.hgtags-top-repo
author ysr
Thu, 20 Nov 2008 12:27:41 -0800
changeset 1605 6b43d186eb8d
parent 1491 4e9ce4796705
child 1543 dea6bb74a45e
permissions -rw-r--r--
6722113: CMS: Incorrect overflow handling during precleaning of Reference lists Summary: When we encounter marking stack overflow during precleaning of Reference lists, we were using the overflow list mechanism, which can cause problems on account of mutating the mark word of the header because of conflicts with mutator accesses and updates of that field. Instead we should use the usual mechanism for overflow handling in concurrent phases, namely dirtying of the card on which the overflowed object lies. Since precleaning effectively does a form of discovered list processing, albeit with discovery enabled, we needed to adjust some code to be correct in the face of interleaved processing and discovery. Reviewed-by: apetrusenko, jcoomes

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