Crashes when device detached

[daemonx01]

While reading data from the iPhone, if the device is detached the application crashes immediately.

Is there not any exception or crash handling? How to prevent it? Application shouldn't crash but give error instead. There seems to be problem with it.

[samdmarshall]

Hi, I am happy to take a look at this problem. While it sounds familiar to an issue that was previously brought to my attention, I'm going to ask that you attach a crash report and sample repo to show this behavior. I've updated the contributing guidelines to accurately reflect what I need from you to move forward with this, thanks!

[daemonx01]

Heres the sample code. While reading file from iPhone, if device detached app crashes.

https://gist.github.com/bilawal230/0f0063705bca0f849f7b

[daemonx01]

heres the crash log:

CoreFoundation`CFDataGetLength: 0x7fff99b06a60: pushq %rbp 0x7fff99b06a61: movq %rsp, %rbp 0x7fff99b06a64: pushq %r14 0x7fff99b06a66: pushq %rbx 0x7fff99b06a67: movq %rdi, %rbx 0x7fff99b06a6a: cmpq $-0x1, -0x1cbd00ea(%rip) ; CFCheckForExpandedSet.warnedOnce + 3 0x7fff99b06a72: jne 0x7fff99b06ade ; CFDataGetLength + 126 0x7fff99b06a74: testb $0x1, %bl 0x7fff99b06a77: jne 0x7fff99b06aca ; CFDataGetLength + 106 0x7fff99b06a79: movq (%rbx), %rax 0x7fff99b06a7c: testq %rax, %rax 0x7fff99b06a7f: je 0x7fff99b06ac1 ; CFDataGetLength + 97 0x7fff99b06a81: leaq -0x1cbd0700(%rip), %rcx ; CFConstantStringClassReferencePtr 0x7fff99b06a88: cmpq (%rcx), %rax 0x7fff99b06a8b: je 0x7fff99b06ac1 ; CFDataGetLength + 97 0x7fff99b06a8d: movq -0x1cbd0104(%rip), %rcx ; kCFDataTypeID 0x7fff99b06a94: xorl %r14d, %r14d 0x7fff99b06a97: cmpq $0x3ff, %rcx 0x7fff99b06a9e: ja 0x7fff99b06aab ; CFDataGetLength + 75 0x7fff99b06aa0: leaq -0x1cbd2727(%rip), %rdx ; CFRuntimeObjCClassTable 0x7fff99b06aa7: movq (%rdx,%rcx,8), %r14 0x7fff99b06aab: cmpq %r14, %rax 0x7fff99b06aae: je 0x7fff99b06ac1 ; CFDataGetLength + 97 0x7fff99b06ab0: testb $0x1, %al 0x7fff99b06ab2: je 0x7fff99b06aca ; CFDataGetLength + 106 0x7fff99b06ab4: movq %rbx, %rdi 0x7fff99b06ab7: callq 0x7fff99ca6d7a ; symbol stub for: object_getClass 0x7fff99b06abc: cmpq %r14, %rax 0x7fff99b06abf: jne 0x7fff99b06aca ; CFDataGetLength + 106 0x7fff99b06ac1: movq 0x10(%rbx), %rax 0x7fff99b06ac5: popq %rbx 0x7fff99b06ac6: popq %r14 0x7fff99b06ac8: popq %rbp 0x7fff99b06ac9: retq
0x7fff99b06aca: movq -0x1cbde021(%rip), %rsi ; "length" 0x7fff99b06ad1: movq %rbx, %rdi 0x7fff99b06ad4: popq %rbx 0x7fff99b06ad5: popq %r14 0x7fff99b06ad7: popq %rbp 0x7fff99b06ad8: jmpq -0x1cc218be(%rip) ; (void )0x00007fff97b900c0: objc_msgSend 0x7fff99b06ade: leaq -0x1cbd015d(%rip), %rdi ; CFDataGetTypeID.initOnce 0x7fff99b06ae5: leaq -0x1cc1f23c(%rip), %rsi ; __block_literal_global 0x7fff99b06aec: callq 0x7fff99ca7098 ; symbol stub for: dispatch_once 0x7fff99b06af1: jmp 0x7fff99b06a74 ; CFDataGetLength + 20 0x7fff99b06af3: nopw %cs:(%rax,%rax)

[daemonx01]

crash comes on this line in the library:

        case SDMMD_AFC_Packet_GetFileInfo: {
            bool should_parse = false;
            CFIndex data_length = CFDataGetLength((*operation)->ivars.packet->response);
            if (data_length == sizeof(uint64_t)) {
                uint64_t response;
                memcpy(&response, CFDataGetBytePtr((*operation)->ivars.packet->response), data_length);
                if (response != 8 && response != 4) {
                    // this file can be accessed.
                    should_parse = true;
                }
            }

[daemonx01]

line : CFIndex data_length = CFDataGetLength((*operation)->ivars.packet->response);

Similarly if i try to fix it with null checks, there comes more crashes in other functions and thread.

[samdmarshall]

I would like to have a reproducible case to test this against to determine if this is the issue i'm thinking of (accessing a bad file descriptor) or something new.

Please look at the CONTIBUTING.md file for guidelines on the requested materials. what you have posted here aren't crash logs, they are the disassembly of where it stopped. You will have to run the code outside of Xcode without a debugger attached to have it generate a crash log. You can find crash logs by opening the Console.app and looking under "User Diagnostic Reports".

Thanks!

[daemonx01]

Thank you for replying and letting me know the correct method to find crash logs.

here it is: https://gist.github.com/bilawal230/71d68fba5017f96a9138

[daemonx01]

here's the sample project, it's same as i posted before if you detach device while reading file from device, it will crash.

https://www.dropbox.com/s/f8cpqfhf176jvgt/SDMMDSAMPLE.zip?dl=0

[daemonx01]

here's the crash log:

Process: iPhoneTestIOSCocoa [59982] Path: /Users/USER/Library/Developer/Xcode/DerivedData/iPhoneTestIOS-cytiiwmduaicxafcymnrihmiloyk/Build/Products/Debug/iPhoneTestIOSCocoa.app/Contents/MacOS/iPhoneTestIOSCocoa Identifier: com.sc.iPhoneTestIOSCocoa Version: 1.0 (1) Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: iPhoneTestIOSCocoa [59982] User ID: 503

Date/Time: 2015-07-30 16:40:46.224 +0500 OS Version: Mac OS X 10.10.1 (14B25) Report Version: 11 Anonymous UUID: 7FA63A4F-771A-4CAE-C525-AB70CCB79251

Sleep/Wake UUID: E36A41C2-85DE-457C-8D23-08E9D19A70A2

Time Awake Since Boot: 77000 seconds Time Since Wake: 1500 seconds

Crashed Thread: 0 Dispatch queue: com.samdmarshall.sdmmobiledevice.afc.b8cf53aaec1ca4073c72b997837714bf98f7e312.2015-07-30*16:40:37

Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000

VM Regions Near 0: --> __TEXT 0000000109d82000-0000000109ddf000 [ 372K] r-x/rwx SM=COW /Users/USER/Library/Developer/Xcode/DerivedData/iPhoneTestIOS-cytiiwmduaicxafcymnrihmiloyk/Build/Products/Debug/iPhoneTestIOSCocoa.app/Contents/MacOS/iPhoneTestIOSCocoa

Thread 0 Crashed:: Dispatch queue: com.samdmarshall.sdmmobiledevice.afc.b8cf53aaec1ca4073c72b997837714bf98f7e312.2015-07-30_16:40:37 0 com.apple.CoreFoundation 0x00007fff99b06a79 CFDataGetLength + 25 1 com.sc.iPhoneTestIOSCocoa 0x0000000109dc2a49 SDMMD_AFCProcessOperation_block_invoke + 345 (SDMMD_AppleFileConduit.c:268) 2 libdispatch.dylib 0x00007fff8dfeec13 _dispatch_client_callout + 8 3 libdispatch.dylib 0x00007fff8dfefe5e _dispatch_barrier_sync_f_invoke + 57 4 com.sc.iPhoneTestIOSCocoa 0x0000000109dc28bc SDMMD_AFCProcessOperation + 140 (SDMMD_AppleFileConduit.c:231) 5 com.sc.iPhoneTestIOSCocoa 0x0000000109d84f58 AFCFileDescriptorReadByPathOperationUsingSeek + 184 (iPhoneTestAFC.c:328) 6 com.sc.iPhoneTestIOSCocoa 0x0000000109d8767b AFCFileDescriptorReadDir + 7963 (iPhoneTestAFC.c:997) 7 com.sc.iPhoneTestIOSCocoa 0x0000000109db1c53 fetchMediaJson + 83 (iPhoneTestIOS.c:2182) 8 com.sc.iPhoneTestIOSCocoa 0x0000000109da46fc -[AppDelegate applicationDidFinishLaunching:] + 172 (AppDelegate.m:65) 9 com.apple.CoreFoundation 0x00007fff99bfecbc __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER + 12 10 com.apple.CoreFoundation 0x00007fff99af01b4 _CFXNotificationPost + 3140 11 com.apple.Foundation 0x00007fff8b07dea1 -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 12 com.apple.AppKit 0x00007fff8e04410b -[NSApplication _postDidFinishNotification] + 291 13 com.apple.AppKit 0x00007fff8e043e76 -[NSApplication _sendFinishLaunchingNotification] + 191 14 com.apple.AppKit 0x00007fff8e040c76 -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] + 574 15 com.apple.AppKit 0x00007fff8e0406b5 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 244 16 com.apple.Foundation 0x00007fff8b09d458 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 290 17 com.apple.Foundation 0x00007fff8b09d2c9 NSAppleEventManagerGenericHandler + 102 18 com.apple.AE 0x00007fff9509d99c aeDispatchAppleEvent(AEDesc const, AEDesc, unsigned int, unsigned char) + 531 19 com.apple.AE 0x00007fff9509d719 dispatchEventAndSendReply(AEDesc const, AEDesc) + 31 20 com.apple.AE 0x00007fff9509d623 aeProcessAppleEvent + 295 21 com.apple.HIToolbox 0x00007fff8b4ee37e AEProcessAppleEvent + 56 22 com.apple.AppKit 0x00007fff8e03cd76 _DPSNextEvent + 2665 23 com.apple.AppKit 0x00007fff8e03be80 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 194 24 com.apple.AppKit 0x00007fff8e02fe23 -[NSApplication run] + 594 25 com.apple.AppKit 0x00007fff8e01b2d4 NSApplicationMain + 1832 26 com.sc.iPhoneTestIOSCocoa 0x0000000109daad02 main + 34 (main.m:13) 27 libdyld.dylib 0x00007fff982105c9 start + 1

Thread 1:: Dispatch queue: com.apple.libdispatch-manager 0 libsystem_kernel.dylib 0x00007fff996a422e kevent64 + 10 1 libdispatch.dylib 0x00007fff8dff1a6a _dispatch_mgr_thread + 52

Thread 2: 0 libsystem_kernel.dylib 0x00007fff996a3946 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff994b94a1 start_wqthread + 13

Thread 3: 0 libsystem_kernel.dylib 0x00007fff996a3946 __workq_kernreturn + 10 1 libsystem_pthread.dylib 0x00007fff994b94a1 start_wqthread + 13

Thread 4:: Dispatch queue: com.samdmarshall.sdmmobiledevice.socketQueue 0 libcrypto.0.9.8.dylib 0x00007fff9a470aa1 BIO_free_all + 1 1 libssl.0.9.8.dylib 0x0000000109e40258 SSL_free + 152 2 com.sc.iPhoneTestIOSCocoa 0x0000000109db99ea SDMMD_AMDeviceRefFinalize + 138 (SDMMD_AMDevice_Class.c:69) 3 com.apple.CoreFoundation 0x00007fff99af8a0e CFRelease + 526 4 com.apple.CoreFoundation 0x00007fff99b1973d -[NSArrayI dealloc] + 125 5 libobjc.A.dylib 0x00007fff97bae68c objc_object::sidetable_release(bool) + 236 6 com.apple.CoreFoundation 0x00007fff99af8930 CFRelease + 304 7 com.sc.iPhoneTestIOSCocoa 0x0000000109d89823 CFSafeRelease + 35 (CFTypeAddition.c:338) 8 com.sc.iPhoneTestIOSCocoa 0x0000000109db810b SDMMD_USBMuxDetachedCallback + 331 (SDMMD_USBMuxListener.c:170) 9 com.sc.iPhoneTestIOSCocoa 0x0000000109db95c5 SDMMD_USBMuxStartListener_block_invoke_2 + 437 (SDMMD_USBMuxListener.c:384) 10 libdispatch.dylib 0x00007fff8dfeec13 _dispatch_client_callout + 8 11 libdispatch.dylib 0x00007fff8dff987e _dispatch_source_latch_and_call + 721 12 libdispatch.dylib 0x00007fff8dff262b _dispatch_source_invoke + 412 13 libdispatch.dylib 0x00007fff8dff2154 _dispatch_queue_drain + 571 14 libdispatch.dylib 0x00007fff8dff3ecc _dispatch_queue_invoke + 202 15 libdispatch.dylib 0x00007fff8dff16b7 _dispatch_root_queue_drain + 463 16 libdispatch.dylib 0x00007fff8dffffe4 _dispatch_worker_thread3 + 91 17 libsystem_pthread.dylib 0x00007fff994bb6cb _pthread_wqthread + 729 18 libsystem_pthread.dylib 0x00007fff994b94a1 start_wqthread + 13

Thread 0 crashed with X86 Thread State (64-bit): rax: 0x00007fff55e7c488 rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000109dc2a2a rdi: 0x0000000000000000 rsi: 0x0000000000000009 rbp: 0x00007fff55e7c3b0 rsp: 0x00007fff55e7c3a0 r8: 0x0000000000000300 r9: 0xbaddc0dedeadbead r10: 0x00007fac2a8631b0 r11: 0x0000000000000001 r12: 0x00006080000f4010 r13: 0x00000000000f42a7 r14: 0x00007fff7b254780 r15: 0x0000000109de1ef0 rip: 0x00007fff99b06a79 rfl: 0x0000000000010246 cr2: 0x0000000000000000

Logical CPU: 0 Error Code: 0x00000004 Trap Number: 14

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0x7fff97511fff com.apple.ink.framework (10.9 - 213) <8E029630-1530-3734-A446-13353F0E7AC5> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Ink.framework/Versions/A/Ink 0x7fff97564000 - 0x7fff97584fff com.apple.IconServices (47.1 - 47.1) /System/Library/PrivateFrameworks/IconServices.framework/Versions/A/IconServices 0x7fff977a4000 - 0x7fff97896fff libxml2.2.dylib (26) /usr/lib/libxml2.2.dylib 0x7fff97897000 - 0x7fff97899ff7 libquarantine.dylib (76) /usr/lib/system/libquarantine.dylib 0x7fff9789a000 - 0x7fff97970ff3 com.apple.DiskImagesFramework (10.10 - 389.1) <7DE2208C-BD55-390A-8167-4F9F11750C4B> /System/Library/PrivateFrameworks/DiskImages.framework/Versions/A/DiskImages 0x7fff97971000 - 0x7fff97973fff com.apple.loginsupport (1.0 - 1) <35A2A071-606C-39A5-8C11-E4CAF98D934C> /System/Library/PrivateFrameworks/login.framework/Versions/A/Frameworks/loginsupport.framework/Versions/A/loginsupport 0x7fff97b8e000 - 0x7fff97b8eff7 libunc.dylib (29) <5676F7EA-C1DF-329F-B006-D2C3022B7D70> /usr/lib/system/libunc.dylib 0x7fff97b8f000 - 0x7fff97d74267 libobjc.A.dylib (646) <3B60CD90-74A2-3A5D-9686-B0772159792A> /usr/lib/libobjc.A.dylib 0x7fff97e21000 - 0x7fff97e21fff com.apple.CoreServices (62 - 62) <9E4577CA-3FC3-300D-AB00-87ADBDDA2E37> /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices 0x7fff980bb000 - 0x7fff98138fff com.apple.CoreServices.OSServices (640.3 - 640.3) <28445162-08E9-3E24-84E4-617CE5FE1367> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices 0x7fff98139000 - 0x7fff98187fff libcurl.4.dylib (83.1.2) <337A1FF8-E8B1-3173-9F29-C0D4C851D8E1> /usr/lib/libcurl.4.dylib 0x7fff9820d000 - 0x7fff98210ff7 libdyld.dylib (353.2.1) <19FAF435-C165-3374-9DEF-D7BBA7D61DB6> /usr/lib/system/libdyld.dylib 0x7fff98211000 - 0x7fff98211fff com.apple.audio.units.AudioUnit (1.12 - 1.12) <76EF1C9D-DEA4-3E55-A134-4099B2FD2CF2> /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit 0x7fff98213000 - 0x7fff9821fff7 com.apple.OpenDirectory (10.10 - 187) <1D0066FC-1DEB-381B-B15C-4C009E0DF850> /System/Library/Frameworks/OpenDirectory.framework/Versions/A/OpenDirectory 0x7fff98220000 - 0x7fff98222ffb libCGXType.A.dylib (772) <7CB71BC6-D8EC-37BC-8243-41BAB086FAAA> /System/Library/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCGXType.A.dylib 0x7fff98305000 - 0x7fff9830affb libheimdal-asn1.dylib (398.1.2) /usr/lib/libheimdal-asn1.dylib 0x7fff984f6000 - 0x7fff984ffff7 libsystem_notify.dylib (133.1.1) <61147800-F320-3DAA-850C-BADF33855F29> /usr/lib/system/libsystem_notify.dylib 0x7fff98500000 - 0x7fff98500fff com.apple.ApplicationServices (48 - 48) <5BF7910B-C328-3BF8-BA4F-CE52B574CE01> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices 0x7fff98501000 - 0x7fff987adfff com.apple.GeoServices (1.0 - 982.4.10) <8A7FE04A-2785-30E7-A6E2-DC15D170DAF5> /System/Library/PrivateFrameworks/GeoServices.framework/Versions/A/GeoServices 0x7fff987ae000 - 0x7fff987bfff7 libz.1.dylib (55) <88C7C7DE-04B8-316F-8B74-ACD9F3DE1AA1> /usr/lib/libz.1.dylib 0x7fff9887c000 - 0x7fff98885ff3 com.apple.CommonAuth (4.0 - 2.0) /System/Library/PrivateFrameworks/CommonAuth.framework/Versions/A/CommonAuth 0x7fff988b9000 - 0x7fff988bafff libDiagnosticMessagesClient.dylib (100) <2EE8E436-5CDC-34C5-9959-5BA218D507FB> /usr/lib/libDiagnosticMessagesClient.dylib 0x7fff988bb000 - 0x7fff988f6fff com.apple.QD (301 - 301) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/QD.framework/Versions/A/QD 0x7fff988f7000 - 0x7fff98983fff libsystem_c.dylib (1044.1.2) /usr/lib/system/libsystem_c.dylib 0x7fff99363000 - 0x7fff99393fff libsystem_m.dylib (3086.1) <1E12AB45-6D96-36D0-A226-F24D9FB0D9D6> /usr/lib/system/libsystem_m.dylib 0x7fff99394000 - 0x7fff993b5fff com.apple.framework.Apple80211 (10.0.1 - 1001.57.4) /System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Apple80211 0x7fff993b6000 - 0x7fff99479ff7 libvMisc.dylib (512) /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvMisc.dylib 0x7fff994b8000 - 0x7fff994c1fff libsystem_pthread.dylib (105.1.4) <26B1897F-0CD3-30F3-B55A-37CB45062D73> /usr/lib/system/libsystem_pthread.dylib 0x7fff995db000 - 0x7fff99606fff com.apple.DictionaryServices (1.2 - 229) <6789EC43-CADA-394D-8FE8-FC3A2DD136B9> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices 0x7fff99607000 - 0x7fff9960bfff libsystem_stats.dylib (163.1.4) <1DB04436-5974-3F16-86CC-5FF5F390339C> /usr/lib/system/libsystem_stats.dylib 0x7fff9963b000 - 0x7fff99655ff3 com.apple.Ubiquity (1.3 - 313) /System/Library/PrivateFrameworks/Ubiquity.framework/Versions/A/Ubiquity 0x7fff99656000 - 0x7fff9965bff7 libmacho.dylib (862) <126CA2ED-DE91-308F-8881-B9DAEC3C63B6> /usr/lib/system/libmacho.dylib 0x7fff9965c000 - 0x7fff9968cffb com.apple.GSS (4.0 - 2.0) /System/Library/Frameworks/GSS.framework/Versions/A/GSS 0x7fff9968d000 - 0x7fff996aafff libsystem_kernel.dylib (2782.1.97) <93E0E0A9-75B6-3904-BB4E-4BC7C05F4B6B> /usr/lib/system/libsystem_kernel.dylib 0x7fff996ab000 - 0x7fff996c1ff7 libsystem_asl.dylib (267) /usr/lib/system/libsystem_asl.dylib 0x7fff996c2000 - 0x7fff9992affb com.apple.security (7.0 - 57031.1.35) <96141D1F-614E-32C4-8AC2-F47481F23F43> /System/Library/Frameworks/Security.framework/Versions/A/Security 0x7fff9992b000 - 0x7fff9993eff7 com.apple.CoreBluetooth (1.0 - 1) /System/Library/Frameworks/CoreBluetooth.framework/Versions/A/CoreBluetooth 0x7fff99947000 - 0x7fff99957ff7 libbsm.0.dylib (34) /usr/lib/libbsm.0.dylib 0x7fff99958000 - 0x7fff99963ff7 libkxld.dylib (2782.1.97) /usr/lib/system/libkxld.dylib 0x7fff9996a000 - 0x7fff99a82ffb com.apple.CoreText (352.0 - 454.1) /System/Library/Frameworks/CoreText.framework/Versions/A/CoreText 0x7fff99a83000 - 0x7fff99ac4fff libGLU.dylib (11.0.7) <8037342E-1ECD-385F-B4C3-545CE97B76AE> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLU.dylib 0x7fff99ac5000 - 0x7fff99adfff7 libextension.dylib (55.1) /usr/lib/libextension.dylib 0x7fff99ae0000 - 0x7fff99e76fff com.apple.CoreFoundation (6.9 - 1151.16) /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation 0x7fff99e77000 - 0x7fff99ec4ff3 com.apple.print.framework.PrintCore (10.0 - 451) <3CA58254-D14F-3913-9DFB-CAC499570CC7> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/PrintCore.framework/Versions/A/PrintCore 0x7fff99f2d000 - 0x7fff99f35fff libsystem_dnssd.dylib (561.1.1) <62B70ECA-E40D-3C63-896E-7F00EC386DDB> /usr/lib/system/libsystem_dnssd.dylib 0x7fff99f36000 - 0x7fff99fd4fff com.apple.Metadata (10.7.0 - 916.1) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata 0x7fff99fd5000 - 0x7fff9a026ff7 com.apple.audio.CoreAudio (4.3.0 - 4.3.0) /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio 0x7fff9a027000 - 0x7fff9a081ff7 com.apple.LanguageModeling (1.0 - 1) /System/Library/PrivateFrameworks/LanguageModeling.framework/Versions/A/LanguageModeling 0x7fff9a085000 - 0x7fff9a0a1ff7 libsystem_malloc.dylib (53.1.1) <19BCC257-5717-3502-A71F-95D65AFA861B> /usr/lib/system/libsystem_malloc.dylib 0x7fff9a0a2000 - 0x7fff9a0a6fff libcache.dylib (69) <45E9A2E7-99C4-36B2-BEE3-0C4E11614AD1> /usr/lib/system/libcache.dylib 0x7fff9a0a7000 - 0x7fff9a0abff7 com.apple.TCC (1.0 - 1) /System/Library/PrivateFrameworks/TCC.framework/Versions/A/TCC 0x7fff9a0ac000 - 0x7fff9a0aefff libsystem_configuration.dylib (699.1.5) <9FBA1CE4-97D0-347E-A443-93ED94512E92> /usr/lib/system/libsystem_configuration.dylib 0x7fff9a331000 - 0x7fff9a357ff7 com.apple.ChunkingLibrary (2.1 - 163.1) <3514F2A4-38BD-3849-9286-B3B991057742> /System/Library/PrivateFrameworks/ChunkingLibrary.framework/Versions/A/ChunkingLibrary 0x7fff9a44c000 - 0x7fff9a52ffff libcrypto.0.9.8.dylib (52) <7208EEE2-C090-383E-AADD-7E1BD1321BEC> /usr/lib/libcrypto.0.9.8.dylib

External Modification Summary: Calls made by other processes targeting this process: task_for_pid: 1 thread_create: 0 thread_set_state: 0 Calls made by this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by all processes on this machine: task_for_pid: 268665 thread_create: 0 thread_set_state: 3778

VM Region Summary: ReadOnly portion of Libraries: Total=182.7M resident=111.2M(61%) swapped_out_or_unallocated=71.5M(39%) Writable regions: Total=140.0M written=65.9M(47%) resident=71.5M(51%) swapped_out=8K(0%) unallocated=68.5M(49%)

REGION TYPE VIRTUAL =========== ======= CG backing stores 968K CG image 24K CG shared images 240K CoreAnimation 20K CoreImage 8K CoreUI image data 60K Foundation 4K Kernel Alloc Once 8K MALLOC 112.0M MALLOC (admin) 32K Memory Tag 242 12K Memory Tag 251 8K OpenCL 16K STACK GUARD 56.0M Stack 9824K VM_ALLOCATE 17.1M DATA 15.5M IMAGE 528K LINKEDIT 70.5M TEXT 112.2M __UNICODE 544K mapped file 61.1M shared memory 4K =========== ======= TOTAL 456.4M

[samdmarshall]

Does this sample contain the changes that resolved the other issue? I want to make sure that I'm not working from an older version of the code.

[daemonx01]

No, here's the new sample with latest version of library.

https://www.dropbox.com/s/l63xtpgfxfxf5dn/SDMMobileDevice%20SAMPLE%202.zip?dl=0

[daemonx01]

And here's the new crash log from latest library.

https://gist.github.com/bilawal230/5ddd27a2c0fd62d504ff

[daemonx01]

While reading a large file, say 500mb, if you detach the device app will crash. It happens whenever in the reading process.

[daemonx01]

can you look into it this weekend?

[samdmarshall]

Can you please try again with the latest commit? I haven't been able to reproduce since adding those fixes.

[daemonx01]

Yes, it's fixed now after added checks. Thanks a lot

[kapil0408]

Hi All,

Could you please share the code. i want to see the reading process using it. Please help.

Thanks.