core dump 或者 crash dump

core dump:A core dump or a crash dump is a memory snapshot of a running process.

如何获得:

  1. A core dump can be automatically created by the operating system
    when a fatal or unhandled error (for example, signal or system
    exception) occurs.
  2. or can be forced by means of system-provided command-line utilities.
  3. kill -6 on Linux or Solaris systems 将会强制产生一个core 文件,即使程序无响应。
    更多如何获得 参看 这里

IBM JVM(J9) 的javacore 文件和一般进程的core dump 不是一回事。
IBM JVM (J9) java core file: http://www-01.ibm.com/support/docview.wss?uid=swg21393547

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