1 /*
2 * Copyright (c) 1999, 2023, 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/ciSymbols.hpp"
36 #include "ci/ciUtilities.inline.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/compilerDefinitions.inline.hpp"
39 #include "compiler/methodLiveness.hpp"
40 #include "interpreter/interpreter.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "interpreter/oopMapCache.hpp"
43 #include "logging/log.hpp"
44 #include "logging/logStream.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "oops/generateOopMap.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "prims/methodHandles.hpp"
51 #include "runtime/deoptimization.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "utilities/bitMap.inline.hpp"
54 #include "utilities/xmlstream.hpp"
55 #ifdef COMPILER2
56 #include "ci/bcEscapeAnalyzer.hpp"
57 #include "ci/ciTypeFlow.hpp"
58 #include "oops/method.hpp"
59 #endif
60
61 // ciMethod
62 //
63 // This class represents a Method* in the HotSpot virtual
64 // machine.
65
66
67 // ------------------------------------------------------------------
68 // ciMethod::ciMethod
69 //
70 // Loaded method.
71 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
72 ciMetadata(h_m()),
73 _holder(holder)
74 {
75 assert(h_m() != nullptr, "no null method");
76 assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
77
78 // These fields are always filled in in loaded methods.
79 _flags = ciFlags(h_m->access_flags());
80
81 // Easy to compute, so fill them in now.
82 _max_stack = h_m->max_stack();
83 _max_locals = h_m->max_locals();
84 _code_size = h_m->code_size();
85 _handler_count = h_m->exception_table_length();
86 _size_of_parameters = h_m->size_of_parameters();
87 _uses_monitors = h_m->has_monitor_bytecodes();
88 _balanced_monitors = !_uses_monitors || h_m->guaranteed_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 = nullptr;
96 _exception_handlers = nullptr;
97 _liveness = nullptr;
98 _method_blocks = nullptr;
99 #if defined(COMPILER2)
100 _flow = nullptr;
101 _bcea = nullptr;
102 #endif // COMPILER2
103
104 // Check for blackhole intrinsic and then populate the intrinsic ID.
105 CompilerOracle::tag_blackhole_if_possible(h_m);
106 _intrinsic_id = h_m->intrinsic_id();
107
108 ciEnv *env = CURRENT_ENV;
109 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
110 // 6328518 check hotswap conditions under the right lock.
111 MutexLocker locker(Compile_lock);
112 if (Dependencies::check_evol_method(h_m()) != nullptr) {
113 _is_c1_compilable = false;
114 _is_c2_compilable = false;
115 _can_be_parsed = false;
116 }
117 } else {
118 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
119 }
120
121 if (h_m->method_holder()->is_linked()) {
122 _can_be_statically_bound = h_m->can_be_statically_bound();
123 _can_omit_stack_trace = h_m->can_omit_stack_trace();
124 } else {
125 // Have to use a conservative value in this case.
126 _can_be_statically_bound = false;
127 _can_omit_stack_trace = true;
128 }
129
130 // Adjust the definition of this condition to be more useful:
131 // %%% take these conditions into account in vtable generation
132 if (!_can_be_statically_bound && h_m->is_private())
133 _can_be_statically_bound = true;
134 if (_can_be_statically_bound && h_m->is_abstract())
135 _can_be_statically_bound = false;
136
137 // generating _signature may allow GC and therefore move m.
138 // These fields are always filled in.
139 _name = env->get_symbol(h_m->name());
140 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
141 constantPoolHandle cpool(Thread::current(), h_m->constants());
142 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
143 _method_data = nullptr;
144 // Take a snapshot of these values, so they will be commensurate with the MDO.
145 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
146 int invcnt = h_m->interpreter_invocation_count();
147 // if the value overflowed report it as max int
148 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
149 _interpreter_throwout_count = h_m->interpreter_throwout_count();
150 } else {
151 _interpreter_invocation_count = 0;
152 _interpreter_throwout_count = 0;
153 }
154 if (_interpreter_invocation_count == 0)
155 _interpreter_invocation_count = 1;
156 _inline_instructions_size = -1;
157 if (ReplayCompiles) {
158 ciReplay::initialize(this);
159 }
160 }
161
162
163 // ------------------------------------------------------------------
164 // ciMethod::ciMethod
165 //
166 // Unloaded method.
167 ciMethod::ciMethod(ciInstanceKlass* holder,
168 ciSymbol* name,
169 ciSymbol* signature,
170 ciInstanceKlass* accessor) :
171 ciMetadata((Metadata*)nullptr),
172 _name( name),
173 _holder( holder),
174 _method_data( nullptr),
175 _method_blocks( nullptr),
176 _intrinsic_id( vmIntrinsics::_none),
177 _inline_instructions_size(-1),
178 _can_be_statically_bound(false),
179 _can_omit_stack_trace(true),
180 _liveness( nullptr)
181 #if defined(COMPILER2)
182 ,
183 _flow( nullptr),
184 _bcea( nullptr)
185 #endif // COMPILER2
186 {
187 // Usually holder and accessor are the same type but in some cases
188 // the holder has the wrong class loader (e.g. invokedynamic call
189 // sites) so we pass the accessor.
190 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
191 }
192
193
194 // ------------------------------------------------------------------
195 // ciMethod::load_code
196 //
197 // Load the bytecodes and exception handler table for this method.
198 void ciMethod::load_code() {
199 VM_ENTRY_MARK;
200 assert(is_loaded(), "only loaded methods have code");
201
202 Method* me = get_Method();
203 Arena* arena = CURRENT_THREAD_ENV->arena();
204
205 // Load the bytecodes.
206 _code = (address)arena->Amalloc(code_size());
207 memcpy(_code, me->code_base(), code_size());
208
209 #if INCLUDE_JVMTI
210 // Revert any breakpoint bytecodes in ci's copy
211 if (me->number_of_breakpoints() > 0) {
212 BreakpointInfo* bp = me->method_holder()->breakpoints();
213 for (; bp != nullptr; bp = bp->next()) {
214 if (bp->match(me)) {
215 code_at_put(bp->bci(), bp->orig_bytecode());
216 }
217 }
218 }
219 #endif
220
221 // And load the exception table.
222 ExceptionTable exc_table(me);
223
224 // Allocate one extra spot in our list of exceptions. This
225 // last entry will be used to represent the possibility that
226 // an exception escapes the method. See ciExceptionHandlerStream
227 // for details.
228 _exception_handlers =
229 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
230 * (_handler_count + 1));
231 if (_handler_count > 0) {
232 for (int i=0; i<_handler_count; i++) {
233 _exception_handlers[i] = new (arena) ciExceptionHandler(
234 holder(),
235 /* start */ exc_table.start_pc(i),
236 /* limit */ exc_table.end_pc(i),
237 /* goto pc */ exc_table.handler_pc(i),
238 /* cp index */ exc_table.catch_type_index(i));
239 }
240 }
241
242 // Put an entry at the end of our list to represent the possibility
243 // of exceptional exit.
244 _exception_handlers[_handler_count] =
245 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
246
247 if (CIPrintMethodCodes) {
248 print_codes();
249 }
250 }
251
252
253 // ------------------------------------------------------------------
254 // ciMethod::has_linenumber_table
255 //
256 // length unknown until decompression
257 bool ciMethod::has_linenumber_table() const {
258 check_is_loaded();
259 VM_ENTRY_MARK;
260 return get_Method()->has_linenumber_table();
261 }
262
263
264 // ------------------------------------------------------------------
265 // ciMethod::line_number_from_bci
266 int ciMethod::line_number_from_bci(int bci) const {
267 check_is_loaded();
268 VM_ENTRY_MARK;
269 return get_Method()->line_number_from_bci(bci);
270 }
271
272
273 // ------------------------------------------------------------------
274 // ciMethod::vtable_index
275 //
276 // Get the position of this method's entry in the vtable, if any.
277 int ciMethod::vtable_index() {
278 check_is_loaded();
279 assert(holder()->is_linked(), "must be linked");
280 VM_ENTRY_MARK;
281 return get_Method()->vtable_index();
282 }
283
284 // ------------------------------------------------------------------
285 // ciMethod::uses_balanced_monitors
286 //
287 // Does this method use monitors in a strict stack-disciplined manner?
288 bool ciMethod::has_balanced_monitors() {
289 check_is_loaded();
290 if (_balanced_monitors) return true;
291
292 // Analyze the method to see if monitors are used properly.
293 VM_ENTRY_MARK;
294 methodHandle method(THREAD, get_Method());
295 assert(method->has_monitor_bytecodes(), "should have checked this");
296
297 // Check to see if a previous compilation computed the
298 // monitor-matching analysis.
299 if (method->guaranteed_monitor_matching()) {
300 _balanced_monitors = true;
301 return true;
302 }
303
304 {
305 ExceptionMark em(THREAD);
306 ResourceMark rm(THREAD);
307 GeneratePairingInfo gpi(method);
308 if (!gpi.compute_map(THREAD)) {
309 fatal("Unrecoverable verification or out-of-memory error");
310 }
311 if (!gpi.monitor_safe()) {
312 return false;
313 }
314 method->set_guaranteed_monitor_matching();
315 _balanced_monitors = true;
316 }
317 return true;
318 }
319
320
321 // ------------------------------------------------------------------
322 // ciMethod::get_flow_analysis
323 ciTypeFlow* ciMethod::get_flow_analysis() {
324 #if defined(COMPILER2)
325 if (_flow == nullptr) {
326 ciEnv* env = CURRENT_ENV;
327 _flow = new (env->arena()) ciTypeFlow(env, this);
328 _flow->do_flow();
329 }
330 return _flow;
331 #else // COMPILER2
332 ShouldNotReachHere();
333 return nullptr;
334 #endif // COMPILER2
335 }
336
337
338 // ------------------------------------------------------------------
339 // ciMethod::get_osr_flow_analysis
340 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
341 #if defined(COMPILER2)
342 // OSR entry points are always place after a call bytecode of some sort
343 assert(osr_bci >= 0, "must supply valid OSR entry point");
344 ciEnv* env = CURRENT_ENV;
345 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
346 flow->do_flow();
347 return flow;
348 #else // COMPILER2
349 ShouldNotReachHere();
350 return nullptr;
351 #endif // COMPILER2
352 }
353
354 // ------------------------------------------------------------------
355 // ciMethod::raw_liveness_at_bci
356 //
357 // Which local variables are live at a specific bci?
358 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
359 check_is_loaded();
360 if (_liveness == nullptr) {
361 // Create the liveness analyzer.
362 Arena* arena = CURRENT_ENV->arena();
363 _liveness = new (arena) MethodLiveness(arena, this);
364 _liveness->compute_liveness();
365 }
366 return _liveness->get_liveness_at(bci);
367 }
368
369 // ------------------------------------------------------------------
370 // ciMethod::liveness_at_bci
371 //
372 // Which local variables are live at a specific bci? When debugging
373 // will return true for all locals in some cases to improve debug
374 // information.
375 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
376 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
377 // Keep all locals live for the user's edification and amusement.
378 MethodLivenessResult result(_max_locals);
379 result.set_range(0, _max_locals);
380 result.set_is_valid();
381 return result;
382 }
383 return raw_liveness_at_bci(bci);
384 }
385
386 // ciMethod::live_local_oops_at_bci
387 //
388 // find all the live oops in the locals array for a particular bci
389 // Compute what the interpreter believes by using the interpreter
390 // oopmap generator. This is used as a double check during osr to
391 // guard against conservative result from MethodLiveness making us
392 // think a dead oop is live. MethodLiveness is conservative in the
393 // sense that it may consider locals to be live which cannot be live,
394 // like in the case where a local could contain an oop or a primitive
395 // along different paths. In that case the local must be dead when
396 // those paths merge. Since the interpreter's viewpoint is used when
397 // gc'ing an interpreter frame we need to use its viewpoint during
398 // OSR when loading the locals.
399
400 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
401 VM_ENTRY_MARK;
402 InterpreterOopMap mask;
403 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
404 int mask_size = max_locals();
405 ResourceBitMap result(mask_size);
406 int i;
407 for (i = 0; i < mask_size ; i++ ) {
408 if (mask.is_oop(i)) result.set_bit(i);
409 }
410 return result;
411 }
412
413
414 #ifdef COMPILER1
415 // ------------------------------------------------------------------
416 // ciMethod::bci_block_start
417 //
418 // Marks all bcis where a new basic block starts
419 const BitMap& ciMethod::bci_block_start() {
420 check_is_loaded();
421 if (_liveness == nullptr) {
422 // Create the liveness analyzer.
423 Arena* arena = CURRENT_ENV->arena();
424 _liveness = new (arena) MethodLiveness(arena, this);
425 _liveness->compute_liveness();
426 }
427
428 return _liveness->get_bci_block_start();
429 }
430 #endif // COMPILER1
431
432
433 // ------------------------------------------------------------------
434 // ciMethod::check_overflow
435 //
436 // Check whether the profile counter is overflowed and adjust if true.
437 // For invoke* it will turn negative values into max_jint,
438 // and for checkcast/aastore/instanceof turn positive values into min_jint.
439 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
440 switch (code) {
441 case Bytecodes::_aastore: // fall-through
442 case Bytecodes::_checkcast: // fall-through
443 case Bytecodes::_instanceof: {
444 if (VM_Version::profile_all_receivers_at_type_check()) {
445 return (c < 0 ? max_jint : c); // always non-negative
446 }
447 return (c > 0 ? min_jint : c); // always non-positive
448 }
449 default: {
450 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
451 return (c < 0 ? max_jint : c); // always non-negative
452 }
453 }
454 }
455
456
457 // ------------------------------------------------------------------
458 // ciMethod::call_profile_at_bci
459 //
460 // Get the ciCallProfile for the invocation of this method.
461 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
462 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
463 ResourceMark rm;
464 ciCallProfile result;
465 if (method_data() != nullptr && method_data()->is_mature()) {
466 ciProfileData* data = method_data()->bci_to_data(bci);
467 if (data != nullptr && data->is_CounterData()) {
468 // Every profiled call site has a counter.
469 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
470
471 if (!data->is_ReceiverTypeData()) {
472 result._receiver_count[0] = 0; // that's a definite zero
473 } else { // ReceiverTypeData is a subclass of CounterData
474 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
475 // In addition, virtual call sites have receiver type information
476 int receivers_count_total = 0;
477 int morphism = 0;
478 // Precompute morphism for the possible fixup
479 for (uint i = 0; i < call->row_limit(); i++) {
480 ciKlass* receiver = call->receiver(i);
481 if (receiver == nullptr) continue;
482 morphism++;
483 }
484 int epsilon = 0;
485 // For a call, it is assumed that either the type of the receiver(s)
486 // is recorded or an associated counter is incremented, but not both. With
487 // tiered compilation, however, both can happen due to the interpreter and
488 // C1 profiling invocations differently. Address that inconsistency here.
489 if (morphism == 1 && count > 0) {
490 epsilon = count;
491 count = 0;
492 }
493 for (uint i = 0; i < call->row_limit(); i++) {
494 ciKlass* receiver = call->receiver(i);
495 if (receiver == nullptr) continue;
496 int rcount = saturated_add(call->receiver_count(i), epsilon);
497 if (rcount == 0) rcount = 1; // Should be valid value
498 receivers_count_total = saturated_add(receivers_count_total, rcount);
499 // Add the receiver to result data.
500 result.add_receiver(receiver, rcount);
501 // If we extend profiling to record methods,
502 // we will set result._method also.
503 }
504 // Determine call site's morphism.
505 // The call site count is 0 with known morphism (only 1 or 2 receivers)
506 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
507 // The call site count is > 0 in the case of a polymorphic virtual call.
508 if (morphism > 0 && morphism == result._limit) {
509 // The morphism <= MorphismLimit.
510 if ((morphism < ciCallProfile::MorphismLimit) ||
511 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
512 #ifdef ASSERT
513 if (count > 0) {
514 this->print_short_name(tty);
515 tty->print_cr(" @ bci:%d", bci);
516 this->print_codes();
517 assert(false, "this call site should not be polymorphic");
518 }
519 #endif
520 result._morphism = morphism;
521 }
522 }
523 // Make the count consistent if this is a call profile. If count is
524 // zero or less, presume that this is a typecheck profile and
525 // do nothing. Otherwise, increase count to be the sum of all
526 // receiver's counts.
527 if (count >= 0) {
528 count = saturated_add(count, receivers_count_total);
529 }
530 }
531 result._count = count;
532 }
533 }
534 return result;
535 }
536
537 // ------------------------------------------------------------------
538 // Add new receiver and sort data by receiver's profile count.
539 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
540 // Add new receiver and sort data by receiver's counts when we have space
541 // for it otherwise replace the less called receiver (less called receiver
542 // is placed to the last array element which is not used).
543 // First array's element contains most called receiver.
544 int i = _limit;
545 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
546 _receiver[i] = _receiver[i-1];
547 _receiver_count[i] = _receiver_count[i-1];
548 }
549 _receiver[i] = receiver;
550 _receiver_count[i] = receiver_count;
551 if (_limit < MorphismLimit) _limit++;
552 }
553
554
555 void ciMethod::assert_virtual_call_type_ok(int bci) {
556 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
557 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
558 }
559
560 void ciMethod::assert_call_type_ok(int bci) {
561 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
562 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
563 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
564 }
565
566 /**
567 * Check whether profiling provides a type for the argument i to the
568 * call at bci bci
569 *
570 * @param [in]bci bci of the call
571 * @param [in]i argument number
572 * @param [out]type profiled type of argument, null if none
573 * @param [out]ptr_kind whether always null, never null or maybe null
574 * @return true if profiling exists
575 *
576 */
577 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
578 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
579 ciProfileData* data = method_data()->bci_to_data(bci);
580 if (data != nullptr) {
581 if (data->is_VirtualCallTypeData()) {
582 assert_virtual_call_type_ok(bci);
583 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
584 if (i >= call->number_of_arguments()) {
585 return false;
586 }
587 type = call->valid_argument_type(i);
588 ptr_kind = call->argument_ptr_kind(i);
589 return true;
590 } else if (data->is_CallTypeData()) {
591 assert_call_type_ok(bci);
592 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
593 if (i >= call->number_of_arguments()) {
594 return false;
595 }
596 type = call->valid_argument_type(i);
597 ptr_kind = call->argument_ptr_kind(i);
598 return true;
599 }
600 }
601 }
602 return false;
603 }
604
605 /**
606 * Check whether profiling provides a type for the return value from
607 * the call at bci bci
608 *
609 * @param [in]bci bci of the call
610 * @param [out]type profiled type of argument, null if none
611 * @param [out]ptr_kind whether always null, never null or maybe null
612 * @return true if profiling exists
613 *
614 */
615 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
616 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) {
617 ciProfileData* data = method_data()->bci_to_data(bci);
618 if (data != nullptr) {
619 if (data->is_VirtualCallTypeData()) {
620 assert_virtual_call_type_ok(bci);
621 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
622 if (call->has_return()) {
623 type = call->valid_return_type();
624 ptr_kind = call->return_ptr_kind();
625 return true;
626 }
627 } else if (data->is_CallTypeData()) {
628 assert_call_type_ok(bci);
629 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
630 if (call->has_return()) {
631 type = call->valid_return_type();
632 ptr_kind = call->return_ptr_kind();
633 }
634 return true;
635 }
636 }
637 }
638 return false;
639 }
640
641 /**
642 * Check whether profiling provides a type for the parameter i
643 *
644 * @param [in]i parameter number
645 * @param [out]type profiled type of parameter, null if none
646 * @param [out]ptr_kind whether always null, never null or maybe null
647 * @return true if profiling exists
648 *
649 */
650 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
651 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
652 ciParametersTypeData* parameters = method_data()->parameters_type_data();
653 if (parameters != nullptr && i < parameters->number_of_parameters()) {
654 type = parameters->valid_parameter_type(i);
655 ptr_kind = parameters->parameter_ptr_kind(i);
656 return true;
657 }
658 }
659 return false;
660 }
661
662
663 // ------------------------------------------------------------------
664 // ciMethod::find_monomorphic_target
665 //
666 // Given a certain calling environment, find the monomorphic target
667 // for the call. Return null if the call is not monomorphic in
668 // its calling environment, or if there are only abstract methods.
669 // The returned method is never abstract.
670 // Note: If caller uses a non-null result, it must inform dependencies
671 // via assert_unique_concrete_method or assert_leaf_type.
672 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
673 ciInstanceKlass* callee_holder,
674 ciInstanceKlass* actual_recv,
675 bool check_access) {
676 check_is_loaded();
677
678 if (actual_recv->is_interface()) {
679 // %%% We cannot trust interface types, yet. See bug 6312651.
680 return nullptr;
681 }
682
683 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
684 if (root_m == nullptr) {
685 // Something went wrong looking up the actual receiver method.
686 return nullptr;
687 }
688
689 // Make certain quick checks even if UseCHA is false.
690
691 // Is it private or final?
692 if (root_m->can_be_statically_bound()) {
693 assert(!root_m->is_abstract(), "sanity");
694 return root_m;
695 }
696
697 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
698 // Easy case. There is no other place to put a method, so don't bother
699 // to go through the VM_ENTRY_MARK and all the rest.
700 if (root_m->is_abstract()) {
701 return nullptr;
702 }
703 return root_m;
704 }
705
706 // Array methods (clone, hashCode, etc.) are always statically bound.
707 // If we were to see an array type here, we'd return root_m.
708 // However, this method processes only ciInstanceKlasses. (See 4962591.)
709 // The inline_native_clone intrinsic narrows Object to T[] properly,
710 // so there is no need to do the same job here.
711
712 if (!UseCHA) return nullptr;
713
714 VM_ENTRY_MARK;
715
716 methodHandle target;
717 {
718 MutexLocker locker(Compile_lock);
719 InstanceKlass* context = actual_recv->get_instanceKlass();
720 if (UseVtableBasedCHA) {
721 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
722 root_m->get_Method(),
723 callee_holder->get_Klass(),
724 this->get_Method()));
725 } else {
726 if (root_m->is_abstract()) {
727 return nullptr; // not supported
728 }
729 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context, root_m->get_Method()));
730 }
731 assert(target() == nullptr || !target()->is_abstract(), "not allowed");
732 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
733 }
734
735 #ifndef PRODUCT
736 LogTarget(Debug, dependencies) lt;
737 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) {
738 LogStream ls(<);
739 ls.print("found a non-root unique target method");
740 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name());
741 ls.print(" method = ");
742 target->print_short_name(&ls);
743 ls.cr();
744 }
745 #endif //PRODUCT
746
747 if (target() == nullptr) {
748 return nullptr;
749 }
750 if (target() == root_m->get_Method()) {
751 return root_m;
752 }
753 if (!root_m->is_public() &&
754 !root_m->is_protected()) {
755 // If we are going to reason about inheritance, it's easiest
756 // if the method in question is public, protected, or private.
757 // If the answer is not root_m, it is conservatively correct
758 // to return null, even if the CHA encountered irrelevant
759 // methods in other packages.
760 // %%% TO DO: Work out logic for package-private methods
761 // with the same name but different vtable indexes.
762 return nullptr;
763 }
764 return CURRENT_THREAD_ENV->get_method(target());
765 }
766
767 // ------------------------------------------------------------------
768 // ciMethod::can_be_statically_bound
769 //
770 // Tries to determine whether a method can be statically bound in some context.
771 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
772 return (holder() == context) && can_be_statically_bound();
773 }
774
775 // ------------------------------------------------------------------
776 // ciMethod::can_omit_stack_trace
777 //
778 // Tries to determine whether a method can omit stack trace in throw in compiled code.
779 bool ciMethod::can_omit_stack_trace() const {
780 if (!StackTraceInThrowable) {
781 return true; // stack trace is switched off.
782 }
783 if (!OmitStackTraceInFastThrow) {
784 return false; // Have to provide stack trace.
785 }
786 return _can_omit_stack_trace;
787 }
788
789 // ------------------------------------------------------------------
790 // ciMethod::resolve_invoke
791 //
792 // Given a known receiver klass, find the target for the call.
793 // Return null if the call has no target or the target is abstract.
794 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
795 check_is_loaded();
796 VM_ENTRY_MARK;
797
798 Klass* caller_klass = caller->get_Klass();
799 Klass* recv = exact_receiver->get_Klass();
800 Klass* resolved = holder()->get_Klass();
801 Symbol* h_name = name()->get_symbol();
802 Symbol* h_signature = signature()->get_symbol();
803
804 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
805 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
806 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
807 Method* m = nullptr;
808 // Only do exact lookup if receiver klass has been linked. Otherwise,
809 // the vtable has not been setup, and the LinkResolver will fail.
810 if (recv->is_array_klass()
811 ||
812 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
813 if (holder()->is_interface()) {
814 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
815 } else {
816 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
817 }
818 }
819
820 if (m == nullptr) {
821 // Return null only if there was a problem with lookup (uninitialized class, etc.)
822 return nullptr;
823 }
824
825 ciMethod* result = this;
826 if (m != get_Method()) {
827 result = CURRENT_THREAD_ENV->get_method(m);
828 }
829
830 if (result->is_abstract() && !allow_abstract) {
831 // Don't return abstract methods because they aren't optimizable or interesting.
832 return nullptr;
833 }
834 return result;
835 }
836
837 // ------------------------------------------------------------------
838 // ciMethod::resolve_vtable_index
839 //
840 // Given a known receiver klass, find the vtable index for the call.
841 // Return Method::invalid_vtable_index if the vtable_index is unknown.
842 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
843 check_is_loaded();
844
845 int vtable_index = Method::invalid_vtable_index;
846 // Only do lookup if receiver klass has been linked. Otherwise,
847 // the vtable has not been setup, and the LinkResolver will fail.
848 if (!receiver->is_interface()
849 && (!receiver->is_instance_klass() ||
850 receiver->as_instance_klass()->is_linked())) {
851 VM_ENTRY_MARK;
852
853 Klass* caller_klass = caller->get_Klass();
854 Klass* recv = receiver->get_Klass();
855 Symbol* h_name = name()->get_symbol();
856 Symbol* h_signature = signature()->get_symbol();
857
858 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
859 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
860 if (vtable_index == Method::nonvirtual_vtable_index) {
861 // A statically bound method. Return "no such index".
862 vtable_index = Method::invalid_vtable_index;
863 }
864 }
865
866 return vtable_index;
867 }
868
869 // ------------------------------------------------------------------
870 // ciMethod::get_field_at_bci
871 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
872 ciBytecodeStream iter(this);
873 iter.reset_to_bci(bci);
874 iter.next();
875 return iter.get_field(will_link);
876 }
877
878 // ------------------------------------------------------------------
879 // ciMethod::get_method_at_bci
880 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
881 ciBytecodeStream iter(this);
882 iter.reset_to_bci(bci);
883 iter.next();
884 return iter.get_method(will_link, declared_signature);
885 }
886
887 // ------------------------------------------------------------------
888 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
889 ciBytecodeStream iter(this);
890 iter.reset_to_bci(bci);
891 iter.next();
892 return iter.get_declared_method_holder();
893 }
894
895 // ------------------------------------------------------------------
896 // Adjust a CounterData count to be commensurate with
897 // interpreter_invocation_count. If the MDO exists for
898 // only 25% of the time the method exists, then the
899 // counts in the MDO should be scaled by 4X, so that
900 // they can be usefully and stably compared against the
901 // invocation counts in methods.
902 int ciMethod::scale_count(int count, float prof_factor) {
903 if (count > 0 && method_data() != nullptr) {
904 int counter_life = method_data()->invocation_count();
905 int method_life = interpreter_invocation_count();
906 if (method_life < counter_life) { // may happen because of the snapshot timing
907 method_life = counter_life;
908 }
909 if (counter_life > 0) {
910 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
911 count = (count > 0) ? count : 1;
912 } else {
913 count = 1;
914 }
915 }
916 return count;
917 }
918
919
920 // ------------------------------------------------------------------
921 // ciMethod::is_special_get_caller_class_method
922 //
923 bool ciMethod::is_ignored_by_security_stack_walk() const {
924 check_is_loaded();
925 VM_ENTRY_MARK;
926 return get_Method()->is_ignored_by_security_stack_walk();
927 }
928
929 // ------------------------------------------------------------------
930 // ciMethod::needs_clinit_barrier
931 //
932 bool ciMethod::needs_clinit_barrier() const {
933 check_is_loaded();
934 return is_static() && !holder()->is_initialized();
935 }
936
937 // ------------------------------------------------------------------
938 // invokedynamic support
939
940 // ------------------------------------------------------------------
941 // ciMethod::is_method_handle_intrinsic
942 //
943 // Return true if the method is an instance of the JVM-generated
944 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
945 bool ciMethod::is_method_handle_intrinsic() const {
946 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
947 return (MethodHandles::is_signature_polymorphic(iid) &&
948 MethodHandles::is_signature_polymorphic_intrinsic(iid));
949 }
950
951 // ------------------------------------------------------------------
952 // ciMethod::is_compiled_lambda_form
953 //
954 // Return true if the method is a generated MethodHandle adapter.
955 // These are built by Java code.
956 bool ciMethod::is_compiled_lambda_form() const {
957 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
958 return iid == vmIntrinsics::_compiledLambdaForm;
959 }
960
961 // ------------------------------------------------------------------
962 // ciMethod::is_object_initializer
963 //
964 bool ciMethod::is_object_initializer() const {
965 return name() == ciSymbols::object_initializer_name();
966 }
967
968 // ------------------------------------------------------------------
969 // ciMethod::has_member_arg
970 //
971 // Return true if the method is a linker intrinsic like _linkToVirtual.
972 // These are built by the JVM.
973 bool ciMethod::has_member_arg() const {
974 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
975 return (MethodHandles::is_signature_polymorphic(iid) &&
976 MethodHandles::has_member_arg(iid));
977 }
978
979 // ------------------------------------------------------------------
980 // ciMethod::ensure_method_data
981 //
982 // Generate new MethodData* objects at compile time.
983 // Return true if allocation was successful or no MDO is required.
984 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
985 EXCEPTION_CONTEXT;
986 if (is_native() || is_abstract() || h_m()->is_accessor()) {
987 return true;
988 }
989 if (h_m()->method_data() == nullptr) {
990 Method::build_profiling_method_data(h_m, THREAD);
991 if (HAS_PENDING_EXCEPTION) {
992 CLEAR_PENDING_EXCEPTION;
993 }
994 }
995 if (h_m()->method_data() != nullptr) {
996 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
997 return _method_data->load_data();
998 } else {
999 _method_data = CURRENT_ENV->get_empty_methodData();
1000 return false;
1001 }
1002 }
1003
1004 // public, retroactive version
1005 bool ciMethod::ensure_method_data() {
1006 bool result = true;
1007 if (_method_data == nullptr || _method_data->is_empty()) {
1008 GUARDED_VM_ENTRY({
1009 methodHandle mh(Thread::current(), get_Method());
1010 result = ensure_method_data(mh);
1011 });
1012 }
1013 return result;
1014 }
1015
1016
1017 // ------------------------------------------------------------------
1018 // ciMethod::method_data
1019 //
1020 ciMethodData* ciMethod::method_data() {
1021 if (_method_data != nullptr) {
1022 return _method_data;
1023 }
1024 VM_ENTRY_MARK;
1025 ciEnv* env = CURRENT_ENV;
1026 Thread* my_thread = JavaThread::current();
1027 methodHandle h_m(my_thread, get_Method());
1028
1029 if (h_m()->method_data() != nullptr) {
1030 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1031 _method_data->load_data();
1032 } else {
1033 _method_data = CURRENT_ENV->get_empty_methodData();
1034 }
1035 return _method_data;
1036
1037 }
1038
1039 // ------------------------------------------------------------------
1040 // ciMethod::method_data_or_null
1041 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1042 // null otherwise.
1043 ciMethodData* ciMethod::method_data_or_null() {
1044 ciMethodData *md = method_data();
1045 if (md->is_empty()) {
1046 return nullptr;
1047 }
1048 return md;
1049 }
1050
1051 // ------------------------------------------------------------------
1052 // ciMethod::ensure_method_counters
1053 //
1054 MethodCounters* ciMethod::ensure_method_counters() {
1055 check_is_loaded();
1056 VM_ENTRY_MARK;
1057 methodHandle mh(THREAD, get_Method());
1058 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1059 return method_counters;
1060 }
1061
1062 // ------------------------------------------------------------------
1063 // ciMethod::has_option
1064 //
1065 bool ciMethod::has_option(enum CompileCommand option) {
1066 check_is_loaded();
1067 VM_ENTRY_MARK;
1068 methodHandle mh(THREAD, get_Method());
1069 return CompilerOracle::has_option(mh, option);
1070 }
1071
1072 // ------------------------------------------------------------------
1073 // ciMethod::has_option_value
1074 //
1075 bool ciMethod::has_option_value(enum CompileCommand option, double& value) {
1076 check_is_loaded();
1077 VM_ENTRY_MARK;
1078 methodHandle mh(THREAD, get_Method());
1079 return CompilerOracle::has_option_value(mh, option, value);
1080 }
1081 // ------------------------------------------------------------------
1082 // ciMethod::can_be_compiled
1083 //
1084 // Have previous compilations of this method succeeded?
1085 bool ciMethod::can_be_compiled() {
1086 check_is_loaded();
1087 ciEnv* env = CURRENT_ENV;
1088 if (is_c1_compile(env->comp_level())) {
1089 return _is_c1_compilable;
1090 }
1091 return _is_c2_compilable;
1092 }
1093
1094 // ------------------------------------------------------------------
1095 // ciMethod::has_compiled_code
1096 bool ciMethod::has_compiled_code() {
1097 return inline_instructions_size() > 0;
1098 }
1099
1100 int ciMethod::highest_osr_comp_level() {
1101 check_is_loaded();
1102 VM_ENTRY_MARK;
1103 return get_Method()->highest_osr_comp_level();
1104 }
1105
1106 // ------------------------------------------------------------------
1107 // ciMethod::code_size_for_inlining
1108 //
1109 // Code size for inlining decisions. This method returns a code
1110 // size of 1 for methods which has the ForceInline annotation.
1111 int ciMethod::code_size_for_inlining() {
1112 check_is_loaded();
1113 if (get_Method()->force_inline()) {
1114 return 1;
1115 }
1116 return code_size();
1117 }
1118
1119 // ------------------------------------------------------------------
1120 // ciMethod::inline_instructions_size
1121 //
1122 // This is a rough metric for "fat" methods, compared before inlining
1123 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1124 // junk like exception handler, stubs, and constant table, which are
1125 // not highly relevant to an inlined method. So we use the more
1126 // specific accessor nmethod::insts_size.
1127 // Also some instructions inside the code are excluded from inline
1128 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter)
1129 int ciMethod::inline_instructions_size() {
1130 if (_inline_instructions_size == -1) {
1131 GUARDED_VM_ENTRY(
1132 CompiledMethod* code = get_Method()->code();
1133 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1134 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size();
1135 _inline_instructions_size = isize > 0 ? isize : 0;
1136 } else {
1137 _inline_instructions_size = 0;
1138 }
1139 );
1140 }
1141 return _inline_instructions_size;
1142 }
1143
1144 // ------------------------------------------------------------------
1145 // ciMethod::log_nmethod_identity
1146 void ciMethod::log_nmethod_identity(xmlStream* log) {
1147 GUARDED_VM_ENTRY(
1148 CompiledMethod* code = get_Method()->code();
1149 if (code != nullptr) {
1150 code->log_identity(log);
1151 }
1152 )
1153 }
1154
1155 // ------------------------------------------------------------------
1156 // ciMethod::is_not_reached
1157 bool ciMethod::is_not_reached(int bci) {
1158 check_is_loaded();
1159 VM_ENTRY_MARK;
1160 return Interpreter::is_not_reached(
1161 methodHandle(THREAD, get_Method()), bci);
1162 }
1163
1164 // ------------------------------------------------------------------
1165 // ciMethod::was_never_executed
1166 bool ciMethod::was_executed_more_than(int times) {
1167 VM_ENTRY_MARK;
1168 return get_Method()->was_executed_more_than(times);
1169 }
1170
1171 // ------------------------------------------------------------------
1172 // ciMethod::has_unloaded_classes_in_signature
1173 bool ciMethod::has_unloaded_classes_in_signature() {
1174 // ciSignature is resolved against some accessing class and
1175 // signature classes aren't required to be local. As a benefit,
1176 // it makes signature classes visible through loader constraints.
1177 // So, encountering an unloaded class signals it is absent both in
1178 // the callee (local) and caller contexts.
1179 return signature()->has_unloaded_classes();
1180 }
1181
1182 // ------------------------------------------------------------------
1183 // ciMethod::is_klass_loaded
1184 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1185 VM_ENTRY_MARK;
1186 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
1187 }
1188
1189 // ------------------------------------------------------------------
1190 // ciMethod::check_call
1191 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1192 // This method is used only in C2 from InlineTree::ok_to_inline,
1193 // and is only used under -Xcomp.
1194 // It appears to fail when applied to an invokeinterface call site.
1195 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1196 VM_ENTRY_MARK;
1197 {
1198 ExceptionMark em(THREAD);
1199 HandleMark hm(THREAD);
1200 constantPoolHandle pool (THREAD, get_Method()->constants());
1201 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1202 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1203 if (HAS_PENDING_EXCEPTION) {
1204 CLEAR_PENDING_EXCEPTION;
1205 return false;
1206 } else {
1207 return (spec_method->is_static() == is_static);
1208 }
1209 }
1210 return false;
1211 }
1212 // ------------------------------------------------------------------
1213 // ciMethod::print_codes
1214 //
1215 // Print the bytecodes for this method.
1216 void ciMethod::print_codes_on(outputStream* st) {
1217 check_is_loaded();
1218 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1219 }
1220
1221
1222 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1223 check_is_loaded(); \
1224 VM_ENTRY_MARK; \
1225 return get_Method()->flag_accessor(); \
1226 }
1227
1228 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1229 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1230 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1231 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1232 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1233 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1234 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1235
1236 bool ciMethod::is_boxing_method() const {
1237 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1238 switch (intrinsic_id()) {
1239 case vmIntrinsics::_Boolean_valueOf:
1240 case vmIntrinsics::_Byte_valueOf:
1241 case vmIntrinsics::_Character_valueOf:
1242 case vmIntrinsics::_Short_valueOf:
1243 case vmIntrinsics::_Integer_valueOf:
1244 case vmIntrinsics::_Long_valueOf:
1245 case vmIntrinsics::_Float_valueOf:
1246 case vmIntrinsics::_Double_valueOf:
1247 return true;
1248 default:
1249 return false;
1250 }
1251 }
1252 return false;
1253 }
1254
1255 bool ciMethod::is_unboxing_method() const {
1256 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1257 switch (intrinsic_id()) {
1258 case vmIntrinsics::_booleanValue:
1259 case vmIntrinsics::_byteValue:
1260 case vmIntrinsics::_charValue:
1261 case vmIntrinsics::_shortValue:
1262 case vmIntrinsics::_intValue:
1263 case vmIntrinsics::_longValue:
1264 case vmIntrinsics::_floatValue:
1265 case vmIntrinsics::_doubleValue:
1266 return true;
1267 default:
1268 return false;
1269 }
1270 }
1271 return false;
1272 }
1273
1274 bool ciMethod::is_vector_method() const {
1275 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1276 (intrinsic_id() != vmIntrinsics::_none);
1277 }
1278
1279 BCEscapeAnalyzer *ciMethod::get_bcea() {
1280 #ifdef COMPILER2
1281 if (_bcea == nullptr) {
1282 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr);
1283 }
1284 return _bcea;
1285 #else // COMPILER2
1286 ShouldNotReachHere();
1287 return nullptr;
1288 #endif // COMPILER2
1289 }
1290
1291 ciMethodBlocks *ciMethod::get_method_blocks() {
1292 if (_method_blocks == nullptr) {
1293 Arena *arena = CURRENT_ENV->arena();
1294 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1295 }
1296 return _method_blocks;
1297 }
1298
1299 #undef FETCH_FLAG_FROM_VM
1300
1301 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1302 st->print("%s %s %s",
1303 CURRENT_ENV->replay_name(method->method_holder()),
1304 method->name()->as_quoted_ascii(),
1305 method->signature()->as_quoted_ascii());
1306 }
1307
1308 void ciMethod::dump_name_as_ascii(outputStream* st) {
1309 Method* method = get_Method();
1310 dump_name_as_ascii(st, method);
1311 }
1312
1313 void ciMethod::dump_replay_data(outputStream* st) {
1314 ResourceMark rm;
1315 Method* method = get_Method();
1316 if (MethodHandles::is_signature_polymorphic_method(method)) {
1317 // ignore for now
1318 return;
1319 }
1320 MethodCounters* mcs = method->method_counters();
1321 st->print("ciMethod ");
1322 dump_name_as_ascii(st);
1323 st->print_cr(" %d %d %d %d %d",
1324 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(),
1325 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(),
1326 interpreter_invocation_count(),
1327 interpreter_throwout_count(),
1328 _inline_instructions_size);
1329 }
1330
1331 // ------------------------------------------------------------------
1332 // ciMethod::print_codes
1333 //
1334 // Print a range of the bytecodes for this method.
1335 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1336 check_is_loaded();
1337 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1338 }
1339
1340 // ------------------------------------------------------------------
1341 // ciMethod::print_name
1342 //
1343 // Print the name of this method, including signature and some flags.
1344 void ciMethod::print_name(outputStream* st) {
1345 check_is_loaded();
1346 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1347 }
1348
1349 // ------------------------------------------------------------------
1350 // ciMethod::print_short_name
1351 //
1352 // Print the name of this method, without signature.
1353 void ciMethod::print_short_name(outputStream* st) {
1354 if (is_loaded()) {
1355 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1356 } else {
1357 // Fall back if method is not loaded.
1358 holder()->print_name_on(st);
1359 st->print("::");
1360 name()->print_symbol_on(st);
1361 if (WizardMode)
1362 signature()->as_symbol()->print_symbol_on(st);
1363 }
1364 }
1365
1366 // ------------------------------------------------------------------
1367 // ciMethod::print_impl
1368 //
1369 // Implementation of the print method.
1370 void ciMethod::print_impl(outputStream* st) {
1371 ciMetadata::print_impl(st);
1372 st->print(" name=");
1373 name()->print_symbol_on(st);
1374 st->print(" holder=");
1375 holder()->print_name_on(st);
1376 st->print(" signature=");
1377 signature()->as_symbol()->print_symbol_on(st);
1378 if (is_loaded()) {
1379 st->print(" loaded=true");
1380 st->print(" arg_size=%d", arg_size());
1381 st->print(" flags=");
1382 flags().print_member_flags(st);
1383 } else {
1384 st->print(" loaded=false");
1385 }
1386 }
1387
1388 // ------------------------------------------------------------------
1389
1390 static BasicType erase_to_word_type(BasicType bt) {
1391 if (is_subword_type(bt)) return T_INT;
1392 if (is_reference_type(bt)) return T_OBJECT;
1393 return bt;
1394 }
1395
1396 static bool basic_types_match(ciType* t1, ciType* t2) {
1397 if (t1 == t2) return true;
1398 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1399 }
1400
1401 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1402 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1403 !resolved_method->is_method_handle_intrinsic();
1404
1405 if (!invoke_through_mh_intrinsic) {
1406 // Method name & descriptor should stay the same.
1407 // Signatures may reference unloaded types and thus they may be not strictly equal.
1408 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1409 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1410
1411 return (declared_method->name()->equals(resolved_method->name())) &&
1412 (declared_signature->equals(resolved_signature));
1413 }
1414
1415 ciMethod* linker = declared_method;
1416 ciMethod* target = resolved_method;
1417 // Linkers have appendix argument which is not passed to callee.
1418 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1419 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1420 return false; // argument slot count mismatch
1421 }
1422
1423 ciSignature* linker_sig = linker->signature();
1424 ciSignature* target_sig = target->signature();
1425
1426 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1427 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1428 return false; // argument count mismatch
1429 }
1430
1431 int sbase = 0, rbase = 0;
1432 switch (linker->intrinsic_id()) {
1433 case vmIntrinsics::_linkToVirtual:
1434 case vmIntrinsics::_linkToInterface:
1435 case vmIntrinsics::_linkToSpecial: {
1436 if (target->is_static()) {
1437 return false;
1438 }
1439 if (linker_sig->type_at(0)->is_primitive_type()) {
1440 return false; // receiver should be an oop
1441 }
1442 sbase = 1; // skip receiver
1443 break;
1444 }
1445 case vmIntrinsics::_linkToStatic: {
1446 if (!target->is_static()) {
1447 return false;
1448 }
1449 break;
1450 }
1451 case vmIntrinsics::_invokeBasic: {
1452 if (target->is_static()) {
1453 if (target_sig->type_at(0)->is_primitive_type()) {
1454 return false; // receiver should be an oop
1455 }
1456 rbase = 1; // skip receiver
1457 }
1458 break;
1459 }
1460 default:
1461 break;
1462 }
1463 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1464 int arg_count = target_sig->count() - rbase;
1465 for (int i = 0; i < arg_count; i++) {
1466 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1467 return false;
1468 }
1469 }
1470 // Only check the return type if the symbolic info has non-void return type.
1471 // I.e. the return value of the resolved method can be dropped.
1472 if (!linker->return_type()->is_void() &&
1473 !basic_types_match(linker->return_type(), target->return_type())) {
1474 return false;
1475 }
1476 return true; // no mismatch found
1477 }
1478
1479 // ------------------------------------------------------------------