gdb

bash-3.2# gdb /Applications/uTorrent.app
GNU gdb 6.3.50-20050815 (Apple version gdb-764) (Sat Sep 15 04:40:51 UTC 2007)
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This GDB was configured as "i386-apple-darwin"...
(gdb) run
Starting program: /Applications/uTorrent.app/Contents/MacOS/uTorrent 
2007-09-23 18:31:07.624 uTorrent[1315:813] {
    SUCheckAtStartup = 1;
    kAdvancedEnableCrashReporting = 1;
    kDownloadPathCompleted = "~/";
    kDownloadPathIncomplete = "~/Library/Application Support/uTorrent/incomplete/";
    kDownloadPromptForPath = 1;
    kGeneralConfirmQuit = 1;
    kGeneralUseGraphicalProgress = 1;
    kNetworkAutoMapPort = 1;
    kNetworkDownloadRateLimit = -1;
    kNetworkLimitDownloadRate = 0;
    kNetworkLimitUploadRate = 1;
    kNetworkPort = 16666;
    kNetworkUploadRateLimit = 35;
    kNetworkUseRandomPort = 1;
    kQueueMaxActiveDownloads = 0;
    kQueueMaxActiveUploads = 0;
    kSeedingStopRatio = "2.0";
    kSeedingStopWhenRatio = 0;
    kTorrentLabels =     (
    );
}
2007-09-23 18:31:07.772 uTorrent[1315:813] outlineViewSelectionDidChange:<Group: 0x5b2bf0>, Group
2007-09-23 18:31:08.036 uTorrent[1315:813] 0.9.3 (2977)
2007-09-23 18:31:08.293 uTorrent[1315:813] updateWithCount: 0
2007-09-23 18:31:08.298 uTorrent[1315:813] *** _networkReachabilityChangedCallback got flags: -r----- 
2007-09-23 18:31:08.300 uTorrent[1315:813] networkReachabilityDidChange: NSConcreteNotification 0x595c70 {name = BitTorrentNetworkReachabilityDidChangeNotification; object = 1}
2007-09-23 18:31:09.294 uTorrent[1315:813] 2007-09-23 18:31:09 -0400:Error while mapping ports on NAT router: NAT-PMP disabled: local host is probably not on a NATed network. disabling NAT-PMP
2007-09-23 18:31:09.294 uTorrent[1315:813] coreDidMapPorts:NO
2007-09-23 18:31:09.295 uTorrent[1315:813] 2007-09-23 18:31:09 -0400:Error while mapping ports on NAT router: UPnP portmapping disabled: local host is probably not on a NATed network. disabling UPnP
2007-09-23 18:31:09.296 uTorrent[1315:813] coreDidMapPorts:NO
2007-09-23 18:31:10.293 uTorrent[1315:813] *** -[NSCFArray _alertEventLoop:]: unrecognized selector sent to instance 0x565e10
2007-09-23 18:31:10.294 uTorrent[1315:813] *** NSTimer ignoring exception '*** -[NSCFArray _alertEventLoop:]: unrecognized selector sent to instance 0x565e10' that raised during firing of timer with target 0x565e10 and selector '_alertEventLoop:'

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0xc015ca2f
0x912966e8 in ?? ()
(gdb) bt
#0  0x912966e8 in ?? ()
#1  0xbfffede0 in ?? ()

Activity Monitor -> 'Sample'

Sampling process 1315 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling uTorrent (pid 1315) every 1 millisecond
Call graph:
    2364 Thread_2503
      2364 0x2d99
        2364 0x2e72
          2364 NSApplicationMain
            2364 -[NSApplication run]
              2364 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
                2364 _DPSNextEvent
                  2364 BlockUntilNextEventMatchingListInMode
                    2364 ReceiveNextEventCommon
                      2364 RunCurrentEventLoopInMode
                        2364 CFRunLoopRunInMode
                          2364 CFRunLoopRunSpecific
                            2364 objc_msgSend
                              2364 objc_msgSend
    2364 Thread_2603
      2364 thread_start
        2364 _pthread_start
          2364 __NSThread__main__
            2364 -[NSThread main]
              2364 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:]
                2364 CFRunLoopRunInMode
                  2364 CFRunLoopRunSpecific
                    2364 mach_msg
                      2364 mach_msg_trap
                        2364 mach_msg_trap
    2364 Thread_2703
      2364 thread_start
        2364 _pthread_start
          2364 select$DARWIN_EXTSN
            2364 select$DARWIN_EXTSN
    2364 Thread_2803
      2364 thread_start
        2364 _pthread_start
          2364 CFURLCacheWorkerThread(void*)
            2364 CFRunLoopRunInMode
              2364 CFRunLoopRunSpecific
                2364 mach_msg
                  2364 mach_msg_trap
                    2364 mach_msg_trap

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5):
        mach_msg_trap        4728
        objc_msgSend        2364
        select$DARWIN_EXTSN        2364
Sample analysis of process 1315 written to file /dev/stdout