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Diffstat (limited to 'js/src/jsfriendapi.cpp')
| -rw-r--r-- | js/src/jsfriendapi.cpp | 847 |
1 files changed, 847 insertions, 0 deletions
diff --git a/js/src/jsfriendapi.cpp b/js/src/jsfriendapi.cpp new file mode 100644 index 0000000000..4fb2c99a1e --- /dev/null +++ b/js/src/jsfriendapi.cpp @@ -0,0 +1,847 @@ +/* -*- 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(); +} |