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  1. JDK
  2. JDK-8257701

Shenandoah: objArrayKlass metadata is not marked with chunked arrays

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      Description

        Usually, marking code calls Klass::oop_oop_iterate(), where it marks object klass metadata.

        Shenandoah introduced chunked array processing a while ago to breakup marking a large array into chunks, then call oop_iterate_range() to mark individual chunk. Unfortunately, oop_iterate_range() does not iterate over object klass metadata, which it should *not*, so we end up missing the mark of object array klass metadata.

        Thanks for [~lmao] reporting the bug.

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            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-8257840 Shenandoah: objArrayKlass metadata is not marked with chunked arrays

            • 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-8257842 Shenandoah: objArrayKlass metadata is not marked with chunked arrays

            • 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-8257869 Shenandoah: objArrayKlass metadata is not marked with chunked arrays

            • 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-8258021 Shenandoah: objArrayKlass metadata is not marked with chunked arrays

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

            Enhancement - null JDK-8129417 Oop iteration clean-up to remove oop_ms_follow_contents

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

            Commit Commit openjdk/jdk/7c7facc2

            Review Review openjdk/jdk/1602

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                zgu Zhengyu Gu
                zgu Zhengyu Gu
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                  Created:
                  Updated:
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