1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jswatchpoint.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,85 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jswatchpoint_h
1.11 +#define jswatchpoint_h
1.12 +
1.13 +#include "jsalloc.h"
1.14 +
1.15 +#include "gc/Barrier.h"
1.16 +#include "js/HashTable.h"
1.17 +#include "js/OldDebugAPI.h"
1.18 +
1.19 +namespace js {
1.20 +
1.21 +struct WeakMapTracer;
1.22 +
1.23 +struct WatchKey {
1.24 + WatchKey() {}
1.25 + WatchKey(JSObject *obj, jsid id) : object(obj), id(id) {}
1.26 + WatchKey(const WatchKey &key) : object(key.object.get()), id(key.id.get()) {}
1.27 + EncapsulatedPtrObject object;
1.28 + EncapsulatedId id;
1.29 +
1.30 + bool operator!=(const WatchKey &other) const {
1.31 + return object != other.object || id != other.id;
1.32 + }
1.33 +};
1.34 +
1.35 +struct Watchpoint {
1.36 + JSWatchPointHandler handler;
1.37 + EncapsulatedPtrObject closure; /* This is always marked in minor GCs and so doesn't require a postbarrier. */
1.38 + bool held; /* true if currently running handler */
1.39 + Watchpoint(JSWatchPointHandler handler, JSObject* closure, bool held)
1.40 + : handler(handler), closure(closure), held(held) {}
1.41 +};
1.42 +
1.43 +template <>
1.44 +struct DefaultHasher<WatchKey>
1.45 +{
1.46 + typedef WatchKey Lookup;
1.47 + static inline js::HashNumber hash(const Lookup &key);
1.48 +
1.49 + static bool match(const WatchKey &k, const Lookup &l) {
1.50 + return k.object == l.object && k.id.get() == l.id.get();
1.51 + }
1.52 +
1.53 + static void rekey(WatchKey &k, const WatchKey& newKey) {
1.54 + k.object.unsafeSet(newKey.object);
1.55 + k.id.unsafeSet(newKey.id);
1.56 + }
1.57 +};
1.58 +
1.59 +class WatchpointMap {
1.60 + public:
1.61 + typedef HashMap<WatchKey, Watchpoint, DefaultHasher<WatchKey>, SystemAllocPolicy> Map;
1.62 +
1.63 + bool init();
1.64 + bool watch(JSContext *cx, HandleObject obj, HandleId id,
1.65 + JSWatchPointHandler handler, HandleObject closure);
1.66 + void unwatch(JSObject *obj, jsid id,
1.67 + JSWatchPointHandler *handlerp, JSObject **closurep);
1.68 + void unwatchObject(JSObject *obj);
1.69 + void clear();
1.70 +
1.71 + bool triggerWatchpoint(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp);
1.72 +
1.73 + static bool markCompartmentIteratively(JSCompartment *c, JSTracer *trc);
1.74 + bool markIteratively(JSTracer *trc);
1.75 + void markAll(JSTracer *trc);
1.76 + static void sweepAll(JSRuntime *rt);
1.77 + void sweep();
1.78 +
1.79 + static void traceAll(WeakMapTracer *trc);
1.80 + void trace(WeakMapTracer *trc);
1.81 +
1.82 + private:
1.83 + Map map;
1.84 +};
1.85 +
1.86 +}
1.87 +
1.88 +#endif /* jswatchpoint_h */
