bytecode.pl

   1 BEGIN {
   2   push @INC, './lib';
   3 }
   4 use strict;
   5 my %alias_to = (
   6     U32 => [qw(PADOFFSET STRLEN)],
   7     I32 => [qw(SSize_t long)],
   8     U16 => [qw(OPCODE line_t short)],
   9     U8 => [qw(char)],
  10 );
  11
  12 my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);
  13
  14 # Nullsv *must* come first in the following so that the condition
  15 # ($$sv == 0) can continue to be used to test (sv == Nullsv).
  16 my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no pWARN_ALL pWARN_NONE);
  17
  18 my (%alias_from, $from, $tos);
  19 while (($from, $tos) = each %alias_to) {
  20     map { $alias_from{$_} = $from } @$tos;
  21 }
  22
  23 my $c_header = <<'EOT';
  24 /*
  25  *      Copyright (c) 1996-1999 Malcolm Beattie
  26  *
  27  *      You may distribute under the terms of either the GNU General Public
  28  *      License or the Artistic License, as specified in the README file.
  29  *
  30  */
  31 /*
  32  * This file is autogenerated from bytecode.pl. Changes made here will be lost.
  33  */
  34 EOT
  35
  36 my $perl_header;
  37 ($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;
  38
  39 unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm";
  40
  41 #
  42 # Start with boilerplate for Asmdata.pm
  43 #
  44 open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!";
  45 print ASMDATA_PM $perl_header, <<'EOT';
  46 package B::Asmdata;
  47
  48 our $VERSION = '1.00';
  49
  50 use Exporter;
  51 @ISA = qw(Exporter);
  52 @EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
  53 our(%insn_data, @insn_name, @optype, @specialsv_name);
  54
  55 EOT
  56 print ASMDATA_PM <<"EOT";
  57 \@optype = qw(@optype);
  58 \@specialsv_name = qw(@specialsv);
  59
  60 # XXX insn_data is initialised this way because with a large
  61 # %insn_data = (foo => [...], bar => [...], ...) initialiser
  62 # I get a hard-to-track-down stack underflow and segfault.
  63 EOT
  64
  65 #
  66 # Boilerplate for byterun.c
  67 #
  68 open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!";
  69 print BYTERUN_C $c_header, <<'EOT';
  70
  71 #define PERL_NO_GET_CONTEXT
  72 #include "EXTERN.h"
  73 #include "perl.h"
  74 #define NO_XSLOCKS
  75 #include "XSUB.h"
  76
  77 #include "byterun.h"
  78 #include "bytecode.h"
  79
  80
  81 static const int optype_size[] = {
  82 EOT
  83 my $i = 0;
  84 for ($i = 0; $i < @optype - 1; $i++) {
  85     printf BYTERUN_C "    sizeof(%s),\n", $optype[$i], $i;
  86 }
  87 printf BYTERUN_C "    sizeof(%s)\n", $optype[$i], $i;
  88 print BYTERUN_C <<'EOT';
  89 };
  90
  91 void *
  92 bset_obj_store(pTHX_ struct byteloader_state *bstate, void *obj, I32 ix)
  93 {
  94     if (ix > bstate->bs_obj_list_fill) {
  95         Renew(bstate->bs_obj_list, ix + 32, void*);
  96         bstate->bs_obj_list_fill = ix + 31;
  97     }
  98     bstate->bs_obj_list[ix] = obj;
  99     return obj;
 100 }
 101
 102 void
 103 byterun(pTHX_ register struct byteloader_state *bstate)
 104 {
 105     register int insn;
 106     U32 ix;
 107     SV *specialsv_list[6];
 108
 109     BYTECODE_HEADER_CHECK;      /* croak if incorrect platform */
 110     New(666, bstate->bs_obj_list, 32, void*); /* set op objlist */
 111     bstate->bs_obj_list_fill = 31;
 112
 113 EOT
 114
 115 for my $i ( 0 .. $#specialsv ) {
 116     print BYTERUN_C "    specialsv_list[$i] = $specialsv[$i];\n";
 117 }
 118
 119 print BYTERUN_C <<'EOT';
 120
 121     while ((insn = BGET_FGETC()) != EOF) {
 122         switch (insn) {
 123 EOT
 124
 125
 126 my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype);
 127
 128 while (<DATA>) {
 129     chop;
 130     s/#.*//;                    # remove comments
 131     next unless length;
 132     if (/^%number\s+(.*)/) {
 133         $insn_num = $1;
 134         next;
 135     } elsif (/%enum\s+(.*?)\s+(.*)/) {
 136         create_enum($1, $2);    # must come before instructions
 137         next;
 138     }
 139     ($insn, $lvalue, $argtype, $flags) = split;
 140     $insn_name[$insn_num] = $insn;
 141     $fundtype = $alias_from{$argtype} || $argtype;
 142
 143     #
 144     # Add the case statement and code for the bytecode interpreter in byterun.c
 145     #
 146     printf BYTERUN_C "\t  case INSN_%s:\t\t/* %d */\n\t    {\n",
 147         uc($insn), $insn_num;
 148     my $optarg = $argtype eq "none" ? "" : ", arg";
 149     if ($optarg) {
 150         printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype;
 151     }
 152     if ($flags =~ /x/) {
 153         print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n";
 154     } elsif ($flags =~ /s/) {
 155         # Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue.
 156         print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n";
 157     }
 158     elsif ($optarg && $lvalue ne "none") {
 159         print BYTERUN_C "\t\t$lvalue = arg;\n";
 160     }
 161     print BYTERUN_C "\t\tbreak;\n\t    }\n";
 162
 163     #
 164     # Add the initialiser line for %insn_data in Asmdata.pm
 165     #
 166     print ASMDATA_PM <<"EOT";
 167 \$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"];
 168 EOT
 169
 170     # Find the next unused instruction number
 171     do { $insn_num++ } while $insn_name[$insn_num];
 172 }
 173
 174 #
 175 # Finish off byterun.c
 176 #
 177 print BYTERUN_C <<'EOT';
 178           default:
 179             Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn);
 180             /* NOTREACHED */
 181         }
 182     }
 183 }
 184 EOT
 185
 186 #
 187 # Write the instruction and optype enum constants into byterun.h
 188 #
 189 open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!";
 190 print BYTERUN_H $c_header, <<'EOT';
 191 struct byteloader_fdata {
 192     SV  *datasv;
 193     int next_out;
 194     int idx;
 195 };
 196
 197 struct byteloader_state {
 198     struct byteloader_fdata     *bs_fdata;
 199     SV                          *bs_sv;
 200     void                        **bs_obj_list;
 201     int                         bs_obj_list_fill;
 202     XPV                         bs_pv;
 203     int                         bs_iv_overflows;
 204 };
 205
 206 int bl_getc(struct byteloader_fdata *);
 207 int bl_read(struct byteloader_fdata *, char *, size_t, size_t);
 208 extern void byterun(pTHX_ struct byteloader_state *);
 209
 210 enum {
 211 EOT
 212
 213 my $add_enum_value = 0;
 214 my $max_insn;
 215 for $i ( 0 .. $#insn_name ) {
 216     $insn = uc($insn_name[$i]);
 217     if (defined($insn)) {
 218         $max_insn = $i;
 219         if ($add_enum_value) {
 220             print BYTERUN_H "    INSN_$insn = $i,\t\t\t/* $i */\n";
 221             $add_enum_value = 0;
 222         } else {
 223             print BYTERUN_H "    INSN_$insn,\t\t\t/* $i */\n";
 224         }
 225     } else {
 226         $add_enum_value = 1;
 227     }
 228 }
 229
 230 print BYTERUN_H "    MAX_INSN = $max_insn\n};\n";
 231
 232 print BYTERUN_H "\nenum {\n";
 233 for ($i = 0; $i < @optype - 1; $i++) {
 234     printf BYTERUN_H "    OPt_%s,\t\t/* %d */\n", $optype[$i], $i;
 235 }
 236 printf BYTERUN_H "    OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i;
 237
 238 #
 239 # Finish off insn_data and create array initialisers in Asmdata.pm
 240 #
 241 print ASMDATA_PM <<'EOT';
 242
 243 my ($insn_name, $insn_data);
 244 while (($insn_name, $insn_data) = each %insn_data) {
 245     $insn_name[$insn_data->[0]] = $insn_name;
 246 }
 247 # Fill in any gaps
 248 @insn_name = map($_ || "unused", @insn_name);
 249
 250 1;
 251
 252 __END__
 253
 254 =head1 NAME
 255
 256 B::Asmdata - Autogenerated data about Perl ops, used to generate bytecode
 257
 258 =head1 SYNOPSIS
 259
 260         use Asmdata;
 261
 262 =head1 DESCRIPTION
 263
 264 See F<ext/B/B/Asmdata.pm>.
 265
 266 =head1 AUTHOR
 267
 268 Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
 269
 270 =cut
 271 EOT
 272
 273 __END__
 274 # First set instruction ord("#") to read comment to end-of-line (sneaky)
 275 %number 35
 276 comment         arg                     comment_t
 277 # Then make ord("\n") into a no-op
 278 %number 10
 279 nop             none                    none
 280 # Now for the rest of the ordinary ones, beginning with \0 which is
 281 # ret so that \0-terminated strings can be read properly as bytecode.
 282 %number 0
 283 #
 284 #opcode         lvalue                                  argtype         flags
 285 #
 286 ret             none                                    none            x
 287 ldsv            bstate->bs_sv                           svindex
 288 ldop            PL_op                                   opindex
 289 stsv            bstate->bs_sv                           U32             s
 290 stop            PL_op                                   U32             s
 291 stpv            bstate->bs_pv.xpv_pv                    U32             x
 292 ldspecsv        bstate->bs_sv                           U8              x
 293 newsv           bstate->bs_sv                           U8              x
 294 newop           PL_op                                   U8              x
 295 newopn          PL_op                                   U8              x
 296 newpv           none                                    PV
 297 pv_cur          bstate->bs_pv.xpv_cur                   STRLEN
 298 pv_free         bstate->bs_pv                           none            x
 299 sv_upgrade      bstate->bs_sv                           char            x
 300 sv_refcnt       SvREFCNT(bstate->bs_sv)                 U32
 301 sv_refcnt_add   SvREFCNT(bstate->bs_sv)                 I32             x
 302 sv_flags        SvFLAGS(bstate->bs_sv)                  U32
 303 xrv             SvRV(bstate->bs_sv)                     svindex
 304 xpv             bstate->bs_sv                           none            x
 305 xiv32           SvIVX(bstate->bs_sv)                    I32
 306 xiv64           SvIVX(bstate->bs_sv)                    IV64
 307 xnv             SvNVX(bstate->bs_sv)                    NV
 308 xlv_targoff     LvTARGOFF(bstate->bs_sv)                STRLEN
 309 xlv_targlen     LvTARGLEN(bstate->bs_sv)                STRLEN
 310 xlv_targ        LvTARG(bstate->bs_sv)                   svindex
 311 xlv_type        LvTYPE(bstate->bs_sv)                   char
 312 xbm_useful      BmUSEFUL(bstate->bs_sv)                 I32
 313 xbm_previous    BmPREVIOUS(bstate->bs_sv)               U16
 314 xbm_rare        BmRARE(bstate->bs_sv)                   U8
 315 xfm_lines       FmLINES(bstate->bs_sv)                  I32
 316 xio_lines       IoLINES(bstate->bs_sv)                  long
 317 xio_page        IoPAGE(bstate->bs_sv)                   long
 318 xio_page_len    IoPAGE_LEN(bstate->bs_sv)               long
 319 xio_lines_left  IoLINES_LEFT(bstate->bs_sv)             long
 320 xio_top_name    IoTOP_NAME(bstate->bs_sv)               pvcontents
 321 xio_top_gv      *(SV**)&IoTOP_GV(bstate->bs_sv)         svindex
 322 xio_fmt_name    IoFMT_NAME(bstate->bs_sv)               pvcontents
 323 xio_fmt_gv      *(SV**)&IoFMT_GV(bstate->bs_sv)         svindex
 324 xio_bottom_name IoBOTTOM_NAME(bstate->bs_sv)            pvcontents
 325 xio_bottom_gv   *(SV**)&IoBOTTOM_GV(bstate->bs_sv)      svindex
 326 xio_subprocess  IoSUBPROCESS(bstate->bs_sv)             short
 327 xio_type        IoTYPE(bstate->bs_sv)                   char
 328 xio_flags       IoFLAGS(bstate->bs_sv)                  char
 329 xcv_stash       *(SV**)&CvSTASH(bstate->bs_sv)          svindex
 330 xcv_start       CvSTART(bstate->bs_sv)                  opindex
 331 xcv_root        CvROOT(bstate->bs_sv)                   opindex
 332 xcv_gv          *(SV**)&CvGV(bstate->bs_sv)             svindex
 333 xcv_file        CvFILE(bstate->bs_sv)                   pvindex
 334 xcv_depth       CvDEPTH(bstate->bs_sv)                  long
 335 xcv_padlist     *(SV**)&CvPADLIST(bstate->bs_sv)        svindex
 336 xcv_outside     *(SV**)&CvOUTSIDE(bstate->bs_sv)        svindex
 337 xcv_flags       CvFLAGS(bstate->bs_sv)                  U16
 338 av_extend       bstate->bs_sv                           SSize_t         x
 339 av_push         bstate->bs_sv                           svindex         x
 340 xav_fill        AvFILLp(bstate->bs_sv)                  SSize_t
 341 xav_max         AvMAX(bstate->bs_sv)                    SSize_t
 342 xav_flags       AvFLAGS(bstate->bs_sv)                  U8
 343 xhv_riter       HvRITER(bstate->bs_sv)                  I32
 344 xhv_name        HvNAME(bstate->bs_sv)                   pvcontents
 345 hv_store        bstate->bs_sv                           svindex         x
 346 sv_magic        bstate->bs_sv                           char            x
 347 mg_obj          SvMAGIC(bstate->bs_sv)->mg_obj          svindex
 348 mg_private      SvMAGIC(bstate->bs_sv)->mg_private      U16
 349 mg_flags        SvMAGIC(bstate->bs_sv)->mg_flags        U8
 350 mg_pv           SvMAGIC(bstate->bs_sv)                  pvcontents      x
 351 xmg_stash       *(SV**)&SvSTASH(bstate->bs_sv)          svindex
 352 gv_fetchpv      bstate->bs_sv                           strconst        x
 353 gv_stashpv      bstate->bs_sv                           strconst        x
 354 gp_sv           GvSV(bstate->bs_sv)                     svindex
 355 gp_refcnt       GvREFCNT(bstate->bs_sv)                 U32
 356 gp_refcnt_add   GvREFCNT(bstate->bs_sv)                 I32             x
 357 gp_av           *(SV**)&GvAV(bstate->bs_sv)             svindex
 358 gp_hv           *(SV**)&GvHV(bstate->bs_sv)             svindex
 359 gp_cv           *(SV**)&GvCV(bstate->bs_sv)             svindex
 360 gp_file         GvFILE(bstate->bs_sv)                   pvindex
 361 gp_io           *(SV**)&GvIOp(bstate->bs_sv)            svindex
 362 gp_form         *(SV**)&GvFORM(bstate->bs_sv)           svindex
 363 gp_cvgen        GvCVGEN(bstate->bs_sv)                  U32
 364 gp_line         GvLINE(bstate->bs_sv)                   line_t
 365 gp_share        bstate->bs_sv                           svindex         x
 366 xgv_flags       GvFLAGS(bstate->bs_sv)                  U8
 367 op_next         PL_op->op_next                          opindex
 368 op_sibling      PL_op->op_sibling                       opindex
 369 op_ppaddr       PL_op->op_ppaddr                        strconst        x
 370 op_targ         PL_op->op_targ                          PADOFFSET
 371 op_type         PL_op                                   OPCODE          x
 372 op_seq          PL_op->op_seq                           U16
 373 op_flags        PL_op->op_flags                         U8
 374 op_private      PL_op->op_private                       U8
 375 op_first        cUNOP->op_first                         opindex
 376 op_last         cBINOP->op_last                         opindex
 377 op_other        cLOGOP->op_other                        opindex
 378 op_pmreplroot   cPMOP->op_pmreplroot                    opindex
 379 op_pmreplrootgv *(SV**)&cPMOP->op_pmreplroot            svindex
 380 op_pmreplstart  cPMOP->op_pmreplstart                   opindex
 381 op_pmnext       *(OP**)&cPMOP->op_pmnext                opindex
 382 pregcomp        PL_op                                   pvcontents      x
 383 op_pmflags      cPMOP->op_pmflags                       U16
 384 op_pmpermflags  cPMOP->op_pmpermflags                   U16
 385 op_sv           cSVOP->op_sv                            svindex
 386 op_padix        cPADOP->op_padix                        PADOFFSET
 387 op_pv           cPVOP->op_pv                            pvcontents
 388 op_pv_tr        cPVOP->op_pv                            op_tr_array
 389 op_redoop       cLOOP->op_redoop                        opindex
 390 op_nextop       cLOOP->op_nextop                        opindex
 391 op_lastop       cLOOP->op_lastop                        opindex
 392 cop_label       cCOP->cop_label                         pvindex
 393 cop_stashpv     cCOP                                    pvindex         x
 394 cop_file        cCOP                                    pvindex         x
 395 cop_seq         cCOP->cop_seq                           U32
 396 cop_arybase     cCOP->cop_arybase                       I32
 397 cop_line        cCOP                                    line_t          x
 398 cop_warnings    cCOP->cop_warnings                      svindex
 399 main_start      PL_main_start                           opindex
 400 main_root       PL_main_root                            opindex
 401 curpad          PL_curpad                               svindex         x
 402 push_begin      PL_beginav                              svindex         x
 403 push_init       PL_initav                               svindex         x
 404 push_end        PL_endav                                svindex         x