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.so2.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 <module>
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])