error: undefined reference to ‘pthread_spin_XX’
問題：
error: undefined reference to 'pthread_spin_lock'
error: undefined reference to 'pthread_spin_unlock'
error: undefined reference to 'pthread_spin_init'
error: undefined reference to 'pthread_spin_destroy'
解決：
APP_PLATFORM 需要改成 android-24 或以上版本才支持 pthread 自旋鎖。
使用 Application.mk 時，做一下修改（使用 Cmake 時也需做對應修改）：
...
APP_PLATFORM := android-24
...
error: undefined reference to ‘cv::imwrite’
問題：
NDK（ndkr20） 使用 OpenCV (3.4.2) 出現的編譯問題
error: undefined reference to 'cv::imwrite(cv::String const&, cv::_InputArray const&, std::__ndk1::vector<int, std::__ndk1::allocator<int> > const&)'
解決：
App 目錄下的 build.gradle 文件作如下修改：
externalNativeBuild {
cmake {
cppFlags '-std=c++11 -fopenmp'
arguments '-DANDROID_PLATFORM=android-24',
'-DANDROID_TOOLCHAIN=clang++',
'-DANDROID_STL=c++_static',
"-DANDROID_ARM_NEON=TRUE",
"-DANDROID_ALLOW_UNDEFINED_SYMBOLS=TRUE"
}
}
error: undefined reference to 'std::__ndk1::__fs::filesystem::
問題：
error: undefined reference to 'std::__ndk1::__fs::filesystem::directory_iterator::__dereference() const'
error: undefined reference to 'std::__ndk1::__fs::filesystem::directory_iterator::directory_iterator(std::__ndk1::__fs::filesystem::path const&, std::__ndk1::error_code*, std::__ndk1::__fs::filesystem::directory_options)'
error: undefined reference to 'std::__ndk1::__fs::filesystem::directory_iterator::__increment(std::__ndk1::error_code*)'
error: undefined reference to 'std::__ndk1::__fs::filesystem::directory_iterator::__dereference()
解決：
低版本 NDK 不支持 filesystem ，修改 NDK 版本，如 NDK r20 。
stack corruption detected
問題：
06-17 08:54:08.226 10713 10713 F libc : stack corruption detected (-fstack-protector)
06-17 08:54:08.226 10713 10713 F libc : Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 10713 (low.learnffmpeg), pid 10713 (low.learnffmpeg)
06-17 08:54:08.295 10762 10762 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-17 08:54:08.296 10762 10762 F DEBUG : Build fingerprint: 'samsung/beyond2qltesq/beyond2q:9/PPR1.180610.011/G975USQU1ASC6:userdebug/test-keys'
06-17 08:54:08.296 10762 10762 F DEBUG : Revision: '13'
06-17 08:54:08.296 10762 10762 F DEBUG : ABI: 'arm64'
06-17 08:54:08.296 10762 10762 F DEBUG : pid: 10713, tid: 10713, name: low.learnffmpeg >>> com.byteflow.learnffmpeg <<<
06-17 08:54:08.296 10762 10762 F DEBUG : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
06-17 08:54:08.296 10762 10762 F DEBUG : Abort message: 'stack corruption detected (-fstack-protector)'
06-17 08:54:08.296 10762 10762 F DEBUG : x0 0000000000000000 x1 00000000000029d9 x2 0000000000000006 x3 0000000000000008
06-17 08:54:08.296 10762 10762 F DEBUG : x4 0000000000000000 x5 0000000000000000 x6 0000000000000000 x7 0000000000000030
06-17 08:54:08.296 10762 10762 F DEBUG : x8 0000000000000083 x9 522dc3403fd55b7d x10 0000000000000000 x11 fffffffc7ffffbdf
06-17 08:54:08.296 10762 10762 F DEBUG : x12 0000000000000001 x13 000000005ee969b0 x14 000c8768dead0062 x15 0000f7bd6d6914c5
06-17 08:54:08.296 10762 10762 F DEBUG : x16 000000777ac5c2a8 x17 000000777ab7ced0 x18 0000000000000010 x19 00000000000029d9
06-17 08:54:08.296 10762 10762 F DEBUG : x20 00000000000029d9 x21 00000076f9c14c00 x22 0000007fc4ac3430 x23 00000076f5882504
06-17 08:54:08.296 10762 10762 F DEBUG : x24 0000000000000000 x25 0000007780b7b5f8 x26 00000076f9c14ca0 x27 0000000000000000
06-17 08:54:08.296 10762 10762 F DEBUG : x28 0000007fc4ac3170 x29 0000007fc4ac2c30
06-17 08:54:08.296 10762 10762 F DEBUG : sp 0000007fc4ac2bf0 lr 000000777ab6f33c pc 000000777ab6f364
06-17 08:54:08.296 10762 10762 F DEBUG : backtrace:
06-17 08:54:08.296 10762 10762 F DEBUG : #00 pc 0000000000022364 /system/lib64/libc.so (abort+116)
06-17 08:54:08.296 10762 10762 F DEBUG : #01 pc 000000000007c140 /system/lib64/libc.so (__stack_chk_fail+20)
解決：問題原因是棧內存被破壞，一般是數組越界導致，檢查棧內存數組是否分配過小了。
Fatal signal 7 (SIGBUS), code 1 (BUS_ADRALN), ReferenceQueueD
問題：
06-29 13:10:15.134 4232 4242 F libc : Fatal signal 7 (SIGBUS), code 1 (BUS_ADRALN), fault addr 0x5f626d75687415 in tid 4242 (ReferenceQueueD), pid 4232 (low.learnffmpeg)
06-29 13:10:15.237 4867 4867 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-29 13:10:15.237 4867 4867 F DEBUG : Build fingerprint: 'samsung/beyond2qltesq/beyond2q:9/PPR1.180610.011/G975USQU1ASC6:userdebug/test-keys'
06-29 13:10:15.237 4867 4867 F DEBUG : Revision: '13'
06-29 13:10:15.237 4867 4867 F DEBUG : ABI: 'arm64'
06-29 13:10:15.237 4867 4867 F DEBUG : pid: 4232, tid: 4242, name: ReferenceQueueD >>> com.byteflow.learnffmpeg <<<
06-29 13:10:15.238 4867 4867 F DEBUG : signal 7 (SIGBUS), code 1 (BUS_ADRALN), fault addr 0x5f626d75687415
06-29 13:10:15.238 4867 4867 F DEBUG : x0 305f626d7568740d x1 00000076e5586544 x2 000000777eb6c064 x3 00000076f0758b20
06-29 13:10:15.238 4867 4867 F DEBUG : x4 00000076e5586990 x5 0000000072debce8 x6 712e666d606b2e60 x7 0000000000000000
06-29 13:10:15.238 4867 4867 F DEBUG : x8 000000007568740d x9 00000076f0758b28 x10 00000076f1506d48 x11 0000000000000000
06-29 13:10:15.238 4867 4867 F DEBUG : x12 00000000f1506cf7 x13 305f626d75687415 x14 00000076f99981e4 x15 0000000000000000
06-29 13:10:15.238 4867 4867 F DEBUG : x16 000000777fc5a1b8 x17 000000777f6aa804 x18 0000000000000000 x19 00000076f0758b20
06-29 13:10:15.238 4867 4867 F DEBUG : x20 00000076f57ffe74 x21 00000076f9cb9000 x22 00000076e55867e0 x23 0000000072debce8
06-29 13:10:15.238 4867 4867 F DEBUG : x24 0000000000000010 x25 00000076e5588588 x26 00000076f9cb90a0 x27 0000000000000004
06-29 13:10:15.238 4867 4867 F DEBUG : x28 0000000000000000 x29 00000076e5586500
06-29 13:10:15.238 4867 4867 F DEBUG : sp 00000076e55864f0 lr 000000777eb6c080 pc 000000777f6aa94c
06-29 13:10:15.271 4867 4867 F DEBUG :
06-29 13:10:15.271 4867 4867 F DEBUG : backtrace:
06-29 13:10:15.271 4867 4867 F DEBUG : #00 pc 000000000032e94c /system/lib64/libhwui.so (SkPaint::~SkPaint()+328)
06-29 13:10:15.271 4867 4867 F DEBUG : #01 pc 000000000016207c /system/lib64/libandroid_runtime.so (android::PaintGlue::deletePaint(android::Paint*)+24)
06-29 13:10:15.271 4867 4867 F DEBUG : #02 pc 000000000016207c /system/lib64/libandroid_runtime.so (android::PaintGlue::deletePaint(android::Paint*)+24)
06-29 13:10:15.271 4867 4867 F DEBUG : #03 pc 000000000007dc20 /system/framework/arm64/boot-core-libart.oat (offset 0x7a000) (java.math.NativeBN.BN_copy [DEDUPED]+160)
06-29 13:10:15.271 4867 4867 F DEBUG : #04 pc 000000000055824c /system/lib64/libart.so (art_quick_invoke_static_stub+604)
06-29 13:10:15.271 4867 4867 F DEBUG : #05 pc 00000000000cfce8 /system/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+232)
06-29 13:10:15.271 4867 4867 F DEBUG : #06 pc 0000000000280438 /system/lib64/libart.so (art::interpreter::ArtInterpreterToCompiledCodeBridge(art::Thread*, art::ArtMethod*, art::ShadowFrame*, unsigned short, art::JValue*)+344)
06-29 13:10:15.271 4867 4867 F DEBUG : #07 pc 000000000027a440 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+968)
06-29 13:10:15.271 4867 4867 F DEBUG : #08 pc 0000000000528408 /system/lib64/libart.so (MterpInvokeStatic+204)
06-29 13:10:15.271 4867 4867 F DEBUG : #09 pc 000000000054a714 /system/lib64/libart.so (ExecuteMterpImpl+14612)
06-29 13:10:15.271 4867 4867 F DEBUG : #10 pc 00000000000b9420 /system/framework/boot-core-libart.vdex (libcore.util.NativeAllocationRegistry$CleanerThunk.run+32)
06-29 13:10:15.271 4867 4867 F DEBUG : #11 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #12 pc 0000000000259c38 /system/lib64/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+216)
06-29 13:10:15.271 4867 4867 F DEBUG : #13 pc 000000000027a424 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+940)
06-29 13:10:15.271 4867 4867 F DEBUG : #14 pc 0000000000527e80 /system/lib64/libart.so (MterpInvokeInterface+1392)
06-29 13:10:15.271 4867 4867 F DEBUG : #15 pc 000000000054a794 /system/lib64/libart.so (ExecuteMterpImpl+14740)
06-29 13:10:15.271 4867 4867 F DEBUG : #16 pc 00000000001266e2 /system/framework/boot.vdex (sun.misc.Cleaner.clean+18)
06-29 13:10:15.271 4867 4867 F DEBUG : #17 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #18 pc 0000000000259c38 /system/lib64/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+216)
06-29 13:10:15.271 4867 4867 F DEBUG : #19 pc 000000000027a424 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+940)
06-29 13:10:15.271 4867 4867 F DEBUG : #20 pc 0000000000526f04 /system/lib64/libart.so (MterpInvokeVirtual+588)
06-29 13:10:15.271 4867 4867 F DEBUG : #21 pc 000000000054a594 /system/lib64/libart.so (ExecuteMterpImpl+14228)
06-29 13:10:15.271 4867 4867 F DEBUG : #22 pc 00000000000cba90 /system/framework/boot.vdex (java.lang.ref.ReferenceQueue.enqueueLocked+28)
06-29 13:10:15.271 4867 4867 F DEBUG : #23 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #24 pc 0000000000259c38 /system/lib64/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+216)
06-29 13:10:15.271 4867 4867 F DEBUG : #25 pc 000000000027a424 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+940)
06-29 13:10:15.271 4867 4867 F DEBUG : #26 pc 0000000000528244 /system/lib64/libart.so (MterpInvokeDirect+296)
06-29 13:10:15.271 4867 4867 F DEBUG : #27 pc 000000000054a694 /system/lib64/libart.so (ExecuteMterpImpl+14484)
06-29 13:10:15.271 4867 4867 F DEBUG : #28 pc 00000000000cbc74 /system/framework/boot.vdex (java.lang.ref.ReferenceQueue.enqueuePending+36)
06-29 13:10:15.271 4867 4867 F DEBUG : #29 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #30 pc 0000000000259c38 /system/lib64/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+216)
06-29 13:10:15.271 4867 4867 F DEBUG : #31 pc 000000000027a424 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+940)
06-29 13:10:15.271 4867 4867 F DEBUG : #32 pc 0000000000528408 /system/lib64/libart.so (MterpInvokeStatic+204)
06-29 13:10:15.271 4867 4867 F DEBUG : #33 pc 000000000054a714 /system/lib64/libart.so (ExecuteMterpImpl+14612)
06-29 13:10:15.271 4867 4867 F DEBUG : #34 pc 00000000000af1f6 /system/framework/boot-core-libart.vdex (java.lang.Daemons$ReferenceQueueDaemon.runInternal+54)
06-29 13:10:15.271 4867 4867 F DEBUG : #35 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #36 pc 0000000000259c38 /system/lib64/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+216)
06-29 13:10:15.271 4867 4867 F DEBUG : #37 pc 000000000027a424 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+940)
06-29 13:10:15.271 4867 4867 F DEBUG : #38 pc 0000000000526f04 /system/lib64/libart.so (MterpInvokeVirtual+588)
06-29 13:10:15.271 4867 4867 F DEBUG : #39 pc 000000000054a594 /system/lib64/libart.so (ExecuteMterpImpl+14228)
06-29 13:10:15.271 4867 4867 F DEBUG : #40 pc 00000000000aecf0 /system/framework/boot-core-libart.vdex (java.lang.Daemons$Daemon.run+20)
06-29 13:10:15.271 4867 4867 F DEBUG : #41 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #42 pc 0000000000259c38 /system/lib64/libart.so (art::interpreter::ArtInterpreterToInterpreterBridge(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame*, art::JValue*)+216)
06-29 13:10:15.271 4867 4867 F DEBUG : #43 pc 000000000027a424 /system/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+940)
06-29 13:10:15.271 4867 4867 F DEBUG : #44 pc 0000000000527e80 /system/lib64/libart.so (MterpInvokeInterface+1392)
06-29 13:10:15.271 4867 4867 F DEBUG : #45 pc 000000000054a794 /system/lib64/libart.so (ExecuteMterpImpl+14740)
06-29 13:10:15.271 4867 4867 F DEBUG : #46 pc 00000000000ca97a /system/framework/boot.vdex (java.lang.Thread.run+12)
06-29 13:10:15.271 4867 4867 F DEBUG : #47 pc 0000000000254144 /system/lib64/libart.so (_ZN3art11interpreterL7ExecuteEPNS_6ThreadERKNS_20CodeItemDataAccessorERNS_11ShadowFrameENS_6JValueEb.llvm.2978999722+488)
06-29 13:10:15.271 4867 4867 F DEBUG : #48 pc 0000000000517798 /system/lib64/libart.so (artQuickToInterpreterBridge+1020)
06-29 13:10:15.271 4867 4867 F DEBUG : #49 pc 00000000005610fc /system/lib64/libart.so (art_quick_to_interpreter_bridge+92)
06-29 13:10:15.271 4867 4867 F DEBUG : #50 pc 0000000000557f88 /system/lib64/libart.so (art_quick_invoke_stub+584)
06-29 13:10:15.271 4867 4867 F DEBUG : #51 pc 00000000000cfcc8 /system/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+200)
06-29 13:10:15.271 4867 4867 F DEBUG : #52 pc 000000000045e444 /system/lib64/libart.so (art::(anonymous namespace)::InvokeWithArgArray(art::ScopedObjectAccessAlreadyRunnable const&, art::ArtMethod*, art::(anonymous namespace)::ArgArray*, art::JValue*, char const*)+104)
06-29 13:10:15.271 4867 4867 F DEBUG : #53 pc 000000000045f500 /system/lib64/libart.so (art::InvokeVirtualOrInterfaceWithJValues(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jmethodID*, jvalue*)+424)
06-29 13:10:15.271 4867 4867 F DEBUG : #54 pc 000000000048a920 /system/lib64/libart.so (art::Thread::CreateCallback(void*)+1120)
06-29 13:10:15.271 4867 4867 F DEBUG : #55 pc 00000000000919c0 /system/lib64/libc.so (__pthread_start(void*)+36)
06-29 13:10:15.271 4867 4867 F DEBUG : #56 pc 0000000000023fb0 /system/lib64/libc.so (__start_thread+68)
解決：
這個問題一般是某個對象的指針 Double Free 所致，檢查下某個指針所指向的內存是否被重複釋放了。