git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/backtrace.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  libmcachedd client library.
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37
  38 #include <libmemcached/common.h>
  39
  40 #ifdef AX_ENABLE_BACKTRACE
  41
  42 #ifdef HAVE_EXECINFO_H
  43 # include <execinfo.h>
  44 #endif
  45
  46 #ifdef HAVE_GCC_ABI_DEMANGLE
  47 # include <cxxabi.h>
  48 #endif
  49
  50 #ifdef HAVE_DLFCN_H
  51 # include <dlfcn.h>
  52 #endif
  53
  54 #ifdef HAVE_GCC_ABI_DEMANGLE
  55 # define USE_DEMANGLE 1
  56 #else
  57 # define USE_DEMANGLE 0
  58 #endif
  59
  60 const int MAX_DEPTH= 50;
  61
  62 void custom_backtrace(void)
  63 {
  64 #ifdef HAVE_EXECINFO_H
  65   void *array[MAX_DEPTH];
  66
  67   int backtrace_size= backtrace(array, MAX_DEPTH);
  68   fprintf(stderr, "Number of stack frames obtained: %d\n", backtrace_size);
  69
  70 #ifdef HAVE_DLFCN_H
  71   Dl_info dlinfo;
  72 #endif
  73
  74   for (int x= 0; x < backtrace_size; ++x)
  75   {
  76 #ifdef HAVE_DLFCN_H
  77     if (dladdr(array[x], &dlinfo) == 0)
  78     {
  79       continue;
  80     }
  81 #endif
  82
  83     const char* symname= dlinfo.dli_sname;
  84
  85     int status;
  86     char* demangled= abi::__cxa_demangle(symname, NULL, 0, &status);
  87     if (status == 0 and demangled)
  88     {
  89       symname= demangled;
  90     }
  91
  92     printf("object: %s, function: %s\n", dlinfo.dli_fname, symname);
  93
  94     if (demangled)
  95     {
  96       free(demangled);
  97     }
  98   }
  99 #endif // HAVE_EXECINFO_H
 100
 101 #else // AX_ENABLE_BACKTRACE
 102 void custom_backtrace(void)
 103 {
 104 }
 105 #endif // AX_ENABLE_BACKTRACE