mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-08 22:08:16 +00:00
331 lines
11 KiB
Perl
Executable File
331 lines
11 KiB
Perl
Executable File
#!/usr/bin/perl -w
|
|
#
|
|
# ***** BEGIN LICENSE BLOCK *****
|
|
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
#
|
|
# The contents of this file are subject to the Mozilla Public License Version
|
|
# 1.1 (the "License"); you may not use this file except in compliance with
|
|
# the License. You may obtain a copy of the License at
|
|
# http://www.mozilla.org/MPL/
|
|
#
|
|
# Software distributed under the License is distributed on an "AS IS" basis,
|
|
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
# for the specific language governing rights and limitations under the
|
|
# License.
|
|
#
|
|
# The Original Code is mozilla.org Code.
|
|
#
|
|
# The Initial Developer of the Original Code is
|
|
# Netscape Communications Corporation.
|
|
# Portions created by the Initial Developer are Copyright (C) 1998
|
|
# the Initial Developer. All Rights Reserved.
|
|
#
|
|
# Contributor(s):
|
|
#
|
|
# Alternatively, the contents of this file may be used under the terms of
|
|
# either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
# in which case the provisions of the GPL or the LGPL are applicable instead
|
|
# of those above. If you wish to allow use of your version of this file only
|
|
# under the terms of either the GPL or the LGPL, and not to allow others to
|
|
# use your version of this file under the terms of the MPL, indicate your
|
|
# decision by deleting the provisions above and replace them with the notice
|
|
# and other provisions required by the GPL or the LGPL. If you do not delete
|
|
# the provisions above, a recipient may use your version of this file under
|
|
# the terms of any one of the MPL, the GPL or the LGPL.
|
|
#
|
|
# ***** END LICENSE BLOCK *****
|
|
|
|
use 5.004;
|
|
use strict;
|
|
use Getopt::Long;
|
|
|
|
$::opt_prune_depth = 0;
|
|
$::opt_subtree_size = 0;
|
|
$::opt_reverse = 0;
|
|
|
|
# GetOption will create $opt_object & $opt_exclude, so ignore the
|
|
# warning that gets spit out about those vbls.
|
|
GetOptions("object=s", "exclude=s", "comptrs=s", "ignore-balanced", "subtree-size=i", "prune-depth=i",
|
|
"collapse-to-method", "collapse-to-class", "old-style", "reverse");
|
|
|
|
$::opt_object ||
|
|
die qq{
|
|
usage: leak.pl < logfile
|
|
--object <obj> The address of the object to examine (required)
|
|
--exclude <file> Exclude routines listed in <file>
|
|
--comptrs <file> Subtract all the data in the balanced COMPtr log <file>
|
|
--ignore-balanced Ignore balanced subtrees
|
|
--subtree-size <n> Print subtrees with more than <n> nodes separately
|
|
--prune-depth <depth> Prune the tree to <depth>
|
|
--collapse-to-method Aggregate data by method
|
|
--collapse-to-class Aggregate data by class (subsumes --collapse-to-method)
|
|
--reverse Reverse call stacks, showing leaves first
|
|
--old-style Old-style formatting
|
|
};
|
|
|
|
$::opt_prune_depth = 0 if $::opt_prune_depth < 0;
|
|
$::opt_subtree_size = 0 if $::opt_subtree_size < 0;
|
|
|
|
warn "object $::opt_object\n";
|
|
warn "ignoring balanced subtrees\n" if $::opt_ignore_balanced;
|
|
warn "prune depth $::opt_prune_depth\n" if $::opt_prune_depth;
|
|
warn "collapsing to class\n" if $::opt_collapse_to_class;
|
|
warn "collapsing to method\n" if $::opt_collapse_to_method && !$::opt_collapse_to_class;
|
|
warn "reversing call stacks\n" if $::opt_reverse;
|
|
|
|
|
|
# The 'excludes' are functions that, if detected in a particular call
|
|
# stack, will cause the _entire_ call stack to be ignored. You might,
|
|
# for example, explicitly exclude two functions that have a matching
|
|
# AddRef/Release pair.
|
|
|
|
my %excludes;
|
|
|
|
if ($::opt_exclude) {
|
|
open(EXCLUDE, "<".$::opt_exclude)
|
|
|| die "unable to open $::opt_exclude";
|
|
|
|
while (<EXCLUDE>) {
|
|
chomp $_;
|
|
warn "excluding $_\n";
|
|
$excludes{$_} = 1;
|
|
}
|
|
}
|
|
|
|
# Each entry in the tree rooted by callGraphRoot contains the following:
|
|
# #name# This call's name+offset string
|
|
# #refcount# The net reference count of this call
|
|
# #label# The label used for this subtree; only defined for labeled nodes
|
|
# #children# List of children in alphabetical order
|
|
# zero or more children indexed by method name+offset strings.
|
|
|
|
my $callGraphRoot;
|
|
$callGraphRoot = { '#name#' => '.root', '#refcount#' => 'n/a' };
|
|
|
|
# The 'imbalance' is a gross count of how balanced a particular
|
|
# callsite is. It is used to prune away callsites that are detected to
|
|
# be balanced; that is, that have matching AddRef/Release() pairs.
|
|
|
|
my %imbalance;
|
|
$imbalance{'.root'} = 'n/a';
|
|
|
|
# The main read loop.
|
|
|
|
sub read_data($$$) {
|
|
my ($INFILE, $plus, $minus) = @_;
|
|
|
|
LINE: while (<$INFILE>) {
|
|
next LINE if (! /^</);
|
|
my @fields = split(/ /, $_);
|
|
|
|
my $class = shift(@fields);
|
|
my $obj = shift(@fields);
|
|
my $sno = shift(@fields);
|
|
next LINE unless ($obj eq $::opt_object);
|
|
|
|
my $op = shift(@fields);
|
|
next LINE unless ($op eq $plus || $op eq $minus);
|
|
|
|
my $cnt = shift(@fields);
|
|
|
|
# Collect the remaining lines to create a stack trace.
|
|
my @stack;
|
|
CALLSITE: while (<$INFILE>) {
|
|
chomp;
|
|
last CALLSITE if (/^$/);
|
|
$stack[++$#stack] = $_;
|
|
}
|
|
|
|
# Reverse the remaining fields to produce the call stack, with the
|
|
# oldest frame at the front of the array.
|
|
if (! $::opt_reverse) {
|
|
@stack = reverse(@stack);
|
|
}
|
|
|
|
my $call;
|
|
|
|
# If any of the functions in the stack are supposed to be excluded,
|
|
# march on to the next line.
|
|
foreach $call (@stack) {
|
|
next LINE if exists($excludes{$call});
|
|
}
|
|
|
|
|
|
# Add the callstack as a path through the call graph, updating
|
|
# refcounts at each node.
|
|
|
|
my $caller = $callGraphRoot;
|
|
|
|
foreach $call (@stack) {
|
|
|
|
# Chop the method offset if we're 'collapsing to method' or
|
|
# 'collapsing to class'.
|
|
$call =~ s/\+0x.*$//g if ($::opt_collapse_to_method || $::opt_collapse_to_class);
|
|
|
|
# Chop the method name if we're 'collapsing to class'.
|
|
$call =~ s/::.*$//g if ($::opt_collapse_to_class);
|
|
|
|
my $site = $caller->{$call};
|
|
if (!$site) {
|
|
# This is the first time we've seen this callsite. Add a
|
|
# new entry to the call tree.
|
|
|
|
$site = { '#name#' => $call, '#refcount#' => 0 };
|
|
$caller->{$call} = $site;
|
|
}
|
|
|
|
if ($op eq $plus) {
|
|
++($site->{'#refcount#'});
|
|
++($imbalance{$call});
|
|
} elsif ($op eq $minus) {
|
|
--($site->{'#refcount#'});
|
|
--($imbalance{$call});
|
|
} else {
|
|
die "Bad operation $op";
|
|
}
|
|
|
|
$caller = $site;
|
|
}
|
|
}
|
|
}
|
|
|
|
read_data(*STDIN, "AddRef", "Release");
|
|
|
|
if ($::opt_comptrs) {
|
|
warn "Subtracting comptr log ". $::opt_comptrs . "\n";
|
|
open(COMPTRS, "<".$::opt_comptrs)
|
|
|| die "unable to open $::opt_comptrs";
|
|
|
|
# read backwards to subtract
|
|
read_data(*COMPTRS, "nsCOMPtrRelease", "nsCOMPtrAddRef");
|
|
}
|
|
|
|
sub num_alpha {
|
|
my ($aN, $aS, $bN, $bS);
|
|
($aN, $aS) = ($1, $2) if $a =~ /^(\d+) (.+)$/;
|
|
($bN, $bS) = ($1, $2) if $b =~ /^(\d+) (.+)$/;
|
|
return $a cmp $b unless defined $aN && defined $bN;
|
|
return $aN <=> $bN unless $aN == $bN;
|
|
return $aS cmp $bS;
|
|
}
|
|
|
|
# Given a subtree and its nesting level, return true if that subtree should be pruned.
|
|
# If it shouldn't be pruned, destructively attempt to prune its children.
|
|
# Also compute the #children# properties of unpruned nodes.
|
|
sub prune($$) {
|
|
my ($site, $nest) = @_;
|
|
|
|
# If they want us to prune the tree's depth, do so here.
|
|
return 1 if ($::opt_prune_depth && $nest >= $::opt_prune_depth);
|
|
|
|
# If the subtree is balanced, ignore it.
|
|
return 1 if ($::opt_ignore_balanced && !$site->{'#refcount#'});
|
|
|
|
my $name = $site->{'#name#'};
|
|
|
|
# If the symbol isn't imbalanced, then prune here (and warn)
|
|
if ($::opt_ignore_balanced && !$imbalance{$name}) {
|
|
warn "discarding " . $name . "\n";
|
|
# return 1;
|
|
}
|
|
|
|
my @children;
|
|
foreach my $child (sort num_alpha keys(%$site)) {
|
|
if (substr($child, 0, 1) ne '#') {
|
|
if (prune($site->{$child}, $nest + 1)) {
|
|
delete $site->{$child};
|
|
} else {
|
|
push @children, $site->{$child};
|
|
}
|
|
}
|
|
}
|
|
$site->{'#children#'} = \@children;
|
|
return 0;
|
|
}
|
|
|
|
|
|
# Compute the #label# properties of this subtree.
|
|
# Return the subtree's number of nodes, not counting nodes reachable
|
|
# through a labeled node.
|
|
sub createLabels($) {
|
|
my ($site) = @_;
|
|
my @children = @{$site->{'#children#'}};
|
|
my $nChildren = @children;
|
|
my $nDescendants = 0;
|
|
|
|
foreach my $child (@children) {
|
|
my $childDescendants = createLabels($child);
|
|
if ($nChildren > 1 && $childDescendants > $::opt_subtree_size) {
|
|
die "Internal error" if defined($child->{'#label#'});
|
|
$child->{'#label#'} = "__label__";
|
|
$childDescendants = 1;
|
|
}
|
|
$nDescendants += $childDescendants;
|
|
}
|
|
return $nDescendants + 1;
|
|
}
|
|
|
|
|
|
my $nextLabel = 0;
|
|
my @labeledSubtrees;
|
|
|
|
sub list($$$$$) {
|
|
my ($site, $nest, $nestStr, $childrenLeft, $root) = @_;
|
|
my $label = !$root && $site->{'#label#'};
|
|
|
|
# Assign a unique number to the label.
|
|
if ($label) {
|
|
die unless $label eq "__label__";
|
|
$label = "__" . ++$nextLabel . "__";
|
|
$site->{'#label#'} = $label;
|
|
push @labeledSubtrees, $site;
|
|
}
|
|
|
|
print $nestStr;
|
|
if ($::opt_old_style) {
|
|
print $label, " " if $label;
|
|
print $site->{'#name#'}, ": bal=", $site->{'#refcount#'}, "\n";
|
|
} else {
|
|
my $refcount = $site->{'#refcount#'};
|
|
my $l = 8 - length $refcount;
|
|
$l = 1 if $l < 1;
|
|
print $refcount, " " x $l;
|
|
print $label, " " if $label;
|
|
print $site->{'#name#'}, "\n";
|
|
}
|
|
|
|
$nestStr .= $childrenLeft && !$::opt_old_style ? "| " : " ";
|
|
if (!$label) {
|
|
my @children = @{$site->{'#children#'}};
|
|
$childrenLeft = @children;
|
|
foreach my $child (@children) {
|
|
$childrenLeft--;
|
|
list($child, $nest + 1, $nestStr, $childrenLeft);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (!prune($callGraphRoot, 0)) {
|
|
createLabels $callGraphRoot if ($::opt_subtree_size);
|
|
list $callGraphRoot, 0, "", 0, 1;
|
|
while (@labeledSubtrees) {
|
|
my $labeledSubtree = shift @labeledSubtrees;
|
|
print "\n------------------------------\n",
|
|
$labeledSubtree->{'#label#'}, "\n";
|
|
list $labeledSubtree, 0, "", 0, 1;
|
|
}
|
|
print "\n------------------------------\n" if @labeledSubtrees;
|
|
}
|
|
|
|
print qq{
|
|
Imbalance
|
|
---------
|
|
};
|
|
|
|
foreach my $call (sort num_alpha keys(%imbalance)) {
|
|
print $call . " " . $imbalance{$call} . "\n";
|
|
}
|
|
|