Review request for 4917309 and 6864003

[Alan Bateman]

Mandy Chung wrote:
> David Holmes - Sun Microsystems wrote:
>> Hi Mandy,
>>
>>  661 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
>>  662                                               const char* name,
>>  663                                               jboolean throwError))
>>
>> Can't we now drop the throwError parameter altogether?
>>
> Yes, I could.  I agree it doesn't need this throwError parameter.   I 
> decide to leave it since it helps to avoid the synchronized pushes.  
> JVM_FindClassFromBootLoader is already in a promoted build.   I can 
> push the JDK fix and HotSpot fix at the same time.  Note that the JDK 
> fix and HotSpot fix are pushed and integrated in two different gates 
> and at different time.
>
> If I modify the signature, I would have to push the HS fix first (say 
> b68).  Wait until b68 is promoted, then I can push the JDK fix in b70.
>
> If you strongly feel that I should drop the throwError parameter, I 
> could make the change.
Mandy,

I see in ClassLoader#loadClass that you still allow 
findBootstrapClassOrNull to throw CNF. I assume this is needed until 
there is a promoted build with the updated JVM_FindClassFromBootLoader, 
after which you will go back to clean it up - do I have this right? If 
so, they perhaps this helps with the justification to do this in two 
phases and eliminate throwError before any code can call it.

Otherwise, good work. I hope the reduction in CNF exceptions will make a 
measurable difference.

-Alan.