App Crash on iOS 5
I have been using Mobclix in my application and haven't experienced any issues until yesterday when I received a crash report from TestFlight which appears to have been caused by Mobclix. I was wondering if anyone could shed any light on the situation or how I might prevent it from happening again. This occurred on an iPhone 4s running iOS 5.0.1. Thanks for any input!
SIGSEGV - Unknown Signal
0 MyApp 0x00136046 testflight_backtrace + 142
1 MyApp 0x00136b60 TFSignalHandler + 212
2 libsystem_c.dylib 0x35fce538 _sigtramp + 48
3 CoreFoundation 0x37ab40ba -[__NSCFString isEqualToString:] + 174
4 QuartzCore 0x332b0b9c -[CALayer actionForKey:] + 76
5 QuartzCore 0x332b0b18 _ZL12actionForKeyP7CALayerPN2CA11TransactionEP8NSString + 56
6 QuartzCore 0x332b07c0 _ZN2CA5Layer12begin_changeEPNS_11TransactionEjRP11objc_object + 120
7 QuartzCore 0x332af8ee _ZN2CA5Layer6setterEj12_CAValueTypePKv + 162
8 QuartzCore 0x332ddffe -[CALayer setBackgroundColor:] + 34
9 UIKit 0x34f5dd5c -[UIView(Internal) _setBackgroundCGColor:withSystemColorName:] + 1200
10 UIKit 0x34f5d80a -[UIView(Hierarchy) _setBackgroundColor:] + 114
11 MyApp 0x00101e4a -[MobclixAdViewInternal initWithFrame:] (MobclixAdViewInternal.m:79)
12 MyApp 0x00105e1a -[MobclixAdView setupAdViewWithFrame:] (MobclixAdView.m:72)
13 MyApp 0x00105fa2 -[MobclixAdView initWithFrame:] (MobclixAdView.m:55)
14 MyApp 0x000cb550 -[LocationDetailViewController createAdBannerView] (LocationDetailViewController.m:394)
15 MyApp 0x000c9e0e -[LocationDetailViewController viewDidLoad] (LocationDetailViewController.m:109)
16 UIKit 0x34f4e7fe -[UIViewController view] + 166
17 UIKit 0x34f5ac38 -[UIViewController contentScrollView] + 24
18 UIKit 0x34f5aaa8 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 36
19 UIKit 0x34f5a98e -[UINavigationController _layoutViewController:] + 34
20 UIKit 0x34f5a210 -[UINavigationController _startTransition:fromViewController:toViewController:] + 500
21 UIKit 0x34f59f52 -[UINavigationController _startDeferredTransitionIfNeeded] + 250
22 UIKit 0x34f4e672 -[UINavigationController pushViewController:transition:forceImmediate:] + 806
23 UIKit 0x34f4e348 -[UINavigationController pushViewController:animated:] + 36
24 MyApp 0x000cd7f0 -[LocationsViewController tableView:didSelectRowAtIndexPath:] (LocationsViewController.m:362)
25 UIKit 0x34fc8564 -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] + 944
26 UIKit 0x35040ce6 -[UITableView _userSelectRowAtPendingSelectionIndexPath:] + 158
27 Foundation 0x31a8e942 __NSFireDelayedPerform + 414
28 CoreFoundation 0x37b31a62 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 14
29 CoreFoundation 0x37b316c8 __CFRunLoopDoTimer + 364
30 CoreFoundation 0x37b3029e __CFRunLoopRun + 1206
31 CoreFoundation 0x37ab34dc CFRunLoopRunSpecific + 300
32 CoreFoundation 0x37ab33a4 CFRunLoopRunInMode + 104
33 GraphicsServices 0x37631fcc GSEventRunModal + 156
34 UIKit 0x34f43742 UIApplicationMain + 1090
35 MyApp 0x000c6514 main (main.m:17)
36 MyApp 0x000c4b6f start + 39
I also managed to get the full crash log from the device:
Incident Identifier: 83282958-196D-444A-9687-3ABB995142B4
CrashReporter Key: 7468d6d075fbaeaa98a71643a55fdc3f52aed471
Hardware Model: iPhone4,1
Process: MyApp [11252]
Path: /var/mobile/Applications/0F320D6D-52F8-4088-B832-CC7454058932/MyApp.app/MyApp
Identifier: MyApp
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2012-02-04 21:38:51.450 -0500
OS Version: iPhone OS 5.0.1 (9A405)
Report Version: 104
Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 1
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 UIKit 0x34f178de 0x34f12000 + 22750
1 QuartzCore 0x332b0b96 0x332ad000 + 15254
2 QuartzCore 0x332b0b12 0x332ad000 + 15122
3 QuartzCore 0x332b07ba 0x332ad000 + 14266
4 QuartzCore 0x332af8e8 0x332ad000 + 10472
5 QuartzCore 0x332ddff8 0x332ad000 + 200696
6 UIKit 0x34f5dd56 0x34f12000 + 310614
7 UIKit 0x34f5d804 0x34f12000 + 309252
8 MyApp 0x00101e44 -[MobclixAdViewInternal initWithFrame:] (MobclixAdViewInternal.m:79)
9 MyApp 0x00105e14 -[MobclixAdView setupAdViewWithFrame:] (MobclixAdView.m:72)
10 MyApp 0x00105f9c -[MobclixAdView initWithFrame:] (MobclixAdView.m:55)
11 MyApp 0x000cb54a -[LocationDetailViewController createAdBannerView] (LocationDetailViewController.m:394)
12 MyApp 0x000c9e08 -[LocationDetailViewController viewDidLoad] (LocationDetailViewController.m:109)
13 UIKit 0x34f4e7f8 0x34f12000 + 247800
14 UIKit 0x34f5ac32 0x34f12000 + 298034
15 UIKit 0x34f5aaa2 0x34f12000 + 297634
16 UIKit 0x34f5a988 0x34f12000 + 297352
17 UIKit 0x34f5a20a 0x34f12000 + 295434
18 UIKit 0x34f59f4c 0x34f12000 + 294732
19 UIKit 0x34f4e66c 0x34f12000 + 247404
20 UIKit 0x34f4e342 0x34f12000 + 246594
21 MyApp 0x000cd7ea -[LocationsViewController tableView:didSelectRowAtIndexPath:] (LocationsViewController.m:362)
22 UIKit 0x34fc855e 0x34f12000 + 746846
23 UIKit 0x35040ce0 0x34f12000 + 1240288
24 Foundation 0x31a8e93c 0x319f3000 + 637244
25 CoreFoundation 0x37b31a5c 0x37aa4000 + 580188
26 CoreFoundation 0x37b316c2 0x37aa4000 + 579266
27 CoreFoundation 0x37b30298 0x37aa4000 + 574104
28 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
29 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
30 GraphicsServices 0x37631fc6 0x3762e000 + 16326
31 UIKit 0x34f4373c 0x34f12000 + 202556
32 MyApp 0x000c650e main (main.m:17)
33 MyApp 0x000c4b68 0xc2000 + 11112
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1 Crashed:
0 libsystem_kernel.dylib 0x333e73b4 0x333e6000 + 5044
1 libdispatch.dylib 0x3781bf74 0x37818000 + 16244
2 libdispatch.dylib 0x3781bc92 0x37818000 + 15506
Thread 2 name: WebThread
Thread 2:
0 libsystem_kernel.dylib 0x333e7010 0x333e6000 + 4112
1 libsystem_kernel.dylib 0x333e7206 0x333e6000 + 4614
2 CoreFoundation 0x37b3141c 0x37aa4000 + 578588
3 CoreFoundation 0x37b30154 0x37aa4000 + 573780
4 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
5 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
6 WebCore 0x32384128 0x322dc000 + 688424
7 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
8 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 3 name: com.apple.NSURLConnectionLoader
Thread 3:
0 libsystem_kernel.dylib 0x333e7010 0x333e6000 + 4112
1 libsystem_kernel.dylib 0x333e7206 0x333e6000 + 4614
2 CoreFoundation 0x37b3141c 0x37aa4000 + 578588
3 CoreFoundation 0x37b30154 0x37aa4000 + 573780
4 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
5 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
6 Foundation 0x31a03bc2 0x319f3000 + 68546
7 Foundation 0x31a03a8a 0x319f3000 + 68234
8 Foundation 0x31a9759a 0x319f3000 + 673178
9 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
10 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 4:
0 libsystem_kernel.dylib 0x333e7010 0x333e6000 + 4112
1 libsystem_kernel.dylib 0x333e7206 0x333e6000 + 4614
2 CoreFoundation 0x37b3141c 0x37aa4000 + 578588
3 CoreFoundation 0x37b30154 0x37aa4000 + 573780
4 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
5 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
6 Foundation 0x319f7b7e 0x319f3000 + 19326
7 Foundation 0x31a1152c 0x319f3000 + 124204
8 MyApp 0x0014a986 0xc2000 + 559494
9 Foundation 0x31a03a8a 0x319f3000 + 68234
10 Foundation 0x31a9759a 0x319f3000 + 673178
11 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
12 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 5 name: com.apple.CFSocket.private
Thread 5:
0 libsystem_kernel.dylib 0x333f7570 0x333e6000 + 71024
1 CoreFoundation 0x37b3566a 0x37aa4000 + 595562
2 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
3 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 6:
0 libsystem_kernel.dylib 0x333e7010 0x333e6000 + 4112
1 libsystem_kernel.dylib 0x333e7206 0x333e6000 + 4614
2 CoreFoundation 0x37b3141c 0x37aa4000 + 578588
3 CoreFoundation 0x37b30154 0x37aa4000 + 573780
4 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
5 CoreFoundation 0x37b30474 0x37aa4000 + 574580
6 MyApp 0x002791cc +[UA_ASIHTTPRequest runRequests] (UA_ASIHTTPRequest.m:4789)
7 Foundation 0x31a03a8a 0x319f3000 + 68234
8 Foundation 0x31a9759a 0x319f3000 + 673178
9 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
10 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 7 name: NetworkIO
Thread 7:
0 libsystem_kernel.dylib 0x333e7010 0x333e6000 + 4112
1 libsystem_kernel.dylib 0x333e7206 0x333e6000 + 4614
2 CoreFoundation 0x37b3141c 0x37aa4000 + 578588
3 CoreFoundation 0x37b30154 0x37aa4000 + 573780
4 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
5 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
6 MapKit 0x37d1a412 0x37d0c000 + 58386
7 Foundation 0x31a03a8a 0x319f3000 + 68234
8 Foundation 0x31a9759a 0x319f3000 + 673178
9 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
10 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 8:
0 libsystem_kernel.dylib 0x333f7cd4 0x333e6000 + 72916
1 libsystem_c.dylib 0x35f8030a 0x35f76000 + 41738
2 libsystem_c.dylib 0x35f8009c 0x35f76000 + 41116
Thread 9 name: WebCore: CFNetwork Loader
Thread 9:
0 libsystem_kernel.dylib 0x333e7010 0x333e6000 + 4112
1 libsystem_kernel.dylib 0x333e7206 0x333e6000 + 4614
2 CoreFoundation 0x37b3141c 0x37aa4000 + 578588
3 CoreFoundation 0x37b30154 0x37aa4000 + 573780
4 CoreFoundation 0x37ab34d6 0x37aa4000 + 62678
5 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
6 WebCore 0x323ad69e 0x322dc000 + 857758
7 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
8 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 10:
0 libsystem_kernel.dylib 0x333f7cd4 0x333e6000 + 72916
1 libsystem_c.dylib 0x35f8030a 0x35f76000 + 41738
2 libsystem_c.dylib 0x35f8009c 0x35f76000 + 41116
Thread 11:
0 libsystem_kernel.dylib 0x333f7cd4 0x333e6000 + 72916
1 libsystem_c.dylib 0x35f8030a 0x35f76000 + 41738
2 libsystem_c.dylib 0x35f8009c 0x35f76000 + 41116
Thread 12:
0 libsystem_c.dylib 0x35f79254 0x35f76000 + 12884
1 QuartzCore 0x332af188 0x332ad000 + 8584
2 QuartzCore 0x332b2ed8 0x332ad000 + 24280
3 QuartzCore 0x332b7114 0x332ad000 + 41236
4 QuartzCore 0x332b6e50 0x332ad000 + 40528
5 QuartzCore 0x332aed7e 0x332ad000 + 7550
6 CoreFoundation 0x37b31b44 0x37aa4000 + 580420
7 CoreFoundation 0x37b2fd80 0x37aa4000 + 572800
8 CoreFoundation 0x37ab34f2 0x37aa4000 + 62706
9 CoreFoundation 0x37ab339e 0x37aa4000 + 62366
10 Foundation 0x319f7b7e 0x319f3000 + 19326
11 MyApp 0x0025d5cc -[DynamoDBWebServiceClient invoke:rawRequest:unmarshallerDelegate:] (DynamoDBWebServiceClient.m:105)
12 MyApp 0x0025cb28 -[AmazonDynamoDBClient query:] (AmazonDynamoDBClient.m:55)
13 MyApp 0x000fb2f6 -[MessageManager loadRecentMessagesForLocation:] (MessageManager.m:99)
14 MyApp 0x000ca2cc -[LocationDetailViewController loadServerData] (LocationDetailViewController.m:181)
15 Foundation 0x31a03a8a 0x319f3000 + 68234
16 Foundation 0x31a9759a 0x319f3000 + 673178
17 libsystem_c.dylib 0x35f85c16 0x35f76000 + 64534
18 libsystem_c.dylib 0x35f85ad0 0x35f76000 + 64208
Thread 1 crashed with ARM Thread State:
r0: 0x00000004 r1: 0x00000000 r2: 0x00000000 r3: 0x2ff9c634
r4: 0x00000001 r5: 0x2ff9c750 r6: 0x2ff9c750 r7: 0x2ff9c770
r8: 0x00000000 r9: 0x00000000 r10: 0x3f44e850 r11: 0x00000000
ip: 0x0000016b sp: 0x2ff9c620 lr: 0x3781bf7b pc: 0x333e73b4
cpsr: 0x60000010
Here are all of Mobclix related methods and calls from LocationDetailViewController:
- (void)adViewDidFinishLoad:(MobclixAdView*)adView {
if (!adBannerViewIsVisible) {
// Show the ad banner
adBannerViewIsVisible = YES;
[self fixupAdView];
}
}
- (void)adView:(MobclixAdView*)adView didFailLoadWithError:(NSError*)error {
if (adBannerViewIsVisible) {
// Hide the ad banner
adBannerViewIsVisible = NO;
[self fixupAdView];
}
}
- (void)createAdBannerView {
// Create the ad banner
self.adBannerView = [[MobclixAdViewiPhone_320x50 alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 50.0f)];
self.adBannerView.delegate = self;
[self.view addSubview:adBannerView];
}
- (void)fixupAdView {
if (adBannerView != nil) {
[UIView beginAnimations:@"fixupViews" context:nil];
// Move items to fit ad banner
if (adBannerViewIsVisible) {
CGRect adBannerViewFrame = [adBannerView frame];
adBannerViewFrame.origin.x = 0;
adBannerViewFrame.origin.y = 0;
[adBannerView setFrame:adBannerViewFrame];
CGRect contentViewFrame = contentView.frame;
contentViewFrame.origin.y = 50;
contentViewFrame.size.height = self.view.frame.size.height - 50;
contentView.frame = contentViewFrame;
CGRect tableViewFrame = tableView.frame;
tableViewFrame.origin.y = tableView.frame.origin.y;
tableViewFrame.size.height = 317;
tableView.frame = tableViewFrame;
// Move items to hide ad banner
} else {
CGRect adBannerViewFrame = [adBannerView frame];
adBannerViewFrame.origin.x = 0;
adBannerViewFrame.origin.y = -50;
[adBannerView setFrame:adBannerViewFrame];
CGRect contentViewFrame = contentView.frame;
contentViewFrame.origin.y = 0;
contentViewFrame.size.height = self.view.frame.size.height;
contentView.frame = contentViewFrame;
CGRect tableViewFrame = tableView.frame;
tableViewFrame.origin.y = tableView.frame.origin.y;
tableViewFrame.size.height = 367;
tableView.frame = tableViewFrame;
}
[UIView commitAnimations];
}
}
- (void)viewDidLoad {
[super viewDidLoad];
// Attempt to load an ad and resize the view to fit it
[self createAdBannerView];
[self fixupAdView];
}
- (void)viewDidUnload {
[super viewDidUnload];
[self.adBannerView cancelAd];
self.adBannerView.delegate = nil;
self.adBannerView = nil;
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// Resume ad loading from Mobclix
[self.adBannerView resumeAdAutoRefresh];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
// Pause ad loading from Mobclix
[self.adBannerView pauseAdAutoRefresh];
}
Stephen Woodford2 Answers
The crashing thread 1 has only Apple framework calls, nothing from your app. Those will symbolicate if the symbolication script has the iOS 5.0.1 symbols accessible via Spotlight. It looks unlikely so far that this problem is related to the Mobclix code.
Since the exception type is SIGSEGV you won't find a line number in the crashing thread which causes the crash. You have somewhere (could be anywhere!) in your code a memory problem, which causes the app trying to access a memory address which is actually invalid. Hence, causing the crash.
Since libdispatch is part of the crashing thread, this could be a hint that somewhere in your code where you are using GCD might be the area of your problem. As said, most likely a memory issue.
In general the best way I found to reliable find and resolve memory issues was using a testing framework and automate the app interaction so it runs a long time. It also helps to automate it by redoing the same user interaction over and over again. It will most likely crash, but this time reproducible so you can run the automation with instruments aside. I did use the KIF framework with great success for that.
For getting the full crash reports, you might want to take a look into alternative crash report solutions, which I hinted at here: https://stackoverflow.com/a/8242215/474794
Kerni
CommunityYou only get the stacktrace from the main thread in the TestFlight crash report. However possibly the real crash occured in another thread and the main thread handled it. If you can reproduce that crash with the same backtrace then there is really a bug in Mobclix.
You'll need the full crash report, which you can only get, when you have access to the device.
You can find more helpful information in this answer: https://stackoverflow.com/a/6462751/550177
EDIT: As I said, the real crash is in a different thread (Thread 1). But I can't figure out what caused the crash. Look at the other backtraces where MyApp is involved (Thread 4, 6 & 12).
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