// -*- C++ -*- The GNU C++ exception personality routine.
-// Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+// 2011
+// 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.
//
// GCC is distributed in the hope that it will be useful,
// 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, 51 Franklin Street, Fifth Floor,
-// Boston, MA 02110-1301, USA.
-
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// 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/>.
#include <bits/c++config.h>
#include <cstdlib>
-#include <exception_defines.h>
+#include <bits/exception_defines.h>
+#include <cxxabi.h>
#include "unwind-cxx.h"
-using namespace __cxxabiv1;
-#ifdef __ARM_EABI_UNWINDER__
-#define NO_SIZE_OF_ENCODED_VALUE
-#endif
+using namespace __cxxabiv1;
#include "unwind-pe.h"
parse_lsda_header (_Unwind_Context *context, const unsigned char *p,
lsda_header_info *info)
{
- _Unwind_Word tmp;
+ _uleb128_t tmp;
unsigned char lpstart_encoding;
info->Start = (context ? _Unwind_GetRegionStart (context) : 0);
info->ttype_encoding = *p++;
if (info->ttype_encoding != DW_EH_PE_omit)
{
+#if _GLIBCXX_OVERRIDE_TTYPE_ENCODING
+ /* Older ARM EABI toolchains set this value incorrectly, so use a
+ hardcoded OS-specific format. */
+ info->ttype_encoding = _GLIBCXX_OVERRIDE_TTYPE_ENCODING;
+#endif
p = read_uleb128 (p, &tmp);
info->TType = p + tmp;
}
return p;
}
-#ifdef __ARM_EABI_UNWINDER__
-
// Return an element from a type table.
-static const std::type_info*
-get_ttype_entry(lsda_header_info* info, _Unwind_Word i)
+static const std::type_info *
+get_ttype_entry (lsda_header_info *info, _uleb128_t i)
{
_Unwind_Ptr ptr;
- ptr = (_Unwind_Ptr) (info->TType - (i * 4));
- ptr = _Unwind_decode_target2(ptr);
-
+ i *= size_of_encoded_value (info->ttype_encoding);
+ read_encoded_value_with_base (info->ttype_encoding, info->ttype_base,
+ info->TType - i, &ptr);
+
return reinterpret_cast<const std::type_info *>(ptr);
}
+#ifdef __ARM_EABI_UNWINDER__
+
// The ABI provides a routine for matching exception object types.
typedef _Unwind_Control_Block _throw_typet;
#define get_adjusted_ptr(catch_type, throw_type, thrown_ptr_p) \
static bool
check_exception_spec(lsda_header_info* info, _throw_typet* throw_type,
- void* thrown_ptr, _Unwind_Sword filter_value)
+ void* thrown_ptr, _sleb128_t filter_value)
{
- const _Unwind_Word* e = ((const _Unwind_Word*) info->TType)
+ const _uleb128_t* e = ((const _uleb128_t*) info->TType)
- filter_value - 1;
while (1)
{
const std::type_info* catch_type;
- _Unwind_Word tmp;
+ _uleb128_t tmp;
tmp = *e;
if (tmp == 0)
return false;
- tmp = _Unwind_decode_target2((_Unwind_Word) e);
+ tmp = _Unwind_decode_typeinfo_ptr(info->ttype_base, (_Unwind_Word) e);
// Match a ttype entry.
catch_type = reinterpret_cast<const std::type_info*>(tmp);
const unsigned char* action_record
__attribute__((__unused__)))
{
- ue_header->barrier_cache.sp = _Unwind_GetGR(context, 13);
+ ue_header->barrier_cache.sp = _Unwind_GetGR(context, UNWIND_STACK_REG);
ue_header->barrier_cache.bitpattern[0] = (_uw) thrown_ptr;
ue_header->barrier_cache.bitpattern[1]
= (_uw) handler_switch_value;
} \
while (0)
-#else
-typedef const std::type_info _throw_typet;
-
-
-// Return an element from a type table.
+// Return true if the filter spec is empty, ie throw().
-static const std::type_info *
-get_ttype_entry (lsda_header_info *info, _Unwind_Word i)
+static bool
+empty_exception_spec (lsda_header_info *info, _Unwind_Sword filter_value)
{
- _Unwind_Ptr ptr;
-
- i *= size_of_encoded_value (info->ttype_encoding);
- read_encoded_value_with_base (info->ttype_encoding, info->ttype_base,
- info->TType - i, &ptr);
+ const _Unwind_Word* e = ((const _Unwind_Word*) info->TType)
+ - filter_value - 1;
- return reinterpret_cast<const std::type_info *>(ptr);
+ return *e == 0;
}
+#else
+typedef const std::type_info _throw_typet;
+
+
// Given the thrown type THROW_TYPE, pointer to a variable containing a
// pointer to the exception object THROWN_PTR_P and a type CATCH_TYPE to
// compare against, return whether or not there is a match and if so,
static bool
check_exception_spec(lsda_header_info* info, _throw_typet* throw_type,
- void* thrown_ptr, _Unwind_Sword filter_value)
+ void* thrown_ptr, _sleb128_t filter_value)
{
const unsigned char *e = info->TType - filter_value - 1;
while (1)
{
const std::type_info *catch_type;
- _Unwind_Word tmp;
+ _uleb128_t tmp;
e = read_uleb128 (e, &tmp);
#define CONTINUE_UNWINDING return _URC_CONTINUE_UNWIND
-#endif // !__ARM_EABI_UNWINDER__
-
// Return true if the filter spec is empty, ie throw().
static bool
empty_exception_spec (lsda_header_info *info, _Unwind_Sword filter_value)
{
const unsigned char *e = info->TType - filter_value - 1;
- _Unwind_Word tmp;
+ _uleb128_t tmp;
e = read_uleb128 (e, &tmp);
return tmp == 0;
}
+#endif // !__ARM_EABI_UNWINDER__
+
namespace __cxxabiv1
{
const unsigned char *p;
_Unwind_Ptr landing_pad, ip;
int handler_switch_value;
- void* thrown_ptr = ue_header + 1;
+ void* thrown_ptr = 0;
bool foreign_exception;
int ip_before_insn = 0;
case _US_UNWIND_FRAME_STARTING:
actions = _UA_CLEANUP_PHASE;
if (!(state & _US_FORCE_UNWIND)
- && ue_header->barrier_cache.sp == _Unwind_GetGR(context, 13))
+ && ue_header->barrier_cache.sp == _Unwind_GetGR(context,
+ UNWIND_STACK_REG))
actions |= _UA_HANDLER_FRAME;
break;
// The dwarf unwinder assumes the context structure holds things like the
// function and LSDA pointers. The ARM implementation caches these in
- // the exception header (UCB). To avoid rewriting everything we make the
- // virtual IP register point at the UCB.
+ // the exception header (UCB). To avoid rewriting everything we make a
+ // virtual scratch register point at the UCB.
ip = (_Unwind_Ptr) ue_header;
- _Unwind_SetGR(context, 12, ip);
+ _Unwind_SetGR(context, UNWIND_POINTER_REG, ip);
#else
__cxa_exception* xh = __get_exception_header_from_ue(ue_header);
// Parse the LSDA header.
p = parse_lsda_header (context, language_specific_data, &info);
info.ttype_base = base_of_encoded_value (info.ttype_encoding, context);
-#ifdef HAVE_GETIPINFO
+#ifdef _GLIBCXX_HAVE_GETIPINFO
ip = _Unwind_GetIPInfo (context, &ip_before_insn);
#else
ip = _Unwind_GetIP (context);
}
else
{
- _Unwind_Word cs_lp, cs_action;
+ _uleb128_t cs_lp, cs_action;
do
{
p = read_uleb128 (p, &cs_lp);
while (p < info.action_table)
{
_Unwind_Ptr cs_start, cs_len, cs_lp;
- _Unwind_Word cs_action;
+ _uleb128_t cs_action;
// Note that all call-site encodings are "absolute" displacements.
p = read_encoded_value (0, info.call_site_encoding, p, &cs_start);
{
// Otherwise we have a catch handler or exception specification.
- _Unwind_Sword ar_filter, ar_disp;
+ _sleb128_t ar_filter, ar_disp;
const std::type_info* catch_type;
_throw_typet* throw_type;
bool saw_cleanup = false;
bool saw_handler = false;
- // During forced unwinding, we only run cleanups. With a foreign
- // exception class, there's no exception type.
- // ??? What to do about GNU Java and GNU Ada exceptions.
-
- if ((actions & _UA_FORCE_UNWIND)
- || foreign_exception)
- throw_type = 0;
- else
#ifdef __ARM_EABI_UNWINDER__
- throw_type = ue_header;
+ // ??? How does this work - more importantly, how does it interact with
+ // dependent exceptions?
+ throw_type = ue_header;
+ if (actions & _UA_FORCE_UNWIND)
+ {
+ __GXX_INIT_FORCED_UNWIND_CLASS(ue_header->exception_class);
+ }
+ else if (!foreign_exception)
+ thrown_ptr = __get_object_from_ue (ue_header);
#else
- throw_type = xh->exceptionType;
+#ifdef __GXX_RTTI
+ // During forced unwinding, match a magic exception type.
+ if (actions & _UA_FORCE_UNWIND)
+ {
+ throw_type = &typeid(abi::__forced_unwind);
+ }
+ // With a foreign exception class, there's no exception type.
+ // ??? What to do about GNU Java and GNU Ada exceptions?
+ else if (foreign_exception)
+ {
+ throw_type = &typeid(abi::__foreign_exception);
+ }
+ else
+#endif
+ {
+ thrown_ptr = __get_object_from_ue (ue_header);
+ throw_type = __get_exception_header_from_obj
+ (thrown_ptr)->exceptionType;
+ }
#endif
while (1)
// object to stuff bits in for __cxa_call_unexpected to use.
// Allow them iff the exception spec is non-empty. I.e.
// a throw() specification results in __unexpected.
- if (throw_type
+ if ((throw_type
+ && !(actions & _UA_FORCE_UNWIND)
+ && !foreign_exception)
? ! check_exception_spec (&info, throw_type, thrown_ptr,
ar_filter)
: empty_exception_spec (&info, ar_filter))
std::terminate ();
else if (handler_switch_value < 0)
{
- try
+ __try
{ std::unexpected (); }
- catch(...)
+ __catch(...)
{ std::terminate (); }
}
}
if (handler_switch_value < 0)
{
parse_lsda_header (context, language_specific_data, &info);
+ info.ttype_base = base_of_encoded_value (info.ttype_encoding,
+ context);
#ifdef __ARM_EABI_UNWINDER__
const _Unwind_Word* e;
// Count.
ue_header->barrier_cache.bitpattern[1] = n;
- // Base (obsolete)
- ue_header->barrier_cache.bitpattern[2] = 0;
+ // Base
+ ue_header->barrier_cache.bitpattern[2] = info.ttype_base;
// Stride.
ue_header->barrier_cache.bitpattern[3] = 4;
// List head.
xh_terminate_handler = xh->terminateHandler;
info.ttype_base = (_Unwind_Ptr) xh->catchTemp;
- try
+ __try
{ __unexpected (xh->unexpectedHandler); }
- catch(...)
+ __catch(...)
{
// Get the exception thrown from unexpected.
__cxa_eh_globals *globals = __cxa_get_globals_fast ();
__cxa_exception *new_xh = globals->caughtExceptions;
- void *new_ptr = new_xh + 1;
+ void *new_ptr = __get_object_from_ambiguous_exception (new_xh);
// We don't quite have enough stuff cached; re-parse the LSDA.
parse_lsda_header (0, xh_lsda, &info);
// If this new exception meets the exception spec, allow it.
- if (check_exception_spec (&info, new_xh->exceptionType,
+ if (check_exception_spec (&info, __get_exception_header_from_obj
+ (new_ptr)->exceptionType,
new_ptr, xh_switch_value))
__throw_exception_again;
// If the exception spec allows std::bad_exception, throw that.
// We don't have a thrown object to compare against, but since
// bad_exception doesn't have virtual bases, that's OK; just pass 0.
-#ifdef __EXCEPTIONS
+#if defined(__EXCEPTIONS) && defined(__GXX_RTTI)
const std::type_info &bad_exc = typeid (std::bad_exception);
if (check_exception_spec (&info, &bad_exc, 0, xh_switch_value))
throw std::bad_exception();
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