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