source/debug/backtrace.cpp

   1 /* $Id$
   2
   3 This file is part of libmspcore
   4 Copyright © 2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 // Must include something to test for glibc
   9 #include <cstdlib>
  10 #if !defined(WIN32) && defined(__GLIBC__)
  11 #include <dlfcn.h>
  12 #include <execinfo.h>
  13 #endif
  14 #include "backtrace.h"
  15 #include "demangle.h"
  16
  17 using namespace std;
  18
  19 namespace Msp {
  20 namespace Debug {
  21
  22 Backtrace Backtrace::create()
  23 {
  24 #if !defined(WIN32) && defined(__GLIBC__)
  25         void *addresses[50];
  26         int count = ::backtrace(addresses, 50);
  27
  28         Backtrace bt;
  29         Dl_info dli;
  30         for(int i=0; i<count; ++i)
  31         {
  32                 StackFrame frame;
  33                 frame.address = addresses[i];
  34                 if(dladdr(addresses[i], &dli))
  35                 {
  36                         frame.file = dli.dli_fname;
  37                         if(dli.dli_sname)
  38                                 frame.symbol = demangle(dli.dli_sname);
  39                 }
  40                 else
  41                         frame.file = "<unknown>";
  42                 bt.frames.push_back(frame);
  43         }
  44
  45         return bt;
  46 #else
  47         return Backtrace();
  48 #endif
  49 }
  50
  51 ostream &operator<<(ostream &out, const Backtrace &bt)
  52 {
  53         const list<Backtrace::StackFrame> &frames = bt.get_frames();
  54         for(list<Backtrace::StackFrame>::const_iterator i=frames.begin(); i!=frames.end(); ++i)
  55                 out<<*i<<'\n';
  56
  57         return out;
  58 }
  59
  60 ostream &operator<<(ostream &out, const Backtrace::StackFrame &sf)
  61 {
  62         out<<sf.address;
  63         if(!sf.symbol.empty())
  64                 out<<" in "<<sf.symbol;
  65         out<<" from "<<sf.file;
  66
  67         return out;
  68 }
  69
  70 } // namespace Debug
  71 } // namespace Msp