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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
#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/ColumnNumber.h" // JS::LimitedColumnNumberOneOrigin
#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/Watchtower.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(js::Nursery* nursery)
: nursery_(nursery), zone_(nullptr), realm_(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::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 JSFunction* js::NewFunctionByIdWithReservedAndProto(
JSContext* cx, JSNative native, HandleObject proto, unsigned nargs,
unsigned flags, jsid id) {
MOZ_ASSERT(id.isAtom());
MOZ_ASSERT(!cx->zone()->isAtomsZone());
MOZ_ASSERT(native);
CHECK_THREAD(cx);
cx->check(id);
Rooted<JSAtom*> atom(cx, id.toAtom());
FunctionFlags funflags = (flags & JSFUN_CONSTRUCTOR)
? FunctionFlags::NATIVE_CTOR
: FunctionFlags::NATIVE_FUN;
return NewFunctionWithProto(cx, native, nargs, funflags, nullptr, atom, proto,
gc::AllocKind::FUNCTION_EXTENDED, TenuredObject);
}
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 do not currently support watching reserved object slots for
// property modification.
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,
JS::LimitedColumnNumberOneOrigin* 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();
}