JVMTI resume and suspend for virtual and carrier threads

[Babneet B Singh]

I would like to request clarification on how JVMTI resume and suspend work for a virtual thread and its associated carrier thread.

Virtual thread runs on a carrier thread. Both are separate Java objects. JVMTI functions can be invoked separately on them. What is the relationship between the state of a virtual and carrier thread when JVMTI suspend and resume functions are invoked on them?

jvmti->SuspendThread(virtualThread) // Will this also suspend the carrier thread?
jvmti->SuspendThread(carrierThread) // Will this also suspend the virtual thread?
jvmti->ResumeThread(virtualThread) // Will this resume both virtual thread and its carrier thread?
jvmti->ResumeThread(carrierThread) // Will this just resume the carrier thread and virtual thread will stay suspended?

Can someone please provide the exact behaviour for the above JVMTI calls?

Regards,
Babneet





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