Re: Core Animation Deadlock
I may have the bug isolated. I fixed a bug in my own code, and the deadlock is no longer happening. It may be related to a situation involving removing a sublayer from it's super. In my code I was removing a layer that I didn't intend to remove, and the deadlock would result. I still think there is an underlying bug in CoreAnimation. Certainly you shouldn't be able to cause a deadlock. If I can isolate the bug to a specific case I will build a test case and submit. On Apr 24, 2008, at 11:11 PM, Colin Cornaby wrote: Enabled NSZombie and friends didn't seem to fix the issue (or log anything.) This isn't going to be too easy to track down. Once I figure out what series of events is triggering it I will try to put together a test case. On Apr 24, 2008, at 9:14 PM, John Harper wrote: On Apr 24, 2008, at 7:38 PM, Colin Cornaby wrote: It looks like NSUIHeartBeat could be attempting to lock something. Although I could be wrong, it may not be related. The render thread got stuck while depth sorting: Thread 11 (process 13823 thread 0x8803): #0 0x90a27d9c in CARenderLayerDepthSortSublayers () #1 0x90a27611 in prepare_layer0 () #2 0x90a27597 in prepare_layer0 () #3 0x90a27597 in prepare_layer0 () #4 0x90a26dd4 in CARenderUpdateAddContext () #5 0x90a25f72 in view_draw () #6 0x90a34f60 in view_display_link () #7 0x90a26936 in link_callback () #8 0x94cc1015 in CVDisplayLink::performIO () #9 0x94cc1641 in CVDisplayLink::runIOThread () #10 0x958e06f5 in _pthread_start () #11 0x958e05b2 in thread_start () this is done while holding the lock the main thread is trying to take. I can't think of any way you could cause this other than heap corruption, or maybe over-releasing objects, so it could be a CA bug. I would try running with NSZombies enabled first; if you don't see anything wrong that way, file a bug report (with a test case showing the hang if possible, otherwise there's probably no way we can debug it…) John ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/colin.cornaby%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Core Animation Deadlock
Hi, I'm currently trying to track down a deadlock. After adding a series of layers, CoreAnimation deadlocks here on the main thread: #0 0x958af4ee in semaphore_wait_signal_trap #1 0x958b6fc5 in pthread_mutex_lock #2 0x909f8d72 in CAContextCommitTransaction #3 0x909f89bd in CATransactionCommit #4 0x90375351 in -[NSView(NSLayerKitGlue) _drawRectAsLayerTree:] #5 0x9010ab1e in -[NSView _drawRect:clip:] #6 0x901091ed in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #7 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #8 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #9 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #10 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #11 0x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #12 0x9010870b in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] #13 0x9010522f in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] #14 0x90045c87 in -[NSView displayIfNeeded] #15 0x90045835 in -[NSWindow displayIfNeeded] #16 0x90045658 in _handleWindowNeedsDisplay #17 0x910f89a2 in __CFRunLoopDoObservers #18 0x910f9d05 in CFRunLoopRunSpecific #19 0x910facf8 in CFRunLoopRunInMode #20 0x9159fda4 in RunCurrentEventLoopInMode #21 0x9159faf6 in ReceiveNextEventCommon #22 0x9159fa31 in BlockUntilNextEventMatchingListInMode #23 0x900434fd in _DPSNextEvent #24 0x90042db0 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] #25 0x9003bdeb in -[NSApplication run] #26 0x90009028 in NSApplicationMain #27 0x7401 in main at main.m:13 There are a bunch of other threads, too many to reasonably list in a message to the list. While I continue debugging and trying to track down what I'm doing that starts the deadlock, does anyone have any general ideas on where it would be best to look? Thanks, Colin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Core Animation Deadlock
You could also show any other thread stuck trying to lock a mutex? I assume there's another thread holding this lock or stuck trying to lock something else. Colin Cornaby wrote: Hi, I'm currently trying to track down a deadlock. After adding a series of layers, CoreAnimation deadlocks here on the main thread: #00x958af4ee in semaphore_wait_signal_trap #10x958b6fc5 in pthread_mutex_lock #20x909f8d72 in CAContextCommitTransaction #30x909f89bd in CATransactionCommit #40x90375351 in -[NSView(NSLayerKitGlue) _drawRectAsLayerTree:] #50x9010ab1e in -[NSView _drawRect:clip:] #60x901091ed in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #70x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #80x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #90x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #100x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #110x90109c23 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #120x9010870b in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] #130x9010522f in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] #140x90045c87 in -[NSView displayIfNeeded] #150x90045835 in -[NSWindow displayIfNeeded] #160x90045658 in _handleWindowNeedsDisplay #170x910f89a2 in __CFRunLoopDoObservers #180x910f9d05 in CFRunLoopRunSpecific #190x910facf8 in CFRunLoopRunInMode #200x9159fda4 in RunCurrentEventLoopInMode #210x9159faf6 in ReceiveNextEventCommon #220x9159fa31 in BlockUntilNextEventMatchingListInMode #230x900434fd in _DPSNextEvent #240x90042db0 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] #250x9003bdeb in -[NSApplication run] #260x90009028 in NSApplicationMain #270x7401 in main at main.m:13 There are a bunch of other threads, too many to reasonably list in a message to the list. While I continue debugging and trying to track down what I'm doing that starts the deadlock, does anyone have any general ideas on where it would be best to look? Thanks, Colin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/jstiles%40blizzard.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Core Animation Deadlock
It looks like NSUIHeartBeat could be attempting to lock something. Although I could be wrong, it may not be related. Here's the full stack trace across all threads. (gdb) thread apply all bt Thread 37 (process 13823 thread 0xf11b): #0 0x958af506 in semaphore_timedwait_signal_trap () #1 0x958e184f in _pthread_cond_wait () #2 0x958e30d3 in pthread_cond_timedwait_relative_np () #3 0x90e5ae8c in -[NSCondition waitUntilDate:] () #4 0x90e5aca0 in -[NSConditionLock lockWhenCondition:beforeDate:] () #5 0x90e5ac05 in -[NSConditionLock lockWhenCondition:] () #6 0x900a9468 in -[NSUIHeartBeat _heartBeatThread:] () #7 0x90e14f1d in -[NSThread main] () #8 0x90e14ac4 in __NSThread__main__ () #9 0x958e06f5 in _pthread_start () #10 0x958e05b2 in thread_start () Thread 36 (process 13823 thread 0xf207): #0 0x958af506 in semaphore_timedwait_signal_trap () #1 0x958e184f in _pthread_cond_wait () #2 0x958e30d3 in pthread_cond_timedwait_relative_np () #3 0x96dd52fe in TSWaitOnConditionTimedRelative () #4 0x96df5fc4 in MPWaitOnQueue () #5 0x918f99b8 in TFolderSizeTask::FolderSizeTaskProc () #6 0x96df455b in PrivateMPEntryPoint () #7 0x958e06f5 in _pthread_start () #8 0x958e05b2 in thread_start () Thread 35 (process 13823 thread 0xf513): #0 0x958af506 in semaphore_timedwait_signal_trap () #1 0x958e184f in _pthread_cond_wait () #2 0x958e30d3 in pthread_cond_timedwait_relative_np () #3 0x96dd52fe in TSWaitOnConditionTimedRelative () #4 0x96df5fc4 in MPWaitOnQueue () #5 0x918f99b8 in TFolderSizeTask::FolderSizeTaskProc () #6 0x96df455b in PrivateMPEntryPoint () #7 0x958e06f5 in _pthread_start () #8 0x958e05b2 in thread_start () Thread 34 (process 13823 thread 0xcf57): #0 0x958af506 in semaphore_timedwait_signal_trap () #1 0x958e184f in _pthread_cond_wait () #2 0x958e30d3 in pthread_cond_timedwait_relative_np () #3 0x96dd52fe in TSWaitOnConditionTimedRelative () #4 0x96df5fc4 in MPWaitOnQueue () #5 0x918f99b8 in TFolderSizeTask::FolderSizeTaskProc () #6 0x96df455b in PrivateMPEntryPoint () #7 0x958e06f5 in _pthread_start () #8 0x958e05b2 in thread_start () Thread 33 (process 13823 thread 0xe35f): #0 0x958ff5e2 in select$DARWIN_EXTSN () #1 0x9110550f in __CFSocketManager () #2 0x958e06f5 in _pthread_start () #3 0x958e05b2 in thread_start () Thread 32 (process 13823 thread 0xdc07): #0 0x958dff66 in kevent () #1 0x910cf39f in __monitor_file_descriptor__ () #2 0x958e06f5 in _pthread_start () #3 0x958e05b2 in thread_start () Thread 31 (process 13823 thread 0xce57): #0 0x958af506 in semaphore_timedwait_signal_trap () #1 0x958e184f in _pthread_cond_wait () #2 0x958e30d3 in pthread_cond_timedwait_relative_np () #3 0x96dd52fe in TSWaitOnConditionTimedRelative () #4 0x96df5fc4 in MPWaitOnQueue () #5 0x918ff3bb in TPropertyTask::PropertyTaskProc () #6 0x96df455b in PrivateMPEntryPoint () #7 0x958e06f5 in _pthread_start () #8 0x958e05b2 in thread_start () Thread 30 (process 13823 thread 0xc657): #0 0x958b668e in __semwait_signal () #1 0x958e1986 in _pthread_cond_wait () #2 0x958e136d in pthread_cond_wait$UNIX2003 () #3 0x96df6347 in TSWaitOnCondition () #4 0x96dd52d2 in TSWaitOnConditionTimedRelative () #5 0x96df5fc4 in MPWaitOnQueue () #6 0x918f7a6e in TNodeSyncTask::SyncTaskProc () #7 0x96df455b in PrivateMPEntryPoint () #8 0x958e06f5 in _pthread_start () #9 0x958e05b2 in thread_start () Thread 29 (process 13823 thread 0xb803): #0 0x958af4a6 in mach_msg_trap () #1 0x958b6c9c in mach_msg () #2 0x910fa0be in CFRunLoopRunSpecific () #3 0x910fad54 in CFRunLoopRun () #4 0x918ec5dc in TFSEventsNotificationTask::FSEventsNotificationTaskProc () #5 0x96df455b in PrivateMPEntryPoint () #6 0x958e06f5 in _pthread_start () #7 0x958e05b2 in thread_start () Thread 28 (process 13823 thread 0xb407): #0 0x958af4a6 in mach_msg_trap () #1 0x958b6c9c in mach_msg () #2 0x910fa0be in CFRunLoopRunSpecific () #3 0x910fad54 in CFRunLoopRun () #4 0x918ec463 in TSystemNotificationTask::SystemNotificationTaskProc () #5 0x96df455b in PrivateMPEntryPoint () #6 0x958e06f5 in _pthread_start () #7 0x958e05b2 in thread_start () Thread 27 (process 13823 thread 0xb203): #0 0x in ?? () Cannot access memory at address 0x0 Thread 26 (process 13823 thread 0x320f): #0 0x in ?? () Cannot access memory at address 0x0 Thread 25 (process 13823 thread 0x5e0f): #0 0x in ?? () Cannot access memory at address 0x0 Thread 24 (process 13823 thread 0x5d1b): #0 0x in ?? () Cannot access memory at address 0x0 Thread 23 (process 13823 thread 0x7e0b): #0 0x in ?? () Cannot access memory at address 0x0 Thread 22 (process 13823 thread 0xb007): #0 0x in ?? () Cannot access memory at address 0x0 Thread 21 (process 13823 thread 0x7c47): #0 0x in ?? () Cannot access memory at address 0x0 Thread 20 (process 13823 thread 0xaf27): #0 0x9591907a in __workq_ops () #1 0x9591a772 in workqueue_exit () #2 0x959190aa in start_wqthread () Thread 19
Re: Core Animation Deadlock
On Apr 24, 2008, at 7:38 PM, Colin Cornaby wrote: It looks like NSUIHeartBeat could be attempting to lock something. Although I could be wrong, it may not be related. The render thread got stuck while depth sorting: Thread 11 (process 13823 thread 0x8803): #0 0x90a27d9c in CARenderLayerDepthSortSublayers () #1 0x90a27611 in prepare_layer0 () #2 0x90a27597 in prepare_layer0 () #3 0x90a27597 in prepare_layer0 () #4 0x90a26dd4 in CARenderUpdateAddContext () #5 0x90a25f72 in view_draw () #6 0x90a34f60 in view_display_link () #7 0x90a26936 in link_callback () #8 0x94cc1015 in CVDisplayLink::performIO () #9 0x94cc1641 in CVDisplayLink::runIOThread () #10 0x958e06f5 in _pthread_start () #11 0x958e05b2 in thread_start () this is done while holding the lock the main thread is trying to take. I can't think of any way you could cause this other than heap corruption, or maybe over-releasing objects, so it could be a CA bug. I would try running with NSZombies enabled first; if you don't see anything wrong that way, file a bug report (with a test case showing the hang if possible, otherwise there's probably no way we can debug it…) John ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
