Core: Fix concurrent modification of single-threaded dict

Author: SamboyCoding

Cpp2IL.Core/Utils/AsmResolver/AsmResolverUtils.cs

@@ -13,8 +13,8 @@ namespace Cpp2IL.Core.Utils.AsmResolver;
 
 public static class AsmResolverUtils
 {
- private static readonly Dictionary<string, TypeDefinition?> CachedTypeDefsByName = new();
- private static readonly Dictionary<string, TypeSignature?> CachedTypeSignaturesByName = new();
+ private static readonly ConcurrentDictionary<string, TypeDefinition?> CachedTypeDefsByName = new();
+ private static readonly ConcurrentDictionary<string, TypeSignature?> CachedTypeSignaturesByName = new();
  private static readonly ConcurrentDictionary<AssemblyDefinition, ReferenceImporter> ImportersByAssembly = new();
 
  public static readonly ConcurrentDictionary<long, TypeDefinition> TypeDefsByIndex = new();
@@ -222,7 +222,13 @@ public static ITypeDefOrRef ImportReferenceFromIl2CppType(ModuleDefinition modul
  && string.Equals(t.Definition.FullName.Replace('/', '.'), name, StringComparison.OrdinalIgnoreCase);
  });
 
- return definedType?.GetExtraData<TypeDefinition>("AsmResolverType");
+ ret = definedType?.GetExtraData<TypeDefinition>("AsmResolverType");
+ 
+ if (ret == null)
+ return null;
+ 
+ CachedTypeDefsByName.TryAdd(key, ret);
+ return ret;
  }
 
  public static TypeSignature? TryLookupTypeSignatureByName(string? name, ReadOnlySpan<string> genericParameterNames = default)
@@ -238,7 +244,7 @@ public static ITypeDefOrRef ImportReferenceFromIl2CppType(ModuleDefinition modul
  var result = InternalTryLookupTypeSignatureByName(name, genericParameterNames);
 
  if (genericParameterNames.Length == 0)
- CachedTypeSignaturesByName[key] = result;
+ CachedTypeSignaturesByName.TryAdd(key, result);
 
  return result;
  }