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