Commit | Line | Data |
---|---|---|
fb0e1ba7 | 1 | /* libthread_db assisted debugging support, generic parts. |
4e052eda | 2 | Copyright 1999, 2000, 2001 Free Software Foundation, Inc. |
fb0e1ba7 MK |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "defs.h" | |
22 | ||
23 | #include "gdb_assert.h" | |
24 | #include <dlfcn.h> | |
25 | #include "gdb_proc_service.h" | |
26 | #include "gdb_thread_db.h" | |
27 | ||
bda9cb72 | 28 | #include "bfd.h" |
fb0e1ba7 MK |
29 | #include "gdbthread.h" |
30 | #include "inferior.h" | |
bda9cb72 MK |
31 | #include "symfile.h" |
32 | #include "objfiles.h" | |
fb0e1ba7 | 33 | #include "target.h" |
4e052eda | 34 | #include "regcache.h" |
3f47be5c | 35 | #include "solib-svr4.h" |
fb0e1ba7 MK |
36 | |
37 | #ifndef LIBTHREAD_DB_SO | |
38 | #define LIBTHREAD_DB_SO "libthread_db.so.1" | |
39 | #endif | |
40 | ||
8605d56e AC |
41 | /* If we're running on GNU/Linux, we must explicitly attach to any new |
42 | threads. */ | |
fb0e1ba7 MK |
43 | |
44 | /* FIXME: There is certainly some room for improvements: | |
45 | - Cache LWP ids. | |
46 | - Bypass libthread_db when fetching or storing registers for | |
47 | threads bound to a LWP. */ | |
48 | ||
49 | /* This module's target vector. */ | |
50 | static struct target_ops thread_db_ops; | |
51 | ||
52 | /* The target vector that we call for things this module can't handle. */ | |
53 | static struct target_ops *target_beneath; | |
54 | ||
55 | /* Pointer to the next function on the objfile event chain. */ | |
540af400 | 56 | static void (*target_new_objfile_chain) (struct objfile *objfile); |
fb0e1ba7 MK |
57 | |
58 | /* Non-zero if we're using this module's target vector. */ | |
59 | static int using_thread_db; | |
60 | ||
c194fbe1 MK |
61 | /* Non-zero if we have to keep this module's target vector active |
62 | across re-runs. */ | |
bda9cb72 MK |
63 | static int keep_thread_db; |
64 | ||
fb0e1ba7 MK |
65 | /* Non-zero if we have determined the signals used by the threads |
66 | library. */ | |
67 | static int thread_signals; | |
68 | static sigset_t thread_stop_set; | |
69 | static sigset_t thread_print_set; | |
70 | ||
71 | /* Structure that identifies the child process for the | |
72 | <proc_service.h> interface. */ | |
73 | static struct ps_prochandle proc_handle; | |
74 | ||
75 | /* Connection to the libthread_db library. */ | |
76 | static td_thragent_t *thread_agent; | |
77 | ||
78 | /* Pointers to the libthread_db functions. */ | |
79 | ||
80 | static td_err_e (*td_init_p) (void); | |
81 | ||
82 | static td_err_e (*td_ta_new_p) (struct ps_prochandle *ps, td_thragent_t **ta); | |
83 | static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt, | |
84 | td_thrhandle_t *__th); | |
85 | static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta, lwpid_t lwpid, | |
86 | td_thrhandle_t *th); | |
87 | static td_err_e (*td_ta_thr_iter_p) (const td_thragent_t *ta, | |
88 | td_thr_iter_f *callback, | |
89 | void *cbdata_p, td_thr_state_e state, | |
90 | int ti_pri, sigset_t *ti_sigmask_p, | |
91 | unsigned int ti_user_flags); | |
92 | static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta, | |
93 | td_event_e event, td_notify_t *ptr); | |
94 | static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta, | |
95 | td_thr_events_t *event); | |
96 | static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta, | |
97 | td_event_msg_t *msg); | |
98 | ||
99 | static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th); | |
100 | static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th, | |
101 | td_thrinfo_t *infop); | |
102 | static td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th, | |
103 | gdb_prfpregset_t *regset); | |
104 | static td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th, | |
105 | prgregset_t gregs); | |
106 | static td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th, | |
107 | const gdb_prfpregset_t *fpregs); | |
108 | static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th, | |
109 | prgregset_t gregs); | |
110 | static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th, int event); | |
111 | ||
3f47be5c EZ |
112 | static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th, |
113 | void *map_address, | |
114 | size_t offset, | |
115 | void **address); | |
116 | ||
fb0e1ba7 MK |
117 | /* Location of the thread creation event breakpoint. The code at this |
118 | location in the child process will be called by the pthread library | |
119 | whenever a new thread is created. By setting a special breakpoint | |
120 | at this location, GDB can detect when a new thread is created. We | |
121 | obtain this location via the td_ta_event_addr call. */ | |
122 | static CORE_ADDR td_create_bp_addr; | |
123 | ||
124 | /* Location of the thread death event breakpoint. */ | |
125 | static CORE_ADDR td_death_bp_addr; | |
126 | ||
127 | /* Prototypes for local functions. */ | |
bda9cb72 | 128 | static void thread_db_find_new_threads (void); |
5365276c DJ |
129 | static void attach_thread (ptid_t ptid, const td_thrhandle_t *th_p, |
130 | const td_thrinfo_t *ti_p, int verbose); | |
fb0e1ba7 MK |
131 | \f |
132 | ||
133 | /* Building process ids. */ | |
134 | ||
ca6724c1 KB |
135 | #define GET_PID(ptid) ptid_get_pid (ptid) |
136 | #define GET_LWP(ptid) ptid_get_lwp (ptid) | |
137 | #define GET_THREAD(ptid) ptid_get_tid (ptid) | |
fb0e1ba7 | 138 | |
ca6724c1 KB |
139 | #define is_lwp(ptid) (GET_LWP (ptid) != 0) |
140 | #define is_thread(ptid) (GET_THREAD (ptid) != 0) | |
fb0e1ba7 | 141 | |
ca6724c1 KB |
142 | #define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0) |
143 | #define BUILD_THREAD(tid, pid) ptid_build (pid, 0, tid) | |
fb0e1ba7 MK |
144 | \f |
145 | ||
5365276c DJ |
146 | /* Use "struct private_thread_info" to cache thread state. This is |
147 | a substantial optimization. */ | |
148 | ||
fb0e1ba7 MK |
149 | struct private_thread_info |
150 | { | |
5365276c DJ |
151 | /* Cached thread state. */ |
152 | unsigned int th_valid : 1; | |
153 | unsigned int ti_valid : 1; | |
154 | ||
155 | td_thrhandle_t th; | |
156 | td_thrinfo_t ti; | |
fb0e1ba7 | 157 | }; |
fb0e1ba7 | 158 | \f |
21bf60fe | 159 | |
fb0e1ba7 MK |
160 | static char * |
161 | thread_db_err_str (td_err_e err) | |
162 | { | |
163 | static char buf[64]; | |
164 | ||
165 | switch (err) | |
166 | { | |
167 | case TD_OK: | |
168 | return "generic 'call succeeded'"; | |
169 | case TD_ERR: | |
170 | return "generic error"; | |
171 | case TD_NOTHR: | |
172 | return "no thread to satisfy query"; | |
173 | case TD_NOSV: | |
174 | return "no sync handle to satisfy query"; | |
175 | case TD_NOLWP: | |
176 | return "no LWP to satisfy query"; | |
177 | case TD_BADPH: | |
178 | return "invalid process handle"; | |
179 | case TD_BADTH: | |
180 | return "invalid thread handle"; | |
181 | case TD_BADSH: | |
182 | return "invalid synchronization handle"; | |
183 | case TD_BADTA: | |
184 | return "invalid thread agent"; | |
185 | case TD_BADKEY: | |
186 | return "invalid key"; | |
187 | case TD_NOMSG: | |
188 | return "no event message for getmsg"; | |
189 | case TD_NOFPREGS: | |
190 | return "FPU register set not available"; | |
191 | case TD_NOLIBTHREAD: | |
192 | return "application not linked with libthread"; | |
193 | case TD_NOEVENT: | |
194 | return "requested event is not supported"; | |
195 | case TD_NOCAPAB: | |
196 | return "capability not available"; | |
197 | case TD_DBERR: | |
198 | return "debugger service failed"; | |
199 | case TD_NOAPLIC: | |
200 | return "operation not applicable to"; | |
201 | case TD_NOTSD: | |
202 | return "no thread-specific data for this thread"; | |
203 | case TD_MALLOC: | |
204 | return "malloc failed"; | |
205 | case TD_PARTIALREG: | |
206 | return "only part of register set was written/read"; | |
207 | case TD_NOXREGS: | |
208 | return "X register set not available for this thread"; | |
209 | default: | |
210 | snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err); | |
211 | return buf; | |
212 | } | |
213 | } | |
214 | ||
215 | static char * | |
216 | thread_db_state_str (td_thr_state_e state) | |
217 | { | |
218 | static char buf[64]; | |
219 | ||
220 | switch (state) | |
221 | { | |
222 | case TD_THR_STOPPED: | |
223 | return "stopped by debugger"; | |
224 | case TD_THR_RUN: | |
225 | return "runnable"; | |
226 | case TD_THR_ACTIVE: | |
227 | return "active"; | |
228 | case TD_THR_ZOMBIE: | |
229 | return "zombie"; | |
230 | case TD_THR_SLEEP: | |
231 | return "sleeping"; | |
232 | case TD_THR_STOPPED_ASLEEP: | |
233 | return "stopped by debugger AND blocked"; | |
234 | default: | |
235 | snprintf (buf, sizeof (buf), "unknown thread_db state %d", state); | |
236 | return buf; | |
237 | } | |
238 | } | |
239 | \f | |
5365276c DJ |
240 | /* A callback function for td_ta_thr_iter, which we use to map all |
241 | threads to LWPs. | |
242 | ||
243 | THP is a handle to the current thread; if INFOP is not NULL, the | |
244 | struct thread_info associated with this thread is returned in | |
245 | *INFOP. */ | |
246 | ||
247 | static int | |
248 | thread_get_info_callback (const td_thrhandle_t *thp, void *infop) | |
249 | { | |
250 | td_thrinfo_t ti; | |
251 | td_err_e err; | |
252 | struct thread_info *thread_info; | |
253 | ptid_t thread_ptid; | |
254 | ||
255 | err = td_thr_get_info_p (thp, &ti); | |
256 | if (err != TD_OK) | |
257 | error ("thread_get_info_callback: cannot get thread info: %s", | |
258 | thread_db_err_str (err)); | |
259 | ||
260 | /* Fill the cache. */ | |
261 | thread_ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid)); | |
262 | thread_info = find_thread_pid (thread_ptid); | |
263 | ||
264 | if (thread_info == NULL) | |
265 | { | |
266 | /* New thread. Attach to it now (why wait?). */ | |
267 | attach_thread (thread_ptid, thp, &ti, 1); | |
268 | thread_info = find_thread_pid (thread_ptid); | |
269 | gdb_assert (thread_info != NULL); | |
270 | } | |
271 | ||
272 | memcpy (&thread_info->private->th, thp, sizeof (*thp)); | |
273 | thread_info->private->th_valid = 1; | |
274 | memcpy (&thread_info->private->ti, &ti, sizeof (ti)); | |
275 | thread_info->private->ti_valid = 1; | |
276 | ||
277 | if (infop != NULL) | |
278 | *(struct thread_info **) infop = thread_info; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | /* Accessor functions for the thread_db information, with caching. */ | |
fb0e1ba7 | 284 | |
5365276c DJ |
285 | static void |
286 | thread_db_map_id2thr (struct thread_info *thread_info, int fatal) | |
287 | { | |
288 | td_err_e err; | |
289 | ||
290 | if (thread_info->private->th_valid) | |
291 | return; | |
292 | ||
293 | err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid), | |
294 | &thread_info->private->th); | |
295 | if (err != TD_OK) | |
296 | { | |
297 | if (fatal) | |
298 | error ("Cannot find thread %ld: %s", | |
299 | (long) GET_THREAD (thread_info->ptid), thread_db_err_str (err)); | |
300 | } | |
301 | else | |
302 | thread_info->private->th_valid = 1; | |
303 | } | |
304 | ||
305 | static td_thrinfo_t * | |
306 | thread_db_get_info (struct thread_info *thread_info) | |
307 | { | |
308 | td_err_e err; | |
309 | ||
310 | if (thread_info->private->ti_valid) | |
311 | return &thread_info->private->ti; | |
312 | ||
313 | if (! thread_info->private->th_valid) | |
314 | thread_db_map_id2thr (thread_info, 1); | |
315 | ||
316 | err = td_thr_get_info_p (&thread_info->private->th, &thread_info->private->ti); | |
317 | if (err != TD_OK) | |
318 | error ("thread_db_get_info: cannot get thread info: %s", | |
319 | thread_db_err_str (err)); | |
320 | ||
321 | thread_info->private->ti_valid = 1; | |
322 | return &thread_info->private->ti; | |
323 | } | |
324 | \f | |
fb0e1ba7 MK |
325 | /* Convert between user-level thread ids and LWP ids. */ |
326 | ||
39f77062 KB |
327 | static ptid_t |
328 | thread_from_lwp (ptid_t ptid) | |
fb0e1ba7 | 329 | { |
fb0e1ba7 MK |
330 | td_thrhandle_t th; |
331 | td_err_e err; | |
5365276c DJ |
332 | struct thread_info *thread_info; |
333 | ptid_t thread_ptid; | |
fb0e1ba7 | 334 | |
39f77062 KB |
335 | if (GET_LWP (ptid) == 0) |
336 | ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid)); | |
fb0e1ba7 | 337 | |
39f77062 | 338 | gdb_assert (is_lwp (ptid)); |
fb0e1ba7 | 339 | |
39f77062 | 340 | err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th); |
fb0e1ba7 | 341 | if (err != TD_OK) |
823ca731 | 342 | error ("Cannot find user-level thread for LWP %ld: %s", |
39f77062 | 343 | GET_LWP (ptid), thread_db_err_str (err)); |
fb0e1ba7 | 344 | |
5365276c DJ |
345 | thread_info = NULL; |
346 | thread_get_info_callback (&th, &thread_info); | |
347 | gdb_assert (thread_info && thread_info->private->ti_valid); | |
fb0e1ba7 | 348 | |
5365276c | 349 | return BUILD_THREAD (thread_info->private->ti.ti_tid, GET_PID (ptid)); |
fb0e1ba7 MK |
350 | } |
351 | ||
39f77062 KB |
352 | static ptid_t |
353 | lwp_from_thread (ptid_t ptid) | |
fb0e1ba7 | 354 | { |
5365276c DJ |
355 | struct thread_info *thread_info; |
356 | ptid_t thread_ptid; | |
fb0e1ba7 | 357 | |
21bf60fe | 358 | if (!is_thread (ptid)) |
39f77062 | 359 | return ptid; |
fb0e1ba7 | 360 | |
5365276c DJ |
361 | thread_info = find_thread_pid (ptid); |
362 | thread_db_get_info (thread_info); | |
fb0e1ba7 | 363 | |
5365276c | 364 | return BUILD_LWP (thread_info->private->ti.ti_lid, GET_PID (ptid)); |
fb0e1ba7 MK |
365 | } |
366 | \f | |
367 | ||
368 | void | |
369 | thread_db_init (struct target_ops *target) | |
370 | { | |
371 | target_beneath = target; | |
372 | } | |
373 | ||
374 | static int | |
375 | thread_db_load (void) | |
376 | { | |
377 | void *handle; | |
378 | td_err_e err; | |
379 | ||
380 | handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW); | |
381 | if (handle == NULL) | |
f7c1e0f3 MS |
382 | { |
383 | fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n", | |
384 | LIBTHREAD_DB_SO, dlerror ()); | |
385 | fprintf_filtered (gdb_stderr, | |
386 | "GDB will not be able to debug pthreads.\n\n"); | |
387 | return 0; | |
388 | } | |
fb0e1ba7 MK |
389 | |
390 | /* Initialize pointers to the dynamic library functions we will use. | |
391 | Essential functions first. */ | |
392 | ||
393 | td_init_p = dlsym (handle, "td_init"); | |
394 | if (td_init_p == NULL) | |
395 | return 0; | |
396 | ||
397 | td_ta_new_p = dlsym (handle, "td_ta_new"); | |
398 | if (td_ta_new_p == NULL) | |
399 | return 0; | |
400 | ||
401 | td_ta_map_id2thr_p = dlsym (handle, "td_ta_map_id2thr"); | |
402 | if (td_ta_map_id2thr_p == NULL) | |
403 | return 0; | |
404 | ||
405 | td_ta_map_lwp2thr_p = dlsym (handle, "td_ta_map_lwp2thr"); | |
406 | if (td_ta_map_lwp2thr_p == NULL) | |
407 | return 0; | |
408 | ||
409 | td_ta_thr_iter_p = dlsym (handle, "td_ta_thr_iter"); | |
410 | if (td_ta_thr_iter_p == NULL) | |
411 | return 0; | |
412 | ||
413 | td_thr_validate_p = dlsym (handle, "td_thr_validate"); | |
414 | if (td_thr_validate_p == NULL) | |
415 | return 0; | |
416 | ||
417 | td_thr_get_info_p = dlsym (handle, "td_thr_get_info"); | |
418 | if (td_thr_get_info_p == NULL) | |
419 | return 0; | |
420 | ||
421 | td_thr_getfpregs_p = dlsym (handle, "td_thr_getfpregs"); | |
422 | if (td_thr_getfpregs_p == NULL) | |
423 | return 0; | |
424 | ||
425 | td_thr_getgregs_p = dlsym (handle, "td_thr_getgregs"); | |
426 | if (td_thr_getgregs_p == NULL) | |
427 | return 0; | |
428 | ||
429 | td_thr_setfpregs_p = dlsym (handle, "td_thr_setfpregs"); | |
430 | if (td_thr_setfpregs_p == NULL) | |
431 | return 0; | |
432 | ||
433 | td_thr_setgregs_p = dlsym (handle, "td_thr_setgregs"); | |
434 | if (td_thr_setgregs_p == NULL) | |
435 | return 0; | |
436 | ||
437 | /* Initialize the library. */ | |
438 | err = td_init_p (); | |
439 | if (err != TD_OK) | |
440 | { | |
441 | warning ("Cannot initialize libthread_db: %s", thread_db_err_str (err)); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | /* These are not essential. */ | |
446 | td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr"); | |
447 | td_ta_set_event_p = dlsym (handle, "td_ta_set_event"); | |
448 | td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg"); | |
449 | td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable"); | |
3f47be5c | 450 | td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr"); |
fb0e1ba7 MK |
451 | |
452 | return 1; | |
453 | } | |
454 | ||
455 | static void | |
456 | enable_thread_event_reporting (void) | |
457 | { | |
458 | td_thr_events_t events; | |
459 | td_notify_t notify; | |
460 | td_err_e err; | |
461 | ||
462 | /* We cannot use the thread event reporting facility if these | |
463 | functions aren't available. */ | |
464 | if (td_ta_event_addr_p == NULL || td_ta_set_event_p == NULL | |
465 | || td_ta_event_getmsg_p == NULL || td_thr_event_enable_p == NULL) | |
466 | return; | |
467 | ||
468 | /* Set the process wide mask saying which events we're interested in. */ | |
469 | td_event_emptyset (&events); | |
470 | td_event_addset (&events, TD_CREATE); | |
471 | #if 0 | |
472 | /* FIXME: kettenis/2000-04-23: The event reporting facility is | |
473 | broken for TD_DEATH events in glibc 2.1.3, so don't enable it for | |
474 | now. */ | |
475 | td_event_addset (&events, TD_DEATH); | |
476 | #endif | |
477 | ||
478 | err = td_ta_set_event_p (thread_agent, &events); | |
479 | if (err != TD_OK) | |
480 | { | |
481 | warning ("Unable to set global thread event mask: %s", | |
482 | thread_db_err_str (err)); | |
483 | return; | |
484 | } | |
485 | ||
486 | /* Delete previous thread event breakpoints, if any. */ | |
487 | remove_thread_event_breakpoints (); | |
488 | ||
489 | /* Get address for thread creation breakpoint. */ | |
490 | err = td_ta_event_addr_p (thread_agent, TD_CREATE, ¬ify); | |
491 | if (err != TD_OK) | |
492 | { | |
493 | warning ("Unable to get location for thread creation breakpoint: %s", | |
494 | thread_db_err_str (err)); | |
495 | return; | |
496 | } | |
497 | ||
498 | /* Set up the breakpoint. */ | |
499 | td_create_bp_addr = (CORE_ADDR) notify.u.bptaddr; | |
500 | create_thread_event_breakpoint (td_create_bp_addr); | |
501 | ||
502 | /* Get address for thread death breakpoint. */ | |
503 | err = td_ta_event_addr_p (thread_agent, TD_DEATH, ¬ify); | |
504 | if (err != TD_OK) | |
505 | { | |
936742ab | 506 | warning ("Unable to get location for thread death breakpoint: %s", |
fb0e1ba7 MK |
507 | thread_db_err_str (err)); |
508 | return; | |
509 | } | |
510 | ||
511 | /* Set up the breakpoint. */ | |
512 | td_death_bp_addr = (CORE_ADDR) notify.u.bptaddr; | |
513 | create_thread_event_breakpoint (td_death_bp_addr); | |
514 | } | |
515 | ||
516 | static void | |
517 | disable_thread_event_reporting (void) | |
518 | { | |
519 | td_thr_events_t events; | |
520 | ||
521 | /* Set the process wide mask saying we aren't interested in any | |
522 | events anymore. */ | |
523 | td_event_emptyset (&events); | |
524 | td_ta_set_event_p (thread_agent, &events); | |
525 | ||
526 | /* Delete thread event breakpoints, if any. */ | |
527 | remove_thread_event_breakpoints (); | |
528 | td_create_bp_addr = 0; | |
529 | td_death_bp_addr = 0; | |
530 | } | |
531 | ||
532 | static void | |
533 | check_thread_signals (void) | |
534 | { | |
535 | #ifdef GET_THREAD_SIGNALS | |
21bf60fe | 536 | if (!thread_signals) |
fb0e1ba7 MK |
537 | { |
538 | sigset_t mask; | |
539 | int i; | |
540 | ||
541 | GET_THREAD_SIGNALS (&mask); | |
542 | sigemptyset (&thread_stop_set); | |
543 | sigemptyset (&thread_print_set); | |
544 | ||
b9569773 | 545 | for (i = 1; i < NSIG; i++) |
fb0e1ba7 MK |
546 | { |
547 | if (sigismember (&mask, i)) | |
548 | { | |
549 | if (signal_stop_update (target_signal_from_host (i), 0)) | |
550 | sigaddset (&thread_stop_set, i); | |
551 | if (signal_print_update (target_signal_from_host (i), 0)) | |
552 | sigaddset (&thread_print_set, i); | |
553 | thread_signals = 1; | |
554 | } | |
555 | } | |
556 | } | |
557 | #endif | |
558 | } | |
559 | ||
560 | static void | |
561 | disable_thread_signals (void) | |
562 | { | |
563 | #ifdef GET_THREAD_SIGNALS | |
564 | if (thread_signals) | |
565 | { | |
566 | int i; | |
567 | ||
b9569773 | 568 | for (i = 1; i < NSIG; i++) |
fb0e1ba7 MK |
569 | { |
570 | if (sigismember (&thread_stop_set, i)) | |
571 | signal_stop_update (target_signal_from_host (i), 1); | |
572 | if (sigismember (&thread_print_set, i)) | |
573 | signal_print_update (target_signal_from_host (i), 1); | |
574 | } | |
575 | ||
576 | thread_signals = 0; | |
577 | } | |
578 | #endif | |
579 | } | |
580 | ||
fb0e1ba7 MK |
581 | static void |
582 | thread_db_new_objfile (struct objfile *objfile) | |
583 | { | |
584 | td_err_e err; | |
585 | ||
5bbd998e MS |
586 | /* Don't attempt to use thread_db on targets which can not run |
587 | (core files). */ | |
588 | if (objfile == NULL || !target_has_execution) | |
bda9cb72 MK |
589 | { |
590 | /* All symbols have been discarded. If the thread_db target is | |
c194fbe1 | 591 | active, deactivate it now. */ |
bda9cb72 | 592 | if (using_thread_db) |
c194fbe1 MK |
593 | { |
594 | gdb_assert (proc_handle.pid == 0); | |
595 | unpush_target (&thread_db_ops); | |
596 | using_thread_db = 0; | |
597 | } | |
598 | ||
599 | keep_thread_db = 0; | |
bda9cb72 MK |
600 | |
601 | goto quit; | |
602 | } | |
603 | ||
fb0e1ba7 MK |
604 | if (using_thread_db) |
605 | /* Nothing to do. The thread library was already detected and the | |
606 | target vector was already activated. */ | |
607 | goto quit; | |
608 | ||
bda9cb72 MK |
609 | /* Initialize the structure that identifies the child process. Note |
610 | that at this point there is no guarantee that we actually have a | |
611 | child process. */ | |
39f77062 | 612 | proc_handle.pid = GET_PID (inferior_ptid); |
fb0e1ba7 | 613 | |
bda9cb72 | 614 | /* Now attempt to open a connection to the thread library. */ |
fb0e1ba7 MK |
615 | err = td_ta_new_p (&proc_handle, &thread_agent); |
616 | switch (err) | |
617 | { | |
618 | case TD_NOLIBTHREAD: | |
bda9cb72 | 619 | /* No thread library was detected. */ |
fb0e1ba7 MK |
620 | break; |
621 | ||
622 | case TD_OK: | |
bda9cb72 MK |
623 | /* The thread library was detected. Activate the thread_db target. */ |
624 | push_target (&thread_db_ops); | |
625 | using_thread_db = 1; | |
626 | ||
627 | /* If the thread library was detected in the main symbol file | |
628 | itself, we assume that the program was statically linked | |
629 | against the thread library and well have to keep this | |
630 | module's target vector activated until forever... Well, at | |
631 | least until all symbols have been discarded anyway (see | |
632 | above). */ | |
633 | if (objfile == symfile_objfile) | |
634 | { | |
635 | gdb_assert (proc_handle.pid == 0); | |
636 | keep_thread_db = 1; | |
637 | } | |
638 | ||
639 | /* We can only poke around if there actually is a child process. | |
640 | If there is no child process alive, postpone the steps below | |
641 | until one has been created. */ | |
642 | if (proc_handle.pid != 0) | |
643 | { | |
644 | enable_thread_event_reporting (); | |
645 | thread_db_find_new_threads (); | |
646 | } | |
fb0e1ba7 MK |
647 | break; |
648 | ||
649 | default: | |
650 | warning ("Cannot initialize thread debugging library: %s", | |
651 | thread_db_err_str (err)); | |
652 | break; | |
653 | } | |
654 | ||
655 | quit: | |
540af400 MS |
656 | if (target_new_objfile_chain) |
657 | target_new_objfile_chain (objfile); | |
fb0e1ba7 MK |
658 | } |
659 | ||
660 | static void | |
39f77062 | 661 | attach_thread (ptid_t ptid, const td_thrhandle_t *th_p, |
fb0e1ba7 MK |
662 | const td_thrinfo_t *ti_p, int verbose) |
663 | { | |
664 | struct thread_info *tp; | |
665 | td_err_e err; | |
666 | ||
667 | check_thread_signals (); | |
668 | ||
fb0e1ba7 | 669 | /* Add the thread to GDB's thread list. */ |
39f77062 | 670 | tp = add_thread (ptid); |
fb0e1ba7 | 671 | tp->private = xmalloc (sizeof (struct private_thread_info)); |
5365276c DJ |
672 | memset (tp->private, 0, sizeof (struct private_thread_info)); |
673 | ||
674 | if (verbose) | |
675 | printf_unfiltered ("[New %s]\n", target_pid_to_str (ptid)); | |
fb0e1ba7 | 676 | |
21bf60fe MK |
677 | if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE) |
678 | return; /* A zombie thread -- do not attach. */ | |
5fd913cc | 679 | |
8605d56e | 680 | /* Under GNU/Linux, we have to attach to each and every thread. */ |
fb0e1ba7 | 681 | #ifdef ATTACH_LWP |
c194fbe1 | 682 | ATTACH_LWP (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid)), 0); |
fb0e1ba7 MK |
683 | #endif |
684 | ||
685 | /* Enable thread event reporting for this thread. */ | |
686 | err = td_thr_event_enable_p (th_p, 1); | |
687 | if (err != TD_OK) | |
688 | error ("Cannot enable thread event reporting for %s: %s", | |
39f77062 | 689 | target_pid_to_str (ptid), thread_db_err_str (err)); |
fb0e1ba7 MK |
690 | } |
691 | ||
c194fbe1 MK |
692 | static void |
693 | thread_db_attach (char *args, int from_tty) | |
694 | { | |
695 | target_beneath->to_attach (args, from_tty); | |
696 | ||
697 | /* Destroy thread info; it's no longer valid. */ | |
698 | init_thread_list (); | |
699 | ||
700 | /* The child process is now the actual multi-threaded | |
701 | program. Snatch its process ID... */ | |
702 | proc_handle.pid = GET_PID (inferior_ptid); | |
703 | ||
704 | /* ...and perform the remaining initialization steps. */ | |
705 | enable_thread_event_reporting (); | |
706 | thread_db_find_new_threads(); | |
707 | } | |
708 | ||
fb0e1ba7 | 709 | static void |
39f77062 | 710 | detach_thread (ptid_t ptid, int verbose) |
fb0e1ba7 MK |
711 | { |
712 | if (verbose) | |
39f77062 | 713 | printf_unfiltered ("[%s exited]\n", target_pid_to_str (ptid)); |
fb0e1ba7 MK |
714 | } |
715 | ||
716 | static void | |
717 | thread_db_detach (char *args, int from_tty) | |
718 | { | |
719 | disable_thread_event_reporting (); | |
c194fbe1 MK |
720 | |
721 | /* There's no need to save & restore inferior_ptid here, since the | |
722 | inferior is supposed to be survive this function call. */ | |
723 | inferior_ptid = lwp_from_thread (inferior_ptid); | |
724 | ||
725 | /* Forget about the child's process ID. We shouldn't need it | |
726 | anymore. */ | |
727 | proc_handle.pid = 0; | |
fb0e1ba7 MK |
728 | |
729 | target_beneath->to_detach (args, from_tty); | |
730 | } | |
731 | ||
5365276c DJ |
732 | static int |
733 | clear_lwpid_callback (struct thread_info *thread, void *dummy) | |
734 | { | |
735 | /* If we know that our thread implementation is 1-to-1, we could save | |
736 | a certain amount of information; it's not clear how much, so we | |
737 | are always conservative. */ | |
738 | ||
739 | thread->private->th_valid = 0; | |
740 | thread->private->ti_valid = 0; | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
fb0e1ba7 | 745 | static void |
39f77062 | 746 | thread_db_resume (ptid_t ptid, int step, enum target_signal signo) |
fb0e1ba7 | 747 | { |
39f77062 | 748 | struct cleanup *old_chain = save_inferior_ptid (); |
fb0e1ba7 | 749 | |
39f77062 KB |
750 | if (GET_PID (ptid) == -1) |
751 | inferior_ptid = lwp_from_thread (inferior_ptid); | |
752 | else if (is_thread (ptid)) | |
753 | ptid = lwp_from_thread (ptid); | |
fb0e1ba7 | 754 | |
5365276c DJ |
755 | /* Clear cached data which may not be valid after the resume. */ |
756 | iterate_over_threads (clear_lwpid_callback, NULL); | |
757 | ||
39f77062 | 758 | target_beneath->to_resume (ptid, step, signo); |
fb0e1ba7 MK |
759 | |
760 | do_cleanups (old_chain); | |
761 | } | |
762 | ||
763 | /* Check if PID is currently stopped at the location of a thread event | |
764 | breakpoint location. If it is, read the event message and act upon | |
765 | the event. */ | |
766 | ||
767 | static void | |
39f77062 | 768 | check_event (ptid_t ptid) |
fb0e1ba7 MK |
769 | { |
770 | td_event_msg_t msg; | |
771 | td_thrinfo_t ti; | |
772 | td_err_e err; | |
773 | CORE_ADDR stop_pc; | |
774 | ||
775 | /* Bail out early if we're not at a thread event breakpoint. */ | |
39f77062 | 776 | stop_pc = read_pc_pid (ptid) - DECR_PC_AFTER_BREAK; |
fb0e1ba7 MK |
777 | if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr) |
778 | return; | |
779 | ||
780 | err = td_ta_event_getmsg_p (thread_agent, &msg); | |
781 | if (err != TD_OK) | |
782 | { | |
783 | if (err == TD_NOMSG) | |
784 | return; | |
785 | ||
786 | error ("Cannot get thread event message: %s", thread_db_err_str (err)); | |
787 | } | |
788 | ||
789 | err = td_thr_get_info_p (msg.th_p, &ti); | |
790 | if (err != TD_OK) | |
3197744f MS |
791 | error ("check_event: cannot get thread info: %s", |
792 | thread_db_err_str (err)); | |
fb0e1ba7 | 793 | |
39f77062 | 794 | ptid = BUILD_THREAD (ti.ti_tid, GET_PID (ptid)); |
fb0e1ba7 MK |
795 | |
796 | switch (msg.event) | |
797 | { | |
798 | case TD_CREATE: | |
799 | #if 0 | |
800 | /* FIXME: kettenis/2000-08-26: Since we use td_ta_event_getmsg, | |
801 | there is no guarantee that the breakpoint will match the | |
802 | event. Should we use td_thr_event_getmsg instead? */ | |
803 | ||
804 | if (stop_pc != td_create_bp_addr) | |
805 | error ("Thread creation event doesn't match breakpoint."); | |
806 | #endif | |
807 | ||
540af400 MS |
808 | /* We may already know about this thread, for instance when the |
809 | user has issued the `info threads' command before the SIGTRAP | |
810 | for hitting the thread creation breakpoint was reported. */ | |
21bf60fe | 811 | if (!in_thread_list (ptid)) |
39f77062 | 812 | attach_thread (ptid, msg.th_p, &ti, 1); |
fb0e1ba7 MK |
813 | return; |
814 | ||
815 | case TD_DEATH: | |
816 | #if 0 | |
817 | /* FIXME: See TD_CREATE. */ | |
818 | ||
819 | if (stop_pc != td_death_bp_addr) | |
820 | error ("Thread death event doesn't match breakpoint."); | |
821 | #endif | |
822 | ||
21bf60fe | 823 | if (!in_thread_list (ptid)) |
fb0e1ba7 MK |
824 | error ("Spurious thread death event."); |
825 | ||
39f77062 | 826 | detach_thread (ptid, 1); |
fb0e1ba7 MK |
827 | return; |
828 | ||
829 | default: | |
830 | error ("Spurious thread event."); | |
831 | } | |
832 | } | |
833 | ||
39f77062 KB |
834 | static ptid_t |
835 | thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
fb0e1ba7 | 836 | { |
39f77062 | 837 | extern ptid_t trap_ptid; |
fb0e1ba7 | 838 | |
39f77062 KB |
839 | if (GET_PID (ptid) != -1 && is_thread (ptid)) |
840 | ptid = lwp_from_thread (ptid); | |
fb0e1ba7 | 841 | |
39f77062 | 842 | ptid = target_beneath->to_wait (ptid, ourstatus); |
fb0e1ba7 | 843 | |
bda9cb72 MK |
844 | if (proc_handle.pid == 0) |
845 | /* The current child process isn't the actual multi-threaded | |
846 | program yet, so don't try to do any special thread-specific | |
847 | post-processing and bail out early. */ | |
39f77062 | 848 | return ptid; |
bda9cb72 | 849 | |
fb0e1ba7 | 850 | if (ourstatus->kind == TARGET_WAITKIND_EXITED) |
39f77062 | 851 | return pid_to_ptid (-1); |
fb0e1ba7 MK |
852 | |
853 | if (ourstatus->kind == TARGET_WAITKIND_STOPPED | |
854 | && ourstatus->value.sig == TARGET_SIGNAL_TRAP) | |
855 | /* Check for a thread event. */ | |
39f77062 | 856 | check_event (ptid); |
fb0e1ba7 | 857 | |
39f77062 KB |
858 | if (!ptid_equal (trap_ptid, null_ptid)) |
859 | trap_ptid = thread_from_lwp (trap_ptid); | |
fb0e1ba7 | 860 | |
39f77062 | 861 | return thread_from_lwp (ptid); |
fb0e1ba7 MK |
862 | } |
863 | ||
864 | static int | |
865 | thread_db_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, | |
e5da8f38 | 866 | struct mem_attrib *attrib, |
fb0e1ba7 MK |
867 | struct target_ops *target) |
868 | { | |
39f77062 | 869 | struct cleanup *old_chain = save_inferior_ptid (); |
fb0e1ba7 MK |
870 | int xfer; |
871 | ||
39f77062 | 872 | if (is_thread (inferior_ptid)) |
fb0e1ba7 MK |
873 | { |
874 | /* FIXME: This seems to be necessary to make sure breakpoints | |
875 | are removed. */ | |
21bf60fe | 876 | if (!target_thread_alive (inferior_ptid)) |
39f77062 | 877 | inferior_ptid = pid_to_ptid (GET_PID (inferior_ptid)); |
fb0e1ba7 | 878 | else |
39f77062 | 879 | inferior_ptid = lwp_from_thread (inferior_ptid); |
fb0e1ba7 MK |
880 | } |
881 | ||
e5da8f38 | 882 | xfer = target_beneath->to_xfer_memory (memaddr, myaddr, len, write, attrib, target); |
fb0e1ba7 MK |
883 | |
884 | do_cleanups (old_chain); | |
885 | return xfer; | |
886 | } | |
887 | ||
888 | static void | |
889 | thread_db_fetch_registers (int regno) | |
890 | { | |
5365276c | 891 | struct thread_info *thread_info; |
fb0e1ba7 MK |
892 | prgregset_t gregset; |
893 | gdb_prfpregset_t fpregset; | |
894 | td_err_e err; | |
895 | ||
21bf60fe | 896 | if (!is_thread (inferior_ptid)) |
fb0e1ba7 MK |
897 | { |
898 | /* Pass the request to the target beneath us. */ | |
899 | target_beneath->to_fetch_registers (regno); | |
900 | return; | |
901 | } | |
902 | ||
5365276c DJ |
903 | thread_info = find_thread_pid (inferior_ptid); |
904 | thread_db_map_id2thr (thread_info, 1); | |
fb0e1ba7 | 905 | |
5365276c | 906 | err = td_thr_getgregs_p (&thread_info->private->th, gregset); |
fb0e1ba7 MK |
907 | if (err != TD_OK) |
908 | error ("Cannot fetch general-purpose registers for thread %ld: %s", | |
39f77062 | 909 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
fb0e1ba7 | 910 | |
5365276c | 911 | err = td_thr_getfpregs_p (&thread_info->private->th, &fpregset); |
fb0e1ba7 MK |
912 | if (err != TD_OK) |
913 | error ("Cannot get floating-point registers for thread %ld: %s", | |
39f77062 | 914 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
fb0e1ba7 MK |
915 | |
916 | /* Note that we must call supply_gregset after calling the thread_db | |
917 | routines because the thread_db routines call ps_lgetgregs and | |
918 | friends which clobber GDB's register cache. */ | |
919 | supply_gregset ((gdb_gregset_t *) gregset); | |
920 | supply_fpregset (&fpregset); | |
921 | } | |
922 | ||
923 | static void | |
924 | thread_db_store_registers (int regno) | |
925 | { | |
fb0e1ba7 MK |
926 | prgregset_t gregset; |
927 | gdb_prfpregset_t fpregset; | |
928 | td_err_e err; | |
5365276c | 929 | struct thread_info *thread_info; |
fb0e1ba7 | 930 | |
21bf60fe | 931 | if (!is_thread (inferior_ptid)) |
fb0e1ba7 MK |
932 | { |
933 | /* Pass the request to the target beneath us. */ | |
934 | target_beneath->to_store_registers (regno); | |
935 | return; | |
936 | } | |
937 | ||
5365276c DJ |
938 | thread_info = find_thread_pid (inferior_ptid); |
939 | thread_db_map_id2thr (thread_info, 1); | |
fb0e1ba7 MK |
940 | |
941 | if (regno != -1) | |
942 | { | |
943 | char raw[MAX_REGISTER_RAW_SIZE]; | |
944 | ||
4caf0990 | 945 | deprecated_read_register_gen (regno, raw); |
fb0e1ba7 MK |
946 | thread_db_fetch_registers (-1); |
947 | supply_register (regno, raw); | |
948 | } | |
949 | ||
950 | fill_gregset ((gdb_gregset_t *) gregset, -1); | |
951 | fill_fpregset (&fpregset, -1); | |
952 | ||
5365276c | 953 | err = td_thr_setgregs_p (&thread_info->private->th, gregset); |
fb0e1ba7 MK |
954 | if (err != TD_OK) |
955 | error ("Cannot store general-purpose registers for thread %ld: %s", | |
39f77062 | 956 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
5365276c | 957 | err = td_thr_setfpregs_p (&thread_info->private->th, &fpregset); |
fb0e1ba7 MK |
958 | if (err != TD_OK) |
959 | error ("Cannot store floating-point registers for thread %ld: %s", | |
39f77062 | 960 | (long) GET_THREAD (inferior_ptid), thread_db_err_str (err)); |
fb0e1ba7 MK |
961 | } |
962 | ||
963 | static void | |
964 | thread_db_kill (void) | |
965 | { | |
c194fbe1 MK |
966 | /* There's no need to save & restore inferior_ptid here, since the |
967 | inferior isn't supposed to survive this function call. */ | |
968 | inferior_ptid = lwp_from_thread (inferior_ptid); | |
fb0e1ba7 MK |
969 | target_beneath->to_kill (); |
970 | } | |
971 | ||
972 | static void | |
973 | thread_db_create_inferior (char *exec_file, char *allargs, char **env) | |
974 | { | |
21bf60fe | 975 | if (!keep_thread_db) |
c194fbe1 MK |
976 | { |
977 | unpush_target (&thread_db_ops); | |
978 | using_thread_db = 0; | |
979 | } | |
980 | ||
bda9cb72 MK |
981 | target_beneath->to_create_inferior (exec_file, allargs, env); |
982 | } | |
fb0e1ba7 | 983 | |
bda9cb72 | 984 | static void |
39f77062 | 985 | thread_db_post_startup_inferior (ptid_t ptid) |
bda9cb72 MK |
986 | { |
987 | if (proc_handle.pid == 0) | |
988 | { | |
989 | /* The child process is now the actual multi-threaded | |
990 | program. Snatch its process ID... */ | |
39f77062 | 991 | proc_handle.pid = GET_PID (ptid); |
fb0e1ba7 | 992 | |
bda9cb72 MK |
993 | /* ...and perform the remaining initialization steps. */ |
994 | enable_thread_event_reporting (); | |
21bf60fe | 995 | thread_db_find_new_threads (); |
bda9cb72 | 996 | } |
fb0e1ba7 MK |
997 | } |
998 | ||
999 | static void | |
1000 | thread_db_mourn_inferior (void) | |
1001 | { | |
1002 | remove_thread_event_breakpoints (); | |
c194fbe1 MK |
1003 | |
1004 | /* Forget about the child's process ID. We shouldn't need it | |
1005 | anymore. */ | |
1006 | proc_handle.pid = 0; | |
fb0e1ba7 MK |
1007 | |
1008 | target_beneath->to_mourn_inferior (); | |
1009 | } | |
1010 | ||
1011 | static int | |
39f77062 | 1012 | thread_db_thread_alive (ptid_t ptid) |
fb0e1ba7 | 1013 | { |
5fd913cc | 1014 | td_thrhandle_t th; |
21bf60fe | 1015 | td_err_e err; |
5fd913cc | 1016 | |
39f77062 | 1017 | if (is_thread (ptid)) |
fb0e1ba7 | 1018 | { |
5365276c DJ |
1019 | struct thread_info *thread_info; |
1020 | thread_info = find_thread_pid (ptid); | |
fb0e1ba7 | 1021 | |
5365276c DJ |
1022 | thread_db_map_id2thr (thread_info, 0); |
1023 | if (! thread_info->private->th_valid) | |
fb0e1ba7 MK |
1024 | return 0; |
1025 | ||
5365276c | 1026 | err = td_thr_validate_p (&thread_info->private->th); |
5fd913cc MS |
1027 | if (err != TD_OK) |
1028 | return 0; | |
1029 | ||
5365276c DJ |
1030 | if (! thread_info->private->ti_valid) |
1031 | { | |
1032 | err = td_thr_get_info_p (&thread_info->private->th, &thread_info->private->ti); | |
1033 | if (err != TD_OK) | |
1034 | return 0; | |
1035 | thread_info->private->ti_valid = 1; | |
1036 | } | |
1037 | ||
1038 | if (thread_info->private->ti.ti_state == TD_THR_UNKNOWN | |
1039 | || thread_info->private->ti.ti_state == TD_THR_ZOMBIE) | |
21bf60fe | 1040 | return 0; /* A zombie thread. */ |
5fd913cc | 1041 | |
fb0e1ba7 MK |
1042 | return 1; |
1043 | } | |
1044 | ||
1045 | if (target_beneath->to_thread_alive) | |
39f77062 | 1046 | return target_beneath->to_thread_alive (ptid); |
fb0e1ba7 MK |
1047 | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static int | |
1052 | find_new_threads_callback (const td_thrhandle_t *th_p, void *data) | |
1053 | { | |
1054 | td_thrinfo_t ti; | |
1055 | td_err_e err; | |
39f77062 | 1056 | ptid_t ptid; |
fb0e1ba7 MK |
1057 | |
1058 | err = td_thr_get_info_p (th_p, &ti); | |
1059 | if (err != TD_OK) | |
3197744f MS |
1060 | error ("find_new_threads_callback: cannot get thread info: %s", |
1061 | thread_db_err_str (err)); | |
fb0e1ba7 | 1062 | |
21bf60fe MK |
1063 | if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE) |
1064 | return 0; /* A zombie -- ignore. */ | |
5fd913cc | 1065 | |
39f77062 | 1066 | ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid)); |
fb0e1ba7 | 1067 | |
21bf60fe | 1068 | if (!in_thread_list (ptid)) |
39f77062 | 1069 | attach_thread (ptid, th_p, &ti, 1); |
fb0e1ba7 MK |
1070 | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static void | |
1075 | thread_db_find_new_threads (void) | |
1076 | { | |
1077 | td_err_e err; | |
1078 | ||
1079 | /* Iterate over all user-space threads to discover new threads. */ | |
1080 | err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL, | |
1081 | TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY, | |
1082 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); | |
1083 | if (err != TD_OK) | |
1084 | error ("Cannot find new threads: %s", thread_db_err_str (err)); | |
1085 | } | |
1086 | ||
1087 | static char * | |
39f77062 | 1088 | thread_db_pid_to_str (ptid_t ptid) |
fb0e1ba7 | 1089 | { |
39f77062 | 1090 | if (is_thread (ptid)) |
fb0e1ba7 MK |
1091 | { |
1092 | static char buf[64]; | |
5365276c | 1093 | td_thrinfo_t *ti_p; |
fb0e1ba7 | 1094 | td_err_e err; |
5365276c | 1095 | struct thread_info *thread_info; |
fb0e1ba7 | 1096 | |
5365276c DJ |
1097 | thread_info = find_thread_pid (ptid); |
1098 | thread_db_map_id2thr (thread_info, 0); | |
1099 | if (! thread_info->private->th_valid) | |
1100 | { | |
1101 | snprintf (buf, sizeof (buf), "Thread %ld (Missing)", GET_THREAD (ptid)); | |
1102 | return buf; | |
1103 | } | |
fb0e1ba7 | 1104 | |
5365276c | 1105 | ti_p = thread_db_get_info (thread_info); |
fb0e1ba7 | 1106 | |
5365276c | 1107 | if (ti_p->ti_state == TD_THR_ACTIVE && ti_p->ti_lid != 0) |
fb0e1ba7 MK |
1108 | { |
1109 | snprintf (buf, sizeof (buf), "Thread %ld (LWP %d)", | |
5365276c | 1110 | (long) ti_p->ti_tid, ti_p->ti_lid); |
fb0e1ba7 MK |
1111 | } |
1112 | else | |
1113 | { | |
1114 | snprintf (buf, sizeof (buf), "Thread %ld (%s)", | |
5365276c | 1115 | (long) ti_p->ti_tid, thread_db_state_str (ti_p->ti_state)); |
fb0e1ba7 MK |
1116 | } |
1117 | ||
1118 | return buf; | |
1119 | } | |
1120 | ||
39f77062 KB |
1121 | if (target_beneath->to_pid_to_str (ptid)) |
1122 | return target_beneath->to_pid_to_str (ptid); | |
fb0e1ba7 | 1123 | |
39f77062 | 1124 | return normal_pid_to_str (ptid); |
fb0e1ba7 MK |
1125 | } |
1126 | ||
3f47be5c EZ |
1127 | /* Get the address of the thread local variable in OBJFILE which is |
1128 | stored at OFFSET within the thread local storage for thread PTID. */ | |
1129 | ||
1130 | static CORE_ADDR | |
1131 | thread_db_get_thread_local_address (ptid_t ptid, struct objfile *objfile, | |
1132 | CORE_ADDR offset) | |
1133 | { | |
1134 | if (is_thread (ptid)) | |
1135 | { | |
1136 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
1137 | td_err_e err; | |
3f47be5c EZ |
1138 | void *address; |
1139 | CORE_ADDR lm; | |
5365276c | 1140 | struct thread_info *thread_info; |
3f47be5c EZ |
1141 | |
1142 | /* glibc doesn't provide the needed interface. */ | |
1143 | if (! td_thr_tls_get_addr_p) | |
1144 | error ("Cannot find thread-local variables in this thread library."); | |
1145 | ||
1146 | /* Get the address of the link map for this objfile. */ | |
1147 | lm = svr4_fetch_objfile_link_map (objfile); | |
1148 | ||
1149 | /* Whoops, we couldn't find one. Bail out. */ | |
1150 | if (!lm) | |
1151 | { | |
1152 | if (objfile_is_library) | |
1153 | error ("Cannot find shared library `%s' link_map in dynamic" | |
1154 | " linker's module list", objfile->name); | |
1155 | else | |
1156 | error ("Cannot find executable file `%s' link_map in dynamic" | |
1157 | " linker's module list", objfile->name); | |
1158 | } | |
1159 | ||
1160 | /* Get info about the thread. */ | |
5365276c DJ |
1161 | thread_info = find_thread_pid (ptid); |
1162 | thread_db_map_id2thr (thread_info, 1); | |
1163 | ||
3f47be5c | 1164 | /* Finally, get the address of the variable. */ |
5365276c DJ |
1165 | err = td_thr_tls_get_addr_p (&thread_info->private->th, (void *) lm, |
1166 | offset, &address); | |
3f47be5c EZ |
1167 | |
1168 | #ifdef THREAD_DB_HAS_TD_NOTALLOC | |
1169 | /* The memory hasn't been allocated, yet. */ | |
1170 | if (err == TD_NOTALLOC) | |
1171 | { | |
1172 | /* Now, if libthread_db provided the initialization image's | |
1173 | address, we *could* try to build a non-lvalue value from | |
1174 | the initialization image. */ | |
1175 | if (objfile_is_library) | |
1176 | error ("The inferior has not yet allocated storage for" | |
1177 | " thread-local variables in\n" | |
1178 | "the shared library `%s'\n" | |
1179 | "for the thread %ld", | |
1180 | objfile->name, (long) GET_THREAD (ptid)); | |
1181 | else | |
1182 | error ("The inferior has not yet allocated storage for" | |
1183 | " thread-local variables in\n" | |
1184 | "the executable `%s'\n" | |
1185 | "for the thread %ld", | |
1186 | objfile->name, (long) GET_THREAD (ptid)); | |
1187 | } | |
1188 | #endif | |
1189 | ||
1190 | /* Something else went wrong. */ | |
1191 | if (err != TD_OK) | |
1192 | { | |
1193 | if (objfile_is_library) | |
1194 | error ("Cannot find thread-local storage for thread %ld, " | |
1195 | "shared library %s:\n%s", | |
1196 | (long) GET_THREAD (ptid), | |
1197 | objfile->name, | |
1198 | thread_db_err_str (err)); | |
1199 | else | |
1200 | error ("Cannot find thread-local storage for thread %ld, " | |
1201 | "executable file %s:\n%s", | |
1202 | (long) GET_THREAD (ptid), | |
1203 | objfile->name, | |
1204 | thread_db_err_str (err)); | |
1205 | } | |
1206 | ||
1207 | /* Cast assuming host == target. Joy. */ | |
1208 | return (CORE_ADDR) address; | |
1209 | } | |
1210 | ||
1211 | if (target_beneath->to_get_thread_local_address) | |
1212 | return target_beneath->to_get_thread_local_address (ptid, objfile, offset); | |
1213 | ||
1214 | error ("Cannot find thread-local values on this target."); | |
1215 | } | |
1216 | ||
fb0e1ba7 MK |
1217 | static void |
1218 | init_thread_db_ops (void) | |
1219 | { | |
1220 | thread_db_ops.to_shortname = "multi-thread"; | |
1221 | thread_db_ops.to_longname = "multi-threaded child process."; | |
1222 | thread_db_ops.to_doc = "Threads and pthreads support."; | |
c194fbe1 | 1223 | thread_db_ops.to_attach = thread_db_attach; |
fb0e1ba7 MK |
1224 | thread_db_ops.to_detach = thread_db_detach; |
1225 | thread_db_ops.to_resume = thread_db_resume; | |
1226 | thread_db_ops.to_wait = thread_db_wait; | |
1227 | thread_db_ops.to_fetch_registers = thread_db_fetch_registers; | |
1228 | thread_db_ops.to_store_registers = thread_db_store_registers; | |
1229 | thread_db_ops.to_xfer_memory = thread_db_xfer_memory; | |
1230 | thread_db_ops.to_kill = thread_db_kill; | |
1231 | thread_db_ops.to_create_inferior = thread_db_create_inferior; | |
bda9cb72 | 1232 | thread_db_ops.to_post_startup_inferior = thread_db_post_startup_inferior; |
fb0e1ba7 MK |
1233 | thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior; |
1234 | thread_db_ops.to_thread_alive = thread_db_thread_alive; | |
1235 | thread_db_ops.to_find_new_threads = thread_db_find_new_threads; | |
1236 | thread_db_ops.to_pid_to_str = thread_db_pid_to_str; | |
1237 | thread_db_ops.to_stratum = thread_stratum; | |
1238 | thread_db_ops.to_has_thread_control = tc_schedlock; | |
3f47be5c EZ |
1239 | thread_db_ops.to_get_thread_local_address |
1240 | = thread_db_get_thread_local_address; | |
fb0e1ba7 MK |
1241 | thread_db_ops.to_magic = OPS_MAGIC; |
1242 | } | |
1243 | ||
1244 | void | |
1245 | _initialize_thread_db (void) | |
1246 | { | |
1247 | /* Only initialize the module if we can load libthread_db. */ | |
1248 | if (thread_db_load ()) | |
1249 | { | |
1250 | init_thread_db_ops (); | |
1251 | add_target (&thread_db_ops); | |
1252 | ||
1253 | /* Add ourselves to objfile event chain. */ | |
540af400 | 1254 | target_new_objfile_chain = target_new_objfile_hook; |
fb0e1ba7 MK |
1255 | target_new_objfile_hook = thread_db_new_objfile; |
1256 | } | |
1257 | } |