tools/trace-malloc/histogram.pl@b8a032363ba2 (annotated)
tools/trace-malloc/histogram.pl
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rwxr-xr-x
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | #!/usr/bin/perl -w |
| michael@0 | 2 | # |
| michael@0 | 3 | # This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | # License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | # file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| michael@0 | 6 | |
| michael@0 | 7 | # This program produces a ``class histogram'' of the live objects, one |
| michael@0 | 8 | # line per class, with the total number of objects allocated, and |
| michael@0 | 9 | # total number of bytes attributed to those objects. |
| michael@0 | 10 | |
| michael@0 | 11 | use 5.004; |
| michael@0 | 12 | use strict; |
| michael@0 | 13 | use Getopt::Long; |
| michael@0 | 14 | |
| michael@0 | 15 | # So we can find TraceMalloc.pm |
| michael@0 | 16 | use FindBin; |
| michael@0 | 17 | use lib "$FindBin::Bin"; |
| michael@0 | 18 | |
| michael@0 | 19 | use TraceMalloc; |
| michael@0 | 20 | |
| michael@0 | 21 | # Collect program options |
| michael@0 | 22 | $::opt_help = 0; |
| michael@0 | 23 | $::opt_types = "${FindBin::Bin}/types.dat"; |
| michael@0 | 24 | |
| michael@0 | 25 | GetOptions("help", "types=s"); |
| michael@0 | 26 | |
| michael@0 | 27 | if ($::opt_help) { |
| michael@0 | 28 | die "usage: histogram.pl [options] <dumpfile> |
| michael@0 | 29 | --help Display this message |
| michael@0 | 30 | --types=<file> Read type heuristics from <file>"; |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | # Initialize type inference juju from the type file specified by |
| michael@0 | 34 | # ``--types''. |
| michael@0 | 35 | if ($::opt_types) { |
| michael@0 | 36 | TraceMalloc::init_type_inference($::opt_types); |
| michael@0 | 37 | } |
| michael@0 | 38 | |
| michael@0 | 39 | # Read the dump file, collecting count and size information for each |
| michael@0 | 40 | # object that's detected. |
| michael@0 | 41 | |
| michael@0 | 42 | # This'll hold a record for each class that we detect |
| michael@0 | 43 | $::Classes = { }; |
| michael@0 | 44 | |
| michael@0 | 45 | sub collect_objects($) { |
| michael@0 | 46 | my ($object) = @_; |
| michael@0 | 47 | my $type = $object->{'type'}; |
| michael@0 | 48 | |
| michael@0 | 49 | my $entry = $::Classes{$type}; |
| michael@0 | 50 | if (! $entry) { |
| michael@0 | 51 | $entry = $::Classes{$type} = { '#count#' => 0, '#bytes#' => 0 }; |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | $entry->{'#count#'} += 1; |
| michael@0 | 55 | $entry->{'#bytes#'} += $object->{'size'}; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | TraceMalloc::read(\&collect_objects); |
| michael@0 | 59 | |
| michael@0 | 60 | # Print one line per class, sorted with the classes that accumulated |
| michael@0 | 61 | # the most bytes first. |
| michael@0 | 62 | foreach my $class (sort { $::Classes{$b}->{'#bytes#'} <=> $::Classes{$a}->{'#bytes#'} } keys %::Classes) { |
| michael@0 | 63 | print "$class $::Classes{$class}->{'#count#'} $::Classes{$class}->{'#bytes#'}\n"; |
| michael@0 | 64 | } |
