1 /* 2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "interpreter/rewriter.hpp" 27 #include "memory/oopFactory.hpp" 28 #include "prims/methodHandleWalk.hpp" 29 30 /* 31 * JSR 292 reference implementation: method handle structure analysis 32 */ 33 34 #ifdef PRODUCT 35 #define print_method_handle(mh) {} 36 #else //PRODUCT 37 extern "C" void print_method_handle(oop mh); 38 #endif //PRODUCT 39 40 // ----------------------------------------------------------------------------- 41 // MethodHandleChain 42 43 void MethodHandleChain::set_method_handle(Handle mh, TRAPS) { 44 if (!java_lang_invoke_MethodHandle::is_instance(mh())) lose("bad method handle", CHECK); 45 46 // set current method handle and unpack partially 47 _method_handle = mh; 48 _is_last = false; 49 _is_bound = false; 50 _arg_slot = -1; 51 _arg_type = T_VOID; 52 _conversion = -1; 53 _last_invoke = Bytecodes::_nop; //arbitrary non-garbage 54 55 if (java_lang_invoke_DirectMethodHandle::is_instance(mh())) { 56 set_last_method(mh(), THREAD); 57 return; 58 } 59 if (java_lang_invoke_AdapterMethodHandle::is_instance(mh())) { 60 _conversion = AdapterMethodHandle_conversion(); 61 assert(_conversion != -1, "bad conv value"); 62 assert(java_lang_invoke_BoundMethodHandle::is_instance(mh()), "also BMH"); 63 } 64 if (java_lang_invoke_BoundMethodHandle::is_instance(mh())) { 65 if (!is_adapter()) // keep AMH and BMH separate in this model 66 _is_bound = true; 67 _arg_slot = BoundMethodHandle_vmargslot(); 68 oop target = MethodHandle_vmtarget_oop(); 69 if (!is_bound() || java_lang_invoke_MethodHandle::is_instance(target)) { 70 _arg_type = compute_bound_arg_type(target, NULL, _arg_slot, CHECK); 71 } else if (target != NULL && target->is_method()) { 72 methodOop m = (methodOop) target; 73 _arg_type = compute_bound_arg_type(NULL, m, _arg_slot, CHECK); 74 set_last_method(mh(), CHECK); 75 } else { 76 _is_bound = false; // lose! 77 } 78 } 79 if (is_bound() && _arg_type == T_VOID) { 80 lose("bad vmargslot", CHECK); 81 } 82 if (!is_bound() && !is_adapter()) { 83 lose("unrecognized MH type", CHECK); 84 } 85 } 86 87 88 void MethodHandleChain::set_last_method(oop target, TRAPS) { 89 _is_last = true; 90 KlassHandle receiver_limit; int flags = 0; 91 _last_method = MethodHandles::decode_method(target, receiver_limit, flags); 92 if ((flags & MethodHandles::_dmf_has_receiver) == 0) 93 _last_invoke = Bytecodes::_invokestatic; 94 else if ((flags & MethodHandles::_dmf_does_dispatch) == 0) 95 _last_invoke = Bytecodes::_invokespecial; 96 else if ((flags & MethodHandles::_dmf_from_interface) != 0) 97 _last_invoke = Bytecodes::_invokeinterface; 98 else 99 _last_invoke = Bytecodes::_invokevirtual; 100 } 101 102 103 BasicType MethodHandleChain::compute_bound_arg_type(oop target, methodOop m, int arg_slot, TRAPS) { 104 // There is no direct indication of whether the argument is primitive or not. 105 // It is implied by the _vmentry code, and by the MethodType of the target. 106 BasicType arg_type = T_VOID; 107 if (target != NULL) { 108 oop mtype = java_lang_invoke_MethodHandle::type(target); 109 int arg_num = MethodHandles::argument_slot_to_argnum(mtype, arg_slot); 110 if (arg_num >= 0) { 111 oop ptype = java_lang_invoke_MethodType::ptype(mtype, arg_num); 112 arg_type = java_lang_Class::as_BasicType(ptype); 113 } 114 } else if (m != NULL) { 115 // figure out the argument type from the slot 116 // FIXME: make this explicit in the MH 117 int cur_slot = m->size_of_parameters(); 118 if (arg_slot >= cur_slot) 119 return T_VOID; 120 if (!m->is_static()) { 121 cur_slot -= type2size[T_OBJECT]; 122 if (cur_slot == arg_slot) 123 return T_OBJECT; 124 } 125 ResourceMark rm(THREAD); 126 for (SignatureStream ss(m->signature()); !ss.is_done(); ss.next()) { 127 BasicType bt = ss.type(); 128 cur_slot -= type2size[bt]; 129 if (cur_slot <= arg_slot) { 130 if (cur_slot == arg_slot) 131 arg_type = bt; 132 break; 133 } 134 } 135 } 136 if (arg_type == T_ARRAY) 137 arg_type = T_OBJECT; 138 return arg_type; 139 } 140 141 142 void MethodHandleChain::lose(const char* msg, TRAPS) { 143 _lose_message = msg; 144 #ifdef ASSERT 145 if (Verbose) { 146 tty->print_cr(INTPTR_FORMAT " lose: %s", _method_handle(), msg); 147 print(); 148 } 149 #endif 150 if (!THREAD->is_Java_thread() || ((JavaThread*)THREAD)->thread_state() != _thread_in_vm) { 151 // throw a preallocated exception 152 THROW_OOP(Universe::virtual_machine_error_instance()); 153 } 154 THROW_MSG(vmSymbols::java_lang_InternalError(), msg); 155 } 156 157 158 #ifdef ASSERT 159 static const char* adapter_ops[] = { 160 "retype_only" , 161 "retype_raw" , 162 "check_cast" , 163 "prim_to_prim" , 164 "ref_to_prim" , 165 "prim_to_ref" , 166 "swap_args" , 167 "rot_args" , 168 "dup_args" , 169 "drop_args" , 170 "collect_args" , 171 "spread_args" , 172 "fold_args" 173 }; 174 175 static const char* adapter_op_to_string(int op) { 176 if (op >= 0 && op < (int)ARRAY_SIZE(adapter_ops)) 177 return adapter_ops[op]; 178 return "unknown_op"; 179 } 180 181 void MethodHandleChain::print(oopDesc* m) { 182 HandleMark hm; 183 ResourceMark rm; 184 Handle mh(m); 185 EXCEPTION_MARK; 186 MethodHandleChain mhc(mh, THREAD); 187 if (HAS_PENDING_EXCEPTION) { 188 oop ex = THREAD->pending_exception(); 189 CLEAR_PENDING_EXCEPTION; 190 ex->print(); 191 return; 192 } 193 mhc.print(); 194 } 195 196 197 void MethodHandleChain::print() { 198 EXCEPTION_MARK; 199 print_impl(THREAD); 200 if (HAS_PENDING_EXCEPTION) { 201 oop ex = THREAD->pending_exception(); 202 CLEAR_PENDING_EXCEPTION; 203 ex->print(); 204 } 205 } 206 207 void MethodHandleChain::print_impl(TRAPS) { 208 ResourceMark rm; 209 210 MethodHandleChain chain(_root, CHECK); 211 for (;;) { 212 tty->print(INTPTR_FORMAT ": ", chain.method_handle()()); 213 if (chain.is_bound()) { 214 tty->print("bound: arg_type %s arg_slot %d", 215 type2name(chain.bound_arg_type()), 216 chain.bound_arg_slot()); 217 oop o = chain.bound_arg_oop(); 218 if (o != NULL) { 219 if (o->is_instance()) { 220 tty->print(" instance %s", o->klass()->klass_part()->internal_name()); 221 if (java_lang_invoke_CountingMethodHandle::is_instance(o)) { 222 tty->print(" vmcount: %d", java_lang_invoke_CountingMethodHandle::vmcount(o)); 223 } 224 } else { 225 o->print(); 226 } 227 } 228 oop vmt = chain.vmtarget_oop(); 229 if (vmt != NULL) { 230 if (vmt->is_method()) { 231 tty->print(" "); 232 methodOop(vmt)->print_short_name(tty); 233 } else if (java_lang_invoke_MethodHandle::is_instance(vmt)) { 234 tty->print(" method handle " INTPTR_FORMAT, vmt); 235 } else { 236 ShouldNotReachHere(); 237 } 238 } 239 } else if (chain.is_adapter()) { 240 tty->print("adapter: arg_slot %d conversion op %s", 241 chain.adapter_arg_slot(), 242 adapter_op_to_string(chain.adapter_conversion_op())); 243 switch (chain.adapter_conversion_op()) { 244 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY: 245 if (java_lang_invoke_CountingMethodHandle::is_instance(chain.method_handle_oop())) { 246 tty->print(" vmcount: %d", java_lang_invoke_CountingMethodHandle::vmcount(chain.method_handle_oop())); 247 } 248 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW: 249 case java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST: 250 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM: 251 case java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM: 252 break; 253 254 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF: { 255 tty->print(" src_type = %s", type2name(chain.adapter_conversion_src_type())); 256 break; 257 } 258 259 case java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS: 260 case java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS: { 261 int dest_arg_slot = chain.adapter_conversion_vminfo(); 262 tty->print(" dest_arg_slot %d type %s", dest_arg_slot, type2name(chain.adapter_conversion_src_type())); 263 break; 264 } 265 266 case java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS: 267 case java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS: { 268 int dup_slots = chain.adapter_conversion_stack_pushes(); 269 tty->print(" pushes %d", dup_slots); 270 break; 271 } 272 273 case java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS: 274 case java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS: { 275 int coll_slots = chain.MethodHandle_vmslots(); 276 tty->print(" coll_slots %d", coll_slots); 277 break; 278 } 279 280 case java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS: { 281 // Check the required length. 282 int spread_slots = 1 + chain.adapter_conversion_stack_pushes(); 283 tty->print(" spread_slots %d", spread_slots); 284 break; 285 } 286 287 default: 288 tty->print_cr("bad adapter conversion"); 289 break; 290 } 291 } else { 292 // DMH 293 tty->print("direct: "); 294 chain.last_method_oop()->print_short_name(tty); 295 } 296 297 tty->print(" ("); 298 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(chain.method_type_oop()); 299 for (int i = ptypes->length() - 1; i >= 0; i--) { 300 BasicType t = java_lang_Class::as_BasicType(ptypes->obj_at(i)); 301 if (t == T_ARRAY) t = T_OBJECT; 302 tty->print("%c", type2char(t)); 303 if (t == T_LONG || t == T_DOUBLE) tty->print("_"); 304 } 305 tty->print(")"); 306 BasicType rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(chain.method_type_oop())); 307 if (rtype == T_ARRAY) rtype = T_OBJECT; 308 tty->print("%c", type2char(rtype)); 309 tty->cr(); 310 if (!chain.is_last()) { 311 chain.next(CHECK); 312 } else { 313 break; 314 } 315 } 316 } 317 #endif 318 319 320 // ----------------------------------------------------------------------------- 321 // MethodHandleWalker 322 323 Bytecodes::Code MethodHandleWalker::conversion_code(BasicType src, BasicType dest) { 324 if (is_subword_type(src)) { 325 src = T_INT; // all subword src types act like int 326 } 327 if (src == dest) { 328 return Bytecodes::_nop; 329 } 330 331 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d)) 332 switch (SRC_DEST(src, dest)) { 333 case SRC_DEST(T_INT, T_LONG): return Bytecodes::_i2l; 334 case SRC_DEST(T_INT, T_FLOAT): return Bytecodes::_i2f; 335 case SRC_DEST(T_INT, T_DOUBLE): return Bytecodes::_i2d; 336 case SRC_DEST(T_INT, T_BYTE): return Bytecodes::_i2b; 337 case SRC_DEST(T_INT, T_CHAR): return Bytecodes::_i2c; 338 case SRC_DEST(T_INT, T_SHORT): return Bytecodes::_i2s; 339 340 case SRC_DEST(T_LONG, T_INT): return Bytecodes::_l2i; 341 case SRC_DEST(T_LONG, T_FLOAT): return Bytecodes::_l2f; 342 case SRC_DEST(T_LONG, T_DOUBLE): return Bytecodes::_l2d; 343 344 case SRC_DEST(T_FLOAT, T_INT): return Bytecodes::_f2i; 345 case SRC_DEST(T_FLOAT, T_LONG): return Bytecodes::_f2l; 346 case SRC_DEST(T_FLOAT, T_DOUBLE): return Bytecodes::_f2d; 347 348 case SRC_DEST(T_DOUBLE, T_INT): return Bytecodes::_d2i; 349 case SRC_DEST(T_DOUBLE, T_LONG): return Bytecodes::_d2l; 350 case SRC_DEST(T_DOUBLE, T_FLOAT): return Bytecodes::_d2f; 351 } 352 #undef SRC_DEST 353 354 // cannot do it in one step, or at all 355 return Bytecodes::_illegal; 356 } 357 358 359 // ----------------------------------------------------------------------------- 360 // MethodHandleWalker::walk 361 // 362 MethodHandleWalker::ArgToken 363 MethodHandleWalker::walk(TRAPS) { 364 ArgToken empty = ArgToken(); // Empty return value. 365 366 walk_incoming_state(CHECK_(empty)); 367 368 for (;;) { 369 set_method_handle(chain().method_handle_oop()); 370 371 assert(_outgoing_argc == argument_count_slow(), "empty slots under control"); 372 373 if (chain().is_adapter()) { 374 int conv_op = chain().adapter_conversion_op(); 375 int arg_slot = chain().adapter_arg_slot(); 376 377 // Check that the arg_slot is valid. In most cases it must be 378 // within range of the current arguments but there are some 379 // exceptions. Those are sanity checked in their implemention 380 // below. 381 if ((arg_slot < 0 || arg_slot >= _outgoing.length()) && 382 conv_op > java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW && 383 conv_op != java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS && 384 conv_op != java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS) { 385 lose(err_msg("bad argument index %d", arg_slot), CHECK_(empty)); 386 } 387 388 bool retain_original_args = false; // used by fold/collect logic 389 390 // perform the adapter action 391 switch (conv_op) { 392 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY: 393 // No changes to arguments; pass the bits through. 394 break; 395 396 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW: { 397 // To keep the verifier happy, emit bitwise ("raw") conversions as needed. 398 // See MethodHandles::same_basic_type_for_arguments for allowed conversions. 399 Handle incoming_mtype(THREAD, chain().method_type_oop()); 400 Handle outgoing_mtype; 401 { 402 oop outgoing_mh_oop = chain().vmtarget_oop(); 403 if (!java_lang_invoke_MethodHandle::is_instance(outgoing_mh_oop)) 404 lose("outgoing target not a MethodHandle", CHECK_(empty)); 405 outgoing_mtype = Handle(THREAD, java_lang_invoke_MethodHandle::type(outgoing_mh_oop)); 406 } 407 408 int nptypes = java_lang_invoke_MethodType::ptype_count(outgoing_mtype()); 409 if (nptypes != java_lang_invoke_MethodType::ptype_count(incoming_mtype())) 410 lose("incoming and outgoing parameter count do not agree", CHECK_(empty)); 411 412 // Argument types. 413 for (int i = 0, slot = _outgoing.length() - 1; slot >= 0; slot--) { 414 if (arg_type(slot) == T_VOID) continue; 415 416 klassOop src_klass = NULL; 417 klassOop dst_klass = NULL; 418 BasicType src = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(incoming_mtype(), i), &src_klass); 419 BasicType dst = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(outgoing_mtype(), i), &dst_klass); 420 retype_raw_argument_type(src, dst, slot, CHECK_(empty)); 421 i++; // We need to skip void slots at the top of the loop. 422 } 423 424 // Return type. 425 { 426 BasicType src = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(incoming_mtype())); 427 BasicType dst = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(outgoing_mtype())); 428 retype_raw_return_type(src, dst, CHECK_(empty)); 429 } 430 break; 431 } 432 433 case java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST: { 434 // checkcast the Nth outgoing argument in place 435 klassOop dest_klass = NULL; 436 BasicType dest = java_lang_Class::as_BasicType(chain().adapter_arg_oop(), &dest_klass); 437 assert(dest == T_OBJECT, ""); 438 ArgToken arg = _outgoing.at(arg_slot); 439 assert(dest == arg.basic_type(), ""); 440 arg = make_conversion(T_OBJECT, dest_klass, Bytecodes::_checkcast, arg, CHECK_(empty)); 441 // replace the object by the result of the cast, to make the compiler happy: 442 change_argument(T_OBJECT, arg_slot, T_OBJECT, arg); 443 debug_only(dest_klass = (klassOop)badOop); 444 break; 445 } 446 447 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM: { 448 // i2l, etc., on the Nth outgoing argument in place 449 BasicType src = chain().adapter_conversion_src_type(), 450 dest = chain().adapter_conversion_dest_type(); 451 ArgToken arg = _outgoing.at(arg_slot); 452 Bytecodes::Code bc = conversion_code(src, dest); 453 if (bc == Bytecodes::_nop) { 454 break; 455 } else if (bc != Bytecodes::_illegal) { 456 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty)); 457 } else if (is_subword_type(dest)) { 458 bc = conversion_code(src, T_INT); 459 if (bc != Bytecodes::_illegal) { 460 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty)); 461 bc = conversion_code(T_INT, dest); 462 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty)); 463 } 464 } 465 if (bc == Bytecodes::_illegal) { 466 lose(err_msg("bad primitive conversion for %s -> %s", type2name(src), type2name(dest)), CHECK_(empty)); 467 } 468 change_argument(src, arg_slot, dest, arg); 469 break; 470 } 471 472 case java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM: { 473 // checkcast to wrapper type & call intValue, etc. 474 BasicType dest = chain().adapter_conversion_dest_type(); 475 ArgToken arg = _outgoing.at(arg_slot); 476 arg = make_conversion(T_OBJECT, SystemDictionary::box_klass(dest), 477 Bytecodes::_checkcast, arg, CHECK_(empty)); 478 vmIntrinsics::ID unboxer = vmIntrinsics::for_unboxing(dest); 479 if (unboxer == vmIntrinsics::_none) { 480 lose("no unboxing method", CHECK_(empty)); 481 } 482 ArgToken arglist[2]; 483 arglist[0] = arg; // outgoing 'this' 484 arglist[1] = ArgToken(); // sentinel 485 arg = make_invoke(methodHandle(), unboxer, Bytecodes::_invokevirtual, false, 1, &arglist[0], CHECK_(empty)); 486 change_argument(T_OBJECT, arg_slot, dest, arg); 487 break; 488 } 489 490 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF: { 491 // call wrapper type.valueOf 492 BasicType src = chain().adapter_conversion_src_type(); 493 vmIntrinsics::ID boxer = vmIntrinsics::for_boxing(src); 494 if (boxer == vmIntrinsics::_none) { 495 lose("no boxing method", CHECK_(empty)); 496 } 497 ArgToken arg = _outgoing.at(arg_slot); 498 ArgToken arglist[2]; 499 arglist[0] = arg; // outgoing value 500 arglist[1] = ArgToken(); // sentinel 501 arg = make_invoke(methodHandle(), boxer, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK_(empty)); 502 change_argument(src, arg_slot, T_OBJECT, arg); 503 break; 504 } 505 506 case java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS: { 507 int dest_arg_slot = chain().adapter_conversion_vminfo(); 508 if (!has_argument(dest_arg_slot)) { 509 lose("bad swap index", CHECK_(empty)); 510 } 511 // a simple swap between two arguments 512 if (arg_slot > dest_arg_slot) { 513 int tmp = arg_slot; 514 arg_slot = dest_arg_slot; 515 dest_arg_slot = tmp; 516 } 517 ArgToken a1 = _outgoing.at(arg_slot); 518 ArgToken a2 = _outgoing.at(dest_arg_slot); 519 change_argument(a2.basic_type(), dest_arg_slot, a1); 520 change_argument(a1.basic_type(), arg_slot, a2); 521 break; 522 } 523 524 case java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS: { 525 int limit_raw = chain().adapter_conversion_vminfo(); 526 bool rot_down = (arg_slot < limit_raw); 527 int limit_bias = (rot_down ? MethodHandles::OP_ROT_ARGS_DOWN_LIMIT_BIAS : 0); 528 int limit_slot = limit_raw - limit_bias; 529 if ((uint)limit_slot > (uint)_outgoing.length()) { 530 lose("bad rotate index", CHECK_(empty)); 531 } 532 // Rotate the source argument (plus following N slots) into the 533 // position occupied by the dest argument (plus following N slots). 534 int rotate_count = type2size[chain().adapter_conversion_src_type()]; 535 // (no other rotate counts are currently supported) 536 if (rot_down) { 537 for (int i = 0; i < rotate_count; i++) { 538 ArgToken temp = _outgoing.at(arg_slot); 539 _outgoing.remove_at(arg_slot); 540 _outgoing.insert_before(limit_slot - 1, temp); 541 } 542 } else { // arg_slot > limit_slot => rotate_up 543 for (int i = 0; i < rotate_count; i++) { 544 ArgToken temp = _outgoing.at(arg_slot + rotate_count - 1); 545 _outgoing.remove_at(arg_slot + rotate_count - 1); 546 _outgoing.insert_before(limit_slot, temp); 547 } 548 } 549 assert(_outgoing_argc == argument_count_slow(), "empty slots under control"); 550 break; 551 } 552 553 case java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS: { 554 int dup_slots = chain().adapter_conversion_stack_pushes(); 555 if (dup_slots <= 0) { 556 lose("bad dup count", CHECK_(empty)); 557 } 558 for (int i = 0; i < dup_slots; i++) { 559 ArgToken dup = _outgoing.at(arg_slot + 2*i); 560 if (dup.basic_type() != T_VOID) _outgoing_argc += 1; 561 _outgoing.insert_before(i, dup); 562 } 563 assert(_outgoing_argc == argument_count_slow(), "empty slots under control"); 564 break; 565 } 566 567 case java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS: { 568 int drop_slots = -chain().adapter_conversion_stack_pushes(); 569 if (drop_slots <= 0) { 570 lose("bad drop count", CHECK_(empty)); 571 } 572 for (int i = 0; i < drop_slots; i++) { 573 ArgToken drop = _outgoing.at(arg_slot); 574 if (drop.basic_type() != T_VOID) _outgoing_argc -= 1; 575 _outgoing.remove_at(arg_slot); 576 } 577 assert(_outgoing_argc == argument_count_slow(), "empty slots under control"); 578 break; 579 } 580 581 case java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS: 582 retain_original_args = true; // and fall through: 583 case java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS: { 584 // call argument MH recursively 585 //{static int x; if (!x++) print_method_handle(chain().method_handle_oop()); --x;} 586 Handle recursive_mh(THREAD, chain().adapter_arg_oop()); 587 if (!java_lang_invoke_MethodHandle::is_instance(recursive_mh())) { 588 lose("recursive target not a MethodHandle", CHECK_(empty)); 589 } 590 Handle recursive_mtype(THREAD, java_lang_invoke_MethodHandle::type(recursive_mh())); 591 int argc = java_lang_invoke_MethodType::ptype_count(recursive_mtype()); 592 int coll_slots = java_lang_invoke_MethodHandle::vmslots(recursive_mh()); 593 BasicType rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(recursive_mtype())); 594 ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, 1 + argc + 1); // 1+: mh, +1: sentinel 595 arglist[0] = make_oop_constant(recursive_mh(), CHECK_(empty)); 596 if (arg_slot < 0 || coll_slots < 0 || arg_slot + coll_slots > _outgoing.length()) { 597 lose("bad fold/collect arg slot", CHECK_(empty)); 598 } 599 for (int i = 0, slot = arg_slot + coll_slots - 1; slot >= arg_slot; slot--) { 600 ArgToken arg_state = _outgoing.at(slot); 601 BasicType arg_type = arg_state.basic_type(); 602 if (arg_type == T_VOID) continue; 603 ArgToken arg = _outgoing.at(slot); 604 if (i >= argc) { lose("bad fold/collect arg", CHECK_(empty)); } 605 arglist[1+i] = arg; 606 if (!retain_original_args) 607 change_argument(arg_type, slot, T_VOID, ArgToken(tt_void)); 608 i++; 609 } 610 arglist[1+argc] = ArgToken(); // sentinel 611 oop invoker = java_lang_invoke_MethodTypeForm::vmlayout( 612 java_lang_invoke_MethodType::form(recursive_mtype()) ); 613 if (invoker == NULL || !invoker->is_method()) { 614 lose("bad vmlayout slot", CHECK_(empty)); 615 } 616 // FIXME: consider inlining the invokee at the bytecode level 617 ArgToken ret = make_invoke(methodHandle(THREAD, methodOop(invoker)), vmIntrinsics::_invokeGeneric, 618 Bytecodes::_invokevirtual, false, 1+argc, &arglist[0], CHECK_(empty)); 619 // The iid = _invokeGeneric really means to adjust reference types as needed. 620 DEBUG_ONLY(invoker = NULL); 621 if (rtype == T_OBJECT) { 622 klassOop rklass = java_lang_Class::as_klassOop( java_lang_invoke_MethodType::rtype(recursive_mtype()) ); 623 if (rklass != SystemDictionary::Object_klass() && 624 !Klass::cast(rklass)->is_interface()) { 625 // preserve type safety 626 ret = make_conversion(T_OBJECT, rklass, Bytecodes::_checkcast, ret, CHECK_(empty)); 627 } 628 } 629 if (rtype != T_VOID) { 630 int ret_slot = arg_slot + (retain_original_args ? coll_slots : 0); 631 change_argument(T_VOID, ret_slot, rtype, ret); 632 } 633 break; 634 } 635 636 case java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS: { 637 klassOop array_klass_oop = NULL; 638 BasicType array_type = java_lang_Class::as_BasicType(chain().adapter_arg_oop(), 639 &array_klass_oop); 640 assert(array_type == T_OBJECT, ""); 641 assert(Klass::cast(array_klass_oop)->oop_is_array(), ""); 642 arrayKlassHandle array_klass(THREAD, array_klass_oop); 643 debug_only(array_klass_oop = (klassOop)badOop); 644 645 klassOop element_klass_oop = NULL; 646 BasicType element_type = java_lang_Class::as_BasicType(array_klass->component_mirror(), 647 &element_klass_oop); 648 KlassHandle element_klass(THREAD, element_klass_oop); 649 debug_only(element_klass_oop = (klassOop)badOop); 650 651 // Fetch the argument, which we will cast to the required array type. 652 ArgToken arg = _outgoing.at(arg_slot); 653 assert(arg.basic_type() == T_OBJECT, ""); 654 ArgToken array_arg = arg; 655 array_arg = make_conversion(T_OBJECT, array_klass(), Bytecodes::_checkcast, array_arg, CHECK_(empty)); 656 change_argument(T_OBJECT, arg_slot, T_VOID, ArgToken(tt_void)); 657 658 // Check the required length. 659 int spread_slots = 1 + chain().adapter_conversion_stack_pushes(); 660 int spread_length = spread_slots; 661 if (type2size[element_type] == 2) { 662 if (spread_slots % 2 != 0) spread_slots = -1; // force error 663 spread_length = spread_slots / 2; 664 } 665 if (spread_slots < 0) { 666 lose("bad spread length", CHECK_(empty)); 667 } 668 669 jvalue length_jvalue; length_jvalue.i = spread_length; 670 ArgToken length_arg = make_prim_constant(T_INT, &length_jvalue, CHECK_(empty)); 671 // Call a built-in method known to the JVM to validate the length. 672 ArgToken arglist[3]; 673 arglist[0] = array_arg; // value to check 674 arglist[1] = length_arg; // length to check 675 arglist[2] = ArgToken(); // sentinel 676 make_invoke(methodHandle(), vmIntrinsics::_checkSpreadArgument, 677 Bytecodes::_invokestatic, false, 2, &arglist[0], CHECK_(empty)); 678 679 // Spread out the array elements. 680 Bytecodes::Code aload_op = Bytecodes::_nop; 681 switch (element_type) { 682 case T_INT: aload_op = Bytecodes::_iaload; break; 683 case T_LONG: aload_op = Bytecodes::_laload; break; 684 case T_FLOAT: aload_op = Bytecodes::_faload; break; 685 case T_DOUBLE: aload_op = Bytecodes::_daload; break; 686 case T_OBJECT: aload_op = Bytecodes::_aaload; break; 687 case T_BOOLEAN: // fall through: 688 case T_BYTE: aload_op = Bytecodes::_baload; break; 689 case T_CHAR: aload_op = Bytecodes::_caload; break; 690 case T_SHORT: aload_op = Bytecodes::_saload; break; 691 default: lose("primitive array NYI", CHECK_(empty)); 692 } 693 int ap = arg_slot; 694 for (int i = 0; i < spread_length; i++) { 695 jvalue offset_jvalue; offset_jvalue.i = i; 696 ArgToken offset_arg = make_prim_constant(T_INT, &offset_jvalue, CHECK_(empty)); 697 ArgToken element_arg = make_fetch(element_type, element_klass(), aload_op, array_arg, offset_arg, CHECK_(empty)); 698 change_argument(T_VOID, ap, element_type, element_arg); 699 //ap += type2size[element_type]; // don't do this; insert next arg to *right* of previous 700 } 701 break; 702 } 703 704 default: 705 lose("bad adapter conversion", CHECK_(empty)); 706 break; 707 } 708 } 709 710 if (chain().is_bound()) { 711 // push a new argument 712 BasicType arg_type = chain().bound_arg_type(); 713 jint arg_slot = chain().bound_arg_slot(); 714 oop arg_oop = chain().bound_arg_oop(); 715 ArgToken arg; 716 if (arg_type == T_OBJECT) { 717 arg = make_oop_constant(arg_oop, CHECK_(empty)); 718 } else { 719 jvalue arg_value; 720 BasicType bt = java_lang_boxing_object::get_value(arg_oop, &arg_value); 721 if (bt == arg_type || (bt == T_INT && is_subword_type(arg_type))) { 722 arg = make_prim_constant(arg_type, &arg_value, CHECK_(empty)); 723 } else { 724 lose(err_msg("bad bound value: arg_type %s boxing %s", type2name(arg_type), type2name(bt)), CHECK_(empty)); 725 } 726 } 727 DEBUG_ONLY(arg_oop = badOop); 728 change_argument(T_VOID, arg_slot, arg_type, arg); 729 } 730 731 // this test must come after the body of the loop 732 if (!chain().is_last()) { 733 chain().next(CHECK_(empty)); 734 } else { 735 break; 736 } 737 } 738 739 // finish the sequence with a tail-call to the ultimate target 740 // parameters are passed in logical order (recv 1st), not slot order 741 ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, _outgoing.length() + 1); 742 int ap = 0; 743 for (int i = _outgoing.length() - 1; i >= 0; i--) { 744 ArgToken arg_state = _outgoing.at(i); 745 if (arg_state.basic_type() == T_VOID) continue; 746 arglist[ap++] = _outgoing.at(i); 747 } 748 assert(ap == _outgoing_argc, ""); 749 arglist[ap] = ArgToken(); // add a sentinel, for the sake of asserts 750 return make_invoke(chain().last_method(), 751 vmIntrinsics::_none, 752 chain().last_invoke_code(), true, 753 ap, arglist, THREAD); 754 } 755 756 757 // ----------------------------------------------------------------------------- 758 // MethodHandleWalker::walk_incoming_state 759 // 760 void MethodHandleWalker::walk_incoming_state(TRAPS) { 761 Handle mtype(THREAD, chain().method_type_oop()); 762 int nptypes = java_lang_invoke_MethodType::ptype_count(mtype()); 763 _outgoing_argc = nptypes; 764 int argp = nptypes - 1; 765 if (argp >= 0) { 766 _outgoing.at_grow(argp, ArgToken(tt_void)); // presize 767 } 768 for (int i = 0; i < nptypes; i++) { 769 klassOop arg_type_klass = NULL; 770 BasicType arg_type = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(mtype(), i), &arg_type_klass); 771 int index = new_local_index(arg_type); 772 ArgToken arg = make_parameter(arg_type, arg_type_klass, index, CHECK); 773 DEBUG_ONLY(arg_type_klass = (klassOop) NULL); 774 _outgoing.at_put(argp, arg); 775 if (type2size[arg_type] == 2) { 776 // add the extra slot, so we can model the JVM stack 777 _outgoing.insert_before(argp+1, ArgToken(tt_void)); 778 } 779 --argp; 780 } 781 // call make_parameter at the end of the list for the return type 782 klassOop ret_type_klass = NULL; 783 BasicType ret_type = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(mtype()), &ret_type_klass); 784 ArgToken ret = make_parameter(ret_type, ret_type_klass, -1, CHECK); 785 // ignore ret; client can catch it if needed 786 787 assert(_outgoing_argc == argument_count_slow(), "empty slots under control"); 788 789 verify_args_and_signature(CHECK); 790 } 791 792 793 #ifdef ASSERT 794 void MethodHandleWalker::verify_args_and_signature(TRAPS) { 795 int index = _outgoing.length() - 1; 796 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(chain().method_type_oop()); 797 for (int i = 0, limit = ptypes->length(); i < limit; i++) { 798 BasicType t = java_lang_Class::as_BasicType(ptypes->obj_at(i)); 799 if (t == T_ARRAY) t = T_OBJECT; 800 if (t == T_LONG || t == T_DOUBLE) { 801 assert(T_VOID == _outgoing.at(index).basic_type(), "types must match"); 802 index--; 803 } 804 assert(t == _outgoing.at(index).basic_type(), "types must match"); 805 index--; 806 } 807 } 808 #endif 809 810 811 // ----------------------------------------------------------------------------- 812 // MethodHandleWalker::change_argument 813 // 814 // This is messy because some kinds of arguments are paired with 815 // companion slots containing an empty value. 816 void MethodHandleWalker::change_argument(BasicType old_type, int slot, const ArgToken& new_arg) { 817 BasicType new_type = new_arg.basic_type(); 818 int old_size = type2size[old_type]; 819 int new_size = type2size[new_type]; 820 if (old_size == new_size) { 821 // simple case first 822 _outgoing.at_put(slot, new_arg); 823 } else if (old_size > new_size) { 824 for (int i = old_size - 1; i >= new_size; i--) { 825 assert((i != 0) == (_outgoing.at(slot + i).basic_type() == T_VOID), ""); 826 _outgoing.remove_at(slot + i); 827 } 828 if (new_size > 0) 829 _outgoing.at_put(slot, new_arg); 830 else 831 _outgoing_argc -= 1; // deleted a real argument 832 } else { 833 for (int i = old_size; i < new_size; i++) { 834 _outgoing.insert_before(slot + i, ArgToken(tt_void)); 835 } 836 _outgoing.at_put(slot, new_arg); 837 if (old_size == 0) 838 _outgoing_argc += 1; // inserted a real argument 839 } 840 assert(_outgoing_argc == argument_count_slow(), "empty slots under control"); 841 } 842 843 844 #ifdef ASSERT 845 int MethodHandleWalker::argument_count_slow() { 846 int args_seen = 0; 847 for (int i = _outgoing.length() - 1; i >= 0; i--) { 848 if (_outgoing.at(i).basic_type() != T_VOID) { 849 ++args_seen; 850 if (_outgoing.at(i).basic_type() == T_LONG || 851 _outgoing.at(i).basic_type() == T_DOUBLE) { 852 assert(_outgoing.at(i + 1).basic_type() == T_VOID, "should only follow two word"); 853 } 854 } else { 855 assert(_outgoing.at(i - 1).basic_type() == T_LONG || 856 _outgoing.at(i - 1).basic_type() == T_DOUBLE, "should only follow two word"); 857 } 858 } 859 return args_seen; 860 } 861 #endif 862 863 864 // ----------------------------------------------------------------------------- 865 // MethodHandleWalker::retype_raw_conversion 866 // 867 // Do the raw retype conversions for OP_RETYPE_RAW. 868 void MethodHandleWalker::retype_raw_conversion(BasicType src, BasicType dst, bool for_return, int slot, TRAPS) { 869 if (src != dst) { 870 if (MethodHandles::same_basic_type_for_returns(src, dst, /*raw*/ true)) { 871 if (MethodHandles::is_float_fixed_reinterpretation_cast(src, dst)) { 872 vmIntrinsics::ID iid = vmIntrinsics::for_raw_conversion(src, dst); 873 if (iid == vmIntrinsics::_none) { 874 lose("no raw conversion method", CHECK); 875 } 876 ArgToken arglist[2]; 877 if (!for_return) { 878 // argument type conversion 879 ArgToken arg = _outgoing.at(slot); 880 assert(arg.token_type() >= tt_symbolic || src == arg.basic_type(), "sanity"); 881 arglist[0] = arg; // outgoing 'this' 882 arglist[1] = ArgToken(); // sentinel 883 arg = make_invoke(methodHandle(), iid, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK); 884 change_argument(src, slot, dst, arg); 885 } else { 886 // return type conversion 887 if (_return_conv == vmIntrinsics::_none) { 888 _return_conv = iid; 889 } else if (_return_conv == vmIntrinsics::for_raw_conversion(dst, src)) { 890 _return_conv = vmIntrinsics::_none; 891 } else if (_return_conv != zero_return_conv()) { 892 lose(err_msg("requested raw return conversion not allowed: %s -> %s (before %s)", type2name(src), type2name(dst), vmIntrinsics::name_at(_return_conv)), CHECK); 893 } 894 } 895 } else { 896 // Nothing to do. 897 } 898 } else if (for_return && (!is_subword_type(src) || !is_subword_type(dst))) { 899 // This can occur in exception-throwing MHs, which have a fictitious return value encoded as Void or Empty. 900 _return_conv = zero_return_conv(); 901 } else if (src == T_OBJECT && is_java_primitive(dst)) { 902 // ref-to-prim: discard ref, push zero 903 lose("requested ref-to-prim conversion not expected", CHECK); 904 } else { 905 lose(err_msg("requested raw conversion not allowed: %s -> %s", type2name(src), type2name(dst)), CHECK); 906 } 907 } 908 } 909 910 911 // ----------------------------------------------------------------------------- 912 // MethodHandleCompiler 913 914 MethodHandleCompiler::MethodHandleCompiler(Handle root, Symbol* name, Symbol* signature, int invoke_count, bool is_invokedynamic, TRAPS) 915 : MethodHandleWalker(root, is_invokedynamic, THREAD), 916 _invoke_count(invoke_count), 917 _thread(THREAD), 918 _bytecode(THREAD, 50), 919 _constants(THREAD, 10), 920 _non_bcp_klasses(THREAD, 5), 921 _cur_stack(0), 922 _max_stack(0), 923 _rtype(T_ILLEGAL), 924 _selectAlternative_bci(-1), 925 _taken_count(0), 926 _not_taken_count(0) 927 { 928 929 // Element zero is always the null constant. 930 (void) _constants.append(NULL); 931 932 // Set name and signature index. 933 _name_index = cpool_symbol_put(name); 934 _signature_index = cpool_symbol_put(signature); 935 936 // To make the resulting methods more recognizable by 937 // stack walkers and compiler heuristics, 938 // we put them in holder class MethodHandle. 939 // See klass_is_method_handle_adapter_holder 940 // and methodOopDesc::is_method_handle_adapter. 941 _target_klass = SystemDictionaryHandles::MethodHandle_klass(); 942 943 check_non_bcp_klasses(java_lang_invoke_MethodHandle::type(root()), CHECK); 944 945 // Get return type klass. 946 Handle first_mtype(THREAD, chain().method_type_oop()); 947 // _rklass is NULL for primitives. 948 _rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(first_mtype()), &_rklass); 949 if (_rtype == T_ARRAY) _rtype = T_OBJECT; 950 951 ArgumentSizeComputer args(signature); 952 int params = args.size() + 1; // Incoming arguments plus receiver. 953 _num_params = for_invokedynamic() ? params - 1 : params; // XXX Check if callee is static? 954 } 955 956 957 // ----------------------------------------------------------------------------- 958 // MethodHandleCompiler::compile 959 // 960 // Compile this MethodHandle into a bytecode adapter and return a 961 // methodOop. 962 methodHandle MethodHandleCompiler::compile(TRAPS) { 963 assert(_thread == THREAD, "must be same thread"); 964 methodHandle nullHandle; 965 (void) walk(CHECK_(nullHandle)); 966 record_non_bcp_klasses(); 967 return get_method_oop(CHECK_(nullHandle)); 968 } 969 970 971 void MethodHandleCompiler::emit_bc(Bytecodes::Code op, int index, int args_size) { 972 Bytecodes::check(op); // Are we legal? 973 974 switch (op) { 975 // b 976 case Bytecodes::_aconst_null: 977 case Bytecodes::_iconst_m1: 978 case Bytecodes::_iconst_0: 979 case Bytecodes::_iconst_1: 980 case Bytecodes::_iconst_2: 981 case Bytecodes::_iconst_3: 982 case Bytecodes::_iconst_4: 983 case Bytecodes::_iconst_5: 984 case Bytecodes::_lconst_0: 985 case Bytecodes::_lconst_1: 986 case Bytecodes::_fconst_0: 987 case Bytecodes::_fconst_1: 988 case Bytecodes::_fconst_2: 989 case Bytecodes::_dconst_0: 990 case Bytecodes::_dconst_1: 991 case Bytecodes::_iload_0: 992 case Bytecodes::_iload_1: 993 case Bytecodes::_iload_2: 994 case Bytecodes::_iload_3: 995 case Bytecodes::_lload_0: 996 case Bytecodes::_lload_1: 997 case Bytecodes::_lload_2: 998 case Bytecodes::_lload_3: 999 case Bytecodes::_fload_0: 1000 case Bytecodes::_fload_1: 1001 case Bytecodes::_fload_2: 1002 case Bytecodes::_fload_3: 1003 case Bytecodes::_dload_0: 1004 case Bytecodes::_dload_1: 1005 case Bytecodes::_dload_2: 1006 case Bytecodes::_dload_3: 1007 case Bytecodes::_aload_0: 1008 case Bytecodes::_aload_1: 1009 case Bytecodes::_aload_2: 1010 case Bytecodes::_aload_3: 1011 case Bytecodes::_istore_0: 1012 case Bytecodes::_istore_1: 1013 case Bytecodes::_istore_2: 1014 case Bytecodes::_istore_3: 1015 case Bytecodes::_lstore_0: 1016 case Bytecodes::_lstore_1: 1017 case Bytecodes::_lstore_2: 1018 case Bytecodes::_lstore_3: 1019 case Bytecodes::_fstore_0: 1020 case Bytecodes::_fstore_1: 1021 case Bytecodes::_fstore_2: 1022 case Bytecodes::_fstore_3: 1023 case Bytecodes::_dstore_0: 1024 case Bytecodes::_dstore_1: 1025 case Bytecodes::_dstore_2: 1026 case Bytecodes::_dstore_3: 1027 case Bytecodes::_astore_0: 1028 case Bytecodes::_astore_1: 1029 case Bytecodes::_astore_2: 1030 case Bytecodes::_astore_3: 1031 case Bytecodes::_iand: 1032 case Bytecodes::_i2l: 1033 case Bytecodes::_i2f: 1034 case Bytecodes::_i2d: 1035 case Bytecodes::_i2b: 1036 case Bytecodes::_i2c: 1037 case Bytecodes::_i2s: 1038 case Bytecodes::_l2i: 1039 case Bytecodes::_l2f: 1040 case Bytecodes::_l2d: 1041 case Bytecodes::_f2i: 1042 case Bytecodes::_f2l: 1043 case Bytecodes::_f2d: 1044 case Bytecodes::_d2i: 1045 case Bytecodes::_d2l: 1046 case Bytecodes::_d2f: 1047 case Bytecodes::_iaload: 1048 case Bytecodes::_laload: 1049 case Bytecodes::_faload: 1050 case Bytecodes::_daload: 1051 case Bytecodes::_aaload: 1052 case Bytecodes::_baload: 1053 case Bytecodes::_caload: 1054 case Bytecodes::_saload: 1055 case Bytecodes::_ireturn: 1056 case Bytecodes::_lreturn: 1057 case Bytecodes::_freturn: 1058 case Bytecodes::_dreturn: 1059 case Bytecodes::_areturn: 1060 case Bytecodes::_return: 1061 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_b, "wrong bytecode format"); 1062 _bytecode.push(op); 1063 break; 1064 1065 // bi 1066 case Bytecodes::_ldc: 1067 assert(Bytecodes::format_bits(op, false) == (Bytecodes::_fmt_b|Bytecodes::_fmt_has_k), "wrong bytecode format"); 1068 if (index == (index & 0xff)) { 1069 _bytecode.push(op); 1070 _bytecode.push(index); 1071 } else { 1072 _bytecode.push(Bytecodes::_ldc_w); 1073 _bytecode.push(index >> 8); 1074 _bytecode.push(index); 1075 } 1076 break; 1077 1078 case Bytecodes::_iload: 1079 case Bytecodes::_lload: 1080 case Bytecodes::_fload: 1081 case Bytecodes::_dload: 1082 case Bytecodes::_aload: 1083 case Bytecodes::_istore: 1084 case Bytecodes::_lstore: 1085 case Bytecodes::_fstore: 1086 case Bytecodes::_dstore: 1087 case Bytecodes::_astore: 1088 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bi, "wrong bytecode format"); 1089 if (index == (index & 0xff)) { 1090 _bytecode.push(op); 1091 _bytecode.push(index); 1092 } else { 1093 // doesn't fit in a u2 1094 _bytecode.push(Bytecodes::_wide); 1095 _bytecode.push(op); 1096 _bytecode.push(index >> 8); 1097 _bytecode.push(index); 1098 } 1099 break; 1100 1101 // bkk 1102 case Bytecodes::_ldc_w: 1103 case Bytecodes::_ldc2_w: 1104 case Bytecodes::_checkcast: 1105 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bkk, "wrong bytecode format"); 1106 assert((unsigned short) index == index, "index does not fit in 16-bit"); 1107 _bytecode.push(op); 1108 _bytecode.push(index >> 8); 1109 _bytecode.push(index); 1110 break; 1111 1112 // bJJ 1113 case Bytecodes::_invokestatic: 1114 case Bytecodes::_invokespecial: 1115 case Bytecodes::_invokevirtual: 1116 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bJJ, "wrong bytecode format"); 1117 assert((unsigned short) index == index, "index does not fit in 16-bit"); 1118 _bytecode.push(op); 1119 _bytecode.push(index >> 8); 1120 _bytecode.push(index); 1121 break; 1122 1123 case Bytecodes::_invokeinterface: 1124 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bJJ, "wrong bytecode format"); 1125 assert((unsigned short) index == index, "index does not fit in 16-bit"); 1126 assert(args_size > 0, "valid args_size"); 1127 _bytecode.push(op); 1128 _bytecode.push(index >> 8); 1129 _bytecode.push(index); 1130 _bytecode.push(args_size); 1131 _bytecode.push(0); 1132 break; 1133 1134 case Bytecodes::_ifeq: 1135 assert((unsigned short) index == index, "index does not fit in 16-bit"); 1136 _bytecode.push(op); 1137 _bytecode.push(index >> 8); 1138 _bytecode.push(index); 1139 break; 1140 1141 default: 1142 ShouldNotReachHere(); 1143 } 1144 } 1145 1146 void MethodHandleCompiler::update_branch_dest(int src, int dst) { 1147 switch (_bytecode.at(src)) { 1148 case Bytecodes::_ifeq: 1149 dst -= src; // compute the offset 1150 assert((unsigned short) dst == dst, "index does not fit in 16-bit"); 1151 _bytecode.at_put(src + 1, dst >> 8); 1152 _bytecode.at_put(src + 2, dst); 1153 break; 1154 default: 1155 ShouldNotReachHere(); 1156 } 1157 } 1158 1159 void MethodHandleCompiler::emit_load(ArgToken arg) { 1160 TokenType tt = arg.token_type(); 1161 BasicType bt = arg.basic_type(); 1162 1163 switch (tt) { 1164 case tt_parameter: 1165 case tt_temporary: 1166 emit_load(bt, arg.index()); 1167 break; 1168 case tt_constant: 1169 emit_load_constant(arg); 1170 break; 1171 case tt_illegal: 1172 case tt_void: 1173 default: 1174 ShouldNotReachHere(); 1175 } 1176 } 1177 1178 1179 void MethodHandleCompiler::emit_load(BasicType bt, int index) { 1180 if (index <= 3) { 1181 switch (bt) { 1182 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT: 1183 case T_INT: emit_bc(Bytecodes::cast(Bytecodes::_iload_0 + index)); break; 1184 case T_LONG: emit_bc(Bytecodes::cast(Bytecodes::_lload_0 + index)); break; 1185 case T_FLOAT: emit_bc(Bytecodes::cast(Bytecodes::_fload_0 + index)); break; 1186 case T_DOUBLE: emit_bc(Bytecodes::cast(Bytecodes::_dload_0 + index)); break; 1187 case T_OBJECT: emit_bc(Bytecodes::cast(Bytecodes::_aload_0 + index)); break; 1188 default: 1189 ShouldNotReachHere(); 1190 } 1191 } 1192 else { 1193 switch (bt) { 1194 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT: 1195 case T_INT: emit_bc(Bytecodes::_iload, index); break; 1196 case T_LONG: emit_bc(Bytecodes::_lload, index); break; 1197 case T_FLOAT: emit_bc(Bytecodes::_fload, index); break; 1198 case T_DOUBLE: emit_bc(Bytecodes::_dload, index); break; 1199 case T_OBJECT: emit_bc(Bytecodes::_aload, index); break; 1200 default: 1201 ShouldNotReachHere(); 1202 } 1203 } 1204 stack_push(bt); 1205 } 1206 1207 void MethodHandleCompiler::emit_store(BasicType bt, int index) { 1208 if (index <= 3) { 1209 switch (bt) { 1210 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT: 1211 case T_INT: emit_bc(Bytecodes::cast(Bytecodes::_istore_0 + index)); break; 1212 case T_LONG: emit_bc(Bytecodes::cast(Bytecodes::_lstore_0 + index)); break; 1213 case T_FLOAT: emit_bc(Bytecodes::cast(Bytecodes::_fstore_0 + index)); break; 1214 case T_DOUBLE: emit_bc(Bytecodes::cast(Bytecodes::_dstore_0 + index)); break; 1215 case T_OBJECT: emit_bc(Bytecodes::cast(Bytecodes::_astore_0 + index)); break; 1216 default: 1217 ShouldNotReachHere(); 1218 } 1219 } 1220 else { 1221 switch (bt) { 1222 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT: 1223 case T_INT: emit_bc(Bytecodes::_istore, index); break; 1224 case T_LONG: emit_bc(Bytecodes::_lstore, index); break; 1225 case T_FLOAT: emit_bc(Bytecodes::_fstore, index); break; 1226 case T_DOUBLE: emit_bc(Bytecodes::_dstore, index); break; 1227 case T_OBJECT: emit_bc(Bytecodes::_astore, index); break; 1228 default: 1229 ShouldNotReachHere(); 1230 } 1231 } 1232 stack_pop(bt); 1233 } 1234 1235 1236 void MethodHandleCompiler::emit_load_constant(ArgToken arg) { 1237 BasicType bt = arg.basic_type(); 1238 if (is_subword_type(bt)) bt = T_INT; 1239 switch (bt) { 1240 case T_INT: { 1241 jint value = arg.get_jint(); 1242 if (-1 <= value && value <= 5) 1243 emit_bc(Bytecodes::cast(Bytecodes::_iconst_0 + value)); 1244 else 1245 emit_bc(Bytecodes::_ldc, cpool_int_put(value)); 1246 break; 1247 } 1248 case T_LONG: { 1249 jlong value = arg.get_jlong(); 1250 if (0 <= value && value <= 1) 1251 emit_bc(Bytecodes::cast(Bytecodes::_lconst_0 + (int) value)); 1252 else 1253 emit_bc(Bytecodes::_ldc2_w, cpool_long_put(value)); 1254 break; 1255 } 1256 case T_FLOAT: { 1257 jfloat value = arg.get_jfloat(); 1258 if (value == 0.0 || value == 1.0 || value == 2.0) 1259 emit_bc(Bytecodes::cast(Bytecodes::_fconst_0 + (int) value)); 1260 else 1261 emit_bc(Bytecodes::_ldc, cpool_float_put(value)); 1262 break; 1263 } 1264 case T_DOUBLE: { 1265 jdouble value = arg.get_jdouble(); 1266 if (value == 0.0 || value == 1.0) 1267 emit_bc(Bytecodes::cast(Bytecodes::_dconst_0 + (int) value)); 1268 else 1269 emit_bc(Bytecodes::_ldc2_w, cpool_double_put(value)); 1270 break; 1271 } 1272 case T_OBJECT: { 1273 Handle value = arg.object(); 1274 if (value.is_null()) { 1275 emit_bc(Bytecodes::_aconst_null); 1276 break; 1277 } 1278 if (java_lang_Class::is_instance(value())) { 1279 klassOop k = java_lang_Class::as_klassOop(value()); 1280 if (k != NULL) { 1281 emit_bc(Bytecodes::_ldc, cpool_klass_put(k)); 1282 break; 1283 } 1284 } 1285 emit_bc(Bytecodes::_ldc, cpool_object_put(value)); 1286 break; 1287 } 1288 default: 1289 ShouldNotReachHere(); 1290 } 1291 stack_push(bt); 1292 } 1293 1294 1295 MethodHandleWalker::ArgToken 1296 MethodHandleCompiler::make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, 1297 const ArgToken& src, TRAPS) { 1298 1299 BasicType srctype = src.basic_type(); 1300 TokenType tt = src.token_type(); 1301 int index = -1; 1302 1303 switch (op) { 1304 case Bytecodes::_i2l: 1305 case Bytecodes::_i2f: 1306 case Bytecodes::_i2d: 1307 case Bytecodes::_i2b: 1308 case Bytecodes::_i2c: 1309 case Bytecodes::_i2s: 1310 1311 case Bytecodes::_l2i: 1312 case Bytecodes::_l2f: 1313 case Bytecodes::_l2d: 1314 1315 case Bytecodes::_f2i: 1316 case Bytecodes::_f2l: 1317 case Bytecodes::_f2d: 1318 1319 case Bytecodes::_d2i: 1320 case Bytecodes::_d2l: 1321 case Bytecodes::_d2f: 1322 if (tt == tt_constant) { 1323 emit_load_constant(src); 1324 } else { 1325 emit_load(srctype, src.index()); 1326 } 1327 stack_pop(srctype); // pop the src type 1328 emit_bc(op); 1329 stack_push(type); // push the dest value 1330 if (tt != tt_constant) 1331 index = src.index(); 1332 if (srctype != type || index == -1) 1333 index = new_local_index(type); 1334 emit_store(type, index); 1335 break; 1336 1337 case Bytecodes::_checkcast: 1338 if (tt == tt_constant) { 1339 emit_load_constant(src); 1340 } else { 1341 emit_load(srctype, src.index()); 1342 index = src.index(); 1343 } 1344 emit_bc(op, cpool_klass_put(tk)); 1345 check_non_bcp_klass(tk, CHECK_(src)); 1346 // Allocate a new local for the type so that we don't hide the 1347 // previous type from the verifier. 1348 index = new_local_index(type); 1349 emit_store(srctype, index); 1350 break; 1351 1352 case Bytecodes::_nop: 1353 // nothing to do 1354 return src; 1355 1356 default: 1357 if (op == Bytecodes::_illegal) 1358 lose(err_msg("no such primitive conversion: %s -> %s", type2name(src.basic_type()), type2name(type)), THREAD); 1359 else 1360 lose(err_msg("bad primitive conversion op: %s", Bytecodes::name(op)), THREAD); 1361 return make_prim_constant(type, &zero_jvalue, THREAD); 1362 } 1363 1364 return make_parameter(type, tk, index, THREAD); 1365 } 1366 1367 1368 // ----------------------------------------------------------------------------- 1369 // MethodHandleCompiler 1370 // 1371 1372 // Values used by the compiler. 1373 jvalue MethodHandleCompiler::zero_jvalue = { 0 }; 1374 jvalue MethodHandleCompiler::one_jvalue = { 1 }; 1375 1376 // Fetch any values from CountingMethodHandles and capture them for profiles 1377 bool MethodHandleCompiler::fetch_counts(ArgToken arg1, ArgToken arg2) { 1378 int count1 = -1, count2 = -1; 1379 if (arg1.token_type() == tt_constant && arg1.basic_type() == T_OBJECT && 1380 java_lang_invoke_CountingMethodHandle::is_instance(arg1.object()())) { 1381 count1 = java_lang_invoke_CountingMethodHandle::vmcount(arg1.object()()); 1382 } 1383 if (arg2.token_type() == tt_constant && arg2.basic_type() == T_OBJECT && 1384 java_lang_invoke_CountingMethodHandle::is_instance(arg2.object()())) { 1385 count2 = java_lang_invoke_CountingMethodHandle::vmcount(arg2.object()()); 1386 } 1387 int total = count1 + count2; 1388 if (count1 != -1 && count2 != -1 && total != 0) { 1389 // Normalize the collect counts to the invoke_count 1390 tty->print("counts %d %d scaled by %d = ", count2, count1, _invoke_count); 1391 if (count1 != 0) _not_taken_count = (int)(_invoke_count * count1 / (double)total); 1392 if (count2 != 0) _taken_count = (int)(_invoke_count * count2 / (double)total); 1393 tty->print_cr("%d %d", _taken_count, _not_taken_count); 1394 return true; 1395 } 1396 return false; 1397 } 1398 1399 // Emit bytecodes for the given invoke instruction. 1400 MethodHandleWalker::ArgToken 1401 MethodHandleCompiler::make_invoke(methodHandle m, vmIntrinsics::ID iid, 1402 Bytecodes::Code op, bool tailcall, 1403 int argc, MethodHandleWalker::ArgToken* argv, 1404 TRAPS) { 1405 ArgToken zero; 1406 if (m.is_null()) { 1407 // Get the intrinsic methodOop. 1408 m = methodHandle(THREAD, vmIntrinsics::method_for(iid)); 1409 if (m.is_null()) { 1410 lose(vmIntrinsics::name_at(iid), CHECK_(zero)); 1411 } 1412 } 1413 1414 klassOop klass = m->method_holder(); 1415 Symbol* name = m->name(); 1416 Symbol* signature = m->signature(); 1417 1418 if (iid == vmIntrinsics::_invokeGeneric && 1419 argc >= 1 && argv[0].token_type() == tt_constant) { 1420 assert(m->intrinsic_id() == vmIntrinsics::_invokeExact, ""); 1421 Handle receiver = argv[0].object(); 1422 Handle rtype(THREAD, java_lang_invoke_MethodHandle::type(receiver())); 1423 Handle mtype(THREAD, m->method_handle_type()); 1424 if (rtype() != mtype()) { 1425 assert(java_lang_invoke_MethodType::form(rtype()) == 1426 java_lang_invoke_MethodType::form(mtype()), 1427 "must be the same shape"); 1428 // customize m to the exact required rtype 1429 bool has_non_bcp_klass = check_non_bcp_klasses(rtype(), CHECK_(zero)); 1430 TempNewSymbol sig2 = java_lang_invoke_MethodType::as_signature(rtype(), true, CHECK_(zero)); 1431 methodHandle m2; 1432 if (!has_non_bcp_klass) { 1433 methodOop m2_oop = SystemDictionary::find_method_handle_invoke(m->name(), sig2, 1434 KlassHandle(), CHECK_(zero)); 1435 m2 = methodHandle(THREAD, m2_oop); 1436 } 1437 if (m2.is_null()) { 1438 // just build it fresh 1439 m2 = methodOopDesc::make_invoke_method(klass, m->name(), sig2, rtype, CHECK_(zero)); 1440 if (m2.is_null()) 1441 lose(err_msg("no customized invoker %s", sig2->as_utf8()), CHECK_(zero)); 1442 } 1443 m = m2; 1444 signature = m->signature(); 1445 } 1446 } 1447 1448 if (m->intrinsic_id() == vmIntrinsics::_selectAlternative && 1449 fetch_counts(argv[1], argv[2])) { 1450 assert(argc == 3, "three arguments"); 1451 assert(tailcall, "only"); 1452 1453 // do inline bytecodes so we can drop profile data into it, 1454 // 0: iload_0 1455 emit_load(argv[0]); 1456 // 1: ifeq 8 1457 _selectAlternative_bci = _bytecode.length(); 1458 emit_bc(Bytecodes::_ifeq, 0); // emit placeholder offset 1459 // 4: aload_1 1460 emit_load(argv[1]); 1461 // 5: areturn; 1462 emit_bc(Bytecodes::_areturn); 1463 // 8: aload_2 1464 update_branch_dest(_selectAlternative_bci, cur_bci()); 1465 emit_load(argv[2]); 1466 // 9: areturn 1467 emit_bc(Bytecodes::_areturn); 1468 return ArgToken(); // Dummy return value. 1469 } 1470 1471 check_non_bcp_klass(klass, CHECK_(zero)); 1472 if (m->is_method_handle_invoke()) { 1473 check_non_bcp_klasses(m->method_handle_type(), CHECK_(zero)); 1474 } 1475 1476 // Count the number of arguments, not the size 1477 ArgumentCount asc(signature); 1478 assert(argc == asc.size() + ((op == Bytecodes::_invokestatic || op == Bytecodes::_invokedynamic) ? 0 : 1), 1479 "argc mismatch"); 1480 1481 for (int i = 0; i < argc; i++) { 1482 ArgToken arg = argv[i]; 1483 TokenType tt = arg.token_type(); 1484 BasicType bt = arg.basic_type(); 1485 1486 switch (tt) { 1487 case tt_parameter: 1488 case tt_temporary: 1489 emit_load(bt, arg.index()); 1490 break; 1491 case tt_constant: 1492 emit_load_constant(arg); 1493 break; 1494 case tt_illegal: 1495 // Sentinel. 1496 assert(i == (argc - 1), "sentinel must be last entry"); 1497 break; 1498 case tt_void: 1499 default: 1500 ShouldNotReachHere(); 1501 } 1502 } 1503 1504 // Populate constant pool. 1505 int name_index = cpool_symbol_put(name); 1506 int signature_index = cpool_symbol_put(signature); 1507 int name_and_type_index = cpool_name_and_type_put(name_index, signature_index); 1508 int klass_index = cpool_klass_put(klass); 1509 int methodref_index = cpool_methodref_put(op, klass_index, name_and_type_index, m); 1510 1511 // Generate invoke. 1512 switch (op) { 1513 case Bytecodes::_invokestatic: 1514 case Bytecodes::_invokespecial: 1515 case Bytecodes::_invokevirtual: 1516 emit_bc(op, methodref_index); 1517 break; 1518 1519 case Bytecodes::_invokeinterface: { 1520 ArgumentSizeComputer asc(signature); 1521 emit_bc(op, methodref_index, asc.size() + 1); 1522 break; 1523 } 1524 1525 default: 1526 ShouldNotReachHere(); 1527 } 1528 1529 // If tailcall, we have walked all the way to a direct method handle. 1530 // Otherwise, make a recursive call to some helper routine. 1531 BasicType rbt = m->result_type(); 1532 if (rbt == T_ARRAY) rbt = T_OBJECT; 1533 stack_push(rbt); // The return value is already pushed onto the stack. 1534 ArgToken ret; 1535 if (tailcall) { 1536 if (return_conv() == zero_return_conv()) { 1537 rbt = T_VOID; // discard value 1538 } else if (return_conv() != vmIntrinsics::_none) { 1539 // return value conversion 1540 int index = new_local_index(rbt); 1541 emit_store(rbt, index); 1542 ArgToken arglist[2]; 1543 arglist[0] = ArgToken(tt_temporary, rbt, index); 1544 arglist[1] = ArgToken(); // sentinel 1545 ret = make_invoke(methodHandle(), return_conv(), Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK_(zero)); 1546 set_return_conv(vmIntrinsics::_none); 1547 rbt = ret.basic_type(); 1548 emit_load(rbt, ret.index()); 1549 } 1550 if (rbt != _rtype) { 1551 if (rbt == T_VOID) { 1552 // push a zero of the right sort 1553 if (_rtype == T_OBJECT) { 1554 zero = make_oop_constant(NULL, CHECK_(zero)); 1555 } else { 1556 zero = make_prim_constant(_rtype, &zero_jvalue, CHECK_(zero)); 1557 } 1558 emit_load_constant(zero); 1559 } else if (_rtype == T_VOID) { 1560 // We'll emit a _return with something on the stack. 1561 // It's OK to ignore what's on the stack. 1562 } else if (rbt == T_INT && is_subword_type(_rtype)) { 1563 // Convert value to match return type. 1564 switch (_rtype) { 1565 case T_BOOLEAN: { 1566 // boolean is treated as a one-bit unsigned integer. 1567 // Cf. API documentation: java/lang/invoke/MethodHandles.html#explicitCastArguments 1568 ArgToken one = make_prim_constant(T_INT, &one_jvalue, CHECK_(zero)); 1569 emit_load_constant(one); 1570 emit_bc(Bytecodes::_iand); 1571 break; 1572 } 1573 case T_BYTE: emit_bc(Bytecodes::_i2b); break; 1574 case T_CHAR: emit_bc(Bytecodes::_i2c); break; 1575 case T_SHORT: emit_bc(Bytecodes::_i2s); break; 1576 default: ShouldNotReachHere(); 1577 } 1578 } else if (is_subword_type(rbt) && (is_subword_type(_rtype) || (_rtype == T_INT))) { 1579 // The subword type was returned as an int and will be passed 1580 // on as an int. 1581 } else { 1582 lose("unknown conversion", CHECK_(zero)); 1583 } 1584 } 1585 switch (_rtype) { 1586 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT: 1587 case T_INT: emit_bc(Bytecodes::_ireturn); break; 1588 case T_LONG: emit_bc(Bytecodes::_lreturn); break; 1589 case T_FLOAT: emit_bc(Bytecodes::_freturn); break; 1590 case T_DOUBLE: emit_bc(Bytecodes::_dreturn); break; 1591 case T_VOID: emit_bc(Bytecodes::_return); break; 1592 case T_OBJECT: 1593 if (_rklass.not_null() && _rklass() != SystemDictionary::Object_klass() && !Klass::cast(_rklass())->is_interface()) { 1594 emit_bc(Bytecodes::_checkcast, cpool_klass_put(_rklass())); 1595 check_non_bcp_klass(_rklass(), CHECK_(zero)); 1596 } 1597 emit_bc(Bytecodes::_areturn); 1598 break; 1599 default: ShouldNotReachHere(); 1600 } 1601 ret = ArgToken(); // Dummy return value. 1602 } 1603 else { 1604 int index = new_local_index(rbt); 1605 switch (rbt) { 1606 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT: 1607 case T_INT: case T_LONG: case T_FLOAT: case T_DOUBLE: 1608 case T_OBJECT: 1609 emit_store(rbt, index); 1610 ret = ArgToken(tt_temporary, rbt, index); 1611 break; 1612 case T_VOID: 1613 ret = ArgToken(tt_void); 1614 break; 1615 default: 1616 ShouldNotReachHere(); 1617 } 1618 } 1619 1620 return ret; 1621 } 1622 1623 MethodHandleWalker::ArgToken 1624 MethodHandleCompiler::make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, 1625 const MethodHandleWalker::ArgToken& base, 1626 const MethodHandleWalker::ArgToken& offset, 1627 TRAPS) { 1628 switch (base.token_type()) { 1629 case tt_parameter: 1630 case tt_temporary: 1631 emit_load(base.basic_type(), base.index()); 1632 break; 1633 case tt_constant: 1634 emit_load_constant(base); 1635 break; 1636 default: 1637 ShouldNotReachHere(); 1638 } 1639 switch (offset.token_type()) { 1640 case tt_parameter: 1641 case tt_temporary: 1642 emit_load(offset.basic_type(), offset.index()); 1643 break; 1644 case tt_constant: 1645 emit_load_constant(offset); 1646 break; 1647 default: 1648 ShouldNotReachHere(); 1649 } 1650 emit_bc(op); 1651 int index = new_local_index(type); 1652 emit_store(type, index); 1653 return ArgToken(tt_temporary, type, index); 1654 } 1655 1656 1657 int MethodHandleCompiler::cpool_primitive_put(BasicType bt, jvalue* con) { 1658 jvalue con_copy; 1659 assert(bt < T_OBJECT, ""); 1660 if (type2aelembytes(bt) < jintSize) { 1661 // widen to int 1662 con_copy = (*con); 1663 con = &con_copy; 1664 switch (bt) { 1665 case T_BOOLEAN: con->i = (con->z ? 1 : 0); break; 1666 case T_BYTE: con->i = con->b; break; 1667 case T_CHAR: con->i = con->c; break; 1668 case T_SHORT: con->i = con->s; break; 1669 default: ShouldNotReachHere(); 1670 } 1671 bt = T_INT; 1672 } 1673 1674 // for (int i = 1, imax = _constants.length(); i < imax; i++) { 1675 // ConstantValue* con = _constants.at(i); 1676 // if (con != NULL && con->is_primitive() && con.basic_type() == bt) { 1677 // bool match = false; 1678 // switch (type2size[bt]) { 1679 // case 1: if (pcon->_value.i == con->i) match = true; break; 1680 // case 2: if (pcon->_value.j == con->j) match = true; break; 1681 // } 1682 // if (match) 1683 // return i; 1684 // } 1685 // } 1686 ConstantValue* cv = new ConstantValue(bt, *con); 1687 int index = _constants.append(cv); 1688 1689 // long and double entries take 2 slots, we add another empty entry. 1690 if (type2size[bt] == 2) 1691 (void) _constants.append(NULL); 1692 1693 return index; 1694 } 1695 1696 bool MethodHandleCompiler::check_non_bcp_klasses(Handle method_type, TRAPS) { 1697 bool res = false; 1698 for (int i = -1, len = java_lang_invoke_MethodType::ptype_count(method_type()); i < len; i++) { 1699 oop ptype = (i == -1 1700 ? java_lang_invoke_MethodType::rtype(method_type()) 1701 : java_lang_invoke_MethodType::ptype(method_type(), i)); 1702 res |= check_non_bcp_klass(java_lang_Class::as_klassOop(ptype), CHECK_(false)); 1703 } 1704 return res; 1705 } 1706 1707 bool MethodHandleCompiler::check_non_bcp_klass(klassOop klass, TRAPS) { 1708 klass = methodOopDesc::check_non_bcp_klass(klass); 1709 if (klass != NULL) { 1710 Symbol* name = Klass::cast(klass)->name(); 1711 for (int i = _non_bcp_klasses.length() - 1; i >= 0; i--) { 1712 klassOop k2 = _non_bcp_klasses.at(i)(); 1713 if (Klass::cast(k2)->name() == name) { 1714 if (k2 != klass) { 1715 lose(err_msg("unsupported klass name alias %s", name->as_utf8()), THREAD); 1716 } 1717 return true; 1718 } 1719 } 1720 _non_bcp_klasses.append(KlassHandle(THREAD, klass)); 1721 return true; 1722 } 1723 return false; 1724 } 1725 1726 void MethodHandleCompiler::record_non_bcp_klasses() { 1727 // Append extra klasses to constant pool, to guide klass lookup. 1728 for (int k = 0; k < _non_bcp_klasses.length(); k++) { 1729 klassOop non_bcp_klass = _non_bcp_klasses.at(k)(); 1730 bool add_to_cp = true; 1731 for (int j = 1; j < _constants.length(); j++) { 1732 ConstantValue* cv = _constants.at(j); 1733 if (cv != NULL && cv->tag() == JVM_CONSTANT_Class 1734 && cv->klass_oop() == non_bcp_klass) { 1735 add_to_cp = false; 1736 break; 1737 } 1738 } 1739 if (add_to_cp) cpool_klass_put(non_bcp_klass); 1740 } 1741 } 1742 1743 constantPoolHandle MethodHandleCompiler::get_constant_pool(TRAPS) const { 1744 constantPoolHandle nullHandle; 1745 constantPoolOop cpool_oop = oopFactory::new_constantPool(_constants.length(), 1746 oopDesc::IsSafeConc, 1747 CHECK_(nullHandle)); 1748 constantPoolHandle cpool(THREAD, cpool_oop); 1749 1750 // Fill the real constant pool skipping the zero element. 1751 for (int i = 1; i < _constants.length(); i++) { 1752 ConstantValue* cv = _constants.at(i); 1753 switch (cv->tag()) { 1754 case JVM_CONSTANT_Utf8: cpool->symbol_at_put( i, cv->symbol() ); break; 1755 case JVM_CONSTANT_Integer: cpool->int_at_put( i, cv->get_jint() ); break; 1756 case JVM_CONSTANT_Float: cpool->float_at_put( i, cv->get_jfloat() ); break; 1757 case JVM_CONSTANT_Long: cpool->long_at_put( i, cv->get_jlong() ); break; 1758 case JVM_CONSTANT_Double: cpool->double_at_put( i, cv->get_jdouble() ); break; 1759 case JVM_CONSTANT_Class: cpool->klass_at_put( i, cv->klass_oop() ); break; 1760 case JVM_CONSTANT_Methodref: cpool->method_at_put( i, cv->first_index(), cv->second_index()); break; 1761 case JVM_CONSTANT_InterfaceMethodref: 1762 cpool->interface_method_at_put(i, cv->first_index(), cv->second_index()); break; 1763 case JVM_CONSTANT_NameAndType: cpool->name_and_type_at_put(i, cv->first_index(), cv->second_index()); break; 1764 case JVM_CONSTANT_Object: cpool->object_at_put( i, cv->object_oop() ); break; 1765 default: ShouldNotReachHere(); 1766 } 1767 1768 switch (cv->tag()) { 1769 case JVM_CONSTANT_Long: 1770 case JVM_CONSTANT_Double: 1771 i++; // Skip empty entry. 1772 assert(_constants.at(i) == NULL, "empty entry"); 1773 break; 1774 } 1775 } 1776 1777 cpool->set_preresolution(); 1778 1779 // Set the constant pool holder to the target method's class. 1780 cpool->set_pool_holder(_target_klass()); 1781 1782 return cpool; 1783 } 1784 1785 1786 methodHandle MethodHandleCompiler::get_method_oop(TRAPS) { 1787 methodHandle empty; 1788 // Create a method that holds the generated bytecode. invokedynamic 1789 // has no receiver, normal MH calls do. 1790 int flags_bits; 1791 if (for_invokedynamic()) 1792 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC | JVM_ACC_STATIC); 1793 else 1794 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC); 1795 1796 // Create a new method 1797 methodHandle m; 1798 { 1799 methodOop m_oop = oopFactory::new_method(bytecode_length(), 1800 accessFlags_from(flags_bits), 1801 0, 0, 0, oopDesc::IsSafeConc, CHECK_(empty)); 1802 m = methodHandle(THREAD, m_oop); 1803 } 1804 1805 constantPoolHandle cpool = get_constant_pool(CHECK_(empty)); 1806 m->set_constants(cpool()); 1807 1808 m->set_name_index(_name_index); 1809 m->set_signature_index(_signature_index); 1810 1811 m->set_code((address) bytecode()); 1812 1813 m->set_max_stack(_max_stack); 1814 m->set_max_locals(max_locals()); 1815 m->set_size_of_parameters(_num_params); 1816 1817 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); 1818 m->set_exception_table(exception_handlers()); 1819 1820 // Rewrite the method and set up the constant pool cache. 1821 objArrayOop m_array = oopFactory::new_system_objArray(1, CHECK_(empty)); 1822 objArrayHandle methods(THREAD, m_array); 1823 methods->obj_at_put(0, m()); 1824 Rewriter::rewrite(_target_klass(), cpool, methods, CHECK_(empty)); // Use fake class. 1825 Rewriter::relocate_and_link(_target_klass(), methods, CHECK_(empty)); // Use fake class. 1826 1827 // Pre-resolve selected CP cache entries, to avoid problems with class loader scoping. 1828 constantPoolCacheHandle cpc(THREAD, cpool->cache()); 1829 for (int i = 0; i < cpc->length(); i++) { 1830 ConstantPoolCacheEntry* e = cpc->entry_at(i); 1831 assert(!e->is_secondary_entry(), "no indy instructions in here, yet"); 1832 int constant_pool_index = e->constant_pool_index(); 1833 ConstantValue* cv = _constants.at(constant_pool_index); 1834 if (!cv->has_linkage()) continue; 1835 methodHandle m = cv->linkage(); 1836 int index; 1837 switch (cv->tag()) { 1838 case JVM_CONSTANT_Methodref: 1839 index = m->vtable_index(); 1840 if (m->is_static()) { 1841 e->set_method(Bytecodes::_invokestatic, m, index); 1842 } else { 1843 e->set_method(Bytecodes::_invokespecial, m, index); 1844 e->set_method(Bytecodes::_invokevirtual, m, index); 1845 } 1846 break; 1847 case JVM_CONSTANT_InterfaceMethodref: 1848 index = klassItable::compute_itable_index(m()); 1849 e->set_interface_call(m, index); 1850 break; 1851 } 1852 } 1853 1854 // Set the invocation counter's count to the invoke count of the 1855 // original call site. 1856 InvocationCounter* ic = m->invocation_counter(); 1857 ic->set(InvocationCounter::wait_for_compile, _invoke_count); 1858 1859 // Create a new MDO 1860 { 1861 methodDataOop mdo = oopFactory::new_methodData(m, CHECK_(empty)); 1862 assert(m->method_data() == NULL, "there should not be an MDO yet"); 1863 m->set_method_data(mdo); 1864 1865 bool found_selectAlternative = false; 1866 // Iterate over all profile data and set the count of the counter 1867 // data entries to the original call site counter. 1868 for (ProfileData* profile_data = mdo->first_data(); 1869 mdo->is_valid(profile_data); 1870 profile_data = mdo->next_data(profile_data)) { 1871 if (profile_data->is_CounterData()) { 1872 CounterData* counter_data = profile_data->as_CounterData(); 1873 counter_data->set_count(_invoke_count); 1874 } 1875 if (profile_data->is_BranchData() && 1876 profile_data->bci() == _selectAlternative_bci) { 1877 BranchData* bd = profile_data->as_BranchData(); 1878 bd->set_taken(_taken_count); 1879 bd->set_not_taken(_not_taken_count); 1880 found_selectAlternative = true; 1881 } 1882 } 1883 assert(_selectAlternative_bci == -1 || found_selectAlternative, "must have found profile entry"); 1884 } 1885 1886 #ifndef PRODUCT 1887 if (TraceMethodHandles) { 1888 m->print(); 1889 m->print_codes(); 1890 } 1891 #endif //PRODUCT 1892 1893 assert(m->is_method_handle_adapter(), "must be recognized as an adapter"); 1894 return m; 1895 } 1896 1897 1898 #ifndef PRODUCT 1899 1900 // MH printer for debugging. 1901 1902 class MethodHandlePrinter : public MethodHandleWalker { 1903 private: 1904 outputStream* _out; 1905 bool _verbose; 1906 int _temp_num; 1907 int _param_state; 1908 stringStream _strbuf; 1909 const char* strbuf() { 1910 const char* s = _strbuf.as_string(); 1911 _strbuf.reset(); 1912 return s; 1913 } 1914 ArgToken token(const char* str, BasicType type) { 1915 return ArgToken(str, type); 1916 } 1917 const char* string(ArgToken token) { 1918 return token.str(); 1919 } 1920 void start_params() { 1921 _param_state <<= 1; 1922 _out->print("("); 1923 } 1924 void end_params() { 1925 if (_verbose) _out->print("\n"); 1926 _out->print(") => {"); 1927 _param_state >>= 1; 1928 } 1929 void put_type_name(BasicType type, klassOop tk, outputStream* s) { 1930 const char* kname = NULL; 1931 if (tk != NULL) 1932 kname = Klass::cast(tk)->external_name(); 1933 s->print("%s", (kname != NULL) ? kname : type2name(type)); 1934 } 1935 ArgToken maybe_make_temp(const char* statement_op, BasicType type, const char* temp_name) { 1936 const char* value = strbuf(); 1937 if (!_verbose) return token(value, type); 1938 // make an explicit binding for each separate value 1939 _strbuf.print("%s%d", temp_name, ++_temp_num); 1940 const char* temp = strbuf(); 1941 _out->print("\n %s %s %s = %s;", statement_op, type2name(type), temp, value); 1942 return token(temp, type); 1943 } 1944 1945 public: 1946 MethodHandlePrinter(Handle root, bool verbose, outputStream* out, TRAPS) 1947 : MethodHandleWalker(root, false, THREAD), 1948 _out(out), 1949 _verbose(verbose), 1950 _param_state(0), 1951 _temp_num(0) 1952 { 1953 out->print("MethodHandle:"); 1954 java_lang_invoke_MethodType::print_signature(java_lang_invoke_MethodHandle::type(root()), out); 1955 out->print(" : #"); 1956 start_params(); 1957 } 1958 virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) { 1959 if (argnum < 0) { 1960 end_params(); 1961 return token("return", type); 1962 } 1963 if ((_param_state & 1) == 0) { 1964 _param_state |= 1; 1965 _out->print(_verbose ? "\n " : ""); 1966 } else { 1967 _out->print(_verbose ? ",\n " : ", "); 1968 } 1969 if (argnum >= _temp_num) 1970 _temp_num = argnum; 1971 // generate an argument name 1972 _strbuf.print("a%d", argnum); 1973 const char* arg = strbuf(); 1974 put_type_name(type, tk, _out); 1975 _out->print(" %s", arg); 1976 return token(arg, type); 1977 } 1978 virtual ArgToken make_oop_constant(oop con, TRAPS) { 1979 if (con == NULL) 1980 _strbuf.print("null"); 1981 else 1982 con->print_value_on(&_strbuf); 1983 if (_strbuf.size() == 0) { // yuck 1984 _strbuf.print("(a "); 1985 put_type_name(T_OBJECT, con->klass(), &_strbuf); 1986 _strbuf.print(")"); 1987 } 1988 return maybe_make_temp("constant", T_OBJECT, "k"); 1989 } 1990 virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) { 1991 java_lang_boxing_object::print(type, con, &_strbuf); 1992 return maybe_make_temp("constant", type, "k"); 1993 } 1994 void print_bytecode_name(Bytecodes::Code op) { 1995 if (Bytecodes::is_defined(op)) 1996 _strbuf.print("%s", Bytecodes::name(op)); 1997 else 1998 _strbuf.print("bytecode_%d", (int) op); 1999 } 2000 virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS) { 2001 print_bytecode_name(op); 2002 _strbuf.print("(%s", string(src)); 2003 if (tk != NULL) { 2004 _strbuf.print(", "); 2005 put_type_name(type, tk, &_strbuf); 2006 } 2007 _strbuf.print(")"); 2008 return maybe_make_temp("convert", type, "v"); 2009 } 2010 virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS) { 2011 _strbuf.print("%s(%s, %s", Bytecodes::name(op), string(base), string(offset)); 2012 if (tk != NULL) { 2013 _strbuf.print(", "); 2014 put_type_name(type, tk, &_strbuf); 2015 } 2016 _strbuf.print(")"); 2017 return maybe_make_temp("fetch", type, "x"); 2018 } 2019 virtual ArgToken make_invoke(methodHandle m, vmIntrinsics::ID iid, 2020 Bytecodes::Code op, bool tailcall, 2021 int argc, ArgToken* argv, TRAPS) { 2022 Symbol* name; 2023 Symbol* sig; 2024 if (m.not_null()) { 2025 name = m->name(); 2026 sig = m->signature(); 2027 } else { 2028 name = vmSymbols::symbol_at(vmIntrinsics::name_for(iid)); 2029 sig = vmSymbols::symbol_at(vmIntrinsics::signature_for(iid)); 2030 } 2031 _strbuf.print("%s %s%s(", Bytecodes::name(op), name->as_C_string(), sig->as_C_string()); 2032 for (int i = 0; i < argc; i++) { 2033 _strbuf.print("%s%s", (i > 0 ? ", " : ""), string(argv[i])); 2034 } 2035 _strbuf.print(")"); 2036 if (!tailcall) { 2037 BasicType rt = char2type(sig->byte_at(sig->utf8_length()-1)); 2038 if (rt == T_ILLEGAL) rt = T_OBJECT; // ';' at the end of '(...)L...;' 2039 return maybe_make_temp("invoke", rt, "x"); 2040 } else { 2041 const char* ret = strbuf(); 2042 _out->print(_verbose ? "\n return " : " "); 2043 _out->print("%s", ret); 2044 _out->print(_verbose ? "\n}\n" : " }"); 2045 } 2046 return ArgToken(); 2047 } 2048 2049 virtual void set_method_handle(oop mh) { 2050 if (WizardMode && Verbose) { 2051 tty->print("\n--- next target: "); 2052 mh->print(); 2053 } 2054 } 2055 2056 static void print(Handle root, bool verbose, outputStream* out, TRAPS) { 2057 ResourceMark rm; 2058 MethodHandlePrinter printer(root, verbose, out, CHECK); 2059 printer.walk(CHECK); 2060 out->print("\n"); 2061 } 2062 static void print(Handle root, bool verbose = Verbose, outputStream* out = tty) { 2063 Thread* THREAD = Thread::current(); 2064 ResourceMark rm; 2065 MethodHandlePrinter printer(root, verbose, out, THREAD); 2066 if (!HAS_PENDING_EXCEPTION) 2067 printer.walk(THREAD); 2068 if (HAS_PENDING_EXCEPTION) { 2069 oop ex = PENDING_EXCEPTION; 2070 CLEAR_PENDING_EXCEPTION; 2071 out->print(" *** "); 2072 if (printer.lose_message() != NULL) out->print("%s ", printer.lose_message()); 2073 out->print("}"); 2074 } 2075 out->print("\n"); 2076 } 2077 }; 2078 2079 extern "C" 2080 void print_method_handle(oop mh) { 2081 if (!mh->is_oop()) { 2082 tty->print_cr("*** not a method handle: "PTR_FORMAT, (intptr_t)mh); 2083 } else if (java_lang_invoke_MethodHandle::is_instance(mh)) { 2084 MethodHandlePrinter::print(mh); 2085 } else { 2086 tty->print("*** not a method handle: "); 2087 mh->print(); 2088 } 2089 } 2090 2091 #endif // PRODUCT