[webkit-reviews] review granted: [Bug 221620] Make Caches::writeRecord and Caches::readRecord more robust : [Attachment 419748] Patch

[bugzilla-daemon at webkit.org]

youenn fablet <youennf at gmail.com> has granted Alex Christensen
<achristensen at apple.com>'s request for review:
Bug 221620: Make Caches::writeRecord and Caches::readRecord more robust
https://bugs.webkit.org/show_bug.cgi?id=221620

Attachment 419748: Patch

https://bugs.webkit.org/attachment.cgi?id=419748&action=review




--- Comment #4 from youenn fablet <youennf at gmail.com> ---
Comment on attachment 419748
  --> https://bugs.webkit.org/attachment.cgi?id=419748
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=419748&action=review

> Source/WebKit/ChangeLog:9
> +	   Some events happen during teardown.	No reason to crash.

This seems ok to add a null check.
The underlying issue is probably that:
- we request space, which is an asynchronous operation as we may prompt user
- somehow we are requested to clear the caches
- user grants request space and we are back with no available storage.

I think this can be fixed by bailing out early in Caches::requestSpace callback
in case m_isInitialized is false.