[12] RFR(S) 8206963: [AOT] bug with multiple class loaders

[dean.long at oracle.com]

What about the case where the AOT code has dependencies on classes that 
are loaded by a custom class loader?  Wouldn't we need to disable the 
AOT code in that case?  I'm trying to come up with a test case for that.

dl


On 10/5/18 7:36 AM, Vladimir Kozlov wrote:
> http://cr.openjdk.java.net/~kvn/8206963/webrev.01/
> https://bugs.openjdk.java.net/browse/JDK-8206963
>
> After investigations and discussions I suggest that AOT should not 
> support custom class loaders. The main issue is during AOT compilation 
> we don't know anything about them and their constrains. JAOTC uses 
> only standard builtin loaders.
> Otherwise we would have to add class runtime checks to all field 
> accesses and inlined code and create separate memory for class 
> pointers (AOT 'got' cells) per method which may cause significant 
> performance regression.
>
> I will update limitations in AOT JEP.
>
> Changes passed tier1-3 and Xcomp testing.
>