runtime/entrypoints/quick/quick_field_entrypoints.cc

/*
 * Copyright (C) 2012 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.
 */

#include <stdint.h>

#include "art_field-inl.h"
#include "art_method-inl.h"
#include "callee_save_frame.h"
#include "dex_file-inl.h"
#include "entrypoints/entrypoint_utils-inl.h"
#include "gc_root-inl.h"
#include "mirror/class-inl.h"
#include "mirror/object_reference.h"

namespace art {

template<FindFieldType type, bool kAccessCheck>
ALWAYS_INLINE static inline ArtField* FindInstanceField(uint32_t field_idx,
                                                        ArtMethod* referrer,
                                                        Thread* self,
                                                        size_t size,
                                                        mirror::Object** obj)
    REQUIRES(!Roles::uninterruptible_)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  StackHandleScope<1> hs(self);
  HandleWrapper<mirror::Object> h(hs.NewHandleWrapper(obj));
  ArtField* field = FindFieldFromCode<type, kAccessCheck>(field_idx, referrer, self, size);
  if (LIKELY(field != nullptr) && UNLIKELY(h.Get() == nullptr)) {
    ThrowNullPointerExceptionForFieldAccess(field, /*is_read*/FindFieldTypeIsRead(type));
    return nullptr;
  }
  return field;
}

extern "C" int8_t artGetByteStaticFromCode(uint32_t field_idx,
                                           ArtMethod* referrer,
                                           Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveRead, sizeof(int8_t));
  if (LIKELY(field != nullptr)) {
    return field->GetByte(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticPrimitiveRead, true>(field_idx, referrer, self, sizeof(int8_t));
  if (LIKELY(field != nullptr)) {
    return field->GetByte(field->GetDeclaringClass());
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint8_t artGetBooleanStaticFromCode(uint32_t field_idx,
                                               ArtMethod* referrer,
                                               Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveRead, sizeof(int8_t));
  if (LIKELY(field != nullptr)) {
    return field->GetBoolean(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticPrimitiveRead, true>(field_idx, referrer, self, sizeof(int8_t));
  if (LIKELY(field != nullptr)) {
    return field->GetBoolean(field->GetDeclaringClass());
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" int16_t artGetShortStaticFromCode(uint32_t field_idx,
                                             ArtMethod* referrer,
                                             Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveRead, sizeof(int16_t));
  if (LIKELY(field != nullptr)) {
    return field->GetShort(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticPrimitiveRead, true>(field_idx, referrer, self, sizeof(int16_t));
  if (LIKELY(field != nullptr)) {
    return field->GetShort(field->GetDeclaringClass());
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint16_t artGetCharStaticFromCode(uint32_t field_idx,
                                             ArtMethod* referrer,
                                             Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveRead, sizeof(int16_t));
  if (LIKELY(field != nullptr)) {
    return field->GetChar(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticPrimitiveRead, true>(field_idx, referrer, self, sizeof(int16_t));
  if (LIKELY(field != nullptr)) {
    return field->GetChar(field->GetDeclaringClass());
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint32_t artGet32StaticFromCode(uint32_t field_idx,
                                           ArtMethod* referrer,
                                           Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveRead, sizeof(int32_t));
  if (LIKELY(field != nullptr)) {
    return field->Get32(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticPrimitiveRead, true>(field_idx, referrer, self, sizeof(int32_t));
  if (LIKELY(field != nullptr)) {
    return field->Get32(field->GetDeclaringClass());
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint64_t artGet64StaticFromCode(uint32_t field_idx,
                                           ArtMethod* referrer,
                                           Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveRead, sizeof(int64_t));
  if (LIKELY(field != nullptr)) {
    return field->Get64(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticPrimitiveRead, true>(field_idx, referrer, self, sizeof(int64_t));
  if (LIKELY(field != nullptr)) {
    return field->Get64(field->GetDeclaringClass());
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" mirror::Object* artGetObjStaticFromCode(uint32_t field_idx,
                                                   ArtMethod* referrer,
                                                   Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx,
                                  referrer,
                                  StaticObjectRead,
                                  sizeof(mirror::HeapReference<mirror::Object>));
  if (LIKELY(field != nullptr)) {
    return field->GetObj(field->GetDeclaringClass());
  }
  field = FindFieldFromCode<StaticObjectRead, true>(field_idx,
                                                    referrer,
                                                    self,
                                                    sizeof(mirror::HeapReference<mirror::Object>));
  if (LIKELY(field != nullptr)) {
    return field->GetObj(field->GetDeclaringClass());
  }
  return nullptr;  // Will throw exception by checking with Thread::Current.
}

extern "C" int8_t artGetByteInstanceFromCode(uint32_t field_idx,
                                             mirror::Object* obj,
                                             ArtMethod* referrer,
                                             Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveRead, sizeof(int8_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->GetByte(obj);
  }
  field = FindInstanceField<InstancePrimitiveRead, true>(field_idx,
                                                         referrer,
                                                         self,
                                                         sizeof(int8_t),
                                                         &obj);
  if (LIKELY(field != nullptr)) {
    return field->GetByte(obj);
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint8_t artGetBooleanInstanceFromCode(uint32_t field_idx,
                                                 mirror::Object* obj,
                                                 ArtMethod* referrer,
                                                 Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveRead, sizeof(int8_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->GetBoolean(obj);
  }
  field = FindInstanceField<InstancePrimitiveRead, true>(field_idx,
                                                         referrer,
                                                         self,
                                                         sizeof(int8_t),
                                                         &obj);
  if (LIKELY(field != nullptr)) {
    return field->GetBoolean(obj);
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}
extern "C" int16_t artGetShortInstanceFromCode(uint32_t field_idx,
                                               mirror::Object* obj,
                                               ArtMethod* referrer,
                                               Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveRead, sizeof(int16_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->GetShort(obj);
  }
  field = FindInstanceField<InstancePrimitiveRead, true>(field_idx,
                                                         referrer,
                                                         self,
                                                         sizeof(int16_t),
                                                         &obj);
  if (LIKELY(field != nullptr)) {
    return field->GetShort(obj);
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint16_t artGetCharInstanceFromCode(uint32_t field_idx,
                                               mirror::Object* obj,
                                               ArtMethod* referrer,
                                               Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveRead, sizeof(int16_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->GetChar(obj);
  }
  field = FindInstanceField<InstancePrimitiveRead, true>(field_idx,
                                                         referrer,
                                                         self,
                                                         sizeof(int16_t),
                                                         &obj);
  if (LIKELY(field != nullptr)) {
    return field->GetChar(obj);
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint32_t artGet32InstanceFromCode(uint32_t field_idx,
                                             mirror::Object* obj,
                                             ArtMethod* referrer,
                                             Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveRead, sizeof(int32_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->Get32(obj);
  }
  field = FindInstanceField<InstancePrimitiveRead, true>(field_idx,
                                                         referrer,
                                                         self,
                                                         sizeof(int32_t),
                                                         &obj);
  if (LIKELY(field != nullptr)) {
    return field->Get32(obj);
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" uint64_t artGet64InstanceFromCode(uint32_t field_idx,
                                             mirror::Object* obj,
                                             ArtMethod* referrer,
                                             Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveRead, sizeof(int64_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->Get64(obj);
  }
  field = FindInstanceField<InstancePrimitiveRead, true>(field_idx,
                                                         referrer,
                                                         self,
                                                         sizeof(int64_t),
                                                         &obj);
  if (LIKELY(field != nullptr)) {
    return field->Get64(obj);
  }
  return 0;  // Will throw exception by checking with Thread::Current.
}

extern "C" mirror::Object* artGetObjInstanceFromCode(uint32_t field_idx,
                                                     mirror::Object* obj,
                                                     ArtMethod* referrer,
                                                     Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx,
                                  referrer,
                                  InstanceObjectRead,
                                  sizeof(mirror::HeapReference<mirror::Object>));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    return field->GetObj(obj);
  }
  field = FindInstanceField<InstanceObjectRead, true>(field_idx,
                                                      referrer,
                                                      self,
                                                      sizeof(mirror::HeapReference<mirror::Object>),
                                                      &obj);
  if (LIKELY(field != nullptr)) {
    return field->GetObj(obj);
  }
  return nullptr;  // Will throw exception by checking with Thread::Current.
}

extern "C" int artSet8StaticFromCode(uint32_t field_idx,
                                     uint32_t new_value,
                                     ArtMethod* referrer,
                                     Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveWrite, sizeof(int8_t));
  if (LIKELY(field != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimBoolean) {
      field->SetBoolean<false>(field->GetDeclaringClass(), new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimByte, type);
      field->SetByte<false>(field->GetDeclaringClass(), new_value);
    }
    return 0;  // success
  }
  field = FindFieldFromCode<StaticPrimitiveWrite, true>(field_idx, referrer, self, sizeof(int8_t));
  if (LIKELY(field != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimBoolean) {
      field->SetBoolean<false>(field->GetDeclaringClass(), new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimByte, type);
      field->SetByte<false>(field->GetDeclaringClass(), new_value);
    }
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet16StaticFromCode(uint32_t field_idx,
                                      uint16_t new_value,
                                      ArtMethod* referrer,
                                      Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveWrite, sizeof(int16_t));
  if (LIKELY(field != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimChar) {
      field->SetChar<false>(field->GetDeclaringClass(), new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimShort, type);
      field->SetShort<false>(field->GetDeclaringClass(), new_value);
    }
    return 0;  // success
  }
  field = FindFieldFromCode<StaticPrimitiveWrite, true>(field_idx, referrer, self, sizeof(int16_t));
  if (LIKELY(field != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimChar) {
      field->SetChar<false>(field->GetDeclaringClass(), new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimShort, type);
      field->SetShort<false>(field->GetDeclaringClass(), new_value);
    }
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet32StaticFromCode(uint32_t field_idx,
                                      uint32_t new_value,
                                      ArtMethod* referrer,
                                      Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveWrite, sizeof(int32_t));
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set32<false>(field->GetDeclaringClass(), new_value);
    return 0;  // success
  }
  field = FindFieldFromCode<StaticPrimitiveWrite, true>(field_idx, referrer, self, sizeof(int32_t));
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set32<false>(field->GetDeclaringClass(), new_value);
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet64StaticFromCode(uint32_t field_idx,
                                      ArtMethod* referrer,
                                      uint64_t new_value,
                                      Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, StaticPrimitiveWrite, sizeof(int64_t));
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set64<false>(field->GetDeclaringClass(), new_value);
    return 0;  // success
  }
  field = FindFieldFromCode<StaticPrimitiveWrite, true>(field_idx, referrer, self, sizeof(int64_t));
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set64<false>(field->GetDeclaringClass(), new_value);
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSetObjStaticFromCode(uint32_t field_idx,
                                       mirror::Object* new_value,
                                       ArtMethod* referrer,
                                       Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx,
                                  referrer,
                                  StaticObjectWrite,
                                  sizeof(mirror::HeapReference<mirror::Object>));
  if (LIKELY(field != nullptr)) {
    if (LIKELY(!field->IsPrimitiveType())) {
      // Compiled code can't use transactional mode.
      field->SetObj<false>(field->GetDeclaringClass(), new_value);
      return 0;  // success
    }
  }
  {
    StackHandleScope<1> hs(self);
    HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper(&new_value));
    field = FindFieldFromCode<StaticObjectWrite, true>(
        field_idx,
        referrer,
        self,
        sizeof(mirror::HeapReference<mirror::Object>));
  }
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->SetObj<false>(field->GetDeclaringClass(), new_value);
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet8InstanceFromCode(uint32_t field_idx,
                                       mirror::Object* obj,
                                       uint8_t new_value,
                                       ArtMethod* referrer,
                                       Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveWrite, sizeof(int8_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimBoolean) {
      field->SetBoolean<false>(obj, new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimByte, type);
      field->SetByte<false>(obj, new_value);
    }
    return 0;  // success
  }
  field = FindInstanceField<InstancePrimitiveWrite, true>(field_idx,
                                                          referrer,
                                                          self,
                                                          sizeof(int8_t),
                                                          &obj);
  if (LIKELY(field != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimBoolean) {
      field->SetBoolean<false>(obj, new_value);
    } else {
      field->SetByte<false>(obj, new_value);
    }
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet16InstanceFromCode(uint32_t field_idx,
                                        mirror::Object* obj,
                                        uint16_t new_value,
                                        ArtMethod* referrer,
                                        Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveWrite, sizeof(int16_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimChar) {
      field->SetChar<false>(obj, new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimShort, type);
      field->SetShort<false>(obj, new_value);
    }
    return 0;  // success
  }
  field = FindInstanceField<InstancePrimitiveWrite, true>(field_idx,
                                                          referrer,
                                                          self,
                                                          sizeof(int16_t),
                                                          &obj);
  if (LIKELY(field != nullptr)) {
    Primitive::Type type = field->GetTypeAsPrimitiveType();
    // Compiled code can't use transactional mode.
    if (type == Primitive::kPrimChar) {
      field->SetChar<false>(obj, new_value);
    } else {
      DCHECK_EQ(Primitive::kPrimShort, type);
      field->SetShort<false>(obj, new_value);
    }
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet32InstanceFromCode(uint32_t field_idx,
                                        mirror::Object* obj,
                                        uint32_t new_value,
                                        ArtMethod* referrer,
                                        Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveWrite, sizeof(int32_t));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set32<false>(obj, new_value);
    return 0;  // success
  }
  field = FindInstanceField<InstancePrimitiveWrite, true>(field_idx,
                                                          referrer,
                                                          self,
                                                          sizeof(int32_t),
                                                          &obj);
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set32<false>(obj, new_value);
    return 0;  // success
  }
  return -1;  // failure
}

extern "C" int artSet64InstanceFromCode(uint32_t field_idx,
                                        mirror::Object* obj,
                                        uint64_t new_value,
                                        ArtMethod* referrer,
                                        Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx, referrer, InstancePrimitiveWrite, sizeof(int64_t));
  if (LIKELY(field != nullptr  && obj != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set64<false>(obj, new_value);
    return 0;  // success
  }
  field = FindInstanceField<InstancePrimitiveWrite, true>(field_idx,
                                                          referrer,
                                                          self,
                                                          sizeof(int64_t),
                                                          &obj);
  if (LIKELY(field != nullptr)) {
    // Compiled code can't use transactional mode.
    field->Set64<false>(obj, new_value);
    return 0;
  }
  return -1;  // failure
}

extern "C" int artSetObjInstanceFromCode(uint32_t field_idx,
                                         mirror::Object* obj,
                                         mirror::Object* new_value,
                                         ArtMethod* referrer,
                                         Thread* self)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  ScopedQuickEntrypointChecks sqec(self);
  ArtField* field = FindFieldFast(field_idx,
                                  referrer,
                                  InstanceObjectWrite,
                                  sizeof(mirror::HeapReference<mirror::Object>));
  if (LIKELY(field != nullptr && obj != nullptr)) {
    // Compiled code can't use transactional mode.
    field->SetObj<false>(obj, new_value);
    return 0;  // success
  }
  {
    StackHandleScope<2> hs(self);
    HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper(&obj));
    HandleWrapper<mirror::Object> h_new_value(hs.NewHandleWrapper(&new_value));
    field = FindFieldFromCode<InstanceObjectWrite, true>(
        field_idx,
        referrer,
        self,
        sizeof(mirror::HeapReference<mirror::Object>));
  }
  if (LIKELY(field != nullptr)) {
    if (UNLIKELY(obj == nullptr)) {
      ThrowNullPointerExceptionForFieldAccess(field, false);
    } else {
      // Compiled code can't use transactional mode.
      field->SetObj<false>(obj, new_value);
      return 0;  // success
    }
  }
  return -1;  // failure
}

extern "C" mirror::Object* artReadBarrierMark(mirror::Object* obj) {
  DCHECK(kEmitCompilerReadBarrier);
  return ReadBarrier::Mark(obj);
}

extern "C" mirror::Object* artReadBarrierSlow(mirror::Object* ref ATTRIBUTE_UNUSED,
                                              mirror::Object* obj,
                                              uint32_t offset) {
  DCHECK(kEmitCompilerReadBarrier);
  uint8_t* raw_addr = reinterpret_cast<uint8_t*>(obj) + offset;
  mirror::HeapReference<mirror::Object>* ref_addr =
     reinterpret_cast<mirror::HeapReference<mirror::Object>*>(raw_addr);
  constexpr ReadBarrierOption kReadBarrierOption =
      kUseReadBarrier ? kWithReadBarrier : kWithoutReadBarrier;
  mirror::Object* result =
      ReadBarrier::Barrier<mirror::Object, kReadBarrierOption>(obj,
                                                               MemberOffset(offset),
                                                               ref_addr);
  return result;
}

extern "C" mirror::Object* artReadBarrierForRootSlow(GcRoot<mirror::Object>* root) {
  DCHECK(kEmitCompilerReadBarrier);
  return root->Read();
}

}  // namespace art