def test_pointer_pointer(self):
ctx = newctx()
p1 = dt.fresh_ptr(ctx, util.fresh_name(
'p'), it.PointerType(it.PointerType(it.IntType(64))))
p2 = dt.fresh_ptr(ctx, util.fresh_name(
'p'), it.PointerType(it.IntType(64)))
p1.write(ctx, p2)
p2.write(ctx, util.i64(10))
self.assertEquals(p2.read(ctx).as_long(),
p1.read(ctx).read(ctx).as_long())
def test_pointer_pointer_pointer(self):
ctx = newctx()
a = dt.fresh_ptr(ctx, util.fresh_name(
'a'), it.PointerType(it.PointerType(it.IntType(64))))
b = dt.fresh_ptr(ctx, util.fresh_name(
'b'), it.PointerType(it.IntType(64)))
c = dt.fresh_ptr(ctx, util.fresh_name(
'c'), it.PointerType(it.IntType(64)))
cond = z3.Bool('cond')
p = util.If(cond, b, c)
a.write(ctx, p)
print a.read(ctx).read(ctx)
def test_read_read_same(self):
# "Helgi's problem"
ctx = newctx()
p = dt.fresh_ptr(ctx, util.fresh_name(
'p'), it.PointerType(it.IntType(64)))
self.assertEquals(p.getelementptr(ctx, util.i64(0)).read(
ctx), p.getelementptr(ctx, util.i64(0)).read(ctx))
def test_pointer_to_int(self):
ctx = newctx()
p = dt.fresh_ptr(ctx, util.fresh_name(
'p'), it.PointerType(it.IntType(64)))
print ctx['references'][p._ref._name]
p.write(ctx, util.i64(4))
self.assertEquals(4, p.read(ctx).as_long())
def test_pointer_ite(self):
ctx = newctx()
p1 = dt.fresh_ptr(ctx, util.fresh_name(
'p'), it.PointerType(it.IntType(64)))
p2 = dt.fresh_ptr(ctx, util.fresh_name(
'p'), it.PointerType(it.IntType(64)))
cond = z3.Bool('cond')
p3 = util.If(cond, p1, p2)
p3.write(ctx, util.i64(4))
s = z3.Solver()
s.add(z3.Not(z3.Implies(cond, p1.read(ctx) == util.i64(4))))
self.assertEquals(s.check(), z3.unsat)
s = z3.Solver()
s.add(z3.Not(z3.Implies(z3.Not(cond), p2.read(ctx) == util.i64(4))))
self.assertEquals(s.check(), z3.unsat)
def test_array_bounds(self):
ctx = newctx()
points = it.ArrayType(10, it.IntType(64))
p = dt.fresh_ptr(ctx, util.fresh_name('p'), points)
p = p.getelementptr(ctx, 50)
with self.assertRaises(IndexError):
p.write(ctx, util.i64(10))
def test_struct_of_ints(self):
ctx = newctx()
point = it.StructType('Point', [it.IntType(64), it.IntType(64)])
q = dt.fresh_ptr(ctx, util.fresh_name('q'), it.PointerType(point))
print ctx['references'][q._ref._name]
x = util.FreshBitVec('x', 64)
q.getelementptr(ctx, util.i64(0), util.i64(0)).write(ctx, x)
s = z3.Solver()
s.add(z3.Not(x == q.getelementptr(ctx, util.i64(0), util.i64(0)).read(ctx)))
self.assertEquals(s.check(), z3.unsat)
def declare_global_constant(self,
ctx,
name,
global_type,
value=None,
value_type=None):
ctx['globals'][name] = dt.fresh_ptr(ctx, name, global_type)
if value_type.is_array() and value_type.deref().is_int():
inner_size = value_type.deref().size()
for n, i in enumerate(util.parse_constant_array(value)):
ctx['globals'][name].getelementptr(
ctx, util.i64(0),
util.i64(n)).write(ctx, z3.BitVecVal(i, inner_size))
def declare_global_variable(self,
ctx,
name,
global_type,
value=None,
value_type=None):
def unknown_function(*args, **kwargs):
assert False, "Calling unknown function {}".format(name)
unknown_function.read = lambda *args, **kwargs: unknown_function
if global_type.deref(True).is_function():
ctx['globals'][name] = unknown_function
else:
ctx['globals'][name] = dt.fresh_ptr(ctx, name, global_type)
def test_array_of_stucts(self):
ctx = newctx()
points = it.ArrayType(10, it.StructType(
'Point', [it.IntType(64), it.IntType(64)]))
p = dt.fresh_ptr(ctx, util.fresh_name('p'), points)
y = util.FreshBitVec('y', 64)
x = util.FreshBitVec('x', 64)
# x and y are within bounds
ctx['solver'].add(z3.ULT(x, 10))
ctx['solver'].add(z3.ULT(y, 10))
p.getelementptr(ctx, x, util.i64(0)).write(ctx, x)
s = z3.Solver()
s.add(z3.Not(z3.Implies(x == y, p.getelementptr(
ctx, y, util.i64(0)).read(ctx) == y)))
self.assertEquals(s.check(), z3.unsat)
def alloca(self, ctx, return_type, size, size_type, **kwargs):
assert return_type.is_pointer()
return dt.fresh_ptr(ctx, util.fresh_name('alloca'), return_type)
