The change fixes several issues with capability management: - handling can_support_virtual_threads capability. JvmtiExport::can_support_virtual_threads() should be set to true if we have one or more agent with can_support_virtual_threads capability; - JvmtiManageCapabilities (used by GetPotentialCapabilities/AddCapabilities/RelinquishCapabilities/GetCapabilities) is not thread safe; - SuspendAllVirtualThreads and ResumeAllVirtualThreads should check capability on the caller agent (and not JvmtiExport::can_support_virtual_threads()).
Testing: tier1..5 ------------- Commit messages: - capabilities for VT Changes: https://git.openjdk.org/jdk/pull/15219/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15219&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8313656 Stats: 53 lines in 3 files changed: 47 ins; 0 del; 6 mod Patch: https://git.openjdk.org/jdk/pull/15219.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15219/head:pull/15219 PR: https://git.openjdk.org/jdk/pull/15219
