msvc/except.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
 
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
 
#include <sal/config.h>
#include <rtl/ustrbuf.hxx>
#include <osl/mutex.hxx>
 
#include <mutex>
#include <unordered_map>
 
typedef struct _uno_Any uno_Any;
typedef struct _uno_Mapping uno_Mapping;
 
int msvc_filterCppException(EXCEPTION_POINTERS*, uno_Any*, uno_Mapping*);
void msvc_raiseException(uno_Any*, uno_Mapping*);
 
constexpr DWORD MSVC_EH_MAGIC_PARAM = 0x19930520;
// The NT Exception code that msvcrt uses ('msc' | 0xE0000000)
constexpr DWORD MSVC_EH_MAGIC_CODE = 0xE06D7363;
 
#if defined(_M_IX86)
#define MSVC_EH_PARAMETERS 3 // Number of parameters in exception record for x86
#elif defined(_M_AMD64) || defined(_M_ARM64)
#define MSVC_EH_PARAMETERS 4 // Number of parameters in exception record for AMD64
#else
#error "Unsupported machine type"
#endif
 
class type_info;
struct RaiseInfo;
typedef std::unordered_map<OUString, void*> t_string2PtrMap;
typedef struct _typelib_TypeDescription typelib_TypeDescription;
 
// fixed class, because sizeof(ExceptionTypeInfo) must be sizeof(type_info)
// this is tested by a static_assert, so can't break.
class ExceptionTypeInfo final
{
    friend int msvc_filterCppException(EXCEPTION_POINTERS*, uno_Any*, uno_Mapping*);
 
    void* m_data;
    char m_d_name[1];
 
public:
    explicit ExceptionTypeInfo(void* data, const char* d_name) noexcept
        : m_data(data)
    {
        ::strcpy(m_d_name, d_name); // #100211# - checked
    }
    virtual ~ExceptionTypeInfo() noexcept;
};
 
class ExceptionTypeInfoWrapper final
{
    int type_info_size;
    ExceptionTypeInfo info;
 
public:
    explicit ExceptionTypeInfoWrapper(void* m_data, const char* m_d_name) noexcept
        : info(m_data, m_d_name)
    {
        type_info_size = sizeof(ExceptionTypeInfo) + strlen(m_d_name);
    }
 
    type_info* get_type_info() { return reinterpret_cast<type_info*>(&info); }
    int get_type_info_size() { return type_info_size; }
};
 
class RTTInfos final
{
    osl::Mutex m_aMutex;
    t_string2PtrMap m_allRTTI;
 
    RTTInfos() noexcept;
    ExceptionTypeInfoWrapper* getInfo(OUString const& rUNOname) noexcept;
 
public:
    ~RTTInfos();
 
    static type_info* get(OUString const& rUNOname, int* len = nullptr) noexcept;
};
 
class ExceptionInfos final
{
    std::mutex m_aMutex;
    t_string2PtrMap m_allRaiseInfos;
 
public:
    static RaiseInfo* getRaiseInfo(typelib_TypeDescription* pTD) noexcept;
 
    static DWORD allocationGranularity;
 
    ExceptionInfos() noexcept;
    ~ExceptionInfos() noexcept;
};
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */