RFR: 8159890: SIGSEGV with UseStringDeduplication and UseSharedSpaces/RequireSharedSpaces

[Per Liden]

Hi,

Summary: This was bug was introduced by JDK-8150607 - Clean up 
CompactHashtable, where the rewrite of CompactHashtable::oops_do() by 
mistake now iterates over entry[0] instead of entry[1] for regular 
bucket types. This causes garbage (non-narrowOop) values to be passed to 
the OopClosure passed to oops_do() and we crash. The bug is easy to 
reproduce with:

$ java -Xshare:dump
$ java -XX:+UseSharedSpaces -XX:+UseStringDeduplication -version

Webrev: http://cr.openjdk.java.net/~pliden/8159890/webrev.0/
Bug: https://bugs.openjdk.java.net/browse/JDK-8159890

cheers,
Per