[7u-dev] request for approval 8000456, Add programmatic deadlock detection in SSLEngineDeadlock

[Xuelei Fan]

Hi,

This is a request to backport a JDK 8 fix into JDK 7u-dev:
    8000456: Add programmatic deadlock detection in SSLEngineDeadlock

The fix has already been pushed to JDK 8:
    http://hg.openjdk.java.net/jdk8/tl/jdk/rev/2d9da733014f

The code changes for jdk7u are identical to the ones in jdk8. The fix
only makes update in regression test case. It is simple and no expected
risks.

This fix is an effort to make the regression test more stable. The test
case SSLEngineDeadlock.java is used to detect the deadlock in SSLEngine.
 However, the result depends on time out.  It is hard to tell
whether the timeout is caused by deadlock or heavy loaded systems.

In this update, programmatic deadlock detection is introduced. This
update should make it a little easy to identify deadlock from various
timeout causes.

Thanks,
Xuelei