Mercurial > projects > ddmd
annotate dmd/codegen/Util.d @ 5:63623152e82a
Fixed memory corruption bug which was introduced when attempting to restore GC functionality
| author | dkoroskin <> |
|---|---|
| date | Tue, 08 Dec 2009 21:39:17 +0300 |
| parents | d706d958e4e8 |
| children | fd4acc376c45 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.codegen.Util; |
| 2 | |
| 3 import dmd.Loc; | |
| 4 import dmd.IRState; | |
| 5 import dmd.Type; | |
| 6 import dmd.Array; | |
| 7 import dmd.Dsymbol; | |
| 8 import dmd.FuncDeclaration; | |
| 9 import dmd.Identifier; | |
| 10 import dmd.RET; | |
| 11 import dmd.TY; | |
| 12 import dmd.LINK; | |
| 13 import dmd.Expression; | |
| 14 import dmd.Argument; | |
| 15 import dmd.STC; | |
| 16 import dmd.Global; | |
| 17 import dmd.InterfaceDeclaration; | |
| 18 import dmd.AggregateDeclaration; | |
| 19 import dmd.AttribDeclaration; | |
| 20 import dmd.TupleDeclaration; | |
| 21 import dmd.StructDeclaration; | |
| 22 import dmd.VarDeclaration; | |
| 23 import dmd.ClassDeclaration; | |
| 24 import dmd.TemplateMixin; | |
| 25 import dmd.TypedefDeclaration; | |
| 26 import dmd.ExpInitializer; | |
| 27 import dmd.TypeFunction; | |
| 28 import dmd.TypeStruct; | |
| 29 import dmd.TypeSArray; | |
| 30 import dmd.TOK; | |
| 31 import dmd.Util; | |
| 32 import dmd.LabelStatement; | |
| 33 import dmd.DsymbolExp; | |
| 34 import dmd.LabelDsymbol; | |
| 35 import dmd.backend.elem; | |
| 36 import dmd.backend.TYPE; | |
| 37 import dmd.backend.Util; | |
| 38 import dmd.backend.Classsym; | |
| 39 import dmd.backend.SC; | |
| 40 import dmd.backend.FL; | |
| 41 import dmd.backend.SFL; | |
| 42 import dmd.backend.STR; | |
| 43 import dmd.backend.TYM; | |
| 44 import dmd.backend.TF; | |
| 45 import dmd.backend.OPER; | |
| 46 import dmd.backend.mTYman; | |
| 47 import dmd.backend.TYFL; | |
| 48 import dmd.backend.mTY; | |
| 49 import dmd.backend.Symbol; | |
| 50 import dmd.backend.Blockx; | |
| 51 import dmd.backend.RTLSYM; | |
| 52 import dmd.backend.block; | |
| 53 import dmd.backend.LIST; | |
| 54 | |
| 55 import std.string; | |
| 56 import core.stdc.string; | |
|
5
63623152e82a
Fixed memory corruption bug which was introduced when attempting to restore GC functionality
dkoroskin <>
parents:
4
diff
changeset
|
57 import core.stdc.stdlib; |
| 0 | 58 |
| 4 | 59 import core.memory; |
| 2 | 60 |
| 0 | 61 /************************************ |
| 62 * Call a function. | |
| 63 */ | |
| 64 | |
| 65 elem* callfunc(Loc loc, | |
| 66 IRState* irs, | |
| 67 int directcall, // 1: don't do virtual call | |
| 68 Type tret, // return type | |
| 69 elem *ec, // evaluates to function address | |
| 70 Type ectype, // original type of ec | |
| 71 FuncDeclaration fd, // if !=null, this is the function being called | |
| 72 Type t, // TypeDelegate or TypeFunction for this function | |
| 73 elem* ehidden, // if !=null, this is the 'hidden' argument | |
| 74 Array arguments) | |
| 75 { | |
| 76 elem* ep; | |
| 77 elem* e; | |
| 78 elem* ethis = null; | |
| 79 elem* eside = null; | |
| 80 int i; | |
| 81 tym_t ty; | |
| 82 tym_t tyret; | |
| 83 RET retmethod; | |
| 84 int reverse; | |
| 85 TypeFunction tf; | |
| 86 OPER op; | |
| 87 | |
| 88 static if (false) { | |
| 89 printf("callfunc(directcall = %d, tret = '%s', ec = %p, fd = %p)\n", | |
| 90 directcall, tret.toChars(), ec, fd); | |
| 91 printf("ec: "); elem_print(ec); | |
| 92 if (fd) | |
| 93 printf("fd = '%s'\n", fd.toChars()); | |
| 94 } | |
| 95 | |
| 96 t = t.toBasetype(); | |
| 97 if (t.ty == TY.Tdelegate) | |
| 98 { | |
| 99 // A delegate consists of: | |
| 100 // { Object *this; Function *funcptr; } | |
| 101 assert(!fd); | |
| 102 assert(t.nextOf().ty == TY.Tfunction); | |
| 103 tf = cast(TypeFunction)t.nextOf(); | |
| 104 ethis = ec; | |
| 105 ec = el_same(ðis); | |
| 106 ethis = el_una(OPER.OP64_32, TYM.TYnptr, ethis); // get this | |
| 107 ec = array_toPtr(t, ec); // get funcptr | |
| 108 ec = el_una(OPER.OPind, tf.totym(), ec); | |
| 109 } | |
| 110 else | |
| 111 { | |
| 112 assert(t.ty == TY.Tfunction); | |
| 113 tf = cast(TypeFunction)t; | |
| 114 } | |
| 115 | |
| 116 retmethod = tf.retStyle(); | |
| 117 ty = ec.Ety; | |
| 118 if (fd) | |
| 119 ty = fd.toSymbol().Stype.Tty; | |
| 120 reverse = tyrevfunc(ty); | |
| 121 ep = null; | |
| 122 if (arguments) | |
| 123 { | |
| 124 // j=1 if _arguments[] is first argument | |
| 125 int j = (tf.linkage == LINK.LINKd && tf.varargs == 1); | |
| 126 | |
| 127 for (i = 0; i < arguments.dim ; i++) | |
| 128 { | |
| 129 Expression arg; | |
| 130 elem* ea; | |
| 131 | |
| 132 arg = cast(Expression)arguments.data[i]; | |
| 133 //printf("\targ[%d]: %s\n", i, arg.toChars()); | |
| 134 | |
| 135 size_t nparams = Argument.dim(tf.parameters); | |
| 136 if (i - j < nparams && i >= j) | |
| 137 { | |
| 138 Argument p = Argument.getNth(tf.parameters, i - j); | |
| 139 | |
| 140 if (p.storageClass & (STC.STCout | STC.STCref)) | |
| 141 { | |
| 142 // Convert argument to a pointer, | |
| 143 // use AddrExp.toElem() | |
| 144 Expression ae = arg.addressOf(null); | |
| 145 ea = ae.toElem(irs); | |
| 146 goto L1; | |
| 147 } | |
| 148 } | |
| 149 ea = arg.toElem(irs); | |
| 150 L1: | |
| 151 if (tybasic(ea.Ety) == TYM.TYstruct) | |
| 152 { | |
| 153 ea = el_una(OPER.OPstrpar, TYM.TYstruct, ea); | |
| 154 ea.Enumbytes = ea.E1.Enumbytes; | |
| 155 assert(ea.Enumbytes); | |
| 156 } | |
| 157 if (reverse) | |
| 158 ep = el_param(ep,ea); | |
| 159 else | |
| 160 ep = el_param(ea,ep); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 if (retmethod == RET.RETstack) | |
| 165 { | |
| 166 if (!ehidden) | |
| 167 { | |
| 168 // Don't have one, so create one | |
| 169 type* tt; | |
| 170 | |
| 171 if (tf.next.toBasetype().ty == TY.Tstruct) | |
| 172 tt = tf.next.toCtype(); | |
| 173 else | |
| 174 tt = type_fake(tf.next.totym()); | |
| 175 | |
| 176 Symbol* stmp = symbol_genauto(tt); | |
| 177 ehidden = el_ptr(stmp); | |
| 178 } | |
| 179 if ((global.params.isLinux || global.params.isOSX || global.params.isFreeBSD || global.params.isSolaris) && tf.linkage != LINK.LINKd) { | |
| 180 ; // ehidden goes last on Linux/OSX C++ | |
| 181 } else { | |
| 182 if (ep) | |
| 183 { | |
| 184 static if (false) { // BUG: implement | |
| 185 if (reverse && type_mangle(tfunc) == mTYman.mTYman_cpp) { | |
| 186 ep = el_param(ehidden,ep); | |
| 187 } else { | |
| 188 ep = el_param(ep,ehidden); | |
| 189 } | |
| 190 } else { | |
| 191 ep = el_param(ep,ehidden); | |
| 192 } | |
| 193 } | |
| 194 else | |
| 195 ep = ehidden; | |
| 196 ehidden = null; | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 if (fd && fd.isMember2()) | |
| 201 { | |
| 202 InterfaceDeclaration intd; | |
| 203 Symbol* sfunc; | |
| 204 AggregateDeclaration ad; | |
| 205 | |
| 206 ad = fd.isThis(); | |
| 207 if (ad) | |
| 208 { | |
| 209 ethis = ec; | |
| 210 if (ad.isStructDeclaration() && tybasic(ec.Ety) != TYM.TYnptr) | |
| 211 { | |
| 212 ethis = addressElem(ec, ectype); | |
| 213 } | |
| 214 } | |
| 215 else | |
| 216 { | |
| 217 // Evaluate ec for side effects | |
| 218 eside = ec; | |
| 219 } | |
| 220 sfunc = fd.toSymbol(); | |
| 221 | |
| 222 if (!fd.isVirtual() || | |
| 223 directcall || // BUG: fix | |
| 224 fd.isFinal()) | |
| 225 { | |
| 226 // make static call | |
| 227 ec = el_var(sfunc); | |
| 228 } | |
| 229 else | |
| 230 { | |
| 231 // make virtual call | |
| 232 elem* ev; | |
| 233 uint vindex; | |
| 234 | |
| 235 assert(ethis); | |
| 236 ev = el_same(ðis); | |
| 237 ev = el_una(OPER.OPind, TYM.TYnptr, ev); | |
| 238 vindex = fd.vtblIndex; | |
| 239 | |
| 240 // Build *(ev + vindex * 4) | |
| 241 ec = el_bin(OPER.OPadd, TYM.TYnptr, ev, el_long(TYM.TYint, vindex * 4)); | |
| 242 ec = el_una(OPER.OPind, TYM.TYnptr, ec); | |
| 243 ec = el_una(OPER.OPind, tybasic(sfunc.Stype.Tty), ec); | |
| 244 } | |
| 245 } | |
| 246 else if (fd && fd.isNested()) | |
| 247 { | |
| 248 assert(!ethis); | |
| 249 ethis = getEthis(Loc(0), irs, fd); | |
| 250 } | |
| 251 | |
| 252 ep = el_param(ep, ethis); | |
| 253 if (ehidden) | |
| 254 ep = el_param(ep, ehidden); // if ehidden goes last | |
| 255 | |
| 256 tyret = tret.totym(); | |
| 257 | |
| 258 // Look for intrinsic functions | |
| 259 if (ec.Eoper == OPER.OPvar && (op = intrinsic_oper(ec.EV.sp.Vsym.Sident.ptr)) != OPER.OPMAX) | |
| 260 { | |
| 261 el_free(ec); | |
| 262 if (OTbinary(op)) | |
| 263 { | |
| 264 ep.Eoper = op; | |
| 265 ep.Ety = tyret; | |
| 266 e = ep; | |
| 267 if (op == OPER.OPscale) | |
| 268 { | |
| 269 elem *et = e.E1; | |
| 270 e.E1() = el_una(OPER.OPd_ld, TYM.TYldouble, e.E1); | |
| 271 e.E1() = el_una(OPER.OPs32_d, TYM.TYdouble, e.E2); | |
| 272 e.E2() = et; | |
| 273 } | |
| 274 else if (op == OPER.OPyl2x || op == OPER.OPyl2xp1) | |
| 275 { | |
| 276 elem *et = e.E1; | |
| 277 e.E1() = e.E2; | |
| 278 e.E2() = et; | |
| 279 } | |
| 280 } | |
| 281 else | |
| 282 e = el_una(op,tyret,ep); | |
| 283 } | |
| 284 else if (ep) | |
| 285 e = el_bin(tf.ispure ? OPER.OPcallns : OPER.OPcall, tyret, ec, ep); | |
| 286 else | |
| 287 e = el_una(tf.ispure ? OPER.OPucallns : OPER.OPucall, tyret, ec); | |
| 288 | |
| 289 if (retmethod == RET.RETstack) | |
| 290 { | |
| 291 e.Ety = TYM.TYnptr; | |
| 292 e = el_una(OPER.OPind, tyret, e); | |
| 293 } | |
| 294 | |
| 295 version (DMDV2) { | |
| 296 if (tf.isref) | |
| 297 { | |
| 298 e.Ety = TYM.TYnptr; | |
| 299 e = el_una(OPER.OPind, tyret, e); | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 if (tybasic(tyret) == TYM.TYstruct) | |
| 304 { | |
| 305 e.Enumbytes = cast(uint)tret.size(); | |
| 306 } | |
| 307 | |
| 308 e = el_combine(eside, e); | |
| 309 return e; | |
| 310 } | |
| 311 | |
| 312 /************************************** | |
| 313 * Fake a struct symbol. | |
| 314 */ | |
| 315 | |
| 316 Classsym* fake_classsym(Identifier id) | |
| 317 { | |
| 318 TYPE* t; | |
| 319 Classsym* scc; | |
| 320 | |
| 321 scc = cast(Classsym*)symbol_calloc(toStringz(id.toChars())); | |
| 322 scc.Sclass = SC.SCstruct; | |
| 323 scc.Sstruct = struct_calloc(); | |
| 324 scc.Sstruct.Sstructalign = 8; | |
| 325 //scc.Sstruct.ptrtype = TYM.TYnptr; | |
| 326 scc.Sstruct.Sflags = STR.STRglobal; | |
| 327 | |
| 328 t = type_alloc(TYM.TYstruct); | |
| 329 t.Tflags |= TF.TFsizeunknown | TF.TFforward; | |
| 330 t.Ttag = scc; // structure tag name | |
| 331 assert(t.Tmangle == 0); | |
| 332 t.Tmangle = mTYman.mTYman_d; | |
| 333 t.Tcount++; | |
| 334 scc.Stype = t; | |
| 335 slist_add(scc); | |
| 336 return scc; | |
| 337 } | |
| 338 | |
| 339 /****************************************** | |
| 340 * Return elem that evaluates to the static frame pointer for function fd. | |
| 341 * If fd is a member function, the returned expression will compute the value | |
| 342 * of fd's 'this' variable. | |
| 343 * This routine is critical for implementing nested functions. | |
| 344 */ | |
| 345 | |
| 346 elem* getEthis(Loc loc, IRState* irs, Dsymbol fd) | |
| 347 { | |
| 348 elem* ethis; | |
| 349 FuncDeclaration thisfd = irs.getFunc(); | |
| 350 Dsymbol fdparent = fd.toParent2(); | |
| 351 | |
| 352 //printf("getEthis(thisfd = '%s', fd = '%s', fdparent = '%s')\n", thisfd.toChars(), fd.toChars(), fdparent.toChars()); | |
| 353 if (fdparent == thisfd) | |
| 354 { | |
| 355 /* Going down one nesting level, i.e. we're calling | |
| 356 * a nested function from its enclosing function. | |
| 357 */ | |
| 358 ///version (DMDV2) { | |
| 359 if (irs.sclosure) | |
| 360 ethis = el_var(irs.sclosure); | |
| 361 else | |
| 362 ///} | |
| 363 if (irs.sthis) | |
| 364 { | |
| 365 // We have a 'this' pointer for the current function | |
| 366 ethis = el_var(irs.sthis); | |
| 367 | |
| 368 /* If no variables in the current function's frame are | |
| 369 * referenced by nested functions, then we can 'skip' | |
| 370 * adding this frame into the linked list of stack | |
| 371 * frames. | |
| 372 */ | |
| 373 version (DMDV2) { | |
| 374 bool cond = (thisfd.closureVars.dim != 0); | |
| 375 } else { | |
| 376 bool cond = thisfd.nestedFrameRef; | |
| 377 } | |
| 378 if (cond) | |
| 379 { | |
| 380 /* Local variables are referenced, can't skip. | |
| 381 * Address of 'this' gives the 'this' for the nested | |
| 382 * function | |
| 383 */ | |
| 384 ethis = el_una(OPER.OPaddr, TYM.TYnptr, ethis); | |
| 385 } | |
| 386 } | |
| 387 else | |
| 388 { | |
| 389 /* No 'this' pointer for current function, | |
| 390 * use null if no references to the current function's frame | |
| 391 */ | |
| 392 ethis = el_long(TYM.TYnptr, 0); | |
| 393 version (DMDV2) { | |
| 394 bool cond = (thisfd.closureVars.dim != 0); | |
| 395 } else { | |
| 396 bool cond = thisfd.nestedFrameRef; | |
| 397 } | |
| 398 if (cond) | |
| 399 { | |
| 400 /* OPframeptr is an operator that gets the frame pointer | |
| 401 * for the current function, i.e. for the x86 it gets | |
| 402 * the value of EBP | |
| 403 */ | |
| 404 ethis.Eoper = OPER.OPframeptr; | |
| 405 } | |
| 406 } | |
| 407 } | |
| 408 else | |
| 409 { | |
| 410 if (!irs.sthis) // if no frame pointer for this function | |
| 411 { | |
| 412 fd.error(loc, "is a nested function and cannot be accessed from %s", irs.getFunc().toChars()); | |
| 413 ethis = el_long(TYM.TYnptr, 0); // error recovery | |
| 414 } | |
| 415 else | |
| 416 { | |
| 417 ethis = el_var(irs.sthis); | |
| 418 Dsymbol s = thisfd; | |
| 419 while (fd != s) | |
| 420 { | |
| 421 /* Go up a nesting level, i.e. we need to find the 'this' | |
| 422 * of an enclosing function. | |
| 423 * Our 'enclosing function' may also be an inner class. | |
| 424 */ | |
| 425 | |
| 426 //printf("\ts = '%s'\n", s.toChars()); | |
| 427 thisfd = s.isFuncDeclaration(); | |
| 428 if (thisfd) | |
| 429 { | |
| 430 /* Enclosing function is a function. | |
| 431 */ | |
| 432 if (fdparent == s.toParent2()) | |
| 433 break; | |
| 434 | |
| 435 if (thisfd.isNested()) | |
| 436 { | |
| 437 FuncDeclaration p = s.toParent2().isFuncDeclaration(); | |
| 438 version (DMDV2) { | |
| 439 bool cond = !p || p.closureVars.dim; | |
| 440 } else { | |
| 441 bool cond = !p || p.nestedFrameRef; | |
| 442 } | |
| 443 if (cond) { | |
| 444 ethis = el_una(OPER.OPind, TYM.TYnptr, ethis); | |
| 445 } | |
| 446 } | |
| 447 else if (thisfd.vthis) | |
| 448 { | |
| 449 ; | |
| 450 } | |
| 451 else | |
| 452 { | |
| 453 // Error should have been caught by front end | |
| 454 assert(0); | |
| 455 } | |
| 456 } | |
| 457 else | |
| 458 { | |
| 459 /* Enclosed by an aggregate. That means the current | |
| 460 * function must be a member function of that aggregate. | |
| 461 */ | |
| 462 ClassDeclaration cd; | |
| 463 StructDeclaration sd; | |
| 464 AggregateDeclaration ad = s.isAggregateDeclaration(); | |
| 465 | |
| 466 if (!ad) | |
| 467 goto Lnoframe; | |
| 468 | |
| 469 cd = s.isClassDeclaration(); | |
| 470 | |
| 471 if (cd && fd.isClassDeclaration() && fd.isClassDeclaration().isBaseOf(cd, null)) | |
| 472 break; | |
| 473 | |
| 474 sd = s.isStructDeclaration(); | |
| 475 | |
| 476 if (fd == sd) | |
| 477 break; | |
| 478 | |
| 479 if (!ad.isNested() || !ad.vthis) | |
| 480 { | |
| 481 Lnoframe: | |
| 482 irs.getFunc().error(loc, "cannot get frame pointer to %s", fd.toChars()); | |
| 483 return el_long(TYM.TYnptr, 0); // error recovery | |
| 484 } | |
| 485 | |
| 486 ethis = el_bin(OPER.OPadd, TYM.TYnptr, ethis, el_long(TYM.TYint, ad.vthis.offset)); | |
| 487 ethis = el_una(OPER.OPind, TYM.TYnptr, ethis); | |
| 488 | |
| 489 if (fdparent == s.toParent2()) | |
| 490 break; | |
| 491 | |
| 492 if (auto fdd = s.toParent2().isFuncDeclaration()) | |
| 493 { | |
| 494 /* Remember that frames for functions that have no | |
| 495 * nested references are skipped in the linked list | |
| 496 * of frames. | |
| 497 */ | |
| 498 version (DMDV2) { | |
| 499 bool cond = (fdd.closureVars.dim != 0); | |
| 500 } else { | |
| 501 bool cond = fdd.nestedFrameRef; | |
| 502 } | |
| 503 if (cond) { | |
| 504 ethis = el_una(OPER.OPind, TYM.TYnptr, ethis); | |
| 505 } | |
| 506 break; | |
| 507 } | |
| 508 } | |
| 509 s = s.toParent2(); | |
| 510 assert(s); | |
| 511 } | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 static if (false) { | |
| 516 printf("ethis:\n"); | |
| 517 elem_print(ethis); | |
| 518 printf("\n"); | |
| 519 } | |
| 520 | |
| 521 return ethis; | |
| 522 } | |
| 523 | |
| 524 /***************************************** | |
| 525 * Convert array to a pointer to the data. | |
| 526 */ | |
| 527 | |
| 528 elem* array_toPtr(Type t, elem* e) | |
| 529 { | |
| 530 //printf("array_toPtr()\n"); | |
| 531 //elem_print(e); | |
| 532 t = t.toBasetype(); | |
| 533 switch (t.ty) | |
| 534 { | |
| 535 case TY.Tpointer: | |
| 536 break; | |
| 537 | |
| 538 case TY.Tarray: | |
| 539 case TY.Tdelegate: | |
| 540 if (e.Eoper == OPER.OPcomma) | |
| 541 { | |
| 542 e.Ety = TYM.TYnptr; | |
| 543 e.E2() = array_toPtr(t, e.E2); | |
| 544 } | |
| 545 else if (e.Eoper == OPER.OPpair) | |
| 546 { | |
| 547 e.Eoper = OPER.OPcomma; | |
| 548 e.Ety = TYM.TYnptr; | |
| 549 } | |
| 550 else | |
| 551 { | |
| 552 static if (true) { | |
| 553 e = el_una(OPER.OPmsw, TYM.TYnptr, e); | |
| 554 } else { | |
| 555 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 556 e = el_bin(OPER.OPadd, TYM.TYnptr, e, el_long(TYM.TYint, 4)); | |
| 557 e = el_una(OPER.OPind, TYM.TYnptr, e); | |
| 558 } | |
| 559 } | |
| 560 break; | |
| 561 | |
| 562 case TY.Tsarray: | |
| 563 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 564 break; | |
| 565 | |
| 566 default: | |
| 567 ///t.print(); | |
| 568 assert(0); | |
| 569 } | |
| 570 return e; | |
| 571 } | |
| 572 | |
| 573 /******************************************* | |
| 574 * Take address of an elem. | |
| 575 */ | |
| 576 | |
| 577 elem* addressElem(elem* e, Type t) | |
| 578 { | |
| 579 elem** pe; | |
| 580 | |
| 581 //printf("addressElem()\n"); | |
| 582 | |
| 583 for (pe = &e; (*pe).Eoper == OPER.OPcomma; pe = &(*pe).E2()) { | |
| 584 ; | |
| 585 } | |
| 586 | |
| 587 if ((*pe).Eoper != OPER.OPvar && (*pe).Eoper != OPER.OPind) | |
| 588 { | |
| 589 Symbol* stmp; | |
| 590 elem* eeq; | |
| 591 elem* ee = *pe; | |
| 592 type* tx; | |
| 593 | |
| 594 // Convert to ((tmp=ee),tmp) | |
| 595 TY ty; | |
| 596 if (t && ((ty = t.toBasetype().ty) == TY.Tstruct || ty == TY.Tsarray)) | |
| 597 tx = t.toCtype(); | |
| 598 else | |
| 599 tx = type_fake(ee.Ety); | |
| 600 stmp = symbol_genauto(tx); | |
| 601 eeq = el_bin(OPER.OPeq,ee.Ety,el_var(stmp),ee); | |
| 602 | |
| 603 if (tybasic(ee.Ety) == TYM.TYstruct) | |
| 604 { | |
| 605 eeq.Eoper = OPER.OPstreq; | |
| 606 eeq.Enumbytes = ee.Enumbytes; | |
| 607 } | |
| 608 else if (tybasic(ee.Ety) == TYM.TYarray) | |
| 609 { | |
| 610 eeq.Eoper = OPER.OPstreq; | |
| 611 eeq.Ety = TYM.TYstruct; | |
| 612 eeq.Ejty = cast(ubyte)eeq.Ety; | |
| 613 eeq.Enumbytes = cast(uint)t.size(); | |
| 614 } | |
| 615 *pe = el_bin(OPER.OPcomma, ee.Ety, eeq, el_var(stmp)); | |
| 616 } | |
| 617 | |
| 618 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 619 return e; | |
| 620 } | |
| 621 | |
| 622 /******************************************* | |
| 623 * Convert intrinsic function to operator. | |
| 624 * Returns that operator, -1 if not an intrinsic function. | |
| 625 */ | |
| 626 | |
| 627 extern (C++) extern int intrinsic_op(char* name); | |
| 628 | |
| 629 OPER intrinsic_oper(const(char)* name) | |
| 630 { | |
| 631 int result = intrinsic_op(cast(char*)name); | |
| 632 if (result == -1) return OPER.OPMAX; | |
| 633 return cast(OPER)result; | |
| 634 } | |
| 635 | |
| 636 /************************************** | |
| 637 */ | |
| 638 | |
| 639 elem* Dsymbol_toElem(Dsymbol s, IRState *irs) | |
| 640 { | |
| 641 elem *e = null; | |
| 642 Symbol* sp; | |
| 643 AttribDeclaration ad; | |
| 644 VarDeclaration vd; | |
| 645 ClassDeclaration cd; | |
| 646 StructDeclaration sd; | |
| 647 FuncDeclaration fd; | |
| 648 TemplateMixin tm; | |
| 649 TupleDeclaration td; | |
| 650 TypedefDeclaration tyd; | |
| 651 | |
| 652 //printf("Dsymbol_toElem() %s\n", s.toChars()); | |
| 653 ad = s.isAttribDeclaration(); | |
| 654 if (ad) | |
| 655 { | |
| 656 Array decl = ad.include(null, null); | |
| 657 if (decl && decl.dim) | |
| 658 { | |
| 659 for (size_t i = 0; i < decl.dim; i++) | |
| 660 { | |
| 661 s = cast(Dsymbol)decl.data[i]; | |
| 662 e = el_combine(e, Dsymbol_toElem(s, irs)); | |
| 663 } | |
| 664 } | |
| 665 } | |
| 666 else if ((vd = s.isVarDeclaration()) !is null) | |
| 667 { | |
| 668 s = s.toAlias(); | |
| 669 if (s != vd) | |
| 670 return Dsymbol_toElem(s, irs); | |
| 671 if (vd.isStatic() || vd.storage_class & (STC.STCextern | STC.STCtls | STC.STCgshared)) | |
| 672 vd.toObjFile(0); | |
| 673 else | |
| 674 { | |
| 675 sp = s.toSymbol(); | |
| 676 symbol_add(sp); | |
| 677 //printf("\tadding symbol '%s'\n", sp.Sident); | |
| 678 if (vd.init) | |
| 679 { | |
| 680 ExpInitializer ie = vd.init.isExpInitializer(); | |
| 681 if (ie) { | |
| 682 e = ie.exp.toElem(irs); | |
| 683 } | |
| 684 } | |
| 685 } | |
| 686 } | |
| 687 else if ((cd = s.isClassDeclaration()) !is null) | |
| 688 { | |
| 689 irs.deferToObj.push(cast(void*)s); | |
| 690 } | |
| 691 else if ((sd = s.isStructDeclaration()) !is null) | |
| 692 { | |
| 693 irs.deferToObj.push(cast(void*)sd); | |
| 694 } | |
| 695 else if ((fd = s.isFuncDeclaration()) !is null) | |
| 696 { | |
| 697 //printf("function %s\n", fd.toChars()); | |
| 698 irs.deferToObj.push(cast(void*)fd); | |
| 699 } | |
| 700 else if ((tm = s.isTemplateMixin()) !is null) | |
| 701 { | |
| 702 //printf("%s\n", tm.toChars()); | |
| 703 if (tm.members) | |
| 704 { | |
| 705 for (size_t i = 0; i < tm.members.dim; i++) | |
| 706 { | |
| 707 Dsymbol sm = cast(Dsymbol)tm.members.data[i]; | |
| 708 e = el_combine(e, Dsymbol_toElem(sm, irs)); | |
| 709 } | |
| 710 } | |
| 711 } | |
| 712 else if ((td = s.isTupleDeclaration()) !is null) | |
| 713 { | |
| 714 for (size_t i = 0; i < td.objects.dim; i++) | |
| 715 { | |
| 716 Object o = cast(Object)td.objects.data[i]; | |
| 717 ///if (o.dyncast() == DYNCAST_EXPRESSION) | |
| 718 if (Expression eo = cast(Expression)o) | |
| 719 { | |
| 720 if (eo.op == TOK.TOKdsymbol) | |
| 721 { | |
| 722 DsymbolExp se = cast(DsymbolExp)eo; | |
| 723 e = el_combine(e, Dsymbol_toElem(se.s, irs)); | |
| 724 } | |
| 725 } | |
| 726 } | |
| 727 } | |
| 728 else if ((tyd = s.isTypedefDeclaration()) !is null) | |
| 729 { | |
| 730 irs.deferToObj.push(cast(void*)tyd); | |
| 731 } | |
| 732 | |
| 733 return e; | |
| 734 } | |
| 735 | |
| 736 /************************************** | |
| 737 * Given an expression e that is an array, | |
| 738 * determine and set the 'length' variable. | |
| 739 * Input: | |
| 740 * lengthVar Symbol of 'length' variable | |
| 741 * &e expression that is the array | |
| 742 * t1 Type of the array | |
| 743 * Output: | |
| 744 * e is rewritten to avoid side effects | |
| 745 * Returns: | |
| 746 * expression that initializes 'length' | |
| 747 */ | |
| 748 | |
| 749 elem* resolveLengthVar(VarDeclaration lengthVar, elem** pe, Type t1) | |
| 750 { | |
| 751 //printf("resolveLengthVar()\n"); | |
| 752 elem* einit = null; | |
| 753 | |
| 754 if (lengthVar && !(lengthVar.storage_class & STC.STCconst)) | |
| 755 { | |
| 756 elem* elength; | |
| 757 Symbol* slength; | |
| 758 | |
| 759 if (t1.ty == TY.Tsarray) | |
| 760 { | |
| 761 TypeSArray tsa = cast(TypeSArray)t1; | |
| 762 long length = tsa.dim.toInteger(); | |
| 763 | |
| 764 elength = el_long(TYM.TYuint, length); | |
| 765 goto L3; | |
| 766 } | |
| 767 else if (t1.ty == TY.Tarray) | |
| 768 { | |
| 769 elength = *pe; | |
| 770 *pe = el_same(&elength); | |
| 771 elength = el_una(OPER.OP64_32, TYM.TYuint, elength); | |
| 772 | |
| 773 L3: | |
| 774 slength = lengthVar.toSymbol(); | |
| 775 //symbol_add(slength); | |
| 776 | |
| 777 einit = el_bin(OPER.OPeq, TYM.TYuint, el_var(slength), elength); | |
| 778 } | |
| 779 } | |
| 780 return einit; | |
| 781 } | |
| 782 | |
| 783 /******************************************* | |
| 784 * Set an array pointed to by eptr to evalue: | |
| 785 * eptr[0..edim] = evalue; | |
| 786 * Input: | |
| 787 * eptr where to write the data to | |
| 788 * evalue value to write | |
| 789 * edim number of times to write evalue to eptr[] | |
| 790 * tb type of evalue | |
| 791 */ | |
| 792 | |
| 793 elem* setArray(elem* eptr, elem* edim, Type tb, elem* evalue, IRState* irs, int op) | |
| 794 { | |
| 795 int r; | |
| 796 elem* e; | |
| 797 int sz = cast(int)tb.size(); | |
| 798 | |
| 799 if (tb.ty == TY.Tfloat80 || tb.ty == TY.Timaginary80) | |
| 800 r = RTLSYM.RTLSYM_MEMSET80; | |
| 801 else if (tb.ty == TY.Tcomplex80) | |
| 802 r = RTLSYM.RTLSYM_MEMSET160; | |
| 803 else if (tb.ty == TY.Tcomplex64) | |
| 804 r = RTLSYM.RTLSYM_MEMSET128; | |
| 805 else | |
| 806 { | |
| 807 switch (sz) | |
| 808 { | |
| 809 case 1: r = RTLSYM.RTLSYM_MEMSET8; break; | |
| 810 case 2: r = RTLSYM.RTLSYM_MEMSET16; break; | |
| 811 case 4: r = RTLSYM.RTLSYM_MEMSET32; break; | |
| 812 case 8: r = RTLSYM.RTLSYM_MEMSET64; break; | |
| 813 default: r = RTLSYM.RTLSYM_MEMSETN; break; | |
| 814 } | |
| 815 | |
| 816 /* Determine if we need to do postblit | |
| 817 */ | |
| 818 if (op != TOK.TOKblit) | |
| 819 { | |
| 820 StructDeclaration sd = needsPostblit(tb); | |
| 821 if (sd) | |
| 822 { | |
| 823 /* Need to do postblit. | |
| 824 * void *_d_arraysetassign(void *p, void *value, int dim, TypeInfo ti); | |
| 825 */ | |
| 826 r = (op == TOK.TOKconstruct) ? RTLSYM.RTLSYM_ARRAYSETCTOR : RTLSYM.RTLSYM_ARRAYSETASSIGN; | |
| 827 evalue = el_una(OPER.OPaddr, TYM.TYnptr, evalue); | |
| 828 Expression ti = tb.getTypeInfo(null); | |
| 829 elem* eti = ti.toElem(irs); | |
| 830 e = el_params(eti, edim, evalue, eptr, null); | |
| 831 e = el_bin(OPER.OPcall, TYM.TYnptr, el_var(rtlsym[r]), e); | |
| 832 return e; | |
| 833 } | |
| 834 } | |
| 835 | |
| 836 if (r == RTLSYM.RTLSYM_MEMSETN) | |
| 837 { | |
| 838 // void *_memsetn(void *p, void *value, int dim, int sizelem) | |
| 839 evalue = el_una(OPER.OPaddr, TYM.TYnptr, evalue); | |
| 840 elem *esz = el_long(TYM.TYint, sz); | |
| 841 e = el_params(esz, edim, evalue, eptr, null); | |
| 842 e = el_bin(OPER.OPcall, TYM.TYnptr, el_var(rtlsym[r]), e); | |
| 843 return e; | |
| 844 } | |
| 845 } | |
| 846 if (sz > 1 && sz <= 8 && evalue.Eoper == OPER.OPconst && el_allbits(evalue, 0)) | |
| 847 { | |
| 848 r = RTLSYM.RTLSYM_MEMSET8; | |
| 849 edim = el_bin(OPER.OPmul, TYM.TYuint, edim, el_long(TYM.TYuint, sz)); | |
| 850 } | |
| 851 | |
| 852 if (tybasic(evalue.Ety) == TYM.TYstruct) | |
| 853 { | |
| 854 evalue = el_una(OPER.OPstrpar, TYM.TYstruct, evalue); | |
| 855 evalue.Enumbytes = evalue.E1.Enumbytes; | |
| 856 assert(evalue.Enumbytes); | |
| 857 } | |
| 858 | |
| 859 // Be careful about parameter side effect ordering | |
| 860 if (r == RTLSYM.RTLSYM_MEMSET8) | |
| 861 { | |
| 862 e = el_param(edim, evalue); | |
| 863 e = el_bin(OPER.OPmemset, TYM.TYnptr, eptr, e); | |
| 864 } | |
| 865 else | |
| 866 { | |
| 867 e = el_params(edim, evalue, eptr, null); | |
| 868 e = el_bin(OPER.OPcall, TYM.TYnptr, el_var(rtlsym[r]), e); | |
| 869 } | |
| 870 return e; | |
| 871 } | |
| 872 | |
| 873 /************************* | |
| 874 * Initialize the hidden aggregate member, vthis, with | |
| 875 * the context pointer. | |
| 876 * Returns: | |
| 877 * *(ey + ad.vthis.offset) = this; | |
| 878 */ | |
| 879 version (DMDV2) { | |
| 880 elem* setEthis(Loc loc, IRState* irs, elem* ey, AggregateDeclaration ad) | |
| 881 { | |
| 882 elem* ethis; | |
| 883 FuncDeclaration thisfd = irs.getFunc(); | |
| 884 int offset = 0; | |
| 885 Dsymbol cdp = ad.toParent2(); // class/func we're nested in | |
| 886 | |
| 887 //printf("setEthis(ad = %s, cdp = %s, thisfd = %s)\n", ad.toChars(), cdp.toChars(), thisfd.toChars()); | |
| 888 | |
| 889 if (cdp is thisfd) | |
| 890 { | |
| 891 /* Class we're new'ing is a local class in this function: | |
| 892 * void thisfd() { class ad { } } | |
| 893 */ | |
| 894 if (irs.sclosure) | |
| 895 ethis = el_var(irs.sclosure); | |
| 896 else if (irs.sthis) | |
| 897 { | |
| 898 /// version (DMDV2) { | |
| 899 if (thisfd.closureVars.dim) | |
| 900 /// } else { | |
| 901 /// if (thisfd.nestedFrameRef) | |
| 902 /// } | |
| 903 { | |
| 904 ethis = el_ptr(irs.sthis); | |
| 905 } | |
| 906 else | |
| 907 ethis = el_var(irs.sthis); | |
| 908 } | |
| 909 else | |
| 910 { | |
| 911 ethis = el_long(TYM.TYnptr, 0); | |
| 912 /// version (DMDV2) { | |
| 913 if (thisfd.closureVars.dim) | |
| 914 /// } else { | |
| 915 /// if (thisfd.nestedFrameRef) | |
| 916 /// } | |
| 917 { | |
| 918 ethis.Eoper = OPER.OPframeptr; | |
| 919 } | |
| 920 } | |
| 921 } | |
| 922 else if (thisfd.vthis && ( | |
| 923 cdp == thisfd.toParent2() || ( | |
| 924 cdp.isClassDeclaration() && cdp.isClassDeclaration().isBaseOf(thisfd.toParent2().isClassDeclaration(), &offset) | |
| 925 ) | |
| 926 ) | |
| 927 ) | |
| 928 { | |
| 929 /* Class we're new'ing is at the same level as thisfd | |
| 930 */ | |
| 931 assert(offset == 0); // BUG: should handle this case | |
| 932 ethis = el_var(irs.sthis); | |
| 933 } | |
| 934 else | |
| 935 { | |
| 936 ethis = getEthis(loc, irs, ad.toParent2()); | |
| 937 ethis = el_una(OPER.OPaddr, TYM.TYnptr, ethis); | |
| 938 } | |
| 939 | |
| 940 ey = el_bin(OPER.OPadd, TYM.TYnptr, ey, el_long(TYM.TYint, ad.vthis.offset)); | |
| 941 ey = el_una(OPER.OPind, TYM.TYnptr, ey); | |
| 942 ey = el_bin(OPER.OPeq, TYM.TYnptr, ey, ethis); | |
| 943 | |
| 944 return ey; | |
| 945 } | |
| 946 } | |
| 947 | |
| 948 /******************************************** | |
| 949 * Determine if t is an array of structs that need a postblit. | |
| 950 */ | |
| 951 StructDeclaration needsPostblit(Type t) | |
| 952 { | |
| 953 t = t.toBasetype(); | |
| 954 | |
| 955 while (t.ty == TY.Tsarray) | |
| 956 t = t.nextOf().toBasetype(); | |
| 957 | |
| 958 if (t.ty == TY.Tstruct) | |
| 959 { | |
| 960 StructDeclaration sd = (cast(TypeStruct)t).sym; | |
| 961 if (sd.postblit) | |
| 962 return sd; | |
| 963 } | |
| 964 | |
| 965 return null; | |
| 966 } | |
| 967 | |
| 968 /***************************************** | |
| 969 * Convert array to a dynamic array. | |
| 970 */ | |
| 971 | |
| 972 elem* array_toDarray(Type t, elem* e) | |
| 973 { | |
| 974 uint dim; | |
| 975 elem* ef = null; | |
| 976 elem* ex; | |
| 977 | |
| 978 //printf("array_toDarray(t = %s)\n", t.toChars()); | |
| 979 //elem_print(e); | |
| 980 t = t.toBasetype(); | |
| 981 switch (t.ty) | |
| 982 { | |
| 983 case TY.Tarray: | |
| 984 break; | |
| 985 | |
| 986 case TY.Tsarray: | |
| 987 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 988 dim = cast(uint)(cast(TypeSArray)t).dim.toInteger(); | |
| 989 e = el_pair(TYM.TYullong, el_long(TYM.TYint, dim), e); | |
| 990 break; | |
| 991 | |
| 992 default: | |
| 993 L1: | |
| 994 switch (e.Eoper) | |
| 995 { | |
| 996 case OPER.OPconst: | |
| 997 { | |
| 998 size_t len = tysize[tybasic(e.Ety)]; | |
| 999 elem* es = el_calloc(); | |
| 1000 es.Eoper = OPER.OPstring; | |
| 1001 | |
| 1002 // Match MEM_PH_FREE for OPstring in ztc\el.c | |
|
5
63623152e82a
Fixed memory corruption bug which was introduced when attempting to restore GC functionality
dkoroskin <>
parents:
4
diff
changeset
|
1003 es.EV.ss.Vstring = cast(char*)malloc(len); /// ! |
| 0 | 1004 memcpy(es.EV.ss.Vstring, &e.EV, len); |
| 1005 | |
| 1006 es.EV.ss.Vstrlen = len; | |
| 1007 es.Ety = TYM.TYnptr; | |
| 1008 e = es; | |
| 1009 break; | |
| 1010 } | |
| 1011 | |
| 1012 case OPER.OPvar: | |
| 1013 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 1014 break; | |
| 1015 | |
| 1016 case OPER.OPcomma: | |
| 1017 ef = el_combine(ef, e.E1); | |
| 1018 ex = e; | |
| 1019 e = e.E2; | |
| 1020 ex.E1() = null; | |
| 1021 ex.E2() = null; | |
| 1022 el_free(ex); | |
| 1023 goto L1; | |
| 1024 | |
| 1025 case OPER.OPind: | |
| 1026 ex = e; | |
| 1027 e = e.E1; | |
| 1028 ex.E1() = null; | |
| 1029 ex.E2() = null; | |
| 1030 el_free(ex); | |
| 1031 break; | |
| 1032 | |
| 1033 default: | |
| 1034 { | |
| 1035 // Copy expression to a variable and take the | |
| 1036 // address of that variable. | |
| 1037 Symbol* stmp; | |
| 1038 tym_t ty = tybasic(e.Ety); | |
| 1039 | |
| 1040 if (ty == TYM.TYstruct) | |
| 1041 { | |
| 1042 if (e.Enumbytes == 4) | |
| 1043 ty = TYM.TYint; | |
| 1044 else if (e.Enumbytes == 8) | |
| 1045 ty = TYM.TYllong; | |
| 1046 } | |
| 1047 e.Ety = ty; | |
| 1048 stmp = symbol_genauto(type_fake(ty)); | |
| 1049 e = el_bin(OPER.OPeq, e.Ety, el_var(stmp), e); | |
| 1050 e = el_bin(OPER.OPcomma, TYM.TYnptr, e, el_una(OPER.OPaddr, TYM.TYnptr, el_var(stmp))); | |
| 1051 break; | |
| 1052 } | |
| 1053 } | |
| 1054 dim = 1; | |
| 1055 e = el_pair(TYM.TYullong, el_long(TYM.TYint, dim), e); | |
| 1056 break; | |
| 1057 } | |
| 1058 | |
| 1059 return el_combine(ef, e); | |
| 1060 } | |
| 1061 | |
| 1062 elem* sarray_toDarray(Loc loc, Type tfrom, Type tto, elem* e) | |
| 1063 { | |
| 1064 //printf("sarray_toDarray()\n"); | |
| 1065 //elem_print(e); | |
| 1066 | |
| 1067 elem* elen; | |
| 1068 uint dim = cast(uint)(cast(TypeSArray)tfrom).dim.toInteger(); | |
| 1069 | |
| 1070 if (tto) | |
| 1071 { | |
| 1072 uint fsize = cast(uint)tfrom.nextOf().size(); | |
| 1073 uint tsize = cast(uint)tto.nextOf().size(); | |
| 1074 | |
| 1075 if ((dim * fsize) % tsize != 0) | |
| 1076 { | |
| 1077 Lerr: | |
| 1078 error(loc, "cannot cast %s to %s since sizes don't line up", tfrom.toChars(), tto.toChars()); | |
| 1079 } | |
| 1080 dim = (dim * fsize) / tsize; | |
| 1081 } | |
| 1082 | |
| 1083 L1: | |
| 1084 elen = el_long(TYM.TYint, dim); | |
| 1085 e = el_una(OPER.OPaddr, TYM.TYnptr, e); | |
| 1086 e = el_pair(TYM.TYullong, elen, e); | |
| 1087 return e; | |
| 1088 } | |
| 1089 | |
| 1090 elem* eval_Darray(IRState* irs, Expression e) | |
| 1091 { | |
| 1092 elem* ex = e.toElem(irs); | |
| 1093 return array_toDarray(e.type, ex); | |
| 1094 } | |
| 1095 | |
| 1096 /*********************************************** | |
| 1097 * Generate code to set index into scope table. | |
| 1098 */ | |
| 1099 | |
| 1100 void setScopeIndex(Blockx* blx, block* b, int scope_index) | |
| 1101 { | |
| 1102 version (SEH) { | |
| 1103 block_appendexp(b, nteh_setScopeTableIndex(blx, scope_index)); | |
| 1104 } | |
| 1105 } | |
| 1106 | |
| 1107 /**************************************** | |
| 1108 * Create a static symbol we can hang DT initializers onto. | |
| 1109 */ | |
| 1110 | |
| 1111 Symbol* static_sym() | |
| 1112 { | |
| 1113 Symbol* s; | |
| 1114 type* t; | |
| 1115 | |
| 1116 t = type_alloc(TYint); | |
| 1117 t.Tcount++; | |
| 1118 s = symbol_calloc("internal"); | |
| 1119 s.Sclass = SCstatic; | |
| 1120 s.Sfl = FLextern; | |
| 1121 s.Sflags |= SFLnodebug; | |
| 1122 s.Stype = t; | |
| 1123 version (ELFOBJ_OR_MACHOBJ) { | |
| 1124 s.Sseg = DATA; | |
| 1125 } | |
| 1126 slist_add(s); | |
| 1127 return s; | |
| 1128 } | |
| 1129 | |
| 1130 /************************************** | |
| 1131 * Convert label to block. | |
| 1132 */ | |
| 1133 | |
| 1134 block* labelToBlock(Loc loc, Blockx *blx, LabelDsymbol label) | |
| 1135 { | |
| 1136 LabelStatement s; | |
| 1137 | |
| 1138 if (!label.statement) | |
| 1139 { | |
| 1140 error(loc, "undefined label %s", label.toChars()); | |
| 1141 return null; | |
| 1142 } | |
| 1143 | |
| 1144 s = label.statement; | |
| 1145 if (!s.lblock) | |
| 1146 { | |
| 1147 s.lblock = block_calloc(blx); | |
| 1148 if (s.isReturnLabel) | |
| 1149 s.lblock.Btry = null; | |
| 1150 } | |
| 1151 return s.lblock; | |
| 1152 } |