Now the `JvmtiVTMSTransitionDisabler` mechanism supports disabling VTMS transitions for all virtual threads only. It should also support disabling transitions for any specific virtual thread as well. This will improve scalability of the JVMTI functions operating on target virtual threads as the functions can be executed concurrently without blocking each other execution when target virtual threads are different. New constructor `JvmtiVTMSTransitionDisabler(jthread vthread)` is added which has jthread parameter of the target virtual thread.
Testing: mach5 jobs are TBD: - all JVMTI, JDWP, JDI and JDB tests have to be run - Kitchensink - tier5 ------------- Commit messages: - fix trailing white spaces in javaClasses.cpp and jvmtiThreadState.cpp - 8298853: JvmtiVTMSTransitionDisabler should support disabling one virtual thread transitions Changes: https://git.openjdk.org/jdk/pull/11690/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11690&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8298853 Stats: 161 lines in 7 files changed: 110 ins; 2 del; 49 mod Patch: https://git.openjdk.org/jdk/pull/11690.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11690/head:pull/11690 PR: https://git.openjdk.org/jdk/pull/11690
