private static Instruction[] GetStackInstructionsByStackBehaviour(StackBehaviour stackBehaviour, OpCode?pushOp = null)
{
return(stackBehaviour switch
{
StackBehaviour.Pop0 => new Instruction[] { },
StackBehaviour.Pop1 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 1),
StackBehaviour.Pop1_pop1 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 2),
StackBehaviour.Popi => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 1),
StackBehaviour.Popi_pop1 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popi_popi => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popi_popi8 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popi_popi_popi => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popi_popr4 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popi_popr8 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 1),
StackBehaviour.Popref_pop1 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref_popi => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref_popi_popi => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref_popi_popi8 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref_popi_popr4 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref_popi_popr8 => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Popref_popi_popref => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, 3),
StackBehaviour.Push0 => new Instruction[] { },
StackBehaviour.Push1 => ReferenceToMissingMemberRewriter.DuplicateInstruction(pushOp ?? OpCodes.Ldnull, 1),
StackBehaviour.Push1_push1 => ReferenceToMissingMemberRewriter.DuplicateInstruction(pushOp ?? OpCodes.Ldnull, 2),
StackBehaviour.Pushi => new[] { Instruction.Create(OpCodes.Ldc_I4_M1) },
StackBehaviour.Pushi8 => new[] { Instruction.Create(OpCodes.Ldc_I8, (long)-1) },
StackBehaviour.Pushr4 => new[] { Instruction.Create(OpCodes.Ldc_R4, (float)-1) },
StackBehaviour.Pushr8 => new[] { Instruction.Create(OpCodes.Ldc_R8, (double)-1) },
StackBehaviour.Pushref => ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Ldnull, 1),
StackBehaviour.PopAll => null,
StackBehaviour.Varpop => null,
StackBehaviour.Varpush => null,
_ => null
});
/// <inheritdoc />
public override bool Handle(ModuleDefinition module, ILProcessor cil, Instruction instruction)
{
// field reference
FieldReference fieldRef = RewriteHelper.AsFieldReference(instruction);
if (fieldRef != null && this.ShouldValidate(fieldRef.DeclaringType))
{
FieldDefinition target = fieldRef.Resolve();
if (target == null || target.HasConstant)
{
Instruction[] instructions = ReferenceToMissingMemberRewriter.GetStackInstructionsByInstruction(instruction);
instruction.OpCode = OpCodes.Nop;
instruction.Operand = null;
cil.Append(instruction, instructions);
this.MarkFlag(InstructionHandleResult.Rewritten, $"reference to {fieldRef.DeclaringType.FullName}.{fieldRef.Name} (no such field)");
#if SMAPI_FOR_MOBILE
this.Phrases.Add($"{cil.Body.Method.FullName} => {cil.Body.Instructions.Select(ins => ins.ToString()).Join(null, ";")}");
#endif
return(false);
}
}
// method reference
MethodReference methodRef = RewriteHelper.AsMethodReference(instruction);
if (methodRef != null && this.ShouldValidate(methodRef.DeclaringType) && !this.IsUnsupported(methodRef))
{
MethodDefinition target = methodRef.Resolve();
if (target == null)
{
string phrase;
if (this.IsProperty(methodRef))
{
phrase = $"reference to {methodRef.DeclaringType.FullName}.{methodRef.Name.Substring(4)} (no such property)";
}
else if (methodRef.Name == ".ctor")
{
phrase = $"reference to {methodRef.DeclaringType.FullName}.{methodRef.Name} (no matching constructor)";
}
else
{
phrase = $"reference to {methodRef.DeclaringType.FullName}.{methodRef.Name} (no such method)";
}
Instruction[] instructions = ReferenceToMissingMemberRewriter.GetStackInstructionsByInstruction(instruction);
instruction.OpCode = OpCodes.Nop;
instruction.Operand = null;
cil.Append(instruction, instructions);
this.MarkFlag(InstructionHandleResult.Rewritten, phrase);
return(false);
}
}
return(false);
}
private static Instruction[] GetStackInstructionsByInstruction(Instruction instruction)
{
Instruction[] instructionsPop = ReferenceToMissingMemberRewriter.GetStackInstructionsByStackBehaviour(instruction.OpCode.StackBehaviourPop);
Instruction[] instructionsPush;
FieldReference fieldRef = RewriteHelper.AsFieldReference(instruction);
if (fieldRef != null)
{
OpCode pushOp = RewriteHelper.GetLoadValueInstruction(fieldRef.FieldType.FullName).OpCode;
instructionsPush = ReferenceToMissingMemberRewriter.GetStackInstructionsByStackBehaviour(instruction.OpCode.StackBehaviourPush, pushOp);
}
else
{
instructionsPush = ReferenceToMissingMemberRewriter.GetStackInstructionsByStackBehaviour(instruction.OpCode.StackBehaviourPush);
}
if (instructionsPop == null)
{
MethodReference methodRef = RewriteHelper.AsMethodReference(instruction);
if (methodRef != null)
{
int thisInsCount = methodRef.HasThis ? instruction.OpCode == OpCodes.Newobj ? 0 : 1: 0;
instructionsPop = ReferenceToMissingMemberRewriter.DuplicateInstruction(OpCodes.Pop, methodRef.Parameters.Count + thisInsCount);
}
else
{
instructionsPop = new Instruction[] { }
};
}
if (instructionsPush == null)
{
MethodReference methodRef = RewriteHelper.AsMethodReference(instruction);
if (methodRef != null && methodRef.ReturnType.FullName != "System.Void")
{
instructionsPush = new[] { RewriteHelper.GetLoadValueInstruction(methodRef.ReturnType.FullName) }
}
;
else
{
instructionsPush = new Instruction[] { }
};
}
return(instructionsPop.Concat(instructionsPush.ToList()).ToArray());
}
