RFR: 8309751: Duplicate constant pool entries added during default method processing [v2]

[David Holmes]

On Tue, 2 Apr 2024 22:07:15 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Value is essentially (uintptr_t)utf8, or (uintptr_t)u2klass|u4name_and_type, or (uintptr_t)u2klass|u4methodref;  ie the value of the fields that are in the union.
>
> Look at equals:
> 
>   static bool equals(BytecodeCPEntry const& e0, BytecodeCPEntry const& e1) {
>     return e0._tag == e1._tag && e0._u.value == e1._u.value;
>   }

That is technically undefined behaviour.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18548#discussion_r1550911746