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  1. JDK
  2. JDK-8202604

Use object pinning to avoid array copying in JNI_GetxxxArrayElements/GetStringxxx

    Details

    • Type: Enhancement
    • Status: Closed
    • Priority: P4
    • Resolution: Won't Fix
    • Affects Version/s: 11
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Labels:
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      Description

      During JDK-8199868 code review:

      Ian Rogers wrote:

      Re JDK-8199868 - should pinning be limited to just critical APIs? The non-critical variants could also pin to avoid copies.
      I see this as related to JDK-8199919. It'd be nice to just move the critical APIs to use the same logic as the non-critical APIs, then pinning just becomes a performance optimization to avoid copying. Re JDK-8199919's comment that there is no deprecation mechanism, compilers like GCC allow function attributes that warn when a deprecated function is used.

      Thanks,
      Ian

      http://mail.openjdk.java.net/pipermail/hotspot-dev/2018-May/032030.html

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              • Assignee:
                Unassigned
                Reporter:
                zgu Zhengyu Gu
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                • Created:
                  Updated:
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