| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library 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 GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <setjmp.h> |
| 20 | #include <stdlib.h> |
| 21 | #include "pthreadP.h" |
| 22 | #include <jmpbuf-unwind.h> |
| 23 | |
| 24 | void |
| 25 | __pthread_cleanup_upto (__jmp_buf target, char *targetframe) |
| 26 | { |
| 27 | struct pthread *self = THREAD_SELF; |
| 28 | struct _pthread_cleanup_buffer *cbuf; |
| 29 | |
| 30 | /* Adjust all pointers used in comparisons, so that top of thread's |
| 31 | stack is at the top of address space. Without that, things break |
| 32 | if stack is allocated above the main stack. */ |
| 33 | uintptr_t adj = (uintptr_t) self->stackblock + self->stackblock_size; |
| 34 | uintptr_t targetframe_adj = (uintptr_t) targetframe - adj; |
| 35 | |
| 36 | for (cbuf = THREAD_GETMEM (self, cleanup); |
| 37 | cbuf != NULL && _JMPBUF_UNWINDS_ADJ (target, cbuf, adj); |
| 38 | cbuf = cbuf->__prev) |
| 39 | { |
| 40 | #if _STACK_GROWS_DOWN |
| 41 | if ((uintptr_t) cbuf - adj <= targetframe_adj) |
| 42 | { |
| 43 | cbuf = NULL; |
| 44 | break; |
| 45 | } |
| 46 | #elif _STACK_GROWS_UP |
| 47 | if ((uintptr_t) cbuf - adj >= targetframe_adj) |
| 48 | { |
| 49 | cbuf = NULL; |
| 50 | break; |
| 51 | } |
| 52 | #else |
| 53 | # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" |
| 54 | #endif |
| 55 | |
| 56 | /* Call the cleanup code. */ |
| 57 | cbuf->__routine (cbuf->__arg); |
| 58 | } |
| 59 | |
| 60 | THREAD_SETMEM (self, cleanup, cbuf); |
| 61 | } |
| 62 | hidden_def (__pthread_cleanup_upto) |