Request for Review (S) 6852078: HSX 14/16 in jdk 5.0: api/javax_management api/org_omg jck tests crashes or make tnameserv crash (original) (raw)

Changpeng Fang Changpeng.Fang at Sun.COM
Thu Oct 29 18:41:53 PDT 2009

http://cr.openjdk.java.net/~cfang/6852078/webrev.01/

Kevin developed a very nice small test case to expose the problem (many Thanks!! -- it makes life much easier). I included it in the regression test (webrev.01 is the update).

Thanks,

Changpeng

On 10/29/09 17:04, Changpeng Fang wrote:

Was sent to the gc mailing list. Resend to the correct compiler list. Thanks,

http://cr.openjdk.java.net/~cfang/6852078/webrev.00/

Note that I am requesting for change to the current jdk source (For the SubCR) 6852078: HSX 14/16 in jdk 5.0: api/javaxmanagement api/orgomg jck tests crashes or make tnameserv crash Problem: Current implementation of superword optimization does not check for unsafe memory accesses. Since unsafe memory accesses could not be aligned appropriately without runtime checking, a un-aligned superword read/write could cause runtime failure. Solution: Simply disable superword for unsafe memory access whose base is top. Tests: Test case in 6852078 Thanks, Changpeng

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