On Apr 6, 2010, at 12:08 PM, Kazior Fukacz wrote: > Thanks for your answers! > >>> By the way, are you using garbage collection? If not, then you're leaking >>> several objects (those pointed to by 'netstat', 'pipe', and 'string'). >> >> Yeah, I suspect that the pipes (and corresponding NSFileHandles) are indeed >> leaking, and that's the real problem. You may also want to create and >> launch NSTask instances inside an exception handler, since it and >> NSFileHandle/NSPipe can raise some unexpected exceptions. > > I'm coding under Tiger using XCode 2.5. As far as I know garbage collection > was introduced in XCode 3 which came with Objective-C 2.0, am I right?
It was introduced with Leopard, so you are definitely leaking objects in the code you posted. > Anyway, I tried putting a NSAutoreleasePool and draining it every time my > method finishes its work. Randomly adding NSAutoreleasePool instances is /not/ going to help; there's no magic here... > I also tried releasing the pipe manually. Still no luck. Read Ken's message again, and combine it with reading the Cocoa memory management docs: http://developer.apple.com/mac/library/documentation/cocoa/Conceptual/MemoryMgmt/index.html Until you fix all of the leaks, you'll have problems. I suggesting thinking about who "owns" the NSPipes that you create; once you understand the memory management rules in the docs, this will make sense. > However, putting "assert(pipe != null)" right before "[netstat > setStandardOutput: pipe];" ended up with "(...)/IPShowX/IPShowX.m:32: failed > assertion `pipe != nil'". It happened about 15 minutes after launching. This > might be helpful in determining what the reason of this problem might be. As > we can see it is NSPipe-related. Something about allocation, initialization > and releasing? > > How is it that it starts to malfunction after such amount of time? Because the leak builds up over time until you run out of file descriptors, and -[NSPipe init] finally starts returning nil. _______________________________________________ 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
