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Diffstat (limited to 'runtime/class_root.h')
| -rw-r--r-- | runtime/class_root.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/runtime/class_root.h b/runtime/class_root.h new file mode 100644 index 0000000000..f43e2c6920 --- /dev/null +++ b/runtime/class_root.h @@ -0,0 +1,183 @@ +/* + * Copyright (C) 2018 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_RUNTIME_CLASS_ROOT_H_ +#define ART_RUNTIME_CLASS_ROOT_H_ + +#include "class_linker.h" +#include "mirror/class.h" +#include "mirror/object_array-inl.h" +#include "obj_ptr-inl.h" +#include "runtime.h" + +namespace art { + +namespace mirror { +class ArrayElementVarHandle; +class ByteArrayViewVarHandle; +class ByteBufferViewVarHandle; +class CallSite; +class ClassExt; +class ClassLoader; +class Constructor; +class DexCache; +class EmulatedStackFrame; +class Field; +class FieldVarHandle; +class Method; +class MethodHandleImpl; +class MethodHandlesLookup; +class MethodType; +class Object; +class Proxy; +template<typename T> class PrimitiveArray; +class Reference; +class StackTraceElement; +class String; +class Throwable; +class VarHandle; +} // namespace mirror + +#define CLASS_ROOT_LIST(M) \ + M(kJavaLangClass, "Ljava/lang/Class;", mirror::Class) \ + M(kJavaLangObject, "Ljava/lang/Object;", mirror::Object) \ + M(kClassArrayClass, "[Ljava/lang/Class;", mirror::ObjectArray<mirror::Class>) \ + M(kObjectArrayClass, "[Ljava/lang/Object;", mirror::ObjectArray<mirror::Object>) \ + M(kJavaLangString, "Ljava/lang/String;", mirror::String) \ + M(kJavaLangDexCache, "Ljava/lang/DexCache;", mirror::DexCache) \ + M(kJavaLangRefReference, "Ljava/lang/ref/Reference;", mirror::Reference) \ + M(kJavaLangReflectConstructor, "Ljava/lang/reflect/Constructor;", mirror::Constructor) \ + M(kJavaLangReflectField, "Ljava/lang/reflect/Field;", mirror::Field) \ + M(kJavaLangReflectMethod, "Ljava/lang/reflect/Method;", mirror::Method) \ + M(kJavaLangReflectProxy, "Ljava/lang/reflect/Proxy;", mirror::Proxy) \ + M(kJavaLangStringArrayClass, "[Ljava/lang/String;", mirror::ObjectArray<mirror::String>) \ + M(kJavaLangReflectConstructorArrayClass, "[Ljava/lang/reflect/Constructor;", mirror::ObjectArray<mirror::Constructor>) \ + M(kJavaLangReflectFieldArrayClass, "[Ljava/lang/reflect/Field;", mirror::ObjectArray<mirror::Field>) \ + M(kJavaLangReflectMethodArrayClass, "[Ljava/lang/reflect/Method;", mirror::ObjectArray<mirror::Method>) \ + M(kJavaLangInvokeCallSite, "Ljava/lang/invoke/CallSite;", mirror::CallSite) \ + M(kJavaLangInvokeMethodHandleImpl, "Ljava/lang/invoke/MethodHandleImpl;", mirror::MethodHandleImpl) \ + M(kJavaLangInvokeMethodHandlesLookup, "Ljava/lang/invoke/MethodHandles$Lookup;", mirror::MethodHandlesLookup) \ + M(kJavaLangInvokeMethodType, "Ljava/lang/invoke/MethodType;", mirror::MethodType) \ + M(kJavaLangInvokeVarHandle, "Ljava/lang/invoke/VarHandle;", mirror::VarHandle) \ + M(kJavaLangInvokeFieldVarHandle, "Ljava/lang/invoke/FieldVarHandle;", mirror::FieldVarHandle) \ + M(kJavaLangInvokeArrayElementVarHandle, "Ljava/lang/invoke/ArrayElementVarHandle;", mirror::ArrayElementVarHandle) \ + M(kJavaLangInvokeByteArrayViewVarHandle, "Ljava/lang/invoke/ByteArrayViewVarHandle;", mirror::ByteArrayViewVarHandle) \ + M(kJavaLangInvokeByteBufferViewVarHandle, "Ljava/lang/invoke/ByteBufferViewVarHandle;", mirror::ByteBufferViewVarHandle) \ + M(kJavaLangClassLoader, "Ljava/lang/ClassLoader;", mirror::ClassLoader) \ + M(kJavaLangThrowable, "Ljava/lang/Throwable;", mirror::Throwable) \ + M(kJavaLangClassNotFoundException, "Ljava/lang/ClassNotFoundException;", detail::NoMirrorType<detail::ClassNotFoundExceptionTag>) \ + M(kJavaLangStackTraceElement, "Ljava/lang/StackTraceElement;", mirror::StackTraceElement) \ + M(kDalvikSystemEmulatedStackFrame, "Ldalvik/system/EmulatedStackFrame;", mirror::EmulatedStackFrame) \ + M(kPrimitiveBoolean, "Z", detail::NoMirrorType<uint8_t>) \ + M(kPrimitiveByte, "B", detail::NoMirrorType<int8_t>) \ + M(kPrimitiveChar, "C", detail::NoMirrorType<uint16_t>) \ + M(kPrimitiveDouble, "D", detail::NoMirrorType<double>) \ + M(kPrimitiveFloat, "F", detail::NoMirrorType<float>) \ + M(kPrimitiveInt, "I", detail::NoMirrorType<int32_t>) \ + M(kPrimitiveLong, "J", detail::NoMirrorType<int64_t>) \ + M(kPrimitiveShort, "S", detail::NoMirrorType<int16_t>) \ + M(kPrimitiveVoid, "V", detail::NoMirrorType<void>) \ + M(kBooleanArrayClass, "[Z", mirror::PrimitiveArray<uint8_t>) \ + M(kByteArrayClass, "[B", mirror::PrimitiveArray<int8_t>) \ + M(kCharArrayClass, "[C", mirror::PrimitiveArray<uint16_t>) \ + M(kDoubleArrayClass, "[D", mirror::PrimitiveArray<double>) \ + M(kFloatArrayClass, "[F", mirror::PrimitiveArray<float>) \ + M(kIntArrayClass, "[I", mirror::PrimitiveArray<int32_t>) \ + M(kLongArrayClass, "[J", mirror::PrimitiveArray<int64_t>) \ + M(kShortArrayClass, "[S", mirror::PrimitiveArray<int16_t>) \ + M(kJavaLangStackTraceElementArrayClass, "[Ljava/lang/StackTraceElement;", mirror::ObjectArray<mirror::StackTraceElement>) \ + M(kDalvikSystemClassExt, "Ldalvik/system/ClassExt;", mirror::ClassExt) + +// Well known mirror::Class roots accessed via ClassLinker::GetClassRoots(). +enum class ClassRoot : uint32_t { +#define CLASS_ROOT_ENUMERATOR(name, descriptor, mirror_type) name, + CLASS_ROOT_LIST(CLASS_ROOT_ENUMERATOR) +#undef CLASS_ROOT_ENUMERATOR + kMax, +}; + +const char* GetClassRootDescriptor(ClassRoot class_root); + +template <ReadBarrierOption kReadBarrierOption = kWithReadBarrier> +inline ObjPtr<mirror::Class> GetClassRoot( + ClassRoot class_root, + ObjPtr<mirror::ObjectArray<mirror::Class>> class_roots) REQUIRES_SHARED(Locks::mutator_lock_) { + DCHECK(class_roots != nullptr); + if (kReadBarrierOption == kWithReadBarrier) { + // With read barrier all references must point to the to-space. + // Without read barrier, this check could fail. + DCHECK_EQ(class_roots, Runtime::Current()->GetClassLinker()->GetClassRoots()); + } + DCHECK_LT(static_cast<uint32_t>(class_root), static_cast<uint32_t>(ClassRoot::kMax)); + int32_t index = static_cast<int32_t>(class_root); + ObjPtr<mirror::Class> klass = + class_roots->GetWithoutChecks<kDefaultVerifyFlags, kReadBarrierOption>(index); + DCHECK(klass != nullptr); + return klass.Ptr(); +} + +template <ReadBarrierOption kReadBarrierOption = kWithReadBarrier> +inline ObjPtr<mirror::Class> GetClassRoot(ClassRoot class_root, ClassLinker* linker) + REQUIRES_SHARED(Locks::mutator_lock_) { + return GetClassRoot<kReadBarrierOption>(class_root, linker->GetClassRoots<kReadBarrierOption>()); +} + +template <ReadBarrierOption kReadBarrierOption = kWithReadBarrier> +inline ObjPtr<mirror::Class> GetClassRoot(ClassRoot class_root) + REQUIRES_SHARED(Locks::mutator_lock_) { + return GetClassRoot<kReadBarrierOption>(class_root, Runtime::Current()->GetClassLinker()); +} + +namespace detail { + +class ClassNotFoundExceptionTag; +template <class Tag> struct NoMirrorType; + +template <class MirrorType> +struct ClassRootSelector; // No definition for unspecialized ClassRoot selector. + +#define SPECIALIZE_CLASS_ROOT_SELECTOR(name, descriptor, mirror_type) \ + template <> \ + struct ClassRootSelector<mirror_type> { \ + static constexpr ClassRoot value = ClassRoot::name; \ + }; + +CLASS_ROOT_LIST(SPECIALIZE_CLASS_ROOT_SELECTOR) + +#undef SPECIALIZE_CLASS_ROOT_SELECTOR + +} // namespace detail + +template <class MirrorType, ReadBarrierOption kReadBarrierOption = kWithReadBarrier> +inline ObjPtr<mirror::Class> GetClassRoot(ObjPtr<mirror::ObjectArray<mirror::Class>> class_roots) + REQUIRES_SHARED(Locks::mutator_lock_) { + return GetClassRoot<kWithReadBarrier>(detail::ClassRootSelector<MirrorType>::value, class_roots); +} + +template <class MirrorType, ReadBarrierOption kReadBarrierOption = kWithReadBarrier> +inline ObjPtr<mirror::Class> GetClassRoot(ClassLinker* linker) + REQUIRES_SHARED(Locks::mutator_lock_) { + return GetClassRoot<kWithReadBarrier>(detail::ClassRootSelector<MirrorType>::value, linker); +} + +template <class MirrorType, ReadBarrierOption kReadBarrierOption = kWithReadBarrier> +inline ObjPtr<mirror::Class> GetClassRoot() REQUIRES_SHARED(Locks::mutator_lock_) { + return GetClassRoot<kWithReadBarrier>(detail::ClassRootSelector<MirrorType>::value); +} + +} // namespace art + +#endif // ART_RUNTIME_CLASS_ROOT_H_ |