111 lines
4.5 KiB
C#
111 lines
4.5 KiB
C#
// Copyright 2025 Code Philosophy
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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using dnlib.DotNet;
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using System.Collections.Generic;
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namespace Obfuz.Utils
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{
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public class BurstCompileComputeCache
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{
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private readonly List<ModuleDef> _modulesToObfuscate;
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private readonly List<ModuleDef> _allObfuscationRelativeModules;
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private readonly HashSet<MethodDef> _burstCompileMethods = new HashSet<MethodDef>();
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private readonly HashSet<MethodDef> _burstCompileRelativeMethods = new HashSet<MethodDef>();
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public BurstCompileComputeCache(List<ModuleDef> modulesToObfuscate, List<ModuleDef> allObfuscationRelativeModules)
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{
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_modulesToObfuscate = modulesToObfuscate;
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_allObfuscationRelativeModules = allObfuscationRelativeModules;
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Build();
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}
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private void BuildBurstCompileMethods()
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{
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foreach (var module in _allObfuscationRelativeModules)
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{
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foreach (var type in module.GetTypes())
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{
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bool hasBurstCompileAttribute = MetaUtil.HasBurstCompileAttribute(type);
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foreach (var method in type.Methods)
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{
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if (hasBurstCompileAttribute || MetaUtil.HasBurstCompileAttribute(method))
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{
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_burstCompileMethods.Add(method);
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}
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}
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}
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}
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}
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private void CollectBurstCompileReferencedMethods()
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{
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var modulesToObfuscateSet = new HashSet<ModuleDef>(_modulesToObfuscate);
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var allObfuscationRelativeModulesSet = new HashSet<ModuleDef>(_allObfuscationRelativeModules);
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var pendingWalking = new Queue<MethodDef>(_burstCompileMethods);
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var visitedMethods = new HashSet<MethodDef>();
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while (pendingWalking.Count > 0)
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{
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var method = pendingWalking.Dequeue();
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if (!visitedMethods.Add(method))
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{
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continue; // Skip already visited methods
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}
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if (modulesToObfuscateSet.Contains(method.Module))
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{
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_burstCompileRelativeMethods.Add(method);
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}
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if (!method.HasBody)
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{
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continue;
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}
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// Check for calls to other methods
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foreach (var instruction in method.Body.Instructions)
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{
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if (instruction.OpCode.Code == dnlib.DotNet.Emit.Code.Call ||
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instruction.OpCode.Code == dnlib.DotNet.Emit.Code.Callvirt)
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{
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MethodDef calledMethod = ((IMethod)instruction.Operand).ResolveMethodDef();
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if (calledMethod == null || !allObfuscationRelativeModulesSet.Contains(calledMethod.Module) || visitedMethods.Contains(calledMethod))
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{
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continue; // Skip if the method could not be resolved
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}
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pendingWalking.Enqueue(calledMethod);
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}
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}
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}
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}
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private void Build()
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{
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BuildBurstCompileMethods();
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CollectBurstCompileReferencedMethods();
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}
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public bool IsBurstCompileMethodOrReferencedByBurstCompileMethod(MethodDef method)
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{
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return _burstCompileRelativeMethods.Contains(method);
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}
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}
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}
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