RFR: 8319795: Static huge pages are not used for CodeCache [v2]

[Evgeny Astigeevich]

> This is a fix of a regression introduced by [JDK-8261894](https://bugs.openjdk.org/browse/JDK-8261894).
> After JDK-8261894, `os::can_execute_large_page_memory()` returns `true` only if `UseTransparentHugePages` is true. As CodeCache uses `os::can_execute_large_page_memory()` when it detects a page size, CodeCache cannot use static huge pages (`UseTransparentHugePages` is `false`) anymore after the change.
> Before JDK-8261894, `os::can_execute_large_page_memory()` returned `true`  when either `UseTransparentHugePages` or `UseHugeTLBFS` was true.
> 
> After JDK-8261894, `XX:+UseLargePages XX:-UseTransparentHugePages` means to use static huge pages: aka `UseHugeTLBFS` is `true`. If `UseLargePages` is not set to `true` via the option, it will be set to `true` if `UseTransparentHugePages` is `true`.
> 
> `os::can_execute_large_page_memory()` is modified to return `UseLargePages`. A regression gtest  is added.
> 
> Tested fastdebug and release builds:
> - [x] tier1
> - [x] gtest
> - [x] test/hotspot/jtreg/gtest/LargePageGtests.java

Evgeny Astigeevich has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Refactor CodeCache init code for better support of different memory page sizes
 - Merge branch 'master' into JDK-8319795
 - Remove os::can_execute_large_page_memory
 - 8319795: Static huge pages are not used for CodeCache

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16582/files
  - new: https://git.openjdk.org/jdk/pull/16582/files/d1bdfdfd..5416895d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16582&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16582&range=00-01

  Stats: 632439 lines in 1604 files changed: 95377 ins; 472746 del; 64316 mod
  Patch: https://git.openjdk.org/jdk/pull/16582.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16582/head:pull/16582

PR: https://git.openjdk.org/jdk/pull/16582