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 34 #include "libc_private.h" 35 36 /* 37 * Weak symbols: All libc internal usage of these functions should 38 * use the weak symbol versions (_pthread_XXX). If libpthread is 39 * linked, it will override these functions with (non-weak) routines. 40 * The _pthread_XXX functions are provided solely for internal libc 41 * usage to avoid unwanted cancellation points and to differentiate 42 * between application locks and libc locks (threads holding the 43 * latter can't be allowed to exit/terminate). 44 */ 45 46 /* Define a null pthread structure just to satisfy _pthread_self. */ 47 struct pthread { 48 }; 49 50 static struct pthread main_thread; 51 52 static int stub_main(void); 53 static void *stub_null(void); 54 static struct pthread *stub_self(void); 55 static int stub_zero(void); 56 static int stub_true(void); 57 static void stub_exit(void); 58 59 #define PJT_DUAL_ENTRY(entry) \ 60 (pthread_func_t)entry, (pthread_func_t)entry 61 62 pthread_func_entry_t __thr_jtable[PJT_MAX] = { 63 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATFORK */ 64 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_DESTROY */ 65 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETDETACHSTATE */ 66 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETGUARDSIZE */ 67 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETINHERITSCHED */ 68 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSCHEDPARAM */ 69 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSCHEDPOLICY */ 70 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSCOPE */ 71 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSTACKADDR */ 72 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSTACKSIZE */ 73 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_INIT */ 74 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETDETACHSTATE */ 75 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETGUARDSIZE */ 76 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETINHERITSCHED */ 77 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSCHEDPARAM */ 78 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSCHEDPOLICY */ 79 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSCOPE */ 80 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSTACKADDR */ 81 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSTACKSIZE */ 82 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CANCEL */ 83 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CLEANUP_POP */ 84 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CLEANUP_PUSH */ 85 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_BROADCAST */ 86 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_DESTROY */ 87 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_INIT */ 88 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_SIGNAL */ 89 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_TIMEDWAIT */ 90 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_WAIT */ 91 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_DETACH */ 92 {PJT_DUAL_ENTRY(stub_true)}, /* PJT_EQUAL */ 93 {PJT_DUAL_ENTRY(stub_exit)}, /* PJT_EXIT */ 94 {PJT_DUAL_ENTRY(stub_null)}, /* PJT_GETSPECIFIC */ 95 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_JOIN */ 96 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_KEY_CREATE */ 97 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_KEY_DELETE */ 98 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_KILL */ 99 {PJT_DUAL_ENTRY(stub_main)}, /* PJT_MAIN_NP */ 100 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEXATTR_DESTROY */ 101 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEXATTR_INIT */ 102 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEXATTR_SETTYPE */ 103 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_DESTROY */ 104 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_INIT */ 105 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_LOCK */ 106 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_TRYLOCK */ 107 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_UNLOCK */ 108 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ONCE */ 109 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_DESTROY */ 110 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_INIT */ 111 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_RDLOCK */ 112 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_TRYRDLOCK */ 113 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_TRYWRLOCK */ 114 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_UNLOCK */ 115 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_WRLOCK */ 116 {PJT_DUAL_ENTRY(stub_self)}, /* PJT_SELF */ 117 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SETCANCELSTATE */ 118 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SETCANCELTYPE */ 119 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SETSPECIFIC */ 120 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SIGMASK */ 121 {PJT_DUAL_ENTRY(stub_zero)}, /* PJT_TESTCANCEL */ 122 }; 123 124 /* 125 * Weak aliases for exported (pthread_*) and internal (_pthread_*) routines. 126 */ 127 #define WEAK_REF(sym, alias) __weak_reference(sym, alias) 128 129 #define FUNC_TYPE(name) __CONCAT(name, _func_t) 130 #define FUNC_INT(name) __CONCAT(name, _int) 131 #define FUNC_EXP(name) __CONCAT(name, _exp) 132 133 #define STUB_FUNC(name, idx, ret) \ 134 static ret FUNC_EXP(name)(void) __used; \ 135 static ret FUNC_INT(name)(void) __used; \ 136 WEAK_REF(FUNC_EXP(name), name); \ 137 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 138 typedef ret (*FUNC_TYPE(name))(void); \ 139 static ret FUNC_EXP(name)(void) \ 140 { \ 141 FUNC_TYPE(name) func; \ 142 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 143 return (func()); \ 144 } \ 145 static ret FUNC_INT(name)(void) \ 146 { \ 147 FUNC_TYPE(name) func; \ 148 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 149 return (func()); \ 150 } 151 152 #define STUB_FUNC1(name, idx, ret, p0_type) \ 153 static ret FUNC_EXP(name)(p0_type) __used; \ 154 static ret FUNC_INT(name)(p0_type) __used; \ 155 WEAK_REF(FUNC_EXP(name), name); \ 156 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 157 typedef ret (*FUNC_TYPE(name))(p0_type); \ 158 static ret FUNC_EXP(name)(p0_type p0) \ 159 { \ 160 FUNC_TYPE(name) func; \ 161 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 162 return (func(p0)); \ 163 } \ 164 static ret FUNC_INT(name)(p0_type p0) \ 165 { \ 166 FUNC_TYPE(name) func; \ 167 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 168 return (func(p0)); \ 169 } 170 171 #define STUB_FUNC2(name, idx, ret, p0_type, p1_type) \ 172 static ret FUNC_EXP(name)(p0_type, p1_type) __used; \ 173 static ret FUNC_INT(name)(p0_type, p1_type) __used; \ 174 WEAK_REF(FUNC_EXP(name), name); \ 175 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 176 typedef ret (*FUNC_TYPE(name))(p0_type, p1_type); \ 177 static ret FUNC_EXP(name)(p0_type p0, p1_type p1) \ 178 { \ 179 FUNC_TYPE(name) func; \ 180 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 181 return (func(p0, p1)); \ 182 } \ 183 static ret FUNC_INT(name)(p0_type p0, p1_type p1) \ 184 { \ 185 FUNC_TYPE(name) func; \ 186 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 187 return (func(p0, p1)); \ 188 } 189 190 #define STUB_FUNC3(name, idx, ret, p0_type, p1_type, p2_type) \ 191 static ret FUNC_EXP(name)(p0_type, p1_type, p2_type) __used; \ 192 static ret FUNC_INT(name)(p0_type, p1_type, p2_type) __used; \ 193 WEAK_REF(FUNC_EXP(name), name); \ 194 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 195 typedef ret (*FUNC_TYPE(name))(p0_type, p1_type, p2_type); \ 196 static ret FUNC_EXP(name)(p0_type p0, p1_type p1, p2_type p2) \ 197 { \ 198 FUNC_TYPE(name) func; \ 199 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 200 return (func(p0, p1, p2)); \ 201 } \ 202 static ret FUNC_INT(name)(p0_type p0, p1_type p1, p2_type p2) \ 203 { \ 204 FUNC_TYPE(name) func; \ 205 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 206 return (func(p0, p1, p2)); \ 207 } 208 209 STUB_FUNC1(pthread_cond_broadcast, PJT_COND_BROADCAST, int, void *) 210 STUB_FUNC1(pthread_cond_destroy, PJT_COND_DESTROY, int, void *) 211 STUB_FUNC2(pthread_cond_init, PJT_COND_INIT, int, void *, void *) 212 STUB_FUNC1(pthread_cond_signal, PJT_COND_SIGNAL, int, void *) 213 STUB_FUNC2(pthread_cond_wait, PJT_COND_WAIT, int, void *, void *) 214 STUB_FUNC1(pthread_getspecific, PJT_GETSPECIFIC, void *, pthread_key_t) 215 STUB_FUNC2(pthread_key_create, PJT_KEY_CREATE, int, void *, void *) 216 STUB_FUNC1(pthread_key_delete, PJT_KEY_DELETE, int, pthread_key_t) 217 STUB_FUNC(pthread_main_np, PJT_MAIN_NP, int) 218 STUB_FUNC1(pthread_mutex_destroy, PJT_MUTEX_DESTROY, int, void *) 219 STUB_FUNC2(pthread_mutex_init, PJT_MUTEX_INIT, int, void *, void *) 220 STUB_FUNC1(pthread_mutex_lock, PJT_MUTEX_LOCK, int, void *) 221 STUB_FUNC1(pthread_mutex_trylock, PJT_MUTEX_TRYLOCK, int, void *) 222 STUB_FUNC1(pthread_mutex_unlock, PJT_MUTEX_UNLOCK, int, void *) 223 STUB_FUNC1(pthread_mutexattr_destroy, PJT_MUTEXATTR_DESTROY, int, void *) 224 STUB_FUNC1(pthread_mutexattr_init, PJT_MUTEXATTR_INIT, int, void *) 225 STUB_FUNC1(pthread_mutexattr_settype, PJT_MUTEXATTR_SETTYPE, int, void *) 226 STUB_FUNC2(pthread_once, PJT_ONCE, int, void *, void *) 227 STUB_FUNC1(pthread_rwlock_destroy, PJT_RWLOCK_DESTROY, int, void *) 228 STUB_FUNC2(pthread_rwlock_init, PJT_RWLOCK_INIT, int, void *, void *) 229 STUB_FUNC1(pthread_rwlock_rdlock, PJT_RWLOCK_RDLOCK, int, void *) 230 STUB_FUNC1(pthread_rwlock_tryrdlock, PJT_RWLOCK_TRYRDLOCK, int, void *) 231 STUB_FUNC1(pthread_rwlock_trywrlock, PJT_RWLOCK_TRYWRLOCK, int, void *) 232 STUB_FUNC1(pthread_rwlock_unlock, PJT_RWLOCK_UNLOCK, int, void *) 233 STUB_FUNC1(pthread_rwlock_wrlock, PJT_RWLOCK_WRLOCK, int, void *) 234 STUB_FUNC(pthread_self, PJT_SELF, pthread_t) 235 STUB_FUNC2(pthread_setspecific, PJT_SETSPECIFIC, int, pthread_key_t, void *) 236 STUB_FUNC3(pthread_sigmask, PJT_SIGMASK, int, int, void *, void *) 237 STUB_FUNC3(pthread_atfork, PJT_ATFORK, int, void *, void *, void*) 238 STUB_FUNC1(pthread_attr_destroy, PJT_ATTR_DESTROY, int, void *); 239 STUB_FUNC2(pthread_attr_getdetachstate, PJT_ATTR_GETDETACHSTATE, int, void *, void *) 240 STUB_FUNC2(pthread_attr_getguardsize, PJT_ATTR_GETGUARDSIZE, int, void *, void *) 241 STUB_FUNC2(pthread_attr_getstackaddr, PJT_ATTR_GETSTACKADDR, int, void *, void *) 242 STUB_FUNC2(pthread_attr_getstacksize, PJT_ATTR_GETSTACKSIZE, int, void *, void *) 243 STUB_FUNC2(pthread_attr_getinheritsched, PJT_ATTR_GETINHERITSCHED, int, void *, void *) 244 STUB_FUNC2(pthread_attr_getschedparam, PJT_ATTR_GETSCHEDPARAM, int, void *, void *) 245 STUB_FUNC2(pthread_attr_getschedpolicy, PJT_ATTR_GETSCHEDPOLICY, int, void *, void *) 246 STUB_FUNC2(pthread_attr_getscope, PJT_ATTR_GETSCOPE, int, void *, void *) 247 STUB_FUNC1(pthread_attr_init, PJT_ATTR_INIT, int, void *) 248 STUB_FUNC2(pthread_attr_setdetachstate, PJT_ATTR_SETDETACHSTATE, int, void *, int) 249 STUB_FUNC2(pthread_attr_setguardsize, PJT_ATTR_SETGUARDSIZE, int, void *, size_t) 250 STUB_FUNC2(pthread_attr_setstackaddr, PJT_ATTR_SETSTACKADDR, int, void *, void *) 251 STUB_FUNC2(pthread_attr_setstacksize, PJT_ATTR_SETSTACKSIZE, int, void *, size_t) 252 STUB_FUNC2(pthread_attr_setinheritsched, PJT_ATTR_SETINHERITSCHED, int, void *, int) 253 STUB_FUNC2(pthread_attr_setschedparam, PJT_ATTR_SETSCHEDPARAM, int, void *, void *) 254 STUB_FUNC2(pthread_attr_setschedpolicy, PJT_ATTR_SETSCHEDPOLICY, int, void *, int) 255 STUB_FUNC2(pthread_attr_setscope, PJT_ATTR_SETSCOPE, int, void *, int) 256 STUB_FUNC1(pthread_cancel, PJT_CANCEL, int, void *) 257 STUB_FUNC1(pthread_cleanup_pop, PJT_CLEANUP_POP, int, int) 258 STUB_FUNC2(pthread_cleanup_push, PJT_CLEANUP_PUSH, void, void *, void *) 259 STUB_FUNC3(pthread_cond_timedwait, PJT_COND_TIMEDWAIT, int, void *, void *, void *) 260 STUB_FUNC1(pthread_detach, PJT_DETACH, int, void *) 261 STUB_FUNC2(pthread_equal, PJT_EQUAL, int, void *, void *) 262 STUB_FUNC1(pthread_exit, PJT_EXIT, void, void *) 263 STUB_FUNC2(pthread_join, PJT_JOIN, int, void *, void *) 264 STUB_FUNC2(pthread_kill, PJT_KILL, int, void *, int) 265 STUB_FUNC2(pthread_setcancelstate, PJT_SETCANCELSTATE, int, int, void *) 266 STUB_FUNC2(pthread_setcanceltype, PJT_SETCANCELTYPE, int, int, void *) 267 STUB_FUNC(pthread_testcancel, PJT_TESTCANCEL, void) 268 269 static int 270 stub_zero(void) 271 { 272 return (0); 273 } 274 275 static void * 276 stub_null(void) 277 { 278 return (NULL); 279 } 280 281 static struct pthread * 282 stub_self(void) 283 { 284 return (&main_thread); 285 } 286 287 static int 288 stub_main(void) 289 { 290 return (-1); 291 } 292 293 static int 294 stub_true(void) 295 { 296 return (1); 297 } 298 299 static void 300 stub_exit(void) 301 { 302 exit(0); 303 } 304