| /* |
| * Copyright (C) 2014 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 "transaction.h" |
| |
| #include <android-base/logging.h> |
| |
| #include "base/mutex-inl.h" |
| #include "base/stl_util.h" |
| #include "dex/descriptors_names.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "gc/heap.h" |
| #include "gc_root-inl.h" |
| #include "intern_table.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/dex_cache-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "oat/aot_class_linker.h" |
| #include "obj_ptr-inl.h" |
| #include "runtime.h" |
| |
| #include <list> |
| |
| namespace art HIDDEN { |
| |
| // TODO: remove (only used for debugging purpose). |
| static constexpr bool kEnableTransactionStats = false; |
| |
| Transaction::Transaction(bool strict, |
| mirror::Class* root, |
| ArenaStack* arena_stack, |
| ArenaPool* arena_pool) |
| : arena_stack_(std::nullopt), |
| allocator_(arena_stack != nullptr ? arena_stack : &arena_stack_.emplace(arena_pool)), |
| object_logs_(std::less<mirror::Object*>(), allocator_.Adapter(kArenaAllocTransaction)), |
| array_logs_(std::less<mirror::Array*>(), allocator_.Adapter(kArenaAllocTransaction)), |
| intern_string_logs_(allocator_.Adapter(kArenaAllocTransaction)), |
| resolve_string_logs_(allocator_.Adapter(kArenaAllocTransaction)), |
| resolve_method_type_logs_(allocator_.Adapter(kArenaAllocTransaction)), |
| aborted_(false), |
| rolling_back_(false), |
| heap_(Runtime::Current()->GetHeap()), |
| strict_(strict), |
| root_(root), |
| assert_no_new_records_reason_(nullptr) { |
| DCHECK(Runtime::Current()->IsAotCompiler()); |
| DCHECK_NE(arena_stack != nullptr, arena_pool != nullptr); |
| } |
| |
| Transaction::~Transaction() { |
| if (kEnableTransactionStats) { |
| size_t objects_count = object_logs_.size(); |
| size_t field_values_count = 0; |
| for (const auto& it : object_logs_) { |
| field_values_count += it.second.Size(); |
| } |
| size_t array_count = array_logs_.size(); |
| size_t array_values_count = 0; |
| for (const auto& it : array_logs_) { |
| array_values_count += it.second.Size(); |
| } |
| size_t intern_string_count = |
| std::distance(intern_string_logs_.begin(), intern_string_logs_.end()); |
| size_t resolve_string_count = |
| std::distance(resolve_string_logs_.begin(), resolve_string_logs_.end()); |
| size_t resolve_method_type_count = |
| std::distance(resolve_method_type_logs_.begin(), resolve_method_type_logs_.end()); |
| LOG(INFO) << "Transaction::~Transaction" |
| << ": objects_count=" << objects_count |
| << ", field_values_count=" << field_values_count |
| << ", array_count=" << array_count |
| << ", array_values_count=" << array_values_count |
| << ", intern_string_count=" << intern_string_count |
| << ", resolve_string_count=" << resolve_string_count |
| << ", resolve_method_type_count=" << resolve_method_type_count; |
| } |
| } |
| |
| void Transaction::Abort(const std::string& abort_message) { |
| // We may abort more than once if the exception thrown at the time of the |
| // previous abort has been caught during execution of a class initializer. |
| // We just keep the message of the first abort because it will cause the |
| // transaction to be rolled back anyway. |
| if (!aborted_) { |
| aborted_ = true; |
| abort_message_ = abort_message; |
| } |
| } |
| |
| void Transaction::ThrowAbortError(Thread* self, const std::string* abort_message) { |
| const bool rethrow = (abort_message == nullptr); |
| if (kIsDebugBuild && rethrow) { |
| CHECK(IsAborted()) << "Rethrow " << DescriptorToDot(Transaction::kAbortExceptionDescriptor) |
| << " while transaction is not aborted"; |
| } |
| if (rethrow) { |
| // Rethrow an exception with the earlier abort message stored in the transaction. |
| self->ThrowNewWrappedException(Transaction::kAbortExceptionDescriptor, |
| GetAbortMessage().c_str()); |
| } else { |
| // Throw an exception with the given abort message. |
| self->ThrowNewWrappedException(Transaction::kAbortExceptionDescriptor, |
| abort_message->c_str()); |
| } |
| } |
| |
| const std::string& Transaction::GetAbortMessage() const { |
| return abort_message_; |
| } |
| |
| bool Transaction::WriteConstraint(ObjPtr<mirror::Object> obj) const { |
| DCHECK(obj != nullptr); |
| |
| // Prevent changes in boot image spaces for app or boot image extension. |
| // For boot image there are no boot image spaces and this condition evaluates to false. |
| if (heap_->ObjectIsInBootImageSpace(obj)) { |
| return true; |
| } |
| |
| // For apps, also prevent writing to other classes. |
| return IsStrict() && |
| obj->IsClass() && // no constraint updating instances or arrays |
| obj != root_; // modifying other classes' static field, fail |
| } |
| |
| bool Transaction::WriteValueConstraint(ObjPtr<mirror::Object> value) const { |
| if (value == nullptr) { |
| return false; // We can always store null values. |
| } |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| if (IsStrict()) { |
| // TODO: Should we restrict writes the same way as for boot image extension? |
| return false; |
| } else if (heap->GetBootImageSpaces().empty()) { |
| return false; // No constraints for boot image. |
| } else { |
| // Boot image extension. |
| ObjPtr<mirror::Class> klass = value->IsClass() ? value->AsClass() : value->GetClass(); |
| return !AotClassLinker::CanReferenceInBootImageExtension(klass, heap); |
| } |
| } |
| |
| bool Transaction::ReadConstraint(ObjPtr<mirror::Object> obj) const { |
| // Read constraints are checked only for static field reads as there are |
| // no constraints on reading instance fields and array elements. |
| DCHECK(obj->IsClass()); |
| if (IsStrict()) { |
| return obj != root_; // fail if not self-updating |
| } else { |
| // For boot image and boot image extension, allow reading any field. |
| return false; |
| } |
| } |
| |
| inline Transaction::ObjectLog& Transaction::GetOrCreateObjectLog(mirror::Object* obj) { |
| return object_logs_.GetOrCreate(obj, [&]() { return ObjectLog(&allocator_); }); |
| } |
| |
| void Transaction::RecordWriteFieldBoolean(mirror::Object* obj, |
| MemberOffset field_offset, |
| uint8_t value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.LogBooleanValue(field_offset, value, is_volatile); |
| } |
| |
| void Transaction::RecordWriteFieldByte(mirror::Object* obj, |
| MemberOffset field_offset, |
| int8_t value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.LogByteValue(field_offset, value, is_volatile); |
| } |
| |
| void Transaction::RecordWriteFieldChar(mirror::Object* obj, |
| MemberOffset field_offset, |
| uint16_t value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.LogCharValue(field_offset, value, is_volatile); |
| } |
| |
| |
| void Transaction::RecordWriteFieldShort(mirror::Object* obj, |
| MemberOffset field_offset, |
| int16_t value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.LogShortValue(field_offset, value, is_volatile); |
| } |
| |
| |
| void Transaction::RecordWriteField32(mirror::Object* obj, |
| MemberOffset field_offset, |
| uint32_t value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.Log32BitsValue(field_offset, value, is_volatile); |
| } |
| |
| void Transaction::RecordWriteField64(mirror::Object* obj, |
| MemberOffset field_offset, |
| uint64_t value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.Log64BitsValue(field_offset, value, is_volatile); |
| } |
| |
| void Transaction::RecordWriteFieldReference(mirror::Object* obj, |
| MemberOffset field_offset, |
| mirror::Object* value, |
| bool is_volatile) { |
| DCHECK(obj != nullptr); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ObjectLog& object_log = GetOrCreateObjectLog(obj); |
| object_log.LogReferenceValue(field_offset, value, is_volatile); |
| } |
| |
| void Transaction::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) { |
| DCHECK(array != nullptr); |
| DCHECK(array->IsArrayInstance()); |
| DCHECK(!array->IsObjectArray()); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| ArrayLog& array_log = array_logs_.GetOrCreate(array, [&]() { return ArrayLog(&allocator_); }); |
| array_log.LogValue(index, value); |
| } |
| |
| void Transaction::RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, |
| dex::StringIndex string_idx) { |
| DCHECK(dex_cache != nullptr); |
| DCHECK_LT(string_idx.index_, dex_cache->GetDexFile()->NumStringIds()); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| resolve_string_logs_.emplace_front(dex_cache, string_idx); |
| } |
| |
| void Transaction::RecordResolveMethodType(ObjPtr<mirror::DexCache> dex_cache, |
| dex::ProtoIndex proto_idx) { |
| DCHECK(dex_cache != nullptr); |
| DCHECK_LT(proto_idx.index_, dex_cache->GetDexFile()->NumProtoIds()); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| resolve_method_type_logs_.emplace_front(dex_cache, proto_idx); |
| } |
| |
| void Transaction::RecordStrongStringInsertion(ObjPtr<mirror::String> s) { |
| InternStringLog log(s, InternStringLog::kStrongString, InternStringLog::kInsert); |
| LogInternedString(std::move(log)); |
| } |
| |
| void Transaction::RecordWeakStringInsertion(ObjPtr<mirror::String> s) { |
| InternStringLog log(s, InternStringLog::kWeakString, InternStringLog::kInsert); |
| LogInternedString(std::move(log)); |
| } |
| |
| void Transaction::RecordStrongStringRemoval(ObjPtr<mirror::String> s) { |
| InternStringLog log(s, InternStringLog::kStrongString, InternStringLog::kRemove); |
| LogInternedString(std::move(log)); |
| } |
| |
| void Transaction::RecordWeakStringRemoval(ObjPtr<mirror::String> s) { |
| InternStringLog log(s, InternStringLog::kWeakString, InternStringLog::kRemove); |
| LogInternedString(std::move(log)); |
| } |
| |
| void Transaction::LogInternedString(InternStringLog&& log) { |
| Locks::intern_table_lock_->AssertExclusiveHeld(Thread::Current()); |
| DCHECK(assert_no_new_records_reason_ == nullptr) << assert_no_new_records_reason_; |
| intern_string_logs_.push_front(std::move(log)); |
| } |
| |
| void Transaction::Rollback() { |
| Thread* self = Thread::Current(); |
| self->AssertNoPendingException(); |
| MutexLock mu(self, *Locks::intern_table_lock_); |
| rolling_back_ = true; |
| CHECK(!Runtime::Current()->IsActiveTransaction()); |
| UndoObjectModifications(); |
| UndoArrayModifications(); |
| UndoInternStringTableModifications(); |
| UndoResolveStringModifications(); |
| UndoResolveMethodTypeModifications(); |
| rolling_back_ = false; |
| } |
| |
| void Transaction::UndoObjectModifications() { |
| // TODO we may not need to restore objects allocated during this transaction. Or we could directly |
| // remove them from the heap. |
| for (const auto& it : object_logs_) { |
| it.second.Undo(it.first); |
| } |
| object_logs_.clear(); |
| } |
| |
| void Transaction::UndoArrayModifications() { |
| // TODO we may not need to restore array allocated during this transaction. Or we could directly |
| // remove them from the heap. |
| for (const auto& it : array_logs_) { |
| it.second.Undo(it.first); |
| } |
| array_logs_.clear(); |
| } |
| |
| void Transaction::UndoInternStringTableModifications() { |
| InternTable* const intern_table = Runtime::Current()->GetInternTable(); |
| // We want to undo each operation from the most recent to the oldest. List has been filled so the |
| // most recent operation is at list begin so just have to iterate over it. |
| for (const InternStringLog& string_log : intern_string_logs_) { |
| string_log.Undo(intern_table); |
| } |
| intern_string_logs_.clear(); |
| } |
| |
| void Transaction::UndoResolveStringModifications() { |
| for (ResolveStringLog& string_log : resolve_string_logs_) { |
| string_log.Undo(); |
| } |
| resolve_string_logs_.clear(); |
| } |
| |
| void Transaction::UndoResolveMethodTypeModifications() { |
| for (ResolveMethodTypeLog& method_type_log : resolve_method_type_logs_) { |
| method_type_log.Undo(); |
| } |
| resolve_method_type_logs_.clear(); |
| } |
| |
| void Transaction::VisitRoots(RootVisitor* visitor) { |
| // Transactions are used for single-threaded initialization. |
| // This is the only function that should be called from a different thread, |
| // namely the GC thread, and it is called with the mutator lock held exclusively, |
| // so the data structures in the `Transaction` are protected from concurrent use. |
| DCHECK(Locks::mutator_lock_->IsExclusiveHeld(Thread::Current())); |
| |
| visitor->VisitRoot(reinterpret_cast<mirror::Object**>(&root_), RootInfo(kRootUnknown)); |
| { |
| // Create a separate `ArenaStack` for this thread. |
| ArenaStack arena_stack(Runtime::Current()->GetArenaPool()); |
| VisitObjectLogs(visitor, &arena_stack); |
| VisitArrayLogs(visitor, &arena_stack); |
| } |
| VisitInternStringLogs(visitor); |
| VisitResolveStringLogs(visitor); |
| VisitResolveMethodTypeLogs(visitor); |
| } |
| |
| template <typename MovingRoots, typename Container> |
| void UpdateKeys(const MovingRoots& moving_roots, Container& container) { |
| for (const auto& pair : moving_roots) { |
| auto* old_root = pair.first; |
| auto* new_root = pair.second; |
| auto node = container.extract(old_root); |
| CHECK(!node.empty()); |
| node.key() = new_root; |
| bool inserted = container.insert(std::move(node)).inserted; |
| CHECK(inserted); |
| } |
| } |
| |
| void Transaction::VisitObjectLogs(RootVisitor* visitor, ArenaStack* arena_stack) { |
| // List of moving roots. |
| ScopedArenaAllocator allocator(arena_stack); |
| using ObjectPair = std::pair<mirror::Object*, mirror::Object*>; |
| ScopedArenaForwardList<ObjectPair> moving_roots(allocator.Adapter(kArenaAllocTransaction)); |
| |
| // Visit roots. |
| for (auto& it : object_logs_) { |
| it.second.VisitRoots(visitor); |
| mirror::Object* old_root = it.first; |
| mirror::Object* new_root = old_root; |
| visitor->VisitRoot(&new_root, RootInfo(kRootUnknown)); |
| if (new_root != old_root) { |
| moving_roots.push_front(std::make_pair(old_root, new_root)); |
| } |
| } |
| |
| // Update object logs with moving roots. |
| UpdateKeys(moving_roots, object_logs_); |
| } |
| |
| void Transaction::VisitArrayLogs(RootVisitor* visitor, ArenaStack* arena_stack) { |
| // List of moving roots. |
| ScopedArenaAllocator allocator(arena_stack); |
| using ArrayPair = std::pair<mirror::Array*, mirror::Array*>; |
| ScopedArenaForwardList<ArrayPair> moving_roots(allocator.Adapter(kArenaAllocTransaction)); |
| |
| for (auto& it : array_logs_) { |
| mirror::Array* old_root = it.first; |
| mirror::Array* new_root = old_root; |
| visitor->VisitRoot(reinterpret_cast<mirror::Object**>(&new_root), RootInfo(kRootUnknown)); |
| if (new_root != old_root) { |
| moving_roots.push_front(std::make_pair(old_root, new_root)); |
| } |
| } |
| |
| // Update array logs with moving roots. |
| UpdateKeys(moving_roots, array_logs_); |
| } |
| |
| void Transaction::VisitInternStringLogs(RootVisitor* visitor) { |
| for (InternStringLog& log : intern_string_logs_) { |
| log.VisitRoots(visitor); |
| } |
| } |
| |
| void Transaction::VisitResolveStringLogs(RootVisitor* visitor) { |
| for (ResolveStringLog& log : resolve_string_logs_) { |
| log.VisitRoots(visitor); |
| } |
| } |
| |
| void Transaction::VisitResolveMethodTypeLogs(RootVisitor* visitor) { |
| for (ResolveMethodTypeLog& log : resolve_method_type_logs_) { |
| log.VisitRoots(visitor); |
| } |
| } |
| |
| void Transaction::ObjectLog::LogBooleanValue(MemberOffset offset, uint8_t value, bool is_volatile) { |
| LogValue(ObjectLog::kBoolean, offset, value, is_volatile); |
| } |
| |
| void Transaction::ObjectLog::LogByteValue(MemberOffset offset, int8_t value, bool is_volatile) { |
| LogValue(ObjectLog::kByte, offset, value, is_volatile); |
| } |
| |
| void Transaction::ObjectLog::LogCharValue(MemberOffset offset, uint16_t value, bool is_volatile) { |
| LogValue(ObjectLog::kChar, offset, value, is_volatile); |
| } |
| |
| void Transaction::ObjectLog::LogShortValue(MemberOffset offset, int16_t value, bool is_volatile) { |
| LogValue(ObjectLog::kShort, offset, value, is_volatile); |
| } |
| |
| void Transaction::ObjectLog::Log32BitsValue(MemberOffset offset, uint32_t value, bool is_volatile) { |
| LogValue(ObjectLog::k32Bits, offset, value, is_volatile); |
| } |
| |
| void Transaction::ObjectLog::Log64BitsValue(MemberOffset offset, uint64_t value, bool is_volatile) { |
| LogValue(ObjectLog::k64Bits, offset, value, is_volatile); |
| } |
| |
| void Transaction::ObjectLog::LogReferenceValue(MemberOffset offset, |
| mirror::Object* obj, |
| bool is_volatile) { |
| LogValue(ObjectLog::kReference, offset, reinterpret_cast<uintptr_t>(obj), is_volatile); |
| } |
| |
| void Transaction::ObjectLog::LogValue(ObjectLog::FieldValueKind kind, |
| MemberOffset offset, |
| uint64_t value, |
| bool is_volatile) { |
| auto it = field_values_.find(offset.Uint32Value()); |
| if (it == field_values_.end()) { |
| ObjectLog::FieldValue field_value; |
| field_value.value = value; |
| field_value.is_volatile = is_volatile; |
| field_value.kind = kind; |
| field_values_.emplace(offset.Uint32Value(), std::move(field_value)); |
| } |
| } |
| |
| void Transaction::ObjectLog::Undo(mirror::Object* obj) const { |
| for (auto& it : field_values_) { |
| // Garbage collector needs to access object's class and array's length. So we don't rollback |
| // these values. |
| MemberOffset field_offset(it.first); |
| if (field_offset.Uint32Value() == mirror::Class::ClassOffset().Uint32Value()) { |
| // Skip Object::class field. |
| continue; |
| } |
| if (obj->IsArrayInstance() && |
| field_offset.Uint32Value() == mirror::Array::LengthOffset().Uint32Value()) { |
| // Skip Array::length field. |
| continue; |
| } |
| const FieldValue& field_value = it.second; |
| UndoFieldWrite(obj, field_offset, field_value); |
| } |
| } |
| |
| void Transaction::ObjectLog::UndoFieldWrite(mirror::Object* obj, |
| MemberOffset field_offset, |
| const FieldValue& field_value) const { |
| // TODO We may want to abort a transaction while still being in transaction mode. In this case, |
| // we'd need to disable the check. |
| constexpr bool kCheckTransaction = false; |
| switch (field_value.kind) { |
| case kBoolean: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetFieldBooleanVolatile<false, kCheckTransaction>( |
| field_offset, |
| field_value.value); |
| } else { |
| obj->SetFieldBoolean<false, kCheckTransaction>( |
| field_offset, |
| field_value.value); |
| } |
| break; |
| case kByte: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetFieldByteVolatile<false, kCheckTransaction>( |
| field_offset, |
| static_cast<int8_t>(field_value.value)); |
| } else { |
| obj->SetFieldByte<false, kCheckTransaction>( |
| field_offset, |
| static_cast<int8_t>(field_value.value)); |
| } |
| break; |
| case kChar: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetFieldCharVolatile<false, kCheckTransaction>( |
| field_offset, |
| static_cast<uint16_t>(field_value.value)); |
| } else { |
| obj->SetFieldChar<false, kCheckTransaction>( |
| field_offset, |
| static_cast<uint16_t>(field_value.value)); |
| } |
| break; |
| case kShort: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetFieldShortVolatile<false, kCheckTransaction>( |
| field_offset, |
| static_cast<int16_t>(field_value.value)); |
| } else { |
| obj->SetFieldShort<false, kCheckTransaction>( |
| field_offset, |
| static_cast<int16_t>(field_value.value)); |
| } |
| break; |
| case k32Bits: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetField32Volatile<false, kCheckTransaction>( |
| field_offset, |
| static_cast<uint32_t>(field_value.value)); |
| } else { |
| obj->SetField32<false, kCheckTransaction>( |
| field_offset, |
| static_cast<uint32_t>(field_value.value)); |
| } |
| break; |
| case k64Bits: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetField64Volatile<false, kCheckTransaction>(field_offset, field_value.value); |
| } else { |
| obj->SetField64<false, kCheckTransaction>(field_offset, field_value.value); |
| } |
| break; |
| case kReference: |
| if (UNLIKELY(field_value.is_volatile)) { |
| obj->SetFieldObjectVolatile<false, kCheckTransaction>( |
| field_offset, |
| reinterpret_cast<mirror::Object*>(field_value.value)); |
| } else { |
| obj->SetFieldObject<false, kCheckTransaction>( |
| field_offset, |
| reinterpret_cast<mirror::Object*>(field_value.value)); |
| } |
| break; |
| default: |
| LOG(FATAL) << "Unknown value kind " << static_cast<int>(field_value.kind); |
| UNREACHABLE(); |
| } |
| } |
| |
| void Transaction::ObjectLog::VisitRoots(RootVisitor* visitor) { |
| for (auto& it : field_values_) { |
| FieldValue& field_value = it.second; |
| if (field_value.kind == ObjectLog::kReference) { |
| visitor->VisitRootIfNonNull(reinterpret_cast<mirror::Object**>(&field_value.value), |
| RootInfo(kRootUnknown)); |
| } |
| } |
| } |
| |
| void Transaction::InternStringLog::Undo(InternTable* intern_table) const { |
| DCHECK(!Runtime::Current()->IsActiveTransaction()); |
| DCHECK(intern_table != nullptr); |
| ObjPtr<mirror::String> s = str_.Read(); |
| uint32_t hash = static_cast<uint32_t>(s->GetStoredHashCode()); |
| switch (string_op_) { |
| case InternStringLog::kInsert: { |
| switch (string_kind_) { |
| case InternStringLog::kStrongString: |
| intern_table->RemoveStrong(s, hash); |
| break; |
| case InternStringLog::kWeakString: |
| intern_table->RemoveWeak(s, hash); |
| break; |
| default: |
| LOG(FATAL) << "Unknown interned string kind"; |
| UNREACHABLE(); |
| } |
| break; |
| } |
| case InternStringLog::kRemove: { |
| switch (string_kind_) { |
| case InternStringLog::kStrongString: |
| intern_table->InsertStrong(s, hash); |
| break; |
| case InternStringLog::kWeakString: |
| intern_table->InsertWeak(s, hash); |
| break; |
| default: |
| LOG(FATAL) << "Unknown interned string kind"; |
| UNREACHABLE(); |
| } |
| break; |
| } |
| default: |
| LOG(FATAL) << "Unknown interned string op"; |
| UNREACHABLE(); |
| } |
| } |
| |
| void Transaction::InternStringLog::VisitRoots(RootVisitor* visitor) { |
| str_.VisitRoot(visitor, RootInfo(kRootInternedString)); |
| } |
| |
| void Transaction::ResolveStringLog::Undo() const { |
| dex_cache_.Read()->ClearString(string_idx_); |
| } |
| |
| Transaction::ResolveStringLog::ResolveStringLog(ObjPtr<mirror::DexCache> dex_cache, |
| dex::StringIndex string_idx) |
| : dex_cache_(dex_cache), |
| string_idx_(string_idx) { |
| DCHECK(dex_cache != nullptr); |
| DCHECK_LT(string_idx_.index_, dex_cache->GetDexFile()->NumStringIds()); |
| } |
| |
| void Transaction::ResolveStringLog::VisitRoots(RootVisitor* visitor) { |
| dex_cache_.VisitRoot(visitor, RootInfo(kRootVMInternal)); |
| } |
| |
| void Transaction::ResolveMethodTypeLog::Undo() const { |
| dex_cache_.Read()->ClearMethodType(proto_idx_); |
| } |
| |
| Transaction::ResolveMethodTypeLog::ResolveMethodTypeLog(ObjPtr<mirror::DexCache> dex_cache, |
| dex::ProtoIndex proto_idx) |
| : dex_cache_(dex_cache), |
| proto_idx_(proto_idx) { |
| DCHECK(dex_cache != nullptr); |
| DCHECK_LT(proto_idx_.index_, dex_cache->GetDexFile()->NumProtoIds()); |
| } |
| |
| void Transaction::ResolveMethodTypeLog::VisitRoots(RootVisitor* visitor) { |
| dex_cache_.VisitRoot(visitor, RootInfo(kRootVMInternal)); |
| } |
| |
| Transaction::InternStringLog::InternStringLog(ObjPtr<mirror::String> s, |
| StringKind kind, |
| StringOp op) |
| : str_(s), |
| string_kind_(kind), |
| string_op_(op) { |
| DCHECK(s != nullptr); |
| } |
| |
| void Transaction::ArrayLog::LogValue(size_t index, uint64_t value) { |
| // Add a mapping if there is none yet. |
| array_values_.FindOrAdd(index, value); |
| } |
| |
| void Transaction::ArrayLog::Undo(mirror::Array* array) const { |
| DCHECK(array != nullptr); |
| DCHECK(array->IsArrayInstance()); |
| Primitive::Type type = array->GetClass()->GetComponentType()->GetPrimitiveType(); |
| for (auto it : array_values_) { |
| UndoArrayWrite(array, type, it.first, it.second); |
| } |
| } |
| |
| void Transaction::ArrayLog::UndoArrayWrite(mirror::Array* array, |
| Primitive::Type array_type, |
| size_t index, |
| uint64_t value) const { |
| // TODO We may want to abort a transaction while still being in transaction mode. In this case, |
| // we'd need to disable the check. |
| constexpr bool kCheckTransaction = false; |
| switch (array_type) { |
| case Primitive::kPrimBoolean: |
| array->AsBooleanArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<uint8_t>(value)); |
| break; |
| case Primitive::kPrimByte: |
| array->AsByteArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<int8_t>(value)); |
| break; |
| case Primitive::kPrimChar: |
| array->AsCharArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<uint16_t>(value)); |
| break; |
| case Primitive::kPrimShort: |
| array->AsShortArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<int16_t>(value)); |
| break; |
| case Primitive::kPrimInt: |
| array->AsIntArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<int32_t>(value)); |
| break; |
| case Primitive::kPrimFloat: |
| array->AsFloatArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<float>(value)); |
| break; |
| case Primitive::kPrimLong: |
| array->AsLongArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<int64_t>(value)); |
| break; |
| case Primitive::kPrimDouble: |
| array->AsDoubleArray()->SetWithoutChecks<false, kCheckTransaction>( |
| index, static_cast<double>(value)); |
| break; |
| case Primitive::kPrimNot: |
| LOG(FATAL) << "ObjectArray should be treated as Object"; |
| UNREACHABLE(); |
| default: |
| LOG(FATAL) << "Unsupported type " << array_type; |
| UNREACHABLE(); |
| } |
| } |
| |
| Transaction* ScopedAssertNoNewTransactionRecords::InstallAssertion(const char* reason) { |
| Transaction* transaction = nullptr; |
| if (kIsDebugBuild && Runtime::Current()->IsActiveTransaction()) { |
| transaction = Runtime::Current()->GetTransaction(); |
| if (transaction != nullptr) { |
| CHECK(transaction->assert_no_new_records_reason_ == nullptr) |
| << "old: " << transaction->assert_no_new_records_reason_ << " new: " << reason; |
| transaction->assert_no_new_records_reason_ = reason; |
| } |
| } |
| return transaction; |
| } |
| |
| void ScopedAssertNoNewTransactionRecords::RemoveAssertion(Transaction* transaction) { |
| if (kIsDebugBuild) { |
| CHECK(Runtime::Current()->GetTransaction() == transaction); |
| CHECK(transaction->assert_no_new_records_reason_ != nullptr); |
| transaction->assert_no_new_records_reason_ = nullptr; |
| } |
| } |
| |
| } // namespace art |