Re: NSTask -launch Freezes
Re: NSTask -launch Freezes
- Subject: Re: NSTask -launch Freezes
- From: Joseph Kelly <email@hidden>
- Date: Thu, 19 Jan 2006 14:34:09 -0800
That's quite an amazing bug you've got there. I keep wondering why
something in fork() would be dispatching an ObjC message. IIRC, the
Darwin sources show that malloc_fork_prepare is simply locking a mutex.
Maybe somewhere fairly close to the run up of your launch call,
something is just silently trouncing memory? Maybe something in this
technote could help you: http://developer.apple.com/technotes/tn2004/
tn2124.html
joe
On Jan 19, 2006, at 1:37 PM, Seth Willits wrote:
On Jan 19, 2006, at 6:18 AM, Camillo Lugaresi wrote:
NSTask * task = [NSTask launchedTaskWithLaunchPath:@"/usr/bin/wc"
arguments:[NSArray arrayWithObjects:@"-l", @"/Users/seth/Desktop/
blah.txt", nil]];
Which works from the command line and from main() in a new
project, but in my own app, it freezes while launching:
#0 0xffff85d8 in objc_msgSend_rtp
#1 0x900318a4 in _malloc_fork_prepare
#2 0x900315ec in fork
#3 0x928d44b4 in -[NSConcreteTask launchWithDictionary:]
#4 0x928e8ca0 in +[NSTask launchedTaskWithLaunchPath:arguments:]
I have no idea what to do here. :(
Have you tried activating the various debugging flags, such as
NSZombieEnabled? That crash in obc_msgSend_rtp might be due to a
message being sent to a deallocated object.
This is the first I've heard of NSZombieEnabled, but I looked it up
and tried it, but nothing seems to run any differently. When the
task launches the app still freezes up, when I pause it with the
debugger, I still get the same backtrace above. No messages in the
console. :\
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