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-rw-r--r--libpthread/nptl/pt-cleanup.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/libpthread/nptl/pt-cleanup.c b/libpthread/nptl/pt-cleanup.c
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+++ b/libpthread/nptl/pt-cleanup.c
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+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <setjmp.h>
+#include <stdlib.h>
+#include "pthreadP.h"
+#include "jmpbuf-unwind.h"
+
+void
+__pthread_cleanup_upto (__jmp_buf target, char *targetframe)
+{
+ struct pthread *self = THREAD_SELF;
+ struct _pthread_cleanup_buffer *cbuf;
+
+ /* Adjust all pointers used in comparisons, so that top of thread's
+ stack is at the top of address space. Without that, things break
+ if stack is allocated above the main stack. */
+ uintptr_t adj = (uintptr_t) self->stackblock + self->stackblock_size;
+ uintptr_t targetframe_adj = (uintptr_t) targetframe - adj;
+
+ for (cbuf = THREAD_GETMEM (self, cleanup);
+ cbuf != NULL && _JMPBUF_UNWINDS_ADJ (target, cbuf, adj);
+ cbuf = cbuf->__prev)
+ {
+#if _STACK_GROWS_DOWN
+ if ((uintptr_t) cbuf - adj <= targetframe_adj)
+ {
+ cbuf = NULL;
+ break;
+ }
+#elif _STACK_GROWS_UP
+ if ((uintptr_t) cbuf - adj >= targetframe_adj)
+ {
+ cbuf = NULL;
+ break;
+ }
+#else
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
+#endif
+
+ /* Call the cleanup code. */
+ cbuf->__routine (cbuf->__arg);
+ }
+
+ THREAD_SETMEM (self, cleanup, cbuf);
+}
+hidden_def (__pthread_cleanup_upto)