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livetrax/libs/pbd/stacktrace.cc

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/*
* Copyright (C) 2000-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2006-2007 Taybin Rutkin <taybin@taybin.com>
* Copyright (C) 2009-2010 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2013-2015 John Emmas <john@creativepost.co.uk>
* Copyright (C) 2015-2019 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "libpbd-config.h"
#include "pbd/stacktrace.h"
#include "pbd/debug.h"
#include "pbd/demangle.h"
#include "pbd/compose.h"
#include "pbd/pthread_utils.h"
#include <cstdio>
#include <iostream>
#include <string>
#ifdef PLATFORM_WINDOWS
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#include <windows.h>
#include <dbghelp.h>
#endif
void
PBD::trace_twb ()
{
}
/* Obtain a backtrace and print it to stdout. */
#ifdef HAVE_EXECINFO
#include <execinfo.h>
void
PBD::stacktrace (std::ostream& out, int levels)
{
void *array[200];
size_t size;
char **strings;
size_t i;
size = backtrace (array, 200);
if (size) {
strings = backtrace_symbols (array, size);
if (strings) {
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for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
out << " " << demangle (strings[i]) << std::endl;
}
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free (strings);
}
} else {
out << "no stacktrace available!" << std::endl;
}
}
#elif defined (PLATFORM_WINDOWS)
#if defined DEBUG && !defined CaptureStackBackTrace
#define CaptureStackBackTrace RtlCaptureStackBackTrace
extern "C" {
__declspec(dllimport) USHORT WINAPI CaptureStackBackTrace (
ULONG FramesToSkip,
ULONG FramesToCapture,
PVOID *BackTrace,
PULONG BackTraceHash);
}
#endif
void
PBD::stacktrace (std::ostream& out, int)
{
#ifdef DEBUG
const size_t levels = 62; // does not support more then 62 levels of stacktrace
unsigned int i;
void * stack[ levels ];
unsigned short frames;
SYMBOL_INFO * symbol;
HANDLE process;
process = GetCurrentProcess();
out << "+++++Backtrace process: " << DEBUG_THREAD_SELF << std::endl;
SymInitialize (process, NULL, TRUE);
frames = CaptureStackBackTrace (0, levels, stack, NULL);
out << "+++++Backtrace frames: " << frames << std::endl;
symbol = (SYMBOL_INFO*)calloc (sizeof (SYMBOL_INFO) + 256 * sizeof (char), 1);
symbol->MaxNameLen = 255;
symbol->SizeOfStruct = sizeof (SYMBOL_INFO);
for (i = 0; i < frames; ++i) {
SymFromAddr (process, (DWORD64)(stack[i]), 0, symbol);
out << string_compose ("%1: %2 - %3\n", frames - i - 1, symbol->Name, symbol->Address);
}
out.flush ();
free (symbol);
#endif
}
#else
void
PBD::stacktrace (std::ostream& out, int /*levels*/)
{
out << "stack tracing is not enabled on this platform" << std::endl;
}
#endif
#if 0 // unused
extern "C" {
void c_stacktrace () { PBD::stacktrace (std::cout); }
}
#endif