RFR: 8368781: PerfMemory - make issues more transparent

Thu Oct 2 08:33:53 UTC 2025

Currently issues with perfMemory like problems with the secure tmp subdirectory creation are not very transparent in release JVMs.

There exists some warnings traces but they are behind develop flags like Verbose so only available in debug JVMs.
We could (in case of issues) store some information and write it later into hsinfo/hserr files ; or make the existing warnings available too in release JVMs.

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Commit messages:
 - JDK-8368781

Changes: https://git.openjdk.org/jdk/pull/27602/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27602&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368781
  Stats: 67 lines in 4 files changed: 3 ins; 0 del; 64 mod
  Patch: https://git.openjdk.org/jdk/pull/27602.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27602/head:pull/27602

PR: https://git.openjdk.org/jdk/pull/27602