Re: Can't trap uncaught exceptions on Snow Leopard
On Sat, 19 Dec 2009 13:27:01 +0200, Oleg Krupnov
said:
>Anyway, I have just found that the following code works:
>
>NSExceptionHandler *handler = [NSExceptionHandler defaultExceptionHandler];
> [handler setExceptionHandlingMask:NSLogAndHandleEveryExceptionMask];
> [handler setDelegate:self];
>
>The delegate method DOES get called:
>
>- (BOOL)exceptionHandler:(NSExceptionHandler *)sender
>shouldHandleException:(NSException *)exception mask:(unsigned
>int)aMask
>{ [NSApp reportException:exception];
> return YES;
But this has nothing to do with Snow Leopard. I've got projects going back
many years that use that code. m.
--
matt neuburg, phd = m...@tidbits.com,
Re: Can't trap uncaught exceptions on Snow Leopard
Thanks Ken,
By "uncaught" I mean an exception for which I do not set any handlers
in my own code, and let it bubble up until it is handled by some
default mechanism, be it NSApp default handler, NSExceptionHandler,
NSSetUncaughtExceptionHandler or whatever. AFAIU, in Cocoa apps, it's
NSApp that intercepts these exceptions, so that the
NSSetUncaughtExceptionHandler handler never gets called. On Leopard,
[NSApp reportException] used to be a valid way of "injecting my code",
but it no longer gets called on Snow Leopard. :(
I am testing an exception produced by NSAssert, that is
NSInternalInconsistencyException. It doesn't seem to be a C++
exception to me, is it?
Anyway, I have just found that the following code works:
NSExceptionHandler *handler = [NSExceptionHandler defaultExceptionHandler];
[handler setExceptionHandlingMask:NSLogAndHandleEveryExceptionMask];
[handler setDelegate:self];
The delegate method DOES get called:
- (BOOL)exceptionHandler:(NSExceptionHandler *)sender
shouldHandleException:(NSException *)exception mask:(unsigned
int)aMask
{ [NSApp reportException:exception];
return YES;
}
However, somehow the [exception callStackReturnAddresses] is nil,
which is now another problem for me :(
Oleg.
On Sat, Dec 19, 2009 at 1:15 PM, Ken Thomases wrote:
> On Dec 19, 2009, at 4:56 AM, Oleg Krupnov wrote:
>
>> On Fri, Dec 18, 2009 at 1:48 AM, Ken Thomases wrote:
>>>
>>> On Dec 17, 2009, at 8:41 AM, Oleg Krupnov wrote:
>>>
On Leopard, I used to override [NSApp reportException:] method to
track all uncaught exceptions that occur in my app.
However, I have just discovered that on Snow Leopard, this method
never gets called. Instead, the application handles the exception
somewhere inside and I only get this message in the console:
HIToolbox: ignoring exception 'Test crash' that raised inside Carbon
event dispatch
How to work around this and receive the uncaught exceptions somehow?
>>>
>>> Have you looked at the NSExceptionHandler class and the accompanying
>>> guide?
>>
>> Yes, I tried it but it does not seem to have any effect.
>>
>> I checked the [[NSExceptionHandler defaultExceptionHandler]
>> exceptionHandlingMask], and it's 0. I tried to set it to various
>> combinations, but nothing changes in the behavior of the app.
>>
>> I also tried NSSetUncaughtExceptionHandler, but it does not work either.
>>
>> Any ideas? Thanks!
>
> On taking a second look at the particular exception, it's inside HIToolbox
> and Carbon. It's almost surely a C++ exception. It won't be visible to the
> Cocoa/Objective-C exception handling mechanisms. Also, I don't believe
> there's any way to inject your own handling between the point where it's
> thrown and caught if that's all inside of code you don't control. You
> should be able to break on the C++ throw in the debugger, though.
>
> Also, you keep referring to the exception as uncaught when it clearly is
> caught. What do you think is logging that message if not an exception
> handler?
>
> Regards,
> Ken
>
>
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Re: Can't trap uncaught exceptions on Snow Leopard
On Dec 19, 2009, at 4:56 AM, Oleg Krupnov wrote: On Fri, Dec 18, 2009 at 1:48 AM, Ken Thomases wrote: On Dec 17, 2009, at 8:41 AM, Oleg Krupnov wrote: On Leopard, I used to override [NSApp reportException:] method to track all uncaught exceptions that occur in my app. However, I have just discovered that on Snow Leopard, this method never gets called. Instead, the application handles the exception somewhere inside and I only get this message in the console: HIToolbox: ignoring exception 'Test crash' that raised inside Carbon event dispatch How to work around this and receive the uncaught exceptions somehow? Have you looked at the NSExceptionHandler class and the accompanying guide? Yes, I tried it but it does not seem to have any effect. I checked the [[NSExceptionHandler defaultExceptionHandler] exceptionHandlingMask], and it's 0. I tried to set it to various combinations, but nothing changes in the behavior of the app. I also tried NSSetUncaughtExceptionHandler, but it does not work either. Any ideas? Thanks! On taking a second look at the particular exception, it's inside HIToolbox and Carbon. It's almost surely a C++ exception. It won't be visible to the Cocoa/Objective-C exception handling mechanisms. Also, I don't believe there's any way to inject your own handling between the point where it's thrown and caught if that's all inside of code you don't control. You should be able to break on the C++ throw in the debugger, though. Also, you keep referring to the exception as uncaught when it clearly is caught. What do you think is logging that message if not an exception handler? Regards, Ken ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Can't trap uncaught exceptions on Snow Leopard
Yes, I tried it but it does not seem to have any effect. I checked the [[NSExceptionHandler defaultExceptionHandler] exceptionHandlingMask], and it's 0. I tried to set it to various combinations, but nothing changes in the behavior of the app. I also tried NSSetUncaughtExceptionHandler, but it does not work either. Any ideas? Thanks! On Fri, Dec 18, 2009 at 1:48 AM, Ken Thomases wrote: > On Dec 17, 2009, at 8:41 AM, Oleg Krupnov wrote: > >> On Leopard, I used to override [NSApp reportException:] method to >> track all uncaught exceptions that occur in my app. >> >> However, I have just discovered that on Snow Leopard, this method >> never gets called. Instead, the application handles the exception >> somewhere inside and I only get this message in the console: >> >> HIToolbox: ignoring exception 'Test crash' that raised inside Carbon >> event dispatch >> >> How to work around this and receive the uncaught exceptions somehow? > > Have you looked at the NSExceptionHandler class and the accompanying guide? > > Cheers, > Ken > > ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Can't trap uncaught exceptions on Snow Leopard
On Dec 17, 2009, at 8:41 AM, Oleg Krupnov wrote: > On Leopard, I used to override [NSApp reportException:] method to > track all uncaught exceptions that occur in my app. > > However, I have just discovered that on Snow Leopard, this method > never gets called. Instead, the application handles the exception > somewhere inside and I only get this message in the console: > > HIToolbox: ignoring exception 'Test crash' that raised inside Carbon > event dispatch > > How to work around this and receive the uncaught exceptions somehow? Have you looked at the NSExceptionHandler class and the accompanying guide? Cheers, Ken ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Can't trap uncaught exceptions on Snow Leopard
On 17 груд. 2009, at 16:44, Oleg Krupnov wrote: > On Leopard, I used to override [NSApp reportException:] method to > track all uncaught exceptions that occur in my app. > > ... > > How to work around this and receive the uncaught exceptions somehow? > > Thanks! You can take a look at this project for examples of source code - http://github.com/tcurdt/feedbackreporter Thanks, Vera Tkachenko ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Can't trap uncaught exceptions on Snow Leopard
On Leopard, I used to override [NSApp reportException:] method to track all uncaught exceptions that occur in my app. However, I have just discovered that on Snow Leopard, this method never gets called. Instead, the application handles the exception somewhere inside and I only get this message in the console: HIToolbox: ignoring exception 'Test crash' that raised inside Carbon event dispatch How to work around this and receive the uncaught exceptions somehow? Thanks! ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
