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-rw-r--r--js/src/jsfriendapi.cpp847
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diff --git a/js/src/jsfriendapi.cpp b/js/src/jsfriendapi.cpp
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+++ b/js/src/jsfriendapi.cpp
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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 "jsfriendapi.h"
+
+#include "mozilla/Maybe.h"
+#include "mozilla/PodOperations.h"
+#include "mozilla/TimeStamp.h"
+
+#include <stdint.h>
+
+#include "builtin/BigInt.h"
+#include "builtin/MapObject.h"
+#include "builtin/TestingFunctions.h"
+#include "frontend/FrontendContext.h" // FrontendContext
+#include "gc/PublicIterators.h"
+#include "gc/WeakMap.h"
+#include "js/experimental/CodeCoverage.h"
+#include "js/experimental/CTypes.h" // JS::AutoCTypesActivityCallback, JS::SetCTypesActivityCallback
+#include "js/experimental/Intl.h" // JS::AddMoz{DateTimeFormat,DisplayNames}Constructor
+#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_*
+#include "js/friend/StackLimits.h" // JS_STACK_GROWTH_DIRECTION
+#include "js/friend/WindowProxy.h" // js::ToWindowIfWindowProxy
+#include "js/HashTable.h"
+#include "js/Object.h" // JS::GetClass
+#include "js/PropertyAndElement.h" // JS_DefineProperty
+#include "js/Proxy.h"
+#include "js/Stack.h" // JS::NativeStackLimitMax
+#include "js/String.h" // JS::detail::StringToLinearStringSlow
+#include "js/Wrapper.h"
+#include "proxy/DeadObjectProxy.h"
+#include "util/Poison.h"
+#include "vm/ArgumentsObject.h"
+#include "vm/BooleanObject.h"
+#include "vm/DateObject.h"
+#include "vm/ErrorObject.h"
+#include "vm/Interpreter.h"
+#include "vm/JSContext.h"
+#include "vm/JSObject.h"
+#include "vm/NumberObject.h"
+#include "vm/PlainObject.h" // js::PlainObject
+#include "vm/PromiseObject.h" // js::PromiseObject
+#include "vm/Realm.h"
+#include "vm/StringObject.h"
+#include "vm/WrapperObject.h"
+#ifdef ENABLE_RECORD_TUPLE
+# include "vm/RecordType.h"
+# include "vm/TupleType.h"
+#endif
+
+#include "gc/Marking-inl.h"
+#include "vm/Compartment-inl.h" // JS::Compartment::wrap
+#include "vm/JSObject-inl.h"
+#include "vm/JSScript-inl.h"
+#include "vm/Realm-inl.h"
+
+using namespace js;
+
+using mozilla::PodArrayZero;
+
+JS::RootingContext::RootingContext() : realm_(nullptr), zone_(nullptr) {
+ for (auto& listHead : stackRoots_) {
+ listHead = nullptr;
+ }
+ for (auto& listHead : autoGCRooters_) {
+ listHead = nullptr;
+ }
+
+#if JS_STACK_GROWTH_DIRECTION > 0
+ for (int i = 0; i < StackKindCount; i++) {
+ nativeStackLimit[i] = JS::NativeStackLimitMax;
+ }
+#else
+ static_assert(JS::NativeStackLimitMax == 0);
+ PodArrayZero(nativeStackLimit);
+#endif
+}
+
+JS_PUBLIC_API void JS_SetGrayGCRootsTracer(JSContext* cx,
+ JSGrayRootsTracer traceOp,
+ void* data) {
+ cx->runtime()->gc.setGrayRootsTracer(traceOp, data);
+}
+
+JS_PUBLIC_API JSObject* JS_FindCompilationScope(JSContext* cx,
+ HandleObject objArg) {
+ cx->check(objArg);
+
+ RootedObject obj(cx, objArg);
+
+ /*
+ * We unwrap wrappers here. This is a little weird, but it's what's being
+ * asked of us.
+ */
+ if (obj->is<WrapperObject>()) {
+ obj = UncheckedUnwrap(obj);
+ }
+
+ /*
+ * Get the Window if `obj` is a WindowProxy so that we compile in the
+ * correct (global) scope.
+ */
+ return ToWindowIfWindowProxy(obj);
+}
+
+JS_PUBLIC_API JSFunction* JS_GetObjectFunction(JSObject* obj) {
+ if (obj->is<JSFunction>()) {
+ return &obj->as<JSFunction>();
+ }
+ return nullptr;
+}
+
+JS_PUBLIC_API JSObject* JS_NewObjectWithoutMetadata(
+ JSContext* cx, const JSClass* clasp, JS::Handle<JSObject*> proto) {
+ cx->check(proto);
+ AutoSuppressAllocationMetadataBuilder suppressMetadata(cx);
+ return JS_NewObjectWithGivenProto(cx, clasp, proto);
+}
+
+JS_PUBLIC_API bool JS::GetIsSecureContext(JS::Realm* realm) {
+ return realm->creationOptions().secureContext();
+}
+
+JS_PUBLIC_API JSPrincipals* JS::GetRealmPrincipals(JS::Realm* realm) {
+ return realm->principals();
+}
+
+JS_PUBLIC_API bool JS::GetDebuggerObservesWasm(JS::Realm* realm) {
+ return realm->debuggerObservesAsmJS();
+}
+
+JS_PUBLIC_API void JS::SetRealmPrincipals(JS::Realm* realm,
+ JSPrincipals* principals) {
+ // Short circuit if there's no change.
+ if (principals == realm->principals()) {
+ return;
+ }
+
+ // We'd like to assert that our new principals is always same-origin
+ // with the old one, but JSPrincipals doesn't give us a way to do that.
+ // But we can at least assert that we're not switching between system
+ // and non-system.
+ const JSPrincipals* trusted =
+ realm->runtimeFromMainThread()->trustedPrincipals();
+ bool isSystem = principals && principals == trusted;
+ MOZ_RELEASE_ASSERT(realm->isSystem() == isSystem);
+
+ // Clear out the old principals, if any.
+ if (realm->principals()) {
+ JS_DropPrincipals(TlsContext.get(), realm->principals());
+ realm->setPrincipals(nullptr);
+ }
+
+ // Set up the new principals.
+ if (principals) {
+ JS_HoldPrincipals(principals);
+ realm->setPrincipals(principals);
+ }
+}
+
+JS_PUBLIC_API JSPrincipals* JS_GetScriptPrincipals(JSScript* script) {
+ return script->principals();
+}
+
+JS_PUBLIC_API bool JS_ScriptHasMutedErrors(JSScript* script) {
+ return script->mutedErrors();
+}
+
+JS_PUBLIC_API bool JS_WrapPropertyDescriptor(
+ JSContext* cx, JS::MutableHandle<JS::PropertyDescriptor> desc) {
+ return cx->compartment()->wrap(cx, desc);
+}
+
+JS_PUBLIC_API bool JS_WrapPropertyDescriptor(
+ JSContext* cx,
+ JS::MutableHandle<mozilla::Maybe<JS::PropertyDescriptor>> desc) {
+ return cx->compartment()->wrap(cx, desc);
+}
+
+JS_PUBLIC_API void JS_TraceShapeCycleCollectorChildren(JS::CallbackTracer* trc,
+ JS::GCCellPtr shape) {
+ MOZ_ASSERT(shape.is<Shape>());
+ TraceCycleCollectorChildren(trc, &shape.as<Shape>());
+}
+
+static bool DefineHelpProperty(JSContext* cx, HandleObject obj,
+ const char* prop, const char* value) {
+ Rooted<JSAtom*> atom(cx, Atomize(cx, value, strlen(value)));
+ if (!atom) {
+ return false;
+ }
+ return JS_DefineProperty(cx, obj, prop, atom,
+ JSPROP_READONLY | JSPROP_PERMANENT);
+}
+
+JS_PUBLIC_API bool JS_DefineFunctionsWithHelp(
+ JSContext* cx, HandleObject obj, const JSFunctionSpecWithHelp* fs) {
+ MOZ_ASSERT(!cx->zone()->isAtomsZone());
+
+ CHECK_THREAD(cx);
+ cx->check(obj);
+ for (; fs->name; fs++) {
+ JSAtom* atom = Atomize(cx, fs->name, strlen(fs->name));
+ if (!atom) {
+ return false;
+ }
+
+ Rooted<jsid> id(cx, AtomToId(atom));
+ RootedFunction fun(cx, DefineFunction(cx, obj, id, fs->call, fs->nargs,
+ fs->flags | JSPROP_RESOLVING));
+ if (!fun) {
+ return false;
+ }
+
+ if (fs->jitInfo) {
+ fun->setJitInfo(fs->jitInfo);
+ }
+
+ if (fs->usage) {
+ if (!DefineHelpProperty(cx, fun, "usage", fs->usage)) {
+ return false;
+ }
+ }
+
+ if (fs->help) {
+ if (!DefineHelpProperty(cx, fun, "help", fs->help)) {
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+JS_PUBLIC_API bool JS::GetBuiltinClass(JSContext* cx, HandleObject obj,
+ js::ESClass* cls) {
+ if (MOZ_UNLIKELY(obj->is<ProxyObject>())) {
+ return Proxy::getBuiltinClass(cx, obj, cls);
+ }
+
+ if (obj->is<PlainObject>()) {
+ *cls = ESClass::Object;
+ } else if (obj->is<ArrayObject>()) {
+ *cls = ESClass::Array;
+ } else if (obj->is<NumberObject>()) {
+ *cls = ESClass::Number;
+ } else if (obj->is<StringObject>()) {
+ *cls = ESClass::String;
+ } else if (obj->is<BooleanObject>()) {
+ *cls = ESClass::Boolean;
+ } else if (obj->is<RegExpObject>()) {
+ *cls = ESClass::RegExp;
+ } else if (obj->is<ArrayBufferObject>()) {
+ *cls = ESClass::ArrayBuffer;
+ } else if (obj->is<SharedArrayBufferObject>()) {
+ *cls = ESClass::SharedArrayBuffer;
+ } else if (obj->is<DateObject>()) {
+ *cls = ESClass::Date;
+ } else if (obj->is<SetObject>()) {
+ *cls = ESClass::Set;
+ } else if (obj->is<MapObject>()) {
+ *cls = ESClass::Map;
+ } else if (obj->is<PromiseObject>()) {
+ *cls = ESClass::Promise;
+ } else if (obj->is<MapIteratorObject>()) {
+ *cls = ESClass::MapIterator;
+ } else if (obj->is<SetIteratorObject>()) {
+ *cls = ESClass::SetIterator;
+ } else if (obj->is<ArgumentsObject>()) {
+ *cls = ESClass::Arguments;
+ } else if (obj->is<ErrorObject>()) {
+ *cls = ESClass::Error;
+ } else if (obj->is<BigIntObject>()) {
+ *cls = ESClass::BigInt;
+#ifdef ENABLE_RECORD_TUPLE
+ } else if (obj->is<RecordType>()) {
+ *cls = ESClass::Record;
+ } else if (obj->is<TupleType>()) {
+ *cls = ESClass::Tuple;
+#endif
+ } else if (obj->is<JSFunction>()) {
+ *cls = ESClass::Function;
+ } else {
+ *cls = ESClass::Other;
+ }
+
+ return true;
+}
+
+JS_PUBLIC_API bool js::IsArgumentsObject(HandleObject obj) {
+ return obj->is<ArgumentsObject>();
+}
+
+JS_PUBLIC_API JS::Zone* js::GetRealmZone(JS::Realm* realm) {
+ return realm->zone();
+}
+
+JS_PUBLIC_API bool js::IsSystemCompartment(JS::Compartment* comp) {
+ // Realms in the same compartment must either all be system realms or
+ // non-system realms. We assert this in NewRealm and SetRealmPrincipals,
+ // but do an extra sanity check here.
+ MOZ_ASSERT(comp->realms()[0]->isSystem() ==
+ comp->realms().back()->isSystem());
+ return comp->realms()[0]->isSystem();
+}
+
+JS_PUBLIC_API bool js::IsSystemRealm(JS::Realm* realm) {
+ return realm->isSystem();
+}
+
+JS_PUBLIC_API bool js::IsSystemZone(Zone* zone) { return zone->isSystemZone(); }
+
+JS_PUBLIC_API bool js::IsFunctionObject(JSObject* obj) {
+ return obj->is<JSFunction>();
+}
+
+JS_PUBLIC_API bool js::IsSavedFrame(JSObject* obj) {
+ return obj->is<SavedFrame>();
+}
+
+JS_PUBLIC_API bool js::UninlinedIsCrossCompartmentWrapper(const JSObject* obj) {
+ return js::IsCrossCompartmentWrapper(obj);
+}
+
+JS_PUBLIC_API void js::AssertSameCompartment(JSContext* cx, JSObject* obj) {
+ cx->check(obj);
+}
+
+JS_PUBLIC_API void js::AssertSameCompartment(JSContext* cx, JS::HandleValue v) {
+ cx->check(v);
+}
+
+#ifdef DEBUG
+JS_PUBLIC_API void js::AssertSameCompartment(JSObject* objA, JSObject* objB) {
+ MOZ_ASSERT(objA->compartment() == objB->compartment());
+}
+#endif
+
+JS_PUBLIC_API void js::NotifyAnimationActivity(JSObject* obj) {
+ MOZ_ASSERT(obj->is<GlobalObject>());
+
+ auto timeNow = mozilla::TimeStamp::Now();
+ obj->as<GlobalObject>().realm()->lastAnimationTime = timeNow;
+ obj->runtimeFromMainThread()->lastAnimationTime = timeNow;
+}
+
+JS_PUBLIC_API bool js::IsObjectInContextCompartment(JSObject* obj,
+ const JSContext* cx) {
+ return obj->compartment() == cx->compartment();
+}
+
+JS_PUBLIC_API JS::StackKind
+js::AutoCheckRecursionLimit::stackKindForCurrentPrincipal(JSContext* cx) const {
+ return cx->stackKindForCurrentPrincipal();
+}
+
+JS_PUBLIC_API void js::AutoCheckRecursionLimit::assertMainThread(
+ JSContext* cx) const {
+ MOZ_ASSERT(cx->isMainThreadContext());
+}
+
+JS::NativeStackLimit AutoCheckRecursionLimit::getStackLimit(
+ FrontendContext* fc) const {
+ return fc->stackLimit();
+}
+
+JS_PUBLIC_API JSFunction* js::DefineFunctionWithReserved(
+ JSContext* cx, JSObject* objArg, const char* name, JSNative call,
+ unsigned nargs, unsigned attrs) {
+ RootedObject obj(cx, objArg);
+ MOZ_ASSERT(!cx->zone()->isAtomsZone());
+ CHECK_THREAD(cx);
+ cx->check(obj);
+ JSAtom* atom = Atomize(cx, name, strlen(name));
+ if (!atom) {
+ return nullptr;
+ }
+ Rooted<jsid> id(cx, AtomToId(atom));
+ return DefineFunction(cx, obj, id, call, nargs, attrs,
+ gc::AllocKind::FUNCTION_EXTENDED);
+}
+
+JS_PUBLIC_API JSFunction* js::NewFunctionWithReserved(JSContext* cx,
+ JSNative native,
+ unsigned nargs,
+ unsigned flags,
+ const char* name) {
+ MOZ_ASSERT(!cx->zone()->isAtomsZone());
+
+ CHECK_THREAD(cx);
+
+ Rooted<JSAtom*> atom(cx);
+ if (name) {
+ atom = Atomize(cx, name, strlen(name));
+ if (!atom) {
+ return nullptr;
+ }
+ }
+
+ return (flags & JSFUN_CONSTRUCTOR)
+ ? NewNativeConstructor(cx, native, nargs, atom,
+ gc::AllocKind::FUNCTION_EXTENDED)
+ : NewNativeFunction(cx, native, nargs, atom,
+ gc::AllocKind::FUNCTION_EXTENDED);
+}
+
+JS_PUBLIC_API JSFunction* js::NewFunctionByIdWithReserved(
+ JSContext* cx, JSNative native, unsigned nargs, unsigned flags, jsid id) {
+ MOZ_ASSERT(id.isAtom());
+ MOZ_ASSERT(!cx->zone()->isAtomsZone());
+ CHECK_THREAD(cx);
+ cx->check(id);
+
+ Rooted<JSAtom*> atom(cx, id.toAtom());
+ return (flags & JSFUN_CONSTRUCTOR)
+ ? NewNativeConstructor(cx, native, nargs, atom,
+ gc::AllocKind::FUNCTION_EXTENDED)
+ : NewNativeFunction(cx, native, nargs, atom,
+ gc::AllocKind::FUNCTION_EXTENDED);
+}
+
+JS_PUBLIC_API const Value& js::GetFunctionNativeReserved(JSObject* fun,
+ size_t which) {
+ MOZ_ASSERT(fun->as<JSFunction>().isNativeFun());
+ return fun->as<JSFunction>().getExtendedSlot(which);
+}
+
+JS_PUBLIC_API void js::SetFunctionNativeReserved(JSObject* fun, size_t which,
+ const Value& val) {
+ MOZ_ASSERT(fun->as<JSFunction>().isNativeFun());
+ MOZ_ASSERT_IF(val.isObject(),
+ val.toObject().compartment() == fun->compartment());
+ fun->as<JSFunction>().setExtendedSlot(which, val);
+}
+
+JS_PUBLIC_API bool js::FunctionHasNativeReserved(JSObject* fun) {
+ MOZ_ASSERT(fun->as<JSFunction>().isNativeFun());
+ return fun->as<JSFunction>().isExtended();
+}
+
+bool js::GetObjectProto(JSContext* cx, JS::Handle<JSObject*> obj,
+ JS::MutableHandle<JSObject*> proto) {
+ cx->check(obj);
+
+ if (obj->is<ProxyObject>()) {
+ return JS_GetPrototype(cx, obj, proto);
+ }
+
+ proto.set(obj->staticPrototype());
+ return true;
+}
+
+JS_PUBLIC_API JSObject* js::GetStaticPrototype(JSObject* obj) {
+ MOZ_ASSERT(obj->hasStaticPrototype());
+ return obj->staticPrototype();
+}
+
+JS_PUBLIC_API bool js::GetRealmOriginalEval(JSContext* cx,
+ MutableHandleObject eval) {
+ eval.set(&cx->global()->getEvalFunction());
+ return true;
+}
+
+void JS::detail::SetReservedSlotWithBarrier(JSObject* obj, size_t slot,
+ const Value& value) {
+ if (obj->is<ProxyObject>()) {
+ obj->as<ProxyObject>().setReservedSlot(slot, value);
+ } else {
+ // Note: we don't use setReservedSlot so that this also works on swappable
+ // DOM objects. See NativeObject::getReservedSlotRef comment.
+ obj->as<NativeObject>().setSlot(slot, value);
+ }
+}
+
+void js::SetPreserveWrapperCallbacks(
+ JSContext* cx, PreserveWrapperCallback preserveWrapper,
+ HasReleasedWrapperCallback hasReleasedWrapper) {
+ cx->runtime()->preserveWrapperCallback = preserveWrapper;
+ cx->runtime()->hasReleasedWrapperCallback = hasReleasedWrapper;
+}
+
+JS_PUBLIC_API unsigned JS_PCToLineNumber(JSScript* script, jsbytecode* pc,
+ unsigned* columnp) {
+ return PCToLineNumber(script, pc, columnp);
+}
+
+JS_PUBLIC_API bool JS_IsDeadWrapper(JSObject* obj) {
+ return IsDeadProxyObject(obj);
+}
+
+JS_PUBLIC_API JSObject* JS_NewDeadWrapper(JSContext* cx, JSObject* origObj) {
+ return NewDeadProxyObject(cx, origObj);
+}
+
+void js::TraceWeakMaps(WeakMapTracer* trc) {
+ WeakMapBase::traceAllMappings(trc);
+}
+
+extern JS_PUBLIC_API bool js::AreGCGrayBitsValid(JSRuntime* rt) {
+ return rt->gc.areGrayBitsValid();
+}
+
+JS_PUBLIC_API bool js::ZoneGlobalsAreAllGray(JS::Zone* zone) {
+ for (RealmsInZoneIter realm(zone); !realm.done(); realm.next()) {
+ JSObject* obj = realm->unsafeUnbarrieredMaybeGlobal();
+ if (!obj || !JS::ObjectIsMarkedGray(obj)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+JS_PUBLIC_API bool js::IsCompartmentZoneSweepingOrCompacting(
+ JS::Compartment* comp) {
+ MOZ_ASSERT(comp);
+ return comp->zone()->isGCSweepingOrCompacting();
+}
+
+JS_PUBLIC_API void js::TraceGrayWrapperTargets(JSTracer* trc, Zone* zone) {
+ JS::AutoSuppressGCAnalysis nogc;
+
+ for (CompartmentsInZoneIter comp(zone); !comp.done(); comp.next()) {
+ for (Compartment::ObjectWrapperEnum e(comp); !e.empty(); e.popFront()) {
+ JSObject* target = e.front().key();
+ if (target->isMarkedGray()) {
+ TraceManuallyBarrieredEdge(trc, &target, "gray CCW target");
+ MOZ_ASSERT(target == e.front().key());
+ }
+ }
+ }
+}
+
+JSLinearString* JS::detail::StringToLinearStringSlow(JSContext* cx,
+ JSString* str) {
+ return str->ensureLinear(cx);
+}
+
+static bool CopyProxyObject(JSContext* cx, Handle<ProxyObject*> from,
+ Handle<ProxyObject*> to) {
+ MOZ_ASSERT(from->getClass() == to->getClass());
+
+ if (from->is<WrapperObject>() &&
+ (Wrapper::wrapperHandler(from)->flags() & Wrapper::CROSS_COMPARTMENT)) {
+ to->setCrossCompartmentPrivate(GetProxyPrivate(from));
+ } else {
+ RootedValue v(cx, GetProxyPrivate(from));
+ if (!cx->compartment()->wrap(cx, &v)) {
+ return false;
+ }
+ to->setSameCompartmentPrivate(v);
+ }
+
+ MOZ_ASSERT(from->numReservedSlots() == to->numReservedSlots());
+
+ RootedValue v(cx);
+ for (size_t n = 0; n < from->numReservedSlots(); n++) {
+ v = GetProxyReservedSlot(from, n);
+ if (!cx->compartment()->wrap(cx, &v)) {
+ return false;
+ }
+ SetProxyReservedSlot(to, n, v);
+ }
+
+ return true;
+}
+
+JS_PUBLIC_API JSObject* JS_CloneObject(JSContext* cx, HandleObject obj,
+ HandleObject proto) {
+ // |obj| might be in a different compartment.
+ cx->check(proto);
+
+ if (!obj->is<NativeObject>() && !obj->is<ProxyObject>()) {
+ JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
+ JSMSG_CANT_CLONE_OBJECT);
+ return nullptr;
+ }
+
+ RootedObject clone(cx);
+ if (obj->is<NativeObject>()) {
+ clone = NewObjectWithGivenProto(cx, obj->getClass(), proto);
+ if (!clone) {
+ return nullptr;
+ }
+
+ if (clone->is<JSFunction>() && obj->compartment() != clone->compartment()) {
+ JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
+ JSMSG_CANT_CLONE_OBJECT);
+ return nullptr;
+ }
+ } else {
+ auto* handler = GetProxyHandler(obj);
+ clone = ProxyObject::New(cx, handler, JS::NullHandleValue,
+ AsTaggedProto(proto), obj->getClass());
+ if (!clone) {
+ return nullptr;
+ }
+
+ if (!CopyProxyObject(cx, obj.as<ProxyObject>(), clone.as<ProxyObject>())) {
+ return nullptr;
+ }
+ }
+
+ return clone;
+}
+
+extern JS_PUBLIC_API bool JS::ForceLexicalInitialization(JSContext* cx,
+ HandleObject obj) {
+ AssertHeapIsIdle();
+ CHECK_THREAD(cx);
+ cx->check(obj);
+
+ bool initializedAny = false;
+ NativeObject* nobj = &obj->as<NativeObject>();
+
+ for (ShapePropertyIter<NoGC> iter(nobj->shape()); !iter.done(); iter++) {
+ Value v = nobj->getSlot(iter->slot());
+ if (iter->isDataProperty() && v.isMagic() &&
+ v.whyMagic() == JS_UNINITIALIZED_LEXICAL) {
+ nobj->setSlot(iter->slot(), UndefinedValue());
+ initializedAny = true;
+ }
+ }
+ return initializedAny;
+}
+
+extern JS_PUBLIC_API int JS::IsGCPoisoning() {
+#ifdef JS_GC_ALLOW_EXTRA_POISONING
+ return js::gExtraPoisoningEnabled;
+#else
+ return false;
+#endif
+}
+
+JS_PUBLIC_API void JS::NotifyGCRootsRemoved(JSContext* cx) {
+ cx->runtime()->gc.notifyRootsRemoved();
+}
+
+JS_PUBLIC_API JS::Realm* js::GetAnyRealmInZone(JS::Zone* zone) {
+ if (zone->isAtomsZone()) {
+ return nullptr;
+ }
+
+ RealmsInZoneIter realm(zone);
+ MOZ_ASSERT(!realm.done());
+ return realm.get();
+}
+
+JS_PUBLIC_API bool js::IsSharableCompartment(JS::Compartment* comp) {
+ // If this compartment has nuked outgoing wrappers (because all its globals
+ // got nuked), we won't be able to create any useful CCWs out of it in the
+ // future, and so we shouldn't use it for any new globals.
+ if (comp->nukedOutgoingWrappers) {
+ return false;
+ }
+
+ // If this compartment has no live globals, it might be in the middle of being
+ // GCed. Don't create any new Realms inside. There's no point to doing that
+ // anyway, since the idea would be to avoid CCWs from existing Realms in the
+ // compartment to the new Realm, and there are no existing Realms.
+ if (!CompartmentHasLiveGlobal(comp)) {
+ return false;
+ }
+
+ // Good to go.
+ return true;
+}
+
+JS_PUBLIC_API JSObject* js::GetTestingFunctions(JSContext* cx) {
+ RootedObject obj(cx, JS_NewPlainObject(cx));
+ if (!obj) {
+ return nullptr;
+ }
+
+ if (!DefineTestingFunctions(cx, obj, false, false)) {
+ return nullptr;
+ }
+
+ return obj;
+}
+
+JS_PUBLIC_API void js::SetDOMCallbacks(JSContext* cx,
+ const DOMCallbacks* callbacks) {
+ cx->runtime()->DOMcallbacks = callbacks;
+}
+
+JS_PUBLIC_API const DOMCallbacks* js::GetDOMCallbacks(JSContext* cx) {
+ return cx->runtime()->DOMcallbacks;
+}
+
+JS_PUBLIC_API void js::PrepareScriptEnvironmentAndInvoke(
+ JSContext* cx, HandleObject global,
+ ScriptEnvironmentPreparer::Closure& closure) {
+ MOZ_ASSERT(!cx->isExceptionPending());
+ MOZ_ASSERT(global->is<GlobalObject>());
+
+ MOZ_RELEASE_ASSERT(
+ cx->runtime()->scriptEnvironmentPreparer,
+ "Embedding needs to set a scriptEnvironmentPreparer callback");
+
+ cx->runtime()->scriptEnvironmentPreparer->invoke(global, closure);
+}
+
+JS_PUBLIC_API void js::SetScriptEnvironmentPreparer(
+ JSContext* cx, ScriptEnvironmentPreparer* preparer) {
+ cx->runtime()->scriptEnvironmentPreparer = preparer;
+}
+
+JS_PUBLIC_API void JS::SetCTypesActivityCallback(JSContext* cx,
+ CTypesActivityCallback cb) {
+ cx->runtime()->ctypesActivityCallback = cb;
+}
+
+JS::AutoCTypesActivityCallback::AutoCTypesActivityCallback(
+ JSContext* cx, CTypesActivityType beginType, CTypesActivityType endType)
+ : cx(cx),
+ callback(cx->runtime()->ctypesActivityCallback),
+ endType(endType) {
+ if (callback) {
+ callback(cx, beginType);
+ }
+}
+
+JS_PUBLIC_API void js::SetAllocationMetadataBuilder(
+ JSContext* cx, const AllocationMetadataBuilder* callback) {
+ cx->realm()->setAllocationMetadataBuilder(callback);
+}
+
+JS_PUBLIC_API JSObject* js::GetAllocationMetadata(JSObject* obj) {
+ ObjectWeakMap* map = ObjectRealm::get(obj).objectMetadataTable.get();
+ if (map) {
+ return map->lookup(obj);
+ }
+ return nullptr;
+}
+
+JS_PUBLIC_API bool js::ReportIsNotFunction(JSContext* cx, HandleValue v) {
+ cx->check(v);
+ return ReportIsNotFunction(cx, v, -1);
+}
+
+#ifdef DEBUG
+bool js::HasObjectMovedOp(JSObject* obj) {
+ return !!JS::GetClass(obj)->extObjectMovedOp();
+}
+#endif
+
+JS_PUBLIC_API bool js::ForwardToNative(JSContext* cx, JSNative native,
+ const CallArgs& args) {
+ return native(cx, args.length(), args.base());
+}
+
+AutoAssertNoContentJS::AutoAssertNoContentJS(JSContext* cx)
+ : context_(cx), prevAllowContentJS_(cx->runtime()->allowContentJS_) {
+ cx->runtime()->allowContentJS_ = false;
+}
+
+AutoAssertNoContentJS::~AutoAssertNoContentJS() {
+ context_->runtime()->allowContentJS_ = prevAllowContentJS_;
+}
+
+JS_PUBLIC_API void js::EnableCodeCoverage() { js::coverage::EnableLCov(); }
+
+JS_PUBLIC_API JS::Value js::MaybeGetScriptPrivate(JSObject* object) {
+ if (!object->is<ScriptSourceObject>()) {
+ return UndefinedValue();
+ }
+
+ return object->as<ScriptSourceObject>().getPrivate();
+}
+
+JS_PUBLIC_API uint64_t js::GetMemoryUsageForZone(Zone* zone) {
+ // We do not include zone->sharedMemoryUseCounts since that's already included
+ // in zone->mallocHeapSize.
+ return zone->gcHeapSize.bytes() + zone->mallocHeapSize.bytes() +
+ zone->jitHeapSize.bytes();
+}
+
+JS_PUBLIC_API const gc::SharedMemoryMap& js::GetSharedMemoryUsageForZone(
+ Zone* zone) {
+ return zone->sharedMemoryUseCounts;
+}
+
+JS_PUBLIC_API uint64_t js::GetGCHeapUsage(JSContext* cx) {
+ mozilla::CheckedInt<uint64_t> sum = 0;
+ using SharedSet = js::HashSet<void*, PointerHasher<void*>, SystemAllocPolicy>;
+ SharedSet sharedVisited;
+
+ for (ZonesIter zone(cx->runtime(), WithAtoms); !zone.done(); zone.next()) {
+ sum += GetMemoryUsageForZone(zone);
+
+ const gc::SharedMemoryMap& shared = GetSharedMemoryUsageForZone(zone);
+ for (auto iter = shared.iter(); !iter.done(); iter.next()) {
+ void* sharedMem = iter.get().key();
+ SharedSet::AddPtr addShared = sharedVisited.lookupForAdd(sharedMem);
+ if (addShared) {
+ // We *have* seen this shared memory before.
+
+ // Because shared memory is already included in
+ // GetMemoryUsageForZone() above, and we've seen it for a
+ // previous zone, we subtract it here so it's not counted more
+ // than once.
+ sum -= iter.get().value().nbytes;
+ } else if (!sharedVisited.add(addShared, sharedMem)) {
+ // OOM, abort counting (usually causing an over-estimate).
+ break;
+ }
+ }
+ }
+
+ MOZ_ASSERT(sum.isValid(), "Memory calculation under/over flowed");
+ return sum.value();
+}
+
+#ifdef DEBUG
+JS_PUBLIC_API bool js::RuntimeIsBeingDestroyed() {
+ JSRuntime* runtime = TlsContext.get()->runtime();
+ MOZ_ASSERT(js::CurrentThreadCanAccessRuntime(runtime));
+ return runtime->isBeingDestroyed();
+}
+#endif
+
+// No-op implementations of public API that would depend on --with-intl-api
+
+#ifndef JS_HAS_INTL_API
+
+static bool IntlNotEnabled(JSContext* cx) {
+ JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr,
+ JSMSG_SUPPORT_NOT_ENABLED, "Intl");
+ return false;
+}
+
+bool JS::AddMozDateTimeFormatConstructor(JSContext* cx, JS::HandleObject intl) {
+ return IntlNotEnabled(cx);
+}
+
+bool JS::AddMozDisplayNamesConstructor(JSContext* cx, JS::HandleObject intl) {
+ return IntlNotEnabled(cx);
+}
+
+#endif // !JS_HAS_INTL_API
+
+JS_PUBLIC_API JS::Zone* js::GetObjectZoneFromAnyThread(const JSObject* obj) {
+ return MaybeForwarded(obj)->zoneFromAnyThread();
+}