Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8155635

C2: Mixed unsafe oop accesses break alias analysis

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P1 P1
    • 9
    • 9
    • 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

              vlivanov Vladimir Ivanov
              vlivanov Vladimir Ivanov
              Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

                Created:
                Updated:
                Resolved: