问题描述
在更新到iOS 13.x/iPadOS 13.x之后，我们在最近的Testflight版本中看到了偶发的崩溃.我们尚未看到来自使用13之前发行版的用户的报告，但似乎尚未更新到13，因此我们真的不知道.
After updating to iOS 13.x / iPadOS 13.x we see sporadic crashes with our recent Testflight builds. We've not seen reports from users using our pre-13 released version yet, but it seems not many have updated to 13 yet, so we really don't know.
该应用程序是使用WkWebView的cordova-ios 5.0.2的cordova应用程序.数据保护权利已设置为完整.
The app is a cordova-app with cordova-ios 5.0.2 using WkWebView. Data protection entitlement is set to full.
我很难理解崩溃的原因，它似乎在iOS堆栈的深处?崩溃是偶发性的，并且似乎仅在应用程序进入后台后才会偶尔发生.
I have a hard time making sense of the crash, and it seems to be somewhere deep in the iOS-stack? The crash is sporadic and seems only to happen occasionally when the app has been put into the background.
我正在寻找有关如何深入浅出的指南/指针.
TestFlight的崩溃报告:
Crash report from TestFlight:
Incident Identifier: 900F9C19-EE4A-4A9D-B1AB-E834F6387565
Beta Identifier: 7194E7C0-152C-43E4-9716-BE2AF29A0BD7
Hardware Model: iPad7,5
Process: SomeApp [677]
Path: /private/var/containers/Bundle/Application/745F3054-AB4B-4A1A-A7AB-2AFD0516706C/SomeApp.app/SomeApp
Identifier: SomeApp
Version: 380 (2.0.0)
AppStoreTools: 11A1002b
Beta: YES
Code Type: ARM-64 (Native)
Role: Non UI
Parent Process: launchd [1]
Coalition: SomeApp [620]
Date/Time: 2019-10-03 07:10:10.2716 +0200
Launch Time: 2019-10-02 15:50:25.8963 +0200
OS Version: iPhone OS 13.1.2 (17A860)
Release Type: User
Baseband Version: n/a
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Subtype: KERN_MEMORY_ERROR at 0x00000001048a5c8c
VM Region Info: 0x1048a5c8c is in 0x104884000-0x1048a8000; bytes after start: 138380 bytes before end: 9075
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
MALLOC_LARGE 0000000104880000-0000000104884000 [ 16K] rw-/rwx SM=PRV
---> mapped file 0000000104884000-00000001048a8000 [ 144K] r--/rw- SM=COW ...t_id=18017271
shared memory 00000001048a8000-00000001048ac000 [ 16K] r--/r-- SM=SHM
Termination Signal: Bus error: 10
Termination Reason: Namespace SIGNAL, Code 0xa
Terminating Process: exc handler [677]
Triggered by Thread: 12
Thread 12 name:
Thread 12 Crashed:
0 libdyld.dylib 0x000000018a2f76c0 dyld3::closure::ObjCStringTable::hash(char const*, unsigned long) const + 16 (Closure.cpp:1339)
1 libdyld.dylib 0x000000018a2f7cd4 dyld3::closure::ObjCStringTable::getIndex(char const*) const + 52 (Closure.h:840)
2 libdyld.dylib 0x000000018a2f7a6c dyld3::closure::ObjCStringTable::getPotentialTarget(char const*) const + 20 (Closure.h:824)
3 libdyld.dylib 0x000000018a2f7d40 dyld3::closure::ObjCClassDuplicatesOpt::getClassLocation(char const*, objc_opt::objc_opt_t const*... + 44 (Closure.cpp:1483)
4 libdyld.dylib 0x000000018a3044bc dyld3::AllImages::forEachObjCClass(char const*, void (void*, bool, bool*) block_pointer) const + 72 (AllImages.cpp:1915)
5 libobjc.A.dylib 0x000000018a236c38 getPreoptimizedClass + 148 (objc-opt.mm:279)
6 libobjc.A.dylib 0x000000018a2218d8 getClassExceptSomeSwift(char const*) + 20 (objc-runtime-new.mm:1607)
7 libobjc.A.dylib 0x000000018a222784 look_up_class + 100 (objc-runtime-new.mm:6843)
8 Foundation 0x000000018a8b4b00 NSClassFromString + 200 (NSObjCRuntime.m:0)
9 BoardServices 0x000000018f2ba1b0 +[BSXPCServiceConnectionProxy invokeMethod:onTarget:withMessage:forConnection:] + 104 (BSXPCServiceConnectionProxy.m:329)
10 BoardServices 0x000000018f2b9374 -[BSXPCServiceConnectionProxy invokeMessage:onTarget:] + 144 (BSXPCServiceConnectionProxy.m:177)
11 BoardServices 0x000000018f2c080c __63-[BSXPCServiceConnectionEventHandler connection:handleMessage:]_block_invoke + 428 (BSXPCServiceConnectionEventHandler.m:184)
12 BoardServices 0x000000018f2d6bf0 BSXPCServiceConnectionExecuteCallOut + 344 (BSXPCServiceConnection.m:1049)
13 BoardServices 0x000000018f2c062c -[BSXPCServiceConnectionEventHandler connection:handleMessage:] + 172 (BSXPCServiceConnectionEventHandler.m:173)
14 BoardServices 0x000000018f2d53e4 -[BSXPCServiceConnection _connection_handleMessage:fromPeer:withHandoff:] + 644 (BSXPCServiceConnection.m:808)
15 libdispatch.dylib 0x000000018a1bf610 _dispatch_call_block_and_release + 24 (init.c:1408)
16 libdispatch.dylib 0x000000018a1c0184 _dispatch_client_callout + 16 (object.m:495)
17 libdispatch.dylib 0x000000018a16c464 _dispatch_lane_serial_drain$VARIANT$mp + 608 (inline_internal.h:2487)
18 libdispatch.dylib 0x000000018a16ce88 _dispatch_lane_invoke$VARIANT$mp + 468 (queue.c:3820)
19 libdispatch.dylib 0x000000018a16c330 _dispatch_lane_serial_drain$VARIANT$mp + 300 (inline_internal.h:2528)
20 libdispatch.dylib 0x000000018a16ce88 _dispatch_lane_invoke$VARIANT$mp + 468 (queue.c:3820)
21 libdispatch.dylib 0x000000018a176340 _dispatch_workloop_worker_thread + 588 (queue.c:6386)
22 libsystem_pthread.dylib 0x000000018a20ffa4 _pthread_wqthread + 276 (pthread.c:2323)
23 libsystem_pthread.dylib 0x000000018a212ae0 start_wqthread + 8
更新到iPadOS 13.2后的堆栈，注意:PluginKit:
Stack after update to iPadOS 13.2, of note: PluginKit:
Thread 5 name:
Thread 5 Crashed:
0 libdyld.dylib 0x00000001bc5505d0 dyld3::closure::ObjCStringTable::hash(char const*, unsigned long) const + 16 (Closure.cpp:1339)
1 libdyld.dylib 0x00000001bc550be4 dyld3::closure::ObjCStringTable::getIndex(char const*) const + 52 (Closure.h:841)
2 libdyld.dylib 0x00000001bc55097c dyld3::closure::ObjCStringTable::getPotentialTarget(char const*) const + 20 (Closure.h:825)
3 libdyld.dylib 0x00000001bc550c50 dyld3::closure::ObjCClassDuplicatesOpt::getClassLocation(char const*, objc_opt::objc_opt_t const*... + 44 (Closure.cpp:1483)
4 libdyld.dylib 0x00000001bc55d3cc dyld3::AllImages::forEachObjCClass(char const*, void (void*, bool, bool*) block_pointer) const + 72 (AllImages.cpp:1915)
5 libobjc.A.dylib 0x00000001bc48fc28 getPreoptimizedClass + 148 (objc-opt.mm:279)
6 libobjc.A.dylib 0x00000001bc47a7d8 getClassExceptSomeSwift(char const*) + 20 (objc-runtime-new.mm:1620)
7 libobjc.A.dylib 0x00000001bc47b684 look_up_class + 100 (objc-runtime-new.mm:6880)
8 BaseBoard 0x00000001bf30447c _BSXPCEncodeObjectForKey + 124 (BSXPCCoder.m:377)
9 BaseBoard 0x00000001bf30428c -[BSXPCCoder encodeObject:forKey:] + 96 (BSXPCCoder.m:181)
10 RunningBoardServices 0x00000001bf29f604 __44+[RBSXPCMessage messageForMethod:arguments:]_block_invoke + 288 (RBSXPCUtilities.m:152)
11 RunningBoardServices 0x00000001bf29f35c +[RBSXPCMessage messageWithEncoder:] + 72 (RBSXPCUtilities.m:132)
12 RunningBoardServices 0x00000001bf29f408 +[RBSXPCMessage messageForMethod:arguments:] + 148 (RBSXPCUtilities.m:140)
13 RunningBoardServices 0x00000001bf29f788 +[RBSXPCMessage messageForMethod:varguments:] + 192 (RBSXPCUtilities.m:170)
14 RunningBoardServices 0x00000001bf28f234 -[RBSConnection _invalidateAssertionIdentifier:error:] + 144 (RBSConnection.m:1361)
15 RunningBoardServices 0x00000001bf28808c -[RBSConnection invalidateAssertion:error:] + 80 (RBSConnection.m:275)
16 RunningBoardServices 0x00000001bf28605c -[RBSAssertion _clientInvalidateWithError:] + 124 (RBSAssertion.m:317)
17 AssertionServices 0x00000001c0e6278c -[BKSAssertion _invalidateSynchronously:] + 104 (BKSAssertion.m:164)
18 AssertionServices 0x00000001c0e6718c -[BKSProcessAssertion invalidate] + 92 (BKSProcessAssertion.m:291)
19 Foundation 0x00000001bcb2e624 ___NSExtensionTearDownRequestWithIdentifier_block_invoke_2 + 84 (NSExtension.m:1098)
20 PlugInKit 0x00000001c9e6db4c -[PKHostPlugIn endUsing:] + 152 (PKHostPlugIn.m:814)
21 Foundation 0x00000001bcb2d090 __64-[NSExtension _safelyEndUsingWithProcessAssertion:continuation:]_block_invoke + 116 (NSExtension.m:1670)
22 libdispatch.dylib 0x00000001bc418610 _dispatch_call_block_and_release + 24 (init.c:1408)
23 libdispatch.dylib 0x00000001bc419184 _dispatch_client_callout + 16 (object.m:495)
24 libdispatch.dylib 0x00000001bc3c5404 _dispatch_lane_serial_drain$VARIANT$mp + 608 (inline_internal.h:2484)
25 libdispatch.dylib 0x00000001bc3c5df8 _dispatch_lane_invoke$VARIANT$mp + 420 (queue.c:3863)
26 libdispatch.dylib 0x00000001bc3cf314 _dispatch_workloop_worker_thread + 588 (queue.c:6445)
27 libsystem_pthread.dylib 0x00000001bc468f98 _pthread_wqthread + 276 (pthread.c:2323)
28 libsystem_pthread.dylib 0x00000001bc46bad4 start_wqthread + 8
对于其他遇到这些问题的人，这里是一些其他相关链接:
For others experiencing these problems here are some other relevant links:
https://forums.developer.apple.com/thread/123728 https://forums.developer.apple.com/message/384064#384064
推荐答案
似乎dyld3将生成的clojure文件保存在app tmp目录中，如果使用NSFileProtectionComplete，则关闭文件也具有此属性.
It seems that the dyld3 saves the generated clojure files in the app tmp directory and if you use NSFileProtectionComplete the closure files have this property too.
要产生崩溃提示，请关闭应用程序，锁定手机，发送将唤醒应用程序的推送，然后生成崩溃.
To generate a crahs close the app, lock the phone, send a push that will wake up the app and then the crash is generated.
解决方案似乎很简单，只需将应用程序tmp direcptry的权限更改为NSFileProtectionCompleteUntilFirstUserAuthentication，应用程序就不会崩溃.我真的不知道苹果为什么要这么做.
The solution seems to be simple, just change the permissions for the app tmp direcptry to NSFileProtectionCompleteUntilFirstUserAuthentication and the app will not crash.I really don't know why apple did this.
这篇关于在iOS13/iPadOS 13中使用dylib调试零星应用崩溃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！