bytecode.pl

   1 BEGIN {
   2   push @INC, './lib';
   3   require 'regen_lib.pl';
   4 }
   5 use strict;
   6 my %alias_to = (
   7     U32 => [qw(line_t)],
   8     PADOFFSET => [qw(STRLEN SSize_t)],
   9     U16 => [qw(OPCODE short)],
  10     U8  => [qw(char)],
  11 );
  12
  13 my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);
  14
  15 # Nullsv *must* come first in the following so that the condition
  16 # ($$sv == 0) can continue to be used to test (sv == Nullsv).
  17 my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no pWARN_ALL pWARN_NONE);
  18
  19 my (%alias_from, $from, $tos);
  20 while (($from, $tos) = each %alias_to) {
  21     map { $alias_from{$_} = $from } @$tos;
  22 }
  23
  24 my $c_header = <<'EOT';
  25 /*
  26  *      Copyright (c) 1996-1999 Malcolm Beattie
  27  *
  28  *      You may distribute under the terms of either the GNU General Public
  29  *      License or the Artistic License, as specified in the README file.
  30  *
  31  */
  32 /*
  33  * This file is autogenerated from bytecode.pl. Changes made here will be lost.
  34  */
  35 EOT
  36
  37 my $perl_header;
  38 ($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;
  39
  40 safer_unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm";
  41
  42 #
  43 # Start with boilerplate for Asmdata.pm
  44 #
  45 open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!";
  46 binmode ASMDATA_PM;
  47 print ASMDATA_PM $perl_header, <<'EOT';
  48 package B::Asmdata;
  49
  50 our $VERSION = '1.01';
  51
  52 use Exporter;
  53 @ISA = qw(Exporter);
  54 @EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
  55 our(%insn_data, @insn_name, @optype, @specialsv_name);
  56
  57 EOT
  58 print ASMDATA_PM <<"EOT";
  59 \@optype = qw(@optype);
  60 \@specialsv_name = qw(@specialsv);
  61
  62 # XXX insn_data is initialised this way because with a large
  63 # %insn_data = (foo => [...], bar => [...], ...) initialiser
  64 # I get a hard-to-track-down stack underflow and segfault.
  65 EOT
  66
  67 #
  68 # Boilerplate for byterun.c
  69 #
  70 open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!";
  71 binmode BYTERUN_C;
  72 print BYTERUN_C $c_header, <<'EOT';
  73
  74 #define PERL_NO_GET_CONTEXT
  75 #include "EXTERN.h"
  76 #include "perl.h"
  77 #define NO_XSLOCKS
  78 #include "XSUB.h"
  79
  80 #include "byterun.h"
  81 #include "bytecode.h"
  82
  83
  84 static const int optype_size[] = {
  85 EOT
  86 my $i = 0;
  87 for ($i = 0; $i < @optype - 1; $i++) {
  88     printf BYTERUN_C "    sizeof(%s),\n", $optype[$i], $i;
  89 }
  90 printf BYTERUN_C "    sizeof(%s)\n", $optype[$i], $i;
  91 print BYTERUN_C <<'EOT';
  92 };
  93
  94 void *
  95 bset_obj_store(pTHX_ struct byteloader_state *bstate, void *obj, I32 ix)
  96 {
  97     if (ix > bstate->bs_obj_list_fill) {
  98         Renew(bstate->bs_obj_list, ix + 32, void*);
  99         bstate->bs_obj_list_fill = ix + 31;
 100     }
 101     bstate->bs_obj_list[ix] = obj;
 102     return obj;
 103 }
 104
 105 int
 106 byterun(pTHX_ register struct byteloader_state *bstate)
 107 {
 108     dVAR;
 109     register int insn;
 110     U32 ix;
 111     SV *specialsv_list[6];
 112
 113     BYTECODE_HEADER_CHECK;      /* croak if incorrect platform */
 114     New(666, bstate->bs_obj_list, 32, void*); /* set op objlist */
 115     bstate->bs_obj_list_fill = 31;
 116     bstate->bs_obj_list[0] = NULL; /* first is always Null */
 117     bstate->bs_ix = 1;
 118
 119 EOT
 120
 121 for my $i ( 0 .. $#specialsv ) {
 122     print BYTERUN_C "    specialsv_list[$i] = $specialsv[$i];\n";
 123 }
 124
 125 print BYTERUN_C <<'EOT';
 126
 127     while ((insn = BGET_FGETC()) != EOF) {
 128         switch (insn) {
 129 EOT
 130
 131
 132 my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype);
 133
 134 while (<DATA>) {
 135     if (/^\s*#/) {
 136         print BYTERUN_C if /^\s*#\s*(?:if|endif|el)/;
 137         next;
 138     }
 139     chop;
 140     next unless length;
 141     if (/^%number\s+(.*)/) {
 142         $insn_num = $1;
 143         next;
 144     } elsif (/%enum\s+(.*?)\s+(.*)/) {
 145         create_enum($1, $2);    # must come before instructions
 146         next;
 147     }
 148     ($insn, $lvalue, $argtype, $flags) = split;
 149     my $rvalcast = '';
 150     if ($argtype =~ m:(.+)/(.+):) {
 151         ($rvalcast, $argtype) = ("($1)", $2);
 152     }
 153     $insn_name[$insn_num] = $insn;
 154     $fundtype = $alias_from{$argtype} || $argtype;
 155
 156     #
 157     # Add the case statement and code for the bytecode interpreter in byterun.c
 158     #
 159     printf BYTERUN_C "\t  case INSN_%s:\t\t/* %d */\n\t    {\n",
 160         uc($insn), $insn_num;
 161     my $optarg = $argtype eq "none" ? "" : ", arg";
 162     if ($optarg) {
 163         printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype;
 164     }
 165     if ($flags =~ /x/) {
 166         print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n";
 167     } elsif ($flags =~ /s/) {
 168         # Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue.
 169         print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n";
 170     }
 171     elsif ($optarg && $lvalue ne "none") {
 172         print BYTERUN_C "\t\t$lvalue = ${rvalcast}arg;\n";
 173     }
 174     print BYTERUN_C "\t\tbreak;\n\t    }\n";
 175
 176     #
 177     # Add the initialiser line for %insn_data in Asmdata.pm
 178     #
 179     print ASMDATA_PM <<"EOT";
 180 \$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"];
 181 EOT
 182
 183     # Find the next unused instruction number
 184     do { $insn_num++ } while $insn_name[$insn_num];
 185 }
 186
 187 #
 188 # Finish off byterun.c
 189 #
 190 print BYTERUN_C <<'EOT';
 191           default:
 192             Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn);
 193             /* NOTREACHED */
 194         }
 195     }
 196     return 0;
 197 }
 198 EOT
 199
 200 #
 201 # Write the instruction and optype enum constants into byterun.h
 202 #
 203 open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!";
 204 binmode BYTERUN_H;
 205 print BYTERUN_H $c_header, <<'EOT';
 206 struct byteloader_fdata {
 207     SV  *datasv;
 208     int next_out;
 209     int idx;
 210 };
 211
 212 struct byteloader_state {
 213     struct byteloader_fdata     *bs_fdata;
 214     SV                          *bs_sv;
 215     void                        **bs_obj_list;
 216     int                         bs_obj_list_fill;
 217     int                         bs_ix;
 218     XPV                         bs_pv;
 219     int                         bs_iv_overflows;
 220 };
 221
 222 int bl_getc(struct byteloader_fdata *);
 223 int bl_read(struct byteloader_fdata *, char *, size_t, size_t);
 224 extern int byterun(pTHX_ struct byteloader_state *);
 225
 226 enum {
 227 EOT
 228
 229 my $add_enum_value = 0;
 230 my $max_insn;
 231 for $i ( 0 .. $#insn_name ) {
 232     $insn = uc($insn_name[$i]);
 233     if (defined($insn)) {
 234         $max_insn = $i;
 235         if ($add_enum_value) {
 236             print BYTERUN_H "    INSN_$insn = $i,\t\t\t/* $i */\n";
 237             $add_enum_value = 0;
 238         } else {
 239             print BYTERUN_H "    INSN_$insn,\t\t\t/* $i */\n";
 240         }
 241     } else {
 242         $add_enum_value = 1;
 243     }
 244 }
 245
 246 print BYTERUN_H "    MAX_INSN = $max_insn\n};\n";
 247
 248 print BYTERUN_H "\nenum {\n";
 249 for ($i = 0; $i < @optype - 1; $i++) {
 250     printf BYTERUN_H "    OPt_%s,\t\t/* %d */\n", $optype[$i], $i;
 251 }
 252 printf BYTERUN_H "    OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i;
 253
 254 #
 255 # Finish off insn_data and create array initialisers in Asmdata.pm
 256 #
 257 print ASMDATA_PM <<'EOT';
 258
 259 my ($insn_name, $insn_data);
 260 while (($insn_name, $insn_data) = each %insn_data) {
 261     $insn_name[$insn_data->[0]] = $insn_name;
 262 }
 263 # Fill in any gaps
 264 @insn_name = map($_ || "unused", @insn_name);
 265
 266 1;
 267
 268 __END__
 269
 270 =head1 NAME
 271
 272 B::Asmdata - Autogenerated data about Perl ops, used to generate bytecode
 273
 274 =head1 SYNOPSIS
 275
 276         use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name);
 277
 278 =head1 DESCRIPTION
 279
 280 Provides information about Perl ops in order to generate bytecode via
 281 a bunch of exported variables.  Its mostly used by B::Assembler and
 282 B::Disassembler.
 283
 284 =over 4
 285
 286 =item %insn_data
 287
 288   my($bytecode_num, $put_sub, $get_meth) = @$insn_data{$op_name};
 289
 290 For a given $op_name (for example, 'cop_label', 'sv_flags', etc...)
 291 you get an array ref containing the bytecode number of the op, a
 292 reference to the subroutine used to 'PUT', and the name of the method
 293 used to 'GET'.
 294
 295 =for _private
 296 Add more detail about what $put_sub and $get_meth are and how to use them.
 297
 298 =item @insn_name
 299
 300   my $op_name = $insn_name[$bytecode_num];
 301
 302 A simple mapping of the bytecode number to the name of the op.
 303 Suitable for using with %insn_data like so:
 304
 305   my $op_info = $insn_data{$insn_name[$bytecode_num]};
 306
 307 =item @optype
 308
 309   my $op_type = $optype[$op_type_num];
 310
 311 A simple mapping of the op type number to its type (like 'COP' or 'BINOP').
 312
 313 =item @specialsv_name
 314
 315   my $sv_name = $specialsv_name[$sv_index];
 316
 317 Certain SV types are considered 'special'.  They're represented by
 318 B::SPECIAL and are refered to by a number from the specialsv_list.
 319 This array maps that number back to the name of the SV (like 'Nullsv'
 320 or '&PL_sv_undef').
 321
 322 =back
 323
 324 =head1 AUTHOR
 325
 326 Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
 327
 328 =cut
 329 EOT
 330
 331
 332 close ASMDATA_PM or die "Error closing ASMDATA_PM: $!";
 333 close BYTERUN_H or die "Error closing BYTERUN_H: $!";
 334 close BYTERUN_C or die "Error closing BYTERUN_C: $!";
 335
 336 __END__
 337 # First set instruction ord("#") to read comment to end-of-line (sneaky)
 338 %number 35
 339 comment         arg                     comment_t
 340 # Then make ord("\n") into a no-op
 341 %number 10
 342 nop             none                    none
 343
 344 # Now for the rest of the ordinary ones, beginning with \0 which is
 345 # ret so that \0-terminated strings can be read properly as bytecode.
 346 %number 0
 347 #
 348 # The argtype is either a single type or "rightvaluecast/argtype".
 349 #
 350 #opcode         lvalue                                  argtype         flags
 351 #
 352 ret             none                                    none            x
 353 ldsv            bstate->bs_sv                           svindex
 354 ldop            PL_op                                   opindex
 355 stsv            bstate->bs_sv                           U32             s
 356 stop            PL_op                                   U32             s
 357 stpv            bstate->bs_pv.xpv_pv                    U32             x
 358 ldspecsv        bstate->bs_sv                           U8              x
 359 ldspecsvx       bstate->bs_sv                           U8              x
 360 newsv           bstate->bs_sv                           U8              x
 361 newsvx          bstate->bs_sv                           U32             x
 362 newop           PL_op                                   U8              x
 363 newopx          PL_op                                   U16             x
 364 newopn          PL_op                                   U8              x
 365 newpv           none                                    PV
 366 pv_cur          bstate->bs_pv.xpv_cur                   STRLEN
 367 pv_free         bstate->bs_pv                           none            x
 368 sv_upgrade      bstate->bs_sv                           U8              x
 369 sv_refcnt       SvREFCNT(bstate->bs_sv)                 U32
 370 sv_refcnt_add   SvREFCNT(bstate->bs_sv)                 I32             x
 371 sv_flags        SvFLAGS(bstate->bs_sv)                  U32
 372 xrv             bstate->bs_sv                           svindex         x
 373 xpv             bstate->bs_sv                           none            x
 374 xpv_cur         bstate->bs_sv                           STRLEN          x
 375 xpv_len         bstate->bs_sv                           STRLEN          x
 376 xiv             bstate->bs_sv                           IV              x
 377 xnv             bstate->bs_sv                           NV              x
 378 xlv_targoff     LvTARGOFF(bstate->bs_sv)                STRLEN
 379 xlv_targlen     LvTARGLEN(bstate->bs_sv)                STRLEN
 380 xlv_targ        LvTARG(bstate->bs_sv)                   svindex
 381 xlv_type        LvTYPE(bstate->bs_sv)                   char
 382 xbm_useful      BmUSEFUL(bstate->bs_sv)                 I32
 383 xbm_previous    BmPREVIOUS(bstate->bs_sv)               U16
 384 xbm_rare        BmRARE(bstate->bs_sv)                   U8
 385 xfm_lines       FmLINES(bstate->bs_sv)                  IV
 386 xio_lines       IoLINES(bstate->bs_sv)                  IV
 387 xio_page        IoPAGE(bstate->bs_sv)                   IV
 388 xio_page_len    IoPAGE_LEN(bstate->bs_sv)               IV
 389 xio_lines_left  IoLINES_LEFT(bstate->bs_sv)             IV
 390 xio_top_name    IoTOP_NAME(bstate->bs_sv)               pvindex
 391 xio_top_gv      *(SV**)&IoTOP_GV(bstate->bs_sv)         svindex
 392 xio_fmt_name    IoFMT_NAME(bstate->bs_sv)               pvindex
 393 xio_fmt_gv      *(SV**)&IoFMT_GV(bstate->bs_sv)         svindex
 394 xio_bottom_name IoBOTTOM_NAME(bstate->bs_sv)            pvindex
 395 xio_bottom_gv   *(SV**)&IoBOTTOM_GV(bstate->bs_sv)      svindex
 396 xio_subprocess  IoSUBPROCESS(bstate->bs_sv)             short
 397 xio_type        IoTYPE(bstate->bs_sv)                   char
 398 xio_flags       IoFLAGS(bstate->bs_sv)                  char
 399 xcv_xsubany     *(SV**)&CvXSUBANY(bstate->bs_sv).any_ptr        svindex
 400 xcv_stash       *(SV**)&CvSTASH(bstate->bs_sv)          svindex
 401 xcv_start       CvSTART(bstate->bs_sv)                  opindex
 402 xcv_root        CvROOT(bstate->bs_sv)                   opindex
 403 xcv_gv          *(SV**)&CvGV(bstate->bs_sv)             svindex
 404 xcv_file        CvFILE(bstate->bs_sv)                   pvindex
 405 xcv_depth       CvDEPTH(bstate->bs_sv)                  long
 406 xcv_padlist     *(SV**)&CvPADLIST(bstate->bs_sv)        svindex
 407 xcv_outside     *(SV**)&CvOUTSIDE(bstate->bs_sv)        svindex
 408 xcv_outside_seq CvOUTSIDE_SEQ(bstate->bs_sv)            U32
 409 xcv_flags       CvFLAGS(bstate->bs_sv)                  U16
 410 av_extend       bstate->bs_sv                           SSize_t         x
 411 av_pushx        bstate->bs_sv                           svindex         x
 412 av_push         bstate->bs_sv                           svindex         x
 413 xav_fill        AvFILLp(bstate->bs_sv)                  SSize_t
 414 xav_max         AvMAX(bstate->bs_sv)                    SSize_t
 415 xav_flags       AvFLAGS(bstate->bs_sv)                  U8
 416 xhv_riter       HvRITER(bstate->bs_sv)                  I32
 417 xhv_name        HvNAME(bstate->bs_sv)                   pvindex
 418 xhv_pmroot      *(OP**)&HvPMROOT(bstate->bs_sv)         opindex
 419 hv_store        bstate->bs_sv                           svindex         x
 420 sv_magic        bstate->bs_sv                           char            x
 421 mg_obj          SvMAGIC(bstate->bs_sv)->mg_obj          svindex
 422 mg_private      SvMAGIC(bstate->bs_sv)->mg_private      U16
 423 mg_flags        SvMAGIC(bstate->bs_sv)->mg_flags        U8
 424 mg_name         SvMAGIC(bstate->bs_sv)                  pvcontents      x
 425 mg_namex        SvMAGIC(bstate->bs_sv)                  svindex         x
 426 xmg_stash       bstate->bs_sv                           svindex         x
 427 gv_fetchpv      bstate->bs_sv                           strconst        x
 428 gv_fetchpvx     bstate->bs_sv                           strconst        x
 429 gv_stashpv      bstate->bs_sv                           strconst        x
 430 gv_stashpvx     bstate->bs_sv                           strconst        x
 431 gp_sv           GvSV(bstate->bs_sv)                     svindex
 432 gp_refcnt       GvREFCNT(bstate->bs_sv)                 U32
 433 gp_refcnt_add   GvREFCNT(bstate->bs_sv)                 I32             x
 434 gp_av           *(SV**)&GvAV(bstate->bs_sv)             svindex
 435 gp_hv           *(SV**)&GvHV(bstate->bs_sv)             svindex
 436 gp_cv           *(SV**)&GvCV(bstate->bs_sv)             svindex
 437 gp_file         GvFILE(bstate->bs_sv)                   pvindex
 438 gp_io           *(SV**)&GvIOp(bstate->bs_sv)            svindex
 439 gp_form         *(SV**)&GvFORM(bstate->bs_sv)           svindex
 440 gp_cvgen        GvCVGEN(bstate->bs_sv)                  U32
 441 gp_line         GvLINE(bstate->bs_sv)                   line_t
 442 gp_share        bstate->bs_sv                           svindex         x
 443 xgv_flags       GvFLAGS(bstate->bs_sv)                  U8
 444 op_next         PL_op->op_next                          opindex
 445 op_sibling      PL_op->op_sibling                       opindex
 446 op_ppaddr       PL_op->op_ppaddr                        strconst        x
 447 op_targ         PL_op->op_targ                          PADOFFSET
 448 op_type         PL_op                                   OPCODE          x
 449 op_opt          PL_op->op_opt                           U8
 450 op_static       PL_op->op_static                        U8
 451 op_flags        PL_op->op_flags                         U8
 452 op_private      PL_op->op_private                       U8
 453 op_first        cUNOP->op_first                         opindex
 454 op_last         cBINOP->op_last                         opindex
 455 op_other        cLOGOP->op_other                        opindex
 456 op_pmreplroot   cPMOP->op_pmreplroot                    opindex
 457 op_pmreplstart  cPMOP->op_pmreplstart                   opindex
 458 op_pmnext       *(OP**)&cPMOP->op_pmnext                opindex
 459 #ifdef USE_ITHREADS
 460 op_pmstashpv    cPMOP                                   pvindex         x
 461 op_pmreplrootpo cPMOP->op_pmreplroot                    OP*/PADOFFSET
 462 #else
 463 op_pmstash      *(SV**)&cPMOP->op_pmstash               svindex
 464 op_pmreplrootgv *(SV**)&cPMOP->op_pmreplroot            svindex
 465 #endif
 466 pregcomp        PL_op                                   pvcontents      x
 467 op_pmflags      cPMOP->op_pmflags                       U16
 468 op_pmpermflags  cPMOP->op_pmpermflags                   U16
 469 op_pmdynflags   cPMOP->op_pmdynflags                    U8
 470 op_sv           cSVOP->op_sv                            svindex
 471 op_padix        cPADOP->op_padix                        PADOFFSET
 472 op_pv           cPVOP->op_pv                            pvcontents
 473 op_pv_tr        cPVOP->op_pv                            op_tr_array
 474 op_redoop       cLOOP->op_redoop                        opindex
 475 op_nextop       cLOOP->op_nextop                        opindex
 476 op_lastop       cLOOP->op_lastop                        opindex
 477 cop_label       cCOP->cop_label                         pvindex
 478 #ifdef USE_ITHREADS
 479 cop_stashpv     cCOP                                    pvindex         x
 480 cop_file        cCOP                                    pvindex         x
 481 #else
 482 cop_stash       cCOP                                    svindex         x
 483 cop_filegv      cCOP                                    svindex         x
 484 #endif
 485 cop_seq         cCOP->cop_seq                           U32
 486 cop_arybase     cCOP->cop_arybase                       I32
 487 cop_line        cCOP->cop_line                          line_t
 488 cop_io          cCOP->cop_io                            svindex
 489 cop_warnings    cCOP->cop_warnings                      svindex
 490 main_start      PL_main_start                           opindex
 491 main_root       PL_main_root                            opindex
 492 main_cv         *(SV**)&PL_main_cv                      svindex
 493 curpad          PL_curpad                               svindex         x
 494 push_begin      PL_beginav                              svindex         x
 495 push_init       PL_initav                               svindex         x
 496 push_end        PL_endav                                svindex         x
 497 curstash        *(SV**)&PL_curstash                     svindex
 498 defstash        *(SV**)&PL_defstash                     svindex
 499 data            none                                    U8              x
 500 incav           *(SV**)&GvAV(PL_incgv)                  svindex
 501 load_glob       none                                    svindex         x
 502 #ifdef USE_ITHREADS
 503 regex_padav     *(SV**)&PL_regex_padav                  svindex
 504 #endif
 505 dowarn          PL_dowarn                               U8
 506 comppad_name    *(SV**)&PL_comppad_name                 svindex
 507 xgv_stash       *(SV**)&GvSTASH(bstate->bs_sv)          svindex
 508 signal          bstate->bs_sv                           strconst        x
 509 # to be removed
 510 formfeed        PL_formfeed                             svindex