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  1. JDK
  2. JDK-8047818

G1 HeapRegions can no longer be ContiguousSpaces

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 9
    • 9
    • hotspot
    • gc
    • b24

    Backports

      Description

        When G1 is modified to unload classes without doing full collections the old HeapRegions
        can contain unparseable objects.
        This makes ContiguousSpace unsuitable as a base class for HeapRegion since it assumes that all objects below _top are parseable.

        Modify G1OffsetTableContigSpace to implement allocation with a separate _top and reimplement some Space pure virtuals to make object iteration work as expected.

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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-8049563 G1 HeapRegions can no longer be ContiguousSpaces

            • 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-8056642 G1 HeapRegions can no longer be ContiguousSpaces

            • 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-8063560 G1 HeapRegions can no longer be ContiguousSpaces

            • 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-8070840 G1 HeapRegions can no longer be ContiguousSpaces

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

            Enhancement - null JDK-8047819 G1 HeapRegionDCTOC does not need to inherit ContiguousSpaceDCTOC

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

            Enhancement - null JDK-8047820 G1 Block offset table does not need to support generic Space classes

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

            Enhancement - null JDK-8047821 G1 Does not use the save_marks functionality as intended

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

            Enhancement - null JDK-8048214 Linker error when compiling G1SATBCardTableModRefBS after include order changes

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

            Enhancement - null JDK-8048183 Unify allocation code in ContiguousSpace and G1OffsetTableContigSpace

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

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                mgerdin Mikael Gerdin (Inactive)
                mgerdin Mikael Gerdin (Inactive)
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                Dates

                  Created:
                  Updated:
                  Resolved: