lib/perl5/5.6.1/dumpvar.pl

   1 require 5.002;                  # For (defined ref)
   2 package dumpvar;
   3
   4 # Needed for PrettyPrinter only:
   5
   6 # require 5.001;  # Well, it coredumps anyway undef DB in 5.000 (not now)
   7
   8 # translate control chars to ^X - Randal Schwartz
   9 # Modifications to print types by Peter Gordon v1.0
  10
  11 # Ilya Zakharevich -- patches after 5.001 (and some before ;-)
  12
  13 # Won't dump symbol tables and contents of debugged files by default
  14
  15 $winsize = 80 unless defined $winsize;
  16
  17
  18 # Defaults
  19
  20 # $globPrint = 1;
  21 $printUndef = 1 unless defined $printUndef;
  22 $tick = "auto" unless defined $tick;
  23 $unctrl = 'quote' unless defined $unctrl;
  24 $subdump = 1;
  25 $dumpReused = 0 unless defined $dumpReused;
  26 $bareStringify = 1 unless defined $bareStringify;
  27
  28 sub main::dumpValue {
  29   local %address;
  30   local $^W=0;
  31   (print "undef\n"), return unless defined $_[0];
  32   (print &stringify($_[0]), "\n"), return unless ref $_[0];
  33   dumpvar::unwrap($_[0],0);
  34 }
  35
  36 # This one is good for variable names:
  37
  38 sub unctrl {
  39         local($_) = @_;
  40         local($v) ;
  41
  42         return \$_ if ref \$_ eq "GLOB";
  43         s/([\001-\037\177])/'^'.pack('c',ord($1)^64)/eg;
  44         $_;
  45 }
  46
  47 sub stringify {
  48         local($_,$noticks) = @_;
  49         local($v) ;
  50         my $tick = $tick;
  51
  52         return 'undef' unless defined $_ or not $printUndef;
  53         return $_ . "" if ref \$_ eq 'GLOB';
  54         $_ = &{'overload::StrVal'}($_)
  55           if $bareStringify and ref $_
  56             and %overload:: and defined &{'overload::StrVal'};
  57
  58         if ($tick eq 'auto') {
  59           if (/[\000-\011\013-\037\177]/) {
  60             $tick = '"';
  61           }else {
  62             $tick = "'";
  63           }
  64         }
  65         if ($tick eq "'") {
  66           s/([\'\\])/\\$1/g;
  67         } elsif ($unctrl eq 'unctrl') {
  68           s/([\"\\])/\\$1/g ;
  69           s/([\000-\037\177])/'^'.pack('c',ord($1)^64)/eg;
  70           s/([\200-\377])/'\\0x'.sprintf('%2X',ord($1))/eg
  71             if $quoteHighBit;
  72         } elsif ($unctrl eq 'quote') {
  73           s/([\"\\\$\@])/\\$1/g if $tick eq '"';
  74           s/\033/\\e/g;
  75           s/([\000-\037\177])/'\\c'.chr(ord($1)^64)/eg;
  76         }
  77         s/([\200-\377])/'\\'.sprintf('%3o',ord($1))/eg if $quoteHighBit;
  78         ($noticks || /^\d+(\.\d*)?\Z/)
  79           ? $_
  80           : $tick . $_ . $tick;
  81 }
  82
  83 sub ShortArray {
  84   my $tArrayDepth = $#{$_[0]} ;
  85   $tArrayDepth = $#{$_[0]} < $arrayDepth-1 ? $#{$_[0]} : $arrayDepth-1
  86     unless  $arrayDepth eq '' ;
  87   my $shortmore = "";
  88   $shortmore = " ..." if $tArrayDepth < $#{$_[0]} ;
  89   if (!grep(ref $_, @{$_[0]})) {
  90     $short = "0..$#{$_[0]}  '" .
  91       join("' '", @{$_[0]}[0..$tArrayDepth]) . "'$shortmore";
  92     return $short if length $short <= $compactDump;
  93   }
  94   undef;
  95 }
  96
  97 sub DumpElem {
  98   my $short = &stringify($_[0], ref $_[0]);
  99   if ($veryCompact && ref $_[0]
 100       && (ref $_[0] eq 'ARRAY' and !grep(ref $_, @{$_[0]}) )) {
 101     my $end = "0..$#{$v}  '" .
 102       join("' '", @{$_[0]}[0..$tArrayDepth]) . "'$shortmore";
 103   } elsif ($veryCompact && ref $_[0]
 104       && (ref $_[0] eq 'HASH') and !grep(ref $_, values %{$_[0]})) {
 105     my $end = 1;
 106           $short = $sp . "0..$#{$v}  '" .
 107             join("' '", @{$v}[0..$tArrayDepth]) . "'$shortmore";
 108   } else {
 109     print "$short\n";
 110     unwrap($_[0],$_[1]);
 111   }
 112 }
 113
 114 sub unwrap {
 115     return if $DB::signal;
 116     local($v) = shift ;
 117     local($s) = shift ; # extra no of spaces
 118     local(%v,@v,$sp,$value,$key,@sortKeys,$more,$shortmore,$short) ;
 119     local($tHashDepth,$tArrayDepth) ;
 120
 121     $sp = " " x $s ;
 122     $s += 3 ;
 123
 124     # Check for reused addresses
 125     if (ref $v) {
 126       my $val = $v;
 127       $val = &{'overload::StrVal'}($v)
 128         if %overload:: and defined &{'overload::StrVal'};
 129       ($address) = $val =~ /(0x[0-9a-f]+)\)$/ ;
 130       if (!$dumpReused && defined $address) {
 131         $address{$address}++ ;
 132         if ( $address{$address} > 1 ) {
 133           print "${sp}-> REUSED_ADDRESS\n" ;
 134           return ;
 135         }
 136       }
 137     } elsif (ref \$v eq 'GLOB') {
 138       $address = "$v" . "";     # To avoid a bug with globs
 139       $address{$address}++ ;
 140       if ( $address{$address} > 1 ) {
 141         print "${sp}*DUMPED_GLOB*\n" ;
 142         return ;
 143       }
 144     }
 145
 146     if (ref $v eq 'Regexp') {
 147       my $re = "$v";
 148       $re =~ s,/,\\/,g;
 149       print "$sp-> qr/$re/\n";
 150       return;
 151     }
 152
 153     if ( UNIVERSAL::isa($v, 'HASH') ) {
 154         @sortKeys = sort keys(%$v) ;
 155         undef $more ;
 156         $tHashDepth = $#sortKeys ;
 157         $tHashDepth = $#sortKeys < $hashDepth-1 ? $#sortKeys : $hashDepth-1
 158           unless $hashDepth eq '' ;
 159         $more = "....\n" if $tHashDepth < $#sortKeys ;
 160         $shortmore = "";
 161         $shortmore = ", ..." if $tHashDepth < $#sortKeys ;
 162         $#sortKeys = $tHashDepth ;
 163         if ($compactDump && !grep(ref $_, values %{$v})) {
 164           #$short = $sp .
 165           #  (join ', ',
 166 # Next row core dumps during require from DB on 5.000, even with map {"_"}
 167           #   map {&stringify($_) . " => " . &stringify($v->{$_})}
 168           #   @sortKeys) . "'$shortmore";
 169           $short = $sp;
 170           my @keys;
 171           for (@sortKeys) {
 172             push @keys, &stringify($_) . " => " . &stringify($v->{$_});
 173           }
 174           $short .= join ', ', @keys;
 175           $short .= $shortmore;
 176           (print "$short\n"), return if length $short <= $compactDump;
 177         }
 178         for $key (@sortKeys) {
 179             return if $DB::signal;
 180             $value = $ {$v}{$key} ;
 181             print "$sp", &stringify($key), " => ";
 182             DumpElem $value, $s;
 183         }
 184         print "$sp  empty hash\n" unless @sortKeys;
 185         print "$sp$more" if defined $more ;
 186     } elsif ( UNIVERSAL::isa($v, 'ARRAY') ) {
 187         $tArrayDepth = $#{$v} ;
 188         undef $more ;
 189         $tArrayDepth = $#{$v} < $arrayDepth-1 ? $#{$v} : $arrayDepth-1
 190           unless  $arrayDepth eq '' ;
 191         $more = "....\n" if $tArrayDepth < $#{$v} ;
 192         $shortmore = "";
 193         $shortmore = " ..." if $tArrayDepth < $#{$v} ;
 194         if ($compactDump && !grep(ref $_, @{$v})) {
 195           if ($#$v >= 0) {
 196             $short = $sp . "0..$#{$v}  " .
 197               join(" ",
 198                    map {exists $v->[$_] ? stringify $v->[$_] : "empty"} ($[..$tArrayDepth)
 199                   ) . "$shortmore";
 200           } else {
 201             $short = $sp . "empty array";
 202           }
 203           (print "$short\n"), return if length $short <= $compactDump;
 204         }
 205         #if ($compactDump && $short = ShortArray($v)) {
 206         #  print "$short\n";
 207         #  return;
 208         #}
 209         for $num ($[ .. $tArrayDepth) {
 210             return if $DB::signal;
 211             print "$sp$num  ";
 212             if (exists $v->[$num]) {
 213                 DumpElem $v->[$num], $s;
 214             } else {
 215                 print "empty slot\n";
 216             }
 217         }
 218         print "$sp  empty array\n" unless @$v;
 219         print "$sp$more" if defined $more ;
 220     } elsif (  UNIVERSAL::isa($v, 'SCALAR') or ref $v eq 'REF' ) {
 221             print "$sp-> ";
 222             DumpElem $$v, $s;
 223     } elsif ( UNIVERSAL::isa($v, 'CODE') ) {
 224             print "$sp-> ";
 225             dumpsub (0, $v);
 226     } elsif ( UNIVERSAL::isa($v, 'GLOB') ) {
 227       print "$sp-> ",&stringify($$v,1),"\n";
 228       if ($globPrint) {
 229         $s += 3;
 230         dumpglob($s, "{$$v}", $$v, 1);
 231       } elsif (defined ($fileno = fileno($v))) {
 232         print( (' ' x ($s+3)) .  "FileHandle({$$v}) => fileno($fileno)\n" );
 233       }
 234     } elsif (ref \$v eq 'GLOB') {
 235       if ($globPrint) {
 236         dumpglob($s, "{$v}", $v, 1) if $globPrint;
 237       } elsif (defined ($fileno = fileno(\$v))) {
 238         print( (' ' x $s) .  "FileHandle({$v}) => fileno($fileno)\n" );
 239       }
 240     }
 241 }
 242
 243 sub matchvar {
 244   $_[0] eq $_[1] or
 245     ($_[1] =~ /^([!~])(.)([\x00-\xff]*)/) and
 246       ($1 eq '!') ^ (eval {($_[2] . "::" . $_[0]) =~ /$2$3/});
 247 }
 248
 249 sub compactDump {
 250   $compactDump = shift if @_;
 251   $compactDump = 6*80-1 if $compactDump and $compactDump < 2;
 252   $compactDump;
 253 }
 254
 255 sub veryCompact {
 256   $veryCompact = shift if @_;
 257   compactDump(1) if !$compactDump and $veryCompact;
 258   $veryCompact;
 259 }
 260
 261 sub unctrlSet {
 262   if (@_) {
 263     my $in = shift;
 264     if ($in eq 'unctrl' or $in eq 'quote') {
 265       $unctrl = $in;
 266     } else {
 267       print "Unknown value for `unctrl'.\n";
 268     }
 269   }
 270   $unctrl;
 271 }
 272
 273 sub quote {
 274   if (@_ and $_[0] eq '"') {
 275     $tick = '"';
 276     $unctrl = 'quote';
 277   } elsif (@_ and $_[0] eq 'auto') {
 278     $tick = 'auto';
 279     $unctrl = 'quote';
 280   } elsif (@_) {                # Need to set
 281     $tick = "'";
 282     $unctrl = 'unctrl';
 283   }
 284   $tick;
 285 }
 286
 287 sub dumpglob {
 288     return if $DB::signal;
 289     my ($off,$key, $val, $all) = @_;
 290     local(*entry) = $val;
 291     my $fileno;
 292     if (($key !~ /^_</ or $dumpDBFiles) and defined $entry) {
 293       print( (' ' x $off) . "\$", &unctrl($key), " = " );
 294       DumpElem $entry, 3+$off;
 295     }
 296     if (($key !~ /^_</ or $dumpDBFiles) and @entry) {
 297       print( (' ' x $off) . "\@$key = (\n" );
 298       unwrap(\@entry,3+$off) ;
 299       print( (' ' x $off) .  ")\n" );
 300     }
 301     if ($key ne "main::" && $key ne "DB::" && %entry
 302         && ($dumpPackages or $key !~ /::$/)
 303         && ($key !~ /^_</ or $dumpDBFiles)
 304         && !($package eq "dumpvar" and $key eq "stab")) {
 305       print( (' ' x $off) . "\%$key = (\n" );
 306       unwrap(\%entry,3+$off) ;
 307       print( (' ' x $off) .  ")\n" );
 308     }
 309     if (defined ($fileno = fileno(*entry))) {
 310       print( (' ' x $off) .  "FileHandle($key) => fileno($fileno)\n" );
 311     }
 312     if ($all) {
 313       if (defined &entry) {
 314         dumpsub($off, $key);
 315       }
 316     }
 317 }
 318
 319 sub CvGV_name_or_bust {
 320   my $in = shift;
 321   return if $skipCvGV;          # Backdoor to avoid problems if XS broken...
 322   $in = \&$in;                  # Hard reference...
 323   eval {require Devel::Peek; 1} or return;
 324   my $gv = Devel::Peek::CvGV($in) or return;
 325   *$gv{PACKAGE} . '::' . *$gv{NAME};
 326 }
 327
 328 sub dumpsub {
 329     my ($off,$sub) = @_;
 330     my $ini = $sub;
 331     my $s;
 332     $sub = $1 if $sub =~ /^\{\*(.*)\}$/;
 333     my $subref = defined $1 ? \&$sub : \&$ini;
 334     my $place = $DB::sub{$sub} || (($s = $subs{"$subref"}) && $DB::sub{$s})
 335       || (($s = CvGV_name_or_bust($subref)) && $DB::sub{$s})
 336       || ($subdump && ($s = findsubs("$subref")) && $DB::sub{$s});
 337     $place = '???' unless defined $place;
 338     $s = $sub unless defined $s;
 339     print( (' ' x $off) .  "&$s in $place\n" );
 340 }
 341
 342 sub findsubs {
 343   return undef unless %DB::sub;
 344   my ($addr, $name, $loc);
 345   while (($name, $loc) = each %DB::sub) {
 346     $addr = \&$name;
 347     $subs{"$addr"} = $name;
 348   }
 349   $subdump = 0;
 350   $subs{ shift() };
 351 }
 352
 353 sub main::dumpvar {
 354     my ($package,@vars) = @_;
 355     local(%address,$key,$val,$^W);
 356     $package .= "::" unless $package =~ /::$/;
 357     *stab = *{"main::"};
 358     while ($package =~ /(\w+?::)/g){
 359       *stab = $ {stab}{$1};
 360     }
 361     local $TotalStrings = 0;
 362     local $Strings = 0;
 363     local $CompleteTotal = 0;
 364     while (($key,$val) = each(%stab)) {
 365       return if $DB::signal;
 366       next if @vars && !grep( matchvar($key, $_), @vars );
 367       if ($usageOnly) {
 368         globUsage(\$val, $key)
 369           if ($package ne 'dumpvar' or $key ne 'stab')
 370              and ref(\$val) eq 'GLOB';
 371       } else {
 372         dumpglob(0,$key, $val);
 373       }
 374     }
 375     if ($usageOnly) {
 376       print "String space: $TotalStrings bytes in $Strings strings.\n";
 377       $CompleteTotal += $TotalStrings;
 378       print "Grand total = $CompleteTotal bytes (1 level deep) + overhead.\n";
 379     }
 380 }
 381
 382 sub scalarUsage {
 383   my $size = length($_[0]);
 384   $TotalStrings += $size;
 385   $Strings++;
 386   $size;
 387 }
 388
 389 sub arrayUsage {                # array ref, name
 390   my $size = 0;
 391   map {$size += scalarUsage($_)} @{$_[0]};
 392   my $len = @{$_[0]};
 393   print "\@$_[1] = $len item", ($len > 1 ? "s" : ""),
 394     " (data: $size bytes)\n"
 395       if defined $_[1];
 396   $CompleteTotal +=  $size;
 397   $size;
 398 }
 399
 400 sub hashUsage {         # hash ref, name
 401   my @keys = keys %{$_[0]};
 402   my @values = values %{$_[0]};
 403   my $keys = arrayUsage \@keys;
 404   my $values = arrayUsage \@values;
 405   my $len = @keys;
 406   my $total = $keys + $values;
 407   print "\%$_[1] = $len item", ($len > 1 ? "s" : ""),
 408     " (keys: $keys; values: $values; total: $total bytes)\n"
 409       if defined $_[1];
 410   $total;
 411 }
 412
 413 sub globUsage {                 # glob ref, name
 414   local *name = *{$_[0]};
 415   $total = 0;
 416   $total += scalarUsage $name if defined $name;
 417   $total += arrayUsage \@name, $_[1] if @name;
 418   $total += hashUsage \%name, $_[1] if %name and $_[1] ne "main::"
 419     and $_[1] ne "DB::";   #and !($package eq "dumpvar" and $key eq "stab"));
 420   $total;
 421 }
 422
 423 sub packageUsage {
 424   my ($package,@vars) = @_;
 425   $package .= "::" unless $package =~ /::$/;
 426   local *stab = *{"main::"};
 427   while ($package =~ /(\w+?::)/g){
 428     *stab = $ {stab}{$1};
 429   }
 430   local $TotalStrings = 0;
 431   local $CompleteTotal = 0;
 432   my ($key,$val);
 433   while (($key,$val) = each(%stab)) {
 434     next if @vars && !grep($key eq $_,@vars);
 435     globUsage \$val, $key unless $package eq 'dumpvar' and $key eq 'stab';
 436   }
 437   print "String space: $TotalStrings.\n";
 438   $CompleteTotal += $TotalStrings;
 439   print "\nGrand total = $CompleteTotal bytes\n";
 440 }
 441
 442 1;
 443