From: William L Brown <bbrown@addtoit.com>
To: help-gnu-emacs@gnu.org
Subject: Debugging Perl with Emacs / perldb
Date: Sun, 01 Aug 2010 09:34:27 -0400 [thread overview]
Message-ID: <1280669667.6187.6641.camel@parvathi.addtoit.com> (raw)
Hi Folks,
With "perl -d" on the command line, the standard perl debugger, I
see the code inside of a perl eval as I execute it. Eval'ed code is
code that is created from scratch, outside of a code file and which then
becomes part of your program. Inside if emacs, depending upon my
environment, I either see:
Nothing but an indicator of what line I am running with no view of the
line:
(eval 6)[/home/bbrown/newTmp/emacsDebugTests/foo.pl:8]:7:0
or a new buffer pops up in emacs, with name (eval x), with absolutely
no text inside of it.
How do I fix this issue? Who can I ask? The issue seems to fit
snuggly between Emacs experts and Perl experts.
Thanks very much for your time.
Bill
ps. I included some sample code just to show you how I typically
use eval. A transcript of my "perl -d" session, where I see at
least one line of the eval at a time, follows.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
my $code = "
my (\$foo, \$bar) = \@_;
print \$foo;
print \$bar;
return \$bar;
";
my $subroutine = "sub { $code }";
my $proc = eval $subroutine;
my $baz = "1\n";
my $bat = "2\n";
my $output = eval {no strict "refs"; $proc->($baz, $bat); };
print $output;
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
bbrown@parvathi:~/newTmp/emacsDebugTests$ perl -d foo.pl
Loading DB routines from perl5db.pl version 1.32
Editor support available.
Enter h or `h h' for help, or `man perldebug' for more help.
main::(foo.pl:1): my $code = "
main::(foo.pl:2): my (\$foo, \$bar) = \@_;
main::(foo.pl:3): print \$foo;
main::(foo.pl:4): print \$bar;
main::(foo.pl:5): return \$bar;
main::(foo.pl:6): ";
DB<1> n
main::(foo.pl:7): my $subroutine = "sub { $code }";
DB<1> n
main::(foo.pl:8): my $proc = eval $subroutine;
DB<1> n
main::((eval 6)[foo.pl:8]:7): ;
DB<1> n
main::(foo.pl:9): my $baz = "1\n";
DB<1> n
main::(foo.pl:10): my $bat = "2\n";
DB<1> n
main::(foo.pl:11): my $output = eval {no strict "refs";
$proc->($baz,
$bat); };
DB<1> s
main::(foo.pl:11): my $output = eval {no strict "refs";
$proc->($baz,
$bat); };
DB<1> s
main::CODE(0x8626a50)((eval 6)[foo.pl:8]:2):
2: my ($foo, $bar) = @_; <- I can see the source!!!
DB<1> n
main::CODE(0x8626a50)((eval 6)[foo.pl:8]:3):
3: print $foo;
DB<1> n
1
main::CODE(0x8626a50)((eval 6)[foo.pl:8]:4):
4: print $bar;
DB<1> n
2
main::CODE(0x8626a50)((eval 6)[foo.pl:8]:5):
5: return $bar;
DB<1> n
main::(foo.pl:12): print $output;
DB<1> n
2
Debugged program terminated. Use q to quit or R to restart,
use o inhibit_exit to avoid stopping after program termination,
h q, h R or h o to get additional info.
DB<1>
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
--
William L. Brown
______________________________________
bbrown@addtoit.com
603-465-2114 [Office]
617-803-9156 [Cell]
603-574-4922 [Skype Phone]
508-322-1146 [Google Voice (experimental)]
williambrown0000 [Skype/AIM/Yahoo IM]
______________________________________
next reply other threads:[~2010-08-01 13:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-01 13:34 William L Brown [this message]
2010-08-02 14:31 ` Debugging Perl with Emacs / perldb Gary
[not found] ` <mailman.8.1280759507.17287.help-gnu-emacs@gnu.org>
2010-08-03 18:45 ` Joseph Brenner
[not found] <mailman.4.1280755881.17287.help-gnu-emacs@gnu.org>
2010-08-02 21:42 ` Ilya Zakharevich
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