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  1. JDK
  2. JDK-8264199

[macos_aarch64] Support macOS Aarch64 packed ABI for compiled wrappers

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Details

    • Enhancement
    • Status: Open
    • P3
    • Resolution: Unresolved
    • 17, 18
    • tbd
    • hotspot
    • aarch64
    • os_x

    Description

      This is RFE after JEP-391.
      We have marked JDK-8253818 as resolved by JEP-391 but in fact only the workaround (to bailout to interp in problematic cases) was implemented.
      Macos_aarch64 uses packed types when they are passed on stack.
      For example uint32 will use only 4 bytes on stack, not 8. Byte will only use 1 byte on stack. Natural type allignment still in place.
      More on the macos_aarch64 abi ( matches ios_aarch64 abi) - https://developer.apple.com/documentation/xcode/writing_arm64_code_for_apple_platforms#//apple_ref/doc/uid/TP40009020-SW1

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          is blocked by

          Enhancement - null JDK-8283462 VMReg should encode stack locations as byte offsets instead of slots

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

          JEP - Java Enhancement Proposal JDK-8251280 JEP 391: macOS/AArch64 Port

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

          Sub-task - The sub-task of the issue JDK-8253818 Support macOS Aarch64 ABI for compiled wrappers

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

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              Unassigned Unassigned
              vkempik Vladimir Kempik
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              Dates

                Created:
                Updated: