ceph/src/common/BackTrace.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_BACKTRACE_H
   5 #define CEPH_BACKTRACE_H
   6
   7 #include "acconfig.h"
   8 #include <iosfwd>
   9 #ifdef HAVE_EXECINFO_H
  10 #include <execinfo.h>
  11 #endif
  12 #include <stdlib.h>
  13
  14 #include <list>
  15 #include <string>
  16
  17 namespace ceph {
  18
  19 class Formatter;
  20
  21 struct BackTrace {
  22   virtual ~BackTrace() {}
  23   virtual void print(std::ostream& out) const = 0;
  24   virtual void dump(Formatter *f) const = 0;
  25 };
  26
  27 inline std::ostream& operator<<(std::ostream& out, const BackTrace& bt) {
  28   bt.print(out);
  29   return out;
  30 }
  31
  32
  33 struct ClibBackTrace : public BackTrace {
  34   const static int max = 32;
  35
  36   int skip;
  37   void *array[max]{};
  38   size_t size;
  39   char **strings;
  40
  41   explicit ClibBackTrace(int s) {
  42 #ifdef HAVE_EXECINFO_H
  43     skip = s;
  44     size = backtrace(array, max);
  45     strings = backtrace_symbols(array, size);
  46 #else
  47     skip = 0;
  48     size = 0;
  49     strings = nullptr;
  50 #endif
  51   }
  52   ~ClibBackTrace() {
  53     free(strings);
  54   }
  55
  56   ClibBackTrace(const ClibBackTrace& other);
  57   const ClibBackTrace& operator=(const ClibBackTrace& other);
  58
  59   void print(std::ostream& out) const override;
  60   void dump(Formatter *f) const override;
  61
  62   static std::string demangle(const char* name);
  63 };
  64
  65
  66 struct PyBackTrace : public BackTrace {
  67   std::list<std::string> strings;
  68
  69   explicit PyBackTrace(std::list<std::string>& s) : strings(s) {}
  70
  71   void dump(Formatter *f) const override;
  72   void print(std::ostream& out) const override;
  73 };
  74
  75
  76 }
  77
  78 #endif