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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 "globals.h"
#include "object_reference.h"
#include "offsets.h"
#include "verify_object.h"
namespace art {
class ArtField;
class ArtMethod;
class ImageWriter;
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(size_t pointer_size);
// Size of an instance of java.lang.Object.
static constexpr uint32_t InstanceSize() {
return sizeof(Object);
}
static MemberOffset ClassOffset() {
return OFFSET_OF_OBJECT_MEMBER(Object, klass_);
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ALWAYS_INLINE Class* GetClass() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void SetClass(Class* new_klass) SHARED_REQUIRES(Locks::mutator_lock_);
Object* GetReadBarrierPointer() SHARED_REQUIRES(Locks::mutator_lock_);
#ifndef USE_BAKER_OR_BROOKS_READ_BARRIER
NO_RETURN
#endif
void SetReadBarrierPointer(Object* rb_ptr) SHARED_REQUIRES(Locks::mutator_lock_);
#ifndef USE_BAKER_OR_BROOKS_READ_BARRIER
NO_RETURN
#endif
bool AtomicSetReadBarrierPointer(Object* expected_rb_ptr, Object* rb_ptr)
SHARED_REQUIRES(Locks::mutator_lock_);
void AssertReadBarrierPointer() const SHARED_REQUIRES(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(Class* klass) SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool InstanceOf(Class* klass) SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
size_t SizeOf() SHARED_REQUIRES(Locks::mutator_lock_);
Object* Clone(Thread* self) SHARED_REQUIRES(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
int32_t IdentityHashCode() const
SHARED_REQUIRES(Locks::mutator_lock_)
REQUIRES(!Locks::thread_list_lock_, !Locks::thread_suspend_count_lock_);
static 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) SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
void SetLockWord(LockWord new_val, bool as_volatile) SHARED_REQUIRES(Locks::mutator_lock_);
bool CasLockWordWeakSequentiallyConsistent(LockWord old_val, LockWord new_val)
SHARED_REQUIRES(Locks::mutator_lock_);
bool CasLockWordWeakRelaxed(LockWord old_val, LockWord new_val)
SHARED_REQUIRES(Locks::mutator_lock_);
uint32_t GetLockOwnerThreadId();
mirror::Object* MonitorEnter(Thread* self)
EXCLUSIVE_LOCK_FUNCTION()
REQUIRES(!Roles::uninterruptible_)
SHARED_REQUIRES(Locks::mutator_lock_);
bool MonitorExit(Thread* self)
REQUIRES(!Roles::uninterruptible_)
SHARED_REQUIRES(Locks::mutator_lock_)
UNLOCK_FUNCTION();
void Notify(Thread* self) SHARED_REQUIRES(Locks::mutator_lock_);
void NotifyAll(Thread* self) SHARED_REQUIRES(Locks::mutator_lock_);
void Wait(Thread* self) SHARED_REQUIRES(Locks::mutator_lock_);
void Wait(Thread* self, int64_t timeout, int32_t nanos) SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsClass() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
Class* AsClass() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsObjectArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ObjectArray<T>* AsObjectArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsClassLoader() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ClassLoader* AsClassLoader() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsDexCache() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
DexCache* AsDexCache() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsArrayInstance() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
Array* AsArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
BooleanArray* AsBooleanArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ByteArray* AsByteArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ByteArray* AsByteSizedArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
CharArray* AsCharArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ShortArray* AsShortArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ShortArray* AsShortSizedArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsIntArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
IntArray* AsIntArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsLongArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
LongArray* AsLongArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsFloatArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
FloatArray* AsFloatArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsDoubleArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
DoubleArray* AsDoubleArray() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
bool IsString() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
String* AsString() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
Throwable* AsThrowable() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsReferenceInstance() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
Reference* AsReference() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsWeakReferenceInstance() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsSoftReferenceInstance() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsFinalizerReferenceInstance() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
FinalizerReference* AsFinalizerReference() SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool IsPhantomReferenceInstance() SHARED_REQUIRES(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)
SHARED_REQUIRES(Locks::mutator_lock_);
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ALWAYS_INLINE T* GetFieldObjectVolatile(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldObjectWithoutWriteBarrier(MemberOffset field_offset, Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE void SetFieldObject(MemberOffset field_offset, Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldObjectVolatile(MemberOffset field_offset, Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldWeakSequentiallyConsistentObject(MemberOffset field_offset, Object* old_value,
Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldWeakSequentiallyConsistentObjectWithoutWriteBarrier(MemberOffset field_offset,
Object* old_value,
Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldStrongSequentiallyConsistentObject(MemberOffset field_offset, Object* old_value,
Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldStrongSequentiallyConsistentObjectWithoutWriteBarrier(MemberOffset field_offset,
Object* old_value,
Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
HeapReference<Object>* GetFieldObjectReferenceAddr(MemberOffset field_offset);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE uint8_t GetFieldBoolean(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int8_t GetFieldByte(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE uint8_t GetFieldBooleanVolatile(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int8_t GetFieldByteVolatile(MemberOffset field_offset)
SHARED_REQUIRES(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)
SHARED_REQUIRES(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)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldBooleanVolatile(MemberOffset field_offset, uint8_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldByteVolatile(MemberOffset field_offset, int8_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE uint16_t GetFieldChar(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int16_t GetFieldShort(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE uint16_t GetFieldCharVolatile(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int16_t GetFieldShortVolatile(MemberOffset field_offset)
SHARED_REQUIRES(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)
SHARED_REQUIRES(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)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldCharVolatile(MemberOffset field_offset, uint16_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetFieldShortVolatile(MemberOffset field_offset, int16_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int32_t GetField32(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int32_t GetField32Volatile(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE void SetField32(MemberOffset field_offset, int32_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetField32Volatile(MemberOffset field_offset, int32_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE bool CasFieldWeakSequentiallyConsistent32(MemberOffset field_offset,
int32_t old_value, int32_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldWeakRelaxed32(MemberOffset field_offset, int32_t old_value,
int32_t new_value) ALWAYS_INLINE
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CasFieldStrongSequentiallyConsistent32(MemberOffset field_offset, int32_t old_value,
int32_t new_value) ALWAYS_INLINE
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE int64_t GetField64(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE int64_t GetField64Volatile(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE void SetField64(MemberOffset field_offset, int64_t new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetField64Volatile(MemberOffset field_offset, int64_t new_value)
SHARED_REQUIRES(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)
SHARED_REQUIRES(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)
SHARED_REQUIRES(Locks::mutator_lock_);
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, typename T>
void SetFieldPtr(MemberOffset field_offset, T new_value)
SHARED_REQUIRES(Locks::mutator_lock_) {
SetFieldPtrWithSize<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, new_value, sizeof(void*));
}
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, typename T>
ALWAYS_INLINE void SetFieldPtrWithSize(MemberOffset field_offset, T new_value,
size_t pointer_size)
SHARED_REQUIRES(Locks::mutator_lock_) {
DCHECK(pointer_size == 4 || pointer_size == 8) << pointer_size;
if (pointer_size == 4) {
intptr_t ptr = reinterpret_cast<intptr_t>(new_value);
DCHECK_EQ(static_cast<int32_t>(ptr), ptr); // Check that we dont lose any non 0 bits.
SetField32<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, static_cast<int32_t>(ptr));
} else {
SetField64<kTransactionActive, kCheckTransaction, kVerifyFlags>(
field_offset, static_cast<int64_t>(reinterpret_cast<uintptr_t>(new_value)));
}
}
// TODO fix thread safety analysis broken by the use of template. This should be
// SHARED_REQUIRES(Locks::mutator_lock_).
template <VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
typename Visitor,
typename JavaLangRefVisitor = VoidFunctor>
void VisitReferences(const Visitor& visitor, const JavaLangRefVisitor& ref_visitor)
NO_THREAD_SAFETY_ANALYSIS;
ArtField* FindFieldByOffset(MemberOffset offset) SHARED_REQUIRES(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();
protected:
// Accessors for non-Java type fields
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
T GetFieldPtr(MemberOffset field_offset)
SHARED_REQUIRES(Locks::mutator_lock_) {
return GetFieldPtrWithSize<T, kVerifyFlags, kIsVolatile>(field_offset, sizeof(void*));
}
template<class T, VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, bool kIsVolatile = false>
ALWAYS_INLINE T GetFieldPtrWithSize(MemberOffset field_offset, size_t pointer_size)
SHARED_REQUIRES(Locks::mutator_lock_) {
DCHECK(pointer_size == 4 || pointer_size == 8) << pointer_size;
if (pointer_size == 4) {
return reinterpret_cast<T>(GetField32<kVerifyFlags, kIsVolatile>(field_offset));
} else {
int64_t v = GetField64<kVerifyFlags, kIsVolatile>(field_offset);
// Check that we dont lose any non 0 bits.
DCHECK_EQ(static_cast<int64_t>(static_cast<uintptr_t>(v)), v);
return reinterpret_cast<T>(static_cast<uintptr_t>(v));
}
}
// TODO: Fixme when anotatalysis works with visitors.
template<bool kIsStatic, typename Visitor>
void VisitFieldsReferences(uint32_t ref_offsets, const Visitor& visitor) HOT_ATTR
NO_THREAD_SAFETY_ANALYSIS;
template<typename Visitor>
void VisitInstanceFieldsReferences(mirror::Class* klass, const Visitor& visitor) HOT_ATTR
SHARED_REQUIRES(Locks::mutator_lock_);
template<typename Visitor>
void VisitStaticFieldsReferences(mirror::Class* klass, const Visitor& visitor) HOT_ATTR
SHARED_REQUIRES(Locks::mutator_lock_);
private:
template<typename kSize, bool kIsVolatile>
ALWAYS_INLINE void SetField(MemberOffset field_offset, kSize new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
template<typename kSize, bool kIsVolatile>
ALWAYS_INLINE kSize GetField(MemberOffset field_offset)
SHARED_REQUIRES(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, Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_);
void CheckFieldAssignment(MemberOffset field_offset, Object* new_value)
SHARED_REQUIRES(Locks::mutator_lock_) {
if (kCheckFieldAssignments) {
CheckFieldAssignmentImpl(field_offset, new_value);
}
}
// 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().
static Object* CopyObject(Thread* self, mirror::Object* dest, mirror::Object* src,
size_t num_bytes)
SHARED_REQUIRES(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::ImageWriter;
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_