[10] RFR(M) 8182701: Modify JVMCI to allow Graal Compiler to expose platform MBean

Doug Simon doug.simon at oracle.com
Tue Jul 25 08:33:16 UTC 2017

> On 25 Jul 2017, at 01:37, Mandy Chung <mandy.chung at oracle.com> wrote:
> Vladimir,
> I believe you don’t want to add the dependency from JVMCI to java.management.  Otherwise, JVMCI can’t run with only java.base.

The dependency is unfortunate. Can you suggest how JVMCI platform beans could participate in platform bean registration without the dependency?

>  Is the MBean in jdk.internal.vm.compiler or in Lab’s Graal compiler?

Anything in Lab’s Graal compiler is destined for JDK Graal so the distinction is only temporary at best.

> src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/services/src/jdk/vm/ci/services/internal/JVMCIMXBeans.java
> - I suspect this file meant to be in src/jdk.internal.vm.ci/share/classes/src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/services/internal/JVMCIMXBeans.java

Not sure I follow - there is currently no such directory src/jdk.internal.vm.ci/share/classes/src


>> On Jul 12, 2017, at 2:20 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
>> https://bugs.openjdk.java.net/browse/JDK-8182701
>> webrev:
>> http://cr.openjdk.java.net/~kvn/8182701/webrev.jdk/
>> http://cr.openjdk.java.net/~kvn/8182701/webrev.hs/
>> Contributed by Jaroslav Tulach.
>> JDK itself contains quite a lot of platform MBeans which get registered "on demand". Graal compiler (jdk.internal.vm.compiler) provides its own MBean(s) - however currently there is no way to register it "on demand". JDK9 already contains support for collecting platform MBeans from various modules. We just need to expose Graal MBean through JVMCI.
>> Thanks,
>> Vladimir

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