static MethodDefinition GenerateArrayReadFunc(TypeReference variable, int recursionCount)
{
if (!variable.IsArrayType())
{
Weaver.Error($"{variable} is an unsupported type. Jagged and multidimensional arrays are not supported");
return(null);
}
TypeReference elementType = variable.GetElementType();
MethodReference elementReadFunc = GetReadFunc(elementType, recursionCount + 1);
if (elementReadFunc == null)
{
return(null);
}
string functionName = "_ReadArray" + variable.GetElementType().Name + "_";
if (variable.DeclaringType != null)
{
functionName += variable.DeclaringType.Name;
}
else
{
functionName += "None";
}
// create new reader for this type
MethodDefinition readerFunc = new MethodDefinition(functionName,
MethodAttributes.Public |
MethodAttributes.Static |
MethodAttributes.HideBySig,
variable);
readerFunc.Parameters.Add(new ParameterDefinition("reader", ParameterAttributes.None, Weaver.CurrentAssembly.MainModule.ImportReference(Weaver.NetworkReaderType)));
readerFunc.Body.Variables.Add(new VariableDefinition(Weaver.int32Type));
readerFunc.Body.Variables.Add(new VariableDefinition(variable));
readerFunc.Body.Variables.Add(new VariableDefinition(Weaver.int32Type));
readerFunc.Body.InitLocals = true;
ILProcessor worker = readerFunc.Body.GetILProcessor();
// int length = reader.ReadPackedInt32();
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Call, GetReadFunc(Weaver.int32Type)));
worker.Append(worker.Create(OpCodes.Stloc_0));
// if (length < 0) {
// return null
// }
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Ldc_I4_0));
Instruction labelEmptyArray = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Bge, labelEmptyArray));
// return null
worker.Append(worker.Create(OpCodes.Ldnull));
worker.Append(worker.Create(OpCodes.Ret));
worker.Append(labelEmptyArray);
// T value = new T[length];
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Newarr, variable.GetElementType()));
worker.Append(worker.Create(OpCodes.Stloc_1));
// for (int i=0; i< length ; i++) {
worker.Append(worker.Create(OpCodes.Ldc_I4_0));
worker.Append(worker.Create(OpCodes.Stloc_2));
Instruction labelHead = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Br, labelHead));
// loop body
Instruction labelBody = worker.Create(OpCodes.Nop);
worker.Append(labelBody);
// value[i] = reader.ReadT();
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldloc_2));
worker.Append(worker.Create(OpCodes.Ldelema, variable.GetElementType()));
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Call, elementReadFunc));
worker.Append(worker.Create(OpCodes.Stobj, variable.GetElementType()));
worker.Append(worker.Create(OpCodes.Ldloc_2));
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
worker.Append(worker.Create(OpCodes.Add));
worker.Append(worker.Create(OpCodes.Stloc_2));
// loop while check
worker.Append(labelHead);
worker.Append(worker.Create(OpCodes.Ldloc_2));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Blt, labelBody));
// return value;
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ret));
return(readerFunc);
}
public static MethodReference GetWriteFunc(TypeReference variable, int recursionCount = 0)
{
if (writeFuncs.TryGetValue(variable.FullName, out MethodReference foundFunc))
{
return(foundFunc);
}
MethodDefinition newWriterFunc;
// Arrays are special, if we resolve them, we get the element type,
// so the following ifs might choke on it for scriptable objects
// or other objects that require a custom serializer
// thus check if it is an array and skip all the checks.
if (variable.IsArray)
{
newWriterFunc = GenerateArrayWriteFunc(variable, recursionCount);
RegisterWriteFunc(variable.FullName, newWriterFunc);
return(newWriterFunc);
}
if (variable.IsByReference)
{
// error??
Weaver.Error($"Cannot pass {variable} by reference");
return(null);
}
TypeDefinition td = variable.Resolve();
if (td == null)
{
Weaver.Error($"{variable} is not a supported type. Use a supported type or provide a custom writer");
return(null);
}
if (td.IsDerivedFrom(Weaver.ComponentType))
{
Weaver.Error($"Cannot generate writer for component type {variable}. Use a supported type or provide a custom writer");
return(null);
}
if (td.HasGenericParameters && !td.FullName.StartsWith("System.ArraySegment`1", System.StringComparison.Ordinal))
{
Weaver.Error($"Cannot generate writer for generic type {variable}. Use a concrete type or provide a custom writer");
return(null);
}
if (td.IsInterface)
{
Weaver.Error($"Cannot generate writer for interface {variable}. Use a concrete type or provide a custom writer");
return(null);
}
if (variable.Resolve().IsEnum)
{
return(GetWriteFunc(variable.Resolve().GetEnumUnderlyingType(), recursionCount));
}
else if (variable.FullName.StartsWith("System.ArraySegment`1", System.StringComparison.Ordinal))
{
newWriterFunc = GenerateArraySegmentWriteFunc(variable, recursionCount);
}
else
{
newWriterFunc = GenerateClassOrStructWriterFunction(variable, recursionCount);
}
if (newWriterFunc == null)
{
return(null);
}
RegisterWriteFunc(variable.FullName, newWriterFunc);
return(newWriterFunc);
}
static void GenerateSerialization(TypeDefinition td)
{
Weaver.DLog(td, " GenerateSerialization");
MethodDefinition existingMethod = td.GetMethodWith1Arg("Serialize", WeaverTypes.Import <Mirror.NetworkWriter>());
// do nothing if method exists and is abstract or not empty
if (existingMethod != null && (existingMethod.IsAbstract || !existingMethod.Body.IsEmptyDefault()))
{
return;
}
if (td.Fields.Count == 0)
{
return;
}
// check for self-referencing types
foreach (FieldDefinition field in td.Fields)
{
if (field.FieldType.FullName == td.FullName)
{
Weaver.Error($"{td.Name} has field {field.Name} that references itself", field);
return;
}
}
MethodDefinition serializeFunc = existingMethod ?? new MethodDefinition("Serialize",
MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
WeaverTypes.Import(typeof(void)));
//only add to new method
if (existingMethod == null)
{
serializeFunc.Parameters.Add(new ParameterDefinition("writer", ParameterAttributes.None, WeaverTypes.Import <Mirror.NetworkWriter>()));
}
ILProcessor worker = serializeFunc.Body.GetILProcessor();
if (existingMethod != null)
{
//remove default nop&ret from existing empty interface method
worker.Body.Instructions.Clear();
}
// if it is not a struct, call base
if (!td.IsValueType)
{
// call base
CallBase(td, worker, "Serialize");
}
foreach (FieldDefinition field in td.Fields)
{
if (field.IsStatic || field.IsPrivate || field.IsSpecialName)
{
continue;
}
CallWriter(worker, field);
}
worker.Append(worker.Create(OpCodes.Ret));
//only add if not just replaced body
if (existingMethod == null)
{
td.Methods.Add(serializeFunc);
}
}
static MethodDefinition GenerateClassOrStructWriterFunction(TypeReference variable, int recursionCount)
{
if (recursionCount > MaxRecursionCount)
{
Weaver.Error($"{variable} can't be serialized because it references itself");
return(null);
}
if (!Weaver.IsValidTypeToGenerate(variable.Resolve()))
{
return(null);
}
string functionName = "_Write" + variable.Name + "_";
if (variable.DeclaringType != null)
{
functionName += variable.DeclaringType.Name;
}
else
{
functionName += "None";
}
// create new writer for this type
MethodDefinition writerFunc = new MethodDefinition(functionName,
MethodAttributes.Public |
MethodAttributes.Static |
MethodAttributes.HideBySig,
Weaver.voidType);
writerFunc.Parameters.Add(new ParameterDefinition("writer", ParameterAttributes.None, Weaver.CurrentAssembly.MainModule.ImportReference(Weaver.NetworkWriterType)));
writerFunc.Parameters.Add(new ParameterDefinition("value", ParameterAttributes.None, Weaver.CurrentAssembly.MainModule.ImportReference(variable)));
ILProcessor worker = writerFunc.Body.GetILProcessor();
uint fields = 0;
foreach (FieldDefinition field in variable.Resolve().Fields)
{
if (field.IsStatic || field.IsPrivate)
{
continue;
}
MethodReference writeFunc = GetWriteFunc(field.FieldType, recursionCount + 1);
if (writeFunc != null)
{
fields++;
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldfld, field));
worker.Append(worker.Create(OpCodes.Call, writeFunc));
}
else
{
Weaver.Error($"{field} has unsupported type. Use a type supported by Mirror instead");
return(null);
}
}
if (fields == 0)
{
Log.Warning($" {variable} has no no public or non-static fields to serialize");
}
worker.Append(worker.Create(OpCodes.Ret));
return(writerFunc);
}
static MethodDefinition GenerateArrayWriteFunc(TypeReference variable, int recursionCount)
{
if (!variable.IsArrayType())
{
Weaver.Error($"{variable} is an unsupported type. Jagged and multidimensional arrays are not supported");
return(null);
}
TypeReference elementType = variable.GetElementType();
MethodReference elementWriteFunc = GetWriteFunc(elementType, recursionCount + 1);
if (elementWriteFunc == null)
{
return(null);
}
string functionName = "_WriteArray" + variable.GetElementType().Name + "_";
if (variable.DeclaringType != null)
{
functionName += variable.DeclaringType.Name;
}
else
{
functionName += "None";
}
// create new writer for this type
MethodDefinition writerFunc = new MethodDefinition(functionName,
MethodAttributes.Public |
MethodAttributes.Static |
MethodAttributes.HideBySig,
Weaver.voidType);
writerFunc.Parameters.Add(new ParameterDefinition("writer", ParameterAttributes.None, Weaver.CurrentAssembly.MainModule.ImportReference(Weaver.NetworkWriterType)));
writerFunc.Parameters.Add(new ParameterDefinition("value", ParameterAttributes.None, Weaver.CurrentAssembly.MainModule.ImportReference(variable)));
writerFunc.Body.Variables.Add(new VariableDefinition(Weaver.int32Type));
writerFunc.Body.Variables.Add(new VariableDefinition(Weaver.int32Type));
writerFunc.Body.InitLocals = true;
ILProcessor worker = writerFunc.Body.GetILProcessor();
// if (value == null)
// {
// writer.WritePackedInt32(-1);
// return;
// }
Instruction labelNull = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Brtrue, labelNull));
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldc_I4_M1));
worker.Append(worker.Create(OpCodes.Call, GetWriteFunc(Weaver.int32Type)));
worker.Append(worker.Create(OpCodes.Ret));
// int length = value.Length;
worker.Append(labelNull);
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldlen));
worker.Append(worker.Create(OpCodes.Stloc_0));
// writer.WritePackedInt32(length);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Call, GetWriteFunc(Weaver.int32Type)));
// for (int i=0; i< value.length; i++) {
worker.Append(worker.Create(OpCodes.Ldc_I4_0));
worker.Append(worker.Create(OpCodes.Stloc_1));
Instruction labelHead = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Br, labelHead));
// loop body
Instruction labelBody = worker.Create(OpCodes.Nop);
worker.Append(labelBody);
// writer.Write(value[i]);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldelema, variable.GetElementType()));
worker.Append(worker.Create(OpCodes.Ldobj, variable.GetElementType()));
worker.Append(worker.Create(OpCodes.Call, elementWriteFunc));
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
worker.Append(worker.Create(OpCodes.Add));
worker.Append(worker.Create(OpCodes.Stloc_1));
// end for loop
worker.Append(labelHead);
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldlen));
worker.Append(worker.Create(OpCodes.Conv_I4));
worker.Append(worker.Create(OpCodes.Blt, labelBody));
// return
worker.Append(worker.Create(OpCodes.Ret));
return(writerFunc);
}
void GenerateDeSerialization()
{
Weaver.DLog(netBehaviourSubclass, " GenerateDeSerialization");
const string DeserializeMethodName = "DeserializeSyncVars";
if (netBehaviourSubclass.GetMethod(DeserializeMethodName) != null)
{
return;
}
if (syncVars.Count == 0)
{
// no synvars, no need for custom OnDeserialize
return;
}
MethodDefinition serialize = new MethodDefinition(DeserializeMethodName,
MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
WeaverTypes.Import(typeof(void)));
serialize.Parameters.Add(new ParameterDefinition("reader", ParameterAttributes.None, WeaverTypes.Import <Mirror.NetworkReader>()));
serialize.Parameters.Add(new ParameterDefinition("initialState", ParameterAttributes.None, WeaverTypes.Import <bool>()));
ILProcessor serWorker = serialize.Body.GetILProcessor();
// setup local for dirty bits
serialize.Body.InitLocals = true;
VariableDefinition dirtyBitsLocal = new VariableDefinition(WeaverTypes.Import <long>());
serialize.Body.Variables.Add(dirtyBitsLocal);
MethodReference baseDeserialize = Resolvers.TryResolveMethodInParents(netBehaviourSubclass.BaseType, Weaver.CurrentAssembly, DeserializeMethodName);
if (baseDeserialize != null)
{
// base
serWorker.Append(serWorker.Create(OpCodes.Ldarg_0));
// reader
serWorker.Append(serWorker.Create(OpCodes.Ldarg_1));
// initialState
serWorker.Append(serWorker.Create(OpCodes.Ldarg_2));
serWorker.Append(serWorker.Create(OpCodes.Call, baseDeserialize));
}
// Generates: if (initialState);
Instruction initialStateLabel = serWorker.Create(OpCodes.Nop);
serWorker.Append(serWorker.Create(OpCodes.Ldarg_2));
serWorker.Append(serWorker.Create(OpCodes.Brfalse, initialStateLabel));
foreach (FieldDefinition syncVar in syncVars)
{
DeserializeField(syncVar, serWorker, serialize);
}
serWorker.Append(serWorker.Create(OpCodes.Ret));
// Generates: end if (initialState);
serWorker.Append(initialStateLabel);
// get dirty bits
serWorker.Append(serWorker.Create(OpCodes.Ldarg_1));
serWorker.Append(serWorker.Create(OpCodes.Call, Readers.GetReadFunc(WeaverTypes.Import <ulong>())));
serWorker.Append(serWorker.Create(OpCodes.Stloc_0));
// conditionally read each syncvar
// start at number of syncvars in parent
int dirtyBit = Weaver.GetSyncVarStart(netBehaviourSubclass.BaseType.FullName);
foreach (FieldDefinition syncVar in syncVars)
{
Instruction varLabel = serWorker.Create(OpCodes.Nop);
// check if dirty bit is set
serWorker.Append(serWorker.Create(OpCodes.Ldloc_0));
serWorker.Append(serWorker.Create(OpCodes.Ldc_I8, 1L << dirtyBit));
serWorker.Append(serWorker.Create(OpCodes.And));
serWorker.Append(serWorker.Create(OpCodes.Brfalse, varLabel));
DeserializeField(syncVar, serWorker, serialize);
serWorker.Append(varLabel);
dirtyBit += 1;
}
if (Weaver.GenerateLogErrors)
{
serWorker.Append(serWorker.Create(OpCodes.Ldstr, "Injected Deserialize " + netBehaviourSubclass.Name));
serWorker.Append(serWorker.Create(OpCodes.Call, WeaverTypes.logErrorReference));
}
serWorker.Append(serWorker.Create(OpCodes.Ret));
netBehaviourSubclass.Methods.Add(serialize);
}
public static void ProcessSyncVars(TypeDefinition td, List <FieldDefinition> syncVars, List <FieldDefinition> syncObjects, Dictionary <FieldDefinition, FieldDefinition> syncVarNetIds)
{
int numSyncVars = 0;
// the mapping of dirtybits to sync-vars is implicit in the order of the fields here. this order is recorded in m_replacementProperties.
// start assigning syncvars at the place the base class stopped, if any
int dirtyBitCounter = Weaver.GetSyncVarStart(td.BaseType.FullName);
syncVarNetIds.Clear();
// find syncvars
foreach (FieldDefinition fd in td.Fields)
{
if (fd.HasCustomAttribute(Weaver.SyncVarType))
{
if ((fd.Attributes & FieldAttributes.Static) != 0)
{
Weaver.Error($"{fd.Name} cannot be static", fd);
return;
}
if (fd.FieldType.IsArray)
{
Weaver.Error($"{fd.Name} has invalid type. Use SyncLists instead of arrays", fd);
return;
}
if (SyncObjectInitializer.ImplementsSyncObject(fd.FieldType))
{
Weaver.Warning($"{fd.Name} has [SyncVar] attribute. SyncLists should not be marked with SyncVar", fd);
}
else
{
syncVars.Add(fd);
ProcessSyncVar(td, fd, syncVarNetIds, 1L << dirtyBitCounter);
dirtyBitCounter += 1;
numSyncVars += 1;
if (dirtyBitCounter == SyncVarLimit)
{
Weaver.Error($"{td.Name} has too many SyncVars. Consider refactoring your class into multiple components", td);
return;
}
}
}
if (fd.FieldType.Resolve().ImplementsInterface(Weaver.SyncObjectType))
{
if (fd.IsStatic)
{
Weaver.Error($"{fd.Name} cannot be static", fd);
return;
}
if (fd.FieldType.Resolve().HasGenericParameters)
{
Weaver.Error($"Cannot use generic SyncObject {fd.Name} directly in NetworkBehaviour. Create a class and inherit from the generic SyncObject instead", fd);
return;
}
syncObjects.Add(fd);
}
}
// add all the new SyncVar __netId fields
foreach (FieldDefinition fd in syncVarNetIds.Values)
{
td.Fields.Add(fd);
}
Weaver.SetNumSyncVars(td.FullName, numSyncVars);
}
public NetworkBehaviourProcessor(TypeDefinition td)
{
Weaver.DLog(td, "NetworkBehaviourProcessor");
netBehaviourSubclass = td;
}
/// <summary>
/// [SyncVar] int/float/struct/etc.?
/// </summary>
/// <param name="syncVar"></param>
/// <param name="serWorker"></param>
/// <param name="deserialize"></param>
/// <param name="initialState"></param>
/// <param name="hookResult"></param>
void DeserializeNormalField(FieldDefinition syncVar, ILProcessor serWorker, MethodDefinition deserialize, MethodDefinition hookMethod)
{
/*
* Generates code like:
* // for hook
* int oldValue = a;
* Networka = reader.ReadPackedInt32();
* if (!SyncVarEqual(oldValue, ref a))
* {
* OnSetA(oldValue, Networka);
* }
*/
MethodReference readFunc = Readers.GetReadFunc(syncVar.FieldType);
if (readFunc == null)
{
Weaver.Error($"{syncVar.Name} has unsupported type. Use a supported Mirror type instead", syncVar);
return;
}
// T oldValue = value;
VariableDefinition oldValue = new VariableDefinition(syncVar.FieldType);
deserialize.Body.Variables.Add(oldValue);
serWorker.Append(serWorker.Create(OpCodes.Ldarg_0));
serWorker.Append(serWorker.Create(OpCodes.Ldfld, syncVar));
serWorker.Append(serWorker.Create(OpCodes.Stloc, oldValue));
// read value and store in syncvar BEFORE calling the hook
// -> this makes way more sense. by definition, the hook is
// supposed to be called after it was changed. not before.
// -> setting it BEFORE calling the hook fixes the following bug:
// https://github.com/vis2k/Mirror/issues/1151 in host mode
// where the value during the Hook call would call Cmds on
// the host server, and they would all happen and compare
// values BEFORE the hook even returned and hence BEFORE the
// actual value was even set.
// put 'this.' onto stack for 'this.syncvar' below
serWorker.Append(serWorker.Create(OpCodes.Ldarg_0));
// reader. for 'reader.Read()' below
serWorker.Append(serWorker.Create(OpCodes.Ldarg_1));
// reader.Read()
serWorker.Append(serWorker.Create(OpCodes.Call, readFunc));
// syncvar
serWorker.Append(serWorker.Create(OpCodes.Stfld, syncVar));
if (hookMethod != null)
{
// call hook
// but only if SyncVar changed. otherwise a client would
// get hook calls for all initial values, even if they
// didn't change from the default values on the client.
// see also: https://github.com/vis2k/Mirror/issues/1278
// Generates: if (!SyncVarEqual);
Instruction syncVarEqualLabel = serWorker.Create(OpCodes.Nop);
// 'this.' for 'this.SyncVarEqual'
serWorker.Append(serWorker.Create(OpCodes.Ldarg_0));
// 'oldValue'
serWorker.Append(serWorker.Create(OpCodes.Ldloc, oldValue));
// 'ref this.syncVar'
serWorker.Append(serWorker.Create(OpCodes.Ldarg_0));
serWorker.Append(serWorker.Create(OpCodes.Ldflda, syncVar));
// call the function
GenericInstanceMethod syncVarEqualGm = new GenericInstanceMethod(WeaverTypes.syncVarEqualReference);
syncVarEqualGm.GenericArguments.Add(syncVar.FieldType);
serWorker.Append(serWorker.Create(OpCodes.Call, syncVarEqualGm));
serWorker.Append(serWorker.Create(OpCodes.Brtrue, syncVarEqualLabel));
// call the hook
// Generates: OnValueChanged(oldValue, this.syncVar);
SyncVarProcessor.WriteCallHookMethodUsingField(serWorker, hookMethod, oldValue, syncVar);
// Generates: end if (!SyncVarEqual);
serWorker.Append(syncVarEqualLabel);
}
}
void GenerateSerialization()
{
Weaver.DLog(netBehaviourSubclass, " GenerateSerialization");
const string SerializeMethodName = "SerializeSyncVars";
if (netBehaviourSubclass.GetMethod(SerializeMethodName) != null)
{
return;
}
if (syncVars.Count == 0)
{
// no synvars, no need for custom OnSerialize
return;
}
MethodDefinition serialize = new MethodDefinition(SerializeMethodName,
MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig,
WeaverTypes.Import <bool>());
serialize.Parameters.Add(new ParameterDefinition("writer", ParameterAttributes.None, WeaverTypes.Import <Mirror.NetworkWriter>()));
serialize.Parameters.Add(new ParameterDefinition("forceAll", ParameterAttributes.None, WeaverTypes.Import <bool>()));
ILProcessor worker = serialize.Body.GetILProcessor();
serialize.Body.InitLocals = true;
// loc_0, this local variable is to determine if any variable was dirty
VariableDefinition dirtyLocal = new VariableDefinition(WeaverTypes.Import <bool>());
serialize.Body.Variables.Add(dirtyLocal);
MethodReference baseSerialize = Resolvers.TryResolveMethodInParents(netBehaviourSubclass.BaseType, Weaver.CurrentAssembly, SerializeMethodName);
if (baseSerialize != null)
{
// base
worker.Append(worker.Create(OpCodes.Ldarg_0));
// writer
worker.Append(worker.Create(OpCodes.Ldarg_1));
// forceAll
worker.Append(worker.Create(OpCodes.Ldarg_2));
worker.Append(worker.Create(OpCodes.Call, baseSerialize));
// set dirtyLocal to result of base.OnSerialize()
worker.Append(worker.Create(OpCodes.Stloc_0));
}
// Generates: if (forceAll);
Instruction initialStateLabel = worker.Create(OpCodes.Nop);
// forceAll
worker.Append(worker.Create(OpCodes.Ldarg_2));
worker.Append(worker.Create(OpCodes.Brfalse, initialStateLabel));
foreach (FieldDefinition syncVar in syncVars)
{
// Generates a writer call for each sync variable
// writer
worker.Append(worker.Create(OpCodes.Ldarg_1));
// this
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldfld, syncVar));
MethodReference writeFunc = Writers.GetWriteFunc(syncVar.FieldType);
if (writeFunc != null)
{
worker.Append(worker.Create(OpCodes.Call, writeFunc));
}
else
{
Weaver.Error($"{syncVar.Name} has unsupported type. Use a supported Mirror type instead", syncVar);
return;
}
}
// always return true if forceAll
// Generates: return true
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
worker.Append(worker.Create(OpCodes.Ret));
// Generates: end if (forceAll);
worker.Append(initialStateLabel);
// write dirty bits before the data fields
// Generates: writer.WritePackedUInt64 (base.get_syncVarDirtyBits ());
// writer
worker.Append(worker.Create(OpCodes.Ldarg_1));
// base
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Call, WeaverTypes.NetworkBehaviourDirtyBitsReference));
MethodReference writeUint64Func = Writers.GetWriteFunc(WeaverTypes.Import <ulong>());
worker.Append(worker.Create(OpCodes.Call, writeUint64Func));
// generate a writer call for any dirty variable in this class
// start at number of syncvars in parent
int dirtyBit = Weaver.GetSyncVarStart(netBehaviourSubclass.BaseType.FullName);
foreach (FieldDefinition syncVar in syncVars)
{
Instruction varLabel = worker.Create(OpCodes.Nop);
// Generates: if ((base.get_syncVarDirtyBits() & 1uL) != 0uL)
// base
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Call, WeaverTypes.NetworkBehaviourDirtyBitsReference));
// 8 bytes = long
worker.Append(worker.Create(OpCodes.Ldc_I8, 1L << dirtyBit));
worker.Append(worker.Create(OpCodes.And));
worker.Append(worker.Create(OpCodes.Brfalse, varLabel));
// Generates a call to the writer for that field
// writer
worker.Append(worker.Create(OpCodes.Ldarg_1));
// base
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldfld, syncVar));
MethodReference writeFunc = Writers.GetWriteFunc(syncVar.FieldType);
if (writeFunc != null)
{
worker.Append(worker.Create(OpCodes.Call, writeFunc));
}
else
{
Weaver.Error($"{syncVar.Name} has unsupported type. Use a supported Mirror type instead", syncVar);
return;
}
// something was dirty
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
// set dirtyLocal to true
worker.Append(worker.Create(OpCodes.Stloc_0));
worker.Append(varLabel);
dirtyBit += 1;
}
if (Weaver.GenerateLogErrors)
{
worker.Append(worker.Create(OpCodes.Ldstr, "Injected Serialize " + netBehaviourSubclass.Name));
worker.Append(worker.Create(OpCodes.Call, WeaverTypes.logErrorReference));
}
// generate: return dirtyLocal
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Ret));
netBehaviourSubclass.Methods.Add(serialize);
}
void GenerateConstants()
{
if (commands.Count == 0 && clientRpcs.Count == 0 && targetRpcs.Count == 0 && syncObjects.Count == 0)
{
return;
}
Weaver.DLog(netBehaviourSubclass, " GenerateConstants ");
// find static constructor
MethodDefinition cctor = netBehaviourSubclass.GetMethod(".cctor");
bool cctorFound = cctor != null;
if (cctor != null)
{
// remove the return opcode from end of function. will add our own later.
if (cctor.Body.Instructions.Count != 0)
{
Instruction retInstr = cctor.Body.Instructions[cctor.Body.Instructions.Count - 1];
if (retInstr.OpCode == OpCodes.Ret)
{
cctor.Body.Instructions.RemoveAt(cctor.Body.Instructions.Count - 1);
}
else
{
Weaver.Error($"{netBehaviourSubclass.Name} has invalid class constructor", cctor);
return;
}
}
}
else
{
// make one!
cctor = new MethodDefinition(".cctor", MethodAttributes.Private |
MethodAttributes.HideBySig |
MethodAttributes.SpecialName |
MethodAttributes.RTSpecialName |
MethodAttributes.Static,
WeaverTypes.Import(typeof(void)));
}
// find instance constructor
MethodDefinition ctor = netBehaviourSubclass.GetMethod(".ctor");
if (ctor == null)
{
Weaver.Error($"{netBehaviourSubclass.Name} has invalid constructor", netBehaviourSubclass);
return;
}
Instruction ret = ctor.Body.Instructions[ctor.Body.Instructions.Count - 1];
if (ret.OpCode == OpCodes.Ret)
{
ctor.Body.Instructions.RemoveAt(ctor.Body.Instructions.Count - 1);
}
else
{
Weaver.Error($"{netBehaviourSubclass.Name} has invalid constructor", ctor);
return;
}
// TODO: find out if the order below matters. If it doesn't split code below into 2 functions
ILProcessor ctorWorker = ctor.Body.GetILProcessor();
ILProcessor cctorWorker = cctor.Body.GetILProcessor();
for (int i = 0; i < commands.Count; ++i)
{
CmdResult cmdResult = commands[i];
GenerateRegisterCommandDelegate(cctorWorker, WeaverTypes.registerCommandDelegateReference, commandInvocationFuncs[i], cmdResult);
}
for (int i = 0; i < clientRpcs.Count; ++i)
{
ClientRpcResult clientRpcResult = clientRpcs[i];
GenerateRegisterRemoteDelegate(cctorWorker, WeaverTypes.registerRpcDelegateReference, clientRpcInvocationFuncs[i], clientRpcResult.method.Name);
}
for (int i = 0; i < targetRpcs.Count; ++i)
{
GenerateRegisterRemoteDelegate(cctorWorker, WeaverTypes.registerRpcDelegateReference, targetRpcInvocationFuncs[i], targetRpcs[i].Name);
}
foreach (FieldDefinition fd in syncObjects)
{
SyncObjectInitializer.GenerateSyncObjectInitializer(ctorWorker, fd);
}
cctorWorker.Append(cctorWorker.Create(OpCodes.Ret));
if (!cctorFound)
{
netBehaviourSubclass.Methods.Add(cctor);
}
// finish ctor
ctorWorker.Append(ctorWorker.Create(OpCodes.Ret));
// in case class had no cctor, it might have BeforeFieldInit, so injected cctor would be called too late
netBehaviourSubclass.Attributes &= ~TypeAttributes.BeforeFieldInit;
}
static MethodDefinition GenerateListWriteFunc(TypeReference variable, int recursionCount)
{
GenericInstanceType genericInstance = (GenericInstanceType)variable;
TypeReference elementType = genericInstance.GenericArguments[0];
MethodReference elementWriteFunc = GetWriteFunc(elementType, recursionCount + 1);
MethodReference intWriterFunc = GetWriteFunc(WeaverTypes.Import <int>());
// need this null check till later PR when GetWriteFunc throws exception instead
if (elementWriteFunc == null)
{
Weaver.Error($"Cannot generate writer for List because element {elementType.Name} does not have a writer. Use a supported type or provide a custom writer", variable);
return(null);
}
MethodDefinition writerFunc = GenerateWriterFunc(variable);
writerFunc.Body.Variables.Add(new VariableDefinition(WeaverTypes.Import <int>()));
writerFunc.Body.Variables.Add(new VariableDefinition(WeaverTypes.Import <int>()));
writerFunc.Body.InitLocals = true;
ILProcessor worker = writerFunc.Body.GetILProcessor();
// if (value == null)
// {
// writer.WritePackedInt32(-1);
// return;
// }
Instruction labelNull = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Brtrue, labelNull));
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldc_I4_M1));
worker.Append(worker.Create(OpCodes.Call, intWriterFunc));
worker.Append(worker.Create(OpCodes.Ret));
// else not null
worker.Append(labelNull);
MethodReference countref = WeaverTypes.ListCountReference.MakeHostInstanceGeneric(genericInstance);
// int count = value.Count;
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Call, countref));
worker.Append(worker.Create(OpCodes.Stloc_0));
// writer.WritePackedInt32(count);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Call, intWriterFunc));
// Loop through the List<T> and call the writer for each element.
// generates this:
// for (int i=0; i < count; i++)
// {
// writer.WriteT(value[i]);
// }
worker.Append(worker.Create(OpCodes.Ldc_I4_0));
worker.Append(worker.Create(OpCodes.Stloc_1));
Instruction labelHead = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Br, labelHead));
// loop body
Instruction labelBody = worker.Create(OpCodes.Nop);
worker.Append(labelBody);
MethodReference getItem = WeaverTypes.ListGetItemReference.MakeHostInstanceGeneric(genericInstance);
// writer.Write(value[i]);
worker.Append(worker.Create(OpCodes.Ldarg_0)); // writer
worker.Append(worker.Create(OpCodes.Ldarg_1)); // value
worker.Append(worker.Create(OpCodes.Ldloc_1)); // i
worker.Append(worker.Create(OpCodes.Call, getItem)); //get_Item
worker.Append(worker.Create(OpCodes.Call, elementWriteFunc)); // Write
// end for loop
// for loop i++
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
worker.Append(worker.Create(OpCodes.Add));
worker.Append(worker.Create(OpCodes.Stloc_1));
worker.Append(labelHead);
// for loop i < count
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Blt, labelBody));
// return
worker.Append(worker.Create(OpCodes.Ret));
return(writerFunc);
}
static MethodDefinition GenerateArraySegmentWriteFunc(TypeReference variable, int recursionCount)
{
GenericInstanceType genericInstance = (GenericInstanceType)variable;
TypeReference elementType = genericInstance.GenericArguments[0];
MethodReference elementWriteFunc = GetWriteFunc(elementType, recursionCount + 1);
MethodReference intWriterFunc = GetWriteFunc(WeaverTypes.Import <int>());
// need this null check till later PR when GetWriteFunc throws exception instead
if (elementWriteFunc == null)
{
Weaver.Error($"Cannot generate writer for ArraySegment because element {elementType.Name} does not have a writer. Use a supported type or provide a custom writer", variable);
return(null);
}
MethodDefinition writerFunc = GenerateWriterFunc(variable);
writerFunc.Body.Variables.Add(new VariableDefinition(WeaverTypes.Import <int>()));
writerFunc.Body.Variables.Add(new VariableDefinition(WeaverTypes.Import <int>()));
ILProcessor worker = writerFunc.Body.GetILProcessor();
MethodReference countref = WeaverTypes.ArraySegmentCountReference.MakeHostInstanceGeneric(genericInstance);
// int length = value.Count;
worker.Append(worker.Create(OpCodes.Ldarga_S, (byte)1));
worker.Append(worker.Create(OpCodes.Call, countref));
worker.Append(worker.Create(OpCodes.Stloc_0));
// writer.WritePackedInt32(length);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Call, intWriterFunc));
// Loop through the ArraySegment<T> and call the writer for each element.
// generates this:
// for (int i=0; i< length; i++)
// {
// writer.Write(value.Array[i + value.Offset]);
// }
worker.Append(worker.Create(OpCodes.Ldc_I4_0));
worker.Append(worker.Create(OpCodes.Stloc_1));
Instruction labelHead = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Br, labelHead));
// loop body
Instruction labelBody = worker.Create(OpCodes.Nop);
worker.Append(labelBody);
// writer.Write(value.Array[i + value.Offset]);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldarga_S, (byte)1));
worker.Append(worker.Create(OpCodes.Call, WeaverTypes.ArraySegmentArrayReference.MakeHostInstanceGeneric(genericInstance)));
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldarga_S, (byte)1));
worker.Append(worker.Create(OpCodes.Call, WeaverTypes.ArraySegmentOffsetReference.MakeHostInstanceGeneric(genericInstance)));
worker.Append(worker.Create(OpCodes.Add));
worker.Append(worker.Create(OpCodes.Ldelema, elementType));
worker.Append(worker.Create(OpCodes.Ldobj, elementType));
worker.Append(worker.Create(OpCodes.Call, elementWriteFunc));
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
worker.Append(worker.Create(OpCodes.Add));
worker.Append(worker.Create(OpCodes.Stloc_1));
// end for loop
worker.Append(labelHead);
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Blt, labelBody));
// return
worker.Append(worker.Create(OpCodes.Ret));
return(writerFunc);
}
static MethodDefinition GenerateArrayWriteFunc(TypeReference variable, int recursionCount)
{
if (!variable.IsArrayType())
{
throw new GenerateWriterException($"{variable.Name} is an unsupported type. Jagged and multidimensional arrays are not supported", variable);
}
TypeReference elementType = variable.GetElementType();
MethodReference elementWriteFunc = GetWriteFunc(elementType, recursionCount + 1);
MethodReference intWriterFunc = GetWriteFunc(WeaverTypes.Import <int>());
// need this null check till later PR when GetWriteFunc throws exception instead
if (elementWriteFunc == null)
{
Weaver.Error($"Cannot generate writer for Array because element {elementType.Name} does not have a writer. Use a supported type or provide a custom writer", variable);
return(null);
}
MethodDefinition writerFunc = GenerateWriterFunc(variable);
writerFunc.Body.Variables.Add(new VariableDefinition(WeaverTypes.Import <int>()));
writerFunc.Body.Variables.Add(new VariableDefinition(WeaverTypes.Import <int>()));
ILProcessor worker = writerFunc.Body.GetILProcessor();
// if (value == null)
// {
// writer.WritePackedInt32(-1);
// return;
// }
Instruction labelNull = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Brtrue, labelNull));
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldc_I4_M1));
worker.Append(worker.Create(OpCodes.Call, intWriterFunc));
worker.Append(worker.Create(OpCodes.Ret));
// else not null
worker.Append(labelNull);
// int length = value.Length;
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldlen));
worker.Append(worker.Create(OpCodes.Stloc_0));
// writer.WritePackedInt32(length);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldloc_0));
worker.Append(worker.Create(OpCodes.Call, intWriterFunc));
// for (int i=0; i< value.length; i++) {
worker.Append(worker.Create(OpCodes.Ldc_I4_0));
worker.Append(worker.Create(OpCodes.Stloc_1));
Instruction labelHead = worker.Create(OpCodes.Nop);
worker.Append(worker.Create(OpCodes.Br, labelHead));
// loop body
Instruction labelBody = worker.Create(OpCodes.Nop);
worker.Append(labelBody);
// writer.Write(value[i]);
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldelema, elementType));
worker.Append(worker.Create(OpCodes.Ldobj, elementType));
worker.Append(worker.Create(OpCodes.Call, elementWriteFunc));
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldc_I4_1));
worker.Append(worker.Create(OpCodes.Add));
worker.Append(worker.Create(OpCodes.Stloc_1));
// end for loop
worker.Append(labelHead);
worker.Append(worker.Create(OpCodes.Ldloc_1));
worker.Append(worker.Create(OpCodes.Ldarg_1));
worker.Append(worker.Create(OpCodes.Ldlen));
worker.Append(worker.Create(OpCodes.Conv_I4));
worker.Append(worker.Create(OpCodes.Blt, labelBody));
// return
worker.Append(worker.Create(OpCodes.Ret));
return(writerFunc);
}