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  1. JDK
  2. JDK-8258714

Shenandoah: Process references before evacuation during degen

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    • gc
    • b30
    • generic
    • generic

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      Description

        Currently, when doing degen-cycle, we process references right before immediate-garbage cleanup. It is imperative that we process references before any immediate garbage gets recycled, or else we may end up with bad references during reference-processing. However, the trouble is that immediate garbage can be recycled even before cleanup phase by recycle-assist. For this reason, we must process references before any evacuation during degen GC. It is also more natural: we process refs before weak roots and class-unloading during concurrent cycle, and should do the same during degen cycle.
        (Note that we already prevent recycle-assist in concurrent phase)

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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-8258841 Shenandoah: Process references before evacuation during degen

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8260067 Shenandoah: Process references before evacuation during degen

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved
            duplicates

            Bug - A problem which impairs or prevents the functions of the product. JDK-8258145 Shenandoah: TestGCBasherWithShenandoah crash during concurrent mark

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Enhancement - null JDK-8254315 Shenandoah: Concurrent weak reference processing

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

            Commit Commit openjdk/jdk16/2525f39d

            Review Review openjdk/jdk16/55

            Review Review openjdk/jdk/1859

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                rkennke Roman Kennke
                rkennke Roman Kennke
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                  Updated:
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