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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <uno/mapping.h>
#include <typeinfo>
#include <exception>
#include <cstddef>
namespace CPPU_CURRENT_NAMESPACE
{
// From opensource.apple.com: libunwind-35.1/include/unwind.h
typedef enum {
_URC_NO_REASON = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_FATAL_PHASE2_ERROR = 2,
_URC_FATAL_PHASE1_ERROR = 3,
_URC_NORMAL_STOP = 4,
_URC_END_OF_STACK = 5,
_URC_HANDLER_FOUND = 6,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8
} _Unwind_Reason_Code;
struct _Unwind_Exception
{
uint64_t exception_class;
void (*exception_cleanup)(_Unwind_Reason_Code reason, struct _Unwind_Exception* exc);
uintptr_t private_1; // non-zero means forced unwind
uintptr_t private_2; // holds sp that phase1 found for phase2 to use
#if !__LP64__
// The gcc implementation of _Unwind_Exception used attribute mode on the above fields
// which had the side effect of causing this whole struct to round up to 32 bytes in size.
// To be more explicit, we add pad fields added for binary compatibility.
uint32_t reserved[3];
#endif
};
// From libcppabi-24.2/include/unwind-cxx.h
typedef unsigned _Unwind_Ptr __attribute__((__mode__(__pointer__)));
// A C++ exception object consists of a header, which is a wrapper around
// an unwind object header with additional C++ specific information,
// followed by the exception object itself.
struct __cxa_exception
{
#if __LP64__
#if 0
// This is a new field added with LLVM 10
// <https://github.com/llvm/llvm-project/commit/674ec1eb16678b8addc02a4b0534ab383d22fa77>
// "[libcxxabi] Insert padding in __cxa_exception struct for compatibility". The HACK in
// fillUnoException (bridges/source/cpp_uno/gcc3_macosx_x86-64/except.cxx) tries to find out at
// runtime whether a __cxa_exception has this member. Once we can be sure that we only run
// against new libcxxabi that has this member, we can drop the "#if 0" here and drop the hack
// in fillUnoException.
// Now _Unwind_Exception is marked with __attribute__((aligned)),
// which implies __cxa_exception is also aligned. Insert padding
// in the beginning of the struct, rather than before unwindHeader.
void *reserve;
#endif
// This is a new field to support C++ 0x exception_ptr.
// For binary compatibility it is at the start of this
// struct which is prepended to the object thrown in
// __cxa_allocate_exception.
size_t referenceCount;
#endif
// Manage the exception object itself.
std::type_info *exceptionType;
void (*exceptionDestructor)(void *);
// The C++ standard has entertaining rules wrt calling set_terminate
// and set_unexpected in the middle of the exception cleanup process.
void (*unexpectedHandler)(); // std::unexpected_handler dropped from C++17
std::terminate_handler terminateHandler;
// The caught exception stack threads through here.
__cxa_exception *nextException;
// How many nested handlers have caught this exception. A negated
// value is a signal that this object has been rethrown.
int handlerCount;
#ifdef __ARM_EABI_UNWINDER__
// Stack of exceptions in cleanups.
__cxa_exception* nextPropagatingException;
// The number of active cleanup handlers for this exception.
int propagationCount;
#else
// Cache parsed handler data from the personality routine Phase 1
// for Phase 2 and __cxa_call_unexpected.
int handlerSwitchValue;
const unsigned char *actionRecord;
const unsigned char *languageSpecificData;
_Unwind_Ptr catchTemp;
void *adjustedPtr;
#endif
#if !__LP64__
// This is a new field to support C++ 0x exception_ptr.
// For binary compatibility it is placed where the compiler
// previously adding padded to 64-bit align unwindHeader.
size_t referenceCount;
#endif
// The generic exception header. Must be last.
_Unwind_Exception unwindHeader;
};
// Each thread in a C++ program has access to a __cxa_eh_globals object.
struct __cxa_eh_globals
{
__cxa_exception *caughtExceptions;
unsigned int uncaughtExceptions;
#ifdef __ARM_EABI_UNWINDER__
__cxa_exception* propagatingExceptions;
#endif
};
}
extern "C" CPPU_CURRENT_NAMESPACE::__cxa_eh_globals *__cxa_get_globals () noexcept;
namespace CPPU_CURRENT_NAMESPACE
{
void raiseException(
uno_Any * pUnoExc, uno_Mapping * pUno2Cpp );
void fillUnoException(uno_Any *, uno_Mapping * pCpp2Uno);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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