Font-related crash in drawing method on PowerPC machines
Font-related crash in drawing method on PowerPC machines
- Subject: Font-related crash in drawing method on PowerPC machines
- From: "Justin Williams" <email@hidden>
- Date: Tue, 22 Apr 2008 10:07:56 -0500
Hi,
I'm running into an odd crasher on PowerPC machines. I have a custom
NSView called TYCurrentDayView that draws an nsmutableattributedstring
on top of a gradient. On a few instances, I will receive the
following crash:
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x000000000000001f
Crashed Thread: 0
Application Specific Information:
objc[24283]: garbage collection is ON
Thread 0 Crashed:
0 libobjc.A.dylib 0xfffeff18 objc_msgSend_rtp + 24
1 com.apple.AppKit 0x93d33c3c -[NSATSGlyphStorage
setGlyphRange:characterRange:] + 2424
2 com.apple.AppKit 0x93d331b4 -[NSATSTypesetter
_ctTypesetter] + 276
3 com.apple.AppKit 0x93d324f0 -[NSATSLineFragment
layoutForStartingGlyphAtIndex:characterIndex:minPosition:maxPosition:lineFragmentRect:]
+ 92
4 com.apple.AppKit 0x93d316d0 -[NSATSTypesetter
_layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext:]
+ 1916
5 com.apple.AppKit 0x93d30b18 -[NSSingleLineTypesetter
createRenderingContextForCharacterRange:typesetterBehavior:usesScreenFonts:hasStrongRight:maximumWidth:]
+ 388
6 com.apple.AppKit 0x93d81b38
__NSCreateRenderingContextForAttributedString + 288
7 com.apple.AppKit 0x93d25680
-[NSAttributedString(NSExtendedStringDrawing)
boundingRectWithSize:options:] + 1052
8 com.apple.AppKit 0x93df067c
-[NSAttributedString(NSStringDrawing) size] + 52
9 com.secondgear.today 0x00008054 -[TYCurrentDayView
drawRect:] + 900
10 com.apple.AppKit 0x93dad044 -[NSView _drawRect:clip:] + 2908
11 com.apple.AppKit 0x93dac02c -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 844
12 com.apple.AppKit 0x93dac2d0 -[NSView
_recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1520
(Full Trace at http://secondgearllc.com/attachments/42208crasher.txt)
The code itself that looks to be causing the issue is:
NSMutableAttributedString *todaysDate = [[NSMutableAttributedString
alloc] init];
NSMutableAttributedString *datePrefix = [[NSMutableAttributedString
alloc] initWithString:NSLocalizedString(@"Today is ", @"Today Is
String")];
NSMutableAttributedString *actualDate = [[NSMutableAttributedString
alloc] initWithString:[NSString stringWithFormat:@"%@", [dateFormatter
stringFromDate:self.currentDay]]];
[todaysDate appendAttributedString:datePrefix];
[todaysDate appendAttributedString:actualDate];
NSRange fullDateRange = NSMakeRange(0, todaysDate.length);
NSRange dateOnlyRange = NSMakeRange(9,
todaysDate.length-datePrefix.length); // The amount of chars in "Today
is "
[todaysDate beginEditing];
[todaysDate addAttribute:NSFontAttributeName value:[NSFont
fontWithName:@"Lucida Grande" size:16.0] range:fullDateRange];
[todaysDate addAttribute:NSFontAttributeName value:[NSFont
fontWithName:@"Lucida Grande Bold" size:16.0] range:dateOnlyRange];
[todaysDate addAttribute:NSForegroundColorAttributeName value:[NSColor
whiteColor] range:fullDateRange];
[todaysDate addAttribute:NSKernAttributeName value:[NSNumber
numberWithFloat:0.5] range:fullDateRange];
[todaysDate endEditing];
I've never been able to reproduce it on any Intel machines, but it
happens about 10-20% of the time on PowerPC Macs.
Any help would be appreciated.
-
Justin Williams
email@hidden
http://secondgearllc.com/
-
Check out Today: iCal's new best friend <http://secondgearllc.com/today/>-
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