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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:	123	137	89.8 %
Date:	2020-11-20 19:51:53	Branches:	78	96	81.2 %


#include "node.h"
#include "async_wrap-inl.h"
#include "env-inl.h"
#include "v8.h"

namespace node {

using v8::Context;
using v8::EscapableHandleScope;
using v8::Function;
using v8::HandleScope;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::MicrotasksScope;
using v8::Object;
using v8::String;
using v8::Value;

CallbackScope::CallbackScope(Isolate* isolate,
                             Local<Object> object,
                             async_context asyncContext)
  : private_(new InternalCallbackScope(Environment::GetCurrent(isolate),
                                       object,
                                       asyncContext)),
    try_catch_(isolate) {
  try_catch_.SetVerbose(true);
}

CallbackScope::~CallbackScope() {
  if (try_catch_.HasCaught())
    private_->MarkAsFailed();
  delete private_;
}

InternalCallbackScope::InternalCallbackScope(AsyncWrap* async_wrap, int flags)
    : InternalCallbackScope(async_wrap->env(),
                            async_wrap->object(),
                            { async_wrap->get_async_id(),
                              async_wrap->get_trigger_async_id() },
                            flags) {}

InternalCallbackScope::InternalCallbackScope(Environment* env,
                                             Local<Object> object,
                                             const async_context& asyncContext,
                                             int flags)
  : env_(env),
    async_context_(asyncContext),
    object_(object),
    skip_hooks_(flags & kSkipAsyncHooks),
    skip_task_queues_(flags & kSkipTaskQueues) {
  CHECK_NOT_NULL(env);
  env->PushAsyncCallbackScope();

  if (!env->can_call_into_js()) {
    failed_ = true;
    return;
  }

  HandleScope handle_scope(env->isolate());
  // If you hit this assertion, you forgot to enter the v8::Context first.
  CHECK_EQ(Environment::GetCurrent(env->isolate()), env);

  env->async_hooks()->push_async_context(
    async_context_.async_id, async_context_.trigger_async_id, object);

  pushed_ids_ = true;

  if (asyncContext.async_id != 0 && !skip_hooks_) {
    // No need to check a return value because the application will exit if
    // an exception occurs.
    AsyncWrap::EmitBefore(env, asyncContext.async_id);
  }
}

InternalCallbackScope::~InternalCallbackScope() {
  Close();
  env_->PopAsyncCallbackScope();
}

void InternalCallbackScope::Close() {
  if (closed_) return;
  closed_ = true;

  if (!env_->can_call_into_js()) return;
  auto perform_stopping_check = [&]() {
    if (env_->is_stopping()) {
      MarkAsFailed();
      env_->async_hooks()->clear_async_id_stack();
    }
  };
  perform_stopping_check();

  if (!failed_ && async_context_.async_id != 0 && !skip_hooks_) {
    AsyncWrap::EmitAfter(env_, async_context_.async_id);
  }

  if (pushed_ids_)
    env_->async_hooks()->pop_async_context(async_context_.async_id);

  if (failed_) return;

  if (env_->async_callback_scope_depth() > 1 || skip_task_queues_) {
    return;
  }

  TickInfo* tick_info = env_->tick_info();

  if (!env_->can_call_into_js()) return;

  auto weakref_cleanup = OnScopeLeave([&]() { env_->RunWeakRefCleanup(); });

  if (!tick_info->has_tick_scheduled()) {
    MicrotasksScope::PerformCheckpoint(env_->isolate());

    perform_stopping_check();
  }

  // Make sure the stack unwound properly. If there are nested MakeCallback's
  // then it should return early and not reach this code.
  if (env_->async_hooks()->fields()[AsyncHooks::kTotals]) {
    CHECK_EQ(env_->execution_async_id(), 0);
    CHECK_EQ(env_->trigger_async_id(), 0);
  }

  if (!tick_info->has_tick_scheduled() && !tick_info->has_rejection_to_warn()) {
    return;
  }

  HandleScope handle_scope(env_->isolate());
  Local<Object> process = env_->process_object();

  if (!env_->can_call_into_js()) return;

  Local<Function> tick_callback = env_->tick_callback_function();

  // The tick is triggered before JS land calls SetTickCallback
  // to initializes the tick callback during bootstrap.
  CHECK(!tick_callback.IsEmpty());

  if (tick_callback->Call(env_->context(), process, 0, nullptr).IsEmpty()) {
    failed_ = true;
  }
  perform_stopping_check();
}

MaybeLocal<Value> InternalMakeCallback(Environment* env,
                                       Local<Object> resource,
                                       Local<Object> recv,
                                       const Local<Function> callback,
                                       int argc,
                                       Local<Value> argv[],
                                       async_context asyncContext) {
  CHECK(!recv.IsEmpty());
#ifdef DEBUG
  for (int i = 0; i < argc; i++)
    CHECK(!argv[i].IsEmpty());
#endif

  Local<Function> hook_cb = env->async_hooks_callback_trampoline();
  int flags = InternalCallbackScope::kNoFlags;
  bool use_async_hooks_trampoline = false;
  AsyncHooks* async_hooks = env->async_hooks();
  if (!hook_cb.IsEmpty()) {
    // Use the callback trampoline if there are any before or after hooks, or
    // we can expect some kind of usage of async_hooks.executionAsyncResource().
    flags = InternalCallbackScope::kSkipAsyncHooks;
    use_async_hooks_trampoline =
        async_hooks->fields()[AsyncHooks::kBefore] +
        async_hooks->fields()[AsyncHooks::kAfter] +
        async_hooks->fields()[AsyncHooks::kUsesExecutionAsyncResource] > 0;
  }

  InternalCallbackScope scope(env, resource, asyncContext, flags);
  if (scope.Failed()) {
    return MaybeLocal<Value>();
  }

  MaybeLocal<Value> ret;

  if (use_async_hooks_trampoline) {
    MaybeStackBuffer<Local<Value>, 16> args(3 + argc);
    args[0] = v8::Number::New(env->isolate(), asyncContext.async_id);
    args[1] = resource;
    args[2] = callback;
    for (int i = 0; i < argc; i++) {
      args[i + 3] = argv[i];
    }
    ret = hook_cb->Call(env->context(), recv, args.length(), &args[0]);
  } else {
    ret = callback->Call(env->context(), recv, argc, argv);
  }

  if (ret.IsEmpty()) {
    scope.MarkAsFailed();
    return MaybeLocal<Value>();
  }

  scope.Close();
  if (scope.Failed()) {
    return MaybeLocal<Value>();
  }

  return ret;
}

// Public MakeCallback()s

MaybeLocal<Value> MakeCallback(Isolate* isolate,
                               Local<Object> recv,
                               const char* method,
                               int argc,
                               Local<Value> argv[],
                               async_context asyncContext) {
  Local<String> method_string =
      String::NewFromUtf8(isolate, method).ToLocalChecked();
  return MakeCallback(isolate, recv, method_string, argc, argv, asyncContext);
}

MaybeLocal<Value> MakeCallback(Isolate* isolate,
                               Local<Object> recv,
                               Local<String> symbol,
                               int argc,
                               Local<Value> argv[],
                               async_context asyncContext) {
  // Check can_call_into_js() first because calling Get() might do so.
  Environment* env = Environment::GetCurrent(recv->CreationContext());
  CHECK_NOT_NULL(env);
  if (!env->can_call_into_js()) return Local<Value>();

  Local<Value> callback_v;
  if (!recv->Get(isolate->GetCurrentContext(), symbol).ToLocal(&callback_v))
    return Local<Value>();
  if (!callback_v->IsFunction()) {
    // This used to return an empty value, but Undefined() makes more sense
    // since no exception is pending here.
    return Undefined(isolate);
  }
  Local<Function> callback = callback_v.As<Function>();
  return MakeCallback(isolate, recv, callback, argc, argv, asyncContext);
}

MaybeLocal<Value> MakeCallback(Isolate* isolate,
                               Local<Object> recv,
                               Local<Function> callback,
                               int argc,
                               Local<Value> argv[],
                               async_context asyncContext) {
  // Observe the following two subtleties:
  //
  // 1. The environment is retrieved from the callback function's context.
  // 2. The context to enter is retrieved from the environment.
  //
  // Because of the AssignToContext() call in src/node_contextify.cc,
  // the two contexts need not be the same.
  Environment* env = Environment::GetCurrent(callback->CreationContext());
  CHECK_NOT_NULL(env);
  Context::Scope context_scope(env->context());
  MaybeLocal<Value> ret =
      InternalMakeCallback(env, recv, recv, callback, argc, argv, asyncContext);
  if (ret.IsEmpty() && env->async_callback_scope_depth() == 0) {
    // This is only for legacy compatibility and we may want to look into
    // removing/adjusting it.
    return Undefined(env->isolate());
  }
  return ret;
}

// Legacy MakeCallback()s

Local<Value> MakeCallback(Isolate* isolate,
                          Local<Object> recv,
                          const char* method,
                          int argc,
                          Local<Value>* argv) {
  EscapableHandleScope handle_scope(isolate);
  return handle_scope.Escape(
      MakeCallback(isolate, recv, method, argc, argv, {0, 0})
          .FromMaybe(Local<Value>()));
}

Local<Value> MakeCallback(Isolate* isolate,
                          Local<Object> recv,
                          Local<String> symbol,
                          int argc,
                          Local<Value>* argv) {
  EscapableHandleScope handle_scope(isolate);
  return handle_scope.Escape(
      MakeCallback(isolate, recv, symbol, argc, argv, {0, 0})
          .FromMaybe(Local<Value>()));
}

Local<Value> MakeCallback(Isolate* isolate,
                          Local<Object> recv,
                          Local<Function> callback,
                          int argc,
                          Local<Value>* argv) {
  EscapableHandleScope handle_scope(isolate);
  return handle_scope.Escape(
      MakeCallback(isolate, recv, callback, argc, argv, {0, 0})
          .FromMaybe(Local<Value>()));
}

}  // namespace node


Generated by: GCOVR (Version 3.4)

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		51509	InternalCallbackScope::InternalCallbackScope(AsyncWrap* async_wrap, int flags)
37			: InternalCallbackScope(async_wrap->env(),
38			async_wrap->object(),
39		51509	{ async_wrap->get_async_id(),
40		51509	async_wrap->get_trigger_async_id() },
41		103018	flags) {}
42
43		1251715	InternalCallbackScope::InternalCallbackScope(Environment* env,
44			Local<Object> object,
45			const async_context& asyncContext,
46		1251715	int flags)
47			: env_(env),
48			async_context_(asyncContext),
49			object_(object),
50		1251715	skip_hooks_(flags & kSkipAsyncHooks),
51		2503430	skip_task_queues_(flags & kSkipTaskQueues) {
52	✗✓	1251715	CHECK_NOT_NULL(env);
53		1251715	env->PushAsyncCallbackScope();
54
55	✓✓	1251752	if (!env->can_call_into_js()) {
56		10089	failed_ = true;
57		10089	return;
58			}
59
60		2483322	HandleScope handle_scope(env->isolate());
61			// If you hit this assertion, you forgot to enter the v8::Context first.
62	✗✓	1241687	CHECK_EQ(Environment::GetCurrent(env->isolate()), env);
63
64		1241718	env->async_hooks()->push_async_context(
65		1241707	async_context_.async_id, async_context_.trigger_async_id, object);
66
67		1241694	pushed_ids_ = true;
68
69	✓✓✓✓	1241694	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		52149	AsyncWrap::EmitBefore(env, asyncContext.async_id);
73			}
74			}
75
76		2502457	InternalCallbackScope::~InternalCallbackScope() {
77		1251255	Close();
78		1251197	env_->PopAsyncCallbackScope();
79		1251202	}
80
81		1936015	void InternalCallbackScope::Close() {
82	✓✓	3461453	if (closed_) return;
83		1251439	closed_ = true;
84
85	✓✓	1251439	if (!env_->can_call_into_js()) return;
86		2400920	auto perform_stopping_check = [&]() {
87	✓✓	2400937	if (env_->is_stopping()) {
88		17	MarkAsFailed();
89		17	env_->async_hooks()->clear_async_id_stack();
90			}
91		3642086	};
92		1241240	perform_stopping_check();
93
94	✓✓✓✓ ✓✓	1241203	if (!failed_ && async_context_.async_id != 0 && !skip_hooks_) {
95		52137	AsyncWrap::EmitAfter(env_, async_context_.async_id);
96			}
97
98	✓✗	1241205	if (pushed_ids_)
99		1241205	env_->async_hooks()->pop_async_context(async_context_.async_id);
100
101	✓✓	1241228	if (failed_) return;
102
103	✓✓✓✓ ✓✓	1240241	if (env_->async_callback_scope_depth() > 1 \|\| skip_task_queues_) {
104		80961	return;
105			}
106
107		1159278	TickInfo* tick_info = env_->tick_info();
108
109	✗✓	1159275	if (!env_->can_call_into_js()) return;
110
111		2728745	auto weakref_cleanup = OnScopeLeave([&]() { env_->RunWeakRefCleanup(); });
112
113	✓✓	1159238	if (!tick_info->has_tick_scheduled()) {
114		749338	MicrotasksScope::PerformCheckpoint(env_->isolate());
115
116		749441	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	✓✓	1159338	if (env_->async_hooks()->fields()[AsyncHooks::kTotals]) {
122	✗✓	64274	CHECK_EQ(env_->execution_async_id(), 0);
123	✗✓	64274	CHECK_EQ(env_->trigger_async_id(), 0);
124			}
125
126	✓✓✓✓ ✓✓	1159328	if (!tick_info->has_tick_scheduled() && !tick_info->has_rejection_to_warn()) {
127		748770	return;
128			}
129
130	✓✓	820911	HandleScope handle_scope(env_->isolate());
131		410548	Local<Object> process = env_->process_object();
132
133	✗✓	410548	if (!env_->can_call_into_js()) return;
134
135		410548	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	✗✓	410548	CHECK(!tick_callback.IsEmpty());
140
141	✓✓	1231459	if (tick_callback->Call(env_->context(), process, 0, nullptr).IsEmpty()) {
142		158	failed_ = true;
143			}
144	✓✗	410363	perform_stopping_check();
145			}
146
147		686727	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	✗✓	686727	CHECK(!recv.IsEmpty());
155			#ifdef DEBUG
156			for (int i = 0; i < argc; i++)
157			CHECK(!argv[i].IsEmpty());
158			#endif
159
160		686727	Local<Function> hook_cb = env->async_hooks_callback_trampoline();
161		686735	int flags = InternalCallbackScope::kNoFlags;
162		686735	bool use_async_hooks_trampoline = false;
163		686735	AsyncHooks* async_hooks = env->async_hooks();
164	✓✓	686731	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		686716	flags = InternalCallbackScope::kSkipAsyncHooks;
168		686719	use_async_hooks_trampoline =
169		1373443	async_hooks->fields()[AsyncHooks::kBefore] +
170		2060185	async_hooks->fields()[AsyncHooks::kAfter] +
171		1373446	async_hooks->fields()[AsyncHooks::kUsesExecutionAsyncResource] > 0;
172			}
173
174		1373289	InternalCallbackScope scope(env, resource, asyncContext, flags);
175	✓✓	686797	if (scope.Failed()) {
176		890	return MaybeLocal<Value>();
177			}
178
179			MaybeLocal<Value> ret;
180
181	✓✓	685887	if (use_async_hooks_trampoline) {
182		56168	MaybeStackBuffer<Local<Value>, 16> args(3 + argc);
183		56172	args[0] = v8::Number::New(env->isolate(), asyncContext.async_id);
184		56172	args[1] = resource;
185		56172	args[2] = callback;
186	✓✓	36338	for (int i = 0; i < argc; i++) {
187		8252	args[i + 3] = argv[i];
188			}
189		84258	ret = hook_cb->Call(env->context(), recv, args.length(), &args[0]);
190			} else {
191		1315623	ret = callback->Call(env->context(), recv, argc, argv);
192			}
193
194	✓✓	685866	if (ret.IsEmpty()) {
195		1026	scope.MarkAsFailed();
196		1026	return MaybeLocal<Value>();
197			}
198
199		684840	scope.Close();
200	✓✓	684642	if (scope.Failed()) {
201		73	return MaybeLocal<Value>();
202			}
203
204		684566	return ret;
205			}
206
207			// Public MakeCallback()s
208
209		8800	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		17600	String::NewFromUtf8(isolate, method).ToLocalChecked();
217		8800	return MakeCallback(isolate, recv, method_string, argc, argv, asyncContext);
218			}
219
220		8808	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			// Check can_call_into_js() first because calling Get() might do so.
227		8808	Environment* env = Environment::GetCurrent(recv->CreationContext());
228	✗✓	8808	CHECK_NOT_NULL(env);
229	✗✓	8808	if (!env->can_call_into_js()) return Local<Value>();
230
231			Local<Value> callback_v;
232	✗✓	26424	if (!recv->Get(isolate->GetCurrentContext(), symbol).ToLocal(&callback_v))
233			return Local<Value>();
234	✗✓	8808	if (!callback_v->IsFunction()) {
235			// This used to return an empty value, but Undefined() makes more sense
236			// since no exception is pending here.
237			return Undefined(isolate);
238			}
239		8808	Local<Function> callback = callback_v.As<Function>();
240		8808	return MakeCallback(isolate, recv, callback, argc, argv, asyncContext);
241			}
242
243		110526	MaybeLocal<Value> MakeCallback(Isolate* isolate,
244			Local<Object> recv,
245			Local<Function> callback,
246			int argc,
247			Local<Value> argv[],
248			async_context asyncContext) {
249			// Observe the following two subtleties:
250			//
251			// 1. The environment is retrieved from the callback function's context.
252			// 2. The context to enter is retrieved from the environment.
253			//
254			// Because of the AssignToContext() call in src/node_contextify.cc,
255			// the two contexts need not be the same.
256		110526	Environment* env = Environment::GetCurrent(callback->CreationContext());
257	✗✓	110526	CHECK_NOT_NULL(env);
258		110526	Context::Scope context_scope(env->context());
259			MaybeLocal<Value> ret =
260		110526	InternalMakeCallback(env, recv, recv, callback, argc, argv, asyncContext);
261	✓✓✓✓ ✓✓	110507	if (ret.IsEmpty() && env->async_callback_scope_depth() == 0) {
262			// This is only for legacy compatibility and we may want to look into
263			// removing/adjusting it.
264		2002	return Undefined(env->isolate());
265			}
266		109506	return ret;
267			}
268
269			// Legacy MakeCallback()s
270
271			Local<Value> MakeCallback(Isolate* isolate,
272			Local<Object> recv,
273			const char* method,
274			int argc,
275			Local<Value>* argv) {
276			EscapableHandleScope handle_scope(isolate);
277			return handle_scope.Escape(
278			MakeCallback(isolate, recv, method, argc, argv, {0, 0})
279			.FromMaybe(Local<Value>()));
280			}
281
282			Local<Value> MakeCallback(Isolate* isolate,
283			Local<Object> recv,
284			Local<String> symbol,
285			int argc,
286			Local<Value>* argv) {
287			EscapableHandleScope handle_scope(isolate);
288			return handle_scope.Escape(
289			MakeCallback(isolate, recv, symbol, argc, argv, {0, 0})
290			.FromMaybe(Local<Value>()));
291			}
292
293			Local<Value> MakeCallback(Isolate* isolate,
294			Local<Object> recv,
295			Local<Function> callback,
296			int argc,
297			Local<Value>* argv) {
298			EscapableHandleScope handle_scope(isolate);
299			return handle_scope.Escape(
300			MakeCallback(isolate, recv, callback, argc, argv, {0, 0})
301			.FromMaybe(Local<Value>()));
302			}
303
304	✓✗✓✗	14034	} // namespace node