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