Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2007-2008 the V8 project authors. 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 "heap.h" |
| 33 | #include "cctest.h" |
| 34 | |
| 35 | using namespace v8; |
| 36 | |
| 37 | |
| 38 | enum Expectations { |
| 39 | EXPECT_RESULT, |
| 40 | EXPECT_EXCEPTION |
| 41 | }; |
| 42 | |
| 43 | |
| 44 | // A DeclarationContext holds a reference to a v8::Context and keeps |
| 45 | // track of various declaration related counters to make it easier to |
| 46 | // track if global declarations in the presence of interceptors behave |
| 47 | // the right way. |
| 48 | class DeclarationContext { |
| 49 | public: |
| 50 | DeclarationContext(); |
| 51 | |
| 52 | virtual ~DeclarationContext() { |
| 53 | if (is_initialized_) { |
| 54 | context_->Exit(); |
| 55 | context_.Dispose(); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | void Check(const char* source, |
| 60 | int get, int set, int has, |
| 61 | Expectations expectations, |
| 62 | v8::Handle<Value> value = Local<Value>()); |
| 63 | |
| 64 | int get_count() const { return get_count_; } |
| 65 | int set_count() const { return set_count_; } |
| 66 | int has_count() const { return has_count_; } |
| 67 | |
| 68 | protected: |
| 69 | virtual v8::Handle<Value> Get(Local<String> key); |
| 70 | virtual v8::Handle<Value> Set(Local<String> key, Local<Value> value); |
| 71 | virtual v8::Handle<Boolean> Has(Local<String> key); |
| 72 | |
| 73 | void InitializeIfNeeded(); |
| 74 | |
| 75 | // Get the holder for the interceptor. Default to the instance template |
| 76 | // but may be overwritten. |
| 77 | virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) { |
| 78 | return function->InstanceTemplate(); |
| 79 | } |
| 80 | |
| 81 | // The handlers are called as static functions that forward |
| 82 | // to the instance specific virtual methods. |
| 83 | static v8::Handle<Value> HandleGet(Local<String> key, |
| 84 | const AccessorInfo& info); |
| 85 | static v8::Handle<Value> HandleSet(Local<String> key, |
| 86 | Local<Value> value, |
| 87 | const AccessorInfo& info); |
| 88 | static v8::Handle<Boolean> HandleHas(Local<String> key, |
| 89 | const AccessorInfo& info); |
| 90 | |
| 91 | private: |
| 92 | bool is_initialized_; |
| 93 | Persistent<Context> context_; |
| 94 | Local<String> property_; |
| 95 | |
| 96 | int get_count_; |
| 97 | int set_count_; |
| 98 | int has_count_; |
| 99 | |
| 100 | static DeclarationContext* GetInstance(const AccessorInfo& info); |
| 101 | }; |
| 102 | |
| 103 | |
| 104 | DeclarationContext::DeclarationContext() |
| 105 | : is_initialized_(false), get_count_(0), set_count_(0), has_count_(0) { |
| 106 | // Do nothing. |
| 107 | } |
| 108 | |
| 109 | |
| 110 | void DeclarationContext::InitializeIfNeeded() { |
| 111 | if (is_initialized_) return; |
| 112 | HandleScope scope; |
| 113 | Local<FunctionTemplate> function = FunctionTemplate::New(); |
| 114 | Local<Value> data = External::New(this); |
| 115 | GetHolder(function)->SetNamedPropertyHandler(&HandleGet, |
| 116 | &HandleSet, |
| 117 | &HandleHas, |
| 118 | 0, 0, |
| 119 | data); |
| 120 | context_ = Context::New(0, function->InstanceTemplate(), Local<Value>()); |
| 121 | context_->Enter(); |
| 122 | is_initialized_ = true; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | void DeclarationContext::Check(const char* source, |
| 127 | int get, int set, int has, |
| 128 | Expectations expectations, |
| 129 | v8::Handle<Value> value) { |
| 130 | InitializeIfNeeded(); |
| 131 | // A retry after a GC may pollute the counts, so perform gc now |
| 132 | // to avoid that. |
| 133 | v8::internal::Heap::CollectGarbage(0, v8::internal::NEW_SPACE); |
| 134 | HandleScope scope; |
| 135 | TryCatch catcher; |
| 136 | catcher.SetVerbose(true); |
| 137 | Local<Value> result = Script::Compile(String::New(source))->Run(); |
| 138 | CHECK_EQ(get, get_count()); |
| 139 | CHECK_EQ(set, set_count()); |
| 140 | CHECK_EQ(has, has_count()); |
| 141 | if (expectations == EXPECT_RESULT) { |
| 142 | CHECK(!catcher.HasCaught()); |
| 143 | if (!value.IsEmpty()) { |
| 144 | CHECK_EQ(value, result); |
| 145 | } |
| 146 | } else { |
| 147 | CHECK(expectations == EXPECT_EXCEPTION); |
| 148 | CHECK(catcher.HasCaught()); |
| 149 | if (!value.IsEmpty()) { |
| 150 | CHECK_EQ(value, catcher.Exception()); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | |
| 156 | v8::Handle<Value> DeclarationContext::HandleGet(Local<String> key, |
| 157 | const AccessorInfo& info) { |
| 158 | DeclarationContext* context = GetInstance(info); |
| 159 | context->get_count_++; |
| 160 | return context->Get(key); |
| 161 | } |
| 162 | |
| 163 | |
| 164 | v8::Handle<Value> DeclarationContext::HandleSet(Local<String> key, |
| 165 | Local<Value> value, |
| 166 | const AccessorInfo& info) { |
| 167 | DeclarationContext* context = GetInstance(info); |
| 168 | context->set_count_++; |
| 169 | return context->Set(key, value); |
| 170 | } |
| 171 | |
| 172 | |
| 173 | v8::Handle<Boolean> DeclarationContext::HandleHas(Local<String> key, |
| 174 | const AccessorInfo& info) { |
| 175 | DeclarationContext* context = GetInstance(info); |
| 176 | context->has_count_++; |
| 177 | return context->Has(key); |
| 178 | } |
| 179 | |
| 180 | |
| 181 | DeclarationContext* DeclarationContext::GetInstance(const AccessorInfo& info) { |
| 182 | return static_cast<DeclarationContext*>(External::Unwrap(info.Data())); |
| 183 | } |
| 184 | |
| 185 | |
| 186 | v8::Handle<Value> DeclarationContext::Get(Local<String> key) { |
| 187 | return v8::Handle<Value>(); |
| 188 | } |
| 189 | |
| 190 | |
| 191 | v8::Handle<Value> DeclarationContext::Set(Local<String> key, |
| 192 | Local<Value> value) { |
| 193 | return v8::Handle<Value>(); |
| 194 | } |
| 195 | |
| 196 | |
| 197 | v8::Handle<Boolean> DeclarationContext::Has(Local<String> key) { |
| 198 | return v8::Handle<Boolean>(); |
| 199 | } |
| 200 | |
| 201 | |
| 202 | // Test global declaration of a property the interceptor doesn't know |
| 203 | // about and doesn't handle. |
| 204 | TEST(Unknown) { |
| 205 | HandleScope scope; |
| 206 | |
| 207 | { DeclarationContext context; |
| 208 | context.Check("var x; x", |
| 209 | 1, // access |
| 210 | 1, // declaration |
| 211 | 2, // declaration + initialization |
| 212 | EXPECT_RESULT, Undefined()); |
| 213 | } |
| 214 | |
| 215 | { DeclarationContext context; |
| 216 | context.Check("var x = 0; x", |
| 217 | 1, // access |
| 218 | 2, // declaration + initialization |
| 219 | 2, // declaration + initialization |
| 220 | EXPECT_RESULT, Number::New(0)); |
| 221 | } |
| 222 | |
| 223 | { DeclarationContext context; |
| 224 | context.Check("function x() { }; x", |
| 225 | 1, // access |
| 226 | 1, // declaration |
| 227 | 0, |
| 228 | EXPECT_RESULT); |
| 229 | } |
| 230 | |
| 231 | { DeclarationContext context; |
| 232 | context.Check("const x; x", |
| 233 | 1, // access |
| 234 | 2, // declaration + initialization |
| 235 | 2, // declaration + initialization |
| 236 | EXPECT_RESULT, Undefined()); |
| 237 | } |
| 238 | |
| 239 | { DeclarationContext context; |
| 240 | context.Check("const x = 0; x", |
| 241 | 1, // access |
| 242 | 2, // declaration + initialization |
| 243 | 2, // declaration + initialization |
| 244 | EXPECT_RESULT, Undefined()); // SB 0 - BUG 1213579 |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | |
| 249 | |
| 250 | class PresentPropertyContext: public DeclarationContext { |
| 251 | protected: |
| 252 | virtual v8::Handle<Boolean> Has(Local<String> key) { |
| 253 | return True(); |
| 254 | } |
| 255 | }; |
| 256 | |
| 257 | |
| 258 | |
| 259 | TEST(Present) { |
| 260 | HandleScope scope; |
| 261 | |
| 262 | { PresentPropertyContext context; |
| 263 | context.Check("var x; x", |
| 264 | 1, // access |
| 265 | 0, |
| 266 | 2, // declaration + initialization |
| 267 | EXPECT_EXCEPTION); // x is not defined! |
| 268 | } |
| 269 | |
| 270 | { PresentPropertyContext context; |
| 271 | context.Check("var x = 0; x", |
| 272 | 1, // access |
| 273 | 1, // initialization |
| 274 | 2, // declaration + initialization |
| 275 | EXPECT_RESULT, Number::New(0)); |
| 276 | } |
| 277 | |
| 278 | { PresentPropertyContext context; |
| 279 | context.Check("function x() { }; x", |
| 280 | 1, // access |
| 281 | 1, // declaration |
| 282 | 0, |
| 283 | EXPECT_RESULT); |
| 284 | } |
| 285 | |
| 286 | { PresentPropertyContext context; |
| 287 | context.Check("const x; x", |
| 288 | 0, |
| 289 | 0, |
| 290 | 1, // (re-)declaration |
| 291 | EXPECT_EXCEPTION); // x has already been declared! |
| 292 | } |
| 293 | |
| 294 | { PresentPropertyContext context; |
| 295 | context.Check("const x = 0; x", |
| 296 | 0, |
| 297 | 0, |
| 298 | 1, // (re-)declaration |
| 299 | EXPECT_EXCEPTION); // x has already been declared! |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | |
| 304 | |
| 305 | class AbsentPropertyContext: public DeclarationContext { |
| 306 | protected: |
| 307 | virtual v8::Handle<Boolean> Has(Local<String> key) { |
| 308 | return False(); |
| 309 | } |
| 310 | }; |
| 311 | |
| 312 | |
| 313 | TEST(Absent) { |
| 314 | HandleScope scope; |
| 315 | |
| 316 | { AbsentPropertyContext context; |
| 317 | context.Check("var x; x", |
| 318 | 1, // access |
| 319 | 2, // declaration + initialization |
| 320 | 2, // declaration + initialization |
| 321 | EXPECT_RESULT, Undefined()); |
| 322 | } |
| 323 | |
| 324 | { AbsentPropertyContext context; |
| 325 | context.Check("var x = 0; x", |
| 326 | 1, // access |
| 327 | 2, // declaration + initialization |
| 328 | 2, // declaration + initialization |
| 329 | EXPECT_RESULT, Number::New(0)); |
| 330 | } |
| 331 | |
| 332 | { AbsentPropertyContext context; |
| 333 | context.Check("function x() { }; x", |
| 334 | 1, // access |
| 335 | 1, // declaration |
| 336 | 0, |
| 337 | EXPECT_RESULT); |
| 338 | } |
| 339 | |
| 340 | { AbsentPropertyContext context; |
| 341 | context.Check("const x; x", |
| 342 | 1, // access |
| 343 | 2, // declaration + initialization |
| 344 | 2, // declaration + initializetion |
| 345 | EXPECT_RESULT, Undefined()); |
| 346 | } |
| 347 | |
| 348 | { AbsentPropertyContext context; |
| 349 | context.Check("const x = 0; x", |
| 350 | 1, // access |
| 351 | 2, // declaration + initialization |
| 352 | 2, // declaration + initialization |
| 353 | EXPECT_RESULT, Undefined()); // SB 0 - BUG 1213579 |
| 354 | } |
| 355 | |
| 356 | { AbsentPropertyContext context; |
| 357 | context.Check("if (false) { var x = 0 }; x", |
| 358 | 1, // access |
| 359 | 1, // declaration |
| 360 | 1, // declaration + initialization |
| 361 | EXPECT_RESULT, Undefined()); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | |
| 366 | |
| 367 | class AppearingPropertyContext: public DeclarationContext { |
| 368 | public: |
| 369 | enum State { |
| 370 | DECLARE, |
| 371 | INITIALIZE_IF_ASSIGN, |
| 372 | UNKNOWN |
| 373 | }; |
| 374 | |
| 375 | AppearingPropertyContext() : state_(DECLARE) { } |
| 376 | |
| 377 | protected: |
| 378 | virtual v8::Handle<Boolean> Has(Local<String> key) { |
| 379 | switch (state_) { |
| 380 | case DECLARE: |
| 381 | // Force declaration by returning that the |
| 382 | // property is absent. |
| 383 | state_ = INITIALIZE_IF_ASSIGN; |
| 384 | return False(); |
| 385 | case INITIALIZE_IF_ASSIGN: |
| 386 | // Return that the property is present so we only get the |
| 387 | // setter called when initializing with a value. |
| 388 | state_ = UNKNOWN; |
| 389 | return True(); |
| 390 | default: |
| 391 | CHECK(state_ == UNKNOWN); |
| 392 | break; |
| 393 | } |
| 394 | // Do the lookup in the object. |
| 395 | return v8::Local<Boolean>(); |
| 396 | } |
| 397 | |
| 398 | private: |
| 399 | State state_; |
| 400 | }; |
| 401 | |
| 402 | |
| 403 | TEST(Appearing) { |
| 404 | HandleScope scope; |
| 405 | |
| 406 | { AppearingPropertyContext context; |
| 407 | context.Check("var x; x", |
| 408 | 1, // access |
| 409 | 1, // declaration |
| 410 | 2, // declaration + initialization |
| 411 | EXPECT_RESULT, Undefined()); |
| 412 | } |
| 413 | |
| 414 | { AppearingPropertyContext context; |
| 415 | context.Check("var x = 0; x", |
| 416 | 1, // access |
| 417 | 2, // declaration + initialization |
| 418 | 2, // declaration + initialization |
| 419 | EXPECT_RESULT, Number::New(0)); |
| 420 | } |
| 421 | |
| 422 | { AppearingPropertyContext context; |
| 423 | context.Check("function x() { }; x", |
| 424 | 1, // access |
| 425 | 1, // declaration |
| 426 | 0, |
| 427 | EXPECT_RESULT); |
| 428 | } |
| 429 | |
| 430 | { AppearingPropertyContext context; |
| 431 | context.Check("const x; x", |
| 432 | 0, |
| 433 | 1, // declaration |
| 434 | 2, // declaration + initialization |
| 435 | EXPECT_EXCEPTION); // x has already been declared! |
| 436 | } |
| 437 | |
| 438 | { AppearingPropertyContext context; |
| 439 | context.Check("const x = 0; x", |
| 440 | 0, |
| 441 | 1, // declaration |
| 442 | 2, // declaration + initialization |
| 443 | EXPECT_EXCEPTION); // x has already been declared! |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | |
| 448 | |
| 449 | class ReappearingPropertyContext: public DeclarationContext { |
| 450 | public: |
| 451 | enum State { |
| 452 | DECLARE, |
| 453 | DONT_DECLARE, |
| 454 | INITIALIZE, |
| 455 | UNKNOWN |
| 456 | }; |
| 457 | |
| 458 | ReappearingPropertyContext() : state_(DECLARE) { } |
| 459 | |
| 460 | protected: |
| 461 | virtual v8::Handle<Boolean> Has(Local<String> key) { |
| 462 | switch (state_) { |
| 463 | case DECLARE: |
| 464 | // Force the first declaration by returning that |
| 465 | // the property is absent. |
| 466 | state_ = DONT_DECLARE; |
| 467 | return False(); |
| 468 | case DONT_DECLARE: |
| 469 | // Ignore the second declaration by returning |
| 470 | // that the property is already there. |
| 471 | state_ = INITIALIZE; |
| 472 | return True(); |
| 473 | case INITIALIZE: |
| 474 | // Force an initialization by returning that |
| 475 | // the property is absent. This will make sure |
| 476 | // that the setter is called and it will not |
| 477 | // lead to redeclaration conflicts (yet). |
| 478 | state_ = UNKNOWN; |
| 479 | return False(); |
| 480 | default: |
| 481 | CHECK(state_ == UNKNOWN); |
| 482 | break; |
| 483 | } |
| 484 | // Do the lookup in the object. |
| 485 | return v8::Local<Boolean>(); |
| 486 | } |
| 487 | |
| 488 | private: |
| 489 | State state_; |
| 490 | }; |
| 491 | |
| 492 | |
| 493 | TEST(Reappearing) { |
| 494 | HandleScope scope; |
| 495 | |
| 496 | { ReappearingPropertyContext context; |
| 497 | context.Check("const x; var x = 0", |
| 498 | 0, |
| 499 | 2, // var declaration + const initialization |
| 500 | 4, // 2 x declaration + 2 x initialization |
| 501 | EXPECT_EXCEPTION); // x has already been declared! |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | |
| 506 | |
| 507 | class ExistsInPrototypeContext: public DeclarationContext { |
| 508 | protected: |
| 509 | virtual v8::Handle<Boolean> Has(Local<String> key) { |
| 510 | // Let it seem that the property exists in the prototype object. |
| 511 | return True(); |
| 512 | } |
| 513 | |
| 514 | // Use the prototype as the holder for the interceptors. |
| 515 | virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) { |
| 516 | return function->PrototypeTemplate(); |
| 517 | } |
| 518 | }; |
| 519 | |
| 520 | |
| 521 | TEST(ExistsInPrototype) { |
| 522 | HandleScope scope; |
| 523 | |
| 524 | // Sanity check to make sure that the holder of the interceptor |
| 525 | // really is the prototype object. |
| 526 | { ExistsInPrototypeContext context; |
| 527 | context.Check("this.x = 87; this.x", |
| 528 | 0, |
| 529 | 0, |
| 530 | 0, |
| 531 | EXPECT_RESULT, Number::New(87)); |
| 532 | } |
| 533 | |
| 534 | { ExistsInPrototypeContext context; |
| 535 | context.Check("var x; x", |
| 536 | 1, // get |
| 537 | 0, |
| 538 | 1, // declaration |
| 539 | EXPECT_EXCEPTION); |
| 540 | } |
| 541 | |
| 542 | { ExistsInPrototypeContext context; |
| 543 | context.Check("var x = 0; x", |
| 544 | 0, |
| 545 | 0, |
| 546 | 1, // declaration |
| 547 | EXPECT_RESULT, Number::New(0)); |
| 548 | } |
| 549 | |
| 550 | { ExistsInPrototypeContext context; |
| 551 | context.Check("const x; x", |
| 552 | 0, |
| 553 | 0, |
| 554 | 1, // declaration |
| 555 | EXPECT_RESULT, Undefined()); |
| 556 | } |
| 557 | |
| 558 | { ExistsInPrototypeContext context; |
| 559 | context.Check("const x = 0; x", |
| 560 | 0, |
| 561 | 0, |
| 562 | 1, // declaration |
| 563 | EXPECT_RESULT, Number::New(0)); |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | |
| 568 | |
| 569 | class AbsentInPrototypeContext: public DeclarationContext { |
| 570 | protected: |
| 571 | virtual v8::Handle<Boolean> Has(Local<String> key) { |
| 572 | // Let it seem that the property is absent in the prototype object. |
| 573 | return False(); |
| 574 | } |
| 575 | |
| 576 | // Use the prototype as the holder for the interceptors. |
| 577 | virtual Local<ObjectTemplate> GetHolder(Local<FunctionTemplate> function) { |
| 578 | return function->PrototypeTemplate(); |
| 579 | } |
| 580 | }; |
| 581 | |
| 582 | |
| 583 | TEST(AbsentInPrototype) { |
| 584 | HandleScope scope; |
| 585 | |
| 586 | { AbsentInPrototypeContext context; |
| 587 | context.Check("if (false) { var x = 0; }; x", |
| 588 | 0, |
| 589 | 0, |
| 590 | 1, // declaration |
| 591 | EXPECT_RESULT, Undefined()); |
| 592 | } |
| 593 | } |