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Bug 782792 - convert XPCJSRuntime::mJSHolders to nsTHashtable. r=bholley

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This commit is contained in:
Andrew McCreight 2012-09-19 09:57:17 -07:00
parent 5a41404d58
commit 3cc4e1e63a
2 changed files with 25 additions and 68 deletions
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91
js/xpconnect/src/XPCJSRuntime.cpp
View File

@ -245,27 +245,11 @@ CompartmentDestroyedCallback(JSFreeOp *fop, JSCompartment *compartment)
return;
}
struct ObjectHolder : public JSDHashEntryHdr
{
void *holder;
nsScriptObjectTracer* tracer;
};
nsresult
XPCJSRuntime::AddJSHolder(void* aHolder, nsScriptObjectTracer* aTracer)
{
if (!mJSHolders.ops)
return NS_ERROR_OUT_OF_MEMORY;
ObjectHolder *entry =
reinterpret_cast<ObjectHolder*>(JS_DHashTableOperate(&mJSHolders,
aHolder,
JS_DHASH_ADD));
if (!entry)
return NS_ERROR_OUT_OF_MEMORY;
entry->holder = aHolder;
entry->tracer = aTracer;
MOZ_ASSERT(aTracer->Trace, "AddJSHolder needs a non-null Trace function");
mJSHolders.Put(aHolder, aTracer);
return NS_OK;
}
@ -273,10 +257,7 @@ XPCJSRuntime::AddJSHolder(void* aHolder, nsScriptObjectTracer* aTracer)
nsresult
XPCJSRuntime::RemoveJSHolder(void* aHolder)
{
if (!mJSHolders.ops)
return NS_ERROR_OUT_OF_MEMORY;
JS_DHashTableOperate(&mJSHolders, aHolder, JS_DHASH_REMOVE);
mJSHolders.Remove(aHolder);
return NS_OK;
}
@ -284,10 +265,7 @@ XPCJSRuntime::RemoveJSHolder(void* aHolder)
nsresult
XPCJSRuntime::TestJSHolder(void* aHolder, bool* aRetval)
{
if (!mJSHolders.ops)
return NS_ERROR_OUT_OF_MEMORY;
*aRetval = !!JS_DHashTableOperate(&mJSHolders, aHolder, JS_DHASH_LOOKUP);
*aRetval = mJSHolders.Get(aHolder, nullptr);
return NS_OK;
}
@ -335,15 +313,12 @@ TraceJSObject(void *aScriptThing, const char *name, void *aClosure)
js_GetGCThingTraceKind(aScriptThing), name);
}
static JSDHashOperator
TraceJSHolder(JSDHashTable *table, JSDHashEntryHdr *hdr, uint32_t number,
void *arg)
static PLDHashOperator
TraceJSHolder(void *holder, nsScriptObjectTracer *&tracer, void *arg)
{
ObjectHolder* entry = reinterpret_cast<ObjectHolder*>(hdr);
tracer->Trace(holder, TraceJSObject, arg);
entry->tracer->Trace(entry->holder, TraceJSObject, arg);
return JS_DHASH_NEXT;
return PL_DHASH_NEXT;
}
static PLDHashOperator
@ -373,8 +348,7 @@ void XPCJSRuntime::TraceXPConnectRoots(JSTracer *trc)
for (XPCRootSetElem *e = mWrappedJSRoots; e ; e = e->GetNextRoot())
static_cast<nsXPCWrappedJS*>(e)->TraceJS(trc);
if (mJSHolders.ops)
JS_DHashTableEnumerate(&mJSHolders, TraceJSHolder, trc);
mJSHolders.Enumerate(TraceJSHolder, trc);
// Trace compartments.
XPCCompartmentSet &set = GetCompartmentSet();
@ -406,22 +380,18 @@ CheckParticipatesInCycleCollection(void *aThing, const char *name, void *aClosur
}
}
static JSDHashOperator
NoteJSHolder(JSDHashTable *table, JSDHashEntryHdr *hdr, uint32_t number,
void *arg)
static PLDHashOperator
NoteJSHolder(void *holder, nsScriptObjectTracer *&tracer, void *arg)
{
ObjectHolder* entry = reinterpret_cast<ObjectHolder*>(hdr);
Closure *closure = static_cast<Closure*>(arg);
closure->cycleCollectionEnabled = false;
entry->tracer->Trace(entry->holder, CheckParticipatesInCycleCollection,
closure);
if (!closure->cycleCollectionEnabled)
return JS_DHASH_NEXT;
tracer->Trace(holder, CheckParticipatesInCycleCollection,
closure);
if (closure->cycleCollectionEnabled)
closure->cb->NoteNativeRoot(holder, tracer);
closure->cb->NoteNativeRoot(entry->holder, entry->tracer);
return JS_DHASH_NEXT;
return PL_DHASH_NEXT;
}
// static
@ -510,9 +480,7 @@ XPCJSRuntime::AddXPConnectRoots(nsCycleCollectionTraversalCallback &cb)
}
Closure closure = { true, &cb };
if (mJSHolders.ops) {
JS_DHashTableEnumerate(&mJSHolders, NoteJSHolder, &closure);
}
mJSHolders.Enumerate(NoteJSHolder, &closure);
// Suspect objects with expando objects.
XPCCompartmentSet &set = GetCompartmentSet();
@ -523,22 +491,18 @@ XPCJSRuntime::AddXPConnectRoots(nsCycleCollectionTraversalCallback &cb)
}
}
static JSDHashOperator
UnmarkJSHolder(JSDHashTable *table, JSDHashEntryHdr *hdr, uint32_t number,
void *arg)
static PLDHashOperator
UnmarkJSHolder(void *holder, nsScriptObjectTracer *&tracer, void *arg)
{
ObjectHolder* entry = reinterpret_cast<ObjectHolder*>(hdr);
entry->tracer->CanSkip(entry->holder, true);
return JS_DHASH_NEXT;
tracer->CanSkip(holder, true);
return PL_DHASH_NEXT;
}
void
XPCJSRuntime::UnmarkSkippableJSHolders()
{
XPCAutoLock lock(mMapLock);
if (mJSHolders.ops) {
JS_DHashTableEnumerate(&mJSHolders, UnmarkJSHolder, nullptr);
}
mJSHolders.Enumerate(UnmarkJSHolder, nullptr);
}
void
@ -1024,7 +988,7 @@ XPCJSRuntime::SizeOfIncludingThis(nsMallocSizeOfFun mallocSizeOf)
// NULL for the second arg; we're not measuring anything hanging off the
// entries in mJSHolders.
n += JS_DHashTableSizeOfExcludingThis(&mJSHolders, NULL, mallocSizeOf);
n += mJSHolders.SizeOfExcludingThis(nullptr, mallocSizeOf);
// There are other XPCJSRuntime members that could be measured; the above
// ones have been seen by DMD to be worth measuring. More stuff may be
@ -1223,11 +1187,6 @@ XPCJSRuntime::~XPCJSRuntime()
delete mDetachedWrappedNativeProtoMap;
}
if (mJSHolders.ops) {
JS_DHashTableFinish(&mJSHolders);
mJSHolders.ops = nullptr;
}
if (mJSRuntime) {
JS_DestroyRuntime(mJSRuntime);
JS_ShutDown();
@ -2202,9 +2161,7 @@ XPCJSRuntime::XPCJSRuntime(nsXPConnect* aXPConnect)
NS_RegisterMemoryReporter(new NS_MEMORY_REPORTER_NAME(XPConnectJSUserCompartmentCount));
NS_RegisterMemoryMultiReporter(new JSCompartmentsMultiReporter);
if (!JS_DHashTableInit(&mJSHolders, JS_DHashGetStubOps(), nullptr,
sizeof(ObjectHolder), 512))
mJSHolders.ops = nullptr;
mJSHolders.Init(512);
mCompartmentSet.init();

2
js/xpconnect/src/xpcprivate.h
View File

@ -904,7 +904,7 @@ private:
XPCRootSetElem *mVariantRoots;
XPCRootSetElem *mWrappedJSRoots;
XPCRootSetElem *mObjectHolderRoots;
JSDHashTable mJSHolders;
nsDataHashtable<nsPtrHashKey<void>, nsScriptObjectTracer*> mJSHolders;
PRLock *mWatchdogLock;
PRCondVar *mWatchdogWakeup;
PRThread *mWatchdogThread;