Commit | Line | Data |
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0d62e5e8 | 1 | /* Thread management interface, for the remote server for GDB. |
32d0add0 | 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
0d62e5e8 DJ |
3 | |
4 | Contributed by MontaVista Software. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
0d62e5e8 DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
0d62e5e8 DJ |
20 | |
21 | #include "server.h" | |
22 | ||
23 | #include "linux-low.h" | |
24 | ||
25 | extern int debug_threads; | |
26 | ||
24a09b5f DJ |
27 | static int thread_db_use_events; |
28 | ||
0050a760 | 29 | #include "gdb_proc_service.h" |
125f8a3d | 30 | #include "nat/gdb_thread_db.h" |
e6712ff1 | 31 | #include "gdb_vecs.h" |
2db9a427 | 32 | #include "nat/linux-procfs.h" |
0d62e5e8 | 33 | |
96f15937 | 34 | #ifndef USE_LIBTHREAD_DB_DIRECTLY |
cdbfd419 | 35 | #include <dlfcn.h> |
96f15937 | 36 | #endif |
cdbfd419 PP |
37 | #include <limits.h> |
38 | #include <ctype.h> | |
39 | ||
40 | struct thread_db | |
41 | { | |
42 | /* Structure that identifies the child process for the | |
43 | <proc_service.h> interface. */ | |
44 | struct ps_prochandle proc_handle; | |
45 | ||
46 | /* Connection to the libthread_db library. */ | |
47 | td_thragent_t *thread_agent; | |
48 | ||
9836d6ea PA |
49 | /* If this flag has been set, we've already asked GDB for all |
50 | symbols we might need; assume symbol cache misses are | |
51 | failures. */ | |
52 | int all_symbols_looked_up; | |
53 | ||
96f15937 | 54 | #ifndef USE_LIBTHREAD_DB_DIRECTLY |
cdbfd419 PP |
55 | /* Handle of the libthread_db from dlopen. */ |
56 | void *handle; | |
96f15937 | 57 | #endif |
cdbfd419 | 58 | |
f9e39928 PA |
59 | /* Thread creation event breakpoint. The code at this location in |
60 | the child process will be called by the pthread library whenever | |
61 | a new thread is created. By setting a special breakpoint at this | |
62 | location, GDB can detect when a new thread is created. We obtain | |
63 | this location via the td_ta_event_addr call. Note that if the | |
64 | running kernel supports tracing clones, then we don't need to use | |
65 | (and in fact don't use) this magic thread event breakpoint to | |
66 | learn about threads. */ | |
67 | struct breakpoint *td_create_bp; | |
68 | ||
cdbfd419 | 69 | /* Addresses of libthread_db functions. */ |
96e9210f PA |
70 | td_ta_new_ftype *td_ta_new_p; |
71 | td_ta_event_getmsg_ftype * td_ta_event_getmsg_p; | |
72 | td_ta_set_event_ftype *td_ta_set_event_p; | |
73 | td_ta_event_addr_ftype *td_ta_event_addr_p; | |
74 | td_ta_map_lwp2thr_ftype *td_ta_map_lwp2thr_p; | |
75 | td_thr_get_info_ftype *td_thr_get_info_p; | |
76 | td_thr_event_enable_ftype *td_thr_event_enable_p; | |
77 | td_ta_thr_iter_ftype *td_ta_thr_iter_p; | |
78 | td_thr_tls_get_addr_ftype *td_thr_tls_get_addr_p; | |
79 | td_thr_tlsbase_ftype *td_thr_tlsbase_p; | |
80 | td_symbol_list_ftype *td_symbol_list_p; | |
cdbfd419 PP |
81 | }; |
82 | ||
83 | static char *libthread_db_search_path; | |
186947f7 | 84 | |
95954743 | 85 | static int find_one_thread (ptid_t); |
0d62e5e8 DJ |
86 | static int find_new_threads_callback (const td_thrhandle_t *th_p, void *data); |
87 | ||
54363045 | 88 | static const char * |
0d62e5e8 DJ |
89 | thread_db_err_str (td_err_e err) |
90 | { | |
91 | static char buf[64]; | |
92 | ||
93 | switch (err) | |
94 | { | |
95 | case TD_OK: | |
96 | return "generic 'call succeeded'"; | |
97 | case TD_ERR: | |
98 | return "generic error"; | |
99 | case TD_NOTHR: | |
100 | return "no thread to satisfy query"; | |
101 | case TD_NOSV: | |
102 | return "no sync handle to satisfy query"; | |
103 | case TD_NOLWP: | |
104 | return "no LWP to satisfy query"; | |
105 | case TD_BADPH: | |
106 | return "invalid process handle"; | |
107 | case TD_BADTH: | |
108 | return "invalid thread handle"; | |
109 | case TD_BADSH: | |
110 | return "invalid synchronization handle"; | |
111 | case TD_BADTA: | |
112 | return "invalid thread agent"; | |
113 | case TD_BADKEY: | |
114 | return "invalid key"; | |
115 | case TD_NOMSG: | |
116 | return "no event message for getmsg"; | |
117 | case TD_NOFPREGS: | |
118 | return "FPU register set not available"; | |
119 | case TD_NOLIBTHREAD: | |
120 | return "application not linked with libthread"; | |
121 | case TD_NOEVENT: | |
122 | return "requested event is not supported"; | |
123 | case TD_NOCAPAB: | |
124 | return "capability not available"; | |
125 | case TD_DBERR: | |
126 | return "debugger service failed"; | |
127 | case TD_NOAPLIC: | |
128 | return "operation not applicable to"; | |
129 | case TD_NOTSD: | |
130 | return "no thread-specific data for this thread"; | |
131 | case TD_MALLOC: | |
132 | return "malloc failed"; | |
133 | case TD_PARTIALREG: | |
134 | return "only part of register set was written/read"; | |
135 | case TD_NOXREGS: | |
136 | return "X register set not available for this thread"; | |
3db0444b DJ |
137 | #ifdef HAVE_TD_VERSION |
138 | case TD_VERSION: | |
139 | return "version mismatch between libthread_db and libpthread"; | |
140 | #endif | |
0d62e5e8 | 141 | default: |
6cebaf6e | 142 | xsnprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err); |
0d62e5e8 DJ |
143 | return buf; |
144 | } | |
145 | } | |
146 | ||
147 | #if 0 | |
148 | static char * | |
149 | thread_db_state_str (td_thr_state_e state) | |
150 | { | |
151 | static char buf[64]; | |
152 | ||
153 | switch (state) | |
154 | { | |
155 | case TD_THR_STOPPED: | |
156 | return "stopped by debugger"; | |
157 | case TD_THR_RUN: | |
158 | return "runnable"; | |
159 | case TD_THR_ACTIVE: | |
160 | return "active"; | |
161 | case TD_THR_ZOMBIE: | |
162 | return "zombie"; | |
163 | case TD_THR_SLEEP: | |
164 | return "sleeping"; | |
165 | case TD_THR_STOPPED_ASLEEP: | |
166 | return "stopped by debugger AND blocked"; | |
167 | default: | |
6cebaf6e | 168 | xsnprintf (buf, sizeof (buf), "unknown thread_db state %d", state); |
0d62e5e8 DJ |
169 | return buf; |
170 | } | |
171 | } | |
172 | #endif | |
173 | ||
b65d95c5 | 174 | static int |
0d62e5e8 DJ |
175 | thread_db_create_event (CORE_ADDR where) |
176 | { | |
177 | td_event_msg_t msg; | |
178 | td_err_e err; | |
54a0b537 | 179 | struct lwp_info *lwp; |
fe978cb0 | 180 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
cdbfd419 | 181 | |
38e08fca | 182 | gdb_assert (thread_db->td_ta_event_getmsg_p != NULL); |
0d62e5e8 DJ |
183 | |
184 | if (debug_threads) | |
87ce2a04 | 185 | debug_printf ("Thread creation event.\n"); |
0d62e5e8 | 186 | |
0d62e5e8 DJ |
187 | /* FIXME: This assumes we don't get another event. |
188 | In the LinuxThreads implementation, this is safe, | |
189 | because all events come from the manager thread | |
190 | (except for its own creation, of course). */ | |
cdbfd419 | 191 | err = thread_db->td_ta_event_getmsg_p (thread_db->thread_agent, &msg); |
0d62e5e8 DJ |
192 | if (err != TD_OK) |
193 | fprintf (stderr, "thread getmsg err: %s\n", | |
194 | thread_db_err_str (err)); | |
195 | ||
4105de34 DJ |
196 | /* If we do not know about the main thread yet, this would be a good time to |
197 | find it. We need to do this to pick up the main thread before any newly | |
198 | created threads. */ | |
0bfdf32f | 199 | lwp = get_thread_lwp (current_thread); |
54a0b537 | 200 | if (lwp->thread_known == 0) |
0bfdf32f | 201 | find_one_thread (current_thread->entry.id); |
4105de34 | 202 | |
0d62e5e8 DJ |
203 | /* msg.event == TD_EVENT_CREATE */ |
204 | ||
205 | find_new_threads_callback (msg.th_p, NULL); | |
b65d95c5 DJ |
206 | |
207 | return 0; | |
0d62e5e8 DJ |
208 | } |
209 | ||
0d62e5e8 | 210 | static int |
f9e39928 | 211 | thread_db_enable_reporting (void) |
0d62e5e8 DJ |
212 | { |
213 | td_thr_events_t events; | |
214 | td_notify_t notify; | |
215 | td_err_e err; | |
fe978cb0 | 216 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
cdbfd419 PP |
217 | |
218 | if (thread_db->td_ta_set_event_p == NULL | |
219 | || thread_db->td_ta_event_addr_p == NULL | |
220 | || thread_db->td_ta_event_getmsg_p == NULL) | |
221 | /* This libthread_db is missing required support. */ | |
222 | return 0; | |
0d62e5e8 DJ |
223 | |
224 | /* Set the process wide mask saying which events we're interested in. */ | |
225 | td_event_emptyset (&events); | |
226 | td_event_addset (&events, TD_CREATE); | |
227 | ||
cdbfd419 | 228 | err = thread_db->td_ta_set_event_p (thread_db->thread_agent, &events); |
0d62e5e8 DJ |
229 | if (err != TD_OK) |
230 | { | |
231 | warning ("Unable to set global thread event mask: %s", | |
1b3f6016 | 232 | thread_db_err_str (err)); |
0d62e5e8 DJ |
233 | return 0; |
234 | } | |
235 | ||
236 | /* Get address for thread creation breakpoint. */ | |
cdbfd419 PP |
237 | err = thread_db->td_ta_event_addr_p (thread_db->thread_agent, TD_CREATE, |
238 | ¬ify); | |
0d62e5e8 DJ |
239 | if (err != TD_OK) |
240 | { | |
241 | warning ("Unable to get location for thread creation breakpoint: %s", | |
242 | thread_db_err_str (err)); | |
243 | return 0; | |
244 | } | |
f9e39928 PA |
245 | thread_db->td_create_bp |
246 | = set_breakpoint_at ((CORE_ADDR) (unsigned long) notify.u.bptaddr, | |
247 | thread_db_create_event); | |
0d62e5e8 | 248 | |
0d62e5e8 DJ |
249 | return 1; |
250 | } | |
251 | ||
ae13219e | 252 | static int |
95954743 | 253 | find_one_thread (ptid_t ptid) |
0d62e5e8 | 254 | { |
ae13219e DJ |
255 | td_thrhandle_t th; |
256 | td_thrinfo_t ti; | |
0d62e5e8 DJ |
257 | td_err_e err; |
258 | struct thread_info *inferior; | |
54a0b537 | 259 | struct lwp_info *lwp; |
fe978cb0 | 260 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
95954743 | 261 | int lwpid = ptid_get_lwp (ptid); |
0d62e5e8 | 262 | |
95954743 | 263 | inferior = (struct thread_info *) find_inferior_id (&all_threads, ptid); |
54a0b537 PA |
264 | lwp = get_thread_lwp (inferior); |
265 | if (lwp->thread_known) | |
ae13219e DJ |
266 | return 1; |
267 | ||
24a09b5f | 268 | /* Get information about this thread. */ |
cdbfd419 | 269 | err = thread_db->td_ta_map_lwp2thr_p (thread_db->thread_agent, lwpid, &th); |
ae13219e | 270 | if (err != TD_OK) |
24a09b5f DJ |
271 | error ("Cannot get thread handle for LWP %d: %s", |
272 | lwpid, thread_db_err_str (err)); | |
ae13219e | 273 | |
cdbfd419 | 274 | err = thread_db->td_thr_get_info_p (&th, &ti); |
ae13219e | 275 | if (err != TD_OK) |
24a09b5f DJ |
276 | error ("Cannot get thread info for LWP %d: %s", |
277 | lwpid, thread_db_err_str (err)); | |
ae13219e DJ |
278 | |
279 | if (debug_threads) | |
87ce2a04 | 280 | debug_printf ("Found thread %ld (LWP %d)\n", |
d41401ac | 281 | (unsigned long) ti.ti_tid, ti.ti_lid); |
ae13219e | 282 | |
95954743 | 283 | if (lwpid != ti.ti_lid) |
24a09b5f DJ |
284 | { |
285 | warning ("PID mismatch! Expected %ld, got %ld", | |
95954743 | 286 | (long) lwpid, (long) ti.ti_lid); |
24a09b5f DJ |
287 | return 0; |
288 | } | |
ae13219e | 289 | |
24a09b5f | 290 | if (thread_db_use_events) |
0d62e5e8 | 291 | { |
cdbfd419 | 292 | err = thread_db->td_thr_event_enable_p (&th, 1); |
ae13219e DJ |
293 | if (err != TD_OK) |
294 | error ("Cannot enable thread event reporting for %d: %s", | |
295 | ti.ti_lid, thread_db_err_str (err)); | |
0d62e5e8 | 296 | } |
ae13219e | 297 | |
24a09b5f DJ |
298 | /* If the new thread ID is zero, a final thread ID will be available |
299 | later. Do not enable thread debugging yet. */ | |
300 | if (ti.ti_tid == 0) | |
301 | return 0; | |
ae13219e | 302 | |
54a0b537 PA |
303 | lwp->thread_known = 1; |
304 | lwp->th = th; | |
ae13219e | 305 | |
ae13219e DJ |
306 | return 1; |
307 | } | |
308 | ||
5f7d1694 PP |
309 | /* Attach a thread. Return true on success. */ |
310 | ||
311 | static int | |
312 | attach_thread (const td_thrhandle_t *th_p, td_thrinfo_t *ti_p) | |
ae13219e | 313 | { |
7ae1a6a6 PA |
314 | struct process_info *proc = current_process (); |
315 | int pid = pid_of (proc); | |
316 | ptid_t ptid = ptid_build (pid, ti_p->ti_lid, 0); | |
54a0b537 | 317 | struct lwp_info *lwp; |
7ae1a6a6 | 318 | int err; |
ae13219e | 319 | |
0d62e5e8 | 320 | if (debug_threads) |
87ce2a04 | 321 | debug_printf ("Attaching to thread %ld (LWP %d)\n", |
d41401ac | 322 | (unsigned long) ti_p->ti_tid, ti_p->ti_lid); |
7ae1a6a6 PA |
323 | err = linux_attach_lwp (ptid); |
324 | if (err != 0) | |
0d62e5e8 | 325 | { |
7ae1a6a6 | 326 | warning ("Could not attach to thread %ld (LWP %d): %s\n", |
d41401ac | 327 | (unsigned long) ti_p->ti_tid, ti_p->ti_lid, |
8784d563 | 328 | linux_ptrace_attach_fail_reason_string (ptid, err)); |
5f7d1694 | 329 | return 0; |
0d62e5e8 DJ |
330 | } |
331 | ||
7ae1a6a6 PA |
332 | lwp = find_lwp_pid (ptid); |
333 | gdb_assert (lwp != NULL); | |
54a0b537 PA |
334 | lwp->thread_known = 1; |
335 | lwp->th = *th_p; | |
24a09b5f DJ |
336 | |
337 | if (thread_db_use_events) | |
338 | { | |
5f7d1694 | 339 | td_err_e err; |
fe978cb0 | 340 | struct thread_db *thread_db = proc->priv->thread_db; |
5f7d1694 | 341 | |
cdbfd419 | 342 | err = thread_db->td_thr_event_enable_p (th_p, 1); |
24a09b5f DJ |
343 | if (err != TD_OK) |
344 | error ("Cannot enable thread event reporting for %d: %s", | |
345 | ti_p->ti_lid, thread_db_err_str (err)); | |
346 | } | |
5f7d1694 PP |
347 | |
348 | return 1; | |
349 | } | |
350 | ||
351 | /* Attach thread if we haven't seen it yet. | |
352 | Increment *COUNTER if we have attached a new thread. | |
353 | Return false on failure. */ | |
354 | ||
355 | static int | |
356 | maybe_attach_thread (const td_thrhandle_t *th_p, td_thrinfo_t *ti_p, | |
357 | int *counter) | |
358 | { | |
359 | struct lwp_info *lwp; | |
360 | ||
361 | lwp = find_lwp_pid (pid_to_ptid (ti_p->ti_lid)); | |
362 | if (lwp != NULL) | |
363 | return 1; | |
364 | ||
365 | if (!attach_thread (th_p, ti_p)) | |
366 | return 0; | |
367 | ||
368 | if (counter != NULL) | |
369 | *counter += 1; | |
370 | ||
371 | return 1; | |
0d62e5e8 DJ |
372 | } |
373 | ||
374 | static int | |
375 | find_new_threads_callback (const td_thrhandle_t *th_p, void *data) | |
376 | { | |
377 | td_thrinfo_t ti; | |
378 | td_err_e err; | |
fe978cb0 | 379 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
0d62e5e8 | 380 | |
cdbfd419 | 381 | err = thread_db->td_thr_get_info_p (th_p, &ti); |
0d62e5e8 DJ |
382 | if (err != TD_OK) |
383 | error ("Cannot get thread info: %s", thread_db_err_str (err)); | |
384 | ||
a33e3959 PA |
385 | if (ti.ti_lid == -1) |
386 | { | |
387 | /* A thread with kernel thread ID -1 is either a thread that | |
388 | exited and was joined, or a thread that is being created but | |
389 | hasn't started yet, and that is reusing the tcb/stack of a | |
390 | thread that previously exited and was joined. (glibc marks | |
391 | terminated and joined threads with kernel thread ID -1. See | |
392 | glibc PR17707. */ | |
d6c146e9 PA |
393 | if (debug_threads) |
394 | debug_printf ("thread_db: skipping exited and " | |
d41401ac DE |
395 | "joined thread (0x%lx)\n", |
396 | (unsigned long) ti.ti_tid); | |
a33e3959 PA |
397 | return 0; |
398 | } | |
399 | ||
0d62e5e8 DJ |
400 | /* Check for zombies. */ |
401 | if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE) | |
402 | return 0; | |
403 | ||
5f7d1694 PP |
404 | if (!maybe_attach_thread (th_p, &ti, (int *) data)) |
405 | { | |
406 | /* Terminate iteration early: we might be looking at stale data in | |
407 | the inferior. The thread_db_find_new_threads will retry. */ | |
408 | return 1; | |
409 | } | |
0d62e5e8 DJ |
410 | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static void | |
415 | thread_db_find_new_threads (void) | |
416 | { | |
417 | td_err_e err; | |
fbd5db48 | 418 | ptid_t ptid = current_ptid; |
fe978cb0 | 419 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
5f7d1694 | 420 | int loop, iteration; |
0d62e5e8 | 421 | |
ae13219e DJ |
422 | /* This function is only called when we first initialize thread_db. |
423 | First locate the initial thread. If it is not ready for | |
424 | debugging yet, then stop. */ | |
95954743 | 425 | if (find_one_thread (ptid) == 0) |
ae13219e DJ |
426 | return; |
427 | ||
5f7d1694 PP |
428 | /* Require 4 successive iterations which do not find any new threads. |
429 | The 4 is a heuristic: there is an inherent race here, and I have | |
430 | seen that 2 iterations in a row are not always sufficient to | |
431 | "capture" all threads. */ | |
432 | for (loop = 0, iteration = 0; loop < 4; ++loop, ++iteration) | |
433 | { | |
434 | int new_thread_count = 0; | |
435 | ||
436 | /* Iterate over all user-space threads to discover new threads. */ | |
437 | err = thread_db->td_ta_thr_iter_p (thread_db->thread_agent, | |
438 | find_new_threads_callback, | |
439 | &new_thread_count, | |
493e2a69 MS |
440 | TD_THR_ANY_STATE, |
441 | TD_THR_LOWEST_PRIORITY, | |
5f7d1694 PP |
442 | TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS); |
443 | if (debug_threads) | |
87ce2a04 DE |
444 | debug_printf ("Found %d threads in iteration %d.\n", |
445 | new_thread_count, iteration); | |
5f7d1694 PP |
446 | |
447 | if (new_thread_count != 0) | |
448 | { | |
449 | /* Found new threads. Restart iteration from beginning. */ | |
450 | loop = -1; | |
451 | } | |
452 | } | |
0d62e5e8 DJ |
453 | if (err != TD_OK) |
454 | error ("Cannot find new threads: %s", thread_db_err_str (err)); | |
455 | } | |
456 | ||
fd500816 DJ |
457 | /* Cache all future symbols that thread_db might request. We can not |
458 | request symbols at arbitrary states in the remote protocol, only | |
459 | when the client tells us that new symbols are available. So when | |
460 | we load the thread library, make sure to check the entire list. */ | |
461 | ||
462 | static void | |
463 | thread_db_look_up_symbols (void) | |
464 | { | |
fe978cb0 | 465 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
cdbfd419 | 466 | const char **sym_list; |
fd500816 DJ |
467 | CORE_ADDR unused; |
468 | ||
cdbfd419 | 469 | for (sym_list = thread_db->td_symbol_list_p (); *sym_list; sym_list++) |
9836d6ea PA |
470 | look_up_one_symbol (*sym_list, &unused, 1); |
471 | ||
472 | /* We're not interested in any other libraries loaded after this | |
473 | point, only in symbols in libpthread.so. */ | |
474 | thread_db->all_symbols_looked_up = 1; | |
475 | } | |
476 | ||
477 | int | |
478 | thread_db_look_up_one_symbol (const char *name, CORE_ADDR *addrp) | |
479 | { | |
fe978cb0 | 480 | struct thread_db *thread_db = current_process ()->priv->thread_db; |
9836d6ea PA |
481 | int may_ask_gdb = !thread_db->all_symbols_looked_up; |
482 | ||
483 | /* If we've passed the call to thread_db_look_up_symbols, then | |
484 | anything not in the cache must not exist; we're not interested | |
485 | in any libraries loaded after that point, only in symbols in | |
486 | libpthread.so. It might not be an appropriate time to look | |
487 | up a symbol, e.g. while we're trying to fetch registers. */ | |
488 | return look_up_one_symbol (name, addrp, may_ask_gdb); | |
fd500816 DJ |
489 | } |
490 | ||
dae5f5cf DJ |
491 | int |
492 | thread_db_get_tls_address (struct thread_info *thread, CORE_ADDR offset, | |
493 | CORE_ADDR load_module, CORE_ADDR *address) | |
494 | { | |
dae5f5cf DJ |
495 | psaddr_t addr; |
496 | td_err_e err; | |
54a0b537 | 497 | struct lwp_info *lwp; |
0bfdf32f | 498 | struct thread_info *saved_thread; |
cdbfd419 PP |
499 | struct process_info *proc; |
500 | struct thread_db *thread_db; | |
501 | ||
502 | proc = get_thread_process (thread); | |
fe978cb0 | 503 | thread_db = proc->priv->thread_db; |
dae5f5cf | 504 | |
7fe519cb | 505 | /* If the thread layer is not (yet) initialized, fail. */ |
8a4ac37e | 506 | if (thread_db == NULL || !thread_db->all_symbols_looked_up) |
7fe519cb UW |
507 | return TD_ERR; |
508 | ||
5876f503 JK |
509 | /* If td_thr_tls_get_addr is missing rather do not expect td_thr_tlsbase |
510 | could work. */ | |
511 | if (thread_db->td_thr_tls_get_addr_p == NULL | |
512 | || (load_module == 0 && thread_db->td_thr_tlsbase_p == NULL)) | |
cdbfd419 PP |
513 | return -1; |
514 | ||
54a0b537 PA |
515 | lwp = get_thread_lwp (thread); |
516 | if (!lwp->thread_known) | |
80894984 | 517 | find_one_thread (thread->entry.id); |
54a0b537 | 518 | if (!lwp->thread_known) |
dae5f5cf DJ |
519 | return TD_NOTHR; |
520 | ||
0bfdf32f GB |
521 | saved_thread = current_thread; |
522 | current_thread = thread; | |
5876f503 JK |
523 | |
524 | if (load_module != 0) | |
525 | { | |
526 | /* Note the cast through uintptr_t: this interface only works if | |
527 | a target address fits in a psaddr_t, which is a host pointer. | |
528 | So a 32-bit debugger can not access 64-bit TLS through this. */ | |
529 | err = thread_db->td_thr_tls_get_addr_p (&lwp->th, | |
530 | (psaddr_t) (uintptr_t) load_module, | |
531 | offset, &addr); | |
532 | } | |
533 | else | |
534 | { | |
535 | /* This code path handles the case of -static -pthread executables: | |
536 | https://sourceware.org/ml/libc-help/2014-03/msg00024.html | |
537 | For older GNU libc r_debug.r_map is NULL. For GNU libc after | |
538 | PR libc/16831 due to GDB PR threads/16954 LOAD_MODULE is also NULL. | |
539 | The constant number 1 depends on GNU __libc_setup_tls | |
540 | initialization of l_tls_modid to 1. */ | |
541 | err = thread_db->td_thr_tlsbase_p (&lwp->th, 1, &addr); | |
542 | addr = (char *) addr + offset; | |
543 | } | |
544 | ||
0bfdf32f | 545 | current_thread = saved_thread; |
dae5f5cf DJ |
546 | if (err == TD_OK) |
547 | { | |
186947f7 | 548 | *address = (CORE_ADDR) (uintptr_t) addr; |
dae5f5cf DJ |
549 | return 0; |
550 | } | |
551 | else | |
552 | return err; | |
cdbfd419 PP |
553 | } |
554 | ||
96f15937 PP |
555 | #ifdef USE_LIBTHREAD_DB_DIRECTLY |
556 | ||
557 | static int | |
558 | thread_db_load_search (void) | |
559 | { | |
560 | td_err_e err; | |
9836d6ea | 561 | struct thread_db *tdb; |
96f15937 PP |
562 | struct process_info *proc = current_process (); |
563 | ||
fe978cb0 | 564 | gdb_assert (proc->priv->thread_db == NULL); |
96f15937 | 565 | |
8d749320 | 566 | tdb = XCNEW (struct thread_db); |
fe978cb0 | 567 | proc->priv->thread_db = tdb; |
f9e39928 | 568 | |
9836d6ea | 569 | tdb->td_ta_new_p = &td_ta_new; |
96f15937 PP |
570 | |
571 | /* Attempt to open a connection to the thread library. */ | |
9836d6ea | 572 | err = tdb->td_ta_new_p (&tdb->proc_handle, &tdb->thread_agent); |
96f15937 PP |
573 | if (err != TD_OK) |
574 | { | |
575 | if (debug_threads) | |
87ce2a04 | 576 | debug_printf ("td_ta_new(): %s\n", thread_db_err_str (err)); |
9836d6ea | 577 | free (tdb); |
fe978cb0 | 578 | proc->priv->thread_db = NULL; |
96f15937 PP |
579 | return 0; |
580 | } | |
581 | ||
9836d6ea PA |
582 | tdb->td_ta_map_lwp2thr_p = &td_ta_map_lwp2thr; |
583 | tdb->td_thr_get_info_p = &td_thr_get_info; | |
584 | tdb->td_ta_thr_iter_p = &td_ta_thr_iter; | |
585 | tdb->td_symbol_list_p = &td_symbol_list; | |
96f15937 PP |
586 | |
587 | /* This is required only when thread_db_use_events is on. */ | |
9836d6ea | 588 | tdb->td_thr_event_enable_p = &td_thr_event_enable; |
96f15937 PP |
589 | |
590 | /* These are not essential. */ | |
9836d6ea PA |
591 | tdb->td_ta_event_addr_p = &td_ta_event_addr; |
592 | tdb->td_ta_set_event_p = &td_ta_set_event; | |
593 | tdb->td_ta_event_getmsg_p = &td_ta_event_getmsg; | |
594 | tdb->td_thr_tls_get_addr_p = &td_thr_tls_get_addr; | |
5876f503 | 595 | tdb->td_thr_tlsbase_p = &td_thr_tlsbase; |
96f15937 PP |
596 | |
597 | return 1; | |
598 | } | |
599 | ||
600 | #else | |
601 | ||
cdbfd419 PP |
602 | static int |
603 | try_thread_db_load_1 (void *handle) | |
604 | { | |
605 | td_err_e err; | |
9836d6ea | 606 | struct thread_db *tdb; |
cdbfd419 PP |
607 | struct process_info *proc = current_process (); |
608 | ||
fe978cb0 | 609 | gdb_assert (proc->priv->thread_db == NULL); |
cdbfd419 | 610 | |
8d749320 | 611 | tdb = XCNEW (struct thread_db); |
fe978cb0 | 612 | proc->priv->thread_db = tdb; |
f9e39928 | 613 | |
9836d6ea | 614 | tdb->handle = handle; |
cdbfd419 PP |
615 | |
616 | /* Initialize pointers to the dynamic library functions we will use. | |
617 | Essential functions first. */ | |
618 | ||
619 | #define CHK(required, a) \ | |
620 | do \ | |
621 | { \ | |
622 | if ((a) == NULL) \ | |
623 | { \ | |
624 | if (debug_threads) \ | |
87ce2a04 | 625 | debug_printf ("dlsym: %s\n", dlerror ()); \ |
cdbfd419 | 626 | if (required) \ |
9836d6ea PA |
627 | { \ |
628 | free (tdb); \ | |
fe978cb0 | 629 | proc->priv->thread_db = NULL; \ |
9836d6ea PA |
630 | return 0; \ |
631 | } \ | |
cdbfd419 PP |
632 | } \ |
633 | } \ | |
634 | while (0) | |
635 | ||
96e9210f PA |
636 | #define TDB_DLSYM(tdb, func) \ |
637 | tdb->func ## _p = (func ## _ftype *) dlsym (tdb->handle, #func) | |
638 | ||
639 | CHK (1, TDB_DLSYM (tdb, td_ta_new)); | |
cdbfd419 PP |
640 | |
641 | /* Attempt to open a connection to the thread library. */ | |
9836d6ea | 642 | err = tdb->td_ta_new_p (&tdb->proc_handle, &tdb->thread_agent); |
cdbfd419 PP |
643 | if (err != TD_OK) |
644 | { | |
645 | if (debug_threads) | |
87ce2a04 | 646 | debug_printf ("td_ta_new(): %s\n", thread_db_err_str (err)); |
9836d6ea | 647 | free (tdb); |
fe978cb0 | 648 | proc->priv->thread_db = NULL; |
cdbfd419 PP |
649 | return 0; |
650 | } | |
651 | ||
96e9210f PA |
652 | CHK (1, TDB_DLSYM (tdb, td_ta_map_lwp2thr)); |
653 | CHK (1, TDB_DLSYM (tdb, td_thr_get_info)); | |
654 | CHK (1, TDB_DLSYM (tdb, td_ta_thr_iter)); | |
655 | CHK (1, TDB_DLSYM (tdb, td_symbol_list)); | |
cdbfd419 PP |
656 | |
657 | /* This is required only when thread_db_use_events is on. */ | |
96e9210f | 658 | CHK (thread_db_use_events, TDB_DLSYM (tdb, td_thr_event_enable)); |
cdbfd419 PP |
659 | |
660 | /* These are not essential. */ | |
96e9210f PA |
661 | CHK (0, TDB_DLSYM (tdb, td_ta_event_addr)); |
662 | CHK (0, TDB_DLSYM (tdb, td_ta_set_event)); | |
663 | CHK (0, TDB_DLSYM (tdb, td_ta_event_getmsg)); | |
664 | CHK (0, TDB_DLSYM (tdb, td_thr_tls_get_addr)); | |
665 | CHK (0, TDB_DLSYM (tdb, td_thr_tlsbase)); | |
cdbfd419 PP |
666 | |
667 | #undef CHK | |
96e9210f | 668 | #undef TDB_DLSYM |
cdbfd419 | 669 | |
cdbfd419 PP |
670 | return 1; |
671 | } | |
672 | ||
10e86dd7 DE |
673 | #ifdef HAVE_DLADDR |
674 | ||
cdbfd419 PP |
675 | /* Lookup a library in which given symbol resides. |
676 | Note: this is looking in the GDBSERVER process, not in the inferior. | |
677 | Returns library name, or NULL. */ | |
678 | ||
679 | static const char * | |
680 | dladdr_to_soname (const void *addr) | |
681 | { | |
682 | Dl_info info; | |
683 | ||
684 | if (dladdr (addr, &info) != 0) | |
685 | return info.dli_fname; | |
686 | return NULL; | |
687 | } | |
688 | ||
10e86dd7 DE |
689 | #endif |
690 | ||
cdbfd419 PP |
691 | static int |
692 | try_thread_db_load (const char *library) | |
693 | { | |
694 | void *handle; | |
695 | ||
696 | if (debug_threads) | |
87ce2a04 DE |
697 | debug_printf ("Trying host libthread_db library: %s.\n", |
698 | library); | |
cdbfd419 PP |
699 | handle = dlopen (library, RTLD_NOW); |
700 | if (handle == NULL) | |
701 | { | |
702 | if (debug_threads) | |
87ce2a04 | 703 | debug_printf ("dlopen failed: %s.\n", dlerror ()); |
cdbfd419 PP |
704 | return 0; |
705 | } | |
706 | ||
10e86dd7 | 707 | #ifdef HAVE_DLADDR |
cdbfd419 PP |
708 | if (debug_threads && strchr (library, '/') == NULL) |
709 | { | |
710 | void *td_init; | |
711 | ||
712 | td_init = dlsym (handle, "td_init"); | |
713 | if (td_init != NULL) | |
714 | { | |
715 | const char *const libpath = dladdr_to_soname (td_init); | |
716 | ||
717 | if (libpath != NULL) | |
718 | fprintf (stderr, "Host %s resolved to: %s.\n", | |
719 | library, libpath); | |
720 | } | |
721 | } | |
10e86dd7 | 722 | #endif |
cdbfd419 PP |
723 | |
724 | if (try_thread_db_load_1 (handle)) | |
725 | return 1; | |
726 | ||
727 | /* This library "refused" to work on current inferior. */ | |
728 | dlclose (handle); | |
729 | return 0; | |
730 | } | |
731 | ||
98a5dd13 DE |
732 | /* Handle $sdir in libthread-db-search-path. |
733 | Look for libthread_db in the system dirs, or wherever a plain | |
734 | dlopen(file_without_path) will look. | |
735 | The result is true for success. */ | |
736 | ||
cdbfd419 | 737 | static int |
98a5dd13 DE |
738 | try_thread_db_load_from_sdir (void) |
739 | { | |
740 | return try_thread_db_load (LIBTHREAD_DB_SO); | |
741 | } | |
742 | ||
743 | /* Try to load libthread_db from directory DIR of length DIR_LEN. | |
744 | The result is true for success. */ | |
745 | ||
746 | static int | |
747 | try_thread_db_load_from_dir (const char *dir, size_t dir_len) | |
cdbfd419 PP |
748 | { |
749 | char path[PATH_MAX]; | |
98a5dd13 DE |
750 | |
751 | if (dir_len + 1 + strlen (LIBTHREAD_DB_SO) + 1 > sizeof (path)) | |
752 | { | |
224c3ddb | 753 | char *cp = (char *) xmalloc (dir_len + 1); |
98a5dd13 DE |
754 | |
755 | memcpy (cp, dir, dir_len); | |
756 | cp[dir_len] = '\0'; | |
757 | warning (_("libthread-db-search-path component too long," | |
758 | " ignored: %s."), cp); | |
759 | free (cp); | |
760 | return 0; | |
761 | } | |
762 | ||
763 | memcpy (path, dir, dir_len); | |
764 | path[dir_len] = '/'; | |
765 | strcpy (path + dir_len + 1, LIBTHREAD_DB_SO); | |
766 | return try_thread_db_load (path); | |
767 | } | |
768 | ||
769 | /* Search libthread_db_search_path for libthread_db which "agrees" | |
770 | to work on current inferior. | |
771 | The result is true for success. */ | |
772 | ||
773 | static int | |
774 | thread_db_load_search (void) | |
775 | { | |
e6712ff1 DE |
776 | VEC (char_ptr) *dir_vec; |
777 | char *this_dir; | |
778 | int i, rc = 0; | |
cdbfd419 PP |
779 | |
780 | if (libthread_db_search_path == NULL) | |
781 | libthread_db_search_path = xstrdup (LIBTHREAD_DB_SEARCH_PATH); | |
782 | ||
e6712ff1 DE |
783 | dir_vec = dirnames_to_char_ptr_vec (libthread_db_search_path); |
784 | ||
785 | for (i = 0; VEC_iterate (char_ptr, dir_vec, i, this_dir); ++i) | |
cdbfd419 | 786 | { |
e6712ff1 | 787 | const int pdir_len = sizeof ("$pdir") - 1; |
98a5dd13 DE |
788 | size_t this_dir_len; |
789 | ||
e6712ff1 | 790 | this_dir_len = strlen (this_dir); |
cdbfd419 | 791 | |
e6712ff1 DE |
792 | if (strncmp (this_dir, "$pdir", pdir_len) == 0 |
793 | && (this_dir[pdir_len] == '\0' | |
794 | || this_dir[pdir_len] == '/')) | |
98a5dd13 DE |
795 | { |
796 | /* We don't maintain a list of loaded libraries so we don't know | |
797 | where libpthread lives. We *could* fetch the info, but we don't | |
798 | do that yet. Ignore it. */ | |
799 | } | |
e6712ff1 | 800 | else if (strcmp (this_dir, "$sdir") == 0) |
98a5dd13 DE |
801 | { |
802 | if (try_thread_db_load_from_sdir ()) | |
cdbfd419 | 803 | { |
98a5dd13 | 804 | rc = 1; |
cdbfd419 PP |
805 | break; |
806 | } | |
cdbfd419 | 807 | } |
98a5dd13 | 808 | else |
cdbfd419 | 809 | { |
98a5dd13 DE |
810 | if (try_thread_db_load_from_dir (this_dir, this_dir_len)) |
811 | { | |
812 | rc = 1; | |
813 | break; | |
814 | } | |
cdbfd419 PP |
815 | } |
816 | } | |
cdbfd419 | 817 | |
e6712ff1 | 818 | free_char_ptr_vec (dir_vec); |
cdbfd419 | 819 | if (debug_threads) |
87ce2a04 | 820 | debug_printf ("thread_db_load_search returning %d\n", rc); |
cdbfd419 | 821 | return rc; |
dae5f5cf DJ |
822 | } |
823 | ||
96f15937 PP |
824 | #endif /* USE_LIBTHREAD_DB_DIRECTLY */ |
825 | ||
0d62e5e8 | 826 | int |
24a09b5f | 827 | thread_db_init (int use_events) |
0d62e5e8 | 828 | { |
95954743 | 829 | struct process_info *proc = current_process (); |
0d62e5e8 | 830 | |
fd500816 DJ |
831 | /* FIXME drow/2004-10-16: This is the "overall process ID", which |
832 | GNU/Linux calls tgid, "thread group ID". When we support | |
833 | attaching to threads, the original thread may not be the correct | |
834 | thread. We would have to get the process ID from /proc for NPTL. | |
835 | For LinuxThreads we could do something similar: follow the chain | |
836 | of parent processes until we find the highest one we're attached | |
837 | to, and use its tgid. | |
838 | ||
839 | This isn't the only place in gdbserver that assumes that the first | |
840 | process in the list is the thread group leader. */ | |
ea025f5f | 841 | |
24a09b5f DJ |
842 | thread_db_use_events = use_events; |
843 | ||
cdbfd419 | 844 | if (thread_db_load_search ()) |
0d62e5e8 | 845 | { |
24a09b5f | 846 | if (use_events && thread_db_enable_reporting () == 0) |
cdbfd419 PP |
847 | { |
848 | /* Keep trying; maybe event reporting will work later. */ | |
8336d594 | 849 | thread_db_mourn (proc); |
cdbfd419 PP |
850 | return 0; |
851 | } | |
2db9a427 PA |
852 | |
853 | /* It's best to avoid td_ta_thr_iter if possible. That walks | |
854 | data structures in the inferior's address space that may be | |
855 | corrupted, or, if the target is running, the list may change | |
856 | while we walk it. In the latter case, it's possible that a | |
857 | thread exits just at the exact time that causes GDBserver to | |
858 | get stuck in an infinite loop. If the kernel supports clone | |
859 | events, and /proc/PID/task/ exits, then we already know about | |
860 | all threads in the process. When we need info out of | |
861 | thread_db on a given thread (e.g., for TLS), we'll use | |
862 | find_one_thread then. That uses thread_db entry points that | |
863 | do not walk libpthread's thread list, so should be safe, as | |
864 | well as more efficient. */ | |
865 | if (use_events | |
866 | || !linux_proc_task_list_dir_exists (pid_of (proc))) | |
867 | thread_db_find_new_threads (); | |
fd500816 | 868 | thread_db_look_up_symbols (); |
0d62e5e8 | 869 | return 1; |
cdbfd419 | 870 | } |
0d62e5e8 | 871 | |
cdbfd419 PP |
872 | return 0; |
873 | } | |
874 | ||
ca5c370d PA |
875 | static int |
876 | any_thread_of (struct inferior_list_entry *entry, void *args) | |
877 | { | |
9a3c8263 | 878 | int *pid_p = (int *) args; |
ca5c370d PA |
879 | |
880 | if (ptid_get_pid (entry->id) == *pid_p) | |
881 | return 1; | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
f9e39928 PA |
886 | static void |
887 | switch_to_process (struct process_info *proc) | |
888 | { | |
889 | int pid = pid_of (proc); | |
890 | ||
0bfdf32f | 891 | current_thread = |
f9e39928 PA |
892 | (struct thread_info *) find_inferior (&all_threads, |
893 | any_thread_of, &pid); | |
894 | } | |
895 | ||
cdbfd419 PP |
896 | /* Disconnect from libthread_db and free resources. */ |
897 | ||
8336d594 PA |
898 | static void |
899 | disable_thread_event_reporting (struct process_info *proc) | |
cdbfd419 | 900 | { |
fe978cb0 | 901 | struct thread_db *thread_db = proc->priv->thread_db; |
cdbfd419 PP |
902 | if (thread_db) |
903 | { | |
21e1bee4 PP |
904 | td_err_e (*td_ta_clear_event_p) (const td_thragent_t *ta, |
905 | td_thr_events_t *event); | |
906 | ||
fd7dd3e6 | 907 | #ifndef USE_LIBTHREAD_DB_DIRECTLY |
96e9210f PA |
908 | td_ta_clear_event_p |
909 | = (td_ta_clear_event_ftype *) dlsym (thread_db->handle, | |
910 | "td_ta_clear_event"); | |
fd7dd3e6 | 911 | #else |
fd7dd3e6 PA |
912 | td_ta_clear_event_p = &td_ta_clear_event; |
913 | #endif | |
914 | ||
8336d594 | 915 | if (td_ta_clear_event_p != NULL) |
21e1bee4 | 916 | { |
0bfdf32f | 917 | struct thread_info *saved_thread = current_thread; |
21e1bee4 | 918 | td_thr_events_t events; |
8336d594 | 919 | |
f9e39928 | 920 | switch_to_process (proc); |
21e1bee4 | 921 | |
fd7dd3e6 PA |
922 | /* Set the process wide mask saying we aren't interested |
923 | in any events anymore. */ | |
21e1bee4 PP |
924 | td_event_fillset (&events); |
925 | (*td_ta_clear_event_p) (thread_db->thread_agent, &events); | |
8336d594 | 926 | |
0bfdf32f | 927 | current_thread = saved_thread; |
21e1bee4 | 928 | } |
8336d594 PA |
929 | } |
930 | } | |
931 | ||
f9e39928 PA |
932 | static void |
933 | remove_thread_event_breakpoints (struct process_info *proc) | |
934 | { | |
fe978cb0 | 935 | struct thread_db *thread_db = proc->priv->thread_db; |
f9e39928 PA |
936 | |
937 | if (thread_db->td_create_bp != NULL) | |
938 | { | |
0bfdf32f | 939 | struct thread_info *saved_thread = current_thread; |
f9e39928 PA |
940 | |
941 | switch_to_process (proc); | |
942 | ||
943 | delete_breakpoint (thread_db->td_create_bp); | |
944 | thread_db->td_create_bp = NULL; | |
945 | ||
0bfdf32f | 946 | current_thread = saved_thread; |
f9e39928 PA |
947 | } |
948 | } | |
949 | ||
8336d594 PA |
950 | void |
951 | thread_db_detach (struct process_info *proc) | |
952 | { | |
fe978cb0 | 953 | struct thread_db *thread_db = proc->priv->thread_db; |
f9e39928 PA |
954 | |
955 | if (thread_db) | |
956 | { | |
957 | disable_thread_event_reporting (proc); | |
958 | remove_thread_event_breakpoints (proc); | |
959 | } | |
8336d594 PA |
960 | } |
961 | ||
962 | /* Disconnect from libthread_db and free resources. */ | |
963 | ||
964 | void | |
965 | thread_db_mourn (struct process_info *proc) | |
966 | { | |
fe978cb0 | 967 | struct thread_db *thread_db = proc->priv->thread_db; |
8336d594 PA |
968 | if (thread_db) |
969 | { | |
96e9210f | 970 | td_ta_delete_ftype *td_ta_delete_p; |
8336d594 PA |
971 | |
972 | #ifndef USE_LIBTHREAD_DB_DIRECTLY | |
96e9210f | 973 | td_ta_delete_p = (td_ta_delete_ftype *) dlsym (thread_db->handle, "td_ta_delete"); |
8336d594 PA |
974 | #else |
975 | td_ta_delete_p = &td_ta_delete; | |
976 | #endif | |
cdbfd419 | 977 | |
cdbfd419 PP |
978 | if (td_ta_delete_p != NULL) |
979 | (*td_ta_delete_p) (thread_db->thread_agent); | |
980 | ||
fd7dd3e6 | 981 | #ifndef USE_LIBTHREAD_DB_DIRECTLY |
cdbfd419 | 982 | dlclose (thread_db->handle); |
96f15937 PP |
983 | #endif /* USE_LIBTHREAD_DB_DIRECTLY */ |
984 | ||
cdbfd419 | 985 | free (thread_db); |
fe978cb0 | 986 | proc->priv->thread_db = NULL; |
cdbfd419 PP |
987 | } |
988 | } | |
989 | ||
990 | /* Handle "set libthread-db-search-path" monitor command and return 1. | |
991 | For any other command, return 0. */ | |
992 | ||
993 | int | |
994 | thread_db_handle_monitor_command (char *mon) | |
995 | { | |
84e578fb DE |
996 | const char *cmd = "set libthread-db-search-path"; |
997 | size_t cmd_len = strlen (cmd); | |
998 | ||
999 | if (strncmp (mon, cmd, cmd_len) == 0 | |
1000 | && (mon[cmd_len] == '\0' | |
1001 | || mon[cmd_len] == ' ')) | |
cdbfd419 | 1002 | { |
84e578fb | 1003 | const char *cp = mon + cmd_len; |
cdbfd419 PP |
1004 | |
1005 | if (libthread_db_search_path != NULL) | |
1006 | free (libthread_db_search_path); | |
1007 | ||
1008 | /* Skip leading space (if any). */ | |
1009 | while (isspace (*cp)) | |
1010 | ++cp; | |
1011 | ||
84e578fb DE |
1012 | if (*cp == '\0') |
1013 | cp = LIBTHREAD_DB_SEARCH_PATH; | |
cdbfd419 PP |
1014 | libthread_db_search_path = xstrdup (cp); |
1015 | ||
1016 | monitor_output ("libthread-db-search-path set to `"); | |
1017 | monitor_output (libthread_db_search_path); | |
1018 | monitor_output ("'\n"); | |
1019 | return 1; | |
0d62e5e8 DJ |
1020 | } |
1021 | ||
cdbfd419 | 1022 | /* Tell server.c to perform default processing. */ |
0d62e5e8 DJ |
1023 | return 0; |
1024 | } |