C2: Mixed unsafe oop accesses break alias analysis

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    • Type: Bug
    • Resolution: Fixed
    • Priority: P1
    • 9
    • Affects Version/s: 9
    • Component/s: hotspot
    • b137
    • Verified

        Unsafe accesses can produce untyped pointers:

        # Internal Error (/Users/vlivanov/ws/jdk/hs-comp9/hotspot/src/share/vm/opto/compile.cpp:1712), pid=61943, tid=22531
        # assert(flat != TypePtr::BOTTOM) failed: cannot alias-analyze an untyped ptr

        ILW = MLH = P4
        I = M: assert
        L = L: observed only with modified JVM
        W = H: no workaround

          1. hs_err_pid61987.log
            64 kB
            Vladimir Ivanov
          2. SplitIf.AddPNode.png
            44 kB
            Vladimir Ivanov

              Assignee:
              Vladimir Ivanov
              Reporter:
              Vladimir Ivanov
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                Created:
                Updated:
                Resolved: