> In the virtual thread implementation, thread identity switches to the carrier > before freezing and switches back to the virtual thread after thawing. This > was a forced move due to issues getting JVMTI to work with virtual threads. > JVMTI can now hide events during transitions so we can invert the sequence > back to mounting before running the continuation, unmounting after freezing, > and re-mounting after thawing. This sequence is important for future changes > that will initiate the freezing from the VM. > > The change requires an update to the JFR thread sampler to skip sampling when > it samples during a transition. > > Testing: tier1-5
Alan Bateman has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision: - Move transition check to JfrVframeStream ctor - Merge - Check for transition during stack walk for synchronous case - Merge - Initial commit ------------- Changes: - all: https://git.openjdk.org/jdk/pull/15492/files - new: https://git.openjdk.org/jdk/pull/15492/files/18f63cbd..507ae919 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=15492&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15492&range=01-02 Stats: 6688 lines in 179 files changed: 5237 ins; 969 del; 482 mod Patch: https://git.openjdk.org/jdk/pull/15492.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15492/head:pull/15492 PR: https://git.openjdk.org/jdk/pull/15492
