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