GCC Code Coverage Report
Directory: ../ Exec Total Coverage
File: /home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/api/callback.cc Lines: 121 133 91.0 %
Date: 2020-07-19 22:14:24 Branches: 76 92 82.6 %

Line Branch Exec Source
1
#include "node.h"
2
#include "async_wrap-inl.h"
3
#include "env-inl.h"
4
#include "v8.h"
5
6
namespace node {
7
8
using v8::Context;
9
using v8::EscapableHandleScope;
10
using v8::Function;
11
using v8::HandleScope;
12
using v8::Isolate;
13
using v8::Local;
14
using v8::MaybeLocal;
15
using v8::MicrotasksScope;
16
using v8::Object;
17
using v8::String;
18
using v8::Value;
19
20
647
CallbackScope::CallbackScope(Isolate* isolate,
21
                             Local<Object> object,
22
647
                             async_context asyncContext)
23
647
  : private_(new InternalCallbackScope(Environment::GetCurrent(isolate),
24
                                       object,
25
647
                                       asyncContext)),
26
1294
    try_catch_(isolate) {
27
647
  try_catch_.SetVerbose(true);
28
647
}
29
30
1292
CallbackScope::~CallbackScope() {
31
646
  if (try_catch_.HasCaught())
32
1
    private_->MarkAsFailed();
33
646
  delete private_;
34
646
}
35
36
155376
InternalCallbackScope::InternalCallbackScope(AsyncWrap* async_wrap, int flags)
37
    : InternalCallbackScope(async_wrap->env(),
38
                            async_wrap->object(),
39
155376
                            { async_wrap->get_async_id(),
40
155376
                              async_wrap->get_trigger_async_id() },
41
310752
                            flags) {}
42
43
870147
InternalCallbackScope::InternalCallbackScope(Environment* env,
44
                                             Local<Object> object,
45
                                             const async_context& asyncContext,
46
870147
                                             int flags)
47
  : env_(env),
48
    async_context_(asyncContext),
49
    object_(object),
50
870147
    skip_hooks_(flags & kSkipAsyncHooks),
51
1740294
    skip_task_queues_(flags & kSkipTaskQueues) {
52
870147
  CHECK_NOT_NULL(env);
53
870147
  env->PushAsyncCallbackScope();
54
55
870216
  if (!env->can_call_into_js()) {
56
866
    failed_ = true;
57
866
    return;
58
  }
59
60
1738725
  HandleScope handle_scope(env->isolate());
61
  // If you hit this assertion, you forgot to enter the v8::Context first.
62
869356
  CHECK_EQ(Environment::GetCurrent(env->isolate()), env);
63
64
869367
  env->async_hooks()->push_async_context(
65
869367
    async_context_.async_id, async_context_.trigger_async_id, object);
66
67
869362
  pushed_ids_ = true;
68
69

869362
  if (asyncContext.async_id != 0 && !skip_hooks_) {
70
    // No need to check a return value because the application will exit if
71
    // an exception occurs.
72
156016
    AsyncWrap::EmitBefore(env, asyncContext.async_id);
73
  }
74
}
75
76
1739498
InternalCallbackScope::~InternalCallbackScope() {
77
869762
  Close();
78
869741
  env_->PopAsyncCallbackScope();
79
869736
}
80
81
1566848
void InternalCallbackScope::Close() {
82
2646822
  if (closed_) return;
83
869854
  closed_ = true;
84
85
869854
  if (!env_->can_call_into_js()) return;
86
1555387
  auto perform_stopping_check = [&]() {
87
1555401
    if (env_->is_stopping()) {
88
14
      MarkAsFailed();
89
14
      env_->async_hooks()->clear_async_id_stack();
90
    }
91
2424322
  };
92
868935
  perform_stopping_check();
93
94

868931
  if (!failed_ && async_context_.async_id != 0 && !skip_hooks_) {
95
156004
    AsyncWrap::EmitAfter(env_, async_context_.async_id);
96
  }
97
98
868932
  if (pushed_ids_)
99
868932
    env_->async_hooks()->pop_async_context(async_context_.async_id);
100
101
868931
  if (failed_) return;
102
103

868278
  if (env_->async_callback_scope_depth() > 1 || skip_task_queues_) {
104
182125
    return;
105
  }
106
107
686153
  TickInfo* tick_info = env_->tick_info();
108
109
686152
  if (!env_->can_call_into_js()) return;
110
111
1858960
  auto weakref_cleanup = OnScopeLeave([&]() { env_->RunWeakRefCleanup(); });
112
113
686151
  if (!tick_info->has_tick_scheduled()) {
114
199728
    MicrotasksScope::PerformCheckpoint(env_->isolate());
115
116
199708
    perform_stopping_check();
117
  }
118
119
  // Make sure the stack unwound properly. If there are nested MakeCallback's
120
  // then it should return early and not reach this code.
121
686138
  if (env_->async_hooks()->fields()[AsyncHooks::kTotals]) {
122
46145
    CHECK_EQ(env_->execution_async_id(), 0);
123
46145
    CHECK_EQ(env_->trigger_async_id(), 0);
124
  }
125
126

686139
  if (!tick_info->has_tick_scheduled() && !tick_info->has_rejection_to_warn()) {
127
199280
    return;
128
  }
129
130
973624
  HandleScope handle_scope(env_->isolate());
131
486861
  Local<Object> process = env_->process_object();
132
133
486861
  if (!env_->can_call_into_js()) return;
134
135
486861
  Local<Function> tick_callback = env_->tick_callback_function();
136
137
  // The tick is triggered before JS land calls SetTickCallback
138
  // to initializes the tick callback during bootstrap.
139
486861
  CHECK(!tick_callback.IsEmpty());
140
141
1460485
  if (tick_callback->Call(env_->context(), process, 0, nullptr).IsEmpty()) {
142
487
    failed_ = true;
143
  }
144
486763
  perform_stopping_check();
145
}
146
147
698514
MaybeLocal<Value> InternalMakeCallback(Environment* env,
148
                                       Local<Object> resource,
149
                                       Local<Object> recv,
150
                                       const Local<Function> callback,
151
                                       int argc,
152
                                       Local<Value> argv[],
153
                                       async_context asyncContext) {
154
698514
  CHECK(!recv.IsEmpty());
155
#ifdef DEBUG
156
  for (int i = 0; i < argc; i++)
157
    CHECK(!argv[i].IsEmpty());
158
#endif
159
160
698514
  Local<Function> hook_cb = env->async_hooks_callback_trampoline();
161
698583
  int flags = InternalCallbackScope::kNoFlags;
162
698583
  bool use_async_hooks_trampoline = false;
163
698583
  AsyncHooks* async_hooks = env->async_hooks();
164
698573
  if (!hook_cb.IsEmpty()) {
165
    // Use the callback trampoline if there are any before or after hooks, or
166
    // we can expect some kind of usage of async_hooks.executionAsyncResource().
167
698564
    flags = InternalCallbackScope::kSkipAsyncHooks;
168
698606
    use_async_hooks_trampoline =
169
1397174
        async_hooks->fields()[AsyncHooks::kBefore] +
170
2095802
        async_hooks->fields()[AsyncHooks::kAfter] +
171
1397216
        async_hooks->fields()[AsyncHooks::kUsesExecutionAsyncResource] > 0;
172
  }
173
174
1397090
  InternalCallbackScope scope(env, resource, asyncContext, flags);
175
698607
  if (scope.Failed()) {
176
789
    return MaybeLocal<Value>();
177
  }
178
179
  MaybeLocal<Value> ret;
180
181
697812
  if (use_async_hooks_trampoline) {
182
55557
    MaybeStackBuffer<Local<Value>, 16> args(3 + argc);
183
55562
    args[0] = v8::Number::New(env->isolate(), asyncContext.async_id);
184
55562
    args[1] = resource;
185
55562
    args[2] = callback;
186
35974
    for (int i = 0; i < argc; i++) {
187
8193
      args[i + 3] = argv[i];
188
    }
189
83343
    ret = hook_cb->Call(env->context(), recv, args.length(), &args[0]);
190
  } else {
191
1340056
    ret = callback->Call(env->context(), recv, argc, argv);
192
  }
193
194
697773
  if (ret.IsEmpty()) {
195
687
    scope.MarkAsFailed();
196
687
    return MaybeLocal<Value>();
197
  }
198
199
697086
  scope.Close();
200
696999
  if (scope.Failed()) {
201
453
    return MaybeLocal<Value>();
202
  }
203
204
696546
  return ret;
205
}
206
207
// Public MakeCallback()s
208
209
9489
MaybeLocal<Value> MakeCallback(Isolate* isolate,
210
                               Local<Object> recv,
211
                               const char* method,
212
                               int argc,
213
                               Local<Value> argv[],
214
                               async_context asyncContext) {
215
  Local<String> method_string =
216
18979
      String::NewFromUtf8(isolate, method).ToLocalChecked();
217
9490
  return MakeCallback(isolate, recv, method_string, argc, argv, asyncContext);
218
}
219
220
9497
MaybeLocal<Value> MakeCallback(Isolate* isolate,
221
                               Local<Object> recv,
222
                               Local<String> symbol,
223
                               int argc,
224
                               Local<Value> argv[],
225
                               async_context asyncContext) {
226
  Local<Value> callback_v =
227
28493
      recv->Get(isolate->GetCurrentContext(), symbol).ToLocalChecked();
228
9498
  if (callback_v.IsEmpty()) return Local<Value>();
229
9498
  if (!callback_v->IsFunction()) return Local<Value>();
230
9499
  Local<Function> callback = callback_v.As<Function>();
231
9499
  return MakeCallback(isolate, recv, callback, argc, argv, asyncContext);
232
}
233
234
41882
MaybeLocal<Value> MakeCallback(Isolate* isolate,
235
                               Local<Object> recv,
236
                               Local<Function> callback,
237
                               int argc,
238
                               Local<Value> argv[],
239
                               async_context asyncContext) {
240
  // Observe the following two subtleties:
241
  //
242
  // 1. The environment is retrieved from the callback function's context.
243
  // 2. The context to enter is retrieved from the environment.
244
  //
245
  // Because of the AssignToContext() call in src/node_contextify.cc,
246
  // the two contexts need not be the same.
247
41882
  Environment* env = Environment::GetCurrent(callback->CreationContext());
248
41882
  CHECK_NOT_NULL(env);
249
41882
  Context::Scope context_scope(env->context());
250
  MaybeLocal<Value> ret =
251
41881
      InternalMakeCallback(env, recv, recv, callback, argc, argv, asyncContext);
252

41858
  if (ret.IsEmpty() && env->async_callback_scope_depth() == 0) {
253
    // This is only for legacy compatibility and we may want to look into
254
    // removing/adjusting it.
255
2094
    return Undefined(env->isolate());
256
  }
257
40812
  return ret;
258
}
259
260
// Legacy MakeCallback()s
261
262
Local<Value> MakeCallback(Isolate* isolate,
263
                          Local<Object> recv,
264
                          const char* method,
265
                          int argc,
266
                          Local<Value>* argv) {
267
  EscapableHandleScope handle_scope(isolate);
268
  return handle_scope.Escape(
269
      MakeCallback(isolate, recv, method, argc, argv, {0, 0})
270
          .FromMaybe(Local<Value>()));
271
}
272
273
Local<Value> MakeCallback(Isolate* isolate,
274
                          Local<Object> recv,
275
                          Local<String> symbol,
276
                          int argc,
277
                          Local<Value>* argv) {
278
  EscapableHandleScope handle_scope(isolate);
279
  return handle_scope.Escape(
280
      MakeCallback(isolate, recv, symbol, argc, argv, {0, 0})
281
          .FromMaybe(Local<Value>()));
282
}
283
284
Local<Value> MakeCallback(Isolate* isolate,
285
                          Local<Object> recv,
286
                          Local<Function> callback,
287
                          int argc,
288
                          Local<Value>* argv) {
289
  EscapableHandleScope handle_scope(isolate);
290
  return handle_scope.Escape(
291
      MakeCallback(isolate, recv, callback, argc, argv, {0, 0})
292
          .FromMaybe(Local<Value>()));
293
}
294
295

14970
}  // namespace node