[jdk8u-dev] RFR: 8237479: 8230305 causes slowdebug build failure [v5]

[Jonathan Dowland]

> This is a backport of 8237479 to jdk8u-dev, as part of cgroups v2 support. It deepnds on 8230305 (pr/127) and I've set up the GitHub PR accordingly.
> 
> Apart from path shuffling, it applies clean.

Jonathan Dowland has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 24 commits:

 - 8237479: 8230305 causes slowdebug build failure
   
   Declare methods as pure virtual.
   
   Backport-of: 4ca06995855b5c974321d7b3622d661b8d27ba76
 - 8253714: [cgroups v2] Soft memory limit incorrectly using memory.high
   
   The early implementation of cgroups v2 support was done with
   crun 0.8 and it contained a bug which set memory.high over
   memory.low when --memory-reservation was being used as a CLI
   option.
   
   This bug has been fixed in later crun versions, starting with
   crun 0.11. Use memory.low in OpenJDK as well.
   
   Backport-of: ff6843ca4842498791061f924c545fa9469cc1dc
 - Address style nit
 - TestCgroupSubsystemController: rework use of Files.writeString
 - CgroupSubsystemController: fix library paths
   
   We need the testlibrary copy of FileUtils but the test.lib.util copy of
   Utils (method createTempDirectory is missing from the testlib copy)
 - TestCgroupSubsystemController: fix jtreg @library path
 - Replace Arrays.compare with Arrays.equals
   
   jdk8u does not have Arrays.compare()
 - incorporate (part of) 8275713: TestDockerMemoryMetrics test fails on recent runc
   
   The main hunk from 8275713 was rolled up in the changes for 8231111.
   This line is also necessary.
 - update mapfile for new JNI method name
 - tests for the backport
   
   two files had fairly significant merge conflicts, eyeball only to resolve
   
   haven't run any of them yet -- will depend on the rest of the patch
 - ... and 14 more: https://git.openjdk.org/jdk8u-dev/compare/f04ad96c...463f7511

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

Changes: https://git.openjdk.org/jdk8u-dev/pull/128/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=128&range=04
  Stats: 7429 lines in 43 files changed: 5082 ins; 2178 del; 169 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/128.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/128/head:pull/128

PR: https://git.openjdk.org/jdk8u-dev/pull/128