On Mar 3, 2011, at 9:47 AM, Rémi Forax wrote:
> Yes. I use an agent so it can have trigger a deoptimization
> even if I don't understand why ?
Here is what I get with a debug build:
$ gamma -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic -cp .
Megamorphic2
Using java runtime at:
/export/twisti/build/hotspot-comp/hotspot/build/jdk-solaris-i586/debug/jre
VM option '+UnlockExperimentalVMOptions'
VM option '+EnableInvokeDynamic'
call from class Megamorphic2 main([Ljava/lang/String;)V
to class Megamorphic2
test(LMegamorphic2$Mapper;LMegamorphic2$Mapper;LMegamorphic2$Mapper;Ljava/util/ArrayList;)V
call from class Megamorphic2
test(LMegamorphic2$Mapper;LMegamorphic2$Mapper;LMegamorphic2$Mapper;Ljava/util/ArrayList;)V
to class Megamorphic2 bar(Ljava/util/ArrayList;LMegamorphic2$Mapper;)V
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/systemDictionary.cpp:2585
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error
(/home/twisti/hotspot-comp/hotspot/src/share/vm/classfile/systemDictionary.cpp:2585),
pid=10916, tid=2
# assert(bsm_oop->is_oop()) failed: must be sane
#
# JRE version: 7.0-b129
# Java VM: Java HotSpot(TM) Server VM (21.0-b02-internal-jvmg mixed mode
solaris-x86 )
# Core dump written. Default location: /home/twisti/mlvm/jsr335/core or
core.10916
#
# An error report file with more information is saved as:
# /home/twisti/mlvm/jsr335/hs_err_pid10916.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
The assert looks like:
7016279: JSR292 Exception when creating CallSites from multiple threads
Is your source code creating CallSites from multiple threads (massively
parallel)?
-- Christian
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