JS::TraceIncomingCCWs(JSTracer* trc, const JS::CompartmentSet& compartments)
{
for (js::CompartmentsIter comp(trc->runtime(), SkipAtoms); !comp.done(); comp.next()) {
if (compartments.has(comp))
continue;
for (JSCompartment::WrapperEnum e(comp); !e.empty(); e.popFront()) {
const CrossCompartmentKey& key = e.front().key();
JSObject* obj;
JSScript* script;
switch (key.kind) {
case CrossCompartmentKey::StringWrapper:
// StringWrappers are just used to avoid copying strings
// across zones multiple times, and don't hold a strong
// reference.
continue;
case CrossCompartmentKey::ObjectWrapper:
case CrossCompartmentKey::DebuggerObject:
case CrossCompartmentKey::DebuggerSource:
case CrossCompartmentKey::DebuggerEnvironment:
case CrossCompartmentKey::DebuggerWasmScript:
case CrossCompartmentKey::DebuggerWasmSource:
obj = static_cast<JSObject*>(key.wrapped);
// Ignore CCWs whose wrapped value doesn't live in our given
// set of zones.
if (!compartments.has(obj->compartment()))
continue;
TraceManuallyBarrieredEdge(trc, &obj, "cross-compartment wrapper");
MOZ_ASSERT(obj == key.wrapped);
break;
case CrossCompartmentKey::DebuggerScript:
script = static_cast<JSScript*>(key.wrapped);
// Ignore CCWs whose wrapped value doesn't live in our given
// set of compartments.
if (!compartments.has(script->compartment()))
continue;
TraceManuallyBarrieredEdge(trc, &script, "cross-compartment wrapper");
MOZ_ASSERT(script == key.wrapped);
break;
}
}
}
}
JS_PUBLIC_API void JS::TraceIncomingCCWs(
JSTracer* trc, const JS::CompartmentSet& compartments) {
for (js::CompartmentsIter comp(trc->runtime()); !comp.done(); comp.next()) {
if (compartments.has(comp)) {
continue;
}
for (Compartment::WrapperEnum e(comp); !e.empty(); e.popFront()) {
mozilla::DebugOnly<const CrossCompartmentKey> prior = e.front().key();
e.front().mutableKey().applyToWrapped(
TraceIncomingFunctor(trc, compartments));
MOZ_ASSERT(e.front().key() == prior);
}
}
}