[jdk19u] RFR: 8295264: Fix PaX check on RISC-V

[Ludovic Henry]

On Wed, 23 Nov 2022 20:49:58 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

> On Linux RISC-V, PROT_WRITE doesn't imply PROT_READ [1]
> 
> The fix is to pass PROT_READ|PROT_WRITE. That matches all other calls to mmap in hotspot.
> 
> [1] https://lkml.org/lkml/2022/9/8/1066

IIUC I should wait on the label `jdk19-fix-yes` on https://bugs.openjdk.org/browse/JDK-8295264 before integrating, correct?

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PR: https://git.openjdk.org/jdk19u/pull/91