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#!/usr/bin/perl -ws
#
# stackcollapse-gdb Collapse GDB backtraces
#
# Parse a list of GDB backtraces as generated with the poor man's
# profiler [1]:
#
# for x in $(seq 1 500); do
# gdb -ex "set pagination 0" -ex "thread apply all bt" -batch -p $pid 2> /dev/null
# sleep 0.01
# 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;
my $current = "";
my $previous_function = "";
my %stacks;
while(<>) {
chomp;
if (m/^Thread/) {
$current=""
}
elsif(m/^#[0-9]* *([^ ]*) ([^ ]*) ([^ ]*) ([^ ]*)/) {
my $function = $3;
my $alt = $1;
if(not($1 =~ /0x[a-zA-Z0-9]*/)) {
$function = $alt;
}
if ($current eq "") {
$current = $function;
} else {
$current = $function . ";" . $current;
}
} elsif(!($current eq "")) {
$stacks{$current} += 1;
$current = "";
}
}
if(!($current eq "")) {
$stacks{$current} += 1;
$current = "";
}
foreach my $k (sort { $a cmp $b } keys %stacks) {
print "$k $stacks{$k}\n";
}
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