929 lines
41 KiB
C#
929 lines
41 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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namespace zzzUnity.Burst.CodeGen
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{
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/// <summary>
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/// Main class for post processing assemblies. The post processing is currently performing:
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/// - Replace C# call from C# to Burst functions with attributes [BurstCompile] to a call to the compiled Burst function
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/// In both editor and standalone scenarios. For DOTS Runtime, this is done differently at BclApp level by patching
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/// DllImport.
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/// - Replace calls to `SharedStatic.GetOrCreate` with `SharedStatic.GetOrCreateUnsafe`, and calculate the hashes during ILPP time
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/// rather than in static constructors at runtime.
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/// </summary>
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internal class ILPostProcessing
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{
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private AssemblyDefinition _burstAssembly;
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private MethodReference _burstCompilerIsEnabledMethodDefinition;
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private MethodReference _burstCompilerCompileFunctionPointer;
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private FieldReference _burstCompilerOptionsField;
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private TypeReference _burstCompilerOptionsType;
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private TypeReference _functionPointerType;
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private MethodReference _functionPointerGetValue;
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private MethodReference _burstDiscardAttributeConstructor;
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private TypeSystem _typeSystem;
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private TypeReference _systemDelegateType;
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private TypeReference _systemASyncCallbackType;
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private TypeReference _systemIASyncResultType;
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private AssemblyDefinition _assemblyDefinition;
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private bool _modified;
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#if !UNITY_DOTSPLAYER
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private bool _containsDirectCall;
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#endif
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private readonly StringBuilder _builder = new StringBuilder(1024);
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private readonly List<Instruction> _instructionsToReplace = new List<Instruction>(4);
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public const string PostfixManaged = "$BurstManaged";
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private const string PostfixBurstDirectCall = "$BurstDirectCall";
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private const string PostfixBurstDelegate = "$PostfixBurstDelegate";
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private const string GetFunctionPointerName = "GetFunctionPointer";
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private const string GetFunctionPointerDiscardName = "GetFunctionPointerDiscard";
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private const string InvokeName = "Invoke";
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public ILPostProcessing(AssemblyResolver loader, bool isForEditor, ErrorDiagnosticDelegate error, LogDelegate log = null, int logLevel = 0, bool skipInitializeOnLoad = false)
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{
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_skipInitializeOnLoad = skipInitializeOnLoad;
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Loader = loader;
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IsForEditor = isForEditor;
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}
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public bool _skipInitializeOnLoad;
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public bool IsForEditor { get; private set; }
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private AssemblyResolver Loader { get; }
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public bool Run(AssemblyDefinition assemblyDefinition)
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{
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_assemblyDefinition = assemblyDefinition;
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_typeSystem = assemblyDefinition.MainModule.TypeSystem;
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_modified = false;
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var types = assemblyDefinition.MainModule.GetTypes().ToArray();
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foreach (var type in types)
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{
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ProcessType(type);
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}
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#if !UNITY_DOTSPLAYER
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if (_containsDirectCall)
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{
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GenerateInitializeOnLoadMethod();
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}
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#endif
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return _modified;
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}
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private void GenerateInitializeOnLoadMethod()
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{
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// This method is needed to ensure that BurstCompiler.Options is initialized on the main thread,
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// before any direct call methods are called on a background thread.
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// [UnityEngine.RuntimeInitializeOnLoadMethod(UnityEngine.RuntimeInitializeLoadType.AfterAssembliesLoaded)]
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// [UnityEditor.InitializeOnLoadMethod] // When its an editor assembly
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// private static void Initialize()
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// {
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// var _ = BurstCompiler.Options;
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// }
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const string initializeOnLoadClassName = "$BurstDirectCallInitializer";
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var initializeOnLoadClass = _assemblyDefinition.MainModule.Types.FirstOrDefault(x => x.Name == initializeOnLoadClassName);
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if (initializeOnLoadClass != null)
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{
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// If there's already a class with this name, remove it,
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// This would mean that we're postprocessing an already-postprocessed assembly;
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// I don't think that ever happens, but no sense in breaking if it does.
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_assemblyDefinition.MainModule.Types.Remove(initializeOnLoadClass);
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}
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initializeOnLoadClass = new TypeDefinition(
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"",
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initializeOnLoadClassName,
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TypeAttributes.NotPublic |
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TypeAttributes.AutoLayout |
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TypeAttributes.AnsiClass |
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TypeAttributes.Abstract |
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TypeAttributes.Sealed |
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TypeAttributes.BeforeFieldInit)
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{
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BaseType = _typeSystem.Object
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};
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_assemblyDefinition.MainModule.Types.Add(initializeOnLoadClass);
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var initializeOnLoadMethod = new MethodDefinition("Initialize", MethodAttributes.Private | MethodAttributes.HideBySig | MethodAttributes.Static, _typeSystem.Void)
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{
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ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed,
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DeclaringType = initializeOnLoadClass
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};
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initializeOnLoadMethod.Body.Variables.Add(new VariableDefinition(_burstCompilerOptionsType));
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var processor = initializeOnLoadMethod.Body.GetILProcessor();
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processor.Emit(OpCodes.Ldsfld, _burstCompilerOptionsField);
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processor.Emit(OpCodes.Stloc_0);
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processor.Emit(OpCodes.Ret);
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initializeOnLoadClass.Methods.Add(FixDebugInformation(initializeOnLoadMethod));
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var attribute = new CustomAttribute(_unityEngineInitializeOnLoadAttributeCtor);
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attribute.ConstructorArguments.Add(new CustomAttributeArgument(_unityEngineRuntimeInitializeLoadType, _unityEngineRuntimeInitializeLoadAfterAssemblies.Constant));
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initializeOnLoadMethod.CustomAttributes.Add(attribute);
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if (IsForEditor && !_skipInitializeOnLoad)
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{
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// Need to ensure the editor tag for initialize on load is present, otherwise edit mode tests will not call Initialize
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attribute = new CustomAttribute(_unityEditorInitilizeOnLoadAttributeCtor);
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initializeOnLoadMethod.CustomAttributes.Add(attribute);
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}
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}
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private static bool CanComputeCompileTimeHash(TypeReference typeRef)
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{
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if (typeRef.ContainsGenericParameter)
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{
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return false;
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}
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var assemblyNameReference = typeRef.Scope as AssemblyNameReference ?? typeRef.Module.Assembly?.Name;
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if (assemblyNameReference == null)
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{
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return false;
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}
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switch (assemblyNameReference.Name)
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{
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case "netstandard":
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case "mscorlib":
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return false;
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}
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return true;
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}
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private void ProcessType(TypeDefinition type)
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{
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if (!type.HasGenericParameters && TryGetBurstCompileAttribute(type, out _))
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{
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// Make a copy because we are going to modify it
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var methodCount = type.Methods.Count;
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for (var j = 0; j < methodCount; j++)
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{
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var method = type.Methods[j];
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if (!method.IsStatic || method.HasGenericParameters || !TryGetBurstCompileAttribute(method, out var methodBurstCompileAttribute)) continue;
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bool isDirectCallDisabled = false;
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bool foundProperty = false;
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if (methodBurstCompileAttribute.HasProperties)
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{
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foreach (var property in methodBurstCompileAttribute.Properties)
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{
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if (property.Name == "DisableDirectCall")
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{
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isDirectCallDisabled = (bool)property.Argument.Value;
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foundProperty = true;
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break;
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}
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}
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}
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// If the method doesn't have a direct call specified, try the assembly level, do one last check for any assembly level [BurstCompile] instead.
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if (foundProperty == false && TryGetBurstCompileAttribute(method.Module.Assembly, out var assemblyBurstCompileAttribute))
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{
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if (assemblyBurstCompileAttribute.HasProperties)
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{
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foreach (var property in assemblyBurstCompileAttribute.Properties)
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{
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if (property.Name == "DisableDirectCall")
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{
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isDirectCallDisabled = (bool)property.Argument.Value;
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break;
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}
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}
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}
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}
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#if !UNITY_DOTSPLAYER // Direct call is not Supported for dots runtime via this pre-processor, its handled elsewhere, this code assumes a Unity Editor based burst
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if (!isDirectCallDisabled)
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{
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if (_burstAssembly == null)
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{
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var resolved = methodBurstCompileAttribute.Constructor.DeclaringType.Resolve();
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InitializeBurstAssembly(resolved.Module.Assembly);
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}
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ProcessMethodForDirectCall(method);
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_modified = true;
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_containsDirectCall = true;
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}
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#endif
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}
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}
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if (TypeHasSharedStaticInIt(type))
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{
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foreach (var method in type.Methods)
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{
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// Skip anything that isn't the static constructor.
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if (method.Name != ".cctor")
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{
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continue;
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}
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try
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{
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#if DEBUG
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if (_instructionsToReplace.Count != 0)
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{
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throw new InvalidOperationException("Instructions to replace wasn't cleared properly!");
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}
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#endif
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foreach (var instruction in method.Body.Instructions)
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{
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// Skip anything that isn't a call.
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if (instruction.OpCode != OpCodes.Call)
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{
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continue;
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}
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var calledMethod = (MethodReference)instruction.Operand;
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if (calledMethod.Name != "GetOrCreate")
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{
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continue;
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}
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// Skip anything that isn't member of the `SharedStatic` class.
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if (!TypeIsSharedStatic(calledMethod.DeclaringType))
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{
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continue;
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}
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// We only handle the `GetOrCreate` calls with a single parameter (the alignment).
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if (calledMethod.Parameters.Count != 1)
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{
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continue;
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}
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// We only post-process the generic versions of `GetOrCreate`.
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if (!(calledMethod is GenericInstanceMethod genericInstanceMethod))
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{
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continue;
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}
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var atLeastOneArgumentCanBeComputed = false;
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foreach (var genericArgument in genericInstanceMethod.GenericArguments)
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{
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if (CanComputeCompileTimeHash(genericArgument))
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{
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atLeastOneArgumentCanBeComputed = true;
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}
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}
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// We cannot post-process a shared static with all arguments being open generic.
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// We cannot post-process a shared static where all of its types are in core libraries.
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if (!atLeastOneArgumentCanBeComputed)
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{
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continue;
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}
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_instructionsToReplace.Add(instruction);
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}
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if (_instructionsToReplace.Count > 0)
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{
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_modified = true;
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}
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foreach (var instruction in _instructionsToReplace)
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{
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var calledMethod = (GenericInstanceMethod)instruction.Operand;
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var hashCode64 = CalculateHashCode64(calledMethod.GenericArguments[0]);
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long subHashCode64 = 0;
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var useCalculatedHashCode = true;
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var useCalculatedSubHashCode = true;
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if (calledMethod.GenericArguments.Count == 2)
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{
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subHashCode64 = CalculateHashCode64(calledMethod.GenericArguments[1]);
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useCalculatedHashCode = CanComputeCompileTimeHash(calledMethod.GenericArguments[0]);
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useCalculatedSubHashCode = CanComputeCompileTimeHash(calledMethod.GenericArguments[1]);
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}
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#if DEBUG
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if (!useCalculatedHashCode && !useCalculatedSubHashCode)
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{
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throw new InvalidOperationException("Cannot replace when both hashes are invalid!");
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}
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#endif
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var methodToCall = "GetOrCreateUnsafe";
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TypeReference genericArgument = null;
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if (!useCalculatedHashCode)
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{
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methodToCall = "GetOrCreatePartiallyUnsafeWithSubHashCode";
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genericArgument = calledMethod.GenericArguments[0];
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}
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else if (!useCalculatedSubHashCode)
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{
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methodToCall = "GetOrCreatePartiallyUnsafeWithHashCode";
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genericArgument = calledMethod.GenericArguments[1];
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}
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var getOrCreateUnsafe = _assemblyDefinition.MainModule.ImportReference(
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calledMethod.DeclaringType.Resolve().Methods.First(m => m.Name == methodToCall));
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getOrCreateUnsafe.DeclaringType = calledMethod.DeclaringType;
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if (genericArgument != null)
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{
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var genericInstanceMethod = new GenericInstanceMethod(getOrCreateUnsafe);
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genericInstanceMethod.GenericArguments.Add(genericArgument);
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getOrCreateUnsafe = genericInstanceMethod;
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}
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var processor = method.Body.GetILProcessor();
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if (useCalculatedHashCode)
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{
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processor.InsertBefore(instruction, processor.Create(OpCodes.Ldc_I8, hashCode64));
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}
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if (useCalculatedSubHashCode)
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{
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processor.InsertBefore(instruction, processor.Create(OpCodes.Ldc_I8, subHashCode64));
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}
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processor.Replace(instruction, processor.Create(OpCodes.Call, getOrCreateUnsafe));
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}
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}
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finally
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{
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_instructionsToReplace.Clear();
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}
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}
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}
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}
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// WARNING: This **must** be kept in sync with the definition in BurstRuntime.cs!
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||
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private static long HashStringWithFNV1A64(string text)
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||
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{
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||
|
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// Using http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-1a
|
||
|
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// with basis and prime:
|
||
|
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const ulong offsetBasis = 14695981039346656037;
|
||
|
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const ulong prime = 1099511628211;
|
||
|
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||
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ulong result = offsetBasis;
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||
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foreach (var c in text)
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||
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{
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result = prime * (result ^ (byte)(c & 255));
|
||
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result = prime * (result ^ (byte)(c >> 8));
|
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}
|
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|
return (long)result;
|
||
|
|
}
|
||
|
|
|
||
|
|
private long CalculateHashCode64(TypeReference type)
|
||
|
|
{
|
||
|
|
try
|
||
|
|
{
|
||
|
|
#if DEBUG
|
||
|
|
if (_builder.Length != 0)
|
||
|
|
{
|
||
|
|
throw new InvalidOperationException("StringBuilder wasn't cleared properly!");
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
type.BuildAssemblyQualifiedName(_builder);
|
||
|
|
return HashStringWithFNV1A64(_builder.ToString());
|
||
|
|
}
|
||
|
|
finally
|
||
|
|
{
|
||
|
|
_builder.Clear();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static bool TypeIsSharedStatic(TypeReference typeRef)
|
||
|
|
{
|
||
|
|
if (typeRef.Namespace != "Unity.Burst")
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeRef.Name != "SharedStatic`1")
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static bool TypeHasSharedStaticInIt(TypeDefinition typeDef)
|
||
|
|
{
|
||
|
|
foreach (var field in typeDef.Fields)
|
||
|
|
{
|
||
|
|
if (TypeIsSharedStatic(field.FieldType))
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
private TypeDefinition InjectDelegate(TypeDefinition declaringType, string originalName, MethodDefinition managed, string uniqueSuffix)
|
||
|
|
{
|
||
|
|
var injectedDelegateType = new TypeDefinition(declaringType.Namespace, $"{originalName}{uniqueSuffix}{PostfixBurstDelegate}",
|
||
|
|
TypeAttributes.NestedPublic |
|
||
|
|
TypeAttributes.AutoLayout |
|
||
|
|
TypeAttributes.AnsiClass |
|
||
|
|
TypeAttributes.Sealed
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DeclaringType = declaringType,
|
||
|
|
BaseType = _systemDelegateType
|
||
|
|
};
|
||
|
|
|
||
|
|
declaringType.NestedTypes.Add(injectedDelegateType);
|
||
|
|
|
||
|
|
{
|
||
|
|
var constructor = new MethodDefinition(".ctor",
|
||
|
|
MethodAttributes.Public |
|
||
|
|
MethodAttributes.HideBySig |
|
||
|
|
MethodAttributes.SpecialName |
|
||
|
|
MethodAttributes.RTSpecialName,
|
||
|
|
_typeSystem.Void)
|
||
|
|
{
|
||
|
|
HasThis = true,
|
||
|
|
IsManaged = true,
|
||
|
|
IsRuntime = true,
|
||
|
|
DeclaringType = injectedDelegateType
|
||
|
|
};
|
||
|
|
|
||
|
|
constructor.Parameters.Add(new ParameterDefinition(_typeSystem.Object));
|
||
|
|
constructor.Parameters.Add(new ParameterDefinition(_typeSystem.IntPtr));
|
||
|
|
injectedDelegateType.Methods.Add(constructor);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
var invoke = new MethodDefinition("Invoke",
|
||
|
|
MethodAttributes.Public |
|
||
|
|
MethodAttributes.HideBySig |
|
||
|
|
MethodAttributes.NewSlot |
|
||
|
|
MethodAttributes.Virtual,
|
||
|
|
managed.ReturnType)
|
||
|
|
{
|
||
|
|
HasThis = true,
|
||
|
|
IsManaged = true,
|
||
|
|
IsRuntime = true,
|
||
|
|
DeclaringType = injectedDelegateType
|
||
|
|
};
|
||
|
|
|
||
|
|
foreach (var parameter in managed.Parameters)
|
||
|
|
{
|
||
|
|
invoke.Parameters.Add(parameter);
|
||
|
|
}
|
||
|
|
|
||
|
|
injectedDelegateType.Methods.Add(invoke);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
var beginInvoke = new MethodDefinition("BeginInvoke",
|
||
|
|
MethodAttributes.Public |
|
||
|
|
MethodAttributes.HideBySig |
|
||
|
|
MethodAttributes.NewSlot |
|
||
|
|
MethodAttributes.Virtual,
|
||
|
|
_systemIASyncResultType)
|
||
|
|
{
|
||
|
|
HasThis = true,
|
||
|
|
IsManaged = true,
|
||
|
|
IsRuntime = true,
|
||
|
|
DeclaringType = injectedDelegateType
|
||
|
|
};
|
||
|
|
|
||
|
|
foreach (var parameter in managed.Parameters)
|
||
|
|
{
|
||
|
|
beginInvoke.Parameters.Add(parameter);
|
||
|
|
}
|
||
|
|
|
||
|
|
beginInvoke.Parameters.Add(new ParameterDefinition(_systemASyncCallbackType));
|
||
|
|
beginInvoke.Parameters.Add(new ParameterDefinition(_typeSystem.Object));
|
||
|
|
|
||
|
|
injectedDelegateType.Methods.Add(beginInvoke);
|
||
|
|
}
|
||
|
|
|
||
|
|
{
|
||
|
|
var endInvoke = new MethodDefinition("EndInvoke",
|
||
|
|
MethodAttributes.Public |
|
||
|
|
MethodAttributes.HideBySig |
|
||
|
|
MethodAttributes.NewSlot |
|
||
|
|
MethodAttributes.Virtual,
|
||
|
|
managed.ReturnType)
|
||
|
|
{
|
||
|
|
HasThis = true,
|
||
|
|
IsManaged = true,
|
||
|
|
IsRuntime = true,
|
||
|
|
DeclaringType = injectedDelegateType
|
||
|
|
};
|
||
|
|
|
||
|
|
endInvoke.Parameters.Add(new ParameterDefinition(_systemIASyncResultType));
|
||
|
|
|
||
|
|
injectedDelegateType.Methods.Add(endInvoke);
|
||
|
|
}
|
||
|
|
|
||
|
|
return injectedDelegateType;
|
||
|
|
}
|
||
|
|
|
||
|
|
private MethodDefinition CreateGetFunctionPointerDiscardMethod(TypeDefinition cls, FieldDefinition pointerField, MethodDefinition targetMethod, TypeDefinition injectedDelegate)
|
||
|
|
{
|
||
|
|
var genericCompileFunctionPointer = new GenericInstanceMethod(_burstCompilerCompileFunctionPointer);
|
||
|
|
genericCompileFunctionPointer.GenericArguments.Add(injectedDelegate);
|
||
|
|
|
||
|
|
var genericFunctionPointerType = new GenericInstanceType(_functionPointerType);
|
||
|
|
genericFunctionPointerType.GenericArguments.Add(injectedDelegate);
|
||
|
|
|
||
|
|
var genericGetValue = new MethodReference(_functionPointerGetValue.Name, _functionPointerGetValue.ReturnType, genericFunctionPointerType);
|
||
|
|
|
||
|
|
foreach (var p in _functionPointerGetValue.Parameters)
|
||
|
|
{
|
||
|
|
genericGetValue.Parameters.Add(new ParameterDefinition(p.Name, p.Attributes, p.ParameterType));
|
||
|
|
}
|
||
|
|
|
||
|
|
genericGetValue.HasThis = _functionPointerGetValue.HasThis;
|
||
|
|
genericGetValue.MetadataToken = _functionPointerGetValue.MetadataToken;
|
||
|
|
|
||
|
|
/*var genericGetValue = new Mono.Cecil.GenericInstanceMethod(_functionPointerGetValue)
|
||
|
|
{
|
||
|
|
DeclaringType = genericFunctionPointerType
|
||
|
|
};*/
|
||
|
|
|
||
|
|
// Create GetFunctionPointerDiscard method:
|
||
|
|
//
|
||
|
|
// [BurstDiscard]
|
||
|
|
// public static void GetFunctionPointerDiscard(ref IntPtr ptr) {
|
||
|
|
// if (Pointer == null) {
|
||
|
|
// Pointer = BurstCompiler.CompileFunctionPointer<InjectedDelegate>(d);
|
||
|
|
// }
|
||
|
|
//
|
||
|
|
// ptr = Pointer
|
||
|
|
// }
|
||
|
|
var getFunctionPointerDiscardMethod = new MethodDefinition(GetFunctionPointerDiscardName, MethodAttributes.Private | MethodAttributes.HideBySig | MethodAttributes.Static, _typeSystem.Void)
|
||
|
|
{
|
||
|
|
ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed,
|
||
|
|
DeclaringType = cls
|
||
|
|
};
|
||
|
|
|
||
|
|
getFunctionPointerDiscardMethod.Body.Variables.Add(new VariableDefinition(genericFunctionPointerType));
|
||
|
|
|
||
|
|
getFunctionPointerDiscardMethod.Parameters.Add(new ParameterDefinition(new ByReferenceType(_typeSystem.IntPtr)));
|
||
|
|
|
||
|
|
var processor = getFunctionPointerDiscardMethod.Body.GetILProcessor();
|
||
|
|
processor.Emit(OpCodes.Ldsfld, pointerField);
|
||
|
|
var branchPosition = processor.Body.Instructions[processor.Body.Instructions.Count - 1];
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Ldnull);
|
||
|
|
processor.Emit(OpCodes.Ldftn, targetMethod);
|
||
|
|
processor.Emit(OpCodes.Newobj, injectedDelegate.Methods.First(md => md.IsConstructor && md.Parameters.Count == 2));
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Call, genericCompileFunctionPointer);
|
||
|
|
processor.Emit(OpCodes.Stloc_0);
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Ldloca, 0);
|
||
|
|
processor.Emit(OpCodes.Call, genericGetValue);
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Stsfld, pointerField);
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Ldarg_0);
|
||
|
|
processor.InsertAfter(branchPosition, Instruction.Create(OpCodes.Brtrue, processor.Body.Instructions[processor.Body.Instructions.Count - 1]));
|
||
|
|
processor.Emit(OpCodes.Ldsfld, pointerField);
|
||
|
|
processor.Emit(OpCodes.Stind_I);
|
||
|
|
processor.Emit(OpCodes.Ret);
|
||
|
|
|
||
|
|
cls.Methods.Add(FixDebugInformation(getFunctionPointerDiscardMethod));
|
||
|
|
|
||
|
|
getFunctionPointerDiscardMethod.CustomAttributes.Add(new CustomAttribute(_burstDiscardAttributeConstructor));
|
||
|
|
|
||
|
|
return getFunctionPointerDiscardMethod;
|
||
|
|
}
|
||
|
|
|
||
|
|
private MethodDefinition CreateGetFunctionPointerMethod(TypeDefinition cls, MethodDefinition getFunctionPointerDiscardMethod)
|
||
|
|
{
|
||
|
|
// Create GetFunctionPointer method:
|
||
|
|
//
|
||
|
|
// public static IntPtr GetFunctionPointer() {
|
||
|
|
// var ptr;
|
||
|
|
// GetFunctionPointerDiscard(ref ptr);
|
||
|
|
// return ptr;
|
||
|
|
// }
|
||
|
|
var getFunctionPointerMethod = new MethodDefinition(GetFunctionPointerName, MethodAttributes.Private | MethodAttributes.HideBySig | MethodAttributes.Static, _typeSystem.IntPtr)
|
||
|
|
{
|
||
|
|
ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed,
|
||
|
|
DeclaringType = cls
|
||
|
|
};
|
||
|
|
|
||
|
|
getFunctionPointerMethod.Body.Variables.Add(new VariableDefinition(_typeSystem.IntPtr));
|
||
|
|
getFunctionPointerMethod.Body.InitLocals = true;
|
||
|
|
|
||
|
|
var processor = getFunctionPointerMethod.Body.GetILProcessor();
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Ldc_I4_0);
|
||
|
|
processor.Emit(OpCodes.Conv_I);
|
||
|
|
processor.Emit(OpCodes.Stloc_0);
|
||
|
|
processor.Emit(OpCodes.Ldloca_S, (byte)0);
|
||
|
|
processor.Emit(OpCodes.Call, getFunctionPointerDiscardMethod);
|
||
|
|
processor.Emit(OpCodes.Ldloc_0);
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Ret);
|
||
|
|
|
||
|
|
cls.Methods.Add(FixDebugInformation(getFunctionPointerMethod));
|
||
|
|
|
||
|
|
return getFunctionPointerMethod;
|
||
|
|
}
|
||
|
|
|
||
|
|
private void ProcessMethodForDirectCall(MethodDefinition burstCompileMethod)
|
||
|
|
{
|
||
|
|
var declaringType = burstCompileMethod.DeclaringType;
|
||
|
|
|
||
|
|
var uniqueSuffix = $"_{burstCompileMethod.MetadataToken.RID:X8}";
|
||
|
|
|
||
|
|
var injectedDelegate = InjectDelegate(declaringType, burstCompileMethod.Name, burstCompileMethod, uniqueSuffix);
|
||
|
|
|
||
|
|
// Create a copy of the original method that will be the actual managed method
|
||
|
|
// The original method is patched at the end of this method to call
|
||
|
|
// the dispatcher that will go to the Burst implementation or the managed method (if in the editor and Burst is disabled)
|
||
|
|
var managedFallbackMethod = new MethodDefinition($"{burstCompileMethod.Name}{PostfixManaged}", burstCompileMethod.Attributes, burstCompileMethod.ReturnType)
|
||
|
|
{
|
||
|
|
DeclaringType = declaringType,
|
||
|
|
ImplAttributes = burstCompileMethod.ImplAttributes,
|
||
|
|
MetadataToken = burstCompileMethod.MetadataToken,
|
||
|
|
};
|
||
|
|
|
||
|
|
// Ensure the CustomAttributes are the same
|
||
|
|
managedFallbackMethod.CustomAttributes.Clear();
|
||
|
|
foreach (var attr in burstCompileMethod.CustomAttributes)
|
||
|
|
{
|
||
|
|
managedFallbackMethod.CustomAttributes.Add(attr);
|
||
|
|
}
|
||
|
|
|
||
|
|
declaringType.Methods.Add(managedFallbackMethod);
|
||
|
|
|
||
|
|
foreach (var parameter in burstCompileMethod.Parameters)
|
||
|
|
{
|
||
|
|
managedFallbackMethod.Parameters.Add(parameter);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Copy the body from the original burst method to the managed fallback, we'll replace the burstCompileMethod body later.
|
||
|
|
managedFallbackMethod.Body.InitLocals = burstCompileMethod.Body.InitLocals;
|
||
|
|
managedFallbackMethod.Body.LocalVarToken = burstCompileMethod.Body.LocalVarToken;
|
||
|
|
managedFallbackMethod.Body.MaxStackSize = burstCompileMethod.Body.MaxStackSize;
|
||
|
|
|
||
|
|
foreach (var variable in burstCompileMethod.Body.Variables)
|
||
|
|
{
|
||
|
|
managedFallbackMethod.Body.Variables.Add(variable);
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach (var instruction in burstCompileMethod.Body.Instructions)
|
||
|
|
{
|
||
|
|
managedFallbackMethod.Body.Instructions.Add(instruction);
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach (var exceptionHandler in burstCompileMethod.Body.ExceptionHandlers)
|
||
|
|
{
|
||
|
|
managedFallbackMethod.Body.ExceptionHandlers.Add(exceptionHandler);
|
||
|
|
}
|
||
|
|
|
||
|
|
managedFallbackMethod.ImplAttributes &= MethodImplAttributes.NoInlining;
|
||
|
|
// 0x0100 is AggressiveInlining
|
||
|
|
managedFallbackMethod.ImplAttributes |= (MethodImplAttributes)0x0100;
|
||
|
|
|
||
|
|
// The method needs to be public because we query for it in the ILPP code.
|
||
|
|
managedFallbackMethod.Attributes &= ~MethodAttributes.Private;
|
||
|
|
managedFallbackMethod.Attributes |= MethodAttributes.Public;
|
||
|
|
|
||
|
|
// private static class (Name_RID.$Postfix)
|
||
|
|
var cls = new TypeDefinition(declaringType.Namespace, $"{burstCompileMethod.Name}{uniqueSuffix}{PostfixBurstDirectCall}",
|
||
|
|
TypeAttributes.NestedAssembly |
|
||
|
|
TypeAttributes.AutoLayout |
|
||
|
|
TypeAttributes.AnsiClass |
|
||
|
|
TypeAttributes.Abstract |
|
||
|
|
TypeAttributes.Sealed |
|
||
|
|
TypeAttributes.BeforeFieldInit
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DeclaringType = declaringType,
|
||
|
|
BaseType = _typeSystem.Object
|
||
|
|
};
|
||
|
|
|
||
|
|
declaringType.NestedTypes.Add(cls);
|
||
|
|
|
||
|
|
// Create Field:
|
||
|
|
//
|
||
|
|
// private static IntPtr Pointer;
|
||
|
|
var pointerField = new FieldDefinition("Pointer", FieldAttributes.Static | FieldAttributes.Private, _typeSystem.IntPtr)
|
||
|
|
{
|
||
|
|
DeclaringType = cls
|
||
|
|
};
|
||
|
|
cls.Fields.Add(pointerField);
|
||
|
|
|
||
|
|
var getFunctionPointerDiscardMethod = CreateGetFunctionPointerDiscardMethod(
|
||
|
|
cls, pointerField,
|
||
|
|
// In the player the function pointer is looked up in a registry by name
|
||
|
|
// so we can't request a `$BurstManaged` function (because it was never compiled, only the toplevel one)
|
||
|
|
// But, it's safe *in the player* to request the toplevel function
|
||
|
|
IsForEditor ? managedFallbackMethod : burstCompileMethod,
|
||
|
|
injectedDelegate);
|
||
|
|
var getFunctionPointerMethod = CreateGetFunctionPointerMethod(cls, getFunctionPointerDiscardMethod);
|
||
|
|
|
||
|
|
// Create the Invoke method based on the original method (same signature)
|
||
|
|
//
|
||
|
|
// public static XXX Invoke(...args) {
|
||
|
|
// if (BurstCompiler.IsEnabled)
|
||
|
|
// {
|
||
|
|
// var funcPtr = GetFunctionPointer();
|
||
|
|
// if (funcPtr != null) return funcPtr(...args);
|
||
|
|
// }
|
||
|
|
// return OriginalMethod(...args);
|
||
|
|
// }
|
||
|
|
var invokeAttributes = managedFallbackMethod.Attributes;
|
||
|
|
invokeAttributes &= ~MethodAttributes.Private;
|
||
|
|
invokeAttributes |= MethodAttributes.Public;
|
||
|
|
var invoke = new MethodDefinition(InvokeName, invokeAttributes, burstCompileMethod.ReturnType)
|
||
|
|
{
|
||
|
|
ImplAttributes = MethodImplAttributes.IL | MethodImplAttributes.Managed,
|
||
|
|
DeclaringType = cls
|
||
|
|
};
|
||
|
|
|
||
|
|
var signature = new CallSite(burstCompileMethod.ReturnType)
|
||
|
|
{
|
||
|
|
CallingConvention = MethodCallingConvention.C
|
||
|
|
};
|
||
|
|
|
||
|
|
foreach (var parameter in burstCompileMethod.Parameters)
|
||
|
|
{
|
||
|
|
invoke.Parameters.Add(parameter);
|
||
|
|
signature.Parameters.Add(parameter);
|
||
|
|
}
|
||
|
|
|
||
|
|
invoke.Body.Variables.Add(new VariableDefinition(_typeSystem.IntPtr));
|
||
|
|
invoke.Body.InitLocals = true;
|
||
|
|
|
||
|
|
var processor = invoke.Body.GetILProcessor();
|
||
|
|
processor.Emit(OpCodes.Call, _burstCompilerIsEnabledMethodDefinition);
|
||
|
|
var branchPosition0 = processor.Body.Instructions[processor.Body.Instructions.Count - 1];
|
||
|
|
|
||
|
|
processor.Emit(OpCodes.Call, getFunctionPointerMethod);
|
||
|
|
processor.Emit(OpCodes.Stloc_0);
|
||
|
|
processor.Emit(OpCodes.Ldloc_0);
|
||
|
|
var branchPosition1 = processor.Body.Instructions[processor.Body.Instructions.Count - 1];
|
||
|
|
|
||
|
|
EmitArguments(processor, invoke);
|
||
|
|
processor.Emit(OpCodes.Ldloc_0);
|
||
|
|
processor.Emit(OpCodes.Calli, signature);
|
||
|
|
processor.Emit(OpCodes.Ret);
|
||
|
|
var previousRet = processor.Body.Instructions[processor.Body.Instructions.Count - 1];
|
||
|
|
|
||
|
|
EmitArguments(processor, invoke);
|
||
|
|
processor.Emit(OpCodes.Call, managedFallbackMethod);
|
||
|
|
processor.Emit(OpCodes.Ret);
|
||
|
|
|
||
|
|
// Insert the branch once we have emitted the instructions
|
||
|
|
processor.InsertAfter(branchPosition0, Instruction.Create(OpCodes.Brfalse, previousRet.Next));
|
||
|
|
processor.InsertAfter(branchPosition1, Instruction.Create(OpCodes.Brfalse, previousRet.Next));
|
||
|
|
cls.Methods.Add(FixDebugInformation(invoke));
|
||
|
|
|
||
|
|
// Final patching of the original method
|
||
|
|
// public static XXX OriginalMethod(...args) {
|
||
|
|
// Name_RID.$Postfix.Invoke(...args);
|
||
|
|
// ret;
|
||
|
|
// }
|
||
|
|
burstCompileMethod.Body = new MethodBody(burstCompileMethod);
|
||
|
|
processor = burstCompileMethod.Body.GetILProcessor();
|
||
|
|
EmitArguments(processor, burstCompileMethod);
|
||
|
|
processor.Emit(OpCodes.Call, invoke);
|
||
|
|
processor.Emit(OpCodes.Ret);
|
||
|
|
FixDebugInformation(burstCompileMethod);
|
||
|
|
}
|
||
|
|
|
||
|
|
private static MethodDefinition FixDebugInformation(MethodDefinition method)
|
||
|
|
{
|
||
|
|
method.DebugInformation.Scope = new ScopeDebugInformation(method.Body.Instructions.First(), method.Body.Instructions.Last());
|
||
|
|
return method;
|
||
|
|
}
|
||
|
|
|
||
|
|
private AssemblyDefinition GetAsmDefinitionFromFile(AssemblyResolver loader, string assemblyName)
|
||
|
|
{
|
||
|
|
if (loader.TryResolve(AssemblyNameReference.Parse(assemblyName), out var result))
|
||
|
|
{
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
private MethodReference _unityEngineInitializeOnLoadAttributeCtor;
|
||
|
|
private TypeReference _unityEngineRuntimeInitializeLoadType;
|
||
|
|
private FieldDefinition _unityEngineRuntimeInitializeLoadAfterAssemblies;
|
||
|
|
private MethodReference _unityEditorInitilizeOnLoadAttributeCtor;
|
||
|
|
|
||
|
|
private void InitializeBurstAssembly(AssemblyDefinition burstAssembly)
|
||
|
|
{
|
||
|
|
_burstAssembly = burstAssembly;
|
||
|
|
|
||
|
|
var burstCompilerTypeDefinition = burstAssembly.MainModule.GetType("Unity.Burst", "BurstCompiler");
|
||
|
|
_burstCompilerIsEnabledMethodDefinition = _assemblyDefinition.MainModule.ImportReference(burstCompilerTypeDefinition.Methods.FirstOrDefault(x => x.Name == "get_IsEnabled"));
|
||
|
|
_burstCompilerCompileFunctionPointer = _assemblyDefinition.MainModule.ImportReference(burstCompilerTypeDefinition.Methods.FirstOrDefault(x => x.Name == "CompileFunctionPointer"));
|
||
|
|
_burstCompilerOptionsField = _assemblyDefinition.MainModule.ImportReference(burstCompilerTypeDefinition.Fields.FirstOrDefault(x => x.Name == "Options"));
|
||
|
|
_burstCompilerOptionsType = _assemblyDefinition.MainModule.ImportReference(burstAssembly.MainModule.GetType("Unity.Burst", "BurstCompilerOptions"));
|
||
|
|
|
||
|
|
var functionPointerTypeDefinition = burstAssembly.MainModule.GetType("Unity.Burst", "FunctionPointer`1");
|
||
|
|
_functionPointerType = _assemblyDefinition.MainModule.ImportReference(functionPointerTypeDefinition);
|
||
|
|
_functionPointerGetValue = _assemblyDefinition.MainModule.ImportReference(functionPointerTypeDefinition.Methods.FirstOrDefault(x => x.Name == "get_Value"));
|
||
|
|
|
||
|
|
var corLibrary = Loader.Resolve((AssemblyNameReference)_typeSystem.CoreLibrary);
|
||
|
|
_systemDelegateType = _assemblyDefinition.MainModule.ImportReference(corLibrary.MainModule.GetType("System.MulticastDelegate"));
|
||
|
|
_systemASyncCallbackType = _assemblyDefinition.MainModule.ImportReference(corLibrary.MainModule.GetType("System.AsyncCallback"));
|
||
|
|
_systemIASyncResultType = _assemblyDefinition.MainModule.ImportReference(corLibrary.MainModule.GetType("System.IAsyncResult"));
|
||
|
|
|
||
|
|
var asmDef = GetAsmDefinitionFromFile(Loader, "UnityEngine.CoreModule");
|
||
|
|
var runtimeInitializeOnLoadMethodAttribute = asmDef.MainModule.GetType("UnityEngine", "RuntimeInitializeOnLoadMethodAttribute");
|
||
|
|
var runtimeInitializeLoadType = asmDef.MainModule.GetType("UnityEngine", "RuntimeInitializeLoadType");
|
||
|
|
|
||
|
|
var burstDiscardType = asmDef.MainModule.GetType("Unity.Burst", "BurstDiscardAttribute");
|
||
|
|
_burstDiscardAttributeConstructor = _assemblyDefinition.MainModule.ImportReference(burstDiscardType.Methods.First(method => method.Name == ".ctor"));
|
||
|
|
|
||
|
|
_unityEngineInitializeOnLoadAttributeCtor = _assemblyDefinition.MainModule.ImportReference(runtimeInitializeOnLoadMethodAttribute.Methods.FirstOrDefault(x => x.Name == ".ctor" && x.HasParameters));
|
||
|
|
_unityEngineRuntimeInitializeLoadType = _assemblyDefinition.MainModule.ImportReference(runtimeInitializeLoadType);
|
||
|
|
_unityEngineRuntimeInitializeLoadAfterAssemblies = runtimeInitializeLoadType.Fields.FirstOrDefault(x => x.Name == "AfterAssembliesLoaded");
|
||
|
|
|
||
|
|
if (IsForEditor && !_skipInitializeOnLoad)
|
||
|
|
{
|
||
|
|
asmDef = GetAsmDefinitionFromFile(Loader, "UnityEditor.CoreModule");
|
||
|
|
if (asmDef == null)
|
||
|
|
asmDef = GetAsmDefinitionFromFile(Loader, "UnityEditor");
|
||
|
|
var initializeOnLoadMethodAttribute = asmDef.MainModule.GetType("UnityEditor", "InitializeOnLoadMethodAttribute");
|
||
|
|
|
||
|
|
_unityEditorInitilizeOnLoadAttributeCtor = _assemblyDefinition.MainModule.ImportReference(initializeOnLoadMethodAttribute.Methods.FirstOrDefault(x => x.Name == ".ctor" && !x.HasParameters));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void EmitArguments(ILProcessor processor, MethodDefinition method)
|
||
|
|
{
|
||
|
|
for (var i = 0; i < method.Parameters.Count; i++)
|
||
|
|
{
|
||
|
|
switch (i)
|
||
|
|
{
|
||
|
|
case 0:
|
||
|
|
processor.Emit(OpCodes.Ldarg_0);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
processor.Emit(OpCodes.Ldarg_1);
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
processor.Emit(OpCodes.Ldarg_2);
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
processor.Emit(OpCodes.Ldarg_3);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (i <= 255)
|
||
|
|
{
|
||
|
|
processor.Emit(OpCodes.Ldarg_S, (byte)i);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
processor.Emit(OpCodes.Ldarg, i);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static bool TryGetBurstCompileAttribute(ICustomAttributeProvider provider, out CustomAttribute customAttribute)
|
||
|
|
{
|
||
|
|
if (provider.HasCustomAttributes)
|
||
|
|
{
|
||
|
|
foreach (var customAttr in provider.CustomAttributes)
|
||
|
|
{
|
||
|
|
if (customAttr.Constructor.DeclaringType.Name == "BurstCompileAttribute")
|
||
|
|
{
|
||
|
|
customAttribute = customAttr;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
customAttribute = null;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|