[prev in list] [next in list] [prev in thread] [next in thread] 

List:       openjdk-serviceability-dev
Subject:    Re: RFR: 8258471: "search codecache" clhsdb command does not work
From:       Serguei Spitsyn <sspitsyn () openjdk ! java ! net>
Date:       2020-12-18 3:30:56
Message-ID: gOg3NYAaR_OFR-5UJB-gvTBj66Wk2fn0i7NS1HWz5Q4=.a3283793-d09d-4187-8823-f22ff6fffd1d () github ! com
[Download RAW message or body]

On Wed, 16 Dec 2020 10:27:05 GMT, Yasumasa Suenaga <ysuenaga@openjdk.org> wrote:

> `search codecache` command does not work as following:
> 
> hsdb> search codecache 0x7fedbd0aec90
> java.lang.RuntimeException: Unable to deduce type of CodeBlob from address \
> 0x00007fedbc85e810 (expected type nmethod, RuntimeStub, SafepointBlob, \
> DeoptimizationBlob, or ExceptionBlob) at \
> jdk.hotspot.agent/sun.jvm.hotspot.code.CodeCache.createCodeBlobWrapper(CodeCache.java:177)
>  at jdk.hotspot.agent/sun.jvm.hotspot.memory.CodeHeap.iterate(CodeHeap.java:111)
> at jdk.hotspot.agent/sun.jvm.hotspot.code.CodeCache.iterate(CodeCache.java:185)
> at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor$40.doit(CommandProcessor.java:1535)
>  at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2051)
>  at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2021)
>  at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.run(CommandProcessor.java:1901)
>  at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.run(CLHSDB.java:99)
> at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.main(CLHSDB.java:40)
> at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runCLHSDB(SALauncher.java:280)
> at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:483)
> 
> I checked the Object which points 0x7fedbd0aec90, it was `VtableBlob`. It has been \
> introduced in [JDK-8199406](https://bugs.openjdk.java.net/browse/JDK-8199406), but \
> it did not change SA code. 
> SA should support `VtableBlob`.

Hi Yasumasa,
It looks good.
Thanks,
Serguei

-------------

Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1800


[prev in list] [next in list] [prev in thread] [next in thread]