RFR: 8327990: [macosx-aarch64] Various tests fail with -XX:+AssertWXAtThreadSync [v3]

[David Holmes]

On Mon, 18 Mar 2024 13:14:41 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

>> 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.
>
> Richard Reingruber 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 three additional commits since the last revision:
> 
>  - Merge branch 'master' into 8327990_jfr_enters_vm_without_wxwrite
>  - Set WXWrite at more locations
>  - Switch to WXWrite before entering the vm

Not ideal but it fixes a real problem.

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18238#pullrequestreview-1947550278