1 /*
2 * Copyright (c) 1999, 2013, 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/compilerOracle.hpp"
39 #include "compiler/methodLiveness.hpp"
40 #include "interpreter/interpreter.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "interpreter/oopMapCache.hpp"
43 #include "memory/allocation.inline.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "oops/generateOopMap.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "utilities/bitMap.inline.hpp"
50 #include "utilities/xmlstream.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) : ciMetadata(h_m()) {
72 assert(h_m() != NULL, "no null method");
73
74 // These fields are always filled in in loaded methods.
75 _flags = ciFlags(h_m()->access_flags());
76
77 // Easy to compute, so fill them in now.
78 _max_stack = h_m()->max_stack();
79 _max_locals = h_m()->max_locals();
80 _code_size = h_m()->code_size();
81 _intrinsic_id = h_m()->intrinsic_id();
82 _handler_count = h_m()->exception_table_length();
83 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
84 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
85 _is_c1_compilable = !h_m()->is_not_c1_compilable();
86 _is_c2_compilable = !h_m()->is_not_c2_compilable();
87 // Lazy fields, filled in on demand. Require allocation.
88 _code = NULL;
89 _exception_handlers = NULL;
90 _liveness = NULL;
91 _method_blocks = NULL;
92 #if defined(COMPILER2) || defined(SHARK)
93 _flow = NULL;
94 _bcea = NULL;
95 #endif // COMPILER2 || SHARK
96
97 ciEnv *env = CURRENT_ENV;
98 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
99 // 6328518 check hotswap conditions under the right lock.
100 MutexLocker locker(Compile_lock);
101 if (Dependencies::check_evol_method(h_m()) != NULL) {
102 _is_c1_compilable = false;
103 _is_c2_compilable = false;
104 }
105 } else {
106 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
107 }
108
109 if (h_m()->method_holder()->is_linked()) {
110 _can_be_statically_bound = h_m()->can_be_statically_bound();
111 } else {
112 // Have to use a conservative value in this case.
113 _can_be_statically_bound = false;
114 }
115
116 // Adjust the definition of this condition to be more useful:
117 // %%% take these conditions into account in vtable generation
118 if (!_can_be_statically_bound && h_m()->is_private())
119 _can_be_statically_bound = true;
120 if (_can_be_statically_bound && h_m()->is_abstract())
121 _can_be_statically_bound = false;
122
123 // generating _signature may allow GC and therefore move m.
124 // These fields are always filled in.
125 _name = env->get_symbol(h_m()->name());
126 _holder = env->get_instance_klass(h_m()->method_holder());
127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
128 constantPoolHandle cpool = h_m()->constants();
129 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
130 _method_data = NULL;
131 // Take a snapshot of these values, so they will be commensurate with the MDO.
132 if (ProfileInterpreter || TieredCompilation) {
133 int invcnt = h_m()->interpreter_invocation_count();
134 // if the value overflowed report it as max int
135 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
136 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
137 } else {
138 _interpreter_invocation_count = 0;
139 _interpreter_throwout_count = 0;
140 }
141 if (_interpreter_invocation_count == 0)
142 _interpreter_invocation_count = 1;
143 _instructions_size = -1;
144 #ifdef ASSERT
145 if (ReplayCompiles) {
146 ciReplay::initialize(this);
147 }
148 #endif
149 }
150
151
152 // ------------------------------------------------------------------
153 // ciMethod::ciMethod
154 //
155 // Unloaded method.
156 ciMethod::ciMethod(ciInstanceKlass* holder,
157 ciSymbol* name,
158 ciSymbol* signature,
159 ciInstanceKlass* accessor) :
160 ciMetadata((Metadata*)NULL),
161 _name( name),
162 _holder( holder),
163 _intrinsic_id( vmIntrinsics::_none),
164 _liveness( NULL),
165 _can_be_statically_bound(false),
166 _method_blocks( NULL),
167 _method_data( NULL)
168 #if defined(COMPILER2) || defined(SHARK)
169 ,
170 _flow( NULL),
171 _bcea( NULL),
172 _instructions_size(-1)
173 #endif // COMPILER2 || SHARK
174 {
175 // Usually holder and accessor are the same type but in some cases
176 // the holder has the wrong class loader (e.g. invokedynamic call
177 // sites) so we pass the accessor.
178 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
179 }
180
181
182 // ------------------------------------------------------------------
183 // ciMethod::load_code
184 //
185 // Load the bytecodes and exception handler table for this method.
186 void ciMethod::load_code() {
187 VM_ENTRY_MARK;
188 assert(is_loaded(), "only loaded methods have code");
189
190 Method* me = get_Method();
191 Arena* arena = CURRENT_THREAD_ENV->arena();
192
193 // Load the bytecodes.
194 _code = (address)arena->Amalloc(code_size());
195 memcpy(_code, me->code_base(), code_size());
196
197 // Revert any breakpoint bytecodes in ci's copy
198 if (me->number_of_breakpoints() > 0) {
199 BreakpointInfo* bp = me->method_holder()->breakpoints();
200 for (; bp != NULL; bp = bp->next()) {
201 if (bp->match(me)) {
202 code_at_put(bp->bci(), bp->orig_bytecode());
203 }
204 }
205 }
206
207 // And load the exception table.
208 ExceptionTable exc_table(me);
209
210 // Allocate one extra spot in our list of exceptions. This
211 // last entry will be used to represent the possibility that
212 // an exception escapes the method. See ciExceptionHandlerStream
213 // for details.
214 _exception_handlers =
215 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
216 * (_handler_count + 1));
217 if (_handler_count > 0) {
218 for (int i=0; i<_handler_count; i++) {
219 _exception_handlers[i] = new (arena) ciExceptionHandler(
220 holder(),
221 /* start */ exc_table.start_pc(i),
222 /* limit */ exc_table.end_pc(i),
223 /* goto pc */ exc_table.handler_pc(i),
224 /* cp index */ exc_table.catch_type_index(i));
225 }
226 }
227
228 // Put an entry at the end of our list to represent the possibility
229 // of exceptional exit.
230 _exception_handlers[_handler_count] =
231 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
232
233 if (CIPrintMethodCodes) {
234 print_codes();
235 }
236 }
237
238
239 // ------------------------------------------------------------------
240 // ciMethod::has_linenumber_table
241 //
242 // length unknown until decompression
243 bool ciMethod::has_linenumber_table() const {
244 check_is_loaded();
245 VM_ENTRY_MARK;
246 return get_Method()->has_linenumber_table();
247 }
248
249
250 // ------------------------------------------------------------------
251 // ciMethod::compressed_linenumber_table
252 u_char* ciMethod::compressed_linenumber_table() const {
253 check_is_loaded();
254 VM_ENTRY_MARK;
255 return get_Method()->compressed_linenumber_table();
256 }
257
258
259 // ------------------------------------------------------------------
260 // ciMethod::line_number_from_bci
261 int ciMethod::line_number_from_bci(int bci) const {
262 check_is_loaded();
263 VM_ENTRY_MARK;
264 return get_Method()->line_number_from_bci(bci);
265 }
266
267
268 // ------------------------------------------------------------------
269 // ciMethod::vtable_index
270 //
271 // Get the position of this method's entry in the vtable, if any.
272 int ciMethod::vtable_index() {
273 check_is_loaded();
274 assert(holder()->is_linked(), "must be linked");
275 VM_ENTRY_MARK;
276 return get_Method()->vtable_index();
277 }
278
279
280 #ifdef SHARK
281 // ------------------------------------------------------------------
282 // ciMethod::itable_index
283 //
284 // Get the position of this method's entry in the itable, if any.
285 int ciMethod::itable_index() {
286 check_is_loaded();
287 assert(holder()->is_linked(), "must be linked");
288 VM_ENTRY_MARK;
289 Method* m = get_Method();
290 if (!m->has_itable_index())
291 return Method::nonvirtual_vtable_index;
292 return m->itable_index();
293 }
294 #endif // SHARK
295
296
297 // ------------------------------------------------------------------
298 // ciMethod::native_entry
299 //
300 // Get the address of this method's native code, if any.
301 address ciMethod::native_entry() {
302 check_is_loaded();
303 assert(flags().is_native(), "must be native method");
304 VM_ENTRY_MARK;
305 Method* method = get_Method();
306 address entry = method->native_function();
307 assert(entry != NULL, "must be valid entry point");
308 return entry;
309 }
310
311
312 // ------------------------------------------------------------------
313 // ciMethod::interpreter_entry
314 //
315 // Get the entry point for running this method in the interpreter.
316 address ciMethod::interpreter_entry() {
317 check_is_loaded();
318 VM_ENTRY_MARK;
319 methodHandle mh(THREAD, get_Method());
320 return Interpreter::entry_for_method(mh);
321 }
322
323
324 // ------------------------------------------------------------------
325 // ciMethod::uses_balanced_monitors
326 //
327 // Does this method use monitors in a strict stack-disciplined manner?
328 bool ciMethod::has_balanced_monitors() {
329 check_is_loaded();
330 if (_balanced_monitors) return true;
331
332 // Analyze the method to see if monitors are used properly.
333 VM_ENTRY_MARK;
334 methodHandle method(THREAD, get_Method());
335 assert(method->has_monitor_bytecodes(), "should have checked this");
336
337 // Check to see if a previous compilation computed the
338 // monitor-matching analysis.
339 if (method->guaranteed_monitor_matching()) {
340 _balanced_monitors = true;
341 return true;
342 }
343
344 {
345 EXCEPTION_MARK;
346 ResourceMark rm(THREAD);
347 GeneratePairingInfo gpi(method);
348 gpi.compute_map(CATCH);
349 if (!gpi.monitor_safe()) {
350 return false;
351 }
352 method->set_guaranteed_monitor_matching();
353 _balanced_monitors = true;
354 }
355 return true;
356 }
357
358
359 // ------------------------------------------------------------------
360 // ciMethod::get_flow_analysis
361 ciTypeFlow* ciMethod::get_flow_analysis() {
362 #if defined(COMPILER2) || defined(SHARK)
363 if (_flow == NULL) {
364 ciEnv* env = CURRENT_ENV;
365 _flow = new (env->arena()) ciTypeFlow(env, this);
366 _flow->do_flow();
367 }
368 return _flow;
369 #else // COMPILER2 || SHARK
370 ShouldNotReachHere();
371 return NULL;
372 #endif // COMPILER2 || SHARK
373 }
374
375
376 // ------------------------------------------------------------------
377 // ciMethod::get_osr_flow_analysis
378 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
379 #if defined(COMPILER2) || defined(SHARK)
380 // OSR entry points are always place after a call bytecode of some sort
381 assert(osr_bci >= 0, "must supply valid OSR entry point");
382 ciEnv* env = CURRENT_ENV;
383 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
384 flow->do_flow();
385 return flow;
386 #else // COMPILER2 || SHARK
387 ShouldNotReachHere();
388 return NULL;
389 #endif // COMPILER2 || SHARK
390 }
391
392 // ------------------------------------------------------------------
393 // ciMethod::raw_liveness_at_bci
394 //
395 // Which local variables are live at a specific bci?
396 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
397 check_is_loaded();
398 if (_liveness == NULL) {
399 // Create the liveness analyzer.
400 Arena* arena = CURRENT_ENV->arena();
401 _liveness = new (arena) MethodLiveness(arena, this);
402 _liveness->compute_liveness();
403 }
404 return _liveness->get_liveness_at(bci);
405 }
406
407 // ------------------------------------------------------------------
408 // ciMethod::liveness_at_bci
409 //
410 // Which local variables are live at a specific bci? When debugging
411 // will return true for all locals in some cases to improve debug
412 // information.
413 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
414 MethodLivenessResult result = raw_liveness_at_bci(bci);
415 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
416 // Keep all locals live for the user's edification and amusement.
417 result.at_put_range(0, result.size(), true);
418 }
419 return result;
420 }
421
422 // ciMethod::live_local_oops_at_bci
423 //
424 // find all the live oops in the locals array for a particular bci
425 // Compute what the interpreter believes by using the interpreter
426 // oopmap generator. This is used as a double check during osr to
427 // guard against conservative result from MethodLiveness making us
428 // think a dead oop is live. MethodLiveness is conservative in the
429 // sense that it may consider locals to be live which cannot be live,
430 // like in the case where a local could contain an oop or a primitive
431 // along different paths. In that case the local must be dead when
432 // those paths merge. Since the interpreter's viewpoint is used when
433 // gc'ing an interpreter frame we need to use its viewpoint during
434 // OSR when loading the locals.
435
436 BitMap ciMethod::live_local_oops_at_bci(int bci) {
437 VM_ENTRY_MARK;
438 InterpreterOopMap mask;
439 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
440 int mask_size = max_locals();
441 BitMap result(mask_size);
442 result.clear();
443 int i;
444 for (i = 0; i < mask_size ; i++ ) {
445 if (mask.is_oop(i)) result.set_bit(i);
446 }
447 return result;
448 }
449
450
451 #ifdef COMPILER1
452 // ------------------------------------------------------------------
453 // ciMethod::bci_block_start
454 //
455 // Marks all bcis where a new basic block starts
456 const BitMap ciMethod::bci_block_start() {
457 check_is_loaded();
458 if (_liveness == NULL) {
459 // Create the liveness analyzer.
460 Arena* arena = CURRENT_ENV->arena();
461 _liveness = new (arena) MethodLiveness(arena, this);
462 _liveness->compute_liveness();
463 }
464
465 return _liveness->get_bci_block_start();
466 }
467 #endif // COMPILER1
468
469
470 // ------------------------------------------------------------------
471 // ciMethod::call_profile_at_bci
472 //
473 // Get the ciCallProfile for the invocation of this method.
474 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
475 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
476 ResourceMark rm;
477 ciCallProfile result;
478 if (method_data() != NULL && method_data()->is_mature()) {
479 ciProfileData* data = method_data()->bci_to_data(bci);
480 if (data != NULL && data->is_CounterData()) {
481 // Every profiled call site has a counter.
482 int count = data->as_CounterData()->count();
483
484 if (!data->is_ReceiverTypeData()) {
485 result._receiver_count[0] = 0; // that's a definite zero
486 } else { // ReceiverTypeData is a subclass of CounterData
487 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
488 // In addition, virtual call sites have receiver type information
489 int receivers_count_total = 0;
490 int morphism = 0;
491 // Precompute morphism for the possible fixup
492 for (uint i = 0; i < call->row_limit(); i++) {
493 ciKlass* receiver = call->receiver(i);
494 if (receiver == NULL) continue;
495 morphism++;
496 }
497 int epsilon = 0;
498 if (TieredCompilation && ProfileInterpreter) {
499 // Interpreter and C1 treat final and special invokes differently.
500 // C1 will record a type, whereas the interpreter will just
501 // increment the count. Detect this case.
502 if (morphism == 1 && count > 0) {
503 epsilon = count;
504 count = 0;
505 }
506 }
507 for (uint i = 0; i < call->row_limit(); i++) {
508 ciKlass* receiver = call->receiver(i);
509 if (receiver == NULL) continue;
510 int rcount = call->receiver_count(i) + epsilon;
511 if (rcount == 0) rcount = 1; // Should be valid value
512 receivers_count_total += rcount;
513 // Add the receiver to result data.
514 result.add_receiver(receiver, rcount);
515 // If we extend profiling to record methods,
516 // we will set result._method also.
517 }
518 // Determine call site's morphism.
519 // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
520 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
521 // The call site count is > 0 in the case of a polymorphic virtual call.
522 if (morphism > 0 && morphism == result._limit) {
523 // The morphism <= MorphismLimit.
524 if ((morphism < ciCallProfile::MorphismLimit) ||
525 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
526 #ifdef ASSERT
527 if (count > 0) {
528 this->print_short_name(tty);
529 tty->print_cr(" @ bci:%d", bci);
530 this->print_codes();
531 assert(false, "this call site should not be polymorphic");
532 }
533 #endif
534 result._morphism = morphism;
535 }
536 }
537 // Make the count consistent if this is a call profile. If count is
538 // zero or less, presume that this is a typecheck profile and
539 // do nothing. Otherwise, increase count to be the sum of all
540 // receiver's counts.
541 if (count >= 0) {
542 count += receivers_count_total;
543 }
544 }
545 result._count = count;
546 }
547 }
548 return result;
549 }
550
551 // ------------------------------------------------------------------
552 // Add new receiver and sort data by receiver's profile count.
553 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
554 // Add new receiver and sort data by receiver's counts when we have space
555 // for it otherwise replace the less called receiver (less called receiver
556 // is placed to the last array element which is not used).
557 // First array's element contains most called receiver.
558 int i = _limit;
559 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
560 _receiver[i] = _receiver[i-1];
561 _receiver_count[i] = _receiver_count[i-1];
562 }
563 _receiver[i] = receiver;
564 _receiver_count[i] = receiver_count;
565 if (_limit < MorphismLimit) _limit++;
566 }
567
568
569 void ciMethod::assert_virtual_call_type_ok(int bci) {
570 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
571 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
572 }
573
574 void ciMethod::assert_call_type_ok(int bci) {
575 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
576 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
577 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
578 }
579
580 /**
581 * Check whether profiling provides a type for the argument i to the
582 * call at bci bci
583 *
584 * @param bci bci of the call
585 * @param i argument number
586 * @return profiled type
587 *
588 * If the profile reports that the argument may be null, return false
589 * at least for now.
590 */
591 ciKlass* ciMethod::argument_profiled_type(int bci, int i) {
592 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
593 ciProfileData* data = method_data()->bci_to_data(bci);
594 if (data != NULL) {
595 if (data->is_VirtualCallTypeData()) {
596 assert_virtual_call_type_ok(bci);
597 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
598 if (i >= call->number_of_arguments()) {
599 return NULL;
600 }
601 ciKlass* type = call->valid_argument_type(i);
602 if (type != NULL && !call->argument_maybe_null(i)) {
603 return type;
604 }
605 } else if (data->is_CallTypeData()) {
606 assert_call_type_ok(bci);
607 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
608 if (i >= call->number_of_arguments()) {
609 return NULL;
610 }
611 ciKlass* type = call->valid_argument_type(i);
612 if (type != NULL && !call->argument_maybe_null(i)) {
613 return type;
614 }
615 }
616 }
617 }
618 return NULL;
619 }
620
621 /**
622 * Check whether profiling provides a type for the return value from
623 * the call at bci bci
624 *
625 * @param bci bci of the call
626 * @return profiled type
627 *
628 * If the profile reports that the argument may be null, return false
629 * at least for now.
630 */
631 ciKlass* ciMethod::return_profiled_type(int bci) {
632 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
633 ciProfileData* data = method_data()->bci_to_data(bci);
634 if (data != NULL) {
635 if (data->is_VirtualCallTypeData()) {
636 assert_virtual_call_type_ok(bci);
637 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
638 ciKlass* type = call->valid_return_type();
639 if (type != NULL && !call->return_maybe_null()) {
640 return type;
641 }
642 } else if (data->is_CallTypeData()) {
643 assert_call_type_ok(bci);
644 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
645 ciKlass* type = call->valid_return_type();
646 if (type != NULL && !call->return_maybe_null()) {
647 return type;
648 }
649 }
650 }
651 }
652 return NULL;
653 }
654
655 /**
656 * Check whether profiling provides a type for the parameter i
657 *
658 * @param i parameter number
659 * @return profiled type
660 *
661 * If the profile reports that the argument may be null, return false
662 * at least for now.
663 */
664 ciKlass* ciMethod::parameter_profiled_type(int i) {
665 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
666 ciParametersTypeData* parameters = method_data()->parameters_type_data();
667 if (parameters != NULL && i < parameters->number_of_parameters()) {
668 ciKlass* type = parameters->valid_parameter_type(i);
669 if (type != NULL && !parameters->parameter_maybe_null(i)) {
670 return type;
671 }
672 }
673 }
674 return NULL;
675 }
676
677
678 // ------------------------------------------------------------------
679 // ciMethod::find_monomorphic_target
680 //
681 // Given a certain calling environment, find the monomorphic target
682 // for the call. Return NULL if the call is not monomorphic in
683 // its calling environment, or if there are only abstract methods.
684 // The returned method is never abstract.
685 // Note: If caller uses a non-null result, it must inform dependencies
686 // via assert_unique_concrete_method or assert_leaf_type.
687 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
688 ciInstanceKlass* callee_holder,
689 ciInstanceKlass* actual_recv) {
690 check_is_loaded();
691
692 if (actual_recv->is_interface()) {
693 // %%% We cannot trust interface types, yet. See bug 6312651.
694 return NULL;
695 }
696
697 ciMethod* root_m = resolve_invoke(caller, actual_recv);
698 if (root_m == NULL) {
699 // Something went wrong looking up the actual receiver method.
700 return NULL;
701 }
702 assert(!root_m->is_abstract(), "resolve_invoke promise");
703
704 // Make certain quick checks even if UseCHA is false.
705
706 // Is it private or final?
707 if (root_m->can_be_statically_bound()) {
708 return root_m;
709 }
710
711 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
712 // Easy case. There is no other place to put a method, so don't bother
713 // to go through the VM_ENTRY_MARK and all the rest.
714 return root_m;
715 }
716
717 // Array methods (clone, hashCode, etc.) are always statically bound.
718 // If we were to see an array type here, we'd return root_m.
719 // However, this method processes only ciInstanceKlasses. (See 4962591.)
720 // The inline_native_clone intrinsic narrows Object to T[] properly,
721 // so there is no need to do the same job here.
722
723 if (!UseCHA) return NULL;
724
725 VM_ENTRY_MARK;
726
727 methodHandle target;
728 {
729 MutexLocker locker(Compile_lock);
730 Klass* context = actual_recv->get_Klass();
731 target = Dependencies::find_unique_concrete_method(context,
732 root_m->get_Method());
733 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
734 }
735
736 #ifndef PRODUCT
737 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
738 tty->print("found a non-root unique target method");
739 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
740 tty->print(" method = ");
741 target->print_short_name(tty);
742 tty->cr();
743 }
744 #endif //PRODUCT
745
746 if (target() == NULL) {
747 return NULL;
748 }
749 if (target() == root_m->get_Method()) {
750 return root_m;
751 }
752 if (!root_m->is_public() &&
753 !root_m->is_protected()) {
754 // If we are going to reason about inheritance, it's easiest
755 // if the method in question is public, protected, or private.
756 // If the answer is not root_m, it is conservatively correct
757 // to return NULL, even if the CHA encountered irrelevant
758 // methods in other packages.
759 // %%% TO DO: Work out logic for package-private methods
760 // with the same name but different vtable indexes.
761 return NULL;
762 }
763 return CURRENT_THREAD_ENV->get_method(target());
764 }
765
766 // ------------------------------------------------------------------
767 // ciMethod::resolve_invoke
768 //
769 // Given a known receiver klass, find the target for the call.
770 // Return NULL if the call has no target or the target is abstract.
771 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
772 check_is_loaded();
773 VM_ENTRY_MARK;
774
775 KlassHandle caller_klass (THREAD, caller->get_Klass());
776 KlassHandle h_recv (THREAD, exact_receiver->get_Klass());
777 KlassHandle h_resolved (THREAD, holder()->get_Klass());
778 Symbol* h_name = name()->get_symbol();
779 Symbol* h_signature = signature()->get_symbol();
780
781 methodHandle m;
782 // Only do exact lookup if receiver klass has been linked. Otherwise,
783 // the vtable has not been setup, and the LinkResolver will fail.
784 if (h_recv->oop_is_array()
785 ||
786 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
787 if (holder()->is_interface()) {
788 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
789 } else {
790 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
791 }
792 }
793
794 if (m.is_null()) {
795 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
796 return NULL;
797 }
798
799 ciMethod* result = this;
800 if (m() != get_Method()) {
801 result = CURRENT_THREAD_ENV->get_method(m());
802 }
803
804 // Don't return abstract methods because they aren't
805 // optimizable or interesting.
806 if (result->is_abstract()) {
807 return NULL;
808 } else {
809 return result;
810 }
811 }
812
813 // ------------------------------------------------------------------
814 // ciMethod::resolve_vtable_index
815 //
816 // Given a known receiver klass, find the vtable index for the call.
817 // Return Method::invalid_vtable_index if the vtable_index is unknown.
818 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
819 check_is_loaded();
820
821 int vtable_index = Method::invalid_vtable_index;
822 // Only do lookup if receiver klass has been linked. Otherwise,
823 // the vtable has not been setup, and the LinkResolver will fail.
824 if (!receiver->is_interface()
825 && (!receiver->is_instance_klass() ||
826 receiver->as_instance_klass()->is_linked())) {
827 VM_ENTRY_MARK;
828
829 KlassHandle caller_klass (THREAD, caller->get_Klass());
830 KlassHandle h_recv (THREAD, receiver->get_Klass());
831 Symbol* h_name = name()->get_symbol();
832 Symbol* h_signature = signature()->get_symbol();
833
834 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
835 if (vtable_index == Method::nonvirtual_vtable_index) {
836 // A statically bound method. Return "no such index".
837 vtable_index = Method::invalid_vtable_index;
838 }
839 }
840
841 return vtable_index;
842 }
843
844 // ------------------------------------------------------------------
845 // ciMethod::interpreter_call_site_count
846 int ciMethod::interpreter_call_site_count(int bci) {
847 if (method_data() != NULL) {
848 ResourceMark rm;
849 ciProfileData* data = method_data()->bci_to_data(bci);
850 if (data != NULL && data->is_CounterData()) {
851 return scale_count(data->as_CounterData()->count());
852 }
853 }
854 return -1; // unknown
855 }
856
857 // ------------------------------------------------------------------
858 // ciMethod::get_field_at_bci
859 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
860 ciBytecodeStream iter(this);
861 iter.reset_to_bci(bci);
862 iter.next();
863 return iter.get_field(will_link);
864 }
865
866 // ------------------------------------------------------------------
867 // ciMethod::get_method_at_bci
868 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
869 ciBytecodeStream iter(this);
870 iter.reset_to_bci(bci);
871 iter.next();
872 return iter.get_method(will_link, declared_signature);
873 }
874
875 // ------------------------------------------------------------------
876 // Adjust a CounterData count to be commensurate with
877 // interpreter_invocation_count. If the MDO exists for
878 // only 25% of the time the method exists, then the
879 // counts in the MDO should be scaled by 4X, so that
880 // they can be usefully and stably compared against the
881 // invocation counts in methods.
882 int ciMethod::scale_count(int count, float prof_factor) {
883 if (count > 0 && method_data() != NULL) {
884 int counter_life;
885 int method_life = interpreter_invocation_count();
886 if (TieredCompilation) {
887 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
888 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
889 } else {
890 int current_mileage = method_data()->current_mileage();
891 int creation_mileage = method_data()->creation_mileage();
892 counter_life = current_mileage - creation_mileage;
893 }
894
895 // counter_life due to backedge_counter could be > method_life
896 if (counter_life > method_life)
897 counter_life = method_life;
898 if (0 < counter_life && counter_life <= method_life) {
899 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
900 count = (count > 0) ? count : 1;
901 }
902 }
903 return count;
904 }
905
906
907 // ------------------------------------------------------------------
908 // ciMethod::is_special_get_caller_class_method
909 //
910 bool ciMethod::is_ignored_by_security_stack_walk() const {
911 check_is_loaded();
912 VM_ENTRY_MARK;
913 return get_Method()->is_ignored_by_security_stack_walk();
914 }
915
916
917 // ------------------------------------------------------------------
918 // invokedynamic support
919
920 // ------------------------------------------------------------------
921 // ciMethod::is_method_handle_intrinsic
922 //
923 // Return true if the method is an instance of the JVM-generated
924 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
925 bool ciMethod::is_method_handle_intrinsic() const {
926 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
927 return (MethodHandles::is_signature_polymorphic(iid) &&
928 MethodHandles::is_signature_polymorphic_intrinsic(iid));
929 }
930
931 // ------------------------------------------------------------------
932 // ciMethod::is_compiled_lambda_form
933 //
934 // Return true if the method is a generated MethodHandle adapter.
935 // These are built by Java code.
936 bool ciMethod::is_compiled_lambda_form() const {
937 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
938 return iid == vmIntrinsics::_compiledLambdaForm;
939 }
940
941 // ------------------------------------------------------------------
942 // ciMethod::has_member_arg
943 //
944 // Return true if the method is a linker intrinsic like _linkToVirtual.
945 // These are built by the JVM.
946 bool ciMethod::has_member_arg() const {
947 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
948 return (MethodHandles::is_signature_polymorphic(iid) &&
949 MethodHandles::has_member_arg(iid));
950 }
951
952 // ------------------------------------------------------------------
953 // ciMethod::ensure_method_data
954 //
955 // Generate new MethodData* objects at compile time.
956 // Return true if allocation was successful or no MDO is required.
957 bool ciMethod::ensure_method_data(methodHandle h_m) {
958 EXCEPTION_CONTEXT;
959 if (is_native() || is_abstract() || h_m()->is_accessor()) {
960 return true;
961 }
962 if (h_m()->method_data() == NULL) {
963 Method::build_interpreter_method_data(h_m, THREAD);
964 if (HAS_PENDING_EXCEPTION) {
965 CLEAR_PENDING_EXCEPTION;
966 }
967 }
968 if (h_m()->method_data() != NULL) {
969 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
970 _method_data->load_data();
971 return true;
972 } else {
973 _method_data = CURRENT_ENV->get_empty_methodData();
974 return false;
975 }
976 }
977
978 // public, retroactive version
979 bool ciMethod::ensure_method_data() {
980 bool result = true;
981 if (_method_data == NULL || _method_data->is_empty()) {
982 GUARDED_VM_ENTRY({
983 result = ensure_method_data(get_Method());
984 });
985 }
986 return result;
987 }
988
989
990 // ------------------------------------------------------------------
991 // ciMethod::method_data
992 //
993 ciMethodData* ciMethod::method_data() {
994 if (_method_data != NULL) {
995 return _method_data;
996 }
997 VM_ENTRY_MARK;
998 ciEnv* env = CURRENT_ENV;
999 Thread* my_thread = JavaThread::current();
1000 methodHandle h_m(my_thread, get_Method());
1001
1002 if (h_m()->method_data() != NULL) {
1003 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1004 _method_data->load_data();
1005 } else {
1006 _method_data = CURRENT_ENV->get_empty_methodData();
1007 }
1008 return _method_data;
1009
1010 }
1011
1012 // ------------------------------------------------------------------
1013 // ciMethod::method_data_or_null
1014 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1015 // NULL otherwise.
1016 ciMethodData* ciMethod::method_data_or_null() {
1017 ciMethodData *md = method_data();
1018 if (md->is_empty()) {
1019 return NULL;
1020 }
1021 return md;
1022 }
1023
1024 // ------------------------------------------------------------------
1025 // ciMethod::ensure_method_counters
1026 //
1027 MethodCounters* ciMethod::ensure_method_counters() {
1028 check_is_loaded();
1029 VM_ENTRY_MARK;
1030 methodHandle mh(THREAD, get_Method());
1031 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1032 return method_counters;
1033 }
1034
1035 // ------------------------------------------------------------------
1036 // ciMethod::should_exclude
1037 //
1038 // Should this method be excluded from compilation?
1039 bool ciMethod::should_exclude() {
1040 check_is_loaded();
1041 VM_ENTRY_MARK;
1042 methodHandle mh(THREAD, get_Method());
1043 bool ignore;
1044 return CompilerOracle::should_exclude(mh, ignore);
1045 }
1046
1047 // ------------------------------------------------------------------
1048 // ciMethod::should_inline
1049 //
1050 // Should this method be inlined during compilation?
1051 bool ciMethod::should_inline() {
1052 check_is_loaded();
1053 VM_ENTRY_MARK;
1054 methodHandle mh(THREAD, get_Method());
1055 return CompilerOracle::should_inline(mh);
1056 }
1057
1058 // ------------------------------------------------------------------
1059 // ciMethod::should_not_inline
1060 //
1061 // Should this method be disallowed from inlining during compilation?
1062 bool ciMethod::should_not_inline() {
1063 check_is_loaded();
1064 VM_ENTRY_MARK;
1065 methodHandle mh(THREAD, get_Method());
1066 return CompilerOracle::should_not_inline(mh);
1067 }
1068
1069 // ------------------------------------------------------------------
1070 // ciMethod::should_print_assembly
1071 //
1072 // Should the compiler print the generated code for this method?
1073 bool ciMethod::should_print_assembly() {
1074 check_is_loaded();
1075 VM_ENTRY_MARK;
1076 methodHandle mh(THREAD, get_Method());
1077 return CompilerOracle::should_print(mh);
1078 }
1079
1080 // ------------------------------------------------------------------
1081 // ciMethod::break_at_execute
1082 //
1083 // Should the compiler insert a breakpoint into the generated code
1084 // method?
1085 bool ciMethod::break_at_execute() {
1086 check_is_loaded();
1087 VM_ENTRY_MARK;
1088 methodHandle mh(THREAD, get_Method());
1089 return CompilerOracle::should_break_at(mh);
1090 }
1091
1092 // ------------------------------------------------------------------
1093 // ciMethod::has_option
1094 //
1095 bool ciMethod::has_option(const char* option) {
1096 check_is_loaded();
1097 VM_ENTRY_MARK;
1098 methodHandle mh(THREAD, get_Method());
1099 return CompilerOracle::has_option_string(mh, option);
1100 }
1101
1102 // ------------------------------------------------------------------
1103 // ciMethod::can_be_compiled
1104 //
1105 // Have previous compilations of this method succeeded?
1106 bool ciMethod::can_be_compiled() {
1107 check_is_loaded();
1108 ciEnv* env = CURRENT_ENV;
1109 if (is_c1_compile(env->comp_level())) {
1110 return _is_c1_compilable;
1111 }
1112 return _is_c2_compilable;
1113 }
1114
1115 // ------------------------------------------------------------------
1116 // ciMethod::set_not_compilable
1117 //
1118 // Tell the VM that this method cannot be compiled at all.
1119 void ciMethod::set_not_compilable(const char* reason) {
1120 check_is_loaded();
1121 VM_ENTRY_MARK;
1122 ciEnv* env = CURRENT_ENV;
1123 if (is_c1_compile(env->comp_level())) {
1124 _is_c1_compilable = false;
1125 } else {
1126 _is_c2_compilable = false;
1127 }
1128 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1129 }
1130
1131 // ------------------------------------------------------------------
1132 // ciMethod::can_be_osr_compiled
1133 //
1134 // Have previous compilations of this method succeeded?
1135 //
1136 // Implementation note: the VM does not currently keep track
1137 // of failed OSR compilations per bci. The entry_bci parameter
1138 // is currently unused.
1139 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1140 check_is_loaded();
1141 VM_ENTRY_MARK;
1142 ciEnv* env = CURRENT_ENV;
1143 return !get_Method()->is_not_osr_compilable(env->comp_level());
1144 }
1145
1146 // ------------------------------------------------------------------
1147 // ciMethod::has_compiled_code
1148 bool ciMethod::has_compiled_code() {
1149 return instructions_size() > 0;
1150 }
1151
1152 int ciMethod::comp_level() {
1153 check_is_loaded();
1154 VM_ENTRY_MARK;
1155 nmethod* nm = get_Method()->code();
1156 if (nm != NULL) return nm->comp_level();
1157 return 0;
1158 }
1159
1160 int ciMethod::highest_osr_comp_level() {
1161 check_is_loaded();
1162 VM_ENTRY_MARK;
1163 return get_Method()->highest_osr_comp_level();
1164 }
1165
1166 // ------------------------------------------------------------------
1167 // ciMethod::code_size_for_inlining
1168 //
1169 // Code size for inlining decisions. This method returns a code
1170 // size of 1 for methods which has the ForceInline annotation.
1171 int ciMethod::code_size_for_inlining() {
1172 check_is_loaded();
1173 if (get_Method()->force_inline()) {
1174 return 1;
1175 }
1176 return code_size();
1177 }
1178
1179 // ------------------------------------------------------------------
1180 // ciMethod::instructions_size
1181 //
1182 // This is a rough metric for "fat" methods, compared before inlining
1183 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1184 // junk like exception handler, stubs, and constant table, which are
1185 // not highly relevant to an inlined method. So we use the more
1186 // specific accessor nmethod::insts_size.
1187 int ciMethod::instructions_size() {
1188 if (_instructions_size == -1) {
1189 GUARDED_VM_ENTRY(
1190 nmethod* code = get_Method()->code();
1191 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1192 _instructions_size = code->insts_end() - code->verified_entry_point();
1193 } else {
1194 _instructions_size = 0;
1195 }
1196 );
1197 }
1198 return _instructions_size;
1199 }
1200
1201 // ------------------------------------------------------------------
1202 // ciMethod::log_nmethod_identity
1203 void ciMethod::log_nmethod_identity(xmlStream* log) {
1204 GUARDED_VM_ENTRY(
1205 nmethod* code = get_Method()->code();
1206 if (code != NULL) {
1207 code->log_identity(log);
1208 }
1209 )
1210 }
1211
1212 // ------------------------------------------------------------------
1213 // ciMethod::is_not_reached
1214 bool ciMethod::is_not_reached(int bci) {
1215 check_is_loaded();
1216 VM_ENTRY_MARK;
1217 return Interpreter::is_not_reached(
1218 methodHandle(THREAD, get_Method()), bci);
1219 }
1220
1221 // ------------------------------------------------------------------
1222 // ciMethod::was_never_executed
1223 bool ciMethod::was_executed_more_than(int times) {
1224 VM_ENTRY_MARK;
1225 return get_Method()->was_executed_more_than(times);
1226 }
1227
1228 // ------------------------------------------------------------------
1229 // ciMethod::has_unloaded_classes_in_signature
1230 bool ciMethod::has_unloaded_classes_in_signature() {
1231 VM_ENTRY_MARK;
1232 {
1233 EXCEPTION_MARK;
1234 methodHandle m(THREAD, get_Method());
1235 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1236 if( HAS_PENDING_EXCEPTION ) {
1237 CLEAR_PENDING_EXCEPTION;
1238 return true; // Declare that we may have unloaded classes
1239 }
1240 return has_unloaded;
1241 }
1242 }
1243
1244 // ------------------------------------------------------------------
1245 // ciMethod::is_klass_loaded
1246 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1247 VM_ENTRY_MARK;
1248 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1249 }
1250
1251 // ------------------------------------------------------------------
1252 // ciMethod::check_call
1253 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1254 // This method is used only in C2 from InlineTree::ok_to_inline,
1255 // and is only used under -Xcomp or -XX:CompileTheWorld.
1256 // It appears to fail when applied to an invokeinterface call site.
1257 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1258 VM_ENTRY_MARK;
1259 {
1260 EXCEPTION_MARK;
1261 HandleMark hm(THREAD);
1262 constantPoolHandle pool (THREAD, get_Method()->constants());
1263 methodHandle spec_method;
1264 KlassHandle spec_klass;
1265 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1266 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
1267 if (HAS_PENDING_EXCEPTION) {
1268 CLEAR_PENDING_EXCEPTION;
1269 return false;
1270 } else {
1271 return (spec_method->is_static() == is_static);
1272 }
1273 }
1274 return false;
1275 }
1276
1277 // ------------------------------------------------------------------
1278 // ciMethod::print_codes
1279 //
1280 // Print the bytecodes for this method.
1281 void ciMethod::print_codes_on(outputStream* st) {
1282 check_is_loaded();
1283 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1284 }
1285
1286
1287 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1288 check_is_loaded(); \
1289 VM_ENTRY_MARK; \
1290 return get_Method()->flag_accessor(); \
1291 }
1292
1293 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1294 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1295 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1296 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1297 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1298 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1299
1300 bool ciMethod::is_boxing_method() const {
1301 if (holder()->is_box_klass()) {
1302 switch (intrinsic_id()) {
1303 case vmIntrinsics::_Boolean_valueOf:
1304 case vmIntrinsics::_Byte_valueOf:
1305 case vmIntrinsics::_Character_valueOf:
1306 case vmIntrinsics::_Short_valueOf:
1307 case vmIntrinsics::_Integer_valueOf:
1308 case vmIntrinsics::_Long_valueOf:
1309 case vmIntrinsics::_Float_valueOf:
1310 case vmIntrinsics::_Double_valueOf:
1311 return true;
1312 default:
1313 return false;
1314 }
1315 }
1316 return false;
1317 }
1318
1319 bool ciMethod::is_unboxing_method() const {
1320 if (holder()->is_box_klass()) {
1321 switch (intrinsic_id()) {
1322 case vmIntrinsics::_booleanValue:
1323 case vmIntrinsics::_byteValue:
1324 case vmIntrinsics::_charValue:
1325 case vmIntrinsics::_shortValue:
1326 case vmIntrinsics::_intValue:
1327 case vmIntrinsics::_longValue:
1328 case vmIntrinsics::_floatValue:
1329 case vmIntrinsics::_doubleValue:
1330 return true;
1331 default:
1332 return false;
1333 }
1334 }
1335 return false;
1336 }
1337
1338 BCEscapeAnalyzer *ciMethod::get_bcea() {
1339 #ifdef COMPILER2
1340 if (_bcea == NULL) {
1341 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1342 }
1343 return _bcea;
1344 #else // COMPILER2
1345 ShouldNotReachHere();
1346 return NULL;
1347 #endif // COMPILER2
1348 }
1349
1350 ciMethodBlocks *ciMethod::get_method_blocks() {
1351 Arena *arena = CURRENT_ENV->arena();
1352 if (_method_blocks == NULL) {
1353 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1354 }
1355 return _method_blocks;
1356 }
1357
1358 #undef FETCH_FLAG_FROM_VM
1359
1360 void ciMethod::dump_replay_data(outputStream* st) {
1361 ResourceMark rm;
1362 Method* method = get_Method();
1363 MethodCounters* mcs = method->method_counters();
1364 Klass* holder = method->method_holder();
1365 st->print_cr("ciMethod %s %s %s %d %d %d %d %d",
1366 holder->name()->as_quoted_ascii(),
1367 method->name()->as_quoted_ascii(),
1368 method->signature()->as_quoted_ascii(),
1369 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1370 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1371 interpreter_invocation_count(),
1372 interpreter_throwout_count(),
1373 _instructions_size);
1374 }
1375
1376 // ------------------------------------------------------------------
1377 // ciMethod::print_codes
1378 //
1379 // Print a range of the bytecodes for this method.
1380 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1381 check_is_loaded();
1382 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1383 }
1384
1385 // ------------------------------------------------------------------
1386 // ciMethod::print_name
1387 //
1388 // Print the name of this method, including signature and some flags.
1389 void ciMethod::print_name(outputStream* st) {
1390 check_is_loaded();
1391 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1392 }
1393
1394 // ------------------------------------------------------------------
1395 // ciMethod::print_short_name
1396 //
1397 // Print the name of this method, without signature.
1398 void ciMethod::print_short_name(outputStream* st) {
1399 if (is_loaded()) {
1400 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1401 } else {
1402 // Fall back if method is not loaded.
1403 holder()->print_name_on(st);
1404 st->print("::");
1405 name()->print_symbol_on(st);
1406 if (WizardMode)
1407 signature()->as_symbol()->print_symbol_on(st);
1408 }
1409 }
1410
1411 // ------------------------------------------------------------------
1412 // ciMethod::print_impl
1413 //
1414 // Implementation of the print method.
1415 void ciMethod::print_impl(outputStream* st) {
1416 ciMetadata::print_impl(st);
1417 st->print(" name=");
1418 name()->print_symbol_on(st);
1419 st->print(" holder=");
1420 holder()->print_name_on(st);
1421 st->print(" signature=");
1422 signature()->as_symbol()->print_symbol_on(st);
1423 if (is_loaded()) {
1424 st->print(" loaded=true");
1425 st->print(" arg_size=%d", arg_size());
1426 st->print(" flags=");
1427 flags().print_member_flags(st);
1428 } else {
1429 st->print(" loaded=false");
1430 }
1431 }