def execute(self):
obj = self.peek_op_stack()
if obj.is_null:
action = actions.throw_null_pointer()
else:
action = actions.ThrowObject(obj)
return Actions(action)
def execute(self):
value, index, array = (self.peek_op_stack(i) for i in range(3))
if array.is_null:
return actions.throw_null_pointer()
return IncrementProgramCounter.after(
actions.StoreIntoArray(array=array, index=index.value, value=value),
Pop(3)
)
def execute(self):
array = self.peek_op_stack()
if array.is_null:
return actions.throw_null_pointer()
else:
size = len(array.value)
result = Integer.create_instance(size)
return IncrementProgramCounter.after(actions.Pop(),
actions.Push(result))
def execute(self):
field_ref = self.operand_as_constant()
name = field_name_from_field_ref(field_ref)
obj = self.peek_op_stack()
if obj.is_null:
return actions.throw_null_pointer()
value = obj.value.fields[name]
return IncrementProgramCounter.after(actions.Pop(),
actions.Push(value))
def execute(self):
index = self.peek_op_stack()
array = self.peek_op_stack(1)
if array.is_null:
return actions.throw_null_pointer()
value = array.value[index.value]
return IncrementProgramCounter.after(
actions.Pop(2),
actions.Push(value)
)
def execute(self):
field_ref = self.operand_as_constant()
name = field_name_from_field_ref(field_ref)
value = self.peek_op_stack(0)
obj = self.peek_op_stack(1)
if obj.is_null:
return actions.throw_null_pointer()
return IncrementProgramCounter.after(
actions.Pop(2), actions.PutField(obj, name, value))
def test_int_load_from_null_array():
array = NULL_VALUE
index = Integer.create_instance(0)
assert_instruction(
instruction='iaload',
op_stack=[index, array],
expected=[
throw_null_pointer()
]
)
def test_int_store_into_null_array():
value = SOME_INT
index = Integer.create_instance(1)
array = NULL_VALUE
assert_instruction(
instruction='iastore',
op_stack=[value, index, array],
expected=[
throw_null_pointer()
]
)