Commit | Line | Data |
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fb0e1ba7 | 1 | /* libthread_db assisted debugging support, generic parts. |
1bac305b | 2 | |
10d6c8cd DJ |
3 | Copyright 1999, 2000, 2001, 2003, 2004, 2005 |
4 | Free Software Foundation, Inc. | |
fb0e1ba7 MK |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
24 | ||
25 | #include "gdb_assert.h" | |
26 | #include <dlfcn.h> | |
27 | #include "gdb_proc_service.h" | |
28 | #include "gdb_thread_db.h" | |
29 | ||
bda9cb72 | 30 | #include "bfd.h" |
93ad78a7 | 31 | #include "exceptions.h" |
fb0e1ba7 MK |
32 | #include "gdbthread.h" |
33 | #include "inferior.h" | |
bda9cb72 MK |
34 | #include "symfile.h" |
35 | #include "objfiles.h" | |
fb0e1ba7 | 36 | #include "target.h" |
4e052eda | 37 | #include "regcache.h" |
3f47be5c | 38 | #include "solib-svr4.h" |
fb0e1ba7 | 39 | |
a2f23071 DJ |
40 | #ifdef HAVE_GNU_LIBC_VERSION_H |
41 | #include <gnu/libc-version.h> | |
42 | #endif | |
43 | ||
fb0e1ba7 MK |
44 | #ifndef LIBTHREAD_DB_SO |
45 | #define LIBTHREAD_DB_SO "libthread_db.so.1" | |
46 | #endif | |
47 | ||
8605d56e AC |
48 | /* If we're running on GNU/Linux, we must explicitly attach to any new |
49 | threads. */ | |
fb0e1ba7 MK |
50 | |
51 | /* FIXME: There is certainly some room for improvements: | |
52 | - Cache LWP ids. | |
53 | - Bypass libthread_db when fetching or storing registers for | |
54 | threads bound to a LWP. */ | |
55 | ||
56 | /* This module's target vector. */ | |
57 | static struct target_ops thread_db_ops; | |
58 | ||
59 | /* The target vector that we call for things this module can't handle. */ | |
60 | static struct target_ops *target_beneath; | |
61 | ||
62 | /* Pointer to the next function on the objfile event chain. */ | |
b4acd559 | 63 | static void (*target_new_objfile_chain) (struct objfile * objfile); |
fb0e1ba7 MK |
64 | |
65 | /* Non-zero if we're using this module's target vector. */ | |
66 | static int using_thread_db; | |
67 | ||
68 | /* Non-zero if we have determined the signals used by the threads | |
69 | library. */ | |
70 | static int thread_signals; | |
71 | static sigset_t thread_stop_set; | |
72 | static sigset_t thread_print_set; | |
73 | ||
74 | /* Structure that identifies the child process for the | |
75 | <proc_service.h> interface. */ | |
76 | static struct ps_prochandle proc_handle; | |
77 | ||
78 | /* Connection to the libthread_db library. */ | |
79 | static td_thragent_t *thread_agent; | |
80 | ||
81 | /* Pointers to the libthread_db functions. */ | |
82 | ||
83 | static td_err_e (*td_init_p) (void); | |
84 | ||
b4acd559 JJ |
85 | static td_err_e (*td_ta_new_p) (struct ps_prochandle * ps, |
86 | td_thragent_t **ta); | |
fb0e1ba7 MK |
87 | static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt, |
88 | td_thrhandle_t *__th); | |
b4acd559 JJ |
89 | static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta, |
90 | lwpid_t lwpid, td_thrhandle_t *th); | |
fb0e1ba7 | 91 | static td_err_e (*td_ta_thr_iter_p) (const td_thragent_t *ta, |
b4acd559 JJ |
92 | td_thr_iter_f *callback, void *cbdata_p, |
93 | td_thr_state_e state, int ti_pri, | |
94 | sigset_t *ti_sigmask_p, | |
fb0e1ba7 MK |
95 | unsigned int ti_user_flags); |
96 | static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta, | |
97 | td_event_e event, td_notify_t *ptr); | |
98 | static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta, | |
99 | td_thr_events_t *event); | |
100 | static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta, | |
101 | td_event_msg_t *msg); | |
102 | ||
103 | static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th); | |
104 | static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th, | |
105 | td_thrinfo_t *infop); | |
106 | static td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th, | |
107 | gdb_prfpregset_t *regset); | |
108 | static td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th, | |
109 | prgregset_t gregs); | |
110 | static td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th, | |
111 | const gdb_prfpregset_t *fpregs); | |
112 | static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th, | |
113 | prgregset_t gregs); | |
b4acd559 JJ |
114 | static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th, |
115 | int event); | |
fb0e1ba7 | 116 | |
3f47be5c | 117 | static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th, |
b4acd559 JJ |
118 | void *map_address, |
119 | size_t offset, void **address); | |
3f47be5c | 120 | |
fb0e1ba7 MK |
121 | /* Location of the thread creation event breakpoint. The code at this |
122 | location in the child process will be called by the pthread library | |
123 | whenever a new thread is created. By setting a special breakpoint | |
124 | at this location, GDB can detect when a new thread is created. We | |
125 | obtain this location via the td_ta_event_addr call. */ | |
126 | static CORE_ADDR td_create_bp_addr; | |
127 | ||
128 | /* Location of the thread death event breakpoint. */ | |
129 | static CORE_ADDR td_death_bp_addr; | |
130 | ||
131 | /* Prototypes for local functions. */ | |
bda9cb72 | 132 | static void thread_db_find_new_threads (void); |
5365276c DJ |
133 | static void attach_thread (ptid_t ptid, const td_thrhandle_t *th_p, |
134 | const td_thrinfo_t *ti_p, int verbose); | |
a2f23071 | 135 | static void detach_thread (ptid_t ptid, int verbose); |
fb0e1ba7 MK |
136 | \f |
137 | ||
138 | /* Building process ids. */ | |
139 | ||
ca6724c1 KB |
140 | #define GET_PID(ptid) ptid_get_pid (ptid) |
141 | #define GET_LWP(ptid) ptid_get_lwp (ptid) | |
142 | #define GET_THREAD(ptid) ptid_get_tid (ptid) | |
fb0e1ba7 | 143 | |
ca6724c1 KB |
144 | #define is_lwp(ptid) (GET_LWP (ptid) != 0) |
145 | #define is_thread(ptid) (GET_THREAD (ptid) != 0) | |
fb0e1ba7 | 146 | |
ca6724c1 | 147 | #define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0) |
fb0e1ba7 MK |
148 | \f |
149 | ||
5365276c DJ |
150 | /* Use "struct private_thread_info" to cache thread state. This is |
151 | a substantial optimization. */ | |
152 | ||
fb0e1ba7 MK |
153 | struct private_thread_info |
154 | { | |
a2f23071 DJ |
155 | /* Flag set when we see a TD_DEATH event for this thread. */ |
156 | unsigned int dying:1; | |
157 | ||
5365276c | 158 | /* Cached thread state. */ |
b4acd559 JJ |
159 | unsigned int th_valid:1; |
160 | unsigned int ti_valid:1; | |
5365276c DJ |
161 | |
162 | td_thrhandle_t th; | |
163 | td_thrinfo_t ti; | |
fb0e1ba7 | 164 | }; |
fb0e1ba7 | 165 | \f |
21bf60fe | 166 | |
fb0e1ba7 MK |
167 | static char * |
168 | thread_db_err_str (td_err_e err) | |
169 | { | |
170 | static char buf[64]; | |
171 | ||
172 | switch (err) | |
173 | { | |
174 | case TD_OK: | |
175 | return "generic 'call succeeded'"; | |
176 | case TD_ERR: | |
177 | return "generic error"; | |
178 | case TD_NOTHR: | |
179 | return "no thread to satisfy query"; | |
180 | case TD_NOSV: | |
181 | return "no sync handle to satisfy query"; | |
182 | case TD_NOLWP: | |
183 | return "no LWP to satisfy query"; | |
184 | case TD_BADPH: | |
185 | return "invalid process handle"; | |
186 | case TD_BADTH: | |
187 | return "invalid thread handle"; | |
188 | case TD_BADSH: | |
189 | return "invalid synchronization handle"; | |
190 | case TD_BADTA: | |
191 | return "invalid thread agent"; | |
192 | case TD_BADKEY: | |
193 | return "invalid key"; | |
194 | case TD_NOMSG: | |
195 | return "no event message for getmsg"; | |
196 | case TD_NOFPREGS: | |
197 | return "FPU register set not available"; | |
198 | case TD_NOLIBTHREAD: | |
199 | return "application not linked with libthread"; | |
200 | case TD_NOEVENT: | |
201 | return "requested event is not supported"; | |
202 | case TD_NOCAPAB: | |
203 | return "capability not available"; | |
204 | case TD_DBERR: | |
205 | return "debugger service failed"; | |
206 | case TD_NOAPLIC: | |
207 | return "operation not applicable to"; | |
208 | case TD_NOTSD: | |
209 | return "no thread-specific data for this thread"; | |
210 | case TD_MALLOC: | |
211 | return "malloc failed"; | |
212 | case TD_PARTIALREG: | |
213 | return "only part of register set was written/read"; | |
214 | case TD_NOXREGS: | |
215 | return "X register set not available for this thread"; | |
216 | default: | |
217 | snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err); | |
218 | return buf; | |
219 | } | |
220 | } | |
221 | ||
222 | static char * | |
223 | thread_db_state_str (td_thr_state_e state) | |
224 | { | |
225 | static char buf[64]; | |
226 | ||
227 | switch (state) | |
228 | { | |
229 | case TD_THR_STOPPED: | |
230 | return "stopped by debugger"; | |
231 | case TD_THR_RUN: | |
232 | return "runnable"; | |
233 | case TD_THR_ACTIVE: | |
234 | return "active"; | |
235 | case TD_THR_ZOMBIE: | |
236 | return "zombie"; | |
237 | case TD_THR_SLEEP: | |
238 | return "sleeping"; | |
239 | case TD_THR_STOPPED_ASLEEP: | |
240 | return "stopped by debugger AND blocked"; | |
241 | default: | |
242 | snprintf (buf, sizeof (buf), "unknown thread_db state %d", state); | |
243 | return buf; | |
244 | } | |
245 | } | |
246 | \f | |
5365276c | 247 | /* A callback function for td_ta_thr_iter, which we use to map all |
cdbc0b18 | 248 | threads to LWPs. |
5365276c DJ |
249 | |
250 | THP is a handle to the current thread; if INFOP is not NULL, the | |
251 | struct thread_info associated with this thread is returned in | |
b9b5d7ea JJ |
252 | *INFOP. |
253 | ||
254 | If the thread is a zombie, TD_THR_ZOMBIE is returned. Otherwise, | |
255 | zero is returned to indicate success. */ | |
5365276c DJ |
256 | |
257 | static int | |
258 | thread_get_info_callback (const td_thrhandle_t *thp, void *infop) | |
259 | { | |
260 | td_thrinfo_t ti; | |
261 | td_err_e err; | |
262 | struct thread_info *thread_info; | |
263 | ptid_t thread_ptid; | |
264 | ||
265 | err = td_thr_get_info_p (thp, &ti); | |
266 | if (err != TD_OK) | |
8a3fe4f8 | 267 | error (_("thread_get_info_callback: cannot get thread info: %s"), |
5365276c DJ |
268 | thread_db_err_str (err)); |
269 | ||
270 | /* Fill the cache. */ | |
1bac0d4d | 271 | thread_ptid = ptid_build (GET_PID (inferior_ptid), ti.ti_lid, ti.ti_tid); |
5365276c DJ |
272 | thread_info = find_thread_pid (thread_ptid); |
273 | ||
b9b5d7ea | 274 | /* In the case of a zombie thread, don't continue. We don't want to |
f90ef764 | 275 | attach to it thinking it is a new thread. */ |
b9b5d7ea JJ |
276 | if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE) |
277 | { | |
278 | if (infop != NULL) | |
279 | *(struct thread_info **) infop = thread_info; | |
f90ef764 JJ |
280 | if (thread_info != NULL) |
281 | { | |
282 | memcpy (&thread_info->private->th, thp, sizeof (*thp)); | |
283 | thread_info->private->th_valid = 1; | |
284 | memcpy (&thread_info->private->ti, &ti, sizeof (ti)); | |
285 | thread_info->private->ti_valid = 1; | |
286 | } | |
b9b5d7ea JJ |
287 | return TD_THR_ZOMBIE; |
288 | } | |
289 | ||
5365276c DJ |
290 | if (thread_info == NULL) |
291 | { | |
292 | /* New thread. Attach to it now (why wait?). */ | |
293 | attach_thread (thread_ptid, thp, &ti, 1); | |
294 | thread_info = find_thread_pid (thread_ptid); | |
295 | gdb_assert (thread_info != NULL); | |
296 | } | |
297 | ||
298 | memcpy (&thread_info->private->th, thp, sizeof (*thp)); | |
299 | thread_info->private->th_valid = 1; | |
300 | memcpy (&thread_info->private->ti, &ti, sizeof (ti)); | |
301 | thread_info->private->ti_valid = 1; | |
302 | ||
303 | if (infop != NULL) | |
304 | *(struct thread_info **) infop = thread_info; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | /* Accessor functions for the thread_db information, with caching. */ | |
fb0e1ba7 | 310 | |
5365276c DJ |
311 | static void |
312 | thread_db_map_id2thr (struct thread_info *thread_info, int fatal) | |
313 | { | |
314 | td_err_e err; | |
315 | ||
316 | if (thread_info->private->th_valid) | |
317 | return; | |
318 | ||
319 | err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid), | |
320 | &thread_info->private->th); | |
321 | if (err != TD_OK) | |
322 | { | |
323 | if (fatal) | |
8a3fe4f8 | 324 | error (_("Cannot find thread %ld: %s"), |
b4acd559 JJ |
325 | (long) GET_THREAD (thread_info->ptid), |
326 | thread_db_err_str (err)); | |
5365276c DJ |
327 | } |
328 | else | |
329 | thread_info->private->th_valid = 1; | |
330 | } | |
331 | ||
332 | static td_thrinfo_t * | |
333 | thread_db_get_info (struct thread_info *thread_info) | |
334 | { | |
335 | td_err_e err; | |
336 | ||
337 | if (thread_info->private->ti_valid) | |
338 | return &thread_info->private->ti; | |
339 | ||
b4acd559 | 340 | if (!thread_info->private->th_valid) |
5365276c DJ |
341 | thread_db_map_id2thr (thread_info, 1); |
342 | ||
b4acd559 JJ |
343 | err = |
344 | td_thr_get_info_p (&thread_info->private->th, &thread_info->private->ti); | |
5365276c | 345 | if (err != TD_OK) |
8a3fe4f8 | 346 | error (_("thread_db_get_info: cannot get thread info: %s"), |
5365276c DJ |
347 | thread_db_err_str (err)); |
348 | ||
349 | thread_info->private->ti_valid = 1; | |
350 | return &thread_info->private->ti; | |
351 | } | |
352 | \f | |
fb0e1ba7 MK |
353 | /* Convert between user-level thread ids and LWP ids. */ |
354 | ||
39f77062 KB |
355 | static ptid_t |
356 | thread_from_lwp (ptid_t ptid) | |
fb0e1ba7 | 357 | { |
fb0e1ba7 MK |
358 | td_thrhandle_t th; |
359 | td_err_e err; | |
5365276c DJ |
360 | struct thread_info *thread_info; |
361 | ptid_t thread_ptid; | |
fb0e1ba7 | 362 | |
39f77062 KB |
363 | if (GET_LWP (ptid) == 0) |
364 | ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid)); | |
fb0e1ba7 | 365 | |
39f77062 | 366 | gdb_assert (is_lwp (ptid)); |
fb0e1ba7 | 367 | |
39f77062 | 368 | err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th); |
fb0e1ba7 | 369 | if (err != TD_OK) |
8a3fe4f8 | 370 | error (_("Cannot find user-level thread for LWP %ld: %s"), |
39f77062 | 371 | GET_LWP (ptid), thread_db_err_str (err)); |
fb0e1ba7 | 372 | |
5365276c | 373 | thread_info = NULL; |
b9b5d7ea JJ |
374 | |
375 | /* Fetch the thread info. If we get back TD_THR_ZOMBIE, then the | |
376 | event thread has already died. If another gdb interface has called | |
377 | thread_alive() previously, the thread won't be found on the thread list | |
378 | anymore. In that case, we don't want to process this ptid anymore | |
379 | to avoid the possibility of later treating it as a newly | |
380 | discovered thread id that we should add to the list. Thus, | |
381 | we return a -1 ptid which is also how the thread list marks a | |
382 | dead thread. */ | |
383 | if (thread_get_info_callback (&th, &thread_info) == TD_THR_ZOMBIE | |
384 | && thread_info == NULL) | |
385 | return pid_to_ptid (-1); | |
386 | ||
5365276c | 387 | gdb_assert (thread_info && thread_info->private->ti_valid); |
fb0e1ba7 | 388 | |
1bac0d4d DJ |
389 | return ptid_build (GET_PID (ptid), GET_LWP (ptid), |
390 | thread_info->private->ti.ti_tid); | |
fb0e1ba7 MK |
391 | } |
392 | ||
39f77062 KB |
393 | static ptid_t |
394 | lwp_from_thread (ptid_t ptid) | |
fb0e1ba7 | 395 | { |
1bac0d4d | 396 | return BUILD_LWP (GET_LWP (ptid), GET_PID (ptid)); |
fb0e1ba7 MK |
397 | } |
398 | \f | |
399 | ||
400 | void | |
401 | thread_db_init (struct target_ops *target) | |
402 | { | |
403 | target_beneath = target; | |
404 | } | |
405 | ||
5220ea4c AC |
406 | static void * |
407 | verbose_dlsym (void *handle, const char *name) | |
408 | { | |
409 | void *sym = dlsym (handle, name); | |
410 | if (sym == NULL) | |
8a3fe4f8 | 411 | warning (_("Symbol \"%s\" not found in libthread_db: %s"), name, dlerror ()); |
5220ea4c AC |
412 | return sym; |
413 | } | |
414 | ||
fb0e1ba7 MK |
415 | static int |
416 | thread_db_load (void) | |
417 | { | |
418 | void *handle; | |
419 | td_err_e err; | |
420 | ||
421 | handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW); | |
422 | if (handle == NULL) | |
f7c1e0f3 | 423 | { |
b4acd559 | 424 | fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n", |
f7c1e0f3 | 425 | LIBTHREAD_DB_SO, dlerror ()); |
b4acd559 | 426 | fprintf_filtered (gdb_stderr, |
f7c1e0f3 MS |
427 | "GDB will not be able to debug pthreads.\n\n"); |
428 | return 0; | |
429 | } | |
fb0e1ba7 MK |
430 | |
431 | /* Initialize pointers to the dynamic library functions we will use. | |
432 | Essential functions first. */ | |
433 | ||
5220ea4c | 434 | td_init_p = verbose_dlsym (handle, "td_init"); |
fb0e1ba7 MK |
435 | if (td_init_p == NULL) |
436 | return 0; | |
437 | ||
5220ea4c | 438 | td_ta_new_p = verbose_dlsym (handle, "td_ta_new"); |
fb0e1ba7 MK |
439 | if (td_ta_new_p == NULL) |
440 | return 0; | |
441 | ||
5220ea4c | 442 | td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr"); |
fb0e1ba7 MK |
443 | if (td_ta_map_id2thr_p == NULL) |
444 | return 0; | |
445 | ||
5220ea4c | 446 | td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr"); |
fb0e1ba7 MK |
447 | if (td_ta_map_lwp2thr_p == NULL) |
448 | return 0; | |
449 | ||
5220ea4c | 450 | td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter"); |
fb0e1ba7 MK |
451 | if (td_ta_thr_iter_p == NULL) |
452 | return 0; | |
453 | ||
5220ea4c | 454 | td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate"); |
fb0e1ba7 MK |
455 | if (td_thr_validate_p == NULL) |
456 | return 0; | |
457 | ||
5220ea4c | 458 | td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info"); |
fb0e1ba7 MK |
459 | if (td_thr_get_info_p == NULL) |
460 | return 0; | |
461 | ||
5220ea4c | 462 | td_thr_getfpregs_p = verbose_dlsym (handle, "td_thr_getfpregs"); |
fb0e1ba7 MK |
463 | if (td_thr_getfpregs_p == NULL) |
464 | return 0; | |
465 | ||
5220ea4c | 466 | td_thr_getgregs_p = verbose_dlsym (handle, "td_thr_getgregs"); |
fb0e1ba7 MK |
467 | if (td_thr_getgregs_p == NULL) |
468 | return 0; | |
469 | ||
5220ea4c | 470 | td_thr_setfpregs_p = verbose_dlsym (handle, "td_thr_setfpregs"); |
fb0e1ba7 MK |
471 | if (td_thr_setfpregs_p == NULL) |
472 | return 0; | |
473 | ||
5220ea4c | 474 | td_thr_setgregs_p = verbose_dlsym (handle, "td_thr_setgregs"); |
fb0e1ba7 MK |
475 | if (td_thr_setgregs_p == NULL) |
476 | return 0; | |
477 | ||
478 | /* Initialize the library. */ | |
479 | err = td_init_p (); | |
480 | if (err != TD_OK) | |
481 | { | |
8a3fe4f8 | 482 | warning (_("Cannot initialize libthread_db: %s"), thread_db_err_str (err)); |
fb0e1ba7 MK |
483 | return 0; |
484 | } | |
485 | ||
486 | /* These are not essential. */ | |
487 | td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr"); | |
488 | td_ta_set_event_p = dlsym (handle, "td_ta_set_event"); | |
489 | td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg"); | |
490 | td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable"); | |
3f47be5c | 491 | td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr"); |
fb0e1ba7 MK |
492 | |
493 | return 1; | |
494 | } | |
495 | ||
cdbc0b18 | 496 | static td_err_e |
24557e30 AC |
497 | enable_thread_event (td_thragent_t *thread_agent, int event, CORE_ADDR *bp) |
498 | { | |
499 | td_notify_t notify; | |
cdbc0b18 | 500 | td_err_e err; |
24557e30 AC |
501 | |
502 | /* Get the breakpoint address for thread EVENT. */ | |
503 | err = td_ta_event_addr_p (thread_agent, event, ¬ify); | |
504 | if (err != TD_OK) | |
cdbc0b18 | 505 | return err; |
24557e30 AC |
506 | |
507 | /* Set up the breakpoint. */ | |
508 | (*bp) = gdbarch_convert_from_func_ptr_addr (current_gdbarch, | |
509 | (CORE_ADDR) notify.u.bptaddr, | |
510 | ¤t_target); | |
511 | create_thread_event_breakpoint ((*bp)); | |
512 | ||
cdbc0b18 | 513 | return TD_OK; |
24557e30 AC |
514 | } |
515 | ||
fb0e1ba7 MK |
516 | static void |
517 | enable_thread_event_reporting (void) | |
518 | { | |
519 | td_thr_events_t events; | |
520 | td_notify_t notify; | |
521 | td_err_e err; | |
a2f23071 DJ |
522 | #ifdef HAVE_GNU_LIBC_VERSION_H |
523 | const char *libc_version; | |
524 | int libc_major, libc_minor; | |
525 | #endif | |
fb0e1ba7 MK |
526 | |
527 | /* We cannot use the thread event reporting facility if these | |
528 | functions aren't available. */ | |
529 | if (td_ta_event_addr_p == NULL || td_ta_set_event_p == NULL | |
530 | || td_ta_event_getmsg_p == NULL || td_thr_event_enable_p == NULL) | |
531 | return; | |
532 | ||
533 | /* Set the process wide mask saying which events we're interested in. */ | |
534 | td_event_emptyset (&events); | |
535 | td_event_addset (&events, TD_CREATE); | |
a2f23071 DJ |
536 | |
537 | #ifdef HAVE_GNU_LIBC_VERSION_H | |
fb0e1ba7 MK |
538 | /* FIXME: kettenis/2000-04-23: The event reporting facility is |
539 | broken for TD_DEATH events in glibc 2.1.3, so don't enable it for | |
540 | now. */ | |
a2f23071 DJ |
541 | libc_version = gnu_get_libc_version (); |
542 | if (sscanf (libc_version, "%d.%d", &libc_major, &libc_minor) == 2 | |
543 | && (libc_major > 2 || (libc_major == 2 && libc_minor > 1))) | |
fb0e1ba7 | 544 | #endif |
a2f23071 | 545 | td_event_addset (&events, TD_DEATH); |
fb0e1ba7 MK |
546 | |
547 | err = td_ta_set_event_p (thread_agent, &events); | |
548 | if (err != TD_OK) | |
549 | { | |
8a3fe4f8 | 550 | warning (_("Unable to set global thread event mask: %s"), |
fb0e1ba7 MK |
551 | thread_db_err_str (err)); |
552 | return; | |
553 | } | |
554 | ||
555 | /* Delete previous thread event breakpoints, if any. */ | |
556 | remove_thread_event_breakpoints (); | |
24557e30 AC |
557 | td_create_bp_addr = 0; |
558 | td_death_bp_addr = 0; | |
fb0e1ba7 | 559 | |
24557e30 | 560 | /* Set up the thread creation event. */ |
cdbc0b18 RM |
561 | err = enable_thread_event (thread_agent, TD_CREATE, &td_create_bp_addr); |
562 | if (err != TD_OK) | |
fb0e1ba7 | 563 | { |
8a3fe4f8 | 564 | warning (_("Unable to get location for thread creation breakpoint: %s"), |
fb0e1ba7 MK |
565 | thread_db_err_str (err)); |
566 | return; | |
567 | } | |
568 | ||
24557e30 | 569 | /* Set up the thread death event. */ |
cdbc0b18 RM |
570 | err = enable_thread_event (thread_agent, TD_DEATH, &td_death_bp_addr); |
571 | if (err != TD_OK) | |
fb0e1ba7 | 572 | { |
8a3fe4f8 | 573 | warning (_("Unable to get location for thread death breakpoint: %s"), |
fb0e1ba7 MK |
574 | thread_db_err_str (err)); |
575 | return; | |
576 | } | |
fb0e1ba7 MK |
577 | } |
578 | ||
579 | static void | |
580 | disable_thread_event_reporting (void) | |
581 | { | |
582 | td_thr_events_t events; | |
583 | ||
584 | /* Set the process wide mask saying we aren't interested in any | |
585 | events anymore. */ | |
586 | td_event_emptyset (&events); | |
587 | td_ta_set_event_p (thread_agent, &events); | |
588 | ||
589 | /* Delete thread event breakpoints, if any. */ | |
590 | remove_thread_event_breakpoints (); | |
591 | td_create_bp_addr = 0; | |
592 | td_death_bp_addr = 0; | |
593 | } | |
594 | ||
595 | static void | |
596 | check_thread_signals (void) | |
597 | { | |
598 | #ifdef GET_THREAD_SIGNALS | |
21bf60fe | 599 | if (!thread_signals) |
fb0e1ba7 MK |
600 | { |
601 | sigset_t mask; | |
602 | int i; | |
603 | ||
604 | GET_THREAD_SIGNALS (&mask); | |
605 | sigemptyset (&thread_stop_set); | |
606 | sigemptyset (&thread_print_set); | |
607 | ||
b9569773 | 608 | for (i = 1; i < NSIG; i++) |
fb0e1ba7 MK |
609 | { |
610 | if (sigismember (&mask, i)) | |
611 | { | |
612 | if (signal_stop_update (target_signal_from_host (i), 0)) | |
613 | sigaddset (&thread_stop_set, i); | |
614 | if (signal_print_update (target_signal_from_host (i), 0)) | |
615 | sigaddset (&thread_print_set, i); | |
616 | thread_signals = 1; | |
617 | } | |
618 | } | |
619 | } | |
620 | #endif | |
621 | } | |
622 | ||
fb0e1ba7 MK |
623 | static void |
624 | thread_db_new_objfile (struct objfile *objfile) | |
625 | { | |
626 | td_err_e err; | |
627 | ||
5220ea4c AC |
628 | /* First time through, report that libthread_db was successfuly |
629 | loaded. Can't print this in in thread_db_load as, at that stage, | |
630 | the interpreter and it's console haven't started. The real | |
631 | problem here is that libthread_db is loaded too early - it should | |
632 | only be loaded when there is a program to debug. */ | |
633 | { | |
634 | static int dejavu; | |
635 | if (!dejavu) | |
636 | { | |
637 | Dl_info info; | |
638 | const char *library = NULL; | |
639 | /* Try dladdr. */ | |
640 | if (dladdr ((*td_ta_new_p), &info) != 0) | |
641 | library = info.dli_fname; | |
642 | /* Try dlinfo? */ | |
643 | if (library == NULL) | |
644 | /* Paranoid - don't let a NULL path slip through. */ | |
645 | library = LIBTHREAD_DB_SO; | |
a3f17187 | 646 | printf_unfiltered (_("Using host libthread_db library \"%s\".\n"), |
5220ea4c AC |
647 | library); |
648 | dejavu = 1; | |
649 | } | |
650 | } | |
651 | ||
5bbd998e MS |
652 | /* Don't attempt to use thread_db on targets which can not run |
653 | (core files). */ | |
654 | if (objfile == NULL || !target_has_execution) | |
bda9cb72 MK |
655 | { |
656 | /* All symbols have been discarded. If the thread_db target is | |
c194fbe1 | 657 | active, deactivate it now. */ |
bda9cb72 | 658 | if (using_thread_db) |
c194fbe1 MK |
659 | { |
660 | gdb_assert (proc_handle.pid == 0); | |
661 | unpush_target (&thread_db_ops); | |
662 | using_thread_db = 0; | |
663 | } | |
664 | ||
bda9cb72 MK |
665 | goto quit; |
666 | } | |
667 | ||
fb0e1ba7 MK |
668 | if (using_thread_db) |
669 | /* Nothing to do. The thread library was already detected and the | |
670 | target vector was already activated. */ | |
671 | goto quit; | |
672 | ||
bda9cb72 MK |
673 | /* Initialize the structure that identifies the child process. Note |
674 | that at this point there is no guarantee that we actually have a | |
675 | child process. */ | |
39f77062 | 676 | proc_handle.pid = GET_PID (inferior_ptid); |
fb0e1ba7 | 677 | |
bda9cb72 | 678 | /* Now attempt to open a connection to the thread library. */ |
fb0e1ba7 MK |
679 | err = td_ta_new_p (&proc_handle, &thread_agent); |
680 | switch (err) | |
681 | { | |
682 | case TD_NOLIBTHREAD: | |
bda9cb72 | 683 | /* No thread library was detected. */ |
fb0e1ba7 MK |
684 | break; |
685 | ||
686 | case TD_OK: | |
a3f17187 | 687 | printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n")); |
5220ea4c | 688 | |
bda9cb72 MK |
689 | /* The thread library was detected. Activate the thread_db target. */ |
690 | push_target (&thread_db_ops); | |
691 | using_thread_db = 1; | |
692 | ||
95575b2e AC |
693 | enable_thread_event_reporting (); |
694 | thread_db_find_new_threads (); | |
fb0e1ba7 MK |
695 | break; |
696 | ||
697 | default: | |
8a3fe4f8 | 698 | warning (_("Cannot initialize thread debugging library: %s"), |
fb0e1ba7 MK |
699 | thread_db_err_str (err)); |
700 | break; | |
701 | } | |
702 | ||
b4acd559 | 703 | quit: |
540af400 MS |
704 | if (target_new_objfile_chain) |
705 | target_new_objfile_chain (objfile); | |
fb0e1ba7 MK |
706 | } |
707 | ||
a2f23071 DJ |
708 | /* Attach to a new thread. This function is called when we receive a |
709 | TD_CREATE event or when we iterate over all threads and find one | |
710 | that wasn't already in our list. */ | |
711 | ||
fb0e1ba7 | 712 | static void |
39f77062 | 713 | attach_thread (ptid_t ptid, const td_thrhandle_t *th_p, |
fb0e1ba7 MK |
714 | const td_thrinfo_t *ti_p, int verbose) |
715 | { | |
716 | struct thread_info *tp; | |
717 | td_err_e err; | |
718 | ||
a2f23071 DJ |
719 | /* If we're being called after a TD_CREATE event, we may already |
720 | know about this thread. There are two ways this can happen. We | |
721 | may have iterated over all threads between the thread creation | |
722 | and the TD_CREATE event, for instance when the user has issued | |
723 | the `info threads' command before the SIGTRAP for hitting the | |
724 | thread creation breakpoint was reported. Alternatively, the | |
725 | thread may have exited and a new one been created with the same | |
726 | thread ID. In the first case we don't need to do anything; in | |
727 | the second case we should discard information about the dead | |
728 | thread and attach to the new one. */ | |
729 | if (in_thread_list (ptid)) | |
730 | { | |
731 | tp = find_thread_pid (ptid); | |
732 | gdb_assert (tp != NULL); | |
733 | ||
734 | if (!tp->private->dying) | |
735 | return; | |
736 | ||
737 | delete_thread (ptid); | |
738 | } | |
739 | ||
fb0e1ba7 MK |
740 | check_thread_signals (); |
741 | ||
fb0e1ba7 | 742 | /* Add the thread to GDB's thread list. */ |
39f77062 | 743 | tp = add_thread (ptid); |
fb0e1ba7 | 744 | tp->private = xmalloc (sizeof (struct private_thread_info)); |
5365276c DJ |
745 | memset (tp->private, 0, sizeof (struct private_thread_info)); |
746 | ||
747 | if (verbose) | |
a3f17187 | 748 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
fb0e1ba7 | 749 | |
21bf60fe MK |
750 | if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE) |
751 | return; /* A zombie thread -- do not attach. */ | |
5fd913cc | 752 | |
8605d56e | 753 | /* Under GNU/Linux, we have to attach to each and every thread. */ |
fb0e1ba7 | 754 | #ifdef ATTACH_LWP |
c194fbe1 | 755 | ATTACH_LWP (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid)), 0); |
fb0e1ba7 MK |
756 | #endif |
757 | ||
758 | /* Enable thread event reporting for this thread. */ | |
759 | err = td_thr_event_enable_p (th_p, 1); | |
760 | if (err != TD_OK) | |
8a3fe4f8 | 761 | error (_("Cannot enable thread event reporting for %s: %s"), |
39f77062 | 762 | target_pid_to_str (ptid), thread_db_err_str (err)); |
fb0e1ba7 MK |
763 | } |
764 | ||
c194fbe1 MK |
765 | static void |
766 | thread_db_attach (char *args, int from_tty) | |
767 | { | |
768 | target_beneath->to_attach (args, from_tty); | |
769 | ||
770 | /* Destroy thread info; it's no longer valid. */ | |
771 | init_thread_list (); | |
772 | ||
773 | /* The child process is now the actual multi-threaded | |
774 | program. Snatch its process ID... */ | |
775 | proc_handle.pid = GET_PID (inferior_ptid); | |
776 | ||
777 | /* ...and perform the remaining initialization steps. */ | |
778 | enable_thread_event_reporting (); | |
b4acd559 | 779 | thread_db_find_new_threads (); |
c194fbe1 MK |
780 | } |
781 | ||
fb0e1ba7 | 782 | static void |
39f77062 | 783 | detach_thread (ptid_t ptid, int verbose) |
fb0e1ba7 | 784 | { |
a2f23071 DJ |
785 | struct thread_info *thread_info; |
786 | ||
fb0e1ba7 | 787 | if (verbose) |
a3f17187 | 788 | printf_unfiltered (_("[%s exited]\n"), target_pid_to_str (ptid)); |
a2f23071 DJ |
789 | |
790 | /* Don't delete the thread now, because it still reports as active | |
791 | until it has executed a few instructions after the event | |
792 | breakpoint - if we deleted it now, "info threads" would cause us | |
793 | to re-attach to it. Just mark it as having had a TD_DEATH | |
794 | event. This means that we won't delete it from our thread list | |
795 | until we notice that it's dead (via prune_threads), or until | |
796 | something re-uses its thread ID. */ | |
797 | thread_info = find_thread_pid (ptid); | |
798 | gdb_assert (thread_info != NULL); | |
799 | thread_info->private->dying = 1; | |
fb0e1ba7 MK |
800 | } |
801 | ||
802 | static void | |
803 | thread_db_detach (char *args, int from_tty) | |
804 | { | |
805 | disable_thread_event_reporting (); | |
c194fbe1 MK |
806 | |
807 | /* There's no need to save & restore inferior_ptid here, since the | |
808 | inferior is supposed to be survive this function call. */ | |
809 | inferior_ptid = lwp_from_thread (inferior_ptid); | |
810 | ||
811 | /* Forget about the child's process ID. We shouldn't need it | |
812 | anymore. */ | |
813 | proc_handle.pid = 0; | |
fb0e1ba7 MK |
814 | |
815 | target_beneath->to_detach (args, from_tty); | |
816 | } | |
817 | ||
5365276c DJ |
818 | static int |
819 | clear_lwpid_callback (struct thread_info *thread, void *dummy) | |
820 | { | |
821 | /* If we know that our thread implementation is 1-to-1, we could save | |
822 | a certain amount of information; it's not clear how much, so we | |
823 | are always conservative. */ | |
824 | ||
825 | thread->private->th_valid = 0; | |
826 | thread->private->ti_valid = 0; | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
fb0e1ba7 | 831 | static void |
39f77062 | 832 | thread_db_resume (ptid_t ptid, int step, enum target_signal signo) |
fb0e1ba7 | 833 | { |
39f77062 | 834 | struct cleanup *old_chain = save_inferior_ptid (); |
fb0e1ba7 | 835 | |
39f77062 KB |
836 | if (GET_PID (ptid) == -1) |
837 | inferior_ptid = lwp_from_thread (inferior_ptid); | |
838 | else if (is_thread (ptid)) | |
839 | ptid = lwp_from_thread (ptid); | |
fb0e1ba7 | 840 | |
5365276c DJ |
841 | /* Clear cached data which may not be valid after the resume. */ |
842 | iterate_over_threads (clear_lwpid_callback, NULL); | |
843 | ||
39f77062 | 844 | target_beneath->to_resume (ptid, step, signo); |
fb0e1ba7 MK |
845 | |
846 | do_cleanups (old_chain); | |
847 | } | |
848 | ||
849 | /* Check if PID is currently stopped at the location of a thread event | |
850 | breakpoint location. If it is, read the event message and act upon | |
851 | the event. */ | |
852 | ||
853 | static void | |
39f77062 | 854 | check_event (ptid_t ptid) |
fb0e1ba7 MK |
855 | { |
856 | td_event_msg_t msg; | |
857 | td_thrinfo_t ti; | |
858 | td_err_e err; | |
859 | CORE_ADDR stop_pc; | |
4d9850d3 | 860 | int loop = 0; |
fb0e1ba7 MK |
861 | |
862 | /* Bail out early if we're not at a thread event breakpoint. */ | |
39f77062 | 863 | stop_pc = read_pc_pid (ptid) - DECR_PC_AFTER_BREAK; |
fb0e1ba7 MK |
864 | if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr) |
865 | return; | |
866 | ||
4d9850d3 JJ |
867 | /* If we are at a create breakpoint, we do not know what new lwp |
868 | was created and cannot specifically locate the event message for it. | |
869 | We have to call td_ta_event_getmsg() to get | |
870 | the latest message. Since we have no way of correlating whether | |
cdbc0b18 | 871 | the event message we get back corresponds to our breakpoint, we must |
4d9850d3 | 872 | loop and read all event messages, processing them appropriately. |
cdbc0b18 RM |
873 | This guarantees we will process the correct message before continuing |
874 | from the breakpoint. | |
4d9850d3 JJ |
875 | |
876 | Currently, death events are not enabled. If they are enabled, | |
877 | the death event can use the td_thr_event_getmsg() interface to | |
878 | get the message specifically for that lwp and avoid looping | |
879 | below. */ | |
880 | ||
881 | loop = 1; | |
882 | ||
883 | do | |
fb0e1ba7 | 884 | { |
4d9850d3 JJ |
885 | err = td_ta_event_getmsg_p (thread_agent, &msg); |
886 | if (err != TD_OK) | |
887 | { | |
888 | if (err == TD_NOMSG) | |
889 | return; | |
fb0e1ba7 | 890 | |
8a3fe4f8 | 891 | error (_("Cannot get thread event message: %s"), |
4d9850d3 JJ |
892 | thread_db_err_str (err)); |
893 | } | |
fb0e1ba7 | 894 | |
4d9850d3 JJ |
895 | err = td_thr_get_info_p (msg.th_p, &ti); |
896 | if (err != TD_OK) | |
8a3fe4f8 | 897 | error (_("Cannot get thread info: %s"), thread_db_err_str (err)); |
fb0e1ba7 | 898 | |
1bac0d4d | 899 | ptid = ptid_build (GET_PID (ptid), ti.ti_lid, ti.ti_tid); |
fb0e1ba7 | 900 | |
4d9850d3 JJ |
901 | switch (msg.event) |
902 | { | |
903 | case TD_CREATE: | |
a2f23071 DJ |
904 | /* Call attach_thread whether or not we already know about a |
905 | thread with this thread ID. */ | |
906 | attach_thread (ptid, msg.th_p, &ti, 1); | |
fb0e1ba7 | 907 | |
4d9850d3 | 908 | break; |
fb0e1ba7 | 909 | |
4d9850d3 | 910 | case TD_DEATH: |
fb0e1ba7 | 911 | |
4d9850d3 | 912 | if (!in_thread_list (ptid)) |
8a3fe4f8 | 913 | error (_("Spurious thread death event.")); |
fb0e1ba7 | 914 | |
4d9850d3 | 915 | detach_thread (ptid, 1); |
fb0e1ba7 | 916 | |
4d9850d3 | 917 | break; |
fb0e1ba7 | 918 | |
4d9850d3 | 919 | default: |
8a3fe4f8 | 920 | error (_("Spurious thread event.")); |
4d9850d3 | 921 | } |
fb0e1ba7 | 922 | } |
4d9850d3 | 923 | while (loop); |
fb0e1ba7 MK |
924 | } |
925 | ||
39f77062 KB |
926 | static ptid_t |
927 | thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
fb0e1ba7 | 928 | { |
39f77062 | 929 | extern ptid_t trap_ptid; |
fb0e1ba7 | 930 | |
39f77062 KB |
931 | if (GET_PID (ptid) != -1 && is_thread (ptid)) |
932 | ptid = lwp_from_thread (ptid); | |
fb0e1ba7 | 933 | |
39f77062 | 934 | ptid = target_beneath->to_wait (ptid, ourstatus); |
fb0e1ba7 | 935 | |
bda9cb72 MK |
936 | if (proc_handle.pid == 0) |
937 | /* The current child process isn't the actual multi-threaded | |
938 | program yet, so don't try to do any special thread-specific | |
939 | post-processing and bail out early. */ | |
39f77062 | 940 | return ptid; |
bda9cb72 | 941 | |
fb0e1ba7 | 942 | if (ourstatus->kind == TARGET_WAITKIND_EXITED) |
39f77062 | 943 | return pid_to_ptid (-1); |
fb0e1ba7 MK |
944 | |
945 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED | |
946 | && ourstatus->value.sig == TARGET_SIGNAL_TRAP) | |
947 | /* Check for a thread event. */ | |
39f77062 | 948 | check_event (ptid); |
fb0e1ba7 | 949 | |
39f77062 KB |
950 | if (!ptid_equal (trap_ptid, null_ptid)) |
951 | trap_ptid = thread_from_lwp (trap_ptid); | |
fb0e1ba7 | 952 | |
b9b5d7ea JJ |
953 | /* Change the ptid back into the higher level PID + TID format. |
954 | If the thread is dead and no longer on the thread list, we will | |
955 | get back a dead ptid. This can occur if the thread death event | |
956 | gets postponed by other simultaneous events. In such a case, | |
957 | we want to just ignore the event and continue on. */ | |
958 | ptid = thread_from_lwp (ptid); | |
959 | if (GET_PID (ptid) == -1) | |
960 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; | |
961 | ||
962 | return ptid; | |
fb0e1ba7 MK |
963 | } |
964 | ||
10d6c8cd DJ |
965 | static LONGEST |
966 | thread_db_xfer_partial (struct target_ops *ops, enum target_object object, | |
967 | const char *annex, gdb_byte *readbuf, | |
968 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
fb0e1ba7 | 969 | { |
39f77062 | 970 | struct cleanup *old_chain = save_inferior_ptid (); |
10d6c8cd | 971 | LONGEST xfer; |
fb0e1ba7 | 972 | |
39f77062 | 973 | if (is_thread (inferior_ptid)) |
fb0e1ba7 MK |
974 | { |
975 | /* FIXME: This seems to be necessary to make sure breakpoints | |
976 | are removed. */ | |
21bf60fe | 977 | if (!target_thread_alive (inferior_ptid)) |
39f77062 | 978 | inferior_ptid = pid_to_ptid (GET_PID (inferior_ptid)); |
fb0e1ba7 | 979 | else |
39f77062 | 980 | inferior_ptid = lwp_from_thread (inferior_ptid); |
fb0e1ba7 MK |
981 | } |
982 | ||
10d6c8cd DJ |
983 | xfer = target_beneath->to_xfer_partial (ops, object, annex, |
984 | readbuf, writebuf, offset, len); | |
fb0e1ba7 MK |
985 | |
986 | do_cleanups (old_chain); | |
987 | return xfer; | |
988 | } | |
989 | ||
990 | static void | |
991 | thread_db_fetch_registers (int regno) | |
992 | { | |
5365276c | 993 | struct thread_info *thread_info; |
fb0e1ba7 MK |
994 | prgregset_t gregset; |
995 | gdb_prfpregset_t fpregset; | |
996 | td_err_e err; | |
997 | ||
21bf60fe | 998 | if (!is_thread (inferior_ptid)) |
fb0e1ba7 MK |
999 | { |
1000 | /* Pass the request to the target beneath us. */ | |
1001 | target_beneath->to_fetch_registers (regno); | |
1002 | return; | |
1003 | } | |
1004 | ||
5365276c DJ |
1005 | thread_info = find_thread_pid (inferior_ptid); |
1006 | thread_db_map_id2thr (thread_info, 1); | |
fb0e1ba7 | 1007 | |
5365276c | 1008 | err = td_thr_getgregs_p (&thread_info->private->th, gregset); |
fb0e1ba7 | 1009 | if (err != TD_OK) |
8a3fe4f8 | 1010 | error (_("Cannot fetch general-purpose registers for thread %ld: %s"), |
39f77062 | 1011 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
fb0e1ba7 | 1012 | |
5365276c | 1013 | err = td_thr_getfpregs_p (&thread_info->private->th, &fpregset); |
fb0e1ba7 | 1014 | if (err != TD_OK) |
8a3fe4f8 | 1015 | error (_("Cannot get floating-point registers for thread %ld: %s"), |
39f77062 | 1016 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
fb0e1ba7 MK |
1017 | |
1018 | /* Note that we must call supply_gregset after calling the thread_db | |
1019 | routines because the thread_db routines call ps_lgetgregs and | |
1020 | friends which clobber GDB's register cache. */ | |
1021 | supply_gregset ((gdb_gregset_t *) gregset); | |
1022 | supply_fpregset (&fpregset); | |
1023 | } | |
1024 | ||
1025 | static void | |
1026 | thread_db_store_registers (int regno) | |
1027 | { | |
fb0e1ba7 MK |
1028 | prgregset_t gregset; |
1029 | gdb_prfpregset_t fpregset; | |
1030 | td_err_e err; | |
5365276c | 1031 | struct thread_info *thread_info; |
fb0e1ba7 | 1032 | |
21bf60fe | 1033 | if (!is_thread (inferior_ptid)) |
fb0e1ba7 MK |
1034 | { |
1035 | /* Pass the request to the target beneath us. */ | |
1036 | target_beneath->to_store_registers (regno); | |
1037 | return; | |
1038 | } | |
1039 | ||
5365276c DJ |
1040 | thread_info = find_thread_pid (inferior_ptid); |
1041 | thread_db_map_id2thr (thread_info, 1); | |
fb0e1ba7 MK |
1042 | |
1043 | if (regno != -1) | |
1044 | { | |
123a958e | 1045 | char raw[MAX_REGISTER_SIZE]; |
fb0e1ba7 | 1046 | |
4caf0990 | 1047 | deprecated_read_register_gen (regno, raw); |
fb0e1ba7 | 1048 | thread_db_fetch_registers (-1); |
23a6d369 | 1049 | regcache_raw_supply (current_regcache, regno, raw); |
fb0e1ba7 MK |
1050 | } |
1051 | ||
1052 | fill_gregset ((gdb_gregset_t *) gregset, -1); | |
1053 | fill_fpregset (&fpregset, -1); | |
1054 | ||
5365276c | 1055 | err = td_thr_setgregs_p (&thread_info->private->th, gregset); |
fb0e1ba7 | 1056 | if (err != TD_OK) |
8a3fe4f8 | 1057 | error (_("Cannot store general-purpose registers for thread %ld: %s"), |
39f77062 | 1058 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
5365276c | 1059 | err = td_thr_setfpregs_p (&thread_info->private->th, &fpregset); |
fb0e1ba7 | 1060 | if (err != TD_OK) |
8a3fe4f8 | 1061 | error (_("Cannot store floating-point registers for thread %ld: %s"), |
39f77062 | 1062 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
fb0e1ba7 MK |
1063 | } |
1064 | ||
1065 | static void | |
1066 | thread_db_kill (void) | |
1067 | { | |
c194fbe1 MK |
1068 | /* There's no need to save & restore inferior_ptid here, since the |
1069 | inferior isn't supposed to survive this function call. */ | |
1070 | inferior_ptid = lwp_from_thread (inferior_ptid); | |
fb0e1ba7 MK |
1071 | target_beneath->to_kill (); |
1072 | } | |
1073 | ||
1074 | static void | |
c27cda74 AC |
1075 | thread_db_create_inferior (char *exec_file, char *allargs, char **env, |
1076 | int from_tty) | |
fb0e1ba7 | 1077 | { |
b26a6851 AC |
1078 | unpush_target (&thread_db_ops); |
1079 | using_thread_db = 0; | |
c27cda74 | 1080 | target_beneath->to_create_inferior (exec_file, allargs, env, from_tty); |
bda9cb72 | 1081 | } |
fb0e1ba7 | 1082 | |
bda9cb72 | 1083 | static void |
39f77062 | 1084 | thread_db_post_startup_inferior (ptid_t ptid) |
bda9cb72 MK |
1085 | { |
1086 | if (proc_handle.pid == 0) | |
1087 | { | |
1088 | /* The child process is now the actual multi-threaded | |
1089 | program. Snatch its process ID... */ | |
39f77062 | 1090 | proc_handle.pid = GET_PID (ptid); |
fb0e1ba7 | 1091 | |
bda9cb72 MK |
1092 | /* ...and perform the remaining initialization steps. */ |
1093 | enable_thread_event_reporting (); | |
21bf60fe | 1094 | thread_db_find_new_threads (); |
bda9cb72 | 1095 | } |
fb0e1ba7 MK |
1096 | } |
1097 | ||
1098 | static void | |
1099 | thread_db_mourn_inferior (void) | |
1100 | { | |
1101 | remove_thread_event_breakpoints (); | |
c194fbe1 MK |
1102 | |
1103 | /* Forget about the child's process ID. We shouldn't need it | |
1104 | anymore. */ | |
1105 | proc_handle.pid = 0; | |
fb0e1ba7 MK |
1106 | |
1107 | target_beneath->to_mourn_inferior (); | |
043b2f77 | 1108 | |
b26a6851 AC |
1109 | /* Detach thread_db target ops. */ |
1110 | unpush_target (&thread_db_ops); | |
1111 | using_thread_db = 0; | |
fb0e1ba7 MK |
1112 | } |
1113 | ||
1114 | static int | |
39f77062 | 1115 | thread_db_thread_alive (ptid_t ptid) |
fb0e1ba7 | 1116 | { |
5fd913cc | 1117 | td_thrhandle_t th; |
21bf60fe | 1118 | td_err_e err; |
5fd913cc | 1119 | |
39f77062 | 1120 | if (is_thread (ptid)) |
fb0e1ba7 | 1121 | { |
5365276c DJ |
1122 | struct thread_info *thread_info; |
1123 | thread_info = find_thread_pid (ptid); | |
fb0e1ba7 | 1124 | |
5365276c | 1125 | thread_db_map_id2thr (thread_info, 0); |
b4acd559 | 1126 | if (!thread_info->private->th_valid) |
fb0e1ba7 MK |
1127 | return 0; |
1128 | ||
5365276c | 1129 | err = td_thr_validate_p (&thread_info->private->th); |
5fd913cc MS |
1130 | if (err != TD_OK) |
1131 | return 0; | |
1132 | ||
b4acd559 | 1133 | if (!thread_info->private->ti_valid) |
5365276c | 1134 | { |
b4acd559 JJ |
1135 | err = |
1136 | td_thr_get_info_p (&thread_info->private->th, | |
1137 | &thread_info->private->ti); | |
5365276c DJ |
1138 | if (err != TD_OK) |
1139 | return 0; | |
1140 | thread_info->private->ti_valid = 1; | |
1141 | } | |
1142 | ||
1143 | if (thread_info->private->ti.ti_state == TD_THR_UNKNOWN | |
1144 | || thread_info->private->ti.ti_state == TD_THR_ZOMBIE) | |
21bf60fe | 1145 | return 0; /* A zombie thread. */ |
5fd913cc | 1146 | |
fb0e1ba7 MK |
1147 | return 1; |
1148 | } | |
1149 | ||
1150 | if (target_beneath->to_thread_alive) | |
39f77062 | 1151 | return target_beneath->to_thread_alive (ptid); |
fb0e1ba7 MK |
1152 | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static int | |
1157 | find_new_threads_callback (const td_thrhandle_t *th_p, void *data) | |
1158 | { | |
1159 | td_thrinfo_t ti; | |
1160 | td_err_e err; | |
39f77062 | 1161 | ptid_t ptid; |
fb0e1ba7 MK |
1162 | |
1163 | err = td_thr_get_info_p (th_p, &ti); | |
1164 | if (err != TD_OK) | |
8a3fe4f8 | 1165 | error (_("find_new_threads_callback: cannot get thread info: %s"), |
3197744f | 1166 | thread_db_err_str (err)); |
fb0e1ba7 | 1167 | |
21bf60fe MK |
1168 | if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE) |
1169 | return 0; /* A zombie -- ignore. */ | |
5fd913cc | 1170 | |
1bac0d4d | 1171 | ptid = ptid_build (GET_PID (inferior_ptid), ti.ti_lid, ti.ti_tid); |
fb0e1ba7 | 1172 | |
21bf60fe | 1173 | if (!in_thread_list (ptid)) |
39f77062 | 1174 | attach_thread (ptid, th_p, &ti, 1); |
fb0e1ba7 MK |
1175 | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | static void | |
1180 | thread_db_find_new_threads (void) | |
1181 | { | |
1182 | td_err_e err; | |
1183 | ||
1184 | /* Iterate over all user-space threads to discover new threads. */ | |
1185 | err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL, | |
1186 | TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, | |
1187 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); | |
1188 | if (err != TD_OK) | |
8a3fe4f8 | 1189 | error (_("Cannot find new threads: %s"), thread_db_err_str (err)); |
fb0e1ba7 MK |
1190 | } |
1191 | ||
1192 | static char * | |
39f77062 | 1193 | thread_db_pid_to_str (ptid_t ptid) |
fb0e1ba7 | 1194 | { |
39f77062 | 1195 | if (is_thread (ptid)) |
fb0e1ba7 MK |
1196 | { |
1197 | static char buf[64]; | |
5365276c | 1198 | td_thrinfo_t *ti_p; |
fb0e1ba7 | 1199 | td_err_e err; |
5365276c | 1200 | struct thread_info *thread_info; |
fb0e1ba7 | 1201 | |
5365276c DJ |
1202 | thread_info = find_thread_pid (ptid); |
1203 | thread_db_map_id2thr (thread_info, 0); | |
b4acd559 | 1204 | if (!thread_info->private->th_valid) |
5365276c | 1205 | { |
b4acd559 JJ |
1206 | snprintf (buf, sizeof (buf), "Thread %ld (Missing)", |
1207 | GET_THREAD (ptid)); | |
5365276c DJ |
1208 | return buf; |
1209 | } | |
fb0e1ba7 | 1210 | |
5365276c | 1211 | ti_p = thread_db_get_info (thread_info); |
fb0e1ba7 | 1212 | |
5365276c | 1213 | if (ti_p->ti_state == TD_THR_ACTIVE && ti_p->ti_lid != 0) |
fb0e1ba7 MK |
1214 | { |
1215 | snprintf (buf, sizeof (buf), "Thread %ld (LWP %d)", | |
5365276c | 1216 | (long) ti_p->ti_tid, ti_p->ti_lid); |
fb0e1ba7 MK |
1217 | } |
1218 | else | |
1219 | { | |
1220 | snprintf (buf, sizeof (buf), "Thread %ld (%s)", | |
b4acd559 JJ |
1221 | (long) ti_p->ti_tid, |
1222 | thread_db_state_str (ti_p->ti_state)); | |
fb0e1ba7 MK |
1223 | } |
1224 | ||
1225 | return buf; | |
1226 | } | |
1227 | ||
39f77062 KB |
1228 | if (target_beneath->to_pid_to_str (ptid)) |
1229 | return target_beneath->to_pid_to_str (ptid); | |
fb0e1ba7 | 1230 | |
39f77062 | 1231 | return normal_pid_to_str (ptid); |
fb0e1ba7 MK |
1232 | } |
1233 | ||
b2756930 KB |
1234 | /* Get the address of the thread local variable in load module LM which |
1235 | is stored at OFFSET within the thread local storage for thread PTID. */ | |
3f47be5c EZ |
1236 | |
1237 | static CORE_ADDR | |
b2756930 KB |
1238 | thread_db_get_thread_local_address (ptid_t ptid, |
1239 | CORE_ADDR lm, | |
b4acd559 | 1240 | CORE_ADDR offset) |
3f47be5c EZ |
1241 | { |
1242 | if (is_thread (ptid)) | |
1243 | { | |
3f47be5c | 1244 | td_err_e err; |
3f47be5c | 1245 | void *address; |
5365276c | 1246 | struct thread_info *thread_info; |
3f47be5c EZ |
1247 | |
1248 | /* glibc doesn't provide the needed interface. */ | |
b4acd559 | 1249 | if (!td_thr_tls_get_addr_p) |
109c3e39 AC |
1250 | throw_error (TLS_NO_LIBRARY_SUPPORT_ERROR, |
1251 | _("No TLS library support")); | |
3f47be5c | 1252 | |
b2756930 KB |
1253 | /* Caller should have verified that lm != 0. */ |
1254 | gdb_assert (lm != 0); | |
3f47be5c EZ |
1255 | |
1256 | /* Get info about the thread. */ | |
5365276c DJ |
1257 | thread_info = find_thread_pid (ptid); |
1258 | thread_db_map_id2thr (thread_info, 1); | |
1259 | ||
3f47be5c | 1260 | /* Finally, get the address of the variable. */ |
5365276c DJ |
1261 | err = td_thr_tls_get_addr_p (&thread_info->private->th, (void *) lm, |
1262 | offset, &address); | |
3f47be5c EZ |
1263 | |
1264 | #ifdef THREAD_DB_HAS_TD_NOTALLOC | |
1265 | /* The memory hasn't been allocated, yet. */ | |
1266 | if (err == TD_NOTALLOC) | |
b4acd559 JJ |
1267 | /* Now, if libthread_db provided the initialization image's |
1268 | address, we *could* try to build a non-lvalue value from | |
1269 | the initialization image. */ | |
109c3e39 AC |
1270 | throw_error (TLS_NOT_ALLOCATED_YET_ERROR, |
1271 | _("TLS not allocated yet")); | |
3f47be5c EZ |
1272 | #endif |
1273 | ||
1274 | /* Something else went wrong. */ | |
1275 | if (err != TD_OK) | |
109c3e39 AC |
1276 | throw_error (TLS_GENERIC_ERROR, |
1277 | (("%s")), thread_db_err_str (err)); | |
3f47be5c EZ |
1278 | |
1279 | /* Cast assuming host == target. Joy. */ | |
1280 | return (CORE_ADDR) address; | |
1281 | } | |
1282 | ||
1283 | if (target_beneath->to_get_thread_local_address) | |
b2756930 | 1284 | return target_beneath->to_get_thread_local_address (ptid, lm, offset); |
93ad78a7 | 1285 | else |
109c3e39 AC |
1286 | throw_error (TLS_GENERIC_ERROR, |
1287 | _("TLS not supported on this target")); | |
3f47be5c EZ |
1288 | } |
1289 | ||
fb0e1ba7 MK |
1290 | static void |
1291 | init_thread_db_ops (void) | |
1292 | { | |
1293 | thread_db_ops.to_shortname = "multi-thread"; | |
1294 | thread_db_ops.to_longname = "multi-threaded child process."; | |
1295 | thread_db_ops.to_doc = "Threads and pthreads support."; | |
c194fbe1 | 1296 | thread_db_ops.to_attach = thread_db_attach; |
fb0e1ba7 MK |
1297 | thread_db_ops.to_detach = thread_db_detach; |
1298 | thread_db_ops.to_resume = thread_db_resume; | |
1299 | thread_db_ops.to_wait = thread_db_wait; | |
1300 | thread_db_ops.to_fetch_registers = thread_db_fetch_registers; | |
1301 | thread_db_ops.to_store_registers = thread_db_store_registers; | |
10d6c8cd | 1302 | thread_db_ops.to_xfer_partial = thread_db_xfer_partial; |
fb0e1ba7 MK |
1303 | thread_db_ops.to_kill = thread_db_kill; |
1304 | thread_db_ops.to_create_inferior = thread_db_create_inferior; | |
bda9cb72 | 1305 | thread_db_ops.to_post_startup_inferior = thread_db_post_startup_inferior; |
fb0e1ba7 MK |
1306 | thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior; |
1307 | thread_db_ops.to_thread_alive = thread_db_thread_alive; | |
1308 | thread_db_ops.to_find_new_threads = thread_db_find_new_threads; | |
1309 | thread_db_ops.to_pid_to_str = thread_db_pid_to_str; | |
1310 | thread_db_ops.to_stratum = thread_stratum; | |
1311 | thread_db_ops.to_has_thread_control = tc_schedlock; | |
3f47be5c EZ |
1312 | thread_db_ops.to_get_thread_local_address |
1313 | = thread_db_get_thread_local_address; | |
fb0e1ba7 MK |
1314 | thread_db_ops.to_magic = OPS_MAGIC; |
1315 | } | |
1316 | ||
1317 | void | |
1318 | _initialize_thread_db (void) | |
1319 | { | |
1320 | /* Only initialize the module if we can load libthread_db. */ | |
1321 | if (thread_db_load ()) | |
1322 | { | |
1323 | init_thread_db_ops (); | |
1324 | add_target (&thread_db_ops); | |
1325 | ||
1326 | /* Add ourselves to objfile event chain. */ | |
9a4105ab AC |
1327 | target_new_objfile_chain = deprecated_target_new_objfile_hook; |
1328 | deprecated_target_new_objfile_hook = thread_db_new_objfile; | |
fb0e1ba7 MK |
1329 | } |
1330 | } |