Need Information for memory sharing with AppCDS

[向伟(识月)]

Hi,

We am trying to take advantage of the characteristics of memory sharing with AppCDS, and we expected that the 
JVM internal packages and common packages can be shared with AppCDS.

In the user scenario, there are some common base packages for different Java processes with "-cp common_path"
Process A: -cp common_path:pathA  
Process B: -cp common_path:pathA:pathB
Process C: -cp common_path:pathC

I check the code in JDK11, and it uses SharedPathsMiscInfo to do the consistency check for class path.
The below usage can work in JDK11
Dump stage:
-cp common_path

Runtime stage:
-cp  common_path:new_path

But I find that SharedPathsMiscInfo has been removed in the latest JDK code. 

I need the information:
1. the new flow to do the consistency check.
2. constraint condition about the memory sharing among the different Java processes.

Is there any user guide to use the memory sharing feature for AppCDS?

Thanks,
Wei Xiang