void
JSCompartment::markTypes(JSTracer *trc)
{
    /*
     * Mark all scripts, type objects and singleton JS objects in the
     * compartment. These can be referred to directly by type sets, which we
     * cannot modify while code which depends on these type sets is active.
     */
    JS_ASSERT(activeAnalysis);

    for (CellIterUnderGC i(this, FINALIZE_SCRIPT); !i.done(); i.next()) {
        JSScript *script = i.get<JSScript>();
        MarkScriptRoot(trc, &script, "mark_types_script");
        JS_ASSERT(script == i.get<JSScript>());
    }

    for (size_t thingKind = FINALIZE_OBJECT0;
         thingKind < FINALIZE_OBJECT_LIMIT;
         thingKind++) {
        for (CellIterUnderGC i(this, AllocKind(thingKind)); !i.done(); i.next()) {
            JSObject *object = i.get<JSObject>();
            if (object->hasSingletonType()) {
                MarkObjectRoot(trc, &object, "mark_types_singleton");
                JS_ASSERT(object == i.get<JSObject>());
            }
        }
    }

    for (CellIterUnderGC i(this, FINALIZE_TYPE_OBJECT); !i.done(); i.next()) {
        types::TypeObject *type = i.get<types::TypeObject>();
        MarkTypeObjectRoot(trc, &type, "mark_types_scan");
        JS_ASSERT(type == i.get<types::TypeObject>());
    }
}
Exemple #2
0
void
GCMarker::processMarkStackOther(SliceBudget &budget, uintptr_t tag, uintptr_t addr)
{
    if (tag == TypeTag) {
        ScanTypeObject(this, reinterpret_cast<types::TypeObject *>(addr));
    } else if (tag == SavedValueArrayTag) {
        JS_ASSERT(!(addr & Cell::CellMask));
        JSObject *obj = reinterpret_cast<JSObject *>(addr);
        HeapValue *vp, *end;
        if (restoreValueArray(obj, (void **)&vp, (void **)&end))
            pushValueArray(obj, vp, end);
        else
            pushObject(obj);
    } else if (tag == IonCodeTag) {
        MarkChildren(this, reinterpret_cast<ion::IonCode *>(addr));
    } else if (tag == ArenaTag) {
        ArenaHeader *aheader = reinterpret_cast<ArenaHeader *>(addr);
        AllocKind thingKind = aheader->getAllocKind();
        size_t thingSize = Arena::thingSize(thingKind);

        for ( ; aheader; aheader = aheader->next) {
            Arena *arena = aheader->getArena();
            FreeSpan firstSpan(aheader->getFirstFreeSpan());
            const FreeSpan *span = &firstSpan;

            for (uintptr_t thing = arena->thingsStart(thingKind); ; thing += thingSize) {
                JS_ASSERT(thing <= arena->thingsEnd());
                if (thing == span->first) {
                    if (!span->hasNext())
                        break;
                    thing = span->last;
                    span = span->nextSpan();
                } else {
                    JSObject *object = reinterpret_cast<JSObject *>(thing);
                    if (object->hasSingletonType() && object->markIfUnmarked(getMarkColor()))
                        pushObject(object);
                    budget.step();
                }
            }
            if (budget.isOverBudget()) {
                pushArenaList(aheader);
                return;
            }
        }
    }

#if JS_HAS_XML_SUPPORT
    else {
        JS_ASSERT(tag == XmlTag);
        MarkChildren(this, reinterpret_cast<JSXML *>(addr));
    }
#endif
}