gecko-dev/tools/jprof/split-profile.pl

#!/usr/bin/perl
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is a perl script for splitting jprof profiles into
# segments.
#
# The Initial Developer of the Original Code is L. David Baron.
# Portions created by the Initial Developer are Copyright (C) 2002
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#   L. David Baron <dbaron@fas.harvard.edu> (original author)
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****


# split-profile.pl Documentation:
# 
# This script uses jprof's includes (-i) and excludes (-e) options to
# split profiles into segments.  It takes as input a single text file,
# and from that text file creates a series of jprof profiles in the
# directory in which it is run.  It expects the application binaries
# with which the profile was made, including jprof, and the jprof
# profile data, to be in a directory called "bin" that is a subdirectory
# of the current directory, and it will output the profiles into the
# current directory.
#
# The input file format looks like the following:
#
#   poll g_main_poll
#   GetRuleCascade CSSRuleProcessor::GetRuleCascade(nsIPresContext *, nsIAtom *)
#   RuleProcessorData RuleProcessorData::RuleProcessorData(nsIPresContext *, nsIContent *, nsRuleWalker *, nsCompatibility *)
#
# From this input file, the script will construct a profile called
# 00.html that contains the whole profile, a profile called 01-poll.html
# that includes only stacks with g_main_poll, a profile called
# 02-GetRuleCascade.html that includes only stacks that have
# GetRuleCascade and do not have g_main_poll, a profile called
# 03-RuleProcessorData.html that includes only stacks that have the
# RuleProcessorData constructor and do not have GetRuleCascade or
# g_main_poll, and a profile called 04.html that includes only stacks
# that do not have any of the three functions in them.
#
# This means that all of the segments of the profile, except 00.html,
# are mutually exclusive.  Thus clever ordering of the functions in the
# input file can lead to a logical splitting of the profile into
# segments.


use strict;

my @names;
my @sigs;

sub read_info($) {
    my ($fname) = @_;

    open(INFO, "<$fname");
    my $i = 0;
    while (<INFO>) {
        chop;
        my $line = $_;
        my $idx = index($line, " ");
        my $name = substr($line, 0, $idx);
        my $sig = substr($line, $idx+1);

        $names[$i] = $name;
        $sigs[$i] = $sig;
        ++$i;
    }
}

sub run_profile($$) {
    my ($options, $outfile) = @_;

    print  "./jprof$options mozilla-bin jprof-log > ../$outfile.html\n";
    system "./jprof$options mozilla-bin jprof-log > ../$outfile.html";
}

sub run_profiles() {
    run_profile("", "00");

    for (my $i = 0; $i <= $#names + 1; ++$i) {
        my $options = "";
        for (my $j = 0; $j < $i; ++$j) {
            $options .= " -e\"$sigs[$j]\"";
        }
        if ($i <= $#names) {
            $options .= " -i\"$sigs[$i]\"";
        }
        my $num;
        my $n = $i + 1;
        if ($n < 10) {
            $num = "0$n";
        } else {
            $num = "$n";
        }
        if ($i <= $#names) {
            run_profile($options, "$num-$names[$i]");
        } else {
            run_profile($options, "$num");
        }
    }
}

($#ARGV == 0) || die "Usage: split-profile.pl <info-file>\n";

read_info($ARGV[0]);
chdir "bin" || die "Can't change directory to bin.";
run_profiles();