https://github.com/mozilla/gecko-dev
Tip revision: 8f65d78aea7a1e4b942fdae0ec0b861937b0fe68 authored by ffxbld on 08 February 2012, 13:55:55 UTC
Added tag FENNEC_10_0_1_BUILD1 for changeset 976d144a254c. CLOSED TREE a=release
Added tag FENNEC_10_0_1_BUILD1 for changeset 976d144a254c. CLOSED TREE a=release
Tip revision: 8f65d78
jsfriendapi.cpp
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=4 sw=4 et tw=99:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is SpiderMonkey code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "jscntxt.h"
#include "jscompartment.h"
#include "jsfriendapi.h"
#include "jswrapper.h"
#include "jsobjinlines.h"
using namespace js;
using namespace JS;
JS_FRIEND_API(void)
JS_SetGrayGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
{
rt->gcGrayRootsTraceOp = traceOp;
rt->gcGrayRootsData = data;
}
JS_FRIEND_API(JSString *)
JS_GetAnonymousString(JSRuntime *rt)
{
JS_ASSERT(rt->state == JSRTS_UP);
return rt->atomState.anonymousAtom;
}
JS_FRIEND_API(JSObject *)
JS_FindCompilationScope(JSContext *cx, JSObject *obj)
{
/*
* We unwrap wrappers here. This is a little weird, but it's what's being
* asked of us.
*/
if (obj->isWrapper())
obj = UnwrapObject(obj);
/*
* Innerize the target_obj so that we compile in the correct (inner)
* scope.
*/
if (JSObjectOp op = obj->getClass()->ext.innerObject)
obj = op(cx, obj);
return obj;
}
JS_FRIEND_API(JSFunction *)
JS_GetObjectFunction(JSObject *obj)
{
if (obj->isFunction())
return obj->getFunctionPrivate();
return NULL;
}
JS_FRIEND_API(JSObject *)
JS_GetGlobalForFrame(JSStackFrame *fp)
{
return Valueify(fp)->scopeChain().getGlobal();
}
JS_FRIEND_API(JSBool)
JS_SplicePrototype(JSContext *cx, JSObject *obj, JSObject *proto)
{
/*
* Change the prototype of an object which hasn't been used anywhere
* and does not share its type with another object. Unlike JS_SetPrototype,
* does not nuke type information for the object.
*/
CHECK_REQUEST(cx);
if (!obj->hasSingletonType()) {
/*
* We can see non-singleton objects when trying to splice prototypes
* due to mutable __proto__ (ugh).
*/
return JS_SetPrototype(cx, obj, proto);
}
return obj->splicePrototype(cx, proto);
}
JS_FRIEND_API(JSObject *)
JS_NewObjectWithUniqueType(JSContext *cx, JSClass *clasp, JSObject *proto, JSObject *parent)
{
JSObject *obj = JS_NewObject(cx, clasp, proto, parent);
if (!obj || !obj->setSingletonType(cx))
return NULL;
return obj;
}
JS_FRIEND_API(uint32)
JS_ObjectCountDynamicSlots(JSObject *obj)
{
if (obj->hasSlotsArray())
return obj->numDynamicSlots(obj->numSlots());
return 0;
}
JS_FRIEND_API(JSPrincipals *)
JS_GetCompartmentPrincipals(JSCompartment *compartment)
{
return compartment->principals;
}
JS_FRIEND_API(JSBool)
JS_WrapPropertyDescriptor(JSContext *cx, js::PropertyDescriptor *desc)
{
return cx->compartment->wrap(cx, desc);
}
JS_FRIEND_API(void *)
JS_TraceShapeChildrenAcyclic(JSTracer *trc, void *shape)
{
return (void *)MarkShapeChildrenAcyclic(trc, (const Shape *)shape);
}
AutoPreserveCompartment::AutoPreserveCompartment(JSContext *cx
JS_GUARD_OBJECT_NOTIFIER_PARAM_NO_INIT)
: cx(cx), oldCompartment(cx->compartment)
{
JS_GUARD_OBJECT_NOTIFIER_INIT;
}
AutoPreserveCompartment::~AutoPreserveCompartment()
{
/* The old compartment may have been destroyed, so we can't use cx->setCompartment. */
cx->compartment = oldCompartment;
}
AutoSwitchCompartment::AutoSwitchCompartment(JSContext *cx, JSCompartment *newCompartment
JS_GUARD_OBJECT_NOTIFIER_PARAM_NO_INIT)
: cx(cx), oldCompartment(cx->compartment)
{
JS_GUARD_OBJECT_NOTIFIER_INIT;
cx->setCompartment(newCompartment);
}
AutoSwitchCompartment::AutoSwitchCompartment(JSContext *cx, JSObject *target
JS_GUARD_OBJECT_NOTIFIER_PARAM_NO_INIT)
: cx(cx), oldCompartment(cx->compartment)
{
JS_GUARD_OBJECT_NOTIFIER_INIT;
cx->setCompartment(target->compartment());
}
AutoSwitchCompartment::~AutoSwitchCompartment()
{
/* The old compartment may have been destroyed, so we can't use cx->setCompartment. */
cx->compartment = oldCompartment;
}
#ifdef DEBUG
JS_FRIEND_API(void)
js::CheckReservedSlot(const JSObject *obj, size_t slot)
{
CheckSlot(obj, slot);
JS_ASSERT(slot < JSSLOT_FREE(obj->getClass()));
}
JS_FRIEND_API(void)
js::CheckSlot(const JSObject *obj, size_t slot)
{
JS_ASSERT(slot < obj->numSlots());
}
#endif
/*
* The below code is for temporary telemetry use. It can be removed when
* sufficient data has been harvested.
*/
extern size_t sE4XObjectsCreated;
JS_FRIEND_API(size_t)
JS_GetE4XObjectsCreated(JSContext *)
{
return sE4XObjectsCreated;
}
extern size_t sSetProtoCalled;
JS_FRIEND_API(size_t)
JS_SetProtoCalled(JSContext *)
{
return sSetProtoCalled;
}
extern size_t sCustomIteratorCount;
JS_FRIEND_API(size_t)
JS_GetCustomIteratorCount(JSContext *cx)
{
return sCustomIteratorCount;
}
JS_FRIEND_API(void)
JS_SetAccumulateTelemetryCallback(JSRuntime *rt, JSAccumulateTelemetryDataCallback callback)
{
rt->telemetryCallback = callback;
}
#ifdef DEBUG
struct DumpingChildInfo {
void *node;
JSGCTraceKind kind;
DumpingChildInfo (void *n, JSGCTraceKind k)
: node(n), kind(k)
{}
};
typedef HashSet<void *, DefaultHasher<void *>, ContextAllocPolicy> PtrSet;
struct JSDumpHeapTracer : public JSTracer {
PtrSet visited;
FILE *output;
Vector<DumpingChildInfo, 0, ContextAllocPolicy> nodes;
char buffer[200];
bool rootTracing;
JSDumpHeapTracer(JSContext *cx, FILE *fp)
: visited(cx), output(fp), nodes(cx)
{}
};
static void
DumpHeapVisitChild(JSTracer *trc, void *thing, JSGCTraceKind kind);
static void
DumpHeapPushIfNew(JSTracer *trc, void *thing, JSGCTraceKind kind)
{
JS_ASSERT(trc->callback == DumpHeapPushIfNew ||
trc->callback == DumpHeapVisitChild);
JSDumpHeapTracer *dtrc = static_cast<JSDumpHeapTracer *>(trc);
/*
* If we're tracing roots, print root information. Do this even if we've
* already seen thing, for complete root information.
*/
if (dtrc->rootTracing) {
fprintf(dtrc->output, "%p %s\n", thing,
JS_GetTraceEdgeName(dtrc, dtrc->buffer, sizeof(dtrc->buffer)));
}
PtrSet::AddPtr ptrEntry = dtrc->visited.lookupForAdd(thing);
if (ptrEntry || !dtrc->visited.add(ptrEntry, thing))
return;
dtrc->nodes.append(DumpingChildInfo(thing, kind));
}
static void
DumpHeapVisitChild(JSTracer *trc, void *thing, JSGCTraceKind kind)
{
JS_ASSERT(trc->callback == DumpHeapVisitChild);
JSDumpHeapTracer *dtrc = static_cast<JSDumpHeapTracer *>(trc);
const char *edgeName = JS_GetTraceEdgeName(dtrc, dtrc->buffer, sizeof(dtrc->buffer));
fprintf(dtrc->output, "> %p %s\n", (void *)thing, edgeName);
DumpHeapPushIfNew(dtrc, thing, kind);
}
void
js::DumpHeapComplete(JSContext *cx, FILE *fp)
{
JSDumpHeapTracer dtrc(cx, fp);
JS_TRACER_INIT(&dtrc, cx, DumpHeapPushIfNew);
if (!dtrc.visited.init(10000))
return;
/* Store and log the root information. */
dtrc.rootTracing = true;
TraceRuntime(&dtrc);
fprintf(dtrc.output, "==========\n");
/* Log the graph. */
dtrc.rootTracing = false;
dtrc.callback = DumpHeapVisitChild;
while (!dtrc.nodes.empty()) {
DumpingChildInfo dci = dtrc.nodes.popCopy();
JS_PrintTraceThingInfo(dtrc.buffer, sizeof(dtrc.buffer),
&dtrc, dci.node, dci.kind, JS_TRUE);
fprintf(fp, "%p %s\n", dci.node, dtrc.buffer);
JS_TraceChildren(&dtrc, dci.node, dci.kind);
}
dtrc.visited.finish();
}
#endif