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iPhone development- where can I get a list of all signals received by apps and what they mean

Answer 1

+3 A:

Martin Pilkington 2009-01-27 12:49:08

Thanks Martin. Is there a way of knowing why the error occurs? according to the signal man page, signal 10 is Bus error (which is clear from the error) but what does it mean and how do I remove it?

lostInTransit 2009-01-27 13:09:18

Generally SIGBUS is a memory error. I'd check your memory management and see if you aren't over releasing something. Just found a better link that explains possible causes on CocoaDev: http://www.cocoadev.com/index.pl?SignalsSentOnCrash

Martin Pilkington 2009-01-28 17:37:02

Answer 2

+1 A:

A bus error means that you're trying to access memory that the CPU can't physically access. As opposed to a segmentation fault, which means you're accessing memory that doesn't belong to you. Either way, you probably have a stray pointer.

Try using the memory allocation debugger in XCode (Guard Malloc). It will only run in the simulator and slows things down a lot, but I find it very useful.

Stephen Darlington 2009-01-27 13:24:57

Thanks Stephen. I could not find the error even after using Guard Malloc. The problem is that I am not getting any error when running the app on the simulator. It is causing trouble only with the device. Any suggestions? Thanks.

lostInTransit 2009-01-27 15:19:08

Unfortunately I don't think there's a simple, one-click way of finding out where the problem is. Indeed, you're probably deallocating memory in one place and getting the crash elsewhere. It's probably down to breakpoints and single-stepping.

Stephen Darlington 2009-02-03 09:40:59

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iPhone development- where can I get a list of all signals received by apps and what they mean

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