Need help with change

[Staffan Larsen]

When doing heap iteration with JVMTI, the spec requires callbacks from the VM to the agent identifying the signers and protection domain references. This is what tagMap does, see jvmtiTagMap.cpp:2464. 

As long as it it still possible for JVMTI to find these references (with ik->protection_domain() and ik->signers()), I think it's ok.

/Staffan


On 21 maj 2013, at 14:52, Coleen Phillimore <coleen.phillimore at oracle.com> wrote:

> 
> I found during code review comment editing for my change that removes signers and protection domain from the InstanceKlass, that JVMTI code seems to have some sort of call back and knowledge of these fields in instanceKlass.
> 
>          </constant>
>          <constant id="JVMTI_REFERENCE_SIGNERS" num="5">
>            Reference from a class to its signers array.
>          </constant>
>          <constant id="JVMTI_REFERENCE_PROTECTION_DOMAIN" num="6">
>            Reference from a class to its protection domain.
> 
> 
> If I remove these, will it cause incompatibilities?   It's used during jvmtiTagMap.cpp (whatever that's doing).
> 
> Thanks,
> Coleen