This is needed for performance improvements in 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.
-------------
Commit messages:
- fix traling spaces in a couple of files
- minor update for VTMS_notify_jvmti_events variable
- 8304303: implement VirtualThread class notifyJvmti methods as C2 intrinsics
Changes: https://git.openjdk.org/jdk/pull/13054/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13054&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8304303
Stats: 438 lines in 20 files changed: 265 ins; 125 del; 48 mod
Patch: https://git.openjdk.org/jdk/pull/13054.diff
Fetch: git fetch https://git.openjdk.org/jdk pull/13054/head:pull/13054
PR: https://git.openjdk.org/jdk/pull/13054
