Integrated: 8297286: runtime/vthread tests crashing after JDK-8296324

[Serguei Spitsyn]

On Wed, 22 Mar 2023 02:12:12 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

> The fix is to enable virtual threads support for late binding JVMTI agents.
> The fix includes:
> - New function `JvmtiEnvBase::enable_virtual_threads_notify_jvmti()` which does enabling JVMTI VTMS transition notifications in case of agent loaded into running VM. This function executes a VM operation counting VTMS transition bits in all `JavaThread`'s to correctly set the static counter `_VTMS_transition_count` needed for VTMS transition protocol.
> - New function `JvmtiEnvBase::disable_virtual_threads_notify_jvmti()` which is needed for testing. It is used by the `WhiteBox` API.
> - New WhiteBox function `WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable)` needed for testing of this update.
> - New regression test: `serviceability/jvmti/vthread/ToggleNotifyJvmtiTest`
> 
> Testing:
> - New test: `serviceability/jvmti/vthread/ToggleNotifyJvmtiTest`
> - The originally failed tests are expected to pass now:
>   `runtime/vthread/RedefineClass.java`
>   `runtime/vthread/TestObjectAllocationSampleEvent.java` 
> - In progress: Run the tiers 1-6 to make sure there are no regression.

This pull request has now been integrated.

Changeset: a1a9ec6e
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/a1a9ec6e46b70d5436711f89f4bf603ebacc8060
Stats:     574 lines in 15 files changed: 554 ins; 9 del; 11 mod

8297286: runtime/vthread tests crashing after JDK-8296324

Reviewed-by: lmesnik, pchilanomate, cjplummer

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PR: https://git.openjdk.org/jdk/pull/13133