Homework Assignments Week 2.3: Virtual Machines

Bytecode Execution

Execute the bytecode instructions of A/main()V, starting with an empty stack. The initial value of local variable 0 is 4242 4103, pointing to an object of class A. Show stacks and local variables after each instruction.

Code for A/main()V

aload_0
bipush 5
iconst_4
isub
invokevirtual A/m(I)V

Code for A/m(I)V

    goto l2
l1: iinc 1 -1
l2: iload_1
    ifne l1
return

Code for Hint: iinc 1 -1

iload_1
ldc -1
iadd
istore_1