Request for review:8021948:Change InstanceKlass::_source_file_name and _generic_signature from Symbol* to constant pool index

[Jiangli Zhou]

Hi,

Could anyone help me review this?

Thanks,
Jiangli

On 07/31/2013 01:51 PM, Jiangli Zhou wrote:
> Hi,
>
> Please review following change for JDK-8021948 
> <https://jbs.oracle.com/bugs/browse/JDK-8021948>:
>
> http://cr.openjdk.java.net/~jiangli/8021948/webrev.00/
>
> Both InstanceKlass::_source_file_name and 
> InstanceKlass::_generic_signature were pointers to Symbol. They are 
> now indexes to constant pool entries. Both fields are now u2 type, and 
> co-located with other non-pointer type fields for more efficient 
> alignment on 64-bit machine. On 32-bit machine, the change saves 
> 4bytes for each class.
>
> Tested with JPRT, vm.quick.testlist, nsk.sajdi.testlist, 
> nsk.stress.testlist and nsk.jvmti.testlist.
>
> Thanks,
> Jiangli

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