Bug 118533 – WebResourceCacheManager::cfURLCacheHostNamesWithCallback leaks an array (pointed out by the clang static analyzer)

• Component: WebKit2
• Status: RESOLVED FIXED

[Jessie Berlin]

#if ENABLE(CACHE_PARTITIONING)
void WebResourceCacheManager::cfURLCacheHostNamesWithCallback(CacheCallback callback)
{
    WKCFURLCacheCopyAllPartitionNames(^(CFArrayRef partitionNames) {
        CFMutableArrayRef hostNames = CFArrayCreateMutableCopy(0, 0, WKCFURLCacheCopyAllHostNamesInPersistentStoreForPartition(CFSTR("")));
        CFArrayAppendArray(hostNames, partitionNames, CFRangeMake(0, CFArrayGetCount(partitionNames)));
        CFRelease(partitionNames);
        callback(adoptCF(hostNames));
    });
}
#endif

The array returned by the call to WKCFURLCacheCopyAllHostNamesInPersistentStoreForPartition(CFSTR("”)) is getting leaked.

[Jessie Berlin]

Created attachment 206395 [details]
Patch

[Anders Carlsson]

Comment on attachment 206395 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=206395&action=review

> Source/WebKit2/WebProcess/ResourceCache/cf/WebResourceCacheManagerCFNet.cpp:68
> +        CFMutableArrayRef hostNames = CFArrayCreateMutableCopy(0, 0, hostNamesInPersistentStore.get());

I think you can use a RetainPtr here (with adoptCF).

> Source/WebKit2/WebProcess/ResourceCache/cf/WebResourceCacheManagerCFNet.cpp:71
>          callback(adoptCF(hostNames));

and then just call std::move(hostNames) here.

[Jessie Berlin]

(In reply to comment #2)
> (From update of attachment 206395 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=206395&action=review
> 
> > Source/WebKit2/WebProcess/ResourceCache/cf/WebResourceCacheManagerCFNet.cpp:68
> > +        CFMutableArrayRef hostNames = CFArrayCreateMutableCopy(0, 0, hostNamesInPersistentStore.get());
> 
> I think you can use a RetainPtr here (with adoptCF).

Done.

> 
> > Source/WebKit2/WebProcess/ResourceCache/cf/WebResourceCacheManagerCFNet.cpp:71
> >          callback(adoptCF(hostNames));
> 
> and then just call std::move(hostNames) here.

Done.

Thanks for the review!

[Jessie Berlin]

Comment on attachment 206395 [details]
Patch

Committed in http://trac.webkit.org/changeset/152578