| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Linuxthreads - a simple clone()-based implementation of Posix */ |
| 2 | /* threads for Linux. */ |
| 3 | /* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */ |
| 4 | /* */ |
| 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. */ |
| 9 | /* */ |
| 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. */ |
| 14 | |
| 15 | /* Redefine siglongjmp and longjmp so that they interact correctly |
| 16 | with cleanup handlers */ |
| 17 | |
| 18 | #define NO_PTR_DEMANGLE |
| 19 | |
| 20 | #include <setjmp.h> |
| 21 | #include "pthread.h" |
| 22 | #include "internals.h" |
| 23 | #ifndef NO_PTR_DEMANGLE |
| 24 | #include <jmpbuf-unwind.h> |
| 25 | #define __JMPBUF_UNWINDS(a,b,c) _JMPBUF_UNWINDS(a,b,c) |
| 26 | #else |
| 27 | #define __JMPBUF_UNWINDS(a,b,c) _JMPBUF_UNWINDS(a,b) |
| 28 | #endif |
| 29 | |
| 30 | #ifndef NO_PTR_DEMANGLE |
| 31 | static __inline__ uintptr_t |
| 32 | demangle_ptr (uintptr_t x) |
| 33 | { |
| 34 | #ifdef PTR_DEMANGLE |
| 35 | PTR_DEMANGLE (x); |
| 36 | #endif |
| 37 | return x; |
| 38 | } |
| 39 | #else |
| 40 | #define demangle_ptr(x) x |
| 41 | #endif |
| 42 | |
| 43 | void __pthread_cleanup_upto (__jmp_buf target, char *targetframe) |
| 44 | { |
| 45 | pthread_descr self = thread_self(); |
| 46 | struct _pthread_cleanup_buffer * c; |
| 47 | |
| 48 | for (c = THREAD_GETMEM(self, p_cleanup); |
| 49 | c != NULL && __JMPBUF_UNWINDS(target, c, demangle_ptr); |
| 50 | c = c->__prev) |
| 51 | { |
| 52 | #ifdef _STACK_GROWS_DOWN |
| 53 | if ((char *) c <= targetframe) |
| 54 | { |
| 55 | c = NULL; |
| 56 | break; |
| 57 | } |
| 58 | #elif defined _STACK_GROWS_UP |
| 59 | if ((char *) c >= targetframe) |
| 60 | { |
| 61 | c = NULL; |
| 62 | break; |
| 63 | } |
| 64 | #else |
| 65 | # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" |
| 66 | #endif |
| 67 | c->__routine(c->__arg); |
| 68 | } |
| 69 | THREAD_SETMEM(self, p_cleanup, c); |
| 70 | if (THREAD_GETMEM(self, p_in_sighandler) |
| 71 | && __JMPBUF_UNWINDS(target, THREAD_GETMEM(self, p_in_sighandler), |
| 72 | demangle_ptr)) |
| 73 | THREAD_SETMEM(self, p_in_sighandler, NULL); |
| 74 | } |