RFR: 8257700: Add logging for sealed classes in JVM_GetPermittedSubclasses [v2]

[David Holmes]

On Tue, 15 Dec 2020 21:58:09 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

>> Please review this small fix for JDK-8257700 to add logging to JVM_GetPermittedSubclasses().  The fix was tested with Mach5 tiers 1 and 2 on Linux, MacOS, and WIndows, tiers 3-5 on Linux x64, and by running the hotspot runtime sealed tests with -Xlog:class+sealed=trace and looking at the output.
>> 
>> Thanks, Harold
>
> Harold Seigel has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8257700: Add logging for sealed classes in JVM_GetPermittedSubclasses

Hi Harold,
Looks good. One minor comment below.
Thanks,
David

src/hotspot/share/prims/jvm.cpp line 2168:

> 2166:       // we had invalid entries so we need to compact the array
> 2167:       log_trace(class, sealed)(" - compacting array from length %d to %d",
> 2168:                                length, count);

Not sure this really adds any useful information, but your call.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1780