| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/dart_api_message.h" |
| #include "vm/object.h" |
| #include "vm/snapshot_ids.h" |
| #include "vm/symbols.h" |
| #include "vm/unicode.h" |
| |
| namespace dart { |
| |
| static const int kNumInitialReferences = 4; |
| |
| ApiMessageReader::ApiMessageReader(const uint8_t* buffer, |
| intptr_t length, |
| ReAlloc alloc) |
| : BaseReader(buffer, length), |
| alloc_(alloc), |
| backward_references_(kNumInitialReferences), |
| vm_symbol_references_(NULL) { |
| Init(); |
| } |
| |
| |
| void ApiMessageReader::Init() { |
| // Initialize marker objects used to handle Lists. |
| // TODO(sjesse): Remove this when message serialization format is |
| // updated. |
| memset(&type_arguments_marker, 0, sizeof(type_arguments_marker)); |
| memset(&dynamic_type_marker, 0, sizeof(dynamic_type_marker)); |
| type_arguments_marker.type = |
| static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kTypeArguments); |
| dynamic_type_marker.type = |
| static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kDynamicType); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadMessage() { |
| // Read the object out of the message. |
| return ReadObject(); |
| } |
| |
| |
| intptr_t ApiMessageReader::LookupInternalClass(intptr_t class_header) { |
| if (IsVMIsolateObject(class_header)) { |
| return GetVMIsolateObjectId(class_header); |
| } |
| ASSERT(SerializedHeaderTag::decode(class_header) == kObjectId); |
| return SerializedHeaderData::decode(class_header); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObject(Dart_CObject_Type type) { |
| Dart_CObject* value = |
| reinterpret_cast<Dart_CObject*>(alloc_(NULL, 0, sizeof(Dart_CObject))); |
| ASSERT(value != NULL); |
| value->type = type; |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectUnsupported() { |
| return AllocateDartCObject(Dart_CObject_kUnsupported); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectNull() { |
| return AllocateDartCObject(Dart_CObject_kNull); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectBool(bool val) { |
| Dart_CObject* value = AllocateDartCObject(Dart_CObject_kBool); |
| value->value.as_bool = val; |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectInt32(int32_t val) { |
| Dart_CObject* value = AllocateDartCObject(Dart_CObject_kInt32); |
| value->value.as_int32 = val; |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectInt64(int64_t val) { |
| Dart_CObject* value = AllocateDartCObject(Dart_CObject_kInt64); |
| value->value.as_int64 = val; |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectBigint(intptr_t length) { |
| // Allocate a Dart_CObject structure followed by an array of chars |
| // for the bigint hex string content. The pointer to the bigint |
| // content is set up to this area. |
| Dart_CObject* value = |
| reinterpret_cast<Dart_CObject*>( |
| alloc_(NULL, 0, sizeof(Dart_CObject) + length + 1)); |
| value->value.as_bigint = reinterpret_cast<char*>(value) + sizeof(*value); |
| value->type = Dart_CObject_kBigint; |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectDouble(double val) { |
| Dart_CObject* value = AllocateDartCObject(Dart_CObject_kDouble); |
| value->value.as_double = val; |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectString(intptr_t length) { |
| // Allocate a Dart_CObject structure followed by an array of chars |
| // for the string content. The pointer to the string content is set |
| // up to this area. |
| Dart_CObject* value = |
| reinterpret_cast<Dart_CObject*>( |
| alloc_(NULL, 0, sizeof(Dart_CObject) + length + 1)); |
| ASSERT(value != NULL); |
| value->value.as_string = reinterpret_cast<char*>(value) + sizeof(*value); |
| value->type = Dart_CObject_kString; |
| return value; |
| } |
| |
| |
| static int GetTypedDataSizeInBytes(Dart_TypedData_Type type) { |
| switch (type) { |
| case Dart_TypedData_kInt8: |
| case Dart_TypedData_kUint8: |
| case Dart_TypedData_kUint8Clamped: |
| return 1; |
| case Dart_TypedData_kInt16: |
| case Dart_TypedData_kUint16: |
| return 2; |
| case Dart_TypedData_kInt32: |
| case Dart_TypedData_kUint32: |
| case Dart_TypedData_kFloat32: |
| return 4; |
| case Dart_TypedData_kInt64: |
| case Dart_TypedData_kUint64: |
| case Dart_TypedData_kFloat64: |
| return 8; |
| default: |
| break; |
| } |
| UNREACHABLE(); |
| return -1; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectTypedData( |
| Dart_TypedData_Type type, intptr_t length) { |
| // Allocate a Dart_CObject structure followed by an array of bytes |
| // for the byte array content. The pointer to the byte array content |
| // is set up to this area. |
| intptr_t length_in_bytes = GetTypedDataSizeInBytes(type) * length; |
| Dart_CObject* value = |
| reinterpret_cast<Dart_CObject*>( |
| alloc_(NULL, 0, sizeof(Dart_CObject) + length_in_bytes)); |
| ASSERT(value != NULL); |
| value->type = Dart_CObject_kTypedData; |
| value->value.as_typed_data.type = type; |
| value->value.as_typed_data.length = length_in_bytes; |
| if (length > 0) { |
| value->value.as_typed_data.values = |
| reinterpret_cast<uint8_t*>(value) + sizeof(*value); |
| } else { |
| value->value.as_typed_data.values = NULL; |
| } |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::AllocateDartCObjectArray(intptr_t length) { |
| // Allocate a Dart_CObject structure followed by an array of |
| // pointers to Dart_CObject structures. The pointer to the array |
| // content is set up to this area. |
| Dart_CObject* value = |
| reinterpret_cast<Dart_CObject*>( |
| alloc_(NULL, 0, sizeof(Dart_CObject) + length * sizeof(value))); |
| ASSERT(value != NULL); |
| value->type = Dart_CObject_kArray; |
| value->value.as_array.length = length; |
| if (length > 0) { |
| value->value.as_array.values = reinterpret_cast<Dart_CObject**>(value + 1); |
| } else { |
| value->value.as_array.values = NULL; |
| } |
| return value; |
| } |
| |
| |
| Dart_CObject_Internal* ApiMessageReader::AllocateDartCObjectInternal( |
| Dart_CObject_Internal::Type type) { |
| Dart_CObject_Internal* value = |
| reinterpret_cast<Dart_CObject_Internal*>( |
| alloc_(NULL, 0, sizeof(Dart_CObject_Internal))); |
| ASSERT(value != NULL); |
| value->type = static_cast<Dart_CObject_Type>(type); |
| return value; |
| } |
| |
| |
| Dart_CObject_Internal* ApiMessageReader::AllocateDartCObjectClass() { |
| return AllocateDartCObjectInternal(Dart_CObject_Internal::kClass); |
| } |
| |
| |
| ApiMessageReader::BackRefNode* ApiMessageReader::AllocateBackRefNode( |
| Dart_CObject* reference, |
| DeserializeState state) { |
| BackRefNode* value = |
| reinterpret_cast<BackRefNode*>(alloc_(NULL, 0, sizeof(BackRefNode))); |
| value->set_reference(reference); |
| value->set_state(state); |
| return value; |
| } |
| |
| |
| static Dart_TypedData_Type GetTypedDataTypeFromView( |
| Dart_CObject_Internal* object) { |
| struct { |
| const char* name; |
| Dart_TypedData_Type type; |
| } view_class_names[] = { |
| { "_Int8ArrayView", Dart_TypedData_kInt8 }, |
| { "_Uint8ArrayView", Dart_TypedData_kUint8 }, |
| { "_Uint8ClampedArrayView", Dart_TypedData_kUint8Clamped }, |
| { "_Int16ArrayView", Dart_TypedData_kInt16 }, |
| { "_Uint16ArrayView", Dart_TypedData_kUint16 }, |
| { "_Int32ArrayView", Dart_TypedData_kInt32 }, |
| { "_Uint32ArrayView", Dart_TypedData_kUint32 }, |
| { "_Int64ArrayView", Dart_TypedData_kInt64 }, |
| { "_Uint64ArrayView", Dart_TypedData_kUint64 }, |
| { "_ByteDataView", Dart_TypedData_kUint8 }, |
| { "_Float32ArrayView", Dart_TypedData_kFloat32 }, |
| { "_Float64ArrayView", Dart_TypedData_kFloat64 }, |
| { NULL, Dart_TypedData_kInvalid }, |
| }; |
| |
| char* library_url = |
| object->cls->internal.as_class.library_url->value.as_string; |
| char* class_name = |
| object->cls->internal.as_class.class_name->value.as_string; |
| if (strcmp("dart:typed_data", library_url) != 0) { |
| return Dart_TypedData_kInvalid; |
| } |
| int i = 0; |
| while (view_class_names[i].name != NULL) { |
| if (strncmp(view_class_names[i].name, |
| class_name, |
| strlen(view_class_names[i].name)) == 0) { |
| return view_class_names[i].type; |
| } |
| i++; |
| } |
| return Dart_TypedData_kInvalid; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadInlinedObject(intptr_t object_id) { |
| // Read the class header information and lookup the class. |
| intptr_t class_header = ReadIntptrValue(); |
| intptr_t tags = ReadIntptrValue(); |
| USE(tags); |
| intptr_t class_id; |
| |
| // There is limited support for reading regular dart instances. Only |
| // typed data views are currently handled. |
| if (SerializedHeaderData::decode(class_header) == kInstanceObjectId) { |
| Dart_CObject_Internal* object = |
| reinterpret_cast<Dart_CObject_Internal*>(GetBackRef(object_id)); |
| if (object == NULL) { |
| object = |
| AllocateDartCObjectInternal(Dart_CObject_Internal::kUninitialized); |
| AddBackRef(object_id, object, kIsDeserialized); |
| // Read class of object. |
| object->cls = reinterpret_cast<Dart_CObject_Internal*>(ReadObjectImpl()); |
| ASSERT(object->cls->type == |
| static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kClass)); |
| } |
| ASSERT(object->type == |
| static_cast<Dart_CObject_Type>( |
| Dart_CObject_Internal::kUninitialized)); |
| |
| // Handle typed data views. |
| Dart_TypedData_Type type = GetTypedDataTypeFromView(object); |
| if (type != Dart_TypedData_kInvalid) { |
| object->type = |
| static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kView); |
| ReadObjectImpl(); // Skip type arguments. |
| object->internal.as_view.buffer = ReadObjectImpl(); |
| object->internal.as_view.offset_in_bytes = ReadSmiValue(); |
| object->internal.as_view.length = ReadSmiValue(); |
| ReadObjectImpl(); // Skip last field. |
| |
| // The buffer is fully read now as typed data objects are |
| // serialized in-line. |
| Dart_CObject* buffer = object->internal.as_view.buffer; |
| ASSERT(buffer->type == Dart_CObject_kTypedData); |
| |
| // Now turn the view into a byte array. |
| object->type = Dart_CObject_kTypedData; |
| object->value.as_typed_data.type = type; |
| object->value.as_typed_data.length = |
| object->internal.as_view.length * |
| GetTypedDataSizeInBytes(type); |
| object->value.as_typed_data.values = |
| buffer->value.as_typed_data.values + |
| object->internal.as_view.offset_in_bytes; |
| } else { |
| // TODO(sgjesse): Handle other instances. Currently this will |
| // skew the reading as the fields of the instance is not read. |
| } |
| return object; |
| } |
| |
| ASSERT((class_header & kSmiTagMask) != 0); |
| class_id = LookupInternalClass(class_header); |
| if ((class_id == kArrayCid) || (class_id == kImmutableArrayCid)) { |
| intptr_t len = ReadSmiValue(); |
| Dart_CObject* value = GetBackRef(object_id); |
| if (value == NULL) { |
| value = AllocateDartCObjectArray(len); |
| AddBackRef(object_id, value, kIsDeserialized); |
| } |
| // Skip type arguments. |
| // TODO(sjesse): Remove this when message serialization format is |
| // updated (currently type_arguments is leaked). |
| Dart_CObject* type_arguments = ReadObjectImpl(); |
| if (type_arguments != &type_arguments_marker && |
| type_arguments->type != Dart_CObject_kNull) { |
| return AllocateDartCObjectUnsupported(); |
| } |
| for (int i = 0; i < len; i++) { |
| value->value.as_array.values[i] = ReadObjectRef(); |
| } |
| return value; |
| } |
| |
| return ReadInternalVMObject(class_id, object_id); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadVMSymbol(intptr_t object_id) { |
| ASSERT(Symbols::IsVMSymbolId(object_id)); |
| intptr_t symbol_id = object_id - kMaxPredefinedObjectIds; |
| Dart_CObject* object; |
| if (vm_symbol_references_ != NULL && |
| (object = vm_symbol_references_[symbol_id]) != NULL) { |
| return object; |
| } |
| |
| if (vm_symbol_references_ == NULL) { |
| intptr_t size = |
| (sizeof(*vm_symbol_references_) * Symbols::kMaxPredefinedId); |
| vm_symbol_references_ = |
| reinterpret_cast<Dart_CObject**>(alloc_(NULL, 0, size)); |
| memset(vm_symbol_references_, 0, size); |
| } |
| |
| RawOneByteString* str = |
| reinterpret_cast<RawOneByteString*>(Symbols::GetVMSymbol(object_id)); |
| intptr_t len = Smi::Value(str->ptr()->length_); |
| object = AllocateDartCObjectString(len); |
| char* p = object->value.as_string; |
| memmove(p, str->ptr()->data_, len); |
| p[len] = '\0'; |
| ASSERT(vm_symbol_references_[symbol_id] == NULL); |
| vm_symbol_references_[symbol_id] = object; |
| return object; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadObjectRef() { |
| int64_t value = Read<int64_t>(); |
| if ((value & kSmiTagMask) == 0) { |
| int64_t untagged_value = value >> kSmiTagShift; |
| if (kMinInt32 <= untagged_value && untagged_value <= kMaxInt32) { |
| return AllocateDartCObjectInt32(untagged_value); |
| } else { |
| return AllocateDartCObjectInt64(untagged_value); |
| } |
| } |
| ASSERT((value <= kIntptrMax) && (value >= kIntptrMin)); |
| if (IsVMIsolateObject(value)) { |
| return ReadVMIsolateObject(value); |
| } |
| if (SerializedHeaderTag::decode(value) == kObjectId) { |
| return ReadIndexedObject(SerializedHeaderData::decode(value)); |
| } |
| ASSERT(SerializedHeaderTag::decode(value) == kInlined); |
| // Read the class header information and lookup the class. |
| intptr_t class_header = ReadIntptrValue(); |
| |
| // Reading of regular dart instances has limited support in order to |
| // read typed data views. |
| if (SerializedHeaderData::decode(class_header) == kInstanceObjectId) { |
| intptr_t object_id = SerializedHeaderData::decode(value); |
| Dart_CObject_Internal* object = |
| AllocateDartCObjectInternal(Dart_CObject_Internal::kUninitialized); |
| AddBackRef(object_id, object, kIsNotDeserialized); |
| // Read class of object. |
| object->cls = reinterpret_cast<Dart_CObject_Internal*>(ReadObjectImpl()); |
| ASSERT(object->cls->type == |
| static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kClass)); |
| return object; |
| } |
| ASSERT((class_header & kSmiTagMask) != 0); |
| intptr_t object_id = SerializedHeaderData::decode(value); |
| intptr_t class_id = LookupInternalClass(class_header); |
| if ((class_id == kArrayCid) || (class_id == kImmutableArrayCid)) { |
| ASSERT(GetBackRef(object_id) == NULL); |
| intptr_t len = ReadSmiValue(); |
| Dart_CObject* value = AllocateDartCObjectArray(len); |
| AddBackRef(object_id, value, kIsNotDeserialized); |
| return value; |
| } |
| |
| intptr_t tags = ReadIntptrValue(); |
| USE(tags); |
| |
| return ReadInternalVMObject(class_id, object_id); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadVMIsolateObject(intptr_t value) { |
| intptr_t object_id = GetVMIsolateObjectId(value); |
| if (object_id == kNullObject) { |
| return AllocateDartCObjectNull(); |
| } |
| if (object_id == kTrueValue) { |
| return AllocateDartCObjectBool(true); |
| } |
| if (object_id == kFalseValue) { |
| return AllocateDartCObjectBool(false); |
| } |
| if (Symbols::IsVMSymbolId(object_id)) { |
| return ReadVMSymbol(object_id); |
| } |
| // No other VM isolate objects are supported. |
| return AllocateDartCObjectNull(); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadInternalVMObject(intptr_t class_id, |
| intptr_t object_id) { |
| switch (class_id) { |
| case kClassCid: { |
| Dart_CObject_Internal* object = AllocateDartCObjectClass(); |
| AddBackRef(object_id, object, kIsDeserialized); |
| object->internal.as_class.library_url = ReadObjectImpl(); |
| ASSERT(object->internal.as_class.library_url->type == |
| Dart_CObject_kString); |
| object->internal.as_class.class_name = ReadObjectImpl(); |
| ASSERT(object->internal.as_class.class_name->type == |
| Dart_CObject_kString); |
| return object; |
| } |
| case kTypeArgumentsCid: { |
| // TODO(sjesse): Remove this when message serialization format is |
| // updated (currently length is leaked). |
| Dart_CObject* value = &type_arguments_marker; |
| AddBackRef(object_id, value, kIsDeserialized); |
| Dart_CObject* length = ReadObjectImpl(); |
| ASSERT(length->type == Dart_CObject_kInt32); |
| for (int i = 0; i < length->value.as_int32; i++) { |
| Dart_CObject* type = ReadObjectImpl(); |
| if (type != &dynamic_type_marker) { |
| return AllocateDartCObjectUnsupported(); |
| } |
| } |
| return value; |
| } |
| case kTypeParameterCid: { |
| // TODO(sgjesse): Fix this workaround ignoring the type parameter. |
| Dart_CObject* value = &dynamic_type_marker; |
| AddBackRef(object_id, value, kIsDeserialized); |
| intptr_t index = ReadIntptrValue(); |
| USE(index); |
| intptr_t token_index = ReadIntptrValue(); |
| USE(token_index); |
| int8_t type_state = Read<int8_t>(); |
| USE(type_state); |
| Dart_CObject* parameterized_class = ReadObjectImpl(); |
| // The type parameter is finalized, therefore parameterized_class is null. |
| ASSERT(parameterized_class->type == Dart_CObject_kNull); |
| Dart_CObject* name = ReadObjectImpl(); |
| ASSERT(name->type == Dart_CObject_kString); |
| return value; |
| } |
| case kMintCid: { |
| int64_t value = Read<int64_t>(); |
| Dart_CObject* object; |
| if (kMinInt32 <= value && value <= kMaxInt32) { |
| object = AllocateDartCObjectInt32(value); |
| } else { |
| object = AllocateDartCObjectInt64(value); |
| } |
| AddBackRef(object_id, object, kIsDeserialized); |
| return object; |
| } |
| case kBigintCid: { |
| // Read in the hex string representation of the bigint. |
| intptr_t len = ReadIntptrValue(); |
| Dart_CObject* object = AllocateDartCObjectBigint(len); |
| AddBackRef(object_id, object, kIsDeserialized); |
| char* p = object->value.as_bigint; |
| for (intptr_t i = 0; i < len; i++) { |
| p[i] = Read<uint8_t>(); |
| } |
| p[len] = '\0'; |
| return object; |
| } |
| case kDoubleCid: { |
| // Read the double value for the object. |
| Dart_CObject* object = AllocateDartCObjectDouble(Read<double>()); |
| AddBackRef(object_id, object, kIsDeserialized); |
| return object; |
| } |
| case kOneByteStringCid: { |
| intptr_t len = ReadSmiValue(); |
| intptr_t hash = ReadSmiValue(); |
| USE(hash); |
| uint8_t *latin1 = |
| reinterpret_cast<uint8_t*>(::malloc(len * sizeof(uint8_t))); |
| intptr_t utf8_len = 0; |
| for (intptr_t i = 0; i < len; i++) { |
| latin1[i] = Read<uint8_t>(); |
| utf8_len += Utf8::Length(latin1[i]); |
| } |
| Dart_CObject* object = AllocateDartCObjectString(utf8_len); |
| AddBackRef(object_id, object, kIsDeserialized); |
| char* p = object->value.as_string; |
| for (intptr_t i = 0; i < len; i++) { |
| p += Utf8::Encode(latin1[i], p); |
| } |
| *p = '\0'; |
| ASSERT(p == (object->value.as_string + utf8_len)); |
| ::free(latin1); |
| return object; |
| } |
| case kTwoByteStringCid: { |
| intptr_t len = ReadSmiValue(); |
| intptr_t hash = ReadSmiValue(); |
| USE(hash); |
| uint16_t *utf16 = |
| reinterpret_cast<uint16_t*>(::malloc(len * sizeof(uint16_t))); |
| intptr_t utf8_len = 0; |
| // Read all the UTF-16 code units. |
| for (intptr_t i = 0; i < len; i++) { |
| utf16[i] = Read<uint16_t>(); |
| } |
| // Calculate the UTF-8 length and check if the string can be |
| // UTF-8 encoded. |
| bool valid = true; |
| intptr_t i = 0; |
| while (i < len && valid) { |
| int32_t ch = Utf16::Next(utf16, &i, len); |
| utf8_len += Utf8::Length(ch); |
| valid = !Utf16::IsSurrogate(ch); |
| } |
| if (!valid) { |
| return AllocateDartCObjectUnsupported(); |
| } |
| Dart_CObject* object = AllocateDartCObjectString(utf8_len); |
| AddBackRef(object_id, object, kIsDeserialized); |
| char* p = object->value.as_string; |
| i = 0; |
| while (i < len) { |
| p += Utf8::Encode(Utf16::Next(utf16, &i, len), p); |
| } |
| *p = '\0'; |
| ASSERT(p == (object->value.as_string + utf8_len)); |
| ::free(utf16); |
| return object; |
| } |
| |
| #define READ_TYPED_DATA(type, ctype) \ |
| { \ |
| intptr_t len = ReadSmiValue(); \ |
| Dart_CObject* object = \ |
| AllocateDartCObjectTypedData(Dart_TypedData_k##type, len); \ |
| AddBackRef(object_id, object, kIsDeserialized); \ |
| if (len > 0) { \ |
| ctype* p = \ |
| reinterpret_cast<ctype*>(object->value.as_typed_data.values); \ |
| for (intptr_t i = 0; i < len; i++) { \ |
| p[i] = Read<ctype>(); \ |
| } \ |
| } \ |
| return object; \ |
| } \ |
| |
| case kTypedDataInt8ArrayCid: |
| case kExternalTypedDataInt8ArrayCid: |
| READ_TYPED_DATA(Int8, int8_t); |
| |
| case kTypedDataUint8ArrayCid: |
| case kExternalTypedDataUint8ArrayCid: |
| READ_TYPED_DATA(Uint8, uint8_t); |
| |
| case kTypedDataUint8ClampedArrayCid: |
| case kExternalTypedDataUint8ClampedArrayCid: |
| READ_TYPED_DATA(Uint8Clamped, uint8_t); |
| |
| case kTypedDataInt16ArrayCid: |
| case kExternalTypedDataInt16ArrayCid: |
| READ_TYPED_DATA(Int16, int16_t); |
| |
| case kTypedDataUint16ArrayCid: |
| case kExternalTypedDataUint16ArrayCid: |
| READ_TYPED_DATA(Uint16, uint16_t); |
| |
| case kTypedDataInt32ArrayCid: |
| case kExternalTypedDataInt32ArrayCid: |
| READ_TYPED_DATA(Int32, int32_t); |
| |
| case kTypedDataUint32ArrayCid: |
| case kExternalTypedDataUint32ArrayCid: |
| READ_TYPED_DATA(Uint32, uint32_t); |
| |
| case kTypedDataInt64ArrayCid: |
| case kExternalTypedDataInt64ArrayCid: |
| READ_TYPED_DATA(Int64, int64_t); |
| |
| case kTypedDataUint64ArrayCid: |
| case kExternalTypedDataUint64ArrayCid: |
| READ_TYPED_DATA(Uint64, uint64_t); |
| |
| case kTypedDataFloat32ArrayCid: |
| case kExternalTypedDataFloat32ArrayCid: |
| READ_TYPED_DATA(Float32, float); |
| |
| case kTypedDataFloat64ArrayCid: |
| case kExternalTypedDataFloat64ArrayCid: |
| READ_TYPED_DATA(Float64, double); |
| |
| case kGrowableObjectArrayCid: { |
| // A GrowableObjectArray is serialized as its length followed by |
| // its backing store. The backing store is an array with a |
| // length which might be longer than the length of the |
| // GrowableObjectArray. |
| intptr_t len = ReadSmiValue(); |
| |
| Dart_CObject* value = GetBackRef(object_id); |
| ASSERT(value == NULL); |
| // Allocate an empty array for the GrowableObjectArray which |
| // will be updated to point to the content when the backing |
| // store has been deserialized. |
| value = AllocateDartCObjectArray(0); |
| AddBackRef(object_id, value, kIsDeserialized); |
| // Read the content of the GrowableObjectArray. |
| Dart_CObject* content = ReadObjectImpl(); |
| ASSERT(content->type == Dart_CObject_kArray); |
| // Make the empty array allocated point to the backing store content. |
| value->value.as_array.length = len; |
| value->value.as_array.values = content->value.as_array.values; |
| return value; |
| } |
| default: |
| // Everything else not supported. |
| Dart_CObject* value = AllocateDartCObjectUnsupported(); |
| AddBackRef(object_id, value, kIsDeserialized); |
| return value; |
| } |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadIndexedObject(intptr_t object_id) { |
| if (object_id == kDynamicType || |
| object_id == kDoubleType || |
| object_id == kIntType || |
| object_id == kBoolType || |
| object_id == kStringType) { |
| // Always return dynamic type (this is only a marker). |
| return &dynamic_type_marker; |
| } |
| intptr_t index = object_id - kMaxPredefinedObjectIds; |
| ASSERT((0 <= index) && (index < backward_references_.length())); |
| ASSERT(backward_references_[index]->reference() != NULL); |
| return backward_references_[index]->reference(); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadObject() { |
| Dart_CObject* value = ReadObjectImpl(); |
| for (intptr_t i = 0; i < backward_references_.length(); i++) { |
| if (!backward_references_[i]->is_deserialized()) { |
| ReadObjectImpl(); |
| backward_references_[i]->set_state(kIsDeserialized); |
| } |
| } |
| return value; |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::ReadObjectImpl() { |
| int64_t value = Read<int64_t>(); |
| if ((value & kSmiTagMask) == 0) { |
| int64_t untagged_value = value >> kSmiTagShift; |
| if (kMinInt32 <= untagged_value && untagged_value <= kMaxInt32) { |
| return AllocateDartCObjectInt32(untagged_value); |
| } else { |
| return AllocateDartCObjectInt64(untagged_value); |
| } |
| } |
| ASSERT((value <= kIntptrMax) && (value >= kIntptrMin)); |
| if (IsVMIsolateObject(value)) { |
| return ReadVMIsolateObject(value); |
| } |
| if (SerializedHeaderTag::decode(value) == kObjectId) { |
| return ReadIndexedObject(SerializedHeaderData::decode(value)); |
| } |
| ASSERT(SerializedHeaderTag::decode(value) == kInlined); |
| return ReadInlinedObject(SerializedHeaderData::decode(value)); |
| } |
| |
| |
| void ApiMessageReader::AddBackRef(intptr_t id, |
| Dart_CObject* obj, |
| DeserializeState state) { |
| intptr_t index = (id - kMaxPredefinedObjectIds); |
| ASSERT(index == backward_references_.length()); |
| BackRefNode* node = AllocateBackRefNode(obj, state); |
| ASSERT(node != NULL); |
| backward_references_.Add(node); |
| } |
| |
| |
| Dart_CObject* ApiMessageReader::GetBackRef(intptr_t id) { |
| ASSERT(id >= kMaxPredefinedObjectIds); |
| intptr_t index = (id - kMaxPredefinedObjectIds); |
| if (index < backward_references_.length()) { |
| return backward_references_[index]->reference(); |
| } |
| return NULL; |
| } |
| |
| |
| void ApiMessageWriter::WriteMessage(intptr_t field_count, intptr_t *data) { |
| // Write out the serialization header value for this object. |
| WriteInlinedObjectHeader(kMaxPredefinedObjectIds); |
| |
| // Write out the class and tags information. |
| WriteIndexedObject(kArrayCid); |
| WriteIntptrValue(0); |
| |
| // Write out the length field. |
| Write<RawObject*>(Smi::New(field_count)); |
| |
| // Write out the type arguments. |
| WriteNullObject(); |
| |
| // Write out the individual Smis. |
| for (int i = 0; i < field_count; i++) { |
| Write<RawObject*>(Integer::New(data[i])); |
| } |
| } |
| |
| |
| void ApiMessageWriter::MarkCObject(Dart_CObject* object, intptr_t object_id) { |
| // Mark the object as serialized by adding the object id to the |
| // upper bits of the type field in the Dart_CObject structure. Add |
| // an offset for making marking of object id 0 possible. |
| ASSERT(!IsCObjectMarked(object)); |
| intptr_t mark_value = object_id + kDartCObjectMarkOffset; |
| object->type = static_cast<Dart_CObject_Type>( |
| ((mark_value) << kDartCObjectTypeBits) | object->type); |
| } |
| |
| |
| void ApiMessageWriter::UnmarkCObject(Dart_CObject* object) { |
| ASSERT(IsCObjectMarked(object)); |
| object->type = static_cast<Dart_CObject_Type>( |
| object->type & kDartCObjectTypeMask); |
| } |
| |
| |
| bool ApiMessageWriter::IsCObjectMarked(Dart_CObject* object) { |
| return (object->type & kDartCObjectMarkMask) != 0; |
| } |
| |
| |
| intptr_t ApiMessageWriter::GetMarkedCObjectMark(Dart_CObject* object) { |
| ASSERT(IsCObjectMarked(object)); |
| intptr_t mark_value = |
| ((object->type & kDartCObjectMarkMask) >> kDartCObjectTypeBits); |
| // An offset was added to object id for making marking object id 0 possible. |
| return mark_value - kDartCObjectMarkOffset; |
| } |
| |
| |
| void ApiMessageWriter::UnmarkAllCObjects(Dart_CObject* object) { |
| if (!IsCObjectMarked(object)) return; |
| UnmarkCObject(object); |
| if (object->type == Dart_CObject_kArray) { |
| for (int i = 0; i < object->value.as_array.length; i++) { |
| Dart_CObject* element = object->value.as_array.values[i]; |
| UnmarkAllCObjects(element); |
| } |
| } |
| } |
| |
| |
| void ApiMessageWriter::AddToForwardList(Dart_CObject* object) { |
| if (forward_id_ >= forward_list_length_) { |
| void* new_list = NULL; |
| if (forward_list_length_ == 0) { |
| forward_list_length_ = 4; |
| intptr_t new_size = forward_list_length_ * sizeof(object); |
| new_list = ::malloc(new_size); |
| } else { |
| forward_list_length_ *= 2; |
| intptr_t new_size = (forward_list_length_ * sizeof(object)); |
| new_list = ::realloc(forward_list_, new_size); |
| } |
| ASSERT(new_list != NULL); |
| forward_list_ = reinterpret_cast<Dart_CObject**>(new_list); |
| } |
| forward_list_[forward_id_] = object; |
| forward_id_ += 1; |
| } |
| |
| |
| void ApiMessageWriter::WriteSmi(int64_t value) { |
| ASSERT(Smi::IsValid64(value)); |
| Write<RawObject*>(Smi::New(value)); |
| } |
| |
| |
| void ApiMessageWriter::WriteNullObject() { |
| WriteVMIsolateObject(kNullObject); |
| } |
| |
| |
| void ApiMessageWriter::WriteMint(Dart_CObject* object, int64_t value) { |
| ASSERT(!Smi::IsValid64(value)); |
| // Write out the serialization header value for mint object. |
| WriteInlinedHeader(object); |
| // Write out the class and tags information. |
| WriteIndexedObject(kMintCid); |
| WriteIntptrValue(0); |
| // Write the 64-bit value. |
| Write<int64_t>(value); |
| } |
| |
| |
| void ApiMessageWriter::WriteInt32(Dart_CObject* object) { |
| int64_t value = object->value.as_int32; |
| if (Smi::IsValid64(value)) { |
| WriteSmi(value); |
| } else { |
| WriteMint(object, value); |
| } |
| } |
| |
| |
| void ApiMessageWriter::WriteInt64(Dart_CObject* object) { |
| int64_t value = object->value.as_int64; |
| if (Smi::IsValid64(value)) { |
| WriteSmi(value); |
| } else { |
| WriteMint(object, value); |
| } |
| } |
| |
| |
| void ApiMessageWriter::WriteInlinedHeader(Dart_CObject* object) { |
| // Write out the serialization header value for this object. |
| WriteInlinedObjectHeader(kMaxPredefinedObjectIds + object_id_); |
| // Mark object with its object id. |
| MarkCObject(object, object_id_); |
| // Advance object id. |
| object_id_++; |
| } |
| |
| |
| bool ApiMessageWriter::WriteCObject(Dart_CObject* object) { |
| if (IsCObjectMarked(object)) { |
| intptr_t object_id = GetMarkedCObjectMark(object); |
| WriteIndexedObject(kMaxPredefinedObjectIds + object_id); |
| return true; |
| } |
| |
| Dart_CObject_Type type = object->type; |
| if (type == Dart_CObject_kArray) { |
| // Write out the serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class and tags information. |
| WriteIndexedObject(kArrayCid); |
| WriteIntptrValue(0); |
| |
| WriteSmi(object->value.as_array.length); |
| // Write out the type arguments. |
| WriteNullObject(); |
| // Write out array elements. |
| for (int i = 0; i < object->value.as_array.length; i++) { |
| bool success = WriteCObjectRef(object->value.as_array.values[i]); |
| if (!success) return false; |
| } |
| return true; |
| } |
| return WriteCObjectInlined(object, type); |
| } |
| |
| |
| bool ApiMessageWriter::WriteCObjectRef(Dart_CObject* object) { |
| if (IsCObjectMarked(object)) { |
| intptr_t object_id = GetMarkedCObjectMark(object); |
| WriteIndexedObject(kMaxPredefinedObjectIds + object_id); |
| return true; |
| } |
| |
| Dart_CObject_Type type = object->type; |
| if (type == Dart_CObject_kArray) { |
| // Write out the serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class information. |
| WriteIndexedObject(kArrayCid); |
| // Write out the length information. |
| WriteSmi(object->value.as_array.length); |
| // Add object to forward list so that this object is serialized later. |
| AddToForwardList(object); |
| return true; |
| } |
| return WriteCObjectInlined(object, type); |
| } |
| |
| |
| bool ApiMessageWriter::WriteForwardedCObject(Dart_CObject* object) { |
| ASSERT(IsCObjectMarked(object)); |
| Dart_CObject_Type type = |
| static_cast<Dart_CObject_Type>(object->type & kDartCObjectTypeMask); |
| ASSERT(type == Dart_CObject_kArray); |
| |
| // Write out the serialization header value for this object. |
| intptr_t object_id = GetMarkedCObjectMark(object); |
| WriteInlinedObjectHeader(kMaxPredefinedObjectIds + object_id); |
| // Write out the class and tags information. |
| WriteIndexedObject(kArrayCid); |
| WriteIntptrValue(0); |
| |
| WriteSmi(object->value.as_array.length); |
| // Write out the type arguments. |
| WriteNullObject(); |
| // Write out array elements. |
| for (int i = 0; i < object->value.as_array.length; i++) { |
| bool success = WriteCObjectRef(object->value.as_array.values[i]); |
| if (!success) return false; |
| } |
| return true; |
| } |
| |
| |
| bool ApiMessageWriter::WriteCObjectInlined(Dart_CObject* object, |
| Dart_CObject_Type type) { |
| switch (type) { |
| case Dart_CObject_kNull: |
| WriteNullObject(); |
| break; |
| case Dart_CObject_kBool: |
| if (object->value.as_bool) { |
| WriteVMIsolateObject(kTrueValue); |
| } else { |
| WriteVMIsolateObject(kFalseValue); |
| } |
| break; |
| case Dart_CObject_kInt32: |
| WriteInt32(object); |
| break; |
| case Dart_CObject_kInt64: |
| WriteInt64(object); |
| break; |
| case Dart_CObject_kBigint: { |
| // Write out the serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class and tags information. |
| WriteIndexedObject(kBigintCid); |
| WriteIntptrValue(0); |
| // Write hex string length and content |
| char* hex_string = object->value.as_bigint; |
| intptr_t len = strlen(hex_string); |
| WriteIntptrValue(len); |
| for (intptr_t i = 0; i < len; i++) { |
| Write<uint8_t>(hex_string[i]); |
| } |
| break; |
| } |
| case Dart_CObject_kDouble: |
| // Write out the serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class and tags information. |
| WriteIndexedObject(kDoubleCid); |
| WriteIntptrValue(0); |
| // Write double value. |
| Write<double>(object->value.as_double); |
| break; |
| case Dart_CObject_kString: { |
| const uint8_t* utf8_str = |
| reinterpret_cast<const uint8_t*>(object->value.as_string); |
| intptr_t utf8_len = strlen(object->value.as_string); |
| if (!Utf8::IsValid(utf8_str, utf8_len)) { |
| return false; |
| } |
| |
| Utf8::Type type; |
| intptr_t len = Utf8::CodeUnitCount(utf8_str, utf8_len, &type); |
| |
| // Write out the serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class and tags information. |
| WriteIndexedObject(type == Utf8::kLatin1 ? kOneByteStringCid |
| : kTwoByteStringCid); |
| WriteIntptrValue(0); |
| // Write string length, hash and content |
| WriteSmi(len); |
| WriteSmi(0); // TODO(sgjesse): Hash - not written. |
| if (type == Utf8::kLatin1) { |
| uint8_t* latin1_str = |
| reinterpret_cast<uint8_t*>(::malloc(len * sizeof(uint8_t))); |
| bool success = Utf8::DecodeToLatin1(utf8_str, |
| utf8_len, |
| latin1_str, |
| len); |
| ASSERT(success); |
| for (intptr_t i = 0; i < len; i++) { |
| Write<uint8_t>(latin1_str[i]); |
| } |
| ::free(latin1_str); |
| } else { |
| uint16_t* utf16_str = |
| reinterpret_cast<uint16_t*>(::malloc(len * sizeof(uint16_t))); |
| bool success = Utf8::DecodeToUTF16(utf8_str, utf8_len, utf16_str, len); |
| ASSERT(success); |
| for (intptr_t i = 0; i < len; i++) { |
| Write<uint16_t>(utf16_str[i]); |
| } |
| ::free(utf16_str); |
| } |
| break; |
| } |
| case Dart_CObject_kTypedData: { |
| // Write out the serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class and tags information. |
| intptr_t class_id; |
| switch (object->value.as_typed_data.type) { |
| case Dart_TypedData_kInt8: |
| class_id = kTypedDataInt8ArrayCid; |
| break; |
| case Dart_TypedData_kUint8: |
| class_id = kTypedDataUint8ArrayCid; |
| break; |
| default: |
| class_id = kTypedDataUint8ArrayCid; |
| UNIMPLEMENTED(); |
| } |
| |
| WriteIndexedObject(class_id); |
| WriteIntptrValue(RawObject::ClassIdTag::update(class_id, 0)); |
| uint8_t* bytes = object->value.as_typed_data.values; |
| intptr_t len = object->value.as_typed_data.length; |
| WriteSmi(len); |
| for (intptr_t i = 0; i < len; i++) { |
| Write<uint8_t>(bytes[i]); |
| } |
| break; |
| } |
| case Dart_CObject_kExternalTypedData: { |
| // TODO(ager): we are writing C pointers into the message in |
| // order to post external arrays through ports. We need to make |
| // sure that messages containing pointers can never be posted |
| // to other processes. |
| |
| // Write out serialization header value for this object. |
| WriteInlinedHeader(object); |
| // Write out the class and tag information. |
| WriteIndexedObject(kExternalTypedDataUint8ArrayCid); |
| WriteIntptrValue(RawObject::ClassIdTag::update( |
| kExternalTypedDataUint8ArrayCid, 0)); |
| int length = object->value.as_external_typed_data.length; |
| uint8_t* data = object->value.as_external_typed_data.data; |
| void* peer = object->value.as_external_typed_data.peer; |
| Dart_WeakPersistentHandleFinalizer callback = |
| object->value.as_external_typed_data.callback; |
| WriteSmi(length); |
| WriteIntptrValue(reinterpret_cast<intptr_t>(data)); |
| WriteIntptrValue(reinterpret_cast<intptr_t>(peer)); |
| WriteIntptrValue(reinterpret_cast<intptr_t>(callback)); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| |
| return true; |
| } |
| |
| |
| bool ApiMessageWriter::WriteCMessage(Dart_CObject* object) { |
| bool success = WriteCObject(object); |
| if (!success) { |
| UnmarkAllCObjects(object); |
| return false; |
| } |
| // Write out all objects that were added to the forward list and have |
| // not been serialized yet. These would typically be fields of arrays. |
| // NOTE: The forward list might grow as we process the list. |
| for (intptr_t i = 0; i < forward_id_; i++) { |
| success = WriteForwardedCObject(forward_list_[i]); |
| if (!success) { |
| UnmarkAllCObjects(object); |
| return false; |
| } |
| } |
| UnmarkAllCObjects(object); |
| return true; |
| } |
| |
| } // namespace dart |
