591 | pid = inferior_ptid.lwp (); | |
592 | ||
593 | siginfo_size = fbsd_siginfo_size (); | |
594 | if (offset > siginfo_size) | |
595 | return TARGET_XFER_E_IO; | |
596 | ||
597 | if (ptrace (PT_LWPINFO, pid, (PTRACE_TYPE_ARG3) &pl, sizeof (pl)) == -1) | |
598 | return TARGET_XFER_E_IO; | |
599 | ||
600 | if (!(pl.pl_flags & PL_FLAG_SI)) | |
601 | return TARGET_XFER_E_IO; | |
602 | ||
603 | fbsd_convert_siginfo (&pl.pl_siginfo); | |
604 | if (offset + len > siginfo_size) | |
605 | len = siginfo_size - offset; | |
606 | ||
607 | memcpy (readbuf, ((gdb_byte *) &pl.pl_siginfo) + offset, len); | |
608 | *xfered_len = len; | |
609 | return TARGET_XFER_OK; | |
610 | } | |
f8eb6a9e | 611 | #ifdef KERN_PROC_AUXV |
7697fc9e JB |
612 | case TARGET_OBJECT_AUXV: |
613 | { | |
e4a26669 JB |
614 | gdb::byte_vector buf_storage; |
615 | gdb_byte *buf; | |
7697fc9e JB |
616 | size_t buflen; |
617 | int mib[4]; | |
618 | ||
619 | if (writebuf != NULL) | |
620 | return TARGET_XFER_E_IO; | |
621 | mib[0] = CTL_KERN; | |
622 | mib[1] = KERN_PROC; | |
623 | mib[2] = KERN_PROC_AUXV; | |
624 | mib[3] = pid; | |
625 | if (offset == 0) | |
626 | { | |
627 | buf = readbuf; | |
628 | buflen = len; | |
629 | } | |
630 | else | |
631 | { | |
632 | buflen = offset + len; | |
e4a26669 JB |
633 | buf_storage.resize (buflen); |
634 | buf = buf_storage.data (); | |
7697fc9e JB |
635 | } |
636 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
637 | { | |
638 | if (offset != 0) | |
639 | { | |
640 | if (buflen > offset) | |
641 | { | |
642 | buflen -= offset; | |
643 | memcpy (readbuf, buf + offset, buflen); | |
644 | } | |
645 | else | |
646 | buflen = 0; | |
647 | } | |
7697fc9e JB |
648 | *xfered_len = buflen; |
649 | return (buflen == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
650 | } | |
7697fc9e JB |
651 | return TARGET_XFER_E_IO; |
652 | } | |
f8eb6a9e JB |
653 | #endif |
654 | #if defined(KERN_PROC_VMMAP) && defined(KERN_PROC_PS_STRINGS) | |
739ab2e9 SS |
655 | case TARGET_OBJECT_FREEBSD_VMMAP: |
656 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
657 | { | |
658 | gdb::byte_vector buf_storage; | |
659 | gdb_byte *buf; | |
660 | size_t buflen; | |
661 | int mib[4]; | |
662 | ||
663 | int proc_target; | |
664 | uint32_t struct_size; | |
665 | switch (object) | |
666 | { | |
667 | case TARGET_OBJECT_FREEBSD_VMMAP: | |
668 | proc_target = KERN_PROC_VMMAP; | |
669 | struct_size = sizeof (struct kinfo_vmentry); | |
670 | break; | |
671 | case TARGET_OBJECT_FREEBSD_PS_STRINGS: | |
672 | proc_target = KERN_PROC_PS_STRINGS; | |
673 | struct_size = sizeof (void *); | |
674 | break; | |
675 | } | |
676 | ||
677 | if (writebuf != NULL) | |
678 | return TARGET_XFER_E_IO; | |
679 | ||
680 | mib[0] = CTL_KERN; | |
681 | mib[1] = KERN_PROC; | |
682 | mib[2] = proc_target; | |
683 | mib[3] = pid; | |
684 | ||
685 | if (sysctl (mib, 4, NULL, &buflen, NULL, 0) != 0) | |
686 | return TARGET_XFER_E_IO; | |
687 | buflen += sizeof (struct_size); | |
688 | ||
689 | if (offset >= buflen) | |
690 | { | |
691 | *xfered_len = 0; | |
692 | return TARGET_XFER_EOF; | |
693 | } | |
694 | ||
695 | buf_storage.resize (buflen); | |
696 | buf = buf_storage.data (); | |
697 | ||
698 | memcpy (buf, &struct_size, sizeof (struct_size)); | |
699 | buflen -= sizeof (struct_size); | |
700 | if (sysctl (mib, 4, buf + sizeof (struct_size), &buflen, NULL, 0) != 0) | |
701 | return TARGET_XFER_E_IO; | |
702 | buflen += sizeof (struct_size); | |
703 | ||
704 | if (buflen - offset < len) | |
705 | len = buflen - offset; | |
706 | memcpy (readbuf, buf + offset, len); | |
707 | *xfered_len = len; | |
708 | return TARGET_XFER_OK; | |
709 | } | |
f8eb6a9e | 710 | #endif |
7697fc9e | 711 | default: |
f6ac5f3d PA |
712 | return inf_ptrace_target::xfer_partial (object, annex, |
713 | readbuf, writebuf, offset, | |
714 | len, xfered_len); | |
7697fc9e JB |
715 | } |
716 | } | |
7697fc9e | 717 | |
491144b5 CB |
718 | static bool debug_fbsd_lwp; |
719 | static bool debug_fbsd_nat; | |
6e9567fe | 720 | |
6e9567fe JB |
721 | static void |
722 | show_fbsd_lwp_debug (struct ui_file *file, int from_tty, | |
723 | struct cmd_list_element *c, const char *value) | |
724 | { | |
6cb06a8c | 725 | gdb_printf (file, _("Debugging of FreeBSD lwp module is %s.\n"), value); |
6e9567fe JB |
726 | } |
727 | ||
386a8676 JB |
728 | static void |
729 | show_fbsd_nat_debug (struct ui_file *file, int from_tty, | |
730 | struct cmd_list_element *c, const char *value) | |
731 | { | |
6cb06a8c TT |
732 | gdb_printf (file, _("Debugging of FreeBSD native target is %s.\n"), |
733 | value); | |
386a8676 JB |
734 | } |
735 | ||
c45ecc9d JB |
736 | #define fbsd_lwp_debug_printf(fmt, ...) \ |
737 | debug_prefixed_printf_cond (debug_fbsd_lwp, "fbsd-lwp", fmt, ##__VA_ARGS__) | |
738 | ||
739 | #define fbsd_nat_debug_printf(fmt, ...) \ | |
740 | debug_prefixed_printf_cond (debug_fbsd_nat, "fbsd-nat", fmt, ##__VA_ARGS__) | |
741 | ||
742 | ||
6e9567fe JB |
743 | /* |
744 | FreeBSD's first thread support was via a "reentrant" version of libc | |
745 | (libc_r) that first shipped in 2.2.7. This library multiplexed all | |
746 | of the threads in a process onto a single kernel thread. This | |
4c7bf4f9 | 747 | library was supported via the bsd-uthread target. |
6e9567fe JB |
748 | |
749 | FreeBSD 5.1 introduced two new threading libraries that made use of | |
750 | multiple kernel threads. The first (libkse) scheduled M user | |
751 | threads onto N (<= M) kernel threads (LWPs). The second (libthr) | |
752 | bound each user thread to a dedicated kernel thread. libkse shipped | |
753 | as the default threading library (libpthread). | |
754 | ||
755 | FreeBSD 5.3 added a libthread_db to abstract the interface across | |
756 | the various thread libraries (libc_r, libkse, and libthr). | |
757 | ||
758 | FreeBSD 7.0 switched the default threading library from from libkse | |
759 | to libpthread and removed libc_r. | |
760 | ||
761 | FreeBSD 8.0 removed libkse and the in-kernel support for it. The | |
762 | only threading library supported by 8.0 and later is libthr which | |
763 | ties each user thread directly to an LWP. To simplify the | |
764 | implementation, this target only supports LWP-backed threads using | |
765 | ptrace directly rather than libthread_db. | |
766 | ||
767 | FreeBSD 11.0 introduced LWP event reporting via PT_LWP_EVENTS. | |
768 | */ | |
769 | ||
770 | /* Return true if PTID is still active in the inferior. */ | |
771 | ||
57810aa7 | 772 | bool |
f6ac5f3d | 773 | fbsd_nat_target::thread_alive (ptid_t ptid) |
6e9567fe | 774 | { |
15a9e13e | 775 | if (ptid.lwp_p ()) |
6e9567fe JB |
776 | { |
777 | struct ptrace_lwpinfo pl; | |
778 | ||
e38504b3 | 779 | if (ptrace (PT_LWPINFO, ptid.lwp (), (caddr_t) &pl, sizeof pl) |
6e9567fe | 780 | == -1) |
57810aa7 | 781 | return false; |
6e9567fe JB |
782 | #ifdef PL_FLAG_EXITED |
783 | if (pl.pl_flags & PL_FLAG_EXITED) | |
57810aa7 | 784 | return false; |
6e9567fe JB |
785 | #endif |
786 | } | |
787 | ||
57810aa7 | 788 | return true; |
6e9567fe JB |
789 | } |
790 | ||
a068643d | 791 | /* Convert PTID to a string. */ |
6e9567fe | 792 | |
a068643d | 793 | std::string |
f6ac5f3d | 794 | fbsd_nat_target::pid_to_str (ptid_t ptid) |
6e9567fe JB |
795 | { |
796 | lwpid_t lwp; | |
797 | ||
e38504b3 | 798 | lwp = ptid.lwp (); |
6e9567fe JB |
799 | if (lwp != 0) |
800 | { | |
e99b03dc | 801 | int pid = ptid.pid (); |
6e9567fe | 802 | |
a068643d | 803 | return string_printf ("LWP %d of process %d", lwp, pid); |
6e9567fe JB |
804 | } |
805 | ||
806 | return normal_pid_to_str (ptid); | |
807 | } | |
808 | ||
809 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
810 | /* Return the name assigned to a thread by an application. Returns | |
811 | the string in a static buffer. */ | |
812 | ||
f6ac5f3d PA |
813 | const char * |
814 | fbsd_nat_target::thread_name (struct thread_info *thr) | |
6e9567fe JB |
815 | { |
816 | struct ptrace_lwpinfo pl; | |
817 | struct kinfo_proc kp; | |
e99b03dc | 818 | int pid = thr->ptid.pid (); |
e38504b3 | 819 | long lwp = thr->ptid.lwp (); |
6e9567fe JB |
820 | static char buf[sizeof pl.pl_tdname + 1]; |
821 | ||
822 | /* Note that ptrace_lwpinfo returns the process command in pl_tdname | |
823 | if a name has not been set explicitly. Return a NULL name in | |
824 | that case. */ | |
92fce24d | 825 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) |
d0bbe64c | 826 | return nullptr; |
6e9567fe | 827 | if (ptrace (PT_LWPINFO, lwp, (caddr_t) &pl, sizeof pl) == -1) |
d0bbe64c | 828 | return nullptr; |
6e9567fe JB |
829 | if (strcmp (kp.ki_comm, pl.pl_tdname) == 0) |
830 | return NULL; | |
831 | xsnprintf (buf, sizeof buf, "%s", pl.pl_tdname); | |
832 | return buf; | |
833 | } | |
834 | #endif | |
835 | ||
da95a26c | 836 | /* Enable additional event reporting on new processes. |
6e9567fe | 837 | |
da95a26c JB |
838 | To catch fork events, PTRACE_FORK is set on every traced process |
839 | to enable stops on returns from fork or vfork. Note that both the | |
840 | parent and child will always stop, even if system call stops are | |
841 | not enabled. | |
842 | ||
843 | To catch LWP events, PTRACE_EVENTS is set on every traced process. | |
6e9567fe JB |
844 | This enables stops on the birth for new LWPs (excluding the "main" LWP) |
845 | and the death of LWPs (excluding the last LWP in a process). Note | |
846 | that unlike fork events, the LWP that creates a new LWP does not | |
847 | report an event. */ | |
848 | ||
849 | static void | |
da95a26c | 850 | fbsd_enable_proc_events (pid_t pid) |
6e9567fe | 851 | { |
da95a26c JB |
852 | #ifdef PT_GET_EVENT_MASK |
853 | int events; | |
854 | ||
855 | if (ptrace (PT_GET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, | |
856 | sizeof (events)) == -1) | |
5efac66c | 857 | perror_with_name (("ptrace (PT_GET_EVENT_MASK)")); |
da95a26c | 858 | events |= PTRACE_FORK | PTRACE_LWP; |
dbaed385 JB |
859 | #ifdef PTRACE_VFORK |
860 | events |= PTRACE_VFORK; | |
861 | #endif | |
da95a26c JB |
862 | if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, |
863 | sizeof (events)) == -1) | |
5efac66c | 864 | perror_with_name (("ptrace (PT_SET_EVENT_MASK)")); |
da95a26c JB |
865 | #else |
866 | #ifdef TDP_RFPPWAIT | |
867 | if (ptrace (PT_FOLLOW_FORK, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) | |
5efac66c | 868 | perror_with_name (("ptrace (PT_FOLLOW_FORK)")); |
da95a26c JB |
869 | #endif |
870 | #ifdef PT_LWP_EVENTS | |
6e9567fe | 871 | if (ptrace (PT_LWP_EVENTS, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) |
5efac66c | 872 | perror_with_name (("ptrace (PT_LWP_EVENTS)")); |
6e9567fe | 873 | #endif |
da95a26c JB |
874 | #endif |
875 | } | |
6e9567fe JB |
876 | |
877 | /* Add threads for any new LWPs in a process. | |
878 | ||
879 | When LWP events are used, this function is only used to detect existing | |
880 | threads when attaching to a process. On older systems, this function is | |
881 | called to discover new threads each time the thread list is updated. */ | |
882 | ||
883 | static void | |
5b6d1e4f | 884 | fbsd_add_threads (fbsd_nat_target *target, pid_t pid) |
6e9567fe | 885 | { |
6e9567fe JB |
886 | int i, nlwps; |
887 | ||
5b6d1e4f | 888 | gdb_assert (!in_thread_list (target, ptid_t (pid))); |
6e9567fe JB |
889 | nlwps = ptrace (PT_GETNUMLWPS, pid, NULL, 0); |
890 | if (nlwps == -1) | |
5efac66c | 891 | perror_with_name (("ptrace (PT_GETNUMLWPS)")); |
6e9567fe | 892 | |
329d5e7e | 893 | gdb::unique_xmalloc_ptr<lwpid_t[]> lwps (XCNEWVEC (lwpid_t, nlwps)); |
6e9567fe | 894 | |
e4a26669 | 895 | nlwps = ptrace (PT_GETLWPLIST, pid, (caddr_t) lwps.get (), nlwps); |
6e9567fe | 896 | if (nlwps == -1) |
5efac66c | 897 | perror_with_name (("ptrace (PT_GETLWPLIST)")); |
6e9567fe JB |
898 | |
899 | for (i = 0; i < nlwps; i++) | |
900 | { | |
184ea2f7 | 901 | ptid_t ptid = ptid_t (pid, lwps[i]); |
6e9567fe | 902 | |
5b6d1e4f | 903 | if (!in_thread_list (target, ptid)) |
6e9567fe JB |
904 | { |
905 | #ifdef PT_LWP_EVENTS | |
906 | struct ptrace_lwpinfo pl; | |
907 | ||
908 | /* Don't add exited threads. Note that this is only called | |
909 | when attaching to a multi-threaded process. */ | |
329d5e7e | 910 | if (ptrace (PT_LWPINFO, lwps[i], (caddr_t) &pl, sizeof pl) == -1) |
5efac66c | 911 | perror_with_name (("ptrace (PT_LWPINFO)")); |
6e9567fe JB |
912 | if (pl.pl_flags & PL_FLAG_EXITED) |
913 | continue; | |
914 | #endif | |
c45ecc9d | 915 | fbsd_lwp_debug_printf ("adding thread for LWP %u", lwps[i]); |
5b6d1e4f | 916 | add_thread (target, ptid); |
6e9567fe JB |
917 | } |
918 | } | |
6e9567fe JB |
919 | } |
920 | ||
f6ac5f3d | 921 | /* Implement the "update_thread_list" target_ops method. */ |
6e9567fe | 922 | |
f6ac5f3d PA |
923 | void |
924 | fbsd_nat_target::update_thread_list () | |
6e9567fe JB |
925 | { |
926 | #ifdef PT_LWP_EVENTS | |
927 | /* With support for thread events, threads are added/deleted from the | |
928 | list as events are reported, so just try deleting exited threads. */ | |
929 | delete_exited_threads (); | |
930 | #else | |
931 | prune_threads (); | |
932 | ||
5b6d1e4f | 933 | fbsd_add_threads (this, inferior_ptid.pid ()); |
6e9567fe JB |
934 | #endif |
935 | } | |
936 | ||
9385df2a JB |
937 | /* Async mode support. */ |
938 | ||
9385df2a JB |
939 | /* Implement the "can_async_p" target method. */ |
940 | ||
941 | bool | |
942 | fbsd_nat_target::can_async_p () | |
943 | { | |
944 | /* This flag should be checked in the common target.c code. */ | |
945 | gdb_assert (target_async_permitted); | |
946 | ||
947 | /* Otherwise, this targets is always able to support async mode. */ | |
948 | return true; | |
949 | } | |
950 | ||
9385df2a JB |
951 | /* SIGCHLD handler notifies the event-loop in async mode. */ |
952 | ||
953 | static void | |
954 | sigchld_handler (int signo) | |
955 | { | |
956 | int old_errno = errno; | |
957 | ||
b146ba14 | 958 | fbsd_nat_target::async_file_mark_if_open (); |
9385df2a JB |
959 | |
960 | errno = old_errno; | |
961 | } | |
962 | ||
963 | /* Callback registered with the target events file descriptor. */ | |
964 | ||
965 | static void | |
966 | handle_target_event (int error, gdb_client_data client_data) | |
967 | { | |
968 | inferior_event_handler (INF_REG_EVENT); | |
969 | } | |
970 | ||
971 | /* Implement the "async" target method. */ | |
972 | ||
973 | void | |
4a570176 | 974 | fbsd_nat_target::async (bool enable) |
9385df2a | 975 | { |
4a570176 | 976 | if (enable == is_async_p ()) |
9385df2a JB |
977 | return; |
978 | ||
979 | /* Block SIGCHILD while we create/destroy the pipe, as the handler | |
980 | writes to it. */ | |
981 | gdb::block_signals blocker; | |
982 | ||
983 | if (enable) | |
984 | { | |
b146ba14 | 985 | if (!async_file_open ()) |
f34652de | 986 | internal_error ("failed to create event pipe."); |
9385df2a | 987 | |
b146ba14 | 988 | add_file_handler (async_wait_fd (), handle_target_event, NULL, "fbsd-nat"); |
9385df2a JB |
989 | |
990 | /* Trigger a poll in case there are pending events to | |
991 | handle. */ | |
b146ba14 | 992 | async_file_mark (); |
9385df2a JB |
993 | } |
994 | else | |
995 | { | |
b146ba14 JB |
996 | delete_file_handler (async_wait_fd ()); |
997 | async_file_close (); | |
9385df2a JB |
998 | } |
999 | } | |
1000 | ||
e58e05d6 JB |
1001 | #ifdef TDP_RFPPWAIT |
1002 | /* | |
1003 | To catch fork events, PT_FOLLOW_FORK is set on every traced process | |
1004 | to enable stops on returns from fork or vfork. Note that both the | |
1005 | parent and child will always stop, even if system call stops are not | |
1006 | enabled. | |
1007 | ||
1008 | After a fork, both the child and parent process will stop and report | |
1009 | an event. However, there is no guarantee of order. If the parent | |
1010 | reports its stop first, then fbsd_wait explicitly waits for the new | |
1011 | child before returning. If the child reports its stop first, then | |
1012 | the event is saved on a list and ignored until the parent's stop is | |
1013 | reported. fbsd_wait could have been changed to fetch the parent PID | |
1014 | of the new child and used that to wait for the parent explicitly. | |
1015 | However, if two threads in the parent fork at the same time, then | |
1016 | the wait on the parent might return the "wrong" fork event. | |
1017 | ||
1018 | The initial version of PT_FOLLOW_FORK did not set PL_FLAG_CHILD for | |
1019 | the new child process. This flag could be inferred by treating any | |
1020 | events for an unknown pid as a new child. | |
1021 | ||
1022 | In addition, the initial version of PT_FOLLOW_FORK did not report a | |
1023 | stop event for the parent process of a vfork until after the child | |
1024 | process executed a new program or exited. The kernel was changed to | |
1025 | defer the wait for exit or exec of the child until after posting the | |
1026 | stop event shortly after the change to introduce PL_FLAG_CHILD. | |
1027 | This could be worked around by reporting a vfork event when the | |
1028 | child event posted and ignoring the subsequent event from the | |
1029 | parent. | |
1030 | ||
1031 | This implementation requires both of these fixes for simplicity's | |
1032 | sake. FreeBSD versions newer than 9.1 contain both fixes. | |
1033 | */ | |
1034 | ||
e8c6b620 | 1035 | static std::list<ptid_t> fbsd_pending_children; |
e58e05d6 JB |
1036 | |
1037 | /* Record a new child process event that is reported before the | |
1038 | corresponding fork event in the parent. */ | |
1039 | ||
1040 | static void | |
6e9567fe | 1041 | fbsd_remember_child (ptid_t pid) |
e58e05d6 | 1042 | { |
e8c6b620 | 1043 | fbsd_pending_children.push_front (pid); |
e58e05d6 JB |
1044 | } |
1045 | ||
1046 | /* Check for a previously-recorded new child process event for PID. | |
6e9567fe | 1047 | If one is found, remove it from the list and return the PTID. */ |
e58e05d6 | 1048 | |
6e9567fe | 1049 | static ptid_t |
e58e05d6 JB |
1050 | fbsd_is_child_pending (pid_t pid) |
1051 | { | |
e8c6b620 JB |
1052 | for (auto it = fbsd_pending_children.begin (); |
1053 | it != fbsd_pending_children.end (); it++) | |
1054 | if (it->pid () == pid) | |
1055 | { | |
1056 | ptid_t ptid = *it; | |
1057 | fbsd_pending_children.erase (it); | |
1058 | return ptid; | |
1059 | } | |
6e9567fe | 1060 | return null_ptid; |
e58e05d6 | 1061 | } |
2c5c2a33 | 1062 | |
dbaed385 | 1063 | #ifndef PTRACE_VFORK |
e8c6b620 | 1064 | static std::forward_list<ptid_t> fbsd_pending_vfork_done; |
2c5c2a33 JB |
1065 | |
1066 | /* Record a pending vfork done event. */ | |
1067 | ||
1068 | static void | |
1069 | fbsd_add_vfork_done (ptid_t pid) | |
1070 | { | |
e8c6b620 | 1071 | fbsd_pending_vfork_done.push_front (pid); |
9385df2a JB |
1072 | |
1073 | /* If we're in async mode, need to tell the event loop there's | |
1074 | something here to process. */ | |
1075 | if (target_is_async_p ()) | |
b146ba14 | 1076 | async_file_mark (); |
2c5c2a33 JB |
1077 | } |
1078 | ||
1079 | /* Check for a pending vfork done event for a specific PID. */ | |
1080 | ||
1081 | static int | |
1082 | fbsd_is_vfork_done_pending (pid_t pid) | |
1083 | { | |
e8c6b620 JB |
1084 | for (auto it = fbsd_pending_vfork_done.begin (); |
1085 | it != fbsd_pending_vfork_done.end (); it++) | |
1086 | if (it->pid () == pid) | |
1087 | return 1; | |
2c5c2a33 JB |
1088 | return 0; |
1089 | } | |
1090 | ||
1091 | /* Check for a pending vfork done event. If one is found, remove it | |
1092 | from the list and return the PTID. */ | |
1093 | ||
ee950322 | 1094 | static ptid_t |
2c5c2a33 JB |
1095 | fbsd_next_vfork_done (void) |
1096 | { | |
e8c6b620 | 1097 | if (!fbsd_pending_vfork_done.empty ()) |
2c5c2a33 | 1098 | { |
e8c6b620 JB |
1099 | ptid_t ptid = fbsd_pending_vfork_done.front (); |
1100 | fbsd_pending_vfork_done.pop_front (); | |
2c5c2a33 JB |
1101 | return ptid; |
1102 | } | |
1103 | return null_ptid; | |
1104 | } | |
e58e05d6 | 1105 | #endif |
dbaed385 | 1106 | #endif |
e58e05d6 | 1107 | |
f6ac5f3d | 1108 | /* Implement the "resume" target_ops method. */ |
8607ea63 | 1109 | |
f6ac5f3d PA |
1110 | void |
1111 | fbsd_nat_target::resume (ptid_t ptid, int step, enum gdb_signal signo) | |
8607ea63 | 1112 | { |
dbaed385 | 1113 | #if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK) |
2c5c2a33 JB |
1114 | pid_t pid; |
1115 | ||
1116 | /* Don't PT_CONTINUE a process which has a pending vfork done event. */ | |
d7e15655 | 1117 | if (minus_one_ptid == ptid) |
e99b03dc | 1118 | pid = inferior_ptid.pid (); |
2c5c2a33 | 1119 | else |
e99b03dc | 1120 | pid = ptid.pid (); |
2c5c2a33 JB |
1121 | if (fbsd_is_vfork_done_pending (pid)) |
1122 | return; | |
1123 | #endif | |
8607ea63 | 1124 | |
1188bfcf JB |
1125 | fbsd_nat_debug_printf ("[%s], step %d, signo %d (%s)", |
1126 | target_pid_to_str (ptid).c_str (), step, signo, | |
1127 | gdb_signal_to_name (signo)); | |
15a9e13e | 1128 | if (ptid.lwp_p ()) |
8607ea63 JB |
1129 | { |
1130 | /* If ptid is a specific LWP, suspend all other LWPs in the process. */ | |
5b6d1e4f | 1131 | inferior *inf = find_inferior_ptid (this, ptid); |
d56060f0 | 1132 | |
08036331 | 1133 | for (thread_info *tp : inf->non_exited_threads ()) |
dda83cd7 | 1134 | { |
08036331 | 1135 | int request; |
d56060f0 | 1136 | |
e38504b3 | 1137 | if (tp->ptid.lwp () == ptid.lwp ()) |
d56060f0 JB |
1138 | request = PT_RESUME; |
1139 | else | |
1140 | request = PT_SUSPEND; | |
1141 | ||
e38504b3 | 1142 | if (ptrace (request, tp->ptid.lwp (), NULL, 0) == -1) |
5efac66c JB |
1143 | perror_with_name (request == PT_RESUME ? |
1144 | ("ptrace (PT_RESUME)") : | |
1145 | ("ptrace (PT_SUSPEND)")); | |
a3627b54 JB |
1146 | if (request == PT_RESUME) |
1147 | low_prepare_to_resume (tp); | |
d56060f0 | 1148 | } |
8607ea63 JB |
1149 | } |
1150 | else | |
1151 | { | |
1152 | /* If ptid is a wildcard, resume all matching threads (they won't run | |
1153 | until the process is continued however). */ | |
5b6d1e4f | 1154 | for (thread_info *tp : all_non_exited_threads (this, ptid)) |
a3627b54 JB |
1155 | { |
1156 | if (ptrace (PT_RESUME, tp->ptid.lwp (), NULL, 0) == -1) | |
1157 | perror_with_name (("ptrace (PT_RESUME)")); | |
1158 | low_prepare_to_resume (tp); | |
1159 | } | |
8607ea63 JB |
1160 | ptid = inferior_ptid; |
1161 | } | |
f169cfdc JB |
1162 | |
1163 | #if __FreeBSD_version < 1200052 | |
1164 | /* When multiple threads within a process wish to report STOPPED | |
1165 | events from wait(), the kernel picks one thread event as the | |
1166 | thread event to report. The chosen thread event is retrieved via | |
1167 | PT_LWPINFO by passing the process ID as the request pid. If | |
1168 | multiple events are pending, then the subsequent wait() after | |
1169 | resuming a process will report another STOPPED event after | |
1170 | resuming the process to handle the next thread event and so on. | |
1171 | ||
1172 | A single thread event is cleared as a side effect of resuming the | |
1173 | process with PT_CONTINUE, PT_STEP, etc. In older kernels, | |
1174 | however, the request pid was used to select which thread's event | |
1175 | was cleared rather than always clearing the event that was just | |
1176 | reported. To avoid clearing the event of the wrong LWP, always | |
1177 | pass the process ID instead of an LWP ID to PT_CONTINUE or | |
1178 | PT_SYSCALL. | |
1179 | ||
1180 | In the case of stepping, the process ID cannot be used with | |
1181 | PT_STEP since it would step the thread that reported an event | |
1182 | which may not be the thread indicated by PTID. For stepping, use | |
1183 | PT_SETSTEP to enable stepping on the desired thread before | |
1184 | resuming the process via PT_CONTINUE instead of using | |
1185 | PT_STEP. */ | |
1186 | if (step) | |
1187 | { | |
1188 | if (ptrace (PT_SETSTEP, get_ptrace_pid (ptid), NULL, 0) == -1) | |
5efac66c | 1189 | perror_with_name (("ptrace (PT_SETSTEP)")); |
f169cfdc JB |
1190 | step = 0; |
1191 | } | |
1192 | ptid = ptid_t (ptid.pid ()); | |
1193 | #endif | |
f6ac5f3d | 1194 | inf_ptrace_target::resume (ptid, step, signo); |
8607ea63 JB |
1195 | } |
1196 | ||
7efba073 JB |
1197 | #ifdef USE_SIGTRAP_SIGINFO |
1198 | /* Handle breakpoint and trace traps reported via SIGTRAP. If the | |
1199 | trap was a breakpoint or trace trap that should be reported to the | |
1200 | core, return true. */ | |
1201 | ||
1202 | static bool | |
5b6d1e4f PA |
1203 | fbsd_handle_debug_trap (fbsd_nat_target *target, ptid_t ptid, |
1204 | const struct ptrace_lwpinfo &pl) | |
7efba073 JB |
1205 | { |
1206 | ||
1207 | /* Ignore traps without valid siginfo or for signals other than | |
6d78332e JB |
1208 | SIGTRAP. |
1209 | ||
1210 | FreeBSD kernels prior to r341800 can return stale siginfo for at | |
1211 | least some events, but those events can be identified by | |
1212 | additional flags set in pl_flags. True breakpoint and | |
1213 | single-step traps should not have other flags set in | |
1214 | pl_flags. */ | |
1215 | if (pl.pl_flags != PL_FLAG_SI || pl.pl_siginfo.si_signo != SIGTRAP) | |
7efba073 JB |
1216 | return false; |
1217 | ||
1218 | /* Trace traps are either a single step or a hardware watchpoint or | |
1219 | breakpoint. */ | |
1220 | if (pl.pl_siginfo.si_code == TRAP_TRACE) | |
1221 | { | |
c45ecc9d | 1222 | fbsd_nat_debug_printf ("trace trap for LWP %ld", ptid.lwp ()); |
7efba073 JB |
1223 | return true; |
1224 | } | |
1225 | ||
1226 | if (pl.pl_siginfo.si_code == TRAP_BRKPT) | |
1227 | { | |
1228 | /* Fixup PC for the software breakpoint. */ | |
5b6d1e4f | 1229 | struct regcache *regcache = get_thread_regcache (target, ptid); |
7efba073 JB |
1230 | struct gdbarch *gdbarch = regcache->arch (); |
1231 | int decr_pc = gdbarch_decr_pc_after_break (gdbarch); | |
1232 | ||
c45ecc9d | 1233 | fbsd_nat_debug_printf ("sw breakpoint trap for LWP %ld", ptid.lwp ()); |
7efba073 JB |
1234 | if (decr_pc != 0) |
1235 | { | |
1236 | CORE_ADDR pc; | |
1237 | ||
1238 | pc = regcache_read_pc (regcache); | |
1239 | regcache_write_pc (regcache, pc - decr_pc); | |
1240 | } | |
1241 | return true; | |
1242 | } | |
1243 | ||
1244 | return false; | |
1245 | } | |
1246 | #endif | |
1247 | ||
e58e05d6 JB |
1248 | /* Wait for the child specified by PTID to do something. Return the |
1249 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
1250 | the status in *OURSTATUS. */ | |
1251 | ||
f6ac5f3d | 1252 | ptid_t |
9385df2a JB |
1253 | fbsd_nat_target::wait_1 (ptid_t ptid, struct target_waitstatus *ourstatus, |
1254 | target_wait_flags target_options) | |
e58e05d6 JB |
1255 | { |
1256 | ptid_t wptid; | |
1257 | ||
1258 | while (1) | |
1259 | { | |
dbaed385 | 1260 | #ifndef PTRACE_VFORK |
2c5c2a33 | 1261 | wptid = fbsd_next_vfork_done (); |
d7e15655 | 1262 | if (wptid != null_ptid) |
2c5c2a33 JB |
1263 | { |
1264 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1265 | return wptid; | |
1266 | } | |
dbaed385 | 1267 | #endif |
f6ac5f3d | 1268 | wptid = inf_ptrace_target::wait (ptid, ourstatus, target_options); |
183be222 | 1269 | if (ourstatus->kind () == TARGET_WAITKIND_STOPPED) |
e58e05d6 JB |
1270 | { |
1271 | struct ptrace_lwpinfo pl; | |
1272 | pid_t pid; | |
1273 | int status; | |
1274 | ||
e99b03dc | 1275 | pid = wptid.pid (); |
6e9567fe | 1276 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) |
5efac66c | 1277 | perror_with_name (("ptrace (PT_LWPINFO)")); |
e58e05d6 | 1278 | |
184ea2f7 | 1279 | wptid = ptid_t (pid, pl.pl_lwpid); |
6e9567fe | 1280 | |
386a8676 JB |
1281 | if (debug_fbsd_nat) |
1282 | { | |
c45ecc9d JB |
1283 | fbsd_nat_debug_printf ("stop for LWP %u event %d flags %#x", |
1284 | pl.pl_lwpid, pl.pl_event, pl.pl_flags); | |
386a8676 | 1285 | if (pl.pl_flags & PL_FLAG_SI) |
c45ecc9d JB |
1286 | fbsd_nat_debug_printf ("si_signo %u si_code %u", |
1287 | pl.pl_siginfo.si_signo, | |
1288 | pl.pl_siginfo.si_code); | |
386a8676 JB |
1289 | } |
1290 | ||
6e9567fe JB |
1291 | #ifdef PT_LWP_EVENTS |
1292 | if (pl.pl_flags & PL_FLAG_EXITED) | |
1293 | { | |
1294 | /* If GDB attaches to a multi-threaded process, exiting | |
f6ac5f3d | 1295 | threads might be skipped during post_attach that |
6e9567fe JB |
1296 | have not yet reported their PL_FLAG_EXITED event. |
1297 | Ignore EXITED events for an unknown LWP. */ | |
5b6d1e4f | 1298 | thread_info *thr = find_thread_ptid (this, wptid); |
b7a08269 | 1299 | if (thr != nullptr) |
6e9567fe | 1300 | { |
c45ecc9d JB |
1301 | fbsd_lwp_debug_printf ("deleting thread for LWP %u", |
1302 | pl.pl_lwpid); | |
6e9567fe | 1303 | if (print_thread_events) |
6cb06a8c TT |
1304 | gdb_printf (_("[%s exited]\n"), |
1305 | target_pid_to_str (wptid).c_str ()); | |
983b1119 | 1306 | low_delete_thread (thr); |
b7a08269 | 1307 | delete_thread (thr); |
6e9567fe JB |
1308 | } |
1309 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
5efac66c | 1310 | perror_with_name (("ptrace (PT_CONTINUE)")); |
6e9567fe JB |
1311 | continue; |
1312 | } | |
1313 | #endif | |
1314 | ||
1315 | /* Switch to an LWP PTID on the first stop in a new process. | |
1316 | This is done after handling PL_FLAG_EXITED to avoid | |
1317 | switching to an exited LWP. It is done before checking | |
1318 | PL_FLAG_BORN in case the first stop reported after | |
1319 | attaching to an existing process is a PL_FLAG_BORN | |
1320 | event. */ | |
5b6d1e4f | 1321 | if (in_thread_list (this, ptid_t (pid))) |
6e9567fe | 1322 | { |
c45ecc9d JB |
1323 | fbsd_lwp_debug_printf ("using LWP %u for first thread", |
1324 | pl.pl_lwpid); | |
5b6d1e4f | 1325 | thread_change_ptid (this, ptid_t (pid), wptid); |
6e9567fe JB |
1326 | } |
1327 | ||
1328 | #ifdef PT_LWP_EVENTS | |
1329 | if (pl.pl_flags & PL_FLAG_BORN) | |
1330 | { | |
1331 | /* If GDB attaches to a multi-threaded process, newborn | |
1332 | threads might be added by fbsd_add_threads that have | |
1333 | not yet reported their PL_FLAG_BORN event. Ignore | |
1334 | BORN events for an already-known LWP. */ | |
5b6d1e4f | 1335 | if (!in_thread_list (this, wptid)) |
6e9567fe | 1336 | { |
c45ecc9d JB |
1337 | fbsd_lwp_debug_printf ("adding thread for LWP %u", |
1338 | pl.pl_lwpid); | |
5b6d1e4f | 1339 | add_thread (this, wptid); |
6e9567fe | 1340 | } |
183be222 | 1341 | ourstatus->set_spurious (); |
6e9567fe JB |
1342 | return wptid; |
1343 | } | |
1344 | #endif | |
1345 | ||
e58e05d6 JB |
1346 | #ifdef TDP_RFPPWAIT |
1347 | if (pl.pl_flags & PL_FLAG_FORKED) | |
1348 | { | |
dbaed385 | 1349 | #ifndef PTRACE_VFORK |
e58e05d6 | 1350 | struct kinfo_proc kp; |
dbaed385 | 1351 | #endif |
183be222 | 1352 | bool is_vfork = false; |
6e9567fe | 1353 | ptid_t child_ptid; |
e58e05d6 JB |
1354 | pid_t child; |
1355 | ||
1356 | child = pl.pl_child_pid; | |
dbaed385 JB |
1357 | #ifdef PTRACE_VFORK |
1358 | if (pl.pl_flags & PL_FLAG_VFORKED) | |
183be222 | 1359 | is_vfork = true; |
dbaed385 | 1360 | #endif |
e58e05d6 JB |
1361 | |
1362 | /* Make sure the other end of the fork is stopped too. */ | |
6e9567fe | 1363 | child_ptid = fbsd_is_child_pending (child); |
d7e15655 | 1364 | if (child_ptid == null_ptid) |
e58e05d6 JB |
1365 | { |
1366 | pid = waitpid (child, &status, 0); | |
1367 | if (pid == -1) | |
1368 | perror_with_name (("waitpid")); | |
1369 | ||
1370 | gdb_assert (pid == child); | |
1371 | ||
1372 | if (ptrace (PT_LWPINFO, child, (caddr_t)&pl, sizeof pl) == -1) | |
5efac66c | 1373 | perror_with_name (("ptrace (PT_LWPINFO)")); |
e58e05d6 JB |
1374 | |
1375 | gdb_assert (pl.pl_flags & PL_FLAG_CHILD); | |
184ea2f7 | 1376 | child_ptid = ptid_t (child, pl.pl_lwpid); |
e58e05d6 JB |
1377 | } |
1378 | ||
5fa14c6b | 1379 | /* Enable additional events on the child process. */ |
e99b03dc | 1380 | fbsd_enable_proc_events (child_ptid.pid ()); |
5fa14c6b | 1381 | |
dbaed385 | 1382 | #ifndef PTRACE_VFORK |
e58e05d6 JB |
1383 | /* For vfork, the child process will have the P_PPWAIT |
1384 | flag set. */ | |
92fce24d JB |
1385 | if (fbsd_fetch_kinfo_proc (child, &kp)) |
1386 | { | |
1387 | if (kp.ki_flag & P_PPWAIT) | |
183be222 | 1388 | is_vfork = true; |
92fce24d JB |
1389 | } |
1390 | else | |
1391 | warning (_("Failed to fetch process information")); | |
dbaed385 | 1392 | #endif |
183be222 | 1393 | |
c77282d8 JB |
1394 | low_new_fork (wptid, child); |
1395 | ||
183be222 SM |
1396 | if (is_vfork) |
1397 | ourstatus->set_vforked (child_ptid); | |
1398 | else | |
1399 | ourstatus->set_forked (child_ptid); | |
e58e05d6 JB |
1400 | |
1401 | return wptid; | |
1402 | } | |
1403 | ||
1404 | if (pl.pl_flags & PL_FLAG_CHILD) | |
1405 | { | |
1406 | /* Remember that this child forked, but do not report it | |
1407 | until the parent reports its corresponding fork | |
1408 | event. */ | |
6e9567fe | 1409 | fbsd_remember_child (wptid); |
e58e05d6 JB |
1410 | continue; |
1411 | } | |
dbaed385 JB |
1412 | |
1413 | #ifdef PTRACE_VFORK | |
1414 | if (pl.pl_flags & PL_FLAG_VFORK_DONE) | |
1415 | { | |
183be222 | 1416 | ourstatus->set_vfork_done (); |
dbaed385 JB |
1417 | return wptid; |
1418 | } | |
1419 | #endif | |
e58e05d6 | 1420 | #endif |
d2b41ca0 | 1421 | |
d2b41ca0 JB |
1422 | if (pl.pl_flags & PL_FLAG_EXEC) |
1423 | { | |
183be222 SM |
1424 | ourstatus->set_execd |
1425 | (make_unique_xstrdup (pid_to_exec_file (pid))); | |
d2b41ca0 JB |
1426 | return wptid; |
1427 | } | |
e6cdd38e | 1428 | |
7efba073 | 1429 | #ifdef USE_SIGTRAP_SIGINFO |
5b6d1e4f | 1430 | if (fbsd_handle_debug_trap (this, wptid, pl)) |
7efba073 JB |
1431 | return wptid; |
1432 | #endif | |
1433 | ||
e6cdd38e JB |
1434 | /* Note that PL_FLAG_SCE is set for any event reported while |
1435 | a thread is executing a system call in the kernel. In | |
1436 | particular, signals that interrupt a sleep in a system | |
1437 | call will report this flag as part of their event. Stops | |
1438 | explicitly for system call entry and exit always use | |
1439 | SIGTRAP, so only treat SIGTRAP events as system call | |
1440 | entry/exit events. */ | |
1441 | if (pl.pl_flags & (PL_FLAG_SCE | PL_FLAG_SCX) | |
183be222 | 1442 | && ourstatus->sig () == SIGTRAP) |
e6cdd38e JB |
1443 | { |
1444 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1445 | if (catch_syscall_enabled ()) | |
1446 | { | |
1447 | if (catching_syscall_number (pl.pl_syscall_code)) | |
1448 | { | |
1449 | if (pl.pl_flags & PL_FLAG_SCE) | |
183be222 | 1450 | ourstatus->set_syscall_entry (pl.pl_syscall_code); |
e6cdd38e | 1451 | else |
183be222 SM |
1452 | ourstatus->set_syscall_return (pl.pl_syscall_code); |
1453 | ||
e6cdd38e JB |
1454 | return wptid; |
1455 | } | |
1456 | } | |
1457 | #endif | |
1458 | /* If the core isn't interested in this event, just | |
1459 | continue the process explicitly and wait for another | |
1460 | event. Note that PT_SYSCALL is "sticky" on FreeBSD | |
1461 | and once system call stops are enabled on a process | |
1462 | it stops for all system call entries and exits. */ | |
1463 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
5efac66c | 1464 | perror_with_name (("ptrace (PT_CONTINUE)")); |
e6cdd38e JB |
1465 | continue; |
1466 | } | |
e58e05d6 JB |
1467 | } |
1468 | return wptid; | |
1469 | } | |
1470 | } | |
1471 | ||
9385df2a JB |
1472 | ptid_t |
1473 | fbsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, | |
1474 | target_wait_flags target_options) | |
1475 | { | |
1476 | ptid_t wptid; | |
1477 | ||
1478 | fbsd_nat_debug_printf ("[%s], [%s]", target_pid_to_str (ptid).c_str (), | |
1479 | target_options_to_string (target_options).c_str ()); | |
1480 | ||
1481 | /* Ensure any subsequent events trigger a new event in the loop. */ | |
1482 | if (is_async_p ()) | |
b146ba14 | 1483 | async_file_flush (); |
9385df2a JB |
1484 | |
1485 | wptid = wait_1 (ptid, ourstatus, target_options); | |
1486 | ||
1487 | /* If we are in async mode and found an event, there may still be | |
1488 | another event pending. Trigger the event pipe so that that the | |
1489 | event loop keeps polling until no event is returned. */ | |
1490 | if (is_async_p () | |
1491 | && ((ourstatus->kind () != TARGET_WAITKIND_IGNORE | |
1492 | && ourstatus->kind() != TARGET_WAITKIND_NO_RESUMED) | |
1493 | || ptid != minus_one_ptid)) | |
b146ba14 | 1494 | async_file_mark (); |
9385df2a JB |
1495 | |
1496 | fbsd_nat_debug_printf ("returning [%s], [%s]", | |
1497 | target_pid_to_str (wptid).c_str (), | |
1498 | ourstatus->to_string ().c_str ()); | |
1499 | return wptid; | |
1500 | } | |
1501 | ||
7efba073 | 1502 | #ifdef USE_SIGTRAP_SIGINFO |
f6ac5f3d | 1503 | /* Implement the "stopped_by_sw_breakpoint" target_ops method. */ |
7efba073 | 1504 | |
57810aa7 | 1505 | bool |
f6ac5f3d | 1506 | fbsd_nat_target::stopped_by_sw_breakpoint () |
7efba073 JB |
1507 | { |
1508 | struct ptrace_lwpinfo pl; | |
1509 | ||
1510 | if (ptrace (PT_LWPINFO, get_ptrace_pid (inferior_ptid), (caddr_t) &pl, | |
1511 | sizeof pl) == -1) | |
57810aa7 | 1512 | return false; |
7efba073 | 1513 | |
6d78332e | 1514 | return (pl.pl_flags == PL_FLAG_SI |
7efba073 JB |
1515 | && pl.pl_siginfo.si_signo == SIGTRAP |
1516 | && pl.pl_siginfo.si_code == TRAP_BRKPT); | |
1517 | } | |
1518 | ||
f6ac5f3d | 1519 | /* Implement the "supports_stopped_by_sw_breakpoint" target_ops |
7efba073 JB |
1520 | method. */ |
1521 | ||
57810aa7 | 1522 | bool |
f6ac5f3d | 1523 | fbsd_nat_target::supports_stopped_by_sw_breakpoint () |
7efba073 | 1524 | { |
57810aa7 | 1525 | return true; |
7efba073 | 1526 | } |
7efba073 JB |
1527 | #endif |
1528 | ||
09db4332 JB |
1529 | #ifdef PROC_ASLR_CTL |
1530 | class maybe_disable_address_space_randomization | |
1531 | { | |
1532 | public: | |
1533 | explicit maybe_disable_address_space_randomization (bool disable_randomization) | |
1534 | { | |
1535 | if (disable_randomization) | |
1536 | { | |
1537 | if (procctl (P_PID, getpid (), PROC_ASLR_STATUS, &m_aslr_ctl) == -1) | |
1538 | { | |
1539 | warning (_("Failed to fetch current address space randomization " | |
1540 | "status: %s"), safe_strerror (errno)); | |
1541 | return; | |
1542 | } | |
1543 | ||
1544 | m_aslr_ctl &= ~PROC_ASLR_ACTIVE; | |
1545 | if (m_aslr_ctl == PROC_ASLR_FORCE_DISABLE) | |
1546 | return; | |
1547 | ||
1548 | int ctl = PROC_ASLR_FORCE_DISABLE; | |
1549 | if (procctl (P_PID, getpid (), PROC_ASLR_CTL, &ctl) == -1) | |
1550 | { | |
1551 | warning (_("Error disabling address space randomization: %s"), | |
1552 | safe_strerror (errno)); | |
1553 | return; | |
1554 | } | |
1555 | ||
1556 | m_aslr_ctl_set = true; | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | ~maybe_disable_address_space_randomization () | |
1561 | { | |
1562 | if (m_aslr_ctl_set) | |
1563 | { | |
1564 | if (procctl (P_PID, getpid (), PROC_ASLR_CTL, &m_aslr_ctl) == -1) | |
1565 | warning (_("Error restoring address space randomization: %s"), | |
1566 | safe_strerror (errno)); | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | DISABLE_COPY_AND_ASSIGN (maybe_disable_address_space_randomization); | |
1571 | ||
1572 | private: | |
1573 | bool m_aslr_ctl_set = false; | |
1574 | int m_aslr_ctl = 0; | |
1575 | }; | |
1576 | #endif | |
1577 | ||
1578 | void | |
1579 | fbsd_nat_target::create_inferior (const char *exec_file, | |
1580 | const std::string &allargs, | |
1581 | char **env, int from_tty) | |
1582 | { | |
1583 | #ifdef PROC_ASLR_CTL | |
1584 | maybe_disable_address_space_randomization restore_aslr_ctl | |
1585 | (disable_randomization); | |
1586 | #endif | |
1587 | ||
1588 | inf_ptrace_target::create_inferior (exec_file, allargs, env, from_tty); | |
1589 | } | |
1590 | ||
e58e05d6 JB |
1591 | #ifdef TDP_RFPPWAIT |
1592 | /* Target hook for follow_fork. On entry and at return inferior_ptid is | |
1593 | the ptid of the followed inferior. */ | |
1594 | ||
e97007b6 | 1595 | void |
82d1f134 SM |
1596 | fbsd_nat_target::follow_fork (inferior *child_inf, ptid_t child_ptid, |
1597 | target_waitkind fork_kind, bool follow_child, | |
1598 | bool detach_fork) | |
e58e05d6 | 1599 | { |
82d1f134 SM |
1600 | inf_ptrace_target::follow_fork (child_inf, child_ptid, fork_kind, |
1601 | follow_child, detach_fork); | |
1602 | ||
bb2a62e6 | 1603 | if (!follow_child && detach_fork) |
e58e05d6 | 1604 | { |
3a849a34 | 1605 | pid_t child_pid = child_ptid.pid (); |
e58e05d6 JB |
1606 | |
1607 | /* Breakpoints have already been detached from the child by | |
1608 | infrun.c. */ | |
1609 | ||
1610 | if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1) | |
5efac66c | 1611 | perror_with_name (("ptrace (PT_DETACH)")); |
2c5c2a33 | 1612 | |
dbaed385 | 1613 | #ifndef PTRACE_VFORK |
183be222 | 1614 | if (fork_kind () == TARGET_WAITKIND_VFORKED) |
2c5c2a33 JB |
1615 | { |
1616 | /* We can't insert breakpoints until the child process has | |
1617 | finished with the shared memory region. The parent | |
1618 | process doesn't wait for the child process to exit or | |
1619 | exec until after it has been resumed from the ptrace stop | |
1620 | to report the fork. Once it has been resumed it doesn't | |
1621 | stop again before returning to userland, so there is no | |
1622 | reliable way to wait on the parent. | |
1623 | ||
1624 | We can't stay attached to the child to wait for an exec | |
1625 | or exit because it may invoke ptrace(PT_TRACE_ME) | |
1626 | (e.g. if the parent process is a debugger forking a new | |
1627 | child process). | |
1628 | ||
1629 | In the end, the best we can do is to make sure it runs | |
1630 | for a little while. Hopefully it will be out of range of | |
1631 | any breakpoints we reinsert. Usually this is only the | |
1632 | single-step breakpoint at vfork's return point. */ | |
1633 | ||
1634 | usleep (10000); | |
1635 | ||
1636 | /* Schedule a fake VFORK_DONE event to report on the next | |
1637 | wait. */ | |
1638 | fbsd_add_vfork_done (inferior_ptid); | |
1639 | } | |
dbaed385 | 1640 | #endif |
e58e05d6 | 1641 | } |
e58e05d6 JB |
1642 | } |
1643 | ||
f6ac5f3d PA |
1644 | int |
1645 | fbsd_nat_target::insert_fork_catchpoint (int pid) | |
e58e05d6 JB |
1646 | { |
1647 | return 0; | |
1648 | } | |
1649 | ||
f6ac5f3d PA |
1650 | int |
1651 | fbsd_nat_target::remove_fork_catchpoint (int pid) | |
e58e05d6 JB |
1652 | { |
1653 | return 0; | |
1654 | } | |
1655 | ||
f6ac5f3d PA |
1656 | int |
1657 | fbsd_nat_target::insert_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1658 | { |
1659 | return 0; | |
1660 | } | |
1661 | ||
f6ac5f3d PA |
1662 | int |
1663 | fbsd_nat_target::remove_vfork_catchpoint (int pid) | |
e58e05d6 JB |
1664 | { |
1665 | return 0; | |
1666 | } | |
6e9567fe | 1667 | #endif |
e58e05d6 | 1668 | |
200fd287 | 1669 | /* Implement the virtual inf_ptrace_target::post_startup_inferior method. */ |
e58e05d6 | 1670 | |
f6ac5f3d PA |
1671 | void |
1672 | fbsd_nat_target::post_startup_inferior (ptid_t pid) | |
e58e05d6 | 1673 | { |
e99b03dc | 1674 | fbsd_enable_proc_events (pid.pid ()); |
e58e05d6 JB |
1675 | } |
1676 | ||
f6ac5f3d | 1677 | /* Implement the "post_attach" target_ops method. */ |
e58e05d6 | 1678 | |
f6ac5f3d PA |
1679 | void |
1680 | fbsd_nat_target::post_attach (int pid) | |
e58e05d6 | 1681 | { |
da95a26c | 1682 | fbsd_enable_proc_events (pid); |
5b6d1e4f | 1683 | fbsd_add_threads (this, pid); |
6e9567fe | 1684 | } |
d2b41ca0 | 1685 | |
fe5ddfc3 | 1686 | /* Traced processes always stop after exec. */ |
d2b41ca0 | 1687 | |
f6ac5f3d PA |
1688 | int |
1689 | fbsd_nat_target::insert_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1690 | { |
1691 | return 0; | |
1692 | } | |
1693 | ||
f6ac5f3d PA |
1694 | int |
1695 | fbsd_nat_target::remove_exec_catchpoint (int pid) | |
d2b41ca0 JB |
1696 | { |
1697 | return 0; | |
1698 | } | |
e6cdd38e JB |
1699 | |
1700 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
f6ac5f3d PA |
1701 | int |
1702 | fbsd_nat_target::set_syscall_catchpoint (int pid, bool needed, | |
1703 | int any_count, | |
1704 | gdb::array_view<const int> syscall_counts) | |
e6cdd38e JB |
1705 | { |
1706 | ||
1707 | /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which | |
1708 | will catch all system call entries and exits. The system calls | |
1709 | are filtered by GDB rather than the kernel. */ | |
1710 | return 0; | |
1711 | } | |
1712 | #endif | |
e58e05d6 | 1713 | |
54904d81 JB |
1714 | bool |
1715 | fbsd_nat_target::supports_multi_process () | |
1716 | { | |
1717 | return true; | |
1718 | } | |
1719 | ||
09db4332 JB |
1720 | bool |
1721 | fbsd_nat_target::supports_disable_randomization () | |
1722 | { | |
1723 | #ifdef PROC_ASLR_CTL | |
1724 | return true; | |
1725 | #else | |
1726 | return false; | |
1727 | #endif | |
1728 | } | |
1729 | ||
5a680bf9 JB |
1730 | /* See fbsd-nat.h. */ |
1731 | ||
b95a31ed | 1732 | bool |
5a680bf9 JB |
1733 | fbsd_nat_target::fetch_register_set (struct regcache *regcache, int regnum, |
1734 | int fetch_op, const struct regset *regset, | |
1735 | void *regs, size_t size) | |
1736 | { | |
1737 | const struct regcache_map_entry *map | |
1738 | = (const struct regcache_map_entry *) regset->regmap; | |
1739 | pid_t pid = get_ptrace_pid (regcache->ptid ()); | |
1740 | ||
1741 | if (regnum == -1 || regcache_map_supplies (map, regnum, regcache->arch(), | |
1742 | size)) | |
1743 | { | |
1744 | if (ptrace (fetch_op, pid, (PTRACE_TYPE_ARG3) regs, 0) == -1) | |
1745 | perror_with_name (_("Couldn't get registers")); | |
1746 | ||
1747 | regcache->supply_regset (regset, regnum, regs, size); | |
b95a31ed | 1748 | return true; |
5a680bf9 | 1749 | } |
b95a31ed | 1750 | return false; |
5a680bf9 JB |
1751 | } |
1752 | ||
1753 | /* See fbsd-nat.h. */ | |
1754 | ||
b95a31ed | 1755 | bool |
5a680bf9 JB |
1756 | fbsd_nat_target::store_register_set (struct regcache *regcache, int regnum, |
1757 | int fetch_op, int store_op, | |
1758 | const struct regset *regset, void *regs, | |
1759 | size_t size) | |
1760 | { | |
1761 | const struct regcache_map_entry *map | |
1762 | = (const struct regcache_map_entry *) regset->regmap; | |
1763 | pid_t pid = get_ptrace_pid (regcache->ptid ()); | |
1764 | ||
1765 | if (regnum == -1 || regcache_map_supplies (map, regnum, regcache->arch(), | |
1766 | size)) | |
1767 | { | |
1768 | if (ptrace (fetch_op, pid, (PTRACE_TYPE_ARG3) regs, 0) == -1) | |
1769 | perror_with_name (_("Couldn't get registers")); | |
1770 | ||
1771 | regcache->collect_regset (regset, regnum, regs, size); | |
1772 | ||
1773 | if (ptrace (store_op, pid, (PTRACE_TYPE_ARG3) regs, 0) == -1) | |
1774 | perror_with_name (_("Couldn't write registers")); | |
b95a31ed | 1775 | return true; |
5a680bf9 | 1776 | } |
b95a31ed | 1777 | return false; |
5a680bf9 JB |
1778 | } |
1779 | ||
6719bc69 JB |
1780 | /* See fbsd-nat.h. */ |
1781 | ||
13db4a0c | 1782 | size_t |
40c23d88 JB |
1783 | fbsd_nat_target::have_regset (ptid_t ptid, int note) |
1784 | { | |
1785 | pid_t pid = get_ptrace_pid (ptid); | |
1786 | struct iovec iov; | |
1787 | ||
1788 | iov.iov_base = nullptr; | |
1789 | iov.iov_len = 0; | |
1790 | if (ptrace (PT_GETREGSET, pid, (PTRACE_TYPE_ARG3) &iov, note) == -1) | |
1791 | return 0; | |
1792 | return iov.iov_len; | |
1793 | } | |
1794 | ||
1795 | /* See fbsd-nat.h. */ | |
1796 | ||
1797 | bool | |
1798 | fbsd_nat_target::fetch_regset (struct regcache *regcache, int regnum, int note, | |
1799 | const struct regset *regset, void *regs, | |
1800 | size_t size) | |
1801 | { | |
1802 | const struct regcache_map_entry *map | |
1803 | = (const struct regcache_map_entry *) regset->regmap; | |
1804 | pid_t pid = get_ptrace_pid (regcache->ptid ()); | |
1805 | ||
1806 | if (regnum == -1 || regcache_map_supplies (map, regnum, regcache->arch(), | |
1807 | size)) | |
1808 | { | |
1809 | struct iovec iov; | |
1810 | ||
1811 | iov.iov_base = regs; | |
1812 | iov.iov_len = size; | |
1813 | if (ptrace (PT_GETREGSET, pid, (PTRACE_TYPE_ARG3) &iov, note) == -1) | |
1814 | perror_with_name (_("Couldn't get registers")); | |
1815 | ||
1816 | regcache->supply_regset (regset, regnum, regs, size); | |
1817 | return true; | |
1818 | } | |
1819 | return false; | |
1820 | } | |
1821 | ||
1822 | bool | |
1823 | fbsd_nat_target::store_regset (struct regcache *regcache, int regnum, int note, | |
1824 | const struct regset *regset, void *regs, | |
1825 | size_t size) | |
1826 | { | |
1827 | const struct regcache_map_entry *map | |
1828 | = (const struct regcache_map_entry *) regset->regmap; | |
1829 | pid_t pid = get_ptrace_pid (regcache->ptid ()); | |
1830 | ||
1831 | if (regnum == -1 || regcache_map_supplies (map, regnum, regcache->arch(), | |
1832 | size)) | |
1833 | { | |
1834 | struct iovec iov; | |
1835 | ||
1836 | iov.iov_base = regs; | |
1837 | iov.iov_len = size; | |
1838 | if (ptrace (PT_GETREGSET, pid, (PTRACE_TYPE_ARG3) &iov, note) == -1) | |
1839 | perror_with_name (_("Couldn't get registers")); | |
1840 | ||
1841 | regcache->collect_regset (regset, regnum, regs, size); | |
1842 | ||
1843 | if (ptrace (PT_SETREGSET, pid, (PTRACE_TYPE_ARG3) &iov, note) == -1) | |
1844 | perror_with_name (_("Couldn't write registers")); | |
1845 | return true; | |
1846 | } | |
1847 | return false; | |
1848 | } | |
1849 | ||
1850 | /* See fbsd-nat.h. */ | |
1851 | ||
6719bc69 JB |
1852 | bool |
1853 | fbsd_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo) | |
1854 | { | |
1855 | struct ptrace_lwpinfo pl; | |
1856 | pid_t pid = get_ptrace_pid (ptid); | |
1857 | ||
1858 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) | |
1859 | return false; | |
1860 | if (!(pl.pl_flags & PL_FLAG_SI)) | |
1861 | return false;; | |
1862 | *siginfo = pl.pl_siginfo; | |
1863 | return (true); | |
1864 | } | |
1865 | ||
6c265988 | 1866 | void _initialize_fbsd_nat (); |
6e9567fe | 1867 | void |
6c265988 | 1868 | _initialize_fbsd_nat () |
6e9567fe | 1869 | { |
6e9567fe JB |
1870 | add_setshow_boolean_cmd ("fbsd-lwp", class_maintenance, |
1871 | &debug_fbsd_lwp, _("\ | |
1872 | Set debugging of FreeBSD lwp module."), _("\ | |
1873 | Show debugging of FreeBSD lwp module."), _("\ | |
1874 | Enables printf debugging output."), | |
1875 | NULL, | |
1876 | &show_fbsd_lwp_debug, | |
1877 | &setdebuglist, &showdebuglist); | |
386a8676 JB |
1878 | add_setshow_boolean_cmd ("fbsd-nat", class_maintenance, |
1879 | &debug_fbsd_nat, _("\ | |
1880 | Set debugging of FreeBSD native target."), _("\ | |
1881 | Show debugging of FreeBSD native target."), _("\ | |
1882 | Enables printf debugging output."), | |
1883 | NULL, | |
1884 | &show_fbsd_nat_debug, | |
1885 | &setdebuglist, &showdebuglist); | |
9385df2a JB |
1886 | |
1887 | /* Install a SIGCHLD handler. */ | |
1888 | signal (SIGCHLD, sigchld_handler); | |
6e9567fe | 1889 | } |