| /* |
| * Copyright (C) 2015 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 "intrinsics.h" |
| |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/utils.h" |
| #include "class_linker.h" |
| #include "dex/invoke_type.h" |
| #include "driver/compiler_options.h" |
| #include "gc/space/image_space.h" |
| #include "image-inl.h" |
| #include "intrinsic_objects.h" |
| #include "nodes.h" |
| #include "obj_ptr-inl.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "thread-current-inl.h" |
| |
| namespace art { |
| |
| // Check that intrinsic enum values fit within space set aside in ArtMethod modifier flags. |
| #define CHECK_INTRINSICS_ENUM_VALUES(Name, IsStatic, NeedsEnvironmentOrCache, SideEffects, Exceptions, ...) \ |
| static_assert( \ |
| static_cast<uint32_t>(Intrinsics::k ## Name) <= (kAccIntrinsicBits >> CTZ(kAccIntrinsicBits)), \ |
| "Instrinsics enumeration space overflow."); |
| #include "intrinsics_list.h" |
| INTRINSICS_LIST(CHECK_INTRINSICS_ENUM_VALUES) |
| #undef INTRINSICS_LIST |
| #undef CHECK_INTRINSICS_ENUM_VALUES |
| |
| // Function that returns whether an intrinsic is static/direct or virtual. |
| static inline InvokeType GetIntrinsicInvokeType(Intrinsics i) { |
| switch (i) { |
| case Intrinsics::kNone: |
| return kInterface; // Non-sensical for intrinsic. |
| #define OPTIMIZING_INTRINSICS(Name, IsStatic, NeedsEnvironmentOrCache, SideEffects, Exceptions, ...) \ |
| case Intrinsics::k ## Name: \ |
| return IsStatic; |
| #include "intrinsics_list.h" |
| INTRINSICS_LIST(OPTIMIZING_INTRINSICS) |
| #undef INTRINSICS_LIST |
| #undef OPTIMIZING_INTRINSICS |
| } |
| return kInterface; |
| } |
| |
| // Function that returns whether an intrinsic needs an environment or not. |
| static inline IntrinsicNeedsEnvironmentOrCache NeedsEnvironmentOrCache(Intrinsics i) { |
| switch (i) { |
| case Intrinsics::kNone: |
| return kNeedsEnvironmentOrCache; // Non-sensical for intrinsic. |
| #define OPTIMIZING_INTRINSICS(Name, IsStatic, NeedsEnvironmentOrCache, SideEffects, Exceptions, ...) \ |
| case Intrinsics::k ## Name: \ |
| return NeedsEnvironmentOrCache; |
| #include "intrinsics_list.h" |
| INTRINSICS_LIST(OPTIMIZING_INTRINSICS) |
| #undef INTRINSICS_LIST |
| #undef OPTIMIZING_INTRINSICS |
| } |
| return kNeedsEnvironmentOrCache; |
| } |
| |
| // Function that returns whether an intrinsic has side effects. |
| static inline IntrinsicSideEffects GetSideEffects(Intrinsics i) { |
| switch (i) { |
| case Intrinsics::kNone: |
| return kAllSideEffects; |
| #define OPTIMIZING_INTRINSICS(Name, IsStatic, NeedsEnvironmentOrCache, SideEffects, Exceptions, ...) \ |
| case Intrinsics::k ## Name: \ |
| return SideEffects; |
| #include "intrinsics_list.h" |
| INTRINSICS_LIST(OPTIMIZING_INTRINSICS) |
| #undef INTRINSICS_LIST |
| #undef OPTIMIZING_INTRINSICS |
| } |
| return kAllSideEffects; |
| } |
| |
| // Function that returns whether an intrinsic can throw exceptions. |
| static inline IntrinsicExceptions GetExceptions(Intrinsics i) { |
| switch (i) { |
| case Intrinsics::kNone: |
| return kCanThrow; |
| #define OPTIMIZING_INTRINSICS(Name, IsStatic, NeedsEnvironmentOrCache, SideEffects, Exceptions, ...) \ |
| case Intrinsics::k ## Name: \ |
| return Exceptions; |
| #include "intrinsics_list.h" |
| INTRINSICS_LIST(OPTIMIZING_INTRINSICS) |
| #undef INTRINSICS_LIST |
| #undef OPTIMIZING_INTRINSICS |
| } |
| return kCanThrow; |
| } |
| |
| static bool CheckInvokeType(Intrinsics intrinsic, HInvoke* invoke) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Whenever the intrinsic is marked as static, report an error if we find an InvokeVirtual. |
| // |
| // Whenever the intrinsic is marked as direct and we find an InvokeVirtual, a devirtualization |
| // failure occured. We might be in a situation where we have inlined a method that calls an |
| // intrinsic, but that method is in a different dex file on which we do not have a |
| // verified_method that would have helped the compiler driver sharpen the call. In that case, |
| // make sure that the intrinsic is actually for some final method (or in a final class), as |
| // otherwise the intrinsics setup is broken. |
| // |
| // For the last direction, we have intrinsics for virtual functions that will perform a check |
| // inline. If the precise type is known, however, the instruction will be sharpened to an |
| // InvokeStaticOrDirect. |
| InvokeType intrinsic_type = GetIntrinsicInvokeType(intrinsic); |
| InvokeType invoke_type = invoke->GetInvokeType(); |
| |
| switch (intrinsic_type) { |
| case kStatic: |
| return (invoke_type == kStatic); |
| |
| case kDirect: |
| if (invoke_type == kDirect) { |
| return true; |
| } |
| if (invoke_type == kVirtual) { |
| ArtMethod* art_method = invoke->GetResolvedMethod(); |
| return (art_method->IsFinal() || art_method->GetDeclaringClass()->IsFinal()); |
| } |
| return false; |
| |
| case kVirtual: |
| // Call might be devirtualized. |
| return (invoke_type == kVirtual || invoke_type == kDirect || invoke_type == kInterface); |
| |
| case kSuper: |
| case kInterface: |
| case kPolymorphic: |
| case kCustom: |
| return false; |
| } |
| LOG(FATAL) << "Unknown intrinsic invoke type: " << intrinsic_type; |
| UNREACHABLE(); |
| } |
| |
| bool IntrinsicsRecognizer::Recognize(HInvoke* invoke, |
| ArtMethod* art_method, |
| /*out*/ bool* wrong_invoke_type) { |
| if (art_method == nullptr) { |
| art_method = invoke->GetResolvedMethod(); |
| } |
| *wrong_invoke_type = false; |
| if (art_method == nullptr || !art_method->IsIntrinsic()) { |
| return false; |
| } |
| |
| // TODO: b/65872996 The intent is that polymorphic signature methods should |
| // be compiler intrinsics. At present, they are only interpreter intrinsics. |
| if (art_method->IsPolymorphicSignature()) { |
| return false; |
| } |
| |
| Intrinsics intrinsic = static_cast<Intrinsics>(art_method->GetIntrinsic()); |
| if (CheckInvokeType(intrinsic, invoke) == false) { |
| *wrong_invoke_type = true; |
| return false; |
| } |
| |
| invoke->SetIntrinsic(intrinsic, |
| NeedsEnvironmentOrCache(intrinsic), |
| GetSideEffects(intrinsic), |
| GetExceptions(intrinsic)); |
| return true; |
| } |
| |
| bool IntrinsicsRecognizer::Run() { |
| bool didRecognize = false; |
| ScopedObjectAccess soa(Thread::Current()); |
| for (HBasicBlock* block : graph_->GetReversePostOrder()) { |
| for (HInstructionIterator inst_it(block->GetInstructions()); !inst_it.Done(); |
| inst_it.Advance()) { |
| HInstruction* inst = inst_it.Current(); |
| if (inst->IsInvoke()) { |
| bool wrong_invoke_type = false; |
| if (Recognize(inst->AsInvoke(), /* art_method */ nullptr, &wrong_invoke_type)) { |
| didRecognize = true; |
| MaybeRecordStat(stats_, MethodCompilationStat::kIntrinsicRecognized); |
| } else if (wrong_invoke_type) { |
| LOG(WARNING) |
| << "Found an intrinsic with unexpected invoke type: " |
| << inst->AsInvoke()->GetResolvedMethod()->PrettyMethod() << " " |
| << inst->DebugName(); |
| } |
| } |
| } |
| } |
| return didRecognize; |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const Intrinsics& intrinsic) { |
| switch (intrinsic) { |
| case Intrinsics::kNone: |
| os << "None"; |
| break; |
| #define OPTIMIZING_INTRINSICS(Name, IsStatic, NeedsEnvironmentOrCache, SideEffects, Exceptions, ...) \ |
| case Intrinsics::k ## Name: \ |
| os << # Name; \ |
| break; |
| #include "intrinsics_list.h" |
| INTRINSICS_LIST(OPTIMIZING_INTRINSICS) |
| #undef STATIC_INTRINSICS_LIST |
| #undef VIRTUAL_INTRINSICS_LIST |
| #undef OPTIMIZING_INTRINSICS |
| } |
| return os; |
| } |
| |
| static const char kIntegerCacheDescriptor[] = "Ljava/lang/Integer$IntegerCache;"; |
| static const char kIntegerDescriptor[] = "Ljava/lang/Integer;"; |
| static const char kIntegerArrayDescriptor[] = "[Ljava/lang/Integer;"; |
| static const char kLowFieldName[] = "low"; |
| static const char kHighFieldName[] = "high"; |
| static const char kValueFieldName[] = "value"; |
| |
| static ObjPtr<mirror::ObjectArray<mirror::Object>> GetBootImageLiveObjects() |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| const std::vector<gc::space::ImageSpace*>& boot_image_spaces = heap->GetBootImageSpaces(); |
| DCHECK(!boot_image_spaces.empty()); |
| const ImageHeader& main_header = boot_image_spaces[0]->GetImageHeader(); |
| ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects = |
| ObjPtr<mirror::ObjectArray<mirror::Object>>::DownCast( |
| main_header.GetImageRoot<kWithoutReadBarrier>(ImageHeader::kBootImageLiveObjects)); |
| DCHECK(boot_image_live_objects != nullptr); |
| DCHECK(heap->ObjectIsInBootImageSpace(boot_image_live_objects)); |
| return boot_image_live_objects; |
| } |
| |
| static ObjPtr<mirror::Class> LookupInitializedClass(Thread* self, |
| ClassLinker* class_linker, |
| const char* descriptor) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| ObjPtr<mirror::Class> klass = |
| class_linker->LookupClass(self, descriptor, /* class_loader */ nullptr); |
| DCHECK(klass != nullptr); |
| DCHECK(klass->IsInitialized()); |
| return klass; |
| } |
| |
| static ObjPtr<mirror::ObjectArray<mirror::Object>> GetIntegerCacheArray( |
| ObjPtr<mirror::Class> cache_class) REQUIRES_SHARED(Locks::mutator_lock_) { |
| ArtField* cache_field = cache_class->FindDeclaredStaticField("cache", kIntegerArrayDescriptor); |
| DCHECK(cache_field != nullptr); |
| return ObjPtr<mirror::ObjectArray<mirror::Object>>::DownCast(cache_field->GetObject(cache_class)); |
| } |
| |
| static int32_t GetIntegerCacheField(ObjPtr<mirror::Class> cache_class, const char* field_name) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| ArtField* field = cache_class->FindDeclaredStaticField(field_name, "I"); |
| DCHECK(field != nullptr); |
| return field->GetInt(cache_class); |
| } |
| |
| static bool CheckIntegerCache(Thread* self, |
| ClassLinker* class_linker, |
| ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects, |
| ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_cache) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(boot_image_cache != nullptr); |
| |
| // Since we have a cache in the boot image, both java.lang.Integer and |
| // java.lang.Integer$IntegerCache must be initialized in the boot image. |
| ObjPtr<mirror::Class> cache_class = |
| LookupInitializedClass(self, class_linker, kIntegerCacheDescriptor); |
| ObjPtr<mirror::Class> integer_class = |
| LookupInitializedClass(self, class_linker, kIntegerDescriptor); |
| |
| // Check that the current cache is the same as the `boot_image_cache`. |
| ObjPtr<mirror::ObjectArray<mirror::Object>> current_cache = GetIntegerCacheArray(cache_class); |
| if (current_cache != boot_image_cache) { |
| return false; // Messed up IntegerCache.cache. |
| } |
| |
| // Check that the range matches the boot image cache length. |
| int32_t low = GetIntegerCacheField(cache_class, kLowFieldName); |
| int32_t high = GetIntegerCacheField(cache_class, kHighFieldName); |
| if (boot_image_cache->GetLength() != high - low + 1) { |
| return false; // Messed up IntegerCache.low or IntegerCache.high. |
| } |
| |
| // Check that the elements match the boot image intrinsic objects and check their values as well. |
| ArtField* value_field = integer_class->FindDeclaredInstanceField(kValueFieldName, "I"); |
| DCHECK(value_field != nullptr); |
| for (int32_t i = 0, len = boot_image_cache->GetLength(); i != len; ++i) { |
| ObjPtr<mirror::Object> boot_image_object = |
| IntrinsicObjects::GetIntegerValueOfObject(boot_image_live_objects, i); |
| DCHECK(Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(boot_image_object)); |
| // No need for read barrier for comparison with a boot image object. |
| ObjPtr<mirror::Object> current_object = |
| boot_image_cache->GetWithoutChecks<kVerifyNone, kWithoutReadBarrier>(i); |
| if (boot_image_object != current_object) { |
| return false; // Messed up IntegerCache.cache[i] |
| } |
| if (value_field->GetInt(boot_image_object) != low + i) { |
| return false; // Messed up IntegerCache.cache[i].value. |
| } |
| } |
| |
| return true; |
| } |
| |
| void IntrinsicVisitor::ComputeIntegerValueOfLocations(HInvoke* invoke, |
| CodeGenerator* codegen, |
| Location return_location, |
| Location first_argument_location) { |
| // The intrinsic will call if it needs to allocate a j.l.Integer. |
| LocationSummary::CallKind call_kind = LocationSummary::kCallOnMainOnly; |
| const CompilerOptions& compiler_options = codegen->GetCompilerOptions(); |
| if (compiler_options.IsBootImage()) { |
| // Piggyback on the method load kind to determine whether we can use PC-relative addressing. |
| // This should cover both the testing config (non-PIC boot image) and codegens that reject |
| // PC-relative load kinds and fall back to the runtime call. |
| if (!invoke->AsInvokeStaticOrDirect()->HasPcRelativeMethodLoadKind()) { |
| return; |
| } |
| if (!compiler_options.IsImageClass(kIntegerCacheDescriptor) || |
| !compiler_options.IsImageClass(kIntegerDescriptor)) { |
| return; |
| } |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| Thread* self = Thread::Current(); |
| ScopedObjectAccess soa(self); |
| ObjPtr<mirror::Class> cache_class = class_linker->LookupClass( |
| self, kIntegerCacheDescriptor, /* class_loader */ nullptr); |
| DCHECK(cache_class != nullptr); |
| if (UNLIKELY(!cache_class->IsInitialized())) { |
| LOG(WARNING) << "Image class " << cache_class->PrettyDescriptor() << " is uninitialized."; |
| return; |
| } |
| ObjPtr<mirror::Class> integer_class = |
| class_linker->LookupClass(self, kIntegerDescriptor, /* class_loader */ nullptr); |
| DCHECK(integer_class != nullptr); |
| if (UNLIKELY(!integer_class->IsInitialized())) { |
| LOG(WARNING) << "Image class " << integer_class->PrettyDescriptor() << " is uninitialized."; |
| return; |
| } |
| int32_t low = GetIntegerCacheField(cache_class, kLowFieldName); |
| int32_t high = GetIntegerCacheField(cache_class, kHighFieldName); |
| if (kIsDebugBuild) { |
| ObjPtr<mirror::ObjectArray<mirror::Object>> current_cache = GetIntegerCacheArray(cache_class); |
| CHECK(current_cache != nullptr); |
| CHECK_EQ(current_cache->GetLength(), high - low + 1); |
| ArtField* value_field = integer_class->FindDeclaredInstanceField(kValueFieldName, "I"); |
| CHECK(value_field != nullptr); |
| for (int32_t i = 0, len = current_cache->GetLength(); i != len; ++i) { |
| ObjPtr<mirror::Object> current_object = current_cache->GetWithoutChecks(i); |
| CHECK(current_object != nullptr); |
| CHECK_EQ(value_field->GetInt(current_object), low + i); |
| } |
| } |
| if (invoke->InputAt(0)->IsIntConstant()) { |
| int32_t value = invoke->InputAt(0)->AsIntConstant()->GetValue(); |
| if (static_cast<uint32_t>(value) - static_cast<uint32_t>(low) < |
| static_cast<uint32_t>(high - low + 1)) { |
| // No call, we shall use direct pointer to the Integer object. |
| call_kind = LocationSummary::kNoCall; |
| } |
| } |
| } else { |
| Runtime* runtime = Runtime::Current(); |
| if (runtime->GetHeap()->GetBootImageSpaces().empty()) { |
| return; // Running without boot image, cannot use required boot image objects. |
| } |
| Thread* self = Thread::Current(); |
| ScopedObjectAccess soa(self); |
| ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects = GetBootImageLiveObjects(); |
| ObjPtr<mirror::ObjectArray<mirror::Object>> cache = |
| IntrinsicObjects::GetIntegerValueOfCache(boot_image_live_objects); |
| if (cache == nullptr) { |
| return; // No cache in the boot image. |
| } |
| if (runtime->UseJitCompilation()) { |
| if (!CheckIntegerCache(self, runtime->GetClassLinker(), boot_image_live_objects, cache)) { |
| return; // The cache was somehow messed up, probably by using reflection. |
| } |
| } else { |
| DCHECK(runtime->IsAotCompiler()); |
| DCHECK(CheckIntegerCache(self, runtime->GetClassLinker(), boot_image_live_objects, cache)); |
| if (invoke->InputAt(0)->IsIntConstant()) { |
| int32_t value = invoke->InputAt(0)->AsIntConstant()->GetValue(); |
| // Retrieve the `value` from the lowest cached Integer. |
| ObjPtr<mirror::Object> low_integer = |
| IntrinsicObjects::GetIntegerValueOfObject(boot_image_live_objects, 0u); |
| ObjPtr<mirror::Class> integer_class = |
| low_integer->GetClass<kVerifyNone, kWithoutReadBarrier>(); |
| ArtField* value_field = integer_class->FindDeclaredInstanceField(kValueFieldName, "I"); |
| DCHECK(value_field != nullptr); |
| int32_t low = value_field->GetInt(low_integer); |
| if (static_cast<uint32_t>(value) - static_cast<uint32_t>(low) < |
| static_cast<uint32_t>(cache->GetLength())) { |
| // No call, we shall use direct pointer to the Integer object. Note that we cannot |
| // do this for JIT as the "low" can change through reflection before emitting the code. |
| call_kind = LocationSummary::kNoCall; |
| } |
| } |
| } |
| } |
| |
| ArenaAllocator* allocator = invoke->GetBlock()->GetGraph()->GetAllocator(); |
| LocationSummary* locations = new (allocator) LocationSummary(invoke, call_kind, kIntrinsified); |
| if (call_kind == LocationSummary::kCallOnMainOnly) { |
| locations->SetInAt(0, Location::RegisterOrConstant(invoke->InputAt(0))); |
| locations->AddTemp(first_argument_location); |
| locations->SetOut(return_location); |
| } else { |
| locations->SetInAt(0, Location::ConstantLocation(invoke->InputAt(0)->AsConstant())); |
| locations->SetOut(Location::RequiresRegister()); |
| } |
| } |
| |
| static int32_t GetIntegerCacheLowFromIntegerCache(Thread* self, ClassLinker* class_linker) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| ObjPtr<mirror::Class> cache_class = |
| LookupInitializedClass(self, class_linker, kIntegerCacheDescriptor); |
| return GetIntegerCacheField(cache_class, kLowFieldName); |
| } |
| |
| static uint32_t CalculateBootImageOffset(ObjPtr<mirror::Object> object) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| DCHECK(heap->ObjectIsInBootImageSpace(object)); |
| return reinterpret_cast<const uint8_t*>(object.Ptr()) - heap->GetBootImageSpaces()[0]->Begin(); |
| } |
| |
| inline IntrinsicVisitor::IntegerValueOfInfo::IntegerValueOfInfo() |
| : value_offset(0), |
| low(0), |
| length(0u), |
| integer_boot_image_offset(kInvalidReference), |
| value_boot_image_reference(kInvalidReference) {} |
| |
| IntrinsicVisitor::IntegerValueOfInfo IntrinsicVisitor::ComputeIntegerValueOfInfo( |
| HInvoke* invoke, const CompilerOptions& compiler_options) { |
| // Note that we could cache all of the data looked up here. but there's no good |
| // location for it. We don't want to add it to WellKnownClasses, to avoid creating global |
| // jni values. Adding it as state to the compiler singleton seems like wrong |
| // separation of concerns. |
| // The need for this data should be pretty rare though. |
| |
| // Note that at this point we can no longer abort the code generation. Therefore, |
| // we need to provide data that shall not lead to a crash even if the fields were |
| // modified through reflection since ComputeIntegerValueOfLocations() when JITting. |
| |
| Runtime* runtime = Runtime::Current(); |
| ClassLinker* class_linker = runtime->GetClassLinker(); |
| Thread* self = Thread::Current(); |
| ScopedObjectAccess soa(self); |
| |
| IntegerValueOfInfo info; |
| if (compiler_options.IsBootImage()) { |
| ObjPtr<mirror::Class> integer_class = |
| LookupInitializedClass(self, class_linker, kIntegerDescriptor); |
| ArtField* value_field = integer_class->FindDeclaredInstanceField(kValueFieldName, "I"); |
| DCHECK(value_field != nullptr); |
| info.value_offset = value_field->GetOffset().Uint32Value(); |
| ObjPtr<mirror::Class> cache_class = |
| LookupInitializedClass(self, class_linker, kIntegerCacheDescriptor); |
| info.low = GetIntegerCacheField(cache_class, kLowFieldName); |
| int32_t high = GetIntegerCacheField(cache_class, kHighFieldName); |
| info.length = dchecked_integral_cast<uint32_t>(high - info.low + 1); |
| |
| info.integer_boot_image_offset = IntegerValueOfInfo::kInvalidReference; |
| if (invoke->InputAt(0)->IsIntConstant()) { |
| int32_t input_value = invoke->InputAt(0)->AsIntConstant()->GetValue(); |
| uint32_t index = static_cast<uint32_t>(input_value) - static_cast<uint32_t>(info.low); |
| if (index < static_cast<uint32_t>(info.length)) { |
| info.value_boot_image_reference = IntrinsicObjects::EncodePatch( |
| IntrinsicObjects::PatchType::kIntegerValueOfObject, index); |
| } else { |
| // Not in the cache. |
| info.value_boot_image_reference = IntegerValueOfInfo::kInvalidReference; |
| } |
| } else { |
| info.array_data_boot_image_reference = |
| IntrinsicObjects::EncodePatch(IntrinsicObjects::PatchType::kIntegerValueOfArray); |
| } |
| } else { |
| ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects = GetBootImageLiveObjects(); |
| ObjPtr<mirror::Object> low_integer = |
| IntrinsicObjects::GetIntegerValueOfObject(boot_image_live_objects, 0u); |
| ObjPtr<mirror::Class> integer_class = low_integer->GetClass<kVerifyNone, kWithoutReadBarrier>(); |
| ArtField* value_field = integer_class->FindDeclaredInstanceField(kValueFieldName, "I"); |
| DCHECK(value_field != nullptr); |
| info.value_offset = value_field->GetOffset().Uint32Value(); |
| if (runtime->UseJitCompilation()) { |
| // Use the current `IntegerCache.low` for JIT to avoid truly surprising behavior if the |
| // code messes up the `value` field in the lowest cached Integer using reflection. |
| info.low = GetIntegerCacheLowFromIntegerCache(self, class_linker); |
| } else { |
| // For app AOT, the `low_integer->value` should be the same as `IntegerCache.low`. |
| info.low = value_field->GetInt(low_integer); |
| DCHECK_EQ(info.low, GetIntegerCacheLowFromIntegerCache(self, class_linker)); |
| } |
| // Do not look at `IntegerCache.high`, use the immutable length of the cache array instead. |
| info.length = dchecked_integral_cast<uint32_t>( |
| IntrinsicObjects::GetIntegerValueOfCache(boot_image_live_objects)->GetLength()); |
| |
| info.integer_boot_image_offset = CalculateBootImageOffset(integer_class); |
| if (invoke->InputAt(0)->IsIntConstant()) { |
| int32_t input_value = invoke->InputAt(0)->AsIntConstant()->GetValue(); |
| uint32_t index = static_cast<uint32_t>(input_value) - static_cast<uint32_t>(info.low); |
| if (index < static_cast<uint32_t>(info.length)) { |
| ObjPtr<mirror::Object> integer = |
| IntrinsicObjects::GetIntegerValueOfObject(boot_image_live_objects, index); |
| info.value_boot_image_reference = CalculateBootImageOffset(integer); |
| } else { |
| // Not in the cache. |
| info.value_boot_image_reference = IntegerValueOfInfo::kInvalidReference; |
| } |
| } else { |
| info.array_data_boot_image_reference = |
| CalculateBootImageOffset(boot_image_live_objects) + |
| IntrinsicObjects::GetIntegerValueOfArrayDataOffset(boot_image_live_objects).Uint32Value(); |
| } |
| } |
| |
| return info; |
| } |
| |
| } // namespace art |
