VM Region Info: 0 is not in any region. UNUSED SPACE AT START TEXT 10

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Created Jan ’23

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Please help to understand the crash better. I am keep getting this and is on Ipads only, iphones work just fine.

Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000 Exception Codes: 0x0000000000000001, 0x0000000000000000 VM Region Info: 0 is not in any region. Bytes before following region: 4390486016 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL UNUSED SPACE AT START --->
__TEXT 105b18000-10653c000 [ 10.1M] r-x/r-x SM=COW ...pp/mediproapp Termination Reason: SIGNAL 11 Segmentation fault: 11 Terminating Process: exc handler [2608]

Triggered by Thread: 0

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_platform.dylib 0x10ee0f0ad _platform_memmove$VARIANT$Haswell + 141 1 mediproapp 0x106422d92 addVertex + 98 (PPSSignatureView.m:40) 2 mediproapp 0x1064232f5 -[PPSSignatureView pan:] + 1077 (PPSSignatureView.m:416) 3 UIKitCore 0x1218a4e57 -[UIGestureRecognizerTarget _sendActionWithGestureRecognizer:] + 49 4 UIKitCore 0x1218aefb1 _UIGestureRecognizerSendTargetActions + 100 5 UIKitCore 0x1218abb1d _UIGestureRecognizerSendActions + 294 6 UIKitCore 0x1218aae59 -[UIGestureRecognizer _updateGestureForActiveEvents] + 725 7 UIKitCore 0x12189d0db _UIGestureEnvironmentUpdate + 2713 8 CoreFoundation 0x109f1ec67 CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION + 23 9 CoreFoundation 0x109f1948c __CFRunLoopDoObservers + 541 10 CoreFoundation 0x109f19a3c __CFRunLoopRun + 1126 11 CoreFoundation 0x109f190f3 CFRunLoopRunSpecific + 567 12 GraphicsServices 0x110cb6cd3 GSEventRunModal + 139 13 UIKitCore 0x121dd0f42 -[UIApplication _run] + 928 14 UIKitCore 0x121dd5b5e UIApplicationMain + 101 15 mediproapp 0x105b1dc08 main + 104 (main.m:7) 16 dyld_sim 0x108b6dee9 start_sim + 10 17 dyld 0x109dad310 start + 2432

Thread 1: 0 libsystem_pthread.dylib 0x10ed91c58 start_wqthread + 0

Thread 2:: com.apple.uikit.eventfetch-thread 0 libsystem_kernel.dylib 0x10ef215c2 mach_msg2_trap + 10 1 libsystem_kernel.dylib 0x10ef2f604 mach_msg2_internal + 82 2 libsystem_kernel.dylib 0x10ef28635 mach_msg_overwrite + 723 3 libsystem_kernel.dylib 0x10ef218a8 mach_msg + 19 4 CoreFoundation 0x109f1f440 __CFRunLoopServiceMachPort + 319 5 CoreFoundation 0x109f19ae3 __CFRunLoopRun + 1293 6 CoreFoundation 0x109f190f3 CFRunLoopRunSpecific + 567 7 Foundation 0x10ab9a754 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 213 8 Foundation 0x10ab9a9cb -[NSRunLoop(NSRunLoop) runUntilDate:] + 72 9 UIKitCore 0x121e912d1 -[UIEventFetcher threadMain] + 491 10 Foundation 0x10abc3550 NSThread__start + 1025 11 libsystem_pthread.dylib 0x10ed96259 _pthread_start + 125 12 libsystem_pthread.dylib 0x10ed91c7b thread_start + 15

Logical CPU: 4 Error Code: 0x00000006 (no mapping for user data write) Trap Number: 14

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Answer 1

chris2kus31 OP

Jan ’23

Crash Report

crashReport.txt

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Answer 2

DTS Engineer OP

Apple

Jan ’23

Consider this:

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

Your app has crashed trying to access invalid memory. The invalid address is 0, that is, nil / NULL / nullptr.

Now look at the crashing thread backtrace:

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   libsystem_platform.dylib … _platform_memmove$VARIANT$Haswell + 141
1   mediproapp               … addVertex + 98 (PPSSignatureView.m:40)
2   mediproapp               … -[PPSSignatureView pan:] + 1077 (PPSSignatureView.m:416)
3   UIKitCore                … -[UIGestureRecognizerTarget _sendActionWithGestureRecognizer:] + 49

Frame 3 shows that UIKit is calling your gesture recogniser. Frames 2 and 1 are you code. Frame 0 is the implementation of memmove. Something in your code is calling memmove with either a source or destination address of nil. To investigate further, look at the code indicated by frame 1, that is, line 416 of PPSSignatureView.m.

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