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