RFR 8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace:,:contains (original) (raw)

Coleen Phillmore coleen.phillimore at oracle.com
Thu Jan 2 09:25:25 PST 2014

Summary: Metaspace::contains cannot look at purged metaspaces while CMS concurrently deallocates them.

Removed 2 calls to is_metaspace_object where the object may be in a deallocated metaspace. Removed walking virtual space lists for determining contains because the virtual space list can change concurrently with the walk. CLDG::contains is slower but no slowdowns with testing were observed.

Tested by SQE testbase tests, jtreg tests. Functional testing by parallel class loading tests and nsk/coverage/arguments/arguments008 (ie. calls Method::is_valid_method)

open webrev at http://cr.openjdk.java.net/~coleenp/8029178/ bug link https://bugs.openjdk.java.net/browse/JDK-8029178

Thanks, Coleen

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