[jdk21u-dev] RFR: 8327036: [macosx-aarch64] SIGBUS in MarkActivationClosure::do_code_blob reached from Unsafe_CopySwapMemory0

[Richard Reingruber]

On Fri, 1 Mar 2024 08:33:58 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> So that adds a WX transition to every JVM_ENTRY_FROM_LEAF? I think we need to think about the cost of that. Isn't it better to do the transition when we actually need it?

There are no usages of JVM_ENTRY_FROM_LEAF where the WX transition already happened. So I think it is safest to add it to JVM_ENTRY_FROM_LEAF.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/305#issuecomment-1972771033