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