~brianaker/gearmand/osx9-fixes

/*  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

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 *

 */

#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