1 /*
2 * Copyright (c) 1999, 2017, 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 "ci/ciCallProfile.hpp"
27 #include "ci/ciExceptionHandler.hpp"
28 #include "ci/ciInstanceKlass.hpp"
29 #include "ci/ciMethod.hpp"
30 #include "ci/ciMethodBlocks.hpp"
31 #include "ci/ciMethodData.hpp"
32 #include "ci/ciStreams.hpp"
33 #include "ci/ciSymbol.hpp"
34 #include "ci/ciReplay.hpp"
35 #include "ci/ciUtilities.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/methodLiveness.hpp"
39 #include "interpreter/interpreter.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/oopMapCache.hpp"
42 #include "memory/allocation.inline.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "oops/generateOopMap.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "utilities/bitMap.inline.hpp"
49 #include "utilities/xmlstream.hpp"
50 #include "trace/tracing.hpp"
51 #ifdef COMPILER2
52 #include "ci/bcEscapeAnalyzer.hpp"
53 #include "ci/ciTypeFlow.hpp"
54 #include "oops/method.hpp"
55 #endif
56 #ifdef SHARK
57 #include "ci/ciTypeFlow.hpp"
58 #include "oops/method.hpp"
59 #endif
60
61 // ciMethod
62 //
63 // This class represents a Method* in the HotSpot virtual
64 // machine.
65
66
67 // ------------------------------------------------------------------
68 // ciMethod::ciMethod
69 //
70 // Loaded method.
71 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) :
72 ciMetadata(h_m()),
73 _holder(holder)
74 {
75 assert(h_m() != NULL, "no null method");
76
77 if (LogTouchedMethods) {
78 h_m()->log_touched(Thread::current());
79 }
80 // These fields are always filled in in loaded methods.
81 _flags = ciFlags(h_m()->access_flags());
82
83 // Easy to compute, so fill them in now.
84 _max_stack = h_m()->max_stack();
85 _max_locals = h_m()->max_locals();
86 _code_size = h_m()->code_size();
87 _intrinsic_id = h_m()->intrinsic_id();
88 _handler_count = h_m()->exception_table_length();
89 _size_of_parameters = h_m()->size_of_parameters();
90 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
91 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
92 _is_c1_compilable = !h_m()->is_not_c1_compilable();
93 _is_c2_compilable = !h_m()->is_not_c2_compilable();
94 _has_reserved_stack_access = h_m()->has_reserved_stack_access();
95 // Lazy fields, filled in on demand. Require allocation.
96 _code = NULL;
97 _exception_handlers = NULL;
98 _liveness = NULL;
99 _method_blocks = NULL;
100 #if defined(COMPILER2) || defined(SHARK)
101 _flow = NULL;
102 _bcea = NULL;
103 #endif // COMPILER2 || SHARK
104
105 ciEnv *env = CURRENT_ENV;
106 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
107 // 6328518 check hotswap conditions under the right lock.
108 MutexLocker locker(Compile_lock);
109 if (Dependencies::check_evol_method(h_m()) != NULL) {
110 _is_c1_compilable = false;
111 _is_c2_compilable = false;
112 }
113 } else {
114 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
115 }
116
117 if (h_m()->method_holder()->is_linked()) {
118 _can_be_statically_bound = h_m()->can_be_statically_bound();
119 } else {
120 // Have to use a conservative value in this case.
121 _can_be_statically_bound = false;
122 }
123
124 // Adjust the definition of this condition to be more useful:
125 // %%% take these conditions into account in vtable generation
126 if (!_can_be_statically_bound && h_m()->is_private())
127 _can_be_statically_bound = true;
128 if (_can_be_statically_bound && h_m()->is_abstract())
129 _can_be_statically_bound = false;
130
131 // generating _signature may allow GC and therefore move m.
132 // These fields are always filled in.
133 _name = env->get_symbol(h_m()->name());
134 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
135 constantPoolHandle cpool = h_m()->constants();
136 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
137 _method_data = NULL;
138 _nmethod_age = h_m()->nmethod_age();
139 // Take a snapshot of these values, so they will be commensurate with the MDO.
140 if (ProfileInterpreter || TieredCompilation) {
141 int invcnt = h_m()->interpreter_invocation_count();
142 // if the value overflowed report it as max int
143 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
144 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
145 } else {
146 _interpreter_invocation_count = 0;
147 _interpreter_throwout_count = 0;
148 }
149 if (_interpreter_invocation_count == 0)
150 _interpreter_invocation_count = 1;
151 _instructions_size = -1;
152 #ifdef ASSERT
153 if (ReplayCompiles) {
154 ciReplay::initialize(this);
155 }
156 #endif
157 }
158
159
160 // ------------------------------------------------------------------
161 // ciMethod::ciMethod
162 //
163 // Unloaded method.
164 ciMethod::ciMethod(ciInstanceKlass* holder,
165 ciSymbol* name,
166 ciSymbol* signature,
167 ciInstanceKlass* accessor) :
168 ciMetadata((Metadata*)NULL),
169 _name( name),
170 _holder( holder),
171 _intrinsic_id( vmIntrinsics::_none),
172 _liveness( NULL),
173 _can_be_statically_bound(false),
174 _method_blocks( NULL),
175 _method_data( NULL)
176 #if defined(COMPILER2) || defined(SHARK)
177 ,
178 _flow( NULL),
179 _bcea( NULL),
180 _instructions_size(-1)
181 #endif // COMPILER2 || SHARK
182 {
183 // Usually holder and accessor are the same type but in some cases
184 // the holder has the wrong class loader (e.g. invokedynamic call
185 // sites) so we pass the accessor.
186 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
187 }
188
189
190 // ------------------------------------------------------------------
191 // ciMethod::load_code
192 //
193 // Load the bytecodes and exception handler table for this method.
194 void ciMethod::load_code() {
195 VM_ENTRY_MARK;
196 assert(is_loaded(), "only loaded methods have code");
197
198 Method* me = get_Method();
199 Arena* arena = CURRENT_THREAD_ENV->arena();
200
201 // Load the bytecodes.
202 _code = (address)arena->Amalloc(code_size());
203 memcpy(_code, me->code_base(), code_size());
204
205 #if INCLUDE_JVMTI
206 // Revert any breakpoint bytecodes in ci's copy
207 if (me->number_of_breakpoints() > 0) {
208 BreakpointInfo* bp = me->method_holder()->breakpoints();
209 for (; bp != NULL; bp = bp->next()) {
210 if (bp->match(me)) {
211 code_at_put(bp->bci(), bp->orig_bytecode());
212 }
213 }
214 }
215 #endif
216
217 // And load the exception table.
218 ExceptionTable exc_table(me);
219
220 // Allocate one extra spot in our list of exceptions. This
221 // last entry will be used to represent the possibility that
222 // an exception escapes the method. See ciExceptionHandlerStream
223 // for details.
224 _exception_handlers =
225 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
226 * (_handler_count + 1));
227 if (_handler_count > 0) {
228 for (int i=0; i<_handler_count; i++) {
229 _exception_handlers[i] = new (arena) ciExceptionHandler(
230 holder(),
231 /* start */ exc_table.start_pc(i),
232 /* limit */ exc_table.end_pc(i),
233 /* goto pc */ exc_table.handler_pc(i),
234 /* cp index */ exc_table.catch_type_index(i));
235 }
236 }
237
238 // Put an entry at the end of our list to represent the possibility
239 // of exceptional exit.
240 _exception_handlers[_handler_count] =
241 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
242
243 if (CIPrintMethodCodes) {
244 print_codes();
245 }
246 }
247
248
249 // ------------------------------------------------------------------
250 // ciMethod::has_linenumber_table
251 //
252 // length unknown until decompression
253 bool ciMethod::has_linenumber_table() const {
254 check_is_loaded();
255 VM_ENTRY_MARK;
256 return get_Method()->has_linenumber_table();
257 }
258
259
260 // ------------------------------------------------------------------
261 // ciMethod::compressed_linenumber_table
262 u_char* ciMethod::compressed_linenumber_table() const {
263 check_is_loaded();
264 VM_ENTRY_MARK;
265 return get_Method()->compressed_linenumber_table();
266 }
267
268
269 // ------------------------------------------------------------------
270 // ciMethod::line_number_from_bci
271 int ciMethod::line_number_from_bci(int bci) const {
272 check_is_loaded();
273 VM_ENTRY_MARK;
274 return get_Method()->line_number_from_bci(bci);
275 }
276
277
278 // ------------------------------------------------------------------
279 // ciMethod::vtable_index
280 //
281 // Get the position of this method's entry in the vtable, if any.
282 int ciMethod::vtable_index() {
283 check_is_loaded();
284 assert(holder()->is_linked(), "must be linked");
285 VM_ENTRY_MARK;
286 return get_Method()->vtable_index();
287 }
288
289
290 #ifdef SHARK
291 // ------------------------------------------------------------------
292 // ciMethod::itable_index
293 //
294 // Get the position of this method's entry in the itable, if any.
295 int ciMethod::itable_index() {
296 check_is_loaded();
297 assert(holder()->is_linked(), "must be linked");
298 VM_ENTRY_MARK;
299 Method* m = get_Method();
300 if (!m->has_itable_index())
301 return Method::nonvirtual_vtable_index;
302 return m->itable_index();
303 }
304 #endif // SHARK
305
306
307 // ------------------------------------------------------------------
308 // ciMethod::native_entry
309 //
310 // Get the address of this method's native code, if any.
311 address ciMethod::native_entry() {
312 check_is_loaded();
313 assert(flags().is_native(), "must be native method");
314 VM_ENTRY_MARK;
315 Method* method = get_Method();
316 address entry = method->native_function();
317 assert(entry != NULL, "must be valid entry point");
318 return entry;
319 }
320
321
322 // ------------------------------------------------------------------
323 // ciMethod::interpreter_entry
324 //
325 // Get the entry point for running this method in the interpreter.
326 address ciMethod::interpreter_entry() {
327 check_is_loaded();
328 VM_ENTRY_MARK;
329 methodHandle mh(THREAD, get_Method());
330 return Interpreter::entry_for_method(mh);
331 }
332
333
334 // ------------------------------------------------------------------
335 // ciMethod::uses_balanced_monitors
336 //
337 // Does this method use monitors in a strict stack-disciplined manner?
338 bool ciMethod::has_balanced_monitors() {
339 check_is_loaded();
340 if (_balanced_monitors) return true;
341
342 // Analyze the method to see if monitors are used properly.
343 VM_ENTRY_MARK;
344 methodHandle method(THREAD, get_Method());
345 assert(method->has_monitor_bytecodes(), "should have checked this");
346
347 // Check to see if a previous compilation computed the
348 // monitor-matching analysis.
349 if (method->guaranteed_monitor_matching()) {
350 _balanced_monitors = true;
351 return true;
352 }
353
354 {
355 EXCEPTION_MARK;
356 ResourceMark rm(THREAD);
357 GeneratePairingInfo gpi(method);
358 gpi.compute_map(CATCH);
359 if (!gpi.monitor_safe()) {
360 return false;
361 }
362 method->set_guaranteed_monitor_matching();
363 _balanced_monitors = true;
364 }
365 return true;
366 }
367
368
369 // ------------------------------------------------------------------
370 // ciMethod::get_flow_analysis
371 ciTypeFlow* ciMethod::get_flow_analysis() {
372 #if defined(COMPILER2) || defined(SHARK)
373 if (_flow == NULL) {
374 ciEnv* env = CURRENT_ENV;
375 _flow = new (env->arena()) ciTypeFlow(env, this);
376 _flow->do_flow();
377 }
378 return _flow;
379 #else // COMPILER2 || SHARK
380 ShouldNotReachHere();
381 return NULL;
382 #endif // COMPILER2 || SHARK
383 }
384
385
386 // ------------------------------------------------------------------
387 // ciMethod::get_osr_flow_analysis
388 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
389 #if defined(COMPILER2) || defined(SHARK)
390 // OSR entry points are always place after a call bytecode of some sort
391 assert(osr_bci >= 0, "must supply valid OSR entry point");
392 ciEnv* env = CURRENT_ENV;
393 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
394 flow->do_flow();
395 return flow;
396 #else // COMPILER2 || SHARK
397 ShouldNotReachHere();
398 return NULL;
399 #endif // COMPILER2 || SHARK
400 }
401
402 // ------------------------------------------------------------------
403 // ciMethod::raw_liveness_at_bci
404 //
405 // Which local variables are live at a specific bci?
406 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
407 check_is_loaded();
408 if (_liveness == NULL) {
409 // Create the liveness analyzer.
410 Arena* arena = CURRENT_ENV->arena();
411 _liveness = new (arena) MethodLiveness(arena, this);
412 _liveness->compute_liveness();
413 }
414 return _liveness->get_liveness_at(bci);
415 }
416
417 // ------------------------------------------------------------------
418 // ciMethod::liveness_at_bci
419 //
420 // Which local variables are live at a specific bci? When debugging
421 // will return true for all locals in some cases to improve debug
422 // information.
423 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
424 MethodLivenessResult result = raw_liveness_at_bci(bci);
425 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
426 // Keep all locals live for the user's edification and amusement.
427 result.at_put_range(0, result.size(), true);
428 }
429 return result;
430 }
431
432 // ciMethod::live_local_oops_at_bci
433 //
434 // find all the live oops in the locals array for a particular bci
435 // Compute what the interpreter believes by using the interpreter
436 // oopmap generator. This is used as a double check during osr to
437 // guard against conservative result from MethodLiveness making us
438 // think a dead oop is live. MethodLiveness is conservative in the
439 // sense that it may consider locals to be live which cannot be live,
440 // like in the case where a local could contain an oop or a primitive
441 // along different paths. In that case the local must be dead when
442 // those paths merge. Since the interpreter's viewpoint is used when
443 // gc'ing an interpreter frame we need to use its viewpoint during
444 // OSR when loading the locals.
445
446 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
447 VM_ENTRY_MARK;
448 InterpreterOopMap mask;
449 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
450 int mask_size = max_locals();
451 ResourceBitMap result(mask_size);
452 int i;
453 for (i = 0; i < mask_size ; i++ ) {
454 if (mask.is_oop(i)) result.set_bit(i);
455 }
456 return result;
457 }
458
459
460 #ifdef COMPILER1
461 // ------------------------------------------------------------------
462 // ciMethod::bci_block_start
463 //
464 // Marks all bcis where a new basic block starts
465 const BitMap& ciMethod::bci_block_start() {
466 check_is_loaded();
467 if (_liveness == NULL) {
468 // Create the liveness analyzer.
469 Arena* arena = CURRENT_ENV->arena();
470 _liveness = new (arena) MethodLiveness(arena, this);
471 _liveness->compute_liveness();
472 }
473
474 return _liveness->get_bci_block_start();
475 }
476 #endif // COMPILER1
477
478
479 // ------------------------------------------------------------------
480 // ciMethod::call_profile_at_bci
481 //
482 // Get the ciCallProfile for the invocation of this method.
483 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
484 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
485 ResourceMark rm;
486 ciCallProfile result;
487 if (method_data() != NULL && method_data()->is_mature()) {
488 ciProfileData* data = method_data()->bci_to_data(bci);
489 if (data != NULL && data->is_CounterData()) {
490 // Every profiled call site has a counter.
491 int count = data->as_CounterData()->count();
492
493 if (!data->is_ReceiverTypeData()) {
494 result._receiver_count[0] = 0; // that's a definite zero
495 } else { // ReceiverTypeData is a subclass of CounterData
496 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
497 // In addition, virtual call sites have receiver type information
498 int receivers_count_total = 0;
499 int morphism = 0;
500 // Precompute morphism for the possible fixup
501 for (uint i = 0; i < call->row_limit(); i++) {
502 ciKlass* receiver = call->receiver(i);
503 if (receiver == NULL) continue;
504 morphism++;
505 }
506 int epsilon = 0;
507 if (TieredCompilation) {
508 // For a call, it is assumed that either the type of the receiver(s)
509 // is recorded or an associated counter is incremented, but not both. With
510 // tiered compilation, however, both can happen due to the interpreter and
511 // C1 profiling invocations differently. Address that inconsistency here.
512 if (morphism == 1 && count > 0) {
513 epsilon = count;
514 count = 0;
515 }
516 }
517 for (uint i = 0; i < call->row_limit(); i++) {
518 ciKlass* receiver = call->receiver(i);
519 if (receiver == NULL) continue;
520 int rcount = call->receiver_count(i) + epsilon;
521 if (rcount == 0) rcount = 1; // Should be valid value
522 receivers_count_total += rcount;
523 // Add the receiver to result data.
524 result.add_receiver(receiver, rcount);
525 // If we extend profiling to record methods,
526 // we will set result._method also.
527 }
528 // Determine call site's morphism.
529 // The call site count is 0 with known morphism (only 1 or 2 receivers)
530 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
531 // The call site count is > 0 in the case of a polymorphic virtual call.
532 if (morphism > 0 && morphism == result._limit) {
533 // The morphism <= MorphismLimit.
534 if ((morphism < ciCallProfile::MorphismLimit) ||
535 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
536 #ifdef ASSERT
537 if (count > 0) {
538 this->print_short_name(tty);
539 tty->print_cr(" @ bci:%d", bci);
540 this->print_codes();
541 assert(false, "this call site should not be polymorphic");
542 }
543 #endif
544 result._morphism = morphism;
545 }
546 }
547 // Make the count consistent if this is a call profile. If count is
548 // zero or less, presume that this is a typecheck profile and
549 // do nothing. Otherwise, increase count to be the sum of all
550 // receiver's counts.
551 if (count >= 0) {
552 count += receivers_count_total;
553 }
554 }
555 result._count = count;
556 }
557 }
558 return result;
559 }
560
561 // ------------------------------------------------------------------
562 // Add new receiver and sort data by receiver's profile count.
563 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
564 // Add new receiver and sort data by receiver's counts when we have space
565 // for it otherwise replace the less called receiver (less called receiver
566 // is placed to the last array element which is not used).
567 // First array's element contains most called receiver.
568 int i = _limit;
569 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
570 _receiver[i] = _receiver[i-1];
571 _receiver_count[i] = _receiver_count[i-1];
572 }
573 _receiver[i] = receiver;
574 _receiver_count[i] = receiver_count;
575 if (_limit < MorphismLimit) _limit++;
576 }
577
578
579 void ciMethod::assert_virtual_call_type_ok(int bci) {
580 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
581 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
582 }
583
584 void ciMethod::assert_call_type_ok(int bci) {
585 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
586 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
587 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
588 }
589
590 /**
591 * Check whether profiling provides a type for the argument i to the
592 * call at bci bci
593 *
594 * @param [in]bci bci of the call
595 * @param [in]i argument number
596 * @param [out]type profiled type of argument, NULL if none
597 * @param [out]maybe_null true if null was seen for argument
598 * @return true if profiling exists
599 *
600 */
601 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) {
602 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
603 ciProfileData* data = method_data()->bci_to_data(bci);
604 if (data != NULL) {
605 if (data->is_VirtualCallTypeData()) {
606 assert_virtual_call_type_ok(bci);
607 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
608 if (i >= call->number_of_arguments()) {
609 return false;
610 }
611 type = call->valid_argument_type(i);
612 maybe_null = call->argument_maybe_null(i);
613 return true;
614 } else if (data->is_CallTypeData()) {
615 assert_call_type_ok(bci);
616 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
617 if (i >= call->number_of_arguments()) {
618 return false;
619 }
620 type = call->valid_argument_type(i);
621 maybe_null = call->argument_maybe_null(i);
622 return true;
623 }
624 }
625 }
626 return false;
627 }
628
629 /**
630 * Check whether profiling provides a type for the return value from
631 * the call at bci bci
632 *
633 * @param [in]bci bci of the call
634 * @param [out]type profiled type of argument, NULL if none
635 * @param [out]maybe_null true if null was seen for argument
636 * @return true if profiling exists
637 *
638 */
639 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
640 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
641 ciProfileData* data = method_data()->bci_to_data(bci);
642 if (data != NULL) {
643 if (data->is_VirtualCallTypeData()) {
644 assert_virtual_call_type_ok(bci);
645 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
646 type = call->valid_return_type();
647 maybe_null = call->return_maybe_null();
648 return true;
649 } else if (data->is_CallTypeData()) {
650 assert_call_type_ok(bci);
651 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
652 type = call->valid_return_type();
653 maybe_null = call->return_maybe_null();
654 return true;
655 }
656 }
657 }
658 return false;
659 }
660
661 /**
662 * Check whether profiling provides a type for the parameter i
663 *
664 * @param [in]i parameter number
665 * @param [out]type profiled type of parameter, NULL if none
666 * @param [out]maybe_null true if null was seen for parameter
667 * @return true if profiling exists
668 *
669 */
670 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
671 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
672 ciParametersTypeData* parameters = method_data()->parameters_type_data();
673 if (parameters != NULL && i < parameters->number_of_parameters()) {
674 type = parameters->valid_parameter_type(i);
675 maybe_null = parameters->parameter_maybe_null(i);
676 return true;
677 }
678 }
679 return false;
680 }
681
682
683 // ------------------------------------------------------------------
684 // ciMethod::find_monomorphic_target
685 //
686 // Given a certain calling environment, find the monomorphic target
687 // for the call. Return NULL if the call is not monomorphic in
688 // its calling environment, or if there are only abstract methods.
689 // The returned method is never abstract.
690 // Note: If caller uses a non-null result, it must inform dependencies
691 // via assert_unique_concrete_method or assert_leaf_type.
692 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
693 ciInstanceKlass* callee_holder,
694 ciInstanceKlass* actual_recv,
695 bool check_access) {
696 check_is_loaded();
697
698 if (actual_recv->is_interface()) {
699 // %%% We cannot trust interface types, yet. See bug 6312651.
700 return NULL;
701 }
702
703 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
704 if (root_m == NULL) {
705 // Something went wrong looking up the actual receiver method.
706 return NULL;
707 }
708 assert(!root_m->is_abstract(), "resolve_invoke promise");
709
710 // Make certain quick checks even if UseCHA is false.
711
712 // Is it private or final?
713 if (root_m->can_be_statically_bound()) {
714 return root_m;
715 }
716
717 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
718 // Easy case. There is no other place to put a method, so don't bother
719 // to go through the VM_ENTRY_MARK and all the rest.
720 return root_m;
721 }
722
723 // Array methods (clone, hashCode, etc.) are always statically bound.
724 // If we were to see an array type here, we'd return root_m.
725 // However, this method processes only ciInstanceKlasses. (See 4962591.)
726 // The inline_native_clone intrinsic narrows Object to T[] properly,
727 // so there is no need to do the same job here.
728
729 if (!UseCHA) return NULL;
730
731 VM_ENTRY_MARK;
732
733 // Disable CHA for default methods for now
734 if (root_m->get_Method()->is_default_method()) {
735 return NULL;
736 }
737
738 methodHandle target;
739 {
740 MutexLocker locker(Compile_lock);
741 Klass* context = actual_recv->get_Klass();
742 target = Dependencies::find_unique_concrete_method(context,
743 root_m->get_Method());
744 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
745 }
746
747 #ifndef PRODUCT
748 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
749 tty->print("found a non-root unique target method");
750 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
751 tty->print(" method = ");
752 target->print_short_name(tty);
753 tty->cr();
754 }
755 #endif //PRODUCT
756
757 if (target() == NULL) {
758 return NULL;
759 }
760 if (target() == root_m->get_Method()) {
761 return root_m;
762 }
763 if (!root_m->is_public() &&
764 !root_m->is_protected()) {
765 // If we are going to reason about inheritance, it's easiest
766 // if the method in question is public, protected, or private.
767 // If the answer is not root_m, it is conservatively correct
768 // to return NULL, even if the CHA encountered irrelevant
769 // methods in other packages.
770 // %%% TO DO: Work out logic for package-private methods
771 // with the same name but different vtable indexes.
772 return NULL;
773 }
774 return CURRENT_THREAD_ENV->get_method(target());
775 }
776
777 // ------------------------------------------------------------------
778 // ciMethod::resolve_invoke
779 //
780 // Given a known receiver klass, find the target for the call.
781 // Return NULL if the call has no target or the target is abstract.
782 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
783 check_is_loaded();
784 VM_ENTRY_MARK;
785
786 Klass* caller_klass = caller->get_Klass();
787 Klass* recv = exact_receiver->get_Klass();
788 Klass* resolved = holder()->get_Klass();
789 Symbol* h_name = name()->get_symbol();
790 Symbol* h_signature = signature()->get_symbol();
791
792 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
793 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
794 methodHandle m;
795 // Only do exact lookup if receiver klass has been linked. Otherwise,
796 // the vtable has not been setup, and the LinkResolver will fail.
797 if (recv->is_array_klass()
798 ||
799 InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface()) {
800 if (holder()->is_interface()) {
801 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
802 } else {
803 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
804 }
805 }
806
807 if (m.is_null()) {
808 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
809 return NULL;
810 }
811
812 ciMethod* result = this;
813 if (m() != get_Method()) {
814 result = CURRENT_THREAD_ENV->get_method(m());
815 }
816
817 // Don't return abstract methods because they aren't
818 // optimizable or interesting.
819 if (result->is_abstract()) {
820 return NULL;
821 } else {
822 return result;
823 }
824 }
825
826 // ------------------------------------------------------------------
827 // ciMethod::resolve_vtable_index
828 //
829 // Given a known receiver klass, find the vtable index for the call.
830 // Return Method::invalid_vtable_index if the vtable_index is unknown.
831 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
832 check_is_loaded();
833
834 int vtable_index = Method::invalid_vtable_index;
835 // Only do lookup if receiver klass has been linked. Otherwise,
836 // the vtable has not been setup, and the LinkResolver will fail.
837 if (!receiver->is_interface()
838 && (!receiver->is_instance_klass() ||
839 receiver->as_instance_klass()->is_linked())) {
840 VM_ENTRY_MARK;
841
842 Klass* caller_klass = caller->get_Klass();
843 Klass* recv = receiver->get_Klass();
844 Symbol* h_name = name()->get_symbol();
845 Symbol* h_signature = signature()->get_symbol();
846
847 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
848 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
849 if (vtable_index == Method::nonvirtual_vtable_index) {
850 // A statically bound method. Return "no such index".
851 vtable_index = Method::invalid_vtable_index;
852 }
853 }
854
855 return vtable_index;
856 }
857
858 // ------------------------------------------------------------------
859 // ciMethod::interpreter_call_site_count
860 int ciMethod::interpreter_call_site_count(int bci) {
861 if (method_data() != NULL) {
862 ResourceMark rm;
863 ciProfileData* data = method_data()->bci_to_data(bci);
864 if (data != NULL && data->is_CounterData()) {
865 return scale_count(data->as_CounterData()->count());
866 }
867 }
868 return -1; // unknown
869 }
870
871 // ------------------------------------------------------------------
872 // ciMethod::get_field_at_bci
873 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
874 ciBytecodeStream iter(this);
875 iter.reset_to_bci(bci);
876 iter.next();
877 return iter.get_field(will_link);
878 }
879
880 // ------------------------------------------------------------------
881 // ciMethod::get_method_at_bci
882 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
883 ciBytecodeStream iter(this);
884 iter.reset_to_bci(bci);
885 iter.next();
886 return iter.get_method(will_link, declared_signature);
887 }
888
889 // ------------------------------------------------------------------
890 // Adjust a CounterData count to be commensurate with
891 // interpreter_invocation_count. If the MDO exists for
892 // only 25% of the time the method exists, then the
893 // counts in the MDO should be scaled by 4X, so that
894 // they can be usefully and stably compared against the
895 // invocation counts in methods.
896 int ciMethod::scale_count(int count, float prof_factor) {
897 if (count > 0 && method_data() != NULL) {
898 int counter_life;
899 int method_life = interpreter_invocation_count();
900 if (TieredCompilation) {
901 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
902 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
903 } else {
904 int current_mileage = method_data()->current_mileage();
905 int creation_mileage = method_data()->creation_mileage();
906 counter_life = current_mileage - creation_mileage;
907 }
908
909 // counter_life due to backedge_counter could be > method_life
910 if (counter_life > method_life)
911 counter_life = method_life;
912 if (0 < counter_life && counter_life <= method_life) {
913 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
914 count = (count > 0) ? count : 1;
915 }
916 }
917 return count;
918 }
919
920
921 // ------------------------------------------------------------------
922 // ciMethod::is_special_get_caller_class_method
923 //
924 bool ciMethod::is_ignored_by_security_stack_walk() const {
925 check_is_loaded();
926 VM_ENTRY_MARK;
927 return get_Method()->is_ignored_by_security_stack_walk();
928 }
929
930
931 // ------------------------------------------------------------------
932 // invokedynamic support
933
934 // ------------------------------------------------------------------
935 // ciMethod::is_method_handle_intrinsic
936 //
937 // Return true if the method is an instance of the JVM-generated
938 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
939 bool ciMethod::is_method_handle_intrinsic() const {
940 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
941 return (MethodHandles::is_signature_polymorphic(iid) &&
942 MethodHandles::is_signature_polymorphic_intrinsic(iid));
943 }
944
945 // ------------------------------------------------------------------
946 // ciMethod::is_compiled_lambda_form
947 //
948 // Return true if the method is a generated MethodHandle adapter.
949 // These are built by Java code.
950 bool ciMethod::is_compiled_lambda_form() const {
951 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
952 return iid == vmIntrinsics::_compiledLambdaForm;
953 }
954
955 // ------------------------------------------------------------------
956 // ciMethod::is_object_initializer
957 //
958 bool ciMethod::is_object_initializer() const {
959 return name() == ciSymbol::object_initializer_name();
960 }
961
962 // ------------------------------------------------------------------
963 // ciMethod::has_member_arg
964 //
965 // Return true if the method is a linker intrinsic like _linkToVirtual.
966 // These are built by the JVM.
967 bool ciMethod::has_member_arg() const {
968 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
969 return (MethodHandles::is_signature_polymorphic(iid) &&
970 MethodHandles::has_member_arg(iid));
971 }
972
973 // ------------------------------------------------------------------
974 // ciMethod::ensure_method_data
975 //
976 // Generate new MethodData* objects at compile time.
977 // Return true if allocation was successful or no MDO is required.
978 bool ciMethod::ensure_method_data(methodHandle h_m) {
979 EXCEPTION_CONTEXT;
980 if (is_native() || is_abstract() || h_m()->is_accessor()) {
981 return true;
982 }
983 if (h_m()->method_data() == NULL) {
984 Method::build_interpreter_method_data(h_m, THREAD);
985 if (HAS_PENDING_EXCEPTION) {
986 CLEAR_PENDING_EXCEPTION;
987 }
988 }
989 if (h_m()->method_data() != NULL) {
990 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
991 _method_data->load_data();
992 return true;
993 } else {
994 _method_data = CURRENT_ENV->get_empty_methodData();
995 return false;
996 }
997 }
998
999 // public, retroactive version
1000 bool ciMethod::ensure_method_data() {
1001 bool result = true;
1002 if (_method_data == NULL || _method_data->is_empty()) {
1003 GUARDED_VM_ENTRY({
1004 result = ensure_method_data(get_Method());
1005 });
1006 }
1007 return result;
1008 }
1009
1010
1011 // ------------------------------------------------------------------
1012 // ciMethod::method_data
1013 //
1014 ciMethodData* ciMethod::method_data() {
1015 if (_method_data != NULL) {
1016 return _method_data;
1017 }
1018 VM_ENTRY_MARK;
1019 ciEnv* env = CURRENT_ENV;
1020 Thread* my_thread = JavaThread::current();
1021 methodHandle h_m(my_thread, get_Method());
1022
1023 if (h_m()->method_data() != NULL) {
1024 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1025 _method_data->load_data();
1026 } else {
1027 _method_data = CURRENT_ENV->get_empty_methodData();
1028 }
1029 return _method_data;
1030
1031 }
1032
1033 // ------------------------------------------------------------------
1034 // ciMethod::method_data_or_null
1035 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1036 // NULL otherwise.
1037 ciMethodData* ciMethod::method_data_or_null() {
1038 ciMethodData *md = method_data();
1039 if (md->is_empty()) {
1040 return NULL;
1041 }
1042 return md;
1043 }
1044
1045 // ------------------------------------------------------------------
1046 // ciMethod::ensure_method_counters
1047 //
1048 MethodCounters* ciMethod::ensure_method_counters() {
1049 check_is_loaded();
1050 VM_ENTRY_MARK;
1051 methodHandle mh(THREAD, get_Method());
1052 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1053 return method_counters;
1054 }
1055
1056 // ------------------------------------------------------------------
1057 // ciMethod::has_option
1058 //
1059 bool ciMethod::has_option(const char* option) {
1060 check_is_loaded();
1061 VM_ENTRY_MARK;
1062 methodHandle mh(THREAD, get_Method());
1063 return CompilerOracle::has_option_string(mh, option);
1064 }
1065
1066 // ------------------------------------------------------------------
1067 // ciMethod::has_option_value
1068 //
1069 bool ciMethod::has_option_value(const char* option, double& value) {
1070 check_is_loaded();
1071 VM_ENTRY_MARK;
1072 methodHandle mh(THREAD, get_Method());
1073 return CompilerOracle::has_option_value(mh, option, value);
1074 }
1075 // ------------------------------------------------------------------
1076 // ciMethod::can_be_compiled
1077 //
1078 // Have previous compilations of this method succeeded?
1079 bool ciMethod::can_be_compiled() {
1080 check_is_loaded();
1081 ciEnv* env = CURRENT_ENV;
1082 if (is_c1_compile(env->comp_level())) {
1083 return _is_c1_compilable;
1084 }
1085 return _is_c2_compilable;
1086 }
1087
1088 // ------------------------------------------------------------------
1089 // ciMethod::set_not_compilable
1090 //
1091 // Tell the VM that this method cannot be compiled at all.
1092 void ciMethod::set_not_compilable(const char* reason) {
1093 check_is_loaded();
1094 VM_ENTRY_MARK;
1095 ciEnv* env = CURRENT_ENV;
1096 if (is_c1_compile(env->comp_level())) {
1097 _is_c1_compilable = false;
1098 } else {
1099 _is_c2_compilable = false;
1100 }
1101 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1102 }
1103
1104 // ------------------------------------------------------------------
1105 // ciMethod::can_be_osr_compiled
1106 //
1107 // Have previous compilations of this method succeeded?
1108 //
1109 // Implementation note: the VM does not currently keep track
1110 // of failed OSR compilations per bci. The entry_bci parameter
1111 // is currently unused.
1112 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1113 check_is_loaded();
1114 VM_ENTRY_MARK;
1115 ciEnv* env = CURRENT_ENV;
1116 return !get_Method()->is_not_osr_compilable(env->comp_level());
1117 }
1118
1119 // ------------------------------------------------------------------
1120 // ciMethod::has_compiled_code
1121 bool ciMethod::has_compiled_code() {
1122 return instructions_size() > 0;
1123 }
1124
1125 int ciMethod::comp_level() {
1126 check_is_loaded();
1127 VM_ENTRY_MARK;
1128 CompiledMethod* nm = get_Method()->code();
1129 if (nm != NULL) return nm->comp_level();
1130 return 0;
1131 }
1132
1133 int ciMethod::highest_osr_comp_level() {
1134 check_is_loaded();
1135 VM_ENTRY_MARK;
1136 return get_Method()->highest_osr_comp_level();
1137 }
1138
1139 // ------------------------------------------------------------------
1140 // ciMethod::code_size_for_inlining
1141 //
1142 // Code size for inlining decisions. This method returns a code
1143 // size of 1 for methods which has the ForceInline annotation.
1144 int ciMethod::code_size_for_inlining() {
1145 check_is_loaded();
1146 if (get_Method()->force_inline()) {
1147 return 1;
1148 }
1149 return code_size();
1150 }
1151
1152 // ------------------------------------------------------------------
1153 // ciMethod::instructions_size
1154 //
1155 // This is a rough metric for "fat" methods, compared before inlining
1156 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1157 // junk like exception handler, stubs, and constant table, which are
1158 // not highly relevant to an inlined method. So we use the more
1159 // specific accessor nmethod::insts_size.
1160 int ciMethod::instructions_size() {
1161 if (_instructions_size == -1) {
1162 GUARDED_VM_ENTRY(
1163 CompiledMethod* code = get_Method()->code();
1164 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1165 _instructions_size = code->insts_end() - code->verified_entry_point();
1166 } else {
1167 _instructions_size = 0;
1168 }
1169 );
1170 }
1171 return _instructions_size;
1172 }
1173
1174 // ------------------------------------------------------------------
1175 // ciMethod::log_nmethod_identity
1176 void ciMethod::log_nmethod_identity(xmlStream* log) {
1177 GUARDED_VM_ENTRY(
1178 CompiledMethod* code = get_Method()->code();
1179 if (code != NULL) {
1180 code->log_identity(log);
1181 }
1182 )
1183 }
1184
1185 // ------------------------------------------------------------------
1186 // ciMethod::is_not_reached
1187 bool ciMethod::is_not_reached(int bci) {
1188 check_is_loaded();
1189 VM_ENTRY_MARK;
1190 return Interpreter::is_not_reached(
1191 methodHandle(THREAD, get_Method()), bci);
1192 }
1193
1194 // ------------------------------------------------------------------
1195 // ciMethod::was_never_executed
1196 bool ciMethod::was_executed_more_than(int times) {
1197 VM_ENTRY_MARK;
1198 return get_Method()->was_executed_more_than(times);
1199 }
1200
1201 // ------------------------------------------------------------------
1202 // ciMethod::has_unloaded_classes_in_signature
1203 bool ciMethod::has_unloaded_classes_in_signature() {
1204 VM_ENTRY_MARK;
1205 {
1206 EXCEPTION_MARK;
1207 methodHandle m(THREAD, get_Method());
1208 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1209 if( HAS_PENDING_EXCEPTION ) {
1210 CLEAR_PENDING_EXCEPTION;
1211 return true; // Declare that we may have unloaded classes
1212 }
1213 return has_unloaded;
1214 }
1215 }
1216
1217 // ------------------------------------------------------------------
1218 // ciMethod::is_klass_loaded
1219 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1220 VM_ENTRY_MARK;
1221 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1222 }
1223
1224 // ------------------------------------------------------------------
1225 // ciMethod::check_call
1226 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1227 // This method is used only in C2 from InlineTree::ok_to_inline,
1228 // and is only used under -Xcomp or -XX:CompileTheWorld.
1229 // It appears to fail when applied to an invokeinterface call site.
1230 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1231 VM_ENTRY_MARK;
1232 {
1233 EXCEPTION_MARK;
1234 HandleMark hm(THREAD);
1235 constantPoolHandle pool (THREAD, get_Method()->constants());
1236 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1237 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1238 if (HAS_PENDING_EXCEPTION) {
1239 CLEAR_PENDING_EXCEPTION;
1240 return false;
1241 } else {
1242 return (spec_method->is_static() == is_static);
1243 }
1244 }
1245 return false;
1246 }
1247
1248 // ------------------------------------------------------------------
1249 // ciMethod::profile_aging
1250 //
1251 // Should the method be compiled with an age counter?
1252 bool ciMethod::profile_aging() const {
1253 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1254 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1255 }
1256 // ------------------------------------------------------------------
1257 // ciMethod::print_codes
1258 //
1259 // Print the bytecodes for this method.
1260 void ciMethod::print_codes_on(outputStream* st) {
1261 check_is_loaded();
1262 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1263 }
1264
1265
1266 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1267 check_is_loaded(); \
1268 VM_ENTRY_MARK; \
1269 return get_Method()->flag_accessor(); \
1270 }
1271
1272 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1273 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1274 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1275 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1276 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1277 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1278 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1279 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1280
1281 bool ciMethod::is_boxing_method() const {
1282 if (holder()->is_box_klass()) {
1283 switch (intrinsic_id()) {
1284 case vmIntrinsics::_Boolean_valueOf:
1285 case vmIntrinsics::_Byte_valueOf:
1286 case vmIntrinsics::_Character_valueOf:
1287 case vmIntrinsics::_Short_valueOf:
1288 case vmIntrinsics::_Integer_valueOf:
1289 case vmIntrinsics::_Long_valueOf:
1290 case vmIntrinsics::_Float_valueOf:
1291 case vmIntrinsics::_Double_valueOf:
1292 return true;
1293 default:
1294 return false;
1295 }
1296 }
1297 return false;
1298 }
1299
1300 bool ciMethod::is_unboxing_method() const {
1301 if (holder()->is_box_klass()) {
1302 switch (intrinsic_id()) {
1303 case vmIntrinsics::_booleanValue:
1304 case vmIntrinsics::_byteValue:
1305 case vmIntrinsics::_charValue:
1306 case vmIntrinsics::_shortValue:
1307 case vmIntrinsics::_intValue:
1308 case vmIntrinsics::_longValue:
1309 case vmIntrinsics::_floatValue:
1310 case vmIntrinsics::_doubleValue:
1311 return true;
1312 default:
1313 return false;
1314 }
1315 }
1316 return false;
1317 }
1318
1319 BCEscapeAnalyzer *ciMethod::get_bcea() {
1320 #ifdef COMPILER2
1321 if (_bcea == NULL) {
1322 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1323 }
1324 return _bcea;
1325 #else // COMPILER2
1326 ShouldNotReachHere();
1327 return NULL;
1328 #endif // COMPILER2
1329 }
1330
1331 ciMethodBlocks *ciMethod::get_method_blocks() {
1332 Arena *arena = CURRENT_ENV->arena();
1333 if (_method_blocks == NULL) {
1334 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1335 }
1336 return _method_blocks;
1337 }
1338
1339 #undef FETCH_FLAG_FROM_VM
1340
1341 void ciMethod::dump_name_as_ascii(outputStream* st) {
1342 Method* method = get_Method();
1343 st->print("%s %s %s",
1344 method->klass_name()->as_quoted_ascii(),
1345 method->name()->as_quoted_ascii(),
1346 method->signature()->as_quoted_ascii());
1347 }
1348
1349 void ciMethod::dump_replay_data(outputStream* st) {
1350 ResourceMark rm;
1351 Method* method = get_Method();
1352 MethodCounters* mcs = method->method_counters();
1353 st->print("ciMethod ");
1354 dump_name_as_ascii(st);
1355 st->print_cr(" %d %d %d %d %d",
1356 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1357 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1358 interpreter_invocation_count(),
1359 interpreter_throwout_count(),
1360 _instructions_size);
1361 }
1362
1363 // ------------------------------------------------------------------
1364 // ciMethod::print_codes
1365 //
1366 // Print a range of the bytecodes for this method.
1367 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1368 check_is_loaded();
1369 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1370 }
1371
1372 // ------------------------------------------------------------------
1373 // ciMethod::print_name
1374 //
1375 // Print the name of this method, including signature and some flags.
1376 void ciMethod::print_name(outputStream* st) {
1377 check_is_loaded();
1378 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1379 }
1380
1381 // ------------------------------------------------------------------
1382 // ciMethod::print_short_name
1383 //
1384 // Print the name of this method, without signature.
1385 void ciMethod::print_short_name(outputStream* st) {
1386 if (is_loaded()) {
1387 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1388 } else {
1389 // Fall back if method is not loaded.
1390 holder()->print_name_on(st);
1391 st->print("::");
1392 name()->print_symbol_on(st);
1393 if (WizardMode)
1394 signature()->as_symbol()->print_symbol_on(st);
1395 }
1396 }
1397
1398 // ------------------------------------------------------------------
1399 // ciMethod::print_impl
1400 //
1401 // Implementation of the print method.
1402 void ciMethod::print_impl(outputStream* st) {
1403 ciMetadata::print_impl(st);
1404 st->print(" name=");
1405 name()->print_symbol_on(st);
1406 st->print(" holder=");
1407 holder()->print_name_on(st);
1408 st->print(" signature=");
1409 signature()->as_symbol()->print_symbol_on(st);
1410 if (is_loaded()) {
1411 st->print(" loaded=true");
1412 st->print(" arg_size=%d", arg_size());
1413 st->print(" flags=");
1414 flags().print_member_flags(st);
1415 } else {
1416 st->print(" loaded=false");
1417 }
1418 }
1419
1420 // ------------------------------------------------------------------
1421
1422 static BasicType erase_to_word_type(BasicType bt) {
1423 if (is_subword_type(bt)) return T_INT;
1424 if (bt == T_ARRAY) return T_OBJECT;
1425 return bt;
1426 }
1427
1428 static bool basic_types_match(ciType* t1, ciType* t2) {
1429 if (t1 == t2) return true;
1430 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1431 }
1432
1433 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1434 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1435 !resolved_method->is_method_handle_intrinsic();
1436
1437 if (!invoke_through_mh_intrinsic) {
1438 // Method name & descriptor should stay the same.
1439 // Signatures may reference unloaded types and thus they may be not strictly equal.
1440 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1441 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1442
1443 return (declared_method->name()->equals(resolved_method->name())) &&
1444 (declared_signature->equals(resolved_signature));
1445 }
1446
1447 ciMethod* linker = declared_method;
1448 ciMethod* target = resolved_method;
1449 // Linkers have appendix argument which is not passed to callee.
1450 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1451 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1452 return false; // argument slot count mismatch
1453 }
1454
1455 ciSignature* linker_sig = linker->signature();
1456 ciSignature* target_sig = target->signature();
1457
1458 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1459 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1460 return false; // argument count mismatch
1461 }
1462
1463 int sbase = 0, rbase = 0;
1464 switch (linker->intrinsic_id()) {
1465 case vmIntrinsics::_linkToVirtual:
1466 case vmIntrinsics::_linkToInterface:
1467 case vmIntrinsics::_linkToSpecial: {
1468 if (target->is_static()) {
1469 return false;
1470 }
1471 if (linker_sig->type_at(0)->is_primitive_type()) {
1472 return false; // receiver should be an oop
1473 }
1474 sbase = 1; // skip receiver
1475 break;
1476 }
1477 case vmIntrinsics::_linkToStatic: {
1478 if (!target->is_static()) {
1479 return false;
1480 }
1481 break;
1482 }
1483 case vmIntrinsics::_invokeBasic: {
1484 if (target->is_static()) {
1485 if (target_sig->type_at(0)->is_primitive_type()) {
1486 return false; // receiver should be an oop
1487 }
1488 rbase = 1; // skip receiver
1489 }
1490 break;
1491 }
1492 }
1493 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1494 int arg_count = target_sig->count() - rbase;
1495 for (int i = 0; i < arg_count; i++) {
1496 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1497 return false;
1498 }
1499 }
1500 // Only check the return type if the symbolic info has non-void return type.
1501 // I.e. the return value of the resolved method can be dropped.
1502 if (!linker->return_type()->is_void() &&
1503 !basic_types_match(linker->return_type(), target->return_type())) {
1504 return false;
1505 }
1506 return true; // no mismatch found
1507 }
1508
1509 // ------------------------------------------------------------------
1510
1511 #if INCLUDE_TRACE
1512 TraceStructCalleeMethod ciMethod::to_trace_struct() const {
1513 TraceStructCalleeMethod result;
1514 result.set_type(holder()->name()->as_utf8());
1515 result.set_name(name()->as_utf8());
1516 result.set_descriptor(signature()->as_symbol()->as_utf8());
1517 return result;
1518 }
1519 #endif