[jdk8u-dev] RFR: 8252359: HotSpot Not Identifying it is Running in a Container [v4]

[Jonathan Dowland]

> This is a clean backport of 8252359  to jdk8u-dev, as part of cgroups v2 support.

Jonathan Dowland has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 14 commits:

 - 8252359: HotSpot Not Identifying it is Running in a Container
   
   Backport-of: 76f0588aaf265439a589cceb924e3ea9d3fda8f1
 - replace log_trace with tty->print_cr
 - 8278951: containers/cgroup/PlainRead.java fails on Ubuntu 21.10
   
   Reviewed-by: sgehwolf
   Backport-of: 35172cdaf38d83cd3ed57a5436bf985dde2d802b
 - PlainRead: ProcessBuilder: jdk8u-appropriate command line flags
 - adjust jtreg settings and imports for 8u
 - 8197408: Bad pointer comparison and small cleanup in os_linux.cpp
   
   Reviewed-by: bobv, stuefe
 - Test fix by Severin. Thanks!
 - replace post-jdk8u Optional.isEmpty
 - 8239559: Cgroups: Incorrect detection logic on some systems
   
   Adjust heuristic with cgroup mounts according to mountinfo
   
   Backport-of: 53ee0c4963007b86db7979312b81f990e6ce271a
 - 8240189: [TESTBUG] Some cgroup tests are failing after JDK-8231111
   
   Reviewed-by: mdoerr
   Backport-of: c92adf41587767e9c5c8e116cfaeb375d36928aa
 - ... and 4 more: https://git.openjdk.org/jdk8u-dev/compare/e4a44241...34b0259f

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Changes: https://git.openjdk.org/jdk8u-dev/pull/157/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=157&range=03
  Stats: 645 lines in 18 files changed: 477 ins; 53 del; 115 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/157.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/157/head:pull/157

PR: https://git.openjdk.org/jdk8u-dev/pull/157