[p5sagit/p5-mst-13.2.git] / ext / B / B / Debug.pm

package B::Debug;

our $VERSION = '1.06';

use strict;
use B qw(peekop class walkoptree walkoptree_exec
         main_start main_root cstring sv_undef);
our (@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;
eval { require B::Flags and $have_B_Flags++ };
BEGIN {
    use Config;
    my $ithreads = $Config{'useithreads'} eq 'define';
    eval qq{
	sub ITHREADS() { $ithreads }
	sub VERSION() { $] }
    }; die $@ if $@;
}

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 (VERSION > 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", VERSION < 5.008 ? ${$op->pmreplroot} : $op->pmreplroot;
    printf "\top_pmreplstart\t0x%x\n", ${$op->pmreplstart};
    printf "\top_pmnext\t0x%x\n", ${$op->pmnext} if VERSION < 5.009005;
    if (ITHREADS) {
      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 VERSION >= 5.009;
    printf "\top_pmpermflags\t0x%x\n", $op->pmpermflags if VERSION < 5.009;
    printf "\top_pmdynflags\t0x%x\n", $op->pmdynflags if VERSION < 5.009;
    $op->pmreplroot->debug if VERSION < 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 (ITHREADS) {
      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 VERSION < 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

  1.06  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>

=cut
Commit	Line	Data
a798dbf2	1	package B::Debug;
28b605d8	2
93f00e88	3	our $VERSION = '1.06';
28b605d8	4
a798dbf2	5	use strict;
a798dbf2	6	use B qw(peekop class walkoptree walkoptree_exec
93f00e88	7	main_start main_root cstring sv_undef);
	8	our (@optype, @specialsv_name);
	9	require B;
	10	if ($] < 5.009) {
	11	require B::Asmdata;
	12	B::Asmdata->import qw(@optype @specialsv_name);
	13	} else {
	14	B->import qw(@optype @specialsv_name);
	15	}
	16	my $have_B_Flags;
	17	eval { require B::Flags and $have_B_Flags++ };
c1307613	18	BEGIN {
	19	use Config;
	20	my $ithreads = $Config{'useithreads'} eq 'define';
	21	eval qq{
	22	sub ITHREADS() { $ithreads }
	23	sub VERSION() { $] }
	24	}; die $@ if $@;
	25	}
a798dbf2	26
	27	my %done_gv;
	28
c1307613	29	sub _printop {
	30	my $op = shift;
	31	my $addr = ${$op} ? $op->ppaddr : '';
	32	$addr =~ s/^PL_ppaddr// if $addr;
	33	return sprintf "0x%x %s %s", ${$op}, ${$op} ? class($op) : '', $addr;
	34	}
	35
a798dbf2	36	sub B::OP::debug {
a798dbf2	37	my ($op) = @_;
c1307613	38	printf <<'EOT', class($op), $$op, $op->ppaddr, _printop($op->next), _printop($op->sibling), $op->targ, $op->type;
a798dbf2	39	%s (0x%lx)
a798dbf2	40	op_ppaddr %s
c1307613	41	op_next %s
c1307613	42	op_sibling %s
a798dbf2	43	op_targ %d
a798dbf2	44	op_type %d
7252851f	45	EOT
93f00e88	46	if (VERSION > 5.009) {
85594c31	47	printf <<'EOT', $op->opt;
2814eb74	48	op_opt %d
7252851f	49	EOT
	50	} else {
	51	printf <<'EOT', $op->seq;
	52	op_seq %d
	53	EOT
	54	}
93f00e88	55	if ($have_B_Flags) {
	56	printf <<'EOT', $op->flags, $op->flagspv, $op->private, $op->privatepv;
	57	op_flags %d %s
	58	op_private %d %s
	59	EOT
	60	} else {
	61	printf <<'EOT', $op->flags, $op->private;
a798dbf2	62	op_flags %d
	63	op_private %d
	64	EOT
93f00e88	65	}
a798dbf2	66	}
	67
	68	sub B::UNOP::debug {
	69	my ($op) = @_;
	70	$op->B::OP::debug();
c1307613	71	printf "\top_first\t%s\n", _printop($op->first);
a798dbf2	72	}
	73
	74	sub B::BINOP::debug {
	75	my ($op) = @_;
	76	$op->B::UNOP::debug();
c1307613	77	printf "\top_last \t%s\n", _printop($op->last);
a798dbf2	78	}
a798dbf2	79
ee3e756d	80	sub B::LOOP::debug {
	81	my ($op) = @_;
	82	$op->B::BINOP::debug();
c1307613	83	printf <<'EOT', _printop($op->redoop), _printop($op->nextop), _printop($op->lastop);
	84	op_redoop %s
	85	op_nextop %s
	86	op_lastop %s
ee3e756d	87	EOT
	88	}
	89
a798dbf2	90	sub B::LOGOP::debug {
	91	my ($op) = @_;
	92	$op->B::UNOP::debug();
c1307613	93	printf "\top_other\t%s\n", _printop($op->other);
a798dbf2	94	}
a798dbf2	95
a798dbf2	96	sub B::LISTOP::debug {
	97	my ($op) = @_;
	98	$op->B::BINOP::debug();
c03c2844	99	printf "\top_children\t%d\n", $op->children;
a798dbf2	100	}
	101
	102	sub B::PMOP::debug {
	103	my ($op) = @_;
	104	$op->B::LISTOP::debug();
93f00e88	105	printf "\top_pmreplroot\t0x%x\n", VERSION < 5.008 ? ${$op->pmreplroot} : $op->pmreplroot;
a798dbf2	106	printf "\top_pmreplstart\t0x%x\n", ${$op->pmreplstart};
93f00e88	107	printf "\top_pmnext\t0x%x\n", ${$op->pmnext} if VERSION < 5.009005;
c1307613	108	if (ITHREADS) {
	109	printf "\top_pmstashpv\t%s\n", cstring($op->pmstashpv);
	110	printf "\top_pmoffset\t%d\n", $op->pmoffset;
	111	} else {
	112	printf "\top_pmstash\t%s\n", cstring($op->pmstash);
	113	}
93f00e88	114	printf "\top_precomp\t%s\n", cstring($op->precomp);
a798dbf2	115	printf "\top_pmflags\t0x%x\n", $op->pmflags;
93f00e88	116	printf "\top_reflags\t0x%x\n", $op->reflags if VERSION >= 5.009;
	117	printf "\top_pmpermflags\t0x%x\n", $op->pmpermflags if VERSION < 5.009;
	118	printf "\top_pmdynflags\t0x%x\n", $op->pmdynflags if VERSION < 5.009;
	119	$op->pmreplroot->debug if VERSION < 5.008;
a798dbf2	120	}
	121
	122	sub B::COP::debug {
	123	my ($op) = @_;
	124	$op->B::OP::debug();
6e6a1aef	125	my $cop_io = class($op->io) eq 'SPECIAL' ? '' : $op->io->as_string;
127212b2	126	printf <<'EOT', $op->label, $op->stashpv, $op->file, $op->cop_seq, $op->arybase, $op->line, ${$op->warnings}, cstring($cop_io);
c1307613	127	cop_label "%s"
	128	cop_stashpv "%s"
	129	cop_file "%s"
a798dbf2	130	cop_seq %d
	131	cop_arybase %d
	132	cop_line %d
b295d113	133	cop_warnings 0x%x
6e6a1aef	134	cop_io %s
a798dbf2	135	EOT
a798dbf2	136	}
	137
	138	sub B::SVOP::debug {
	139	my ($op) = @_;
	140	$op->B::OP::debug();
	141	printf "\top_sv\t\t0x%x\n", ${$op->sv};
	142	$op->sv->debug;
	143	}
	144
	145	sub B::PVOP::debug {
	146	my ($op) = @_;
	147	$op->B::OP::debug();
3267896c	148	printf "\top_pv\t\t%s\n", cstring($op->pv);
a798dbf2	149	}
a798dbf2	150
7934575e	151	sub B::PADOP::debug {
a798dbf2	152	my ($op) = @_;
a798dbf2	153	$op->B::OP::debug();
c1307613	154	printf "\top_padix\t%ld\n", $op->padix;
a798dbf2	155	}
a798dbf2	156
a798dbf2	157	sub B::NULL::debug {
	158	my ($sv) = @_;
	159	if ($$sv == ${sv_undef()}) {
	160	print "&sv_undef\n";
	161	} else {
	162	printf "NULL (0x%x)\n", $$sv;
	163	}
	164	}
	165
	166	sub B::SV::debug {
	167	my ($sv) = @_;
	168	if (!$$sv) {
	169	print class($sv), " = NULL\n";
	170	return;
	171	}
	172	printf <<'EOT', class($sv), $$sv, $sv->REFCNT, $sv->FLAGS;
	173	%s (0x%x)
	174	REFCNT %d
	175	FLAGS 0x%x
	176	EOT
	177	}
	178
3267896c	179	sub B::RV::debug {
	180	my ($rv) = @_;
	181	B::SV::debug($rv);
	182	printf <<'EOT', ${$rv->RV};
	183	RV 0x%x
	184	EOT
	185	$rv->RV->debug;
	186	}
	187
a798dbf2	188	sub B::PV::debug {
	189	my ($sv) = @_;
	190	$sv->B::SV::debug();
	191	my $pv = $sv->PV();
	192	printf <<'EOT', cstring($pv), length($pv);
	193	xpv_pv %s
	194	xpv_cur %d
	195	EOT
	196	}
	197
	198	sub B::IV::debug {
	199	my ($sv) = @_;
	200	$sv->B::SV::debug();
	201	printf "\txiv_iv\t\t%d\n", $sv->IV;
	202	}
	203
	204	sub B::NV::debug {
	205	my ($sv) = @_;
	206	$sv->B::IV::debug();
	207	printf "\txnv_nv\t\t%s\n", $sv->NV;
	208	}
	209
	210	sub B::PVIV::debug {
	211	my ($sv) = @_;
	212	$sv->B::PV::debug();
	213	printf "\txiv_iv\t\t%d\n", $sv->IV;
	214	}
	215
	216	sub B::PVNV::debug {
	217	my ($sv) = @_;
	218	$sv->B::PVIV::debug();
	219	printf "\txnv_nv\t\t%s\n", $sv->NV;
	220	}
	221
	222	sub B::PVLV::debug {
	223	my ($sv) = @_;
	224	$sv->B::PVNV::debug();
	225	printf "\txlv_targoff\t%d\n", $sv->TARGOFF;
	226	printf "\txlv_targlen\t%u\n", $sv->TARGLEN;
	227	printf "\txlv_type\t%s\n", cstring(chr($sv->TYPE));
	228	}
	229
	230	sub B::BM::debug {
	231	my ($sv) = @_;
	232	$sv->B::PVNV::debug();
	233	printf "\txbm_useful\t%d\n", $sv->USEFUL;
	234	printf "\txbm_previous\t%u\n", $sv->PREVIOUS;
	235	printf "\txbm_rare\t%s\n", cstring(chr($sv->RARE));
	236	}
	237
	238	sub B::CV::debug {
	239	my ($sv) = @_;
	240	$sv->B::PVNV::debug();
	241	my ($stash) = $sv->STASH;
	242	my ($start) = $sv->START;
	243	my ($root) = $sv->ROOT;
	244	my ($padlist) = $sv->PADLIST;
57843af0	245	my ($file) = $sv->FILE;
a798dbf2	246	my ($gv) = $sv->GV;
a3985cdc	247	printf <<'EOT', $$stash, $$start, $$root, $$gv, $file, $sv->DEPTH, $padlist, ${$sv->OUTSIDE}, $sv->OUTSIDE_SEQ;
a798dbf2	248	STASH 0x%x
	249	START 0x%x
	250	ROOT 0x%x
	251	GV 0x%x
57843af0	252	FILE %s
a798dbf2	253	DEPTH %d
7e107e90	254	PADLIST 0x%x
a798dbf2	255	OUTSIDE 0x%x
a3985cdc	256	OUTSIDE_SEQ %d
a798dbf2	257	EOT
	258	$start->debug if $start;
	259	$root->debug if $root;
	260	$gv->debug if $gv;
a798dbf2	261	$padlist->debug if $padlist;
	262	}
	263
	264	sub B::AV::debug {
	265	my ($av) = @_;
	266	$av->B::SV::debug;
93f00e88	267	# tied arrays may leave out FETCHSIZE
93f00e88	268	my (@array) = eval { $av->ARRAY; };
a798dbf2	269	print "\tARRAY\t\t(", join(", ", map("0x" . $$_, @array)), ")\n";
93f00e88	270	my $fill = eval { scalar(@array) };
	271	if (ITHREADS) {
	272	printf <<'EOT', $fill, $av->MAX, $av->OFF;
7e107e90	273	FILL %d
a798dbf2	274	MAX %d
a798dbf2	275	OFF %d
a798dbf2	276	EOT
93f00e88	277	} else {
	278	printf <<'EOT', $fill, $av->MAX;
	279	FILL %d
	280	MAX %d
	281	EOT
	282	}
	283	printf <<'EOT', $av->AvFLAGS if VERSION < 5.009;
bb7c595b	284	AvFLAGS %d
bb7c595b	285	EOT
a798dbf2	286	}
7e107e90	287
a798dbf2	288	sub B::GV::debug {
	289	my ($gv) = @_;
	290	if ($done_gv{$$gv}++) {
002b978b	291	printf "GV %s::%s\n", $gv->STASH->NAME, $gv->SAFENAME;
a798dbf2	292	return;
	293	}
	294	my ($sv) = $gv->SV;
	295	my ($av) = $gv->AV;
	296	my ($cv) = $gv->CV;
	297	$gv->B::SV::debug;
002b978b	298	printf <<'EOT', $gv->SAFENAME, $gv->STASH->NAME, $gv->STASH, $$sv, $gv->GvREFCNT, $gv->FORM, $$av, ${$gv->HV}, ${$gv->EGV}, $$cv, $gv->CVGEN, $gv->LINE, $gv->FILE, $gv->GvFLAGS;
a798dbf2	299	NAME %s
	300	STASH %s (0x%x)
	301	SV 0x%x
	302	GvREFCNT %d
	303	FORM 0x%x
	304	AV 0x%x
	305	HV 0x%x
	306	EGV 0x%x
	307	CV 0x%x
	308	CVGEN %d
	309	LINE %d
b195d487	310	FILE %s
a798dbf2	311	GvFLAGS 0x%x
	312	EOT
	313	$sv->debug if $sv;
	314	$av->debug if $av;
	315	$cv->debug if $cv;
	316	}
	317
	318	sub B::SPECIAL::debug {
	319	my $sv = shift;
	320	print $specialsv_name[$$sv], "\n";
	321	}
	322
	323	sub compile {
	324	my $order = shift;
2b8dc4d2	325	B::clearsym();
7ebf56ae	326	if ($order && $order eq "exec") {
a798dbf2	327	return sub { walkoptree_exec(main_start, "debug") }
	328	} else {
	329	return sub { walkoptree(main_root, "debug") }
	330	}
	331	}
	332
	333	1;
7f20e9dd	334
	335	__END__
	336
	337	=head1 NAME
	338
	339	B::Debug - Walk Perl syntax tree, printing debug info about ops
	340
	341	=head1 SYNOPSIS
	342
	343	perl -MO=Debug[,OPTIONS] foo.pl
	344
	345	=head1 DESCRIPTION
	346
c1307613	347	See F<ext/B/README> and the newer L<B::Concise>, L<B::Terse>.
	348
	349	=head1 OPTIONS
	350
	351	With option -exec, walks tree in execute order,
	352	otherwise in basic order.
7f20e9dd	353
93f00e88	354	=head1 Changes
	355
	356	1.06 2008-06-11 rurban
	357	added B::Flags output
	358	dual-life CPAN as B-Debug-1.06 and CORE
	359	protect scalar(@array) if tied arrays leave out FETCHSIZE
	360
	361	1.05_03 2008-04-16 rurban
	362	ithread fixes in B::AV
	363	B-C-1.04_??
	364
	365	B-C-1.04_09 2008-02-24 rurban
	366	support 5.8 (import Asmdata)
	367
	368	1.05_02 2008-02-21 rurban
	369	added _printop
	370	B-C-1.04_08 and CORE
	371
	372	1.05_01 2008-02-05 rurban
	373	5.10 fix for op->seq
	374	B-C-1.04_04
	375
7f20e9dd	376	=head1 AUTHOR
	377
	378	Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
93f00e88	379	Reini Urban C<rurban@cpan.org>
7f20e9dd	380
7f20e9dd	381	=cut