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 [in]bci bci of the call
586 * @param [in]i argument number
587 * @param [out]type profiled type of argument, NULL if none
588 * @param [out]maybe_null true if null was seen for argument
589 * @return true if profiling exists
590 *
591 */
592 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) {
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 false;
601 }
602 type = call->valid_argument_type(i);
603 maybe_null = call->argument_maybe_null(i);
604 return true;
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 false;
610 }
611 type = call->valid_argument_type(i);
612 maybe_null = call->argument_maybe_null(i);
613 return true;
614 }
615 }
616 }
617 return false;
618 }
619
620 /**
621 * Check whether profiling provides a type for the return value from
622 * the call at bci bci
623 *
624 * @param [in]bci bci of the call
625 * @param [out]type profiled type of argument, NULL if none
626 * @param [out]maybe_null true if null was seen for argument
627 * @return true if profiling exists
628 *
629 */
630 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
631 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
632 ciProfileData* data = method_data()->bci_to_data(bci);
633 if (data != NULL) {
634 if (data->is_VirtualCallTypeData()) {
635 assert_virtual_call_type_ok(bci);
636 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
637 type = call->valid_return_type();
638 maybe_null = call->return_maybe_null();
639 return true;
640 } else if (data->is_CallTypeData()) {
641 assert_call_type_ok(bci);
642 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
643 type = call->valid_return_type();
644 maybe_null = call->return_maybe_null();
645 return true;
646 }
647 }
648 }
649 return false;
650 }
651
652 /**
653 * Check whether profiling provides a type for the parameter i
654 *
655 * @param [in]i parameter number
656 * @param [out]type profiled type of parameter, NULL if none
657 * @param [out]maybe_null true if null was seen for parameter
658 * @return true if profiling exists
659 *
660 */
661 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
662 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
663 ciParametersTypeData* parameters = method_data()->parameters_type_data();
664 if (parameters != NULL && i < parameters->number_of_parameters()) {
665 type = parameters->valid_parameter_type(i);
666 maybe_null = parameters->parameter_maybe_null(i);
667 return true;
668 }
669 }
670 return false;
671 }
672
673
674 // ------------------------------------------------------------------
675 // ciMethod::find_monomorphic_target
676 //
677 // Given a certain calling environment, find the monomorphic target
678 // for the call. Return NULL if the call is not monomorphic in
679 // its calling environment, or if there are only abstract methods.
680 // The returned method is never abstract.
681 // Note: If caller uses a non-null result, it must inform dependencies
682 // via assert_unique_concrete_method or assert_leaf_type.
683 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
684 ciInstanceKlass* callee_holder,
685 ciInstanceKlass* actual_recv) {
686 check_is_loaded();
687
688 if (actual_recv->is_interface()) {
689 // %%% We cannot trust interface types, yet. See bug 6312651.
690 return NULL;
691 }
692
693 ciMethod* root_m = resolve_invoke(caller, actual_recv);
694 if (root_m == NULL) {
695 // Something went wrong looking up the actual receiver method.
696 return NULL;
697 }
698 assert(!root_m->is_abstract(), "resolve_invoke promise");
699
700 // Make certain quick checks even if UseCHA is false.
701
702 // Is it private or final?
703 if (root_m->can_be_statically_bound()) {
704 return root_m;
705 }
706
707 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
708 // Easy case. There is no other place to put a method, so don't bother
709 // to go through the VM_ENTRY_MARK and all the rest.
710 return root_m;
711 }
712
713 // Array methods (clone, hashCode, etc.) are always statically bound.
714 // If we were to see an array type here, we'd return root_m.
715 // However, this method processes only ciInstanceKlasses. (See 4962591.)
716 // The inline_native_clone intrinsic narrows Object to T[] properly,
717 // so there is no need to do the same job here.
718
719 if (!UseCHA) return NULL;
720
721 VM_ENTRY_MARK;
722
723 // Disable CHA for default methods for now
724 if (root_m->get_Method()->is_default_method()) {
725 return NULL;
726 }
727
728 methodHandle target;
729 {
730 MutexLocker locker(Compile_lock);
731 Klass* context = actual_recv->get_Klass();
732 target = Dependencies::find_unique_concrete_method(context,
733 root_m->get_Method());
734 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
735 }
736
737 #ifndef PRODUCT
738 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
739 tty->print("found a non-root unique target method");
740 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
741 tty->print(" method = ");
742 target->print_short_name(tty);
743 tty->cr();
744 }
745 #endif //PRODUCT
746
747 if (target() == NULL) {
748 return NULL;
749 }
750 if (target() == root_m->get_Method()) {
751 return root_m;
752 }
753 if (!root_m->is_public() &&
754 !root_m->is_protected()) {
755 // If we are going to reason about inheritance, it's easiest
756 // if the method in question is public, protected, or private.
757 // If the answer is not root_m, it is conservatively correct
758 // to return NULL, even if the CHA encountered irrelevant
759 // methods in other packages.
760 // %%% TO DO: Work out logic for package-private methods
761 // with the same name but different vtable indexes.
762 return NULL;
763 }
764 return CURRENT_THREAD_ENV->get_method(target());
765 }
766
767 // ------------------------------------------------------------------
768 // ciMethod::resolve_invoke
769 //
770 // Given a known receiver klass, find the target for the call.
771 // Return NULL if the call has no target or the target is abstract.
772 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
773 check_is_loaded();
774 VM_ENTRY_MARK;
775
776 KlassHandle caller_klass (THREAD, caller->get_Klass());
777 KlassHandle h_recv (THREAD, exact_receiver->get_Klass());
778 KlassHandle h_resolved (THREAD, holder()->get_Klass());
779 Symbol* h_name = name()->get_symbol();
780 Symbol* h_signature = signature()->get_symbol();
781
782 methodHandle m;
783 // Only do exact lookup if receiver klass has been linked. Otherwise,
784 // the vtable has not been setup, and the LinkResolver will fail.
785 if (h_recv->oop_is_array()
786 ||
787 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
788 if (holder()->is_interface()) {
789 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
790 } else {
791 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
792 }
793 }
794
795 if (m.is_null()) {
796 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
797 return NULL;
798 }
799
800 ciMethod* result = this;
801 if (m() != get_Method()) {
802 result = CURRENT_THREAD_ENV->get_method(m());
803 }
804
805 // Don't return abstract methods because they aren't
806 // optimizable or interesting.
807 if (result->is_abstract()) {
808 return NULL;
809 } else {
810 return result;
811 }
812 }
813
814 // ------------------------------------------------------------------
815 // ciMethod::resolve_vtable_index
816 //
817 // Given a known receiver klass, find the vtable index for the call.
818 // Return Method::invalid_vtable_index if the vtable_index is unknown.
819 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
820 check_is_loaded();
821
822 int vtable_index = Method::invalid_vtable_index;
823 // Only do lookup if receiver klass has been linked. Otherwise,
824 // the vtable has not been setup, and the LinkResolver will fail.
825 if (!receiver->is_interface()
826 && (!receiver->is_instance_klass() ||
827 receiver->as_instance_klass()->is_linked())) {
828 VM_ENTRY_MARK;
829
830 KlassHandle caller_klass (THREAD, caller->get_Klass());
831 KlassHandle h_recv (THREAD, receiver->get_Klass());
832 Symbol* h_name = name()->get_symbol();
833 Symbol* h_signature = signature()->get_symbol();
834
835 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
836 if (vtable_index == Method::nonvirtual_vtable_index) {
837 // A statically bound method. Return "no such index".
838 vtable_index = Method::invalid_vtable_index;
839 }
840 }
841
842 return vtable_index;
843 }
844
845 // ------------------------------------------------------------------
846 // ciMethod::interpreter_call_site_count
847 int ciMethod::interpreter_call_site_count(int bci) {
848 if (method_data() != NULL) {
849 ResourceMark rm;
850 ciProfileData* data = method_data()->bci_to_data(bci);
851 if (data != NULL && data->is_CounterData()) {
852 return scale_count(data->as_CounterData()->count());
853 }
854 }
855 return -1; // unknown
856 }
857
858 // ------------------------------------------------------------------
859 // ciMethod::get_field_at_bci
860 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
861 ciBytecodeStream iter(this);
862 iter.reset_to_bci(bci);
863 iter.next();
864 return iter.get_field(will_link);
865 }
866
867 // ------------------------------------------------------------------
868 // ciMethod::get_method_at_bci
869 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
870 ciBytecodeStream iter(this);
871 iter.reset_to_bci(bci);
872 iter.next();
873 return iter.get_method(will_link, declared_signature);
874 }
875
876 // ------------------------------------------------------------------
877 // Adjust a CounterData count to be commensurate with
878 // interpreter_invocation_count. If the MDO exists for
879 // only 25% of the time the method exists, then the
880 // counts in the MDO should be scaled by 4X, so that
881 // they can be usefully and stably compared against the
882 // invocation counts in methods.
883 int ciMethod::scale_count(int count, float prof_factor) {
884 if (count > 0 && method_data() != NULL) {
885 int counter_life;
886 int method_life = interpreter_invocation_count();
887 if (TieredCompilation) {
888 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
889 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
890 } else {
891 int current_mileage = method_data()->current_mileage();
892 int creation_mileage = method_data()->creation_mileage();
893 counter_life = current_mileage - creation_mileage;
894 }
895
896 // counter_life due to backedge_counter could be > method_life
897 if (counter_life > method_life)
898 counter_life = method_life;
899 if (0 < counter_life && counter_life <= method_life) {
900 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
901 count = (count > 0) ? count : 1;
902 }
903 }
904 return count;
905 }
906
907
908 // ------------------------------------------------------------------
909 // ciMethod::is_special_get_caller_class_method
910 //
911 bool ciMethod::is_ignored_by_security_stack_walk() const {
912 check_is_loaded();
913 VM_ENTRY_MARK;
914 return get_Method()->is_ignored_by_security_stack_walk();
915 }
916
917
918 // ------------------------------------------------------------------
919 // invokedynamic support
920
921 // ------------------------------------------------------------------
922 // ciMethod::is_method_handle_intrinsic
923 //
924 // Return true if the method is an instance of the JVM-generated
925 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
926 bool ciMethod::is_method_handle_intrinsic() const {
927 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
928 return (MethodHandles::is_signature_polymorphic(iid) &&
929 MethodHandles::is_signature_polymorphic_intrinsic(iid));
930 }
931
932 // ------------------------------------------------------------------
933 // ciMethod::is_compiled_lambda_form
934 //
935 // Return true if the method is a generated MethodHandle adapter.
936 // These are built by Java code.
937 bool ciMethod::is_compiled_lambda_form() const {
938 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
939 return iid == vmIntrinsics::_compiledLambdaForm;
940 }
941
942 // ------------------------------------------------------------------
943 // ciMethod::has_member_arg
944 //
945 // Return true if the method is a linker intrinsic like _linkToVirtual.
946 // These are built by the JVM.
947 bool ciMethod::has_member_arg() const {
948 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
949 return (MethodHandles::is_signature_polymorphic(iid) &&
950 MethodHandles::has_member_arg(iid));
951 }
952
953 // ------------------------------------------------------------------
954 // ciMethod::ensure_method_data
955 //
956 // Generate new MethodData* objects at compile time.
957 // Return true if allocation was successful or no MDO is required.
958 bool ciMethod::ensure_method_data(methodHandle h_m) {
959 EXCEPTION_CONTEXT;
960 if (is_native() || is_abstract() || h_m()->is_accessor()) {
961 return true;
962 }
963 if (h_m()->method_data() == NULL) {
964 Method::build_interpreter_method_data(h_m, THREAD);
965 if (HAS_PENDING_EXCEPTION) {
966 CLEAR_PENDING_EXCEPTION;
967 }
968 }
969 if (h_m()->method_data() != NULL) {
970 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
971 _method_data->load_data();
972 return true;
973 } else {
974 _method_data = CURRENT_ENV->get_empty_methodData();
975 return false;
976 }
977 }
978
979 // public, retroactive version
980 bool ciMethod::ensure_method_data() {
981 bool result = true;
982 if (_method_data == NULL || _method_data->is_empty()) {
983 GUARDED_VM_ENTRY({
984 result = ensure_method_data(get_Method());
985 });
986 }
987 return result;
988 }
989
990
991 // ------------------------------------------------------------------
992 // ciMethod::method_data
993 //
994 ciMethodData* ciMethod::method_data() {
995 if (_method_data != NULL) {
996 return _method_data;
997 }
998 VM_ENTRY_MARK;
999 ciEnv* env = CURRENT_ENV;
1000 Thread* my_thread = JavaThread::current();
1001 methodHandle h_m(my_thread, get_Method());
1002
1003 if (h_m()->method_data() != NULL) {
1004 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1005 _method_data->load_data();
1006 } else {
1007 _method_data = CURRENT_ENV->get_empty_methodData();
1008 }
1009 return _method_data;
1010
1011 }
1012
1013 // ------------------------------------------------------------------
1014 // ciMethod::method_data_or_null
1015 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1016 // NULL otherwise.
1017 ciMethodData* ciMethod::method_data_or_null() {
1018 ciMethodData *md = method_data();
1019 if (md->is_empty()) {
1020 return NULL;
1021 }
1022 return md;
1023 }
1024
1025 // ------------------------------------------------------------------
1026 // ciMethod::ensure_method_counters
1027 //
1028 MethodCounters* ciMethod::ensure_method_counters() {
1029 check_is_loaded();
1030 VM_ENTRY_MARK;
1031 methodHandle mh(THREAD, get_Method());
1032 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1033 return method_counters;
1034 }
1035
1036 // ------------------------------------------------------------------
1037 // ciMethod::should_exclude
1038 //
1039 // Should this method be excluded from compilation?
1040 bool ciMethod::should_exclude() {
1041 check_is_loaded();
1042 VM_ENTRY_MARK;
1043 methodHandle mh(THREAD, get_Method());
1044 bool ignore;
1045 return CompilerOracle::should_exclude(mh, ignore);
1046 }
1047
1048 // ------------------------------------------------------------------
1049 // ciMethod::should_inline
1050 //
1051 // Should this method be inlined during compilation?
1052 bool ciMethod::should_inline() {
1053 check_is_loaded();
1054 VM_ENTRY_MARK;
1055 methodHandle mh(THREAD, get_Method());
1056 return CompilerOracle::should_inline(mh);
1057 }
1058
1059 // ------------------------------------------------------------------
1060 // ciMethod::should_not_inline
1061 //
1062 // Should this method be disallowed from inlining during compilation?
1063 bool ciMethod::should_not_inline() {
1064 check_is_loaded();
1065 VM_ENTRY_MARK;
1066 methodHandle mh(THREAD, get_Method());
1067 return CompilerOracle::should_not_inline(mh);
1068 }
1069
1070 // ------------------------------------------------------------------
1071 // ciMethod::should_print_assembly
1072 //
1073 // Should the compiler print the generated code for this method?
1074 bool ciMethod::should_print_assembly() {
1075 check_is_loaded();
1076 VM_ENTRY_MARK;
1077 methodHandle mh(THREAD, get_Method());
1078 return CompilerOracle::should_print(mh);
1079 }
1080
1081 // ------------------------------------------------------------------
1082 // ciMethod::break_at_execute
1083 //
1084 // Should the compiler insert a breakpoint into the generated code
1085 // method?
1086 bool ciMethod::break_at_execute() {
1087 check_is_loaded();
1088 VM_ENTRY_MARK;
1089 methodHandle mh(THREAD, get_Method());
1090 return CompilerOracle::should_break_at(mh);
1091 }
1092
1093 // ------------------------------------------------------------------
1094 // ciMethod::has_option
1095 //
1096 bool ciMethod::has_option(const char* option) {
1097 check_is_loaded();
1098 VM_ENTRY_MARK;
1099 methodHandle mh(THREAD, get_Method());
1100 return CompilerOracle::has_option_string(mh, option);
1101 }
1102
1103 // ------------------------------------------------------------------
1104 // ciMethod::can_be_compiled
1105 //
1106 // Have previous compilations of this method succeeded?
1107 bool ciMethod::can_be_compiled() {
1108 check_is_loaded();
1109 ciEnv* env = CURRENT_ENV;
1110 if (is_c1_compile(env->comp_level())) {
1111 return _is_c1_compilable;
1112 }
1113 return _is_c2_compilable;
1114 }
1115
1116 // ------------------------------------------------------------------
1117 // ciMethod::set_not_compilable
1118 //
1119 // Tell the VM that this method cannot be compiled at all.
1120 void ciMethod::set_not_compilable(const char* reason) {
1121 check_is_loaded();
1122 VM_ENTRY_MARK;
1123 ciEnv* env = CURRENT_ENV;
1124 if (is_c1_compile(env->comp_level())) {
1125 _is_c1_compilable = false;
1126 } else {
1127 _is_c2_compilable = false;
1128 }
1129 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1130 }
1131
1132 // ------------------------------------------------------------------
1133 // ciMethod::can_be_osr_compiled
1134 //
1135 // Have previous compilations of this method succeeded?
1136 //
1137 // Implementation note: the VM does not currently keep track
1138 // of failed OSR compilations per bci. The entry_bci parameter
1139 // is currently unused.
1140 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1141 check_is_loaded();
1142 VM_ENTRY_MARK;
1143 ciEnv* env = CURRENT_ENV;
1144 return !get_Method()->is_not_osr_compilable(env->comp_level());
1145 }
1146
1147 // ------------------------------------------------------------------
1148 // ciMethod::has_compiled_code
1149 bool ciMethod::has_compiled_code() {
1150 return instructions_size() > 0;
1151 }
1152
1153 int ciMethod::comp_level() {
1154 check_is_loaded();
1155 VM_ENTRY_MARK;
1156 nmethod* nm = get_Method()->code();
1157 if (nm != NULL) return nm->comp_level();
1158 return 0;
1159 }
1160
1161 int ciMethod::highest_osr_comp_level() {
1162 check_is_loaded();
1163 VM_ENTRY_MARK;
1164 return get_Method()->highest_osr_comp_level();
1165 }
1166
1167 // ------------------------------------------------------------------
1168 // ciMethod::code_size_for_inlining
1169 //
1170 // Code size for inlining decisions. This method returns a code
1171 // size of 1 for methods which has the ForceInline annotation.
1172 int ciMethod::code_size_for_inlining() {
1173 check_is_loaded();
1174 if (get_Method()->force_inline()) {
1175 return 1;
1176 }
1177 return code_size();
1178 }
1179
1180 // ------------------------------------------------------------------
1181 // ciMethod::instructions_size
1182 //
1183 // This is a rough metric for "fat" methods, compared before inlining
1184 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1185 // junk like exception handler, stubs, and constant table, which are
1186 // not highly relevant to an inlined method. So we use the more
1187 // specific accessor nmethod::insts_size.
1188 int ciMethod::instructions_size() {
1189 if (_instructions_size == -1) {
1190 GUARDED_VM_ENTRY(
1191 nmethod* code = get_Method()->code();
1192 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1193 _instructions_size = code->insts_end() - code->verified_entry_point();
1194 } else {
1195 _instructions_size = 0;
1196 }
1197 );
1198 }
1199 return _instructions_size;
1200 }
1201
1202 // ------------------------------------------------------------------
1203 // ciMethod::log_nmethod_identity
1204 void ciMethod::log_nmethod_identity(xmlStream* log) {
1205 GUARDED_VM_ENTRY(
1206 nmethod* code = get_Method()->code();
1207 if (code != NULL) {
1208 code->log_identity(log);
1209 }
1210 )
1211 }
1212
1213 // ------------------------------------------------------------------
1214 // ciMethod::is_not_reached
1215 bool ciMethod::is_not_reached(int bci) {
1216 check_is_loaded();
1217 VM_ENTRY_MARK;
1218 return Interpreter::is_not_reached(
1219 methodHandle(THREAD, get_Method()), bci);
1220 }
1221
1222 // ------------------------------------------------------------------
1223 // ciMethod::was_never_executed
1224 bool ciMethod::was_executed_more_than(int times) {
1225 VM_ENTRY_MARK;
1226 return get_Method()->was_executed_more_than(times);
1227 }
1228
1229 // ------------------------------------------------------------------
1230 // ciMethod::has_unloaded_classes_in_signature
1231 bool ciMethod::has_unloaded_classes_in_signature() {
1232 VM_ENTRY_MARK;
1233 {
1234 EXCEPTION_MARK;
1235 methodHandle m(THREAD, get_Method());
1236 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1237 if( HAS_PENDING_EXCEPTION ) {
1238 CLEAR_PENDING_EXCEPTION;
1239 return true; // Declare that we may have unloaded classes
1240 }
1241 return has_unloaded;
1242 }
1243 }
1244
1245 // ------------------------------------------------------------------
1246 // ciMethod::is_klass_loaded
1247 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1248 VM_ENTRY_MARK;
1249 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1250 }
1251
1252 // ------------------------------------------------------------------
1253 // ciMethod::check_call
1254 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1255 // This method is used only in C2 from InlineTree::ok_to_inline,
1256 // and is only used under -Xcomp or -XX:CompileTheWorld.
1257 // It appears to fail when applied to an invokeinterface call site.
1258 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1259 VM_ENTRY_MARK;
1260 {
1261 EXCEPTION_MARK;
1262 HandleMark hm(THREAD);
1263 constantPoolHandle pool (THREAD, get_Method()->constants());
1264 methodHandle spec_method;
1265 KlassHandle spec_klass;
1266 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1267 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
1268 if (HAS_PENDING_EXCEPTION) {
1269 CLEAR_PENDING_EXCEPTION;
1270 return false;
1271 } else {
1272 return (spec_method->is_static() == is_static);
1273 }
1274 }
1275 return false;
1276 }
1277
1278 // ------------------------------------------------------------------
1279 // ciMethod::print_codes
1280 //
1281 // Print the bytecodes for this method.
1282 void ciMethod::print_codes_on(outputStream* st) {
1283 check_is_loaded();
1284 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1285 }
1286
1287
1288 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1289 check_is_loaded(); \
1290 VM_ENTRY_MARK; \
1291 return get_Method()->flag_accessor(); \
1292 }
1293
1294 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1295 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1296 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1297 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1298 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1299 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1300
1301 bool ciMethod::is_boxing_method() const {
1302 if (holder()->is_box_klass()) {
1303 switch (intrinsic_id()) {
1304 case vmIntrinsics::_Boolean_valueOf:
1305 case vmIntrinsics::_Byte_valueOf:
1306 case vmIntrinsics::_Character_valueOf:
1307 case vmIntrinsics::_Short_valueOf:
1308 case vmIntrinsics::_Integer_valueOf:
1309 case vmIntrinsics::_Long_valueOf:
1310 case vmIntrinsics::_Float_valueOf:
1311 case vmIntrinsics::_Double_valueOf:
1312 return true;
1313 default:
1314 return false;
1315 }
1316 }
1317 return false;
1318 }
1319
1320 bool ciMethod::is_unboxing_method() const {
1321 if (holder()->is_box_klass()) {
1322 switch (intrinsic_id()) {
1323 case vmIntrinsics::_booleanValue:
1324 case vmIntrinsics::_byteValue:
1325 case vmIntrinsics::_charValue:
1326 case vmIntrinsics::_shortValue:
1327 case vmIntrinsics::_intValue:
1328 case vmIntrinsics::_longValue:
1329 case vmIntrinsics::_floatValue:
1330 case vmIntrinsics::_doubleValue:
1331 return true;
1332 default:
1333 return false;
1334 }
1335 }
1336 return false;
1337 }
1338
1339 BCEscapeAnalyzer *ciMethod::get_bcea() {
1340 #ifdef COMPILER2
1341 if (_bcea == NULL) {
1342 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1343 }
1344 return _bcea;
1345 #else // COMPILER2
1346 ShouldNotReachHere();
1347 return NULL;
1348 #endif // COMPILER2
1349 }
1350
1351 ciMethodBlocks *ciMethod::get_method_blocks() {
1352 Arena *arena = CURRENT_ENV->arena();
1353 if (_method_blocks == NULL) {
1354 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1355 }
1356 return _method_blocks;
1357 }
1358
1359 #undef FETCH_FLAG_FROM_VM
1360
1361 void ciMethod::dump_name_as_ascii(outputStream* st) {
1362 Method* method = get_Method();
1363 st->print("%s %s %s",
1364 method->klass_name()->as_quoted_ascii(),
1365 method->name()->as_quoted_ascii(),
1366 method->signature()->as_quoted_ascii());
1367 }
1368
1369 void ciMethod::dump_replay_data(outputStream* st) {
1370 ResourceMark rm;
1371 Method* method = get_Method();
1372 MethodCounters* mcs = method->method_counters();
1373 st->print("ciMethod ");
1374 dump_name_as_ascii(st);
1375 st->print_cr(" %d %d %d %d %d",
1376 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1377 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1378 interpreter_invocation_count(),
1379 interpreter_throwout_count(),
1380 _instructions_size);
1381 }
1382
1383 // ------------------------------------------------------------------
1384 // ciMethod::print_codes
1385 //
1386 // Print a range of the bytecodes for this method.
1387 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1388 check_is_loaded();
1389 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1390 }
1391
1392 // ------------------------------------------------------------------
1393 // ciMethod::print_name
1394 //
1395 // Print the name of this method, including signature and some flags.
1396 void ciMethod::print_name(outputStream* st) {
1397 check_is_loaded();
1398 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1399 }
1400
1401 // ------------------------------------------------------------------
1402 // ciMethod::print_short_name
1403 //
1404 // Print the name of this method, without signature.
1405 void ciMethod::print_short_name(outputStream* st) {
1406 if (is_loaded()) {
1407 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1408 } else {
1409 // Fall back if method is not loaded.
1410 holder()->print_name_on(st);
1411 st->print("::");
1412 name()->print_symbol_on(st);
1413 if (WizardMode)
1414 signature()->as_symbol()->print_symbol_on(st);
1415 }
1416 }
1417
1418 // ------------------------------------------------------------------
1419 // ciMethod::print_impl
1420 //
1421 // Implementation of the print method.
1422 void ciMethod::print_impl(outputStream* st) {
1423 ciMetadata::print_impl(st);
1424 st->print(" name=");
1425 name()->print_symbol_on(st);
1426 st->print(" holder=");
1427 holder()->print_name_on(st);
1428 st->print(" signature=");
1429 signature()->as_symbol()->print_symbol_on(st);
1430 if (is_loaded()) {
1431 st->print(" loaded=true");
1432 st->print(" arg_size=%d", arg_size());
1433 st->print(" flags=");
1434 flags().print_member_flags(st);
1435 } else {
1436 st->print(" loaded=false");
1437 }
1438 }