IOS Crash EXC_BAD_ACCESS (SIGSEGV) - ios

Question

Good afternoon colleagues
Recently, I have been receiving reports through the organizer from users of the crash application.
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000010
Exception Codes: 0x0000000000000001, 0x0000000000000010
VM Region Info: 0x10 is not in any region. Bytes before following region: 68719476720
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
commpage (reserved) 1000000000-7000000000 [384.0G] ---/--- SM=NUL ...(unallocated)
Triggered by Thread: 0
Kernel Triage:
VM - pmap_enter retried due to resource shortage
VM - pmap_enter retried due to resource shortage
VM - pmap_enter retried due to resource shortage
VM - pmap_enter retried due to resource shortage
VM - pmap_enter retried due to resource shortage
Thread 0 name:
Thread 0 Crashed:
0 libobjc.A.dylib 0x00000001d30f9c20 objc_msgSend + 32 (:-1)
1 UIKitCore 0x00000001dc192224 -[UIViewController dealloc] + 768 (UIViewController.m:3098)
2 UIKitCore 0x00000001dc18fdf8 -[UINavigationController dealloc] + 308 (UINavigationController.m:774)
3 libobjc.A.dylib 0x00000001d30f95d8 AutoreleasePoolPage::releaseUntil(objc_object**) + 196 (NSObject.mm:938)
4 libobjc.A.dylib 0x00000001d30fcf80 objc_autoreleasePoolPop + 256 (NSObject.mm:1208)
5 UIKitCore 0x00000001dc192340 -[UIViewController dealloc] + 1052 (UIViewController.m:3128)
6 UIKitCore 0x00000001dc18fdf8 -[UINavigationController dealloc] + 308 (UINavigationController.m:774)
7 libobjc.A.dylib 0x00000001d30f95d8 AutoreleasePoolPage::releaseUntil(objc_object**) + 196 (NSObject.mm:938)
8 libobjc.A.dylib 0x00000001d30fcf80 objc_autoreleasePoolPop + 256 (NSObject.mm:1208)
9 CoreFoundation 0x00000001d9e4e764 _CFAutoreleasePoolPop + 32 (NSObject.m:793)
10 CoreFoundation 0x00000001d9e4c4b8 __CFRunLoopPerCalloutARPEnd + 48 (CFRunLoop.c:746)
11 CoreFoundation 0x00000001d9e4c080 __CFRunLoopRun + 2076 (CFRunLoop.c:3149)
12 CoreFoundation 0x00000001d9e50ed4 CFRunLoopRunSpecific + 612 (CFRunLoop.c:3418)
13 GraphicsServices 0x0000000213152368 GSEventRunModal + 164 (GSEvent.c:2196)
14 UIKitCore 0x00000001dc32f3d0 -[UIApplication _run] + 888 (UIApplication.m:3745)
15 UIKitCore 0x00000001dc32f034 UIApplicationMain + 340 (UIApplication.m:5335)
16 AppIOS 0x000000010546defc main + 68 (AppDelegate.swift:21)
17 dyld 0x00000001f84b8960 start + 2528 (dyldMain.cpp:1170)
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x00000001120ac600 x1: 0x00000001d5cacf78 x2: 0x0000000112910400 x3: 0x000000016ae5a268
x4: 0x0000000000000010 x5: 0x0000000111f5d290 x6: 0x0000000000000020 x7: 0x0000000000000000
x8: 0x0000000280568de0 x9: 0x0000000000000000 x10: 0x6ae10001120ac600 x11: 0x000000000000001f
x12: 0x0000000000984000 x13: 0x0000000111f42fe0 x14: 0x0000000000000000 x15: 0x0000000000000000
x16: 0x0000000000000000 x17: 0x0000000235516f30 x18: 0x0000000000000000 x19: 0x0000000112910400
x20: 0x00000001128096c8 x21: 0x0000000280568de0 x22: 0x0000000000000050 x23: 0x00000000000001b8
x24: 0x000000022d863000 x25: 0x0000000100000002 x26: 0x0000000000000050 x27: 0x0000000000000001
x28: 0x0000000283eb1210 fp: 0x000000016ae5a3c0 lr: 0x00000001dc192224
sp: 0x000000016ae5a1a0 pc: 0x00000001d30f9c20 cpsr: 0x20000000
esr: 0x56000080 Address size fault
I can't figure out why the crash is happening.
The rootViewController itself is initialized through the code:
class AppDelegate: UIResponder, UIApplicationDelegate {
//...//
var window: UIWindow?
func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
createRootVC()
}
private func createRootVC() {
self.window = UIWindow(frame: UIScreen.main.bounds)
let mainView = Main_V2()
let navigation = RootNavigationController(rootViewController: mainView)
self.window?.rootViewController = navigation
self.window?.makeKeyAndVisible()
}
//..//
}
In Main_V2, this is a continuation of the Launch Screen, which has a network request and determines which screen will be next on the stack. After opening the next screen, Main_V2 is removed from the viewControllers stack of the root navigation controller.
The error is not reproduced by own efforts. Even with AddressSanitizer and ZombieObject scan enabled.
The application also has a timer restart when the application goes into the background. After 5 minutes, the screens restart:
private func restartApp() {
let mainView = Main_V2()
let navigation = RootNavigationController(rootViewController: mainView)
// Get current Window with RootViewController
guard
let window = UIApplication.shared.keyWindow,
let rootVC = window.rootViewController
else {
createRootVC()
return
}
// Change frame of current root frame
navigation.view.frame = rootVC.view.frame
navigation.view.layoutIfNeeded()
// Clear All
window.rootViewController = nil
// Animate transition new rootViewController
UIView.transition(with: window, duration: 0.2, options: .transitionCrossDissolve) {
window.rootViewController = navigation
}
}
But judging by the report, it's not about the restart, but the first cold start of the application.
There are no dsym files for UIKit in the downloaded Debug Symbols, so it is not possible to check the cause through the %atos -arch arm64 -o command
I would be very grateful if you could tell me what the reason may be or how to investigate this report.