GCC Code Coverage Report
Directory: ../ Exec Total Coverage
File: /home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/base_object-inl.h Lines: 161 174 92.5 %
Date: 2021-04-22 04:13:51 Branches: 134 228 58.8 %

Line Branch Exec Source
1
// Copyright Joyent, Inc. and other Node contributors.
2
//
3
// Permission is hereby granted, free of charge, to any person obtaining a
4
// copy of this software and associated documentation files (the
5
// "Software"), to deal in the Software without restriction, including
6
// without limitation the rights to use, copy, modify, merge, publish,
7
// distribute, sublicense, and/or sell copies of the Software, and to permit
8
// persons to whom the Software is furnished to do so, subject to the
9
// following conditions:
10
//
11
// The above copyright notice and this permission notice shall be included
12
// in all copies or substantial portions of the Software.
13
//
14
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20
// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22
#ifndef SRC_BASE_OBJECT_INL_H_
23
#define SRC_BASE_OBJECT_INL_H_
24
25
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
26
27
#include "base_object.h"
28
#include "env-inl.h"
29
#include "util.h"
30
31
#include "v8.h"
32
33
namespace node {
34
35
351873
BaseObject::BaseObject(Environment* env, v8::Local<v8::Object> object)
36
703744
    : persistent_handle_(env->isolate(), object), env_(env) {
37
351871
  CHECK_EQ(false, object.IsEmpty());
38
351871
  CHECK_GT(object->InternalFieldCount(), 0);
39
351871
  object->SetAlignedPointerInInternalField(
40
      BaseObject::kSlot,
41
351871
      static_cast<void*>(this));
42
351870
  env->AddCleanupHook(DeleteMe, static_cast<void*>(this));
43
351873
  env->modify_base_object_count(1);
44
351873
}
45
46

1033381
BaseObject::~BaseObject() {
47
344463
  env()->modify_base_object_count(-1);
48
344462
  env()->RemoveCleanupHook(DeleteMe, static_cast<void*>(this));
49
50
344464
  if (UNLIKELY(has_pointer_data())) {
51
161228
    PointerData* metadata = pointer_data();
52
161226
    CHECK_EQ(metadata->strong_ptr_count, 0);
53
161226
    metadata->self = nullptr;
54
161226
    if (metadata->weak_ptr_count == 0)
55
161206
      delete metadata;
56
  }
57
58
688930
  if (persistent_handle_.IsEmpty()) {
59
    // This most likely happened because the weak callback below cleared it.
60
73820
    return;
61
  }
62
63
  {
64
541281
    v8::HandleScope handle_scope(env()->isolate());
65
541274
    object()->SetAlignedPointerInInternalField(BaseObject::kSlot, nullptr);
66
  }
67
344461
}
68
69
156847
void BaseObject::Detach() {
70
156847
  CHECK_GT(pointer_data()->strong_ptr_count, 0);
71
156839
  pointer_data()->is_detached = true;
72
156834
}
73
74
704752
v8::Global<v8::Object>& BaseObject::persistent() {
75
704752
  return persistent_handle_;
76
}
77
78
79
2945429
v8::Local<v8::Object> BaseObject::object() const {
80
2945429
  return PersistentToLocal::Default(env()->isolate(), persistent_handle_);
81
}
82
83
94573
v8::Local<v8::Object> BaseObject::object(v8::Isolate* isolate) const {
84
94573
  v8::Local<v8::Object> handle = object();
85
86
  DCHECK_EQ(handle->GetCreationContext().ToLocalChecked()->GetIsolate(),
87
            isolate);
88
  DCHECK_EQ(env()->isolate(), isolate);
89
90
94539
  return handle;
91
}
92
93
12680357
Environment* BaseObject::env() const {
94
12680357
  return env_;
95
}
96
97
5117991
BaseObject* BaseObject::FromJSObject(v8::Local<v8::Value> value) {
98
5117991
  v8::Local<v8::Object> obj = value.As<v8::Object>();
99
  DCHECK_GE(obj->InternalFieldCount(), BaseObject::kSlot);
100
  return static_cast<BaseObject*>(
101
10235985
      obj->GetAlignedPointerFromInternalField(BaseObject::kSlot));
102
}
103
104
105
template <typename T>
106
812389
T* BaseObject::FromJSObject(v8::Local<v8::Value> object) {
107
812389
  return static_cast<T*>(FromJSObject(object));
108
}
109
110
111
176624
void BaseObject::MakeWeak() {
112
176624
  if (has_pointer_data()) {
113
41579
    pointer_data()->wants_weak_jsobj = true;
114
41579
    if (pointer_data()->strong_ptr_count > 0) return;
115
  }
116
117
353246
  persistent_handle_.SetWeak(
118
      this,
119
324257
      [](const v8::WeakCallbackInfo<BaseObject>& data) {
120
73817
        BaseObject* obj = data.GetParameter();
121
        // Clear the persistent handle so that ~BaseObject() doesn't attempt
122
        // to mess with internal fields, since the JS object may have
123
        // transitioned into an invalid state.
124
        // Refs: https://github.com/nodejs/node/issues/18897
125
73817
        obj->persistent_handle_.Reset();
126

73817
        CHECK_IMPLIES(obj->has_pointer_data(),
127
                      obj->pointer_data()->strong_ptr_count == 0);
128
73817
        obj->OnGCCollect();
129
324257
      }, v8::WeakCallbackType::kParameter);
130
}
131
132
73815
void BaseObject::OnGCCollect() {
133
73815
  delete this;
134
73815
}
135
136
2495
void BaseObject::ClearWeak() {
137
2495
  if (has_pointer_data())
138
    pointer_data()->wants_weak_jsobj = false;
139
140
2495
  persistent_handle_.ClearWeak();
141
2495
}
142
143
bool BaseObject::IsWeakOrDetached() const {
144
  if (persistent_handle_.IsWeak()) return true;
145
146
  if (!has_pointer_data()) return false;
147
  const PointerData* pd = const_cast<BaseObject*>(this)->pointer_data();
148
  return pd->wants_weak_jsobj || pd->is_detached;
149
}
150
151
v8::Local<v8::FunctionTemplate>
152
17291
BaseObject::MakeLazilyInitializedJSTemplate(Environment* env) {
153
63531
  auto constructor = [](const v8::FunctionCallbackInfo<v8::Value>& args) {
154
    DCHECK(args.IsConstructCall());
155
    DCHECK_GT(args.This()->InternalFieldCount(), 0);
156
46240
    args.This()->SetAlignedPointerInInternalField(BaseObject::kSlot, nullptr);
157
63531
  };
158
159
17291
  v8::Local<v8::FunctionTemplate> t = env->NewFunctionTemplate(constructor);
160
34582
  t->Inherit(BaseObject::GetConstructorTemplate(env));
161
51873
  t->InstanceTemplate()->SetInternalFieldCount(
162
17291
      BaseObject::kInternalFieldCount);
163
17291
  return t;
164
}
165
166
template <int Field>
167
void BaseObject::InternalFieldGet(
168
    v8::Local<v8::String> property,
169
    const v8::PropertyCallbackInfo<v8::Value>& info) {
170
  info.GetReturnValue().Set(info.This()->GetInternalField(Field));
171
}
172
173
template <int Field, bool (v8::Value::* typecheck)() const>
174
97316
void BaseObject::InternalFieldSet(v8::Local<v8::String> property,
175
                                  v8::Local<v8::Value> value,
176
                                  const v8::PropertyCallbackInfo<void>& info) {
177
  // This could be e.g. value->IsFunction().
178
97316
  CHECK(((*value)->*typecheck)());
179
194632
  info.This()->SetInternalField(Field, value);
180
97316
}
181
182
6738872
bool BaseObject::has_pointer_data() const {
183
6738872
  return pointer_data_ != nullptr;
184
}
185
186
2673931
BaseObject::PointerData* BaseObject::pointer_data() {
187
2673931
  if (!has_pointer_data()) {
188
162210
    PointerData* metadata = new PointerData();
189
324378
    metadata->wants_weak_jsobj = persistent_handle_.IsWeak();
190
162189
    metadata->self = this;
191
162189
    pointer_data_ = metadata;
192
  }
193
2673866
  CHECK(has_pointer_data());
194
2673700
  return pointer_data_;
195
}
196
197
695238
void BaseObject::decrease_refcount() {
198
695238
  CHECK(has_pointer_data());
199
695231
  PointerData* metadata = pointer_data();
200
695176
  CHECK_GT(metadata->strong_ptr_count, 0);
201
695176
  unsigned int new_refcount = --metadata->strong_ptr_count;
202
695176
  if (new_refcount == 0) {
203
226880
    if (metadata->is_detached) {
204
155770
      delete this;
205

112688
    } else if (metadata->wants_weak_jsobj && !persistent_handle_.IsEmpty()) {
206
41578
      MakeWeak();
207
    }
208
  }
209
695183
}
210
211
696186
void BaseObject::increase_refcount() {
212
696186
  unsigned int prev_refcount = pointer_data()->strong_ptr_count++;
213

923939
  if (prev_refcount == 0 && !persistent_handle_.IsEmpty())
214
227726
    persistent_handle_.ClearWeak();
215
696241
}
216
217
template <typename T, bool kIsWeak>
218
BaseObject::PointerData*
219
1842147
BaseObjectPtrImpl<T, kIsWeak>::pointer_data() const {
220
  if (kIsWeak) {
221
1145813
    return data_.pointer_data;
222
  }
223







696334
  if (get_base_object() == nullptr) {
224
    return nullptr;
225
  }
226
696332
  return get_base_object()->pointer_data();
227
}
228
229
template <typename T, bool kIsWeak>
230
9350970
BaseObject* BaseObjectPtrImpl<T, kIsWeak>::get_base_object() const {
231
  if (kIsWeak) {
232
518086
    if (pointer_data() == nullptr) {
233
4
      return nullptr;
234
    }
235
518082
    return pointer_data()->self;
236
  }
237
8832884
  return data_.target;
238
}
239
240
template <typename T, bool kIsWeak>
241
2075452
BaseObjectPtrImpl<T, kIsWeak>::~BaseObjectPtrImpl() {
242
  if (kIsWeak) {
243

97846
    if (pointer_data() != nullptr &&
244

60707
        --pointer_data()->weak_ptr_count == 0 &&
245
11784
        pointer_data()->self == nullptr) {
246
20
      delete pointer_data();
247
    }
248







2050988
  } else if (get() != nullptr) {
249
695287
    get()->decrease_refcount();
250
  }
251
2075460
}
252
253
template <typename T, bool kIsWeak>
254
1624942
BaseObjectPtrImpl<T, kIsWeak>::BaseObjectPtrImpl() {
255
1624942
  data_.target = nullptr;
256
1624942
}
257
258
template <typename T, bool kIsWeak>
259
1051492
BaseObjectPtrImpl<T, kIsWeak>::BaseObjectPtrImpl(T* target)
260
1051492
  : BaseObjectPtrImpl() {
261







1051495
  if (target == nullptr) return;
262
  if (kIsWeak) {
263
24459
    data_.pointer_data = target->pointer_data();
264
24459
    CHECK_NOT_NULL(pointer_data());
265
24459
    pointer_data()->weak_ptr_count++;
266
  } else {
267
696335
    data_.target = target;
268







696335
    CHECK_NOT_NULL(pointer_data());
269
696321
    get()->increase_refcount();
270
  }
271
}
272
273
template <typename T, bool kIsWeak>
274
template <typename U, bool kW>
275
21787
BaseObjectPtrImpl<T, kIsWeak>::BaseObjectPtrImpl(
276
    const BaseObjectPtrImpl<U, kW>& other)
277
21787
  : BaseObjectPtrImpl(other.get()) {}
278
279
template <typename T, bool kIsWeak>
280
439058
BaseObjectPtrImpl<T, kIsWeak>::BaseObjectPtrImpl(const BaseObjectPtrImpl& other)
281
439058
  : BaseObjectPtrImpl(other.get()) {}
282
283
template <typename T, bool kIsWeak>
284
template <typename U, bool kW>
285
4
BaseObjectPtrImpl<T, kIsWeak>& BaseObjectPtrImpl<T, kIsWeak>::operator=(
286
    const BaseObjectPtrImpl<U, kW>& other) {
287

4
  if (other.get() == get()) return *this;
288
4
  this->~BaseObjectPtrImpl();
289

4
  return *new (this) BaseObjectPtrImpl(other);
290
}
291
292
template <typename T, bool kIsWeak>
293
BaseObjectPtrImpl<T, kIsWeak>& BaseObjectPtrImpl<T, kIsWeak>::operator=(
294
    const BaseObjectPtrImpl& other) {
295
  if (other.get() == get()) return *this;
296
  this->~BaseObjectPtrImpl();
297
  return *new (this) BaseObjectPtrImpl(other);
298
}
299
300
template <typename T, bool kIsWeak>
301
451694
BaseObjectPtrImpl<T, kIsWeak>::BaseObjectPtrImpl(BaseObjectPtrImpl&& other)
302
451694
  : data_(other.data_) {
303
  if (kIsWeak)
304
2
    other.data_.target = nullptr;
305
  else
306
451692
    other.data_.pointer_data = nullptr;
307
451694
}
308
309
template <typename T, bool kIsWeak>
310
212559
BaseObjectPtrImpl<T, kIsWeak>& BaseObjectPtrImpl<T, kIsWeak>::operator=(
311
    BaseObjectPtrImpl&& other) {
312



212559
  if (&other == this) return *this;
313
212559
  this->~BaseObjectPtrImpl();
314



212559
  return *new (this) BaseObjectPtrImpl(std::move(other));
315
}
316
317
template <typename T, bool kIsWeak>
318
153705
void BaseObjectPtrImpl<T, kIsWeak>::reset(T* ptr) {
319
153705
  *this = BaseObjectPtrImpl(ptr);
320
153705
}
321
322
template <typename T, bool kIsWeak>
323
7958500
T* BaseObjectPtrImpl<T, kIsWeak>::get() const {
324
7958500
  return static_cast<T*>(get_base_object());
325
}
326
327
template <typename T, bool kIsWeak>
328
T& BaseObjectPtrImpl<T, kIsWeak>::operator*() const {
329
  return *get();
330
}
331
332
template <typename T, bool kIsWeak>
333
2401270
T* BaseObjectPtrImpl<T, kIsWeak>::operator->() const {
334
2401270
  return get();
335
}
336
337
template <typename T, bool kIsWeak>
338
729883
BaseObjectPtrImpl<T, kIsWeak>::operator bool() const {
339
729883
  return get() != nullptr;
340
}
341
342
template <typename T, bool kIsWeak>
343
template <typename U, bool kW>
344
10723
bool BaseObjectPtrImpl<T, kIsWeak>::operator ==(
345
    const BaseObjectPtrImpl<U, kW>& other) const {
346
10723
  return get() == other.get();
347
}
348
349
template <typename T, bool kIsWeak>
350
template <typename U, bool kW>
351
bool BaseObjectPtrImpl<T, kIsWeak>::operator !=(
352
    const BaseObjectPtrImpl<U, kW>& other) const {
353
  return get() != other.get();
354
}
355
356
template <typename T, typename... Args>
357
12121
BaseObjectPtr<T> MakeBaseObject(Args&&... args) {
358
12121
  return BaseObjectPtr<T>(new T(std::forward<Args>(args)...));
359
}
360
361
template <typename T, typename... Args>
362
12051
BaseObjectPtr<T> MakeDetachedBaseObject(Args&&... args) {
363
12051
  BaseObjectPtr<T> target = MakeBaseObject<T>(std::forward<Args>(args)...);
364
12051
  target->Detach();
365
12051
  return target;
366
}
367
368
}  // namespace node
369
370
#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
371
372
#endif  // SRC_BASE_OBJECT_INL_H_