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 "runtime/sharedRuntime.hpp"
55 #include "utilities/bitMap.inline.hpp"
56 #include "utilities/xmlstream.hpp"
57 #ifdef COMPILER2
58 #include "ci/bcEscapeAnalyzer.hpp"
59 #include "ci/ciTypeFlow.hpp"
60 #include "oops/method.hpp"
61 #endif
62
63 // ciMethod
64 //
65 // This class represents a Method* in the HotSpot virtual
66 // machine.
67
68
69 // ------------------------------------------------------------------
70 // ciMethod::ciMethod
71 //
72 // Loaded method.
73 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
74 ciMetadata(h_m()),
75 _holder(holder)
76 {
77 assert(h_m() != nullptr, "no null method");
78 assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
79
80 // These fields are always filled in in loaded methods.
81 _flags = ciFlags(h_m->access_flags());
82
83 // Easy to compute, so fill them in now.
84 _max_stack = h_m->max_stack();
85 _max_locals = h_m->max_locals();
86 _code_size = h_m->code_size();
87 _handler_count = h_m->exception_table_length();
88 _size_of_parameters = h_m->size_of_parameters();
89 _uses_monitors = h_m->has_monitor_bytecodes();
90 _balanced_monitors = !_uses_monitors || h_m->guaranteed_monitor_matching();
91 _is_c1_compilable = !h_m->is_not_c1_compilable();
92 _is_c2_compilable = !h_m->is_not_c2_compilable();
93 _can_be_parsed = true;
94 _has_reserved_stack_access = h_m->has_reserved_stack_access();
95 _is_overpass = h_m->is_overpass();
96 // Lazy fields, filled in on demand. Require allocation.
97 _code = nullptr;
98 _exception_handlers = nullptr;
99 _liveness = nullptr;
100 _method_blocks = nullptr;
101 #if defined(COMPILER2)
102 _flow = nullptr;
103 _bcea = nullptr;
104 #endif // COMPILER2
105
106 // Check for blackhole intrinsic and then populate the intrinsic ID.
107 CompilerOracle::tag_blackhole_if_possible(h_m);
108 _intrinsic_id = h_m->intrinsic_id();
109
110 ciEnv *env = CURRENT_ENV;
111 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
112 // 6328518 check hotswap conditions under the right lock.
113 bool should_take_Compile_lock = !Compile_lock->owned_by_self();
114 ConditionalMutexLocker locker(Compile_lock, should_take_Compile_lock, Mutex::_safepoint_check_flag);
115 if (Dependencies::check_evol_method(h_m()) != nullptr) {
116 _is_c1_compilable = false;
117 _is_c2_compilable = false;
118 _can_be_parsed = false;
119 }
120 } else {
121 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
122 }
123
124 if (h_m->method_holder()->is_linked()) {
125 _can_be_statically_bound = h_m->can_be_statically_bound();
126 _can_omit_stack_trace = h_m->can_omit_stack_trace();
127 } else {
128 // Have to use a conservative value in this case.
129 _can_be_statically_bound = false;
130 _can_omit_stack_trace = true;
131 }
132
133 // Adjust the definition of this condition to be more useful:
134 // %%% take these conditions into account in vtable generation
135 if (!_can_be_statically_bound && h_m->is_private())
136 _can_be_statically_bound = true;
137 if (_can_be_statically_bound && h_m->is_abstract())
138 _can_be_statically_bound = false;
139
140 // generating _signature may allow GC and therefore move m.
141 // These fields are always filled in.
142 _name = env->get_symbol(h_m->name());
143 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
144 constantPoolHandle cpool(Thread::current(), h_m->constants());
145 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
146 _method_data = nullptr;
147 // Take a snapshot of these values, so they will be commensurate with the MDO.
148 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
149 int invcnt = h_m->interpreter_invocation_count();
150 // if the value overflowed report it as max int
151 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
152 _interpreter_throwout_count = h_m->interpreter_throwout_count();
153 } else {
154 _interpreter_invocation_count = 0;
155 _interpreter_throwout_count = 0;
156 }
157 if (_interpreter_invocation_count == 0)
158 _interpreter_invocation_count = 1;
159 _inline_instructions_size = -1;
160 if (ReplayCompiles) {
161 ciReplay::initialize(this);
162 }
163 }
164
165
166 // ------------------------------------------------------------------
167 // ciMethod::ciMethod
168 //
169 // Unloaded method.
170 ciMethod::ciMethod(ciInstanceKlass* holder,
171 ciSymbol* name,
172 ciSymbol* signature,
173 ciInstanceKlass* accessor) :
174 ciMetadata((Metadata*)nullptr),
175 _name( name),
176 _holder( holder),
177 _method_data( nullptr),
178 _method_blocks( nullptr),
179 _intrinsic_id( vmIntrinsics::_none),
180 _inline_instructions_size(-1),
181 _can_be_statically_bound(false),
182 _can_omit_stack_trace(true),
183 _liveness( nullptr)
184 #if defined(COMPILER2)
185 ,
186 _flow( nullptr),
187 _bcea( nullptr)
188 #endif // COMPILER2
189 {
190 // Usually holder and accessor are the same type but in some cases
191 // the holder has the wrong class loader (e.g. invokedynamic call
192 // sites) so we pass the accessor.
193 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
194 }
195
196
197 // ------------------------------------------------------------------
198 // ciMethod::load_code
199 //
200 // Load the bytecodes and exception handler table for this method.
201 void ciMethod::load_code() {
202 VM_ENTRY_MARK;
203 assert(is_loaded(), "only loaded methods have code");
204
205 Method* me = get_Method();
206 Arena* arena = CURRENT_THREAD_ENV->arena();
207
208 // Load the bytecodes.
209 _code = (address)arena->Amalloc(code_size());
210 memcpy(_code, me->code_base(), code_size());
211
212 #if INCLUDE_JVMTI
213 // Revert any breakpoint bytecodes in ci's copy
214 if (me->number_of_breakpoints() > 0) {
215 BreakpointInfo* bp = me->method_holder()->breakpoints();
216 for (; bp != nullptr; bp = bp->next()) {
217 if (bp->match(me)) {
218 code_at_put(bp->bci(), bp->orig_bytecode());
219 }
220 }
221 }
222 #endif
223
224 // And load the exception table.
225 ExceptionTable exc_table(me);
226
227 // Allocate one extra spot in our list of exceptions. This
228 // last entry will be used to represent the possibility that
229 // an exception escapes the method. See ciExceptionHandlerStream
230 // for details.
231 _exception_handlers =
232 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
233 * (_handler_count + 1));
234 if (_handler_count > 0) {
235 for (int i=0; i<_handler_count; i++) {
236 _exception_handlers[i] = new (arena) ciExceptionHandler(
237 holder(),
238 /* start */ exc_table.start_pc(i),
239 /* limit */ exc_table.end_pc(i),
240 /* goto pc */ exc_table.handler_pc(i),
241 /* cp index */ exc_table.catch_type_index(i));
242 }
243 }
244
245 // Put an entry at the end of our list to represent the possibility
246 // of exceptional exit.
247 _exception_handlers[_handler_count] =
248 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
249
250 if (CIPrintMethodCodes) {
251 print_codes();
252 }
253 }
254
255
256 // ------------------------------------------------------------------
257 // ciMethod::has_linenumber_table
258 //
259 // length unknown until decompression
260 bool ciMethod::has_linenumber_table() const {
261 check_is_loaded();
262 VM_ENTRY_MARK;
263 return get_Method()->has_linenumber_table();
264 }
265
266
267 // ------------------------------------------------------------------
268 // ciMethod::line_number_from_bci
269 int ciMethod::line_number_from_bci(int bci) const {
270 check_is_loaded();
271 VM_ENTRY_MARK;
272 return get_Method()->line_number_from_bci(bci);
273 }
274
275
276 // ------------------------------------------------------------------
277 // ciMethod::vtable_index
278 //
279 // Get the position of this method's entry in the vtable, if any.
280 int ciMethod::vtable_index() {
281 check_is_loaded();
282 assert(holder()->is_linked(), "must be linked");
283 VM_ENTRY_MARK;
284 return get_Method()->vtable_index();
285 }
286
287 // ------------------------------------------------------------------
288 // ciMethod::uses_balanced_monitors
289 //
290 // Does this method use monitors in a strict stack-disciplined manner?
291 bool ciMethod::has_balanced_monitors() {
292 check_is_loaded();
293 if (_balanced_monitors) return true;
294
295 // Analyze the method to see if monitors are used properly.
296 VM_ENTRY_MARK;
297 methodHandle method(THREAD, get_Method());
298 assert(method->has_monitor_bytecodes(), "should have checked this");
299
300 // Check to see if a previous compilation computed the
301 // monitor-matching analysis.
302 if (method->guaranteed_monitor_matching()) {
303 _balanced_monitors = true;
304 return true;
305 }
306
307 {
308 ExceptionMark em(THREAD);
309 ResourceMark rm(THREAD);
310 GeneratePairingInfo gpi(method);
311 if (!gpi.compute_map(THREAD)) {
312 fatal("Unrecoverable verification or out-of-memory error");
313 }
314 if (!gpi.monitor_safe()) {
315 return false;
316 }
317 method->set_guaranteed_monitor_matching();
318 _balanced_monitors = true;
319 }
320 return true;
321 }
322
323
324 // ------------------------------------------------------------------
325 // ciMethod::get_flow_analysis
326 ciTypeFlow* ciMethod::get_flow_analysis() {
327 #if defined(COMPILER2)
328 if (_flow == nullptr) {
329 ciEnv* env = CURRENT_ENV;
330 _flow = new (env->arena()) ciTypeFlow(env, this);
331 _flow->do_flow();
332 }
333 return _flow;
334 #else // COMPILER2
335 ShouldNotReachHere();
336 return nullptr;
337 #endif // COMPILER2
338 }
339
340
341 // ------------------------------------------------------------------
342 // ciMethod::get_osr_flow_analysis
343 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
344 #if defined(COMPILER2)
345 // OSR entry points are always place after a call bytecode of some sort
346 assert(osr_bci >= 0, "must supply valid OSR entry point");
347 ciEnv* env = CURRENT_ENV;
348 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
349 flow->do_flow();
350 return flow;
351 #else // COMPILER2
352 ShouldNotReachHere();
353 return nullptr;
354 #endif // COMPILER2
355 }
356
357 // ------------------------------------------------------------------
358 // ciMethod::raw_liveness_at_bci
359 //
360 // Which local variables are live at a specific bci?
361 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
362 check_is_loaded();
363 if (_liveness == nullptr) {
364 // Create the liveness analyzer.
365 Arena* arena = CURRENT_ENV->arena();
366 _liveness = new (arena) MethodLiveness(arena, this);
367 _liveness->compute_liveness();
368 }
369 return _liveness->get_liveness_at(bci);
370 }
371
372 // ------------------------------------------------------------------
373 // ciMethod::liveness_at_bci
374 //
375 // Which local variables are live at a specific bci? When debugging
376 // will return true for all locals in some cases to improve debug
377 // information.
378 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
379 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
380 // Keep all locals live for the user's edification and amusement.
381 MethodLivenessResult result(_max_locals);
382 result.set_range(0, _max_locals);
383 result.set_is_valid();
384 return result;
385 }
386 return raw_liveness_at_bci(bci);
387 }
388
389 // ciMethod::live_local_oops_at_bci
390 //
391 // find all the live oops in the locals array for a particular bci
392 // Compute what the interpreter believes by using the interpreter
393 // oopmap generator. This is used as a double check during osr to
394 // guard against conservative result from MethodLiveness making us
395 // think a dead oop is live. MethodLiveness is conservative in the
396 // sense that it may consider locals to be live which cannot be live,
397 // like in the case where a local could contain an oop or a primitive
398 // along different paths. In that case the local must be dead when
399 // those paths merge. Since the interpreter's viewpoint is used when
400 // gc'ing an interpreter frame we need to use its viewpoint during
401 // OSR when loading the locals.
402
403 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
404 VM_ENTRY_MARK;
405 InterpreterOopMap mask;
406 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
407 int mask_size = max_locals();
408 ResourceBitMap result(mask_size);
409 int i;
410 for (i = 0; i < mask_size ; i++ ) {
411 if (mask.is_oop(i)) result.set_bit(i);
412 }
413 return result;
414 }
415
416
417 #ifdef COMPILER1
418 // ------------------------------------------------------------------
419 // ciMethod::bci_block_start
420 //
421 // Marks all bcis where a new basic block starts
422 const BitMap& ciMethod::bci_block_start() {
423 check_is_loaded();
424 if (_liveness == nullptr) {
425 // Create the liveness analyzer.
426 Arena* arena = CURRENT_ENV->arena();
427 _liveness = new (arena) MethodLiveness(arena, this);
428 _liveness->compute_liveness();
429 }
430
431 return _liveness->get_bci_block_start();
432 }
433 #endif // COMPILER1
434
435
436 // ------------------------------------------------------------------
437 // ciMethod::check_overflow
438 //
439 // Check whether the profile counter is overflowed and adjust if true.
440 // For invoke* it will turn negative values into max_jint,
441 // and for checkcast/aastore/instanceof turn positive values into min_jint.
442 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
443 switch (code) {
444 case Bytecodes::_aastore: // fall-through
445 case Bytecodes::_checkcast: // fall-through
446 case Bytecodes::_instanceof: {
447 if (VM_Version::profile_all_receivers_at_type_check()) {
448 return (c < 0 ? max_jint : c); // always non-negative
449 }
450 return (c > 0 ? min_jint : c); // always non-positive
451 }
452 default: {
453 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
454 return (c < 0 ? max_jint : c); // always non-negative
455 }
456 }
457 }
458
459
460 // ------------------------------------------------------------------
461 // ciMethod::call_profile_at_bci
462 //
463 // Get the ciCallProfile for the invocation of this method.
464 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
465 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
466 ResourceMark rm;
467 ciCallProfile result;
468 if (method_data() != nullptr && method_data()->is_mature()) {
469 ciProfileData* data = method_data()->bci_to_data(bci);
470 if (data != nullptr && data->is_CounterData()) {
471 // Every profiled call site has a counter.
472 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
473
474 if (!data->is_ReceiverTypeData()) {
475 result._receiver_count[0] = 0; // that's a definite zero
476 } else { // ReceiverTypeData is a subclass of CounterData
477 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
478 // In addition, virtual call sites have receiver type information
479 int receivers_count_total = 0;
480 int morphism = 0;
481 // Precompute morphism for the possible fixup
482 for (uint i = 0; i < call->row_limit(); i++) {
483 ciKlass* receiver = call->receiver(i);
484 if (receiver == nullptr) continue;
485 morphism++;
486 }
487 int epsilon = 0;
488 // For a call, it is assumed that either the type of the receiver(s)
489 // is recorded or an associated counter is incremented, but not both. With
490 // tiered compilation, however, both can happen due to the interpreter and
491 // C1 profiling invocations differently. Address that inconsistency here.
492 if (morphism == 1 && count > 0) {
493 epsilon = count;
494 count = 0;
495 }
496 for (uint i = 0; i < call->row_limit(); i++) {
497 ciKlass* receiver = call->receiver(i);
498 if (receiver == nullptr) continue;
499 int rcount = saturated_add(call->receiver_count(i), epsilon);
500 if (rcount == 0) rcount = 1; // Should be valid value
501 receivers_count_total = saturated_add(receivers_count_total, rcount);
502 // Add the receiver to result data.
503 result.add_receiver(receiver, rcount);
504 // If we extend profiling to record methods,
505 // we will set result._method also.
506 }
507 // Determine call site's morphism.
508 // The call site count is 0 with known morphism (only 1 or 2 receivers)
509 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
510 // The call site count is > 0 in the case of a polymorphic virtual call.
511 if (morphism > 0 && morphism == result._limit) {
512 // The morphism <= MorphismLimit.
513 if ((morphism < ciCallProfile::MorphismLimit) ||
514 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
515 #ifdef ASSERT
516 if (count > 0) {
517 this->print_short_name(tty);
518 tty->print_cr(" @ bci:%d", bci);
519 this->print_codes();
520 assert(false, "this call site should not be polymorphic");
521 }
522 #endif
523 result._morphism = morphism;
524 }
525 }
526 // Make the count consistent if this is a call profile. If count is
527 // zero or less, presume that this is a typecheck profile and
528 // do nothing. Otherwise, increase count to be the sum of all
529 // receiver's counts.
530 if (count >= 0) {
531 count = saturated_add(count, receivers_count_total);
532 }
533 }
534 result._count = count;
535 }
536 }
537 return result;
538 }
539
540 // ------------------------------------------------------------------
541 // Add new receiver and sort data by receiver's profile count.
542 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
543 // Add new receiver and sort data by receiver's counts when we have space
544 // for it otherwise replace the less called receiver (less called receiver
545 // is placed to the last array element which is not used).
546 // First array's element contains most called receiver.
547 int i = _limit;
548 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
549 _receiver[i] = _receiver[i-1];
550 _receiver_count[i] = _receiver_count[i-1];
551 }
552 _receiver[i] = receiver;
553 _receiver_count[i] = receiver_count;
554 if (_limit < MorphismLimit) _limit++;
555 }
556
557
558 void ciMethod::assert_virtual_call_type_ok(int bci) {
559 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
560 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
561 }
562
563 void ciMethod::assert_call_type_ok(int bci) {
564 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
565 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
566 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
567 }
568
569 /**
570 * Check whether profiling provides a type for the argument i to the
571 * call at bci bci
572 *
573 * @param [in]bci bci of the call
574 * @param [in]i argument number
575 * @param [out]type profiled type of argument, null if none
576 * @param [out]ptr_kind whether always null, never null or maybe null
577 * @return true if profiling exists
578 *
579 */
580 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
581 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
582 ciProfileData* data = method_data()->bci_to_data(bci);
583 if (data != nullptr) {
584 if (data->is_VirtualCallTypeData()) {
585 assert_virtual_call_type_ok(bci);
586 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
587 if (i >= call->number_of_arguments()) {
588 return false;
589 }
590 type = call->valid_argument_type(i);
591 ptr_kind = call->argument_ptr_kind(i);
592 return true;
593 } else if (data->is_CallTypeData()) {
594 assert_call_type_ok(bci);
595 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
596 if (i >= call->number_of_arguments()) {
597 return false;
598 }
599 type = call->valid_argument_type(i);
600 ptr_kind = call->argument_ptr_kind(i);
601 return true;
602 }
603 }
604 }
605 return false;
606 }
607
608 /**
609 * Check whether profiling provides a type for the return value from
610 * the call at bci bci
611 *
612 * @param [in]bci bci of the call
613 * @param [out]type profiled type of argument, null if none
614 * @param [out]ptr_kind whether always null, never null or maybe null
615 * @return true if profiling exists
616 *
617 */
618 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
619 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) {
620 ciProfileData* data = method_data()->bci_to_data(bci);
621 if (data != nullptr) {
622 if (data->is_VirtualCallTypeData()) {
623 assert_virtual_call_type_ok(bci);
624 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
625 if (call->has_return()) {
626 type = call->valid_return_type();
627 ptr_kind = call->return_ptr_kind();
628 return true;
629 }
630 } else if (data->is_CallTypeData()) {
631 assert_call_type_ok(bci);
632 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
633 if (call->has_return()) {
634 type = call->valid_return_type();
635 ptr_kind = call->return_ptr_kind();
636 }
637 return true;
638 }
639 }
640 }
641 return false;
642 }
643
644 /**
645 * Check whether profiling provides a type for the parameter i
646 *
647 * @param [in]i parameter number
648 * @param [out]type profiled type of parameter, null if none
649 * @param [out]ptr_kind whether always null, never null or maybe null
650 * @return true if profiling exists
651 *
652 */
653 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
654 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) {
655 ciParametersTypeData* parameters = method_data()->parameters_type_data();
656 if (parameters != nullptr && i < parameters->number_of_parameters()) {
657 type = parameters->valid_parameter_type(i);
658 ptr_kind = parameters->parameter_ptr_kind(i);
659 return true;
660 }
661 }
662 return false;
663 }
664
665 bool ciMethod::array_access_profiled_type(int bci, ciKlass*& array_type, ciKlass*& element_type, ProfilePtrKind& element_ptr, bool &flat_array, bool &null_free_array) {
666 if (method_data() != nullptr && method_data()->is_mature()) {
667 ciProfileData* data = method_data()->bci_to_data(bci);
668 if (data != nullptr) {
669 if (data->is_ArrayLoadData()) {
670 ciArrayLoadData* array_access = (ciArrayLoadData*) data->as_ArrayLoadData();
671 array_type = array_access->array()->valid_type();
672 element_type = array_access->element()->valid_type();
673 element_ptr = array_access->element()->ptr_kind();
674 flat_array = array_access->flat_array();
675 null_free_array = array_access->null_free_array();
676 return true;
677 } else if (data->is_ArrayStoreData()) {
678 ciArrayStoreData* array_access = (ciArrayStoreData*) data->as_ArrayStoreData();
679 array_type = array_access->array()->valid_type();
680 flat_array = array_access->flat_array();
681 null_free_array = array_access->null_free_array();
682 ciCallProfile call_profile = call_profile_at_bci(bci);
683 if (call_profile.morphism() == 1) {
684 element_type = call_profile.receiver(0);
685 } else {
686 element_type = nullptr;
687 }
688 if (!array_access->null_seen()) {
689 element_ptr = ProfileNeverNull;
690 } else if (call_profile.count() == 0) {
691 element_ptr = ProfileAlwaysNull;
692 } else {
693 element_ptr = ProfileMaybeNull;
694 }
695 return true;
696 }
697 }
698 }
699 return false;
700 }
701
702 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) {
703 if (method_data() != nullptr && method_data()->is_mature()) {
704 ciProfileData* data = method_data()->bci_to_data(bci);
705 if (data != nullptr && data->is_ACmpData()) {
706 ciACmpData* acmp = (ciACmpData*)data->as_ACmpData();
707 left_type = acmp->left()->valid_type();
708 right_type = acmp->right()->valid_type();
709 left_ptr = acmp->left()->ptr_kind();
710 right_ptr = acmp->right()->ptr_kind();
711 left_inline_type = acmp->left_inline_type();
712 right_inline_type = acmp->right_inline_type();
713 return true;
714 }
715 }
716 return false;
717 }
718
719
720 // ------------------------------------------------------------------
721 // ciMethod::find_monomorphic_target
722 //
723 // Given a certain calling environment, find the monomorphic target
724 // for the call. Return null if the call is not monomorphic in
725 // its calling environment, or if there are only abstract methods.
726 // The returned method is never abstract.
727 // Note: If caller uses a non-null result, it must inform dependencies
728 // via assert_unique_concrete_method or assert_leaf_type.
729 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
730 ciInstanceKlass* callee_holder,
731 ciInstanceKlass* actual_recv,
732 bool check_access) {
733 check_is_loaded();
734
735 if (actual_recv->is_interface()) {
736 // %%% We cannot trust interface types, yet. See bug 6312651.
737 return nullptr;
738 }
739
740 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
741 if (root_m == nullptr) {
742 // Something went wrong looking up the actual receiver method.
743 return nullptr;
744 }
745
746 // Make certain quick checks even if UseCHA is false.
747
748 // Is it private or final?
749 if (root_m->can_be_statically_bound()) {
750 assert(!root_m->is_abstract(), "sanity");
751 return root_m;
752 }
753
754 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
755 // Easy case. There is no other place to put a method, so don't bother
756 // to go through the VM_ENTRY_MARK and all the rest.
757 if (root_m->is_abstract()) {
758 return nullptr;
759 }
760 return root_m;
761 }
762
763 // Array methods (clone, hashCode, etc.) are always statically bound.
764 // If we were to see an array type here, we'd return root_m.
765 // However, this method processes only ciInstanceKlasses. (See 4962591.)
766 // The inline_native_clone intrinsic narrows Object to T[] properly,
767 // so there is no need to do the same job here.
768
769 if (!UseCHA) return nullptr;
770
771 VM_ENTRY_MARK;
772
773 methodHandle target;
774 {
775 MutexLocker locker(Compile_lock);
776 InstanceKlass* context = actual_recv->get_instanceKlass();
777 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
778 root_m->get_Method(),
779 callee_holder->get_Klass(),
780 this->get_Method()));
781 assert(target() == nullptr || !target()->is_abstract(), "not allowed");
782 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
783 }
784
785 #ifndef PRODUCT
786 LogTarget(Debug, dependencies) lt;
787 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) {
788 LogStream ls(<);
789 ls.print("found a non-root unique target method");
790 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name());
791 ls.print(" method = ");
792 target->print_short_name(&ls);
793 ls.cr();
794 }
795 #endif //PRODUCT
796
797 if (target() == nullptr) {
798 return nullptr;
799 }
800 if (target() == root_m->get_Method()) {
801 return root_m;
802 }
803 if (!root_m->is_public() &&
804 !root_m->is_protected()) {
805 // If we are going to reason about inheritance, it's easiest
806 // if the method in question is public, protected, or private.
807 // If the answer is not root_m, it is conservatively correct
808 // to return null, even if the CHA encountered irrelevant
809 // methods in other packages.
810 // %%% TO DO: Work out logic for package-private methods
811 // with the same name but different vtable indexes.
812 return nullptr;
813 }
814 return CURRENT_THREAD_ENV->get_method(target());
815 }
816
817 // ------------------------------------------------------------------
818 // ciMethod::can_be_statically_bound
819 //
820 // Tries to determine whether a method can be statically bound in some context.
821 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
822 return (holder() == context) && can_be_statically_bound();
823 }
824
825 // ------------------------------------------------------------------
826 // ciMethod::can_omit_stack_trace
827 //
828 // Tries to determine whether a method can omit stack trace in throw in compiled code.
829 bool ciMethod::can_omit_stack_trace() const {
830 if (!StackTraceInThrowable) {
831 return true; // stack trace is switched off.
832 }
833 if (!OmitStackTraceInFastThrow) {
834 return false; // Have to provide stack trace.
835 }
836 return _can_omit_stack_trace;
837 }
838
839 // ------------------------------------------------------------------
840 // ciMethod::equals
841 //
842 // Returns true if the methods are the same, taking redefined methods
843 // into account.
844 bool ciMethod::equals(const ciMethod* m) const {
845 if (this == m) return true;
846 VM_ENTRY_MARK;
847 Method* m1 = this->get_Method();
848 Method* m2 = m->get_Method();
849 if (m1->is_old()) m1 = m1->get_new_method();
850 if (m2->is_old()) m2 = m2->get_new_method();
851 return m1 == m2;
852 }
853
854
855 // ------------------------------------------------------------------
856 // ciMethod::resolve_invoke
857 //
858 // Given a known receiver klass, find the target for the call.
859 // Return null if the call has no target or the target is abstract.
860 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
861 check_is_loaded();
862 VM_ENTRY_MARK;
863
864 Klass* caller_klass = caller->get_Klass();
865 Klass* recv = exact_receiver->get_Klass();
866 Klass* resolved = holder()->get_Klass();
867 Symbol* h_name = name()->get_symbol();
868 Symbol* h_signature = signature()->get_symbol();
869
870 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
871 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
872 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
873 Method* m = nullptr;
874 // Only do exact lookup if receiver klass has been linked. Otherwise,
875 // the vtable has not been setup, and the LinkResolver will fail.
876 if (recv->is_array_klass()
877 ||
878 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
879 if (holder()->is_interface()) {
880 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
881 } else {
882 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
883 }
884 }
885
886 if (m == nullptr) {
887 // Return null only if there was a problem with lookup (uninitialized class, etc.)
888 return nullptr;
889 }
890
891 ciMethod* result = this;
892 if (m != get_Method()) {
893 result = CURRENT_THREAD_ENV->get_method(m);
894 }
895
896 if (result->is_abstract() && !allow_abstract) {
897 // Don't return abstract methods because they aren't optimizable or interesting.
898 return nullptr;
899 }
900 return result;
901 }
902
903 // ------------------------------------------------------------------
904 // ciMethod::resolve_vtable_index
905 //
906 // Given a known receiver klass, find the vtable index for the call.
907 // Return Method::invalid_vtable_index if the vtable_index is unknown.
908 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
909 check_is_loaded();
910
911 int vtable_index = Method::invalid_vtable_index;
912 // Only do lookup if receiver klass has been linked. Otherwise,
913 // the vtable has not been setup, and the LinkResolver will fail.
914 if (!receiver->is_interface()
915 && (!receiver->is_instance_klass() ||
916 receiver->as_instance_klass()->is_linked())) {
917 VM_ENTRY_MARK;
918
919 Klass* caller_klass = caller->get_Klass();
920 Klass* recv = receiver->get_Klass();
921 Symbol* h_name = name()->get_symbol();
922 Symbol* h_signature = signature()->get_symbol();
923
924 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
925 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
926 if (vtable_index == Method::nonvirtual_vtable_index) {
927 // A statically bound method. Return "no such index".
928 vtable_index = Method::invalid_vtable_index;
929 }
930 }
931
932 return vtable_index;
933 }
934
935 // ------------------------------------------------------------------
936 // ciMethod::get_field_at_bci
937 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
938 ciBytecodeStream iter(this);
939 iter.reset_to_bci(bci);
940 iter.next();
941 return iter.get_field(will_link);
942 }
943
944 // ------------------------------------------------------------------
945 // ciMethod::get_method_at_bci
946 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
947 ciBytecodeStream iter(this);
948 iter.reset_to_bci(bci);
949 iter.next();
950 return iter.get_method(will_link, declared_signature);
951 }
952
953 // ------------------------------------------------------------------
954 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
955 ciBytecodeStream iter(this);
956 iter.reset_to_bci(bci);
957 iter.next();
958 return iter.get_declared_method_holder();
959 }
960
961 // ------------------------------------------------------------------
962 // Adjust a CounterData count to be commensurate with
963 // interpreter_invocation_count. If the MDO exists for
964 // only 25% of the time the method exists, then the
965 // counts in the MDO should be scaled by 4X, so that
966 // they can be usefully and stably compared against the
967 // invocation counts in methods.
968 int ciMethod::scale_count(int count, float prof_factor) {
969 if (count > 0 && method_data() != nullptr) {
970 int counter_life = method_data()->invocation_count();
971 int method_life = interpreter_invocation_count();
972 if (method_life < counter_life) { // may happen because of the snapshot timing
973 method_life = counter_life;
974 }
975 if (counter_life > 0) {
976 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
977 count = (count > 0) ? count : 1;
978 } else {
979 count = 1;
980 }
981 }
982 return count;
983 }
984
985
986 // ------------------------------------------------------------------
987 // ciMethod::is_special_get_caller_class_method
988 //
989 bool ciMethod::is_ignored_by_security_stack_walk() const {
990 check_is_loaded();
991 VM_ENTRY_MARK;
992 return get_Method()->is_ignored_by_security_stack_walk();
993 }
994
995 // ------------------------------------------------------------------
996 // ciMethod::needs_clinit_barrier
997 //
998 bool ciMethod::needs_clinit_barrier() const {
999 check_is_loaded();
1000 return is_static() && !holder()->is_initialized();
1001 }
1002
1003 // ------------------------------------------------------------------
1004 // invokedynamic support
1005
1006 // ------------------------------------------------------------------
1007 // ciMethod::is_method_handle_intrinsic
1008 //
1009 // Return true if the method is an instance of the JVM-generated
1010 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
1011 bool ciMethod::is_method_handle_intrinsic() const {
1012 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1013 return (MethodHandles::is_signature_polymorphic(iid) &&
1014 MethodHandles::is_signature_polymorphic_intrinsic(iid));
1015 }
1016
1017 // ------------------------------------------------------------------
1018 // ciMethod::is_compiled_lambda_form
1019 //
1020 // Return true if the method is a generated MethodHandle adapter.
1021 // These are built by Java code.
1022 bool ciMethod::is_compiled_lambda_form() const {
1023 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1024 return iid == vmIntrinsics::_compiledLambdaForm;
1025 }
1026
1027 // ------------------------------------------------------------------
1028 // ciMethod::is_object_constructor
1029 //
1030 bool ciMethod::is_object_constructor() const {
1031 return (name() == ciSymbols::object_initializer_name()
1032 && signature()->return_type()->is_void());
1033 // Note: We can't test is_static, because that would
1034 // require the method to be loaded. Sometimes it isn't.
1035 }
1036
1037 // ------------------------------------------------------------------
1038 // ciMethod::is_scoped
1039 //
1040 // Return true for methods annotated with @Scoped
1041 bool ciMethod::is_scoped() const {
1042 return get_Method()->is_scoped();
1043 }
1044
1045 // ------------------------------------------------------------------
1046 // ciMethod::has_member_arg
1047 //
1048 // Return true if the method is a linker intrinsic like _linkToVirtual.
1049 // These are built by the JVM.
1050 bool ciMethod::has_member_arg() const {
1051 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1052 return (MethodHandles::is_signature_polymorphic(iid) &&
1053 MethodHandles::has_member_arg(iid));
1054 }
1055
1056 // ------------------------------------------------------------------
1057 // ciMethod::ensure_method_data
1058 //
1059 // Generate new MethodData* objects at compile time.
1060 // Return true if allocation was successful or no MDO is required.
1061 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1062 EXCEPTION_CONTEXT;
1063 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1064 return true;
1065 }
1066 if (h_m()->method_data() == nullptr) {
1067 Method::build_profiling_method_data(h_m, THREAD);
1068 if (HAS_PENDING_EXCEPTION) {
1069 CLEAR_PENDING_EXCEPTION;
1070 }
1071 }
1072 if (h_m()->method_data() != nullptr) {
1073 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1074 return _method_data->load_data();
1075 } else {
1076 _method_data = CURRENT_ENV->get_empty_methodData();
1077 return false;
1078 }
1079 }
1080
1081 // public, retroactive version
1082 bool ciMethod::ensure_method_data() {
1083 bool result = true;
1084 if (_method_data == nullptr || _method_data->is_empty()) {
1085 GUARDED_VM_ENTRY({
1086 methodHandle mh(Thread::current(), get_Method());
1087 result = ensure_method_data(mh);
1088 });
1089 }
1090 return result;
1091 }
1092
1093
1094 // ------------------------------------------------------------------
1095 // ciMethod::method_data
1096 //
1097 ciMethodData* ciMethod::method_data() {
1098 if (_method_data != nullptr) {
1099 return _method_data;
1100 }
1101 VM_ENTRY_MARK;
1102 ciEnv* env = CURRENT_ENV;
1103 Thread* my_thread = JavaThread::current();
1104 methodHandle h_m(my_thread, get_Method());
1105
1106 if (h_m()->method_data() != nullptr) {
1107 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1108 _method_data->load_data();
1109 } else {
1110 _method_data = CURRENT_ENV->get_empty_methodData();
1111 }
1112 return _method_data;
1113
1114 }
1115
1116 // ------------------------------------------------------------------
1117 // ciMethod::method_data_or_null
1118 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1119 // null otherwise.
1120 ciMethodData* ciMethod::method_data_or_null() {
1121 ciMethodData *md = method_data();
1122 if (md->is_empty()) {
1123 return nullptr;
1124 }
1125 return md;
1126 }
1127
1128 // ------------------------------------------------------------------
1129 // ciMethod::ensure_method_counters
1130 //
1131 MethodCounters* ciMethod::ensure_method_counters() {
1132 check_is_loaded();
1133 VM_ENTRY_MARK;
1134 methodHandle mh(THREAD, get_Method());
1135 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1136 return method_counters;
1137 }
1138
1139 // ------------------------------------------------------------------
1140 // ciMethod::has_option
1141 //
1142 bool ciMethod::has_option(CompileCommandEnum option) {
1143 check_is_loaded();
1144 VM_ENTRY_MARK;
1145 methodHandle mh(THREAD, get_Method());
1146 return CompilerOracle::has_option(mh, option);
1147 }
1148
1149 // ------------------------------------------------------------------
1150 // ciMethod::has_option_value
1151 //
1152 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) {
1153 check_is_loaded();
1154 VM_ENTRY_MARK;
1155 methodHandle mh(THREAD, get_Method());
1156 return CompilerOracle::has_option_value(mh, option, value);
1157 }
1158 // ------------------------------------------------------------------
1159 // ciMethod::can_be_compiled
1160 //
1161 // Have previous compilations of this method succeeded?
1162 bool ciMethod::can_be_compiled() {
1163 check_is_loaded();
1164 ciEnv* env = CURRENT_ENV;
1165 if (is_c1_compile(env->comp_level())) {
1166 return _is_c1_compilable;
1167 }
1168 return _is_c2_compilable;
1169 }
1170
1171 // ------------------------------------------------------------------
1172 // ciMethod::has_compiled_code
1173 bool ciMethod::has_compiled_code() {
1174 return inline_instructions_size() > 0;
1175 }
1176
1177 int ciMethod::highest_osr_comp_level() {
1178 check_is_loaded();
1179 VM_ENTRY_MARK;
1180 return get_Method()->highest_osr_comp_level();
1181 }
1182
1183 // ------------------------------------------------------------------
1184 // ciMethod::code_size_for_inlining
1185 //
1186 // Code size for inlining decisions. This method returns a code
1187 // size of 1 for methods which has the ForceInline annotation.
1188 int ciMethod::code_size_for_inlining() {
1189 check_is_loaded();
1190 if (get_Method()->force_inline()) {
1191 return 1;
1192 }
1193 return code_size();
1194 }
1195
1196 // ------------------------------------------------------------------
1197 // ciMethod::inline_instructions_size
1198 //
1199 // This is a rough metric for "fat" methods, compared before inlining
1200 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1201 // junk like exception handler, stubs, and constant table, which are
1202 // not highly relevant to an inlined method. So we use the more
1203 // specific accessor nmethod::insts_size.
1204 // Also some instructions inside the code are excluded from inline
1205 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter)
1206 int ciMethod::inline_instructions_size() {
1207 if (_inline_instructions_size == -1) {
1208 GUARDED_VM_ENTRY(
1209 nmethod* code = get_Method()->code();
1210 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) {
1211 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size();
1212 _inline_instructions_size = isize > 0 ? isize : 0;
1213 } else {
1214 _inline_instructions_size = 0;
1215 }
1216 );
1217 }
1218 return _inline_instructions_size;
1219 }
1220
1221 // ------------------------------------------------------------------
1222 // ciMethod::log_nmethod_identity
1223 void ciMethod::log_nmethod_identity(xmlStream* log) {
1224 GUARDED_VM_ENTRY(
1225 nmethod* code = get_Method()->code();
1226 if (code != nullptr) {
1227 code->log_identity(log);
1228 }
1229 )
1230 }
1231
1232 // ------------------------------------------------------------------
1233 // ciMethod::is_not_reached
1234 bool ciMethod::is_not_reached(int bci) {
1235 check_is_loaded();
1236 VM_ENTRY_MARK;
1237 return Interpreter::is_not_reached(
1238 methodHandle(THREAD, get_Method()), bci);
1239 }
1240
1241 // ------------------------------------------------------------------
1242 // ciMethod::was_never_executed
1243 bool ciMethod::was_executed_more_than(int times) {
1244 VM_ENTRY_MARK;
1245 return get_Method()->was_executed_more_than(times);
1246 }
1247
1248 // ------------------------------------------------------------------
1249 // ciMethod::has_unloaded_classes_in_signature
1250 bool ciMethod::has_unloaded_classes_in_signature() {
1251 // ciSignature is resolved against some accessing class and
1252 // signature classes aren't required to be local. As a benefit,
1253 // it makes signature classes visible through loader constraints.
1254 // So, encountering an unloaded class signals it is absent both in
1255 // the callee (local) and caller contexts.
1256 return signature()->has_unloaded_classes();
1257 }
1258
1259 // ------------------------------------------------------------------
1260 // ciMethod::is_klass_loaded
1261 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const {
1262 VM_ENTRY_MARK;
1263 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved);
1264 }
1265
1266 // ------------------------------------------------------------------
1267 // ciMethod::check_call
1268 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1269 // This method is used only in C2 from InlineTree::ok_to_inline,
1270 // and is only used under -Xcomp.
1271 // It appears to fail when applied to an invokeinterface call site.
1272 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1273 VM_ENTRY_MARK;
1274 {
1275 ExceptionMark em(THREAD);
1276 HandleMark hm(THREAD);
1277 constantPoolHandle pool (THREAD, get_Method()->constants());
1278 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1279 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1280 if (HAS_PENDING_EXCEPTION) {
1281 CLEAR_PENDING_EXCEPTION;
1282 return false;
1283 } else {
1284 return (spec_method->is_static() == is_static);
1285 }
1286 }
1287 return false;
1288 }
1289 // ------------------------------------------------------------------
1290 // ciMethod::print_codes
1291 //
1292 // Print the bytecodes for this method.
1293 void ciMethod::print_codes_on(outputStream* st) {
1294 check_is_loaded();
1295 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1296 }
1297
1298
1299 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1300 check_is_loaded(); \
1301 VM_ENTRY_MARK; \
1302 return get_Method()->flag_accessor(); \
1303 }
1304
1305 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1306 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1307 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1308 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1309 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1310 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1311
1312 bool ciMethod::is_boxing_method() const {
1313 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1314 switch (intrinsic_id()) {
1315 case vmIntrinsics::_Boolean_valueOf:
1316 case vmIntrinsics::_Byte_valueOf:
1317 case vmIntrinsics::_Character_valueOf:
1318 case vmIntrinsics::_Short_valueOf:
1319 case vmIntrinsics::_Integer_valueOf:
1320 case vmIntrinsics::_Long_valueOf:
1321 case vmIntrinsics::_Float_valueOf:
1322 case vmIntrinsics::_Double_valueOf:
1323 return true;
1324 default:
1325 return false;
1326 }
1327 }
1328 return false;
1329 }
1330
1331 bool ciMethod::is_unboxing_method() const {
1332 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1333 switch (intrinsic_id()) {
1334 case vmIntrinsics::_booleanValue:
1335 case vmIntrinsics::_byteValue:
1336 case vmIntrinsics::_charValue:
1337 case vmIntrinsics::_shortValue:
1338 case vmIntrinsics::_intValue:
1339 case vmIntrinsics::_longValue:
1340 case vmIntrinsics::_floatValue:
1341 case vmIntrinsics::_doubleValue:
1342 return true;
1343 default:
1344 return false;
1345 }
1346 }
1347 return false;
1348 }
1349
1350 bool ciMethod::is_vector_method() const {
1351 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1352 (intrinsic_id() != vmIntrinsics::_none);
1353 }
1354
1355 BCEscapeAnalyzer *ciMethod::get_bcea() {
1356 #ifdef COMPILER2
1357 if (_bcea == nullptr) {
1358 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr);
1359 }
1360 return _bcea;
1361 #else // COMPILER2
1362 ShouldNotReachHere();
1363 return nullptr;
1364 #endif // COMPILER2
1365 }
1366
1367 ciMethodBlocks *ciMethod::get_method_blocks() {
1368 if (_method_blocks == nullptr) {
1369 Arena *arena = CURRENT_ENV->arena();
1370 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1371 }
1372 return _method_blocks;
1373 }
1374
1375 #undef FETCH_FLAG_FROM_VM
1376
1377 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1378 st->print("%s %s %s",
1379 CURRENT_ENV->replay_name(method->method_holder()),
1380 method->name()->as_quoted_ascii(),
1381 method->signature()->as_quoted_ascii());
1382 }
1383
1384 void ciMethod::dump_name_as_ascii(outputStream* st) {
1385 Method* method = get_Method();
1386 dump_name_as_ascii(st, method);
1387 }
1388
1389 void ciMethod::dump_replay_data(outputStream* st) {
1390 ResourceMark rm;
1391 Method* method = get_Method();
1392 if (MethodHandles::is_signature_polymorphic_method(method)) {
1393 // ignore for now
1394 return;
1395 }
1396 MethodCounters* mcs = method->method_counters();
1397 st->print("ciMethod ");
1398 dump_name_as_ascii(st);
1399 st->print_cr(" %d %d %d %d %d",
1400 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(),
1401 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(),
1402 interpreter_invocation_count(),
1403 interpreter_throwout_count(),
1404 _inline_instructions_size);
1405 }
1406
1407 // ------------------------------------------------------------------
1408 // ciMethod::print_codes
1409 //
1410 // Print a range of the bytecodes for this method.
1411 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1412 check_is_loaded();
1413 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1414 }
1415
1416 // ------------------------------------------------------------------
1417 // ciMethod::print_name
1418 //
1419 // Print the name of this method, including signature and some flags.
1420 void ciMethod::print_name(outputStream* st) {
1421 check_is_loaded();
1422 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1423 }
1424
1425 // ------------------------------------------------------------------
1426 // ciMethod::print_short_name
1427 //
1428 // Print the name of this method, without signature.
1429 void ciMethod::print_short_name(outputStream* st) {
1430 if (is_loaded()) {
1431 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1432 } else {
1433 // Fall back if method is not loaded.
1434 holder()->print_name_on(st);
1435 st->print("::");
1436 name()->print_symbol_on(st);
1437 if (WizardMode)
1438 signature()->as_symbol()->print_symbol_on(st);
1439 }
1440 }
1441
1442 // ------------------------------------------------------------------
1443 // ciMethod::print_impl
1444 //
1445 // Implementation of the print method.
1446 void ciMethod::print_impl(outputStream* st) {
1447 ciMetadata::print_impl(st);
1448 st->print(" name=");
1449 name()->print_symbol_on(st);
1450 st->print(" holder=");
1451 holder()->print_name_on(st);
1452 st->print(" signature=");
1453 signature()->as_symbol()->print_symbol_on(st);
1454 if (is_loaded()) {
1455 st->print(" loaded=true");
1456 st->print(" arg_size=%d", arg_size());
1457 st->print(" flags=");
1458 flags().print_member_flags(st);
1459 } else {
1460 st->print(" loaded=false");
1461 }
1462 }
1463
1464 // ------------------------------------------------------------------
1465
1466 static BasicType erase_to_word_type(BasicType bt) {
1467 if (is_subword_type(bt)) return T_INT;
1468 if (is_reference_type(bt)) return T_OBJECT;
1469 return bt;
1470 }
1471
1472 static bool basic_types_match(ciType* t1, ciType* t2) {
1473 if (t1 == t2) return true;
1474 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1475 }
1476
1477 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1478 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1479 !resolved_method->is_method_handle_intrinsic();
1480
1481 if (!invoke_through_mh_intrinsic) {
1482 // Method name & descriptor should stay the same.
1483 // Signatures may reference unloaded types and thus they may be not strictly equal.
1484 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1485 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1486
1487 return (declared_method->name()->equals(resolved_method->name())) &&
1488 (declared_signature->equals(resolved_signature));
1489 }
1490
1491 ciMethod* linker = declared_method;
1492 ciMethod* target = resolved_method;
1493 // Linkers have appendix argument which is not passed to callee.
1494 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1495 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1496 return false; // argument slot count mismatch
1497 }
1498
1499 ciSignature* linker_sig = linker->signature();
1500 ciSignature* target_sig = target->signature();
1501
1502 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1503 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1504 return false; // argument count mismatch
1505 }
1506
1507 int sbase = 0, rbase = 0;
1508 switch (linker->intrinsic_id()) {
1509 case vmIntrinsics::_linkToVirtual:
1510 case vmIntrinsics::_linkToInterface:
1511 case vmIntrinsics::_linkToSpecial: {
1512 if (target->is_static()) {
1513 return false;
1514 }
1515 if (linker_sig->type_at(0)->is_primitive_type()) {
1516 return false; // receiver should be an oop
1517 }
1518 sbase = 1; // skip receiver
1519 break;
1520 }
1521 case vmIntrinsics::_linkToStatic: {
1522 if (!target->is_static()) {
1523 return false;
1524 }
1525 break;
1526 }
1527 case vmIntrinsics::_invokeBasic: {
1528 if (target->is_static()) {
1529 if (target_sig->type_at(0)->is_primitive_type()) {
1530 return false; // receiver should be an oop
1531 }
1532 rbase = 1; // skip receiver
1533 }
1534 break;
1535 }
1536 default:
1537 break;
1538 }
1539 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1540 int arg_count = target_sig->count() - rbase;
1541 for (int i = 0; i < arg_count; i++) {
1542 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1543 return false;
1544 }
1545 }
1546 // Only check the return type if the symbolic info has non-void return type.
1547 // I.e. the return value of the resolved method can be dropped.
1548 if (!linker->return_type()->is_void() &&
1549 !basic_types_match(linker->return_type(), target->return_type())) {
1550 return false;
1551 }
1552 return true; // no mismatch found
1553 }
1554
1555 // ------------------------------------------------------------------
1556
1557 bool ciMethod::is_scalarized_arg(int idx) const {
1558 VM_ENTRY_MARK;
1559 return get_Method()->is_scalarized_arg(idx);
1560 }
1561
1562 bool ciMethod::has_scalarized_args() const {
1563 VM_ENTRY_MARK;
1564 return get_Method()->has_scalarized_args();
1565 }
1566
1567 const GrowableArray<SigEntry>* ciMethod::get_sig_cc() const {
1568 VM_ENTRY_MARK;
1569 if (get_Method()->adapter() == nullptr) {
1570 return nullptr;
1571 }
1572 return get_Method()->adapter()->get_sig_cc();
1573 }