[8u-backport] RFR: 8211909: JDWP Transport Listener: dt_socket thread crash

[Fairoz Matte]

Hi,

Kindly review the backport of  "8211909: JDWP Transport Listener: dt_socket thread crash" to 8u 

code is almost cleanly applied.

Webrev - http://cr.openjdk.java.net/~fmatte/8211909/webrev.00/ 

JBS bug - https://bugs.openjdk.java.net/browse/JDK-8211909 

JDK12 changeset - http://hg.openjdk.java.net/jdk/jdk/rev/a4d4c609d70c 

Review thread - http://mail.openjdk.java.net/pipermail/serviceability-dev/2018-October/025515.html 

Thanks,
Fairoz