source/debug/backtrace.cpp

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