ceph/src/common/BackTrace.h

   1 #ifndef CEPH_BACKTRACE_H
   2 #define CEPH_BACKTRACE_H
   3
   4 #include "acconfig.h"
   5 #include <iosfwd>
   6 #ifdef HAVE_EXECINFO_H
   7 #include <execinfo.h>
   8 #endif
   9 #include <stdlib.h>
  10
  11 namespace ceph {
  12
  13 struct BackTrace {
  14   const static int max = 100;
  15
  16   int skip;
  17   void *array[max];
  18   size_t size;
  19   char **strings;
  20
  21   explicit BackTrace(int s) : skip(s) {
  22 #ifdef HAVE_EXECINFO_H
  23     size = backtrace(array, max);
  24     strings = backtrace_symbols(array, size);
  25 #else
  26     skip = 0;
  27     size = 0;
  28     strings = nullptr;
  29 #endif
  30   }
  31   ~BackTrace() {
  32     free(strings);
  33   }
  34
  35   BackTrace(const BackTrace& other);
  36   const BackTrace& operator=(const BackTrace& other);
  37
  38   void print(std::ostream& out) const;
  39 };
  40
  41 inline std::ostream& operator<<(std::ostream& out, const BackTrace& bt) {
  42   bt.print(out);
  43   return out;
  44 }
  45
  46 }
  47
  48 #endif