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src/share/vm/prims/methodHandleWalk.cpp@a735aec54ea4
src/share/vm/prims/methodHandleWalk.cpp
Wed, 14 Mar 2012 20:06:48 -0700
- author
- sspitsyn
- date
- Wed, 14 Mar 2012 20:06:48 -0700
- changeset 3638
- a735aec54ea4
- parent 3198
- a786fdc79c5f
- child 3917
- 8150fa46d2ed
- permissions
- -rw-r--r--
7123170: JCK vm/jvmti/ResourceExhausted/resexh001/resexh00101/ tests fails since 7u4 b02
Summary: The JVMTI ResourceExhausted events must be generated in all places where OOME is thrown
Reviewed-by: acorn, coleenp, dcubed, dholmes, dsamersoff, jwilhelm, tonyp
Contributed-by: serguei.spitsyn@oracle.com
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 */
25 #include "precompiled.hpp"
26 #include "interpreter/rewriter.hpp"
27 #include "memory/oopFactory.hpp"
28 #include "prims/methodHandleWalk.hpp"
30 /*
31 * JSR 292 reference implementation: method handle structure analysis
32 */
34 #ifdef PRODUCT
35 #define print_method_handle(mh) {}
36 #else //PRODUCT
37 extern "C" void print_method_handle(oop mh);
38 #endif //PRODUCT
40 // -----------------------------------------------------------------------------
41 // MethodHandleChain
43 void MethodHandleChain::set_method_handle(Handle mh, TRAPS) {
44 if (!java_lang_invoke_MethodHandle::is_instance(mh())) lose("bad method handle", CHECK);
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
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 }
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 }
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 }
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 }
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 };
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 }
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 }
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 }
207 void MethodHandleChain::print_impl(TRAPS) {
208 ResourceMark rm;
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;
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 }
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 }
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 }
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 }
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 }
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 }
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
320 // -----------------------------------------------------------------------------
321 // MethodHandleWalker
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 }
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;
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;
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;
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
354 // cannot do it in one step, or at all
355 return Bytecodes::_illegal;
356 }
359 // -----------------------------------------------------------------------------
360 // MethodHandleWalker::walk
361 //
362 MethodHandleWalker::ArgToken
363 MethodHandleWalker::walk(TRAPS) {
364 ArgToken empty = ArgToken(); // Empty return value.
366 walk_incoming_state(CHECK_(empty));
368 for (;;) {
369 set_method_handle(chain().method_handle_oop());
371 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
373 if (chain().is_adapter()) {
374 int conv_op = chain().adapter_conversion_op();
375 int arg_slot = chain().adapter_arg_slot();
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 }
388 bool retain_original_args = false; // used by fold/collect logic
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;
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 }
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));
412 // Argument types.
413 for (int i = 0, slot = _outgoing.length() - 1; slot >= 0; slot--) {
414 if (arg_type(slot) == T_VOID) continue;
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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);
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);
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));
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 }
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));
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 }
704 default:
705 lose("bad adapter conversion", CHECK_(empty));
706 break;
707 }
708 }
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 }
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 }
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 }
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
787 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
789 verify_args_and_signature(CHECK);
790 }
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
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 }
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
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 }
911 // -----------------------------------------------------------------------------
912 // MethodHandleCompiler
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 {
929 // Element zero is always the null constant.
930 (void) _constants.append(NULL);
932 // Set name and signature index.
933 _name_index = cpool_symbol_put(name);
934 _signature_index = cpool_symbol_put(signature);
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();
943 check_non_bcp_klasses(java_lang_invoke_MethodHandle::type(root()), CHECK);
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;
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 }
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 }
971 void MethodHandleCompiler::emit_bc(Bytecodes::Code op, int index, int args_size) {
972 Bytecodes::check(op); // Are we legal?
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;
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;
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;
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;
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;
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;
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;
1141 default:
1142 ShouldNotReachHere();
1143 }
1144 }
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 }
1159 void MethodHandleCompiler::emit_load(ArgToken arg) {
1160 TokenType tt = arg.token_type();
1161 BasicType bt = arg.basic_type();
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 }
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 }
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 }
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 }
1295 MethodHandleWalker::ArgToken
1296 MethodHandleCompiler::make_conversion(BasicType type, klassOop tk, Bytecodes::Code op,
1297 const ArgToken& src, TRAPS) {
1299 BasicType srctype = src.basic_type();
1300 TokenType tt = src.token_type();
1301 int index = -1;
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:
1311 case Bytecodes::_l2i:
1312 case Bytecodes::_l2f:
1313 case Bytecodes::_l2d:
1315 case Bytecodes::_f2i:
1316 case Bytecodes::_f2l:
1317 case Bytecodes::_f2d:
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;
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;
1352 case Bytecodes::_nop:
1353 // nothing to do
1354 return src;
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 }
1364 return make_parameter(type, tk, index, THREAD);
1365 }
1368 // -----------------------------------------------------------------------------
1369 // MethodHandleCompiler
1370 //
1372 // Values used by the compiler.
1373 jvalue MethodHandleCompiler::zero_jvalue = { 0 };
1374 jvalue MethodHandleCompiler::one_jvalue = { 1 };
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 if (count1 != 0) _not_taken_count = (int)(_invoke_count * count1 / (double)total);
1391 if (count2 != 0) _taken_count = (int)(_invoke_count * count2 / (double)total);
1392 return true;
1393 }
1394 return false;
1395 }
1397 // Emit bytecodes for the given invoke instruction.
1398 MethodHandleWalker::ArgToken
1399 MethodHandleCompiler::make_invoke(methodHandle m, vmIntrinsics::ID iid,
1400 Bytecodes::Code op, bool tailcall,
1401 int argc, MethodHandleWalker::ArgToken* argv,
1402 TRAPS) {
1403 ArgToken zero;
1404 if (m.is_null()) {
1405 // Get the intrinsic methodOop.
1406 m = methodHandle(THREAD, vmIntrinsics::method_for(iid));
1407 if (m.is_null()) {
1408 lose(vmIntrinsics::name_at(iid), CHECK_(zero));
1409 }
1410 }
1412 klassOop klass = m->method_holder();
1413 Symbol* name = m->name();
1414 Symbol* signature = m->signature();
1416 if (iid == vmIntrinsics::_invokeGeneric &&
1417 argc >= 1 && argv[0].token_type() == tt_constant) {
1418 assert(m->intrinsic_id() == vmIntrinsics::_invokeExact, "");
1419 Handle receiver = argv[0].object();
1420 Handle rtype(THREAD, java_lang_invoke_MethodHandle::type(receiver()));
1421 Handle mtype(THREAD, m->method_handle_type());
1422 if (rtype() != mtype()) {
1423 assert(java_lang_invoke_MethodType::form(rtype()) ==
1424 java_lang_invoke_MethodType::form(mtype()),
1425 "must be the same shape");
1426 // customize m to the exact required rtype
1427 bool has_non_bcp_klass = check_non_bcp_klasses(rtype(), CHECK_(zero));
1428 TempNewSymbol sig2 = java_lang_invoke_MethodType::as_signature(rtype(), true, CHECK_(zero));
1429 methodHandle m2;
1430 if (!has_non_bcp_klass) {
1431 methodOop m2_oop = SystemDictionary::find_method_handle_invoke(m->name(), sig2,
1432 KlassHandle(), CHECK_(zero));
1433 m2 = methodHandle(THREAD, m2_oop);
1434 }
1435 if (m2.is_null()) {
1436 // just build it fresh
1437 m2 = methodOopDesc::make_invoke_method(klass, m->name(), sig2, rtype, CHECK_(zero));
1438 if (m2.is_null())
1439 lose(err_msg("no customized invoker %s", sig2->as_utf8()), CHECK_(zero));
1440 }
1441 m = m2;
1442 signature = m->signature();
1443 }
1444 }
1446 if (m->intrinsic_id() == vmIntrinsics::_selectAlternative &&
1447 fetch_counts(argv[1], argv[2])) {
1448 assert(argc == 3, "three arguments");
1449 assert(tailcall, "only");
1451 // do inline bytecodes so we can drop profile data into it,
1452 // 0: iload_0
1453 emit_load(argv[0]);
1454 // 1: ifeq 8
1455 _selectAlternative_bci = _bytecode.length();
1456 emit_bc(Bytecodes::_ifeq, 0); // emit placeholder offset
1457 // 4: aload_1
1458 emit_load(argv[1]);
1459 // 5: areturn;
1460 emit_bc(Bytecodes::_areturn);
1461 // 8: aload_2
1462 update_branch_dest(_selectAlternative_bci, cur_bci());
1463 emit_load(argv[2]);
1464 // 9: areturn
1465 emit_bc(Bytecodes::_areturn);
1466 return ArgToken(); // Dummy return value.
1467 }
1469 check_non_bcp_klass(klass, CHECK_(zero));
1470 if (m->is_method_handle_invoke()) {
1471 check_non_bcp_klasses(m->method_handle_type(), CHECK_(zero));
1472 }
1474 // Count the number of arguments, not the size
1475 ArgumentCount asc(signature);
1476 assert(argc == asc.size() + ((op == Bytecodes::_invokestatic || op == Bytecodes::_invokedynamic) ? 0 : 1),
1477 "argc mismatch");
1479 for (int i = 0; i < argc; i++) {
1480 ArgToken arg = argv[i];
1481 TokenType tt = arg.token_type();
1482 BasicType bt = arg.basic_type();
1484 switch (tt) {
1485 case tt_parameter:
1486 case tt_temporary:
1487 emit_load(bt, arg.index());
1488 break;
1489 case tt_constant:
1490 emit_load_constant(arg);
1491 break;
1492 case tt_illegal:
1493 // Sentinel.
1494 assert(i == (argc - 1), "sentinel must be last entry");
1495 break;
1496 case tt_void:
1497 default:
1498 ShouldNotReachHere();
1499 }
1500 }
1502 // Populate constant pool.
1503 int name_index = cpool_symbol_put(name);
1504 int signature_index = cpool_symbol_put(signature);
1505 int name_and_type_index = cpool_name_and_type_put(name_index, signature_index);
1506 int klass_index = cpool_klass_put(klass);
1507 int methodref_index = cpool_methodref_put(op, klass_index, name_and_type_index, m);
1509 // Generate invoke.
1510 switch (op) {
1511 case Bytecodes::_invokestatic:
1512 case Bytecodes::_invokespecial:
1513 case Bytecodes::_invokevirtual:
1514 emit_bc(op, methodref_index);
1515 break;
1517 case Bytecodes::_invokeinterface: {
1518 ArgumentSizeComputer asc(signature);
1519 emit_bc(op, methodref_index, asc.size() + 1);
1520 break;
1521 }
1523 default:
1524 ShouldNotReachHere();
1525 }
1527 // If tailcall, we have walked all the way to a direct method handle.
1528 // Otherwise, make a recursive call to some helper routine.
1529 BasicType rbt = m->result_type();
1530 if (rbt == T_ARRAY) rbt = T_OBJECT;
1531 stack_push(rbt); // The return value is already pushed onto the stack.
1532 ArgToken ret;
1533 if (tailcall) {
1534 if (return_conv() == zero_return_conv()) {
1535 rbt = T_VOID; // discard value
1536 } else if (return_conv() != vmIntrinsics::_none) {
1537 // return value conversion
1538 int index = new_local_index(rbt);
1539 emit_store(rbt, index);
1540 ArgToken arglist[2];
1541 arglist[0] = ArgToken(tt_temporary, rbt, index);
1542 arglist[1] = ArgToken(); // sentinel
1543 ret = make_invoke(methodHandle(), return_conv(), Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK_(zero));
1544 set_return_conv(vmIntrinsics::_none);
1545 rbt = ret.basic_type();
1546 emit_load(rbt, ret.index());
1547 }
1548 if (rbt != _rtype) {
1549 if (rbt == T_VOID) {
1550 // push a zero of the right sort
1551 if (_rtype == T_OBJECT) {
1552 zero = make_oop_constant(NULL, CHECK_(zero));
1553 } else {
1554 zero = make_prim_constant(_rtype, &zero_jvalue, CHECK_(zero));
1555 }
1556 emit_load_constant(zero);
1557 } else if (_rtype == T_VOID) {
1558 // We'll emit a _return with something on the stack.
1559 // It's OK to ignore what's on the stack.
1560 } else if (rbt == T_INT && is_subword_type(_rtype)) {
1561 // Convert value to match return type.
1562 switch (_rtype) {
1563 case T_BOOLEAN: {
1564 // boolean is treated as a one-bit unsigned integer.
1565 // Cf. API documentation: java/lang/invoke/MethodHandles.html#explicitCastArguments
1566 ArgToken one = make_prim_constant(T_INT, &one_jvalue, CHECK_(zero));
1567 emit_load_constant(one);
1568 emit_bc(Bytecodes::_iand);
1569 break;
1570 }
1571 case T_BYTE: emit_bc(Bytecodes::_i2b); break;
1572 case T_CHAR: emit_bc(Bytecodes::_i2c); break;
1573 case T_SHORT: emit_bc(Bytecodes::_i2s); break;
1574 default: ShouldNotReachHere();
1575 }
1576 } else if (is_subword_type(rbt) && (is_subword_type(_rtype) || (_rtype == T_INT))) {
1577 // The subword type was returned as an int and will be passed
1578 // on as an int.
1579 } else {
1580 lose("unknown conversion", CHECK_(zero));
1581 }
1582 }
1583 switch (_rtype) {
1584 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1585 case T_INT: emit_bc(Bytecodes::_ireturn); break;
1586 case T_LONG: emit_bc(Bytecodes::_lreturn); break;
1587 case T_FLOAT: emit_bc(Bytecodes::_freturn); break;
1588 case T_DOUBLE: emit_bc(Bytecodes::_dreturn); break;
1589 case T_VOID: emit_bc(Bytecodes::_return); break;
1590 case T_OBJECT:
1591 if (_rklass.not_null() && _rklass() != SystemDictionary::Object_klass() && !Klass::cast(_rklass())->is_interface()) {
1592 emit_bc(Bytecodes::_checkcast, cpool_klass_put(_rklass()));
1593 check_non_bcp_klass(_rklass(), CHECK_(zero));
1594 }
1595 emit_bc(Bytecodes::_areturn);
1596 break;
1597 default: ShouldNotReachHere();
1598 }
1599 ret = ArgToken(); // Dummy return value.
1600 }
1601 else {
1602 int index = new_local_index(rbt);
1603 switch (rbt) {
1604 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1605 case T_INT: case T_LONG: case T_FLOAT: case T_DOUBLE:
1606 case T_OBJECT:
1607 emit_store(rbt, index);
1608 ret = ArgToken(tt_temporary, rbt, index);
1609 break;
1610 case T_VOID:
1611 ret = ArgToken(tt_void);
1612 break;
1613 default:
1614 ShouldNotReachHere();
1615 }
1616 }
1618 return ret;
1619 }
1621 MethodHandleWalker::ArgToken
1622 MethodHandleCompiler::make_fetch(BasicType type, klassOop tk, Bytecodes::Code op,
1623 const MethodHandleWalker::ArgToken& base,
1624 const MethodHandleWalker::ArgToken& offset,
1625 TRAPS) {
1626 switch (base.token_type()) {
1627 case tt_parameter:
1628 case tt_temporary:
1629 emit_load(base.basic_type(), base.index());
1630 break;
1631 case tt_constant:
1632 emit_load_constant(base);
1633 break;
1634 default:
1635 ShouldNotReachHere();
1636 }
1637 switch (offset.token_type()) {
1638 case tt_parameter:
1639 case tt_temporary:
1640 emit_load(offset.basic_type(), offset.index());
1641 break;
1642 case tt_constant:
1643 emit_load_constant(offset);
1644 break;
1645 default:
1646 ShouldNotReachHere();
1647 }
1648 emit_bc(op);
1649 int index = new_local_index(type);
1650 emit_store(type, index);
1651 return ArgToken(tt_temporary, type, index);
1652 }
1655 int MethodHandleCompiler::cpool_primitive_put(BasicType bt, jvalue* con) {
1656 jvalue con_copy;
1657 assert(bt < T_OBJECT, "");
1658 if (type2aelembytes(bt) < jintSize) {
1659 // widen to int
1660 con_copy = (*con);
1661 con = &con_copy;
1662 switch (bt) {
1663 case T_BOOLEAN: con->i = (con->z ? 1 : 0); break;
1664 case T_BYTE: con->i = con->b; break;
1665 case T_CHAR: con->i = con->c; break;
1666 case T_SHORT: con->i = con->s; break;
1667 default: ShouldNotReachHere();
1668 }
1669 bt = T_INT;
1670 }
1672 // for (int i = 1, imax = _constants.length(); i < imax; i++) {
1673 // ConstantValue* con = _constants.at(i);
1674 // if (con != NULL && con->is_primitive() && con.basic_type() == bt) {
1675 // bool match = false;
1676 // switch (type2size[bt]) {
1677 // case 1: if (pcon->_value.i == con->i) match = true; break;
1678 // case 2: if (pcon->_value.j == con->j) match = true; break;
1679 // }
1680 // if (match)
1681 // return i;
1682 // }
1683 // }
1684 ConstantValue* cv = new ConstantValue(bt, *con);
1685 int index = _constants.append(cv);
1687 // long and double entries take 2 slots, we add another empty entry.
1688 if (type2size[bt] == 2)
1689 (void) _constants.append(NULL);
1691 return index;
1692 }
1694 bool MethodHandleCompiler::check_non_bcp_klasses(Handle method_type, TRAPS) {
1695 bool res = false;
1696 for (int i = -1, len = java_lang_invoke_MethodType::ptype_count(method_type()); i < len; i++) {
1697 oop ptype = (i == -1
1698 ? java_lang_invoke_MethodType::rtype(method_type())
1699 : java_lang_invoke_MethodType::ptype(method_type(), i));
1700 res |= check_non_bcp_klass(java_lang_Class::as_klassOop(ptype), CHECK_(false));
1701 }
1702 return res;
1703 }
1705 bool MethodHandleCompiler::check_non_bcp_klass(klassOop klass, TRAPS) {
1706 klass = methodOopDesc::check_non_bcp_klass(klass);
1707 if (klass != NULL) {
1708 Symbol* name = Klass::cast(klass)->name();
1709 for (int i = _non_bcp_klasses.length() - 1; i >= 0; i--) {
1710 klassOop k2 = _non_bcp_klasses.at(i)();
1711 if (Klass::cast(k2)->name() == name) {
1712 if (k2 != klass) {
1713 lose(err_msg("unsupported klass name alias %s", name->as_utf8()), THREAD);
1714 }
1715 return true;
1716 }
1717 }
1718 _non_bcp_klasses.append(KlassHandle(THREAD, klass));
1719 return true;
1720 }
1721 return false;
1722 }
1724 void MethodHandleCompiler::record_non_bcp_klasses() {
1725 // Append extra klasses to constant pool, to guide klass lookup.
1726 for (int k = 0; k < _non_bcp_klasses.length(); k++) {
1727 klassOop non_bcp_klass = _non_bcp_klasses.at(k)();
1728 bool add_to_cp = true;
1729 for (int j = 1; j < _constants.length(); j++) {
1730 ConstantValue* cv = _constants.at(j);
1731 if (cv != NULL && cv->tag() == JVM_CONSTANT_Class
1732 && cv->klass_oop() == non_bcp_klass) {
1733 add_to_cp = false;
1734 break;
1735 }
1736 }
1737 if (add_to_cp) cpool_klass_put(non_bcp_klass);
1738 }
1739 }
1741 constantPoolHandle MethodHandleCompiler::get_constant_pool(TRAPS) const {
1742 constantPoolHandle nullHandle;
1743 constantPoolOop cpool_oop = oopFactory::new_constantPool(_constants.length(),
1744 oopDesc::IsSafeConc,
1745 CHECK_(nullHandle));
1746 constantPoolHandle cpool(THREAD, cpool_oop);
1748 // Fill the real constant pool skipping the zero element.
1749 for (int i = 1; i < _constants.length(); i++) {
1750 ConstantValue* cv = _constants.at(i);
1751 switch (cv->tag()) {
1752 case JVM_CONSTANT_Utf8: cpool->symbol_at_put( i, cv->symbol() ); break;
1753 case JVM_CONSTANT_Integer: cpool->int_at_put( i, cv->get_jint() ); break;
1754 case JVM_CONSTANT_Float: cpool->float_at_put( i, cv->get_jfloat() ); break;
1755 case JVM_CONSTANT_Long: cpool->long_at_put( i, cv->get_jlong() ); break;
1756 case JVM_CONSTANT_Double: cpool->double_at_put( i, cv->get_jdouble() ); break;
1757 case JVM_CONSTANT_Class: cpool->klass_at_put( i, cv->klass_oop() ); break;
1758 case JVM_CONSTANT_Methodref: cpool->method_at_put( i, cv->first_index(), cv->second_index()); break;
1759 case JVM_CONSTANT_InterfaceMethodref:
1760 cpool->interface_method_at_put(i, cv->first_index(), cv->second_index()); break;
1761 case JVM_CONSTANT_NameAndType: cpool->name_and_type_at_put(i, cv->first_index(), cv->second_index()); break;
1762 case JVM_CONSTANT_Object: cpool->object_at_put( i, cv->object_oop() ); break;
1763 default: ShouldNotReachHere();
1764 }
1766 switch (cv->tag()) {
1767 case JVM_CONSTANT_Long:
1768 case JVM_CONSTANT_Double:
1769 i++; // Skip empty entry.
1770 assert(_constants.at(i) == NULL, "empty entry");
1771 break;
1772 }
1773 }
1775 cpool->set_preresolution();
1777 // Set the constant pool holder to the target method's class.
1778 cpool->set_pool_holder(_target_klass());
1780 return cpool;
1781 }
1784 methodHandle MethodHandleCompiler::get_method_oop(TRAPS) {
1785 methodHandle empty;
1786 // Create a method that holds the generated bytecode. invokedynamic
1787 // has no receiver, normal MH calls do.
1788 int flags_bits;
1789 if (for_invokedynamic())
1790 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC | JVM_ACC_STATIC);
1791 else
1792 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC);
1794 // Create a new method
1795 methodHandle m;
1796 {
1797 methodOop m_oop = oopFactory::new_method(bytecode_length(),
1798 accessFlags_from(flags_bits),
1799 0, 0, 0, oopDesc::IsSafeConc, CHECK_(empty));
1800 m = methodHandle(THREAD, m_oop);
1801 }
1803 constantPoolHandle cpool = get_constant_pool(CHECK_(empty));
1804 m->set_constants(cpool());
1806 m->set_name_index(_name_index);
1807 m->set_signature_index(_signature_index);
1809 m->set_code((address) bytecode());
1811 m->set_max_stack(_max_stack);
1812 m->set_max_locals(max_locals());
1813 m->set_size_of_parameters(_num_params);
1815 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1816 m->set_exception_table(exception_handlers());
1818 // Rewrite the method and set up the constant pool cache.
1819 objArrayOop m_array = oopFactory::new_system_objArray(1, CHECK_(empty));
1820 objArrayHandle methods(THREAD, m_array);
1821 methods->obj_at_put(0, m());
1822 Rewriter::rewrite(_target_klass(), cpool, methods, CHECK_(empty)); // Use fake class.
1823 Rewriter::relocate_and_link(_target_klass(), methods, CHECK_(empty)); // Use fake class.
1825 // Pre-resolve selected CP cache entries, to avoid problems with class loader scoping.
1826 constantPoolCacheHandle cpc(THREAD, cpool->cache());
1827 for (int i = 0; i < cpc->length(); i++) {
1828 ConstantPoolCacheEntry* e = cpc->entry_at(i);
1829 assert(!e->is_secondary_entry(), "no indy instructions in here, yet");
1830 int constant_pool_index = e->constant_pool_index();
1831 ConstantValue* cv = _constants.at(constant_pool_index);
1832 if (!cv->has_linkage()) continue;
1833 methodHandle m = cv->linkage();
1834 int index;
1835 switch (cv->tag()) {
1836 case JVM_CONSTANT_Methodref:
1837 index = m->vtable_index();
1838 if (m->is_static()) {
1839 e->set_method(Bytecodes::_invokestatic, m, index);
1840 } else {
1841 e->set_method(Bytecodes::_invokespecial, m, index);
1842 e->set_method(Bytecodes::_invokevirtual, m, index);
1843 }
1844 break;
1845 case JVM_CONSTANT_InterfaceMethodref:
1846 index = klassItable::compute_itable_index(m());
1847 e->set_interface_call(m, index);
1848 break;
1849 }
1850 }
1852 // Set the invocation counter's count to the invoke count of the
1853 // original call site.
1854 InvocationCounter* ic = m->invocation_counter();
1855 ic->set(InvocationCounter::wait_for_compile, _invoke_count);
1857 // Create a new MDO
1858 {
1859 methodDataOop mdo = oopFactory::new_methodData(m, CHECK_(empty));
1860 assert(m->method_data() == NULL, "there should not be an MDO yet");
1861 m->set_method_data(mdo);
1863 bool found_selectAlternative = false;
1864 // Iterate over all profile data and set the count of the counter
1865 // data entries to the original call site counter.
1866 for (ProfileData* profile_data = mdo->first_data();
1867 mdo->is_valid(profile_data);
1868 profile_data = mdo->next_data(profile_data)) {
1869 if (profile_data->is_CounterData()) {
1870 CounterData* counter_data = profile_data->as_CounterData();
1871 counter_data->set_count(_invoke_count);
1872 }
1873 if (profile_data->is_BranchData() &&
1874 profile_data->bci() == _selectAlternative_bci) {
1875 BranchData* bd = profile_data->as_BranchData();
1876 bd->set_taken(_taken_count);
1877 bd->set_not_taken(_not_taken_count);
1878 found_selectAlternative = true;
1879 }
1880 }
1881 assert(_selectAlternative_bci == -1 || found_selectAlternative, "must have found profile entry");
1882 }
1884 #ifndef PRODUCT
1885 if (TraceMethodHandles) {
1886 m->print();
1887 m->print_codes();
1888 }
1889 #endif //PRODUCT
1891 assert(m->is_method_handle_adapter(), "must be recognized as an adapter");
1892 return m;
1893 }
1896 #ifndef PRODUCT
1898 // MH printer for debugging.
1900 class MethodHandlePrinter : public MethodHandleWalker {
1901 private:
1902 outputStream* _out;
1903 bool _verbose;
1904 int _temp_num;
1905 int _param_state;
1906 stringStream _strbuf;
1907 const char* strbuf() {
1908 const char* s = _strbuf.as_string();
1909 _strbuf.reset();
1910 return s;
1911 }
1912 ArgToken token(const char* str, BasicType type) {
1913 return ArgToken(str, type);
1914 }
1915 const char* string(ArgToken token) {
1916 return token.str();
1917 }
1918 void start_params() {
1919 _param_state <<= 1;
1920 _out->print("(");
1921 }
1922 void end_params() {
1923 if (_verbose) _out->print("\n");
1924 _out->print(") => {");
1925 _param_state >>= 1;
1926 }
1927 void put_type_name(BasicType type, klassOop tk, outputStream* s) {
1928 const char* kname = NULL;
1929 if (tk != NULL)
1930 kname = Klass::cast(tk)->external_name();
1931 s->print("%s", (kname != NULL) ? kname : type2name(type));
1932 }
1933 ArgToken maybe_make_temp(const char* statement_op, BasicType type, const char* temp_name) {
1934 const char* value = strbuf();
1935 if (!_verbose) return token(value, type);
1936 // make an explicit binding for each separate value
1937 _strbuf.print("%s%d", temp_name, ++_temp_num);
1938 const char* temp = strbuf();
1939 _out->print("\n %s %s %s = %s;", statement_op, type2name(type), temp, value);
1940 return token(temp, type);
1941 }
1943 public:
1944 MethodHandlePrinter(Handle root, bool verbose, outputStream* out, TRAPS)
1945 : MethodHandleWalker(root, false, THREAD),
1946 _out(out),
1947 _verbose(verbose),
1948 _param_state(0),
1949 _temp_num(0)
1950 {
1951 out->print("MethodHandle:");
1952 java_lang_invoke_MethodType::print_signature(java_lang_invoke_MethodHandle::type(root()), out);
1953 out->print(" : #");
1954 start_params();
1955 }
1956 virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
1957 if (argnum < 0) {
1958 end_params();
1959 return token("return", type);
1960 }
1961 if ((_param_state & 1) == 0) {
1962 _param_state |= 1;
1963 _out->print(_verbose ? "\n " : "");
1964 } else {
1965 _out->print(_verbose ? ",\n " : ", ");
1966 }
1967 if (argnum >= _temp_num)
1968 _temp_num = argnum;
1969 // generate an argument name
1970 _strbuf.print("a%d", argnum);
1971 const char* arg = strbuf();
1972 put_type_name(type, tk, _out);
1973 _out->print(" %s", arg);
1974 return token(arg, type);
1975 }
1976 virtual ArgToken make_oop_constant(oop con, TRAPS) {
1977 if (con == NULL)
1978 _strbuf.print("null");
1979 else
1980 con->print_value_on(&_strbuf);
1981 if (_strbuf.size() == 0) { // yuck
1982 _strbuf.print("(a ");
1983 put_type_name(T_OBJECT, con->klass(), &_strbuf);
1984 _strbuf.print(")");
1985 }
1986 return maybe_make_temp("constant", T_OBJECT, "k");
1987 }
1988 virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
1989 java_lang_boxing_object::print(type, con, &_strbuf);
1990 return maybe_make_temp("constant", type, "k");
1991 }
1992 void print_bytecode_name(Bytecodes::Code op) {
1993 if (Bytecodes::is_defined(op))
1994 _strbuf.print("%s", Bytecodes::name(op));
1995 else
1996 _strbuf.print("bytecode_%d", (int) op);
1997 }
1998 virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS) {
1999 print_bytecode_name(op);
2000 _strbuf.print("(%s", string(src));
2001 if (tk != NULL) {
2002 _strbuf.print(", ");
2003 put_type_name(type, tk, &_strbuf);
2004 }
2005 _strbuf.print(")");
2006 return maybe_make_temp("convert", type, "v");
2007 }
2008 virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS) {
2009 _strbuf.print("%s(%s, %s", Bytecodes::name(op), string(base), string(offset));
2010 if (tk != NULL) {
2011 _strbuf.print(", ");
2012 put_type_name(type, tk, &_strbuf);
2013 }
2014 _strbuf.print(")");
2015 return maybe_make_temp("fetch", type, "x");
2016 }
2017 virtual ArgToken make_invoke(methodHandle m, vmIntrinsics::ID iid,
2018 Bytecodes::Code op, bool tailcall,
2019 int argc, ArgToken* argv, TRAPS) {
2020 Symbol* name;
2021 Symbol* sig;
2022 if (m.not_null()) {
2023 name = m->name();
2024 sig = m->signature();
2025 } else {
2026 name = vmSymbols::symbol_at(vmIntrinsics::name_for(iid));
2027 sig = vmSymbols::symbol_at(vmIntrinsics::signature_for(iid));
2028 }
2029 _strbuf.print("%s %s%s(", Bytecodes::name(op), name->as_C_string(), sig->as_C_string());
2030 for (int i = 0; i < argc; i++) {
2031 _strbuf.print("%s%s", (i > 0 ? ", " : ""), string(argv[i]));
2032 }
2033 _strbuf.print(")");
2034 if (!tailcall) {
2035 BasicType rt = char2type(sig->byte_at(sig->utf8_length()-1));
2036 if (rt == T_ILLEGAL) rt = T_OBJECT; // ';' at the end of '(...)L...;'
2037 return maybe_make_temp("invoke", rt, "x");
2038 } else {
2039 const char* ret = strbuf();
2040 _out->print(_verbose ? "\n return " : " ");
2041 _out->print("%s", ret);
2042 _out->print(_verbose ? "\n}\n" : " }");
2043 }
2044 return ArgToken();
2045 }
2047 virtual void set_method_handle(oop mh) {
2048 if (WizardMode && Verbose) {
2049 tty->print("\n--- next target: ");
2050 mh->print();
2051 }
2052 }
2054 static void print(Handle root, bool verbose, outputStream* out, TRAPS) {
2055 ResourceMark rm;
2056 MethodHandlePrinter printer(root, verbose, out, CHECK);
2057 printer.walk(CHECK);
2058 out->print("\n");
2059 }
2060 static void print(Handle root, bool verbose = Verbose, outputStream* out = tty) {
2061 Thread* THREAD = Thread::current();
2062 ResourceMark rm;
2063 MethodHandlePrinter printer(root, verbose, out, THREAD);
2064 if (!HAS_PENDING_EXCEPTION)
2065 printer.walk(THREAD);
2066 if (HAS_PENDING_EXCEPTION) {
2067 oop ex = PENDING_EXCEPTION;
2068 CLEAR_PENDING_EXCEPTION;
2069 out->print(" *** ");
2070 if (printer.lose_message() != NULL) out->print("%s ", printer.lose_message());
2071 out->print("}");
2072 }
2073 out->print("\n");
2074 }
2075 };
2077 extern "C"
2078 void print_method_handle(oop mh) {
2079 if (!mh->is_oop()) {
2080 tty->print_cr("*** not a method handle: "PTR_FORMAT, (intptr_t)mh);
2081 } else if (java_lang_invoke_MethodHandle::is_instance(mh)) {
2082 MethodHandlePrinter::print(mh);
2083 } else {
2084 tty->print("*** not a method handle: ");
2085 mh->print();
2086 }
2087 }
2089 #endif // PRODUCT
