RFR: 8194653: Deadlock involving FileSystems.getDefault and System.loadLibrary call

[Andrew Dinn]

Could I please have reviews for the following patch against jdk8u-dev:

  Webrev: http://cr.openjdk.java.net/~adinn/8194653/webrev.00/
  JIRA:   https://bugs.openjdk.java.net/browse/JDK-8194653

Background:

The email threads discussing this issue were a tad inconclusive for both
jdk8u and jdk9+.

On jdk8 a suggestion was left hanging that a fix in the jdk not jvm
might be better.

On jdk9+ upwards the deadlock does not manifest but it might do in
future so an investigation was requested by Alan Bateman which has not
been followed up.

Nevertheless, Oracle have applied a jdk8u patch in 8u212, although using
a different JIRA issue.

  https://bugs.openjdk.java.net/browse/JDK-8222858

I am not sure why this has been done as a backport? Note it may be
relevant that the original JIRA (8194653) is marked as being against 8u231.

Testing:

The reproduced supplied with the original patch and included in the
above webrev fails before applying and works afterwards.

regards,


Andrew Dinn
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