RFR: 8349716: IllegalAccessError when Proxy methods return object of a package-private type

[Chen Liang]

On Sun, 13 Apr 2025 09:49:46 GMT, Chen Liang <liach at openjdk.org> wrote:

> Proxy currently places proxy classes that proxy interfaces with package-private return types in dynamic modules. This means that if a return value is non-null, Proxy cannot return it and throws IllegalAccessError.
> 
> This patch changes strategy so proxy classes for any reference to package-private types (in parameter or return) are now considered as package-private, tightening the restrictions on proxy factories.

Testing: tier 1-3 passed

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PR Comment: https://git.openjdk.org/jdk/pull/24611#issuecomment-2800010741