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578c1c03 MK |
1 | /* Native-dependent code for FreeBSD. |
2 | ||
e2882c85 | 3 | Copyright (C) 2002-2018 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" | |
e4a26669 | 21 | #include "byte-vector.h" |
578c1c03 MK |
22 | #include "gdbcore.h" |
23 | #include "inferior.h" | |
24 | #include "regcache.h" | |
25 | #include "regset.h" | |
6e9567fe | 26 | #include "gdbcmd.h" |
2020b7ab | 27 | #include "gdbthread.h" |
cea6e4f1 | 28 | #include "gdb_wait.h" |
578c1c03 | 29 | #include <sys/types.h> |
68b9939a | 30 | #include <sys/procfs.h> |
e58e05d6 | 31 | #include <sys/ptrace.h> |
929edea9 | 32 | #include <sys/signal.h> |
68b9939a | 33 | #include <sys/sysctl.h> |
25268153 | 34 | #include <sys/user.h> |
92fce24d | 35 | #if defined(HAVE_KINFO_GETFILE) || defined(HAVE_KINFO_GETVMMAP) |
25268153 | 36 | #include <libutil.h> |
92fce24d JB |
37 | #endif |
38 | #if !defined(HAVE_KINFO_GETVMMAP) | |
142311d3 | 39 | #include "filestuff.h" |
25268153 | 40 | #endif |
578c1c03 MK |
41 | |
42 | #include "elf-bfd.h" | |
43 | #include "fbsd-nat.h" | |
92fce24d | 44 | #include "fbsd-tdep.h" |
578c1c03 | 45 | |
e8c6b620 JB |
46 | #include <list> |
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 | ||
8f60fe01 | 51 | static char * |
8dd27370 | 52 | fbsd_pid_to_exec_file (struct target_ops *self, int pid) |
578c1c03 | 53 | { |
f2feec98 | 54 | ssize_t len; |
b4ab256d HZ |
55 | static char buf[PATH_MAX]; |
56 | char name[PATH_MAX]; | |
578c1c03 | 57 | |
68b9939a | 58 | #ifdef KERN_PROC_PATHNAME |
f2feec98 | 59 | size_t buflen; |
68b9939a | 60 | int mib[4]; |
578c1c03 | 61 | |
68b9939a MK |
62 | mib[0] = CTL_KERN; |
63 | mib[1] = KERN_PROC; | |
64 | mib[2] = KERN_PROC_PATHNAME; | |
65 | mib[3] = pid; | |
f2feec98 JB |
66 | buflen = sizeof buf; |
67 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
b999e203 JB |
68 | /* The kern.proc.pathname.<pid> sysctl returns a length of zero |
69 | for processes without an associated executable such as kernel | |
70 | processes. */ | |
71 | return buflen == 0 ? NULL : buf; | |
68b9939a | 72 | #endif |
578c1c03 | 73 | |
b4ab256d HZ |
74 | xsnprintf (name, PATH_MAX, "/proc/%d/exe", pid); |
75 | len = readlink (name, buf, PATH_MAX - 1); | |
76 | if (len != -1) | |
68b9939a | 77 | { |
b4ab256d HZ |
78 | buf[len] = '\0'; |
79 | return buf; | |
68b9939a MK |
80 | } |
81 | ||
b4ab256d | 82 | return NULL; |
578c1c03 MK |
83 | } |
84 | ||
25268153 JB |
85 | #ifdef HAVE_KINFO_GETVMMAP |
86 | /* Iterate over all the memory regions in the current inferior, | |
87 | calling FUNC for each memory region. OBFD is passed as the last | |
88 | argument to FUNC. */ | |
89 | ||
8f60fe01 | 90 | static int |
25268153 JB |
91 | fbsd_find_memory_regions (struct target_ops *self, |
92 | find_memory_region_ftype func, void *obfd) | |
93 | { | |
94 | pid_t pid = ptid_get_pid (inferior_ptid); | |
e4a26669 | 95 | struct kinfo_vmentry *kve; |
25268153 | 96 | uint64_t size; |
25268153 JB |
97 | int i, nitems; |
98 | ||
262f62f5 | 99 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> |
e4a26669 | 100 | vmentl (kinfo_getvmmap (pid, &nitems)); |
25268153 JB |
101 | if (vmentl == NULL) |
102 | perror_with_name (_("Couldn't fetch VM map entries.")); | |
25268153 | 103 | |
e4a26669 | 104 | for (i = 0, kve = vmentl.get (); i < nitems; i++, kve++) |
25268153 | 105 | { |
25268153 JB |
106 | /* Skip unreadable segments and those where MAP_NOCORE has been set. */ |
107 | if (!(kve->kve_protection & KVME_PROT_READ) | |
108 | || kve->kve_flags & KVME_FLAG_NOCOREDUMP) | |
109 | continue; | |
110 | ||
111 | /* Skip segments with an invalid type. */ | |
112 | if (kve->kve_type != KVME_TYPE_DEFAULT | |
113 | && kve->kve_type != KVME_TYPE_VNODE | |
114 | && kve->kve_type != KVME_TYPE_SWAP | |
115 | && kve->kve_type != KVME_TYPE_PHYS) | |
116 | continue; | |
117 | ||
118 | size = kve->kve_end - kve->kve_start; | |
119 | if (info_verbose) | |
120 | { | |
121 | fprintf_filtered (gdb_stdout, | |
122 | "Save segment, %ld bytes at %s (%c%c%c)\n", | |
123 | (long) size, | |
124 | paddress (target_gdbarch (), kve->kve_start), | |
125 | kve->kve_protection & KVME_PROT_READ ? 'r' : '-', | |
126 | kve->kve_protection & KVME_PROT_WRITE ? 'w' : '-', | |
127 | kve->kve_protection & KVME_PROT_EXEC ? 'x' : '-'); | |
128 | } | |
129 | ||
130 | /* Invoke the callback function to create the corefile segment. | |
131 | Pass MODIFIED as true, we do not know the real modification state. */ | |
132 | func (kve->kve_start, size, kve->kve_protection & KVME_PROT_READ, | |
133 | kve->kve_protection & KVME_PROT_WRITE, | |
134 | kve->kve_protection & KVME_PROT_EXEC, 1, obfd); | |
135 | } | |
25268153 JB |
136 | return 0; |
137 | } | |
138 | #else | |
578c1c03 MK |
139 | static int |
140 | fbsd_read_mapping (FILE *mapfile, unsigned long *start, unsigned long *end, | |
141 | char *protection) | |
142 | { | |
143 | /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */ | |
144 | char buf[256]; | |
145 | int resident, privateresident; | |
146 | unsigned long obj; | |
147 | int ret = EOF; | |
148 | ||
149 | /* As of FreeBSD 5.0-RELEASE, the layout is described in | |
150 | /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a | |
151 | new column was added to the procfs map. Therefore we can't use | |
152 | fscanf since we need to support older releases too. */ | |
153 | if (fgets (buf, sizeof buf, mapfile) != NULL) | |
154 | ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end, | |
155 | &resident, &privateresident, &obj, protection); | |
156 | ||
157 | return (ret != 0 && ret != EOF); | |
158 | } | |
159 | ||
160 | /* Iterate over all the memory regions in the current inferior, | |
161 | calling FUNC for each memory region. OBFD is passed as the last | |
162 | argument to FUNC. */ | |
163 | ||
8f60fe01 | 164 | static int |
2e73927c TT |
165 | fbsd_find_memory_regions (struct target_ops *self, |
166 | find_memory_region_ftype func, void *obfd) | |
578c1c03 MK |
167 | { |
168 | pid_t pid = ptid_get_pid (inferior_ptid); | |
578c1c03 MK |
169 | unsigned long start, end, size; |
170 | char protection[4]; | |
171 | int read, write, exec; | |
172 | ||
e4a26669 JB |
173 | std::string mapfilename = string_printf ("/proc/%ld/map", (long) pid); |
174 | gdb_file_up mapfile (fopen (mapfilename.c_str (), "r")); | |
578c1c03 | 175 | if (mapfile == NULL) |
e4a26669 | 176 | error (_("Couldn't open %s."), mapfilename.c_str ()); |
578c1c03 MK |
177 | |
178 | if (info_verbose) | |
179 | fprintf_filtered (gdb_stdout, | |
e4a26669 | 180 | "Reading memory regions from %s\n", mapfilename.c_str ()); |
578c1c03 MK |
181 | |
182 | /* Now iterate until end-of-file. */ | |
7cd06d6e | 183 | while (fbsd_read_mapping (mapfile.get (), &start, &end, &protection[0])) |
578c1c03 MK |
184 | { |
185 | size = end - start; | |
186 | ||
187 | read = (strchr (protection, 'r') != 0); | |
188 | write = (strchr (protection, 'w') != 0); | |
189 | exec = (strchr (protection, 'x') != 0); | |
190 | ||
191 | if (info_verbose) | |
192 | { | |
193 | fprintf_filtered (gdb_stdout, | |
5af949e3 | 194 | "Save segment, %ld bytes at %s (%c%c%c)\n", |
f5656ead | 195 | size, paddress (target_gdbarch (), start), |
578c1c03 MK |
196 | read ? 'r' : '-', |
197 | write ? 'w' : '-', | |
198 | exec ? 'x' : '-'); | |
199 | } | |
200 | ||
4f69f4c2 JK |
201 | /* Invoke the callback function to create the corefile segment. |
202 | Pass MODIFIED as true, we do not know the real modification state. */ | |
203 | func (start, size, read, write, exec, 1, obfd); | |
578c1c03 MK |
204 | } |
205 | ||
578c1c03 MK |
206 | return 0; |
207 | } | |
25268153 | 208 | #endif |
8f60fe01 | 209 | |
92fce24d JB |
210 | /* Fetch the command line for a running process. */ |
211 | ||
212 | static gdb::unique_xmalloc_ptr<char> | |
213 | fbsd_fetch_cmdline (pid_t pid) | |
214 | { | |
215 | size_t len; | |
216 | int mib[4]; | |
217 | ||
218 | len = 0; | |
219 | mib[0] = CTL_KERN; | |
220 | mib[1] = KERN_PROC; | |
221 | mib[2] = KERN_PROC_ARGS; | |
222 | mib[3] = pid; | |
223 | if (sysctl (mib, 4, NULL, &len, NULL, 0) == -1) | |
224 | return nullptr; | |
225 | ||
226 | if (len == 0) | |
227 | return nullptr; | |
228 | ||
229 | gdb::unique_xmalloc_ptr<char> cmdline ((char *) xmalloc (len)); | |
230 | if (sysctl (mib, 4, cmdline.get (), &len, NULL, 0) == -1) | |
231 | return nullptr; | |
232 | ||
233 | return cmdline; | |
234 | } | |
235 | ||
236 | /* Fetch the external variant of the kernel's internal process | |
237 | structure for the process PID into KP. */ | |
238 | ||
239 | static bool | |
240 | fbsd_fetch_kinfo_proc (pid_t pid, struct kinfo_proc *kp) | |
241 | { | |
242 | size_t len; | |
243 | int mib[4]; | |
244 | ||
245 | len = sizeof *kp; | |
246 | mib[0] = CTL_KERN; | |
247 | mib[1] = KERN_PROC; | |
248 | mib[2] = KERN_PROC_PID; | |
249 | mib[3] = pid; | |
250 | return (sysctl (mib, 4, kp, &len, NULL, 0) == 0); | |
251 | } | |
252 | ||
253 | /* Implement the "to_info_proc target_ops" method. */ | |
254 | ||
255 | static void | |
256 | fbsd_info_proc (struct target_ops *ops, const char *args, | |
257 | enum info_proc_what what) | |
258 | { | |
259 | #ifdef HAVE_KINFO_GETFILE | |
260 | gdb::unique_xmalloc_ptr<struct kinfo_file> fdtbl; | |
261 | int nfd = 0; | |
262 | #endif | |
263 | struct kinfo_proc kp; | |
264 | char *tmp; | |
265 | pid_t pid; | |
266 | bool do_cmdline = false; | |
267 | bool do_cwd = false; | |
268 | bool do_exe = false; | |
269 | #ifdef HAVE_KINFO_GETVMMAP | |
270 | bool do_mappings = false; | |
271 | #endif | |
272 | bool do_status = false; | |
273 | ||
274 | switch (what) | |
275 | { | |
276 | case IP_MINIMAL: | |
277 | do_cmdline = true; | |
278 | do_cwd = true; | |
279 | do_exe = true; | |
280 | break; | |
281 | #ifdef HAVE_KINFO_GETVMMAP | |
282 | case IP_MAPPINGS: | |
283 | do_mappings = true; | |
284 | break; | |
285 | #endif | |
286 | case IP_STATUS: | |
287 | case IP_STAT: | |
288 | do_status = true; | |
289 | break; | |
290 | case IP_CMDLINE: | |
291 | do_cmdline = true; | |
292 | break; | |
293 | case IP_EXE: | |
294 | do_exe = true; | |
295 | break; | |
296 | case IP_CWD: | |
297 | do_cwd = true; | |
298 | break; | |
299 | case IP_ALL: | |
300 | do_cmdline = true; | |
301 | do_cwd = true; | |
302 | do_exe = true; | |
303 | #ifdef HAVE_KINFO_GETVMMAP | |
304 | do_mappings = true; | |
305 | #endif | |
306 | do_status = true; | |
307 | break; | |
308 | default: | |
309 | error (_("Not supported on this target.")); | |
310 | } | |
311 | ||
312 | gdb_argv built_argv (args); | |
313 | if (built_argv.count () == 0) | |
314 | { | |
315 | pid = ptid_get_pid (inferior_ptid); | |
316 | if (pid == 0) | |
317 | error (_("No current process: you must name one.")); | |
318 | } | |
319 | else if (built_argv.count () == 1 && isdigit (built_argv[0][0])) | |
320 | pid = strtol (built_argv[0], NULL, 10); | |
321 | else | |
322 | error (_("Invalid arguments.")); | |
323 | ||
324 | printf_filtered (_("process %d\n"), pid); | |
325 | #ifdef HAVE_KINFO_GETFILE | |
326 | if (do_cwd || do_exe) | |
327 | fdtbl.reset (kinfo_getfile (pid, &nfd)); | |
328 | #endif | |
329 | ||
330 | if (do_cmdline) | |
331 | { | |
332 | gdb::unique_xmalloc_ptr<char> cmdline = fbsd_fetch_cmdline (pid); | |
333 | if (cmdline != nullptr) | |
334 | printf_filtered ("cmdline = '%s'\n", cmdline.get ()); | |
335 | else | |
336 | warning (_("unable to fetch command line")); | |
337 | } | |
338 | if (do_cwd) | |
339 | { | |
340 | const char *cwd = NULL; | |
341 | #ifdef HAVE_KINFO_GETFILE | |
342 | struct kinfo_file *kf = fdtbl.get (); | |
343 | for (int i = 0; i < nfd; i++, kf++) | |
344 | { | |
345 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_CWD) | |
346 | { | |
347 | cwd = kf->kf_path; | |
348 | break; | |
349 | } | |
350 | } | |
351 | #endif | |
352 | if (cwd != NULL) | |
353 | printf_filtered ("cwd = '%s'\n", cwd); | |
354 | else | |
355 | warning (_("unable to fetch current working directory")); | |
356 | } | |
357 | if (do_exe) | |
358 | { | |
359 | const char *exe = NULL; | |
360 | #ifdef HAVE_KINFO_GETFILE | |
361 | struct kinfo_file *kf = fdtbl.get (); | |
362 | for (int i = 0; i < nfd; i++, kf++) | |
363 | { | |
364 | if (kf->kf_type == KF_TYPE_VNODE && kf->kf_fd == KF_FD_TYPE_TEXT) | |
365 | { | |
366 | exe = kf->kf_path; | |
367 | break; | |
368 | } | |
369 | } | |
370 | #endif | |
371 | if (exe == NULL) | |
372 | exe = fbsd_pid_to_exec_file (ops, pid); | |
373 | if (exe != NULL) | |
374 | printf_filtered ("exe = '%s'\n", exe); | |
375 | else | |
376 | warning (_("unable to fetch executable path name")); | |
377 | } | |
378 | #ifdef HAVE_KINFO_GETVMMAP | |
379 | if (do_mappings) | |
380 | { | |
381 | int nvment; | |
382 | gdb::unique_xmalloc_ptr<struct kinfo_vmentry> | |
383 | vmentl (kinfo_getvmmap (pid, &nvment)); | |
384 | ||
385 | if (vmentl != nullptr) | |
386 | { | |
387 | printf_filtered (_("Mapped address spaces:\n\n")); | |
388 | #ifdef __LP64__ | |
389 | printf_filtered (" %18s %18s %10s %10s %9s %s\n", | |
390 | "Start Addr", | |
391 | " End Addr", | |
392 | " Size", " Offset", "Flags ", "File"); | |
393 | #else | |
394 | printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", | |
395 | "Start Addr", | |
396 | " End Addr", | |
397 | " Size", " Offset", "Flags ", "File"); | |
398 | #endif | |
399 | ||
400 | struct kinfo_vmentry *kve = vmentl.get (); | |
401 | for (int i = 0; i < nvment; i++, kve++) | |
402 | { | |
403 | ULONGEST start, end; | |
404 | ||
405 | start = kve->kve_start; | |
406 | end = kve->kve_end; | |
407 | #ifdef __LP64__ | |
408 | printf_filtered (" %18s %18s %10s %10s %9s %s\n", | |
409 | hex_string (start), | |
410 | hex_string (end), | |
411 | hex_string (end - start), | |
412 | hex_string (kve->kve_offset), | |
413 | fbsd_vm_map_entry_flags (kve->kve_flags, | |
414 | kve->kve_protection), | |
415 | kve->kve_path); | |
416 | #else | |
417 | printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", | |
418 | hex_string (start), | |
419 | hex_string (end), | |
420 | hex_string (end - start), | |
421 | hex_string (kve->kve_offset), | |
422 | fbsd_vm_map_entry_flags (kve->kve_flags, | |
423 | kve->kve_protection), | |
424 | kve->kve_path); | |
425 | #endif | |
426 | } | |
427 | } | |
428 | else | |
429 | warning (_("unable to fetch virtual memory map")); | |
430 | } | |
431 | #endif | |
432 | if (do_status) | |
433 | { | |
434 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) | |
435 | warning (_("Failed to fetch process information")); | |
436 | else | |
437 | { | |
438 | const char *state; | |
439 | int pgtok; | |
440 | ||
441 | printf_filtered ("Name: %s\n", kp.ki_comm); | |
442 | switch (kp.ki_stat) | |
443 | { | |
444 | case SIDL: | |
445 | state = "I (idle)"; | |
446 | break; | |
447 | case SRUN: | |
448 | state = "R (running)"; | |
449 | break; | |
450 | case SSTOP: | |
451 | state = "T (stopped)"; | |
452 | break; | |
453 | case SZOMB: | |
454 | state = "Z (zombie)"; | |
455 | break; | |
456 | case SSLEEP: | |
457 | state = "S (sleeping)"; | |
458 | break; | |
459 | case SWAIT: | |
460 | state = "W (interrupt wait)"; | |
461 | break; | |
462 | case SLOCK: | |
463 | state = "L (blocked on lock)"; | |
464 | break; | |
465 | default: | |
466 | state = "? (unknown)"; | |
467 | break; | |
468 | } | |
469 | printf_filtered ("State: %s\n", state); | |
470 | printf_filtered ("Parent process: %d\n", kp.ki_ppid); | |
471 | printf_filtered ("Process group: %d\n", kp.ki_pgid); | |
472 | printf_filtered ("Session id: %d\n", kp.ki_sid); | |
473 | printf_filtered ("TTY: %ju\n", (uintmax_t) kp.ki_tdev); | |
474 | printf_filtered ("TTY owner process group: %d\n", kp.ki_tpgid); | |
475 | printf_filtered ("User IDs (real, effective, saved): %d %d %d\n", | |
476 | kp.ki_ruid, kp.ki_uid, kp.ki_svuid); | |
477 | printf_filtered ("Group IDs (real, effective, saved): %d %d %d\n", | |
478 | kp.ki_rgid, kp.ki_groups[0], kp.ki_svgid); | |
479 | printf_filtered ("Groups: "); | |
480 | for (int i = 0; i < kp.ki_ngroups; i++) | |
481 | printf_filtered ("%d ", kp.ki_groups[i]); | |
482 | printf_filtered ("\n"); | |
483 | printf_filtered ("Minor faults (no memory page): %ld\n", | |
484 | kp.ki_rusage.ru_minflt); | |
485 | printf_filtered ("Minor faults, children: %ld\n", | |
486 | kp.ki_rusage_ch.ru_minflt); | |
487 | printf_filtered ("Major faults (memory page faults): %ld\n", | |
488 | kp.ki_rusage.ru_majflt); | |
489 | printf_filtered ("Major faults, children: %ld\n", | |
490 | kp.ki_rusage_ch.ru_majflt); | |
491 | printf_filtered ("utime: %jd.%06ld\n", | |
492 | (intmax_t) kp.ki_rusage.ru_utime.tv_sec, | |
493 | kp.ki_rusage.ru_utime.tv_usec); | |
494 | printf_filtered ("stime: %jd.%06ld\n", | |
495 | (intmax_t) kp.ki_rusage.ru_stime.tv_sec, | |
496 | kp.ki_rusage.ru_stime.tv_usec); | |
497 | printf_filtered ("utime, children: %jd.%06ld\n", | |
498 | (intmax_t) kp.ki_rusage_ch.ru_utime.tv_sec, | |
499 | kp.ki_rusage_ch.ru_utime.tv_usec); | |
500 | printf_filtered ("stime, children: %jd.%06ld\n", | |
501 | (intmax_t) kp.ki_rusage_ch.ru_stime.tv_sec, | |
502 | kp.ki_rusage_ch.ru_stime.tv_usec); | |
503 | printf_filtered ("'nice' value: %d\n", kp.ki_nice); | |
504 | printf_filtered ("Start time: %jd.%06ld\n", kp.ki_start.tv_sec, | |
505 | kp.ki_start.tv_usec); | |
506 | pgtok = getpagesize () / 1024; | |
507 | printf_filtered ("Virtual memory size: %ju kB\n", | |
508 | (uintmax_t) kp.ki_size / 1024); | |
509 | printf_filtered ("Data size: %ju kB\n", | |
510 | (uintmax_t) kp.ki_dsize * pgtok); | |
511 | printf_filtered ("Stack size: %ju kB\n", | |
512 | (uintmax_t) kp.ki_ssize * pgtok); | |
513 | printf_filtered ("Text size: %ju kB\n", | |
514 | (uintmax_t) kp.ki_tsize * pgtok); | |
515 | printf_filtered ("Resident set size: %ju kB\n", | |
516 | (uintmax_t) kp.ki_rssize * pgtok); | |
517 | printf_filtered ("Maximum RSS: %ju kB\n", | |
518 | (uintmax_t) kp.ki_rusage.ru_maxrss); | |
519 | printf_filtered ("Pending Signals: "); | |
520 | for (int i = 0; i < _SIG_WORDS; i++) | |
521 | printf_filtered ("%08x ", kp.ki_siglist.__bits[i]); | |
522 | printf_filtered ("\n"); | |
523 | printf_filtered ("Ignored Signals: "); | |
524 | for (int i = 0; i < _SIG_WORDS; i++) | |
525 | printf_filtered ("%08x ", kp.ki_sigignore.__bits[i]); | |
526 | printf_filtered ("\n"); | |
527 | printf_filtered ("Caught Signals: "); | |
528 | for (int i = 0; i < _SIG_WORDS; i++) | |
529 | printf_filtered ("%08x ", kp.ki_sigcatch.__bits[i]); | |
530 | printf_filtered ("\n"); | |
531 | } | |
532 | } | |
533 | } | |
534 | ||
7697fc9e JB |
535 | #ifdef KERN_PROC_AUXV |
536 | static enum target_xfer_status (*super_xfer_partial) (struct target_ops *ops, | |
537 | enum target_object object, | |
538 | const char *annex, | |
539 | gdb_byte *readbuf, | |
540 | const gdb_byte *writebuf, | |
541 | ULONGEST offset, | |
542 | ULONGEST len, | |
543 | ULONGEST *xfered_len); | |
544 | ||
929edea9 JB |
545 | #ifdef PT_LWPINFO |
546 | /* Return the size of siginfo for the current inferior. */ | |
547 | ||
548 | #ifdef __LP64__ | |
549 | union sigval32 { | |
550 | int sival_int; | |
551 | uint32_t sival_ptr; | |
552 | }; | |
553 | ||
554 | /* This structure matches the naming and layout of `siginfo_t' in | |
555 | <sys/signal.h>. In particular, the `si_foo' macros defined in that | |
556 | header can be used with both types to copy fields in the `_reason' | |
557 | union. */ | |
558 | ||
559 | struct siginfo32 | |
560 | { | |
561 | int si_signo; | |
562 | int si_errno; | |
563 | int si_code; | |
564 | __pid_t si_pid; | |
565 | __uid_t si_uid; | |
566 | int si_status; | |
567 | uint32_t si_addr; | |
568 | union sigval32 si_value; | |
569 | union | |
570 | { | |
571 | struct | |
572 | { | |
573 | int _trapno; | |
574 | } _fault; | |
575 | struct | |
576 | { | |
577 | int _timerid; | |
578 | int _overrun; | |
579 | } _timer; | |
580 | struct | |
581 | { | |
582 | int _mqd; | |
583 | } _mesgq; | |
584 | struct | |
585 | { | |
586 | int32_t _band; | |
587 | } _poll; | |
588 | struct | |
589 | { | |
590 | int32_t __spare1__; | |
591 | int __spare2__[7]; | |
592 | } __spare__; | |
593 | } _reason; | |
594 | }; | |
595 | #endif | |
596 | ||
597 | static size_t | |
598 | fbsd_siginfo_size () | |
599 | { | |
600 | #ifdef __LP64__ | |
601 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
602 | ||
603 | /* Is the inferior 32-bit? If so, use the 32-bit siginfo size. */ | |
a181c0bf | 604 | if (gdbarch_long_bit (gdbarch) == 32) |
929edea9 JB |
605 | return sizeof (struct siginfo32); |
606 | #endif | |
607 | return sizeof (siginfo_t); | |
608 | } | |
609 | ||
610 | /* Convert a native 64-bit siginfo object to a 32-bit object. Note | |
611 | that FreeBSD doesn't support writing to $_siginfo, so this only | |
612 | needs to convert one way. */ | |
613 | ||
614 | static void | |
615 | fbsd_convert_siginfo (siginfo_t *si) | |
616 | { | |
617 | #ifdef __LP64__ | |
618 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); | |
619 | ||
620 | /* Is the inferior 32-bit? If not, nothing to do. */ | |
a181c0bf | 621 | if (gdbarch_long_bit (gdbarch) != 32) |
929edea9 JB |
622 | return; |
623 | ||
624 | struct siginfo32 si32; | |
625 | ||
626 | si32.si_signo = si->si_signo; | |
627 | si32.si_errno = si->si_errno; | |
628 | si32.si_code = si->si_code; | |
629 | si32.si_pid = si->si_pid; | |
630 | si32.si_uid = si->si_uid; | |
631 | si32.si_status = si->si_status; | |
632 | si32.si_addr = (uintptr_t) si->si_addr; | |
633 | ||
634 | /* If sival_ptr is being used instead of sival_int on a big-endian | |
635 | platform, then sival_int will be zero since it holds the upper | |
636 | 32-bits of the pointer value. */ | |
637 | #if _BYTE_ORDER == _BIG_ENDIAN | |
638 | if (si->si_value.sival_int == 0) | |
0335ac6d | 639 | si32.si_value.sival_ptr = (uintptr_t) si->si_value.sival_ptr; |
929edea9 JB |
640 | else |
641 | si32.si_value.sival_int = si->si_value.sival_int; | |
642 | #else | |
643 | si32.si_value.sival_int = si->si_value.sival_int; | |
644 | #endif | |
645 | ||
646 | /* Always copy the spare fields and then possibly overwrite them for | |
647 | signal-specific or code-specific fields. */ | |
648 | si32._reason.__spare__.__spare1__ = si->_reason.__spare__.__spare1__; | |
649 | for (int i = 0; i < 7; i++) | |
650 | si32._reason.__spare__.__spare2__[i] = si->_reason.__spare__.__spare2__[i]; | |
651 | switch (si->si_signo) { | |
652 | case SIGILL: | |
653 | case SIGFPE: | |
654 | case SIGSEGV: | |
655 | case SIGBUS: | |
656 | si32.si_trapno = si->si_trapno; | |
657 | break; | |
658 | } | |
659 | switch (si->si_code) { | |
660 | case SI_TIMER: | |
661 | si32.si_timerid = si->si_timerid; | |
662 | si32.si_overrun = si->si_overrun; | |
663 | break; | |
664 | case SI_MESGQ: | |
665 | si32.si_mqd = si->si_mqd; | |
666 | break; | |
667 | } | |
668 | ||
669 | memcpy(si, &si32, sizeof (si32)); | |
670 | #endif | |
671 | } | |
672 | #endif | |
673 | ||
7697fc9e JB |
674 | /* Implement the "to_xfer_partial target_ops" method. */ |
675 | ||
676 | static enum target_xfer_status | |
677 | fbsd_xfer_partial (struct target_ops *ops, enum target_object object, | |
678 | const char *annex, gdb_byte *readbuf, | |
679 | const gdb_byte *writebuf, | |
680 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) | |
681 | { | |
682 | pid_t pid = ptid_get_pid (inferior_ptid); | |
683 | ||
684 | switch (object) | |
685 | { | |
929edea9 JB |
686 | #ifdef PT_LWPINFO |
687 | case TARGET_OBJECT_SIGNAL_INFO: | |
688 | { | |
689 | struct ptrace_lwpinfo pl; | |
690 | size_t siginfo_size; | |
691 | ||
692 | /* FreeBSD doesn't support writing to $_siginfo. */ | |
693 | if (writebuf != NULL) | |
694 | return TARGET_XFER_E_IO; | |
695 | ||
696 | if (inferior_ptid.lwp_p ()) | |
697 | pid = inferior_ptid.lwp (); | |
698 | ||
699 | siginfo_size = fbsd_siginfo_size (); | |
700 | if (offset > siginfo_size) | |
701 | return TARGET_XFER_E_IO; | |
702 | ||
703 | if (ptrace (PT_LWPINFO, pid, (PTRACE_TYPE_ARG3) &pl, sizeof (pl)) == -1) | |
704 | return TARGET_XFER_E_IO; | |
705 | ||
706 | if (!(pl.pl_flags & PL_FLAG_SI)) | |
707 | return TARGET_XFER_E_IO; | |
708 | ||
709 | fbsd_convert_siginfo (&pl.pl_siginfo); | |
710 | if (offset + len > siginfo_size) | |
711 | len = siginfo_size - offset; | |
712 | ||
713 | memcpy (readbuf, ((gdb_byte *) &pl.pl_siginfo) + offset, len); | |
714 | *xfered_len = len; | |
715 | return TARGET_XFER_OK; | |
716 | } | |
717 | #endif | |
7697fc9e JB |
718 | case TARGET_OBJECT_AUXV: |
719 | { | |
e4a26669 JB |
720 | gdb::byte_vector buf_storage; |
721 | gdb_byte *buf; | |
7697fc9e JB |
722 | size_t buflen; |
723 | int mib[4]; | |
724 | ||
725 | if (writebuf != NULL) | |
726 | return TARGET_XFER_E_IO; | |
727 | mib[0] = CTL_KERN; | |
728 | mib[1] = KERN_PROC; | |
729 | mib[2] = KERN_PROC_AUXV; | |
730 | mib[3] = pid; | |
731 | if (offset == 0) | |
732 | { | |
733 | buf = readbuf; | |
734 | buflen = len; | |
735 | } | |
736 | else | |
737 | { | |
738 | buflen = offset + len; | |
e4a26669 JB |
739 | buf_storage.resize (buflen); |
740 | buf = buf_storage.data (); | |
7697fc9e JB |
741 | } |
742 | if (sysctl (mib, 4, buf, &buflen, NULL, 0) == 0) | |
743 | { | |
744 | if (offset != 0) | |
745 | { | |
746 | if (buflen > offset) | |
747 | { | |
748 | buflen -= offset; | |
749 | memcpy (readbuf, buf + offset, buflen); | |
750 | } | |
751 | else | |
752 | buflen = 0; | |
753 | } | |
7697fc9e JB |
754 | *xfered_len = buflen; |
755 | return (buflen == 0) ? TARGET_XFER_EOF : TARGET_XFER_OK; | |
756 | } | |
7697fc9e JB |
757 | return TARGET_XFER_E_IO; |
758 | } | |
759 | default: | |
760 | return super_xfer_partial (ops, object, annex, readbuf, writebuf, offset, | |
761 | len, xfered_len); | |
762 | } | |
763 | } | |
764 | #endif | |
765 | ||
e58e05d6 | 766 | #ifdef PT_LWPINFO |
6e9567fe JB |
767 | static int debug_fbsd_lwp; |
768 | ||
8607ea63 JB |
769 | static void (*super_resume) (struct target_ops *, |
770 | ptid_t, | |
771 | int, | |
772 | enum gdb_signal); | |
e58e05d6 JB |
773 | static ptid_t (*super_wait) (struct target_ops *, |
774 | ptid_t, | |
775 | struct target_waitstatus *, | |
776 | int); | |
777 | ||
6e9567fe JB |
778 | static void |
779 | show_fbsd_lwp_debug (struct ui_file *file, int from_tty, | |
780 | struct cmd_list_element *c, const char *value) | |
781 | { | |
782 | fprintf_filtered (file, _("Debugging of FreeBSD lwp module is %s.\n"), value); | |
783 | } | |
784 | ||
6e9567fe JB |
785 | /* |
786 | FreeBSD's first thread support was via a "reentrant" version of libc | |
787 | (libc_r) that first shipped in 2.2.7. This library multiplexed all | |
788 | of the threads in a process onto a single kernel thread. This | |
4c7bf4f9 | 789 | library was supported via the bsd-uthread target. |
6e9567fe JB |
790 | |
791 | FreeBSD 5.1 introduced two new threading libraries that made use of | |
792 | multiple kernel threads. The first (libkse) scheduled M user | |
793 | threads onto N (<= M) kernel threads (LWPs). The second (libthr) | |
794 | bound each user thread to a dedicated kernel thread. libkse shipped | |
795 | as the default threading library (libpthread). | |
796 | ||
797 | FreeBSD 5.3 added a libthread_db to abstract the interface across | |
798 | the various thread libraries (libc_r, libkse, and libthr). | |
799 | ||
800 | FreeBSD 7.0 switched the default threading library from from libkse | |
801 | to libpthread and removed libc_r. | |
802 | ||
803 | FreeBSD 8.0 removed libkse and the in-kernel support for it. The | |
804 | only threading library supported by 8.0 and later is libthr which | |
805 | ties each user thread directly to an LWP. To simplify the | |
806 | implementation, this target only supports LWP-backed threads using | |
807 | ptrace directly rather than libthread_db. | |
808 | ||
809 | FreeBSD 11.0 introduced LWP event reporting via PT_LWP_EVENTS. | |
810 | */ | |
811 | ||
812 | /* Return true if PTID is still active in the inferior. */ | |
813 | ||
814 | static int | |
815 | fbsd_thread_alive (struct target_ops *ops, ptid_t ptid) | |
816 | { | |
817 | if (ptid_lwp_p (ptid)) | |
818 | { | |
819 | struct ptrace_lwpinfo pl; | |
820 | ||
821 | if (ptrace (PT_LWPINFO, ptid_get_lwp (ptid), (caddr_t) &pl, sizeof pl) | |
822 | == -1) | |
823 | return 0; | |
824 | #ifdef PL_FLAG_EXITED | |
825 | if (pl.pl_flags & PL_FLAG_EXITED) | |
826 | return 0; | |
827 | #endif | |
828 | } | |
829 | ||
830 | return 1; | |
831 | } | |
832 | ||
833 | /* Convert PTID to a string. Returns the string in a static | |
834 | buffer. */ | |
835 | ||
7a114964 | 836 | static const char * |
6e9567fe JB |
837 | fbsd_pid_to_str (struct target_ops *ops, ptid_t ptid) |
838 | { | |
839 | lwpid_t lwp; | |
840 | ||
841 | lwp = ptid_get_lwp (ptid); | |
842 | if (lwp != 0) | |
843 | { | |
844 | static char buf[64]; | |
845 | int pid = ptid_get_pid (ptid); | |
846 | ||
b2bae2f7 | 847 | xsnprintf (buf, sizeof buf, "LWP %d of process %d", lwp, pid); |
6e9567fe JB |
848 | return buf; |
849 | } | |
850 | ||
851 | return normal_pid_to_str (ptid); | |
852 | } | |
853 | ||
854 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
855 | /* Return the name assigned to a thread by an application. Returns | |
856 | the string in a static buffer. */ | |
857 | ||
858 | static const char * | |
859 | fbsd_thread_name (struct target_ops *self, struct thread_info *thr) | |
860 | { | |
861 | struct ptrace_lwpinfo pl; | |
862 | struct kinfo_proc kp; | |
863 | int pid = ptid_get_pid (thr->ptid); | |
864 | long lwp = ptid_get_lwp (thr->ptid); | |
865 | static char buf[sizeof pl.pl_tdname + 1]; | |
866 | ||
867 | /* Note that ptrace_lwpinfo returns the process command in pl_tdname | |
868 | if a name has not been set explicitly. Return a NULL name in | |
869 | that case. */ | |
92fce24d JB |
870 | if (!fbsd_fetch_kinfo_proc (pid, &kp)) |
871 | perror_with_name (_("Failed to fetch process information")); | |
6e9567fe JB |
872 | if (ptrace (PT_LWPINFO, lwp, (caddr_t) &pl, sizeof pl) == -1) |
873 | perror_with_name (("ptrace")); | |
874 | if (strcmp (kp.ki_comm, pl.pl_tdname) == 0) | |
875 | return NULL; | |
876 | xsnprintf (buf, sizeof buf, "%s", pl.pl_tdname); | |
877 | return buf; | |
878 | } | |
879 | #endif | |
880 | ||
da95a26c | 881 | /* Enable additional event reporting on new processes. |
6e9567fe | 882 | |
da95a26c JB |
883 | To catch fork events, PTRACE_FORK is set on every traced process |
884 | to enable stops on returns from fork or vfork. Note that both the | |
885 | parent and child will always stop, even if system call stops are | |
886 | not enabled. | |
887 | ||
888 | To catch LWP events, PTRACE_EVENTS is set on every traced process. | |
6e9567fe JB |
889 | This enables stops on the birth for new LWPs (excluding the "main" LWP) |
890 | and the death of LWPs (excluding the last LWP in a process). Note | |
891 | that unlike fork events, the LWP that creates a new LWP does not | |
892 | report an event. */ | |
893 | ||
894 | static void | |
da95a26c | 895 | fbsd_enable_proc_events (pid_t pid) |
6e9567fe | 896 | { |
da95a26c JB |
897 | #ifdef PT_GET_EVENT_MASK |
898 | int events; | |
899 | ||
900 | if (ptrace (PT_GET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, | |
901 | sizeof (events)) == -1) | |
902 | perror_with_name (("ptrace")); | |
903 | events |= PTRACE_FORK | PTRACE_LWP; | |
dbaed385 JB |
904 | #ifdef PTRACE_VFORK |
905 | events |= PTRACE_VFORK; | |
906 | #endif | |
da95a26c JB |
907 | if (ptrace (PT_SET_EVENT_MASK, pid, (PTRACE_TYPE_ARG3)&events, |
908 | sizeof (events)) == -1) | |
909 | perror_with_name (("ptrace")); | |
910 | #else | |
911 | #ifdef TDP_RFPPWAIT | |
912 | if (ptrace (PT_FOLLOW_FORK, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) | |
913 | perror_with_name (("ptrace")); | |
914 | #endif | |
915 | #ifdef PT_LWP_EVENTS | |
6e9567fe JB |
916 | if (ptrace (PT_LWP_EVENTS, pid, (PTRACE_TYPE_ARG3)0, 1) == -1) |
917 | perror_with_name (("ptrace")); | |
6e9567fe | 918 | #endif |
da95a26c JB |
919 | #endif |
920 | } | |
6e9567fe JB |
921 | |
922 | /* Add threads for any new LWPs in a process. | |
923 | ||
924 | When LWP events are used, this function is only used to detect existing | |
925 | threads when attaching to a process. On older systems, this function is | |
926 | called to discover new threads each time the thread list is updated. */ | |
927 | ||
928 | static void | |
929 | fbsd_add_threads (pid_t pid) | |
930 | { | |
6e9567fe JB |
931 | int i, nlwps; |
932 | ||
933 | gdb_assert (!in_thread_list (pid_to_ptid (pid))); | |
934 | nlwps = ptrace (PT_GETNUMLWPS, pid, NULL, 0); | |
935 | if (nlwps == -1) | |
936 | perror_with_name (("ptrace")); | |
937 | ||
329d5e7e | 938 | gdb::unique_xmalloc_ptr<lwpid_t[]> lwps (XCNEWVEC (lwpid_t, nlwps)); |
6e9567fe | 939 | |
e4a26669 | 940 | nlwps = ptrace (PT_GETLWPLIST, pid, (caddr_t) lwps.get (), nlwps); |
6e9567fe JB |
941 | if (nlwps == -1) |
942 | perror_with_name (("ptrace")); | |
943 | ||
944 | for (i = 0; i < nlwps; i++) | |
945 | { | |
329d5e7e | 946 | ptid_t ptid = ptid_build (pid, lwps[i], 0); |
6e9567fe JB |
947 | |
948 | if (!in_thread_list (ptid)) | |
949 | { | |
950 | #ifdef PT_LWP_EVENTS | |
951 | struct ptrace_lwpinfo pl; | |
952 | ||
953 | /* Don't add exited threads. Note that this is only called | |
954 | when attaching to a multi-threaded process. */ | |
329d5e7e | 955 | if (ptrace (PT_LWPINFO, lwps[i], (caddr_t) &pl, sizeof pl) == -1) |
6e9567fe JB |
956 | perror_with_name (("ptrace")); |
957 | if (pl.pl_flags & PL_FLAG_EXITED) | |
958 | continue; | |
959 | #endif | |
960 | if (debug_fbsd_lwp) | |
961 | fprintf_unfiltered (gdb_stdlog, | |
962 | "FLWP: adding thread for LWP %u\n", | |
329d5e7e | 963 | lwps[i]); |
6e9567fe JB |
964 | add_thread (ptid); |
965 | } | |
966 | } | |
6e9567fe JB |
967 | } |
968 | ||
969 | /* Implement the "to_update_thread_list" target_ops method. */ | |
970 | ||
971 | static void | |
972 | fbsd_update_thread_list (struct target_ops *ops) | |
973 | { | |
974 | #ifdef PT_LWP_EVENTS | |
975 | /* With support for thread events, threads are added/deleted from the | |
976 | list as events are reported, so just try deleting exited threads. */ | |
977 | delete_exited_threads (); | |
978 | #else | |
979 | prune_threads (); | |
980 | ||
981 | fbsd_add_threads (ptid_get_pid (inferior_ptid)); | |
982 | #endif | |
983 | } | |
984 | ||
e58e05d6 JB |
985 | #ifdef TDP_RFPPWAIT |
986 | /* | |
987 | To catch fork events, PT_FOLLOW_FORK is set on every traced process | |
988 | to enable stops on returns from fork or vfork. Note that both the | |
989 | parent and child will always stop, even if system call stops are not | |
990 | enabled. | |
991 | ||
992 | After a fork, both the child and parent process will stop and report | |
993 | an event. However, there is no guarantee of order. If the parent | |
994 | reports its stop first, then fbsd_wait explicitly waits for the new | |
995 | child before returning. If the child reports its stop first, then | |
996 | the event is saved on a list and ignored until the parent's stop is | |
997 | reported. fbsd_wait could have been changed to fetch the parent PID | |
998 | of the new child and used that to wait for the parent explicitly. | |
999 | However, if two threads in the parent fork at the same time, then | |
1000 | the wait on the parent might return the "wrong" fork event. | |
1001 | ||
1002 | The initial version of PT_FOLLOW_FORK did not set PL_FLAG_CHILD for | |
1003 | the new child process. This flag could be inferred by treating any | |
1004 | events for an unknown pid as a new child. | |
1005 | ||
1006 | In addition, the initial version of PT_FOLLOW_FORK did not report a | |
1007 | stop event for the parent process of a vfork until after the child | |
1008 | process executed a new program or exited. The kernel was changed to | |
1009 | defer the wait for exit or exec of the child until after posting the | |
1010 | stop event shortly after the change to introduce PL_FLAG_CHILD. | |
1011 | This could be worked around by reporting a vfork event when the | |
1012 | child event posted and ignoring the subsequent event from the | |
1013 | parent. | |
1014 | ||
1015 | This implementation requires both of these fixes for simplicity's | |
1016 | sake. FreeBSD versions newer than 9.1 contain both fixes. | |
1017 | */ | |
1018 | ||
e8c6b620 | 1019 | static std::list<ptid_t> fbsd_pending_children; |
e58e05d6 JB |
1020 | |
1021 | /* Record a new child process event that is reported before the | |
1022 | corresponding fork event in the parent. */ | |
1023 | ||
1024 | static void | |
6e9567fe | 1025 | fbsd_remember_child (ptid_t pid) |
e58e05d6 | 1026 | { |
e8c6b620 | 1027 | fbsd_pending_children.push_front (pid); |
e58e05d6 JB |
1028 | } |
1029 | ||
1030 | /* Check for a previously-recorded new child process event for PID. | |
6e9567fe | 1031 | If one is found, remove it from the list and return the PTID. */ |
e58e05d6 | 1032 | |
6e9567fe | 1033 | static ptid_t |
e58e05d6 JB |
1034 | fbsd_is_child_pending (pid_t pid) |
1035 | { | |
e8c6b620 JB |
1036 | for (auto it = fbsd_pending_children.begin (); |
1037 | it != fbsd_pending_children.end (); it++) | |
1038 | if (it->pid () == pid) | |
1039 | { | |
1040 | ptid_t ptid = *it; | |
1041 | fbsd_pending_children.erase (it); | |
1042 | return ptid; | |
1043 | } | |
6e9567fe | 1044 | return null_ptid; |
e58e05d6 | 1045 | } |
2c5c2a33 | 1046 | |
dbaed385 | 1047 | #ifndef PTRACE_VFORK |
e8c6b620 | 1048 | static std::forward_list<ptid_t> fbsd_pending_vfork_done; |
2c5c2a33 JB |
1049 | |
1050 | /* Record a pending vfork done event. */ | |
1051 | ||
1052 | static void | |
1053 | fbsd_add_vfork_done (ptid_t pid) | |
1054 | { | |
e8c6b620 | 1055 | fbsd_pending_vfork_done.push_front (pid); |
2c5c2a33 JB |
1056 | } |
1057 | ||
1058 | /* Check for a pending vfork done event for a specific PID. */ | |
1059 | ||
1060 | static int | |
1061 | fbsd_is_vfork_done_pending (pid_t pid) | |
1062 | { | |
e8c6b620 JB |
1063 | for (auto it = fbsd_pending_vfork_done.begin (); |
1064 | it != fbsd_pending_vfork_done.end (); it++) | |
1065 | if (it->pid () == pid) | |
1066 | return 1; | |
2c5c2a33 JB |
1067 | return 0; |
1068 | } | |
1069 | ||
1070 | /* Check for a pending vfork done event. If one is found, remove it | |
1071 | from the list and return the PTID. */ | |
1072 | ||
ee950322 | 1073 | static ptid_t |
2c5c2a33 JB |
1074 | fbsd_next_vfork_done (void) |
1075 | { | |
e8c6b620 | 1076 | if (!fbsd_pending_vfork_done.empty ()) |
2c5c2a33 | 1077 | { |
e8c6b620 JB |
1078 | ptid_t ptid = fbsd_pending_vfork_done.front (); |
1079 | fbsd_pending_vfork_done.pop_front (); | |
2c5c2a33 JB |
1080 | return ptid; |
1081 | } | |
1082 | return null_ptid; | |
1083 | } | |
e58e05d6 | 1084 | #endif |
dbaed385 | 1085 | #endif |
e58e05d6 | 1086 | |
8607ea63 JB |
1087 | /* Implement the "to_resume" target_ops method. */ |
1088 | ||
1089 | static void | |
1090 | fbsd_resume (struct target_ops *ops, | |
1091 | ptid_t ptid, int step, enum gdb_signal signo) | |
1092 | { | |
dbaed385 | 1093 | #if defined(TDP_RFPPWAIT) && !defined(PTRACE_VFORK) |
2c5c2a33 JB |
1094 | pid_t pid; |
1095 | ||
1096 | /* Don't PT_CONTINUE a process which has a pending vfork done event. */ | |
1097 | if (ptid_equal (minus_one_ptid, ptid)) | |
1098 | pid = ptid_get_pid (inferior_ptid); | |
1099 | else | |
1100 | pid = ptid_get_pid (ptid); | |
1101 | if (fbsd_is_vfork_done_pending (pid)) | |
1102 | return; | |
1103 | #endif | |
8607ea63 JB |
1104 | |
1105 | if (debug_fbsd_lwp) | |
1106 | fprintf_unfiltered (gdb_stdlog, | |
1107 | "FLWP: fbsd_resume for ptid (%d, %ld, %ld)\n", | |
1108 | ptid_get_pid (ptid), ptid_get_lwp (ptid), | |
1109 | ptid_get_tid (ptid)); | |
1110 | if (ptid_lwp_p (ptid)) | |
1111 | { | |
1112 | /* If ptid is a specific LWP, suspend all other LWPs in the process. */ | |
d56060f0 JB |
1113 | struct thread_info *tp; |
1114 | int request; | |
1115 | ||
1116 | ALL_NON_EXITED_THREADS (tp) | |
1117 | { | |
1118 | if (ptid_get_pid (tp->ptid) != ptid_get_pid (ptid)) | |
1119 | continue; | |
1120 | ||
1121 | if (ptid_get_lwp (tp->ptid) == ptid_get_lwp (ptid)) | |
1122 | request = PT_RESUME; | |
1123 | else | |
1124 | request = PT_SUSPEND; | |
1125 | ||
1126 | if (ptrace (request, ptid_get_lwp (tp->ptid), NULL, 0) == -1) | |
1127 | perror_with_name (("ptrace")); | |
1128 | } | |
8607ea63 JB |
1129 | } |
1130 | else | |
1131 | { | |
1132 | /* If ptid is a wildcard, resume all matching threads (they won't run | |
1133 | until the process is continued however). */ | |
d56060f0 JB |
1134 | struct thread_info *tp; |
1135 | ||
1136 | ALL_NON_EXITED_THREADS (tp) | |
1137 | { | |
1138 | if (!ptid_match (tp->ptid, ptid)) | |
1139 | continue; | |
1140 | ||
1141 | if (ptrace (PT_RESUME, ptid_get_lwp (tp->ptid), NULL, 0) == -1) | |
1142 | perror_with_name (("ptrace")); | |
1143 | } | |
8607ea63 JB |
1144 | ptid = inferior_ptid; |
1145 | } | |
1146 | super_resume (ops, ptid, step, signo); | |
1147 | } | |
1148 | ||
e58e05d6 JB |
1149 | /* Wait for the child specified by PTID to do something. Return the |
1150 | process ID of the child, or MINUS_ONE_PTID in case of error; store | |
1151 | the status in *OURSTATUS. */ | |
1152 | ||
1153 | static ptid_t | |
1154 | fbsd_wait (struct target_ops *ops, | |
1155 | ptid_t ptid, struct target_waitstatus *ourstatus, | |
1156 | int target_options) | |
1157 | { | |
1158 | ptid_t wptid; | |
1159 | ||
1160 | while (1) | |
1161 | { | |
dbaed385 | 1162 | #ifndef PTRACE_VFORK |
2c5c2a33 JB |
1163 | wptid = fbsd_next_vfork_done (); |
1164 | if (!ptid_equal (wptid, null_ptid)) | |
1165 | { | |
1166 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1167 | return wptid; | |
1168 | } | |
dbaed385 | 1169 | #endif |
e58e05d6 JB |
1170 | wptid = super_wait (ops, ptid, ourstatus, target_options); |
1171 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED) | |
1172 | { | |
1173 | struct ptrace_lwpinfo pl; | |
1174 | pid_t pid; | |
1175 | int status; | |
1176 | ||
1177 | pid = ptid_get_pid (wptid); | |
6e9567fe | 1178 | if (ptrace (PT_LWPINFO, pid, (caddr_t) &pl, sizeof pl) == -1) |
e58e05d6 JB |
1179 | perror_with_name (("ptrace")); |
1180 | ||
6e9567fe JB |
1181 | wptid = ptid_build (pid, pl.pl_lwpid, 0); |
1182 | ||
1183 | #ifdef PT_LWP_EVENTS | |
1184 | if (pl.pl_flags & PL_FLAG_EXITED) | |
1185 | { | |
1186 | /* If GDB attaches to a multi-threaded process, exiting | |
1187 | threads might be skipped during fbsd_post_attach that | |
1188 | have not yet reported their PL_FLAG_EXITED event. | |
1189 | Ignore EXITED events for an unknown LWP. */ | |
1190 | if (in_thread_list (wptid)) | |
1191 | { | |
1192 | if (debug_fbsd_lwp) | |
1193 | fprintf_unfiltered (gdb_stdlog, | |
1194 | "FLWP: deleting thread for LWP %u\n", | |
1195 | pl.pl_lwpid); | |
1196 | if (print_thread_events) | |
1197 | printf_unfiltered (_("[%s exited]\n"), target_pid_to_str | |
1198 | (wptid)); | |
1199 | delete_thread (wptid); | |
1200 | } | |
1201 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1202 | perror_with_name (("ptrace")); | |
1203 | continue; | |
1204 | } | |
1205 | #endif | |
1206 | ||
1207 | /* Switch to an LWP PTID on the first stop in a new process. | |
1208 | This is done after handling PL_FLAG_EXITED to avoid | |
1209 | switching to an exited LWP. It is done before checking | |
1210 | PL_FLAG_BORN in case the first stop reported after | |
1211 | attaching to an existing process is a PL_FLAG_BORN | |
1212 | event. */ | |
1213 | if (in_thread_list (pid_to_ptid (pid))) | |
1214 | { | |
1215 | if (debug_fbsd_lwp) | |
1216 | fprintf_unfiltered (gdb_stdlog, | |
1217 | "FLWP: using LWP %u for first thread\n", | |
1218 | pl.pl_lwpid); | |
1219 | thread_change_ptid (pid_to_ptid (pid), wptid); | |
1220 | } | |
1221 | ||
1222 | #ifdef PT_LWP_EVENTS | |
1223 | if (pl.pl_flags & PL_FLAG_BORN) | |
1224 | { | |
1225 | /* If GDB attaches to a multi-threaded process, newborn | |
1226 | threads might be added by fbsd_add_threads that have | |
1227 | not yet reported their PL_FLAG_BORN event. Ignore | |
1228 | BORN events for an already-known LWP. */ | |
1229 | if (!in_thread_list (wptid)) | |
1230 | { | |
1231 | if (debug_fbsd_lwp) | |
1232 | fprintf_unfiltered (gdb_stdlog, | |
1233 | "FLWP: adding thread for LWP %u\n", | |
1234 | pl.pl_lwpid); | |
1235 | add_thread (wptid); | |
1236 | } | |
1237 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
1238 | return wptid; | |
1239 | } | |
1240 | #endif | |
1241 | ||
e58e05d6 JB |
1242 | #ifdef TDP_RFPPWAIT |
1243 | if (pl.pl_flags & PL_FLAG_FORKED) | |
1244 | { | |
dbaed385 | 1245 | #ifndef PTRACE_VFORK |
e58e05d6 | 1246 | struct kinfo_proc kp; |
dbaed385 | 1247 | #endif |
6e9567fe | 1248 | ptid_t child_ptid; |
e58e05d6 JB |
1249 | pid_t child; |
1250 | ||
1251 | child = pl.pl_child_pid; | |
1252 | ourstatus->kind = TARGET_WAITKIND_FORKED; | |
dbaed385 JB |
1253 | #ifdef PTRACE_VFORK |
1254 | if (pl.pl_flags & PL_FLAG_VFORKED) | |
1255 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1256 | #endif | |
e58e05d6 JB |
1257 | |
1258 | /* Make sure the other end of the fork is stopped too. */ | |
6e9567fe JB |
1259 | child_ptid = fbsd_is_child_pending (child); |
1260 | if (ptid_equal (child_ptid, null_ptid)) | |
e58e05d6 JB |
1261 | { |
1262 | pid = waitpid (child, &status, 0); | |
1263 | if (pid == -1) | |
1264 | perror_with_name (("waitpid")); | |
1265 | ||
1266 | gdb_assert (pid == child); | |
1267 | ||
1268 | if (ptrace (PT_LWPINFO, child, (caddr_t)&pl, sizeof pl) == -1) | |
1269 | perror_with_name (("ptrace")); | |
1270 | ||
1271 | gdb_assert (pl.pl_flags & PL_FLAG_CHILD); | |
6e9567fe | 1272 | child_ptid = ptid_build (child, pl.pl_lwpid, 0); |
e58e05d6 JB |
1273 | } |
1274 | ||
5fa14c6b JB |
1275 | /* Enable additional events on the child process. */ |
1276 | fbsd_enable_proc_events (ptid_get_pid (child_ptid)); | |
1277 | ||
dbaed385 | 1278 | #ifndef PTRACE_VFORK |
e58e05d6 JB |
1279 | /* For vfork, the child process will have the P_PPWAIT |
1280 | flag set. */ | |
92fce24d JB |
1281 | if (fbsd_fetch_kinfo_proc (child, &kp)) |
1282 | { | |
1283 | if (kp.ki_flag & P_PPWAIT) | |
1284 | ourstatus->kind = TARGET_WAITKIND_VFORKED; | |
1285 | } | |
1286 | else | |
1287 | warning (_("Failed to fetch process information")); | |
dbaed385 | 1288 | #endif |
6e9567fe | 1289 | ourstatus->value.related_pid = child_ptid; |
e58e05d6 JB |
1290 | |
1291 | return wptid; | |
1292 | } | |
1293 | ||
1294 | if (pl.pl_flags & PL_FLAG_CHILD) | |
1295 | { | |
1296 | /* Remember that this child forked, but do not report it | |
1297 | until the parent reports its corresponding fork | |
1298 | event. */ | |
6e9567fe | 1299 | fbsd_remember_child (wptid); |
e58e05d6 JB |
1300 | continue; |
1301 | } | |
dbaed385 JB |
1302 | |
1303 | #ifdef PTRACE_VFORK | |
1304 | if (pl.pl_flags & PL_FLAG_VFORK_DONE) | |
1305 | { | |
1306 | ourstatus->kind = TARGET_WAITKIND_VFORK_DONE; | |
1307 | return wptid; | |
1308 | } | |
1309 | #endif | |
e58e05d6 | 1310 | #endif |
d2b41ca0 JB |
1311 | |
1312 | #ifdef PL_FLAG_EXEC | |
1313 | if (pl.pl_flags & PL_FLAG_EXEC) | |
1314 | { | |
1315 | ourstatus->kind = TARGET_WAITKIND_EXECD; | |
1316 | ourstatus->value.execd_pathname | |
1317 | = xstrdup (fbsd_pid_to_exec_file (NULL, pid)); | |
1318 | return wptid; | |
1319 | } | |
1320 | #endif | |
e6cdd38e JB |
1321 | |
1322 | /* Note that PL_FLAG_SCE is set for any event reported while | |
1323 | a thread is executing a system call in the kernel. In | |
1324 | particular, signals that interrupt a sleep in a system | |
1325 | call will report this flag as part of their event. Stops | |
1326 | explicitly for system call entry and exit always use | |
1327 | SIGTRAP, so only treat SIGTRAP events as system call | |
1328 | entry/exit events. */ | |
1329 | if (pl.pl_flags & (PL_FLAG_SCE | PL_FLAG_SCX) | |
1330 | && ourstatus->value.sig == SIGTRAP) | |
1331 | { | |
1332 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1333 | if (catch_syscall_enabled ()) | |
1334 | { | |
1335 | if (catching_syscall_number (pl.pl_syscall_code)) | |
1336 | { | |
1337 | if (pl.pl_flags & PL_FLAG_SCE) | |
1338 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_ENTRY; | |
1339 | else | |
1340 | ourstatus->kind = TARGET_WAITKIND_SYSCALL_RETURN; | |
1341 | ourstatus->value.syscall_number = pl.pl_syscall_code; | |
1342 | return wptid; | |
1343 | } | |
1344 | } | |
1345 | #endif | |
1346 | /* If the core isn't interested in this event, just | |
1347 | continue the process explicitly and wait for another | |
1348 | event. Note that PT_SYSCALL is "sticky" on FreeBSD | |
1349 | and once system call stops are enabled on a process | |
1350 | it stops for all system call entries and exits. */ | |
1351 | if (ptrace (PT_CONTINUE, pid, (caddr_t) 1, 0) == -1) | |
1352 | perror_with_name (("ptrace")); | |
1353 | continue; | |
1354 | } | |
e58e05d6 JB |
1355 | } |
1356 | return wptid; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | #ifdef TDP_RFPPWAIT | |
1361 | /* Target hook for follow_fork. On entry and at return inferior_ptid is | |
1362 | the ptid of the followed inferior. */ | |
1363 | ||
1364 | static int | |
1365 | fbsd_follow_fork (struct target_ops *ops, int follow_child, | |
1366 | int detach_fork) | |
1367 | { | |
bb2a62e6 | 1368 | if (!follow_child && detach_fork) |
e58e05d6 JB |
1369 | { |
1370 | struct thread_info *tp = inferior_thread (); | |
1371 | pid_t child_pid = ptid_get_pid (tp->pending_follow.value.related_pid); | |
1372 | ||
1373 | /* Breakpoints have already been detached from the child by | |
1374 | infrun.c. */ | |
1375 | ||
1376 | if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1) | |
1377 | perror_with_name (("ptrace")); | |
2c5c2a33 | 1378 | |
dbaed385 JB |
1379 | #ifndef PTRACE_VFORK |
1380 | if (tp->pending_follow.kind == TARGET_WAITKIND_VFORKED) | |
2c5c2a33 JB |
1381 | { |
1382 | /* We can't insert breakpoints until the child process has | |
1383 | finished with the shared memory region. The parent | |
1384 | process doesn't wait for the child process to exit or | |
1385 | exec until after it has been resumed from the ptrace stop | |
1386 | to report the fork. Once it has been resumed it doesn't | |
1387 | stop again before returning to userland, so there is no | |
1388 | reliable way to wait on the parent. | |
1389 | ||
1390 | We can't stay attached to the child to wait for an exec | |
1391 | or exit because it may invoke ptrace(PT_TRACE_ME) | |
1392 | (e.g. if the parent process is a debugger forking a new | |
1393 | child process). | |
1394 | ||
1395 | In the end, the best we can do is to make sure it runs | |
1396 | for a little while. Hopefully it will be out of range of | |
1397 | any breakpoints we reinsert. Usually this is only the | |
1398 | single-step breakpoint at vfork's return point. */ | |
1399 | ||
1400 | usleep (10000); | |
1401 | ||
1402 | /* Schedule a fake VFORK_DONE event to report on the next | |
1403 | wait. */ | |
1404 | fbsd_add_vfork_done (inferior_ptid); | |
1405 | } | |
dbaed385 | 1406 | #endif |
e58e05d6 JB |
1407 | } |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | static int | |
1413 | fbsd_insert_fork_catchpoint (struct target_ops *self, int pid) | |
1414 | { | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | static int | |
1419 | fbsd_remove_fork_catchpoint (struct target_ops *self, int pid) | |
1420 | { | |
1421 | return 0; | |
1422 | } | |
1423 | ||
1424 | static int | |
1425 | fbsd_insert_vfork_catchpoint (struct target_ops *self, int pid) | |
1426 | { | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static int | |
1431 | fbsd_remove_vfork_catchpoint (struct target_ops *self, int pid) | |
1432 | { | |
1433 | return 0; | |
1434 | } | |
6e9567fe | 1435 | #endif |
e58e05d6 JB |
1436 | |
1437 | /* Implement the "to_post_startup_inferior" target_ops method. */ | |
1438 | ||
1439 | static void | |
1440 | fbsd_post_startup_inferior (struct target_ops *self, ptid_t pid) | |
1441 | { | |
da95a26c | 1442 | fbsd_enable_proc_events (ptid_get_pid (pid)); |
e58e05d6 JB |
1443 | } |
1444 | ||
1445 | /* Implement the "to_post_attach" target_ops method. */ | |
1446 | ||
1447 | static void | |
1448 | fbsd_post_attach (struct target_ops *self, int pid) | |
1449 | { | |
da95a26c | 1450 | fbsd_enable_proc_events (pid); |
6e9567fe JB |
1451 | fbsd_add_threads (pid); |
1452 | } | |
d2b41ca0 JB |
1453 | |
1454 | #ifdef PL_FLAG_EXEC | |
1455 | /* If the FreeBSD kernel supports PL_FLAG_EXEC, then traced processes | |
1456 | will always stop after exec. */ | |
1457 | ||
1458 | static int | |
1459 | fbsd_insert_exec_catchpoint (struct target_ops *self, int pid) | |
1460 | { | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | static int | |
1465 | fbsd_remove_exec_catchpoint (struct target_ops *self, int pid) | |
1466 | { | |
1467 | return 0; | |
1468 | } | |
1469 | #endif | |
e6cdd38e JB |
1470 | |
1471 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE | |
1472 | static int | |
649a140c PA |
1473 | fbsd_set_syscall_catchpoint (struct target_ops *self, int pid, bool needed, |
1474 | int any_count, | |
1475 | gdb::array_view<const int> syscall_counts) | |
e6cdd38e JB |
1476 | { |
1477 | ||
1478 | /* Ignore the arguments. inf-ptrace.c will use PT_SYSCALL which | |
1479 | will catch all system call entries and exits. The system calls | |
1480 | are filtered by GDB rather than the kernel. */ | |
1481 | return 0; | |
1482 | } | |
1483 | #endif | |
e58e05d6 JB |
1484 | #endif |
1485 | ||
8f60fe01 JB |
1486 | void |
1487 | fbsd_nat_add_target (struct target_ops *t) | |
1488 | { | |
1489 | t->to_pid_to_exec_file = fbsd_pid_to_exec_file; | |
1490 | t->to_find_memory_regions = fbsd_find_memory_regions; | |
92fce24d | 1491 | t->to_info_proc = fbsd_info_proc; |
7697fc9e JB |
1492 | #ifdef KERN_PROC_AUXV |
1493 | super_xfer_partial = t->to_xfer_partial; | |
1494 | t->to_xfer_partial = fbsd_xfer_partial; | |
1495 | #endif | |
e58e05d6 | 1496 | #ifdef PT_LWPINFO |
6e9567fe JB |
1497 | t->to_thread_alive = fbsd_thread_alive; |
1498 | t->to_pid_to_str = fbsd_pid_to_str; | |
1499 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME | |
1500 | t->to_thread_name = fbsd_thread_name; | |
1501 | #endif | |
1502 | t->to_update_thread_list = fbsd_update_thread_list; | |
1503 | t->to_has_thread_control = tc_schedlock; | |
1504 | super_resume = t->to_resume; | |
1505 | t->to_resume = fbsd_resume; | |
e58e05d6 JB |
1506 | super_wait = t->to_wait; |
1507 | t->to_wait = fbsd_wait; | |
6e9567fe JB |
1508 | t->to_post_startup_inferior = fbsd_post_startup_inferior; |
1509 | t->to_post_attach = fbsd_post_attach; | |
e58e05d6 JB |
1510 | #ifdef TDP_RFPPWAIT |
1511 | t->to_follow_fork = fbsd_follow_fork; | |
1512 | t->to_insert_fork_catchpoint = fbsd_insert_fork_catchpoint; | |
1513 | t->to_remove_fork_catchpoint = fbsd_remove_fork_catchpoint; | |
1514 | t->to_insert_vfork_catchpoint = fbsd_insert_vfork_catchpoint; | |
1515 | t->to_remove_vfork_catchpoint = fbsd_remove_vfork_catchpoint; | |
e58e05d6 | 1516 | #endif |
d2b41ca0 JB |
1517 | #ifdef PL_FLAG_EXEC |
1518 | t->to_insert_exec_catchpoint = fbsd_insert_exec_catchpoint; | |
1519 | t->to_remove_exec_catchpoint = fbsd_remove_exec_catchpoint; | |
1520 | #endif | |
e6cdd38e JB |
1521 | #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE |
1522 | t->to_set_syscall_catchpoint = fbsd_set_syscall_catchpoint; | |
1523 | #endif | |
e58e05d6 | 1524 | #endif |
8f60fe01 JB |
1525 | add_target (t); |
1526 | } | |
6e9567fe | 1527 | |
6e9567fe JB |
1528 | void |
1529 | _initialize_fbsd_nat (void) | |
1530 | { | |
1531 | #ifdef PT_LWPINFO | |
1532 | add_setshow_boolean_cmd ("fbsd-lwp", class_maintenance, | |
1533 | &debug_fbsd_lwp, _("\ | |
1534 | Set debugging of FreeBSD lwp module."), _("\ | |
1535 | Show debugging of FreeBSD lwp module."), _("\ | |
1536 | Enables printf debugging output."), | |
1537 | NULL, | |
1538 | &show_fbsd_lwp_debug, | |
1539 | &setdebuglist, &showdebuglist); | |
1540 | #endif | |
1541 | } |