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c3785555b9
This feature will only be activated in debug mode, and if available on the platform. The symbols will even be demangled if possible (i.e. if compiled with g++).
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
/*****************************************************************************
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* Eliot
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* Copyright (C) 2010 Olivier Teulière
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* Authors: Olivier Teulière <ipkiss @@ gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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#include "config.h"
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#include <sstream>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include "stacktrace.h"
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#ifdef HAVE_EXECINFO_H
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# include <execinfo.h>
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#endif
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#ifdef HAVE_GCC_ABI_DEMANGLE
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# include <cxxabi.h>
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#endif
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using namespace std;
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string StackTrace::GetStack()
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{
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#if defined HAVE_EXECINFO_H && defined(DEBUG)
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static const int MAX_FRAMES = 42;
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void *frames[MAX_FRAMES];
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// Get the frames
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int nb = backtrace(frames, MAX_FRAMES);
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// Get the corresponding symbols (ignoring the first frame)
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char **symbols = backtrace_symbols(frames + 1, nb - 1);
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// Demangle the symbols and build a nice stack trace
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ostringstream oss;
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for (int i = 0; i < nb - 1; ++i)
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{
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oss << " at " << Demangle(symbols[i]) << endl;
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}
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return oss.str();
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#else
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return "";
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#endif
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}
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// See http://tombarta.wordpress.com/2008/08/01/c-stack-traces-with-gcc/
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// and http://mykospark.net/2009/09/runtime-backtrace-in-c-with-name-demangling/
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// for more details
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string StackTrace::Demangle(char *symbol)
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{
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#if defined HAVE_GCC_ABI_DEMANGLE && defined(DEBUG)
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char temp1[200];
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char temp2[200];
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if (sscanf(symbol, "%199[^(]%*[^_]%199[^)+]", temp1, temp2) == 2)
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{
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// Try to demangle a C++ name
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int status;
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char *demangled = abi::__cxa_demangle(temp2, NULL, NULL, &status);
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if (demangled != NULL)
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{
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string result = temp1 + string(": ") + demangled;
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free(demangled);
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return result;
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}
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// Try to demangle a C name
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else if (sscanf(symbol, "%199s", temp2) == 1)
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{
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return temp1 + string(": ") + temp2;
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}
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}
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// Everything else failed, return the symbol
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#endif
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return symbol;
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}
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