Current Path : /usr/lib64/perl5/B/ |
|
Current File : //usr/lib64/perl5/B/Debug.pm |
package B::Debug;
our $VERSION = '1.11';
use strict;
require 5.006;
use B qw(peekop class walkoptree walkoptree_exec
main_start main_root cstring sv_undef);
use Config;
my (@optype, @specialsv_name);
require B;
if ($] < 5.009) {
require B::Asmdata;
B::Asmdata->import qw(@optype @specialsv_name);
} else {
B->import qw(@optype @specialsv_name);
}
my $have_B_Flags;
if (!$ENV{PERL_CORE}){ # avoid CORE test crashes
eval { require B::Flags and $have_B_Flags++ };
}
my %done_gv;
sub _printop {
my $op = shift;
my $addr = ${$op} ? $op->ppaddr : '';
$addr =~ s/^PL_ppaddr// if $addr;
return sprintf "0x%x %s %s", ${$op}, ${$op} ? class($op) : '', $addr;
}
sub B::OP::debug {
my ($op) = @_;
printf <<'EOT', class($op), $$op, $op->ppaddr, _printop($op->next), _printop($op->sibling), $op->targ, $op->type;
%s (0x%lx)
op_ppaddr %s
op_next %s
op_sibling %s
op_targ %d
op_type %d
EOT
if ($] > 5.009) {
printf <<'EOT', $op->opt;
op_opt %d
EOT
} else {
printf <<'EOT', $op->seq;
op_seq %d
EOT
}
if ($have_B_Flags) {
printf <<'EOT', $op->flags, $op->flagspv, $op->private, $op->privatepv;
op_flags %d %s
op_private %d %s
EOT
} else {
printf <<'EOT', $op->flags, $op->private;
op_flags %d
op_private %d
EOT
}
}
sub B::UNOP::debug {
my ($op) = @_;
$op->B::OP::debug();
printf "\top_first\t%s\n", _printop($op->first);
}
sub B::BINOP::debug {
my ($op) = @_;
$op->B::UNOP::debug();
printf "\top_last \t%s\n", _printop($op->last);
}
sub B::LOOP::debug {
my ($op) = @_;
$op->B::BINOP::debug();
printf <<'EOT', _printop($op->redoop), _printop($op->nextop), _printop($op->lastop);
op_redoop %s
op_nextop %s
op_lastop %s
EOT
}
sub B::LOGOP::debug {
my ($op) = @_;
$op->B::UNOP::debug();
printf "\top_other\t%s\n", _printop($op->other);
}
sub B::LISTOP::debug {
my ($op) = @_;
$op->B::BINOP::debug();
printf "\top_children\t%d\n", $op->children;
}
sub B::PMOP::debug {
my ($op) = @_;
$op->B::LISTOP::debug();
printf "\top_pmreplroot\t0x%x\n", $] < 5.008 ? ${$op->pmreplroot} : $op->pmreplroot;
printf "\top_pmreplstart\t0x%x\n", ${$op->pmreplstart};
printf "\top_pmnext\t0x%x\n", ${$op->pmnext} if $] < 5.009005;
if ($Config{'useithreads'}) {
printf "\top_pmstashpv\t%s\n", cstring($op->pmstashpv);
printf "\top_pmoffset\t%d\n", $op->pmoffset;
} else {
printf "\top_pmstash\t%s\n", cstring($op->pmstash);
}
printf "\top_precomp\t%s\n", cstring($op->precomp);
printf "\top_pmflags\t0x%x\n", $op->pmflags;
printf "\top_reflags\t0x%x\n", $op->reflags if $] >= 5.009;
printf "\top_pmpermflags\t0x%x\n", $op->pmpermflags if $] < 5.009;
printf "\top_pmdynflags\t0x%x\n", $op->pmdynflags if $] < 5.009;
$op->pmreplroot->debug if $] < 5.008;
}
sub B::COP::debug {
my ($op) = @_;
$op->B::OP::debug();
my $cop_io = class($op->io) eq 'SPECIAL' ? '' : $op->io->as_string;
printf <<'EOT', $op->label, $op->stashpv, $op->file, $op->cop_seq, $op->arybase, $op->line, ${$op->warnings}, cstring($cop_io);
cop_label "%s"
cop_stashpv "%s"
cop_file "%s"
cop_seq %d
cop_arybase %d
cop_line %d
cop_warnings 0x%x
cop_io %s
EOT
}
sub B::SVOP::debug {
my ($op) = @_;
$op->B::OP::debug();
printf "\top_sv\t\t0x%x\n", ${$op->sv};
$op->sv->debug;
}
sub B::PVOP::debug {
my ($op) = @_;
$op->B::OP::debug();
printf "\top_pv\t\t%s\n", cstring($op->pv);
}
sub B::PADOP::debug {
my ($op) = @_;
$op->B::OP::debug();
printf "\top_padix\t%ld\n", $op->padix;
}
sub B::NULL::debug {
my ($sv) = @_;
if ($$sv == ${sv_undef()}) {
print "&sv_undef\n";
} else {
printf "NULL (0x%x)\n", $$sv;
}
}
sub B::SV::debug {
my ($sv) = @_;
if (!$$sv) {
print class($sv), " = NULL\n";
return;
}
printf <<'EOT', class($sv), $$sv, $sv->REFCNT, $sv->FLAGS;
%s (0x%x)
REFCNT %d
FLAGS 0x%x
EOT
}
sub B::RV::debug {
my ($rv) = @_;
B::SV::debug($rv);
printf <<'EOT', ${$rv->RV};
RV 0x%x
EOT
$rv->RV->debug;
}
sub B::PV::debug {
my ($sv) = @_;
$sv->B::SV::debug();
my $pv = $sv->PV();
printf <<'EOT', cstring($pv), length($pv);
xpv_pv %s
xpv_cur %d
EOT
}
sub B::IV::debug {
my ($sv) = @_;
$sv->B::SV::debug();
printf "\txiv_iv\t\t%d\n", $sv->IV;
}
sub B::NV::debug {
my ($sv) = @_;
$sv->B::IV::debug();
printf "\txnv_nv\t\t%s\n", $sv->NV;
}
sub B::PVIV::debug {
my ($sv) = @_;
$sv->B::PV::debug();
printf "\txiv_iv\t\t%d\n", $sv->IV;
}
sub B::PVNV::debug {
my ($sv) = @_;
$sv->B::PVIV::debug();
printf "\txnv_nv\t\t%s\n", $sv->NV;
}
sub B::PVLV::debug {
my ($sv) = @_;
$sv->B::PVNV::debug();
printf "\txlv_targoff\t%d\n", $sv->TARGOFF;
printf "\txlv_targlen\t%u\n", $sv->TARGLEN;
printf "\txlv_type\t%s\n", cstring(chr($sv->TYPE));
}
sub B::BM::debug {
my ($sv) = @_;
$sv->B::PVNV::debug();
printf "\txbm_useful\t%d\n", $sv->USEFUL;
printf "\txbm_previous\t%u\n", $sv->PREVIOUS;
printf "\txbm_rare\t%s\n", cstring(chr($sv->RARE));
}
sub B::CV::debug {
my ($sv) = @_;
$sv->B::PVNV::debug();
my ($stash) = $sv->STASH;
my ($start) = $sv->START;
my ($root) = $sv->ROOT;
my ($padlist) = $sv->PADLIST;
my ($file) = $sv->FILE;
my ($gv) = $sv->GV;
printf <<'EOT', $$stash, $$start, $$root, $$gv, $file, $sv->DEPTH, $padlist, ${$sv->OUTSIDE}, $sv->OUTSIDE_SEQ;
STASH 0x%x
START 0x%x
ROOT 0x%x
GV 0x%x
FILE %s
DEPTH %d
PADLIST 0x%x
OUTSIDE 0x%x
OUTSIDE_SEQ %d
EOT
$start->debug if $start;
$root->debug if $root;
$gv->debug if $gv;
$padlist->debug if $padlist;
}
sub B::AV::debug {
my ($av) = @_;
$av->B::SV::debug;
# tied arrays may leave out FETCHSIZE
my (@array) = eval { $av->ARRAY; };
print "\tARRAY\t\t(", join(", ", map("0x" . $$_, @array)), ")\n";
my $fill = eval { scalar(@array) };
if ($Config{'useithreads'}) {
printf <<'EOT', $fill, $av->MAX, $av->OFF;
FILL %d
MAX %d
OFF %d
EOT
} else {
printf <<'EOT', $fill, $av->MAX;
FILL %d
MAX %d
EOT
}
printf <<'EOT', $av->AvFLAGS if $] < 5.009;
AvFLAGS %d
EOT
}
sub B::GV::debug {
my ($gv) = @_;
if ($done_gv{$$gv}++) {
printf "GV %s::%s\n", $gv->STASH->NAME, $gv->SAFENAME;
return;
}
my ($sv) = $gv->SV;
my ($av) = $gv->AV;
my ($cv) = $gv->CV;
$gv->B::SV::debug;
printf <<'EOT', $gv->SAFENAME, $gv->STASH->NAME, $gv->STASH, $$sv, $gv->GvREFCNT, $gv->FORM, $$av, ${$gv->HV}, ${$gv->EGV}, $$cv, $gv->CVGEN, $gv->LINE, $gv->FILE, $gv->GvFLAGS;
NAME %s
STASH %s (0x%x)
SV 0x%x
GvREFCNT %d
FORM 0x%x
AV 0x%x
HV 0x%x
EGV 0x%x
CV 0x%x
CVGEN %d
LINE %d
FILE %s
GvFLAGS 0x%x
EOT
$sv->debug if $sv;
$av->debug if $av;
$cv->debug if $cv;
}
sub B::SPECIAL::debug {
my $sv = shift;
print $specialsv_name[$$sv], "\n";
}
sub compile {
my $order = shift;
B::clearsym();
if ($order && $order eq "exec") {
return sub { walkoptree_exec(main_start, "debug") }
} else {
return sub { walkoptree(main_root, "debug") }
}
}
1;
__END__
=head1 NAME
B::Debug - Walk Perl syntax tree, printing debug info about ops
=head1 SYNOPSIS
perl -MO=Debug[,OPTIONS] foo.pl
=head1 DESCRIPTION
See F<ext/B/README> and the newer L<B::Concise>, L<B::Terse>.
=head1 OPTIONS
With option -exec, walks tree in execute order,
otherwise in basic order.
=head1 Changes
1.11 2008-07-14 rurban
avoid B::Flags in CORE tests not to crash on old XS in @INC
1.10 2008-06-28 rurban
require 5.006; Test::More not possible in 5.00505
our => my
1.09 2008-06-18 rurban
minor META.yml syntax fix
5.8.0 ending nextstate test failure: be more tolerant
PREREQ_PM Test::More
1.08 2008-06-17 rurban
support 5.00558 - 5.6.2
1.07 2008-06-16 rurban
debug.t: fix strawberry perl quoting issue
1.06 2008-06-11 rurban
added B::Flags output
dual-life CPAN as B-Debug-1.06 and CORE
protect scalar(@array) if tied arrays leave out FETCHSIZE
1.05_03 2008-04-16 rurban
ithread fixes in B::AV
B-C-1.04_??
B-C-1.04_09 2008-02-24 rurban
support 5.8 (import Asmdata)
1.05_02 2008-02-21 rurban
added _printop
B-C-1.04_08 and CORE
1.05_01 2008-02-05 rurban
5.10 fix for op->seq
B-C-1.04_04
=head1 AUTHOR
Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
Reini Urban C<rurban@cpan.org>
=head1 LICENSE
Copyright (c) 1996, 1997 Malcolm Beattie
Copyright (c) 2008 Reini Urban
This program is free software; you can redistribute it and/or modify
it under the terms of either:
a) the GNU General Public License as published by the Free
Software Foundation; either version 1, or (at your option) any
later version, or
b) the "Artistic License" which comes with this kit.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either
the GNU General Public License or the Artistic License for more details.
You should have received a copy of the Artistic License with this kit,
in the file named "Artistic". If not, you can get one from the Perl
distribution. You should also have received a copy of the GNU General
Public License, in the file named "Copying". If not, you can get one
from the Perl distribution or else write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
=cut
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