Currently, javap crashes for class files that have set non-zero values for undefined access flag bits, as `java.lang.reflect.AccessFlag.maskToAccessFlag` and `java.lang.classfile.AccessFlags.flags` fail. In contrast, the JVMS, though asking for these bits to be set to 0, requires VM to proceed and ignore these bits. javap should emulate the VM behavior and proceed rendering, ignoring these undefined bits.
In addition, a few bytecode generation utilities in the JDK set unused bits, such as in `java.lang.invoke.MethodHandleImpl.BindCaller#generateInvokerTemplate` and `java.lang.invoke.GenerateJLIClassesHelper#generateCodeBytesForLFs`. Those can be updated in a later cleanup. ------------- Commit messages: - 8333748: javap crash - Fatal error: Unmatched bit position 0x2 for location CLASS Changes: https://git.openjdk.org/jdk/pull/19708/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19708&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8333748 Stats: 156 lines in 3 files changed: 104 ins; 21 del; 31 mod Patch: https://git.openjdk.org/jdk/pull/19708.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19708/head:pull/19708 PR: https://git.openjdk.org/jdk/pull/19708
