1 /*
2 * Copyright (c) 1999, 2020, 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 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
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(Thread::current(), 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(methodHandle(THREAD, 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::check_overflow
466 //
467 // Check whether the profile counter is overflowed and adjust if true.
468 // For invoke* it will turn negative values into max_jint,
469 // and for checkcast/aastore/instanceof turn positive values into min_jint.
470 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
471 switch (code) {
472 case Bytecodes::_aastore: // fall-through
473 case Bytecodes::_checkcast: // fall-through
474 case Bytecodes::_instanceof: {
475 return (c > 0 ? min_jint : c); // always non-positive
476 }
477 default: {
478 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
479 return (c < 0 ? max_jint : c); // always non-negative
480 }
481 }
482 }
483
484
485 // ------------------------------------------------------------------
486 // ciMethod::call_profile_at_bci
487 //
488 // Get the ciCallProfile for the invocation of this method.
489 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
490 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
491 ResourceMark rm;
492 ciCallProfile result;
493 if (method_data() != NULL && method_data()->is_mature()) {
494 ciProfileData* data = method_data()->bci_to_data(bci);
495 if (data != NULL && data->is_CounterData()) {
496 // Every profiled call site has a counter.
497 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
498
499 if (!data->is_ReceiverTypeData()) {
500 result._receiver_count[0] = 0; // that's a definite zero
501 } else { // ReceiverTypeData is a subclass of CounterData
502 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
503 // In addition, virtual call sites have receiver type information
504 int receivers_count_total = 0;
505 int morphism = 0;
506 // Precompute morphism for the possible fixup
507 for (uint i = 0; i < call->row_limit(); i++) {
508 ciKlass* receiver = call->receiver(i);
509 if (receiver == NULL) continue;
510 morphism++;
511 }
512 int epsilon = 0;
513 if (TieredCompilation) {
514 // For a call, it is assumed that either the type of the receiver(s)
515 // is recorded or an associated counter is incremented, but not both. With
516 // tiered compilation, however, both can happen due to the interpreter and
517 // C1 profiling invocations differently. Address that inconsistency here.
518 if (morphism == 1 && count > 0) {
519 epsilon = count;
520 count = 0;
521 }
522 }
523 for (uint i = 0; i < call->row_limit(); i++) {
524 ciKlass* receiver = call->receiver(i);
525 if (receiver == NULL) continue;
526 int rcount = saturated_add(call->receiver_count(i), epsilon);
527 if (rcount == 0) rcount = 1; // Should be valid value
528 receivers_count_total = saturated_add(receivers_count_total, rcount);
529 // Add the receiver to result data.
530 result.add_receiver(receiver, rcount);
531 // If we extend profiling to record methods,
532 // we will set result._method also.
533 }
534 // Determine call site's morphism.
535 // The call site count is 0 with known morphism (only 1 or 2 receivers)
536 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
537 // The call site count is > 0 in the case of a polymorphic virtual call.
538 if (morphism > 0 && morphism == result._limit) {
539 // The morphism <= MorphismLimit.
540 if ((morphism < ciCallProfile::MorphismLimit) ||
541 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
542 #ifdef ASSERT
543 if (count > 0) {
544 this->print_short_name(tty);
545 tty->print_cr(" @ bci:%d", bci);
546 this->print_codes();
547 assert(false, "this call site should not be polymorphic");
548 }
549 #endif
550 result._morphism = morphism;
551 }
552 }
553 // Make the count consistent if this is a call profile. If count is
554 // zero or less, presume that this is a typecheck profile and
555 // do nothing. Otherwise, increase count to be the sum of all
556 // receiver's counts.
557 if (count >= 0) {
558 count = saturated_add(count, receivers_count_total);
559 }
560 }
561 result._count = count;
562 }
563 }
564 return result;
565 }
566
567 // ------------------------------------------------------------------
568 // Add new receiver and sort data by receiver's profile count.
569 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
570 // Add new receiver and sort data by receiver's counts when we have space
571 // for it otherwise replace the less called receiver (less called receiver
572 // is placed to the last array element which is not used).
573 // First array's element contains most called receiver.
574 int i = _limit;
575 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
576 _receiver[i] = _receiver[i-1];
577 _receiver_count[i] = _receiver_count[i-1];
578 }
579 _receiver[i] = receiver;
580 _receiver_count[i] = receiver_count;
581 if (_limit < MorphismLimit) _limit++;
582 }
583
584
585 void ciMethod::assert_virtual_call_type_ok(int bci) {
586 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
587 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
588 }
589
590 void ciMethod::assert_call_type_ok(int bci) {
591 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
592 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
593 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
594 }
595
596 /**
597 * Check whether profiling provides a type for the argument i to the
598 * call at bci bci
599 *
600 * @param [in]bci bci of the call
601 * @param [in]i argument number
602 * @param [out]type profiled type of argument, NULL if none
603 * @param [out]ptr_kind whether always null, never null or maybe null
604 * @return true if profiling exists
605 *
606 */
607 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
608 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
609 ciProfileData* data = method_data()->bci_to_data(bci);
610 if (data != NULL) {
611 if (data->is_VirtualCallTypeData()) {
612 assert_virtual_call_type_ok(bci);
613 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
614 if (i >= call->number_of_arguments()) {
615 return false;
616 }
617 type = call->valid_argument_type(i);
618 ptr_kind = call->argument_ptr_kind(i);
619 return true;
620 } else if (data->is_CallTypeData()) {
621 assert_call_type_ok(bci);
622 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
623 if (i >= call->number_of_arguments()) {
624 return false;
625 }
626 type = call->valid_argument_type(i);
627 ptr_kind = call->argument_ptr_kind(i);
628 return true;
629 }
630 }
631 }
632 return false;
633 }
634
635 /**
636 * Check whether profiling provides a type for the return value from
637 * the call at bci bci
638 *
639 * @param [in]bci bci of the call
640 * @param [out]type profiled type of argument, NULL if none
641 * @param [out]ptr_kind whether always null, never null or maybe null
642 * @return true if profiling exists
643 *
644 */
645 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
646 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
647 ciProfileData* data = method_data()->bci_to_data(bci);
648 if (data != NULL) {
649 if (data->is_VirtualCallTypeData()) {
650 assert_virtual_call_type_ok(bci);
651 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
652 if (call->has_return()) {
653 type = call->valid_return_type();
654 ptr_kind = call->return_ptr_kind();
655 return true;
656 }
657 } else if (data->is_CallTypeData()) {
658 assert_call_type_ok(bci);
659 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
660 if (call->has_return()) {
661 type = call->valid_return_type();
662 ptr_kind = call->return_ptr_kind();
663 }
664 return true;
665 }
666 }
667 }
668 return false;
669 }
670
671 /**
672 * Check whether profiling provides a type for the parameter i
673 *
674 * @param [in]i parameter number
675 * @param [out]type profiled type of parameter, NULL if none
676 * @param [out]ptr_kind whether always null, never null or maybe null
677 * @return true if profiling exists
678 *
679 */
680 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
681 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
682 ciParametersTypeData* parameters = method_data()->parameters_type_data();
683 if (parameters != NULL && i < parameters->number_of_parameters()) {
684 type = parameters->valid_parameter_type(i);
685 ptr_kind = parameters->parameter_ptr_kind(i);
686 return true;
687 }
688 }
689 return false;
690 }
691
692
693 // ------------------------------------------------------------------
694 // ciMethod::find_monomorphic_target
695 //
696 // Given a certain calling environment, find the monomorphic target
697 // for the call. Return NULL if the call is not monomorphic in
698 // its calling environment, or if there are only abstract methods.
699 // The returned method is never abstract.
700 // Note: If caller uses a non-null result, it must inform dependencies
701 // via assert_unique_concrete_method or assert_leaf_type.
702 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
703 ciInstanceKlass* callee_holder,
704 ciInstanceKlass* actual_recv,
705 bool check_access) {
706 check_is_loaded();
707
708 if (actual_recv->is_interface()) {
709 // %%% We cannot trust interface types, yet. See bug 6312651.
710 return NULL;
711 }
712
713 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
714 if (root_m == NULL) {
715 // Something went wrong looking up the actual receiver method.
716 return NULL;
717 }
718 assert(!root_m->is_abstract(), "resolve_invoke promise");
719
720 // Make certain quick checks even if UseCHA is false.
721
722 // Is it private or final?
723 if (root_m->can_be_statically_bound()) {
724 return root_m;
725 }
726
727 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
728 // Easy case. There is no other place to put a method, so don't bother
729 // to go through the VM_ENTRY_MARK and all the rest.
730 return root_m;
731 }
732
733 // Array methods (clone, hashCode, etc.) are always statically bound.
734 // If we were to see an array type here, we'd return root_m.
735 // However, this method processes only ciInstanceKlasses. (See 4962591.)
736 // The inline_native_clone intrinsic narrows Object to T[] properly,
737 // so there is no need to do the same job here.
738
739 if (!UseCHA) return NULL;
740
741 VM_ENTRY_MARK;
742
743 // Disable CHA for default methods for now
744 if (root_m->is_default_method()) {
745 return NULL;
746 }
747
748 methodHandle target;
749 {
750 MutexLocker locker(Compile_lock);
751 Klass* context = actual_recv->get_Klass();
752 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
753 root_m->get_Method()));
754 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
755 }
756
757 #ifndef PRODUCT
758 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
759 tty->print("found a non-root unique target method");
760 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
761 tty->print(" method = ");
762 target->print_short_name(tty);
763 tty->cr();
764 }
765 #endif //PRODUCT
766
767 if (target() == NULL) {
768 return NULL;
769 }
770 if (target() == root_m->get_Method()) {
771 return root_m;
772 }
773 if (!root_m->is_public() &&
774 !root_m->is_protected()) {
775 // If we are going to reason about inheritance, it's easiest
776 // if the method in question is public, protected, or private.
777 // If the answer is not root_m, it is conservatively correct
778 // to return NULL, even if the CHA encountered irrelevant
779 // methods in other packages.
780 // %%% TO DO: Work out logic for package-private methods
781 // with the same name but different vtable indexes.
782 return NULL;
783 }
784 assert(!target()->is_abstract(), "not allowed");
785 return CURRENT_THREAD_ENV->get_method(target());
786 }
787
788 // ------------------------------------------------------------------
789 // ciMethod::can_be_statically_bound
790 //
791 // Tries to determine whether a method can be statically bound in some context.
792 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
793 return (holder() == context) && can_be_statically_bound();
794 }
795
796 // ------------------------------------------------------------------
797 // ciMethod::resolve_invoke
798 //
799 // Given a known receiver klass, find the target for the call.
800 // Return NULL if the call has no target or the target is abstract.
801 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
802 check_is_loaded();
803 VM_ENTRY_MARK;
804
805 Klass* caller_klass = caller->get_Klass();
806 Klass* recv = exact_receiver->get_Klass();
807 Klass* resolved = holder()->get_Klass();
808 Symbol* h_name = name()->get_symbol();
809 Symbol* h_signature = signature()->get_symbol();
810
811 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
812 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip);
813 Method* m = NULL;
814 // Only do exact lookup if receiver klass has been linked. Otherwise,
815 // the vtable has not been setup, and the LinkResolver will fail.
816 if (recv->is_array_klass()
817 ||
818 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
819 if (holder()->is_interface()) {
820 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
821 } else {
822 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
823 }
824 }
825
826 if (m == NULL) {
827 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
828 return NULL;
829 }
830
831 ciMethod* result = this;
832 if (m != get_Method()) {
833 result = CURRENT_THREAD_ENV->get_method(m);
834 }
835
836 // Don't return abstract methods because they aren't
837 // optimizable or interesting.
838 if (result->is_abstract()) {
839 return NULL;
840 } else {
841 return result;
842 }
843 }
844
845 // ------------------------------------------------------------------
846 // ciMethod::resolve_vtable_index
847 //
848 // Given a known receiver klass, find the vtable index for the call.
849 // Return Method::invalid_vtable_index if the vtable_index is unknown.
850 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
851 check_is_loaded();
852
853 int vtable_index = Method::invalid_vtable_index;
854 // Only do lookup if receiver klass has been linked. Otherwise,
855 // the vtable has not been setup, and the LinkResolver will fail.
856 if (!receiver->is_interface()
857 && (!receiver->is_instance_klass() ||
858 receiver->as_instance_klass()->is_linked())) {
859 VM_ENTRY_MARK;
860
861 Klass* caller_klass = caller->get_Klass();
862 Klass* recv = receiver->get_Klass();
863 Symbol* h_name = name()->get_symbol();
864 Symbol* h_signature = signature()->get_symbol();
865
866 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
867 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
868 if (vtable_index == Method::nonvirtual_vtable_index) {
869 // A statically bound method. Return "no such index".
870 vtable_index = Method::invalid_vtable_index;
871 }
872 }
873
874 return vtable_index;
875 }
876
877 // ------------------------------------------------------------------
878 // ciMethod::interpreter_call_site_count
879 int ciMethod::interpreter_call_site_count(int bci) {
880 if (method_data() != NULL) {
881 ResourceMark rm;
882 ciProfileData* data = method_data()->bci_to_data(bci);
883 if (data != NULL && data->is_CounterData()) {
884 return scale_count(data->as_CounterData()->count());
885 }
886 }
887 return -1; // unknown
888 }
889
890 // ------------------------------------------------------------------
891 // ciMethod::get_field_at_bci
892 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
893 ciBytecodeStream iter(this);
894 iter.reset_to_bci(bci);
895 iter.next();
896 return iter.get_field(will_link);
897 }
898
899 // ------------------------------------------------------------------
900 // ciMethod::get_method_at_bci
901 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
902 ciBytecodeStream iter(this);
903 iter.reset_to_bci(bci);
904 iter.next();
905 return iter.get_method(will_link, declared_signature);
906 }
907
908 // ------------------------------------------------------------------
909 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
910 ciBytecodeStream iter(this);
911 iter.reset_to_bci(bci);
912 iter.next();
913 return iter.get_declared_method_holder();
914 }
915
916 // ------------------------------------------------------------------
917 // Adjust a CounterData count to be commensurate with
918 // interpreter_invocation_count. If the MDO exists for
919 // only 25% of the time the method exists, then the
920 // counts in the MDO should be scaled by 4X, so that
921 // they can be usefully and stably compared against the
922 // invocation counts in methods.
923 int ciMethod::scale_count(int count, float prof_factor) {
924 if (count > 0 && method_data() != NULL) {
925 int counter_life;
926 int method_life = interpreter_invocation_count();
927 if (TieredCompilation) {
928 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
929 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
930 } else {
931 int current_mileage = method_data()->current_mileage();
932 int creation_mileage = method_data()->creation_mileage();
933 counter_life = current_mileage - creation_mileage;
934 }
935
936 // counter_life due to backedge_counter could be > method_life
937 if (counter_life > method_life)
938 counter_life = method_life;
939 if (0 < counter_life && counter_life <= method_life) {
940 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
941 count = (count > 0) ? count : 1;
942 }
943 }
944 return count;
945 }
946
947
948 // ------------------------------------------------------------------
949 // ciMethod::is_special_get_caller_class_method
950 //
951 bool ciMethod::is_ignored_by_security_stack_walk() const {
952 check_is_loaded();
953 VM_ENTRY_MARK;
954 return get_Method()->is_ignored_by_security_stack_walk();
955 }
956
957 // ------------------------------------------------------------------
958 // ciMethod::needs_clinit_barrier
959 //
960 bool ciMethod::needs_clinit_barrier() const {
961 check_is_loaded();
962 return is_static() && !holder()->is_initialized();
963 }
964
965 // ------------------------------------------------------------------
966 // invokedynamic support
967
968 // ------------------------------------------------------------------
969 // ciMethod::is_method_handle_intrinsic
970 //
971 // Return true if the method is an instance of the JVM-generated
972 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
973 bool ciMethod::is_method_handle_intrinsic() const {
974 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
975 return (MethodHandles::is_signature_polymorphic(iid) &&
976 MethodHandles::is_signature_polymorphic_intrinsic(iid));
977 }
978
979 // ------------------------------------------------------------------
980 // ciMethod::is_compiled_lambda_form
981 //
982 // Return true if the method is a generated MethodHandle adapter.
983 // These are built by Java code.
984 bool ciMethod::is_compiled_lambda_form() const {
985 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
986 return iid == vmIntrinsics::_compiledLambdaForm;
987 }
988
989 // ------------------------------------------------------------------
990 // ciMethod::is_object_initializer
991 //
992 bool ciMethod::is_object_initializer() const {
993 return name() == ciSymbol::object_initializer_name();
994 }
995
996 // ------------------------------------------------------------------
997 // ciMethod::has_member_arg
998 //
999 // Return true if the method is a linker intrinsic like _linkToVirtual.
1000 // These are built by the JVM.
1001 bool ciMethod::has_member_arg() const {
1002 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1003 return (MethodHandles::is_signature_polymorphic(iid) &&
1004 MethodHandles::has_member_arg(iid));
1005 }
1006
1007 // ------------------------------------------------------------------
1008 // ciMethod::ensure_method_data
1009 //
1010 // Generate new MethodData* objects at compile time.
1011 // Return true if allocation was successful or no MDO is required.
1012 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1013 EXCEPTION_CONTEXT;
1014 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1015 return true;
1016 }
1017 if (h_m()->method_data() == NULL) {
1018 Method::build_interpreter_method_data(h_m, THREAD);
1019 if (HAS_PENDING_EXCEPTION) {
1020 CLEAR_PENDING_EXCEPTION;
1021 }
1022 }
1023 if (h_m()->method_data() != NULL) {
1024 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1025 _method_data->load_data();
1026 return true;
1027 } else {
1028 _method_data = CURRENT_ENV->get_empty_methodData();
1029 return false;
1030 }
1031 }
1032
1033 // public, retroactive version
1034 bool ciMethod::ensure_method_data() {
1035 bool result = true;
1036 if (_method_data == NULL || _method_data->is_empty()) {
1037 GUARDED_VM_ENTRY({
1038 methodHandle mh(Thread::current(), get_Method());
1039 result = ensure_method_data(mh);
1040 });
1041 }
1042 return result;
1043 }
1044
1045
1046 // ------------------------------------------------------------------
1047 // ciMethod::method_data
1048 //
1049 ciMethodData* ciMethod::method_data() {
1050 if (_method_data != NULL) {
1051 return _method_data;
1052 }
1053 VM_ENTRY_MARK;
1054 ciEnv* env = CURRENT_ENV;
1055 Thread* my_thread = JavaThread::current();
1056 methodHandle h_m(my_thread, get_Method());
1057
1058 if (h_m()->method_data() != NULL) {
1059 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1060 _method_data->load_data();
1061 } else {
1062 _method_data = CURRENT_ENV->get_empty_methodData();
1063 }
1064 return _method_data;
1065
1066 }
1067
1068 // ------------------------------------------------------------------
1069 // ciMethod::method_data_or_null
1070 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1071 // NULL otherwise.
1072 ciMethodData* ciMethod::method_data_or_null() {
1073 ciMethodData *md = method_data();
1074 if (md->is_empty()) {
1075 return NULL;
1076 }
1077 return md;
1078 }
1079
1080 // ------------------------------------------------------------------
1081 // ciMethod::ensure_method_counters
1082 //
1083 MethodCounters* ciMethod::ensure_method_counters() {
1084 check_is_loaded();
1085 VM_ENTRY_MARK;
1086 methodHandle mh(THREAD, get_Method());
1087 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1088 return method_counters;
1089 }
1090
1091 // ------------------------------------------------------------------
1092 // ciMethod::has_option
1093 //
1094 bool ciMethod::has_option(const char* option) {
1095 check_is_loaded();
1096 VM_ENTRY_MARK;
1097 methodHandle mh(THREAD, get_Method());
1098 return CompilerOracle::has_option_string(mh, option);
1099 }
1100
1101 // ------------------------------------------------------------------
1102 // ciMethod::has_option_value
1103 //
1104 bool ciMethod::has_option_value(const char* option, double& value) {
1105 check_is_loaded();
1106 VM_ENTRY_MARK;
1107 methodHandle mh(THREAD, get_Method());
1108 return CompilerOracle::has_option_value(mh, option, value);
1109 }
1110 // ------------------------------------------------------------------
1111 // ciMethod::can_be_compiled
1112 //
1113 // Have previous compilations of this method succeeded?
1114 bool ciMethod::can_be_compiled() {
1115 check_is_loaded();
1116 ciEnv* env = CURRENT_ENV;
1117 if (is_c1_compile(env->comp_level())) {
1118 return _is_c1_compilable;
1119 }
1120 return _is_c2_compilable;
1121 }
1122
1123 // ------------------------------------------------------------------
1124 // ciMethod::set_not_compilable
1125 //
1126 // Tell the VM that this method cannot be compiled at all.
1127 void ciMethod::set_not_compilable(const char* reason) {
1128 check_is_loaded();
1129 VM_ENTRY_MARK;
1130 ciEnv* env = CURRENT_ENV;
1131 if (is_c1_compile(env->comp_level())) {
1132 _is_c1_compilable = false;
1133 } else {
1134 _is_c2_compilable = false;
1135 }
1136 get_Method()->set_not_compilable(reason, env->comp_level());
1137 }
1138
1139 // ------------------------------------------------------------------
1140 // ciMethod::can_be_osr_compiled
1141 //
1142 // Have previous compilations of this method succeeded?
1143 //
1144 // Implementation note: the VM does not currently keep track
1145 // of failed OSR compilations per bci. The entry_bci parameter
1146 // is currently unused.
1147 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1148 check_is_loaded();
1149 VM_ENTRY_MARK;
1150 ciEnv* env = CURRENT_ENV;
1151 return !get_Method()->is_not_osr_compilable(env->comp_level());
1152 }
1153
1154 // ------------------------------------------------------------------
1155 // ciMethod::has_compiled_code
1156 bool ciMethod::has_compiled_code() {
1157 return instructions_size() > 0;
1158 }
1159
1160 int ciMethod::comp_level() {
1161 check_is_loaded();
1162 VM_ENTRY_MARK;
1163 CompiledMethod* nm = get_Method()->code();
1164 if (nm != NULL) return nm->comp_level();
1165 return 0;
1166 }
1167
1168 int ciMethod::highest_osr_comp_level() {
1169 check_is_loaded();
1170 VM_ENTRY_MARK;
1171 return get_Method()->highest_osr_comp_level();
1172 }
1173
1174 // ------------------------------------------------------------------
1175 // ciMethod::code_size_for_inlining
1176 //
1177 // Code size for inlining decisions. This method returns a code
1178 // size of 1 for methods which has the ForceInline annotation.
1179 int ciMethod::code_size_for_inlining() {
1180 check_is_loaded();
1181 if (get_Method()->force_inline()) {
1182 return 1;
1183 }
1184 return code_size();
1185 }
1186
1187 // ------------------------------------------------------------------
1188 // ciMethod::instructions_size
1189 //
1190 // This is a rough metric for "fat" methods, compared before inlining
1191 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1192 // junk like exception handler, stubs, and constant table, which are
1193 // not highly relevant to an inlined method. So we use the more
1194 // specific accessor nmethod::insts_size.
1195 int ciMethod::instructions_size() {
1196 if (_instructions_size == -1) {
1197 GUARDED_VM_ENTRY(
1198 CompiledMethod* code = get_Method()->code();
1199 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1200 _instructions_size = code->insts_end() - code->verified_entry_point();
1201 } else {
1202 _instructions_size = 0;
1203 }
1204 );
1205 }
1206 return _instructions_size;
1207 }
1208
1209 // ------------------------------------------------------------------
1210 // ciMethod::log_nmethod_identity
1211 void ciMethod::log_nmethod_identity(xmlStream* log) {
1212 GUARDED_VM_ENTRY(
1213 CompiledMethod* code = get_Method()->code();
1214 if (code != NULL) {
1215 code->log_identity(log);
1216 }
1217 )
1218 }
1219
1220 // ------------------------------------------------------------------
1221 // ciMethod::is_not_reached
1222 bool ciMethod::is_not_reached(int bci) {
1223 check_is_loaded();
1224 VM_ENTRY_MARK;
1225 return Interpreter::is_not_reached(
1226 methodHandle(THREAD, get_Method()), bci);
1227 }
1228
1229 // ------------------------------------------------------------------
1230 // ciMethod::was_never_executed
1231 bool ciMethod::was_executed_more_than(int times) {
1232 VM_ENTRY_MARK;
1233 return get_Method()->was_executed_more_than(times);
1234 }
1235
1236 // ------------------------------------------------------------------
1237 // ciMethod::has_unloaded_classes_in_signature
1238 bool ciMethod::has_unloaded_classes_in_signature() {
1239 VM_ENTRY_MARK;
1240 {
1241 EXCEPTION_MARK;
1242 methodHandle m(THREAD, get_Method());
1243 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1244 if( HAS_PENDING_EXCEPTION ) {
1245 CLEAR_PENDING_EXCEPTION;
1246 return true; // Declare that we may have unloaded classes
1247 }
1248 return has_unloaded;
1249 }
1250 }
1251
1252 // ------------------------------------------------------------------
1253 // ciMethod::is_klass_loaded
1254 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1255 VM_ENTRY_MARK;
1256 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1257 }
1258
1259 // ------------------------------------------------------------------
1260 // ciMethod::check_call
1261 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1262 // This method is used only in C2 from InlineTree::ok_to_inline,
1263 // and is only used under -Xcomp.
1264 // It appears to fail when applied to an invokeinterface call site.
1265 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1266 VM_ENTRY_MARK;
1267 {
1268 EXCEPTION_MARK;
1269 HandleMark hm(THREAD);
1270 constantPoolHandle pool (THREAD, get_Method()->constants());
1271 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1272 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1273 if (HAS_PENDING_EXCEPTION) {
1274 CLEAR_PENDING_EXCEPTION;
1275 return false;
1276 } else {
1277 return (spec_method->is_static() == is_static);
1278 }
1279 }
1280 return false;
1281 }
1282
1283 // ------------------------------------------------------------------
1284 // ciMethod::profile_aging
1285 //
1286 // Should the method be compiled with an age counter?
1287 bool ciMethod::profile_aging() const {
1288 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1289 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1290 }
1291 // ------------------------------------------------------------------
1292 // ciMethod::print_codes
1293 //
1294 // Print the bytecodes for this method.
1295 void ciMethod::print_codes_on(outputStream* st) {
1296 check_is_loaded();
1297 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1298 }
1299
1300
1301 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1302 check_is_loaded(); \
1303 VM_ENTRY_MARK; \
1304 return get_Method()->flag_accessor(); \
1305 }
1306
1307 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1308 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1309 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1310 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1311 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1312 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1313 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1314 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1315
1316 bool ciMethod::is_boxing_method() const {
1317 if (holder()->is_box_klass()) {
1318 switch (intrinsic_id()) {
1319 case vmIntrinsics::_Boolean_valueOf:
1320 case vmIntrinsics::_Byte_valueOf:
1321 case vmIntrinsics::_Character_valueOf:
1322 case vmIntrinsics::_Short_valueOf:
1323 case vmIntrinsics::_Integer_valueOf:
1324 case vmIntrinsics::_Long_valueOf:
1325 case vmIntrinsics::_Float_valueOf:
1326 case vmIntrinsics::_Double_valueOf:
1327 return true;
1328 default:
1329 return false;
1330 }
1331 }
1332 return false;
1333 }
1334
1335 bool ciMethod::is_unboxing_method() const {
1336 if (holder()->is_box_klass()) {
1337 switch (intrinsic_id()) {
1338 case vmIntrinsics::_booleanValue:
1339 case vmIntrinsics::_byteValue:
1340 case vmIntrinsics::_charValue:
1341 case vmIntrinsics::_shortValue:
1342 case vmIntrinsics::_intValue:
1343 case vmIntrinsics::_longValue:
1344 case vmIntrinsics::_floatValue:
1345 case vmIntrinsics::_doubleValue:
1346 return true;
1347 default:
1348 return false;
1349 }
1350 }
1351 return false;
1352 }
1353
1354 BCEscapeAnalyzer *ciMethod::get_bcea() {
1355 #ifdef COMPILER2
1356 if (_bcea == NULL) {
1357 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1358 }
1359 return _bcea;
1360 #else // COMPILER2
1361 ShouldNotReachHere();
1362 return NULL;
1363 #endif // COMPILER2
1364 }
1365
1366 ciMethodBlocks *ciMethod::get_method_blocks() {
1367 Arena *arena = CURRENT_ENV->arena();
1368 if (_method_blocks == NULL) {
1369 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1370 }
1371 return _method_blocks;
1372 }
1373
1374 #undef FETCH_FLAG_FROM_VM
1375
1376 void ciMethod::dump_name_as_ascii(outputStream* st) {
1377 Method* method = get_Method();
1378 st->print("%s %s %s",
1379 method->klass_name()->as_quoted_ascii(),
1380 method->name()->as_quoted_ascii(),
1381 method->signature()->as_quoted_ascii());
1382 }
1383
1384 void ciMethod::dump_replay_data(outputStream* st) {
1385 ResourceMark rm;
1386 Method* method = get_Method();
1387 MethodCounters* mcs = method->method_counters();
1388 st->print("ciMethod ");
1389 dump_name_as_ascii(st);
1390 st->print_cr(" %d %d %d %d %d",
1391 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1392 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1393 interpreter_invocation_count(),
1394 interpreter_throwout_count(),
1395 _instructions_size);
1396 }
1397
1398 // ------------------------------------------------------------------
1399 // ciMethod::print_codes
1400 //
1401 // Print a range of the bytecodes for this method.
1402 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1403 check_is_loaded();
1404 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1405 }
1406
1407 // ------------------------------------------------------------------
1408 // ciMethod::print_name
1409 //
1410 // Print the name of this method, including signature and some flags.
1411 void ciMethod::print_name(outputStream* st) {
1412 check_is_loaded();
1413 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1414 }
1415
1416 // ------------------------------------------------------------------
1417 // ciMethod::print_short_name
1418 //
1419 // Print the name of this method, without signature.
1420 void ciMethod::print_short_name(outputStream* st) {
1421 if (is_loaded()) {
1422 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1423 } else {
1424 // Fall back if method is not loaded.
1425 holder()->print_name_on(st);
1426 st->print("::");
1427 name()->print_symbol_on(st);
1428 if (WizardMode)
1429 signature()->as_symbol()->print_symbol_on(st);
1430 }
1431 }
1432
1433 // ------------------------------------------------------------------
1434 // ciMethod::print_impl
1435 //
1436 // Implementation of the print method.
1437 void ciMethod::print_impl(outputStream* st) {
1438 ciMetadata::print_impl(st);
1439 st->print(" name=");
1440 name()->print_symbol_on(st);
1441 st->print(" holder=");
1442 holder()->print_name_on(st);
1443 st->print(" signature=");
1444 signature()->as_symbol()->print_symbol_on(st);
1445 if (is_loaded()) {
1446 st->print(" loaded=true");
1447 st->print(" arg_size=%d", arg_size());
1448 st->print(" flags=");
1449 flags().print_member_flags(st);
1450 } else {
1451 st->print(" loaded=false");
1452 }
1453 }
1454
1455 // ------------------------------------------------------------------
1456
1457 static BasicType erase_to_word_type(BasicType bt) {
1458 if (is_subword_type(bt)) return T_INT;
1459 if (is_reference_type(bt)) return T_OBJECT;
1460 return bt;
1461 }
1462
1463 static bool basic_types_match(ciType* t1, ciType* t2) {
1464 if (t1 == t2) return true;
1465 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1466 }
1467
1468 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1469 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1470 !resolved_method->is_method_handle_intrinsic();
1471
1472 if (!invoke_through_mh_intrinsic) {
1473 // Method name & descriptor should stay the same.
1474 // Signatures may reference unloaded types and thus they may be not strictly equal.
1475 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1476 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1477
1478 return (declared_method->name()->equals(resolved_method->name())) &&
1479 (declared_signature->equals(resolved_signature));
1480 }
1481
1482 ciMethod* linker = declared_method;
1483 ciMethod* target = resolved_method;
1484 // Linkers have appendix argument which is not passed to callee.
1485 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1486 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1487 return false; // argument slot count mismatch
1488 }
1489
1490 ciSignature* linker_sig = linker->signature();
1491 ciSignature* target_sig = target->signature();
1492
1493 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1494 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1495 return false; // argument count mismatch
1496 }
1497
1498 int sbase = 0, rbase = 0;
1499 switch (linker->intrinsic_id()) {
1500 case vmIntrinsics::_linkToVirtual:
1501 case vmIntrinsics::_linkToInterface:
1502 case vmIntrinsics::_linkToSpecial: {
1503 if (target->is_static()) {
1504 return false;
1505 }
1506 if (linker_sig->type_at(0)->is_primitive_type()) {
1507 return false; // receiver should be an oop
1508 }
1509 sbase = 1; // skip receiver
1510 break;
1511 }
1512 case vmIntrinsics::_linkToStatic: {
1513 if (!target->is_static()) {
1514 return false;
1515 }
1516 break;
1517 }
1518 case vmIntrinsics::_invokeBasic: {
1519 if (target->is_static()) {
1520 if (target_sig->type_at(0)->is_primitive_type()) {
1521 return false; // receiver should be an oop
1522 }
1523 rbase = 1; // skip receiver
1524 }
1525 break;
1526 }
1527 default:
1528 break;
1529 }
1530 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1531 int arg_count = target_sig->count() - rbase;
1532 for (int i = 0; i < arg_count; i++) {
1533 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1534 return false;
1535 }
1536 }
1537 // Only check the return type if the symbolic info has non-void return type.
1538 // I.e. the return value of the resolved method can be dropped.
1539 if (!linker->return_type()->is_void() &&
1540 !basic_types_match(linker->return_type(), target->return_type())) {
1541 return false;
1542 }
1543 return true; // no mismatch found
1544 }
1545
1546 // ------------------------------------------------------------------