Test expressions interferences

2 files changed, 112 insertions, 0 deletions

diff --git a/example/expression/interfer.py b/example/expression/interfer.py
new file mode 100644
index 00000000..5055e1f6
--- /dev/null
+++ b/example/expression/interfer.py
@@ -0,0 +1,111 @@
+from miasm.analysis.data_flow import State
+from miasm.expression.expression import *
+
+"""
+Test memory interferences
+"""
+
+a32 = ExprId('a', 32)
+b32 = ExprId('b', 32)
+
+a64 = ExprId('a', 64)
+b64 = ExprId('b', 64)
+
+mem_a32_32 = ExprMem(a32, 32)
+mem_b32_32 = ExprMem(b32, 32)
+
+mem_a64_32 = ExprMem(a64, 32)
+
+mem_a32_m1_8 = ExprMem(a32 + ExprInt(-1, 32), 8)
+mem_a32_p0_8 = ExprMem(a32, 8)
+mem_a32_p1_8 = ExprMem(a32 + ExprInt(1, 32), 8)
+mem_a32_p2_8 = ExprMem(a32 + ExprInt(2, 32), 8)
+mem_a32_p3_8 = ExprMem(a32 + ExprInt(3, 32), 8)
+mem_a32_p4_8 = ExprMem(a32 + ExprInt(4, 32), 8)
+
+
+mem_a32_m4_32 = ExprMem(a32 + ExprInt(-4, 32), 32)
+mem_a32_m3_32 = ExprMem(a32 + ExprInt(-3, 32), 32)
+mem_a32_m2_32 = ExprMem(a32 + ExprInt(-2, 32), 32)
+mem_a32_m1_32 = ExprMem(a32 + ExprInt(-1, 32), 32)
+mem_a32_p0_32 = ExprMem(a32, 32)
+mem_a32_p1_32 = ExprMem(a32 + ExprInt(1, 32), 32)
+mem_a32_p2_32 = ExprMem(a32 + ExprInt(2, 32), 32)
+mem_a32_p3_32 = ExprMem(a32 + ExprInt(3, 32), 32)
+mem_a32_p4_32 = ExprMem(a32 + ExprInt(4, 32), 32)
+
+
+mem_a64_m4_32 = ExprMem(a64 + ExprInt(-4, 64), 32)
+mem_a64_m3_32 = ExprMem(a64 + ExprInt(-3, 64), 32)
+mem_a64_m2_32 = ExprMem(a64 + ExprInt(-2, 64), 32)
+mem_a64_m1_32 = ExprMem(a64 + ExprInt(-1, 64), 32)
+mem_a64_p0_32 = ExprMem(a64, 32)
+mem_a64_p1_32 = ExprMem(a64 + ExprInt(1, 64), 32)
+mem_a64_p2_32 = ExprMem(a64 + ExprInt(2, 64), 32)
+mem_a64_p3_32 = ExprMem(a64 + ExprInt(3, 64), 32)
+mem_a64_p4_32 = ExprMem(a64 + ExprInt(4, 64), 32)
+
+
+state = State()
+
+
+assert state.may_interfer(set([mem_a32_32]), mem_b32_32) == True
+assert state.may_interfer(set([mem_b32_32]), mem_a32_32) == True
+
+# Test 8 bit accesses
+assert state.may_interfer(set([mem_a32_m1_8]), mem_a32_32) == False
+assert state.may_interfer(set([mem_a32_p0_8]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p1_8]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p2_8]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p3_8]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p4_8]), mem_a32_32) == False
+
+assert state.may_interfer(set([mem_a32_32]), mem_a32_m1_8) == False
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p0_8) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p1_8) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p2_8) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p3_8) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p4_8) == False
+
+
+# Test 32 bit accesses
+assert state.may_interfer(set([mem_a32_m4_32]), mem_a32_32) == False
+assert state.may_interfer(set([mem_a32_m3_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_m2_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_m1_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p0_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p1_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p2_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p3_32]), mem_a32_32) == True
+assert state.may_interfer(set([mem_a32_p4_32]), mem_a32_32) == False
+
+assert state.may_interfer(set([mem_a32_32]), mem_a32_m4_32) == False
+assert state.may_interfer(set([mem_a32_32]), mem_a32_m3_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_m2_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_m1_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p0_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p1_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p2_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p3_32) == True
+assert state.may_interfer(set([mem_a32_32]), mem_a32_p4_32) == False
+
+# Test 32 bit accesses with 64 bit memory address
+assert state.may_interfer(set([mem_a64_m4_32]), mem_a64_32) == False
+assert state.may_interfer(set([mem_a64_m3_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_m2_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_m1_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_p0_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_p1_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_p2_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_p3_32]), mem_a64_32) == True
+assert state.may_interfer(set([mem_a64_p4_32]), mem_a64_32) == False
+
+assert state.may_interfer(set([mem_a64_32]), mem_a64_m4_32) == False
+assert state.may_interfer(set([mem_a64_32]), mem_a64_m3_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_m2_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_m1_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_p0_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_p1_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_p2_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_p3_32) == True
+assert state.may_interfer(set([mem_a64_32]), mem_a64_p4_32) == False
diff --git a/test/test_all.py b/test/test_all.py
index f0ac755e..a49f6ff9 100755
--- a/test/test_all.py
+++ b/test/test_all.py
@@ -710,6 +710,7 @@ for script in [["basic_op.py"],
                ["expr_random.py"],
                ["expr_translate.py"],
                ["expr_reduce.py"],
+               ["interfer.py"],
                ]:
     testset += ExampleExpression(script)