nptl/forward.c

   1 /* Copyright (C) 2002-2019 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dlfcn.h>
  20 #include <pthreadP.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23
  24 #include <shlib-compat.h>
  25 #include <atomic.h>
  26 #include <safe-fatal.h>
  27
  28
  29 /* Pointers to the libc functions.  */
  30 struct pthread_functions __libc_pthread_functions attribute_hidden;
  31 int __libc_pthread_functions_init attribute_hidden;
  32
  33
  34 #define FORWARD2(name, rettype, decl, params, defaction) \
  35 rettype                                                                       \
  36 name decl                                                                     \
  37 {                                                                             \
  38   if (!__libc_pthread_functions_init)                                         \
  39     defaction;                                                                \
  40                                                                               \
  41   return PTHFCT_CALL (ptr_##name, params);                                    \
  42 }
  43
  44 /* Same as FORWARD2, only without return.  */
  45 #define FORWARD_NORETURN(name, rettype, decl, params, defaction) \
  46 rettype                                                                       \
  47 name decl                                                                     \
  48 {                                                                             \
  49   if (!__libc_pthread_functions_init)                                         \
  50     defaction;                                                                \
  51                                                                               \
  52   PTHFCT_CALL (ptr_##name, params);                                           \
  53 }
  54
  55 #define FORWARD(name, decl, params, defretval) \
  56   FORWARD2 (name, int, decl, params, return defretval)
  57
  58
  59 FORWARD (pthread_attr_setschedparam,
  60          (pthread_attr_t *attr, const struct sched_param *param),
  61          (attr, param), 0)
  62
  63 FORWARD (pthread_attr_getschedpolicy,
  64          (const pthread_attr_t *attr, int *policy), (attr, policy), 0)
  65 FORWARD (pthread_attr_setschedpolicy, (pthread_attr_t *attr, int policy),
  66          (attr, policy), 0)
  67
  68 FORWARD (pthread_attr_getscope,
  69          (const pthread_attr_t *attr, int *scope), (attr, scope), 0)
  70 FORWARD (pthread_attr_setscope, (pthread_attr_t *attr, int scope),
  71          (attr, scope), 0)
  72
  73
  74 FORWARD (pthread_condattr_destroy, (pthread_condattr_t *attr), (attr), 0)
  75 FORWARD (pthread_condattr_init, (pthread_condattr_t *attr), (attr), 0)
  76
  77 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
  78 FORWARD2 (__pthread_cond_broadcast_2_0, int attribute_compat_text_section,
  79           (pthread_cond_2_0_t *cond), (cond), return 0)
  80 compat_symbol (libc, __pthread_cond_broadcast_2_0, pthread_cond_broadcast,
  81                GLIBC_2_0);
  82 #endif
  83 FORWARD (__pthread_cond_broadcast, (pthread_cond_t *cond), (cond), 0)
  84 versioned_symbol (libc, __pthread_cond_broadcast, pthread_cond_broadcast,
  85                   GLIBC_2_3_2);
  86
  87 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
  88 FORWARD2 (__pthread_cond_destroy_2_0, int attribute_compat_text_section,
  89           (pthread_cond_2_0_t *cond), (cond), return 0)
  90 compat_symbol (libc, __pthread_cond_destroy_2_0, pthread_cond_destroy,
  91                GLIBC_2_0);
  92 #endif
  93 FORWARD (__pthread_cond_destroy, (pthread_cond_t *cond), (cond), 0)
  94 versioned_symbol (libc, __pthread_cond_destroy, pthread_cond_destroy,
  95                   GLIBC_2_3_2);
  96
  97 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
  98 FORWARD2 (__pthread_cond_init_2_0, int attribute_compat_text_section,
  99           (pthread_cond_2_0_t *cond, const pthread_condattr_t *cond_attr),
 100           (cond, cond_attr), return 0)
 101 compat_symbol (libc, __pthread_cond_init_2_0, pthread_cond_init, GLIBC_2_0);
 102 #endif
 103 FORWARD (__pthread_cond_init,
 104          (pthread_cond_t *cond, const pthread_condattr_t *cond_attr),
 105          (cond, cond_attr), 0)
 106 versioned_symbol (libc, __pthread_cond_init, pthread_cond_init, GLIBC_2_3_2);
 107
 108 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 109 FORWARD2 (__pthread_cond_signal_2_0, int attribute_compat_text_section,
 110           (pthread_cond_2_0_t *cond), (cond), return 0)
 111 compat_symbol (libc, __pthread_cond_signal_2_0, pthread_cond_signal,
 112                GLIBC_2_0);
 113 #endif
 114 FORWARD (__pthread_cond_signal, (pthread_cond_t *cond), (cond), 0)
 115 versioned_symbol (libc, __pthread_cond_signal, pthread_cond_signal,
 116                   GLIBC_2_3_2);
 117
 118 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 119 FORWARD2 (__pthread_cond_wait_2_0, int attribute_compat_text_section,
 120           (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex), (cond, mutex),
 121           return 0)
 122 compat_symbol (libc, __pthread_cond_wait_2_0, pthread_cond_wait,
 123                GLIBC_2_0);
 124 #endif
 125 FORWARD (__pthread_cond_wait, (pthread_cond_t *cond, pthread_mutex_t *mutex),
 126          (cond, mutex), 0)
 127 versioned_symbol (libc, __pthread_cond_wait, pthread_cond_wait,
 128                   GLIBC_2_3_2);
 129
 130 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 131 FORWARD2 (__pthread_cond_timedwait_2_0, int attribute_compat_text_section,
 132           (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex,
 133            const struct timespec *abstime), (cond, mutex, abstime),
 134           return 0)
 135 compat_symbol (libc, __pthread_cond_timedwait_2_0, pthread_cond_timedwait,
 136                GLIBC_2_0);
 137 #endif
 138 FORWARD (__pthread_cond_timedwait,
 139          (pthread_cond_t *cond, pthread_mutex_t *mutex,
 140           const struct timespec *abstime), (cond, mutex, abstime), 0)
 141 versioned_symbol (libc, __pthread_cond_timedwait, pthread_cond_timedwait,
 142                   GLIBC_2_3_2);
 143
 144
 145 FORWARD_NORETURN (__pthread_exit, void, (void *retval), (retval),
 146                   exit (EXIT_SUCCESS))
 147 strong_alias (__pthread_exit, pthread_exit);
 148
 149
 150 FORWARD (pthread_getschedparam,
 151          (pthread_t target_thread, int *policy, struct sched_param *param),
 152          (target_thread, policy, param), 0)
 153 FORWARD (pthread_setschedparam,
 154          (pthread_t target_thread, int policy,
 155           const struct sched_param *param), (target_thread, policy, param), 0)
 156
 157
 158 FORWARD (pthread_mutex_destroy, (pthread_mutex_t *mutex), (mutex), 0)
 159
 160 FORWARD (pthread_mutex_init,
 161          (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr),
 162          (mutex, mutexattr), 0)
 163
 164 FORWARD (pthread_mutex_lock, (pthread_mutex_t *mutex), (mutex), 0)
 165
 166 FORWARD (pthread_mutex_unlock, (pthread_mutex_t *mutex), (mutex), 0)
 167
 168 FORWARD (__pthread_setcancelstate, (int state, int *oldstate),
 169          (state, oldstate), 0)
 170 strong_alias (__pthread_setcancelstate, pthread_setcancelstate)
 171
 172 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 173
 174 FORWARD_NORETURN (__pthread_unwind,
 175                   void attribute_hidden __attribute ((noreturn))
 176                   __cleanup_fct_attribute attribute_compat_text_section,
 177                   (__pthread_unwind_buf_t *buf), (buf),
 178                   __safe_fatal ())