mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
36985859e4
Bug: https://github.com/dart-lang/sdk/issues/37833 Change-Id: Iac906e58320e003365c4c0624b4587579f352db1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/114970 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
1183 lines
43 KiB
C++
1183 lines
43 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include <memory>
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#include "vm/dart_api_message.h"
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#include "platform/unicode.h"
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#include "vm/object.h"
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#include "vm/snapshot_ids.h"
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#include "vm/symbols.h"
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namespace dart {
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static const int kNumInitialReferences = 4;
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ApiMessageReader::ApiMessageReader(Message* msg)
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: BaseReader(msg->IsRaw() ? reinterpret_cast<uint8_t*>(msg->raw_obj())
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: msg->snapshot(),
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msg->snapshot_length()),
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zone_(NULL),
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backward_references_(kNumInitialReferences),
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vm_isolate_references_(kNumInitialReferences),
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vm_symbol_references_(NULL),
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finalizable_data_(msg->finalizable_data()) {}
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ApiMessageReader::~ApiMessageReader() {}
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void ApiMessageReader::Init() {
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// We need to have an enclosing ApiNativeScope.
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ASSERT(ApiNativeScope::Current() != NULL);
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zone_ = ApiNativeScope::Current()->zone();
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ASSERT(zone_ != NULL);
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// Initialize marker objects used to handle Lists.
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// TODO(sjesse): Remove this when message serialization format is
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// updated.
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memset(&type_arguments_marker, 0, sizeof(type_arguments_marker));
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memset(&dynamic_type_marker, 0, sizeof(dynamic_type_marker));
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type_arguments_marker.type =
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static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kTypeArguments);
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dynamic_type_marker.type =
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static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kDynamicType);
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}
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Dart_CObject* ApiMessageReader::ReadMessage() {
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Init();
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if (PendingBytes() > 0) {
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// Read the object out of the message.
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return ReadObject();
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} else {
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const RawObject* raw_obj =
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reinterpret_cast<const RawObject*>(CurrentBufferAddress());
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ASSERT(ApiObjectConverter::CanConvert(raw_obj));
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Dart_CObject* cobj =
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reinterpret_cast<Dart_CObject*>(allocator(sizeof(Dart_CObject)));
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ApiObjectConverter::Convert(raw_obj, cobj);
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return cobj;
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}
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}
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intptr_t ApiMessageReader::LookupInternalClass(intptr_t class_header) {
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if (IsVMIsolateObject(class_header)) {
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return GetVMIsolateObjectId(class_header);
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}
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ASSERT(SerializedHeaderTag::decode(class_header) == kObjectId);
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return SerializedHeaderData::decode(class_header);
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObject(Dart_CObject_Type type) {
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Dart_CObject* value =
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reinterpret_cast<Dart_CObject*>(allocator(sizeof(Dart_CObject)));
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ASSERT(value != NULL);
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value->type = type;
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return value;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectUnsupported() {
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return AllocateDartCObject(Dart_CObject_kUnsupported);
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectNull() {
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return AllocateDartCObject(Dart_CObject_kNull);
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectBool(bool val) {
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Dart_CObject* value = AllocateDartCObject(Dart_CObject_kBool);
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value->value.as_bool = val;
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return value;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectInt32(int32_t val) {
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Dart_CObject* value = AllocateDartCObject(Dart_CObject_kInt32);
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value->value.as_int32 = val;
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return value;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectInt64(int64_t val) {
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Dart_CObject* value = AllocateDartCObject(Dart_CObject_kInt64);
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value->value.as_int64 = val;
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return value;
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}
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_Dart_CObject* ApiMessageReader::singleton_uint32_typed_data_ = NULL;
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Dart_CObject* ApiMessageReader::AllocateDartCObjectDouble(double val) {
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Dart_CObject* value = AllocateDartCObject(Dart_CObject_kDouble);
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value->value.as_double = val;
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return value;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectString(intptr_t length) {
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// Allocate a Dart_CObject structure followed by an array of chars
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// for the string content. The pointer to the string content is set
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// up to this area.
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Dart_CObject* value = reinterpret_cast<Dart_CObject*>(
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allocator(sizeof(Dart_CObject) + length + 1));
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ASSERT(value != NULL);
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value->value.as_string = reinterpret_cast<char*>(value) + sizeof(*value);
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value->type = Dart_CObject_kString;
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return value;
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}
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static int GetTypedDataSizeInBytes(Dart_TypedData_Type type) {
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switch (type) {
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case Dart_TypedData_kInt8:
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case Dart_TypedData_kUint8:
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case Dart_TypedData_kUint8Clamped:
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return 1;
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case Dart_TypedData_kInt16:
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case Dart_TypedData_kUint16:
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return 2;
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case Dart_TypedData_kInt32:
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case Dart_TypedData_kUint32:
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case Dart_TypedData_kFloat32:
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return 4;
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case Dart_TypedData_kInt64:
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case Dart_TypedData_kUint64:
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case Dart_TypedData_kFloat64:
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return 8;
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default:
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break;
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}
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UNREACHABLE();
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return -1;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectTypedData(
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Dart_TypedData_Type type,
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intptr_t length) {
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// Allocate a Dart_CObject structure followed by an array of bytes
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// for the byte array content. The pointer to the byte array content
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// is set up to this area.
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intptr_t length_in_bytes = GetTypedDataSizeInBytes(type) * length;
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Dart_CObject* value = reinterpret_cast<Dart_CObject*>(
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allocator(sizeof(Dart_CObject) + length_in_bytes));
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ASSERT(value != NULL);
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value->type = Dart_CObject_kTypedData;
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value->value.as_typed_data.type = type;
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value->value.as_typed_data.length = length_in_bytes;
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if (length > 0) {
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value->value.as_typed_data.values =
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reinterpret_cast<uint8_t*>(value) + sizeof(*value);
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} else {
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value->value.as_typed_data.values = NULL;
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}
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return value;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectArray(intptr_t length) {
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// Allocate a Dart_CObject structure followed by an array of
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// pointers to Dart_CObject structures. The pointer to the array
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// content is set up to this area.
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Dart_CObject* value = reinterpret_cast<Dart_CObject*>(
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allocator(sizeof(Dart_CObject) + length * sizeof(value)));
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ASSERT(value != NULL);
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value->type = Dart_CObject_kArray;
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value->value.as_array.length = length;
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if (length > 0) {
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value->value.as_array.values = reinterpret_cast<Dart_CObject**>(value + 1);
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} else {
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value->value.as_array.values = NULL;
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}
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return value;
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}
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Dart_CObject* ApiMessageReader::AllocateDartCObjectVmIsolateObj(intptr_t id) {
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RawObject* raw = VmIsolateSnapshotObject(id);
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intptr_t cid = raw->GetClassId();
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switch (cid) {
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case kOneByteStringCid: {
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RawOneByteString* raw_str = reinterpret_cast<RawOneByteString*>(raw);
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const char* str = reinterpret_cast<const char*>(raw_str->ptr()->data());
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ASSERT(str != NULL);
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Dart_CObject* object = NULL;
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for (intptr_t i = 0; i < vm_isolate_references_.length(); i++) {
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object = vm_isolate_references_.At(i);
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if (object->type == Dart_CObject_kString) {
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if (strcmp(str, object->value.as_string) == 0) {
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return object;
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}
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}
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}
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object = CreateDartCObjectString(raw);
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vm_isolate_references_.Add(object);
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return object;
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}
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case kMintCid: {
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const Mint& obj = Mint::Handle(reinterpret_cast<RawMint*>(raw));
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int64_t value64 = obj.value();
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if ((kMinInt32 <= value64) && (value64 <= kMaxInt32)) {
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return GetCanonicalMintObject(Dart_CObject_kInt32, value64);
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} else {
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return GetCanonicalMintObject(Dart_CObject_kInt64, value64);
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}
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}
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default:
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UNREACHABLE();
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return NULL;
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}
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}
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Dart_CObject_Internal* ApiMessageReader::AllocateDartCObjectInternal(
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Dart_CObject_Internal::Type type) {
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Dart_CObject_Internal* value = reinterpret_cast<Dart_CObject_Internal*>(
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allocator(sizeof(Dart_CObject_Internal)));
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ASSERT(value != NULL);
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value->type = static_cast<Dart_CObject_Type>(type);
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return value;
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}
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Dart_CObject_Internal* ApiMessageReader::AllocateDartCObjectClass() {
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return AllocateDartCObjectInternal(Dart_CObject_Internal::kClass);
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}
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ApiMessageReader::BackRefNode* ApiMessageReader::AllocateBackRefNode(
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Dart_CObject* reference,
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DeserializeState state) {
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BackRefNode* value =
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reinterpret_cast<BackRefNode*>(allocator(sizeof(BackRefNode)));
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value->set_reference(reference);
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value->set_state(state);
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return value;
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}
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Dart_CObject* ApiMessageReader::ReadInlinedObject(intptr_t object_id) {
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// Read the class header information and lookup the class.
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intptr_t class_header = Read<int32_t>();
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intptr_t tags = ReadTags();
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USE(tags);
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intptr_t class_id;
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// There is limited support for reading regular dart instances. Only
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// typed data views are currently handled.
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if (SerializedHeaderData::decode(class_header) == kInstanceObjectId) {
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Dart_CObject_Internal* object =
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reinterpret_cast<Dart_CObject_Internal*>(GetBackRef(object_id));
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if (object == NULL) {
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object =
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AllocateDartCObjectInternal(Dart_CObject_Internal::kUninitialized);
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AddBackRef(object_id, object, kIsDeserialized);
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// Read class of object.
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object->cls = reinterpret_cast<Dart_CObject_Internal*>(ReadObjectImpl());
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ASSERT(object->cls->type ==
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static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kClass));
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}
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ASSERT(object->type == static_cast<Dart_CObject_Type>(
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Dart_CObject_Internal::kUninitialized));
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return object;
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}
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ASSERT((class_header & kSmiTagMask) != 0);
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class_id = LookupInternalClass(class_header);
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if ((class_id == kArrayCid) || (class_id == kImmutableArrayCid)) {
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intptr_t len = ReadSmiValue();
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Dart_CObject* value = GetBackRef(object_id);
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if (value == NULL) {
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value = AllocateDartCObjectArray(len);
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AddBackRef(object_id, value, kIsDeserialized);
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}
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// Skip type arguments.
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// TODO(sjesse): Remove this when message serialization format is
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// updated (currently type_arguments is leaked).
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Dart_CObject* type_arguments = ReadObjectImpl();
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if (type_arguments != &type_arguments_marker &&
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type_arguments->type != Dart_CObject_kNull) {
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return AllocateDartCObjectUnsupported();
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}
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for (int i = 0; i < len; i++) {
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value->value.as_array.values[i] = ReadObjectRef();
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}
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return value;
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}
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return ReadInternalVMObject(class_id, object_id);
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}
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Dart_CObject* ApiMessageReader::ReadPredefinedSymbol(intptr_t object_id) {
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ASSERT(Symbols::IsPredefinedSymbolId(object_id));
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intptr_t symbol_id = object_id - kMaxPredefinedObjectIds;
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Dart_CObject* object;
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if (vm_symbol_references_ != NULL &&
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(object = vm_symbol_references_[symbol_id]) != NULL) {
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return object;
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}
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if (vm_symbol_references_ == NULL) {
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intptr_t size =
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(sizeof(*vm_symbol_references_) * Symbols::kMaxPredefinedId);
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vm_symbol_references_ = reinterpret_cast<Dart_CObject**>(allocator(size));
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memset(vm_symbol_references_, 0, size);
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}
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object = CreateDartCObjectString(Symbols::GetPredefinedSymbol(object_id));
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ASSERT(vm_symbol_references_[symbol_id] == NULL);
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vm_symbol_references_[symbol_id] = object;
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return object;
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}
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intptr_t ApiMessageReader::NextAvailableObjectId() const {
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return backward_references_.length() + kMaxPredefinedObjectIds;
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}
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Dart_CObject* ApiMessageReader::CreateDartCObjectString(RawObject* raw) {
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ASSERT(RawObject::IsOneByteStringClassId(raw->GetClassId()));
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RawOneByteString* raw_str = reinterpret_cast<RawOneByteString*>(raw);
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intptr_t len = Smi::Value(raw_str->ptr()->length_);
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Dart_CObject* object = AllocateDartCObjectString(len);
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char* p = object->value.as_string;
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memmove(p, raw_str->ptr()->data(), len);
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p[len] = '\0';
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return object;
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}
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Dart_CObject* ApiMessageReader::GetCanonicalMintObject(Dart_CObject_Type type,
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int64_t value64) {
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Dart_CObject* object = NULL;
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for (intptr_t i = 0; i < vm_isolate_references_.length(); i++) {
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object = vm_isolate_references_.At(i);
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if (object->type == type) {
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if (value64 == object->value.as_int64) {
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return object;
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}
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}
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}
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if (type == Dart_CObject_kInt32) {
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object = AllocateDartCObjectInt32(static_cast<int32_t>(value64));
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} else {
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object = AllocateDartCObjectInt64(value64);
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}
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vm_isolate_references_.Add(object);
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return object;
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}
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Dart_CObject* ApiMessageReader::ReadObjectRef() {
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int64_t value64 = Read<int64_t>();
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if ((value64 & kSmiTagMask) == 0) {
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int64_t untagged_value = value64 >> kSmiTagShift;
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if ((kMinInt32 <= untagged_value) && (untagged_value <= kMaxInt32)) {
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return AllocateDartCObjectInt32(static_cast<int32_t>(untagged_value));
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} else {
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return AllocateDartCObjectInt64(untagged_value);
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}
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}
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ASSERT((value64 <= kIntptrMax) && (value64 >= kIntptrMin));
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intptr_t value = static_cast<intptr_t>(value64);
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if (IsVMIsolateObject(value)) {
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return ReadVMIsolateObject(value);
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}
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if (SerializedHeaderTag::decode(value) == kObjectId) {
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return ReadIndexedObject(SerializedHeaderData::decode(value));
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}
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ASSERT(SerializedHeaderTag::decode(value) == kInlined);
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// Read the class header information and lookup the class.
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intptr_t class_header = Read<int32_t>();
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intptr_t object_id = SerializedHeaderData::decode(value);
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if (object_id == kOmittedObjectId) {
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object_id = NextAvailableObjectId();
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}
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intptr_t tags = ReadTags();
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USE(tags);
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// Reading of regular dart instances has limited support in order to
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// read typed data views.
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if (SerializedHeaderData::decode(class_header) == kInstanceObjectId) {
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Dart_CObject_Internal* object =
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AllocateDartCObjectInternal(Dart_CObject_Internal::kUninitialized);
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AddBackRef(object_id, object, kIsNotDeserialized);
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// Read class of object.
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object->cls = reinterpret_cast<Dart_CObject_Internal*>(ReadObjectImpl());
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ASSERT(object->cls->type ==
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static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kClass));
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return object;
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}
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ASSERT((class_header & kSmiTagMask) != 0);
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intptr_t class_id = LookupInternalClass(class_header);
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if ((class_id == kArrayCid) || (class_id == kImmutableArrayCid)) {
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ASSERT(GetBackRef(object_id) == NULL);
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intptr_t len = ReadSmiValue();
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Dart_CObject* value = AllocateDartCObjectArray(len);
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AddBackRef(object_id, value, kIsNotDeserialized);
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return value;
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}
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return ReadInternalVMObject(class_id, object_id);
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}
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Dart_CObject* ApiMessageReader::ReadVMIsolateObject(intptr_t value) {
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intptr_t object_id = GetVMIsolateObjectId(value);
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if (object_id == kNullObject) {
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return AllocateDartCObjectNull();
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}
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if (object_id == kTrueValue) {
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return AllocateDartCObjectBool(true);
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}
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if (object_id == kFalseValue) {
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return AllocateDartCObjectBool(false);
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}
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if (object_id == kDoubleObject) {
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return AllocateDartCObjectDouble(ReadDouble());
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}
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if (Symbols::IsPredefinedSymbolId(object_id)) {
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return ReadPredefinedSymbol(object_id);
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}
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// No other VM isolate objects are supported.
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return AllocateDartCObjectNull();
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}
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Dart_CObject* ApiMessageReader::ReadInternalVMObject(intptr_t class_id,
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intptr_t object_id) {
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switch (class_id) {
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case kClassCid: {
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Dart_CObject_Internal* object = AllocateDartCObjectClass();
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AddBackRef(object_id, object, kIsDeserialized);
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object->internal.as_class.library_url = ReadObjectImpl();
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ASSERT(object->internal.as_class.library_url->type ==
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Dart_CObject_kString);
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object->internal.as_class.class_name = ReadObjectImpl();
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ASSERT(object->internal.as_class.class_name->type ==
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Dart_CObject_kString);
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return object;
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}
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case kTypeArgumentsCid: {
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// TODO(sjesse): Remove this when message serialization format is
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// updated (currently length is leaked).
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Dart_CObject* value = &type_arguments_marker;
|
|
AddBackRef(object_id, value, kIsDeserialized);
|
|
Dart_CObject* length = ReadObjectImpl();
|
|
ASSERT(length->type == Dart_CObject_kInt32);
|
|
// The instantiations_ field is only written to a full snapshot.
|
|
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: {
|
|
Dart_CObject* value = &dynamic_type_marker;
|
|
AddBackRef(object_id, value, kIsDeserialized);
|
|
intptr_t index = Read<int32_t>();
|
|
USE(index);
|
|
intptr_t token_index = Read<int32_t>();
|
|
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 value64 = Read<int64_t>();
|
|
Dart_CObject* object;
|
|
if ((kMinInt32 <= value64) && (value64 <= kMaxInt32)) {
|
|
object = AllocateDartCObjectInt32(static_cast<int32_t>(value64));
|
|
} else {
|
|
object = AllocateDartCObjectInt64(value64);
|
|
}
|
|
AddBackRef(object_id, object, kIsDeserialized);
|
|
return object;
|
|
}
|
|
case kDoubleCid: {
|
|
// Doubles are handled specially when being sent as part of message
|
|
// snapshots.
|
|
UNREACHABLE();
|
|
}
|
|
case kOneByteStringCid: {
|
|
intptr_t len = ReadSmiValue();
|
|
uint8_t* latin1 =
|
|
reinterpret_cast<uint8_t*>(allocator(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));
|
|
return object;
|
|
}
|
|
case kTwoByteStringCid: {
|
|
intptr_t len = ReadSmiValue();
|
|
uint16_t* utf16 =
|
|
reinterpret_cast<uint16_t*>(allocator(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));
|
|
return object;
|
|
}
|
|
case kSendPortCid: {
|
|
int64_t value64 = Read<int64_t>();
|
|
int64_t originId = Read<uint64_t>();
|
|
Dart_CObject* object = AllocateDartCObject(Dart_CObject_kSendPort);
|
|
object->value.as_send_port.id = value64;
|
|
object->value.as_send_port.origin_id = originId;
|
|
AddBackRef(object_id, object, kIsDeserialized);
|
|
return object;
|
|
}
|
|
case kCapabilityCid: {
|
|
int64_t id = Read<int64_t>();
|
|
Dart_CObject* object = AllocateDartCObject(Dart_CObject_kCapability);
|
|
object->value.as_capability.id = id;
|
|
AddBackRef(object_id, object, kIsDeserialized);
|
|
return object;
|
|
}
|
|
|
|
#define READ_TYPED_DATA(tname, ctype) \
|
|
{ \
|
|
intptr_t len = ReadSmiValue(); \
|
|
auto type = Dart_TypedData_k##tname; \
|
|
intptr_t length_in_bytes = GetTypedDataSizeInBytes(type) * len; \
|
|
Dart_CObject* object = \
|
|
reinterpret_cast<Dart_CObject*>(allocator(sizeof(Dart_CObject))); \
|
|
ASSERT(object != NULL); \
|
|
object->type = Dart_CObject_kTypedData; \
|
|
object->value.as_typed_data.type = type; \
|
|
object->value.as_typed_data.length = length_in_bytes; \
|
|
if (len > 0) { \
|
|
Align(Zone::kAlignment); \
|
|
object->value.as_typed_data.values = \
|
|
const_cast<uint8_t*>(CurrentBufferAddress()); \
|
|
Advance(length_in_bytes); \
|
|
} else { \
|
|
object->value.as_typed_data.values = NULL; \
|
|
} \
|
|
AddBackRef(object_id, object, kIsDeserialized); \
|
|
return object; \
|
|
}
|
|
|
|
#define READ_EXTERNAL_TYPED_DATA(tname, ctype) \
|
|
{ \
|
|
intptr_t len = ReadSmiValue(); \
|
|
auto type = Dart_TypedData_k##tname; \
|
|
intptr_t length_in_bytes = GetTypedDataSizeInBytes(type) * len; \
|
|
Dart_CObject* object = \
|
|
reinterpret_cast<Dart_CObject*>(allocator(sizeof(Dart_CObject))); \
|
|
ASSERT(object != NULL); \
|
|
object->type = Dart_CObject_kTypedData; \
|
|
object->value.as_typed_data.type = type; \
|
|
object->value.as_typed_data.length = length_in_bytes; \
|
|
object->value.as_typed_data.values = \
|
|
reinterpret_cast<uint8_t*>(finalizable_data_->Get().data); \
|
|
AddBackRef(object_id, object, kIsDeserialized); \
|
|
return object; \
|
|
}
|
|
|
|
#define READ_TYPED_DATA_VIEW(tname, ctype) \
|
|
{ \
|
|
Dart_CObject_Internal* object = \
|
|
AllocateDartCObjectInternal(Dart_CObject_Internal::kUninitialized); \
|
|
AddBackRef(object_id, object, kIsDeserialized); \
|
|
object->type = \
|
|
static_cast<Dart_CObject_Type>(Dart_CObject_Internal::kView); \
|
|
object->internal.as_view.offset_in_bytes = ReadSmiValue(); \
|
|
object->internal.as_view.length = ReadSmiValue(); \
|
|
object->internal.as_view.buffer = ReadObjectImpl(); \
|
|
Dart_CObject* buffer = object->internal.as_view.buffer; \
|
|
RELEASE_ASSERT(buffer->type == Dart_CObject_kTypedData); \
|
|
\
|
|
/* Now turn the view into a byte array.*/ \
|
|
const Dart_TypedData_Type type = Dart_TypedData_k##tname; \
|
|
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; \
|
|
return object; \
|
|
}
|
|
|
|
#define TYPED_DATA_LIST(V) \
|
|
V(Int8, int8_t) \
|
|
V(Uint8, uint8_t) \
|
|
V(Uint8Clamped, uint8_t) \
|
|
V(Int16, int16_t) \
|
|
V(Uint16, uint16_t) \
|
|
V(Int32, int32_t) \
|
|
V(Uint32, uint32_t) \
|
|
V(Int64, int64_t) \
|
|
V(Uint64, uint64_t) \
|
|
V(Float32, float) \
|
|
V(Float64, double)
|
|
|
|
#define EMIT_TYPED_DATA_CASES(type, c_type) \
|
|
case kTypedData##type##ArrayCid: \
|
|
READ_TYPED_DATA(type, c_type); \
|
|
case kExternalTypedData##type##ArrayCid: \
|
|
READ_EXTERNAL_TYPED_DATA(type, c_type); \
|
|
case kTypedData##type##ArrayViewCid: \
|
|
READ_TYPED_DATA_VIEW(type, c_type);
|
|
|
|
TYPED_DATA_LIST(EMIT_TYPED_DATA_CASES)
|
|
#undef EMIT_TYPED_DATA_CASES
|
|
#undef TYPED_DATA_LIST
|
|
#undef READ_TYPED_DATA
|
|
#undef READ_EXTERNAL_TYPED_DATA
|
|
#undef READ_TYPED_DATA_VIEW
|
|
|
|
case kGrowableObjectArrayCid: {
|
|
// A GrowableObjectArray is serialized as its type arguments and
|
|
// 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.
|
|
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 and skip the type arguments field.
|
|
// 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();
|
|
}
|
|
|
|
// Read the length field.
|
|
intptr_t len = ReadSmiValue();
|
|
|
|
// Read the content of the GrowableObjectArray.
|
|
Dart_CObject* content = ReadObjectRef();
|
|
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 || object_id == kObjectType) {
|
|
// Always return dynamic type (this is only a marker).
|
|
return &dynamic_type_marker;
|
|
}
|
|
if (object_id == kIntTypeArguments || object_id == kDoubleTypeArguments ||
|
|
object_id == kStringTypeArguments ||
|
|
object_id == kStringDynamicTypeArguments ||
|
|
object_id == kStringStringTypeArguments) {
|
|
return &type_arguments_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 value64 = Read<int64_t>();
|
|
if ((value64 & kSmiTagMask) == 0) {
|
|
int64_t untagged_value = value64 >> kSmiTagShift;
|
|
if ((kMinInt32 <= untagged_value) && (untagged_value <= kMaxInt32)) {
|
|
return AllocateDartCObjectInt32(static_cast<int32_t>(untagged_value));
|
|
} else {
|
|
return AllocateDartCObjectInt64(untagged_value);
|
|
}
|
|
}
|
|
ASSERT((value64 <= kIntptrMax) && (value64 >= kIntptrMin));
|
|
intptr_t value = static_cast<intptr_t>(value64);
|
|
if (IsVMIsolateObject(value)) {
|
|
return ReadVMIsolateObject(value);
|
|
}
|
|
if (SerializedHeaderTag::decode(value) == kObjectId) {
|
|
return ReadIndexedObject(SerializedHeaderData::decode(value));
|
|
}
|
|
ASSERT(SerializedHeaderTag::decode(value) == kInlined);
|
|
|
|
intptr_t object_id = SerializedHeaderData::decode(value);
|
|
if (object_id == kOmittedObjectId) {
|
|
object_id = NextAvailableObjectId();
|
|
}
|
|
return ReadInlinedObject(object_id);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static uint8_t* malloc_allocator(uint8_t* ptr,
|
|
intptr_t old_size,
|
|
intptr_t new_size) {
|
|
void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
|
|
return reinterpret_cast<uint8_t*>(new_ptr);
|
|
}
|
|
|
|
ApiMessageWriter::ApiMessageWriter()
|
|
: BaseWriter(malloc_allocator, NULL, kInitialSize),
|
|
object_id_(0),
|
|
forward_list_(NULL),
|
|
forward_list_length_(0),
|
|
forward_id_(0),
|
|
finalizable_data_(new MessageFinalizableData()) {
|
|
ASSERT(kDartCObjectTypeMask >= Dart_CObject_kNumberOfTypes - 1);
|
|
}
|
|
|
|
ApiMessageWriter::~ApiMessageWriter() {
|
|
::free(forward_list_);
|
|
delete finalizable_data_;
|
|
}
|
|
|
|
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::IsValid(value));
|
|
Write<RawObject*>(Smi::New(static_cast<intptr_t>(value)));
|
|
}
|
|
|
|
void ApiMessageWriter::WriteNullObject() {
|
|
WriteVMIsolateObject(kNullObject);
|
|
}
|
|
|
|
void ApiMessageWriter::WriteMint(Dart_CObject* object, int64_t value) {
|
|
ASSERT(!Smi::IsValid(value));
|
|
// Write out the serialization header value for mint object.
|
|
WriteInlinedHeader(object);
|
|
// Write out the class and tags information.
|
|
WriteIndexedObject(kMintCid);
|
|
WriteTags(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::IsValid(value)) {
|
|
WriteSmi(value);
|
|
} else {
|
|
WriteMint(object, value);
|
|
}
|
|
}
|
|
|
|
void ApiMessageWriter::WriteInt64(Dart_CObject* object) {
|
|
int64_t value = object->value.as_int64;
|
|
if (Smi::IsValid(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) {
|
|
const intptr_t array_length = object->value.as_array.length;
|
|
if (!Array::IsValidLength(array_length)) {
|
|
return false;
|
|
}
|
|
|
|
// Write out the serialization header value for this object.
|
|
WriteInlinedHeader(object);
|
|
// Write out the class and tags information.
|
|
WriteIndexedObject(kArrayCid);
|
|
WriteTags(0);
|
|
// Write out the length information.
|
|
WriteSmi(array_length);
|
|
// Write out the type arguments.
|
|
WriteNullObject();
|
|
// Write out array elements.
|
|
for (int i = 0; i < 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) {
|
|
const intptr_t array_length = object->value.as_array.length;
|
|
if (!Array::IsValidLength(array_length)) {
|
|
return false;
|
|
}
|
|
// Write out the serialization header value for this object.
|
|
WriteInlinedHeader(object);
|
|
// Write out the class information.
|
|
WriteIndexedObject(kArrayCid);
|
|
WriteTags(0);
|
|
// Write out the length information.
|
|
WriteSmi(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);
|
|
const intptr_t array_length = object->value.as_array.length;
|
|
if (!Array::IsValidLength(array_length)) {
|
|
return false;
|
|
}
|
|
|
|
// 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);
|
|
WriteTags(0);
|
|
// Write out the length information.
|
|
WriteSmi(array_length);
|
|
// Write out the type arguments.
|
|
WriteNullObject();
|
|
// Write out array elements.
|
|
for (int i = 0; i < 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_kDouble:
|
|
WriteVMIsolateObject(kDoubleObject);
|
|
WriteDouble(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 = Utf8::kLatin1;
|
|
intptr_t len = Utf8::CodeUnitCount(utf8_str, utf8_len, &type);
|
|
if (len > String::kMaxElements) {
|
|
return false;
|
|
}
|
|
|
|
// Write out the serialization header value for this object.
|
|
WriteInlinedHeader(object);
|
|
// Write out the class and tags information.
|
|
WriteIndexedObject(type == Utf8::kLatin1 ? kOneByteStringCid
|
|
: kTwoByteStringCid);
|
|
WriteTags(0);
|
|
// Write string length and content.
|
|
WriteSmi(len);
|
|
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;
|
|
case Dart_TypedData_kUint32:
|
|
class_id = kTypedDataUint32ArrayCid;
|
|
break;
|
|
default:
|
|
class_id = kTypedDataUint8ArrayCid;
|
|
UNIMPLEMENTED();
|
|
}
|
|
|
|
intptr_t len = object->value.as_typed_data.length;
|
|
if (len < 0 || len > TypedData::MaxElements(class_id)) {
|
|
return false;
|
|
}
|
|
|
|
WriteIndexedObject(class_id);
|
|
WriteTags(0);
|
|
WriteSmi(len);
|
|
switch (class_id) {
|
|
case kTypedDataInt8ArrayCid:
|
|
case kTypedDataUint8ArrayCid: {
|
|
uint8_t* bytes = object->value.as_typed_data.values;
|
|
Align(Zone::kAlignment);
|
|
WriteBytes(bytes, len);
|
|
break;
|
|
}
|
|
case kTypedDataUint32ArrayCid: {
|
|
uint8_t* bytes = object->value.as_typed_data.values;
|
|
Align(Zone::kAlignment);
|
|
WriteBytes(bytes, len * sizeof(uint32_t));
|
|
break;
|
|
}
|
|
default:
|
|
UNIMPLEMENTED();
|
|
}
|
|
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);
|
|
WriteTags(0);
|
|
intptr_t length = object->value.as_external_typed_data.length;
|
|
if (length < 0 || length > ExternalTypedData::MaxElements(
|
|
kExternalTypedDataUint8ArrayCid)) {
|
|
return false;
|
|
}
|
|
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;
|
|
if (callback == NULL) {
|
|
return false;
|
|
}
|
|
WriteSmi(length);
|
|
finalizable_data_->Put(length, reinterpret_cast<void*>(data), peer,
|
|
callback);
|
|
break;
|
|
}
|
|
case Dart_CObject_kSendPort: {
|
|
WriteInlinedHeader(object);
|
|
WriteIndexedObject(kSendPortCid);
|
|
WriteTags(0);
|
|
Write<int64_t>(object->value.as_send_port.id);
|
|
Write<uint64_t>(object->value.as_send_port.origin_id);
|
|
break;
|
|
}
|
|
case Dart_CObject_kCapability: {
|
|
WriteInlinedHeader(object);
|
|
WriteIndexedObject(kCapabilityCid);
|
|
WriteTags(0);
|
|
Write<uint64_t>(object->value.as_capability.id);
|
|
break;
|
|
}
|
|
default:
|
|
FATAL1("Unexpected Dart_CObject_Type %d\n", type);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
std::unique_ptr<Message> ApiMessageWriter::WriteCMessage(
|
|
Dart_CObject* object,
|
|
Dart_Port dest_port,
|
|
Message::Priority priority) {
|
|
bool success = WriteCObject(object);
|
|
if (!success) {
|
|
UnmarkAllCObjects(object);
|
|
free(buffer());
|
|
return nullptr;
|
|
}
|
|
|
|
// 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);
|
|
free(buffer());
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
UnmarkAllCObjects(object);
|
|
MessageFinalizableData* finalizable_data = finalizable_data_;
|
|
finalizable_data_ = NULL;
|
|
return Message::New(dest_port, buffer(), BytesWritten(), finalizable_data,
|
|
priority);
|
|
}
|
|
|
|
} // namespace dart
|