RFR: 8353500: [s390x] Intrinsify Unsafe::setMemory [v4]

[Amit Kumar]

On Tue, 29 Apr 2025 14:44:43 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

> How is the behavior of mvc specified when hitting a signal (SIGSEGV or SIGBUS)? Will all Bytes before that place be written?

MVC is non interruptible instruction. So either it completes (without exception), or else it is suppressed or nullified (with exception).   In the latter case, no modification to memory is visible at all.

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PR Comment: https://git.openjdk.org/jdk/pull/24480#issuecomment-2846406211