Head

GCC Code Coverage Report

Directory:	../		Exec	Total	Coverage
File:	/home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/node_serdes.cc	Lines:	1	224	0.4 %
Date:	2021-02-19 04:08:54	Branches:	2	108	1.9 %


#include "node_internals.h"
#include "node_buffer.h"
#include "node_errors.h"
#include "util-inl.h"
#include "base_object-inl.h"

namespace node {

using v8::Array;
using v8::ArrayBuffer;
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::Integer;
using v8::Isolate;
using v8::Just;
using v8::Local;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Nothing;
using v8::Object;
using v8::SharedArrayBuffer;
using v8::String;
using v8::Value;
using v8::ValueDeserializer;
using v8::ValueSerializer;

namespace {

class SerializerContext : public BaseObject,
                          public ValueSerializer::Delegate {
 public:
  SerializerContext(Environment* env,
                    Local<Object> wrap);

  ~SerializerContext() override = default;

  void ThrowDataCloneError(Local<String> message) override;
  Maybe<bool> WriteHostObject(Isolate* isolate, Local<Object> object) override;
  Maybe<uint32_t> GetSharedArrayBufferId(
      Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) override;

  static void SetTreatArrayBufferViewsAsHostObjects(
      const FunctionCallbackInfo<Value>& args);

  static void New(const FunctionCallbackInfo<Value>& args);
  static void WriteHeader(const FunctionCallbackInfo<Value>& args);
  static void WriteValue(const FunctionCallbackInfo<Value>& args);
  static void ReleaseBuffer(const FunctionCallbackInfo<Value>& args);
  static void TransferArrayBuffer(const FunctionCallbackInfo<Value>& args);
  static void WriteUint32(const FunctionCallbackInfo<Value>& args);
  static void WriteUint64(const FunctionCallbackInfo<Value>& args);
  static void WriteDouble(const FunctionCallbackInfo<Value>& args);
  static void WriteRawBytes(const FunctionCallbackInfo<Value>& args);

  SET_NO_MEMORY_INFO()
  SET_MEMORY_INFO_NAME(SerializerContext)
  SET_SELF_SIZE(SerializerContext)

 private:
  ValueSerializer serializer_;
};

class DeserializerContext : public BaseObject,
                            public ValueDeserializer::Delegate {
 public:
  DeserializerContext(Environment* env,
                      Local<Object> wrap,
                      Local<Value> buffer);

  ~DeserializerContext() override = default;

  MaybeLocal<Object> ReadHostObject(Isolate* isolate) override;

  static void New(const FunctionCallbackInfo<Value>& args);
  static void ReadHeader(const FunctionCallbackInfo<Value>& args);
  static void ReadValue(const FunctionCallbackInfo<Value>& args);
  static void TransferArrayBuffer(const FunctionCallbackInfo<Value>& args);
  static void GetWireFormatVersion(const FunctionCallbackInfo<Value>& args);
  static void ReadUint32(const FunctionCallbackInfo<Value>& args);
  static void ReadUint64(const FunctionCallbackInfo<Value>& args);
  static void ReadDouble(const FunctionCallbackInfo<Value>& args);
  static void ReadRawBytes(const FunctionCallbackInfo<Value>& args);

  SET_NO_MEMORY_INFO()
  SET_MEMORY_INFO_NAME(DeserializerContext)
  SET_SELF_SIZE(DeserializerContext)

 private:
  const uint8_t* data_;
  const size_t length_;

  ValueDeserializer deserializer_;
};

SerializerContext::SerializerContext(Environment* env, Local<Object> wrap)
  : BaseObject(env, wrap),
    serializer_(env->isolate(), this) {
  MakeWeak();
}

void SerializerContext::ThrowDataCloneError(Local<String> message) {
  Local<Value> args[1] = { message };
  Local<Value> get_data_clone_error =
      object()->Get(env()->context(),
                    env()->get_data_clone_error_string())
                      .ToLocalChecked();

  CHECK(get_data_clone_error->IsFunction());
  MaybeLocal<Value> error =
      get_data_clone_error.As<Function>()->Call(env()->context(),
                                                object(),
                                                arraysize(args),
                                                args);

  if (error.IsEmpty()) return;

  env()->isolate()->ThrowException(error.ToLocalChecked());
}

Maybe<uint32_t> SerializerContext::GetSharedArrayBufferId(
    Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) {
  Local<Value> args[1] = { shared_array_buffer };
  Local<Value> get_shared_array_buffer_id =
      object()->Get(env()->context(),
                    env()->get_shared_array_buffer_id_string())
                      .ToLocalChecked();

  if (!get_shared_array_buffer_id->IsFunction()) {
    return ValueSerializer::Delegate::GetSharedArrayBufferId(
        isolate, shared_array_buffer);
  }

  MaybeLocal<Value> id =
      get_shared_array_buffer_id.As<Function>()->Call(env()->context(),
                                                      object(),
                                                      arraysize(args),
                                                      args);

  if (id.IsEmpty()) return Nothing<uint32_t>();

  return id.ToLocalChecked()->Uint32Value(env()->context());
}

Maybe<bool> SerializerContext::WriteHostObject(Isolate* isolate,
                                               Local<Object> input) {
  MaybeLocal<Value> ret;
  Local<Value> args[1] = { input };

  Local<Value> write_host_object =
      object()->Get(env()->context(),
                    env()->write_host_object_string()).ToLocalChecked();

  if (!write_host_object->IsFunction()) {
    return ValueSerializer::Delegate::WriteHostObject(isolate, input);
  }

  ret = write_host_object.As<Function>()->Call(env()->context(),
                                               object(),
                                               arraysize(args),
                                               args);

  if (ret.IsEmpty())
    return Nothing<bool>();

  return Just(true);
}

void SerializerContext::New(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  if (!args.IsConstructCall()) {
    return THROW_ERR_CONSTRUCT_CALL_REQUIRED(
        env, "Class constructor Serializer cannot be invoked without 'new'");
  }

  new SerializerContext(env, args.This());
}

void SerializerContext::WriteHeader(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
  ctx->serializer_.WriteHeader();
}

void SerializerContext::WriteValue(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
  Maybe<bool> ret =
      ctx->serializer_.WriteValue(ctx->env()->context(), args[0]);

  if (ret.IsJust()) args.GetReturnValue().Set(ret.FromJust());
}

void SerializerContext::SetTreatArrayBufferViewsAsHostObjects(
    const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  bool value = args[0]->BooleanValue(ctx->env()->isolate());
  ctx->serializer_.SetTreatArrayBufferViewsAsHostObjects(value);
}

void SerializerContext::ReleaseBuffer(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  // Note: Both ValueSerializer and this Buffer::New() variant use malloc()
  // as the underlying allocator.
  std::pair<uint8_t*, size_t> ret = ctx->serializer_.Release();
  auto buf = Buffer::New(ctx->env(),
                         reinterpret_cast<char*>(ret.first),
                         ret.second);

  if (!buf.IsEmpty()) {
    args.GetReturnValue().Set(buf.ToLocalChecked());
  }
}

void SerializerContext::TransferArrayBuffer(
    const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<uint32_t> id = args[0]->Uint32Value(ctx->env()->context());
  if (id.IsNothing()) return;

  if (!args[1]->IsArrayBuffer())
    return node::THROW_ERR_INVALID_ARG_TYPE(
        ctx->env(), "arrayBuffer must be an ArrayBuffer");

  Local<ArrayBuffer> ab = args[1].As<ArrayBuffer>();
  ctx->serializer_.TransferArrayBuffer(id.FromJust(), ab);
  return;
}

void SerializerContext::WriteUint32(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<uint32_t> value = args[0]->Uint32Value(ctx->env()->context());
  if (value.IsNothing()) return;

  ctx->serializer_.WriteUint32(value.FromJust());
}

void SerializerContext::WriteUint64(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<uint32_t> arg0 = args[0]->Uint32Value(ctx->env()->context());
  Maybe<uint32_t> arg1 = args[1]->Uint32Value(ctx->env()->context());
  if (arg0.IsNothing() || arg1.IsNothing())
    return;

  uint64_t hi = arg0.FromJust();
  uint64_t lo = arg1.FromJust();
  ctx->serializer_.WriteUint64((hi << 32) | lo);
}

void SerializerContext::WriteDouble(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<double> value = args[0]->NumberValue(ctx->env()->context());
  if (value.IsNothing()) return;

  ctx->serializer_.WriteDouble(value.FromJust());
}

void SerializerContext::WriteRawBytes(const FunctionCallbackInfo<Value>& args) {
  SerializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  if (!args[0]->IsArrayBufferView()) {
    return node::THROW_ERR_INVALID_ARG_TYPE(
        ctx->env(), "source must be a TypedArray or a DataView");
  }

  ArrayBufferViewContents<char> bytes(args[0]);
  ctx->serializer_.WriteRawBytes(bytes.data(), bytes.length());
}

DeserializerContext::DeserializerContext(Environment* env,
                                         Local<Object> wrap,
                                         Local<Value> buffer)
  : BaseObject(env, wrap),
    data_(reinterpret_cast<const uint8_t*>(Buffer::Data(buffer))),
    length_(Buffer::Length(buffer)),
    deserializer_(env->isolate(), data_, length_, this) {
  object()->Set(env->context(), env->buffer_string(), buffer).Check();

  MakeWeak();
}

MaybeLocal<Object> DeserializerContext::ReadHostObject(Isolate* isolate) {
  Local<Value> read_host_object =
      object()->Get(env()->context(),
                    env()->read_host_object_string()).ToLocalChecked();

  if (!read_host_object->IsFunction()) {
    return ValueDeserializer::Delegate::ReadHostObject(isolate);
  }

  Isolate::AllowJavascriptExecutionScope allow_js(isolate);
  MaybeLocal<Value> ret =
      read_host_object.As<Function>()->Call(env()->context(),
                                            object(),
                                            0,
                                            nullptr);

  if (ret.IsEmpty())
    return MaybeLocal<Object>();

  Local<Value> return_value = ret.ToLocalChecked();
  if (!return_value->IsObject()) {
    env()->ThrowTypeError("readHostObject must return an object");
    return MaybeLocal<Object>();
  }

  return return_value.As<Object>();
}

void DeserializerContext::New(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  if (!args.IsConstructCall()) {
    return THROW_ERR_CONSTRUCT_CALL_REQUIRED(
        env, "Class constructor Deserializer cannot be invoked without 'new'");
  }

  if (!args[0]->IsArrayBufferView()) {
    return node::THROW_ERR_INVALID_ARG_TYPE(
        env, "buffer must be a TypedArray or a DataView");
  }

  new DeserializerContext(env, args.This(), args[0]);
}

void DeserializerContext::ReadHeader(const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<bool> ret = ctx->deserializer_.ReadHeader(ctx->env()->context());

  if (ret.IsJust()) args.GetReturnValue().Set(ret.FromJust());
}

void DeserializerContext::ReadValue(const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  MaybeLocal<Value> ret = ctx->deserializer_.ReadValue(ctx->env()->context());

  if (!ret.IsEmpty()) args.GetReturnValue().Set(ret.ToLocalChecked());
}

void DeserializerContext::TransferArrayBuffer(
    const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<uint32_t> id = args[0]->Uint32Value(ctx->env()->context());
  if (id.IsNothing()) return;

  if (args[1]->IsArrayBuffer()) {
    Local<ArrayBuffer> ab = args[1].As<ArrayBuffer>();
    ctx->deserializer_.TransferArrayBuffer(id.FromJust(), ab);
    return;
  }

  if (args[1]->IsSharedArrayBuffer()) {
    Local<SharedArrayBuffer> sab = args[1].As<SharedArrayBuffer>();
    ctx->deserializer_.TransferSharedArrayBuffer(id.FromJust(), sab);
    return;
  }

  return node::THROW_ERR_INVALID_ARG_TYPE(
      ctx->env(), "arrayBuffer must be an ArrayBuffer or SharedArrayBuffer");
}

void DeserializerContext::GetWireFormatVersion(
    const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  args.GetReturnValue().Set(ctx->deserializer_.GetWireFormatVersion());
}

void DeserializerContext::ReadUint32(const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  uint32_t value;
  bool ok = ctx->deserializer_.ReadUint32(&value);
  if (!ok) return ctx->env()->ThrowError("ReadUint32() failed");
  return args.GetReturnValue().Set(value);
}

void DeserializerContext::ReadUint64(const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  uint64_t value;
  bool ok = ctx->deserializer_.ReadUint64(&value);
  if (!ok) return ctx->env()->ThrowError("ReadUint64() failed");

  uint32_t hi = static_cast<uint32_t>(value >> 32);
  uint32_t lo = static_cast<uint32_t>(value);

  Isolate* isolate = ctx->env()->isolate();

  Local<Value> ret[] = {
    Integer::NewFromUnsigned(isolate, hi),
    Integer::NewFromUnsigned(isolate, lo)
  };
  return args.GetReturnValue().Set(Array::New(isolate, ret, arraysize(ret)));
}

void DeserializerContext::ReadDouble(const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  double value;
  bool ok = ctx->deserializer_.ReadDouble(&value);
  if (!ok) return ctx->env()->ThrowError("ReadDouble() failed");
  return args.GetReturnValue().Set(value);
}

void DeserializerContext::ReadRawBytes(
    const FunctionCallbackInfo<Value>& args) {
  DeserializerContext* ctx;
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());

  Maybe<int64_t> length_arg = args[0]->IntegerValue(ctx->env()->context());
  if (length_arg.IsNothing()) return;
  size_t length = length_arg.FromJust();

  const void* data;
  bool ok = ctx->deserializer_.ReadRawBytes(length, &data);
  if (!ok) return ctx->env()->ThrowError("ReadRawBytes() failed");

  const uint8_t* position = reinterpret_cast<const uint8_t*>(data);
  CHECK_GE(position, ctx->data_);
  CHECK_LE(position + length, ctx->data_ + ctx->length_);

  const uint32_t offset = position - ctx->data_;
  CHECK_EQ(ctx->data_ + offset, position);

  args.GetReturnValue().Set(offset);
}

void Initialize(Local<Object> target,
                Local<Value> unused,
                Local<Context> context,
                void* priv) {
  Environment* env = Environment::GetCurrent(context);
  Local<FunctionTemplate> ser =
      env->NewFunctionTemplate(SerializerContext::New);

  ser->InstanceTemplate()->SetInternalFieldCount(
      SerializerContext::kInternalFieldCount);
  ser->Inherit(BaseObject::GetConstructorTemplate(env));

  env->SetProtoMethod(ser, "writeHeader", SerializerContext::WriteHeader);
  env->SetProtoMethod(ser, "writeValue", SerializerContext::WriteValue);
  env->SetProtoMethod(ser, "releaseBuffer", SerializerContext::ReleaseBuffer);
  env->SetProtoMethod(ser,
                      "transferArrayBuffer",
                      SerializerContext::TransferArrayBuffer);
  env->SetProtoMethod(ser, "writeUint32", SerializerContext::WriteUint32);
  env->SetProtoMethod(ser, "writeUint64", SerializerContext::WriteUint64);
  env->SetProtoMethod(ser, "writeDouble", SerializerContext::WriteDouble);
  env->SetProtoMethod(ser, "writeRawBytes", SerializerContext::WriteRawBytes);
  env->SetProtoMethod(ser,
                      "_setTreatArrayBufferViewsAsHostObjects",
                      SerializerContext::SetTreatArrayBufferViewsAsHostObjects);

  ser->ReadOnlyPrototype();
  env->SetConstructorFunction(target, "Serializer", ser);

  Local<FunctionTemplate> des =
      env->NewFunctionTemplate(DeserializerContext::New);

  des->InstanceTemplate()->SetInternalFieldCount(
      DeserializerContext::kInternalFieldCount);
  des->Inherit(BaseObject::GetConstructorTemplate(env));

  env->SetProtoMethod(des, "readHeader", DeserializerContext::ReadHeader);
  env->SetProtoMethod(des, "readValue", DeserializerContext::ReadValue);
  env->SetProtoMethod(des,
                      "getWireFormatVersion",
                      DeserializerContext::GetWireFormatVersion);
  env->SetProtoMethod(des,
                      "transferArrayBuffer",
                      DeserializerContext::TransferArrayBuffer);
  env->SetProtoMethod(des, "readUint32", DeserializerContext::ReadUint32);
  env->SetProtoMethod(des, "readUint64", DeserializerContext::ReadUint64);
  env->SetProtoMethod(des, "readDouble", DeserializerContext::ReadDouble);
  env->SetProtoMethod(des, "_readRawBytes", DeserializerContext::ReadRawBytes);

  des->SetLength(1);
  des->ReadOnlyPrototype();
  env->SetConstructorFunction(target, "Deserializer", des);
}

}  // anonymous namespace
}  // namespace node

NODE_MODULE_CONTEXT_AWARE_INTERNAL(serdes, node::Initialize)


Generated by: GCOVR (Version 3.4)

Line	Branch	Exec	Source
1			#include "node_internals.h"
2			#include "node_buffer.h"
3			#include "node_errors.h"
4			#include "util-inl.h"
5			#include "base_object-inl.h"
6
7			namespace node {
8
9			using v8::Array;
10			using v8::ArrayBuffer;
11			using v8::Context;
12			using v8::Function;
13			using v8::FunctionCallbackInfo;
14			using v8::FunctionTemplate;
15			using v8::Integer;
16			using v8::Isolate;
17			using v8::Just;
18			using v8::Local;
19			using v8::Maybe;
20			using v8::MaybeLocal;
21			using v8::Nothing;
22			using v8::Object;
23			using v8::SharedArrayBuffer;
24			using v8::String;
25			using v8::Value;
26			using v8::ValueDeserializer;
27			using v8::ValueSerializer;
28
29			namespace {
30
31			class SerializerContext : public BaseObject,
32			public ValueSerializer::Delegate {
33			public:
34			SerializerContext(Environment* env,
35			Local<Object> wrap);
36
37			~SerializerContext() override = default;
38
39			void ThrowDataCloneError(Local<String> message) override;
40			Maybe<bool> WriteHostObject(Isolate* isolate, Local<Object> object) override;
41			Maybe<uint32_t> GetSharedArrayBufferId(
42			Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) override;
43
44			static void SetTreatArrayBufferViewsAsHostObjects(
45			const FunctionCallbackInfo<Value>& args);
46
47			static void New(const FunctionCallbackInfo<Value>& args);
48			static void WriteHeader(const FunctionCallbackInfo<Value>& args);
49			static void WriteValue(const FunctionCallbackInfo<Value>& args);
50			static void ReleaseBuffer(const FunctionCallbackInfo<Value>& args);
51			static void TransferArrayBuffer(const FunctionCallbackInfo<Value>& args);
52			static void WriteUint32(const FunctionCallbackInfo<Value>& args);
53			static void WriteUint64(const FunctionCallbackInfo<Value>& args);
54			static void WriteDouble(const FunctionCallbackInfo<Value>& args);
55			static void WriteRawBytes(const FunctionCallbackInfo<Value>& args);
56
57			SET_NO_MEMORY_INFO()
58			SET_MEMORY_INFO_NAME(SerializerContext)
59			SET_SELF_SIZE(SerializerContext)
60
61			private:
62			ValueSerializer serializer_;
63			};
64
65			class DeserializerContext : public BaseObject,
66			public ValueDeserializer::Delegate {
67			public:
68			DeserializerContext(Environment* env,
69			Local<Object> wrap,
70			Local<Value> buffer);
71
72			~DeserializerContext() override = default;
73
74			MaybeLocal<Object> ReadHostObject(Isolate* isolate) override;
75
76			static void New(const FunctionCallbackInfo<Value>& args);
77			static void ReadHeader(const FunctionCallbackInfo<Value>& args);
78			static void ReadValue(const FunctionCallbackInfo<Value>& args);
79			static void TransferArrayBuffer(const FunctionCallbackInfo<Value>& args);
80			static void GetWireFormatVersion(const FunctionCallbackInfo<Value>& args);
81			static void ReadUint32(const FunctionCallbackInfo<Value>& args);
82			static void ReadUint64(const FunctionCallbackInfo<Value>& args);
83			static void ReadDouble(const FunctionCallbackInfo<Value>& args);
84			static void ReadRawBytes(const FunctionCallbackInfo<Value>& args);
85
86			SET_NO_MEMORY_INFO()
87			SET_MEMORY_INFO_NAME(DeserializerContext)
88			SET_SELF_SIZE(DeserializerContext)
89
90			private:
91			const uint8_t* data_;
92			const size_t length_;
93
94			ValueDeserializer deserializer_;
95			};
96
97			SerializerContext::SerializerContext(Environment* env, Local<Object> wrap)
98			: BaseObject(env, wrap),
99			serializer_(env->isolate(), this) {
100			MakeWeak();
101			}
102
103			void SerializerContext::ThrowDataCloneError(Local<String> message) {
104			Local<Value> args[1] = { message };
105			Local<Value> get_data_clone_error =
106			object()->Get(env()->context(),
107			env()->get_data_clone_error_string())
108			.ToLocalChecked();
109
110			CHECK(get_data_clone_error->IsFunction());
111			MaybeLocal<Value> error =
112			get_data_clone_error.As<Function>()->Call(env()->context(),
113			object(),
114			arraysize(args),
115			args);
116
117			if (error.IsEmpty()) return;
118
119			env()->isolate()->ThrowException(error.ToLocalChecked());
120			}
121
122			Maybe<uint32_t> SerializerContext::GetSharedArrayBufferId(
123			Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) {
124			Local<Value> args[1] = { shared_array_buffer };
125			Local<Value> get_shared_array_buffer_id =
126			object()->Get(env()->context(),
127			env()->get_shared_array_buffer_id_string())
128			.ToLocalChecked();
129
130			if (!get_shared_array_buffer_id->IsFunction()) {
131			return ValueSerializer::Delegate::GetSharedArrayBufferId(
132			isolate, shared_array_buffer);
133			}
134
135			MaybeLocal<Value> id =
136			get_shared_array_buffer_id.As<Function>()->Call(env()->context(),
137			object(),
138			arraysize(args),
139			args);
140
141			if (id.IsEmpty()) return Nothing<uint32_t>();
142
143			return id.ToLocalChecked()->Uint32Value(env()->context());
144			}
145
146			Maybe<bool> SerializerContext::WriteHostObject(Isolate* isolate,
147			Local<Object> input) {
148			MaybeLocal<Value> ret;
149			Local<Value> args[1] = { input };
150
151			Local<Value> write_host_object =
152			object()->Get(env()->context(),
153			env()->write_host_object_string()).ToLocalChecked();
154
155			if (!write_host_object->IsFunction()) {
156			return ValueSerializer::Delegate::WriteHostObject(isolate, input);
157			}
158
159			ret = write_host_object.As<Function>()->Call(env()->context(),
160			object(),
161			arraysize(args),
162			args);
163
164			if (ret.IsEmpty())
165			return Nothing<bool>();
166
167			return Just(true);
168			}
169
170			void SerializerContext::New(const FunctionCallbackInfo<Value>& args) {
171			Environment* env = Environment::GetCurrent(args);
172			if (!args.IsConstructCall()) {
173			return THROW_ERR_CONSTRUCT_CALL_REQUIRED(
174			env, "Class constructor Serializer cannot be invoked without 'new'");
175			}
176
177			new SerializerContext(env, args.This());
178			}
179
180			void SerializerContext::WriteHeader(const FunctionCallbackInfo<Value>& args) {
181			SerializerContext* ctx;
182			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
183			ctx->serializer_.WriteHeader();
184			}
185
186			void SerializerContext::WriteValue(const FunctionCallbackInfo<Value>& args) {
187			SerializerContext* ctx;
188			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
189			Maybe<bool> ret =
190			ctx->serializer_.WriteValue(ctx->env()->context(), args[0]);
191
192			if (ret.IsJust()) args.GetReturnValue().Set(ret.FromJust());
193			}
194
195			void SerializerContext::SetTreatArrayBufferViewsAsHostObjects(
196			const FunctionCallbackInfo<Value>& args) {
197			SerializerContext* ctx;
198			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
199
200			bool value = args[0]->BooleanValue(ctx->env()->isolate());
201			ctx->serializer_.SetTreatArrayBufferViewsAsHostObjects(value);
202			}
203
204			void SerializerContext::ReleaseBuffer(const FunctionCallbackInfo<Value>& args) {
205			SerializerContext* ctx;
206			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
207
208			// Note: Both ValueSerializer and this Buffer::New() variant use malloc()
209			// as the underlying allocator.
210			std::pair<uint8_t*, size_t> ret = ctx->serializer_.Release();
211			auto buf = Buffer::New(ctx->env(),
212			reinterpret_cast<char*>(ret.first),
213			ret.second);
214
215			if (!buf.IsEmpty()) {
216			args.GetReturnValue().Set(buf.ToLocalChecked());
217			}
218			}
219
220			void SerializerContext::TransferArrayBuffer(
221			const FunctionCallbackInfo<Value>& args) {
222			SerializerContext* ctx;
223			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
224
225			Maybe<uint32_t> id = args[0]->Uint32Value(ctx->env()->context());
226			if (id.IsNothing()) return;
227
228			if (!args[1]->IsArrayBuffer())
229			return node::THROW_ERR_INVALID_ARG_TYPE(
230			ctx->env(), "arrayBuffer must be an ArrayBuffer");
231
232			Local<ArrayBuffer> ab = args[1].As<ArrayBuffer>();
233			ctx->serializer_.TransferArrayBuffer(id.FromJust(), ab);
234			return;
235			}
236
237			void SerializerContext::WriteUint32(const FunctionCallbackInfo<Value>& args) {
238			SerializerContext* ctx;
239			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
240
241			Maybe<uint32_t> value = args[0]->Uint32Value(ctx->env()->context());
242			if (value.IsNothing()) return;
243
244			ctx->serializer_.WriteUint32(value.FromJust());
245			}
246
247			void SerializerContext::WriteUint64(const FunctionCallbackInfo<Value>& args) {
248			SerializerContext* ctx;
249			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
250
251			Maybe<uint32_t> arg0 = args[0]->Uint32Value(ctx->env()->context());
252			Maybe<uint32_t> arg1 = args[1]->Uint32Value(ctx->env()->context());
253			if (arg0.IsNothing() \|\| arg1.IsNothing())
254			return;
255
256			uint64_t hi = arg0.FromJust();
257			uint64_t lo = arg1.FromJust();
258			ctx->serializer_.WriteUint64((hi << 32) \| lo);
259			}
260
261			void SerializerContext::WriteDouble(const FunctionCallbackInfo<Value>& args) {
262			SerializerContext* ctx;
263			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
264
265			Maybe<double> value = args[0]->NumberValue(ctx->env()->context());
266			if (value.IsNothing()) return;
267
268			ctx->serializer_.WriteDouble(value.FromJust());
269			}
270
271			void SerializerContext::WriteRawBytes(const FunctionCallbackInfo<Value>& args) {
272			SerializerContext* ctx;
273			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
274
275			if (!args[0]->IsArrayBufferView()) {
276			return node::THROW_ERR_INVALID_ARG_TYPE(
277			ctx->env(), "source must be a TypedArray or a DataView");
278			}
279
280			ArrayBufferViewContents<char> bytes(args[0]);
281			ctx->serializer_.WriteRawBytes(bytes.data(), bytes.length());
282			}
283
284			DeserializerContext::DeserializerContext(Environment* env,
285			Local<Object> wrap,
286			Local<Value> buffer)
287			: BaseObject(env, wrap),
288			data_(reinterpret_cast<const uint8_t*>(Buffer::Data(buffer))),
289			length_(Buffer::Length(buffer)),
290			deserializer_(env->isolate(), data_, length_, this) {
291			object()->Set(env->context(), env->buffer_string(), buffer).Check();
292
293			MakeWeak();
294			}
295
296			MaybeLocal<Object> DeserializerContext::ReadHostObject(Isolate* isolate) {
297			Local<Value> read_host_object =
298			object()->Get(env()->context(),
299			env()->read_host_object_string()).ToLocalChecked();
300
301			if (!read_host_object->IsFunction()) {
302			return ValueDeserializer::Delegate::ReadHostObject(isolate);
303			}
304
305			Isolate::AllowJavascriptExecutionScope allow_js(isolate);
306			MaybeLocal<Value> ret =
307			read_host_object.As<Function>()->Call(env()->context(),
308			object(),
309			0,
310			nullptr);
311
312			if (ret.IsEmpty())
313			return MaybeLocal<Object>();
314
315			Local<Value> return_value = ret.ToLocalChecked();
316			if (!return_value->IsObject()) {
317			env()->ThrowTypeError("readHostObject must return an object");
318			return MaybeLocal<Object>();
319			}
320
321			return return_value.As<Object>();
322			}
323
324			void DeserializerContext::New(const FunctionCallbackInfo<Value>& args) {
325			Environment* env = Environment::GetCurrent(args);
326			if (!args.IsConstructCall()) {
327			return THROW_ERR_CONSTRUCT_CALL_REQUIRED(
328			env, "Class constructor Deserializer cannot be invoked without 'new'");
329			}
330
331			if (!args[0]->IsArrayBufferView()) {
332			return node::THROW_ERR_INVALID_ARG_TYPE(
333			env, "buffer must be a TypedArray or a DataView");
334			}
335
336			new DeserializerContext(env, args.This(), args[0]);
337			}
338
339			void DeserializerContext::ReadHeader(const FunctionCallbackInfo<Value>& args) {
340			DeserializerContext* ctx;
341			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
342
343			Maybe<bool> ret = ctx->deserializer_.ReadHeader(ctx->env()->context());
344
345			if (ret.IsJust()) args.GetReturnValue().Set(ret.FromJust());
346			}
347
348			void DeserializerContext::ReadValue(const FunctionCallbackInfo<Value>& args) {
349			DeserializerContext* ctx;
350			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
351
352			MaybeLocal<Value> ret = ctx->deserializer_.ReadValue(ctx->env()->context());
353
354			if (!ret.IsEmpty()) args.GetReturnValue().Set(ret.ToLocalChecked());
355			}
356
357			void DeserializerContext::TransferArrayBuffer(
358			const FunctionCallbackInfo<Value>& args) {
359			DeserializerContext* ctx;
360			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
361
362			Maybe<uint32_t> id = args[0]->Uint32Value(ctx->env()->context());
363			if (id.IsNothing()) return;
364
365			if (args[1]->IsArrayBuffer()) {
366			Local<ArrayBuffer> ab = args[1].As<ArrayBuffer>();
367			ctx->deserializer_.TransferArrayBuffer(id.FromJust(), ab);
368			return;
369			}
370
371			if (args[1]->IsSharedArrayBuffer()) {
372			Local<SharedArrayBuffer> sab = args[1].As<SharedArrayBuffer>();
373			ctx->deserializer_.TransferSharedArrayBuffer(id.FromJust(), sab);
374			return;
375			}
376
377			return node::THROW_ERR_INVALID_ARG_TYPE(
378			ctx->env(), "arrayBuffer must be an ArrayBuffer or SharedArrayBuffer");
379			}
380
381			void DeserializerContext::GetWireFormatVersion(
382			const FunctionCallbackInfo<Value>& args) {
383			DeserializerContext* ctx;
384			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
385
386			args.GetReturnValue().Set(ctx->deserializer_.GetWireFormatVersion());
387			}
388
389			void DeserializerContext::ReadUint32(const FunctionCallbackInfo<Value>& args) {
390			DeserializerContext* ctx;
391			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
392
393			uint32_t value;
394			bool ok = ctx->deserializer_.ReadUint32(&value);
395			if (!ok) return ctx->env()->ThrowError("ReadUint32() failed");
396			return args.GetReturnValue().Set(value);
397			}
398
399			void DeserializerContext::ReadUint64(const FunctionCallbackInfo<Value>& args) {
400			DeserializerContext* ctx;
401			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
402
403			uint64_t value;
404			bool ok = ctx->deserializer_.ReadUint64(&value);
405			if (!ok) return ctx->env()->ThrowError("ReadUint64() failed");
406
407			uint32_t hi = static_cast<uint32_t>(value >> 32);
408			uint32_t lo = static_cast<uint32_t>(value);
409
410			Isolate* isolate = ctx->env()->isolate();
411
412			Local<Value> ret[] = {
413			Integer::NewFromUnsigned(isolate, hi),
414			Integer::NewFromUnsigned(isolate, lo)
415			};
416			return args.GetReturnValue().Set(Array::New(isolate, ret, arraysize(ret)));
417			}
418
419			void DeserializerContext::ReadDouble(const FunctionCallbackInfo<Value>& args) {
420			DeserializerContext* ctx;
421			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
422
423			double value;
424			bool ok = ctx->deserializer_.ReadDouble(&value);
425			if (!ok) return ctx->env()->ThrowError("ReadDouble() failed");
426			return args.GetReturnValue().Set(value);
427			}
428
429			void DeserializerContext::ReadRawBytes(
430			const FunctionCallbackInfo<Value>& args) {
431			DeserializerContext* ctx;
432			ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
433
434			Maybe<int64_t> length_arg = args[0]->IntegerValue(ctx->env()->context());
435			if (length_arg.IsNothing()) return;
436			size_t length = length_arg.FromJust();
437
438			const void* data;
439			bool ok = ctx->deserializer_.ReadRawBytes(length, &data);
440			if (!ok) return ctx->env()->ThrowError("ReadRawBytes() failed");
441
442			const uint8_t* position = reinterpret_cast<const uint8_t*>(data);
443			CHECK_GE(position, ctx->data_);
444			CHECK_LE(position + length, ctx->data_ + ctx->length_);
445
446			const uint32_t offset = position - ctx->data_;
447			CHECK_EQ(ctx->data_ + offset, position);
448
449			args.GetReturnValue().Set(offset);
450			}
451
452			void Initialize(Local<Object> target,
453			Local<Value> unused,
454			Local<Context> context,
455			void* priv) {
456			Environment* env = Environment::GetCurrent(context);
457			Local<FunctionTemplate> ser =
458			env->NewFunctionTemplate(SerializerContext::New);
459
460			ser->InstanceTemplate()->SetInternalFieldCount(
461			SerializerContext::kInternalFieldCount);
462			ser->Inherit(BaseObject::GetConstructorTemplate(env));
463
464			env->SetProtoMethod(ser, "writeHeader", SerializerContext::WriteHeader);
465			env->SetProtoMethod(ser, "writeValue", SerializerContext::WriteValue);
466			env->SetProtoMethod(ser, "releaseBuffer", SerializerContext::ReleaseBuffer);
467			env->SetProtoMethod(ser,
468			"transferArrayBuffer",
469			SerializerContext::TransferArrayBuffer);
470			env->SetProtoMethod(ser, "writeUint32", SerializerContext::WriteUint32);
471			env->SetProtoMethod(ser, "writeUint64", SerializerContext::WriteUint64);
472			env->SetProtoMethod(ser, "writeDouble", SerializerContext::WriteDouble);
473			env->SetProtoMethod(ser, "writeRawBytes", SerializerContext::WriteRawBytes);
474			env->SetProtoMethod(ser,
475			"_setTreatArrayBufferViewsAsHostObjects",
476			SerializerContext::SetTreatArrayBufferViewsAsHostObjects);
477
478			ser->ReadOnlyPrototype();
479			env->SetConstructorFunction(target, "Serializer", ser);
480
481			Local<FunctionTemplate> des =
482			env->NewFunctionTemplate(DeserializerContext::New);
483
484			des->InstanceTemplate()->SetInternalFieldCount(
485			DeserializerContext::kInternalFieldCount);
486			des->Inherit(BaseObject::GetConstructorTemplate(env));
487
488			env->SetProtoMethod(des, "readHeader", DeserializerContext::ReadHeader);
489			env->SetProtoMethod(des, "readValue", DeserializerContext::ReadValue);
490			env->SetProtoMethod(des,
491			"getWireFormatVersion",
492			DeserializerContext::GetWireFormatVersion);
493			env->SetProtoMethod(des,
494			"transferArrayBuffer",
495			DeserializerContext::TransferArrayBuffer);
496			env->SetProtoMethod(des, "readUint32", DeserializerContext::ReadUint32);
497			env->SetProtoMethod(des, "readUint64", DeserializerContext::ReadUint64);
498			env->SetProtoMethod(des, "readDouble", DeserializerContext::ReadDouble);
499			env->SetProtoMethod(des, "_readRawBytes", DeserializerContext::ReadRawBytes);
500
501			des->SetLength(1);
502			des->ReadOnlyPrototype();
503			env->SetConstructorFunction(target, "Deserializer", des);
504			}
505
506			} // anonymous namespace
507			} // namespace node
508
509	✓✗✓✗	481	NODE_MODULE_CONTEXT_AWARE_INTERNAL(serdes, node::Initialize)