RFR(S): 8192825: PPC64: Missing null check in C1 inline cache check

Doerr, Martin martin.doerr at sap.com
Thu Nov 30 17:17:20 UTC 2017


I found a problem on AIX which is cause by a missing null check.

Compiled methods need to perform a null check in the unverified entry. This is usually done implicitly by loading the Klass*.
However, implicit null checks may be off on PPC64 (especially on AIX where the 0 page is readable).

Null checks are especially needed after:
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
Summary: C1 must use unverified entry point for unloaded methods.

Webrev is here:

Please review.

Best regards,

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