christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 Google Inc. All Rights Reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include "v8.h" |
| 31 | |
| 32 | #include "accessors.h" |
| 33 | #include "api.h" |
| 34 | #include "arguments.h" |
| 35 | #include "compiler.h" |
| 36 | #include "cpu.h" |
| 37 | #include "dateparser.h" |
| 38 | #include "debug.h" |
| 39 | #include "execution.h" |
| 40 | #include "jsregexp.h" |
| 41 | #include "platform.h" |
| 42 | #include "runtime.h" |
| 43 | #include "scopeinfo.h" |
| 44 | #include "v8threads.h" |
| 45 | |
| 46 | namespace v8 { namespace internal { |
| 47 | |
| 48 | |
| 49 | #define RUNTIME_ASSERT(value) do { \ |
| 50 | if (!(value)) return IllegalOperation(); \ |
| 51 | } while (false) |
| 52 | |
| 53 | // Cast the given object to a value of the specified type and store |
| 54 | // it in a variable with the given name. If the object is not of the |
| 55 | // expected type call IllegalOperation and return. |
| 56 | #define CONVERT_CHECKED(Type, name, obj) \ |
| 57 | RUNTIME_ASSERT(obj->Is##Type()); \ |
| 58 | Type* name = Type::cast(obj); |
| 59 | |
| 60 | #define CONVERT_ARG_CHECKED(Type, name, index) \ |
| 61 | RUNTIME_ASSERT(args[index]->Is##Type()); \ |
| 62 | Handle<Type> name = args.at<Type>(index); |
| 63 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 64 | // Cast the given object to a boolean and store it in a variable with |
| 65 | // the given name. If the object is not a boolean call IllegalOperation |
| 66 | // and return. |
| 67 | #define CONVERT_BOOLEAN_CHECKED(name, obj) \ |
| 68 | RUNTIME_ASSERT(obj->IsBoolean()); \ |
| 69 | bool name = (obj)->IsTrue(); |
| 70 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 71 | // Cast the given object to a double and store it in a variable with |
| 72 | // the given name. If the object is not a number (as opposed to |
| 73 | // the number not-a-number) call IllegalOperation and return. |
| 74 | #define CONVERT_DOUBLE_CHECKED(name, obj) \ |
| 75 | RUNTIME_ASSERT(obj->IsNumber()); \ |
| 76 | double name = (obj)->Number(); |
| 77 | |
| 78 | // Call the specified converter on the object *comand store the result in |
| 79 | // a variable of the specified type with the given name. If the |
| 80 | // object is not a Number call IllegalOperation and return. |
| 81 | #define CONVERT_NUMBER_CHECKED(type, name, Type, obj) \ |
| 82 | RUNTIME_ASSERT(obj->IsNumber()); \ |
| 83 | type name = NumberTo##Type(obj); |
| 84 | |
| 85 | // Non-reentrant string buffer for efficient general use in this file. |
| 86 | static StaticResource<StringInputBuffer> string_input_buffer; |
| 87 | |
| 88 | |
| 89 | static Object* IllegalOperation() { |
| 90 | return Top::Throw(Heap::illegal_access_symbol()); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | static Object* Runtime_CloneObjectLiteralBoilerplate(Arguments args) { |
| 95 | CONVERT_CHECKED(JSObject, boilerplate, args[0]); |
| 96 | |
| 97 | #ifdef DEBUG |
| 98 | // Verify the constructor of the boilerplate is equal to the |
| 99 | // object function in the CURRENT global_context. |
| 100 | CHECK(boilerplate->map()->constructor() |
| 101 | == Top::context()->global_context()->object_function()); |
| 102 | #endif |
| 103 | return boilerplate->Copy(); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | static Object* Runtime_CreateObjectLiteralBoilerplate(Arguments args) { |
| 108 | HandleScope scope; |
| 109 | ASSERT(args.length() == 3); |
| 110 | // Copy the arguments. |
| 111 | Handle<FixedArray> literals = args.at<FixedArray>(0); |
| 112 | int literals_index = Smi::cast(args[1])->value(); |
| 113 | Handle<FixedArray> constant_properties = args.at<FixedArray>(2); |
| 114 | |
| 115 | // Create the boilerplate object for the function literal |
| 116 | Handle<JSObject> boilerplate = |
| 117 | Factory::NewJSObject(Top::object_function(), TENURED); |
| 118 | |
| 119 | { // Add the constant propeties to the boilerplate. |
| 120 | int length = constant_properties->length(); |
| 121 | OptimizedObjectForAddingMultipleProperties opt(boilerplate, true); |
| 122 | for (int index = 0; index < length; index +=2) { |
| 123 | Handle<Object> key(constant_properties->get(index+0)); |
| 124 | Handle<Object> value(constant_properties->get(index+1)); |
| 125 | uint32_t element_index = 0; |
| 126 | if (key->IsSymbol()) { |
| 127 | // If key is a symbol it is not an array element. |
| 128 | Handle<String> name(String::cast(*key)); |
| 129 | ASSERT(!name->AsArrayIndex(&element_index)); |
| 130 | SetProperty(boilerplate, name, value, NONE); |
| 131 | } else if (Array::IndexFromObject(*key, &element_index)) { |
| 132 | // Array index (uint32). |
| 133 | SetElement(boilerplate, element_index, value); |
| 134 | } else { |
| 135 | // Non-uint32 number. |
| 136 | ASSERT(key->IsNumber()); |
| 137 | double num = key->Number(); |
| 138 | char arr[100]; |
| 139 | Vector<char> buffer(arr, ARRAY_SIZE(arr)); |
| 140 | const char* str = DoubleToCString(num, buffer); |
| 141 | Handle<String> name = Factory::NewStringFromAscii(CStrVector(str)); |
| 142 | SetProperty(boilerplate, name, value, NONE); |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | // Update the functions literal and return the boilerplate. |
| 148 | literals->set(literals_index, *boilerplate); |
| 149 | |
| 150 | return *boilerplate; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | static Object* Runtime_CreateArrayLiteral(Arguments args) { |
| 155 | // Takes a FixedArray containing literals and produces |
| 156 | // JSArray with the elements matching the literals. |
| 157 | ASSERT(args.length() == 1); |
| 158 | CONVERT_CHECKED(FixedArray, literals, args[0]); |
| 159 | |
| 160 | // Retrieve the array constructor from the global context. |
| 161 | JSFunction* constructor = |
| 162 | JSFunction::cast(Top::context()->global_context()->array_function()); |
| 163 | |
| 164 | // Create the JSArray. |
| 165 | Object* object = Heap::AllocateJSObject(constructor); |
| 166 | if (object->IsFailure()) return object; |
| 167 | |
| 168 | // Copy the literals. |
| 169 | Object* elements = literals->Copy(); |
| 170 | if (elements->IsFailure()) return elements; |
| 171 | |
| 172 | // Set the elements. |
| 173 | JSArray::cast(object)->SetContent(FixedArray::cast(elements)); |
| 174 | return object; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | static Object* Runtime_ClassOf(Arguments args) { |
| 179 | NoHandleAllocation ha; |
| 180 | ASSERT(args.length() == 1); |
| 181 | Object* obj = args[0]; |
| 182 | if (!obj->IsJSObject()) return Heap::null_value(); |
| 183 | return JSObject::cast(obj)->class_name(); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | static Object* Runtime_IsInPrototypeChain(Arguments args) { |
| 188 | NoHandleAllocation ha; |
| 189 | ASSERT(args.length() == 2); |
| 190 | // See ECMA-262, section 15.3.5.3, page 88 (steps 5 - 8). |
| 191 | Object* O = args[0]; |
| 192 | Object* V = args[1]; |
| 193 | while (true) { |
| 194 | Object* prototype = V->GetPrototype(); |
| 195 | if (prototype->IsNull()) return Heap::false_value(); |
| 196 | if (O == prototype) return Heap::true_value(); |
| 197 | V = prototype; |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | |
| 202 | static Object* Runtime_IsConstructCall(Arguments args) { |
| 203 | NoHandleAllocation ha; |
| 204 | JavaScriptFrameIterator it; |
| 205 | return Heap::ToBoolean(it.frame()->IsConstructor()); |
| 206 | } |
| 207 | |
| 208 | |
| 209 | static Object* Runtime_GetBuiltins(Arguments args) { |
| 210 | NoHandleAllocation ha; |
| 211 | return Top::context()->builtins(); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | static Object* Runtime_RegExpCompile(Arguments args) { |
| 216 | HandleScope scope; // create a new handle scope |
| 217 | ASSERT(args.length() == 3); |
| 218 | CONVERT_CHECKED(JSValue, raw_re, args[0]); |
| 219 | Handle<JSValue> re(raw_re); |
| 220 | CONVERT_CHECKED(String, raw_pattern, args[1]); |
| 221 | Handle<String> pattern(raw_pattern); |
| 222 | CONVERT_CHECKED(String, raw_flags, args[2]); |
| 223 | Handle<String> flags(raw_flags); |
| 224 | return *RegExpImpl::JsreCompile(re, pattern, flags); |
| 225 | } |
| 226 | |
| 227 | |
| 228 | static Object* Runtime_CreateApiFunction(Arguments args) { |
| 229 | HandleScope scope; |
| 230 | ASSERT(args.length() == 1); |
| 231 | CONVERT_CHECKED(FunctionTemplateInfo, raw_data, args[0]); |
| 232 | Handle<FunctionTemplateInfo> data(raw_data); |
| 233 | return *Factory::CreateApiFunction(data); |
| 234 | } |
| 235 | |
| 236 | |
| 237 | static Object* Runtime_IsTemplate(Arguments args) { |
| 238 | ASSERT(args.length() == 1); |
| 239 | Object* arg = args[0]; |
| 240 | bool result = arg->IsObjectTemplateInfo() |
| 241 | || arg->IsFunctionTemplateInfo(); |
| 242 | return Heap::ToBoolean(result); |
| 243 | } |
| 244 | |
| 245 | |
| 246 | static Object* Runtime_GetTemplateField(Arguments args) { |
| 247 | ASSERT(args.length() == 2); |
| 248 | CONVERT_CHECKED(HeapObject, templ, args[0]); |
| 249 | RUNTIME_ASSERT(templ->IsStruct()); |
| 250 | CONVERT_CHECKED(Smi, field, args[1]); |
| 251 | return HeapObject::GetHeapObjectField(templ, field->value()); |
| 252 | } |
| 253 | |
| 254 | |
| 255 | static Object* ThrowRedeclarationError(const char* type, Handle<String> name) { |
| 256 | HandleScope scope; |
| 257 | Handle<Object> type_handle = Factory::NewStringFromAscii(CStrVector(type)); |
| 258 | Handle<Object> args[2] = { type_handle, name }; |
| 259 | Handle<Object> error = |
| 260 | Factory::NewTypeError("redeclaration", HandleVector(args, 2)); |
| 261 | return Top::Throw(*error); |
| 262 | } |
| 263 | |
| 264 | |
| 265 | static Object* Runtime_DeclareGlobals(Arguments args) { |
| 266 | HandleScope scope; |
| 267 | Handle<GlobalObject> global = Handle<GlobalObject>(Top::context()->global()); |
| 268 | |
| 269 | CONVERT_ARG_CHECKED(FixedArray, pairs, 0); |
| 270 | Handle<Context> context = args.at<Context>(1); |
| 271 | bool is_eval = Smi::cast(args[2])->value() == 1; |
| 272 | |
| 273 | // Compute the property attributes. According to ECMA-262, section |
| 274 | // 13, page 71, the property must be read-only and |
| 275 | // non-deletable. However, neither SpiderMonkey nor KJS creates the |
| 276 | // property as read-only, so we don't either. |
| 277 | PropertyAttributes base = is_eval ? NONE : DONT_DELETE; |
| 278 | |
| 279 | // Only optimize the object if we intend to add more than 5 properties. |
| 280 | OptimizedObjectForAddingMultipleProperties ba(global, pairs->length()/2 > 5); |
| 281 | |
| 282 | // Traverse the name/value pairs and set the properties. |
| 283 | int length = pairs->length(); |
| 284 | for (int i = 0; i < length; i += 2) { |
| 285 | HandleScope scope; |
| 286 | Handle<String> name(String::cast(pairs->get(i))); |
| 287 | Handle<Object> value(pairs->get(i + 1)); |
| 288 | |
| 289 | // We have to declare a global const property. To capture we only |
| 290 | // assign to it when evaluating the assignment for "const x = |
| 291 | // <expr>" the initial value is the hole. |
| 292 | bool is_const_property = value->IsTheHole(); |
| 293 | |
| 294 | if (value->IsUndefined() || is_const_property) { |
| 295 | // Lookup the property in the global object, and don't set the |
| 296 | // value of the variable if the property is already there. |
| 297 | LookupResult lookup; |
| 298 | global->Lookup(*name, &lookup); |
| 299 | if (lookup.IsProperty()) { |
| 300 | // Determine if the property is local by comparing the holder |
| 301 | // against the global object. The information will be used to |
| 302 | // avoid throwing re-declaration errors when declaring |
| 303 | // variables or constants that exist in the prototype chain. |
| 304 | bool is_local = (*global == lookup.holder()); |
| 305 | // Get the property attributes and determine if the property is |
| 306 | // read-only. |
| 307 | PropertyAttributes attributes = global->GetPropertyAttribute(*name); |
| 308 | bool is_read_only = (attributes & READ_ONLY) != 0; |
| 309 | if (lookup.type() == INTERCEPTOR) { |
| 310 | // If the interceptor says the property is there, we |
| 311 | // just return undefined without overwriting the property. |
| 312 | // Otherwise, we continue to setting the property. |
| 313 | if (attributes != ABSENT) { |
| 314 | // Check if the existing property conflicts with regards to const. |
| 315 | if (is_local && (is_read_only || is_const_property)) { |
| 316 | const char* type = (is_read_only) ? "const" : "var"; |
| 317 | return ThrowRedeclarationError(type, name); |
| 318 | }; |
| 319 | // The property already exists without conflicting: Go to |
| 320 | // the next declaration. |
| 321 | continue; |
| 322 | } |
| 323 | // Fall-through and introduce the absent property by using |
| 324 | // SetProperty. |
| 325 | } else { |
| 326 | if (is_local && (is_read_only || is_const_property)) { |
| 327 | const char* type = (is_read_only) ? "const" : "var"; |
| 328 | return ThrowRedeclarationError(type, name); |
| 329 | } |
| 330 | // The property already exists without conflicting: Go to |
| 331 | // the next declaration. |
| 332 | continue; |
| 333 | } |
| 334 | } |
| 335 | } else { |
| 336 | // Copy the function and update its context. Use it as value. |
| 337 | Handle<JSFunction> boilerplate = Handle<JSFunction>::cast(value); |
| 338 | Handle<JSFunction> function = |
| 339 | Factory::NewFunctionFromBoilerplate(boilerplate, context); |
| 340 | value = function; |
| 341 | } |
| 342 | |
| 343 | LookupResult lookup; |
| 344 | global->LocalLookup(*name, &lookup); |
| 345 | |
| 346 | PropertyAttributes attributes = is_const_property |
| 347 | ? static_cast<PropertyAttributes>(base | READ_ONLY) |
| 348 | : base; |
| 349 | |
| 350 | if (lookup.IsProperty()) { |
| 351 | // There's a local property that we need to overwrite because |
| 352 | // we're either declaring a function or there's an interceptor |
| 353 | // that claims the property is absent. |
| 354 | |
| 355 | // Check for conflicting re-declarations. We cannot have |
| 356 | // conflicting types in case of intercepted properties because |
| 357 | // they are absent. |
| 358 | if (lookup.type() != INTERCEPTOR && |
| 359 | (lookup.IsReadOnly() || is_const_property)) { |
| 360 | const char* type = (lookup.IsReadOnly()) ? "const" : "var"; |
| 361 | return ThrowRedeclarationError(type, name); |
| 362 | } |
| 363 | SetProperty(global, name, value, attributes); |
| 364 | } else { |
| 365 | // If a property with this name does not already exist on the |
| 366 | // global object add the property locally. We take special |
| 367 | // precautions to always add it as a local property even in case |
| 368 | // of callbacks in the prototype chain (this rules out using |
| 369 | // SetProperty). Also, we must use the handle-based version to |
| 370 | // avoid GC issues. |
| 371 | AddProperty(global, name, value, attributes); |
| 372 | } |
| 373 | } |
| 374 | // Done. |
| 375 | return Heap::undefined_value(); |
| 376 | } |
| 377 | |
| 378 | |
| 379 | static Object* Runtime_DeclareContextSlot(Arguments args) { |
| 380 | HandleScope scope; |
| 381 | ASSERT(args.length() == 5); |
| 382 | |
| 383 | // args[0] is result (TOS) |
| 384 | CONVERT_ARG_CHECKED(Context, context, 1); |
| 385 | Handle<String> name(String::cast(args[2])); |
| 386 | PropertyAttributes mode = |
| 387 | static_cast<PropertyAttributes>(Smi::cast(args[3])->value()); |
| 388 | ASSERT(mode == READ_ONLY || mode == NONE); |
| 389 | Handle<Object> initial_value(args[4]); |
| 390 | |
| 391 | // Declarations are always done in the function context. |
| 392 | context = Handle<Context>(context->fcontext()); |
| 393 | |
| 394 | int index; |
| 395 | PropertyAttributes attributes; |
| 396 | ContextLookupFlags flags = DONT_FOLLOW_CHAINS; |
| 397 | Handle<Object> context_obj = |
| 398 | context->Lookup(name, flags, &index, &attributes); |
| 399 | |
| 400 | if (attributes != ABSENT) { |
| 401 | // The name was declared before; check for conflicting |
| 402 | // re-declarations: This is similar to the code in parser.cc in |
| 403 | // the AstBuildingParser::Declare function. |
| 404 | if (((attributes & READ_ONLY) != 0) || (mode == READ_ONLY)) { |
| 405 | // Functions are not read-only. |
| 406 | ASSERT(mode != READ_ONLY || initial_value->IsTheHole()); |
| 407 | const char* type = ((attributes & READ_ONLY) != 0) ? "const" : "var"; |
| 408 | return ThrowRedeclarationError(type, name); |
| 409 | } |
| 410 | |
| 411 | // Initialize it if necessary. |
| 412 | if (*initial_value != NULL) { |
| 413 | if (index >= 0) { |
| 414 | // The variable or constant context slot should always be in |
| 415 | // the function context; not in any outer context nor in the |
| 416 | // arguments object. |
| 417 | ASSERT(context_obj.is_identical_to(context)); |
| 418 | if (((attributes & READ_ONLY) == 0) || |
| 419 | context->get(index)->IsTheHole()) { |
| 420 | context->set(index, *initial_value); |
| 421 | } |
| 422 | } else { |
| 423 | // Slow case: The property is not in the FixedArray part of the context. |
| 424 | Handle<JSObject> context_ext = Handle<JSObject>::cast(context_obj); |
| 425 | SetProperty(context_ext, name, initial_value, mode); |
| 426 | } |
| 427 | } |
| 428 | return args[0]; // return TOS |
| 429 | } |
| 430 | |
| 431 | // The property is not in the function context. It needs to be "declared" |
| 432 | // in the function context's extension context, or in the global context. |
| 433 | Handle<JSObject> context_ext; |
| 434 | if (context->extension() != NULL) { |
| 435 | // The function context's extension context exists - use it. |
| 436 | context_ext = Handle<JSObject>(context->extension()); |
| 437 | } else { |
| 438 | // The function context's extension context does not exists - allocate it. |
| 439 | context_ext = Factory::NewJSObject(Top::context_extension_function()); |
| 440 | // And store it in the extension slot. |
| 441 | context->set_extension(*context_ext); |
| 442 | } |
| 443 | ASSERT(*context_ext != NULL); |
| 444 | |
| 445 | // Declare the property by setting it to the initial value if provided, |
| 446 | // or undefined, and use the correct mode (e.g. READ_ONLY attribute for |
| 447 | // constant declarations). |
| 448 | ASSERT(!context_ext->HasLocalProperty(*name)); |
| 449 | Handle<Object> value(Heap::undefined_value()); |
| 450 | if (*initial_value != NULL) value = initial_value; |
| 451 | SetProperty(context_ext, name, value, mode); |
| 452 | ASSERT(context_ext->GetLocalPropertyAttribute(*name) == mode); |
| 453 | return args[0]; // return TOS |
| 454 | } |
| 455 | |
| 456 | |
| 457 | static Object* Runtime_InitializeVarGlobal(Arguments args) { |
| 458 | NoHandleAllocation nha; |
| 459 | |
| 460 | // Determine if we need to assign to the variable if it already |
| 461 | // exists (based on the number of arguments). |
| 462 | RUNTIME_ASSERT(args.length() == 1 || args.length() == 2); |
| 463 | bool assign = args.length() == 2; |
| 464 | |
| 465 | CONVERT_ARG_CHECKED(String, name, 0); |
| 466 | GlobalObject* global = Top::context()->global(); |
| 467 | |
| 468 | // According to ECMA-262, section 12.2, page 62, the property must |
| 469 | // not be deletable. |
| 470 | PropertyAttributes attributes = DONT_DELETE; |
| 471 | |
| 472 | // Lookup the property locally in the global object. If it isn't |
| 473 | // there, we add the property and take special precautions to always |
| 474 | // add it as a local property even in case of callbacks in the |
| 475 | // prototype chain (this rules out using SetProperty). |
| 476 | LookupResult lookup; |
| 477 | global->LocalLookup(*name, &lookup); |
| 478 | if (!lookup.IsProperty()) { |
| 479 | Object* value = (assign) ? args[1] : Heap::undefined_value(); |
| 480 | return global->AddProperty(*name, value, attributes); |
| 481 | } |
| 482 | |
| 483 | // Determine if this is a redeclaration of something read-only. |
| 484 | if (lookup.IsReadOnly()) { |
| 485 | return ThrowRedeclarationError("const", name); |
| 486 | } |
| 487 | |
| 488 | // Determine if this is a redeclaration of an intercepted read-only |
| 489 | // property and figure out if the property exists at all. |
| 490 | bool found = true; |
| 491 | PropertyType type = lookup.type(); |
| 492 | if (type == INTERCEPTOR) { |
| 493 | PropertyAttributes intercepted = global->GetPropertyAttribute(*name); |
| 494 | if (intercepted == ABSENT) { |
| 495 | // The interceptor claims the property isn't there. We need to |
| 496 | // make sure to introduce it. |
| 497 | found = false; |
| 498 | } else if ((intercepted & READ_ONLY) != 0) { |
| 499 | // The property is present, but read-only. Since we're trying to |
| 500 | // overwrite it with a variable declaration we must throw a |
| 501 | // re-declaration error. |
| 502 | return ThrowRedeclarationError("const", name); |
| 503 | } |
| 504 | // Restore global object from context (in case of GC). |
| 505 | global = Top::context()->global(); |
| 506 | } |
| 507 | |
| 508 | if (found && !assign) { |
| 509 | // The global property is there and we're not assigning any value |
| 510 | // to it. Just return. |
| 511 | return Heap::undefined_value(); |
| 512 | } |
| 513 | |
| 514 | // Assign the value (or undefined) to the property. |
| 515 | Object* value = (assign) ? args[1] : Heap::undefined_value(); |
| 516 | return global->SetProperty(&lookup, *name, value, attributes); |
| 517 | } |
| 518 | |
| 519 | |
| 520 | static Object* Runtime_InitializeConstGlobal(Arguments args) { |
| 521 | // All constants are declared with an initial value. The name |
| 522 | // of the constant is the first argument and the initial value |
| 523 | // is the second. |
| 524 | RUNTIME_ASSERT(args.length() == 2); |
| 525 | CONVERT_ARG_CHECKED(String, name, 0); |
| 526 | Handle<Object> value = args.at<Object>(1); |
| 527 | |
| 528 | // Get the current global object from top. |
| 529 | GlobalObject* global = Top::context()->global(); |
| 530 | |
| 531 | // According to ECMA-262, section 12.2, page 62, the property must |
| 532 | // not be deletable. Since it's a const, it must be READ_ONLY too. |
| 533 | PropertyAttributes attributes = |
| 534 | static_cast<PropertyAttributes>(DONT_DELETE | READ_ONLY); |
| 535 | |
| 536 | // Lookup the property locally in the global object. If it isn't |
| 537 | // there, we add the property and take special precautions to always |
| 538 | // add it as a local property even in case of callbacks in the |
| 539 | // prototype chain (this rules out using SetProperty). |
| 540 | LookupResult lookup; |
| 541 | global->LocalLookup(*name, &lookup); |
| 542 | if (!lookup.IsProperty()) { |
| 543 | return global->AddProperty(*name, *value, attributes); |
| 544 | } |
| 545 | |
| 546 | // Determine if this is a redeclaration of something not |
| 547 | // read-only. In case the result is hidden behind an interceptor we |
| 548 | // need to ask it for the property attributes. |
| 549 | if (!lookup.IsReadOnly()) { |
| 550 | if (lookup.type() != INTERCEPTOR) { |
| 551 | return ThrowRedeclarationError("var", name); |
| 552 | } |
| 553 | |
| 554 | PropertyAttributes intercepted = global->GetPropertyAttribute(*name); |
| 555 | |
| 556 | // Throw re-declaration error if the intercepted property is present |
| 557 | // but not read-only. |
| 558 | if (intercepted != ABSENT && (intercepted & READ_ONLY) == 0) { |
| 559 | return ThrowRedeclarationError("var", name); |
| 560 | } |
| 561 | |
| 562 | // Restore global object from context (in case of GC) and continue |
| 563 | // with setting the value because the property is either absent or |
| 564 | // read-only. We also have to do redo the lookup. |
| 565 | global = Top::context()->global(); |
| 566 | |
| 567 | // BUG 1213579: Handle the case where we have to set a read-only |
| 568 | // property through an interceptor and only do it if it's |
| 569 | // uninitialized, e.g. the hole. Nirk... |
| 570 | global->SetProperty(*name, *value, attributes); |
| 571 | return *value; |
| 572 | } |
| 573 | |
| 574 | // Set the value, but only we're assigning the initial value to a |
| 575 | // constant. For now, we determine this by checking if the |
| 576 | // current value is the hole. |
| 577 | PropertyType type = lookup.type(); |
| 578 | if (type == FIELD) { |
| 579 | FixedArray* properties = global->properties(); |
| 580 | int index = lookup.GetFieldIndex(); |
| 581 | if (properties->get(index)->IsTheHole()) { |
| 582 | properties->set(index, *value); |
| 583 | } |
| 584 | } else if (type == NORMAL) { |
| 585 | Dictionary* dictionary = global->property_dictionary(); |
| 586 | int entry = lookup.GetDictionaryEntry(); |
| 587 | if (dictionary->ValueAt(entry)->IsTheHole()) { |
| 588 | dictionary->ValueAtPut(entry, *value); |
| 589 | } |
| 590 | } else { |
| 591 | // Ignore re-initialization of constants that have already been |
| 592 | // assigned a function value. |
| 593 | ASSERT(lookup.IsReadOnly() && type == CONSTANT_FUNCTION); |
| 594 | } |
| 595 | |
| 596 | // Use the set value as the result of the operation. |
| 597 | return *value; |
| 598 | } |
| 599 | |
| 600 | |
| 601 | static Object* Runtime_InitializeConstContextSlot(Arguments args) { |
| 602 | HandleScope scope; |
| 603 | ASSERT(args.length() == 3); |
| 604 | |
| 605 | Handle<Object> value(args[0]); |
| 606 | ASSERT(!value->IsTheHole()); |
| 607 | CONVERT_ARG_CHECKED(Context, context, 1); |
| 608 | Handle<String> name(String::cast(args[2])); |
| 609 | |
| 610 | // Initializations are always done in the function context. |
| 611 | context = Handle<Context>(context->fcontext()); |
| 612 | |
| 613 | int index; |
| 614 | PropertyAttributes attributes; |
| 615 | ContextLookupFlags flags = DONT_FOLLOW_CHAINS; |
| 616 | Handle<Object> context_obj = |
| 617 | context->Lookup(name, flags, &index, &attributes); |
| 618 | |
| 619 | // The property should always be present. It is always declared |
| 620 | // before being initialized through DeclareContextSlot. |
| 621 | ASSERT(attributes != ABSENT && (attributes & READ_ONLY) != 0); |
| 622 | |
| 623 | // If the slot is in the context, we set it but only if it hasn't |
| 624 | // been set before. |
| 625 | if (index >= 0) { |
| 626 | // The constant context slot should always be in the function |
| 627 | // context; not in any outer context nor in the arguments object. |
| 628 | ASSERT(context_obj.is_identical_to(context)); |
| 629 | if (context->get(index)->IsTheHole()) { |
| 630 | context->set(index, *value); |
| 631 | } |
| 632 | return *value; |
| 633 | } |
| 634 | |
| 635 | // Otherwise, the slot must be in a JS object extension. |
| 636 | Handle<JSObject> context_ext(JSObject::cast(*context_obj)); |
| 637 | |
| 638 | // We must initialize the value only if it wasn't initialized |
| 639 | // before, e.g. for const declarations in a loop. The property has |
| 640 | // the hole value if it wasn't initialized yet. NOTE: We cannot use |
| 641 | // GetProperty() to get the current value as it 'unholes' the value. |
| 642 | LookupResult lookup; |
| 643 | context_ext->LocalLookupRealNamedProperty(*name, &lookup); |
| 644 | ASSERT(lookup.IsProperty()); // the property was declared |
| 645 | ASSERT(lookup.IsReadOnly()); // and it was declared as read-only |
| 646 | |
| 647 | PropertyType type = lookup.type(); |
| 648 | if (type == FIELD) { |
| 649 | FixedArray* properties = context_ext->properties(); |
| 650 | int index = lookup.GetFieldIndex(); |
| 651 | if (properties->get(index)->IsTheHole()) { |
| 652 | properties->set(index, *value); |
| 653 | } |
| 654 | } else if (type == NORMAL) { |
| 655 | Dictionary* dictionary = context_ext->property_dictionary(); |
| 656 | int entry = lookup.GetDictionaryEntry(); |
| 657 | if (dictionary->ValueAt(entry)->IsTheHole()) { |
| 658 | dictionary->ValueAtPut(entry, *value); |
| 659 | } |
| 660 | } else { |
| 661 | // We should not reach here. Any real, named property should be |
| 662 | // either a field or a dictionary slot. |
| 663 | UNREACHABLE(); |
| 664 | } |
| 665 | return *value; |
| 666 | } |
| 667 | |
| 668 | |
| 669 | static Object* Runtime_RegExpExec(Arguments args) { |
| 670 | HandleScope scope; |
| 671 | ASSERT(args.length() == 3); |
| 672 | CONVERT_CHECKED(JSValue, raw_regexp, args[0]); |
| 673 | Handle<JSValue> regexp(raw_regexp); |
| 674 | CONVERT_CHECKED(String, raw_subject, args[1]); |
| 675 | Handle<String> subject(raw_subject); |
| 676 | Handle<Object> index(args[2]); |
| 677 | ASSERT(index->IsNumber()); |
| 678 | return *RegExpImpl::JsreExec(regexp, subject, index); |
| 679 | } |
| 680 | |
| 681 | |
| 682 | static Object* Runtime_RegExpExecGlobal(Arguments args) { |
| 683 | HandleScope scope; |
| 684 | ASSERT(args.length() == 2); |
| 685 | CONVERT_CHECKED(JSValue, raw_regexp, args[0]); |
| 686 | Handle<JSValue> regexp(raw_regexp); |
| 687 | CONVERT_CHECKED(String, raw_subject, args[1]); |
| 688 | Handle<String> subject(raw_subject); |
| 689 | return *RegExpImpl::JsreExecGlobal(regexp, subject); |
| 690 | } |
| 691 | |
| 692 | |
| 693 | static Object* Runtime_MaterializeRegExpLiteral(Arguments args) { |
| 694 | HandleScope scope; |
| 695 | ASSERT(args.length() == 4); |
| 696 | CONVERT_ARG_CHECKED(FixedArray, literals, 0); |
| 697 | int index = Smi::cast(args[1])->value(); |
| 698 | Handle<String> pattern = args.at<String>(2); |
| 699 | Handle<String> flags = args.at<String>(3); |
| 700 | |
| 701 | // Compute the regular expression literal. |
| 702 | bool has_pending_exception; |
| 703 | Handle<Object> regexp = |
| 704 | RegExpImpl::CreateRegExpLiteral(pattern, flags, &has_pending_exception); |
| 705 | if (has_pending_exception) { |
| 706 | ASSERT(Top::has_pending_exception()); |
| 707 | return Failure::Exception(); |
| 708 | } |
| 709 | literals->set(index, *regexp); |
| 710 | return *regexp; |
| 711 | } |
| 712 | |
| 713 | |
| 714 | static Object* Runtime_FunctionGetName(Arguments args) { |
| 715 | NoHandleAllocation ha; |
| 716 | ASSERT(args.length() == 1); |
| 717 | |
| 718 | CONVERT_CHECKED(JSFunction, f, args[0]); |
| 719 | return f->shared()->name(); |
| 720 | } |
| 721 | |
| 722 | |
| 723 | static Object* Runtime_FunctionGetScript(Arguments args) { |
| 724 | HandleScope scope; |
| 725 | ASSERT(args.length() == 1); |
| 726 | |
| 727 | CONVERT_CHECKED(JSFunction, fun, args[0]); |
| 728 | Handle<Object> script = Handle<Object>(fun->shared()->script()); |
| 729 | if (!script->IsScript()) return Heap::undefined_value(); |
| 730 | |
| 731 | return *GetScriptWrapper(Handle<Script>::cast(script)); |
| 732 | } |
| 733 | |
| 734 | |
| 735 | static Object* Runtime_FunctionGetSourceCode(Arguments args) { |
| 736 | NoHandleAllocation ha; |
| 737 | ASSERT(args.length() == 1); |
| 738 | |
| 739 | CONVERT_CHECKED(JSFunction, f, args[0]); |
| 740 | return f->shared()->GetSourceCode(); |
| 741 | } |
| 742 | |
| 743 | |
| 744 | static Object* Runtime_FunctionGetScriptSourcePosition(Arguments args) { |
| 745 | NoHandleAllocation ha; |
| 746 | ASSERT(args.length() == 1); |
| 747 | |
| 748 | CONVERT_CHECKED(JSFunction, fun, args[0]); |
| 749 | int pos = fun->shared()->start_position(); |
| 750 | return Smi::FromInt(pos); |
| 751 | } |
| 752 | |
| 753 | |
| 754 | static Object* Runtime_FunctionSetInstanceClassName(Arguments args) { |
| 755 | NoHandleAllocation ha; |
| 756 | ASSERT(args.length() == 2); |
| 757 | |
| 758 | CONVERT_CHECKED(JSFunction, fun, args[0]); |
| 759 | CONVERT_CHECKED(String, name, args[1]); |
| 760 | fun->SetInstanceClassName(name); |
| 761 | return Heap::undefined_value(); |
| 762 | } |
| 763 | |
| 764 | |
| 765 | static Object* Runtime_FunctionSetLength(Arguments args) { |
| 766 | NoHandleAllocation ha; |
| 767 | ASSERT(args.length() == 2); |
| 768 | |
| 769 | CONVERT_CHECKED(JSFunction, fun, args[0]); |
| 770 | CONVERT_CHECKED(Smi, length, args[1]); |
| 771 | fun->shared()->set_length(length->value()); |
| 772 | return length; |
| 773 | } |
| 774 | |
| 775 | |
| 776 | static Object* Runtime_FunctionSetPrototype(Arguments args) { |
| 777 | HandleScope scope; |
| 778 | ASSERT(args.length() == 2); |
| 779 | |
| 780 | CONVERT_CHECKED(JSFunction, fun, args[0]); |
| 781 | Accessors::FunctionSetPrototype(fun, args[1], NULL); |
| 782 | return args[0]; // return TOS |
| 783 | } |
| 784 | |
| 785 | |
| 786 | static Object* Runtime_SetCode(Arguments args) { |
| 787 | HandleScope scope; |
| 788 | ASSERT(args.length() == 2); |
| 789 | |
| 790 | CONVERT_CHECKED(JSFunction, raw_target, args[0]); |
| 791 | Handle<JSFunction> target(raw_target); |
| 792 | Handle<Object> code = args.at<Object>(1); |
| 793 | |
| 794 | Handle<Context> context(target->context()); |
| 795 | |
| 796 | if (!code->IsNull()) { |
| 797 | RUNTIME_ASSERT(code->IsJSFunction()); |
| 798 | Handle<JSFunction> fun = Handle<JSFunction>::cast(code); |
| 799 | SetExpectedNofProperties(target, fun->shared()->expected_nof_properties()); |
| 800 | if (!fun->is_compiled() && !CompileLazy(fun, KEEP_EXCEPTION)) { |
| 801 | return Failure::Exception(); |
| 802 | } |
| 803 | // Set the code, formal parameter count, and the length of the target |
| 804 | // function. |
| 805 | target->set_code(fun->code()); |
| 806 | target->shared()->set_length(fun->shared()->length()); |
| 807 | target->shared()->set_formal_parameter_count( |
| 808 | fun->shared()->formal_parameter_count()); |
| 809 | context = Handle<Context>(fun->context()); |
| 810 | |
| 811 | // Make sure we get a fresh copy of the literal vector to avoid |
| 812 | // cross context contamination. |
| 813 | int number_of_literals = fun->literals()->length(); |
| 814 | if (number_of_literals > 0) { |
| 815 | Handle<FixedArray> literals = |
| 816 | Factory::NewFixedArray(number_of_literals, TENURED); |
| 817 | target->set_literals(*literals); |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | target->set_context(*context); |
| 822 | return *target; |
| 823 | } |
| 824 | |
| 825 | |
| 826 | static Object* CharCodeAt(String* subject, Object* index) { |
| 827 | uint32_t i = 0; |
| 828 | if (!Array::IndexFromObject(index, &i)) |
| 829 | return Heap::nan_value(); |
| 830 | // Flatten the string. If someone wants to get a char at an index |
| 831 | // in a cons string, it is likely that more indices will be |
| 832 | // accessed. |
| 833 | subject->TryFlatten(); |
| 834 | if (i >= static_cast<uint32_t>(subject->length())) |
| 835 | return Heap::nan_value(); |
| 836 | return Smi::FromInt(subject->Get(i)); |
| 837 | } |
| 838 | |
| 839 | |
| 840 | static Object* Runtime_StringCharCodeAt(Arguments args) { |
| 841 | NoHandleAllocation ha; |
| 842 | ASSERT(args.length() == 2); |
| 843 | |
| 844 | CONVERT_CHECKED(String, subject, args[0]); |
| 845 | Object* index = args[1]; |
| 846 | return CharCodeAt(subject, index); |
| 847 | } |
| 848 | |
| 849 | |
| 850 | static Object* Runtime_CharFromCode(Arguments args) { |
| 851 | NoHandleAllocation ha; |
| 852 | ASSERT(args.length() == 1); |
| 853 | uint32_t code; |
| 854 | if (Array::IndexFromObject(args[0], &code)) { |
| 855 | if (code <= 0xffff) { |
| 856 | return Heap::LookupSingleCharacterStringFromCode(code); |
| 857 | } |
| 858 | } |
| 859 | return Heap::empty_string(); |
| 860 | } |
| 861 | |
| 862 | |
| 863 | static inline void ComputeKMPNextTable(String* pattern, int next_table[]) { |
| 864 | int i = 0; |
| 865 | int j = -1; |
| 866 | next_table[0] = -1; |
| 867 | |
| 868 | Access<StringInputBuffer> buffer(&string_input_buffer); |
| 869 | buffer->Reset(pattern); |
| 870 | int length = pattern->length(); |
| 871 | uint16_t p = buffer->GetNext(); |
| 872 | while (i < length - 1) { |
| 873 | while (j > -1 && p != pattern->Get(j)) { |
| 874 | j = next_table[j]; |
| 875 | } |
| 876 | i++; |
| 877 | j++; |
| 878 | p = buffer->GetNext(); |
| 879 | if (p == pattern->Get(j)) { |
| 880 | next_table[i] = next_table[j]; |
| 881 | } else { |
| 882 | next_table[i] = j; |
| 883 | } |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | |
| 888 | static Object* Runtime_StringIndexOf(Arguments args) { |
| 889 | NoHandleAllocation ha; |
| 890 | ASSERT(args.length() == 3); |
| 891 | |
| 892 | CONVERT_CHECKED(String, sub, args[0]); |
| 893 | CONVERT_CHECKED(String, pat, args[1]); |
| 894 | Object* index = args[2]; |
| 895 | |
| 896 | int subject_length = sub->length(); |
| 897 | int pattern_length = pat->length(); |
| 898 | |
| 899 | sub->TryFlatten(); |
| 900 | pat->TryFlatten(); |
| 901 | |
| 902 | uint32_t start_index; |
| 903 | if (!Array::IndexFromObject(index, &start_index)) return Smi::FromInt(-1); |
| 904 | if (pattern_length == 0) return Smi::FromInt(start_index); |
| 905 | |
| 906 | // Searching for one specific character is common. For one |
| 907 | // character patterns the KMP algorithm is guaranteed to slow down |
| 908 | // the search, so we just run through the subject string. |
| 909 | if (pattern_length == 1) { |
| 910 | uint16_t pattern_char = pat->Get(0); |
| 911 | for (int i = start_index; i < subject_length; i++) { |
| 912 | if (sub->Get(i) == pattern_char) { |
| 913 | return Smi::FromInt(i); |
| 914 | } |
| 915 | } |
| 916 | return Smi::FromInt(-1); |
| 917 | } |
| 918 | |
| 919 | // For patterns with a length larger than one character we use the KMP |
| 920 | // algorithm. |
| 921 | // |
| 922 | // Compute the 'next' table. |
| 923 | int* next_table = NewArray<int>(pattern_length); |
| 924 | ComputeKMPNextTable(pat, next_table); |
| 925 | // Search using the 'next' table. |
| 926 | int pattern_index = 0; |
| 927 | // We would like to use StringInputBuffer here, but it does not have |
| 928 | // the ability to start anywhere but the first character of a |
| 929 | // string. It would be nice to have efficient forward-seeking |
| 930 | // support on StringInputBuffers. |
| 931 | int subject_index = start_index; |
| 932 | while (subject_index < subject_length) { |
| 933 | uint16_t subject_char = sub->Get(subject_index); |
| 934 | while (pattern_index > -1 && pat->Get(pattern_index) != subject_char) { |
| 935 | pattern_index = next_table[pattern_index]; |
| 936 | } |
| 937 | pattern_index++; |
| 938 | subject_index++; |
| 939 | if (pattern_index >= pattern_length) { |
| 940 | DeleteArray(next_table); |
| 941 | return Smi::FromInt(subject_index - pattern_index); |
| 942 | } |
| 943 | } |
| 944 | DeleteArray(next_table); |
| 945 | return Smi::FromInt(-1); |
| 946 | } |
| 947 | |
| 948 | |
| 949 | static Object* Runtime_StringLastIndexOf(Arguments args) { |
| 950 | NoHandleAllocation ha; |
| 951 | ASSERT(args.length() == 3); |
| 952 | |
| 953 | CONVERT_CHECKED(String, sub, args[0]); |
| 954 | CONVERT_CHECKED(String, pat, args[1]); |
| 955 | Object* index = args[2]; |
| 956 | |
| 957 | sub->TryFlatten(); |
| 958 | pat->TryFlatten(); |
| 959 | |
| 960 | uint32_t start_index; |
| 961 | if (!Array::IndexFromObject(index, &start_index)) return Smi::FromInt(-1); |
| 962 | |
| 963 | uint32_t pattern_length = pat->length(); |
| 964 | uint32_t sub_length = sub->length(); |
| 965 | |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 966 | if (start_index + pattern_length > sub_length) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 967 | start_index = sub_length - pattern_length; |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 968 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 969 | |
| 970 | for (int i = start_index; i >= 0; i--) { |
| 971 | bool found = true; |
| 972 | for (uint32_t j = 0; j < pattern_length; j++) { |
| 973 | if (sub->Get(i + j) != pat->Get(j)) { |
| 974 | found = false; |
| 975 | break; |
| 976 | } |
| 977 | } |
| 978 | if (found) return Smi::FromInt(i); |
| 979 | } |
| 980 | |
| 981 | return Smi::FromInt(-1); |
| 982 | } |
| 983 | |
| 984 | |
| 985 | static Object* Runtime_StringLocaleCompare(Arguments args) { |
| 986 | NoHandleAllocation ha; |
| 987 | ASSERT(args.length() == 2); |
| 988 | |
| 989 | CONVERT_CHECKED(String, str1, args[0]); |
| 990 | CONVERT_CHECKED(String, str2, args[1]); |
| 991 | |
| 992 | if (str1 == str2) return Smi::FromInt(0); // Equal. |
| 993 | int str1_length = str1->length(); |
| 994 | int str2_length = str2->length(); |
| 995 | |
| 996 | // Decide trivial cases without flattening. |
| 997 | if (str1_length == 0) { |
| 998 | if (str2_length == 0) return Smi::FromInt(0); // Equal. |
| 999 | return Smi::FromInt(-str2_length); |
| 1000 | } else { |
| 1001 | if (str2_length == 0) return Smi::FromInt(str1_length); |
| 1002 | } |
| 1003 | |
| 1004 | int end = str1_length < str2_length ? str1_length : str2_length; |
| 1005 | |
| 1006 | // No need to flatten if we are going to find the answer on the first |
| 1007 | // character. At this point we know there is at least one character |
| 1008 | // in each string, due to the trivial case handling above. |
| 1009 | int d = str1->Get(0) - str2->Get(0); |
| 1010 | if (d != 0) return Smi::FromInt(d); |
| 1011 | |
| 1012 | str1->TryFlatten(); |
| 1013 | str2->TryFlatten(); |
| 1014 | |
| 1015 | static StringInputBuffer buf1; |
| 1016 | static StringInputBuffer buf2; |
| 1017 | |
| 1018 | buf1.Reset(str1); |
| 1019 | buf2.Reset(str2); |
| 1020 | |
| 1021 | for (int i = 0; i < end; i++) { |
| 1022 | uint16_t char1 = buf1.GetNext(); |
| 1023 | uint16_t char2 = buf2.GetNext(); |
| 1024 | if (char1 != char2) return Smi::FromInt(char1 - char2); |
| 1025 | } |
| 1026 | |
| 1027 | return Smi::FromInt(str1_length - str2_length); |
| 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | static Object* Runtime_StringSlice(Arguments args) { |
| 1032 | NoHandleAllocation ha; |
| 1033 | ASSERT(args.length() == 3); |
| 1034 | |
| 1035 | CONVERT_CHECKED(String, value, args[0]); |
| 1036 | CONVERT_DOUBLE_CHECKED(from_number, args[1]); |
| 1037 | CONVERT_DOUBLE_CHECKED(to_number, args[2]); |
| 1038 | |
| 1039 | int start = FastD2I(from_number); |
| 1040 | int end = FastD2I(to_number); |
| 1041 | |
| 1042 | RUNTIME_ASSERT(end >= start); |
| 1043 | RUNTIME_ASSERT(start >= 0); |
| 1044 | RUNTIME_ASSERT(end <= value->length()); |
| 1045 | return value->Slice(start, end); |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | static Object* Runtime_NumberToRadixString(Arguments args) { |
| 1050 | NoHandleAllocation ha; |
| 1051 | ASSERT(args.length() == 2); |
| 1052 | |
| 1053 | CONVERT_DOUBLE_CHECKED(value, args[0]); |
| 1054 | if (isnan(value)) { |
| 1055 | return Heap::AllocateStringFromAscii(CStrVector("NaN")); |
| 1056 | } |
| 1057 | if (isinf(value)) { |
| 1058 | if (value < 0) { |
| 1059 | return Heap::AllocateStringFromAscii(CStrVector("-Infinity")); |
| 1060 | } |
| 1061 | return Heap::AllocateStringFromAscii(CStrVector("Infinity")); |
| 1062 | } |
| 1063 | CONVERT_DOUBLE_CHECKED(radix_number, args[1]); |
| 1064 | int radix = FastD2I(radix_number); |
| 1065 | RUNTIME_ASSERT(2 <= radix && radix <= 36); |
| 1066 | char* str = DoubleToRadixCString(value, radix); |
| 1067 | Object* result = Heap::AllocateStringFromAscii(CStrVector(str)); |
| 1068 | DeleteArray(str); |
| 1069 | return result; |
| 1070 | } |
| 1071 | |
| 1072 | |
| 1073 | static Object* Runtime_NumberToFixed(Arguments args) { |
| 1074 | NoHandleAllocation ha; |
| 1075 | ASSERT(args.length() == 2); |
| 1076 | |
| 1077 | CONVERT_DOUBLE_CHECKED(value, args[0]); |
| 1078 | if (isnan(value)) { |
| 1079 | return Heap::AllocateStringFromAscii(CStrVector("NaN")); |
| 1080 | } |
| 1081 | if (isinf(value)) { |
| 1082 | if (value < 0) { |
| 1083 | return Heap::AllocateStringFromAscii(CStrVector("-Infinity")); |
| 1084 | } |
| 1085 | return Heap::AllocateStringFromAscii(CStrVector("Infinity")); |
| 1086 | } |
| 1087 | CONVERT_DOUBLE_CHECKED(f_number, args[1]); |
| 1088 | int f = FastD2I(f_number); |
| 1089 | RUNTIME_ASSERT(f >= 0); |
| 1090 | char* str = DoubleToFixedCString(value, f); |
| 1091 | Object* res = Heap::AllocateStringFromAscii(CStrVector(str)); |
| 1092 | DeleteArray(str); |
| 1093 | return res; |
| 1094 | } |
| 1095 | |
| 1096 | |
| 1097 | static Object* Runtime_NumberToExponential(Arguments args) { |
| 1098 | NoHandleAllocation ha; |
| 1099 | ASSERT(args.length() == 2); |
| 1100 | |
| 1101 | CONVERT_DOUBLE_CHECKED(value, args[0]); |
| 1102 | if (isnan(value)) { |
| 1103 | return Heap::AllocateStringFromAscii(CStrVector("NaN")); |
| 1104 | } |
| 1105 | if (isinf(value)) { |
| 1106 | if (value < 0) { |
| 1107 | return Heap::AllocateStringFromAscii(CStrVector("-Infinity")); |
| 1108 | } |
| 1109 | return Heap::AllocateStringFromAscii(CStrVector("Infinity")); |
| 1110 | } |
| 1111 | CONVERT_DOUBLE_CHECKED(f_number, args[1]); |
| 1112 | int f = FastD2I(f_number); |
| 1113 | RUNTIME_ASSERT(f >= -1 && f <= 20); |
| 1114 | char* str = DoubleToExponentialCString(value, f); |
| 1115 | Object* res = Heap::AllocateStringFromAscii(CStrVector(str)); |
| 1116 | DeleteArray(str); |
| 1117 | return res; |
| 1118 | } |
| 1119 | |
| 1120 | |
| 1121 | static Object* Runtime_NumberToPrecision(Arguments args) { |
| 1122 | NoHandleAllocation ha; |
| 1123 | ASSERT(args.length() == 2); |
| 1124 | |
| 1125 | CONVERT_DOUBLE_CHECKED(value, args[0]); |
| 1126 | if (isnan(value)) { |
| 1127 | return Heap::AllocateStringFromAscii(CStrVector("NaN")); |
| 1128 | } |
| 1129 | if (isinf(value)) { |
| 1130 | if (value < 0) { |
| 1131 | return Heap::AllocateStringFromAscii(CStrVector("-Infinity")); |
| 1132 | } |
| 1133 | return Heap::AllocateStringFromAscii(CStrVector("Infinity")); |
| 1134 | } |
| 1135 | CONVERT_DOUBLE_CHECKED(f_number, args[1]); |
| 1136 | int f = FastD2I(f_number); |
| 1137 | RUNTIME_ASSERT(f >= 1 && f <= 21); |
| 1138 | char* str = DoubleToPrecisionCString(value, f); |
| 1139 | Object* res = Heap::AllocateStringFromAscii(CStrVector(str)); |
| 1140 | DeleteArray(str); |
| 1141 | return res; |
| 1142 | } |
| 1143 | |
| 1144 | |
| 1145 | // Returns a single character string where first character equals |
| 1146 | // string->Get(index). |
| 1147 | static Object* GetCharAt(String* string, uint32_t index) { |
| 1148 | if (index < static_cast<uint32_t>(string->length())) { |
| 1149 | string->TryFlatten(); |
| 1150 | return Heap::LookupSingleCharacterStringFromCode(string->Get(index)); |
| 1151 | } |
| 1152 | return *Execution::CharAt(Handle<String>(string), index); |
| 1153 | } |
| 1154 | |
| 1155 | |
| 1156 | Object* Runtime::GetElementOrCharAt(Handle<Object> object, uint32_t index) { |
| 1157 | // Handle [] indexing on Strings |
| 1158 | if (object->IsString()) { |
| 1159 | Object* result = GetCharAt(String::cast(*object), index); |
| 1160 | if (!result->IsUndefined()) return result; |
| 1161 | } |
| 1162 | |
| 1163 | // Handle [] indexing on String objects |
| 1164 | if (object->IsStringObjectWithCharacterAt(index)) { |
| 1165 | JSValue* js_value = JSValue::cast(*object); |
| 1166 | Object* result = GetCharAt(String::cast(js_value->value()), index); |
| 1167 | if (!result->IsUndefined()) return result; |
| 1168 | } |
| 1169 | |
| 1170 | if (object->IsString() || object->IsNumber() || object->IsBoolean()) { |
| 1171 | Object* prototype = object->GetPrototype(); |
| 1172 | return prototype->GetElement(index); |
| 1173 | } |
| 1174 | |
| 1175 | return object->GetElement(index); |
| 1176 | } |
| 1177 | |
| 1178 | |
| 1179 | Object* Runtime::GetObjectProperty(Handle<Object> object, Object* key) { |
| 1180 | if (object->IsUndefined() || object->IsNull()) { |
| 1181 | HandleScope scope; |
| 1182 | Handle<Object> key_handle(key); |
| 1183 | Handle<Object> args[2] = { key_handle, object }; |
| 1184 | Handle<Object> error = |
| 1185 | Factory::NewTypeError("non_object_property_load", |
| 1186 | HandleVector(args, 2)); |
| 1187 | return Top::Throw(*error); |
| 1188 | } |
| 1189 | |
| 1190 | // Check if the given key is an array index. |
| 1191 | uint32_t index; |
| 1192 | if (Array::IndexFromObject(key, &index)) { |
| 1193 | HandleScope scope; |
| 1194 | return GetElementOrCharAt(object, index); |
| 1195 | } |
| 1196 | |
| 1197 | // Convert the key to a string - possibly by calling back into JavaScript. |
| 1198 | String* name; |
| 1199 | if (key->IsString()) { |
| 1200 | name = String::cast(key); |
| 1201 | } else { |
| 1202 | HandleScope scope; |
| 1203 | bool has_pending_exception = false; |
| 1204 | Handle<Object> converted = |
| 1205 | Execution::ToString(Handle<Object>(key), &has_pending_exception); |
| 1206 | if (has_pending_exception) return Failure::Exception(); |
| 1207 | name = String::cast(*converted); |
| 1208 | } |
| 1209 | |
| 1210 | // Check if the name is trivially convertable to an index and get |
| 1211 | // the element if so. |
| 1212 | if (name->AsArrayIndex(&index)) { |
| 1213 | HandleScope scope; |
| 1214 | return GetElementOrCharAt(object, index); |
| 1215 | } else { |
| 1216 | PropertyAttributes attr; |
| 1217 | return object->GetProperty(name, &attr); |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | |
| 1222 | static Object* Runtime_GetProperty(Arguments args) { |
| 1223 | NoHandleAllocation ha; |
| 1224 | ASSERT(args.length() == 2); |
| 1225 | |
| 1226 | Handle<Object> object = args.at<Object>(0); |
| 1227 | Object* key = args[1]; |
| 1228 | |
| 1229 | return Runtime::GetObjectProperty(object, key); |
| 1230 | } |
| 1231 | |
| 1232 | |
| 1233 | Object* Runtime::SetObjectProperty(Handle<Object> object, |
| 1234 | Handle<Object> key, |
| 1235 | Handle<Object> value, |
| 1236 | PropertyAttributes attr) { |
| 1237 | if (object->IsUndefined() || object->IsNull()) { |
| 1238 | HandleScope scope; |
| 1239 | Handle<Object> obj(object); |
| 1240 | Handle<Object> args[2] = { key, obj }; |
| 1241 | Handle<Object> error = |
| 1242 | Factory::NewTypeError("non_object_property_store", |
| 1243 | HandleVector(args, 2)); |
| 1244 | return Top::Throw(*error); |
| 1245 | } |
| 1246 | |
| 1247 | // If the object isn't a JavaScript object, we ignore the store. |
| 1248 | if (!object->IsJSObject()) return *value; |
| 1249 | |
| 1250 | // Check if the given key is an array index. |
| 1251 | uint32_t index; |
| 1252 | if (Array::IndexFromObject(*key, &index)) { |
| 1253 | ASSERT(attr == NONE); |
| 1254 | |
| 1255 | // In Firefox/SpiderMonkey, Safari and Opera you can access the characters |
| 1256 | // of a string using [] notation. We need to support this too in |
| 1257 | // JavaScript. |
| 1258 | // In the case of a String object we just need to redirect the assignment to |
| 1259 | // the underlying string if the index is in range. Since the underlying |
| 1260 | // string does nothing with the assignment then we can ignore such |
| 1261 | // assignments. |
| 1262 | if (object->IsStringObjectWithCharacterAt(index)) |
| 1263 | return *value; |
| 1264 | |
| 1265 | Object* result = JSObject::cast(*object)->SetElement(index, *value); |
| 1266 | if (result->IsFailure()) return result; |
| 1267 | return *value; |
| 1268 | } |
| 1269 | |
| 1270 | if (key->IsString()) { |
| 1271 | Object* result; |
| 1272 | if (String::cast(*key)->AsArrayIndex(&index)) { |
| 1273 | ASSERT(attr == NONE); |
| 1274 | result = JSObject::cast(*object)->SetElement(index, *value); |
| 1275 | } else { |
| 1276 | String::cast(*key)->TryFlatten(); |
| 1277 | result = |
| 1278 | JSObject::cast(*object)->SetProperty(String::cast(*key), *value, |
| 1279 | attr); |
| 1280 | } |
| 1281 | if (result->IsFailure()) return result; |
| 1282 | return *value; |
| 1283 | } |
| 1284 | |
| 1285 | // Handlify object and value before calling into JavaScript again. |
| 1286 | Handle<JSObject> object_handle = Handle<JSObject>::cast(object); |
| 1287 | Handle<Object> value_handle = value; |
| 1288 | |
| 1289 | // Call-back into JavaScript to convert the key to a string. |
| 1290 | HandleScope scope; |
| 1291 | bool has_pending_exception = false; |
| 1292 | Handle<Object> converted = Execution::ToString(key, &has_pending_exception); |
| 1293 | if (has_pending_exception) return Failure::Exception(); |
| 1294 | Handle<String> name = Handle<String>::cast(converted); |
| 1295 | |
| 1296 | if (name->AsArrayIndex(&index)) { |
| 1297 | ASSERT(attr == NONE); |
| 1298 | return object_handle->SetElement(index, *value_handle); |
| 1299 | } else { |
| 1300 | return object_handle->SetProperty(*name, *value_handle, attr); |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | |
| 1305 | static Object* Runtime_AddProperty(Arguments args) { |
| 1306 | NoHandleAllocation ha; |
| 1307 | ASSERT(args.length() == 4); |
| 1308 | |
| 1309 | CONVERT_CHECKED(JSObject, object, args[0]); |
| 1310 | CONVERT_CHECKED(String, name, args[1]); |
| 1311 | RUNTIME_ASSERT(!object->HasLocalProperty(name)); |
| 1312 | CONVERT_CHECKED(Smi, attr_obj, args[3]); |
| 1313 | |
| 1314 | int attr = attr_obj->value(); |
| 1315 | RUNTIME_ASSERT((attr & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0); |
| 1316 | PropertyAttributes attributes = static_cast<PropertyAttributes>(attr); |
| 1317 | |
| 1318 | return object->AddProperty(name, args[2], attributes); |
| 1319 | } |
| 1320 | |
| 1321 | |
| 1322 | static Object* Runtime_SetProperty(Arguments args) { |
| 1323 | NoHandleAllocation ha; |
| 1324 | RUNTIME_ASSERT(args.length() == 3 || args.length() == 4); |
| 1325 | |
| 1326 | Handle<Object> object = args.at<Object>(0); |
| 1327 | Handle<Object> key = args.at<Object>(1); |
| 1328 | Handle<Object> value = args.at<Object>(2); |
| 1329 | |
| 1330 | // Compute attributes. |
| 1331 | PropertyAttributes attributes = NONE; |
| 1332 | if (args.length() == 4) { |
| 1333 | CONVERT_CHECKED(Smi, value_obj, args[3]); |
| 1334 | int value = value_obj->value(); |
| 1335 | // Only attribute bits should be set. |
| 1336 | ASSERT((value & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0); |
| 1337 | attributes = static_cast<PropertyAttributes>(value); |
| 1338 | } |
| 1339 | return Runtime::SetObjectProperty(object, key, value, attributes); |
| 1340 | } |
| 1341 | |
| 1342 | |
| 1343 | // Set a local property, even if it is READ_ONLY. If the property does not |
| 1344 | // exist, it will be added with attributes NONE. |
| 1345 | static Object* Runtime_IgnoreAttributesAndSetProperty(Arguments args) { |
| 1346 | NoHandleAllocation ha; |
| 1347 | ASSERT(args.length() == 3); |
| 1348 | |
| 1349 | CONVERT_CHECKED(JSObject, object, args[0]); |
| 1350 | CONVERT_CHECKED(String, name, args[1]); |
| 1351 | |
| 1352 | return object->IgnoreAttributesAndSetLocalProperty(name, args[2]); |
| 1353 | } |
| 1354 | |
| 1355 | |
| 1356 | static Object* Runtime_DeleteProperty(Arguments args) { |
| 1357 | NoHandleAllocation ha; |
| 1358 | ASSERT(args.length() == 2); |
| 1359 | |
| 1360 | CONVERT_CHECKED(JSObject, object, args[0]); |
| 1361 | CONVERT_CHECKED(String, key, args[1]); |
| 1362 | return object->DeleteProperty(key); |
| 1363 | } |
| 1364 | |
| 1365 | |
| 1366 | static Object* Runtime_HasLocalProperty(Arguments args) { |
| 1367 | NoHandleAllocation ha; |
| 1368 | ASSERT(args.length() == 2); |
| 1369 | CONVERT_CHECKED(String, key, args[1]); |
| 1370 | |
| 1371 | // Only JS objects can have properties. |
| 1372 | if (args[0]->IsJSObject()) { |
| 1373 | JSObject* object = JSObject::cast(args[0]); |
| 1374 | if (object->HasLocalProperty(key)) return Heap::true_value(); |
| 1375 | } else if (args[0]->IsString()) { |
| 1376 | // Well, there is one exception: Handle [] on strings. |
| 1377 | uint32_t index; |
| 1378 | if (key->AsArrayIndex(&index)) { |
| 1379 | String* string = String::cast(args[0]); |
| 1380 | if (index < static_cast<uint32_t>(string->length())) |
| 1381 | return Heap::true_value(); |
| 1382 | } |
| 1383 | } |
| 1384 | return Heap::false_value(); |
| 1385 | } |
| 1386 | |
| 1387 | |
| 1388 | static Object* Runtime_HasProperty(Arguments args) { |
| 1389 | NoHandleAllocation na; |
| 1390 | ASSERT(args.length() == 2); |
| 1391 | |
| 1392 | // Only JS objects can have properties. |
| 1393 | if (args[0]->IsJSObject()) { |
| 1394 | JSObject* object = JSObject::cast(args[0]); |
| 1395 | CONVERT_CHECKED(String, key, args[1]); |
| 1396 | if (object->HasProperty(key)) return Heap::true_value(); |
| 1397 | } |
| 1398 | return Heap::false_value(); |
| 1399 | } |
| 1400 | |
| 1401 | |
| 1402 | static Object* Runtime_HasElement(Arguments args) { |
| 1403 | NoHandleAllocation na; |
| 1404 | ASSERT(args.length() == 2); |
| 1405 | |
| 1406 | // Only JS objects can have elements. |
| 1407 | if (args[0]->IsJSObject()) { |
| 1408 | JSObject* object = JSObject::cast(args[0]); |
| 1409 | CONVERT_CHECKED(Smi, index_obj, args[1]); |
| 1410 | uint32_t index = index_obj->value(); |
| 1411 | if (object->HasElement(index)) return Heap::true_value(); |
| 1412 | } |
| 1413 | return Heap::false_value(); |
| 1414 | } |
| 1415 | |
| 1416 | |
| 1417 | static Object* Runtime_IsPropertyEnumerable(Arguments args) { |
| 1418 | NoHandleAllocation ha; |
| 1419 | ASSERT(args.length() == 2); |
| 1420 | |
| 1421 | CONVERT_CHECKED(JSObject, object, args[0]); |
| 1422 | CONVERT_CHECKED(String, key, args[1]); |
| 1423 | |
| 1424 | uint32_t index; |
| 1425 | if (key->AsArrayIndex(&index)) { |
| 1426 | return Heap::ToBoolean(object->HasElement(index)); |
| 1427 | } |
| 1428 | |
| 1429 | LookupResult result; |
| 1430 | object->LocalLookup(key, &result); |
| 1431 | if (!result.IsProperty()) return Heap::false_value(); |
| 1432 | return Heap::ToBoolean(!result.IsDontEnum()); |
| 1433 | } |
| 1434 | |
| 1435 | |
| 1436 | static Object* Runtime_GetPropertyNames(Arguments args) { |
| 1437 | HandleScope scope; |
| 1438 | ASSERT(args.length() == 1); |
| 1439 | |
| 1440 | CONVERT_CHECKED(JSObject, raw_object, args[0]); |
| 1441 | Handle<JSObject> object(raw_object); |
| 1442 | return *GetKeysFor(object); |
| 1443 | } |
| 1444 | |
| 1445 | |
| 1446 | // Returns either a FixedArray as Runtime_GetPropertyNames, |
| 1447 | // or, if the given object has an enum cache that contains |
| 1448 | // all enumerable properties of the object and its prototypes |
| 1449 | // have none, the map of the object. This is used to speed up |
| 1450 | // the check for deletions during a for-in. |
| 1451 | static Object* Runtime_GetPropertyNamesFast(Arguments args) { |
| 1452 | ASSERT(args.length() == 1); |
| 1453 | |
| 1454 | CONVERT_CHECKED(JSObject, raw_object, args[0]); |
| 1455 | |
| 1456 | if (raw_object->IsSimpleEnum()) return raw_object->map(); |
| 1457 | |
| 1458 | HandleScope scope; |
| 1459 | Handle<JSObject> object(raw_object); |
| 1460 | Handle<FixedArray> content = GetKeysInFixedArrayFor(object); |
| 1461 | |
| 1462 | // Test again, since cache may have been built by preceding call. |
| 1463 | if (object->IsSimpleEnum()) return object->map(); |
| 1464 | |
| 1465 | return *content; |
| 1466 | } |
| 1467 | |
| 1468 | |
| 1469 | static Object* Runtime_GetArgumentsProperty(Arguments args) { |
| 1470 | NoHandleAllocation ha; |
| 1471 | ASSERT(args.length() == 1); |
| 1472 | |
| 1473 | // Compute the frame holding the arguments. |
| 1474 | JavaScriptFrameIterator it; |
| 1475 | it.AdvanceToArgumentsFrame(); |
| 1476 | JavaScriptFrame* frame = it.frame(); |
| 1477 | |
| 1478 | // Get the actual number of provided arguments. |
| 1479 | const uint32_t n = frame->GetProvidedParametersCount(); |
| 1480 | |
| 1481 | // Try to convert the key to an index. If successful and within |
| 1482 | // index return the the argument from the frame. |
| 1483 | uint32_t index; |
| 1484 | if (Array::IndexFromObject(args[0], &index) && index < n) { |
| 1485 | return frame->GetParameter(index); |
| 1486 | } |
| 1487 | |
| 1488 | // Convert the key to a string. |
| 1489 | HandleScope scope; |
| 1490 | bool exception = false; |
| 1491 | Handle<Object> converted = |
| 1492 | Execution::ToString(args.at<Object>(0), &exception); |
| 1493 | if (exception) return Failure::Exception(); |
| 1494 | Handle<String> key = Handle<String>::cast(converted); |
| 1495 | |
| 1496 | // Try to convert the string key into an array index. |
| 1497 | if (key->AsArrayIndex(&index)) { |
| 1498 | if (index < n) { |
| 1499 | return frame->GetParameter(index); |
| 1500 | } else { |
| 1501 | return Top::initial_object_prototype()->GetElement(index); |
| 1502 | } |
| 1503 | } |
| 1504 | |
| 1505 | // Handle special arguments properties. |
| 1506 | if (key->Equals(Heap::length_symbol())) return Smi::FromInt(n); |
| 1507 | if (key->Equals(Heap::callee_symbol())) return frame->function(); |
| 1508 | |
| 1509 | // Lookup in the initial Object.prototype object. |
| 1510 | return Top::initial_object_prototype()->GetProperty(*key); |
| 1511 | } |
| 1512 | |
| 1513 | |
| 1514 | static Object* Runtime_ToBool(Arguments args) { |
| 1515 | NoHandleAllocation ha; |
| 1516 | ASSERT(args.length() == 1); |
| 1517 | |
| 1518 | return args[0]->ToBoolean(); |
| 1519 | } |
| 1520 | |
| 1521 | |
| 1522 | // Returns the type string of a value; see ECMA-262, 11.4.3 (p 47). |
| 1523 | // Possible optimizations: put the type string into the oddballs. |
| 1524 | static Object* Runtime_Typeof(Arguments args) { |
| 1525 | NoHandleAllocation ha; |
| 1526 | |
| 1527 | Object* obj = args[0]; |
| 1528 | if (obj->IsNumber()) return Heap::number_symbol(); |
| 1529 | HeapObject* heap_obj = HeapObject::cast(obj); |
| 1530 | |
| 1531 | // typeof an undetectable object is 'undefined' |
| 1532 | if (heap_obj->map()->is_undetectable()) |
| 1533 | return Heap::undefined_symbol(); |
| 1534 | |
| 1535 | InstanceType instance_type = heap_obj->map()->instance_type(); |
| 1536 | if (instance_type < FIRST_NONSTRING_TYPE) { |
| 1537 | return Heap::string_symbol(); |
| 1538 | } |
| 1539 | |
| 1540 | switch (instance_type) { |
| 1541 | case ODDBALL_TYPE: |
| 1542 | if (heap_obj->IsTrue() || heap_obj->IsFalse()) { |
| 1543 | return Heap::boolean_symbol(); |
| 1544 | } |
| 1545 | if (heap_obj->IsNull()) { |
| 1546 | return Heap::object_symbol(); |
| 1547 | } |
| 1548 | ASSERT(heap_obj->IsUndefined()); |
| 1549 | return Heap::undefined_symbol(); |
| 1550 | case JS_FUNCTION_TYPE: |
| 1551 | return Heap::function_symbol(); |
| 1552 | default: |
| 1553 | // For any kind of object not handled above, the spec rule for |
| 1554 | // host objects gives that it is okay to return "object" |
| 1555 | return Heap::object_symbol(); |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | |
| 1560 | static Object* Runtime_StringToNumber(Arguments args) { |
| 1561 | NoHandleAllocation ha; |
| 1562 | ASSERT(args.length() == 1); |
| 1563 | CONVERT_CHECKED(String, subject, args[0]); |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 1564 | subject->TryFlatten(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1565 | return Heap::NumberFromDouble(StringToDouble(subject, ALLOW_HEX)); |
| 1566 | } |
| 1567 | |
| 1568 | |
| 1569 | static Object* Runtime_StringFromCharCodeArray(Arguments args) { |
| 1570 | NoHandleAllocation ha; |
| 1571 | ASSERT(args.length() == 1); |
| 1572 | |
| 1573 | CONVERT_CHECKED(JSArray, codes, args[0]); |
| 1574 | int length = Smi::cast(codes->length())->value(); |
| 1575 | |
| 1576 | // Check if the string can be ASCII. |
| 1577 | int i; |
| 1578 | for (i = 0; i < length; i++) { |
| 1579 | Object* element = codes->GetElement(i); |
| 1580 | CONVERT_NUMBER_CHECKED(int, chr, Int32, element); |
| 1581 | if ((chr & 0xffff) > String::kMaxAsciiCharCode) |
| 1582 | break; |
| 1583 | } |
| 1584 | |
| 1585 | Object* object = NULL; |
| 1586 | if (i == length) { // The string is ASCII. |
| 1587 | object = Heap::AllocateRawAsciiString(length); |
| 1588 | } else { // The string is not ASCII. |
| 1589 | object = Heap::AllocateRawTwoByteString(length); |
| 1590 | } |
| 1591 | |
| 1592 | if (object->IsFailure()) return object; |
| 1593 | String* result = String::cast(object); |
| 1594 | for (int i = 0; i < length; i++) { |
| 1595 | Object* element = codes->GetElement(i); |
| 1596 | CONVERT_NUMBER_CHECKED(int, chr, Int32, element); |
| 1597 | result->Set(i, chr & 0xffff); |
| 1598 | } |
| 1599 | return result; |
| 1600 | } |
| 1601 | |
| 1602 | |
| 1603 | // kNotEscaped is generated by the following: |
| 1604 | // |
| 1605 | // #!/bin/perl |
| 1606 | // for (my $i = 0; $i < 256; $i++) { |
| 1607 | // print "\n" if $i % 16 == 0; |
| 1608 | // my $c = chr($i); |
| 1609 | // my $escaped = 1; |
| 1610 | // $escaped = 0 if $c =~ m#[A-Za-z0-9@*_+./-]#; |
| 1611 | // print $escaped ? "0, " : "1, "; |
| 1612 | // } |
| 1613 | |
| 1614 | |
| 1615 | static bool IsNotEscaped(uint16_t character) { |
| 1616 | // Only for 8 bit characters, the rest are always escaped (in a different way) |
| 1617 | ASSERT(character < 256); |
| 1618 | static const char kNotEscaped[256] = { |
| 1619 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1620 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1621 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, |
| 1622 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, |
| 1623 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 1624 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, |
| 1625 | 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 1626 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, |
| 1627 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1628 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1629 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1630 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1631 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1632 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1633 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1634 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1635 | }; |
| 1636 | return kNotEscaped[character] != 0; |
| 1637 | } |
| 1638 | |
| 1639 | |
| 1640 | static Object* Runtime_URIEscape(Arguments args) { |
| 1641 | const char hex_chars[] = "0123456789ABCDEF"; |
| 1642 | NoHandleAllocation ha; |
| 1643 | ASSERT(args.length() == 1); |
| 1644 | CONVERT_CHECKED(String, source, args[0]); |
| 1645 | |
| 1646 | source->TryFlatten(); |
| 1647 | |
| 1648 | int escaped_length = 0; |
| 1649 | int length = source->length(); |
| 1650 | { |
| 1651 | Access<StringInputBuffer> buffer(&string_input_buffer); |
| 1652 | buffer->Reset(source); |
| 1653 | while (buffer->has_more()) { |
| 1654 | uint16_t character = buffer->GetNext(); |
| 1655 | if (character >= 256) { |
| 1656 | escaped_length += 6; |
| 1657 | } else if (IsNotEscaped(character)) { |
| 1658 | escaped_length++; |
| 1659 | } else { |
| 1660 | escaped_length += 3; |
| 1661 | } |
| 1662 | // We don't allow strings that are longer than Smi range. |
| 1663 | if (!Smi::IsValid(escaped_length)) { |
| 1664 | Top::context()->mark_out_of_memory(); |
| 1665 | return Failure::OutOfMemoryException(); |
| 1666 | } |
| 1667 | } |
| 1668 | } |
| 1669 | // No length change implies no change. Return original string if no change. |
| 1670 | if (escaped_length == length) { |
| 1671 | return source; |
| 1672 | } |
| 1673 | Object* o = Heap::AllocateRawAsciiString(escaped_length); |
| 1674 | if (o->IsFailure()) return o; |
| 1675 | String* destination = String::cast(o); |
| 1676 | int dest_position = 0; |
| 1677 | |
| 1678 | Access<StringInputBuffer> buffer(&string_input_buffer); |
| 1679 | buffer->Rewind(); |
| 1680 | while (buffer->has_more()) { |
| 1681 | uint16_t character = buffer->GetNext(); |
| 1682 | if (character >= 256) { |
| 1683 | destination->Set(dest_position, '%'); |
| 1684 | destination->Set(dest_position+1, 'u'); |
| 1685 | destination->Set(dest_position+2, hex_chars[character >> 12]); |
| 1686 | destination->Set(dest_position+3, hex_chars[(character >> 8) & 0xf]); |
| 1687 | destination->Set(dest_position+4, hex_chars[(character >> 4) & 0xf]); |
| 1688 | destination->Set(dest_position+5, hex_chars[character & 0xf]); |
| 1689 | dest_position += 6; |
| 1690 | } else if (IsNotEscaped(character)) { |
| 1691 | destination->Set(dest_position, character); |
| 1692 | dest_position++; |
| 1693 | } else { |
| 1694 | destination->Set(dest_position, '%'); |
| 1695 | destination->Set(dest_position+1, hex_chars[character >> 4]); |
| 1696 | destination->Set(dest_position+2, hex_chars[character & 0xf]); |
| 1697 | dest_position += 3; |
| 1698 | } |
| 1699 | } |
| 1700 | return destination; |
| 1701 | } |
| 1702 | |
| 1703 | |
| 1704 | static inline int TwoDigitHex(uint16_t character1, uint16_t character2) { |
| 1705 | static const signed char kHexValue['g'] = { |
| 1706 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 1707 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 1708 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 1709 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, |
| 1710 | -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 1711 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 1712 | -1, 10, 11, 12, 13, 14, 15 }; |
| 1713 | |
| 1714 | if (character1 > 'f') return -1; |
| 1715 | int hi = kHexValue[character1]; |
| 1716 | if (hi == -1) return -1; |
| 1717 | if (character2 > 'f') return -1; |
| 1718 | int lo = kHexValue[character2]; |
| 1719 | if (lo == -1) return -1; |
| 1720 | return (hi << 4) + lo; |
| 1721 | } |
| 1722 | |
| 1723 | |
| 1724 | static inline int Unescape(String* source, int i, int length, int* step) { |
| 1725 | uint16_t character = source->Get(i); |
| 1726 | int32_t hi, lo; |
| 1727 | if (character == '%' && |
| 1728 | i <= length - 6 && |
| 1729 | source->Get(i + 1) == 'u' && |
| 1730 | (hi = TwoDigitHex(source->Get(i + 2), source->Get(i + 3))) != -1 && |
| 1731 | (lo = TwoDigitHex(source->Get(i + 4), source->Get(i + 5))) != -1) { |
| 1732 | *step = 6; |
| 1733 | return (hi << 8) + lo; |
| 1734 | } else if (character == '%' && |
| 1735 | i <= length - 3 && |
| 1736 | (lo = TwoDigitHex(source->Get(i + 1), source->Get(i + 2))) != -1) { |
| 1737 | *step = 3; |
| 1738 | return lo; |
| 1739 | } else { |
| 1740 | *step = 1; |
| 1741 | return character; |
| 1742 | } |
| 1743 | } |
| 1744 | |
| 1745 | |
| 1746 | static Object* Runtime_URIUnescape(Arguments args) { |
| 1747 | NoHandleAllocation ha; |
| 1748 | ASSERT(args.length() == 1); |
| 1749 | CONVERT_CHECKED(String, source, args[0]); |
| 1750 | |
| 1751 | source->TryFlatten(); |
| 1752 | |
| 1753 | bool ascii = true; |
| 1754 | int length = source->length(); |
| 1755 | |
| 1756 | int unescaped_length = 0; |
| 1757 | for (int i = 0; i < length; unescaped_length++) { |
| 1758 | int step; |
| 1759 | if (Unescape(source, i, length, &step) > String::kMaxAsciiCharCode) |
| 1760 | ascii = false; |
| 1761 | i += step; |
| 1762 | } |
| 1763 | |
| 1764 | // No length change implies no change. Return original string if no change. |
| 1765 | if (unescaped_length == length) |
| 1766 | return source; |
| 1767 | |
| 1768 | Object* o = ascii ? |
| 1769 | Heap::AllocateRawAsciiString(unescaped_length) : |
| 1770 | Heap::AllocateRawTwoByteString(unescaped_length); |
| 1771 | if (o->IsFailure()) return o; |
| 1772 | String* destination = String::cast(o); |
| 1773 | |
| 1774 | int dest_position = 0; |
| 1775 | for (int i = 0; i < length; dest_position++) { |
| 1776 | int step; |
| 1777 | destination->Set(dest_position, Unescape(source, i, length, &step)); |
| 1778 | i += step; |
| 1779 | } |
| 1780 | return destination; |
| 1781 | } |
| 1782 | |
| 1783 | |
| 1784 | static Object* Runtime_StringParseInt(Arguments args) { |
| 1785 | NoHandleAllocation ha; |
| 1786 | |
| 1787 | CONVERT_CHECKED(String, s, args[0]); |
| 1788 | CONVERT_DOUBLE_CHECKED(n, args[1]); |
| 1789 | int radix = FastD2I(n); |
| 1790 | |
| 1791 | s->TryFlatten(); |
| 1792 | |
| 1793 | int len = s->length(); |
| 1794 | int i; |
| 1795 | |
| 1796 | // Skip leading white space. |
| 1797 | for (i = 0; i < len && Scanner::kIsWhiteSpace.get(s->Get(i)); i++) ; |
| 1798 | if (i == len) return Heap::nan_value(); |
| 1799 | |
| 1800 | // Compute the sign (default to +). |
| 1801 | int sign = 1; |
| 1802 | if (s->Get(i) == '-') { |
| 1803 | sign = -1; |
| 1804 | i++; |
| 1805 | } else if (s->Get(i) == '+') { |
| 1806 | i++; |
| 1807 | } |
| 1808 | |
| 1809 | // Compute the radix if 0. |
| 1810 | if (radix == 0) { |
| 1811 | radix = 10; |
| 1812 | if (i < len && s->Get(i) == '0') { |
| 1813 | radix = 8; |
| 1814 | if (i + 1 < len) { |
| 1815 | int c = s->Get(i + 1); |
| 1816 | if (c == 'x' || c == 'X') { |
| 1817 | radix = 16; |
| 1818 | i += 2; |
| 1819 | } |
| 1820 | } |
| 1821 | } |
| 1822 | } else if (radix == 16) { |
| 1823 | // Allow 0x or 0X prefix if radix is 16. |
| 1824 | if (i + 1 < len && s->Get(i) == '0') { |
| 1825 | int c = s->Get(i + 1); |
| 1826 | if (c == 'x' || c == 'X') i += 2; |
| 1827 | } |
| 1828 | } |
| 1829 | |
| 1830 | RUNTIME_ASSERT(2 <= radix && radix <= 36); |
| 1831 | double value; |
| 1832 | int end_index = StringToInt(s, i, radix, &value); |
| 1833 | if (end_index != i) { |
| 1834 | return Heap::NumberFromDouble(sign * value); |
| 1835 | } |
| 1836 | return Heap::nan_value(); |
| 1837 | } |
| 1838 | |
| 1839 | |
| 1840 | static Object* Runtime_StringParseFloat(Arguments args) { |
| 1841 | NoHandleAllocation ha; |
| 1842 | CONVERT_CHECKED(String, str, args[0]); |
| 1843 | |
| 1844 | // ECMA-262 section 15.1.2.3, empty string is NaN |
| 1845 | double value = StringToDouble(str, ALLOW_TRAILING_JUNK, OS::nan_value()); |
| 1846 | |
| 1847 | // Create a number object from the value. |
| 1848 | return Heap::NumberFromDouble(value); |
| 1849 | } |
| 1850 | |
| 1851 | |
| 1852 | static unibrow::Mapping<unibrow::ToUppercase, 128> to_upper_mapping; |
| 1853 | static unibrow::Mapping<unibrow::ToLowercase, 128> to_lower_mapping; |
| 1854 | |
| 1855 | |
| 1856 | template <class Converter> |
| 1857 | static Object* ConvertCase(Arguments args, |
| 1858 | unibrow::Mapping<Converter, 128> *mapping) { |
| 1859 | NoHandleAllocation ha; |
| 1860 | |
| 1861 | CONVERT_CHECKED(String, s, args[0]); |
| 1862 | int raw_string_length = s->length(); |
| 1863 | // Assume that the string is not empty; we need this assumption later |
| 1864 | if (raw_string_length == 0) return s; |
| 1865 | int length = raw_string_length; |
| 1866 | |
| 1867 | s->TryFlatten(); |
| 1868 | |
| 1869 | // We try this twice, once with the assumption that the result is |
| 1870 | // no longer than the input and, if that assumption breaks, again |
| 1871 | // with the exact length. This is implemented using a goto back |
| 1872 | // to this label if we discover that the assumption doesn't hold. |
| 1873 | // I apologize sincerely for this and will give a vaffel-is to |
| 1874 | // anyone who can implement it in a nicer way. |
| 1875 | try_convert: |
| 1876 | |
| 1877 | // Allocate the resulting string. |
| 1878 | // |
| 1879 | // NOTE: This assumes that the upper/lower case of an ascii |
| 1880 | // character is also ascii. This is currently the case, but it |
| 1881 | // might break in the future if we implement more context and locale |
| 1882 | // dependent upper/lower conversions. |
| 1883 | Object* o = s->IsAscii() |
| 1884 | ? Heap::AllocateRawAsciiString(length) |
| 1885 | : Heap::AllocateRawTwoByteString(length); |
| 1886 | if (o->IsFailure()) |
| 1887 | return o; |
| 1888 | String* result = String::cast(o); |
| 1889 | bool has_changed_character = false; |
| 1890 | |
| 1891 | |
| 1892 | // Convert all characters to upper case, assuming that they will fit |
| 1893 | // in the buffer |
| 1894 | Access<StringInputBuffer> buffer(&string_input_buffer); |
| 1895 | buffer->Reset(s); |
| 1896 | unibrow::uchar chars[unibrow::kMaxCaseConvertedSize]; |
| 1897 | int i = 0; |
| 1898 | // We can assume that the string is not empty |
| 1899 | uc32 current = buffer->GetNext(); |
| 1900 | while (i < length) { |
| 1901 | uc32 next = buffer->has_more() ? buffer->GetNext() : 0; |
| 1902 | int char_length = mapping->get(current, next, chars); |
| 1903 | if (char_length == 0) { |
| 1904 | // The case conversion of this character is the character itself. |
| 1905 | result->Set(i, current); |
| 1906 | i++; |
| 1907 | } else if (char_length == 1) { |
| 1908 | // Common case: converting the letter resulted in one character. |
| 1909 | ASSERT(static_cast<uc32>(chars[0]) != current); |
| 1910 | result->Set(i, chars[0]); |
| 1911 | has_changed_character = true; |
| 1912 | i++; |
| 1913 | } else if (length == raw_string_length) { |
| 1914 | // We've assumed that the result would be as long as the |
| 1915 | // input but here is a character that converts to several |
| 1916 | // characters. No matter, we calculate the exact length |
| 1917 | // of the result and try the whole thing again. |
| 1918 | // |
| 1919 | // Note that this leaves room for optimization. We could just |
| 1920 | // memcpy what we already have to the result string. Also, |
| 1921 | // the result string is the last object allocated we could |
| 1922 | // "realloc" it and probably, in the vast majority of cases, |
| 1923 | // extend the existing string to be able to hold the full |
| 1924 | // result. |
| 1925 | int current_length = i + char_length + mapping->get(next, 0, chars); |
| 1926 | while (buffer->has_more()) { |
| 1927 | current = buffer->GetNext(); |
| 1928 | int char_length = mapping->get(current, 0, chars); |
| 1929 | if (char_length == 0) char_length = 1; |
| 1930 | current += char_length; |
| 1931 | } |
| 1932 | length = current_length; |
| 1933 | goto try_convert; |
| 1934 | } else { |
| 1935 | for (int j = 0; j < char_length; j++) { |
| 1936 | result->Set(i, chars[j]); |
| 1937 | i++; |
| 1938 | } |
| 1939 | has_changed_character = true; |
| 1940 | } |
| 1941 | current = next; |
| 1942 | } |
| 1943 | if (has_changed_character) { |
| 1944 | return result; |
| 1945 | } else { |
| 1946 | // If we didn't actually change anything in doing the conversion |
| 1947 | // we simple return the result and let the converted string |
| 1948 | // become garbage; there is no reason to keep two identical strings |
| 1949 | // alive. |
| 1950 | return s; |
| 1951 | } |
| 1952 | } |
| 1953 | |
| 1954 | |
| 1955 | static Object* Runtime_StringToLowerCase(Arguments args) { |
| 1956 | return ConvertCase<unibrow::ToLowercase>(args, &to_lower_mapping); |
| 1957 | } |
| 1958 | |
| 1959 | |
| 1960 | static Object* Runtime_StringToUpperCase(Arguments args) { |
| 1961 | return ConvertCase<unibrow::ToUppercase>(args, &to_upper_mapping); |
| 1962 | } |
| 1963 | |
| 1964 | |
| 1965 | static Object* Runtime_ConsStringFst(Arguments args) { |
| 1966 | NoHandleAllocation ha; |
| 1967 | |
| 1968 | CONVERT_CHECKED(ConsString, str, args[0]); |
| 1969 | return str->first(); |
| 1970 | } |
| 1971 | |
| 1972 | |
| 1973 | static Object* Runtime_ConsStringSnd(Arguments args) { |
| 1974 | NoHandleAllocation ha; |
| 1975 | |
| 1976 | CONVERT_CHECKED(ConsString, str, args[0]); |
| 1977 | return str->second(); |
| 1978 | } |
| 1979 | |
| 1980 | |
| 1981 | static Object* Runtime_NumberToString(Arguments args) { |
| 1982 | NoHandleAllocation ha; |
| 1983 | ASSERT(args.length() == 1); |
| 1984 | |
| 1985 | Object* number = args[0]; |
| 1986 | RUNTIME_ASSERT(number->IsNumber()); |
| 1987 | |
| 1988 | Object* cached = Heap::GetNumberStringCache(number); |
| 1989 | if (cached != Heap::undefined_value()) { |
| 1990 | return cached; |
| 1991 | } |
| 1992 | |
| 1993 | char arr[100]; |
| 1994 | Vector<char> buffer(arr, ARRAY_SIZE(arr)); |
| 1995 | const char* str; |
| 1996 | if (number->IsSmi()) { |
| 1997 | int num = Smi::cast(number)->value(); |
| 1998 | str = IntToCString(num, buffer); |
| 1999 | } else { |
| 2000 | double num = HeapNumber::cast(number)->value(); |
| 2001 | str = DoubleToCString(num, buffer); |
| 2002 | } |
| 2003 | Object* result = Heap::AllocateStringFromAscii(CStrVector(str)); |
| 2004 | |
| 2005 | if (!result->IsFailure()) { |
| 2006 | Heap::SetNumberStringCache(number, String::cast(result)); |
| 2007 | } |
| 2008 | return result; |
| 2009 | } |
| 2010 | |
| 2011 | |
| 2012 | static Object* Runtime_NumberToInteger(Arguments args) { |
| 2013 | NoHandleAllocation ha; |
| 2014 | ASSERT(args.length() == 1); |
| 2015 | |
| 2016 | Object* obj = args[0]; |
| 2017 | |
| 2018 | if (obj->IsSmi()) |
| 2019 | return obj; |
| 2020 | |
| 2021 | CONVERT_DOUBLE_CHECKED(number, obj); |
| 2022 | return Heap::NumberFromDouble(DoubleToInteger(number)); |
| 2023 | } |
| 2024 | |
| 2025 | |
| 2026 | static Object* Runtime_NumberToJSUint32(Arguments args) { |
| 2027 | NoHandleAllocation ha; |
| 2028 | ASSERT(args.length() == 1); |
| 2029 | |
| 2030 | Object* obj = args[0]; |
| 2031 | if (obj->IsSmi() && Smi::cast(obj)->value() >= 0) return obj; |
| 2032 | CONVERT_NUMBER_CHECKED(int32_t, number, Uint32, obj); |
| 2033 | return Heap::NumberFromUint32(number); |
| 2034 | } |
| 2035 | |
| 2036 | |
| 2037 | static Object* Runtime_NumberToJSInt32(Arguments args) { |
| 2038 | NoHandleAllocation ha; |
| 2039 | ASSERT(args.length() == 1); |
| 2040 | |
| 2041 | Object* obj = args[0]; |
| 2042 | if (obj->IsSmi()) return obj; |
| 2043 | CONVERT_DOUBLE_CHECKED(number, obj); |
| 2044 | return Heap::NumberFromInt32(DoubleToInt32(number)); |
| 2045 | } |
| 2046 | |
| 2047 | |
| 2048 | static Object* Runtime_NumberAdd(Arguments args) { |
| 2049 | NoHandleAllocation ha; |
| 2050 | ASSERT(args.length() == 2); |
| 2051 | |
| 2052 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2053 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2054 | return Heap::AllocateHeapNumber(x + y); |
| 2055 | } |
| 2056 | |
| 2057 | |
| 2058 | static Object* Runtime_NumberSub(Arguments args) { |
| 2059 | NoHandleAllocation ha; |
| 2060 | ASSERT(args.length() == 2); |
| 2061 | |
| 2062 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2063 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2064 | return Heap::AllocateHeapNumber(x - y); |
| 2065 | } |
| 2066 | |
| 2067 | |
| 2068 | static Object* Runtime_NumberMul(Arguments args) { |
| 2069 | NoHandleAllocation ha; |
| 2070 | ASSERT(args.length() == 2); |
| 2071 | |
| 2072 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2073 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2074 | return Heap::AllocateHeapNumber(x * y); |
| 2075 | } |
| 2076 | |
| 2077 | |
| 2078 | static Object* Runtime_NumberAlloc(Arguments args) { |
| 2079 | NoHandleAllocation ha; |
| 2080 | ASSERT(args.length() == 1); |
| 2081 | return Heap::AllocateHeapNumber(0); |
| 2082 | } |
| 2083 | |
| 2084 | |
| 2085 | static Object* Runtime_NumberUnaryMinus(Arguments args) { |
| 2086 | NoHandleAllocation ha; |
| 2087 | ASSERT(args.length() == 1); |
| 2088 | |
| 2089 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2090 | return Heap::AllocateHeapNumber(-x); |
| 2091 | } |
| 2092 | |
| 2093 | |
| 2094 | static Object* Runtime_NumberDiv(Arguments args) { |
| 2095 | NoHandleAllocation ha; |
| 2096 | ASSERT(args.length() == 2); |
| 2097 | |
| 2098 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2099 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2100 | return Heap::NewNumberFromDouble(x / y); |
| 2101 | } |
| 2102 | |
| 2103 | |
| 2104 | static Object* Runtime_NumberMod(Arguments args) { |
| 2105 | NoHandleAllocation ha; |
| 2106 | ASSERT(args.length() == 2); |
| 2107 | |
| 2108 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2109 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2110 | |
| 2111 | #ifdef WIN32 |
| 2112 | // Workaround MS fmod bugs. ECMA-262 says: |
| 2113 | // dividend is finite and divisor is an infinity => result equals dividend |
| 2114 | // dividend is a zero and divisor is nonzero finite => result equals dividend |
| 2115 | if (!(isfinite(x) && (!isfinite(y) && !isnan(y))) && |
| 2116 | !(x == 0 && (y != 0 && isfinite(y)))) |
| 2117 | #endif |
| 2118 | x = fmod(x, y); |
| 2119 | // NewNumberFromDouble may return a Smi instead of a Number object |
| 2120 | return Heap::NewNumberFromDouble(x); |
| 2121 | } |
| 2122 | |
| 2123 | |
| 2124 | static Object* Runtime_StringAdd(Arguments args) { |
| 2125 | NoHandleAllocation ha; |
| 2126 | ASSERT(args.length() == 2); |
| 2127 | |
| 2128 | CONVERT_CHECKED(String, str1, args[0]); |
| 2129 | CONVERT_CHECKED(String, str2, args[1]); |
| 2130 | int len1 = str1->length(); |
| 2131 | int len2 = str2->length(); |
| 2132 | if (len1 == 0) return str2; |
| 2133 | if (len2 == 0) return str1; |
| 2134 | int length_sum = len1 + len2; |
| 2135 | // Make sure that an out of memory exception is thrown if the length |
| 2136 | // of the new cons string is too large to fit in a Smi. |
| 2137 | if (length_sum > Smi::kMaxValue || length_sum < 0) { |
| 2138 | Top::context()->mark_out_of_memory(); |
| 2139 | return Failure::OutOfMemoryException(); |
| 2140 | } |
| 2141 | return Heap::AllocateConsString(str1, str2); |
| 2142 | } |
| 2143 | |
| 2144 | |
| 2145 | static Object* Runtime_StringBuilderConcat(Arguments args) { |
| 2146 | NoHandleAllocation ha; |
| 2147 | ASSERT(args.length() == 2); |
| 2148 | CONVERT_CHECKED(JSArray, array, args[0]); |
| 2149 | CONVERT_CHECKED(String, special, args[1]); |
| 2150 | int special_length = special->length(); |
| 2151 | Object* smi_array_length = array->length(); |
| 2152 | if (!smi_array_length->IsSmi()) { |
| 2153 | Top::context()->mark_out_of_memory(); |
| 2154 | return Failure::OutOfMemoryException(); |
| 2155 | } |
| 2156 | int array_length = Smi::cast(smi_array_length)->value(); |
| 2157 | if (!array->HasFastElements()) { |
| 2158 | return Top::Throw(Heap::illegal_argument_symbol()); |
| 2159 | } |
| 2160 | FixedArray* fixed_array = FixedArray::cast(array->elements()); |
| 2161 | if (fixed_array->length() < array_length) |
| 2162 | array_length = fixed_array->length(); |
| 2163 | |
| 2164 | if (array_length == 0) { |
| 2165 | return Heap::empty_string(); |
| 2166 | } else if (array_length == 1) { |
| 2167 | Object* first = fixed_array->get(0); |
| 2168 | if (first->IsString()) return first; |
| 2169 | } |
| 2170 | |
| 2171 | bool ascii = special->IsAscii(); |
| 2172 | int position = 0; |
| 2173 | for (int i = 0; i < array_length; i++) { |
| 2174 | Object* elt = fixed_array->get(i); |
| 2175 | if (elt->IsSmi()) { |
| 2176 | int len = Smi::cast(elt)->value(); |
| 2177 | int pos = len >> 11; |
| 2178 | len &= 0x7ff; |
| 2179 | if (pos + len > special_length) { |
| 2180 | return Top::Throw(Heap::illegal_argument_symbol()); |
| 2181 | } |
| 2182 | position += len; |
| 2183 | } else if (elt->IsString()) { |
| 2184 | String* element = String::cast(elt); |
| 2185 | int element_length = element->length(); |
| 2186 | if (!Smi::IsValid(element_length + position)) { |
| 2187 | Top::context()->mark_out_of_memory(); |
| 2188 | return Failure::OutOfMemoryException(); |
| 2189 | } |
| 2190 | position += element_length; |
| 2191 | if (ascii && !element->IsAscii()) |
| 2192 | ascii = false; |
| 2193 | } else { |
| 2194 | return Top::Throw(Heap::illegal_argument_symbol()); |
| 2195 | } |
| 2196 | } |
| 2197 | |
| 2198 | int length = position; |
| 2199 | position = 0; |
| 2200 | Object* object; |
| 2201 | if (ascii) { |
| 2202 | object = Heap::AllocateRawAsciiString(length); |
| 2203 | } else { |
| 2204 | object = Heap::AllocateRawTwoByteString(length); |
| 2205 | } |
| 2206 | if (object->IsFailure()) return object; |
| 2207 | |
| 2208 | String* answer = String::cast(object); |
| 2209 | for (int i = 0; i < array_length; i++) { |
| 2210 | Object* element = fixed_array->get(i); |
| 2211 | if (element->IsSmi()) { |
| 2212 | int len = Smi::cast(element)->value(); |
| 2213 | int pos = len >> 11; |
| 2214 | len &= 0x7ff; |
| 2215 | String::Flatten(special, answer, pos, pos + len, position); |
| 2216 | position += len; |
| 2217 | } else { |
| 2218 | String* string = String::cast(element); |
| 2219 | int element_length = string->length(); |
| 2220 | String::Flatten(string, answer, 0, element_length, position); |
| 2221 | position += element_length; |
| 2222 | } |
| 2223 | } |
| 2224 | return answer; |
| 2225 | } |
| 2226 | |
| 2227 | |
| 2228 | static Object* Runtime_NumberOr(Arguments args) { |
| 2229 | NoHandleAllocation ha; |
| 2230 | ASSERT(args.length() == 2); |
| 2231 | |
| 2232 | CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]); |
| 2233 | CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]); |
| 2234 | return Heap::NumberFromInt32(x | y); |
| 2235 | } |
| 2236 | |
| 2237 | |
| 2238 | static Object* Runtime_NumberAnd(Arguments args) { |
| 2239 | NoHandleAllocation ha; |
| 2240 | ASSERT(args.length() == 2); |
| 2241 | |
| 2242 | CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]); |
| 2243 | CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]); |
| 2244 | return Heap::NumberFromInt32(x & y); |
| 2245 | } |
| 2246 | |
| 2247 | |
| 2248 | static Object* Runtime_NumberXor(Arguments args) { |
| 2249 | NoHandleAllocation ha; |
| 2250 | ASSERT(args.length() == 2); |
| 2251 | |
| 2252 | CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]); |
| 2253 | CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]); |
| 2254 | return Heap::NumberFromInt32(x ^ y); |
| 2255 | } |
| 2256 | |
| 2257 | |
| 2258 | static Object* Runtime_NumberNot(Arguments args) { |
| 2259 | NoHandleAllocation ha; |
| 2260 | ASSERT(args.length() == 1); |
| 2261 | |
| 2262 | CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]); |
| 2263 | return Heap::NumberFromInt32(~x); |
| 2264 | } |
| 2265 | |
| 2266 | |
| 2267 | static Object* Runtime_NumberShl(Arguments args) { |
| 2268 | NoHandleAllocation ha; |
| 2269 | ASSERT(args.length() == 2); |
| 2270 | |
| 2271 | CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]); |
| 2272 | CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]); |
| 2273 | return Heap::NumberFromInt32(x << (y & 0x1f)); |
| 2274 | } |
| 2275 | |
| 2276 | |
| 2277 | static Object* Runtime_NumberShr(Arguments args) { |
| 2278 | NoHandleAllocation ha; |
| 2279 | ASSERT(args.length() == 2); |
| 2280 | |
| 2281 | CONVERT_NUMBER_CHECKED(uint32_t, x, Uint32, args[0]); |
| 2282 | CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]); |
| 2283 | return Heap::NumberFromUint32(x >> (y & 0x1f)); |
| 2284 | } |
| 2285 | |
| 2286 | |
| 2287 | static Object* Runtime_NumberSar(Arguments args) { |
| 2288 | NoHandleAllocation ha; |
| 2289 | ASSERT(args.length() == 2); |
| 2290 | |
| 2291 | CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]); |
| 2292 | CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]); |
| 2293 | return Heap::NumberFromInt32(ArithmeticShiftRight(x, y & 0x1f)); |
| 2294 | } |
| 2295 | |
| 2296 | |
| 2297 | static Object* Runtime_ObjectEquals(Arguments args) { |
| 2298 | NoHandleAllocation ha; |
| 2299 | ASSERT(args.length() == 2); |
| 2300 | |
| 2301 | return Smi::FromInt(args[0] == args[1] ? EQUAL : NOT_EQUAL); |
| 2302 | } |
| 2303 | |
| 2304 | |
| 2305 | static Object* Runtime_NumberEquals(Arguments args) { |
| 2306 | NoHandleAllocation ha; |
| 2307 | ASSERT(args.length() == 2); |
| 2308 | |
| 2309 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2310 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2311 | if (isnan(x)) return Smi::FromInt(NOT_EQUAL); |
| 2312 | if (isnan(y)) return Smi::FromInt(NOT_EQUAL); |
| 2313 | if (x == y) return Smi::FromInt(EQUAL); |
| 2314 | Object* result; |
| 2315 | if ((fpclassify(x) == FP_ZERO) && (fpclassify(y) == FP_ZERO)) { |
| 2316 | result = Smi::FromInt(EQUAL); |
| 2317 | } else { |
| 2318 | result = Smi::FromInt(NOT_EQUAL); |
| 2319 | } |
| 2320 | return result; |
| 2321 | } |
| 2322 | |
| 2323 | |
| 2324 | static Object* Runtime_StringEquals(Arguments args) { |
| 2325 | NoHandleAllocation ha; |
| 2326 | ASSERT(args.length() == 2); |
| 2327 | |
| 2328 | CONVERT_CHECKED(String, x, args[0]); |
| 2329 | CONVERT_CHECKED(String, y, args[1]); |
| 2330 | |
| 2331 | // This is very similar to String::Equals(String*) but that version |
| 2332 | // requires flattened strings as input, whereas we flatten the |
| 2333 | // strings only if the fast cases fail. Note that this may fail, |
| 2334 | // requiring a GC. String::Equals(String*) returns a bool and has |
| 2335 | // no way to signal a failure. |
| 2336 | if (y == x) return Smi::FromInt(EQUAL); |
| 2337 | if (x->IsSymbol() && y->IsSymbol()) return Smi::FromInt(NOT_EQUAL); |
| 2338 | // Compare contents |
| 2339 | int len = x->length(); |
| 2340 | if (len != y->length()) return Smi::FromInt(NOT_EQUAL); |
| 2341 | if (len == 0) return Smi::FromInt(EQUAL); |
| 2342 | // Fast case: First, middle and last characters. |
| 2343 | if (x->Get(0) != y->Get(0)) return Smi::FromInt(NOT_EQUAL); |
| 2344 | if (x->Get(len>>1) != y->Get(len>>1)) return Smi::FromInt(NOT_EQUAL); |
| 2345 | if (x->Get(len - 1) != y->Get(len - 1)) return Smi::FromInt(NOT_EQUAL); |
| 2346 | |
| 2347 | x->TryFlatten(); |
| 2348 | y->TryFlatten(); |
| 2349 | |
| 2350 | static StringInputBuffer buf1; |
| 2351 | static StringInputBuffer buf2; |
| 2352 | buf1.Reset(x); |
| 2353 | buf2.Reset(y); |
| 2354 | while (buf1.has_more()) { |
| 2355 | if (buf1.GetNext() != buf2.GetNext()) |
| 2356 | return Smi::FromInt(NOT_EQUAL); |
| 2357 | } |
| 2358 | return Smi::FromInt(EQUAL); |
| 2359 | } |
| 2360 | |
| 2361 | |
| 2362 | static Object* Runtime_NumberCompare(Arguments args) { |
| 2363 | NoHandleAllocation ha; |
| 2364 | ASSERT(args.length() == 3); |
| 2365 | |
| 2366 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2367 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2368 | if (isnan(x) || isnan(y)) return args[2]; |
| 2369 | if (x == y) return Smi::FromInt(EQUAL); |
| 2370 | if (isless(x, y)) return Smi::FromInt(LESS); |
| 2371 | return Smi::FromInt(GREATER); |
| 2372 | } |
| 2373 | |
| 2374 | |
| 2375 | static Object* Runtime_StringCompare(Arguments args) { |
| 2376 | NoHandleAllocation ha; |
| 2377 | ASSERT(args.length() == 2); |
| 2378 | |
| 2379 | CONVERT_CHECKED(String, x, args[0]); |
| 2380 | CONVERT_CHECKED(String, y, args[1]); |
| 2381 | |
| 2382 | // A few fast case tests before we flatten. |
| 2383 | if (x == y) return Smi::FromInt(EQUAL); |
| 2384 | if (y->length() == 0) { |
| 2385 | if (x->length() == 0) |
| 2386 | return Smi::FromInt(EQUAL); |
| 2387 | return Smi::FromInt(GREATER); |
| 2388 | } else if (x->length() == 0) { |
| 2389 | return Smi::FromInt(LESS); |
| 2390 | } |
| 2391 | { |
| 2392 | int d = x->Get(0) - y->Get(0); |
| 2393 | if (d < 0) return Smi::FromInt(LESS); |
| 2394 | else if (d > 0) return Smi::FromInt(GREATER); |
| 2395 | } |
| 2396 | |
| 2397 | x->TryFlatten(); |
| 2398 | y->TryFlatten(); |
| 2399 | |
| 2400 | static StringInputBuffer bufx; |
| 2401 | static StringInputBuffer bufy; |
| 2402 | bufx.Reset(x); |
| 2403 | bufy.Reset(y); |
| 2404 | while (bufx.has_more() && bufy.has_more()) { |
| 2405 | int d = bufx.GetNext() - bufy.GetNext(); |
| 2406 | if (d < 0) return Smi::FromInt(LESS); |
| 2407 | else if (d > 0) return Smi::FromInt(GREATER); |
| 2408 | } |
| 2409 | |
| 2410 | // x is (non-trivial) prefix of y: |
| 2411 | if (bufy.has_more()) return Smi::FromInt(LESS); |
| 2412 | // y is prefix of x: |
| 2413 | return Smi::FromInt(bufx.has_more() ? GREATER : EQUAL); |
| 2414 | } |
| 2415 | |
| 2416 | |
| 2417 | static Object* Runtime_Math_abs(Arguments args) { |
| 2418 | NoHandleAllocation ha; |
| 2419 | ASSERT(args.length() == 1); |
| 2420 | |
| 2421 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2422 | return Heap::AllocateHeapNumber(fabs(x)); |
| 2423 | } |
| 2424 | |
| 2425 | |
| 2426 | static Object* Runtime_Math_acos(Arguments args) { |
| 2427 | NoHandleAllocation ha; |
| 2428 | ASSERT(args.length() == 1); |
| 2429 | |
| 2430 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2431 | return Heap::AllocateHeapNumber(acos(x)); |
| 2432 | } |
| 2433 | |
| 2434 | |
| 2435 | static Object* Runtime_Math_asin(Arguments args) { |
| 2436 | NoHandleAllocation ha; |
| 2437 | ASSERT(args.length() == 1); |
| 2438 | |
| 2439 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2440 | return Heap::AllocateHeapNumber(asin(x)); |
| 2441 | } |
| 2442 | |
| 2443 | |
| 2444 | static Object* Runtime_Math_atan(Arguments args) { |
| 2445 | NoHandleAllocation ha; |
| 2446 | ASSERT(args.length() == 1); |
| 2447 | |
| 2448 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2449 | return Heap::AllocateHeapNumber(atan(x)); |
| 2450 | } |
| 2451 | |
| 2452 | |
| 2453 | static Object* Runtime_Math_atan2(Arguments args) { |
| 2454 | NoHandleAllocation ha; |
| 2455 | ASSERT(args.length() == 2); |
| 2456 | |
| 2457 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2458 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2459 | double result; |
| 2460 | if (isinf(x) && isinf(y)) { |
| 2461 | // Make sure that the result in case of two infinite arguments |
| 2462 | // is a multiple of Pi / 4. The sign of the result is determined |
| 2463 | // by the first argument (x) and the sign of the second argument |
| 2464 | // determines the multiplier: one or three. |
| 2465 | static double kPiDividedBy4 = 0.78539816339744830962; |
| 2466 | int multiplier = (x < 0) ? -1 : 1; |
| 2467 | if (y < 0) multiplier *= 3; |
| 2468 | result = multiplier * kPiDividedBy4; |
| 2469 | } else { |
| 2470 | result = atan2(x, y); |
| 2471 | } |
| 2472 | return Heap::AllocateHeapNumber(result); |
| 2473 | } |
| 2474 | |
| 2475 | |
| 2476 | static Object* Runtime_Math_ceil(Arguments args) { |
| 2477 | NoHandleAllocation ha; |
| 2478 | ASSERT(args.length() == 1); |
| 2479 | |
| 2480 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2481 | return Heap::NumberFromDouble(ceiling(x)); |
| 2482 | } |
| 2483 | |
| 2484 | |
| 2485 | static Object* Runtime_Math_cos(Arguments args) { |
| 2486 | NoHandleAllocation ha; |
| 2487 | ASSERT(args.length() == 1); |
| 2488 | |
| 2489 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2490 | return Heap::AllocateHeapNumber(cos(x)); |
| 2491 | } |
| 2492 | |
| 2493 | |
| 2494 | static Object* Runtime_Math_exp(Arguments args) { |
| 2495 | NoHandleAllocation ha; |
| 2496 | ASSERT(args.length() == 1); |
| 2497 | |
| 2498 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2499 | return Heap::AllocateHeapNumber(exp(x)); |
| 2500 | } |
| 2501 | |
| 2502 | |
| 2503 | static Object* Runtime_Math_floor(Arguments args) { |
| 2504 | NoHandleAllocation ha; |
| 2505 | ASSERT(args.length() == 1); |
| 2506 | |
| 2507 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2508 | return Heap::NumberFromDouble(floor(x)); |
| 2509 | } |
| 2510 | |
| 2511 | |
| 2512 | static Object* Runtime_Math_log(Arguments args) { |
| 2513 | NoHandleAllocation ha; |
| 2514 | ASSERT(args.length() == 1); |
| 2515 | |
| 2516 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2517 | return Heap::AllocateHeapNumber(log(x)); |
| 2518 | } |
| 2519 | |
| 2520 | |
| 2521 | static Object* Runtime_Math_pow(Arguments args) { |
| 2522 | NoHandleAllocation ha; |
| 2523 | ASSERT(args.length() == 2); |
| 2524 | |
| 2525 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2526 | CONVERT_DOUBLE_CHECKED(y, args[1]); |
| 2527 | if (isnan(y) || ((x == 1 || x == -1) && isinf(y))) { |
| 2528 | return Heap::nan_value(); |
| 2529 | } else if (y == 0) { |
| 2530 | return Smi::FromInt(1); |
| 2531 | } else { |
| 2532 | return Heap::AllocateHeapNumber(pow(x, y)); |
| 2533 | } |
| 2534 | } |
| 2535 | |
| 2536 | // Returns a number value with positive sign, greater than or equal to |
| 2537 | // 0 but less than 1, chosen randomly. |
| 2538 | static Object* Runtime_Math_random(Arguments) { |
| 2539 | NoHandleAllocation ha; |
| 2540 | |
| 2541 | // To get much better precision, we combine the results of two |
| 2542 | // invocations of random(). The result is computed by normalizing a |
| 2543 | // double in the range [0, RAND_MAX + 1) obtained by adding the |
| 2544 | // high-order bits in the range [0, RAND_MAX] with the low-order |
| 2545 | // bits in the range [0, 1). |
| 2546 | double lo = static_cast<double>(random()) / (RAND_MAX + 1.0); |
| 2547 | double hi = static_cast<double>(random()); |
| 2548 | double result = (hi + lo) / (RAND_MAX + 1.0); |
| 2549 | ASSERT(result >= 0 && result < 1); |
| 2550 | return Heap::AllocateHeapNumber(result); |
| 2551 | } |
| 2552 | |
| 2553 | |
| 2554 | static Object* Runtime_Math_round(Arguments args) { |
| 2555 | NoHandleAllocation ha; |
| 2556 | ASSERT(args.length() == 1); |
| 2557 | |
| 2558 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2559 | if (signbit(x) && x >= -0.5) return Heap::minus_zero_value(); |
| 2560 | return Heap::NumberFromDouble(floor(x + 0.5)); |
| 2561 | } |
| 2562 | |
| 2563 | |
| 2564 | static Object* Runtime_Math_sin(Arguments args) { |
| 2565 | NoHandleAllocation ha; |
| 2566 | ASSERT(args.length() == 1); |
| 2567 | |
| 2568 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2569 | return Heap::AllocateHeapNumber(sin(x)); |
| 2570 | } |
| 2571 | |
| 2572 | |
| 2573 | static Object* Runtime_Math_sqrt(Arguments args) { |
| 2574 | NoHandleAllocation ha; |
| 2575 | ASSERT(args.length() == 1); |
| 2576 | |
| 2577 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2578 | return Heap::AllocateHeapNumber(sqrt(x)); |
| 2579 | } |
| 2580 | |
| 2581 | |
| 2582 | static Object* Runtime_Math_tan(Arguments args) { |
| 2583 | NoHandleAllocation ha; |
| 2584 | ASSERT(args.length() == 1); |
| 2585 | |
| 2586 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 2587 | return Heap::AllocateHeapNumber(tan(x)); |
| 2588 | } |
| 2589 | |
| 2590 | |
| 2591 | static Object* Runtime_NewArguments(Arguments args) { |
| 2592 | NoHandleAllocation ha; |
| 2593 | ASSERT(args.length() == 1); |
| 2594 | |
| 2595 | // ECMA-262, 3rd., 10.1.8, p.39 |
| 2596 | CONVERT_CHECKED(JSFunction, callee, args[0]); |
| 2597 | |
| 2598 | // Compute the frame holding the arguments. |
| 2599 | JavaScriptFrameIterator it; |
| 2600 | it.AdvanceToArgumentsFrame(); |
| 2601 | JavaScriptFrame* frame = it.frame(); |
| 2602 | |
| 2603 | const int length = frame->GetProvidedParametersCount(); |
| 2604 | Object* result = Heap::AllocateArgumentsObject(callee, length); |
| 2605 | if (result->IsFailure()) return result; |
| 2606 | FixedArray* array = FixedArray::cast(JSObject::cast(result)->elements()); |
| 2607 | ASSERT(array->length() == length); |
| 2608 | for (int i = 0; i < length; i++) { |
| 2609 | array->set(i, frame->GetParameter(i)); |
| 2610 | } |
| 2611 | return result; |
| 2612 | } |
| 2613 | |
| 2614 | |
| 2615 | static Object* Runtime_NewClosure(Arguments args) { |
| 2616 | HandleScope scope; |
| 2617 | ASSERT(args.length() == 2); |
| 2618 | CONVERT_ARG_CHECKED(JSFunction, boilerplate, 0); |
| 2619 | CONVERT_ARG_CHECKED(Context, context, 1); |
| 2620 | |
| 2621 | Handle<JSFunction> result = |
| 2622 | Factory::NewFunctionFromBoilerplate(boilerplate, context); |
| 2623 | return *result; |
| 2624 | } |
| 2625 | |
| 2626 | |
| 2627 | static Object* Runtime_NewObject(Arguments args) { |
| 2628 | NoHandleAllocation ha; |
| 2629 | ASSERT(args.length() == 1); |
| 2630 | |
| 2631 | Object* constructor = args[0]; |
| 2632 | if (constructor->IsJSFunction()) { |
| 2633 | JSFunction* function = JSFunction::cast(constructor); |
| 2634 | |
| 2635 | // Handle steping into constructors. |
| 2636 | if (Debug::StepInActive()) { |
| 2637 | StackFrameIterator it; |
| 2638 | it.Advance(); |
| 2639 | ASSERT(InternalFrame::cast(it.frame())->is_construct_trampoline()); |
| 2640 | it.Advance(); |
| 2641 | if (it.frame()->fp() == Debug::step_in_fp()) { |
| 2642 | HandleScope scope; |
| 2643 | Debug::FloodWithOneShot(Handle<SharedFunctionInfo>(function->shared())); |
| 2644 | } |
| 2645 | } |
| 2646 | |
| 2647 | if (function->has_initial_map() && |
| 2648 | function->initial_map()->instance_type() == JS_FUNCTION_TYPE) { |
| 2649 | // The 'Function' function ignores the receiver object when |
| 2650 | // called using 'new' and creates a new JSFunction object that |
| 2651 | // is returned. The receiver object is only used for error |
| 2652 | // reporting if an error occurs when constructing the new |
| 2653 | // JSFunction. AllocateJSObject should not be used to allocate |
| 2654 | // JSFunctions since it does not properly initialize the shared |
| 2655 | // part of the function. Since the receiver is ignored anyway, |
| 2656 | // we use the global object as the receiver instead of a new |
| 2657 | // JSFunction object. This way, errors are reported the same |
| 2658 | // way whether or not 'Function' is called using 'new'. |
| 2659 | return Top::context()->global(); |
| 2660 | } |
| 2661 | return Heap::AllocateJSObject(function); |
| 2662 | } |
| 2663 | |
| 2664 | HandleScope scope; |
| 2665 | Handle<Object> cons(constructor); |
| 2666 | // The constructor is not a function; throw a type error. |
| 2667 | Handle<Object> type_error = |
| 2668 | Factory::NewTypeError("not_constructor", HandleVector(&cons, 1)); |
| 2669 | return Top::Throw(*type_error); |
| 2670 | } |
| 2671 | |
| 2672 | |
| 2673 | #ifdef DEBUG |
| 2674 | DEFINE_bool(trace_lazy, false, "trace lazy compilation"); |
| 2675 | #endif |
| 2676 | |
| 2677 | |
| 2678 | static Object* Runtime_LazyCompile(Arguments args) { |
| 2679 | HandleScope scope; |
| 2680 | ASSERT(args.length() == 1); |
| 2681 | |
| 2682 | Handle<JSFunction> function = args.at<JSFunction>(0); |
| 2683 | #ifdef DEBUG |
| 2684 | if (FLAG_trace_lazy) { |
| 2685 | PrintF("[lazy: "); |
| 2686 | function->shared()->name()->Print(); |
| 2687 | PrintF("]\n"); |
| 2688 | } |
| 2689 | #endif |
| 2690 | |
| 2691 | // Compile the target function. |
| 2692 | ASSERT(!function->is_compiled()); |
| 2693 | if (!CompileLazy(function, KEEP_EXCEPTION)) { |
| 2694 | return Failure::Exception(); |
| 2695 | } |
| 2696 | |
| 2697 | return function->code(); |
| 2698 | } |
| 2699 | |
| 2700 | |
| 2701 | static Object* Runtime_GetCalledFunction(Arguments args) { |
| 2702 | HandleScope scope; |
| 2703 | ASSERT(args.length() == 1); |
| 2704 | StackFrameIterator it; |
| 2705 | // Get past the JS-to-C exit frame. |
| 2706 | ASSERT(it.frame()->is_exit()); |
| 2707 | it.Advance(); |
| 2708 | // Get past the CALL_NON_FUNCTION activation frame. |
| 2709 | ASSERT(it.frame()->is_java_script()); |
| 2710 | it.Advance(); |
| 2711 | // Argument adaptor frames do not copy the function; we have to skip |
| 2712 | // past them to get to the real calling frame. |
| 2713 | if (it.frame()->is_arguments_adaptor()) it.Advance(); |
| 2714 | // Get the function from the top of the expression stack of the |
| 2715 | // calling frame. |
| 2716 | StandardFrame* frame = StandardFrame::cast(it.frame()); |
| 2717 | int index = frame->ComputeExpressionsCount() - 1; |
| 2718 | Object* result = frame->GetExpression(index); |
| 2719 | return result; |
| 2720 | } |
| 2721 | |
| 2722 | |
| 2723 | static Object* Runtime_GetFunctionDelegate(Arguments args) { |
| 2724 | HandleScope scope; |
| 2725 | ASSERT(args.length() == 1); |
| 2726 | RUNTIME_ASSERT(!args[0]->IsJSFunction()); |
| 2727 | return *Execution::GetFunctionDelegate(args.at<Object>(0)); |
| 2728 | } |
| 2729 | |
| 2730 | |
| 2731 | static Object* Runtime_NewContext(Arguments args) { |
| 2732 | NoHandleAllocation ha; |
| 2733 | ASSERT(args.length() == 2); |
| 2734 | |
| 2735 | CONVERT_CHECKED(JSFunction, function, args[1]); |
| 2736 | int length = ScopeInfo<>::NumberOfContextSlots(function->code()); |
| 2737 | Object* result = Heap::AllocateFunctionContext(length, function); |
| 2738 | if (result->IsFailure()) return result; |
| 2739 | |
| 2740 | Top::set_context(Context::cast(result)); |
| 2741 | |
| 2742 | return args[0]; // return TOS |
| 2743 | } |
| 2744 | |
| 2745 | |
| 2746 | static Object* Runtime_PushContext(Arguments args) { |
| 2747 | NoHandleAllocation ha; |
| 2748 | ASSERT(args.length() == 2); |
| 2749 | |
| 2750 | // Convert the object to a proper JavaScript object. |
| 2751 | Object* object = args[1]; |
| 2752 | if (!object->IsJSObject()) { |
| 2753 | object = object->ToObject(); |
| 2754 | if (object->IsFailure()) { |
| 2755 | if (!Failure::cast(object)->IsInternalError()) return object; |
| 2756 | HandleScope scope; |
| 2757 | Handle<Object> handle(args[1]); |
| 2758 | Handle<Object> result = |
| 2759 | Factory::NewTypeError("with_expression", HandleVector(&handle, 1)); |
| 2760 | return Top::Throw(*result); |
| 2761 | } |
| 2762 | } |
| 2763 | |
| 2764 | Object* result = |
| 2765 | Heap::AllocateWithContext(Top::context(), JSObject::cast(object)); |
| 2766 | if (result->IsFailure()) return result; |
| 2767 | |
| 2768 | Top::set_context(Context::cast(result)); |
| 2769 | |
| 2770 | return args[0]; // return TOS |
| 2771 | } |
| 2772 | |
| 2773 | |
| 2774 | static Object* Runtime_LookupContext(Arguments args) { |
| 2775 | HandleScope scope; |
| 2776 | ASSERT(args.length() == 2); |
| 2777 | |
| 2778 | CONVERT_ARG_CHECKED(Context, context, 0); |
| 2779 | CONVERT_ARG_CHECKED(String, name, 1); |
| 2780 | |
| 2781 | int index; |
| 2782 | PropertyAttributes attributes; |
| 2783 | ContextLookupFlags flags = FOLLOW_CHAINS; |
| 2784 | Handle<Object> context_obj = |
| 2785 | context->Lookup(name, flags, &index, &attributes); |
| 2786 | |
| 2787 | if (index < 0 && *context_obj != NULL) { |
| 2788 | ASSERT(context_obj->IsJSObject()); |
| 2789 | return *context_obj; |
| 2790 | } |
| 2791 | |
| 2792 | // No intermediate context found. Use global object by default. |
| 2793 | return Top::context()->global(); |
| 2794 | } |
| 2795 | |
| 2796 | |
| 2797 | |
| 2798 | |
| 2799 | // A mechanism to return pairs of Object*'s. This is somewhat |
| 2800 | // compiler-dependent as it assumes that a 64-bit value (a long long) |
| 2801 | // is returned via two registers (edx:eax on ia32). Both the ia32 and |
| 2802 | // arm platform support this; it is mostly an issue of "coaxing" the |
| 2803 | // compiler to do the right thing. |
| 2804 | // |
| 2805 | // TODO(1236026): This is a non-portable hack that should be removed. |
| 2806 | typedef uint64_t ObjPair; |
| 2807 | ObjPair MakePair(Object* x, Object* y) { |
| 2808 | return reinterpret_cast<uint32_t>(x) | |
| 2809 | (reinterpret_cast<ObjPair>(y) << 32); |
| 2810 | } |
| 2811 | |
| 2812 | |
| 2813 | static Object* Unhole(Object* x, PropertyAttributes attributes) { |
| 2814 | ASSERT(!x->IsTheHole() || (attributes & READ_ONLY) != 0); |
| 2815 | USE(attributes); |
| 2816 | return x->IsTheHole() ? Heap::undefined_value() : x; |
| 2817 | } |
| 2818 | |
| 2819 | |
| 2820 | static ObjPair LoadContextSlotHelper(Arguments args, bool throw_error) { |
| 2821 | HandleScope scope; |
| 2822 | ASSERT(args.length() == 2); |
| 2823 | |
| 2824 | if (!args[0]->IsContext()) return MakePair(IllegalOperation(), NULL); |
| 2825 | Handle<Context> context = args.at<Context>(0); |
| 2826 | Handle<String> name(String::cast(args[1])); |
| 2827 | |
| 2828 | int index; |
| 2829 | PropertyAttributes attributes; |
| 2830 | ContextLookupFlags flags = FOLLOW_CHAINS; |
| 2831 | Handle<Object> context_obj = |
| 2832 | context->Lookup(name, flags, &index, &attributes); |
| 2833 | |
| 2834 | if (index >= 0) { |
| 2835 | if (context_obj->IsContext()) { |
| 2836 | // The context is an Execution context, and the "property" we were looking |
| 2837 | // for is a local variable in that context. According to ECMA-262, 3rd., |
| 2838 | // 10.1.6 and 10.2.3, the receiver is the global object. |
| 2839 | return MakePair( |
| 2840 | Unhole(Handle<Context>::cast(context_obj)->get(index), attributes), |
| 2841 | Top::context()->global()); |
| 2842 | } else { |
| 2843 | return MakePair( |
| 2844 | Unhole(Handle<JSObject>::cast(context_obj)->GetElement(index), |
| 2845 | attributes), |
| 2846 | *context_obj); |
| 2847 | } |
| 2848 | } |
| 2849 | |
| 2850 | if (*context_obj != NULL) { |
| 2851 | ASSERT(Handle<JSObject>::cast(context_obj)->HasProperty(*name)); |
| 2852 | // Note: As of 5/29/2008, GetProperty does the "unholing" and so this call |
| 2853 | // here is redundant. We left it anyway, to be explicit; also it's not clear |
| 2854 | // why GetProperty should do the unholing in the first place. |
| 2855 | return MakePair( |
| 2856 | Unhole(Handle<JSObject>::cast(context_obj)->GetProperty(*name), |
| 2857 | attributes), |
| 2858 | *context_obj); |
| 2859 | } |
| 2860 | |
| 2861 | if (throw_error) { |
| 2862 | // The property doesn't exist - throw exception. |
| 2863 | Handle<Object> reference_error = |
| 2864 | Factory::NewReferenceError("not_defined", HandleVector(&name, 1)); |
| 2865 | return MakePair(Top::Throw(*reference_error), NULL); |
| 2866 | } else { |
| 2867 | // The property doesn't exist - return undefined |
| 2868 | return MakePair(Heap::undefined_value(), Heap::undefined_value()); |
| 2869 | } |
| 2870 | } |
| 2871 | |
| 2872 | |
| 2873 | static ObjPair Runtime_LoadContextSlot(Arguments args) { |
| 2874 | return LoadContextSlotHelper(args, true); |
| 2875 | } |
| 2876 | |
| 2877 | |
| 2878 | static ObjPair Runtime_LoadContextSlotNoReferenceError(Arguments args) { |
| 2879 | return LoadContextSlotHelper(args, false); |
| 2880 | } |
| 2881 | |
| 2882 | |
| 2883 | static Object* Runtime_StoreContextSlot(Arguments args) { |
| 2884 | HandleScope scope; |
| 2885 | ASSERT(args.length() == 3); |
| 2886 | |
| 2887 | Handle<Object> value(args[0]); |
| 2888 | CONVERT_ARG_CHECKED(Context, context, 1); |
| 2889 | Handle<String> name(String::cast(args[2])); |
| 2890 | |
| 2891 | int index; |
| 2892 | PropertyAttributes attributes; |
| 2893 | ContextLookupFlags flags = FOLLOW_CHAINS; |
| 2894 | Handle<Object> context_obj = |
| 2895 | context->Lookup(name, flags, &index, &attributes); |
| 2896 | |
| 2897 | if (index >= 0) { |
| 2898 | if (context_obj->IsContext()) { |
| 2899 | // Ignore if read_only variable. |
| 2900 | if ((attributes & READ_ONLY) == 0) { |
| 2901 | Handle<Context>::cast(context_obj)->set(index, *value); |
| 2902 | } |
| 2903 | } else { |
| 2904 | ASSERT((attributes & READ_ONLY) == 0); |
| 2905 | Object* result = |
| 2906 | Handle<JSObject>::cast(context_obj)->SetElement(index, *value); |
| 2907 | USE(result); |
| 2908 | ASSERT(!result->IsFailure()); |
| 2909 | } |
| 2910 | return *value; |
| 2911 | } |
| 2912 | |
| 2913 | // Slow case: The property is not in a FixedArray context. |
| 2914 | // It is either in an JSObject extension context or it was not found. |
| 2915 | Handle<JSObject> context_ext; |
| 2916 | |
| 2917 | if (*context_obj != NULL) { |
| 2918 | // The property exists in the extension context. |
| 2919 | context_ext = Handle<JSObject>::cast(context_obj); |
| 2920 | } else { |
| 2921 | // The property was not found. It needs to be stored in the global context. |
| 2922 | ASSERT(attributes == ABSENT); |
| 2923 | attributes = NONE; |
| 2924 | context_ext = Handle<JSObject>(Top::context()->global()); |
| 2925 | } |
| 2926 | |
| 2927 | // Set the property, but ignore if read_only variable. |
| 2928 | if ((attributes & READ_ONLY) == 0) { |
| 2929 | Handle<Object> set = SetProperty(context_ext, name, value, attributes); |
| 2930 | if (set.is_null()) { |
| 2931 | // Failure::Exception is converted to a null handle in the |
| 2932 | // handle-based methods such as SetProperty. We therefore need |
| 2933 | // to convert null handles back to exceptions. |
| 2934 | ASSERT(Top::has_pending_exception()); |
| 2935 | return Failure::Exception(); |
| 2936 | } |
| 2937 | } |
| 2938 | return *value; |
| 2939 | } |
| 2940 | |
| 2941 | |
| 2942 | static Object* Runtime_Throw(Arguments args) { |
| 2943 | HandleScope scope; |
| 2944 | ASSERT(args.length() == 1); |
| 2945 | |
| 2946 | return Top::Throw(args[0]); |
| 2947 | } |
| 2948 | |
| 2949 | |
| 2950 | static Object* Runtime_ReThrow(Arguments args) { |
| 2951 | HandleScope scope; |
| 2952 | ASSERT(args.length() == 1); |
| 2953 | |
| 2954 | return Top::ReThrow(args[0]); |
| 2955 | } |
| 2956 | |
| 2957 | |
| 2958 | static Object* Runtime_ThrowReferenceError(Arguments args) { |
| 2959 | HandleScope scope; |
| 2960 | ASSERT(args.length() == 1); |
| 2961 | |
| 2962 | Handle<Object> name(args[0]); |
| 2963 | Handle<Object> reference_error = |
| 2964 | Factory::NewReferenceError("not_defined", HandleVector(&name, 1)); |
| 2965 | return Top::Throw(*reference_error); |
| 2966 | } |
| 2967 | |
| 2968 | |
| 2969 | static Object* Runtime_StackOverflow(Arguments args) { |
| 2970 | NoHandleAllocation na; |
| 2971 | return Top::StackOverflow(); |
| 2972 | } |
| 2973 | |
| 2974 | |
| 2975 | static Object* RuntimePreempt(Arguments args) { |
| 2976 | // Clear the preempt request flag. |
| 2977 | StackGuard::Continue(PREEMPT); |
| 2978 | |
| 2979 | ContextSwitcher::PreemptionReceived(); |
| 2980 | |
| 2981 | { |
| 2982 | v8::Unlocker unlocker; |
| 2983 | Thread::YieldCPU(); |
| 2984 | } |
| 2985 | |
| 2986 | return Heap::undefined_value(); |
| 2987 | } |
| 2988 | |
| 2989 | |
| 2990 | static Object* Runtime_DebugBreak(Arguments args) { |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 2991 | // Just continue if breaks are disabled. |
| 2992 | if (Debug::disable_break()) { |
| 2993 | return args[0]; |
| 2994 | } |
| 2995 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2996 | // Don't break in system functions. If the current function is either in the |
| 2997 | // builtins object of some context or is in the debug context just return with |
| 2998 | // the debug break stack guard active. |
| 2999 | JavaScriptFrameIterator it; |
| 3000 | JavaScriptFrame* frame = it.frame(); |
| 3001 | Object* fun = frame->function(); |
| 3002 | if (fun->IsJSFunction()) { |
| 3003 | GlobalObject* global = JSFunction::cast(fun)->context()->global(); |
| 3004 | if (global->IsJSBuiltinsObject() || Debug::IsDebugGlobal(global)) { |
| 3005 | return args[0]; |
| 3006 | } |
| 3007 | } |
| 3008 | |
| 3009 | // Clear the debug request flag. |
| 3010 | StackGuard::Continue(DEBUGBREAK); |
| 3011 | |
| 3012 | // Make sure debugger is loaded. |
| 3013 | if (!Debug::Load()) { |
| 3014 | return args[0]; |
| 3015 | } |
| 3016 | |
| 3017 | HandleScope scope; |
| 3018 | SaveBreakFrame save; |
| 3019 | EnterDebuggerContext enter; |
| 3020 | |
| 3021 | // Process debug requests. Returns true if break request. |
| 3022 | bool break_request = Debugger::ProcessPendingRequests(); |
| 3023 | |
| 3024 | // Notify the debug event listeners if break request. |
| 3025 | if (break_request) { |
| 3026 | Debugger::OnDebugBreak(Factory::undefined_value()); |
| 3027 | } |
| 3028 | |
| 3029 | // Return to continue execution. |
| 3030 | return args[0]; |
| 3031 | } |
| 3032 | |
| 3033 | |
| 3034 | static Object* Runtime_StackGuard(Arguments args) { |
| 3035 | ASSERT(args.length() == 1); |
| 3036 | |
| 3037 | // First check if this is a real stack overflow. |
| 3038 | if (StackGuard::IsStackOverflow()) return Runtime_StackOverflow(args); |
| 3039 | |
| 3040 | // If not real stack overflow the stack guard was used to interrupt |
| 3041 | // execution for another purpose. |
| 3042 | if (StackGuard::IsDebugBreak()) Runtime_DebugBreak(args); |
| 3043 | if (StackGuard::IsPreempted()) RuntimePreempt(args); |
| 3044 | if (StackGuard::IsInterrupted()) { |
| 3045 | // interrupt |
| 3046 | StackGuard::Continue(INTERRUPT); |
| 3047 | return Top::StackOverflow(); |
| 3048 | } |
| 3049 | return Heap::undefined_value(); |
| 3050 | } |
| 3051 | |
| 3052 | |
| 3053 | // NOTE: These PrintXXX functions are defined for all builds (not just |
| 3054 | // DEBUG builds) because we may want to be able to trace function |
| 3055 | // calls in all modes. |
| 3056 | static void PrintString(String* str) { |
| 3057 | // not uncommon to have empty strings |
| 3058 | if (str->length() > 0) { |
| 3059 | SmartPointer<char> s = |
| 3060 | str->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL); |
| 3061 | PrintF("%s", *s); |
| 3062 | } |
| 3063 | } |
| 3064 | |
| 3065 | |
| 3066 | static void PrintObject(Object* obj) { |
| 3067 | if (obj->IsSmi()) { |
| 3068 | PrintF("%d", Smi::cast(obj)->value()); |
| 3069 | } else if (obj->IsString() || obj->IsSymbol()) { |
| 3070 | PrintString(String::cast(obj)); |
| 3071 | } else if (obj->IsNumber()) { |
| 3072 | PrintF("%g", obj->Number()); |
| 3073 | } else if (obj->IsFailure()) { |
| 3074 | PrintF("<failure>"); |
| 3075 | } else if (obj->IsUndefined()) { |
| 3076 | PrintF("<undefined>"); |
| 3077 | } else if (obj->IsNull()) { |
| 3078 | PrintF("<null>"); |
| 3079 | } else if (obj->IsTrue()) { |
| 3080 | PrintF("<true>"); |
| 3081 | } else if (obj->IsFalse()) { |
| 3082 | PrintF("<false>"); |
| 3083 | } else { |
| 3084 | PrintF("%p", obj); |
| 3085 | } |
| 3086 | } |
| 3087 | |
| 3088 | |
| 3089 | static int StackSize() { |
| 3090 | int n = 0; |
| 3091 | for (JavaScriptFrameIterator it; !it.done(); it.Advance()) n++; |
| 3092 | return n; |
| 3093 | } |
| 3094 | |
| 3095 | |
| 3096 | static void PrintTransition(Object* result) { |
| 3097 | // indentation |
| 3098 | { const int nmax = 80; |
| 3099 | int n = StackSize(); |
| 3100 | if (n <= nmax) |
| 3101 | PrintF("%4d:%*s", n, n, ""); |
| 3102 | else |
| 3103 | PrintF("%4d:%*s", n, nmax, "..."); |
| 3104 | } |
| 3105 | |
| 3106 | if (result == NULL) { |
| 3107 | // constructor calls |
| 3108 | JavaScriptFrameIterator it; |
| 3109 | JavaScriptFrame* frame = it.frame(); |
| 3110 | if (frame->IsConstructor()) PrintF("new "); |
| 3111 | // function name |
| 3112 | Object* fun = frame->function(); |
| 3113 | if (fun->IsJSFunction()) { |
| 3114 | PrintObject(JSFunction::cast(fun)->shared()->name()); |
| 3115 | } else { |
| 3116 | PrintObject(fun); |
| 3117 | } |
| 3118 | // function arguments |
| 3119 | // (we are intentionally only printing the actually |
| 3120 | // supplied parameters, not all parameters required) |
| 3121 | PrintF("(this="); |
| 3122 | PrintObject(frame->receiver()); |
| 3123 | const int length = frame->GetProvidedParametersCount(); |
| 3124 | for (int i = 0; i < length; i++) { |
| 3125 | PrintF(", "); |
| 3126 | PrintObject(frame->GetParameter(i)); |
| 3127 | } |
| 3128 | PrintF(") {\n"); |
| 3129 | |
| 3130 | } else { |
| 3131 | // function result |
| 3132 | PrintF("} -> "); |
| 3133 | PrintObject(result); |
| 3134 | PrintF("\n"); |
| 3135 | } |
| 3136 | } |
| 3137 | |
| 3138 | |
| 3139 | static Object* Runtime_TraceEnter(Arguments args) { |
| 3140 | NoHandleAllocation ha; |
| 3141 | PrintTransition(NULL); |
| 3142 | return args[0]; // return TOS |
| 3143 | } |
| 3144 | |
| 3145 | |
| 3146 | static Object* Runtime_TraceExit(Arguments args) { |
| 3147 | NoHandleAllocation ha; |
| 3148 | PrintTransition(args[0]); |
| 3149 | return args[0]; // return TOS |
| 3150 | } |
| 3151 | |
| 3152 | |
| 3153 | static Object* Runtime_DebugPrint(Arguments args) { |
| 3154 | NoHandleAllocation ha; |
| 3155 | ASSERT(args.length() == 1); |
| 3156 | |
| 3157 | #ifdef DEBUG |
| 3158 | if (args[0]->IsString()) { |
| 3159 | // If we have a string, assume it's a code "marker" |
| 3160 | // and print some interesting cpu debugging info. |
| 3161 | JavaScriptFrameIterator it; |
| 3162 | JavaScriptFrame* frame = it.frame(); |
| 3163 | PrintF("fp = %p, sp = %p, pp = %p: ", |
| 3164 | frame->fp(), frame->sp(), frame->pp()); |
| 3165 | } else { |
| 3166 | PrintF("DebugPrint: "); |
| 3167 | } |
| 3168 | args[0]->Print(); |
| 3169 | #else |
| 3170 | PrintF("DebugPrint: %p", args[0]); |
| 3171 | #endif |
| 3172 | PrintF("\n"); |
| 3173 | |
| 3174 | return args[0]; // return TOS |
| 3175 | } |
| 3176 | |
| 3177 | |
| 3178 | static Object* Runtime_DebugTrace(Arguments args) { |
| 3179 | ASSERT(args.length() == 1); |
| 3180 | NoHandleAllocation ha; |
| 3181 | Top::PrintStack(); |
| 3182 | return args[0]; // return TOS |
| 3183 | } |
| 3184 | |
| 3185 | |
| 3186 | static Object* Runtime_DateCurrentTime(Arguments) { |
| 3187 | NoHandleAllocation ha; |
| 3188 | |
| 3189 | // According to ECMA-262, section 15.9.1, page 117, the precision of |
| 3190 | // the number in a Date object representing a particular instant in |
| 3191 | // time is milliseconds. Therefore, we floor the result of getting |
| 3192 | // the OS time. |
| 3193 | double millis = floor(OS::TimeCurrentMillis()); |
| 3194 | return Heap::NumberFromDouble(millis); |
| 3195 | } |
| 3196 | |
| 3197 | |
| 3198 | static Object* Runtime_DateParseString(Arguments args) { |
| 3199 | HandleScope scope; |
| 3200 | ASSERT(args.length() == 1); |
| 3201 | |
| 3202 | CONVERT_CHECKED(String, string_object, args[0]); |
| 3203 | |
| 3204 | Handle<String> str(string_object); |
| 3205 | Handle<FixedArray> output = Factory::NewFixedArray(DateParser::OUTPUT_SIZE); |
| 3206 | if (DateParser::Parse(*str, *output)) { |
| 3207 | return *Factory::NewJSArrayWithElements(output); |
| 3208 | } else { |
| 3209 | return *Factory::null_value(); |
| 3210 | } |
| 3211 | } |
| 3212 | |
| 3213 | |
| 3214 | static Object* Runtime_DateLocalTimezone(Arguments args) { |
| 3215 | NoHandleAllocation ha; |
| 3216 | ASSERT(args.length() == 1); |
| 3217 | |
| 3218 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 3219 | char* zone = OS::LocalTimezone(x); |
| 3220 | return Heap::AllocateStringFromUtf8(CStrVector(zone)); |
| 3221 | } |
| 3222 | |
| 3223 | |
| 3224 | static Object* Runtime_DateLocalTimeOffset(Arguments args) { |
| 3225 | NoHandleAllocation ha; |
| 3226 | ASSERT(args.length() == 1); |
| 3227 | |
| 3228 | return Heap::NumberFromDouble(OS::LocalTimeOffset()); |
| 3229 | } |
| 3230 | |
| 3231 | |
| 3232 | static Object* Runtime_DateDaylightSavingsOffset(Arguments args) { |
| 3233 | NoHandleAllocation ha; |
| 3234 | ASSERT(args.length() == 1); |
| 3235 | |
| 3236 | CONVERT_DOUBLE_CHECKED(x, args[0]); |
| 3237 | return Heap::NumberFromDouble(OS::DaylightSavingsOffset(x)); |
| 3238 | } |
| 3239 | |
| 3240 | |
| 3241 | |
| 3242 | static Object* Runtime_NumberIsNaN(Arguments args) { |
| 3243 | NoHandleAllocation ha; |
| 3244 | ASSERT(args.length() == 1); |
| 3245 | |
| 3246 | CONVERT_DOUBLE_CHECKED(value, args[0]); |
| 3247 | if (isnan(value)) { |
| 3248 | return Heap::true_value(); |
| 3249 | } else { |
| 3250 | return Heap::false_value(); |
| 3251 | } |
| 3252 | } |
| 3253 | |
| 3254 | |
| 3255 | static Object* Runtime_NumberIsFinite(Arguments args) { |
| 3256 | NoHandleAllocation ha; |
| 3257 | ASSERT(args.length() == 1); |
| 3258 | |
| 3259 | CONVERT_DOUBLE_CHECKED(value, args[0]); |
| 3260 | Object* result; |
| 3261 | if (isnan(value) || (fpclassify(value) == FP_INFINITE)) { |
| 3262 | result = Heap::false_value(); |
| 3263 | } else { |
| 3264 | result = Heap::true_value(); |
| 3265 | } |
| 3266 | return result; |
| 3267 | } |
| 3268 | |
| 3269 | |
| 3270 | static Object* Runtime_NumberMaxValue(Arguments) { |
| 3271 | NoHandleAllocation ha; |
| 3272 | |
| 3273 | return Heap::number_max_value(); |
| 3274 | } |
| 3275 | |
| 3276 | |
| 3277 | static Object* Runtime_NumberMinValue(Arguments) { |
| 3278 | NoHandleAllocation ha; |
| 3279 | |
| 3280 | return Heap::number_min_value(); |
| 3281 | } |
| 3282 | |
| 3283 | |
| 3284 | static Object* Runtime_NumberNaN(Arguments) { |
| 3285 | NoHandleAllocation ha; |
| 3286 | |
| 3287 | return Heap::nan_value(); |
| 3288 | } |
| 3289 | |
| 3290 | |
| 3291 | static Object* Runtime_NumberNegativeInfinity(Arguments) { |
| 3292 | NoHandleAllocation ha; |
| 3293 | |
| 3294 | return Heap::negative_infinity_value(); |
| 3295 | } |
| 3296 | |
| 3297 | |
| 3298 | static Object* Runtime_NumberPositiveInfinity(Arguments) { |
| 3299 | NoHandleAllocation ha; |
| 3300 | |
| 3301 | return Heap::infinity_value(); |
| 3302 | } |
| 3303 | |
| 3304 | |
| 3305 | static Object* EvalContext() { |
| 3306 | // The topmost JS frame belongs to the eval function which called |
| 3307 | // the CompileString runtime function. We need to unwind one level |
| 3308 | // to get to the caller of eval. |
| 3309 | StackFrameLocator locator; |
| 3310 | JavaScriptFrame* frame = locator.FindJavaScriptFrame(1); |
| 3311 | |
| 3312 | // Check if the caller of eval() supports eval. If not, eval is |
| 3313 | // called through an alias in which case we throw an EvalError. |
| 3314 | HandleScope scope; |
| 3315 | if (!ScopeInfo<>::SupportsEval(frame->FindCode())) { |
| 3316 | Handle<Object> error = |
| 3317 | Factory::NewEvalError("illegal_eval", HandleVector<Object>(NULL, 0)); |
| 3318 | return Top::Throw(*error); |
| 3319 | } |
| 3320 | |
| 3321 | // Fetch the caller context from the frame. |
| 3322 | Handle<Context> caller(Context::cast(frame->context())); |
| 3323 | |
| 3324 | // Check for eval() invocations that cross environments. Use the |
| 3325 | // context from the stack if evaluating in current environment. |
| 3326 | Handle<Context> target = Top::global_context(); |
| 3327 | if (caller->global_context() == *target) return *caller; |
| 3328 | |
| 3329 | // Compute a function closure that captures the calling context. We |
| 3330 | // need a function that has trivial scope info, since it is only |
| 3331 | // used to hold the context chain together. |
| 3332 | Handle<JSFunction> closure = Factory::NewFunction(Factory::empty_symbol(), |
| 3333 | Factory::undefined_value()); |
| 3334 | closure->set_context(*caller); |
| 3335 | |
| 3336 | // Create a new adaptor context that has the target environment as |
| 3337 | // the extension object. This enables the evaluated code to see both |
| 3338 | // the current context with locals and everything and to see global |
| 3339 | // variables declared in the target global object. Furthermore, any |
| 3340 | // properties introduced with 'var' will be added to the target |
| 3341 | // global object because it is the extension object. |
| 3342 | Handle<Context> adaptor = |
| 3343 | Factory::NewFunctionContext(Context::MIN_CONTEXT_SLOTS, closure); |
| 3344 | adaptor->set_extension(target->global()); |
| 3345 | return *adaptor; |
| 3346 | } |
| 3347 | |
| 3348 | |
| 3349 | static Object* Runtime_EvalReceiver(Arguments args) { |
| 3350 | StackFrameLocator locator; |
| 3351 | return locator.FindJavaScriptFrame(1)->receiver(); |
| 3352 | } |
| 3353 | |
| 3354 | |
| 3355 | static Object* Runtime_CompileString(Arguments args) { |
| 3356 | HandleScope scope; |
| 3357 | ASSERT(args.length() == 2); |
| 3358 | bool contextual = args[1]->IsTrue(); |
| 3359 | RUNTIME_ASSERT(contextual || args[1]->IsFalse()); |
| 3360 | |
| 3361 | // Compute the eval context. |
| 3362 | Handle<Context> context; |
| 3363 | if (contextual) { |
| 3364 | // Get eval context. May not be available if we are calling eval |
| 3365 | // through an alias, and the corresponding frame doesn't have a |
| 3366 | // proper eval context set up. |
| 3367 | Object* eval_context = EvalContext(); |
| 3368 | if (eval_context->IsFailure()) return eval_context; |
| 3369 | context = Handle<Context>(Context::cast(eval_context)); |
| 3370 | } else { |
| 3371 | context = Handle<Context>(Top::context()->global_context()); |
| 3372 | } |
| 3373 | |
| 3374 | // Compile eval() source. |
| 3375 | Handle<String> source(String::cast(args[0])); |
| 3376 | Handle<JSFunction> boilerplate = |
| 3377 | Compiler::CompileEval(context->IsGlobalContext(), source); |
| 3378 | if (boilerplate.is_null()) return Failure::Exception(); |
| 3379 | Handle<JSFunction> fun = |
| 3380 | Factory::NewFunctionFromBoilerplate(boilerplate, context); |
| 3381 | return *fun; |
| 3382 | } |
| 3383 | |
| 3384 | |
| 3385 | static Object* Runtime_CompileScript(Arguments args) { |
| 3386 | HandleScope scope; |
| 3387 | ASSERT(args.length() == 4); |
| 3388 | |
| 3389 | CONVERT_ARG_CHECKED(String, source, 0); |
| 3390 | CONVERT_ARG_CHECKED(String, script, 1); |
| 3391 | CONVERT_CHECKED(Smi, line_attrs, args[2]); |
| 3392 | int line = line_attrs->value(); |
| 3393 | CONVERT_CHECKED(Smi, col_attrs, args[3]); |
| 3394 | int col = col_attrs->value(); |
| 3395 | Handle<JSFunction> boilerplate = |
| 3396 | Compiler::Compile(source, script, line, col, NULL, NULL); |
| 3397 | if (boilerplate.is_null()) return Failure::Exception(); |
| 3398 | Handle<JSFunction> fun = |
| 3399 | Factory::NewFunctionFromBoilerplate(boilerplate, |
| 3400 | Handle<Context>(Top::context())); |
| 3401 | return *fun; |
| 3402 | } |
| 3403 | |
| 3404 | |
| 3405 | static Object* Runtime_SetNewFunctionAttributes(Arguments args) { |
| 3406 | // This utility adjusts the property attributes for newly created Function |
| 3407 | // object ("new Function(...)") by changing the map. |
| 3408 | // All it does is changing the prototype property to enumerable |
| 3409 | // as specified in ECMA262, 15.3.5.2. |
| 3410 | HandleScope scope; |
| 3411 | ASSERT(args.length() == 1); |
| 3412 | CONVERT_ARG_CHECKED(JSFunction, func, 0); |
| 3413 | ASSERT(func->map()->instance_type() == |
| 3414 | Top::function_instance_map()->instance_type()); |
| 3415 | ASSERT(func->map()->instance_size() == |
| 3416 | Top::function_instance_map()->instance_size()); |
| 3417 | func->set_map(*Top::function_instance_map()); |
| 3418 | return *func; |
| 3419 | } |
| 3420 | |
| 3421 | |
| 3422 | // This will not allocate (flatten the string), but it may run |
| 3423 | // very slowly for very deeply nested ConsStrings. For debugging use only. |
| 3424 | static Object* Runtime_GlobalPrint(Arguments args) { |
| 3425 | NoHandleAllocation ha; |
| 3426 | ASSERT(args.length() == 1); |
| 3427 | |
| 3428 | CONVERT_CHECKED(String, string, args[0]); |
| 3429 | StringInputBuffer buffer(string); |
| 3430 | while (buffer.has_more()) { |
| 3431 | uint16_t character = buffer.GetNext(); |
| 3432 | PrintF("%c", character); |
| 3433 | } |
| 3434 | return string; |
| 3435 | } |
| 3436 | |
| 3437 | |
| 3438 | static Object* Runtime_RemoveArrayHoles(Arguments args) { |
| 3439 | ASSERT(args.length() == 1); |
| 3440 | // Ignore the case if this is not a JSArray. |
| 3441 | if (!args[0]->IsJSArray()) return args[0]; |
| 3442 | return JSArray::cast(args[0])->RemoveHoles(); |
| 3443 | } |
| 3444 | |
| 3445 | |
| 3446 | // Move contents of argument 0 (an array) to argument 1 (an array) |
| 3447 | static Object* Runtime_MoveArrayContents(Arguments args) { |
| 3448 | ASSERT(args.length() == 2); |
| 3449 | CONVERT_CHECKED(JSArray, from, args[0]); |
| 3450 | CONVERT_CHECKED(JSArray, to, args[1]); |
| 3451 | to->SetContent(FixedArray::cast(from->elements())); |
| 3452 | to->set_length(from->length()); |
| 3453 | from->SetContent(Heap::empty_fixed_array()); |
| 3454 | from->set_length(0); |
| 3455 | return to; |
| 3456 | } |
| 3457 | |
| 3458 | |
| 3459 | // How many elements does this array have? |
| 3460 | static Object* Runtime_EstimateNumberOfElements(Arguments args) { |
| 3461 | ASSERT(args.length() == 1); |
| 3462 | CONVERT_CHECKED(JSArray, array, args[0]); |
| 3463 | HeapObject* elements = array->elements(); |
| 3464 | if (elements->IsDictionary()) { |
| 3465 | return Smi::FromInt(Dictionary::cast(elements)->NumberOfElements()); |
| 3466 | } else { |
| 3467 | return array->length(); |
| 3468 | } |
| 3469 | } |
| 3470 | |
| 3471 | |
| 3472 | // Returns an array that tells you where in the [0, length) interval an array |
| 3473 | // might have elements. Can either return keys or intervals. Keys can have |
| 3474 | // gaps in (undefined). Intervals can also span over some undefined keys. |
| 3475 | static Object* Runtime_GetArrayKeys(Arguments args) { |
| 3476 | ASSERT(args.length() == 2); |
| 3477 | HandleScope scope; |
| 3478 | CONVERT_CHECKED(JSArray, raw_array, args[0]); |
| 3479 | Handle<JSArray> array(raw_array); |
| 3480 | CONVERT_NUMBER_CHECKED(uint32_t, length, Uint32, args[1]); |
| 3481 | HeapObject* elements = array->elements(); |
| 3482 | if (elements->IsDictionary()) { |
| 3483 | // Create an array and get all the keys into it, then remove all the |
| 3484 | // keys that are not integers in the range 0 to length-1. |
| 3485 | Handle<FixedArray> keys = GetKeysInFixedArrayFor(array); |
| 3486 | int keys_length = keys->length(); |
| 3487 | for (int i = 0; i < keys_length; i++) { |
| 3488 | Object* key = keys->get(i); |
| 3489 | uint32_t index; |
| 3490 | if (!Array::IndexFromObject(key, &index) || index >= length) { |
| 3491 | // Zap invalid keys. |
| 3492 | keys->set_undefined(i); |
| 3493 | } |
| 3494 | } |
| 3495 | return *Factory::NewJSArrayWithElements(keys); |
| 3496 | } else { |
| 3497 | Handle<FixedArray> single_interval = Factory::NewFixedArray(2); |
| 3498 | // -1 means start of array. |
| 3499 | single_interval->set(0, Smi::FromInt(-1)); |
| 3500 | Handle<Object> length_object = |
| 3501 | Factory::NewNumber(static_cast<double>(length)); |
| 3502 | single_interval->set(1, *length_object); |
| 3503 | return *Factory::NewJSArrayWithElements(single_interval); |
| 3504 | } |
| 3505 | } |
| 3506 | |
| 3507 | |
| 3508 | // DefineAccessor takes an optional final argument which is the |
| 3509 | // property attributes (eg, DONT_ENUM, DONT_DELETE). IMPORTANT: due |
| 3510 | // to the way accessors are implemented, it is set for both the getter |
| 3511 | // and setter on the first call to DefineAccessor and ignored on |
| 3512 | // subsequent calls. |
| 3513 | static Object* Runtime_DefineAccessor(Arguments args) { |
| 3514 | RUNTIME_ASSERT(args.length() == 4 || args.length() == 5); |
| 3515 | // Compute attributes. |
| 3516 | PropertyAttributes attributes = NONE; |
| 3517 | if (args.length() == 5) { |
| 3518 | CONVERT_CHECKED(Smi, attrs, args[4]); |
| 3519 | int value = attrs->value(); |
| 3520 | // Only attribute bits should be set. |
| 3521 | ASSERT((value & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0); |
| 3522 | attributes = static_cast<PropertyAttributes>(value); |
| 3523 | } |
| 3524 | |
| 3525 | CONVERT_CHECKED(JSObject, obj, args[0]); |
| 3526 | CONVERT_CHECKED(String, name, args[1]); |
| 3527 | CONVERT_CHECKED(Smi, flag, args[2]); |
| 3528 | CONVERT_CHECKED(JSFunction, fun, args[3]); |
| 3529 | return obj->DefineAccessor(name, flag->value() == 0, fun, attributes); |
| 3530 | } |
| 3531 | |
| 3532 | |
| 3533 | static Object* Runtime_LookupAccessor(Arguments args) { |
| 3534 | ASSERT(args.length() == 3); |
| 3535 | CONVERT_CHECKED(JSObject, obj, args[0]); |
| 3536 | CONVERT_CHECKED(String, name, args[1]); |
| 3537 | CONVERT_CHECKED(Smi, flag, args[2]); |
| 3538 | return obj->LookupAccessor(name, flag->value() == 0); |
| 3539 | } |
| 3540 | |
| 3541 | |
| 3542 | // Helper functions for wrapping and unwrapping stack frame ids. |
| 3543 | static Smi* WrapFrameId(StackFrame::Id id) { |
| 3544 | ASSERT(IsAligned(OffsetFrom(id), 4)); |
| 3545 | return Smi::FromInt(id >> 2); |
| 3546 | } |
| 3547 | |
| 3548 | |
| 3549 | static StackFrame::Id UnwrapFrameId(Smi* wrapped) { |
| 3550 | return static_cast<StackFrame::Id>(wrapped->value() << 2); |
| 3551 | } |
| 3552 | |
| 3553 | |
| 3554 | // Adds a JavaScript function as a debug event listener. |
| 3555 | // args[0]: debug event listener function |
| 3556 | // args[1]: object supplied during callback |
| 3557 | static Object* Runtime_AddDebugEventListener(Arguments args) { |
| 3558 | ASSERT(args.length() == 2); |
| 3559 | // Convert the parameters to API objects to call the API function for adding |
| 3560 | // a JavaScript function as debug event listener. |
| 3561 | CONVERT_ARG_CHECKED(JSFunction, raw_fun, 0); |
| 3562 | v8::Handle<v8::Function> fun(ToApi<v8::Function>(raw_fun)); |
| 3563 | v8::Handle<v8::Value> data(ToApi<v8::Value>(args.at<Object>(0))); |
| 3564 | v8::Debug::AddDebugEventListener(fun, data); |
| 3565 | |
| 3566 | return Heap::undefined_value(); |
| 3567 | } |
| 3568 | |
| 3569 | |
| 3570 | // Removes a JavaScript function debug event listener. |
| 3571 | // args[0]: debug event listener function |
| 3572 | static Object* Runtime_RemoveDebugEventListener(Arguments args) { |
| 3573 | ASSERT(args.length() == 1); |
| 3574 | // Convert the parameter to an API object to call the API function for |
| 3575 | // removing a JavaScript function debug event listener. |
| 3576 | CONVERT_ARG_CHECKED(JSFunction, raw_fun, 0); |
| 3577 | v8::Handle<v8::Function> fun(ToApi<v8::Function>(raw_fun)); |
| 3578 | v8::Debug::RemoveDebugEventListener(fun); |
| 3579 | |
| 3580 | return Heap::undefined_value(); |
| 3581 | } |
| 3582 | |
| 3583 | |
| 3584 | static Object* Runtime_Break(Arguments args) { |
| 3585 | ASSERT(args.length() == 1); |
| 3586 | StackGuard::DebugBreak(); |
| 3587 | return Heap::undefined_value(); |
| 3588 | } |
| 3589 | |
| 3590 | |
| 3591 | static Object* DebugLookupResultValue(LookupResult* result) { |
| 3592 | Object* value; |
| 3593 | switch (result->type()) { |
| 3594 | case NORMAL: { |
| 3595 | Dictionary* dict = |
| 3596 | JSObject::cast(result->holder())->property_dictionary(); |
| 3597 | value = dict->ValueAt(result->GetDictionaryEntry()); |
| 3598 | if (value->IsTheHole()) { |
| 3599 | return Heap::undefined_value(); |
| 3600 | } |
| 3601 | return value; |
| 3602 | } |
| 3603 | case FIELD: |
| 3604 | value = |
| 3605 | JSObject::cast( |
| 3606 | result->holder())->properties()->get(result->GetFieldIndex()); |
| 3607 | if (value->IsTheHole()) { |
| 3608 | return Heap::undefined_value(); |
| 3609 | } |
| 3610 | return value; |
| 3611 | case CONSTANT_FUNCTION: |
| 3612 | return result->GetConstantFunction(); |
| 3613 | case CALLBACKS: |
| 3614 | return Heap::undefined_value(); |
| 3615 | case MAP_TRANSITION: |
| 3616 | return Heap::undefined_value(); |
| 3617 | case INTERCEPTOR: |
| 3618 | return Heap::undefined_value(); |
| 3619 | default: |
| 3620 | UNREACHABLE(); |
| 3621 | } |
| 3622 | return Heap::undefined_value(); |
| 3623 | } |
| 3624 | |
| 3625 | |
| 3626 | static Object* Runtime_DebugGetLocalPropertyDetails(Arguments args) { |
| 3627 | HandleScope scope; |
| 3628 | |
| 3629 | ASSERT(args.length() == 2); |
| 3630 | |
| 3631 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3632 | CONVERT_ARG_CHECKED(String, name, 1); |
| 3633 | |
| 3634 | // Check if the name is trivially convertible to an index and get the element |
| 3635 | // if so. |
| 3636 | uint32_t index; |
| 3637 | if (name->AsArrayIndex(&index)) { |
| 3638 | Handle<FixedArray> details = Factory::NewFixedArray(2); |
| 3639 | details->set(0, Runtime::GetElementOrCharAt(obj, index)); |
| 3640 | details->set(1, PropertyDetails(NONE, NORMAL).AsSmi()); |
| 3641 | return *Factory::NewJSArrayWithElements(details); |
| 3642 | } |
| 3643 | |
| 3644 | // Perform standard local lookup on the object. |
| 3645 | LookupResult result; |
| 3646 | obj->LocalLookup(*name, &result); |
| 3647 | if (result.IsProperty()) { |
| 3648 | Handle<Object> value(DebugLookupResultValue(&result)); |
| 3649 | Handle<FixedArray> details = Factory::NewFixedArray(2); |
| 3650 | details->set(0, *value); |
| 3651 | details->set(1, result.GetPropertyDetails().AsSmi()); |
| 3652 | return *Factory::NewJSArrayWithElements(details); |
| 3653 | } |
| 3654 | return Heap::undefined_value(); |
| 3655 | } |
| 3656 | |
| 3657 | |
| 3658 | static Object* Runtime_DebugGetProperty(Arguments args) { |
| 3659 | HandleScope scope; |
| 3660 | |
| 3661 | ASSERT(args.length() == 2); |
| 3662 | |
| 3663 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3664 | CONVERT_ARG_CHECKED(String, name, 1); |
| 3665 | |
| 3666 | LookupResult result; |
| 3667 | obj->Lookup(*name, &result); |
| 3668 | if (result.IsProperty()) { |
| 3669 | return DebugLookupResultValue(&result); |
| 3670 | } |
| 3671 | return Heap::undefined_value(); |
| 3672 | } |
| 3673 | |
| 3674 | |
| 3675 | // Return the names of the local named properties. |
| 3676 | // args[0]: object |
| 3677 | static Object* Runtime_DebugLocalPropertyNames(Arguments args) { |
| 3678 | HandleScope scope; |
| 3679 | ASSERT(args.length() == 1); |
| 3680 | if (!args[0]->IsJSObject()) { |
| 3681 | return Heap::undefined_value(); |
| 3682 | } |
| 3683 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3684 | |
| 3685 | int n = obj->NumberOfLocalProperties(static_cast<PropertyAttributes>(NONE)); |
| 3686 | Handle<FixedArray> names = Factory::NewFixedArray(n); |
| 3687 | obj->GetLocalPropertyNames(*names); |
| 3688 | return *Factory::NewJSArrayWithElements(names); |
| 3689 | } |
| 3690 | |
| 3691 | |
| 3692 | // Return the names of the local indexed properties. |
| 3693 | // args[0]: object |
| 3694 | static Object* Runtime_DebugLocalElementNames(Arguments args) { |
| 3695 | HandleScope scope; |
| 3696 | ASSERT(args.length() == 1); |
| 3697 | if (!args[0]->IsJSObject()) { |
| 3698 | return Heap::undefined_value(); |
| 3699 | } |
| 3700 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3701 | |
| 3702 | int n = obj->NumberOfLocalElements(static_cast<PropertyAttributes>(NONE)); |
| 3703 | Handle<FixedArray> names = Factory::NewFixedArray(n); |
| 3704 | obj->GetLocalElementKeys(*names, static_cast<PropertyAttributes>(NONE)); |
| 3705 | return *Factory::NewJSArrayWithElements(names); |
| 3706 | } |
| 3707 | |
| 3708 | |
| 3709 | // Return the property type calculated from the property details. |
| 3710 | // args[0]: smi with property details. |
| 3711 | static Object* Runtime_DebugPropertyTypeFromDetails(Arguments args) { |
| 3712 | ASSERT(args.length() == 1); |
| 3713 | CONVERT_CHECKED(Smi, details, args[0]); |
| 3714 | PropertyType type = PropertyDetails(details).type(); |
| 3715 | return Smi::FromInt(static_cast<int>(type)); |
| 3716 | } |
| 3717 | |
| 3718 | |
| 3719 | // Return the property attribute calculated from the property details. |
| 3720 | // args[0]: smi with property details. |
| 3721 | static Object* Runtime_DebugPropertyAttributesFromDetails(Arguments args) { |
| 3722 | ASSERT(args.length() == 1); |
| 3723 | CONVERT_CHECKED(Smi, details, args[0]); |
| 3724 | PropertyAttributes attributes = PropertyDetails(details).attributes(); |
| 3725 | return Smi::FromInt(static_cast<int>(attributes)); |
| 3726 | } |
| 3727 | |
| 3728 | |
| 3729 | // Return the property insertion index calculated from the property details. |
| 3730 | // args[0]: smi with property details. |
| 3731 | static Object* Runtime_DebugPropertyIndexFromDetails(Arguments args) { |
| 3732 | ASSERT(args.length() == 1); |
| 3733 | CONVERT_CHECKED(Smi, details, args[0]); |
| 3734 | int index = PropertyDetails(details).index(); |
| 3735 | return Smi::FromInt(index); |
| 3736 | } |
| 3737 | |
| 3738 | |
| 3739 | // Return information on whether an object has a named or indexed interceptor. |
| 3740 | // args[0]: object |
| 3741 | static Object* Runtime_DebugInterceptorInfo(Arguments args) { |
| 3742 | HandleScope scope; |
| 3743 | ASSERT(args.length() == 1); |
| 3744 | if (!args[0]->IsJSObject()) { |
| 3745 | return Smi::FromInt(0); |
| 3746 | } |
| 3747 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3748 | |
| 3749 | int result = 0; |
| 3750 | if (obj->HasNamedInterceptor()) result |= 2; |
| 3751 | if (obj->HasIndexedInterceptor()) result |= 1; |
| 3752 | |
| 3753 | return Smi::FromInt(result); |
| 3754 | } |
| 3755 | |
| 3756 | |
| 3757 | // Return property names from named interceptor. |
| 3758 | // args[0]: object |
| 3759 | static Object* Runtime_DebugNamedInterceptorPropertyNames(Arguments args) { |
| 3760 | HandleScope scope; |
| 3761 | ASSERT(args.length() == 1); |
| 3762 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3763 | RUNTIME_ASSERT(obj->HasNamedInterceptor()); |
| 3764 | |
| 3765 | v8::Handle<v8::Array> result = GetKeysForNamedInterceptor(obj, obj); |
| 3766 | if (!result.IsEmpty()) return *v8::Utils::OpenHandle(*result); |
| 3767 | return Heap::undefined_value(); |
| 3768 | } |
| 3769 | |
| 3770 | |
| 3771 | // Return element names from indexed interceptor. |
| 3772 | // args[0]: object |
| 3773 | static Object* Runtime_DebugIndexedInterceptorElementNames(Arguments args) { |
| 3774 | HandleScope scope; |
| 3775 | ASSERT(args.length() == 1); |
| 3776 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3777 | RUNTIME_ASSERT(obj->HasIndexedInterceptor()); |
| 3778 | |
| 3779 | v8::Handle<v8::Array> result = GetKeysForIndexedInterceptor(obj, obj); |
| 3780 | if (!result.IsEmpty()) return *v8::Utils::OpenHandle(*result); |
| 3781 | return Heap::undefined_value(); |
| 3782 | } |
| 3783 | |
| 3784 | |
| 3785 | // Return property value from named interceptor. |
| 3786 | // args[0]: object |
| 3787 | // args[1]: property name |
| 3788 | static Object* Runtime_DebugNamedInterceptorPropertyValue(Arguments args) { |
| 3789 | HandleScope scope; |
| 3790 | ASSERT(args.length() == 2); |
| 3791 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3792 | RUNTIME_ASSERT(obj->HasNamedInterceptor()); |
| 3793 | CONVERT_ARG_CHECKED(String, name, 1); |
| 3794 | |
| 3795 | PropertyAttributes attributes; |
| 3796 | Object* result = obj->GetPropertyWithInterceptor(*obj, *name, &attributes); |
| 3797 | return result; |
| 3798 | } |
| 3799 | |
| 3800 | |
| 3801 | // Return element value from indexed interceptor. |
| 3802 | // args[0]: object |
| 3803 | // args[1]: index |
| 3804 | static Object* Runtime_DebugIndexedInterceptorElementValue(Arguments args) { |
| 3805 | HandleScope scope; |
| 3806 | ASSERT(args.length() == 2); |
| 3807 | CONVERT_ARG_CHECKED(JSObject, obj, 0); |
| 3808 | RUNTIME_ASSERT(obj->HasIndexedInterceptor()); |
| 3809 | CONVERT_NUMBER_CHECKED(uint32_t, index, Uint32, args[1]); |
| 3810 | |
| 3811 | Object* result = obj->GetElementWithInterceptor(*obj, index); |
| 3812 | return result; |
| 3813 | } |
| 3814 | |
| 3815 | |
| 3816 | static Object* Runtime_CheckExecutionState(Arguments args) { |
| 3817 | ASSERT(args.length() >= 1); |
| 3818 | CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]); |
| 3819 | // Check that the break id is valid and that there is a valid frame |
| 3820 | // where execution is broken. |
| 3821 | if (break_id != Top::break_id() || |
| 3822 | Top::break_frame_id() == StackFrame::NO_ID) { |
| 3823 | return Top::Throw(Heap::illegal_execution_state_symbol()); |
| 3824 | } |
| 3825 | |
| 3826 | return Heap::true_value(); |
| 3827 | } |
| 3828 | |
| 3829 | |
| 3830 | static Object* Runtime_GetFrameCount(Arguments args) { |
| 3831 | HandleScope scope; |
| 3832 | ASSERT(args.length() == 1); |
| 3833 | |
| 3834 | // Check arguments. |
| 3835 | Object* result = Runtime_CheckExecutionState(args); |
| 3836 | if (result->IsFailure()) return result; |
| 3837 | |
| 3838 | // Count all frames which are relevant to debugging stack trace. |
| 3839 | int n = 0; |
| 3840 | StackFrame::Id id = Top::break_frame_id(); |
| 3841 | for (JavaScriptFrameIterator it(id); !it.done(); it.Advance()) n++; |
| 3842 | return Smi::FromInt(n); |
| 3843 | } |
| 3844 | |
| 3845 | |
| 3846 | static const int kFrameDetailsFrameIdIndex = 0; |
| 3847 | static const int kFrameDetailsReceiverIndex = 1; |
| 3848 | static const int kFrameDetailsFunctionIndex = 2; |
| 3849 | static const int kFrameDetailsArgumentCountIndex = 3; |
| 3850 | static const int kFrameDetailsLocalCountIndex = 4; |
| 3851 | static const int kFrameDetailsSourcePositionIndex = 5; |
| 3852 | static const int kFrameDetailsConstructCallIndex = 6; |
| 3853 | static const int kFrameDetailsDebuggerFrameIndex = 7; |
| 3854 | static const int kFrameDetailsFirstDynamicIndex = 8; |
| 3855 | |
| 3856 | // Return an array with frame details |
| 3857 | // args[0]: number: break id |
| 3858 | // args[1]: number: frame index |
| 3859 | // |
| 3860 | // The array returned contains the following information: |
| 3861 | // 0: Frame id |
| 3862 | // 1: Receiver |
| 3863 | // 2: Function |
| 3864 | // 3: Argument count |
| 3865 | // 4: Local count |
| 3866 | // 5: Source position |
| 3867 | // 6: Constructor call |
| 3868 | // 7: Debugger frame |
| 3869 | // Arguments name, value |
| 3870 | // Locals name, value |
| 3871 | static Object* Runtime_GetFrameDetails(Arguments args) { |
| 3872 | HandleScope scope; |
| 3873 | ASSERT(args.length() == 2); |
| 3874 | |
| 3875 | // Check arguments. |
| 3876 | Object* result = Runtime_CheckExecutionState(args); |
| 3877 | if (result->IsFailure()) return result; |
| 3878 | CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]); |
| 3879 | |
| 3880 | // Find the relevant frame with the requested index. |
| 3881 | StackFrame::Id id = Top::break_frame_id(); |
| 3882 | int count = 0; |
| 3883 | JavaScriptFrameIterator it(id); |
| 3884 | for (; !it.done(); it.Advance()) { |
| 3885 | if (count == index) break; |
| 3886 | count++; |
| 3887 | } |
| 3888 | if (it.done()) return Heap::undefined_value(); |
| 3889 | |
| 3890 | // Traverse the saved contexts chain to find the active context for the |
| 3891 | // selected frame. |
| 3892 | SaveContext* save = Top::save_context(); |
| 3893 | while (save != NULL && reinterpret_cast<Address>(save) < it.frame()->sp()) { |
| 3894 | save = save->prev(); |
| 3895 | } |
| 3896 | |
| 3897 | // Get the frame id. |
| 3898 | Handle<Object> frame_id(WrapFrameId(it.frame()->id())); |
| 3899 | |
| 3900 | // Find source position. |
| 3901 | int position = it.frame()->FindCode()->SourcePosition(it.frame()->pc()); |
| 3902 | |
| 3903 | // Check for constructor frame. |
| 3904 | bool constructor = it.frame()->IsConstructor(); |
| 3905 | |
| 3906 | // Get code and read scope info from it for local variable information. |
| 3907 | Handle<Code> code(it.frame()->FindCode()); |
| 3908 | ScopeInfo<> info(*code); |
| 3909 | |
| 3910 | // Get the context. |
| 3911 | Handle<Context> context(Context::cast(it.frame()->context())); |
| 3912 | |
| 3913 | // Get the locals names and values into a temporary array. |
| 3914 | // |
| 3915 | // TODO(1240907): Hide compiler-introduced stack variables |
| 3916 | // (e.g. .result)? For users of the debugger, they will probably be |
| 3917 | // confusing. |
| 3918 | Handle<FixedArray> locals = Factory::NewFixedArray(info.NumberOfLocals() * 2); |
| 3919 | for (int i = 0; i < info.NumberOfLocals(); i++) { |
| 3920 | // Name of the local. |
| 3921 | locals->set(i * 2, *info.LocalName(i)); |
| 3922 | |
| 3923 | // Fetch the value of the local - either from the stack or from a |
| 3924 | // heap-allocated context. |
| 3925 | if (i < info.number_of_stack_slots()) { |
| 3926 | locals->set(i * 2 + 1, it.frame()->GetExpression(i)); |
| 3927 | } else { |
| 3928 | Handle<String> name = info.LocalName(i); |
| 3929 | // Traverse the context chain to the function context as all local |
| 3930 | // variables stored in the context will be on the function context. |
| 3931 | while (context->previous() != NULL) { |
| 3932 | context = Handle<Context>(context->previous()); |
| 3933 | } |
| 3934 | ASSERT(context->is_function_context()); |
| 3935 | locals->set(i * 2 + 1, |
| 3936 | context->get(ScopeInfo<>::ContextSlotIndex(*code, *name, |
| 3937 | NULL))); |
| 3938 | } |
| 3939 | } |
| 3940 | |
| 3941 | // Now advance to the arguments adapter frame (if any). If contains all |
| 3942 | // the provided parameters and |
| 3943 | |
| 3944 | // Now advance to the arguments adapter frame (if any). It contains all |
| 3945 | // the provided parameters whereas the function frame always have the number |
| 3946 | // of arguments matching the functions parameters. The rest of the |
| 3947 | // information (except for what is collected above) is the same. |
| 3948 | it.AdvanceToArgumentsFrame(); |
| 3949 | |
| 3950 | // Find the number of arguments to fill. At least fill the number of |
| 3951 | // parameters for the function and fill more if more parameters are provided. |
| 3952 | int argument_count = info.number_of_parameters(); |
| 3953 | if (argument_count < it.frame()->GetProvidedParametersCount()) { |
| 3954 | argument_count = it.frame()->GetProvidedParametersCount(); |
| 3955 | } |
| 3956 | |
| 3957 | // Calculate the size of the result. |
| 3958 | int details_size = kFrameDetailsFirstDynamicIndex + |
| 3959 | 2 * (argument_count + info.NumberOfLocals()); |
| 3960 | Handle<FixedArray> details = Factory::NewFixedArray(details_size); |
| 3961 | |
| 3962 | // Add the frame id. |
| 3963 | details->set(kFrameDetailsFrameIdIndex, *frame_id); |
| 3964 | |
| 3965 | // Add the function (same as in function frame). |
| 3966 | details->set(kFrameDetailsFunctionIndex, it.frame()->function()); |
| 3967 | |
| 3968 | // Add the arguments count. |
| 3969 | details->set(kFrameDetailsArgumentCountIndex, Smi::FromInt(argument_count)); |
| 3970 | |
| 3971 | // Add the locals count |
| 3972 | details->set(kFrameDetailsLocalCountIndex, |
| 3973 | Smi::FromInt(info.NumberOfLocals())); |
| 3974 | |
| 3975 | // Add the source position. |
| 3976 | if (position != kNoPosition) { |
| 3977 | details->set(kFrameDetailsSourcePositionIndex, Smi::FromInt(position)); |
| 3978 | } else { |
| 3979 | details->set(kFrameDetailsSourcePositionIndex, Heap::undefined_value()); |
| 3980 | } |
| 3981 | |
| 3982 | // Add the constructor information. |
| 3983 | details->set(kFrameDetailsConstructCallIndex, Heap::ToBoolean(constructor)); |
| 3984 | |
| 3985 | // Add information on whether this frame is invoked in the debugger context. |
| 3986 | details->set(kFrameDetailsDebuggerFrameIndex, |
| 3987 | Heap::ToBoolean(*save->context() == *Debug::debug_context())); |
| 3988 | |
| 3989 | // Fill the dynamic part. |
| 3990 | int details_index = kFrameDetailsFirstDynamicIndex; |
| 3991 | |
| 3992 | // Add arguments name and value. |
| 3993 | for (int i = 0; i < argument_count; i++) { |
| 3994 | // Name of the argument. |
| 3995 | if (i < info.number_of_parameters()) { |
| 3996 | details->set(details_index++, *info.parameter_name(i)); |
| 3997 | } else { |
| 3998 | details->set(details_index++, Heap::undefined_value()); |
| 3999 | } |
| 4000 | |
| 4001 | // Parameter value. |
| 4002 | if (i < it.frame()->GetProvidedParametersCount()) { |
| 4003 | details->set(details_index++, it.frame()->GetParameter(i)); |
| 4004 | } else { |
| 4005 | details->set(details_index++, Heap::undefined_value()); |
| 4006 | } |
| 4007 | } |
| 4008 | |
| 4009 | // Add locals name and value from the temporary copy from the function frame. |
| 4010 | for (int i = 0; i < info.NumberOfLocals() * 2; i++) { |
| 4011 | details->set(details_index++, locals->get(i)); |
| 4012 | } |
| 4013 | |
| 4014 | // Add the receiver (same as in function frame). |
| 4015 | // THIS MUST BE DONE LAST SINCE WE MIGHT ADVANCE |
| 4016 | // THE FRAME ITERATOR TO WRAP THE RECEIVER. |
| 4017 | Handle<Object> receiver(it.frame()->receiver()); |
| 4018 | if (!receiver->IsJSObject()) { |
| 4019 | // If the receiver is NOT a JSObject we have hit an optimization |
| 4020 | // where a value object is not converted into a wrapped JS objects. |
| 4021 | // To hide this optimization from the debugger, we wrap the receiver |
| 4022 | // by creating correct wrapper object based on the calling frame's |
| 4023 | // global context. |
| 4024 | it.Advance(); |
| 4025 | Handle<Context> calling_frames_global_context( |
| 4026 | Context::cast(Context::cast(it.frame()->context())->global_context())); |
| 4027 | receiver = Factory::ToObject(receiver, calling_frames_global_context); |
| 4028 | } |
| 4029 | details->set(kFrameDetailsReceiverIndex, *receiver); |
| 4030 | |
| 4031 | ASSERT_EQ(details_size, details_index); |
| 4032 | return *Factory::NewJSArrayWithElements(details); |
| 4033 | } |
| 4034 | |
| 4035 | |
| 4036 | static Object* Runtime_GetCFrames(Arguments args) { |
| 4037 | HandleScope scope; |
| 4038 | ASSERT(args.length() == 1); |
| 4039 | Object* result = Runtime_CheckExecutionState(args); |
| 4040 | if (result->IsFailure()) return result; |
| 4041 | |
| 4042 | static const int kMaxCFramesSize = 200; |
| 4043 | OS::StackFrame frames[kMaxCFramesSize]; |
| 4044 | int frames_count = OS::StackWalk(frames, kMaxCFramesSize); |
| 4045 | if (frames_count == OS::kStackWalkError) { |
| 4046 | return Heap::undefined_value(); |
| 4047 | } |
| 4048 | |
| 4049 | Handle<String> address_str = Factory::LookupAsciiSymbol("address"); |
| 4050 | Handle<String> text_str = Factory::LookupAsciiSymbol("text"); |
| 4051 | Handle<FixedArray> frames_array = Factory::NewFixedArray(frames_count); |
| 4052 | for (int i = 0; i < frames_count; i++) { |
| 4053 | Handle<JSObject> frame_value = Factory::NewJSObject(Top::object_function()); |
| 4054 | frame_value->SetProperty( |
| 4055 | *address_str, |
| 4056 | *Factory::NewNumberFromInt(reinterpret_cast<int>(frames[i].address)), |
| 4057 | NONE); |
| 4058 | |
| 4059 | // Get the stack walk text for this frame. |
| 4060 | Handle<String> frame_text; |
| 4061 | if (strlen(frames[i].text) > 0) { |
| 4062 | Vector<const char> str(frames[i].text, strlen(frames[i].text)); |
| 4063 | frame_text = Factory::NewStringFromAscii(str); |
| 4064 | } |
| 4065 | |
| 4066 | if (!frame_text.is_null()) { |
| 4067 | frame_value->SetProperty(*text_str, *frame_text, NONE); |
| 4068 | } |
| 4069 | |
| 4070 | frames_array->set(i, *frame_value); |
| 4071 | } |
| 4072 | return *Factory::NewJSArrayWithElements(frames_array); |
| 4073 | } |
| 4074 | |
| 4075 | |
| 4076 | static Object* Runtime_GetBreakLocations(Arguments args) { |
| 4077 | HandleScope scope; |
| 4078 | ASSERT(args.length() == 1); |
| 4079 | |
| 4080 | CONVERT_ARG_CHECKED(JSFunction, raw_fun, 0); |
| 4081 | Handle<SharedFunctionInfo> shared(raw_fun->shared()); |
| 4082 | // Find the number of break points |
| 4083 | Handle<Object> break_locations = Debug::GetSourceBreakLocations(shared); |
| 4084 | if (break_locations->IsUndefined()) return Heap::undefined_value(); |
| 4085 | // Return array as JS array |
| 4086 | return *Factory::NewJSArrayWithElements( |
| 4087 | Handle<FixedArray>::cast(break_locations)); |
| 4088 | } |
| 4089 | |
| 4090 | |
| 4091 | // Set a break point in a function |
| 4092 | // args[0]: function |
| 4093 | // args[1]: number: break source position (within the function source) |
| 4094 | // args[2]: number: break point object |
| 4095 | static Object* Runtime_SetFunctionBreakPoint(Arguments args) { |
| 4096 | HandleScope scope; |
| 4097 | ASSERT(args.length() == 3); |
| 4098 | CONVERT_ARG_CHECKED(JSFunction, raw_fun, 0); |
| 4099 | Handle<SharedFunctionInfo> shared(raw_fun->shared()); |
| 4100 | CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]); |
| 4101 | RUNTIME_ASSERT(source_position >= 0); |
| 4102 | Handle<Object> break_point_object_arg = args.at<Object>(2); |
| 4103 | |
| 4104 | // Set break point. |
| 4105 | Debug::SetBreakPoint(shared, source_position, break_point_object_arg); |
| 4106 | |
| 4107 | return Heap::undefined_value(); |
| 4108 | } |
| 4109 | |
| 4110 | |
| 4111 | static Object* FindSharedFunctionInfoInScript(Handle<Script> script, |
| 4112 | int position) { |
| 4113 | // Iterate the heap looking for SharedFunctionInfo generated from the |
| 4114 | // script. The inner most SharedFunctionInfo containing the source position |
| 4115 | // for the requested break point is found. |
| 4116 | // NOTE: This might reqire several heap iterations. If the SharedFunctionInfo |
| 4117 | // which is found is not compiled it is compiled and the heap is iterated |
| 4118 | // again as the compilation might create inner functions from the newly |
| 4119 | // compiled function and the actual requested break point might be in one of |
| 4120 | // these functions. |
| 4121 | bool done = false; |
| 4122 | // The current candidate for the source position: |
| 4123 | int target_start_position = kNoPosition; |
| 4124 | Handle<SharedFunctionInfo> target; |
| 4125 | // The current candidate for the last function in script: |
| 4126 | Handle<SharedFunctionInfo> last; |
| 4127 | while (!done) { |
| 4128 | HeapIterator iterator; |
| 4129 | while (iterator.has_next()) { |
| 4130 | HeapObject* obj = iterator.next(); |
| 4131 | ASSERT(obj != NULL); |
| 4132 | if (obj->IsSharedFunctionInfo()) { |
| 4133 | Handle<SharedFunctionInfo> shared(SharedFunctionInfo::cast(obj)); |
| 4134 | if (shared->script() == *script) { |
| 4135 | // If the SharedFunctionInfo found has the requested script data and |
| 4136 | // contains the source position it is a candidate. |
| 4137 | int start_position = shared->function_token_position(); |
| 4138 | if (start_position == kNoPosition) { |
| 4139 | start_position = shared->start_position(); |
| 4140 | } |
| 4141 | if (start_position <= position && |
| 4142 | position <= shared->end_position()) { |
| 4143 | // If there is no candidate or this function is within the currrent |
| 4144 | // candidate this is the new candidate. |
| 4145 | if (target.is_null()) { |
| 4146 | target_start_position = start_position; |
| 4147 | target = shared; |
| 4148 | } else { |
| 4149 | if (target_start_position < start_position && |
| 4150 | shared->end_position() < target->end_position()) { |
| 4151 | target_start_position = start_position; |
| 4152 | target = shared; |
| 4153 | } |
| 4154 | } |
| 4155 | } |
| 4156 | |
| 4157 | // Keep track of the last function in the script. |
| 4158 | if (last.is_null() || |
| 4159 | shared->end_position() > last->start_position()) { |
| 4160 | last = shared; |
| 4161 | } |
| 4162 | } |
| 4163 | } |
| 4164 | } |
| 4165 | |
| 4166 | // Make sure some candidate is selected. |
| 4167 | if (target.is_null()) { |
| 4168 | if (!last.is_null()) { |
| 4169 | // Position after the last function - use last. |
| 4170 | target = last; |
| 4171 | } else { |
| 4172 | // Unable to find function - possibly script without any function. |
| 4173 | return Heap::undefined_value(); |
| 4174 | } |
| 4175 | } |
| 4176 | |
| 4177 | // If the candidate found is compiled we are done. NOTE: when lazy |
| 4178 | // compilation of inner functions is introduced some additional checking |
| 4179 | // needs to be done here to compile inner functions. |
| 4180 | done = target->is_compiled(); |
| 4181 | if (!done) { |
| 4182 | // If the candidate is not compiled compile it to reveal any inner |
| 4183 | // functions which might contain the requested source position. |
| 4184 | CompileLazyShared(target, KEEP_EXCEPTION); |
| 4185 | } |
| 4186 | } |
| 4187 | |
| 4188 | return *target; |
| 4189 | } |
| 4190 | |
| 4191 | |
| 4192 | // Change the state of a break point in a script. NOTE: Regarding performance |
| 4193 | // see the NOTE for GetScriptFromScriptData. |
| 4194 | // args[0]: script to set break point in |
| 4195 | // args[1]: number: break source position (within the script source) |
| 4196 | // args[2]: number: break point object |
| 4197 | static Object* Runtime_SetScriptBreakPoint(Arguments args) { |
| 4198 | HandleScope scope; |
| 4199 | ASSERT(args.length() == 3); |
| 4200 | CONVERT_ARG_CHECKED(JSValue, wrapper, 0); |
| 4201 | CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]); |
| 4202 | RUNTIME_ASSERT(source_position >= 0); |
| 4203 | Handle<Object> break_point_object_arg = args.at<Object>(2); |
| 4204 | |
| 4205 | // Get the script from the script wrapper. |
| 4206 | RUNTIME_ASSERT(wrapper->value()->IsScript()); |
| 4207 | Handle<Script> script(Script::cast(wrapper->value())); |
| 4208 | |
| 4209 | Object* result = FindSharedFunctionInfoInScript(script, source_position); |
| 4210 | if (!result->IsUndefined()) { |
| 4211 | Handle<SharedFunctionInfo> shared(SharedFunctionInfo::cast(result)); |
| 4212 | // Find position within function. The script position might be before the |
| 4213 | // source position of the first function. |
| 4214 | int position; |
| 4215 | if (shared->start_position() > source_position) { |
| 4216 | position = 0; |
| 4217 | } else { |
| 4218 | position = source_position - shared->start_position(); |
| 4219 | } |
| 4220 | Debug::SetBreakPoint(shared, position, break_point_object_arg); |
| 4221 | } |
| 4222 | return Heap::undefined_value(); |
| 4223 | } |
| 4224 | |
| 4225 | |
| 4226 | // Clear a break point |
| 4227 | // args[0]: number: break point object |
| 4228 | static Object* Runtime_ClearBreakPoint(Arguments args) { |
| 4229 | HandleScope scope; |
| 4230 | ASSERT(args.length() == 1); |
| 4231 | Handle<Object> break_point_object_arg = args.at<Object>(0); |
| 4232 | |
| 4233 | // Clear break point. |
| 4234 | Debug::ClearBreakPoint(break_point_object_arg); |
| 4235 | |
| 4236 | return Heap::undefined_value(); |
| 4237 | } |
| 4238 | |
| 4239 | |
| 4240 | // Change the state of break on exceptions |
| 4241 | // args[0]: boolean indicating uncaught exceptions |
| 4242 | // args[1]: boolean indicating on/off |
| 4243 | static Object* Runtime_ChangeBreakOnException(Arguments args) { |
| 4244 | HandleScope scope; |
| 4245 | ASSERT(args.length() == 2); |
| 4246 | ASSERT(args[0]->IsNumber()); |
| 4247 | ASSERT(args[1]->IsBoolean()); |
| 4248 | |
| 4249 | // Update break point state |
| 4250 | ExceptionBreakType type = |
| 4251 | static_cast<ExceptionBreakType>(NumberToUint32(args[0])); |
| 4252 | bool enable = args[1]->ToBoolean()->IsTrue(); |
| 4253 | Debug::ChangeBreakOnException(type, enable); |
| 4254 | return Heap::undefined_value(); |
| 4255 | } |
| 4256 | |
| 4257 | |
| 4258 | // Prepare for stepping |
| 4259 | // args[0]: break id for checking execution state |
| 4260 | // args[1]: step action from the enumeration StepAction |
| 4261 | // args[2]: number of times to perform the step |
| 4262 | static Object* Runtime_PrepareStep(Arguments args) { |
| 4263 | HandleScope scope; |
| 4264 | ASSERT(args.length() == 3); |
| 4265 | // Check arguments. |
| 4266 | Object* check_result = Runtime_CheckExecutionState(args); |
| 4267 | if (check_result->IsFailure()) return check_result; |
| 4268 | if (!args[1]->IsNumber() || !args[2]->IsNumber()) { |
| 4269 | return Top::Throw(Heap::illegal_argument_symbol()); |
| 4270 | } |
| 4271 | |
| 4272 | // Get the step action and check validity. |
| 4273 | StepAction step_action = static_cast<StepAction>(NumberToInt32(args[1])); |
| 4274 | if (step_action != StepIn && |
| 4275 | step_action != StepNext && |
| 4276 | step_action != StepOut && |
| 4277 | step_action != StepInMin && |
| 4278 | step_action != StepMin) { |
| 4279 | return Top::Throw(Heap::illegal_argument_symbol()); |
| 4280 | } |
| 4281 | |
| 4282 | // Get the number of steps. |
| 4283 | int step_count = NumberToInt32(args[2]); |
| 4284 | if (step_count < 1) { |
| 4285 | return Top::Throw(Heap::illegal_argument_symbol()); |
| 4286 | } |
| 4287 | |
| 4288 | // Prepare step. |
| 4289 | Debug::PrepareStep(static_cast<StepAction>(step_action), step_count); |
| 4290 | return Heap::undefined_value(); |
| 4291 | } |
| 4292 | |
| 4293 | |
| 4294 | // Clear all stepping set by PrepareStep. |
| 4295 | static Object* Runtime_ClearStepping(Arguments args) { |
| 4296 | HandleScope scope; |
| 4297 | ASSERT(args.length() == 1); |
| 4298 | Debug::ClearStepping(); |
| 4299 | return Heap::undefined_value(); |
| 4300 | } |
| 4301 | |
| 4302 | |
| 4303 | // Creates a copy of the with context chain. The copy of the context chain is |
| 4304 | // is linked to the function context supplied. |
| 4305 | static Handle<Context> CopyWithContextChain(Handle<Context> context_chain, |
| 4306 | Handle<Context> function_context) { |
| 4307 | // At the bottom of the chain. Return the function context to link to. |
| 4308 | if (context_chain->is_function_context()) { |
| 4309 | return function_context; |
| 4310 | } |
| 4311 | |
| 4312 | // Recursively copy the with contexts. |
| 4313 | Handle<Context> previous(context_chain->previous()); |
| 4314 | Handle<JSObject> extension(JSObject::cast(context_chain->extension())); |
| 4315 | return Factory::NewWithContext( |
| 4316 | CopyWithContextChain(function_context, previous), extension); |
| 4317 | } |
| 4318 | |
| 4319 | |
| 4320 | // Helper function to find or create the arguments object for |
| 4321 | // Runtime_DebugEvaluate. |
| 4322 | static Handle<Object> GetArgumentsObject(JavaScriptFrame* frame, |
| 4323 | Handle<JSFunction> function, |
| 4324 | Handle<Code> code, |
| 4325 | const ScopeInfo<>* sinfo, |
| 4326 | Handle<Context> function_context) { |
| 4327 | // Try to find the value of 'arguments' to pass as parameter. If it is not |
| 4328 | // found (that is the debugged function does not reference 'arguments' and |
| 4329 | // does not support eval) then create an 'arguments' object. |
| 4330 | int index; |
| 4331 | if (sinfo->number_of_stack_slots() > 0) { |
| 4332 | index = ScopeInfo<>::StackSlotIndex(*code, Heap::arguments_symbol()); |
| 4333 | if (index != -1) { |
| 4334 | return Handle<Object>(frame->GetExpression(index)); |
| 4335 | } |
| 4336 | } |
| 4337 | |
| 4338 | if (sinfo->number_of_context_slots() > Context::MIN_CONTEXT_SLOTS) { |
| 4339 | index = ScopeInfo<>::ContextSlotIndex(*code, Heap::arguments_symbol(), |
| 4340 | NULL); |
| 4341 | if (index != -1) { |
| 4342 | return Handle<Object>(function_context->get(index)); |
| 4343 | } |
| 4344 | } |
| 4345 | |
| 4346 | const int length = frame->GetProvidedParametersCount(); |
| 4347 | Handle<Object> arguments = Factory::NewArgumentsObject(function, length); |
| 4348 | FixedArray* array = FixedArray::cast(JSObject::cast(*arguments)->elements()); |
| 4349 | ASSERT(array->length() == length); |
| 4350 | for (int i = 0; i < length; i++) { |
| 4351 | array->set(i, frame->GetParameter(i)); |
| 4352 | } |
| 4353 | return arguments; |
| 4354 | } |
| 4355 | |
| 4356 | |
| 4357 | // Evaluate a piece of JavaScript in the context of a stack frame for |
| 4358 | // debugging. This is acomplished by creating a new context which in its |
| 4359 | // extension part has all the parameters and locals of the function on the |
| 4360 | // stack frame. A function which calls eval with the code to evaluate is then |
| 4361 | // compiled in this context and called in this context. As this context |
| 4362 | // replaces the context of the function on the stack frame a new (empty) |
| 4363 | // function is created as well to be used as the closure for the context. |
| 4364 | // This function and the context acts as replacements for the function on the |
| 4365 | // stack frame presenting the same view of the values of parameters and |
| 4366 | // local variables as if the piece of JavaScript was evaluated at the point |
| 4367 | // where the function on the stack frame is currently stopped. |
| 4368 | static Object* Runtime_DebugEvaluate(Arguments args) { |
| 4369 | HandleScope scope; |
| 4370 | |
| 4371 | // Check the execution state and decode arguments frame and source to be |
| 4372 | // evaluated. |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 4373 | ASSERT(args.length() == 4); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4374 | Object* check_result = Runtime_CheckExecutionState(args); |
| 4375 | if (check_result->IsFailure()) return check_result; |
| 4376 | CONVERT_CHECKED(Smi, wrapped_id, args[1]); |
| 4377 | CONVERT_ARG_CHECKED(String, source, 2); |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 4378 | CONVERT_BOOLEAN_CHECKED(disable_break, args[3]); |
| 4379 | |
| 4380 | // Handle the processing of break. |
| 4381 | DisableBreak disable_break_save(disable_break); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4382 | |
| 4383 | // Get the frame where the debugging is performed. |
| 4384 | StackFrame::Id id = UnwrapFrameId(wrapped_id); |
| 4385 | JavaScriptFrameIterator it(id); |
| 4386 | JavaScriptFrame* frame = it.frame(); |
| 4387 | Handle<JSFunction> function(JSFunction::cast(frame->function())); |
| 4388 | Handle<Code> code(function->code()); |
| 4389 | ScopeInfo<> sinfo(*code); |
| 4390 | |
| 4391 | // Traverse the saved contexts chain to find the active context for the |
| 4392 | // selected frame. |
| 4393 | SaveContext* save = Top::save_context(); |
| 4394 | while (save != NULL && reinterpret_cast<Address>(save) < frame->sp()) { |
| 4395 | save = save->prev(); |
| 4396 | } |
| 4397 | ASSERT(save != NULL); |
| 4398 | SaveContext savex; |
| 4399 | Top::set_context(*(save->context())); |
| 4400 | Top::set_security_context(*(save->security_context())); |
| 4401 | |
| 4402 | // Create the (empty) function replacing the function on the stack frame for |
| 4403 | // the purpose of evaluating in the context created below. It is important |
| 4404 | // that this function does not describe any parameters and local variables |
| 4405 | // in the context. If it does then this will cause problems with the lookup |
| 4406 | // in Context::Lookup, where context slots for parameters and local variables |
| 4407 | // are looked at before the extension object. |
| 4408 | Handle<JSFunction> go_between = |
| 4409 | Factory::NewFunction(Factory::empty_string(), Factory::undefined_value()); |
| 4410 | go_between->set_context(function->context()); |
| 4411 | #ifdef DEBUG |
| 4412 | ScopeInfo<> go_between_sinfo(go_between->shared()->code()); |
| 4413 | ASSERT(go_between_sinfo.number_of_parameters() == 0); |
| 4414 | ASSERT(go_between_sinfo.number_of_context_slots() == 0); |
| 4415 | #endif |
| 4416 | |
| 4417 | // Allocate and initialize a context extension object with all the |
| 4418 | // arguments, stack locals heap locals and extension properties of the |
| 4419 | // debugged function. |
| 4420 | Handle<JSObject> context_ext = Factory::NewJSObject(Top::object_function()); |
| 4421 | // First fill all parameters to the context extension. |
| 4422 | for (int i = 0; i < sinfo.number_of_parameters(); ++i) { |
| 4423 | SetProperty(context_ext, |
| 4424 | sinfo.parameter_name(i), |
| 4425 | Handle<Object>(frame->GetParameter(i)), NONE); |
| 4426 | } |
| 4427 | // Second fill all stack locals to the context extension. |
| 4428 | for (int i = 0; i < sinfo.number_of_stack_slots(); i++) { |
| 4429 | SetProperty(context_ext, |
| 4430 | sinfo.stack_slot_name(i), |
| 4431 | Handle<Object>(frame->GetExpression(i)), NONE); |
| 4432 | } |
| 4433 | // Third fill all context locals to the context extension. |
| 4434 | Handle<Context> frame_context(Context::cast(frame->context())); |
| 4435 | Handle<Context> function_context(frame_context->fcontext()); |
| 4436 | for (int i = Context::MIN_CONTEXT_SLOTS; |
| 4437 | i < sinfo.number_of_context_slots(); |
| 4438 | ++i) { |
| 4439 | int context_index = |
| 4440 | ScopeInfo<>::ContextSlotIndex(*code, *sinfo.context_slot_name(i), NULL); |
| 4441 | SetProperty(context_ext, |
| 4442 | sinfo.context_slot_name(i), |
| 4443 | Handle<Object>(function_context->get(context_index)), NONE); |
| 4444 | } |
| 4445 | // Finally copy any properties from the function context extension. This will |
| 4446 | // be variables introduced by eval. |
| 4447 | if (function_context->extension() != NULL && |
| 4448 | !function_context->IsGlobalContext()) { |
| 4449 | Handle<JSObject> ext(JSObject::cast(function_context->extension())); |
| 4450 | Handle<FixedArray> keys = GetKeysInFixedArrayFor(ext); |
| 4451 | for (int i = 0; i < keys->length(); i++) { |
| 4452 | // Names of variables introduced by eval are strings. |
| 4453 | ASSERT(keys->get(i)->IsString()); |
| 4454 | Handle<String> key(String::cast(keys->get(i))); |
| 4455 | SetProperty(context_ext, key, GetProperty(ext, key), NONE); |
| 4456 | } |
| 4457 | } |
| 4458 | |
| 4459 | // Allocate a new context for the debug evaluation and set the extension |
| 4460 | // object build. |
| 4461 | Handle<Context> context = |
| 4462 | Factory::NewFunctionContext(Context::MIN_CONTEXT_SLOTS, go_between); |
| 4463 | context->set_extension(*context_ext); |
| 4464 | // Copy any with contexts present and chain them in front of this context. |
| 4465 | context = CopyWithContextChain(frame_context, context); |
| 4466 | |
| 4467 | // Wrap the evaluation statement in a new function compiled in the newly |
| 4468 | // created context. The function has one parameter which has to be called |
| 4469 | // 'arguments'. This it to have access to what would have been 'arguments' in |
| 4470 | // the function beeing debugged. |
| 4471 | // function(arguments,__source__) {return eval(__source__);} |
| 4472 | static const char* source_str = |
| 4473 | "function(arguments,__source__){return eval(__source__);}"; |
| 4474 | static const int source_str_length = strlen(source_str); |
| 4475 | Handle<String> function_source = |
| 4476 | Factory::NewStringFromAscii(Vector<const char>(source_str, |
| 4477 | source_str_length)); |
| 4478 | Handle<JSFunction> boilerplate = |
| 4479 | Compiler::CompileEval(context->IsGlobalContext(), function_source); |
| 4480 | if (boilerplate.is_null()) return Failure::Exception(); |
| 4481 | Handle<JSFunction> compiled_function = |
| 4482 | Factory::NewFunctionFromBoilerplate(boilerplate, context); |
| 4483 | |
| 4484 | // Invoke the result of the compilation to get the evaluation function. |
| 4485 | bool has_pending_exception; |
| 4486 | Handle<Object> receiver(frame->receiver()); |
| 4487 | Handle<Object> evaluation_function = |
| 4488 | Execution::Call(compiled_function, receiver, 0, NULL, |
| 4489 | &has_pending_exception); |
| 4490 | |
| 4491 | Handle<Object> arguments = GetArgumentsObject(frame, function, code, &sinfo, |
| 4492 | function_context); |
| 4493 | |
| 4494 | // Invoke the evaluation function and return the result. |
| 4495 | const int argc = 2; |
| 4496 | Object** argv[argc] = { arguments.location(), |
| 4497 | Handle<Object>::cast(source).location() }; |
| 4498 | Handle<Object> result = |
| 4499 | Execution::Call(Handle<JSFunction>::cast(evaluation_function), receiver, |
| 4500 | argc, argv, &has_pending_exception); |
| 4501 | return *result; |
| 4502 | } |
| 4503 | |
| 4504 | |
| 4505 | static Object* Runtime_DebugEvaluateGlobal(Arguments args) { |
| 4506 | HandleScope scope; |
| 4507 | |
| 4508 | // Check the execution state and decode arguments frame and source to be |
| 4509 | // evaluated. |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 4510 | ASSERT(args.length() == 3); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4511 | Object* check_result = Runtime_CheckExecutionState(args); |
| 4512 | if (check_result->IsFailure()) return check_result; |
| 4513 | CONVERT_ARG_CHECKED(String, source, 1); |
kasper.lund | bd3ec4e | 2008-07-09 11:06:54 +0000 | [diff] [blame^] | 4514 | CONVERT_BOOLEAN_CHECKED(disable_break, args[2]); |
| 4515 | |
| 4516 | // Handle the processing of break. |
| 4517 | DisableBreak disable_break_save(disable_break); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4518 | |
| 4519 | // Enter the top context from before the debugger was invoked. |
| 4520 | SaveContext save; |
| 4521 | SaveContext* top = &save; |
| 4522 | while (top != NULL && *top->context() == *Debug::debug_context()) { |
| 4523 | top = top->prev(); |
| 4524 | } |
| 4525 | if (top != NULL) { |
| 4526 | Top::set_context(*top->context()); |
| 4527 | Top::set_security_context(*top->security_context()); |
| 4528 | } |
| 4529 | |
| 4530 | // Get the global context now set to the top context from before the |
| 4531 | // debugger was invoked. |
| 4532 | Handle<Context> context = Top::global_context(); |
| 4533 | |
| 4534 | // Compile the source to be evaluated. |
| 4535 | Handle<JSFunction> boilerplate(Compiler::CompileEval(true, source)); |
| 4536 | if (boilerplate.is_null()) return Failure::Exception(); |
| 4537 | Handle<JSFunction> compiled_function = |
| 4538 | Handle<JSFunction>(Factory::NewFunctionFromBoilerplate(boilerplate, |
| 4539 | context)); |
| 4540 | |
| 4541 | // Invoke the result of the compilation to get the evaluation function. |
| 4542 | bool has_pending_exception; |
| 4543 | Handle<Object> receiver = Top::global(); |
| 4544 | Handle<Object> result = |
| 4545 | Execution::Call(compiled_function, receiver, 0, NULL, |
| 4546 | &has_pending_exception); |
| 4547 | return *result; |
| 4548 | } |
| 4549 | |
| 4550 | |
| 4551 | // Helper function used by Runtime_DebugGetLoadedScripts below. |
| 4552 | static int DebugGetLoadedScripts(FixedArray* instances, int instances_size) { |
| 4553 | NoHandleAllocation ha; |
| 4554 | AssertNoAllocation no_alloc; |
| 4555 | |
| 4556 | // Get hold of the current empty script. |
| 4557 | Context* context = Top::context()->global_context(); |
| 4558 | Script* empty = context->empty_script(); |
| 4559 | |
| 4560 | // Scan heap for Script objects. |
| 4561 | int count = 0; |
| 4562 | HeapIterator iterator; |
| 4563 | while (iterator.has_next()) { |
| 4564 | HeapObject* obj = iterator.next(); |
| 4565 | ASSERT(obj != NULL); |
| 4566 | if (obj->IsScript() && obj != empty) { |
| 4567 | if (instances != NULL && count < instances_size) { |
| 4568 | instances->set(count, obj); |
| 4569 | } |
| 4570 | count++; |
| 4571 | } |
| 4572 | } |
| 4573 | |
| 4574 | return count; |
| 4575 | } |
| 4576 | |
| 4577 | |
| 4578 | static Object* Runtime_DebugGetLoadedScripts(Arguments args) { |
| 4579 | HandleScope scope; |
| 4580 | ASSERT(args.length() == 1); |
| 4581 | |
| 4582 | // Perform two GCs to get rid of all unreferenced scripts. The first GC gets |
| 4583 | // rid of all the cached script wrappes and the second gets rid of the |
| 4584 | // scripts which is no longer referenced. |
| 4585 | Heap::CollectGarbage(0, OLD_SPACE); |
| 4586 | Heap::CollectGarbage(0, OLD_SPACE); |
| 4587 | |
| 4588 | // Get the number of scripts. |
| 4589 | int count; |
| 4590 | count = DebugGetLoadedScripts(NULL, 0); |
| 4591 | |
| 4592 | // Allocate an array to hold the result. |
| 4593 | Handle<FixedArray> instances = Factory::NewFixedArray(count); |
| 4594 | |
| 4595 | // Fill the script objects. |
| 4596 | count = DebugGetLoadedScripts(*instances, count); |
| 4597 | |
| 4598 | // Convert the script objects to proper JS objects. |
| 4599 | for (int i = 0; i < count; i++) { |
| 4600 | Handle<Script> script(Script::cast(instances->get(i))); |
| 4601 | instances->set(i, *GetScriptWrapper(script)); |
| 4602 | } |
| 4603 | |
| 4604 | // Return result as a JS array. |
| 4605 | Handle<JSObject> result = Factory::NewJSObject(Top::array_function()); |
| 4606 | Handle<JSArray>::cast(result)->SetContent(*instances); |
| 4607 | return *result; |
| 4608 | } |
| 4609 | |
| 4610 | |
| 4611 | // Helper function used by Runtime_DebugReferencedBy below. |
| 4612 | static int DebugReferencedBy(JSObject* target, |
| 4613 | Object* instance_filter, int max_references, |
| 4614 | FixedArray* instances, int instances_size, |
| 4615 | JSFunction* context_extension_function, |
| 4616 | JSFunction* arguments_function) { |
| 4617 | NoHandleAllocation ha; |
| 4618 | AssertNoAllocation no_alloc; |
| 4619 | |
| 4620 | // Iterate the heap. |
| 4621 | int count = 0; |
| 4622 | JSObject* last = NULL; |
| 4623 | HeapIterator iterator; |
| 4624 | while (iterator.has_next() && |
| 4625 | (max_references == 0 || count < max_references)) { |
| 4626 | // Only look at all JSObjects. |
| 4627 | HeapObject* heap_obj = iterator.next(); |
| 4628 | if (heap_obj->IsJSObject()) { |
| 4629 | // Skip context extension objects and argument arrays as these are |
| 4630 | // checked in the context of functions using them. |
| 4631 | JSObject* obj = JSObject::cast(heap_obj); |
| 4632 | if (obj->map()->constructor() == context_extension_function || |
| 4633 | obj->map()->constructor() == arguments_function) { |
| 4634 | continue; |
| 4635 | } |
| 4636 | |
| 4637 | // Check if the JS object has a reference to the object looked for. |
| 4638 | if (obj->ReferencesObject(target)) { |
| 4639 | // Check instance filter if supplied. This is normally used to avoid |
| 4640 | // references from mirror objects (see Runtime_IsInPrototypeChain). |
| 4641 | if (!instance_filter->IsUndefined()) { |
| 4642 | Object* V = obj; |
| 4643 | while (true) { |
| 4644 | Object* prototype = V->GetPrototype(); |
| 4645 | if (prototype->IsNull()) { |
| 4646 | break; |
| 4647 | } |
| 4648 | if (instance_filter == prototype) { |
| 4649 | obj = NULL; // Don't add this object. |
| 4650 | break; |
| 4651 | } |
| 4652 | V = prototype; |
| 4653 | } |
| 4654 | } |
| 4655 | |
| 4656 | if (obj != NULL) { |
| 4657 | // Valid reference found add to instance array if supplied an update |
| 4658 | // count. |
| 4659 | if (instances != NULL && count < instances_size) { |
| 4660 | instances->set(count, obj); |
| 4661 | } |
| 4662 | last = obj; |
| 4663 | count++; |
| 4664 | } |
| 4665 | } |
| 4666 | } |
| 4667 | } |
| 4668 | |
| 4669 | // Check for circular reference only. This can happen when the object is only |
| 4670 | // referenced from mirrors and has a circular reference in which case the |
| 4671 | // object is not really alive and would have been garbage collected if not |
| 4672 | // referenced from the mirror. |
| 4673 | if (count == 1 && last == target) { |
| 4674 | count = 0; |
| 4675 | } |
| 4676 | |
| 4677 | // Return the number of referencing objects found. |
| 4678 | return count; |
| 4679 | } |
| 4680 | |
| 4681 | |
| 4682 | // Scan the heap for objects with direct references to an object |
| 4683 | // args[0]: the object to find references to |
| 4684 | // args[1]: constructor function for instances to exclude (Mirror) |
| 4685 | // args[2]: the the maximum number of objects to return |
| 4686 | static Object* Runtime_DebugReferencedBy(Arguments args) { |
| 4687 | ASSERT(args.length() == 3); |
| 4688 | |
| 4689 | // First perform a full GC in order to avoid references from dead objects. |
| 4690 | Heap::CollectGarbage(0, OLD_SPACE); |
| 4691 | |
| 4692 | // Check parameters. |
| 4693 | CONVERT_CHECKED(JSObject, target, args[0]); |
| 4694 | Object* instance_filter = args[1]; |
| 4695 | RUNTIME_ASSERT(instance_filter->IsUndefined() || |
| 4696 | instance_filter->IsJSObject()); |
| 4697 | CONVERT_NUMBER_CHECKED(int32_t, max_references, Int32, args[2]); |
| 4698 | RUNTIME_ASSERT(max_references >= 0); |
| 4699 | |
| 4700 | // Get the constructor function for context extension and arguments array. |
| 4701 | JSFunction* context_extension_function = |
| 4702 | Top::context()->global_context()->context_extension_function(); |
| 4703 | JSObject* arguments_boilerplate = |
| 4704 | Top::context()->global_context()->arguments_boilerplate(); |
| 4705 | JSFunction* arguments_function = |
| 4706 | JSFunction::cast(arguments_boilerplate->map()->constructor()); |
| 4707 | |
| 4708 | // Get the number of referencing objects. |
| 4709 | int count; |
| 4710 | count = DebugReferencedBy(target, instance_filter, max_references, |
| 4711 | NULL, 0, |
| 4712 | context_extension_function, arguments_function); |
| 4713 | |
| 4714 | // Allocate an array to hold the result. |
| 4715 | Object* object = Heap::AllocateFixedArray(count); |
| 4716 | if (object->IsFailure()) return object; |
| 4717 | FixedArray* instances = FixedArray::cast(object); |
| 4718 | |
| 4719 | // Fill the referencing objects. |
| 4720 | count = DebugReferencedBy(target, instance_filter, max_references, |
| 4721 | instances, count, |
| 4722 | context_extension_function, arguments_function); |
| 4723 | |
| 4724 | // Return result as JS array. |
| 4725 | Object* result = |
| 4726 | Heap::AllocateJSObject( |
| 4727 | Top::context()->global_context()->array_function()); |
| 4728 | if (!result->IsFailure()) JSArray::cast(result)->SetContent(instances); |
| 4729 | return result; |
| 4730 | } |
| 4731 | |
| 4732 | |
| 4733 | // Helper function used by Runtime_DebugConstructedBy below. |
| 4734 | static int DebugConstructedBy(JSFunction* constructor, int max_references, |
| 4735 | FixedArray* instances, int instances_size) { |
| 4736 | AssertNoAllocation no_alloc; |
| 4737 | |
| 4738 | // Iterate the heap. |
| 4739 | int count = 0; |
| 4740 | HeapIterator iterator; |
| 4741 | while (iterator.has_next() && |
| 4742 | (max_references == 0 || count < max_references)) { |
| 4743 | // Only look at all JSObjects. |
| 4744 | HeapObject* heap_obj = iterator.next(); |
| 4745 | if (heap_obj->IsJSObject()) { |
| 4746 | JSObject* obj = JSObject::cast(heap_obj); |
| 4747 | if (obj->map()->constructor() == constructor) { |
| 4748 | // Valid reference found add to instance array if supplied an update |
| 4749 | // count. |
| 4750 | if (instances != NULL && count < instances_size) { |
| 4751 | instances->set(count, obj); |
| 4752 | } |
| 4753 | count++; |
| 4754 | } |
| 4755 | } |
| 4756 | } |
| 4757 | |
| 4758 | // Return the number of referencing objects found. |
| 4759 | return count; |
| 4760 | } |
| 4761 | |
| 4762 | |
| 4763 | // Scan the heap for objects constructed by a specific function. |
| 4764 | // args[0]: the constructor to find instances of |
| 4765 | // args[1]: the the maximum number of objects to return |
| 4766 | static Object* Runtime_DebugConstructedBy(Arguments args) { |
| 4767 | ASSERT(args.length() == 2); |
| 4768 | |
| 4769 | // First perform a full GC in order to avoid dead objects. |
| 4770 | Heap::CollectGarbage(0, OLD_SPACE); |
| 4771 | |
| 4772 | // Check parameters. |
| 4773 | CONVERT_CHECKED(JSFunction, constructor, args[0]); |
| 4774 | CONVERT_NUMBER_CHECKED(int32_t, max_references, Int32, args[1]); |
| 4775 | RUNTIME_ASSERT(max_references >= 0); |
| 4776 | |
| 4777 | // Get the number of referencing objects. |
| 4778 | int count; |
| 4779 | count = DebugConstructedBy(constructor, max_references, NULL, 0); |
| 4780 | |
| 4781 | // Allocate an array to hold the result. |
| 4782 | Object* object = Heap::AllocateFixedArray(count); |
| 4783 | if (object->IsFailure()) return object; |
| 4784 | FixedArray* instances = FixedArray::cast(object); |
| 4785 | |
| 4786 | // Fill the referencing objects. |
| 4787 | count = DebugConstructedBy(constructor, max_references, instances, count); |
| 4788 | |
| 4789 | // Return result as JS array. |
| 4790 | Object* result = |
| 4791 | Heap::AllocateJSObject( |
| 4792 | Top::context()->global_context()->array_function()); |
| 4793 | if (!result->IsFailure()) JSArray::cast(result)->SetContent(instances); |
| 4794 | return result; |
| 4795 | } |
| 4796 | |
| 4797 | |
| 4798 | static Object* Runtime_GetPrototype(Arguments args) { |
| 4799 | ASSERT(args.length() == 1); |
| 4800 | |
| 4801 | CONVERT_CHECKED(JSObject, obj, args[0]); |
| 4802 | |
| 4803 | return obj->GetPrototype(); |
| 4804 | } |
| 4805 | |
| 4806 | |
| 4807 | static Object* Runtime_SystemBreak(Arguments args) { |
| 4808 | CPU::DebugBreak(); |
| 4809 | return Heap::undefined_value(); |
| 4810 | } |
| 4811 | |
| 4812 | |
| 4813 | // Finds the script object from the script data. NOTE: This operation uses |
| 4814 | // heap traversal to find the function generated for the source position |
| 4815 | // for the requested break point. For lazily compiled functions several heap |
| 4816 | // traversals might be required rendering this operation as a rather slow |
| 4817 | // operation. However for setting break points which is normally done through |
| 4818 | // some kind of user interaction the performance is not crucial. |
| 4819 | static Handle<Object> Runtime_GetScriptFromScriptName( |
| 4820 | Handle<String> script_name) { |
| 4821 | // Scan the heap for Script objects to find the script with the requested |
| 4822 | // script data. |
| 4823 | Handle<Script> script; |
| 4824 | HeapIterator iterator; |
| 4825 | while (script.is_null() && iterator.has_next()) { |
| 4826 | HeapObject* obj = iterator.next(); |
| 4827 | // If a script is found check if it has the script data requested. |
| 4828 | if (obj->IsScript()) { |
| 4829 | if (Script::cast(obj)->name()->IsString()) { |
| 4830 | if (String::cast(Script::cast(obj)->name())->Equals(*script_name)) { |
| 4831 | script = Handle<Script>(Script::cast(obj)); |
| 4832 | } |
| 4833 | } |
| 4834 | } |
| 4835 | } |
| 4836 | |
| 4837 | // If no script with the requested script data is found return undefined. |
| 4838 | if (script.is_null()) return Factory::undefined_value(); |
| 4839 | |
| 4840 | // Return the script found. |
| 4841 | return GetScriptWrapper(script); |
| 4842 | } |
| 4843 | |
| 4844 | |
| 4845 | // Get the script object from script data. NOTE: Regarding performance |
| 4846 | // see the NOTE for GetScriptFromScriptData. |
| 4847 | // args[0]: script data for the script to find the source for |
| 4848 | static Object* Runtime_GetScript(Arguments args) { |
| 4849 | HandleScope scope; |
| 4850 | |
| 4851 | ASSERT(args.length() == 1); |
| 4852 | |
| 4853 | CONVERT_CHECKED(String, script_name, args[0]); |
| 4854 | |
| 4855 | // Find the requested script. |
| 4856 | Handle<Object> result = |
| 4857 | Runtime_GetScriptFromScriptName(Handle<String>(script_name)); |
| 4858 | return *result; |
| 4859 | } |
| 4860 | |
| 4861 | |
| 4862 | static Object* Runtime_FunctionGetAssemblerCode(Arguments args) { |
| 4863 | #ifdef DEBUG |
| 4864 | HandleScope scope; |
| 4865 | ASSERT(args.length() == 1); |
| 4866 | // Get the function and make sure it is compiled. |
| 4867 | CONVERT_ARG_CHECKED(JSFunction, func, 0); |
| 4868 | if (!func->is_compiled() && !CompileLazy(func, KEEP_EXCEPTION)) { |
| 4869 | return Failure::Exception(); |
| 4870 | } |
| 4871 | func->code()->PrintLn(); |
| 4872 | #endif // DEBUG |
| 4873 | return Heap::undefined_value(); |
| 4874 | } |
| 4875 | |
| 4876 | |
| 4877 | static Object* Runtime_Abort(Arguments args) { |
| 4878 | ASSERT(args.length() == 2); |
| 4879 | OS::PrintError("abort: %s\n", reinterpret_cast<char*>(args[0]) + |
| 4880 | Smi::cast(args[1])->value()); |
| 4881 | Top::PrintStack(); |
| 4882 | OS::Abort(); |
| 4883 | UNREACHABLE(); |
| 4884 | return NULL; |
| 4885 | } |
| 4886 | |
| 4887 | |
| 4888 | static Object* Runtime_ListNatives(Arguments args) { |
| 4889 | ASSERT(args.length() == 1); |
| 4890 | HandleScope scope; |
| 4891 | Handle<JSArray> result = Factory::NewJSArray(0); |
| 4892 | int index = 0; |
| 4893 | #define ADD_ENTRY(Name, argc) \ |
| 4894 | { \ |
| 4895 | HandleScope inner; \ |
| 4896 | Handle<String> name = \ |
| 4897 | Factory::NewStringFromAscii(Vector<const char>(#Name, strlen(#Name))); \ |
| 4898 | Handle<JSArray> pair = Factory::NewJSArray(0); \ |
| 4899 | SetElement(pair, 0, name); \ |
| 4900 | SetElement(pair, 1, Handle<Smi>(Smi::FromInt(argc))); \ |
| 4901 | SetElement(result, index++, pair); \ |
| 4902 | } |
| 4903 | RUNTIME_FUNCTION_LIST(ADD_ENTRY) |
| 4904 | #undef ADD_ENTRY |
| 4905 | return *result; |
| 4906 | } |
| 4907 | |
| 4908 | |
| 4909 | static Object* Runtime_IS_VAR(Arguments args) { |
| 4910 | UNREACHABLE(); // implemented as macro in the parser |
| 4911 | return NULL; |
| 4912 | } |
| 4913 | |
| 4914 | |
| 4915 | // ---------------------------------------------------------------------------- |
| 4916 | // Implementation of Runtime |
| 4917 | |
| 4918 | #define F(name, nargs) \ |
| 4919 | { #name, "RuntimeStub_" #name, FUNCTION_ADDR(Runtime_##name), nargs, \ |
| 4920 | static_cast<int>(Runtime::k##name) }, |
| 4921 | |
| 4922 | static Runtime::Function Runtime_functions[] = { |
| 4923 | RUNTIME_FUNCTION_LIST(F) |
| 4924 | { NULL, NULL, NULL, 0, -1 } |
| 4925 | }; |
| 4926 | |
| 4927 | #undef F |
| 4928 | |
| 4929 | |
| 4930 | Runtime::Function* Runtime::FunctionForId(FunctionId fid) { |
| 4931 | ASSERT(0 <= fid && fid < kNofFunctions); |
| 4932 | return &Runtime_functions[fid]; |
| 4933 | } |
| 4934 | |
| 4935 | |
| 4936 | Runtime::Function* Runtime::FunctionForName(const char* name) { |
| 4937 | for (Function* f = Runtime_functions; f->name != NULL; f++) { |
| 4938 | if (strcmp(f->name, name) == 0) { |
| 4939 | return f; |
| 4940 | } |
| 4941 | } |
| 4942 | return NULL; |
| 4943 | } |
| 4944 | |
| 4945 | |
| 4946 | void Runtime::PerformGC(Object* result) { |
| 4947 | Failure* failure = Failure::cast(result); |
| 4948 | // Try to do a garbage collection; ignore it if it fails. The C |
| 4949 | // entry stub will throw an out-of-memory exception in that case. |
| 4950 | Heap::CollectGarbage(failure->requested(), failure->allocation_space()); |
| 4951 | } |
| 4952 | |
| 4953 | |
| 4954 | } } // namespace v8::internal |