trusted-object-inl.h

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// Copyright 2023 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.
 
#ifndef V8_OBJECTS_TRUSTED_OBJECT_INL_H_
#define V8_OBJECTS_TRUSTED_OBJECT_INL_H_
 
#include "src/objects/trusted-object.h"
// Include the non-inl header before the rest of the headers.
 
#include "src/objects/heap-object-inl.h"
#include "src/objects/instance-type-inl.h"
#include "src/sandbox/sandbox.h"
 
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
 
namespace v8 {
namespace internal {
 
OBJECT_CONSTRUCTORS_IMPL(TrustedObject, HeapObject)
 
Tagged<TrustedObject> TrustedObject::ReadProtectedPointerField(
    int offset) const {
  return TaggedField<TrustedObject, 0, TrustedSpaceCompressionScheme>::load(
      *this, offset);
}
 
Tagged<TrustedObject> TrustedObject::ReadProtectedPointerField(
    int offset, AcquireLoadTag) const {
  return TaggedField<TrustedObject, 0,
                     TrustedSpaceCompressionScheme>::Acquire_Load(*this,
                                                                  offset);
}
 
void TrustedObject::WriteProtectedPointerField(int offset,
                                               Tagged<TrustedObject> value) {
  TaggedField<TrustedObject, 0, TrustedSpaceCompressionScheme>::store(
      *this, offset, value);
}
 
void TrustedObject::WriteProtectedPointerField(int offset,
                                               Tagged<TrustedObject> value,
                                               ReleaseStoreTag) {
  TaggedField<TrustedObject, 0, TrustedSpaceCompressionScheme>::Release_Store(
      *this, offset, value);
}
 
bool TrustedObject::IsProtectedPointerFieldEmpty(int offset) const {
  return TaggedField<Object, 0, TrustedSpaceCompressionScheme>::load(
             *this, offset) == Smi::zero();
}
 
bool TrustedObject::IsProtectedPointerFieldEmpty(int offset,
                                                 AcquireLoadTag) const {
  return TaggedField<Object, 0, TrustedSpaceCompressionScheme>::Acquire_Load(
             *this, offset) == Smi::zero();
}
 
void TrustedObject::ClearProtectedPointerField(int offset) {
  TaggedField<Object, 0, TrustedSpaceCompressionScheme>::store(*this, offset,
                                                               Smi::zero());
}
 
void TrustedObject::ClearProtectedPointerField(int offset, ReleaseStoreTag) {
  TaggedField<Object, 0, TrustedSpaceCompressionScheme>::Release_Store(
      *this, offset, Smi::zero());
}
 
ProtectedPointerSlot TrustedObject::RawProtectedPointerField(
    int byte_offset) const {
  return ProtectedPointerSlot(field_address(byte_offset));
}
 
ProtectedMaybeObjectSlot TrustedObject::RawProtectedMaybeObjectField(
    int byte_offset) const {
  return ProtectedMaybeObjectSlot(field_address(byte_offset));
}
 
#ifdef VERIFY_HEAP
void TrustedObject::VerifyProtectedPointerField(Isolate* isolate, int offset) {
  Object::VerifyPointer(isolate, ReadProtectedPointerField(offset));
}
#endif
 
OBJECT_CONSTRUCTORS_IMPL(ExposedTrustedObject, TrustedObject)
 
void ExposedTrustedObject::init_self_indirect_pointer(Isolate* isolate) {
#ifdef V8_ENABLE_SANDBOX
  InitSelfIndirectPointerField(kSelfIndirectPointerOffset, isolate,
                               isolate->trusted_pointer_publishing_scope());
#endif
}
 
void ExposedTrustedObject::init_self_indirect_pointer(LocalIsolate* isolate) {
#ifdef V8_ENABLE_SANDBOX
  // Background threads using LocalIsolates don't use
  // TrustedPointerPublishingScopes.
  InitSelfIndirectPointerField(kSelfIndirectPointerOffset, isolate, nullptr);
#endif
}
 
IndirectPointerHandle ExposedTrustedObject::self_indirect_pointer_handle()
    const {
#ifdef V8_ENABLE_SANDBOX
  return Relaxed_ReadField<IndirectPointerHandle>(kSelfIndirectPointerOffset);
#else
  UNREACHABLE();
#endif
}
 
}  // namespace internal
}  // namespace v8
 
#include "src/objects/object-macros-undef.h"
 
#endif  // V8_OBJECTS_TRUSTED_OBJECT_INL_H_