Devel::STrace::Monitor - Monitor interface component for Devel::STrace
# # open the mmap'ed file # use Devel::STrace::Monitor; my $view = Devel::STrace::Monitor->open('somefile.map'); my $cycles = 0; while (1) { print "\n**************************************\n"; # # refresh the internal ringbuffer map # $view->refresh(); # # dump the current traces # $view->trace(\&dump_trace); sleep 10; } # # method to display the traces # sub dump_trace { my ($key, $slot, $depth, $line, $time, $entry) = @_; $lastkey = $key, print "\n**************************************\n" unless ($lastkey eq $key); if ($time) { # # trim the weekday and year from timestamp # my $frac = ($time - int($time)) * 1000000; $frac=~s/\..*$//; my @parts = split(/\s+/, scalar localtime($time)); pop @parts; # get rid of year print "$key($depth) : $slot : $entry:$line at ", join(' ', @parts), '.', $frac, "\n"; } else { print "$key($depth) : $slot : $entry:$line (No timestamp)\n"; } }
Provides methods to
attach to and read the memory mapped file generated by Devel::STrace (or future full featured debuggers) using Devel::RingBuffer.
set or clear any of the $DB::single, $DB::trace, or $DB::signal control variables of the AUT (via their tie'd interfaces in the AUT).
$DB::single
$DB::trace
$DB::signal
inspect the current execution call stack of the AUT
The interfaces provide a simple framework for building an external application that can attach to a running Perl application, monitor its current execution, and eventually detach, all while permitting the application continue to run uninterrupted.
A more complete debugger module is planned to exploit the various command/control structures available via Devel::RingBuffer. Note that this module will be fully compatible with the resulting debugger so that, e.g., an application can first be monitored to detect troublespots, and then the debugger can be attached to fully debug the problem.
Refer to the include classdocs for summary and detail method descriptions.
Devel::STrace
Devel::RingBuffer
IPC::Mmap
plstrace.pl is a simple command line script using this module.
plstrace.pl
Dean Arnold mailto:darnold@presicient.com
Copyright(C) 2006, Dean Arnold, Presicient Corp., USA. All rights reserved.
Permission is granted to use this software under the same terms as Perl itself. Refer to the Perl Artistic License for details.
To install Devel::STrace, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Devel::STrace
CPAN shell
perl -MCPAN -e shell install Devel::STrace
For more information on module installation, please visit the detailed CPAN module installation guide.