1 /*
2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciCallProfile.hpp"
27 #include "ci/ciExceptionHandler.hpp"
28 #include "ci/ciInstanceKlass.hpp"
29 #include "ci/ciMethod.hpp"
30 #include "ci/ciMethodBlocks.hpp"
31 #include "ci/ciMethodData.hpp"
32 #include "ci/ciStreams.hpp"
33 #include "ci/ciSymbol.hpp"
34 #include "ci/ciReplay.hpp"
35 #include "ci/ciSymbols.hpp"
36 #include "ci/ciUtilities.inline.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/compilerDefinitions.inline.hpp"
39 #include "compiler/compilerOracle.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 "prims/methodHandles.hpp"
52 #include "runtime/deoptimization.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "utilities/bitMap.inline.hpp"
55 #include "utilities/xmlstream.hpp"
56 #ifdef COMPILER2
57 #include "ci/bcEscapeAnalyzer.hpp"
58 #include "ci/ciTypeFlow.hpp"
59 #include "oops/method.hpp"
60 #endif
61
62 // ciMethod
63 //
64 // This class represents a Method* in the HotSpot virtual
65 // machine.
66
67
68 // ------------------------------------------------------------------
69 // ciMethod::ciMethod
70 //
71 // Loaded method.
72 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
73 ciMetadata(h_m()),
74 _holder(holder)
75 {
76 assert(h_m() != nullptr, "no null method");
77 assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
78
79 // These fields are always filled in in loaded methods.
80 _flags = ciFlags(h_m->access_flags());
81
82 // Easy to compute, so fill them in now.
83 _max_stack = h_m->max_stack();
84 _max_locals = h_m->max_locals();
85 _code_size = h_m->code_size();
86 _handler_count = h_m->exception_table_length();
87 _size_of_parameters = h_m->size_of_parameters();
88 _uses_monitors = h_m->has_monitor_bytecodes();
89 _balanced_monitors = !_uses_monitors || h_m->guaranteed_monitor_matching();
90 _is_c1_compilable = !h_m->is_not_c1_compilable();
91 _is_c2_compilable = !h_m->is_not_c2_compilable();
92 _can_be_parsed = true;
93 _has_reserved_stack_access = h_m->has_reserved_stack_access();
94 _is_overpass = h_m->is_overpass();
95 // Lazy fields, filled in on demand. Require allocation.
96 _code = nullptr;
97 _exception_handlers = nullptr;
98 _liveness = nullptr;
99 _method_blocks = nullptr;
100 #if defined(COMPILER2)
101 _flow = nullptr;
102 _bcea = nullptr;
103 #endif // COMPILER2
104
105 // Check for blackhole intrinsic and then populate the intrinsic ID.
106 CompilerOracle::tag_blackhole_if_possible(h_m);
107 _intrinsic_id = h_m->intrinsic_id();
108
109 ciEnv *env = CURRENT_ENV;
110 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
111 // 6328518 check hotswap conditions under the right lock.
112 bool should_take_Compile_lock = !Compile_lock->owned_by_self();
113 ConditionalMutexLocker locker(Compile_lock, should_take_Compile_lock, Mutex::_safepoint_check_flag);
114 if (Dependencies::check_evol_method(h_m()) != nullptr) {
115 _is_c1_compilable = false;
116 _is_c2_compilable = false;
117 _can_be_parsed = false;
118 }
119 } else {
120 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
121 }
122
123 if (h_m->method_holder()->is_linked()) {
124 _can_be_statically_bound = h_m->can_be_statically_bound();
125 _can_omit_stack_trace = h_m->can_omit_stack_trace();
126 } else {
127 // Have to use a conservative value in this case.
128 _can_be_statically_bound = false;
129 _can_omit_stack_trace = true;
130 }
131
132 // Adjust the definition of this condition to be more useful:
133 // %%% take these conditions into account in vtable generation
134 if (!_can_be_statically_bound && h_m->is_private())
135 _can_be_statically_bound = true;
136 if (_can_be_statically_bound && h_m->is_abstract())
137 _can_be_statically_bound = false;
138
139 // generating _signature may allow GC and therefore move m.
140 // These fields are always filled in.
141 _name = env->get_symbol(h_m->name());
142 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
143 constantPoolHandle cpool(Thread::current(), h_m->constants());
144 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
145 _method_data = nullptr;
146 // Take a snapshot of these values, so they will be commensurate with the MDO.
147 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
148 int invcnt = h_m->interpreter_invocation_count();
149 // if the value overflowed report it as max int
150 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
151 _interpreter_throwout_count = h_m->interpreter_throwout_count();
152 } else {
153 _interpreter_invocation_count = 0;
154 _interpreter_throwout_count = 0;
155 }
156 if (_interpreter_invocation_count == 0)
157 _interpreter_invocation_count = 1;
158 _inline_instructions_size = -1;
159 if (ReplayCompiles) {
160 ciReplay::initialize(this);
161 }
162 }
163
164
165 // ------------------------------------------------------------------
166 // ciMethod::ciMethod
167 //
168 // Unloaded method.
169 ciMethod::ciMethod(ciInstanceKlass* holder,
170 ciSymbol* name,
171 ciSymbol* signature,
172 ciInstanceKlass* accessor) :
173 ciMetadata((Metadata*)nullptr),
174 _name( name),
175 _holder( holder),
176 _method_data( nullptr),
177 _method_blocks( nullptr),
178 _intrinsic_id( vmIntrinsics::_none),
179 _inline_instructions_size(-1),
180 _can_be_statically_bound(false),
181 _can_omit_stack_trace(true),
182 _liveness( nullptr)
183 #if defined(COMPILER2)
184 ,
185 _flow( nullptr),
186 _bcea( nullptr)
187 #endif // COMPILER2
188 {
189 // Usually holder and accessor are the same type but in some cases
190 // the holder has the wrong class loader (e.g. invokedynamic call
191 // sites) so we pass the accessor.
192 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
193 }
194
195
196 // ------------------------------------------------------------------
197 // ciMethod::load_code
198 //
199 // Load the bytecodes and exception handler table for this method.
200 void ciMethod::load_code() {
201 VM_ENTRY_MARK;
202 assert(is_loaded(), "only loaded methods have code");
203
204 Method* me = get_Method();
205 Arena* arena = CURRENT_THREAD_ENV->arena();
206
207 // Load the bytecodes.
208 _code = (address)arena->Amalloc(code_size());
209 memcpy(_code, me->code_base(), code_size());
210
211 #if INCLUDE_JVMTI
212 // Revert any breakpoint bytecodes in ci's copy
213 if (me->number_of_breakpoints() > 0) {
214 BreakpointInfo* bp = me->method_holder()->breakpoints();
215 for (; bp != nullptr; bp = bp->next()) {
216 if (bp->match(me)) {
217 code_at_put(bp->bci(), bp->orig_bytecode());
218 }
219 }
220 }
221 #endif
222
223 // And load the exception table.
224 ExceptionTable exc_table(me);
225
226 // Allocate one extra spot in our list of exceptions. This
227 // last entry will be used to represent the possibility that
228 // an exception escapes the method. See ciExceptionHandlerStream
229 // for details.
230 _exception_handlers =
231 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
232 * (_handler_count + 1));
233 if (_handler_count > 0) {
234 for (int i=0; i<_handler_count; i++) {
235 _exception_handlers[i] = new (arena) ciExceptionHandler(
236 holder(),
237 /* start */ exc_table.start_pc(i),
238 /* limit */ exc_table.end_pc(i),
239 /* goto pc */ exc_table.handler_pc(i),
240 /* cp index */ exc_table.catch_type_index(i));
241 }
242 }
243
244 // Put an entry at the end of our list to represent the possibility
245 // of exceptional exit.
246 _exception_handlers[_handler_count] =
247 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
248
249 if (CIPrintMethodCodes) {
250 print_codes();
251 }
252 }
253
254
255 // ------------------------------------------------------------------
256 // ciMethod::has_linenumber_table
257 //
258 // length unknown until decompression
259 bool ciMethod::has_linenumber_table() const {
260 check_is_loaded();
261 VM_ENTRY_MARK;
262 return get_Method()->has_linenumber_table();
263 }
264
265
266 // ------------------------------------------------------------------
267 // ciMethod::line_number_from_bci
268 int ciMethod::line_number_from_bci(int bci) const {
269 check_is_loaded();
270 VM_ENTRY_MARK;
271 return get_Method()->line_number_from_bci(bci);
272 }
273
274
275 // ------------------------------------------------------------------
276 // ciMethod::vtable_index
277 //
278 // Get the position of this method's entry in the vtable, if any.
279 int ciMethod::vtable_index() {
280 check_is_loaded();
281 assert(holder()->is_linked(), "must be linked");
282 VM_ENTRY_MARK;
283 return get_Method()->vtable_index();
284 }
285
286 // ------------------------------------------------------------------
287 // ciMethod::uses_balanced_monitors
288 //
289 // Does this method use monitors in a strict stack-disciplined manner?
290 bool ciMethod::has_balanced_monitors() {
291 check_is_loaded();
292 if (_balanced_monitors) return true;
293
294 // Analyze the method to see if monitors are used properly.
295 VM_ENTRY_MARK;
296 methodHandle method(THREAD, get_Method());
297 assert(method->has_monitor_bytecodes(), "should have checked this");
298
299 // Check to see if a previous compilation computed the
300 // monitor-matching analysis.
301 if (method->guaranteed_monitor_matching()) {
302 _balanced_monitors = true;
303 return true;
304 }
305
306 {
307 ExceptionMark em(THREAD);
308 ResourceMark rm(THREAD);
309 GeneratePairingInfo gpi(method);
310 if (!gpi.compute_map(THREAD)) {
311 fatal("Unrecoverable verification or out-of-memory error");
312 }
313 if (!gpi.monitor_safe()) {
314 return false;
315 }
316 method->set_guaranteed_monitor_matching();
317 _balanced_monitors = true;
318 }
319 return true;
320 }
321
322
323 // ------------------------------------------------------------------
324 // ciMethod::get_flow_analysis
325 ciTypeFlow* ciMethod::get_flow_analysis() {
326 #if defined(COMPILER2)
327 if (_flow == nullptr) {
328 ciEnv* env = CURRENT_ENV;
329 _flow = new (env->arena()) ciTypeFlow(env, this);
330 _flow->do_flow();
331 }
332 return _flow;
333 #else // COMPILER2
334 ShouldNotReachHere();
335 return nullptr;
336 #endif // COMPILER2
337 }
338
339
340 // ------------------------------------------------------------------
341 // ciMethod::get_osr_flow_analysis
342 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
343 #if defined(COMPILER2)
344 // OSR entry points are always place after a call bytecode of some sort
345 assert(osr_bci >= 0, "must supply valid OSR entry point");
346 ciEnv* env = CURRENT_ENV;
347 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
348 flow->do_flow();
349 return flow;
350 #else // COMPILER2
351 ShouldNotReachHere();
352 return nullptr;
353 #endif // COMPILER2
354 }
355
356 // ------------------------------------------------------------------
357 // ciMethod::raw_liveness_at_bci
358 //
359 // Which local variables are live at a specific bci?
360 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
361 check_is_loaded();
362 if (_liveness == nullptr) {
363 // Create the liveness analyzer.
364 Arena* arena = CURRENT_ENV->arena();
365 _liveness = new (arena) MethodLiveness(arena, this);
366 _liveness->compute_liveness();
367 }
368 return _liveness->get_liveness_at(bci);
369 }
370
371 // ------------------------------------------------------------------
372 // ciMethod::liveness_at_bci
373 //
374 // Which local variables are live at a specific bci? When debugging
375 // will return true for all locals in some cases to improve debug
376 // information.
377 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
378 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
379 // Keep all locals live for the user's edification and amusement.
380 MethodLivenessResult result(_max_locals);
381 result.set_range(0, _max_locals);
382 result.set_is_valid();
383 return result;
384 }
385 return raw_liveness_at_bci(bci);
386 }
387
388 // ciMethod::live_local_oops_at_bci
389 //
390 // find all the live oops in the locals array for a particular bci
391 // Compute what the interpreter believes by using the interpreter
392 // oopmap generator. This is used as a double check during osr to
393 // guard against conservative result from MethodLiveness making us
394 // think a dead oop is live. MethodLiveness is conservative in the
395 // sense that it may consider locals to be live which cannot be live,
396 // like in the case where a local could contain an oop or a primitive
397 // along different paths. In that case the local must be dead when
398 // those paths merge. Since the interpreter's viewpoint is used when
399 // gc'ing an interpreter frame we need to use its viewpoint during
400 // OSR when loading the locals.
401
402 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
403 VM_ENTRY_MARK;
404 InterpreterOopMap mask;
405 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
406 int mask_size = max_locals();
407 ResourceBitMap result(mask_size);
408 int i;
409 for (i = 0; i < mask_size ; i++ ) {
410 if (mask.is_oop(i)) result.set_bit(i);
411 }
412 return result;
413 }
414
415
416 #ifdef COMPILER1
417 // ------------------------------------------------------------------
418 // ciMethod::bci_block_start
419 //
420 // Marks all bcis where a new basic block starts
421 const BitMap& ciMethod::bci_block_start() {
422 check_is_loaded();
423 if (_liveness == nullptr) {
424 // Create the liveness analyzer.
425 Arena* arena = CURRENT_ENV->arena();
426 _liveness = new (arena) MethodLiveness(arena, this);
427 _liveness->compute_liveness();
428 }
429
430 return _liveness->get_bci_block_start();
431 }
432 #endif // COMPILER1
433
434
435 // ------------------------------------------------------------------
436 // ciMethod::check_overflow
437 //
438 // Check whether the profile counter is overflowed and adjust if true.
439 // For invoke* it will turn negative values into max_jint,
440 // and for checkcast/aastore/instanceof turn positive values into min_jint.
441 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
442 switch (code) {
443 case Bytecodes::_aastore: // fall-through
444 case Bytecodes::_checkcast: // fall-through
445 case Bytecodes::_instanceof: {
446 if (VM_Version::profile_all_receivers_at_type_check()) {
447 return (c < 0 ? max_jint : c); // always non-negative
448 }
449 return (c > 0 ? min_jint : c); // always non-positive
450 }
451 default: {
452 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
453 return (c < 0 ? max_jint : c); // always non-negative
454 }
455 }
456 }
457
458
459 // ------------------------------------------------------------------
460 // ciMethod::call_profile_at_bci
461 //
462 // Get the ciCallProfile for the invocation of this method.
463 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
464 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
465 ResourceMark rm;
466 ciCallProfile result;
467 if (method_data() != nullptr && method_data()->is_mature()) {
468 ciProfileData* data = method_data()->bci_to_data(bci);
469 if (data != nullptr && data->is_CounterData()) {
470 // Every profiled call site has a counter.
471 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
472
473 if (!data->is_ReceiverTypeData()) {
474 result._receiver_count[0] = 0; // that's a definite zero
475 } else { // ReceiverTypeData is a subclass of CounterData
476 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
477 // In addition, virtual call sites have receiver type information
478 int receivers_count_total = 0;
479 int morphism = 0;
480 // Precompute morphism for the possible fixup
481 for (uint i = 0; i < call->row_limit(); i++) {
482 ciKlass* receiver = call->receiver(i);
483 if (receiver == nullptr) continue;
484 morphism++;
485 }
486 int epsilon = 0;
487 // For a call, it is assumed that either the type of the receiver(s)
488 // is recorded or an associated counter is incremented, but not both. With
489 // tiered compilation, however, both can happen due to the interpreter and
490 // C1 profiling invocations differently. Address that inconsistency here.
491 if (morphism == 1 && count > 0) {
492 epsilon = count;
493 count = 0;
494 }
495 for (uint i = 0; i < call->row_limit(); i++) {
496 ciKlass* receiver = call->receiver(i);
497 if (receiver == nullptr) continue;
498 int rcount = saturated_add(call->receiver_count(i), epsilon);
499 if (rcount == 0) rcount = 1; // Should be valid value
500 receivers_count_total = saturated_add(receivers_count_total, rcount);
501 // Add the receiver to result data.
502 result.add_receiver(receiver, rcount);
503 // If we extend profiling to record methods,
504 // we will set result._method also.
505 }
506 // Determine call site's morphism.
507 // The call site count is 0 with known morphism (only 1 or 2 receivers)
508 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
509 // The call site count is > 0 in the case of a polymorphic virtual call.
510 if (morphism > 0 && morphism == result._limit) {
511 // The morphism <= MorphismLimit.
512 if ((morphism < ciCallProfile::MorphismLimit) ||
513 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
514 #ifdef ASSERT
515 if (count > 0) {
516 this->print_short_name(tty);
517 tty->print_cr(" @ bci:%d", bci);
518 this->print_codes();
519 assert(false, "this call site should not be polymorphic");
520 }
521 #endif
522 result._morphism = morphism;
523 }
524 }
525 // Make the count consistent if this is a call profile. If count is
526 // zero or less, presume that this is a typecheck profile and
527 // do nothing. Otherwise, increase count to be the sum of all
528 // receiver's counts.
529 if (count >= 0) {
530 count = saturated_add(count, receivers_count_total);
531 }
532 }
533 result._count = count;
534 }
535 }
536 return result;
537 }
538
539 // ------------------------------------------------------------------
540 // Add new receiver and sort data by receiver's profile count.
541 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
542 // Add new receiver and sort data by receiver's counts when we have space
543 // for it otherwise replace the less called receiver (less called receiver
544 // is placed to the last array element which is not used).
545 // First array's element contains most called receiver.
546 int i = _limit;
547 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
548 _receiver[i] = _receiver[i-1];
549 _receiver_count[i] = _receiver_count[i-1];
550 }
551 _receiver[i] = receiver;
552 _receiver_count[i] = receiver_count;
553 if (_limit < MorphismLimit) _limit++;
554 }
555
556
557 void ciMethod::assert_virtual_call_type_ok(int bci) {
558 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
559 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
560 }
561
562 void ciMethod::assert_call_type_ok(int bci) {
563 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
564 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
565 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
566 }
567
568 /**
569 * Check whether profiling provides a type for the argument i to the
570 * call at bci bci
571 *
572 * @param [in]bci bci of the call
573 * @param [in]i argument number
574 * @param [out]type profiled type of argument, null if none
575 * @param [out]ptr_kind whether always null, never null or maybe null
576 * @return true if profiling exists
577 *
578 */
579 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
580 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
581 ciProfileData* data = method_data()->bci_to_data(bci);
582 if (data != nullptr) {
583 if (data->is_VirtualCallTypeData()) {
584 assert_virtual_call_type_ok(bci);
585 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
586 if (i >= call->number_of_arguments()) {
587 return false;
588 }
589 type = call->valid_argument_type(i);
590 ptr_kind = call->argument_ptr_kind(i);
591 return true;
592 } else if (data->is_CallTypeData()) {
593 assert_call_type_ok(bci);
594 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
595 if (i >= call->number_of_arguments()) {
596 return false;
597 }
598 type = call->valid_argument_type(i);
599 ptr_kind = call->argument_ptr_kind(i);
600 return true;
601 }
602 }
603 }
604 return false;
605 }
606
607 /**
608 * Check whether profiling provides a type for the return value from
609 * the call at bci bci
610 *
611 * @param [in]bci bci of the call
612 * @param [out]type profiled type of argument, null if none
613 * @param [out]ptr_kind whether always null, never null or maybe null
614 * @return true if profiling exists
615 *
616 */
617 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
618 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) {
619 ciProfileData* data = method_data()->bci_to_data(bci);
620 if (data != nullptr) {
621 if (data->is_VirtualCallTypeData()) {
622 assert_virtual_call_type_ok(bci);
623 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
624 if (call->has_return()) {
625 type = call->valid_return_type();
626 ptr_kind = call->return_ptr_kind();
627 return true;
628 }
629 } else if (data->is_CallTypeData()) {
630 assert_call_type_ok(bci);
631 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
632 if (call->has_return()) {
633 type = call->valid_return_type();
634 ptr_kind = call->return_ptr_kind();
635 }
636 return true;
637 }
638 }
639 }
640 return false;
641 }
642
643 /**
644 * Check whether profiling provides a type for the parameter i
645 *
646 * @param [in]i parameter number
647 * @param [out]type profiled type of parameter, null if none
648 * @param [out]ptr_kind whether always null, never null or maybe null
649 * @return true if profiling exists
650 *
651 */
652 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
653 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
654 ciParametersTypeData* parameters = method_data()->parameters_type_data();
655 if (parameters != nullptr && i < parameters->number_of_parameters()) {
656 type = parameters->valid_parameter_type(i);
657 ptr_kind = parameters->parameter_ptr_kind(i);
658 return true;
659 }
660 }
661 return false;
662 }
663
664
665 // ------------------------------------------------------------------
666 // ciMethod::find_monomorphic_target
667 //
668 // Given a certain calling environment, find the monomorphic target
669 // for the call. Return null if the call is not monomorphic in
670 // its calling environment, or if there are only abstract methods.
671 // The returned method is never abstract.
672 // Note: If caller uses a non-null result, it must inform dependencies
673 // via assert_unique_concrete_method or assert_leaf_type.
674 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
675 ciInstanceKlass* callee_holder,
676 ciInstanceKlass* actual_recv,
677 bool check_access) {
678 check_is_loaded();
679
680 if (actual_recv->is_interface()) {
681 // %%% We cannot trust interface types, yet. See bug 6312651.
682 return nullptr;
683 }
684
685 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
686 if (root_m == nullptr) {
687 // Something went wrong looking up the actual receiver method.
688 return nullptr;
689 }
690
691 // Make certain quick checks even if UseCHA is false.
692
693 // Is it private or final?
694 if (root_m->can_be_statically_bound()) {
695 assert(!root_m->is_abstract(), "sanity");
696 return root_m;
697 }
698
699 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
700 // Easy case. There is no other place to put a method, so don't bother
701 // to go through the VM_ENTRY_MARK and all the rest.
702 if (root_m->is_abstract()) {
703 return nullptr;
704 }
705 return root_m;
706 }
707
708 // Array methods (clone, hashCode, etc.) are always statically bound.
709 // If we were to see an array type here, we'd return root_m.
710 // However, this method processes only ciInstanceKlasses. (See 4962591.)
711 // The inline_native_clone intrinsic narrows Object to T[] properly,
712 // so there is no need to do the same job here.
713
714 if (!UseCHA) return nullptr;
715
716 VM_ENTRY_MARK;
717
718 methodHandle target;
719 {
720 MutexLocker locker(Compile_lock);
721 InstanceKlass* context = actual_recv->get_instanceKlass();
722 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
723 root_m->get_Method(),
724 callee_holder->get_Klass(),
725 this->get_Method()));
726 assert(target() == nullptr || !target()->is_abstract(), "not allowed");
727 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
728 }
729
730 #ifndef PRODUCT
731 LogTarget(Debug, dependencies) lt;
732 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) {
733 LogStream ls(<);
734 ls.print("found a non-root unique target method");
735 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name());
736 ls.print(" method = ");
737 target->print_short_name(&ls);
738 ls.cr();
739 }
740 #endif //PRODUCT
741
742 if (target() == nullptr) {
743 return nullptr;
744 }
745
746 // Redefinition support.
747 if (this->is_old() || root_m->is_old() || target->is_old()) {
748 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
749 return nullptr;
750 }
751
752 if (target() == root_m->get_Method()) {
753 return root_m;
754 }
755 if (!root_m->is_public() &&
756 !root_m->is_protected()) {
757 // If we are going to reason about inheritance, it's easiest
758 // if the method in question is public, protected, or private.
759 // If the answer is not root_m, it is conservatively correct
760 // to return null, even if the CHA encountered irrelevant
761 // methods in other packages.
762 // %%% TO DO: Work out logic for package-private methods
763 // with the same name but different vtable indexes.
764 return nullptr;
765 }
766 return CURRENT_THREAD_ENV->get_method(target());
767 }
768
769 // ------------------------------------------------------------------
770 // ciMethod::can_be_statically_bound
771 //
772 // Tries to determine whether a method can be statically bound in some context.
773 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
774 return (holder() == context) && can_be_statically_bound();
775 }
776
777 // ------------------------------------------------------------------
778 // ciMethod::can_omit_stack_trace
779 //
780 // Tries to determine whether a method can omit stack trace in throw in compiled code.
781 bool ciMethod::can_omit_stack_trace() const {
782 if (!StackTraceInThrowable) {
783 return true; // stack trace is switched off.
784 }
785 if (!OmitStackTraceInFastThrow) {
786 return false; // Have to provide stack trace.
787 }
788 return _can_omit_stack_trace;
789 }
790
791 // ------------------------------------------------------------------
792 // ciMethod::resolve_invoke
793 //
794 // Given a known receiver klass, find the target for the call.
795 // Return null if the call has no target or the target is abstract.
796 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
797 check_is_loaded();
798 VM_ENTRY_MARK;
799
800 Klass* caller_klass = caller->get_Klass();
801 Klass* recv = exact_receiver->get_Klass();
802 Klass* resolved = holder()->get_Klass();
803 Symbol* h_name = name()->get_symbol();
804 Symbol* h_signature = signature()->get_symbol();
805
806 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
807 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
808 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
809 Method* m = nullptr;
810 // Only do exact lookup if receiver klass has been linked. Otherwise,
811 // the vtable has not been setup, and the LinkResolver will fail.
812 if (recv->is_array_klass()
813 ||
814 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
815 if (holder()->is_interface()) {
816 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
817 } else {
818 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
819 }
820 }
821
822 if (m == nullptr) {
823 // Return null only if there was a problem with lookup (uninitialized class, etc.)
824 return nullptr;
825 }
826
827 ciMethod* result = this;
828 if (m != get_Method()) {
829 // Redefinition support.
830 if (this->is_old() || m->is_old()) {
831 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected");
832 return nullptr;
833 }
834
835 result = CURRENT_THREAD_ENV->get_method(m);
836 }
837
838 if (result->is_abstract() && !allow_abstract) {
839 // Don't return abstract methods because they aren't optimizable or interesting.
840 return nullptr;
841 }
842 return result;
843 }
844
845 // ------------------------------------------------------------------
846 // ciMethod::resolve_vtable_index
847 //
848 // Given a known receiver klass, find the vtable index for the call.
849 // Return Method::invalid_vtable_index if the vtable_index is unknown.
850 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
851 check_is_loaded();
852
853 int vtable_index = Method::invalid_vtable_index;
854 // Only do lookup if receiver klass has been linked. Otherwise,
855 // the vtable has not been setup, and the LinkResolver will fail.
856 if (!receiver->is_interface()
857 && (!receiver->is_instance_klass() ||
858 receiver->as_instance_klass()->is_linked())) {
859 VM_ENTRY_MARK;
860
861 Klass* caller_klass = caller->get_Klass();
862 Klass* recv = receiver->get_Klass();
863 Symbol* h_name = name()->get_symbol();
864 Symbol* h_signature = signature()->get_symbol();
865
866 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
867 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
868 if (vtable_index == Method::nonvirtual_vtable_index) {
869 // A statically bound method. Return "no such index".
870 vtable_index = Method::invalid_vtable_index;
871 }
872 }
873
874 return vtable_index;
875 }
876
877 // ------------------------------------------------------------------
878 // ciMethod::get_field_at_bci
879 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
880 ciBytecodeStream iter(this);
881 iter.reset_to_bci(bci);
882 iter.next();
883 return iter.get_field(will_link);
884 }
885
886 // ------------------------------------------------------------------
887 // ciMethod::get_method_at_bci
888 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
889 ciBytecodeStream iter(this);
890 iter.reset_to_bci(bci);
891 iter.next();
892 return iter.get_method(will_link, declared_signature);
893 }
894
895 // ------------------------------------------------------------------
896 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
897 ciBytecodeStream iter(this);
898 iter.reset_to_bci(bci);
899 iter.next();
900 return iter.get_declared_method_holder();
901 }
902
903 // ------------------------------------------------------------------
904 // Adjust a CounterData count to be commensurate with
905 // interpreter_invocation_count. If the MDO exists for
906 // only 25% of the time the method exists, then the
907 // counts in the MDO should be scaled by 4X, so that
908 // they can be usefully and stably compared against the
909 // invocation counts in methods.
910 int ciMethod::scale_count(int count, float prof_factor) {
911 if (count > 0 && method_data() != nullptr) {
912 int counter_life = method_data()->invocation_count();
913 int method_life = interpreter_invocation_count();
914 if (method_life < counter_life) { // may happen because of the snapshot timing
915 method_life = counter_life;
916 }
917 if (counter_life > 0) {
918 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
919 count = (count > 0) ? count : 1;
920 } else {
921 count = 1;
922 }
923 }
924 return count;
925 }
926
927
928 // ------------------------------------------------------------------
929 // ciMethod::is_special_get_caller_class_method
930 //
931 bool ciMethod::is_ignored_by_security_stack_walk() const {
932 check_is_loaded();
933 VM_ENTRY_MARK;
934 return get_Method()->is_ignored_by_security_stack_walk();
935 }
936
937 // ------------------------------------------------------------------
938 // ciMethod::needs_clinit_barrier
939 //
940 bool ciMethod::needs_clinit_barrier() const {
941 check_is_loaded();
942 return is_static() && !holder()->is_initialized();
943 }
944
945 // ------------------------------------------------------------------
946 // invokedynamic support
947
948 // ------------------------------------------------------------------
949 // ciMethod::is_method_handle_intrinsic
950 //
951 // Return true if the method is an instance of the JVM-generated
952 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
953 bool ciMethod::is_method_handle_intrinsic() const {
954 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
955 return (MethodHandles::is_signature_polymorphic(iid) &&
956 MethodHandles::is_signature_polymorphic_intrinsic(iid));
957 }
958
959 // ------------------------------------------------------------------
960 // ciMethod::is_compiled_lambda_form
961 //
962 // Return true if the method is a generated MethodHandle adapter.
963 // These are built by Java code.
964 bool ciMethod::is_compiled_lambda_form() const {
965 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
966 return iid == vmIntrinsics::_compiledLambdaForm;
967 }
968
969 // ------------------------------------------------------------------
970 // ciMethod::is_object_initializer
971 //
972 bool ciMethod::is_object_initializer() const {
973 return name() == ciSymbols::object_initializer_name();
974 }
975
976 // ------------------------------------------------------------------
977 // ciMethod::is_scoped
978 //
979 // Return true for methods annotated with @Scoped
980 bool ciMethod::is_scoped() const {
981 return get_Method()->is_scoped();
982 }
983
984 // ------------------------------------------------------------------
985 // ciMethod::has_member_arg
986 //
987 // Return true if the method is a linker intrinsic like _linkToVirtual.
988 // These are built by the JVM.
989 bool ciMethod::has_member_arg() const {
990 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
991 return (MethodHandles::is_signature_polymorphic(iid) &&
992 MethodHandles::has_member_arg(iid));
993 }
994
995 // ------------------------------------------------------------------
996 // ciMethod::ensure_method_data
997 //
998 // Generate new MethodData* objects at compile time.
999 // Return true if allocation was successful or no MDO is required.
1000 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1001 EXCEPTION_CONTEXT;
1002 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1003 return true;
1004 }
1005 if (h_m()->method_data() == nullptr) {
1006 Method::build_profiling_method_data(h_m, THREAD);
1007 if (HAS_PENDING_EXCEPTION) {
1008 CLEAR_PENDING_EXCEPTION;
1009 }
1010 }
1011 if (h_m()->method_data() != nullptr) {
1012 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1013 return _method_data->load_data();
1014 } else {
1015 _method_data = CURRENT_ENV->get_empty_methodData();
1016 return false;
1017 }
1018 }
1019
1020 // public, retroactive version
1021 bool ciMethod::ensure_method_data() {
1022 bool result = true;
1023 if (_method_data == nullptr || _method_data->is_empty()) {
1024 GUARDED_VM_ENTRY({
1025 methodHandle mh(Thread::current(), get_Method());
1026 result = ensure_method_data(mh);
1027 });
1028 }
1029 return result;
1030 }
1031
1032
1033 // ------------------------------------------------------------------
1034 // ciMethod::method_data
1035 //
1036 ciMethodData* ciMethod::method_data() {
1037 if (_method_data != nullptr) {
1038 return _method_data;
1039 }
1040 VM_ENTRY_MARK;
1041 ciEnv* env = CURRENT_ENV;
1042 Thread* my_thread = JavaThread::current();
1043 methodHandle h_m(my_thread, get_Method());
1044
1045 if (h_m()->method_data() != nullptr) {
1046 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1047 _method_data->load_data();
1048 } else {
1049 _method_data = CURRENT_ENV->get_empty_methodData();
1050 }
1051 return _method_data;
1052
1053 }
1054
1055 // ------------------------------------------------------------------
1056 // ciMethod::method_data_or_null
1057 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1058 // null otherwise.
1059 ciMethodData* ciMethod::method_data_or_null() {
1060 ciMethodData *md = method_data();
1061 if (md->is_empty()) {
1062 return nullptr;
1063 }
1064 return md;
1065 }
1066
1067 // ------------------------------------------------------------------
1068 // ciMethod::ensure_method_counters
1069 //
1070 MethodCounters* ciMethod::ensure_method_counters() {
1071 check_is_loaded();
1072 VM_ENTRY_MARK;
1073 methodHandle mh(THREAD, get_Method());
1074 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1075 return method_counters;
1076 }
1077
1078 // ------------------------------------------------------------------
1079 // ciMethod::has_option
1080 //
1081 bool ciMethod::has_option(CompileCommandEnum option) {
1082 check_is_loaded();
1083 VM_ENTRY_MARK;
1084 methodHandle mh(THREAD, get_Method());
1085 return CompilerOracle::has_option(mh, option);
1086 }
1087
1088 // ------------------------------------------------------------------
1089 // ciMethod::has_option_value
1090 //
1091 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1092 check_is_loaded();
1093 VM_ENTRY_MARK;
1094 methodHandle mh(THREAD, get_Method());
1095 return CompilerOracle::has_option_value(mh, option, value);
1096 }
1097 // ------------------------------------------------------------------
1098 // ciMethod::can_be_compiled
1099 //
1100 // Have previous compilations of this method succeeded?
1101 bool ciMethod::can_be_compiled() {
1102 check_is_loaded();
1103 ciEnv* env = CURRENT_ENV;
1104 if (is_c1_compile(env->comp_level())) {
1105 return _is_c1_compilable;
1106 }
1107 return _is_c2_compilable;
1108 }
1109
1110 // ------------------------------------------------------------------
1111 // ciMethod::has_compiled_code
1112 bool ciMethod::has_compiled_code() {
1113 return inline_instructions_size() > 0;
1114 }
1115
1116 int ciMethod::highest_osr_comp_level() {
1117 check_is_loaded();
1118 VM_ENTRY_MARK;
1119 return get_Method()->highest_osr_comp_level();
1120 }
1121
1122 // ------------------------------------------------------------------
1123 // ciMethod::code_size_for_inlining
1124 //
1125 // Code size for inlining decisions. This method returns a code
1126 // size of 1 for methods which has the ForceInline annotation.
1127 int ciMethod::code_size_for_inlining() {
1128 check_is_loaded();
1129 if (get_Method()->force_inline()) {
1130 return 1;
1131 }
1132 return code_size();
1133 }
1134
1135 // ------------------------------------------------------------------
1136 // ciMethod::inline_instructions_size
1137 //
1138 // This is a rough metric for "fat" methods, compared before inlining
1139 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1140 // junk like exception handler, stubs, and constant table, which are
1141 // not highly relevant to an inlined method. So we use the more
1142 // specific accessor nmethod::insts_size.
1143 // Also some instructions inside the code are excluded from inline
1144 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter)
1145 int ciMethod::inline_instructions_size() {
1146 if (_inline_instructions_size == -1) {
1147 GUARDED_VM_ENTRY(
1148 nmethod* code = get_Method()->code();
1149 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1150 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size();
1151 _inline_instructions_size = isize > 0 ? isize : 0;
1152 } else {
1153 _inline_instructions_size = 0;
1154 }
1155 );
1156 }
1157 return _inline_instructions_size;
1158 }
1159
1160 // ------------------------------------------------------------------
1161 // ciMethod::log_nmethod_identity
1162 void ciMethod::log_nmethod_identity(xmlStream* log) {
1163 GUARDED_VM_ENTRY(
1164 nmethod* code = get_Method()->code();
1165 if (code != nullptr) {
1166 code->log_identity(log);
1167 }
1168 )
1169 }
1170
1171 // ------------------------------------------------------------------
1172 // ciMethod::is_not_reached
1173 bool ciMethod::is_not_reached(int bci) {
1174 check_is_loaded();
1175 VM_ENTRY_MARK;
1176 return Interpreter::is_not_reached(
1177 methodHandle(THREAD, get_Method()), bci);
1178 }
1179
1180 // ------------------------------------------------------------------
1181 // ciMethod::was_never_executed
1182 bool ciMethod::was_executed_more_than(int times) {
1183 VM_ENTRY_MARK;
1184 return get_Method()->was_executed_more_than(times);
1185 }
1186
1187 // ------------------------------------------------------------------
1188 // ciMethod::has_unloaded_classes_in_signature
1189 bool ciMethod::has_unloaded_classes_in_signature() {
1190 // ciSignature is resolved against some accessing class and
1191 // signature classes aren't required to be local. As a benefit,
1192 // it makes signature classes visible through loader constraints.
1193 // So, encountering an unloaded class signals it is absent both in
1194 // the callee (local) and caller contexts.
1195 return signature()->has_unloaded_classes();
1196 }
1197
1198 // ------------------------------------------------------------------
1199 // ciMethod::is_klass_loaded
1200 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1201 VM_ENTRY_MARK;
1202 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
1203 }
1204
1205 // ------------------------------------------------------------------
1206 // ciMethod::check_call
1207 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1208 // This method is used only in C2 from InlineTree::ok_to_inline,
1209 // and is only used under -Xcomp.
1210 // It appears to fail when applied to an invokeinterface call site.
1211 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1212 VM_ENTRY_MARK;
1213 {
1214 ExceptionMark em(THREAD);
1215 HandleMark hm(THREAD);
1216 constantPoolHandle pool (THREAD, get_Method()->constants());
1217 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1218 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1219 if (HAS_PENDING_EXCEPTION) {
1220 CLEAR_PENDING_EXCEPTION;
1221 return false;
1222 } else {
1223 return (spec_method->is_static() == is_static);
1224 }
1225 }
1226 return false;
1227 }
1228 // ------------------------------------------------------------------
1229 // ciMethod::print_codes
1230 //
1231 // Print the bytecodes for this method.
1232 void ciMethod::print_codes_on(outputStream* st) {
1233 check_is_loaded();
1234 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1235 }
1236
1237
1238 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1239 check_is_loaded(); \
1240 VM_ENTRY_MARK; \
1241 return get_Method()->flag_accessor(); \
1242 }
1243
1244 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1245 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1246 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1247 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1248 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1249 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1250
1251 bool ciMethod::is_boxing_method() const {
1252 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1253 switch (intrinsic_id()) {
1254 case vmIntrinsics::_Boolean_valueOf:
1255 case vmIntrinsics::_Byte_valueOf:
1256 case vmIntrinsics::_Character_valueOf:
1257 case vmIntrinsics::_Short_valueOf:
1258 case vmIntrinsics::_Integer_valueOf:
1259 case vmIntrinsics::_Long_valueOf:
1260 case vmIntrinsics::_Float_valueOf:
1261 case vmIntrinsics::_Double_valueOf:
1262 return true;
1263 default:
1264 return false;
1265 }
1266 }
1267 return false;
1268 }
1269
1270 bool ciMethod::is_unboxing_method() const {
1271 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1272 switch (intrinsic_id()) {
1273 case vmIntrinsics::_booleanValue:
1274 case vmIntrinsics::_byteValue:
1275 case vmIntrinsics::_charValue:
1276 case vmIntrinsics::_shortValue:
1277 case vmIntrinsics::_intValue:
1278 case vmIntrinsics::_longValue:
1279 case vmIntrinsics::_floatValue:
1280 case vmIntrinsics::_doubleValue:
1281 return true;
1282 default:
1283 return false;
1284 }
1285 }
1286 return false;
1287 }
1288
1289 bool ciMethod::is_vector_method() const {
1290 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1291 (intrinsic_id() != vmIntrinsics::_none);
1292 }
1293
1294 BCEscapeAnalyzer *ciMethod::get_bcea() {
1295 #ifdef COMPILER2
1296 if (_bcea == nullptr) {
1297 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr);
1298 }
1299 return _bcea;
1300 #else // COMPILER2
1301 ShouldNotReachHere();
1302 return nullptr;
1303 #endif // COMPILER2
1304 }
1305
1306 ciMethodBlocks *ciMethod::get_method_blocks() {
1307 if (_method_blocks == nullptr) {
1308 Arena *arena = CURRENT_ENV->arena();
1309 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1310 }
1311 return _method_blocks;
1312 }
1313
1314 #undef FETCH_FLAG_FROM_VM
1315
1316 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1317 st->print("%s %s %s",
1318 CURRENT_ENV->replay_name(method->method_holder()),
1319 method->name()->as_quoted_ascii(),
1320 method->signature()->as_quoted_ascii());
1321 }
1322
1323 void ciMethod::dump_name_as_ascii(outputStream* st) {
1324 Method* method = get_Method();
1325 dump_name_as_ascii(st, method);
1326 }
1327
1328 void ciMethod::dump_replay_data(outputStream* st) {
1329 ResourceMark rm;
1330 Method* method = get_Method();
1331 if (MethodHandles::is_signature_polymorphic_method(method)) {
1332 // ignore for now
1333 return;
1334 }
1335 MethodCounters* mcs = method->method_counters();
1336 st->print("ciMethod ");
1337 dump_name_as_ascii(st);
1338 st->print_cr(" %d %d %d %d %d",
1339 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(),
1340 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(),
1341 interpreter_invocation_count(),
1342 interpreter_throwout_count(),
1343 _inline_instructions_size);
1344 }
1345
1346 // ------------------------------------------------------------------
1347 // ciMethod::print_codes
1348 //
1349 // Print a range of the bytecodes for this method.
1350 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1351 check_is_loaded();
1352 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1353 }
1354
1355 // ------------------------------------------------------------------
1356 // ciMethod::print_name
1357 //
1358 // Print the name of this method, including signature and some flags.
1359 void ciMethod::print_name(outputStream* st) {
1360 check_is_loaded();
1361 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1362 }
1363
1364 // ------------------------------------------------------------------
1365 // ciMethod::print_short_name
1366 //
1367 // Print the name of this method, without signature.
1368 void ciMethod::print_short_name(outputStream* st) {
1369 if (is_loaded()) {
1370 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1371 } else {
1372 // Fall back if method is not loaded.
1373 holder()->print_name_on(st);
1374 st->print("::");
1375 name()->print_symbol_on(st);
1376 if (WizardMode)
1377 signature()->as_symbol()->print_symbol_on(st);
1378 }
1379 }
1380
1381 // ------------------------------------------------------------------
1382 // ciMethod::print_impl
1383 //
1384 // Implementation of the print method.
1385 void ciMethod::print_impl(outputStream* st) {
1386 ciMetadata::print_impl(st);
1387 st->print(" name=");
1388 name()->print_symbol_on(st);
1389 st->print(" holder=");
1390 holder()->print_name_on(st);
1391 st->print(" signature=");
1392 signature()->as_symbol()->print_symbol_on(st);
1393 if (is_loaded()) {
1394 st->print(" loaded=true");
1395 st->print(" arg_size=%d", arg_size());
1396 st->print(" flags=");
1397 flags().print_member_flags(st);
1398 } else {
1399 st->print(" loaded=false");
1400 }
1401 }
1402
1403 // ------------------------------------------------------------------
1404
1405 static BasicType erase_to_word_type(BasicType bt) {
1406 if (is_subword_type(bt)) return T_INT;
1407 if (is_reference_type(bt)) return T_OBJECT;
1408 return bt;
1409 }
1410
1411 static bool basic_types_match(ciType* t1, ciType* t2) {
1412 if (t1 == t2) return true;
1413 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1414 }
1415
1416 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1417 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1418 !resolved_method->is_method_handle_intrinsic();
1419
1420 if (!invoke_through_mh_intrinsic) {
1421 // Method name & descriptor should stay the same.
1422 // Signatures may reference unloaded types and thus they may be not strictly equal.
1423 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1424 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1425
1426 return (declared_method->name()->equals(resolved_method->name())) &&
1427 (declared_signature->equals(resolved_signature));
1428 }
1429
1430 ciMethod* linker = declared_method;
1431 ciMethod* target = resolved_method;
1432 // Linkers have appendix argument which is not passed to callee.
1433 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1434 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1435 return false; // argument slot count mismatch
1436 }
1437
1438 ciSignature* linker_sig = linker->signature();
1439 ciSignature* target_sig = target->signature();
1440
1441 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1442 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1443 return false; // argument count mismatch
1444 }
1445
1446 int sbase = 0, rbase = 0;
1447 switch (linker->intrinsic_id()) {
1448 case vmIntrinsics::_linkToVirtual:
1449 case vmIntrinsics::_linkToInterface:
1450 case vmIntrinsics::_linkToSpecial: {
1451 if (target->is_static()) {
1452 return false;
1453 }
1454 if (linker_sig->type_at(0)->is_primitive_type()) {
1455 return false; // receiver should be an oop
1456 }
1457 sbase = 1; // skip receiver
1458 break;
1459 }
1460 case vmIntrinsics::_linkToStatic: {
1461 if (!target->is_static()) {
1462 return false;
1463 }
1464 break;
1465 }
1466 case vmIntrinsics::_invokeBasic: {
1467 if (target->is_static()) {
1468 if (target_sig->type_at(0)->is_primitive_type()) {
1469 return false; // receiver should be an oop
1470 }
1471 rbase = 1; // skip receiver
1472 }
1473 break;
1474 }
1475 default:
1476 break;
1477 }
1478 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1479 int arg_count = target_sig->count() - rbase;
1480 for (int i = 0; i < arg_count; i++) {
1481 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1482 return false;
1483 }
1484 }
1485 // Only check the return type if the symbolic info has non-void return type.
1486 // I.e. the return value of the resolved method can be dropped.
1487 if (!linker->return_type()->is_void() &&
1488 !basic_types_match(linker->return_type(), target->return_type())) {
1489 return false;
1490 }
1491 return true; // no mismatch found
1492 }
1493
1494 // ------------------------------------------------------------------
1495 // ciMethod::is_old
1496 //
1497 // Return true for redefined methods
1498 bool ciMethod::is_old() const {
1499 ASSERT_IN_VM;
1500 return get_Method()->is_old();
1501 }