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
182 void MethodHandleChain::print(Handle mh) {
183 EXCEPTION_MARK;
184 MethodHandleChain mhc(mh, THREAD);
185 if (HAS_PENDING_EXCEPTION) {
186 oop ex = THREAD->pending_exception();
187 CLEAR_PENDING_EXCEPTION;
188 ex->print();
189 return;
190 }
191 mhc.print();
192 }
193
194
195 void MethodHandleChain::print() {
196 EXCEPTION_MARK;
197 print_impl(THREAD);
198 if (HAS_PENDING_EXCEPTION) {
199 oop ex = THREAD->pending_exception();
200 CLEAR_PENDING_EXCEPTION;
201 ex->print();
202 }
203 }
204
205 void MethodHandleChain::print_impl(TRAPS) {
206 ResourceMark rm;
207
208 MethodHandleChain chain(_root, CHECK);
209 for (;;) {
210 tty->print(INTPTR_FORMAT ": ", chain.method_handle()());
211 if (chain.is_bound()) {
212 tty->print("bound: arg_type %s arg_slot %d",
213 type2name(chain.bound_arg_type()),
214 chain.bound_arg_slot());
215 oop o = chain.bound_arg_oop();
216 if (o != NULL) {
217 if (o->is_instance()) {
218 tty->print(" instance %s", o->klass()->klass_part()->internal_name());
219 } else {
220 o->print();
221 }
222 }
223 } else if (chain.is_adapter()) {
224 tty->print("adapter: arg_slot %d conversion op %s",
225 chain.adapter_arg_slot(),
226 adapter_op_to_string(chain.adapter_conversion_op()));
227 switch (chain.adapter_conversion_op()) {
228 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY:
229 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW:
230 case java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST:
231 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM:
232 case java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM:
233 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF:
234 break;
235
236 case java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS:
237 case java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS: {
238 int dest_arg_slot = chain.adapter_conversion_vminfo();
239 tty->print(" dest_arg_slot %d type %s", dest_arg_slot, type2name(chain.adapter_conversion_src_type()));
240 break;
241 }
242
243 case java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS:
244 case java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS: {
245 int dup_slots = chain.adapter_conversion_stack_pushes();
246 tty->print(" pushes %d", dup_slots);
247 break;
248 }
249
250 case java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS:
251 case java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS: {
252 int coll_slots = chain.MethodHandle_vmslots();
253 tty->print(" coll_slots %d", coll_slots);
254 break;
255 }
256
257 case java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS: {
258 // Check the required length.
259 int spread_slots = 1 + chain.adapter_conversion_stack_pushes();
260 tty->print(" spread_slots %d", spread_slots);
261 break;
262 }
263
264 default:
265 tty->print_cr("bad adapter conversion");
266 break;
267 }
268 } else {
269 // DMH
270 tty->print("direct: ");
271 chain.last_method_oop()->print_short_name(tty);
272 }
273
274 tty->print(" (");
275 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(chain.method_type_oop());
276 for (int i = ptypes->length() - 1; i >= 0; i--) {
277 BasicType t = java_lang_Class::as_BasicType(ptypes->obj_at(i));
278 if (t == T_ARRAY) t = T_OBJECT;
279 tty->print("%c", type2char(t));
280 if (t == T_LONG || t == T_DOUBLE) tty->print("_");
281 }
282 tty->print(")");
283 BasicType rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(chain.method_type_oop()));
284 if (rtype == T_ARRAY) rtype = T_OBJECT;
285 tty->print("%c", type2char(rtype));
286 tty->cr();
287 if (!chain.is_last()) {
288 chain.next(CHECK);
289 } else {
290 break;
291 }
292 }
293 }
294 #endif
295
296
297 // -----------------------------------------------------------------------------
298 // MethodHandleWalker
299
300 Bytecodes::Code MethodHandleWalker::conversion_code(BasicType src, BasicType dest) {
301 if (is_subword_type(src)) {
302 src = T_INT; // all subword src types act like int
303 }
304 if (src == dest) {
305 return Bytecodes::_nop;
306 }
307
308 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d))
309 switch (SRC_DEST(src, dest)) {
310 case SRC_DEST(T_INT, T_LONG): return Bytecodes::_i2l;
311 case SRC_DEST(T_INT, T_FLOAT): return Bytecodes::_i2f;
312 case SRC_DEST(T_INT, T_DOUBLE): return Bytecodes::_i2d;
313 case SRC_DEST(T_INT, T_BYTE): return Bytecodes::_i2b;
314 case SRC_DEST(T_INT, T_CHAR): return Bytecodes::_i2c;
315 case SRC_DEST(T_INT, T_SHORT): return Bytecodes::_i2s;
316
317 case SRC_DEST(T_LONG, T_INT): return Bytecodes::_l2i;
318 case SRC_DEST(T_LONG, T_FLOAT): return Bytecodes::_l2f;
319 case SRC_DEST(T_LONG, T_DOUBLE): return Bytecodes::_l2d;
320
321 case SRC_DEST(T_FLOAT, T_INT): return Bytecodes::_f2i;
322 case SRC_DEST(T_FLOAT, T_LONG): return Bytecodes::_f2l;
323 case SRC_DEST(T_FLOAT, T_DOUBLE): return Bytecodes::_f2d;
324
325 case SRC_DEST(T_DOUBLE, T_INT): return Bytecodes::_d2i;
326 case SRC_DEST(T_DOUBLE, T_LONG): return Bytecodes::_d2l;
327 case SRC_DEST(T_DOUBLE, T_FLOAT): return Bytecodes::_d2f;
328 }
329 #undef SRC_DEST
330
331 // cannot do it in one step, or at all
332 return Bytecodes::_illegal;
333 }
334
335
336 // -----------------------------------------------------------------------------
337 // MethodHandleWalker::walk
338 //
339 MethodHandleWalker::ArgToken
340 MethodHandleWalker::walk(TRAPS) {
341 ArgToken empty = ArgToken(); // Empty return value.
342
343 walk_incoming_state(CHECK_(empty));
344
345 for (;;) {
346 set_method_handle(chain().method_handle_oop());
347
348 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
349
350 if (chain().is_adapter()) {
351 int conv_op = chain().adapter_conversion_op();
352 int arg_slot = chain().adapter_arg_slot();
353
354 // Check that the arg_slot is valid. In most cases it must be
355 // within range of the current arguments but there are some
356 // exceptions. Those are sanity checked in their implemention
357 // below.
358 if ((arg_slot < 0 || arg_slot >= _outgoing.length()) &&
359 conv_op > java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW &&
360 conv_op != java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS &&
361 conv_op != java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS) {
362 lose(err_msg("bad argument index %d", arg_slot), CHECK_(empty));
363 }
364
365 bool retain_original_args = false; // used by fold/collect logic
366
367 // perform the adapter action
368 switch (conv_op) {
369 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY:
370 // No changes to arguments; pass the bits through.
371 break;
372
373 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW: {
374 // To keep the verifier happy, emit bitwise ("raw") conversions as needed.
375 // See MethodHandles::same_basic_type_for_arguments for allowed conversions.
376 Handle incoming_mtype(THREAD, chain().method_type_oop());
377 Handle outgoing_mtype;
378 {
379 oop outgoing_mh_oop = chain().vmtarget_oop();
380 if (!java_lang_invoke_MethodHandle::is_instance(outgoing_mh_oop))
381 lose("outgoing target not a MethodHandle", CHECK_(empty));
382 outgoing_mtype = Handle(THREAD, java_lang_invoke_MethodHandle::type(outgoing_mh_oop));
383 }
384
385 int nptypes = java_lang_invoke_MethodType::ptype_count(outgoing_mtype());
386 if (nptypes != java_lang_invoke_MethodType::ptype_count(incoming_mtype()))
387 lose("incoming and outgoing parameter count do not agree", CHECK_(empty));
388
389 // Argument types.
390 for (int i = 0, slot = _outgoing.length() - 1; slot >= 0; slot--) {
391 if (arg_type(slot) == T_VOID) continue;
392
393 klassOop src_klass = NULL;
394 klassOop dst_klass = NULL;
395 BasicType src = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(incoming_mtype(), i), &src_klass);
396 BasicType dst = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(outgoing_mtype(), i), &dst_klass);
397 retype_raw_argument_type(src, dst, slot, CHECK_(empty));
398 i++; // We need to skip void slots at the top of the loop.
399 }
400
401 // Return type.
402 {
403 BasicType src = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(incoming_mtype()));
404 BasicType dst = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(outgoing_mtype()));
405 retype_raw_return_type(src, dst, CHECK_(empty));
406 }
407 break;
408 }
409
410 case java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST: {
411 // checkcast the Nth outgoing argument in place
412 klassOop dest_klass = NULL;
413 BasicType dest = java_lang_Class::as_BasicType(chain().adapter_arg_oop(), &dest_klass);
414 assert(dest == T_OBJECT, "");
415 ArgToken arg = _outgoing.at(arg_slot);
416 assert(dest == arg.basic_type(), "");
417 ArgToken new_arg = make_conversion(T_OBJECT, dest_klass, Bytecodes::_checkcast, arg, CHECK_(empty));
418 assert(!arg.has_index() || arg.index() == new_arg.index(), "should be the same index");
419 debug_only(dest_klass = (klassOop)badOop);
420 break;
421 }
422
423 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM: {
424 // i2l, etc., on the Nth outgoing argument in place
425 BasicType src = chain().adapter_conversion_src_type(),
426 dest = chain().adapter_conversion_dest_type();
427 ArgToken arg = _outgoing.at(arg_slot);
428 Bytecodes::Code bc = conversion_code(src, dest);
429 if (bc == Bytecodes::_nop) {
430 break;
431 } else if (bc != Bytecodes::_illegal) {
432 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty));
433 } else if (is_subword_type(dest)) {
434 bc = conversion_code(src, T_INT);
435 if (bc != Bytecodes::_illegal) {
436 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty));
437 bc = conversion_code(T_INT, dest);
438 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty));
439 }
440 }
441 if (bc == Bytecodes::_illegal) {
442 lose(err_msg("bad primitive conversion for %s -> %s", type2name(src), type2name(dest)), CHECK_(empty));
443 }
444 change_argument(src, arg_slot, dest, arg);
445 break;
446 }
447
448 case java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM: {
449 // checkcast to wrapper type & call intValue, etc.
450 BasicType dest = chain().adapter_conversion_dest_type();
451 ArgToken arg = _outgoing.at(arg_slot);
452 arg = make_conversion(T_OBJECT, SystemDictionary::box_klass(dest),
453 Bytecodes::_checkcast, arg, CHECK_(empty));
454 vmIntrinsics::ID unboxer = vmIntrinsics::for_unboxing(dest);
455 if (unboxer == vmIntrinsics::_none) {
456 lose("no unboxing method", CHECK_(empty));
457 }
458 ArgToken arglist[2];
459 arglist[0] = arg; // outgoing 'this'
460 arglist[1] = ArgToken(); // sentinel
461 arg = make_invoke(NULL, unboxer, Bytecodes::_invokevirtual, false, 1, &arglist[0], CHECK_(empty));
462 change_argument(T_OBJECT, arg_slot, dest, arg);
463 break;
464 }
465
466 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF: {
467 // call wrapper type.valueOf
468 BasicType src = chain().adapter_conversion_src_type();
469 vmIntrinsics::ID boxer = vmIntrinsics::for_boxing(src);
470 if (boxer == vmIntrinsics::_none) {
471 lose("no boxing method", CHECK_(empty));
472 }
473 ArgToken arg = _outgoing.at(arg_slot);
474 ArgToken arglist[2];
475 arglist[0] = arg; // outgoing value
476 arglist[1] = ArgToken(); // sentinel
477 arg = make_invoke(NULL, boxer, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK_(empty));
478 change_argument(src, arg_slot, T_OBJECT, arg);
479 break;
480 }
481
482 case java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS: {
483 int dest_arg_slot = chain().adapter_conversion_vminfo();
484 if (!has_argument(dest_arg_slot)) {
485 lose("bad swap index", CHECK_(empty));
486 }
487 // a simple swap between two arguments
488 if (arg_slot > dest_arg_slot) {
489 int tmp = arg_slot;
490 arg_slot = dest_arg_slot;
491 dest_arg_slot = tmp;
492 }
493 ArgToken a1 = _outgoing.at(arg_slot);
494 ArgToken a2 = _outgoing.at(dest_arg_slot);
495 change_argument(a2.basic_type(), dest_arg_slot, a1);
496 change_argument(a1.basic_type(), arg_slot, a2);
497 break;
498 }
499
500 case java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS: {
501 int dest_arg_slot = chain().adapter_conversion_vminfo();
502 if (!has_argument(dest_arg_slot) || arg_slot == dest_arg_slot) {
503 lose("bad rotate index", CHECK_(empty));
504 }
505 // Rotate the source argument (plus following N slots) into the
506 // position occupied by the dest argument (plus following N slots).
507 int rotate_count = type2size[chain().adapter_conversion_src_type()];
508 // (no other rotate counts are currently supported)
509 if (arg_slot < dest_arg_slot) {
510 for (int i = 0; i < rotate_count; i++) {
511 ArgToken temp = _outgoing.at(arg_slot);
512 _outgoing.remove_at(arg_slot);
513 _outgoing.insert_before(dest_arg_slot + rotate_count - 1, temp);
514 }
515 } else { // arg_slot > dest_arg_slot
516 for (int i = 0; i < rotate_count; i++) {
517 ArgToken temp = _outgoing.at(arg_slot + rotate_count - 1);
518 _outgoing.remove_at(arg_slot + rotate_count - 1);
519 _outgoing.insert_before(dest_arg_slot, temp);
520 }
521 }
522 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
523 break;
524 }
525
526 case java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS: {
527 int dup_slots = chain().adapter_conversion_stack_pushes();
528 if (dup_slots <= 0) {
529 lose("bad dup count", CHECK_(empty));
530 }
531 for (int i = 0; i < dup_slots; i++) {
532 ArgToken dup = _outgoing.at(arg_slot + 2*i);
533 if (dup.basic_type() != T_VOID) _outgoing_argc += 1;
534 _outgoing.insert_before(i, dup);
535 }
536 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
537 break;
538 }
539
540 case java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS: {
541 int drop_slots = -chain().adapter_conversion_stack_pushes();
542 if (drop_slots <= 0) {
543 lose("bad drop count", CHECK_(empty));
544 }
545 for (int i = 0; i < drop_slots; i++) {
546 ArgToken drop = _outgoing.at(arg_slot);
547 if (drop.basic_type() != T_VOID) _outgoing_argc -= 1;
548 _outgoing.remove_at(arg_slot);
549 }
550 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
551 break;
552 }
553
554 case java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS:
555 retain_original_args = true; // and fall through:
556 case java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS: {
557 // call argument MH recursively
558 //{static int x; if (!x++) print_method_handle(chain().method_handle_oop()); --x;}
559 Handle recursive_mh(THREAD, chain().adapter_arg_oop());
560 if (!java_lang_invoke_MethodHandle::is_instance(recursive_mh())) {
561 lose("recursive target not a MethodHandle", CHECK_(empty));
562 }
563 Handle recursive_mtype(THREAD, java_lang_invoke_MethodHandle::type(recursive_mh()));
564 int argc = java_lang_invoke_MethodType::ptype_count(recursive_mtype());
565 int coll_slots = java_lang_invoke_MethodHandle::vmslots(recursive_mh());
566 BasicType rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(recursive_mtype()));
567 ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, 1 + argc + 1); // 1+: mh, +1: sentinel
568 arglist[0] = make_oop_constant(recursive_mh(), CHECK_(empty));
569 if (arg_slot < 0 || coll_slots < 0 || arg_slot + coll_slots > _outgoing.length()) {
570 lose("bad fold/collect arg slot", CHECK_(empty));
571 }
572 for (int i = 0, slot = arg_slot + coll_slots - 1; slot >= arg_slot; slot--) {
573 ArgToken arg_state = _outgoing.at(slot);
574 BasicType arg_type = arg_state.basic_type();
575 if (arg_type == T_VOID) continue;
576 ArgToken arg = _outgoing.at(slot);
577 if (i >= argc) { lose("bad fold/collect arg", CHECK_(empty)); }
578 arglist[1+i] = arg;
579 if (!retain_original_args)
580 change_argument(arg_type, slot, T_VOID, ArgToken(tt_void));
581 i++;
582 }
583 arglist[1+argc] = ArgToken(); // sentinel
584 oop invoker = java_lang_invoke_MethodTypeForm::vmlayout(
585 java_lang_invoke_MethodType::form(recursive_mtype()) );
586 if (invoker == NULL || !invoker->is_method()) {
587 lose("bad vmlayout slot", CHECK_(empty));
588 }
589 // FIXME: consider inlining the invokee at the bytecode level
590 ArgToken ret = make_invoke(methodOop(invoker), vmIntrinsics::_none,
591 Bytecodes::_invokevirtual, false, 1+argc, &arglist[0], CHECK_(empty));
592 DEBUG_ONLY(invoker = NULL);
593 if (rtype == T_OBJECT) {
594 klassOop rklass = java_lang_Class::as_klassOop( java_lang_invoke_MethodType::rtype(recursive_mtype()) );
595 if (rklass != SystemDictionary::Object_klass() &&
596 !Klass::cast(rklass)->is_interface()) {
597 // preserve type safety
598 ret = make_conversion(T_OBJECT, rklass, Bytecodes::_checkcast, ret, CHECK_(empty));
599 }
600 }
601 if (rtype != T_VOID) {
602 int ret_slot = arg_slot + (retain_original_args ? coll_slots : 0);
603 change_argument(T_VOID, ret_slot, rtype, ret);
604 }
605 break;
606 }
607
608 case java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS: {
609 klassOop array_klass_oop = NULL;
610 BasicType array_type = java_lang_Class::as_BasicType(chain().adapter_arg_oop(),
611 &array_klass_oop);
612 assert(array_type == T_OBJECT, "");
613 assert(Klass::cast(array_klass_oop)->oop_is_array(), "");
614 arrayKlassHandle array_klass(THREAD, array_klass_oop);
615 debug_only(array_klass_oop = (klassOop)badOop);
616
617 klassOop element_klass_oop = NULL;
618 BasicType element_type = java_lang_Class::as_BasicType(array_klass->component_mirror(),
619 &element_klass_oop);
620 KlassHandle element_klass(THREAD, element_klass_oop);
621 debug_only(element_klass_oop = (klassOop)badOop);
622
623 // Fetch the argument, which we will cast to the required array type.
624 ArgToken arg = _outgoing.at(arg_slot);
625 assert(arg.basic_type() == T_OBJECT, "");
626 ArgToken array_arg = arg;
627 array_arg = make_conversion(T_OBJECT, array_klass(), Bytecodes::_checkcast, array_arg, CHECK_(empty));
628 change_argument(T_OBJECT, arg_slot, T_VOID, ArgToken(tt_void));
629
630 // Check the required length.
631 int spread_slots = 1 + chain().adapter_conversion_stack_pushes();
632 int spread_length = spread_slots;
633 if (type2size[element_type] == 2) {
634 if (spread_slots % 2 != 0) spread_slots = -1; // force error
635 spread_length = spread_slots / 2;
636 }
637 if (spread_slots < 0) {
638 lose("bad spread length", CHECK_(empty));
639 }
640
641 jvalue length_jvalue; length_jvalue.i = spread_length;
642 ArgToken length_arg = make_prim_constant(T_INT, &length_jvalue, CHECK_(empty));
643 // Call a built-in method known to the JVM to validate the length.
644 ArgToken arglist[3];
645 arglist[0] = array_arg; // value to check
646 arglist[1] = length_arg; // length to check
647 arglist[2] = ArgToken(); // sentinel
648 make_invoke(NULL, vmIntrinsics::_checkSpreadArgument,
649 Bytecodes::_invokestatic, false, 2, &arglist[0], CHECK_(empty));
650
651 // Spread out the array elements.
652 Bytecodes::Code aload_op = Bytecodes::_nop;
653 switch (element_type) {
654 case T_INT: aload_op = Bytecodes::_iaload; break;
655 case T_LONG: aload_op = Bytecodes::_laload; break;
656 case T_FLOAT: aload_op = Bytecodes::_faload; break;
657 case T_DOUBLE: aload_op = Bytecodes::_daload; break;
658 case T_OBJECT: aload_op = Bytecodes::_aaload; break;
659 case T_BOOLEAN: // fall through:
660 case T_BYTE: aload_op = Bytecodes::_baload; break;
661 case T_CHAR: aload_op = Bytecodes::_caload; break;
662 case T_SHORT: aload_op = Bytecodes::_saload; break;
663 default: lose("primitive array NYI", CHECK_(empty));
664 }
665 int ap = arg_slot;
666 for (int i = 0; i < spread_length; i++) {
667 jvalue offset_jvalue; offset_jvalue.i = i;
668 ArgToken offset_arg = make_prim_constant(T_INT, &offset_jvalue, CHECK_(empty));
669 ArgToken element_arg = make_fetch(element_type, element_klass(), aload_op, array_arg, offset_arg, CHECK_(empty));
670 change_argument(T_VOID, ap, element_type, element_arg);
671 ap += type2size[element_type];
672 }
673 break;
674 }
675
676 default:
677 lose("bad adapter conversion", CHECK_(empty));
678 break;
679 }
680 }
681
682 if (chain().is_bound()) {
683 // push a new argument
684 BasicType arg_type = chain().bound_arg_type();
685 jint arg_slot = chain().bound_arg_slot();
686 oop arg_oop = chain().bound_arg_oop();
687 ArgToken arg;
688 if (arg_type == T_OBJECT) {
689 arg = make_oop_constant(arg_oop, CHECK_(empty));
690 } else {
691 jvalue arg_value;
692 BasicType bt = java_lang_boxing_object::get_value(arg_oop, &arg_value);
693 if (bt == arg_type || (bt == T_INT && is_subword_type(arg_type))) {
694 arg = make_prim_constant(arg_type, &arg_value, CHECK_(empty));
695 } else {
696 lose(err_msg("bad bound value: arg_type %s boxing %s", type2name(arg_type), type2name(bt)), CHECK_(empty));
697 }
698 }
699 DEBUG_ONLY(arg_oop = badOop);
700 change_argument(T_VOID, arg_slot, arg_type, arg);
701 }
702
703 // this test must come after the body of the loop
704 if (!chain().is_last()) {
705 chain().next(CHECK_(empty));
706 } else {
707 break;
708 }
709 }
710
711 // finish the sequence with a tail-call to the ultimate target
712 // parameters are passed in logical order (recv 1st), not slot order
713 ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, _outgoing.length() + 1);
714 int ap = 0;
715 for (int i = _outgoing.length() - 1; i >= 0; i--) {
716 ArgToken arg_state = _outgoing.at(i);
717 if (arg_state.basic_type() == T_VOID) continue;
718 arglist[ap++] = _outgoing.at(i);
719 }
720 assert(ap == _outgoing_argc, "");
721 arglist[ap] = ArgToken(); // add a sentinel, for the sake of asserts
722 return make_invoke(chain().last_method_oop(),
723 vmIntrinsics::_none,
724 chain().last_invoke_code(), true,
725 ap, arglist, THREAD);
726 }
727
728
729 // -----------------------------------------------------------------------------
730 // MethodHandleWalker::walk_incoming_state
731 //
732 void MethodHandleWalker::walk_incoming_state(TRAPS) {
733 Handle mtype(THREAD, chain().method_type_oop());
734 int nptypes = java_lang_invoke_MethodType::ptype_count(mtype());
735 _outgoing_argc = nptypes;
736 int argp = nptypes - 1;
737 if (argp >= 0) {
738 _outgoing.at_grow(argp, ArgToken(tt_void)); // presize
739 }
740 for (int i = 0; i < nptypes; i++) {
741 klassOop arg_type_klass = NULL;
742 BasicType arg_type = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(mtype(), i), &arg_type_klass);
743 int index = new_local_index(arg_type);
744 ArgToken arg = make_parameter(arg_type, arg_type_klass, index, CHECK);
745 DEBUG_ONLY(arg_type_klass = (klassOop) NULL);
746 _outgoing.at_put(argp, arg);
747 if (type2size[arg_type] == 2) {
748 // add the extra slot, so we can model the JVM stack
749 _outgoing.insert_before(argp+1, ArgToken(tt_void));
750 }
751 --argp;
752 }
753 // call make_parameter at the end of the list for the return type
754 klassOop ret_type_klass = NULL;
755 BasicType ret_type = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(mtype()), &ret_type_klass);
756 ArgToken ret = make_parameter(ret_type, ret_type_klass, -1, CHECK);
757 // ignore ret; client can catch it if needed
758
759 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
760
761 verify_args_and_signature(CHECK);
762 }
763
764
765 #ifdef ASSERT
766 void MethodHandleWalker::verify_args_and_signature(TRAPS) {
767 int index = _outgoing.length() - 1;
768 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(chain().method_type_oop());
769 for (int i = 0, limit = ptypes->length(); i < limit; i++) {
770 BasicType t = java_lang_Class::as_BasicType(ptypes->obj_at(i));
771 if (t == T_ARRAY) t = T_OBJECT;
772 if (t == T_LONG || t == T_DOUBLE) {
773 assert(T_VOID == _outgoing.at(index).basic_type(), "types must match");
774 index--;
775 }
776 assert(t == _outgoing.at(index).basic_type(), "types must match");
777 index--;
778 }
779 }
780 #endif
781
782
783 // -----------------------------------------------------------------------------
784 // MethodHandleWalker::change_argument
785 //
786 // This is messy because some kinds of arguments are paired with
787 // companion slots containing an empty value.
788 void MethodHandleWalker::change_argument(BasicType old_type, int slot, const ArgToken& new_arg) {
789 BasicType new_type = new_arg.basic_type();
790 int old_size = type2size[old_type];
791 int new_size = type2size[new_type];
792 if (old_size == new_size) {
793 // simple case first
794 _outgoing.at_put(slot, new_arg);
795 } else if (old_size > new_size) {
796 for (int i = old_size - 1; i >= new_size; i--) {
797 assert((i != 0) == (_outgoing.at(slot + i).basic_type() == T_VOID), "");
798 _outgoing.remove_at(slot + i);
799 }
800 if (new_size > 0)
801 _outgoing.at_put(slot, new_arg);
802 else
803 _outgoing_argc -= 1; // deleted a real argument
804 } else {
805 for (int i = old_size; i < new_size; i++) {
806 _outgoing.insert_before(slot + i, ArgToken(tt_void));
807 }
808 _outgoing.at_put(slot, new_arg);
809 if (old_size == 0)
810 _outgoing_argc += 1; // inserted a real argument
811 }
812 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
813 }
814
815
816 #ifdef ASSERT
817 int MethodHandleWalker::argument_count_slow() {
818 int args_seen = 0;
819 for (int i = _outgoing.length() - 1; i >= 0; i--) {
820 if (_outgoing.at(i).basic_type() != T_VOID) {
821 ++args_seen;
822 if (_outgoing.at(i).basic_type() == T_LONG ||
823 _outgoing.at(i).basic_type() == T_DOUBLE) {
824 assert(_outgoing.at(i + 1).basic_type() == T_VOID, "should only follow two word");
825 }
826 } else {
827 assert(_outgoing.at(i - 1).basic_type() == T_LONG ||
828 _outgoing.at(i - 1).basic_type() == T_DOUBLE, "should only follow two word");
829 }
830 }
831 return args_seen;
832 }
833 #endif
834
835
836 // -----------------------------------------------------------------------------
837 // MethodHandleWalker::retype_raw_conversion
838 //
839 // Do the raw retype conversions for OP_RETYPE_RAW.
840 void MethodHandleWalker::retype_raw_conversion(BasicType src, BasicType dst, bool for_return, int slot, TRAPS) {
841 if (src != dst) {
842 if (MethodHandles::same_basic_type_for_returns(src, dst, /*raw*/ true)) {
843 if (MethodHandles::is_float_fixed_reinterpretation_cast(src, dst)) {
844 if (for_return) Untested("MHW return raw conversion"); // still untested
845 vmIntrinsics::ID iid = vmIntrinsics::for_raw_conversion(src, dst);
846 if (iid == vmIntrinsics::_none) {
847 lose("no raw conversion method", CHECK);
848 }
849 ArgToken arglist[2];
850 if (!for_return) {
851 // argument type conversion
852 ArgToken arg = _outgoing.at(slot);
853 assert(arg.token_type() >= tt_symbolic || src == arg.basic_type(), "sanity");
854 arglist[0] = arg; // outgoing 'this'
855 arglist[1] = ArgToken(); // sentinel
856 arg = make_invoke(NULL, iid, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK);
857 change_argument(src, slot, dst, arg);
858 } else {
859 // return type conversion
860 klassOop arg_klass = NULL;
861 arglist[0] = make_parameter(src, arg_klass, -1, CHECK); // return value
862 arglist[1] = ArgToken(); // sentinel
863 (void) make_invoke(NULL, iid, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK);
864 }
865 } else {
866 // Nothing to do.
867 }
868 } else if (src == T_OBJECT && is_java_primitive(dst)) {
869 // ref-to-prim: discard ref, push zero
870 lose("requested ref-to-prim conversion not expected", CHECK);
871 } else {
872 lose(err_msg("requested raw conversion not allowed: %s -> %s", type2name(src), type2name(dst)), CHECK);
873 }
874 }
875 }
876
877
878 // -----------------------------------------------------------------------------
879 // MethodHandleCompiler
880
881 MethodHandleCompiler::MethodHandleCompiler(Handle root, Symbol* name, Symbol* signature, int invoke_count, bool is_invokedynamic, TRAPS)
882 : MethodHandleWalker(root, is_invokedynamic, THREAD),
883 _invoke_count(invoke_count),
884 _thread(THREAD),
885 _bytecode(THREAD, 50),
886 _constants(THREAD, 10),
887 _cur_stack(0),
888 _max_stack(0),
889 _rtype(T_ILLEGAL)
890 {
891
892 // Element zero is always the null constant.
893 (void) _constants.append(NULL);
894
895 // Set name and signature index.
896 _name_index = cpool_symbol_put(name);
897 _signature_index = cpool_symbol_put(signature);
898
899 // Get return type klass.
900 Handle first_mtype(THREAD, chain().method_type_oop());
901 // _rklass is NULL for primitives.
902 _rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(first_mtype()), &_rklass);
903 if (_rtype == T_ARRAY) _rtype = T_OBJECT;
904
905 ArgumentSizeComputer args(signature);
906 int params = args.size() + 1; // Incoming arguments plus receiver.
907 _num_params = for_invokedynamic() ? params - 1 : params; // XXX Check if callee is static?
908 }
909
910
911 // -----------------------------------------------------------------------------
912 // MethodHandleCompiler::compile
913 //
914 // Compile this MethodHandle into a bytecode adapter and return a
915 // methodOop.
916 methodHandle MethodHandleCompiler::compile(TRAPS) {
917 assert(_thread == THREAD, "must be same thread");
918 methodHandle nullHandle;
919 (void) walk(CHECK_(nullHandle));
920 return get_method_oop(CHECK_(nullHandle));
921 }
922
923
924 void MethodHandleCompiler::emit_bc(Bytecodes::Code op, int index, int args_size) {
925 Bytecodes::check(op); // Are we legal?
926
927 switch (op) {
928 // b
929 case Bytecodes::_aconst_null:
930 case Bytecodes::_iconst_m1:
931 case Bytecodes::_iconst_0:
932 case Bytecodes::_iconst_1:
933 case Bytecodes::_iconst_2:
934 case Bytecodes::_iconst_3:
935 case Bytecodes::_iconst_4:
936 case Bytecodes::_iconst_5:
937 case Bytecodes::_lconst_0:
938 case Bytecodes::_lconst_1:
939 case Bytecodes::_fconst_0:
940 case Bytecodes::_fconst_1:
941 case Bytecodes::_fconst_2:
942 case Bytecodes::_dconst_0:
943 case Bytecodes::_dconst_1:
944 case Bytecodes::_iload_0:
945 case Bytecodes::_iload_1:
946 case Bytecodes::_iload_2:
947 case Bytecodes::_iload_3:
948 case Bytecodes::_lload_0:
949 case Bytecodes::_lload_1:
950 case Bytecodes::_lload_2:
951 case Bytecodes::_lload_3:
952 case Bytecodes::_fload_0:
953 case Bytecodes::_fload_1:
954 case Bytecodes::_fload_2:
955 case Bytecodes::_fload_3:
956 case Bytecodes::_dload_0:
957 case Bytecodes::_dload_1:
958 case Bytecodes::_dload_2:
959 case Bytecodes::_dload_3:
960 case Bytecodes::_aload_0:
961 case Bytecodes::_aload_1:
962 case Bytecodes::_aload_2:
963 case Bytecodes::_aload_3:
964 case Bytecodes::_istore_0:
965 case Bytecodes::_istore_1:
966 case Bytecodes::_istore_2:
967 case Bytecodes::_istore_3:
968 case Bytecodes::_lstore_0:
969 case Bytecodes::_lstore_1:
970 case Bytecodes::_lstore_2:
971 case Bytecodes::_lstore_3:
972 case Bytecodes::_fstore_0:
973 case Bytecodes::_fstore_1:
974 case Bytecodes::_fstore_2:
975 case Bytecodes::_fstore_3:
976 case Bytecodes::_dstore_0:
977 case Bytecodes::_dstore_1:
978 case Bytecodes::_dstore_2:
979 case Bytecodes::_dstore_3:
980 case Bytecodes::_astore_0:
981 case Bytecodes::_astore_1:
982 case Bytecodes::_astore_2:
983 case Bytecodes::_astore_3:
984 case Bytecodes::_iand:
985 case Bytecodes::_i2l:
986 case Bytecodes::_i2f:
987 case Bytecodes::_i2d:
988 case Bytecodes::_i2b:
989 case Bytecodes::_i2c:
990 case Bytecodes::_i2s:
991 case Bytecodes::_l2i:
992 case Bytecodes::_l2f:
993 case Bytecodes::_l2d:
994 case Bytecodes::_f2i:
995 case Bytecodes::_f2l:
996 case Bytecodes::_f2d:
997 case Bytecodes::_d2i:
998 case Bytecodes::_d2l:
999 case Bytecodes::_d2f:
1000 case Bytecodes::_iaload:
1001 case Bytecodes::_laload:
1002 case Bytecodes::_faload:
1003 case Bytecodes::_daload:
1004 case Bytecodes::_aaload:
1005 case Bytecodes::_baload:
1006 case Bytecodes::_caload:
1007 case Bytecodes::_saload:
1008 case Bytecodes::_ireturn:
1009 case Bytecodes::_lreturn:
1010 case Bytecodes::_freturn:
1011 case Bytecodes::_dreturn:
1012 case Bytecodes::_areturn:
1013 case Bytecodes::_return:
1014 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_b, "wrong bytecode format");
1015 _bytecode.push(op);
1016 break;
1017
1018 // bi
1019 case Bytecodes::_ldc:
1020 assert(Bytecodes::format_bits(op, false) == (Bytecodes::_fmt_b|Bytecodes::_fmt_has_k), "wrong bytecode format");
1021 if (index == (index & 0xff)) {
1022 _bytecode.push(op);
1023 _bytecode.push(index);
1024 } else {
1025 _bytecode.push(Bytecodes::_ldc_w);
1026 _bytecode.push(index >> 8);
1027 _bytecode.push(index);
1028 }
1029 break;
1030
1031 case Bytecodes::_iload:
1032 case Bytecodes::_lload:
1033 case Bytecodes::_fload:
1034 case Bytecodes::_dload:
1035 case Bytecodes::_aload:
1036 case Bytecodes::_istore:
1037 case Bytecodes::_lstore:
1038 case Bytecodes::_fstore:
1039 case Bytecodes::_dstore:
1040 case Bytecodes::_astore:
1041 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bi, "wrong bytecode format");
1042 if (index == (index & 0xff)) {
1043 _bytecode.push(op);
1044 _bytecode.push(index);
1045 } else {
1046 // doesn't fit in a u2
1047 _bytecode.push(Bytecodes::_wide);
1048 _bytecode.push(op);
1049 _bytecode.push(index >> 8);
1050 _bytecode.push(index);
1051 }
1052 break;
1053
1054 // bkk
1055 case Bytecodes::_ldc_w:
1056 case Bytecodes::_ldc2_w:
1057 case Bytecodes::_checkcast:
1058 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bkk, "wrong bytecode format");
1059 assert((unsigned short) index == index, "index does not fit in 16-bit");
1060 _bytecode.push(op);
1061 _bytecode.push(index >> 8);
1062 _bytecode.push(index);
1063 break;
1064
1065 // bJJ
1066 case Bytecodes::_invokestatic:
1067 case Bytecodes::_invokespecial:
1068 case Bytecodes::_invokevirtual:
1069 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bJJ, "wrong bytecode format");
1070 assert((unsigned short) index == index, "index does not fit in 16-bit");
1071 _bytecode.push(op);
1072 _bytecode.push(index >> 8);
1073 _bytecode.push(index);
1074 break;
1075
1076 case Bytecodes::_invokeinterface:
1077 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bJJ, "wrong bytecode format");
1078 assert((unsigned short) index == index, "index does not fit in 16-bit");
1079 assert(args_size > 0, "valid args_size");
1080 _bytecode.push(op);
1081 _bytecode.push(index >> 8);
1082 _bytecode.push(index);
1083 _bytecode.push(args_size);
1084 _bytecode.push(0);
1085 break;
1086
1087 default:
1088 ShouldNotReachHere();
1089 }
1090 }
1091
1092
1093 void MethodHandleCompiler::emit_load(BasicType bt, int index) {
1094 if (index <= 3) {
1095 switch (bt) {
1096 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1097 case T_INT: emit_bc(Bytecodes::cast(Bytecodes::_iload_0 + index)); break;
1098 case T_LONG: emit_bc(Bytecodes::cast(Bytecodes::_lload_0 + index)); break;
1099 case T_FLOAT: emit_bc(Bytecodes::cast(Bytecodes::_fload_0 + index)); break;
1100 case T_DOUBLE: emit_bc(Bytecodes::cast(Bytecodes::_dload_0 + index)); break;
1101 case T_OBJECT: emit_bc(Bytecodes::cast(Bytecodes::_aload_0 + index)); break;
1102 default:
1103 ShouldNotReachHere();
1104 }
1105 }
1106 else {
1107 switch (bt) {
1108 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1109 case T_INT: emit_bc(Bytecodes::_iload, index); break;
1110 case T_LONG: emit_bc(Bytecodes::_lload, index); break;
1111 case T_FLOAT: emit_bc(Bytecodes::_fload, index); break;
1112 case T_DOUBLE: emit_bc(Bytecodes::_dload, index); break;
1113 case T_OBJECT: emit_bc(Bytecodes::_aload, index); break;
1114 default:
1115 ShouldNotReachHere();
1116 }
1117 }
1118 stack_push(bt);
1119 }
1120
1121 void MethodHandleCompiler::emit_store(BasicType bt, int index) {
1122 if (index <= 3) {
1123 switch (bt) {
1124 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1125 case T_INT: emit_bc(Bytecodes::cast(Bytecodes::_istore_0 + index)); break;
1126 case T_LONG: emit_bc(Bytecodes::cast(Bytecodes::_lstore_0 + index)); break;
1127 case T_FLOAT: emit_bc(Bytecodes::cast(Bytecodes::_fstore_0 + index)); break;
1128 case T_DOUBLE: emit_bc(Bytecodes::cast(Bytecodes::_dstore_0 + index)); break;
1129 case T_OBJECT: emit_bc(Bytecodes::cast(Bytecodes::_astore_0 + index)); break;
1130 default:
1131 ShouldNotReachHere();
1132 }
1133 }
1134 else {
1135 switch (bt) {
1136 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1137 case T_INT: emit_bc(Bytecodes::_istore, index); break;
1138 case T_LONG: emit_bc(Bytecodes::_lstore, index); break;
1139 case T_FLOAT: emit_bc(Bytecodes::_fstore, index); break;
1140 case T_DOUBLE: emit_bc(Bytecodes::_dstore, index); break;
1141 case T_OBJECT: emit_bc(Bytecodes::_astore, index); break;
1142 default:
1143 ShouldNotReachHere();
1144 }
1145 }
1146 stack_pop(bt);
1147 }
1148
1149
1150 void MethodHandleCompiler::emit_load_constant(ArgToken arg) {
1151 BasicType bt = arg.basic_type();
1152 if (is_subword_type(bt)) bt = T_INT;
1153 switch (bt) {
1154 case T_INT: {
1155 jint value = arg.get_jint();
1156 if (-1 <= value && value <= 5)
1157 emit_bc(Bytecodes::cast(Bytecodes::_iconst_0 + value));
1158 else
1159 emit_bc(Bytecodes::_ldc, cpool_int_put(value));
1160 break;
1161 }
1162 case T_LONG: {
1163 jlong value = arg.get_jlong();
1164 if (0 <= value && value <= 1)
1165 emit_bc(Bytecodes::cast(Bytecodes::_lconst_0 + (int) value));
1166 else
1167 emit_bc(Bytecodes::_ldc2_w, cpool_long_put(value));
1168 break;
1169 }
1170 case T_FLOAT: {
1171 jfloat value = arg.get_jfloat();
1172 if (value == 0.0 || value == 1.0 || value == 2.0)
1173 emit_bc(Bytecodes::cast(Bytecodes::_fconst_0 + (int) value));
1174 else
1175 emit_bc(Bytecodes::_ldc, cpool_float_put(value));
1176 break;
1177 }
1178 case T_DOUBLE: {
1179 jdouble value = arg.get_jdouble();
1180 if (value == 0.0 || value == 1.0)
1181 emit_bc(Bytecodes::cast(Bytecodes::_dconst_0 + (int) value));
1182 else
1183 emit_bc(Bytecodes::_ldc2_w, cpool_double_put(value));
1184 break;
1185 }
1186 case T_OBJECT: {
1187 Handle value = arg.object();
1188 if (value.is_null())
1189 emit_bc(Bytecodes::_aconst_null);
1190 else
1191 emit_bc(Bytecodes::_ldc, cpool_object_put(value));
1192 break;
1193 }
1194 default:
1195 ShouldNotReachHere();
1196 }
1197 stack_push(bt);
1198 }
1199
1200
1201 MethodHandleWalker::ArgToken
1202 MethodHandleCompiler::make_conversion(BasicType type, klassOop tk, Bytecodes::Code op,
1203 const ArgToken& src, TRAPS) {
1204
1205 BasicType srctype = src.basic_type();
1206 TokenType tt = src.token_type();
1207 int index = -1;
1208
1209 switch (op) {
1210 case Bytecodes::_i2l:
1211 case Bytecodes::_i2f:
1212 case Bytecodes::_i2d:
1213 case Bytecodes::_i2b:
1214 case Bytecodes::_i2c:
1215 case Bytecodes::_i2s:
1216
1217 case Bytecodes::_l2i:
1218 case Bytecodes::_l2f:
1219 case Bytecodes::_l2d:
1220
1221 case Bytecodes::_f2i:
1222 case Bytecodes::_f2l:
1223 case Bytecodes::_f2d:
1224
1225 case Bytecodes::_d2i:
1226 case Bytecodes::_d2l:
1227 case Bytecodes::_d2f:
1228 if (tt == tt_constant) {
1229 emit_load_constant(src);
1230 } else {
1231 emit_load(srctype, src.index());
1232 }
1233 stack_pop(srctype); // pop the src type
1234 emit_bc(op);
1235 stack_push(type); // push the dest value
1236 if (tt != tt_constant)
1237 index = src.index();
1238 if (srctype != type || index == -1)
1239 index = new_local_index(type);
1240 emit_store(type, index);
1241 break;
1242
1243 case Bytecodes::_checkcast:
1244 if (tt == tt_constant) {
1245 emit_load_constant(src);
1246 } else {
1247 emit_load(srctype, src.index());
1248 index = src.index();
1249 }
1250 emit_bc(op, cpool_klass_put(tk));
1251 if (index == -1)
1252 index = new_local_index(type);
1253 emit_store(srctype, index);
1254 break;
1255
1256 case Bytecodes::_nop:
1257 // nothing to do
1258 return src;
1259
1260 default:
1261 if (op == Bytecodes::_illegal)
1262 lose(err_msg("no such primitive conversion: %s -> %s", type2name(src.basic_type()), type2name(type)), THREAD);
1263 else
1264 lose(err_msg("bad primitive conversion op: %s", Bytecodes::name(op)), THREAD);
1265 return make_prim_constant(type, &zero_jvalue, THREAD);
1266 }
1267
1268 return make_parameter(type, tk, index, THREAD);
1269 }
1270
1271
1272 // -----------------------------------------------------------------------------
1273 // MethodHandleCompiler
1274 //
1275
1276 // Values used by the compiler.
1277 jvalue MethodHandleCompiler::zero_jvalue = { 0 };
1278 jvalue MethodHandleCompiler::one_jvalue = { 1 };
1279
1280 // Emit bytecodes for the given invoke instruction.
1281 MethodHandleWalker::ArgToken
1282 MethodHandleCompiler::make_invoke(methodOop m, vmIntrinsics::ID iid,
1283 Bytecodes::Code op, bool tailcall,
1284 int argc, MethodHandleWalker::ArgToken* argv,
1285 TRAPS) {
1286 ArgToken zero;
1287 if (m == NULL) {
1288 // Get the intrinsic methodOop.
1289 m = vmIntrinsics::method_for(iid);
1290 if (m == NULL) {
1291 lose(vmIntrinsics::name_at(iid), CHECK_(zero));
1292 }
1293 }
1294
1295 klassOop klass = m->method_holder();
1296 Symbol* name = m->name();
1297 Symbol* signature = m->signature();
1298
1299 // Count the number of arguments, not the size
1300 ArgumentCount asc(signature);
1301 assert(argc == asc.size() + ((op == Bytecodes::_invokestatic || op == Bytecodes::_invokedynamic) ? 0 : 1),
1302 "argc mismatch");
1303
1304 if (tailcall) {
1305 // Actually, in order to make these methods more recognizable,
1306 // let's put them in holder class MethodHandle. That way stack
1307 // walkers and compiler heuristics can recognize them.
1308 _target_klass = SystemDictionary::MethodHandle_klass();
1309 }
1310
1311 // Inline the method.
1312 InvocationCounter* ic = m->invocation_counter();
1313 ic->set_carry_flag();
1314
1315 for (int i = 0; i < argc; i++) {
1316 ArgToken arg = argv[i];
1317 TokenType tt = arg.token_type();
1318 BasicType bt = arg.basic_type();
1319
1320 switch (tt) {
1321 case tt_parameter:
1322 case tt_temporary:
1323 emit_load(bt, arg.index());
1324 break;
1325 case tt_constant:
1326 emit_load_constant(arg);
1327 break;
1328 case tt_illegal:
1329 // Sentinel.
1330 assert(i == (argc - 1), "sentinel must be last entry");
1331 break;
1332 case tt_void:
1333 default:
1334 ShouldNotReachHere();
1335 }
1336 }
1337
1338 // Populate constant pool.
1339 int name_index = cpool_symbol_put(name);
1340 int signature_index = cpool_symbol_put(signature);
1341 int name_and_type_index = cpool_name_and_type_put(name_index, signature_index);
1342 int klass_index = cpool_klass_put(klass);
1343 int methodref_index = cpool_methodref_put(klass_index, name_and_type_index);
1344
1345 // Generate invoke.
1346 switch (op) {
1347 case Bytecodes::_invokestatic:
1348 case Bytecodes::_invokespecial:
1349 case Bytecodes::_invokevirtual:
1350 emit_bc(op, methodref_index);
1351 break;
1352
1353 case Bytecodes::_invokeinterface: {
1354 ArgumentSizeComputer asc(signature);
1355 emit_bc(op, methodref_index, asc.size() + 1);
1356 break;
1357 }
1358
1359 default:
1360 ShouldNotReachHere();
1361 }
1362
1363 // If tailcall, we have walked all the way to a direct method handle.
1364 // Otherwise, make a recursive call to some helper routine.
1365 BasicType rbt = m->result_type();
1366 if (rbt == T_ARRAY) rbt = T_OBJECT;
1367 stack_push(rbt); // The return value is already pushed onto the stack.
1368 ArgToken ret;
1369 if (tailcall) {
1370 if (rbt != _rtype) {
1371 if (rbt == T_VOID) {
1372 // push a zero of the right sort
1373 if (_rtype == T_OBJECT) {
1374 zero = make_oop_constant(NULL, CHECK_(zero));
1375 } else {
1376 zero = make_prim_constant(_rtype, &zero_jvalue, CHECK_(zero));
1377 }
1378 emit_load_constant(zero);
1379 } else if (_rtype == T_VOID) {
1380 // We'll emit a _return with something on the stack.
1381 // It's OK to ignore what's on the stack.
1382 } else if (rbt == T_INT && is_subword_type(_rtype)) {
1383 // Convert value to match return type.
1384 switch (_rtype) {
1385 case T_BOOLEAN: {
1386 // boolean is treated as a one-bit unsigned integer.
1387 // Cf. API documentation: java/lang/invoke/MethodHandles.html#explicitCastArguments
1388 ArgToken one = make_prim_constant(T_INT, &one_jvalue, CHECK_(zero));
1389 emit_load_constant(one);
1390 emit_bc(Bytecodes::_iand);
1391 break;
1392 }
1393 case T_BYTE: emit_bc(Bytecodes::_i2b); break;
1394 case T_CHAR: emit_bc(Bytecodes::_i2c); break;
1395 case T_SHORT: emit_bc(Bytecodes::_i2s); break;
1396 default: ShouldNotReachHere();
1397 }
1398 } else if (is_subword_type(rbt) && (is_subword_type(_rtype) || (_rtype == T_INT))) {
1399 // The subword type was returned as an int and will be passed
1400 // on as an int.
1401 } else {
1402 lose("unknown conversion", CHECK_(zero));
1403 }
1404 }
1405 switch (_rtype) {
1406 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1407 case T_INT: emit_bc(Bytecodes::_ireturn); break;
1408 case T_LONG: emit_bc(Bytecodes::_lreturn); break;
1409 case T_FLOAT: emit_bc(Bytecodes::_freturn); break;
1410 case T_DOUBLE: emit_bc(Bytecodes::_dreturn); break;
1411 case T_VOID: emit_bc(Bytecodes::_return); break;
1412 case T_OBJECT:
1413 if (_rklass.not_null() && _rklass() != SystemDictionary::Object_klass())
1414 emit_bc(Bytecodes::_checkcast, cpool_klass_put(_rklass()));
1415 emit_bc(Bytecodes::_areturn);
1416 break;
1417 default: ShouldNotReachHere();
1418 }
1419 ret = ArgToken(); // Dummy return value.
1420 }
1421 else {
1422 int index = new_local_index(rbt);
1423 switch (rbt) {
1424 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1425 case T_INT: case T_LONG: case T_FLOAT: case T_DOUBLE:
1426 case T_OBJECT:
1427 emit_store(rbt, index);
1428 ret = ArgToken(tt_temporary, rbt, index);
1429 break;
1430 case T_VOID:
1431 ret = ArgToken(tt_void);
1432 break;
1433 default:
1434 ShouldNotReachHere();
1435 }
1436 }
1437
1438 return ret;
1439 }
1440
1441 MethodHandleWalker::ArgToken
1442 MethodHandleCompiler::make_fetch(BasicType type, klassOop tk, Bytecodes::Code op,
1443 const MethodHandleWalker::ArgToken& base,
1444 const MethodHandleWalker::ArgToken& offset,
1445 TRAPS) {
1446 switch (base.token_type()) {
1447 case tt_parameter:
1448 case tt_temporary:
1449 emit_load(base.basic_type(), base.index());
1450 break;
1451 case tt_constant:
1452 emit_load_constant(base);
1453 break;
1454 default:
1455 ShouldNotReachHere();
1456 }
1457 switch (offset.token_type()) {
1458 case tt_parameter:
1459 case tt_temporary:
1460 emit_load(offset.basic_type(), offset.index());
1461 break;
1462 case tt_constant:
1463 emit_load_constant(offset);
1464 break;
1465 default:
1466 ShouldNotReachHere();
1467 }
1468 emit_bc(op);
1469 int index = new_local_index(type);
1470 emit_store(type, index);
1471 return ArgToken(tt_temporary, type, index);
1472 }
1473
1474
1475 int MethodHandleCompiler::cpool_primitive_put(BasicType bt, jvalue* con) {
1476 jvalue con_copy;
1477 assert(bt < T_OBJECT, "");
1478 if (type2aelembytes(bt) < jintSize) {
1479 // widen to int
1480 con_copy = (*con);
1481 con = &con_copy;
1482 switch (bt) {
1483 case T_BOOLEAN: con->i = (con->z ? 1 : 0); break;
1484 case T_BYTE: con->i = con->b; break;
1485 case T_CHAR: con->i = con->c; break;
1486 case T_SHORT: con->i = con->s; break;
1487 default: ShouldNotReachHere();
1488 }
1489 bt = T_INT;
1490 }
1491
1492 // for (int i = 1, imax = _constants.length(); i < imax; i++) {
1493 // ConstantValue* con = _constants.at(i);
1494 // if (con != NULL && con->is_primitive() && con.basic_type() == bt) {
1495 // bool match = false;
1496 // switch (type2size[bt]) {
1497 // case 1: if (pcon->_value.i == con->i) match = true; break;
1498 // case 2: if (pcon->_value.j == con->j) match = true; break;
1499 // }
1500 // if (match)
1501 // return i;
1502 // }
1503 // }
1504 ConstantValue* cv = new ConstantValue(bt, *con);
1505 int index = _constants.append(cv);
1506
1507 // long and double entries take 2 slots, we add another empty entry.
1508 if (type2size[bt] == 2)
1509 (void) _constants.append(NULL);
1510
1511 return index;
1512 }
1513
1514
1515 constantPoolHandle MethodHandleCompiler::get_constant_pool(TRAPS) const {
1516 constantPoolHandle nullHandle;
1517 constantPoolOop cpool_oop = oopFactory::new_constantPool(_constants.length(),
1518 oopDesc::IsSafeConc,
1519 CHECK_(nullHandle));
1520 constantPoolHandle cpool(THREAD, cpool_oop);
1521
1522 // Fill the real constant pool skipping the zero element.
1523 for (int i = 1; i < _constants.length(); i++) {
1524 ConstantValue* cv = _constants.at(i);
1525 switch (cv->tag()) {
1526 case JVM_CONSTANT_Utf8: cpool->symbol_at_put( i, cv->symbol() ); break;
1527 case JVM_CONSTANT_Integer: cpool->int_at_put( i, cv->get_jint() ); break;
1528 case JVM_CONSTANT_Float: cpool->float_at_put( i, cv->get_jfloat() ); break;
1529 case JVM_CONSTANT_Long: cpool->long_at_put( i, cv->get_jlong() ); break;
1530 case JVM_CONSTANT_Double: cpool->double_at_put( i, cv->get_jdouble() ); break;
1531 case JVM_CONSTANT_Class: cpool->klass_at_put( i, cv->klass_oop() ); break;
1532 case JVM_CONSTANT_Methodref: cpool->method_at_put( i, cv->first_index(), cv->second_index()); break;
1533 case JVM_CONSTANT_NameAndType: cpool->name_and_type_at_put(i, cv->first_index(), cv->second_index()); break;
1534 case JVM_CONSTANT_Object: cpool->object_at_put( i, cv->object_oop() ); break;
1535 default: ShouldNotReachHere();
1536 }
1537
1538 switch (cv->tag()) {
1539 case JVM_CONSTANT_Long:
1540 case JVM_CONSTANT_Double:
1541 i++; // Skip empty entry.
1542 assert(_constants.at(i) == NULL, "empty entry");
1543 break;
1544 }
1545 }
1546
1547 // Set the constant pool holder to the target method's class.
1548 cpool->set_pool_holder(_target_klass());
1549
1550 return cpool;
1551 }
1552
1553
1554 methodHandle MethodHandleCompiler::get_method_oop(TRAPS) const {
1555 methodHandle empty;
1556 // Create a method that holds the generated bytecode. invokedynamic
1557 // has no receiver, normal MH calls do.
1558 int flags_bits;
1559 if (for_invokedynamic())
1560 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC | JVM_ACC_STATIC);
1561 else
1562 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC);
1563
1564 // Create a new method
1565 methodHandle m;
1566 {
1567 methodOop m_oop = oopFactory::new_method(bytecode_length(),
1568 accessFlags_from(flags_bits),
1569 0, 0, 0, oopDesc::IsSafeConc, CHECK_(empty));
1570 m = methodHandle(THREAD, m_oop);
1571 }
1572
1573 constantPoolHandle cpool = get_constant_pool(CHECK_(empty));
1574 m->set_constants(cpool());
1575
1576 m->set_name_index(_name_index);
1577 m->set_signature_index(_signature_index);
1578
1579 m->set_code((address) bytecode());
1580
1581 m->set_max_stack(_max_stack);
1582 m->set_max_locals(max_locals());
1583 m->set_size_of_parameters(_num_params);
1584
1585 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1586 m->set_exception_table(exception_handlers());
1587
1588 // Rewrite the method and set up the constant pool cache.
1589 objArrayOop m_array = oopFactory::new_system_objArray(1, CHECK_(empty));
1590 objArrayHandle methods(THREAD, m_array);
1591 methods->obj_at_put(0, m());
1592 Rewriter::rewrite(_target_klass(), cpool, methods, CHECK_(empty)); // Use fake class.
1593
1594 // Set the invocation counter's count to the invoke count of the
1595 // original call site.
1596 InvocationCounter* ic = m->invocation_counter();
1597 ic->set(InvocationCounter::wait_for_compile, _invoke_count);
1598
1599 // Create a new MDO
1600 {
1601 methodDataOop mdo = oopFactory::new_methodData(m, CHECK_(empty));
1602 assert(m->method_data() == NULL, "there should not be an MDO yet");
1603 m->set_method_data(mdo);
1604
1605 // Iterate over all profile data and set the count of the counter
1606 // data entries to the original call site counter.
1607 for (ProfileData* profile_data = mdo->first_data();
1608 mdo->is_valid(profile_data);
1609 profile_data = mdo->next_data(profile_data)) {
1610 if (profile_data->is_CounterData()) {
1611 CounterData* counter_data = profile_data->as_CounterData();
1612 counter_data->set_count(_invoke_count);
1613 }
1614 }
1615 }
1616
1617 #ifndef PRODUCT
1618 if (TraceMethodHandles) {
1619 m->print();
1620 m->print_codes();
1621 }
1622 #endif //PRODUCT
1623
1624 assert(m->is_method_handle_adapter(), "must be recognized as an adapter");
1625 return m;
1626 }
1627
1628
1629 #ifndef PRODUCT
1630
1631 // MH printer for debugging.
1632
1633 class MethodHandlePrinter : public MethodHandleWalker {
1634 private:
1635 outputStream* _out;
1636 bool _verbose;
1637 int _temp_num;
1638 int _param_state;
1639 stringStream _strbuf;
1640 const char* strbuf() {
1641 const char* s = _strbuf.as_string();
1642 _strbuf.reset();
1643 return s;
1644 }
1645 ArgToken token(const char* str, BasicType type) {
1646 return ArgToken(str, type);
1647 }
1648 const char* string(ArgToken token) {
1649 return token.str();
1650 }
1651 void start_params() {
1652 _param_state <<= 1;
1653 _out->print("(");
1654 }
1655 void end_params() {
1656 if (_verbose) _out->print("\n");
1657 _out->print(") => {");
1658 _param_state >>= 1;
1659 }
1660 void put_type_name(BasicType type, klassOop tk, outputStream* s) {
1661 const char* kname = NULL;
1662 if (tk != NULL)
1663 kname = Klass::cast(tk)->external_name();
1664 s->print("%s", (kname != NULL) ? kname : type2name(type));
1665 }
1666 ArgToken maybe_make_temp(const char* statement_op, BasicType type, const char* temp_name) {
1667 const char* value = strbuf();
1668 if (!_verbose) return token(value, type);
1669 // make an explicit binding for each separate value
1670 _strbuf.print("%s%d", temp_name, ++_temp_num);
1671 const char* temp = strbuf();
1672 _out->print("\n %s %s %s = %s;", statement_op, type2name(type), temp, value);
1673 return token(temp, type);
1674 }
1675
1676 public:
1677 MethodHandlePrinter(Handle root, bool verbose, outputStream* out, TRAPS)
1678 : MethodHandleWalker(root, false, THREAD),
1679 _out(out),
1680 _verbose(verbose),
1681 _param_state(0),
1682 _temp_num(0)
1683 {
1684 start_params();
1685 }
1686 virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
1687 if (argnum < 0) {
1688 end_params();
1689 return token("return", type);
1690 }
1691 if ((_param_state & 1) == 0) {
1692 _param_state |= 1;
1693 _out->print(_verbose ? "\n " : "");
1694 } else {
1695 _out->print(_verbose ? ",\n " : ", ");
1696 }
1697 if (argnum >= _temp_num)
1698 _temp_num = argnum;
1699 // generate an argument name
1700 _strbuf.print("a%d", argnum);
1701 const char* arg = strbuf();
1702 put_type_name(type, tk, _out);
1703 _out->print(" %s", arg);
1704 return token(arg, type);
1705 }
1706 virtual ArgToken make_oop_constant(oop con, TRAPS) {
1707 if (con == NULL)
1708 _strbuf.print("null");
1709 else
1710 con->print_value_on(&_strbuf);
1711 if (_strbuf.size() == 0) { // yuck
1712 _strbuf.print("(a ");
1713 put_type_name(T_OBJECT, con->klass(), &_strbuf);
1714 _strbuf.print(")");
1715 }
1716 return maybe_make_temp("constant", T_OBJECT, "k");
1717 }
1718 virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
1719 java_lang_boxing_object::print(type, con, &_strbuf);
1720 return maybe_make_temp("constant", type, "k");
1721 }
1722 void print_bytecode_name(Bytecodes::Code op) {
1723 if (Bytecodes::is_defined(op))
1724 _strbuf.print("%s", Bytecodes::name(op));
1725 else
1726 _strbuf.print("bytecode_%d", (int) op);
1727 }
1728 virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS) {
1729 print_bytecode_name(op);
1730 _strbuf.print("(%s", string(src));
1731 if (tk != NULL) {
1732 _strbuf.print(", ");
1733 put_type_name(type, tk, &_strbuf);
1734 }
1735 _strbuf.print(")");
1736 return maybe_make_temp("convert", type, "v");
1737 }
1738 virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS) {
1739 _strbuf.print("%s(%s, %s", Bytecodes::name(op), string(base), string(offset));
1740 if (tk != NULL) {
1741 _strbuf.print(", ");
1742 put_type_name(type, tk, &_strbuf);
1743 }
1744 _strbuf.print(")");
1745 return maybe_make_temp("fetch", type, "x");
1746 }
1747 virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid,
1748 Bytecodes::Code op, bool tailcall,
1749 int argc, ArgToken* argv, TRAPS) {
1750 Symbol* name;
1751 Symbol* sig;
1752 if (m != NULL) {
1753 name = m->name();
1754 sig = m->signature();
1755 } else {
1756 name = vmSymbols::symbol_at(vmIntrinsics::name_for(iid));
1757 sig = vmSymbols::symbol_at(vmIntrinsics::signature_for(iid));
1758 }
1759 _strbuf.print("%s %s%s(", Bytecodes::name(op), name->as_C_string(), sig->as_C_string());
1760 for (int i = 0; i < argc; i++) {
1761 _strbuf.print("%s%s", (i > 0 ? ", " : ""), string(argv[i]));
1762 }
1763 _strbuf.print(")");
1764 if (!tailcall) {
1765 BasicType rt = char2type(sig->byte_at(sig->utf8_length()-1));
1766 if (rt == T_ILLEGAL) rt = T_OBJECT; // ';' at the end of '(...)L...;'
1767 return maybe_make_temp("invoke", rt, "x");
1768 } else {
1769 const char* ret = strbuf();
1770 _out->print(_verbose ? "\n return " : " ");
1771 _out->print("%s", ret);
1772 _out->print(_verbose ? "\n}\n" : " }");
1773 }
1774 return ArgToken();
1775 }
1776
1777 virtual void set_method_handle(oop mh) {
1778 if (WizardMode && Verbose) {
1779 tty->print("\n--- next target: ");
1780 mh->print();
1781 }
1782 }
1783
1784 static void print(Handle root, bool verbose, outputStream* out, TRAPS) {
1785 ResourceMark rm;
1786 MethodHandlePrinter printer(root, verbose, out, CHECK);
1787 printer.walk(CHECK);
1788 out->print("\n");
1789 }
1790 static void print(Handle root, bool verbose = Verbose, outputStream* out = tty) {
1791 Thread* THREAD = Thread::current();
1792 ResourceMark rm;
1793 MethodHandlePrinter printer(root, verbose, out, THREAD);
1794 if (!HAS_PENDING_EXCEPTION)
1795 printer.walk(THREAD);
1796 if (HAS_PENDING_EXCEPTION) {
1797 oop ex = PENDING_EXCEPTION;
1798 CLEAR_PENDING_EXCEPTION;
1799 out->print(" *** ");
1800 if (printer.lose_message() != NULL) out->print("%s ", printer.lose_message());
1801 out->print("}");
1802 }
1803 out->print("\n");
1804 }
1805 };
1806
1807 extern "C"
1808 void print_method_handle(oop mh) {
1809 if (!mh->is_oop()) {
1810 tty->print_cr("*** not a method handle: "PTR_FORMAT, (intptr_t)mh);
1811 } else if (java_lang_invoke_MethodHandle::is_instance(mh)) {
1812 MethodHandlePrinter::print(mh);
1813 } else {
1814 tty->print("*** not a method handle: ");
1815 mh->print();
1816 }
1817 }
1818
1819 #endif // PRODUCT