This pr changes `JfrJvmtiAgent::retransform_classes()` and `jfr_set_enabled` to switch to `WXWrite` before transitioning to the vm.
Testing: make test TEST=jdk/jfr/event/runtime/TestClassLoadEvent.java TEST_VM_OPTS=-XX:+AssertWXAtThreadSync make test TEST=compiler/intrinsics/klass/CastNullCheckDroppingsTest.java TEST_VM_OPTS=-XX:+AssertWXAtThreadSync More tests are pending. ------------- Commit messages: - Switch to WXWrite before entering the vm Changes: https://git.openjdk.org/jdk/pull/18238/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18238&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8327990 Stats: 5 lines in 2 files changed: 4 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/18238.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18238/head:pull/18238 PR: https://git.openjdk.org/jdk/pull/18238
