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 break;
240
241 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF: {
242 tty->print(" src_type = %s", type2name(chain.adapter_conversion_src_type()));
243 break;
244 }
245
246 case java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS:
247 case java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS: {
248 int dest_arg_slot = chain.adapter_conversion_vminfo();
249 tty->print(" dest_arg_slot %d type %s", dest_arg_slot, type2name(chain.adapter_conversion_src_type()));
250 break;
251 }
252
253 case java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS:
254 case java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS: {
255 int dup_slots = chain.adapter_conversion_stack_pushes();
256 tty->print(" pushes %d", dup_slots);
257 break;
258 }
259
260 case java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS:
261 case java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS: {
262 int coll_slots = chain.MethodHandle_vmslots();
263 tty->print(" coll_slots %d", coll_slots);
264 break;
265 }
266
267 case java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS: {
268 // Check the required length.
269 int spread_slots = 1 + chain.adapter_conversion_stack_pushes();
270 tty->print(" spread_slots %d", spread_slots);
271 break;
272 }
273
274 default:
275 tty->print_cr("bad adapter conversion");
276 break;
277 }
278 } else {
279 // DMH
280 tty->print("direct: ");
281 chain.last_method_oop()->print_short_name(tty);
282 }
283
284 tty->print(" (");
285 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(chain.method_type_oop());
286 for (int i = ptypes->length() - 1; i >= 0; i--) {
287 BasicType t = java_lang_Class::as_BasicType(ptypes->obj_at(i));
288 if (t == T_ARRAY) t = T_OBJECT;
289 tty->print("%c", type2char(t));
290 if (t == T_LONG || t == T_DOUBLE) tty->print("_");
291 }
292 tty->print(")");
293 BasicType rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(chain.method_type_oop()));
294 if (rtype == T_ARRAY) rtype = T_OBJECT;
295 tty->print("%c", type2char(rtype));
296 tty->cr();
297 if (!chain.is_last()) {
298 chain.next(CHECK);
299 } else {
300 break;
301 }
302 }
303 }
304 #endif
305
306
307 // -----------------------------------------------------------------------------
308 // MethodHandleWalker
309
310 Bytecodes::Code MethodHandleWalker::conversion_code(BasicType src, BasicType dest) {
311 if (is_subword_type(src)) {
312 src = T_INT; // all subword src types act like int
313 }
314 if (src == dest) {
315 return Bytecodes::_nop;
316 }
317
318 #define SRC_DEST(s,d) (((int)(s) << 4) + (int)(d))
319 switch (SRC_DEST(src, dest)) {
320 case SRC_DEST(T_INT, T_LONG): return Bytecodes::_i2l;
321 case SRC_DEST(T_INT, T_FLOAT): return Bytecodes::_i2f;
322 case SRC_DEST(T_INT, T_DOUBLE): return Bytecodes::_i2d;
323 case SRC_DEST(T_INT, T_BYTE): return Bytecodes::_i2b;
324 case SRC_DEST(T_INT, T_CHAR): return Bytecodes::_i2c;
325 case SRC_DEST(T_INT, T_SHORT): return Bytecodes::_i2s;
326
327 case SRC_DEST(T_LONG, T_INT): return Bytecodes::_l2i;
328 case SRC_DEST(T_LONG, T_FLOAT): return Bytecodes::_l2f;
329 case SRC_DEST(T_LONG, T_DOUBLE): return Bytecodes::_l2d;
330
331 case SRC_DEST(T_FLOAT, T_INT): return Bytecodes::_f2i;
332 case SRC_DEST(T_FLOAT, T_LONG): return Bytecodes::_f2l;
333 case SRC_DEST(T_FLOAT, T_DOUBLE): return Bytecodes::_f2d;
334
335 case SRC_DEST(T_DOUBLE, T_INT): return Bytecodes::_d2i;
336 case SRC_DEST(T_DOUBLE, T_LONG): return Bytecodes::_d2l;
337 case SRC_DEST(T_DOUBLE, T_FLOAT): return Bytecodes::_d2f;
338 }
339 #undef SRC_DEST
340
341 // cannot do it in one step, or at all
342 return Bytecodes::_illegal;
343 }
344
345
346 // -----------------------------------------------------------------------------
347 // MethodHandleWalker::walk
348 //
349 MethodHandleWalker::ArgToken
350 MethodHandleWalker::walk(TRAPS) {
351 ArgToken empty = ArgToken(); // Empty return value.
352
353 walk_incoming_state(CHECK_(empty));
354
355 for (;;) {
356 set_method_handle(chain().method_handle_oop());
357
358 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
359
360 if (chain().is_adapter()) {
361 int conv_op = chain().adapter_conversion_op();
362 int arg_slot = chain().adapter_arg_slot();
363
364 // Check that the arg_slot is valid. In most cases it must be
365 // within range of the current arguments but there are some
366 // exceptions. Those are sanity checked in their implemention
367 // below.
368 if ((arg_slot < 0 || arg_slot >= _outgoing.length()) &&
369 conv_op > java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW &&
370 conv_op != java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS &&
371 conv_op != java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS) {
372 lose(err_msg("bad argument index %d", arg_slot), CHECK_(empty));
373 }
374
375 bool retain_original_args = false; // used by fold/collect logic
376
377 // perform the adapter action
378 switch (conv_op) {
379 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY:
380 // No changes to arguments; pass the bits through.
381 break;
382
383 case java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW: {
384 // To keep the verifier happy, emit bitwise ("raw") conversions as needed.
385 // See MethodHandles::same_basic_type_for_arguments for allowed conversions.
386 Handle incoming_mtype(THREAD, chain().method_type_oop());
387 Handle outgoing_mtype;
388 {
389 oop outgoing_mh_oop = chain().vmtarget_oop();
390 if (!java_lang_invoke_MethodHandle::is_instance(outgoing_mh_oop))
391 lose("outgoing target not a MethodHandle", CHECK_(empty));
392 outgoing_mtype = Handle(THREAD, java_lang_invoke_MethodHandle::type(outgoing_mh_oop));
393 }
394
395 int nptypes = java_lang_invoke_MethodType::ptype_count(outgoing_mtype());
396 if (nptypes != java_lang_invoke_MethodType::ptype_count(incoming_mtype()))
397 lose("incoming and outgoing parameter count do not agree", CHECK_(empty));
398
399 // Argument types.
400 for (int i = 0, slot = _outgoing.length() - 1; slot >= 0; slot--) {
401 if (arg_type(slot) == T_VOID) continue;
402
403 klassOop src_klass = NULL;
404 klassOop dst_klass = NULL;
405 BasicType src = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(incoming_mtype(), i), &src_klass);
406 BasicType dst = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(outgoing_mtype(), i), &dst_klass);
407 retype_raw_argument_type(src, dst, slot, CHECK_(empty));
408 i++; // We need to skip void slots at the top of the loop.
409 }
410
411 // Return type.
412 {
413 BasicType src = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(incoming_mtype()));
414 BasicType dst = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(outgoing_mtype()));
415 retype_raw_return_type(src, dst, CHECK_(empty));
416 }
417 break;
418 }
419
420 case java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST: {
421 // checkcast the Nth outgoing argument in place
422 klassOop dest_klass = NULL;
423 BasicType dest = java_lang_Class::as_BasicType(chain().adapter_arg_oop(), &dest_klass);
424 assert(dest == T_OBJECT, "");
425 ArgToken arg = _outgoing.at(arg_slot);
426 assert(dest == arg.basic_type(), "");
427 arg = make_conversion(T_OBJECT, dest_klass, Bytecodes::_checkcast, arg, CHECK_(empty));
428 debug_only(dest_klass = (klassOop)badOop);
429 break;
430 }
431
432 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM: {
433 // i2l, etc., on the Nth outgoing argument in place
434 BasicType src = chain().adapter_conversion_src_type(),
435 dest = chain().adapter_conversion_dest_type();
436 ArgToken arg = _outgoing.at(arg_slot);
437 Bytecodes::Code bc = conversion_code(src, dest);
438 if (bc == Bytecodes::_nop) {
439 break;
440 } else if (bc != Bytecodes::_illegal) {
441 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty));
442 } else if (is_subword_type(dest)) {
443 bc = conversion_code(src, T_INT);
444 if (bc != Bytecodes::_illegal) {
445 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty));
446 bc = conversion_code(T_INT, dest);
447 arg = make_conversion(dest, NULL, bc, arg, CHECK_(empty));
448 }
449 }
450 if (bc == Bytecodes::_illegal) {
451 lose(err_msg("bad primitive conversion for %s -> %s", type2name(src), type2name(dest)), CHECK_(empty));
452 }
453 change_argument(src, arg_slot, dest, arg);
454 break;
455 }
456
457 case java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM: {
458 // checkcast to wrapper type & call intValue, etc.
459 BasicType dest = chain().adapter_conversion_dest_type();
460 ArgToken arg = _outgoing.at(arg_slot);
461 arg = make_conversion(T_OBJECT, SystemDictionary::box_klass(dest),
462 Bytecodes::_checkcast, arg, CHECK_(empty));
463 vmIntrinsics::ID unboxer = vmIntrinsics::for_unboxing(dest);
464 if (unboxer == vmIntrinsics::_none) {
465 lose("no unboxing method", CHECK_(empty));
466 }
467 ArgToken arglist[2];
468 arglist[0] = arg; // outgoing 'this'
469 arglist[1] = ArgToken(); // sentinel
470 arg = make_invoke(NULL, unboxer, Bytecodes::_invokevirtual, false, 1, &arglist[0], CHECK_(empty));
471 change_argument(T_OBJECT, arg_slot, dest, arg);
472 break;
473 }
474
475 case java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF: {
476 // call wrapper type.valueOf
477 BasicType src = chain().adapter_conversion_src_type();
478 vmIntrinsics::ID boxer = vmIntrinsics::for_boxing(src);
479 if (boxer == vmIntrinsics::_none) {
480 lose("no boxing method", CHECK_(empty));
481 }
482 ArgToken arg = _outgoing.at(arg_slot);
483 ArgToken arglist[2];
484 arglist[0] = arg; // outgoing value
485 arglist[1] = ArgToken(); // sentinel
486 arg = make_invoke(NULL, boxer, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK_(empty));
487 change_argument(src, arg_slot, T_OBJECT, arg);
488 break;
489 }
490
491 case java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS: {
492 int dest_arg_slot = chain().adapter_conversion_vminfo();
493 if (!has_argument(dest_arg_slot)) {
494 lose("bad swap index", CHECK_(empty));
495 }
496 // a simple swap between two arguments
497 if (arg_slot > dest_arg_slot) {
498 int tmp = arg_slot;
499 arg_slot = dest_arg_slot;
500 dest_arg_slot = tmp;
501 }
502 ArgToken a1 = _outgoing.at(arg_slot);
503 ArgToken a2 = _outgoing.at(dest_arg_slot);
504 change_argument(a2.basic_type(), dest_arg_slot, a1);
505 change_argument(a1.basic_type(), arg_slot, a2);
506 break;
507 }
508
509 case java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS: {
510 int limit_raw = chain().adapter_conversion_vminfo();
511 bool rot_down = (arg_slot < limit_raw);
512 int limit_bias = (rot_down ? MethodHandles::OP_ROT_ARGS_DOWN_LIMIT_BIAS : 0);
513 int limit_slot = limit_raw - limit_bias;
514 if ((uint)limit_slot > (uint)_outgoing.length()) {
515 lose("bad rotate index", CHECK_(empty));
516 }
517 // Rotate the source argument (plus following N slots) into the
518 // position occupied by the dest argument (plus following N slots).
519 int rotate_count = type2size[chain().adapter_conversion_src_type()];
520 // (no other rotate counts are currently supported)
521 if (rot_down) {
522 for (int i = 0; i < rotate_count; i++) {
523 ArgToken temp = _outgoing.at(arg_slot);
524 _outgoing.remove_at(arg_slot);
525 _outgoing.insert_before(limit_slot - 1, temp);
526 }
527 } else { // arg_slot > limit_slot => rotate_up
528 for (int i = 0; i < rotate_count; i++) {
529 ArgToken temp = _outgoing.at(arg_slot + rotate_count - 1);
530 _outgoing.remove_at(arg_slot + rotate_count - 1);
531 _outgoing.insert_before(limit_slot, temp);
532 }
533 }
534 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
535 break;
536 }
537
538 case java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS: {
539 int dup_slots = chain().adapter_conversion_stack_pushes();
540 if (dup_slots <= 0) {
541 lose("bad dup count", CHECK_(empty));
542 }
543 for (int i = 0; i < dup_slots; i++) {
544 ArgToken dup = _outgoing.at(arg_slot + 2*i);
545 if (dup.basic_type() != T_VOID) _outgoing_argc += 1;
546 _outgoing.insert_before(i, dup);
547 }
548 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
549 break;
550 }
551
552 case java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS: {
553 int drop_slots = -chain().adapter_conversion_stack_pushes();
554 if (drop_slots <= 0) {
555 lose("bad drop count", CHECK_(empty));
556 }
557 for (int i = 0; i < drop_slots; i++) {
558 ArgToken drop = _outgoing.at(arg_slot);
559 if (drop.basic_type() != T_VOID) _outgoing_argc -= 1;
560 _outgoing.remove_at(arg_slot);
561 }
562 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
563 break;
564 }
565
566 case java_lang_invoke_AdapterMethodHandle::OP_FOLD_ARGS:
567 retain_original_args = true; // and fall through:
568 case java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS: {
569 // call argument MH recursively
570 //{static int x; if (!x++) print_method_handle(chain().method_handle_oop()); --x;}
571 Handle recursive_mh(THREAD, chain().adapter_arg_oop());
572 if (!java_lang_invoke_MethodHandle::is_instance(recursive_mh())) {
573 lose("recursive target not a MethodHandle", CHECK_(empty));
574 }
575 Handle recursive_mtype(THREAD, java_lang_invoke_MethodHandle::type(recursive_mh()));
576 int argc = java_lang_invoke_MethodType::ptype_count(recursive_mtype());
577 int coll_slots = java_lang_invoke_MethodHandle::vmslots(recursive_mh());
578 BasicType rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(recursive_mtype()));
579 ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, 1 + argc + 1); // 1+: mh, +1: sentinel
580 arglist[0] = make_oop_constant(recursive_mh(), CHECK_(empty));
581 if (arg_slot < 0 || coll_slots < 0 || arg_slot + coll_slots > _outgoing.length()) {
582 lose("bad fold/collect arg slot", CHECK_(empty));
583 }
584 for (int i = 0, slot = arg_slot + coll_slots - 1; slot >= arg_slot; slot--) {
585 ArgToken arg_state = _outgoing.at(slot);
586 BasicType arg_type = arg_state.basic_type();
587 if (arg_type == T_VOID) continue;
588 ArgToken arg = _outgoing.at(slot);
589 if (i >= argc) { lose("bad fold/collect arg", CHECK_(empty)); }
590 arglist[1+i] = arg;
591 if (!retain_original_args)
592 change_argument(arg_type, slot, T_VOID, ArgToken(tt_void));
593 i++;
594 }
595 arglist[1+argc] = ArgToken(); // sentinel
596 oop invoker = java_lang_invoke_MethodTypeForm::vmlayout(
597 java_lang_invoke_MethodType::form(recursive_mtype()) );
598 if (invoker == NULL || !invoker->is_method()) {
599 lose("bad vmlayout slot", CHECK_(empty));
600 }
601 // FIXME: consider inlining the invokee at the bytecode level
602 ArgToken ret = make_invoke(methodOop(invoker), vmIntrinsics::_none,
603 Bytecodes::_invokevirtual, false, 1+argc, &arglist[0], CHECK_(empty));
604 DEBUG_ONLY(invoker = NULL);
605 if (rtype == T_OBJECT) {
606 klassOop rklass = java_lang_Class::as_klassOop( java_lang_invoke_MethodType::rtype(recursive_mtype()) );
607 if (rklass != SystemDictionary::Object_klass() &&
608 !Klass::cast(rklass)->is_interface()) {
609 // preserve type safety
610 ret = make_conversion(T_OBJECT, rklass, Bytecodes::_checkcast, ret, CHECK_(empty));
611 }
612 }
613 if (rtype != T_VOID) {
614 int ret_slot = arg_slot + (retain_original_args ? coll_slots : 0);
615 change_argument(T_VOID, ret_slot, rtype, ret);
616 }
617 break;
618 }
619
620 case java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS: {
621 klassOop array_klass_oop = NULL;
622 BasicType array_type = java_lang_Class::as_BasicType(chain().adapter_arg_oop(),
623 &array_klass_oop);
624 assert(array_type == T_OBJECT, "");
625 assert(Klass::cast(array_klass_oop)->oop_is_array(), "");
626 arrayKlassHandle array_klass(THREAD, array_klass_oop);
627 debug_only(array_klass_oop = (klassOop)badOop);
628
629 klassOop element_klass_oop = NULL;
630 BasicType element_type = java_lang_Class::as_BasicType(array_klass->component_mirror(),
631 &element_klass_oop);
632 KlassHandle element_klass(THREAD, element_klass_oop);
633 debug_only(element_klass_oop = (klassOop)badOop);
634
635 // Fetch the argument, which we will cast to the required array type.
636 ArgToken arg = _outgoing.at(arg_slot);
637 assert(arg.basic_type() == T_OBJECT, "");
638 ArgToken array_arg = arg;
639 array_arg = make_conversion(T_OBJECT, array_klass(), Bytecodes::_checkcast, array_arg, CHECK_(empty));
640 change_argument(T_OBJECT, arg_slot, T_VOID, ArgToken(tt_void));
641
642 // Check the required length.
643 int spread_slots = 1 + chain().adapter_conversion_stack_pushes();
644 int spread_length = spread_slots;
645 if (type2size[element_type] == 2) {
646 if (spread_slots % 2 != 0) spread_slots = -1; // force error
647 spread_length = spread_slots / 2;
648 }
649 if (spread_slots < 0) {
650 lose("bad spread length", CHECK_(empty));
651 }
652
653 jvalue length_jvalue; length_jvalue.i = spread_length;
654 ArgToken length_arg = make_prim_constant(T_INT, &length_jvalue, CHECK_(empty));
655 // Call a built-in method known to the JVM to validate the length.
656 ArgToken arglist[3];
657 arglist[0] = array_arg; // value to check
658 arglist[1] = length_arg; // length to check
659 arglist[2] = ArgToken(); // sentinel
660 make_invoke(NULL, vmIntrinsics::_checkSpreadArgument,
661 Bytecodes::_invokestatic, false, 2, &arglist[0], CHECK_(empty));
662
663 // Spread out the array elements.
664 Bytecodes::Code aload_op = Bytecodes::_nop;
665 switch (element_type) {
666 case T_INT: aload_op = Bytecodes::_iaload; break;
667 case T_LONG: aload_op = Bytecodes::_laload; break;
668 case T_FLOAT: aload_op = Bytecodes::_faload; break;
669 case T_DOUBLE: aload_op = Bytecodes::_daload; break;
670 case T_OBJECT: aload_op = Bytecodes::_aaload; break;
671 case T_BOOLEAN: // fall through:
672 case T_BYTE: aload_op = Bytecodes::_baload; break;
673 case T_CHAR: aload_op = Bytecodes::_caload; break;
674 case T_SHORT: aload_op = Bytecodes::_saload; break;
675 default: lose("primitive array NYI", CHECK_(empty));
676 }
677 int ap = arg_slot;
678 for (int i = 0; i < spread_length; i++) {
679 jvalue offset_jvalue; offset_jvalue.i = i;
680 ArgToken offset_arg = make_prim_constant(T_INT, &offset_jvalue, CHECK_(empty));
681 ArgToken element_arg = make_fetch(element_type, element_klass(), aload_op, array_arg, offset_arg, CHECK_(empty));
682 change_argument(T_VOID, ap, element_type, element_arg);
683 ap += type2size[element_type];
684 }
685 break;
686 }
687
688 default:
689 lose("bad adapter conversion", CHECK_(empty));
690 break;
691 }
692 }
693
694 if (chain().is_bound()) {
695 // push a new argument
696 BasicType arg_type = chain().bound_arg_type();
697 jint arg_slot = chain().bound_arg_slot();
698 oop arg_oop = chain().bound_arg_oop();
699 ArgToken arg;
700 if (arg_type == T_OBJECT) {
701 arg = make_oop_constant(arg_oop, CHECK_(empty));
702 } else {
703 jvalue arg_value;
704 BasicType bt = java_lang_boxing_object::get_value(arg_oop, &arg_value);
705 if (bt == arg_type || (bt == T_INT && is_subword_type(arg_type))) {
706 arg = make_prim_constant(arg_type, &arg_value, CHECK_(empty));
707 } else {
708 lose(err_msg("bad bound value: arg_type %s boxing %s", type2name(arg_type), type2name(bt)), CHECK_(empty));
709 }
710 }
711 DEBUG_ONLY(arg_oop = badOop);
712 change_argument(T_VOID, arg_slot, arg_type, arg);
713 }
714
715 // this test must come after the body of the loop
716 if (!chain().is_last()) {
717 chain().next(CHECK_(empty));
718 } else {
719 break;
720 }
721 }
722
723 // finish the sequence with a tail-call to the ultimate target
724 // parameters are passed in logical order (recv 1st), not slot order
725 ArgToken* arglist = NEW_RESOURCE_ARRAY(ArgToken, _outgoing.length() + 1);
726 int ap = 0;
727 for (int i = _outgoing.length() - 1; i >= 0; i--) {
728 ArgToken arg_state = _outgoing.at(i);
729 if (arg_state.basic_type() == T_VOID) continue;
730 arglist[ap++] = _outgoing.at(i);
731 }
732 assert(ap == _outgoing_argc, "");
733 arglist[ap] = ArgToken(); // add a sentinel, for the sake of asserts
734 return make_invoke(chain().last_method_oop(),
735 vmIntrinsics::_none,
736 chain().last_invoke_code(), true,
737 ap, arglist, THREAD);
738 }
739
740
741 // -----------------------------------------------------------------------------
742 // MethodHandleWalker::walk_incoming_state
743 //
744 void MethodHandleWalker::walk_incoming_state(TRAPS) {
745 Handle mtype(THREAD, chain().method_type_oop());
746 int nptypes = java_lang_invoke_MethodType::ptype_count(mtype());
747 _outgoing_argc = nptypes;
748 int argp = nptypes - 1;
749 if (argp >= 0) {
750 _outgoing.at_grow(argp, ArgToken(tt_void)); // presize
751 }
752 for (int i = 0; i < nptypes; i++) {
753 klassOop arg_type_klass = NULL;
754 BasicType arg_type = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::ptype(mtype(), i), &arg_type_klass);
755 int index = new_local_index(arg_type);
756 ArgToken arg = make_parameter(arg_type, arg_type_klass, index, CHECK);
757 DEBUG_ONLY(arg_type_klass = (klassOop) NULL);
758 _outgoing.at_put(argp, arg);
759 if (type2size[arg_type] == 2) {
760 // add the extra slot, so we can model the JVM stack
761 _outgoing.insert_before(argp+1, ArgToken(tt_void));
762 }
763 --argp;
764 }
765 // call make_parameter at the end of the list for the return type
766 klassOop ret_type_klass = NULL;
767 BasicType ret_type = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(mtype()), &ret_type_klass);
768 ArgToken ret = make_parameter(ret_type, ret_type_klass, -1, CHECK);
769 // ignore ret; client can catch it if needed
770
771 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
772
773 verify_args_and_signature(CHECK);
774 }
775
776
777 #ifdef ASSERT
778 void MethodHandleWalker::verify_args_and_signature(TRAPS) {
779 int index = _outgoing.length() - 1;
780 objArrayOop ptypes = java_lang_invoke_MethodType::ptypes(chain().method_type_oop());
781 for (int i = 0, limit = ptypes->length(); i < limit; i++) {
782 BasicType t = java_lang_Class::as_BasicType(ptypes->obj_at(i));
783 if (t == T_ARRAY) t = T_OBJECT;
784 if (t == T_LONG || t == T_DOUBLE) {
785 assert(T_VOID == _outgoing.at(index).basic_type(), "types must match");
786 index--;
787 }
788 assert(t == _outgoing.at(index).basic_type(), "types must match");
789 index--;
790 }
791 }
792 #endif
793
794
795 // -----------------------------------------------------------------------------
796 // MethodHandleWalker::change_argument
797 //
798 // This is messy because some kinds of arguments are paired with
799 // companion slots containing an empty value.
800 void MethodHandleWalker::change_argument(BasicType old_type, int slot, const ArgToken& new_arg) {
801 BasicType new_type = new_arg.basic_type();
802 int old_size = type2size[old_type];
803 int new_size = type2size[new_type];
804 if (old_size == new_size) {
805 // simple case first
806 _outgoing.at_put(slot, new_arg);
807 } else if (old_size > new_size) {
808 for (int i = old_size - 1; i >= new_size; i--) {
809 assert((i != 0) == (_outgoing.at(slot + i).basic_type() == T_VOID), "");
810 _outgoing.remove_at(slot + i);
811 }
812 if (new_size > 0)
813 _outgoing.at_put(slot, new_arg);
814 else
815 _outgoing_argc -= 1; // deleted a real argument
816 } else {
817 for (int i = old_size; i < new_size; i++) {
818 _outgoing.insert_before(slot + i, ArgToken(tt_void));
819 }
820 _outgoing.at_put(slot, new_arg);
821 if (old_size == 0)
822 _outgoing_argc += 1; // inserted a real argument
823 }
824 assert(_outgoing_argc == argument_count_slow(), "empty slots under control");
825 }
826
827
828 #ifdef ASSERT
829 int MethodHandleWalker::argument_count_slow() {
830 int args_seen = 0;
831 for (int i = _outgoing.length() - 1; i >= 0; i--) {
832 if (_outgoing.at(i).basic_type() != T_VOID) {
833 ++args_seen;
834 if (_outgoing.at(i).basic_type() == T_LONG ||
835 _outgoing.at(i).basic_type() == T_DOUBLE) {
836 assert(_outgoing.at(i + 1).basic_type() == T_VOID, "should only follow two word");
837 }
838 } else {
839 assert(_outgoing.at(i - 1).basic_type() == T_LONG ||
840 _outgoing.at(i - 1).basic_type() == T_DOUBLE, "should only follow two word");
841 }
842 }
843 return args_seen;
844 }
845 #endif
846
847
848 // -----------------------------------------------------------------------------
849 // MethodHandleWalker::retype_raw_conversion
850 //
851 // Do the raw retype conversions for OP_RETYPE_RAW.
852 void MethodHandleWalker::retype_raw_conversion(BasicType src, BasicType dst, bool for_return, int slot, TRAPS) {
853 if (src != dst) {
854 if (MethodHandles::same_basic_type_for_returns(src, dst, /*raw*/ true)) {
855 if (MethodHandles::is_float_fixed_reinterpretation_cast(src, dst)) {
856 if (for_return) Untested("MHW return raw conversion"); // still untested
857 vmIntrinsics::ID iid = vmIntrinsics::for_raw_conversion(src, dst);
858 if (iid == vmIntrinsics::_none) {
859 lose("no raw conversion method", CHECK);
860 }
861 ArgToken arglist[2];
862 if (!for_return) {
863 // argument type conversion
864 ArgToken arg = _outgoing.at(slot);
865 assert(arg.token_type() >= tt_symbolic || src == arg.basic_type(), "sanity");
866 arglist[0] = arg; // outgoing 'this'
867 arglist[1] = ArgToken(); // sentinel
868 arg = make_invoke(NULL, iid, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK);
869 change_argument(src, slot, dst, arg);
870 } else {
871 // return type conversion
872 klassOop arg_klass = NULL;
873 arglist[0] = make_parameter(src, arg_klass, -1, CHECK); // return value
874 arglist[1] = ArgToken(); // sentinel
875 (void) make_invoke(NULL, iid, Bytecodes::_invokestatic, false, 1, &arglist[0], CHECK);
876 }
877 } else {
878 // Nothing to do.
879 }
880 } else if (src == T_OBJECT && is_java_primitive(dst)) {
881 // ref-to-prim: discard ref, push zero
882 lose("requested ref-to-prim conversion not expected", CHECK);
883 } else {
884 lose(err_msg("requested raw conversion not allowed: %s -> %s", type2name(src), type2name(dst)), CHECK);
885 }
886 }
887 }
888
889
890 // -----------------------------------------------------------------------------
891 // MethodHandleCompiler
892
893 MethodHandleCompiler::MethodHandleCompiler(Handle root, Symbol* name, Symbol* signature, int invoke_count, bool is_invokedynamic, TRAPS)
894 : MethodHandleWalker(root, is_invokedynamic, THREAD),
895 _invoke_count(invoke_count),
896 _thread(THREAD),
897 _bytecode(THREAD, 50),
898 _constants(THREAD, 10),
899 _cur_stack(0),
900 _max_stack(0),
901 _rtype(T_ILLEGAL)
902 {
903
904 // Element zero is always the null constant.
905 (void) _constants.append(NULL);
906
907 // Set name and signature index.
908 _name_index = cpool_symbol_put(name);
909 _signature_index = cpool_symbol_put(signature);
910
911 // Get return type klass.
912 Handle first_mtype(THREAD, chain().method_type_oop());
913 // _rklass is NULL for primitives.
914 _rtype = java_lang_Class::as_BasicType(java_lang_invoke_MethodType::rtype(first_mtype()), &_rklass);
915 if (_rtype == T_ARRAY) _rtype = T_OBJECT;
916
917 ArgumentSizeComputer args(signature);
918 int params = args.size() + 1; // Incoming arguments plus receiver.
919 _num_params = for_invokedynamic() ? params - 1 : params; // XXX Check if callee is static?
920 }
921
922
923 // -----------------------------------------------------------------------------
924 // MethodHandleCompiler::compile
925 //
926 // Compile this MethodHandle into a bytecode adapter and return a
927 // methodOop.
928 methodHandle MethodHandleCompiler::compile(TRAPS) {
929 assert(_thread == THREAD, "must be same thread");
930 methodHandle nullHandle;
931 (void) walk(CHECK_(nullHandle));
932 return get_method_oop(CHECK_(nullHandle));
933 }
934
935
936 void MethodHandleCompiler::emit_bc(Bytecodes::Code op, int index, int args_size) {
937 Bytecodes::check(op); // Are we legal?
938
939 switch (op) {
940 // b
941 case Bytecodes::_aconst_null:
942 case Bytecodes::_iconst_m1:
943 case Bytecodes::_iconst_0:
944 case Bytecodes::_iconst_1:
945 case Bytecodes::_iconst_2:
946 case Bytecodes::_iconst_3:
947 case Bytecodes::_iconst_4:
948 case Bytecodes::_iconst_5:
949 case Bytecodes::_lconst_0:
950 case Bytecodes::_lconst_1:
951 case Bytecodes::_fconst_0:
952 case Bytecodes::_fconst_1:
953 case Bytecodes::_fconst_2:
954 case Bytecodes::_dconst_0:
955 case Bytecodes::_dconst_1:
956 case Bytecodes::_iload_0:
957 case Bytecodes::_iload_1:
958 case Bytecodes::_iload_2:
959 case Bytecodes::_iload_3:
960 case Bytecodes::_lload_0:
961 case Bytecodes::_lload_1:
962 case Bytecodes::_lload_2:
963 case Bytecodes::_lload_3:
964 case Bytecodes::_fload_0:
965 case Bytecodes::_fload_1:
966 case Bytecodes::_fload_2:
967 case Bytecodes::_fload_3:
968 case Bytecodes::_dload_0:
969 case Bytecodes::_dload_1:
970 case Bytecodes::_dload_2:
971 case Bytecodes::_dload_3:
972 case Bytecodes::_aload_0:
973 case Bytecodes::_aload_1:
974 case Bytecodes::_aload_2:
975 case Bytecodes::_aload_3:
976 case Bytecodes::_istore_0:
977 case Bytecodes::_istore_1:
978 case Bytecodes::_istore_2:
979 case Bytecodes::_istore_3:
980 case Bytecodes::_lstore_0:
981 case Bytecodes::_lstore_1:
982 case Bytecodes::_lstore_2:
983 case Bytecodes::_lstore_3:
984 case Bytecodes::_fstore_0:
985 case Bytecodes::_fstore_1:
986 case Bytecodes::_fstore_2:
987 case Bytecodes::_fstore_3:
988 case Bytecodes::_dstore_0:
989 case Bytecodes::_dstore_1:
990 case Bytecodes::_dstore_2:
991 case Bytecodes::_dstore_3:
992 case Bytecodes::_astore_0:
993 case Bytecodes::_astore_1:
994 case Bytecodes::_astore_2:
995 case Bytecodes::_astore_3:
996 case Bytecodes::_iand:
997 case Bytecodes::_i2l:
998 case Bytecodes::_i2f:
999 case Bytecodes::_i2d:
1000 case Bytecodes::_i2b:
1001 case Bytecodes::_i2c:
1002 case Bytecodes::_i2s:
1003 case Bytecodes::_l2i:
1004 case Bytecodes::_l2f:
1005 case Bytecodes::_l2d:
1006 case Bytecodes::_f2i:
1007 case Bytecodes::_f2l:
1008 case Bytecodes::_f2d:
1009 case Bytecodes::_d2i:
1010 case Bytecodes::_d2l:
1011 case Bytecodes::_d2f:
1012 case Bytecodes::_iaload:
1013 case Bytecodes::_laload:
1014 case Bytecodes::_faload:
1015 case Bytecodes::_daload:
1016 case Bytecodes::_aaload:
1017 case Bytecodes::_baload:
1018 case Bytecodes::_caload:
1019 case Bytecodes::_saload:
1020 case Bytecodes::_ireturn:
1021 case Bytecodes::_lreturn:
1022 case Bytecodes::_freturn:
1023 case Bytecodes::_dreturn:
1024 case Bytecodes::_areturn:
1025 case Bytecodes::_return:
1026 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_b, "wrong bytecode format");
1027 _bytecode.push(op);
1028 break;
1029
1030 // bi
1031 case Bytecodes::_ldc:
1032 assert(Bytecodes::format_bits(op, false) == (Bytecodes::_fmt_b|Bytecodes::_fmt_has_k), "wrong bytecode format");
1033 if (index == (index & 0xff)) {
1034 _bytecode.push(op);
1035 _bytecode.push(index);
1036 } else {
1037 _bytecode.push(Bytecodes::_ldc_w);
1038 _bytecode.push(index >> 8);
1039 _bytecode.push(index);
1040 }
1041 break;
1042
1043 case Bytecodes::_iload:
1044 case Bytecodes::_lload:
1045 case Bytecodes::_fload:
1046 case Bytecodes::_dload:
1047 case Bytecodes::_aload:
1048 case Bytecodes::_istore:
1049 case Bytecodes::_lstore:
1050 case Bytecodes::_fstore:
1051 case Bytecodes::_dstore:
1052 case Bytecodes::_astore:
1053 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bi, "wrong bytecode format");
1054 if (index == (index & 0xff)) {
1055 _bytecode.push(op);
1056 _bytecode.push(index);
1057 } else {
1058 // doesn't fit in a u2
1059 _bytecode.push(Bytecodes::_wide);
1060 _bytecode.push(op);
1061 _bytecode.push(index >> 8);
1062 _bytecode.push(index);
1063 }
1064 break;
1065
1066 // bkk
1067 case Bytecodes::_ldc_w:
1068 case Bytecodes::_ldc2_w:
1069 case Bytecodes::_checkcast:
1070 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bkk, "wrong bytecode format");
1071 assert((unsigned short) index == index, "index does not fit in 16-bit");
1072 _bytecode.push(op);
1073 _bytecode.push(index >> 8);
1074 _bytecode.push(index);
1075 break;
1076
1077 // bJJ
1078 case Bytecodes::_invokestatic:
1079 case Bytecodes::_invokespecial:
1080 case Bytecodes::_invokevirtual:
1081 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bJJ, "wrong bytecode format");
1082 assert((unsigned short) index == index, "index does not fit in 16-bit");
1083 _bytecode.push(op);
1084 _bytecode.push(index >> 8);
1085 _bytecode.push(index);
1086 break;
1087
1088 case Bytecodes::_invokeinterface:
1089 assert(Bytecodes::format_bits(op, false) == Bytecodes::_fmt_bJJ, "wrong bytecode format");
1090 assert((unsigned short) index == index, "index does not fit in 16-bit");
1091 assert(args_size > 0, "valid args_size");
1092 _bytecode.push(op);
1093 _bytecode.push(index >> 8);
1094 _bytecode.push(index);
1095 _bytecode.push(args_size);
1096 _bytecode.push(0);
1097 break;
1098
1099 default:
1100 ShouldNotReachHere();
1101 }
1102 }
1103
1104
1105 void MethodHandleCompiler::emit_load(BasicType bt, int index) {
1106 if (index <= 3) {
1107 switch (bt) {
1108 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1109 case T_INT: emit_bc(Bytecodes::cast(Bytecodes::_iload_0 + index)); break;
1110 case T_LONG: emit_bc(Bytecodes::cast(Bytecodes::_lload_0 + index)); break;
1111 case T_FLOAT: emit_bc(Bytecodes::cast(Bytecodes::_fload_0 + index)); break;
1112 case T_DOUBLE: emit_bc(Bytecodes::cast(Bytecodes::_dload_0 + index)); break;
1113 case T_OBJECT: emit_bc(Bytecodes::cast(Bytecodes::_aload_0 + index)); break;
1114 default:
1115 ShouldNotReachHere();
1116 }
1117 }
1118 else {
1119 switch (bt) {
1120 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1121 case T_INT: emit_bc(Bytecodes::_iload, index); break;
1122 case T_LONG: emit_bc(Bytecodes::_lload, index); break;
1123 case T_FLOAT: emit_bc(Bytecodes::_fload, index); break;
1124 case T_DOUBLE: emit_bc(Bytecodes::_dload, index); break;
1125 case T_OBJECT: emit_bc(Bytecodes::_aload, index); break;
1126 default:
1127 ShouldNotReachHere();
1128 }
1129 }
1130 stack_push(bt);
1131 }
1132
1133 void MethodHandleCompiler::emit_store(BasicType bt, int index) {
1134 if (index <= 3) {
1135 switch (bt) {
1136 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1137 case T_INT: emit_bc(Bytecodes::cast(Bytecodes::_istore_0 + index)); break;
1138 case T_LONG: emit_bc(Bytecodes::cast(Bytecodes::_lstore_0 + index)); break;
1139 case T_FLOAT: emit_bc(Bytecodes::cast(Bytecodes::_fstore_0 + index)); break;
1140 case T_DOUBLE: emit_bc(Bytecodes::cast(Bytecodes::_dstore_0 + index)); break;
1141 case T_OBJECT: emit_bc(Bytecodes::cast(Bytecodes::_astore_0 + index)); break;
1142 default:
1143 ShouldNotReachHere();
1144 }
1145 }
1146 else {
1147 switch (bt) {
1148 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1149 case T_INT: emit_bc(Bytecodes::_istore, index); break;
1150 case T_LONG: emit_bc(Bytecodes::_lstore, index); break;
1151 case T_FLOAT: emit_bc(Bytecodes::_fstore, index); break;
1152 case T_DOUBLE: emit_bc(Bytecodes::_dstore, index); break;
1153 case T_OBJECT: emit_bc(Bytecodes::_astore, index); break;
1154 default:
1155 ShouldNotReachHere();
1156 }
1157 }
1158 stack_pop(bt);
1159 }
1160
1161
1162 void MethodHandleCompiler::emit_load_constant(ArgToken arg) {
1163 BasicType bt = arg.basic_type();
1164 if (is_subword_type(bt)) bt = T_INT;
1165 switch (bt) {
1166 case T_INT: {
1167 jint value = arg.get_jint();
1168 if (-1 <= value && value <= 5)
1169 emit_bc(Bytecodes::cast(Bytecodes::_iconst_0 + value));
1170 else
1171 emit_bc(Bytecodes::_ldc, cpool_int_put(value));
1172 break;
1173 }
1174 case T_LONG: {
1175 jlong value = arg.get_jlong();
1176 if (0 <= value && value <= 1)
1177 emit_bc(Bytecodes::cast(Bytecodes::_lconst_0 + (int) value));
1178 else
1179 emit_bc(Bytecodes::_ldc2_w, cpool_long_put(value));
1180 break;
1181 }
1182 case T_FLOAT: {
1183 jfloat value = arg.get_jfloat();
1184 if (value == 0.0 || value == 1.0 || value == 2.0)
1185 emit_bc(Bytecodes::cast(Bytecodes::_fconst_0 + (int) value));
1186 else
1187 emit_bc(Bytecodes::_ldc, cpool_float_put(value));
1188 break;
1189 }
1190 case T_DOUBLE: {
1191 jdouble value = arg.get_jdouble();
1192 if (value == 0.0 || value == 1.0)
1193 emit_bc(Bytecodes::cast(Bytecodes::_dconst_0 + (int) value));
1194 else
1195 emit_bc(Bytecodes::_ldc2_w, cpool_double_put(value));
1196 break;
1197 }
1198 case T_OBJECT: {
1199 Handle value = arg.object();
1200 if (value.is_null())
1201 emit_bc(Bytecodes::_aconst_null);
1202 else
1203 emit_bc(Bytecodes::_ldc, cpool_object_put(value));
1204 break;
1205 }
1206 default:
1207 ShouldNotReachHere();
1208 }
1209 stack_push(bt);
1210 }
1211
1212
1213 MethodHandleWalker::ArgToken
1214 MethodHandleCompiler::make_conversion(BasicType type, klassOop tk, Bytecodes::Code op,
1215 const ArgToken& src, TRAPS) {
1216
1217 BasicType srctype = src.basic_type();
1218 TokenType tt = src.token_type();
1219 int index = -1;
1220
1221 switch (op) {
1222 case Bytecodes::_i2l:
1223 case Bytecodes::_i2f:
1224 case Bytecodes::_i2d:
1225 case Bytecodes::_i2b:
1226 case Bytecodes::_i2c:
1227 case Bytecodes::_i2s:
1228
1229 case Bytecodes::_l2i:
1230 case Bytecodes::_l2f:
1231 case Bytecodes::_l2d:
1232
1233 case Bytecodes::_f2i:
1234 case Bytecodes::_f2l:
1235 case Bytecodes::_f2d:
1236
1237 case Bytecodes::_d2i:
1238 case Bytecodes::_d2l:
1239 case Bytecodes::_d2f:
1240 if (tt == tt_constant) {
1241 emit_load_constant(src);
1242 } else {
1243 emit_load(srctype, src.index());
1244 }
1245 stack_pop(srctype); // pop the src type
1246 emit_bc(op);
1247 stack_push(type); // push the dest value
1248 if (tt != tt_constant)
1249 index = src.index();
1250 if (srctype != type || index == -1)
1251 index = new_local_index(type);
1252 emit_store(type, index);
1253 break;
1254
1255 case Bytecodes::_checkcast:
1256 if (tt == tt_constant) {
1257 emit_load_constant(src);
1258 } else {
1259 emit_load(srctype, src.index());
1260 index = src.index();
1261 }
1262 emit_bc(op, cpool_klass_put(tk));
1263 // Allocate a new local for the type so that we don't hide the
1264 // previous type from the verifier.
1265 index = new_local_index(type);
1266 emit_store(srctype, index);
1267 break;
1268
1269 case Bytecodes::_nop:
1270 // nothing to do
1271 return src;
1272
1273 default:
1274 if (op == Bytecodes::_illegal)
1275 lose(err_msg("no such primitive conversion: %s -> %s", type2name(src.basic_type()), type2name(type)), THREAD);
1276 else
1277 lose(err_msg("bad primitive conversion op: %s", Bytecodes::name(op)), THREAD);
1278 return make_prim_constant(type, &zero_jvalue, THREAD);
1279 }
1280
1281 return make_parameter(type, tk, index, THREAD);
1282 }
1283
1284
1285 // -----------------------------------------------------------------------------
1286 // MethodHandleCompiler
1287 //
1288
1289 // Values used by the compiler.
1290 jvalue MethodHandleCompiler::zero_jvalue = { 0 };
1291 jvalue MethodHandleCompiler::one_jvalue = { 1 };
1292
1293 // Emit bytecodes for the given invoke instruction.
1294 MethodHandleWalker::ArgToken
1295 MethodHandleCompiler::make_invoke(methodOop m, vmIntrinsics::ID iid,
1296 Bytecodes::Code op, bool tailcall,
1297 int argc, MethodHandleWalker::ArgToken* argv,
1298 TRAPS) {
1299 ArgToken zero;
1300 if (m == NULL) {
1301 // Get the intrinsic methodOop.
1302 m = vmIntrinsics::method_for(iid);
1303 if (m == NULL) {
1304 lose(vmIntrinsics::name_at(iid), CHECK_(zero));
1305 }
1306 }
1307
1308 klassOop klass = m->method_holder();
1309 Symbol* name = m->name();
1310 Symbol* signature = m->signature();
1311
1312 // Count the number of arguments, not the size
1313 ArgumentCount asc(signature);
1314 assert(argc == asc.size() + ((op == Bytecodes::_invokestatic || op == Bytecodes::_invokedynamic) ? 0 : 1),
1315 "argc mismatch");
1316
1317 if (tailcall) {
1318 // Actually, in order to make these methods more recognizable,
1319 // let's put them in holder class MethodHandle. That way stack
1320 // walkers and compiler heuristics can recognize them.
1321 _target_klass = SystemDictionary::MethodHandle_klass();
1322 }
1323
1324 // Inline the method.
1325 InvocationCounter* ic = m->invocation_counter();
1326 ic->set_carry_flag();
1327
1328 for (int i = 0; i < argc; i++) {
1329 ArgToken arg = argv[i];
1330 TokenType tt = arg.token_type();
1331 BasicType bt = arg.basic_type();
1332
1333 switch (tt) {
1334 case tt_parameter:
1335 case tt_temporary:
1336 emit_load(bt, arg.index());
1337 break;
1338 case tt_constant:
1339 emit_load_constant(arg);
1340 break;
1341 case tt_illegal:
1342 // Sentinel.
1343 assert(i == (argc - 1), "sentinel must be last entry");
1344 break;
1345 case tt_void:
1346 default:
1347 ShouldNotReachHere();
1348 }
1349 }
1350
1351 // Populate constant pool.
1352 int name_index = cpool_symbol_put(name);
1353 int signature_index = cpool_symbol_put(signature);
1354 int name_and_type_index = cpool_name_and_type_put(name_index, signature_index);
1355 int klass_index = cpool_klass_put(klass);
1356 int methodref_index = cpool_methodref_put(klass_index, name_and_type_index);
1357
1358 // Generate invoke.
1359 switch (op) {
1360 case Bytecodes::_invokestatic:
1361 case Bytecodes::_invokespecial:
1362 case Bytecodes::_invokevirtual:
1363 emit_bc(op, methodref_index);
1364 break;
1365
1366 case Bytecodes::_invokeinterface: {
1367 ArgumentSizeComputer asc(signature);
1368 emit_bc(op, methodref_index, asc.size() + 1);
1369 break;
1370 }
1371
1372 default:
1373 ShouldNotReachHere();
1374 }
1375
1376 // If tailcall, we have walked all the way to a direct method handle.
1377 // Otherwise, make a recursive call to some helper routine.
1378 BasicType rbt = m->result_type();
1379 if (rbt == T_ARRAY) rbt = T_OBJECT;
1380 stack_push(rbt); // The return value is already pushed onto the stack.
1381 ArgToken ret;
1382 if (tailcall) {
1383 if (rbt != _rtype) {
1384 if (rbt == T_VOID) {
1385 // push a zero of the right sort
1386 if (_rtype == T_OBJECT) {
1387 zero = make_oop_constant(NULL, CHECK_(zero));
1388 } else {
1389 zero = make_prim_constant(_rtype, &zero_jvalue, CHECK_(zero));
1390 }
1391 emit_load_constant(zero);
1392 } else if (_rtype == T_VOID) {
1393 // We'll emit a _return with something on the stack.
1394 // It's OK to ignore what's on the stack.
1395 } else if (rbt == T_INT && is_subword_type(_rtype)) {
1396 // Convert value to match return type.
1397 switch (_rtype) {
1398 case T_BOOLEAN: {
1399 // boolean is treated as a one-bit unsigned integer.
1400 // Cf. API documentation: java/lang/invoke/MethodHandles.html#explicitCastArguments
1401 ArgToken one = make_prim_constant(T_INT, &one_jvalue, CHECK_(zero));
1402 emit_load_constant(one);
1403 emit_bc(Bytecodes::_iand);
1404 break;
1405 }
1406 case T_BYTE: emit_bc(Bytecodes::_i2b); break;
1407 case T_CHAR: emit_bc(Bytecodes::_i2c); break;
1408 case T_SHORT: emit_bc(Bytecodes::_i2s); break;
1409 default: ShouldNotReachHere();
1410 }
1411 } else if (is_subword_type(rbt) && (is_subword_type(_rtype) || (_rtype == T_INT))) {
1412 // The subword type was returned as an int and will be passed
1413 // on as an int.
1414 } else {
1415 lose("unknown conversion", CHECK_(zero));
1416 }
1417 }
1418 switch (_rtype) {
1419 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1420 case T_INT: emit_bc(Bytecodes::_ireturn); break;
1421 case T_LONG: emit_bc(Bytecodes::_lreturn); break;
1422 case T_FLOAT: emit_bc(Bytecodes::_freturn); break;
1423 case T_DOUBLE: emit_bc(Bytecodes::_dreturn); break;
1424 case T_VOID: emit_bc(Bytecodes::_return); break;
1425 case T_OBJECT:
1426 if (_rklass.not_null() && _rklass() != SystemDictionary::Object_klass() && !Klass::cast(_rklass())->is_interface()) {
1427 emit_bc(Bytecodes::_checkcast, cpool_klass_put(_rklass()));
1428 }
1429 emit_bc(Bytecodes::_areturn);
1430 break;
1431 default: ShouldNotReachHere();
1432 }
1433 ret = ArgToken(); // Dummy return value.
1434 }
1435 else {
1436 int index = new_local_index(rbt);
1437 switch (rbt) {
1438 case T_BOOLEAN: case T_BYTE: case T_CHAR: case T_SHORT:
1439 case T_INT: case T_LONG: case T_FLOAT: case T_DOUBLE:
1440 case T_OBJECT:
1441 emit_store(rbt, index);
1442 ret = ArgToken(tt_temporary, rbt, index);
1443 break;
1444 case T_VOID:
1445 ret = ArgToken(tt_void);
1446 break;
1447 default:
1448 ShouldNotReachHere();
1449 }
1450 }
1451
1452 return ret;
1453 }
1454
1455 MethodHandleWalker::ArgToken
1456 MethodHandleCompiler::make_fetch(BasicType type, klassOop tk, Bytecodes::Code op,
1457 const MethodHandleWalker::ArgToken& base,
1458 const MethodHandleWalker::ArgToken& offset,
1459 TRAPS) {
1460 switch (base.token_type()) {
1461 case tt_parameter:
1462 case tt_temporary:
1463 emit_load(base.basic_type(), base.index());
1464 break;
1465 case tt_constant:
1466 emit_load_constant(base);
1467 break;
1468 default:
1469 ShouldNotReachHere();
1470 }
1471 switch (offset.token_type()) {
1472 case tt_parameter:
1473 case tt_temporary:
1474 emit_load(offset.basic_type(), offset.index());
1475 break;
1476 case tt_constant:
1477 emit_load_constant(offset);
1478 break;
1479 default:
1480 ShouldNotReachHere();
1481 }
1482 emit_bc(op);
1483 int index = new_local_index(type);
1484 emit_store(type, index);
1485 return ArgToken(tt_temporary, type, index);
1486 }
1487
1488
1489 int MethodHandleCompiler::cpool_primitive_put(BasicType bt, jvalue* con) {
1490 jvalue con_copy;
1491 assert(bt < T_OBJECT, "");
1492 if (type2aelembytes(bt) < jintSize) {
1493 // widen to int
1494 con_copy = (*con);
1495 con = &con_copy;
1496 switch (bt) {
1497 case T_BOOLEAN: con->i = (con->z ? 1 : 0); break;
1498 case T_BYTE: con->i = con->b; break;
1499 case T_CHAR: con->i = con->c; break;
1500 case T_SHORT: con->i = con->s; break;
1501 default: ShouldNotReachHere();
1502 }
1503 bt = T_INT;
1504 }
1505
1506 // for (int i = 1, imax = _constants.length(); i < imax; i++) {
1507 // ConstantValue* con = _constants.at(i);
1508 // if (con != NULL && con->is_primitive() && con.basic_type() == bt) {
1509 // bool match = false;
1510 // switch (type2size[bt]) {
1511 // case 1: if (pcon->_value.i == con->i) match = true; break;
1512 // case 2: if (pcon->_value.j == con->j) match = true; break;
1513 // }
1514 // if (match)
1515 // return i;
1516 // }
1517 // }
1518 ConstantValue* cv = new ConstantValue(bt, *con);
1519 int index = _constants.append(cv);
1520
1521 // long and double entries take 2 slots, we add another empty entry.
1522 if (type2size[bt] == 2)
1523 (void) _constants.append(NULL);
1524
1525 return index;
1526 }
1527
1528
1529 constantPoolHandle MethodHandleCompiler::get_constant_pool(TRAPS) const {
1530 constantPoolHandle nullHandle;
1531 constantPoolOop cpool_oop = oopFactory::new_constantPool(_constants.length(),
1532 oopDesc::IsSafeConc,
1533 CHECK_(nullHandle));
1534 constantPoolHandle cpool(THREAD, cpool_oop);
1535
1536 // Fill the real constant pool skipping the zero element.
1537 for (int i = 1; i < _constants.length(); i++) {
1538 ConstantValue* cv = _constants.at(i);
1539 switch (cv->tag()) {
1540 case JVM_CONSTANT_Utf8: cpool->symbol_at_put( i, cv->symbol() ); break;
1541 case JVM_CONSTANT_Integer: cpool->int_at_put( i, cv->get_jint() ); break;
1542 case JVM_CONSTANT_Float: cpool->float_at_put( i, cv->get_jfloat() ); break;
1543 case JVM_CONSTANT_Long: cpool->long_at_put( i, cv->get_jlong() ); break;
1544 case JVM_CONSTANT_Double: cpool->double_at_put( i, cv->get_jdouble() ); break;
1545 case JVM_CONSTANT_Class: cpool->klass_at_put( i, cv->klass_oop() ); break;
1546 case JVM_CONSTANT_Methodref: cpool->method_at_put( i, cv->first_index(), cv->second_index()); break;
1547 case JVM_CONSTANT_NameAndType: cpool->name_and_type_at_put(i, cv->first_index(), cv->second_index()); break;
1548 case JVM_CONSTANT_Object: cpool->object_at_put( i, cv->object_oop() ); break;
1549 default: ShouldNotReachHere();
1550 }
1551
1552 switch (cv->tag()) {
1553 case JVM_CONSTANT_Long:
1554 case JVM_CONSTANT_Double:
1555 i++; // Skip empty entry.
1556 assert(_constants.at(i) == NULL, "empty entry");
1557 break;
1558 }
1559 }
1560
1561 // Set the constant pool holder to the target method's class.
1562 cpool->set_pool_holder(_target_klass());
1563
1564 return cpool;
1565 }
1566
1567
1568 methodHandle MethodHandleCompiler::get_method_oop(TRAPS) const {
1569 methodHandle empty;
1570 // Create a method that holds the generated bytecode. invokedynamic
1571 // has no receiver, normal MH calls do.
1572 int flags_bits;
1573 if (for_invokedynamic())
1574 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC | JVM_ACC_STATIC);
1575 else
1576 flags_bits = (/*JVM_MH_INVOKE_BITS |*/ JVM_ACC_PUBLIC | JVM_ACC_FINAL | JVM_ACC_SYNTHETIC);
1577
1578 // Create a new method
1579 methodHandle m;
1580 {
1581 methodOop m_oop = oopFactory::new_method(bytecode_length(),
1582 accessFlags_from(flags_bits),
1583 0, 0, 0, oopDesc::IsSafeConc, CHECK_(empty));
1584 m = methodHandle(THREAD, m_oop);
1585 }
1586
1587 constantPoolHandle cpool = get_constant_pool(CHECK_(empty));
1588 m->set_constants(cpool());
1589
1590 m->set_name_index(_name_index);
1591 m->set_signature_index(_signature_index);
1592
1593 m->set_code((address) bytecode());
1594
1595 m->set_max_stack(_max_stack);
1596 m->set_max_locals(max_locals());
1597 m->set_size_of_parameters(_num_params);
1598
1599 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1600 m->set_exception_table(exception_handlers());
1601
1602 // Rewrite the method and set up the constant pool cache.
1603 objArrayOop m_array = oopFactory::new_system_objArray(1, CHECK_(empty));
1604 objArrayHandle methods(THREAD, m_array);
1605 methods->obj_at_put(0, m());
1606 Rewriter::rewrite(_target_klass(), cpool, methods, CHECK_(empty)); // Use fake class.
1607
1608 // Set the invocation counter's count to the invoke count of the
1609 // original call site.
1610 InvocationCounter* ic = m->invocation_counter();
1611 ic->set(InvocationCounter::wait_for_compile, _invoke_count);
1612
1613 // Create a new MDO
1614 {
1615 methodDataOop mdo = oopFactory::new_methodData(m, CHECK_(empty));
1616 assert(m->method_data() == NULL, "there should not be an MDO yet");
1617 m->set_method_data(mdo);
1618
1619 // Iterate over all profile data and set the count of the counter
1620 // data entries to the original call site counter.
1621 for (ProfileData* profile_data = mdo->first_data();
1622 mdo->is_valid(profile_data);
1623 profile_data = mdo->next_data(profile_data)) {
1624 if (profile_data->is_CounterData()) {
1625 CounterData* counter_data = profile_data->as_CounterData();
1626 counter_data->set_count(_invoke_count);
1627 }
1628 }
1629 }
1630
1631 #ifndef PRODUCT
1632 if (TraceMethodHandles) {
1633 m->print();
1634 m->print_codes();
1635 }
1636 #endif //PRODUCT
1637
1638 assert(m->is_method_handle_adapter(), "must be recognized as an adapter");
1639 return m;
1640 }
1641
1642
1643 #ifndef PRODUCT
1644
1645 // MH printer for debugging.
1646
1647 class MethodHandlePrinter : public MethodHandleWalker {
1648 private:
1649 outputStream* _out;
1650 bool _verbose;
1651 int _temp_num;
1652 int _param_state;
1653 stringStream _strbuf;
1654 const char* strbuf() {
1655 const char* s = _strbuf.as_string();
1656 _strbuf.reset();
1657 return s;
1658 }
1659 ArgToken token(const char* str, BasicType type) {
1660 return ArgToken(str, type);
1661 }
1662 const char* string(ArgToken token) {
1663 return token.str();
1664 }
1665 void start_params() {
1666 _param_state <<= 1;
1667 _out->print("(");
1668 }
1669 void end_params() {
1670 if (_verbose) _out->print("\n");
1671 _out->print(") => {");
1672 _param_state >>= 1;
1673 }
1674 void put_type_name(BasicType type, klassOop tk, outputStream* s) {
1675 const char* kname = NULL;
1676 if (tk != NULL)
1677 kname = Klass::cast(tk)->external_name();
1678 s->print("%s", (kname != NULL) ? kname : type2name(type));
1679 }
1680 ArgToken maybe_make_temp(const char* statement_op, BasicType type, const char* temp_name) {
1681 const char* value = strbuf();
1682 if (!_verbose) return token(value, type);
1683 // make an explicit binding for each separate value
1684 _strbuf.print("%s%d", temp_name, ++_temp_num);
1685 const char* temp = strbuf();
1686 _out->print("\n %s %s %s = %s;", statement_op, type2name(type), temp, value);
1687 return token(temp, type);
1688 }
1689
1690 public:
1691 MethodHandlePrinter(Handle root, bool verbose, outputStream* out, TRAPS)
1692 : MethodHandleWalker(root, false, THREAD),
1693 _out(out),
1694 _verbose(verbose),
1695 _param_state(0),
1696 _temp_num(0)
1697 {
1698 start_params();
1699 }
1700 virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) {
1701 if (argnum < 0) {
1702 end_params();
1703 return token("return", type);
1704 }
1705 if ((_param_state & 1) == 0) {
1706 _param_state |= 1;
1707 _out->print(_verbose ? "\n " : "");
1708 } else {
1709 _out->print(_verbose ? ",\n " : ", ");
1710 }
1711 if (argnum >= _temp_num)
1712 _temp_num = argnum;
1713 // generate an argument name
1714 _strbuf.print("a%d", argnum);
1715 const char* arg = strbuf();
1716 put_type_name(type, tk, _out);
1717 _out->print(" %s", arg);
1718 return token(arg, type);
1719 }
1720 virtual ArgToken make_oop_constant(oop con, TRAPS) {
1721 if (con == NULL)
1722 _strbuf.print("null");
1723 else
1724 con->print_value_on(&_strbuf);
1725 if (_strbuf.size() == 0) { // yuck
1726 _strbuf.print("(a ");
1727 put_type_name(T_OBJECT, con->klass(), &_strbuf);
1728 _strbuf.print(")");
1729 }
1730 return maybe_make_temp("constant", T_OBJECT, "k");
1731 }
1732 virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) {
1733 java_lang_boxing_object::print(type, con, &_strbuf);
1734 return maybe_make_temp("constant", type, "k");
1735 }
1736 void print_bytecode_name(Bytecodes::Code op) {
1737 if (Bytecodes::is_defined(op))
1738 _strbuf.print("%s", Bytecodes::name(op));
1739 else
1740 _strbuf.print("bytecode_%d", (int) op);
1741 }
1742 virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS) {
1743 print_bytecode_name(op);
1744 _strbuf.print("(%s", string(src));
1745 if (tk != NULL) {
1746 _strbuf.print(", ");
1747 put_type_name(type, tk, &_strbuf);
1748 }
1749 _strbuf.print(")");
1750 return maybe_make_temp("convert", type, "v");
1751 }
1752 virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS) {
1753 _strbuf.print("%s(%s, %s", Bytecodes::name(op), string(base), string(offset));
1754 if (tk != NULL) {
1755 _strbuf.print(", ");
1756 put_type_name(type, tk, &_strbuf);
1757 }
1758 _strbuf.print(")");
1759 return maybe_make_temp("fetch", type, "x");
1760 }
1761 virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid,
1762 Bytecodes::Code op, bool tailcall,
1763 int argc, ArgToken* argv, TRAPS) {
1764 Symbol* name;
1765 Symbol* sig;
1766 if (m != NULL) {
1767 name = m->name();
1768 sig = m->signature();
1769 } else {
1770 name = vmSymbols::symbol_at(vmIntrinsics::name_for(iid));
1771 sig = vmSymbols::symbol_at(vmIntrinsics::signature_for(iid));
1772 }
1773 _strbuf.print("%s %s%s(", Bytecodes::name(op), name->as_C_string(), sig->as_C_string());
1774 for (int i = 0; i < argc; i++) {
1775 _strbuf.print("%s%s", (i > 0 ? ", " : ""), string(argv[i]));
1776 }
1777 _strbuf.print(")");
1778 if (!tailcall) {
1779 BasicType rt = char2type(sig->byte_at(sig->utf8_length()-1));
1780 if (rt == T_ILLEGAL) rt = T_OBJECT; // ';' at the end of '(...)L...;'
1781 return maybe_make_temp("invoke", rt, "x");
1782 } else {
1783 const char* ret = strbuf();
1784 _out->print(_verbose ? "\n return " : " ");
1785 _out->print("%s", ret);
1786 _out->print(_verbose ? "\n}\n" : " }");
1787 }
1788 return ArgToken();
1789 }
1790
1791 virtual void set_method_handle(oop mh) {
1792 if (WizardMode && Verbose) {
1793 tty->print("\n--- next target: ");
1794 mh->print();
1795 }
1796 }
1797
1798 static void print(Handle root, bool verbose, outputStream* out, TRAPS) {
1799 ResourceMark rm;
1800 MethodHandlePrinter printer(root, verbose, out, CHECK);
1801 printer.walk(CHECK);
1802 out->print("\n");
1803 }
1804 static void print(Handle root, bool verbose = Verbose, outputStream* out = tty) {
1805 Thread* THREAD = Thread::current();
1806 ResourceMark rm;
1807 MethodHandlePrinter printer(root, verbose, out, THREAD);
1808 if (!HAS_PENDING_EXCEPTION)
1809 printer.walk(THREAD);
1810 if (HAS_PENDING_EXCEPTION) {
1811 oop ex = PENDING_EXCEPTION;
1812 CLEAR_PENDING_EXCEPTION;
1813 out->print(" *** ");
1814 if (printer.lose_message() != NULL) out->print("%s ", printer.lose_message());
1815 out->print("}");
1816 }
1817 out->print("\n");
1818 }
1819 };
1820
1821 extern "C"
1822 void print_method_handle(oop mh) {
1823 if (!mh->is_oop()) {
1824 tty->print_cr("*** not a method handle: "PTR_FORMAT, (intptr_t)mh);
1825 } else if (java_lang_invoke_MethodHandle::is_instance(mh)) {
1826 MethodHandlePrinter::print(mh);
1827 } else {
1828 tty->print("*** not a method handle: ");
1829 mh->print();
1830 }
1831 }
1832
1833 #endif // PRODUCT