Client compiler (-client -Xcomp) with enabled ExtendedDTraceProbes option
hangs java process.

See "jstack -F -l <java_pid>", "jstack -F -m <java_pid>", "pstack
<java_pid>" logs in attachment.


As result this bug causes dtrace/hotspot/Monitors/Monitors001/ test to be failed.

To reproduce do:
1. cd /home/ep155969/bugs/ExtendedProbes_bug
2. bash Monitors001.tlog
    or
   bash reproduce_bug.sh Monitors001.tlog


Tested JDK:
java version "1.6.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-rc-b70)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b70, compiled mode)

I wasn't able to reproduce this bug with Server compiler.

----

Fastdebug version also fails. The log is:

#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (/BUILD_AREA/jdk6.0/hotspot/src/cpu/sparc/vm/assembler_sparc.cpp, 1852 [ Patched ]), pid=10795, tid=2
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0-rc-fastdebug-b70-debug compiled mode)
#
# Error: assert(false,"error")
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

To reproduce under fastdebug do:
1. cd /home/ep155969/bugs/ExtendedProbes_bug
2. bash Monitors001.tlog_debug


Following tests also fail the same assertion under fastdebug:
 dtrace/hotspot/MethodInvocation/MethodInvocation001
 dtrace/hotspot/MethodInvocation/MethodInvocation002
 dtrace/hotspot/ObjectAllocation/ObjectAllocation001
 dtrace/hotspot/ObjectAllocation/ObjectAllocation002

(added just to include these tests in known bugs list)