从valgrind的callgrind输出中过滤对libc的调用

Question

我正在尝试为服务器生成调用图以用于文档目的.不适用于任何类型的分析.

我生成了输出:

sudo valgrind --tool=callgrind --dump-instr=yes /opt/ats-trunk/bin/traffic_server

并转换为:http://code.google.com/p/jrfonseca/wiki/Gprof2Dot转换为.dot文件,但这包含太多信息,无法用作文档.

我想过滤掉对libc,libstdc ++,libtcl,libhwloc和诸如此类的库的调用.

nb:我一直在努力试图找出无用的库,但这看起来很麻烦且不完整.

非常感谢您提前的答案.

Answer 1

在震耳欲聋的沉默之后,实际上我问到的每一个地方,我都转向了valgrind-users @ ML.这是线程:

http://sourceforge.net/mailarchive/forum.php?thread_name=e847e3a9-0d10-4c5e-929f-51258ecf9dfc%40iris&forum_name=valgrind-users

Josef的回复非常有帮助,并且有很多耐心来自#perl我已经整理了一个脚本,帮助我过滤掉我在调用图中不需要的库.

该脚本依赖于告诉callgrind额外冗长:

valgrind --tool=callgrind --dump-instr=yes --compress-pos=no \
  --compress-strings=no /opt/ats-trunk/bin/traffic_server

这样它将生成字符串而不是引用数字,使其更容易解析:

#!/usr/bin/perl

use Modern::Perl;
require File::Temp;

my $cob = qr{^cob=/(?:usr/)?lib};
my $ob = qr{^ob=/(?:usr/)?lib/};
my $calls = qr{^calls=};

open (my $fh, '<', $ARGV[0]) or die $!;
my $tmp = File::Temp->new(UNLINK => 1);

## Skip all external libraries, as defined by $ob
while (readline $fh) {
    if (/$ob/ ) {
        # skip the entire ob= section we don't need.
        0 while defined($_ = readline $fh) && !/^ob=/;

        # put the last line back, we read too far
        seek($fh, -length($_), 1);
    } else {
        print $tmp $_;
    }
}
close ($fh);

## Skip all calls to external libraries, as defined by $cob
my $tmpname = $tmp->filename;
open ($tmp, '<', $tmpname) or die $!;
while (readline $tmp) {
    if (/$cob/) {

        # skip until we find a line starting with calls=
        # skip that line too
        0 while defined($_ = readline $tmp) && !/$calls/;

        # then we skip until we either hit ^word= or an empty line.
        # In other words: skip all lines that start with 0x
        0 while defined($_ = readline $tmp) && /^0x/;

        # put the last line back, we read too far
        seek($tmp, -length($_), 1);
    }  else {
       print;
    }
}