Supress loading of malicious class without exiting the program

[algomaster99]

Right now, we call System.exit when we are loading a class that does not belong to the index. This results in exiting the program. However, this is not a good approach for applications running on cloud.

I propose that instead of calling System.exit, we rewrite the bytecode so that it simply logs it to STDOUT. This way we don't exit the program and continue the execution.

[algomaster99]

REVERT opcode in EVM bytecode is also a good idea. It resets the state until the last checkpoint.

[algomaster99]

Related paper - Enhancing server availability and security through failure-oblivious computing