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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/.
*/
#include <sal/config.h>
#include <limits>
#include <memory>
#include <windows.h>
#include <process.h>
#include <iostream>
#define OPTIONAL
#include <DbgHelp.h>
#include <rtl/ustrbuf.hxx>
#include <sal/backtrace.hxx>
#include "backtraceasstring.hxx"
OUString osl::detail::backtraceAsString(sal_uInt32 maxDepth)
{
assert(maxDepth != 0);
auto const maxUlong = std::numeric_limits<ULONG>::max();
if (maxDepth > maxUlong) {
maxDepth = static_cast<sal_uInt32>(maxUlong);
}
OUStringBuffer aBuf;
HANDLE hProcess = GetCurrentProcess();
SymInitialize( hProcess, nullptr, true );
std::unique_ptr<void*[]> aStack(new void*[ maxDepth ]);
// https://msdn.microsoft.com/en-us/library/windows/desktop/bb204633.aspx
// "CaptureStackBackTrace function" claims that you "can capture up to
// MAXUSHORT frames", and on Windows Server 2003 and Windows XP it even
// "must be less than 63", but assume that a too large input value is
// clamped internally, instead of resulting in an error:
sal_uInt32 nFrames = CaptureStackBackTrace( 0, static_cast<ULONG>(maxDepth), aStack.get(), nullptr );
SYMBOL_INFO * pSymbol;
pSymbol = static_cast<SYMBOL_INFO *>(calloc( sizeof( SYMBOL_INFO ) + 1024 * sizeof( char ), 1 ));
pSymbol->MaxNameLen = 1024 - 1;
pSymbol->SizeOfStruct = sizeof( SYMBOL_INFO );
for( sal_uInt32 i = 0; i < nFrames; i++ )
{
SymFromAddr( hProcess, reinterpret_cast<DWORD64>(aStack[ i ]), nullptr, pSymbol );
aBuf.append( (sal_Int32)(nFrames - i - 1) );
aBuf.append( ": " );
aBuf.appendAscii( pSymbol->Name );
aBuf.append( " - 0x" );
aBuf.append( (sal_Int64)pSymbol->Address, 16 );
aBuf.append( "\n" );
}
free( pSymbol );
return aBuf.makeStringAndClear();
}
std::unique_ptr<sal::BacktraceState> sal::backtrace_get(sal_uInt32 maxDepth)
{
assert(maxDepth != 0);
auto const maxUlong = std::numeric_limits<ULONG>::max();
if (maxDepth > maxUlong) {
maxDepth = static_cast<sal_uInt32>(maxUlong);
}
HANDLE hProcess = GetCurrentProcess();
SymInitialize( hProcess, nullptr, true );
auto pStack = new void *[maxDepth];
// https://msdn.microsoft.com/en-us/library/windows/desktop/bb204633.aspx
// "CaptureStackBackTrace function" claims that you "can capture up to
// MAXUSHORT frames", and on Windows Server 2003 and Windows XP it even
// "must be less than 63", but assume that a too large input value is
// clamped internally, instead of resulting in an error:
int nFrames = CaptureStackBackTrace( 0, static_cast<ULONG>(maxDepth), pStack, nullptr );
return std::unique_ptr<BacktraceState>(new BacktraceState{ pStack, nFrames });
}
OUString sal::backtrace_to_string(BacktraceState* backtraceState)
{
OUStringBuffer aBuf;
SYMBOL_INFO * pSymbol;
pSymbol = static_cast<SYMBOL_INFO *>(calloc( sizeof( SYMBOL_INFO ) + 1024 * sizeof( char ), 1 ));
pSymbol->MaxNameLen = 1024 - 1;
pSymbol->SizeOfStruct = sizeof( SYMBOL_INFO );
HANDLE hProcess = GetCurrentProcess();
auto nFrames = backtraceState->nDepth;
for( int i = 0; i < nFrames; i++ )
{
SymFromAddr( hProcess, reinterpret_cast<DWORD64>(backtraceState->buffer[ i ]), nullptr, pSymbol );
aBuf.append( (sal_Int32)(nFrames - i - 1) );
aBuf.append( ": " );
aBuf.appendAscii( pSymbol->Name );
aBuf.append( " - 0x" );
aBuf.append( (sal_Int64)pSymbol->Address, 16 );
aBuf.append( "\n" );
}
free( pSymbol );
return aBuf.makeStringAndClear();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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