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|
package Perf::Trace::Core;
use 5.010000;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our %EXPORT_TAGS = ( 'all' => [ qw(
) ] );
our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );
our @EXPORT = qw(
define_flag_field define_flag_value flag_str dump_flag_fields
define_symbolic_field define_symbolic_value symbol_str dump_symbolic_fields
trace_flag_str
);
our $VERSION = '0.01';
my %trace_flags = (0x00 => "NONE",
0x01 => "IRQS_OFF",
0x02 => "IRQS_NOSUPPORT",
0x04 => "NEED_RESCHED",
0x08 => "HARDIRQ",
0x10 => "SOFTIRQ");
sub trace_flag_str
{
my ($value) = @_;
my $string;
my $print_delim = 0;
foreach my $idx (sort {$a <=> $b} keys %trace_flags) {
if (!$value && !$idx) {
$string .= "NONE";
last;
}
if ($idx && ($value & $idx) == $idx) {
if ($print_delim) {
$string .= " | ";
}
$string .= "$trace_flags{$idx}";
$print_delim = 1;
$value &= ~$idx;
}
}
return $string;
}
my %flag_fields;
my %symbolic_fields;
sub flag_str
{
my ($event_name, $field_name, $value) = @_;
my $string;
if ($flag_fields{$event_name}{$field_name}) {
my $print_delim = 0;
foreach my $idx (sort {$a <=> $b} keys %{$flag_fields{$event_name}{$field_name}{"values"}}) {
if (!$value && !$idx) {
$string .= "$flag_fields{$event_name}{$field_name}{'values'}{$idx}";
last;
}
if ($idx && ($value & $idx) == $idx) {
if ($print_delim && $flag_fields{$event_name}{$field_name}{'delim'}) {
$string .= " $flag_fields{$event_name}{$field_name}{'delim'} ";
}
$string .= "$flag_fields{$event_name}{$field_name}{'values'}{$idx}";
$print_delim = 1;
$value &= ~$idx;
}
}
}
return $string;
}
sub define_flag_field
{
my ($event_name, $field_name, $delim) = @_;
$flag_fields{$event_name}{$field_name}{"delim"} = $delim;
}
sub define_flag_value
{
my ($event_name, $field_name, $value, $field_str) = @_;
$flag_fields{$event_name}{$field_name}{"values"}{$value} = $field_str;
}
sub dump_flag_fields
{
for my $event (keys %flag_fields) {
print "event $event:\n";
for my $field (keys %{$flag_fields{$event}}) {
print " field: $field:\n";
print " delim: $flag_fields{$event}{$field}{'delim'}\n";
foreach my $idx (sort {$a <=> $b} keys %{$flag_fields{$event}{$field}{"values"}}) {
print " value $idx: $flag_fields{$event}{$field}{'values'}{$idx}\n";
}
}
}
}
sub symbol_str
{
my ($event_name, $field_name, $value) = @_;
if ($symbolic_fields{$event_name}{$field_name}) {
foreach my $idx (sort {$a <=> $b} keys %{$symbolic_fields{$event_name}{$field_name}{"values"}}) {
if (!$value && !$idx) {
return "$symbolic_fields{$event_name}{$field_name}{'values'}{$idx}";
last;
}
if ($value == $idx) {
return "$symbolic_fields{$event_name}{$field_name}{'values'}{$idx}";
}
}
}
return undef;
}
sub define_symbolic_field
{
my ($event_name, $field_name) = @_;
# nothing to do, really
}
sub define_symbolic_value
{
my ($event_name, $field_name, $value, $field_str) = @_;
$symbolic_fields{$event_name}{$field_name}{"values"}{$value} = $field_str;
}
sub dump_symbolic_fields
{
for my $event (keys %symbolic_fields) {
print "event $event:\n";
for my $field (keys %{$symbolic_fields{$event}}) {
print " field: $field:\n";
foreach my $idx (sort {$a <=> $b} keys %{$symbolic_fields{$event}{$field}{"values"}}) {
print " value $idx: $symbolic_fields{$event}{$field}{'values'}{$idx}\n";
}
}
}
}
1;
__END__
=head1 NAME
Perf::Trace::Core - Perl extension for perf trace
=head1 SYNOPSIS
use Perf::Trace::Core
=head1 SEE ALSO
Perf (trace) documentation
=head1 AUTHOR
Tom Zanussi, E<lt>tzanussi@gmail.com<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2009 by Tom Zanussi
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.10.0 or,
at your option, any later version of Perl 5 you may have available.
Alternatively, this software may be distributed under the terms of the
GNU General Public License ("GPL") version 2 as published by the Free
Software Foundation.
=cut
|
