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         for(const Backtrace::StackFrame &f: bt.get_frames())
  47                 out << f << '\n';
  48
  49         return out;
  50 }
  51
  52 ostream &operator<<(ostream &out, const Backtrace::StackFrame &sf)
  53 {
  54         out << sf.address;
  55         if(!sf.symbol.empty())
  56                 out << " in " << sf.symbol;
  57         out << " from " << sf.file;
  58
  59         return out;
  60 }
  61
  62 } // namespace Debug
  63 } // namespace Msp