Bug 69386 – REGRESSION: Curious Location of StorageTracker.db

• Component: WebKit Misc.
• Status: RESOLVED FIXED

[Martin Stricker]

WebKit Version 5.1 (6534.50, r96515)

Since a few days, WebKit on Mac 10.6.8 creates StorageTracker.db at '/~/Library/Safari/LocalStorage/StorageTracker.db' (directory literally named "~" at root).

Also, extensions like Adblock reinstall on each browser startup.

[Martin Stricker]

This only happens when extensions like Adblock (http://safariadblock.com) are used.

[Alexey Proskuryakov]

<rdar://problem/10235680>

[Alexey Proskuryakov]

<http://trac.webkit.org/changeset/96255> is a suspicious change.

[José Pedro Sousa do Amaral]

I can confirm this bug. In my case, it does not seem to be caused by AdBlock, for I disabled AdBlock and the bug persisted. However when I disabled _all_ extensions, the misplaced StorageTracker.db was no longer created.

5.1 (6534.50, r96636)

[David Kilzer (:ddkilzer)]

Created attachment 109853 [details]
Patch

[Alexey Proskuryakov]

Comment on attachment 109853 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=109853&action=review

> Source/WebKit/mac/Storage/WebStorageManager.mm:93
>      static NSString *sLocalStoragePath;

Is this code only ever running on main thread?

> Source/WebKit/mac/Storage/WebStorageManager.mm:98
>      NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

I wonder why it's reading defaults every time, not just on initialization.

> Source/WebKit/mac/Storage/WebStorageManager.mm:105
> +    sLocalStoragePath = [[sLocalStoragePath stringByStandardizingPath] retain];

This code will retain each time, but the function is not a "copy" one.

[Alexey Proskuryakov]

Comment on attachment 109853 [details]
Patch

My bad. I didn't notice the early return (we usually use a different pattern in WebCore, something like 

static NSString *sLocalStoragePath = calculateStoragePath();

[David Kilzer (:ddkilzer)]

Created attachment 109862 [details]
Now with more thread-safe\!

[Alexey Proskuryakov]

Comment on attachment 109862 [details]
Now with more thread-safe\!

View in context: https://bugs.webkit.org/attachment.cgi?id=109862&action=review

I don't know if thread safety is a real issue for this function, but the patch looks good.

> Source/WebKit/mac/Storage/WebStorageManager.mm:35
> +#import <pthread.h>
>  #import <WebCore/SecurityOrigin.h>
>  #import <WebCore/StorageTracker.h>

Alphabetically, upper case comes first.

[David Kilzer (:ddkilzer)]

Committed r96748: <http://trac.webkit.org/changeset/96748>