libtorrent/src/assert.cpp

   1 /*
   2
   3 Copyright (c) 2007, Arvid Norberg
   4 All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions
   8 are met:
   9
  10     * Redistributions of source code must retain the above copyright
  11       notice, this list of conditions and the following disclaimer.
  12     * Redistributions in binary form must reproduce the above copyright
  13       notice, this list of conditions and the following disclaimer in
  14       the documentation and/or other materials provided with the distribution.
  15     * Neither the name of the author nor the names of its
  16       contributors may be used to endorse or promote products derived
  17       from this software without specific prior written permission.
  18
  19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29 POSSIBILITY OF SUCH DAMAGE.
  30
  31 */
  32
  33 #ifdef __GNUC__
  34
  35 #include <cxxabi.h>
  36 #include <string>
  37 #include <cstring>
  38 #include <stdlib.h>
  39
  40 std::string demangle(char const* name)
  41 {
  42 // in case this string comes
  43         char const* start = strchr(name, '(');
  44         if (start != 0) ++start;
  45         else start = name;
  46         char const* end = strchr(start, '+');
  47
  48         std::string in;
  49         if (end == 0) in.assign(start);
  50         else in.assign(start, end);
  51
  52         size_t len;
  53         int status;
  54         char* unmangled = ::abi::__cxa_demangle(in.c_str(), 0, &len, &status);
  55         if (unmangled == 0) return in;
  56         std::string ret(unmangled);
  57         free(unmangled);
  58         return ret;
  59 }
  60
  61 #endif
  62
  63 #ifndef NDEBUG
  64
  65 #include <stdlib.h>
  66 #include <stdio.h>
  67 #include <signal.h>
  68 #if defined __linux__ && defined __GNUC__
  69 #include <execinfo.h>
  70 #endif
  71
  72 void assert_fail(char const* expr, int line, char const* file, char const* function)
  73 {
  74
  75         fprintf(stderr, "assertion failed. Please file a bugreport at "
  76                 "http://code.rasterbar.com/libtorrent/newticket\n"
  77                 "Please include the following information:\n\n"
  78                 "file: '%s'\n"
  79                 "line: %d\n"
  80                 "function: %s\n"
  81                 "expression: %s\n"
  82                 "stack:\n", file, line, function, expr);
  83
  84 #if defined __linux__ && defined __GNUC__
  85         void* stack[50];
  86         int size = backtrace(stack, 50);
  87         char** symbols = backtrace_symbols(stack, size);
  88
  89         for (int i = 0; i < size; ++i)
  90         {
  91                 fprintf(stderr, "%d: %s\n", i, demangle(symbols[i]).c_str());
  92         }
  93
  94         free(symbols);
  95 #endif
  96         // send SIGINT to the current process
  97         // to break into the debugger
  98         raise(SIGINT);
  99         abort();
 100 }
 101
 102 #else
 103
 104 void assert_fail(char const* expr, int line, char const* file, char const* function) {}
 105
 106 #endif
 107