def test_eval_with_types():
ap = 5
fp = 10
prime = 13
evaluator = ExpressionEvaluator(prime=prime, ap=ap, fp=fp, memory={})
assert evaluator.eval(parse_expr('cast(ap, T*)')) == ap
def test_eval_registers():
ap = 5
fp = 10
prime = 13
evaluator = ExpressionEvaluator(prime=prime, ap=ap, fp=fp, memory={})
assert evaluator.eval(
parse_expr('2 * ap + 3 * fp - 5')) == (2 * ap + 3 * fp - 5) % prime
def test_eval_registers_and_memory():
ap = 5
fp = 10
prime = 13
memory = {(2 * ap + 3 * fp - 5) % prime: 7, 7: 5, 6: 0}
evaluator = ExpressionEvaluator(prime=prime, ap=ap, fp=fp, memory=memory)
assert evaluator.eval(parse_expr('[2 * ap + 3 * fp - 5]')) == 7
assert evaluator.eval(parse_expr('[[2 * ap + 3 * fp - 5]] + 3 * ap')) == \
(memory[7] + 3 * ap) % prime
assert evaluator.eval(parse_expr('[[[2 * ap + 3 * fp - 5]]+1]')) == 0
def test_revoked_reference():
reference_manager = ReferenceManager()
ref_id = reference_manager.alloc_id(reference=Reference(
pc=0,
value=parse_expr('[ap + 1]'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
))
identifier_values = {
scope('x'):
ReferenceDefinition(full_name=scope('x'),
cairo_type=TypeFelt(),
references=[]),
}
prime = 2**64 + 13
ap = 100
fp = 200
memory = {}
flow_tracking_data = FlowTrackingDataActual(
ap_tracking=RegTrackingData(group=1, offset=4),
reference_ids={scope('x'): ref_id},
)
context = VmConstsContext(
identifiers=IdentifierManager.from_dict(identifier_values),
evaluator=ExpressionEvaluator(prime, ap, fp, memory).eval,
reference_manager=reference_manager,
flow_tracking_data=flow_tracking_data,
memory=memory,
pc=0)
consts = VmConsts(context=context, accessible_scopes=[ScopedName()])
with pytest.raises(FlowTrackingError, match='Failed to deduce ap.'):
assert consts.x
def get_vm_consts(identifier_values, reference_manager, flow_tracking_data, memory={}):
"""
Creates a simple VmConsts object.
"""
identifiers = IdentifierManager.from_dict(identifier_values)
context = VmConstsContext(
identifiers=identifiers,
evaluator=ExpressionEvaluator(2**64 + 13, 0, 0, memory, identifiers).eval,
reference_manager=reference_manager,
flow_tracking_data=flow_tracking_data, memory=memory, pc=9)
return VmConsts(context=context, accessible_scopes=[ScopedName()])
def load_hints(self, program: Program, program_base: MaybeRelocatable):
for i, (pc, hint) in enumerate(program.hints.items(), len(self.hint_pcs)):
self.hints[pc + program_base] = CompiledHint(
compiled=self.compile_hint(hint.code, f'<hint{i}>'),
# Use hint=hint in the lambda's arguments to capture this value (otherwise, it
# will use the same hint object for all iterations).
consts=lambda pc, ap, fp, memory, hint=hint: VmConsts(
context=VmConstsContext(
identifiers=program.identifiers,
evaluator=ExpressionEvaluator(self.prime, ap, fp, memory).eval,
reference_manager=program.reference_manager,
flow_tracking_data=hint.flow_tracking_data,
memory=memory,
pc=pc),
accessible_scopes=hint.accessible_scopes))
self.hint_pcs[i] = pc + program_base
def test_references():
reference_manager = ReferenceManager()
references = {
scope('x.ref'):
reference_manager.alloc_id(
Reference(
pc=0,
value=parse_expr('[ap + 1]'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
)),
scope('x.ref2'):
reference_manager.alloc_id(
Reference(
pc=0,
value=parse_expr('[ap + 1] + 0'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
)),
scope('x.ref3'):
reference_manager.alloc_id(
Reference(
pc=0,
value=parse_expr('ap + 1'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
)),
scope('x.typeref'):
reference_manager.alloc_id(
Reference(
pc=0,
value=mark_types_in_expr_resolved(
parse_expr('cast(ap + 1, MyStruct*)')),
ap_tracking_data=RegTrackingData(group=0, offset=3),
)),
scope('x.typeref2'):
reference_manager.alloc_id(
Reference(
pc=0,
value=mark_types_in_expr_resolved(
parse_expr('cast([ap + 1], MyStruct*)')),
ap_tracking_data=RegTrackingData(group=0, offset=3),
)),
}
my_struct_star = TypePointer(
pointee=TypeStruct(scope=scope('MyStruct'), is_fully_resolved=True))
identifier_values = {
scope('x.ref'):
ReferenceDefinition(full_name=scope('x.ref'),
cairo_type=TypeFelt(),
references=[]),
scope('x.ref2'):
ReferenceDefinition(full_name=scope('x.ref2'),
cairo_type=TypeFelt(),
references=[]),
scope('x.ref3'):
ReferenceDefinition(full_name=scope('x.ref3'),
cairo_type=TypeFelt(),
references=[]),
scope('x.typeref'):
ReferenceDefinition(full_name=scope('x.typeref'),
cairo_type=my_struct_star,
references=[]),
scope('x.typeref2'):
ReferenceDefinition(full_name=scope('x.typeref2'),
cairo_type=my_struct_star,
references=[]),
scope('MyStruct'):
StructDefinition(
full_name=scope('MyStruct'),
members={
'member': MemberDefinition(offset=10, cairo_type=TypeFelt()),
},
size=11,
),
}
prime = 2**64 + 13
ap = 100
fp = 200
memory = {
(ap - 2) + 1: 1234,
(ap - 1) + 1: 1000,
(ap - 1) + 1 + 2: 13,
(ap - 1) + 1 + 10: 17,
}
flow_tracking_data = FlowTrackingDataActual(
ap_tracking=RegTrackingData(group=0, offset=4),
reference_ids=references,
)
context = VmConstsContext(
identifiers=IdentifierManager.from_dict(identifier_values),
evaluator=ExpressionEvaluator(prime, ap, fp, memory).eval,
reference_manager=reference_manager,
flow_tracking_data=flow_tracking_data,
memory=memory,
pc=0)
consts = VmConsts(context=context, accessible_scopes=[ScopedName()])
assert consts.x.ref == memory[(ap - 2) + 1]
assert consts.x.typeref.address_ == (ap - 1) + 1
assert consts.x.typeref.member == memory[(ap - 1) + 1 + 10]
with pytest.raises(IdentifierError,
match="'abc' is not a member of 'MyStruct'."):
consts.x.typeref.abc
with pytest.raises(IdentifierError,
match="'SIZE' is not a member of 'MyStruct'."):
consts.x.typeref.SIZE
with pytest.raises(
AssertionError,
match='Cannot change the value of a struct definition.'):
consts.MyStruct = 13
assert consts.MyStruct.member == 10
with pytest.raises(AssertionError,
match='Cannot change the value of a constant.'):
consts.MyStruct.member = 13
assert consts.MyStruct.SIZE == 11
with pytest.raises(AssertionError,
match='Cannot change the value of a constant.'):
consts.MyStruct.SIZE = 13
with pytest.raises(IdentifierError,
match="'abc' is not a member of 'MyStruct'."):
consts.MyStruct.abc
# Test that VmConsts can be used to assign values to references of the form '[...]'.
memory.clear()
consts.x.ref = 1234
assert memory == {(ap - 2) + 1: 1234}
memory.clear()
consts.x.typeref.member = 1001
assert memory == {(ap - 1) + 1 + 10: 1001}
memory.clear()
consts.x.typeref2 = 4321
assert memory == {(ap - 1) + 1: 4321}
consts.x.typeref2.member = 1
assert memory == {
(ap - 1) + 1: 4321,
4321 + 10: 1,
}
with pytest.raises(AssertionError,
match='Cannot change the value of a scope definition'):
consts.x = 1000
with pytest.raises(
AssertionError,
match=
r'x.ref2 \(= \[ap \+ 1\] \+ 0\) does not reference memory and cannot be assigned.',
):
consts.x.ref2 = 1000
with pytest.raises(
AssertionError,
match=
r'x.typeref \(= ap \+ 1\) does not reference memory and cannot be assigned.',
):
consts.x.typeref = 1000
def test_references():
reference_manager = ReferenceManager()
references = {
scope('x.ref'):
reference_manager.get_id(
Reference(
pc=0,
value=parse_expr('[ap + 1]'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
)),
scope('x.ref2'):
reference_manager.get_id(
Reference(
pc=0,
value=parse_expr('[ap + 1] + 0'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
)),
scope('x.ref3'):
reference_manager.get_id(
Reference(
pc=0,
value=parse_expr('ap + 1'),
ap_tracking_data=RegTrackingData(group=0, offset=2),
)),
scope('x.typeref'):
reference_manager.get_id(
Reference(
pc=0,
value=mark_types_in_expr_resolved(
parse_expr('cast(ap + 1, a*)')),
ap_tracking_data=RegTrackingData(group=0, offset=3),
)),
scope('x.typeref2'):
reference_manager.get_id(
Reference(
pc=0,
value=mark_types_in_expr_resolved(
parse_expr('cast([ap + 1], a*)')),
ap_tracking_data=RegTrackingData(group=0, offset=3),
)),
}
identifier_values = {
scope('x.ref'):
ReferenceDefinition(full_name=scope('x.ref'), references=[]),
scope('x.ref2'):
ReferenceDefinition(full_name=scope('x.ref2'), references=[]),
scope('x.ref3'):
ReferenceDefinition(full_name=scope('x.ref3'), references=[]),
scope('x.typeref'):
ReferenceDefinition(full_name=scope('x.typeref'), references=[]),
scope('x.typeref2'):
ReferenceDefinition(full_name=scope('x.typeref2'), references=[]),
scope('a.member'):
MemberDefinition(offset=10, cairo_type=TypeFelt()),
scope('a.scope0.member'):
MemberDefinition(offset=2, cairo_type=TypeFelt()),
}
prime = 2**64 + 13
ap = 100
fp = 200
memory = {
(ap - 2) + 1: 1234,
(ap - 1) + 1: 1000,
(ap - 1) + 1 + 2: 13,
(ap - 1) + 1 + 10: 17,
}
flow_tracking_data = FlowTrackingDataActual(
ap_tracking=RegTrackingData(group=0, offset=4),
reference_ids=references,
)
context = VmConstsContext(
identifiers=IdentifierManager.from_dict(identifier_values),
evaluator=ExpressionEvaluator(prime, ap, fp, memory).eval,
reference_manager=reference_manager,
flow_tracking_data=flow_tracking_data,
memory=memory,
pc=0)
consts = VmConsts(context=context, accessible_scopes=[ScopedName()])
assert consts.x.ref == memory[(ap - 2) + 1]
assert consts.x.typeref.address_ == (ap - 1) + 1
assert consts.x.typeref.member == memory[(ap - 1) + 1 + 10]
with pytest.raises(
NotImplementedError,
match="Expected a member, found 'scope0' which is 'scope'"):
consts.x.typeref.scope0
# Test that VmConsts can be used to assign values to references of the form '[...]'.
memory.clear()
consts.x.ref = 1234
assert memory == {(ap - 2) + 1: 1234}
memory.clear()
consts.x.typeref.member = 1001
assert memory == {(ap - 1) + 1 + 10: 1001}
memory.clear()
consts.x.typeref2 = 4321
assert memory == {(ap - 1) + 1: 4321}
consts.x.typeref2.member = 1
assert memory == {
(ap - 1) + 1: 4321,
4321 + 10: 1,
}
with pytest.raises(AssertionError,
match='Cannot change the value of a scope definition'):
consts.x = 1000
with pytest.raises(
AssertionError,
match=
r'x.ref2 \(= \[ap \+ 1\] \+ 0\) does not reference memory and cannot be assigned.',
):
consts.x.ref2 = 1000
with pytest.raises(
AssertionError,
match=
r'x.typeref \(= ap \+ 1\) does not reference memory and cannot be assigned.',
):
consts.x.typeref = 1000