ext/ByteLoader/bytecode.h

   1 typedef char *pvcontents;
   2 typedef char *strconst;
   3 typedef U32 PV;
   4 typedef char *op_tr_array;
   5 typedef int comment_t;
   6 typedef SV *svindex;
   7 typedef OP *opindex;
   8 typedef char *pvindex;
   9
  10 #define BGET_FREAD(argp, len, nelem)    \
  11          bl_read(bstate->bs_fdata,(char*)(argp),(len),(nelem))
  12 #define BGET_FGETC() bl_getc(bstate->bs_fdata)
  13
  14 /* all this should be made endianness-agnostic */
  15
  16 #define BGET_U8(arg)    arg = BGET_FGETC()
  17 #define BGET_U16(arg)   \
  18         BGET_FREAD(&arg, sizeof(U16), 1)
  19 #define BGET_U32(arg)   \
  20         BGET_FREAD(&arg, sizeof(U32), 1)
  21 #define BGET_UV(arg)    \
  22         BGET_FREAD(&arg, sizeof(UV), 1)
  23 #define BGET_PADOFFSET(arg)     \
  24         BGET_FREAD(&arg, sizeof(PADOFFSET), 1)
  25 #define BGET_long(arg)          \
  26         BGET_FREAD(&arg, sizeof(long), 1)
  27
  28 #define BGET_I32(arg)   BGET_U32(arg)
  29 #define BGET_IV(arg)    BGET_UV(arg)
  30
  31 #define BGET_PV(arg)    STMT_START {                                    \
  32         BGET_U32(arg);                                                  \
  33         if (arg) {                                                      \
  34             New(666, bstate->bs_pv.xpv_pv, arg, char);                  \
  35             bl_read(bstate->bs_fdata, bstate->bs_pv.xpv_pv, arg, 1);    \
  36             bstate->bs_pv.xpv_len = arg;                                \
  37             bstate->bs_pv.xpv_cur = arg - 1;                            \
  38         } else {                                                        \
  39             bstate->bs_pv.xpv_pv = 0;                                   \
  40             bstate->bs_pv.xpv_len = 0;                                  \
  41             bstate->bs_pv.xpv_cur = 0;                                  \
  42         }                                                               \
  43     } STMT_END
  44
  45 #ifdef BYTELOADER_LOG_COMMENTS
  46 #  define BGET_comment_t(arg) \
  47     STMT_START {                                                        \
  48         char buf[1024];                                                 \
  49         int i = 0;                                                      \
  50         do {                                                            \
  51             arg = BGET_FGETC();                                         \
  52             buf[i++] = (char)arg;                                       \
  53         } while (arg != '\n' && arg != EOF);                            \
  54         buf[i] = '\0';                                                  \
  55         PerlIO_printf(PerlIO_stderr(), "%s", buf);                      \
  56     } STMT_END
  57 #else
  58 #  define BGET_comment_t(arg) \
  59         do { arg = BGET_FGETC(); } while (arg != '\n' && arg != EOF)
  60 #endif
  61
  62
  63 #define BGET_op_tr_array(arg) do {                      \
  64         unsigned short *ary, len;                       \
  65         BGET_U16(len);                                  \
  66         New(666, ary, len, unsigned short);             \
  67         BGET_FREAD(ary, sizeof(unsigned short), len);   \
  68         arg = (char *) ary;                             \
  69     } while (0)
  70
  71 #define BGET_pvcontents(arg)    arg = bstate->bs_pv.xpv_pv
  72 #define BGET_strconst(arg) STMT_START { \
  73         for (arg = PL_tokenbuf; (*arg = BGET_FGETC()); arg++) /* nothing */; \
  74         arg = PL_tokenbuf;                      \
  75     } STMT_END
  76
  77 #define BGET_NV(arg) STMT_START {       \
  78         char *str;                      \
  79         BGET_strconst(str);             \
  80         arg = Atof(str);                \
  81     } STMT_END
  82
  83 #define BGET_objindex(arg, type) STMT_START {   \
  84         BGET_U32(ix);                           \
  85         arg = (type)bstate->bs_obj_list[ix];    \
  86     } STMT_END
  87 #define BGET_svindex(arg) BGET_objindex(arg, svindex)
  88 #define BGET_opindex(arg) BGET_objindex(arg, opindex)
  89 #define BGET_pvindex(arg) STMT_START {                  \
  90         BGET_objindex(arg, pvindex);                    \
  91         arg = arg ? savepv(arg) : arg;                  \
  92     } STMT_END
  93
  94 #define BSET_ldspecsv(sv, arg) sv = specialsv_list[arg]
  95 #define BSET_ldspecsvx(sv, arg) STMT_START {    \
  96         BSET_ldspecsv(sv, arg);                 \
  97         BSET_OBJ_STOREX(sv);                    \
  98     } STMT_END
  99
 100 #define BSET_stpv(pv, arg) STMT_START {         \
 101         BSET_OBJ_STORE(pv, arg);                \
 102         SAVEFREEPV(pv);                         \
 103     } STMT_END
 104
 105 #define BSET_sv_refcnt_add(svrefcnt, arg)       svrefcnt += arg
 106 #define BSET_gp_refcnt_add(gprefcnt, arg)       gprefcnt += arg
 107 #define BSET_gp_share(sv, arg) STMT_START {     \
 108         gp_free((GV*)sv);                       \
 109         GvGP(sv) = GvGP(arg);                   \
 110     } STMT_END
 111
 112 #define BSET_gv_fetchpv(sv, arg)        sv = (SV*)gv_fetchpv(arg, TRUE, SVt_PV)
 113 #define BSET_gv_fetchpvx(sv, arg) STMT_START {  \
 114         BSET_gv_fetchpv(sv, arg);               \
 115         BSET_OBJ_STOREX(sv);                    \
 116     } STMT_END
 117
 118 #define BSET_gv_stashpv(sv, arg)        sv = (SV*)gv_stashpv(arg, TRUE)
 119 #define BSET_gv_stashpvx(sv, arg) STMT_START {  \
 120         BSET_gv_stashpv(sv, arg);               \
 121         BSET_OBJ_STOREX(sv);                    \
 122     } STMT_END
 123
 124 #define BSET_sv_magic(sv, arg)          sv_magic(sv, Nullsv, arg, 0, 0)
 125 #define BSET_mg_name(mg, arg)   mg->mg_ptr = arg; mg->mg_len = bstate->bs_pv.xpv_cur
 126 #define BSET_mg_namex(mg, arg)                  \
 127         (mg->mg_ptr = (char*)SvREFCNT_inc((SV*)arg),    \
 128          mg->mg_len = HEf_SVKEY)
 129 #define BSET_sv_upgrade(sv, arg)        (void)SvUPGRADE(sv, arg)
 130 #define BSET_xpv(sv)    do {    \
 131         SvPV_set(sv, bstate->bs_pv.xpv_pv);     \
 132         SvCUR_set(sv, bstate->bs_pv.xpv_cur);   \
 133         SvLEN_set(sv, bstate->bs_pv.xpv_len);   \
 134     } while (0)
 135 #define BSET_av_extend(sv, arg) av_extend((AV*)sv, arg)
 136
 137 #define BSET_av_push(sv, arg)   av_push((AV*)sv, arg)
 138 #define BSET_av_pushx(sv, arg)  (AvARRAY(sv)[++AvFILLp(sv)] = arg)
 139 #define BSET_hv_store(sv, arg)  \
 140         hv_store((HV*)sv, bstate->bs_pv.xpv_pv, bstate->bs_pv.xpv_cur, arg, 0)
 141 #define BSET_pv_free(pv)        Safefree(pv.xpv_pv)
 142
 143
 144 #ifdef USE_ITHREADS
 145
 146 /* copied after the code in newPMOP() */
 147 #define BSET_pregcomp(o, arg) \
 148     STMT_START { \
 149         SV* repointer; \
 150         REGEXP* rx = arg ? \
 151             CALLREGCOMP(aTHX_ arg, arg + bstate->bs_pv.xpv_cur, cPMOPx(o)) : \
 152             Null(REGEXP*); \
 153         if(av_len((AV*) PL_regex_pad[0]) > -1) { \
 154             repointer = av_pop((AV*)PL_regex_pad[0]); \
 155             cPMOPx(o)->op_pmoffset = SvIV(repointer); \
 156             SvREPADTMP_off(repointer); \
 157             sv_setiv(repointer,PTR2IV(rx)); \
 158         } else { \
 159             repointer = newSViv(PTR2IV(rx)); \
 160             av_push(PL_regex_padav,SvREFCNT_inc(repointer)); \
 161             cPMOPx(o)->op_pmoffset = av_len(PL_regex_padav); \
 162             PL_regex_pad = AvARRAY(PL_regex_padav); \
 163         } \
 164     } STMT_END
 165
 166 #else
 167 #define BSET_pregcomp(o, arg) \
 168     STMT_START { \
 169         PM_SETRE(((PMOP*)o), (arg ? \
 170              CALLREGCOMP(aTHX_ arg, arg + bstate->bs_pv.xpv_cur, cPMOPx(o)): \
 171              Null(REGEXP*))); \
 172     } STMT_END
 173
 174 #endif /* USE_THREADS */
 175
 176
 177 #define BSET_newsv(sv, arg)                             \
 178             switch(arg) {                               \
 179             case SVt_PVAV:                              \
 180                 sv = (SV*)newAV();                      \
 181                 break;                                  \
 182             case SVt_PVHV:                              \
 183                 sv = (SV*)newHV();                      \
 184                 break;                                  \
 185             default:                                    \
 186                 sv = NEWSV(0,0);                        \
 187                 SvUPGRADE(sv, (arg));                   \
 188             }
 189 #define BSET_newsvx(sv, arg) STMT_START {               \
 190             BSET_newsv(sv, arg &  SVTYPEMASK);          \
 191             SvFLAGS(sv) = arg;                          \
 192             BSET_OBJ_STOREX(sv);                        \
 193         } STMT_END
 194
 195 #define BSET_newop(o, arg)      NewOpSz(666, o, arg)
 196 #define BSET_newopx(o, arg) STMT_START {        \
 197         register int sz = arg & 0x7f;           \
 198         register OP* newop;                     \
 199         BSET_newop(newop, sz);                  \
 200         /* newop->op_next = o; XXX */           \
 201         o = newop;                              \
 202         arg >>=7;                               \
 203         BSET_op_type(o, arg);                   \
 204         BSET_OBJ_STOREX(o);                     \
 205     } STMT_END
 206
 207 #define BSET_newopn(o, arg) STMT_START {        \
 208         OP *oldop = o;                          \
 209         BSET_newop(o, arg);                     \
 210         oldop->op_next = o;                     \
 211     } STMT_END
 212
 213 #define BSET_ret(foo) STMT_START {              \
 214         Safefree(bstate->bs_obj_list);          \
 215         return 0;                               \
 216     } STMT_END
 217
 218 #define BSET_op_pmstashpv(op, arg)      PmopSTASHPV_set(op, arg)
 219
 220 /*
 221  * stolen from toke.c: better if that was a function.
 222  * in toke.c there are also #ifdefs for dosish systems and i/o layers
 223  */
 224
 225 #if defined(HAS_FCNTL) && defined(F_SETFD)
 226 #define set_clonex(fp)                          \
 227         STMT_START {                            \
 228             int fd = PerlIO_fileno(fp);         \
 229             fcntl(fd,F_SETFD,fd >= 3);          \
 230         } STMT_END
 231 #else
 232 #define set_clonex(fp)
 233 #endif
 234
 235 #define BSET_data(dummy,arg)                                            \
 236     STMT_START {                                                        \
 237         GV *gv;                                                         \
 238         char *pname = "main";                                           \
 239         if (arg == 'D')                                                 \
 240             pname = HvNAME(PL_curstash ? PL_curstash : PL_defstash);    \
 241         gv = gv_fetchpv(Perl_form(aTHX_ "%s::DATA", pname), TRUE, SVt_PVIO);\
 242         GvMULTI_on(gv);                                                 \
 243         if (!GvIO(gv))                                                  \
 244             GvIOp(gv) = newIO();                                        \
 245         IoIFP(GvIOp(gv)) = PL_rsfp;                                     \
 246         set_clonex(PL_rsfp);                                            \
 247         /* Mark this internal pseudo-handle as clean */                 \
 248         IoFLAGS(GvIOp(gv)) |= IOf_UNTAINT;                              \
 249         if (PL_preprocess)                                              \
 250             IoTYPE(GvIOp(gv)) = IoTYPE_PIPE;                            \
 251         else if ((PerlIO*)PL_rsfp == PerlIO_stdin())                    \
 252             IoTYPE(GvIOp(gv)) = IoTYPE_STD;                             \
 253         else                                                            \
 254             IoTYPE(GvIOp(gv)) = IoTYPE_RDONLY;                          \
 255         Safefree(bstate->bs_obj_list);                                  \
 256         return 1;                                                       \
 257     } STMT_END
 258
 259 /* stolen from op.c */
 260 #define BSET_load_glob(foo, gv)                                         \
 261     STMT_START {                                                        \
 262         GV *glob_gv;                                                    \
 263         ENTER;                                                          \
 264         Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,                   \
 265                 newSVpvn("File::Glob", 10), Nullsv, Nullsv, Nullsv);    \
 266         glob_gv = gv_fetchpv("File::Glob::csh_glob", FALSE, SVt_PVCV);  \
 267         GvCV(gv) = GvCV(glob_gv);                                       \
 268         SvREFCNT_inc((SV*)GvCV(gv));                                    \
 269         GvIMPORTED_CV_on(gv);                                           \
 270         LEAVE;                                                          \
 271     } STMT_END
 272
 273 /*
 274  * Kludge special-case workaround for OP_MAPSTART
 275  * which needs the ppaddr for OP_GREPSTART. Blech.
 276  */
 277 #define BSET_op_type(o, arg) STMT_START {       \
 278         o->op_type = arg;                       \
 279         if (arg == OP_MAPSTART)                 \
 280             arg = OP_GREPSTART;                 \
 281         o->op_ppaddr = PL_ppaddr[arg];          \
 282     } STMT_END
 283 #define BSET_op_ppaddr(o, arg) Perl_croak(aTHX_ "op_ppaddr not yet implemented")
 284 #define BSET_curpad(pad, arg) STMT_START {      \
 285         PL_comppad = (AV *)arg;                 \
 286         pad = AvARRAY(arg);                     \
 287     } STMT_END
 288
 289 #ifdef USE_ITHREADS
 290 #define BSET_cop_file(cop, arg)         CopFILE_set(cop,arg)
 291 #define BSET_cop_stashpv(cop, arg)      CopSTASHPV_set(cop,arg)
 292 #else
 293 /* this works now that Sarathy's changed the CopFILE_set macro to do the SvREFCNT_inc()
 294         -- BKS 6-2-2000 */
 295 /* that really meant the actual CopFILEGV_set */
 296 #define BSET_cop_filegv(cop, arg)       CopFILEGV_set(cop,arg)
 297 #define BSET_cop_stash(cop,arg)         CopSTASH_set(cop,(HV*)arg)
 298 #endif
 299
 300 /* this is simply stolen from the code in newATTRSUB() */
 301 #define BSET_push_begin(ary,cv)                         \
 302         STMT_START {                                    \
 303             I32 oldscope = PL_scopestack_ix;            \
 304             ENTER;                                      \
 305             SAVECOPFILE(&PL_compiling);                 \
 306             SAVECOPLINE(&PL_compiling);                 \
 307             if (!PL_beginav)                            \
 308                 PL_beginav = newAV();                   \
 309             av_push(PL_beginav, (SV*)cv);               \
 310             GvCV(CvGV(cv)) = 0;               /* cv has been hijacked */\
 311             call_list(oldscope, PL_beginav);            \
 312             PL_curcop = &PL_compiling;                  \
 313             PL_compiling.op_private = (U8)(PL_hints & HINT_PRIVATE_MASK);\
 314             LEAVE;                                      \
 315         } STMT_END
 316 #define BSET_push_init(ary,cv)                          \
 317         STMT_START {                                    \
 318             av_unshift((PL_initav ? PL_initav :         \
 319                 (PL_initav = newAV(), PL_initav)), 1);  \
 320             av_store(PL_initav, 0, cv);                 \
 321         } STMT_END
 322 #define BSET_push_end(ary,cv)                           \
 323         STMT_START {                                    \
 324             av_unshift((PL_endav ? PL_endav :           \
 325             (PL_endav = newAV(), PL_endav)), 1);        \
 326             av_store(PL_endav, 0, cv);                  \
 327         } STMT_END
 328 #define BSET_OBJ_STORE(obj, ix)                 \
 329         ((I32)ix > bstate->bs_obj_list_fill ?   \
 330          bset_obj_store(aTHX_ bstate, obj, (I32)ix) : \
 331          (bstate->bs_obj_list[ix] = obj),       \
 332          bstate->bs_ix = ix+1)
 333 #define BSET_OBJ_STOREX(obj)                    \
 334         (bstate->bs_ix > bstate->bs_obj_list_fill ?     \
 335          bset_obj_store(aTHX_ bstate, obj, bstate->bs_ix) : \
 336          (bstate->bs_obj_list[bstate->bs_ix] = obj),    \
 337          bstate->bs_ix++)
 338
 339 #define BSET_signal(cv, name)                                           \
 340         mg_set(*hv_store(GvHV(gv_fetchpv("SIG", TRUE, SVt_PVHV)),       \
 341                 name, strlen(name), cv, 0))
 342
 343 /* NOTE: the bytecode header only sanity-checks the bytecode. If a script cares about
 344  * what version of Perl it's being called under, it should do a 'use 5.006_001' or
 345  * equivalent. However, since the header includes checks requiring an exact match in
 346  * ByteLoader versions (we can't guarantee forward compatibility), you don't
 347  * need to specify one:
 348  *      use ByteLoader;
 349  * is all you need.
 350  *      -- BKS, June 2000
 351 */
 352
 353 #define HEADER_FAIL(f)  \
 354         Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f)
 355 #define HEADER_FAIL1(f, arg1)   \
 356         Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1)
 357 #define HEADER_FAIL2(f, arg1, arg2)     \
 358         Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1, arg2)
 359
 360 #define BYTECODE_HEADER_CHECK                                   \
 361         STMT_START {                                            \
 362             U32 sz = 0;                                         \
 363             strconst str;                                       \
 364                                                                 \
 365             BGET_U32(sz); /* Magic: 'PLBC' */                   \
 366             if (sz != 0x43424c50) {                             \
 367                 HEADER_FAIL1("bad magic (want 0x43424c50, got %#x)", (int)sz);          \
 368             }                                                   \
 369             BGET_strconst(str); /* archname */                  \
 370             if (strNE(str, ARCHNAME)) {                         \
 371                 HEADER_FAIL2("wrong architecture (want %s, you have %s)",str,ARCHNAME); \
 372             }                                                   \
 373             BGET_strconst(str); /* ByteLoader version */        \
 374             if (strNE(str, VERSION)) {                          \
 375                 HEADER_FAIL2("mismatched ByteLoader versions (want %s, you have %s)",   \
 376                         str, VERSION);                          \
 377             }                                                   \
 378             BGET_U32(sz); /* ivsize */                          \
 379             if (sz != IVSIZE) {                                 \
 380                 HEADER_FAIL("different IVSIZE");                \
 381             }                                                   \
 382             BGET_U32(sz); /* ptrsize */                         \
 383             if (sz != PTRSIZE) {                                \
 384                 HEADER_FAIL("different PTRSIZE");               \
 385             }                                                   \
 386         } STMT_END