1 files changed, 89 insertions, 0 deletions
diff --git a/compiler/optimizing/handle_cache.h b/compiler/optimizing/handle_cache.h
new file mode 100644
index 0000000000..56c3331aa9
--- /dev/null
+++ b/compiler/optimizing/handle_cache.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_COMPILER_OPTIMIZING_HANDLE_CACHE_H_
+#define ART_COMPILER_OPTIMIZING_HANDLE_CACHE_H_
+
+#include "base/macros.h"
+#include "class_root.h"
+#include "reference_type_info.h"
+
+namespace art HIDDEN {
+
+class VariableSizedHandleScope;
+
+class HandleCache {
+ public:
+  explicit HandleCache(VariableSizedHandleScope* handles) : handles_(handles) { }
+
+  VariableSizedHandleScope* GetHandles() { return handles_; }
+
+  template <typename T>
+  MutableHandle<T> NewHandle(T* object) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  template <typename T>
+  MutableHandle<T> NewHandle(ObjPtr<T> object) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  ReferenceTypeInfo::TypeHandle GetObjectClassHandle() {
+    return GetRootHandle(ClassRoot::kJavaLangObject, &object_class_handle_);
+  }
+
+  ReferenceTypeInfo::TypeHandle GetClassClassHandle() {
+    return GetRootHandle(ClassRoot::kJavaLangClass, &class_class_handle_);
+  }
+
+  ReferenceTypeInfo::TypeHandle GetMethodHandleClassHandle() {
+    return GetRootHandle(ClassRoot::kJavaLangInvokeMethodHandleImpl, &method_handle_class_handle_);
+  }
+
+  ReferenceTypeInfo::TypeHandle GetMethodTypeClassHandle() {
+    return GetRootHandle(ClassRoot::kJavaLangInvokeMethodType, &method_type_class_handle_);
+  }
+
+  ReferenceTypeInfo::TypeHandle GetStringClassHandle() {
+    return GetRootHandle(ClassRoot::kJavaLangString, &string_class_handle_);
+  }
+
+  ReferenceTypeInfo::TypeHandle GetThrowableClassHandle() {
+    return GetRootHandle(ClassRoot::kJavaLangThrowable, &throwable_class_handle_);
+  }
+
+ private:
+  inline ReferenceTypeInfo::TypeHandle GetRootHandle(ClassRoot class_root,
+                                                     ReferenceTypeInfo::TypeHandle* cache) {
+    if (UNLIKELY(!ReferenceTypeInfo::IsValidHandle(*cache))) {
+      *cache = CreateRootHandle(handles_, class_root);
+    }
+    return *cache;
+  }
+
+  static ReferenceTypeInfo::TypeHandle CreateRootHandle(VariableSizedHandleScope* handles,
+                                                        ClassRoot class_root);
+
+  VariableSizedHandleScope* handles_;
+
+  ReferenceTypeInfo::TypeHandle object_class_handle_;
+  ReferenceTypeInfo::TypeHandle class_class_handle_;
+  ReferenceTypeInfo::TypeHandle method_handle_class_handle_;
+  ReferenceTypeInfo::TypeHandle method_type_class_handle_;
+  ReferenceTypeInfo::TypeHandle string_class_handle_;
+  ReferenceTypeInfo::TypeHandle throwable_class_handle_;
+};
+
+}  // namespace art
+
+#endif  // ART_COMPILER_OPTIMIZING_HANDLE_CACHE_H_
+