[jdk11u-dev] RFR: 8234930: Use MAP_JIT when allocating pages for code cache on macOS [v2]

[Vladimir Kempik]

> Please review this backport of JDK-8234930 to jdk11u-dev.
> This is a prerequest for mac-aarch64
> It's not applying clean due to the miss of these two patches
> JDK-8253639: Change os::attempt_reserve_memory_at parameter order
> JDK-8253650: Cleanup: remove alignment_hint parameter from os::reserve_memory
> But they aren't critical and the patch can easily be modified

Vladimir Kempik has updated the pull request incrementally with one additional commit since the last revision:

  Fix up windows

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/580/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/580/files/9cd6526b..ca102537

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=580&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=580&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/580.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/580/head:pull/580

PR: https://git.openjdk.java.net/jdk11u-dev/pull/580