def summarize_execution(
fn: Callable,
args: Sequence[object] = (),
kwargs: Mapping[str, object] = None,
detach_path: bool = True,
) -> ExecutionResult:
if not kwargs:
kwargs = {}
ret = None
exc = None
try:
symbolic_ret = fn(*args, **kwargs)
if detach_path:
context_statespace().detach_path()
_ret = realize(symbolic_ret)
# TODO, this covers up potential issues with return types. Handle differently?
# summarize iterators as the values they produce:
if hasattr(_ret, "__next__"):
ret = list(_ret)
else:
ret = _ret
except BaseException as e:
if isinstance(e, (UnexploredPath, IgnoreAttempt)):
raise
if in_debug():
debug("hit exception:", type(e), e, test_stack(e.__traceback__))
exc = e
if detach_path:
context_statespace().detach_path()
args = tuple(realize(a) for a in args)
kwargs = {k: realize(v) for (k, v) in kwargs.items()}
return ExecutionResult(ret, exc, args, kwargs)
def describe(self, include_postexec=False) -> str:
ret = ""
if self.exc:
exc = self.exc
exc_type = name_of_type(type(exc))
tb = test_stack(exc.__traceback__)
ret = f"exc={exc_type}: {str(exc)} {tb}"
else:
ret = f"ret={self.ret!r}"
if include_postexec:
a = [repr(a) for a in self.post_args]
a += [f"{k}={v!r}" for k, v in self.post_kwargs.items()]
ret += f' post=({", ".join(a)})'
return ret
def find_model_value(self, expr: z3.ExprRef) -> object:
with NoTracing():
while True:
if self.search_position.is_stem():
self.search_position = self.search_position.grow_into(
ModelValueNode(self._random, expr, self.solver))
node = self.search_position.simplify()
assert isinstance(node, ModelValueNode)
(chosen, next_node) = node.choose(favor_true=True)
self.choices_made.append(node)
self.search_position = next_node
if chosen:
self.solver.add(expr == node.condition_value)
ret = model_value_to_python(node.condition_value)
if in_debug():
debug("SMT realized symbolic:", expr, "==", repr(ret))
debug("Realized at", test_stack())
return ret
else:
self.solver.add(expr != node.condition_value)
def summarize_execution(
fn: Callable,
args: Sequence[object] = (),
kwargs: Mapping[str, object] = None) -> ExecutionResult:
if not kwargs:
kwargs = {}
ret = None
exc = None
try:
_ret = realize(fn(*args, **kwargs))
# summarize iterators as the values they produce:
if hasattr(_ret, "__next__"):
ret = list(_ret)
else:
ret = _ret
except BaseException as e:
if isinstance(e, (UnexploredPath, IgnoreAttempt)):
raise
if in_debug():
debug(type(e), e, test_stack(e.__traceback__))
exc = e
args = tuple(realize(a) for a in args)
kwargs = {k: realize(v) for (k, v) in kwargs.items()}
return ExecutionResult(ret, exc, args, kwargs)
def __init__(self, result: ExecutionResult):
self.ret = result.ret
self.exc = result.exc
self.tb = test_stack(self.exc.__traceback__) if self.exc else None
self.post_args = result.post_args
self.post_kwargs = result.post_kwargs