Linux下打印调用堆栈

Posted 2022-12-14 startFromWeb

废话不说直接写代码 不懂函数自己去man

void Exception::fillStackTrace()

  const int len = 200;
  void* buffer[len];
  int nptrs = ::backtrace(buffer, len);
  char** strings = ::backtrace_symbols(buffer, nptrs);
  if (strings)
  
    for (int i = 0; i < nptrs; ++i)
    
      // TODO demangle funcion name with abi::__cxa_demangle
      //stack_.append(strings[i]);
	  stack_.append(demangle(strings[i]));
      stack_.push_back('\\n');
    
    free(strings);
  


string Exception::demangle(const char* symbol)

  size_t size;
  int status;
  char temp[128];
  char* demangled;
  //first, try to demangle a c++ name
  if (1 == sscanf(symbol, "%*[^(]%*[^_]%127[^)+]", temp)) 
    if (NULL != (demangled = abi::__cxa_demangle(temp, NULL, &size, &status))) 
      string result(demangled);
      free(demangled);
      return result;
    
  
  //if that didn't work, try to get a regular c symbol
  if (1 == sscanf(symbol, "%127s", temp)) 
    return temp;
  
 
  //if all else fails, just return the symbol
  return symbol;