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/*
* Copyright (C) 2011 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_MIRROR_OBJECT_H_
#define ART_RUNTIME_MIRROR_OBJECT_H_
#include "base/atomic.h"
#include "base/casts.h"
#include "base/enums.h"
#include "dex/primitive.h"
#include "obj_ptr.h"
#include "object_reference.h"
#include "offsets.h"
#include "read_barrier_config.h"
#include "read_barrier_option.h"
#include "runtime_globals.h"
#include "verify_object.h"
namespace art {
class ArtField;
class ArtMethod;
class LockWord;
class Monitor;
struct ObjectOffsets;
class Thread;
class VoidFunctor;
namespace mirror {
class Array;
class Class;
class ClassLoader;
class DexCache;
class FinalizerReference;
template<class T> class ObjectArray;
template<class T> class PrimitiveArray;
typedef PrimitiveArray<uint8_t> BooleanArray;
typedef PrimitiveArray<int8_t> ByteArray;
typedef PrimitiveArray<uint16_t> CharArray;
typedef PrimitiveArray<double> DoubleArray;
typedef PrimitiveArray<float> FloatArray;
typedef PrimitiveArray<int32_t> IntArray;
typedef PrimitiveArray<int64_t> LongArray;
typedef PrimitiveArray<int16_t> ShortArray;
class Reference;
class String;
class Throwable;
// Fields within mirror objects aren't accessed directly so that the appropriate amount of
// handshaking is done with GC (for example, read and write barriers). This macro is used to
// compute an offset for the Set/Get methods defined in Object that can safely access fields.
#define OFFSET_OF_OBJECT_MEMBER(type, field) \
MemberOffset(OFFSETOF_MEMBER(type, field))
// Checks that we don't do field assignments which violate the typing system.
static constexpr bool kCheckFieldAssignments = false;
// Size of Object.
static constexpr uint32_t kObjectHeaderSize = kUseBrooksReadBarrier ? 16 : 8;
// C++ mirror of java.lang.Object
class MANAGED LOCKABLE Object {
public:
// The number of vtable entries in java.lang.Object.
static constexpr size_t kVTableLength = 11;
// The size of the java.lang.Class representing a java.lang.Object.
static uint32_t ClassSize(PointerSize pointer_size);
// Size of an instance of java.lang.Object.
static constexpr uint32_t InstanceSize() {
return sizeof(Object);
}
static constexpr MemberOffset ClassOffset() {
return OFFSET_OF_OBJECT_MEMBER(Object, klass_);
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ALWAYS_INLINE Class* GetClass() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void SetClass(ObjPtr<Class> new_klass) REQUIRES_SHARED(Locks::mutator_lock_);
// Get the read barrier state with a fake address dependency.
// '*fake_address_dependency' will be set to 0.
ALWAYS_INLINE uint32_t GetReadBarrierState(uintptr_t* fake_address_dependency)
REQUIRES_SHARED(Locks::mutator_lock_);
// This version does not offer any special mechanism to prevent load-load reordering.
ALWAYS_INLINE uint32_t GetReadBarrierState() REQUIRES_SHARED(Locks::mutator_lock_);
// Get the read barrier state with a load-acquire.
ALWAYS_INLINE uint32_t GetReadBarrierStateAcquire() REQUIRES_SHARED(Locks::mutator_lock_);
ALWAYS_INLINE void SetReadBarrierState(uint32_t rb_state) REQUIRES_SHARED(Locks::mutator_lock_);
template<std::memory_order kMemoryOrder = std::memory_order_relaxed>
ALWAYS_INLINE bool AtomicSetReadBarrierState(uint32_t expected_rb_state, uint32_t rb_state)
REQUIRES_SHARED(Locks::mutator_lock_);
ALWAYS_INLINE uint32_t GetMarkBit() REQUIRES_SHARED(Locks::mutator_lock_);
ALWAYS_INLINE bool AtomicSetMarkBit(uint32_t expected_mark_bit, uint32_t mark_bit)
REQUIRES_SHARED(Locks::mutator_lock_);
// Assert that the read barrier state is in the default (white, i.e. non-gray) state.
ALWAYS_INLINE void AssertReadBarrierState() const REQUIRES_SHARED(Locks::mutator_lock_);
// The verifier treats all interfaces as java.lang.Object and relies on runtime checks in
// invoke-interface to detect incompatible interface types.
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool VerifierInstanceOf(ObjPtr<Class> klass) REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool InstanceOf(ObjPtr<Class> klass) REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
size_t SizeOf() REQUIRES_SHARED(Locks::mutator_lock_);
Object* Clone(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
int32_t IdentityHashCode()
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Locks::thread_list_lock_,
!Locks::thread_suspend_count_lock_);
static constexpr MemberOffset MonitorOffset() {
return OFFSET_OF_OBJECT_MEMBER(Object, monitor_);
}
// As_volatile can be false if the mutators are suspended. This is an optimization since it
// avoids the barriers.
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
LockWord GetLockWord(bool as_volatile) REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void SetLockWord(LockWord new_val, bool as_volatile) REQUIRES_SHARED(Locks::mutator_lock_);
bool CasLockWord(LockWord old_val, LockWord new_val, CASMode mode, std::memory_order memory_order)
REQUIRES_SHARED(Locks::mutator_lock_);
uint32_t GetLockOwnerThreadId();
// Try to enter the monitor, returns non null if we succeeded.
ObjPtr<mirror::Object> MonitorTryEnter(Thread* self)
EXCLUSIVE_LOCK_FUNCTION()
REQUIRES(!Roles::uninterruptible_)
REQUIRES_SHARED(Locks::mutator_lock_);
ObjPtr<mirror::Object> MonitorEnter(Thread* self)
EXCLUSIVE_LOCK_FUNCTION()
REQUIRES(!Roles::uninterruptible_)
REQUIRES_SHARED(Locks::mutator_lock_);
bool MonitorExit(Thread* self)
REQUIRES(!Roles::uninterruptible_)
REQUIRES_SHARED(Locks::mutator_lock_)
UNLOCK_FUNCTION();
void Notify(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_);
void NotifyAll(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_);
void Wait(Thread* self, int64_t timeout, int32_t nanos) REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsClass() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<Class> AsClass() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsObjectArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<ObjectArray<T>> AsObjectArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsClassLoader() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ObjPtr<ClassLoader> AsClassLoader() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsDexCache() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ObjPtr<DexCache> AsDexCache() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsArrayInstance() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<Array> AsArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsBooleanArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<BooleanArray> AsBooleanArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsByteArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<ByteArray> AsByteArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsCharArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<CharArray> AsCharArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsShortArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<ShortArray> AsShortArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsIntArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<IntArray> AsIntArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<IntArray> AsIntArrayUnchecked() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsLongArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<LongArray> AsLongArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<LongArray> AsLongArrayUnchecked() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsFloatArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<FloatArray> AsFloatArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsDoubleArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<DoubleArray> AsDoubleArray() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsString() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ObjPtr<String> AsString() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<Throwable> AsThrowable() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsReferenceInstance() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ObjPtr<Reference> AsReference() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsWeakReferenceInstance() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsSoftReferenceInstance() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsFinalizerReferenceInstance() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<FinalizerReference> AsFinalizerReference() REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsPhantomReferenceInstance() REQUIRES_SHARED(Locks::mutator_lock_);
// Accessor for Java type fields.
template<class T,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
bool kIsVolatile = false>
ALWAYS_INLINE T* GetFieldObject(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<class T,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ALWAYS_INLINE T* GetFieldObjectVolatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldObjectWithoutWriteBarrier(MemberOffset field_offset,
ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldObject(MemberOffset field_offset, ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldObjectVolatile(MemberOffset field_offset, ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldObjectTransaction(MemberOffset field_offset, ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool CasFieldObject(MemberOffset field_offset,
ObjPtr<Object> old_value,
ObjPtr<Object> new_value,
CASMode mode,
std::memory_order memory_order)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool CasFieldObjectWithoutWriteBarrier(MemberOffset field_offset,
ObjPtr<Object> old_value,
ObjPtr<Object> new_value,
CASMode mode,
std::memory_order memory_order)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<Object> CompareAndExchangeFieldObject(MemberOffset field_offset,
ObjPtr<Object> old_value,
ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjPtr<Object> ExchangeFieldObject(MemberOffset field_offset, ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
HeapReference<Object>* GetFieldObjectReferenceAddr(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<typename kType, bool kIsVolatile>
ALWAYS_INLINE void SetFieldPrimitive(MemberOffset field_offset, kType new_value)
REQUIRES_SHARED(Locks::mutator_lock_) {
uint8_t* raw_addr = reinterpret_cast<uint8_t*>(this) + field_offset.Int32Value();
kType* addr = reinterpret_cast<kType*>(raw_addr);
if (kIsVolatile) {
reinterpret_cast<Atomic<kType>*>(addr)->store(new_value, std::memory_order_seq_cst);
} else {
reinterpret_cast<Atomic<kType>*>(addr)->StoreJavaData(new_value);
}
}
template<typename kType, bool kIsVolatile>
ALWAYS_INLINE kType GetFieldPrimitive(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
const uint8_t* raw_addr = reinterpret_cast<const uint8_t*>(this) + field_offset.Int32Value();
const kType* addr = reinterpret_cast<const kType*>(raw_addr);
if (kIsVolatile) {
return reinterpret_cast<const Atomic<kType>*>(addr)->load(std::memory_order_seq_cst);
} else {
return reinterpret_cast<const Atomic<kType>*>(addr)->LoadJavaData();
}
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE uint8_t GetFieldBoolean(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
Verify<kVerifyFlags>();
return GetFieldPrimitive<uint8_t, kIsVolatile>(field_offset);
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int8_t GetFieldByte(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE uint8_t GetFieldBooleanVolatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int8_t GetFieldByteVolatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldBoolean(MemberOffset field_offset, uint8_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldByte(MemberOffset field_offset, int8_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldBooleanVolatile(MemberOffset field_offset, uint8_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldByteVolatile(MemberOffset field_offset, int8_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE uint16_t GetFieldChar(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int16_t GetFieldShort(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE uint16_t GetFieldCharVolatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int16_t GetFieldShortVolatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldChar(MemberOffset field_offset, uint16_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldShort(MemberOffset field_offset, int16_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldCharVolatile(MemberOffset field_offset, uint16_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldShortVolatile(MemberOffset field_offset, int16_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int32_t GetField32(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
Verify<kVerifyFlags>();
return GetFieldPrimitive<int32_t, kIsVolatile>(field_offset);
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int32_t GetField32Volatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
return GetField32<kVerifyFlags, true>(field_offset);
}
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetField32(MemberOffset field_offset, int32_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetField32Volatile(MemberOffset field_offset, int32_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetField32Transaction(MemberOffset field_offset, int32_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool CasField32(MemberOffset field_offset,
int32_t old_value,
int32_t new_value,
CASMode mode,
std::memory_order memory_order)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int64_t GetField64(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
Verify<kVerifyFlags>();
return GetFieldPrimitive<int64_t, kIsVolatile>(field_offset);
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int64_t GetField64Volatile(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
return GetField64<kVerifyFlags, true>(field_offset);
}
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetField64(MemberOffset field_offset, int64_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetField64Volatile(MemberOffset field_offset, int64_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
bool kIsVolatile = false>
ALWAYS_INLINE void SetField64Transaction(MemberOffset field_offset, int32_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldWeakSequentiallyConsistent64(MemberOffset field_offset,
int64_t old_value,
int64_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldStrongSequentiallyConsistent64(MemberOffset field_offset,
int64_t old_value,
int64_t new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
typename T>
void SetFieldPtr(MemberOffset field_offset, T new_value)
REQUIRES_SHARED(Locks::mutator_lock_) {
SetFieldPtrWithSize<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, new_value, kRuntimePointerSize);
}
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
typename T>
void SetFieldPtr64(MemberOffset field_offset, T new_value)
REQUIRES_SHARED(Locks::mutator_lock_) {
SetFieldPtrWithSize<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, new_value, PointerSize::k64);
}
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
typename T>
ALWAYS_INLINE void SetFieldPtrWithSize(MemberOffset field_offset,
T new_value,
PointerSize pointer_size)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (pointer_size == PointerSize::k32) {
SetField32<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, reinterpret_cast32<int32_t>(new_value));
} else {
SetField64<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, reinterpret_cast64<int64_t>(new_value));
}
}
// Base class for accessors used to describe accesses performed by VarHandle methods.
template <typename T>
class Accessor {
public:
virtual ~Accessor() {
static_assert(std::is_arithmetic<T>::value, "unsupported type");
}
virtual void Access(T* field_address) = 0;
};
// Getter method that exposes the raw address of a primitive value-type field to an Accessor
// instance. This are used by VarHandle accessor methods to read fields with a wider range of
// memory orderings than usually required.
template<typename T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void GetPrimitiveFieldViaAccessor(MemberOffset field_offset, Accessor<T>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
// Update methods that expose the raw address of a primitive value-type to an Accessor instance
// that will attempt to update the field. These are used by VarHandle accessor methods to
// atomically update fields with a wider range of memory orderings than usually required.
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void UpdateFieldBooleanViaAccessor(MemberOffset field_offset, Accessor<uint8_t>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void UpdateFieldByteViaAccessor(MemberOffset field_offset, Accessor<int8_t>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void UpdateFieldCharViaAccessor(MemberOffset field_offset, Accessor<uint16_t>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void UpdateFieldShortViaAccessor(MemberOffset field_offset, Accessor<int16_t>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void UpdateField32ViaAccessor(MemberOffset field_offset, Accessor<int32_t>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
template<bool kTransactionActive,
bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void UpdateField64ViaAccessor(MemberOffset field_offset, Accessor<int64_t>* accessor)
REQUIRES_SHARED(Locks::mutator_lock_);
// TODO fix thread safety analysis broken by the use of template. This should be
// REQUIRES_SHARED(Locks::mutator_lock_).
template <bool kVisitNativeRoots = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
typename Visitor,
typename JavaLangRefVisitor = VoidFunctor>
void VisitReferences(const Visitor& visitor, const JavaLangRefVisitor& ref_visitor)
NO_THREAD_SAFETY_ANALYSIS;
ArtField* FindFieldByOffset(MemberOffset offset) REQUIRES_SHARED(Locks::mutator_lock_);
// Used by object_test.
static void SetHashCodeSeed(uint32_t new_seed);
// Generate an identity hash code. Public for object test.
static uint32_t GenerateIdentityHashCode();
// Returns a human-readable form of the name of the *class* of the given object.
// So given an instance of java.lang.String, the output would
// be "java.lang.String". Given an array of int, the output would be "int[]".
// Given String.class, the output would be "java.lang.Class<java.lang.String>".
static std::string PrettyTypeOf(ObjPtr<mirror::Object> obj)
REQUIRES_SHARED(Locks::mutator_lock_);
std::string PrettyTypeOf()
REQUIRES_SHARED(Locks::mutator_lock_);
protected:
// Accessors for non-Java type fields
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
T GetFieldPtr(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
return GetFieldPtrWithSize<T, kVerifyFlags, kIsVolatile>(field_offset, kRuntimePointerSize);
}
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
T GetFieldPtr64(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
return GetFieldPtrWithSize<T, kVerifyFlags, kIsVolatile>(field_offset, PointerSize::k64);
}
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE T GetFieldPtrWithSize(MemberOffset field_offset, PointerSize pointer_size)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (pointer_size == PointerSize::k32) {
int32_t v = GetField32<kVerifyFlags, kIsVolatile>(field_offset);
return reinterpret_cast32<T>(v);
} else {
int64_t v = GetField64<kVerifyFlags, kIsVolatile>(field_offset);
return reinterpret_cast64<T>(v);
}
}
// TODO: Fixme when anotatalysis works with visitors.
template<bool kIsStatic,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
typename Visitor>
void VisitFieldsReferences(uint32_t ref_offsets, const Visitor& visitor) HOT_ATTR
NO_THREAD_SAFETY_ANALYSIS;
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
typename Visitor>
void VisitInstanceFieldsReferences(ObjPtr<mirror::Class> klass, const Visitor& visitor) HOT_ATTR
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
typename Visitor>
void VisitStaticFieldsReferences(ObjPtr<mirror::Class> klass, const Visitor& visitor) HOT_ATTR
REQUIRES_SHARED(Locks::mutator_lock_);
private:
// Get a field with acquire semantics.
template<typename kSize>
ALWAYS_INLINE kSize GetFieldAcquire(MemberOffset field_offset)
REQUIRES_SHARED(Locks::mutator_lock_);
// Verify the type correctness of stores to fields.
// TODO: This can cause thread suspension and isn't moving GC safe.
void CheckFieldAssignmentImpl(MemberOffset field_offset, ObjPtr<Object> new_value)
REQUIRES_SHARED(Locks::mutator_lock_);
void CheckFieldAssignment(MemberOffset field_offset, ObjPtr<Object>new_value)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (kCheckFieldAssignments) {
CheckFieldAssignmentImpl(field_offset, new_value);
}
}
template<VerifyObjectFlags kVerifyFlags>
ALWAYS_INLINE void Verify() {
if (kVerifyFlags & kVerifyThis) {
VerifyObject(this);
}
}
// Not ObjPtr since the values may be unaligned for logic in verification.cc.
template<VerifyObjectFlags kVerifyFlags, typename Reference>
ALWAYS_INLINE static void VerifyRead(Reference value) {
if (kVerifyFlags & kVerifyReads) {
VerifyObject(value);
}
}
template<VerifyObjectFlags kVerifyFlags>
ALWAYS_INLINE static void VerifyWrite(ObjPtr<mirror::Object> value) {
if (kVerifyFlags & kVerifyWrites) {
VerifyObject(value);
}
}
template<VerifyObjectFlags kVerifyFlags>
ALWAYS_INLINE void VerifyCAS(ObjPtr<mirror::Object> new_value, ObjPtr<mirror::Object> old_value) {
Verify<kVerifyFlags>();
VerifyRead<kVerifyFlags>(old_value);
VerifyWrite<kVerifyFlags>(new_value);
}
// Verify transaction is active (if required).
template<bool kTransactionActive, bool kCheckTransaction>
ALWAYS_INLINE void VerifyTransaction();
// A utility function that copies an object in a read barrier and write barrier-aware way.
// This is internally used by Clone() and Class::CopyOf(). If the object is finalizable,
// it is the callers job to call Heap::AddFinalizerReference.
static Object* CopyObject(ObjPtr<mirror::Object> dest,
ObjPtr<mirror::Object> src,
size_t num_bytes)
REQUIRES_SHARED(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags, Primitive::Type kType>
bool IsSpecificPrimitiveArray() REQUIRES_SHARED(Locks::mutator_lock_);
static Atomic<uint32_t> hash_code_seed;
// The Class representing the type of the object.
HeapReference<Class> klass_;
// Monitor and hash code information.
uint32_t monitor_;
#ifdef USE_BROOKS_READ_BARRIER
// Note names use a 'x' prefix and the x_rb_ptr_ is of type int
// instead of Object to go with the alphabetical/by-type field order
// on the Java side.
uint32_t x_rb_ptr_; // For the Brooks pointer.
uint32_t x_xpadding_; // For 8-byte alignment. TODO: get rid of this.
#endif
friend class art::Monitor;
friend struct art::ObjectOffsets; // for verifying offset information
friend class CopyObjectVisitor; // for CopyObject().
friend class CopyClassVisitor; // for CopyObject().
DISALLOW_ALLOCATION();
DISALLOW_IMPLICIT_CONSTRUCTORS(Object);
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_OBJECT_H_