RFR: 8342409: [s390x] C1 unwind_handler fails to unlock synchronized methods with LM_MONITOR

[Amit Kumar]

On Thu, 17 Oct 2024 06:38:57 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

> Make sure LIR_Assembler::emit_unwind_handler() jumps to the slow path directly for unlocking a synchronized method if LM_MONITOR is used.
> On the fast paths assertions are added that the mode is actually handled.
> 
> Testing: Tier1 test for fastdebug vm showed no regression.

@RealLucy can I get another approval for this :-)

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PR Comment: https://git.openjdk.org/jdk/pull/21557#issuecomment-2421285274