Check if instanceDescription is an immediate value in loop #15713
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There is a case where the number of object slots are greater than the number of bits in a word and `instanceDescription` is used as an immediate value instead of a pointer, such as when the class doesn't have any references. We need to break the loop in this case before `instanceDescription` is dereferenced as a pointer. Signed-off-by: Annabelle Huo <Annabelle.Huo@ibm.com>
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a7ehuo
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Brad @BradleyWood, may I ask you to review this pull request as well? |
a7ehuo
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tajila
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Aug 18, 2022
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LGTM |
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Jenkins test sanity,extended xlinuxval jdknext |
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Jenkins test sanity all jdk17 |
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There is a case where the number of object slots are greater than the number of bits in a word and
instanceDescriptionis used as an immediate value instead of a pointer, such as when the class doesn't have any references. We need to break the loop in this case beforeinstanceDescriptionis dereferenced as a pointer.This fixes
openj9-jit-xopt/issues/529Thanks to Henry @hzongaro for tracking down the issue to hasReferneces change #10651
Signed-off-by: Annabelle Huo Annabelle.Huo@ibm.com