/
C.pm
6842 lines (6279 loc) · 228 KB
/
C.pm
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# C.pm
#
# Copyright (c) 1996, 1997, 1998 Malcolm Beattie
# Copyright (c) 2008, 2009, 2010, 2011 Reini Urban
# Copyright (c) 2010 Nick Koston
# Copyright (c) 2011, 2012 cPanel Inc
#
# 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 strict;
our $VERSION = '1.43';
my %debug;
our $check;
my $eval_pvs = '';
package B::C::Section;
use strict;
use B ();
use base 'B::Section';
sub new {
my $class = shift;
my $o = $class->SUPER::new(@_);
push @$o, { values => [] };
return $o;
}
sub add {
my $section = shift;
push( @{ $section->[-1]{values} }, @_ );
}
sub remove {
my $section = shift;
pop @{ $section->[-1]{values} };
}
sub index {
my $section = shift;
return scalar( @{ $section->[-1]{values} } ) - 1;
}
sub comment {
my $section = shift;
$section->[-1]{comment} = join( "", @_ ) if @_;
$section->[-1]{comment};
}
# add debugging info - stringified flags on -DF
sub debug {
my $section = shift;
my $dbg = join( " ", @_ );
$section->[-1]{dbg}->[ $section->index ] = $dbg if $dbg;
}
sub output {
my ( $section, $fh, $format ) = @_;
my $sym = $section->symtable || {};
my $default = $section->default;
return if $B::C::check;
my $i = 0;
my $dodbg = 1 if $debug{flags} and $section->[-1]{dbg};
foreach ( @{ $section->[-1]{values} } ) {
my $dbg = "";
my $ref = "";
if (m/(s\\_[0-9a-f]+)/) {
if (!exists($sym->{$1}) and $1 ne 's\_0') {
$ref = $1;
$B::C::unresolved_count++;
warn "Warning: unresolved ".$section->name." symbol $ref\n" if $B::C::verbose;
}
}
s{(s\\_[0-9a-f]+)}{ exists($sym->{$1}) ? $sym->{$1} : $default; }ge;
if ($dodbg and $section->[-1]{dbg}->[$i]) {
$dbg = " /* ".$section->[-1]{dbg}->[$i]." ".$ref." */";
}
printf $fh $format, $_, $section->name, $i, $ref, $dbg;
++$i;
}
}
package B::C::InitSection;
use strict;
# avoid use vars
@B::C::InitSection::ISA = qw(B::C::Section);
sub new {
my $class = shift;
my $max_lines = 10000; #pop;
my $section = $class->SUPER::new(@_);
$section->[-1]{evals} = [];
$section->[-1]{initav} = [];
$section->[-1]{chunks} = [];
$section->[-1]{nosplit} = 0;
$section->[-1]{current} = [];
$section->[-1]{count} = 0;
$section->[-1]{max_lines} = $max_lines;
return $section;
}
sub split {
my $section = shift;
$section->[-1]{nosplit}--
if $section->[-1]{nosplit} > 0;
}
sub no_split {
shift->[-1]{nosplit}++;
}
sub inc_count {
my $section = shift;
$section->[-1]{count} += $_[0];
# this is cheating
$section->add();
}
sub add {
my $section = shift->[-1];
my $current = $section->{current};
my $nosplit = $section->{nosplit};
push @$current, @_;
$section->{count} += scalar(@_);
if ( !$nosplit && $section->{count} >= $section->{max_lines} ) {
push @{ $section->{chunks} }, $current;
$section->{current} = [];
$section->{count} = 0;
}
}
sub add_eval {
my $section = shift;
my @strings = @_;
foreach my $i (@strings) {
$i =~ s/\"/\\\"/g;
}
push @{ $section->[-1]{evals} }, @strings;
}
sub add_initav {
my $section = shift;
push @{ $section->[-1]{initav} }, @_;
}
sub output {
my ( $section, $fh, $format, $init_name ) = @_;
my $sym = $section->symtable || {};
my $default = $section->default;
return if $B::C::check;
push @{ $section->[-1]{chunks} }, $section->[-1]{current};
my $name = "aaaa";
foreach my $i ( @{ $section->[-1]{chunks} } ) {
# dTARG and dSP unused -nt
print $fh <<"EOT";
static int ${init_name}_${name}(pTHX)
{
EOT
foreach my $i ( @{ $section->[-1]{initav} } ) {
print $fh "\t",$i,"\n";
}
foreach my $j (@$i) {
$j =~ s{(s\\_[0-9a-f]+)}
{ exists($sym->{$1}) ? $sym->{$1} : $default; }ge;
print $fh "\t$j\n";
}
print $fh "\treturn 0;\n}\n";
$section->SUPER::add("${init_name}_${name}(aTHX);");
++$name;
}
$section->SUPER::add("perl_init2(aTHX);") unless $init_name eq 'perl_init2';
# We need to output evals after dl_init.
foreach my $s ( @{ $section->[-1]{evals} } ) {
${B::C::eval_pvs} .= " eval_pv(\"$s\",1);\n";
}
print $fh "static int ${init_name}(pTHX)
{";
$section->SUPER::output( $fh, $format );
print $fh "\treturn 0;\n}\n";
}
package B::C;
use strict;
use Exporter ();
use Errno (); #needed since 5.14
our %Regexp;
{ # block necessary for caller to work
my $caller = caller;
if ( $caller eq 'O' or $caller eq 'Od' ) {
require XSLoader;
XSLoader::load('B::C'); # for r-magic only
}
}
our @ISA = qw(Exporter);
our @EXPORT_OK =
qw( output_all output_boilerplate output_main output_main_rest mark_unused mark_skip
init_sections set_callback save_unused_subs objsym save_context fixup_ppaddr
save_sig svop_pv inc_cleanup ivx nvx );
# for 5.6 better use the native B::C
# 5.6.2 works fine though.
use B
qw( minus_c sv_undef walkoptree walkoptree_slow walksymtable main_root main_start peekop
class cchar svref_2object compile_stats comppadlist hash
threadsv_names main_cv init_av end_av opnumber cstring
HEf_SVKEY SVf_POK SVf_ROK SVf_IOK SVf_NOK SVf_IVisUV SVf_READONLY );
BEGIN {
if ($] >= 5.008) {
@B::NV::ISA = 'B::IV'; # add IVX to nv. This fixes test 23 for Perl 5.8
B->import(qw(regex_padav SVp_NOK SVp_IOK CVf_CONST CVf_ANON)); # both unsupported for 5.6
} else {
eval q[
sub SVp_NOK() {0}; # unused
sub SVp_IOK() {0};
sub CVf_ANON() {4};
];
@B::PVMG::ISA = qw(B::PVNV B::RV);
}
if ($] >= 5.010) {
require mro; mro->import;
sub SVf_OOK() { 0x02000000 }; # not exported
}
}
use B::Asmdata qw(@specialsv_name);
use B::C::Flags;
use FileHandle;
use Config;
my $hv_index = 0;
my $gv_index = 0;
my $re_index = 0;
my $pv_index = 0;
my $cv_index = 0;
my $hek_index = 0;
my $anonsub_index = 0;
my $initsub_index = 0;
my $padlist_index = 0;
# exclude all not B::C:: prefixed subs
my %all_bc_subs = map { $_ => 1 }
qw(B::AV::save B::BINOP::save B::BM::save
B::COP::save B::CV::save B::FAKEOP::fake_ppaddr B::FAKEOP::flags
B::FAKEOP::new B::FAKEOP::next B::FAKEOP::ppaddr B::FAKEOP::private
B::FAKEOP::save B::FAKEOP::sibling B::FAKEOP::targ B::FAKEOP::type
B::GV::save B::GV::savecv B::HV::save B::IO::save B::IO::save_data
B::IV::save B::LISTOP::save B::LOGOP::save B::LOOP::save B::NULL::save
B::NV::save B::OBJECT::save B::OP::_save_common B::OP::fake_ppaddr
B::OP::isa B::OP::save B::PADLIST::save B::PADOP::save B::PMOP::save B::PV::save
B::PVIV::save B::PVLV::save B::PVMG::save B::PVMG::save_magic
B::PVNV::save B::PVOP::save B::REGEXP::save B::RV::save B::SPECIAL::save
B::SPECIAL::savecv B::SV::save B::SVOP::save B::UNOP::save B::UV::save
B::REGEXP::EXTFLAGS
);
# Track all internally used packages. All others may not be deleted automatically
# - hidden methods. -fdelete-pkg
my %all_bc_pkg = map { $_ => 1 }
qw(B B::AV B::BINOP B::BM B::COP B::CV B::FAKEOP
B::GV B::HV B::IO B::IV B::LISTOP B::LOGOP B::LOOP B::NULL B::NV
B::OBJECT B::OP B::PADOP B::PMOP B::PV B::PVIV B::PVLV B::PVMG B::PVNV
B::PVOP B::REGEXP B::RV B::SPECIAL B::SV B::SVOP B::UNOP B::UV
AnyDBM_File Fcntl Regexp overload Errno Exporter Exporter::Heavy Config
warnings warnings::register DB next maybe maybe::next FileHandle fields
AutoLoader Carp Symbol PerlIO PerlIO::scalar SelectSaver ExtUtils
ExtUtils::Constant ExtUtils::Constant::ProxySubs threads base IO::File
IO::Seekable IO::Handle IO DynaLoader XSLoader O
);
# Note: BEGIN-time sideffect-only packages like strict, vars or constant even
# without functions should not be deleted, so they are not listed here.
# Keep: vars strict constant
if (exists $INC{'blib.pm'}) { # http://blogs.perl.org/users/rurban/2012/02/the-unexpected-case-of--mblib.html
for (qw(Cwd File File::Spec File::Spec::Unix Dos EPOC blib Scalar
Scalar::Util VMS VMS::Filespec VMS::Feature Win32)) {
$all_bc_pkg{$_} = 1;
}
}
# B::C stash footprint: mainly caused by blib, warnings, and Carp loaded with DynaLoader
# perl5.15.7d-nt -MO=C,-o/dev/null -MO=Stash -e0
# -umain,-ure,-umro,-ustrict,-uAnyDBM_File,-uFcntl,-uRegexp,-uoverload,-uErrno,-uExporter,-uExporter::Heavy,-uConfig,-uwarnings,-uwarnings::register,-uDB,-unext,-umaybe,-umaybe::next,-uFileHandle,-ufields,-uvars,-uAutoLoader,-uCarp,-uSymbol,-uPerlIO,-uPerlIO::scalar,-uSelectSaver,-uExtUtils,-uExtUtils::Constant,-uExtUtils::Constant::ProxySubs,-uthreads,-ubase
# perl5.15.7d-nt -MErrno -MO=Stash -e0
# -umain,-ure,-umro,-ustrict,-uRegexp,-uoverload,-uErrno,-uExporter,-uExporter::Heavy,-uwarnings,-uwarnings::register,-uConfig,-uDB,-uvars,-uCarp,-uPerlIO,-uthreads
# perl5.15.7d-nt -Mblib -MO=Stash -e0
# -umain,-ure,-umro,-ustrict,-uCwd,-uRegexp,-uoverload,-uFile,-uFile::Spec,-uFile::Spec::Unix,-uDos,-uExporter,-uExporter::Heavy,-uConfig,-uwarnings,-uwarnings::register,-uDB,-uEPOC,-ublib,-uScalar,-uScalar::Util,-uvars,-uCarp,-uVMS,-uVMS::Filespec,-uVMS::Feature,-uWin32,-uPerlIO,-uthreads
# perl -MO=Stash -e0
# -umain,-uTie,-uTie::Hash,-ure,-umro,-ustrict,-uRegexp,-uoverload,-uExporter,-uExporter::Heavy,-uwarnings,-uDB,-uCarp,-uPerlIO,-uthreads
# pb -MB::Stash -e0
# -umain,-ure,-umro,-uRegexp,-uPerlIO,-uExporter,-uDB
my ($package_pv, @package_pv); # global stash for methods since 5.13
my (%symtable, %cvforward, %lexwarnsym);
my (%strtable, %hektable, @static_free, %newpkg);
my %xsub;
my ($warn_undefined_syms, $method_named_warn);
my ($staticxs, $outfile);
my (%include_package, %skip_package, %saved, %isa_cache, %method_cache);
my %static_ext;
my ($use_xsloader);
my $nullop_count = 0;
my $unresolved_count = 0;
# options and optimizations shared with B::CC
our ($curcv, $module, $init_name, %savINC, $mainfile);
our ($use_av_undef_speedup, $use_svpop_speedup) = (1, 1);
our ($pv_copy_on_grow, $optimize_ppaddr, $optimize_warn_sv, $use_perl_script_name,
$save_data_fh, $save_sig, $optimize_cop, $av_init, $av_init2, $ro_inc, $destruct,
$fold, $warnings, $const_strings, $stash, $can_delete_pkg, $walkall);
our $verbose = 0;
our %option_map = (
'cog' => \$B::C::pv_copy_on_grow,
'const-strings' => \$B::C::const_strings,
'save-data' => \$B::C::save_data_fh,
'ppaddr' => \$B::C::optimize_ppaddr,
'warn-sv' => \$B::C::optimize_warn_sv,
'av-init' => \$B::C::av_init,
'av-init2' => \$B::C::av_init2,
'ro-inc' => \$B::C::ro_inc,
'delete-pkg' => \$B::C::can_delete_pkg,
'walkall' => \$B::C::walkall,
'stash' => \$B::C::stash, # disable with -fno-stash
'destruct' => \$B::C::destruct, # disable with -fno-destruct
'fold' => \$B::C::fold, # disable with -fno-fold
'warnings' => \$B::C::warnings, # disable with -fno-warnings
'use-script-name' => \$use_perl_script_name,
'save-sig-hash' => \$B::C::save_sig,
'cop' => \$optimize_cop, # XXX very unsafe!
# Better do it in CC, but get rid of
# NULL cops also there.
);
our %debug_map = (
'O' => 'op',
'A' => 'av',
'H' => 'hv',
'C' => 'cv',
'M' => 'mg',
'R' => 'rx',
'G' => 'gv',
'S' => 'sv',
'w' => 'walk',
'c' => 'cops',
's' => 'sub',
'p' => 'pkg',
'm' => 'meth',
'u' => 'unused',
);
my @xpvav_sizes;
my ($max_string_len, $in_endav);
my %static_core_pkg; # = map {$_ => 1} static_core_packages();
my $MULTI = $Config{usemultiplicity};
my $ITHREADS = $Config{useithreads};
my $DEBUGGING = ($Config{ccflags} =~ m/-DDEBUGGING/);
my $PERL514 = ( $] >= 5.013002 );
my $PERL512 = ( $] >= 5.011 );
my $PERL510 = ( $] >= 5.009005 );
my $PERL56 = ( $] < 5.008001 ); # yes. 5.8.0 is a 5.6.x
# Thanks to Mattia Barbon for the C99 tip to init any union members
my $C99 = $Config{d_c99_variadic_macros}; # http://docs.sun.com/source/819-3688/c99.app.html#pgfId-1003962
my $MAD = $Config{mad};
my $MYMALLOC = $Config{usemymalloc} eq 'define';
my @threadsv_names;
BEGIN {
@threadsv_names = threadsv_names();
}
# This the Carp free workaround for DynaLoader::bootstrap
sub DynaLoader::croak {die @_}
# 5.15.3 workaround [perl #101336], without .bs support
# XSLoader::load_file($module, $modlibname, ...)
sub XSLoader::load_file {
#package DynaLoader;
use Config ();
my $module = shift or die "missing module name";
my $modlibname = shift or die "missing module filepath";
print STDOUT "XSLoader::load_file(\"$module\", \"$modlibname\" @_)\n"
if ${DynaLoader::dl_debug};
push @_, $module;
#if (my $ver = ${$module."::VERSION"}) {
# # XXX Ensure that there is no v-magic attached,. Else xs_version_bootcheck will fail.
# push @_, $ver;
#}
# works with static linking too
my $boots = "$module\::bootstrap";
goto &$boots if defined &$boots;
my @modparts = split(/::/,$module); # crashes threaded, issue 100
my $modfname = $modparts[-1];
my $modpname = join('/',@modparts);
my $c = @modparts;
$modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&D basename
die "missing module filepath" unless $modlibname;
die "missing dlext" unless $Config::Config{dlext};
my $file = "$modlibname/auto/$modpname/$modfname.".$Config::Config{dlext};
# skip the .bs "bullshit" part, needed for some old solaris ages ago
goto \&DynaLoader::bootstrap_inherit if not -f $file;
my $bootname = "boot_$module";
$bootname =~ s/\W/_/g;
@DynaLoader::dl_require_symbols = ($bootname);
my $boot_symbol_ref;
if ($boot_symbol_ref = DynaLoader::dl_find_symbol(0, $bootname)) {
goto boot; #extension library has already been loaded, e.g. darwin
}
# Many dynamic extension loading problems will appear to come from
# this section of code: XYZ failed at line 123 of DynaLoader.pm.
# Often these errors are actually occurring in the initialisation
# C code of the extension XS file. Perl reports the error as being
# in this perl code simply because this was the last perl code
# it executed.
my $libref = DynaLoader::dl_load_file($file, 0) or do {
die("Can't load '$file' for module $module: " . DynaLoader::dl_error());
};
push(@DynaLoader::dl_librefs, $libref); # record loaded object
my @unresolved = DynaLoader::dl_undef_symbols();
if (@unresolved) {
die("Undefined symbols present after loading $file: @unresolved\n");
}
$boot_symbol_ref = DynaLoader::dl_find_symbol($libref, $bootname) or do {
die("Can't find '$bootname' symbol in $file\n");
};
push(@DynaLoader::dl_modules, $module); # record loaded module
boot:
my $xs = DynaLoader::dl_install_xsub($boots, $boot_symbol_ref, $file);
# See comment block above
push(@DynaLoader::dl_shared_objects, $file); # record files loaded
return &$xs(@_);
}
# Code sections
my (
$init, $decl, $symsect, $binopsect, $condopsect,
$copsect, $padopsect, $listopsect, $logopsect, $loopsect,
$opsect, $pmopsect, $pvopsect, $svopsect, $unopsect,
$svsect, $xpvsect, $xpvavsect, $xpvhvsect, $xpvcvsect,
$xpvivsect, $xpvuvsect, $xpvnvsect, $xpvmgsect, $xpvlvsect,
$xrvsect, $xpvbmsect, $xpviosect, $heksect, $free,
$padlistsect, $init2
);
my @op_sections = \(
$binopsect, $condopsect, $copsect, $padopsect,
$listopsect, $logopsect, $loopsect, $opsect,
$pmopsect, $pvopsect, $svopsect, $unopsect
);
sub walk_and_save_optree;
my $saveoptree_callback = \&walk_and_save_optree;
sub set_callback { $saveoptree_callback = shift }
sub saveoptree { &$saveoptree_callback(@_) }
sub save_main_rest;
sub verbose { if (@_) { $verbose = shift; } else { $verbose; } }
sub module { if (@_) { $module = shift; } else { $module; } }
sub walk_and_save_optree {
my ( $name, $root, $start ) = @_;
if ($root) {
$verbose ? walkoptree_slow( $root, "save" ) : walkoptree( $root, "save" );
}
return objsym($start);
}
# Look this up here so we can do just a number compare
# rather than looking up the name of every BASEOP in B::OP
my $OP_THREADSV = opnumber('threadsv');
my $OP_DBMOPEN = opnumber('dbmopen');
# special handling for nullified COP's.
my %OP_COP = ( opnumber('nextstate') => 1 );
$OP_COP{ opnumber('setstate') } = 1 if $] > 5.005003 and $] < 5.005062;
$OP_COP{ opnumber('dbstate') } = 1 unless $PERL512;
warn %OP_COP if $debug{cops};
# scalar: pv. list: (stash,pv,sv)
# pads are not named, but may be typed
sub padop_name {
my $op = shift;
my $cv = shift;
if ($op->can('name')
and ($op->name eq 'padsv' or $op->name eq 'method_named'
or ref($op) eq 'B::SVOP')) #threaded
{
return () if $cv and ref($cv->PADLIST) eq 'B::SPECIAL';
my @c = ($cv and ref($cv) eq 'B::CV' and ref($cv->PADLIST) ne 'B::NULL')
? $cv->PADLIST->ARRAY : comppadlist->ARRAY;
my @pad = $c[1]->ARRAY;
my @types = $c[0]->ARRAY;
my $ix = $op->can('padix') ? $op->padix : $op->targ;
my $sv = $pad[$ix];
my $t = $types[$ix];
if (defined($t) and ref($t) ne 'B::SPECIAL') {
my $pv = $sv->can("PV") ? $sv->PV : ($t->can('PVX') ? $t->PVX : '');
# need to fix B for SVpad_TYPEDI without formal STASH
my $stash = (ref($t) eq 'B::PVMG' and ref($t->SvSTASH) ne 'B::SPECIAL') ? $t->SvSTASH->NAME : '';
return wantarray ? ($stash,$pv,$sv) : $pv;
} elsif ($sv) {
my $pv = $sv->PV if $sv->can("PV");
my $stash = $sv->STASH->NAME if $sv->can("STASH");
return wantarray ? ($stash,$pv,$sv) : $pv;
}
}
}
sub svop_name {
my $op = shift;
my $cv = shift;
my $sv;
if ($op->can('name') and $op->name eq 'padsv') {
my @r = padop_name($op, $cv);
return wantarray ? @r : ($r[1] ? $r[1] : $r[0]);
} else {
if (!$op->can("sv")) {
if (ref($op) eq 'B::PMOP' and $op->pmreplroot->can("sv")) {
$sv = $op->pmreplroot->sv;
} else {
$sv = $op->first->sv unless $op->flags & 4
or ($op->name eq 'const' and $op->flags & 34) or $op->first->can("sv");
}
} else {
$sv = $op->sv;
}
if ($sv and $$sv) {
if ($sv->FLAGS & SVf_ROK) {
return '' if $sv->isa("B::NULL");
my $rv = $sv->RV;
if ($rv->isa("B::PVGV")) {
my $o = $rv->IO;
return $o->STASH->NAME if $$o;
}
return '' if $rv->isa("B::PVMG");
return $rv->STASH->NAME;
} else {
if ($op->name eq 'gvsv') {
return wantarray ? ($sv->STASH->NAME, $sv->NAME) : $sv->STASH->NAME.'::'.$sv->NAME;
} elsif ($op->name eq 'gv') {
return wantarray ? ($sv->STASH->NAME, $sv->NAME) : $sv->STASH->NAME.'::'.$sv->NAME;
} else {
return $sv->can('STASH') ? $sv->STASH->NAME
: $sv->can('NAME') ? $sv->NAME : $sv->PV;
}
}
}
}
}
# Returns a SVOP->pv (const PV or method_named PV mostly). for the symbol and stash name see svop_name
# 1. called from check_entersub/method_named to get the pv
# 2. called from svop before method/method_named to cache the $package_pv
sub svop_pv {
my $op = shift;
my $cv = shift;
my $sv;
if (!$op->can("sv")) {
if ($op->can('name') and $op->name eq 'padsv') {
my $pv = padop_name($op, $cv);
return $pv;
}
if (ref($op) eq 'B::PMOP' and $op->pmreplroot->can("sv")) {
$sv = $op->pmreplroot->sv;
} else {
if ($op->flags & 4 # OPf_KIDS
and !($op->name eq 'const' and $op->flags & 64) # !OPpCONST_BARE
and $op->first->can("sv")) {
$sv = $op->first->sv;
}
}
} else {
$sv = $op->sv;
}
if ($sv and $$sv) {
return $sv->PV if $sv->can("PV");
} else { # threaded
my $pv = padop_name($op, $cv);
return $pv;
}
}
# get or set package name for a variable, defined by
# $obj = bless {}, "Package"; or
# $obj = new Package; resp. $obj = Package->new;
# obj can be a padsv or gvsv
sub cache_svop_pkg {
my $svop = shift;
my $sv;
if ($svop->name eq 'padsv') {
my @c = comppadlist->ARRAY;
my @pad = $c[1]->ARRAY;
my $ix = $svop->can('padix') ? $svop->padix : $svop->targ;
$sv = $pad[$ix];
} elsif ($svop->name eq 'gvsv') {
$sv = $svop->sv;
} elsif ($svop->name eq 'gv') {
$sv = $svop->gv;
}
if ($sv and $$sv) {
if (@_) { # set
$newpkg{$$sv} = shift;
} else { # get
return $newpkg{$$sv};
}
}
}
sub savesym {
my ( $obj, $value ) = @_;
my $sym = sprintf( "s\\_%x", $$obj );
$symtable{$sym} = $value;
return $value;
}
sub objsym {
my $obj = shift;
return $symtable{ sprintf( "s\\_%x", $$obj ) };
}
sub getsym {
my $sym = shift;
my $value;
return 0 if $sym eq "sym_0"; # special case
if ( exists $symtable{$sym} ) {
return $symtable{$sym};
}
else {
warn "warning: undefined symbol $sym\n" if $warn_undefined_syms;
return "UNUSED";
}
}
sub delsym {
my ( $obj ) = @_;
my $sym = sprintf( "s\\_%x", $$obj );
delete $symtable{$sym};
}
sub savere {
my $re = shift;
my $flags = shift || 0;
my $sym;
my $pv = $re;
my $cur = length $pv;
my $len = 0; # length( pack "a*", $pv ) + 1;
if ($PERL514) {
$xpvsect->add( sprintf( "Nullhv, {0}, %u, %u", $cur, $len ) );
$svsect->add( sprintf( "&xpv_list[%d], 1, %x, {(char*)%s}", $xpvsect->index,
0x4405, savepv($pv) ) );
$sym = sprintf( "&sv_list[%d]", $svsect->index );
}
elsif ($PERL510) {
# BUG! Should be the same as newSVpvn($resym, $relen) but is not
my $s1 = ($PERL514 ? "NULL," : "") . "{0}, %u, %u";
$xpvsect->add( sprintf( $s1, $cur, $len ) );
$svsect->add( sprintf( "&xpv_list[%d], 1, %x, {(char*)%s}", $xpvsect->index,
0x4405, savepv($pv) ) );
my $s = "sv_list[".$svsect->index."]";
$sym = "&$s";
push @static_free, $s if $len and $B::C::pv_copy_on_grow;
}
else {
$sym = sprintf( "re%d", $re_index++ );
$decl->add( sprintf( "Static const char *$sym = %s;", cstring($re) ) );
}
return ( $sym, length( pack "a*", $re ) );
}
sub constpv {
my $pv = pack "a*", shift;
if (exists $strtable{$pv}) {
return $strtable{$pv};
}
my $pvsym = sprintf( "pv%d", $pv_index++ );
$strtable{$pv} = "$pvsym";
my $const = ($B::C::pv_copy_on_grow and $B::C::const_strings) ? " const" : "";
if ( defined $max_string_len && length($pv) > $max_string_len ) {
my $chars = join ', ', map { cchar $_ } split //, $pv;
$decl->add( sprintf( "Static$const char %s[] = { %s };", $pvsym, $chars ) );
} else {
my $cstring = cstring($pv);
if ( $cstring ne "0" ) { # sic
$decl->add( sprintf( "Static$const char %s[] = %s;", $pvsym, $cstring ) );
}
}
return wantarray ? ( $pvsym, length( pack "a*", $pv ) ) : $pvsym;
}
sub savepv {
return constpv($_[0]) if $B::C::const_strings and $B::C::pv_copy_on_grow; # or readonly
my $pv = pack "a*", shift;
my $pvsym = sprintf( "pv%d", $pv_index++ );
if ( defined $max_string_len && length($pv) > $max_string_len ) {
my $chars = join ', ', map { cchar $_ } split //, $pv;
$decl->add( sprintf( "Static char %s[] = { %s };", $pvsym, $chars ) );
} else {
my $cstring = cstring($pv);
if ( $cstring ne "0" ) { # sic
$decl->add( sprintf( "Static char %s[] = %s;", $pvsym, $cstring ) );
}
}
my $len = length( pack "a*", $pv ) + 1;
return ( $pvsym, $len );
}
sub save_rv {
my ($sv, $fullname) = @_;
if (!$fullname) {
$fullname = '(unknown)';
}
# confess "Can't save RV: not ROK" unless $sv->FLAGS & SVf_ROK;
# 5.6: Can't locate object method "RV" via package "B::PVMG"
my $rv = $sv->RV->save($fullname);
$rv =~ s/^\(([AGHS]V|IO)\s*\*\)\s*(\&sv_list.*)$/$2/;
return $rv;
}
# => savesym, cur, len, pv
sub save_pv_or_rv {
my ($sv, $fullname) = @_;
my $rok = $sv->FLAGS & SVf_ROK;
my $pok = $sv->FLAGS & SVf_POK;
my ( $cur, $len, $savesym, $pv ) = ( 0, 0 );
# overloaded VERSION symbols fail to xs boot: ExtUtils::CBuilder with Fcntl::VERSION (i91)
# 5.6: Can't locate object method "RV" via package "B::PV" Carp::Clan
if ($rok and !$PERL56) {
# this returns us a SV*. 5.8 expects a char* in xpvmg.xpv_pv
warn "save_pv_or_rv: save_rv(",$sv,")\n" if $debug{sv};
$savesym = ($PERL510 ? "" : "(char*)") . save_rv($sv, $fullname);
}
else {
$pv = $pok ? ( pack "a*", $sv->PV ) : undef;
$cur = $pok ? length($pv) : 0;
my $shared_hek = $PERL510 ? (($sv->FLAGS & 0x09000000) == 0x09000000) : undef;
local $B::C::pv_copy_on_grow if $shared_hek;
if ($pok) {
if ($B::C::pv_copy_on_grow) {
( $savesym, $len ) = ($B::C::const_strings and $sv->FLAGS & SVf_READONLY)
? constpv($pv) : savepv($pv);
} else {
( $savesym, $len ) = ( 'ptr_undef', $cur+1 );
}
} else {
( $savesym, $len ) = ( 'ptr_undef', 0 );
}
}
return ( $savesym, $cur, $len, $pv );
}
# Shared global string in PL_strtab.
# Mostly GvNAME and GvFILE, but also CV prototypes or bareword hash keys.
sub save_hek {
my $str = shift; # not cstring'ed
my $len = length $str;
# force empty string for CV prototypes
if (!$len and !@_) { wantarray ? return ( "NULL", 0 ) : return "NULL"; }
if (exists $hektable{$str}) {
return wantarray ? ($hektable{$str}, length( pack "a*", $hektable{$str} ))
: $hektable{$str};
}
my $cur = length( pack "a*", $str );
my $sym = sprintf( "hek%d", $hek_index++ );
$hektable{$str} = $sym;
my $cstr = cstring($str);
$decl->add(sprintf("Static HEK *%s;",$sym));
# randomized global shared hash keys:
# share_hek needs a non-zero hash parameter, unlike hv_store.
# Vulnerable to oCERT-2011-003 style DOS attacks?
# user-input (object fields) does not affect strtab, it is pretty safe.
# But we need to randomize them to avoid run-time conflicts
# e.g. "Prototype mismatch: sub bytes::length (_) vs (_)"
$init->add(sprintf("%s = share_hek(%s, %u, %s);",
$sym, $cstr, $cur, '0'));
wantarray ? ( $sym, $cur ) : $sym;
}
sub ivx ($) {
my $ivx = shift;
my $ivdformat = $Config{ivdformat};
$ivdformat =~ s/"//g; #" poor editor
my $intmax = (1 << ($Config{ivsize}*4-1)) - 1;
# LL if INT32_MAX .. INT64_MAX
# UL if > INT32_MAX = 2147483647
my $ll = $Config{d_longlong} ? "LL" : "UL";
my $sval = sprintf("%${ivdformat}%s", $ivx, $ivx > $intmax ? $ll : "");
if ($ivx < -$intmax) {
my $l = $Config{d_longlong} ? "LL" : "L";
$sval = sprintf("%${ivdformat}%s", $ivx, $l); # DateTime
}
$sval = '0' if $sval =~ /(NAN|inf)$/i;
return $sval;
#return $C99 ? ".xivu_uv = $sval" : $sval; # this is version dependent
}
# protect from warning: floating constant exceeds range of ‘double’ [-Woverflow]
sub nvx ($) {
my $nvx = shift;
my $nvgformat = $Config{nvgformat};
$nvgformat =~ s/"//g; #" poor editor
my $dblmax = "1.79769313486232e+308";
# my $ldblmax = "1.18973149535723176502e+4932L"
my $ll = $Config{d_longdbl} ? "LL" : "L";
if ($nvgformat eq 'g') { # a very poor choice to keep precision
# on intel 17-18, on ppc 31, on sparc64/s390 34
$nvgformat = $Config{uselongdouble} ? '.17Lg' : '.16g';
}
my $sval = sprintf("%${nvgformat}%s", $nvx, $nvx > $dblmax ? $ll : "");
if ($nvx < -$dblmax) {
$sval = sprintf("%${nvgformat}%s", $nvx, $ll);
}
$sval = '0' if $sval =~ /(NAN|inf)$/i;
$sval .= '.00' if $sval =~ /^-?\d+$/;
return $sval;
}
# See also init_op_ppaddr below; initializes the ppaddr to the
# OpTYPE; init_op_ppaddr iterates over the ops and sets
# op_ppaddr to PL_ppaddr[op_ppaddr]; this avoids an explicit assignment
# in perl_init ( ~10 bytes/op with GCC/i386 )
sub B::OP::fake_ppaddr {
return "NULL" unless $_[0]->can('name');
return $B::C::optimize_ppaddr
? sprintf( "INT2PTR(void*,OP_%s)", uc( $_[0]->name ) )
: ( $verbose ? sprintf( "/*OP_%s*/NULL", uc( $_[0]->name ) ) : "NULL" );
}
sub B::FAKEOP::fake_ppaddr { "NULL" }
# XXX HACK! duct-taping around compiler problems
sub B::OP::isa { UNIVERSAL::isa(@_) } # walkoptree_slow misses that
sub B::OP::can { UNIVERSAL::can(@_) }
sub B::OBJECT::name { "" } # B misses that
$isa_cache{'B::OBJECT::can'} = 'UNIVERSAL';
# This pair is needed because B::FAKEOP::save doesn't scalar dereference
# $op->next and $op->sibling
my $opsect_common =
"next, sibling, ppaddr, " . ( $MAD ? "madprop, " : "" ) . "targ, type, ";
{
# For 5.8:
# 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.
# For 5.9 the hard coded text is the values for op_opt and op_static in each
# op. The value of op_opt is irrelevant, and the value of op_static needs to
# be 1 to tell op_free that this is a statically defined op and that is
# shouldn't be freed.
# For 5.10 op_seq = -1 is gone, the temp. op_static also, but we
# have something better, we can set op_latefree to 1, which frees the children
# (e.g. savepvn), but not the static op.
# 5.8: U16 op_seq;
# 5.9.4: unsigned op_opt:1; unsigned op_static:1; unsigned op_spare:5;
# 5.10: unsigned op_opt:1; unsigned op_latefree:1; unsigned op_latefreed:1; unsigned op_attached:1; unsigned op_spare:3;
my $static;
if ( $] < 5.009004 ) {
$static = sprintf "%u", 65535;
$opsect_common .= "seq";
}
elsif ( $] < 5.010 ) {
$static = '0, 1, 0';
$opsect_common .= "opt, static, spare";
}
elsif ($] < 5.017002) {
$static = '0, 1, 0, 0, 0';
$opsect_common .= "opt, latefree, latefreed, attached, spare";
}
elsif ($] < 5.017004) {
$static = '0, 1, 0, 0, 0, 0, 0';
$opsect_common .= "opt, latefree, latefreed, attached, slabbed, savefree, spare";
}
elsif ($] < 5.017006) {
$static = '0, 1, 0, 0, 0, 0, 0';
$opsect_common .= "opt, latefree, latefreed, attached, slabbed, savefree, spare";
}
else { # 90840c5d1d 5.17.6
$static = '0, 0, 0, 1, 0';
$opsect_common .= "opt, slabbed, savefree, static, spare";
}
sub B::OP::_save_common_middle {
my $op = shift;
my $madprop = $MAD ? "0," : "";
# XXX maybe add a ix=opindex string for debugging if $debug{flags}
sprintf( "%s,%s %u, %u, $static, 0x%x, 0x%x",
$op->fake_ppaddr, $madprop, $op->targ, $op->type, $op->flags, $op->private );
}
$opsect_common .= ", flags, private";
}
# run-time loaded package, detected via bless or new.
sub force_dynpackage {
my $pv = shift;
no strict 'refs';
if ($pv and !$skip_package{$pv} and $pv !~ /^B::/) { # XXX only loaded at run-time
if (!$INC{inc_packname($pv)}) {
eval "require $pv;";
if (!$@) {
if (!$INC{inc_packname($pv)}) {
warn "Warning: Problem with require \"$pv\" - !\$INC{".inc_packname($pv)."}\n";
} else {
warn "load \"$pv\"\n" if $debug{meth};
}
}
}
mark_package($pv);
}
}
# Heuristic to check method calls for the class to store the full sub name.
# Also associate objects with classes - $obj=new Class; - to resolve method calls later.
# Compile-time method_named packages are always const PV sM/BARE.
# run-time packages ("objects") are in padsv (printed as gvsv).
# my Foo $obj = shift; $obj->bar();
# entersub -> pushmark -> package -> args.. -> method_named|method
# See perl -MO=Terse -e '$foo->bar("var")'
# See also http://www.perl.com/pub/2000/06/dougpatch.html
sub check_entersub {
my $op = shift;
my $cv = shift;
$cv = $B::C::curcv unless $cv;
if ($op->type > 0 and
$op->name eq 'entersub' and $op->first and $op->first->can('name') and
$op->first->name eq 'pushmark' and
# Foo->bar() compile-time lookup, 34 WANT_SCALAR,MOD in all versions
(($op->first->next->name eq 'const' and $op->first->next->flags == 34)
# or $foo->bar() run-time lookup
or ($op->first->next->name eq 'padsv'))) # note that padsv is called gvsv in Concise
{
my $pkgop = $op->first->next; # padsv for objects or const for classes
my $methop = $pkgop; # walk args until method or sub end. This ends
do { $methop = $methop->next; }
while ($methop->name !~ /^method_named|method$/
or ($methop->name eq 'gv' and $methop->next->name ne 'entersub'));
my $methopname = $methop->name;
if (substr($methopname,0,6) eq 'method') {
my $methodname = $methopname eq 'method' ? svop_name($methop, $cv) : svop_pv($methop, $cv);
if ($pkgop->name eq 'const') {
my $pv = svop_pv($pkgop, $cv); # 5.13: need to store away the pkg pv
if ($pv and $pv !~ /[! \(]/) {
warn "check package_pv $pv for $methopname \"$methodname\"\n" if $debug{meth};
# padsv package names are dynamic. They cannot be determined at compile-time,
# unless they are typed.
# We can catch the 'new' method and assign the const package_pv to the symbol
# and compare the padsv then. $foo=new Class;$foo->method; #main::foo => Class
# Note: 'new' is no keyword (yet), but good enough. We check bless also.
if ($methopname eq 'method_named' and 'new' eq svop_pv($methop, $cv)) {
my $objname = svop_name($pkgop);
my $symop = $op->next;
if (($symop->name eq 'padsv' or $symop->name eq 'gvsv')
and $symop->next->name eq 'sassign') {
no strict 'refs';
warn "cache object $objname = new $pv;\n" if $debug{meth};
force_dynpackage($pv);
svref_2object( \&{"$pv\::$methodname"} )->save
if $methodname and defined(&{"$pv\::$methodname"});
cache_svop_pkg($symop, $pv);
}
}
$package_pv = $pv;
push_package($package_pv);
}
} elsif ($pkgop->name eq 'padsv') { # check cached obj class
my $objname = padop_name($pkgop, $cv) || '';
if (my $pv = cache_svop_pkg($pkgop)) {
warn "cached package for $objname->$methodname found: \"$pv\"\n" if $debug{meth};
svref_2object( \&{"$pv\::$methodname"} )->save
if $methodname and defined(&{"$pv\::$methodname"});
$package_pv = $pv;