1 /*
2 * Copyright (c) 1999, 2019, 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.inline.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/methodLiveness.hpp"
39 #include "interpreter/interpreter.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/oopMapCache.hpp"
42 #include "memory/allocation.inline.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "oops/generateOopMap.hpp"
45 #include "oops/method.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "utilities/bitMap.inline.hpp"
51 #include "utilities/xmlstream.hpp"
52 #ifdef COMPILER2
53 #include "ci/bcEscapeAnalyzer.hpp"
54 #include "ci/ciTypeFlow.hpp"
55 #include "oops/method.hpp"
56 #endif
57
58 // ciMethod
59 //
60 // This class represents a Method* in the HotSpot virtual
61 // machine.
62
63
64 // ------------------------------------------------------------------
65 // ciMethod::ciMethod
66 //
67 // Loaded method.
68 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
69 ciMetadata(h_m()),
70 _holder(holder)
71 {
72 assert(h_m() != NULL, "no null method");
73
74 if (LogTouchedMethods) {
75 h_m()->log_touched(Thread::current());
76 }
77 // These fields are always filled in in loaded methods.
78 _flags = ciFlags(h_m()->access_flags());
79
80 // Easy to compute, so fill them in now.
81 _max_stack = h_m()->max_stack();
82 _max_locals = h_m()->max_locals();
83 _code_size = h_m()->code_size();
84 _intrinsic_id = h_m()->intrinsic_id();
85 _handler_count = h_m()->exception_table_length();
86 _size_of_parameters = h_m()->size_of_parameters();
87 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
88 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
89 _is_c1_compilable = !h_m()->is_not_c1_compilable();
90 _is_c2_compilable = !h_m()->is_not_c2_compilable();
91 _can_be_parsed = true;
92 _has_reserved_stack_access = h_m()->has_reserved_stack_access();
93 _is_overpass = h_m()->is_overpass();
94 // Lazy fields, filled in on demand. Require allocation.
95 _code = NULL;
96 _exception_handlers = NULL;
97 _liveness = NULL;
98 _method_blocks = NULL;
99 #if defined(COMPILER2)
100 _flow = NULL;
101 _bcea = NULL;
102 #endif // COMPILER2
103
104 ciEnv *env = CURRENT_ENV;
105 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
106 // 6328518 check hotswap conditions under the right lock.
107 MutexLocker locker(Compile_lock);
108 if (Dependencies::check_evol_method(h_m()) != NULL) {
109 _is_c1_compilable = false;
110 _is_c2_compilable = false;
111 _can_be_parsed = false;
112 }
113 } else {
114 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
115 }
116
117 if (h_m()->method_holder()->is_linked()) {
118 _can_be_statically_bound = h_m()->can_be_statically_bound();
119 } else {
120 // Have to use a conservative value in this case.
121 _can_be_statically_bound = false;
122 }
123
124 // Adjust the definition of this condition to be more useful:
125 // %%% take these conditions into account in vtable generation
126 if (!_can_be_statically_bound && h_m()->is_private())
127 _can_be_statically_bound = true;
128 if (_can_be_statically_bound && h_m()->is_abstract())
129 _can_be_statically_bound = false;
130
131 // generating _signature may allow GC and therefore move m.
132 // These fields are always filled in.
133 _name = env->get_symbol(h_m()->name());
134 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
135 constantPoolHandle cpool = h_m()->constants();
136 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
137 _method_data = NULL;
138 _nmethod_age = h_m()->nmethod_age();
139 // Take a snapshot of these values, so they will be commensurate with the MDO.
140 if (ProfileInterpreter || TieredCompilation) {
141 int invcnt = h_m()->interpreter_invocation_count();
142 // if the value overflowed report it as max int
143 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
144 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
145 } else {
146 _interpreter_invocation_count = 0;
147 _interpreter_throwout_count = 0;
148 }
149 if (_interpreter_invocation_count == 0)
150 _interpreter_invocation_count = 1;
151 _instructions_size = -1;
152 #ifdef ASSERT
153 if (ReplayCompiles) {
154 ciReplay::initialize(this);
155 }
156 #endif
157 }
158
159
160 // ------------------------------------------------------------------
161 // ciMethod::ciMethod
162 //
163 // Unloaded method.
164 ciMethod::ciMethod(ciInstanceKlass* holder,
165 ciSymbol* name,
166 ciSymbol* signature,
167 ciInstanceKlass* accessor) :
168 ciMetadata((Metadata*)NULL),
169 _name( name),
170 _holder( holder),
171 _method_data( NULL),
172 _method_blocks( NULL),
173 _intrinsic_id( vmIntrinsics::_none),
174 _instructions_size(-1),
175 _can_be_statically_bound(false),
176 _liveness( NULL)
177 #if defined(COMPILER2)
178 ,
179 _flow( NULL),
180 _bcea( NULL)
181 #endif // COMPILER2
182 {
183 // Usually holder and accessor are the same type but in some cases
184 // the holder has the wrong class loader (e.g. invokedynamic call
185 // sites) so we pass the accessor.
186 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
187 }
188
189
190 // ------------------------------------------------------------------
191 // ciMethod::load_code
192 //
193 // Load the bytecodes and exception handler table for this method.
194 void ciMethod::load_code() {
195 VM_ENTRY_MARK;
196 assert(is_loaded(), "only loaded methods have code");
197
198 Method* me = get_Method();
199 Arena* arena = CURRENT_THREAD_ENV->arena();
200
201 // Load the bytecodes.
202 _code = (address)arena->Amalloc(code_size());
203 memcpy(_code, me->code_base(), code_size());
204
205 #if INCLUDE_JVMTI
206 // Revert any breakpoint bytecodes in ci's copy
207 if (me->number_of_breakpoints() > 0) {
208 BreakpointInfo* bp = me->method_holder()->breakpoints();
209 for (; bp != NULL; bp = bp->next()) {
210 if (bp->match(me)) {
211 code_at_put(bp->bci(), bp->orig_bytecode());
212 }
213 }
214 }
215 #endif
216
217 // And load the exception table.
218 ExceptionTable exc_table(me);
219
220 // Allocate one extra spot in our list of exceptions. This
221 // last entry will be used to represent the possibility that
222 // an exception escapes the method. See ciExceptionHandlerStream
223 // for details.
224 _exception_handlers =
225 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
226 * (_handler_count + 1));
227 if (_handler_count > 0) {
228 for (int i=0; i<_handler_count; i++) {
229 _exception_handlers[i] = new (arena) ciExceptionHandler(
230 holder(),
231 /* start */ exc_table.start_pc(i),
232 /* limit */ exc_table.end_pc(i),
233 /* goto pc */ exc_table.handler_pc(i),
234 /* cp index */ exc_table.catch_type_index(i));
235 }
236 }
237
238 // Put an entry at the end of our list to represent the possibility
239 // of exceptional exit.
240 _exception_handlers[_handler_count] =
241 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
242
243 if (CIPrintMethodCodes) {
244 print_codes();
245 }
246 }
247
248
249 // ------------------------------------------------------------------
250 // ciMethod::has_linenumber_table
251 //
252 // length unknown until decompression
253 bool ciMethod::has_linenumber_table() const {
254 check_is_loaded();
255 VM_ENTRY_MARK;
256 return get_Method()->has_linenumber_table();
257 }
258
259
260 // ------------------------------------------------------------------
261 // ciMethod::compressed_linenumber_table
262 u_char* ciMethod::compressed_linenumber_table() const {
263 check_is_loaded();
264 VM_ENTRY_MARK;
265 return get_Method()->compressed_linenumber_table();
266 }
267
268
269 // ------------------------------------------------------------------
270 // ciMethod::line_number_from_bci
271 int ciMethod::line_number_from_bci(int bci) const {
272 check_is_loaded();
273 VM_ENTRY_MARK;
274 return get_Method()->line_number_from_bci(bci);
275 }
276
277
278 // ------------------------------------------------------------------
279 // ciMethod::vtable_index
280 //
281 // Get the position of this method's entry in the vtable, if any.
282 int ciMethod::vtable_index() {
283 check_is_loaded();
284 assert(holder()->is_linked(), "must be linked");
285 VM_ENTRY_MARK;
286 return get_Method()->vtable_index();
287 }
288
289
290 // ------------------------------------------------------------------
291 // ciMethod::native_entry
292 //
293 // Get the address of this method's native code, if any.
294 address ciMethod::native_entry() {
295 check_is_loaded();
296 assert(flags().is_native(), "must be native method");
297 VM_ENTRY_MARK;
298 Method* method = get_Method();
299 address entry = method->native_function();
300 assert(entry != NULL, "must be valid entry point");
301 return entry;
302 }
303
304
305 // ------------------------------------------------------------------
306 // ciMethod::interpreter_entry
307 //
308 // Get the entry point for running this method in the interpreter.
309 address ciMethod::interpreter_entry() {
310 check_is_loaded();
311 VM_ENTRY_MARK;
312 methodHandle mh(THREAD, get_Method());
313 return Interpreter::entry_for_method(mh);
314 }
315
316
317 // ------------------------------------------------------------------
318 // ciMethod::uses_balanced_monitors
319 //
320 // Does this method use monitors in a strict stack-disciplined manner?
321 bool ciMethod::has_balanced_monitors() {
322 check_is_loaded();
323 if (_balanced_monitors) return true;
324
325 // Analyze the method to see if monitors are used properly.
326 VM_ENTRY_MARK;
327 methodHandle method(THREAD, get_Method());
328 assert(method->has_monitor_bytecodes(), "should have checked this");
329
330 // Check to see if a previous compilation computed the
331 // monitor-matching analysis.
332 if (method->guaranteed_monitor_matching()) {
333 _balanced_monitors = true;
334 return true;
335 }
336
337 {
338 EXCEPTION_MARK;
339 ResourceMark rm(THREAD);
340 GeneratePairingInfo gpi(method);
341 gpi.compute_map(CATCH);
342 if (!gpi.monitor_safe()) {
343 return false;
344 }
345 method->set_guaranteed_monitor_matching();
346 _balanced_monitors = true;
347 }
348 return true;
349 }
350
351
352 // ------------------------------------------------------------------
353 // ciMethod::get_flow_analysis
354 ciTypeFlow* ciMethod::get_flow_analysis() {
355 #if defined(COMPILER2)
356 if (_flow == NULL) {
357 ciEnv* env = CURRENT_ENV;
358 _flow = new (env->arena()) ciTypeFlow(env, this);
359 _flow->do_flow();
360 }
361 return _flow;
362 #else // COMPILER2
363 ShouldNotReachHere();
364 return NULL;
365 #endif // COMPILER2
366 }
367
368
369 // ------------------------------------------------------------------
370 // ciMethod::get_osr_flow_analysis
371 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
372 #if defined(COMPILER2)
373 // OSR entry points are always place after a call bytecode of some sort
374 assert(osr_bci >= 0, "must supply valid OSR entry point");
375 ciEnv* env = CURRENT_ENV;
376 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
377 flow->do_flow();
378 return flow;
379 #else // COMPILER2
380 ShouldNotReachHere();
381 return NULL;
382 #endif // COMPILER2
383 }
384
385 // ------------------------------------------------------------------
386 // ciMethod::raw_liveness_at_bci
387 //
388 // Which local variables are live at a specific bci?
389 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
390 check_is_loaded();
391 if (_liveness == NULL) {
392 // Create the liveness analyzer.
393 Arena* arena = CURRENT_ENV->arena();
394 _liveness = new (arena) MethodLiveness(arena, this);
395 _liveness->compute_liveness();
396 }
397 return _liveness->get_liveness_at(bci);
398 }
399
400 // ------------------------------------------------------------------
401 // ciMethod::liveness_at_bci
402 //
403 // Which local variables are live at a specific bci? When debugging
404 // will return true for all locals in some cases to improve debug
405 // information.
406 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
407 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
408 // Keep all locals live for the user's edification and amusement.
409 MethodLivenessResult result(_max_locals);
410 result.set_range(0, _max_locals);
411 result.set_is_valid();
412 return result;
413 }
414 return raw_liveness_at_bci(bci);
415 }
416
417 // ciMethod::live_local_oops_at_bci
418 //
419 // find all the live oops in the locals array for a particular bci
420 // Compute what the interpreter believes by using the interpreter
421 // oopmap generator. This is used as a double check during osr to
422 // guard against conservative result from MethodLiveness making us
423 // think a dead oop is live. MethodLiveness is conservative in the
424 // sense that it may consider locals to be live which cannot be live,
425 // like in the case where a local could contain an oop or a primitive
426 // along different paths. In that case the local must be dead when
427 // those paths merge. Since the interpreter's viewpoint is used when
428 // gc'ing an interpreter frame we need to use its viewpoint during
429 // OSR when loading the locals.
430
431 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
432 VM_ENTRY_MARK;
433 InterpreterOopMap mask;
434 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
435 int mask_size = max_locals();
436 ResourceBitMap result(mask_size);
437 int i;
438 for (i = 0; i < mask_size ; i++ ) {
439 if (mask.is_oop(i)) result.set_bit(i);
440 }
441 return result;
442 }
443
444
445 #ifdef COMPILER1
446 // ------------------------------------------------------------------
447 // ciMethod::bci_block_start
448 //
449 // Marks all bcis where a new basic block starts
450 const BitMap& ciMethod::bci_block_start() {
451 check_is_loaded();
452 if (_liveness == NULL) {
453 // Create the liveness analyzer.
454 Arena* arena = CURRENT_ENV->arena();
455 _liveness = new (arena) MethodLiveness(arena, this);
456 _liveness->compute_liveness();
457 }
458
459 return _liveness->get_bci_block_start();
460 }
461 #endif // COMPILER1
462
463
464 // ------------------------------------------------------------------
465 // ciMethod::saturated_add
466 //
467 // Update profile counters with saturating addition
468 // Wil check and handle the overflow condition
469 template <typename L, typename R>
470 int ciMethod::saturated_add(L a, R b) {
471 jlong src1 = a;
472 jlong src2 = b;
473 jlong sum = src1 + src2;
474 if (sum > max_jint) {
475 sum = max_jint;
476 } else if (sum < min_jint) {
477 sum = min_jint;
478 }
479
480 return (int)sum;
481 }
482
483
484 // ------------------------------------------------------------------
485 // ciMethod::call_profile_at_bci
486 //
487 // Get the ciCallProfile for the invocation of this method.
488 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
489 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
490 ResourceMark rm;
491 ciCallProfile result;
492 if (method_data() != NULL && method_data()->is_mature()) {
493 ciProfileData* data = method_data()->bci_to_data(bci);
494 if (data != NULL && data->is_CounterData()) {
495 // Every profiled call site has a counter.
496 int count = data->as_CounterData()->count();
497
498 if (!data->is_ReceiverTypeData()) {
499 result._receiver_count[0] = 0; // that's a definite zero
500 } else { // ReceiverTypeData is a subclass of CounterData
501 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
502 // In addition, virtual call sites have receiver type information
503 int receivers_count_total = 0;
504 int morphism = 0;
505 // Precompute morphism for the possible fixup
506 for (uint i = 0; i < call->row_limit(); i++) {
507 ciKlass* receiver = call->receiver(i);
508 if (receiver == NULL) continue;
509 morphism++;
510 }
511 int epsilon = 0;
512 if (TieredCompilation) {
513 // For a call, it is assumed that either the type of the receiver(s)
514 // is recorded or an associated counter is incremented, but not both. With
515 // tiered compilation, however, both can happen due to the interpreter and
516 // C1 profiling invocations differently. Address that inconsistency here.
517 if (morphism == 1 && count > 0) {
518 epsilon = count;
519 count = 0;
520 }
521 }
522 for (uint i = 0; i < call->row_limit(); i++) {
523 ciKlass* receiver = call->receiver(i);
524 if (receiver == NULL) continue;
525 int rcount = saturated_add(call->receiver_count(i), epsilon);
526 if (rcount == 0) rcount = 1; // Should be valid value
527 receivers_count_total = saturated_add(receivers_count_total, rcount);
528 // Add the receiver to result data.
529 result.add_receiver(receiver, rcount);
530 // If we extend profiling to record methods,
531 // we will set result._method also.
532 }
533 // Determine call site's morphism.
534 // The call site count is 0 with known morphism (only 1 or 2 receivers)
535 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
536 // The call site count is > 0 in the case of a polymorphic virtual call.
537 if (morphism > 0 && morphism == result._limit) {
538 // The morphism <= MorphismLimit.
539 if ((morphism < ciCallProfile::MorphismLimit) ||
540 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
541 #ifdef ASSERT
542 if (count > 0) {
543 this->print_short_name(tty);
544 tty->print_cr(" @ bci:%d", bci);
545 this->print_codes();
546 assert(false, "this call site should not be polymorphic");
547 }
548 #endif
549 result._morphism = morphism;
550 }
551 }
552 // Make the count consistent if this is a call profile. If count is
553 // zero or less, presume that this is a typecheck profile and
554 // do nothing. Otherwise, increase count to be the sum of all
555 // receiver's counts.
556 if (count >= 0) {
557 count = saturated_add(count, receivers_count_total);
558 }
559 }
560 result._count = count;
561 }
562 }
563 return result;
564 }
565
566 // ------------------------------------------------------------------
567 // Add new receiver and sort data by receiver's profile count.
568 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
569 // Add new receiver and sort data by receiver's counts when we have space
570 // for it otherwise replace the less called receiver (less called receiver
571 // is placed to the last array element which is not used).
572 // First array's element contains most called receiver.
573 int i = _limit;
574 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
575 _receiver[i] = _receiver[i-1];
576 _receiver_count[i] = _receiver_count[i-1];
577 }
578 _receiver[i] = receiver;
579 _receiver_count[i] = receiver_count;
580 if (_limit < MorphismLimit) _limit++;
581 }
582
583
584 void ciMethod::assert_virtual_call_type_ok(int bci) {
585 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
586 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
587 }
588
589 void ciMethod::assert_call_type_ok(int bci) {
590 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
591 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
592 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
593 }
594
595 /**
596 * Check whether profiling provides a type for the argument i to the
597 * call at bci bci
598 *
599 * @param [in]bci bci of the call
600 * @param [in]i argument number
601 * @param [out]type profiled type of argument, NULL if none
602 * @param [out]ptr_kind whether always null, never null or maybe null
603 * @return true if profiling exists
604 *
605 */
606 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
607 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
608 ciProfileData* data = method_data()->bci_to_data(bci);
609 if (data != NULL) {
610 if (data->is_VirtualCallTypeData()) {
611 assert_virtual_call_type_ok(bci);
612 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
613 if (i >= call->number_of_arguments()) {
614 return false;
615 }
616 type = call->valid_argument_type(i);
617 ptr_kind = call->argument_ptr_kind(i);
618 return true;
619 } else if (data->is_CallTypeData()) {
620 assert_call_type_ok(bci);
621 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
622 if (i >= call->number_of_arguments()) {
623 return false;
624 }
625 type = call->valid_argument_type(i);
626 ptr_kind = call->argument_ptr_kind(i);
627 return true;
628 }
629 }
630 }
631 return false;
632 }
633
634 /**
635 * Check whether profiling provides a type for the return value from
636 * the call at bci bci
637 *
638 * @param [in]bci bci of the call
639 * @param [out]type profiled type of argument, NULL if none
640 * @param [out]ptr_kind whether always null, never null or maybe null
641 * @return true if profiling exists
642 *
643 */
644 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
645 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
646 ciProfileData* data = method_data()->bci_to_data(bci);
647 if (data != NULL) {
648 if (data->is_VirtualCallTypeData()) {
649 assert_virtual_call_type_ok(bci);
650 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
651 if (call->has_return()) {
652 type = call->valid_return_type();
653 ptr_kind = call->return_ptr_kind();
654 return true;
655 }
656 } else if (data->is_CallTypeData()) {
657 assert_call_type_ok(bci);
658 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
659 if (call->has_return()) {
660 type = call->valid_return_type();
661 ptr_kind = call->return_ptr_kind();
662 }
663 return true;
664 }
665 }
666 }
667 return false;
668 }
669
670 /**
671 * Check whether profiling provides a type for the parameter i
672 *
673 * @param [in]i parameter number
674 * @param [out]type profiled type of parameter, NULL if none
675 * @param [out]ptr_kind whether always null, never null or maybe null
676 * @return true if profiling exists
677 *
678 */
679 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
680 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
681 ciParametersTypeData* parameters = method_data()->parameters_type_data();
682 if (parameters != NULL && i < parameters->number_of_parameters()) {
683 type = parameters->valid_parameter_type(i);
684 ptr_kind = parameters->parameter_ptr_kind(i);
685 return true;
686 }
687 }
688 return false;
689 }
690
691
692 // ------------------------------------------------------------------
693 // ciMethod::find_monomorphic_target
694 //
695 // Given a certain calling environment, find the monomorphic target
696 // for the call. Return NULL if the call is not monomorphic in
697 // its calling environment, or if there are only abstract methods.
698 // The returned method is never abstract.
699 // Note: If caller uses a non-null result, it must inform dependencies
700 // via assert_unique_concrete_method or assert_leaf_type.
701 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
702 ciInstanceKlass* callee_holder,
703 ciInstanceKlass* actual_recv,
704 bool check_access) {
705 check_is_loaded();
706
707 if (actual_recv->is_interface()) {
708 // %%% We cannot trust interface types, yet. See bug 6312651.
709 return NULL;
710 }
711
712 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
713 if (root_m == NULL) {
714 // Something went wrong looking up the actual receiver method.
715 return NULL;
716 }
717 assert(!root_m->is_abstract(), "resolve_invoke promise");
718
719 // Make certain quick checks even if UseCHA is false.
720
721 // Is it private or final?
722 if (root_m->can_be_statically_bound()) {
723 return root_m;
724 }
725
726 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
727 // Easy case. There is no other place to put a method, so don't bother
728 // to go through the VM_ENTRY_MARK and all the rest.
729 return root_m;
730 }
731
732 // Array methods (clone, hashCode, etc.) are always statically bound.
733 // If we were to see an array type here, we'd return root_m.
734 // However, this method processes only ciInstanceKlasses. (See 4962591.)
735 // The inline_native_clone intrinsic narrows Object to T[] properly,
736 // so there is no need to do the same job here.
737
738 if (!UseCHA) return NULL;
739
740 VM_ENTRY_MARK;
741
742 // Disable CHA for default methods for now
743 if (root_m->is_default_method()) {
744 return NULL;
745 }
746
747 methodHandle target;
748 {
749 MutexLocker locker(Compile_lock);
750 Klass* context = actual_recv->get_Klass();
751 target = Dependencies::find_unique_concrete_method(context,
752 root_m->get_Method());
753 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
754 }
755
756 #ifndef PRODUCT
757 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
758 tty->print("found a non-root unique target method");
759 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
760 tty->print(" method = ");
761 target->print_short_name(tty);
762 tty->cr();
763 }
764 #endif //PRODUCT
765
766 if (target() == NULL) {
767 return NULL;
768 }
769 if (target() == root_m->get_Method()) {
770 return root_m;
771 }
772 if (!root_m->is_public() &&
773 !root_m->is_protected()) {
774 // If we are going to reason about inheritance, it's easiest
775 // if the method in question is public, protected, or private.
776 // If the answer is not root_m, it is conservatively correct
777 // to return NULL, even if the CHA encountered irrelevant
778 // methods in other packages.
779 // %%% TO DO: Work out logic for package-private methods
780 // with the same name but different vtable indexes.
781 return NULL;
782 }
783 assert(!target()->is_abstract(), "not allowed");
784 return CURRENT_THREAD_ENV->get_method(target());
785 }
786
787 // ------------------------------------------------------------------
788 // ciMethod::can_be_statically_bound
789 //
790 // Tries to determine whether a method can be statically bound in some context.
791 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
792 return (holder() == context) && can_be_statically_bound();
793 }
794
795 // ------------------------------------------------------------------
796 // ciMethod::resolve_invoke
797 //
798 // Given a known receiver klass, find the target for the call.
799 // Return NULL if the call has no target or the target is abstract.
800 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
801 check_is_loaded();
802 VM_ENTRY_MARK;
803
804 Klass* caller_klass = caller->get_Klass();
805 Klass* recv = exact_receiver->get_Klass();
806 Klass* resolved = holder()->get_Klass();
807 Symbol* h_name = name()->get_symbol();
808 Symbol* h_signature = signature()->get_symbol();
809
810 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
811 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
812 methodHandle m;
813 // Only do exact lookup if receiver klass has been linked. Otherwise,
814 // the vtable has not been setup, and the LinkResolver will fail.
815 if (recv->is_array_klass()
816 ||
817 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
818 if (holder()->is_interface()) {
819 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
820 } else {
821 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
822 }
823 }
824
825 if (m.is_null()) {
826 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
827 return NULL;
828 }
829
830 ciMethod* result = this;
831 if (m() != get_Method()) {
832 result = CURRENT_THREAD_ENV->get_method(m());
833 }
834
835 // Don't return abstract methods because they aren't
836 // optimizable or interesting.
837 if (result->is_abstract()) {
838 return NULL;
839 } else {
840 return result;
841 }
842 }
843
844 // ------------------------------------------------------------------
845 // ciMethod::resolve_vtable_index
846 //
847 // Given a known receiver klass, find the vtable index for the call.
848 // Return Method::invalid_vtable_index if the vtable_index is unknown.
849 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
850 check_is_loaded();
851
852 int vtable_index = Method::invalid_vtable_index;
853 // Only do lookup if receiver klass has been linked. Otherwise,
854 // the vtable has not been setup, and the LinkResolver will fail.
855 if (!receiver->is_interface()
856 && (!receiver->is_instance_klass() ||
857 receiver->as_instance_klass()->is_linked())) {
858 VM_ENTRY_MARK;
859
860 Klass* caller_klass = caller->get_Klass();
861 Klass* recv = receiver->get_Klass();
862 Symbol* h_name = name()->get_symbol();
863 Symbol* h_signature = signature()->get_symbol();
864
865 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
866 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
867 if (vtable_index == Method::nonvirtual_vtable_index) {
868 // A statically bound method. Return "no such index".
869 vtable_index = Method::invalid_vtable_index;
870 }
871 }
872
873 return vtable_index;
874 }
875
876 // ------------------------------------------------------------------
877 // ciMethod::interpreter_call_site_count
878 int ciMethod::interpreter_call_site_count(int bci) {
879 if (method_data() != NULL) {
880 ResourceMark rm;
881 ciProfileData* data = method_data()->bci_to_data(bci);
882 if (data != NULL && data->is_CounterData()) {
883 return scale_count(data->as_CounterData()->count());
884 }
885 }
886 return -1; // unknown
887 }
888
889 // ------------------------------------------------------------------
890 // ciMethod::get_field_at_bci
891 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
892 ciBytecodeStream iter(this);
893 iter.reset_to_bci(bci);
894 iter.next();
895 return iter.get_field(will_link);
896 }
897
898 // ------------------------------------------------------------------
899 // ciMethod::get_method_at_bci
900 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
901 ciBytecodeStream iter(this);
902 iter.reset_to_bci(bci);
903 iter.next();
904 return iter.get_method(will_link, declared_signature);
905 }
906
907 // ------------------------------------------------------------------
908 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
909 ciBytecodeStream iter(this);
910 iter.reset_to_bci(bci);
911 iter.next();
912 return iter.get_declared_method_holder();
913 }
914
915 // ------------------------------------------------------------------
916 // Adjust a CounterData count to be commensurate with
917 // interpreter_invocation_count. If the MDO exists for
918 // only 25% of the time the method exists, then the
919 // counts in the MDO should be scaled by 4X, so that
920 // they can be usefully and stably compared against the
921 // invocation counts in methods.
922 int ciMethod::scale_count(int count, float prof_factor) {
923 if (count > 0 && method_data() != NULL) {
924 int counter_life;
925 int method_life = interpreter_invocation_count();
926 if (TieredCompilation) {
927 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
928 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
929 } else {
930 int current_mileage = method_data()->current_mileage();
931 int creation_mileage = method_data()->creation_mileage();
932 counter_life = current_mileage - creation_mileage;
933 }
934
935 // counter_life due to backedge_counter could be > method_life
936 if (counter_life > method_life)
937 counter_life = method_life;
938 if (0 < counter_life && counter_life <= method_life) {
939 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
940 count = (count > 0) ? count : 1;
941 }
942 }
943 return count;
944 }
945
946
947 // ------------------------------------------------------------------
948 // ciMethod::is_special_get_caller_class_method
949 //
950 bool ciMethod::is_ignored_by_security_stack_walk() const {
951 check_is_loaded();
952 VM_ENTRY_MARK;
953 return get_Method()->is_ignored_by_security_stack_walk();
954 }
955
956 // ------------------------------------------------------------------
957 // ciMethod::needs_clinit_barrier
958 //
959 bool ciMethod::needs_clinit_barrier() const {
960 check_is_loaded();
961 return is_static() && !holder()->is_initialized();
962 }
963
964 // ------------------------------------------------------------------
965 // invokedynamic support
966
967 // ------------------------------------------------------------------
968 // ciMethod::is_method_handle_intrinsic
969 //
970 // Return true if the method is an instance of the JVM-generated
971 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
972 bool ciMethod::is_method_handle_intrinsic() const {
973 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
974 return (MethodHandles::is_signature_polymorphic(iid) &&
975 MethodHandles::is_signature_polymorphic_intrinsic(iid));
976 }
977
978 // ------------------------------------------------------------------
979 // ciMethod::is_compiled_lambda_form
980 //
981 // Return true if the method is a generated MethodHandle adapter.
982 // These are built by Java code.
983 bool ciMethod::is_compiled_lambda_form() const {
984 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
985 return iid == vmIntrinsics::_compiledLambdaForm;
986 }
987
988 // ------------------------------------------------------------------
989 // ciMethod::is_object_initializer
990 //
991 bool ciMethod::is_object_initializer() const {
992 return name() == ciSymbol::object_initializer_name();
993 }
994
995 // ------------------------------------------------------------------
996 // ciMethod::has_member_arg
997 //
998 // Return true if the method is a linker intrinsic like _linkToVirtual.
999 // These are built by the JVM.
1000 bool ciMethod::has_member_arg() const {
1001 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1002 return (MethodHandles::is_signature_polymorphic(iid) &&
1003 MethodHandles::has_member_arg(iid));
1004 }
1005
1006 // ------------------------------------------------------------------
1007 // ciMethod::ensure_method_data
1008 //
1009 // Generate new MethodData* objects at compile time.
1010 // Return true if allocation was successful or no MDO is required.
1011 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1012 EXCEPTION_CONTEXT;
1013 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1014 return true;
1015 }
1016 if (h_m()->method_data() == NULL) {
1017 Method::build_interpreter_method_data(h_m, THREAD);
1018 if (HAS_PENDING_EXCEPTION) {
1019 CLEAR_PENDING_EXCEPTION;
1020 }
1021 }
1022 if (h_m()->method_data() != NULL) {
1023 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1024 _method_data->load_data();
1025 return true;
1026 } else {
1027 _method_data = CURRENT_ENV->get_empty_methodData();
1028 return false;
1029 }
1030 }
1031
1032 // public, retroactive version
1033 bool ciMethod::ensure_method_data() {
1034 bool result = true;
1035 if (_method_data == NULL || _method_data->is_empty()) {
1036 GUARDED_VM_ENTRY({
1037 result = ensure_method_data(get_Method());
1038 });
1039 }
1040 return result;
1041 }
1042
1043
1044 // ------------------------------------------------------------------
1045 // ciMethod::method_data
1046 //
1047 ciMethodData* ciMethod::method_data() {
1048 if (_method_data != NULL) {
1049 return _method_data;
1050 }
1051 VM_ENTRY_MARK;
1052 ciEnv* env = CURRENT_ENV;
1053 Thread* my_thread = JavaThread::current();
1054 methodHandle h_m(my_thread, get_Method());
1055
1056 if (h_m()->method_data() != NULL) {
1057 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1058 _method_data->load_data();
1059 } else {
1060 _method_data = CURRENT_ENV->get_empty_methodData();
1061 }
1062 return _method_data;
1063
1064 }
1065
1066 // ------------------------------------------------------------------
1067 // ciMethod::method_data_or_null
1068 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1069 // NULL otherwise.
1070 ciMethodData* ciMethod::method_data_or_null() {
1071 ciMethodData *md = method_data();
1072 if (md->is_empty()) {
1073 return NULL;
1074 }
1075 return md;
1076 }
1077
1078 // ------------------------------------------------------------------
1079 // ciMethod::ensure_method_counters
1080 //
1081 MethodCounters* ciMethod::ensure_method_counters() {
1082 check_is_loaded();
1083 VM_ENTRY_MARK;
1084 methodHandle mh(THREAD, get_Method());
1085 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1086 return method_counters;
1087 }
1088
1089 // ------------------------------------------------------------------
1090 // ciMethod::has_option
1091 //
1092 bool ciMethod::has_option(const char* option) {
1093 check_is_loaded();
1094 VM_ENTRY_MARK;
1095 methodHandle mh(THREAD, get_Method());
1096 return CompilerOracle::has_option_string(mh, option);
1097 }
1098
1099 // ------------------------------------------------------------------
1100 // ciMethod::has_option_value
1101 //
1102 bool ciMethod::has_option_value(const char* option, double& value) {
1103 check_is_loaded();
1104 VM_ENTRY_MARK;
1105 methodHandle mh(THREAD, get_Method());
1106 return CompilerOracle::has_option_value(mh, option, value);
1107 }
1108 // ------------------------------------------------------------------
1109 // ciMethod::can_be_compiled
1110 //
1111 // Have previous compilations of this method succeeded?
1112 bool ciMethod::can_be_compiled() {
1113 check_is_loaded();
1114 ciEnv* env = CURRENT_ENV;
1115 if (is_c1_compile(env->comp_level())) {
1116 return _is_c1_compilable;
1117 }
1118 return _is_c2_compilable;
1119 }
1120
1121 // ------------------------------------------------------------------
1122 // ciMethod::set_not_compilable
1123 //
1124 // Tell the VM that this method cannot be compiled at all.
1125 void ciMethod::set_not_compilable(const char* reason) {
1126 check_is_loaded();
1127 VM_ENTRY_MARK;
1128 ciEnv* env = CURRENT_ENV;
1129 if (is_c1_compile(env->comp_level())) {
1130 _is_c1_compilable = false;
1131 } else {
1132 _is_c2_compilable = false;
1133 }
1134 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1135 }
1136
1137 // ------------------------------------------------------------------
1138 // ciMethod::can_be_osr_compiled
1139 //
1140 // Have previous compilations of this method succeeded?
1141 //
1142 // Implementation note: the VM does not currently keep track
1143 // of failed OSR compilations per bci. The entry_bci parameter
1144 // is currently unused.
1145 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1146 check_is_loaded();
1147 VM_ENTRY_MARK;
1148 ciEnv* env = CURRENT_ENV;
1149 return !get_Method()->is_not_osr_compilable(env->comp_level());
1150 }
1151
1152 // ------------------------------------------------------------------
1153 // ciMethod::has_compiled_code
1154 bool ciMethod::has_compiled_code() {
1155 return instructions_size() > 0;
1156 }
1157
1158 int ciMethod::comp_level() {
1159 check_is_loaded();
1160 VM_ENTRY_MARK;
1161 CompiledMethod* nm = get_Method()->code();
1162 if (nm != NULL) return nm->comp_level();
1163 return 0;
1164 }
1165
1166 int ciMethod::highest_osr_comp_level() {
1167 check_is_loaded();
1168 VM_ENTRY_MARK;
1169 return get_Method()->highest_osr_comp_level();
1170 }
1171
1172 // ------------------------------------------------------------------
1173 // ciMethod::code_size_for_inlining
1174 //
1175 // Code size for inlining decisions. This method returns a code
1176 // size of 1 for methods which has the ForceInline annotation.
1177 int ciMethod::code_size_for_inlining() {
1178 check_is_loaded();
1179 if (get_Method()->force_inline()) {
1180 return 1;
1181 }
1182 return code_size();
1183 }
1184
1185 // ------------------------------------------------------------------
1186 // ciMethod::instructions_size
1187 //
1188 // This is a rough metric for "fat" methods, compared before inlining
1189 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1190 // junk like exception handler, stubs, and constant table, which are
1191 // not highly relevant to an inlined method. So we use the more
1192 // specific accessor nmethod::insts_size.
1193 int ciMethod::instructions_size() {
1194 if (_instructions_size == -1) {
1195 GUARDED_VM_ENTRY(
1196 CompiledMethod* code = get_Method()->code();
1197 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1198 _instructions_size = code->insts_end() - code->verified_entry_point();
1199 } else {
1200 _instructions_size = 0;
1201 }
1202 );
1203 }
1204 return _instructions_size;
1205 }
1206
1207 // ------------------------------------------------------------------
1208 // ciMethod::log_nmethod_identity
1209 void ciMethod::log_nmethod_identity(xmlStream* log) {
1210 GUARDED_VM_ENTRY(
1211 CompiledMethod* code = get_Method()->code();
1212 if (code != NULL) {
1213 code->log_identity(log);
1214 }
1215 )
1216 }
1217
1218 // ------------------------------------------------------------------
1219 // ciMethod::is_not_reached
1220 bool ciMethod::is_not_reached(int bci) {
1221 check_is_loaded();
1222 VM_ENTRY_MARK;
1223 return Interpreter::is_not_reached(
1224 methodHandle(THREAD, get_Method()), bci);
1225 }
1226
1227 // ------------------------------------------------------------------
1228 // ciMethod::was_never_executed
1229 bool ciMethod::was_executed_more_than(int times) {
1230 VM_ENTRY_MARK;
1231 return get_Method()->was_executed_more_than(times);
1232 }
1233
1234 // ------------------------------------------------------------------
1235 // ciMethod::has_unloaded_classes_in_signature
1236 bool ciMethod::has_unloaded_classes_in_signature() {
1237 VM_ENTRY_MARK;
1238 {
1239 EXCEPTION_MARK;
1240 methodHandle m(THREAD, get_Method());
1241 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1242 if( HAS_PENDING_EXCEPTION ) {
1243 CLEAR_PENDING_EXCEPTION;
1244 return true; // Declare that we may have unloaded classes
1245 }
1246 return has_unloaded;
1247 }
1248 }
1249
1250 // ------------------------------------------------------------------
1251 // ciMethod::is_klass_loaded
1252 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1253 VM_ENTRY_MARK;
1254 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1255 }
1256
1257 // ------------------------------------------------------------------
1258 // ciMethod::check_call
1259 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1260 // This method is used only in C2 from InlineTree::ok_to_inline,
1261 // and is only used under -Xcomp.
1262 // It appears to fail when applied to an invokeinterface call site.
1263 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1264 VM_ENTRY_MARK;
1265 {
1266 EXCEPTION_MARK;
1267 HandleMark hm(THREAD);
1268 constantPoolHandle pool (THREAD, get_Method()->constants());
1269 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1270 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1271 if (HAS_PENDING_EXCEPTION) {
1272 CLEAR_PENDING_EXCEPTION;
1273 return false;
1274 } else {
1275 return (spec_method->is_static() == is_static);
1276 }
1277 }
1278 return false;
1279 }
1280
1281 // ------------------------------------------------------------------
1282 // ciMethod::profile_aging
1283 //
1284 // Should the method be compiled with an age counter?
1285 bool ciMethod::profile_aging() const {
1286 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1287 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1288 }
1289 // ------------------------------------------------------------------
1290 // ciMethod::print_codes
1291 //
1292 // Print the bytecodes for this method.
1293 void ciMethod::print_codes_on(outputStream* st) {
1294 check_is_loaded();
1295 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1296 }
1297
1298
1299 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1300 check_is_loaded(); \
1301 VM_ENTRY_MARK; \
1302 return get_Method()->flag_accessor(); \
1303 }
1304
1305 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1306 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1307 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1308 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1309 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1310 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1311 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1312 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1313
1314 bool ciMethod::is_boxing_method() const {
1315 if (holder()->is_box_klass()) {
1316 switch (intrinsic_id()) {
1317 case vmIntrinsics::_Boolean_valueOf:
1318 case vmIntrinsics::_Byte_valueOf:
1319 case vmIntrinsics::_Character_valueOf:
1320 case vmIntrinsics::_Short_valueOf:
1321 case vmIntrinsics::_Integer_valueOf:
1322 case vmIntrinsics::_Long_valueOf:
1323 case vmIntrinsics::_Float_valueOf:
1324 case vmIntrinsics::_Double_valueOf:
1325 return true;
1326 default:
1327 return false;
1328 }
1329 }
1330 return false;
1331 }
1332
1333 bool ciMethod::is_unboxing_method() const {
1334 if (holder()->is_box_klass()) {
1335 switch (intrinsic_id()) {
1336 case vmIntrinsics::_booleanValue:
1337 case vmIntrinsics::_byteValue:
1338 case vmIntrinsics::_charValue:
1339 case vmIntrinsics::_shortValue:
1340 case vmIntrinsics::_intValue:
1341 case vmIntrinsics::_longValue:
1342 case vmIntrinsics::_floatValue:
1343 case vmIntrinsics::_doubleValue:
1344 return true;
1345 default:
1346 return false;
1347 }
1348 }
1349 return false;
1350 }
1351
1352 BCEscapeAnalyzer *ciMethod::get_bcea() {
1353 #ifdef COMPILER2
1354 if (_bcea == NULL) {
1355 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1356 }
1357 return _bcea;
1358 #else // COMPILER2
1359 ShouldNotReachHere();
1360 return NULL;
1361 #endif // COMPILER2
1362 }
1363
1364 ciMethodBlocks *ciMethod::get_method_blocks() {
1365 Arena *arena = CURRENT_ENV->arena();
1366 if (_method_blocks == NULL) {
1367 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1368 }
1369 return _method_blocks;
1370 }
1371
1372 #undef FETCH_FLAG_FROM_VM
1373
1374 void ciMethod::dump_name_as_ascii(outputStream* st) {
1375 Method* method = get_Method();
1376 st->print("%s %s %s",
1377 method->klass_name()->as_quoted_ascii(),
1378 method->name()->as_quoted_ascii(),
1379 method->signature()->as_quoted_ascii());
1380 }
1381
1382 void ciMethod::dump_replay_data(outputStream* st) {
1383 ResourceMark rm;
1384 Method* method = get_Method();
1385 MethodCounters* mcs = method->method_counters();
1386 st->print("ciMethod ");
1387 dump_name_as_ascii(st);
1388 st->print_cr(" %d %d %d %d %d",
1389 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1390 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1391 interpreter_invocation_count(),
1392 interpreter_throwout_count(),
1393 _instructions_size);
1394 }
1395
1396 // ------------------------------------------------------------------
1397 // ciMethod::print_codes
1398 //
1399 // Print a range of the bytecodes for this method.
1400 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1401 check_is_loaded();
1402 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1403 }
1404
1405 // ------------------------------------------------------------------
1406 // ciMethod::print_name
1407 //
1408 // Print the name of this method, including signature and some flags.
1409 void ciMethod::print_name(outputStream* st) {
1410 check_is_loaded();
1411 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1412 }
1413
1414 // ------------------------------------------------------------------
1415 // ciMethod::print_short_name
1416 //
1417 // Print the name of this method, without signature.
1418 void ciMethod::print_short_name(outputStream* st) {
1419 if (is_loaded()) {
1420 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1421 } else {
1422 // Fall back if method is not loaded.
1423 holder()->print_name_on(st);
1424 st->print("::");
1425 name()->print_symbol_on(st);
1426 if (WizardMode)
1427 signature()->as_symbol()->print_symbol_on(st);
1428 }
1429 }
1430
1431 // ------------------------------------------------------------------
1432 // ciMethod::print_impl
1433 //
1434 // Implementation of the print method.
1435 void ciMethod::print_impl(outputStream* st) {
1436 ciMetadata::print_impl(st);
1437 st->print(" name=");
1438 name()->print_symbol_on(st);
1439 st->print(" holder=");
1440 holder()->print_name_on(st);
1441 st->print(" signature=");
1442 signature()->as_symbol()->print_symbol_on(st);
1443 if (is_loaded()) {
1444 st->print(" loaded=true");
1445 st->print(" arg_size=%d", arg_size());
1446 st->print(" flags=");
1447 flags().print_member_flags(st);
1448 } else {
1449 st->print(" loaded=false");
1450 }
1451 }
1452
1453 // ------------------------------------------------------------------
1454
1455 static BasicType erase_to_word_type(BasicType bt) {
1456 if (is_subword_type(bt)) return T_INT;
1457 if (bt == T_ARRAY) return T_OBJECT;
1458 return bt;
1459 }
1460
1461 static bool basic_types_match(ciType* t1, ciType* t2) {
1462 if (t1 == t2) return true;
1463 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1464 }
1465
1466 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1467 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1468 !resolved_method->is_method_handle_intrinsic();
1469
1470 if (!invoke_through_mh_intrinsic) {
1471 // Method name & descriptor should stay the same.
1472 // Signatures may reference unloaded types and thus they may be not strictly equal.
1473 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1474 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1475
1476 return (declared_method->name()->equals(resolved_method->name())) &&
1477 (declared_signature->equals(resolved_signature));
1478 }
1479
1480 ciMethod* linker = declared_method;
1481 ciMethod* target = resolved_method;
1482 // Linkers have appendix argument which is not passed to callee.
1483 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1484 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1485 return false; // argument slot count mismatch
1486 }
1487
1488 ciSignature* linker_sig = linker->signature();
1489 ciSignature* target_sig = target->signature();
1490
1491 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1492 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1493 return false; // argument count mismatch
1494 }
1495
1496 int sbase = 0, rbase = 0;
1497 switch (linker->intrinsic_id()) {
1498 case vmIntrinsics::_linkToVirtual:
1499 case vmIntrinsics::_linkToInterface:
1500 case vmIntrinsics::_linkToSpecial: {
1501 if (target->is_static()) {
1502 return false;
1503 }
1504 if (linker_sig->type_at(0)->is_primitive_type()) {
1505 return false; // receiver should be an oop
1506 }
1507 sbase = 1; // skip receiver
1508 break;
1509 }
1510 case vmIntrinsics::_linkToStatic: {
1511 if (!target->is_static()) {
1512 return false;
1513 }
1514 break;
1515 }
1516 case vmIntrinsics::_invokeBasic: {
1517 if (target->is_static()) {
1518 if (target_sig->type_at(0)->is_primitive_type()) {
1519 return false; // receiver should be an oop
1520 }
1521 rbase = 1; // skip receiver
1522 }
1523 break;
1524 }
1525 default:
1526 break;
1527 }
1528 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1529 int arg_count = target_sig->count() - rbase;
1530 for (int i = 0; i < arg_count; i++) {
1531 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1532 return false;
1533 }
1534 }
1535 // Only check the return type if the symbolic info has non-void return type.
1536 // I.e. the return value of the resolved method can be dropped.
1537 if (!linker->return_type()->is_void() &&
1538 !basic_types_match(linker->return_type(), target->return_type())) {
1539 return false;
1540 }
1541 return true; // no mismatch found
1542 }
1543
1544 // ------------------------------------------------------------------