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/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Libgearman client library.
*
* Copyright (C) 2012 Data Differential, http://datadifferential.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * The names of its contributors may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "gear_config.h"
#include "libgearman/backtrace.hpp"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#if defined(HAVE_SHARED_ENABLED) && HAVE_SHARED_ENABLED
#ifdef HAVE_EXECINFO_H
#include <execinfo.h>
#endif
#ifdef HAVE_GCC_ABI_DEMANGLE
# include <cxxabi.h>
# ifdef HAVE_DLFCN_H
# define USE_DEMANGLE 1
# include <dlfcn.h>
# else
# define USE_DEMANGLE 0
# endif
#endif
const int MAX_DEPTH= 50;
void custom_backtrace(void)
{
#ifdef HAVE_EXECINFO_H
void *backtrace_buffer[MAX_DEPTH +1];
int stack_frames= backtrace(backtrace_buffer, MAX_DEPTH);
fprintf(stderr, "\nBegin stack trace, frames found: %d\n", stack_frames);
if (stack_frames)
{
char **symbollist= backtrace_symbols(backtrace_buffer, stack_frames);
if (symbollist)
{
for (int x= 0; x < stack_frames; x++)
{
bool was_demangled= false;
#if defined(USE_DEMANGLE)
if (USE_DEMANGLE)
{
Dl_info dlinfo;
if (dladdr(backtrace_buffer[x], &dlinfo))
{
char demangled_buffer[1024];
const char *called_in= "<unresolved>";
if (dlinfo.dli_sname)
{
size_t demangled_size= sizeof(demangled_buffer);
int status;
char* demangled;
if ((demangled= abi::__cxa_demangle(dlinfo.dli_sname, demangled_buffer, &demangled_size, &status)))
{
called_in= demangled;
fprintf(stderr, "---> demangled: %s -> %s\n", demangled_buffer, demangled);
}
else
{
called_in= dlinfo.dli_sname;
}
was_demangled= true;
fprintf(stderr, "#%d %p in %s at %s\n",
x, backtrace_buffer[x],
called_in,
dlinfo.dli_fname);
}
}
}
#endif // USE_DEMANGLE
if (was_demangled == false)
{
fprintf(stderr, "?%d %p in %s\n", x, backtrace_buffer[x], symbollist[x]);
}
}
::free(symbollist);
}
}
#endif // HAVE_EXECINFO_H
}
#else // HAVE_SHARED_ENABLED
void custom_backtrace(void)
{
fprintf(stderr, "Backtrace null function called\n");
}
#endif // AX_ENABLE_BACKTRACE
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