353 lines
8.5 KiB
Perl
Executable File
353 lines
8.5 KiB
Perl
Executable File
#!/usr/bin/perl
|
|
|
|
# This script processes strace -f output. It displays a graph of invoked
|
|
# subprocesses, and is useful for finding out what complex commands do.
|
|
|
|
# You will probably want to invoke strace with -q as well, and with
|
|
# -s 100 to get complete filenames.
|
|
|
|
# The script can also handle the output with strace -t, -tt, or -ttt.
|
|
# It will add elapsed time for each process in that case.
|
|
|
|
# This script is Copyright (C) 1998 by Richard Braakman <dark@xs4all.nl>.
|
|
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
# 3. The name of the author may not be used to endorse or promote products
|
|
# derived from this software without specific prior written permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
my %unfinished;
|
|
my $floatform;
|
|
|
|
# Scales for strace slowdown. Make configurable!
|
|
my $scale_factor = 3.5;
|
|
|
|
while (<>) {
|
|
my ($pid, $call, $args, $result, $time, $time_spent);
|
|
chop;
|
|
$floatform = 0;
|
|
|
|
s/^(\d+)\s+//;
|
|
$pid = $1;
|
|
|
|
if (s/^(\d\d):(\d\d):(\d\d)(?:\.(\d\d\d\d\d\d))? //) {
|
|
$time = $1 * 3600 + $2 * 60 + $3;
|
|
if (defined $4) {
|
|
$time = $time + $4 / 1000000;
|
|
$floatform = 1;
|
|
}
|
|
} elsif (s/^(\d+)\.(\d\d\d\d\d\d) //) {
|
|
$time = $1 + ($2 / 1000000);
|
|
$floatform = 1;
|
|
}
|
|
|
|
if (s/ <unfinished ...>$//) {
|
|
$unfinished{$pid} = $_;
|
|
next;
|
|
}
|
|
|
|
if (s/^<... \S+ resumed> //) {
|
|
unless (exists $unfinished{$pid}) {
|
|
print STDERR "$0: $ARGV: cannot find start of resumed call on line $.";
|
|
next;
|
|
}
|
|
$_ = $unfinished{$pid} . $_;
|
|
delete $unfinished{$pid};
|
|
}
|
|
|
|
if (/^--- SIG(\S+) (.*) ---$/) {
|
|
# $pid received signal $1
|
|
# currently we don't do anything with this
|
|
next;
|
|
}
|
|
|
|
if (/^\+\+\+ killed by SIG(\S+) \+\+\+$/) {
|
|
# $pid received signal $1
|
|
handle_killed($pid, $time);
|
|
next;
|
|
}
|
|
|
|
if (/^\+\+\+ exited with (\d+) \+\+\+$/) {
|
|
# $pid exited $1
|
|
# currently we don't do anything with this
|
|
next;
|
|
}
|
|
|
|
($call, $args, $result) = /(\S+)\((.*)\)\s+= (.*)$/;
|
|
if ($result =~ /^(.*) <([0-9.]*)>$/) {
|
|
($result, $time_spent) = ($1, $2);
|
|
}
|
|
unless (defined $result) {
|
|
print STDERR "$0: $ARGV: $.: cannot parse line.\n";
|
|
next;
|
|
}
|
|
|
|
handle_trace($pid, $call, $args, $result, $time);
|
|
}
|
|
|
|
display_trace();
|
|
|
|
exit 0;
|
|
|
|
sub parse_str {
|
|
my ($in) = @_;
|
|
my $result = "";
|
|
|
|
while (1) {
|
|
if ($in =~ s/^\\(.)//) {
|
|
$result .= $1;
|
|
} elsif ($in =~ s/^\"//) {
|
|
if ($in =~ s/^\.\.\.//) {
|
|
return ("$result...", $in);
|
|
}
|
|
return ($result, $in);
|
|
} elsif ($in =~ s/([^\\\"]*)//) {
|
|
$result .= $1;
|
|
} else {
|
|
return (undef, $in);
|
|
}
|
|
}
|
|
}
|
|
|
|
sub parse_one {
|
|
my ($in) = @_;
|
|
|
|
if ($in =~ s/^\"//) {
|
|
my $tmp;
|
|
($tmp, $in) = parse_str($in);
|
|
if (not defined $tmp) {
|
|
print STDERR "$0: $ARGV: $.: cannot parse string.\n";
|
|
return (undef, $in);
|
|
}
|
|
return ($tmp, $in);
|
|
} elsif ($in =~ s/^0x([[:xdigit:]]+)//) {
|
|
return (hex $1, $in);
|
|
} elsif ($in =~ s/^(\d+)//) {
|
|
return (int $1, $in);
|
|
} else {
|
|
print STDERR "$0: $ARGV: $.: unrecognized element.\n";
|
|
return (undef, $in);
|
|
}
|
|
}
|
|
|
|
sub parseargs {
|
|
my ($in) = @_;
|
|
my @args = ();
|
|
my $tmp;
|
|
|
|
while (length $in) {
|
|
if ($in =~ s/^\[//) {
|
|
my @subarr = ();
|
|
if ($in =~ s,^/\* (\d+) vars \*/\],,) {
|
|
push @args, $1;
|
|
} else {
|
|
while ($in !~ s/^\]//) {
|
|
($tmp, $in) = parse_one($in);
|
|
defined $tmp or return undef;
|
|
push @subarr, $tmp;
|
|
unless ($in =~ /^\]/ or $in =~ s/^, //) {
|
|
print STDERR "$0: $ARGV: $.: missing comma in array.\n";
|
|
return undef;
|
|
}
|
|
if ($in =~ s/^\.\.\.//) {
|
|
push @subarr, "...";
|
|
}
|
|
}
|
|
push @args, \@subarr;
|
|
}
|
|
} elsif ($in =~ s/^\{//) {
|
|
my %subhash = ();
|
|
while ($in !~ s/^\}//) {
|
|
my $key;
|
|
unless ($in =~ s/^(\w+)=//) {
|
|
print STDERR "$0: $ARGV: $.: struct field expected.\n";
|
|
return undef;
|
|
}
|
|
$key = $1;
|
|
($tmp, $in) = parse_one($in);
|
|
defined $tmp or return undef;
|
|
$subhash{$key} = $tmp;
|
|
unless ($in =~ s/, //) {
|
|
print STDERR "$0: $ARGV: $.: missing comma in struct.\n";
|
|
return undef;
|
|
}
|
|
}
|
|
push @args, \%subhash;
|
|
} else {
|
|
($tmp, $in) = parse_one($in);
|
|
defined $tmp or return undef;
|
|
push @args, $tmp;
|
|
}
|
|
unless (length($in) == 0 or $in =~ s/^, //) {
|
|
print STDERR "$0: $ARGV: $.: missing comma.\n";
|
|
return undef;
|
|
}
|
|
}
|
|
return @args;
|
|
}
|
|
|
|
|
|
my $depth = "";
|
|
|
|
# process info, indexed by pid.
|
|
# fields:
|
|
# parent pid number
|
|
# seq clones, forks and execs for this pid, in sequence (array)
|
|
|
|
# filename and argv (from latest exec)
|
|
# basename (derived from filename)
|
|
# argv[0] is modified to add the basename if it differs from the 0th argument.
|
|
|
|
my %pr;
|
|
|
|
sub handle_trace {
|
|
my ($pid, $call, $args, $result, $time) = @_;
|
|
my $p;
|
|
|
|
if (defined $time and not defined $pr{$pid}{start}) {
|
|
$pr{$pid}{start} = $time;
|
|
}
|
|
|
|
if ($call eq 'execve') {
|
|
return if $result ne '0';
|
|
|
|
my ($filename, $argv) = parseargs($args);
|
|
my ($basename) = $filename =~ m/([^\/]*)$/;
|
|
if ($basename ne $$argv[0]) {
|
|
$$argv[0] = "$basename($$argv[0])";
|
|
}
|
|
my $seq = $pr{$pid}{seq};
|
|
$seq = [] if not defined $seq;
|
|
|
|
push @$seq, ['EXEC', $filename, $argv];
|
|
|
|
$pr{$pid}{seq} = $seq;
|
|
} elsif ($call eq 'fork' || $call eq 'clone' || $call eq 'vfork') {
|
|
return if $result == 0;
|
|
|
|
my $seq = $pr{$pid}{seq};
|
|
$seq = [] if not defined $seq;
|
|
push @$seq, ['FORK', $result];
|
|
$pr{$pid}{seq} = $seq;
|
|
$pr{$result}{parent} = $pid;
|
|
$pr{$result}{seq} = [];
|
|
} elsif ($call eq '_exit' || $call eq 'exit_group') {
|
|
$pr{$pid}{end} = $time if defined $time;
|
|
}
|
|
}
|
|
|
|
sub handle_killed {
|
|
my ($pid, $time) = @_;
|
|
$pr{$pid}{end} = $time if defined $time;
|
|
}
|
|
|
|
sub straight_seq {
|
|
my ($pid) = @_;
|
|
my $seq = $pr{$pid}{seq};
|
|
|
|
for my $elem (@$seq) {
|
|
if ($$elem[0] eq 'EXEC') {
|
|
my $argv = $$elem[2];
|
|
print "$$elem[0] $$elem[1] @$argv\n";
|
|
} elsif ($$elem[0] eq 'FORK') {
|
|
print "$$elem[0] $$elem[1]\n";
|
|
} else {
|
|
print "$$elem[0]\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
sub first_exec {
|
|
my ($pid) = @_;
|
|
my $seq = $pr{$pid}{seq};
|
|
|
|
for my $elem (@$seq) {
|
|
if ($$elem[0] eq 'EXEC') {
|
|
return $elem;
|
|
}
|
|
}
|
|
return undef;
|
|
}
|
|
|
|
sub display_pid_trace {
|
|
my ($pid, $lead) = @_;
|
|
my $i = 0;
|
|
my @seq = @{$pr{$pid}{seq}};
|
|
my $elapsed;
|
|
|
|
if (not defined first_exec($pid)) {
|
|
unshift @seq, ['EXEC', '', ['(anon)'] ];
|
|
}
|
|
|
|
if (defined $pr{$pid}{start} and defined $pr{$pid}{end}) {
|
|
$elapsed = $pr{$pid}{end} - $pr{$pid}{start};
|
|
$elapsed /= $scale_factor;
|
|
if ($floatform) {
|
|
$elapsed = sprintf("%0.02f", $elapsed);
|
|
} else {
|
|
$elapsed = int $elapsed;
|
|
}
|
|
}
|
|
|
|
for my $elem (@seq) {
|
|
$i++;
|
|
if ($$elem[0] eq 'EXEC') {
|
|
my $argv = $$elem[2];
|
|
if (defined $elapsed) {
|
|
print "$lead [$elapsed] $pid @$argv\n";
|
|
undef $elapsed;
|
|
} else {
|
|
print "$lead $pid @$argv\n";
|
|
}
|
|
} elsif ($$elem[0] eq 'FORK') {
|
|
if ($i == 1) {
|
|
if ($lead =~ /-$/) {
|
|
display_pid_trace($$elem[1], "$lead--+--");
|
|
} else {
|
|
display_pid_trace($$elem[1], "$lead +--");
|
|
}
|
|
} elsif ($i == @seq) {
|
|
display_pid_trace($$elem[1], "$lead `--");
|
|
} else {
|
|
display_pid_trace($$elem[1], "$lead +--");
|
|
}
|
|
}
|
|
if ($i == 1) {
|
|
$lead =~ s/\`--/ /g;
|
|
$lead =~ s/-/ /g;
|
|
$lead =~ s/\+/|/g;
|
|
}
|
|
}
|
|
}
|
|
|
|
sub display_trace {
|
|
my ($startpid) = @_;
|
|
|
|
$startpid = (keys %pr)[0];
|
|
while ($pr{$startpid}{parent}) {
|
|
$startpid = $pr{$startpid}{parent};
|
|
}
|
|
|
|
display_pid_trace($startpid, "");
|
|
}
|