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 "classfile/vmIntrinsics.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/compilerDefinitions.inline.hpp"
39 #include "compiler/compilerOracle.hpp"
40 #include "compiler/compileTask.hpp"
41 #include "compiler/methodLiveness.hpp"
42 #include "interpreter/interpreter.hpp"
43 #include "interpreter/linkResolver.hpp"
44 #include "interpreter/oopMapCache.hpp"
45 #include "logging/log.hpp"
46 #include "logging/logStream.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "oops/generateOopMap.hpp"
50 #include "oops/method.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/trainingData.hpp"
53 #include "prims/methodHandles.hpp"
54 #include "runtime/deoptimization.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "utilities/bitMap.inline.hpp"
58 #include "utilities/xmlstream.hpp"
59 #ifdef COMPILER2
60 #include "ci/bcEscapeAnalyzer.hpp"
61 #include "ci/ciTypeFlow.hpp"
62 #include "oops/method.hpp"
63 #endif
64
65 // ciMethod
66 //
67 // This class represents a Method* in the HotSpot virtual
68 // machine.
69
70
71 // ------------------------------------------------------------------
72 // ciMethod::ciMethod
73 //
74 // Loaded method.
75 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
76 ciMetadata(h_m()),
77 _holder(holder)
78 {
79 assert(h_m() != nullptr, "no null method");
80 assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
81
82 // These fields are always filled in in loaded methods.
83 _flags = ciFlags(h_m->access_flags());
84
85 // Easy to compute, so fill them in now.
86 _max_stack = h_m->max_stack();
87 _max_locals = h_m->max_locals();
88 _code_size = h_m->code_size();
89 _handler_count = h_m->exception_table_length();
90 _size_of_parameters = h_m->size_of_parameters();
91 _uses_monitors = h_m->has_monitor_bytecodes();
92 _balanced_monitors = !_uses_monitors || h_m->guaranteed_monitor_matching();
93 _is_c1_compilable = !h_m->is_not_c1_compilable();
94 _is_c2_compilable = !h_m->is_not_c2_compilable();
95 _can_be_parsed = true;
96 _has_reserved_stack_access = h_m->has_reserved_stack_access();
97 _is_overpass = h_m->is_overpass();
98 // Lazy fields, filled in on demand. Require allocation.
99 _code = nullptr;
100 _exception_handlers = nullptr;
101 _liveness = nullptr;
102 _method_blocks = nullptr;
103 #if defined(COMPILER2)
104 _flow = nullptr;
105 _bcea = nullptr;
106 #endif // COMPILER2
107
108 // Check for blackhole intrinsic and then populate the intrinsic ID.
109 CompilerOracle::tag_blackhole_if_possible(h_m);
110 _intrinsic_id = h_m->intrinsic_id();
111
112 ciEnv *env = CURRENT_ENV;
113 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
114 // 6328518 check hotswap conditions under the right lock.
115 bool should_take_Compile_lock = !Compile_lock->owned_by_self();
116 ConditionalMutexLocker locker(Compile_lock, should_take_Compile_lock, Mutex::_safepoint_check_flag);
117 if (Dependencies::check_evol_method(h_m()) != nullptr) {
118 _is_c1_compilable = false;
119 _is_c2_compilable = false;
120 _can_be_parsed = false;
121 }
122 } else {
123 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
124 }
125
126 if (h_m->method_holder()->is_linked()) {
127 _can_be_statically_bound = h_m->can_be_statically_bound();
128 _can_omit_stack_trace = h_m->can_omit_stack_trace();
129 } else {
130 // Have to use a conservative value in this case.
131 _can_be_statically_bound = false;
132 _can_omit_stack_trace = true;
133 }
134
135 // Adjust the definition of this condition to be more useful:
136 // %%% take these conditions into account in vtable generation
137 if (!_can_be_statically_bound && h_m->is_private())
138 _can_be_statically_bound = true;
139 if (_can_be_statically_bound && h_m->is_abstract())
140 _can_be_statically_bound = false;
141
142 // generating _signature may allow GC and therefore move m.
143 // These fields are always filled in.
144 _name = env->get_symbol(h_m->name());
145 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
146 constantPoolHandle cpool(Thread::current(), h_m->constants());
147 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
148 _method_data = nullptr;
149 // Take a snapshot of these values, so they will be commensurate with the MDO.
150 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
151 int invcnt = h_m->interpreter_invocation_count();
152 // if the value overflowed report it as max int
153 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
154 _interpreter_throwout_count = h_m->interpreter_throwout_count();
155 } else {
156 _interpreter_invocation_count = 0;
157 _interpreter_throwout_count = 0;
158 }
159 if (_interpreter_invocation_count == 0)
160 _interpreter_invocation_count = 1;
161 _inline_instructions_size = -1;
162 if (ReplayCompiles) {
163 ciReplay::initialize(this);
164 }
165 }
166
167
168 // ------------------------------------------------------------------
169 // ciMethod::ciMethod
170 //
171 // Unloaded method.
172 ciMethod::ciMethod(ciInstanceKlass* holder,
173 ciSymbol* name,
174 ciSymbol* signature,
175 ciInstanceKlass* accessor) :
176 ciMetadata((Metadata*)nullptr),
177 _name( name),
178 _holder( holder),
179 _method_data( nullptr),
180 _method_blocks( nullptr),
181 _intrinsic_id( vmIntrinsics::_none),
182 _inline_instructions_size(-1),
183 _can_be_statically_bound(false),
184 _can_omit_stack_trace(true),
185 _liveness( nullptr)
186 #if defined(COMPILER2)
187 ,
188 _flow( nullptr),
189 _bcea( nullptr)
190 #endif // COMPILER2
191 {
192 // Usually holder and accessor are the same type but in some cases
193 // the holder has the wrong class loader (e.g. invokedynamic call
194 // sites) so we pass the accessor.
195 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
196 }
197
198
199 // ------------------------------------------------------------------
200 // ciMethod::load_code
201 //
202 // Load the bytecodes and exception handler table for this method.
203 void ciMethod::load_code() {
204 VM_ENTRY_MARK;
205 assert(is_loaded(), "only loaded methods have code");
206
207 Method* me = get_Method();
208 Arena* arena = CURRENT_THREAD_ENV->arena();
209
210 // Load the bytecodes.
211 _code = (address)arena->Amalloc(code_size());
212 memcpy(_code, me->code_base(), code_size());
213
214 #if INCLUDE_JVMTI
215 // Revert any breakpoint bytecodes in ci's copy
216 if (me->number_of_breakpoints() > 0) {
217 BreakpointInfo* bp = me->method_holder()->breakpoints();
218 for (; bp != nullptr; bp = bp->next()) {
219 if (bp->match(me)) {
220 code_at_put(bp->bci(), bp->orig_bytecode());
221 }
222 }
223 }
224 #endif
225
226 // And load the exception table.
227 ExceptionTable exc_table(me);
228
229 // Allocate one extra spot in our list of exceptions. This
230 // last entry will be used to represent the possibility that
231 // an exception escapes the method. See ciExceptionHandlerStream
232 // for details.
233 _exception_handlers =
234 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
235 * (_handler_count + 1));
236 if (_handler_count > 0) {
237 for (int i=0; i<_handler_count; i++) {
238 _exception_handlers[i] = new (arena) ciExceptionHandler(
239 holder(),
240 /* start */ exc_table.start_pc(i),
241 /* limit */ exc_table.end_pc(i),
242 /* goto pc */ exc_table.handler_pc(i),
243 /* cp index */ exc_table.catch_type_index(i));
244 }
245 }
246
247 // Put an entry at the end of our list to represent the possibility
248 // of exceptional exit.
249 _exception_handlers[_handler_count] =
250 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
251
252 if (CIPrintMethodCodes) {
253 print_codes();
254 }
255 }
256
257
258 // ------------------------------------------------------------------
259 // ciMethod::has_linenumber_table
260 //
261 // length unknown until decompression
262 bool ciMethod::has_linenumber_table() const {
263 check_is_loaded();
264 VM_ENTRY_MARK;
265 return get_Method()->has_linenumber_table();
266 }
267
268
269 // ------------------------------------------------------------------
270 // ciMethod::line_number_from_bci
271 int ciMethod::line_number_from_bci(int bci) const {
272 check_is_loaded();
273 VM_ENTRY_MARK;
274 return get_Method()->line_number_from_bci(bci);
275 }
276
277
278 // ------------------------------------------------------------------
279 // ciMethod::vtable_index
280 //
281 // Get the position of this method's entry in the vtable, if any.
282 int ciMethod::vtable_index() {
283 check_is_loaded();
284 assert(holder()->is_linked(), "must be linked");
285 VM_ENTRY_MARK;
286 return get_Method()->vtable_index();
287 }
288
289 // ------------------------------------------------------------------
290 // ciMethod::uses_balanced_monitors
291 //
292 // Does this method use monitors in a strict stack-disciplined manner?
293 bool ciMethod::has_balanced_monitors() {
294 check_is_loaded();
295 if (_balanced_monitors) return true;
296
297 // Analyze the method to see if monitors are used properly.
298 VM_ENTRY_MARK;
299 methodHandle method(THREAD, get_Method());
300 assert(method->has_monitor_bytecodes(), "should have checked this");
301
302 // Check to see if a previous compilation computed the
303 // monitor-matching analysis.
304 if (method->guaranteed_monitor_matching()) {
305 _balanced_monitors = true;
306 return true;
307 }
308
309 {
310 ExceptionMark em(THREAD);
311 ResourceMark rm(THREAD);
312 GeneratePairingInfo gpi(method);
313 if (!gpi.compute_map(THREAD)) {
314 fatal("Unrecoverable verification or out-of-memory error");
315 }
316 if (!gpi.monitor_safe()) {
317 return false;
318 }
319 method->set_guaranteed_monitor_matching();
320 _balanced_monitors = true;
321 }
322 return true;
323 }
324
325
326 // ------------------------------------------------------------------
327 // ciMethod::get_flow_analysis
328 ciTypeFlow* ciMethod::get_flow_analysis() {
329 #if defined(COMPILER2)
330 if (_flow == nullptr) {
331 ciEnv* env = CURRENT_ENV;
332 _flow = new (env->arena()) ciTypeFlow(env, this);
333 _flow->do_flow();
334 }
335 return _flow;
336 #else // COMPILER2
337 ShouldNotReachHere();
338 return nullptr;
339 #endif // COMPILER2
340 }
341
342
343 // ------------------------------------------------------------------
344 // ciMethod::get_osr_flow_analysis
345 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
346 #if defined(COMPILER2)
347 // OSR entry points are always place after a call bytecode of some sort
348 assert(osr_bci >= 0, "must supply valid OSR entry point");
349 ciEnv* env = CURRENT_ENV;
350 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
351 flow->do_flow();
352 return flow;
353 #else // COMPILER2
354 ShouldNotReachHere();
355 return nullptr;
356 #endif // COMPILER2
357 }
358
359 // ------------------------------------------------------------------
360 // ciMethod::raw_liveness_at_bci
361 //
362 // Which local variables are live at a specific bci?
363 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
364 check_is_loaded();
365 if (_liveness == nullptr) {
366 // Create the liveness analyzer.
367 Arena* arena = CURRENT_ENV->arena();
368 _liveness = new (arena) MethodLiveness(arena, this);
369 _liveness->compute_liveness();
370 }
371 return _liveness->get_liveness_at(bci);
372 }
373
374 // ------------------------------------------------------------------
375 // ciMethod::liveness_at_bci
376 //
377 // Which local variables are live at a specific bci? When debugging
378 // will return true for all locals in some cases to improve debug
379 // information.
380 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
381 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
382 // Keep all locals live for the user's edification and amusement.
383 MethodLivenessResult result(_max_locals);
384 result.set_range(0, _max_locals);
385 result.set_is_valid();
386 return result;
387 }
388 return raw_liveness_at_bci(bci);
389 }
390
391 // ciMethod::live_local_oops_at_bci
392 //
393 // find all the live oops in the locals array for a particular bci
394 // Compute what the interpreter believes by using the interpreter
395 // oopmap generator. This is used as a double check during osr to
396 // guard against conservative result from MethodLiveness making us
397 // think a dead oop is live. MethodLiveness is conservative in the
398 // sense that it may consider locals to be live which cannot be live,
399 // like in the case where a local could contain an oop or a primitive
400 // along different paths. In that case the local must be dead when
401 // those paths merge. Since the interpreter's viewpoint is used when
402 // gc'ing an interpreter frame we need to use its viewpoint during
403 // OSR when loading the locals.
404
405 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
406 VM_ENTRY_MARK;
407 InterpreterOopMap mask;
408 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
409 int mask_size = max_locals();
410 ResourceBitMap result(mask_size);
411 int i;
412 for (i = 0; i < mask_size ; i++ ) {
413 if (mask.is_oop(i)) result.set_bit(i);
414 }
415 return result;
416 }
417
418
419 #ifdef COMPILER1
420 // ------------------------------------------------------------------
421 // ciMethod::bci_block_start
422 //
423 // Marks all bcis where a new basic block starts
424 const BitMap& ciMethod::bci_block_start() {
425 check_is_loaded();
426 if (_liveness == nullptr) {
427 // Create the liveness analyzer.
428 Arena* arena = CURRENT_ENV->arena();
429 _liveness = new (arena) MethodLiveness(arena, this);
430 _liveness->compute_liveness();
431 }
432
433 return _liveness->get_bci_block_start();
434 }
435 #endif // COMPILER1
436
437
438 // ------------------------------------------------------------------
439 // ciMethod::check_overflow
440 //
441 // Check whether the profile counter is overflowed and adjust if true.
442 // For invoke* it will turn negative values into max_jint,
443 // and for checkcast/aastore/instanceof turn positive values into min_jint.
444 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
445 switch (code) {
446 case Bytecodes::_aastore: // fall-through
447 case Bytecodes::_checkcast: // fall-through
448 case Bytecodes::_instanceof: {
449 if (VM_Version::profile_all_receivers_at_type_check()) {
450 return (c < 0 ? max_jint : c); // always non-negative
451 }
452 return (c > 0 ? min_jint : c); // always non-positive
453 }
454 default: {
455 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
456 return (c < 0 ? max_jint : c); // always non-negative
457 }
458 }
459 }
460
461
462 // ------------------------------------------------------------------
463 // ciMethod::call_profile_at_bci
464 //
465 // Get the ciCallProfile for the invocation of this method.
466 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
467 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
468 ResourceMark rm;
469 ciCallProfile result;
470 if (method_data() != nullptr && method_data()->is_mature()) {
471 ciProfileData* data = method_data()->bci_to_data(bci);
472 if (data != nullptr && data->is_CounterData()) {
473 // Every profiled call site has a counter.
474 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
475
476 if (!data->is_ReceiverTypeData()) {
477 result._receiver_count[0] = 0; // that's a definite zero
478 } else { // ReceiverTypeData is a subclass of CounterData
479 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
480 // In addition, virtual call sites have receiver type information
481 int receivers_count_total = 0;
482 int morphism = 0;
483 // Precompute morphism for the possible fixup
484 for (uint i = 0; i < call->row_limit(); i++) {
485 ciKlass* receiver = call->receiver(i);
486 if (receiver == nullptr) continue;
487 morphism++;
488 }
489 int epsilon = 0;
490 // For a call, it is assumed that either the type of the receiver(s)
491 // is recorded or an associated counter is incremented, but not both. With
492 // tiered compilation, however, both can happen due to the interpreter and
493 // C1 profiling invocations differently. Address that inconsistency here.
494 if (morphism == 1 && count > 0) {
495 epsilon = count;
496 count = 0;
497 }
498 for (uint i = 0; i < call->row_limit(); i++) {
499 ciKlass* receiver = call->receiver(i);
500 if (receiver == nullptr) continue;
501 int rcount = saturated_add(call->receiver_count(i), epsilon);
502 if (rcount == 0) rcount = 1; // Should be valid value
503 receivers_count_total = saturated_add(receivers_count_total, rcount);
504 // Add the receiver to result data.
505 result.add_receiver(receiver, rcount);
506 // If we extend profiling to record methods,
507 // we will set result._method also.
508 }
509 // Determine call site's morphism.
510 // The call site count is 0 with known morphism (only 1 or 2 receivers)
511 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
512 // The call site count is > 0 in the case of a polymorphic virtual call.
513 if (morphism > 0 && morphism == result._limit) {
514 // The morphism <= MorphismLimit.
515 if ((morphism < ciCallProfile::MorphismLimit) ||
516 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
517 #ifdef ASSERT
518 if (count > 0) {
519 this->print_short_name(tty);
520 tty->print_cr(" @ bci:%d", bci);
521 this->print_codes();
522 assert(false, "this call site should not be polymorphic");
523 }
524 #endif
525 result._morphism = morphism;
526 }
527 }
528 // Make the count consistent if this is a call profile. If count is
529 // zero or less, presume that this is a typecheck profile and
530 // do nothing. Otherwise, increase count to be the sum of all
531 // receiver's counts.
532 if (count >= 0) {
533 count = saturated_add(count, receivers_count_total);
534 }
535 }
536 result._count = count;
537 }
538 }
539 return result;
540 }
541
542 // ------------------------------------------------------------------
543 // Add new receiver and sort data by receiver's profile count.
544 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
545 // Add new receiver and sort data by receiver's counts when we have space
546 // for it otherwise replace the less called receiver (less called receiver
547 // is placed to the last array element which is not used).
548 // First array's element contains most called receiver.
549 int i = _limit;
550 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
551 _receiver[i] = _receiver[i-1];
552 _receiver_count[i] = _receiver_count[i-1];
553 }
554 _receiver[i] = receiver;
555 _receiver_count[i] = receiver_count;
556 if (_limit < MorphismLimit) _limit++;
557 }
558
559
560 void ciMethod::assert_virtual_call_type_ok(int bci) {
561 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
562 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
563 }
564
565 void ciMethod::assert_call_type_ok(int bci) {
566 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
567 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
568 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
569 }
570
571 /**
572 * Check whether profiling provides a type for the argument i to the
573 * call at bci bci
574 *
575 * @param [in]bci bci of the call
576 * @param [in]i argument number
577 * @param [out]type profiled type of argument, null if none
578 * @param [out]ptr_kind whether always null, never null or maybe null
579 * @return true if profiling exists
580 *
581 */
582 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
583 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
584 ciProfileData* data = method_data()->bci_to_data(bci);
585 if (data != nullptr) {
586 if (data->is_VirtualCallTypeData()) {
587 assert_virtual_call_type_ok(bci);
588 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
589 if (i >= call->number_of_arguments()) {
590 return false;
591 }
592 type = call->valid_argument_type(i);
593 ptr_kind = call->argument_ptr_kind(i);
594 return true;
595 } else if (data->is_CallTypeData()) {
596 assert_call_type_ok(bci);
597 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
598 if (i >= call->number_of_arguments()) {
599 return false;
600 }
601 type = call->valid_argument_type(i);
602 ptr_kind = call->argument_ptr_kind(i);
603 return true;
604 }
605 }
606 }
607 return false;
608 }
609
610 /**
611 * Check whether profiling provides a type for the return value from
612 * the call at bci bci
613 *
614 * @param [in]bci bci of the call
615 * @param [out]type profiled type of argument, null if none
616 * @param [out]ptr_kind whether always null, never null or maybe null
617 * @return true if profiling exists
618 *
619 */
620 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
621 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) {
622 ciProfileData* data = method_data()->bci_to_data(bci);
623 if (data != nullptr) {
624 if (data->is_VirtualCallTypeData()) {
625 assert_virtual_call_type_ok(bci);
626 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
627 if (call->has_return()) {
628 type = call->valid_return_type();
629 ptr_kind = call->return_ptr_kind();
630 return true;
631 }
632 } else if (data->is_CallTypeData()) {
633 assert_call_type_ok(bci);
634 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
635 if (call->has_return()) {
636 type = call->valid_return_type();
637 ptr_kind = call->return_ptr_kind();
638 }
639 return true;
640 }
641 }
642 }
643 return false;
644 }
645
646 /**
647 * Check whether profiling provides a type for the parameter i
648 *
649 * @param [in]i parameter number
650 * @param [out]type profiled type of parameter, null if none
651 * @param [out]ptr_kind whether always null, never null or maybe null
652 * @return true if profiling exists
653 *
654 */
655 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
656 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
657 ciParametersTypeData* parameters = method_data()->parameters_type_data();
658 if (parameters != nullptr && i < parameters->number_of_parameters()) {
659 type = parameters->valid_parameter_type(i);
660 ptr_kind = parameters->parameter_ptr_kind(i);
661 return true;
662 }
663 }
664 return false;
665 }
666
667 // MDO updates are racy. C2 can observe the array type before the profiling code has updated the
668 // corresponding flat/null-free flags. If the array type is known, prefer the properties it provides.
669 static void update_flags_from_type(ciKlass* array_type, bool& flat_array, bool& null_free_array) {
670 if (array_type != nullptr) {
671 flat_array |= array_type->is_flat_array_klass();
672 null_free_array |= array_type->as_array_klass()->is_elem_null_free();
673 }
674 }
675
676 bool ciMethod::array_access_profiled_type(int bci, ciKlass*& array_type, ciKlass*& element_type, ProfilePtrKind& element_ptr, bool &flat_array, bool &null_free_array) {
677 if (method_data() != nullptr && method_data()->is_mature()) {
678 ciProfileData* data = method_data()->bci_to_data(bci);
679 if (data != nullptr) {
680 if (data->is_ArrayLoadData()) {
681 ciArrayLoadData* array_access = (ciArrayLoadData*) data->as_ArrayLoadData();
682 array_type = array_access->array()->valid_type();
683 element_type = array_access->element()->valid_type();
684 element_ptr = array_access->element()->ptr_kind();
685 flat_array = array_access->flat_array();
686 null_free_array = array_access->null_free_array();
687 update_flags_from_type(array_type, flat_array, null_free_array);
688 return true;
689 } else if (data->is_ArrayStoreData()) {
690 ciArrayStoreData* array_access = (ciArrayStoreData*) data->as_ArrayStoreData();
691 array_type = array_access->array()->valid_type();
692 flat_array = array_access->flat_array();
693 null_free_array = array_access->null_free_array();
694 update_flags_from_type(array_type, flat_array, null_free_array);
695 ciCallProfile call_profile = call_profile_at_bci(bci);
696 if (call_profile.morphism() == 1) {
697 element_type = call_profile.receiver(0);
698 } else {
699 element_type = nullptr;
700 }
701 if (!array_access->null_seen()) {
702 element_ptr = ProfileNeverNull;
703 } else if (call_profile.count() == 0) {
704 element_ptr = ProfileAlwaysNull;
705 } else {
706 element_ptr = ProfileMaybeNull;
707 }
708 return true;
709 }
710 }
711 }
712 return false;
713 }
714
715 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) {
716 if (method_data() != nullptr && method_data()->is_mature()) {
717 ciProfileData* data = method_data()->bci_to_data(bci);
718 if (data != nullptr && data->is_ACmpData()) {
719 ciACmpData* acmp = (ciACmpData*)data->as_ACmpData();
720 left_type = acmp->left()->valid_type();
721 right_type = acmp->right()->valid_type();
722 left_ptr = acmp->left()->ptr_kind();
723 right_ptr = acmp->right()->ptr_kind();
724 left_inline_type = acmp->left_inline_type();
725 right_inline_type = acmp->right_inline_type();
726 return true;
727 }
728 }
729 return false;
730 }
731
732
733 // ------------------------------------------------------------------
734 // ciMethod::find_monomorphic_target
735 //
736 // Given a certain calling environment, find the monomorphic target
737 // for the call. Return null if the call is not monomorphic in
738 // its calling environment, or if there are only abstract methods.
739 // The returned method is never abstract.
740 // Note: If caller uses a non-null result, it must inform dependencies
741 // via assert_unique_concrete_method or assert_leaf_type.
742 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
743 ciInstanceKlass* callee_holder,
744 ciInstanceKlass* actual_recv,
745 bool check_access) {
746 check_is_loaded();
747
748 if (actual_recv->is_interface()) {
749 // %%% We cannot trust interface types, yet. See bug 6312651.
750 return nullptr;
751 }
752
753 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
754 if (root_m == nullptr) {
755 // Something went wrong looking up the actual receiver method.
756 return nullptr;
757 }
758
759 // Make certain quick checks even if UseCHA is false.
760
761 // Is it private or final?
762 if (root_m->can_be_statically_bound()) {
763 assert(!root_m->is_abstract(), "sanity");
764 return root_m;
765 }
766
767 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
768 // Easy case. There is no other place to put a method, so don't bother
769 // to go through the VM_ENTRY_MARK and all the rest.
770 if (root_m->is_abstract()) {
771 return nullptr;
772 }
773 return root_m;
774 }
775
776 // Array methods (clone, hashCode, etc.) are always statically bound.
777 // If we were to see an array type here, we'd return root_m.
778 // However, this method processes only ciInstanceKlasses. (See 4962591.)
779 // The inline_native_clone intrinsic narrows Object to T[] properly,
780 // so there is no need to do the same job here.
781
782 if (!UseCHA) return nullptr;
783
784 VM_ENTRY_MARK;
785
786 methodHandle target;
787 {
788 MutexLocker locker(Compile_lock);
789 InstanceKlass* context = actual_recv->get_instanceKlass();
790 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
791 root_m->get_Method(),
792 callee_holder->get_Klass(),
793 this->get_Method()));
794 assert(target() == nullptr || !target()->is_abstract(), "not allowed");
795 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
796 }
797
798 #ifndef PRODUCT
799 LogTarget(Debug, dependencies) lt;
800 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) {
801 LogStream ls(<);
802 ls.print("found a non-root unique target method");
803 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name());
804 ls.print(" method = ");
805 target->print_short_name(&ls);
806 ls.cr();
807 }
808 #endif //PRODUCT
809
810 if (target() == nullptr) {
811 return nullptr;
812 }
813
814 // Redefinition support.
815 if (this->is_old() || root_m->is_old() || target->is_old()) {
816 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
817 return nullptr;
818 }
819
820 if (target() == root_m->get_Method()) {
821 return root_m;
822 }
823 if (!root_m->is_public() &&
824 !root_m->is_protected()) {
825 // If we are going to reason about inheritance, it's easiest
826 // if the method in question is public, protected, or private.
827 // If the answer is not root_m, it is conservatively correct
828 // to return null, even if the CHA encountered irrelevant
829 // methods in other packages.
830 // %%% TO DO: Work out logic for package-private methods
831 // with the same name but different vtable indexes.
832 return nullptr;
833 }
834 return CURRENT_THREAD_ENV->get_method(target());
835 }
836
837 // ------------------------------------------------------------------
838 // ciMethod::can_be_statically_bound
839 //
840 // Tries to determine whether a method can be statically bound in some context.
841 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
842 return (holder() == context) && can_be_statically_bound();
843 }
844
845 // ------------------------------------------------------------------
846 // ciMethod::can_omit_stack_trace
847 //
848 // Tries to determine whether a method can omit stack trace in throw in compiled code.
849 bool ciMethod::can_omit_stack_trace() const {
850 if (!StackTraceInThrowable) {
851 return true; // stack trace is switched off.
852 }
853 if (!OmitStackTraceInFastThrow) {
854 return false; // Have to provide stack trace.
855 }
856 return _can_omit_stack_trace;
857 }
858
859 // ------------------------------------------------------------------
860 // ciMethod::resolve_invoke
861 //
862 // Given a known receiver klass, find the target for the call.
863 // Return null if the call has no target or the target is abstract.
864 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
865 check_is_loaded();
866 VM_ENTRY_MARK;
867
868 Klass* caller_klass = caller->get_Klass();
869 Klass* recv = exact_receiver->get_Klass();
870 Klass* resolved = holder()->get_Klass();
871 Symbol* h_name = name()->get_symbol();
872 Symbol* h_signature = signature()->get_symbol();
873
874 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
875 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
876 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
877 Method* m = nullptr;
878 // Only do exact lookup if receiver klass has been linked. Otherwise,
879 // the vtable has not been setup, and the LinkResolver will fail.
880 if (recv->is_array_klass()
881 ||
882 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
883 if (holder()->is_interface()) {
884 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
885 } else {
886 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
887 }
888 }
889
890 if (m == nullptr) {
891 // Return null only if there was a problem with lookup (uninitialized class, etc.)
892 return nullptr;
893 }
894
895 ciMethod* result = this;
896 if (m != get_Method()) {
897 // Redefinition support.
898 if (this->is_old() || m->is_old()) {
899 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
900 return nullptr;
901 }
902
903 result = CURRENT_THREAD_ENV->get_method(m);
904 }
905
906 if (result->is_abstract() && !allow_abstract) {
907 // Don't return abstract methods because they aren't optimizable or interesting.
908 return nullptr;
909 }
910 return result;
911 }
912
913 // ------------------------------------------------------------------
914 // ciMethod::resolve_vtable_index
915 //
916 // Given a known receiver klass, find the vtable index for the call.
917 // Return Method::invalid_vtable_index if the vtable_index is unknown.
918 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
919 check_is_loaded();
920
921 int vtable_index = Method::invalid_vtable_index;
922 // Only do lookup if receiver klass has been linked. Otherwise,
923 // the vtable has not been setup, and the LinkResolver will fail.
924 if (!receiver->is_interface()
925 && (!receiver->is_instance_klass() ||
926 receiver->as_instance_klass()->is_linked())) {
927 VM_ENTRY_MARK;
928
929 Klass* caller_klass = caller->get_Klass();
930 Klass* recv = receiver->get_Klass();
931 Symbol* h_name = name()->get_symbol();
932 Symbol* h_signature = signature()->get_symbol();
933
934 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
935 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
936 if (vtable_index == Method::nonvirtual_vtable_index) {
937 // A statically bound method. Return "no such index".
938 vtable_index = Method::invalid_vtable_index;
939 }
940 }
941
942 return vtable_index;
943 }
944
945 // ------------------------------------------------------------------
946 // ciMethod::get_field_at_bci
947 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
948 ciBytecodeStream iter(this);
949 iter.reset_to_bci(bci);
950 iter.next();
951 return iter.get_field(will_link);
952 }
953
954 // ------------------------------------------------------------------
955 // ciMethod::get_method_at_bci
956 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
957 ciBytecodeStream iter(this);
958 iter.reset_to_bci(bci);
959 iter.next();
960 return iter.get_method(will_link, declared_signature);
961 }
962
963 // ------------------------------------------------------------------
964 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
965 ciBytecodeStream iter(this);
966 iter.reset_to_bci(bci);
967 iter.next();
968 return iter.get_declared_method_holder();
969 }
970
971 // ------------------------------------------------------------------
972 // Adjust a CounterData count to be commensurate with
973 // interpreter_invocation_count. If the MDO exists for
974 // only 25% of the time the method exists, then the
975 // counts in the MDO should be scaled by 4X, so that
976 // they can be usefully and stably compared against the
977 // invocation counts in methods.
978 int ciMethod::scale_count(int count, float prof_factor) {
979 if (count > 0 && method_data() != nullptr) {
980 int counter_life = method_data()->invocation_count();
981 int method_life = interpreter_invocation_count();
982 if (method_life < counter_life) { // may happen because of the snapshot timing
983 method_life = counter_life;
984 }
985 if (counter_life > 0) {
986 double count_d = (double)count * prof_factor * method_life / counter_life + 0.5;
987 if (count_d >= static_cast<double>(INT_MAX)) {
988 // Clamp in case of overflowing int range.
989 count = INT_MAX;
990 } else {
991 count = int(count_d);
992 count = (count > 0) ? count : 1;
993 }
994 } else {
995 count = 1;
996 }
997 }
998 return count;
999 }
1000
1001
1002 // ------------------------------------------------------------------
1003 // ciMethod::is_special_get_caller_class_method
1004 //
1005 bool ciMethod::is_ignored_by_security_stack_walk() const {
1006 check_is_loaded();
1007 VM_ENTRY_MARK;
1008 return get_Method()->is_ignored_by_security_stack_walk();
1009 }
1010
1011 // ------------------------------------------------------------------
1012 // ciMethod::needs_clinit_barrier
1013 //
1014 bool ciMethod::needs_clinit_barrier() const {
1015 check_is_loaded();
1016 return is_static() && !holder()->is_initialized();
1017 }
1018
1019 // ------------------------------------------------------------------
1020 // invokedynamic support
1021
1022 // ------------------------------------------------------------------
1023 // ciMethod::is_method_handle_intrinsic
1024 //
1025 // Return true if the method is an instance of the JVM-generated
1026 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
1027 bool ciMethod::is_method_handle_intrinsic() const {
1028 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1029 return (MethodHandles::is_signature_polymorphic(iid) &&
1030 MethodHandles::is_signature_polymorphic_intrinsic(iid));
1031 }
1032
1033 // ------------------------------------------------------------------
1034 // ciMethod::is_compiled_lambda_form
1035 //
1036 // Return true if the method is a generated MethodHandle adapter.
1037 // These are built by Java code.
1038 bool ciMethod::is_compiled_lambda_form() const {
1039 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1040 return iid == vmIntrinsics::_compiledLambdaForm;
1041 }
1042
1043 // ------------------------------------------------------------------
1044 // ciMethod::is_object_constructor
1045 //
1046 bool ciMethod::is_object_constructor() const {
1047 return (name() == ciSymbols::object_initializer_name()
1048 && signature()->return_type()->is_void());
1049 // Note: We can't test is_static, because that would
1050 // require the method to be loaded. Sometimes it isn't.
1051 }
1052
1053 // ------------------------------------------------------------------
1054 // ciMethod::is_scoped
1055 //
1056 // Return true for methods annotated with @Scoped
1057 bool ciMethod::is_scoped() const {
1058 return get_Method()->is_scoped();
1059 }
1060
1061 // ------------------------------------------------------------------
1062 // ciMethod::has_member_arg
1063 //
1064 // Return true if the method is a linker intrinsic like _linkToVirtual.
1065 // These are built by the JVM.
1066 bool ciMethod::has_member_arg() const {
1067 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1068 return (MethodHandles::is_signature_polymorphic(iid) &&
1069 MethodHandles::has_member_arg(iid));
1070 }
1071
1072 // ------------------------------------------------------------------
1073 // ciMethod::ensure_method_data
1074 //
1075 // Generate new MethodData* objects at compile time.
1076 // Return true if allocation was successful or no MDO is required.
1077 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1078 EXCEPTION_CONTEXT;
1079 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1080 return true;
1081 }
1082 if (h_m()->method_data() == nullptr) {
1083 Method::build_profiling_method_data(h_m, THREAD);
1084 if (HAS_PENDING_EXCEPTION) {
1085 CLEAR_PENDING_EXCEPTION;
1086 }
1087 }
1088 if (h_m()->method_data() != nullptr) {
1089 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1090 return _method_data->load_data();
1091 } else {
1092 _method_data = CURRENT_ENV->get_empty_methodData();
1093 return false;
1094 }
1095 }
1096
1097 // public, retroactive version
1098 bool ciMethod::ensure_method_data() {
1099 bool result = true;
1100 if (_method_data == nullptr || _method_data->is_empty()) {
1101 GUARDED_VM_ENTRY({
1102 methodHandle mh(Thread::current(), get_Method());
1103 result = ensure_method_data(mh);
1104 });
1105 }
1106 return result;
1107 }
1108
1109
1110 // ------------------------------------------------------------------
1111 // ciMethod::method_data
1112 //
1113 ciMethodData* ciMethod::method_data() {
1114 if (_method_data != nullptr) {
1115 return _method_data;
1116 }
1117 VM_ENTRY_MARK;
1118 ciEnv* env = CURRENT_ENV;
1119 Thread* my_thread = JavaThread::current();
1120 methodHandle h_m(my_thread, get_Method());
1121
1122 if (h_m()->method_data() != nullptr) {
1123 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1124 _method_data->load_data();
1125 } else {
1126 _method_data = CURRENT_ENV->get_empty_methodData();
1127 }
1128 return _method_data;
1129
1130 }
1131
1132 // ------------------------------------------------------------------
1133 // ciMethod::method_data_or_null
1134 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1135 // null otherwise.
1136 ciMethodData* ciMethod::method_data_or_null() {
1137 ciMethodData *md = method_data();
1138 if (md->is_empty()) {
1139 return nullptr;
1140 }
1141 return md;
1142 }
1143
1144 // ------------------------------------------------------------------
1145 // ciMethod::ensure_method_counters
1146 //
1147 MethodCounters* ciMethod::ensure_method_counters() {
1148 check_is_loaded();
1149 VM_ENTRY_MARK;
1150 methodHandle mh(THREAD, get_Method());
1151 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1152 return method_counters;
1153 }
1154
1155 // ------------------------------------------------------------------
1156 // ciMethod::has_option
1157 //
1158 bool ciMethod::has_option(CompileCommandEnum option) {
1159 check_is_loaded();
1160 VM_ENTRY_MARK;
1161 methodHandle mh(THREAD, get_Method());
1162 return CompilerOracle::has_option(mh, option);
1163 }
1164
1165 // ------------------------------------------------------------------
1166 // ciMethod::has_option_value
1167 //
1168 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1169 check_is_loaded();
1170 VM_ENTRY_MARK;
1171 methodHandle mh(THREAD, get_Method());
1172 return CompilerOracle::has_option_value(mh, option, value);
1173 }
1174 // ------------------------------------------------------------------
1175 // ciMethod::can_be_compiled
1176 //
1177 // Have previous compilations of this method succeeded?
1178 bool ciMethod::can_be_compiled() {
1179 check_is_loaded();
1180 ciEnv* env = CURRENT_ENV;
1181 if (is_c1_compile(env->comp_level())) {
1182 return _is_c1_compilable;
1183 }
1184 return _is_c2_compilable;
1185 }
1186
1187 // ------------------------------------------------------------------
1188 // ciMethod::has_compiled_code
1189 bool ciMethod::has_compiled_code() {
1190 return inline_instructions_size() > 0;
1191 }
1192
1193 int ciMethod::highest_osr_comp_level() {
1194 check_is_loaded();
1195 VM_ENTRY_MARK;
1196 return get_Method()->highest_osr_comp_level();
1197 }
1198
1199 // ------------------------------------------------------------------
1200 // ciMethod::code_size_for_inlining
1201 //
1202 // Code size for inlining decisions. This method returns a code
1203 // size of 1 for methods which has the ForceInline annotation.
1204 int ciMethod::code_size_for_inlining() {
1205 check_is_loaded();
1206 if (get_Method()->force_inline()) {
1207 return 1;
1208 }
1209 return code_size();
1210 }
1211
1212 // ------------------------------------------------------------------
1213 // ciMethod::inline_instructions_size
1214 //
1215 // This is a rough metric for "fat" methods, compared before inlining
1216 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1217 // junk like exception handler, stubs, and constant table, which are
1218 // not highly relevant to an inlined method. So we use the more
1219 // specific accessor nmethod::insts_size.
1220 // Also some instructions inside the code are excluded from inline
1221 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter)
1222 int ciMethod::inline_instructions_size() {
1223 if (_inline_instructions_size == -1) {
1224 if (TrainingData::have_data()) {
1225 GUARDED_VM_ENTRY(
1226 CompLevel level = static_cast<CompLevel>(CURRENT_ENV->comp_level());
1227 methodHandle top_level_mh(Thread::current(), CURRENT_ENV->task()->method());
1228 MethodTrainingData* mtd = MethodTrainingData::find(top_level_mh);
1229 if (mtd != nullptr) {
1230 CompileTrainingData* ctd = mtd->last_toplevel_compile(level);
1231 if (ctd != nullptr) {
1232 methodHandle mh(Thread::current(), get_Method());
1233 MethodTrainingData* this_mtd = MethodTrainingData::find(mh);
1234 if (this_mtd != nullptr) {
1235 auto r = ctd->ci_records().ciMethod__inline_instructions_size.find(this_mtd);
1236 if (r.is_valid()) {
1237 _inline_instructions_size = r.result();
1238 }
1239 }
1240 }
1241 }
1242 );
1243 }
1244 }
1245 if (_inline_instructions_size == -1) {
1246 GUARDED_VM_ENTRY(
1247 nmethod* code = get_Method()->code();
1248 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1249 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size();
1250 _inline_instructions_size = isize > 0 ? isize : 0;
1251 } else {
1252 _inline_instructions_size = 0;
1253 }
1254 if (TrainingData::need_data()) {
1255 CompileTrainingData* ctd = CURRENT_ENV->task()->training_data();
1256 if (ctd != nullptr) {
1257 methodHandle mh(Thread::current(), get_Method());
1258 MethodTrainingData* this_mtd = MethodTrainingData::make(mh);
1259 ctd->ci_records().ciMethod__inline_instructions_size.append_if_missing(_inline_instructions_size, this_mtd);
1260 }
1261 }
1262 );
1263 }
1264 return _inline_instructions_size;
1265 }
1266
1267 // ------------------------------------------------------------------
1268 // ciMethod::log_nmethod_identity
1269 void ciMethod::log_nmethod_identity(xmlStream* log) {
1270 GUARDED_VM_ENTRY(
1271 nmethod* code = get_Method()->code();
1272 if (code != nullptr) {
1273 code->log_identity(log);
1274 }
1275 )
1276 }
1277
1278 // ------------------------------------------------------------------
1279 // ciMethod::is_not_reached
1280 bool ciMethod::is_not_reached(int bci) {
1281 check_is_loaded();
1282 VM_ENTRY_MARK;
1283 return Interpreter::is_not_reached(
1284 methodHandle(THREAD, get_Method()), bci);
1285 }
1286
1287 // ------------------------------------------------------------------
1288 // ciMethod::was_never_executed
1289 bool ciMethod::was_executed_more_than(int times) {
1290 VM_ENTRY_MARK;
1291 return get_Method()->was_executed_more_than(times);
1292 }
1293
1294 // ------------------------------------------------------------------
1295 // ciMethod::has_unloaded_classes_in_signature
1296 bool ciMethod::has_unloaded_classes_in_signature() {
1297 // ciSignature is resolved against some accessing class and
1298 // signature classes aren't required to be local. As a benefit,
1299 // it makes signature classes visible through loader constraints.
1300 // So, encountering an unloaded class signals it is absent both in
1301 // the callee (local) and caller contexts.
1302 return signature()->has_unloaded_classes();
1303 }
1304
1305 // ------------------------------------------------------------------
1306 // ciMethod::is_klass_loaded
1307 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1308 VM_ENTRY_MARK;
1309 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
1310 }
1311
1312 // ------------------------------------------------------------------
1313 // ciMethod::check_call
1314 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1315 // This method is used only in C2 from InlineTree::ok_to_inline,
1316 // and is only used under -Xcomp.
1317 // It appears to fail when applied to an invokeinterface call site.
1318 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1319 VM_ENTRY_MARK;
1320 {
1321 ExceptionMark em(THREAD);
1322 HandleMark hm(THREAD);
1323 constantPoolHandle pool (THREAD, get_Method()->constants());
1324 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1325 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1326 if (HAS_PENDING_EXCEPTION) {
1327 CLEAR_PENDING_EXCEPTION;
1328 return false;
1329 } else {
1330 return (spec_method->is_static() == is_static);
1331 }
1332 }
1333 return false;
1334 }
1335 // ------------------------------------------------------------------
1336 // ciMethod::print_codes
1337 //
1338 // Print the bytecodes for this method.
1339 void ciMethod::print_codes_on(outputStream* st) {
1340 check_is_loaded();
1341 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1342 }
1343
1344
1345 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1346 check_is_loaded(); \
1347 VM_ENTRY_MARK; \
1348 return get_Method()->flag_accessor(); \
1349 }
1350
1351 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1352 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1353 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1354 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1355 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1356 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1357
1358 bool ciMethod::is_boxing_method() const {
1359 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1360 switch (intrinsic_id()) {
1361 case vmIntrinsics::_Boolean_valueOf:
1362 case vmIntrinsics::_Byte_valueOf:
1363 case vmIntrinsics::_Character_valueOf:
1364 case vmIntrinsics::_Short_valueOf:
1365 case vmIntrinsics::_Integer_valueOf:
1366 case vmIntrinsics::_Long_valueOf:
1367 case vmIntrinsics::_Float_valueOf:
1368 case vmIntrinsics::_Double_valueOf:
1369 return true;
1370 default:
1371 return false;
1372 }
1373 }
1374 return false;
1375 }
1376
1377 bool ciMethod::is_unboxing_method() const {
1378 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1379 switch (intrinsic_id()) {
1380 case vmIntrinsics::_booleanValue:
1381 case vmIntrinsics::_byteValue:
1382 case vmIntrinsics::_charValue:
1383 case vmIntrinsics::_shortValue:
1384 case vmIntrinsics::_intValue:
1385 case vmIntrinsics::_longValue:
1386 case vmIntrinsics::_floatValue:
1387 case vmIntrinsics::_doubleValue:
1388 return true;
1389 default:
1390 return false;
1391 }
1392 }
1393 return false;
1394 }
1395
1396 bool ciMethod::is_vector_method() const {
1397 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1398 (intrinsic_id() != vmIntrinsics::_none);
1399 }
1400
1401 BCEscapeAnalyzer *ciMethod::get_bcea() {
1402 #ifdef COMPILER2
1403 if (_bcea == nullptr) {
1404 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr);
1405 }
1406 return _bcea;
1407 #else // COMPILER2
1408 ShouldNotReachHere();
1409 return nullptr;
1410 #endif // COMPILER2
1411 }
1412
1413 ciMethodBlocks *ciMethod::get_method_blocks() {
1414 if (_method_blocks == nullptr) {
1415 Arena *arena = CURRENT_ENV->arena();
1416 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1417 }
1418 return _method_blocks;
1419 }
1420
1421 #undef FETCH_FLAG_FROM_VM
1422
1423 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1424 st->print("%s %s %s",
1425 CURRENT_ENV->replay_name(method->method_holder()),
1426 method->name()->as_quoted_ascii(),
1427 method->signature()->as_quoted_ascii());
1428 }
1429
1430 void ciMethod::dump_name_as_ascii(outputStream* st) {
1431 Method* method = get_Method();
1432 dump_name_as_ascii(st, method);
1433 }
1434
1435 void ciMethod::dump_replay_data(outputStream* st) {
1436 ResourceMark rm;
1437 Method* method = get_Method();
1438 if (MethodHandles::is_signature_polymorphic_method(method)) {
1439 // ignore for now
1440 return;
1441 }
1442 MethodCounters* mcs = method->method_counters();
1443 st->print("ciMethod ");
1444 dump_name_as_ascii(st);
1445 st->print_cr(" %d %d %d %d %d",
1446 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(),
1447 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(),
1448 interpreter_invocation_count(),
1449 interpreter_throwout_count(),
1450 _inline_instructions_size);
1451 }
1452
1453 // ------------------------------------------------------------------
1454 // ciMethod::print_codes
1455 //
1456 // Print a range of the bytecodes for this method.
1457 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1458 check_is_loaded();
1459 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1460 }
1461
1462 // ------------------------------------------------------------------
1463 // ciMethod::print_name
1464 //
1465 // Print the name of this method, including signature and some flags.
1466 void ciMethod::print_name(outputStream* st) {
1467 check_is_loaded();
1468 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1469 }
1470
1471 // ------------------------------------------------------------------
1472 // ciMethod::print_short_name
1473 //
1474 // Print the name of this method, without signature.
1475 void ciMethod::print_short_name(outputStream* st) {
1476 if (is_loaded()) {
1477 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1478 } else {
1479 // Fall back if method is not loaded.
1480 holder()->print_name_on(st);
1481 st->print("::");
1482 name()->print_symbol_on(st);
1483 if (WizardMode)
1484 signature()->as_symbol()->print_symbol_on(st);
1485 }
1486 }
1487
1488 // ------------------------------------------------------------------
1489 // ciMethod::print_impl
1490 //
1491 // Implementation of the print method.
1492 void ciMethod::print_impl(outputStream* st) {
1493 ciMetadata::print_impl(st);
1494 st->print(" name=");
1495 name()->print_symbol_on(st);
1496 st->print(" holder=");
1497 holder()->print_name_on(st);
1498 st->print(" signature=");
1499 signature()->as_symbol()->print_symbol_on(st);
1500 if (is_loaded()) {
1501 st->print(" loaded=true");
1502 st->print(" arg_size=%d", arg_size());
1503 st->print(" flags=");
1504 flags().print_member_flags(st);
1505 } else {
1506 st->print(" loaded=false");
1507 }
1508 }
1509
1510 // ------------------------------------------------------------------
1511
1512 static BasicType erase_to_word_type(BasicType bt) {
1513 if (is_subword_type(bt)) return T_INT;
1514 if (is_reference_type(bt)) return T_OBJECT;
1515 return bt;
1516 }
1517
1518 static bool basic_types_match(ciType* t1, ciType* t2) {
1519 if (t1 == t2) return true;
1520 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1521 }
1522
1523 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1524 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1525 !resolved_method->is_method_handle_intrinsic();
1526
1527 if (!invoke_through_mh_intrinsic) {
1528 // Method name & descriptor should stay the same.
1529 // Signatures may reference unloaded types and thus they may be not strictly equal.
1530 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1531 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1532
1533 return (declared_method->name()->equals(resolved_method->name())) &&
1534 (declared_signature->equals(resolved_signature));
1535 }
1536
1537 ciMethod* linker = declared_method;
1538 ciMethod* target = resolved_method;
1539 // Linkers have appendix argument which is not passed to callee.
1540 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1541 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1542 return false; // argument slot count mismatch
1543 }
1544
1545 ciSignature* linker_sig = linker->signature();
1546 ciSignature* target_sig = target->signature();
1547
1548 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1549 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1550 return false; // argument count mismatch
1551 }
1552
1553 int sbase = 0, rbase = 0;
1554 switch (linker->intrinsic_id()) {
1555 case vmIntrinsics::_linkToVirtual:
1556 case vmIntrinsics::_linkToInterface:
1557 case vmIntrinsics::_linkToSpecial: {
1558 if (target->is_static()) {
1559 return false;
1560 }
1561 if (linker_sig->type_at(0)->is_primitive_type()) {
1562 return false; // receiver should be an oop
1563 }
1564 sbase = 1; // skip receiver
1565 break;
1566 }
1567 case vmIntrinsics::_linkToStatic: {
1568 if (!target->is_static()) {
1569 return false;
1570 }
1571 break;
1572 }
1573 case vmIntrinsics::_invokeBasic: {
1574 if (target->is_static()) {
1575 if (target_sig->type_at(0)->is_primitive_type()) {
1576 return false; // receiver should be an oop
1577 }
1578 rbase = 1; // skip receiver
1579 }
1580 break;
1581 }
1582 default:
1583 break;
1584 }
1585 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1586 int arg_count = target_sig->count() - rbase;
1587 for (int i = 0; i < arg_count; i++) {
1588 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1589 return false;
1590 }
1591 }
1592 // Only check the return type if the symbolic info has non-void return type.
1593 // I.e. the return value of the resolved method can be dropped.
1594 if (!linker->return_type()->is_void() &&
1595 !basic_types_match(linker->return_type(), target->return_type())) {
1596 return false;
1597 }
1598 return true; // no mismatch found
1599 }
1600
1601 // ------------------------------------------------------------------
1602
1603 bool ciMethod::is_scalarized_arg(int idx) const {
1604 VM_ENTRY_MARK;
1605 return get_Method()->is_scalarized_arg(idx);
1606 }
1607
1608 bool ciMethod::is_scalarized_buffer_arg(int idx) const {
1609 VM_ENTRY_MARK;
1610 return get_Method()->is_scalarized_buffer_arg(idx);
1611 }
1612
1613 bool ciMethod::has_scalarized_args() const {
1614 GUARDED_VM_ENTRY(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 bool ciMethod::mismatch() const {
1626 VM_ENTRY_MARK;
1627 return get_Method()->mismatch();
1628 }
1629
1630 bool ciMethod::c1_needs_stack_repair() const {
1631 GUARDED_VM_ENTRY(return get_Method()->c1_needs_stack_repair();)
1632 }
1633
1634 bool ciMethod::c2_needs_stack_repair() const {
1635 GUARDED_VM_ENTRY(return get_Method()->c2_needs_stack_repair();)
1636 }
1637
1638 // ciMethod::is_old
1639 //
1640 // Return true for redefined methods
1641 bool ciMethod::is_old() const {
1642 ASSERT_IN_VM;
1643 return get_Method()->is_old();
1644 }
1645
1646 // A larval object can be passed into a constructor, or it can be passed into
1647 // MethodHandle::linkToSpecial, which, in turn, will pass it into a constructor
1648 bool ciMethod::receiver_maybe_larval() const {
1649 bool res = is_object_constructor() || intrinsic_id() == vmIntrinsics::_linkToSpecial;
1650 assert(!res || !is_scalarized_arg(0), "larval argument must not be passed as fields");
1651 return res;
1652 }
1653
1654 // Normally, a larval object cannot be returned. However, Unsafe::allocateInstance and
1655 // DirectMethodHandle::allocateInstance return an uninitialized larval object, this is required for
1656 // the construction of an object using the reflection API.
1657 bool ciMethod::return_value_is_larval() const {
1658 if (intrinsic_id() == vmIntrinsics::_allocateInstance) {
1659 return true;
1660 }
1661 if (holder()->name()->equals(ciSymbols::java_lang_invoke_DirectMethodHandle()) && name()->equals(ciSymbols::allocateInstance_name())) {
1662 return true;
1663 }
1664 return false;
1665 }