rev 55090 : secret-sfac
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 "runtime/sharedRuntime.hpp"
51 #include "utilities/bitMap.inline.hpp"
52 #include "utilities/xmlstream.hpp"
53 #ifdef COMPILER2
54 #include "ci/bcEscapeAnalyzer.hpp"
55 #include "ci/ciTypeFlow.hpp"
56 #include "oops/method.hpp"
57 #endif
58
59 // ciMethod
60 //
61 // This class represents a Method* in the HotSpot virtual
62 // machine.
63
64
65 // ------------------------------------------------------------------
66 // ciMethod::ciMethod
67 //
68 // Loaded method.
69 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
70 ciMetadata(h_m()),
71 _holder(holder)
72 {
73 assert(h_m() != NULL, "no null method");
74
75 if (LogTouchedMethods) {
76 h_m()->log_touched(Thread::current());
77 }
78 // These fields are always filled in in loaded methods.
79 _flags = ciFlags(h_m()->access_flags());
80
81 // Easy to compute, so fill them in now.
82 _max_stack = h_m()->max_stack();
83 _max_locals = h_m()->max_locals();
84 _code_size = h_m()->code_size();
85 _intrinsic_id = h_m()->intrinsic_id();
86 _handler_count = h_m()->exception_table_length();
87 _size_of_parameters = h_m()->size_of_parameters();
88 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
89 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
90 _is_c1_compilable = !h_m()->is_not_c1_compilable();
91 _is_c2_compilable = !h_m()->is_not_c2_compilable();
92 _can_be_parsed = true;
93 _has_reserved_stack_access = h_m()->has_reserved_stack_access();
94 _is_overpass = h_m()->is_overpass();
95 // Lazy fields, filled in on demand. Require allocation.
96 _code = NULL;
97 _exception_handlers = NULL;
98 _liveness = NULL;
99 _method_blocks = NULL;
100 #if defined(COMPILER2)
101 _flow = NULL;
102 _bcea = NULL;
103 #endif // COMPILER2
104
105 ciEnv *env = CURRENT_ENV;
106 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
107 // 6328518 check hotswap conditions under the right lock.
108 MutexLocker locker(Compile_lock);
109 if (Dependencies::check_evol_method(h_m()) != NULL) {
110 _is_c1_compilable = false;
111 _is_c2_compilable = false;
112 _can_be_parsed = false;
113 }
114 } else {
115 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
116 }
117
118 if (h_m()->method_holder()->is_linked()) {
119 _can_be_statically_bound = h_m()->can_be_statically_bound();
120 } else {
121 // Have to use a conservative value in this case.
122 _can_be_statically_bound = false;
123 }
124
125 // Adjust the definition of this condition to be more useful:
126 // %%% take these conditions into account in vtable generation
127 if (!_can_be_statically_bound && h_m()->is_private())
128 _can_be_statically_bound = true;
129 if (_can_be_statically_bound && h_m()->is_abstract())
130 _can_be_statically_bound = false;
131
132 // generating _signature may allow GC and therefore move m.
133 // These fields are always filled in.
134 _name = env->get_symbol(h_m()->name());
135 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
136 constantPoolHandle cpool = h_m()->constants();
137 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
138 _method_data = NULL;
139 _nmethod_age = h_m()->nmethod_age();
140 // Take a snapshot of these values, so they will be commensurate with the MDO.
141 if (ProfileInterpreter || TieredCompilation) {
142 int invcnt = h_m()->interpreter_invocation_count();
143 // if the value overflowed report it as max int
144 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
145 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
146 } else {
147 _interpreter_invocation_count = 0;
148 _interpreter_throwout_count = 0;
149 }
150 if (_interpreter_invocation_count == 0)
151 _interpreter_invocation_count = 1;
152 _instructions_size = -1;
153 #ifdef ASSERT
154 if (ReplayCompiles) {
155 ciReplay::initialize(this);
156 }
157 #endif
158 }
159
160
161 // ------------------------------------------------------------------
162 // ciMethod::ciMethod
163 //
164 // Unloaded method.
165 ciMethod::ciMethod(ciInstanceKlass* holder,
166 ciSymbol* name,
167 ciSymbol* signature,
168 ciInstanceKlass* accessor) :
169 ciMetadata((Metadata*)NULL),
170 _name( name),
171 _holder( holder),
172 _method_data( NULL),
173 _method_blocks( NULL),
174 _intrinsic_id( vmIntrinsics::_none),
175 _instructions_size(-1),
176 _can_be_statically_bound(false),
177 _liveness( NULL)
178 #if defined(COMPILER2)
179 ,
180 _flow( NULL),
181 _bcea( NULL)
182 #endif // COMPILER2
183 {
184 // Usually holder and accessor are the same type but in some cases
185 // the holder has the wrong class loader (e.g. invokedynamic call
186 // sites) so we pass the accessor.
187 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
188 }
189
190
191 // ------------------------------------------------------------------
192 // ciMethod::load_code
193 //
194 // Load the bytecodes and exception handler table for this method.
195 void ciMethod::load_code() {
196 VM_ENTRY_MARK;
197 assert(is_loaded(), "only loaded methods have code");
198
199 Method* me = get_Method();
200 Arena* arena = CURRENT_THREAD_ENV->arena();
201
202 // Load the bytecodes.
203 _code = (address)arena->Amalloc(code_size());
204 memcpy(_code, me->code_base(), code_size());
205
206 #if INCLUDE_JVMTI
207 // Revert any breakpoint bytecodes in ci's copy
208 if (me->number_of_breakpoints() > 0) {
209 BreakpointInfo* bp = me->method_holder()->breakpoints();
210 for (; bp != NULL; bp = bp->next()) {
211 if (bp->match(me)) {
212 code_at_put(bp->bci(), bp->orig_bytecode());
213 }
214 }
215 }
216 #endif
217
218 // And load the exception table.
219 ExceptionTable exc_table(me);
220
221 // Allocate one extra spot in our list of exceptions. This
222 // last entry will be used to represent the possibility that
223 // an exception escapes the method. See ciExceptionHandlerStream
224 // for details.
225 _exception_handlers =
226 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
227 * (_handler_count + 1));
228 if (_handler_count > 0) {
229 for (int i=0; i<_handler_count; i++) {
230 _exception_handlers[i] = new (arena) ciExceptionHandler(
231 holder(),
232 /* start */ exc_table.start_pc(i),
233 /* limit */ exc_table.end_pc(i),
234 /* goto pc */ exc_table.handler_pc(i),
235 /* cp index */ exc_table.catch_type_index(i));
236 }
237 }
238
239 // Put an entry at the end of our list to represent the possibility
240 // of exceptional exit.
241 _exception_handlers[_handler_count] =
242 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
243
244 if (CIPrintMethodCodes) {
245 print_codes();
246 }
247 }
248
249
250 // ------------------------------------------------------------------
251 // ciMethod::has_linenumber_table
252 //
253 // length unknown until decompression
254 bool ciMethod::has_linenumber_table() const {
255 check_is_loaded();
256 VM_ENTRY_MARK;
257 return get_Method()->has_linenumber_table();
258 }
259
260
261 // ------------------------------------------------------------------
262 // ciMethod::compressed_linenumber_table
263 u_char* ciMethod::compressed_linenumber_table() const {
264 check_is_loaded();
265 VM_ENTRY_MARK;
266 return get_Method()->compressed_linenumber_table();
267 }
268
269
270 // ------------------------------------------------------------------
271 // ciMethod::line_number_from_bci
272 int ciMethod::line_number_from_bci(int bci) const {
273 check_is_loaded();
274 VM_ENTRY_MARK;
275 return get_Method()->line_number_from_bci(bci);
276 }
277
278
279 // ------------------------------------------------------------------
280 // ciMethod::vtable_index
281 //
282 // Get the position of this method's entry in the vtable, if any.
283 int ciMethod::vtable_index() {
284 check_is_loaded();
285 assert(holder()->is_linked(), "must be linked");
286 VM_ENTRY_MARK;
287 return get_Method()->vtable_index();
288 }
289
290
291 // ------------------------------------------------------------------
292 // ciMethod::native_entry
293 //
294 // Get the address of this method's native code, if any.
295 address ciMethod::native_entry() {
296 check_is_loaded();
297 assert(flags().is_native(), "must be native method");
298 VM_ENTRY_MARK;
299 Method* method = get_Method();
300 address entry = method->native_function();
301 assert(entry != NULL, "must be valid entry point");
302 return entry;
303 }
304
305
306 // ------------------------------------------------------------------
307 // ciMethod::interpreter_entry
308 //
309 // Get the entry point for running this method in the interpreter.
310 address ciMethod::interpreter_entry() {
311 check_is_loaded();
312 VM_ENTRY_MARK;
313 methodHandle mh(THREAD, get_Method());
314 return Interpreter::entry_for_method(mh);
315 }
316
317
318 // ------------------------------------------------------------------
319 // ciMethod::uses_balanced_monitors
320 //
321 // Does this method use monitors in a strict stack-disciplined manner?
322 bool ciMethod::has_balanced_monitors() {
323 check_is_loaded();
324 if (_balanced_monitors) return true;
325
326 // Analyze the method to see if monitors are used properly.
327 VM_ENTRY_MARK;
328 methodHandle method(THREAD, get_Method());
329 assert(method->has_monitor_bytecodes(), "should have checked this");
330
331 // Check to see if a previous compilation computed the
332 // monitor-matching analysis.
333 if (method->guaranteed_monitor_matching()) {
334 _balanced_monitors = true;
335 return true;
336 }
337
338 {
339 EXCEPTION_MARK;
340 ResourceMark rm(THREAD);
341 GeneratePairingInfo gpi(method);
342 gpi.compute_map(CATCH);
343 if (!gpi.monitor_safe()) {
344 return false;
345 }
346 method->set_guaranteed_monitor_matching();
347 _balanced_monitors = true;
348 }
349 return true;
350 }
351
352
353 // ------------------------------------------------------------------
354 // ciMethod::get_flow_analysis
355 ciTypeFlow* ciMethod::get_flow_analysis() {
356 #if defined(COMPILER2)
357 if (_flow == NULL) {
358 ciEnv* env = CURRENT_ENV;
359 _flow = new (env->arena()) ciTypeFlow(env, this);
360 _flow->do_flow();
361 }
362 return _flow;
363 #else // COMPILER2
364 ShouldNotReachHere();
365 return NULL;
366 #endif // COMPILER2
367 }
368
369
370 // ------------------------------------------------------------------
371 // ciMethod::get_osr_flow_analysis
372 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
373 #if defined(COMPILER2)
374 // OSR entry points are always place after a call bytecode of some sort
375 assert(osr_bci >= 0, "must supply valid OSR entry point");
376 ciEnv* env = CURRENT_ENV;
377 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
378 flow->do_flow();
379 return flow;
380 #else // COMPILER2
381 ShouldNotReachHere();
382 return NULL;
383 #endif // COMPILER2
384 }
385
386 // ------------------------------------------------------------------
387 // ciMethod::raw_liveness_at_bci
388 //
389 // Which local variables are live at a specific bci?
390 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
391 check_is_loaded();
392 if (_liveness == NULL) {
393 // Create the liveness analyzer.
394 Arena* arena = CURRENT_ENV->arena();
395 _liveness = new (arena) MethodLiveness(arena, this);
396 _liveness->compute_liveness();
397 }
398 return _liveness->get_liveness_at(bci);
399 }
400
401 // ------------------------------------------------------------------
402 // ciMethod::liveness_at_bci
403 //
404 // Which local variables are live at a specific bci? When debugging
405 // will return true for all locals in some cases to improve debug
406 // information.
407 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
408 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
409 // Keep all locals live for the user's edification and amusement.
410 MethodLivenessResult result(_max_locals);
411 result.set_range(0, _max_locals);
412 result.set_is_valid();
413 return result;
414 }
415 return raw_liveness_at_bci(bci);
416 }
417
418 // ciMethod::live_local_oops_at_bci
419 //
420 // find all the live oops in the locals array for a particular bci
421 // Compute what the interpreter believes by using the interpreter
422 // oopmap generator. This is used as a double check during osr to
423 // guard against conservative result from MethodLiveness making us
424 // think a dead oop is live. MethodLiveness is conservative in the
425 // sense that it may consider locals to be live which cannot be live,
426 // like in the case where a local could contain an oop or a primitive
427 // along different paths. In that case the local must be dead when
428 // those paths merge. Since the interpreter's viewpoint is used when
429 // gc'ing an interpreter frame we need to use its viewpoint during
430 // OSR when loading the locals.
431
432 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
433 VM_ENTRY_MARK;
434 InterpreterOopMap mask;
435 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
436 int mask_size = max_locals();
437 ResourceBitMap result(mask_size);
438 int i;
439 for (i = 0; i < mask_size ; i++ ) {
440 if (mask.is_oop(i)) result.set_bit(i);
441 }
442 return result;
443 }
444
445
446 #ifdef COMPILER1
447 // ------------------------------------------------------------------
448 // ciMethod::bci_block_start
449 //
450 // Marks all bcis where a new basic block starts
451 const BitMap& ciMethod::bci_block_start() {
452 check_is_loaded();
453 if (_liveness == NULL) {
454 // Create the liveness analyzer.
455 Arena* arena = CURRENT_ENV->arena();
456 _liveness = new (arena) MethodLiveness(arena, this);
457 _liveness->compute_liveness();
458 }
459
460 return _liveness->get_bci_block_start();
461 }
462 #endif // COMPILER1
463
464
465 // ------------------------------------------------------------------
466 // ciMethod::call_profile_at_bci
467 //
468 // Get the ciCallProfile for the invocation of this method.
469 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
470 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
471 ResourceMark rm;
472 ciCallProfile result;
473 if (method_data() != NULL && method_data()->is_mature()) {
474 ciProfileData* data = method_data()->bci_to_data(bci);
475 if (data != NULL && data->is_CounterData()) {
476 // Every profiled call site has a counter.
477 int count = data->as_CounterData()->count();
478
479 if (!data->is_ReceiverTypeData()) {
480 result._receiver_count[0] = 0; // that's a definite zero
481 } else { // ReceiverTypeData is a subclass of CounterData
482 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
483 // In addition, virtual call sites have receiver type information
484 int receivers_count_total = 0;
485 int morphism = 0;
486 // Precompute morphism for the possible fixup
487 for (uint i = 0; i < call->row_limit(); i++) {
488 ciKlass* receiver = call->receiver(i);
489 if (receiver == NULL) continue;
490 morphism++;
491 }
492 int epsilon = 0;
493 if (TieredCompilation) {
494 // For a call, it is assumed that either the type of the receiver(s)
495 // is recorded or an associated counter is incremented, but not both. With
496 // tiered compilation, however, both can happen due to the interpreter and
497 // C1 profiling invocations differently. Address that inconsistency here.
498 if (morphism == 1 && count > 0) {
499 epsilon = count;
500 count = 0;
501 }
502 }
503 for (uint i = 0; i < call->row_limit(); i++) {
504 ciKlass* receiver = call->receiver(i);
505 if (receiver == NULL) continue;
506 int rcount = call->receiver_count(i) + epsilon;
507 if (rcount == 0) rcount = 1; // Should be valid value
508 receivers_count_total += rcount;
509 // Add the receiver to result data.
510 result.add_receiver(receiver, rcount);
511 // If we extend profiling to record methods,
512 // we will set result._method also.
513 }
514 // Determine call site's morphism.
515 // The call site count is 0 with known morphism (only 1 or 2 receivers)
516 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
517 // The call site count is > 0 in the case of a polymorphic virtual call.
518 if (morphism > 0 && morphism == result._limit) {
519 // The morphism <= MorphismLimit.
520 if ((morphism < ciCallProfile::MorphismLimit) ||
521 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
522 #ifdef ASSERT
523 if (count > 0) {
524 this->print_short_name(tty);
525 tty->print_cr(" @ bci:%d", bci);
526 this->print_codes();
527 assert(false, "this call site should not be polymorphic");
528 }
529 #endif
530 result._morphism = morphism;
531 }
532 }
533 // Make the count consistent if this is a call profile. If count is
534 // zero or less, presume that this is a typecheck profile and
535 // do nothing. Otherwise, increase count to be the sum of all
536 // receiver's counts.
537 if (count >= 0) {
538 count += receivers_count_total;
539 }
540 }
541 result._count = count;
542 }
543 }
544 return result;
545 }
546
547 // ------------------------------------------------------------------
548 // Add new receiver and sort data by receiver's profile count.
549 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
550 // Add new receiver and sort data by receiver's counts when we have space
551 // for it otherwise replace the less called receiver (less called receiver
552 // is placed to the last array element which is not used).
553 // First array's element contains most called receiver.
554 int i = _limit;
555 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
556 _receiver[i] = _receiver[i-1];
557 _receiver_count[i] = _receiver_count[i-1];
558 }
559 _receiver[i] = receiver;
560 _receiver_count[i] = receiver_count;
561 if (_limit < MorphismLimit) _limit++;
562 }
563
564
565 void ciMethod::assert_virtual_call_type_ok(int bci) {
566 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
567 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
568 }
569
570 void ciMethod::assert_call_type_ok(int bci) {
571 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
572 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
573 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
574 }
575
576 /**
577 * Check whether profiling provides a type for the argument i to the
578 * call at bci bci
579 *
580 * @param [in]bci bci of the call
581 * @param [in]i argument number
582 * @param [out]type profiled type of argument, NULL if none
583 * @param [out]ptr_kind whether always null, never null or maybe null
584 * @return true if profiling exists
585 *
586 */
587 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
588 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
589 ciProfileData* data = method_data()->bci_to_data(bci);
590 if (data != NULL) {
591 if (data->is_VirtualCallTypeData()) {
592 assert_virtual_call_type_ok(bci);
593 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
594 if (i >= call->number_of_arguments()) {
595 return false;
596 }
597 type = call->valid_argument_type(i);
598 ptr_kind = call->argument_ptr_kind(i);
599 return true;
600 } else if (data->is_CallTypeData()) {
601 assert_call_type_ok(bci);
602 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
603 if (i >= call->number_of_arguments()) {
604 return false;
605 }
606 type = call->valid_argument_type(i);
607 ptr_kind = call->argument_ptr_kind(i);
608 return true;
609 }
610 }
611 }
612 return false;
613 }
614
615 /**
616 * Check whether profiling provides a type for the return value from
617 * the call at bci bci
618 *
619 * @param [in]bci bci of the call
620 * @param [out]type profiled type of argument, NULL if none
621 * @param [out]ptr_kind whether always null, never null or maybe null
622 * @return true if profiling exists
623 *
624 */
625 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
626 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
627 ciProfileData* data = method_data()->bci_to_data(bci);
628 if (data != NULL) {
629 if (data->is_VirtualCallTypeData()) {
630 assert_virtual_call_type_ok(bci);
631 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
632 if (call->has_return()) {
633 type = call->valid_return_type();
634 ptr_kind = call->return_ptr_kind();
635 return true;
636 }
637 } else if (data->is_CallTypeData()) {
638 assert_call_type_ok(bci);
639 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
640 if (call->has_return()) {
641 type = call->valid_return_type();
642 ptr_kind = call->return_ptr_kind();
643 }
644 return true;
645 }
646 }
647 }
648 return false;
649 }
650
651 /**
652 * Check whether profiling provides a type for the parameter i
653 *
654 * @param [in]i parameter number
655 * @param [out]type profiled type of parameter, NULL if none
656 * @param [out]ptr_kind whether always null, never null or maybe null
657 * @return true if profiling exists
658 *
659 */
660 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
661 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
662 ciParametersTypeData* parameters = method_data()->parameters_type_data();
663 if (parameters != NULL && i < parameters->number_of_parameters()) {
664 type = parameters->valid_parameter_type(i);
665 ptr_kind = parameters->parameter_ptr_kind(i);
666 return true;
667 }
668 }
669 return false;
670 }
671
672
673 // ------------------------------------------------------------------
674 // ciMethod::find_monomorphic_target
675 //
676 // Given a certain calling environment, find the monomorphic target
677 // for the call. Return NULL if the call is not monomorphic in
678 // its calling environment, or if there are only abstract methods.
679 // The returned method is never abstract.
680 // Note: If caller uses a non-null result, it must inform dependencies
681 // via assert_unique_concrete_method or assert_leaf_type.
682 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
683 ciInstanceKlass* callee_holder,
684 ciInstanceKlass* actual_recv,
685 bool check_access) {
686 check_is_loaded();
687
688 if (actual_recv->is_interface()) {
689 // %%% We cannot trust interface types, yet. See bug 6312651.
690 return NULL;
691 }
692
693 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
694 if (root_m == NULL) {
695 // Something went wrong looking up the actual receiver method.
696 return NULL;
697 }
698 assert(!root_m->is_abstract(), "resolve_invoke promise");
699
700 // Make certain quick checks even if UseCHA is false.
701
702 // Is it private or final?
703 if (root_m->can_be_statically_bound()) {
704 return root_m;
705 }
706
707 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
708 // Easy case. There is no other place to put a method, so don't bother
709 // to go through the VM_ENTRY_MARK and all the rest.
710 return root_m;
711 }
712
713 // Array methods (clone, hashCode, etc.) are always statically bound.
714 // If we were to see an array type here, we'd return root_m.
715 // However, this method processes only ciInstanceKlasses. (See 4962591.)
716 // The inline_native_clone intrinsic narrows Object to T[] properly,
717 // so there is no need to do the same job here.
718
719 if (!UseCHA) return NULL;
720
721 VM_ENTRY_MARK;
722
723 // Disable CHA for default methods for now
724 if (root_m->is_default_method()) {
725 return NULL;
726 }
727
728 methodHandle target;
729 {
730 MutexLocker locker(Compile_lock);
731 Klass* context = actual_recv->get_Klass();
732 target = Dependencies::find_unique_concrete_method(context,
733 root_m->get_Method());
734 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
735 }
736
737 #ifndef PRODUCT
738 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
739 tty->print("found a non-root unique target method");
740 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
741 tty->print(" method = ");
742 target->print_short_name(tty);
743 tty->cr();
744 }
745 #endif //PRODUCT
746
747 if (target() == NULL) {
748 return NULL;
749 }
750 if (target() == root_m->get_Method()) {
751 return root_m;
752 }
753 if (!root_m->is_public() &&
754 !root_m->is_protected()) {
755 // If we are going to reason about inheritance, it's easiest
756 // if the method in question is public, protected, or private.
757 // If the answer is not root_m, it is conservatively correct
758 // to return NULL, even if the CHA encountered irrelevant
759 // methods in other packages.
760 // %%% TO DO: Work out logic for package-private methods
761 // with the same name but different vtable indexes.
762 return NULL;
763 }
764 assert(!target()->is_abstract(), "not allowed");
765 return CURRENT_THREAD_ENV->get_method(target());
766 }
767
768 // ------------------------------------------------------------------
769 // ciMethod::resolve_invoke
770 //
771 // Given a known receiver klass, find the target for the call.
772 // Return NULL if the call has no target or the target is abstract.
773 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
774 check_is_loaded();
775 VM_ENTRY_MARK;
776
777 Klass* caller_klass = caller->get_Klass();
778 Klass* recv = exact_receiver->get_Klass();
779 Klass* resolved = holder()->get_Klass();
780 Symbol* h_name = name()->get_symbol();
781 Symbol* h_signature = signature()->get_symbol();
782
783 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
784 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
785 methodHandle m;
786 // Only do exact lookup if receiver klass has been linked. Otherwise,
787 // the vtable has not been setup, and the LinkResolver will fail.
788 if (recv->is_array_klass()
789 ||
790 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
791 if (holder()->is_interface()) {
792 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
793 } else {
794 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
795 }
796 }
797
798 if (m.is_null()) {
799 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
800 return NULL;
801 }
802
803 ciMethod* result = this;
804 if (m() != get_Method()) {
805 result = CURRENT_THREAD_ENV->get_method(m());
806 }
807
808 // Don't return abstract methods because they aren't
809 // optimizable or interesting.
810 if (result->is_abstract()) {
811 return NULL;
812 } else {
813 return result;
814 }
815 }
816
817 // ------------------------------------------------------------------
818 // ciMethod::resolve_vtable_index
819 //
820 // Given a known receiver klass, find the vtable index for the call.
821 // Return Method::invalid_vtable_index if the vtable_index is unknown.
822 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
823 check_is_loaded();
824
825 int vtable_index = Method::invalid_vtable_index;
826 // Only do lookup if receiver klass has been linked. Otherwise,
827 // the vtable has not been setup, and the LinkResolver will fail.
828 if (!receiver->is_interface()
829 && (!receiver->is_instance_klass() ||
830 receiver->as_instance_klass()->is_linked())) {
831 VM_ENTRY_MARK;
832
833 Klass* caller_klass = caller->get_Klass();
834 Klass* recv = receiver->get_Klass();
835 Symbol* h_name = name()->get_symbol();
836 Symbol* h_signature = signature()->get_symbol();
837
838 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
839 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
840 if (vtable_index == Method::nonvirtual_vtable_index) {
841 // A statically bound method. Return "no such index".
842 vtable_index = Method::invalid_vtable_index;
843 }
844 }
845
846 return vtable_index;
847 }
848
849 // ------------------------------------------------------------------
850 // ciMethod::interpreter_call_site_count
851 int ciMethod::interpreter_call_site_count(int bci) {
852 if (method_data() != NULL) {
853 ResourceMark rm;
854 ciProfileData* data = method_data()->bci_to_data(bci);
855 if (data != NULL && data->is_CounterData()) {
856 return scale_count(data->as_CounterData()->count());
857 }
858 }
859 return -1; // unknown
860 }
861
862 // ------------------------------------------------------------------
863 // ciMethod::get_field_at_bci
864 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
865 ciBytecodeStream iter(this);
866 iter.reset_to_bci(bci);
867 iter.next();
868 return iter.get_field(will_link);
869 }
870
871 // ------------------------------------------------------------------
872 // ciMethod::get_method_at_bci
873 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
874 ciBytecodeStream iter(this);
875 iter.reset_to_bci(bci);
876 iter.next();
877 return iter.get_method(will_link, declared_signature);
878 }
879
880 // ------------------------------------------------------------------
881 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
882 ciBytecodeStream iter(this);
883 iter.reset_to_bci(bci);
884 iter.next();
885 return iter.get_declared_method_holder();
886 }
887
888 // ------------------------------------------------------------------
889 // Adjust a CounterData count to be commensurate with
890 // interpreter_invocation_count. If the MDO exists for
891 // only 25% of the time the method exists, then the
892 // counts in the MDO should be scaled by 4X, so that
893 // they can be usefully and stably compared against the
894 // invocation counts in methods.
895 int ciMethod::scale_count(int count, float prof_factor) {
896 if (count > 0 && method_data() != NULL) {
897 int counter_life;
898 int method_life = interpreter_invocation_count();
899 if (TieredCompilation) {
900 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
901 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
902 } else {
903 int current_mileage = method_data()->current_mileage();
904 int creation_mileage = method_data()->creation_mileage();
905 counter_life = current_mileage - creation_mileage;
906 }
907
908 // counter_life due to backedge_counter could be > method_life
909 if (counter_life > method_life)
910 counter_life = method_life;
911 if (0 < counter_life && counter_life <= method_life) {
912 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
913 count = (count > 0) ? count : 1;
914 }
915 }
916 return count;
917 }
918
919
920 // ------------------------------------------------------------------
921 // ciMethod::is_special_get_caller_class_method
922 //
923 bool ciMethod::is_ignored_by_security_stack_walk() const {
924 check_is_loaded();
925 VM_ENTRY_MARK;
926 return get_Method()->is_ignored_by_security_stack_walk();
927 }
928
929
930 // ------------------------------------------------------------------
931 // invokedynamic support
932
933 // ------------------------------------------------------------------
934 // ciMethod::is_method_handle_intrinsic
935 //
936 // Return true if the method is an instance of the JVM-generated
937 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
938 bool ciMethod::is_method_handle_intrinsic() const {
939 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
940 return (MethodHandles::is_signature_polymorphic(iid) &&
941 MethodHandles::is_signature_polymorphic_intrinsic(iid));
942 }
943
944 // ------------------------------------------------------------------
945 // ciMethod::is_compiled_lambda_form
946 //
947 // Return true if the method is a generated MethodHandle adapter.
948 // These are built by Java code.
949 bool ciMethod::is_compiled_lambda_form() const {
950 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
951 return iid == vmIntrinsics::_compiledLambdaForm;
952 }
953
954 // ------------------------------------------------------------------
955 // ciMethod::is_object_constructor
956 //
957 bool ciMethod::is_object_constructor() const {
958 return (name() == ciSymbol::object_initializer_name()
959 && signature()->return_type()->is_void());
960 // Note: We can't test is_static, because that would
961 // require the method to be loaded. Sometimes it isn't.
962 }
963
964 // ------------------------------------------------------------------
965 // ciMethod::is_static_init_factory
966 //
967 bool ciMethod::is_static_init_factory() const {
968 return (name() == ciSymbol::object_initializer_name()
969 && !signature()->return_type()->is_void());
970 }
971
972 // ------------------------------------------------------------------
973 // ciMethod::has_member_arg
974 //
975 // Return true if the method is a linker intrinsic like _linkToVirtual.
976 // These are built by the JVM.
977 bool ciMethod::has_member_arg() const {
978 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
979 return (MethodHandles::is_signature_polymorphic(iid) &&
980 MethodHandles::has_member_arg(iid));
981 }
982
983 // ------------------------------------------------------------------
984 // ciMethod::ensure_method_data
985 //
986 // Generate new MethodData* objects at compile time.
987 // Return true if allocation was successful or no MDO is required.
988 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
989 EXCEPTION_CONTEXT;
990 if (is_native() || is_abstract() || h_m()->is_accessor()) {
991 return true;
992 }
993 if (h_m()->method_data() == NULL) {
994 Method::build_interpreter_method_data(h_m, THREAD);
995 if (HAS_PENDING_EXCEPTION) {
996 CLEAR_PENDING_EXCEPTION;
997 }
998 }
999 if (h_m()->method_data() != NULL) {
1000 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1001 _method_data->load_data();
1002 return true;
1003 } else {
1004 _method_data = CURRENT_ENV->get_empty_methodData();
1005 return false;
1006 }
1007 }
1008
1009 // public, retroactive version
1010 bool ciMethod::ensure_method_data() {
1011 bool result = true;
1012 if (_method_data == NULL || _method_data->is_empty()) {
1013 GUARDED_VM_ENTRY({
1014 result = ensure_method_data(get_Method());
1015 });
1016 }
1017 return result;
1018 }
1019
1020
1021 // ------------------------------------------------------------------
1022 // ciMethod::method_data
1023 //
1024 ciMethodData* ciMethod::method_data() {
1025 if (_method_data != NULL) {
1026 return _method_data;
1027 }
1028 VM_ENTRY_MARK;
1029 ciEnv* env = CURRENT_ENV;
1030 Thread* my_thread = JavaThread::current();
1031 methodHandle h_m(my_thread, get_Method());
1032
1033 if (h_m()->method_data() != NULL) {
1034 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1035 _method_data->load_data();
1036 } else {
1037 _method_data = CURRENT_ENV->get_empty_methodData();
1038 }
1039 return _method_data;
1040
1041 }
1042
1043 // ------------------------------------------------------------------
1044 // ciMethod::method_data_or_null
1045 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1046 // NULL otherwise.
1047 ciMethodData* ciMethod::method_data_or_null() {
1048 ciMethodData *md = method_data();
1049 if (md->is_empty()) {
1050 return NULL;
1051 }
1052 return md;
1053 }
1054
1055 // ------------------------------------------------------------------
1056 // ciMethod::ensure_method_counters
1057 //
1058 MethodCounters* ciMethod::ensure_method_counters() {
1059 check_is_loaded();
1060 VM_ENTRY_MARK;
1061 methodHandle mh(THREAD, get_Method());
1062 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1063 return method_counters;
1064 }
1065
1066 // ------------------------------------------------------------------
1067 // ciMethod::has_option
1068 //
1069 bool ciMethod::has_option(const char* option) {
1070 check_is_loaded();
1071 VM_ENTRY_MARK;
1072 methodHandle mh(THREAD, get_Method());
1073 return CompilerOracle::has_option_string(mh, option);
1074 }
1075
1076 // ------------------------------------------------------------------
1077 // ciMethod::has_option_value
1078 //
1079 bool ciMethod::has_option_value(const char* option, double& value) {
1080 check_is_loaded();
1081 VM_ENTRY_MARK;
1082 methodHandle mh(THREAD, get_Method());
1083 return CompilerOracle::has_option_value(mh, option, value);
1084 }
1085 // ------------------------------------------------------------------
1086 // ciMethod::can_be_compiled
1087 //
1088 // Have previous compilations of this method succeeded?
1089 bool ciMethod::can_be_compiled() {
1090 check_is_loaded();
1091 ciEnv* env = CURRENT_ENV;
1092 if (is_c1_compile(env->comp_level())) {
1093 return _is_c1_compilable;
1094 }
1095 return _is_c2_compilable;
1096 }
1097
1098 // ------------------------------------------------------------------
1099 // ciMethod::set_not_compilable
1100 //
1101 // Tell the VM that this method cannot be compiled at all.
1102 void ciMethod::set_not_compilable(const char* reason) {
1103 check_is_loaded();
1104 VM_ENTRY_MARK;
1105 ciEnv* env = CURRENT_ENV;
1106 if (is_c1_compile(env->comp_level())) {
1107 _is_c1_compilable = false;
1108 } else {
1109 _is_c2_compilable = false;
1110 }
1111 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1112 }
1113
1114 // ------------------------------------------------------------------
1115 // ciMethod::can_be_osr_compiled
1116 //
1117 // Have previous compilations of this method succeeded?
1118 //
1119 // Implementation note: the VM does not currently keep track
1120 // of failed OSR compilations per bci. The entry_bci parameter
1121 // is currently unused.
1122 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1123 check_is_loaded();
1124 VM_ENTRY_MARK;
1125 ciEnv* env = CURRENT_ENV;
1126 return !get_Method()->is_not_osr_compilable(env->comp_level());
1127 }
1128
1129 // ------------------------------------------------------------------
1130 // ciMethod::has_compiled_code
1131 bool ciMethod::has_compiled_code() {
1132 return instructions_size() > 0;
1133 }
1134
1135 int ciMethod::comp_level() {
1136 check_is_loaded();
1137 VM_ENTRY_MARK;
1138 CompiledMethod* nm = get_Method()->code();
1139 if (nm != NULL) return nm->comp_level();
1140 return 0;
1141 }
1142
1143 int ciMethod::highest_osr_comp_level() {
1144 check_is_loaded();
1145 VM_ENTRY_MARK;
1146 return get_Method()->highest_osr_comp_level();
1147 }
1148
1149 // ------------------------------------------------------------------
1150 // ciMethod::code_size_for_inlining
1151 //
1152 // Code size for inlining decisions. This method returns a code
1153 // size of 1 for methods which has the ForceInline annotation.
1154 int ciMethod::code_size_for_inlining() {
1155 check_is_loaded();
1156 if (get_Method()->force_inline()) {
1157 return 1;
1158 }
1159 return code_size();
1160 }
1161
1162 // ------------------------------------------------------------------
1163 // ciMethod::instructions_size
1164 //
1165 // This is a rough metric for "fat" methods, compared before inlining
1166 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1167 // junk like exception handler, stubs, and constant table, which are
1168 // not highly relevant to an inlined method. So we use the more
1169 // specific accessor nmethod::insts_size.
1170 int ciMethod::instructions_size() {
1171 if (_instructions_size == -1) {
1172 GUARDED_VM_ENTRY(
1173 CompiledMethod* code = get_Method()->code();
1174 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1175 _instructions_size = code->insts_end() - code->verified_entry_point();
1176 } else {
1177 _instructions_size = 0;
1178 }
1179 );
1180 }
1181 return _instructions_size;
1182 }
1183
1184 // ------------------------------------------------------------------
1185 // ciMethod::log_nmethod_identity
1186 void ciMethod::log_nmethod_identity(xmlStream* log) {
1187 GUARDED_VM_ENTRY(
1188 CompiledMethod* code = get_Method()->code();
1189 if (code != NULL) {
1190 code->log_identity(log);
1191 }
1192 )
1193 }
1194
1195 // ------------------------------------------------------------------
1196 // ciMethod::is_not_reached
1197 bool ciMethod::is_not_reached(int bci) {
1198 check_is_loaded();
1199 VM_ENTRY_MARK;
1200 return Interpreter::is_not_reached(
1201 methodHandle(THREAD, get_Method()), bci);
1202 }
1203
1204 // ------------------------------------------------------------------
1205 // ciMethod::was_never_executed
1206 bool ciMethod::was_executed_more_than(int times) {
1207 VM_ENTRY_MARK;
1208 return get_Method()->was_executed_more_than(times);
1209 }
1210
1211 // ------------------------------------------------------------------
1212 // ciMethod::has_unloaded_classes_in_signature
1213 bool ciMethod::has_unloaded_classes_in_signature() {
1214 VM_ENTRY_MARK;
1215 {
1216 EXCEPTION_MARK;
1217 methodHandle m(THREAD, get_Method());
1218 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1219 if( HAS_PENDING_EXCEPTION ) {
1220 CLEAR_PENDING_EXCEPTION;
1221 return true; // Declare that we may have unloaded classes
1222 }
1223 return has_unloaded;
1224 }
1225 }
1226
1227 // ------------------------------------------------------------------
1228 // ciMethod::is_klass_loaded
1229 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1230 VM_ENTRY_MARK;
1231 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1232 }
1233
1234 // ------------------------------------------------------------------
1235 // ciMethod::check_call
1236 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1237 // This method is used only in C2 from InlineTree::ok_to_inline,
1238 // and is only used under -Xcomp.
1239 // It appears to fail when applied to an invokeinterface call site.
1240 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1241 VM_ENTRY_MARK;
1242 {
1243 EXCEPTION_MARK;
1244 HandleMark hm(THREAD);
1245 constantPoolHandle pool (THREAD, get_Method()->constants());
1246 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1247 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1248 if (HAS_PENDING_EXCEPTION) {
1249 CLEAR_PENDING_EXCEPTION;
1250 return false;
1251 } else {
1252 return (spec_method->is_static() == is_static);
1253 }
1254 }
1255 return false;
1256 }
1257
1258 // ------------------------------------------------------------------
1259 // ciMethod::profile_aging
1260 //
1261 // Should the method be compiled with an age counter?
1262 bool ciMethod::profile_aging() const {
1263 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1264 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1265 }
1266 // ------------------------------------------------------------------
1267 // ciMethod::print_codes
1268 //
1269 // Print the bytecodes for this method.
1270 void ciMethod::print_codes_on(outputStream* st) {
1271 check_is_loaded();
1272 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1273 }
1274
1275
1276 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1277 check_is_loaded(); \
1278 VM_ENTRY_MARK; \
1279 return get_Method()->flag_accessor(); \
1280 }
1281
1282 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1283 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1284 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1285 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1286 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1287 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1288 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1289 bool ciMethod::is_object_constructor_or_class_initializer() const { FETCH_FLAG_FROM_VM(is_object_constructor_or_class_initializer); }
1290
1291 bool ciMethod::is_boxing_method() const {
1292 if (holder()->is_box_klass()) {
1293 switch (intrinsic_id()) {
1294 case vmIntrinsics::_Boolean_valueOf:
1295 case vmIntrinsics::_Byte_valueOf:
1296 case vmIntrinsics::_Character_valueOf:
1297 case vmIntrinsics::_Short_valueOf:
1298 case vmIntrinsics::_Integer_valueOf:
1299 case vmIntrinsics::_Long_valueOf:
1300 case vmIntrinsics::_Float_valueOf:
1301 case vmIntrinsics::_Double_valueOf:
1302 return true;
1303 default:
1304 return false;
1305 }
1306 }
1307 return false;
1308 }
1309
1310 bool ciMethod::is_unboxing_method() const {
1311 if (holder()->is_box_klass()) {
1312 switch (intrinsic_id()) {
1313 case vmIntrinsics::_booleanValue:
1314 case vmIntrinsics::_byteValue:
1315 case vmIntrinsics::_charValue:
1316 case vmIntrinsics::_shortValue:
1317 case vmIntrinsics::_intValue:
1318 case vmIntrinsics::_longValue:
1319 case vmIntrinsics::_floatValue:
1320 case vmIntrinsics::_doubleValue:
1321 return true;
1322 default:
1323 return false;
1324 }
1325 }
1326 return false;
1327 }
1328
1329 BCEscapeAnalyzer *ciMethod::get_bcea() {
1330 #ifdef COMPILER2
1331 if (_bcea == NULL) {
1332 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1333 }
1334 return _bcea;
1335 #else // COMPILER2
1336 ShouldNotReachHere();
1337 return NULL;
1338 #endif // COMPILER2
1339 }
1340
1341 ciMethodBlocks *ciMethod::get_method_blocks() {
1342 Arena *arena = CURRENT_ENV->arena();
1343 if (_method_blocks == NULL) {
1344 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1345 }
1346 return _method_blocks;
1347 }
1348
1349 #undef FETCH_FLAG_FROM_VM
1350
1351 void ciMethod::dump_name_as_ascii(outputStream* st) {
1352 Method* method = get_Method();
1353 st->print("%s %s %s",
1354 method->klass_name()->as_quoted_ascii(),
1355 method->name()->as_quoted_ascii(),
1356 method->signature()->as_quoted_ascii());
1357 }
1358
1359 void ciMethod::dump_replay_data(outputStream* st) {
1360 ResourceMark rm;
1361 Method* method = get_Method();
1362 MethodCounters* mcs = method->method_counters();
1363 st->print("ciMethod ");
1364 dump_name_as_ascii(st);
1365 st->print_cr(" %d %d %d %d %d",
1366 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1367 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1368 interpreter_invocation_count(),
1369 interpreter_throwout_count(),
1370 _instructions_size);
1371 }
1372
1373 // ------------------------------------------------------------------
1374 // ciMethod::print_codes
1375 //
1376 // Print a range of the bytecodes for this method.
1377 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1378 check_is_loaded();
1379 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1380 }
1381
1382 // ------------------------------------------------------------------
1383 // ciMethod::print_name
1384 //
1385 // Print the name of this method, including signature and some flags.
1386 void ciMethod::print_name(outputStream* st) {
1387 check_is_loaded();
1388 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1389 }
1390
1391 // ------------------------------------------------------------------
1392 // ciMethod::print_short_name
1393 //
1394 // Print the name of this method, without signature.
1395 void ciMethod::print_short_name(outputStream* st) {
1396 if (is_loaded()) {
1397 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1398 } else {
1399 // Fall back if method is not loaded.
1400 holder()->print_name_on(st);
1401 st->print("::");
1402 name()->print_symbol_on(st);
1403 if (WizardMode)
1404 signature()->as_symbol()->print_symbol_on(st);
1405 }
1406 }
1407
1408 // ------------------------------------------------------------------
1409 // ciMethod::print_impl
1410 //
1411 // Implementation of the print method.
1412 void ciMethod::print_impl(outputStream* st) {
1413 ciMetadata::print_impl(st);
1414 st->print(" name=");
1415 name()->print_symbol_on(st);
1416 st->print(" holder=");
1417 holder()->print_name_on(st);
1418 st->print(" signature=");
1419 signature()->as_symbol()->print_symbol_on(st);
1420 if (is_loaded()) {
1421 st->print(" loaded=true");
1422 st->print(" arg_size=%d", arg_size());
1423 st->print(" flags=");
1424 flags().print_member_flags(st);
1425 } else {
1426 st->print(" loaded=false");
1427 }
1428 }
1429
1430 // ------------------------------------------------------------------
1431
1432 static BasicType erase_to_word_type(BasicType bt) {
1433 if (is_subword_type(bt)) return T_INT;
1434 if (bt == T_ARRAY) return T_OBJECT;
1435 if (bt == T_VALUETYPE) return T_OBJECT;
1436 return bt;
1437 }
1438
1439 static bool basic_types_match(ciType* t1, ciType* t2) {
1440 if (t1 == t2) return true;
1441 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1442 }
1443
1444 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1445 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1446 !resolved_method->is_method_handle_intrinsic();
1447
1448 if (!invoke_through_mh_intrinsic) {
1449 // Method name & descriptor should stay the same.
1450 // Signatures may reference unloaded types and thus they may be not strictly equal.
1451 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1452 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1453
1454 return (declared_method->name()->equals(resolved_method->name())) &&
1455 (declared_signature->equals(resolved_signature));
1456 }
1457
1458 ciMethod* linker = declared_method;
1459 ciMethod* target = resolved_method;
1460 // Linkers have appendix argument which is not passed to callee.
1461 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1462 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1463 return false; // argument slot count mismatch
1464 }
1465
1466 ciSignature* linker_sig = linker->signature();
1467 ciSignature* target_sig = target->signature();
1468
1469 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1470 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1471 return false; // argument count mismatch
1472 }
1473
1474 int sbase = 0, rbase = 0;
1475 switch (linker->intrinsic_id()) {
1476 case vmIntrinsics::_linkToVirtual:
1477 case vmIntrinsics::_linkToInterface:
1478 case vmIntrinsics::_linkToSpecial: {
1479 if (target->is_static()) {
1480 return false;
1481 }
1482 if (linker_sig->type_at(0)->is_primitive_type()) {
1483 return false; // receiver should be an oop
1484 }
1485 sbase = 1; // skip receiver
1486 break;
1487 }
1488 case vmIntrinsics::_linkToStatic: {
1489 if (!target->is_static()) {
1490 return false;
1491 }
1492 break;
1493 }
1494 case vmIntrinsics::_invokeBasic: {
1495 if (target->is_static()) {
1496 if (target_sig->type_at(0)->is_primitive_type()) {
1497 return false; // receiver should be an oop
1498 }
1499 rbase = 1; // skip receiver
1500 }
1501 break;
1502 }
1503 default:
1504 break;
1505 }
1506 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1507 int arg_count = target_sig->count() - rbase;
1508 for (int i = 0; i < arg_count; i++) {
1509 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1510 return false;
1511 }
1512 }
1513 // Only check the return type if the symbolic info has non-void return type.
1514 // I.e. the return value of the resolved method can be dropped.
1515 if (!linker->return_type()->is_void() &&
1516 !basic_types_match(linker->return_type(), target->return_type())) {
1517 return false;
1518 }
1519 return true; // no mismatch found
1520 }
1521
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() {
1530 VM_ENTRY_MARK;
1531 if (get_Method()->adapter() == NULL) {
1532 return NULL;
1533 }
1534 return get_Method()->adapter()->get_sig_cc();
1535 }
--- EOF ---