libMNN.so在android上会偶现多线程crash问题

[keke444]

 在Ubuntu 18.04平台上编译了1.2.0版本的libMNN.so 在android手机上测试时，会 偶然出现以下的crash问题

D91D34 05-15 17:47:37.583 30895 30895 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
CD91D35 05-15 17:47:37.583 30895 30895 F DEBUG : Native Crash TIME: 167356540
CD91D36 05-15 17:47:37.583 30895 30895 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
CD91D37 05-15 17:47:37.583 30895 30895 F DEBUG : Build fingerprint: 'Nokia/Penguin_00WW/PGN:12/SP1A.210812.016/00WW_0_190:user/release-keys'
CD91D38 05-15 17:47:37.583 30895 30895 F DEBUG : Revision: '0'
CD91D39 05-15 17:47:37.583 30895 30895 F DEBUG : ABI: 'arm'
CD91D3A 05-15 17:47:37.583 30895 30895 F DEBUG : Timestamp: 2022-05-15 17:47:36.621948243+0800
CD91D3B 05-15 17:47:37.583 30895 30895 F DEBUG : Process uptime: 0s
CD91D3C 05-15 17:47:37.583 30895 30895 F DEBUG : Cmdline: /vendor/bin/hw/android.hardware.camera.provider@2.4-service
CD91D3D 05-15 17:47:37.583 30895 30895 F DEBUG : pid: 10799, tid: 30887, name: gd_oem >>> /vendor/bin/hw/android.hardware.camera.provider@2.4-service <<<
CD91D3E 05-15 17:47:37.583 30895 30895 F DEBUG : uid: 1047
SD91D3F 05-15 17:47:37.583 1140 4347 D WindowManager: Relayout Window=Window{ac5b6fa u0 com.android.camera2/com.android.camera.CameraLauncher} ,oldVis=0 ,newVis=0 ,focusMayChange=false
CD91D40 05-15 17:47:37.583 30895 30895 F DEBUG : signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
CD91D41 05-15 17:47:37.584 30895 30895 F DEBUG : Abort message: '/buildbot/src/android/ndk-release-r21/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:72: abort_message: assertion "cannot create thread specific key for __cxa_get_globals()" failed'
CD91D42 05-15 17:47:37.584 30895 30895 F DEBUG : r0 00000000 r1 000078a7 r2 00000006 r3 d317d008
CD91D43 05-15 17:47:37.584 30895 30895 F DEBUG : r4 d317d01c r5 d317d000 r6 00002a2f r7 0000016b
CD91D44 05-15 17:47:37.584 30895 30895 F DEBUG : r8 d317d008 r9 d317d018 r10 d317d038 r11 d317d028
CD91D45 05-15 17:47:37.584 30895 30895 F DEBUG : ip 000078a7 sp d317cfd8 lr ecfbe909 pc ecfbe91c
CD91D46 05-15 17:47:37.584 30895 30895 F DEBUG : backtrace:
CD91D47 05-15 17:47:37.584 30895 30895 F DEBUG : #00 pc 0003891c /apex/com.android.runtime/lib/bionic/libc.so (abort+172) (BuildId: 679771dd555d9b049d218a1062b556ac)
CD91D48 05-15 17:47:37.584 30895 30895 F DEBUG : #1 pc 00038b93 /apex/com.android.runtime/lib/bionic/libc.so (__assert2+22) (BuildId: 679771dd555d9b049d218a1062b556ac)
CD91D49 05-15 17:47:37.584 30895 30895 F DEBUG : #2 pc 000969a7 /vendor/lib/libMNN.so (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D4A 05-15 17:47:37.584 30895 30895 F DEBUG : #3 pc 00094d71 /vendor/lib/libMNN.so (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D4B 05-15 17:47:37.584 30895 30895 F DEBUG : #4 pc 00081daf /apex/com.android.runtime/lib/bionic/libc.so (pthread_once+82) (BuildId: 679771dd555d9b049d218a1062b556ac)
CD91D4C 05-15 17:47:37.584 30895 30895 F DEBUG : #5 pc 00094d33 /vendor/lib/libMNN.so (__cxa_get_globals_fast+14) (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D4D 05-15 17:47:37.584 30895 30895 F DEBUG : #6 pc 00094ce1 /vendor/lib/libMNN.so (__cxa_get_globals+4) (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D4E 05-15 17:47:37.584 30895 30895 F DEBUG : #7 pc 000948b7 /vendor/lib/libMNN.so (__cxa_throw+14) (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D4F 05-15 17:47:37.584 30895 30895 F DEBUG : #8 pc 0009385d /vendor/lib/libMNN.so (std::__ndk1::__throw_system_error(int, char const*)+56) (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D50 05-15 17:47:37.584 30895 30895 F DEBUG : #9 pc 00093a7d /vendor/lib/libMNN.so (std::__ndk1::__thread_specific_ptrstd::__ndk1::__thread_struct::__thread_specific_ptr()+24) (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D51 05-15 17:47:37.584 30895 30895 F DEBUG : #10 pc 00093a3d /vendor/lib/libMNN.so (std::__ndk1::__thread_local_data()+40) (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
CD91D52 05-15 17:47:37.584 30895 30895 F DEBUG : #11 pc 0008cffb /vendor/lib/libMNN.so (BuildId: 0464cc470db9ffa1f6c450cc0abb71e05870e14c)
SD91D53 05-15 17:47:37.584 1140 4347 V WindowManager: prepareSurfaceLocked controller mSurfaceController: Surface(name=com.android.systemui.ImageWallpaper)/@0xc537206 mLastHidden: true mLastAlpha: 1.0 mShownAlpha: 1.0 mAlpha: 1.0 w.isParentWindowHidden(): false w.isOnScreen(): false win: Window{2d2be48 u0 com.android.systemui.ImageWallpaper}
CD91D54 05-15 17:47:37.584 30895 30895 F DEBUG : #12 pc 00080853 /apex/com.android.runtime/lib/bionic/libc.so (__pthread_start(void*)+40) (BuildId: 679771dd555d9b049d218a1062b556ac)
CD91D55 05-15 17:47:37.585 30895 30895 F DEBUG : #13 pc 00039875 /apex/com.android.runtime/lib/bionic/libc.so (__start_thread+30) (BuildId: 679771dd555d9b049d218a1062b556ac)

请问这会是什么原因导致的？

[jxt1234]

开启了 openmp ?

[Pony23333]

我在安卓上遇到了类似的问题，addr2line的结果是，请问如何解决

[keke444]

开启了 openmp ?
并没有开

[jxt1234]

有可能是线程句柄不够了。。。 是什么类型的 android 机器

[keke444]

有可能是线程句柄不够了。。。 是什么类型的 android 机器

我们用的就是原生的android机器，线程句柄不够是什么意思呢？内存还是啥

[jxt1234]

就是 android 里面一个 app 所能创建的线程数是有限制的，超过就会报句柄不够而崩溃，有可能你 app 其他代码创建了很多线程。这个一般在比较低端的 android 机器上出现，可以看下是否是低端机

[keke444]

就我们在crash中，看到编译工具ndk的问题，想知道编译libmnn.so 时，跟ndk的版本有关系吗？以及-DANDROID_TOOLCHAIN=clang 有关系吗？会不会用gcc更好，cmake编译设置如下：
#!/bin/bash
cmake ../../../
-DCMAKE_TOOLCHAIN_FILE=/docker/tensorflow/android-ndk-r21/build/cmake/android.toolchain.cmake
-DCMAKE_BUILD_TYPE=Release
-DANDROID_ABI="armeabi-v7a"
-DANDROID_STL=c++_static
-DCMAKE_BUILD_TYPE=Release
-DANDROID_NATIVE_API_LEVEL=android-21
-DANDROID_TOOLCHAIN=clang
-DMNN_USE_LOGCAT=false
-DMNN_USE_SSE=OFF
-DMNN_SUPPORT_BF16=OFF
-DMNN_BUILD_TEST=ON
-DMNN_BUILD_FOR_ANDROID_COMMAND=true
-DNATIVE_LIBRARY_OUTPUT=. -DNATIVE_INCLUDE_OUTPUT=. $1 $2 $3

make -j4

感觉有没有可能是多线程保护机制有关？我们这crash大概是跑个一两百次才会出现，觉得很奇怪？

谢谢

[jxt1234]

android ndk 可以更新到 21 及以上试试，后续的 ndk 都是用 clang 的，按理是 clang 更好