On Thu, 20 Apr 2023 16:40:48 GMT, Serguei Spitsyn <sspit...@openjdk.org> wrote:
>> This enhancement adds support of virtual threads to the JVMTI `StopThread` >> function. >> In preview releases before this enhancement the StopThread returned the >> JVMTI_ERROR_UNSUPPORTED_OPERATION error code for virtual threads. >> >> The `StopThread` supports sending an asynchronous exception to a virtual >> thread only if it is current or suspended at mounted state. For instance, a >> virtual thread can be suspended at a JVMTI event. If the virtual thread is >> not suspended and is not current then the `JVMTI_ERROR_THREAD_NOT_SUSPENDED` >> error code is returned. If the virtual thread was suspended at unmounted >> state then the `JVMTI_ERROR_OPAQUE_FRAME` error code is returned. >> >> The `StopThread` has the following description for >> `JVMTI_ERROR_OPAQUE_FRAME` error code: >>> The thread is a suspended virtual thread and the implementation >>> was unable to throw an asynchronous exception from this frame. >> >> A couple of the `serviceability/jvmti/vthread` tests has been updated to >> adopt to new `StopThread` behavior. >> >> The CSR is: https://bugs.openjdk.org/browse/JDK-8306434 >> >> Testing: >> The mach5 tears 1-6 are in progress. >> Preliminary test runs were good in general. >> The JDB test `vmTestbase/nsk/jdb/kill/kill001/kill001.java` has been >> problem-listed and will be fixed by the corresponding debugger enhancement >> which is going to adopt JDWP/JDI specs to new behavior of the JVMTI >> `StopThread` related to virtual threads. >> >> Also, two JCK JVMTI tests are failing in the tier-6 : >>> vm/jvmti/StopThread/stop001/stop00103/stop00103.html >>> vm/jvmti/StopThread/stop001/stop00103/stop00103a.html >> >> These two tests will be excluded from the test runs by the JCK team and then >> adjusted to new `StopThread` behavior. > > Serguei Spitsyn has updated the pull request incrementally with one > additional commit since the last revision: > > addressed review comments on new test src/hotspot/share/prims/jvmtiEnv.cpp line 1200: > 1198: } > 1199: if (java_thread == nullptr) { // unmounted virtual thread > 1200: return JVMTI_ERROR_OPAQUE_FRAME; Where is the check for "suspended at an event" that otherwise results in `JVMTI_ERROR_OPAQUE_FRAME`? test/hotspot/jtreg/serviceability/jvmti/vthread/StopThreadTest/StopThreadTest.java line 33: > 31: * Its method run() invokes the following methods: > 32: * - method A() that is blocked on a monitor > 33: * - method B() that is stopped at a brakepoint s/brakepoint/breakpoint/ ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/13546#discussion_r1173352162 PR Review Comment: https://git.openjdk.org/jdk/pull/13546#discussion_r1173356185
