Android下调试.so库类的bug

在android开发过程中，经常出现运行写的程序后机子立马死机，然后打了一堆不认识的log，如下所示：

 I/DEBUG   (  161): Build fingerprint: 'unknown'
 I/DEBUG   (  161): pid: 758, tid: 765  >>> com.oppo.wallpaper <<<
 I/DEBUG   (  161): signal 11 (SIGSEGV), fault addr 49f23000
 I/DEBUG   (  161):  r0 4a1ba240  r1 49f22ff8  r2 000006a0  r3 00000000
 I/DEBUG   (  161):  r4 00000000  r5 00000000  r6 00000960  r7 00000001
 I/DEBUG   (  161):  r8 00100000  r9 a9e169b5  10 49e23000  fp 49f22e48
 I/DEBUG   (  161):  ip 80f09130  sp 49f22aa0  lr 80f02828  pc afd0f1ec  cpsr 20000010
 I/DEBUG   (  161):  d0  643a64696f72646e  d1  6472656767756265
 I/DEBUG   (  161):  d2  0000000000000000  d3  0000000000000000
 I/DEBUG   (  161):  d4  0000000000000000  d5  0000000000000000
 I/DEBUG   (  161):  d6  0000000000000000  d7  0000000000000000
 I/DEBUG   (  161):  d8  0000000000000000  d9  0000000000000000
 I/DEBUG   (  161):  d10 0000000000000000  d11 0000000000000000
 I/DEBUG   (  161):  d12 0000000000000000  d13 0000000000000000
 I/DEBUG   (  161):  d14 0000000000000000  d15 0000000000000000
 I/DEBUG   (  161):  d16 0000000000000000  d17 beb1bcce06c829e8
 I/DEBUG   (  161):  d18 bf29ff2fd6cab8b8  d19 3ec6cd878c3b46a7
 I/DEBUG   (  161):  d20 bf6681d6ffb6f084  d21 3f3937f8a97fa389
 I/DEBUG   (  161):  d22 3fcdee92c0000000  d23 3ef99342e0ee5069
 I/DEBUG   (  161):  d24 3ef99342e0ee5069  d25 be3dd3baa0000000
 I/DEBUG   (  161):  d26 be3dd3baa0000000  d27 3ef99342e0ee5069
 I/DEBUG   (  161):  d28 0000000000000000  d29 0000000000000000
 I/DEBUG   (  161):  d30 0000000000000000  d31 0000000000000000
 I/DEBUG   (  161):  scr 80000013
 I/DEBUG   (  161):
 I/DEBUG   (  161):          #00  pc 0000f1ec  /system/lib/libc.so
 I/DEBUG   (  161):          #01  pc 00002824  /system/lib/libgsl.so
 I/DEBUG   (  161):          #02  pc 00088e8c  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #03  pc 00090f94  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #04  pc 0005f8e2  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #05  pc 000623ca  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #06  pc 00082622  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #07  pc 00020772  /system/lib/libRS.so
 I/DEBUG   (  161):          #08  pc 000207be  /system/lib/libRS.so
 I/DEBUG   (  161):          #09  pc 0001f4dc  /system/lib/libRS.so
 I/DEBUG   (  161):
 I/DEBUG   (  161): code around pc:
 I/DEBUG   (  161): afd0f1cc f5d1f000 f5d1f020 e2522040 3a000009
 I/DEBUG   (  161): afd0f1dc f5d1f040 f5d1f060 f5d1f080 f421020d
 I/DEBUG   (  161): afd0f1ec f421420d f5d1f080 e2522040 f400022d
 I/DEBUG   (  161): afd0f1fc f400422d 2afffff8 e2822040 e2522020
 I/DEBUG   (  161): afd0f20c 3a000003 f421020d e2522020 f400022d
 I/DEBUG   (  161):
 I/DEBUG   (  161): code around lr:
 I/DEBUG   (  161): 80f02808 e5901008 e0836005 e1560001 8a000006
 I/DEBUG   (  161): 80f02818 e5903000 e1a0100c e0830005 eb00099c
 I/DEBUG   (  161): 80f02828 e1a00004 e28dd008 e8bd8070 e59f004c
 I/DEBUG   (  161): 80f02838 e1a02005 e59fc048 e58d1000 e79e0000
 I/DEBUG   (  161): 80f02848 e08e100c e28000a8 ebffff44 e3e00000
 I/DEBUG   (  161):
 I/DEBUG   (  161): stack:
 I/DEBUG   (  161):     49f22a60  0028a9a0  [heap]
 I/DEBUG   (  161):     49f22a64  002f0d68  [heap]
 I/DEBUG   (  161):     49f22a68  00000004
 I/DEBUG   (  161):     49f22a6c  81a5f8e7  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):     49f22a70  00000000
 I/DEBUG   (  161):     49f22a74  81b9b26c  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):     49f22a78  00000000
 I/DEBUG   (  161):     49f22a7c  afd102e4  /system/lib/libc.so
 I/DEBUG   (  161):     49f22a80  afd4373c  /system/lib/libc.so
 I/DEBUG   (  161):     49f22a84  00000050
 I/DEBUG   (  161):     49f22a88  002f1170  [heap]
 I/DEBUG   (  161):     49f22a8c  81bc8740  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):     49f22a90  00100000  [heap]
 I/DEBUG   (  161):     49f22a94  a9e169b5  /system/lib/libRS.so
 I/DEBUG   (  161):     49f22a98  df002777
 I/DEBUG   (  161):     49f22a9c  e3a070ad
 I/DEBUG   (  161): #00 49f22aa0  4a1b9fc0  /dev/zero (deleted)
 I/DEBUG   (  161):     49f22aa4  80f02828  /system/lib/libgsl.so
 I/DEBUG   (  161): #01 49f22aa8  00281c40  [heap]
 I/DEBUG   (  161):     49f22aac  00000960
 I/DEBUG   (  161):     49f22ab0  002f1170  [heap]
 I/DEBUG   (  161):     49f22ab4  0028a9a0  [heap]
 I/DEBUG   (  161):     49f22ab8  002f118c  [heap]
 I/DEBUG   (  161):     49f22abc  81a88e8f  /system/lib/egl/libGLESv2_adreno200.so

咋一看，好多七七八八的数字，以及很多的.so库文件，其实这个就是程序运行过程中函数调用在堆栈中的地址信息，直接通过那些地址我们是无法得知错误出在哪里，不过我们可以有种方式直接告诉我们是在调用库文件里面的哪个函数处出了问题。具体如下：

1.首先取以上log信息中的从#00开始连续的那一部分，保存为error.txt(文档名可以随便取)

 I/DEBUG   (  161):          #00  pc 0000f1ec  /system/lib/libc.so
 I/DEBUG   (  161):          #01  pc 00002824  /system/lib/libgsl.so
 I/DEBUG   (  161):          #02  pc 00088e8c  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #03  pc 00090f94  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #04  pc 0005f8e2  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #05  pc 000623ca  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #06  pc 00082622  /system/lib/egl/libGLESv2_adreno200.so
 I/DEBUG   (  161):          #07  pc 00020772  /system/lib/libRS.so
 I/DEBUG   (  161):          #08  pc 000207be  /system/lib/libRS.so
 I/DEBUG   (  161):          #09  pc 0001f4dc  /system/lib/libRS.so

2.将该txt文档和我附录给的hy.panic.py文件都拷入到android源码的根目录下，之后修改hy.panic.py中的ANDROID_PRODUCT_NAME 为你目前的手机固件名

3.在linux终端中进入源码根目录，然后执行./hy.panic.py  error.txt,完了就会显示在哪个文件的哪行代码调用出问题 ，注意第一个点后面没有空格

有时运行后会出现如下错误：

 read file ok
 /home/android/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin/arm-eabi-addr2line: '/home/android/out/target/product/msm7630_surf/symbols/system/lib/libRS.so': No such file
 Traceback (most recent call last):
   File "./hy.panic.py", line 64, in
     print "%-30s%s" % (list[1],list[0])
 IndexError: list index out of range

此时只需到 /home/android/out/target/product/msm7630_surf/system/lib/下面把libRS.so文件拷贝到 /home/android/out/target/product/msm7630_surf/symbols/system/lib/下面再重新运行即可出现结果

附录：hy.panic.py：

 #!/usr/bin/python
 # stack symbol parser
 import os
 import string
 import sys

 #define android product name
 ANDROID_PRODUCT_NAME = 'msm7630_surf'

 ANDROID_WORKSPACE = os.getcwd()+"/"

 # addr2line tool path and symbol path
 addr2line_tool = ANDROID_WORKSPACE + 'prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin/arm-eabi-addr2line'
 symbol_dir = ANDROID_WORKSPACE + 'out/target/product/' + ANDROID_PRODUCT_NAME +'/symbols'
 symbol_bin = symbol_dir + '/system/bin/'
 symbol_lib = symbol_dir + '/system/lib/'


 class ReadLog:
     def __init__(self,filename):
         self.logname = filename
     def parse(self):
         f = file(self.logname,'r')
         lines = f.readlines()
         if lines != []:
             print 'read file ok'
         else:
             print 'read file failed'
         result =[]
         for line in lines:
             if line.find('stack') != -1:
                 print 'stop search'
                 break
             elif line.find('system') != -1:
                 #print 'find one item' + line
                 result.append(line)
         return result

 class ParseContent:
     def __init__(self,addr,lib):
             self.address = addr # pc address
             self.exename = lib  # executable or shared library
     def addr2line(self):
         cmd = addr2line_tool + " -C -f -s -e " + symbol_dir + self.exename + " " + self.address
         #print cmd
         stream = os.popen(cmd)
         lines = stream.readlines();
         list = map(string.strip,lines)
         return list

 inputarg = sys.argv
 if len(inputarg) < 2:
     print 'Please input panic log'
     exit()

 filename = inputarg[1]
 readlog = ReadLog(filename)
 inputlist = readlog.parse()

 for item in inputlist:
     itemsplit = item.split()
     test = ParseContent(itemsplit[-2],itemsplit[-1])
     list = test.addr2line()
     print "%-30s%s" % (list[1],list[0])