Re: Crashes in _Unwind_Resume
Re: Crashes in _Unwind_Resume
- Subject: Re: Crashes in _Unwind_Resume
- From: Roland King <email@hidden>
- Date: Thu, 26 Aug 2010 08:20:29 +0800
I've had some of those crashes recently too. In my case I tracked it down to some bad code I'd written in a KVO method which was throwing an exception when it was getting called for an update. Instead of seeing the error (invalid selector I think it was) the app just crashed, when put under the debugger I too ended up at _unwind_resume.
Adding a try/catch around some main bits of the app found the real issue for me.
On Aug 26, 2010, at 4:11, vincent habchi <email@hidden> wrote:
> Le 25 août 2010 à 19:39, Benjamin Rister a écrit :
>
>> On Aug 25, 2010, at 10:48 AM, vincent habchi wrote:
>>
>>> If you use plain GCC 4.2 instead, does it also crash?
>>
>> Well, it’s hard to say, since it doesn’t happen on demand. I’d have to make a new build and push it out to users to see if the reports stopped coming in.
>
> Ok, that's a commercial app. I though it was only a prototype.
>
>> Do you have some experience that this is a compiler bug, or is it just a guess because it involves exception machinery? I would expect that LLVM’s exception handling is pretty well broken-in by now, considering the volume of Obj-C and C++ code that Apple has shipped using it so far. Which isn’t to say that that couldn’t be the problem, but I don’t want to annoy users by putting out a bunch of releases that apparently are unchanged while I blindly flail about behind the scenes, hoping something fixes it.
>
> By the way, both thread 0 and 2 seem to be in the same routine by the time it crashes. Are you sure all your variables are thread safe?
>
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