1/* Copyright (C) 2002-2020 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 <https://www.gnu.org/licenses/>. */
18
19#include <setjmp.h>
20#include <stdlib.h>
21#include "pthreadP.h"
22#include <jmpbuf-unwind.h>
23
24void
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}
62hidden_def (__pthread_cleanup_upto)
63