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 } 320