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86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef jswatchpoint_h
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#define jswatchpoint_h
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#include "jsalloc.h"
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#include "gc/Barrier.h"
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#include "js/HashTable.h"
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#include "js/OldDebugAPI.h"
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namespace js {
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struct WeakMapTracer;
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struct WatchKey {
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WatchKey() {}
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WatchKey(JSObject *obj, jsid id) : object(obj), id(id) {}
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WatchKey(const WatchKey &key) : object(key.object.get()), id(key.id.get()) {}
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EncapsulatedPtrObject object;
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EncapsulatedId id;
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bool operator!=(const WatchKey &other) const {
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return object != other.object || id != other.id;
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}
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};
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struct Watchpoint {
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JSWatchPointHandler handler;
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EncapsulatedPtrObject closure; /* This is always marked in minor GCs and so doesn't require a postbarrier. */
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bool held; /* true if currently running handler */
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Watchpoint(JSWatchPointHandler handler, JSObject* closure, bool held)
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: handler(handler), closure(closure), held(held) {}
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};
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template <>
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struct DefaultHasher<WatchKey>
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{
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typedef WatchKey Lookup;
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static inline js::HashNumber hash(const Lookup &key);
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static bool match(const WatchKey &k, const Lookup &l) {
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return k.object == l.object && k.id.get() == l.id.get();
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}
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static void rekey(WatchKey &k, const WatchKey& newKey) {
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k.object.unsafeSet(newKey.object);
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k.id.unsafeSet(newKey.id);
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}
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};
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class WatchpointMap {
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public:
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typedef HashMap<WatchKey, Watchpoint, DefaultHasher<WatchKey>, SystemAllocPolicy> Map;
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bool init();
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bool watch(JSContext *cx, HandleObject obj, HandleId id,
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JSWatchPointHandler handler, HandleObject closure);
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void unwatch(JSObject *obj, jsid id,
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JSWatchPointHandler *handlerp, JSObject **closurep);
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void unwatchObject(JSObject *obj);
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void clear();
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bool triggerWatchpoint(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp);
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static bool markCompartmentIteratively(JSCompartment *c, JSTracer *trc);
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bool markIteratively(JSTracer *trc);
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void markAll(JSTracer *trc);
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static void sweepAll(JSRuntime *rt);
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void sweep();
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static void traceAll(WeakMapTracer *trc);
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void trace(WeakMapTracer *trc);
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private:
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Map map;
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};
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}
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#endif /* jswatchpoint_h */
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