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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 <bits/stackinfo.h> #include <jmpbuf-unwind.h> 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) { #ifdef _STACK_GROWS_DOWN if ((char *) c <= currentframe) { c = NULL; break; } #elif defined _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); } |