RFR: JDK-8294266: Add a way to pre-touch java thread stacks

[Andrew Haley]

On Sun, 13 Nov 2022 20:52:17 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> > Drive-by comment: there is `os::pretouch_memory(void* start, void* end, size_t page_size)` ;)
> 
> Good point. Had to cast the volatile away though.

Be careful with that. On some OSes, touching more than N pages below the currently lowest-mapped stack page will segfault. Therefore you must touch from the top down.

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PR: https://git.openjdk.org/jdk/pull/10403