mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/* Copyright (C) 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>
|
|
and Richard Henderson <rth@redhat.com>, 2003.
|
|
|
|
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"
|
|
|
|
|
|
#ifdef HAVE_FORCED_UNWIND
|
|
|
|
static _Unwind_Reason_Code
|
|
unwind_stop (int version, _Unwind_Action actions,
|
|
_Unwind_Exception_Class exc_class,
|
|
struct _Unwind_Exception *exc_obj,
|
|
struct _Unwind_Context *context, void *stop_parameter)
|
|
{
|
|
struct pthread_unwind_buf *buf = stop_parameter;
|
|
|
|
/* Do longjmp if we're at "end of stack", aka "end of unwind data".
|
|
We assume there are only C frame without unwind data in between
|
|
here and the jmp_buf target. Otherwise simply note that the CFA
|
|
of a function is NOT within it's stack frame; it's the SP of the
|
|
previous frame. */
|
|
if ((actions & _UA_END_OF_STACK)
|
|
|| ! _JMPBUF_UNWINDS (buf->cancel_jmp_buf[0].jmp_buf,
|
|
_Unwind_GetCFA (context)))
|
|
__libc_longjmp ((struct __jmp_buf_tag *) buf->cancel_jmp_buf, 1);
|
|
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
|
|
static void
|
|
unwind_cleanup (_Unwind_Reason_Code reason, struct _Unwind_Exception *exc)
|
|
{
|
|
/* Nothing to do. */
|
|
}
|
|
|
|
#endif /* have forced unwind */
|
|
|
|
|
|
void
|
|
__cleanup_fct_attribute __attribute ((noreturn))
|
|
__pthread_unwind (__pthread_unwind_buf_t *buf)
|
|
{
|
|
struct pthread_unwind_buf *ibuf = (struct pthread_unwind_buf *) buf;
|
|
struct pthread *self = THREAD_SELF;
|
|
|
|
/* Handle the compatibility stuff first. Execute all handlers
|
|
registered with the old method. We don't execute them in order,
|
|
instead, they will run first. */
|
|
struct _pthread_cleanup_buffer *oldp = ibuf->priv.data.cleanup;
|
|
struct _pthread_cleanup_buffer *curp = THREAD_GETMEM (self, cleanup);
|
|
|
|
if (curp != oldp)
|
|
{
|
|
do
|
|
{
|
|
/* Pointer to the next element. */
|
|
struct _pthread_cleanup_buffer *nextp = curp->__prev;
|
|
|
|
/* Call the handler. */
|
|
curp->__routine (curp->__arg);
|
|
|
|
/* To the next. */
|
|
curp = nextp;
|
|
}
|
|
while (curp != oldp);
|
|
|
|
/* Mark the current element as handled. */
|
|
THREAD_SETMEM (self, cleanup, curp);
|
|
}
|
|
|
|
#ifdef HAVE_FORCED_UNWIND
|
|
/* This is not a catchable exception, so don't provide any details about
|
|
the exception type. We do need to initialize the field though. */
|
|
THREAD_SETMEM (self, exc.exception_class, 0);
|
|
THREAD_SETMEM (self, exc.exception_cleanup, unwind_cleanup);
|
|
|
|
_Unwind_ForcedUnwind (&self->exc, unwind_stop, ibuf);
|
|
#else
|
|
/* We simply jump to the registered setjmp buffer. */
|
|
__libc_longjmp ((struct __jmp_buf_tag *) ibuf->cancel_jmp_buf, 1);
|
|
#endif
|
|
/* NOTREACHED */
|
|
|
|
/* We better do not get here. */
|
|
abort ();
|
|
}
|
|
|
|
|
|
void
|
|
__cleanup_fct_attribute __attribute ((noreturn))
|
|
__pthread_unwind_next (__pthread_unwind_buf_t *buf)
|
|
{
|
|
struct pthread_unwind_buf *ibuf = (struct pthread_unwind_buf *) buf;
|
|
|
|
__pthread_unwind (ibuf->priv.data.prev);
|
|
}
|