1 /*
2 * Copyright (c) 1999, 2022, 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/methodLiveness.hpp"
40 #include "interpreter/interpreter.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "interpreter/oopMapCache.hpp"
43 #include "memory/allocation.inline.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "oops/generateOopMap.hpp"
46 #include "oops/method.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "runtime/deoptimization.hpp"
50 #include "runtime/handles.inline.hpp"
51 #include "runtime/sharedRuntime.hpp"
52 #include "utilities/bitMap.inline.hpp"
53 #include "utilities/xmlstream.hpp"
54 #ifdef COMPILER2
55 #include "ci/bcEscapeAnalyzer.hpp"
56 #include "ci/ciTypeFlow.hpp"
57 #include "oops/method.hpp"
58 #endif
59
60 // ciMethod
61 //
62 // This class represents a Method* in the HotSpot virtual
63 // machine.
64
65
66 // ------------------------------------------------------------------
67 // ciMethod::ciMethod
68 //
69 // Loaded method.
70 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
71 ciMetadata(h_m()),
72 _holder(holder)
73 {
74 assert(h_m() != NULL, "no null method");
75 assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
76
77 // These fields are always filled in in loaded methods.
78 _flags = ciFlags(h_m->access_flags());
79
80 // Easy to compute, so fill them in now.
81 _max_stack = h_m->max_stack();
82 _max_locals = h_m->max_locals();
83 _code_size = h_m->code_size();
84 _handler_count = h_m->exception_table_length();
85 _size_of_parameters = h_m->size_of_parameters();
86 _uses_monitors = h_m->access_flags().has_monitor_bytecodes();
87 _balanced_monitors = !_uses_monitors || h_m->access_flags().is_monitor_matching();
88 _is_c1_compilable = !h_m->is_not_c1_compilable();
89 _is_c2_compilable = !h_m->is_not_c2_compilable();
90 _can_be_parsed = true;
91 _has_reserved_stack_access = h_m->has_reserved_stack_access();
92 _is_overpass = h_m->is_overpass();
93 // Lazy fields, filled in on demand. Require allocation.
94 _code = NULL;
95 _exception_handlers = NULL;
96 _liveness = NULL;
97 _method_blocks = NULL;
98 #if defined(COMPILER2)
99 _flow = NULL;
100 _bcea = NULL;
101 #endif // COMPILER2
102
103 // Check for blackhole intrinsic and then populate the intrinsic ID.
104 CompilerOracle::tag_blackhole_if_possible(h_m);
105 _intrinsic_id = h_m->intrinsic_id();
106
107 ciEnv *env = CURRENT_ENV;
108 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
109 // 6328518 check hotswap conditions under the right lock.
110 MutexLocker locker(Compile_lock);
111 if (Dependencies::check_evol_method(h_m()) != NULL) {
112 _is_c1_compilable = false;
113 _is_c2_compilable = false;
114 _can_be_parsed = false;
115 }
116 } else {
117 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
118 }
119
120 if (h_m->method_holder()->is_linked()) {
121 _can_be_statically_bound = h_m->can_be_statically_bound();
122 _can_omit_stack_trace = h_m->can_omit_stack_trace();
123 } else {
124 // Have to use a conservative value in this case.
125 _can_be_statically_bound = false;
126 _can_omit_stack_trace = true;
127 }
128
129 // Adjust the definition of this condition to be more useful:
130 // %%% take these conditions into account in vtable generation
131 if (!_can_be_statically_bound && h_m->is_private())
132 _can_be_statically_bound = true;
133 if (_can_be_statically_bound && h_m->is_abstract())
134 _can_be_statically_bound = false;
135
136 // generating _signature may allow GC and therefore move m.
137 // These fields are always filled in.
138 _name = env->get_symbol(h_m->name());
139 ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
140 constantPoolHandle cpool(Thread::current(), h_m->constants());
141 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
142 _method_data = NULL;
143 // Take a snapshot of these values, so they will be commensurate with the MDO.
144 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
145 int invcnt = h_m->interpreter_invocation_count();
146 // if the value overflowed report it as max int
147 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
148 _interpreter_throwout_count = h_m->interpreter_throwout_count();
149 } else {
150 _interpreter_invocation_count = 0;
151 _interpreter_throwout_count = 0;
152 }
153 if (_interpreter_invocation_count == 0)
154 _interpreter_invocation_count = 1;
155 _instructions_size = -1;
156 if (ReplayCompiles) {
157 ciReplay::initialize(this);
158 }
159 }
160
161
162 // ------------------------------------------------------------------
163 // ciMethod::ciMethod
164 //
165 // Unloaded method.
166 ciMethod::ciMethod(ciInstanceKlass* holder,
167 ciSymbol* name,
168 ciSymbol* signature,
169 ciInstanceKlass* accessor) :
170 ciMetadata((Metadata*)NULL),
171 _name( name),
172 _holder( holder),
173 _method_data( NULL),
174 _method_blocks( NULL),
175 _intrinsic_id( vmIntrinsics::_none),
176 _instructions_size(-1),
177 _can_be_statically_bound(false),
178 _can_omit_stack_trace(true),
179 _liveness( NULL)
180 #if defined(COMPILER2)
181 ,
182 _flow( NULL),
183 _bcea( NULL)
184 #endif // COMPILER2
185 {
186 // Usually holder and accessor are the same type but in some cases
187 // the holder has the wrong class loader (e.g. invokedynamic call
188 // sites) so we pass the accessor.
189 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
190 }
191
192
193 // ------------------------------------------------------------------
194 // ciMethod::load_code
195 //
196 // Load the bytecodes and exception handler table for this method.
197 void ciMethod::load_code() {
198 VM_ENTRY_MARK;
199 assert(is_loaded(), "only loaded methods have code");
200
201 Method* me = get_Method();
202 Arena* arena = CURRENT_THREAD_ENV->arena();
203
204 // Load the bytecodes.
205 _code = (address)arena->Amalloc(code_size());
206 memcpy(_code, me->code_base(), code_size());
207
208 #if INCLUDE_JVMTI
209 // Revert any breakpoint bytecodes in ci's copy
210 if (me->number_of_breakpoints() > 0) {
211 BreakpointInfo* bp = me->method_holder()->breakpoints();
212 for (; bp != NULL; bp = bp->next()) {
213 if (bp->match(me)) {
214 code_at_put(bp->bci(), bp->orig_bytecode());
215 }
216 }
217 }
218 #endif
219
220 // And load the exception table.
221 ExceptionTable exc_table(me);
222
223 // Allocate one extra spot in our list of exceptions. This
224 // last entry will be used to represent the possibility that
225 // an exception escapes the method. See ciExceptionHandlerStream
226 // for details.
227 _exception_handlers =
228 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
229 * (_handler_count + 1));
230 if (_handler_count > 0) {
231 for (int i=0; i<_handler_count; i++) {
232 _exception_handlers[i] = new (arena) ciExceptionHandler(
233 holder(),
234 /* start */ exc_table.start_pc(i),
235 /* limit */ exc_table.end_pc(i),
236 /* goto pc */ exc_table.handler_pc(i),
237 /* cp index */ exc_table.catch_type_index(i));
238 }
239 }
240
241 // Put an entry at the end of our list to represent the possibility
242 // of exceptional exit.
243 _exception_handlers[_handler_count] =
244 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
245
246 if (CIPrintMethodCodes) {
247 print_codes();
248 }
249 }
250
251
252 // ------------------------------------------------------------------
253 // ciMethod::has_linenumber_table
254 //
255 // length unknown until decompression
256 bool ciMethod::has_linenumber_table() const {
257 check_is_loaded();
258 VM_ENTRY_MARK;
259 return get_Method()->has_linenumber_table();
260 }
261
262
263 // ------------------------------------------------------------------
264 // ciMethod::line_number_from_bci
265 int ciMethod::line_number_from_bci(int bci) const {
266 check_is_loaded();
267 VM_ENTRY_MARK;
268 return get_Method()->line_number_from_bci(bci);
269 }
270
271
272 // ------------------------------------------------------------------
273 // ciMethod::vtable_index
274 //
275 // Get the position of this method's entry in the vtable, if any.
276 int ciMethod::vtable_index() {
277 check_is_loaded();
278 assert(holder()->is_linked(), "must be linked");
279 VM_ENTRY_MARK;
280 return get_Method()->vtable_index();
281 }
282
283 // ------------------------------------------------------------------
284 // ciMethod::uses_balanced_monitors
285 //
286 // Does this method use monitors in a strict stack-disciplined manner?
287 bool ciMethod::has_balanced_monitors() {
288 check_is_loaded();
289 if (_balanced_monitors) return true;
290
291 // Analyze the method to see if monitors are used properly.
292 VM_ENTRY_MARK;
293 methodHandle method(THREAD, get_Method());
294 assert(method->has_monitor_bytecodes(), "should have checked this");
295
296 // Check to see if a previous compilation computed the
297 // monitor-matching analysis.
298 if (method->guaranteed_monitor_matching()) {
299 _balanced_monitors = true;
300 return true;
301 }
302
303 {
304 ExceptionMark em(THREAD);
305 ResourceMark rm(THREAD);
306 GeneratePairingInfo gpi(method);
307 if (!gpi.compute_map(THREAD)) {
308 fatal("Unrecoverable verification or out-of-memory error");
309 }
310 if (!gpi.monitor_safe()) {
311 return false;
312 }
313 method->set_guaranteed_monitor_matching();
314 _balanced_monitors = true;
315 }
316 return true;
317 }
318
319
320 // ------------------------------------------------------------------
321 // ciMethod::get_flow_analysis
322 ciTypeFlow* ciMethod::get_flow_analysis() {
323 #if defined(COMPILER2)
324 if (_flow == NULL) {
325 ciEnv* env = CURRENT_ENV;
326 _flow = new (env->arena()) ciTypeFlow(env, this);
327 _flow->do_flow();
328 }
329 return _flow;
330 #else // COMPILER2
331 ShouldNotReachHere();
332 return NULL;
333 #endif // COMPILER2
334 }
335
336
337 // ------------------------------------------------------------------
338 // ciMethod::get_osr_flow_analysis
339 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
340 #if defined(COMPILER2)
341 // OSR entry points are always place after a call bytecode of some sort
342 assert(osr_bci >= 0, "must supply valid OSR entry point");
343 ciEnv* env = CURRENT_ENV;
344 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
345 flow->do_flow();
346 return flow;
347 #else // COMPILER2
348 ShouldNotReachHere();
349 return NULL;
350 #endif // COMPILER2
351 }
352
353 // ------------------------------------------------------------------
354 // ciMethod::raw_liveness_at_bci
355 //
356 // Which local variables are live at a specific bci?
357 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
358 check_is_loaded();
359 if (_liveness == NULL) {
360 // Create the liveness analyzer.
361 Arena* arena = CURRENT_ENV->arena();
362 _liveness = new (arena) MethodLiveness(arena, this);
363 _liveness->compute_liveness();
364 }
365 return _liveness->get_liveness_at(bci);
366 }
367
368 // ------------------------------------------------------------------
369 // ciMethod::liveness_at_bci
370 //
371 // Which local variables are live at a specific bci? When debugging
372 // will return true for all locals in some cases to improve debug
373 // information.
374 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
375 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
376 // Keep all locals live for the user's edification and amusement.
377 MethodLivenessResult result(_max_locals);
378 result.set_range(0, _max_locals);
379 result.set_is_valid();
380 return result;
381 }
382 return raw_liveness_at_bci(bci);
383 }
384
385 // ciMethod::live_local_oops_at_bci
386 //
387 // find all the live oops in the locals array for a particular bci
388 // Compute what the interpreter believes by using the interpreter
389 // oopmap generator. This is used as a double check during osr to
390 // guard against conservative result from MethodLiveness making us
391 // think a dead oop is live. MethodLiveness is conservative in the
392 // sense that it may consider locals to be live which cannot be live,
393 // like in the case where a local could contain an oop or a primitive
394 // along different paths. In that case the local must be dead when
395 // those paths merge. Since the interpreter's viewpoint is used when
396 // gc'ing an interpreter frame we need to use its viewpoint during
397 // OSR when loading the locals.
398
399 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
400 VM_ENTRY_MARK;
401 InterpreterOopMap mask;
402 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
403 int mask_size = max_locals();
404 ResourceBitMap result(mask_size);
405 int i;
406 for (i = 0; i < mask_size ; i++ ) {
407 if (mask.is_oop(i)) result.set_bit(i);
408 }
409 return result;
410 }
411
412
413 #ifdef COMPILER1
414 // ------------------------------------------------------------------
415 // ciMethod::bci_block_start
416 //
417 // Marks all bcis where a new basic block starts
418 const BitMap& ciMethod::bci_block_start() {
419 check_is_loaded();
420 if (_liveness == NULL) {
421 // Create the liveness analyzer.
422 Arena* arena = CURRENT_ENV->arena();
423 _liveness = new (arena) MethodLiveness(arena, this);
424 _liveness->compute_liveness();
425 }
426
427 return _liveness->get_bci_block_start();
428 }
429 #endif // COMPILER1
430
431
432 // ------------------------------------------------------------------
433 // ciMethod::check_overflow
434 //
435 // Check whether the profile counter is overflowed and adjust if true.
436 // For invoke* it will turn negative values into max_jint,
437 // and for checkcast/aastore/instanceof turn positive values into min_jint.
438 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
439 switch (code) {
440 case Bytecodes::_aastore: // fall-through
441 case Bytecodes::_checkcast: // fall-through
442 case Bytecodes::_instanceof: {
443 return (c > 0 ? min_jint : c); // always non-positive
444 }
445 default: {
446 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
447 return (c < 0 ? max_jint : c); // always non-negative
448 }
449 }
450 }
451
452
453 // ------------------------------------------------------------------
454 // ciMethod::call_profile_at_bci
455 //
456 // Get the ciCallProfile for the invocation of this method.
457 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
458 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
459 ResourceMark rm;
460 ciCallProfile result;
461 if (method_data() != NULL && method_data()->is_mature()) {
462 ciProfileData* data = method_data()->bci_to_data(bci);
463 if (data != NULL && data->is_CounterData()) {
464 // Every profiled call site has a counter.
465 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
466
467 if (!data->is_ReceiverTypeData()) {
468 result._receiver_count[0] = 0; // that's a definite zero
469 } else { // ReceiverTypeData is a subclass of CounterData
470 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
471 // In addition, virtual call sites have receiver type information
472 int receivers_count_total = 0;
473 int morphism = 0;
474 // Precompute morphism for the possible fixup
475 for (uint i = 0; i < call->row_limit(); i++) {
476 ciKlass* receiver = call->receiver(i);
477 if (receiver == NULL) continue;
478 morphism++;
479 }
480 int epsilon = 0;
481 // For a call, it is assumed that either the type of the receiver(s)
482 // is recorded or an associated counter is incremented, but not both. With
483 // tiered compilation, however, both can happen due to the interpreter and
484 // C1 profiling invocations differently. Address that inconsistency here.
485 if (morphism == 1 && count > 0) {
486 epsilon = count;
487 count = 0;
488 }
489 for (uint i = 0; i < call->row_limit(); i++) {
490 ciKlass* receiver = call->receiver(i);
491 if (receiver == NULL) continue;
492 int rcount = saturated_add(call->receiver_count(i), epsilon);
493 if (rcount == 0) rcount = 1; // Should be valid value
494 receivers_count_total = saturated_add(receivers_count_total, rcount);
495 // Add the receiver to result data.
496 result.add_receiver(receiver, rcount);
497 // If we extend profiling to record methods,
498 // we will set result._method also.
499 }
500 // Determine call site's morphism.
501 // The call site count is 0 with known morphism (only 1 or 2 receivers)
502 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
503 // The call site count is > 0 in the case of a polymorphic virtual call.
504 if (morphism > 0 && morphism == result._limit) {
505 // The morphism <= MorphismLimit.
506 if ((morphism < ciCallProfile::MorphismLimit) ||
507 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
508 #ifdef ASSERT
509 if (count > 0) {
510 this->print_short_name(tty);
511 tty->print_cr(" @ bci:%d", bci);
512 this->print_codes();
513 assert(false, "this call site should not be polymorphic");
514 }
515 #endif
516 result._morphism = morphism;
517 }
518 }
519 // Make the count consistent if this is a call profile. If count is
520 // zero or less, presume that this is a typecheck profile and
521 // do nothing. Otherwise, increase count to be the sum of all
522 // receiver's counts.
523 if (count >= 0) {
524 count = saturated_add(count, receivers_count_total);
525 }
526 }
527 result._count = count;
528 }
529 }
530 return result;
531 }
532
533 // ------------------------------------------------------------------
534 // Add new receiver and sort data by receiver's profile count.
535 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
536 // Add new receiver and sort data by receiver's counts when we have space
537 // for it otherwise replace the less called receiver (less called receiver
538 // is placed to the last array element which is not used).
539 // First array's element contains most called receiver.
540 int i = _limit;
541 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
542 _receiver[i] = _receiver[i-1];
543 _receiver_count[i] = _receiver_count[i-1];
544 }
545 _receiver[i] = receiver;
546 _receiver_count[i] = receiver_count;
547 if (_limit < MorphismLimit) _limit++;
548 }
549
550
551 void ciMethod::assert_virtual_call_type_ok(int bci) {
552 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
553 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
554 }
555
556 void ciMethod::assert_call_type_ok(int bci) {
557 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
558 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
559 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
560 }
561
562 /**
563 * Check whether profiling provides a type for the argument i to the
564 * call at bci bci
565 *
566 * @param [in]bci bci of the call
567 * @param [in]i argument number
568 * @param [out]type profiled type of argument, NULL if none
569 * @param [out]ptr_kind whether always null, never null or maybe null
570 * @return true if profiling exists
571 *
572 */
573 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
574 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
575 ciProfileData* data = method_data()->bci_to_data(bci);
576 if (data != NULL) {
577 if (data->is_VirtualCallTypeData()) {
578 assert_virtual_call_type_ok(bci);
579 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
580 if (i >= call->number_of_arguments()) {
581 return false;
582 }
583 type = call->valid_argument_type(i);
584 ptr_kind = call->argument_ptr_kind(i);
585 return true;
586 } else if (data->is_CallTypeData()) {
587 assert_call_type_ok(bci);
588 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
589 if (i >= call->number_of_arguments()) {
590 return false;
591 }
592 type = call->valid_argument_type(i);
593 ptr_kind = call->argument_ptr_kind(i);
594 return true;
595 }
596 }
597 }
598 return false;
599 }
600
601 /**
602 * Check whether profiling provides a type for the return value from
603 * the call at bci bci
604 *
605 * @param [in]bci bci of the call
606 * @param [out]type profiled type of argument, NULL if none
607 * @param [out]ptr_kind whether always null, never null or maybe null
608 * @return true if profiling exists
609 *
610 */
611 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
612 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
613 ciProfileData* data = method_data()->bci_to_data(bci);
614 if (data != NULL) {
615 if (data->is_VirtualCallTypeData()) {
616 assert_virtual_call_type_ok(bci);
617 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
618 if (call->has_return()) {
619 type = call->valid_return_type();
620 ptr_kind = call->return_ptr_kind();
621 return true;
622 }
623 } else if (data->is_CallTypeData()) {
624 assert_call_type_ok(bci);
625 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
626 if (call->has_return()) {
627 type = call->valid_return_type();
628 ptr_kind = call->return_ptr_kind();
629 }
630 return true;
631 }
632 }
633 }
634 return false;
635 }
636
637 /**
638 * Check whether profiling provides a type for the parameter i
639 *
640 * @param [in]i parameter number
641 * @param [out]type profiled type of parameter, NULL if none
642 * @param [out]ptr_kind whether always null, never null or maybe null
643 * @return true if profiling exists
644 *
645 */
646 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
647 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
648 ciParametersTypeData* parameters = method_data()->parameters_type_data();
649 if (parameters != NULL && i < parameters->number_of_parameters()) {
650 type = parameters->valid_parameter_type(i);
651 ptr_kind = parameters->parameter_ptr_kind(i);
652 return true;
653 }
654 }
655 return false;
656 }
657
658 bool ciMethod::array_access_profiled_type(int bci, ciKlass*& array_type, ciKlass*& element_type, ProfilePtrKind& element_ptr, bool &flat_array, bool &null_free_array) {
659 if (method_data() != NULL && method_data()->is_mature()) {
660 ciProfileData* data = method_data()->bci_to_data(bci);
661 if (data != NULL && data->is_ArrayLoadStoreData()) {
662 ciArrayLoadStoreData* array_access = (ciArrayLoadStoreData*)data->as_ArrayLoadStoreData();
663 array_type = array_access->array()->valid_type();
664 element_type = array_access->element()->valid_type();
665 element_ptr = array_access->element()->ptr_kind();
666 flat_array = array_access->flat_array();
667 null_free_array = array_access->null_free_array();
668 return true;
669 }
670 }
671 return false;
672 }
673
674 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) {
675 if (method_data() != NULL && method_data()->is_mature()) {
676 ciProfileData* data = method_data()->bci_to_data(bci);
677 if (data != NULL && data->is_ACmpData()) {
678 ciACmpData* acmp = (ciACmpData*)data->as_ACmpData();
679 left_type = acmp->left()->valid_type();
680 right_type = acmp->right()->valid_type();
681 left_ptr = acmp->left()->ptr_kind();
682 right_ptr = acmp->right()->ptr_kind();
683 left_inline_type = acmp->left_inline_type();
684 right_inline_type = acmp->right_inline_type();
685 return true;
686 }
687 }
688 return false;
689 }
690
691
692 // ------------------------------------------------------------------
693 // ciMethod::find_monomorphic_target
694 //
695 // Given a certain calling environment, find the monomorphic target
696 // for the call. Return NULL if the call is not monomorphic in
697 // its calling environment, or if there are only abstract methods.
698 // The returned method is never abstract.
699 // Note: If caller uses a non-null result, it must inform dependencies
700 // via assert_unique_concrete_method or assert_leaf_type.
701 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
702 ciInstanceKlass* callee_holder,
703 ciInstanceKlass* actual_recv,
704 bool check_access) {
705 check_is_loaded();
706
707 if (actual_recv->is_interface()) {
708 // %%% We cannot trust interface types, yet. See bug 6312651.
709 return NULL;
710 }
711
712 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
713 if (root_m == NULL) {
714 // Something went wrong looking up the actual receiver method.
715 return NULL;
716 }
717
718 // Make certain quick checks even if UseCHA is false.
719
720 // Is it private or final?
721 if (root_m->can_be_statically_bound()) {
722 assert(!root_m->is_abstract(), "sanity");
723 return root_m;
724 }
725
726 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
727 // Easy case. There is no other place to put a method, so don't bother
728 // to go through the VM_ENTRY_MARK and all the rest.
729 if (root_m->is_abstract()) {
730 return NULL;
731 }
732 return root_m;
733 }
734
735 // Array methods (clone, hashCode, etc.) are always statically bound.
736 // If we were to see an array type here, we'd return root_m.
737 // However, this method processes only ciInstanceKlasses. (See 4962591.)
738 // The inline_native_clone intrinsic narrows Object to T[] properly,
739 // so there is no need to do the same job here.
740
741 if (!UseCHA) return NULL;
742
743 VM_ENTRY_MARK;
744
745 methodHandle target;
746 {
747 MutexLocker locker(Compile_lock);
748 InstanceKlass* context = actual_recv->get_instanceKlass();
749 if (UseVtableBasedCHA) {
750 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
751 root_m->get_Method(),
752 callee_holder->get_Klass(),
753 this->get_Method()));
754 } else {
755 if (root_m->is_abstract()) {
756 return NULL; // not supported
757 }
758 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context, root_m->get_Method()));
759 }
760 assert(target() == NULL || !target()->is_abstract(), "not allowed");
761 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
762 }
763
764 #ifndef PRODUCT
765 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
766 tty->print("found a non-root unique target method");
767 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
768 tty->print(" method = ");
769 target->print_short_name(tty);
770 tty->cr();
771 }
772 #endif //PRODUCT
773
774 if (target() == NULL) {
775 return NULL;
776 }
777 if (target() == root_m->get_Method()) {
778 return root_m;
779 }
780 if (!root_m->is_public() &&
781 !root_m->is_protected()) {
782 // If we are going to reason about inheritance, it's easiest
783 // if the method in question is public, protected, or private.
784 // If the answer is not root_m, it is conservatively correct
785 // to return NULL, even if the CHA encountered irrelevant
786 // methods in other packages.
787 // %%% TO DO: Work out logic for package-private methods
788 // with the same name but different vtable indexes.
789 return NULL;
790 }
791 return CURRENT_THREAD_ENV->get_method(target());
792 }
793
794 // ------------------------------------------------------------------
795 // ciMethod::can_be_statically_bound
796 //
797 // Tries to determine whether a method can be statically bound in some context.
798 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
799 return (holder() == context) && can_be_statically_bound();
800 }
801
802 // ------------------------------------------------------------------
803 // ciMethod::can_omit_stack_trace
804 //
805 // Tries to determine whether a method can omit stack trace in throw in compiled code.
806 bool ciMethod::can_omit_stack_trace() const {
807 if (!StackTraceInThrowable) {
808 return true; // stack trace is switched off.
809 }
810 if (!OmitStackTraceInFastThrow) {
811 return false; // Have to provide stack trace.
812 }
813 return _can_omit_stack_trace;
814 }
815
816 // ------------------------------------------------------------------
817 // ciMethod::resolve_invoke
818 //
819 // Given a known receiver klass, find the target for the call.
820 // Return NULL if the call has no target or the target is abstract.
821 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
822 check_is_loaded();
823 VM_ENTRY_MARK;
824
825 Klass* caller_klass = caller->get_Klass();
826 Klass* recv = exact_receiver->get_Klass();
827 Klass* resolved = holder()->get_Klass();
828 Symbol* h_name = name()->get_symbol();
829 Symbol* h_signature = signature()->get_symbol();
830
831 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
832 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
833 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
834 Method* m = NULL;
835 // Only do exact lookup if receiver klass has been linked. Otherwise,
836 // the vtable has not been setup, and the LinkResolver will fail.
837 if (recv->is_array_klass()
838 ||
839 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
840 if (holder()->is_interface()) {
841 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
842 } else {
843 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
844 }
845 }
846
847 if (m == NULL) {
848 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
849 return NULL;
850 }
851
852 ciMethod* result = this;
853 if (m != get_Method()) {
854 result = CURRENT_THREAD_ENV->get_method(m);
855 }
856
857 if (result->is_abstract() && !allow_abstract) {
858 // Don't return abstract methods because they aren't optimizable or interesting.
859 return NULL;
860 }
861 return result;
862 }
863
864 // ------------------------------------------------------------------
865 // ciMethod::resolve_vtable_index
866 //
867 // Given a known receiver klass, find the vtable index for the call.
868 // Return Method::invalid_vtable_index if the vtable_index is unknown.
869 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
870 check_is_loaded();
871
872 int vtable_index = Method::invalid_vtable_index;
873 // Only do lookup if receiver klass has been linked. Otherwise,
874 // the vtable has not been setup, and the LinkResolver will fail.
875 if (!receiver->is_interface()
876 && (!receiver->is_instance_klass() ||
877 receiver->as_instance_klass()->is_linked())) {
878 VM_ENTRY_MARK;
879
880 Klass* caller_klass = caller->get_Klass();
881 Klass* recv = receiver->get_Klass();
882 Symbol* h_name = name()->get_symbol();
883 Symbol* h_signature = signature()->get_symbol();
884
885 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
886 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
887 if (vtable_index == Method::nonvirtual_vtable_index) {
888 // A statically bound method. Return "no such index".
889 vtable_index = Method::invalid_vtable_index;
890 }
891 }
892
893 return vtable_index;
894 }
895
896 // ------------------------------------------------------------------
897 // ciMethod::get_field_at_bci
898 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
899 ciBytecodeStream iter(this);
900 iter.reset_to_bci(bci);
901 iter.next();
902 return iter.get_field(will_link);
903 }
904
905 // ------------------------------------------------------------------
906 // ciMethod::get_method_at_bci
907 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
908 ciBytecodeStream iter(this);
909 iter.reset_to_bci(bci);
910 iter.next();
911 return iter.get_method(will_link, declared_signature);
912 }
913
914 // ------------------------------------------------------------------
915 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
916 ciBytecodeStream iter(this);
917 iter.reset_to_bci(bci);
918 iter.next();
919 return iter.get_declared_method_holder();
920 }
921
922 // ------------------------------------------------------------------
923 // Adjust a CounterData count to be commensurate with
924 // interpreter_invocation_count. If the MDO exists for
925 // only 25% of the time the method exists, then the
926 // counts in the MDO should be scaled by 4X, so that
927 // they can be usefully and stably compared against the
928 // invocation counts in methods.
929 int ciMethod::scale_count(int count, float prof_factor) {
930 if (count > 0 && method_data() != NULL) {
931 int counter_life = method_data()->invocation_count();
932 int method_life = interpreter_invocation_count();
933 if (method_life < counter_life) { // may happen because of the snapshot timing
934 method_life = counter_life;
935 }
936 if (counter_life > 0) {
937 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
938 count = (count > 0) ? count : 1;
939 } else {
940 count = 1;
941 }
942 }
943 return count;
944 }
945
946
947 // ------------------------------------------------------------------
948 // ciMethod::is_special_get_caller_class_method
949 //
950 bool ciMethod::is_ignored_by_security_stack_walk() const {
951 check_is_loaded();
952 VM_ENTRY_MARK;
953 return get_Method()->is_ignored_by_security_stack_walk();
954 }
955
956 // ------------------------------------------------------------------
957 // ciMethod::needs_clinit_barrier
958 //
959 bool ciMethod::needs_clinit_barrier() const {
960 check_is_loaded();
961 return is_static() && !holder()->is_initialized();
962 }
963
964 // ------------------------------------------------------------------
965 // invokedynamic support
966
967 // ------------------------------------------------------------------
968 // ciMethod::is_method_handle_intrinsic
969 //
970 // Return true if the method is an instance of the JVM-generated
971 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
972 bool ciMethod::is_method_handle_intrinsic() const {
973 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
974 return (MethodHandles::is_signature_polymorphic(iid) &&
975 MethodHandles::is_signature_polymorphic_intrinsic(iid));
976 }
977
978 // ------------------------------------------------------------------
979 // ciMethod::is_compiled_lambda_form
980 //
981 // Return true if the method is a generated MethodHandle adapter.
982 // These are built by Java code.
983 bool ciMethod::is_compiled_lambda_form() const {
984 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
985 return iid == vmIntrinsics::_compiledLambdaForm;
986 }
987
988 // ------------------------------------------------------------------
989 // ciMethod::is_object_constructor
990 //
991 bool ciMethod::is_object_constructor() const {
992 return (name() == ciSymbols::object_initializer_name()
993 && signature()->return_type()->is_void());
994 // Note: We can't test is_static, because that would
995 // require the method to be loaded. Sometimes it isn't.
996 }
997
998 // ------------------------------------------------------------------
999 // ciMethod::is_static_vnew_factory
1000 //
1001 bool ciMethod::is_static_vnew_factory() const {
1002 return (name() == ciSymbols::inline_factory_name()
1003 && !signature()->return_type()->is_void());
1004 // Note: We can't test is_static, because that would
1005 // require the method to be loaded. Sometimes it isn't.
1006 }
1007
1008 // ------------------------------------------------------------------
1009 // ciMethod::has_member_arg
1010 //
1011 // Return true if the method is a linker intrinsic like _linkToVirtual.
1012 // These are built by the JVM.
1013 bool ciMethod::has_member_arg() const {
1014 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
1015 return (MethodHandles::is_signature_polymorphic(iid) &&
1016 MethodHandles::has_member_arg(iid));
1017 }
1018
1019 // ------------------------------------------------------------------
1020 // ciMethod::ensure_method_data
1021 //
1022 // Generate new MethodData* objects at compile time.
1023 // Return true if allocation was successful or no MDO is required.
1024 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1025 EXCEPTION_CONTEXT;
1026 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1027 return true;
1028 }
1029 if (h_m()->method_data() == NULL) {
1030 Method::build_profiling_method_data(h_m, THREAD);
1031 if (HAS_PENDING_EXCEPTION) {
1032 CLEAR_PENDING_EXCEPTION;
1033 }
1034 }
1035 if (h_m()->method_data() != NULL) {
1036 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1037 return _method_data->load_data();
1038 } else {
1039 _method_data = CURRENT_ENV->get_empty_methodData();
1040 return false;
1041 }
1042 }
1043
1044 // public, retroactive version
1045 bool ciMethod::ensure_method_data() {
1046 bool result = true;
1047 if (_method_data == NULL || _method_data->is_empty()) {
1048 GUARDED_VM_ENTRY({
1049 methodHandle mh(Thread::current(), get_Method());
1050 result = ensure_method_data(mh);
1051 });
1052 }
1053 return result;
1054 }
1055
1056
1057 // ------------------------------------------------------------------
1058 // ciMethod::method_data
1059 //
1060 ciMethodData* ciMethod::method_data() {
1061 if (_method_data != NULL) {
1062 return _method_data;
1063 }
1064 VM_ENTRY_MARK;
1065 ciEnv* env = CURRENT_ENV;
1066 Thread* my_thread = JavaThread::current();
1067 methodHandle h_m(my_thread, get_Method());
1068
1069 if (h_m()->method_data() != NULL) {
1070 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1071 _method_data->load_data();
1072 } else {
1073 _method_data = CURRENT_ENV->get_empty_methodData();
1074 }
1075 return _method_data;
1076
1077 }
1078
1079 // ------------------------------------------------------------------
1080 // ciMethod::method_data_or_null
1081 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1082 // NULL otherwise.
1083 ciMethodData* ciMethod::method_data_or_null() {
1084 ciMethodData *md = method_data();
1085 if (md->is_empty()) {
1086 return NULL;
1087 }
1088 return md;
1089 }
1090
1091 // ------------------------------------------------------------------
1092 // ciMethod::ensure_method_counters
1093 //
1094 MethodCounters* ciMethod::ensure_method_counters() {
1095 check_is_loaded();
1096 VM_ENTRY_MARK;
1097 methodHandle mh(THREAD, get_Method());
1098 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1099 return method_counters;
1100 }
1101
1102 // ------------------------------------------------------------------
1103 // ciMethod::has_option
1104 //
1105 bool ciMethod::has_option(enum CompileCommand option) {
1106 check_is_loaded();
1107 VM_ENTRY_MARK;
1108 methodHandle mh(THREAD, get_Method());
1109 return CompilerOracle::has_option(mh, option);
1110 }
1111
1112 // ------------------------------------------------------------------
1113 // ciMethod::has_option_value
1114 //
1115 bool ciMethod::has_option_value(enum CompileCommand option, double& value) {
1116 check_is_loaded();
1117 VM_ENTRY_MARK;
1118 methodHandle mh(THREAD, get_Method());
1119 return CompilerOracle::has_option_value(mh, option, value);
1120 }
1121 // ------------------------------------------------------------------
1122 // ciMethod::can_be_compiled
1123 //
1124 // Have previous compilations of this method succeeded?
1125 bool ciMethod::can_be_compiled() {
1126 check_is_loaded();
1127 ciEnv* env = CURRENT_ENV;
1128 if (is_c1_compile(env->comp_level())) {
1129 return _is_c1_compilable;
1130 }
1131 return _is_c2_compilable;
1132 }
1133
1134 // ------------------------------------------------------------------
1135 // ciMethod::has_compiled_code
1136 bool ciMethod::has_compiled_code() {
1137 return instructions_size() > 0;
1138 }
1139
1140 int ciMethod::highest_osr_comp_level() {
1141 check_is_loaded();
1142 VM_ENTRY_MARK;
1143 return get_Method()->highest_osr_comp_level();
1144 }
1145
1146 // ------------------------------------------------------------------
1147 // ciMethod::code_size_for_inlining
1148 //
1149 // Code size for inlining decisions. This method returns a code
1150 // size of 1 for methods which has the ForceInline annotation.
1151 int ciMethod::code_size_for_inlining() {
1152 check_is_loaded();
1153 if (get_Method()->force_inline()) {
1154 return 1;
1155 }
1156 return code_size();
1157 }
1158
1159 // ------------------------------------------------------------------
1160 // ciMethod::instructions_size
1161 //
1162 // This is a rough metric for "fat" methods, compared before inlining
1163 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1164 // junk like exception handler, stubs, and constant table, which are
1165 // not highly relevant to an inlined method. So we use the more
1166 // specific accessor nmethod::insts_size.
1167 int ciMethod::instructions_size() {
1168 if (_instructions_size == -1) {
1169 GUARDED_VM_ENTRY(
1170 CompiledMethod* code = get_Method()->code();
1171 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1172 _instructions_size = code->insts_end() - code->verified_entry_point();
1173 } else {
1174 _instructions_size = 0;
1175 }
1176 );
1177 }
1178 return _instructions_size;
1179 }
1180
1181 // ------------------------------------------------------------------
1182 // ciMethod::log_nmethod_identity
1183 void ciMethod::log_nmethod_identity(xmlStream* log) {
1184 GUARDED_VM_ENTRY(
1185 CompiledMethod* code = get_Method()->code();
1186 if (code != NULL) {
1187 code->log_identity(log);
1188 }
1189 )
1190 }
1191
1192 // ------------------------------------------------------------------
1193 // ciMethod::is_not_reached
1194 bool ciMethod::is_not_reached(int bci) {
1195 check_is_loaded();
1196 VM_ENTRY_MARK;
1197 return Interpreter::is_not_reached(
1198 methodHandle(THREAD, get_Method()), bci);
1199 }
1200
1201 // ------------------------------------------------------------------
1202 // ciMethod::was_never_executed
1203 bool ciMethod::was_executed_more_than(int times) {
1204 VM_ENTRY_MARK;
1205 return get_Method()->was_executed_more_than(times);
1206 }
1207
1208 // ------------------------------------------------------------------
1209 // ciMethod::has_unloaded_classes_in_signature
1210 bool ciMethod::has_unloaded_classes_in_signature() {
1211 // ciSignature is resolved against some accessing class and
1212 // signature classes aren't required to be local. As a benefit,
1213 // it makes signature classes visible through loader constraints.
1214 // So, encountering an unloaded class signals it is absent both in
1215 // the callee (local) and caller contexts.
1216 return signature()->has_unloaded_classes();
1217 }
1218
1219 // ------------------------------------------------------------------
1220 // ciMethod::is_klass_loaded
1221 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1222 VM_ENTRY_MARK;
1223 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1224 }
1225
1226 // ------------------------------------------------------------------
1227 // ciMethod::check_call
1228 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1229 // This method is used only in C2 from InlineTree::ok_to_inline,
1230 // and is only used under -Xcomp.
1231 // It appears to fail when applied to an invokeinterface call site.
1232 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1233 VM_ENTRY_MARK;
1234 {
1235 ExceptionMark em(THREAD);
1236 HandleMark hm(THREAD);
1237 constantPoolHandle pool (THREAD, get_Method()->constants());
1238 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1239 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1240 if (HAS_PENDING_EXCEPTION) {
1241 CLEAR_PENDING_EXCEPTION;
1242 return false;
1243 } else {
1244 return (spec_method->is_static() == is_static);
1245 }
1246 }
1247 return false;
1248 }
1249 // ------------------------------------------------------------------
1250 // ciMethod::print_codes
1251 //
1252 // Print the bytecodes for this method.
1253 void ciMethod::print_codes_on(outputStream* st) {
1254 check_is_loaded();
1255 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1256 }
1257
1258
1259 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1260 check_is_loaded(); \
1261 VM_ENTRY_MARK; \
1262 return get_Method()->flag_accessor(); \
1263 }
1264
1265 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1266 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1267 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1268 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1269 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1270 bool ciMethod::is_object_constructor_or_class_initializer() const { FETCH_FLAG_FROM_VM(is_object_constructor_or_class_initializer); }
1271 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); }
1272
1273 bool ciMethod::is_boxing_method() const {
1274 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1275 switch (intrinsic_id()) {
1276 case vmIntrinsics::_Boolean_valueOf:
1277 case vmIntrinsics::_Byte_valueOf:
1278 case vmIntrinsics::_Character_valueOf:
1279 case vmIntrinsics::_Short_valueOf:
1280 case vmIntrinsics::_Integer_valueOf:
1281 case vmIntrinsics::_Long_valueOf:
1282 case vmIntrinsics::_Float_valueOf:
1283 case vmIntrinsics::_Double_valueOf:
1284 return true;
1285 default:
1286 return false;
1287 }
1288 }
1289 return false;
1290 }
1291
1292 bool ciMethod::is_unboxing_method() const {
1293 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1294 switch (intrinsic_id()) {
1295 case vmIntrinsics::_booleanValue:
1296 case vmIntrinsics::_byteValue:
1297 case vmIntrinsics::_charValue:
1298 case vmIntrinsics::_shortValue:
1299 case vmIntrinsics::_intValue:
1300 case vmIntrinsics::_longValue:
1301 case vmIntrinsics::_floatValue:
1302 case vmIntrinsics::_doubleValue:
1303 return true;
1304 default:
1305 return false;
1306 }
1307 }
1308 return false;
1309 }
1310
1311 bool ciMethod::is_vector_method() const {
1312 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1313 (intrinsic_id() != vmIntrinsics::_none);
1314 }
1315
1316 BCEscapeAnalyzer *ciMethod::get_bcea() {
1317 #ifdef COMPILER2
1318 if (_bcea == NULL) {
1319 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1320 }
1321 return _bcea;
1322 #else // COMPILER2
1323 ShouldNotReachHere();
1324 return NULL;
1325 #endif // COMPILER2
1326 }
1327
1328 ciMethodBlocks *ciMethod::get_method_blocks() {
1329 if (_method_blocks == NULL) {
1330 Arena *arena = CURRENT_ENV->arena();
1331 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1332 }
1333 return _method_blocks;
1334 }
1335
1336 #undef FETCH_FLAG_FROM_VM
1337
1338 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1339 st->print("%s %s %s",
1340 CURRENT_ENV->replay_name(method->method_holder()),
1341 method->name()->as_quoted_ascii(),
1342 method->signature()->as_quoted_ascii());
1343 }
1344
1345 void ciMethod::dump_name_as_ascii(outputStream* st) {
1346 Method* method = get_Method();
1347 dump_name_as_ascii(st, method);
1348 }
1349
1350 void ciMethod::dump_replay_data(outputStream* st) {
1351 ResourceMark rm;
1352 Method* method = get_Method();
1353 if (MethodHandles::is_signature_polymorphic_method(method)) {
1354 // ignore for now
1355 return;
1356 }
1357 MethodCounters* mcs = method->method_counters();
1358 st->print("ciMethod ");
1359 dump_name_as_ascii(st);
1360 st->print_cr(" %d %d %d %d %d",
1361 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1362 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1363 interpreter_invocation_count(),
1364 interpreter_throwout_count(),
1365 _instructions_size);
1366 }
1367
1368 // ------------------------------------------------------------------
1369 // ciMethod::print_codes
1370 //
1371 // Print a range of the bytecodes for this method.
1372 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1373 check_is_loaded();
1374 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1375 }
1376
1377 // ------------------------------------------------------------------
1378 // ciMethod::print_name
1379 //
1380 // Print the name of this method, including signature and some flags.
1381 void ciMethod::print_name(outputStream* st) {
1382 check_is_loaded();
1383 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1384 }
1385
1386 // ------------------------------------------------------------------
1387 // ciMethod::print_short_name
1388 //
1389 // Print the name of this method, without signature.
1390 void ciMethod::print_short_name(outputStream* st) {
1391 if (is_loaded()) {
1392 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1393 } else {
1394 // Fall back if method is not loaded.
1395 holder()->print_name_on(st);
1396 st->print("::");
1397 name()->print_symbol_on(st);
1398 if (WizardMode)
1399 signature()->as_symbol()->print_symbol_on(st);
1400 }
1401 }
1402
1403 // ------------------------------------------------------------------
1404 // ciMethod::print_impl
1405 //
1406 // Implementation of the print method.
1407 void ciMethod::print_impl(outputStream* st) {
1408 ciMetadata::print_impl(st);
1409 st->print(" name=");
1410 name()->print_symbol_on(st);
1411 st->print(" holder=");
1412 holder()->print_name_on(st);
1413 st->print(" signature=");
1414 signature()->as_symbol()->print_symbol_on(st);
1415 if (is_loaded()) {
1416 st->print(" loaded=true");
1417 st->print(" arg_size=%d", arg_size());
1418 st->print(" flags=");
1419 flags().print_member_flags(st);
1420 } else {
1421 st->print(" loaded=false");
1422 }
1423 }
1424
1425 // ------------------------------------------------------------------
1426
1427 static BasicType erase_to_word_type(BasicType bt) {
1428 if (is_subword_type(bt)) return T_INT;
1429 if (is_reference_type(bt)) return T_OBJECT;
1430 if (bt == T_PRIMITIVE_OBJECT) return T_OBJECT;
1431 return bt;
1432 }
1433
1434 static bool basic_types_match(ciType* t1, ciType* t2) {
1435 if (t1 == t2) return true;
1436 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1437 }
1438
1439 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1440 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1441 !resolved_method->is_method_handle_intrinsic();
1442
1443 if (!invoke_through_mh_intrinsic) {
1444 // Method name & descriptor should stay the same.
1445 // Signatures may reference unloaded types and thus they may be not strictly equal.
1446 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1447 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1448
1449 return (declared_method->name()->equals(resolved_method->name())) &&
1450 (declared_signature->equals(resolved_signature));
1451 }
1452
1453 ciMethod* linker = declared_method;
1454 ciMethod* target = resolved_method;
1455 // Linkers have appendix argument which is not passed to callee.
1456 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1457 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1458 return false; // argument slot count mismatch
1459 }
1460
1461 ciSignature* linker_sig = linker->signature();
1462 ciSignature* target_sig = target->signature();
1463
1464 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1465 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1466 return false; // argument count mismatch
1467 }
1468
1469 int sbase = 0, rbase = 0;
1470 switch (linker->intrinsic_id()) {
1471 case vmIntrinsics::_linkToVirtual:
1472 case vmIntrinsics::_linkToInterface:
1473 case vmIntrinsics::_linkToSpecial: {
1474 if (target->is_static()) {
1475 return false;
1476 }
1477 if (linker_sig->type_at(0)->is_primitive_type()) {
1478 return false; // receiver should be an oop
1479 }
1480 sbase = 1; // skip receiver
1481 break;
1482 }
1483 case vmIntrinsics::_linkToStatic: {
1484 if (!target->is_static()) {
1485 return false;
1486 }
1487 break;
1488 }
1489 case vmIntrinsics::_invokeBasic: {
1490 if (target->is_static()) {
1491 if (target_sig->type_at(0)->is_primitive_type()) {
1492 return false; // receiver should be an oop
1493 }
1494 rbase = 1; // skip receiver
1495 }
1496 break;
1497 }
1498 default:
1499 break;
1500 }
1501 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1502 int arg_count = target_sig->count() - rbase;
1503 for (int i = 0; i < arg_count; i++) {
1504 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1505 return false;
1506 }
1507 }
1508 // Only check the return type if the symbolic info has non-void return type.
1509 // I.e. the return value of the resolved method can be dropped.
1510 if (!linker->return_type()->is_void() &&
1511 !basic_types_match(linker->return_type(), target->return_type())) {
1512 return false;
1513 }
1514 return true; // no mismatch found
1515 }
1516
1517 // ------------------------------------------------------------------
1518
1519 bool ciMethod::is_scalarized_arg(int idx) const {
1520 VM_ENTRY_MARK;
1521 return get_Method()->is_scalarized_arg(idx);
1522 }
1523
1524 bool ciMethod::has_scalarized_args() const {
1525 VM_ENTRY_MARK;
1526 return get_Method()->has_scalarized_args();
1527 }
1528
1529 const GrowableArray<SigEntry>* ciMethod::get_sig_cc() const {
1530 VM_ENTRY_MARK;
1531 if (get_Method()->adapter() == NULL) {
1532 return NULL;
1533 }
1534 return get_Method()->adapter()->get_sig_cc();
1535 }