RFR: 8060130: Simplify the synchronization of defining and getting java.lang.Package

[Claes Redestad]

On 10/13/2014 05:29 PM, Peter Levart wrote:
> On 10/13/2014 05:15 PM, Peter Levart wrote:
>> Yes, I realized I got this messed up and have prepared a new patch 
>> which passes tests and includes your previous
>> comments:
>>
>> http://cr.openjdk.java.net/~redestad/8060130/webrev.04 
>
>
> Hi Claes,
>
> Hm, CachedManifest.getManifest() in 4th webrev is still a little 
> faulty. It sometimes returns EMPTY_MANIFEST and sometimes null. I 
> think it should always return null in case when no manifest is found 
> (at least that was the old code behaviour).

Hmm, yes, that last little detail of making sure we also set m before 
returning:

-                manifest = (m == null ? EMPTY_MANIFEST : m);
+                manifest = m = (m == null ? EMPTY_MANIFEST : m);

http://cr.openjdk.java.net/~redestad/8060130/webrev.05

We rely on returning a non-null manifest from 
CachedManifest.getManifest() in the current code, so returning null 
would be a bad idea unless we revert the simplifications to 
defineSystemPackage.

/Claes

>
> Regards, Peter