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  1. JDK
  2. JDK-8295657

SA: Allow larger object alignments

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    • b21

    Backports

      Description

        Found this when working on JOL support (CODETOOLS-7903364). If you try to attach to VM running with -XX:ObjectAlignmentInBytes=32, then SA would fail with:

        ```
        Caused by: java.lang.RuntimeException: Object alignment 32 not yet supported
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.<init>(VM.java:510)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.initialize(VM.java:544)
        at jdk.hotspot.agent/sun.jvm.hotspot.HotSpotAgent.setupVM(HotSpotAgent.java:444)
        ```

        This code was added by JDK-6916623, but I don't see a reason why it should only handle 8 and 16 byte alignment.

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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-8310318 SA: Allow larger object alignments

            • 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-8311605 SA: Allow larger object alignments

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8295811 serviceability/sa/TestObjectAlignment.java fails on x86_32

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

            Commit Commit openjdk/jdk17u-dev/c6f6db2a

            Commit Commit openjdk/jdk/dfd2d831

            Review Review openjdk/jdk17u-dev/1457

            Review Review openjdk/jdk/10762

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                shade Aleksey Shipilev
                shade Aleksey Shipilev
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