diff options
Diffstat (limited to 'lib/libc/gen/_pthread_stubs.c')
| -rw-r--r-- | lib/libc/gen/_pthread_stubs.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/lib/libc/gen/_pthread_stubs.c b/lib/libc/gen/_pthread_stubs.c new file mode 100644 index 000000000000..d867ee4db51e --- /dev/null +++ b/lib/libc/gen/_pthread_stubs.c @@ -0,0 +1,363 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <signal.h> +#include <pthread.h> +#include <stdlib.h> +#include <errno.h> + +#include "libc_private.h" + +/* + * Weak symbols: All libc internal usage of these functions should + * use the weak symbol versions (_pthread_XXX). If libpthread is + * linked, it will override these functions with (non-weak) routines. + * The _pthread_XXX functions are provided solely for internal libc + * usage to avoid unwanted cancellation points and to differentiate + * between application locks and libc locks (threads holding the + * latter can't be allowed to exit/terminate). + */ + +/* Define a null pthread structure just to satisfy _pthread_self. */ +struct pthread { +}; + +static struct pthread main_thread; + +static int stub_main(void); +static void stub_void(void); +static void *stub_null(void); +static struct pthread *stub_self(void); +static int stub_zero(void); +static int stub_fail(void); +static int stub_true(void); +static void stub_exit(void); +static int stub_esrch(void); +static int stub_getname_np(pthread_t, char *, size_t); + +#define PJT_DUAL_ENTRY(entry) \ + (pthread_func_t)entry, (pthread_func_t)entry + +__attribute__((visibility("protected"))) +pthread_func_entry_t __thr_jtable[PJT_MAX] = { + [PJT_ATFORK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETDETACHSTATE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETGUARDSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETINHERITSCHED] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETSCHEDPARAM] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETSCHEDPOLICY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETSCOPE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETSTACKADDR] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GETSTACKSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETDETACHSTATE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETGUARDSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETINHERITSCHED] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETSCHEDPARAM] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETSCHEDPOLICY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETSCOPE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETSTACKADDR] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_SETSTACKSIZE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CANCEL] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CLEANUP_POP] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CLEANUP_PUSH] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_COND_BROADCAST] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_COND_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_COND_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_COND_SIGNAL] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_COND_TIMEDWAIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_COND_WAIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_DETACH] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_EQUAL] = {PJT_DUAL_ENTRY(stub_true)}, + [PJT_EXIT] = {PJT_DUAL_ENTRY(stub_exit)}, + [PJT_GETSPECIFIC] = {PJT_DUAL_ENTRY(stub_null)}, + [PJT_JOIN] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_KEY_CREATE] = {PJT_DUAL_ENTRY(stub_fail)}, + [PJT_KEY_DELETE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_KILL] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MAIN_NP] = {PJT_DUAL_ENTRY(stub_main)}, + [PJT_MUTEXATTR_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEXATTR_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEXATTR_SETTYPE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEX_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEX_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEX_LOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEX_TRYLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEX_UNLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ONCE] = {PJT_DUAL_ENTRY(stub_fail)}, + [PJT_RWLOCK_DESTROY] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_RWLOCK_INIT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_RWLOCK_RDLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_RWLOCK_TRYRDLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_RWLOCK_TRYWRLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_RWLOCK_UNLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_RWLOCK_WRLOCK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_SELF] = {PJT_DUAL_ENTRY(stub_self)}, + [PJT_SETCANCELSTATE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_SETCANCELTYPE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_SETSPECIFIC] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_SIGMASK] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_TESTCANCEL] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CLEANUP_POP_IMP] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CLEANUP_PUSH_IMP] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CANCEL_ENTER] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_CANCEL_LEAVE] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEX_CONSISTENT] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEXATTR_GETROBUST] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_MUTEXATTR_SETROBUST] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_GETTHREADID_NP] = {PJT_DUAL_ENTRY(stub_zero)}, + [PJT_ATTR_GET_NP] = {PJT_DUAL_ENTRY(stub_esrch)}, + [PJT_GETNAME_NP] = {PJT_DUAL_ENTRY(stub_getname_np)}, + [PJT_SUSPEND_ALL_NP] = {PJT_DUAL_ENTRY(stub_void)}, + [PJT_RESUME_ALL_NP] = {PJT_DUAL_ENTRY(stub_void)}, +}; + +/* + * Weak aliases for exported (pthread_*) and internal (_pthread_*) routines. + */ +#define WEAK_REF(sym, alias) __weak_reference(sym, alias) + +#define FUNC_TYPE(name) __CONCAT(name, _func_t) +#define FUNC_INT(name) __CONCAT(name, _int) +#define FUNC_EXP(name) __CONCAT(name, _exp) + +#define STUB_FUNC(name, idx, ret) \ + static ret FUNC_EXP(name)(void) __used; \ + static ret FUNC_INT(name)(void) __used; \ + WEAK_REF(FUNC_EXP(name), name); \ + WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ + typedef ret (*FUNC_TYPE(name))(void); \ + static ret FUNC_EXP(name)(void) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ + return (func()); \ + } \ + static ret FUNC_INT(name)(void) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ + return (func()); \ + } + +#define STUB_FUNC1(name, idx, ret, p0_type) \ + static ret FUNC_EXP(name)(p0_type) __used; \ + static ret FUNC_INT(name)(p0_type) __used; \ + WEAK_REF(FUNC_EXP(name), name); \ + WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ + typedef ret (*FUNC_TYPE(name))(p0_type); \ + static ret FUNC_EXP(name)(p0_type p0) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ + return (func(p0)); \ + } \ + static ret FUNC_INT(name)(p0_type p0) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ + return (func(p0)); \ + } + +#define STUB_FUNC2(name, idx, ret, p0_type, p1_type) \ + static ret FUNC_EXP(name)(p0_type, p1_type) __used; \ + static ret FUNC_INT(name)(p0_type, p1_type) __used; \ + WEAK_REF(FUNC_EXP(name), name); \ + WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ + typedef ret (*FUNC_TYPE(name))(p0_type, p1_type); \ + static ret FUNC_EXP(name)(p0_type p0, p1_type p1) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ + return (func(p0, p1)); \ + } \ + static ret FUNC_INT(name)(p0_type p0, p1_type p1) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ + return (func(p0, p1)); \ + } + +#define STUB_FUNC3(name, idx, ret, p0_type, p1_type, p2_type) \ + static ret FUNC_EXP(name)(p0_type, p1_type, p2_type) __used; \ + static ret FUNC_INT(name)(p0_type, p1_type, p2_type) __used; \ + WEAK_REF(FUNC_EXP(name), name); \ + WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \ + typedef ret (*FUNC_TYPE(name))(p0_type, p1_type, p2_type); \ + static ret FUNC_EXP(name)(p0_type p0, p1_type p1, p2_type p2) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \ + return (func(p0, p1, p2)); \ + } \ + static ret FUNC_INT(name)(p0_type p0, p1_type p1, p2_type p2) \ + { \ + FUNC_TYPE(name) func; \ + func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \ + return (func(p0, p1, p2)); \ + } + +STUB_FUNC1(pthread_cond_broadcast, PJT_COND_BROADCAST, int, void *) +STUB_FUNC1(pthread_cond_destroy, PJT_COND_DESTROY, int, void *) +STUB_FUNC2(pthread_cond_init, PJT_COND_INIT, int, void *, void *) +STUB_FUNC1(pthread_cond_signal, PJT_COND_SIGNAL, int, void *) +STUB_FUNC2(pthread_cond_wait, PJT_COND_WAIT, int, void *, void *) +STUB_FUNC1(pthread_getspecific, PJT_GETSPECIFIC, void *, pthread_key_t) +STUB_FUNC2(pthread_key_create, PJT_KEY_CREATE, int, void *, void *) +STUB_FUNC1(pthread_key_delete, PJT_KEY_DELETE, int, pthread_key_t) +STUB_FUNC(pthread_main_np, PJT_MAIN_NP, int) +STUB_FUNC1(pthread_mutex_destroy, PJT_MUTEX_DESTROY, int, void *) +STUB_FUNC2(pthread_mutex_init, PJT_MUTEX_INIT, int, void *, void *) +STUB_FUNC1(pthread_mutex_lock, PJT_MUTEX_LOCK, int, void *) +STUB_FUNC1(pthread_mutex_trylock, PJT_MUTEX_TRYLOCK, int, void *) +STUB_FUNC1(pthread_mutex_unlock, PJT_MUTEX_UNLOCK, int, void *) +STUB_FUNC1(pthread_mutex_consistent, PJT_MUTEX_CONSISTENT, int, void *) +STUB_FUNC1(pthread_mutexattr_destroy, PJT_MUTEXATTR_DESTROY, int, void *) +STUB_FUNC1(pthread_mutexattr_init, PJT_MUTEXATTR_INIT, int, void *) +STUB_FUNC2(pthread_mutexattr_settype, PJT_MUTEXATTR_SETTYPE, int, void *, int) +STUB_FUNC2(pthread_mutexattr_getrobust, PJT_MUTEXATTR_GETROBUST, int, void *, + int *) +STUB_FUNC2(pthread_mutexattr_setrobust, PJT_MUTEXATTR_SETROBUST, int, void *, + int) +STUB_FUNC2(pthread_once, PJT_ONCE, int, void *, void *) +STUB_FUNC1(pthread_rwlock_destroy, PJT_RWLOCK_DESTROY, int, void *) +STUB_FUNC2(pthread_rwlock_init, PJT_RWLOCK_INIT, int, void *, void *) +STUB_FUNC1(pthread_rwlock_rdlock, PJT_RWLOCK_RDLOCK, int, void *) +STUB_FUNC1(pthread_rwlock_tryrdlock, PJT_RWLOCK_TRYRDLOCK, int, void *) +STUB_FUNC1(pthread_rwlock_trywrlock, PJT_RWLOCK_TRYWRLOCK, int, void *) +STUB_FUNC1(pthread_rwlock_unlock, PJT_RWLOCK_UNLOCK, int, void *) +STUB_FUNC1(pthread_rwlock_wrlock, PJT_RWLOCK_WRLOCK, int, void *) +STUB_FUNC(pthread_self, PJT_SELF, pthread_t) +STUB_FUNC(pthread_getthreadid_np, PJT_GETTHREADID_NP, int) +STUB_FUNC2(pthread_setspecific, PJT_SETSPECIFIC, int, pthread_key_t, void *) +STUB_FUNC3(pthread_sigmask, PJT_SIGMASK, int, int, void *, void *) +STUB_FUNC3(pthread_atfork, PJT_ATFORK, int, void *, void *, void*) +STUB_FUNC1(pthread_attr_destroy, PJT_ATTR_DESTROY, int, void *); +STUB_FUNC2(pthread_attr_getdetachstate, PJT_ATTR_GETDETACHSTATE, int, void *, void *) +STUB_FUNC2(pthread_attr_getguardsize, PJT_ATTR_GETGUARDSIZE, int, void *, void *) +STUB_FUNC2(pthread_attr_getstackaddr, PJT_ATTR_GETSTACKADDR, int, void *, void *) +STUB_FUNC2(pthread_attr_getstacksize, PJT_ATTR_GETSTACKSIZE, int, void *, void *) +STUB_FUNC2(pthread_attr_getinheritsched, PJT_ATTR_GETINHERITSCHED, int, void *, void *) +STUB_FUNC2(pthread_attr_getschedparam, PJT_ATTR_GETSCHEDPARAM, int, void *, void *) +STUB_FUNC2(pthread_attr_getschedpolicy, PJT_ATTR_GETSCHEDPOLICY, int, void *, void *) +STUB_FUNC2(pthread_attr_getscope, PJT_ATTR_GETSCOPE, int, void *, void *) +STUB_FUNC1(pthread_attr_init, PJT_ATTR_INIT, int, void *) +STUB_FUNC2(pthread_attr_setdetachstate, PJT_ATTR_SETDETACHSTATE, int, void *, int) +STUB_FUNC2(pthread_attr_setguardsize, PJT_ATTR_SETGUARDSIZE, int, void *, size_t) +STUB_FUNC2(pthread_attr_setstackaddr, PJT_ATTR_SETSTACKADDR, int, void *, void *) +STUB_FUNC2(pthread_attr_setstacksize, PJT_ATTR_SETSTACKSIZE, int, void *, size_t) +STUB_FUNC2(pthread_attr_setinheritsched, PJT_ATTR_SETINHERITSCHED, int, void *, int) +STUB_FUNC2(pthread_attr_setschedparam, PJT_ATTR_SETSCHEDPARAM, int, void *, void *) +STUB_FUNC2(pthread_attr_setschedpolicy, PJT_ATTR_SETSCHEDPOLICY, int, void *, int) +STUB_FUNC2(pthread_attr_setscope, PJT_ATTR_SETSCOPE, int, void *, int) +STUB_FUNC1(pthread_cancel, PJT_CANCEL, int, void *) +STUB_FUNC1(pthread_cleanup_pop, PJT_CLEANUP_POP, int, int) +STUB_FUNC2(pthread_cleanup_push, PJT_CLEANUP_PUSH, void, void *, void *) +STUB_FUNC3(pthread_cond_timedwait, PJT_COND_TIMEDWAIT, int, void *, void *, void *) +STUB_FUNC1(pthread_detach, PJT_DETACH, int, void *) +STUB_FUNC2(pthread_equal, PJT_EQUAL, int, void *, void *) +STUB_FUNC1(pthread_exit, PJT_EXIT, void, void *) +STUB_FUNC2(pthread_join, PJT_JOIN, int, void *, void *) +STUB_FUNC2(pthread_kill, PJT_KILL, int, void *, int) +STUB_FUNC2(pthread_setcancelstate, PJT_SETCANCELSTATE, int, int, void *) +STUB_FUNC2(pthread_setcanceltype, PJT_SETCANCELTYPE, int, int, void *) +STUB_FUNC(pthread_testcancel, PJT_TESTCANCEL, void) +STUB_FUNC1(__pthread_cleanup_pop_imp, PJT_CLEANUP_POP_IMP, void, int) +STUB_FUNC3(__pthread_cleanup_push_imp, PJT_CLEANUP_PUSH_IMP, void, void *, + void *, void *) +STUB_FUNC1(_pthread_cancel_enter, PJT_CANCEL_ENTER, void, int) +STUB_FUNC1(_pthread_cancel_leave, PJT_CANCEL_LEAVE, void, int) +STUB_FUNC2(pthread_attr_get_np, PJT_ATTR_GET_NP, int, pthread_t, pthread_attr_t *) +STUB_FUNC3(pthread_getname_np, PJT_GETNAME_NP, int, pthread_t, char *, size_t) +STUB_FUNC(pthread_suspend_all_np, PJT_SUSPEND_ALL_NP, void); +STUB_FUNC(pthread_resume_all_np, PJT_RESUME_ALL_NP, void); + +static int +stub_zero(void) +{ + return (0); +} + +static void +stub_void(void) +{ + +} + +static void * +stub_null(void) +{ + return (NULL); +} + +static struct pthread * +stub_self(void) +{ + return (&main_thread); +} + +static int +stub_fail(void) +{ + return (ENOSYS); +} + +static int +stub_main(void) +{ + return (-1); +} + +static int +stub_true(void) +{ + return (1); +} + +static void +stub_exit(void) +{ + exit(0); +} + +static int +stub_esrch(void) +{ + return (ESRCH); +} + +static int +stub_getname_np(pthread_t thread, char *buf, size_t len) +{ + if (thread != &main_thread) + return (ESRCH); + if (len >= 1) + buf[0] = '\0'; + return (0); +} |