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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /sal/osl/w32/backtrace.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | sal/osl/w32/backtrace.cxx | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/sal/osl/w32/backtrace.cxx b/sal/osl/w32/backtrace.cxx new file mode 100644 index 000000000..d9231de44 --- /dev/null +++ b/sal/osl/w32/backtrace.cxx @@ -0,0 +1,92 @@ +/* -*- 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> + +#if !defined WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +#endif +#include <windows.h> +#include <process.h> +#include <iostream> +#define OPTIONAL +#include <DbgHelp.h> + +#include <rtl/ustrbuf.hxx> +#include <sal/backtrace.hxx> + +#include <backtraceasstring.hxx> + +namespace { + +template<typename T> T clampToULONG(T n) { + auto const maxUlong = std::numeric_limits<ULONG>::max(); + return n > maxUlong ? static_cast<T>(maxUlong) : n; +} + +} + +OUString osl::detail::backtraceAsString(sal_uInt32 maxDepth) +{ + std::unique_ptr<sal::BacktraceState> backtrace = sal::backtrace_get( maxDepth ); + return sal::backtrace_to_string( backtrace.get()); +} + +std::unique_ptr<sal::BacktraceState> sal::backtrace_get(sal_uInt32 maxDepth) +{ + assert(maxDepth != 0); + maxDepth = clampToULONG(maxDepth); + + 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) +{ + HANDLE hProcess = GetCurrentProcess(); + // https://docs.microsoft.com/en-us/windows/win32/api/dbghelp/nf-dbghelp-syminitialize + // says to not initialize more than once. + [[maybe_unused]] static bool bInitialized = SymInitialize(hProcess, nullptr, false); + SymRefreshModuleList(hProcess); + SYMBOL_INFO * pSymbol; + pSymbol = static_cast<SYMBOL_INFO *>(calloc( sizeof( SYMBOL_INFO ) + 1024 * sizeof( char ), 1 )); + assert(pSymbol); + pSymbol->MaxNameLen = 1024 - 1; + pSymbol->SizeOfStruct = sizeof( SYMBOL_INFO ); + + auto nFrames = backtraceState->nDepth; + OUStringBuffer aBuf; + for( int i = 0; i < nFrames; i++ ) + { + SymFromAddr( hProcess, reinterpret_cast<DWORD64>(backtraceState->buffer[ i ]), nullptr, pSymbol ); + aBuf.append( static_cast<sal_Int32>(nFrames - i - 1) ); + aBuf.append( ": " ); + aBuf.appendAscii( pSymbol->Name ); + aBuf.append( " - 0x" ); + aBuf.append( static_cast<sal_Int64>(pSymbol->Address), 16 ); + aBuf.append( "\n" ); + } + + free( pSymbol ); + + return aBuf.makeStringAndClear(); +} + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |