RFR: 8334772: Change Class::signers to an explicit field

[Alan Bateman]

On Thu, 18 Jul 2024 12:30:24 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> There's a change in the heapDumper.cpp that probably has to change also, because I think we're now dumping signers twice (two lines).

The HPROF heap dump has a slot for signers so have to keep that to avoid breakage. So yes, it means two refs as the signers will be in the instance fields list too. The HPROF format could be rev'ed but may not be worth it.

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PR Comment: https://git.openjdk.org/jdk/pull/20223#issuecomment-2236404312