Issue #1257 - Part 2: Remove watch/unwatch and JS watchpoint class.

1 files changed, 0 insertions, 246 deletions

diff --git a/js/src/jswatchpoint.cpp b/js/src/jswatchpoint.cpp
deleted file mode 100644
index 34479a990..000000000
--- a/js/src/jswatchpoint.cpp
+++ /dev/null
@@ -1,246 +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 (!JSObject::setWatched(cx, obj))
-        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();
-        JSObject* object = entry.key().object;
-        jsid id = entry.key().id;
-        JSObject* priorObject = object;
-        jsid priorId = id;
-        MOZ_ASSERT(JSID_IS_STRING(priorId) || JSID_IS_INT(priorId) || JSID_IS_SYMBOL(priorId));
-
-        TraceManuallyBarrieredEdge(trc, &object, "held Watchpoint object");             
-        TraceManuallyBarrieredEdge(trc, &id, "WatchKey::id");		
-        TraceEdge(trc, &entry.value().closure, "Watchpoint::closure");
-
-        if (priorObject != object || priorId != id)
-            e.rekeyFront(WatchKey(object, id));
-    }
-}
-
-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()));
-    }
-}