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 typedef IV IV64;
  10
  11 #define BGET_FREAD(argp, len, nelem)    \
  12          bl_read(bstate->bs_fdata,(char*)(argp),(len),(nelem))
  13 #define BGET_FGETC() bl_getc(bstate->bs_fdata)
  14
  15 #define BGET_U32(arg)   \
  16         BGET_FREAD(&arg, sizeof(U32), 1)
  17 #define BGET_I32(arg)   \
  18         BGET_FREAD(&arg, sizeof(I32), 1)
  19 #define BGET_U16(arg)   \
  20         BGET_FREAD(&arg, sizeof(U16), 1)
  21 #define BGET_U8(arg)    arg = BGET_FGETC()
  22
  23 #define BGET_PV(arg)    STMT_START {                                    \
  24         BGET_U32(arg);                                                  \
  25         if (arg) {                                                      \
  26             New(666, bstate->bs_pv.xpv_pv, arg, char);                  \
  27             bl_read(bstate->bs_fdata, (void*)bstate->bs_pv.xpv_pv, arg, 1);     \
  28             bstate->bs_pv.xpv_len = arg;                                \
  29             bstate->bs_pv.xpv_cur = arg - 1;                            \
  30         } else {                                                        \
  31             bstate->bs_pv.xpv_pv = 0;                                   \
  32             bstate->bs_pv.xpv_len = 0;                                  \
  33             bstate->bs_pv.xpv_cur = 0;                                  \
  34         }                                                               \
  35     } STMT_END
  36
  37 #ifdef BYTELOADER_LOG_COMMENTS
  38 #  define BGET_comment_t(arg) \
  39     STMT_START {                                                        \
  40         char buf[1024];                                                 \
  41         int i = 0;                                                      \
  42         do {                                                            \
  43             arg = BGET_FGETC();                                         \
  44             buf[i++] = (char)arg;                                       \
  45         } while (arg != '\n' && arg != EOF);                            \
  46         buf[i] = '\0';                                                  \
  47         PerlIO_printf(PerlIO_stderr(), "%s", buf);                      \
  48     } STMT_END
  49 #else
  50 #  define BGET_comment_t(arg) \
  51         do { arg = BGET_FGETC(); } while (arg != '\n' && arg != EOF)
  52 #endif
  53
  54 /*
  55  * In the following, sizeof(IV)*4 is just a way of encoding 32 on 64-bit-IV
  56  * machines such that 32-bit machine compilers don't whine about the shift
  57  * count being too high even though the code is never reached there.
  58  */
  59 #define BGET_IV64(arg) STMT_START {                     \
  60         U32 hi, lo;                                     \
  61         BGET_U32(hi);                                   \
  62         BGET_U32(lo);                                   \
  63         if (sizeof(IV) == 8)                            \
  64             arg = ((IV)hi << (sizeof(IV)*4) | (IV)lo);  \
  65         else if (((I32)hi == -1 && (I32)lo < 0)         \
  66                  || ((I32)hi == 0 && (I32)lo >= 0)) {   \
  67             arg = (I32)lo;                              \
  68         }                                               \
  69         else {                                          \
  70             bstate->bs_iv_overflows++;                  \
  71             arg = 0;                                    \
  72         }                                               \
  73     } STMT_END
  74
  75 #if IVSIZE == 4
  76 #   define BGET_IV(arg) BGET_I32(arg)
  77 #else
  78 #   if IVSIZE == 8
  79 #       define BGET_IV(arg) BGET_IV64(arg)
  80 #   endif
  81 #endif
  82
  83 #define BGET_op_tr_array(arg) do {                      \
  84         unsigned short *ary;                            \
  85         New(666, ary, 256, unsigned short);             \
  86         BGET_FREAD(ary, sizeof(unsigned short), 256);   \
  87         arg = (char *) ary;                             \
  88     } while (0)
  89
  90 #define BGET_pvcontents(arg)    arg = bstate->bs_pv.xpv_pv
  91 #define BGET_strconst(arg) STMT_START { \
  92         for (arg = PL_tokenbuf; (*arg = BGET_FGETC()); arg++) /* nothing */; \
  93         arg = PL_tokenbuf;                      \
  94     } STMT_END
  95
  96 #define BGET_NV(arg) STMT_START {       \
  97         char *str;                      \
  98         BGET_strconst(str);             \
  99         arg = Atof(str);                \
 100     } STMT_END
 101
 102 #define BGET_objindex(arg, type) STMT_START {   \
 103         BGET_U32(ix);                           \
 104         arg = (type)bstate->bs_obj_list[ix];    \
 105     } STMT_END
 106 #define BGET_svindex(arg) BGET_objindex(arg, svindex)
 107 #define BGET_opindex(arg) BGET_objindex(arg, opindex)
 108 #define BGET_pvindex(arg) STMT_START {                  \
 109         BGET_objindex(arg, pvindex);                    \
 110         arg = arg ? savepv(arg) : arg;                  \
 111     } STMT_END
 112
 113 #define BSET_ldspecsv(sv, arg) sv = specialsv_list[arg]
 114 #define BSET_stpv(pv, arg) STMT_START {         \
 115         BSET_OBJ_STORE(pv, arg);                \
 116         SAVEFREEPV(pv);                         \
 117     } STMT_END
 118
 119 #define BSET_sv_refcnt_add(svrefcnt, arg)       svrefcnt += arg
 120 #define BSET_gp_refcnt_add(gprefcnt, arg)       gprefcnt += arg
 121 #define BSET_gp_share(sv, arg) STMT_START {     \
 122         gp_free((GV*)sv);                       \
 123         GvGP(sv) = GvGP(arg);                   \
 124     } STMT_END
 125
 126 #define BSET_gv_fetchpv(sv, arg)        sv = (SV*)gv_fetchpv(arg, TRUE, SVt_PV)
 127 #define BSET_gv_stashpv(sv, arg)        sv = (SV*)gv_stashpv(arg, TRUE)
 128 #define BSET_sv_magic(sv, arg)          sv_magic(sv, Nullsv, arg, 0, 0)
 129 #define BSET_mg_pv(mg, arg)     mg->mg_ptr = arg; mg->mg_len = bstate->bs_pv.xpv_cur
 130 #define BSET_sv_upgrade(sv, arg)        (void)SvUPGRADE(sv, arg)
 131 #define BSET_xpv(sv)    do {    \
 132         SvPV_set(sv, bstate->bs_pv.xpv_pv);     \
 133         SvCUR_set(sv, bstate->bs_pv.xpv_cur);   \
 134         SvLEN_set(sv, bstate->bs_pv.xpv_len);   \
 135     } while (0)
 136 #define BSET_av_extend(sv, arg) av_extend((AV*)sv, arg)
 137
 138 #define BSET_av_push(sv, arg)   av_push((AV*)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 #define BSET_pregcomp(o, arg) \
 143         (PM_SETRE(((PMOP*)o), (arg ? \
 144                 CALLREGCOMP(aTHX_ arg, arg + bstate->bs_pv.xpv_cur, ((PMOP*)o)) : 0)))
 145 #define BSET_newsv(sv, arg)                             \
 146         STMT_START {                                    \
 147             sv = (arg == SVt_PVAV ? (SV*)newAV() :      \
 148                   arg == SVt_PVHV ? (SV*)newHV() :      \
 149                   NEWSV(666,0));                        \
 150             SvUPGRADE(sv, arg);                         \
 151         } STMT_END
 152 #define BSET_newop(o, arg)      ((o = (OP*)safemalloc(optype_size[arg])), \
 153                                  memzero((char*)o,optype_size[arg]))
 154 #define BSET_newopn(o, arg) STMT_START {        \
 155         OP *oldop = o;                          \
 156         BSET_newop(o, arg);                     \
 157         oldop->op_next = o;                     \
 158     } STMT_END
 159
 160 #define BSET_ret(foo) STMT_START {                      \
 161         Safefree(bstate->bs_obj_list);                  \
 162         return;                                         \
 163     } STMT_END
 164
 165 /*
 166  * Kludge special-case workaround for OP_MAPSTART
 167  * which needs the ppaddr for OP_GREPSTART. Blech.
 168  */
 169 #define BSET_op_type(o, arg) STMT_START {       \
 170         o->op_type = arg;                       \
 171         if (arg == OP_MAPSTART)                 \
 172             arg = OP_GREPSTART;                 \
 173         o->op_ppaddr = PL_ppaddr[arg];          \
 174     } STMT_END
 175 #define BSET_op_ppaddr(o, arg) Perl_croak(aTHX_ "op_ppaddr not yet implemented")
 176 #define BSET_curpad(pad, arg) STMT_START {      \
 177         PL_comppad = (AV *)arg;                 \
 178         pad = AvARRAY(arg);                     \
 179     } STMT_END
 180 /* this works now that Sarathy's changed the CopFILE_set macro to do the SvREFCNT_inc()
 181         -- BKS 6-2-2000 */
 182 #define BSET_cop_file(cop, arg)         CopFILE_set(cop,arg)
 183 #define BSET_cop_line(cop, arg)         CopLINE_set(cop,arg)
 184 #define BSET_cop_stashpv(cop, arg)      CopSTASHPV_set(cop,arg)
 185
 186 /* this is simply stolen from the code in newATTRSUB() */
 187 #define BSET_push_begin(ary,cv)                         \
 188         STMT_START {                                    \
 189             I32 oldscope = PL_scopestack_ix;            \
 190             ENTER;                                      \
 191             SAVECOPFILE(&PL_compiling);                 \
 192             SAVECOPLINE(&PL_compiling);                 \
 193             if (!PL_beginav)                            \
 194                 PL_beginav = newAV();                   \
 195             av_push(PL_beginav, cv);                    \
 196             call_list(oldscope, PL_beginav);            \
 197             PL_curcop = &PL_compiling;                  \
 198             PL_compiling.op_private = PL_hints;         \
 199             LEAVE;                                      \
 200         } STMT_END
 201 #define BSET_push_init(ary,cv)                                                          \
 202         STMT_START {                                                                    \
 203             av_unshift((PL_initav ? PL_initav : (PL_initav = newAV(), PL_initav)), 1);  \
 204             av_store(PL_initav, 0, cv);                                                 \
 205         } STMT_END
 206 #define BSET_push_end(ary,cv)                                                                   \
 207         STMT_START {                                                                    \
 208             av_unshift((PL_endav ? PL_endav : (PL_endav = newAV(), PL_endav)), 1);      \
 209             av_store(PL_endav, 0, cv);                                                  \
 210         } STMT_END
 211 #define BSET_OBJ_STORE(obj, ix)                 \
 212         (I32)ix > bstate->bs_obj_list_fill ?    \
 213         bset_obj_store(aTHX_ bstate, obj, (I32)ix) : (bstate->bs_obj_list[ix] = obj)
 214
 215 /* NOTE: the bytecode header only sanity-checks the bytecode. If a script cares about
 216  * what version of Perl it's being called under, it should do a 'use 5.006_001' or
 217  * equivalent. However, since the header includes checks requiring an exact match in
 218  * ByteLoader versions (we can't guarantee forward compatibility), you don't
 219  * need to specify one:
 220  *      use ByteLoader;
 221  * is all you need.
 222  *      -- BKS, June 2000
 223 */
 224
 225 #define HEADER_FAIL(f)  \
 226         Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f)
 227 #define HEADER_FAIL1(f, arg1)   \
 228         Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1)
 229 #define HEADER_FAIL2(f, arg1, arg2)     \
 230         Perl_croak(aTHX_ "Invalid bytecode for this architecture: " f, arg1, arg2)
 231
 232 #define BYTECODE_HEADER_CHECK                                   \
 233         STMT_START {                                            \
 234             U32 sz = 0;                                         \
 235             strconst str;                                       \
 236                                                                 \
 237             BGET_U32(sz); /* Magic: 'PLBC' */                   \
 238             if (sz != 0x43424c50) {                             \
 239                 HEADER_FAIL1("bad magic (want 0x43424c50, got %#x)", (int)sz);          \
 240             }                                                   \
 241             BGET_strconst(str); /* archname */                  \
 242             if (strNE(str, ARCHNAME)) {                         \
 243                 HEADER_FAIL2("wrong architecture (want %s, you have %s)",str,ARCHNAME); \
 244             }                                                   \
 245             BGET_strconst(str); /* ByteLoader version */        \
 246             if (strNE(str, VERSION)) {                          \
 247                 HEADER_FAIL2("mismatched ByteLoader versions (want %s, you have %s)",   \
 248                         str, VERSION);                          \
 249             }                                                   \
 250             BGET_U32(sz); /* ivsize */                          \
 251             if (sz != IVSIZE) {                                 \
 252                 HEADER_FAIL("different IVSIZE");                \
 253             }                                                   \
 254             BGET_U32(sz); /* ptrsize */                         \
 255             if (sz != PTRSIZE) {                                \
 256                 HEADER_FAIL("different PTRSIZE");               \
 257             }                                                   \
 258             BGET_strconst(str); /* byteorder */                 \
 259             if (strNE(str, STRINGIFY(BYTEORDER))) {             \
 260                 HEADER_FAIL("different byteorder");     \
 261             }                                                   \
 262         } STMT_END