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63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* Copyright (C) 2002-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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#include <stdlib.h>
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#include "pthreadP.h"
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#include <jmpbuf-unwind.h>
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void
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__pthread_cleanup_upto (__jmp_buf target, char *targetframe)
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{
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struct pthread *self = THREAD_SELF;
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struct _pthread_cleanup_buffer *cbuf;
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/* Adjust all pointers used in comparisons, so that top of thread's
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stack is at the top of address space. Without that, things break
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if stack is allocated above the main stack. */
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uintptr_t adj = (uintptr_t) self->stackblock + self->stackblock_size;
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uintptr_t targetframe_adj = (uintptr_t) targetframe - adj;
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for (cbuf = THREAD_GETMEM (self, cleanup);
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cbuf != NULL && _JMPBUF_UNWINDS_ADJ (target, cbuf, adj);
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cbuf = cbuf->__prev)
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{
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#if _STACK_GROWS_DOWN
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if ((uintptr_t) cbuf - adj <= targetframe_adj)
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{
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cbuf = NULL;
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break;
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}
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#elif _STACK_GROWS_UP
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if ((uintptr_t) cbuf - adj >= targetframe_adj)
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{
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cbuf = NULL;
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break;
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}
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#else
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# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
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#endif
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/* Call the cleanup code. */
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cbuf->__routine (cbuf->__arg);
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}
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THREAD_SETMEM (self, cleanup, cbuf);
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}
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hidden_def (__pthread_cleanup_upto)
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