mexception Class Reference

#include <mexcept.h>

Inheritance diagram for mexception:

Collaboration diagram for mexception:

Public Member Functions
	mexception (const std::string &arg, bool stack_trace, const char *file, int line)
	~mexception () throw ()
const char *	what () const throw ()
	mexception (const mexception &ex) noexcept

Private Attributes
std::string	msg

Friends
std::ostream &	operator<< (std::ostream &output, mexception &m)

Detailed Description

Definition at line 32 of file mexcept.h.

Constructor & Destructor Documentation

mexception() [1/2]

mexception::mexception ( const std::string &  arg, bool  stack_trace, const char *  file, int  line  )

inline

Definition at line 35 of file mexcept.h.

                                                                                  :
           std::runtime_error(arg) {
      std::stringstream trace_buf;
      if (file[0])
         trace_buf << file << ":" << line << ": " << arg;
      else
         trace_buf << arg;
 
      if (stack_trace) {
         // create strack trace and add it to message
         trace_buf << std::endl << "Stack trace:" << std::endl;
         void *callstack[128];
         char buf[1024];
         int n = backtrace(callstack, sizeof(callstack) / sizeof(callstack[0]));
         char **symbols = backtrace_symbols(callstack, n);
         for (int i = 1; i < n; i++) {
            Dl_info info;
            if (dladdr(callstack[i], &info)) {
               char *demangled = nullptr;
               int status = 0;
               demangled = abi::__cxa_demangle(info.dli_sname, nullptr, 0, &status);
               snprintf(buf, sizeof(buf), "%-3d 0x%018lX %s + %zd\n",
                        i, (long unsigned int) callstack[i],
                        status == 0 ? demangled : info.dli_sname,
                        (char *) callstack[i] - (char *) info.dli_saddr);
               free(demangled);
            } else {
               snprintf(buf, sizeof(buf), "%-3d 0x%018lX\n",
                        i, (long unsigned int) callstack[i]);
            }
            trace_buf << buf;
         }
         free(symbols);
      }
 
      msg = trace_buf.str();
   }

Here is the call graph for this function:

~mexception()

mexception::~mexception ( ) throw ( )

inline

Definition at line 73 of file mexcept.h.

{}

mexception() [2/2]

mexception::mexception ( const mexception &  ex )

inlinenoexcept

Definition at line 84 of file mexcept.h.

: std::runtime_error(ex.msg),msg(ex.msg) {};

Member Function Documentation

what()

const char * mexception::what ( ) const throw ( )

inline

Definition at line 75 of file mexcept.h.

                                    {
      return msg.c_str();
   }

Friends And Related Symbol Documentation

operator<<

std::ostream & operator<< ( std::ostream &  output, mexception &  m  )

friend

Definition at line 79 of file mexcept.h.

                                                                    {
      output << m.what();
      return output;
   };

Member Data Documentation

msg

std::string mexception::msg

private

Definition at line 33 of file mexcept.h.

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The documentation for this class was generated from the following file:

• include/mexcept.h