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 <stackinfo.h>
23 /* These functions are not declared anywhere since they shouldn't be
24 used at another place but here. */
25 extern void __libc_siglongjmp (sigjmp_buf env
, int val
)
26 __attribute__ ((noreturn
));
27 extern void __libc_longjmp (sigjmp_buf env
, int val
)
28 __attribute__ ((noreturn
));
31 static void pthread_cleanup_upto(__jmp_buf target
)
33 pthread_descr self
= thread_self();
34 struct _pthread_cleanup_buffer
* c
;
35 char *currentframe
= CURRENT_STACK_FRAME
;
37 for (c
= THREAD_GETMEM(self
, p_cleanup
);
38 c
!= NULL
&& _JMPBUF_UNWINDS(target
, c
);
42 if ((char *) c
<= currentframe
)
48 if ((char *) c
>= currentframe
)
54 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
56 c
->__routine(c
->__arg
);
58 THREAD_SETMEM(self
, p_cleanup
, c
);
59 if (THREAD_GETMEM(self
, p_in_sighandler
)
60 && _JMPBUF_UNWINDS(target
, THREAD_GETMEM(self
, p_in_sighandler
)))
61 THREAD_SETMEM(self
, p_in_sighandler
, NULL
);
64 void siglongjmp(sigjmp_buf env
, int val
)
66 pthread_cleanup_upto(env
->__jmpbuf
);
67 __libc_siglongjmp(env
, val
);
70 void longjmp(jmp_buf env
, int val
)
72 pthread_cleanup_upto(env
->__jmpbuf
);
73 __libc_longjmp(env
, val
);