Cannot access memory at address 0x4

Cannot access memory at address 0x4

http://www.cocoabuilder.com/archive/message/xcode/2008/8/11/24038

Hey,
On one of my projects any time I try to start the program with a debug point
set, GDB crashes before anything happens. It prints out:

run
[Switching to process 2279 local thread 0x2d03]
Running�
2008-09-04 16:32:28.470 MyApp[2279:813] 1.00000
[Switching to process 2279 thread 0x5603]
[Switching to process 2279 thread 0x5603]
Program received signal:  "EXC_BAD_ACCESS".
Cannot access memory at address 0x4
Cannot access memory at address 0x4
I then did a backtrace and get:

*(gdb) **backtrace*

#0  0xdeadbeef in ?? ()

Cannot access memory at address 0x4


What is extremely frustrating is that this has started to happen in all of
my applications, even a brand new vanilla project. This project is the only
one that it happens all of the time for though, usually building and
rebuilding will a successful launch.


After some Googling, it seems others have run into this problem but no one
posted a fix. One person suggested it had to do with his installation of
both Xcode2.5 and Xcode3.1, which I had both installed. I uninstalled both
and then reinstalled Xcode3.1, but the problem persists.


It looks like someone had a similar problem with a Java app that got
resolved (
http://www.mailinglistarchive.com/<email_removed>/msg06697.html),
but mine isn't Java.


Please help me! I can't continue to work until this is resolved and I have
already spent a few days trying to figure it out.

Thank You,
Bridger Maxwell

I just fixed the problem. I removed the 'Library -> PreferencePane' folder and everything works fine.

Thanks for your help.

Re: GDB Problems
FROM : Jason Coco
DATE : Fri Sep 12 06:15:34 2008

On Sep 12, 2008, at 00:10 , Bridger Maxwell wrote:

> Woops. I tried to reply to this thread a while ago, but I wasn't  
> watching
> what I was doing and accidentally replied specifically to Ken. Sorry  
> Ken! I
> am still having this issue though.
>
>

>> I suspect you've recently installed a haxie, input manager, third- 
>> party

>>> kernel extension or other piece of software which modifies the  
>>> behavior of
>>> nearly all applications on your system.  It seems to be  
>>> interfering with
>>> gdb.  If you can figure out what it is, disable or uninstall it  
>>> and reboot.

>>
>>

> I don't think I have any unusual kernel extensions installed. This  
> is a work
> computer and my installation is typical of almost everyone else at  
> work.


What is the output of "kextstat -k" ?

以上解决方法并不是通用的，出现这个错误很有可能是程序代码本身有问题
但是也有其它情况：
我碰到过，因为同时打开两个相同名字的xcode的工程，就出这个错误的情况，关其中一个就没事了