1 /*
2 * Copyright (c) 1999, 2025, 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 "ci/ciCallProfile.hpp"
26 #include "ci/ciExceptionHandler.hpp"
27 #include "ci/ciInstanceKlass.hpp"
28 #include "ci/ciMethod.hpp"
29 #include "ci/ciMethodBlocks.hpp"
30 #include "ci/ciMethodData.hpp"
31 #include "ci/ciReplay.hpp"
32 #include "ci/ciStreams.hpp"
33 #include "ci/ciSymbol.hpp"
34 #include "ci/ciSymbols.hpp"
35 #include "ci/ciUtilities.inline.hpp"
36 #include "compiler/abstractCompiler.hpp"
37 #include "compiler/compilerDefinitions.inline.hpp"
38 #include "compiler/compilerOracle.hpp"
39 #include "compiler/methodLiveness.hpp"
40 #include "interpreter/interpreter.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "interpreter/oopMapCache.hpp"
43 #include "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 bool should_take_Compile_lock = !Compile_lock->owned_by_self();
112 ConditionalMutexLocker locker(Compile_lock, should_take_Compile_lock, Mutex::_safepoint_check_flag);
113 if (Dependencies::check_evol_method(h_m()) != nullptr) {
114 _is_c1_compilable = false;
115 _is_c2_compilable = false;
116 _can_be_parsed = false;
117 }
118 } else {
119 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
120 }
121
122 if (h_m->method_holder()->is_linked()) {
123 _can_be_statically_bound = h_m->can_be_statically_bound();
124 _can_omit_stack_trace = h_m->can_omit_stack_trace();
125 } else {
126 // Have to use a conservative value in this case.
127 _can_be_statically_bound = false;
128 _can_omit_stack_trace = true;
129 }
130
131 // Adjust the definition of this condition to be more useful:
132 // %%% take these conditions into account in vtable generation
133 if (!_can_be_statically_bound && h_m->is_private())
134 _can_be_statically_bound = true;
135 if (_can_be_statically_bound && h_m->is_abstract())
136 _can_be_statically_bound = false;
137
138 // generating _signature may allow GC and therefore move m.
139 // These fields are always filled in.
140 _name = env->get_symbol(h_m->name());
141 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
142 constantPoolHandle cpool(Thread::current(), h_m->constants());
143 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
144 _method_data = nullptr;
145 // Take a snapshot of these values, so they will be commensurate with the MDO.
146 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
147 int invcnt = h_m->interpreter_invocation_count();
148 // if the value overflowed report it as max int
149 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
150 _interpreter_throwout_count = h_m->interpreter_throwout_count();
151 } else {
152 _interpreter_invocation_count = 0;
153 _interpreter_throwout_count = 0;
154 }
155 if (_interpreter_invocation_count == 0)
156 _interpreter_invocation_count = 1;
157 _inline_instructions_size = -1;
158 if (ReplayCompiles) {
159 ciReplay::initialize(this);
160 }
161 }
162
163
164 // ------------------------------------------------------------------
165 // ciMethod::ciMethod
166 //
167 // Unloaded method.
168 ciMethod::ciMethod(ciInstanceKlass* holder,
169 ciSymbol* name,
170 ciSymbol* signature,
171 ciInstanceKlass* accessor) :
172 ciMetadata((Metadata*)nullptr),
173 _name( name),
174 _holder( holder),
175 _method_data( nullptr),
176 _method_blocks( nullptr),
177 _intrinsic_id( vmIntrinsics::_none),
178 _inline_instructions_size(-1),
179 _can_be_statically_bound(false),
180 _can_omit_stack_trace(true),
181 _liveness( nullptr)
182 #if defined(COMPILER2)
183 ,
184 _flow( nullptr),
185 _bcea( nullptr)
186 #endif // COMPILER2
187 {
188 // Usually holder and accessor are the same type but in some cases
189 // the holder has the wrong class loader (e.g. invokedynamic call
190 // sites) so we pass the accessor.
191 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
192 }
193
194
195 // ------------------------------------------------------------------
196 // ciMethod::load_code
197 //
198 // Load the bytecodes and exception handler table for this method.
199 void ciMethod::load_code() {
200 VM_ENTRY_MARK;
201 assert(is_loaded(), "only loaded methods have code");
202
203 Method* me = get_Method();
204 Arena* arena = CURRENT_THREAD_ENV->arena();
205
206 // Load the bytecodes.
207 _code = (address)arena->Amalloc(code_size());
208 memcpy(_code, me->code_base(), code_size());
209
210 #if INCLUDE_JVMTI
211 // Revert any breakpoint bytecodes in ci's copy
212 if (me->number_of_breakpoints() > 0) {
213 BreakpointInfo* bp = me->method_holder()->breakpoints();
214 for (; bp != nullptr; bp = bp->next()) {
215 if (bp->match(me)) {
216 code_at_put(bp->bci(), bp->orig_bytecode());
217 }
218 }
219 }
220 #endif
221
222 // And load the exception table.
223 ExceptionTable exc_table(me);
224
225 // Allocate one extra spot in our list of exceptions. This
226 // last entry will be used to represent the possibility that
227 // an exception escapes the method. See ciExceptionHandlerStream
228 // for details.
229 _exception_handlers =
230 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
231 * (_handler_count + 1));
232 if (_handler_count > 0) {
233 for (int i=0; i<_handler_count; i++) {
234 _exception_handlers[i] = new (arena) ciExceptionHandler(
235 holder(),
236 /* start */ exc_table.start_pc(i),
237 /* limit */ exc_table.end_pc(i),
238 /* goto pc */ exc_table.handler_pc(i),
239 /* cp index */ exc_table.catch_type_index(i));
240 }
241 }
242
243 // Put an entry at the end of our list to represent the possibility
244 // of exceptional exit.
245 _exception_handlers[_handler_count] =
246 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
247
248 if (CIPrintMethodCodes) {
249 print_codes();
250 }
251 }
252
253
254 // ------------------------------------------------------------------
255 // ciMethod::has_linenumber_table
256 //
257 // length unknown until decompression
258 bool ciMethod::has_linenumber_table() const {
259 check_is_loaded();
260 VM_ENTRY_MARK;
261 return get_Method()->has_linenumber_table();
262 }
263
264
265 // ------------------------------------------------------------------
266 // ciMethod::line_number_from_bci
267 int ciMethod::line_number_from_bci(int bci) const {
268 check_is_loaded();
269 VM_ENTRY_MARK;
270 return get_Method()->line_number_from_bci(bci);
271 }
272
273
274 // ------------------------------------------------------------------
275 // ciMethod::vtable_index
276 //
277 // Get the position of this method's entry in the vtable, if any.
278 int ciMethod::vtable_index() {
279 check_is_loaded();
280 assert(holder()->is_linked(), "must be linked");
281 VM_ENTRY_MARK;
282 return get_Method()->vtable_index();
283 }
284
285 // ------------------------------------------------------------------
286 // ciMethod::uses_balanced_monitors
287 //
288 // Does this method use monitors in a strict stack-disciplined manner?
289 bool ciMethod::has_balanced_monitors() {
290 check_is_loaded();
291 if (_balanced_monitors) return true;
292
293 // Analyze the method to see if monitors are used properly.
294 VM_ENTRY_MARK;
295 methodHandle method(THREAD, get_Method());
296 assert(method->has_monitor_bytecodes(), "should have checked this");
297
298 // Check to see if a previous compilation computed the
299 // monitor-matching analysis.
300 if (method->guaranteed_monitor_matching()) {
301 _balanced_monitors = true;
302 return true;
303 }
304
305 {
306 ExceptionMark em(THREAD);
307 ResourceMark rm(THREAD);
308 GeneratePairingInfo gpi(method);
309 if (!gpi.compute_map(THREAD)) {
310 fatal("Unrecoverable verification or out-of-memory error");
311 }
312 if (!gpi.monitor_safe()) {
313 return false;
314 }
315 method->set_guaranteed_monitor_matching();
316 _balanced_monitors = true;
317 }
318 return true;
319 }
320
321
322 // ------------------------------------------------------------------
323 // ciMethod::get_flow_analysis
324 ciTypeFlow* ciMethod::get_flow_analysis() {
325 #if defined(COMPILER2)
326 if (_flow == nullptr) {
327 ciEnv* env = CURRENT_ENV;
328 _flow = new (env->arena()) ciTypeFlow(env, this);
329 _flow->do_flow();
330 }
331 return _flow;
332 #else // COMPILER2
333 ShouldNotReachHere();
334 return nullptr;
335 #endif // COMPILER2
336 }
337
338
339 // ------------------------------------------------------------------
340 // ciMethod::get_osr_flow_analysis
341 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
342 #if defined(COMPILER2)
343 // OSR entry points are always place after a call bytecode of some sort
344 assert(osr_bci >= 0, "must supply valid OSR entry point");
345 ciEnv* env = CURRENT_ENV;
346 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
347 flow->do_flow();
348 return flow;
349 #else // COMPILER2
350 ShouldNotReachHere();
351 return nullptr;
352 #endif // COMPILER2
353 }
354
355 // ------------------------------------------------------------------
356 // ciMethod::raw_liveness_at_bci
357 //
358 // Which local variables are live at a specific bci?
359 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
360 check_is_loaded();
361 if (_liveness == nullptr) {
362 // Create the liveness analyzer.
363 Arena* arena = CURRENT_ENV->arena();
364 _liveness = new (arena) MethodLiveness(arena, this);
365 _liveness->compute_liveness();
366 }
367 return _liveness->get_liveness_at(bci);
368 }
369
370 // ------------------------------------------------------------------
371 // ciMethod::liveness_at_bci
372 //
373 // Which local variables are live at a specific bci? When debugging
374 // will return true for all locals in some cases to improve debug
375 // information.
376 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
377 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
378 // Keep all locals live for the user's edification and amusement.
379 MethodLivenessResult result(_max_locals);
380 result.set_range(0, _max_locals);
381 result.set_is_valid();
382 return result;
383 }
384 return raw_liveness_at_bci(bci);
385 }
386
387 // ciMethod::live_local_oops_at_bci
388 //
389 // find all the live oops in the locals array for a particular bci
390 // Compute what the interpreter believes by using the interpreter
391 // oopmap generator. This is used as a double check during osr to
392 // guard against conservative result from MethodLiveness making us
393 // think a dead oop is live. MethodLiveness is conservative in the
394 // sense that it may consider locals to be live which cannot be live,
395 // like in the case where a local could contain an oop or a primitive
396 // along different paths. In that case the local must be dead when
397 // those paths merge. Since the interpreter's viewpoint is used when
398 // gc'ing an interpreter frame we need to use its viewpoint during
399 // OSR when loading the locals.
400
401 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
402 VM_ENTRY_MARK;
403 InterpreterOopMap mask;
404 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
405 int mask_size = max_locals();
406 ResourceBitMap result(mask_size);
407 int i;
408 for (i = 0; i < mask_size ; i++ ) {
409 if (mask.is_oop(i)) result.set_bit(i);
410 }
411 return result;
412 }
413
414
415 #ifdef COMPILER1
416 // ------------------------------------------------------------------
417 // ciMethod::bci_block_start
418 //
419 // Marks all bcis where a new basic block starts
420 const BitMap& ciMethod::bci_block_start() {
421 check_is_loaded();
422 if (_liveness == nullptr) {
423 // Create the liveness analyzer.
424 Arena* arena = CURRENT_ENV->arena();
425 _liveness = new (arena) MethodLiveness(arena, this);
426 _liveness->compute_liveness();
427 }
428
429 return _liveness->get_bci_block_start();
430 }
431 #endif // COMPILER1
432
433
434 // ------------------------------------------------------------------
435 // ciMethod::check_overflow
436 //
437 // Check whether the profile counter is overflowed and adjust if true.
438 // For invoke* it will turn negative values into max_jint,
439 // and for checkcast/aastore/instanceof turn positive values into min_jint.
440 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
441 switch (code) {
442 case Bytecodes::_aastore: // fall-through
443 case Bytecodes::_checkcast: // fall-through
444 case Bytecodes::_instanceof: {
445 if (VM_Version::profile_all_receivers_at_type_check()) {
446 return (c < 0 ? max_jint : c); // always non-negative
447 }
448 return (c > 0 ? min_jint : c); // always non-positive
449 }
450 default: {
451 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
452 return (c < 0 ? max_jint : c); // always non-negative
453 }
454 }
455 }
456
457
458 // ------------------------------------------------------------------
459 // ciMethod::call_profile_at_bci
460 //
461 // Get the ciCallProfile for the invocation of this method.
462 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
463 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
464 ResourceMark rm;
465 ciCallProfile result;
466 if (method_data() != nullptr && method_data()->is_mature()) {
467 ciProfileData* data = method_data()->bci_to_data(bci);
468 if (data != nullptr && data->is_CounterData()) {
469 // Every profiled call site has a counter.
470 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
471
472 if (!data->is_ReceiverTypeData()) {
473 result._receiver_count[0] = 0; // that's a definite zero
474 } else { // ReceiverTypeData is a subclass of CounterData
475 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
476 // In addition, virtual call sites have receiver type information
477 int receivers_count_total = 0;
478 int morphism = 0;
479 // Precompute morphism for the possible fixup
480 for (uint i = 0; i < call->row_limit(); i++) {
481 ciKlass* receiver = call->receiver(i);
482 if (receiver == nullptr) continue;
483 morphism++;
484 }
485 int epsilon = 0;
486 // For a call, it is assumed that either the type of the receiver(s)
487 // is recorded or an associated counter is incremented, but not both. With
488 // tiered compilation, however, both can happen due to the interpreter and
489 // C1 profiling invocations differently. Address that inconsistency here.
490 if (morphism == 1 && count > 0) {
491 epsilon = count;
492 count = 0;
493 }
494 for (uint i = 0; i < call->row_limit(); i++) {
495 ciKlass* receiver = call->receiver(i);
496 if (receiver == nullptr) continue;
497 int rcount = saturated_add(call->receiver_count(i), epsilon);
498 if (rcount == 0) rcount = 1; // Should be valid value
499 receivers_count_total = saturated_add(receivers_count_total, rcount);
500 // Add the receiver to result data.
501 result.add_receiver(receiver, rcount);
502 // If we extend profiling to record methods,
503 // we will set result._method also.
504 }
505 // Determine call site's morphism.
506 // The call site count is 0 with known morphism (only 1 or 2 receivers)
507 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
508 // The call site count is > 0 in the case of a polymorphic virtual call.
509 if (morphism > 0 && morphism == result._limit) {
510 // The morphism <= MorphismLimit.
511 if ((morphism < ciCallProfile::MorphismLimit) ||
512 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
513 #ifdef ASSERT
514 if (count > 0) {
515 this->print_short_name(tty);
516 tty->print_cr(" @ bci:%d", bci);
517 this->print_codes();
518 assert(false, "this call site should not be polymorphic");
519 }
520 #endif
521 result._morphism = morphism;
522 }
523 }
524 // Make the count consistent if this is a call profile. If count is
525 // zero or less, presume that this is a typecheck profile and
526 // do nothing. Otherwise, increase count to be the sum of all
527 // receiver's counts.
528 if (count >= 0) {
529 count = saturated_add(count, receivers_count_total);
530 }
531 }
532 result._count = count;
533 }
534 }
535 return result;
536 }
537
538 // ------------------------------------------------------------------
539 // Add new receiver and sort data by receiver's profile count.
540 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
541 // Add new receiver and sort data by receiver's counts when we have space
542 // for it otherwise replace the less called receiver (less called receiver
543 // is placed to the last array element which is not used).
544 // First array's element contains most called receiver.
545 int i = _limit;
546 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
547 _receiver[i] = _receiver[i-1];
548 _receiver_count[i] = _receiver_count[i-1];
549 }
550 _receiver[i] = receiver;
551 _receiver_count[i] = receiver_count;
552 if (_limit < MorphismLimit) _limit++;
553 }
554
555
556 void ciMethod::assert_virtual_call_type_ok(int bci) {
557 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
558 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
559 }
560
561 void ciMethod::assert_call_type_ok(int bci) {
562 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
563 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
564 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
565 }
566
567 /**
568 * Check whether profiling provides a type for the argument i to the
569 * call at bci bci
570 *
571 * @param [in]bci bci of the call
572 * @param [in]i argument number
573 * @param [out]type profiled type of argument, null if none
574 * @param [out]ptr_kind whether always null, never null or maybe null
575 * @return true if profiling exists
576 *
577 */
578 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
579 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
580 ciProfileData* data = method_data()->bci_to_data(bci);
581 if (data != nullptr) {
582 if (data->is_VirtualCallTypeData()) {
583 assert_virtual_call_type_ok(bci);
584 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
585 if (i >= call->number_of_arguments()) {
586 return false;
587 }
588 type = call->valid_argument_type(i);
589 ptr_kind = call->argument_ptr_kind(i);
590 return true;
591 } else if (data->is_CallTypeData()) {
592 assert_call_type_ok(bci);
593 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
594 if (i >= call->number_of_arguments()) {
595 return false;
596 }
597 type = call->valid_argument_type(i);
598 ptr_kind = call->argument_ptr_kind(i);
599 return true;
600 }
601 }
602 }
603 return false;
604 }
605
606 /**
607 * Check whether profiling provides a type for the return value from
608 * the call at bci bci
609 *
610 * @param [in]bci bci of the call
611 * @param [out]type profiled type of argument, null if none
612 * @param [out]ptr_kind whether always null, never null or maybe null
613 * @return true if profiling exists
614 *
615 */
616 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
617 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) {
618 ciProfileData* data = method_data()->bci_to_data(bci);
619 if (data != nullptr) {
620 if (data->is_VirtualCallTypeData()) {
621 assert_virtual_call_type_ok(bci);
622 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
623 if (call->has_return()) {
624 type = call->valid_return_type();
625 ptr_kind = call->return_ptr_kind();
626 return true;
627 }
628 } else if (data->is_CallTypeData()) {
629 assert_call_type_ok(bci);
630 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
631 if (call->has_return()) {
632 type = call->valid_return_type();
633 ptr_kind = call->return_ptr_kind();
634 }
635 return true;
636 }
637 }
638 }
639 return false;
640 }
641
642 /**
643 * Check whether profiling provides a type for the parameter i
644 *
645 * @param [in]i parameter number
646 * @param [out]type profiled type of parameter, null if none
647 * @param [out]ptr_kind whether always null, never null or maybe null
648 * @return true if profiling exists
649 *
650 */
651 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
652 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
653 ciParametersTypeData* parameters = method_data()->parameters_type_data();
654 if (parameters != nullptr && i < parameters->number_of_parameters()) {
655 type = parameters->valid_parameter_type(i);
656 ptr_kind = parameters->parameter_ptr_kind(i);
657 return true;
658 }
659 }
660 return false;
661 }
662
663
664 // ------------------------------------------------------------------
665 // ciMethod::find_monomorphic_target
666 //
667 // Given a certain calling environment, find the monomorphic target
668 // for the call. Return null if the call is not monomorphic in
669 // its calling environment, or if there are only abstract methods.
670 // The returned method is never abstract.
671 // Note: If caller uses a non-null result, it must inform dependencies
672 // via assert_unique_concrete_method or assert_leaf_type.
673 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
674 ciInstanceKlass* callee_holder,
675 ciInstanceKlass* actual_recv,
676 bool check_access) {
677 check_is_loaded();
678
679 if (actual_recv->is_interface()) {
680 // %%% We cannot trust interface types, yet. See bug 6312651.
681 return nullptr;
682 }
683
684 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
685 if (root_m == nullptr) {
686 // Something went wrong looking up the actual receiver method.
687 return nullptr;
688 }
689
690 // Make certain quick checks even if UseCHA is false.
691
692 // Is it private or final?
693 if (root_m->can_be_statically_bound()) {
694 assert(!root_m->is_abstract(), "sanity");
695 return root_m;
696 }
697
698 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
699 // Easy case. There is no other place to put a method, so don't bother
700 // to go through the VM_ENTRY_MARK and all the rest.
701 if (root_m->is_abstract()) {
702 return nullptr;
703 }
704 return root_m;
705 }
706
707 // Array methods (clone, hashCode, etc.) are always statically bound.
708 // If we were to see an array type here, we'd return root_m.
709 // However, this method processes only ciInstanceKlasses. (See 4962591.)
710 // The inline_native_clone intrinsic narrows Object to T[] properly,
711 // so there is no need to do the same job here.
712
713 if (!UseCHA) return nullptr;
714
715 VM_ENTRY_MARK;
716
717 methodHandle target;
718 {
719 MutexLocker locker(Compile_lock);
720 InstanceKlass* context = actual_recv->get_instanceKlass();
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 assert(target() == nullptr || !target()->is_abstract(), "not allowed");
726 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
727 }
728
729 #ifndef PRODUCT
730 LogTarget(Debug, dependencies) lt;
731 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) {
732 LogStream ls(<);
733 ls.print("found a non-root unique target method");
734 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name());
735 ls.print(" method = ");
736 target->print_short_name(&ls);
737 ls.cr();
738 }
739 #endif //PRODUCT
740
741 if (target() == nullptr) {
742 return nullptr;
743 }
744
745 // Redefinition support.
746 if (this->is_old() || root_m->is_old() || target->is_old()) {
747 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
748 return nullptr;
749 }
750
751 if (target() == root_m->get_Method()) {
752 return root_m;
753 }
754 if (!root_m->is_public() &&
755 !root_m->is_protected()) {
756 // If we are going to reason about inheritance, it's easiest
757 // if the method in question is public, protected, or private.
758 // If the answer is not root_m, it is conservatively correct
759 // to return null, even if the CHA encountered irrelevant
760 // methods in other packages.
761 // %%% TO DO: Work out logic for package-private methods
762 // with the same name but different vtable indexes.
763 return nullptr;
764 }
765 return CURRENT_THREAD_ENV->get_method(target());
766 }
767
768 // ------------------------------------------------------------------
769 // ciMethod::can_be_statically_bound
770 //
771 // Tries to determine whether a method can be statically bound in some context.
772 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
773 return (holder() == context) && can_be_statically_bound();
774 }
775
776 // ------------------------------------------------------------------
777 // ciMethod::can_omit_stack_trace
778 //
779 // Tries to determine whether a method can omit stack trace in throw in compiled code.
780 bool ciMethod::can_omit_stack_trace() const {
781 if (!StackTraceInThrowable) {
782 return true; // stack trace is switched off.
783 }
784 if (!OmitStackTraceInFastThrow) {
785 return false; // Have to provide stack trace.
786 }
787 return _can_omit_stack_trace;
788 }
789
790 // ------------------------------------------------------------------
791 // ciMethod::resolve_invoke
792 //
793 // Given a known receiver klass, find the target for the call.
794 // Return null if the call has no target or the target is abstract.
795 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
796 check_is_loaded();
797 VM_ENTRY_MARK;
798
799 Klass* caller_klass = caller->get_Klass();
800 Klass* recv = exact_receiver->get_Klass();
801 Klass* resolved = holder()->get_Klass();
802 Symbol* h_name = name()->get_symbol();
803 Symbol* h_signature = signature()->get_symbol();
804
805 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
806 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
807 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
808 Method* m = nullptr;
809 // Only do exact lookup if receiver klass has been linked. Otherwise,
810 // the vtable has not been setup, and the LinkResolver will fail.
811 if (recv->is_array_klass()
812 ||
813 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
814 if (holder()->is_interface()) {
815 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
816 } else {
817 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
818 }
819 }
820
821 if (m == nullptr) {
822 // Return null only if there was a problem with lookup (uninitialized class, etc.)
823 return nullptr;
824 }
825
826 ciMethod* result = this;
827 if (m != get_Method()) {
828 // Redefinition support.
829 if (this->is_old() || m->is_old()) {
830 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
831 return nullptr;
832 }
833
834 result = CURRENT_THREAD_ENV->get_method(m);
835 }
836
837 if (result->is_abstract() && !allow_abstract) {
838 // Don't return abstract methods because they aren't optimizable or interesting.
839 return nullptr;
840 }
841 return result;
842 }
843
844 // ------------------------------------------------------------------
845 // ciMethod::resolve_vtable_index
846 //
847 // Given a known receiver klass, find the vtable index for the call.
848 // Return Method::invalid_vtable_index if the vtable_index is unknown.
849 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
850 check_is_loaded();
851
852 int vtable_index = Method::invalid_vtable_index;
853 // Only do lookup if receiver klass has been linked. Otherwise,
854 // the vtable has not been setup, and the LinkResolver will fail.
855 if (!receiver->is_interface()
856 && (!receiver->is_instance_klass() ||
857 receiver->as_instance_klass()->is_linked())) {
858 VM_ENTRY_MARK;
859
860 Klass* caller_klass = caller->get_Klass();
861 Klass* recv = receiver->get_Klass();
862 Symbol* h_name = name()->get_symbol();
863 Symbol* h_signature = signature()->get_symbol();
864
865 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
866 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
867 if (vtable_index == Method::nonvirtual_vtable_index) {
868 // A statically bound method. Return "no such index".
869 vtable_index = Method::invalid_vtable_index;
870 }
871 }
872
873 return vtable_index;
874 }
875
876 // ------------------------------------------------------------------
877 // ciMethod::get_field_at_bci
878 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
879 ciBytecodeStream iter(this);
880 iter.reset_to_bci(bci);
881 iter.next();
882 return iter.get_field(will_link);
883 }
884
885 // ------------------------------------------------------------------
886 // ciMethod::get_method_at_bci
887 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
888 ciBytecodeStream iter(this);
889 iter.reset_to_bci(bci);
890 iter.next();
891 return iter.get_method(will_link, declared_signature);
892 }
893
894 // ------------------------------------------------------------------
895 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
896 ciBytecodeStream iter(this);
897 iter.reset_to_bci(bci);
898 iter.next();
899 return iter.get_declared_method_holder();
900 }
901
902 // ------------------------------------------------------------------
903 // Adjust a CounterData count to be commensurate with
904 // interpreter_invocation_count. If the MDO exists for
905 // only 25% of the time the method exists, then the
906 // counts in the MDO should be scaled by 4X, so that
907 // they can be usefully and stably compared against the
908 // invocation counts in methods.
909 int ciMethod::scale_count(int count, float prof_factor) {
910 if (count > 0 && method_data() != nullptr) {
911 int counter_life = method_data()->invocation_count();
912 int method_life = interpreter_invocation_count();
913 if (method_life < counter_life) { // may happen because of the snapshot timing
914 method_life = counter_life;
915 }
916 if (counter_life > 0) {
917 double count_d = (double)count * prof_factor * method_life / counter_life + 0.5;
918 if (count_d >= static_cast<double>(INT_MAX)) {
919 // Clamp in case of overflowing int range.
920 count = INT_MAX;
921 } else {
922 count = int(count_d);
923 count = (count > 0) ? count : 1;
924 }
925 } else {
926 count = 1;
927 }
928 }
929 return count;
930 }
931
932
933 // ------------------------------------------------------------------
934 // ciMethod::is_special_get_caller_class_method
935 //
936 bool ciMethod::is_ignored_by_security_stack_walk() const {
937 check_is_loaded();
938 VM_ENTRY_MARK;
939 return get_Method()->is_ignored_by_security_stack_walk();
940 }
941
942 // ------------------------------------------------------------------
943 // ciMethod::needs_clinit_barrier
944 //
945 bool ciMethod::needs_clinit_barrier() const {
946 check_is_loaded();
947 return is_static() && !holder()->is_initialized();
948 }
949
950 // ------------------------------------------------------------------
951 // invokedynamic support
952
953 // ------------------------------------------------------------------
954 // ciMethod::is_method_handle_intrinsic
955 //
956 // Return true if the method is an instance of the JVM-generated
957 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
958 bool ciMethod::is_method_handle_intrinsic() const {
959 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
960 return (MethodHandles::is_signature_polymorphic(iid) &&
961 MethodHandles::is_signature_polymorphic_intrinsic(iid));
962 }
963
964 // ------------------------------------------------------------------
965 // ciMethod::is_compiled_lambda_form
966 //
967 // Return true if the method is a generated MethodHandle adapter.
968 // These are built by Java code.
969 bool ciMethod::is_compiled_lambda_form() const {
970 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
971 return iid == vmIntrinsics::_compiledLambdaForm;
972 }
973
974 // ------------------------------------------------------------------
975 // ciMethod::is_object_initializer
976 //
977 bool ciMethod::is_object_initializer() const {
978 return name() == ciSymbols::object_initializer_name();
979 }
980
981 // ------------------------------------------------------------------
982 // ciMethod::is_scoped
983 //
984 // Return true for methods annotated with @Scoped
985 bool ciMethod::is_scoped() const {
986 return get_Method()->is_scoped();
987 }
988
989 // ------------------------------------------------------------------
990 // ciMethod::has_member_arg
991 //
992 // Return true if the method is a linker intrinsic like _linkToVirtual.
993 // These are built by the JVM.
994 bool ciMethod::has_member_arg() const {
995 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
996 return (MethodHandles::is_signature_polymorphic(iid) &&
997 MethodHandles::has_member_arg(iid));
998 }
999
1000 // ------------------------------------------------------------------
1001 // ciMethod::ensure_method_data
1002 //
1003 // Generate new MethodData* objects at compile time.
1004 // Return true if allocation was successful or no MDO is required.
1005 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1006 EXCEPTION_CONTEXT;
1007 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1008 return true;
1009 }
1010 if (h_m()->method_data() == nullptr) {
1011 Method::build_profiling_method_data(h_m, THREAD);
1012 if (HAS_PENDING_EXCEPTION) {
1013 CLEAR_PENDING_EXCEPTION;
1014 }
1015 }
1016 if (h_m()->method_data() != nullptr) {
1017 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1018 return _method_data->load_data();
1019 } else {
1020 _method_data = CURRENT_ENV->get_empty_methodData();
1021 return false;
1022 }
1023 }
1024
1025 // public, retroactive version
1026 bool ciMethod::ensure_method_data() {
1027 bool result = true;
1028 if (_method_data == nullptr || _method_data->is_empty()) {
1029 GUARDED_VM_ENTRY({
1030 methodHandle mh(Thread::current(), get_Method());
1031 result = ensure_method_data(mh);
1032 });
1033 }
1034 return result;
1035 }
1036
1037
1038 // ------------------------------------------------------------------
1039 // ciMethod::method_data
1040 //
1041 ciMethodData* ciMethod::method_data() {
1042 if (_method_data != nullptr) {
1043 return _method_data;
1044 }
1045 VM_ENTRY_MARK;
1046 ciEnv* env = CURRENT_ENV;
1047 Thread* my_thread = JavaThread::current();
1048 methodHandle h_m(my_thread, get_Method());
1049
1050 if (h_m()->method_data() != nullptr) {
1051 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1052 _method_data->load_data();
1053 } else {
1054 _method_data = CURRENT_ENV->get_empty_methodData();
1055 }
1056 return _method_data;
1057
1058 }
1059
1060 // ------------------------------------------------------------------
1061 // ciMethod::method_data_or_null
1062 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1063 // null otherwise.
1064 ciMethodData* ciMethod::method_data_or_null() {
1065 ciMethodData *md = method_data();
1066 if (md->is_empty()) {
1067 return nullptr;
1068 }
1069 return md;
1070 }
1071
1072 // ------------------------------------------------------------------
1073 // ciMethod::ensure_method_counters
1074 //
1075 MethodCounters* ciMethod::ensure_method_counters() {
1076 check_is_loaded();
1077 VM_ENTRY_MARK;
1078 methodHandle mh(THREAD, get_Method());
1079 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1080 return method_counters;
1081 }
1082
1083 // ------------------------------------------------------------------
1084 // ciMethod::has_option
1085 //
1086 bool ciMethod::has_option(CompileCommandEnum option) {
1087 check_is_loaded();
1088 VM_ENTRY_MARK;
1089 methodHandle mh(THREAD, get_Method());
1090 return CompilerOracle::has_option(mh, option);
1091 }
1092
1093 // ------------------------------------------------------------------
1094 // ciMethod::has_option_value
1095 //
1096 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1097 check_is_loaded();
1098 VM_ENTRY_MARK;
1099 methodHandle mh(THREAD, get_Method());
1100 return CompilerOracle::has_option_value(mh, option, value);
1101 }
1102 // ------------------------------------------------------------------
1103 // ciMethod::can_be_compiled
1104 //
1105 // Have previous compilations of this method succeeded?
1106 bool ciMethod::can_be_compiled() {
1107 check_is_loaded();
1108 ciEnv* env = CURRENT_ENV;
1109 if (is_c1_compile(env->comp_level())) {
1110 return _is_c1_compilable;
1111 }
1112 return _is_c2_compilable;
1113 }
1114
1115 // ------------------------------------------------------------------
1116 // ciMethod::has_compiled_code
1117 bool ciMethod::has_compiled_code() {
1118 return inline_instructions_size() > 0;
1119 }
1120
1121 int ciMethod::highest_osr_comp_level() {
1122 check_is_loaded();
1123 VM_ENTRY_MARK;
1124 return get_Method()->highest_osr_comp_level();
1125 }
1126
1127 // ------------------------------------------------------------------
1128 // ciMethod::code_size_for_inlining
1129 //
1130 // Code size for inlining decisions. This method returns a code
1131 // size of 1 for methods which has the ForceInline annotation.
1132 int ciMethod::code_size_for_inlining() {
1133 check_is_loaded();
1134 if (get_Method()->force_inline()) {
1135 return 1;
1136 }
1137 return code_size();
1138 }
1139
1140 // ------------------------------------------------------------------
1141 // ciMethod::inline_instructions_size
1142 //
1143 // This is a rough metric for "fat" methods, compared before inlining
1144 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1145 // junk like exception handler, stubs, and constant table, which are
1146 // not highly relevant to an inlined method. So we use the more
1147 // specific accessor nmethod::insts_size.
1148 // Also some instructions inside the code are excluded from inline
1149 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter)
1150 int ciMethod::inline_instructions_size() {
1151 if (_inline_instructions_size == -1) {
1152 GUARDED_VM_ENTRY(
1153 nmethod* code = get_Method()->code();
1154 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1155 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size();
1156 _inline_instructions_size = isize > 0 ? isize : 0;
1157 } else {
1158 _inline_instructions_size = 0;
1159 }
1160 );
1161 }
1162 return _inline_instructions_size;
1163 }
1164
1165 // ------------------------------------------------------------------
1166 // ciMethod::log_nmethod_identity
1167 void ciMethod::log_nmethod_identity(xmlStream* log) {
1168 GUARDED_VM_ENTRY(
1169 nmethod* code = get_Method()->code();
1170 if (code != nullptr) {
1171 code->log_identity(log);
1172 }
1173 )
1174 }
1175
1176 // ------------------------------------------------------------------
1177 // ciMethod::is_not_reached
1178 bool ciMethod::is_not_reached(int bci) {
1179 check_is_loaded();
1180 VM_ENTRY_MARK;
1181 return Interpreter::is_not_reached(
1182 methodHandle(THREAD, get_Method()), bci);
1183 }
1184
1185 // ------------------------------------------------------------------
1186 // ciMethod::was_never_executed
1187 bool ciMethod::was_executed_more_than(int times) {
1188 VM_ENTRY_MARK;
1189 return get_Method()->was_executed_more_than(times);
1190 }
1191
1192 // ------------------------------------------------------------------
1193 // ciMethod::has_unloaded_classes_in_signature
1194 bool ciMethod::has_unloaded_classes_in_signature() {
1195 // ciSignature is resolved against some accessing class and
1196 // signature classes aren't required to be local. As a benefit,
1197 // it makes signature classes visible through loader constraints.
1198 // So, encountering an unloaded class signals it is absent both in
1199 // the callee (local) and caller contexts.
1200 return signature()->has_unloaded_classes();
1201 }
1202
1203 // ------------------------------------------------------------------
1204 // ciMethod::is_klass_loaded
1205 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1206 VM_ENTRY_MARK;
1207 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
1208 }
1209
1210 // ------------------------------------------------------------------
1211 // ciMethod::check_call
1212 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1213 // This method is used only in C2 from InlineTree::ok_to_inline,
1214 // and is only used under -Xcomp.
1215 // It appears to fail when applied to an invokeinterface call site.
1216 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1217 VM_ENTRY_MARK;
1218 {
1219 ExceptionMark em(THREAD);
1220 HandleMark hm(THREAD);
1221 constantPoolHandle pool (THREAD, get_Method()->constants());
1222 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1223 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1224 if (HAS_PENDING_EXCEPTION) {
1225 CLEAR_PENDING_EXCEPTION;
1226 return false;
1227 } else {
1228 return (spec_method->is_static() == is_static);
1229 }
1230 }
1231 return false;
1232 }
1233 // ------------------------------------------------------------------
1234 // ciMethod::print_codes
1235 //
1236 // Print the bytecodes for this method.
1237 void ciMethod::print_codes_on(outputStream* st) {
1238 check_is_loaded();
1239 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1240 }
1241
1242
1243 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1244 check_is_loaded(); \
1245 VM_ENTRY_MARK; \
1246 return get_Method()->flag_accessor(); \
1247 }
1248
1249 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1250 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1251 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1252 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1253 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1254 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1255
1256 bool ciMethod::is_boxing_method() const {
1257 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1258 switch (intrinsic_id()) {
1259 case vmIntrinsics::_Boolean_valueOf:
1260 case vmIntrinsics::_Byte_valueOf:
1261 case vmIntrinsics::_Character_valueOf:
1262 case vmIntrinsics::_Short_valueOf:
1263 case vmIntrinsics::_Integer_valueOf:
1264 case vmIntrinsics::_Long_valueOf:
1265 case vmIntrinsics::_Float_valueOf:
1266 case vmIntrinsics::_Double_valueOf:
1267 return true;
1268 default:
1269 return false;
1270 }
1271 }
1272 return false;
1273 }
1274
1275 bool ciMethod::is_unboxing_method() const {
1276 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1277 switch (intrinsic_id()) {
1278 case vmIntrinsics::_booleanValue:
1279 case vmIntrinsics::_byteValue:
1280 case vmIntrinsics::_charValue:
1281 case vmIntrinsics::_shortValue:
1282 case vmIntrinsics::_intValue:
1283 case vmIntrinsics::_longValue:
1284 case vmIntrinsics::_floatValue:
1285 case vmIntrinsics::_doubleValue:
1286 return true;
1287 default:
1288 return false;
1289 }
1290 }
1291 return false;
1292 }
1293
1294 bool ciMethod::is_vector_method() const {
1295 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1296 (intrinsic_id() != vmIntrinsics::_none);
1297 }
1298
1299 BCEscapeAnalyzer *ciMethod::get_bcea() {
1300 #ifdef COMPILER2
1301 if (_bcea == nullptr) {
1302 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr);
1303 }
1304 return _bcea;
1305 #else // COMPILER2
1306 ShouldNotReachHere();
1307 return nullptr;
1308 #endif // COMPILER2
1309 }
1310
1311 ciMethodBlocks *ciMethod::get_method_blocks() {
1312 if (_method_blocks == nullptr) {
1313 Arena *arena = CURRENT_ENV->arena();
1314 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1315 }
1316 return _method_blocks;
1317 }
1318
1319 #undef FETCH_FLAG_FROM_VM
1320
1321 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1322 st->print("%s %s %s",
1323 CURRENT_ENV->replay_name(method->method_holder()),
1324 method->name()->as_quoted_ascii(),
1325 method->signature()->as_quoted_ascii());
1326 }
1327
1328 void ciMethod::dump_name_as_ascii(outputStream* st) {
1329 Method* method = get_Method();
1330 dump_name_as_ascii(st, method);
1331 }
1332
1333 void ciMethod::dump_replay_data(outputStream* st) {
1334 ResourceMark rm;
1335 Method* method = get_Method();
1336 if (MethodHandles::is_signature_polymorphic_method(method)) {
1337 // ignore for now
1338 return;
1339 }
1340 MethodCounters* mcs = method->method_counters();
1341 st->print("ciMethod ");
1342 dump_name_as_ascii(st);
1343 st->print_cr(" %d %d %d %d %d",
1344 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(),
1345 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(),
1346 interpreter_invocation_count(),
1347 interpreter_throwout_count(),
1348 _inline_instructions_size);
1349 }
1350
1351 // ------------------------------------------------------------------
1352 // ciMethod::print_codes
1353 //
1354 // Print a range of the bytecodes for this method.
1355 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1356 check_is_loaded();
1357 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1358 }
1359
1360 // ------------------------------------------------------------------
1361 // ciMethod::print_name
1362 //
1363 // Print the name of this method, including signature and some flags.
1364 void ciMethod::print_name(outputStream* st) {
1365 check_is_loaded();
1366 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1367 }
1368
1369 // ------------------------------------------------------------------
1370 // ciMethod::print_short_name
1371 //
1372 // Print the name of this method, without signature.
1373 void ciMethod::print_short_name(outputStream* st) {
1374 if (is_loaded()) {
1375 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1376 } else {
1377 // Fall back if method is not loaded.
1378 holder()->print_name_on(st);
1379 st->print("::");
1380 name()->print_symbol_on(st);
1381 if (WizardMode)
1382 signature()->as_symbol()->print_symbol_on(st);
1383 }
1384 }
1385
1386 // ------------------------------------------------------------------
1387 // ciMethod::print_impl
1388 //
1389 // Implementation of the print method.
1390 void ciMethod::print_impl(outputStream* st) {
1391 ciMetadata::print_impl(st);
1392 st->print(" name=");
1393 name()->print_symbol_on(st);
1394 st->print(" holder=");
1395 holder()->print_name_on(st);
1396 st->print(" signature=");
1397 signature()->as_symbol()->print_symbol_on(st);
1398 if (is_loaded()) {
1399 st->print(" loaded=true");
1400 st->print(" arg_size=%d", arg_size());
1401 st->print(" flags=");
1402 flags().print_member_flags(st);
1403 } else {
1404 st->print(" loaded=false");
1405 }
1406 }
1407
1408 // ------------------------------------------------------------------
1409
1410 static BasicType erase_to_word_type(BasicType bt) {
1411 if (is_subword_type(bt)) return T_INT;
1412 if (is_reference_type(bt)) return T_OBJECT;
1413 return bt;
1414 }
1415
1416 static bool basic_types_match(ciType* t1, ciType* t2) {
1417 if (t1 == t2) return true;
1418 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1419 }
1420
1421 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1422 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1423 !resolved_method->is_method_handle_intrinsic();
1424
1425 if (!invoke_through_mh_intrinsic) {
1426 // Method name & descriptor should stay the same.
1427 // Signatures may reference unloaded types and thus they may be not strictly equal.
1428 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1429 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1430
1431 return (declared_method->name()->equals(resolved_method->name())) &&
1432 (declared_signature->equals(resolved_signature));
1433 }
1434
1435 ciMethod* linker = declared_method;
1436 ciMethod* target = resolved_method;
1437 // Linkers have appendix argument which is not passed to callee.
1438 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1439 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1440 return false; // argument slot count mismatch
1441 }
1442
1443 ciSignature* linker_sig = linker->signature();
1444 ciSignature* target_sig = target->signature();
1445
1446 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1447 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1448 return false; // argument count mismatch
1449 }
1450
1451 int sbase = 0, rbase = 0;
1452 switch (linker->intrinsic_id()) {
1453 case vmIntrinsics::_linkToVirtual:
1454 case vmIntrinsics::_linkToInterface:
1455 case vmIntrinsics::_linkToSpecial: {
1456 if (target->is_static()) {
1457 return false;
1458 }
1459 if (linker_sig->type_at(0)->is_primitive_type()) {
1460 return false; // receiver should be an oop
1461 }
1462 sbase = 1; // skip receiver
1463 break;
1464 }
1465 case vmIntrinsics::_linkToStatic: {
1466 if (!target->is_static()) {
1467 return false;
1468 }
1469 break;
1470 }
1471 case vmIntrinsics::_invokeBasic: {
1472 if (target->is_static()) {
1473 if (target_sig->type_at(0)->is_primitive_type()) {
1474 return false; // receiver should be an oop
1475 }
1476 rbase = 1; // skip receiver
1477 }
1478 break;
1479 }
1480 default:
1481 break;
1482 }
1483 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1484 int arg_count = target_sig->count() - rbase;
1485 for (int i = 0; i < arg_count; i++) {
1486 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1487 return false;
1488 }
1489 }
1490 // Only check the return type if the symbolic info has non-void return type.
1491 // I.e. the return value of the resolved method can be dropped.
1492 if (!linker->return_type()->is_void() &&
1493 !basic_types_match(linker->return_type(), target->return_type())) {
1494 return false;
1495 }
1496 return true; // no mismatch found
1497 }
1498
1499 // ------------------------------------------------------------------
1500 // ciMethod::is_old
1501 //
1502 // Return true for redefined methods
1503 bool ciMethod::is_old() const {
1504 ASSERT_IN_VM;
1505 return get_Method()->is_old();
1506 }