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  1. JDK
  2. JDK-8035326

Assume non-NULL references in G1CollectedHeap::in_cset_fast_test

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    • Enhancement
    • Resolution: Fixed
    • P4
    • 9
    • 8u20, 9
    • hotspot
    • gc
    • b04
    • x86

    Backports

      Description

        All but one invocations of G1CollectedHeap::in_cset_fast_test already assume or make sure that the referenced object is within the heap (since the perm gen removal).

        This additional check is superfluous, and decreases performance.

        Change G1CollectedHeap::in_cset_fast_test to not assume that the passed references are NULL references.

        The only place where NULL references were possible, is G1ParCopyClosure::do_oop_work(). However extracting the check out allows further code simplifications.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8035642 Assume non-NULL references in G1CollectedHeap::in_cset_fast_test

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8045234 Assume non-NULL references in G1CollectedHeap::in_cset_fast_test

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8053238 Assume non-NULL references in G1CollectedHeap::in_cset_fast_test

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            duplicates

            Enhancement - null JDK-8027554 Implicit in-heap check in G1CollectedHeap::in_cset_fast_test() not always required

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed
            relates to

            Enhancement - null JDK-8035400 Move G1ParScanThreadState into its own files

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

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                tschatzl Thomas Schatzl
                tschatzl Thomas Schatzl
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                  Created:
                  Updated:
                  Resolved: