/* Exception handling and frame unwind runtime interface routines. -*- C -*-
- Copyright (C) 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2003, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
- In addition to the permissions in the GNU General Public License, the
- Free Software Foundation gives you unlimited permission to link the
- compiled version of this file into combinations with other programs,
- and to distribute those combinations without any restriction coming
- from the use of this file. (The General Public License restrictions
- do apply in other respects; for example, they cover modification of
- the file, and distribution when not linked into a combined
- executable.)
-
GCC 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 General Public
License for more details.
- You should have received a copy of the GNU General Public License
- along with GCC; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
+
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
/* This is derived from the C++ ABI for IA-64. Where we diverge
for cross-architecture compatibility are noted with "@@@".
- This file is included from unwind-dw2.c or unwind-ia64.c. */
+ This file is included from unwind-dw2.c, unwind-sjlj.c or
+ unwind-ia64.c. */
/* Subroutine of _Unwind_RaiseException also invoked from _Unwind_Resume.
}
/* Don't let us unwind past the handler context. */
- if (match_handler)
- abort ();
+ gcc_assert (!match_handler);
uw_update_context (context, &fs);
}
/* Raise an exception, passing along the given exception object. */
-_Unwind_Reason_Code
+_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_RaiseException(struct _Unwind_Exception *exc)
{
struct _Unwind_Context this_context, cur_context;
return _URC_END_OF_STACK;
if (code != _URC_NO_REASON)
- /* Some error encountered. Ususally the unwinder doesn't
+ /* Some error encountered. Usually the unwinder doesn't
diagnose these and merely crashes. */
return _URC_FATAL_PHASE1_ERROR;
/* Subroutine of _Unwind_ForcedUnwind also invoked from _Unwind_Resume. */
static _Unwind_Reason_Code
-_Unwind_ForcedUnwind_Phase2(struct _Unwind_Exception *exc,
- struct _Unwind_Context *context)
+_Unwind_ForcedUnwind_Phase2 (struct _Unwind_Exception *exc,
+ struct _Unwind_Context *context)
{
_Unwind_Stop_Fn stop = (_Unwind_Stop_Fn) (_Unwind_Ptr) exc->private_1;
void *stop_argument = (void *) (_Unwind_Ptr) exc->private_2;
return _URC_FATAL_PHASE2_ERROR;
}
- /* Update cur_context to describe the same frame as fs. */
- uw_update_context (context, &fs);
+ /* Update cur_context to describe the same frame as fs, and discard
+ the previous context if necessary. */
+ uw_advance_context (context, &fs);
}
return code;
/* Raise an exception for forced unwinding. */
-_Unwind_Reason_Code
+_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_ForcedUnwind (struct _Unwind_Exception *exc,
_Unwind_Stop_Fn stop, void * stop_argument)
{
/* Resume propagation of an existing exception. This is used after
e.g. executing cleanup code, and not to implement rethrowing. */
-void
+void LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Resume (struct _Unwind_Exception *exc)
{
struct _Unwind_Context this_context, cur_context;
else
code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context);
- if (code != _URC_INSTALL_CONTEXT)
- abort ();
+ gcc_assert (code == _URC_INSTALL_CONTEXT);
uw_install_context (&this_context, &cur_context);
}
/* Resume propagation of an FORCE_UNWIND exception, or to rethrow
a normal exception that was handled. */
-_Unwind_Reason_Code
+_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exc)
{
struct _Unwind_Context this_context, cur_context;
code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context);
- if (code != _URC_INSTALL_CONTEXT)
- abort ();
+ gcc_assert (code == _URC_INSTALL_CONTEXT);
uw_install_context (&this_context, &cur_context);
}
/* Perform stack backtrace through unwind data. */
-_Unwind_Reason_Code
+_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument)
{
struct _Unwind_Context context;
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