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835abc5c | 1 | /* Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <stdbool.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include "pthreadP.h" | |
25 | #include <hp-timing.h> | |
26 | #include <ldsodefs.h> | |
3e4fc359 | 27 | #include <atomic.h> |
12d7ca07 | 28 | #include <libc-internal.h> |
0e9d6240 | 29 | #include <resolv.h> |
76a50749 UD |
30 | |
31 | #include <shlib-compat.h> | |
32 | ||
33 | ||
34 | /* Local function to start thread and handle cleanup. */ | |
35 | static int start_thread (void *arg); | |
76a50749 UD |
36 | |
37 | ||
38 | /* Nozero if debugging mode is enabled. */ | |
39 | int __pthread_debug; | |
40 | ||
41 | /* Globally enabled events. */ | |
fa9a4ff0 | 42 | static td_thr_events_t __nptl_threads_events; |
76a50749 UD |
43 | |
44 | /* Pointer to descriptor with the last event. */ | |
fa9a4ff0 | 45 | static struct pthread *__nptl_last_event; |
76a50749 | 46 | |
47202270 UD |
47 | /* Number of threads running. */ |
48 | unsigned int __nptl_nthreads = 1; | |
49 | ||
76a50749 UD |
50 | |
51 | /* Code to allocate and deallocate a stack. */ | |
76a50749 UD |
52 | #include "allocatestack.c" |
53 | ||
54 | /* Code to create the thread. */ | |
8dea90aa | 55 | #include <createthread.c> |
76a50749 UD |
56 | |
57 | ||
76a50749 | 58 | struct pthread * |
90491dc4 | 59 | internal_function |
76a50749 UD |
60 | __find_in_stack_list (pd) |
61 | struct pthread *pd; | |
62 | { | |
63 | list_t *entry; | |
64 | struct pthread *result = NULL; | |
65 | ||
66 | lll_lock (stack_cache_lock); | |
67 | ||
68 | list_for_each (entry, &stack_used) | |
69 | { | |
70 | struct pthread *curp; | |
71 | ||
d4f64e1a | 72 | curp = list_entry (entry, struct pthread, list); |
76a50749 UD |
73 | if (curp == pd) |
74 | { | |
75 | result = curp; | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
80 | if (result == NULL) | |
81 | list_for_each (entry, &__stack_user) | |
82 | { | |
83 | struct pthread *curp; | |
84 | ||
d4f64e1a | 85 | curp = list_entry (entry, struct pthread, list); |
76a50749 UD |
86 | if (curp == pd) |
87 | { | |
88 | result = curp; | |
89 | break; | |
90 | } | |
91 | } | |
92 | ||
93 | lll_unlock (stack_cache_lock); | |
94 | ||
95 | return result; | |
96 | } | |
97 | ||
98 | ||
99 | /* Deallocate POSIX thread-local-storage. */ | |
3fa21fd8 UD |
100 | void |
101 | attribute_hidden | |
102 | __nptl_deallocate_tsd (void) | |
76a50749 | 103 | { |
877e51b2 UD |
104 | struct pthread *self = THREAD_SELF; |
105 | ||
76a50749 UD |
106 | /* Maybe no data was ever allocated. This happens often so we have |
107 | a flag for this. */ | |
877e51b2 | 108 | if (THREAD_GETMEM (self, specific_used)) |
76a50749 UD |
109 | { |
110 | size_t round; | |
6b4686a5 | 111 | size_t cnt; |
76a50749 | 112 | |
6b4686a5 UD |
113 | round = 0; |
114 | do | |
76a50749 | 115 | { |
76a50749 UD |
116 | size_t idx; |
117 | ||
c5acd3d7 | 118 | /* So far no new nonzero data entry. */ |
877e51b2 | 119 | THREAD_SETMEM (self, specific_used, false); |
c5acd3d7 | 120 | |
76a50749 | 121 | for (cnt = idx = 0; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt) |
6b4686a5 UD |
122 | { |
123 | struct pthread_key_data *level2; | |
124 | ||
877e51b2 | 125 | level2 = THREAD_GETMEM_NC (self, specific, cnt); |
6b4686a5 UD |
126 | |
127 | if (level2 != NULL) | |
128 | { | |
129 | size_t inner; | |
130 | ||
131 | for (inner = 0; inner < PTHREAD_KEY_2NDLEVEL_SIZE; | |
132 | ++inner, ++idx) | |
133 | { | |
134 | void *data = level2[inner].data; | |
135 | ||
877e51b2 UD |
136 | if (data != NULL) |
137 | { | |
138 | /* Always clear the data. */ | |
139 | level2[inner].data = NULL; | |
140 | ||
6b4686a5 UD |
141 | /* Make sure the data corresponds to a valid |
142 | key. This test fails if the key was | |
143 | deallocated and also if it was | |
144 | re-allocated. It is the user's | |
145 | responsibility to free the memory in this | |
146 | case. */ | |
877e51b2 UD |
147 | if (level2[inner].seq |
148 | == __pthread_keys[idx].seq | |
149 | /* It is not necessary to register a destructor | |
150 | function. */ | |
151 | && __pthread_keys[idx].destr != NULL) | |
152 | /* Call the user-provided destructor. */ | |
153 | __pthread_keys[idx].destr (data); | |
6b4686a5 UD |
154 | } |
155 | } | |
156 | } | |
157 | else | |
158 | idx += PTHREAD_KEY_1STLEVEL_SIZE; | |
159 | } | |
877e51b2 UD |
160 | |
161 | if (THREAD_GETMEM (self, specific_used) == 0) | |
162 | /* No data has been modified. */ | |
163 | goto just_free; | |
76a50749 | 164 | } |
877e51b2 UD |
165 | /* We only repeat the process a fixed number of times. */ |
166 | while (__builtin_expect (++round < PTHREAD_DESTRUCTOR_ITERATIONS, 0)); | |
76a50749 | 167 | |
877e51b2 UD |
168 | /* Just clear the memory of the first block for reuse. */ |
169 | memset (&THREAD_SELF->specific_1stblock, '\0', | |
170 | sizeof (self->specific_1stblock)); | |
6b4686a5 | 171 | |
877e51b2 | 172 | just_free: |
6b4686a5 UD |
173 | /* Free the memory for the other blocks. */ |
174 | for (cnt = 1; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt) | |
175 | { | |
176 | struct pthread_key_data *level2; | |
177 | ||
877e51b2 | 178 | level2 = THREAD_GETMEM_NC (self, specific, cnt); |
6b4686a5 UD |
179 | if (level2 != NULL) |
180 | { | |
181 | /* The first block is allocated as part of the thread | |
182 | descriptor. */ | |
183 | free (level2); | |
877e51b2 | 184 | THREAD_SETMEM_NC (self, specific, cnt, NULL); |
6b4686a5 UD |
185 | } |
186 | } | |
187 | ||
877e51b2 | 188 | THREAD_SETMEM (self, specific_used, false); |
76a50749 UD |
189 | } |
190 | } | |
191 | ||
192 | ||
193 | /* Deallocate a thread's stack after optionally making sure the thread | |
194 | descriptor is still valid. */ | |
195 | void | |
90491dc4 | 196 | internal_function |
76a50749 UD |
197 | __free_tcb (struct pthread *pd) |
198 | { | |
199 | /* The thread is exiting now. */ | |
ba25bb0f UD |
200 | if (__builtin_expect (atomic_bit_test_set (&pd->cancelhandling, |
201 | TERMINATED_BIT) == 0, 1)) | |
76a50749 UD |
202 | { |
203 | /* Remove the descriptor from the list. */ | |
204 | if (DEBUGGING_P && __find_in_stack_list (pd) == NULL) | |
205 | /* Something is really wrong. The descriptor for a still | |
206 | running thread is gone. */ | |
207 | abort (); | |
208 | ||
f17efcb4 UD |
209 | /* Free TPP data. */ |
210 | if (__builtin_expect (pd->tpp != NULL, 0)) | |
211 | { | |
212 | struct priority_protection_data *tpp = pd->tpp; | |
213 | ||
214 | pd->tpp = NULL; | |
215 | free (tpp); | |
216 | } | |
217 | ||
76a50749 UD |
218 | /* Queue the stack memory block for reuse and exit the process. The |
219 | kernel will signal via writing to the address returned by | |
220 | QUEUE-STACK when the stack is available. */ | |
221 | __deallocate_stack (pd); | |
222 | } | |
223 | } | |
224 | ||
225 | ||
226 | static int | |
227 | start_thread (void *arg) | |
228 | { | |
229 | struct pthread *pd = (struct pthread *) arg; | |
230 | ||
231 | #if HP_TIMING_AVAIL | |
232 | /* Remember the time when the thread was started. */ | |
233 | hp_timing_t now; | |
234 | HP_TIMING_NOW (now); | |
235 | THREAD_SETMEM (pd, cpuclock_offset, now); | |
236 | #endif | |
237 | ||
0e9d6240 UD |
238 | /* Initialize resolver state pointer. */ |
239 | __resp = &pd->res; | |
240 | ||
0f6699ea UD |
241 | #ifdef __NR_set_robust_list |
242 | # ifndef __ASSUME_SET_ROBUST_LIST | |
243 | if (__set_robust_list_avail >= 0) | |
244 | # endif | |
245 | { | |
246 | INTERNAL_SYSCALL_DECL (err); | |
247 | /* This call should never fail because the initial call in init.c | |
248 | succeeded. */ | |
249 | INTERNAL_SYSCALL (set_robust_list, err, 2, &pd->robust_head, | |
250 | sizeof (struct robust_list_head)); | |
251 | } | |
252 | #endif | |
253 | ||
b051fc44 UD |
254 | /* If the parent was running cancellation handlers while creating |
255 | the thread the new thread inherited the signal mask. Reset the | |
256 | cancellation signal mask. */ | |
257 | if (__builtin_expect (pd->parent_cancelhandling & CANCELING_BITMASK, 0)) | |
258 | { | |
259 | INTERNAL_SYSCALL_DECL (err); | |
260 | sigset_t mask; | |
261 | __sigemptyset (&mask); | |
262 | __sigaddset (&mask, SIGCANCEL); | |
263 | (void) INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_UNBLOCK, &mask, | |
264 | NULL, _NSIG / 8); | |
265 | } | |
266 | ||
76a50749 UD |
267 | /* This is where the try/finally block should be created. For |
268 | compilers without that support we do use setjmp. */ | |
877e51b2 UD |
269 | struct pthread_unwind_buf unwind_buf; |
270 | ||
271 | /* No previous handlers. */ | |
272 | unwind_buf.priv.data.prev = NULL; | |
273 | unwind_buf.priv.data.cleanup = NULL; | |
274 | ||
275 | int not_first_call; | |
276 | not_first_call = setjmp ((struct __jmp_buf_tag *) unwind_buf.cancel_jmp_buf); | |
18d009ca | 277 | if (__builtin_expect (! not_first_call, 1)) |
76a50749 | 278 | { |
877e51b2 UD |
279 | /* Store the new cleanup handler info. */ |
280 | THREAD_SETMEM (pd, cleanup_jmp_buf, &unwind_buf); | |
281 | ||
5f66b766 UD |
282 | if (__builtin_expect (pd->stopped_start, 0)) |
283 | { | |
284 | int oldtype = CANCEL_ASYNC (); | |
362038b0 | 285 | |
5f66b766 UD |
286 | /* Get the lock the parent locked to force synchronization. */ |
287 | lll_lock (pd->lock); | |
288 | /* And give it up right away. */ | |
289 | lll_unlock (pd->lock); | |
362038b0 | 290 | |
5f66b766 UD |
291 | CANCEL_RESET (oldtype); |
292 | } | |
362038b0 | 293 | |
76a50749 | 294 | /* Run the code the user provided. */ |
42c8f44c UD |
295 | #ifdef CALL_THREAD_FCT |
296 | THREAD_SETMEM (pd, result, CALL_THREAD_FCT (pd)); | |
297 | #else | |
cc775edf | 298 | THREAD_SETMEM (pd, result, pd->start_routine (pd->arg)); |
42c8f44c | 299 | #endif |
76a50749 UD |
300 | } |
301 | ||
6b4686a5 | 302 | /* Run the destructor for the thread-local data. */ |
3fa21fd8 | 303 | __nptl_deallocate_tsd (); |
6b4686a5 | 304 | |
12d7ca07 RM |
305 | /* Clean up any state libc stored in thread-local variables. */ |
306 | __libc_thread_freeres (); | |
76a50749 | 307 | |
47202270 UD |
308 | /* If this is the last thread we terminate the process now. We |
309 | do not notify the debugger, it might just irritate it if there | |
310 | is no thread left. */ | |
729924a0 | 311 | if (__builtin_expect (atomic_decrement_and_test (&__nptl_nthreads), 0)) |
47202270 UD |
312 | /* This was the last thread. */ |
313 | exit (0); | |
314 | ||
76a50749 UD |
315 | /* Report the death of the thread if this is wanted. */ |
316 | if (__builtin_expect (pd->report_events, 0)) | |
317 | { | |
318 | /* See whether TD_DEATH is in any of the mask. */ | |
319 | const int idx = __td_eventword (TD_DEATH); | |
320 | const uint32_t mask = __td_eventmask (TD_DEATH); | |
321 | ||
322 | if ((mask & (__nptl_threads_events.event_bits[idx] | |
323 | | pd->eventbuf.eventmask.event_bits[idx])) != 0) | |
324 | { | |
325 | /* Yep, we have to signal the death. Add the descriptor to | |
326 | the list but only if it is not already on it. */ | |
327 | if (pd->nextevent == NULL) | |
328 | { | |
329 | pd->eventbuf.eventnum = TD_DEATH; | |
330 | pd->eventbuf.eventdata = pd; | |
331 | ||
332 | do | |
333 | pd->nextevent = __nptl_last_event; | |
5a3ab2fc UD |
334 | while (atomic_compare_and_exchange_bool_acq (&__nptl_last_event, |
335 | pd, pd->nextevent)); | |
76a50749 UD |
336 | } |
337 | ||
338 | /* Now call the function to signal the event. */ | |
339 | __nptl_death_event (); | |
340 | } | |
341 | } | |
342 | ||
6461e577 RM |
343 | /* The thread is exiting now. Don't set this bit until after we've hit |
344 | the event-reporting breakpoint, so that td_thr_get_info on us while at | |
345 | the breakpoint reports TD_THR_RUN state rather than TD_THR_ZOMBIE. */ | |
346 | atomic_bit_set (&pd->cancelhandling, EXITING_BIT); | |
76a50749 | 347 | |
0f6699ea | 348 | #ifndef __ASSUME_SET_ROBUST_LIST |
1bcfb5a5 | 349 | /* If this thread has any robust mutexes locked, handle them now. */ |
0f6699ea UD |
350 | # if __WORDSIZE == 64 |
351 | void *robust = pd->robust_head.list; | |
352 | # else | |
b007ce7c | 353 | __pthread_slist_t *robust = pd->robust_list.__next; |
0f6699ea | 354 | # endif |
df47504c UD |
355 | /* We let the kernel do the notification if it is able to do so. |
356 | If we have to do it here there for sure are no PI mutexes involved | |
357 | since the kernel support for them is even more recent. */ | |
0f6699ea | 358 | if (__set_robust_list_avail < 0 |
df47504c | 359 | && __builtin_expect (robust != (void *) &pd->robust_head, 0)) |
1bcfb5a5 UD |
360 | { |
361 | do | |
362 | { | |
b007ce7c | 363 | struct __pthread_mutex_s *this = (struct __pthread_mutex_s *) |
0f6699ea UD |
364 | ((char *) robust - offsetof (struct __pthread_mutex_s, |
365 | __list.__next)); | |
366 | robust = *((void **) robust); | |
d804f5df | 367 | |
0f6699ea | 368 | # ifdef __PTHREAD_MUTEX_HAVE_PREV |
b007ce7c | 369 | this->__list.__prev = NULL; |
0f6699ea UD |
370 | # endif |
371 | this->__list.__next = NULL; | |
1bcfb5a5 | 372 | |
683040c3 | 373 | lll_robust_mutex_dead (this->__lock); |
1bcfb5a5 | 374 | } |
df47504c | 375 | while (robust != (void *) &pd->robust_head); |
1bcfb5a5 | 376 | } |
0f6699ea | 377 | #endif |
1bcfb5a5 | 378 | |
76a50749 UD |
379 | /* If the thread is detached free the TCB. */ |
380 | if (IS_DETACHED (pd)) | |
381 | /* Free the TCB. */ | |
382 | __free_tcb (pd); | |
dff9a7a1 UD |
383 | else if (__builtin_expect (pd->cancelhandling & SETXID_BITMASK, 0)) |
384 | { | |
385 | /* Some other thread might call any of the setXid functions and expect | |
386 | us to reply. In this case wait until we did that. */ | |
387 | do | |
085a4412 | 388 | lll_futex_wait (&pd->setxid_futex, 0, LLL_PRIVATE); |
dff9a7a1 UD |
389 | while (pd->cancelhandling & SETXID_BITMASK); |
390 | ||
391 | /* Reset the value so that the stack can be reused. */ | |
392 | pd->setxid_futex = 0; | |
393 | } | |
76a50749 UD |
394 | |
395 | /* We cannot call '_exit' here. '_exit' will terminate the process. | |
396 | ||
397 | The 'exit' implementation in the kernel will signal when the | |
398 | process is really dead since 'clone' got passed the CLONE_CLEARTID | |
399 | flag. The 'tid' field in the TCB will be set to zero. | |
400 | ||
401 | The exit code is zero since in case all threads exit by calling | |
402 | 'pthread_exit' the exit status must be 0 (zero). */ | |
403 | __exit_thread_inline (0); | |
404 | ||
405 | /* NOTREACHED */ | |
406 | return 0; | |
407 | } | |
408 | ||
409 | ||
76a50749 UD |
410 | /* Default thread attributes for the case when the user does not |
411 | provide any. */ | |
412 | static const struct pthread_attr default_attr = | |
413 | { | |
414 | /* Just some value > 0 which gets rounded to the nearest page size. */ | |
415 | .guardsize = 1, | |
416 | }; | |
417 | ||
418 | ||
419 | int | |
420 | __pthread_create_2_1 (newthread, attr, start_routine, arg) | |
421 | pthread_t *newthread; | |
422 | const pthread_attr_t *attr; | |
423 | void *(*start_routine) (void *); | |
424 | void *arg; | |
425 | { | |
426 | STACK_VARIABLES; | |
76a50749 | 427 | |
1e6da2b0 | 428 | const struct pthread_attr *iattr = (struct pthread_attr *) attr; |
76a50749 UD |
429 | if (iattr == NULL) |
430 | /* Is this the best idea? On NUMA machines this could mean | |
431 | accessing far-away memory. */ | |
432 | iattr = &default_attr; | |
433 | ||
dff9a7a1 | 434 | struct pthread *pd = NULL; |
1e6da2b0 | 435 | int err = ALLOCATE_STACK (iattr, &pd); |
729924a0 | 436 | if (__builtin_expect (err != 0, 0)) |
76a50749 UD |
437 | /* Something went wrong. Maybe a parameter of the attributes is |
438 | invalid or we could not allocate memory. */ | |
439 | return err; | |
440 | ||
441 | ||
442 | /* Initialize the TCB. All initializations with zero should be | |
443 | performed in 'get_cached_stack'. This way we avoid doing this if | |
444 | the stack freshly allocated with 'mmap'. */ | |
445 | ||
5d5d5969 | 446 | #ifdef TLS_TCB_AT_TP |
76a50749 | 447 | /* Reference to the TCB itself. */ |
55c11fbd | 448 | pd->header.self = pd; |
76a50749 | 449 | |
d4f64e1a | 450 | /* Self-reference for TLS. */ |
55c11fbd | 451 | pd->header.tcb = pd; |
76a50749 UD |
452 | #endif |
453 | ||
454 | /* Store the address of the start routine and the parameter. Since | |
455 | we do not start the function directly the stillborn thread will | |
456 | get the information from its thread descriptor. */ | |
457 | pd->start_routine = start_routine; | |
458 | pd->arg = arg; | |
459 | ||
460 | /* Copy the thread attribute flags. */ | |
14ffbc83 UD |
461 | struct pthread *self = THREAD_SELF; |
462 | pd->flags = ((iattr->flags & ~(ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) | |
463 | | (self->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET))); | |
76a50749 UD |
464 | |
465 | /* Initialize the field for the ID of the thread which is waiting | |
466 | for us. This is a self-reference in case the thread is created | |
467 | detached. */ | |
468 | pd->joinid = iattr->flags & ATTR_FLAG_DETACHSTATE ? pd : NULL; | |
469 | ||
470 | /* The debug events are inherited from the parent. */ | |
14ffbc83 UD |
471 | pd->eventbuf = self->eventbuf; |
472 | ||
76a50749 | 473 | |
14ffbc83 UD |
474 | /* Copy the parent's scheduling parameters. The flags will say what |
475 | is valid and what is not. */ | |
476 | pd->schedpolicy = self->schedpolicy; | |
477 | pd->schedparam = self->schedparam; | |
76a50749 | 478 | |
35f1e827 UD |
479 | /* Copy the stack guard canary. */ |
480 | #ifdef THREAD_COPY_STACK_GUARD | |
481 | THREAD_COPY_STACK_GUARD (pd); | |
482 | #endif | |
483 | ||
827b7087 UD |
484 | /* Copy the pointer guard value. */ |
485 | #ifdef THREAD_COPY_POINTER_GUARD | |
486 | THREAD_COPY_POINTER_GUARD (pd); | |
487 | #endif | |
488 | ||
14ffbc83 UD |
489 | /* Determine scheduling parameters for the thread. */ |
490 | if (attr != NULL | |
491 | && __builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0) | |
492 | && (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0) | |
76a50749 | 493 | { |
1e6da2b0 | 494 | INTERNAL_SYSCALL_DECL (scerr); |
14ffbc83 UD |
495 | |
496 | /* Use the scheduling parameters the user provided. */ | |
497 | if (iattr->flags & ATTR_FLAG_POLICY_SET) | |
498 | pd->schedpolicy = iattr->schedpolicy; | |
499 | else if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) | |
76a50749 | 500 | { |
1e6da2b0 | 501 | pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, scerr, 1, 0); |
14ffbc83 | 502 | pd->flags |= ATTR_FLAG_POLICY_SET; |
76a50749 | 503 | } |
14ffbc83 UD |
504 | |
505 | if (iattr->flags & ATTR_FLAG_SCHED_SET) | |
506 | memcpy (&pd->schedparam, &iattr->schedparam, | |
507 | sizeof (struct sched_param)); | |
508 | else if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) | |
509 | { | |
1e6da2b0 | 510 | INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam); |
14ffbc83 UD |
511 | pd->flags |= ATTR_FLAG_SCHED_SET; |
512 | } | |
513 | ||
514 | /* Check for valid priorities. */ | |
1e6da2b0 | 515 | int minprio = INTERNAL_SYSCALL (sched_get_priority_min, scerr, 1, |
14ffbc83 | 516 | iattr->schedpolicy); |
1e6da2b0 | 517 | int maxprio = INTERNAL_SYSCALL (sched_get_priority_max, scerr, 1, |
14ffbc83 UD |
518 | iattr->schedpolicy); |
519 | if (pd->schedparam.sched_priority < minprio | |
520 | || pd->schedparam.sched_priority > maxprio) | |
76a50749 | 521 | { |
14ffbc83 UD |
522 | err = EINVAL; |
523 | goto errout; | |
76a50749 UD |
524 | } |
525 | } | |
526 | ||
527 | /* Pass the descriptor to the caller. */ | |
528 | *newthread = (pthread_t) pd; | |
529 | ||
ebfa58bb UD |
530 | /* Remember whether the thread is detached or not. In case of an |
531 | error we have to free the stacks of non-detached stillborn | |
532 | threads. */ | |
533 | bool is_detached = IS_DETACHED (pd); | |
534 | ||
76a50749 | 535 | /* Start the thread. */ |
80f536db | 536 | err = create_thread (pd, iattr, STACK_VARIABLES_ARGS); |
76a50749 UD |
537 | if (err != 0) |
538 | { | |
539 | /* Something went wrong. Free the resources. */ | |
ebfa58bb | 540 | if (!is_detached) |
a1fbd858 UD |
541 | { |
542 | errout: | |
543 | __deallocate_stack (pd); | |
544 | } | |
76a50749 UD |
545 | return err; |
546 | } | |
547 | ||
548 | return 0; | |
549 | } | |
550 | versioned_symbol (libpthread, __pthread_create_2_1, pthread_create, GLIBC_2_1); | |
551 | ||
552 | ||
553 | #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) | |
554 | int | |
555 | __pthread_create_2_0 (newthread, attr, start_routine, arg) | |
556 | pthread_t *newthread; | |
557 | const pthread_attr_t *attr; | |
558 | void *(*start_routine) (void *); | |
559 | void *arg; | |
560 | { | |
561 | /* The ATTR attribute is not really of type `pthread_attr_t *'. It has | |
562 | the old size and access to the new members might crash the program. | |
563 | We convert the struct now. */ | |
564 | struct pthread_attr new_attr; | |
565 | ||
566 | if (attr != NULL) | |
567 | { | |
568 | struct pthread_attr *iattr = (struct pthread_attr *) attr; | |
569 | size_t ps = __getpagesize (); | |
570 | ||
571 | /* Copy values from the user-provided attributes. */ | |
572 | new_attr.schedparam = iattr->schedparam; | |
573 | new_attr.schedpolicy = iattr->schedpolicy; | |
574 | new_attr.flags = iattr->flags; | |
575 | ||
576 | /* Fill in default values for the fields not present in the old | |
577 | implementation. */ | |
578 | new_attr.guardsize = ps; | |
579 | new_attr.stackaddr = NULL; | |
580 | new_attr.stacksize = 0; | |
ca85ede0 | 581 | new_attr.cpuset = NULL; |
76a50749 UD |
582 | |
583 | /* We will pass this value on to the real implementation. */ | |
584 | attr = (pthread_attr_t *) &new_attr; | |
585 | } | |
586 | ||
587 | return __pthread_create_2_1 (newthread, attr, start_routine, arg); | |
588 | } | |
589 | compat_symbol (libpthread, __pthread_create_2_0, pthread_create, | |
590 | GLIBC_2_0); | |
591 | #endif | |
7f08f55a RM |
592 | \f |
593 | /* Information for libthread_db. */ | |
594 | ||
595 | #include "../nptl_db/db_info.c" | |
b639d0c9 UD |
596 | \f |
597 | /* If pthread_create is present, libgcc_eh.a and libsupc++.a expects some other POSIX thread | |
598 | functions to be present as well. */ | |
599 | PTHREAD_STATIC_FN_REQUIRE (pthread_mutex_lock) | |
600 | PTHREAD_STATIC_FN_REQUIRE (pthread_mutex_unlock) | |
601 | ||
602 | PTHREAD_STATIC_FN_REQUIRE (pthread_once) | |
ef2bb413 | 603 | PTHREAD_STATIC_FN_REQUIRE (pthread_cancel) |
b639d0c9 UD |
604 | |
605 | PTHREAD_STATIC_FN_REQUIRE (pthread_key_create) | |
606 | PTHREAD_STATIC_FN_REQUIRE (pthread_setspecific) | |
607 | PTHREAD_STATIC_FN_REQUIRE (pthread_getspecific) |