Bug ID: JDK-8203455 jcmd: VM.metaspace: print loader name for anonymous CLDs.

JDK-8203455 : jcmd: VM.metaspace: print loader name for anonymous CLDs.

Type: Enhancement
Component: hotspot
Sub-Component: runtime
Affected Version: 11

Priority: P4
Status: Resolved
Resolution: Fixed

Submitted: 2018-05-20
Updated: 2018-06-06
Resolved: 2018-05-30

Versions (Unresolved/Resolved/Fixed)

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JDK 11
11 b16Fixed

Related Reports

Relates :	JDK-8203456 - ClassLoaderData::loader_name() should show consistent values
Relates :	JDK-8198553 - jcmd: separate Metaspace statistics from NMT
Relates :	JDK-8203343 - VM.{metaspace\|classloaders\|classhierarchy...} jcmd should show invocation targets for Generated{Method\|Constructor}AccessorImpl classes
Relates :	JDK-8203219 - VM.metaspace jcmd should optionally show loaded classes for loaders
Relates :	JDK-8201572 - Improve Metaspace reporting

Description

VM.metaspace show-loaders can be used to display loaders (well, really CLD instances).

For anonymous CLDs, only "anonymous" is shown. It would be helpful to show to which loader these CLD are assigned.

Example: 

Before:   "272: ClassLoaderData 0x00007f5ba0538f10 for anonymous class"
After:      "268: CLD 0x00007ff0c45738f0 for <anonymous class>, loaded by app, instance of jdk.internal.loader.ClassLoaders$AppClassLoader"