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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Note 1: Any file that includes this one should include object-macros-undef.h
// at the bottom.
// Note 2: This file is deliberately missing the include guards (the undeffing
// approach wouldn't work otherwise).
//
// PRESUBMIT_INTENTIONALLY_MISSING_INCLUDE_GUARD
// The accessors with RELAXED_, ACQUIRE_, and RELEASE_ prefixes should be used
// for fields that can be written to and read from multiple threads at the same
// time. See comments in src/base/atomicops.h for the memory ordering sematics.
#include "src/base/memory.h"
// Since this changes visibility, it should always be last in a class
// definition.
#define OBJECT_CONSTRUCTORS(Type, ...) \
public: \
constexpr Type() : __VA_ARGS__() {} \
\
protected: \
template <typename TFieldType, int kFieldOffset> \
friend class TaggedField; \
\
explicit inline Type(Address ptr)
#define OBJECT_CONSTRUCTORS_IMPL(Type, Super) \
inline Type::Type(Address ptr) : Super(ptr) { SLOW_DCHECK(Is##Type()); }
#define NEVER_READ_ONLY_SPACE \
inline Heap* GetHeap() const; \
inline Isolate* GetIsolate() const;
// TODO(leszeks): Add checks in the factory that we never allocate these
// objects in RO space.
#define NEVER_READ_ONLY_SPACE_IMPL(Type) \
Heap* Type::GetHeap() const { return GetHeapFromWritableObject(*this); } \
Isolate* Type::GetIsolate() const { \
return GetIsolateFromWritableObject(*this); \
}
#define DECL_PRIMITIVE_ACCESSORS(name, type) \
inline type name() const; \
inline void set_##name(type value);
#define DECL_SYNCHRONIZED_PRIMITIVE_ACCESSORS(name, type) \
inline type synchronized_##name() const; \
inline void synchronized_set_##name(type value);
#define DECL_BOOLEAN_ACCESSORS(name) DECL_PRIMITIVE_ACCESSORS(name, bool)
#define DECL_INT_ACCESSORS(name) DECL_PRIMITIVE_ACCESSORS(name, int)
#define DECL_SYNCHRONIZED_INT_ACCESSORS(name) \
DECL_SYNCHRONIZED_PRIMITIVE_ACCESSORS(name, int)
#define DECL_INT32_ACCESSORS(name) DECL_PRIMITIVE_ACCESSORS(name, int32_t)
#define DECL_UINT16_ACCESSORS(name) \
inline uint16_t name() const; \
inline void set_##name(int value);
#define DECL_INT16_ACCESSORS(name) \
inline int16_t name() const; \
inline void set_##name(int16_t value);
#define DECL_UINT8_ACCESSORS(name) \
inline uint8_t name() const; \
inline void set_##name(int value);
// TODO(ishell): eventually isolate-less getters should not be used anymore.
// For full pointer-mode the C++ compiler should optimize away unused isolate
// parameter.
#define DECL_GETTER(name, type) \
inline type name() const; \
inline type name(Isolate* isolate) const;
#define DEF_GETTER(holder, name, type) \
type holder::name() const { \
Isolate* isolate = GetIsolateForPtrCompr(*this); \
return holder::name(isolate); \
} \
type holder::name(Isolate* isolate) const
#define DECL_ACCESSORS(name, type) \
DECL_GETTER(name, type) \
inline void set_##name(type value, \
WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
#define DECL_CAST(Type) \
V8_INLINE static Type cast(Object object); \
V8_INLINE static Type unchecked_cast(Object object) { \
return bit_cast<Type>(object); \
}
#define CAST_ACCESSOR(Type) \
Type Type::cast(Object object) { return Type(object.ptr()); }
#define INT_ACCESSORS(holder, name, offset) \
int holder::name() const { return ReadField<int>(offset); } \
void holder::set_##name(int value) { WriteField<int>(offset, value); }
#define INT32_ACCESSORS(holder, name, offset) \
int32_t holder::name() const { return ReadField<int32_t>(offset); } \
void holder::set_##name(int32_t value) { WriteField<int32_t>(offset, value); }
#define RELAXED_INT32_ACCESSORS(holder, name, offset) \
int32_t holder::name() const { \
return RELAXED_READ_INT32_FIELD(*this, offset); \
} \
void holder::set_##name(int32_t value) { \
RELAXED_WRITE_INT32_FIELD(*this, offset, value); \
}
#define UINT16_ACCESSORS(holder, name, offset) \
uint16_t holder::name() const { return ReadField<uint16_t>(offset); } \
void holder::set_##name(int value) { \
DCHECK_GE(value, 0); \
DCHECK_LE(value, static_cast<uint16_t>(-1)); \
WriteField<uint16_t>(offset, value); \
}
#define UINT8_ACCESSORS(holder, name, offset) \
uint8_t holder::name() const { return ReadField<uint8_t>(offset); } \
void holder::set_##name(int value) { \
DCHECK_GE(value, 0); \
DCHECK_LE(value, static_cast<uint8_t>(-1)); \
WriteField<uint8_t>(offset, value); \
}
#define ACCESSORS_CHECKED2(holder, name, type, offset, get_condition, \
set_condition) \
DEF_GETTER(holder, name, type) { \
type value = TaggedField<type, offset>::load(isolate, *this); \
DCHECK(get_condition); \
return value; \
} \
void holder::set_##name(type value, WriteBarrierMode mode) { \
DCHECK(set_condition); \
TaggedField<type, offset>::store(*this, value); \
CONDITIONAL_WRITE_BARRIER(*this, offset, value, mode); \
}
#define ACCESSORS_CHECKED(holder, name, type, offset, condition) \
ACCESSORS_CHECKED2(holder, name, type, offset, condition, condition)
#define ACCESSORS(holder, name, type, offset) \
ACCESSORS_CHECKED(holder, name, type, offset, true)
#define SYNCHRONIZED_ACCESSORS_CHECKED2(holder, name, type, offset, \
get_condition, set_condition) \
DEF_GETTER(holder, name, type) { \
type value = TaggedField<type, offset>::Acquire_Load(isolate, *this); \
DCHECK(get_condition); \
return value; \
} \
void holder::set_##name(type value, WriteBarrierMode mode) { \
DCHECK(set_condition); \
TaggedField<type, offset>::Release_Store(*this, value); \
CONDITIONAL_WRITE_BARRIER(*this, offset, value, mode); \
}
#define SYNCHRONIZED_ACCESSORS_CHECKED(holder, name, type, offset, condition) \
SYNCHRONIZED_ACCESSORS_CHECKED2(holder, name, type, offset, condition, \
condition)
#define SYNCHRONIZED_ACCESSORS(holder, name, type, offset) \
SYNCHRONIZED_ACCESSORS_CHECKED(holder, name, type, offset, true)
#define WEAK_ACCESSORS_CHECKED2(holder, name, offset, get_condition, \
set_condition) \
DEF_GETTER(holder, name, MaybeObject) { \
MaybeObject value = \
TaggedField<MaybeObject, offset>::load(isolate, *this); \
DCHECK(get_condition); \
return value; \
} \
void holder::set_##name(MaybeObject value, WriteBarrierMode mode) { \
DCHECK(set_condition); \
TaggedField<MaybeObject, offset>::store(*this, value); \
CONDITIONAL_WEAK_WRITE_BARRIER(*this, offset, value, mode); \
}
#define WEAK_ACCESSORS_CHECKED(holder, name, offset, condition) \
WEAK_ACCESSORS_CHECKED2(holder, name, offset, condition, condition)
#define WEAK_ACCESSORS(holder, name, offset) \
WEAK_ACCESSORS_CHECKED(holder, name, offset, true)
// Getter that returns a Smi as an int and writes an int as a Smi.
#define SMI_ACCESSORS_CHECKED(holder, name, offset, condition) \
int holder::name() const { \
DCHECK(condition); \
Smi value = TaggedField<Smi, offset>::load(*this); \
return value.value(); \
} \
void holder::set_##name(int value) { \
DCHECK(condition); \
TaggedField<Smi, offset>::store(*this, Smi::FromInt(value)); \
}
#define SMI_ACCESSORS(holder, name, offset) \
SMI_ACCESSORS_CHECKED(holder, name, offset, true)
#define SYNCHRONIZED_SMI_ACCESSORS(holder, name, offset) \
int holder::synchronized_##name() const { \
Smi value = TaggedField<Smi, offset>::Acquire_Load(*this); \
return value.value(); \
} \
void holder::synchronized_set_##name(int value) { \
TaggedField<Smi, offset>::Release_Store(*this, Smi::FromInt(value)); \
}
#define RELAXED_SMI_ACCESSORS(holder, name, offset) \
int holder::relaxed_read_##name() const { \
Smi value = TaggedField<Smi, offset>::Relaxed_Load(*this); \
return value.value(); \
} \
void holder::relaxed_write_##name(int value) { \
TaggedField<Smi, offset>::Relaxed_Store(*this, Smi::FromInt(value)); \
}
#define TQ_SMI_ACCESSORS(holder, name) \
int holder::name() const { \
return TorqueGenerated##holder<holder, Super>::name().value(); \
} \
void holder::set_##name(int value) { \
TorqueGenerated##holder<holder, Super>::set_##name(Smi::FromInt(value)); \
}
#define BOOL_GETTER(holder, field, name, offset) \
bool holder::name() const { return BooleanBit::get(field(), offset); }
#define BOOL_ACCESSORS(holder, field, name, offset) \
bool holder::name() const { return BooleanBit::get(field(), offset); } \
void holder::set_##name(bool value) { \
set_##field(BooleanBit::set(field(), offset, value)); \
}
#define BIT_FIELD_ACCESSORS(holder, field, name, BitField) \
typename BitField::FieldType holder::name() const { \
return BitField::decode(field()); \
} \
void holder::set_##name(typename BitField::FieldType value) { \
set_##field(BitField::update(field(), value)); \
}
#define INSTANCE_TYPE_CHECKER(type, forinstancetype) \
V8_INLINE bool Is##type(InstanceType instance_type) { \
return instance_type == forinstancetype; \
}
#define TYPE_CHECKER(type, ...) \
DEF_GETTER(HeapObject, Is##type, bool) { \
return InstanceTypeChecker::Is##type(map(isolate).instance_type()); \
}
#define RELAXED_INT16_ACCESSORS(holder, name, offset) \
int16_t holder::name() const { \
return RELAXED_READ_INT16_FIELD(*this, offset); \
} \
void holder::set_##name(int16_t value) { \
RELAXED_WRITE_INT16_FIELD(*this, offset, value); \
}
#define FIELD_ADDR(p, offset) ((p).ptr() + offset - kHeapObjectTag)
#define ACQUIRE_READ_FIELD(p, offset) \
TaggedField<Object>::Acquire_Load(p, offset)
#define RELAXED_READ_FIELD(p, offset) \
TaggedField<Object>::Relaxed_Load(p, offset)
#define RELAXED_READ_WEAK_FIELD(p, offset) \
TaggedField<MaybeObject>::Relaxed_Load(p, offset)
#define WRITE_FIELD(p, offset, value) \
TaggedField<Object>::store(p, offset, value)
#define RELEASE_WRITE_FIELD(p, offset, value) \
TaggedField<Object>::Release_Store(p, offset, value)
#define RELAXED_WRITE_FIELD(p, offset, value) \
TaggedField<Object>::Relaxed_Store(p, offset, value)
#define RELAXED_WRITE_WEAK_FIELD(p, offset, value) \
TaggedField<MaybeObject>::Relaxed_Store(p, offset, value)
#ifdef V8_DISABLE_WRITE_BARRIERS
#define WRITE_BARRIER(object, offset, value)
#else
#define WRITE_BARRIER(object, offset, value) \
do { \
DCHECK_NOT_NULL(GetHeapFromWritableObject(object)); \
MarkingBarrier(object, (object).RawField(offset), value); \
GenerationalBarrier(object, (object).RawField(offset), value); \
} while (false)
#endif
#ifdef V8_DISABLE_WRITE_BARRIERS
#define WEAK_WRITE_BARRIER(object, offset, value)
#else
#define WEAK_WRITE_BARRIER(object, offset, value) \
do { \
DCHECK_NOT_NULL(GetHeapFromWritableObject(object)); \
MarkingBarrier(object, (object).RawMaybeWeakField(offset), value); \
GenerationalBarrier(object, (object).RawMaybeWeakField(offset), value); \
} while (false)
#endif
#ifdef V8_DISABLE_WRITE_BARRIERS
#define EPHEMERON_KEY_WRITE_BARRIER(object, offset, value)
#else
#define EPHEMERON_KEY_WRITE_BARRIER(object, offset, value) \
do { \
DCHECK_NOT_NULL(GetHeapFromWritableObject(object)); \
EphemeronHashTable table = EphemeronHashTable::cast(object); \
MarkingBarrier(object, (object).RawField(offset), value); \
GenerationalEphemeronKeyBarrier(table, (object).RawField(offset), value); \
} while (false)
#endif
#ifdef V8_DISABLE_WRITE_BARRIERS
#define CONDITIONAL_WRITE_BARRIER(object, offset, value, mode)
#else
#define CONDITIONAL_WRITE_BARRIER(object, offset, value, mode) \
do { \
DCHECK_NOT_NULL(GetHeapFromWritableObject(object)); \
DCHECK_NE(mode, UPDATE_EPHEMERON_KEY_WRITE_BARRIER); \
if (mode != SKIP_WRITE_BARRIER) { \
if (mode == UPDATE_WRITE_BARRIER) { \
MarkingBarrier(object, (object).RawField(offset), value); \
} \
GenerationalBarrier(object, (object).RawField(offset), value); \
} \
} while (false)
#endif
#ifdef V8_DISABLE_WRITE_BARRIERS
#define CONDITIONAL_WEAK_WRITE_BARRIER(object, offset, value, mode)
#else
#define CONDITIONAL_WEAK_WRITE_BARRIER(object, offset, value, mode) \
do { \
DCHECK_NOT_NULL(GetHeapFromWritableObject(object)); \
DCHECK_NE(mode, UPDATE_EPHEMERON_KEY_WRITE_BARRIER); \
if (mode != SKIP_WRITE_BARRIER) { \
if (mode == UPDATE_WRITE_BARRIER) { \
MarkingBarrier(object, (object).RawMaybeWeakField(offset), value); \
} \
GenerationalBarrier(object, (object).RawMaybeWeakField(offset), value); \
} \
} while (false)
#endif
#ifdef V8_DISABLE_WRITE_BARRIERS
#define CONDITIONAL_EPHEMERON_KEY_WRITE_BARRIER(object, offset, value, mode)
#else
#define CONDITIONAL_EPHEMERON_KEY_WRITE_BARRIER(object, offset, value, mode) \
do { \
DCHECK_NOT_NULL(GetHeapFromWritableObject(object)); \
DCHECK_NE(mode, UPDATE_EPHEMERON_KEY_WRITE_BARRIER); \
EphemeronHashTable table = EphemeronHashTable::cast(object); \
if (mode != SKIP_WRITE_BARRIER) { \
if (mode == UPDATE_WRITE_BARRIER) { \
MarkingBarrier(object, (object).RawField(offset), value); \
} \
GenerationalEphemeronKeyBarrier(table, (object).RawField(offset), \
value); \
} \
} while (false)
#endif
#define ACQUIRE_READ_INT32_FIELD(p, offset) \
static_cast<int32_t>(base::Acquire_Load( \
reinterpret_cast<const base::Atomic32*>(FIELD_ADDR(p, offset))))
#define RELAXED_WRITE_INT8_FIELD(p, offset, value) \
base::Relaxed_Store(reinterpret_cast<base::Atomic8*>(FIELD_ADDR(p, offset)), \
static_cast<base::Atomic8>(value));
#define RELAXED_READ_INT8_FIELD(p, offset) \
static_cast<int8_t>(base::Relaxed_Load( \
reinterpret_cast<const base::Atomic8*>(FIELD_ADDR(p, offset))))
#define RELAXED_READ_INT16_FIELD(p, offset) \
static_cast<int16_t>(base::Relaxed_Load( \
reinterpret_cast<const base::Atomic16*>(FIELD_ADDR(p, offset))))
#define RELAXED_WRITE_INT16_FIELD(p, offset, value) \
base::Relaxed_Store( \
reinterpret_cast<base::Atomic16*>(FIELD_ADDR(p, offset)), \
static_cast<base::Atomic16>(value));
#define RELAXED_READ_UINT32_FIELD(p, offset) \
static_cast<uint32_t>(base::Relaxed_Load( \
reinterpret_cast<const base::Atomic32*>(FIELD_ADDR(p, offset))))
#define RELAXED_WRITE_UINT32_FIELD(p, offset, value) \
base::Relaxed_Store( \
reinterpret_cast<base::Atomic32*>(FIELD_ADDR(p, offset)), \
static_cast<base::Atomic32>(value));
#define RELAXED_READ_INT32_FIELD(p, offset) \
static_cast<int32_t>(base::Relaxed_Load( \
reinterpret_cast<const base::Atomic32*>(FIELD_ADDR(p, offset))))
#define RELEASE_WRITE_INT32_FIELD(p, offset, value) \
base::Release_Store( \
reinterpret_cast<base::Atomic32*>(FIELD_ADDR(p, offset)), \
static_cast<base::Atomic32>(value))
#define RELAXED_WRITE_INT32_FIELD(p, offset, value) \
base::Relaxed_Store( \
reinterpret_cast<base::Atomic32*>(FIELD_ADDR(p, offset)), \
static_cast<base::Atomic32>(value));
#define RELAXED_READ_BYTE_FIELD(p, offset) \
static_cast<byte>(base::Relaxed_Load( \
reinterpret_cast<const base::Atomic8*>(FIELD_ADDR(p, offset))))
#define RELAXED_WRITE_BYTE_FIELD(p, offset, value) \
base::Relaxed_Store(reinterpret_cast<base::Atomic8*>(FIELD_ADDR(p, offset)), \
static_cast<base::Atomic8>(value));
#ifdef OBJECT_PRINT
#define DECL_PRINTER(Name) void Name##Print(std::ostream& os); // NOLINT
#else
#define DECL_PRINTER(Name)
#endif
#ifdef VERIFY_HEAP
#define DECL_VERIFIER(Name) void Name##Verify(Isolate* isolate);
#define EXPORT_DECL_VERIFIER(Name) \
V8_EXPORT_PRIVATE void Name##Verify(Isolate* isolate);
#else
#define DECL_VERIFIER(Name)
#define EXPORT_DECL_VERIFIER(Name)
#endif
#define DEFINE_DEOPT_ELEMENT_ACCESSORS(name, type) \
type DeoptimizationData::name() const { \
return type::cast(get(k##name##Index)); \
} \
void DeoptimizationData::Set##name(type value) { set(k##name##Index, value); }
#define DEFINE_DEOPT_ENTRY_ACCESSORS(name, type) \
type DeoptimizationData::name(int i) const { \
return type::cast(get(IndexForEntry(i) + k##name##Offset)); \
} \
void DeoptimizationData::Set##name(int i, type value) { \
set(IndexForEntry(i) + k##name##Offset, value); \
}
#define TQ_OBJECT_CONSTRUCTORS(Type) \
public: \
constexpr Type() = default; \
\
protected: \
template <typename TFieldType, int kFieldOffset> \
friend class TaggedField; \
\
inline explicit Type(Address ptr); \
friend class TorqueGenerated##Type<Type, Super>;
#define TQ_OBJECT_CONSTRUCTORS_IMPL(Type) \
inline Type::Type(Address ptr) \
: TorqueGenerated##Type<Type, Type::Super>(ptr) {}
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