SIGSEV - Unity application (compiled for cardboard) crashes on Android 7.0

Target Platforms Mobile
1

I’m getting application crash on Android 7.0 in Unity application compiled for cardboard.
Any help with debugging this issue appreciated (package name masked)

03-12 22:29:54.006 15738 15758 F libc    : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x32 in tid 15758 (UnityMain)
03-12 22:29:54.012  3108  3108 W         : debuggerd: handling request: pid=15738 uid=10507 gid=10507 tid=15758
03-12 22:29:54.258 16069 16069 F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
03-12 22:29:54.259 16069 16069 F DEBUG   : Build fingerprint: 'samsung/hero2ltexx/hero2lte:7.0/NRD90M/G935FXXU1DQB7:user/release-keys'
03-12 22:29:54.259 16069 16069 F DEBUG   : Revision: '9'
03-12 22:29:54.260 16069 16069 F DEBUG   : ABI: 'arm'
03-12 22:29:54.260 16069 16069 F DEBUG   : pid: 15738, tid: 15758, name: UnityMain  >>> CORRECT.APP.PACKAGE <<<
03-12 22:29:54.260 16069 16069 F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x32
03-12 22:29:54.260 16069 16069 F DEBUG   :     r0 e687d9dc  r1 9127b1b0  r2 00000033  r3 9d7837f0
03-12 22:29:54.260 16069 16069 F DEBUG   :     r4 e687e4c4  r5 e687e4b0  r6 9127b1b0  r7 9d7837f0
03-12 22:29:54.261 16069 16069 F DEBUG   :     r8 92683578  r9 00000000  sl 00000000  fp e687e2f0
03-12 22:29:54.261 16069 16069 F DEBUG   :     ip cf254188  sp e687d9c8  lr cf2541c0  pc 00000032  cpsr a00b0030
03-12 22:29:54.276 16069 16069 F DEBUG   :
03-12 22:29:54.276 16069 16069 F DEBUG   : backtrace:
03-12 22:29:54.277 16069 16069 F DEBUG   :     #00 pc 00000032  <unknown>
03-12 22:29:54.277 16069 16069 F DEBUG   :     #01 pc 0044b1bc  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.277 16069 16069 F DEBUG   :     #02 pc 00b9ff00  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.277 16069 16069 F DEBUG   :     #03 pc 00cc1de0  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #04 pc 00cc7310  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #05 pc 00cbacd8  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #06 pc 00ba16ac  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #07 pc 00ba1d14  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #08 pc 00431474  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #09 pc 0042e0b8  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #10 pc 00660afc  /data/app/CORRECT.APP.PACKAGE-2/lib/arm/libunity.so
03-12 22:29:54.278 16069 16069 F DEBUG   :     #11 pc 0000bc6c  <anonymous:e696e000>
2

You can have a look at my post on how to decipher this crash stack trace: Loading...

3

Thank you for reference, didn’t know that Unity publishess symbols.
However the stacktrace is not very helpful. The backtrace in the libunity is

:~$  addr2line -Cfe /opt/Unity/Editor/Data/PlaybackEngines/AndroidPlayer/Variations/mono/Release/Symbols/armeabi-v7a/libunity.sym.so
0044b1bc
void MonoScript::Transfer<SafeBinaryRead>(SafeBinaryRead&)
??:?
00b9ff00
physx::Sc::NPhaseCore::createParticlePacketBodyInteraction(physx::Sc::ParticlePacketShape&, physx::Sc::ShapeSim&, unsigned int)
??:?
00cc1de0
physx::HullLibrary::expandhull(physx::float3*, int, physx::float3*&, int&, float)
??:?
00cc7310
physx::shdfnd::Array<physx::PxBounds3V, physx::shdfnd::ReflectionAllocator<physx::PxBounds3V> >::growAndPushBack(physx::PxBounds3V const&)
??:?
00cbacd8
physx::ConvexMeshBuilder::save(physx::PxOutputStream&, bool) const
??:?
00ba16ac
physx::Sc::RigidCore::getPxActor() const
??:?
00ba1d14
ScBeforeSolverTask::runInternal()
??:?
00431474
BuiltinShaderParamValues::BuiltinShaderParamValues()
??:?
0042e0b8
CalculateAmbientFaceProcessor::operator()(Image&, int, Vector3f const&, Vector3f const&, Vector3f const&, bool)
??:?
00660afc
void std::__final_insertion_sort<Effector2D::EffectorContact*, __gnu_cxx::__ops::_Iter_comp_iter<Effector2D::EffectorContact::PredecateContactGrouping> >(Effector2D::EffectorContact*, Effector2D::EffectorContact*, __gnu_cxx::__ops::_Iter_comp_iter<Effector2D::EffectorContact::PredecateContactGrouping>)
??:?
4

are you sure you ran it with the symbols matching the exact release of Unity that produced the crashing build ?

5

Well, not sure.
I’m developing on 5.5, but building on cloud build. The settings are 5.5, but if they match precisely - don’t know.

6

in cloud build you can select which exact version of the engine to use. you should use this exact version and the symbols from it to decode the crash.

7

did you get the right crash stack trace for this case ?