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65 lines
1.7 KiB
Perl
Executable File
65 lines
1.7 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# This program produces a ``class histogram'' of the live objects, one
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# line per class, with the total number of objects allocated, and
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# total number of bytes attributed to those objects.
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use 5.004;
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use strict;
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use Getopt::Long;
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# So we can find TraceMalloc.pm
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use FindBin;
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use lib "$FindBin::Bin";
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use TraceMalloc;
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# Collect program options
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$::opt_help = 0;
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$::opt_types = "${FindBin::Bin}/types.dat";
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GetOptions("help", "types=s");
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if ($::opt_help) {
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die "usage: histogram.pl [options] <dumpfile>
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--help Display this message
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--types=<file> Read type heuristics from <file>";
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}
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# Initialize type inference juju from the type file specified by
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# ``--types''.
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if ($::opt_types) {
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TraceMalloc::init_type_inference($::opt_types);
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}
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# Read the dump file, collecting count and size information for each
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# object that's detected.
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# This'll hold a record for each class that we detect
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$::Classes = { };
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sub collect_objects($) {
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my ($object) = @_;
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my $type = $object->{'type'};
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my $entry = $::Classes{$type};
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if (! $entry) {
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$entry = $::Classes{$type} = { '#count#' => 0, '#bytes#' => 0 };
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}
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$entry->{'#count#'} += 1;
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$entry->{'#bytes#'} += $object->{'size'};
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}
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TraceMalloc::read(\&collect_objects);
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# Print one line per class, sorted with the classes that accumulated
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# the most bytes first.
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foreach my $class (sort { $::Classes{$b}->{'#bytes#'} <=> $::Classes{$a}->{'#bytes#'} } keys %::Classes) {
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print "$class $::Classes{$class}->{'#count#'} $::Classes{$class}->{'#bytes#'}\n";
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}
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