提问



我们的iOS应用程序在启动时因为一小部分用户而崩溃。



  1. 我们无法在连接到Xcode或未连接的多个测试设备中重现此崩溃

  2. 崩溃只发生在iOS 5上,但发生在iPod,iPhone和iPad上

  3. 崩溃是启动时的看门狗超时

  4. 只有少数用户遇到崩溃

  5. 只有在用户升级时,应用才会崩溃

  6. 如果用户删除,然后重新安装应用程序,则会发生崩溃

  7. 关闭再打开设备无济于事

  8. 项目中使用的唯一XIB是主窗口的基本空XIB



如果有人知道这次崩溃可能来自哪里,我们肯定会感激。我们一直试图追踪它一个月失败。


非常感谢!


这是我们的应用程序:didFinishLaunchingWithOptions:


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self.window setBackgroundColor:[UIColor myBackgroundColor**];

    gRootViewController = [**RootViewController alloc] init];

    [self performSelectorOnMainThread:@selector(loadGame) withObject:nil waitUntilDone:NO];

    return YES;

}


这是符号化的崩溃日志:


Incident Identifier: 8AC99711-0817-4A93-AEFB-82E24FFE3291
Hardware Model:      iPhone3,1
Process:         myapp [92]
Path:            /var/mobile/Applications/B90DCE6D-F392-493E-8BC8-7FE0A64D80B0/myapp.app/myapp
Identifier:      myapp
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2012-04-04 21:52:17.108 -0500
OS Version:      iPhone OS 5.1 (9B176)
Report Version:  104

Exception Type:  00000020
Exception Codes: 0x8badf00d
Highlighted Thread:  0

Application Specific Information:
com.mycompany.myapp failed to launch in time

Elapsed total CPU time (seconds): 20.130 (user 20.130, system 0.000), 100% CPU 
Elapsed application CPU time (seconds): 14.747, 73% CPU

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0:
0   CoreFoundation                  0x34fe7930 CFBasicHashFindBucket + 2012
1   CoreFoundation                  0x34fe713e CFDictionaryGetValue + 110
2   CoreFoundation                  0x35054722 __CFBinaryPlistCreateObject2 + 38
3   CoreFoundation                  0x35055514 __CFBinaryPlistCreateObject2 + 3608
4   CoreFoundation                  0x35055514 __CFBinaryPlistCreateObject2 + 3608
5   CoreFoundation                  0x3505574e __CFTryParseBinaryPlist + 158
6   CoreFoundation                  0x34ffe9a0 _CFPropertyListCreateWithData + 80
7   CoreFoundation                  0x350175da CFPropertyListCreateWithStream + 430
8   CoreFoundation                  0x350173c0 CFPropertyListCreateFromStream + 56
9   CoreFoundation                  0x350170f0 -[CFXPreferencesPropertyListSourceSynchronizer createPlistFromDisk] + 128
10  CoreFoundation                  0x35007532 -[CFXPreferencesPropertyListSourceSynchronizer synchronizeAlreadyFlocked] + 242
11  CoreFoundation                  0x35007436 -[CFXPreferencesPropertyListSourceSynchronizer synchronize] + 14
12  CoreFoundation                  0x35016b34 -[CFXPreferencesPropertyListSource synchronize] + 104
13  CoreFoundation                  0x3509050e __CFXPreferencesGetSourceForTriplet + 454
14  CoreFoundation                  0x35090238 __CFXPreferencesGetSearchListForBundleID + 164
15  CoreFoundation                  0x3509192e ___CFXPreferencesCopyAppValue_block_invoke_0 + 6
16  CoreFoundation                  0x34fe8b24 CFPreferencesCopyAppValue + 276
17  Foundation                      0x30ed341c -[NSUserDefaults(NSUserDefaults) initWithUser:] + 1356
18  Foundation                      0x30eb28f8 +[NSUserDefaults(NSUserDefaults) standardUserDefaults] + 100
19  UIKit                           0x320f015e _InitMagnificationFilter + 26
20  libsystem_c.dylib               0x36d4b7ce pthread_once + 70
21  UIKit                           0x320dbbcc -[UIView _createLayerWithFrame:] + 424
22  UIKit                           0x320db874 UIViewCommonInitWithFrame + 348
23  UIKit                           0x320db6dc -[UIView initWithFrame:] + 92
24  UIKit                           0x320effaa -[UIStatusBar initWithFrame:showForegroundView:] + 46
25  UIKit                           0x320eff70 -[UIStatusBar initWithFrame:] + 32
26  UIKit                           0x320efdc6 -[UIApplication _createStatusBarWithRequestedStyle:orientation:hidden:] + 78
27  UIKit                           0x320ef876 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 138
28  UIKit                           0x320bdc64 -[UIApplication handleEvent:withNewEvent:] + 1004
29  UIKit                           0x320bd708 -[UIApplication sendEvent:] + 48
30  UIKit                           0x320bd0dc _UIApplicationHandleEvent + 5820
31  GraphicsServices                0x362f2224 PurpleEventCallback + 876
32  CoreFoundation                  0x3507351c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
33  CoreFoundation                  0x350734be __CFRunLoopDoSource1 + 134
34  CoreFoundation                  0x3507230c __CFRunLoopRun + 1364
35  CoreFoundation                  0x34ff549e CFRunLoopRunSpecific + 294
36  CoreFoundation                  0x34ff5366 CFRunLoopRunInMode + 98
37  UIKit                           0x320eea0c -[UIApplication _run] + 544
38  UIKit                           0x320ebe76 UIApplicationMain + 1074
39  myapp                               0x00005800 main (main.m:62)
40  myapp                               0x00002404 0x1000 + 5124

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib          0x34e833a8 kevent + 24
1   libdispatch.dylib               0x310d0ea4 _dispatch_mgr_invoke + 708
2   libdispatch.dylib               0x310d0bc2 _dispatch_mgr_thread + 30

Thread 2 name:  WebThread
Thread 2:
0   libsystem_kernel.dylib          0x34e83004 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x34e831fa mach_msg + 50
2   CoreFoundation                  0x350733ec __CFRunLoopServiceMachPort + 120
3   CoreFoundation                  0x35072124 __CFRunLoopRun + 876
4   CoreFoundation                  0x34ff549e CFRunLoopRunSpecific + 294
5   CoreFoundation                  0x34ff5366 CFRunLoopRunInMode + 98
6   WebCore                         0x36e780f0 _ZL12RunWebThreadPv + 396
7   libsystem_c.dylib               0x36d5072e _pthread_start + 314
8   libsystem_c.dylib               0x36d505e8 thread_start + 0

Unknown thread crashed with unknown flavor: 5, state_count: 1

Binary Images:
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0x2fe5a000 - 0x2fe7bfff  dyld armv7  <4a817f3e0def30d5ae2032157d889c1d> /usr/lib/dyld
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0x35281000 - 0x352c6fff  GeoServices armv7  <a26be2e76e8730ab91a16502aba376be> /System/Library/PrivateFrameworks/GeoServices.framework/GeoServices
0x35412000 - 0x35447fff  SystemConfiguration armv7  <4464a4e3bb3f32f7abaa35ebf31fda49> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
0x35448000 - 0x35591fff  libicucore.A.dylib armv7  <b70646b63f1f3b33896dd8cb91b8dab1> /usr/lib/libicucore.A.dylib
0x35599000 - 0x355e2fff  AddressBook armv7  <b17a2962e9043e0385c3c2c652155f2b> /System/Library/Frameworks/AddressBook.framework/AddressBook
0x358e8000 - 0x358eefff  liblockdown.dylib armv7  <9e45ce468a6f31e5b8263f2c224aa800> /usr/lib/liblockdown.dylib
0x358ef000 - 0x35aacfff  ImageIO armv7  <02e3578171fa3b6a969b244275fd2bab> /System/Library/Frameworks/ImageIO.framework/ImageIO
0x35ad7000 - 0x35ad9fff  MobileInstallation armv7  <215d93dbb0f63cbf828f9126eb7b5349> /System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation
0x35b3e000 - 0x35b61fff  MobileSync armv7  <e42604c550283f4aa517ae8f108b340f> /System/Library/PrivateFrameworks/MobileSync.framework/MobileSync
0x35baf000 - 0x35bfdfff  CoreLocation armv7  <44550ebedf23334d85441d9743b74e03> /System/Library/Frameworks/CoreLocation.framework/CoreLocation
0x35c07000 - 0x35cb5fff  Message armv7  <b8221d43401d315fb84398b7aa570fc1> /System/Library/PrivateFrameworks/Message.framework/Message
0x35dba000 - 0x35dbdfff  libsystem_network.dylib armv7  <356cb66612e836968ef24e6e5c3364cc> /usr/lib/system/libsystem_network.dylib
0x35f76000 - 0x3615afff  AudioToolbox armv7  <c91e27850452330ea804db6408840fd2> /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox
0x3615b000 - 0x3615bfff  libunwind.dylib armv7  <e0a73a57795f3e1698a52ebe6fc07005> /usr/lib/system/libunwind.dylib
0x36299000 - 0x3629ffff  libnotify.dylib armv7  <9406297de3e43742887890662a87ab53> /usr/lib/system/libnotify.dylib
0x362d4000 - 0x362e3fff  MobileDeviceLink armv7  <70ac33720f513f0f97ea2279260678ca> /System/Library/PrivateFrameworks/MobileDeviceLink.framework/MobileDeviceLink
0x362e4000 - 0x362ecfff  ProtocolBuffer armv7  <0e846afacf823d2b8c029cc3010a8253> /System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer
0x362ed000 - 0x362f7fff  GraphicsServices armv7  <e21a6e61bdd136b6805a9e3abe2e3d1f> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices
0x362f8000 - 0x362fffff  MailServices armv7  <ab2388ce733e38b7a261273a401bbbf1> /System/Library/PrivateFrameworks/MailServices.framework/MailServices
0x3630d000 - 0x36323fff  EAP8021X armv7  <fffe86a22bc434a6ae84f23bfecef9d6> /System/Library/PrivateFrameworks/EAP8021X.framework/EAP8021X
0x3632a000 - 0x363ecfff  Celestial armv7  <2a59586b0ae937c3b25fe526924aa885> /System/Library/PrivateFrameworks/Celestial.framework/Celestial
0x364b7000 - 0x364bbfff  libAccessibility.dylib armv7  <9a17d07b5a3b38cfafdf16f78c99b572> /usr/lib/libAccessibility.dylib
0x364bd000 - 0x36583fff  libobjc.A.dylib armv7  <90014d1bc583366d85622e43097df416> /usr/lib/libobjc.A.dylib
0x36584000 - 0x36584fff  libgcc_s.1.dylib armv7  <eb82984fa36c329387aa518aa5205f3d> /usr/lib/libgcc_s.1.dylib
0x3659f000 - 0x365a2fff  ActorKit armv7  <434c756a6b053f4ba3c954cfccddbf59> /System/Library/PrivateFrameworks/ActorKit.framework/ActorKit
0x36631000 - 0x36636fff  CrashReporterSupport armv7  <2bb524b3bb3c3eb2932ce13b655b7c7c> /System/Library/PrivateFrameworks/CrashReporterSupport.framework/CrashReporterSupport
0x36738000 - 0x36758fff  libxslt.1.dylib armv7  <39348471007e39dab80af68b08390456> /usr/lib/libxslt.1.dylib
0x368bc000 - 0x368d9fff  libsystem_info.dylib armv7  <50863bcbf478323e96a8e5b1a83ea6f9> /usr/lib/system/libsystem_info.dylib
0x368da000 - 0x368e9fff  SpringBoardServices armv7  <ca5b10014b473d2eaec5c48d89ee1b54> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices
0x3692a000 - 0x3692afff  libCVMSPluginSupport.dylib armv7  <a80aaa9989483ce3a496a061fd1e9e0a> /System/Library/Frameworks/OpenGLES.framework/libCVMSPluginSupport.dylib
0x36a58000 - 0x36a59fff  CoreSurface armv7  <7850befd26b630f183ee326aaadd7b34> /System/Library/PrivateFrameworks/CoreSurface.framework/CoreSurface
0x36b47000 - 0x36b4afff  libcompiler_rt.dylib armv7  <b2c05d8601c13be884097192dca4e187> /usr/lib/system/libcompiler_rt.dylib
0x36b84000 - 0x36c75fff  QuartzCore armv7  <a2afbe6483683d05ad51b106f98776e2> /System/Library/Frameworks/QuartzCore.framework/QuartzCore
0x36cfa000 - 0x36cfbfff  libsystem_sandbox.dylib armv7  <66e985f3eea03ef08afb7cf4c153f76e> /usr/lib/system/libsystem_sandbox.dylib
0x36d3d000 - 0x36d41fff  FTClientServices armv7  <21de970d7ebb3e7fb502a0a5451b0806> /System/Library/PrivateFrameworks/FTClientServices.framework/FTClientServices
0x36d42000 - 0x36dcefff  libsystem_c.dylib armv7  <f859ce1ad1773f0ba98d7c6e135b7697> /usr/lib/system/libsystem_c.dylib
0x36dcf000 - 0x3758dfff  WebCore armv7  <814351ff217e3425a8e532c2e2251f73> /System/Library/PrivateFrameworks/WebCore.framework/WebCore
0x3795b000 - 0x3795ffff  Marco armv7  <8dea3e558fe534ff868fc92e215ce53b> /System/Library/PrivateFrameworks/Marco.framework/Marco
0x3799c000 - 0x37a46fff  libBLAS.dylib armv7  <bf822cc1a3243ae7b104cf73ca22d352> /System/Library/Frameworks/Accelerate.framework/Frameworks/vecLib.framework/libBLAS.dylib
0x37a5d000 - 0x37aa0fff  libcommonCrypto.dylib armv7  <95b49daf4cf038b6bea8010bba3a1e26> /usr/lib/system/libcommonCrypto.dylib
0x37acb000 - 0x37b78fff  libxml2.2.dylib armv7  <58d47f064e0232119f4b838ad659f9c1> /usr/lib/libxml2.2.dylib
0x37bb8000 - 0x37bc0fff  MobileWiFi armv7  <b76c3e9fb78234c392058250d4620e72> /System/Library/PrivateFrameworks/MobileWiFi.framework/MobileWiFi
0x37bc3000 - 0x37bc8fff  libsystem_dnssd.dylib armv7  <27bb5462450732e380f5a2c170546e93> /usr/lib/system/libsystem_dnssd.dylib
0x37c6c000 - 0x37cb0fff  MobileCoreServices armv7  <757226927a873d5492be721908077b48> /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices
0x37d27000 - 0x37d8afff  IMCore armv7  <6e26e99b9b5f3829a8486ffd8c64f0d2> /System/Library/PrivateFrameworks/IMCore.framework/IMCore
0x37da5000 - 0x37e3efff  EventKit armv7  <d67aa1508ee7306b8e2a45c76ffddff0> /System/Library/Frameworks/EventKit.framework/EventKit
0x37eff000 - 0x37f01fff  libCoreVMClient.dylib armv7  <d4d4aa3090c83e87bcb15ed00b93fd5c> /System/Library/Frameworks/OpenGLES.framework/libCoreVMClient.dylib
0x37f1c000 - 0x37f1ffff  CoreTime armv7  <a398de5ba1e43a11b7008e9bb5a7f6fe> /System/Library/PrivateFrameworks/CoreTime.framework/CoreTime

最佳参考


因此,通常,在主线程上执行繁重的操作会导致应用程序的UI锁定。操作系统正在寻找applicationDidFinishLaunchingWithOptions在合理的时间后返回。如果它没有,它会杀死你的应用程序并给你8badf00d异常代码。看看你的经过时间;超过20秒!我已经获得8badf00d用于发射不到5秒。


很明显,你不会一直在所有设备上崩溃。如果你的设置依赖于互联网连接(就像我的那样),你可以在尝试连接Edge或阴暗的WiFi连接的设备上获得它。如果您正在做大量重型图形,那么这也可以通过加载时间阈值。有可能你在iOS5中看到这个的唯一原因是Apple减少了iOS5设备的加载时间最大限制(更好的硬件,更好的软件,加载时间应该更好,人们可以提出这个论点)。我强烈建议在后台线程中启动设置。如果该设置对您的应用程序是不可或缺的,请考虑首先使用加载指示器加载启动屏幕,并在设置完成后删除该视图。从用户的角度来看,他们只会像正常一样看到启动时的启动画面,然后可能会出现一个Activity指示器或某些东西,然后当它消失时,它们会有一个完全配置的设置。


其他选项是优化加载代码,以便在不到几秒钟内完成。但是,如果你现在20秒,我不会看到那么多优化是可能的。


更新: 来自apple docs:



  监视程序超时的最常见原因是在网络中崩溃
  应用程序是主线程上的同步网络。有
  这里有四个因素:
  同步网络 - 这是您发出网络请求并阻止等待响应的地方。
  主线程 - 同步网络通常不太理想,但是如果你在主要网络上进行,它会导致特定的问题
  线。请记住,主线程负责运行
  用户界面。如果你阻止主线程的任何重要
  时间量,用户界面变得无法接受地无响应。
  超时 - 如果网络刚刚消失(例如,用户在火车上>进入隧道),任何待处理的网络
  请求赢得失败,直到一些超时已到期。大多数网络
  超时以分钟为单位,意味着同步被阻止
  主线程上的网络请求可以保持用户界面
  一次几分钟没有反应。
  试图通过减少网络超时来避免这个问题并不是一个好主意。在某些情况下,它可能需要几秒钟
  网络请求成功,如果你总是早点出去
  你永远不会取得任何进展。
  看门狗 - 为了保持用户界面的响应,iOS包括一个看门狗机制。如果您的应用程序无法响应
  某些用户界面事件(启动,暂停,恢复,终止)
  时间,看门狗将杀死你的应用程序并生成一个看门狗
  超时崩溃报告。看门狗给你的时间不是
  正式记录,但它总是少于网络超时。
  这个问题的一个棘手的方面是它高度依赖于
  网络环境。如果你总是在你的应用程序中测试你
  办公室,网络连接良好,你永远不会看到这种类型
  崩溃。但是,一旦开始部署应用程序结束
  用户 - 将在各种网络环境中运行它 - 崩溃
  这样会变得很普遍。
  警告总而言之,如果您在上进行同步网络呼叫
  主线程,您的应用程序将遭受监视程序超时
  当它部署到广泛的用户时崩溃。


其它参考1


正如其他人所指出的那样,0x8badf00d意味着某些东西正在使应用程序花费太长时间才能启动。


看起来有这个问题的用户在他们的偏好中存储了太多东西(NSUserDefaults)。你不应该使用NSUserDefaults存储多个设置。你绝对不应该在那里存储大图像或blob二进制数据!


崩溃日志显示,读取和解析存储应用程序首选项的文件需要非常长的时间。通常这是因为文件太大。应用程序的首选项在第一个中读取时间任何检查,+[NSUserDefaults standardUserDefaults],一些iOS代码在启动时正在做什么。(可能是检查语言首选项,或调试标志 - 但确切的原因并不重要,你仍然会遇到同样的行为你第一次使用NSUserDefaults。)


为了保存足够大的数据0x8badf00d,核心数据可能是一个更好的API。[9]

其它参考2


我们刚刚通过调用Apple服务器来检查应用程序内购买时发现类似的启动崩溃。通过删除销售中的所有应用内购买,应用程序再次开始为报告问题的用户运行。希望有帮助!