Request for Approval: Backport of 8181419: Race in jdwp invoker handling may lead to crashes or invalid results

[Severin Gehwolf]

Hi,

Please approve this backport for JDK-8181419, which is a stabilization
patch for JDK-8153711 a JDWP memory leak which is already in 8u152.

I've created a JDK 9 backport tracker bug since it's too late to get it
included now for JDK 9:
https://bugs.openjdk.java.net/browse/JDK-8186031

The patch is the same as for JDK 10 (post unshuffelling):
http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8181419/JDK-8181419.jdk8.export.patch

Original bug, review-request and webrev:

Bug: https://bugs.openjdk.java.net/browse/JDK-8181419
Review thread: http://mail.openjdk.java.net/pipermail/serviceability-dev/2017-June/021355.html
webrev: http://cr.openjdk.java.net/~stuefe/webrevs/8181419-Race-in-jdwp-invoker-handling-may-lead-to-crashes-or-invalid-results/webrev.00/webrev/

The fix got pushed to JDK 10 and there have been no issues found so
far. The JDK 8 patch builds fine for me and JDI tests do not show any
regressions.

Thanks,
Severin