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-rw-r--r--js/src/jswatchpoint.cpp245
1 files changed, 0 insertions, 245 deletions
diff --git a/js/src/jswatchpoint.cpp b/js/src/jswatchpoint.cpp
deleted file mode 100644
index 3cf43e219..000000000
--- a/js/src/jswatchpoint.cpp
+++ /dev/null
@@ -1,245 +0,0 @@
-/* -*- 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 "jswatchpoint.h"
-
-#include "jsatom.h"
-#include "jscompartment.h"
-#include "jsfriendapi.h"
-
-#include "gc/Marking.h"
-#include "vm/Shape.h"
-
-#include "jsgcinlines.h"
-
-using namespace js;
-using namespace js::gc;
-
-inline HashNumber
-WatchKeyHasher::hash(const Lookup& key)
-{
- return MovableCellHasher<PreBarrieredObject>::hash(key.object) ^ HashId(key.id);
-}
-
-namespace {
-
-class AutoEntryHolder {
- typedef WatchpointMap::Map Map;
- Generation gen;
- Map& map;
- Map::Ptr p;
- RootedObject obj;
- RootedId id;
-
- public:
- AutoEntryHolder(JSContext* cx, Map& map, Map::Ptr p)
- : gen(map.generation()), map(map), p(p), obj(cx, p->key().object), id(cx, p->key().id)
- {
- MOZ_ASSERT(!p->value().held);
- p->value().held = true;
- }
-
- ~AutoEntryHolder() {
- if (gen != map.generation())
- p = map.lookup(WatchKey(obj, id));
- if (p)
- p->value().held = false;
- }
-};
-
-} /* anonymous namespace */
-
-bool
-WatchpointMap::init()
-{
- return map.init();
-}
-
-bool
-WatchpointMap::watch(JSContext* cx, HandleObject obj, HandleId id,
- JSWatchPointHandler handler, HandleObject closure)
-{
- MOZ_ASSERT(JSID_IS_STRING(id) || JSID_IS_INT(id) || JSID_IS_SYMBOL(id));
-
- if (!obj->setWatched(cx))
- return false;
-
- Watchpoint w(handler, closure, false);
- if (!map.put(WatchKey(obj, id), w)) {
- ReportOutOfMemory(cx);
- return false;
- }
- /*
- * For generational GC, we don't need to post-barrier writes to the
- * hashtable here because we mark all watchpoints as part of root marking in
- * markAll().
- */
- return true;
-}
-
-void
-WatchpointMap::unwatch(JSObject* obj, jsid id,
- JSWatchPointHandler* handlerp, JSObject** closurep)
-{
- if (Map::Ptr p = map.lookup(WatchKey(obj, id))) {
- if (handlerp)
- *handlerp = p->value().handler;
- if (closurep) {
- // Read barrier to prevent an incorrectly gray closure from escaping the
- // watchpoint. See the comment before UnmarkGrayChildren in gc/Marking.cpp
- JS::ExposeObjectToActiveJS(p->value().closure);
- *closurep = p->value().closure;
- }
- map.remove(p);
- }
-}
-
-void
-WatchpointMap::unwatchObject(JSObject* obj)
-{
- for (Map::Enum e(map); !e.empty(); e.popFront()) {
- Map::Entry& entry = e.front();
- if (entry.key().object == obj)
- e.removeFront();
- }
-}
-
-void
-WatchpointMap::clear()
-{
- map.clear();
-}
-
-bool
-WatchpointMap::triggerWatchpoint(JSContext* cx, HandleObject obj, HandleId id, MutableHandleValue vp)
-{
- Map::Ptr p = map.lookup(WatchKey(obj, id));
- if (!p || p->value().held)
- return true;
-
- AutoEntryHolder holder(cx, map, p);
-
- /* Copy the entry, since GC would invalidate p. */
- JSWatchPointHandler handler = p->value().handler;
- RootedObject closure(cx, p->value().closure);
-
- /* Determine the property's old value. */
- Value old;
- old.setUndefined();
- if (obj->isNative()) {
- NativeObject* nobj = &obj->as<NativeObject>();
- if (Shape* shape = nobj->lookup(cx, id)) {
- if (shape->hasSlot())
- old = nobj->getSlot(shape->slot());
- }
- }
-
- // Read barrier to prevent an incorrectly gray closure from escaping the
- // watchpoint. See the comment before UnmarkGrayChildren in gc/Marking.cpp
- JS::ExposeObjectToActiveJS(closure);
-
- /* Call the handler. */
- return handler(cx, obj, id, old, vp.address(), closure);
-}
-
-bool
-WatchpointMap::markIteratively(JSTracer* trc)
-{
- bool marked = false;
- for (Map::Enum e(map); !e.empty(); e.popFront()) {
- Map::Entry& entry = e.front();
- JSObject* priorKeyObj = entry.key().object;
- jsid priorKeyId(entry.key().id.get());
- bool objectIsLive =
- IsMarked(trc->runtime(), const_cast<PreBarrieredObject*>(&entry.key().object));
- if (objectIsLive || entry.value().held) {
- if (!objectIsLive) {
- TraceEdge(trc, const_cast<PreBarrieredObject*>(&entry.key().object),
- "held Watchpoint object");
- marked = true;
- }
-
- MOZ_ASSERT(JSID_IS_STRING(priorKeyId) ||
- JSID_IS_INT(priorKeyId) ||
- JSID_IS_SYMBOL(priorKeyId));
- TraceEdge(trc, const_cast<PreBarrieredId*>(&entry.key().id), "WatchKey::id");
-
- if (entry.value().closure && !IsMarked(trc->runtime(), &entry.value().closure)) {
- TraceEdge(trc, &entry.value().closure, "Watchpoint::closure");
- marked = true;
- }
-
- /* We will sweep this entry in sweepAll if !objectIsLive. */
- if (priorKeyObj != entry.key().object || priorKeyId != entry.key().id)
- e.rekeyFront(WatchKey(entry.key().object, entry.key().id));
- }
- }
- return marked;
-}
-
-void
-WatchpointMap::markAll(JSTracer* trc)
-{
- for (Map::Enum e(map); !e.empty(); e.popFront()) {
- Map::Entry& entry = e.front();
- WatchKey key = entry.key();
- WatchKey prior = key;
- MOZ_ASSERT(JSID_IS_STRING(prior.id) || JSID_IS_INT(prior.id) || JSID_IS_SYMBOL(prior.id));
-
- TraceEdge(trc, const_cast<PreBarrieredObject*>(&key.object),
- "held Watchpoint object");
- TraceEdge(trc, const_cast<PreBarrieredId*>(&key.id), "WatchKey::id");
- TraceEdge(trc, &entry.value().closure, "Watchpoint::closure");
-
- if (prior.object != key.object || prior.id != key.id)
- e.rekeyFront(key);
- }
-}
-
-void
-WatchpointMap::sweepAll(JSRuntime* rt)
-{
- for (GCCompartmentsIter c(rt); !c.done(); c.next()) {
- if (WatchpointMap* wpmap = c->watchpointMap)
- wpmap->sweep();
- }
-}
-
-void
-WatchpointMap::sweep()
-{
- for (Map::Enum e(map); !e.empty(); e.popFront()) {
- Map::Entry& entry = e.front();
- JSObject* obj(entry.key().object);
- if (IsAboutToBeFinalizedUnbarriered(&obj)) {
- MOZ_ASSERT(!entry.value().held);
- e.removeFront();
- } else if (obj != entry.key().object) {
- e.rekeyFront(WatchKey(obj, entry.key().id));
- }
- }
-}
-
-void
-WatchpointMap::traceAll(WeakMapTracer* trc)
-{
- JSRuntime* rt = trc->context;
- for (CompartmentsIter comp(rt, SkipAtoms); !comp.done(); comp.next()) {
- if (WatchpointMap* wpmap = comp->watchpointMap)
- wpmap->trace(trc);
- }
-}
-
-void
-WatchpointMap::trace(WeakMapTracer* trc)
-{
- for (Map::Range r = map.all(); !r.empty(); r.popFront()) {
- Map::Entry& entry = r.front();
- trc->trace(nullptr,
- JS::GCCellPtr(entry.key().object.get()),
- JS::GCCellPtr(entry.value().closure.get()));
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 10:45:46 +0000