On Thu, 16 Mar 2023 05:03:51 GMT, Serguei Spitsyn <sspit...@openjdk.org> wrote:
> This is needed for future performance/scalability improvements in JVMTI > support of virtual threads. > The update includes the following: > > 1. Refactored the `VirtualThread` native methods: > `notifyJvmtiMountBegin` and `notifyJvmtiMountEnd` => > `notifyJvmtiMount` > `notifyJvmtiUnmountBegin` and `notifyJvmtiUnmountEnd` => > `notifyJvmtiUnmount` > 2. Still useful implementation of old native methods is moved from `jvm.cpp` > to `jvmtiThreadState.cpp`: > `JVM_VirtualThreadMountStart` => `VTMS_mount_begin` > `JVM_VirtualThreadMountEnd` => `VTMS_mount_end` > `JVM_VirtualThreadUnmountStart` = > `VTMS_unmount_begin` > `JVM_VirtualThreadUnmountEnd` => `VTMS_mount_end` > 3. Intrinsified the `VirtualThread` native methods: `notifyJvmtiMount`, > `notifyJvmtiUnmount`, `notifyJvmtiHideFrames`. > 4. Removed the`VirtualThread` static boolean state variable > `notifyJvmtiEvents` and its support in `javaClasses`. > 5. Added static boolean state variable `_VTMS_notify_jvmti_events` to the > jvmtiVTMSTransitionDisabler class as a replacement of the `VirtualThread` > `notifyJvmtiEvents` variable. > > Implementing the same methods as C1 intrinsics can be needed in the future > but is a low priority for now. > > Testing: > - Ran mach5 tiers 1-6. No regressions were found. This pull request has now been integrated. Changeset: bc0ed730 Author: Serguei Spitsyn <sspit...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/bc0ed730f2c9dad55d0046b4fe8c9cd623b6dbf8 Stats: 449 lines in 20 files changed: 276 ins; 125 del; 48 mod 8304303: implement VirtualThread class notifyJvmti methods as C2 intrinsics Reviewed-by: vlivanov, lmesnik ------------- PR: https://git.openjdk.org/jdk/pull/13054
