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  1. JDK
  2. JDK-8253525

Implement getInstanceSize/sizeOf intrinsics

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Details

    • Enhancement
    • Status: Resolved
    • P4
    • Resolution: Fixed
    • 16
    • 16
    • hotspot
    • b25

    Description

      This is fork off the SizeOf JEP, JDK-8249196. There is already the entry point in JDK that can use the intrinsic like this: Instrumentation.getInstanceSize. Therefore, we can implement the C1/C2 intrinsic now, hook it up to Instrumentation, and let the tools use that fast path today.

      Work is done here:
        https://github.com/openjdk/jdk/pull/650

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8280003 C1: Reconsider uses of logical_and immediates in LIRGenerator::do_getObjectSize

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8279301 c1 getObjectSize intrinsic should guard round mask constant

          • P3 - Major loss of function.
          • Closed

          JEP - Java Enhancement Proposal JDK-8249196 Low-level Object layout introspection methods

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

          Commit Commit openjdk/jdk/b4d01867

          Review Review openjdk/jdk/650

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              shade Aleksey Shipilev
              shade Aleksey Shipilev
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                Created:
                Updated:
                Resolved: