正确姿势使用arm-linux-androideabi-addr2line

前言

arm-linux-androideabi-addr2line是NDK中提供的将内存地址转换成行号的一个工具，通俗具体点就是根据各种日志，譬如trace日志和tomestone日志中包含的so库日志的中偏移内存地址，定位到具体是在那个文件的那一行。下面跟着我，一起学正确使用姿势。

一.命令使用方法

xxx$ arm-linux-androideabi-addr2line  --h
Usage: arm-linux-androideabi-addr2line [option(s)] [addr(s)]Convert addresses into line number/file name pairs.If no addresses are specified on the command line, they will be read from stdinThe options are:@<file>                Read options from <file>-a --addresses         Show addresses-b --target=<bfdname>  Set the binary file format-e --exe=<executable>  Set the input file name (default is a.out)-i --inlines           Unwind inlined functions-j --section=<name>    Read section-relative offsets instead of addresses-p --pretty-print      Make the output easier to read for humans-s --basenames         Strip directory names-f --functions         Show function names-C --demangle[=style]  Demangle function names-h --help              Display this information-v --version           Display the program's versionarm-linux-androideabi-addr2line: supported targets: elf32-littlearm elf32-bigarm elf32-little elf32-big plugin srec symbolsrec verilog tekhex binary ihex
Report bugs to <http://source.android.com/source/report-bugs.html>下面让我来中文翻译一下：
命令格式：
arm-linux-androideabi-addr2line -e 需要调试的so库路径 内存地址

addr2line的工具在NDK和Android源码中都有集成，这里我以Android源码为演示，通过搜索可以发现很多的addr2line文件，我们需要选择适合自己的，我们这里使用的是arm-linux-androideabi-addr2line。

xxx$ find .  -name *addr2line*
./external/elfutils/0.153/src/addr2line.c
./external/mesa3d/src/gallium/tools/addr2line.sh
./external/chromium_org/build/android/pylib/symbols/mock_addr2line
./external/chromium_org/build/android/pylib/symbols/mock_addr2line/mock_addr2line
./external/chromium_org/third_party/tcmalloc/chromium/src/windows/addr2line-pdb.c
./external/chromium_org/third_party/tcmalloc/vendor/src/windows/addr2line-pdb.c
./external/chromium_org/third_party/tcmalloc/vendor/vsprojects/addr2line-pdb
./external/chromium_org/third_party/tcmalloc/vendor/vsprojects/addr2line-pdb/addr2line-pdb.vcproj
./external/chromium_org/third_party/mesa/src/src/gallium/tools/addr2line.sh
./ndk/sources/host-tools/ndk-stack/binutils/addr2line.c
./prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-addr2line
./prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.8/bin/aarch64-linux-android-addr2line
./prebuilts/gcc/darwin-x86/arm/arm-linux-androideabi-4.8/bin/arm-linux-androideabi-addr2line
./prebuilts/gcc/darwin-x86/arm/arm-eabi-4.8/bin/arm-eabi-addr2line
./prebuilts/gcc/darwin-x86/mips/mips64el-linux-android-4.9/bin/mips64el-linux-android-addr2line
./prebuilts/gcc/darwin-x86/mips/mipsel-linux-android-4.8/bin/mipsel-linux-android-addr2line
./prebuilts/gcc/darwin-x86/mips/mips64el-linux-android-4.8/bin/mips64el-linux-android-addr2line
./prebuilts/gcc/darwin-x86/x86/x86_64-linux-android-4.8/bin/x86_64-linux-android-addr2line
./prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-addr2line
./prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.8/bin/aarch64-linux-android-addr2line
./prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/bin/x86_64-linux-addr2line
./prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/bin/x86_64-linux-addr2line
./prebuilts/gcc/linux-x86/host/x86_64-w64-mingw32-4.8/bin/x86_64-w64-mingw32-addr2line
./prebuilts/gcc/linux-x86/host/x86_64-w64-mingw32-4.8/share/man/man1/x86_64-w64-mingw32-addr2line.1
./prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.8/bin/arm-linux-androideabi-addr2line
./prebuilts/gcc/linux-x86/arm/arm-eabi-4.8/bin/arm-eabi-addr2line
./prebuilts/gcc/linux-x86/mips/mips64el-linux-android-4.9/bin/mips64el-linux-android-addr2line
./prebuilts/gcc/linux-x86/mips/mipsel-linux-android-4.8/bin/mipsel-linux-android-addr2line
./prebuilts/gcc/linux-x86/mips/mips64el-linux-android-4.8/bin/mips64el-linux-android-addr2line
./prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.8/bin/x86_64-linux-android-addr2line
./prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin/x86_64-linux-android-addr2line
./prebuilts/tools/gcc-sdk/addr2line
xxx$

同时在Android源码中source build/envsetup.sh和lunch以后，我们输入如下命令发现Android可以为我们补齐：

xxx$ arm-linux-androideabi-
arm-linux-androideabi-addr2line   arm-linux-androideabi-elfedit     arm-linux-androideabi-gcc-ranlib  arm-linux-androideabi-ld.gold     arm-linux-androideabi-size
arm-linux-androideabi-ar          arm-linux-androideabi-g++         arm-linux-androideabi-gcov        arm-linux-androideabi-nm          arm-linux-androideabi-strings
arm-linux-androideabi-as          arm-linux-androideabi-gcc         arm-linux-androideabi-gdb         arm-linux-androideabi-objcopy     arm-linux-androideabi-strip
arm-linux-androideabi-c++         arm-linux-androideabi-gcc-4.8     arm-linux-androideabi-gprof       arm-linux-androideabi-objdump
arm-linux-androideabi-c++filt     arm-linux-androideabi-gcc-ar      arm-linux-androideabi-ld          arm-linux-androideabi-ranlib
arm-linux-androideabi-cpp         arm-linux-androideabi-gcc-nm      arm-linux-androideabi-ld.bfd      arm-linux-androideabi-readelf

二.实际案例分析

好了，有了前面的铺垫，让我们来一个实际案例分析一把，让我们浪起来。

DALVIK THREADS (23):
"main" prio=5 tid=1 Native| group="main" sCount=1 dsCount=0 obj=0x73698300 self=0xb73b40f0| sysTid=20557 nice=0 cgrp=default sched=0/0 handle=0xb6f15bec| state=S schedstat=( 15160273605 193890933 2101 ) utm=1424 stm=92 core=0 HZ=100| stack=0xbe2fb000-0xbe2fd000 stackSize=8MB| held mutexes=kernel: (couldn't read /proc/self/task/20557/stack)native: #00 pc 0000f9a8  /system/lib/libc.so (syscall+28)native: #01 pc 00013185  /system/lib/libc.so (_Z33__pthread_cond_timedwait_relativeP14pthread_cond_tP15pthread_mutex_tPK8timespec+56)native: #02 pc 0003b2e3  /system/lib/libhwui.so (???)native: #03 pc 0003b319  /system/lib/libhwui.so (???)native: #04 pc 00936c8b  /data/dalvik-cache/arm/system@framework@boot.oat (Java_android_view_ThreadedRenderer_nSyncAndDrawFrame__JJJF+134)at android.view.ThreadedRenderer.nSyncAndDrawFrame(Native method)at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:340)at android.view.ViewRootImpl.draw(ViewRootImpl.java:2548)at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2364)at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1994)at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1073)at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5903)at android.view.Choreographer$CallbackRecord.run(Choreographer.java:773)at android.view.Choreographer.doCallbacks(Choreographer.java:586)at android.view.Choreographer.doFrame(Choreographer.java:556)at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:759)at android.os.Handler.handleCallback(Handler.java:739)at android.os.Handler.dispatchMessage(Handler.java:95)at android.os.Looper.loop(Looper.java:135)at android.app.ActivityThread.main(ActivityThread.java:5259)at java.lang.reflect.Method.invoke!(Native method)at java.lang.reflect.Method.invoke(Method.java:372)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:902)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:697)

我们这里以#03为例进行分析，具体步骤如下：
(1) 找到没有优化的libhwui.so文件，当然是通过find了，如下

xxx$ find .  -name libhwui.so
./out/target/product/msm8909/system/lib/libhwui.so
./out/target/product/msm8909/obj/SHARED_LIBRARIES/libhwui_intermediates/LINKED/libhwui.so
./out/target/product/msm8909/obj/lib/libhwui.so
./out/target/product/msm8909/symbols/system/lib/libhwui.so  //这个是我么要使用的

(2) 找到内存地址“0003b319”
(3) 执行命令

xxx$ arm-linux-androideabi-addr2line -f -e  ./out/target/product/msm8909/symbols/system/lib/libhwui.so  0003b319
_ZN7android10uirenderer12renderthread13DrawFrameTask9drawFrameExx
xxx/frameworks/base/libs/hwui/renderthread/DrawFrameTask.cpp:77
xxx$

可以看到上面已经定位到了具体的行数了，就是这么简单丝滑。

总结

除了arm-linux-androideabi-addr2line找崩溃位置，Android的妈咪谷歌还我们提供了其它的功能，我们还可以用其它功能,所以说Android是一个大宝贝更多的功能等着我们去挖掘。
(1)输出动态so所有函数

   arm-linux-androideabi-readelf -a XX.so  > xx.txt

(2)反汇编so包

arm-linux-androideabi-objdump -dx XX.so > xx.txt