1 /* Linuxthreads - a simple clone()-based implementation of Posix */
2 /* threads for Linux. */
3 /* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */
5 /* This program is free software; you can redistribute it and/or */
6 /* modify it under the terms of the GNU Library General Public License */
7 /* as published by the Free Software Foundation; either version 2 */
8 /* of the License, or (at your option) any later version. */
10 /* This program is distributed in the hope that it will be useful, */
11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
13 /* GNU Library General Public License for more details. */
15 /* Redefine siglongjmp and longjmp so that they interact correctly
16 with cleanup handlers */
20 #include "internals.h"
21 #include <bits/stackinfo.h>
23 /* These functions are not declared anywhere since they shouldn't be
24 used at another place but here. */
25 extern __typeof(siglongjmp) __libc_siglongjmp attribute_noreturn;
26 extern __typeof(longjmp) __libc_longjmp attribute_noreturn;
28 static void pthread_cleanup_upto(__jmp_buf target)
30 pthread_descr self = thread_self();
31 struct _pthread_cleanup_buffer * c;
32 char *currentframe = CURRENT_STACK_FRAME;
34 for (c = THREAD_GETMEM(self, p_cleanup);
35 c != NULL && _JMPBUF_UNWINDS(target, c);
39 if ((char *) c <= currentframe)
45 if ((char *) c >= currentframe)
51 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
53 c->__routine(c->__arg);
55 THREAD_SETMEM(self, p_cleanup, c);
56 if (THREAD_GETMEM(self, p_in_sighandler)
57 && _JMPBUF_UNWINDS(target, THREAD_GETMEM(self, p_in_sighandler)))
58 THREAD_SETMEM(self, p_in_sighandler, NULL);
61 void attribute_noreturn siglongjmp(sigjmp_buf env, int val)
63 pthread_cleanup_upto(env->__jmpbuf);
64 __libc_siglongjmp(env, val);
67 void attribute_noreturn longjmp(jmp_buf env, int val)
69 pthread_cleanup_upto(env->__jmpbuf);
70 __libc_longjmp(env, val);