gecko/js/src/jswatchpoint.h

86 lines
2.5 KiB
C++

/* -*- 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/. */
#ifndef jswatchpoint_h
#define jswatchpoint_h
#include "jsalloc.h"
#include "gc/Barrier.h"
#include "js/HashTable.h"
#include "js/OldDebugAPI.h"
namespace js {
struct WeakMapTracer;
struct WatchKey {
WatchKey() {}
WatchKey(JSObject *obj, jsid id) : object(obj), id(id) {}
WatchKey(const WatchKey &key) : object(key.object.get()), id(key.id.get()) {}
EncapsulatedPtrObject object;
EncapsulatedId id;
bool operator!=(const WatchKey &other) const {
return object != other.object || id != other.id;
}
};
struct Watchpoint {
JSWatchPointHandler handler;
EncapsulatedPtrObject closure; /* This is always marked in minor GCs and so doesn't require a postbarrier. */
bool held; /* true if currently running handler */
Watchpoint(JSWatchPointHandler handler, JSObject* closure, bool held)
: handler(handler), closure(closure), held(held) {}
};
template <>
struct DefaultHasher<WatchKey>
{
typedef WatchKey Lookup;
static inline js::HashNumber hash(const Lookup &key);
static bool match(const WatchKey &k, const Lookup &l) {
return k.object == l.object && k.id.get() == l.id.get();
}
static void rekey(WatchKey &k, const WatchKey& newKey) {
k.object.unsafeSet(newKey.object);
k.id.unsafeSet(newKey.id);
}
};
class WatchpointMap {
public:
typedef HashMap<WatchKey, Watchpoint, DefaultHasher<WatchKey>, SystemAllocPolicy> Map;
bool init();
bool watch(JSContext *cx, HandleObject obj, HandleId id,
JSWatchPointHandler handler, HandleObject closure);
void unwatch(JSObject *obj, jsid id,
JSWatchPointHandler *handlerp, JSObject **closurep);
void unwatchObject(JSObject *obj);
void clear();
bool triggerWatchpoint(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp);
static bool markCompartmentIteratively(JSCompartment *c, JSTracer *trc);
bool markIteratively(JSTracer *trc);
void markAll(JSTracer *trc);
static void sweepAll(JSRuntime *rt);
void sweep();
static void traceAll(WeakMapTracer *trc);
void trace(WeakMapTracer *trc);
private:
Map map;
};
}
#endif /* jswatchpoint_h */