0,0 → 1,161 |
// -*- C++ -*- Helpers for calling unextected and terminate |
// Copyright (C) 2001-2015 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 3, or (at your option) |
// any later version. |
// |
// 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. |
// |
// 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 <bits/exception_defines.h> |
#include "unwind-cxx.h" |
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using namespace __cxxabiv1; |
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#include "unwind-pe.h" |
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// Helper routine for when the exception handling code needs to call |
// terminate. |
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extern "C" void |
__cxa_call_terminate(_Unwind_Exception* ue_header) throw () |
{ |
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if (ue_header) |
{ |
// terminate is classed as a catch handler. |
__cxa_begin_catch(ue_header); |
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// Call the terminate handler that was in effect when we threw this |
// exception. */ |
if (__is_gxx_exception_class(ue_header->exception_class)) |
{ |
__cxa_exception* xh; |
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xh = __get_exception_header_from_ue(ue_header); |
__terminate(xh->terminateHandler); |
} |
} |
/* Call the global routine if we don't have anything better. */ |
std::terminate(); |
} |
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#ifdef __ARM_EABI_UNWINDER__ |
// The ARM EABI __cxa_call_unexpected has the same semantics as the generic |
// routine, but the exception specification has a different format. |
extern "C" void |
__cxa_call_unexpected(void* exc_obj_in) |
{ |
_Unwind_Exception* exc_obj |
= reinterpret_cast<_Unwind_Exception*>(exc_obj_in); |
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int rtti_count = 0; |
_Unwind_Word rtti_stride = 0; |
_Unwind_Word* rtti_list = NULL; |
_Unwind_Ptr rtti_base = 0; |
bool foreign_exception; |
std::unexpected_handler unexpectedHandler = NULL; |
std::terminate_handler terminateHandler = NULL; |
__cxa_exception* xh; |
if (__is_gxx_exception_class(exc_obj->exception_class)) |
{ |
// Save data from the EO, which may be clobbered by _cxa_begin_catch. |
xh = __get_exception_header_from_ue(exc_obj); |
unexpectedHandler = xh->unexpectedHandler; |
terminateHandler = xh->terminateHandler; |
rtti_count = exc_obj->barrier_cache.bitpattern[1]; |
rtti_base = (_Unwind_Ptr) exc_obj->barrier_cache.bitpattern[2]; |
rtti_stride = exc_obj->barrier_cache.bitpattern[3]; |
rtti_list = (_Unwind_Word*) exc_obj->barrier_cache.bitpattern[4]; |
foreign_exception = false; |
} |
else |
foreign_exception = true; |
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/* This must be called after extracting data from the EO, but before |
calling unexpected(). */ |
__cxa_begin_catch(exc_obj); |
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// This function is a handler for our exception argument. If we exit |
// by throwing a different exception, we'll need the original cleaned up. |
struct end_catch_protect |
{ |
end_catch_protect() { } |
~end_catch_protect() { __cxa_end_catch(); } |
} end_catch_protect_obj; |
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__try |
{ |
if (foreign_exception) |
std::unexpected(); |
else |
__unexpected(unexpectedHandler); |
} |
__catch(...) |
{ |
/* See if the new exception matches the rtti list. */ |
if (foreign_exception) |
std::terminate(); |
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// Get the exception thrown from unexpected. |
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__cxa_eh_globals* globals = __cxa_get_globals_fast(); |
__cxa_exception* new_xh = globals->caughtExceptions; |
void* new_ptr = __get_object_from_ambiguous_exception (new_xh); |
const std::type_info* catch_type; |
int n; |
bool bad_exception_allowed = false; |
const std::type_info& bad_exc = typeid(std::bad_exception); |
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// Check the new exception against the rtti list |
for (n = 0; n < rtti_count; n++) |
{ |
_Unwind_Word offset; |
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offset = (_Unwind_Word) &rtti_list[n * (rtti_stride >> 2)]; |
offset = _Unwind_decode_typeinfo_ptr(rtti_base, offset); |
catch_type = (const std::type_info*) (offset); |
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if (__cxa_type_match(&new_xh->unwindHeader, catch_type, false, |
&new_ptr) != ctm_failed) |
__throw_exception_again; |
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// 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 NULL. |
void* obj = NULL; |
if (catch_type->__do_catch(&bad_exc, &obj, 1)) |
bad_exception_allowed = true; |
} |
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// If the exception spec allows std::bad_exception, throw that. |
#if __cpp_exceptions |
if (bad_exception_allowed) |
throw std::bad_exception(); |
#endif |
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// Otherwise, die. |
__terminate(terminateHandler); |
} |
} |
#endif // __ARM_EABI_UNWINDER__ |