RFR: 8161604: TestNewSizeFlags fails with RuntimeException: max new size != MaxNewSize value

[Michail Chernov]

Hi Sangheon,


>> Thanks you for reviewing this. I'm no sure that explanations are 
>> needed in whitebox.cpp. I added the throwing of RuntimeException if 
>> we try to invoke Parallel GC specific methods when use not Parallel 
>> GC. Exception is more clear than 0 that was returned from methods. 
> I meant adding the explanation near "private static final long 
> PS_VIRTUAL_SPACE_ALIGNMENT = WB.psVirtualSpaceAlignment();" in 
> TestNewSizeFlags.java. Because someone would be strange as we are 
> calling it without checking GC type. But you explained that there's no 
> harm with that code.
>
> And I agree that adding something in whitebox.cpp is not necessary. 
> Even the new exception. :)
>
I'd like to keep the new exceptions in code. We have several White Box 
methods which can throw exceptions in similar cases (e.g. 
WB_G1GetMixedGCInfo). It looks more clear than meaningless 0.

Thanks
Michail