public static unsafe nint FindSignatureInModule(ProcessModule module, SignatureDefinition sigDef)
{
nint ptr = FindSignatureInBlock(
module.BaseAddress,
module.ModuleMemorySize,
sigDef.pattern,
sigDef.mask,
sigDef.offset
);
if (ptr != 0 && sigDef.xref)
{
ptr = XrefScannerLowLevel.JumpTargets(ptr).FirstOrDefault();
}
return(ptr);
}
private static void HookClassFromType()
{
var lib = LoadLibrary("GameAssembly.dll");
var classFromTypeEntryPoint = GetProcAddress(lib, nameof(IL2CPP.il2cpp_class_from_il2cpp_type));
LogSupport.Trace($"il2cpp_class_from_il2cpp_type entry address: {classFromTypeEntryPoint}");
var targetMethod = XrefScannerLowLevel.JumpTargets(classFromTypeEntryPoint).Single();
LogSupport.Trace($"Xref scan target: {targetMethod}");
if (targetMethod == IntPtr.Zero)
{
return;
}
ourOriginalTypeToClassMethod = Detour.Detour(targetMethod, new TypeToClassDelegate(ClassFromTypePatch));
LogSupport.Trace("il2cpp_class_from_il2cpp_type patched");
}
private static void HookClassFromType()
{
var lib = LoadLibrary("UserAssembly.dll");
var classFromTypeEntryPoint = GetProcAddress(lib, nameof(IL2CPP.il2cpp_class_from_il2cpp_type));
LogSupport.Trace($"il2cpp_class_from_il2cpp_type entry address: {classFromTypeEntryPoint}");
var targetMethod = XrefScannerLowLevel.JumpTargets(classFromTypeEntryPoint).Single();
LogSupport.Trace($"Xref scan target: {targetMethod}");
if (targetMethod == IntPtr.Zero)
{
return;
}
IntPtr *targetVarPointer = &targetMethod;
DoHook((IntPtr)targetVarPointer,
Marshal.GetFunctionPointerForDelegate(new TypeToClassDelegate(ClassFromTypePatch)));
ourOriginalTypeToClassMethod = Marshal.GetDelegateForFunctionPointer <TypeToClassDelegate>(targetMethod);
LogSupport.Trace("il2cpp_class_from_il2cpp_type patched");
}
public static void DoPass(RewriteGlobalContext context, UnhollowerOptions options)
{
if (string.IsNullOrEmpty(options.GameAssemblyPath))
{
Pass15GenerateMemberContexts.HasObfuscatedMethods = false;
return;
}
if (!Pass15GenerateMemberContexts.HasObfuscatedMethods)
{
return;
}
var methodToCallersMap = new Dictionary <long, List <long> >();
var methodToCalleesMap = new Dictionary <long, List <long> >();
using var mappedFile = MemoryMappedFile.CreateFromFile(options.GameAssemblyPath, FileMode.Open, null, 0, MemoryMappedFileAccess.Read);
using var accessor = mappedFile.CreateViewAccessor(0, 0, MemoryMappedFileAccess.Read);
IntPtr gameAssemblyPtr;
unsafe
{
byte *fileStartPtr = null;
accessor.SafeMemoryMappedViewHandle.AcquirePointer(ref fileStartPtr);
gameAssemblyPtr = (IntPtr)fileStartPtr;
}
// Scan xrefs
foreach (var assemblyRewriteContext in context.Assemblies)
{
foreach (var typeRewriteContext in assemblyRewriteContext.Types)
{
foreach (var originalTypeMethod in typeRewriteContext.Methods)
{
var address = originalTypeMethod.FileOffset;
if (address == 0)
{
continue;
}
foreach (var callTarget in XrefScannerLowLevel.CallAndIndirectTargets(IntPtr.Add(gameAssemblyPtr, (int)address)))
{
var targetRelative = (long)callTarget - (long)gameAssemblyPtr;
methodToCallersMap.GetOrCreate(targetRelative, _ => new List <long>()).Add(address);
methodToCalleesMap.GetOrCreate(address, _ => new List <long>()).Add(targetRelative);
}
}
}
}
MapOfCallers = methodToCallersMap;
void MarkMethodAlive(long address)
{
if (!NonDeadMethods.Add(address))
{
return;
}
if (!methodToCalleesMap.TryGetValue(address, out var calleeList))
{
return;
}
foreach (var callee in calleeList)
{
MarkMethodAlive(callee);
}
}
// Now decided which of them are possible dead code
foreach (var assemblyRewriteContext in context.Assemblies)
{
foreach (var typeRewriteContext in assemblyRewriteContext.Types)
{
foreach (var methodRewriteContext in typeRewriteContext.Methods)
{
if (methodRewriteContext.FileOffset == 0)
{
continue;
}
var originalMethod = methodRewriteContext.OriginalMethod;
if (!originalMethod.Name.IsObfuscated() || originalMethod.IsVirtual)
{
MarkMethodAlive(methodRewriteContext.FileOffset);
}
}
}
}
}
public override void OnApplicationStart()
{
if (!CheckWasSuccessful || !MustStayTrue || MustStayFalse)
{
return;
}
AdvancedSafetySettings.RegisterSettings();
ClassInjector.RegisterTypeInIl2Cpp <SortingOrderHammerer>();
try
{
BundleVerifierMod.OnApplicationStart(HarmonyInstance);
}
catch (Exception ex)
{
MelonLogger.Error($"Error initializing Bundle Verifier: {ex}");
}
var matchingMethods = typeof(AssetManagement)
.GetMethods(BindingFlags.Public | BindingFlags.Static | BindingFlags.DeclaredOnly).Where(it =>
it.Name.StartsWith("Method_Public_Static_Object_Object_Vector3_Quaternion_Boolean_Boolean_Boolean_") && it.GetParameters().Length == 6).ToList();
foreach (var matchingMethod in matchingMethods)
{
ObjectInstantiateDelegate originalInstantiateDelegate = null;
ObjectInstantiateDelegate replacement = (assetPtr, pos, rot, allowCustomShaders, isUI, validate, nativeMethodPointer) =>
ObjectInstantiatePatch(assetPtr, pos, rot, allowCustomShaders, isUI, validate, nativeMethodPointer, originalInstantiateDelegate);
NativePatchUtils.NativePatch(matchingMethod, out originalInstantiateDelegate, replacement);
}
foreach (var nestedType in typeof(VRCAvatarManager).GetNestedTypes())
{
var moveNext = nestedType.GetMethod("MoveNext");
if (moveNext == null)
{
continue;
}
var avatarManagerField = nestedType.GetProperties().SingleOrDefault(it => it.PropertyType == typeof(VRCAvatarManager));
if (avatarManagerField == null)
{
continue;
}
MelonDebug.Msg($"Patching UniTask type {nestedType.FullName}");
var fieldOffset = (int)IL2CPP.il2cpp_field_get_offset((IntPtr)UnhollowerUtils
.GetIl2CppFieldInfoPointerFieldForGeneratedFieldAccessor(avatarManagerField.GetMethod)
.GetValue(null));
unsafe
{
var originalMethodPointer = *(IntPtr *)(IntPtr)UnhollowerUtils.GetIl2CppMethodInfoPointerFieldForGeneratedMethod(moveNext).GetValue(null);
originalMethodPointer = XrefScannerLowLevel.JumpTargets(originalMethodPointer).First();
VoidDelegate originalDelegate = null;
void TaskMoveNextPatch(IntPtr taskPtr, IntPtr nativeMethodInfo)
{
var avatarManager = *(IntPtr *)(taskPtr + fieldOffset - 16);
using (new AvatarManagerCookie(new VRCAvatarManager(avatarManager)))
originalDelegate(taskPtr, nativeMethodInfo);
}
var patchDelegate = new VoidDelegate(TaskMoveNextPatch);
NativePatchUtils.NativePatch(originalMethodPointer, out originalDelegate, patchDelegate);
}
}
ReaderPatches.ApplyPatches();
SceneManager.add_sceneLoaded(new Action <Scene, LoadSceneMode>((s, _) =>
{
if (s.buildIndex == -1)
{
CanReadAudioMixers = false;
CanReadBadFloats = false;
MelonDebug.Msg("No reading audio mixers anymore");
}
}));
SceneManager.add_sceneUnloaded(new Action <Scene>(s =>
{
if (s.buildIndex == -1)
{
// allow loading mixers from world assetbundles
CanReadAudioMixers = true;
CanReadBadFloats = true;
MelonDebug.Msg("Can read audio mixers now");
}
}));
PortalHiding.OnApplicationStart();
AvatarHiding.OnApplicationStart(HarmonyInstance);
FinalIkPatches.ApplyPatches(HarmonyInstance);
if (MelonHandler.Mods.Any(it => it.Info.Name == "UI Expansion Kit"))
{
typeof(UiExpansionKitSupport).GetMethod(nameof(UiExpansionKitSupport.OnApplicationStart), BindingFlags.Static | BindingFlags.Public) !.Invoke(null, new object[0]);
}
}