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 #include <cstring>
  41 #include <cstdlib>
  42
  43 #ifdef __GNUC__
  44 #ifdef HAVE_BACKTRACE
  45 #include <execinfo.h>
  46 #include <cxxabi.h>
  47 #endif // HAVE_BACKTRACE
  48 #endif // __GNUC__
  49
  50
  51 void custom_backtrace(void)
  52 {
  53 #ifdef __GNUC__
  54 #ifdef HAVE_BACKTRACE
  55   void *array[50];
  56
  57   size_t size= backtrace(array, 50);
  58   char **strings= backtrace_symbols(array, size);
  59
  60   fprintf(stderr, "Number of stack frames obtained: %lu\n", (unsigned long)size);
  61
  62   for (size_t x= 1; x < size; x++)
  63   {
  64     size_t sz= 200;
  65     char *function= (char *)malloc(sz);
  66     char *begin= 0;
  67     char *end= 0;
  68
  69     for (char *j = strings[x]; *j; ++j)
  70     {
  71       if (*j == '(') {
  72         begin = j;
  73       }
  74       else if (*j == '+') {
  75         end = j;
  76       }
  77     }
  78     if (begin && end)
  79     {
  80       begin++;
  81       *end= '\0';
  82
  83       int status;
  84       char *ret = abi::__cxa_demangle(begin, function, &sz, &status);
  85       if (ret)
  86       {
  87         function= ret;
  88       }
  89       else
  90       {
  91         strncpy(function, begin, sz);
  92         strncat(function, "()", sz);
  93         function[sz-1] = '\0';
  94       }
  95       fprintf(stderr, "%s\n", function);
  96     }
  97     else
  98     {
  99       fprintf(stderr, "%s\n", strings[x]);
 100     }
 101     free(function);
 102   }
 103
 104
 105   free (strings);
 106 #endif // HAVE_BACKTRACE
 107 #endif // __GNUC__
 108 }