[8u] RFR for JDK-8158373: SIGSEGV: Metadata::mark_on_stack

[Shafi Ahmad]

Hi ,

Please review the code change for "JDK-8158373: SIGSEGV: Metadata::mark_on_stack" to jdk8u.

Summary:
In jdk8, MetadataOnStackMark is run in clean_metaspaces() rather than in ClassLoaderDataGraph::do_unloading(), so calling free_deallocate_list() without first marking is not safe.
Current code change move the call of free_deallocate_list() inside function free_deallocate_lists() which is called from clean_metaspaces().

Jdk8 Bug: https://bugs.openjdk.java.net/browse/JDK-8158373
Webrev link: http://cr.openjdk.java.net/~shshahma/8158373/webrev.00/

Testing: jprt and failed tests

Regards,
Shafi