On Wed, 1 Jun 2022 06:04:14 GMT, Alan Bateman <al...@openjdk.org> wrote:
>> This patch adds an alternative virtual thread implementation where each >> virtual thread is backed by an OS thread. It doesn't scale but it can be >> used by ports that don't have continuations support in the VM. Aside from >> scalability, the lack of continuations support means: >> >> 1. JVM TI is not supported when running with --enable-preview (the JVM TI >> spec allows for this) >> 2. jshell --enable-preview can't be used (as jshell uses the debugger APIs >> and so needs JVM TI) >> >> The VM option "VMContinuations" is added as an experimental option so it can >> be used by tests. A number of tests are changed to re-run with >> -XX:-VMContinuations. A new jtreg property is added so that tests that need >> the underlying VM support to be present can use "@requires vm.continuations" >> in the test description. A follow-up change would be to add "@requires >> vm.continuations" to the ~70 serviceability/jvmti/vthread that run with >> preview features enabled. > > Alan Bateman has updated the pull request with a new target base due to a > merge or a rebase. The pull request now contains 11 commits: > > - Fixed another typo in comment > - Merge > - Fix typos in comments > - Allowing linking without intrinsic stub, contributed-by: rehn > - Continuation clinit should fail if no continuations support > - Fix merge issue with test > - Change VMContinuations to be experimental option, ensure JNI GetEnv > returns EVERSION > - Update > - Expend test coverage > - Merge > - ... and 1 more: > https://git.openjdk.java.net/jdk/compare/3deb58a8...a5c06cb6 src/java.base/share/classes/java/lang/Thread.java line 742: > 740: * @param name thread name, can be null > 741: * @param characteristics thread characteristics > 742: * @param bound true when bound to an OS thread Nit: s/OS/VM/ ? ------------- PR: https://git.openjdk.java.net/jdk/pull/8939
