f4213b9006
for them, two functions _pthread_cancel_enter and _pthread_cancel_leave are added to let thread enter and leave a cancellation point, it also makes it possible that other functions can be cancellation points in libraries without having to be rewritten in libthr.
312 lines
13 KiB
C
312 lines
13 KiB
C
/*
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* Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <signal.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include "libc_private.h"
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/*
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* Weak symbols: All libc internal usage of these functions should
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* use the weak symbol versions (_pthread_XXX). If libpthread is
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* linked, it will override these functions with (non-weak) routines.
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* The _pthread_XXX functions are provided solely for internal libc
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* usage to avoid unwanted cancellation points and to differentiate
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* between application locks and libc locks (threads holding the
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* latter can't be allowed to exit/terminate).
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*/
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/* Define a null pthread structure just to satisfy _pthread_self. */
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struct pthread {
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};
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static struct pthread main_thread;
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static int stub_main(void);
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static void *stub_null(void);
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static struct pthread *stub_self(void);
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static int stub_zero(void);
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static int stub_true(void);
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static void stub_exit(void);
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#define PJT_DUAL_ENTRY(entry) \
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(pthread_func_t)entry, (pthread_func_t)entry
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pthread_func_entry_t __thr_jtable[PJT_MAX] = {
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATFORK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_DESTROY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETDETACHSTATE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETGUARDSIZE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETINHERITSCHED */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSCHEDPARAM */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSCHEDPOLICY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSCOPE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSTACKADDR */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_GETSTACKSIZE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_INIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETDETACHSTATE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETGUARDSIZE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETINHERITSCHED */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSCHEDPARAM */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSCHEDPOLICY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSCOPE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSTACKADDR */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ATTR_SETSTACKSIZE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CANCEL */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CLEANUP_POP */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CLEANUP_PUSH */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_BROADCAST */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_DESTROY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_INIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_SIGNAL */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_TIMEDWAIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_COND_WAIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_DETACH */
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{PJT_DUAL_ENTRY(stub_true)}, /* PJT_EQUAL */
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{PJT_DUAL_ENTRY(stub_exit)}, /* PJT_EXIT */
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{PJT_DUAL_ENTRY(stub_null)}, /* PJT_GETSPECIFIC */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_JOIN */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_KEY_CREATE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_KEY_DELETE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_KILL */
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{PJT_DUAL_ENTRY(stub_main)}, /* PJT_MAIN_NP */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEXATTR_DESTROY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEXATTR_INIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEXATTR_SETTYPE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_DESTROY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_INIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_LOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_TRYLOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_MUTEX_UNLOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_ONCE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_DESTROY */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_INIT */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_RDLOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_TRYRDLOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_TRYWRLOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_UNLOCK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_RWLOCK_WRLOCK */
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{PJT_DUAL_ENTRY(stub_self)}, /* PJT_SELF */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SETCANCELSTATE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SETCANCELTYPE */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SETSPECIFIC */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_SIGMASK */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_TESTCANCEL */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CLEANUP_POP_IMP */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CLEANUP_PUSH_IMP */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CANCEL_ENTER */
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{PJT_DUAL_ENTRY(stub_zero)}, /* PJT_CANCEL_LEAVE */
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};
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/*
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* Weak aliases for exported (pthread_*) and internal (_pthread_*) routines.
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*/
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#define WEAK_REF(sym, alias) __weak_reference(sym, alias)
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#define FUNC_TYPE(name) __CONCAT(name, _func_t)
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#define FUNC_INT(name) __CONCAT(name, _int)
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#define FUNC_EXP(name) __CONCAT(name, _exp)
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#define STUB_FUNC(name, idx, ret) \
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static ret FUNC_EXP(name)(void) __used; \
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static ret FUNC_INT(name)(void) __used; \
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WEAK_REF(FUNC_EXP(name), name); \
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WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \
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typedef ret (*FUNC_TYPE(name))(void); \
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static ret FUNC_EXP(name)(void) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \
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return (func()); \
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} \
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static ret FUNC_INT(name)(void) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \
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return (func()); \
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}
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#define STUB_FUNC1(name, idx, ret, p0_type) \
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static ret FUNC_EXP(name)(p0_type) __used; \
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static ret FUNC_INT(name)(p0_type) __used; \
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WEAK_REF(FUNC_EXP(name), name); \
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WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \
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typedef ret (*FUNC_TYPE(name))(p0_type); \
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static ret FUNC_EXP(name)(p0_type p0) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \
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return (func(p0)); \
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} \
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static ret FUNC_INT(name)(p0_type p0) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \
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return (func(p0)); \
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}
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#define STUB_FUNC2(name, idx, ret, p0_type, p1_type) \
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static ret FUNC_EXP(name)(p0_type, p1_type) __used; \
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static ret FUNC_INT(name)(p0_type, p1_type) __used; \
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WEAK_REF(FUNC_EXP(name), name); \
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WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \
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typedef ret (*FUNC_TYPE(name))(p0_type, p1_type); \
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static ret FUNC_EXP(name)(p0_type p0, p1_type p1) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \
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return (func(p0, p1)); \
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} \
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static ret FUNC_INT(name)(p0_type p0, p1_type p1) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \
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return (func(p0, p1)); \
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}
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#define STUB_FUNC3(name, idx, ret, p0_type, p1_type, p2_type) \
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static ret FUNC_EXP(name)(p0_type, p1_type, p2_type) __used; \
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static ret FUNC_INT(name)(p0_type, p1_type, p2_type) __used; \
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WEAK_REF(FUNC_EXP(name), name); \
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WEAK_REF(FUNC_INT(name), __CONCAT(_, name)); \
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typedef ret (*FUNC_TYPE(name))(p0_type, p1_type, p2_type); \
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static ret FUNC_EXP(name)(p0_type p0, p1_type p1, p2_type p2) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][0]; \
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return (func(p0, p1, p2)); \
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} \
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static ret FUNC_INT(name)(p0_type p0, p1_type p1, p2_type p2) \
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{ \
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FUNC_TYPE(name) func; \
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func = (FUNC_TYPE(name))__thr_jtable[idx][1]; \
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return (func(p0, p1, p2)); \
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}
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STUB_FUNC1(pthread_cond_broadcast, PJT_COND_BROADCAST, int, void *)
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STUB_FUNC1(pthread_cond_destroy, PJT_COND_DESTROY, int, void *)
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STUB_FUNC2(pthread_cond_init, PJT_COND_INIT, int, void *, void *)
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STUB_FUNC1(pthread_cond_signal, PJT_COND_SIGNAL, int, void *)
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STUB_FUNC2(pthread_cond_wait, PJT_COND_WAIT, int, void *, void *)
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STUB_FUNC1(pthread_getspecific, PJT_GETSPECIFIC, void *, pthread_key_t)
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STUB_FUNC2(pthread_key_create, PJT_KEY_CREATE, int, void *, void *)
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STUB_FUNC1(pthread_key_delete, PJT_KEY_DELETE, int, pthread_key_t)
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STUB_FUNC(pthread_main_np, PJT_MAIN_NP, int)
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STUB_FUNC1(pthread_mutex_destroy, PJT_MUTEX_DESTROY, int, void *)
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STUB_FUNC2(pthread_mutex_init, PJT_MUTEX_INIT, int, void *, void *)
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STUB_FUNC1(pthread_mutex_lock, PJT_MUTEX_LOCK, int, void *)
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STUB_FUNC1(pthread_mutex_trylock, PJT_MUTEX_TRYLOCK, int, void *)
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STUB_FUNC1(pthread_mutex_unlock, PJT_MUTEX_UNLOCK, int, void *)
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STUB_FUNC1(pthread_mutexattr_destroy, PJT_MUTEXATTR_DESTROY, int, void *)
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STUB_FUNC1(pthread_mutexattr_init, PJT_MUTEXATTR_INIT, int, void *)
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STUB_FUNC2(pthread_mutexattr_settype, PJT_MUTEXATTR_SETTYPE, int, void *, int)
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STUB_FUNC2(pthread_once, PJT_ONCE, int, void *, void *)
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STUB_FUNC1(pthread_rwlock_destroy, PJT_RWLOCK_DESTROY, int, void *)
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STUB_FUNC2(pthread_rwlock_init, PJT_RWLOCK_INIT, int, void *, void *)
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STUB_FUNC1(pthread_rwlock_rdlock, PJT_RWLOCK_RDLOCK, int, void *)
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STUB_FUNC1(pthread_rwlock_tryrdlock, PJT_RWLOCK_TRYRDLOCK, int, void *)
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STUB_FUNC1(pthread_rwlock_trywrlock, PJT_RWLOCK_TRYWRLOCK, int, void *)
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STUB_FUNC1(pthread_rwlock_unlock, PJT_RWLOCK_UNLOCK, int, void *)
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STUB_FUNC1(pthread_rwlock_wrlock, PJT_RWLOCK_WRLOCK, int, void *)
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STUB_FUNC(pthread_self, PJT_SELF, pthread_t)
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STUB_FUNC2(pthread_setspecific, PJT_SETSPECIFIC, int, pthread_key_t, void *)
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STUB_FUNC3(pthread_sigmask, PJT_SIGMASK, int, int, void *, void *)
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STUB_FUNC3(pthread_atfork, PJT_ATFORK, int, void *, void *, void*)
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STUB_FUNC1(pthread_attr_destroy, PJT_ATTR_DESTROY, int, void *);
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STUB_FUNC2(pthread_attr_getdetachstate, PJT_ATTR_GETDETACHSTATE, int, void *, void *)
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STUB_FUNC2(pthread_attr_getguardsize, PJT_ATTR_GETGUARDSIZE, int, void *, void *)
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STUB_FUNC2(pthread_attr_getstackaddr, PJT_ATTR_GETSTACKADDR, int, void *, void *)
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STUB_FUNC2(pthread_attr_getstacksize, PJT_ATTR_GETSTACKSIZE, int, void *, void *)
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STUB_FUNC2(pthread_attr_getinheritsched, PJT_ATTR_GETINHERITSCHED, int, void *, void *)
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STUB_FUNC2(pthread_attr_getschedparam, PJT_ATTR_GETSCHEDPARAM, int, void *, void *)
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STUB_FUNC2(pthread_attr_getschedpolicy, PJT_ATTR_GETSCHEDPOLICY, int, void *, void *)
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STUB_FUNC2(pthread_attr_getscope, PJT_ATTR_GETSCOPE, int, void *, void *)
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STUB_FUNC1(pthread_attr_init, PJT_ATTR_INIT, int, void *)
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STUB_FUNC2(pthread_attr_setdetachstate, PJT_ATTR_SETDETACHSTATE, int, void *, int)
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STUB_FUNC2(pthread_attr_setguardsize, PJT_ATTR_SETGUARDSIZE, int, void *, size_t)
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STUB_FUNC2(pthread_attr_setstackaddr, PJT_ATTR_SETSTACKADDR, int, void *, void *)
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STUB_FUNC2(pthread_attr_setstacksize, PJT_ATTR_SETSTACKSIZE, int, void *, size_t)
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STUB_FUNC2(pthread_attr_setinheritsched, PJT_ATTR_SETINHERITSCHED, int, void *, int)
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STUB_FUNC2(pthread_attr_setschedparam, PJT_ATTR_SETSCHEDPARAM, int, void *, void *)
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STUB_FUNC2(pthread_attr_setschedpolicy, PJT_ATTR_SETSCHEDPOLICY, int, void *, int)
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STUB_FUNC2(pthread_attr_setscope, PJT_ATTR_SETSCOPE, int, void *, int)
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STUB_FUNC1(pthread_cancel, PJT_CANCEL, int, void *)
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STUB_FUNC1(pthread_cleanup_pop, PJT_CLEANUP_POP, int, int)
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STUB_FUNC2(pthread_cleanup_push, PJT_CLEANUP_PUSH, void, void *, void *)
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STUB_FUNC3(pthread_cond_timedwait, PJT_COND_TIMEDWAIT, int, void *, void *, void *)
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STUB_FUNC1(pthread_detach, PJT_DETACH, int, void *)
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STUB_FUNC2(pthread_equal, PJT_EQUAL, int, void *, void *)
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STUB_FUNC1(pthread_exit, PJT_EXIT, void, void *)
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STUB_FUNC2(pthread_join, PJT_JOIN, int, void *, void *)
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STUB_FUNC2(pthread_kill, PJT_KILL, int, void *, int)
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STUB_FUNC2(pthread_setcancelstate, PJT_SETCANCELSTATE, int, int, void *)
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STUB_FUNC2(pthread_setcanceltype, PJT_SETCANCELTYPE, int, int, void *)
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STUB_FUNC(pthread_testcancel, PJT_TESTCANCEL, void)
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STUB_FUNC1(__pthread_cleanup_pop_imp, PJT_CLEANUP_POP_IMP, int, int)
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STUB_FUNC2(__pthread_cleanup_push_imp, PJT_CLEANUP_PUSH_IMP, void, void*, void *);
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STUB_FUNC1(_pthread_cancel_enter, PJT_CANCEL_ENTER, int, int)
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STUB_FUNC1(_pthread_cancel_leave, PJT_CANCEL_LEAVE, int, int)
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static int
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stub_zero(void)
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{
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return (0);
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}
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static void *
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stub_null(void)
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{
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return (NULL);
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}
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static struct pthread *
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stub_self(void)
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{
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return (&main_thread);
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}
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static int
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stub_main(void)
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{
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return (-1);
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}
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static int
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stub_true(void)
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{
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return (1);
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}
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static void
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stub_exit(void)
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{
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exit(0);
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}
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