[jdk11u-dev] RFR: 8231111: Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy [v7]

[Zhengyu Gu]

> This is a followup backport for Cgroup v2 support.
> 
> The original patch does not apply cleanly, due to context differences and some of out-of-order backports, conflicts were resolved manually.
> 
> In additional:
> 
> 1) Include partial backport of JDK-8250627.
>     - Renamed `Metrics.c` =>  `CgroupMetrics.c`
>     - Added native method `isUseContainerSupport()` to `CgroupMetrics.java`
>     - Return instance only if `isUseContainerSupport()` is enabled.
>    
> 2) Add `createTempDirectory()` method to `test/lib/jdk/test/lib/Utils.java` for `TestCgroupSubsystemController.java` test
> 
> 3) Add `import jdk.test.lib.process.OutputAnalyzer;` to `TestDockerMemoryMetrics.java`
> 
> Test:
> 
> - [x] jtreg containers/docker test on Ubuntu 20.04.4 LTS
> - [x] jdk/internal/platform/cgroup on Ubuntu 20.04.4 LTS
> - [x] jdk/internal/platform/docker on Ubuntu 20.04.4 LTS

Zhengyu Gu has updated the pull request incrementally with 50 additional commits since the last revision:

 - Merge branch 'master' into backport-8231111-unified-hierarchy
 - 8265343: Update Debian-based cross-compilation recipes
   
   Reviewed-by: stuefe
   Backport-of: 7879adbe88ec54b8f5ac9543d80142bc1b12112b
 - Merge
 - 8275703: System.loadLibrary fails on Big Sur for libraries hidden from filesystem
   
   Reviewed-by: mbaesken
   Backport-of: 6aa02d75d9f26f46fbdb54aef52cea3257aa7462
 - 8281615: Deadlock caused by jdwp agent
   
   Backport-of: e1060bee2adb9f2e07ca09309d0f89132db30f28
 - 8266251: compiler.inlining.InlineAccessors shouldn't do testing in driver VM
   
   Backport-of: 9605aeddee70ba4f3dba2ae2a3d100319164b03d
 - 8231565: More node budget asserts in fuzzed tests
   
   Backport-of: 902858e3ceb43bf92ea9fa038b9edcf1ee0c48b5
 - 8229499: Node budget assert in fuzzed test
   
   Reviewed-by: stuefe
   Backport-of: 8275b17b07b1c15bde79b36b76ecbe3072db1e1a
 - 8234605: C2 failed "assert(C->live_nodes() - live_at_begin <= 2 * _nodes_required) failed: Bad node estimate: actual = 208 >> request = 101"
   
   Backport-of: d19f2bdec01eb324d200f2144293d05ea310f9b8
 - 8246741: NetworkInterface/UniqueMacAddressesTest: mac address uniqueness test failed
   
   Reviewed-by: mdoerr
   Backport-of: f5d36e6c9470b1ac5326990b1c4fea80457c4ad6
 - ... and 40 more: https://git.openjdk.java.net/jdk11u-dev/compare/191fbe46...7d276fe6

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

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/863/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/863/files/191fbe46..7d276fe6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=863&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=863&range=05-06

  Stats: 7601 lines in 348 files changed: 3788 ins; 2721 del; 1092 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/863.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/863/head:pull/863

PR: https://git.openjdk.java.net/jdk11u-dev/pull/863