Greetings, Please help review this change set that implements C2 intrinsics for jdk.internal.vm.Continuation.pin() and jdk.internal.vm.Continuation.unpin().
This work is a consequence of [JDK-8338417](https://bugs.openjdk.org/browse/JDK-8338417), which required us to introduce explicit pin constructs for VirtualThreads in a relatively performance-sensitive path. Testing: jdk_jfr, loom testing Comment: I changed the type of the ContinuationEntry::_pin_count field from uint to uin32_t to make the size explicit and to access it uniformly from the intrinsic code using T_INT. Thanks Markus ------------- Commit messages: - 8338745 Changes: https://git.openjdk.org/jdk/pull/20664/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20664&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8338745 Stats: 117 lines in 8 files changed: 113 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/20664.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20664/head:pull/20664 PR: https://git.openjdk.org/jdk/pull/20664
