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Bug 1202085 - Part 6: Clear the entries in the image cache belonging to a controlled document when it gets destroyed; r=seth

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This commit is contained in:
Ehsan Akhgari 2015-10-28 16:01:07 -04:00
parent 3a539c9718
commit e5b08c2286
4 changed files with 40 additions and 3 deletions
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10
dom/base/nsDocument.cpp
View File

@ -70,7 +70,8 @@
#include "mozilla/dom/TreeWalker.h"
#include "nsIServiceManager.h"
#include "nsIServiceWorkerManager.h"
#include "mozilla/dom/workers/ServiceWorkerManager.h"
#include "imgLoader.h"
#include "nsCanvasFrame.h"
#include "nsContentCID.h"
@ -8893,8 +8894,13 @@ nsDocument::Destroy()
mRegistry = nullptr;
nsCOMPtr<nsIServiceWorkerManager> swm = mozilla::services::GetServiceWorkerManager();
using mozilla::dom::workers::ServiceWorkerManager;
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (swm) {
ErrorResult error;
if (swm->IsControlled(this, error)) {
nsContentUtils::GetImgLoaderForDocument(this)->ClearCacheForControlledDocument(this);
}
swm->MaybeStopControlling(this);
}

4
image/ImageCacheKey.h
View File

@ -46,6 +46,10 @@ public:
/// Is this cache entry for a chrome image?
bool IsChrome() const { return mIsChrome; }
/// A token indicating which service worker controlled document this entry
/// belongs to, if any.
void* ControlledDocument() const { return mControlledDocument; }
private:
static uint32_t ComputeHash(ImageURL* aURI,
const Maybe<uint64_t>& aBlobSerial,

10
image/imgICache.idl
View File

@ -7,6 +7,7 @@
#include "nsISupports.idl"
interface imgIRequest;
interface nsIDocument;
interface nsIDOMDocument;
interface nsIProperties;
interface nsIURI;
@ -18,7 +19,7 @@ interface nsIURI;
* @version 0.1
* @see imagelib2
*/
[scriptable, builtinclass, uuid(6c1e3f96-4701-4c75-9883-217a790a53e2)]
[scriptable, builtinclass, uuid(bfdf23ff-378e-402e-8a6c-840f0c82b6c3)]
interface imgICache : nsISupports
{
/**
@ -52,4 +53,11 @@ interface imgICache : nsISupports
* last-pb-context-exited notification is observed.
*/
void respectPrivacyNotifications();
/**
* Clear the image cache for a document. Controlled documents are responsible
* for doing this manually when they get destroyed.
*/
[noscript, notxpcom]
void clearCacheForControlledDocument(in nsIDocument doc);
};

19
image/imgLoader.cpp
View File

@ -1361,6 +1361,25 @@ imgLoader::FindEntryProperties(nsIURI* uri,
return NS_OK;
}
NS_IMETHODIMP_(void)
imgLoader::ClearCacheForControlledDocument(nsIDocument* aDoc)
{
MOZ_ASSERT(aDoc);
nsAutoTArray<RefPtr<imgCacheEntry>, 128> entriesToBeRemoved;
imgCacheTable& cache = GetCache(false);
for (auto iter = cache.Iter(); !iter.Done(); iter.Next()) {
auto& key = iter.Key();
if (key.ControlledDocument() == aDoc) {
entriesToBeRemoved.AppendElement(iter.Data());
}
}
for (auto& entry : entriesToBeRemoved) {
if (!RemoveFromCache(entry)) {
NS_WARNING("Couldn't remove an entry from the cache in ClearCacheForControlledDocument()\n");
}
}
}
void
imgLoader::Shutdown()
{