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 IV IV64;
   9
  10 #define BGET_FREAD(argp, len, nelem)    \
  11          PerlIO_read(PL_rsfp,(char*)(argp),(len)*(nelem))
  12 #define BGET_FGETC() PerlIO_getc(PL_rsfp)
  13
  14 #define BGET_U32(arg)   \
  15         BGET_FREAD(&arg, sizeof(U32), 1)
  16 #define BGET_I32(arg)   \
  17         BGET_FREAD(&arg, sizeof(I32), 1)
  18 #define BGET_U16(arg)   \
  19         BGET_FREAD(&arg, sizeof(U16), 1)
  20 #define BGET_U8(arg)    arg = BGET_FGETC()
  21
  22 #define BGET_PV(arg)    STMT_START {                                    \
  23         BGET_U32(arg);                                                  \
  24         if (arg) {                                                      \
  25             New(666, bytecode_pv.xpv_pv, arg, char);                    \
  26             PerlIO_read(PL_rsfp, (void*)bytecode_pv.xpv_pv, arg);       \
  27             bytecode_pv.xpv_len = arg;                                  \
  28             bytecode_pv.xpv_cur = arg - 1;                              \
  29         } else {                                                        \
  30             bytecode_pv.xpv_pv = 0;                                     \
  31             bytecode_pv.xpv_len = 0;                                    \
  32             bytecode_pv.xpv_cur = 0;                                    \
  33         }                                                               \
  34     } STMT_END
  35
  36 #ifdef BYTELOADER_LOG_COMMENTS
  37 #  define BGET_comment_t(arg) \
  38     STMT_START {                                                        \
  39         char buf[1024];                                                 \
  40         int i = 0;                                                      \
  41         do {                                                            \
  42             arg = BGET_FGETC();                                         \
  43             buf[i++] = (char)arg;                                       \
  44         } while (arg != '\n' && arg != EOF);                            \
  45         buf[i] = '\0';                                                  \
  46         PerlIO_printf(PerlIO_stderr(), "%s", buf);                      \
  47     } STMT_END
  48 #else
  49 #  define BGET_comment_t(arg) \
  50         do { arg = BGET_FGETC(); } while (arg != '\n' && arg != EOF)
  51 #endif
  52
  53 /*
  54  * In the following, sizeof(IV)*4 is just a way of encoding 32 on 64-bit-IV
  55  * machines such that 32-bit machine compilers don't whine about the shift
  56  * count being too high even though the code is never reached there.
  57  */
  58 #define BGET_IV64(arg) STMT_START {                     \
  59         U32 hi, lo;                                     \
  60         BGET_U32(hi);                                   \
  61         BGET_U32(lo);                                   \
  62         if (sizeof(IV) == 8)                            \
  63             arg = ((IV)hi << (sizeof(IV)*4) | (IV)lo);  \
  64         else if (((I32)hi == -1 && (I32)lo < 0)         \
  65                  || ((I32)hi == 0 && (I32)lo >= 0)) {   \
  66             arg = (I32)lo;                              \
  67         }                                               \
  68         else {                                          \
  69             bytecode_iv_overflows++;                    \
  70             arg = 0;                                    \
  71         }                                               \
  72     } STMT_END
  73
  74 #define BGET_op_tr_array(arg) do {                      \
  75         unsigned short *ary;                            \
  76         int i;                                          \
  77         New(666, ary, 256, unsigned short);             \
  78         BGET_FREAD(ary, sizeof(unsigned short), 256);   \
  79         arg = (char *) ary;                             \
  80     } while (0)
  81
  82 #define BGET_pvcontents(arg)    arg = bytecode_pv.xpv_pv
  83 #define BGET_strconst(arg) STMT_START { \
  84         for (arg = PL_tokenbuf; (*arg = BGET_FGETC()); arg++) /* nothing */; \
  85         arg = PL_tokenbuf;                      \
  86     } STMT_END
  87
  88 #define BGET_NV(arg) STMT_START {       \
  89         char *str;                      \
  90         BGET_strconst(str);             \
  91         arg = Atof(str);                \
  92     } STMT_END
  93
  94 #define BGET_objindex(arg, type) STMT_START {   \
  95         U32 ix;                                 \
  96         BGET_U32(ix);                           \
  97         arg = (type)bytecode_obj_list[ix];              \
  98     } STMT_END
  99 #define BGET_svindex(arg) BGET_objindex(arg, svindex)
 100 #define BGET_opindex(arg) BGET_objindex(arg, opindex)
 101
 102 #define BSET_ldspecsv(sv, arg) sv = specialsv_list[arg]
 103
 104 #define BSET_sv_refcnt_add(svrefcnt, arg)       svrefcnt += arg
 105 #define BSET_gp_refcnt_add(gprefcnt, arg)       gprefcnt += arg
 106 #define BSET_gp_share(sv, arg) STMT_START {     \
 107         gp_free((GV*)sv);                       \
 108         GvGP(sv) = GvGP(arg);                   \
 109     } STMT_END
 110
 111 #define BSET_gv_fetchpv(sv, arg)        sv = (SV*)gv_fetchpv(arg, TRUE, SVt_PV)
 112 #define BSET_gv_stashpv(sv, arg)        sv = (SV*)gv_stashpv(arg, TRUE)
 113 #define BSET_sv_magic(sv, arg)          sv_magic(sv, Nullsv, arg, 0, 0)
 114 #define BSET_mg_pv(mg, arg)     mg->mg_ptr = arg; mg->mg_len = bytecode_pv.xpv_cur
 115 #define BSET_sv_upgrade(sv, arg)        (void)SvUPGRADE(sv, arg)
 116 #define BSET_xpv(sv)    do {    \
 117         SvPV_set(sv, bytecode_pv.xpv_pv);       \
 118         SvCUR_set(sv, bytecode_pv.xpv_cur);     \
 119         SvLEN_set(sv, bytecode_pv.xpv_len);     \
 120     } while (0)
 121 #define BSET_av_extend(sv, arg) av_extend((AV*)sv, arg)
 122
 123 #define BSET_av_push(sv, arg)   av_push((AV*)sv, arg)
 124 #define BSET_hv_store(sv, arg)  \
 125         hv_store((HV*)sv, bytecode_pv.xpv_pv, bytecode_pv.xpv_cur, arg, 0)
 126 #define BSET_pv_free(pv)        Safefree(pv.xpv_pv)
 127 #define BSET_pregcomp(o, arg) \
 128         ((PMOP*)o)->op_pmregexp = arg ? \
 129                 CALLREGCOMP(aTHX_ arg, arg + bytecode_pv.xpv_cur, ((PMOP*)o)) : 0
 130 #define BSET_newsv(sv, arg)                             \
 131         STMT_START {                                    \
 132             sv = (arg == SVt_PVAV ? (SV*)newAV() :      \
 133                   arg == SVt_PVHV ? (SV*)newHV() :      \
 134                   NEWSV(666,0));                        \
 135             SvUPGRADE(sv, arg);                         \
 136         } STMT_END
 137 #define BSET_newop(o, arg)      ((o = (OP*)safemalloc(optype_size[arg])), \
 138                                  memzero((char*)o,optype_size[arg]))
 139 #define BSET_newopn(o, arg) STMT_START {        \
 140         OP *oldop = o;                          \
 141         BSET_newop(o, arg);                     \
 142         oldop->op_next = o;                     \
 143     } STMT_END
 144
 145 #define BSET_ret(foo) STMT_START {                      \
 146         if (bytecode_obj_list)                          \
 147             Safefree(bytecode_obj_list);                \
 148         LEAVE;                                          \
 149         return;                                         \
 150     } STMT_END
 151
 152 /*
 153  * Kludge special-case workaround for OP_MAPSTART
 154  * which needs the ppaddr for OP_GREPSTART. Blech.
 155  */
 156 #define BSET_op_type(o, arg) STMT_START {       \
 157         o->op_type = arg;                       \
 158         if (arg == OP_MAPSTART)                 \
 159             arg = OP_GREPSTART;                 \
 160         o->op_ppaddr = PL_ppaddr[arg];          \
 161     } STMT_END
 162 #define BSET_op_ppaddr(o, arg) Perl_croak(aTHX_ "op_ppaddr not yet implemented")
 163 #define BSET_curpad(pad, arg) STMT_START {      \
 164         PL_comppad = (AV *)arg;                 \
 165         pad = AvARRAY(arg);                     \
 166     } STMT_END
 167 /* this works now that Sarathy's changed the CopFILE_set macro to do the SvREFCNT_inc()
 168         -- BKS 6-2-2000 */
 169 #define BSET_cop_file(cop, arg)         CopFILE_set(cop,arg)
 170 #define BSET_cop_line(cop, arg)         CopLINE_set(cop,arg)
 171 #define BSET_cop_stashpv(cop, arg)      CopSTASHPV_set(cop,arg)
 172
 173 /* this is simply stolen from the code in newATTRSUB() */
 174 #define BSET_push_begin(ary,cv)                         \
 175         STMT_START {                                    \
 176             I32 oldscope = PL_scopestack_ix;            \
 177             ENTER;                                      \
 178             SAVECOPFILE(&PL_compiling);                 \
 179             SAVECOPLINE(&PL_compiling);                 \
 180             save_svref(&PL_rs);                         \
 181             sv_setsv(PL_rs, PL_nrs);                    \
 182             if (!PL_beginav)                            \
 183                 PL_beginav = newAV();                   \
 184             av_push(PL_beginav, cv);                    \
 185             call_list(oldscope, PL_beginav);            \
 186             PL_curcop = &PL_compiling;                  \
 187             PL_compiling.op_private = PL_hints;         \
 188             LEAVE;                                      \
 189         } STMT_END
 190 #define BSET_push_init(ary,cv)                                                          \
 191         STMT_START {                                                                    \
 192             av_unshift((PL_initav ? PL_initav : (PL_initav = newAV(), PL_initav)), 1);  \
 193             av_store(PL_initav, 0, cv);                                                 \
 194         } STMT_END
 195 #define BSET_push_end(ary,cv)                                                                   \
 196         STMT_START {                                                                    \
 197             av_unshift((PL_endav ? PL_endav : (PL_endav = newAV(), PL_endav)), 1);      \
 198             av_store(PL_endav, 0, cv);                                                  \
 199         } STMT_END
 200 #define BSET_OBJ_STORE(obj, ix)                 \
 201         (I32)ix > bytecode_obj_list_fill ?      \
 202         bset_obj_store(aTHXo_ obj, (I32)ix) : (bytecode_obj_list[ix] = obj)
 203 #define BYTECODE_HEADER_CHECK                           \
 204         STMT_START {                                    \
 205             U32 sz;                                     \
 206             strconst str;                               \
 207             char *badpart;                              \
 208                                                         \
 209             BGET_U32(sz); /* Magic: 'PLBC' */           \
 210             if (sz != 0x43424c50) {                     \
 211                 badpart = "bad magic";                  \
 212                 goto bch_fail;                          \
 213             }                                           \
 214             BGET_strconst(str); /* archname */          \
 215             if (strNE(str, ARCHNAME)) {                 \
 216                 badpart = "wrong architecture";         \
 217                 goto bch_fail;                          \
 218             }                                           \
 219             BGET_U32(sz); /* ivsize */                  \
 220             if (sz != IVSIZE) {                         \
 221                 badpart = "different IVSIZE";           \
 222                 goto bch_fail;                          \
 223             }                                           \
 224             BGET_U32(sz); /* ptrsize */                 \
 225             if (sz != PTRSIZE) {                        \
 226                 badpart = "different PTRSIZE";          \
 227                 goto bch_fail;                          \
 228             }                                           \
 229             BGET_strconst(str); /* byteorder */         \
 230             if (strNE(str, STRINGIFY(BYTEORDER))) {     \
 231                 badpart = "different byteorder";        \
 232         bch_fail:                                       \
 233                 Perl_croak(aTHX_ "Invalid bytecode for this architecture: %s\n",        \
 234                                 badpart);               \
 235             }                                           \
 236         } STMT_END