Number of crashes on java.lang.Thread.exit() was got during 6u24 b01 testing

I was not able to reproduce them in many attempts, so I can not identify whether it is regression or not.

They all seem to be the same. However, they are all happened in the conditions of low memory.

Also, mention that all these crashes happend on solaris zone.

# A fatal error has been detected by the Java Runtime Environment:
#
# SIGBUS (0xa) at pc=0xffffffff7880bfc4, pid=3688, tid=19
#
# JRE version: 6.0_24-b01
# Java VM: Java HotSpot(TM) 64-Bit Server VM (19.1-b01 mixed mode solaris-sparc )
# Problematic frame:
# j java.lang.Thread.exit()V+0

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