av.c Array value code
av.h Array value header
bytecode.h Bytecode header for compiler
-bytecode.pl Produces byterun.h, byterun.c and lib/B/Asmdata.pm
+bytecode.pl Produces byterun.h, byterun.c and ext/B/Asmdata.pm
+byterun.c Runtime support for compiler-generated bytecode
+byterun.h Header for byterun.c
cc_runtime.h Macros need by runtime of compiler-generated code
cflags.SH A script that emits C compilation flags per file
compat3.sym List of symbols for binary-compatibility with 5.003
embed.h Maps symbols to safer names
embed.pl Produces embed.h
embedvar.h C namespace management
+ext/B/B.pm Compiler backend support functions and methods
ext/B/B.xs Compiler backend external subroutines
+ext/B/B/Asmdata.pm Compiler backend data for assembler
+ext/B/B/Assembler.pm Compiler backend assembler support functions
+ext/B/B/Bblock.pm Compiler basic block analysis support
+ext/B/B/Bytecode.pm Compiler Bytecode backend
+ext/B/B/C.pm Compiler C backend
+ext/B/B/CC.pm Compiler CC backend
+ext/B/B/Debug.pm Compiler Debug backend
+ext/B/B/Deparse.pm Compiler Deparse backend
+ext/B/B/Disassembler.pm Compiler Disassembler backend
+ext/B/B/Lint.pm Compiler Lint backend
+ext/B/B/Showlex.pm Compiler Showlex backend
+ext/B/B/Stackobj.pm Compiler stack objects support functions
+ext/B/B/Terse.pm Compiler Terse backend
+ext/B/B/Xref.pm Compiler Xref backend
+ext/B/B/assemble Assemble compiler bytecode
+ext/B/B/cc_harness Simplistic wrapper for using -MO=CC compiler
+ext/B/B/disassemble Disassemble compiler bytecode output
+ext/B/B/makeliblinks Make a simplistic XSUB .so symlink tree for compiler
ext/B/Makefile.PL Compiler backend makefile writer
ext/B/NOTES Compiler backend notes
+ext/B/O.pm Compiler front-end module (-MO=...)
ext/B/README Compiler backend README
ext/B/TESTS Compiler backend test data
ext/B/Todo Compiler backend Todo list
lib/AnyDBM_File.pm Perl module to emulate dbmopen
lib/AutoLoader.pm Autoloader base class
lib/AutoSplit.pm Split up autoload functions
-lib/B.pm Compiler backend support functions and methods
-lib/B/assemble Assemble compiler bytecode
-lib/B/cc_harness Simplistic wrapper for using -MO=CC compiler
-lib/B/disassemble Disassemble compiler bytecode output
-lib/B/makeliblinks Make a simplistic XSUB .so symlink tree for compiler
lib/Benchmark.pm Measure execution time
lib/Bundle/CPAN.pm The CPAN bundle
lib/CGI.pm Web server interface ("Common Gateway Interface")
lib/Net/netent.pm By-name interface to Perl's builtin getnet*
lib/Net/protoent.pm By-name interface to Perl's builtin getproto*
lib/Net/servent.pm By-name interface to Perl's builtin getserv*
-lib/O.pm Compiler front-end module (-MO=...)
lib/Pod/Functions.pm used by pod/splitpod
lib/Pod/Html.pm Convert POD data to HTML
lib/Pod/Text.pm Convert POD data to formatted ASCII text
my $perl_header;
($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;
-unlink "byterun.c", "byterun.h", "lib/B/Asmdata.pm";
+unlink "byterun.c", "byterun.h", "ext/B/Asmdata.pm";
#
# Start with boilerplate for Asmdata.pm
#
-open(ASMDATA_PM, ">lib/B/Asmdata.pm") or die "Asmdata.pm: $!";
+open(ASMDATA_PM, ">ext/B/Asmdata.pm") or die "Asmdata.pm: $!";
print ASMDATA_PM $perl_header, <<'EOT';
package B::Asmdata;
use Exporter;
+++ /dev/null
-# B.pm
-#
-# Copyright (c) 1996, 1997 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-#
-package B;
-require DynaLoader;
-require Exporter;
-@ISA = qw(Exporter DynaLoader);
-@EXPORT_OK = qw(byteload_fh byteload_string minus_c ppname
- class peekop cast_I32 cstring cchar hash threadsv_names
- main_root main_start main_cv svref_2object
- walkoptree walkoptree_slow walkoptree_exec walksymtable
- parents comppadlist sv_undef compile_stats timing_info);
-
-use strict;
-@B::SV::ISA = 'B::OBJECT';
-@B::NULL::ISA = 'B::SV';
-@B::PV::ISA = 'B::SV';
-@B::IV::ISA = 'B::SV';
-@B::NV::ISA = 'B::IV';
-@B::RV::ISA = 'B::SV';
-@B::PVIV::ISA = qw(B::PV B::IV);
-@B::PVNV::ISA = qw(B::PV B::NV);
-@B::PVMG::ISA = 'B::PVNV';
-@B::PVLV::ISA = 'B::PVMG';
-@B::BM::ISA = 'B::PVMG';
-@B::AV::ISA = 'B::PVMG';
-@B::GV::ISA = 'B::PVMG';
-@B::HV::ISA = 'B::PVMG';
-@B::CV::ISA = 'B::PVMG';
-@B::IO::ISA = 'B::CV';
-
-@B::OP::ISA = 'B::OBJECT';
-@B::UNOP::ISA = 'B::OP';
-@B::BINOP::ISA = 'B::UNOP';
-@B::LOGOP::ISA = 'B::UNOP';
-@B::CONDOP::ISA = 'B::UNOP';
-@B::LISTOP::ISA = 'B::BINOP';
-@B::SVOP::ISA = 'B::OP';
-@B::GVOP::ISA = 'B::OP';
-@B::PVOP::ISA = 'B::OP';
-@B::CVOP::ISA = 'B::OP';
-@B::LOOP::ISA = 'B::LISTOP';
-@B::PMOP::ISA = 'B::LISTOP';
-@B::COP::ISA = 'B::OP';
-
-@B::SPECIAL::ISA = 'B::OBJECT';
-
-{
- # Stop "-w" from complaining about the lack of a real B::OBJECT class
- package B::OBJECT;
-}
-
-my $debug;
-my $op_count = 0;
-my @parents = ();
-
-sub debug {
- my ($class, $value) = @_;
- $debug = $value;
- walkoptree_debug($value);
-}
-
-# sub OPf_KIDS;
-# add to .xs for perl5.002
-sub OPf_KIDS () { 4 }
-
-sub class {
- my $obj = shift;
- my $name = ref $obj;
- $name =~ s/^.*:://;
- return $name;
-}
-
-sub parents { \@parents }
-
-# For debugging
-sub peekop {
- my $op = shift;
- return sprintf("%s (0x%x) %s", class($op), $$op, $op->ppaddr);
-}
-
-sub walkoptree_slow {
- my($op, $method, $level) = @_;
- $op_count++; # just for statistics
- $level ||= 0;
- warn(sprintf("walkoptree: %d. %s\n", $level, peekop($op))) if $debug;
- $op->$method($level);
- if ($$op && ($op->flags & OPf_KIDS)) {
- my $kid;
- unshift(@parents, $op);
- for ($kid = $op->first; $$kid; $kid = $kid->sibling) {
- walkoptree_slow($kid, $method, $level + 1);
- }
- shift @parents;
- }
-}
-
-sub compile_stats {
- return "Total number of OPs processed: $op_count\n";
-}
-
-sub timing_info {
- my ($sec, $min, $hr) = localtime;
- my ($user, $sys) = times;
- sprintf("%02d:%02d:%02d user=$user sys=$sys",
- $hr, $min, $sec, $user, $sys);
-}
-
-my %symtable;
-sub savesym {
- my ($obj, $value) = @_;
-# warn(sprintf("savesym: sym_%x => %s\n", $$obj, $value)); # debug
- $symtable{sprintf("sym_%x", $$obj)} = $value;
-}
-
-sub objsym {
- my $obj = shift;
- return $symtable{sprintf("sym_%x", $$obj)};
-}
-
-sub walkoptree_exec {
- my ($op, $method, $level) = @_;
- my ($sym, $ppname);
- my $prefix = " " x $level;
- for (; $$op; $op = $op->next) {
- $sym = objsym($op);
- if (defined($sym)) {
- print $prefix, "goto $sym\n";
- return;
- }
- savesym($op, sprintf("%s (0x%lx)", class($op), $$op));
- $op->$method($level);
- $ppname = $op->ppaddr;
- if ($ppname =~ /^pp_(or|and|mapwhile|grepwhile|entertry)$/) {
- print $prefix, uc($1), " => {\n";
- walkoptree_exec($op->other, $method, $level + 1);
- print $prefix, "}\n";
- } elsif ($ppname eq "pp_match" || $ppname eq "pp_subst") {
- my $pmreplstart = $op->pmreplstart;
- if ($$pmreplstart) {
- print $prefix, "PMREPLSTART => {\n";
- walkoptree_exec($pmreplstart, $method, $level + 1);
- print $prefix, "}\n";
- }
- } elsif ($ppname eq "pp_substcont") {
- print $prefix, "SUBSTCONT => {\n";
- walkoptree_exec($op->other->pmreplstart, $method, $level + 1);
- print $prefix, "}\n";
- $op = $op->other;
- } elsif ($ppname eq "pp_cond_expr") {
- # pp_cond_expr never returns op_next
- print $prefix, "TRUE => {\n";
- walkoptree_exec($op->true, $method, $level + 1);
- print $prefix, "}\n";
- $op = $op->false;
- redo;
- } elsif ($ppname eq "pp_range") {
- print $prefix, "TRUE => {\n";
- walkoptree_exec($op->true, $method, $level + 1);
- print $prefix, "}\n", $prefix, "FALSE => {\n";
- walkoptree_exec($op->false, $method, $level + 1);
- print $prefix, "}\n";
- } elsif ($ppname eq "pp_enterloop") {
- print $prefix, "REDO => {\n";
- walkoptree_exec($op->redoop, $method, $level + 1);
- print $prefix, "}\n", $prefix, "NEXT => {\n";
- walkoptree_exec($op->nextop, $method, $level + 1);
- print $prefix, "}\n", $prefix, "LAST => {\n";
- walkoptree_exec($op->lastop, $method, $level + 1);
- print $prefix, "}\n";
- } elsif ($ppname eq "pp_subst") {
- my $replstart = $op->pmreplstart;
- if ($$replstart) {
- print $prefix, "SUBST => {\n";
- walkoptree_exec($replstart, $method, $level + 1);
- print $prefix, "}\n";
- }
- }
- }
-}
-
-sub walksymtable {
- my ($symref, $method, $recurse, $prefix) = @_;
- my $sym;
- no strict 'vars';
- local(*glob);
- while (($sym, *glob) = each %$symref) {
- if ($sym =~ /::$/) {
- $sym = $prefix . $sym;
- if ($sym ne "main::" && &$recurse($sym)) {
- walksymtable(\%glob, $method, $recurse, $sym);
- }
- } else {
- svref_2object(\*glob)->EGV->$method();
- }
- }
-}
-
-{
- package B::Section;
- my $output_fh;
- my %sections;
-
- sub new {
- my ($class, $section, $symtable, $default) = @_;
- $output_fh ||= FileHandle->new_tmpfile;
- my $obj = bless [-1, $section, $symtable, $default], $class;
- $sections{$section} = $obj;
- return $obj;
- }
-
- sub get {
- my ($class, $section) = @_;
- return $sections{$section};
- }
-
- sub add {
- my $section = shift;
- while (defined($_ = shift)) {
- print $output_fh "$section->[1]\t$_\n";
- $section->[0]++;
- }
- }
-
- sub index {
- my $section = shift;
- return $section->[0];
- }
-
- sub name {
- my $section = shift;
- return $section->[1];
- }
-
- sub symtable {
- my $section = shift;
- return $section->[2];
- }
-
- sub default {
- my $section = shift;
- return $section->[3];
- }
-
- sub output {
- my ($section, $fh, $format) = @_;
- my $name = $section->name;
- my $sym = $section->symtable || {};
- my $default = $section->default;
-
- seek($output_fh, 0, 0);
- while (<$output_fh>) {
- chomp;
- s/^(.*?)\t//;
- if ($1 eq $name) {
- s{(s\\_[0-9a-f]+)} {
- exists($sym->{$1}) ? $sym->{$1} : $default;
- }ge;
- printf $fh $format, $_;
- }
- }
- }
-}
-
-bootstrap B;
-
-1;
+++ /dev/null
-#
-# Copyright (c) 1996, 1997 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-#
-#
-#
-# This file is autogenerated from bytecode.pl. Changes made here will be lost.
-#
-package B::Asmdata;
-use Exporter;
-@ISA = qw(Exporter);
-@EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
-use vars qw(%insn_data @insn_name @optype @specialsv_name);
-
-@optype = qw(OP UNOP BINOP LOGOP CONDOP LISTOP PMOP SVOP GVOP PVOP LOOP COP);
-@specialsv_name = qw(Nullsv &sv_undef &sv_yes &sv_no);
-
-# XXX insn_data is initialised this way because with a large
-# %insn_data = (foo => [...], bar => [...], ...) initialiser
-# I get a hard-to-track-down stack underflow and segfault.
-$insn_data{comment} = [35, \&PUT_comment, "GET_comment"];
-$insn_data{nop} = [10, \&PUT_none, "GET_none"];
-$insn_data{ret} = [0, \&PUT_none, "GET_none"];
-$insn_data{ldsv} = [1, \&PUT_objindex, "GET_objindex"];
-$insn_data{ldop} = [2, \&PUT_objindex, "GET_objindex"];
-$insn_data{stsv} = [3, \&PUT_U32, "GET_U32"];
-$insn_data{stop} = [4, \&PUT_U32, "GET_U32"];
-$insn_data{ldspecsv} = [5, \&PUT_U8, "GET_U8"];
-$insn_data{newsv} = [6, \&PUT_U8, "GET_U8"];
-$insn_data{newop} = [7, \&PUT_U8, "GET_U8"];
-$insn_data{newopn} = [8, \&PUT_U8, "GET_U8"];
-$insn_data{newpv} = [9, \&PUT_PV, "GET_PV"];
-$insn_data{pv_cur} = [11, \&PUT_U32, "GET_U32"];
-$insn_data{pv_free} = [12, \&PUT_none, "GET_none"];
-$insn_data{sv_upgrade} = [13, \&PUT_U8, "GET_U8"];
-$insn_data{sv_refcnt} = [14, \&PUT_U32, "GET_U32"];
-$insn_data{sv_refcnt_add} = [15, \&PUT_I32, "GET_I32"];
-$insn_data{sv_flags} = [16, \&PUT_U32, "GET_U32"];
-$insn_data{xrv} = [17, \&PUT_objindex, "GET_objindex"];
-$insn_data{xpv} = [18, \&PUT_none, "GET_none"];
-$insn_data{xiv32} = [19, \&PUT_I32, "GET_I32"];
-$insn_data{xiv64} = [20, \&PUT_IV64, "GET_IV64"];
-$insn_data{xnv} = [21, \&PUT_double, "GET_double"];
-$insn_data{xlv_targoff} = [22, \&PUT_U32, "GET_U32"];
-$insn_data{xlv_targlen} = [23, \&PUT_U32, "GET_U32"];
-$insn_data{xlv_targ} = [24, \&PUT_objindex, "GET_objindex"];
-$insn_data{xlv_type} = [25, \&PUT_U8, "GET_U8"];
-$insn_data{xbm_useful} = [26, \&PUT_I32, "GET_I32"];
-$insn_data{xbm_previous} = [27, \&PUT_U16, "GET_U16"];
-$insn_data{xbm_rare} = [28, \&PUT_U8, "GET_U8"];
-$insn_data{xfm_lines} = [29, \&PUT_I32, "GET_I32"];
-$insn_data{xio_lines} = [30, \&PUT_I32, "GET_I32"];
-$insn_data{xio_page} = [31, \&PUT_I32, "GET_I32"];
-$insn_data{xio_page_len} = [32, \&PUT_I32, "GET_I32"];
-$insn_data{xio_lines_left} = [33, \&PUT_I32, "GET_I32"];
-$insn_data{xio_top_name} = [34, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{xio_top_gv} = [36, \&PUT_objindex, "GET_objindex"];
-$insn_data{xio_fmt_name} = [37, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{xio_fmt_gv} = [38, \&PUT_objindex, "GET_objindex"];
-$insn_data{xio_bottom_name} = [39, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{xio_bottom_gv} = [40, \&PUT_objindex, "GET_objindex"];
-$insn_data{xio_subprocess} = [41, \&PUT_U16, "GET_U16"];
-$insn_data{xio_type} = [42, \&PUT_U8, "GET_U8"];
-$insn_data{xio_flags} = [43, \&PUT_U8, "GET_U8"];
-$insn_data{xcv_stash} = [44, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_start} = [45, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_root} = [46, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_gv} = [47, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_filegv} = [48, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_depth} = [49, \&PUT_I32, "GET_I32"];
-$insn_data{xcv_padlist} = [50, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_outside} = [51, \&PUT_objindex, "GET_objindex"];
-$insn_data{xcv_flags} = [52, \&PUT_U8, "GET_U8"];
-$insn_data{av_extend} = [53, \&PUT_I32, "GET_I32"];
-$insn_data{av_push} = [54, \&PUT_objindex, "GET_objindex"];
-$insn_data{xav_fill} = [55, \&PUT_I32, "GET_I32"];
-$insn_data{xav_max} = [56, \&PUT_I32, "GET_I32"];
-$insn_data{xav_flags} = [57, \&PUT_U8, "GET_U8"];
-$insn_data{xhv_riter} = [58, \&PUT_I32, "GET_I32"];
-$insn_data{xhv_name} = [59, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{hv_store} = [60, \&PUT_objindex, "GET_objindex"];
-$insn_data{sv_magic} = [61, \&PUT_U8, "GET_U8"];
-$insn_data{mg_obj} = [62, \&PUT_objindex, "GET_objindex"];
-$insn_data{mg_private} = [63, \&PUT_U16, "GET_U16"];
-$insn_data{mg_flags} = [64, \&PUT_U8, "GET_U8"];
-$insn_data{mg_pv} = [65, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{xmg_stash} = [66, \&PUT_objindex, "GET_objindex"];
-$insn_data{gv_fetchpv} = [67, \&PUT_strconst, "GET_strconst"];
-$insn_data{gv_stashpv} = [68, \&PUT_strconst, "GET_strconst"];
-$insn_data{gp_sv} = [69, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_refcnt} = [70, \&PUT_U32, "GET_U32"];
-$insn_data{gp_refcnt_add} = [71, \&PUT_I32, "GET_I32"];
-$insn_data{gp_av} = [72, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_hv} = [73, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_cv} = [74, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_filegv} = [75, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_io} = [76, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_form} = [77, \&PUT_objindex, "GET_objindex"];
-$insn_data{gp_cvgen} = [78, \&PUT_U32, "GET_U32"];
-$insn_data{gp_line} = [79, \&PUT_U16, "GET_U16"];
-$insn_data{gp_share} = [80, \&PUT_objindex, "GET_objindex"];
-$insn_data{xgv_flags} = [81, \&PUT_U8, "GET_U8"];
-$insn_data{op_next} = [82, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_sibling} = [83, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_ppaddr} = [84, \&PUT_strconst, "GET_strconst"];
-$insn_data{op_targ} = [85, \&PUT_U32, "GET_U32"];
-$insn_data{op_type} = [86, \&PUT_U16, "GET_U16"];
-$insn_data{op_seq} = [87, \&PUT_U16, "GET_U16"];
-$insn_data{op_flags} = [88, \&PUT_U8, "GET_U8"];
-$insn_data{op_private} = [89, \&PUT_U8, "GET_U8"];
-$insn_data{op_first} = [90, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_last} = [91, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_other} = [92, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_true} = [93, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_false} = [94, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_children} = [95, \&PUT_U32, "GET_U32"];
-$insn_data{op_pmreplroot} = [96, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_pmreplrootgv} = [97, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_pmreplstart} = [98, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_pmnext} = [99, \&PUT_objindex, "GET_objindex"];
-$insn_data{pregcomp} = [100, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{op_pmflags} = [101, \&PUT_U16, "GET_U16"];
-$insn_data{op_pmpermflags} = [102, \&PUT_U16, "GET_U16"];
-$insn_data{op_sv} = [103, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_gv} = [104, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_pv} = [105, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{op_pv_tr} = [106, \&PUT_op_tr_array, "GET_op_tr_array"];
-$insn_data{op_redoop} = [107, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_nextop} = [108, \&PUT_objindex, "GET_objindex"];
-$insn_data{op_lastop} = [109, \&PUT_objindex, "GET_objindex"];
-$insn_data{cop_label} = [110, \&PUT_pvcontents, "GET_pvcontents"];
-$insn_data{cop_stash} = [111, \&PUT_objindex, "GET_objindex"];
-$insn_data{cop_filegv} = [112, \&PUT_objindex, "GET_objindex"];
-$insn_data{cop_seq} = [113, \&PUT_U32, "GET_U32"];
-$insn_data{cop_arybase} = [114, \&PUT_I32, "GET_I32"];
-$insn_data{cop_line} = [115, \&PUT_U16, "GET_U16"];
-$insn_data{main_start} = [116, \&PUT_objindex, "GET_objindex"];
-$insn_data{main_root} = [117, \&PUT_objindex, "GET_objindex"];
-$insn_data{curpad} = [118, \&PUT_objindex, "GET_objindex"];
-
-my ($insn_name, $insn_data);
-while (($insn_name, $insn_data) = each %insn_data) {
- $insn_name[$insn_data->[0]] = $insn_name;
-}
-# Fill in any gaps
-@insn_name = map($_ || "unused", @insn_name);
-
-1;
+++ /dev/null
-# Assembler.pm
-#
-# Copyright (c) 1996 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-package B::Assembler;
-use Exporter;
-use B qw(ppname);
-use B::Asmdata qw(%insn_data @insn_name);
-
-@ISA = qw(Exporter);
-@EXPORT_OK = qw(assemble_fh assemble_insn strip_comments
- parse_statement uncstring);
-
-use strict;
-my %opnumber;
-my ($i, $opname);
-for ($i = 0; defined($opname = ppname($i)); $i++) {
- $opnumber{$opname} = $i;
-}
-
-my ($linenum, $errors);
-
-sub error {
- my $str = shift;
- warn "$linenum: $str\n";
- $errors++;
-}
-
-my $debug = 0;
-sub debug { $debug = shift }
-
-#
-# First define all the data conversion subs to which Asmdata will refer
-#
-
-sub B::Asmdata::PUT_U8 {
- my $arg = shift;
- my $c = uncstring($arg);
- if (defined($c)) {
- if (length($c) != 1) {
- error "argument for U8 is too long: $c";
- $c = substr($c, 0, 1);
- }
- } else {
- $c = chr($arg);
- }
- return $c;
-}
-
-sub B::Asmdata::PUT_U16 { pack("n", $_[0]) }
-sub B::Asmdata::PUT_U32 { pack("N", $_[0]) }
-sub B::Asmdata::PUT_I32 { pack("N", $_[0]) }
-sub B::Asmdata::PUT_objindex { pack("N", $_[0]) } # could allow names here
-
-sub B::Asmdata::PUT_strconst {
- my $arg = shift;
- $arg = uncstring($arg);
- if (!defined($arg)) {
- error "bad string constant: $arg";
- return "";
- }
- if ($arg =~ s/\0//g) {
- error "string constant argument contains NUL: $arg";
- }
- return $arg . "\0";
-}
-
-sub B::Asmdata::PUT_pvcontents {
- my $arg = shift;
- error "extraneous argument: $arg" if defined $arg;
- return "";
-}
-sub B::Asmdata::PUT_PV {
- my $arg = shift;
- $arg = uncstring($arg);
- error "bad string argument: $arg" unless defined($arg);
- return pack("N", length($arg)) . $arg;
-}
-sub B::Asmdata::PUT_comment {
- my $arg = shift;
- $arg = uncstring($arg);
- error "bad string argument: $arg" unless defined($arg);
- if ($arg =~ s/\n//g) {
- error "comment argument contains linefeed: $arg";
- }
- return $arg . "\n";
-}
-sub B::Asmdata::PUT_double { sprintf("%s\0", $_[0]) }
-sub B::Asmdata::PUT_none {
- my $arg = shift;
- error "extraneous argument: $arg" if defined $arg;
- return "";
-}
-sub B::Asmdata::PUT_op_tr_array {
- my $arg = shift;
- my @ary = split(/\s*,\s*/, $arg);
- if (@ary != 256) {
- error "wrong number of arguments to op_tr_array";
- @ary = (0) x 256;
- }
- return pack("n256", @ary);
-}
-# XXX Check this works
-sub B::Asmdata::PUT_IV64 {
- my $arg = shift;
- return pack("NN", $arg >> 32, $arg & 0xffffffff);
-}
-
-my %unesc = (n => "\n", r => "\r", t => "\t", a => "\a",
- b => "\b", f => "\f", v => "\013");
-
-sub uncstring {
- my $s = shift;
- $s =~ s/^"// and $s =~ s/"$// or return undef;
- $s =~ s/\\(\d\d\d|.)/length($1) == 3 ? chr(oct($1)) : ($unesc{$1}||$1)/eg;
- return $s;
-}
-
-sub strip_comments {
- my $stmt = shift;
- # Comments only allowed in instructions which don't take string arguments
- $stmt =~ s{
- (?sx) # Snazzy extended regexp coming up. Also, treat
- # string as a single line so .* eats \n characters.
- ^\s* # Ignore leading whitespace
- (
- [^"]* # A double quote '"' indicates a string argument. If we
- # find a double quote, the match fails and we strip nothing.
- )
- \s*\# # Any amount of whitespace plus the comment marker...
- .*$ # ...which carries on to end-of-string.
- }{$1}; # Keep only the instruction and optional argument.
- return $stmt;
-}
-
-sub parse_statement {
- my $stmt = shift;
- my ($insn, $arg) = $stmt =~ m{
- (?sx)
- ^\s* # allow (but ignore) leading whitespace
- (.*?) # Instruction continues up until...
- (?: # ...an optional whitespace+argument group
- \s+ # first whitespace.
- (.*) # The argument is all the rest (newlines included).
- )?$ # anchor at end-of-line
- };
- if (defined($arg)) {
- if ($arg =~ s/^0x(?=[0-9a-fA-F]+$)//) {
- $arg = hex($arg);
- } elsif ($arg =~ s/^0(?=[0-7]+$)//) {
- $arg = oct($arg);
- } elsif ($arg =~ /^pp_/) {
- $arg =~ s/\s*$//; # strip trailing whitespace
- my $opnum = $opnumber{$arg};
- if (defined($opnum)) {
- $arg = $opnum;
- } else {
- error qq(No such op type "$arg");
- $arg = 0;
- }
- }
- }
- return ($insn, $arg);
-}
-
-sub assemble_insn {
- my ($insn, $arg) = @_;
- my $data = $insn_data{$insn};
- if (defined($data)) {
- my ($bytecode, $putsub) = @{$data}[0, 1];
- my $argcode = &$putsub($arg);
- return chr($bytecode).$argcode;
- } else {
- error qq(no such instruction "$insn");
- return "";
- }
-}
-
-sub assemble_fh {
- my ($fh, $out) = @_;
- my ($line, $insn, $arg);
- $linenum = 0;
- $errors = 0;
- while ($line = <$fh>) {
- $linenum++;
- chomp $line;
- if ($debug) {
- my $quotedline = $line;
- $quotedline =~ s/\\/\\\\/g;
- $quotedline =~ s/"/\\"/g;
- &$out(assemble_insn("comment", qq("$quotedline")));
- }
- $line = strip_comments($line) or next;
- ($insn, $arg) = parse_statement($line);
- &$out(assemble_insn($insn, $arg));
- if ($debug) {
- &$out(assemble_insn("nop", undef));
- }
- }
- if ($errors) {
- die "Assembly failed with $errors error(s)\n";
- }
-}
-
-1;
+++ /dev/null
-package B::Bblock;
-use Exporter ();
-@ISA = "Exporter";
-@EXPORT_OK = qw(find_leaders);
-
-use B qw(peekop walkoptree walkoptree_exec
- main_root main_start svref_2object);
-use B::Terse;
-use strict;
-
-my $bblock;
-my @bblock_ends;
-
-sub mark_leader {
- my $op = shift;
- if ($$op) {
- $bblock->{$$op} = $op;
- }
-}
-
-sub find_leaders {
- my ($root, $start) = @_;
- $bblock = {};
- mark_leader($start);
- walkoptree($root, "mark_if_leader");
- return $bblock;
-}
-
-# Debugging
-sub walk_bblocks {
- my ($root, $start) = @_;
- my ($op, $lastop, $leader, $bb);
- $bblock = {};
- mark_leader($start);
- walkoptree($root, "mark_if_leader");
- my @leaders = values %$bblock;
- while ($leader = shift @leaders) {
- $lastop = $leader;
- $op = $leader->next;
- while ($$op && !exists($bblock->{$$op})) {
- $bblock->{$$op} = $leader;
- $lastop = $op;
- $op = $op->next;
- }
- push(@bblock_ends, [$leader, $lastop]);
- }
- foreach $bb (@bblock_ends) {
- ($leader, $lastop) = @$bb;
- printf "%s .. %s\n", peekop($leader), peekop($lastop);
- for ($op = $leader; $$op != $$lastop; $op = $op->next) {
- printf " %s\n", peekop($op);
- }
- printf " %s\n", peekop($lastop);
- }
- print "-------\n";
- walkoptree_exec($start, "terse");
-}
-
-sub walk_bblocks_obj {
- my $cvref = shift;
- my $cv = svref_2object($cvref);
- walk_bblocks($cv->ROOT, $cv->START);
-}
-
-sub B::OP::mark_if_leader {}
-
-sub B::COP::mark_if_leader {
- my $op = shift;
- if ($op->label) {
- mark_leader($op);
- }
-}
-
-sub B::LOOP::mark_if_leader {
- my $op = shift;
- mark_leader($op->next);
- mark_leader($op->nextop);
- mark_leader($op->redoop);
- mark_leader($op->lastop->next);
-}
-
-sub B::LOGOP::mark_if_leader {
- my $op = shift;
- my $ppaddr = $op->ppaddr;
- mark_leader($op->next);
- if ($ppaddr eq "pp_entertry") {
- mark_leader($op->other->next);
- } else {
- mark_leader($op->other);
- }
-}
-
-sub B::CONDOP::mark_if_leader {
- my $op = shift;
- mark_leader($op->next);
- mark_leader($op->true);
- mark_leader($op->false);
-}
-
-sub B::PMOP::mark_if_leader {
- my $op = shift;
- if ($op->ppaddr ne "pp_pushre") {
- my $replroot = $op->pmreplroot;
- if ($$replroot) {
- mark_leader($replroot);
- mark_leader($op->next);
- mark_leader($op->pmreplstart);
- }
- }
-}
-
-# PMOP stuff omitted
-
-sub compile {
- my @options = @_;
- if (@options) {
- return sub {
- my $objname;
- foreach $objname (@options) {
- $objname = "main::$objname" unless $objname =~ /::/;
- eval "walk_bblocks_obj(\\&$objname)";
- die "walk_bblocks_obj(\\&$objname) failed: $@" if $@;
- }
- }
- } else {
- return sub { walk_bblocks(main_root, main_start) };
- }
-}
-
-# Basic block leaders:
-# Any COP (pp_nextstate) with a non-NULL label
-# [The op after a pp_enter] Omit
-# [The op after a pp_entersub. Don't count this one.]
-# The ops pointed at by nextop, redoop and lastop->op_next of a LOOP
-# The ops pointed at by op_next and op_other of a LOGOP, except
-# for pp_entertry which has op_next and op_other->op_next
-# The ops pointed at by op_true and op_false of a CONDOP
-# The op pointed at by op_pmreplstart of a PMOP
-# The op pointed at by op_other->op_pmreplstart of pp_substcont?
-# [The op after a pp_return] Omit
-
-1;
+++ /dev/null
-# Bytecode.pm
-#
-# Copyright (c) 1996-1998 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-#
-package B::Bytecode;
-use strict;
-use Carp;
-use IO::File;
-
-use B qw(minus_c main_cv main_root main_start comppadlist
- class peekop walkoptree svref_2object cstring walksymtable);
-use B::Asmdata qw(@optype @specialsv_name);
-use B::Assembler qw(assemble_fh);
-
-my %optype_enum;
-my $i;
-for ($i = 0; $i < @optype; $i++) {
- $optype_enum{$optype[$i]} = $i;
-}
-
-# Following is SVf_POK|SVp_POK
-# XXX Shouldn't be hardwired
-sub POK () { 0x04040000 }
-
-# Following is SVf_IOK|SVp_OK
-# XXX Shouldn't be hardwired
-sub IOK () { 0x01010000 }
-
-my ($verbose, $module_only, $no_assemble, $debug_bc, $debug_cv);
-my $assembler_pid;
-
-# Optimisation options. On the command line, use hyphens instead of
-# underscores for compatibility with gcc-style options. We use
-# underscores here because they are OK in (strict) barewords.
-my ($strip_syntree, $compress_nullops, $omit_seq, $bypass_nullops);
-my %optimise = (strip_syntax_tree => \$strip_syntree,
- compress_nullops => \$compress_nullops,
- omit_sequence_numbers => \$omit_seq,
- bypass_nullops => \$bypass_nullops);
-
-my $nextix = 0;
-my %symtable; # maps object addresses to object indices.
- # Filled in at allocation (newsv/newop) time.
-my %saved; # maps object addresses (for SVish classes) to "saved yet?"
- # flag. Set at FOO::bytecode time usually by SV::bytecode.
- # Manipulated via saved(), mark_saved(), unmark_saved().
-
-my $svix = -1; # we keep track of when the sv register contains an element
- # of the object table to avoid unnecessary repeated
- # consecutive ldsv instructions.
-my $opix = -1; # Ditto for the op register.
-
-sub ldsv {
- my $ix = shift;
- if ($ix != $svix) {
- print "ldsv $ix\n";
- $svix = $ix;
- }
-}
-
-sub stsv {
- my $ix = shift;
- print "stsv $ix\n";
- $svix = $ix;
-}
-
-sub set_svix {
- $svix = shift;
-}
-
-sub ldop {
- my $ix = shift;
- if ($ix != $opix) {
- print "ldop $ix\n";
- $opix = $ix;
- }
-}
-
-sub stop {
- my $ix = shift;
- print "stop $ix\n";
- $opix = $ix;
-}
-
-sub set_opix {
- $opix = shift;
-}
-
-sub pvstring {
- my $str = shift;
- if (defined($str)) {
- return cstring($str . "\0");
- } else {
- return '""';
- }
-}
-
-sub saved { $saved{${$_[0]}} }
-sub mark_saved { $saved{${$_[0]}} = 1 }
-sub unmark_saved { $saved{${$_[0]}} = 0 }
-
-sub debug { $debug_bc = shift }
-
-sub B::OBJECT::nyi {
- my $obj = shift;
- warn sprintf("bytecode save method for %s (0x%x) not yet implemented\n",
- class($obj), $$obj);
-}
-
-#
-# objix may stomp on the op register (for op objects)
-# or the sv register (for SV objects)
-#
-sub B::OBJECT::objix {
- my $obj = shift;
- my $ix = $symtable{$$obj};
- if (defined($ix)) {
- return $ix;
- } else {
- $obj->newix($nextix);
- return $symtable{$$obj} = $nextix++;
- }
-}
-
-sub B::SV::newix {
- my ($sv, $ix) = @_;
- printf "newsv %d\t# %s\n", $sv->FLAGS & 0xf, class($sv);
- stsv($ix);
-}
-
-sub B::GV::newix {
- my ($gv, $ix) = @_;
- my $gvname = $gv->NAME;
- my $name = cstring($gv->STASH->NAME . "::" . $gvname);
- print "gv_fetchpv $name\n";
- stsv($ix);
-}
-
-sub B::HV::newix {
- my ($hv, $ix) = @_;
- my $name = $hv->NAME;
- if ($name) {
- # It's a stash
- printf "gv_stashpv %s\n", cstring($name);
- stsv($ix);
- } else {
- # It's an ordinary HV. Fall back to ordinary newix method
- $hv->B::SV::newix($ix);
- }
-}
-
-sub B::SPECIAL::newix {
- my ($sv, $ix) = @_;
- # Special case. $$sv is not the address of the SV but an
- # index into svspecialsv_list.
- printf "ldspecsv $$sv\t# %s\n", $specialsv_name[$$sv];
- stsv($ix);
-}
-
-sub B::OP::newix {
- my ($op, $ix) = @_;
- my $class = class($op);
- my $typenum = $optype_enum{$class};
- croak "OP::newix: can't understand class $class" unless defined($typenum);
- print "newop $typenum\t# $class\n";
- stop($ix);
-}
-
-sub B::OP::walkoptree_debug {
- my $op = shift;
- warn(sprintf("walkoptree: %s\n", peekop($op)));
-}
-
-sub B::OP::bytecode {
- my $op = shift;
- my $next = $op->next;
- my $nextix;
- my $sibix = $op->sibling->objix;
- my $ix = $op->objix;
- my $type = $op->type;
-
- if ($bypass_nullops) {
- $next = $next->next while $$next && $next->type == 0;
- }
- $nextix = $next->objix;
-
- printf "# %s\n", peekop($op) if $debug_bc;
- ldop($ix);
- print "op_next $nextix\n";
- print "op_sibling $sibix\n" unless $strip_syntree;
- printf "op_type %s\t# %d\n", $op->ppaddr, $type;
- printf("op_seq %d\n", $op->seq) unless $omit_seq;
- if ($type || !$compress_nullops) {
- printf "op_targ %d\nop_flags 0x%x\nop_private 0x%x\n",
- $op->targ, $op->flags, $op->private;
- }
-}
-
-sub B::UNOP::bytecode {
- my $op = shift;
- my $firstix = $op->first->objix;
- $op->B::OP::bytecode;
- if (($op->type || !$compress_nullops) && !$strip_syntree) {
- print "op_first $firstix\n";
- }
-}
-
-sub B::LOGOP::bytecode {
- my $op = shift;
- my $otherix = $op->other->objix;
- $op->B::UNOP::bytecode;
- print "op_other $otherix\n";
-}
-
-sub B::SVOP::bytecode {
- my $op = shift;
- my $sv = $op->sv;
- my $svix = $sv->objix;
- $op->B::OP::bytecode;
- print "op_sv $svix\n";
- $sv->bytecode;
-}
-
-sub B::GVOP::bytecode {
- my $op = shift;
- my $gv = $op->gv;
- my $gvix = $gv->objix;
- $op->B::OP::bytecode;
- print "op_gv $gvix\n";
- $gv->bytecode;
-}
-
-sub B::PVOP::bytecode {
- my $op = shift;
- my $pv = $op->pv;
- $op->B::OP::bytecode;
- #
- # This would be easy except that OP_TRANS uses a PVOP to store an
- # endian-dependent array of 256 shorts instead of a plain string.
- #
- if ($op->ppaddr eq "pp_trans") {
- my @shorts = unpack("s256", $pv); # assembler handles endianness
- print "op_pv_tr ", join(",", @shorts), "\n";
- } else {
- printf "newpv %s\nop_pv\n", pvstring($pv);
- }
-}
-
-sub B::BINOP::bytecode {
- my $op = shift;
- my $lastix = $op->last->objix;
- $op->B::UNOP::bytecode;
- if (($op->type || !$compress_nullops) && !$strip_syntree) {
- print "op_last $lastix\n";
- }
-}
-
-sub B::CONDOP::bytecode {
- my $op = shift;
- my $trueix = $op->true->objix;
- my $falseix = $op->false->objix;
- $op->B::UNOP::bytecode;
- print "op_true $trueix\nop_false $falseix\n";
-}
-
-sub B::LISTOP::bytecode {
- my $op = shift;
- my $children = $op->children;
- $op->B::BINOP::bytecode;
- if (($op->type || !$compress_nullops) && !$strip_syntree) {
- print "op_children $children\n";
- }
-}
-
-sub B::LOOP::bytecode {
- my $op = shift;
- my $redoopix = $op->redoop->objix;
- my $nextopix = $op->nextop->objix;
- my $lastopix = $op->lastop->objix;
- $op->B::LISTOP::bytecode;
- print "op_redoop $redoopix\nop_nextop $nextopix\nop_lastop $lastopix\n";
-}
-
-sub B::COP::bytecode {
- my $op = shift;
- my $stash = $op->stash;
- my $stashix = $stash->objix;
- my $filegv = $op->filegv;
- my $filegvix = $filegv->objix;
- my $line = $op->line;
- if ($debug_bc) {
- printf "# line %s:%d\n", $filegv->SV->PV, $line;
- }
- $op->B::OP::bytecode;
- printf <<"EOT", pvstring($op->label), $op->cop_seq, $op->arybase;
-newpv %s
-cop_label
-cop_stash $stashix
-cop_seq %d
-cop_filegv $filegvix
-cop_arybase %d
-cop_line $line
-EOT
- $filegv->bytecode;
- $stash->bytecode;
-}
-
-sub B::PMOP::bytecode {
- my $op = shift;
- my $replroot = $op->pmreplroot;
- my $replrootix = $replroot->objix;
- my $replstartix = $op->pmreplstart->objix;
- my $ppaddr = $op->ppaddr;
- # pmnext is corrupt in some PMOPs (see misc.t for example)
- #my $pmnextix = $op->pmnext->objix;
-
- if ($$replroot) {
- # OP_PUSHRE (a mutated version of OP_MATCH for the regexp
- # argument to a split) stores a GV in op_pmreplroot instead
- # of a substitution syntax tree. We don't want to walk that...
- if ($ppaddr eq "pp_pushre") {
- $replroot->bytecode;
- } else {
- walkoptree($replroot, "bytecode");
- }
- }
- $op->B::LISTOP::bytecode;
- if ($ppaddr eq "pp_pushre") {
- printf "op_pmreplrootgv $replrootix\n";
- } else {
- print "op_pmreplroot $replrootix\nop_pmreplstart $replstartix\n";
- }
- my $re = pvstring($op->precomp);
- # op_pmnext omitted since a perl bug means it's sometime corrupt
- printf <<"EOT", $op->pmflags, $op->pmpermflags;
-op_pmflags 0x%x
-op_pmpermflags 0x%x
-newpv $re
-pregcomp
-EOT
-}
-
-sub B::SV::bytecode {
- my $sv = shift;
- return if saved($sv);
- my $ix = $sv->objix;
- my $refcnt = $sv->REFCNT;
- my $flags = sprintf("0x%x", $sv->FLAGS);
- ldsv($ix);
- print "sv_refcnt $refcnt\nsv_flags $flags\n";
- mark_saved($sv);
-}
-
-sub B::PV::bytecode {
- my $sv = shift;
- return if saved($sv);
- $sv->B::SV::bytecode;
- printf("newpv %s\nxpv\n", pvstring($sv->PV)) if $sv->FLAGS & POK;
-}
-
-sub B::IV::bytecode {
- my $sv = shift;
- return if saved($sv);
- my $iv = $sv->IVX;
- $sv->B::SV::bytecode;
- printf "%s $iv\n", $sv->needs64bits ? "xiv64" : "xiv32";
-}
-
-sub B::NV::bytecode {
- my $sv = shift;
- return if saved($sv);
- $sv->B::SV::bytecode;
- printf "xnv %s\n", $sv->NVX;
-}
-
-sub B::RV::bytecode {
- my $sv = shift;
- return if saved($sv);
- my $rv = $sv->RV;
- my $rvix = $rv->objix;
- $rv->bytecode;
- $sv->B::SV::bytecode;
- print "xrv $rvix\n";
-}
-
-sub B::PVIV::bytecode {
- my $sv = shift;
- return if saved($sv);
- my $iv = $sv->IVX;
- $sv->B::PV::bytecode;
- printf "%s $iv\n", $sv->needs64bits ? "xiv64" : "xiv32";
-}
-
-sub B::PVNV::bytecode {
- my ($sv, $flag) = @_;
- # The $flag argument is passed through PVMG::bytecode by BM::bytecode
- # and AV::bytecode and indicates special handling. $flag = 1 is used by
- # BM::bytecode and means that we should ensure we save the whole B-M
- # table. It consists of 257 bytes (256 char array plus a final \0)
- # which follow the ordinary PV+\0 and the 257 bytes are *not* reflected
- # in SvCUR. $flag = 2 is used by AV::bytecode and means that we only
- # call SV::bytecode instead of saving PV and calling NV::bytecode since
- # PV/NV/IV stuff is different for AVs.
- return if saved($sv);
- if ($flag == 2) {
- $sv->B::SV::bytecode;
- } else {
- my $pv = $sv->PV;
- $sv->B::IV::bytecode;
- printf "xnv %s\n", $sv->NVX;
- if ($flag == 1) {
- $pv .= "\0" . $sv->TABLE;
- printf "newpv %s\npv_cur %d\nxpv\n", pvstring($pv),length($pv)-257;
- } else {
- printf("newpv %s\nxpv\n", pvstring($pv)) if $sv->FLAGS & POK;
- }
- }
-}
-
-sub B::PVMG::bytecode {
- my ($sv, $flag) = @_;
- # See B::PVNV::bytecode for an explanation of $flag.
- return if saved($sv);
- # XXX We assume SvSTASH is already saved and don't save it later ourselves
- my $stashix = $sv->SvSTASH->objix;
- my @mgchain = $sv->MAGIC;
- my (@mgobjix, $mg);
- #
- # We need to traverse the magic chain and get objix for each OBJ
- # field *before* we do B::PVNV::bytecode since objix overwrites
- # the sv register. However, we need to write the magic-saving
- # bytecode *after* B::PVNV::bytecode since sv isn't initialised
- # to refer to $sv until then.
- #
- @mgobjix = map($_->OBJ->objix, @mgchain);
- $sv->B::PVNV::bytecode($flag);
- print "xmg_stash $stashix\n";
- foreach $mg (@mgchain) {
- printf "sv_magic %s\nmg_obj %d\nnewpv %s\nmg_pv\n",
- cstring($mg->TYPE), shift(@mgobjix), pvstring($mg->PTR);
- }
-}
-
-sub B::PVLV::bytecode {
- my $sv = shift;
- return if saved($sv);
- $sv->B::PVMG::bytecode;
- printf <<'EOT', $sv->TARGOFF, $sv->TARGLEN, cstring($sv->TYPE);
-xlv_targoff %d
-xlv_targlen %d
-xlv_type %s
-EOT
-}
-
-sub B::BM::bytecode {
- my $sv = shift;
- return if saved($sv);
- # See PVNV::bytecode for an explanation of what the argument does
- $sv->B::PVMG::bytecode(1);
- printf "xbm_useful %d\nxbm_previous %d\nxbm_rare %d\n",
- $sv->USEFUL, $sv->PREVIOUS, $sv->RARE;
-}
-
-sub B::GV::bytecode {
- my $gv = shift;
- return if saved($gv);
- my $ix = $gv->objix;
- mark_saved($gv);
- my $gvname = $gv->NAME;
- my $name = cstring($gv->STASH->NAME . "::" . $gvname);
- my $egv = $gv->EGV;
- my $egvix = $egv->objix;
- ldsv($ix);
- printf <<"EOT", $gv->FLAGS, $gv->GvFLAGS, $gv->LINE;
-sv_flags 0x%x
-xgv_flags 0x%x
-gp_line %d
-EOT
- my $refcnt = $gv->REFCNT;
- printf("sv_refcnt_add %d\n", $refcnt - 1) if $refcnt > 1;
- my $gvrefcnt = $gv->GvREFCNT;
- printf("gp_refcnt_add %d\n", $gvrefcnt - 1) if $gvrefcnt > 1;
- if ($gvrefcnt > 1 && $ix != $egvix) {
- print "gp_share $egvix\n";
- } else {
- if ($gvname !~ /^([^A-Za-z]|STDIN|STDOUT|STDERR|ARGV|SIG|ENV)$/) {
- my $i;
- my @subfield_names = qw(SV AV HV CV FILEGV FORM IO);
- my @subfields = map($gv->$_(), @subfield_names);
- my @ixes = map($_->objix, @subfields);
- # Reset sv register for $gv
- ldsv($ix);
- for ($i = 0; $i < @ixes; $i++) {
- printf "gp_%s %d\n", lc($subfield_names[$i]), $ixes[$i];
- }
- # Now save all the subfields
- my $sv;
- foreach $sv (@subfields) {
- $sv->bytecode;
- }
- }
- }
-}
-
-sub B::HV::bytecode {
- my $hv = shift;
- return if saved($hv);
- mark_saved($hv);
- my $name = $hv->NAME;
- my $ix = $hv->objix;
- if (!$name) {
- # It's an ordinary HV. Stashes have NAME set and need no further
- # saving beyond the gv_stashpv that $hv->objix already ensures.
- my @contents = $hv->ARRAY;
- my ($i, @ixes);
- for ($i = 1; $i < @contents; $i += 2) {
- push(@ixes, $contents[$i]->objix);
- }
- for ($i = 1; $i < @contents; $i += 2) {
- $contents[$i]->bytecode;
- }
- ldsv($ix);
- for ($i = 0; $i < @contents; $i += 2) {
- printf("newpv %s\nhv_store %d\n",
- pvstring($contents[$i]), $ixes[$i / 2]);
- }
- printf "sv_refcnt %d\nsv_flags 0x%x\n", $hv->REFCNT, $hv->FLAGS;
- }
-}
-
-sub B::AV::bytecode {
- my $av = shift;
- return if saved($av);
- my $ix = $av->objix;
- my $fill = $av->FILL;
- my $max = $av->MAX;
- my (@array, @ixes);
- if ($fill > -1) {
- @array = $av->ARRAY;
- @ixes = map($_->objix, @array);
- my $sv;
- foreach $sv (@array) {
- $sv->bytecode;
- }
- }
- # See PVNV::bytecode for the meaning of the flag argument of 2.
- $av->B::PVMG::bytecode(2);
- # Recover sv register and set AvMAX and AvFILL to -1 (since we
- # create an AV with NEWSV and SvUPGRADE rather than doing newAV
- # which is what sets AvMAX and AvFILL.
- ldsv($ix);
- printf "xav_flags 0x%x\nxav_max -1\nxav_fill -1\n", $av->AvFLAGS;
- if ($fill > -1) {
- my $elix;
- foreach $elix (@ixes) {
- print "av_push $elix\n";
- }
- } else {
- if ($max > -1) {
- print "av_extend $max\n";
- }
- }
-}
-
-sub B::CV::bytecode {
- my $cv = shift;
- return if saved($cv);
- my $ix = $cv->objix;
- $cv->B::PVMG::bytecode;
- my $i;
- my @subfield_names = qw(ROOT START STASH GV FILEGV PADLIST OUTSIDE);
- my @subfields = map($cv->$_(), @subfield_names);
- my @ixes = map($_->objix, @subfields);
- # Save OP tree from CvROOT (first element of @subfields)
- my $root = shift @subfields;
- if ($$root) {
- walkoptree($root, "bytecode");
- }
- # Reset sv register for $cv (since above ->objix calls stomped on it)
- ldsv($ix);
- for ($i = 0; $i < @ixes; $i++) {
- printf "xcv_%s %d\n", lc($subfield_names[$i]), $ixes[$i];
- }
- printf "xcv_depth %d\nxcv_flags 0x%x\n", $cv->DEPTH, $cv->FLAGS;
- # Now save all the subfields (except for CvROOT which was handled
- # above) and CvSTART (now the initial element of @subfields).
- shift @subfields; # bye-bye CvSTART
- my $sv;
- foreach $sv (@subfields) {
- $sv->bytecode;
- }
-}
-
-sub B::IO::bytecode {
- my $io = shift;
- return if saved($io);
- my $ix = $io->objix;
- my $top_gv = $io->TOP_GV;
- my $top_gvix = $top_gv->objix;
- my $fmt_gv = $io->FMT_GV;
- my $fmt_gvix = $fmt_gv->objix;
- my $bottom_gv = $io->BOTTOM_GV;
- my $bottom_gvix = $bottom_gv->objix;
-
- $io->B::PVMG::bytecode;
- ldsv($ix);
- print "xio_top_gv $top_gvix\n";
- print "xio_fmt_gv $fmt_gvix\n";
- print "xio_bottom_gv $bottom_gvix\n";
- my $field;
- foreach $field (qw(TOP_NAME FMT_NAME BOTTOM_NAME)) {
- printf "newpv %s\nxio_%s\n", pvstring($io->$field()), lc($field);
- }
- foreach $field (qw(LINES PAGE PAGE_LEN LINES_LEFT SUBPROCESS)) {
- printf "xio_%s %d\n", lc($field), $io->$field();
- }
- printf "xio_type %s\nxio_flags 0x%x\n", cstring($io->IoTYPE), $io->IoFLAGS;
- $top_gv->bytecode;
- $fmt_gv->bytecode;
- $bottom_gv->bytecode;
-}
-
-sub B::SPECIAL::bytecode {
- # nothing extra needs doing
-}
-
-sub bytecompile_object {
- my $sv;
- foreach $sv (@_) {
- svref_2object($sv)->bytecode;
- }
-}
-
-sub B::GV::bytecodecv {
- my $gv = shift;
- my $cv = $gv->CV;
- if ($$cv && !saved($cv)) {
- if ($debug_cv) {
- warn sprintf("saving extra CV &%s::%s (0x%x) from GV 0x%x\n",
- $gv->STASH->NAME, $gv->NAME, $$cv, $$gv);
- }
- $gv->bytecode;
- }
-}
-
-sub bytecompile_main {
- my $curpad = (comppadlist->ARRAY)[1];
- my $curpadix = $curpad->objix;
- $curpad->bytecode;
- walkoptree(main_root, "bytecode");
- warn "done main program, now walking symbol table\n" if $debug_bc;
- my ($pack, %exclude);
- foreach $pack (qw(B O AutoLoader DynaLoader Config DB VMS strict vars
- FileHandle Exporter Carp UNIVERSAL IO Fcntl Symbol
- SelectSaver blib Cwd))
- {
- $exclude{$pack."::"} = 1;
- }
- no strict qw(vars refs);
- walksymtable(\%{"main::"}, "bytecodecv", sub {
- warn "considering $_[0]\n" if $debug_bc;
- return !defined($exclude{$_[0]});
- });
- if (!$module_only) {
- printf "main_root %d\n", main_root->objix;
- printf "main_start %d\n", main_start->objix;
- printf "curpad $curpadix\n";
- # XXX Do min_intro_pending and max_intro_pending matter?
- }
-}
-
-sub prepare_assemble {
- my $newfh = IO::File->new_tmpfile;
- select($newfh);
- binmode $newfh;
- return $newfh;
-}
-
-sub do_assemble {
- my $fh = shift;
- seek($fh, 0, 0); # rewind the temporary file
- assemble_fh($fh, sub { print OUT @_ });
-}
-
-sub compile {
- my @options = @_;
- my ($option, $opt, $arg);
- open(OUT, ">&STDOUT");
- binmode OUT;
- select(OUT);
- OPTION:
- while ($option = shift @options) {
- if ($option =~ /^-(.)(.*)/) {
- $opt = $1;
- $arg = $2;
- } else {
- unshift @options, $option;
- last OPTION;
- }
- if ($opt eq "-" && $arg eq "-") {
- shift @options;
- last OPTION;
- } elsif ($opt eq "o") {
- $arg ||= shift @options;
- open(OUT, ">$arg") or return "$arg: $!\n";
- binmode OUT;
- } elsif ($opt eq "D") {
- $arg ||= shift @options;
- foreach $arg (split(//, $arg)) {
- if ($arg eq "b") {
- $| = 1;
- debug(1);
- } elsif ($arg eq "o") {
- B->debug(1);
- } elsif ($arg eq "a") {
- B::Assembler::debug(1);
- } elsif ($arg eq "C") {
- $debug_cv = 1;
- }
- }
- } elsif ($opt eq "v") {
- $verbose = 1;
- } elsif ($opt eq "m") {
- $module_only = 1;
- } elsif ($opt eq "S") {
- $no_assemble = 1;
- } elsif ($opt eq "f") {
- $arg ||= shift @options;
- my $value = $arg !~ s/^no-//;
- $arg =~ s/-/_/g;
- my $ref = $optimise{$arg};
- if (defined($ref)) {
- $$ref = $value;
- } else {
- warn qq(ignoring unknown optimisation option "$arg"\n);
- }
- } elsif ($opt eq "O") {
- $arg = 1 if $arg eq "";
- my $ref;
- foreach $ref (values %optimise) {
- $$ref = 0;
- }
- if ($arg >= 6) {
- $strip_syntree = 1;
- }
- if ($arg >= 2) {
- $bypass_nullops = 1;
- }
- if ($arg >= 1) {
- $compress_nullops = 1;
- $omit_seq = 1;
- }
- }
- }
- if (@options) {
- return sub {
- my $objname;
- my $newfh;
- $newfh = prepare_assemble() unless $no_assemble;
- foreach $objname (@options) {
- eval "bytecompile_object(\\$objname)";
- }
- do_assemble($newfh) unless $no_assemble;
- }
- } else {
- return sub {
- my $newfh;
- $newfh = prepare_assemble() unless $no_assemble;
- bytecompile_main();
- do_assemble($newfh) unless $no_assemble;
- }
- }
-}
-
-1;
+++ /dev/null
-# C.pm
-#
-# Copyright (c) 1996, 1997 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-#
-package B::C;
-use Exporter ();
-@ISA = qw(Exporter);
-@EXPORT_OK = qw(output_all output_boilerplate output_main
- init_sections set_callback save_unused_subs objsym);
-
-use B qw(minus_c sv_undef walkoptree walksymtable main_root main_start peekop
- class cstring cchar svref_2object compile_stats comppadlist hash
- threadsv_names);
-use B::Asmdata qw(@specialsv_name);
-
-use FileHandle;
-use Carp;
-use strict;
-
-my $hv_index = 0;
-my $gv_index = 0;
-my $re_index = 0;
-my $pv_index = 0;
-my $anonsub_index = 0;
-
-my %symtable;
-my $warn_undefined_syms;
-my $verbose;
-my @unused_sub_packages;
-my $nullop_count;
-my $pv_copy_on_grow;
-my ($debug_cops, $debug_av, $debug_cv, $debug_mg);
-
-my @threadsv_names;
-BEGIN {
- @threadsv_names = threadsv_names();
-}
-
-# Code sections
-my ($init, $decl, $symsect, $binopsect, $condopsect, $copsect, $cvopsect,
- $gvopsect, $listopsect, $logopsect, $loopsect, $opsect, $pmopsect,
- $pvopsect, $svopsect, $unopsect, $svsect, $xpvsect, $xpvavsect,
- $xpvhvsect, $xpvcvsect, $xpvivsect, $xpvnvsect, $xpvmgsect, $xpvlvsect,
- $xrvsect, $xpvbmsect, $xpviosect);
-
-sub walk_and_save_optree;
-my $saveoptree_callback = \&walk_and_save_optree;
-sub set_callback { $saveoptree_callback = shift }
-sub saveoptree { &$saveoptree_callback(@_) }
-
-sub walk_and_save_optree {
- my ($name, $root, $start) = @_;
- walkoptree($root, "save");
- return objsym($start);
-}
-
-# Current workaround/fix for op_free() trying to free statically
-# defined OPs is to set op_seq = -1 and check for that in op_free().
-# Instead of hardwiring -1 in place of $op->seq, we use $op_seq
-# so that it can be changed back easily if necessary. In fact, to
-# stop compilers from moaning about a U16 being initialised with an
-# uncast -1 (the printf format is %d so we can't tweak it), we have
-# to "know" that op_seq is a U16 and use 65535. Ugh.
-my $op_seq = 65535;
-
-sub AVf_REAL () { 1 }
-
-# XXX This shouldn't really be hardcoded here but it saves
-# looking up the name of every BASEOP in B::OP
-sub OP_THREADSV () { 345 }
-
-sub savesym {
- my ($obj, $value) = @_;
- my $sym = sprintf("s\\_%x", $$obj);
- $symtable{$sym} = $value;
-}
-
-sub objsym {
- my $obj = shift;
- return $symtable{sprintf("s\\_%x", $$obj)};
-}
-
-sub getsym {
- my $sym = shift;
- my $value;
-
- return 0 if $sym eq "sym_0"; # special case
- $value = $symtable{$sym};
- if (defined($value)) {
- return $value;
- } else {
- warn "warning: undefined symbol $sym\n" if $warn_undefined_syms;
- return "UNUSED";
- }
-}
-
-sub savepv {
- my $pv = shift;
- my $pvsym = 0;
- my $pvmax = 0;
- if ($pv_copy_on_grow) {
- my $cstring = cstring($pv);
- if ($cstring ne "0") { # sic
- $pvsym = sprintf("pv%d", $pv_index++);
- $decl->add(sprintf("static char %s[] = %s;", $pvsym, $cstring));
- }
- } else {
- $pvmax = length($pv) + 1;
- }
- return ($pvsym, $pvmax);
-}
-
-sub B::OP::save {
- my ($op, $level) = @_;
- my $type = $op->type;
- $nullop_count++ unless $type;
- if ($type == OP_THREADSV) {
- # saves looking up ppaddr but it's a bit naughty to hard code this
- $init->add(sprintf("(void)find_threadsv(%s);",
- cstring($threadsv_names[$op->targ])));
- }
- $opsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x",
- ${$op->next}, ${$op->sibling}, $op->ppaddr, $op->targ,
- $type, $op_seq, $op->flags, $op->private));
- savesym($op, sprintf("&op_list[%d]", $opsect->index));
-}
-
-sub B::FAKEOP::new {
- my ($class, %objdata) = @_;
- bless \%objdata, $class;
-}
-
-sub B::FAKEOP::save {
- my ($op, $level) = @_;
- $opsect->add(sprintf("%s, %s, %s, %u, %u, %u, 0x%x, 0x%x",
- $op->next, $op->sibling, $op->ppaddr, $op->targ,
- $op->type, $op_seq, $op->flags, $op->private));
- return sprintf("&op_list[%d]", $opsect->index);
-}
-
-sub B::FAKEOP::next { $_[0]->{"next"} || 0 }
-sub B::FAKEOP::type { $_[0]->{type} || 0}
-sub B::FAKEOP::sibling { $_[0]->{sibling} || 0 }
-sub B::FAKEOP::ppaddr { $_[0]->{ppaddr} || 0 }
-sub B::FAKEOP::targ { $_[0]->{targ} || 0 }
-sub B::FAKEOP::flags { $_[0]->{flags} || 0 }
-sub B::FAKEOP::private { $_[0]->{private} || 0 }
-
-sub B::UNOP::save {
- my ($op, $level) = @_;
- $unopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, ${$op->first}));
- savesym($op, sprintf("(OP*)&unop_list[%d]", $unopsect->index));
-}
-
-sub B::BINOP::save {
- my ($op, $level) = @_;
- $binopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, ${$op->first}, ${$op->last}));
- savesym($op, sprintf("(OP*)&binop_list[%d]", $binopsect->index));
-}
-
-sub B::LISTOP::save {
- my ($op, $level) = @_;
- $listopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, %u",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, ${$op->first}, ${$op->last},
- $op->children));
- savesym($op, sprintf("(OP*)&listop_list[%d]", $listopsect->index));
-}
-
-sub B::LOGOP::save {
- my ($op, $level) = @_;
- $logopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, ${$op->first}, ${$op->other}));
- savesym($op, sprintf("(OP*)&logop_list[%d]", $logopsect->index));
-}
-
-sub B::CONDOP::save {
- my ($op, $level) = @_;
- $condopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, s\\_%x",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, ${$op->first}, ${$op->true},
- ${$op->false}));
- savesym($op, sprintf("(OP*)&condop_list[%d]", $condopsect->index));
-}
-
-sub B::LOOP::save {
- my ($op, $level) = @_;
- #warn sprintf("LOOP: redoop %s, nextop %s, lastop %s\n",
- # peekop($op->redoop), peekop($op->nextop),
- # peekop($op->lastop)); # debug
- $loopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, %u, s\\_%x, s\\_%x, s\\_%x",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, ${$op->first}, ${$op->last},
- $op->children, ${$op->redoop}, ${$op->nextop},
- ${$op->lastop}));
- savesym($op, sprintf("(OP*)&loop_list[%d]", $loopsect->index));
-}
-
-sub B::PVOP::save {
- my ($op, $level) = @_;
- $pvopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, %s",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, cstring($op->pv)));
- savesym($op, sprintf("(OP*)&pvop_list[%d]", $pvopsect->index));
-}
-
-sub B::SVOP::save {
- my ($op, $level) = @_;
- my $svsym = $op->sv->save;
- $svopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, %s",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, "(SV*)$svsym"));
- savesym($op, sprintf("(OP*)&svop_list[%d]", $svopsect->index));
-}
-
-sub B::GVOP::save {
- my ($op, $level) = @_;
- my $gvsym = $op->gv->save;
- $gvopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, Nullgv",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private));
- $init->add(sprintf("gvop_list[%d].op_gv = %s;", $gvopsect->index, $gvsym));
- savesym($op, sprintf("(OP*)&gvop_list[%d]", $gvopsect->index));
-}
-
-sub B::COP::save {
- my ($op, $level) = @_;
- my $gvsym = $op->filegv->save;
- my $stashsym = $op->stash->save;
- warn sprintf("COP: line %d file %s\n", $op->line, $op->filegv->SV->PV)
- if $debug_cops;
- $copsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, %s, Nullhv, Nullgv, %u, %d, %u",
- ${$op->next}, ${$op->sibling}, $op->ppaddr,
- $op->targ, $op->type, $op_seq, $op->flags,
- $op->private, cstring($op->label), $op->cop_seq,
- $op->arybase, $op->line));
- my $copix = $copsect->index;
- $init->add(sprintf("cop_list[%d].cop_filegv = %s;", $copix, $gvsym),
- sprintf("cop_list[%d].cop_stash = %s;", $copix, $stashsym));
- savesym($op, "(OP*)&cop_list[$copix]");
-}
-
-sub B::PMOP::save {
- my ($op, $level) = @_;
- my $replroot = $op->pmreplroot;
- my $replstart = $op->pmreplstart;
- my $replrootfield = sprintf("s\\_%x", $$replroot);
- my $replstartfield = sprintf("s\\_%x", $$replstart);
- my $gvsym;
- my $ppaddr = $op->ppaddr;
- if ($$replroot) {
- # OP_PUSHRE (a mutated version of OP_MATCH for the regexp
- # argument to a split) stores a GV in op_pmreplroot instead
- # of a substitution syntax tree. We don't want to walk that...
- if ($ppaddr eq "pp_pushre") {
- $gvsym = $replroot->save;
-# warn "PMOP::save saving a pp_pushre with GV $gvsym\n"; # debug
- $replrootfield = 0;
- } else {
- $replstartfield = saveoptree("*ignore*", $replroot, $replstart);
- }
- }
- # pmnext handling is broken in perl itself, I think. Bad op_pmnext
- # fields aren't noticed in perl's runtime (unless you try reset) but we
- # segfault when trying to dereference it to find op->op_pmnext->op_type
- $pmopsect->add(sprintf("s\\_%x, s\\_%x, %s, %u, %u, %u, 0x%x, 0x%x, s\\_%x, s\\_%x, %u, %s, %s, 0, 0, 0x%x, 0x%x",
- ${$op->next}, ${$op->sibling}, $ppaddr, $op->targ,
- $op->type, $op_seq, $op->flags, $op->private,
- ${$op->first}, ${$op->last}, $op->children,
- $replrootfield, $replstartfield,
- $op->pmflags, $op->pmpermflags,));
- my $pm = sprintf("pmop_list[%d]", $pmopsect->index);
- my $re = $op->precomp;
- if (defined($re)) {
- my $resym = sprintf("re%d", $re_index++);
- $decl->add(sprintf("static char *$resym = %s;", cstring($re)));
- $init->add(sprintf("$pm.op_pmregexp = pregcomp($resym, $resym + %u, &$pm);",
- length($re)));
- }
- if ($gvsym) {
- $init->add("$pm.op_pmreplroot = (OP*)$gvsym;");
- }
- savesym($op, sprintf("(OP*)&pmop_list[%d]", $pmopsect->index));
-}
-
-sub B::SPECIAL::save {
- my ($sv) = @_;
- # special case: $$sv is not the address but an index into specialsv_list
-# warn "SPECIAL::save specialsv $$sv\n"; # debug
- my $sym = $specialsv_name[$$sv];
- if (!defined($sym)) {
- confess "unknown specialsv index $$sv passed to B::SPECIAL::save";
- }
- return $sym;
-}
-
-sub B::OBJECT::save {}
-
-sub B::NULL::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
-# warn "Saving SVt_NULL SV\n"; # debug
- # debug
- #if ($$sv == 0) {
- # warn "NULL::save for sv = 0 called from @{[(caller(1))[3]]}\n";
- #}
- $svsect->add(sprintf("0, %u, 0x%x", $sv->REFCNT + 1, $sv->FLAGS));
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::IV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- $xpvivsect->add(sprintf("0, 0, 0, %d", $sv->IVX));
- $svsect->add(sprintf("&xpviv_list[%d], %lu, 0x%x",
- $xpvivsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::NV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- $xpvnvsect->add(sprintf("0, 0, 0, %d, %s", $sv->IVX, $sv->NVX));
- $svsect->add(sprintf("&xpvnv_list[%d], %lu, 0x%x",
- $xpvnvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::PVLV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- my $pv = $sv->PV;
- my $len = length($pv);
- my ($pvsym, $pvmax) = savepv($pv);
- my ($lvtarg, $lvtarg_sym);
- $xpvlvsect->add(sprintf("%s, %u, %u, %d, %g, 0, 0, %u, %u, 0, %s",
- $pvsym, $len, $pvmax, $sv->IVX, $sv->NVX,
- $sv->TARGOFF, $sv->TARGLEN, cchar($sv->TYPE)));
- $svsect->add(sprintf("&xpvlv_list[%d], %lu, 0x%x",
- $xpvlvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- if (!$pv_copy_on_grow) {
- $init->add(sprintf("xpvlv_list[%d].xpv_pv = savepvn(%s, %u);",
- $xpvlvsect->index, cstring($pv), $len));
- }
- $sv->save_magic;
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::PVIV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- my $pv = $sv->PV;
- my $len = length($pv);
- my ($pvsym, $pvmax) = savepv($pv);
- $xpvivsect->add(sprintf("%s, %u, %u, %d", $pvsym, $len, $pvmax, $sv->IVX));
- $svsect->add(sprintf("&xpviv_list[%d], %u, 0x%x",
- $xpvivsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- if (!$pv_copy_on_grow) {
- $init->add(sprintf("xpviv_list[%d].xpv_pv = savepvn(%s, %u);",
- $xpvivsect->index, cstring($pv), $len));
- }
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::PVNV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- my $pv = $sv->PV;
- my $len = length($pv);
- my ($pvsym, $pvmax) = savepv($pv);
- $xpvnvsect->add(sprintf("%s, %u, %u, %d, %s",
- $pvsym, $len, $pvmax, $sv->IVX, $sv->NVX));
- $svsect->add(sprintf("&xpvnv_list[%d], %lu, 0x%x",
- $xpvnvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- if (!$pv_copy_on_grow) {
- $init->add(sprintf("xpvnv_list[%d].xpv_pv = savepvn(%s,%u);",
- $xpvnvsect->index, cstring($pv), $len));
- }
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::BM::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- my $pv = $sv->PV . "\0" . $sv->TABLE;
- my $len = length($pv);
- $xpvbmsect->add(sprintf("0, %u, %u, %d, %s, 0, 0, %d, %u, 0x%x",
- $len, $len + 258, $sv->IVX, $sv->NVX,
- $sv->USEFUL, $sv->PREVIOUS, $sv->RARE));
- $svsect->add(sprintf("&xpvbm_list[%d], %lu, 0x%x",
- $xpvbmsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- $sv->save_magic;
- $init->add(sprintf("xpvbm_list[%d].xpv_pv = savepvn(%s, %u);",
- $xpvbmsect->index, cstring($pv), $len),
- sprintf("xpvbm_list[%d].xpv_cur = %u;",
- $xpvbmsect->index, $len - 257));
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::PV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- my $pv = $sv->PV;
- my $len = length($pv);
- my ($pvsym, $pvmax) = savepv($pv);
- $xpvsect->add(sprintf("%s, %u, %u", $pvsym, $len, $pvmax));
- $svsect->add(sprintf("&xpv_list[%d], %lu, 0x%x",
- $xpvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- if (!$pv_copy_on_grow) {
- $init->add(sprintf("xpv_list[%d].xpv_pv = savepvn(%s, %u);",
- $xpvsect->index, cstring($pv), $len));
- }
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub B::PVMG::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- my $pv = $sv->PV;
- my $len = length($pv);
- my ($pvsym, $pvmax) = savepv($pv);
- $xpvmgsect->add(sprintf("%s, %u, %u, %d, %s, 0, 0",
- $pvsym, $len, $pvmax, $sv->IVX, $sv->NVX));
- $svsect->add(sprintf("&xpvmg_list[%d], %lu, 0x%x",
- $xpvmgsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- if (!$pv_copy_on_grow) {
- $init->add(sprintf("xpvmg_list[%d].xpv_pv = savepvn(%s, %u);",
- $xpvmgsect->index, cstring($pv), $len));
- }
- $sym = savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
- $sv->save_magic;
- return $sym;
-}
-
-sub B::PVMG::save_magic {
- my ($sv) = @_;
- #warn sprintf("saving magic for %s (0x%x)\n", class($sv), $$sv); # debug
- my $stash = $sv->SvSTASH;
- if ($$stash) {
- warn sprintf("xmg_stash = %s (0x%x)\n", $stash->NAME, $$stash)
- if $debug_mg;
- # XXX Hope stash is already going to be saved.
- $init->add(sprintf("SvSTASH(s\\_%x) = s\\_%x;", $$sv, $$stash));
- }
- my @mgchain = $sv->MAGIC;
- my ($mg, $type, $obj, $ptr);
- foreach $mg (@mgchain) {
- $type = $mg->TYPE;
- $obj = $mg->OBJ;
- $ptr = $mg->PTR;
- my $len = defined($ptr) ? length($ptr) : 0;
- if ($debug_mg) {
- warn sprintf("magic %s (0x%x), obj %s (0x%x), type %s, ptr %s\n",
- class($sv), $$sv, class($obj), $$obj,
- cchar($type), cstring($ptr));
- }
- $init->add(sprintf("sv_magic((SV*)s\\_%x, (SV*)s\\_%x, %s, %s, %d);",
- $$sv, $$obj, cchar($type),cstring($ptr),$len));
- }
-}
-
-sub B::RV::save {
- my ($sv) = @_;
- my $sym = objsym($sv);
- return $sym if defined $sym;
- $xrvsect->add($sv->RV->save);
- $svsect->add(sprintf("&xrv_list[%d], %lu, 0x%x",
- $xrvsect->index, $sv->REFCNT + 1, $sv->FLAGS));
- return savesym($sv, sprintf("&sv_list[%d]", $svsect->index));
-}
-
-sub try_autoload {
- my ($cvstashname, $cvname) = @_;
- warn sprintf("No definition for sub %s::%s\n", $cvstashname, $cvname);
- # Handle AutoLoader classes explicitly. Any more general AUTOLOAD
- # use should be handled by the class itself.
- no strict 'refs';
- my $isa = \@{"$cvstashname\::ISA"};
- if (grep($_ eq "AutoLoader", @$isa)) {
- warn "Forcing immediate load of sub derived from AutoLoader\n";
- # Tweaked version of AutoLoader::AUTOLOAD
- my $dir = $cvstashname;
- $dir =~ s(::)(/)g;
- eval { require "auto/$dir/$cvname.al" };
- if ($@) {
- warn qq(failed require "auto/$dir/$cvname.al": $@\n);
- return 0;
- } else {
- return 1;
- }
- }
-}
-
-sub B::CV::save {
- my ($cv) = @_;
- my $sym = objsym($cv);
- if (defined($sym)) {
-# warn sprintf("CV 0x%x already saved as $sym\n", $$cv); # debug
- return $sym;
- }
- # Reserve a place in svsect and xpvcvsect and record indices
- my $sv_ix = $svsect->index + 1;
- $svsect->add("svix$sv_ix");
- my $xpvcv_ix = $xpvcvsect->index + 1;
- $xpvcvsect->add("xpvcvix$xpvcv_ix");
- # Save symbol now so that GvCV() doesn't recurse back to us via CvGV()
- $sym = savesym($cv, "&sv_list[$sv_ix]");
- warn sprintf("saving CV 0x%x as $sym\n", $$cv) if $debug_cv;
- my $gv = $cv->GV;
- my $cvstashname = $gv->STASH->NAME;
- my $cvname = $gv->NAME;
- my $root = $cv->ROOT;
- my $cvxsub = $cv->XSUB;
- if (!$$root && !$cvxsub) {
- if (try_autoload($cvstashname, $cvname)) {
- # Recalculate root and xsub
- $root = $cv->ROOT;
- $cvxsub = $cv->XSUB;
- if ($$root || $cvxsub) {
- warn "Successful forced autoload\n";
- }
- }
- }
- my $startfield = 0;
- my $padlist = $cv->PADLIST;
- my $pv = $cv->PV;
- my $xsub = 0;
- my $xsubany = "Nullany";
- if ($$root) {
- warn sprintf("saving op tree for CV 0x%x, root = 0x%x\n",
- $$cv, $$root) if $debug_cv;
- my $ppname = "";
- if ($$gv) {
- my $stashname = $gv->STASH->NAME;
- my $gvname = $gv->NAME;
- if ($gvname ne "__ANON__") {
- $ppname = (${$gv->FORM} == $$cv) ? "pp_form_" : "pp_sub_";
- $ppname .= ($stashname eq "main") ?
- $gvname : "$stashname\::$gvname";
- $ppname =~ s/::/__/g;
- }
- }
- if (!$ppname) {
- $ppname = "pp_anonsub_$anonsub_index";
- $anonsub_index++;
- }
- $startfield = saveoptree($ppname, $root, $cv->START, $padlist->ARRAY);
- warn sprintf("done saving op tree for CV 0x%x, name %s, root 0x%x\n",
- $$cv, $ppname, $$root) if $debug_cv;
- if ($$padlist) {
- warn sprintf("saving PADLIST 0x%x for CV 0x%x\n",
- $$padlist, $$cv) if $debug_cv;
- $padlist->save;
- warn sprintf("done saving PADLIST 0x%x for CV 0x%x\n",
- $$padlist, $$cv) if $debug_cv;
- }
- }
- elsif ($cvxsub) {
- $xsubany = sprintf("ANYINIT((void*)0x%x)", $cv->XSUBANY);
- # Try to find out canonical name of XSUB function from EGV.
- # XXX Doesn't work for XSUBs with PREFIX set (or anyone who
- # calls newXS() manually with weird arguments).
- my $egv = $gv->EGV;
- my $stashname = $egv->STASH->NAME;
- $stashname =~ s/::/__/g;
- $xsub = sprintf("XS_%s_%s", $stashname, $egv->NAME);
- $decl->add("void $xsub _((CV*));");
- }
- else {
- warn sprintf("No definition for sub %s::%s (unable to autoload)\n",
- $cvstashname, $cvname); # debug
- }
- $symsect->add(sprintf("xpvcvix%d\t%s, %u, 0, %d, %s, 0, Nullhv, Nullhv, %s, s\\_%x, $xsub, $xsubany, Nullgv, Nullgv, %d, s\\_%x, (CV*)s\\_%x, 0",
- $xpvcv_ix, cstring($pv), length($pv), $cv->IVX,
- $cv->NVX, $startfield, ${$cv->ROOT}, $cv->DEPTH,
- $$padlist, ${$cv->OUTSIDE}));
- if ($$gv) {
- $gv->save;
- $init->add(sprintf("CvGV(s\\_%x) = s\\_%x;",$$cv,$$gv));
- warn sprintf("done saving GV 0x%x for CV 0x%x\n",
- $$gv, $$cv) if $debug_cv;
- }
- my $filegv = $cv->FILEGV;
- if ($$filegv) {
- $filegv->save;
- $init->add(sprintf("CvFILEGV(s\\_%x) = s\\_%x;", $$cv, $$filegv));
- warn sprintf("done saving FILEGV 0x%x for CV 0x%x\n",
- $$filegv, $$cv) if $debug_cv;
- }
- my $stash = $cv->STASH;
- if ($$stash) {
- $stash->save;
- $init->add(sprintf("CvSTASH(s\\_%x) = s\\_%x;", $$cv, $$stash));
- warn sprintf("done saving STASH 0x%x for CV 0x%x\n",
- $$stash, $$cv) if $debug_cv;
- }
- $symsect->add(sprintf("svix%d\t(XPVCV*)&xpvcv_list[%u], %lu, 0x%x",
- $sv_ix, $xpvcv_ix, $cv->REFCNT + 1, $cv->FLAGS));
- return $sym;
-}
-
-sub B::GV::save {
- my ($gv) = @_;
- my $sym = objsym($gv);
- if (defined($sym)) {
- #warn sprintf("GV 0x%x already saved as $sym\n", $$gv); # debug
- return $sym;
- } else {
- my $ix = $gv_index++;
- $sym = savesym($gv, "gv_list[$ix]");
- #warn sprintf("Saving GV 0x%x as $sym\n", $$gv); # debug
- }
- my $gvname = $gv->NAME;
- my $name = cstring($gv->STASH->NAME . "::" . $gvname);
- #warn "GV name is $name\n"; # debug
- my $egv = $gv->EGV;
- my $egvsym;
- if ($$gv != $$egv) {
- #warn(sprintf("EGV name is %s, saving it now\n",
- # $egv->STASH->NAME . "::" . $egv->NAME)); # debug
- $egvsym = $egv->save;
- }
- $init->add(qq[$sym = gv_fetchpv($name, TRUE, SVt_PV);],
- sprintf("SvFLAGS($sym) = 0x%x;", $gv->FLAGS),
- sprintf("GvFLAGS($sym) = 0x%x;", $gv->GvFLAGS),
- sprintf("GvLINE($sym) = %u;", $gv->LINE));
- # Shouldn't need to do save_magic since gv_fetchpv handles that
- #$gv->save_magic;
- my $refcnt = $gv->REFCNT + 1;
- $init->add(sprintf("SvREFCNT($sym) += %u;", $refcnt - 1)) if $refcnt > 1;
- my $gvrefcnt = $gv->GvREFCNT;
- if ($gvrefcnt > 1) {
- $init->add(sprintf("GvREFCNT($sym) += %u;", $gvrefcnt - 1));
- }
- if (defined($egvsym)) {
- # Shared glob *foo = *bar
- $init->add("gp_free($sym);",
- "GvGP($sym) = GvGP($egvsym);");
- } elsif ($gvname !~ /^([^A-Za-z]|STDIN|STDOUT|STDERR|ARGV|SIG|ENV)$/) {
- # Don't save subfields of special GVs (*_, *1, *# and so on)
-# warn "GV::save saving subfields\n"; # debug
- my $gvsv = $gv->SV;
- if ($$gvsv) {
- $init->add(sprintf("GvSV($sym) = s\\_%x;", $$gvsv));
-# warn "GV::save \$$name\n"; # debug
- $gvsv->save;
- }
- my $gvav = $gv->AV;
- if ($$gvav) {
- $init->add(sprintf("GvAV($sym) = s\\_%x;", $$gvav));
-# warn "GV::save \@$name\n"; # debug
- $gvav->save;
- }
- my $gvhv = $gv->HV;
- if ($$gvhv) {
- $init->add(sprintf("GvHV($sym) = s\\_%x;", $$gvhv));
-# warn "GV::save \%$name\n"; # debug
- $gvhv->save;
- }
- my $gvcv = $gv->CV;
- if ($$gvcv) {
- $init->add(sprintf("GvCV($sym) = (CV*)s\\_%x;", $$gvcv));
-# warn "GV::save &$name\n"; # debug
- $gvcv->save;
- }
- my $gvfilegv = $gv->FILEGV;
- if ($$gvfilegv) {
- $init->add(sprintf("GvFILEGV($sym) = s\\_%x;",$$gvfilegv));
-# warn "GV::save GvFILEGV(*$name)\n"; # debug
- $gvfilegv->save;
- }
- my $gvform = $gv->FORM;
- if ($$gvform) {
- $init->add(sprintf("GvFORM($sym) = (CV*)s\\_%x;", $$gvform));
-# warn "GV::save GvFORM(*$name)\n"; # debug
- $gvform->save;
- }
- my $gvio = $gv->IO;
- if ($$gvio) {
- $init->add(sprintf("GvIOp($sym) = s\\_%x;", $$gvio));
-# warn "GV::save GvIO(*$name)\n"; # debug
- $gvio->save;
- }
- }
- return $sym;
-}
-sub B::AV::save {
- my ($av) = @_;
- my $sym = objsym($av);
- return $sym if defined $sym;
- my $avflags = $av->AvFLAGS;
- $xpvavsect->add(sprintf("0, -1, -1, 0, 0.0, 0, Nullhv, 0, 0, 0x%x",
- $avflags));
- $svsect->add(sprintf("&xpvav_list[%d], %lu, 0x%x",
- $xpvavsect->index, $av->REFCNT + 1, $av->FLAGS));
- my $sv_list_index = $svsect->index;
- my $fill = $av->FILL;
- $av->save_magic;
- warn sprintf("saving AV 0x%x FILL=$fill AvFLAGS=0x%x", $$av, $avflags)
- if $debug_av;
- # XXX AVf_REAL is wrong test: need to save comppadlist but not stack
- #if ($fill > -1 && ($avflags & AVf_REAL)) {
- if ($fill > -1) {
- my @array = $av->ARRAY;
- if ($debug_av) {
- my $el;
- my $i = 0;
- foreach $el (@array) {
- warn sprintf("AV 0x%x[%d] = %s 0x%x\n",
- $$av, $i++, class($el), $$el);
- }
- }
- my @names = map($_->save, @array);
- # XXX Better ways to write loop?
- # Perhaps svp[0] = ...; svp[1] = ...; svp[2] = ...;
- # Perhaps I32 i = 0; svp[i++] = ...; svp[i++] = ...; svp[i++] = ...;
- $init->add("{",
- "\tSV **svp;",
- "\tAV *av = (AV*)&sv_list[$sv_list_index];",
- "\tav_extend(av, $fill);",
- "\tsvp = AvARRAY(av);",
- map("\t*svp++ = (SV*)$_;", @names),
- "\tAvFILLp(av) = $fill;",
- "}");
- } else {
- my $max = $av->MAX;
- $init->add("av_extend((AV*)&sv_list[$sv_list_index], $max);")
- if $max > -1;
- }
- return savesym($av, "(AV*)&sv_list[$sv_list_index]");
-}
-
-sub B::HV::save {
- my ($hv) = @_;
- my $sym = objsym($hv);
- return $sym if defined $sym;
- my $name = $hv->NAME;
- if ($name) {
- # It's a stash
-
- # A perl bug means HvPMROOT isn't altered when a PMOP is freed. Usually
- # the only symptom is that sv_reset tries to reset the PMf_USED flag of
- # a trashed op but we look at the trashed op_type and segfault.
- #my $adpmroot = ${$hv->PMROOT};
- my $adpmroot = 0;
- $decl->add("static HV *hv$hv_index;");
- # XXX Beware of weird package names containing double-quotes, \n, ...?
- $init->add(qq[hv$hv_index = gv_stashpv("$name", TRUE);]);
- if ($adpmroot) {
- $init->add(sprintf("HvPMROOT(hv$hv_index) = (PMOP*)s\\_%x;",
- $adpmroot));
- }
- $sym = savesym($hv, "hv$hv_index");
- $hv_index++;
- return $sym;
- }
- # It's just an ordinary HV
- $xpvhvsect->add(sprintf("0, 0, %d, 0, 0.0, 0, Nullhv, %d, 0, 0, 0",
- $hv->MAX, $hv->RITER));
- $svsect->add(sprintf("&xpvhv_list[%d], %lu, 0x%x",
- $xpvhvsect->index, $hv->REFCNT + 1, $hv->FLAGS));
- my $sv_list_index = $svsect->index;
- my @contents = $hv->ARRAY;
- if (@contents) {
- my $i;
- for ($i = 1; $i < @contents; $i += 2) {
- $contents[$i] = $contents[$i]->save;
- }
- $init->add("{", "\tHV *hv = (HV*)&sv_list[$sv_list_index];");
- while (@contents) {
- my ($key, $value) = splice(@contents, 0, 2);
- $init->add(sprintf("\thv_store(hv, %s, %u, %s, %s);",
- cstring($key),length($key),$value, hash($key)));
- }
- $init->add("}");
- }
- return savesym($hv, "(HV*)&sv_list[$sv_list_index]");
-}
-
-sub B::IO::save {
- my ($io) = @_;
- my $sym = objsym($io);
- return $sym if defined $sym;
- my $pv = $io->PV;
- my $len = length($pv);
- $xpviosect->add(sprintf("0, %u, %u, %d, %s, 0, 0, 0, 0, 0, %d, %d, %d, %d, %s, Nullgv, %s, Nullgv, %s, Nullgv, %d, %s, 0x%x",
- $len, $len+1, $io->IVX, $io->NVX, $io->LINES,
- $io->PAGE, $io->PAGE_LEN, $io->LINES_LEFT,
- cstring($io->TOP_NAME), cstring($io->FMT_NAME),
- cstring($io->BOTTOM_NAME), $io->SUBPROCESS,
- cchar($io->IoTYPE), $io->IoFLAGS));
- $svsect->add(sprintf("&xpvio_list[%d], %lu, 0x%x",
- $xpviosect->index, $io->REFCNT + 1, $io->FLAGS));
- $sym = savesym($io, sprintf("(IO*)&sv_list[%d]", $svsect->index));
- my ($field, $fsym);
- foreach $field (qw(TOP_GV FMT_GV BOTTOM_GV)) {
- $fsym = $io->$field();
- if ($$fsym) {
- $init->add(sprintf("Io$field($sym) = (GV*)s\\_%x;", $$fsym));
- $fsym->save;
- }
- }
- $io->save_magic;
- return $sym;
-}
-
-sub B::SV::save {
- my $sv = shift;
- # This is where we catch an honest-to-goodness Nullsv (which gets
- # blessed into B::SV explicitly) and any stray erroneous SVs.
- return 0 unless $$sv;
- confess sprintf("cannot save that type of SV: %s (0x%x)\n",
- class($sv), $$sv);
-}
-
-sub output_all {
- my $init_name = shift;
- my $section;
- my @sections = ($opsect, $unopsect, $binopsect, $logopsect, $condopsect,
- $listopsect, $pmopsect, $svopsect, $gvopsect, $pvopsect,
- $cvopsect, $loopsect, $copsect, $svsect, $xpvsect,
- $xpvavsect, $xpvhvsect, $xpvcvsect, $xpvivsect, $xpvnvsect,
- $xpvmgsect, $xpvlvsect, $xrvsect, $xpvbmsect, $xpviosect);
- $symsect->output(\*STDOUT, "#define %s\n");
- print "\n";
- output_declarations();
- foreach $section (@sections) {
- my $lines = $section->index + 1;
- if ($lines) {
- my $name = $section->name;
- my $typename = ($name eq "xpvcv") ? "XPVCV_or_similar" : uc($name);
- print "Static $typename ${name}_list[$lines];\n";
- }
- }
- $decl->output(\*STDOUT, "%s\n");
- print "\n";
- foreach $section (@sections) {
- my $lines = $section->index + 1;
- if ($lines) {
- my $name = $section->name;
- my $typename = ($name eq "xpvcv") ? "XPVCV_or_similar" : uc($name);
- printf "static %s %s_list[%u] = {\n", $typename, $name, $lines;
- $section->output(\*STDOUT, "\t{ %s },\n");
- print "};\n\n";
- }
- }
-
- print <<"EOT";
-static int $init_name()
-{
- dTHR;
-EOT
- $init->output(\*STDOUT, "\t%s\n");
- print "\treturn 0;\n}\n";
- if ($verbose) {
- warn compile_stats();
- warn "NULLOP count: $nullop_count\n";
- }
-}
-
-sub output_declarations {
- print <<'EOT';
-#ifdef BROKEN_STATIC_REDECL
-#define Static extern
-#else
-#define Static static
-#endif /* BROKEN_STATIC_REDECL */
-
-#ifdef BROKEN_UNION_INIT
-/*
- * Cribbed from cv.h with ANY (a union) replaced by void*.
- * Some pre-Standard compilers can't cope with initialising unions. Ho hum.
- */
-typedef struct {
- char * xpv_pv; /* pointer to malloced string */
- STRLEN xpv_cur; /* length of xp_pv as a C string */
- STRLEN xpv_len; /* allocated size */
- IV xof_off; /* integer value */
- double xnv_nv; /* numeric value, if any */
- MAGIC* xmg_magic; /* magic for scalar array */
- HV* xmg_stash; /* class package */
-
- HV * xcv_stash;
- OP * xcv_start;
- OP * xcv_root;
- void (*xcv_xsub) _((CV*));
- void * xcv_xsubany;
- GV * xcv_gv;
- GV * xcv_filegv;
- long xcv_depth; /* >= 2 indicates recursive call */
- AV * xcv_padlist;
- CV * xcv_outside;
-#ifdef USE_THREADS
- perl_mutex *xcv_mutexp;
- struct perl_thread *xcv_owner; /* current owner thread */
-#endif /* USE_THREADS */
- U8 xcv_flags;
-} XPVCV_or_similar;
-#define ANYINIT(i) i
-#else
-#define XPVCV_or_similar XPVCV
-#define ANYINIT(i) {i}
-#endif /* BROKEN_UNION_INIT */
-#define Nullany ANYINIT(0)
-
-#define UNUSED 0
-#define sym_0 0
-
-EOT
- print "static GV *gv_list[$gv_index];\n" if $gv_index;
- print "\n";
-}
-
-
-sub output_boilerplate {
- print <<'EOT';
-#include "EXTERN.h"
-#include "perl.h"
-#ifndef PATCHLEVEL
-#include "patchlevel.h"
-#endif
-
-/* Workaround for mapstart: the only op which needs a different ppaddr */
-#undef pp_mapstart
-#define pp_mapstart pp_grepstart
-
-static void xs_init _((void));
-static PerlInterpreter *my_perl;
-EOT
-}
-
-sub output_main {
- print <<'EOT';
-int
-#ifndef CAN_PROTOTYPE
-main(argc, argv, env)
-int argc;
-char **argv;
-char **env;
-#else /* def(CAN_PROTOTYPE) */
-main(int argc, char **argv, char **env)
-#endif /* def(CAN_PROTOTYPE) */
-{
- int exitstatus;
- int i;
- char **fakeargv;
-
- PERL_SYS_INIT(&argc,&argv);
-
- perl_init_i18nl10n(1);
-
- if (!do_undump) {
- my_perl = perl_alloc();
- if (!my_perl)
- exit(1);
- perl_construct( my_perl );
- }
-
-#ifdef CSH
- if (!cshlen)
- cshlen = strlen(cshname);
-#endif
-
-#ifdef ALLOW_PERL_OPTIONS
-#define EXTRA_OPTIONS 2
-#else
-#define EXTRA_OPTIONS 3
-#endif /* ALLOW_PERL_OPTIONS */
- New(666, fakeargv, argc + EXTRA_OPTIONS + 1, char *);
- fakeargv[0] = argv[0];
- fakeargv[1] = "-e";
- fakeargv[2] = "";
-#ifndef ALLOW_PERL_OPTIONS
- fakeargv[3] = "--";
-#endif /* ALLOW_PERL_OPTIONS */
- for (i = 1; i < argc; i++)
- fakeargv[i + EXTRA_OPTIONS] = argv[i];
- fakeargv[argc + EXTRA_OPTIONS] = 0;
-
- exitstatus = perl_parse(my_perl, xs_init, argc + EXTRA_OPTIONS,
- fakeargv, NULL);
- if (exitstatus)
- exit( exitstatus );
-
- sv_setpv(GvSV(gv_fetchpv("0", TRUE, SVt_PV)), argv[0]);
- main_cv = compcv;
- compcv = 0;
-
- exitstatus = perl_init();
- if (exitstatus)
- exit( exitstatus );
-
- exitstatus = perl_run( my_perl );
-
- perl_destruct( my_perl );
- perl_free( my_perl );
-
- exit( exitstatus );
-}
-
-static void
-xs_init()
-{
-}
-EOT
-}
-
-sub dump_symtable {
- # For debugging
- my ($sym, $val);
- warn "----Symbol table:\n";
- while (($sym, $val) = each %symtable) {
- warn "$sym => $val\n";
- }
- warn "---End of symbol table\n";
-}
-
-sub save_object {
- my $sv;
- foreach $sv (@_) {
- svref_2object($sv)->save;
- }
-}
-
-sub B::GV::savecv {
- my $gv = shift;
- my $cv = $gv->CV;
- my $name = $gv->NAME;
- if ($$cv && !objsym($cv) && !($name eq "bootstrap" && $cv->XSUB)) {
- if ($debug_cv) {
- warn sprintf("saving extra CV &%s::%s (0x%x) from GV 0x%x\n",
- $gv->STASH->NAME, $name, $$cv, $$gv);
- }
- $gv->save;
- }
-}
-
-sub save_unused_subs {
- my %search_pack;
- map { $search_pack{$_} = 1 } @_;
- no strict qw(vars refs);
- walksymtable(\%{"main::"}, "savecv", sub {
- my $package = shift;
- $package =~ s/::$//;
- #warn "Considering $package\n";#debug
- return 1 if exists $search_pack{$package};
- #warn " (nothing explicit)\n";#debug
- # Omit the packages which we use (and which cause grief
- # because of fancy "goto &$AUTOLOAD" stuff).
- # XXX Surely there must be a nicer way to do this.
- if ($package eq "FileHandle"
- || $package eq "Config"
- || $package eq "SelectSaver") {
- return 0;
- }
- my $m;
- foreach $m (qw(new DESTROY TIESCALAR TIEARRAY TIEHASH)) {
- if (defined(&{$package."::$m"})) {
- warn "$package has method $m: -u$package assumed\n";#debug
- return 1;
- }
- }
- return 0;
- });
-}
-
-sub save_main {
- my $curpad_sym = (comppadlist->ARRAY)[1]->save;
- walkoptree(main_root, "save");
- warn "done main optree, walking symtable for extras\n" if $debug_cv;
- save_unused_subs(@unused_sub_packages);
-
- $init->add(sprintf("main_root = s\\_%x;", ${main_root()}),
- sprintf("main_start = s\\_%x;", ${main_start()}),
- "curpad = AvARRAY($curpad_sym);");
- output_boilerplate();
- print "\n";
- output_all("perl_init");
- print "\n";
- output_main();
-}
-
-sub init_sections {
- my @sections = (init => \$init, decl => \$decl, sym => \$symsect,
- binop => \$binopsect, condop => \$condopsect,
- cop => \$copsect, cvop => \$cvopsect, gvop => \$gvopsect,
- listop => \$listopsect, logop => \$logopsect,
- loop => \$loopsect, op => \$opsect, pmop => \$pmopsect,
- pvop => \$pvopsect, svop => \$svopsect, unop => \$unopsect,
- sv => \$svsect, xpv => \$xpvsect, xpvav => \$xpvavsect,
- xpvhv => \$xpvhvsect, xpvcv => \$xpvcvsect,
- xpviv => \$xpvivsect, xpvnv => \$xpvnvsect,
- xpvmg => \$xpvmgsect, xpvlv => \$xpvlvsect,
- xrv => \$xrvsect, xpvbm => \$xpvbmsect,
- xpvio => \$xpviosect);
- my ($name, $sectref);
- while (($name, $sectref) = splice(@sections, 0, 2)) {
- $$sectref = new B::Section $name, \%symtable, 0;
- }
-}
-
-sub compile {
- my @options = @_;
- my ($option, $opt, $arg);
- OPTION:
- while ($option = shift @options) {
- if ($option =~ /^-(.)(.*)/) {
- $opt = $1;
- $arg = $2;
- } else {
- unshift @options, $option;
- last OPTION;
- }
- if ($opt eq "-" && $arg eq "-") {
- shift @options;
- last OPTION;
- }
- if ($opt eq "w") {
- $warn_undefined_syms = 1;
- } elsif ($opt eq "D") {
- $arg ||= shift @options;
- foreach $arg (split(//, $arg)) {
- if ($arg eq "o") {
- B->debug(1);
- } elsif ($arg eq "c") {
- $debug_cops = 1;
- } elsif ($arg eq "A") {
- $debug_av = 1;
- } elsif ($arg eq "C") {
- $debug_cv = 1;
- } elsif ($arg eq "M") {
- $debug_mg = 1;
- } else {
- warn "ignoring unknown debug option: $arg\n";
- }
- }
- } elsif ($opt eq "o") {
- $arg ||= shift @options;
- open(STDOUT, ">$arg") or return "$arg: $!\n";
- } elsif ($opt eq "v") {
- $verbose = 1;
- } elsif ($opt eq "u") {
- $arg ||= shift @options;
- push(@unused_sub_packages, $arg);
- } elsif ($opt eq "f") {
- $arg ||= shift @options;
- if ($arg eq "cog") {
- $pv_copy_on_grow = 1;
- } elsif ($arg eq "no-cog") {
- $pv_copy_on_grow = 0;
- }
- } elsif ($opt eq "O") {
- $arg = 1 if $arg eq "";
- $pv_copy_on_grow = 0;
- if ($arg >= 1) {
- # Optimisations for -O1
- $pv_copy_on_grow = 1;
- }
- }
- }
- init_sections();
- if (@options) {
- return sub {
- my $objname;
- foreach $objname (@options) {
- eval "save_object(\\$objname)";
- }
- output_all();
- }
- } else {
- return sub { save_main() };
- }
-}
-
-1;
+++ /dev/null
-# CC.pm
-#
-# Copyright (c) 1996, 1997 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-#
-package B::CC;
-use strict;
-use B qw(main_start main_root class comppadlist peekop svref_2object
- timing_info);
-use B::C qw(save_unused_subs objsym init_sections
- output_all output_boilerplate output_main);
-use B::Bblock qw(find_leaders);
-use B::Stackobj qw(:types :flags);
-
-# These should probably be elsewhere
-# Flags for $op->flags
-sub OPf_LIST () { 1 }
-sub OPf_KNOW () { 2 }
-sub OPf_MOD () { 32 }
-sub OPf_STACKED () { 64 }
-sub OPf_SPECIAL () { 128 }
-# op-specific flags for $op->private
-sub OPpASSIGN_BACKWARDS () { 64 }
-sub OPpLVAL_INTRO () { 128 }
-sub OPpDEREF_AV () { 32 }
-sub OPpDEREF_HV () { 64 }
-sub OPpDEREF () { OPpDEREF_AV|OPpDEREF_HV }
-sub OPpFLIP_LINENUM () { 64 }
-sub G_ARRAY () { 1 }
-# cop.h
-sub CXt_NULL () { 0 }
-sub CXt_SUB () { 1 }
-sub CXt_EVAL () { 2 }
-sub CXt_LOOP () { 3 }
-sub CXt_SUBST () { 4 }
-sub CXt_BLOCK () { 5 }
-
-my $module; # module name (when compiled with -m)
-my %done; # hash keyed by $$op of leaders of basic blocks
- # which have already been done.
-my $leaders; # ref to hash of basic block leaders. Keys are $$op
- # addresses, values are the $op objects themselves.
-my @bblock_todo; # list of leaders of basic blocks that need visiting
- # sometime.
-my @cc_todo; # list of tuples defining what PP code needs to be
- # saved (e.g. CV, main or PMOP repl code). Each tuple
- # is [$name, $root, $start, @padlist]. PMOP repl code
- # tuples inherit padlist.
-my @stack; # shadows perl's stack when contents are known.
- # Values are objects derived from class B::Stackobj
-my @pad; # Lexicals in current pad as Stackobj-derived objects
-my @padlist; # Copy of current padlist so PMOP repl code can find it
-my @cxstack; # Shadows the (compile-time) cxstack for next,last,redo
-my $jmpbuf_ix = 0; # Next free index for dynamically allocated jmpbufs
-my %constobj; # OP_CONST constants as Stackobj-derived objects
- # keyed by $$sv.
-my $need_freetmps = 0; # We may postpone FREETMPS to the end of each basic
- # block or even to the end of each loop of blocks,
- # depending on optimisation options.
-my $know_op = 0; # Set when C variable op already holds the right op
- # (from an immediately preceding DOOP(ppname)).
-my $errors = 0; # Number of errors encountered
-my %skip_stack; # Hash of PP names which don't need write_back_stack
-my %skip_lexicals; # Hash of PP names which don't need write_back_lexicals
-my %skip_invalidate; # Hash of PP names which don't need invalidate_lexicals
-my %ignore_op; # Hash of ops which do nothing except returning op_next
-
-BEGIN {
- foreach (qw(pp_scalar pp_regcmaybe pp_lineseq pp_scope pp_null)) {
- $ignore_op{$_} = 1;
- }
-}
-
-my @unused_sub_packages; # list of packages (given by -u options) to search
- # explicitly and save every sub we find there, even
- # if apparently unused (could be only referenced from
- # an eval "" or from a $SIG{FOO} = "bar").
-
-my ($module_name);
-my ($debug_op, $debug_stack, $debug_cxstack, $debug_pad, $debug_runtime,
- $debug_shadow, $debug_queue, $debug_lineno, $debug_timings);
-
-# Optimisation options. On the command line, use hyphens instead of
-# underscores for compatibility with gcc-style options. We use
-# underscores here because they are OK in (strict) barewords.
-my ($freetmps_each_bblock, $freetmps_each_loop, $omit_taint);
-my %optimise = (freetmps_each_bblock => \$freetmps_each_bblock,
- freetmps_each_loop => \$freetmps_each_loop,
- omit_taint => \$omit_taint);
-# perl patchlevel to generate code for (defaults to current patchlevel)
-my $patchlevel = int(0.5 + 1000 * ($] - 5));
-
-# Could rewrite push_runtime() and output_runtime() to use a
-# temporary file if memory is at a premium.
-my $ppname; # name of current fake PP function
-my $runtime_list_ref;
-my $declare_ref; # Hash ref keyed by C variable type of declarations.
-
-my @pp_list; # list of [$ppname, $runtime_list_ref, $declare_ref]
- # tuples to be written out.
-
-my ($init, $decl);
-
-sub init_hash { map { $_ => 1 } @_ }
-
-#
-# Initialise the hashes for the default PP functions where we can avoid
-# either write_back_stack, write_back_lexicals or invalidate_lexicals.
-#
-%skip_lexicals = init_hash qw(pp_enter pp_enterloop);
-%skip_invalidate = init_hash qw(pp_enter pp_enterloop);
-
-sub debug {
- if ($debug_runtime) {
- warn(@_);
- } else {
- runtime(map { chomp; "/* $_ */"} @_);
- }
-}
-
-sub declare {
- my ($type, $var) = @_;
- push(@{$declare_ref->{$type}}, $var);
-}
-
-sub push_runtime {
- push(@$runtime_list_ref, @_);
- warn join("\n", @_) . "\n" if $debug_runtime;
-}
-
-sub save_runtime {
- push(@pp_list, [$ppname, $runtime_list_ref, $declare_ref]);
-}
-
-sub output_runtime {
- my $ppdata;
- print qq(#include "cc_runtime.h"\n);
- foreach $ppdata (@pp_list) {
- my ($name, $runtime, $declare) = @$ppdata;
- print "\nstatic\nPP($name)\n{\n";
- my ($type, $varlist, $line);
- while (($type, $varlist) = each %$declare) {
- print "\t$type ", join(", ", @$varlist), ";\n";
- }
- foreach $line (@$runtime) {
- print $line, "\n";
- }
- print "}\n";
- }
-}
-
-sub runtime {
- my $line;
- foreach $line (@_) {
- push_runtime("\t$line");
- }
-}
-
-sub init_pp {
- $ppname = shift;
- $runtime_list_ref = [];
- $declare_ref = {};
- runtime("djSP;");
- declare("I32", "oldsave");
- declare("SV", "**svp");
- map { declare("SV", "*$_") } qw(sv src dst left right);
- declare("MAGIC", "*mg");
- $decl->add("static OP * $ppname _((ARGSproto));");
- debug "init_pp: $ppname\n" if $debug_queue;
-}
-
-# Initialise runtime_callback function for Stackobj class
-BEGIN { B::Stackobj::set_callback(\&runtime) }
-
-# Initialise saveoptree_callback for B::C class
-sub cc_queue {
- my ($name, $root, $start, @pl) = @_;
- debug "cc_queue: name $name, root $root, start $start, padlist (@pl)\n"
- if $debug_queue;
- if ($name eq "*ignore*") {
- $name = 0;
- } else {
- push(@cc_todo, [$name, $root, $start, (@pl ? @pl : @padlist)]);
- }
- my $fakeop = new B::FAKEOP ("next" => 0, sibling => 0, ppaddr => $name);
- $start = $fakeop->save;
- debug "cc_queue: name $name returns $start\n" if $debug_queue;
- return $start;
-}
-BEGIN { B::C::set_callback(\&cc_queue) }
-
-sub valid_int { $_[0]->{flags} & VALID_INT }
-sub valid_double { $_[0]->{flags} & VALID_DOUBLE }
-sub valid_numeric { $_[0]->{flags} & (VALID_INT | VALID_DOUBLE) }
-sub valid_sv { $_[0]->{flags} & VALID_SV }
-
-sub top_int { @stack ? $stack[-1]->as_int : "TOPi" }
-sub top_double { @stack ? $stack[-1]->as_double : "TOPn" }
-sub top_numeric { @stack ? $stack[-1]->as_numeric : "TOPn" }
-sub top_sv { @stack ? $stack[-1]->as_sv : "TOPs" }
-sub top_bool { @stack ? $stack[-1]->as_numeric : "SvTRUE(TOPs)" }
-
-sub pop_int { @stack ? (pop @stack)->as_int : "POPi" }
-sub pop_double { @stack ? (pop @stack)->as_double : "POPn" }
-sub pop_numeric { @stack ? (pop @stack)->as_numeric : "POPn" }
-sub pop_sv { @stack ? (pop @stack)->as_sv : "POPs" }
-sub pop_bool {
- if (@stack) {
- return ((pop @stack)->as_numeric);
- } else {
- # Careful: POPs has an auto-decrement and SvTRUE evaluates
- # its argument more than once.
- runtime("sv = POPs;");
- return "SvTRUE(sv)";
- }
-}
-
-sub write_back_lexicals {
- my $avoid = shift || 0;
- debug "write_back_lexicals($avoid) called from @{[(caller(1))[3]]}\n"
- if $debug_shadow;
- my $lex;
- foreach $lex (@pad) {
- next unless ref($lex);
- $lex->write_back unless $lex->{flags} & $avoid;
- }
-}
-
-sub write_back_stack {
- my $obj;
- return unless @stack;
- runtime(sprintf("EXTEND(sp, %d);", scalar(@stack)));
- foreach $obj (@stack) {
- runtime(sprintf("PUSHs((SV*)%s);", $obj->as_sv));
- }
- @stack = ();
-}
-
-sub invalidate_lexicals {
- my $avoid = shift || 0;
- debug "invalidate_lexicals($avoid) called from @{[(caller(1))[3]]}\n"
- if $debug_shadow;
- my $lex;
- foreach $lex (@pad) {
- next unless ref($lex);
- $lex->invalidate unless $lex->{flags} & $avoid;
- }
-}
-
-sub reload_lexicals {
- my $lex;
- foreach $lex (@pad) {
- next unless ref($lex);
- my $type = $lex->{type};
- if ($type == T_INT) {
- $lex->as_int;
- } elsif ($type == T_DOUBLE) {
- $lex->as_double;
- } else {
- $lex->as_sv;
- }
- }
-}
-
-{
- package B::Pseudoreg;
- #
- # This class allocates pseudo-registers (OK, so they're C variables).
- #
- my %alloc; # Keyed by variable name. A value of 1 means the
- # variable has been declared. A value of 2 means
- # it's in use.
-
- sub new_scope { %alloc = () }
-
- sub new ($$$) {
- my ($class, $type, $prefix) = @_;
- my ($ptr, $i, $varname, $status, $obj);
- $prefix =~ s/^(\**)//;
- $ptr = $1;
- $i = 0;
- do {
- $varname = "$prefix$i";
- $status = $alloc{$varname};
- } while $status == 2;
- if ($status != 1) {
- # Not declared yet
- B::CC::declare($type, "$ptr$varname");
- $alloc{$varname} = 2; # declared and in use
- }
- $obj = bless \$varname, $class;
- return $obj;
- }
- sub DESTROY {
- my $obj = shift;
- $alloc{$$obj} = 1; # no longer in use but still declared
- }
-}
-{
- package B::Shadow;
- #
- # This class gives a standard API for a perl object to shadow a
- # C variable and only generate reloads/write-backs when necessary.
- #
- # Use $obj->load($foo) instead of runtime("shadowed_c_var = foo").
- # Use $obj->write_back whenever shadowed_c_var needs to be up to date.
- # Use $obj->invalidate whenever an unknown function may have
- # set shadow itself.
-
- sub new {
- my ($class, $write_back) = @_;
- # Object fields are perl shadow variable, validity flag
- # (for *C* variable) and callback sub for write_back
- # (passed perl shadow variable as argument).
- bless [undef, 1, $write_back], $class;
- }
- sub load {
- my ($obj, $newval) = @_;
- $obj->[1] = 0; # C variable no longer valid
- $obj->[0] = $newval;
- }
- sub write_back {
- my $obj = shift;
- if (!($obj->[1])) {
- $obj->[1] = 1; # C variable will now be valid
- &{$obj->[2]}($obj->[0]);
- }
- }
- sub invalidate { $_[0]->[1] = 0 } # force C variable to be invalid
-}
-my $curcop = new B::Shadow (sub {
- my $opsym = shift->save;
- runtime("curcop = (COP*)$opsym;");
-});
-
-#
-# Context stack shadowing. Mimics stuff in pp_ctl.c, cop.h and so on.
-#
-sub dopoptoloop {
- my $cxix = $#cxstack;
- while ($cxix >= 0 && $cxstack[$cxix]->{type} != CXt_LOOP) {
- $cxix--;
- }
- debug "dopoptoloop: returning $cxix" if $debug_cxstack;
- return $cxix;
-}
-
-sub dopoptolabel {
- my $label = shift;
- my $cxix = $#cxstack;
- while ($cxix >= 0 && $cxstack[$cxix]->{type} != CXt_LOOP
- && $cxstack[$cxix]->{label} ne $label) {
- $cxix--;
- }
- debug "dopoptolabel: returning $cxix" if $debug_cxstack;
- return $cxix;
-}
-
-sub error {
- my $format = shift;
- my $file = $curcop->[0]->filegv->SV->PV;
- my $line = $curcop->[0]->line;
- $errors++;
- if (@_) {
- warn sprintf("%s:%d: $format\n", $file, $line, @_);
- } else {
- warn sprintf("%s:%d: %s\n", $file, $line, $format);
- }
-}
-
-#
-# Load pad takes (the elements of) a PADLIST as arguments and loads
-# up @pad with Stackobj-derived objects which represent those lexicals.
-# If/when perl itself can generate type information (my int $foo) then
-# we'll take advantage of that here. Until then, we'll use various hacks
-# to tell the compiler when we want a lexical to be a particular type
-# or to be a register.
-#
-sub load_pad {
- my ($namelistav, $valuelistav) = @_;
- @padlist = @_;
- my @namelist = $namelistav->ARRAY;
- my @valuelist = $valuelistav->ARRAY;
- my $ix;
- @pad = ();
- debug "load_pad: $#namelist names, $#valuelist values\n" if $debug_pad;
- # Temporary lexicals don't get named so it's possible for @valuelist
- # to be strictly longer than @namelist. We count $ix up to the end of
- # @valuelist but index into @namelist for the name. Any temporaries which
- # run off the end of @namelist will make $namesv undefined and we treat
- # that the same as having an explicit SPECIAL sv_undef object in @namelist.
- # [XXX If/when @_ becomes a lexical, we must start at 0 here.]
- for ($ix = 1; $ix < @valuelist; $ix++) {
- my $namesv = $namelist[$ix];
- my $type = T_UNKNOWN;
- my $flags = 0;
- my $name = "tmp$ix";
- my $class = class($namesv);
- if (!defined($namesv) || $class eq "SPECIAL") {
- # temporaries have &sv_undef instead of a PVNV for a name
- $flags = VALID_SV|TEMPORARY|REGISTER;
- } else {
- if ($namesv->PV =~ /^\$(.*)_([di])(r?)$/) {
- $name = $1;
- if ($2 eq "i") {
- $type = T_INT;
- $flags = VALID_SV|VALID_INT;
- } elsif ($2 eq "d") {
- $type = T_DOUBLE;
- $flags = VALID_SV|VALID_DOUBLE;
- }
- $flags |= REGISTER if $3;
- }
- }
- $pad[$ix] = new B::Stackobj::Padsv ($type, $flags, $ix,
- "i_$name", "d_$name");
- declare("IV", $type == T_INT ? "i_$name = 0" : "i_$name");
- declare("double", $type == T_DOUBLE ? "d_$name = 0" : "d_$name");
- debug sprintf("curpad[$ix] = %s\n", $pad[$ix]->peek) if $debug_pad;
- }
-}
-
-#
-# Debugging stuff
-#
-sub peek_stack { sprintf "stack = %s\n", join(" ", map($_->minipeek, @stack)) }
-
-#
-# OP stuff
-#
-
-sub label {
- my $op = shift;
- # XXX Preserve original label name for "real" labels?
- return sprintf("lab_%x", $$op);
-}
-
-sub write_label {
- my $op = shift;
- push_runtime(sprintf(" %s:", label($op)));
-}
-
-sub loadop {
- my $op = shift;
- my $opsym = $op->save;
- runtime("op = $opsym;") unless $know_op;
- return $opsym;
-}
-
-sub doop {
- my $op = shift;
- my $ppname = $op->ppaddr;
- my $sym = loadop($op);
- runtime("DOOP($ppname);");
- $know_op = 1;
- return $sym;
-}
-
-sub gimme {
- my $op = shift;
- my $flags = $op->flags;
- return (($flags & OPf_KNOW) ? ($flags & OPf_LIST) : "dowantarray()");
-}
-
-#
-# Code generation for PP code
-#
-
-sub pp_null {
- my $op = shift;
- return $op->next;
-}
-
-sub pp_stub {
- my $op = shift;
- my $gimme = gimme($op);
- if ($gimme != 1) {
- # XXX Change to push a constant sv_undef Stackobj onto @stack
- write_back_stack();
- runtime("if ($gimme != G_ARRAY) XPUSHs(&sv_undef);");
- }
- return $op->next;
-}
-
-sub pp_unstack {
- my $op = shift;
- @stack = ();
- runtime("PP_UNSTACK;");
- return $op->next;
-}
-
-sub pp_and {
- my $op = shift;
- my $next = $op->next;
- reload_lexicals();
- unshift(@bblock_todo, $next);
- if (@stack >= 1) {
- my $bool = pop_bool();
- write_back_stack();
- runtime(sprintf("if (!$bool) goto %s;", label($next)));
- } else {
- runtime(sprintf("if (!%s) goto %s;", top_bool(), label($next)),
- "*sp--;");
- }
- return $op->other;
-}
-
-sub pp_or {
- my $op = shift;
- my $next = $op->next;
- reload_lexicals();
- unshift(@bblock_todo, $next);
- if (@stack >= 1) {
- my $obj = pop @stack;
- write_back_stack();
- runtime(sprintf("if (%s) { XPUSHs(%s); goto %s; }",
- $obj->as_numeric, $obj->as_sv, label($next)));
- } else {
- runtime(sprintf("if (%s) goto %s;", top_bool(), label($next)),
- "*sp--;");
- }
- return $op->other;
-}
-
-sub pp_cond_expr {
- my $op = shift;
- my $false = $op->false;
- unshift(@bblock_todo, $false);
- reload_lexicals();
- my $bool = pop_bool();
- write_back_stack();
- runtime(sprintf("if (!$bool) goto %s;", label($false)));
- return $op->true;
-}
-
-sub pp_padsv {
- my $op = shift;
- my $ix = $op->targ;
- push(@stack, $pad[$ix]);
- if ($op->flags & OPf_MOD) {
- my $private = $op->private;
- if ($private & OPpLVAL_INTRO) {
- runtime("SAVECLEARSV(curpad[$ix]);");
- } elsif ($private & OPpDEREF) {
- runtime(sprintf("vivify_ref(curpad[%d], %d);",
- $ix, $private & OPpDEREF));
- $pad[$ix]->invalidate;
- }
- }
- return $op->next;
-}
-
-sub pp_const {
- my $op = shift;
- my $sv = $op->sv;
- my $obj = $constobj{$$sv};
- if (!defined($obj)) {
- $obj = $constobj{$$sv} = new B::Stackobj::Const ($sv);
- }
- push(@stack, $obj);
- return $op->next;
-}
-
-sub pp_nextstate {
- my $op = shift;
- $curcop->load($op);
- @stack = ();
- debug(sprintf("%s:%d\n", $op->filegv->SV->PV, $op->line)) if $debug_lineno;
- runtime("TAINT_NOT;") unless $omit_taint;
- runtime("sp = stack_base + cxstack[cxstack_ix].blk_oldsp;");
- if ($freetmps_each_bblock || $freetmps_each_loop) {
- $need_freetmps = 1;
- } else {
- runtime("FREETMPS;");
- }
- return $op->next;
-}
-
-sub pp_dbstate {
- my $op = shift;
- $curcop->invalidate; # XXX?
- return default_pp($op);
-}
-
-sub pp_rv2gv { $curcop->write_back; default_pp(@_) }
-sub pp_bless { $curcop->write_back; default_pp(@_) }
-sub pp_repeat { $curcop->write_back; default_pp(@_) }
-# The following subs need $curcop->write_back if we decide to support arybase:
-# pp_pos, pp_substr, pp_index, pp_rindex, pp_aslice, pp_lslice, pp_splice
-sub pp_sort { $curcop->write_back; default_pp(@_) }
-sub pp_caller { $curcop->write_back; default_pp(@_) }
-sub pp_reset { $curcop->write_back; default_pp(@_) }
-
-sub pp_gv {
- my $op = shift;
- my $gvsym = $op->gv->save;
- write_back_stack();
- runtime("XPUSHs((SV*)$gvsym);");
- return $op->next;
-}
-
-sub pp_gvsv {
- my $op = shift;
- my $gvsym = $op->gv->save;
- write_back_stack();
- if ($op->private & OPpLVAL_INTRO) {
- runtime("XPUSHs(save_scalar($gvsym));");
- } else {
- runtime("XPUSHs(GvSV($gvsym));");
- }
- return $op->next;
-}
-
-sub pp_aelemfast {
- my $op = shift;
- my $gvsym = $op->gv->save;
- my $ix = $op->private;
- my $flag = $op->flags & OPf_MOD;
- write_back_stack();
- runtime("svp = av_fetch(GvAV($gvsym), $ix, $flag);",
- "PUSHs(svp ? *svp : &sv_undef);");
- return $op->next;
-}
-
-sub int_binop {
- my ($op, $operator) = @_;
- if ($op->flags & OPf_STACKED) {
- my $right = pop_int();
- if (@stack >= 1) {
- my $left = top_int();
- $stack[-1]->set_int(&$operator($left, $right));
- } else {
- runtime(sprintf("sv_setiv(TOPs, %s);",&$operator("TOPi", $right)));
- }
- } else {
- my $targ = $pad[$op->targ];
- my $right = new B::Pseudoreg ("IV", "riv");
- my $left = new B::Pseudoreg ("IV", "liv");
- runtime(sprintf("$$right = %s; $$left = %s;", pop_int(), pop_int));
- $targ->set_int(&$operator($$left, $$right));
- push(@stack, $targ);
- }
- return $op->next;
-}
-
-sub INTS_CLOSED () { 0x1 }
-sub INT_RESULT () { 0x2 }
-sub NUMERIC_RESULT () { 0x4 }
-
-sub numeric_binop {
- my ($op, $operator, $flags) = @_;
- my $force_int = 0;
- $force_int ||= ($flags & INT_RESULT);
- $force_int ||= ($flags & INTS_CLOSED && @stack >= 2
- && valid_int($stack[-2]) && valid_int($stack[-1]));
- if ($op->flags & OPf_STACKED) {
- my $right = pop_numeric();
- if (@stack >= 1) {
- my $left = top_numeric();
- if ($force_int) {
- $stack[-1]->set_int(&$operator($left, $right));
- } else {
- $stack[-1]->set_numeric(&$operator($left, $right));
- }
- } else {
- if ($force_int) {
- runtime(sprintf("sv_setiv(TOPs, %s);",
- &$operator("TOPi", $right)));
- } else {
- runtime(sprintf("sv_setnv(TOPs, %s);",
- &$operator("TOPn", $right)));
- }
- }
- } else {
- my $targ = $pad[$op->targ];
- $force_int ||= ($targ->{type} == T_INT);
- if ($force_int) {
- my $right = new B::Pseudoreg ("IV", "riv");
- my $left = new B::Pseudoreg ("IV", "liv");
- runtime(sprintf("$$right = %s; $$left = %s;",
- pop_numeric(), pop_numeric));
- $targ->set_int(&$operator($$left, $$right));
- } else {
- my $right = new B::Pseudoreg ("double", "rnv");
- my $left = new B::Pseudoreg ("double", "lnv");
- runtime(sprintf("$$right = %s; $$left = %s;",
- pop_numeric(), pop_numeric));
- $targ->set_numeric(&$operator($$left, $$right));
- }
- push(@stack, $targ);
- }
- return $op->next;
-}
-
-sub sv_binop {
- my ($op, $operator, $flags) = @_;
- if ($op->flags & OPf_STACKED) {
- my $right = pop_sv();
- if (@stack >= 1) {
- my $left = top_sv();
- if ($flags & INT_RESULT) {
- $stack[-1]->set_int(&$operator($left, $right));
- } elsif ($flags & NUMERIC_RESULT) {
- $stack[-1]->set_numeric(&$operator($left, $right));
- } else {
- # XXX Does this work?
- runtime(sprintf("sv_setsv($left, %s);",
- &$operator($left, $right)));
- $stack[-1]->invalidate;
- }
- } else {
- my $f;
- if ($flags & INT_RESULT) {
- $f = "sv_setiv";
- } elsif ($flags & NUMERIC_RESULT) {
- $f = "sv_setnv";
- } else {
- $f = "sv_setsv";
- }
- runtime(sprintf("%s(TOPs, %s);", $f, &$operator("TOPs", $right)));
- }
- } else {
- my $targ = $pad[$op->targ];
- runtime(sprintf("right = %s; left = %s;", pop_sv(), pop_sv));
- if ($flags & INT_RESULT) {
- $targ->set_int(&$operator("left", "right"));
- } elsif ($flags & NUMERIC_RESULT) {
- $targ->set_numeric(&$operator("left", "right"));
- } else {
- # XXX Does this work?
- runtime(sprintf("sv_setsv(%s, %s);",
- $targ->as_sv, &$operator("left", "right")));
- $targ->invalidate;
- }
- push(@stack, $targ);
- }
- return $op->next;
-}
-
-sub bool_int_binop {
- my ($op, $operator) = @_;
- my $right = new B::Pseudoreg ("IV", "riv");
- my $left = new B::Pseudoreg ("IV", "liv");
- runtime(sprintf("$$right = %s; $$left = %s;", pop_int(), pop_int()));
- my $bool = new B::Stackobj::Bool (new B::Pseudoreg ("int", "b"));
- $bool->set_int(&$operator($$left, $$right));
- push(@stack, $bool);
- return $op->next;
-}
-
-sub bool_numeric_binop {
- my ($op, $operator) = @_;
- my $right = new B::Pseudoreg ("double", "rnv");
- my $left = new B::Pseudoreg ("double", "lnv");
- runtime(sprintf("$$right = %s; $$left = %s;",
- pop_numeric(), pop_numeric()));
- my $bool = new B::Stackobj::Bool (new B::Pseudoreg ("int", "b"));
- $bool->set_numeric(&$operator($$left, $$right));
- push(@stack, $bool);
- return $op->next;
-}
-
-sub bool_sv_binop {
- my ($op, $operator) = @_;
- runtime(sprintf("right = %s; left = %s;", pop_sv(), pop_sv()));
- my $bool = new B::Stackobj::Bool (new B::Pseudoreg ("int", "b"));
- $bool->set_numeric(&$operator("left", "right"));
- push(@stack, $bool);
- return $op->next;
-}
-
-sub infix_op {
- my $opname = shift;
- return sub { "$_[0] $opname $_[1]" }
-}
-
-sub prefix_op {
- my $opname = shift;
- return sub { sprintf("%s(%s)", $opname, join(", ", @_)) }
-}
-
-BEGIN {
- my $plus_op = infix_op("+");
- my $minus_op = infix_op("-");
- my $multiply_op = infix_op("*");
- my $divide_op = infix_op("/");
- my $modulo_op = infix_op("%");
- my $lshift_op = infix_op("<<");
- my $rshift_op = infix_op("<<");
- my $ncmp_op = sub { "($_[0] > $_[1] ? 1 : ($_[0] < $_[1]) ? -1 : 0)" };
- my $scmp_op = prefix_op("sv_cmp");
- my $seq_op = prefix_op("sv_eq");
- my $sne_op = prefix_op("!sv_eq");
- my $slt_op = sub { "sv_cmp($_[0], $_[1]) < 0" };
- my $sgt_op = sub { "sv_cmp($_[0], $_[1]) > 0" };
- my $sle_op = sub { "sv_cmp($_[0], $_[1]) <= 0" };
- my $sge_op = sub { "sv_cmp($_[0], $_[1]) >= 0" };
- my $eq_op = infix_op("==");
- my $ne_op = infix_op("!=");
- my $lt_op = infix_op("<");
- my $gt_op = infix_op(">");
- my $le_op = infix_op("<=");
- my $ge_op = infix_op(">=");
-
- #
- # XXX The standard perl PP code has extra handling for
- # some special case arguments of these operators.
- #
- sub pp_add { numeric_binop($_[0], $plus_op, INTS_CLOSED) }
- sub pp_subtract { numeric_binop($_[0], $minus_op, INTS_CLOSED) }
- sub pp_multiply { numeric_binop($_[0], $multiply_op, INTS_CLOSED) }
- sub pp_divide { numeric_binop($_[0], $divide_op) }
- sub pp_modulo { int_binop($_[0], $modulo_op) } # differs from perl's
- sub pp_ncmp { numeric_binop($_[0], $ncmp_op, INT_RESULT) }
-
- sub pp_left_shift { int_binop($_[0], $lshift_op) }
- sub pp_right_shift { int_binop($_[0], $rshift_op) }
- sub pp_i_add { int_binop($_[0], $plus_op) }
- sub pp_i_subtract { int_binop($_[0], $minus_op) }
- sub pp_i_multiply { int_binop($_[0], $multiply_op) }
- sub pp_i_divide { int_binop($_[0], $divide_op) }
- sub pp_i_modulo { int_binop($_[0], $modulo_op) }
-
- sub pp_eq { bool_numeric_binop($_[0], $eq_op) }
- sub pp_ne { bool_numeric_binop($_[0], $ne_op) }
- sub pp_lt { bool_numeric_binop($_[0], $lt_op) }
- sub pp_gt { bool_numeric_binop($_[0], $gt_op) }
- sub pp_le { bool_numeric_binop($_[0], $le_op) }
- sub pp_ge { bool_numeric_binop($_[0], $ge_op) }
-
- sub pp_i_eq { bool_int_binop($_[0], $eq_op) }
- sub pp_i_ne { bool_int_binop($_[0], $ne_op) }
- sub pp_i_lt { bool_int_binop($_[0], $lt_op) }
- sub pp_i_gt { bool_int_binop($_[0], $gt_op) }
- sub pp_i_le { bool_int_binop($_[0], $le_op) }
- sub pp_i_ge { bool_int_binop($_[0], $ge_op) }
-
- sub pp_scmp { sv_binop($_[0], $scmp_op, INT_RESULT) }
- sub pp_slt { bool_sv_binop($_[0], $slt_op) }
- sub pp_sgt { bool_sv_binop($_[0], $sgt_op) }
- sub pp_sle { bool_sv_binop($_[0], $sle_op) }
- sub pp_sge { bool_sv_binop($_[0], $sge_op) }
- sub pp_seq { bool_sv_binop($_[0], $seq_op) }
- sub pp_sne { bool_sv_binop($_[0], $sne_op) }
-}
-
-
-sub pp_sassign {
- my $op = shift;
- my $backwards = $op->private & OPpASSIGN_BACKWARDS;
- my ($dst, $src);
- if (@stack >= 2) {
- $dst = pop @stack;
- $src = pop @stack;
- ($src, $dst) = ($dst, $src) if $backwards;
- my $type = $src->{type};
- if ($type == T_INT) {
- $dst->set_int($src->as_int);
- } elsif ($type == T_DOUBLE) {
- $dst->set_numeric($src->as_numeric);
- } else {
- $dst->set_sv($src->as_sv);
- }
- push(@stack, $dst);
- } elsif (@stack == 1) {
- if ($backwards) {
- my $src = pop @stack;
- my $type = $src->{type};
- runtime("if (tainting && tainted) TAINT_NOT;");
- if ($type == T_INT) {
- runtime sprintf("sv_setiv(TOPs, %s);", $src->as_int);
- } elsif ($type == T_DOUBLE) {
- runtime sprintf("sv_setnv(TOPs, %s);", $src->as_double);
- } else {
- runtime sprintf("sv_setsv(TOPs, %s);", $src->as_sv);
- }
- runtime("SvSETMAGIC(TOPs);");
- } else {
- my $dst = pop @stack;
- my $type = $dst->{type};
- runtime("sv = POPs;");
- runtime("MAYBE_TAINT_SASSIGN_SRC(sv);");
- if ($type == T_INT) {
- $dst->set_int("SvIV(sv)");
- } elsif ($type == T_DOUBLE) {
- $dst->set_double("SvNV(sv)");
- } else {
- runtime("SvSetSV($dst->{sv}, sv);");
- $dst->invalidate;
- }
- }
- } else {
- if ($backwards) {
- runtime("src = POPs; dst = TOPs;");
- } else {
- runtime("dst = POPs; src = TOPs;");
- }
- runtime("MAYBE_TAINT_SASSIGN_SRC(src);",
- "SvSetSV(dst, src);",
- "SvSETMAGIC(dst);",
- "SETs(dst);");
- }
- return $op->next;
-}
-
-sub pp_preinc {
- my $op = shift;
- if (@stack >= 1) {
- my $obj = $stack[-1];
- my $type = $obj->{type};
- if ($type == T_INT || $type == T_DOUBLE) {
- $obj->set_int($obj->as_int . " + 1");
- } else {
- runtime sprintf("PP_PREINC(%s);", $obj->as_sv);
- $obj->invalidate();
- }
- } else {
- runtime sprintf("PP_PREINC(TOPs);");
- }
- return $op->next;
-}
-
-sub pp_pushmark {
- my $op = shift;
- write_back_stack();
- runtime("PUSHMARK(sp);");
- return $op->next;
-}
-
-sub pp_list {
- my $op = shift;
- write_back_stack();
- my $gimme = gimme($op);
- if ($gimme == 1) { # sic
- runtime("POPMARK;"); # need this even though not a "full" pp_list
- } else {
- runtime("PP_LIST($gimme);");
- }
- return $op->next;
-}
-
-sub pp_entersub {
- my $op = shift;
- write_back_lexicals(REGISTER|TEMPORARY);
- write_back_stack();
- my $sym = doop($op);
- runtime("if (op != ($sym)->op_next) op = (*op->op_ppaddr)(ARGS);");
- runtime("SPAGAIN;");
- $know_op = 0;
- invalidate_lexicals(REGISTER|TEMPORARY);
- return $op->next;
-}
-
-sub pp_enterwrite {
- my $op = shift;
- pp_entersub($op);
-}
-
-sub pp_leavewrite {
- my $op = shift;
- write_back_lexicals(REGISTER|TEMPORARY);
- write_back_stack();
- my $sym = doop($op);
- # XXX Is this the right way to distinguish between it returning
- # CvSTART(cv) (via doform) and pop_return()?
- runtime("if (op) op = (*op->op_ppaddr)(ARGS);");
- runtime("SPAGAIN;");
- $know_op = 0;
- invalidate_lexicals(REGISTER|TEMPORARY);
- return $op->next;
-}
-
-sub doeval {
- my $op = shift;
- $curcop->write_back;
- write_back_lexicals(REGISTER|TEMPORARY);
- write_back_stack();
- my $sym = loadop($op);
- my $ppaddr = $op->ppaddr;
- runtime("PP_EVAL($ppaddr, ($sym)->op_next);");
- $know_op = 1;
- invalidate_lexicals(REGISTER|TEMPORARY);
- return $op->next;
-}
-
-sub pp_entereval { doeval(@_) }
-sub pp_require { doeval(@_) }
-sub pp_dofile { doeval(@_) }
-
-sub pp_entertry {
- my $op = shift;
- $curcop->write_back;
- write_back_lexicals(REGISTER|TEMPORARY);
- write_back_stack();
- my $sym = doop($op);
- my $jmpbuf = sprintf("jmpbuf%d", $jmpbuf_ix++);
- declare("Sigjmp_buf", $jmpbuf);
- runtime(sprintf("PP_ENTERTRY(%s,%s);", $jmpbuf, label($op->other->next)));
- invalidate_lexicals(REGISTER|TEMPORARY);
- return $op->next;
-}
-
-sub pp_grepstart {
- my $op = shift;
- if ($need_freetmps && $freetmps_each_loop) {
- runtime("FREETMPS;"); # otherwise the grepwhile loop messes things up
- $need_freetmps = 0;
- }
- write_back_stack();
- doop($op);
- return $op->next->other;
-}
-
-sub pp_mapstart {
- my $op = shift;
- if ($need_freetmps && $freetmps_each_loop) {
- runtime("FREETMPS;"); # otherwise the mapwhile loop messes things up
- $need_freetmps = 0;
- }
- write_back_stack();
- doop($op);
- return $op->next->other;
-}
-
-sub pp_grepwhile {
- my $op = shift;
- my $next = $op->next;
- unshift(@bblock_todo, $next);
- write_back_lexicals();
- write_back_stack();
- my $sym = doop($op);
- # pp_grepwhile can return either op_next or op_other and we need to
- # be able to distinguish the two at runtime. Since it's possible for
- # both ops to be "inlined", the fields could both be zero. To get
- # around that, we hack op_next to be our own op (purely because we
- # know it's a non-NULL pointer and can't be the same as op_other).
- $init->add("((LOGOP*)$sym)->op_next = $sym;");
- runtime(sprintf("if (op == ($sym)->op_next) goto %s;", label($next)));
- $know_op = 0;
- return $op->other;
-}
-
-sub pp_mapwhile {
- pp_grepwhile(@_);
-}
-
-sub pp_return {
- my $op = shift;
- write_back_lexicals(REGISTER|TEMPORARY);
- write_back_stack();
- doop($op);
- runtime("PUTBACK;", "return 0;");
- $know_op = 0;
- return $op->next;
-}
-
-sub nyi {
- my $op = shift;
- warn sprintf("%s not yet implemented properly\n", $op->ppaddr);
- return default_pp($op);
-}
-
-sub pp_range {
- my $op = shift;
- my $flags = $op->flags;
- if (!($flags & OPf_KNOW)) {
- error("context of range unknown at compile-time");
- }
- write_back_lexicals();
- write_back_stack();
- if (!($flags & OPf_LIST)) {
- # We need to save our UNOP structure since pp_flop uses
- # it to find and adjust out targ. We don't need it ourselves.
- $op->save;
- runtime sprintf("if (SvTRUE(curpad[%d])) goto %s;",
- $op->targ, label($op->false));
- unshift(@bblock_todo, $op->false);
- }
- return $op->true;
-}
-
-sub pp_flip {
- my $op = shift;
- my $flags = $op->flags;
- if (!($flags & OPf_KNOW)) {
- error("context of flip unknown at compile-time");
- }
- if ($flags & OPf_LIST) {
- return $op->first->false;
- }
- write_back_lexicals();
- write_back_stack();
- # We need to save our UNOP structure since pp_flop uses
- # it to find and adjust out targ. We don't need it ourselves.
- $op->save;
- my $ix = $op->targ;
- my $rangeix = $op->first->targ;
- runtime(($op->private & OPpFLIP_LINENUM) ?
- "if (last_in_gv && SvIV(TOPs) == IoLINES(GvIOp(last_in_gv))) {"
- : "if (SvTRUE(TOPs)) {");
- runtime("\tsv_setiv(curpad[$rangeix], 1);");
- if ($op->flags & OPf_SPECIAL) {
- runtime("sv_setiv(curpad[$ix], 1);");
- } else {
- runtime("\tsv_setiv(curpad[$ix], 0);",
- "\tsp--;",
- sprintf("\tgoto %s;", label($op->first->false)));
- }
- runtime("}",
- qq{sv_setpv(curpad[$ix], "");},
- "SETs(curpad[$ix]);");
- $know_op = 0;
- return $op->next;
-}
-
-sub pp_flop {
- my $op = shift;
- default_pp($op);
- $know_op = 0;
- return $op->next;
-}
-
-sub enterloop {
- my $op = shift;
- my $nextop = $op->nextop;
- my $lastop = $op->lastop;
- my $redoop = $op->redoop;
- $curcop->write_back;
- debug "enterloop: pushing on cxstack" if $debug_cxstack;
- push(@cxstack, {
- type => CXt_LOOP,
- op => $op,
- "label" => $curcop->[0]->label,
- nextop => $nextop,
- lastop => $lastop,
- redoop => $redoop
- });
- $nextop->save;
- $lastop->save;
- $redoop->save;
- return default_pp($op);
-}
-
-sub pp_enterloop { enterloop(@_) }
-sub pp_enteriter { enterloop(@_) }
-
-sub pp_leaveloop {
- my $op = shift;
- if (!@cxstack) {
- die "panic: leaveloop";
- }
- debug "leaveloop: popping from cxstack" if $debug_cxstack;
- pop(@cxstack);
- return default_pp($op);
-}
-
-sub pp_next {
- my $op = shift;
- my $cxix;
- if ($op->flags & OPf_SPECIAL) {
- $cxix = dopoptoloop();
- if ($cxix < 0) {
- error('"next" used outside loop');
- return $op->next; # ignore the op
- }
- } else {
- $cxix = dopoptolabel($op->pv);
- if ($cxix < 0) {
- error('Label not found at compile time for "next %s"', $op->pv);
- return $op->next; # ignore the op
- }
- }
- default_pp($op);
- my $nextop = $cxstack[$cxix]->{nextop};
- push(@bblock_todo, $nextop);
- runtime(sprintf("goto %s;", label($nextop)));
- return $op->next;
-}
-
-sub pp_redo {
- my $op = shift;
- my $cxix;
- if ($op->flags & OPf_SPECIAL) {
- $cxix = dopoptoloop();
- if ($cxix < 0) {
- error('"redo" used outside loop');
- return $op->next; # ignore the op
- }
- } else {
- $cxix = dopoptolabel($op->pv);
- if ($cxix < 0) {
- error('Label not found at compile time for "redo %s"', $op->pv);
- return $op->next; # ignore the op
- }
- }
- default_pp($op);
- my $redoop = $cxstack[$cxix]->{redoop};
- push(@bblock_todo, $redoop);
- runtime(sprintf("goto %s;", label($redoop)));
- return $op->next;
-}
-
-sub pp_last {
- my $op = shift;
- my $cxix;
- if ($op->flags & OPf_SPECIAL) {
- $cxix = dopoptoloop();
- if ($cxix < 0) {
- error('"last" used outside loop');
- return $op->next; # ignore the op
- }
- } else {
- $cxix = dopoptolabel($op->pv);
- if ($cxix < 0) {
- error('Label not found at compile time for "last %s"', $op->pv);
- return $op->next; # ignore the op
- }
- # XXX Add support for "last" to leave non-loop blocks
- if ($cxstack[$cxix]->{type} != CXt_LOOP) {
- error('Use of "last" for non-loop blocks is not yet implemented');
- return $op->next; # ignore the op
- }
- }
- default_pp($op);
- my $lastop = $cxstack[$cxix]->{lastop}->next;
- push(@bblock_todo, $lastop);
- runtime(sprintf("goto %s;", label($lastop)));
- return $op->next;
-}
-
-sub pp_subst {
- my $op = shift;
- write_back_lexicals();
- write_back_stack();
- my $sym = doop($op);
- my $replroot = $op->pmreplroot;
- if ($$replroot) {
- runtime sprintf("if (op == ((PMOP*)(%s))->op_pmreplroot) goto %s;",
- $sym, label($replroot));
- $op->pmreplstart->save;
- push(@bblock_todo, $replroot);
- }
- invalidate_lexicals();
- return $op->next;
-}
-
-sub pp_substcont {
- my $op = shift;
- write_back_lexicals();
- write_back_stack();
- doop($op);
- my $pmop = $op->other;
- warn sprintf("substcont: op = %s, pmop = %s\n",
- peekop($op), peekop($pmop));#debug
-# my $pmopsym = objsym($pmop);
- my $pmopsym = $pmop->save; # XXX can this recurse?
- warn "pmopsym = $pmopsym\n";#debug
- runtime sprintf("if (op == ((PMOP*)(%s))->op_pmreplstart) goto %s;",
- $pmopsym, label($pmop->pmreplstart));
- invalidate_lexicals();
- return $pmop->next;
-}
-
-sub default_pp {
- my $op = shift;
- my $ppname = $op->ppaddr;
- write_back_lexicals() unless $skip_lexicals{$ppname};
- write_back_stack() unless $skip_stack{$ppname};
- doop($op);
- # XXX If the only way that ops can write to a TEMPORARY lexical is
- # when it's named in $op->targ then we could call
- # invalidate_lexicals(TEMPORARY) and avoid having to write back all
- # the temporaries. For now, we'll play it safe and write back the lot.
- invalidate_lexicals() unless $skip_invalidate{$ppname};
- return $op->next;
-}
-
-sub compile_op {
- my $op = shift;
- my $ppname = $op->ppaddr;
- if (exists $ignore_op{$ppname}) {
- return $op->next;
- }
- debug peek_stack() if $debug_stack;
- if ($debug_op) {
- debug sprintf("%s [%s]\n",
- peekop($op),
- $op->flags & OPf_STACKED ? "OPf_STACKED" : $op->targ);
- }
- no strict 'refs';
- if (defined(&$ppname)) {
- $know_op = 0;
- return &$ppname($op);
- } else {
- return default_pp($op);
- }
-}
-
-sub compile_bblock {
- my $op = shift;
- #warn "compile_bblock: ", peekop($op), "\n"; # debug
- write_label($op);
- $know_op = 0;
- do {
- $op = compile_op($op);
- } while (defined($op) && $$op && !exists($leaders->{$$op}));
- write_back_stack(); # boo hoo: big loss
- reload_lexicals();
- return $op;
-}
-
-sub cc {
- my ($name, $root, $start, @padlist) = @_;
- my $op;
- init_pp($name);
- load_pad(@padlist);
- B::Pseudoreg->new_scope;
- @cxstack = ();
- if ($debug_timings) {
- warn sprintf("Basic block analysis at %s\n", timing_info);
- }
- $leaders = find_leaders($root, $start);
- @bblock_todo = ($start, values %$leaders);
- if ($debug_timings) {
- warn sprintf("Compilation at %s\n", timing_info);
- }
- while (@bblock_todo) {
- $op = shift @bblock_todo;
- #warn sprintf("Considering basic block %s\n", peekop($op)); # debug
- next if !defined($op) || !$$op || $done{$$op};
- #warn "...compiling it\n"; # debug
- do {
- $done{$$op} = 1;
- $op = compile_bblock($op);
- if ($need_freetmps && $freetmps_each_bblock) {
- runtime("FREETMPS;");
- $need_freetmps = 0;
- }
- } while defined($op) && $$op && !$done{$$op};
- if ($need_freetmps && $freetmps_each_loop) {
- runtime("FREETMPS;");
- $need_freetmps = 0;
- }
- if (!$$op) {
- runtime("PUTBACK;", "return 0;");
- } elsif ($done{$$op}) {
- runtime(sprintf("goto %s;", label($op)));
- }
- }
- if ($debug_timings) {
- warn sprintf("Saving runtime at %s\n", timing_info);
- }
- save_runtime();
-}
-
-sub cc_recurse {
- my $ccinfo;
- my $start;
- $start = cc_queue(@_) if @_;
- while ($ccinfo = shift @cc_todo) {
- cc(@$ccinfo);
- }
- return $start;
-}
-
-sub cc_obj {
- my ($name, $cvref) = @_;
- my $cv = svref_2object($cvref);
- my @padlist = $cv->PADLIST->ARRAY;
- my $curpad_sym = $padlist[1]->save;
- cc_recurse($name, $cv->ROOT, $cv->START, @padlist);
-}
-
-sub cc_main {
- my @comppadlist = comppadlist->ARRAY;
- my $curpad_sym = $comppadlist[1]->save;
- my $start = cc_recurse("pp_main", main_root, main_start, @comppadlist);
- save_unused_subs(@unused_sub_packages);
- cc_recurse();
-
- return if $errors;
- if (!defined($module)) {
- $init->add(sprintf("main_root = s\\_%x;", ${main_root()}),
- "main_start = $start;",
- "curpad = AvARRAY($curpad_sym);");
- }
- output_boilerplate();
- print "\n";
- output_all("perl_init");
- output_runtime();
- print "\n";
- output_main();
- if (defined($module)) {
- my $cmodule = $module;
- $cmodule =~ s/::/__/g;
- print <<"EOT";
-
-#include "XSUB.h"
-XS(boot_$cmodule)
-{
- dXSARGS;
- perl_init();
- ENTER;
- SAVETMPS;
- SAVESPTR(curpad);
- SAVESPTR(op);
- curpad = AvARRAY($curpad_sym);
- op = $start;
- pp_main(ARGS);
- FREETMPS;
- LEAVE;
- ST(0) = &sv_yes;
- XSRETURN(1);
-}
-EOT
- }
- if ($debug_timings) {
- warn sprintf("Done at %s\n", timing_info);
- }
-}
-
-sub compile {
- my @options = @_;
- my ($option, $opt, $arg);
- OPTION:
- while ($option = shift @options) {
- if ($option =~ /^-(.)(.*)/) {
- $opt = $1;
- $arg = $2;
- } else {
- unshift @options, $option;
- last OPTION;
- }
- if ($opt eq "-" && $arg eq "-") {
- shift @options;
- last OPTION;
- } elsif ($opt eq "o") {
- $arg ||= shift @options;
- open(STDOUT, ">$arg") or return "$arg: $!\n";
- } elsif ($opt eq "n") {
- $arg ||= shift @options;
- $module_name = $arg;
- } elsif ($opt eq "u") {
- $arg ||= shift @options;
- push(@unused_sub_packages, $arg);
- } elsif ($opt eq "f") {
- $arg ||= shift @options;
- my $value = $arg !~ s/^no-//;
- $arg =~ s/-/_/g;
- my $ref = $optimise{$arg};
- if (defined($ref)) {
- $$ref = $value;
- } else {
- warn qq(ignoring unknown optimisation option "$arg"\n);
- }
- } elsif ($opt eq "O") {
- $arg = 1 if $arg eq "";
- my $ref;
- foreach $ref (values %optimise) {
- $$ref = 0;
- }
- if ($arg >= 2) {
- $freetmps_each_loop = 1;
- }
- if ($arg >= 1) {
- $freetmps_each_bblock = 1 unless $freetmps_each_loop;
- }
- } elsif ($opt eq "m") {
- $arg ||= shift @options;
- $module = $arg;
- push(@unused_sub_packages, $arg);
- } elsif ($opt eq "p") {
- $arg ||= shift @options;
- $patchlevel = $arg;
- } elsif ($opt eq "D") {
- $arg ||= shift @options;
- foreach $arg (split(//, $arg)) {
- if ($arg eq "o") {
- B->debug(1);
- } elsif ($arg eq "O") {
- $debug_op = 1;
- } elsif ($arg eq "s") {
- $debug_stack = 1;
- } elsif ($arg eq "c") {
- $debug_cxstack = 1;
- } elsif ($arg eq "p") {
- $debug_pad = 1;
- } elsif ($arg eq "r") {
- $debug_runtime = 1;
- } elsif ($arg eq "S") {
- $debug_shadow = 1;
- } elsif ($arg eq "q") {
- $debug_queue = 1;
- } elsif ($arg eq "l") {
- $debug_lineno = 1;
- } elsif ($arg eq "t") {
- $debug_timings = 1;
- }
- }
- }
- }
- init_sections();
- $init = B::Section->get("init");
- $decl = B::Section->get("decl");
-
- if (@options) {
- return sub {
- my ($objname, $ppname);
- foreach $objname (@options) {
- $objname = "main::$objname" unless $objname =~ /::/;
- ($ppname = $objname) =~ s/^.*?:://;
- eval "cc_obj(qq(pp_sub_$ppname), \\&$objname)";
- die "cc_obj(qq(pp_sub_$ppname, \\&$objname) failed: $@" if $@;
- return if $errors;
- }
- output_boilerplate();
- print "\n";
- output_all($module_name || "init_module");
- output_runtime();
- }
- } else {
- return sub { cc_main() };
- }
-}
-
-1;
+++ /dev/null
-package B::Debug;
-use strict;
-use B qw(peekop class walkoptree walkoptree_exec
- main_start main_root cstring sv_undef);
-use B::Asmdata qw(@specialsv_name);
-
-my %done_gv;
-
-sub B::OP::debug {
- my ($op) = @_;
- printf <<'EOT', class($op), $$op, ${$op->next}, ${$op->sibling}, $op->ppaddr, $op->targ, $op->type, $op->seq, $op->flags, $op->private;
-%s (0x%lx)
- op_next 0x%x
- op_sibling 0x%x
- op_ppaddr %s
- op_targ %d
- op_type %d
- op_seq %d
- op_flags %d
- op_private %d
-EOT
-}
-
-sub B::UNOP::debug {
- my ($op) = @_;
- $op->B::OP::debug();
- printf "\top_first\t0x%x\n", ${$op->first};
-}
-
-sub B::BINOP::debug {
- my ($op) = @_;
- $op->B::UNOP::debug();
- printf "\top_last\t\t0x%x\n", ${$op->last};
-}
-
-sub B::LOGOP::debug {
- my ($op) = @_;
- $op->B::UNOP::debug();
- printf "\top_other\t0x%x\n", ${$op->other};
-}
-
-sub B::CONDOP::debug {
- my ($op) = @_;
- $op->B::UNOP::debug();
- printf "\top_true\t0x%x\n", ${$op->true};
- printf "\top_false\t0x%x\n", ${$op->false};
-}
-
-sub B::LISTOP::debug {
- my ($op) = @_;
- $op->B::BINOP::debug();
- printf "\top_children\t%d\n", $op->children;
-}
-
-sub B::PMOP::debug {
- my ($op) = @_;
- $op->B::LISTOP::debug();
- printf "\top_pmreplroot\t0x%x\n", ${$op->pmreplroot};
- printf "\top_pmreplstart\t0x%x\n", ${$op->pmreplstart};
- printf "\top_pmnext\t0x%x\n", ${$op->pmnext};
- printf "\top_pmregexp->precomp\t%s\n", cstring($op->precomp);
- printf "\top_pmflags\t0x%x\n", $op->pmflags;
- $op->pmshort->debug;
- $op->pmreplroot->debug;
-}
-
-sub B::COP::debug {
- my ($op) = @_;
- $op->B::OP::debug();
- my ($filegv) = $op->filegv;
- printf <<'EOT', $op->label, ${$op->stash}, $$filegv, $op->seq, $op->arybase, $op->line;
- cop_label %s
- cop_stash 0x%x
- cop_filegv 0x%x
- cop_seq %d
- cop_arybase %d
- cop_line %d
-EOT
- $filegv->debug;
-}
-
-sub B::SVOP::debug {
- my ($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\t0x%x\n", $op->pv;
-}
-
-sub B::GVOP::debug {
- my ($op) = @_;
- $op->B::OP::debug();
- printf "\top_gv\t\t0x%x\n", ${$op->gv};
- $op->gv->debug;
-}
-
-sub B::CVOP::debug {
- my ($op) = @_;
- $op->B::OP::debug();
- printf "\top_cv\t\t0x%x\n", ${$op->cv};
-}
-
-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, $sv->FLAGS;
-%s (0x%x)
- REFCNT %d
- FLAGS 0x%x
-EOT
-}
-
-sub B::PV::debug {
- my ($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) = $sv->PADLIST;
- my ($gv) = $sv->GV;
- my ($filegv) = $sv->FILEGV;
- printf <<'EOT', $$stash, $$start, $$root, $$gv, $$filegv, $sv->DEPTH, $padlist, ${$sv->OUTSIDE};
- STASH 0x%x
- START 0x%x
- ROOT 0x%x
- GV 0x%x
- FILEGV 0x%x
- DEPTH %d
- PADLIST 0x%x
- OUTSIDE 0x%x
-EOT
- $start->debug if $start;
- $root->debug if $root;
- $gv->debug if $gv;
- $filegv->debug if $filegv;
- $padlist->debug if $padlist;
-}
-
-sub B::AV::debug {
- my ($av) = @_;
- $av->B::SV::debug;
- my(@array) = $av->ARRAY;
- print "\tARRAY\t\t(", join(", ", map("0x" . $$_, @array)), ")\n";
- printf <<'EOT', scalar(@array), $av->MAX, $av->OFF, $av->AvFLAGS;
- FILL %d
- MAX %d
- OFF %d
- AvFLAGS %d
-EOT
-}
-
-sub B::GV::debug {
- my ($gv) = @_;
- if ($done_gv{$$gv}++) {
- printf "GV %s::%s\n", $gv->STASH->NAME, $gv->NAME;
- return;
- }
- my ($sv) = $gv->SV;
- my ($av) = $gv->AV;
- my ($cv) = $gv->CV;
- $gv->B::SV::debug;
- printf <<'EOT', $gv->NAME, $gv->STASH->NAME, $gv->STASH, $$sv, $gv->GvREFCNT, $gv->FORM, $$av, ${$gv->HV}, ${$gv->EGV}, $$cv, $gv->CVGEN, $gv->LINE, $gv->FILEGV, $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
- FILEGV 0x%x
- 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;
- if ($order eq "exec") {
- return sub { walkoptree_exec(main_start, "debug") }
- } else {
- return sub { walkoptree(main_root, "debug") }
- }
-}
-
-1;
+++ /dev/null
-package B::Deparse;
-use strict;
-use B qw(peekop class main_root);
-
-my $debug;
-
-sub compile {
- my $opt = shift;
- if ($opt eq "-d") {
- $debug = 1;
- }
- return sub { print deparse(main_root), "\n" }
-}
-
-sub ppname {
- my $op = shift;
- my $ppname = $op->ppaddr;
- warn sprintf("ppname %s\n", peekop($op)) if $debug;
- no strict "refs";
- return defined(&$ppname) ? &$ppname($op) : 0;
-}
-
-sub deparse {
- my $op = shift;
- my $expr;
- warn sprintf("deparse %s\n", peekop($op)) if $debug;
- while (ref($expr = ppname($op))) {
- $op = $expr;
- warn sprintf("Redirecting to %s\n", peekop($op)) if $debug;
- }
- return $expr;
-}
-
-sub pp_leave {
- my $op = shift;
- my ($child, $expr);
- for ($child = $op->first; !$expr; $child = $child->sibling) {
- $expr = ppname($child);
- }
- return $expr;
-}
-
-sub SWAP_CHILDREN () { 1 }
-
-sub binop {
- my ($op, $opname, $flags) = @_;
- my $left = $op->first;
- my $right = $op->last;
- if ($flags & SWAP_CHILDREN) {
- ($left, $right) = ($right, $left);
- }
- warn sprintf("binop deparsing first %s\n", peekop($op->first)) if $debug;
- $left = deparse($left);
- warn sprintf("binop deparsing last %s\n", peekop($op->last)) if $debug;
- $right = deparse($right);
- return "($left $opname $right)";
-}
-
-sub pp_add { binop($_[0], "+") }
-sub pp_multiply { binop($_[0], "*") }
-sub pp_subtract { binop($_[0], "-") }
-sub pp_divide { binop($_[0], "/") }
-sub pp_modulo { binop($_[0], "%") }
-sub pp_eq { binop($_[0], "==") }
-sub pp_ne { binop($_[0], "!=") }
-sub pp_lt { binop($_[0], "<") }
-sub pp_gt { binop($_[0], ">") }
-sub pp_ge { binop($_[0], ">=") }
-
-sub pp_sassign { binop($_[0], "=", SWAP_CHILDREN) }
-
-sub pp_null {
- my $op = shift;
- warn sprintf("Skipping null op %s\n", peekop($op)) if $debug;
- return $op->first;
-}
-
-sub pp_const {
- my $op = shift;
- my $sv = $op->sv;
- if (class($sv) eq "IV") {
- return $sv->IV;
- } elsif (class($sv) eq "NV") {
- return $sv->NV;
- } else {
- return $sv->PV;
- }
-}
-
-sub pp_gvsv {
- my $op = shift;
- my $gv = $op->gv;
- my $stash = $gv->STASH->NAME;
- if ($stash eq "main") {
- $stash = "";
- } else {
- $stash = $stash . "::";
- }
- return sprintf('$%s%s', $stash, $gv->NAME);
-}
-
-1;
+++ /dev/null
-# Disassembler.pm
-#
-# Copyright (c) 1996 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-package B::Disassembler::BytecodeStream;
-use FileHandle;
-use Carp;
-use B qw(cstring cast_I32);
-@ISA = qw(FileHandle);
-sub readn {
- my ($fh, $len) = @_;
- my $data;
- read($fh, $data, $len);
- croak "reached EOF while reading $len bytes" unless length($data) == $len;
- return $data;
-}
-
-sub GET_U8 {
- my $fh = shift;
- my $c = $fh->getc;
- croak "reached EOF while reading U8" unless defined($c);
- return ord($c);
-}
-
-sub GET_U16 {
- my $fh = shift;
- my $str = $fh->readn(2);
- croak "reached EOF while reading U16" unless length($str) == 2;
- return unpack("n", $str);
-}
-
-sub GET_U32 {
- my $fh = shift;
- my $str = $fh->readn(4);
- croak "reached EOF while reading U32" unless length($str) == 4;
- return unpack("N", $str);
-}
-
-sub GET_I32 {
- my $fh = shift;
- my $str = $fh->readn(4);
- croak "reached EOF while reading I32" unless length($str) == 4;
- return cast_I32(unpack("N", $str));
-}
-
-sub GET_objindex {
- my $fh = shift;
- my $str = $fh->readn(4);
- croak "reached EOF while reading objindex" unless length($str) == 4;
- return unpack("N", $str);
-}
-
-sub GET_strconst {
- my $fh = shift;
- my ($str, $c);
- while (defined($c = $fh->getc) && $c ne "\0") {
- $str .= $c;
- }
- croak "reached EOF while reading strconst" unless defined($c);
- return cstring($str);
-}
-
-sub GET_pvcontents {}
-
-sub GET_PV {
- my $fh = shift;
- my $str;
- my $len = $fh->GET_U32;
- if ($len) {
- read($fh, $str, $len);
- croak "reached EOF while reading PV" unless length($str) == $len;
- return cstring($str);
- } else {
- return '""';
- }
-}
-
-sub GET_comment {
- my $fh = shift;
- my ($str, $c);
- while (defined($c = $fh->getc) && $c ne "\n") {
- $str .= $c;
- }
- croak "reached EOF while reading comment" unless defined($c);
- return cstring($str);
-}
-
-sub GET_double {
- my $fh = shift;
- my ($str, $c);
- while (defined($c = $fh->getc) && $c ne "\0") {
- $str .= $c;
- }
- croak "reached EOF while reading double" unless defined($c);
- return $str;
-}
-
-sub GET_none {}
-
-sub GET_op_tr_array {
- my $fh = shift;
- my @ary = unpack("n256", $fh->readn(256 * 2));
- return join(",", @ary);
-}
-
-sub GET_IV64 {
- my $fh = shift;
- my ($hi, $lo) = unpack("NN", $fh->readn(8));
- return sprintf("0x%4x%04x", $hi, $lo); # cheat
-}
-
-package B::Disassembler;
-use Exporter;
-@ISA = qw(Exporter);
-@EXPORT_OK = qw(disassemble_fh);
-use Carp;
-use strict;
-
-use B::Asmdata qw(%insn_data @insn_name);
-
-sub disassemble_fh {
- my ($fh, $out) = @_;
- my ($c, $getmeth, $insn, $arg);
- bless $fh, "B::Disassembler::BytecodeStream";
- while (defined($c = $fh->getc)) {
- $c = ord($c);
- $insn = $insn_name[$c];
- if (!defined($insn) || $insn eq "unused") {
- my $pos = $fh->tell - 1;
- die "Illegal instruction code $c at stream offset $pos\n";
- }
- $getmeth = $insn_data{$insn}->[2];
- $arg = $fh->$getmeth();
- if (defined($arg)) {
- &$out($insn, $arg);
- } else {
- &$out($insn);
- }
- }
-}
-
-1;
+++ /dev/null
-package B::Lint;
-
-=head1 NAME
-
-B::Lint - Perl lint
-
-=head1 SYNOPSIS
-
-perl -MO=Lint[,OPTIONS] foo.pl
-
-=head1 DESCRIPTION
-
-The B::Lint module is equivalent to an extended version of the B<-w>
-option of B<perl>. It is named after the program B<lint> which carries
-out a similar process for C programs.
-
-=head1 OPTIONS AND LINT CHECKS
-
-Option words are separated by commas (not whitespace) and follow the
-usual conventions of compiler backend options. Following any options
-(indicated by a leading B<->) come lint check arguments. Each such
-argument (apart from the special B<all> and B<none> options) is a
-word representing one possible lint check (turning on that check) or
-is B<no-foo> (turning off that check). Before processing the check
-arguments, a standard list of checks is turned on. Later options
-override earlier ones. Available options are:
-
-=over 8
-
-=item B<context>
-
-Produces a warning whenever an array is used in an implicit scalar
-context. For example, both of the lines
-
- $foo = length(@bar);
- $foo = @bar;
-will elicit a warning. Using an explicit B<scalar()> silences the
-warning. For example,
-
- $foo = scalar(@bar);
-
-=item B<implicit-read> and B<implicit-write>
-
-These options produce a warning whenever an operation implicitly
-reads or (respectively) writes to one of Perl's special variables.
-For example, B<implicit-read> will warn about these:
-
- /foo/;
-
-and B<implicit-write> will warn about these:
-
- s/foo/bar/;
-
-Both B<implicit-read> and B<implicit-write> warn about this:
-
- for (@a) { ... }
-
-=item B<dollar-underscore>
-
-This option warns whenever $_ is used either explicitly anywhere or
-as the implicit argument of a B<print> statement.
-
-=item B<private-names>
-
-This option warns on each use of any variable, subroutine or
-method name that lives in a non-current package but begins with
-an underscore ("_"). Warnings aren't issued for the special case
-of the single character name "_" by itself (e.g. $_ and @_).
-
-=item B<undefined-subs>
-
-This option warns whenever an undefined subroutine is invoked.
-This option will only catch explicitly invoked subroutines such
-as C<foo()> and not indirect invocations such as C<&$subref()>
-or C<$obj-E<gt>meth()>. Note that some programs or modules delay
-definition of subs until runtime by means of the AUTOLOAD
-mechanism.
-
-=item B<regexp-variables>
-
-This option warns whenever one of the regexp variables $', $& or
-$' is used. Any occurrence of any of these variables in your
-program can slow your whole program down. See L<perlre> for
-details.
-
-=item B<all>
-
-Turn all warnings on.
-
-=item B<none>
-
-Turn all warnings off.
-
-=back
-
-=head1 NON LINT-CHECK OPTIONS
-
-=over 8
-
-=item B<-u Package>
-
-Normally, Lint only checks the main code of the program together
-with all subs defined in package main. The B<-u> option lets you
-include other package names whose subs are then checked by Lint.
-
-=back
-
-=head1 BUGS
-
-This is only a very preliminary version.
-
-=head1 AUTHOR
-
-Malcolm Beattie, mbeattie@sable.ox.ac.uk.
-
-=cut
-
-use strict;
-use B qw(walkoptree_slow main_root walksymtable svref_2object parents);
-
-# Constants (should probably be elsewhere)
-sub G_ARRAY () { 1 }
-sub OPf_LIST () { 1 }
-sub OPf_KNOW () { 2 }
-sub OPf_STACKED () { 64 }
-
-my $file = "unknown"; # shadows current filename
-my $line = 0; # shadows current line number
-my $curstash = "main"; # shadows current stash
-
-# Lint checks
-my %check;
-my %implies_ok_context;
-BEGIN {
- map($implies_ok_context{$_}++,
- qw(pp_scalar pp_av2arylen pp_aelem pp_aslice pp_helem pp_hslice
- pp_keys pp_values pp_hslice pp_defined pp_undef pp_delete));
-}
-
-# Lint checks turned on by default
-my @default_checks = qw(context);
-
-my %valid_check;
-# All valid checks
-BEGIN {
- map($valid_check{$_}++,
- qw(context implicit_read implicit_write dollar_underscore
- private_names undefined_subs regexp_variables));
-}
-
-# Debugging options
-my ($debug_op);
-
-my %done_cv; # used to mark which subs have already been linted
-my @extra_packages; # Lint checks mainline code and all subs which are
- # in main:: or in one of these packages.
-
-sub warning {
- my $format = (@_ < 2) ? "%s" : shift;
- warn sprintf("$format at %s line %d\n", @_, $file, $line);
-}
-
-# This gimme can't cope with context that's only determined
-# at runtime via dowantarray().
-sub gimme {
- my $op = shift;
- my $flags = $op->flags;
- if ($flags & OPf_KNOW) {
- return(($flags & OPf_LIST) ? 1 : 0);
- }
- return undef;
-}
-
-sub B::OP::lint {}
-
-sub B::COP::lint {
- my $op = shift;
- if ($op->ppaddr eq "pp_nextstate") {
- $file = $op->filegv->SV->PV;
- $line = $op->line;
- $curstash = $op->stash->NAME;
- }
-}
-
-sub B::UNOP::lint {
- my $op = shift;
- my $ppaddr = $op->ppaddr;
- if ($check{context} && ($ppaddr eq "pp_rv2av" || $ppaddr eq "pp_rv2hv")) {
- my $parent = parents->[0];
- my $pname = $parent->ppaddr;
- return if gimme($op) || $implies_ok_context{$pname};
- # Two special cases to deal with: "foreach (@foo)" and "delete $a{$b}"
- # null out the parent so we have to check for a parent of pp_null and
- # a grandparent of pp_enteriter or pp_delete
- if ($pname eq "pp_null") {
- my $gpname = parents->[1]->ppaddr;
- return if $gpname eq "pp_enteriter" || $gpname eq "pp_delete";
- }
- warning("Implicit scalar context for %s in %s",
- $ppaddr eq "pp_rv2av" ? "array" : "hash", $parent->desc);
- }
- if ($check{private_names} && $ppaddr eq "pp_method") {
- my $methop = $op->first;
- if ($methop->ppaddr eq "pp_const") {
- my $method = $methop->sv->PV;
- if ($method =~ /^_/ && !defined(&{"$curstash\::$method"})) {
- warning("Illegal reference to private method name $method");
- }
- }
- }
-}
-
-sub B::PMOP::lint {
- my $op = shift;
- if ($check{implicit_read}) {
- my $ppaddr = $op->ppaddr;
- if ($ppaddr eq "pp_match" && !($op->flags & OPf_STACKED)) {
- warning('Implicit match on $_');
- }
- }
- if ($check{implicit_write}) {
- my $ppaddr = $op->ppaddr;
- if ($ppaddr eq "pp_subst" && !($op->flags & OPf_STACKED)) {
- warning('Implicit substitution on $_');
- }
- }
-}
-
-sub B::LOOP::lint {
- my $op = shift;
- if ($check{implicit_read} || $check{implicit_write}) {
- my $ppaddr = $op->ppaddr;
- if ($ppaddr eq "pp_enteriter") {
- my $last = $op->last;
- if ($last->ppaddr eq "pp_gv" && $last->gv->NAME eq "_") {
- warning('Implicit use of $_ in foreach');
- }
- }
- }
-}
-
-sub B::GVOP::lint {
- my $op = shift;
- if ($check{dollar_underscore} && $op->ppaddr eq "pp_gvsv"
- && $op->gv->NAME eq "_")
- {
- warning('Use of $_');
- }
- if ($check{private_names}) {
- my $ppaddr = $op->ppaddr;
- my $gv = $op->gv;
- if (($ppaddr eq "pp_gv" || $ppaddr eq "pp_gvsv")
- && $gv->NAME =~ /^_./ && $gv->STASH->NAME ne $curstash)
- {
- warning('Illegal reference to private name %s', $gv->NAME);
- }
- }
- if ($check{undefined_subs}) {
- if ($op->ppaddr eq "pp_gv" && $op->next->ppaddr eq "pp_entersub") {
- my $gv = $op->gv;
- my $subname = $gv->STASH->NAME . "::" . $gv->NAME;
- no strict 'refs';
- if (!defined(&$subname)) {
- $subname =~ s/^main:://;
- warning('Undefined subroutine %s called', $subname);
- }
- }
- }
- if ($check{regexp_variables} && $op->ppaddr eq "pp_gvsv") {
- my $name = $op->gv->NAME;
- if ($name =~ /^[&'`]$/) {
- warning('Use of regexp variable $%s', $name);
- }
- }
-}
-
-sub B::GV::lintcv {
- my $gv = shift;
- my $cv = $gv->CV;
- #warn sprintf("lintcv: %s::%s (done=%d)\n",
- # $gv->STASH->NAME, $gv->NAME, $done_cv{$$cv});#debug
- return if !$$cv || $done_cv{$$cv}++;
- my $root = $cv->ROOT;
- #warn " root = $root (0x$$root)\n";#debug
- walkoptree_slow($root, "lint") if $$root;
-}
-
-sub do_lint {
- my %search_pack;
- walkoptree_slow(main_root, "lint") if ${main_root()};
-
- # Now do subs in main
- no strict qw(vars refs);
- my $sym;
- local(*glob);
- while (($sym, *glob) = each %{"main::"}) {
- #warn "Trying $sym\n";#debug
- svref_2object(\*glob)->EGV->lintcv unless $sym =~ /::$/;
- }
-
- # Now do subs in non-main packages given by -u options
- map { $search_pack{$_} = 1 } @extra_packages;
- walksymtable(\%{"main::"}, "lintcv", sub {
- my $package = shift;
- $package =~ s/::$//;
- #warn "Considering $package\n";#debug
- return exists $search_pack{$package};
- });
-}
-
-sub compile {
- my @options = @_;
- my ($option, $opt, $arg);
- # Turn on default lint checks
- for $opt (@default_checks) {
- $check{$opt} = 1;
- }
- OPTION:
- while ($option = shift @options) {
- if ($option =~ /^-(.)(.*)/) {
- $opt = $1;
- $arg = $2;
- } else {
- unshift @options, $option;
- last OPTION;
- }
- if ($opt eq "-" && $arg eq "-") {
- shift @options;
- last OPTION;
- } elsif ($opt eq "D") {
- $arg ||= shift @options;
- foreach $arg (split(//, $arg)) {
- if ($arg eq "o") {
- B->debug(1);
- } elsif ($arg eq "O") {
- $debug_op = 1;
- }
- }
- } elsif ($opt eq "u") {
- $arg ||= shift @options;
- push(@extra_packages, $arg);
- }
- }
- foreach $opt (@default_checks, @options) {
- $opt =~ tr/-/_/;
- if ($opt eq "all") {
- %check = %valid_check;
- }
- elsif ($opt eq "none") {
- %check = ();
- }
- else {
- if ($opt =~ s/^no-//) {
- $check{$opt} = 0;
- }
- else {
- $check{$opt} = 1;
- }
- warn "No such check: $opt\n" unless defined $valid_check{$opt};
- }
- }
- # Remaining arguments are things to check
-
- return \&do_lint;
-}
-
-1;
+++ /dev/null
-package B::Showlex;
-use strict;
-use B qw(svref_2object comppadlist class);
-use B::Terse ();
-
-#
-# Invoke as
-# perl -MO=Showlex,foo bar.pl
-# to see the names of lexical variables used by &foo
-# or as
-# perl -MO=Showlex bar.pl
-# to see the names of file scope lexicals used by bar.pl
-#
-
-sub showarray {
- my ($name, $av) = @_;
- my @els = $av->ARRAY;
- my $count = @els;
- my $i;
- print "$name has $count entries\n";
- for ($i = 0; $i < $count; $i++) {
- print "$i: ";
- $els[$i]->terse;
- }
-}
-
-sub showlex {
- my ($objname, $namesav, $valsav) = @_;
- showarray("Pad of lexical names for $objname", $namesav);
- showarray("Pad of lexical values for $objname", $valsav);
-}
-
-sub showlex_obj {
- my ($objname, $obj) = @_;
- $objname =~ s/^&main::/&/;
- showlex($objname, svref_2object($obj)->PADLIST->ARRAY);
-}
-
-sub showlex_main {
- showlex("comppadlist", comppadlist->ARRAY);
-}
-
-sub compile {
- my @options = @_;
- if (@options) {
- return sub {
- my $objname;
- foreach $objname (@options) {
- $objname = "main::$objname" unless $objname =~ /::/;
- eval "showlex_obj('&$objname', \\&$objname)";
- }
- }
- } else {
- return \&showlex_main;
- }
-}
-
-1;
+++ /dev/null
-# Stackobj.pm
-#
-# Copyright (c) 1996 Malcolm Beattie
-#
-# You may distribute under the terms of either the GNU General Public
-# License or the Artistic License, as specified in the README file.
-#
-package B::Stackobj;
-use Exporter ();
-@ISA = qw(Exporter);
-@EXPORT_OK = qw(set_callback T_UNKNOWN T_DOUBLE T_INT
- VALID_INT VALID_DOUBLE VALID_SV REGISTER TEMPORARY);
-%EXPORT_TAGS = (types => [qw(T_UNKNOWN T_DOUBLE T_INT)],
- flags => [qw(VALID_INT VALID_DOUBLE VALID_SV
- REGISTER TEMPORARY)]);
-
-use Carp qw(confess);
-use strict;
-use B qw(class);
-
-# Perl internal constants that I should probably define elsewhere.
-sub SVf_IOK () { 0x10000 }
-sub SVf_NOK () { 0x20000 }
-
-# Types
-sub T_UNKNOWN () { 0 }
-sub T_DOUBLE () { 1 }
-sub T_INT () { 2 }
-
-# Flags
-sub VALID_INT () { 0x01 }
-sub VALID_DOUBLE () { 0x02 }
-sub VALID_SV () { 0x04 }
-sub REGISTER () { 0x08 } # no implicit write-back when calling subs
-sub TEMPORARY () { 0x10 } # no implicit write-back needed at all
-
-#
-# Callback for runtime code generation
-#
-my $runtime_callback = sub { confess "set_callback not yet called" };
-sub set_callback (&) { $runtime_callback = shift }
-sub runtime { &$runtime_callback(@_) }
-
-#
-# Methods
-#
-
-sub write_back { confess "stack object does not implement write_back" }
-
-sub invalidate { shift->{flags} &= ~(VALID_INT | VALID_DOUBLE) }
-
-sub as_sv {
- my $obj = shift;
- if (!($obj->{flags} & VALID_SV)) {
- $obj->write_back;
- $obj->{flags} |= VALID_SV;
- }
- return $obj->{sv};
-}
-
-sub as_int {
- my $obj = shift;
- if (!($obj->{flags} & VALID_INT)) {
- $obj->load_int;
- $obj->{flags} |= VALID_INT;
- }
- return $obj->{iv};
-}
-
-sub as_double {
- my $obj = shift;
- if (!($obj->{flags} & VALID_DOUBLE)) {
- $obj->load_double;
- $obj->{flags} |= VALID_DOUBLE;
- }
- return $obj->{nv};
-}
-
-sub as_numeric {
- my $obj = shift;
- return $obj->{type} == T_INT ? $obj->as_int : $obj->as_double;
-}
-
-#
-# Debugging methods
-#
-sub peek {
- my $obj = shift;
- my $type = $obj->{type};
- my $flags = $obj->{flags};
- my @flags;
- if ($type == T_UNKNOWN) {
- $type = "T_UNKNOWN";
- } elsif ($type == T_INT) {
- $type = "T_INT";
- } elsif ($type == T_DOUBLE) {
- $type = "T_DOUBLE";
- } else {
- $type = "(illegal type $type)";
- }
- push(@flags, "VALID_INT") if $flags & VALID_INT;
- push(@flags, "VALID_DOUBLE") if $flags & VALID_DOUBLE;
- push(@flags, "VALID_SV") if $flags & VALID_SV;
- push(@flags, "REGISTER") if $flags & REGISTER;
- push(@flags, "TEMPORARY") if $flags & TEMPORARY;
- @flags = ("none") unless @flags;
- return sprintf("%s type=$type flags=%s sv=$obj->{sv}",
- class($obj), join("|", @flags));
-}
-
-sub minipeek {
- my $obj = shift;
- my $type = $obj->{type};
- my $flags = $obj->{flags};
- if ($type == T_INT || $flags & VALID_INT) {
- return $obj->{iv};
- } elsif ($type == T_DOUBLE || $flags & VALID_DOUBLE) {
- return $obj->{nv};
- } else {
- return $obj->{sv};
- }
-}
-
-#
-# Caller needs to ensure that set_int, set_double,
-# set_numeric and set_sv are only invoked on legal lvalues.
-#
-sub set_int {
- my ($obj, $expr) = @_;
- runtime("$obj->{iv} = $expr;");
- $obj->{flags} &= ~(VALID_SV | VALID_DOUBLE);
- $obj->{flags} |= VALID_INT;
-}
-
-sub set_double {
- my ($obj, $expr) = @_;
- runtime("$obj->{nv} = $expr;");
- $obj->{flags} &= ~(VALID_SV | VALID_INT);
- $obj->{flags} |= VALID_DOUBLE;
-}
-
-sub set_numeric {
- my ($obj, $expr) = @_;
- if ($obj->{type} == T_INT) {
- $obj->set_int($expr);
- } else {
- $obj->set_double($expr);
- }
-}
-
-sub set_sv {
- my ($obj, $expr) = @_;
- runtime("SvSetSV($obj->{sv}, $expr);");
- $obj->invalidate;
- $obj->{flags} |= VALID_SV;
-}
-
-#
-# Stackobj::Padsv
-#
-
-@B::Stackobj::Padsv::ISA = 'B::Stackobj';
-sub B::Stackobj::Padsv::new {
- my ($class, $type, $extra_flags, $ix, $iname, $dname) = @_;
- bless {
- type => $type,
- flags => VALID_SV | $extra_flags,
- sv => "curpad[$ix]",
- iv => "$iname",
- nv => "$dname"
- }, $class;
-}
-
-sub B::Stackobj::Padsv::load_int {
- my $obj = shift;
- if ($obj->{flags} & VALID_DOUBLE) {
- runtime("$obj->{iv} = $obj->{nv};");
- } else {
- runtime("$obj->{iv} = SvIV($obj->{sv});");
- }
- $obj->{flags} |= VALID_INT;
-}
-
-sub B::Stackobj::Padsv::load_double {
- my $obj = shift;
- $obj->write_back;
- runtime("$obj->{nv} = SvNV($obj->{sv});");
- $obj->{flags} |= VALID_DOUBLE;
-}
-
-sub B::Stackobj::Padsv::write_back {
- my $obj = shift;
- my $flags = $obj->{flags};
- return if $flags & VALID_SV;
- if ($flags & VALID_INT) {
- runtime("sv_setiv($obj->{sv}, $obj->{iv});");
- } elsif ($flags & VALID_DOUBLE) {
- runtime("sv_setnv($obj->{sv}, $obj->{nv});");
- } else {
- confess "write_back failed for lexical @{[$obj->peek]}\n";
- }
- $obj->{flags} |= VALID_SV;
-}
-
-#
-# Stackobj::Const
-#
-
-@B::Stackobj::Const::ISA = 'B::Stackobj';
-sub B::Stackobj::Const::new {
- my ($class, $sv) = @_;
- my $obj = bless {
- flags => 0,
- sv => $sv # holds the SV object until write_back happens
- }, $class;
- my $svflags = $sv->FLAGS;
- if ($svflags & SVf_IOK) {
- $obj->{flags} = VALID_INT|VALID_DOUBLE;
- $obj->{type} = T_INT;
- $obj->{nv} = $obj->{iv} = $sv->IV;
- } elsif ($svflags & SVf_NOK) {
- $obj->{flags} = VALID_INT|VALID_DOUBLE;
- $obj->{type} = T_DOUBLE;
- $obj->{iv} = $obj->{nv} = $sv->NV;
- } else {
- $obj->{type} = T_UNKNOWN;
- }
- return $obj;
-}
-
-sub B::Stackobj::Const::write_back {
- my $obj = shift;
- return if $obj->{flags} & VALID_SV;
- # Save the SV object and replace $obj->{sv} by its C source code name
- $obj->{sv} = $obj->{sv}->save;
- $obj->{flags} |= VALID_SV|VALID_INT|VALID_DOUBLE;
-}
-
-sub B::Stackobj::Const::load_int {
- my $obj = shift;
- $obj->{iv} = int($obj->{sv}->PV);
- $obj->{flags} |= VALID_INT;
-}
-
-sub B::Stackobj::Const::load_double {
- my $obj = shift;
- $obj->{nv} = $obj->{sv}->PV + 0.0;
- $obj->{flags} |= VALID_DOUBLE;
-}
-
-sub B::Stackobj::Const::invalidate {}
-
-#
-# Stackobj::Bool
-#
-
-@B::Stackobj::Bool::ISA = 'B::Stackobj';
-sub B::Stackobj::Bool::new {
- my ($class, $preg) = @_;
- my $obj = bless {
- type => T_INT,
- flags => VALID_INT|VALID_DOUBLE,
- iv => $$preg,
- nv => $$preg,
- preg => $preg # this holds our ref to the pseudo-reg
- }, $class;
- return $obj;
-}
-
-sub B::Stackobj::Bool::write_back {
- my $obj = shift;
- return if $obj->{flags} & VALID_SV;
- $obj->{sv} = "($obj->{iv} ? &sv_yes : &sv_no)";
- $obj->{flags} |= VALID_SV;
-}
-
-# XXX Might want to handle as_double/set_double/load_double?
-
-sub B::Stackobj::Bool::invalidate {}
-
-1;
+++ /dev/null
-package B::Terse;
-use strict;
-use B qw(peekop class walkoptree_slow walkoptree_exec
- main_start main_root cstring svref_2object);
-use B::Asmdata qw(@specialsv_name);
-
-sub terse {
- my ($order, $cvref) = @_;
- my $cv = svref_2object($cvref);
- if ($order eq "exec") {
- walkoptree_exec($cv->START, "terse");
- } else {
- walkoptree_slow($cv->ROOT, "terse");
- }
-}
-
-sub compile {
- my $order = shift;
- my @options = @_;
- if (@options) {
- return sub {
- my $objname;
- foreach $objname (@options) {
- $objname = "main::$objname" unless $objname =~ /::/;
- eval "terse(\$order, \\&$objname)";
- die "terse($order, \\&$objname) failed: $@" if $@;
- }
- }
- } else {
- if ($order eq "exec") {
- return sub { walkoptree_exec(main_start, "terse") }
- } else {
- return sub { walkoptree_slow(main_root, "terse") }
- }
- }
-}
-
-sub indent {
- my $level = shift;
- return " " x $level;
-}
-
-sub B::OP::terse {
- my ($op, $level) = @_;
- my $targ = $op->targ;
- $targ = ($targ > 0) ? " [$targ]" : "";
- print indent($level), peekop($op), $targ, "\n";
-}
-
-sub B::SVOP::terse {
- my ($op, $level) = @_;
- print indent($level), peekop($op), " ";
- $op->sv->terse(0);
-}
-
-sub B::GVOP::terse {
- my ($op, $level) = @_;
- print indent($level), peekop($op), " ";
- $op->gv->terse(0);
-}
-
-sub B::PMOP::terse {
- my ($op, $level) = @_;
- my $precomp = $op->precomp;
- print indent($level), peekop($op),
- defined($precomp) ? " /$precomp/\n" : " (regexp not compiled)\n";
-
-}
-
-sub B::PVOP::terse {
- my ($op, $level) = @_;
- print indent($level), peekop($op), " ", cstring($op->pv), "\n";
-}
-
-sub B::COP::terse {
- my ($op, $level) = @_;
- my $label = $op->label;
- if ($label) {
- $label = " label ".cstring($label);
- }
- print indent($level), peekop($op), $label, "\n";
-}
-
-sub B::PV::terse {
- my ($sv, $level) = @_;
- print indent($level);
- printf "%s (0x%lx) %s\n", class($sv), $$sv, cstring($sv->PV);
-}
-
-sub B::AV::terse {
- my ($sv, $level) = @_;
- print indent($level);
- printf "%s (0x%lx) FILL %d\n", class($sv), $$sv, $sv->FILL;
-}
-
-sub B::GV::terse {
- my ($gv, $level) = @_;
- my $stash = $gv->STASH->NAME;
- if ($stash eq "main") {
- $stash = "";
- } else {
- $stash = $stash . "::";
- }
- print indent($level);
- printf "%s (0x%lx) *%s%s\n", class($gv), $$gv, $stash, $gv->NAME;
-}
-
-sub B::IV::terse {
- my ($sv, $level) = @_;
- print indent($level);
- printf "%s (0x%lx) %d\n", class($sv), $$sv, $sv->IV;
-}
-
-sub B::NV::terse {
- my ($sv, $level) = @_;
- print indent($level);
- printf "%s (0x%lx) %s\n", class($sv), $$sv, $sv->NV;
-}
-
-sub B::NULL::terse {
- my ($sv, $level) = @_;
- print indent($level);
- printf "%s (0x%lx)\n", class($sv), $$sv;
-}
-
-sub B::SPECIAL::terse {
- my ($sv, $level) = @_;
- print indent($level);
- printf "%s #%d %s\n", class($sv), $$sv, $specialsv_name[$$sv];
-}
-
-1;
+++ /dev/null
-package B::Xref;
-
-=head1 NAME
-
-B::Xref - Generates cross reference reports for Perl programs
-
-=head1 SYNOPSIS
-
-perl -MO=Xref[,OPTIONS] foo.pl
-
-=head1 DESCRIPTION
-
-The B::Xref module is used to generate a cross reference listing of all
-definitions and uses of variables, subroutines and formats in a Perl program.
-It is implemented as a backend for the Perl compiler.
-
-The report generated is in the following format:
-
- File filename1
- Subroutine subname1
- Package package1
- object1 C<line numbers>
- object2 C<line numbers>
- ...
- Package package2
- ...
-
-Each B<File> section reports on a single file. Each B<Subroutine> section
-reports on a single subroutine apart from the special cases
-"(definitions)" and "(main)". These report, respectively, on subroutine
-definitions found by the initial symbol table walk and on the main part of
-the program or module external to all subroutines.
-
-The report is then grouped by the B<Package> of each variable,
-subroutine or format with the special case "(lexicals)" meaning
-lexical variables. Each B<object> name (implicitly qualified by its
-containing B<Package>) includes its type character(s) at the beginning
-where possible. Lexical variables are easier to track and even
-included dereferencing information where possible.
-
-The C<line numbers> are a comma separated list of line numbers (some
-preceded by code letters) where that object is used in some way.
-Simple uses aren't preceded by a code letter. Introductions (such as
-where a lexical is first defined with C<my>) are indicated with the
-letter "i". Subroutine and method calls are indicated by the character
-"&". Subroutine definitions are indicated by "s" and format
-definitions by "f".
-
-=head1 OPTIONS
-
-Option words are separated by commas (not whitespace) and follow the
-usual conventions of compiler backend options.
-
-=over 8
-
-=item C<-oFILENAME>
-
-Directs output to C<FILENAME> instead of standard output.
-
-=item C<-r>
-
-Raw output. Instead of producing a human-readable report, outputs a line
-in machine-readable form for each definition/use of a variable/sub/format.
-
-=item C<-D[tO]>
-
-(Internal) debug options, probably only useful if C<-r> included.
-The C<t> option prints the object on the top of the stack as it's
-being tracked. The C<O> option prints each operator as it's being
-processed in the execution order of the program.
-
-=back
-
-=head1 BUGS
-
-Non-lexical variables are quite difficult to track through a program.
-Sometimes the type of a non-lexical variable's use is impossible to
-determine. Introductions of non-lexical non-scalars don't seem to be
-reported properly.
-
-=head1 AUTHOR
-
-Malcolm Beattie, mbeattie@sable.ox.ac.uk.
-
-=cut
-
-use strict;
-use B qw(peekop class comppadlist main_start svref_2object walksymtable);
-
-# Constants (should probably be elsewhere)
-sub OPpLVAL_INTRO () { 128 }
-sub SVf_POK () { 0x40000 }
-
-sub UNKNOWN { ["?", "?", "?"] }
-
-my @pad; # lexicals in current pad
- # as ["(lexical)", type, name]
-my %done; # keyed by $$op: set when each $op is done
-my $top = UNKNOWN; # shadows top element of stack as
- # [pack, type, name] (pack can be "(lexical)")
-my $file; # shadows current filename
-my $line; # shadows current line number
-my $subname; # shadows current sub name
-my %table; # Multi-level hash to record all uses etc.
-my @todo = (); # List of CVs that need processing
-
-my %code = (intro => "i", used => "",
- subdef => "s", subused => "&",
- formdef => "f", meth => "->");
-
-
-# Options
-my ($debug_op, $debug_top, $nodefs, $raw);
-
-sub process {
- my ($var, $event) = @_;
- my ($pack, $type, $name) = @$var;
- if ($type eq "*") {
- if ($event eq "used") {
- return;
- } elsif ($event eq "subused") {
- $type = "&";
- }
- }
- $type =~ s/(.)\*$/$1/g;
- if ($raw) {
- printf "%-16s %-12s %5d %-12s %4s %-16s %s\n",
- $file, $subname, $line, $pack, $type, $name, $event;
- } else {
- # Wheee
- push(@{$table{$file}->{$subname}->{$pack}->{$type.$name}->{$event}},
- $line);
- }
-}
-
-sub load_pad {
- my $padlist = shift;
- my ($namelistav, @namelist, $ix);
- @pad = ();
- return if class($padlist) eq "SPECIAL";
- ($namelistav) = $padlist->ARRAY;
- @namelist = $namelistav->ARRAY;
- for ($ix = 1; $ix < @namelist; $ix++) {
- my $namesv = $namelist[$ix];
- next if class($namesv) eq "SPECIAL";
- my ($type, $name) = $namesv->PV =~ /^(.)(.*)$/;
- $pad[$ix] = ["(lexical)", $type, $name];
- }
-}
-
-sub xref {
- my $start = shift;
- my $op;
- for ($op = $start; $$op; $op = $op->next) {
- last if $done{$$op}++;
- warn sprintf("top = [%s, %s, %s]\n", @$top) if $debug_top;
- warn peekop($op), "\n" if $debug_op;
- my $ppname = $op->ppaddr;
- if ($ppname =~ /^pp_(or|and|mapwhile|grepwhile)$/) {
- xref($op->other);
- } elsif ($ppname eq "pp_match" || $ppname eq "pp_subst") {
- xref($op->pmreplstart);
- } elsif ($ppname eq "pp_substcont") {
- xref($op->other->pmreplstart);
- $op = $op->other;
- redo;
- } elsif ($ppname eq "pp_cond_expr") {
- # pp_cond_expr never returns op_next
- xref($op->true);
- $op = $op->false;
- redo;
- } elsif ($ppname eq "pp_enterloop") {
- xref($op->redoop);
- xref($op->nextop);
- xref($op->lastop);
- } elsif ($ppname eq "pp_subst") {
- xref($op->pmreplstart);
- } else {
- no strict 'refs';
- &$ppname($op) if defined(&$ppname);
- }
- }
-}
-
-sub xref_cv {
- my $cv = shift;
- my $pack = $cv->GV->STASH->NAME;
- $subname = ($pack eq "main" ? "" : "$pack\::") . $cv->GV->NAME;
- load_pad($cv->PADLIST);
- xref($cv->START);
- $subname = "(main)";
-}
-
-sub xref_object {
- my $cvref = shift;
- xref_cv(svref_2object($cvref));
-}
-
-sub xref_main {
- $subname = "(main)";
- load_pad(comppadlist);
- xref(main_start);
- while (@todo) {
- xref_cv(shift @todo);
- }
-}
-
-sub pp_nextstate {
- my $op = shift;
- $file = $op->filegv->SV->PV;
- $line = $op->line;
- $top = UNKNOWN;
-}
-
-sub pp_padsv {
- my $op = shift;
- $top = $pad[$op->targ];
- process($top, $op->private & OPpLVAL_INTRO ? "intro" : "used");
-}
-
-sub pp_padav { pp_padsv(@_) }
-sub pp_padhv { pp_padsv(@_) }
-
-sub deref {
- my ($var, $as) = @_;
- $var->[1] = $as . $var->[1];
- process($var, "used");
-}
-
-sub pp_rv2cv { deref($top, "&"); }
-sub pp_rv2hv { deref($top, "%"); }
-sub pp_rv2sv { deref($top, "\$"); }
-sub pp_rv2av { deref($top, "\@"); }
-sub pp_rv2gv { deref($top, "*"); }
-
-sub pp_gvsv {
- my $op = shift;
- my $gv = $op->gv;
- $top = [$gv->STASH->NAME, '$', $gv->NAME];
- process($top, $op->private & OPpLVAL_INTRO ? "intro" : "used");
-}
-
-sub pp_gv {
- my $op = shift;
- my $gv = $op->gv;
- $top = [$gv->STASH->NAME, "*", $gv->NAME];
- process($top, $op->private & OPpLVAL_INTRO ? "intro" : "used");
-}
-
-sub pp_const {
- my $op = shift;
- my $sv = $op->sv;
- $top = ["?", "",
- (class($sv) ne "SPECIAL" && $sv->FLAGS & SVf_POK) ? $sv->PV : "?"];
-}
-
-sub pp_method {
- my $op = shift;
- $top = ["(method)", "->".$top->[1], $top->[2]];
-}
-
-sub pp_entersub {
- my $op = shift;
- if ($top->[1] eq "m") {
- process($top, "meth");
- } else {
- process($top, "subused");
- }
- $top = UNKNOWN;
-}
-
-#
-# Stuff for cross referencing definitions of variables and subs
-#
-
-sub B::GV::xref {
- my $gv = shift;
- my $cv = $gv->CV;
- if ($$cv) {
- #return if $done{$$cv}++;
- $file = $gv->FILEGV->SV->PV;
- $line = $gv->LINE;
- process([$gv->STASH->NAME, "&", $gv->NAME], "subdef");
- push(@todo, $cv);
- }
- my $form = $gv->FORM;
- if ($$form) {
- return if $done{$$form}++;
- $file = $gv->FILEGV->SV->PV;
- $line = $gv->LINE;
- process([$gv->STASH->NAME, "", $gv->NAME], "formdef");
- }
-}
-
-sub xref_definitions {
- my ($pack, %exclude);
- return if $nodefs;
- $subname = "(definitions)";
- foreach $pack (qw(B O AutoLoader DynaLoader Config DB VMS
- strict vars FileHandle Exporter Carp)) {
- $exclude{$pack."::"} = 1;
- }
- no strict qw(vars refs);
- walksymtable(\%{"main::"}, "xref", sub { !defined($exclude{$_[0]}) });
-}
-
-sub output {
- return if $raw;
- my ($file, $subname, $pack, $name, $ev, $perfile, $persubname,
- $perpack, $pername, $perev);
- foreach $file (sort(keys(%table))) {
- $perfile = $table{$file};
- print "File $file\n";
- foreach $subname (sort(keys(%$perfile))) {
- $persubname = $perfile->{$subname};
- print " Subroutine $subname\n";
- foreach $pack (sort(keys(%$persubname))) {
- $perpack = $persubname->{$pack};
- print " Package $pack\n";
- foreach $name (sort(keys(%$perpack))) {
- $pername = $perpack->{$name};
- my @lines;
- foreach $ev (qw(intro formdef subdef meth subused used)) {
- $perev = $pername->{$ev};
- if (defined($perev) && @$perev) {
- my $code = $code{$ev};
- push(@lines, map("$code$_", @$perev));
- }
- }
- printf " %-16s %s\n", $name, join(", ", @lines);
- }
- }
- }
- }
-}
-
-sub compile {
- my @options = @_;
- my ($option, $opt, $arg);
- OPTION:
- while ($option = shift @options) {
- if ($option =~ /^-(.)(.*)/) {
- $opt = $1;
- $arg = $2;
- } else {
- unshift @options, $option;
- last OPTION;
- }
- if ($opt eq "-" && $arg eq "-") {
- shift @options;
- last OPTION;
- } elsif ($opt eq "o") {
- $arg ||= shift @options;
- open(STDOUT, ">$arg") or return "$arg: $!\n";
- } elsif ($opt eq "d") {
- $nodefs = 1;
- } elsif ($opt eq "r") {
- $raw = 1;
- } elsif ($opt eq "D") {
- $arg ||= shift @options;
- foreach $arg (split(//, $arg)) {
- if ($arg eq "o") {
- B->debug(1);
- } elsif ($arg eq "O") {
- $debug_op = 1;
- } elsif ($arg eq "t") {
- $debug_top = 1;
- }
- }
- }
- }
- if (@options) {
- return sub {
- my $objname;
- xref_definitions();
- foreach $objname (@options) {
- $objname = "main::$objname" unless $objname =~ /::/;
- eval "xref_object(\\&$objname)";
- die "xref_object(\\&$objname) failed: $@" if $@;
- }
- output();
- }
- } else {
- return sub {
- xref_definitions();
- xref_main();
- output();
- }
- }
-}
-
-1;
+++ /dev/null
-use B::Assembler qw(assemble_fh);
-use FileHandle;
-
-my ($filename, $fh, $out);
-
-if ($ARGV[0] eq "-d") {
- B::Assembler::debug(1);
- shift;
-}
-
-$out = \*STDOUT;
-
-if (@ARGV == 0) {
- $fh = \*STDIN;
- $filename = "-";
-} elsif (@ARGV == 1) {
- $filename = $ARGV[0];
- $fh = new FileHandle "<$filename";
-} elsif (@ARGV == 2) {
- $filename = $ARGV[0];
- $fh = new FileHandle "<$filename";
- $out = new FileHandle ">$ARGV[1]";
-} else {
- die "Usage: assemble [filename] [outfilename]\n";
-}
-
-binmode $out;
-$SIG{__WARN__} = sub { warn "$filename:@_" };
-$SIG{__DIE__} = sub { die "$filename: @_" };
-assemble_fh($fh, sub { print $out @_ });
+++ /dev/null
-use Config;
-
-$libdir = $ENV{PERL_SRC} || "$Config{installarchlib}/CORE";
-
-if (!grep(/^-[cS]$/, @ARGV)) {
- $linkargs = sprintf("%s $libdir/$Config{libperl} %s",
- @Config{qw(ldflags libs)});
-}
-
-$cccmd = "$Config{cc} $Config{ccflags} -I$libdir @ARGV $linkargs";
-print "$cccmd\n";
-exec $cccmd;
+++ /dev/null
-use B::Disassembler qw(disassemble_fh);
-use FileHandle;
-
-my $fh;
-if (@ARGV == 0) {
- $fh = \*STDIN;
-} elsif (@ARGV == 1) {
- $fh = new FileHandle "<$ARGV[0]";
-} else {
- die "Usage: disassemble [filename]\n";
-}
-
-sub print_insn {
- my ($insn, $arg) = @_;
- if (defined($arg)) {
- printf "%s %s\n", $insn, $arg;
- } else {
- print $insn, "\n";
- }
-}
-
-disassemble_fh($fh, \&print_insn);
+++ /dev/null
-use File::Find;
-use Config;
-
-if (@ARGV != 2) {
- warn <<"EOT";
-Usage: makeliblinks libautodir targetdir
-where libautodir is the architecture-dependent auto directory
-(e.g. $Config::Config{archlib}/auto).
-EOT
- exit 2;
-}
-
-my ($libautodir, $targetdir) = @ARGV;
-
-# Calculate relative path prefix from $targetdir to $libautodir
-sub relprefix {
- my ($to, $from) = @_;
- my $up;
- for ($up = 0; substr($to, 0, length($from)) ne $from; $up++) {
- $from =~ s(
- [^/]+ (?# a group of non-slashes)
- /* (?# maybe with some trailing slashes)
- $ (?# at the end of the path)
- )()x;
- }
- return (("../" x $up) . substr($to, length($from)));
-}
-
-my $relprefix = relprefix($libautodir, $targetdir);
-
-my ($dlext, $lib_ext) = @Config::Config{qw(dlext lib_ext)};
-
-sub link_if_library {
- if (/\.($dlext|$lib_ext)$/o) {
- my $ext = $1;
- my $name = $File::Find::name;
- if (substr($name, 0, length($libautodir) + 1) ne "$libautodir/") {
- die "directory of $name doesn't match $libautodir\n";
- }
- substr($name, 0, length($libautodir) + 1) = '';
- my @parts = split(m(/), $name);
- if ($parts[-1] ne "$parts[-2].$ext") {
- die "module name $_ doesn't match its directory $libautodir\n";
- }
- pop @parts;
- my $libpath = "$targetdir/lib" . join("__", @parts) . ".$ext";
- print "$libpath -> $relprefix/$name\n";
- symlink("$relprefix/$name", $libpath)
- or warn "above link failed with error: $!\n";
- }
-}
-
-find(\&link_if_library, $libautodir);
-exit 0;
+++ /dev/null
-package O;
-use B qw(minus_c);
-use Carp;
-
-sub import {
- my ($class, $backend, @options) = @_;
- eval "use B::$backend ()";
- if ($@) {
- croak "use of backend $backend failed: $@";
- }
- my $compilesub = &{"B::${backend}::compile"}(@options);
- if (ref($compilesub) eq "CODE") {
- minus_c;
- eval 'END { &$compilesub() }';
- } else {
- die $compilesub;
- }
-}
-
-1;
-
projects / platform / upstream / perl.git / commitdiff