GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: inspector_js_api.cc Lines: 193 214 90.2 %
Date: 2022-11-08 04:21:23 Branches: 37 80 46.2 %

Line Branch Exec Source
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#include "base_object-inl.h"
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#include "inspector_agent.h"
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#include "inspector_io.h"
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#include "memory_tracker-inl.h"
5
#include "node_external_reference.h"
6
#include "util-inl.h"
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#include "v8-inspector.h"
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#include "v8.h"
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10
#include <memory>
11
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namespace node {
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namespace inspector {
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namespace {
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16
using v8::Context;
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using v8::Function;
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using v8::FunctionCallbackInfo;
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using v8::FunctionTemplate;
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using v8::Global;
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using v8::HandleScope;
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using v8::Isolate;
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using v8::Local;
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using v8::MaybeLocal;
25
using v8::NewStringType;
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using v8::Object;
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using v8::String;
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using v8::Uint32;
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using v8::Value;
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31
using v8_inspector::StringBuffer;
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using v8_inspector::StringView;
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34
1241
std::unique_ptr<StringBuffer> ToProtocolString(Isolate* isolate,
35
                                               Local<Value> value) {
36
1241
  TwoByteValue buffer(isolate, value);
37
1241
  return StringBuffer::create(StringView(*buffer, buffer.length()));
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}
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40
struct LocalConnection {
41
924
  static std::unique_ptr<InspectorSession> Connect(
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      Agent* inspector, std::unique_ptr<InspectorSessionDelegate> delegate) {
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924
    return inspector->Connect(std::move(delegate), false);
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  }
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46
788
  static Local<String> GetClassName(Environment* env) {
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788
    return FIXED_ONE_BYTE_STRING(env->isolate(), "Connection");
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  }
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};
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51
struct MainThreadConnection {
52
2
  static std::unique_ptr<InspectorSession> Connect(
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      Agent* inspector, std::unique_ptr<InspectorSessionDelegate> delegate) {
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2
    return inspector->ConnectToMainThread(std::move(delegate), true);
55
  }
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57
788
  static Local<String> GetClassName(Environment* env) {
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788
    return FIXED_ONE_BYTE_STRING(env->isolate(), "MainThreadConnection");
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  }
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};
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template <typename ConnectionType>
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class JSBindingsConnection : public AsyncWrap {
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 public:
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  class JSBindingsSessionDelegate : public InspectorSessionDelegate {
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   public:
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1852
    JSBindingsSessionDelegate(Environment* env,
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                              JSBindingsConnection* connection)
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                              : env_(env),
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1852
                                connection_(connection) {
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1852
    }
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73
14472
    void SendMessageToFrontend(const v8_inspector::StringView& message)
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        override {
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14472
      Isolate* isolate = env_->isolate();
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14472
      HandleScope handle_scope(isolate);
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28944
      Context::Scope context_scope(env_->context());
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      Local<Value> argument;
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14472
      if (!String::NewFromTwoByte(isolate, message.characters16(),
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                                  NewStringType::kNormal,
81
28944
                                  message.length()).ToLocal(&argument)) return;
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14472
      connection_->OnMessage(argument);
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    }
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   private:
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    Environment* env_;
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    BaseObjectPtr<JSBindingsConnection> connection_;
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  };
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1852
  JSBindingsConnection(Environment* env,
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                       Local<Object> wrap,
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                       Local<Function> callback)
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                       : AsyncWrap(env, wrap, PROVIDER_INSPECTORJSBINDING),
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1852
                         callback_(env->isolate(), callback) {
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1852
    Agent* inspector = env->inspector_agent();
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1852
    session_ = ConnectionType::Connect(
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        inspector, std::make_unique<JSBindingsSessionDelegate>(env, this));
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1852
  }
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14472
  void OnMessage(Local<Value> value) {
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28944
    MakeCallback(callback_.Get(env()->isolate()), 1, &value);
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14472
  }
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104
3152
  static void Bind(Environment* env, Local<Object> target) {
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3152
    Isolate* isolate = env->isolate();
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    Local<FunctionTemplate> tmpl =
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3152
        NewFunctionTemplate(isolate, JSBindingsConnection::New);
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6304
    tmpl->InstanceTemplate()->SetInternalFieldCount(
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        JSBindingsConnection::kInternalFieldCount);
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3152
    tmpl->Inherit(AsyncWrap::GetConstructorTemplate(env));
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3152
    SetProtoMethod(isolate, tmpl, "dispatch", JSBindingsConnection::Dispatch);
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3152
    SetProtoMethod(
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        isolate, tmpl, "disconnect", JSBindingsConnection::Disconnect);
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3152
    SetConstructorFunction(
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        env->context(), target, ConnectionType::GetClassName(env), tmpl);
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3152
  }
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118
1852
  static void New(const FunctionCallbackInfo<Value>& info) {
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1852
    Environment* env = Environment::GetCurrent(info);
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1852
    CHECK(info[0]->IsFunction());
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3704
    Local<Function> callback = info[0].As<Function>();
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1852
    new JSBindingsConnection(env, info.This(), callback);
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1852
  }
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125
1822
  void Disconnect() {
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1822
    session_.reset();
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1822
    delete this;
128
  }
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130
1822
  static void Disconnect(const FunctionCallbackInfo<Value>& info) {
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    JSBindingsConnection* session;
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1822
    ASSIGN_OR_RETURN_UNWRAP(&session, info.Holder());
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1822
    session->Disconnect();
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  }
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136
2482
  static void Dispatch(const FunctionCallbackInfo<Value>& info) {
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2482
    Environment* env = Environment::GetCurrent(info);
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    JSBindingsConnection* session;
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2482
    ASSIGN_OR_RETURN_UNWRAP(&session, info.Holder());
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4964
    CHECK(info[0]->IsString());
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142
2482
    if (session->session_) {
143
4964
      session->session_->Dispatch(
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4964
          ToProtocolString(env->isolate(), info[0])->string());
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    }
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  }
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148
4
  void MemoryInfo(MemoryTracker* tracker) const override {
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4
    tracker->TrackField("callback", callback_);
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4
    tracker->TrackFieldWithSize(
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        "session", sizeof(*session_), "InspectorSession");
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  }
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154
4
  SET_MEMORY_INFO_NAME(JSBindingsConnection)
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2
  SET_SELF_SIZE(JSBindingsConnection)
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157
  bool IsNotIndicativeOfMemoryLeakAtExit() const override {
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    return true;  // Binding connections emit events on their own.
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  }
160
161
 private:
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  std::unique_ptr<InspectorSession> session_;
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  Global<Function> callback_;
164
};
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166
72299
static bool InspectorEnabled(Environment* env) {
167
72299
  Agent* agent = env->inspector_agent();
168
72299
  return agent->IsActive();
169
}
170
171
788
void SetConsoleExtensionInstaller(const FunctionCallbackInfo<Value>& info) {
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788
  auto env = Environment::GetCurrent(info);
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174
788
  CHECK_EQ(info.Length(), 1);
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788
  CHECK(info[0]->IsFunction());
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177
1576
  env->set_inspector_console_extension_installer(info[0].As<Function>());
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788
}
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180
8
void CallAndPauseOnStart(const FunctionCallbackInfo<v8::Value>& args) {
181
8
  Environment* env = Environment::GetCurrent(args);
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8
  CHECK_GT(args.Length(), 1);
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8
  CHECK(args[0]->IsFunction());
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14
  SlicedArguments call_args(args, /* start */ 2);
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8
  env->inspector_agent()->PauseOnNextJavascriptStatement("Break on start");
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  v8::MaybeLocal<v8::Value> retval =
187
22
      args[0].As<v8::Function>()->Call(env->context(), args[1],
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16
                                       call_args.length(), call_args.out());
189
6
  if (!retval.IsEmpty()) {
190
10
    args.GetReturnValue().Set(retval.ToLocalChecked());
191
  }
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6
}
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194
72291
void InspectorConsoleCall(const FunctionCallbackInfo<Value>& info) {
195
72291
  Environment* env = Environment::GetCurrent(info);
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72291
  Isolate* isolate = env->isolate();
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72291
  Local<Context> context = isolate->GetCurrentContext();
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72291
  CHECK_GE(info.Length(), 2);
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72291
  SlicedArguments call_args(info, /* start */ 2);
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72291
  if (InspectorEnabled(env)) {
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72290
    Local<Value> inspector_method = info[0];
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72290
    CHECK(inspector_method->IsFunction());
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72290
    if (!env->is_in_inspector_console_call()) {
204
72289
      env->set_is_in_inspector_console_call(true);
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      MaybeLocal<Value> ret =
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72289
          inspector_method.As<Function>()->Call(context,
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                                                info.Holder(),
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72289
                                                call_args.length(),
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216867
                                                call_args.out());
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72289
      env->set_is_in_inspector_console_call(false);
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72289
      if (ret.IsEmpty())
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9
        return;
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    }
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  }
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72282
  Local<Value> node_method = info[1];
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72282
  CHECK(node_method->IsFunction());
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144564
  USE(node_method.As<Function>()->Call(context,
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                                   info.Holder(),
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72282
                                   call_args.length(),
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289128
                                   call_args.out()));
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}
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23
static void* GetAsyncTask(int64_t asyncId) {
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  // The inspector assumes that when other clients use its asyncTask* API,
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  // they use real pointers, or at least something aligned like real pointer.
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  // In general it means that our task_id should always be even.
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  //
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  // On 32bit platforms, the 64bit asyncId would get truncated when converted
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  // to a 32bit pointer. However, the javascript part will never enable
231
  // the async_hook on 32bit platforms, therefore the truncation will never
232
  // happen in practice.
233
23
  return reinterpret_cast<void*>(asyncId << 1);
234
}
235
236
template <void (Agent::*asyncTaskFn)(void*)>
237
40
static void InvokeAsyncTaskFnWithId(const FunctionCallbackInfo<Value>& args) {
238
40
  Environment* env = Environment::GetCurrent(args);
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40
  CHECK(args[0]->IsNumber());
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40
  int64_t task_id = args[0]->IntegerValue(env->context()).FromJust();
241
40
  (env->inspector_agent()->*asyncTaskFn)(GetAsyncTask(task_id));
242
40
}
243
244
3
static void AsyncTaskScheduledWrapper(const FunctionCallbackInfo<Value>& args) {
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3
  Environment* env = Environment::GetCurrent(args);
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247
6
  CHECK(args[0]->IsString());
248
6
  Local<String> task_name = args[0].As<String>();
249
6
  String::Value task_name_value(args.GetIsolate(), task_name);
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3
  StringView task_name_view(*task_name_value, task_name_value.length());
251
252
3
  CHECK(args[1]->IsNumber());
253
3
  int64_t task_id = args[1]->IntegerValue(env->context()).FromJust();
254
3
  void* task = GetAsyncTask(task_id);
255
256
3
  CHECK(args[2]->IsBoolean());
257
3
  bool recurring = args[2]->BooleanValue(args.GetIsolate());
258
259
3
  env->inspector_agent()->AsyncTaskScheduled(task_name_view, task, recurring);
260
3
}
261
262
6341
static void RegisterAsyncHookWrapper(const FunctionCallbackInfo<Value>& args) {
263
6341
  Environment* env = Environment::GetCurrent(args);
264
265
6341
  CHECK(args[0]->IsFunction());
266
12682
  Local<Function> enable_function = args[0].As<Function>();
267
6341
  CHECK(args[1]->IsFunction());
268
6341
  Local<Function> disable_function = args[1].As<Function>();
269
6341
  env->inspector_agent()->RegisterAsyncHook(env->isolate(),
270
    enable_function, disable_function);
271
6341
}
272
273
8
void IsEnabled(const FunctionCallbackInfo<Value>& args) {
274
8
  Environment* env = Environment::GetCurrent(args);
275
8
  args.GetReturnValue().Set(InspectorEnabled(env));
276
8
}
277
278
void Open(const FunctionCallbackInfo<Value>& args) {
279
  Environment* env = Environment::GetCurrent(args);
280
  Agent* agent = env->inspector_agent();
281
282
  if (args.Length() > 0 && args[0]->IsUint32()) {
283
    uint32_t port = args[0].As<Uint32>()->Value();
284
    CHECK_LE(port, std::numeric_limits<uint16_t>::max());
285
    ExclusiveAccess<HostPort>::Scoped host_port(agent->host_port());
286
    host_port->set_port(static_cast<int>(port));
287
  }
288
289
  if (args.Length() > 1 && args[1]->IsString()) {
290
    Utf8Value host(env->isolate(), args[1].As<String>());
291
    ExclusiveAccess<HostPort>::Scoped host_port(agent->host_port());
292
    host_port->set_host(*host);
293
  }
294
295
  agent->StartIoThread();
296
}
297
298
void WaitForDebugger(const FunctionCallbackInfo<Value>& args) {
299
  Environment* env = Environment::GetCurrent(args);
300
  Agent* agent = env->inspector_agent();
301
  if (agent->IsActive())
302
    agent->WaitForConnect();
303
  args.GetReturnValue().Set(agent->IsActive());
304
}
305
306
6
void Url(const FunctionCallbackInfo<Value>& args) {
307
6
  Environment* env = Environment::GetCurrent(args);
308
6
  std::string url = env->inspector_agent()->GetWsUrl();
309
6
  if (url.empty()) {
310
1
    return;
311
  }
312
10
  args.GetReturnValue().Set(OneByteString(env->isolate(), url.c_str()));
313
}
314
315
788
void Initialize(Local<Object> target, Local<Value> unused,
316
                Local<Context> context, void* priv) {
317
788
  Environment* env = Environment::GetCurrent(context);
318
788
  Isolate* isolate = env->isolate();
319
320
  v8::Local<v8::Function> consoleCallFunc =
321
788
      NewFunctionTemplate(isolate,
322
                          InspectorConsoleCall,
323
                          v8::Local<v8::Signature>(),
324
                          v8::ConstructorBehavior::kThrow,
325
788
                          v8::SideEffectType::kHasSideEffect)
326
788
          ->GetFunction(context)
327
788
          .ToLocalChecked();
328
788
  auto name_string = FIXED_ONE_BYTE_STRING(isolate, "consoleCall");
329
1576
  target->Set(context, name_string, consoleCallFunc).Check();
330
788
  consoleCallFunc->SetName(name_string);
331
332
788
  SetMethod(context,
333
            target,
334
            "setConsoleExtensionInstaller",
335
            SetConsoleExtensionInstaller);
336
788
  SetMethod(context, target, "callAndPauseOnStart", CallAndPauseOnStart);
337
788
  SetMethod(context, target, "open", Open);
338
788
  SetMethodNoSideEffect(context, target, "url", Url);
339
788
  SetMethod(context, target, "waitForDebugger", WaitForDebugger);
340
341
788
  SetMethod(context, target, "asyncTaskScheduled", AsyncTaskScheduledWrapper);
342
788
  SetMethod(context,
343
            target,
344
            "asyncTaskCanceled",
345
            InvokeAsyncTaskFnWithId<&Agent::AsyncTaskCanceled>);
346
788
  SetMethod(context,
347
            target,
348
            "asyncTaskStarted",
349
            InvokeAsyncTaskFnWithId<&Agent::AsyncTaskStarted>);
350
788
  SetMethod(context,
351
            target,
352
            "asyncTaskFinished",
353
            InvokeAsyncTaskFnWithId<&Agent::AsyncTaskFinished>);
354
355
788
  SetMethod(context, target, "registerAsyncHook", RegisterAsyncHookWrapper);
356
788
  SetMethodNoSideEffect(context, target, "isEnabled", IsEnabled);
357
358
788
  Local<String> console_string = FIXED_ONE_BYTE_STRING(isolate, "console");
359
360
  // Grab the console from the binding object and expose those to our binding
361
  // layer.
362
788
  Local<Object> binding = context->GetExtrasBindingObject();
363
  target
364
788
      ->Set(context,
365
            console_string,
366
1576
            binding->Get(context, console_string).ToLocalChecked())
367
      .Check();
368
369
788
  JSBindingsConnection<LocalConnection>::Bind(env, target);
370
788
  JSBindingsConnection<MainThreadConnection>::Bind(env, target);
371
788
}
372
373
}  // namespace
374
375
5594
void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
376
5594
  registry->Register(InspectorConsoleCall);
377
5594
  registry->Register(SetConsoleExtensionInstaller);
378
5594
  registry->Register(CallAndPauseOnStart);
379
5594
  registry->Register(Open);
380
5594
  registry->Register(Url);
381
5594
  registry->Register(WaitForDebugger);
382
383
5594
  registry->Register(AsyncTaskScheduledWrapper);
384
5594
  registry->Register(InvokeAsyncTaskFnWithId<&Agent::AsyncTaskCanceled>);
385
5594
  registry->Register(InvokeAsyncTaskFnWithId<&Agent::AsyncTaskStarted>);
386
5594
  registry->Register(InvokeAsyncTaskFnWithId<&Agent::AsyncTaskFinished>);
387
388
5594
  registry->Register(RegisterAsyncHookWrapper);
389
5594
  registry->Register(IsEnabled);
390
391
5594
  registry->Register(JSBindingsConnection<LocalConnection>::New);
392
5594
  registry->Register(JSBindingsConnection<LocalConnection>::Dispatch);
393
5594
  registry->Register(JSBindingsConnection<LocalConnection>::Disconnect);
394
5594
  registry->Register(JSBindingsConnection<MainThreadConnection>::New);
395
5594
  registry->Register(JSBindingsConnection<MainThreadConnection>::Dispatch);
396
5594
  registry->Register(JSBindingsConnection<MainThreadConnection>::Disconnect);
397
5594
}
398
399
}  // namespace inspector
400
}  // namespace node
401
402
5665
NODE_MODULE_CONTEXT_AWARE_INTERNAL(inspector,
403
                                  node::inspector::Initialize)
404
5594
NODE_MODULE_EXTERNAL_REFERENCE(inspector,
405
                               node::inspector::RegisterExternalReferences)