Re: MacSoftware update causes my application to hang
Re: MacSoftware update causes my application to hang
- Subject: Re: MacSoftware update causes my application to hang
- From: Fritz Anderson <email@hidden>
- Date: Fri, 8 Dec 2006 14:10:58 -0600
On Dec 8, 2006, at 1:42 PM, Balaram Barange wrote:
I have a problem with my application, mac software update causes
my application to hang. it basically suspends my app. and when the
update ends my app goes into a non responsive state.
Can some one tell me reason for this.
I wanted to put a check in my app that if the software update is
running then stop my app for sometime then again check whether
software update is running..
I believe this is not a constructive approach. Every Macintosh
application that I am aware of will run concurrently with Software
Update. This suggests a bug in your application, which you should
fix, and not a problem with SU that you must work around.
You can learn much about the state of a hung application from common
development tools.
- The debugger in Xcode 2.4 allows you to attach to a running process.
- Better still, run a debug version of the application, trigger the
bug, and if necessary pause the application.
- Use the Sampler application (/Developer/Applications/Performance
Tools/Sampler) during the hang to produce a statistical stack dump.
- Use the sampling facility in /Applications/Utilities/Activity
Monitor (click your application, then the Inspect button, and the
Sample button in the inspector window) to do the same thing.
- Use the "sample" command-line tool to do the same thing. You must
supply process name/number, how many seconds to run, and the
interval, in milliseconds, between taking samples. I find "sample
MyApp 10 10" to be good almost always.
With these, an examination of the resulting stack dump may tell you
where your application has gone off the rails.
- Use Shark to get even more detailed information about the
application before, during, and after the hang. You can use the call-
stack history for clues about what you application was doing around
that time.
- Use the /Applications/Utilities/Console application to examine the
system and console logs to see if any messages about your application
were written.
Sean McBride also recommends Thread Viewer.
— F
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