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  1. JDK
  2. JDK-8245596

Clarify Lookup::defineHiddenClass spec @throws IAE if the bytes has ACC_MODULE flag set


    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 15
    • Component/s: core-libs
    • Labels:


      Tested method: MethodHandles.Lookup defineHiddenClass
      List of assertions:
      1. Creates a hidden class or interface C from bytes, returning a Lookup on the newly created class or interface.

      C is derived with name CN, class loader L, and purported representation newBytes as if by the rules of JVMS 5.3.5..:

      JVMS 5.3.5:
      2. Otherwise, the Java Virtual Machine attempts to parse the purported representation. However, the purported representation may not in fact be a valid representation of C.

      This phase of loading must detect the following errors:

       Otherwise, if the purported representation does not actually represent a class named N, loading throws an instance of NoClassDefFoundError or an instance of one of its subclasses.

      This occurs when the purported representation ... has an access_flags item which has the ACC_MODULE flag set.

      The implementation throws IllegalArgumentException although NoClassDefFoundError is expected.

      The API spec does not state behavior in the case when ACC_MODULE is set in an array of bytes presenting a class File, thus the implementation should follow JVMS 5.3.5 and throws NoClassDefFoundError


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              • Assignee:
                mchung Mandy Chung
                lkuskov Leonid Kuskov
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