Android——DEBUG 堆棧

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      當android系統執行出現死機等致命錯誤的時候。通常會有堆棧的DEBUG資訊列印，一般直接看根本看不出問題是出在哪裡！記錄下我android4.2 的DEBUG 堆棧log的方法.

                                                                   

                                                                        撰寫不易，轉載請註明出處：http://blog.csdn.net/jscese/article/details/38232667

一.DEBUG log

這是我出現錯誤的堆棧資訊：

01-01 08:00:03.376 I/DEBUG   (  929):     r0 0000000e  r1 00000000  r2 00000002  r3 0000000001-01 08:00:03.376 I/DEBUG   (  929):     r4 404cd890  r5 00000002  r6 00000000  r7 0000000e01-01 08:00:03.376 I/DEBUG   (  929):     r8 404ccddc  r9 404cd414  sl 404cd414  fp 404cd89401-01 08:00:03.376 I/DEBUG   (  929):     ip 00000073  sp 404ccd20  lr 4012aec1  pc 40124570  cpsr 2000001001-01 08:00:03.376 I/DEBUG   (  929):     d0  7664206e69207961  d1  656c646e6168202001-01 08:00:03.376 I/DEBUG   (  929):     d2  6f69746974726150  d3  332064656464416e01-01 08:00:03.376 I/DEBUG   (  929):     d4  30636d6d2f30636d  d5  6c622f313030303a01-01 08:00:03.376 I/DEBUG   (  929):     d6  62636d6d2f6b636f  d7  62636d6d2f306b6c01-01 08:00:03.376 I/DEBUG   (  929):     d8  0000000000000000  d9  000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d10 0000000000000000  d11 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d12 0000000000000000  d13 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d14 0000000000000000  d15 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d16 000000000c7f0000  d17 000000000c80000001-01 08:00:03.376 I/DEBUG   (  929):     d18 4163fc8780000000  d19 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d20 0000000000000000  d21 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d22 0000000000000000  d23 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d24 0000000000000000  d25 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d26 0000000000000000  d27 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d28 0000000000000000  d29 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     d30 0000000000000000  d31 000000000000000001-01 08:00:03.376 I/DEBUG   (  929):     scr 0000001001-01 08:00:03.380 I/DEBUG   (  929): 01-01 08:00:03.380 I/DEBUG   (  929): backtrace:01-01 08:00:03.380 I/DEBUG   (  929):     #00  pc 00019570  /system/lib/libc.so (strlen+16)01-01 08:00:03.380 I/DEBUG   (  929):     #01  pc 0001febd  /system/lib/libc.so (__vfprintf+2124)01-01 08:00:03.380 I/DEBUG   (  929):     #02  pc 00021303  /system/lib/libc.so (vsnprintf+70)01-01 08:00:03.380 I/DEBUG   (  929):     #03  pc 0000139d  /system/lib/liblog.so (__android_log_buf_print+44)01-01 08:00:03.380 I/DEBUG   (  929):     #04  pc 0000cfd7  /system/bin/vold01-01 08:00:03.380 I/DEBUG   (  929): 01-01 08:00:03.380 I/DEBUG   (  929): stack:01-01 08:00:03.380 I/DEBUG   (  929):          404ccce0  404cd474  01-01 08:00:03.380 I/DEBUG   (  929):          404ccce4  40128f73  /system/lib/libc.so01-01 08:00:03.380 I/DEBUG   (  929):          404ccce8  404cd414  01-01 08:00:03.380 I/DEBUG   (  929):          404cccec  404ccd98  01-01 08:00:03.380 I/DEBUG   (  929):          404cccf0  00000000  01-01 08:00:03.380 I/DEBUG   (  929):          404cccf4  404ccd98  01-01 08:00:03.380 I/DEBUG   (  929):          404cccf8  00000001  01-01 08:00:03.384 I/DEBUG   (  929):          404cccfc  4001d821  /system/bin/vold01-01 08:00:03.384 I/DEBUG   (  929):          404ccd00  0000002d  01-01 08:00:03.384 I/DEBUG   (  929):          404ccd04  404ccddc  01-01 08:00:03.384 I/DEBUG   (  929):          404ccd08  404cd414  01-01 08:00:03.384 I/DEBUG   (  929):          404ccd0c  ffffffff  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd10  00000001  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd14  4012a667  /system/lib/libc.so01-01 08:00:03.388 I/DEBUG   (  929):          404ccd18  df0027ad  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd1c  00000000  01-01 08:00:03.388 I/DEBUG   (  929):     #00  404ccd20  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          ........  ........01-01 08:00:03.388 I/DEBUG   (  929):     #01  404ccd20  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd24  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd28  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd2c  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd30  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd34  00000073  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd38  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd3c  ffffffff  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd40  404ccddc  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd44  4001d85a  /system/bin/vold01-01 08:00:03.388 I/DEBUG   (  929):          404ccd48  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd4c  00000034  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd50  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd54  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404ccd58  4001d824  /system/bin/vold01-01 08:00:03.388 I/DEBUG   (  929):          404ccd5c  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          ........  ........01-01 08:00:03.388 I/DEBUG   (  929):     #02  404cd400  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404cd404  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404cd408  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404cd40c  00000000  01-01 08:00:03.388 I/DEBUG   (  929):          404cd410  00004000  01-01 08:00:03.388 I/DEBUG   (  929):          404cd414  404cd474  01-01 08:00:03.388 I/DEBUG   (  929):          404cd418  4014d498  /system/lib/libc.so01-01 08:00:03.388 I/DEBUG   (  929):          404cd41c  000003ff  01-01 08:00:03.388 I/DEBUG   (  929):          404cd420  ffff0208  [vectors]01-01 08:00:03.388 I/DEBUG   (  929):          404cd424  404cd474  01-01 08:00:03.388 I/DEBUG   (  929):          404cd428  000003ff  01-01 08:00:03.388 I/DEBUG   (  929):          404cd42c  4001d578  /system/bin/vold01-01 08:00:03.388 I/DEBUG   (  929):          404cd430  00000003  01-01 08:00:03.388 I/DEBUG   (  929):          404cd434  404cd474  01-01 08:00:03.388 I/DEBUG   (  929):          404cd438  00000003  01-01 08:00:03.388 I/DEBUG   (  929):          404cd43c  401072a3  /system/lib/liblog.so (__android_log_buf_write+186)01-01 08:00:03.388 I/DEBUG   (  929):          ........  ........01-01 08:00:03.392 I/DEBUG   (  929): 01-01 08:00:03.392 I/DEBUG   (  929): memory near r4:01-01 08:00:03.392 I/DEBUG   (  929):     404cd870 404cdb7c 689886ea 40021d88 404cd8b4  01-01 08:00:03.392 I/DEBUG   (  929):     404cd880 404cd9fc 404cdb7c 40010fdb 4001d824  01-01 08:00:03.392 I/DEBUG   (  929):     404cd890 0000000e 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd8a0 00000000 40584a00 40584af8 40584be8  01-01 08:00:03.392 I/DEBUG   (  929):     404cd8b0 00000000 0000000e 000000b3 0000000e  01-01 08:00:03.392 I/DEBUG   (  929):     404cd8c0 40584bb6 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd8d0 401815fc 000000f9 000000c0 000000bf  01-01 08:00:03.392 I/DEBUG   (  929):     404cd8e0 0000655f 40021d88 00000001 40129b39  01-01 08:00:03.392 I/DEBUG   (  929):     404cd8f0 404cd968 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd900 00004000 404cd9f0 00000000 7fffffdb  01-01 08:00:03.392 I/DEBUG   (  929):     404cd910 ffff0208 689886ea 7fffffff 689886ea  01-01 08:00:03.392 I/DEBUG   (  929):     404cd920 00000000 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd930 00000000 00000000 404cda0c 404cd9fc  01-01 08:00:03.392 I/DEBUG   (  929):     404cd940 404cdb7c 4057217c 40572158 40021d88  01-01 08:00:03.392 I/DEBUG   (  929):     404cd950 00000001 40129aeb 404cd9cc 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd960 404cd9d4 00000000 00000000 404cda60  01-01 08:00:03.392 I/DEBUG   (  929): 01-01 08:00:03.392 I/DEBUG   (  929): memory near r8:01-01 08:00:03.392 I/DEBUG   (  929):     404ccdbc 00000000 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404ccdcc 00000000 00000000 4001d824 00000034  01-01 08:00:03.392 I/DEBUG   (  929):     404ccddc 00000000 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404ccdec 00000000 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404ccdfc 00000000 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cce0c 00000000 00000000 00000000 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cce1c 00000000 404cd60f 40128f73 404cd5ed  01-01 08:00:03.392 I/DEBUG   (  929):     404cce2c 40128f73 404cd55c 404ccee0 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cce3c 404ccee0 00000002 4001d68f 00000001  01-01 08:00:03.392 I/DEBUG   (  929):     404cce4c 404ccf24 404cd55c ffffffff fffffff7  01-01 08:00:03.392 I/DEBUG   (  929):     404cce5c 4012a667 404cd9dc 4012b88d 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cce6c 00000000 00000000 00000073 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cce7c 00000073 00000008 00000000 00000009  01-01 08:00:03.392 I/DEBUG   (  929):     404cce8c 4001d68e 00000000 00000032 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cce9c 00000000 4001d664 00000000 4014d498  01-01 08:00:03.392 I/DEBUG   (  929):     404cceac 4014d4a8 00000000 40156228 00000000  01-01 08:00:03.392 I/DEBUG   (  929): 01-01 08:00:03.392 I/DEBUG   (  929): memory near r9:01-01 08:00:03.392 I/DEBUG   (  929):     404cd3f4 40021d88 00000001 4012c307 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd404 00000000 00000000 00000000 00004000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd414 404cd474 4014d498 000003ff ffff0208  01-01 08:00:03.392 I/DEBUG   (  929):     404cd424 404cd474 000003ff 4001d578 00000003  01-01 08:00:03.392 I/DEBUG   (  929):     404cd434 404cd474 00000003 401072a3 00000000  01-01 08:00:03.392 I/DEBUG   (  929):     404cd444 404cd404 404cd444 00000001 4001d578  01-01 08:00:03.396 I/DEBUG   (  929):     404cd454 0000000d 404cd474 0000002e 40156228  01-01 08:00:03.396 I/DEBUG   (  929):     404cd464 4001d578 40156228 401073a1 404cd890  01-01 08:00:03.396 I/DEBUG   (  929):     404cd474 6563736a 64206573 6c707369 69207961  01-01 08:00:03.396 I/DEBUG   (  929):     404cd484 7664206e 61682020 656c646e 74726150  01-01 08:00:03.396 I/DEBUG   (  929):     404cd494 6f697469 6464416e 33206465 0000000a  01-01 08:00:03.396 I/DEBUG   (  929):     404cd4a4 00000000 00000000 38663735 62353536  01-01 08:00:03.396 I/DEBUG   (  929):     404cd4b4 00000000 00000000 00000000 00000000  01-01 08:00:03.396 I/DEBUG   (  929):     404cd4c4 00000000 00000000 00000000 00000000  01-01 08:00:03.396 I/DEBUG   (  929):     404cd4d4 00000000 00000000 00000000 00000000  01-01 08:00:03.396 I/DEBUG   (  929):     404cd4e4 00000000 00000000 00000000 00000000 

須要分析上面的DEBUG，僅僅須要提取一部分內容然後儲存到一個 txt 文本裡面，提取例如以下內容：

#00  pc 00019570  /system/lib/libc.so#01  pc 0001febd  /system/lib/libc.so#02  pc 00021303  /system/lib/libc.so#03  pc 0000139d  /system/lib/liblog.so#04  pc 0000caa9  /system/bin/vold

儲存到error.txt,須要注意儲存內容的間隔對齊。

二.python

須要一個分析上面提取出來的error.txt  DEBUG 資訊 DEBUG.py：

#!/usr/bin/python# stack symbol parserimport osimport stringimport sys#define android product nameANDROID_PRODUCT_NAME = 'gotechcn'ANDROID_WORKSPACE = os.getcwd()+"/"# addr2line tool path and symbol pathaddr2line_tool = ANDROID_WORKSPACE + 'prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/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 resultclass 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.argvif 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])

這個python指令碼是google提供的，用來分析DEBUG，須要注意的是配置自己相相應的ANDROID_PRODUCT_NAME，用來在你的android原始碼裡面找相應的工具。我的product_name 為 “gotechcn”。

addr2line_tool 的路徑各個android 版本號碼可能也有所不同，須要自己依據自己的原始碼進行配置.

我這android4.2 還須要cp OUT/system/lib/egl/libGLES_android.so 到 OUT/system/lib檔案夾下 供上面的指令碼使用

三.解析

在上面兩步做好之後。將DEBUG.py  以及 error.txt  cp 到 android 原始碼的根資料夾下，運行：

python DEBUG.py error.txt

依據我上面的error.txt 可得到例如以下結果：

read file okstrlen.c:52                   strlenstring.h:221                  strlenvsnprintf.c:61                vsnprintfstdio.h:490                   __android_log_buf_printDirectVolume.cpp:291          DirectVolume::handleDiskChanged(char const*, NetlinkEvent*)

這就是出問題的根源，可依據這個DEBUG

Android——DEBUG 堆棧