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  1. JDK
  2. JDK-8015270

@Contended: fix multiple issues in the layout code

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      b35

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        This is the umbrella issue for various @Contended touchups.

        The issues arguably manifest in the VM crashes/corruptions when specially-crafted @Contended classes are available. See linked issues for the observed failure modes.

        The more concrete failures are only happening on new hotspot/test/runtime/contended/{HasNonStatic,OopMaps} regression tests *with* the new asserts. This opens up the way to test the fix: revert the change, put the asserts back in, and watch the ClassFileParser::layout_fields asserts fire on fastdebug build.

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                Assignee:
                shade Aleksey Shipilev
                Reporter:
                shade Aleksey Shipilev
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