Fingeprint.txt

게시 내용은 첨부파일에 넣어 두었습니다. 필요하신 분은 참고하세요.

Android 동작중에 달빅이 리셋되는 경우가 있다.

이 경우 fingerprint 메세지가 나오는데 이것을 분석하는 방법입니다.

우선 fingerprint가 저장된 로그를 저장해 둔다.

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07-14 17:00:05.909: INFO/DEBUG(1198): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

07-14 17:00:05.909: INFO/DEBUG(1198): Build fingerprint: 'XXXXX/XXXX/XXXXX/8x50:2.1-update1/ERE27/eng.xxxxx.20100712.092719:userdebug/test-keys'

07-14 17:00:05.909: INFO/DEBUG(1198): pid: 1354, tid: 2191  >>> system_server <<<

07-14 17:00:05.909: INFO/DEBUG(1198): signal 11 (SIGSEGV), fault addr 00000000

07-14 17:00:05.909: INFO/DEBUG(1198):  r0 00000001  r1 00000007  r2 00000002  r3 0069b920

07-14 17:00:05.909: INFO/DEBUG(1198):  r4 007061b0  r5 00000000  r6 00000001  r7 6d07bb88

07-14 17:00:05.909: INFO/DEBUG(1198):  r8 00100000  r9 6d3647e1  10 38361000  fp 00000000

07-14 17:00:05.909: INFO/DEBUG(1198):  ip 6d07b05c  sp 38460df0  lr 6d035c57  pc 6d035c58  cpsr 20000030

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1. 우선 컴파일 된 경로의 root를 간다. [cmd 창 연다]

 보통 아래 처럼 경로가 있는데 android 상위 폴더에서 처리한다.

Project -

    android

    modem

2. 저장시킬 로그를 project 폴더에 복사한다.

3. "parse_mapfile.pl" 파일을 생성하고 아래 내용을 저정한다.

parse_mapfile.pl

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##########################################################
#
#!/usr/bin/perl
#
# Searches android logfiles for android stack dumps and
# generates a calltrace.
#
# Syntax : perl ./parse_mapfile.pl <logfile> <target> <mydroid root>
#
# <mydroid root> is option and is not needed if calling script
#  from /build folder e.g.
#
#  For emulator builds
#  perl ./scripts/parse_mapfile.pl <logfile> generic
# 
#  For dream builds
#  perl ./scripts/parse_mapfile.pl <logfile> dream
#
#
##########################################################

use strict;

sub findsym;

my $mydroid_root = "../mydroid"; #default
my $logfile = $ARGV[0];
my $target = "generic"; # default emulator

if ($ARGV[1])
{
   $target = $ARGV[1];
}

if ($ARGV[2])
{
   $mydroid_root = $ARGV[2];
}

print("target=$target\n");
print("mydroid_root=$mydroid_root\n");

my $nm="$mydroid_root/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/arm-eabi/bin/nm";
my $sympath = "$mydroid_root/out/target/product/$target/symbols";
my $sympath_alt = "$mydroid_root/out/target/product/$target/";
my $parsing_syms = 0;
my $pos;
my $i;

open LOGFILE, "<", $logfile or die $!;

# Search for stack dump

while (<LOGFILE>)
{
    my($logline) = $_;
    my $search_start="Build fingerprint:";
    my $search_stop="stack:";
    chomp($logline);
       
    $pos++;
    if($logline =~ m/$search_start/)
    {
        print("#######################################################################################\n");
        print("# Found stackdump @ line $pos....generating calltrace\n\n");
        $parsing_syms = 1;
        $i = 0;
    }

    if ($parsing_syms)
    {
        if($logline =~ m/(#.*)pc (.*) (.*)/g)
        {      
            findsym($2, $3);
        }
    }

    if($logline =~ m/$search_stop/)
    {
        $parsing_syms = 0;     
        print("\n#\n#######################################################################################\n"); 
    }
}

sub findsym
{
    my $mapfile = "syms.map";
    my $hprev_sym;
    my $hprev_addr = 0;
    my $hcur_addr;
    my $hcur_sym = 0;
    my $binary=@_[1];
    my $mappath;
    my $symbol = @_[0];
    my $cmd;
    my $prev_sz;
    my @line1;
    my $cur;
    my $offset;
    my $pos = 0;
    my $symfile;
   
    chomp($nm);
    chomp($binary);

    # remove and CR/LF
    $binary =~ s/\r|\n//g;

    $symfile = "$sympath$binary";

    if (! -e $symfile)
    {
        # try alternate location
        $symfile = "$sympath_alt$binary";
        #print("Couldn't find $binary, try alternate path\n");
    }

    if (! -e $symfile)
    {
        print("could not find binary, exit");
        exit 1;
    }
   
    my $my_cmd="$nm $symfile | sort > $mapfile";

    system($my_cmd);

    open MAPFILE, "<", $mapfile or die $!;

    while (<MAPFILE>)  
    {
        my($line) = $_;

        chomp($line);

        # split line on any nbr spaces
        @line1 = split(/ +/, $line);

        # search all code segments
        {
            $hcur_addr = $line1[0];
            $hcur_sym = $line1[2];

            $cur = hex($symbol);
            $a = hex $hprev_addr;
            $b = hex $hcur_addr;
            $prev_sz = $b-$a;

            #print "lr=$cur, a=$a(0x$hprev_addr), b=$b(0x$hcur_addr)\n";

            if (($cur >= $a) && ($cur <= $b))
            {
                $offset = $cur-$a;
                print sprintf("%25s @ 0x%08x (fn pos %04d/%04d) [0x%08x] $binary\n",
                           $hprev_sym, $a, $offset, $prev_sz, $cur);
                $i++;
            }
        }
        $hprev_sym = $hcur_sym;
        $hprev_addr = $hcur_addr;
    }   
    close MAPFILE;
   
    my $my_cmd="rm $mapfile";
    system($my_cmd);
}

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4. cmd창에서 아래의 형식으로 명령을 수행한다.

perl parse_mapfile.pl <LogFile.log> <model name> <android root folder name>

만약 모델 명 XXTT1, android 폴더명이 "android", fingerprint로그가 저장된 파일명이

"log.log"라면 아래와 같이 해준다.

perl parse_mapfile.pl Log.log XXTT1 android

5. 위와 같이 실행후 나온 결과를 분석한다. call stack이 찍힌다.