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/* Linuxthreads - a simple clone()-based implementation of Posix */
/* threads for Linux. */
/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU Library General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU Library General Public License for more details. */
/* Redefine siglongjmp and longjmp so that they interact correctly
with cleanup handlers */
#include <setjmp.h>
#include "pthread.h"
#include "internals.h"
#include <stackinfo.h>
/* These functions are not declared anywhere since they shouldn't be
used at another place but here. */
extern void __libc_siglongjmp (sigjmp_buf env, int val)
__attribute__ ((noreturn));
extern void __libc_longjmp (sigjmp_buf env, int val)
__attribute__ ((noreturn));
static void pthread_cleanup_upto(__jmp_buf target)
{
pthread_descr self = thread_self();
struct _pthread_cleanup_buffer * c;
char *currentframe = CURRENT_STACK_FRAME;
for (c = THREAD_GETMEM(self, p_cleanup);
c != NULL && _JMPBUF_UNWINDS(target, c);
c = c->__prev)
{
#if _STACK_GROWS_DOWN
if ((char *) c <= currentframe)
{
c = NULL;
break;
}
#elif _STACK_GROWS_UP
if ((char *) c >= currentframe)
{
c = NULL;
break;
}
#else
# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
#endif
c->__routine(c->__arg);
}
THREAD_SETMEM(self, p_cleanup, c);
if (THREAD_GETMEM(self, p_in_sighandler)
&& _JMPBUF_UNWINDS(target, THREAD_GETMEM(self, p_in_sighandler)))
THREAD_SETMEM(self, p_in_sighandler, NULL);
}
void siglongjmp(sigjmp_buf env, int val)
{
pthread_cleanup_upto(env->__jmpbuf);
__libc_siglongjmp(env, val);
}
void longjmp(jmp_buf env, int val)
{
pthread_cleanup_upto(env->__jmpbuf);
__libc_longjmp(env, val);
}
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