nptl/forward.c

   1 /* Copyright (C) 2002-2017 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 <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_destroy, (pthread_attr_t *attr), (attr), 0)
  60
  61 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_1)
  62 FORWARD (__pthread_attr_init_2_0, (pthread_attr_t *attr), (attr), 0)
  63 compat_symbol (libc, __pthread_attr_init_2_0, pthread_attr_init, GLIBC_2_0);
  64 #endif
  65
  66 FORWARD (__pthread_attr_init_2_1, (pthread_attr_t *attr), (attr), 0)
  67 versioned_symbol (libc, __pthread_attr_init_2_1, pthread_attr_init, GLIBC_2_1);
  68
  69 FORWARD (pthread_attr_getdetachstate,
  70          (const pthread_attr_t *attr, int *detachstate), (attr, detachstate),
  71          0)
  72 FORWARD (pthread_attr_setdetachstate, (pthread_attr_t *attr, int detachstate),
  73          (attr, detachstate), 0)
  74
  75 FORWARD (pthread_attr_getinheritsched,
  76          (const pthread_attr_t *attr, int *inherit), (attr, inherit), 0)
  77 FORWARD (pthread_attr_setinheritsched, (pthread_attr_t *attr, int inherit),
  78          (attr, inherit), 0)
  79
  80 FORWARD (pthread_attr_getschedparam,
  81          (const pthread_attr_t *attr, struct sched_param *param),
  82          (attr, param), 0)
  83 FORWARD (pthread_attr_setschedparam,
  84          (pthread_attr_t *attr, const struct sched_param *param),
  85          (attr, param), 0)
  86
  87 FORWARD (pthread_attr_getschedpolicy,
  88          (const pthread_attr_t *attr, int *policy), (attr, policy), 0)
  89 FORWARD (pthread_attr_setschedpolicy, (pthread_attr_t *attr, int policy),
  90          (attr, policy), 0)
  91
  92 FORWARD (pthread_attr_getscope,
  93          (const pthread_attr_t *attr, int *scope), (attr, scope), 0)
  94 FORWARD (pthread_attr_setscope, (pthread_attr_t *attr, int scope),
  95          (attr, scope), 0)
  96
  97
  98 FORWARD (pthread_condattr_destroy, (pthread_condattr_t *attr), (attr), 0)
  99 FORWARD (pthread_condattr_init, (pthread_condattr_t *attr), (attr), 0)
 100
 101 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 102 FORWARD2 (__pthread_cond_broadcast_2_0, int attribute_compat_text_section,
 103           (pthread_cond_2_0_t *cond), (cond), return 0)
 104 compat_symbol (libc, __pthread_cond_broadcast_2_0, pthread_cond_broadcast,
 105                GLIBC_2_0);
 106 #endif
 107 FORWARD (__pthread_cond_broadcast, (pthread_cond_t *cond), (cond), 0)
 108 versioned_symbol (libc, __pthread_cond_broadcast, pthread_cond_broadcast,
 109                   GLIBC_2_3_2);
 110
 111 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 112 FORWARD2 (__pthread_cond_destroy_2_0, int attribute_compat_text_section,
 113           (pthread_cond_2_0_t *cond), (cond), return 0)
 114 compat_symbol (libc, __pthread_cond_destroy_2_0, pthread_cond_destroy,
 115                GLIBC_2_0);
 116 #endif
 117 FORWARD (__pthread_cond_destroy, (pthread_cond_t *cond), (cond), 0)
 118 versioned_symbol (libc, __pthread_cond_destroy, pthread_cond_destroy,
 119                   GLIBC_2_3_2);
 120
 121 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 122 FORWARD2 (__pthread_cond_init_2_0, int attribute_compat_text_section,
 123           (pthread_cond_2_0_t *cond, const pthread_condattr_t *cond_attr),
 124           (cond, cond_attr), return 0)
 125 compat_symbol (libc, __pthread_cond_init_2_0, pthread_cond_init, GLIBC_2_0);
 126 #endif
 127 FORWARD (__pthread_cond_init,
 128          (pthread_cond_t *cond, const pthread_condattr_t *cond_attr),
 129          (cond, cond_attr), 0)
 130 versioned_symbol (libc, __pthread_cond_init, pthread_cond_init, GLIBC_2_3_2);
 131
 132 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 133 FORWARD2 (__pthread_cond_signal_2_0, int attribute_compat_text_section,
 134           (pthread_cond_2_0_t *cond), (cond), return 0)
 135 compat_symbol (libc, __pthread_cond_signal_2_0, pthread_cond_signal,
 136                GLIBC_2_0);
 137 #endif
 138 FORWARD (__pthread_cond_signal, (pthread_cond_t *cond), (cond), 0)
 139 versioned_symbol (libc, __pthread_cond_signal, pthread_cond_signal,
 140                   GLIBC_2_3_2);
 141
 142 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 143 FORWARD2 (__pthread_cond_wait_2_0, int attribute_compat_text_section,
 144           (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex), (cond, mutex),
 145           return 0)
 146 compat_symbol (libc, __pthread_cond_wait_2_0, pthread_cond_wait,
 147                GLIBC_2_0);
 148 #endif
 149 FORWARD (__pthread_cond_wait, (pthread_cond_t *cond, pthread_mutex_t *mutex),
 150          (cond, mutex), 0)
 151 versioned_symbol (libc, __pthread_cond_wait, pthread_cond_wait,
 152                   GLIBC_2_3_2);
 153
 154 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 155 FORWARD2 (__pthread_cond_timedwait_2_0, int attribute_compat_text_section,
 156           (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex,
 157            const struct timespec *abstime), (cond, mutex, abstime),
 158           return 0)
 159 compat_symbol (libc, __pthread_cond_timedwait_2_0, pthread_cond_timedwait,
 160                GLIBC_2_0);
 161 #endif
 162 FORWARD (__pthread_cond_timedwait,
 163          (pthread_cond_t *cond, pthread_mutex_t *mutex,
 164           const struct timespec *abstime), (cond, mutex, abstime), 0)
 165 versioned_symbol (libc, __pthread_cond_timedwait, pthread_cond_timedwait,
 166                   GLIBC_2_3_2);
 167
 168
 169 FORWARD (pthread_equal, (pthread_t thread1, pthread_t thread2),
 170          (thread1, thread2), 1)
 171
 172
 173 FORWARD_NORETURN (__pthread_exit, void, (void *retval), (retval),
 174                   exit (EXIT_SUCCESS))
 175 strong_alias (__pthread_exit, pthread_exit);
 176
 177
 178 FORWARD (pthread_getschedparam,
 179          (pthread_t target_thread, int *policy, struct sched_param *param),
 180          (target_thread, policy, param), 0)
 181 FORWARD (pthread_setschedparam,
 182          (pthread_t target_thread, int policy,
 183           const struct sched_param *param), (target_thread, policy, param), 0)
 184
 185
 186 FORWARD (pthread_mutex_destroy, (pthread_mutex_t *mutex), (mutex), 0)
 187
 188 FORWARD (pthread_mutex_init,
 189          (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr),
 190          (mutex, mutexattr), 0)
 191
 192 FORWARD (pthread_mutex_lock, (pthread_mutex_t *mutex), (mutex), 0)
 193
 194 FORWARD (pthread_mutex_unlock, (pthread_mutex_t *mutex), (mutex), 0)
 195
 196
 197 FORWARD2 (pthread_self, pthread_t, (void), (), return 0)
 198
 199
 200 FORWARD (__pthread_setcancelstate, (int state, int *oldstate),
 201          (state, oldstate), 0)
 202 strong_alias (__pthread_setcancelstate, pthread_setcancelstate)
 203
 204 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 205
 206 FORWARD_NORETURN (__pthread_unwind,
 207                   void attribute_hidden __attribute ((noreturn))
 208                   __cleanup_fct_attribute attribute_compat_text_section,
 209                   (__pthread_unwind_buf_t *buf), (buf),
 210                   __safe_fatal ())