diff -r 000000000000 -r 6474c204b198 js/src/jsfriendapi.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jsfriendapi.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,1262 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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/PodOperations.h"
+
+#include <stdint.h>
+
+#include "jscntxt.h"
+#include "jscompartment.h"
+#include "jsgc.h"
+#include "jsobj.h"
+#include "jsproxy.h"
+#include "jswatchpoint.h"
+#include "jsweakmap.h"
+#include "jswrapper.h"
+#include "prmjtime.h"
+
+#include "builtin/TestingFunctions.h"
+#include "vm/WrapperObject.h"
+
+#include "jsobjinlines.h"
+
+#include "vm/ScopeObject-inl.h"
+
+using namespace js;
+using namespace JS;
+
+using mozilla::PodArrayZero;
+
+// Required by PerThreadDataFriendFields::getMainThread()
+JS_STATIC_ASSERT(offsetof(JSRuntime, mainThread) ==
+                 PerThreadDataFriendFields::RuntimeMainThreadOffset);
+
+PerThreadDataFriendFields::PerThreadDataFriendFields()
+{
+    PodArrayZero(nativeStackLimit);
+#if JS_STACK_GROWTH_DIRECTION > 0
+    for (int i=0; i<StackKindCount; i++)
+        nativeStackLimit[i] = UINTPTR_MAX;
+#endif
+#if defined(JSGC_USE_EXACT_ROOTING)
+    PodArrayZero(thingGCRooters);
+#endif
+}
+
+JS_FRIEND_API(void)
+js::SetSourceHook(JSRuntime *rt, SourceHook *hook)
+{
+    rt->sourceHook = hook;
+}
+
+JS_FRIEND_API(SourceHook *)
+js::ForgetSourceHook(JSRuntime *rt)
+{
+    return rt->sourceHook.forget();
+}
+
+JS_FRIEND_API(void)
+JS_SetGrayGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
+{
+    rt->gcGrayRootTracer.op = traceOp;
+    rt->gcGrayRootTracer.data = data;
+}
+
+JS_FRIEND_API(JSString *)
+JS_GetAnonymousString(JSRuntime *rt)
+{
+    JS_ASSERT(rt->hasContexts());
+    return rt->commonNames->anonymous;
+}
+
+JS_FRIEND_API(void)
+JS_SetIsWorkerRuntime(JSRuntime *rt)
+{
+    rt->setIsWorkerRuntime();
+}
+
+JS_FRIEND_API(JSObject *)
+JS_FindCompilationScope(JSContext *cx, HandleObject 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);
+
+    /*
+     * Innerize the target_obj so that we compile in the correct (inner)
+     * scope.
+     */
+    if (JSObjectOp op = obj->getClass()->ext.innerObject)
+        obj = op(cx, obj);
+    return obj;
+}
+
+JS_FRIEND_API(JSFunction *)
+JS_GetObjectFunction(JSObject *obj)
+{
+    if (obj->is<JSFunction>())
+        return &obj->as<JSFunction>();
+    return nullptr;
+}
+
+JS_FRIEND_API(bool)
+JS_SplicePrototype(JSContext *cx, HandleObject obj, HandleObject proto)
+{
+    /*
+     * Change the prototype of an object which hasn't been used anywhere
+     * and does not share its type with another object. Unlike JS_SetPrototype,
+     * does not nuke type information for the object.
+     */
+    CHECK_REQUEST(cx);
+
+    if (!obj->hasSingletonType()) {
+        /*
+         * We can see non-singleton objects when trying to splice prototypes
+         * due to mutable __proto__ (ugh).
+         */
+        return JS_SetPrototype(cx, obj, proto);
+    }
+
+    Rooted<TaggedProto> tagged(cx, TaggedProto(proto));
+    return obj->splicePrototype(cx, obj->getClass(), tagged);
+}
+
+JS_FRIEND_API(JSObject *)
+JS_NewObjectWithUniqueType(JSContext *cx, const JSClass *clasp, HandleObject proto,
+                           HandleObject parent)
+{
+    /*
+     * Create our object with a null proto and then splice in the correct proto
+     * after we setSingletonType, so that we don't pollute the default
+     * TypeObject attached to our proto with information about our object, since
+     * we're not going to be using that TypeObject anyway.
+     */
+    RootedObject obj(cx, NewObjectWithGivenProto(cx, (const js::Class *)clasp, nullptr,
+                                                 parent, SingletonObject));
+    if (!obj)
+        return nullptr;
+    if (!JS_SplicePrototype(cx, obj, proto))
+        return nullptr;
+    return obj;
+}
+
+JS_FRIEND_API(void)
+JS::PrepareZoneForGC(Zone *zone)
+{
+    zone->scheduleGC();
+}
+
+JS_FRIEND_API(void)
+JS::PrepareForFullGC(JSRuntime *rt)
+{
+    for (ZonesIter zone(rt, WithAtoms); !zone.done(); zone.next())
+        zone->scheduleGC();
+}
+
+JS_FRIEND_API(void)
+JS::PrepareForIncrementalGC(JSRuntime *rt)
+{
+    if (!JS::IsIncrementalGCInProgress(rt))
+        return;
+
+    for (ZonesIter zone(rt, WithAtoms); !zone.done(); zone.next()) {
+        if (zone->wasGCStarted())
+            PrepareZoneForGC(zone);
+    }
+}
+
+JS_FRIEND_API(bool)
+JS::IsGCScheduled(JSRuntime *rt)
+{
+    for (ZonesIter zone(rt, WithAtoms); !zone.done(); zone.next()) {
+        if (zone->isGCScheduled())
+            return true;
+    }
+
+    return false;
+}
+
+JS_FRIEND_API(void)
+JS::SkipZoneForGC(Zone *zone)
+{
+    zone->unscheduleGC();
+}
+
+JS_FRIEND_API(void)
+JS::GCForReason(JSRuntime *rt, gcreason::Reason reason)
+{
+    GC(rt, GC_NORMAL, reason);
+}
+
+JS_FRIEND_API(void)
+JS::ShrinkingGC(JSRuntime *rt, gcreason::Reason reason)
+{
+    GC(rt, GC_SHRINK, reason);
+}
+
+JS_FRIEND_API(void)
+JS::IncrementalGC(JSRuntime *rt, gcreason::Reason reason, int64_t millis)
+{
+    GCSlice(rt, GC_NORMAL, reason, millis);
+}
+
+JS_FRIEND_API(void)
+JS::FinishIncrementalGC(JSRuntime *rt, gcreason::Reason reason)
+{
+    GCFinalSlice(rt, GC_NORMAL, reason);
+}
+
+JS_FRIEND_API(JSPrincipals *)
+JS_GetCompartmentPrincipals(JSCompartment *compartment)
+{
+    return compartment->principals;
+}
+
+JS_FRIEND_API(void)
+JS_SetCompartmentPrincipals(JSCompartment *compartment, JSPrincipals *principals)
+{
+    // Short circuit if there's no change.
+    if (principals == compartment->principals)
+        return;
+
+    // Any compartment with the trusted principals -- and there can be
+    // multiple -- is a system compartment.
+    const JSPrincipals *trusted = compartment->runtimeFromMainThread()->trustedPrincipals();
+    bool isSystem = principals && principals == trusted;
+
+    // Clear out the old principals, if any.
+    if (compartment->principals) {
+        JS_DropPrincipals(compartment->runtimeFromMainThread(), compartment->principals);
+        compartment->principals = nullptr;
+        // 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.
+        JS_ASSERT(compartment->isSystem == isSystem);
+    }
+
+    // Set up the new principals.
+    if (principals) {
+        JS_HoldPrincipals(principals);
+        compartment->principals = principals;
+    }
+
+    // Update the system flag.
+    compartment->isSystem = isSystem;
+}
+
+JS_FRIEND_API(bool)
+JS_WrapPropertyDescriptor(JSContext *cx, JS::MutableHandle<js::PropertyDescriptor> desc)
+{
+    return cx->compartment()->wrap(cx, desc);
+}
+
+JS_FRIEND_API(bool)
+JS_WrapAutoIdVector(JSContext *cx, js::AutoIdVector &props)
+{
+    return cx->compartment()->wrap(cx, props);
+}
+
+JS_FRIEND_API(void)
+JS_TraceShapeCycleCollectorChildren(JSTracer *trc, void *shape)
+{
+    MarkCycleCollectorChildren(trc, static_cast<Shape *>(shape));
+}
+
+static bool
+DefineHelpProperty(JSContext *cx, HandleObject obj, const char *prop, const char *value)
+{
+    RootedAtom atom(cx, Atomize(cx, value, strlen(value)));
+    if (!atom)
+        return false;
+    return JS_DefineProperty(cx, obj, prop, atom, JSPROP_READONLY | JSPROP_PERMANENT,
+                             JS_PropertyStub, JS_StrictPropertyStub);
+}
+
+JS_FRIEND_API(bool)
+JS_DefineFunctionsWithHelp(JSContext *cx, HandleObject obj, const JSFunctionSpecWithHelp *fs)
+{
+    JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
+
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, 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));
+        if (!fun)
+            return false;
+
+        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_FRIEND_API(bool)
+js_ObjectClassIs(JSContext *cx, HandleObject obj, ESClassValue classValue)
+{
+    return ObjectClassIs(obj, classValue, cx);
+}
+
+JS_FRIEND_API(const char *)
+js_ObjectClassName(JSContext *cx, HandleObject obj)
+{
+    return JSObject::className(cx, obj);
+}
+
+JS_FRIEND_API(JS::Zone *)
+js::GetCompartmentZone(JSCompartment *comp)
+{
+    return comp->zone();
+}
+
+JS_FRIEND_API(bool)
+js::IsSystemCompartment(JSCompartment *comp)
+{
+    return comp->isSystem;
+}
+
+JS_FRIEND_API(bool)
+js::IsSystemZone(Zone *zone)
+{
+    return zone->isSystem;
+}
+
+JS_FRIEND_API(bool)
+js::IsAtomsCompartment(JSCompartment *comp)
+{
+    return comp->runtimeFromAnyThread()->isAtomsCompartment(comp);
+}
+
+JS_FRIEND_API(bool)
+js::IsInNonStrictPropertySet(JSContext *cx)
+{
+    jsbytecode *pc;
+    JSScript *script = cx->currentScript(&pc, JSContext::ALLOW_CROSS_COMPARTMENT);
+    return script && !script->strict() && (js_CodeSpec[*pc].format & JOF_SET);
+}
+
+JS_FRIEND_API(bool)
+js::IsFunctionObject(JSObject *obj)
+{
+    return obj->is<JSFunction>();
+}
+
+JS_FRIEND_API(bool)
+js::IsScopeObject(JSObject *obj)
+{
+    return obj->is<ScopeObject>();
+}
+
+JS_FRIEND_API(bool)
+js::IsCallObject(JSObject *obj)
+{
+    return obj->is<CallObject>();
+}
+
+JS_FRIEND_API(JSObject *)
+js::GetObjectParentMaybeScope(JSObject *obj)
+{
+    return obj->enclosingScope();
+}
+
+JS_FRIEND_API(JSObject *)
+js::GetGlobalForObjectCrossCompartment(JSObject *obj)
+{
+    return &obj->global();
+}
+
+JS_FRIEND_API(void)
+js::SetPendingExceptionCrossContext(JSContext *cx, JS::HandleValue v)
+{
+    cx->setPendingException(v);
+}
+
+JS_FRIEND_API(void)
+js::AssertSameCompartment(JSContext *cx, JSObject *obj)
+{
+    assertSameCompartment(cx, obj);
+}
+
+#ifdef DEBUG
+JS_FRIEND_API(void)
+js::AssertSameCompartment(JSObject *objA, JSObject *objB)
+{
+    JS_ASSERT(objA->compartment() == objB->compartment());
+}
+#endif
+
+JS_FRIEND_API(JSObject *)
+js::DefaultObjectForContextOrNull(JSContext *cx)
+{
+    if (cx->options().noDefaultCompartmentObject())
+        return nullptr;
+    return cx->maybeDefaultCompartmentObject();
+}
+
+JS_FRIEND_API(void)
+js::SetDefaultObjectForContext(JSContext *cx, JSObject *obj)
+{
+    cx->setDefaultCompartmentObject(obj);
+}
+
+JS_FRIEND_API(void)
+js::NotifyAnimationActivity(JSObject *obj)
+{
+    obj->compartment()->lastAnimationTime = PRMJ_Now();
+}
+
+JS_FRIEND_API(uint32_t)
+js::GetObjectSlotSpan(JSObject *obj)
+{
+    return obj->slotSpan();
+}
+
+JS_FRIEND_API(bool)
+js::IsObjectInContextCompartment(JSObject *obj, const JSContext *cx)
+{
+    return obj->compartment() == cx->compartment();
+}
+
+JS_FRIEND_API(bool)
+js::RunningWithTrustedPrincipals(JSContext *cx)
+{
+    return cx->runningWithTrustedPrincipals();
+}
+
+JS_FRIEND_API(JSScript *)
+js::GetOutermostEnclosingFunctionOfScriptedCaller(JSContext *cx)
+{
+    ScriptFrameIter iter(cx);
+    if (iter.done())
+        return nullptr;
+
+    if (!iter.isFunctionFrame())
+        return nullptr;
+
+    RootedFunction scriptedCaller(cx, iter.callee());
+    RootedScript outermost(cx, scriptedCaller->nonLazyScript());
+    for (StaticScopeIter<NoGC> i(scriptedCaller); !i.done(); i++) {
+        if (i.type() == StaticScopeIter<NoGC>::FUNCTION)
+            outermost = i.funScript();
+    }
+    return outermost;
+}
+
+JS_FRIEND_API(JSFunction *)
+js::DefineFunctionWithReserved(JSContext *cx, JSObject *objArg, const char *name, JSNative call,
+                               unsigned nargs, unsigned attrs)
+{
+    RootedObject obj(cx, objArg);
+    JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, 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, JSFunction::ExtendedFinalizeKind);
+}
+
+JS_FRIEND_API(JSFunction *)
+js::NewFunctionWithReserved(JSContext *cx, JSNative native, unsigned nargs, unsigned flags,
+                            JSObject *parentArg, const char *name)
+{
+    RootedObject parent(cx, parentArg);
+    JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
+
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, parent);
+
+    RootedAtom atom(cx);
+    if (name) {
+        atom = Atomize(cx, name, strlen(name));
+        if (!atom)
+            return nullptr;
+    }
+
+    JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
+    return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, atom,
+                       JSFunction::ExtendedFinalizeKind);
+}
+
+JS_FRIEND_API(JSFunction *)
+js::NewFunctionByIdWithReserved(JSContext *cx, JSNative native, unsigned nargs, unsigned flags, JSObject *parentArg,
+                                jsid id)
+{
+    RootedObject parent(cx, parentArg);
+    JS_ASSERT(JSID_IS_STRING(id));
+    JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, parent);
+
+    RootedAtom atom(cx, JSID_TO_ATOM(id));
+    JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
+    return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, atom,
+                       JSFunction::ExtendedFinalizeKind);
+}
+
+JS_FRIEND_API(JSObject *)
+js::InitClassWithReserved(JSContext *cx, JSObject *objArg, JSObject *parent_protoArg,
+                          const JSClass *clasp, JSNative constructor, unsigned nargs,
+                          const JSPropertySpec *ps, const JSFunctionSpec *fs,
+                          const JSPropertySpec *static_ps, const JSFunctionSpec *static_fs)
+{
+    RootedObject obj(cx, objArg);
+    RootedObject parent_proto(cx, parent_protoArg);
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, obj, parent_proto);
+    return js_InitClass(cx, obj, parent_proto, Valueify(clasp), constructor,
+                        nargs, ps, fs, static_ps, static_fs, nullptr,
+                        JSFunction::ExtendedFinalizeKind);
+}
+
+JS_FRIEND_API(const Value &)
+js::GetFunctionNativeReserved(JSObject *fun, size_t which)
+{
+    JS_ASSERT(fun->as<JSFunction>().isNative());
+    return fun->as<JSFunction>().getExtendedSlot(which);
+}
+
+JS_FRIEND_API(void)
+js::SetFunctionNativeReserved(JSObject *fun, size_t which, const Value &val)
+{
+    JS_ASSERT(fun->as<JSFunction>().isNative());
+    MOZ_ASSERT_IF(val.isObject(), val.toObject().compartment() == fun->compartment());
+    fun->as<JSFunction>().setExtendedSlot(which, val);
+}
+
+JS_FRIEND_API(bool)
+js::GetObjectProto(JSContext *cx, JS::Handle<JSObject*> obj, JS::MutableHandle<JSObject*> proto)
+{
+    if (IsProxy(obj))
+        return JS_GetPrototype(cx, obj, proto);
+
+    proto.set(reinterpret_cast<const shadow::Object*>(obj.get())->type->proto);
+    return true;
+}
+
+JS_FRIEND_API(bool)
+js::GetOriginalEval(JSContext *cx, HandleObject scope, MutableHandleObject eval)
+{
+    assertSameCompartment(cx, scope);
+    Rooted<GlobalObject *> global(cx, &scope->global());
+    return GlobalObject::getOrCreateEval(cx, global, eval);
+}
+
+JS_FRIEND_API(void)
+js::SetReservedSlotWithBarrier(JSObject *obj, size_t slot, const js::Value &value)
+{
+    obj->setSlot(slot, value);
+}
+
+JS_FRIEND_API(bool)
+js::GetGeneric(JSContext *cx, JSObject *objArg, JSObject *receiverArg, jsid idArg,
+               Value *vp)
+{
+    RootedObject obj(cx, objArg), receiver(cx, receiverArg);
+    RootedId id(cx, idArg);
+    RootedValue value(cx);
+    if (!JSObject::getGeneric(cx, obj, receiver, id, &value))
+        return false;
+    *vp = value;
+    return true;
+}
+
+void
+js::SetPreserveWrapperCallback(JSRuntime *rt, PreserveWrapperCallback callback)
+{
+    rt->preserveWrapperCallback = callback;
+}
+
+/*
+ * The below code is for temporary telemetry use. It can be removed when
+ * sufficient data has been harvested.
+ */
+
+namespace js {
+// Defined in vm/GlobalObject.cpp.
+extern size_t sSetProtoCalled;
+}
+
+JS_FRIEND_API(size_t)
+JS_SetProtoCalled(JSContext *)
+{
+    return sSetProtoCalled;
+}
+
+// Defined in jsiter.cpp.
+extern size_t sCustomIteratorCount;
+
+JS_FRIEND_API(size_t)
+JS_GetCustomIteratorCount(JSContext *cx)
+{
+    return sCustomIteratorCount;
+}
+
+JS_FRIEND_API(bool)
+JS_IsDeadWrapper(JSObject *obj)
+{
+    if (!obj->is<ProxyObject>()) {
+        return false;
+    }
+
+    return obj->as<ProxyObject>().handler()->family() == &DeadObjectProxy::sDeadObjectFamily;
+}
+
+void
+js::TraceWeakMaps(WeakMapTracer *trc)
+{
+    WeakMapBase::traceAllMappings(trc);
+    WatchpointMap::traceAll(trc);
+}
+
+extern JS_FRIEND_API(bool)
+js::AreGCGrayBitsValid(JSRuntime *rt)
+{
+    return rt->gcGrayBitsValid;
+}
+
+JS_FRIEND_API(bool)
+js::ZoneGlobalsAreAllGray(JS::Zone *zone)
+{
+    for (CompartmentsInZoneIter comp(zone); !comp.done(); comp.next()) {
+        JSObject *obj = comp->maybeGlobal();
+        if (!obj || !JS::GCThingIsMarkedGray(obj))
+            return false;
+    }
+    return true;
+}
+
+JS_FRIEND_API(JSGCTraceKind)
+js::GCThingTraceKind(void *thing)
+{
+    JS_ASSERT(thing);
+    return gc::GetGCThingTraceKind(thing);
+}
+
+JS_FRIEND_API(void)
+js::VisitGrayWrapperTargets(Zone *zone, GCThingCallback callback, void *closure)
+{
+    JSRuntime *rt = zone->runtimeFromMainThread();
+    for (CompartmentsInZoneIter comp(zone); !comp.done(); comp.next()) {
+        for (JSCompartment::WrapperEnum e(comp); !e.empty(); e.popFront()) {
+            gc::Cell *thing = e.front().key().wrapped;
+            if (!IsInsideNursery(rt, thing) && thing->isMarked(gc::GRAY))
+                callback(closure, thing);
+        }
+    }
+}
+
+JS_FRIEND_API(JSObject *)
+js::GetWeakmapKeyDelegate(JSObject *key)
+{
+    if (JSWeakmapKeyDelegateOp op = key->getClass()->ext.weakmapKeyDelegateOp)
+        return op(key);
+    return nullptr;
+}
+
+JS_FRIEND_API(void)
+JS_SetAccumulateTelemetryCallback(JSRuntime *rt, JSAccumulateTelemetryDataCallback callback)
+{
+    rt->telemetryCallback = callback;
+}
+
+JS_FRIEND_API(JSObject *)
+JS_CloneObject(JSContext *cx, HandleObject obj, HandleObject protoArg, HandleObject parent)
+{
+    Rooted<js::TaggedProto> proto(cx, protoArg.get());
+    return CloneObject(cx, obj, proto, parent);
+}
+
+#ifdef DEBUG
+JS_FRIEND_API(void)
+js_DumpString(JSString *str)
+{
+    str->dump();
+}
+
+JS_FRIEND_API(void)
+js_DumpAtom(JSAtom *atom)
+{
+    atom->dump();
+}
+
+JS_FRIEND_API(void)
+js_DumpChars(const jschar *s, size_t n)
+{
+    fprintf(stderr, "jschar * (%p) = ", (void *) s);
+    JSString::dumpChars(s, n);
+    fputc('\n', stderr);
+}
+
+JS_FRIEND_API(void)
+js_DumpObject(JSObject *obj)
+{
+    if (!obj) {
+        fprintf(stderr, "NULL\n");
+        return;
+    }
+    obj->dump();
+}
+
+#endif
+
+struct DumpHeapTracer : public JSTracer
+{
+    FILE   *output;
+
+    DumpHeapTracer(FILE *fp, JSRuntime *rt, JSTraceCallback callback,
+                   WeakMapTraceKind weakTraceKind)
+      : JSTracer(rt, callback, weakTraceKind), output(fp)
+    {}
+};
+
+static char
+MarkDescriptor(void *thing)
+{
+    gc::Cell *cell = static_cast<gc::Cell*>(thing);
+    if (cell->isMarked(gc::BLACK))
+        return cell->isMarked(gc::GRAY) ? 'G' : 'B';
+    else
+        return cell->isMarked(gc::GRAY) ? 'X' : 'W';
+}
+
+static void
+DumpHeapVisitZone(JSRuntime *rt, void *data, Zone *zone)
+{
+    DumpHeapTracer *dtrc = static_cast<DumpHeapTracer *>(data);
+    fprintf(dtrc->output, "# zone %p\n", (void *)zone);
+}
+
+static void
+DumpHeapVisitCompartment(JSRuntime *rt, void *data, JSCompartment *comp)
+{
+    char name[1024];
+    if (rt->compartmentNameCallback)
+        (*rt->compartmentNameCallback)(rt, comp, name, sizeof(name));
+    else
+        strcpy(name, "<unknown>");
+
+    DumpHeapTracer *dtrc = static_cast<DumpHeapTracer *>(data);
+    fprintf(dtrc->output, "# compartment %s [in zone %p]\n", name, (void *)comp->zone());
+}
+
+static void
+DumpHeapVisitArena(JSRuntime *rt, void *data, gc::Arena *arena,
+                   JSGCTraceKind traceKind, size_t thingSize)
+{
+    DumpHeapTracer *dtrc = static_cast<DumpHeapTracer *>(data);
+    fprintf(dtrc->output, "# arena allockind=%u size=%u\n",
+            unsigned(arena->aheader.getAllocKind()), unsigned(thingSize));
+}
+
+static void
+DumpHeapVisitCell(JSRuntime *rt, void *data, void *thing,
+                  JSGCTraceKind traceKind, size_t thingSize)
+{
+    DumpHeapTracer *dtrc = static_cast<DumpHeapTracer *>(data);
+    char cellDesc[1024 * 32];
+    JS_GetTraceThingInfo(cellDesc, sizeof(cellDesc), dtrc, thing, traceKind, true);
+    fprintf(dtrc->output, "%p %c %s\n", thing, MarkDescriptor(thing), cellDesc);
+    JS_TraceChildren(dtrc, thing, traceKind);
+}
+
+static void
+DumpHeapVisitChild(JSTracer *trc, void **thingp, JSGCTraceKind kind)
+{
+    if (gc::IsInsideNursery(trc->runtime(), *thingp))
+        return;
+
+    DumpHeapTracer *dtrc = static_cast<DumpHeapTracer *>(trc);
+    char buffer[1024];
+    fprintf(dtrc->output, "> %p %c %s\n", *thingp, MarkDescriptor(*thingp),
+            dtrc->getTracingEdgeName(buffer, sizeof(buffer)));
+}
+
+static void
+DumpHeapVisitRoot(JSTracer *trc, void **thingp, JSGCTraceKind kind)
+{
+    if (gc::IsInsideNursery(trc->runtime(), *thingp))
+        return;
+
+    DumpHeapTracer *dtrc = static_cast<DumpHeapTracer *>(trc);
+    char buffer[1024];
+    fprintf(dtrc->output, "%p %c %s\n", *thingp, MarkDescriptor(*thingp),
+            dtrc->getTracingEdgeName(buffer, sizeof(buffer)));
+}
+
+void
+js::DumpHeapComplete(JSRuntime *rt, FILE *fp, js::DumpHeapNurseryBehaviour nurseryBehaviour)
+{
+#ifdef JSGC_GENERATIONAL
+    if (nurseryBehaviour == js::CollectNurseryBeforeDump)
+        MinorGC(rt, JS::gcreason::API);
+#endif
+
+    DumpHeapTracer dtrc(fp, rt, DumpHeapVisitRoot, TraceWeakMapKeysValues);
+    TraceRuntime(&dtrc);
+
+    fprintf(dtrc.output, "==========\n");
+
+    dtrc.setTraceCallback(DumpHeapVisitChild);
+    IterateZonesCompartmentsArenasCells(rt, &dtrc,
+                                        DumpHeapVisitZone,
+                                        DumpHeapVisitCompartment,
+                                        DumpHeapVisitArena,
+                                        DumpHeapVisitCell);
+
+    fflush(dtrc.output);
+}
+
+JS_FRIEND_API(const JSStructuredCloneCallbacks *)
+js::GetContextStructuredCloneCallbacks(JSContext *cx)
+{
+    return cx->runtime()->structuredCloneCallbacks;
+}
+
+#ifdef JS_THREADSAFE
+JS_FRIEND_API(bool)
+js::ContextHasOutstandingRequests(const JSContext *cx)
+{
+    return cx->outstandingRequests > 0;
+}
+#endif
+
+JS_FRIEND_API(void)
+js::SetActivityCallback(JSRuntime *rt, ActivityCallback cb, void *arg)
+{
+    rt->activityCallback = cb;
+    rt->activityCallbackArg = arg;
+}
+
+JS_FRIEND_API(bool)
+js::IsContextRunningJS(JSContext *cx)
+{
+    return cx->currentlyRunning();
+}
+
+JS_FRIEND_API(JS::GCSliceCallback)
+JS::SetGCSliceCallback(JSRuntime *rt, GCSliceCallback callback)
+{
+    JS::GCSliceCallback old = rt->gcSliceCallback;
+    rt->gcSliceCallback = callback;
+    return old;
+}
+
+JS_FRIEND_API(bool)
+JS::WasIncrementalGC(JSRuntime *rt)
+{
+    return rt->gcIsIncremental;
+}
+
+jschar *
+GCDescription::formatMessage(JSRuntime *rt) const
+{
+    return rt->gcStats.formatMessage();
+}
+
+jschar *
+GCDescription::formatJSON(JSRuntime *rt, uint64_t timestamp) const
+{
+    return rt->gcStats.formatJSON(timestamp);
+}
+
+JS_FRIEND_API(void)
+JS::NotifyDidPaint(JSRuntime *rt)
+{
+    if (rt->gcZeal() == gc::ZealFrameVerifierPreValue) {
+        gc::VerifyBarriers(rt, gc::PreBarrierVerifier);
+        return;
+    }
+
+    if (rt->gcZeal() == gc::ZealFrameVerifierPostValue) {
+        gc::VerifyBarriers(rt, gc::PostBarrierVerifier);
+        return;
+    }
+
+    if (rt->gcZeal() == gc::ZealFrameGCValue) {
+        PrepareForFullGC(rt);
+        GCSlice(rt, GC_NORMAL, gcreason::REFRESH_FRAME);
+        return;
+    }
+
+    if (JS::IsIncrementalGCInProgress(rt) && !rt->gcInterFrameGC) {
+        JS::PrepareForIncrementalGC(rt);
+        GCSlice(rt, GC_NORMAL, gcreason::REFRESH_FRAME);
+    }
+
+    rt->gcInterFrameGC = false;
+}
+
+JS_FRIEND_API(bool)
+JS::IsIncrementalGCEnabled(JSRuntime *rt)
+{
+    return rt->gcIncrementalEnabled && rt->gcMode() == JSGC_MODE_INCREMENTAL;
+}
+
+JS_FRIEND_API(bool)
+JS::IsIncrementalGCInProgress(JSRuntime *rt)
+{
+    return rt->gcIncrementalState != gc::NO_INCREMENTAL && !rt->gcVerifyPreData;
+}
+
+JS_FRIEND_API(void)
+JS::DisableIncrementalGC(JSRuntime *rt)
+{
+    rt->gcIncrementalEnabled = false;
+}
+
+JS::AutoDisableGenerationalGC::AutoDisableGenerationalGC(JSRuntime *rt)
+  : runtime(rt)
+#if defined(JSGC_GENERATIONAL) && defined(JS_GC_ZEAL)
+  , restartVerifier(rt->gcVerifyPostData)
+#endif
+{
+#ifdef JSGC_GENERATIONAL
+    if (IsGenerationalGCEnabled(rt)) {
+#ifdef JS_GC_ZEAL
+        if (restartVerifier)
+            gc::EndVerifyPostBarriers(rt);
+#endif
+        MinorGC(rt, JS::gcreason::API);
+        rt->gcNursery.disable();
+        rt->gcStoreBuffer.disable();
+    }
+#endif
+    ++rt->gcGenerationalDisabled;
+}
+
+JS::AutoDisableGenerationalGC::~AutoDisableGenerationalGC()
+{
+    JS_ASSERT(runtime->gcGenerationalDisabled > 0);
+    --runtime->gcGenerationalDisabled;
+#ifdef JSGC_GENERATIONAL
+    if (runtime->gcGenerationalDisabled == 0) {
+        runtime->gcNursery.enable();
+        runtime->gcStoreBuffer.enable();
+#ifdef JS_GC_ZEAL
+        if (restartVerifier)
+            gc::StartVerifyPostBarriers(runtime);
+#endif
+    }
+#endif
+}
+
+extern JS_FRIEND_API(bool)
+JS::IsGenerationalGCEnabled(JSRuntime *rt)
+{
+    return rt->gcGenerationalDisabled == 0;
+}
+
+JS_FRIEND_API(bool)
+JS::IsIncrementalBarrierNeeded(JSRuntime *rt)
+{
+    return rt->gcIncrementalState == gc::MARK && !rt->isHeapBusy();
+}
+
+JS_FRIEND_API(bool)
+JS::IsIncrementalBarrierNeeded(JSContext *cx)
+{
+    return IsIncrementalBarrierNeeded(cx->runtime());
+}
+
+JS_FRIEND_API(void)
+JS::IncrementalObjectBarrier(JSObject *obj)
+{
+    if (!obj)
+        return;
+
+    JS_ASSERT(!obj->zone()->runtimeFromMainThread()->isHeapMajorCollecting());
+
+    AutoMarkInDeadZone amn(obj->zone());
+
+    JSObject::writeBarrierPre(obj);
+}
+
+JS_FRIEND_API(void)
+JS::IncrementalReferenceBarrier(void *ptr, JSGCTraceKind kind)
+{
+    if (!ptr)
+        return;
+
+    if (kind == JSTRACE_STRING && StringIsPermanentAtom(static_cast<JSString *>(ptr)))
+        return;
+
+    gc::Cell *cell = static_cast<gc::Cell *>(ptr);
+    Zone *zone = kind == JSTRACE_OBJECT
+                 ? static_cast<JSObject *>(cell)->zone()
+                 : cell->tenuredZone();
+
+    JS_ASSERT(!zone->runtimeFromMainThread()->isHeapMajorCollecting());
+
+    AutoMarkInDeadZone amn(zone);
+
+    if (kind == JSTRACE_OBJECT)
+        JSObject::writeBarrierPre(static_cast<JSObject*>(cell));
+    else if (kind == JSTRACE_STRING)
+        JSString::writeBarrierPre(static_cast<JSString*>(cell));
+    else if (kind == JSTRACE_SCRIPT)
+        JSScript::writeBarrierPre(static_cast<JSScript*>(cell));
+    else if (kind == JSTRACE_LAZY_SCRIPT)
+        LazyScript::writeBarrierPre(static_cast<LazyScript*>(cell));
+    else if (kind == JSTRACE_SHAPE)
+        Shape::writeBarrierPre(static_cast<Shape*>(cell));
+    else if (kind == JSTRACE_BASE_SHAPE)
+        BaseShape::writeBarrierPre(static_cast<BaseShape*>(cell));
+    else if (kind == JSTRACE_TYPE_OBJECT)
+        types::TypeObject::writeBarrierPre((types::TypeObject *) ptr);
+    else
+        MOZ_ASSUME_UNREACHABLE("invalid trace kind");
+}
+
+JS_FRIEND_API(void)
+JS::IncrementalValueBarrier(const Value &v)
+{
+    js::HeapValue::writeBarrierPre(v);
+}
+
+JS_FRIEND_API(void)
+JS::PokeGC(JSRuntime *rt)
+{
+    rt->gcPoke = true;
+}
+
+JS_FRIEND_API(JSCompartment *)
+js::GetAnyCompartmentInZone(JS::Zone *zone)
+{
+    CompartmentsInZoneIter comp(zone);
+    JS_ASSERT(!comp.done());
+    return comp.get();
+}
+
+bool
+JS::ObjectPtr::isAboutToBeFinalized()
+{
+    return JS_IsAboutToBeFinalized(&value);
+}
+
+void
+JS::ObjectPtr::trace(JSTracer *trc, const char *name)
+{
+    JS_CallHeapObjectTracer(trc, &value, name);
+}
+
+JS_FRIEND_API(JSObject *)
+js::GetTestingFunctions(JSContext *cx)
+{
+    RootedObject obj(cx, JS_NewObject(cx, nullptr, NullPtr(), NullPtr()));
+    if (!obj)
+        return nullptr;
+
+    if (!DefineTestingFunctions(cx, obj, false))
+        return nullptr;
+
+    return obj;
+}
+
+#ifdef DEBUG
+JS_FRIEND_API(unsigned)
+js::GetEnterCompartmentDepth(JSContext *cx)
+{
+  return cx->getEnterCompartmentDepth();
+}
+#endif
+
+JS_FRIEND_API(void)
+js::SetDOMCallbacks(JSRuntime *rt, const DOMCallbacks *callbacks)
+{
+    rt->DOMcallbacks = callbacks;
+}
+
+JS_FRIEND_API(const DOMCallbacks *)
+js::GetDOMCallbacks(JSRuntime *rt)
+{
+    return rt->DOMcallbacks;
+}
+
+static const void *gDOMProxyHandlerFamily = nullptr;
+static uint32_t gDOMProxyExpandoSlot = 0;
+static DOMProxyShadowsCheck gDOMProxyShadowsCheck;
+
+JS_FRIEND_API(void)
+js::SetDOMProxyInformation(const void *domProxyHandlerFamily, uint32_t domProxyExpandoSlot,
+                           DOMProxyShadowsCheck domProxyShadowsCheck)
+{
+    gDOMProxyHandlerFamily = domProxyHandlerFamily;
+    gDOMProxyExpandoSlot = domProxyExpandoSlot;
+    gDOMProxyShadowsCheck = domProxyShadowsCheck;
+}
+
+const void *
+js::GetDOMProxyHandlerFamily()
+{
+    return gDOMProxyHandlerFamily;
+}
+
+uint32_t
+js::GetDOMProxyExpandoSlot()
+{
+    return gDOMProxyExpandoSlot;
+}
+
+DOMProxyShadowsCheck
+js::GetDOMProxyShadowsCheck()
+{
+    return gDOMProxyShadowsCheck;
+}
+
+bool
+js::detail::IdMatchesAtom(jsid id, JSAtom *atom)
+{
+    return id == INTERNED_STRING_TO_JSID(nullptr, atom);
+}
+
+JS_FRIEND_API(JSContext *)
+js::DefaultJSContext(JSRuntime *rt)
+{
+    if (rt->defaultJSContextCallback) {
+        JSContext *cx = rt->defaultJSContextCallback(rt);
+        JS_ASSERT(cx);
+        return cx;
+    }
+    JS_ASSERT(rt->contextList.getFirst() == rt->contextList.getLast());
+    return rt->contextList.getFirst();
+}
+
+JS_FRIEND_API(void)
+js::SetDefaultJSContextCallback(JSRuntime *rt, DefaultJSContextCallback cb)
+{
+    rt->defaultJSContextCallback = cb;
+}
+
+#ifdef DEBUG
+JS_FRIEND_API(void)
+js::Debug_SetActiveJSContext(JSRuntime *rt, JSContext *cx)
+{
+    rt->activeContext = cx;
+}
+#endif
+
+JS_FRIEND_API(void)
+js::SetCTypesActivityCallback(JSRuntime *rt, CTypesActivityCallback cb)
+{
+    rt->ctypesActivityCallback = cb;
+}
+
+js::AutoCTypesActivityCallback::AutoCTypesActivityCallback(JSContext *cx,
+                                                           js::CTypesActivityType beginType,
+                                                           js::CTypesActivityType endType
+                                                           MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
+  : cx(cx), callback(cx->runtime()->ctypesActivityCallback), endType(endType)
+{
+    MOZ_GUARD_OBJECT_NOTIFIER_INIT;
+
+    if (callback)
+        callback(cx, beginType);
+}
+
+JS_FRIEND_API(void)
+js::SetObjectMetadataCallback(JSContext *cx, ObjectMetadataCallback callback)
+{
+    cx->compartment()->setObjectMetadataCallback(callback);
+}
+
+JS_FRIEND_API(bool)
+js::SetObjectMetadata(JSContext *cx, HandleObject obj, HandleObject metadata)
+{
+    return JSObject::setMetadata(cx, obj, metadata);
+}
+
+JS_FRIEND_API(JSObject *)
+js::GetObjectMetadata(JSObject *obj)
+{
+    return obj->getMetadata();
+}
+
+JS_FRIEND_API(void)
+js::UnsafeDefineElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::HandleValue value)
+{
+    JS_ASSERT(obj->isNative());
+    JS_ASSERT(index < obj->getDenseInitializedLength());
+    obj->setDenseElementWithType(cx, index, value);
+}
+
+JS_FRIEND_API(bool)
+js_DefineOwnProperty(JSContext *cx, JSObject *objArg, jsid idArg,
+                     JS::Handle<js::PropertyDescriptor> descriptor, bool *bp)
+{
+    RootedObject obj(cx, objArg);
+    RootedId id(cx, idArg);
+    JS_ASSERT(cx->runtime()->heapState == js::Idle);
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, obj, id, descriptor.value());
+    if (descriptor.hasGetterObject())
+        assertSameCompartment(cx, descriptor.getterObject());
+    if (descriptor.hasSetterObject())
+        assertSameCompartment(cx, descriptor.setterObject());
+
+    return DefineOwnProperty(cx, HandleObject(obj), id, descriptor, bp);
+}
+
+JS_FRIEND_API(bool)
+js_ReportIsNotFunction(JSContext *cx, JS::HandleValue v)
+{
+    return ReportIsNotFunction(cx, v);
+}
+
+#ifdef DEBUG
+JS_PUBLIC_API(bool)
+js::IsInRequest(JSContext *cx)
+{
+#ifdef JS_THREADSAFE
+    return !!cx->runtime()->requestDepth;
+#else
+    return true;
+#endif
+}
+#endif
+
+#ifdef JSGC_GENERATIONAL
+JS_FRIEND_API(void)
+JS_StoreObjectPostBarrierCallback(JSContext* cx,
+                                  void (*callback)(JSTracer *trc, JSObject *key, void *data),
+                                  JSObject *key, void *data)
+{
+    JSRuntime *rt = cx->runtime();
+    if (IsInsideNursery(rt, key))
+        rt->gcStoreBuffer.putCallback(callback, key, data);
+}
+
+extern JS_FRIEND_API(void)
+JS_StoreStringPostBarrierCallback(JSContext* cx,
+                                  void (*callback)(JSTracer *trc, JSString *key, void *data),
+                                  JSString *key, void *data)
+{
+    JSRuntime *rt = cx->runtime();
+    if (IsInsideNursery(rt, key))
+        rt->gcStoreBuffer.putCallback(callback, key, data);
+}
+#endif /* JSGC_GENERATIONAL */