[jdk15u-dev] RFR: 8257746: Regression introduced with JDK-8250984 - memory might be null in some machines

[Ekaterina Vergizova]

I'd like to backport JDK-8257746 to 15u as follow-up fix for JDK-8250984 that is already included to 15u.
The patch applies cleanly.
Tested with tier1 and container tests.

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Commit messages:
 - Backport abc4300de9c7a298c359fb585d3b0570a98df5cb

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/54/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=54&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257746
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/54.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/54/head:pull/54

PR: https://git.openjdk.java.net/jdk15u-dev/pull/54