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/*
Copyright (C) 2000-2007 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "libpbd-config.h"
#include "pbd/stacktrace.h"
#include "pbd/debug.h"
#include "pbd/compose.h"
#include "pbd/pthread_utils.h"
#include <cstdio>
#include <iostream>
#include <string>
#ifdef PLATFORM_WINDOWS
#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>
#include <cxxabi.h>
static std::string
symbol_demangle (const std::string& l)
{
int status;
try {
char* realname = abi::__cxa_demangle (l.c_str(), 0, 0, &status);
std::string d (realname);
free (realname);
return d;
} catch (std::exception) {
}
return l;
}
std::string
PBD::demangle (std::string const & l)
{
std::string::size_type const b = l.find_first_of ("(");
if (b == std::string::npos) {
return symbol_demangle (l);
}
std::string::size_type const p = l.find_last_of ("+");
if (p == std::string::npos) {
return symbol_demangle (l);
}
if ((p - b) <= 1) {
return symbol_demangle (l);
}
std::string const fn = l.substr (b + 1, p - b - 1);
return symbol_demangle (fn);
}
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) {
for (i = 0; i < size && (levels == 0 || i < size_t(levels)); i++) {
out << " " << demangle (strings[i]) << std::endl;
}
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
std::string
PBD::demangle (std::string const & l) /* JE - !!!! 'PBD' namespace might possibly get removed (except it's still used in 'libs/canvas/item.cc') */
{
return std::string();
}
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
}
void
c_stacktrace ()
{
PBD::stacktrace (std::cout);
}
#else
std::string
PBD::demangle (std::string const & l) /* JE - !!!! 'PBD' namespace might possibly get removed (except it's still used in 'libs/canvas/item.cc') */
{
return std::string();
}
void
PBD::stacktrace (std::ostream& out, int /*levels*/)
{
out << "stack tracing is not enabled on this platform" << std::endl;
}
void
c_stacktrace ()
{
PBD::stacktrace (std::cout);
}
#endif /* HAVE_EXECINFO */
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