yok*_*k88 6 macos cocoa exc-bad-access objective-c
一般来说,我们如何在Mac应用程序中避免objc_msgSend()崩溃？另外,我们如何避免EXC_BAD_ACCESS崩溃？为什么我们得到它？我们如何处理这类错误？它们正在增加我们的应用程序,并希望就此问题寻求指导和帮助.
我们正在使用XCode 3.2.5,我们的项目是Cocoa,使用Objective-C语言.我们的Web服务是一个基于IIS的ASP.Net网站(我们可以从中下载/上传XML文件和图像).
我们正在Mac上开发一个可可应用程序,我们在启动应用程序的十次尝试中遇到过两次.这个应用程序有一个草图应用程序,当我们运行应用程序时,它只是在1分钟内冻结和崩溃而不做任何事情.这个应用程序的一些功能是:
崩溃不仅限于应用程序的发布后.有时候,在我们的mac应用程序中操作拖放,下载数据集以及添加/编辑/删除功能等程序时,应用程序也会崩溃.
老实说,我们对这个开发平台和环境比较陌生,我们还在学习.你能指导我们这个问题吗？像一些资源或提示我们做错了什么？非常感谢大家和更多的力量.
以下是崩溃报告的示例:
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
另一份崩溃报告:
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]
造成这种情况的通常原因是过度释放对象。如果您使用NSZombieEnabled运行代码，控制台输出应该为您提供查看位置的线索。
或者，如果这是针对 10.5 或更高版本的 Macintosh 应用程序，您可以启用垃圾收集，而根本不用担心保留和释放。
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