Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	node_util.cc	Lines:	236	262	90.1 %
Date:	2022-09-22 04:22:24	Branches:	90	147	61.2 %


#include "node_util.h"
#include "base_object-inl.h"
#include "node_errors.h"
#include "node_external_reference.h"
#include "util-inl.h"

namespace node {
namespace util {

using v8::ALL_PROPERTIES;
using v8::Array;
using v8::ArrayBufferView;
using v8::BigInt;
using v8::Boolean;
using v8::Context;
using v8::External;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::IndexFilter;
using v8::Integer;
using v8::Isolate;
using v8::KeyCollectionMode;
using v8::Local;
using v8::Object;
using v8::ONLY_CONFIGURABLE;
using v8::ONLY_ENUMERABLE;
using v8::ONLY_WRITABLE;
using v8::Private;
using v8::Promise;
using v8::PropertyFilter;
using v8::Proxy;
using v8::SKIP_STRINGS;
using v8::SKIP_SYMBOLS;
using v8::String;
using v8::Uint32;
using v8::Value;

// Used in ToUSVString().
constexpr char16_t kUnicodeReplacementCharacter = 0xFFFD;

// If a UTF-16 character is a low/trailing surrogate.
CHAR_TEST(16, IsUnicodeTrail, (ch & 0xFC00) == 0xDC00)

// If a UTF-16 character is a surrogate.
CHAR_TEST(16, IsUnicodeSurrogate, (ch & 0xF800) == 0xD800)

// If a UTF-16 surrogate is a low/trailing one.
CHAR_TEST(16, IsUnicodeSurrogateTrail, (ch & 0x400) != 0)

static void GetOwnNonIndexProperties(
    const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  Local<Context> context = env->context();

  CHECK(args[0]->IsObject());
  CHECK(args[1]->IsUint32());

  Local<Object> object = args[0].As<Object>();

  Local<Array> properties;

  PropertyFilter filter =
    static_cast<PropertyFilter>(args[1].As<Uint32>()->Value());

  if (!object->GetPropertyNames(
        context, KeyCollectionMode::kOwnOnly,
        filter,
        IndexFilter::kSkipIndices)
          .ToLocal(&properties)) {
    return;
  }
  args.GetReturnValue().Set(properties);
}

static void GetConstructorName(
    const FunctionCallbackInfo<Value>& args) {
  CHECK(args[0]->IsObject());

  Local<Object> object = args[0].As<Object>();
  Local<String> name = object->GetConstructorName();

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

static void GetExternalValue(
    const FunctionCallbackInfo<Value>& args) {
  CHECK(args[0]->IsExternal());
  Isolate* isolate = args.GetIsolate();
  Local<External> external = args[0].As<External>();

  void* ptr = external->Value();
  uint64_t value = reinterpret_cast<uint64_t>(ptr);
  Local<BigInt> ret = BigInt::NewFromUnsigned(isolate, value);
  args.GetReturnValue().Set(ret);
}

static void GetPromiseDetails(const FunctionCallbackInfo<Value>& args) {
  // Return undefined if it's not a Promise.
  if (!args[0]->IsPromise())
    return;

  auto isolate = args.GetIsolate();

  Local<Promise> promise = args[0].As<Promise>();

  int state = promise->State();
  Local<Value> values[2] = { Integer::New(isolate, state) };
  size_t number_of_values = 1;
  if (state != Promise::PromiseState::kPending)
    values[number_of_values++] = promise->Result();
  Local<Array> ret = Array::New(isolate, values, number_of_values);
  args.GetReturnValue().Set(ret);
}

static void GetProxyDetails(const FunctionCallbackInfo<Value>& args) {
  // Return undefined if it's not a proxy.
  if (!args[0]->IsProxy())
    return;

  Local<Proxy> proxy = args[0].As<Proxy>();

  // TODO(BridgeAR): Remove the length check as soon as we prohibit access to
  // the util binding layer. It's accessed in the wild and `esm` would break in
  // case the check is removed.
  if (args.Length() == 1 || args[1]->IsTrue()) {
    Local<Value> ret[] = {
      proxy->GetTarget(),
      proxy->GetHandler()
    };

    args.GetReturnValue().Set(
        Array::New(args.GetIsolate(), ret, arraysize(ret)));
  } else {
    Local<Value> ret = proxy->GetTarget();

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

static void PreviewEntries(const FunctionCallbackInfo<Value>& args) {
  if (!args[0]->IsObject())
    return;

  Environment* env = Environment::GetCurrent(args);
  bool is_key_value;
  Local<Array> entries;
  if (!args[0].As<Object>()->PreviewEntries(&is_key_value).ToLocal(&entries))
    return;
  // Fast path for WeakMap and WeakSet.
  if (args.Length() == 1)
    return args.GetReturnValue().Set(entries);

  Local<Value> ret[] = {
    entries,
    Boolean::New(env->isolate(), is_key_value)
  };
  return args.GetReturnValue().Set(
      Array::New(env->isolate(), ret, arraysize(ret)));
}

inline Local<Private> IndexToPrivateSymbol(Environment* env, uint32_t index) {
#define V(name, _) &Environment::name,
  static Local<Private> (Environment::*const methods[])() const = {
    PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V)
  };
#undef V
  CHECK_LT(index, arraysize(methods));
  return (env->*methods[index])();
}

static void GetHiddenValue(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);

  CHECK(args[0]->IsObject());
  CHECK(args[1]->IsUint32());

  Local<Object> obj = args[0].As<Object>();
  uint32_t index = args[1].As<Uint32>()->Value();
  Local<Private> private_symbol = IndexToPrivateSymbol(env, index);
  Local<Value> ret;
  if (obj->GetPrivate(env->context(), private_symbol).ToLocal(&ret))
    args.GetReturnValue().Set(ret);
}

static void SetHiddenValue(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);

  CHECK(args[0]->IsObject());
  CHECK(args[1]->IsUint32());

  Local<Object> obj = args[0].As<Object>();
  uint32_t index = args[1].As<Uint32>()->Value();
  Local<Private> private_symbol = IndexToPrivateSymbol(env, index);
  bool ret;
  if (obj->SetPrivate(env->context(), private_symbol, args[2]).To(&ret))
    args.GetReturnValue().Set(ret);
}

static void Sleep(const FunctionCallbackInfo<Value>& args) {
  CHECK(args[0]->IsUint32());
  uint32_t msec = args[0].As<Uint32>()->Value();
  uv_sleep(msec);
}

void ArrayBufferViewHasBuffer(const FunctionCallbackInfo<Value>& args) {
  CHECK(args[0]->IsArrayBufferView());
  args.GetReturnValue().Set(args[0].As<ArrayBufferView>()->HasBuffer());
}

WeakReference::WeakReference(Environment* env,
                             Local<Object> object,
                             Local<Object> target)
    : WeakReference(env, object, target, 0) {}

WeakReference::WeakReference(Environment* env,
                             Local<Object> object,
                             Local<Object> target,
                             uint64_t reference_count)
    : SnapshotableObject(env, object, type_int),
      reference_count_(reference_count) {
  MakeWeak();
  if (!target.IsEmpty()) {
    target_.Reset(env->isolate(), target);
    if (reference_count_ == 0) {
      target_.SetWeak();
    }
  }
}

bool WeakReference::PrepareForSerialization(Local<Context> context,
                                            v8::SnapshotCreator* creator) {
  if (target_.IsEmpty()) {
    target_index_ = 0;
    return true;
  }

  // Users can still hold strong references to target in addition to the
  // reference that we manage here, and they could expect that the referenced
  // object remains the same as long as that external strong reference
  // is alive. Since we have no way to know if there is any other reference
  // keeping the target alive, the best we can do to maintain consistency is to
  // simply save a reference to the target in the snapshot (effectively making
  // it strong) during serialization, and restore it during deserialization.
  // If there's no known counted reference from our side, we'll make the
  // reference here weak upon deserialization so that it can be GC'ed if users
  // do not hold additional references to it.
  Local<Object> target = target_.Get(context->GetIsolate());
  target_index_ = creator->AddData(context, target);
  DCHECK_NE(target_index_, 0);
  target_.Reset();
  return true;
}

InternalFieldInfoBase* WeakReference::Serialize(int index) {
  DCHECK_EQ(index, BaseObject::kEmbedderType);
  InternalFieldInfo* info =
      InternalFieldInfoBase::New<InternalFieldInfo>(type());
  info->target = target_index_;
  info->reference_count = reference_count_;
  return info;
}

void WeakReference::Deserialize(Local<Context> context,
                                Local<Object> holder,
                                int index,
                                InternalFieldInfoBase* info) {
  DCHECK_EQ(index, BaseObject::kEmbedderType);
  HandleScope scope(context->GetIsolate());

  InternalFieldInfo* weak_info = reinterpret_cast<InternalFieldInfo*>(info);
  Local<Object> target;
  if (weak_info->target != 0) {
    target = context->GetDataFromSnapshotOnce<Object>(weak_info->target)
                 .ToLocalChecked();
  }
  new WeakReference(Environment::GetCurrent(context),
                    holder,
                    target,
                    weak_info->reference_count);
}

void WeakReference::New(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(args.IsConstructCall());
  CHECK(args[0]->IsObject());
  new WeakReference(env, args.This(), args[0].As<Object>());
}

void WeakReference::Get(const FunctionCallbackInfo<Value>& args) {
  WeakReference* weak_ref = Unwrap<WeakReference>(args.Holder());
  Isolate* isolate = args.GetIsolate();
  if (!weak_ref->target_.IsEmpty())
    args.GetReturnValue().Set(weak_ref->target_.Get(isolate));
}

void WeakReference::IncRef(const FunctionCallbackInfo<Value>& args) {
  WeakReference* weak_ref = Unwrap<WeakReference>(args.Holder());
  weak_ref->reference_count_++;
  if (weak_ref->target_.IsEmpty()) return;
  if (weak_ref->reference_count_ == 1) weak_ref->target_.ClearWeak();
}

void WeakReference::DecRef(const FunctionCallbackInfo<Value>& args) {
  WeakReference* weak_ref = Unwrap<WeakReference>(args.Holder());
  CHECK_GE(weak_ref->reference_count_, 1);
  weak_ref->reference_count_--;
  if (weak_ref->target_.IsEmpty()) return;
  if (weak_ref->reference_count_ == 0) weak_ref->target_.SetWeak();
}

static void GuessHandleType(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  int fd;
  if (!args[0]->Int32Value(env->context()).To(&fd)) return;
  CHECK_GE(fd, 0);

  uv_handle_type t = uv_guess_handle(fd);
  const char* type = nullptr;

  switch (t) {
    case UV_TCP:
      type = "TCP";
      break;
    case UV_TTY:
      type = "TTY";
      break;
    case UV_UDP:
      type = "UDP";
      break;
    case UV_FILE:
      type = "FILE";
      break;
    case UV_NAMED_PIPE:
      type = "PIPE";
      break;
    case UV_UNKNOWN_HANDLE:
      type = "UNKNOWN";
      break;
    default:
      ABORT();
  }

  args.GetReturnValue().Set(OneByteString(env->isolate(), type));
}

static void ToUSVString(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK_GE(args.Length(), 2);
  CHECK(args[0]->IsString());
  CHECK(args[1]->IsNumber());

  TwoByteValue value(env->isolate(), args[0]);

  int64_t start = args[1]->IntegerValue(env->context()).FromJust();
  CHECK_GE(start, 0);

  for (size_t i = start; i < value.length(); i++) {
    char16_t c = value[i];
    if (!IsUnicodeSurrogate(c)) {
      continue;
    } else if (IsUnicodeSurrogateTrail(c) || i == value.length() - 1) {
      value[i] = kUnicodeReplacementCharacter;
    } else {
      char16_t d = value[i + 1];
      if (IsUnicodeTrail(d)) {
        i++;
      } else {
        value[i] = kUnicodeReplacementCharacter;
      }
    }
  }

  args.GetReturnValue().Set(
      String::NewFromTwoByte(env->isolate(),
                             *value,
                             v8::NewStringType::kNormal,
                             value.length()).ToLocalChecked());
}

void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
  registry->Register(GetHiddenValue);
  registry->Register(SetHiddenValue);
  registry->Register(GetPromiseDetails);
  registry->Register(GetProxyDetails);
  registry->Register(PreviewEntries);
  registry->Register(GetOwnNonIndexProperties);
  registry->Register(GetConstructorName);
  registry->Register(GetExternalValue);
  registry->Register(Sleep);
  registry->Register(ArrayBufferViewHasBuffer);
  registry->Register(WeakReference::New);
  registry->Register(WeakReference::Get);
  registry->Register(WeakReference::IncRef);
  registry->Register(WeakReference::DecRef);
  registry->Register(GuessHandleType);
  registry->Register(ToUSVString);
}

void Initialize(Local<Object> target,
                Local<Value> unused,
                Local<Context> context,
                void* priv) {
  Environment* env = Environment::GetCurrent(context);
  Isolate* isolate = env->isolate();

#define V(name, _)                                                            \
  target->Set(context,                                                        \
              FIXED_ONE_BYTE_STRING(env->isolate(), #name),                   \
              Integer::NewFromUnsigned(env->isolate(), index++)).Check();
  {
    uint32_t index = 0;
    PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V)
  }
#undef V

#define V(name)                                                               \
  target->Set(context,                                                        \
              FIXED_ONE_BYTE_STRING(env->isolate(), #name),                   \
              Integer::New(env->isolate(), Promise::PromiseState::name))      \
    .FromJust()
  V(kPending);
  V(kFulfilled);
  V(kRejected);
#undef V

  SetMethodNoSideEffect(context, target, "getHiddenValue", GetHiddenValue);
  SetMethod(context, target, "setHiddenValue", SetHiddenValue);
  SetMethodNoSideEffect(
      context, target, "getPromiseDetails", GetPromiseDetails);
  SetMethodNoSideEffect(context, target, "getProxyDetails", GetProxyDetails);
  SetMethodNoSideEffect(context, target, "previewEntries", PreviewEntries);
  SetMethodNoSideEffect(
      context, target, "getOwnNonIndexProperties", GetOwnNonIndexProperties);
  SetMethodNoSideEffect(
      context, target, "getConstructorName", GetConstructorName);
  SetMethodNoSideEffect(context, target, "getExternalValue", GetExternalValue);
  SetMethod(context, target, "sleep", Sleep);

  SetMethod(
      context, target, "arrayBufferViewHasBuffer", ArrayBufferViewHasBuffer);
  Local<Object> constants = Object::New(env->isolate());
  NODE_DEFINE_CONSTANT(constants, ALL_PROPERTIES);
  NODE_DEFINE_CONSTANT(constants, ONLY_WRITABLE);
  NODE_DEFINE_CONSTANT(constants, ONLY_ENUMERABLE);
  NODE_DEFINE_CONSTANT(constants, ONLY_CONFIGURABLE);
  NODE_DEFINE_CONSTANT(constants, SKIP_STRINGS);
  NODE_DEFINE_CONSTANT(constants, SKIP_SYMBOLS);
  target->Set(context,
              FIXED_ONE_BYTE_STRING(env->isolate(), "propertyFilter"),
              constants).Check();

  Local<String> should_abort_on_uncaught_toggle =
      FIXED_ONE_BYTE_STRING(env->isolate(), "shouldAbortOnUncaughtToggle");
  CHECK(target
            ->Set(context,
                  should_abort_on_uncaught_toggle,
                  env->should_abort_on_uncaught_toggle().GetJSArray())
            .FromJust());

  Local<FunctionTemplate> weak_ref =
      NewFunctionTemplate(isolate, WeakReference::New);
  weak_ref->InstanceTemplate()->SetInternalFieldCount(
      WeakReference::kInternalFieldCount);
  weak_ref->Inherit(BaseObject::GetConstructorTemplate(env));
  SetProtoMethod(isolate, weak_ref, "get", WeakReference::Get);
  SetProtoMethod(isolate, weak_ref, "incRef", WeakReference::IncRef);
  SetProtoMethod(isolate, weak_ref, "decRef", WeakReference::DecRef);
  SetConstructorFunction(context, target, "WeakReference", weak_ref);

  SetMethod(context, target, "guessHandleType", GuessHandleType);

  SetMethodNoSideEffect(context, target, "toUSVString", ToUSVString);
}

}  // namespace util
}  // namespace node

NODE_MODULE_CONTEXT_AWARE_INTERNAL(util, node::util::Initialize)
NODE_MODULE_EXTERNAL_REFERENCE(util, node::util::RegisterExternalReferences)


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "node_util.h"
2			#include "base_object-inl.h"
3			#include "node_errors.h"
4			#include "node_external_reference.h"
5			#include "util-inl.h"
6
7			namespace node {
8			namespace util {
9
10			using v8::ALL_PROPERTIES;
11			using v8::Array;
12			using v8::ArrayBufferView;
13			using v8::BigInt;
14			using v8::Boolean;
15			using v8::Context;
16			using v8::External;
17			using v8::FunctionCallbackInfo;
18			using v8::FunctionTemplate;
19			using v8::HandleScope;
20			using v8::IndexFilter;
21			using v8::Integer;
22			using v8::Isolate;
23			using v8::KeyCollectionMode;
24			using v8::Local;
25			using v8::Object;
26			using v8::ONLY_CONFIGURABLE;
27			using v8::ONLY_ENUMERABLE;
28			using v8::ONLY_WRITABLE;
29			using v8::Private;
30			using v8::Promise;
31			using v8::PropertyFilter;
32			using v8::Proxy;
33			using v8::SKIP_STRINGS;
34			using v8::SKIP_SYMBOLS;
35			using v8::String;
36			using v8::Uint32;
37			using v8::Value;
38
39			// Used in ToUSVString().
40			constexpr char16_t kUnicodeReplacementCharacter = 0xFFFD;
41
42			// If a UTF-16 character is a low/trailing surrogate.
43		3	CHAR_TEST(16, IsUnicodeTrail, (ch & 0xFC00) == 0xDC00)
44
45			// If a UTF-16 character is a surrogate.
46		32	CHAR_TEST(16, IsUnicodeSurrogate, (ch & 0xF800) == 0xD800)
47
48			// If a UTF-16 surrogate is a low/trailing one.
49		19	CHAR_TEST(16, IsUnicodeSurrogateTrail, (ch & 0x400) != 0)
50
51		144739	static void GetOwnNonIndexProperties(
52			const FunctionCallbackInfo<Value>& args) {
53		144739	Environment* env = Environment::GetCurrent(args);
54		144739	Local<Context> context = env->context();
55
56	✗✓	144739	CHECK(args[0]->IsObject());
57	✗✓	144739	CHECK(args[1]->IsUint32());
58
59	✓✗	289478	Local<Object> object = args[0].As<Object>();
60
61			Local<Array> properties;
62
63			PropertyFilter filter =
64		289478	static_cast<PropertyFilter>(args[1].As<Uint32>()->Value());
65
66		144739	if (!object->GetPropertyNames(
67			context, KeyCollectionMode::kOwnOnly,
68			filter,
69		144739	IndexFilter::kSkipIndices)
70	✓✓	144739	.ToLocal(&properties)) {
71		2	return;
72			}
73		289474	args.GetReturnValue().Set(properties);
74			}
75
76	✓✗	2263	static void GetConstructorName(
77			const FunctionCallbackInfo<Value>& args) {
78	✗✓	2263	CHECK(args[0]->IsObject());
79
80		4526	Local<Object> object = args[0].As<Object>();
81		2263	Local<String> name = object->GetConstructorName();
82
83		2263	args.GetReturnValue().Set(name);
84		2263	}
85
86	✓✗	44	static void GetExternalValue(
87			const FunctionCallbackInfo<Value>& args) {
88	✗✓	44	CHECK(args[0]->IsExternal());
89	✓✗	44	Isolate* isolate = args.GetIsolate();
90		88	Local<External> external = args[0].As<External>();
91
92		44	void* ptr = external->Value();
93		44	uint64_t value = reinterpret_cast<uint64_t>(ptr);
94		44	Local<BigInt> ret = BigInt::NewFromUnsigned(isolate, value);
95		44	args.GetReturnValue().Set(ret);
96		44	}
97
98	✓✗	1246	static void GetPromiseDetails(const FunctionCallbackInfo<Value>& args) {
99			// Return undefined if it's not a Promise.
100	✓✓	1246	if (!args[0]->IsPromise())
101		1	return;
102
103	✓✗	1245	auto isolate = args.GetIsolate();
104
105		2490	Local<Promise> promise = args[0].As<Promise>();
106
107		1245	int state = promise->State();
108	✓✓	3735	Local<Value> values[2] = { Integer::New(isolate, state) };
109		1245	size_t number_of_values = 1;
110	✓✓	1245	if (state != Promise::PromiseState::kPending)
111		1041	values[number_of_values++] = promise->Result();
112		1245	Local<Array> ret = Array::New(isolate, values, number_of_values);
113		2490	args.GetReturnValue().Set(ret);
114			}
115
116	✓✗	276453	static void GetProxyDetails(const FunctionCallbackInfo<Value>& args) {
117			// Return undefined if it's not a proxy.
118	✓✓	276453	if (!args[0]->IsProxy())
119		276337	return;
120
121		232	Local<Proxy> proxy = args[0].As<Proxy>();
122
123			// TODO(BridgeAR): Remove the length check as soon as we prohibit access to
124			// the util binding layer. It's accessed in the wild and `esm` would break in
125			// case the check is removed.
126	✓✓✓✓ ✓✓	231	if (args.Length() == 1 \|\| args[1]->IsTrue()) {
127			Local<Value> ret[] = {
128		46	proxy->GetTarget(),
129		46	proxy->GetHandler()
130		138	};
131
132		138	args.GetReturnValue().Set(
133			Array::New(args.GetIsolate(), ret, arraysize(ret)));
134			} else {
135		70	Local<Value> ret = proxy->GetTarget();
136
137		140	args.GetReturnValue().Set(ret);
138			}
139			}
140
141	✓✗	124	static void PreviewEntries(const FunctionCallbackInfo<Value>& args) {
142	✗✓	124	if (!args[0]->IsObject())
143			return;
144
145		124	Environment* env = Environment::GetCurrent(args);
146			bool is_key_value;
147			Local<Array> entries;
148	✗✓	372	if (!args[0].As<Object>()->PreviewEntries(&is_key_value).ToLocal(&entries))
149			return;
150			// Fast path for WeakMap and WeakSet.
151	✓✓	124	if (args.Length() == 1)
152		16	return args.GetReturnValue().Set(entries);
153
154			Local<Value> ret[] = {
155			entries,
156			Boolean::New(env->isolate(), is_key_value)
157		232	};
158		116	return args.GetReturnValue().Set(
159		116	Array::New(env->isolate(), ret, arraysize(ret)));
160			}
161
162		6321	inline Local<Private> IndexToPrivateSymbol(Environment* env, uint32_t index) {
163			#define V(name, _) &Environment::name,
164			static Local<Private> (Environment::*const methods[])() const = {
165			PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V)
166			};
167			#undef V
168	✗✓	6321	CHECK_LT(index, arraysize(methods));
169	✗✓	6321	return (env->*methods[index])();
170			}
171
172		970	static void GetHiddenValue(const FunctionCallbackInfo<Value>& args) {
173		970	Environment* env = Environment::GetCurrent(args);
174
175	✗✓	970	CHECK(args[0]->IsObject());
176	✗✓	970	CHECK(args[1]->IsUint32());
177
178	✓✗	1940	Local<Object> obj = args[0].As<Object>();
179		1940	uint32_t index = args[1].As<Uint32>()->Value();
180		970	Local<Private> private_symbol = IndexToPrivateSymbol(env, index);
181			Local<Value> ret;
182	✓✗	1940	if (obj->GetPrivate(env->context(), private_symbol).ToLocal(&ret))
183		1940	args.GetReturnValue().Set(ret);
184		970	}
185
186		5351	static void SetHiddenValue(const FunctionCallbackInfo<Value>& args) {
187		5351	Environment* env = Environment::GetCurrent(args);
188
189	✗✓	5351	CHECK(args[0]->IsObject());
190	✗✓	5351	CHECK(args[1]->IsUint32());
191
192	✓✗	10702	Local<Object> obj = args[0].As<Object>();
193		10702	uint32_t index = args[1].As<Uint32>()->Value();
194		5351	Local<Private> private_symbol = IndexToPrivateSymbol(env, index);
195			bool ret;
196	✓✗✓✗	16053	if (obj->SetPrivate(env->context(), private_symbol, args[2]).To(&ret))
197	✓✗	10702	args.GetReturnValue().Set(ret);
198		5351	}
199
200	✓✗	10	static void Sleep(const FunctionCallbackInfo<Value>& args) {
201	✗✓	10	CHECK(args[0]->IsUint32());
202		20	uint32_t msec = args[0].As<Uint32>()->Value();
203		10	uv_sleep(msec);
204		10	}
205
206	✓✗	56	void ArrayBufferViewHasBuffer(const FunctionCallbackInfo<Value>& args) {
207	✗✓	56	CHECK(args[0]->IsArrayBufferView());
208	✓✗✓✓	168	args.GetReturnValue().Set(args[0].As<ArrayBufferView>()->HasBuffer());
209		56	}
210
211		32459	WeakReference::WeakReference(Environment* env,
212			Local<Object> object,
213		32459	Local<Object> target)
214		32459	: WeakReference(env, object, target, 0) {}
215
216		32459	WeakReference::WeakReference(Environment* env,
217			Local<Object> object,
218			Local<Object> target,
219		32459	uint64_t reference_count)
220			: SnapshotableObject(env, object, type_int),
221		32459	reference_count_(reference_count) {
222		32459	MakeWeak();
223	✓✗	32459	if (!target.IsEmpty()) {
224		32459	target_.Reset(env->isolate(), target);
225	✓✗	32459	if (reference_count_ == 0) {
226		32459	target_.SetWeak();
227			}
228			}
229		32459	}
230
231			bool WeakReference::PrepareForSerialization(Local<Context> context,
232			v8::SnapshotCreator* creator) {
233			if (target_.IsEmpty()) {
234			target_index_ = 0;
235			return true;
236			}
237
238			// Users can still hold strong references to target in addition to the
239			// reference that we manage here, and they could expect that the referenced
240			// object remains the same as long as that external strong reference
241			// is alive. Since we have no way to know if there is any other reference
242			// keeping the target alive, the best we can do to maintain consistency is to
243			// simply save a reference to the target in the snapshot (effectively making
244			// it strong) during serialization, and restore it during deserialization.
245			// If there's no known counted reference from our side, we'll make the
246			// reference here weak upon deserialization so that it can be GC'ed if users
247			// do not hold additional references to it.
248			Local<Object> target = target_.Get(context->GetIsolate());
249			target_index_ = creator->AddData(context, target);
250			DCHECK_NE(target_index_, 0);
251			target_.Reset();
252			return true;
253			}
254
255			InternalFieldInfoBase* WeakReference::Serialize(int index) {
256			DCHECK_EQ(index, BaseObject::kEmbedderType);
257			InternalFieldInfo* info =
258			InternalFieldInfoBase::New<InternalFieldInfo>(type());
259			info->target = target_index_;
260			info->reference_count = reference_count_;
261			return info;
262			}
263
264			void WeakReference::Deserialize(Local<Context> context,
265			Local<Object> holder,
266			int index,
267			InternalFieldInfoBase* info) {
268			DCHECK_EQ(index, BaseObject::kEmbedderType);
269			HandleScope scope(context->GetIsolate());
270
271			InternalFieldInfo* weak_info = reinterpret_cast<InternalFieldInfo*>(info);
272			Local<Object> target;
273			if (weak_info->target != 0) {
274			target = context->GetDataFromSnapshotOnce<Object>(weak_info->target)
275			.ToLocalChecked();
276			}
277			new WeakReference(Environment::GetCurrent(context),
278			holder,
279			target,
280			weak_info->reference_count);
281			}
282
283		32459	void WeakReference::New(const FunctionCallbackInfo<Value>& args) {
284		32459	Environment* env = Environment::GetCurrent(args);
285	✗✓	32459	CHECK(args.IsConstructCall());
286	✗✓	32459	CHECK(args[0]->IsObject());
287	✓✗	97377	new WeakReference(env, args.This(), args[0].As<Object>());
288		32459	}
289
290		10843	void WeakReference::Get(const FunctionCallbackInfo<Value>& args) {
291		10843	WeakReference* weak_ref = Unwrap<WeakReference>(args.Holder());
292		10843	Isolate* isolate = args.GetIsolate();
293	✓✓	10843	if (!weak_ref->target_.IsEmpty())
294	✗✓	21684	args.GetReturnValue().Set(weak_ref->target_.Get(isolate));
295		10843	}
296
297		5426	void WeakReference::IncRef(const FunctionCallbackInfo<Value>& args) {
298		5426	WeakReference* weak_ref = Unwrap<WeakReference>(args.Holder());
299		5426	weak_ref->reference_count_++;
300	✗✓	5426	if (weak_ref->target_.IsEmpty()) return;
301	✓✓	5426	if (weak_ref->reference_count_ == 1) weak_ref->target_.ClearWeak();
302			}
303
304		5411	void WeakReference::DecRef(const FunctionCallbackInfo<Value>& args) {
305		5411	WeakReference* weak_ref = Unwrap<WeakReference>(args.Holder());
306	✗✓	5411	CHECK_GE(weak_ref->reference_count_, 1);
307		5411	weak_ref->reference_count_--;
308	✗✓	5411	if (weak_ref->target_.IsEmpty()) return;
309	✓✓	5411	if (weak_ref->reference_count_ == 0) weak_ref->target_.SetWeak();
310			}
311
312		8409	static void GuessHandleType(const FunctionCallbackInfo<Value>& args) {
313		8409	Environment* env = Environment::GetCurrent(args);
314			int fd;
315	✗✓	16818	if (!args[0]->Int32Value(env->context()).To(&fd)) return;
316	✗✓	8409	CHECK_GE(fd, 0);
317
318		8409	uv_handle_type t = uv_guess_handle(fd);
319		8409	const char* type = nullptr;
320
321	✓✓✓✓ ✓✓✗	8409	switch (t) {
322		4	case UV_TCP:
323		4	type = "TCP";
324		4	break;
325		60	case UV_TTY:
326		60	type = "TTY";
327		60	break;
328		6	case UV_UDP:
329		6	type = "UDP";
330		6	break;
331		4869	case UV_FILE:
332		4869	type = "FILE";
333		4869	break;
334		3465	case UV_NAMED_PIPE:
335		3465	type = "PIPE";
336		3465	break;
337		5	case UV_UNKNOWN_HANDLE:
338		5	type = "UNKNOWN";
339		5	break;
340			default:
341			ABORT();
342			}
343
344		16818	args.GetReturnValue().Set(OneByteString(env->isolate(), type));
345			}
346
347		17	static void ToUSVString(const FunctionCallbackInfo<Value>& args) {
348		17	Environment* env = Environment::GetCurrent(args);
349	✗✓	17	CHECK_GE(args.Length(), 2);
350	✗✓	34	CHECK(args[0]->IsString());
351	✗✓	17	CHECK(args[1]->IsNumber());
352
353		17	TwoByteValue value(env->isolate(), args[0]);
354
355		17	int64_t start = args[1]->IntegerValue(env->context()).FromJust();
356	✗✓	17	CHECK_GE(start, 0);
357
358	✓✓	49	for (size_t i = start; i < value.length(); i++) {
359		32	char16_t c = value[i];
360	✓✓	32	if (!IsUnicodeSurrogate(c)) {
361		13	continue;
362	✓✓✓✓ ✓✓	19	} else if (IsUnicodeSurrogateTrail(c) \|\| i == value.length() - 1) {
363		16	value[i] = kUnicodeReplacementCharacter;
364			} else {
365		3	char16_t d = value[i + 1];
366	✗✓	3	if (IsUnicodeTrail(d)) {
367			i++;
368			} else {
369		3	value[i] = kUnicodeReplacementCharacter;
370			}
371			}
372			}
373
374		51	args.GetReturnValue().Set(
375		17	String::NewFromTwoByte(env->isolate(),
376		17	*value,
377			v8::NewStringType::kNormal,
378		17	value.length()).ToLocalChecked());
379		17	}
380
381		5527	void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
382		5527	registry->Register(GetHiddenValue);
383		5527	registry->Register(SetHiddenValue);
384		5527	registry->Register(GetPromiseDetails);
385		5527	registry->Register(GetProxyDetails);
386		5527	registry->Register(PreviewEntries);
387		5527	registry->Register(GetOwnNonIndexProperties);
388		5527	registry->Register(GetConstructorName);
389		5527	registry->Register(GetExternalValue);
390		5527	registry->Register(Sleep);
391		5527	registry->Register(ArrayBufferViewHasBuffer);
392		5527	registry->Register(WeakReference::New);
393		5527	registry->Register(WeakReference::Get);
394		5527	registry->Register(WeakReference::IncRef);
395		5527	registry->Register(WeakReference::DecRef);
396		5527	registry->Register(GuessHandleType);
397		5527	registry->Register(ToUSVString);
398		5527	}
399
400		789	void Initialize(Local<Object> target,
401			Local<Value> unused,
402			Local<Context> context,
403			void* priv) {
404		789	Environment* env = Environment::GetCurrent(context);
405		789	Isolate* isolate = env->isolate();
406
407			#define V(name, _) \
408			target->Set(context, \
409			FIXED_ONE_BYTE_STRING(env->isolate(), #name), \
410			Integer::NewFromUnsigned(env->isolate(), index++)).Check();
411			{
412		789	uint32_t index = 0;
413		22092	PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V)
414			}
415			#undef V
416
417			#define V(name) \
418			target->Set(context, \
419			FIXED_ONE_BYTE_STRING(env->isolate(), #name), \
420			Integer::New(env->isolate(), Promise::PromiseState::name)) \
421			.FromJust()
422		3156	V(kPending);
423		3156	V(kFulfilled);
424		2367	V(kRejected);
425			#undef V
426
427		789	SetMethodNoSideEffect(context, target, "getHiddenValue", GetHiddenValue);
428		789	SetMethod(context, target, "setHiddenValue", SetHiddenValue);
429		789	SetMethodNoSideEffect(
430			context, target, "getPromiseDetails", GetPromiseDetails);
431		789	SetMethodNoSideEffect(context, target, "getProxyDetails", GetProxyDetails);
432		789	SetMethodNoSideEffect(context, target, "previewEntries", PreviewEntries);
433		789	SetMethodNoSideEffect(
434			context, target, "getOwnNonIndexProperties", GetOwnNonIndexProperties);
435		789	SetMethodNoSideEffect(
436			context, target, "getConstructorName", GetConstructorName);
437		789	SetMethodNoSideEffect(context, target, "getExternalValue", GetExternalValue);
438		789	SetMethod(context, target, "sleep", Sleep);
439
440		789	SetMethod(
441			context, target, "arrayBufferViewHasBuffer", ArrayBufferViewHasBuffer);
442		789	Local<Object> constants = Object::New(env->isolate());
443		2367	NODE_DEFINE_CONSTANT(constants, ALL_PROPERTIES);
444		2367	NODE_DEFINE_CONSTANT(constants, ONLY_WRITABLE);
445		2367	NODE_DEFINE_CONSTANT(constants, ONLY_ENUMERABLE);
446		2367	NODE_DEFINE_CONSTANT(constants, ONLY_CONFIGURABLE);
447		2367	NODE_DEFINE_CONSTANT(constants, SKIP_STRINGS);
448		2367	NODE_DEFINE_CONSTANT(constants, SKIP_SYMBOLS);
449		789	target->Set(context,
450			FIXED_ONE_BYTE_STRING(env->isolate(), "propertyFilter"),
451		1578	constants).Check();
452
453			Local<String> should_abort_on_uncaught_toggle =
454		789	FIXED_ONE_BYTE_STRING(env->isolate(), "shouldAbortOnUncaughtToggle");
455	✗✓	2367	CHECK(target
456			->Set(context,
457			should_abort_on_uncaught_toggle,
458			env->should_abort_on_uncaught_toggle().GetJSArray())
459			.FromJust());
460
461			Local<FunctionTemplate> weak_ref =
462		789	NewFunctionTemplate(isolate, WeakReference::New);
463		1578	weak_ref->InstanceTemplate()->SetInternalFieldCount(
464			WeakReference::kInternalFieldCount);
465		789	weak_ref->Inherit(BaseObject::GetConstructorTemplate(env));
466		789	SetProtoMethod(isolate, weak_ref, "get", WeakReference::Get);
467		789	SetProtoMethod(isolate, weak_ref, "incRef", WeakReference::IncRef);
468		789	SetProtoMethod(isolate, weak_ref, "decRef", WeakReference::DecRef);
469		789	SetConstructorFunction(context, target, "WeakReference", weak_ref);
470
471		789	SetMethod(context, target, "guessHandleType", GuessHandleType);
472
473		789	SetMethodNoSideEffect(context, target, "toUSVString", ToUSVString);
474		789	}
475
476			} // namespace util
477			} // namespace node
478
479		5597	NODE_MODULE_CONTEXT_AWARE_INTERNAL(util, node::util::Initialize)
480		5527	NODE_MODULE_EXTERNAL_REFERENCE(util, node::util::RegisterExternalReferences)