I'm trying to diagnose my app with Address Sanitizer.
Although the app runs quite smoothly and I only wanted to get further checks regarding the memory alloc etc. I get the following error when I run the app.
It's my first time using Address Sanitizer but as far as I concerened it needs to point out to one of the developer's line of code.
It seems to me like it crashes at internal libary.
Any ideas or suggestions?
Apparently the problem was that I tried to run the game on an iPad with iOS8.0.
On iOS >= 9.0 it works fine.
Related
After working just fine on both iPhone and iPad for a month, my Xcode 9 app has consistently started crashing causing me the following fatal problem: When I build & run it on an iPhone (simulator or device) Xcode completes loading the app and then crashes too fast for me to copy/paste the error from the debugger. When I run on iPad it works fine leading me to believe this is a result of something related to the split master/detail view.
If I use either an exception breakpoint or an "all C++ exceptions" it will stop at the AppDelegate class and crash if I hit play. If I use only an "all Objective-C exceptions" it will crash as before.
In the debug view hierarchy I get the following errors as well:
Error: Unable to capture view hierarchy.
Details: Log Title: Data source expression execution failure.
Log Details: error evaluating expression “(id)
[[(Class)objc_getClass("DBGTargetHub") sharedHub]
performRequestWithRequestInBase64:#"...
Log Method: -[DBGDataSourceConnectionLibViewDebugger
_executeLLDBExpression:forRequest:onPotentialThread:iteration:]
_block_invoke_2
Method: -[DBGViewDebugger updateDebugHierarchy]_block_invoke_2
I have tested other apps and this issue is unique to the app I am working on. Any ideas or debugging tips for how to proceed? I might just have to redo this whole project again if I can't even find the root cause of this! Appreciate any help.
Quick solution: Reset Simulator Device
I managed to resolve the above issue thanks to some serious digging. First, to resolve the instantaneous crash problem, I set a breakpoint at every line in the app delegate. That allowed me to narrow the error to a memory handling problem. From there I started running the code on one of each device available, and realized the crash only occurred on devices I had used earlier in development. Resetting those devices solved the problem.
The core issue here is that when you clean/rebuild your xcode program, it updates the app code on the device, but not necessarily the data model information. So when I changed my data model by including new data and renaming old data it was not properly updated.
Many crashes happened below the iOS9.3 (which means devices with iOS10 are OK)..
The crash logs seem to show that it's not a problem about API that can only be used below iOS 9.3 .
But I have no idea about the crash logs. ( I'm sorry ...for I just start to study iOS development for only 2 month )
Could you please help me analyze the crash logs ?
Really Thanks !
crash log 1
crash log 2
AXE_BAD_ACCESS - this is problem with memory. One of function tried to use variable which already released. I think you need to check use your TableView and cells for this table.
Also to find problem with memory you can try to use zombies
Used to have the similar strange crashes in my app. And only in production, when testing from TestFlight. Building on device with ios 9 caused no problems.
Maybe it sounds strange, but try to convert all images you use in app to images with included sRGB color profile. For me it helped.
I'm getting a really weird EXC_BAD_ACCESS(Code=EXC_ARM_DA_ALIGN) crash on my app which is written in swift but only when i run it on a 32 bit device and only if its running from Xcode (the device is still hooked to Xcode), If i start the app without Xcode it runs fine. I can't give any code since no matter what i do i get no stack trace or anything like that .Only the mention error on the AppDelegate, even though the crash is in different screens further in the app (crashes on second screen).
Any idea as to why the crash would happen only when Xcode is running the app
You are using some variable or object which is yet to be initialised. Please review your code and you will get the error. You can add exceptional break point to get the actual position of the error.
It's a memory alignment issue. Search on EXC_ARM_DA_ALIGN.
https://brewx.qualcomm.com/bws/content/gi/common/appseng/en/knowledgebase/docs/kb95.html
use memcpy
char*Code; int pc;
double f;
memcpy(Code+pc, &f, sizeof(f)); // instead of *(double*)(Code+pc)=f; that generates EXC_ARM_DA_ALIGN
This is driving me crazy...
I have been using Google Maps SDK for iOS for a while (even in an App Store product).
Now, I cannot make it run in the iOS simulator any longer! It doesn't matter which project I try to run (even the sample code from the SDK), it will always crash the first time a map is added, e.g.:
self.view = [GMSMapView mapWithFrame: frame camera: camera];
This is the log messages I get:
2013-05-16 10:59:01.047 SDKDemos[939:1303] ADDRESPONSE - ADDING TO MEMORY ONLY: http://dl.google.com/geosdk/latest
2013-05-16 10:59:01.050 SDKDemos[939:1b03] Google Maps SDK for iOS version: 1.2.2.3031
2013-05-16 10:59:01.050 SDKDemos[939:1b03] New version of Google Maps SDK for iOS available: 1.3.0.3430
2013-05-16 10:59:01.111 SDKDemos[939:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
I have lately tried an antivirus SW on this mac, so one theory is that it may have blocked some vital Google Maps data from downloading. Now, I have uninstalled this anti-virus SW, removed Xcode's DerivedData and reset the iOS Simulator, but with the same disappointing result.
All projects I have tried are working perfectly fine when I run them on my iPhone. I have also another mac where everything works fine on the simulator. So clearly something must have happened with this particular machine.
Any advice?
Update
Initially, I focused entirely on the first warning message (ADDRESPONSE - ADDING TO MEMORY ONLY: http://dl.google.com/geosdk/latest), but I have now realised that the only purpose of the URL mentioned there is to download a string with the latest SDK version number (currently "1.3.0.3430"). Since the SDK then correctly prints that string two lines further down, I find it very unlikely that this line is related to the real cause of the crash. (I have changed the title of this question accordingly.)
Hard to say if this really qualifies as an answer...
In any case, I'd like to document the outcome of this, in case someone else stumbles upon the same problem in the future:
After having been away a couple of days, I returned today, turned on my iMac, made a new test run, and...
The problem was gone!
Everything just worked as expected!
I have not changed a single line of code or anything at all in the Xcode configuration.
The only thing I did was to once again delete Xcode's DerivedData and reset the simulator (which I did numerous times last week, but without success at that time).
I guess that my assumption must have been right, that there must have been a cache somewhere in my machine, but outside Xcode´s DerivedData, that caused this problem. Then I was away a couple of days, and this cache simply timed out!
Even if this may sound a bit far-fetched, I cannot think of another reason for this weird behaviour.
It would have been really useful to know where this cache is located, so that one could clean it up without needing to shut down the mac for some days!
I have an app I'm developing where setting a breakpoint in Xcode while the app is running causes it to crash. At least I assume it is a crash. There is nothing in the console saying what happened. The app just terminates.
Note that the break point is not being hit, just the act of setting it causes this.
I've developed many apps and this is the first to act like this. Does anyone have any ideas what could be happening or how to figure this out? It is really slowing down my debugging.
I'm assuming you're using Xcode 4.x. Try going into your scheme's settings and switch to a different debugger (GDB if you have LLDB currently set, or vice versa).
If that doesn't work, we need more info:
which version of Xcode and iOS are you using?
does the problem occur in the Simulator or on your device, or both?
have you tried placing a breakpoint in different places in your code?
As far as I can tell, it's a debugger issue. So your app does not actually crash, it's the debug session that crashes which causes the app to terminate. You can observe a similar effect when you hit Stop in Xcode or disconnect your device while an app is attached to the debugger in Xcode.
Might be an issue with mismatching Xcode and iOS versions. Please provide more info about your environment to help diagnose the problem.