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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* JS symbol tables. */
#include "vm/ShapeZone.h"
#include "gc/Marking-inl.h"
#include "vm/JSContext-inl.h"
#include "vm/Shape-inl.h"
using namespace js;
void ShapeZone::fixupPropMapShapeTableAfterMovingGC() {
for (PropMapShapeSet::Enum e(propMapShapes); !e.empty(); e.popFront()) {
Shape* shape = MaybeForwarded(e.front().unbarrieredGet());
SharedPropMap* map = MaybeForwarded(shape->propMap())->asShared();
BaseShape* base = MaybeForwarded(shape->base());
PropMapShapeSet::Lookup lookup(base, shape->numFixedSlots(), map,
shape->propMapLength(),
shape->objectFlags());
e.rekeyFront(lookup, shape);
}
}
#ifdef JSGC_HASH_TABLE_CHECKS
void ShapeZone::checkTablesAfterMovingGC() {
// Assert that the moving GC worked and that nothing is left in the tables
// that points into the nursery, and that the hash table entries are
// discoverable.
for (auto r = initialPropMaps.all(); !r.empty(); r.popFront()) {
SharedPropMap* map = r.front().unbarrieredGet();
CheckGCThingAfterMovingGC(map);
InitialPropMapHasher::Lookup lookup(map->getKey(0),
map->getPropertyInfo(0));
InitialPropMapSet::Ptr ptr = initialPropMaps.lookup(lookup);
MOZ_RELEASE_ASSERT(ptr.found() && &*ptr == &r.front());
}
for (auto r = baseShapes.all(); !r.empty(); r.popFront()) {
BaseShape* base = r.front().unbarrieredGet();
CheckGCThingAfterMovingGC(base);
BaseShapeHasher::Lookup lookup(base->clasp(), base->realm(), base->proto());
BaseShapeSet::Ptr ptr = baseShapes.lookup(lookup);
MOZ_RELEASE_ASSERT(ptr.found() && &*ptr == &r.front());
}
for (auto r = initialShapes.all(); !r.empty(); r.popFront()) {
Shape* shape = r.front().unbarrieredGet();
CheckGCThingAfterMovingGC(shape);
using Lookup = InitialShapeHasher::Lookup;
Lookup lookup(shape->getObjectClass(), shape->realm(), shape->proto(),
shape->numFixedSlots(), shape->objectFlags());
InitialShapeSet::Ptr ptr = initialShapes.lookup(lookup);
MOZ_RELEASE_ASSERT(ptr.found() && &*ptr == &r.front());
}
for (auto r = propMapShapes.all(); !r.empty(); r.popFront()) {
Shape* shape = r.front().unbarrieredGet();
CheckGCThingAfterMovingGC(shape);
using Lookup = PropMapShapeHasher::Lookup;
Lookup lookup(shape->base(), shape->numFixedSlots(), shape->sharedPropMap(),
shape->propMapLength(), shape->objectFlags());
PropMapShapeSet::Ptr ptr = propMapShapes.lookup(lookup);
MOZ_RELEASE_ASSERT(ptr.found() && &*ptr == &r.front());
}
}
#endif // JSGC_HASH_TABLE_CHECKS
ShapeZone::ShapeZone(Zone* zone)
: baseShapes(zone),
initialPropMaps(zone),
initialShapes(zone),
propMapShapes(zone) {}
void ShapeZone::purgeShapeCaches(JS::GCContext* gcx) {
for (Shape* shape : shapesWithCache) {
MaybeForwarded(shape)->purgeCache(gcx);
}
shapesWithCache.clearAndFree();
}
void ShapeZone::addSizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf,
size_t* initialPropMapTable,
size_t* shapeTables) {
*shapeTables += baseShapes.sizeOfExcludingThis(mallocSizeOf);
*initialPropMapTable += initialPropMaps.sizeOfExcludingThis(mallocSizeOf);
*shapeTables += initialShapes.sizeOfExcludingThis(mallocSizeOf);
*shapeTables += propMapShapes.sizeOfExcludingThis(mallocSizeOf);
*shapeTables += shapesWithCache.sizeOfExcludingThis(mallocSizeOf);
}