nptl/pthread_create.c

   1 /* Copyright (C) 2002-2014 Free Software Foundation, Inc.
   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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <ctype.h>
  20 #include <errno.h>
  21 #include <stdbool.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25 #include "pthreadP.h"
  26 #include <hp-timing.h>
  27 #include <ldsodefs.h>
  28 #include <atomic.h>
  29 #include <libc-internal.h>
  30 #include <resolv.h>
  31 #include <kernel-features.h>
  32 #include <exit-thread.h>
  33
  34 #include <shlib-compat.h>
  35
  36 #include <stap-probe.h>
  37
  38
  39 /* Local function to start thread and handle cleanup.  */
  40 static int start_thread (void *arg);
  41
  42
  43 /* Nozero if debugging mode is enabled.  */
  44 int __pthread_debug;
  45
  46 /* Globally enabled events.  */
  47 static td_thr_events_t __nptl_threads_events __attribute_used__;
  48
  49 /* Pointer to descriptor with the last event.  */
  50 static struct pthread *__nptl_last_event __attribute_used__;
  51
  52 /* Number of threads running.  */
  53 unsigned int __nptl_nthreads = 1;
  54
  55
  56 /* Code to allocate and deallocate a stack.  */
  57 #include "allocatestack.c"
  58
  59 /* Code to create the thread.  */
  60 #include <createthread.c>
  61
  62
  63 struct pthread *
  64 internal_function
  65 __find_in_stack_list (pd)
  66      struct pthread *pd;
  67 {
  68   list_t *entry;
  69   struct pthread *result = NULL;
  70
  71   lll_lock (stack_cache_lock, LLL_PRIVATE);
  72
  73   list_for_each (entry, &stack_used)
  74     {
  75       struct pthread *curp;
  76
  77       curp = list_entry (entry, struct pthread, list);
  78       if (curp == pd)
  79         {
  80           result = curp;
  81           break;
  82         }
  83     }
  84
  85   if (result == NULL)
  86     list_for_each (entry, &__stack_user)
  87       {
  88         struct pthread *curp;
  89
  90         curp = list_entry (entry, struct pthread, list);
  91         if (curp == pd)
  92           {
  93             result = curp;
  94             break;
  95           }
  96       }
  97
  98   lll_unlock (stack_cache_lock, LLL_PRIVATE);
  99
 100   return result;
 101 }
 102
 103
 104 /* Deallocate POSIX thread-local-storage.  */
 105 void
 106 attribute_hidden
 107 __nptl_deallocate_tsd (void)
 108 {
 109   struct pthread *self = THREAD_SELF;
 110
 111   /* Maybe no data was ever allocated.  This happens often so we have
 112      a flag for this.  */
 113   if (THREAD_GETMEM (self, specific_used))
 114     {
 115       size_t round;
 116       size_t cnt;
 117
 118       round = 0;
 119       do
 120         {
 121           size_t idx;
 122
 123           /* So far no new nonzero data entry.  */
 124           THREAD_SETMEM (self, specific_used, false);
 125
 126           for (cnt = idx = 0; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt)
 127             {
 128               struct pthread_key_data *level2;
 129
 130               level2 = THREAD_GETMEM_NC (self, specific, cnt);
 131
 132               if (level2 != NULL)
 133                 {
 134                   size_t inner;
 135
 136                   for (inner = 0; inner < PTHREAD_KEY_2NDLEVEL_SIZE;
 137                        ++inner, ++idx)
 138                     {
 139                       void *data = level2[inner].data;
 140
 141                       if (data != NULL)
 142                         {
 143                           /* Always clear the data.  */
 144                           level2[inner].data = NULL;
 145
 146                           /* Make sure the data corresponds to a valid
 147                              key.  This test fails if the key was
 148                              deallocated and also if it was
 149                              re-allocated.  It is the user's
 150                              responsibility to free the memory in this
 151                              case.  */
 152                           if (level2[inner].seq
 153                               == __pthread_keys[idx].seq
 154                               /* It is not necessary to register a destructor
 155                                  function.  */
 156                               && __pthread_keys[idx].destr != NULL)
 157                             /* Call the user-provided destructor.  */
 158                             __pthread_keys[idx].destr (data);
 159                         }
 160                     }
 161                 }
 162               else
 163                 idx += PTHREAD_KEY_1STLEVEL_SIZE;
 164             }
 165
 166           if (THREAD_GETMEM (self, specific_used) == 0)
 167             /* No data has been modified.  */
 168             goto just_free;
 169         }
 170       /* We only repeat the process a fixed number of times.  */
 171       while (__builtin_expect (++round < PTHREAD_DESTRUCTOR_ITERATIONS, 0));
 172
 173       /* Just clear the memory of the first block for reuse.  */
 174       memset (&THREAD_SELF->specific_1stblock, '\0',
 175               sizeof (self->specific_1stblock));
 176
 177     just_free:
 178       /* Free the memory for the other blocks.  */
 179       for (cnt = 1; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt)
 180         {
 181           struct pthread_key_data *level2;
 182
 183           level2 = THREAD_GETMEM_NC (self, specific, cnt);
 184           if (level2 != NULL)
 185             {
 186               /* The first block is allocated as part of the thread
 187                  descriptor.  */
 188               free (level2);
 189               THREAD_SETMEM_NC (self, specific, cnt, NULL);
 190             }
 191         }
 192
 193       THREAD_SETMEM (self, specific_used, false);
 194     }
 195 }
 196
 197
 198 /* Deallocate a thread's stack after optionally making sure the thread
 199    descriptor is still valid.  */
 200 void
 201 internal_function
 202 __free_tcb (struct pthread *pd)
 203 {
 204   /* The thread is exiting now.  */
 205   if (__builtin_expect (atomic_bit_test_set (&pd->cancelhandling,
 206                                              TERMINATED_BIT) == 0, 1))
 207     {
 208       /* Remove the descriptor from the list.  */
 209       if (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
 210         /* Something is really wrong.  The descriptor for a still
 211            running thread is gone.  */
 212         abort ();
 213
 214       /* Free TPP data.  */
 215       if (__glibc_unlikely (pd->tpp != NULL))
 216         {
 217           struct priority_protection_data *tpp = pd->tpp;
 218
 219           pd->tpp = NULL;
 220           free (tpp);
 221         }
 222
 223       /* Queue the stack memory block for reuse and exit the process.  The
 224          kernel will signal via writing to the address returned by
 225          QUEUE-STACK when the stack is available.  */
 226       __deallocate_stack (pd);
 227     }
 228 }
 229
 230
 231 static int
 232 start_thread (void *arg)
 233 {
 234   struct pthread *pd = (struct pthread *) arg;
 235
 236 #if HP_TIMING_AVAIL
 237   /* Remember the time when the thread was started.  */
 238   hp_timing_t now;
 239   HP_TIMING_NOW (now);
 240   THREAD_SETMEM (pd, cpuclock_offset, now);
 241 #endif
 242
 243   /* Initialize resolver state pointer.  */
 244   __resp = &pd->res;
 245
 246   /* Initialize pointers to locale data.  */
 247   __ctype_init ();
 248
 249   /* Allow setxid from now onwards.  */
 250   if (__glibc_unlikely (atomic_exchange_acq (&pd->setxid_futex, 0) == -2))
 251     lll_futex_wake (&pd->setxid_futex, 1, LLL_PRIVATE);
 252
 253 #ifdef __NR_set_robust_list
 254 # ifndef __ASSUME_SET_ROBUST_LIST
 255   if (__set_robust_list_avail >= 0)
 256 # endif
 257     {
 258       INTERNAL_SYSCALL_DECL (err);
 259       /* This call should never fail because the initial call in init.c
 260          succeeded.  */
 261       INTERNAL_SYSCALL (set_robust_list, err, 2, &pd->robust_head,
 262                         sizeof (struct robust_list_head));
 263     }
 264 #endif
 265
 266   /* If the parent was running cancellation handlers while creating
 267      the thread the new thread inherited the signal mask.  Reset the
 268      cancellation signal mask.  */
 269   if (__glibc_unlikely (pd->parent_cancelhandling & CANCELING_BITMASK))
 270     {
 271       INTERNAL_SYSCALL_DECL (err);
 272       sigset_t mask;
 273       __sigemptyset (&mask);
 274       __sigaddset (&mask, SIGCANCEL);
 275       (void) INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_UNBLOCK, &mask,
 276                                NULL, _NSIG / 8);
 277     }
 278
 279   /* This is where the try/finally block should be created.  For
 280      compilers without that support we do use setjmp.  */
 281   struct pthread_unwind_buf unwind_buf;
 282
 283   /* No previous handlers.  */
 284   unwind_buf.priv.data.prev = NULL;
 285   unwind_buf.priv.data.cleanup = NULL;
 286
 287   int not_first_call;
 288   not_first_call = setjmp ((struct __jmp_buf_tag *) unwind_buf.cancel_jmp_buf);
 289   if (__glibc_likely (! not_first_call))
 290     {
 291       /* Store the new cleanup handler info.  */
 292       THREAD_SETMEM (pd, cleanup_jmp_buf, &unwind_buf);
 293
 294       if (__glibc_unlikely (pd->stopped_start))
 295         {
 296           int oldtype = CANCEL_ASYNC ();
 297
 298           /* Get the lock the parent locked to force synchronization.  */
 299           lll_lock (pd->lock, LLL_PRIVATE);
 300           /* And give it up right away.  */
 301           lll_unlock (pd->lock, LLL_PRIVATE);
 302
 303           CANCEL_RESET (oldtype);
 304         }
 305
 306       LIBC_PROBE (pthread_start, 3, (pthread_t) pd, pd->start_routine, pd->arg);
 307
 308       /* Run the code the user provided.  */
 309 #ifdef CALL_THREAD_FCT
 310       THREAD_SETMEM (pd, result, CALL_THREAD_FCT (pd));
 311 #else
 312       THREAD_SETMEM (pd, result, pd->start_routine (pd->arg));
 313 #endif
 314     }
 315
 316   /* Call destructors for the thread_local TLS variables.  */
 317 #ifndef SHARED
 318   if (&__call_tls_dtors != NULL)
 319 #endif
 320     __call_tls_dtors ();
 321
 322   /* Run the destructor for the thread-local data.  */
 323   __nptl_deallocate_tsd ();
 324
 325   /* Clean up any state libc stored in thread-local variables.  */
 326   __libc_thread_freeres ();
 327
 328   /* If this is the last thread we terminate the process now.  We
 329      do not notify the debugger, it might just irritate it if there
 330      is no thread left.  */
 331   if (__glibc_unlikely (atomic_decrement_and_test (&__nptl_nthreads)))
 332     /* This was the last thread.  */
 333     exit (0);
 334
 335   /* Report the death of the thread if this is wanted.  */
 336   if (__glibc_unlikely (pd->report_events))
 337     {
 338       /* See whether TD_DEATH is in any of the mask.  */
 339       const int idx = __td_eventword (TD_DEATH);
 340       const uint32_t mask = __td_eventmask (TD_DEATH);
 341
 342       if ((mask & (__nptl_threads_events.event_bits[idx]
 343                    | pd->eventbuf.eventmask.event_bits[idx])) != 0)
 344         {
 345           /* Yep, we have to signal the death.  Add the descriptor to
 346              the list but only if it is not already on it.  */
 347           if (pd->nextevent == NULL)
 348             {
 349               pd->eventbuf.eventnum = TD_DEATH;
 350               pd->eventbuf.eventdata = pd;
 351
 352               do
 353                 pd->nextevent = __nptl_last_event;
 354               while (atomic_compare_and_exchange_bool_acq (&__nptl_last_event,
 355                                                            pd, pd->nextevent));
 356             }
 357
 358           /* Now call the function to signal the event.  */
 359           __nptl_death_event ();
 360         }
 361     }
 362
 363   /* The thread is exiting now.  Don't set this bit until after we've hit
 364      the event-reporting breakpoint, so that td_thr_get_info on us while at
 365      the breakpoint reports TD_THR_RUN state rather than TD_THR_ZOMBIE.  */
 366   atomic_bit_set (&pd->cancelhandling, EXITING_BIT);
 367
 368 #ifndef __ASSUME_SET_ROBUST_LIST
 369   /* If this thread has any robust mutexes locked, handle them now.  */
 370 # ifdef __PTHREAD_MUTEX_HAVE_PREV
 371   void *robust = pd->robust_head.list;
 372 # else
 373   __pthread_slist_t *robust = pd->robust_list.__next;
 374 # endif
 375   /* We let the kernel do the notification if it is able to do so.
 376      If we have to do it here there for sure are no PI mutexes involved
 377      since the kernel support for them is even more recent.  */
 378   if (__set_robust_list_avail < 0
 379       && __builtin_expect (robust != (void *) &pd->robust_head, 0))
 380     {
 381       do
 382         {
 383           struct __pthread_mutex_s *this = (struct __pthread_mutex_s *)
 384             ((char *) robust - offsetof (struct __pthread_mutex_s,
 385                                          __list.__next));
 386           robust = *((void **) robust);
 387
 388 # ifdef __PTHREAD_MUTEX_HAVE_PREV
 389           this->__list.__prev = NULL;
 390 # endif
 391           this->__list.__next = NULL;
 392
 393           atomic_or (&this->__lock, FUTEX_OWNER_DIED);
 394           lll_futex_wake (this->__lock, 1, /* XYZ */ LLL_SHARED);
 395         }
 396       while (robust != (void *) &pd->robust_head);
 397     }
 398 #endif
 399
 400   /* Mark the memory of the stack as usable to the kernel.  We free
 401      everything except for the space used for the TCB itself.  */
 402   size_t pagesize_m1 = __getpagesize () - 1;
 403 #ifdef _STACK_GROWS_DOWN
 404   char *sp = CURRENT_STACK_FRAME;
 405   size_t freesize = (sp - (char *) pd->stackblock) & ~pagesize_m1;
 406 #else
 407 # error "to do"
 408 #endif
 409   assert (freesize < pd->stackblock_size);
 410   if (freesize > PTHREAD_STACK_MIN)
 411     __madvise (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
 412
 413   /* If the thread is detached free the TCB.  */
 414   if (IS_DETACHED (pd))
 415     /* Free the TCB.  */
 416     __free_tcb (pd);
 417   else if (__glibc_unlikely (pd->cancelhandling & SETXID_BITMASK))
 418     {
 419       /* Some other thread might call any of the setXid functions and expect
 420          us to reply.  In this case wait until we did that.  */
 421       do
 422         lll_futex_wait (&pd->setxid_futex, 0, LLL_PRIVATE);
 423       while (pd->cancelhandling & SETXID_BITMASK);
 424
 425       /* Reset the value so that the stack can be reused.  */
 426       pd->setxid_futex = 0;
 427     }
 428
 429   /* We cannot call '_exit' here.  '_exit' will terminate the process.
 430
 431      The 'exit' implementation in the kernel will signal when the
 432      process is really dead since 'clone' got passed the CLONE_CHILD_CLEARTID
 433      flag.  The 'tid' field in the TCB will be set to zero.
 434
 435      The exit code is zero since in case all threads exit by calling
 436      'pthread_exit' the exit status must be 0 (zero).  */
 437   __exit_thread ();
 438
 439   /* NOTREACHED */
 440   return 0;
 441 }
 442
 443
 444 int
 445 __pthread_create_2_1 (newthread, attr, start_routine, arg)
 446      pthread_t *newthread;
 447      const pthread_attr_t *attr;
 448      void *(*start_routine) (void *);
 449      void *arg;
 450 {
 451   STACK_VARIABLES;
 452
 453   const struct pthread_attr *iattr = (struct pthread_attr *) attr;
 454   struct pthread_attr default_attr;
 455   bool free_cpuset = false;
 456   if (iattr == NULL)
 457     {
 458       lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
 459       default_attr = __default_pthread_attr;
 460       size_t cpusetsize = default_attr.cpusetsize;
 461       if (cpusetsize > 0)
 462         {
 463           cpu_set_t *cpuset;
 464           if (__glibc_likely (__libc_use_alloca (cpusetsize)))
 465             cpuset = __alloca (cpusetsize);
 466           else
 467             {
 468               cpuset = malloc (cpusetsize);
 469               if (cpuset == NULL)
 470                 {
 471                   lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
 472                   return ENOMEM;
 473                 }
 474               free_cpuset = true;
 475             }
 476           memcpy (cpuset, default_attr.cpuset, cpusetsize);
 477           default_attr.cpuset = cpuset;
 478         }
 479       lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
 480       iattr = &default_attr;
 481     }
 482
 483   struct pthread *pd = NULL;
 484   int err = ALLOCATE_STACK (iattr, &pd);
 485   int retval = 0;
 486
 487   if (__glibc_unlikely (err != 0))
 488     /* Something went wrong.  Maybe a parameter of the attributes is
 489        invalid or we could not allocate memory.  Note we have to
 490        translate error codes.  */
 491     {
 492       retval = err == ENOMEM ? EAGAIN : err;
 493       goto out;
 494     }
 495
 496
 497   /* Initialize the TCB.  All initializations with zero should be
 498      performed in 'get_cached_stack'.  This way we avoid doing this if
 499      the stack freshly allocated with 'mmap'.  */
 500
 501 #if TLS_TCB_AT_TP
 502   /* Reference to the TCB itself.  */
 503   pd->header.self = pd;
 504
 505   /* Self-reference for TLS.  */
 506   pd->header.tcb = pd;
 507 #endif
 508
 509   /* Store the address of the start routine and the parameter.  Since
 510      we do not start the function directly the stillborn thread will
 511      get the information from its thread descriptor.  */
 512   pd->start_routine = start_routine;
 513   pd->arg = arg;
 514
 515   /* Copy the thread attribute flags.  */
 516   struct pthread *self = THREAD_SELF;
 517   pd->flags = ((iattr->flags & ~(ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET))
 518                | (self->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)));
 519
 520   /* Initialize the field for the ID of the thread which is waiting
 521      for us.  This is a self-reference in case the thread is created
 522      detached.  */
 523   pd->joinid = iattr->flags & ATTR_FLAG_DETACHSTATE ? pd : NULL;
 524
 525   /* The debug events are inherited from the parent.  */
 526   pd->eventbuf = self->eventbuf;
 527
 528
 529   /* Copy the parent's scheduling parameters.  The flags will say what
 530      is valid and what is not.  */
 531   pd->schedpolicy = self->schedpolicy;
 532   pd->schedparam = self->schedparam;
 533
 534   /* Copy the stack guard canary.  */
 535 #ifdef THREAD_COPY_STACK_GUARD
 536   THREAD_COPY_STACK_GUARD (pd);
 537 #endif
 538
 539   /* Copy the pointer guard value.  */
 540 #ifdef THREAD_COPY_POINTER_GUARD
 541   THREAD_COPY_POINTER_GUARD (pd);
 542 #endif
 543
 544   /* Determine scheduling parameters for the thread.  */
 545   if (__builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0)
 546       && (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0)
 547     {
 548       INTERNAL_SYSCALL_DECL (scerr);
 549
 550       /* Use the scheduling parameters the user provided.  */
 551       if (iattr->flags & ATTR_FLAG_POLICY_SET)
 552         pd->schedpolicy = iattr->schedpolicy;
 553       else if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
 554         {
 555           pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, scerr, 1, 0);
 556           pd->flags |= ATTR_FLAG_POLICY_SET;
 557         }
 558
 559       if (iattr->flags & ATTR_FLAG_SCHED_SET)
 560         memcpy (&pd->schedparam, &iattr->schedparam,
 561                 sizeof (struct sched_param));
 562       else if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
 563         {
 564           INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam);
 565           pd->flags |= ATTR_FLAG_SCHED_SET;
 566         }
 567
 568       /* Check for valid priorities.  */
 569       int minprio = INTERNAL_SYSCALL (sched_get_priority_min, scerr, 1,
 570                                       iattr->schedpolicy);
 571       int maxprio = INTERNAL_SYSCALL (sched_get_priority_max, scerr, 1,
 572                                       iattr->schedpolicy);
 573       if (pd->schedparam.sched_priority < minprio
 574           || pd->schedparam.sched_priority > maxprio)
 575         {
 576           /* Perhaps a thread wants to change the IDs and if waiting
 577              for this stillborn thread.  */
 578           if (__builtin_expect (atomic_exchange_acq (&pd->setxid_futex, 0)
 579                                 == -2, 0))
 580             lll_futex_wake (&pd->setxid_futex, 1, LLL_PRIVATE);
 581
 582           __deallocate_stack (pd);
 583
 584           retval = EINVAL;
 585           goto out;
 586         }
 587     }
 588
 589   /* Pass the descriptor to the caller.  */
 590   *newthread = (pthread_t) pd;
 591
 592   LIBC_PROBE (pthread_create, 4, newthread, attr, start_routine, arg);
 593
 594   /* Start the thread.  */
 595   retval = create_thread (pd, iattr, STACK_VARIABLES_ARGS);
 596
 597  out:
 598   if (__glibc_unlikely (free_cpuset))
 599     free (default_attr.cpuset);
 600
 601   return retval;
 602 }
 603 versioned_symbol (libpthread, __pthread_create_2_1, pthread_create, GLIBC_2_1);
 604
 605
 606 #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
 607 int
 608 __pthread_create_2_0 (newthread, attr, start_routine, arg)
 609      pthread_t *newthread;
 610      const pthread_attr_t *attr;
 611      void *(*start_routine) (void *);
 612      void *arg;
 613 {
 614   /* The ATTR attribute is not really of type `pthread_attr_t *'.  It has
 615      the old size and access to the new members might crash the program.
 616      We convert the struct now.  */
 617   struct pthread_attr new_attr;
 618
 619   if (attr != NULL)
 620     {
 621       struct pthread_attr *iattr = (struct pthread_attr *) attr;
 622       size_t ps = __getpagesize ();
 623
 624       /* Copy values from the user-provided attributes.  */
 625       new_attr.schedparam = iattr->schedparam;
 626       new_attr.schedpolicy = iattr->schedpolicy;
 627       new_attr.flags = iattr->flags;
 628
 629       /* Fill in default values for the fields not present in the old
 630          implementation.  */
 631       new_attr.guardsize = ps;
 632       new_attr.stackaddr = NULL;
 633       new_attr.stacksize = 0;
 634       new_attr.cpuset = NULL;
 635
 636       /* We will pass this value on to the real implementation.  */
 637       attr = (pthread_attr_t *) &new_attr;
 638     }
 639
 640   return __pthread_create_2_1 (newthread, attr, start_routine, arg);
 641 }
 642 compat_symbol (libpthread, __pthread_create_2_0, pthread_create,
 643                GLIBC_2_0);
 644 #endif
 645 \f
 646 /* Information for libthread_db.  */
 647
 648 #include "../nptl_db/db_info.c"
 649 \f
 650 /* If pthread_create is present, libgcc_eh.a and libsupc++.a expects some other POSIX thread
 651    functions to be present as well.  */
 652 PTHREAD_STATIC_FN_REQUIRE (pthread_mutex_lock)
 653 PTHREAD_STATIC_FN_REQUIRE (pthread_mutex_trylock)
 654 PTHREAD_STATIC_FN_REQUIRE (pthread_mutex_unlock)
 655
 656 PTHREAD_STATIC_FN_REQUIRE (pthread_once)
 657 PTHREAD_STATIC_FN_REQUIRE (pthread_cancel)
 658
 659 PTHREAD_STATIC_FN_REQUIRE (pthread_key_create)
 660 PTHREAD_STATIC_FN_REQUIRE (pthread_key_delete)
 661 PTHREAD_STATIC_FN_REQUIRE (pthread_setspecific)
 662 PTHREAD_STATIC_FN_REQUIRE (pthread_getspecific)