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Bug 713462, don't traverse black content lists, r=mccr8

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This commit is contained in:
Olli Pettay 2011-12-29 23:21:33 +02:00
parent fb75702799
commit e29d8131b7
4 changed files with 21 additions and 13 deletions
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9
content/base/src/nsContentList.cpp
View File

@ -47,9 +47,9 @@
#include "nsIDOMNode.h"
#include "nsIDocument.h"
#include "nsGenericElement.h"
#include "nsWrapperCacheInlines.h"
#include "nsContentUtils.h"
#include "nsCCUncollectableMarker.h"
#include "nsGkAtoms.h"
#include "dombindings.h"
@ -80,8 +80,11 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsBaseContentList)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsBaseContentList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY_OF_NSCOMPTR(mElements)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
if (nsCCUncollectableMarker::sGeneration && tmp->IsBlack()) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSTARRAY_OF_NSCOMPTR(mElements)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsBaseContentList)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER

13
content/base/src/nsGenericElement.cpp
View File

@ -1207,13 +1207,6 @@ nsINode::Trace(nsINode *tmp, TraceCallback cb, void *closure)
nsContentUtils::TraceWrapper(tmp, cb, closure);
}
static bool
IsBlackNode(nsINode* aNode)
{
JSObject* o = aNode->GetWrapperPreserveColor();
return o && !xpc_IsGrayGCThing(o);
}
static bool
IsXBL(nsINode* aNode)
{
@ -1233,7 +1226,7 @@ nsINode::Traverse(nsINode *tmp, nsCycleCollectionTraversalCallback &cb)
if (nsCCUncollectableMarker::sGeneration) {
// If we're black no need to traverse.
if (IsBlackNode(tmp)) {
if (tmp->IsBlack()) {
return false;
}
@ -1246,13 +1239,13 @@ nsINode::Traverse(nsINode *tmp, nsCycleCollectionTraversalCallback &cb)
if (!tmp->HasFlag(problematicFlags) && !IsXBL(tmp)) {
// If we're in a black document, return early.
if ((currentDoc && IsBlackNode(currentDoc))) {
if ((currentDoc && currentDoc->IsBlack())) {
return false;
}
// If we're not in anonymous content and we have a black parent,
// return early.
nsIContent* parent = tmp->GetParent();
if (parent && !IsXBL(parent) && IsBlackNode(parent)) {
if (parent && !IsXBL(parent) && parent->IsBlack()) {
NS_ABORT_IF_FALSE(parent->IndexOf(tmp) >= 0, "Parent doesn't own us?");
return false;
}

5
dom/base/nsWrapperCache.h
View File

@ -190,6 +190,11 @@ public:
return nsnull;
}
/**
* Returns true if the object has a non-gray wrapper.
*/
bool IsBlack();
private:
// Only meant to be called by nsContentUtils.
void SetPreservingWrapper(bool aPreserve)

7
dom/base/nsWrapperCacheInlines.h
View File

@ -139,4 +139,11 @@ nsWrapperCache::ClearWrapperIfProxy()
SetWrapperBits(NULL);
}
inline bool
nsWrapperCache::IsBlack()
{
JSObject* o = GetWrapperPreserveColor();
return o && !xpc_IsGrayGCThing(o);
}
#endif /* nsWrapperCache_h___ */