1 /*
2 * Copyright (c) 1999, 2019, 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/ciUtilities.inline.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "compiler/abstractCompiler.hpp"
38 #include "compiler/methodLiveness.hpp"
39 #include "interpreter/interpreter.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/oopMapCache.hpp"
42 #include "memory/allocation.inline.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "oops/generateOopMap.hpp"
45 #include "oops/method.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "utilities/bitMap.inline.hpp"
51 #include "utilities/xmlstream.hpp"
52 #ifdef COMPILER2
53 #include "ci/bcEscapeAnalyzer.hpp"
54 #include "ci/ciTypeFlow.hpp"
55 #include "oops/method.hpp"
56 #endif
57
58 // ciMethod
59 //
60 // This class represents a Method* in the HotSpot virtual
61 // machine.
62
63
64 // ------------------------------------------------------------------
65 // ciMethod::ciMethod
66 //
67 // Loaded method.
68 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
69 ciMetadata(h_m()),
70 _holder(holder)
71 {
72 assert(h_m() != NULL, "no null method");
73
74 if (LogTouchedMethods) {
75 h_m()->log_touched(Thread::current());
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 _intrinsic_id = h_m()->intrinsic_id();
85 _handler_count = h_m()->exception_table_length();
86 _size_of_parameters = h_m()->size_of_parameters();
87 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
88 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
89 _is_c1_compilable = !h_m()->is_not_c1_compilable();
90 _is_c2_compilable = !h_m()->is_not_c2_compilable();
91 _can_be_parsed = true;
92 _has_reserved_stack_access = h_m()->has_reserved_stack_access();
93 _is_overpass = h_m()->is_overpass();
94 // Lazy fields, filled in on demand. Require allocation.
95 _code = NULL;
96 _exception_handlers = NULL;
97 _liveness = NULL;
98 _method_blocks = NULL;
99 #if defined(COMPILER2)
100 _flow = NULL;
101 _bcea = NULL;
102 #endif // COMPILER2
103
104 ciEnv *env = CURRENT_ENV;
105 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
106 // 6328518 check hotswap conditions under the right lock.
107 MutexLocker locker(Compile_lock);
108 if (Dependencies::check_evol_method(h_m()) != NULL) {
109 _is_c1_compilable = false;
110 _is_c2_compilable = false;
111 _can_be_parsed = false;
112 }
113 } else {
114 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
115 }
116
117 if (h_m()->method_holder()->is_linked()) {
118 _can_be_statically_bound = h_m()->can_be_statically_bound();
119 } else {
120 // Have to use a conservative value in this case.
121 _can_be_statically_bound = false;
122 }
123
124 // Adjust the definition of this condition to be more useful:
125 // %%% take these conditions into account in vtable generation
126 if (!_can_be_statically_bound && h_m()->is_private())
127 _can_be_statically_bound = true;
128 if (_can_be_statically_bound && h_m()->is_abstract())
129 _can_be_statically_bound = false;
130
131 // generating _signature may allow GC and therefore move m.
132 // These fields are always filled in.
133 _name = env->get_symbol(h_m()->name());
134 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
135 constantPoolHandle cpool = h_m()->constants();
136 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
137 _method_data = NULL;
138 _nmethod_age = h_m()->nmethod_age();
139 // Take a snapshot of these values, so they will be commensurate with the MDO.
140 if (ProfileInterpreter || TieredCompilation) {
141 int invcnt = h_m()->interpreter_invocation_count();
142 // if the value overflowed report it as max int
143 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
144 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
145 } else {
146 _interpreter_invocation_count = 0;
147 _interpreter_throwout_count = 0;
148 }
149 if (_interpreter_invocation_count == 0)
150 _interpreter_invocation_count = 1;
151 _instructions_size = -1;
152 #ifdef ASSERT
153 if (ReplayCompiles) {
154 ciReplay::initialize(this);
155 }
156 #endif
157 }
158
159
160 // ------------------------------------------------------------------
161 // ciMethod::ciMethod
162 //
163 // Unloaded method.
164 ciMethod::ciMethod(ciInstanceKlass* holder,
165 ciSymbol* name,
166 ciSymbol* signature,
167 ciInstanceKlass* accessor) :
168 ciMetadata((Metadata*)NULL),
169 _name( name),
170 _holder( holder),
171 _method_data( NULL),
172 _method_blocks( NULL),
173 _intrinsic_id( vmIntrinsics::_none),
174 _instructions_size(-1),
175 _can_be_statically_bound(false),
176 _liveness( NULL)
177 #if defined(COMPILER2)
178 ,
179 _flow( NULL),
180 _bcea( NULL)
181 #endif // COMPILER2
182 {
183 // Usually holder and accessor are the same type but in some cases
184 // the holder has the wrong class loader (e.g. invokedynamic call
185 // sites) so we pass the accessor.
186 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
187 }
188
189
190 // ------------------------------------------------------------------
191 // ciMethod::load_code
192 //
193 // Load the bytecodes and exception handler table for this method.
194 void ciMethod::load_code() {
195 VM_ENTRY_MARK;
196 assert(is_loaded(), "only loaded methods have code");
197
198 Method* me = get_Method();
199 Arena* arena = CURRENT_THREAD_ENV->arena();
200
201 // Load the bytecodes.
202 _code = (address)arena->Amalloc(code_size());
203 memcpy(_code, me->code_base(), code_size());
204
205 #if INCLUDE_JVMTI
206 // Revert any breakpoint bytecodes in ci's copy
207 if (me->number_of_breakpoints() > 0) {
208 BreakpointInfo* bp = me->method_holder()->breakpoints();
209 for (; bp != NULL; bp = bp->next()) {
210 if (bp->match(me)) {
211 code_at_put(bp->bci(), bp->orig_bytecode());
212 }
213 }
214 }
215 #endif
216
217 // And load the exception table.
218 ExceptionTable exc_table(me);
219
220 // Allocate one extra spot in our list of exceptions. This
221 // last entry will be used to represent the possibility that
222 // an exception escapes the method. See ciExceptionHandlerStream
223 // for details.
224 _exception_handlers =
225 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
226 * (_handler_count + 1));
227 if (_handler_count > 0) {
228 for (int i=0; i<_handler_count; i++) {
229 _exception_handlers[i] = new (arena) ciExceptionHandler(
230 holder(),
231 /* start */ exc_table.start_pc(i),
232 /* limit */ exc_table.end_pc(i),
233 /* goto pc */ exc_table.handler_pc(i),
234 /* cp index */ exc_table.catch_type_index(i));
235 }
236 }
237
238 // Put an entry at the end of our list to represent the possibility
239 // of exceptional exit.
240 _exception_handlers[_handler_count] =
241 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
242
243 if (CIPrintMethodCodes) {
244 print_codes();
245 }
246 }
247
248
249 // ------------------------------------------------------------------
250 // ciMethod::has_linenumber_table
251 //
252 // length unknown until decompression
253 bool ciMethod::has_linenumber_table() const {
254 check_is_loaded();
255 VM_ENTRY_MARK;
256 return get_Method()->has_linenumber_table();
257 }
258
259
260 // ------------------------------------------------------------------
261 // ciMethod::compressed_linenumber_table
262 u_char* ciMethod::compressed_linenumber_table() const {
263 check_is_loaded();
264 VM_ENTRY_MARK;
265 return get_Method()->compressed_linenumber_table();
266 }
267
268
269 // ------------------------------------------------------------------
270 // ciMethod::line_number_from_bci
271 int ciMethod::line_number_from_bci(int bci) const {
272 check_is_loaded();
273 VM_ENTRY_MARK;
274 return get_Method()->line_number_from_bci(bci);
275 }
276
277
278 // ------------------------------------------------------------------
279 // ciMethod::vtable_index
280 //
281 // Get the position of this method's entry in the vtable, if any.
282 int ciMethod::vtable_index() {
283 check_is_loaded();
284 assert(holder()->is_linked(), "must be linked");
285 VM_ENTRY_MARK;
286 return get_Method()->vtable_index();
287 }
288
289
290 // ------------------------------------------------------------------
291 // ciMethod::native_entry
292 //
293 // Get the address of this method's native code, if any.
294 address ciMethod::native_entry() {
295 check_is_loaded();
296 assert(flags().is_native(), "must be native method");
297 VM_ENTRY_MARK;
298 Method* method = get_Method();
299 address entry = method->native_function();
300 assert(entry != NULL, "must be valid entry point");
301 return entry;
302 }
303
304
305 // ------------------------------------------------------------------
306 // ciMethod::interpreter_entry
307 //
308 // Get the entry point for running this method in the interpreter.
309 address ciMethod::interpreter_entry() {
310 check_is_loaded();
311 VM_ENTRY_MARK;
312 methodHandle mh(THREAD, get_Method());
313 return Interpreter::entry_for_method(mh);
314 }
315
316
317 // ------------------------------------------------------------------
318 // ciMethod::uses_balanced_monitors
319 //
320 // Does this method use monitors in a strict stack-disciplined manner?
321 bool ciMethod::has_balanced_monitors() {
322 check_is_loaded();
323 if (_balanced_monitors) return true;
324
325 // Analyze the method to see if monitors are used properly.
326 VM_ENTRY_MARK;
327 methodHandle method(THREAD, get_Method());
328 assert(method->has_monitor_bytecodes(), "should have checked this");
329
330 // Check to see if a previous compilation computed the
331 // monitor-matching analysis.
332 if (method->guaranteed_monitor_matching()) {
333 _balanced_monitors = true;
334 return true;
335 }
336
337 {
338 EXCEPTION_MARK;
339 ResourceMark rm(THREAD);
340 GeneratePairingInfo gpi(method);
341 gpi.compute_map(CATCH);
342 if (!gpi.monitor_safe()) {
343 return false;
344 }
345 method->set_guaranteed_monitor_matching();
346 _balanced_monitors = true;
347 }
348 return true;
349 }
350
351
352 // ------------------------------------------------------------------
353 // ciMethod::get_flow_analysis
354 ciTypeFlow* ciMethod::get_flow_analysis() {
355 #if defined(COMPILER2)
356 if (_flow == NULL) {
357 ciEnv* env = CURRENT_ENV;
358 _flow = new (env->arena()) ciTypeFlow(env, this);
359 _flow->do_flow();
360 }
361 return _flow;
362 #else // COMPILER2
363 ShouldNotReachHere();
364 return NULL;
365 #endif // COMPILER2
366 }
367
368
369 // ------------------------------------------------------------------
370 // ciMethod::get_osr_flow_analysis
371 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
372 #if defined(COMPILER2)
373 // OSR entry points are always place after a call bytecode of some sort
374 assert(osr_bci >= 0, "must supply valid OSR entry point");
375 ciEnv* env = CURRENT_ENV;
376 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
377 flow->do_flow();
378 return flow;
379 #else // COMPILER2
380 ShouldNotReachHere();
381 return NULL;
382 #endif // COMPILER2
383 }
384
385 // ------------------------------------------------------------------
386 // ciMethod::raw_liveness_at_bci
387 //
388 // Which local variables are live at a specific bci?
389 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
390 check_is_loaded();
391 if (_liveness == NULL) {
392 // Create the liveness analyzer.
393 Arena* arena = CURRENT_ENV->arena();
394 _liveness = new (arena) MethodLiveness(arena, this);
395 _liveness->compute_liveness();
396 }
397 return _liveness->get_liveness_at(bci);
398 }
399
400 // ------------------------------------------------------------------
401 // ciMethod::liveness_at_bci
402 //
403 // Which local variables are live at a specific bci? When debugging
404 // will return true for all locals in some cases to improve debug
405 // information.
406 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
407 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
408 // Keep all locals live for the user's edification and amusement.
409 MethodLivenessResult result(_max_locals);
410 result.set_range(0, _max_locals);
411 result.set_is_valid();
412 return result;
413 }
414 return raw_liveness_at_bci(bci);
415 }
416
417 // ciMethod::live_local_oops_at_bci
418 //
419 // find all the live oops in the locals array for a particular bci
420 // Compute what the interpreter believes by using the interpreter
421 // oopmap generator. This is used as a double check during osr to
422 // guard against conservative result from MethodLiveness making us
423 // think a dead oop is live. MethodLiveness is conservative in the
424 // sense that it may consider locals to be live which cannot be live,
425 // like in the case where a local could contain an oop or a primitive
426 // along different paths. In that case the local must be dead when
427 // those paths merge. Since the interpreter's viewpoint is used when
428 // gc'ing an interpreter frame we need to use its viewpoint during
429 // OSR when loading the locals.
430
431 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
432 VM_ENTRY_MARK;
433 InterpreterOopMap mask;
434 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
435 int mask_size = max_locals();
436 ResourceBitMap result(mask_size);
437 int i;
438 for (i = 0; i < mask_size ; i++ ) {
439 if (mask.is_oop(i)) result.set_bit(i);
440 }
441 return result;
442 }
443
444
445 #ifdef COMPILER1
446 // ------------------------------------------------------------------
447 // ciMethod::bci_block_start
448 //
449 // Marks all bcis where a new basic block starts
450 const BitMap& ciMethod::bci_block_start() {
451 check_is_loaded();
452 if (_liveness == NULL) {
453 // Create the liveness analyzer.
454 Arena* arena = CURRENT_ENV->arena();
455 _liveness = new (arena) MethodLiveness(arena, this);
456 _liveness->compute_liveness();
457 }
458
459 return _liveness->get_bci_block_start();
460 }
461 #endif // COMPILER1
462
463
464 // ------------------------------------------------------------------
465 // ciMethod::saturated_add_int
466 //
467 // Update profile counters with saturating addition
468 // Wil check and handle the overflow condition
469 int ciMethod::saturated_add_int(int a, int b) {
470 jlong sum = a + b;
471 if (sum > max_jint) {
472 sum = max_jint;
473 } else if (sum < min_jint) {
474 sum = min_jint;
475 }
476
477 return (int)sum;
478 }
479
480
481 // ------------------------------------------------------------------
482 // ciMethod::call_profile_at_bci
483 //
484 // Get the ciCallProfile for the invocation of this method.
485 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
486 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
487 ResourceMark rm;
488 ciCallProfile result;
489 if (method_data() != NULL && method_data()->is_mature()) {
490 ciProfileData* data = method_data()->bci_to_data(bci);
491 if (data != NULL && data->is_CounterData()) {
492 // Every profiled call site has a counter.
493 int count = data->as_CounterData()->count();
494
495 if (!data->is_ReceiverTypeData()) {
496 result._receiver_count[0] = 0; // that's a definite zero
497 } else { // ReceiverTypeData is a subclass of CounterData
498 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
499 // In addition, virtual call sites have receiver type information
500 int receivers_count_total = 0;
501 int morphism = 0;
502 // Precompute morphism for the possible fixup
503 for (uint i = 0; i < call->row_limit(); i++) {
504 ciKlass* receiver = call->receiver(i);
505 if (receiver == NULL) continue;
506 morphism++;
507 }
508 int epsilon = 0;
509 if (TieredCompilation) {
510 // For a call, it is assumed that either the type of the receiver(s)
511 // is recorded or an associated counter is incremented, but not both. With
512 // tiered compilation, however, both can happen due to the interpreter and
513 // C1 profiling invocations differently. Address that inconsistency here.
514 if (morphism == 1 && count > 0) {
515 epsilon = count;
516 count = 0;
517 }
518 }
519 for (uint i = 0; i < call->row_limit(); i++) {
520 ciKlass* receiver = call->receiver(i);
521 if (receiver == NULL) continue;
522 int rcount = saturated_add_int(call->receiver_count(i), epsilon);
523 if (rcount == 0) rcount = 1; // Should be valid value
524 receivers_count_total = saturated_add_int(receivers_count_total, rcount);
525 // Add the receiver to result data.
526 result.add_receiver(receiver, rcount);
527 // If we extend profiling to record methods,
528 // we will set result._method also.
529 }
530 // Determine call site's morphism.
531 // The call site count is 0 with known morphism (only 1 or 2 receivers)
532 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
533 // The call site count is > 0 in the case of a polymorphic virtual call.
534 if (morphism > 0 && morphism == result._limit) {
535 // The morphism <= MorphismLimit.
536 if ((morphism < ciCallProfile::MorphismLimit) ||
537 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
538 #ifdef ASSERT
539 if (count > 0) {
540 this->print_short_name(tty);
541 tty->print_cr(" @ bci:%d", bci);
542 this->print_codes();
543 assert(false, "this call site should not be polymorphic");
544 }
545 #endif
546 result._morphism = morphism;
547 }
548 }
549 // Make the count consistent if this is a call profile. If count is
550 // zero or less, presume that this is a typecheck profile and
551 // do nothing. Otherwise, increase count to be the sum of all
552 // receiver's counts.
553 if (count >= 0) {
554 count = saturated_add_int(count, receivers_count_total);
555 }
556 }
557 result._count = count;
558 }
559 }
560 return result;
561 }
562
563 // ------------------------------------------------------------------
564 // Add new receiver and sort data by receiver's profile count.
565 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
566 // Add new receiver and sort data by receiver's counts when we have space
567 // for it otherwise replace the less called receiver (less called receiver
568 // is placed to the last array element which is not used).
569 // First array's element contains most called receiver.
570 int i = _limit;
571 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
572 _receiver[i] = _receiver[i-1];
573 _receiver_count[i] = _receiver_count[i-1];
574 }
575 _receiver[i] = receiver;
576 _receiver_count[i] = receiver_count;
577 if (_limit < MorphismLimit) _limit++;
578 }
579
580
581 void ciMethod::assert_virtual_call_type_ok(int bci) {
582 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
583 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
584 }
585
586 void ciMethod::assert_call_type_ok(int bci) {
587 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
588 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
589 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
590 }
591
592 /**
593 * Check whether profiling provides a type for the argument i to the
594 * call at bci bci
595 *
596 * @param [in]bci bci of the call
597 * @param [in]i argument number
598 * @param [out]type profiled type of argument, NULL if none
599 * @param [out]ptr_kind whether always null, never null or maybe null
600 * @return true if profiling exists
601 *
602 */
603 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
604 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
605 ciProfileData* data = method_data()->bci_to_data(bci);
606 if (data != NULL) {
607 if (data->is_VirtualCallTypeData()) {
608 assert_virtual_call_type_ok(bci);
609 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
610 if (i >= call->number_of_arguments()) {
611 return false;
612 }
613 type = call->valid_argument_type(i);
614 ptr_kind = call->argument_ptr_kind(i);
615 return true;
616 } else if (data->is_CallTypeData()) {
617 assert_call_type_ok(bci);
618 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
619 if (i >= call->number_of_arguments()) {
620 return false;
621 }
622 type = call->valid_argument_type(i);
623 ptr_kind = call->argument_ptr_kind(i);
624 return true;
625 }
626 }
627 }
628 return false;
629 }
630
631 /**
632 * Check whether profiling provides a type for the return value from
633 * the call at bci bci
634 *
635 * @param [in]bci bci of the call
636 * @param [out]type profiled type of argument, NULL if none
637 * @param [out]ptr_kind whether always null, never null or maybe null
638 * @return true if profiling exists
639 *
640 */
641 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
642 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
643 ciProfileData* data = method_data()->bci_to_data(bci);
644 if (data != NULL) {
645 if (data->is_VirtualCallTypeData()) {
646 assert_virtual_call_type_ok(bci);
647 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
648 if (call->has_return()) {
649 type = call->valid_return_type();
650 ptr_kind = call->return_ptr_kind();
651 return true;
652 }
653 } else if (data->is_CallTypeData()) {
654 assert_call_type_ok(bci);
655 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
656 if (call->has_return()) {
657 type = call->valid_return_type();
658 ptr_kind = call->return_ptr_kind();
659 }
660 return true;
661 }
662 }
663 }
664 return false;
665 }
666
667 /**
668 * Check whether profiling provides a type for the parameter i
669 *
670 * @param [in]i parameter number
671 * @param [out]type profiled type of parameter, NULL if none
672 * @param [out]ptr_kind whether always null, never null or maybe null
673 * @return true if profiling exists
674 *
675 */
676 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
677 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
678 ciParametersTypeData* parameters = method_data()->parameters_type_data();
679 if (parameters != NULL && i < parameters->number_of_parameters()) {
680 type = parameters->valid_parameter_type(i);
681 ptr_kind = parameters->parameter_ptr_kind(i);
682 return true;
683 }
684 }
685 return false;
686 }
687
688
689 // ------------------------------------------------------------------
690 // ciMethod::find_monomorphic_target
691 //
692 // Given a certain calling environment, find the monomorphic target
693 // for the call. Return NULL if the call is not monomorphic in
694 // its calling environment, or if there are only abstract methods.
695 // The returned method is never abstract.
696 // Note: If caller uses a non-null result, it must inform dependencies
697 // via assert_unique_concrete_method or assert_leaf_type.
698 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
699 ciInstanceKlass* callee_holder,
700 ciInstanceKlass* actual_recv,
701 bool check_access) {
702 check_is_loaded();
703
704 if (actual_recv->is_interface()) {
705 // %%% We cannot trust interface types, yet. See bug 6312651.
706 return NULL;
707 }
708
709 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
710 if (root_m == NULL) {
711 // Something went wrong looking up the actual receiver method.
712 return NULL;
713 }
714 assert(!root_m->is_abstract(), "resolve_invoke promise");
715
716 // Make certain quick checks even if UseCHA is false.
717
718 // Is it private or final?
719 if (root_m->can_be_statically_bound()) {
720 return root_m;
721 }
722
723 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
724 // Easy case. There is no other place to put a method, so don't bother
725 // to go through the VM_ENTRY_MARK and all the rest.
726 return root_m;
727 }
728
729 // Array methods (clone, hashCode, etc.) are always statically bound.
730 // If we were to see an array type here, we'd return root_m.
731 // However, this method processes only ciInstanceKlasses. (See 4962591.)
732 // The inline_native_clone intrinsic narrows Object to T[] properly,
733 // so there is no need to do the same job here.
734
735 if (!UseCHA) return NULL;
736
737 VM_ENTRY_MARK;
738
739 // Disable CHA for default methods for now
740 if (root_m->is_default_method()) {
741 return NULL;
742 }
743
744 methodHandle target;
745 {
746 MutexLocker locker(Compile_lock);
747 Klass* context = actual_recv->get_Klass();
748 target = Dependencies::find_unique_concrete_method(context,
749 root_m->get_Method());
750 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
751 }
752
753 #ifndef PRODUCT
754 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
755 tty->print("found a non-root unique target method");
756 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
757 tty->print(" method = ");
758 target->print_short_name(tty);
759 tty->cr();
760 }
761 #endif //PRODUCT
762
763 if (target() == NULL) {
764 return NULL;
765 }
766 if (target() == root_m->get_Method()) {
767 return root_m;
768 }
769 if (!root_m->is_public() &&
770 !root_m->is_protected()) {
771 // If we are going to reason about inheritance, it's easiest
772 // if the method in question is public, protected, or private.
773 // If the answer is not root_m, it is conservatively correct
774 // to return NULL, even if the CHA encountered irrelevant
775 // methods in other packages.
776 // %%% TO DO: Work out logic for package-private methods
777 // with the same name but different vtable indexes.
778 return NULL;
779 }
780 assert(!target()->is_abstract(), "not allowed");
781 return CURRENT_THREAD_ENV->get_method(target());
782 }
783
784 // ------------------------------------------------------------------
785 // ciMethod::can_be_statically_bound
786 //
787 // Tries to determine whether a method can be statically bound in some context.
788 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
789 return (holder() == context) && can_be_statically_bound();
790 }
791
792 // ------------------------------------------------------------------
793 // ciMethod::resolve_invoke
794 //
795 // Given a known receiver klass, find the target for the call.
796 // Return NULL if the call has no target or the target is abstract.
797 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
798 check_is_loaded();
799 VM_ENTRY_MARK;
800
801 Klass* caller_klass = caller->get_Klass();
802 Klass* recv = exact_receiver->get_Klass();
803 Klass* resolved = holder()->get_Klass();
804 Symbol* h_name = name()->get_symbol();
805 Symbol* h_signature = signature()->get_symbol();
806
807 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
808 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
809 methodHandle m;
810 // Only do exact lookup if receiver klass has been linked. Otherwise,
811 // the vtable has not been setup, and the LinkResolver will fail.
812 if (recv->is_array_klass()
813 ||
814 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
815 if (holder()->is_interface()) {
816 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
817 } else {
818 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
819 }
820 }
821
822 if (m.is_null()) {
823 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
824 return NULL;
825 }
826
827 ciMethod* result = this;
828 if (m() != get_Method()) {
829 result = CURRENT_THREAD_ENV->get_method(m());
830 }
831
832 // Don't return abstract methods because they aren't
833 // optimizable or interesting.
834 if (result->is_abstract()) {
835 return NULL;
836 } else {
837 return result;
838 }
839 }
840
841 // ------------------------------------------------------------------
842 // ciMethod::resolve_vtable_index
843 //
844 // Given a known receiver klass, find the vtable index for the call.
845 // Return Method::invalid_vtable_index if the vtable_index is unknown.
846 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
847 check_is_loaded();
848
849 int vtable_index = Method::invalid_vtable_index;
850 // Only do lookup if receiver klass has been linked. Otherwise,
851 // the vtable has not been setup, and the LinkResolver will fail.
852 if (!receiver->is_interface()
853 && (!receiver->is_instance_klass() ||
854 receiver->as_instance_klass()->is_linked())) {
855 VM_ENTRY_MARK;
856
857 Klass* caller_klass = caller->get_Klass();
858 Klass* recv = receiver->get_Klass();
859 Symbol* h_name = name()->get_symbol();
860 Symbol* h_signature = signature()->get_symbol();
861
862 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
863 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
864 if (vtable_index == Method::nonvirtual_vtable_index) {
865 // A statically bound method. Return "no such index".
866 vtable_index = Method::invalid_vtable_index;
867 }
868 }
869
870 return vtable_index;
871 }
872
873 // ------------------------------------------------------------------
874 // ciMethod::interpreter_call_site_count
875 int ciMethod::interpreter_call_site_count(int bci) {
876 if (method_data() != NULL) {
877 ResourceMark rm;
878 ciProfileData* data = method_data()->bci_to_data(bci);
879 if (data != NULL && data->is_CounterData()) {
880 return scale_count(data->as_CounterData()->count());
881 }
882 }
883 return -1; // unknown
884 }
885
886 // ------------------------------------------------------------------
887 // ciMethod::get_field_at_bci
888 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
889 ciBytecodeStream iter(this);
890 iter.reset_to_bci(bci);
891 iter.next();
892 return iter.get_field(will_link);
893 }
894
895 // ------------------------------------------------------------------
896 // ciMethod::get_method_at_bci
897 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
898 ciBytecodeStream iter(this);
899 iter.reset_to_bci(bci);
900 iter.next();
901 return iter.get_method(will_link, declared_signature);
902 }
903
904 // ------------------------------------------------------------------
905 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
906 ciBytecodeStream iter(this);
907 iter.reset_to_bci(bci);
908 iter.next();
909 return iter.get_declared_method_holder();
910 }
911
912 // ------------------------------------------------------------------
913 // Adjust a CounterData count to be commensurate with
914 // interpreter_invocation_count. If the MDO exists for
915 // only 25% of the time the method exists, then the
916 // counts in the MDO should be scaled by 4X, so that
917 // they can be usefully and stably compared against the
918 // invocation counts in methods.
919 int ciMethod::scale_count(int count, float prof_factor) {
920 if (count > 0 && method_data() != NULL) {
921 int counter_life;
922 int method_life = interpreter_invocation_count();
923 if (TieredCompilation) {
924 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
925 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
926 } else {
927 int current_mileage = method_data()->current_mileage();
928 int creation_mileage = method_data()->creation_mileage();
929 counter_life = current_mileage - creation_mileage;
930 }
931
932 // counter_life due to backedge_counter could be > method_life
933 if (counter_life > method_life)
934 counter_life = method_life;
935 if (0 < counter_life && counter_life <= method_life) {
936 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
937 count = (count > 0) ? count : 1;
938 }
939 }
940 return count;
941 }
942
943
944 // ------------------------------------------------------------------
945 // ciMethod::is_special_get_caller_class_method
946 //
947 bool ciMethod::is_ignored_by_security_stack_walk() const {
948 check_is_loaded();
949 VM_ENTRY_MARK;
950 return get_Method()->is_ignored_by_security_stack_walk();
951 }
952
953
954 // ------------------------------------------------------------------
955 // invokedynamic support
956
957 // ------------------------------------------------------------------
958 // ciMethod::is_method_handle_intrinsic
959 //
960 // Return true if the method is an instance of the JVM-generated
961 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
962 bool ciMethod::is_method_handle_intrinsic() const {
963 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
964 return (MethodHandles::is_signature_polymorphic(iid) &&
965 MethodHandles::is_signature_polymorphic_intrinsic(iid));
966 }
967
968 // ------------------------------------------------------------------
969 // ciMethod::is_compiled_lambda_form
970 //
971 // Return true if the method is a generated MethodHandle adapter.
972 // These are built by Java code.
973 bool ciMethod::is_compiled_lambda_form() const {
974 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
975 return iid == vmIntrinsics::_compiledLambdaForm;
976 }
977
978 // ------------------------------------------------------------------
979 // ciMethod::is_object_initializer
980 //
981 bool ciMethod::is_object_initializer() const {
982 return name() == ciSymbol::object_initializer_name();
983 }
984
985 // ------------------------------------------------------------------
986 // ciMethod::has_member_arg
987 //
988 // Return true if the method is a linker intrinsic like _linkToVirtual.
989 // These are built by the JVM.
990 bool ciMethod::has_member_arg() const {
991 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
992 return (MethodHandles::is_signature_polymorphic(iid) &&
993 MethodHandles::has_member_arg(iid));
994 }
995
996 // ------------------------------------------------------------------
997 // ciMethod::ensure_method_data
998 //
999 // Generate new MethodData* objects at compile time.
1000 // Return true if allocation was successful or no MDO is required.
1001 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1002 EXCEPTION_CONTEXT;
1003 if (is_native() || is_abstract() || h_m()->is_accessor()) {
1004 return true;
1005 }
1006 if (h_m()->method_data() == NULL) {
1007 Method::build_interpreter_method_data(h_m, THREAD);
1008 if (HAS_PENDING_EXCEPTION) {
1009 CLEAR_PENDING_EXCEPTION;
1010 }
1011 }
1012 if (h_m()->method_data() != NULL) {
1013 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1014 _method_data->load_data();
1015 return true;
1016 } else {
1017 _method_data = CURRENT_ENV->get_empty_methodData();
1018 return false;
1019 }
1020 }
1021
1022 // public, retroactive version
1023 bool ciMethod::ensure_method_data() {
1024 bool result = true;
1025 if (_method_data == NULL || _method_data->is_empty()) {
1026 GUARDED_VM_ENTRY({
1027 result = ensure_method_data(get_Method());
1028 });
1029 }
1030 return result;
1031 }
1032
1033
1034 // ------------------------------------------------------------------
1035 // ciMethod::method_data
1036 //
1037 ciMethodData* ciMethod::method_data() {
1038 if (_method_data != NULL) {
1039 return _method_data;
1040 }
1041 VM_ENTRY_MARK;
1042 ciEnv* env = CURRENT_ENV;
1043 Thread* my_thread = JavaThread::current();
1044 methodHandle h_m(my_thread, get_Method());
1045
1046 if (h_m()->method_data() != NULL) {
1047 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1048 _method_data->load_data();
1049 } else {
1050 _method_data = CURRENT_ENV->get_empty_methodData();
1051 }
1052 return _method_data;
1053
1054 }
1055
1056 // ------------------------------------------------------------------
1057 // ciMethod::method_data_or_null
1058 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1059 // NULL otherwise.
1060 ciMethodData* ciMethod::method_data_or_null() {
1061 ciMethodData *md = method_data();
1062 if (md->is_empty()) {
1063 return NULL;
1064 }
1065 return md;
1066 }
1067
1068 // ------------------------------------------------------------------
1069 // ciMethod::ensure_method_counters
1070 //
1071 MethodCounters* ciMethod::ensure_method_counters() {
1072 check_is_loaded();
1073 VM_ENTRY_MARK;
1074 methodHandle mh(THREAD, get_Method());
1075 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1076 return method_counters;
1077 }
1078
1079 // ------------------------------------------------------------------
1080 // ciMethod::has_option
1081 //
1082 bool ciMethod::has_option(const char* option) {
1083 check_is_loaded();
1084 VM_ENTRY_MARK;
1085 methodHandle mh(THREAD, get_Method());
1086 return CompilerOracle::has_option_string(mh, option);
1087 }
1088
1089 // ------------------------------------------------------------------
1090 // ciMethod::has_option_value
1091 //
1092 bool ciMethod::has_option_value(const char* option, double& value) {
1093 check_is_loaded();
1094 VM_ENTRY_MARK;
1095 methodHandle mh(THREAD, get_Method());
1096 return CompilerOracle::has_option_value(mh, option, value);
1097 }
1098 // ------------------------------------------------------------------
1099 // ciMethod::can_be_compiled
1100 //
1101 // Have previous compilations of this method succeeded?
1102 bool ciMethod::can_be_compiled() {
1103 check_is_loaded();
1104 ciEnv* env = CURRENT_ENV;
1105 if (is_c1_compile(env->comp_level())) {
1106 return _is_c1_compilable;
1107 }
1108 return _is_c2_compilable;
1109 }
1110
1111 // ------------------------------------------------------------------
1112 // ciMethod::set_not_compilable
1113 //
1114 // Tell the VM that this method cannot be compiled at all.
1115 void ciMethod::set_not_compilable(const char* reason) {
1116 check_is_loaded();
1117 VM_ENTRY_MARK;
1118 ciEnv* env = CURRENT_ENV;
1119 if (is_c1_compile(env->comp_level())) {
1120 _is_c1_compilable = false;
1121 } else {
1122 _is_c2_compilable = false;
1123 }
1124 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1125 }
1126
1127 // ------------------------------------------------------------------
1128 // ciMethod::can_be_osr_compiled
1129 //
1130 // Have previous compilations of this method succeeded?
1131 //
1132 // Implementation note: the VM does not currently keep track
1133 // of failed OSR compilations per bci. The entry_bci parameter
1134 // is currently unused.
1135 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1136 check_is_loaded();
1137 VM_ENTRY_MARK;
1138 ciEnv* env = CURRENT_ENV;
1139 return !get_Method()->is_not_osr_compilable(env->comp_level());
1140 }
1141
1142 // ------------------------------------------------------------------
1143 // ciMethod::has_compiled_code
1144 bool ciMethod::has_compiled_code() {
1145 return instructions_size() > 0;
1146 }
1147
1148 int ciMethod::comp_level() {
1149 check_is_loaded();
1150 VM_ENTRY_MARK;
1151 CompiledMethod* nm = get_Method()->code();
1152 if (nm != NULL) return nm->comp_level();
1153 return 0;
1154 }
1155
1156 int ciMethod::highest_osr_comp_level() {
1157 check_is_loaded();
1158 VM_ENTRY_MARK;
1159 return get_Method()->highest_osr_comp_level();
1160 }
1161
1162 // ------------------------------------------------------------------
1163 // ciMethod::code_size_for_inlining
1164 //
1165 // Code size for inlining decisions. This method returns a code
1166 // size of 1 for methods which has the ForceInline annotation.
1167 int ciMethod::code_size_for_inlining() {
1168 check_is_loaded();
1169 if (get_Method()->force_inline()) {
1170 return 1;
1171 }
1172 return code_size();
1173 }
1174
1175 // ------------------------------------------------------------------
1176 // ciMethod::instructions_size
1177 //
1178 // This is a rough metric for "fat" methods, compared before inlining
1179 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1180 // junk like exception handler, stubs, and constant table, which are
1181 // not highly relevant to an inlined method. So we use the more
1182 // specific accessor nmethod::insts_size.
1183 int ciMethod::instructions_size() {
1184 if (_instructions_size == -1) {
1185 GUARDED_VM_ENTRY(
1186 CompiledMethod* code = get_Method()->code();
1187 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1188 _instructions_size = code->insts_end() - code->verified_entry_point();
1189 } else {
1190 _instructions_size = 0;
1191 }
1192 );
1193 }
1194 return _instructions_size;
1195 }
1196
1197 // ------------------------------------------------------------------
1198 // ciMethod::log_nmethod_identity
1199 void ciMethod::log_nmethod_identity(xmlStream* log) {
1200 GUARDED_VM_ENTRY(
1201 CompiledMethod* code = get_Method()->code();
1202 if (code != NULL) {
1203 code->log_identity(log);
1204 }
1205 )
1206 }
1207
1208 // ------------------------------------------------------------------
1209 // ciMethod::is_not_reached
1210 bool ciMethod::is_not_reached(int bci) {
1211 check_is_loaded();
1212 VM_ENTRY_MARK;
1213 return Interpreter::is_not_reached(
1214 methodHandle(THREAD, get_Method()), bci);
1215 }
1216
1217 // ------------------------------------------------------------------
1218 // ciMethod::was_never_executed
1219 bool ciMethod::was_executed_more_than(int times) {
1220 VM_ENTRY_MARK;
1221 return get_Method()->was_executed_more_than(times);
1222 }
1223
1224 // ------------------------------------------------------------------
1225 // ciMethod::has_unloaded_classes_in_signature
1226 bool ciMethod::has_unloaded_classes_in_signature() {
1227 VM_ENTRY_MARK;
1228 {
1229 EXCEPTION_MARK;
1230 methodHandle m(THREAD, get_Method());
1231 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1232 if( HAS_PENDING_EXCEPTION ) {
1233 CLEAR_PENDING_EXCEPTION;
1234 return true; // Declare that we may have unloaded classes
1235 }
1236 return has_unloaded;
1237 }
1238 }
1239
1240 // ------------------------------------------------------------------
1241 // ciMethod::is_klass_loaded
1242 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1243 VM_ENTRY_MARK;
1244 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1245 }
1246
1247 // ------------------------------------------------------------------
1248 // ciMethod::check_call
1249 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1250 // This method is used only in C2 from InlineTree::ok_to_inline,
1251 // and is only used under -Xcomp.
1252 // It appears to fail when applied to an invokeinterface call site.
1253 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1254 VM_ENTRY_MARK;
1255 {
1256 EXCEPTION_MARK;
1257 HandleMark hm(THREAD);
1258 constantPoolHandle pool (THREAD, get_Method()->constants());
1259 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1260 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1261 if (HAS_PENDING_EXCEPTION) {
1262 CLEAR_PENDING_EXCEPTION;
1263 return false;
1264 } else {
1265 return (spec_method->is_static() == is_static);
1266 }
1267 }
1268 return false;
1269 }
1270
1271 // ------------------------------------------------------------------
1272 // ciMethod::profile_aging
1273 //
1274 // Should the method be compiled with an age counter?
1275 bool ciMethod::profile_aging() const {
1276 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1277 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1278 }
1279 // ------------------------------------------------------------------
1280 // ciMethod::print_codes
1281 //
1282 // Print the bytecodes for this method.
1283 void ciMethod::print_codes_on(outputStream* st) {
1284 check_is_loaded();
1285 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1286 }
1287
1288
1289 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1290 check_is_loaded(); \
1291 VM_ENTRY_MARK; \
1292 return get_Method()->flag_accessor(); \
1293 }
1294
1295 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1296 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1297 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1298 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1299 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1300 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1301 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1302 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1303
1304 bool ciMethod::is_boxing_method() const {
1305 if (holder()->is_box_klass()) {
1306 switch (intrinsic_id()) {
1307 case vmIntrinsics::_Boolean_valueOf:
1308 case vmIntrinsics::_Byte_valueOf:
1309 case vmIntrinsics::_Character_valueOf:
1310 case vmIntrinsics::_Short_valueOf:
1311 case vmIntrinsics::_Integer_valueOf:
1312 case vmIntrinsics::_Long_valueOf:
1313 case vmIntrinsics::_Float_valueOf:
1314 case vmIntrinsics::_Double_valueOf:
1315 return true;
1316 default:
1317 return false;
1318 }
1319 }
1320 return false;
1321 }
1322
1323 bool ciMethod::is_unboxing_method() const {
1324 if (holder()->is_box_klass()) {
1325 switch (intrinsic_id()) {
1326 case vmIntrinsics::_booleanValue:
1327 case vmIntrinsics::_byteValue:
1328 case vmIntrinsics::_charValue:
1329 case vmIntrinsics::_shortValue:
1330 case vmIntrinsics::_intValue:
1331 case vmIntrinsics::_longValue:
1332 case vmIntrinsics::_floatValue:
1333 case vmIntrinsics::_doubleValue:
1334 return true;
1335 default:
1336 return false;
1337 }
1338 }
1339 return false;
1340 }
1341
1342 BCEscapeAnalyzer *ciMethod::get_bcea() {
1343 #ifdef COMPILER2
1344 if (_bcea == NULL) {
1345 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1346 }
1347 return _bcea;
1348 #else // COMPILER2
1349 ShouldNotReachHere();
1350 return NULL;
1351 #endif // COMPILER2
1352 }
1353
1354 ciMethodBlocks *ciMethod::get_method_blocks() {
1355 Arena *arena = CURRENT_ENV->arena();
1356 if (_method_blocks == NULL) {
1357 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1358 }
1359 return _method_blocks;
1360 }
1361
1362 #undef FETCH_FLAG_FROM_VM
1363
1364 void ciMethod::dump_name_as_ascii(outputStream* st) {
1365 Method* method = get_Method();
1366 st->print("%s %s %s",
1367 method->klass_name()->as_quoted_ascii(),
1368 method->name()->as_quoted_ascii(),
1369 method->signature()->as_quoted_ascii());
1370 }
1371
1372 void ciMethod::dump_replay_data(outputStream* st) {
1373 ResourceMark rm;
1374 Method* method = get_Method();
1375 MethodCounters* mcs = method->method_counters();
1376 st->print("ciMethod ");
1377 dump_name_as_ascii(st);
1378 st->print_cr(" %d %d %d %d %d",
1379 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1380 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1381 interpreter_invocation_count(),
1382 interpreter_throwout_count(),
1383 _instructions_size);
1384 }
1385
1386 // ------------------------------------------------------------------
1387 // ciMethod::print_codes
1388 //
1389 // Print a range of the bytecodes for this method.
1390 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1391 check_is_loaded();
1392 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1393 }
1394
1395 // ------------------------------------------------------------------
1396 // ciMethod::print_name
1397 //
1398 // Print the name of this method, including signature and some flags.
1399 void ciMethod::print_name(outputStream* st) {
1400 check_is_loaded();
1401 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1402 }
1403
1404 // ------------------------------------------------------------------
1405 // ciMethod::print_short_name
1406 //
1407 // Print the name of this method, without signature.
1408 void ciMethod::print_short_name(outputStream* st) {
1409 if (is_loaded()) {
1410 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1411 } else {
1412 // Fall back if method is not loaded.
1413 holder()->print_name_on(st);
1414 st->print("::");
1415 name()->print_symbol_on(st);
1416 if (WizardMode)
1417 signature()->as_symbol()->print_symbol_on(st);
1418 }
1419 }
1420
1421 // ------------------------------------------------------------------
1422 // ciMethod::print_impl
1423 //
1424 // Implementation of the print method.
1425 void ciMethod::print_impl(outputStream* st) {
1426 ciMetadata::print_impl(st);
1427 st->print(" name=");
1428 name()->print_symbol_on(st);
1429 st->print(" holder=");
1430 holder()->print_name_on(st);
1431 st->print(" signature=");
1432 signature()->as_symbol()->print_symbol_on(st);
1433 if (is_loaded()) {
1434 st->print(" loaded=true");
1435 st->print(" arg_size=%d", arg_size());
1436 st->print(" flags=");
1437 flags().print_member_flags(st);
1438 } else {
1439 st->print(" loaded=false");
1440 }
1441 }
1442
1443 // ------------------------------------------------------------------
1444
1445 static BasicType erase_to_word_type(BasicType bt) {
1446 if (is_subword_type(bt)) return T_INT;
1447 if (bt == T_ARRAY) return T_OBJECT;
1448 return bt;
1449 }
1450
1451 static bool basic_types_match(ciType* t1, ciType* t2) {
1452 if (t1 == t2) return true;
1453 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1454 }
1455
1456 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1457 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1458 !resolved_method->is_method_handle_intrinsic();
1459
1460 if (!invoke_through_mh_intrinsic) {
1461 // Method name & descriptor should stay the same.
1462 // Signatures may reference unloaded types and thus they may be not strictly equal.
1463 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1464 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1465
1466 return (declared_method->name()->equals(resolved_method->name())) &&
1467 (declared_signature->equals(resolved_signature));
1468 }
1469
1470 ciMethod* linker = declared_method;
1471 ciMethod* target = resolved_method;
1472 // Linkers have appendix argument which is not passed to callee.
1473 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1474 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1475 return false; // argument slot count mismatch
1476 }
1477
1478 ciSignature* linker_sig = linker->signature();
1479 ciSignature* target_sig = target->signature();
1480
1481 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1482 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1483 return false; // argument count mismatch
1484 }
1485
1486 int sbase = 0, rbase = 0;
1487 switch (linker->intrinsic_id()) {
1488 case vmIntrinsics::_linkToVirtual:
1489 case vmIntrinsics::_linkToInterface:
1490 case vmIntrinsics::_linkToSpecial: {
1491 if (target->is_static()) {
1492 return false;
1493 }
1494 if (linker_sig->type_at(0)->is_primitive_type()) {
1495 return false; // receiver should be an oop
1496 }
1497 sbase = 1; // skip receiver
1498 break;
1499 }
1500 case vmIntrinsics::_linkToStatic: {
1501 if (!target->is_static()) {
1502 return false;
1503 }
1504 break;
1505 }
1506 case vmIntrinsics::_invokeBasic: {
1507 if (target->is_static()) {
1508 if (target_sig->type_at(0)->is_primitive_type()) {
1509 return false; // receiver should be an oop
1510 }
1511 rbase = 1; // skip receiver
1512 }
1513 break;
1514 }
1515 default:
1516 break;
1517 }
1518 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1519 int arg_count = target_sig->count() - rbase;
1520 for (int i = 0; i < arg_count; i++) {
1521 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1522 return false;
1523 }
1524 }
1525 // Only check the return type if the symbolic info has non-void return type.
1526 // I.e. the return value of the resolved method can be dropped.
1527 if (!linker->return_type()->is_void() &&
1528 !basic_types_match(linker->return_type(), target->return_type())) {
1529 return false;
1530 }
1531 return true; // no mismatch found
1532 }
1533
1534 // ------------------------------------------------------------------