I've used Xcode's zombie debugger and managed to find this flag upon launch:
This crashed the app, and re-recording from Instruments caused the same result. Relaunching the app from the device made the app launch without a crash and subsequent launches from Instruments resulted in normal operation without flags or crashes.
Can anyone make sense of this or advise? I'm getting a number of "heap corruption" crashes in production. The reports are limited to a handful of users, but I'm afraid that number is growing.
It looks like the Parse SDK's latest release notes (1.15.1) addresses this:
-Adds polygonal queries
-Fixes memory leaks related with PFCommandCache
But my crash reports are coming from builds with this SDK version.
The Parse team has responded saying that a fix for this is coming to a new SDK release soon. :)
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.
I got this warning when running my application with HockeyApp integration:
[HockeySDK] WARNING: Detecting crashes is NOT enabled due to running the app with a debugger attached.
Crash reports are not sent and no alert is displayed when opening the app again.
Any one have any idea how to resolve this issue?
This has very simple reasons:
If you are running the app with Xcode attached, your app is connected to lldb, Xcode's debugger. When lldb is attached, it will of course do its job as a debugger and catch any exception or crash that occurs. This means that the crash can never reach the HockeyApp SDK or any other crash reporting SDK while lldb is attached at the same time.
The solution is also pretty simple. If you just want to make sure the SDK is integrated properly and will catch crashes, do the following:
Do a quick "Build & Run" to install the current version of the app on the simulator or device.
Click the "Stop" button in Xcode to stop the debugging session.
Manually start the app on the device or simulator by tapping or clicking the app icon.
Cause a crash.
Restart the app. Now the HockeySDK should process the crash report and show a dialog to approve crash log sending.
One thing to keep in mind: Make sure to not make the app crash immediately after app start as this would not give the SDK enough time to process and send the crash report before crashing again.
Hockey app sdk by default does not send report when a debugger is attached. There is nothing wrong with this.
It will send report when a archive build that release to ur tester cause a crash. I personally think this should and remain as this because you are trying to track crashes from your tester not when you are developing.
When an app is built with -O (fastest) setting , crashes occur very quickly at seemingly random places.
Occurs in latest beta as well as final.
How would one track those down?
Tried allocations instrument with NSZombie detection enabled.
Tried crashlytics and/or device crash reports but they are similarliy cryptic to me.
Started to put debug messages in the code, trying to find out where it sometimes hits.
I read here and on the apple dev formus that it could be related to core data fetches, to upper/lower case String operations, Array conversions from/to NSArray, etc.
All I am getting currently is:
malloc: *** error for object 0x174e3439c: Invalid pointer dequeued from free list
*** set a breakpoint in malloc_error_break to debug
Turning off optimizations in release mode with -Onone seems to fix the problem(s) I am experiencing with my code.
Any pointers would be highly appreciated.
IN iOS 8.2 Device, my application got crashed,So to see the crash logs i connected my device to Mac (Xcode->devices->Device logs)
.There were no crash(.Crash) files generated instead “JetsamEvent-2015-03-18-151504.ips” files were generated which were of no use.And i am also using PLCrashReporter framework to collect crashes , but it is also not helpful in finding these crash files.Do anyone know why the crash file was not generated for my app crash?
Anyone have face this issue.
Thank you.
JetsamEvent log is so called Low Memory Report.
So, it is highly possible that your App was killed by system due to memory shortage.
References
- My app crashes and closes down and there is very little information as to why
- Understanding Low Memory Reports (*a little bit outdated)
I've got an app that crashes even before the debugger can connect.
I placed a break point on the first line of main(). (I added an NSLog statement as very first statement in main() and set the break point there.
The app seems to start. The main screen with some ui elements becomes visible on the screen. Then it disappears.
There is no crash log found on the devices.
Xcode message:
Could not launch "appname"
process launch failed: failed to get the task for process xyz
Debugging is enabled of course.
The same for the profiler Instruments.
Code signing works fine so that the app can be deployed to the devices.
(Same for enterprise distribution. And the app validates for store submission.)
It does work on the simulator though.
The app used to work fine. I was just about to build it for the store. For final tests on iOS 8.1 I upgraded to Xcode 6.1 with SDK 8.1. But the problem did not occur directly after the upgrade. It worked just fine.
Then it crashed when building for release for enterprise distribution.
The AppStore build crashed in the same manner (according to Apple, the app was rejected of course.)
But it ran nicely in debug modes.
Now I was trying whether compiler options for optimization may make all the difference and I was trying to build in release mode with debugging enabled etc and end up with a debug build crashing as well. (No optimization in debug).
So it may well be that the migration to Xcode 6.1 did cause it but the problem may have come effective only after Xcode cleaned and rebuild the project in response to changes to compiler settings for code optimization.
Sorry for the long text. I tried to put everything in that may be of importance.
Reason is most likely some incompatibility of Crackify and iOS 8.1.
Therefore it may be of interest for others, altough my problem along with these symptoms may be very special.
Very early within AppDelegate didFinishLaunchingWithOptions we have had the following statement.
if ([Crackify isCracked] || [self isCertificateUnvalid])
exit(173);
That, as such, is not really well designed. The app is just terminated rather than any error message displayed to the user. Thus, it appears as if the app has crashed. But it has not crashed and therefore no crashlog is provided.
For reasons which I don't yet understand and which may not be related to this error, my debugger did not manage to hook up into the executed app. Once that was overcome (suddenly the debugger worked without any changes made to any of the debugging related settings) the error was found rather quickly.
This is Crackify: https://github.com/itruf/crackify
Within Crackify it was this code sniplet that caused the problem:
static NSString *str2 = #"ResourceRules.plist";
BOOL fileExists3 = [manager fileExistsAtPath:([NSString stringWithFormat:#"%#/%#", bundlePath, str2])];
if (!fileExists3) {
return YES;
}
For reasons that I did not further investigate, the file, that is tested here, apparently does not exist in iOS 8.1 any more.