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
Changpeng.Fang at Sun.COM
Thu Oct 29 18:41:53 PDT 2009
Kevin developed a very nice small test case to expose the problem (many
-- it makes life much easier). I included it in the regression test
(webrev.01 is the update).
On 10/29/09 17:04, Changpeng Fang wrote:
> Was sent to the gc mailing list. Resend to the correct compiler list.
>> Note that I am requesting for change to the current jdk source (For
>> the SubCR)
>> 6852078: HSX 14/16 in jdk 5.0: api/javax_management api/org_omg 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
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