Comments (11)
enh
commented on August 22, 2024
9
we're looking at adding <execinfo.h> (http://man7.org/linux/man-pages/man3/backtrace.3.html) in a future release.
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dipankar08
commented on August 22, 2024
Here is the callstack. we are getting this for ARM build. As you can see the IP of the below stack is completely wrong.
03-08 17:27:17.796 19915 20022 E FOO : ####################### EXCEPTION CALLSTACK #########################
03-08 17:27:17.799 19915 20022 E STACKTRACE: Frame:[#0] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.799 19915 20022 E STACKTRACE: Frame:[#1] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.799 19915 20022 E STACKTRACE: Frame:[#2] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#3] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#4] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#5] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#6] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#7] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#8] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#9] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#10] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#11] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#12] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#13] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#14] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#15] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.800 19915 20022 E STACKTRACE: Frame:[#16] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.801 19915 20022 E STACKTRACE: Frame:[#17] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.802 19915 20022 E STACKTRACE: Frame:[#18] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#19] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#20] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#21] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#22] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#23] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#24] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#25] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#26] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#27] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#28] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#29] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
03-08 17:27:17.803 19915 20022 E STACKTRACE: Frame:[#30] IP:[0x70902cd4] Function:[SetLastExceptionInfoForThread()]
BTW, there are an easier way to get the callstack in linux by using backtrace () as part of execinfo.h, which is not supported for Android. Do you have any plan to get this header/so inplace in future version of android ?
I am using clang compiler with androidndk.10.4.1 tool chain.
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DanAlbert
commented on August 22, 2024
You don't need to backtrace yourself. debuggerd is a built in part of android that will print a backtrace of your app when it crashes.
As for fixing the underlying bug, we need more information. What STL are you using?
androidndk.10.4.1 tool chain
There's no such thing. Is that an Android Studio version? Are you using NDK r11b? If you're not using r11b, that's the first thing to check.
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dipankar08
commented on August 22, 2024
Hello,
We are using r10d only as r10e had toolchain problems.
We are currently using clang3.5. and gcc4.9 (for support toolchain)
We are using stl library located at sources\cxx-stl\gnu-libstdc++ in the NDK.
Thanks
Dipankar
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DanAlbert
commented on August 22, 2024
Reopen if this is still present in r11b. Clang has been completely redone (we threw away the old crappy hacked about source that was in the NDK and reset to upstream), so there's a significant chance the problem will go away just by upgrading.
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minggo
commented on August 22, 2024
debuggerd is a built in part of android that will print a backtrace of your app when it crashes.
@DanAlbert does it work in release mode too? Can it work only using clang, or can also work with gcc?
Thanks.
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DanAlbert
commented on August 22, 2024
As long as your app can be unwound (debuggerd will try a lot of different ways to do this), it will be unwound. Should work with essentially any binary.
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minggo
commented on August 22, 2024
Thanks.
What does your app can be unwound mean?
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DanAlbert
commented on August 22, 2024
As long as you haven't gone out of your way to obfuscate it then it should be fine.
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bsergean
commented on August 22, 2024
Hi there,
Computing a backtrace can be very helpful in other context, rather than just for handling crashes. For example in a large code base you can record where an API is used, and put that in an associative array (key = backtrace, value = hit-count). It can be used for ad'hoc memory leak detector etc...
Obviously I am not aware of the complexity of support this, but it would make the Android platform more developer friendly and comparable to other platform (this is available in Linux and macOS) to do so.
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alexeikh
commented on August 22, 2024
Before <execinfo.h> is added, maybe my small app for testing 3 backtracing methods on Android will be helpful for someone: https://github.com/alexeikh/android-ndk-backtrace-test
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