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Philipp Anger
Dec 6, 2016, 11:18:39 AM12/6/16
to Google Mobile Ads SDK Developers
Problem
I've encountered this crash when integrating the Google Mobile Ads SDK into an existing iOS app when requesting the custom native ad content and rendering it within a React Native view.
I'm using React Native already over a year in the App without big issue, but as soon as I try to add the Google Mobile Ads dependency, it sometimes crashes.
The actual weird thing is that it happens after a couple of seconds only on first app install or app update on real devices. Unfortunately it's not 100% reproducible, I'm trying since days already to figure it out, but the only way I could reproduce it 2 out of 3 times was by creating a new build and deploy it on a real device, it only happened once in the Simulator so far. The crash happens independently from the OS version or device version as far as I could tell so far, tested on several devices.
I cannot look into the private framework code and cannot check where and why it's crashing, also I'm no expert on the WebCore. Therefore I would really appreciate some help on how to fix this or what I'm doing wrong.
Crash
WTF::HashMap, WTF::HashTraitsWebCore::ApplicationCacheGroup* >::remove(WTF::String const&)
App Structure
- large existing iOS Swift project
- single React Native view added one year ago
- added Google Mobile Ads Framework to request custom native ads content
- render received custom native ad content within the React Native view
Versions
OS: > iOS 8, Swift 2.3
React Native: 0.36.0
Google Mobile Ads: 7.15.0
OS: > iOS 8, Swift 2.3
React Native: 0.36.0
Google Mobile Ads: 7.15.0
Crash Log
Hardware Model: iPhone8,1
Code Type: ARM-64
Parent Process: ??? [1]
Date/Time: 2016-11-25T11:24:09Z
Launch Time: 2016-11-25T11:24:05Z
OS Version: iPhone OS 9.3.5 (13G36)
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x10
Crashed Thread: 18
Thread 0:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 GraphicsServices 0x0000000183544088 GSEventRunModal + 176
5 UIKit 0x0000000186f4a088 UIApplicationMain + 200
6 MY_APP 0x0000000100056680 main (AppDelegate.swift:15)
7 ??? 0x00000001817fa8b8 0x0 + 0
Thread 1:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 2:
0 libsystem_kernel.dylib 0x00000001819194d8 kevent_qos + 8
1 libdispatch.dylib 0x00000001817cb648 _dispatch_mgr_thread + 48
Thread 3:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 4:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 5:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 6:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 7:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 Foundation 0x000000018266ccfc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
5 Foundation 0x00000001826c2030 -[NSRunLoop(NSRunLoop) run] + 84
6 MY_APP 0x0000000100642438 +[GAI threadMain:] + 60
7 Foundation 0x0000000182753e4c __NSThread__start__ + 996
8 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
9 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
10 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 8:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 9:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 libAVFAudio.dylib 0x00000001883d99e0 GenericRunLoopThread::Entry(void*) + 160
5 libAVFAudio.dylib 0x00000001883ae75c CAPThread::Entry(CAPThread*) + 80
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 10:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 CFNetwork 0x00000001823ddbcc +[NSURLConnection(Loader) _resourceLoadLoop:] + 408
5 Foundation 0x0000000182753e4c __NSThread__start__ + 996
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 11:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 Foundation 0x000000018266ccfc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
5 MY_APP 0x0000000100ab55a4 -[_ABT_SRRunLoopThread main] (SRWebSocket.m:1768)
6 Foundation 0x0000000182753e4c __NSThread__start__ + 996
7 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
8 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
9 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 12:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 13:
0 libsystem_kernel.dylib 0x0000000181918344 __select + 8
1 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
2 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
3 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 14:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 15:
0 libsystem_kernel.dylib 0x000000018191841c __semwait_signal + 8
1 libc++.1.dylib 0x00000001813ad3b4 std::__1::this_thread::sleep_for(std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > const&) + 80
2 JavaScriptCore 0x0000000185982690 bmalloc::Heap::scavenge(std::__1::unique_lock<bmalloc::StaticMutex>&, std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000l> >) + 184
3 JavaScriptCore 0x0000000185982340 bmalloc::Heap::concurrentScavenge() + 80
4 JavaScriptCore 0x0000000185984ad8 bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>::entryPoint() + 96
5 JavaScriptCore 0x0000000185984a68 bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>::pthreadEntryPoint(void*) + 8
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 16:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 17:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 18 Crashed:
0 WebCore 0x0000000185dfe47c WTF::HashMap<WTF::String, WebCore::ApplicationCacheGroup*, WTF::StringHash, WTF::HashTraits<WTF::String>, WTF::HashTraits<WebCore::ApplicationCacheGroup*> >::remove(WTF::String const&) + 48
1 WebCore 0x0000000185dfabbc WebCore::ApplicationCacheStorage::cacheGroupDestroyed(WebCore::ApplicationCacheGroup*) + 48
2 WebCore 0x0000000185df0628 WebCore::ApplicationCacheGroup::~ApplicationCacheGroup() + 52
3 WebCore 0x0000000185df0b10 WebCore::ApplicationCacheGroup::~ApplicationCacheGroup() + 8
4 WebCore 0x0000000185df2334 WebCore::ApplicationCacheGroup::disassociateDocumentLoader(WebCore::DocumentLoader*) + 180
5 WebCore 0x0000000185c824a0 WebCore::ApplicationCacheHost::~ApplicationCacheHost() + 44
6 WebCore 0x0000000185c81ad0 WebCore::DocumentLoader::~DocumentLoader() + 164
7 WebKitLegacy 0x0000000186bf6ba8 WebDocumentLoaderMac::~WebDocumentLoaderMac() + 80
8 WebCore 0x00000001860b0a78 WebCore::FrameLoader::detachFromParent() + 320
9 WebKitLegacy 0x0000000186c60b08 __29-[WebView(WebPrivate) _close]_block_invoke + 344
10 WebCore 0x0000000186a042c4 HandleRunSource(void*) + 364
11 CoreFoundation 0x0000000181d3509c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 20
12 CoreFoundation 0x0000000181d34ab0 __CFRunLoopDoSources0 + 408
13 CoreFoundation 0x0000000181d32830 __CFRunLoopRun + 720
14 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
15 WebCore 0x0000000185c4e108 RunWebThread(void*) + 452
16 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
17 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
18 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 19:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 20:
0 libsystem_kernel.dylib 0x0000000181917f24 __psynch_cvwait + 8
1 libc++.1.dylib 0x000000018136f42c std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 52
2 JavaScriptCore 0x0000000185734d5c JSC::GCThread::waitForNextPhase() + 140
3 JavaScriptCore 0x0000000185734df4 JSC::GCThread::gcThreadMain() + 80
4 JavaScriptCore 0x000000018540a614 WTF::threadEntryPoint(void*) + 208
5 JavaScriptCore 0x000000018540a524 WTF::wtfThreadEntryPoint(void*) + 20
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 21:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 WebCore 0x0000000185c7b950 WebCore::runLoaderThread(void*) + 268
5 JavaScriptCore 0x000000018540a614 WTF::threadEntryPoint(void*) + 208
6 JavaScriptCore 0x000000018540a524 WTF::wtfThreadEntryPoint(void*) + 20
7 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
8 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
9 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 22:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 23:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 CoreFoundation 0x0000000181caa3a4 CFRunLoopRun + 108
5 CoreMotion 0x0000000187c2f41c 0x187bdc000 + 341020
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 24:
0 libsystem_kernel.dylib 0x00000001818fcfd8 mach_msg_trap + 8
1 CoreFoundation 0x0000000181d34c60 __CFRunLoopServiceMachPort + 192
2 CoreFoundation 0x0000000181d32964 __CFRunLoopRun + 1028
3 CoreFoundation 0x0000000181c5cc50 CFRunLoopRunSpecific + 380
4 MY_APP 0x0000000100774904 +[RCTJSCExecutor runRunLoopThread] (RCTJSCExecutor.mm:202)
5 Foundation 0x0000000182753e4c __NSThread__start__ + 996
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 25:
0 libsystem_kernel.dylib 0x0000000181917f24 __psynch_cvwait + 8
1 libc++.1.dylib 0x000000018136f42c std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 52
2 JavaScriptCore 0x0000000185734d5c JSC::GCThread::waitForNextPhase() + 140
3 JavaScriptCore 0x0000000185734df4 JSC::GCThread::gcThreadMain() + 80
4 JavaScriptCore 0x000000018540a614 WTF::threadEntryPoint(void*) + 208
5 JavaScriptCore 0x000000018540a524 WTF::wtfThreadEntryPoint(void*) + 20
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 26:
0 libsystem_kernel.dylib 0x0000000181917f24 __psynch_cvwait + 8
1 JavaScriptCore 0x000000018540db80 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 76
2 WebKitLegacy 0x0000000186c4d4a4 std::__1::unique_ptr<std::__1::function<void ()>, std::__1::default_delete<std::__1::function<void ()> > > WTF::MessageQueue<std::__1::function<void ()> >::waitForMessageFilteredWithTimeout<WTF::MessageQueue<std::__1::function<void ()> >::waitForMessage()::'lambda'(std::__1::function<void ()> const&)>(WTF::MessageQueueWaitResult&, WTF::MessageQueue<std::__1::function<void ()> >::waitForMessage()::'lambda'(std::__1::function<void ()> const&)&&, double) + 84
3 WebKitLegacy 0x0000000186c4cb60 WebCore::StorageThread::threadEntryPoint() + 64
4 JavaScriptCore 0x000000018540a614 WTF::threadEntryPoint(void*) + 208
5 JavaScriptCore 0x000000018540a524 WTF::wtfThreadEntryPoint(void*) + 20
6 libsystem_pthread.dylib 0x00000001819e3b28 _pthread_body + 152
7 libsystem_pthread.dylib 0x00000001819e3a8c _pthread_start + 152
8 libsystem_pthread.dylib 0x00000001819e1028 thread_start + 0
Thread 27:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 28:
0 libsystem_kernel.dylib 0x0000000181918b48 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x00000001819e1020 start_wqthread + 0
Thread 18 crashed with ARM-64 Thread State:
pc: 0x0000000185dfe47c fp: 0x000000016eac1da0 sp: 0x000000016eac1d60 x0: 0x0000000000000000
x1: 0x000000010c2ecf18 x2: 0x000000012ef78e10 x3: 0x0000000000000002 x4: 0x0000000000000001
x5: 0x0000000000000001 x6: 0x000000012eb585c0 x7: 0x0000000000000c30 x8: 0x0000000000000000
x9: 0x0000000000000000 x10: 0x0000000000000000 x11: 0x0000000000000000 x12: 0x0000000000000007
x13: 0x0000000000000000 x14: 0x0000000000000000 x15: 0x000000001fb31e71 x16: 0x0000000181944168
x17: 0x00000001813fea74 x18: 0x0000000000000000 x19: 0x0000000109e48148 x20: 0x000000010c2ecf18
x21: 0x0000000108f34b80 x22: 0x0000000000000007 x23: 0x000000019faed000 x24: 0x0000000000000001
x25: 0x000000012eaf7ee8 x26: 0x00000001a0797002 x27: 0x000000019f7aa5e4 x28: 0x0000000000000000
lr: 0x0000000185dfabbc cpsr: 0x0000000060000000Example App
Unfortunately I couldn't reproduce the crash with the example app so far, but the example app reflects perfectly fine (and of course fully simplified) the app structure and how the Google Mobile Ads SDK is integrated. You can find the example app in this repository: ReactNativeVSGoogleMobileAds
Veer Arjun Busani(Mobile Ads SDK Team)
Dec 6, 2016, 11:52:00 AM12/6/16
to Google Mobile Ads SDK Developers
Hi Philip,
This is a known issue and thank you for the stack trace. Can you record a Charles session and send us these logs when you are able to reproduce the issue?
Thanks,
Arjun Busani
Mobile Ads SDK Team
Philipp Anger
Dec 7, 2016, 1:28:41 AM12/7/16
to Google Mobile Ads SDK Developers
Hi Arjun,
thank you for the quick response. Yes of course, I'll try to reproduce it today and will append the Charles session recording to this issue.
As it's a known issue, is there anything I can do to make it work or should I wait for an update of the SDK?
Regards,
Philipp
Philipp Anger
Dec 7, 2016, 5:08:49 AM12/7/16
to Google Mobile Ads SDK Developers
I've tried the past 3 hours to reproduce the issue and record it with Charles...without success.
Veer Arjun Busani(Mobile Ads SDK Team)
Dec 7, 2016, 10:22:13 AM12/7/16
to Google Mobile Ads SDK Developers
Hi Philip,
At this time, we suspect that these crashes are only limited to Native Ads and we are still trying to fix it. Can you confirm whether this is still happening? The fix would most likely be a server side one for now.
Thanks,
Arjun Busani
Mobile Ads SDK Team
Philipp Anger
Dec 9, 2016, 3:14:08 AM12/9/16
to Google Mobile Ads SDK Developers
Hi Arjun,
I've been trying to reproduce the crash the past days but it seems as if the crash doesn't happen any longer. Only a week ago it was not reproducible in debug mode but happened "randomly" - still way too often - on other devs/testers devices. Therefore I can confirm that it didn't happen to me (and a couple of other devs) the past days, but I'm not certain that the crash is completely gone. Do you know if you've changed something in your production code the last week that could have resolved this issue?
If I can't do anything on our side to fix this issue, I would kindly ask you to let me know when you're certain that the issue got resolved.
Until then I don't want to risk shipping a potential crash cause with the next app update including native ads to our 80 million users.
Thanks for your support!
Regards,
Philipp
Veer Arjun Busani(Mobile Ads SDK Team)
Dec 9, 2016, 9:56:36 AM12/9/16
to google-adm...@googlegroups.com
Hi Philipp,
There was a server side fix that went out about a week ago but we are still monitoring the issue. So do let us know if you were again able to reproduce the issue and share any Crashlytics logs that you may have as well.
Thanks,
Arjun Busani
Mobile Ads SDK Team
Mobile Ads SDK Team
Philipp Anger
Dec 9, 2016, 12:24:06 PM12/9/16
to Google Mobile Ads SDK Developers
Hi Arjun,
Regards,
Philipp
Philipp Anger
Dec 13, 2016, 3:41:45 AM12/13/16
to Google Mobile Ads SDK Developers
Hi Arjun,
We've tried to reproduce the crash again a lot yesterday and today, but we couldn't. Therefore I can confirm that your server side bugfix worked.
Thanks again for the support and the fix!
Regards,
Philipp
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