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8b06fa3c7e
This is another one of those annoying situaitons in XPConnect right now where we can't ask a question without potentially throwing if the answer is no. There's also a bunch of unused cruft in here (like the Perm*Access stuff), so this stuff was ripe for a spring cleaning. Unfortunately, I wasn't able to divide this patch up nicely. Sorry for the big diff. :-( In a nutshell, this patch changes things so that Policy::check() just becomes a predicate that says whether the access is allowed or not. There's the remote possibility that one of the underlying JSAPI calls in a ::check() implementation might throw, so callers to ::check() should check JS_IsExceptionPending afterwards (this doesn't catch OOM, but we can just continue along until the next OOM-triggering operation and throw there). Aside from exceptional cases, callers should call Policy::deny if they want to report the failure. Policy::deny returns success value that should be returned to the wrapper's consumer. |
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