RFR: 8308000: add PopFrame support for virtual threads

[Serguei Spitsyn]

On Wed, 17 May 2023 01:03:52 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> test/hotspot/jtreg/serviceability/jvmti/vthread/PopFrameTest/PopFrameTest.java line 62:
>> 
>>> 60:     static final int FAILED = 2;
>>> 61: 
>>> 62:     static void log(String str) { System.out.println(str); }
>> 
>> Better to flush system.out after each print.
>
> System.out has autoflush enabled so `println` will trigger a flush.

David is correct - thanks.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14002#discussion_r1196128985