一个生成dump文件的封装类，可以在程序异常退出时将最后的出错信息保存成dump文件，以便于调试。-A dump file generated wrapper class, you can program to quit unexpectedly when the last error information is saved into a dump file for debugging.

pstack-pstack是SunOS上的一个很有用的工具,可以查看core dump文件,调试进程,查看线程运行情况等等。- pstack- print stack trace of running processes pstack dumps a stack trace for a process, given the pid of that process. If the process named is part of a thread group, then all t