private static ExecutionContext buildInitializedContext(
VirtualMachine vm, String methodSignature, VMState state) {
VirtualMethod method = vm.getClassManager().getMethod(methodSignature);
ExecutionContext context = vm.spawnRootContext(method);
int registerCount = context.getMethodState().getRegisterCount();
setupMethodState(context, state.getRegisters(), registerCount);
setupClassStates(context, vm, state.getFields());
return context;
}
private static void setupMethodState(
ExecutionContext context, Map<Integer, HeapItem> registerToItem, int registerCount) {
MethodState mState = new MethodState(context, registerCount);
for (Entry<Integer, HeapItem> entry : registerToItem.entrySet()) {
Integer register = entry.getKey();
HeapItem item = entry.getValue();
mState.pokeRegister(register, item);
}
context.setMethodState(mState);
}
private static void setupClassStates(
ExecutionContext context,
VirtualMachine vm,
Map<String, Map<String, HeapItem>> classNameToFieldDescriptorToItem) {
ClassManager classManager = vm.getClassManager();
for (Entry<String, Map<String, HeapItem>> entry : classNameToFieldDescriptorToItem.entrySet()) {
String className = entry.getKey();
VirtualClass virtualClass = classManager.getVirtualClass(className);
Map<String, HeapItem> fieldDescriptorToItem = entry.getValue();
ClassState cState = context.peekClassState(virtualClass);
for (Entry<String, HeapItem> fieldNameAndTypeToItem : fieldDescriptorToItem.entrySet()) {
String fieldNameAndType = fieldNameAndTypeToItem.getKey();
String fieldName = fieldNameAndType.split(":")[0];
VirtualField field = virtualClass.getField(fieldName);
HeapItem item = fieldNameAndTypeToItem.getValue();
cState.pokeField(field, item);
}
context.initializeClass(cState, SideEffect.Level.NONE);
}
}
@Override
public void execute(ExecutionNode node, ExecutionContext ectx) {
HeapItem item = vm.getStaticFieldAccessor().getField(ectx, fieldDescriptor);
MethodState mState = ectx.getMethodState();
mState.assignRegister(destRegister, item);
}