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  1. JDK
  2. JDK-8225113

Shenandoah: Implement oop_store_not_in_heap barrier

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    • gc

    Description

      Since Shenandoah switched to LRB and strong to-space invariant, it is expected to store only to-space oops.

      Ideally, it is enforced by LRB to ensure that only to-space oops in system. Unfortunately, there are some naked loads, e.g. Universe::null_ptr_exception_instance(), etc. that bypasses barrier. These loads can result from-space oops and subsequently be stored in roots.
      oop_store_not_in_heap should be able to intercept those stores and resolve them to to-space oops.

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              zgu Zhengyu Gu
              zgu Zhengyu Gu
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