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/compileTask.hpp"
40 #include "compiler/methodLiveness.hpp"
41 #include "interpreter/interpreter.hpp"
42 #include "interpreter/linkResolver.hpp"
43 #include "interpreter/oopMapCache.hpp"
44 #include "logging/log.hpp"
45 #include "logging/logStream.hpp"
46 #include "memory/allocation.inline.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "oops/generateOopMap.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/trainingData.hpp"
52 #include "prims/methodHandles.hpp"
53 #include "runtime/deoptimization.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/sharedRuntime.hpp"
56 #include "utilities/bitMap.inline.hpp"
57 #include "utilities/xmlstream.hpp"
58 #ifdef COMPILER2
59 #include "ci/bcEscapeAnalyzer.hpp"
60 #include "ci/ciTypeFlow.hpp"
61 #include "oops/method.hpp"
62 #endif
63
64 // ciMethod
65 //
66 // This class represents a Method* in the HotSpot virtual
67 // machine.
68
69
70 // ------------------------------------------------------------------
71 // ciMethod::ciMethod
72 //
73 // Loaded method.
74 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
75 ciMetadata(h_m()),
76 _holder(holder)
77 {
78 assert(h_m() != nullptr, "no null method");
79 assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
80
81 // These fields are always filled in in loaded methods.
82 _flags = ciFlags(h_m->access_flags());
83
84 // Easy to compute, so fill them in now.
85 _max_stack = h_m->max_stack();
86 _max_locals = h_m->max_locals();
87 _code_size = h_m->code_size();
88 _handler_count = h_m->exception_table_length();
89 _size_of_parameters = h_m->size_of_parameters();
90 _uses_monitors = h_m->has_monitor_bytecodes();
91 _balanced_monitors = !_uses_monitors || h_m->guaranteed_monitor_matching();
92 _is_c1_compilable = !h_m->is_not_c1_compilable();
93 _is_c2_compilable = !h_m->is_not_c2_compilable();
94 _can_be_parsed = true;
95 _has_reserved_stack_access = h_m->has_reserved_stack_access();
96 _is_overpass = h_m->is_overpass();
97 // Lazy fields, filled in on demand. Require allocation.
98 _code = nullptr;
99 _exception_handlers = nullptr;
100 _liveness = nullptr;
101 _method_blocks = nullptr;
102 #if defined(COMPILER2)
103 _flow = nullptr;
104 _bcea = nullptr;
105 #endif // COMPILER2
106
107 // Check for blackhole intrinsic and then populate the intrinsic ID.
108 CompilerOracle::tag_blackhole_if_possible(h_m);
109 _intrinsic_id = h_m->intrinsic_id();
110
111 ciEnv *env = CURRENT_ENV;
112 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
113 // 6328518 check hotswap conditions under the right lock.
114 bool should_take_Compile_lock = !Compile_lock->owned_by_self();
115 ConditionalMutexLocker locker(Compile_lock, should_take_Compile_lock, Mutex::_safepoint_check_flag);
116 if (Dependencies::check_evol_method(h_m()) != nullptr) {
117 _is_c1_compilable = false;
118 _is_c2_compilable = false;
119 _can_be_parsed = false;
120 }
121 } else {
122 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
123 }
124
125 if (h_m->method_holder()->is_linked()) {
126 _can_be_statically_bound = h_m->can_be_statically_bound();
127 _can_omit_stack_trace = h_m->can_omit_stack_trace();
128 } else {
129 // Have to use a conservative value in this case.
130 _can_be_statically_bound = false;
131 _can_omit_stack_trace = true;
132 }
133
134 // Adjust the definition of this condition to be more useful:
135 // %%% take these conditions into account in vtable generation
136 if (!_can_be_statically_bound && h_m->is_private())
137 _can_be_statically_bound = true;
138 if (_can_be_statically_bound && h_m->is_abstract())
139 _can_be_statically_bound = false;
140
141 // generating _signature may allow GC and therefore move m.
142 // These fields are always filled in.
143 _name = env->get_symbol(h_m->name());
144 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
145 constantPoolHandle cpool(Thread::current(), h_m->constants());
146 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
147 _method_data = nullptr;
148 // Take a snapshot of these values, so they will be commensurate with the MDO.
149 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
150 int invcnt = h_m->interpreter_invocation_count();
151 // if the value overflowed report it as max int
152 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
153 _interpreter_throwout_count = h_m->interpreter_throwout_count();
154 } else {
155 _interpreter_invocation_count = 0;
156 _interpreter_throwout_count = 0;
157 }
158 if (_interpreter_invocation_count == 0)
159 _interpreter_invocation_count = 1;
160 _inline_instructions_size = -1;
161 if (ReplayCompiles) {
162 ciReplay::initialize(this);
163 }
164 }
165
166
167 // ------------------------------------------------------------------
168 // ciMethod::ciMethod
169 //
170 // Unloaded method.
171 ciMethod::ciMethod(ciInstanceKlass* holder,
172 ciSymbol* name,
173 ciSymbol* signature,
174 ciInstanceKlass* accessor) :
175 ciMetadata((Metadata*)nullptr),
176 _name( name),
177 _holder( holder),
178 _method_data( nullptr),
179 _method_blocks( nullptr),
180 _intrinsic_id( vmIntrinsics::_none),
181 _inline_instructions_size(-1),
182 _can_be_statically_bound(false),
183 _can_omit_stack_trace(true),
184 _liveness( nullptr)
185 #if defined(COMPILER2)
186 ,
187 _flow( nullptr),
188 _bcea( nullptr)
189 #endif // COMPILER2
190 {
191 // Usually holder and accessor are the same type but in some cases
192 // the holder has the wrong class loader (e.g. invokedynamic call
193 // sites) so we pass the accessor.
194 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
195 }
196
197
198 // ------------------------------------------------------------------
199 // ciMethod::load_code
200 //
201 // Load the bytecodes and exception handler table for this method.
202 void ciMethod::load_code() {
203 VM_ENTRY_MARK;
204 assert(is_loaded(), "only loaded methods have code");
205
206 Method* me = get_Method();
207 Arena* arena = CURRENT_THREAD_ENV->arena();
208
209 // Load the bytecodes.
210 _code = (address)arena->Amalloc(code_size());
211 memcpy(_code, me->code_base(), code_size());
212
213 #if INCLUDE_JVMTI
214 // Revert any breakpoint bytecodes in ci's copy
215 if (me->number_of_breakpoints() > 0) {
216 BreakpointInfo* bp = me->method_holder()->breakpoints();
217 for (; bp != nullptr; bp = bp->next()) {
218 if (bp->match(me)) {
219 code_at_put(bp->bci(), bp->orig_bytecode());
220 }
221 }
222 }
223 #endif
224
225 // And load the exception table.
226 ExceptionTable exc_table(me);
227
228 // Allocate one extra spot in our list of exceptions. This
229 // last entry will be used to represent the possibility that
230 // an exception escapes the method. See ciExceptionHandlerStream
231 // for details.
232 _exception_handlers =
233 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
234 * (_handler_count + 1));
235 if (_handler_count > 0) {
236 for (int i=0; i<_handler_count; i++) {
237 _exception_handlers[i] = new (arena) ciExceptionHandler(
238 holder(),
239 /* start */ exc_table.start_pc(i),
240 /* limit */ exc_table.end_pc(i),
241 /* goto pc */ exc_table.handler_pc(i),
242 /* cp index */ exc_table.catch_type_index(i));
243 }
244 }
245
246 // Put an entry at the end of our list to represent the possibility
247 // of exceptional exit.
248 _exception_handlers[_handler_count] =
249 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
250
251 if (CIPrintMethodCodes) {
252 print_codes();
253 }
254 }
255
256
257 // ------------------------------------------------------------------
258 // ciMethod::has_linenumber_table
259 //
260 // length unknown until decompression
261 bool ciMethod::has_linenumber_table() const {
262 check_is_loaded();
263 VM_ENTRY_MARK;
264 return get_Method()->has_linenumber_table();
265 }
266
267
268 // ------------------------------------------------------------------
269 // ciMethod::line_number_from_bci
270 int ciMethod::line_number_from_bci(int bci) const {
271 check_is_loaded();
272 VM_ENTRY_MARK;
273 return get_Method()->line_number_from_bci(bci);
274 }
275
276
277 // ------------------------------------------------------------------
278 // ciMethod::vtable_index
279 //
280 // Get the position of this method's entry in the vtable, if any.
281 int ciMethod::vtable_index() {
282 check_is_loaded();
283 assert(holder()->is_linked(), "must be linked");
284 VM_ENTRY_MARK;
285 return get_Method()->vtable_index();
286 }
287
288 // ------------------------------------------------------------------
289 // ciMethod::uses_balanced_monitors
290 //
291 // Does this method use monitors in a strict stack-disciplined manner?
292 bool ciMethod::has_balanced_monitors() {
293 check_is_loaded();
294 if (_balanced_monitors) return true;
295
296 // Analyze the method to see if monitors are used properly.
297 VM_ENTRY_MARK;
298 methodHandle method(THREAD, get_Method());
299 assert(method->has_monitor_bytecodes(), "should have checked this");
300
301 // Check to see if a previous compilation computed the
302 // monitor-matching analysis.
303 if (method->guaranteed_monitor_matching()) {
304 _balanced_monitors = true;
305 return true;
306 }
307
308 {
309 ExceptionMark em(THREAD);
310 ResourceMark rm(THREAD);
311 GeneratePairingInfo gpi(method);
312 if (!gpi.compute_map(THREAD)) {
313 fatal("Unrecoverable verification or out-of-memory error");
314 }
315 if (!gpi.monitor_safe()) {
316 return false;
317 }
318 method->set_guaranteed_monitor_matching();
319 _balanced_monitors = true;
320 }
321 return true;
322 }
323
324
325 // ------------------------------------------------------------------
326 // ciMethod::get_flow_analysis
327 ciTypeFlow* ciMethod::get_flow_analysis() {
328 #if defined(COMPILER2)
329 if (_flow == nullptr) {
330 ciEnv* env = CURRENT_ENV;
331 _flow = new (env->arena()) ciTypeFlow(env, this);
332 _flow->do_flow();
333 }
334 return _flow;
335 #else // COMPILER2
336 ShouldNotReachHere();
337 return nullptr;
338 #endif // COMPILER2
339 }
340
341
342 // ------------------------------------------------------------------
343 // ciMethod::get_osr_flow_analysis
344 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
345 #if defined(COMPILER2)
346 // OSR entry points are always place after a call bytecode of some sort
347 assert(osr_bci >= 0, "must supply valid OSR entry point");
348 ciEnv* env = CURRENT_ENV;
349 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
350 flow->do_flow();
351 return flow;
352 #else // COMPILER2
353 ShouldNotReachHere();
354 return nullptr;
355 #endif // COMPILER2
356 }
357
358 // ------------------------------------------------------------------
359 // ciMethod::raw_liveness_at_bci
360 //
361 // Which local variables are live at a specific bci?
362 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
363 check_is_loaded();
364 if (_liveness == nullptr) {
365 // Create the liveness analyzer.
366 Arena* arena = CURRENT_ENV->arena();
367 _liveness = new (arena) MethodLiveness(arena, this);
368 _liveness->compute_liveness();
369 }
370 return _liveness->get_liveness_at(bci);
371 }
372
373 // ------------------------------------------------------------------
374 // ciMethod::liveness_at_bci
375 //
376 // Which local variables are live at a specific bci? When debugging
377 // will return true for all locals in some cases to improve debug
378 // information.
379 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
380 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
381 // Keep all locals live for the user's edification and amusement.
382 MethodLivenessResult result(_max_locals);
383 result.set_range(0, _max_locals);
384 result.set_is_valid();
385 return result;
386 }
387 return raw_liveness_at_bci(bci);
388 }
389
390 // ciMethod::live_local_oops_at_bci
391 //
392 // find all the live oops in the locals array for a particular bci
393 // Compute what the interpreter believes by using the interpreter
394 // oopmap generator. This is used as a double check during osr to
395 // guard against conservative result from MethodLiveness making us
396 // think a dead oop is live. MethodLiveness is conservative in the
397 // sense that it may consider locals to be live which cannot be live,
398 // like in the case where a local could contain an oop or a primitive
399 // along different paths. In that case the local must be dead when
400 // those paths merge. Since the interpreter's viewpoint is used when
401 // gc'ing an interpreter frame we need to use its viewpoint during
402 // OSR when loading the locals.
403
404 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
405 VM_ENTRY_MARK;
406 InterpreterOopMap mask;
407 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
408 int mask_size = max_locals();
409 ResourceBitMap result(mask_size);
410 int i;
411 for (i = 0; i < mask_size ; i++ ) {
412 if (mask.is_oop(i)) result.set_bit(i);
413 }
414 return result;
415 }
416
417
418 #ifdef COMPILER1
419 // ------------------------------------------------------------------
420 // ciMethod::bci_block_start
421 //
422 // Marks all bcis where a new basic block starts
423 const BitMap& ciMethod::bci_block_start() {
424 check_is_loaded();
425 if (_liveness == nullptr) {
426 // Create the liveness analyzer.
427 Arena* arena = CURRENT_ENV->arena();
428 _liveness = new (arena) MethodLiveness(arena, this);
429 _liveness->compute_liveness();
430 }
431
432 return _liveness->get_bci_block_start();
433 }
434 #endif // COMPILER1
435
436
437 // ------------------------------------------------------------------
438 // ciMethod::check_overflow
439 //
440 // Check whether the profile counter is overflowed and adjust if true.
441 // For invoke* it will turn negative values into max_jint,
442 // and for checkcast/aastore/instanceof turn positive values into min_jint.
443 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
444 switch (code) {
445 case Bytecodes::_aastore: // fall-through
446 case Bytecodes::_checkcast: // fall-through
447 case Bytecodes::_instanceof: {
448 if (VM_Version::profile_all_receivers_at_type_check()) {
449 return (c < 0 ? max_jint : c); // always non-negative
450 }
451 return (c > 0 ? min_jint : c); // always non-positive
452 }
453 default: {
454 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
455 return (c < 0 ? max_jint : c); // always non-negative
456 }
457 }
458 }
459
460
461 // ------------------------------------------------------------------
462 // ciMethod::call_profile_at_bci
463 //
464 // Get the ciCallProfile for the invocation of this method.
465 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
466 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
467 ResourceMark rm;
468 ciCallProfile result;
469 if (method_data() != nullptr && method_data()->is_mature()) {
470 ciProfileData* data = method_data()->bci_to_data(bci);
471 if (data != nullptr && data->is_CounterData()) {
472 // Every profiled call site has a counter.
473 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
474
475 if (!data->is_ReceiverTypeData()) {
476 result._receiver_count[0] = 0; // that's a definite zero
477 } else { // ReceiverTypeData is a subclass of CounterData
478 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
479 // In addition, virtual call sites have receiver type information
480 int receivers_count_total = 0;
481 int morphism = 0;
482 // Precompute morphism for the possible fixup
483 for (uint i = 0; i < call->row_limit(); i++) {
484 ciKlass* receiver = call->receiver(i);
485 if (receiver == nullptr) continue;
486 morphism++;
487 }
488 int epsilon = 0;
489 // For a call, it is assumed that either the type of the receiver(s)
490 // is recorded or an associated counter is incremented, but not both. With
491 // tiered compilation, however, both can happen due to the interpreter and
492 // C1 profiling invocations differently. Address that inconsistency here.
493 if (morphism == 1 && count > 0) {
494 epsilon = count;
495 count = 0;
496 }
497 for (uint i = 0; i < call->row_limit(); i++) {
498 ciKlass* receiver = call->receiver(i);
499 if (receiver == nullptr) continue;
500 int rcount = saturated_add(call->receiver_count(i), epsilon);
501 if (rcount == 0) rcount = 1; // Should be valid value
502 receivers_count_total = saturated_add(receivers_count_total, rcount);
503 // Add the receiver to result data.
504 result.add_receiver(receiver, rcount);
505 // If we extend profiling to record methods,
506 // we will set result._method also.
507 }
508 // Determine call site's morphism.
509 // The call site count is 0 with known morphism (only 1 or 2 receivers)
510 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
511 // The call site count is > 0 in the case of a polymorphic virtual call.
512 if (morphism > 0 && morphism == result._limit) {
513 // The morphism <= MorphismLimit.
514 if ((morphism < ciCallProfile::MorphismLimit) ||
515 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
516 #ifdef ASSERT
517 if (count > 0) {
518 this->print_short_name(tty);
519 tty->print_cr(" @ bci:%d", bci);
520 this->print_codes();
521 assert(false, "this call site should not be polymorphic");
522 }
523 #endif
524 result._morphism = morphism;
525 }
526 }
527 // Make the count consistent if this is a call profile. If count is
528 // zero or less, presume that this is a typecheck profile and
529 // do nothing. Otherwise, increase count to be the sum of all
530 // receiver's counts.
531 if (count >= 0) {
532 count = saturated_add(count, receivers_count_total);
533 }
534 }
535 result._count = count;
536 }
537 }
538 return result;
539 }
540
541 // ------------------------------------------------------------------
542 // Add new receiver and sort data by receiver's profile count.
543 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
544 // Add new receiver and sort data by receiver's counts when we have space
545 // for it otherwise replace the less called receiver (less called receiver
546 // is placed to the last array element which is not used).
547 // First array's element contains most called receiver.
548 int i = _limit;
549 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
550 _receiver[i] = _receiver[i-1];
551 _receiver_count[i] = _receiver_count[i-1];
552 }
553 _receiver[i] = receiver;
554 _receiver_count[i] = receiver_count;
555 if (_limit < MorphismLimit) _limit++;
556 }
557
558
559 void ciMethod::assert_virtual_call_type_ok(int bci) {
560 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
561 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
562 }
563
564 void ciMethod::assert_call_type_ok(int bci) {
565 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
566 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
567 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
568 }
569
570 /**
571 * Check whether profiling provides a type for the argument i to the
572 * call at bci bci
573 *
574 * @param [in]bci bci of the call
575 * @param [in]i argument number
576 * @param [out]type profiled type of argument, null if none
577 * @param [out]ptr_kind whether always null, never null or maybe null
578 * @return true if profiling exists
579 *
580 */
581 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
582 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
583 ciProfileData* data = method_data()->bci_to_data(bci);
584 if (data != nullptr) {
585 if (data->is_VirtualCallTypeData()) {
586 assert_virtual_call_type_ok(bci);
587 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
588 if (i >= call->number_of_arguments()) {
589 return false;
590 }
591 type = call->valid_argument_type(i);
592 ptr_kind = call->argument_ptr_kind(i);
593 return true;
594 } else if (data->is_CallTypeData()) {
595 assert_call_type_ok(bci);
596 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
597 if (i >= call->number_of_arguments()) {
598 return false;
599 }
600 type = call->valid_argument_type(i);
601 ptr_kind = call->argument_ptr_kind(i);
602 return true;
603 }
604 }
605 }
606 return false;
607 }
608
609 /**
610 * Check whether profiling provides a type for the return value from
611 * the call at bci bci
612 *
613 * @param [in]bci bci of the call
614 * @param [out]type profiled type of argument, null if none
615 * @param [out]ptr_kind whether always null, never null or maybe null
616 * @return true if profiling exists
617 *
618 */
619 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
620 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) {
621 ciProfileData* data = method_data()->bci_to_data(bci);
622 if (data != nullptr) {
623 if (data->is_VirtualCallTypeData()) {
624 assert_virtual_call_type_ok(bci);
625 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
626 if (call->has_return()) {
627 type = call->valid_return_type();
628 ptr_kind = call->return_ptr_kind();
629 return true;
630 }
631 } else if (data->is_CallTypeData()) {
632 assert_call_type_ok(bci);
633 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
634 if (call->has_return()) {
635 type = call->valid_return_type();
636 ptr_kind = call->return_ptr_kind();
637 }
638 return true;
639 }
640 }
641 }
642 return false;
643 }
644
645 /**
646 * Check whether profiling provides a type for the parameter i
647 *
648 * @param [in]i parameter number
649 * @param [out]type profiled type of parameter, null if none
650 * @param [out]ptr_kind whether always null, never null or maybe null
651 * @return true if profiling exists
652 *
653 */
654 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
655 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
656 ciParametersTypeData* parameters = method_data()->parameters_type_data();
657 if (parameters != nullptr && i < parameters->number_of_parameters()) {
658 type = parameters->valid_parameter_type(i);
659 ptr_kind = parameters->parameter_ptr_kind(i);
660 return true;
661 }
662 }
663 return false;
664 }
665
666 bool ciMethod::array_access_profiled_type(int bci, ciKlass*& array_type, ciKlass*& element_type, ProfilePtrKind& element_ptr, bool &flat_array, bool &null_free_array) {
667 if (method_data() != nullptr && method_data()->is_mature()) {
668 ciProfileData* data = method_data()->bci_to_data(bci);
669 if (data != nullptr) {
670 if (data->is_ArrayLoadData()) {
671 ciArrayLoadData* array_access = (ciArrayLoadData*) data->as_ArrayLoadData();
672 array_type = array_access->array()->valid_type();
673 element_type = array_access->element()->valid_type();
674 element_ptr = array_access->element()->ptr_kind();
675 flat_array = array_access->flat_array();
676 null_free_array = array_access->null_free_array();
677 #ifdef ASSERT
678 if (array_type != nullptr) {
679 bool flat = array_type->is_flat_array_klass();
680 bool null_free = array_type->as_array_klass()->is_elem_null_free();
681 assert(!flat || flat_array, "inconsistency");
682 assert(!null_free || null_free_array, "inconsistency");
683 }
684 #endif
685 return true;
686 } else if (data->is_ArrayStoreData()) {
687 ciArrayStoreData* array_access = (ciArrayStoreData*) data->as_ArrayStoreData();
688 array_type = array_access->array()->valid_type();
689 flat_array = array_access->flat_array();
690 null_free_array = array_access->null_free_array();
691 ciCallProfile call_profile = call_profile_at_bci(bci);
692 if (call_profile.morphism() == 1) {
693 element_type = call_profile.receiver(0);
694 } else {
695 element_type = nullptr;
696 }
697 if (!array_access->null_seen()) {
698 element_ptr = ProfileNeverNull;
699 } else if (call_profile.count() == 0) {
700 element_ptr = ProfileAlwaysNull;
701 } else {
702 element_ptr = ProfileMaybeNull;
703 }
704 #ifdef ASSERT
705 if (array_type != nullptr) {
706 bool flat = array_type->is_flat_array_klass();
707 bool null_free = array_type->as_array_klass()->is_elem_null_free();
708 assert(!flat || flat_array, "inconsistency");
709 assert(!null_free || null_free_array, "inconsistency");
710 }
711 #endif
712 return true;
713 }
714 }
715 }
716 return false;
717 }
718
719 bool ciMethod::acmp_profiled_type(int bci, ciKlass*& left_type, ciKlass*& right_type, ProfilePtrKind& left_ptr, ProfilePtrKind& right_ptr, bool &left_inline_type, bool &right_inline_type) {
720 if (method_data() != nullptr && method_data()->is_mature()) {
721 ciProfileData* data = method_data()->bci_to_data(bci);
722 if (data != nullptr && data->is_ACmpData()) {
723 ciACmpData* acmp = (ciACmpData*)data->as_ACmpData();
724 left_type = acmp->left()->valid_type();
725 right_type = acmp->right()->valid_type();
726 left_ptr = acmp->left()->ptr_kind();
727 right_ptr = acmp->right()->ptr_kind();
728 left_inline_type = acmp->left_inline_type();
729 right_inline_type = acmp->right_inline_type();
730 return true;
731 }
732 }
733 return false;
734 }
735
736
737 // ------------------------------------------------------------------
738 // ciMethod::find_monomorphic_target
739 //
740 // Given a certain calling environment, find the monomorphic target
741 // for the call. Return null if the call is not monomorphic in
742 // its calling environment, or if there are only abstract methods.
743 // The returned method is never abstract.
744 // Note: If caller uses a non-null result, it must inform dependencies
745 // via assert_unique_concrete_method or assert_leaf_type.
746 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
747 ciInstanceKlass* callee_holder,
748 ciInstanceKlass* actual_recv,
749 bool check_access) {
750 check_is_loaded();
751
752 if (actual_recv->is_interface()) {
753 // %%% We cannot trust interface types, yet. See bug 6312651.
754 return nullptr;
755 }
756
757 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
758 if (root_m == nullptr) {
759 // Something went wrong looking up the actual receiver method.
760 return nullptr;
761 }
762
763 // Make certain quick checks even if UseCHA is false.
764
765 // Is it private or final?
766 if (root_m->can_be_statically_bound()) {
767 assert(!root_m->is_abstract(), "sanity");
768 return root_m;
769 }
770
771 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
772 // Easy case. There is no other place to put a method, so don't bother
773 // to go through the VM_ENTRY_MARK and all the rest.
774 if (root_m->is_abstract()) {
775 return nullptr;
776 }
777 return root_m;
778 }
779
780 // Array methods (clone, hashCode, etc.) are always statically bound.
781 // If we were to see an array type here, we'd return root_m.
782 // However, this method processes only ciInstanceKlasses. (See 4962591.)
783 // The inline_native_clone intrinsic narrows Object to T[] properly,
784 // so there is no need to do the same job here.
785
786 if (!UseCHA) return nullptr;
787
788 VM_ENTRY_MARK;
789
790 methodHandle target;
791 {
792 MutexLocker locker(Compile_lock);
793 InstanceKlass* context = actual_recv->get_instanceKlass();
794 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
795 root_m->get_Method(),
796 callee_holder->get_Klass(),
797 this->get_Method()));
798 assert(target() == nullptr || !target()->is_abstract(), "not allowed");
799 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
800 }
801
802 #ifndef PRODUCT
803 LogTarget(Debug, dependencies) lt;
804 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) {
805 LogStream ls(<);
806 ls.print("found a non-root unique target method");
807 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name());
808 ls.print(" method = ");
809 target->print_short_name(&ls);
810 ls.cr();
811 }
812 #endif //PRODUCT
813
814 if (target() == nullptr) {
815 return nullptr;
816 }
817
818 // Redefinition support.
819 if (this->is_old() || root_m->is_old() || target->is_old()) {
820 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
821 return nullptr;
822 }
823
824 if (target() == root_m->get_Method()) {
825 return root_m;
826 }
827 if (!root_m->is_public() &&
828 !root_m->is_protected()) {
829 // If we are going to reason about inheritance, it's easiest
830 // if the method in question is public, protected, or private.
831 // If the answer is not root_m, it is conservatively correct
832 // to return null, even if the CHA encountered irrelevant
833 // methods in other packages.
834 // %%% TO DO: Work out logic for package-private methods
835 // with the same name but different vtable indexes.
836 return nullptr;
837 }
838 return CURRENT_THREAD_ENV->get_method(target());
839 }
840
841 // ------------------------------------------------------------------
842 // ciMethod::can_be_statically_bound
843 //
844 // Tries to determine whether a method can be statically bound in some context.
845 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
846 return (holder() == context) && can_be_statically_bound();
847 }
848
849 // ------------------------------------------------------------------
850 // ciMethod::can_omit_stack_trace
851 //
852 // Tries to determine whether a method can omit stack trace in throw in compiled code.
853 bool ciMethod::can_omit_stack_trace() const {
854 if (!StackTraceInThrowable) {
855 return true; // stack trace is switched off.
856 }
857 if (!OmitStackTraceInFastThrow) {
858 return false; // Have to provide stack trace.
859 }
860 return _can_omit_stack_trace;
861 }
862
863 // ------------------------------------------------------------------
864 // ciMethod::resolve_invoke
865 //
866 // Given a known receiver klass, find the target for the call.
867 // Return null if the call has no target or the target is abstract.
868 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
869 check_is_loaded();
870 VM_ENTRY_MARK;
871
872 Klass* caller_klass = caller->get_Klass();
873 Klass* recv = exact_receiver->get_Klass();
874 Klass* resolved = holder()->get_Klass();
875 Symbol* h_name = name()->get_symbol();
876 Symbol* h_signature = signature()->get_symbol();
877
878 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
879 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
880 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
881 Method* m = nullptr;
882 // Only do exact lookup if receiver klass has been linked. Otherwise,
883 // the vtable has not been setup, and the LinkResolver will fail.
884 if (recv->is_array_klass()
885 ||
886 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
887 if (holder()->is_interface()) {
888 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
889 } else {
890 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
891 }
892 }
893
894 if (m == nullptr) {
895 // Return null only if there was a problem with lookup (uninitialized class, etc.)
896 return nullptr;
897 }
898
899 ciMethod* result = this;
900 if (m != get_Method()) {
901 // Redefinition support.
902 if (this->is_old() || m->is_old()) {
903 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
904 return nullptr;
905 }
906
907 result = CURRENT_THREAD_ENV->get_method(m);
908 }
909
910 if (result->is_abstract() && !allow_abstract) {
911 // Don't return abstract methods because they aren't optimizable or interesting.
912 return nullptr;
913 }
914 return result;
915 }
916
917 // ------------------------------------------------------------------
918 // ciMethod::resolve_vtable_index
919 //
920 // Given a known receiver klass, find the vtable index for the call.
921 // Return Method::invalid_vtable_index if the vtable_index is unknown.
922 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
923 check_is_loaded();
924
925 int vtable_index = Method::invalid_vtable_index;
926 // Only do lookup if receiver klass has been linked. Otherwise,
927 // the vtable has not been setup, and the LinkResolver will fail.
928 if (!receiver->is_interface()
929 && (!receiver->is_instance_klass() ||
930 receiver->as_instance_klass()->is_linked())) {
931 VM_ENTRY_MARK;
932
933 Klass* caller_klass = caller->get_Klass();
934 Klass* recv = receiver->get_Klass();
935 Symbol* h_name = name()->get_symbol();
936 Symbol* h_signature = signature()->get_symbol();
937
938 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
939 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
940 if (vtable_index == Method::nonvirtual_vtable_index) {
941 // A statically bound method. Return "no such index".
942 vtable_index = Method::invalid_vtable_index;
943 }
944 }
945
946 return vtable_index;
947 }
948
949 // ------------------------------------------------------------------
950 // ciMethod::get_field_at_bci
951 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
952 ciBytecodeStream iter(this);
953 iter.reset_to_bci(bci);
954 iter.next();
955 return iter.get_field(will_link);
956 }
957
958 // ------------------------------------------------------------------
959 // ciMethod::get_method_at_bci
960 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
961 ciBytecodeStream iter(this);
962 iter.reset_to_bci(bci);
963 iter.next();
964 return iter.get_method(will_link, declared_signature);
965 }
966
967 // ------------------------------------------------------------------
968 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
969 ciBytecodeStream iter(this);
970 iter.reset_to_bci(bci);
971 iter.next();
972 return iter.get_declared_method_holder();
973 }
974
975 // ------------------------------------------------------------------
976 // Adjust a CounterData count to be commensurate with
977 // interpreter_invocation_count. If the MDO exists for
978 // only 25% of the time the method exists, then the
979 // counts in the MDO should be scaled by 4X, so that
980 // they can be usefully and stably compared against the
981 // invocation counts in methods.
982 int ciMethod::scale_count(int count, float prof_factor) {
983 if (count > 0 && method_data() != nullptr) {
984 int counter_life = method_data()->invocation_count();
985 int method_life = interpreter_invocation_count();
986 if (method_life < counter_life) { // may happen because of the snapshot timing
987 method_life = counter_life;
988 }
989 if (counter_life > 0) {
990 double count_d = (double)count * prof_factor * method_life / counter_life + 0.5;
991 if (count_d >= static_cast<double>(INT_MAX)) {
992 // Clamp in case of overflowing int range.
993 count = INT_MAX;
994 } else {
995 count = int(count_d);
996 count = (count > 0) ? count : 1;
997 }
998 } else {
999 count = 1;
1000 }
1001 }
1002 return count;
1003 }
1004
1005
1006 // ------------------------------------------------------------------
1007 // ciMethod::is_special_get_caller_class_method
1008 //
1009 bool ciMethod::is_ignored_by_security_stack_walk() const {
1010 check_is_loaded();
1011 VM_ENTRY_MARK;
1012 return get_Method()->is_ignored_by_security_stack_walk();
1013 }
1014
1015 // ------------------------------------------------------------------
1016 // ciMethod::needs_clinit_barrier
1017 //
1018 bool ciMethod::needs_clinit_barrier() const {
1019 check_is_loaded();
1020 return is_static() && !holder()->is_initialized();
1021 }
1022
1023 // ------------------------------------------------------------------
1024 // invokedynamic support
1025
1026 // ------------------------------------------------------------------
1027 // ciMethod::is_method_handle_intrinsic
1028 //
1029 // Return true if the method is an instance of the JVM-generated
1030 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
1031 bool ciMethod::is_method_handle_intrinsic() const {
1032 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1033 return (MethodHandles::is_signature_polymorphic(iid) &&
1034 MethodHandles::is_signature_polymorphic_intrinsic(iid));
1035 }
1036
1037 // ------------------------------------------------------------------
1038 // ciMethod::is_compiled_lambda_form
1039 //
1040 // Return true if the method is a generated MethodHandle adapter.
1041 // These are built by Java code.
1042 bool ciMethod::is_compiled_lambda_form() const {
1043 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1044 return iid == vmIntrinsics::_compiledLambdaForm;
1045 }
1046
1047 // ------------------------------------------------------------------
1048 // ciMethod::is_object_constructor
1049 //
1050 bool ciMethod::is_object_constructor() const {
1051 return (name() == ciSymbols::object_initializer_name()
1052 && signature()->return_type()->is_void());
1053 // Note: We can't test is_static, because that would
1054 // require the method to be loaded. Sometimes it isn't.
1055 }
1056
1057 // ------------------------------------------------------------------
1058 // ciMethod::is_scoped
1059 //
1060 // Return true for methods annotated with @Scoped
1061 bool ciMethod::is_scoped() const {
1062 return get_Method()->is_scoped();
1063 }
1064
1065 // ------------------------------------------------------------------
1066 // ciMethod::has_member_arg
1067 //
1068 // Return true if the method is a linker intrinsic like _linkToVirtual.
1069 // These are built by the JVM.
1070 bool ciMethod::has_member_arg() const {
1071 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1072 return (MethodHandles::is_signature_polymorphic(iid) &&
1073 MethodHandles::has_member_arg(iid));
1074 }
1075
1076 // ------------------------------------------------------------------
1077 // ciMethod::ensure_method_data
1078 //
1079 // Generate new MethodData* objects at compile time.
1080 // Return true if allocation was successful or no MDO is required.
1081 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1082 EXCEPTION_CONTEXT;
1083 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1084 return true;
1085 }
1086 if (h_m()->method_data() == nullptr) {
1087 Method::build_profiling_method_data(h_m, THREAD);
1088 if (HAS_PENDING_EXCEPTION) {
1089 CLEAR_PENDING_EXCEPTION;
1090 }
1091 }
1092 if (h_m()->method_data() != nullptr) {
1093 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1094 return _method_data->load_data();
1095 } else {
1096 _method_data = CURRENT_ENV->get_empty_methodData();
1097 return false;
1098 }
1099 }
1100
1101 // public, retroactive version
1102 bool ciMethod::ensure_method_data() {
1103 bool result = true;
1104 if (_method_data == nullptr || _method_data->is_empty()) {
1105 GUARDED_VM_ENTRY({
1106 methodHandle mh(Thread::current(), get_Method());
1107 result = ensure_method_data(mh);
1108 });
1109 }
1110 return result;
1111 }
1112
1113
1114 // ------------------------------------------------------------------
1115 // ciMethod::method_data
1116 //
1117 ciMethodData* ciMethod::method_data() {
1118 if (_method_data != nullptr) {
1119 return _method_data;
1120 }
1121 VM_ENTRY_MARK;
1122 ciEnv* env = CURRENT_ENV;
1123 Thread* my_thread = JavaThread::current();
1124 methodHandle h_m(my_thread, get_Method());
1125
1126 if (h_m()->method_data() != nullptr) {
1127 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1128 _method_data->load_data();
1129 } else {
1130 _method_data = CURRENT_ENV->get_empty_methodData();
1131 }
1132 return _method_data;
1133
1134 }
1135
1136 // ------------------------------------------------------------------
1137 // ciMethod::method_data_or_null
1138 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1139 // null otherwise.
1140 ciMethodData* ciMethod::method_data_or_null() {
1141 ciMethodData *md = method_data();
1142 if (md->is_empty()) {
1143 return nullptr;
1144 }
1145 return md;
1146 }
1147
1148 // ------------------------------------------------------------------
1149 // ciMethod::ensure_method_counters
1150 //
1151 MethodCounters* ciMethod::ensure_method_counters() {
1152 check_is_loaded();
1153 VM_ENTRY_MARK;
1154 methodHandle mh(THREAD, get_Method());
1155 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1156 return method_counters;
1157 }
1158
1159 // ------------------------------------------------------------------
1160 // ciMethod::has_option
1161 //
1162 bool ciMethod::has_option(CompileCommandEnum option) {
1163 check_is_loaded();
1164 VM_ENTRY_MARK;
1165 methodHandle mh(THREAD, get_Method());
1166 return CompilerOracle::has_option(mh, option);
1167 }
1168
1169 // ------------------------------------------------------------------
1170 // ciMethod::has_option_value
1171 //
1172 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1173 check_is_loaded();
1174 VM_ENTRY_MARK;
1175 methodHandle mh(THREAD, get_Method());
1176 return CompilerOracle::has_option_value(mh, option, value);
1177 }
1178 // ------------------------------------------------------------------
1179 // ciMethod::can_be_compiled
1180 //
1181 // Have previous compilations of this method succeeded?
1182 bool ciMethod::can_be_compiled() {
1183 check_is_loaded();
1184 ciEnv* env = CURRENT_ENV;
1185 if (is_c1_compile(env->comp_level())) {
1186 return _is_c1_compilable;
1187 }
1188 return _is_c2_compilable;
1189 }
1190
1191 // ------------------------------------------------------------------
1192 // ciMethod::has_compiled_code
1193 bool ciMethod::has_compiled_code() {
1194 return inline_instructions_size() > 0;
1195 }
1196
1197 int ciMethod::highest_osr_comp_level() {
1198 check_is_loaded();
1199 VM_ENTRY_MARK;
1200 return get_Method()->highest_osr_comp_level();
1201 }
1202
1203 // ------------------------------------------------------------------
1204 // ciMethod::code_size_for_inlining
1205 //
1206 // Code size for inlining decisions. This method returns a code
1207 // size of 1 for methods which has the ForceInline annotation.
1208 int ciMethod::code_size_for_inlining() {
1209 check_is_loaded();
1210 if (get_Method()->force_inline()) {
1211 return 1;
1212 }
1213 return code_size();
1214 }
1215
1216 // ------------------------------------------------------------------
1217 // ciMethod::inline_instructions_size
1218 //
1219 // This is a rough metric for "fat" methods, compared before inlining
1220 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1221 // junk like exception handler, stubs, and constant table, which are
1222 // not highly relevant to an inlined method. So we use the more
1223 // specific accessor nmethod::insts_size.
1224 // Also some instructions inside the code are excluded from inline
1225 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter)
1226 int ciMethod::inline_instructions_size() {
1227 if (_inline_instructions_size == -1) {
1228 if (TrainingData::have_data()) {
1229 GUARDED_VM_ENTRY(
1230 CompLevel level = static_cast<CompLevel>(CURRENT_ENV->comp_level());
1231 methodHandle top_level_mh(Thread::current(), CURRENT_ENV->task()->method());
1232 MethodTrainingData* mtd = MethodTrainingData::find(top_level_mh);
1233 if (mtd != nullptr) {
1234 CompileTrainingData* ctd = mtd->last_toplevel_compile(level);
1235 if (ctd != nullptr) {
1236 methodHandle mh(Thread::current(), get_Method());
1237 MethodTrainingData* this_mtd = MethodTrainingData::find(mh);
1238 if (this_mtd != nullptr) {
1239 auto r = ctd->ci_records().ciMethod__inline_instructions_size.find(this_mtd);
1240 if (r.is_valid()) {
1241 _inline_instructions_size = r.result();
1242 }
1243 }
1244 }
1245 }
1246 );
1247 }
1248 }
1249 if (_inline_instructions_size == -1) {
1250 GUARDED_VM_ENTRY(
1251 nmethod* code = get_Method()->code();
1252 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1253 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size();
1254 _inline_instructions_size = isize > 0 ? isize : 0;
1255 } else {
1256 _inline_instructions_size = 0;
1257 }
1258 if (TrainingData::need_data()) {
1259 CompileTrainingData* ctd = CURRENT_ENV->task()->training_data();
1260 if (ctd != nullptr) {
1261 methodHandle mh(Thread::current(), get_Method());
1262 MethodTrainingData* this_mtd = MethodTrainingData::make(mh);
1263 ctd->ci_records().ciMethod__inline_instructions_size.append_if_missing(_inline_instructions_size, this_mtd);
1264 }
1265 }
1266 );
1267 }
1268 return _inline_instructions_size;
1269 }
1270
1271 // ------------------------------------------------------------------
1272 // ciMethod::log_nmethod_identity
1273 void ciMethod::log_nmethod_identity(xmlStream* log) {
1274 GUARDED_VM_ENTRY(
1275 nmethod* code = get_Method()->code();
1276 if (code != nullptr) {
1277 code->log_identity(log);
1278 }
1279 )
1280 }
1281
1282 // ------------------------------------------------------------------
1283 // ciMethod::is_not_reached
1284 bool ciMethod::is_not_reached(int bci) {
1285 check_is_loaded();
1286 VM_ENTRY_MARK;
1287 return Interpreter::is_not_reached(
1288 methodHandle(THREAD, get_Method()), bci);
1289 }
1290
1291 // ------------------------------------------------------------------
1292 // ciMethod::was_never_executed
1293 bool ciMethod::was_executed_more_than(int times) {
1294 VM_ENTRY_MARK;
1295 return get_Method()->was_executed_more_than(times);
1296 }
1297
1298 // ------------------------------------------------------------------
1299 // ciMethod::has_unloaded_classes_in_signature
1300 bool ciMethod::has_unloaded_classes_in_signature() {
1301 // ciSignature is resolved against some accessing class and
1302 // signature classes aren't required to be local. As a benefit,
1303 // it makes signature classes visible through loader constraints.
1304 // So, encountering an unloaded class signals it is absent both in
1305 // the callee (local) and caller contexts.
1306 return signature()->has_unloaded_classes();
1307 }
1308
1309 // ------------------------------------------------------------------
1310 // ciMethod::is_klass_loaded
1311 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1312 VM_ENTRY_MARK;
1313 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
1314 }
1315
1316 // ------------------------------------------------------------------
1317 // ciMethod::check_call
1318 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1319 // This method is used only in C2 from InlineTree::ok_to_inline,
1320 // and is only used under -Xcomp.
1321 // It appears to fail when applied to an invokeinterface call site.
1322 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1323 VM_ENTRY_MARK;
1324 {
1325 ExceptionMark em(THREAD);
1326 HandleMark hm(THREAD);
1327 constantPoolHandle pool (THREAD, get_Method()->constants());
1328 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1329 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1330 if (HAS_PENDING_EXCEPTION) {
1331 CLEAR_PENDING_EXCEPTION;
1332 return false;
1333 } else {
1334 return (spec_method->is_static() == is_static);
1335 }
1336 }
1337 return false;
1338 }
1339 // ------------------------------------------------------------------
1340 // ciMethod::print_codes
1341 //
1342 // Print the bytecodes for this method.
1343 void ciMethod::print_codes_on(outputStream* st) {
1344 check_is_loaded();
1345 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1346 }
1347
1348
1349 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1350 check_is_loaded(); \
1351 VM_ENTRY_MARK; \
1352 return get_Method()->flag_accessor(); \
1353 }
1354
1355 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1356 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1357 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1358 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1359 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1360 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1361
1362 bool ciMethod::is_boxing_method() const {
1363 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1364 switch (intrinsic_id()) {
1365 case vmIntrinsics::_Boolean_valueOf:
1366 case vmIntrinsics::_Byte_valueOf:
1367 case vmIntrinsics::_Character_valueOf:
1368 case vmIntrinsics::_Short_valueOf:
1369 case vmIntrinsics::_Integer_valueOf:
1370 case vmIntrinsics::_Long_valueOf:
1371 case vmIntrinsics::_Float_valueOf:
1372 case vmIntrinsics::_Double_valueOf:
1373 return true;
1374 default:
1375 return false;
1376 }
1377 }
1378 return false;
1379 }
1380
1381 bool ciMethod::is_unboxing_method() const {
1382 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1383 switch (intrinsic_id()) {
1384 case vmIntrinsics::_booleanValue:
1385 case vmIntrinsics::_byteValue:
1386 case vmIntrinsics::_charValue:
1387 case vmIntrinsics::_shortValue:
1388 case vmIntrinsics::_intValue:
1389 case vmIntrinsics::_longValue:
1390 case vmIntrinsics::_floatValue:
1391 case vmIntrinsics::_doubleValue:
1392 return true;
1393 default:
1394 return false;
1395 }
1396 }
1397 return false;
1398 }
1399
1400 bool ciMethod::is_vector_method() const {
1401 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1402 (intrinsic_id() != vmIntrinsics::_none);
1403 }
1404
1405 BCEscapeAnalyzer *ciMethod::get_bcea() {
1406 #ifdef COMPILER2
1407 if (_bcea == nullptr) {
1408 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr);
1409 }
1410 return _bcea;
1411 #else // COMPILER2
1412 ShouldNotReachHere();
1413 return nullptr;
1414 #endif // COMPILER2
1415 }
1416
1417 ciMethodBlocks *ciMethod::get_method_blocks() {
1418 if (_method_blocks == nullptr) {
1419 Arena *arena = CURRENT_ENV->arena();
1420 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1421 }
1422 return _method_blocks;
1423 }
1424
1425 #undef FETCH_FLAG_FROM_VM
1426
1427 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1428 st->print("%s %s %s",
1429 CURRENT_ENV->replay_name(method->method_holder()),
1430 method->name()->as_quoted_ascii(),
1431 method->signature()->as_quoted_ascii());
1432 }
1433
1434 void ciMethod::dump_name_as_ascii(outputStream* st) {
1435 Method* method = get_Method();
1436 dump_name_as_ascii(st, method);
1437 }
1438
1439 void ciMethod::dump_replay_data(outputStream* st) {
1440 ResourceMark rm;
1441 Method* method = get_Method();
1442 if (MethodHandles::is_signature_polymorphic_method(method)) {
1443 // ignore for now
1444 return;
1445 }
1446 MethodCounters* mcs = method->method_counters();
1447 st->print("ciMethod ");
1448 dump_name_as_ascii(st);
1449 st->print_cr(" %d %d %d %d %d",
1450 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(),
1451 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(),
1452 interpreter_invocation_count(),
1453 interpreter_throwout_count(),
1454 _inline_instructions_size);
1455 }
1456
1457 // ------------------------------------------------------------------
1458 // ciMethod::print_codes
1459 //
1460 // Print a range of the bytecodes for this method.
1461 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1462 check_is_loaded();
1463 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1464 }
1465
1466 // ------------------------------------------------------------------
1467 // ciMethod::print_name
1468 //
1469 // Print the name of this method, including signature and some flags.
1470 void ciMethod::print_name(outputStream* st) {
1471 check_is_loaded();
1472 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1473 }
1474
1475 // ------------------------------------------------------------------
1476 // ciMethod::print_short_name
1477 //
1478 // Print the name of this method, without signature.
1479 void ciMethod::print_short_name(outputStream* st) {
1480 if (is_loaded()) {
1481 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1482 } else {
1483 // Fall back if method is not loaded.
1484 holder()->print_name_on(st);
1485 st->print("::");
1486 name()->print_symbol_on(st);
1487 if (WizardMode)
1488 signature()->as_symbol()->print_symbol_on(st);
1489 }
1490 }
1491
1492 // ------------------------------------------------------------------
1493 // ciMethod::print_impl
1494 //
1495 // Implementation of the print method.
1496 void ciMethod::print_impl(outputStream* st) {
1497 ciMetadata::print_impl(st);
1498 st->print(" name=");
1499 name()->print_symbol_on(st);
1500 st->print(" holder=");
1501 holder()->print_name_on(st);
1502 st->print(" signature=");
1503 signature()->as_symbol()->print_symbol_on(st);
1504 if (is_loaded()) {
1505 st->print(" loaded=true");
1506 st->print(" arg_size=%d", arg_size());
1507 st->print(" flags=");
1508 flags().print_member_flags(st);
1509 } else {
1510 st->print(" loaded=false");
1511 }
1512 }
1513
1514 // ------------------------------------------------------------------
1515
1516 static BasicType erase_to_word_type(BasicType bt) {
1517 if (is_subword_type(bt)) return T_INT;
1518 if (is_reference_type(bt)) return T_OBJECT;
1519 return bt;
1520 }
1521
1522 static bool basic_types_match(ciType* t1, ciType* t2) {
1523 if (t1 == t2) return true;
1524 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1525 }
1526
1527 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1528 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1529 !resolved_method->is_method_handle_intrinsic();
1530
1531 if (!invoke_through_mh_intrinsic) {
1532 // Method name & descriptor should stay the same.
1533 // Signatures may reference unloaded types and thus they may be not strictly equal.
1534 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1535 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1536
1537 return (declared_method->name()->equals(resolved_method->name())) &&
1538 (declared_signature->equals(resolved_signature));
1539 }
1540
1541 ciMethod* linker = declared_method;
1542 ciMethod* target = resolved_method;
1543 // Linkers have appendix argument which is not passed to callee.
1544 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1545 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1546 return false; // argument slot count mismatch
1547 }
1548
1549 ciSignature* linker_sig = linker->signature();
1550 ciSignature* target_sig = target->signature();
1551
1552 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1553 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1554 return false; // argument count mismatch
1555 }
1556
1557 int sbase = 0, rbase = 0;
1558 switch (linker->intrinsic_id()) {
1559 case vmIntrinsics::_linkToVirtual:
1560 case vmIntrinsics::_linkToInterface:
1561 case vmIntrinsics::_linkToSpecial: {
1562 if (target->is_static()) {
1563 return false;
1564 }
1565 if (linker_sig->type_at(0)->is_primitive_type()) {
1566 return false; // receiver should be an oop
1567 }
1568 sbase = 1; // skip receiver
1569 break;
1570 }
1571 case vmIntrinsics::_linkToStatic: {
1572 if (!target->is_static()) {
1573 return false;
1574 }
1575 break;
1576 }
1577 case vmIntrinsics::_invokeBasic: {
1578 if (target->is_static()) {
1579 if (target_sig->type_at(0)->is_primitive_type()) {
1580 return false; // receiver should be an oop
1581 }
1582 rbase = 1; // skip receiver
1583 }
1584 break;
1585 }
1586 default:
1587 break;
1588 }
1589 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1590 int arg_count = target_sig->count() - rbase;
1591 for (int i = 0; i < arg_count; i++) {
1592 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1593 return false;
1594 }
1595 }
1596 // Only check the return type if the symbolic info has non-void return type.
1597 // I.e. the return value of the resolved method can be dropped.
1598 if (!linker->return_type()->is_void() &&
1599 !basic_types_match(linker->return_type(), target->return_type())) {
1600 return false;
1601 }
1602 return true; // no mismatch found
1603 }
1604
1605 // ------------------------------------------------------------------
1606
1607 bool ciMethod::is_scalarized_arg(int idx) const {
1608 VM_ENTRY_MARK;
1609 return get_Method()->is_scalarized_arg(idx);
1610 }
1611
1612 bool ciMethod::has_scalarized_args() const {
1613 VM_ENTRY_MARK;
1614 return get_Method()->has_scalarized_args();
1615 }
1616
1617 const GrowableArray<SigEntry>* ciMethod::get_sig_cc() const {
1618 VM_ENTRY_MARK;
1619 if (get_Method()->adapter() == nullptr) {
1620 return nullptr;
1621 }
1622 return get_Method()->adapter()->get_sig_cc();
1623 }
1624
1625 // ciMethod::is_old
1626 //
1627 // Return true for redefined methods
1628 bool ciMethod::is_old() const {
1629 ASSERT_IN_VM;
1630 return get_Method()->is_old();
1631 }