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# Copyright (c) 2009, 2010 Nicira, Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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if (grep($_ eq '--help', @ARGV)) {
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$0, for parsing leak checker logs
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usage: $0 [BINARY] < LOG
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where LOG is a file produced by an Open vSwitch program's --check-leaks option
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and BINARY is the binary that wrote LOG.
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die "$0: zero or one arguments required; use --help for help\n" if @ARGV > 1;
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die "$0: $ARGV[0] does not exist" if @ARGV > 0 && ! -e $ARGV[0];
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our ($a2l) = search_path("addr2line");
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my ($no_syms) = "symbols will not be translated (use --help for help)";
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print "no binary specified; $no_syms\n";
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} elsif (! -e $ARGV[0]) {
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print "$ARGV[0] does not exist; $no_syms";
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} elsif (!defined($a2l)) {
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print "addr2line not found in PATH; $no_syms";
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our ($objdump) = search_path("objdump");
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print "objdump not found; dynamic library symbols will not be translated\n"
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if !defined($objdump);
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my $ptr = "((?:0x)?[0-9a-fA-F]+|\\(nil\\))";
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my $callers = ":((?: $ptr)+)";
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if (/^malloc\((\d+)\) -> $ptr$callers$/) {
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allocated($., $2, $1, $3);
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} elsif (/^claim\($ptr\)$callers$/) {
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} elsif (/realloc\($ptr, (\d+)\) -> $ptr$callers$/) {
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freed($., $1, $callers);
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allocated($., $3, $2, $callers);
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} elsif (/^free\($ptr\)$callers$/) {
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} elsif (/^segment: $ptr-$ptr $ptr [-r][-w][-x][sp] (.*)/) {
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add_segment(hex($1), hex($2), hex($3), $4);
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print "stdin:$.: syntax error\n";
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my $n_blocks = scalar(keys(%blocks));
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$n_bytes += $_->{SIZE} foreach values(%blocks);
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print "$n_bytes bytes in $n_blocks blocks not freed at end of run\n";
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my %blocks_by_callers;
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foreach my $block (values(%blocks)) {
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my ($trimmed_callers) = trim_callers($block->{CALLERS});
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push (@{$blocks_by_callers{$trimmed_callers}}, $block);
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foreach my $callers (sort {@{$b} <=> @{$a}} (values(%blocks_by_callers))) {
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$n_blocks = scalar(@{$callers});
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$n_bytes += $_->{SIZE} foreach @{$callers};
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print "$n_bytes bytes in these $n_blocks blocks were not freed:\n";
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foreach my $block (sort {$a->{LINE} <=> $b->{LINE}} (@{$callers})) {
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printf "\t%d-byte block at 0x%08x allocated on stdin:%d\n",
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$block->{SIZE}, $block->{BASE}, $block->{LINE};
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print "\t...and ", $n_blocks - $max, " others...\n"
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print "The blocks listed above were allocated by:\n";
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print_callers("\t", ${$callers}[0]->{CALLERS});
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return $s_ptr eq '(nil)' ? 0 : hex($s_ptr);
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my ($line, $s_base, $size, $callers) = @_;
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my ($base) = interp_pointer($s_base);
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my ($info) = {LINE => $line,
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CALLERS => $callers};
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if (exists($blocks{$base})) {
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print "In-use address returned by allocator:\n";
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print "\tInitial allocation:\n";
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print_block("\t\t", $blocks{$base});
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print "\tNew allocation:\n";
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print_block("\t\t", $info);
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$blocks{$base} = $info;
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my ($line, $s_base, $callers) = @_;
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my ($base) = interp_pointer($s_base);
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if (exists($blocks{$base})) {
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$blocks{$base}{LINE} = $line;
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$blocks{$base}{CALLERS} = $callers;
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printf "Claim asserted on not-in-use block 0x%08x by:\n", $base;
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print_callers('', $callers);
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my ($line, $s_base, $callers) = @_;
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my ($base) = interp_pointer($s_base);
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if (!delete($blocks{$base})) {
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printf "Bad free of not-allocated address 0x%08x on stdin:%d by:\n", $base, $line;
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print_callers('', $callers);
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my ($prefix, $info) = @_;
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printf '%s%d-byte block at 0x%08x allocated on stdin:%d by:' . "\n",
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$prefix, $info->{SIZE}, $info->{BASE}, $info->{LINE};
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print_callers($prefix, $info->{CALLERS});
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my ($prefix, $callers) = @_;
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foreach my $pc (split(' ', $callers)) {
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print "$prefix\t", lookup_pc($pc), "\n";
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if (defined($binary)) {
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my ($pc) = hex($s_pc);
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my ($output) = "$s_pc: ";
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if (!exists($cache{$pc})) {
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open(A2L, "$a2l -fe $binary --demangle $s_pc|");
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chomp(my $function = <A2L>);
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chomp(my $line = <A2L>);
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if ($function eq '??') {
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($function, $line) = lookup_pc_by_segment($pc);
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$line =~ s/^(\.\.\/)*//;
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$line = "..." . substr($line, -25) if length($line) > 28;
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$cache{$pc} = "$s_pc: $function ($line)";
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foreach my $pc (split(' ', $in)) {
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my $xlated = lookup_pc($pc);
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if ($xlated =~ /\?\?/) {
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push(@out, "...") if !@out || $out[$#out] ne '...';
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return join(' ', @out);
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for my $dir (split (':', $ENV{PATH})) {
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my ($file) = "$dir/$target";
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return $file if -e $file;
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my ($vm_start, $vm_end, $vm_pgoff, $file) = @_;
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for (my $i = 0; $i <= $#segments; $i++) {
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my ($s) = $segments[$i];
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next if $vm_end <= $s->{START} || $vm_start >= $s->{END};
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if ($vm_start <= $s->{START} && $vm_end >= $s->{END}) {
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splice(@segments, $i, 1);
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$s->{START} = $vm_end if $vm_end > $s->{START};
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$s->{END} = $vm_start if $vm_start <= $s->{END};
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push(@segments, {START => $vm_start,
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@segments = sort { $a->{START} <=> $b->{START} } @segments;
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my ($array, $value) = @_;
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my $m = int(($l + $r) / 2);
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my $e = $array->[$m];
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if ($value < $e->{START}) {
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} elsif ($value >= $e->{END}) {
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open(OBJDUMP, "$objdump -h $file|");
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my $ptr = "([0-9a-fA-F]+)";
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my ($name, $size, $vma, $lma, $file_off)
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= /^\s*\d+\s+(\S+)\s+$ptr\s+$ptr\s+$ptr\s+$ptr/
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push(@sections, {START => hex($file_off),
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END => hex($file_off) + hex($size),
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return [sort { $a->{START} <=> $b->{START} } @sections ];
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our %file_to_sections;
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sub segment_to_section {
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my ($file, $file_offset) = @_;
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if (!defined($file_to_sections{$file})) {
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$file_to_sections{$file} = read_sections($file);
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return binary_search($file_to_sections{$file}, $file_offset);
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sub address_to_segment {
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return binary_search(\@segments, $pc);
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sub lookup_pc_by_segment {
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return ('??', 0) if !defined($objdump);
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my ($segment) = address_to_segment($pc);
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return ('??', 0) if !defined($segment) || $segment->{FILE} eq '';
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my ($file_offset) = $pc - $segment->{START} + $segment->{PGOFF};
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my ($section) = segment_to_section($segment->{FILE}, $file_offset);
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return ('??', 0) if !defined($section);
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my ($section_offset) = $file_offset - $section->{START};
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open(A2L, sprintf("%s -fe %s --demangle --section=$section->{NAME} 0x%x|",
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$a2l, $segment->{FILE}, $section_offset));
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chomp(my $function = <A2L>);
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chomp(my $line = <A2L>);
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return ($function, $line);
added
removed
utilities/ovs-parse-leaks.in
