RFR: 8312623: SA add NestHost and NestMembers attributes when dumping class

[Ashutosh Mehra]

On Tue, 1 Aug 2023 08:33:24 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> @dholmes-ora I confirmed there is no nest-host or nest-members attributes generated by this patch for a top level class which doesn't have any nest-members. Is that what you wanted to verify?
>
> @ashu-mehra That was one case. I also want to know that you have tested deeply nested classes; and hidden classes (if applicable). Thanks.

@dholmes-ora I verified the case for hidden dynamically injected classes. The dumped class data for a hidden dynamically injected class does not have any Nest-Host attribute. When generating these classes dynamically the VM does not expose nest-host information in the class data, but sets the nest-host directly in the InstanceKlass.

Also verified the case for deeply nested classes by creating chain of nested classes as:

class DeepNest {
  class NestLvl1 {
    class NestLvl2 {
      class NestLvl3 {
      }
    }
  }
} 


Only `DeepNest` has the `NestMembers` attribute which lists all the NestLvl[1-3] classes. Rest all have `DeepNest` as the `NestHost` attribute.

Does this cover all the cases you flagged?

-------------

PR Comment: https://git.openjdk.org/jdk/pull/15005#issuecomment-1661077708