RFR: 8325937: runtime/handshake/HandshakeDirectTest.java causes "monitor end should be strictly below the frame pointer" assertion failure on AArch64

[David Holmes]

On Wed, 2 Oct 2024 00:03:40 GMT, David Holmes <dholmes at openjdk.org> wrote:

> We need to check if Aarch64 has switched to using a relaxed-CAS that doesn't provide the "full bi-directional fence".

There is no CPU specific code in our Mutex implementation. `try_lock` simply delegates to ` pthread_mutex_trylock`.

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PR Comment: https://git.openjdk.org/jdk/pull/21295#issuecomment-2387301107