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#!/usr/bin/perl -w
#
# stackcollapse-instruments.pl
#
# Parses a CSV file containing a call tree as produced by XCode
# Instruments and produces output suitable for flamegraph.pl.
#
# USAGE: ./stackcollapse-instruments.pl infile > outfile
use strict;
my @stack = ();
<>;
foreach (<>) {
chomp;
/\d+\.\d+ms[^,]+,(\d+(?:\.\d*)?),\s+,(\s*)(.+)/ or die;
my $func = $3;
my $depth = length ($2);
$stack [$depth] = $3;
foreach my $i (0 .. $depth - 1) {
print $stack [$i];
print ";";
}
print "$func $1\n";
}
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