RFR: 8267235: [macos_aarch64] InterpreterRuntime::throw_pending_exception messing up LR results in crash [v2]

[Andrew Haley]

On Thu, 20 May 2021 15:19:22 GMT, Vladimir Kempik <vkempik at openjdk.org> wrote:

>> Please review this patch for call_VM_Base routine.
>> it's expected there the LR is callee-saved register, but it's not on aarch64.
>> when InterpreterRuntime::throw_pending_exception is tail-call optimized,
>> the last subroutine before return is pthread_jit_write_protect_np which pac-sign LR.
>> It can only be reproduced in macos 11.4beta (just run J2Ddemo ) but in fact affects every aarch64 build.
>
> Vladimir Kempik has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update the fix

Marked as reviewed by aph (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/4115