I've been reported more and more often about crashes due to a EXC_BAD_ACCESS exception in my app, by users on Mavericks. However, I can't figure out why, and I can't reproduce it.
Any idea what I what insights I could get from the log below? Is something wrong with the datasource of the table?
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000024048904
VM Regions Near 0x24048904:
MALLOC_LARGE 000000001a362000-000000001aa92000 [ 7360K]
rw-/rwx SM=PRV
-->
__TEXT 0000000050000000-00000000502c5000 [ 2836K]
r-x/rwx SM=COW
/System/Library/Extensions/AMDRadeonX3000GLDriver.bundle/Contents/MacOS/AMDRadeonX3000GLDriver
Application Specific Information:
objc_msgSend() selector name: count
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x93b930ab objc_msgSend + 27
1 com.apple.AppKit 0x970b6305 -[NSTableView
_dataSourceValueForColumn:row:] + 69
2 com.apple.AppKit 0x971ba127 -[NSTableView
preparedCellAtColumn:row:] + 385
3 com.apple.AppKit 0x971b9e25 -[NSTableView
_drawContentsAtRow:column:withCellFrame:] + 50
4 com.apple.AppKit 0x971b9bf2 -[NSTableView
drawRow:clipRect:] + 1502
5 com.apple.AppKit 0x971b94bf -[NSTableView
drawRowIndexes:clipRect:] + 801
6 com.apple.AppKit 0x9708cc94 -[NSTableView drawRect:]
+ 1254
7 com.apple.AppKit 0x97072194 -[NSView(NSInternal)
_recursive:displayRectIgnoringOpacity:inGraphicsContext:CGContext:topView:shouldChangeFontReferenceColor:]
+ 1174
8 com.apple.AppKit 0x97071bec
__46-[NSView(NSLayerKitGlue) drawLayer:inContext:]_block_invoke + 220
9 com.apple.AppKit 0x97071971 -[NSView(NSLayerKitGlue)
_drawViewBackingLayer:inContext:drawingHandler:] + 2237
10 com.apple.AppKit 0x970710a8 -[NSView(NSLayerKitGlue)
drawLayer:inContext:] + 116
11 com.apple.AppKit 0x97071029 -[_NSViewBackingLayer
drawInContext:] + 65
The cause may be you still storing NSTableView dataSource
or delegate
reference as it is said above the properties setter and getter methods in NSTableView.h
The dataSource is a weak reference (non retained) in non garbage collected applications. Under garbage collected apps, it is a strong reference.
Try to call some special method when you are about to destruct your view with all the children including table view.
- (void)shutdown
{
self.tableView.dataSource = nil;
self.tableView.delegate = nil;
}