8349988: Change cgroup version detection logic to not depend on /proc/cgroups

[jmtd]

Note: this adapts the 11u backport which (at the time of writing) is not yet approved.

This is a backport of an improvement to cgroup detection logic. This fixes mis-detection on some systems e.g. Debian and Ubuntu systems, or systems running a recent enough mainline kernel which no longer propagates the older /proc/cgroups file with necessary controllers.

This wasn't clean: there are a few C++ changes (nullptr to NULL substitutions, os namespacing on cstd functions); logging mechanism changes; removal of PID controller related stuff.

Cherry-picking note: for reasons unknown git failed to apply the hunks for whitebox.cpp so I did those manually. It also patched the wrong copy of WhiteBox.java. I'm hoping we can pick up JDK-8327993 which should resolve this for future cgroups backports.

The modified CgroupSubsystemFactory.java passes.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8347811 needs maintainer approval
• JDK-8349988 needs maintainer approval

Issues

• JDK-8349988: Change cgroup version detection logic to not depend on /proc/cgroups (Sub-task - P3)
• JDK-8347811: Container detection code for cgroups v2 should use cgroup.controllers (Enhancement - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u-dev.git pull/779/head:pull/779
$ git checkout pull/779

Update a local copy of the PR:
$ git checkout pull/779
$ git pull https://git.openjdk.org/jdk8u-dev.git pull/779/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 779

View PR using the GUI difftool:
$ git pr show -t 779

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk8u-dev/pull/779.diff

[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

⚠️ @jmtd the commit 59c7c8ed4b3392d3c8ee26128aaa71d10f46a595 does not refer to an issue in project JDK.

[openjdk]

This backport pull request has now been updated with issues from the original commit.

[jmtd]

# newfailures.txt
security/infra/java/security/cert/CertPathValidator/certification/CAInterop.java#digicerttlseccrootg5 
security/infra/java/security/cert/CertPathValidator/certification/CAInterop.java#digicerttlsrsarootg5 
security/infra/java/security/cert/CertPathValidator/certification/CAInterop.java#quovadisrootca1g3 
security/infra/java/security/cert/CertPathValidator/certification/CAInterop.java#quovadisrootca2g3 
security/infra/java/security/cert/CertPathValidator/certification/CAInterop.java#quovadisrootca3g3 
security/infra/java/security/cert/CertPathValidator/certification/CAInterop.java#teliarootcav2 

gut feeling is these will be unrelated but I will investigate further.

[jmtd]

reproduced those failures locally. now trying the master branch. Edit: yes same failures