text: #include "muduo/base/Exception.h"
  #include "muduo/base/CurrentThread.h"
  
  namespace muduo
  {
  
  // 发生异常, 输入msg, stack_为当前线程栈帧情况, 来自CurrentThread::stackTrace
  Exception::Exception(string msg)
    : message_(std::move(msg)),
      stack_(CurrentThread::stackTrace(false))
  {
  }
  
  }  // namespace muduo
  