Re: Exiting non-POSIX threads?
Re: Exiting non-POSIX threads?
- Subject: Re: Exiting non-POSIX threads?
- From: Kevin Meaney <email@hidden>
- Date: Mon, 29 Jul 2013 16:20:55 +0100
Perhaps OP should be looking at using an xpc service.
Kevin
On 29 Jul 2013, at 15:54, Ken Thomases <email@hidden> wrote:
> On Jul 29, 2013, at 4:54 AM, Oleg Krupnov wrote:
>
>> Thanks for your answer, Steve, but the problem remains.
>>
>> In my case, the exception has already been thrown inside the block and
>> I cannot catch it or modify it in any way in my handler. I'm basically
>> writing an uncaught exception handler. My app should show a crash
>> report window and then terminate itself.
>>
>> The problem is that if the exception happens in another thread, the
>> app gets instantly terminated by the system after my exception handler
>> (unlike exceptions in the main thread that are automatically
>> absorbed), unless I terminate the crashed thread manually. [NSThread
>> exit] worked with NSThreads, but with GCD threads (starting from
>> start_wqthread), it's causing the signal.
>
> Look into the ExceptionHandling framework and/or the NSSetUncaughtExceptionHandler() function.
> https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Exceptions/Tasks/ControllingAppResponse.html#//apple_ref/doc/uid/20000473-BBCHGJIJ
>
> However, you're not supposed to let exceptions escape from blocks which you submit to dispatch queues. That's documented in the link I gave in my previous reply.
>
> If you exit a thread that you don't own, you may screw up your app's ability to present a dialog. Perhaps AppKit relies on that thread. Perhaps the thread held a crucial resource and other threads will deadlock when they try to access it.
>
> All in all, what you're doing seems like a bad idea.
>
> Regards,
> Ken
>
>
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