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Re: Breaking into debugger with key press while running GUI app
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Re: Breaking into debugger with key press while running GUI app


  • Subject: Re: Breaking into debugger with key press while running GUI app
  • From: "Sean McBride" <email@hidden>
  • Date: Fri, 31 Mar 2006 10:10:25 -0500
  • Organization: Rogue Research

On 2006-03-30 20:14, Chris Espinosa said:

>> Xcode's debugger has the 'pause' button in its toolbar, which is
>> great.
>> Is there a way to do the same thing with a keypress?  Like in the old
>> days pressing the programmer's switch to break into Macsbug.
>>
>> It would be handy in situations like debugging someone else's code and
>> needing to break into the debugger without moving your app into the
>> background.
>
>On Mac OS X it's not quite as straightforward as a hardware NMI. You
>don't want to interrupt the whole machine, you just want to send a
>signal to a particular process;

Correct.  I am familiar with setting up boot-args to get an NMI, but
that's not what I want here.

>how do you tell it which process?

How does Xcode tell which process to apply the pause button to? :)  I
suppose one might be debugging more than one app at a time with Xcode,
but generally not.

>(I suppose you could write some global doohickey that sends a SIGINT
>to the frontmost process.

Can one use AppleScript to tell Xcode to "pause" the app its debugging?
Then I could write a global doohickey that runs that script.

>But in general you should just either
>Command-Option-P (pause) when Xcode is frontmost, or build a "Debug"
>menu item into your app that calls Debugger() when you want it to.

I'm debugging some old code that I don't know that does StillDown()
loops and I want to catch where those loops are, so I'm looking for a
way to break into the debugger while my mouse is down so I can find the
StillDown loop.  I guess I could debug remotely, but I was hoping I
could somehow rig an F key to do it...

Thanks for your response!

--
____________________________________________________________
Sean McBride, B. Eng                 email@hidden
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada


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 >Breaking into debugger with key press while running GUI app (From: "Sean McBride" <email@hidden>)
 >Re: Breaking into debugger with key press while running GUI app (From: Chris Espinosa <email@hidden>)

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