88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
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/*
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* Copyright (c) 2009-2017, Farooq Mela
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BACKTRACE_HPP_
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#define BACKTRACE_HPP_
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#include <cstdio>
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#include <string>
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#ifdef _WIN32
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static std::string Backtrace(int skip = 1)
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{
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std::string buf = "Backtrace is not available on Windows.";
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printf("%s\n", buf.c_str());
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return buf;
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}
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#else
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#include <execinfo.h> // for backtrace
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#include <dlfcn.h> // for dladdr
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#include <cxxabi.h> // for __cxa_demangle
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#include <cstdlib>
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#include <sstream>
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// This function produces a stack backtrace with demangled function & method names.
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// Needs compilation with --export-dynamic or -Wl,-export-dynamic
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// From https://gist.github.com/fmela/591333
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static std::string Backtrace(int skip = 1)
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{
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void *callstack[128];
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const int nMaxFrames = sizeof(callstack) / sizeof(callstack[0]);
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char buf[1024];
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int nFrames = backtrace(callstack, nMaxFrames);
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char **symbols = backtrace_symbols(callstack, nFrames);
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std::ostringstream trace_buf;
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for (int i = skip; i < nFrames; i++) {
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printf("%s\n", symbols[i]);
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Dl_info info;
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if (dladdr(callstack[i], &info) && info.dli_sname) {
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char *demangled = NULL;
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int status = -1;
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if (info.dli_sname[0] == '_')
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demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
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snprintf(buf, sizeof(buf), "%-3d %*p %s + %zd\n",
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i, int(2 + sizeof(void*) * 2), callstack[i],
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status == 0 ? demangled :
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info.dli_sname == 0 ? symbols[i] : info.dli_sname,
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(char *)callstack[i] - (char *)info.dli_saddr);
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free(demangled);
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} else {
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snprintf(buf, sizeof(buf), "%-3d %*p %s\n",
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i, int(2 + sizeof(void*) * 2), callstack[i], symbols[i]);
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}
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trace_buf << buf;
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}
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free(symbols);
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if (nFrames == nMaxFrames)
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trace_buf << "[truncated]\n";
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return trace_buf.str();
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}
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#endif // _WIN32
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#endif // BACKTRACE_HPP_
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