diff options
Diffstat (limited to 'libpthread/linuxthreads/ptcleanup.c')
| -rw-r--r-- | libpthread/linuxthreads/ptcleanup.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/ptcleanup.c b/libpthread/linuxthreads/ptcleanup.c new file mode 100644 index 000000000..88b9453ff --- /dev/null +++ b/libpthread/linuxthreads/ptcleanup.c @@ -0,0 +1,74 @@ +/* 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 */ + +#define NO_PTR_DEMANGLE + +#include <setjmp.h> +#include "pthread.h" +#include "internals.h" +#include <jmpbuf-unwind.h> +#ifndef NO_PTR_DEMANGLE +#define __JMPBUF_UNWINDS(a,b,c) _JMPBUF_UNWINDS(a,b,c) +#else +#define __JMPBUF_UNWINDS(a,b,c) _JMPBUF_UNWINDS(a,b) +#endif + +#ifndef NO_PTR_DEMANGLE +static __inline__ uintptr_t +demangle_ptr (uintptr_t x) +{ +#ifdef PTR_DEMANGLE + PTR_DEMANGLE (x); +#endif + return x; +} +#else +#define demangle_ptr(x) x +#endif + +void __pthread_cleanup_upto (__jmp_buf target, char *targetframe) +{ + pthread_descr self = thread_self(); + struct _pthread_cleanup_buffer * c; + + for (c = THREAD_GETMEM(self, p_cleanup); + c != NULL && __JMPBUF_UNWINDS(target, c, demangle_ptr); + c = c->__prev) + { +#ifdef _STACK_GROWS_DOWN + if ((char *) c <= targetframe) + { + c = NULL; + break; + } +#elif defined _STACK_GROWS_UP + if ((char *) c >= targetframe) + { + 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), + demangle_ptr)) + THREAD_SETMEM(self, p_in_sighandler, NULL); +} |