WebKit/Source/JavaScriptCore/runtime/AtomicsObject.cpp at main · WebKit/WebKit · GitHub

History

743 lines (623 loc) · 29.7 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "config.h"

#include "AtomicsObject.h"

#include "FrameTracers.h"

#include "JSCInlines.h"

#include "JSTypedArrays.h"

#include "ReleaseHeapAccessScope.h"

#include "TypedArrayController.h"

#include "WaiterListManager.h"

WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN

namespace JSC {

STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(AtomicsObject);

#define FOR_EACH_ATOMICS_FUNC(macro) \

macro(add, Add, 3) \

macro(and, And, 3) \

macro(compareExchange, CompareExchange, 4) \

macro(exchange, Exchange, 3) \

macro(isLockFree, IsLockFree, 1) \

macro(load, Load, 2) \

macro(notify, Notify, 3) \

macro(or, Or, 3) \

macro(store, Store, 3) \

macro(sub, Sub, 3) \

macro(wait, Wait, 4) \

macro(xor, Xor, 3)

#define DECLARE_FUNC_PROTO(lowerName, upperName, count) \

static JSC_DECLARE_HOST_FUNCTION(atomicsFunc ## upperName);

FOR_EACH_ATOMICS_FUNC(DECLARE_FUNC_PROTO)

#undef DECLARE_FUNC_PROTO

static JSC_DECLARE_HOST_FUNCTION(atomicsFuncWaitAsync);

static JSC_DECLARE_HOST_FUNCTION(atomicsFuncPause);

const ClassInfo AtomicsObject::s_info = { "Atomics"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(AtomicsObject) };

AtomicsObject::AtomicsObject(VM& vm, Structure* structure)

: JSNonFinalObject(vm, structure)

{

}

AtomicsObject* AtomicsObject::create(VM& vm, JSGlobalObject* globalObject, Structure* structure)

{

AtomicsObject* object = new (NotNull, allocateCell<AtomicsObject>(vm)) AtomicsObject(vm, structure);

object->finishCreation(vm, globalObject);

return object;

}

Structure* AtomicsObject::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)

{

return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());

}

void AtomicsObject::finishCreation(VM& vm, JSGlobalObject* globalObject)

{

Base::finishCreation(vm);

ASSERT(inherits(info()));

#define PUT_DIRECT_NATIVE_FUNC(lowerName, upperName, count) \

putDirectNativeFunctionWithoutTransition(vm, globalObject, Identifier::fromString(vm, #lowerName ""_s), count, atomicsFunc ## upperName, ImplementationVisibility::Public, Atomics ## upperName ## Intrinsic, static_cast<unsigned>(PropertyAttribute::DontEnum));

FOR_EACH_ATOMICS_FUNC(PUT_DIRECT_NATIVE_FUNC)

#undef PUT_DIRECT_NATIVE_FUNC

JSC_NATIVE_INTRINSIC_FUNCTION_WITHOUT_TRANSITION("pause"_s, atomicsFuncPause, static_cast<unsigned>(PropertyAttribute::DontEnum), 0, ImplementationVisibility::Public, AtomicsPauseIntrinsic);

if (vm.vmType == VM::VMType::Default)

JSC_NATIVE_INTRINSIC_FUNCTION_WITHOUT_TRANSITION("waitAsync"_s, atomicsFuncWaitAsync, static_cast<unsigned>(PropertyAttribute::DontEnum), 4, ImplementationVisibility::Public, AtomicsWaitAsyncIntrinsic);

JSC_TO_STRING_TAG_WITHOUT_TRANSITION();

}

namespace {

template<typename Adaptor, typename Func>

EncodedJSValue atomicReadModifyWriteCase(JSGlobalObject* globalObject, VM& vm, const JSValue* args, JSArrayBufferView* typedArrayView, uint64_t accessIndex, const Func& func)

{

auto scope = DECLARE_THROW_SCOPE(vm);

JSGenericTypedArrayView<Adaptor>* typedArray = uncheckedDowncast<JSGenericTypedArrayView<Adaptor>>(typedArrayView);

typename Adaptor::Type extraArgs[Func::numExtraArgs + 1]; // Add 1 to avoid 0 size array error in VS.

for (unsigned i = 0; i < Func::numExtraArgs; ++i) {

auto value = toNativeFromValue<Adaptor>(globalObject, args[2 + i]);

RETURN_IF_EXCEPTION(scope, { });

extraArgs[i] = value;

}

if (typedArray->isDetached() || !typedArray->inBounds(accessIndex))

return throwVMTypeError(globalObject, scope, typedArrayBufferHasBeenDetachedErrorMessage);

auto result = func(typedArray->typedVector() + accessIndex, extraArgs);

RELEASE_AND_RETURN(scope, JSValue::encode(Adaptor::toJSValue(globalObject, result)));

}

static uint64_t validateAtomicAccess(JSGlobalObject* globalObject, VM& vm, JSArrayBufferView* typedArrayView, JSValue accessIndexValue)

{

auto scope = DECLARE_THROW_SCOPE(vm);

uint64_t accessIndex = 0;

size_t length = typedArrayView->length();

if (accessIndexValue.isUInt32()) [[likely]]

accessIndex = accessIndexValue.asUInt32();

else {

accessIndex = accessIndexValue.toIndex(globalObject, "accessIndex"_s);

RETURN_IF_EXCEPTION(scope, 0);

}

if (accessIndex >= length) {

throwRangeError(globalObject, scope, "Access index out of bounds for atomic access."_s);

return 0;

}

return accessIndex;

}

enum class TypedArrayOperationMode { ReadWrite, Wait };

template<TypedArrayOperationMode mode>

inline JSArrayBufferView* validateIntegerTypedArray(JSGlobalObject* globalObject, JSValue typedArrayValue)

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

JSArrayBufferView* typedArray = validateTypedArray(globalObject, typedArrayValue);

RETURN_IF_EXCEPTION(scope, { });

if constexpr (mode == TypedArrayOperationMode::Wait) {

switch (typedArray->type()) {

case Int32ArrayType:

case BigInt64ArrayType:

break;

default:

throwTypeError(globalObject, scope, "Typed array argument must be an Int32Array or BigInt64Array."_s);

return { };

}

} else {

switch (typedArray->type()) {

case Int8ArrayType:

case Int16ArrayType:

case Int32ArrayType:

case Uint8ArrayType:

case Uint16ArrayType:

case Uint32ArrayType:

case BigInt64ArrayType:

case BigUint64ArrayType:

break;

default:

throwTypeError(globalObject, scope, "Typed array argument must be an Int8Array, Int16Array, Int32Array, Uint8Array, Uint16Array, Uint32Array, BigInt64Array, or BigUint64Array."_s);

return { };

}

return typedArray;

}

template<typename Func>

EncodedJSValue atomicReadModifyWrite(JSGlobalObject* globalObject, VM& vm, const JSValue* args, const Func& func)

{

auto scope = DECLARE_THROW_SCOPE(vm);

JSArrayBufferView* typedArrayView = validateIntegerTypedArray<TypedArrayOperationMode::ReadWrite>(globalObject, args[0]);

RETURN_IF_EXCEPTION(scope, { });

uint64_t accessIndex = validateAtomicAccess(globalObject, vm, typedArrayView, args[1]);

RETURN_IF_EXCEPTION(scope, { });

scope.release();

switch (typedArrayView->type()) {

case Int8ArrayType:

return atomicReadModifyWriteCase<Int8Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case Int16ArrayType:

return atomicReadModifyWriteCase<Int16Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case Int32ArrayType:

return atomicReadModifyWriteCase<Int32Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case Uint8ArrayType:

return atomicReadModifyWriteCase<Uint8Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case Uint16ArrayType:

return atomicReadModifyWriteCase<Uint16Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case Uint32ArrayType:

return atomicReadModifyWriteCase<Uint32Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case BigInt64ArrayType:

return atomicReadModifyWriteCase<BigInt64Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

case BigUint64ArrayType:

return atomicReadModifyWriteCase<BigUint64Adaptor>(globalObject, vm, args, typedArrayView, accessIndex, func);

default:

RELEASE_ASSERT_NOT_REACHED();

return JSValue::encode(jsUndefined());

}

template<typename Func>

EncodedJSValue atomicReadModifyWrite(JSGlobalObject* globalObject, CallFrame* callFrame, const Func& func)

{

JSValue args[2 + Func::numExtraArgs];

for (unsigned i = 2 + Func::numExtraArgs; i--;)

args[i] = callFrame->argument(i);

return atomicReadModifyWrite(globalObject, globalObject->vm(), args, func);

}

struct AddFunc {

static constexpr unsigned numExtraArgs = 1;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

return WTF::atomicExchangeAdd(ptr, args[0]);

}

};

struct AndFunc {

static constexpr unsigned numExtraArgs = 1;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

return WTF::atomicExchangeAnd(ptr, args[0]);

}

};

struct CompareExchangeFunc {

static constexpr unsigned numExtraArgs = 2;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

T expected = args[0];

T newValue = args[1];

return WTF::atomicCompareExchangeStrong(ptr, expected, newValue);

}

};

struct ExchangeFunc {

static constexpr unsigned numExtraArgs = 1;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

return WTF::atomicExchange(ptr, args[0]);

}

};

struct LoadFunc {

static constexpr unsigned numExtraArgs = 0;

template<typename T>

T operator()(T* ptr, const T*) const

{

return WTF::atomicLoadFullyFenced(ptr);

}

};

struct OrFunc {

static constexpr unsigned numExtraArgs = 1;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

return WTF::atomicExchangeOr(ptr, args[0]);

}

};

struct SubFunc {

static constexpr unsigned numExtraArgs = 1;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

return WTF::atomicExchangeSub(ptr, args[0]);

}

};

struct XorFunc {

static constexpr unsigned numExtraArgs = 1;

template<typename T>

T NODELETE operator()(T* ptr, const T* args) const

{

return WTF::atomicExchangeXor(ptr, args[0]);

}

};

EncodedJSValue isLockFree(JSGlobalObject* globalObject, JSValue arg)

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

int32_t size = arg.toInt32(globalObject);

RETURN_IF_EXCEPTION(scope, JSValue::encode(jsUndefined()));

bool result;

switch (size) {

case 1:

case 2:

case 4:

case 8:

result = true;

break;

default:

result = false;

break;

}

return JSValue::encode(jsBoolean(result));

}

template<typename Adaptor>

EncodedJSValue atomicStoreCase(JSGlobalObject* globalObject, VM& vm, JSValue operand, JSArrayBufferView* typedArrayView, uint64_t accessIndex)

{

auto scope = DECLARE_THROW_SCOPE(vm);

JSGenericTypedArrayView<Adaptor>* typedArray = uncheckedDowncast<JSGenericTypedArrayView<Adaptor>>(typedArrayView);

typename Adaptor::Type extraArg;

JSValue value;

if constexpr (std::is_same_v<Adaptor, BigInt64Adaptor> || std::is_same_v<Adaptor, BigUint64Adaptor>) {

value = operand.toBigInt(globalObject);

RETURN_IF_EXCEPTION(scope, { });

extraArg = toNativeFromValue<Adaptor>(globalObject, value);

RETURN_IF_EXCEPTION(scope, { });

} else {

value = jsNumber(operand.toIntegerOrInfinity(globalObject));

RETURN_IF_EXCEPTION(scope, { });

extraArg = toNativeFromValue<Adaptor>(globalObject, value);

RETURN_IF_EXCEPTION(scope, { });

}

if (typedArray->isDetached() || !typedArray->inBounds(accessIndex))

return throwVMTypeError(globalObject, scope, typedArrayBufferHasBeenDetachedErrorMessage);

WTF::atomicStoreFullyFenced(typedArray->typedVector() + accessIndex, extraArg);

RELEASE_AND_RETURN(scope, JSValue::encode(value));

}

EncodedJSValue atomicStore(JSGlobalObject* globalObject, VM& vm, JSValue base, JSValue index, JSValue operand)

{

// https://tc39.es/ecma262/#sec-atomics.store

auto scope = DECLARE_THROW_SCOPE(vm);

JSArrayBufferView* typedArrayView = validateIntegerTypedArray<TypedArrayOperationMode::ReadWrite>(globalObject, base);

RETURN_IF_EXCEPTION(scope, { });

uint64_t accessIndex = validateAtomicAccess(globalObject, vm, typedArrayView, index);

RETURN_IF_EXCEPTION(scope, { });

scope.release();

switch (typedArrayView->type()) {

case Int8ArrayType:

return atomicStoreCase<Int8Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case Int16ArrayType:

return atomicStoreCase<Int16Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case Int32ArrayType:

return atomicStoreCase<Int32Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case Uint8ArrayType:

return atomicStoreCase<Uint8Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case Uint16ArrayType:

return atomicStoreCase<Uint16Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case Uint32ArrayType:

return atomicStoreCase<Uint32Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case BigInt64ArrayType:

return atomicStoreCase<BigInt64Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

case BigUint64ArrayType:

return atomicStoreCase<BigUint64Adaptor>(globalObject, vm, operand, typedArrayView, accessIndex);

default:

RELEASE_ASSERT_NOT_REACHED();

return { };

}

} // anonymous namespace

JSC_DEFINE_HOST_FUNCTION(atomicsFuncAdd, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, AddFunc());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncAnd, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, AndFunc());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncCompareExchange, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, CompareExchangeFunc());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncExchange, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, ExchangeFunc());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncIsLockFree, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return isLockFree(globalObject, callFrame->argument(0));

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncLoad, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, LoadFunc());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncOr, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, OrFunc());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncStore, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicStore(globalObject, globalObject->vm(), callFrame->argument(0), callFrame->argument(1), callFrame->argument(2));

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncSub, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, SubFunc());

}

template<typename ValueType, typename JSArrayType>

JSValue atomicsWaitImpl(JSGlobalObject* globalObject, JSArrayType* typedArray, uint64_t accessIndex, ValueType expectedValue, JSValue timeoutValue, AtomicsWaitType type)

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

ValueType* ptr = typedArray->typedVector() + accessIndex;

double timeoutInMilliseconds = timeoutValue.toNumber(globalObject);

RETURN_IF_EXCEPTION(scope, { });

Seconds timeout = Seconds::infinity();

if (!std::isnan(timeoutInMilliseconds))

timeout = std::max(Seconds::fromMilliseconds(timeoutInMilliseconds), 0_s);

if (type == AtomicsWaitType::Async)

return WaiterListManager::singleton().waitAsync(globalObject, vm, ptr, expectedValue, timeout);

if (!vm.m_typedArrayController->isAtomicsWaitAllowedOnCurrentThread()) {

throwTypeError(globalObject, scope, "Atomics.wait cannot be called from the current thread."_s);

return { };

}

auto result = WaiterListManager::singleton().waitSync(vm, ptr, expectedValue, timeout);

switch (result) {

case WaiterListManager::WaitSyncResult::OK:

return vm.smallStrings.okString();

case WaiterListManager::WaitSyncResult::NotEqual:

return vm.smallStrings.notEqualString();

case WaiterListManager::WaitSyncResult::TimedOut:

return vm.smallStrings.timedOutString();

case WaiterListManager::WaitSyncResult::Terminated:

vm.throwTerminationExceptionIfNeeded();

return { };

}

RELEASE_ASSERT_NOT_REACHED();

return { };

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncWait, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

auto* typedArrayView = validateIntegerTypedArray<TypedArrayOperationMode::Wait>(globalObject, callFrame->argument(0));

RETURN_IF_EXCEPTION(scope, { });

if (!typedArrayView->isShared())

return throwVMTypeError(globalObject, scope, "Typed array for wait/waitAsync/notify must wrap a SharedArrayBuffer."_s);

uint64_t accessIndex = validateAtomicAccess(globalObject, vm, typedArrayView, callFrame->argument(1));

RETURN_IF_EXCEPTION(scope, { });

switch (typedArrayView->type()) {

case Int32ArrayType: {

int32_t expectedValue = callFrame->argument(2).toInt32(globalObject);

RETURN_IF_EXCEPTION(scope, { });

RELEASE_AND_RETURN(scope, JSValue::encode(atomicsWaitImpl<int32_t>(globalObject, uncheckedDowncast<JSInt32Array>(typedArrayView), accessIndex, expectedValue, callFrame->argument(3), AtomicsWaitType::Sync)));

}

case BigInt64ArrayType: {

int64_t expectedValue = callFrame->argument(2).toBigInt64(globalObject);

RETURN_IF_EXCEPTION(scope, { });

RELEASE_AND_RETURN(scope, JSValue::encode(atomicsWaitImpl<int64_t>(globalObject, uncheckedDowncast<JSBigInt64Array>(typedArrayView), accessIndex, expectedValue, callFrame->argument(3), AtomicsWaitType::Sync)));

}

default:

RELEASE_ASSERT_NOT_REACHED();

break;

}

return { };

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncWaitAsync, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

auto* typedArrayView = validateIntegerTypedArray<TypedArrayOperationMode::Wait>(globalObject, callFrame->argument(0));

RETURN_IF_EXCEPTION(scope, { });

if (!typedArrayView->isShared())

return throwVMTypeError(globalObject, scope, "Typed array for wait/waitAsync/notify must wrap a SharedArrayBuffer."_s);

uint64_t accessIndex = validateAtomicAccess(globalObject, vm, typedArrayView, callFrame->argument(1));

RETURN_IF_EXCEPTION(scope, { });

switch (typedArrayView->type()) {

case Int32ArrayType: {

int32_t expectedValue = callFrame->argument(2).toInt32(globalObject);

RETURN_IF_EXCEPTION(scope, { });

}

case BigInt64ArrayType: {

int64_t expectedValue = callFrame->argument(2).toBigInt64(globalObject);

RETURN_IF_EXCEPTION(scope, { });

}

default:

RELEASE_ASSERT_NOT_REACHED();

break;

}

return { };

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncPause, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue argument = callFrame->argument(0);

if (!argument.isUndefined()) {

if (!argument.isNumber() || !isInteger(argument.asNumber())) [[unlikely]]

return throwVMTypeError(globalObject, scope, "Atomics.pause argument needs to be either undefined or integer number"_s);

// Right now, argument integer is not used.

}

// Note that we use "isb" for ARM64 instead of "yield".

// https://stackoverflow.com/questions/70810121/why-does-hintspin-loop-use-isb-on-aarch64

simde_mm_pause();

return JSValue::encode(jsUndefined());

}

EncodedJSValue getWaiterListSize(JSGlobalObject* globalObject, CallFrame* callFrame)

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

auto* typedArrayView = validateIntegerTypedArray<TypedArrayOperationMode::Wait>(globalObject, callFrame->argument(0));

RETURN_IF_EXCEPTION(scope, { });

if (!typedArrayView->isShared())

return throwVMTypeError(globalObject, scope, "Typed array for waiterListSize must wrap a SharedArrayBuffer."_s);

uint64_t accessIndex = validateAtomicAccess(globalObject, vm, typedArrayView, callFrame->argument(1));

RETURN_IF_EXCEPTION(scope, { });

switch (typedArrayView->type()) {

case Int32ArrayType: {

auto ptr = uncheckedDowncast<JSInt32Array>(typedArrayView)->typedVector() + accessIndex;

RELEASE_AND_RETURN(scope, JSValue::encode(jsNumber(WaiterListManager::singleton().waiterListSize(ptr))));

}

case BigInt64ArrayType: {

auto ptr = uncheckedDowncast<JSBigInt64Array>(typedArrayView)->typedVector() + accessIndex;

RELEASE_AND_RETURN(scope, JSValue::encode(jsNumber(WaiterListManager::singleton().waiterListSize(ptr))));

}

default:

RELEASE_ASSERT_NOT_REACHED();

break;

}

return JSValue::encode(jsUndefined());

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncNotify, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

VM& vm = globalObject->vm();

auto scope = DECLARE_THROW_SCOPE(vm);

auto* typedArrayView = validateIntegerTypedArray<TypedArrayOperationMode::Wait>(globalObject, callFrame->argument(0));

RETURN_IF_EXCEPTION(scope, { });

uint64_t accessIndex = validateAtomicAccess(globalObject, vm, typedArrayView, callFrame->argument(1));

RETURN_IF_EXCEPTION(scope, { });

JSValue countValue = callFrame->argument(2);

unsigned count = UINT_MAX;

if (!countValue.isUndefined()) {

double countInt = countValue.toIntegerOrInfinity(globalObject);

RETURN_IF_EXCEPTION(scope, { });

double countDouble = std::max(0.0, countInt);

if (countDouble < UINT_MAX)

count = static_cast<unsigned>(countDouble);

}

if (!typedArrayView->isShared())

return JSValue::encode(jsNumber(0));

switch (typedArrayView->type()) {

case Int32ArrayType: {

int32_t* ptr = uncheckedDowncast<JSInt32Array>(typedArrayView)->typedVector() + accessIndex;

return JSValue::encode(jsNumber(WaiterListManager::singleton().notifyWaiter(ptr, count)));

}

case BigInt64ArrayType: {

int64_t* ptr = uncheckedDowncast<JSBigInt64Array>(typedArrayView)->typedVector() + accessIndex;

return JSValue::encode(jsNumber(WaiterListManager::singleton().notifyWaiter(ptr, count)));

}

default:

RELEASE_ASSERT_NOT_REACHED();

break;

}

return { };

}

JSC_DEFINE_HOST_FUNCTION(atomicsFuncXor, (JSGlobalObject* globalObject, CallFrame* callFrame))

{

return atomicReadModifyWrite(globalObject, callFrame, XorFunc());

}

IGNORE_WARNINGS_BEGIN("frame-address")

JSC_DEFINE_JIT_OPERATION(operationAtomicsAdd, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, AddFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsAnd, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, AndFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsCompareExchange, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue expected, EncodedJSValue newValue))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(expected), JSValue::decode(newValue)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, CompareExchangeFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsExchange, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, ExchangeFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsIsLockFree, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue size))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

OPERATION_RETURN(scope, isLockFree(globalObject, JSValue::decode(size)));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsLoad, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, LoadFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsOr, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, OrFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsStore, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

OPERATION_RETURN(scope, atomicStore(globalObject, vm, JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsSub, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, SubFunc()));

}

JSC_DEFINE_JIT_OPERATION(operationAtomicsXor, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue index, EncodedJSValue operand))

{

VM& vm = globalObject->vm();

CallFrame* callFrame = DECLARE_CALL_FRAME(vm);

JITOperationPrologueCallFrameTracer tracer(vm, callFrame);

auto scope = DECLARE_THROW_SCOPE(vm);

JSValue args[] = {JSValue::decode(base), JSValue::decode(index), JSValue::decode(operand)};

OPERATION_RETURN(scope, atomicReadModifyWrite(globalObject, vm, args, XorFunc()));

}

IGNORE_WARNINGS_END

} // namespace JSC

WTF_ALLOW_UNSAFE_BUFFER_USAGE_END

WebKit/Source/JavaScriptCore/runtime/AtomicsObject.cpp at main · WebKit/WebKit · GitHub

Uh oh!

Expand file tree

Breadcrumbs

AtomicsObject.cpp

Latest commit

History

Breadcrumbs

AtomicsObject.cpp

File metadata and controls