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trisquel-icecat/icecat/js/src/vm/SelfHosting.cpp
Ark74 618c9f4145 icecat: add release 140.3.1-1gnu1
2025-10-06 02:35:48 -06:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "vm/SelfHosting.h"
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
# include "builtin/AsyncDisposableStackObject.h"
# include "builtin/DisposableStackObject.h"
#endif
#include "mozilla/BinarySearch.h"
#include "mozilla/Casting.h"
#include "mozilla/Maybe.h"
#include "mozilla/ScopeExit.h" // mozilla::MakeScopeExit
#include "mozilla/Utf8.h" // mozilla::Utf8Unit
#include <algorithm>
#include <iterator>
#include "jsfriendapi.h"
#include "jsmath.h"
#include "jsnum.h"
#include "selfhosted.out.h"
#include "builtin/Array.h"
#include "builtin/BigInt.h"
#ifdef JS_HAS_INTL_API
# include "builtin/intl/Collator.h"
# include "builtin/intl/DateTimeFormat.h"
# include "builtin/intl/DisplayNames.h"
# include "builtin/intl/DurationFormat.h"
# include "builtin/intl/IntlObject.h"
# include "builtin/intl/ListFormat.h"
# include "builtin/intl/Locale.h"
# include "builtin/intl/NumberFormat.h"
# include "builtin/intl/PluralRules.h"
# include "builtin/intl/RelativeTimeFormat.h"
# include "builtin/intl/Segmenter.h"
#endif
#include "builtin/MapObject.h"
#include "builtin/Object.h"
#include "builtin/Promise.h"
#include "builtin/Reflect.h"
#include "builtin/RegExp.h"
#include "builtin/SelfHostingDefines.h"
#include "builtin/String.h"
#ifdef JS_HAS_INTL_API
# include "builtin/temporal/Duration.h"
#endif
#include "builtin/WeakMapObject.h"
#include "frontend/BytecodeCompiler.h" // CompileGlobalScriptToStencil
#include "frontend/CompilationStencil.h" // js::frontend::CompilationStencil
#include "frontend/FrontendContext.h" // AutoReportFrontendContext
#include "frontend/StencilXdr.h" // js::EncodeStencil, js::DecodeStencil
#include "jit/AtomicOperations.h"
#include "jit/BaselineJIT.h"
#include "jit/InlinableNatives.h"
#include "jit/TrampolineNatives.h"
#include "js/CompilationAndEvaluation.h"
#include "js/Conversions.h"
#include "js/ErrorReport.h" // JS::PrintError
#include "js/experimental/JSStencil.h"
#include "js/experimental/TypedData.h" // JS_GetArrayBufferViewType
#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_*
#include "js/HashTable.h"
#include "js/Printer.h"
#include "js/PropertySpec.h"
#include "js/ScalarType.h" // js::Scalar::Type
#include "js/SourceText.h" // JS::SourceText
#include "js/TracingAPI.h"
#include "js/Transcoding.h"
#include "js/Warnings.h" // JS::{,Set}WarningReporter
#include "js/Wrapper.h"
#include "vm/ArgumentsObject.h"
#include "vm/AsyncFunction.h"
#include "vm/AsyncIteration.h"
#include "vm/BigIntType.h"
#include "vm/Compression.h"
#include "vm/DateObject.h"
#include "vm/ErrorReporting.h" // js::MaybePrintAndClearPendingException
#include "vm/Float16.h"
#include "vm/FrameIter.h" // js::ScriptFrameIter
#include "vm/GeneratorObject.h"
#include "vm/Interpreter.h"
#include "vm/Iteration.h"
#include "vm/JSAtomUtils.h" // Atomize
#include "vm/JSContext.h"
#include "vm/JSFunction.h"
#include "vm/JSObject.h"
#include "vm/Logging.h"
#include "vm/PlainObject.h" // js::PlainObject
#include "vm/Realm.h"
#include "vm/RegExpObject.h"
#include "vm/StringType.h"
#include "vm/ToSource.h" // js::ValueToSource
#include "vm/TypedArrayObject.h"
#include "vm/Uint8Clamped.h"
#include "vm/WrapperObject.h"
#include "vm/Compartment-inl.h"
#include "vm/JSAtomUtils-inl.h" // PrimitiveValueToId
#include "vm/JSFunction-inl.h"
#include "vm/JSObject-inl.h"
#include "vm/NativeObject-inl.h"
#include "vm/TypedArrayObject-inl.h"
using namespace js;
using namespace js::selfhosted;
using JS::CompileOptions;
static bool intrinsic_ToObject(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
JSObject* obj = ToObject(cx, args[0]);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
static bool intrinsic_IsObject(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
Value val = args[0];
bool isObject = val.isObject();
args.rval().setBoolean(isObject);
return true;
}
static bool intrinsic_IsArray(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
RootedValue val(cx, args[0]);
if (val.isObject()) {
RootedObject obj(cx, &val.toObject());
bool isArray = false;
if (!IsArray(cx, obj, &isArray)) {
return false;
}
args.rval().setBoolean(isArray);
} else {
args.rval().setBoolean(false);
}
return true;
}
static bool intrinsic_IsCrossRealmArrayConstructor(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
bool result = false;
if (!IsCrossRealmArrayConstructor(cx, &args[0].toObject(), &result)) {
return false;
}
args.rval().setBoolean(result);
return true;
}
static bool intrinsic_ToLength(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
// Inline fast path for the common case.
if (args[0].isInt32()) {
int32_t i = args[0].toInt32();
args.rval().setInt32(i < 0 ? 0 : i);
return true;
}
uint64_t length = 0;
if (!ToLength(cx, args[0], &length)) {
return false;
}
args.rval().setNumber(double(length));
return true;
}
static bool intrinsic_ToInteger(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
double result;
if (!ToInteger(cx, args[0], &result)) {
return false;
}
args.rval().setNumber(result);
return true;
}
static bool intrinsic_ToSource(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
JSString* str = ValueToSource(cx, args[0]);
if (!str) {
return false;
}
args.rval().setString(str);
return true;
}
static bool intrinsic_ToPropertyKey(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
RootedId id(cx);
if (!ToPropertyKey(cx, args[0], &id)) {
return false;
}
args.rval().set(IdToValue(id));
return true;
}
static bool intrinsic_IsCallable(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setBoolean(IsCallable(args[0]));
return true;
}
static bool intrinsic_IsConstructor(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
args.rval().setBoolean(IsConstructor(args[0]));
return true;
}
template <typename T>
static bool intrinsic_IsInstanceOfBuiltin(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
args.rval().setBoolean(args[0].toObject().is<T>());
return true;
}
template <typename T>
static bool intrinsic_GuardToBuiltin(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
if (args[0].toObject().is<T>()) {
args.rval().setObject(args[0].toObject());
return true;
}
args.rval().setNull();
return true;
}
template <typename T>
static bool intrinsic_IsWrappedInstanceOfBuiltin(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
JSObject* obj = &args[0].toObject();
if (!obj->is<WrapperObject>()) {
args.rval().setBoolean(false);
return true;
}
JSObject* unwrapped = CheckedUnwrapDynamic(obj, cx);
if (!unwrapped) {
ReportAccessDenied(cx);
return false;
}
args.rval().setBoolean(unwrapped->is<T>());
return true;
}
template <typename T>
static bool intrinsic_IsPossiblyWrappedInstanceOfBuiltin(JSContext* cx,
unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
JSObject* obj = CheckedUnwrapDynamic(&args[0].toObject(), cx);
if (!obj) {
ReportAccessDenied(cx);
return false;
}
args.rval().setBoolean(obj->is<T>());
return true;
}
static bool intrinsic_SubstringKernel(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args[0].isString());
MOZ_RELEASE_ASSERT(args[1].isInt32());
MOZ_RELEASE_ASSERT(args[2].isInt32());
RootedString str(cx, args[0].toString());
int32_t begin = args[1].toInt32();
int32_t length = args[2].toInt32();
JSString* substr = SubstringKernel(cx, str, begin, length);
if (!substr) {
return false;
}
args.rval().setString(substr);
return true;
}
static bool intrinsic_CanOptimizeStringProtoSymbolLookup(JSContext* cx,
unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
bool optimizable =
cx->realm()->realmFuses.optimizeStringPrototypeSymbolsFuse.intact();
args.rval().setBoolean(optimizable);
return true;
}
static void ThrowErrorWithType(JSContext* cx, JSExnType type,
const CallArgs& args) {
MOZ_RELEASE_ASSERT(args[0].isInt32());
uint32_t errorNumber = args[0].toInt32();
#ifdef DEBUG
const JSErrorFormatString* efs = GetErrorMessage(nullptr, errorNumber);
MOZ_ASSERT(efs->argCount == args.length() - 1);
MOZ_ASSERT(efs->exnType == type,
"error-throwing intrinsic and error number are inconsistent");
#endif
UniqueChars errorArgs[3];
for (unsigned i = 1; i < 4 && i < args.length(); i++) {
HandleValue val = args[i];
if (val.isInt32() || val.isString()) {
JSString* str = ToString<CanGC>(cx, val);
if (!str) {
return;
}
errorArgs[i - 1] = QuoteString(cx, str);
} else {
errorArgs[i - 1] =
DecompileValueGenerator(cx, JSDVG_SEARCH_STACK, val, nullptr);
}
if (!errorArgs[i - 1]) {
return;
}
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, errorNumber,
errorArgs[0].get(), errorArgs[1].get(),
errorArgs[2].get());
}
static bool intrinsic_ThrowRangeError(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() >= 1);
ThrowErrorWithType(cx, JSEXN_RANGEERR, args);
return false;
}
static bool intrinsic_ThrowTypeError(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() >= 1);
ThrowErrorWithType(cx, JSEXN_TYPEERR, args);
return false;
}
static bool intrinsic_ThrowAggregateError(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() >= 1);
ThrowErrorWithType(cx, JSEXN_AGGREGATEERR, args);
return false;
}
static bool intrinsic_ThrowInternalError(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() >= 1);
ThrowErrorWithType(cx, JSEXN_INTERNALERR, args);
return false;
}
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
static bool intrinsic_CreateSuppressedError(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
JS::Rooted<JS::Value> error(cx, args[0]);
JS::Rooted<JS::Value> suppressed(cx, args[1]);
ErrorObject* suppressedError = CreateSuppressedError(cx, error, suppressed);
if (!suppressedError) {
return false;
}
args.rval().setObject(*suppressedError);
return true;
}
#endif
/**
* Handles an assertion failure in self-hosted code just like an assertion
* failure in C++ code. Information about the failure can be provided in
* args[0].
*/
static bool intrinsic_AssertionFailed(JSContext* cx, unsigned argc, Value* vp) {
#ifdef DEBUG
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 0) {
// try to dump the informative string
JSString* str = ToString<CanGC>(cx, args[0]);
if (str) {
js::Fprinter out(stderr);
out.put("Self-hosted JavaScript assertion info: ");
str->dumpCharsNoQuote(out);
out.putChar('\n');
}
}
#endif
MOZ_ASSERT(false);
return false;
}
/**
* Dumps a message to stderr, after stringifying it. Doesn't append a newline.
*/
static bool intrinsic_DumpMessage(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
#ifdef DEBUG
if (args.length() > 0) {
// try to dump the informative string
js::Fprinter out(stderr);
JSString* str = ToString<CanGC>(cx, args[0]);
if (str) {
str->dumpCharsNoQuote(out);
out.putChar('\n');
} else {
cx->recoverFromOutOfMemory();
}
}
#endif
args.rval().setUndefined();
return true;
}
/*
* Used to decompile values in the nearest non-builtin stack frame, falling
* back to decompiling in the current frame. Helpful for printing higher-order
* function arguments.
*
* The user must supply the argument number of the value in question; it
* _cannot_ be automatically determined.
*/
static bool intrinsic_DecompileArg(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_RELEASE_ASSERT(args[0].isInt32());
HandleValue value = args[1];
JSString* str = DecompileArgument(cx, args[0].toInt32(), value);
if (!str) {
return false;
}
args.rval().setString(str);
return true;
}
static bool intrinsic_DefineDataProperty(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// When DefineDataProperty is called with 3 arguments, it's compiled to
// JSOp::InitElem in the bytecode emitter so we shouldn't get here.
MOZ_ASSERT(args.length() == 4);
MOZ_ASSERT(args[0].isObject());
MOZ_RELEASE_ASSERT(args[3].isInt32());
RootedObject obj(cx, &args[0].toObject());
RootedId id(cx);
if (!ToPropertyKey(cx, args[1], &id)) {
return false;
}
RootedValue value(cx, args[2]);
JS::PropertyAttributes attrs;
unsigned attributes = args[3].toInt32();
MOZ_ASSERT(bool(attributes & ATTR_ENUMERABLE) !=
bool(attributes & ATTR_NONENUMERABLE),
"DefineDataProperty must receive either ATTR_ENUMERABLE xor "
"ATTR_NONENUMERABLE");
if (attributes & ATTR_ENUMERABLE) {
attrs += JS::PropertyAttribute::Enumerable;
}
MOZ_ASSERT(bool(attributes & ATTR_CONFIGURABLE) !=
bool(attributes & ATTR_NONCONFIGURABLE),
"DefineDataProperty must receive either ATTR_CONFIGURABLE xor "
"ATTR_NONCONFIGURABLE");
if (attributes & ATTR_CONFIGURABLE) {
attrs += JS::PropertyAttribute::Configurable;
}
MOZ_ASSERT(
bool(attributes & ATTR_WRITABLE) != bool(attributes & ATTR_NONWRITABLE),
"DefineDataProperty must receive either ATTR_WRITABLE xor "
"ATTR_NONWRITABLE");
if (attributes & ATTR_WRITABLE) {
attrs += JS::PropertyAttribute::Writable;
}
Rooted<PropertyDescriptor> desc(cx, PropertyDescriptor::Data(value, attrs));
if (!DefineProperty(cx, obj, id, desc)) {
return false;
}
args.rval().setUndefined();
return true;
}
static bool intrinsic_DefineProperty(JSContext* cx, unsigned argc, Value* vp) {
// _DefineProperty(object, propertyKey, attributes,
// valueOrGetter, setter, strict)
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 6);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[1].isString() || args[1].isNumber() || args[1].isSymbol());
MOZ_RELEASE_ASSERT(args[2].isInt32());
MOZ_ASSERT(args[5].isBoolean());
RootedObject obj(cx, &args[0].toObject());
RootedId id(cx);
if (!PrimitiveValueToId<CanGC>(cx, args[1], &id)) {
return false;
}
Rooted<PropertyDescriptor> desc(cx, PropertyDescriptor::Empty());
unsigned attributes = args[2].toInt32();
if (attributes & (ATTR_ENUMERABLE | ATTR_NONENUMERABLE)) {
desc.setEnumerable(attributes & ATTR_ENUMERABLE);
}
if (attributes & (ATTR_CONFIGURABLE | ATTR_NONCONFIGURABLE)) {
desc.setConfigurable(attributes & ATTR_CONFIGURABLE);
}
if (attributes & (ATTR_WRITABLE | ATTR_NONWRITABLE)) {
desc.setWritable(attributes & ATTR_WRITABLE);
}
// When args[4] is |null|, the data descriptor has a value component.
if ((attributes & DATA_DESCRIPTOR_KIND) && args[4].isNull()) {
desc.setValue(args[3]);
}
if (attributes & ACCESSOR_DESCRIPTOR_KIND) {
Value getter = args[3];
if (getter.isObject()) {
desc.setGetter(&getter.toObject());
} else if (getter.isUndefined()) {
desc.setGetter(nullptr);
} else {
MOZ_ASSERT(getter.isNull());
}
Value setter = args[4];
if (setter.isObject()) {
desc.setSetter(&setter.toObject());
} else if (setter.isUndefined()) {
desc.setSetter(nullptr);
} else {
MOZ_ASSERT(setter.isNull());
}
}
desc.assertValid();
ObjectOpResult result;
if (!DefineProperty(cx, obj, id, desc, result)) {
return false;
}
bool strict = args[5].toBoolean();
if (strict && !result.ok()) {
// We need to tell our caller Object.defineProperty,
// that this operation failed, without actually throwing
// for web-compatibility reasons.
if (result.failureCode() == JSMSG_CANT_DEFINE_WINDOW_NC) {
args.rval().setBoolean(false);
return true;
}
return result.reportError(cx, obj, id);
}
args.rval().setBoolean(result.ok());
return true;
}
static bool intrinsic_UnsafeSetReservedSlot(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 3);
MOZ_ASSERT(args[0].isObject());
MOZ_RELEASE_ASSERT(args[1].isInt32());
MOZ_ASSERT(args[1].toInt32() >= 0);
uint32_t slot = uint32_t(args[1].toInt32());
args[0].toObject().as<NativeObject>().setReservedSlot(slot, args[2]);
args.rval().setUndefined();
return true;
}
static bool intrinsic_UnsafeGetReservedSlot(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].isObject());
MOZ_RELEASE_ASSERT(args[1].isInt32());
MOZ_ASSERT(args[1].toInt32() >= 0);
uint32_t slot = uint32_t(args[1].toInt32());
args.rval().set(args[0].toObject().as<NativeObject>().getReservedSlot(slot));
return true;
}
static bool intrinsic_UnsafeGetObjectFromReservedSlot(JSContext* cx,
unsigned argc,
Value* vp) {
if (!intrinsic_UnsafeGetReservedSlot(cx, argc, vp)) {
return false;
}
MOZ_ASSERT(vp->isObject());
return true;
}
static bool intrinsic_UnsafeGetInt32FromReservedSlot(JSContext* cx,
unsigned argc, Value* vp) {
if (!intrinsic_UnsafeGetReservedSlot(cx, argc, vp)) {
return false;
}
MOZ_ASSERT(vp->isInt32());
return true;
}
static bool intrinsic_UnsafeGetStringFromReservedSlot(JSContext* cx,
unsigned argc,
Value* vp) {
if (!intrinsic_UnsafeGetReservedSlot(cx, argc, vp)) {
return false;
}
MOZ_ASSERT(vp->isString());
return true;
}
static bool intrinsic_ThisTimeValue(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isInt32());
const char* name = nullptr;
int32_t method = args[0].toInt32();
if (method == DATE_METHOD_LOCALE_TIME_STRING) {
name = "toLocaleTimeString";
} else if (method == DATE_METHOD_LOCALE_DATE_STRING) {
name = "toLocaleDateString";
} else {
MOZ_ASSERT(method == DATE_METHOD_LOCALE_STRING);
name = "toLocaleString";
}
auto* unwrapped = UnwrapAndTypeCheckThis<DateObject>(cx, args, name);
if (!unwrapped) {
return false;
}
args.rval().set(unwrapped->UTCTime());
return true;
}
static bool intrinsic_IsPackedArray(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
args.rval().setBoolean(IsPackedArray(&args[0].toObject()));
return true;
}
bool js::intrinsic_NewArrayIterator(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewArrayIterator(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
static bool intrinsic_ArrayIteratorPrototypeOptimizable(JSContext* cx,
unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
bool optimized = HasOptimizableArrayIteratorPrototype(cx);
args.rval().setBoolean(optimized);
return true;
}
static bool intrinsic_GetNextMapEntryForIterator(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].toObject().is<MapIteratorObject>());
MOZ_ASSERT(args[1].isObject());
MapIteratorObject* mapIterator = &args[0].toObject().as<MapIteratorObject>();
ArrayObject* result = &args[1].toObject().as<ArrayObject>();
args.rval().setBoolean(MapIteratorObject::next(mapIterator, result));
return true;
}
static bool intrinsic_CreateMapIterationResultPair(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* result = MapIteratorObject::createResultPair(cx);
if (!result) {
return false;
}
args.rval().setObject(*result);
return true;
}
static bool intrinsic_GetNextSetEntryForIterator(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].toObject().is<SetIteratorObject>());
MOZ_ASSERT(args[1].isObject());
SetIteratorObject* setIterator = &args[0].toObject().as<SetIteratorObject>();
ArrayObject* result = &args[1].toObject().as<ArrayObject>();
args.rval().setBoolean(SetIteratorObject::next(setIterator, result));
return true;
}
static bool intrinsic_CreateSetIterationResult(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* result = SetIteratorObject::createResult(cx);
if (!result) {
return false;
}
args.rval().setObject(*result);
return true;
}
bool js::intrinsic_NewStringIterator(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewStringIterator(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
bool js::intrinsic_NewRegExpStringIterator(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewRegExpStringIterator(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
js::PropertyName* js::GetClonedSelfHostedFunctionName(const JSFunction* fun) {
if (!fun->isExtended()) {
return nullptr;
}
Value name = fun->getExtendedSlot(LAZY_FUNCTION_NAME_SLOT);
if (!name.isString()) {
return nullptr;
}
return name.toString()->asAtom().asPropertyName();
}
bool js::IsExtendedUnclonedSelfHostedFunctionName(JSAtom* name) {
if (name->length() < 2) {
return false;
}
return name->latin1OrTwoByteChar(0) ==
ExtendedUnclonedSelfHostedFunctionNamePrefix;
}
void js::SetClonedSelfHostedFunctionName(JSFunction* fun,
js::PropertyName* name) {
fun->setExtendedSlot(LAZY_FUNCTION_NAME_SLOT, StringValue(name));
}
static bool intrinsic_GeneratorObjectIsClosed(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
GeneratorObject* genObj = &args[0].toObject().as<GeneratorObject>();
args.rval().setBoolean(genObj->isClosed());
return true;
}
static bool intrinsic_IsSuspendedGenerator(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
if (!args[0].isObject() || !args[0].toObject().is<GeneratorObject>()) {
args.rval().setBoolean(false);
return true;
}
GeneratorObject& genObj = args[0].toObject().as<GeneratorObject>();
args.rval().setBoolean(!genObj.isClosed() && genObj.isSuspended());
return true;
}
static bool intrinsic_GeneratorIsRunning(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
GeneratorObject* genObj = &args[0].toObject().as<GeneratorObject>();
args.rval().setBoolean(genObj->isRunning());
return true;
}
static bool intrinsic_GeneratorSetClosed(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
GeneratorObject* genObj = &args[0].toObject().as<GeneratorObject>();
genObj->setClosed(cx);
return true;
}
static void AssertNonNegativeInteger(const Value& v) {
MOZ_ASSERT(v.isNumber());
MOZ_ASSERT(v.toNumber() >= 0);
MOZ_ASSERT(v.toNumber() < DOUBLE_INTEGRAL_PRECISION_LIMIT);
MOZ_ASSERT(JS::ToInteger(v.toNumber()) == v.toNumber());
}
static bool intrinsic_IsTypedArrayConstructor(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
args.rval().setBoolean(js::IsTypedArrayConstructor(&args[0].toObject()));
return true;
}
static bool intrinsic_TypedArrayBuffer(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].toObject().is<TypedArrayObject>());
Rooted<TypedArrayObject*> tarray(cx,
&args[0].toObject().as<TypedArrayObject>());
if (!TypedArrayObject::ensureHasBuffer(cx, tarray)) {
return false;
}
args.rval().set(tarray->bufferValue());
return true;
}
static bool intrinsic_TypedArrayByteOffset(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].toObject().is<TypedArrayObject>());
auto* tarr = &args[0].toObject().as<TypedArrayObject>();
args.rval().setNumber(tarr->byteOffsetMaybeOutOfBounds());
return true;
}
static bool intrinsic_TypedArrayElementSize(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].toObject().is<TypedArrayObject>());
unsigned size =
TypedArrayElemSize(args[0].toObject().as<TypedArrayObject>().type());
MOZ_ASSERT(size == 1 || size == 2 || size == 4 || size == 8);
args.rval().setInt32(mozilla::AssertedCast<int32_t>(size));
return true;
}
// Return the value of [[ArrayLength]] internal slot of the TypedArray
static bool intrinsic_TypedArrayLength(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].toObject().is<TypedArrayObject>());
auto* tarr = &args[0].toObject().as<TypedArrayObject>();
mozilla::Maybe<size_t> length = tarr->length();
if (!length) {
// Return zero for detached buffers to match JIT code.
if (tarr->hasDetachedBuffer()) {
args.rval().setInt32(0);
return true;
}
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_TYPED_ARRAY_RESIZED_BOUNDS);
return false;
}
args.rval().setNumber(*length);
return true;
}
// Return the value of [[ArrayLength]] internal slot of the TypedArray. If the
// length is out-of-bounds, always return zero.
static bool intrinsic_TypedArrayLengthZeroOnOutOfBounds(JSContext* cx,
unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].toObject().is<TypedArrayObject>());
auto* tarr = &args[0].toObject().as<TypedArrayObject>();
args.rval().setNumber(tarr->length().valueOr(0));
return true;
}
static bool intrinsic_PossiblyWrappedTypedArrayLength(JSContext* cx,
unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
TypedArrayObject* obj = args[0].toObject().maybeUnwrapAs<TypedArrayObject>();
if (!obj) {
ReportAccessDenied(cx);
return false;
}
mozilla::Maybe<size_t> length = obj->length();
if (!length) {
// Return zero for detached buffers to match JIT code.
if (obj->hasDetachedBuffer()) {
args.rval().setInt32(0);
return true;
}
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_TYPED_ARRAY_RESIZED_BOUNDS);
return false;
}
args.rval().setNumber(*length);
return true;
}
static bool intrinsic_PossiblyWrappedTypedArrayHasDetachedBuffer(JSContext* cx,
unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
TypedArrayObject* obj = args[0].toObject().maybeUnwrapAs<TypedArrayObject>();
if (!obj) {
ReportAccessDenied(cx);
return false;
}
bool detached = obj->hasDetachedBuffer();
args.rval().setBoolean(detached);
return true;
}
static bool intrinsic_TypedArrayIsAutoLength(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].toObject().is<TypedArrayObject>());
JSObject* obj = &args[0].toObject();
bool isAutoLength = obj->is<ResizableTypedArrayObject>() &&
obj->as<ResizableTypedArrayObject>().isAutoLength();
args.rval().setBoolean(isAutoLength);
return true;
}
// Extract the TypedArrayObject* underlying |obj| and return it. This method,
// in a TOTALLY UNSAFE manner, completely violates the normal compartment
// boundaries, returning an object not necessarily in the current compartment
// or in |obj|'s compartment.
//
// All callers of this method are expected to sigil this TypedArrayObject*, and
// all values and information derived from it, with an "unsafe" prefix, to
// indicate the extreme caution required when dealing with such values.
//
// If calling code discipline ever fails to be maintained, it's gonna have a
// bad time.
static TypedArrayObject* DangerouslyUnwrapTypedArray(JSContext* cx,
JSObject* obj) {
// An unwrapped pointer to an object potentially on the other side of a
// compartment boundary! Isn't this such fun?
TypedArrayObject* unwrapped = obj->maybeUnwrapAs<TypedArrayObject>();
if (!unwrapped) {
ReportAccessDenied(cx);
return nullptr;
}
// Be super-duper careful using this, as we've just punched through
// the compartment boundary, and things like buffer() on this aren't
// same-compartment with anything else in the calling method.
return unwrapped;
}
static bool intrinsic_TypedArrayBitwiseSlice(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 4);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[1].isObject());
AssertNonNegativeInteger(args[2]);
AssertNonNegativeInteger(args[3]);
Rooted<TypedArrayObject*> source(cx,
&args[0].toObject().as<TypedArrayObject>());
auto sourceLength = source->length();
if (!sourceLength) {
if (source->hasDetachedBuffer()) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_TYPED_ARRAY_DETACHED);
} else {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_TYPED_ARRAY_RESIZED_BOUNDS);
}
return false;
}
MOZ_ASSERT(!source->hasDetachedBuffer());
// As directed by |DangerouslyUnwrapTypedArray|, sigil this pointer and all
// variables derived from it to counsel extreme caution here.
Rooted<TypedArrayObject*> unsafeTypedArrayCrossCompartment(cx);
unsafeTypedArrayCrossCompartment =
DangerouslyUnwrapTypedArray(cx, &args[1].toObject());
if (!unsafeTypedArrayCrossCompartment) {
return false;
}
MOZ_ASSERT(!unsafeTypedArrayCrossCompartment->hasDetachedBuffer());
// The specification requires us to perform bitwise copying when |sourceType|
// and |targetType| are the same (ES2017, §22.2.3.24, step 15). Additionally,
// as an optimization, we can also perform bitwise copying when |sourceType|
// and |targetType| have compatible bit-level representations.
Scalar::Type sourceType = source->type();
if (!CanUseBitwiseCopy(unsafeTypedArrayCrossCompartment->type(),
sourceType)) {
args.rval().setBoolean(false);
return true;
}
size_t sourceOffset = size_t(args[2].toNumber());
size_t count = size_t(args[3].toNumber());
MOZ_ASSERT(count > 0);
MOZ_ASSERT(count <= unsafeTypedArrayCrossCompartment->length().valueOr(0));
size_t elementSize = TypedArrayElemSize(sourceType);
MOZ_ASSERT(elementSize ==
TypedArrayElemSize(unsafeTypedArrayCrossCompartment->type()));
SharedMem<uint8_t*> sourceData =
source->dataPointerEither().cast<uint8_t*>() + sourceOffset * elementSize;
SharedMem<uint8_t*> unsafeTargetDataCrossCompartment =
unsafeTypedArrayCrossCompartment->dataPointerEither().cast<uint8_t*>();
size_t byteLength = std::min(count, *sourceLength) * elementSize;
// The same-type case requires exact copying preserving the bit-level
// encoding of the source data, so use memcpy if possible. If source and
// target are the same buffer, we can't use memcpy (or memmove), because
// the specification requires sequential copying of the values. This case
// is only possible if a @@species constructor created a specifically
// crafted typed array. It won't happen in normal code and hence doesn't
// need to be optimized.
if (!TypedArrayObject::sameBuffer(source, unsafeTypedArrayCrossCompartment)) {
if (source->isSharedMemory() ||
unsafeTypedArrayCrossCompartment->isSharedMemory()) {
jit::AtomicOperations::memcpySafeWhenRacy(
unsafeTargetDataCrossCompartment, sourceData, byteLength);
} else {
memcpy(unsafeTargetDataCrossCompartment.unwrapUnshared(),
sourceData.unwrapUnshared(), byteLength);
}
} else {
using namespace jit;
for (; byteLength > 0; byteLength--) {
AtomicOperations::storeSafeWhenRacy(
unsafeTargetDataCrossCompartment++,
AtomicOperations::loadSafeWhenRacy(sourceData++));
}
}
args.rval().setBoolean(true);
return true;
}
static bool intrinsic_TypedArrayInitFromPackedArray(JSContext* cx,
unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[1].isObject());
Rooted<FixedLengthTypedArrayObject*> target(
cx, &args[0].toObject().as<FixedLengthTypedArrayObject>());
MOZ_ASSERT(!target->hasDetachedBuffer());
MOZ_ASSERT(!target->isSharedMemory());
Rooted<ArrayObject*> source(cx, &args[1].toObject().as<ArrayObject>());
MOZ_ASSERT(IsPackedArray(source));
MOZ_ASSERT(source->length() == target->length());
switch (target->type()) {
#define INIT_TYPED_ARRAY(_, T, N) \
case Scalar::N: { \
if (!ElementSpecific<T, UnsharedOps>::initFromIterablePackedArray( \
cx, target, source)) { \
return false; \
} \
break; \
}
JS_FOR_EACH_TYPED_ARRAY(INIT_TYPED_ARRAY)
#undef INIT_TYPED_ARRAY
default:
MOZ_CRASH(
"TypedArrayInitFromPackedArray with a typed array with bogus type");
}
args.rval().setUndefined();
return true;
}
template <bool ForTest>
static bool intrinsic_RegExpBuiltinExec(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[0].toObject().is<RegExpObject>());
MOZ_ASSERT(args[1].isString());
Rooted<RegExpObject*> obj(cx, &args[0].toObject().as<RegExpObject>());
Rooted<JSString*> string(cx, args[1].toString());
return RegExpBuiltinExec(cx, obj, string, ForTest, args.rval());
}
template <bool ForTest>
static bool intrinsic_RegExpExec(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[1].isString());
Rooted<JSObject*> obj(cx, &args[0].toObject());
Rooted<JSString*> string(cx, args[1].toString());
return RegExpExec(cx, obj, string, ForTest, args.rval());
}
static bool intrinsic_RegExpCreate(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1 || args.length() == 2);
MOZ_ASSERT_IF(args.length() == 2,
args[1].isString() || args[1].isUndefined());
MOZ_ASSERT(!args.isConstructing());
return RegExpCreate(cx, args[0], args.get(1), args.rval());
}
static bool intrinsic_RegExpGetSubstitution(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 6);
Rooted<ArrayObject*> matchResult(cx, &args[0].toObject().as<ArrayObject>());
Rooted<JSLinearString*> string(cx, args[1].toString()->ensureLinear(cx));
if (!string) {
return false;
}
int32_t position = int32_t(args[2].toNumber());
MOZ_ASSERT(position >= 0);
Rooted<JSLinearString*> replacement(cx, args[3].toString()->ensureLinear(cx));
if (!replacement) {
return false;
}
int32_t firstDollarIndex = int32_t(args[4].toNumber());
MOZ_ASSERT(firstDollarIndex >= 0);
RootedValue namedCaptures(cx, args[5]);
MOZ_ASSERT(namedCaptures.isUndefined() || namedCaptures.isObject());
return RegExpGetSubstitution(cx, matchResult, string, size_t(position),
replacement, size_t(firstDollarIndex),
namedCaptures, args.rval());
}
static bool intrinsic_RegExpHasCaptureGroups(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[1].isString());
Rooted<RegExpObject*> obj(cx, &args[0].toObject().as<RegExpObject>());
Rooted<JSString*> string(cx, args[1].toString());
bool result;
if (!RegExpHasCaptureGroups(cx, obj, string, &result)) {
return false;
}
args.rval().setBoolean(result);
return true;
}
static bool intrinsic_StringReplaceString(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 3);
RootedString string(cx, args[0].toString());
RootedString pattern(cx, args[1].toString());
RootedString replacement(cx, args[2].toString());
JSString* result = str_replace_string_raw(cx, string, pattern, replacement);
if (!result) {
return false;
}
args.rval().setString(result);
return true;
}
static bool intrinsic_RegExpSymbolProtocolOnPrimitiveCounter(JSContext* cx,
unsigned argc,
Value* vp) {
// This telemetry is to assess compatibility for tc39/ecma262#3009 and
// can later be removed (Bug 1953619).
cx->runtime()->setUseCounter(
cx->global(), JSUseCounter::REGEXP_SYMBOL_PROTOCOL_ON_PRIMITIVE);
return true;
}
static bool intrinsic_StringReplaceAllString(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 3);
RootedString string(cx, args[0].toString());
RootedString pattern(cx, args[1].toString());
RootedString replacement(cx, args[2].toString());
JSString* result =
str_replaceAll_string_raw(cx, string, pattern, replacement);
if (!result) {
return false;
}
args.rval().setString(result);
return true;
}
static bool intrinsic_StringSplitString(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
RootedString string(cx, args[0].toString());
RootedString sep(cx, args[1].toString());
JSObject* aobj = StringSplitString(cx, string, sep, INT32_MAX);
if (!aobj) {
return false;
}
args.rval().setObject(*aobj);
return true;
}
static bool intrinsic_StringSplitStringLimit(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 3);
RootedString string(cx, args[0].toString());
RootedString sep(cx, args[1].toString());
// args[2] should be already in UInt32 range, but it could be double typed,
// because of Ion optimization.
uint32_t limit = uint32_t(args[2].toNumber());
MOZ_ASSERT(limit > 0,
"Zero limit case is already handled in self-hosted code.");
JSObject* aobj = StringSplitString(cx, string, sep, limit);
if (!aobj) {
return false;
}
args.rval().setObject(*aobj);
return true;
}
bool CallSelfHostedNonGenericMethod(JSContext* cx, const CallArgs& args) {
// This function is called when a self-hosted method is invoked on a
// wrapper object, like a CrossCompartmentWrapper. The last argument is
// the name of the self-hosted function. The other arguments are the
// arguments to pass to this function.
MOZ_ASSERT(args.length() > 0);
Rooted<PropertyName*> name(
cx, args[args.length() - 1].toString()->asAtom().asPropertyName());
InvokeArgs args2(cx);
if (!args2.init(cx, args.length() - 1)) {
return false;
}
for (size_t i = 0; i < args.length() - 1; i++) {
args2[i].set(args[i]);
}
return CallSelfHostedFunction(cx, name, args.thisv(), args2, args.rval());
}
#ifdef DEBUG
bool js::CallSelfHostedFunction(JSContext* cx, const char* name,
HandleValue thisv, const AnyInvokeArgs& args,
MutableHandleValue rval) {
JSAtom* funAtom = Atomize(cx, name, strlen(name));
if (!funAtom) {
return false;
}
Rooted<PropertyName*> funName(cx, funAtom->asPropertyName());
return CallSelfHostedFunction(cx, funName, thisv, args, rval);
}
#endif
bool js::CallSelfHostedFunction(JSContext* cx, Handle<PropertyName*> name,
HandleValue thisv, const AnyInvokeArgs& args,
MutableHandleValue rval) {
RootedValue fun(cx);
if (!GlobalObject::getIntrinsicValue(cx, cx->global(), name, &fun)) {
return false;
}
MOZ_ASSERT(fun.toObject().is<JSFunction>());
return Call(cx, fun, thisv, args, rval);
}
template <typename T>
bool Is(HandleValue v) {
return v.isObject() && v.toObject().is<T>();
}
template <IsAcceptableThis Test>
static bool CallNonGenericSelfhostedMethod(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<Test, CallSelfHostedNonGenericMethod>(cx, args);
}
bool js::IsCallSelfHostedNonGenericMethod(NativeImpl impl) {
return impl == CallSelfHostedNonGenericMethod;
}
bool js::ReportIncompatibleSelfHostedMethod(JSContext* cx,
Handle<Value> thisValue) {
// The contract for this function is the same as
// CallSelfHostedNonGenericMethod. The normal ReportIncompatible function
// doesn't work for selfhosted functions, because they always call the
// different CallXXXMethodIfWrapped methods, which would be reported as the
// called function instead.
// Lookup the selfhosted method that was invoked. But skip over
// internal self-hosted function frames, because those are never the
// actual self-hosted callee from external code. We can't just skip
// self-hosted things until we find a non-self-hosted one because of cases
// like array.sort(somethingSelfHosted), where we want to report the error
// in the somethingSelfHosted, not in the sort() call.
static const char* const internalNames[] = {
"EnsureTypedArrayWithArrayBuffer",
"RegExpSearchSlowPath",
"RegExpReplaceSlowPath",
"RegExpMatchSlowPath",
};
ScriptFrameIter iter(cx);
MOZ_ASSERT(iter.isFunctionFrame());
while (!iter.done()) {
MOZ_ASSERT(iter.callee(cx)->isSelfHostedOrIntrinsic());
UniqueChars funNameBytes;
const char* funName =
GetFunctionNameBytes(cx, iter.callee(cx), &funNameBytes);
if (!funName) {
return false;
}
if (std::all_of(
std::begin(internalNames), std::end(internalNames),
[funName](auto* name) { return strcmp(funName, name) != 0; })) {
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_INCOMPATIBLE_METHOD, funName, "method",
InformalValueTypeName(thisValue));
return false;
}
++iter;
}
MOZ_ASSERT_UNREACHABLE("How did we not find a useful self-hosted frame?");
return false;
}
#ifdef JS_HAS_INTL_API
/**
* Returns the default locale as a well-formed, but not necessarily
* canonicalized, BCP-47 language tag.
*/
static bool intrinsic_RuntimeDefaultLocale(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
const char* locale = cx->realm()->getLocale();
if (!locale) {
return false;
}
JSString* jslocale = NewStringCopyZ<CanGC>(cx, locale);
if (!jslocale) {
return false;
}
args.rval().setString(jslocale);
return true;
}
static bool intrinsic_IsRuntimeDefaultLocale(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isString() || args[0].isUndefined());
// |undefined| is the default value when the Intl runtime caches haven't
// yet been initialized. Handle it the same way as a cache miss.
if (args[0].isUndefined()) {
args.rval().setBoolean(false);
return true;
}
const char* locale = cx->realm()->getLocale();
if (!locale) {
return false;
}
JSLinearString* str = args[0].toString()->ensureLinear(cx);
if (!str) {
return false;
}
bool equals = StringEqualsAscii(str, locale);
args.rval().setBoolean(equals);
return true;
}
#endif // JS_HAS_INTL_API
static bool intrinsic_ConstructFunction(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 3);
MOZ_ASSERT(IsConstructor(args[0]));
MOZ_ASSERT(IsConstructor(args[1]));
MOZ_ASSERT(args[2].toObject().is<ArrayObject>());
Rooted<ArrayObject*> argsList(cx, &args[2].toObject().as<ArrayObject>());
uint32_t len = argsList->length();
ConstructArgs constructArgs(cx);
if (!constructArgs.init(cx, len)) {
return false;
}
for (uint32_t index = 0; index < len; index++) {
constructArgs[index].set(argsList->getDenseElement(index));
}
RootedObject res(cx);
if (!Construct(cx, args[0], constructArgs, args[1], &res)) {
return false;
}
args.rval().setObject(*res);
return true;
}
static bool intrinsic_IsConstructing(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
ScriptFrameIter iter(cx);
bool isConstructing = iter.isConstructing();
args.rval().setBoolean(isConstructing);
return true;
}
static bool intrinsic_ConstructorForTypedArray(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isObject());
auto* object = UnwrapAndDowncastValue<TypedArrayObject>(cx, args[0]);
if (!object) {
return false;
}
JSProtoKey protoKey = StandardProtoKeyOrNull(object);
MOZ_ASSERT(protoKey);
// While it may seem like an invariant that in any compartment,
// seeing a typed array object implies that the TypedArray constructor
// for that type is initialized on the compartment's global, this is not
// the case. When we construct a typed array given a cross-compartment
// ArrayBuffer, we put the constructed TypedArray in the same compartment
// as the ArrayBuffer. Since we use the prototype from the initial
// compartment, and never call the constructor in the ArrayBuffer's
// compartment from script, we are not guaranteed to have initialized
// the constructor.
JSObject* ctor = GlobalObject::getOrCreateConstructor(cx, protoKey);
if (!ctor) {
return false;
}
args.rval().setObject(*ctor);
return true;
}
static bool intrinsic_PromiseResolve(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
RootedObject constructor(cx, &args[0].toObject());
JSObject* promise = js::PromiseResolve(cx, constructor, args[1]);
if (!promise) {
return false;
}
args.rval().setObject(*promise);
return true;
}
static bool intrinsic_CopyDataPropertiesOrGetOwnKeys(JSContext* cx,
unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 3);
MOZ_ASSERT(args[0].isObject());
MOZ_ASSERT(args[1].isObject());
MOZ_ASSERT(args[2].isObjectOrNull());
RootedObject target(cx, &args[0].toObject());
RootedObject from(cx, &args[1].toObject());
RootedObject excludedItems(cx, args[2].toObjectOrNull());
if (from->is<NativeObject>() && target->is<PlainObject>() &&
(!excludedItems || excludedItems->is<PlainObject>())) {
bool optimized;
if (!CopyDataPropertiesNative(
cx, target.as<PlainObject>(), from.as<NativeObject>(),
(excludedItems ? excludedItems.as<PlainObject>() : nullptr),
&optimized)) {
return false;
}
if (optimized) {
args.rval().setNull();
return true;
}
}
return GetOwnPropertyKeys(
cx, from, JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, args.rval());
}
static bool intrinsic_ToBigInt(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
BigInt* res = ToBigInt(cx, args[0]);
if (!res) {
return false;
}
args.rval().setBigInt(res);
return true;
}
static bool intrinsic_NumberToBigInt(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isNumber());
BigInt* res = NumberToBigInt(cx, args[0].toNumber());
if (!res) {
return false;
}
args.rval().setBigInt(res);
return true;
}
static bool intrinsic_BigIntToNumber(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
MOZ_ASSERT(args[0].isBigInt());
args.rval().setNumber(BigInt::numberValue(args[0].toBigInt()));
return true;
}
static bool intrinsic_NewWrapForValidIterator(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewWrapForValidIterator(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
static bool intrinsic_NewIteratorHelper(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewIteratorHelper(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
static bool intrinsic_NewAsyncIteratorHelper(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewAsyncIteratorHelper(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
#ifdef NIGHTLY_BUILD
static bool intrinsic_NewIteratorRange(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JSObject* obj = NewIteratorRange(cx);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
#endif
static JSObject* NewIteratorRecord(JSContext* cx, HandleObject iterator,
HandleValue nextMethod) {
gc::AllocKind allocKind = gc::GetGCObjectKind(3);
Rooted<PlainObject*> obj(
cx, NewPlainObjectWithProtoAndAllocKind(cx, nullptr, allocKind));
if (!obj) {
return nullptr;
}
RootedId propid(cx, NameToId(cx->names().iterator));
RootedValue value(cx, ObjectValue(*iterator));
if (!NativeDefineDataProperty(cx, obj, propid, value, JSPROP_ENUMERATE)) {
return nullptr;
}
propid = NameToId(cx->names().nextMethod);
value.set(nextMethod);
if (!NativeDefineDataProperty(cx, obj, propid, value, JSPROP_ENUMERATE)) {
return nullptr;
}
propid = NameToId(cx->names().done);
value.setBoolean(false);
if (!NativeDefineDataProperty(cx, obj, propid, value, JSPROP_ENUMERATE)) {
return nullptr;
}
return obj;
}
static bool intrinsic_CreateAsyncFromSyncIterator(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 2);
RootedObject iterator(cx, &args[0].toObject());
RootedObject asyncIterator(
cx, CreateAsyncFromSyncIterator(cx, iterator, args[1]));
if (!asyncIterator) {
return false;
}
RootedValue nextMethod(cx);
if (!GetProperty(cx, asyncIterator, asyncIterator, cx->names().next,
&nextMethod)) {
return false;
}
RootedObject iteratorRecord(cx,
NewIteratorRecord(cx, asyncIterator, nextMethod));
if (!iteratorRecord) {
return false;
}
args.rval().setObject(*iteratorRecord);
return true;
}
static bool intrinsic_NoPrivateGetter(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
JSMSG_PRIVATE_SETTER_ONLY);
args.rval().setUndefined();
return false;
}
static bool intrinsic_newList(JSContext* cx, unsigned argc, js::Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 0);
ArrayObject* list = NewArrayWithNullProto(cx);
if (!list) {
return false;
}
args.rval().setObject(*list);
return true;
}
#ifdef JS_HAS_INTL_API
static bool intrinsic_ToTemporalDuration(JSContext* cx, unsigned argc,
js::Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
MOZ_ASSERT(args.length() == 1);
using namespace temporal;
// Return |null| if Temporal is disabled.
if (!JS::Prefs::experimental_temporal()) {
args.rval().setNull();
return true;
}
Duration duration;
if (!ToTemporalDuration(cx, args.get(0), &duration)) {
return false;
}
// Normalize -0 to +0 by adding zero.
duration.years += +0.0;
duration.months += +0.0;
duration.weeks += +0.0;
duration.days += +0.0;
duration.hours += +0.0;
duration.minutes += +0.0;
duration.seconds += +0.0;
duration.milliseconds += +0.0;
duration.microseconds += +0.0;
duration.nanoseconds += +0.0;
// Create a new plain object to ensure there are no observable calls to
// `Temporal.Duration.prototype` getters.
Rooted<IdValueVector> properties(cx, cx);
if (!properties.emplaceBack(NameToId(cx->names().years),
NumberValue(duration.years))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().months),
NumberValue(duration.months))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().weeks),
NumberValue(duration.weeks))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().days),
NumberValue(duration.days))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().hours),
NumberValue(duration.hours))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().minutes),
NumberValue(duration.minutes))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().seconds),
NumberValue(duration.seconds))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().milliseconds),
NumberValue(duration.milliseconds))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().microseconds),
NumberValue(duration.microseconds))) {
return false;
}
if (!properties.emplaceBack(NameToId(cx->names().nanoseconds),
NumberValue(duration.nanoseconds))) {
return false;
}
auto* result = NewPlainObjectWithUniqueNames(cx, properties);
if (!result) {
return false;
}
args.rval().setObject(*result);
return true;
}
#endif
static const JSFunctionSpec intrinsic_functions[] = {
// Intrinsic helper functions
JS_INLINABLE_FN("ArrayIteratorPrototypeOptimizable",
intrinsic_ArrayIteratorPrototypeOptimizable, 0, 0,
IntrinsicArrayIteratorPrototypeOptimizable),
JS_FN("AssertionFailed", intrinsic_AssertionFailed, 1, 0),
JS_FN("BigIntToNumber", intrinsic_BigIntToNumber, 1, 0),
JS_FN("CallArrayIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<ArrayIteratorObject>>, 2, 0),
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
JS_FN("CallAsyncDisposableStackMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<AsyncDisposableStackObject>>, 2, 0),
#endif
JS_FN("CallAsyncIteratorHelperMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<AsyncIteratorHelperObject>>, 2, 0),
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
JS_FN("CallDisposableStackMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<DisposableStackObject>>, 2, 0),
#endif
JS_FN("CallGeneratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<GeneratorObject>>, 2, 0),
JS_FN("CallIteratorHelperMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<IteratorHelperObject>>, 2, 0),
#ifdef NIGHTLY_BUILD
JS_FN("CallIteratorRangeMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<IteratorRangeObject>>, 2, 0),
#endif
JS_FN("CallMapIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<MapIteratorObject>>, 2, 0),
JS_FN("CallMapMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<MapObject>>, 2, 0),
JS_FN("CallRegExpMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<RegExpObject>>, 2, 0),
JS_FN("CallRegExpStringIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<RegExpStringIteratorObject>>, 2, 0),
JS_FN("CallSetIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<SetIteratorObject>>, 2, 0),
JS_FN("CallSetMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<SetObject>>, 2, 0),
JS_FN("CallStringIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<StringIteratorObject>>, 2, 0),
JS_FN("CallTypedArrayMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<TypedArrayObject>>, 2, 0),
JS_FN("CallWeakMapMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<WeakMapObject>>, 2, 0),
JS_FN("CallWrapForValidIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<WrapForValidIteratorObject>>, 2, 0),
JS_INLINABLE_FN("CanOptimizeArraySpecies",
intrinsic_CanOptimizeArraySpecies, 1, 0,
IntrinsicCanOptimizeArraySpecies),
JS_INLINABLE_FN("CanOptimizeStringProtoSymbolLookup",
intrinsic_CanOptimizeStringProtoSymbolLookup, 0, 0,
IntrinsicCanOptimizeStringProtoSymbolLookup),
JS_FN("ConstructFunction", intrinsic_ConstructFunction, 2, 0),
JS_FN("ConstructorForTypedArray", intrinsic_ConstructorForTypedArray, 1, 0),
JS_FN("CopyDataPropertiesOrGetOwnKeys",
intrinsic_CopyDataPropertiesOrGetOwnKeys, 3, 0),
JS_FN("CreateAsyncFromSyncIterator", intrinsic_CreateAsyncFromSyncIterator,
2, 0),
JS_FN("CreateMapIterationResultPair",
intrinsic_CreateMapIterationResultPair, 0, 0),
JS_FN("CreateSetIterationResult", intrinsic_CreateSetIterationResult, 0, 0),
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
JS_FN("CreateSuppressedError", intrinsic_CreateSuppressedError, 2, 0),
#endif
JS_FN("DecompileArg", intrinsic_DecompileArg, 2, 0),
JS_FN("DefineDataProperty", intrinsic_DefineDataProperty, 4, 0),
JS_FN("DefineProperty", intrinsic_DefineProperty, 6, 0),
JS_FN("DumpMessage", intrinsic_DumpMessage, 1, 0),
JS_FN("FlatStringMatch", FlatStringMatch, 2, 0),
JS_FN("FlatStringSearch", FlatStringSearch, 2, 0),
JS_FN("GeneratorIsRunning", intrinsic_GeneratorIsRunning, 1, 0),
JS_FN("GeneratorObjectIsClosed", intrinsic_GeneratorObjectIsClosed, 1, 0),
JS_FN("GeneratorSetClosed", intrinsic_GeneratorSetClosed, 1, 0),
JS_FN("GetElemBaseForLambda", intrinsic_GetElemBaseForLambda, 1, 0),
JS_INLINABLE_FN("GetFirstDollarIndex", GetFirstDollarIndex, 1, 0,
GetFirstDollarIndex),
JS_INLINABLE_FN("GetNextMapEntryForIterator",
intrinsic_GetNextMapEntryForIterator, 2, 0,
IntrinsicGetNextMapEntryForIterator),
JS_INLINABLE_FN("GetNextSetEntryForIterator",
intrinsic_GetNextSetEntryForIterator, 2, 0,
IntrinsicGetNextSetEntryForIterator),
JS_FN("GetOwnPropertyDescriptorToArray", GetOwnPropertyDescriptorToArray, 2,
0),
JS_FN("GetStringDataProperty", intrinsic_GetStringDataProperty, 2, 0),
JS_INLINABLE_FN("GuardToArrayBuffer",
intrinsic_GuardToBuiltin<ArrayBufferObject>, 1, 0,
IntrinsicGuardToArrayBuffer),
JS_INLINABLE_FN("GuardToArrayIterator",
intrinsic_GuardToBuiltin<ArrayIteratorObject>, 1, 0,
IntrinsicGuardToArrayIterator),
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
JS_INLINABLE_FN("GuardToAsyncDisposableStackHelper",
intrinsic_GuardToBuiltin<AsyncDisposableStackObject>, 1, 0,
IntrinsicGuardToAsyncDisposableStack),
#endif
JS_INLINABLE_FN("GuardToAsyncIteratorHelper",
intrinsic_GuardToBuiltin<AsyncIteratorHelperObject>, 1, 0,
IntrinsicGuardToAsyncIteratorHelper),
#ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
JS_INLINABLE_FN("GuardToDisposableStackHelper",
intrinsic_GuardToBuiltin<DisposableStackObject>, 1, 0,
IntrinsicGuardToDisposableStack),
#endif
JS_INLINABLE_FN("GuardToIteratorHelper",
intrinsic_GuardToBuiltin<IteratorHelperObject>, 1, 0,
IntrinsicGuardToIteratorHelper),
#ifdef NIGHTLY_BUILD
JS_INLINABLE_FN("GuardToIteratorRange",
intrinsic_GuardToBuiltin<IteratorRangeObject>, 1, 0,
IntrinsicGuardToIteratorRange),
#endif
JS_INLINABLE_FN("GuardToMapIterator",
intrinsic_GuardToBuiltin<MapIteratorObject>, 1, 0,
IntrinsicGuardToMapIterator),
JS_INLINABLE_FN("GuardToMapObject", intrinsic_GuardToBuiltin<MapObject>, 1,
0, IntrinsicGuardToMapObject),
JS_INLINABLE_FN("GuardToRegExpStringIterator",
intrinsic_GuardToBuiltin<RegExpStringIteratorObject>, 1, 0,
IntrinsicGuardToRegExpStringIterator),
JS_INLINABLE_FN("GuardToSetIterator",
intrinsic_GuardToBuiltin<SetIteratorObject>, 1, 0,
IntrinsicGuardToSetIterator),
JS_INLINABLE_FN("GuardToSetObject", intrinsic_GuardToBuiltin<SetObject>, 1,
0, IntrinsicGuardToSetObject),
JS_INLINABLE_FN("GuardToSharedArrayBuffer",
intrinsic_GuardToBuiltin<SharedArrayBufferObject>, 1, 0,
IntrinsicGuardToSharedArrayBuffer),
JS_INLINABLE_FN("GuardToStringIterator",
intrinsic_GuardToBuiltin<StringIteratorObject>, 1, 0,
IntrinsicGuardToStringIterator),
JS_FN("GuardToWeakMapObject", intrinsic_GuardToBuiltin<WeakMapObject>, 1,
0),
JS_INLINABLE_FN("GuardToWrapForValidIterator",
intrinsic_GuardToBuiltin<WrapForValidIteratorObject>, 1, 0,
IntrinsicGuardToWrapForValidIterator),
JS_FN("IntrinsicAsyncGeneratorNext", AsyncGeneratorNext, 1, 0),
JS_FN("IntrinsicAsyncGeneratorReturn", AsyncGeneratorReturn, 1, 0),
JS_FN("IntrinsicAsyncGeneratorThrow", AsyncGeneratorThrow, 1, 0),
JS_INLINABLE_FN("IsArray", intrinsic_IsArray, 1, 0, ArrayIsArray),
JS_FN("IsAsyncFunctionGeneratorObject",
intrinsic_IsInstanceOfBuiltin<AsyncFunctionGeneratorObject>, 1, 0),
JS_FN("IsAsyncGeneratorObject",
intrinsic_IsInstanceOfBuiltin<AsyncGeneratorObject>, 1, 0),
JS_INLINABLE_FN("IsCallable", intrinsic_IsCallable, 1, 0,
IntrinsicIsCallable),
JS_INLINABLE_FN("IsConstructing", intrinsic_IsConstructing, 0, 0,
IntrinsicIsConstructing),
JS_INLINABLE_FN("IsConstructor", intrinsic_IsConstructor, 1, 0,
IntrinsicIsConstructor),
JS_INLINABLE_FN("IsCrossRealmArrayConstructor",
intrinsic_IsCrossRealmArrayConstructor, 1, 0,
IntrinsicIsCrossRealmArrayConstructor),
JS_FN("IsGeneratorObject", intrinsic_IsInstanceOfBuiltin<GeneratorObject>,
1, 0),
JS_INLINABLE_FN("IsObject", intrinsic_IsObject, 1, 0, IntrinsicIsObject),
JS_INLINABLE_FN("IsOptimizableRegExpObject", IsOptimizableRegExpObject, 1,
0, IsOptimizableRegExpObject),
JS_INLINABLE_FN("IsPackedArray", intrinsic_IsPackedArray, 1, 0,
IntrinsicIsPackedArray),
JS_INLINABLE_FN("IsPossiblyWrappedRegExpObject",
intrinsic_IsPossiblyWrappedInstanceOfBuiltin<RegExpObject>,
1, 0, IsPossiblyWrappedRegExpObject),
JS_INLINABLE_FN(
"IsPossiblyWrappedTypedArray",
intrinsic_IsPossiblyWrappedInstanceOfBuiltin<TypedArrayObject>, 1, 0,
IntrinsicIsPossiblyWrappedTypedArray),
JS_INLINABLE_FN("IsRegExpObject",
intrinsic_IsInstanceOfBuiltin<RegExpObject>, 1, 0,
IsRegExpObject),
JS_INLINABLE_FN("IsRegExpPrototypeOptimizable",
IsRegExpPrototypeOptimizable, 0, 0,
IsRegExpPrototypeOptimizable),
JS_INLINABLE_FN("IsSuspendedGenerator", intrinsic_IsSuspendedGenerator, 1,
0, IntrinsicIsSuspendedGenerator),
JS_INLINABLE_FN("IsTypedArray",
intrinsic_IsInstanceOfBuiltin<TypedArrayObject>, 1, 0,
IntrinsicIsTypedArray),
JS_INLINABLE_FN("IsTypedArrayConstructor",
intrinsic_IsTypedArrayConstructor, 1, 0,
IntrinsicIsTypedArrayConstructor),
JS_INLINABLE_FN("NewArrayIterator", intrinsic_NewArrayIterator, 0, 0,
IntrinsicNewArrayIterator),
JS_FN("NewAsyncIteratorHelper", intrinsic_NewAsyncIteratorHelper, 0, 0),
JS_FN("NewIteratorHelper", intrinsic_NewIteratorHelper, 0, 0),
#ifdef NIGHTLY_BUILD
JS_FN("NewIteratorRange", intrinsic_NewIteratorRange, 0, 0),
#endif
JS_INLINABLE_FN("NewRegExpStringIterator",
intrinsic_NewRegExpStringIterator, 0, 0,
IntrinsicNewRegExpStringIterator),
JS_INLINABLE_FN("NewStringIterator", intrinsic_NewStringIterator, 0, 0,
IntrinsicNewStringIterator),
JS_FN("NewWrapForValidIterator", intrinsic_NewWrapForValidIterator, 0, 0),
JS_FN("NoPrivateGetter", intrinsic_NoPrivateGetter, 1, 0),
JS_FN("NumberToBigInt", intrinsic_NumberToBigInt, 1, 0),
JS_FN("PossiblyWrappedTypedArrayHasDetachedBuffer",
intrinsic_PossiblyWrappedTypedArrayHasDetachedBuffer, 1, 0),
JS_INLINABLE_FN("PossiblyWrappedTypedArrayLength",
intrinsic_PossiblyWrappedTypedArrayLength, 1, 0,
IntrinsicPossiblyWrappedTypedArrayLength),
JS_FN("PromiseResolve", intrinsic_PromiseResolve, 2, 0),
JS_INLINABLE_FN("RegExpBuiltinExec", intrinsic_RegExpBuiltinExec<false>, 2,
0, IntrinsicRegExpBuiltinExec),
JS_INLINABLE_FN("RegExpBuiltinExecForTest",
intrinsic_RegExpBuiltinExec<true>, 2, 0,
IntrinsicRegExpBuiltinExecForTest),
JS_FN("RegExpConstructRaw", regexp_construct_raw_flags, 2, 0),
JS_FN("RegExpCreate", intrinsic_RegExpCreate, 2, 0),
JS_INLINABLE_FN("RegExpExec", intrinsic_RegExpExec<false>, 2, 0,
IntrinsicRegExpExec),
JS_INLINABLE_FN("RegExpExecForTest", intrinsic_RegExpExec<true>, 2, 0,
IntrinsicRegExpExecForTest),
JS_FN("RegExpGetSubstitution", intrinsic_RegExpGetSubstitution, 5, 0),
JS_INLINABLE_FN("RegExpHasCaptureGroups", intrinsic_RegExpHasCaptureGroups,
2, 0, RegExpHasCaptureGroups),
JS_INLINABLE_FN("RegExpMatcher", RegExpMatcher, 3, 0, RegExpMatcher),
JS_INLINABLE_FN("RegExpSearcher", RegExpSearcher, 3, 0, RegExpSearcher),
JS_INLINABLE_FN("RegExpSearcherLastLimit", RegExpSearcherLastLimit, 0, 0,
RegExpSearcherLastLimit),
JS_FN("RegExpSymbolProtocolOnPrimitiveCounter",
intrinsic_RegExpSymbolProtocolOnPrimitiveCounter, 0, 0),
JS_INLINABLE_FN("SameValue", js::obj_is, 2, 0, ObjectIs),
JS_FN("SetCopy", SetObject::copy, 1, 0),
JS_FN("StringReplaceAllString", intrinsic_StringReplaceAllString, 3, 0),
JS_INLINABLE_FN("StringReplaceString", intrinsic_StringReplaceString, 3, 0,
IntrinsicStringReplaceString),
JS_INLINABLE_FN("StringSplitString", intrinsic_StringSplitString, 2, 0,
IntrinsicStringSplitString),
JS_FN("StringSplitStringLimit", intrinsic_StringSplitStringLimit, 3, 0),
JS_INLINABLE_FN("SubstringKernel", intrinsic_SubstringKernel, 3, 0,
IntrinsicSubstringKernel),
JS_FN("ThisNumberValueForToLocaleString", ThisNumberValueForToLocaleString,
0, 0),
JS_INLINABLE_FN("ThisTimeValue", intrinsic_ThisTimeValue, 1, 0,
IntrinsicThisTimeValue),
JS_FN("ThrowAggregateError", intrinsic_ThrowAggregateError, 4, 0),
JS_FN("ThrowInternalError", intrinsic_ThrowInternalError, 4, 0),
JS_FN("ThrowRangeError", intrinsic_ThrowRangeError, 4, 0),
JS_FN("ThrowTypeError", intrinsic_ThrowTypeError, 4, 0),
JS_FN("ToBigInt", intrinsic_ToBigInt, 1, 0),
JS_INLINABLE_FN("ToInteger", intrinsic_ToInteger, 1, 0, IntrinsicToInteger),
JS_INLINABLE_FN("ToLength", intrinsic_ToLength, 1, 0, IntrinsicToLength),
JS_INLINABLE_FN("ToObject", intrinsic_ToObject, 1, 0, IntrinsicToObject),
JS_FN("ToPropertyKey", intrinsic_ToPropertyKey, 1, 0),
JS_FN("ToSource", intrinsic_ToSource, 1, 0),
#ifdef JS_HAS_INTL_API
JS_FN("ToTemporalDuration", intrinsic_ToTemporalDuration, 1, 0),
#endif
JS_FN("TypedArrayBitwiseSlice", intrinsic_TypedArrayBitwiseSlice, 4, 0),
JS_FN("TypedArrayBuffer", intrinsic_TypedArrayBuffer, 1, 0),
JS_INLINABLE_FN("TypedArrayByteOffset", intrinsic_TypedArrayByteOffset, 1,
0, IntrinsicTypedArrayByteOffset),
JS_INLINABLE_FN("TypedArrayElementSize", intrinsic_TypedArrayElementSize, 1,
0, IntrinsicTypedArrayElementSize),
JS_FN("TypedArrayInitFromPackedArray",
intrinsic_TypedArrayInitFromPackedArray, 2, 0),
JS_FN("TypedArrayIsAutoLength", intrinsic_TypedArrayIsAutoLength, 1, 0),
JS_INLINABLE_FN("TypedArrayLength", intrinsic_TypedArrayLength, 1, 0,
IntrinsicTypedArrayLength),
JS_INLINABLE_FN("TypedArrayLengthZeroOnOutOfBounds",
intrinsic_TypedArrayLengthZeroOnOutOfBounds, 1, 0,
IntrinsicTypedArrayLengthZeroOnOutOfBounds),
JS_INLINABLE_FN("UnsafeGetInt32FromReservedSlot",
intrinsic_UnsafeGetInt32FromReservedSlot, 2, 0,
IntrinsicUnsafeGetInt32FromReservedSlot),
JS_INLINABLE_FN("UnsafeGetObjectFromReservedSlot",
intrinsic_UnsafeGetObjectFromReservedSlot, 2, 0,
IntrinsicUnsafeGetObjectFromReservedSlot),
JS_INLINABLE_FN("UnsafeGetReservedSlot", intrinsic_UnsafeGetReservedSlot, 2,
0, IntrinsicUnsafeGetReservedSlot),
JS_INLINABLE_FN("UnsafeGetStringFromReservedSlot",
intrinsic_UnsafeGetStringFromReservedSlot, 2, 0,
IntrinsicUnsafeGetStringFromReservedSlot),
JS_INLINABLE_FN("UnsafeSetReservedSlot", intrinsic_UnsafeSetReservedSlot, 3,
0, IntrinsicUnsafeSetReservedSlot),
// Intrinsics and standard functions used by Intl API implementation.
#ifdef JS_HAS_INTL_API
JS_FN("intl_BestAvailableLocale", intl_BestAvailableLocale, 3, 0),
JS_FN("intl_CallCollatorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<CollatorObject>>, 2, 0),
JS_FN("intl_CallDateTimeFormatMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<DateTimeFormatObject>>, 2, 0),
JS_FN("intl_CallDisplayNamesMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<DisplayNamesObject>>, 2, 0),
JS_FN("intl_CallDurationFormatMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<DurationFormatObject>>, 2, 0),
JS_FN("intl_CallListFormatMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<ListFormatObject>>, 2, 0),
JS_FN("intl_CallNumberFormatMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<NumberFormatObject>>, 2, 0),
JS_FN("intl_CallPluralRulesMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<PluralRulesObject>>, 2, 0),
JS_FN("intl_CallRelativeTimeFormatMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<RelativeTimeFormatObject>>, 2, 0),
JS_FN("intl_CallSegmentIteratorMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<SegmentIteratorObject>>, 2, 0),
JS_FN("intl_CallSegmenterMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<SegmenterObject>>, 2, 0),
JS_FN("intl_CallSegmentsMethodIfWrapped",
CallNonGenericSelfhostedMethod<Is<SegmentsObject>>, 2, 0),
JS_FN("intl_Collator", intl_Collator, 2, 0),
JS_FN("intl_CompareStrings", intl_CompareStrings, 3, 0),
JS_FN("intl_ComputeDisplayName", intl_ComputeDisplayName, 6, 0),
JS_FN("intl_CreateDateTimeFormat", intl_CreateDateTimeFormat, 4, 0),
JS_FN("intl_CreateSegmentIterator", intl_CreateSegmentIterator, 1, 0),
JS_FN("intl_CreateSegmentsObject", intl_CreateSegmentsObject, 2, 0),
JS_FN("intl_FindNextSegmentBoundaries", intl_FindNextSegmentBoundaries, 1,
0),
JS_FN("intl_FindSegmentBoundaries", intl_FindSegmentBoundaries, 2, 0),
JS_FN("intl_FormatDateTime", intl_FormatDateTime, 2, 0),
JS_FN("intl_FormatDateTimeRange", intl_FormatDateTimeRange, 4, 0),
JS_FN("intl_FormatList", intl_FormatList, 3, 0),
JS_FN("intl_FormatNumber", intl_FormatNumber, 3, 0),
JS_FN("intl_FormatNumberRange", intl_FormatNumberRange, 4, 0),
JS_FN("intl_FormatRelativeTime", intl_FormatRelativeTime, 4, 0),
JS_FN("intl_GetCalendarInfo", intl_GetCalendarInfo, 1, 0),
JS_FN("intl_GetPluralCategories", intl_GetPluralCategories, 1, 0),
JS_FN("intl_GetTimeSeparator", intl_GetTimeSeparator, 2, 0),
JS_INLINABLE_FN("intl_GuardToCollator",
intrinsic_GuardToBuiltin<CollatorObject>, 1, 0,
IntlGuardToCollator),
JS_INLINABLE_FN("intl_GuardToDateTimeFormat",
intrinsic_GuardToBuiltin<DateTimeFormatObject>, 1, 0,
IntlGuardToDateTimeFormat),
JS_INLINABLE_FN("intl_GuardToDisplayNames",
intrinsic_GuardToBuiltin<DisplayNamesObject>, 1, 0,
IntlGuardToDisplayNames),
JS_INLINABLE_FN("intl_GuardToDurationFormat",
intrinsic_GuardToBuiltin<DurationFormatObject>, 1, 0,
IntlGuardToDurationFormat),
JS_INLINABLE_FN("intl_GuardToListFormat",
intrinsic_GuardToBuiltin<ListFormatObject>, 1, 0,
IntlGuardToListFormat),
JS_INLINABLE_FN("intl_GuardToNumberFormat",
intrinsic_GuardToBuiltin<NumberFormatObject>, 1, 0,
IntlGuardToNumberFormat),
JS_INLINABLE_FN("intl_GuardToPluralRules",
intrinsic_GuardToBuiltin<PluralRulesObject>, 1, 0,
IntlGuardToPluralRules),
JS_INLINABLE_FN("intl_GuardToRelativeTimeFormat",
intrinsic_GuardToBuiltin<RelativeTimeFormatObject>, 1, 0,
IntlGuardToRelativeTimeFormat),
JS_INLINABLE_FN("intl_GuardToSegmentIterator",
intrinsic_GuardToBuiltin<SegmentIteratorObject>, 1, 0,
IntlGuardToSegmentIterator),
JS_INLINABLE_FN("intl_GuardToSegmenter",
intrinsic_GuardToBuiltin<SegmenterObject>, 1, 0,
IntlGuardToSegmenter),
JS_INLINABLE_FN("intl_GuardToSegments",
intrinsic_GuardToBuiltin<SegmentsObject>, 1, 0,
IntlGuardToSegments),
JS_FN("intl_IsRuntimeDefaultLocale", intrinsic_IsRuntimeDefaultLocale, 1,
0),
JS_FN("intl_IsValidTimeZoneName", intl_IsValidTimeZoneName, 1, 0),
JS_FN("intl_IsWrappedDateTimeFormat",
intrinsic_IsWrappedInstanceOfBuiltin<DateTimeFormatObject>, 1, 0),
JS_FN("intl_IsWrappedNumberFormat",
intrinsic_IsWrappedInstanceOfBuiltin<NumberFormatObject>, 1, 0),
JS_FN("intl_NumberFormat", intl_NumberFormat, 2, 0),
JS_FN("intl_RuntimeDefaultLocale", intrinsic_RuntimeDefaultLocale, 0, 0),
JS_FN("intl_SelectPluralRule", intl_SelectPluralRule, 2, 0),
JS_FN("intl_SelectPluralRuleRange", intl_SelectPluralRuleRange, 3, 0),
JS_FN("intl_SupportedValuesOf", intl_SupportedValuesOf, 1, 0),
JS_FN("intl_TryValidateAndCanonicalizeLanguageTag",
intl_TryValidateAndCanonicalizeLanguageTag, 1, 0),
JS_FN("intl_ValidateAndCanonicalizeLanguageTag",
intl_ValidateAndCanonicalizeLanguageTag, 2, 0),
JS_FN("intl_ValidateAndCanonicalizeUnicodeExtensionType",
intl_ValidateAndCanonicalizeUnicodeExtensionType, 3, 0),
JS_FN("intl_availableCalendars", intl_availableCalendars, 1, 0),
JS_FN("intl_availableCollations", intl_availableCollations, 1, 0),
# if DEBUG || MOZ_SYSTEM_ICU
JS_FN("intl_availableMeasurementUnits", intl_availableMeasurementUnits, 0,
0),
# endif
JS_FN("intl_canonicalizeTimeZone", intl_canonicalizeTimeZone, 1, 0),
JS_FN("intl_defaultCalendar", intl_defaultCalendar, 1, 0),
JS_FN("intl_defaultTimeZone", intl_defaultTimeZone, 0, 0),
JS_FN("intl_defaultTimeZoneOffset", intl_defaultTimeZoneOffset, 0, 0),
JS_FN("intl_isDefaultTimeZone", intl_isDefaultTimeZone, 1, 0),
JS_FN("intl_isIgnorePunctuation", intl_isIgnorePunctuation, 1, 0),
JS_FN("intl_isUpperCaseFirst", intl_isUpperCaseFirst, 1, 0),
JS_FN("intl_numberingSystem", intl_numberingSystem, 1, 0),
JS_FN("intl_resolveDateTimeFormatComponents",
intl_resolveDateTimeFormatComponents, 3, 0),
JS_FN("intl_supportedLocaleOrFallback", intl_supportedLocaleOrFallback, 1,
0),
JS_FN("intl_toLocaleLowerCase", intl_toLocaleLowerCase, 2, 0),
JS_FN("intl_toLocaleUpperCase", intl_toLocaleUpperCase, 2, 0),
#endif // JS_HAS_INTL_API
// Standard builtins used by self-hosting.
JS_FN("new_List", intrinsic_newList, 0, 0),
JS_INLINABLE_FN("std_Array", array_construct, 1, 0, Array),
JS_FN("std_Array_includes", array_includes, 1, 0),
JS_FN("std_Array_indexOf", array_indexOf, 1, 0),
JS_FN("std_Array_lastIndexOf", array_lastIndexOf, 1, 0),
JS_INLINABLE_FN("std_Array_pop", array_pop, 0, 0, ArrayPop),
JS_TRAMPOLINE_FN("std_Array_sort", array_sort, 1, 0, ArraySort),
JS_FN("std_BigInt_valueOf", BigIntObject::valueOf, 0, 0),
JS_FN("std_Function_apply", fun_apply, 2, 0),
JS_FN("std_Map_entries", MapObject::entries, 0, 0),
JS_FN("std_Map_get", MapObject::get, 1, 0),
JS_FN("std_Map_has", MapObject::has, 1, 0),
JS_FN("std_Map_set", MapObject::set, 2, 0),
JS_INLINABLE_FN("std_Math_abs", math_abs, 1, 0, MathAbs),
JS_INLINABLE_FN("std_Math_floor", math_floor, 1, 0, MathFloor),
JS_INLINABLE_FN("std_Math_max", math_max, 2, 0, MathMax),
JS_INLINABLE_FN("std_Math_min", math_min, 2, 0, MathMin),
JS_INLINABLE_FN("std_Math_sign", math_sign, 1, 0, MathSign),
JS_INLINABLE_FN("std_Math_trunc", math_trunc, 1, 0, MathTrunc),
JS_INLINABLE_FN("std_Object_create", obj_create, 2, 0, ObjectCreate),
JS_INLINABLE_FN("std_Object_isPrototypeOf", obj_isPrototypeOf, 1, 0,
ObjectIsPrototypeOf),
JS_FN("std_Object_propertyIsEnumerable", obj_propertyIsEnumerable, 1, 0),
JS_FN("std_Object_setProto", obj_setProto, 1, 0),
JS_FN("std_Object_toString", obj_toString, 0, 0),
JS_INLINABLE_FN("std_Reflect_getPrototypeOf", Reflect_getPrototypeOf, 1, 0,
ReflectGetPrototypeOf),
JS_FN("std_Reflect_isExtensible", Reflect_isExtensible, 1, 0),
JS_FN("std_Reflect_ownKeys", Reflect_ownKeys, 1, 0),
JS_FN("std_Set_add", SetObject::add, 1, 0),
JS_FN("std_Set_delete", SetObject::delete_, 1, 0),
JS_INLINABLE_FN("std_Set_has", SetObject::has, 1, 0, SetHas),
JS_INLINABLE_FN("std_Set_size", SetObject::size, 1, 0, SetSize),
JS_FN("std_Set_values", SetObject::values, 0, 0),
JS_INLINABLE_FN("std_String_charCodeAt", str_charCodeAt, 1, 0,
StringCharCodeAt),
JS_INLINABLE_FN("std_String_codePointAt", str_codePointAt, 1, 0,
StringCodePointAt),
JS_INLINABLE_FN("std_String_endsWith", str_endsWith, 1, 0, StringEndsWith),
JS_INLINABLE_FN("std_String_fromCharCode", str_fromCharCode, 1, 0,
StringFromCharCode),
JS_INLINABLE_FN("std_String_fromCodePoint", str_fromCodePoint, 1, 0,
StringFromCodePoint),
JS_FN("std_String_includes", str_includes, 1, 0),
JS_INLINABLE_FN("std_String_indexOf", str_indexOf, 1, 0, StringIndexOf),
JS_INLINABLE_FN("std_String_startsWith", str_startsWith, 1, 0,
StringStartsWith),
JS_TRAMPOLINE_FN("std_TypedArray_sort", TypedArrayObject::sort, 1, 0,
TypedArraySort),
JS_FN("std_WeakMap_get", WeakMapObject::get, 1, 0),
JS_FN("std_WeakMap_has", WeakMapObject::has, 1, 0),
JS_FN("std_WeakMap_set", WeakMapObject::set, 2, 0),
JS_FS_END,
};
#ifdef DEBUG
static void CheckSelfHostedIntrinsics() {
// The `intrinsic_functions` list must be sorted so that we can use
// mozilla::BinarySearch to do lookups on demand.
const char* prev = "";
for (JSFunctionSpec spec : intrinsic_functions) {
if (spec.name.string()) {
MOZ_ASSERT(strcmp(prev, spec.name.string()) < 0,
"Self-hosted intrinsics must be sorted");
prev = spec.name.string();
}
}
}
class CheckTenuredTracer : public JS::CallbackTracer {
HashSet<gc::Cell*, DefaultHasher<gc::Cell*>, SystemAllocPolicy> visited;
Vector<JS::GCCellPtr, 0, SystemAllocPolicy> stack;
public:
explicit CheckTenuredTracer(JSRuntime* rt) : JS::CallbackTracer(rt) {}
void check() {
while (!stack.empty()) {
JS::TraceChildren(this, stack.popCopy());
}
}
void onChild(JS::GCCellPtr thing, const char* name) override {
gc::Cell* cell = thing.asCell();
MOZ_RELEASE_ASSERT(cell->isTenured(), "Expected tenured cell");
if (!visited.has(cell)) {
if (!visited.put(cell) || !stack.append(thing)) {
// Ignore OOM. This can happen during fuzzing.
return;
}
}
}
};
static void CheckSelfHostingDataIsTenured(JSRuntime* rt) {
// Check everything is tenured as we don't trace it when collecting the
// nursery.
CheckTenuredTracer trc(rt);
rt->traceSelfHostingStencil(&trc);
trc.check();
}
#endif
const JSFunctionSpec* js::FindIntrinsicSpec(js::PropertyName* name) {
size_t limit = std::size(intrinsic_functions) - 1;
MOZ_ASSERT(!intrinsic_functions[limit].name);
MOZ_ASSERT(name->hasLatin1Chars());
JS::AutoCheckCannotGC nogc;
const char* chars = reinterpret_cast<const char*>(name->latin1Chars(nogc));
size_t len = name->length();
// NOTE: CheckSelfHostedIntrinsics checks that the intrinsic_functions list is
// sorted appropriately so that we can use binary search here.
size_t loc = 0;
bool match = mozilla::BinarySearchIf(
intrinsic_functions, 0, limit,
[chars, len](const JSFunctionSpec& spec) {
// The spec string is null terminated but the `name` string is not, so
// compare chars up until the length of `name`. Since the `name` string
// does not contain any nulls, seeing the null terminator of the spec
// string will terminate the loop appropriately. A final comparison
// against null is needed to determine if the spec string has an extra
// suffix.
const char* spec_chars = spec.name.string();
for (size_t i = 0; i < len; ++i) {
if (auto cmp_result = int(chars[i]) - int(spec_chars[i])) {
return cmp_result;
}
}
return int('\0') - int(spec_chars[len]);
},
&loc);
if (match) {
return &intrinsic_functions[loc];
}
return nullptr;
}
void js::FillSelfHostingCompileOptions(CompileOptions& options) {
/*
* In self-hosting mode, scripts use JSOp::GetIntrinsic instead of
* JSOp::GetName or JSOp::GetGName to access unbound variables.
* JSOp::GetIntrinsic does a name lookup on a special object, whose
* properties are filled in lazily upon first access for a given global.
*
* As that object is inaccessible to client code, the lookups are
* guaranteed to return the original objects, ensuring safe implementation
* of self-hosted builtins.
*
* Additionally, the special syntax callFunction(fun, receiver, ...args)
* is supported, for which bytecode is emitted that invokes |fun| with
* |receiver| as the this-object and ...args as the arguments.
*/
options.setIntroductionType("self-hosted");
options.setFileAndLine("self-hosted", 1);
options.setSkipFilenameValidation(true);
options.setSelfHostingMode(true);
options.setForceFullParse();
options.setForceStrictMode();
options.setDiscardSource();
options.setIsRunOnce(true);
options.setNoScriptRval(true);
}
// Report all errors and warnings to stderr because it is too early in the
// startup process for any other error reporting to be used, and we don't want
// errors in self-hosted code to be silently swallowed.
class MOZ_STACK_CLASS AutoPrintSelfHostingFrontendContext
: public FrontendContext {
JSContext* cx_;
public:
explicit AutoPrintSelfHostingFrontendContext(JSContext* cx) : cx_(cx) {
setCurrentJSContext(cx_);
}
~AutoPrintSelfHostingFrontendContext() {
// TODO: Remove this once JSContext is removed from frontend.
MaybePrintAndClearPendingException(cx_);
if (hadOutOfMemory()) {
fprintf(stderr, "Out of memory\n");
}
if (maybeError()) {
JS::PrintError(stderr, &*maybeError(), true);
}
for (CompileError& error : warnings()) {
JS::PrintError(stderr, &error, true);
}
if (hadOverRecursed()) {
fprintf(stderr, "Over recursed\n");
}
if (hadAllocationOverflow()) {
fprintf(stderr, "Allocation overflow\n");
}
}
};
[[nodiscard]] static bool InitSelfHostingFromStencil(
JSContext* cx, frontend::CompilationAtomCache& atomCache,
const frontend::CompilationStencil& stencil) {
// Build the JSAtom -> ScriptIndexRange mapping and save on the runtime.
{
auto& scriptMap = cx->runtime()->selfHostScriptMap.ref();
// We don't easily know the number of top-level functions, so use the total
// number of stencil functions instead. There is very little nesting of
// functions in self-hosted code so this is a good approximation.
size_t numSelfHostedScripts = stencil.scriptData.size();
if (!scriptMap.reserve(numSelfHostedScripts)) {
ReportOutOfMemory(cx);
return false;
}
auto topLevelThings =
stencil.scriptData[frontend::CompilationStencil::TopLevelIndex]
.gcthings(stencil);
// Iterate over the (named) top-level functions. We record the ScriptIndex
// as well as the ScriptIndex of the next top-level function. Scripts
// between these two indices are the inner functions of the first one. We
// only record named scripts here since they are what might be looked up.
Rooted<JSAtom*> prevAtom(cx);
frontend::ScriptIndex prevIndex;
for (frontend::TaggedScriptThingIndex thing : topLevelThings) {
if (!thing.isFunction()) {
continue;
}
frontend::ScriptIndex index = thing.toFunction();
const auto& script = stencil.scriptData[index];
if (prevAtom) {
frontend::ScriptIndexRange range{prevIndex, index};
scriptMap.putNewInfallible(prevAtom, range);
}
prevAtom = script.functionAtom
? atomCache.getExistingAtomAt(cx, script.functionAtom)
: nullptr;
prevIndex = index;
}
if (prevAtom) {
frontend::ScriptIndexRange range{
prevIndex, frontend::ScriptIndex(stencil.scriptData.size())};
scriptMap.putNewInfallible(prevAtom, range);
}
// We over-estimated the capacity of `scriptMap`, so check that the estimate
// hasn't drifted too hasn't drifted too far since this was written. If this
// assert fails, we may need a new way to size the `scriptMap`.
MOZ_ASSERT(numSelfHostedScripts < (scriptMap.count() * 1.15));
}
#ifdef DEBUG
// Check that the list of intrinsics is well-formed.
CheckSelfHostedIntrinsics();
CheckSelfHostingDataIsTenured(cx->runtime());
#endif
return true;
}
bool JSRuntime::initSelfHostingStencil(JSContext* cx,
JS::SelfHostedCache xdrCache,
JS::SelfHostedWriter xdrWriter) {
if (parentRuntime) {
MOZ_RELEASE_ASSERT(
parentRuntime->hasInitializedSelfHosting(),
"Parent runtime must initialize self-hosting before workers");
selfHostStencilInput_ = parentRuntime->selfHostStencilInput_;
selfHostStencil_ = parentRuntime->selfHostStencil_;
return true;
}
auto start = mozilla::TimeStamp::Now();
// Variables used to instantiate scripts.
CompileOptions options(cx);
FillSelfHostingCompileOptions(options);
// Try initializing from Stencil XDR.
AutoPrintSelfHostingFrontendContext fc(cx);
if (xdrCache.Length() > 0) {
// Allow the VM to directly use bytecode from the XDR buffer without
// copying it. The buffer must outlive all runtimes (including workers).
options.borrowBuffer = true;
options.usePinnedBytecode = true;
Rooted<UniquePtr<frontend::CompilationInput>> input(
cx, cx->new_<frontend::CompilationInput>(options));
if (!input) {
return false;
}
{
AutoReportFrontendContext fc(cx);
if (!input->initForSelfHostingGlobal(&fc)) {
return false;
}
}
JS::DecodeOptions decodeOption(options);
RefPtr<frontend::CompilationStencil> stencil;
JS::TranscodeResult result =
js::DecodeStencil(&fc, decodeOption, xdrCache, getter_AddRefs(stencil));
if (result == JS::TranscodeResult::Ok) {
MOZ_ASSERT(input->atomCache.empty());
MOZ_ASSERT(!hasSelfHostStencil());
// Move it to the runtime.
setSelfHostingStencil(&input, std::move(stencil));
auto end = mozilla::TimeStamp::Now();
JS_LOG(startup, Info,
"Used XDR for process self-hosted startup. Took %f us",
(end - start).ToMicroseconds());
return true;
}
}
// If script wasn't generated, it means XDR was either not provided or that it
// failed the decoding phase. Parse from text as before.
uint32_t srcLen = GetRawScriptsSize();
const unsigned char* compressed = compressedSources;
uint32_t compressedLen = GetCompressedSize();
auto src = cx->make_pod_array<char>(srcLen);
if (!src) {
return false;
}
if (!DecompressString(compressed, compressedLen,
reinterpret_cast<unsigned char*>(src.get()), srcLen)) {
return false;
}
JS::SourceText<mozilla::Utf8Unit> srcBuf;
if (!srcBuf.init(cx, std::move(src), srcLen)) {
return false;
}
Rooted<UniquePtr<frontend::CompilationInput>> input(
cx, cx->new_<frontend::CompilationInput>(options));
if (!input) {
return false;
}
frontend::NoScopeBindingCache scopeCache;
RefPtr<frontend::CompilationStencil> stencil =
frontend::CompileGlobalScriptToStencilWithInput(
cx, &fc, cx->tempLifoAlloc(), *input, &scopeCache, srcBuf,
ScopeKind::Global);
if (!stencil) {
return false;
}
mozilla::TimeDuration xdrDuration;
// Serialize the stencil to XDR.
if (xdrWriter) {
auto encodeStart = mozilla::TimeStamp::Now();
JS::TranscodeBuffer xdrBuffer;
JS::TranscodeResult result = js::EncodeStencil(cx, stencil, xdrBuffer);
if (result != JS::TranscodeResult::Ok) {
JS_ReportErrorASCII(cx, "Encoding failure");
return false;
}
if (!xdrWriter(cx, xdrBuffer)) {
return false;
}
auto encodeEnd = mozilla::TimeStamp::Now();
xdrDuration = (encodeEnd - encodeStart);
JS_LOG(startup, Info, "Saved XDR Buffer. Took %f us",
xdrDuration.ToMicroseconds());
}
MOZ_ASSERT(input->atomCache.empty());
MOZ_ASSERT(!hasSelfHostStencil());
// Move it to the runtime.
setSelfHostingStencil(&input, std::move(stencil));
auto end = mozilla::TimeStamp::Now();
JS_LOG(startup, Info,
"Used source text for process self-hosted startup. Took %f us (%f us "
"XDR encode)",
(end - start).ToMicroseconds(), xdrDuration.ToMicroseconds());
return true;
}
void JSRuntime::setSelfHostingStencil(
MutableHandle<UniquePtr<frontend::CompilationInput>> input,
RefPtr<frontend::CompilationStencil>&& stencil) {
MOZ_ASSERT(!selfHostStencilInput_);
MOZ_ASSERT(!selfHostStencil_);
selfHostStencilInput_ = input.release();
selfHostStencil_ = stencil.forget().take();
#ifdef DEBUG
CheckSelfHostingDataIsTenured(this);
#endif
}
bool JSRuntime::initSelfHostingFromStencil(JSContext* cx) {
return InitSelfHostingFromStencil(
cx, cx->runtime()->selfHostStencilInput_->atomCache,
*cx->runtime()->selfHostStencil_);
}
void JSRuntime::finishSelfHosting() {
if (!parentRuntime) {
js_delete(selfHostStencilInput_.ref());
if (selfHostStencil_) {
// delete selfHostStencil_ by decrementing the ref-count of the last
// instance.
RefPtr<frontend::CompilationStencil> stencil;
*getter_AddRefs(stencil) = selfHostStencil_;
MOZ_ASSERT(!stencil->hasMultipleReference());
}
}
selfHostStencilInput_ = nullptr;
selfHostStencil_ = nullptr;
selfHostScriptMap.ref().clear();
clearSelfHostedJitCache();
}
void JSRuntime::clearSelfHostedJitCache() {
for (auto iter = selfHostJitCache.ref().iter(); !iter.done(); iter.next()) {
jit::BaselineScript* baselineScript = iter.get().value();
jit::BaselineScript::Destroy(gcContext(), baselineScript);
}
selfHostJitCache.ref().clear();
}
void JSRuntime::traceSelfHostingStencil(JSTracer* trc) {
if (selfHostStencilInput_.ref()) {
selfHostStencilInput_->trace(trc);
}
selfHostScriptMap.ref().trace(trc);
selfHostJitCache.ref().trace(trc);
}
GeneratorKind JSRuntime::getSelfHostedFunctionGeneratorKind(
js::PropertyName* name) {
frontend::ScriptIndex index = getSelfHostedScriptIndexRange(name)->start;
auto flags = selfHostStencil().scriptExtra[index].immutableFlags;
return flags.hasFlag(js::ImmutableScriptFlagsEnum::IsGenerator)
? GeneratorKind::Generator
: GeneratorKind::NotGenerator;
}
// Returns the ScriptSourceObject to use for cloned self-hosted scripts in the
// current realm.
ScriptSourceObject* js::SelfHostingScriptSourceObject(JSContext* cx) {
return GlobalObject::getOrCreateSelfHostingScriptSourceObject(cx,
cx->global());
}
/* static */
ScriptSourceObject* GlobalObject::getOrCreateSelfHostingScriptSourceObject(
JSContext* cx, Handle<GlobalObject*> global) {
MOZ_ASSERT(cx->global() == global);
if (ScriptSourceObject* sso = global->data().selfHostingScriptSource) {
return sso;
}
CompileOptions options(cx);
FillSelfHostingCompileOptions(options);
RefPtr<ScriptSource> source(cx->new_<ScriptSource>());
if (!source) {
return nullptr;
}
Rooted<ScriptSourceObject*> sourceObject(cx);
{
AutoReportFrontendContext fc(cx);
if (!source->initFromOptions(&fc, options)) {
return nullptr;
}
sourceObject = ScriptSourceObject::create(cx, source.get());
if (!sourceObject) {
return nullptr;
}
JS::InstantiateOptions instantiateOptions(options);
if (!ScriptSourceObject::initFromOptions(cx, sourceObject,
instantiateOptions)) {
return nullptr;
}
global->data().selfHostingScriptSource.init(sourceObject);
}
return sourceObject;
}
bool JSRuntime::delazifySelfHostedFunction(JSContext* cx,
Handle<PropertyName*> name,
HandleFunction targetFun) {
MOZ_ASSERT(targetFun->isExtended());
MOZ_ASSERT(targetFun->hasSelfHostedLazyScript());
auto indexRange = *getSelfHostedScriptIndexRange(name);
auto& stencil = cx->runtime()->selfHostStencil();
if (!stencil.delazifySelfHostedFunction(
cx, cx->runtime()->selfHostStencilInput().atomCache, indexRange, name,
targetFun)) {
return false;
}
// Relazifiable self-hosted functions may be relazified later into a
// SelfHostedLazyScript, dropping the BaseScript entirely. This only applies
// to named function being delazified. Inner functions used by self-hosting
// are never relazified.
BaseScript* targetScript = targetFun->baseScript();
if (targetScript->isRelazifiable()) {
targetScript->setAllowRelazify();
}
return true;
}
mozilla::Maybe<frontend::ScriptIndexRange>
JSRuntime::getSelfHostedScriptIndexRange(js::PropertyName* name) {
if (parentRuntime) {
return parentRuntime->getSelfHostedScriptIndexRange(name);
}
MOZ_ASSERT(name->isPermanentAndMayBeShared());
if (auto ptr = selfHostScriptMap.ref().readonlyThreadsafeLookup(name)) {
return mozilla::Some(ptr->value());
}
return mozilla::Nothing();
}
static bool GetComputedIntrinsic(JSContext* cx, Handle<PropertyName*> name,
MutableHandleValue vp) {
// If the intrinsic was not in hardcoded set, run the top-level of the
// selfhosted script. This will generate values and call `SetIntrinsic` to
// save them on a special "computed intrinsics holder". We then can check for
// our required values and cache on the normal intrinsics holder.
Rooted<NativeObject*> computedIntrinsicsHolder(
cx, cx->global()->getComputedIntrinsicsHolder());
if (!computedIntrinsicsHolder) {
auto computedIntrinsicHolderGuard = mozilla::MakeScopeExit(
[cx]() { cx->global()->setComputedIntrinsicsHolder(nullptr); });
// Instantiate a script in current realm from the shared Stencil.
JSRuntime* runtime = cx->runtime();
RootedScript script(
cx, runtime->selfHostStencil().instantiateSelfHostedTopLevelForRealm(
cx, runtime->selfHostStencilInput()));
if (!script) {
return false;
}
// Attach the computed intrinsics holder to the global now to capture
// generated values.
computedIntrinsicsHolder =
NewPlainObjectWithProto(cx, nullptr, TenuredObject);
if (!computedIntrinsicsHolder) {
return false;
}
cx->global()->setComputedIntrinsicsHolder(computedIntrinsicsHolder);
// Disable the interrupt callback while executing the top-level script.
// This prevents recursive calls to GetComputedIntrinsic through the
// interrupt callback.
bool hadInterruptsDisabled = JS_DisableInterruptCallback(cx);
auto resetInterrupts = mozilla::MakeScopeExit(
[&]() { JS_ResetInterruptCallback(cx, hadInterruptsDisabled); });
// Attempt to execute the top-level script. If they fails to run to
// successful completion, throw away the holder to avoid a partial
// initialization state.
if (!JS_ExecuteScript(cx, script)) {
return false;
}
// Successfully ran the self-host top-level in current realm, so these
// computed intrinsic values are now source of truth for the realm.
computedIntrinsicHolderGuard.release();
}
// Cache the individual intrinsic on the standard holder object so that we
// only have to look for it in one place when performing `GetIntrinsic`.
mozilla::Maybe<PropertyInfo> prop =
computedIntrinsicsHolder->lookup(cx, name);
#ifdef DEBUG
if (!prop) {
Fprinter out(stderr);
out.printf("SelfHosted intrinsic not found: ");
name->dumpPropertyName(out);
out.printf("\n");
}
#endif
MOZ_RELEASE_ASSERT(prop, "SelfHosted intrinsic not found");
RootedValue value(cx, computedIntrinsicsHolder->getSlot(prop->slot()));
return GlobalObject::addIntrinsicValue(cx, cx->global(), name, value);
}
bool JSRuntime::getSelfHostedValue(JSContext* cx, Handle<PropertyName*> name,
MutableHandleValue vp) {
// If the self-hosted value we want is a function in the stencil, instantiate
// a lazy self-hosted function for it. This is typical when a self-hosted
// function calls other self-hosted helper functions.
if (auto index = getSelfHostedScriptIndexRange(name)) {
JSFunction* fun =
cx->runtime()->selfHostStencil().instantiateSelfHostedLazyFunction(
cx, cx->runtime()->selfHostStencilInput().atomCache, index->start,
name);
if (!fun) {
return false;
}
vp.setObject(*fun);
return true;
}
return GetComputedIntrinsic(cx, name, vp);
}
void JSRuntime::assertSelfHostedFunctionHasCanonicalName(
Handle<PropertyName*> name) {
#ifdef DEBUG
frontend::ScriptIndex index = getSelfHostedScriptIndexRange(name)->start;
MOZ_ASSERT(selfHostStencil().scriptData[index].hasSelfHostedCanonicalName());
#endif
}
bool js::IsSelfHostedFunctionWithName(JSFunction* fun, JSAtom* name) {
return fun->isSelfHostedBuiltin() && fun->isExtended() &&
GetClonedSelfHostedFunctionName(fun) == name;
}
bool js::IsSelfHostedFunctionWithName(const Value& v, JSAtom* name) {
if (!v.isObject() || !v.toObject().is<JSFunction>()) {
return false;
}
JSFunction* fun = &v.toObject().as<JSFunction>();
return IsSelfHostedFunctionWithName(fun, name);
}
static_assert(
JSString::MAX_LENGTH <= INT32_MAX,
"StringIteratorNext in builtin/String.js assumes the stored index "
"into the string is an Int32Value");
static_assert(JSString::MAX_LENGTH == MAX_STRING_LENGTH,
"JSString::MAX_LENGTH matches self-hosted constant for maximum "
"string length");
static_assert(ARGS_LENGTH_MAX == MAX_ARGS_LENGTH,
"ARGS_LENGTH_MAX matches self-hosted constant for maximum "
"arguments length");
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