Android NDK tombstone分析工具

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在Andoird Native库发生异常的时候，Linux会发生不同级别的sig，来结构相关进程的运行，同时会产生tombstone trace文件用于记录发生崩溃寄存器和堆栈的状态。

这里面的涉及的知识点很多，但该文主要是介绍一下这种情况debug的工具stack.py。

1，keypoint

a,Android sig/进程间通讯

b,Linux 内存管理/ 用户空间和内核空间

c,Arm汇编
d,Android库的链接Linker

2，tombstone的结构大概如下

1 *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***2 Build fingerprint: 'MBX/k200/k200:4.4.2/KOT49H/20140717:user/test-keys'3 Revision: '11'4 pid: 455, tid: 486, name: InputDispatcher  >>> system_server <<<5 signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 002902386     r0 00290008  r1 00000230  r2 00000003  r3 002900087     r4 64a42042  r5 677d9eac  r6 677f16e8  r7 000003f28     r8 41656d40  r9 00000002  sl 00000000  fp 68088ca09     ip 000000f2  sp 68088b38  lr 00000000  pc 4165a9d8  cpsr 200b001010     d0  677d9fd84b000000  d1  626e40280001000011     d2  002e00640069006f  d3  00650074006e006912     d4  006c0061006e0072  d5  006c006f0070002e13     d6  002e007900630069  d7  00790065004b004914     d8  0000000000000000  d9  000000000000000015     d10 0000000000000000  d11 000000000000000016     d12 0000000000000000  d13 000000000000000017     d14 0000000000000000  d15 000000000000000018     d16 3d5e000000000000  d17 3d5e00000000000019     d18 408f400000000000  d19 41168cb34000000020     d20 4020f5c28f5c28f6  d21 408a80000000000021     d22 40b4c3e100000000  d23 3ff000000000000022     d24 41f2a05f20000000  d25 40b388000000000023     d26 408a800000000000  d27 405300000000000024     d28 0000000000000000  d29 000000000000000025     d30 0100010001000100  d31 010001000100010026     scr 2000001027  28 backtrace:29     #00  pc 000219d8  /system/lib/libdvm.so30     #01  pc 0002dfa0  /system/lib/libdvm.so (dvmMterpStd(Thread*)+76)31     #02  pc 0002b638  /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)32     #03  pc 00060581  /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+336)33     #04  pc 0004c9cd  /system/lib/libdvm.so34     #05  pc 00009de9  /system/lib/libandroid_servers.so35     #06  pc 0000a2b7  /system/lib/libandroid_servers.so (android::NativeInputManager::interceptKeyBeforeDispatching(android::sp<android::InputWindowHandle> const&, android::KeyEvent const*, unsigned int)+58)36     #07  pc 00020a49  /system/lib/libinputservice.so (android::InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible(android::InputDispatcher::CommandEntry*)+60)37     #08  pc 00022487  /system/lib/libinputservice.so (android::InputDispatcher::runCommandsLockedInterruptible()+58)38     #09  pc 0002571b  /system/lib/libinputservice.so (android::InputDispatcher::dispatchOnce()+50)39     #10  pc 0001fb61  /system/lib/libinputservice.so (android::InputDispatcherThread::threadLoop()+8)40     #11  pc 0000e9ed  /system/lib/libutils.so (android::Thread::_threadLoop(void*)+104)41     #12  pc 0004d4b1  /system/lib/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+68)42     #13  pc 0000e58f  /system/lib/libutils.so43     #14  pc 0000d200  /system/lib/libc.so (__thread_entry+72)44     #15  pc 0000d398  /system/lib/libc.so (pthread_create+240)45  

其中backtrace就是当时system_server接收到signal 11时，堆栈调用的信息，这些信息很重要，能帮忙还原发生异常的现场。signal 11的定义在这里$android_root/prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.7-4.6/sysroot/usr/include/bits/signum.h

1 /* Signals.  */2 #define    SIGHUP        1    /* Hangup (POSIX).  */3 #define    SIGINT        2    /* Interrupt (ANSI).  */4 #define    SIGQUIT        3    /* Quit (POSIX).  */5 #define    SIGILL        4    /* Illegal instruction (ANSI).  */6 #define    SIGTRAP        5    /* Trace trap (POSIX).  */7 #define    SIGABRT        6    /* Abort (ANSI).  */8 #define    SIGIOT        6    /* IOT trap (4.2 BSD).  */9 #define    SIGBUS        7    /* BUS error (4.2 BSD).  */10 #define    SIGFPE        8    /* Floating-point exception (ANSI).  */11 #define    SIGKILL        9    /* Kill, unblockable (POSIX).  */12 #define    SIGUSR1        10    /* User-defined signal 1 (POSIX).  */13 #define    SIGSEGV        11    /* Segmentation violation (ANSI).  */14 #define    SIGUSR2        12    /* User-defined signal 2 (POSIX).  */15 #define    SIGPIPE        13    /* Broken pipe (POSIX).  */16 #define    SIGALRM        14    /* Alarm clock (POSIX).  */17 #define    SIGTERM        15    /* Termination (ANSI).  */18 #define    SIGSTKFLT    16    /* Stack fault.  */19 #define    SIGCLD        SIGCHLD    /* Same as SIGCHLD (System V).  */20 #define    SIGCHLD        17    /* Child status has changed (POSIX).  */21 #define    SIGCONT        18    /* Continue (POSIX).  */22 #define    SIGSTOP        19    /* Stop, unblockable (POSIX).  */23 #define    SIGTSTP        20    /* Keyboard stop (POSIX).  */24 #define    SIGTTIN        21    /* Background read from tty (POSIX).  */25 #define    SIGTTOU        22    /* Background write to tty (POSIX).  */26 #define    SIGURG        23    /* Urgent condition on socket (4.2 BSD).  */27 #define    SIGXCPU        24    /* CPU limit exceeded (4.2 BSD).  */28 #define    SIGXFSZ        25    /* File size limit exceeded (4.2 BSD).  */29 #define    SIGVTALRM    26    /* Virtual alarm clock (4.2 BSD).  */30 #define    SIGPROF        27    /* Profiling alarm clock (4.2 BSD).  */31 #define    SIGWINCH    28    /* Window size change (4.3 BSD, Sun).  */32 #define    SIGPOLL        SIGIO    /* Pollable event occurred (System V).  */33 #define    SIGIO        29    /* I/O now possible (4.2 BSD).  */34 #define    SIGPWR        30    /* Power failure restart (System V).  */35 #define SIGSYS        31    /* Bad system call.  */36 #define SIGUNUSED    31

stack.py工具就是要把backtrace通过addr2line工具一次性把15个addr对应到代码。

先看一下帮助，在主机上执行

python stack.py --help

1 build/core/envsetup.mk:10: /version_defaults.mk: No such file or directory2 build/core/envsetup.mk:115: /product_config.mk: No such file or directory3 make: *** No rule to make target `/product_config.mk'.  Stop.4  5   usage: stack.py [options] [FILE]6  7   --symbols-dir=path8        the path to a symbols dir, such as =/tmp/out/target/product/dream/symbols9  10   --symbols-zip=path11        the path to a symbols zip file, such as =dream-symbols-12345.zip12  13   --auto14        attempt to:15          1) automatically find the build number in the crash16          2) if it's an official build, download the symbols 17             from the build server, and use them18  19   FILE should contain a stack trace in it somewhere20        the tool will find that and re-print it with21        source files and line numbers.  If you don't22        pass FILE, or if file is -, it reads from23        stdin.

tombstone生成文件一般位于手机中/data/tombstone/文件夹下面，工具使用如下：

1 python stack.py --symbols-dir=out/target/product/$yourproduct/symbols/ tombstone-00 

1 Searching for native crashes in tombstone-07182 Reading symbols from out/target/product/k200/symbols/3 pid: 455, tid: 486, name: InputDispatcher  >>> system_server <<<4 signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 002902385     r0 00290008  r1 00000230  r2 00000003  r3 002900086     r4 64a42042  r5 677d9eac  r6 677f16e8  r7 000003f27     r8 41656d40  r9 00000002  sl 00000000  fp 68088ca08     ip 000000f2  sp 68088b38  lr 00000000  pc 4165a9d89  10 Stack Trace:11   ADDR      FUNCTION                                                                                                                                            FILE:LINE12   000219d8  dalvik_inst                                                                                                                                         /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/dalvik/vm/mterp/out/InterpAsm-armv7-a-neon.S:735813   0002dfa0  dvmMterpStd(Thread*)                                                                                                                                /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/dalvik/vm/mterp/Mterp.cpp:10514   0002b638  dvmInterpret(Thread*, Method const*, JValue*)                                                                                                       /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/dalvik/vm/interp/Interp.cpp:196115   00060581  dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)                                                                      /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/dalvik/vm/interp/Stack.cpp:52616   0004c9cd  CallLongMethodV                                                                                                                                     /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/dalvik/vm/Jni.cpp:196817   00009de9  _JNIEnv::CallLongMethod(_jobject*, _jmethodID*, ...)                                                                                                /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/libnativehelper/include/nativehelper/jni.h:62518   0000a2b7  android::NativeInputManager::interceptKeyBeforeDispatching(android::sp<android::InputWindowHandle> const&, android::KeyEvent const*, unsigned int)  /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/frameworks/base/services/jni/com_android_server_input_InputManagerService.cpp:93819   00020a49  android::InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible(android::InputDispatcher::CommandEntry*)                               /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/frameworks/base/services/input/InputDispatcher.cpp:347820   00022487  android::InputDispatcher::runCommandsLockedInterruptible()                                                                                          /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/frameworks/base/services/input/InputDispatcher.cpp:615 (discriminator 3)21   0002571b  android::InputDispatcher::dispatchOnce()                                                                                                            /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/frameworks/base/services/input/InputDispatcher.cpp:23722   0001fb61  android::InputDispatcherThread::threadLoop()                                                                                                        /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/frameworks/base/services/input/InputDispatcher.cpp:448423   0000e9ed  android::Thread::_threadLoop(void*)                                                                                                                 /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/system/core/libutils/Threads.cpp:77024   0004d4b1  android::AndroidRuntime::javaThreadShell(void*)                                                                                                     /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/frameworks/base/core/jni/AndroidRuntime.cpp:100025   0000e58f  thread_data_t::trampoline(thread_data_t const*)                                                                                                     /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/system/core/libutils/Threads.cpp:9526   0000d200  __thread_entry                                                                                                                                      /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/bionic/libc/bionic/pthread_create.cpp:10527   0000d398  pthread_create                                                                                                                                      /mnt/nfsroot/gangfeng.xu/work/kk-amlogic-dev/bionic/libc/bionic/pthread_create.cpp:224

很方便吧,不用一个一个的去找了。

工具链接如下：

stack.py

refer to:
https://sites.google.com/a/itspaclub.com/www/android-debug/7-how-to-debug-native-code
http://stackoverflow.com/questions/5106581/how-to-get-longer-stacktrace-tombstone-from-android
http://blog.csdn.net/helldevil/article/details/6682211

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