1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <signal.h> 33#include <pthread.h> 34#include <stdlib.h> 35#include <errno.h> 36 37#include "libc_private.h" 38 39/* 40 * Weak symbols: All libc internal usage of these functions should 41 * use the weak symbol versions (_pthread_XXX). If libpthread is 42 * linked, it will override these functions with (non-weak) routines. 43 * The _pthread_XXX functions are provided solely for internal libc 44 * usage to avoid unwanted cancellation points and to differentiate 45 * between application locks and libc locks (threads holding the 46 * latter can't be allowed to exit/terminate). 47 */ 48 49/* Define a null pthread structure just to satisfy _pthread_self. */ 50struct pthread { 51}; 52 53static struct pthread main_thread; 54 55static int stub_main(void); 56static void *stub_null(void); 57static struct pthread *stub_self(void); 58static int stub_zero(void); 59static int stub_fail(void); 60static int stub_true(void); 61static void stub_exit(void); 62static int stub_esrch(void); 63 64#define PJT_DUAL_ENTRY(entry) \ 65 (pthread_func_t)entry, (pthread_func_t)entry 66 67pthread_func_entry_t __thr_jtable[PJT_MAX] = { 68 [PJT_ATFORK] = {PJT_DUAL_ENTRY(stub_zero)}, 69 [PJT_ATTR_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, 70 [PJT_ATTR_GETDETACHSTATE] = {PJT_DUAL_ENTRY(stub_zero)}, 71 [PJT_ATTR_GETGUARDSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, 72 [PJT_ATTR_GETINHERITSCHED] = {PJT_DUAL_ENTRY(stub_zero)}, 73 [PJT_ATTR_GETSCHEDPARAM] = {PJT_DUAL_ENTRY(stub_zero)}, 74 [PJT_ATTR_GETSCHEDPOLICY] = {PJT_DUAL_ENTRY(stub_zero)}, 75 [PJT_ATTR_GETSCOPE] = {PJT_DUAL_ENTRY(stub_zero)}, 76 [PJT_ATTR_GETSTACKADDR] = {PJT_DUAL_ENTRY(stub_zero)}, 77 [PJT_ATTR_GETSTACKSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, 78 [PJT_ATTR_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, 79 [PJT_ATTR_SETDETACHSTATE] = {PJT_DUAL_ENTRY(stub_zero)}, 80 [PJT_ATTR_SETGUARDSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, 81 [PJT_ATTR_SETINHERITSCHED] = {PJT_DUAL_ENTRY(stub_zero)}, 82 [PJT_ATTR_SETSCHEDPARAM] = {PJT_DUAL_ENTRY(stub_zero)}, 83 [PJT_ATTR_SETSCHEDPOLICY] = {PJT_DUAL_ENTRY(stub_zero)}, 84 [PJT_ATTR_SETSCOPE] = {PJT_DUAL_ENTRY(stub_zero)}, 85 [PJT_ATTR_SETSTACKADDR] = {PJT_DUAL_ENTRY(stub_zero)}, 86 [PJT_ATTR_SETSTACKSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, 87 [PJT_CANCEL] = {PJT_DUAL_ENTRY(stub_zero)}, 88 [PJT_CLEANUP_POP] = {PJT_DUAL_ENTRY(stub_zero)}, 89 [PJT_CLEANUP_PUSH] = {PJT_DUAL_ENTRY(stub_zero)}, 90 [PJT_COND_BROADCAST] = {PJT_DUAL_ENTRY(stub_zero)}, 91 [PJT_COND_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, 92 [PJT_COND_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, 93 [PJT_COND_SIGNAL] = {PJT_DUAL_ENTRY(stub_zero)}, 94 [PJT_COND_TIMEDWAIT] = {PJT_DUAL_ENTRY(stub_zero)}, 95 [PJT_COND_WAIT] = {PJT_DUAL_ENTRY(stub_zero)}, 96 [PJT_DETACH] = {PJT_DUAL_ENTRY(stub_zero)}, 97 [PJT_EQUAL] = {PJT_DUAL_ENTRY(stub_true)}, 98 [PJT_EXIT] = {PJT_DUAL_ENTRY(stub_exit)}, 99 [PJT_GETSPECIFIC] = {PJT_DUAL_ENTRY(stub_null)}, 100 [PJT_JOIN] = {PJT_DUAL_ENTRY(stub_zero)}, 101 [PJT_KEY_CREATE] = {PJT_DUAL_ENTRY(stub_fail)}, 102 [PJT_KEY_DELETE] = {PJT_DUAL_ENTRY(stub_zero)}, 103 [PJT_KILL] = {PJT_DUAL_ENTRY(stub_zero)}, 104 [PJT_MAIN_NP] = {PJT_DUAL_ENTRY(stub_main)}, 105 [PJT_MUTEXATTR_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, 106 [PJT_MUTEXATTR_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, 107 [PJT_MUTEXATTR_SETTYPE] = {PJT_DUAL_ENTRY(stub_zero)}, 108 [PJT_MUTEX_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, 109 [PJT_MUTEX_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, 110 [PJT_MUTEX_LOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 111 [PJT_MUTEX_TRYLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 112 [PJT_MUTEX_UNLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 113 [PJT_ONCE] = {PJT_DUAL_ENTRY(stub_fail)}, 114 [PJT_RWLOCK_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, 115 [PJT_RWLOCK_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, 116 [PJT_RWLOCK_RDLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 117 [PJT_RWLOCK_TRYRDLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 118 [PJT_RWLOCK_TRYWRLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 119 [PJT_RWLOCK_UNLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 120 [PJT_RWLOCK_WRLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, 121 [PJT_SELF] = {PJT_DUAL_ENTRY(stub_self)}, 122 [PJT_SETCANCELSTATE] = {PJT_DUAL_ENTRY(stub_zero)}, 123 [PJT_SETCANCELTYPE] = {PJT_DUAL_ENTRY(stub_zero)}, 124 [PJT_SETSPECIFIC] = {PJT_DUAL_ENTRY(stub_zero)}, 125 [PJT_SIGMASK] = {PJT_DUAL_ENTRY(stub_zero)}, 126 [PJT_TESTCANCEL] = {PJT_DUAL_ENTRY(stub_zero)}, 127 [PJT_CLEANUP_POP_IMP] = {PJT_DUAL_ENTRY(stub_zero)}, 128 [PJT_CLEANUP_PUSH_IMP] = {PJT_DUAL_ENTRY(stub_zero)}, 129 [PJT_CANCEL_ENTER] = {PJT_DUAL_ENTRY(stub_zero)}, 130 [PJT_CANCEL_LEAVE] = {PJT_DUAL_ENTRY(stub_zero)}, 131 [PJT_MUTEX_CONSISTENT] = {PJT_DUAL_ENTRY(stub_zero)}, 132 [PJT_MUTEXATTR_GETROBUST] = {PJT_DUAL_ENTRY(stub_zero)}, 133 [PJT_MUTEXATTR_SETROBUST] = {PJT_DUAL_ENTRY(stub_zero)}, 134 [PJT_GETTHREADID_NP] = {PJT_DUAL_ENTRY(stub_zero)}, 135 [PJT_ATTR_GET_NP] = {PJT_DUAL_ENTRY(stub_esrch)}, 136}; 137 138/* 139 * Weak aliases for exported (pthread_*) and internal (_pthread_*) routines. 140 */ 141#define WEAK_REF(sym, alias) __weak_reference(sym, alias) 142 143#define FUNC_TYPE(name) __CONCAT(name, _func_t) 144#define FUNC_INT(name) __CONCAT(name, _int) 145#define FUNC_EXP(name) __CONCAT(name, _exp) 146 147#define STUB_FUNC(name, idx, ret) \ 148 static ret FUNC_EXP(name)(void) __used; \ 149 static ret FUNC_INT(name)(void) __used; \ 150 WEAK_REF(FUNC_EXP(name), name); \ 151 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 152 typedef ret (*FUNC_TYPE(name))(void); \ 153 static ret FUNC_EXP(name)(void) \ 154 { \ 155 FUNC_TYPE(name) func; \ 156 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 157 return (func()); \ 158 } \ 159 static ret FUNC_INT(name)(void) \ 160 { \ 161 FUNC_TYPE(name) func; \ 162 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 163 return (func()); \ 164 } 165 166#define STUB_FUNC1(name, idx, ret, p0_type) \ 167 static ret FUNC_EXP(name)(p0_type) __used; \ 168 static ret FUNC_INT(name)(p0_type) __used; \ 169 WEAK_REF(FUNC_EXP(name), name); \ 170 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 171 typedef ret (*FUNC_TYPE(name))(p0_type); \ 172 static ret FUNC_EXP(name)(p0_type p0) \ 173 { \ 174 FUNC_TYPE(name) func; \ 175 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 176 return (func(p0)); \ 177 } \ 178 static ret FUNC_INT(name)(p0_type p0) \ 179 { \ 180 FUNC_TYPE(name) func; \ 181 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 182 return (func(p0)); \ 183 } 184 185#define STUB_FUNC2(name, idx, ret, p0_type, p1_type) \ 186 static ret FUNC_EXP(name)(p0_type, p1_type) __used; \ 187 static ret FUNC_INT(name)(p0_type, p1_type) __used; \ 188 WEAK_REF(FUNC_EXP(name), name); \ 189 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 190 typedef ret (*FUNC_TYPE(name))(p0_type, p1_type); \ 191 static ret FUNC_EXP(name)(p0_type p0, p1_type p1) \ 192 { \ 193 FUNC_TYPE(name) func; \ 194 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 195 return (func(p0, p1)); \ 196 } \ 197 static ret FUNC_INT(name)(p0_type p0, p1_type p1) \ 198 { \ 199 FUNC_TYPE(name) func; \ 200 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 201 return (func(p0, p1)); \ 202 } 203 204#define STUB_FUNC3(name, idx, ret, p0_type, p1_type, p2_type) \ 205 static ret FUNC_EXP(name)(p0_type, p1_type, p2_type) __used; \ 206 static ret FUNC_INT(name)(p0_type, p1_type, p2_type) __used; \ 207 WEAK_REF(FUNC_EXP(name), name); \ 208 WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ 209 typedef ret (*FUNC_TYPE(name))(p0_type, p1_type, p2_type); \ 210 static ret FUNC_EXP(name)(p0_type p0, p1_type p1, p2_type p2) \ 211 { \ 212 FUNC_TYPE(name) func; \ 213 func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ 214 return (func(p0, p1, p2)); \ 215 } \ 216 static ret FUNC_INT(name)(p0_type p0, p1_type p1, p2_type p2) \ 217 { \ 218 FUNC_TYPE(name) func; \ 219 func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ 220 return (func(p0, p1, p2)); \ 221 } 222 223STUB_FUNC1(pthread_cond_broadcast, PJT_COND_BROADCAST, int, void *) 224STUB_FUNC1(pthread_cond_destroy, PJT_COND_DESTROY, int, void *) 225STUB_FUNC2(pthread_cond_init, PJT_COND_INIT, int, void *, void *) 226STUB_FUNC1(pthread_cond_signal, PJT_COND_SIGNAL, int, void *) 227STUB_FUNC2(pthread_cond_wait, PJT_COND_WAIT, int, void *, void *) 228STUB_FUNC1(pthread_getspecific, PJT_GETSPECIFIC, void *, pthread_key_t) 229STUB_FUNC2(pthread_key_create, PJT_KEY_CREATE, int, void *, void *) 230STUB_FUNC1(pthread_key_delete, PJT_KEY_DELETE, int, pthread_key_t) 231STUB_FUNC(pthread_main_np, PJT_MAIN_NP, int) 232STUB_FUNC1(pthread_mutex_destroy, PJT_MUTEX_DESTROY, int, void *) 233STUB_FUNC2(pthread_mutex_init, PJT_MUTEX_INIT, int, void *, void *) 234STUB_FUNC1(pthread_mutex_lock, PJT_MUTEX_LOCK, int, void *) 235STUB_FUNC1(pthread_mutex_trylock, PJT_MUTEX_TRYLOCK, int, void *) 236STUB_FUNC1(pthread_mutex_unlock, PJT_MUTEX_UNLOCK, int, void *) 237STUB_FUNC1(pthread_mutex_consistent, PJT_MUTEX_CONSISTENT, int, void *) 238STUB_FUNC1(pthread_mutexattr_destroy, PJT_MUTEXATTR_DESTROY, int, void *) 239STUB_FUNC1(pthread_mutexattr_init, PJT_MUTEXATTR_INIT, int, void *) 240STUB_FUNC2(pthread_mutexattr_settype, PJT_MUTEXATTR_SETTYPE, int, void *, int) 241STUB_FUNC2(pthread_mutexattr_getrobust, PJT_MUTEXATTR_GETROBUST, int, void *, 242 int *) 243STUB_FUNC2(pthread_mutexattr_setrobust, PJT_MUTEXATTR_SETROBUST, int, void *, 244 int) 245STUB_FUNC2(pthread_once, PJT_ONCE, int, void *, void *) 246STUB_FUNC1(pthread_rwlock_destroy, PJT_RWLOCK_DESTROY, int, void *) 247STUB_FUNC2(pthread_rwlock_init, PJT_RWLOCK_INIT, int, void *, void *) 248STUB_FUNC1(pthread_rwlock_rdlock, PJT_RWLOCK_RDLOCK, int, void *) 249STUB_FUNC1(pthread_rwlock_tryrdlock, PJT_RWLOCK_TRYRDLOCK, int, void *) 250STUB_FUNC1(pthread_rwlock_trywrlock, PJT_RWLOCK_TRYWRLOCK, int, void *) 251STUB_FUNC1(pthread_rwlock_unlock, PJT_RWLOCK_UNLOCK, int, void *) 252STUB_FUNC1(pthread_rwlock_wrlock, PJT_RWLOCK_WRLOCK, int, void *) 253STUB_FUNC(pthread_self, PJT_SELF, pthread_t) 254STUB_FUNC(pthread_getthreadid_np, PJT_GETTHREADID_NP, int) 255STUB_FUNC2(pthread_setspecific, PJT_SETSPECIFIC, int, pthread_key_t, void *) 256STUB_FUNC3(pthread_sigmask, PJT_SIGMASK, int, int, void *, void *) 257STUB_FUNC3(pthread_atfork, PJT_ATFORK, int, void *, void *, void*) 258STUB_FUNC1(pthread_attr_destroy, PJT_ATTR_DESTROY, int, void *); 259STUB_FUNC2(pthread_attr_getdetachstate, PJT_ATTR_GETDETACHSTATE, int, void *, void *) 260STUB_FUNC2(pthread_attr_getguardsize, PJT_ATTR_GETGUARDSIZE, int, void *, void *) 261STUB_FUNC2(pthread_attr_getstackaddr, PJT_ATTR_GETSTACKADDR, int, void *, void *) 262STUB_FUNC2(pthread_attr_getstacksize, PJT_ATTR_GETSTACKSIZE, int, void *, void *) 263STUB_FUNC2(pthread_attr_getinheritsched, PJT_ATTR_GETINHERITSCHED, int, void *, void *) 264STUB_FUNC2(pthread_attr_getschedparam, PJT_ATTR_GETSCHEDPARAM, int, void *, void *) 265STUB_FUNC2(pthread_attr_getschedpolicy, PJT_ATTR_GETSCHEDPOLICY, int, void *, void *) 266STUB_FUNC2(pthread_attr_getscope, PJT_ATTR_GETSCOPE, int, void *, void *) 267STUB_FUNC1(pthread_attr_init, PJT_ATTR_INIT, int, void *) 268STUB_FUNC2(pthread_attr_setdetachstate, PJT_ATTR_SETDETACHSTATE, int, void *, int) 269STUB_FUNC2(pthread_attr_setguardsize, PJT_ATTR_SETGUARDSIZE, int, void *, size_t) 270STUB_FUNC2(pthread_attr_setstackaddr, PJT_ATTR_SETSTACKADDR, int, void *, void *) 271STUB_FUNC2(pthread_attr_setstacksize, PJT_ATTR_SETSTACKSIZE, int, void *, size_t) 272STUB_FUNC2(pthread_attr_setinheritsched, PJT_ATTR_SETINHERITSCHED, int, void *, int) 273STUB_FUNC2(pthread_attr_setschedparam, PJT_ATTR_SETSCHEDPARAM, int, void *, void *) 274STUB_FUNC2(pthread_attr_setschedpolicy, PJT_ATTR_SETSCHEDPOLICY, int, void *, int) 275STUB_FUNC2(pthread_attr_setscope, PJT_ATTR_SETSCOPE, int, void *, int) 276STUB_FUNC1(pthread_cancel, PJT_CANCEL, int, void *) 277STUB_FUNC1(pthread_cleanup_pop, PJT_CLEANUP_POP, int, int) 278STUB_FUNC2(pthread_cleanup_push, PJT_CLEANUP_PUSH, void, void *, void *) 279STUB_FUNC3(pthread_cond_timedwait, PJT_COND_TIMEDWAIT, int, void *, void *, void *) 280STUB_FUNC1(pthread_detach, PJT_DETACH, int, void *) 281STUB_FUNC2(pthread_equal, PJT_EQUAL, int, void *, void *) 282STUB_FUNC1(pthread_exit, PJT_EXIT, void, void *) 283STUB_FUNC2(pthread_join, PJT_JOIN, int, void *, void *) 284STUB_FUNC2(pthread_kill, PJT_KILL, int, void *, int) 285STUB_FUNC2(pthread_setcancelstate, PJT_SETCANCELSTATE, int, int, void *) 286STUB_FUNC2(pthread_setcanceltype, PJT_SETCANCELTYPE, int, int, void *) 287STUB_FUNC(pthread_testcancel, PJT_TESTCANCEL, void) 288STUB_FUNC1(__pthread_cleanup_pop_imp, PJT_CLEANUP_POP_IMP, void, int) 289STUB_FUNC3(__pthread_cleanup_push_imp, PJT_CLEANUP_PUSH_IMP, void, void *, 290 void *, void *) 291STUB_FUNC1(_pthread_cancel_enter, PJT_CANCEL_ENTER, void, int) 292STUB_FUNC1(_pthread_cancel_leave, PJT_CANCEL_LEAVE, void, int) 293STUB_FUNC2(pthread_attr_get_np, PJT_ATTR_GET_NP, int, pthread_t, pthread_attr_t *) 294 295static int 296stub_zero(void) 297{ 298 return (0); 299} 300 301static void * 302stub_null(void) 303{ 304 return (NULL); 305} 306 307static struct pthread * 308stub_self(void) 309{ 310 return (&main_thread); 311} 312 313static int 314stub_fail(void) 315{ 316 return (ENOSYS); 317} 318 319static int 320stub_main(void) 321{ 322 return (-1); 323} 324 325static int 326stub_true(void) 327{ 328 return (1); 329} 330 331static void 332stub_exit(void) 333{ 334 exit(0); 335} 336 337static int 338stub_esrch(void) 339{ 340 return (ESRCH); 341} 342