Integrated: 8308000: add PopFrame support for virtual threads

[Serguei Spitsyn]

On Tue, 16 May 2023 08:12:21 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> This enhancement adds `PopFrame` support for virtual threads. The spec defines minimal support that the JVMTI `PopFrame` can be used for a virtual thread suspended an an event. 
> Actually, the `PopFrame` can supports suspended and mounted virtual threads. 
> 
> CSR (approved): https://bugs.openjdk.org/browse/JDK-8308001: add PopFrame support for virtual threads
> 
> Testing:
> New test was developed: `serviceability/vthread/PopFrameTest`.
> Submitted mach5 tiers 1-6 are good.
> TBD: rerun mach5 tiers 1-6 at the end of review again if necessary.

This pull request has now been integrated.

Changeset: 928fcf97
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/928fcf975174df0d5020378466e3eb76976afa21
Stats:     469 lines in 8 files changed: 449 ins; 18 del; 2 mod

8308000: add PopFrame support for virtual threads

Reviewed-by: lmesnik, alanb

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PR: https://git.openjdk.org/jdk/pull/14002