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Test a complete failure of the JVM

· Java Zone

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Say you want to test that your application behaves correctly on restart even after the application crashes. One approach is to trigger a crash in test code and check that data is in a correctable state on restart.

Unsafe unsafe = getUnsafe(); // use reflection
unsafe.setMemory(0, 1, (byte) 0);
This triggers a SIGSEGV
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00000032b967ae09, pid=17870, tid=1082034496
#
# JRE version: 7.0_01-b08
# Java VM: Java HotSpot(TM) 64-Bit Server VM (21.1-b02 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  [libc.so.6+0x7ae09]  memset+0x9
#
If your tests still pass, you can be reasonably confident it is recoverable even on a complete failure of the JVM.

 

From http://vanillajava.blogspot.com/2011/12/test-complete-failure-of-jvm.html

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