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  1. JDK
  2. JDK-8275645

[JVMCI] avoid unaligned volatile reads on AArch64

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      Description

        The c2v_readFieldValue function uses HotSpot primitives for doing an unaligned volatile read of a short. This is not supported on AArch64. Instead, the function should unconditionally perform a volatile pre-read barrier (i.e., OrderAccess::acquire()) followed by a normal read.

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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-8280561 [JVMCI] avoid unaligned volatile reads on AArch64

            • P3 - Major loss of function.
            • 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-8281020 [JVMCI] avoid unaligned volatile reads on AArch64

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8309104 [JVMCI] compiler/unsafe/UnsafeGetStableArrayElement test asserts wrong values with Graal

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8275874 [JVMCI] only support aligned reads in c2v_readFieldValue

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk17u-dev/952f9c71

            Commit Commit openjdk/jdk/4dec8fc4

            Review Review openjdk/jdk17u-dev/130

            Review Review openjdk/jdk/6044

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                dnsimon Douglas Simon
                dnsimon Douglas Simon
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