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