[jdk17u-dev] RFR: 8226919: attach in linux hangs due to permission denied accessing /proc/pid/root

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Commit messages:
 - Backport ac4607ed81eb75f43e7d1062e38506972738d086

Changes: https://git.openjdk.org/jdk17u-dev/pull/3692/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3692&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8226919
  Stats: 36 lines in 1 file changed: 21 ins; 11 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3692.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3692/head:pull/3692

PR: https://git.openjdk.org/jdk17u-dev/pull/3692