private static ILPattern CreateStaticFieldPattern()
{
// ldsfld (br_s)? stsfld newobj ldftn ldnull (brtrue_s | brtrue) ldsfld
return(ILPattern.Sequence(
ILPattern.Instruction(OpCodes.Ldsfld),
ILPattern.Optional(OpCodes.Br_S),
ILPattern.Instruction(OpCodes.Stsfld),
ILPattern.Instruction(OpCodes.Newobj),
ILPattern.Instruction(OpCodes.Ldftn),
ILPattern.Instruction(OpCodes.Ldnull),
ILPattern.Alternation(OpCodes.Brtrue, OpCodes.Brtrue_S),
ILPattern.Instruction(OpCodes.Ldsfld)));
}
public void TestComplexSequenceIsBackwardsMatch()
{
ILPattern sequence = ILPattern.Sequence(
ILPattern.Optional(OpCodes.Ret),
ILPattern.Instruction(OpCodes.Stsfld),
ILPattern.Alternation(OpCodes.Ldfld, OpCodes.Ldsfld));
Instruction lastInstruction = CreateTestMethodAndReturnLastInstruction(TestSequence1);
Assert.IsTrue(sequence.IsBackwardsMatch(lastInstruction));
lastInstruction = CreateTestMethodAndReturnLastInstruction(TestSequence2);
Assert.IsTrue(sequence.IsBackwardsMatch(lastInstruction));
}