Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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();
+}