def visit_Assign(self, node): name = node.targets[0].id state = self.env[node.lineno] if name in self.symbolic_memory: state[name] = self.symbolic_memory[name] self.symbolic_memory[name] = eval_symbolic(node.value,state,self.symbolic_memory) self.generic_visit(node)
def visit_Assign(self, node):
name = node.targets[0].id
state = self.env[node.lineno]
if name in self.symbolic_memory:
state[name] = self.symbolic_memory[name]
self.symbolic_memory[name] = eval_symbolic(node.value, state,
self.symbolic_memory)
self.generic_visit(node)
def visit_While(self, node):
test = node.test
state = self.env[node.lineno]
iter_num = 1
loop = self.eval_if(test, state[iter_num])
expr = eval_symbolic(test, state[iter_num], self.symbolic_memory)
if not expr.is_const():
if loop:
self.path_constraints += [expr]
else:
self.path_constraints += [expr.negate()]
self.compare_and_update_stack(loop, self.branchno)
self.branchno += 1
if loop:
iter_num += 1
self.generic_visit(node)
while True:
loop = iter_num in state
if not expr.is_const():
self.compare_stack(loop, self.branchno)
if not loop:
break
if not expr.is_const():
self.update_stack(loop, self.branchno)
expr = eval_symbolic(test, state[iter_num],
self.symbolic_memory)
if not expr.is_const():
self.path_constraints += [expr]
self.branchno += 1
iter_num += 1
self.generic_visit(node)
def visit_While(self, node): test = node.test state = self.env[node.lineno] iter_num = 1 loop = self.eval_if(test,state[iter_num]) expr = eval_symbolic(test,state[iter_num],self.symbolic_memory) if not expr.is_const(): if loop: self.path_constraints += [expr] else: self.path_constraints += [expr.negate()] self.compare_and_update_stack(loop,self.branchno) self.branchno += 1 if loop: iter_num += 1 self.generic_visit(node) while True: loop = iter_num in state if not expr.is_const(): self.compare_stack(loop,self.branchno) if not loop: break if not expr.is_const(): self.update_stack(loop,self.branchno) expr = eval_symbolic(test,state[iter_num],self.symbolic_memory) if not expr.is_const(): self.path_constraints += [expr] self.branchno += 1 iter_num += 1 self.generic_visit(node)
def visit_If(self, node): test = node.test state = self.env[node.lineno] then_branch = self.eval_if(test,state) expr = eval_symbolic(test,state,self.symbolic_memory) if then_branch: orelse,node.orelse = node.orelse,[] self.path_constraints += [expr] else: body,node.body = node.body,[] self.path_constraints += [expr.negate()] self.compare_and_update_stack(then_branch,self.branchno) self.branchno += 1 self.generic_visit(node) if then_branch: node.orelse = orelse else: node.body = body
def visit_If(self, node):
test = node.test
state = self.env[node.lineno]
then_branch = self.eval_if(test, state)
expr = eval_symbolic(test, state, self.symbolic_memory)
if then_branch:
orelse, node.orelse = node.orelse, []
self.path_constraints += [expr]
else:
body, node.body = node.body, []
self.path_constraints += [expr.negate()]
self.compare_and_update_stack(then_branch, self.branchno)
self.branchno += 1
self.generic_visit(node)
if then_branch:
node.orelse = orelse
else:
node.body = body
