1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/inspector/v8-injected-script-host.h" 6 7 #include "src/base/macros.h" 8 #include "src/inspector/injected-script-native.h" 9 #include "src/inspector/string-util.h" 10 #include "src/inspector/v8-debugger.h" 11 #include "src/inspector/v8-inspector-impl.h" 12 #include "src/inspector/v8-internal-value-type.h" 13 #include "src/inspector/v8-value-copier.h" 14 15 #include "include/v8-inspector.h" 16 17 namespace v8_inspector { 18 19 namespace { 20 21 void setFunctionProperty(v8::Local<v8::Context> context, 22 v8::Local<v8::Object> obj, const char* name, 23 v8::FunctionCallback callback, 24 v8::Local<v8::External> external) { 25 v8::Local<v8::String> funcName = 26 toV8StringInternalized(context->GetIsolate(), name); 27 v8::Local<v8::Function> func; 28 if (!v8::Function::New(context, callback, external, 0, 29 v8::ConstructorBehavior::kThrow) 30 .ToLocal(&func)) 31 return; 32 func->SetName(funcName); 33 createDataProperty(context, obj, funcName, func); 34 } 35 36 V8InspectorImpl* unwrapInspector( 37 const v8::FunctionCallbackInfo<v8::Value>& info) { 38 DCHECK(!info.Data().IsEmpty()); 39 DCHECK(info.Data()->IsExternal()); 40 V8InspectorImpl* inspector = 41 static_cast<V8InspectorImpl*>(info.Data().As<v8::External>()->Value()); 42 DCHECK(inspector); 43 return inspector; 44 } 45 46 } // namespace 47 48 v8::Local<v8::Object> V8InjectedScriptHost::create( 49 v8::Local<v8::Context> context, V8InspectorImpl* inspector) { 50 v8::Isolate* isolate = inspector->isolate(); 51 v8::Local<v8::Object> injectedScriptHost = v8::Object::New(isolate); 52 bool success = injectedScriptHost->SetPrototype(context, v8::Null(isolate)) 53 .FromMaybe(false); 54 DCHECK(success); 55 USE(success); 56 v8::Local<v8::External> debuggerExternal = 57 v8::External::New(isolate, inspector); 58 setFunctionProperty(context, injectedScriptHost, "nullifyPrototype", 59 V8InjectedScriptHost::nullifyPrototypeCallback, 60 debuggerExternal); 61 setFunctionProperty(context, injectedScriptHost, "internalConstructorName", 62 V8InjectedScriptHost::internalConstructorNameCallback, 63 debuggerExternal); 64 setFunctionProperty( 65 context, injectedScriptHost, "formatAccessorsAsProperties", 66 V8InjectedScriptHost::formatAccessorsAsProperties, debuggerExternal); 67 setFunctionProperty(context, injectedScriptHost, "subtype", 68 V8InjectedScriptHost::subtypeCallback, debuggerExternal); 69 setFunctionProperty(context, injectedScriptHost, "getInternalProperties", 70 V8InjectedScriptHost::getInternalPropertiesCallback, 71 debuggerExternal); 72 setFunctionProperty(context, injectedScriptHost, "objectHasOwnProperty", 73 V8InjectedScriptHost::objectHasOwnPropertyCallback, 74 debuggerExternal); 75 setFunctionProperty(context, injectedScriptHost, "bind", 76 V8InjectedScriptHost::bindCallback, debuggerExternal); 77 setFunctionProperty(context, injectedScriptHost, "proxyTargetValue", 78 V8InjectedScriptHost::proxyTargetValueCallback, 79 debuggerExternal); 80 return injectedScriptHost; 81 } 82 83 void V8InjectedScriptHost::nullifyPrototypeCallback( 84 const v8::FunctionCallbackInfo<v8::Value>& info) { 85 CHECK(info.Length() == 1 && info[0]->IsObject()); 86 v8::Isolate* isolate = info.GetIsolate(); 87 info[0] 88 .As<v8::Object>() 89 ->SetPrototype(isolate->GetCurrentContext(), v8::Null(isolate)) 90 .ToChecked(); 91 } 92 93 void V8InjectedScriptHost::internalConstructorNameCallback( 94 const v8::FunctionCallbackInfo<v8::Value>& info) { 95 if (info.Length() < 1 || !info[0]->IsObject()) return; 96 97 v8::Local<v8::Object> object = info[0].As<v8::Object>(); 98 info.GetReturnValue().Set(object->GetConstructorName()); 99 } 100 101 void V8InjectedScriptHost::formatAccessorsAsProperties( 102 const v8::FunctionCallbackInfo<v8::Value>& info) { 103 DCHECK_EQ(info.Length(), 2); 104 info.GetReturnValue().Set(false); 105 if (!info[1]->IsFunction()) return; 106 // Check that function is user-defined. 107 if (info[1].As<v8::Function>()->ScriptId() != v8::UnboundScript::kNoScriptId) 108 return; 109 info.GetReturnValue().Set( 110 unwrapInspector(info)->client()->formatAccessorsAsProperties(info[0])); 111 } 112 113 void V8InjectedScriptHost::subtypeCallback( 114 const v8::FunctionCallbackInfo<v8::Value>& info) { 115 if (info.Length() < 1) return; 116 117 v8::Isolate* isolate = info.GetIsolate(); 118 v8::Local<v8::Value> value = info[0]; 119 if (value->IsObject()) { 120 v8::Local<v8::Value> internalType = v8InternalValueTypeFrom( 121 isolate->GetCurrentContext(), v8::Local<v8::Object>::Cast(value)); 122 if (internalType->IsString()) { 123 info.GetReturnValue().Set(internalType); 124 return; 125 } 126 } 127 if (value->IsArray() || value->IsArgumentsObject()) { 128 info.GetReturnValue().Set(toV8StringInternalized(isolate, "array")); 129 return; 130 } 131 if (value->IsTypedArray()) { 132 info.GetReturnValue().Set(toV8StringInternalized(isolate, "typedarray")); 133 return; 134 } 135 if (value->IsDate()) { 136 info.GetReturnValue().Set(toV8StringInternalized(isolate, "date")); 137 return; 138 } 139 if (value->IsRegExp()) { 140 info.GetReturnValue().Set(toV8StringInternalized(isolate, "regexp")); 141 return; 142 } 143 if (value->IsMap() || value->IsWeakMap()) { 144 info.GetReturnValue().Set(toV8StringInternalized(isolate, "map")); 145 return; 146 } 147 if (value->IsSet() || value->IsWeakSet()) { 148 info.GetReturnValue().Set(toV8StringInternalized(isolate, "set")); 149 return; 150 } 151 if (value->IsMapIterator() || value->IsSetIterator()) { 152 info.GetReturnValue().Set(toV8StringInternalized(isolate, "iterator")); 153 return; 154 } 155 if (value->IsGeneratorObject()) { 156 info.GetReturnValue().Set(toV8StringInternalized(isolate, "generator")); 157 return; 158 } 159 if (value->IsNativeError()) { 160 info.GetReturnValue().Set(toV8StringInternalized(isolate, "error")); 161 return; 162 } 163 if (value->IsProxy()) { 164 info.GetReturnValue().Set(toV8StringInternalized(isolate, "proxy")); 165 return; 166 } 167 if (value->IsPromise()) { 168 info.GetReturnValue().Set(toV8StringInternalized(isolate, "promise")); 169 return; 170 } 171 std::unique_ptr<StringBuffer> subtype = 172 unwrapInspector(info)->client()->valueSubtype(value); 173 if (subtype) { 174 info.GetReturnValue().Set(toV8String(isolate, subtype->string())); 175 return; 176 } 177 } 178 179 void V8InjectedScriptHost::getInternalPropertiesCallback( 180 const v8::FunctionCallbackInfo<v8::Value>& info) { 181 if (info.Length() < 1) return; 182 183 std::unordered_set<String16> allowedProperties; 184 if (info[0]->IsBooleanObject() || info[0]->IsNumberObject() || 185 info[0]->IsStringObject() || info[0]->IsSymbolObject()) { 186 allowedProperties.insert(String16("[[PrimitiveValue]]")); 187 } else if (info[0]->IsPromise()) { 188 allowedProperties.insert(String16("[[PromiseStatus]]")); 189 allowedProperties.insert(String16("[[PromiseValue]]")); 190 } else if (info[0]->IsGeneratorObject()) { 191 allowedProperties.insert(String16("[[GeneratorStatus]]")); 192 } else if (info[0]->IsMapIterator() || info[0]->IsSetIterator()) { 193 allowedProperties.insert(String16("[[IteratorHasMore]]")); 194 allowedProperties.insert(String16("[[IteratorIndex]]")); 195 allowedProperties.insert(String16("[[IteratorKind]]")); 196 allowedProperties.insert(String16("[[Entries]]")); 197 } else if (info[0]->IsMap() || info[0]->IsWeakMap() || info[0]->IsSet() || 198 info[0]->IsWeakSet()) { 199 allowedProperties.insert(String16("[[Entries]]")); 200 } 201 if (!allowedProperties.size()) return; 202 203 v8::Isolate* isolate = info.GetIsolate(); 204 v8::Local<v8::Array> allProperties; 205 if (!unwrapInspector(info) 206 ->debugger() 207 ->internalProperties(isolate->GetCurrentContext(), info[0]) 208 .ToLocal(&allProperties) || 209 !allProperties->IsArray() || allProperties->Length() % 2 != 0) 210 return; 211 212 { 213 v8::Local<v8::Context> context = isolate->GetCurrentContext(); 214 v8::TryCatch tryCatch(isolate); 215 v8::Isolate::DisallowJavascriptExecutionScope throwJs( 216 isolate, 217 v8::Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE); 218 219 v8::Local<v8::Array> properties = v8::Array::New(isolate); 220 if (tryCatch.HasCaught()) return; 221 222 uint32_t outputIndex = 0; 223 for (uint32_t i = 0; i < allProperties->Length(); i += 2) { 224 v8::Local<v8::Value> key; 225 if (!allProperties->Get(context, i).ToLocal(&key)) continue; 226 if (tryCatch.HasCaught()) { 227 tryCatch.Reset(); 228 continue; 229 } 230 String16 keyString = toProtocolStringWithTypeCheck(key); 231 if (keyString.isEmpty() || 232 allowedProperties.find(keyString) == allowedProperties.end()) 233 continue; 234 v8::Local<v8::Value> value; 235 if (!allProperties->Get(context, i + 1).ToLocal(&value)) continue; 236 if (tryCatch.HasCaught()) { 237 tryCatch.Reset(); 238 continue; 239 } 240 createDataProperty(context, properties, outputIndex++, key); 241 createDataProperty(context, properties, outputIndex++, value); 242 } 243 info.GetReturnValue().Set(properties); 244 } 245 } 246 247 void V8InjectedScriptHost::objectHasOwnPropertyCallback( 248 const v8::FunctionCallbackInfo<v8::Value>& info) { 249 if (info.Length() < 2 || !info[0]->IsObject() || !info[1]->IsString()) return; 250 bool result = info[0] 251 .As<v8::Object>() 252 ->HasOwnProperty(info.GetIsolate()->GetCurrentContext(), 253 v8::Local<v8::String>::Cast(info[1])) 254 .FromMaybe(false); 255 info.GetReturnValue().Set(v8::Boolean::New(info.GetIsolate(), result)); 256 } 257 258 void V8InjectedScriptHost::bindCallback( 259 const v8::FunctionCallbackInfo<v8::Value>& info) { 260 if (info.Length() < 2 || !info[1]->IsString()) return; 261 InjectedScriptNative* injectedScriptNative = 262 InjectedScriptNative::fromInjectedScriptHost(info.GetIsolate(), 263 info.Holder()); 264 if (!injectedScriptNative) return; 265 266 v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext(); 267 v8::Local<v8::String> v8groupName = 268 info[1]->ToString(context).ToLocalChecked(); 269 String16 groupName = toProtocolStringWithTypeCheck(v8groupName); 270 int id = injectedScriptNative->bind(info[0], groupName); 271 info.GetReturnValue().Set(id); 272 } 273 274 void V8InjectedScriptHost::proxyTargetValueCallback( 275 const v8::FunctionCallbackInfo<v8::Value>& info) { 276 if (info.Length() != 1 || !info[0]->IsProxy()) { 277 UNREACHABLE(); 278 return; 279 } 280 v8::Local<v8::Object> target = info[0].As<v8::Proxy>(); 281 while (target->IsProxy()) 282 target = v8::Local<v8::Proxy>::Cast(target)->GetTarget(); 283 info.GetReturnValue().Set(target); 284 } 285 286 } // namespace v8_inspector 287
