RFR: 8216557 Aarch64: Add support for Concurrent Class Unloading

[Ningsheng Jian]

Hi Stuart,

On 4/28/20 12:34 AM, Stuart Monteith wrote:
> Thanks Erik, Per, Andrew,
> 	I've fixed up the testcase and retested.
> 
> Uploaded here:
> 
> 	http://cr.openjdk.java.net/~smonteith/8216557/webrev.2/
> 
> Would someone be able to submit this for me?
> 

I submitted a build job before pushing your code, but it failed to build 
with minimal variant configure. Here's error message:

./src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp: In static member 
function 'static AdapterHandlerEntry* 
SharedRuntime::generate_i2c2i_adapters(MacroAssembler*, int, int, const 
BasicType*, const VMRegPair*, AdapterFingerPrint*)':

./src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp:736:5: error: 
invalid use of incomplete type 'class BarrierSetAssembler'

    bs->c2i_entry_barrier(masm);

I think you need to include barrierSetAssembler.hpp in 
sharedRuntime_aarch64.cpp?

Thanks,
Ningsheng