Fix disabling virtual thread context propagation

[laurit]

Resolves #10747
Continuation of #10854

[Moscagus]

@laurit the investigation was always based on the latest version of "VirtualThread.java"
https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/lang/VirtualThread.java
The signatures are:
private void switchToCarrierThread()
private void switchToVirtualThread(VirtualThread vthread)

But in java 21+13:
https://github.com/openjdk/jdk/blob/jdk-21%2B13/src/java.base/share/classes/java/lang/VirtualThread.java
The signatures are:
private boolean switchToCarrierThread()
private void switchToVirtualThread(VirtualThread vthread, boolean notifyJvmti)

Maybe for this reason the "advices" in "VirtualThreadInstrumentation" are never executed.

[laurit]

@laurit the investigation was always based on the latest version of "VirtualThread.java" https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/lang/VirtualThread.java The signatures are: private void switchToCarrierThread() private void switchToVirtualThread(VirtualThread vthread)

But in java 21+13: https://github.com/openjdk/jdk/blob/jdk-21%2B13/src/java.base/share/classes/java/lang/VirtualThread.java The signatures are: private boolean switchToCarrierThread() private void switchToVirtualThread(VirtualThread vthread, boolean notifyJvmti)

Maybe for this reason the "advices" in "VirtualThreadInstrumentation" are never executed.

I don't think so. It was never executed because by default some classes are excluded from instrumentation and I forgot to enable it for the virtual thread class.
I din't realize that 21+13 is an early access version, 2 arg switchToVirtualThread should be handled with #10887

[Moscagus]

Can you generate a snapshot for me to test in my productive environment ?

[laurit]

Can you generate a snapshot for me to test in my productive environment ?

you can find the jar in the artifacts section of the PR https://github.com/open-telemetry/opentelemetry-java-instrumentation/actions/runs/8340418609 or in https://oss.sonatype.org/content/repositories/snapshots/io/opentelemetry/javaagent/opentelemetry-javaagent/2.3.0-SNAPSHOT/ after the PR is merged

[Moscagus]

After several tests with 1 million virtual threads, I'm pretty sure the solution works.
Thanks @laurit