Re: VS Debugger Vs Exceptions
Jon Watte <jwatte <at> gmail.com>
2009-08-23 21:00:22 GMT
Ah, it's a structured exception, not a regular exception. Those are
handled either by a __except, or by a SetUnhandledExceptionHandler (or
whatever that Win32 function is called -- something like that)
F11 to "step in," and clicking "pass the exception to the program *might* work.
Is your app MFC? MFC silently catches segfaults and goes back to the
main loop. That's got to be one of the dumbest design decisions I've
ever seen...
Sincerely,
Jw
On 8/23/09, James Robertson <jamesr <at> funcom.com> wrote:
> Because I'm not convinced the catch is in my code.
>
> Actually, I'm not convinced that an exception is being caught at all
> after looking at this a bit more yesterday.
>
> What I know for sure is:
>
> 1) An access violation occurs inside the nvidia display driver while
> processing a call to Present. (Vista64, latest drivers, never happened
> before I updated the drivers two days ago.)
> 2) The debugger breaks, of course, and I can roughly see the callstack.
> (No symbols for the nvidia driver, but the bottom of the callstack looks
> correct.)
> 3) If the debugger exception settings aren't set to break when thrown
> the debugger quietly notes the access violation and execution continues.
> 4) The application does not crash (leading me to believe something
> somewhere is handling the exception) but the stack doesn't appear to be
> unwound, and subsequently Things Happen (tm).
>
> If I set a breakpoint at the top of the function that calls Present I
> can step through until I hit the Present call, hit F10 to step over it
> and the next thing I know is I'm back at my breakpoint again. (And a
> breakpoint after the call to Present isn't hit either.) I tried putting
> a few breakpoints in destructors of known local objects (thanks for that
> sneaky suggestion, Bert) but they weren't hit either.
>
>
>
> Kris Lamb wrote:
>> Not sure if maybe this is too obvious/tidious and you already tried
>> this, but why not set break points in all your catch statements?
>>
>> On Sat, Aug 22, 2009 at 4:32 AM, James Robertson <jamesr <at> funcom.com
>> <mailto:jamesr <at> funcom.com>> wrote:
>>
>> Ah, but I want to see *where* it was handled.
>>
>>
>> Andrew Finkenstadt wrote:
>>
>> On Fri, Aug 21, 2009 at 9:34 AM, James Robertson
>> <jamesr <at> funcom.com <mailto:jamesr <at> funcom.com>
>> <mailto:jamesr <at> funcom.com <mailto:jamesr <at> funcom.com>>> wrote:
>>
>> Hi,
>>
>> Anyone know whether it's possible to step to where an exception
>> will be caught when the VS debugger passes it on to the
>> application being debugged?
>>
>> James
>>
>>
>> Yes.
>>
>> In visual studio, configure your debug -> exception settings
>> to catch when thrown, as well as when it was not handled.
>>
>> --Andy
>>
>>
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