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>
22 #include <jmpbuf-unwind.h>
24 static void pthread_cleanup_upto(__jmp_buf target
)
26 pthread_descr self
= thread_self();
27 struct _pthread_cleanup_buffer
* c
;
28 char *currentframe
= CURRENT_STACK_FRAME
;
30 for (c
= THREAD_GETMEM(self
, p_cleanup
);
31 c
!= NULL
&& _JMPBUF_UNWINDS(target
, c
);
34 #ifdef _STACK_GROWS_DOWN
35 if ((char *) c
<= currentframe
)
40 #elif defined _STACK_GROWS_UP
41 if ((char *) c
>= currentframe
)
47 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
49 c
->__routine(c
->__arg
);
51 THREAD_SETMEM(self
, p_cleanup
, c
);
52 if (THREAD_GETMEM(self
, p_in_sighandler
)
53 && _JMPBUF_UNWINDS(target
, THREAD_GETMEM(self
, p_in_sighandler
)))
54 THREAD_SETMEM(self
, p_in_sighandler
, NULL
);
57 void siglongjmp(sigjmp_buf env
, int val
)
59 pthread_cleanup_upto(env
->__jmpbuf
);
60 __libc_siglongjmp(env
, val
);
63 void longjmp(jmp_buf env
, int val
)
65 pthread_cleanup_upto(env
->__jmpbuf
);
66 __libc_longjmp(env
, val
);