Hi
We're using CGPDFDocument to retrieve the PDF document and draw it in the UIView using CGContext.DrawPDFPage. While doing this operation, I was able to get an NSMallocException with a specific document.
I was able to get this exception only on real devices; emulators are working fine. The device used is the iPad (5th generation), which has iOS 16.7.8.
Steps to replicate:
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Open the application at the link (we have attached the sample with PDF file with the issue in the link) https://www.dropbox.com/scl/fi/mosvcnqc0nvxwdjf8k0m5/SimplePDFVieweriOS.zip?rlkey=0ntj75yjg71kjwtwwe06uax5v&st=mmv08e2f&dl=0
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Navigate through the pages using the next button.
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After the page navigation to page 7, and the application will throw an NSMallocException with the reason: Failed to grow buffer
Platform: Xamarin.iOS
Development tool: Visual Studio 2022
Stack trace for the issue:
Native stack trace:
0 CoreFoundation 0x00000001b32e9418 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 37912
1 libobjc.A.dylib 0x00000001ac63dc28 objc_exception_throw + 56
2 CoreFoundation 0x00000001b347c5c8 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 1689032
3 CoreFoundation 0x00000001b3474504 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 1656068
4 CoreFoundation 0x00000001b3363160 __CFSafelyReallocate + 68
5 CoreFoundation 0x00000001b33aae9c 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 831132
6 CoreFoundation 0x00000001b335af2c CFDataSetLength + 152
7 CoreGraphics 0x00000001b4ca71a4 CGDataProviderCopyData + 240
8 ImageIO 0x00000001b7fafd38 7E9A543E-EE3C-34B7-9EFE-D5F6357F2FA3 + 32056
9 ImageIO 0x00000001b7fb1124 7E9A543E-EE3C-34B7-9EFE-D5F6357F2FA3 + 37156
10 ImageIO 0x00000001b7ff7124 7E9A543E-EE3C-34B7-9EFE-D5F6357F2FA3 + 323876
11 ImageIO 0x00000001b7fb0fe0 CGImageSourceCreateWithDataProvider + 176
12 CoreGraphics 0x00000001b4d7ac0c EDFE1CE3-C3C4-30A2-AC92-099D20347781 + 1018892
13 CoreGraphics 0x00000001b4d7a9a0 CGPDFImageCreateImage + 208
14 CoreGraphics 0x00000001b4decbc8 EDFE1CE3-C3C4-30A2-AC92-099D20347781 + 1485768
15 CoreGraphics 0x00000001b4d26e34 EDFE1CE3-C3C4-30A2-AC92-099D20347781 + 675380
16 CoreGraphics 0x00000001b4d2f7c4 EDFE1CE3-C3C4-30A2-AC92-099D20347781 + 710596
17 CoreGraphics 0x00000001b4ce16dc CGPDFScannerScan + 436
18 CoreGraphics 0x00000001b5073198 CGPDFDrawingContextDraw + 112
19 CoreGraphics 0x00000001b4d271b0 EDFE1CE3-C3C4-30A2-AC92-099D20347781 + 676272
20 CoreGraphics 0x00000001b4d2f7c4 EDFE1CE3-C3C4-30A2-AC92-099D20347781 + 710596
21 CoreGraphics 0x00000001b4ce16dc CGPDFScannerScan + 436
22 CoreGraphics 0x00000001b4d3f68c CGContextDrawPDFPageWithDrawingCallbacks + 2680
23 CoreGraphics 0x00000001b4cdb04c CGContextDrawPDFPage + 32
24 SimplePDFViewer 0x0000000100f0cb90 SimplePDFViewer + 1969040
25 SimplePDFViewer 0x0000000100eeb3c0 SimplePDFViewer + 1831872
26 SimplePDFViewer 0x0000000100d35b14 SimplePDFViewer + 39700
27 SimplePDFViewer 0x0000000100e8eb80 SimplePDFViewer + 1452928
28 SimplePDFViewer 0x0000000100f483f4 mono_pmip + 25092
29 SimplePDFViewer 0x0000000100fd8b90 mono_pmip + 616864
30 SimplePDFViewer 0x0000000100fdc014 mono_pmip + 630308
31 SimplePDFViewer 0x0000000100d32450 SimplePDFViewer + 25680
32 SimplePDFViewer 0x0000000100d32328 SimplePDFViewer + 25384
33 UIKitCore 0x00000001b5412150 27A9C298-B702-3C39-8C06-07196E4CD16B + 1667408
34 QuartzCore 0x00000001b47990e8 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 119016
35 QuartzCore 0x00000001b480adb8 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 585144
36 QuartzCore 0x00000001b47987a8 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 116648
37 QuartzCore 0x00000001b4798034 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 114740
38 QuartzCore 0x00000001b47a89f0 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 182768
39 QuartzCore 0x00000001b47d5dc0 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 368064
40 QuartzCore 0x00000001b47c0dc8 9E40B2EB-260C-3AF1-AE45-A1A551A8C1B9 + 282056
41 CoreFoundation 0x00000001b33698e8 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 563432
42 CoreFoundation 0x00000001b32f951c 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 103708
43 CoreFoundation 0x00000001b3355214 55B9BA28-4C5C-3FE7-9C47-4983337D6E83 + 479764
44 CoreFoundation 0x00000001b3359d20 CFRunLoopRunSpecific + 584
45 GraphicsServices 0x00000001eab69998 GSEventRunModal + 160
46 UIKitCore 0x00000001b55ec448 27A9C298-B702-3C39-8C06-07196E4CD16B + 3609672
47 UIKitCore 0x00000001b55ec0c0 UIApplicationMain + 312
48 SimplePDFViewer 0x000000010106b350 xamarin_UIApplicationMain + 60
49 SimplePDFViewer 0x0000000100f0de18 SimplePDFViewer + 1973784
50 SimplePDFViewer 0x0000000100eecd4c SimplePDFViewer + 1838412
51 SimplePDFViewer 0x0000000100eece70 SimplePDFViewer + 1838704
52 SimplePDFViewer 0x0000000100d33ad0 SimplePDFViewer + 31440
53 SimplePDFViewer 0x0000000100e8eb80 SimplePDFViewer + 1452928
54 SimplePDFViewer 0x0000000100f483f4 mono_pmip + 25092
55 SimplePDFViewer 0x0000000100fd8b90 mono_pmip + 616864
56 SimplePDFViewer 0x0000000100fddbdc mono_pmip + 637420
57 SimplePDFViewer 0x0000000100f2d5ec SimplePDFViewer + 2102764
58 SimplePDFViewer 0x00000001010802dc xamarin_log + 22464
59 SimplePDFViewer 0x0000000100d334bc SimplePDFViewer + 29884
60 dyld 0x00000001d0b04344 8A4B89B7-D348-375B-97B1-FC8A84E3E5CE + 82756
Kindly let us know if you need any further details regarding this issue.