I have a document based app which collects data and updates its document.
Works fine in Snow Leopard, hangs in Lion.
At start it blocks (see sample at end of post).
This initial hang can be avoided, if for the first 3 seconds after launch no
saves are allowed. (Rather a crude hack).
But even then, it usually will hang some time later (maybe a long time later -
hard to reproduce).
I guess that Lion tries to restore some windows which interferes with my own
calls to saveDocument:.
MyDocument is a subclass of NSDocument.
Overridden NSDocument methods are:
- (id)init
- (id)initWithType:(NSString *)typeName error:(NSError **)outError
- (void)dealloc
- (BOOL)readFromURL:(NSURL *)absoluteURL ofType:(NSString *)typeName
error:(NSError **)outError
- (BOOL)writeToURL:(NSURL *)absoluteURL ofType:(NSString *)typeName
forSaveOperation:(NSSaveOperationType)saveOperation originalContentsURL:(NSURL
*)absoluteOriginalContentsURL error:(NSError **)outError
- (BOOL)writeToURL:(NSURL *)absoluteURL ofType:(NSString *)typeName
error:(NSError **)outError
- (void)close
all of these contain log statements.
some more:
- (BOOL)prepareSavePanel:(NSSavePanel *)savePanel
- (NSString *)windowNibName
- (void)windowControllerDidLoadNib:(NSWindowController *) aController
The ap starts like this:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// ....
NSDocumentController *sDC = [ NSDocumentController
sharedDocumentController ];
NSError *outError ;
activeDoc = [ sDC openDocumentWithContentsOfURL: absoluteURL display:
YES error: &outError ];
if ( activeDoc == nil ) // error handling (no error did happen)
}
creates these logs:
2011-08-29 13:00:38.396 EnTeP[4982:707] -[MyDocument init] self <MyDocument:
0x1005278f0>
2011-08-29 13:00:38.399 EnTeP[4982:707] -[MyDocument readFromURL:ofType:error:]
self <MyDocument: 0x1005278f0>
2011-08-29 13:00:38.402 EnTeP[4982:707] -[MyDocument readFromURL:ofType:error:]
done
Then something happens and this code gets executed:
- (BOOL)takkeEvent: (EvenT *)eve ;
{
// do something then:
NSLog(@"%s will save",__FUNCTION__);
[ self saveDocument: nil ];
NSLog(@"%s did save",__FUNCTION__); ← Note: never gets to here
}
which writes this log line, and then hangs forever:
2011-08-29 13:00:41.417 EnTeP[4982:707] -[MyDocument takkeEvent:] will save
How do I debug this (I'm rather new to Lion)?
And here is the sample, taken by Activity Monitor:
OS Version: Mac OS X 10.7.1 (11B26)
Report Version: 7
Call graph:
2678 Thread_175770 DispatchQueue_1: com.apple.main-thread (serial)
+ 2678 start (in EnTeP) + 52 [0x100001464]
+ 2678 main (in EnTeP) + 34 [0x100001492] main.m:13
+ 2678 NSApplicationMain (in AppKit) + 867 [0x7fff9234652a]
+ 2678 -[NSApplication run] (in AppKit) + 463 [0x7fff920c83d6]
+ 2678 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit) + 135
[0x7fff920cba95]
+ 2678 _DPSNextEvent (in AppKit) + 1247 [0x7fff920cc3dd]
+ 2678 AEProcessAppleEvent (in HIToolbox) + 102
[0x7fff8f9cb12d]
+ 2678 aeProcessAppleEvent (in AE) + 250 [0x7fff9381e857]
+ 2678 _ZL25dispatchEventAndSendReplyPK6AEDescPS_ (in AE)
+ 38 [0x7fff9381e963]
+ 2678 aeDispatchAppleEvent(AEDesc const*, AEDesc*,
unsigned int, unsigned char*) (in AE) + 200 [0x7fff9381ea85]
+ 2678 _NSAppleEventManagerGenericHandler (in
Foundation) + 105 [0x7fff8e30afdc]
+ 2678 -[NSAppleEventManager
dispatchRawAppleEvent:withRawReply:handlerRefCon:] (in Foundation) + 283
[0x7fff8e30b14e]
+ 2678 __-[NSAppleEventManager
setEventHandler:andSelector:forEventClass:andEventID:]_block_invoke_1 (in
Foundation) + 101 [0x7fff8e30c1c7]
+ 2678 -[NSObject
performSelector:withObject:withObject:] (in CoreFoundation) + 65
[0x7fff98ceaf51]
+ 2678 -[NSApplication(NSAppleEventHandling)
_handleCoreEvent:withReplyEvent:] (in AppKit) + 330 [0x7fff920cefb1]
+ 2678 -[NSApplication(NSAppleEventHandling)
_handleAEOpenEvent:] (in AppKit) + 242 [0x7fff920cf250]
+ 2678 -[NSApplication
_sendFinishLaunchingNotification] (in AppKit) + 78 [0x7fff920d04df]
+ 2678 -[NSApplication
_postDidFinishNotification] (in AppKit) + 212 [0x7fff920d0779]
+ 2678 -[NSNotificationCenter
postNotificationName:object:userInfo:] (in Foundation) + 65 [0x7fff8e2d59cb]
+ 2678 _CFXNotificationPost (in
CoreFoundation) + 2634 [0x7fff98ca151a]
+ 2678 __-[NSNotificationCenter
addObserver:selector:name:object:]_block_invoke_1 (in Foundation) + 47
[0x7fff8e2e9716]
+ 2678 -[FeuchtDel
applicationDidFinishLaunching:] (in EnTeP) + 3264 [0x100002570]
FeuchtDel.m:778
+ 2678 -[FeuchtDel takeEvent:]
(in EnTeP) + 59 [0x1000035fb] FeuchtDel.m:1597
+ 2678 -[MyDocument
takkeEvent:] (in EnTeP) + 1654 [0x1000196e6] MyDocument.m:1063
+ 2678 -[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:] (in AppKit) + 92
[0x7fff9246ae33]
+ 2678 -[NSDocument
performActivityWithSynchronousWaiting:usingBlock:] (in AppKit) + 82
[0x7fff924834b6]
+ 2678 __-[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]_block_invoke_1 (in
AppKit) + 192 [0x7fff9246aef9]
+ 2678 -[NSDocument
_commitEditingWithDelegate:didSomethingSelector:contextInfo:thenContinue:] (in
AppKit) + 91 [0x7fff924762ab]
+ 2678 -[NSDocument
_commitEditingThenContinue:] (in AppKit) + 337 [0x7fff9247a5e0]
+ 2678
__-[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]_block_invoke_2 (in
AppKit) + 527 [0x7fff9246b170]
+ 2678
__-[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]_block_invoke_6 (in
AppKit) + 290 [0x7fff9246b439]
+ 2678
-[NSDocument _checkForFileChangesThenSave:saveAs:orCancel:] (in AppKit) + 797
[0x7fff924803cf]
+ 2678
__-[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]_block_invoke_7 (in
AppKit) + 114 [0x7fff9246b5c0]
+ 2678
-[NSDocument continueActivityUsingBlock:] (in AppKit) + 42 [0x7fff92467823]
+ 2678
__-[NSDocument
saveDocumentWithDelegate:didSaveSelector:contextInfo:]_block_invoke_8 (in
AppKit) + 194 [0x7fff9246ba13]
+
2678 -[NSDocument
saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo:] (in
AppKit) + 112 [0x7fff9246c2cc]
+
2678 -[NSDocument performActivityWithSynchronousWaiting:usingBlock:] (in
AppKit) + 82 [0x7fff924834b6]
+
2678 __-[NSDocument
saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo:]_block_invoke_1
(in AppKit) + 344 [0x7fff9246c42a]
+
2678 -[NSDocument
_commitEditingWithDelegate:didSomethingSelector:contextInfo:thenContinue:] (in
AppKit) + 91 [0x7fff924762ab]
+
2678 -[NSDocument _commitEditingThenContinue:] (in AppKit) + 337
[0x7fff9247a5e0]
+
2678 __-[NSDocument
saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo:]_block_invoke_2
(in AppKit) + 131 [0x7fff9246c555]
+
2678 -[NSDocument saveToURL:ofType:forSaveOperation:completionHandler:]
(in AppKit) + 91 [0x7fff9246d860]
+
2678 -[NSDocument performAsynchronousFileAccessUsingBlock:] (in
AppKit) + 304 [0x7fff9248316b]
+
2678 -[NSDocument _performFileAccessOnMainThread:usingBlock:] (in
AppKit) + 466 [0x7fff92483413]
+
2678 -[NSDocument continueFileAccessUsingBlock:] (in AppKit) +
227 [0x7fff92468bda]
+
2678 __-[NSDocument
saveToURL:ofType:forSaveOperation:completionHandler:]_block_invoke_1 (in
AppKit) + 845 [0x7fff9246dbb3]
+
2678 -[NSDocument
_fileCoordinator:coordinateReadingContentsAndWritingItemAtURL:byAccessor:] (in
AppKit) + 248 [0x7fff9247f6fc]
+
2678 -[NSFileCoordinator(NSPrivate)
_coordinateReadingItemAtURL:options:writingItemAtURL:options:error:byAccessor:]
(in Foundation) + 677 [0x7fff8e4c2234]
+
2678 -[NSFileCoordinator(NSPrivate) _blockOnAccessClaim:]
(in Foundation) + 183 [0x7fff8e4c2bdb]
+
2678 _dispatch_semaphore_wait_slow (in
libdispatch.dylib) + 109 [0x7fff90f9808e]
+
2678 semaphore_wait_trap (in libsystem_kernel.dylib)
+ 10 [0x7fff910b86b6]
2678 Thread_175779 DispatchQueue_2: com.apple.libdispatch-manager
(serial)
+ 2678 _dispatch_mgr_thread (in libdispatch.dylib) + 54 [0x7fff90f9519e]
+ 2678 _dispatch_mgr_invoke (in libdispatch.dylib) + 923
[0x7fff90f9660e]
+ 2678 kevent (in libsystem_kernel.dylib) + 10 [0x7fff910ba7e6]
2678 Thread_175818: com.apple.CFSocket.private
2678 thread_start (in libsystem_c.dylib) + 13 [0x7fff93425b75]
2678 _pthread_start (in libsystem_c.dylib) + 335 [0x7fff934228bf]
2678 __CFSocketManager (in CoreFoundation) + 1355 [0x7fff98cd666b]
2678 __select (in libsystem_kernel.dylib) + 10 [0x7fff910b9df2]
Total number in stack (recursive counted multiple, when >=5):
Sort by top of stack, same collapsed (when >= 5):
__select (in libsystem_kernel.dylib) 2678
kevent (in libsystem_kernel.dylib) 2678
semaphore_wait_trap (in libsystem_kernel.dylib) 2678
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