lib/libc/gen/_pthread_stubs.c

   1 /*
   2  * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS''
  15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <signal.h>
  31 #include <pthread.h>
  32 #include <stdlib.h>
  33 #include <errno.h>
  34
  35 #include "libc_private.h"
  36
  37 /*
  38  * Weak symbols: All libc internal usage of these functions should
  39  * use the weak symbol versions (_pthread_XXX).  If libpthread is
  40  * linked, it will override these functions with (non-weak) routines.
  41  * The _pthread_XXX functions are provided solely for internal libc
  42  * usage to avoid unwanted cancellation points and to differentiate
  43  * between application locks and libc locks (threads holding the
  44  * latter can't be allowed to exit/terminate).
  45  */
  46
  47 /* Define a null pthread structure just to satisfy _pthread_self. */
  48 struct pthread {
  49 };
  50
  51 static struct pthread   main_thread;
  52
  53 static int              stub_main(void);
  54 static void             *stub_null(void);
  55 static struct pthread   *stub_self(void);
  56 static int              stub_zero(void);
  57 static int              stub_fail(void);
  58 static int              stub_true(void);
  59 static void             stub_exit(void);
  60
  61 #define PJT_DUAL_ENTRY(entry)   \
  62         (pthread_func_t)entry, (pthread_func_t)entry
  63
  64 pthread_func_entry_t __thr_jtable[PJT_MAX] = {
  65         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATFORK */
  66         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_DESTROY */
  67         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETDETACHSTATE */
  68         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETGUARDSIZE */
  69         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETINHERITSCHED */
  70         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETSCHEDPARAM */
  71         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETSCHEDPOLICY */
  72         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETSCOPE */
  73         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETSTACKADDR */
  74         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_GETSTACKSIZE */
  75         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_INIT */
  76         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETDETACHSTATE */
  77         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETGUARDSIZE */
  78         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETINHERITSCHED */
  79         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETSCHEDPARAM */
  80         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETSCHEDPOLICY */
  81         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETSCOPE */
  82         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETSTACKADDR */
  83         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_ATTR_SETSTACKSIZE */
  84         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CANCEL */
  85         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CLEANUP_POP */
  86         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CLEANUP_PUSH */
  87         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_COND_BROADCAST */
  88         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_COND_DESTROY */
  89         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_COND_INIT */
  90         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_COND_SIGNAL */
  91         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_COND_TIMEDWAIT */
  92         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_COND_WAIT */
  93         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_DETACH */
  94         {PJT_DUAL_ENTRY(stub_true)},    /* PJT_EQUAL */
  95         {PJT_DUAL_ENTRY(stub_exit)},    /* PJT_EXIT */
  96         {PJT_DUAL_ENTRY(stub_null)},    /* PJT_GETSPECIFIC */
  97         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_JOIN */
  98         {PJT_DUAL_ENTRY(stub_fail)},    /* PJT_KEY_CREATE */
  99         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_KEY_DELETE */
 100         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_KILL */
 101         {PJT_DUAL_ENTRY(stub_main)},    /* PJT_MAIN_NP */
 102         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEXATTR_DESTROY */
 103         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEXATTR_INIT */
 104         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEXATTR_SETTYPE */
 105         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEX_DESTROY */
 106         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEX_INIT */
 107         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEX_LOCK */
 108         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEX_TRYLOCK */
 109         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_MUTEX_UNLOCK */
 110         {PJT_DUAL_ENTRY(stub_fail)},    /* PJT_ONCE */
 111         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_DESTROY */
 112         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_INIT */
 113         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_RDLOCK */
 114         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_TRYRDLOCK */
 115         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_TRYWRLOCK */
 116         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_UNLOCK */
 117         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_RWLOCK_WRLOCK */
 118         {PJT_DUAL_ENTRY(stub_self)},    /* PJT_SELF */
 119         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_SETCANCELSTATE */
 120         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_SETCANCELTYPE */
 121         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_SETSPECIFIC */
 122         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_SIGMASK */
 123         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_TESTCANCEL */
 124         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CLEANUP_POP_IMP */
 125         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CLEANUP_PUSH_IMP */
 126         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CANCEL_ENTER */
 127         {PJT_DUAL_ENTRY(stub_zero)},    /* PJT_CANCEL_LEAVE */
 128 };
 129
 130 /*
 131  * Weak aliases for exported (pthread_*) and internal (_pthread_*) routines.
 132  */
 133 #define WEAK_REF(sym, alias)    __weak_reference(sym, alias)
 134
 135 #define FUNC_TYPE(name)         __CONCAT(name, _func_t)
 136 #define FUNC_INT(name)          __CONCAT(name, _int)
 137 #define FUNC_EXP(name)          __CONCAT(name, _exp)
 138
 139 #define STUB_FUNC(name, idx, ret)                               \
 140         static ret FUNC_EXP(name)(void) __used;                 \
 141         static ret FUNC_INT(name)(void) __used;                 \
 142         WEAK_REF(FUNC_EXP(name), name);                         \
 143         WEAK_REF(FUNC_INT(name), __CONCAT(_, name));            \
 144         typedef ret (*FUNC_TYPE(name))(void);                   \
 145         static ret FUNC_EXP(name)(void)                         \
 146         {                                                       \
 147                 FUNC_TYPE(name) func;                           \
 148                 func = (FUNC_TYPE(name))__thr_jtable[idx][0];   \
 149                 return (func());                                \
 150         }                                                       \
 151         static ret FUNC_INT(name)(void)                         \
 152         {                                                       \
 153                 FUNC_TYPE(name) func;                           \
 154                 func = (FUNC_TYPE(name))__thr_jtable[idx][1];   \
 155                 return (func());                                \
 156         }
 157
 158 #define STUB_FUNC1(name, idx, ret, p0_type)                     \
 159         static ret FUNC_EXP(name)(p0_type) __used;              \
 160         static ret FUNC_INT(name)(p0_type) __used;              \
 161         WEAK_REF(FUNC_EXP(name), name);                         \
 162         WEAK_REF(FUNC_INT(name), __CONCAT(_, name));            \
 163         typedef ret (*FUNC_TYPE(name))(p0_type);                \
 164         static ret FUNC_EXP(name)(p0_type p0)                   \
 165         {                                                       \
 166                 FUNC_TYPE(name) func;                           \
 167                 func = (FUNC_TYPE(name))__thr_jtable[idx][0];   \
 168                 return (func(p0));                              \
 169         }                                                       \
 170         static ret FUNC_INT(name)(p0_type p0)                   \
 171         {                                                       \
 172                 FUNC_TYPE(name) func;                           \
 173                 func = (FUNC_TYPE(name))__thr_jtable[idx][1];   \
 174                 return (func(p0));                              \
 175         }
 176
 177 #define STUB_FUNC2(name, idx, ret, p0_type, p1_type)            \
 178         static ret FUNC_EXP(name)(p0_type, p1_type) __used;     \
 179         static ret FUNC_INT(name)(p0_type, p1_type) __used;     \
 180         WEAK_REF(FUNC_EXP(name), name);                         \
 181         WEAK_REF(FUNC_INT(name), __CONCAT(_, name));            \
 182         typedef ret (*FUNC_TYPE(name))(p0_type, p1_type);       \
 183         static ret FUNC_EXP(name)(p0_type p0, p1_type p1)       \
 184         {                                                       \
 185                 FUNC_TYPE(name) func;                           \
 186                 func = (FUNC_TYPE(name))__thr_jtable[idx][0];   \
 187                 return (func(p0, p1));                          \
 188         }                                                       \
 189         static ret FUNC_INT(name)(p0_type p0, p1_type p1)       \
 190         {                                                       \
 191                 FUNC_TYPE(name) func;                           \
 192                 func = (FUNC_TYPE(name))__thr_jtable[idx][1];   \
 193                 return (func(p0, p1));                          \
 194         }
 195
 196 #define STUB_FUNC3(name, idx, ret, p0_type, p1_type, p2_type)   \
 197         static ret FUNC_EXP(name)(p0_type, p1_type, p2_type) __used; \
 198         static ret FUNC_INT(name)(p0_type, p1_type, p2_type) __used; \
 199         WEAK_REF(FUNC_EXP(name), name);                         \
 200         WEAK_REF(FUNC_INT(name), __CONCAT(_, name));            \
 201         typedef ret (*FUNC_TYPE(name))(p0_type, p1_type, p2_type); \
 202         static ret FUNC_EXP(name)(p0_type p0, p1_type p1, p2_type p2) \
 203         {                                                       \
 204                 FUNC_TYPE(name) func;                           \
 205                 func = (FUNC_TYPE(name))__thr_jtable[idx][0];   \
 206                 return (func(p0, p1, p2));                      \
 207         }                                                       \
 208         static ret FUNC_INT(name)(p0_type p0, p1_type p1, p2_type p2) \
 209         {                                                       \
 210                 FUNC_TYPE(name) func;                           \
 211                 func = (FUNC_TYPE(name))__thr_jtable[idx][1];   \
 212                 return (func(p0, p1, p2));                      \
 213         }
 214
 215 STUB_FUNC1(pthread_cond_broadcast, PJT_COND_BROADCAST, int, void *)
 216 STUB_FUNC1(pthread_cond_destroy, PJT_COND_DESTROY, int, void *)
 217 STUB_FUNC2(pthread_cond_init,   PJT_COND_INIT, int, void *, void *)
 218 STUB_FUNC1(pthread_cond_signal, PJT_COND_SIGNAL, int, void *)
 219 STUB_FUNC2(pthread_cond_wait,   PJT_COND_WAIT, int, void *, void *)
 220 STUB_FUNC1(pthread_getspecific, PJT_GETSPECIFIC, void *, pthread_key_t)
 221 STUB_FUNC2(pthread_key_create,  PJT_KEY_CREATE, int, void *, void *)
 222 STUB_FUNC1(pthread_key_delete,  PJT_KEY_DELETE, int, pthread_key_t)
 223 STUB_FUNC(pthread_main_np,      PJT_MAIN_NP, int)
 224 STUB_FUNC1(pthread_mutex_destroy, PJT_MUTEX_DESTROY, int, void *)
 225 STUB_FUNC2(pthread_mutex_init,  PJT_MUTEX_INIT, int, void *, void *)
 226 STUB_FUNC1(pthread_mutex_lock,  PJT_MUTEX_LOCK, int, void *)
 227 STUB_FUNC1(pthread_mutex_trylock, PJT_MUTEX_TRYLOCK, int, void *)
 228 STUB_FUNC1(pthread_mutex_unlock, PJT_MUTEX_UNLOCK, int, void *)
 229 STUB_FUNC1(pthread_mutexattr_destroy, PJT_MUTEXATTR_DESTROY, int, void *)
 230 STUB_FUNC1(pthread_mutexattr_init, PJT_MUTEXATTR_INIT, int, void *)
 231 STUB_FUNC2(pthread_mutexattr_settype, PJT_MUTEXATTR_SETTYPE, int, void *, int)
 232 STUB_FUNC2(pthread_once,        PJT_ONCE, int, void *, void *)
 233 STUB_FUNC1(pthread_rwlock_destroy, PJT_RWLOCK_DESTROY, int, void *)
 234 STUB_FUNC2(pthread_rwlock_init, PJT_RWLOCK_INIT, int, void *, void *)
 235 STUB_FUNC1(pthread_rwlock_rdlock, PJT_RWLOCK_RDLOCK, int, void *)
 236 STUB_FUNC1(pthread_rwlock_tryrdlock, PJT_RWLOCK_TRYRDLOCK, int, void *)
 237 STUB_FUNC1(pthread_rwlock_trywrlock, PJT_RWLOCK_TRYWRLOCK, int, void *)
 238 STUB_FUNC1(pthread_rwlock_unlock, PJT_RWLOCK_UNLOCK, int, void *)
 239 STUB_FUNC1(pthread_rwlock_wrlock, PJT_RWLOCK_WRLOCK, int, void *)
 240 STUB_FUNC(pthread_self,         PJT_SELF, pthread_t)
 241 STUB_FUNC2(pthread_setspecific, PJT_SETSPECIFIC, int, pthread_key_t, void *)
 242 STUB_FUNC3(pthread_sigmask, PJT_SIGMASK, int, int, void *, void *)
 243 STUB_FUNC3(pthread_atfork, PJT_ATFORK, int, void *, void *, void*)
 244 STUB_FUNC1(pthread_attr_destroy, PJT_ATTR_DESTROY, int, void *);
 245 STUB_FUNC2(pthread_attr_getdetachstate, PJT_ATTR_GETDETACHSTATE, int, void *, void *)
 246 STUB_FUNC2(pthread_attr_getguardsize, PJT_ATTR_GETGUARDSIZE, int, void *, void *)
 247 STUB_FUNC2(pthread_attr_getstackaddr, PJT_ATTR_GETSTACKADDR, int, void *, void *)
 248 STUB_FUNC2(pthread_attr_getstacksize, PJT_ATTR_GETSTACKSIZE, int, void *, void *)
 249 STUB_FUNC2(pthread_attr_getinheritsched, PJT_ATTR_GETINHERITSCHED, int, void *, void *)
 250 STUB_FUNC2(pthread_attr_getschedparam, PJT_ATTR_GETSCHEDPARAM, int, void *, void *)
 251 STUB_FUNC2(pthread_attr_getschedpolicy, PJT_ATTR_GETSCHEDPOLICY, int, void *, void *)
 252 STUB_FUNC2(pthread_attr_getscope, PJT_ATTR_GETSCOPE, int, void *, void *)
 253 STUB_FUNC1(pthread_attr_init, PJT_ATTR_INIT, int, void *)
 254 STUB_FUNC2(pthread_attr_setdetachstate, PJT_ATTR_SETDETACHSTATE, int, void *, int)
 255 STUB_FUNC2(pthread_attr_setguardsize, PJT_ATTR_SETGUARDSIZE, int, void *, size_t)
 256 STUB_FUNC2(pthread_attr_setstackaddr, PJT_ATTR_SETSTACKADDR, int, void *, void *)
 257 STUB_FUNC2(pthread_attr_setstacksize, PJT_ATTR_SETSTACKSIZE, int, void *, size_t)
 258 STUB_FUNC2(pthread_attr_setinheritsched, PJT_ATTR_SETINHERITSCHED, int, void *, int)
 259 STUB_FUNC2(pthread_attr_setschedparam, PJT_ATTR_SETSCHEDPARAM, int, void *, void *)
 260 STUB_FUNC2(pthread_attr_setschedpolicy, PJT_ATTR_SETSCHEDPOLICY, int, void *, int)
 261 STUB_FUNC2(pthread_attr_setscope, PJT_ATTR_SETSCOPE, int, void *, int)
 262 STUB_FUNC1(pthread_cancel, PJT_CANCEL, int, void *)
 263 STUB_FUNC1(pthread_cleanup_pop, PJT_CLEANUP_POP, int, int)
 264 STUB_FUNC2(pthread_cleanup_push, PJT_CLEANUP_PUSH, void, void *, void *)
 265 STUB_FUNC3(pthread_cond_timedwait, PJT_COND_TIMEDWAIT, int, void *, void *, void *)
 266 STUB_FUNC1(pthread_detach, PJT_DETACH, int, void *)
 267 STUB_FUNC2(pthread_equal, PJT_EQUAL, int, void *, void *)
 268 STUB_FUNC1(pthread_exit, PJT_EXIT, void, void *)
 269 STUB_FUNC2(pthread_join, PJT_JOIN, int, void *, void *)
 270 STUB_FUNC2(pthread_kill, PJT_KILL, int, void *, int)
 271 STUB_FUNC2(pthread_setcancelstate, PJT_SETCANCELSTATE, int, int, void *)
 272 STUB_FUNC2(pthread_setcanceltype, PJT_SETCANCELTYPE, int, int, void *)
 273 STUB_FUNC(pthread_testcancel, PJT_TESTCANCEL, void)
 274 STUB_FUNC1(__pthread_cleanup_pop_imp, PJT_CLEANUP_POP_IMP, int, int)
 275 STUB_FUNC2(__pthread_cleanup_push_imp, PJT_CLEANUP_PUSH_IMP, void, void*, void *);
 276 STUB_FUNC1(_pthread_cancel_enter, PJT_CANCEL_ENTER, int, int)
 277 STUB_FUNC1(_pthread_cancel_leave, PJT_CANCEL_LEAVE, int, int)
 278
 279 static int
 280 stub_zero(void)
 281 {
 282         return (0);
 283 }
 284
 285 static void *
 286 stub_null(void)
 287 {
 288         return (NULL);
 289 }
 290
 291 static struct pthread *
 292 stub_self(void)
 293 {
 294         return (&main_thread);
 295 }
 296
 297 static int
 298 stub_fail(void)
 299 {
 300         return (ENOSYS);
 301 }
 302
 303 static int
 304 stub_main(void)
 305 {
 306         return (-1);
 307 }
 308
 309 static int
 310 stub_true(void)
 311 {
 312         return (1);
 313 }
 314
 315 static void
 316 stub_exit(void)
 317 {
 318         exit(0);
 319 }