5
一般來說，我們如何避免在我們的Mac應用程序中發生objc_msgSend（）崩潰？另外，我們如何避免EXC_BAD_ACCESS崩潰？我們爲什麼得到它？我們如何管理這些類型的錯誤？他們正在增加我們的應用程序，並希望就此問題提供指導和幫助。可可應用程序中的objc_msgSend（）和EXC_BAD_ACCESS
我們正在使用XCode 3.2.5，我們的項目是一個可可，使用Objective-C語言。我們的web服務是一個IIS供電的ASP.Net網站（我們可以從這裏下載/上傳XML文件和圖像）。
我們正在Mac上開發一個可可應用程序，我們在啓動應用程序的十次嘗試中遇到過這樣的兩次。這個應用程序有一個草圖應用程序，當我們運行應用程序，它只是在1分鐘內凍結和崩潰，而不做任何事情。這個應用程序做一些功能是：從網絡
- 下載xml和解釋我們的應用程序
- 登錄到Web服務
- 有一個速寫本
- 具有定時
- 拖放功能
- 上傳XML數據
- 下載圖像，並顯示在我們的應用程序
崩潰不限於應用程序發佈後。有時候，在拖放，下載數據集，以及在我們的Mac應用程序上添加/編輯/刪除功能等操作程序時，應用程序也會崩潰。
老實說，我們對這個開發平臺和環境比較陌生，而且我們還在學習。你能指導我們解決這個問題嗎？像一些資源或提示我們做錯了什麼？感謝這裏每個人都有更多更多的權力。
如下因素是崩潰報告的一個例子：
Process: Sketch [63065]
Path: /Users/william_hooley_27Inch/Desktop/untitled folder/MacGlass.app/Contents/MacOS/Sketch
Identifier: com.apple.CocoaExamples.Sketch
Version: 1.049 (48.1)
Code Type: X86 (Native)
Parent Process: launchd [116]
Date/Time: 2011-04-14 13:12:15.421 +1000
OS Version: Mac OS X 10.6.5 (10H574)
Report Version: 6
Interval Since Last Report: 714907 sec
Crashes Since Last Report: 17
Per-App Interval Since Last Report: 206437 sec
Per-App Crashes Since Last Report: 5
Anonymous UUID:
086C860F-E28E-4256-84F9-9692782AAD01
Exception Type: EXC_BAD_ACCESS
(SIGBUS) Exception Codes:
KERN_PROTECTION_FAILURE at
0x0000000000000044 Crashed Thread: 0
Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue:
com.apple.main-thread 0
com.apple.AppKit
0x91a8e6cb
_recursiveInvalidateCachedVisibleRectValue
+ 24 1 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
2 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 3 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
4 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 5 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
6 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 7 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
8 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 9 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
10 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 11 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
12 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 13 com.apple.CoreFoundation 0x995f02c0 CFArrayApplyFunction + 224
14 com.apple.AppKit
0x91a8e70d
_recursiveInvalidateCachedVisibleRectValue
+ 90 15 com.apple.AppKit 0x91a8e2e1 -[NSView _setSuperview:] +
684 16 com.apple.AppKit
0x91a8db02 -[NSView addSubview:] + 383
17 com.apple.CocoaExamples.Sketch
0x00094cbf -[viewTasksDisplay Appear:]
+ 242 18 com.apple.CocoaExamples.Sketch
0x000c2e8f -[MainWindow
ShowLeftScreen:] + 964 19
com.apple.CocoaExamples.Sketch
0x0003e301 -[viewOptionMenuItemmouseDown:] + 2055 20
com.apple.AppKit
0x91bc6c68 -[NSWindow sendEvent:] +
5549 21 com.apple.AppKit
0x91adf817 -[NSApplication sendEvent:]
+ 6431 22 com.apple.AppKit 0x91a732a7 -[NSApplication run] + 917
23 com.apple.AppKit
0x91a6b2d9 NSApplicationMain + 574 24
com.apple.CocoaExamples.Sketch
0x0001b33e main + 30 25
com.apple.CocoaExamples.Sketch
0x00001eba start + 54 Thread 1:
Dispatch queue:
com.apple.libdispatch-manager 0
libSystem.B.dylib
0x98002982 kevent + 10 1
libSystem.B.dylib
0x9800309c _dispatch_mgr_invoke + 215
2 libSystem.B.dylib
0x98002559 _dispatch_queue_invoke +
163 3 libSystem.B.dylib
0x980022fe _dispatch_worker_thread2 +
240 4 libSystem.B.dylib
0x98001d81 _pthread_wqthread + 390 5
libSystem.B.dylib
0x98001bc6 start_wqthread + 30 Thread
2: 0 libSystem.B.dylib
0x97fdc0fa mach_msg_trap + 10 1
libSystem.B.dylib
0x97fdc867 mach_msg + 68 2
com.apple.CoreFoundation
0x995f837f __CFRunLoopRun + 2079
另一個崩潰報告：
Date/Time: 2011-04-14 13:27:02
+1000 OS Version: 10.6.5 (Build 10H574) Architecture: x86_64 Report
Version: 6 Command: MacGlass
Path:
/Users/william_hooley_27Inch/Desktop/untitled
folder/MacGlass.app/Contents/MacOS/Sketch
Version: 1.050 (48.1) Parent:
launchd [116] PID: 63101
Event: hang Duration:
3.58s (sampling started after 2 seconds) Steps: 16 (100ms
sampling interval) Pageins: 0
Pageouts: 0 Process:
Sketch [63101] Path:
/Users/william_hooley_27Inch/Desktop/untitled
folder/MacGlass.app/Contents/MacOS/Sketch
UID: 501 Thread edef3d4
DispatchQueue 100 User stack:
16 start + 54 (in Sketch) [0x1f6a]
16 main + 30 (in Sketch) [0x1b3ee]
16 NSApplicationMain + 574 (in AppKit) [0x91a6b2d9]
16 -[NSApplication run] + 821 (in AppKit) [0x91a73247]
16 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
+ 156 (in AppKit) [0x91ab0fce]
16 _DPSNextEvent + 847 (in AppKit) [0x91ab178d]
16 BlockUntilNextEventMatchingListInMode
+ 81 (in HIToolbox) [0x95bd0bd6]
16 ReceiveNextEventCommon + 354 (in
HIToolbox) [0x95bd0d51]
16 RunCurrentEventLoopInMode + 392 (in
HIToolbox) [0x95bd0f9c]
16 CFRunLoopRunInMode + 97 (in
CoreFoundation) [0x995f7291]
16 CFRunLoopRunSpecific + 452 (in
CoreFoundation) [0x995f7464]
16 __CFRunLoopRun + 8059 (in CoreFoundation) [0x995f9adb]
16 __NSFireTimer + 141 (in Foundation) [0x972c39b0]
16 _handleWindowNeedsDisplay + 696 (in AppKit) [0x91adb28a]
16 -[NSWindow displayIfNeeded] + 204 (in AppKit) [0x91aa9d40]
16 -[NSView displayIfNeeded] + 818 (in AppKit) [0x91ae0a57]
16 -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:]
+ 4122 (in AppKit) [0x91b801cf]
16 CAViewEndDraw + 134 (in QuartzCore)
[0x961bd926]
16 pthread_cond_wait$UNIX2003 + 73 (in
libSystem.B.dylib) [0x9800b9f8]
16 __semwait_signal + 10 (in
libSystem.B.dylib) [0x9800a0a6]
Kernel stack:
15 semaphore_wait_continue + 0 [0x22a3dd]
1 lo_alltraps + 454 [0x2a08a6]
1 i386_astintr + 47 [0x2a9a9a]
1 ast_taken + 247 [0x219107]
1 bsd_ast + 806 [0x489088]
1 postsig + 432 [0x4861df]
1 exit1 + 449 [0x47ab28]
1 task_terminate_internal + 315
[0x22c56a]
而對於'EXC_BAD_ACCESS'一個常見的原因是錯誤的內存manageme NT。你在你的應用程序中使用垃圾回收嗎？ – 2011-04-14 08:03:18
我推薦閱讀： [所以你墜毀在objc_msgSend（）]（http://www.sealiesoftware.com/blog/archive/2008/09/22/objc_explain_So_you_crashed_in_objc_msgSend.html） – 2011-04-14 10:22:44