RFR: 8241427: Coarsen locking in Modules::add_module_exports

[Claes Redestad]

Thanks,

I'm running some more tests before push to see that there aren't more
tests that hit the assert via WB.

/Claes

On 2020-03-25 20:33, Lois Foltan wrote:
> 
> 
> On 3/25/2020 2:51 PM, Harold Seigel wrote:
>> I'm okay with the change as is.
> 
> I'm good with .01 webrev as well.  Thanks for making those changes Claes!
> Lois
> 
> 
>>
>> Thanks, Harold
>>
>> On 3/25/2020 2:49 PM, Claes Redestad wrote:
>>> Not at all difficult, basically go back to open.00 and fix the things
>>> that doesn't change the interatction. But this difference is only
>>> observable when using the WhiteBox API to call into
>>> JVM_AddModuleExports* - all public APIs like Module.addExports(String,
>>> Module) will throw an IAE as usual (with tests to check that).
>>>
>>> I'm ok with dialing this RFE back a notch and file a follow-up for that,
>>> though.
>>>
>>> /Claes
>>>
>>> On 2020-03-25 19:33, Harold Seigel wrote:
>>>> How difficult would it be to restore the IAE?
>>>>
>>>> Thanks, Harold
>>>>
>>>> On 3/25/2020 2:17 PM, Claes Redestad wrote:
>>>>> Hi,
>>>>>
>>>>> On 2020-03-25 18:48, Harold Seigel wrote:
>>>>>> Hi Claes,
>>>>>>
>>>>>> It looks like you removed this from modules.cpp.  Can you also 
>>>>>> remove it from modules.hpp?
>>>>>>
>>>>>>     Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS)
>>>>>
>>>>> Done.
>>>>>
>>>>>>
>>>>>> Otherwise, the change looks good.
>>>>>
>>>>> I also updated the webrev to remove 2 tests that poke at the internal
>>>>> API to provoke the IAE we'll no longer be throwing. I'll need to check
>>>>> if there's any other fallout from higher tiers - or if we should dial
>>>>> this back a bit...
>>>>>
>>>>> /Claes
>