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#!/usr/bin/perl -w
#
# stackcollapse-elfutils Collapse elfutils stack (eu-stack) backtraces
#
# Parse a list of elfutils backtraces as generated with the poor man's
# profiler [1]:
#
# for x in $(seq 1 "$nsamples"); do
# eu-stack -p "$pid" "$@"
# sleep "$sleeptime"
# done
#
# [1] http://poormansprofiler.org/
#
# Copyright 2014 Gabriel Corona. All rights reserved.
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at docs/cddl1.txt or
# http://opensource.org/licenses/CDDL-1.0.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at docs/cddl1.txt.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
use strict;
use Getopt::Long;
my $with_pid = 0;
my $with_tid = 0;
GetOptions('pid' => \$with_pid,
'tid' => \$with_tid)
or die <<USAGE_END;
USAGE: $0 [options] infile > outfile\n
--pid # include PID
--tid # include TID
USAGE_END
my $pid = "";
my $tid = "";
my $current = "";
my $previous_function = "";
my %stacks;
sub add_current {
if(!($current eq "")) {
my $entry;
if ($with_tid) {
$current = "TID=$tid;$current";
}
if ($with_pid) {
$current = "PID=$pid;$current";
}
$stacks{$current} += 1;
$current = "";
}
}
while(<>) {
chomp;
if (m/^PID ([0-9]*)/) {
add_current();
$pid = $1;
}
elsif(m/^TID ([0-9]*)/) {
add_current();
$tid = $1;
} elsif(m/^#[0-9]* *0x[0-9a-f]* (.*)/) {
if ($current eq "") {
$current = $1;
} else {
$current = "$1;$current";
}
} elsif(m/^#[0-9]* *0x[0-9a-f]*/) {
if ($current eq "") {
$current = "[unknown]";
} else {
$current = "[unknown];$current";
}
}
}
add_current();
foreach my $k (sort { $a cmp $b } keys %stacks) {
print "$k $stacks{$k}\n";
}
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