1 /*
2 * Copyright (c) 1999, 2017, 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.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/oop.inline.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "utilities/bitMap.inline.hpp"
49 #include "utilities/xmlstream.hpp"
50 #include "trace/tracing.hpp"
51 #ifdef COMPILER2
52 #include "ci/bcEscapeAnalyzer.hpp"
53 #include "ci/ciTypeFlow.hpp"
54 #include "oops/method.hpp"
55 #endif
56
57 // ciMethod
58 //
59 // This class represents a Method* in the HotSpot virtual
60 // machine.
61
62
63 // ------------------------------------------------------------------
64 // ciMethod::ciMethod
65 //
66 // Loaded method.
67 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
68 ciMetadata(h_m()),
69 _holder(holder)
70 {
71 assert(h_m() != NULL, "no null method");
72
73 if (LogTouchedMethods) {
74 h_m()->log_touched(Thread::current());
75 }
76 // These fields are always filled in in loaded methods.
77 _flags = ciFlags(h_m()->access_flags());
78
79 // Easy to compute, so fill them in now.
80 _max_stack = h_m()->max_stack();
81 _max_locals = h_m()->max_locals();
82 _code_size = h_m()->code_size();
83 _intrinsic_id = h_m()->intrinsic_id();
84 _handler_count = h_m()->exception_table_length();
85 _size_of_parameters = h_m()->size_of_parameters();
86 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
87 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
88 _is_c1_compilable = !h_m()->is_not_c1_compilable();
89 _is_c2_compilable = !h_m()->is_not_c2_compilable();
90 _can_be_parsed = true;
91 _has_reserved_stack_access = h_m()->has_reserved_stack_access();
92 // Lazy fields, filled in on demand. Require allocation.
93 _code = NULL;
94 _exception_handlers = NULL;
95 _liveness = NULL;
96 _method_blocks = NULL;
97 #if defined(COMPILER2)
98 _flow = NULL;
99 _bcea = NULL;
100 #endif // COMPILER2
101
102 ciEnv *env = CURRENT_ENV;
103 if (env->jvmti_can_hotswap_or_post_breakpoint()) {
104 // 6328518 check hotswap conditions under the right lock.
105 MutexLocker locker(Compile_lock);
106 if (Dependencies::check_evol_method(h_m()) != NULL) {
107 _is_c1_compilable = false;
108 _is_c2_compilable = false;
109 _can_be_parsed = false;
110 }
111 } else {
112 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
113 }
114
115 if (h_m()->method_holder()->is_linked()) {
116 _can_be_statically_bound = h_m()->can_be_statically_bound();
117 } else {
118 // Have to use a conservative value in this case.
119 _can_be_statically_bound = false;
120 }
121
122 // Adjust the definition of this condition to be more useful:
123 // %%% take these conditions into account in vtable generation
124 if (!_can_be_statically_bound && h_m()->is_private())
125 _can_be_statically_bound = true;
126 if (_can_be_statically_bound && h_m()->is_abstract())
127 _can_be_statically_bound = false;
128
129 // generating _signature may allow GC and therefore move m.
130 // These fields are always filled in.
131 _name = env->get_symbol(h_m()->name());
132 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
133 constantPoolHandle cpool = h_m()->constants();
134 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
135 _method_data = NULL;
136 _nmethod_age = h_m()->nmethod_age();
137 // Take a snapshot of these values, so they will be commensurate with the MDO.
138 if (ProfileInterpreter || TieredCompilation) {
139 int invcnt = h_m()->interpreter_invocation_count();
140 // if the value overflowed report it as max int
141 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
142 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
143 } else {
144 _interpreter_invocation_count = 0;
145 _interpreter_throwout_count = 0;
146 }
147 if (_interpreter_invocation_count == 0)
148 _interpreter_invocation_count = 1;
149 _instructions_size = -1;
150 #ifdef ASSERT
151 if (ReplayCompiles) {
152 ciReplay::initialize(this);
153 }
154 #endif
155 }
156
157
158 // ------------------------------------------------------------------
159 // ciMethod::ciMethod
160 //
161 // Unloaded method.
162 ciMethod::ciMethod(ciInstanceKlass* holder,
163 ciSymbol* name,
164 ciSymbol* signature,
165 ciInstanceKlass* accessor) :
166 ciMetadata((Metadata*)NULL),
167 _name( name),
168 _holder( holder),
169 _intrinsic_id( vmIntrinsics::_none),
170 _liveness( NULL),
171 _can_be_statically_bound(false),
172 _method_blocks( NULL),
173 _method_data( NULL)
174 #if defined(COMPILER2)
175 ,
176 _flow( NULL),
177 _bcea( NULL),
178 _instructions_size(-1)
179 #endif // COMPILER2
180 {
181 // Usually holder and accessor are the same type but in some cases
182 // the holder has the wrong class loader (e.g. invokedynamic call
183 // sites) so we pass the accessor.
184 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
185 }
186
187
188 // ------------------------------------------------------------------
189 // ciMethod::load_code
190 //
191 // Load the bytecodes and exception handler table for this method.
192 void ciMethod::load_code() {
193 VM_ENTRY_MARK;
194 assert(is_loaded(), "only loaded methods have code");
195
196 Method* me = get_Method();
197 Arena* arena = CURRENT_THREAD_ENV->arena();
198
199 // Load the bytecodes.
200 _code = (address)arena->Amalloc(code_size());
201 memcpy(_code, me->code_base(), code_size());
202
203 #if INCLUDE_JVMTI
204 // Revert any breakpoint bytecodes in ci's copy
205 if (me->number_of_breakpoints() > 0) {
206 BreakpointInfo* bp = me->method_holder()->breakpoints();
207 for (; bp != NULL; bp = bp->next()) {
208 if (bp->match(me)) {
209 code_at_put(bp->bci(), bp->orig_bytecode());
210 }
211 }
212 }
213 #endif
214
215 // And load the exception table.
216 ExceptionTable exc_table(me);
217
218 // Allocate one extra spot in our list of exceptions. This
219 // last entry will be used to represent the possibility that
220 // an exception escapes the method. See ciExceptionHandlerStream
221 // for details.
222 _exception_handlers =
223 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
224 * (_handler_count + 1));
225 if (_handler_count > 0) {
226 for (int i=0; i<_handler_count; i++) {
227 _exception_handlers[i] = new (arena) ciExceptionHandler(
228 holder(),
229 /* start */ exc_table.start_pc(i),
230 /* limit */ exc_table.end_pc(i),
231 /* goto pc */ exc_table.handler_pc(i),
232 /* cp index */ exc_table.catch_type_index(i));
233 }
234 }
235
236 // Put an entry at the end of our list to represent the possibility
237 // of exceptional exit.
238 _exception_handlers[_handler_count] =
239 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
240
241 if (CIPrintMethodCodes) {
242 print_codes();
243 }
244 }
245
246
247 // ------------------------------------------------------------------
248 // ciMethod::has_linenumber_table
249 //
250 // length unknown until decompression
251 bool ciMethod::has_linenumber_table() const {
252 check_is_loaded();
253 VM_ENTRY_MARK;
254 return get_Method()->has_linenumber_table();
255 }
256
257
258 // ------------------------------------------------------------------
259 // ciMethod::compressed_linenumber_table
260 u_char* ciMethod::compressed_linenumber_table() const {
261 check_is_loaded();
262 VM_ENTRY_MARK;
263 return get_Method()->compressed_linenumber_table();
264 }
265
266
267 // ------------------------------------------------------------------
268 // ciMethod::line_number_from_bci
269 int ciMethod::line_number_from_bci(int bci) const {
270 check_is_loaded();
271 VM_ENTRY_MARK;
272 return get_Method()->line_number_from_bci(bci);
273 }
274
275
276 // ------------------------------------------------------------------
277 // ciMethod::vtable_index
278 //
279 // Get the position of this method's entry in the vtable, if any.
280 int ciMethod::vtable_index() {
281 check_is_loaded();
282 assert(holder()->is_linked(), "must be linked");
283 VM_ENTRY_MARK;
284 return get_Method()->vtable_index();
285 }
286
287
288 // ------------------------------------------------------------------
289 // ciMethod::native_entry
290 //
291 // Get the address of this method's native code, if any.
292 address ciMethod::native_entry() {
293 check_is_loaded();
294 assert(flags().is_native(), "must be native method");
295 VM_ENTRY_MARK;
296 Method* method = get_Method();
297 address entry = method->native_function();
298 assert(entry != NULL, "must be valid entry point");
299 return entry;
300 }
301
302
303 // ------------------------------------------------------------------
304 // ciMethod::interpreter_entry
305 //
306 // Get the entry point for running this method in the interpreter.
307 address ciMethod::interpreter_entry() {
308 check_is_loaded();
309 VM_ENTRY_MARK;
310 methodHandle mh(THREAD, get_Method());
311 return Interpreter::entry_for_method(mh);
312 }
313
314
315 // ------------------------------------------------------------------
316 // ciMethod::uses_balanced_monitors
317 //
318 // Does this method use monitors in a strict stack-disciplined manner?
319 bool ciMethod::has_balanced_monitors() {
320 check_is_loaded();
321 if (_balanced_monitors) return true;
322
323 // Analyze the method to see if monitors are used properly.
324 VM_ENTRY_MARK;
325 methodHandle method(THREAD, get_Method());
326 assert(method->has_monitor_bytecodes(), "should have checked this");
327
328 // Check to see if a previous compilation computed the
329 // monitor-matching analysis.
330 if (method->guaranteed_monitor_matching()) {
331 _balanced_monitors = true;
332 return true;
333 }
334
335 {
336 EXCEPTION_MARK;
337 ResourceMark rm(THREAD);
338 GeneratePairingInfo gpi(method);
339 gpi.compute_map(CATCH);
340 if (!gpi.monitor_safe()) {
341 return false;
342 }
343 method->set_guaranteed_monitor_matching();
344 _balanced_monitors = true;
345 }
346 return true;
347 }
348
349
350 // ------------------------------------------------------------------
351 // ciMethod::get_flow_analysis
352 ciTypeFlow* ciMethod::get_flow_analysis() {
353 #if defined(COMPILER2)
354 if (_flow == NULL) {
355 ciEnv* env = CURRENT_ENV;
356 _flow = new (env->arena()) ciTypeFlow(env, this);
357 _flow->do_flow();
358 }
359 return _flow;
360 #else // COMPILER2
361 ShouldNotReachHere();
362 return NULL;
363 #endif // COMPILER2
364 }
365
366
367 // ------------------------------------------------------------------
368 // ciMethod::get_osr_flow_analysis
369 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
370 #if defined(COMPILER2)
371 // OSR entry points are always place after a call bytecode of some sort
372 assert(osr_bci >= 0, "must supply valid OSR entry point");
373 ciEnv* env = CURRENT_ENV;
374 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
375 flow->do_flow();
376 return flow;
377 #else // COMPILER2
378 ShouldNotReachHere();
379 return NULL;
380 #endif // COMPILER2
381 }
382
383 // ------------------------------------------------------------------
384 // ciMethod::raw_liveness_at_bci
385 //
386 // Which local variables are live at a specific bci?
387 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
388 check_is_loaded();
389 if (_liveness == NULL) {
390 // Create the liveness analyzer.
391 Arena* arena = CURRENT_ENV->arena();
392 _liveness = new (arena) MethodLiveness(arena, this);
393 _liveness->compute_liveness();
394 }
395 return _liveness->get_liveness_at(bci);
396 }
397
398 // ------------------------------------------------------------------
399 // ciMethod::liveness_at_bci
400 //
401 // Which local variables are live at a specific bci? When debugging
402 // will return true for all locals in some cases to improve debug
403 // information.
404 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
405 MethodLivenessResult result = raw_liveness_at_bci(bci);
406 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
407 // Keep all locals live for the user's edification and amusement.
408 result.at_put_range(0, result.size(), true);
409 }
410 return result;
411 }
412
413 // ciMethod::live_local_oops_at_bci
414 //
415 // find all the live oops in the locals array for a particular bci
416 // Compute what the interpreter believes by using the interpreter
417 // oopmap generator. This is used as a double check during osr to
418 // guard against conservative result from MethodLiveness making us
419 // think a dead oop is live. MethodLiveness is conservative in the
420 // sense that it may consider locals to be live which cannot be live,
421 // like in the case where a local could contain an oop or a primitive
422 // along different paths. In that case the local must be dead when
423 // those paths merge. Since the interpreter's viewpoint is used when
424 // gc'ing an interpreter frame we need to use its viewpoint during
425 // OSR when loading the locals.
426
427 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
428 VM_ENTRY_MARK;
429 InterpreterOopMap mask;
430 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
431 int mask_size = max_locals();
432 ResourceBitMap result(mask_size);
433 int i;
434 for (i = 0; i < mask_size ; i++ ) {
435 if (mask.is_oop(i)) result.set_bit(i);
436 }
437 return result;
438 }
439
440
441 #ifdef COMPILER1
442 // ------------------------------------------------------------------
443 // ciMethod::bci_block_start
444 //
445 // Marks all bcis where a new basic block starts
446 const BitMap& ciMethod::bci_block_start() {
447 check_is_loaded();
448 if (_liveness == NULL) {
449 // Create the liveness analyzer.
450 Arena* arena = CURRENT_ENV->arena();
451 _liveness = new (arena) MethodLiveness(arena, this);
452 _liveness->compute_liveness();
453 }
454
455 return _liveness->get_bci_block_start();
456 }
457 #endif // COMPILER1
458
459
460 // ------------------------------------------------------------------
461 // ciMethod::call_profile_at_bci
462 //
463 // Get the ciCallProfile for the invocation of this method.
464 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
465 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
466 ResourceMark rm;
467 ciCallProfile result;
468 if (method_data() != NULL && method_data()->is_mature()) {
469 ciProfileData* data = method_data()->bci_to_data(bci);
470 if (data != NULL && data->is_CounterData()) {
471 // Every profiled call site has a counter.
472 int count = data->as_CounterData()->count();
473
474 if (!data->is_ReceiverTypeData()) {
475 result._receiver_count[0] = 0; // that's a definite zero
476 } else { // ReceiverTypeData is a subclass of CounterData
477 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
478 // In addition, virtual call sites have receiver type information
479 int receivers_count_total = 0;
480 int morphism = 0;
481 // Precompute morphism for the possible fixup
482 for (uint i = 0; i < call->row_limit(); i++) {
483 ciKlass* receiver = call->receiver(i);
484 if (receiver == NULL) continue;
485 morphism++;
486 }
487 int epsilon = 0;
488 if (TieredCompilation) {
489 // For a call, it is assumed that either the type of the receiver(s)
490 // is recorded or an associated counter is incremented, but not both. With
491 // tiered compilation, however, both can happen due to the interpreter and
492 // C1 profiling invocations differently. Address that inconsistency here.
493 if (morphism == 1 && count > 0) {
494 epsilon = count;
495 count = 0;
496 }
497 }
498 for (uint i = 0; i < call->row_limit(); i++) {
499 ciKlass* receiver = call->receiver(i);
500 if (receiver == NULL) continue;
501 int rcount = call->receiver_count(i) + epsilon;
502 if (rcount == 0) rcount = 1; // Should be valid value
503 receivers_count_total += rcount;
504 // Add the receiver to result data.
505 result.add_receiver(receiver, rcount);
506 // If we extend profiling to record methods,
507 // we will set result._method also.
508 }
509 // Determine call site's morphism.
510 // The call site count is 0 with known morphism (only 1 or 2 receivers)
511 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
512 // The call site count is > 0 in the case of a polymorphic virtual call.
513 if (morphism > 0 && morphism == result._limit) {
514 // The morphism <= MorphismLimit.
515 if ((morphism < ciCallProfile::MorphismLimit) ||
516 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
517 #ifdef ASSERT
518 if (count > 0) {
519 this->print_short_name(tty);
520 tty->print_cr(" @ bci:%d", bci);
521 this->print_codes();
522 assert(false, "this call site should not be polymorphic");
523 }
524 #endif
525 result._morphism = morphism;
526 }
527 }
528 // Make the count consistent if this is a call profile. If count is
529 // zero or less, presume that this is a typecheck profile and
530 // do nothing. Otherwise, increase count to be the sum of all
531 // receiver's counts.
532 if (count >= 0) {
533 count += receivers_count_total;
534 }
535 }
536 result._count = count;
537 }
538 }
539 return result;
540 }
541
542 // ------------------------------------------------------------------
543 // Add new receiver and sort data by receiver's profile count.
544 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
545 // Add new receiver and sort data by receiver's counts when we have space
546 // for it otherwise replace the less called receiver (less called receiver
547 // is placed to the last array element which is not used).
548 // First array's element contains most called receiver.
549 int i = _limit;
550 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
551 _receiver[i] = _receiver[i-1];
552 _receiver_count[i] = _receiver_count[i-1];
553 }
554 _receiver[i] = receiver;
555 _receiver_count[i] = receiver_count;
556 if (_limit < MorphismLimit) _limit++;
557 }
558
559
560 void ciMethod::assert_virtual_call_type_ok(int bci) {
561 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
562 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
563 }
564
565 void ciMethod::assert_call_type_ok(int bci) {
566 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
567 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
568 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
569 }
570
571 /**
572 * Check whether profiling provides a type for the argument i to the
573 * call at bci bci
574 *
575 * @param [in]bci bci of the call
576 * @param [in]i argument number
577 * @param [out]type profiled type of argument, NULL if none
578 * @param [out]ptr_kind whether always null, never null or maybe null
579 * @return true if profiling exists
580 *
581 */
582 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
583 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
584 ciProfileData* data = method_data()->bci_to_data(bci);
585 if (data != NULL) {
586 if (data->is_VirtualCallTypeData()) {
587 assert_virtual_call_type_ok(bci);
588 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
589 if (i >= call->number_of_arguments()) {
590 return false;
591 }
592 type = call->valid_argument_type(i);
593 ptr_kind = call->argument_ptr_kind(i);
594 return true;
595 } else if (data->is_CallTypeData()) {
596 assert_call_type_ok(bci);
597 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
598 if (i >= call->number_of_arguments()) {
599 return false;
600 }
601 type = call->valid_argument_type(i);
602 ptr_kind = call->argument_ptr_kind(i);
603 return true;
604 }
605 }
606 }
607 return false;
608 }
609
610 /**
611 * Check whether profiling provides a type for the return value from
612 * the call at bci bci
613 *
614 * @param [in]bci bci of the call
615 * @param [out]type profiled type of argument, NULL if none
616 * @param [out]ptr_kind whether always null, never null or maybe null
617 * @return true if profiling exists
618 *
619 */
620 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
621 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
622 ciProfileData* data = method_data()->bci_to_data(bci);
623 if (data != NULL) {
624 if (data->is_VirtualCallTypeData()) {
625 assert_virtual_call_type_ok(bci);
626 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
627 if (call->has_return()) {
628 type = call->valid_return_type();
629 ptr_kind = call->return_ptr_kind();
630 return true;
631 }
632 } else if (data->is_CallTypeData()) {
633 assert_call_type_ok(bci);
634 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
635 if (call->has_return()) {
636 type = call->valid_return_type();
637 ptr_kind = call->return_ptr_kind();
638 }
639 return true;
640 }
641 }
642 }
643 return false;
644 }
645
646 /**
647 * Check whether profiling provides a type for the parameter i
648 *
649 * @param [in]i parameter number
650 * @param [out]type profiled type of parameter, NULL if none
651 * @param [out]ptr_kind whether always null, never null or maybe null
652 * @return true if profiling exists
653 *
654 */
655 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
656 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
657 ciParametersTypeData* parameters = method_data()->parameters_type_data();
658 if (parameters != NULL && i < parameters->number_of_parameters()) {
659 type = parameters->valid_parameter_type(i);
660 ptr_kind = parameters->parameter_ptr_kind(i);
661 return true;
662 }
663 }
664 return false;
665 }
666
667
668 // ------------------------------------------------------------------
669 // ciMethod::find_monomorphic_target
670 //
671 // Given a certain calling environment, find the monomorphic target
672 // for the call. Return NULL if the call is not monomorphic in
673 // its calling environment, or if there are only abstract methods.
674 // The returned method is never abstract.
675 // Note: If caller uses a non-null result, it must inform dependencies
676 // via assert_unique_concrete_method or assert_leaf_type.
677 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
678 ciInstanceKlass* callee_holder,
679 ciInstanceKlass* actual_recv,
680 bool check_access) {
681 check_is_loaded();
682
683 if (actual_recv->is_interface()) {
684 // %%% We cannot trust interface types, yet. See bug 6312651.
685 return NULL;
686 }
687
688 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
689 if (root_m == NULL) {
690 // Something went wrong looking up the actual receiver method.
691 return NULL;
692 }
693 assert(!root_m->is_abstract(), "resolve_invoke promise");
694
695 // Make certain quick checks even if UseCHA is false.
696
697 // Is it private or final?
698 if (root_m->can_be_statically_bound()) {
699 return root_m;
700 }
701
702 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
703 // Easy case. There is no other place to put a method, so don't bother
704 // to go through the VM_ENTRY_MARK and all the rest.
705 return root_m;
706 }
707
708 // Array methods (clone, hashCode, etc.) are always statically bound.
709 // If we were to see an array type here, we'd return root_m.
710 // However, this method processes only ciInstanceKlasses. (See 4962591.)
711 // The inline_native_clone intrinsic narrows Object to T[] properly,
712 // so there is no need to do the same job here.
713
714 if (!UseCHA) return NULL;
715
716 VM_ENTRY_MARK;
717
718 // Disable CHA for default methods for now
719 if (root_m->get_Method()->is_default_method()) {
720 return NULL;
721 }
722
723 methodHandle target;
724 {
725 MutexLocker locker(Compile_lock);
726 Klass* context = actual_recv->get_Klass();
727 target = Dependencies::find_unique_concrete_method(context,
728 root_m->get_Method());
729 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
730 }
731
732 #ifndef PRODUCT
733 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
734 tty->print("found a non-root unique target method");
735 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name());
736 tty->print(" method = ");
737 target->print_short_name(tty);
738 tty->cr();
739 }
740 #endif //PRODUCT
741
742 if (target() == NULL) {
743 return NULL;
744 }
745 if (target() == root_m->get_Method()) {
746 return root_m;
747 }
748 if (!root_m->is_public() &&
749 !root_m->is_protected()) {
750 // If we are going to reason about inheritance, it's easiest
751 // if the method in question is public, protected, or private.
752 // If the answer is not root_m, it is conservatively correct
753 // to return NULL, even if the CHA encountered irrelevant
754 // methods in other packages.
755 // %%% TO DO: Work out logic for package-private methods
756 // with the same name but different vtable indexes.
757 return NULL;
758 }
759 return CURRENT_THREAD_ENV->get_method(target());
760 }
761
762 // ------------------------------------------------------------------
763 // ciMethod::resolve_invoke
764 //
765 // Given a known receiver klass, find the target for the call.
766 // Return NULL if the call has no target or the target is abstract.
767 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
768 check_is_loaded();
769 VM_ENTRY_MARK;
770
771 Klass* caller_klass = caller->get_Klass();
772 Klass* recv = exact_receiver->get_Klass();
773 Klass* resolved = holder()->get_Klass();
774 Symbol* h_name = name()->get_symbol();
775 Symbol* h_signature = signature()->get_symbol();
776
777 LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
778 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
779 methodHandle m;
780 // Only do exact lookup if receiver klass has been linked. Otherwise,
781 // the vtable has not been setup, and the LinkResolver will fail.
782 if (recv->is_array_klass()
783 ||
784 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
785 if (holder()->is_interface()) {
786 m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
787 } else {
788 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
789 }
790 }
791
792 if (m.is_null()) {
793 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
794 return NULL;
795 }
796
797 ciMethod* result = this;
798 if (m() != get_Method()) {
799 result = CURRENT_THREAD_ENV->get_method(m());
800 }
801
802 // Don't return abstract methods because they aren't
803 // optimizable or interesting.
804 if (result->is_abstract()) {
805 return NULL;
806 } else {
807 return result;
808 }
809 }
810
811 // ------------------------------------------------------------------
812 // ciMethod::resolve_vtable_index
813 //
814 // Given a known receiver klass, find the vtable index for the call.
815 // Return Method::invalid_vtable_index if the vtable_index is unknown.
816 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
817 check_is_loaded();
818
819 int vtable_index = Method::invalid_vtable_index;
820 // Only do lookup if receiver klass has been linked. Otherwise,
821 // the vtable has not been setup, and the LinkResolver will fail.
822 if (!receiver->is_interface()
823 && (!receiver->is_instance_klass() ||
824 receiver->as_instance_klass()->is_linked())) {
825 VM_ENTRY_MARK;
826
827 Klass* caller_klass = caller->get_Klass();
828 Klass* recv = receiver->get_Klass();
829 Symbol* h_name = name()->get_symbol();
830 Symbol* h_signature = signature()->get_symbol();
831
832 LinkInfo link_info(recv, h_name, h_signature, caller_klass);
833 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
834 if (vtable_index == Method::nonvirtual_vtable_index) {
835 // A statically bound method. Return "no such index".
836 vtable_index = Method::invalid_vtable_index;
837 }
838 }
839
840 return vtable_index;
841 }
842
843 // ------------------------------------------------------------------
844 // ciMethod::interpreter_call_site_count
845 int ciMethod::interpreter_call_site_count(int bci) {
846 if (method_data() != NULL) {
847 ResourceMark rm;
848 ciProfileData* data = method_data()->bci_to_data(bci);
849 if (data != NULL && data->is_CounterData()) {
850 return scale_count(data->as_CounterData()->count());
851 }
852 }
853 return -1; // unknown
854 }
855
856 // ------------------------------------------------------------------
857 // ciMethod::get_field_at_bci
858 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
859 ciBytecodeStream iter(this);
860 iter.reset_to_bci(bci);
861 iter.next();
862 return iter.get_field(will_link);
863 }
864
865 // ------------------------------------------------------------------
866 // ciMethod::get_method_at_bci
867 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
868 ciBytecodeStream iter(this);
869 iter.reset_to_bci(bci);
870 iter.next();
871 return iter.get_method(will_link, declared_signature);
872 }
873
874 // ------------------------------------------------------------------
875 // Adjust a CounterData count to be commensurate with
876 // interpreter_invocation_count. If the MDO exists for
877 // only 25% of the time the method exists, then the
878 // counts in the MDO should be scaled by 4X, so that
879 // they can be usefully and stably compared against the
880 // invocation counts in methods.
881 int ciMethod::scale_count(int count, float prof_factor) {
882 if (count > 0 && method_data() != NULL) {
883 int counter_life;
884 int method_life = interpreter_invocation_count();
885 if (TieredCompilation) {
886 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
887 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
888 } else {
889 int current_mileage = method_data()->current_mileage();
890 int creation_mileage = method_data()->creation_mileage();
891 counter_life = current_mileage - creation_mileage;
892 }
893
894 // counter_life due to backedge_counter could be > method_life
895 if (counter_life > method_life)
896 counter_life = method_life;
897 if (0 < counter_life && counter_life <= method_life) {
898 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
899 count = (count > 0) ? count : 1;
900 }
901 }
902 return count;
903 }
904
905
906 // ------------------------------------------------------------------
907 // ciMethod::is_special_get_caller_class_method
908 //
909 bool ciMethod::is_ignored_by_security_stack_walk() const {
910 check_is_loaded();
911 VM_ENTRY_MARK;
912 return get_Method()->is_ignored_by_security_stack_walk();
913 }
914
915
916 // ------------------------------------------------------------------
917 // invokedynamic support
918
919 // ------------------------------------------------------------------
920 // ciMethod::is_method_handle_intrinsic
921 //
922 // Return true if the method is an instance of the JVM-generated
923 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
924 bool ciMethod::is_method_handle_intrinsic() const {
925 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
926 return (MethodHandles::is_signature_polymorphic(iid) &&
927 MethodHandles::is_signature_polymorphic_intrinsic(iid));
928 }
929
930 // ------------------------------------------------------------------
931 // ciMethod::is_compiled_lambda_form
932 //
933 // Return true if the method is a generated MethodHandle adapter.
934 // These are built by Java code.
935 bool ciMethod::is_compiled_lambda_form() const {
936 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
937 return iid == vmIntrinsics::_compiledLambdaForm;
938 }
939
940 // ------------------------------------------------------------------
941 // ciMethod::is_object_initializer
942 //
943 bool ciMethod::is_object_initializer() const {
944 return name() == ciSymbol::object_initializer_name();
945 }
946
947 // ------------------------------------------------------------------
948 // ciMethod::has_member_arg
949 //
950 // Return true if the method is a linker intrinsic like _linkToVirtual.
951 // These are built by the JVM.
952 bool ciMethod::has_member_arg() const {
953 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
954 return (MethodHandles::is_signature_polymorphic(iid) &&
955 MethodHandles::has_member_arg(iid));
956 }
957
958 // ------------------------------------------------------------------
959 // ciMethod::ensure_method_data
960 //
961 // Generate new MethodData* objects at compile time.
962 // Return true if allocation was successful or no MDO is required.
963 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
964 EXCEPTION_CONTEXT;
965 if (is_native() || is_abstract() || h_m()->is_accessor()) {
966 return true;
967 }
968 if (h_m()->method_data() == NULL) {
969 Method::build_interpreter_method_data(h_m, THREAD);
970 if (HAS_PENDING_EXCEPTION) {
971 CLEAR_PENDING_EXCEPTION;
972 }
973 }
974 if (h_m()->method_data() != NULL) {
975 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
976 _method_data->load_data();
977 return true;
978 } else {
979 _method_data = CURRENT_ENV->get_empty_methodData();
980 return false;
981 }
982 }
983
984 // public, retroactive version
985 bool ciMethod::ensure_method_data() {
986 bool result = true;
987 if (_method_data == NULL || _method_data->is_empty()) {
988 GUARDED_VM_ENTRY({
989 result = ensure_method_data(get_Method());
990 });
991 }
992 return result;
993 }
994
995
996 // ------------------------------------------------------------------
997 // ciMethod::method_data
998 //
999 ciMethodData* ciMethod::method_data() {
1000 if (_method_data != NULL) {
1001 return _method_data;
1002 }
1003 VM_ENTRY_MARK;
1004 ciEnv* env = CURRENT_ENV;
1005 Thread* my_thread = JavaThread::current();
1006 methodHandle h_m(my_thread, get_Method());
1007
1008 if (h_m()->method_data() != NULL) {
1009 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1010 _method_data->load_data();
1011 } else {
1012 _method_data = CURRENT_ENV->get_empty_methodData();
1013 }
1014 return _method_data;
1015
1016 }
1017
1018 // ------------------------------------------------------------------
1019 // ciMethod::method_data_or_null
1020 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1021 // NULL otherwise.
1022 ciMethodData* ciMethod::method_data_or_null() {
1023 ciMethodData *md = method_data();
1024 if (md->is_empty()) {
1025 return NULL;
1026 }
1027 return md;
1028 }
1029
1030 // ------------------------------------------------------------------
1031 // ciMethod::ensure_method_counters
1032 //
1033 MethodCounters* ciMethod::ensure_method_counters() {
1034 check_is_loaded();
1035 VM_ENTRY_MARK;
1036 methodHandle mh(THREAD, get_Method());
1037 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1038 return method_counters;
1039 }
1040
1041 // ------------------------------------------------------------------
1042 // ciMethod::has_option
1043 //
1044 bool ciMethod::has_option(const char* option) {
1045 check_is_loaded();
1046 VM_ENTRY_MARK;
1047 methodHandle mh(THREAD, get_Method());
1048 return CompilerOracle::has_option_string(mh, option);
1049 }
1050
1051 // ------------------------------------------------------------------
1052 // ciMethod::has_option_value
1053 //
1054 bool ciMethod::has_option_value(const char* option, double& value) {
1055 check_is_loaded();
1056 VM_ENTRY_MARK;
1057 methodHandle mh(THREAD, get_Method());
1058 return CompilerOracle::has_option_value(mh, option, value);
1059 }
1060 // ------------------------------------------------------------------
1061 // ciMethod::can_be_compiled
1062 //
1063 // Have previous compilations of this method succeeded?
1064 bool ciMethod::can_be_compiled() {
1065 check_is_loaded();
1066 ciEnv* env = CURRENT_ENV;
1067 if (is_c1_compile(env->comp_level())) {
1068 return _is_c1_compilable;
1069 }
1070 return _is_c2_compilable;
1071 }
1072
1073 // ------------------------------------------------------------------
1074 // ciMethod::set_not_compilable
1075 //
1076 // Tell the VM that this method cannot be compiled at all.
1077 void ciMethod::set_not_compilable(const char* reason) {
1078 check_is_loaded();
1079 VM_ENTRY_MARK;
1080 ciEnv* env = CURRENT_ENV;
1081 if (is_c1_compile(env->comp_level())) {
1082 _is_c1_compilable = false;
1083 } else {
1084 _is_c2_compilable = false;
1085 }
1086 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1087 }
1088
1089 // ------------------------------------------------------------------
1090 // ciMethod::can_be_osr_compiled
1091 //
1092 // Have previous compilations of this method succeeded?
1093 //
1094 // Implementation note: the VM does not currently keep track
1095 // of failed OSR compilations per bci. The entry_bci parameter
1096 // is currently unused.
1097 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1098 check_is_loaded();
1099 VM_ENTRY_MARK;
1100 ciEnv* env = CURRENT_ENV;
1101 return !get_Method()->is_not_osr_compilable(env->comp_level());
1102 }
1103
1104 // ------------------------------------------------------------------
1105 // ciMethod::has_compiled_code
1106 bool ciMethod::has_compiled_code() {
1107 return instructions_size() > 0;
1108 }
1109
1110 int ciMethod::comp_level() {
1111 check_is_loaded();
1112 VM_ENTRY_MARK;
1113 CompiledMethod* nm = get_Method()->code();
1114 if (nm != NULL) return nm->comp_level();
1115 return 0;
1116 }
1117
1118 int ciMethod::highest_osr_comp_level() {
1119 check_is_loaded();
1120 VM_ENTRY_MARK;
1121 return get_Method()->highest_osr_comp_level();
1122 }
1123
1124 // ------------------------------------------------------------------
1125 // ciMethod::code_size_for_inlining
1126 //
1127 // Code size for inlining decisions. This method returns a code
1128 // size of 1 for methods which has the ForceInline annotation.
1129 int ciMethod::code_size_for_inlining() {
1130 check_is_loaded();
1131 if (get_Method()->force_inline()) {
1132 return 1;
1133 }
1134 return code_size();
1135 }
1136
1137 // ------------------------------------------------------------------
1138 // ciMethod::instructions_size
1139 //
1140 // This is a rough metric for "fat" methods, compared before inlining
1141 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1142 // junk like exception handler, stubs, and constant table, which are
1143 // not highly relevant to an inlined method. So we use the more
1144 // specific accessor nmethod::insts_size.
1145 int ciMethod::instructions_size() {
1146 if (_instructions_size == -1) {
1147 GUARDED_VM_ENTRY(
1148 CompiledMethod* code = get_Method()->code();
1149 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1150 _instructions_size = code->insts_end() - code->verified_entry_point();
1151 } else {
1152 _instructions_size = 0;
1153 }
1154 );
1155 }
1156 return _instructions_size;
1157 }
1158
1159 // ------------------------------------------------------------------
1160 // ciMethod::log_nmethod_identity
1161 void ciMethod::log_nmethod_identity(xmlStream* log) {
1162 GUARDED_VM_ENTRY(
1163 CompiledMethod* code = get_Method()->code();
1164 if (code != NULL) {
1165 code->log_identity(log);
1166 }
1167 )
1168 }
1169
1170 // ------------------------------------------------------------------
1171 // ciMethod::is_not_reached
1172 bool ciMethod::is_not_reached(int bci) {
1173 check_is_loaded();
1174 VM_ENTRY_MARK;
1175 return Interpreter::is_not_reached(
1176 methodHandle(THREAD, get_Method()), bci);
1177 }
1178
1179 // ------------------------------------------------------------------
1180 // ciMethod::was_never_executed
1181 bool ciMethod::was_executed_more_than(int times) {
1182 VM_ENTRY_MARK;
1183 return get_Method()->was_executed_more_than(times);
1184 }
1185
1186 // ------------------------------------------------------------------
1187 // ciMethod::has_unloaded_classes_in_signature
1188 bool ciMethod::has_unloaded_classes_in_signature() {
1189 VM_ENTRY_MARK;
1190 {
1191 EXCEPTION_MARK;
1192 methodHandle m(THREAD, get_Method());
1193 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1194 if( HAS_PENDING_EXCEPTION ) {
1195 CLEAR_PENDING_EXCEPTION;
1196 return true; // Declare that we may have unloaded classes
1197 }
1198 return has_unloaded;
1199 }
1200 }
1201
1202 // ------------------------------------------------------------------
1203 // ciMethod::is_klass_loaded
1204 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1205 VM_ENTRY_MARK;
1206 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1207 }
1208
1209 // ------------------------------------------------------------------
1210 // ciMethod::check_call
1211 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1212 // This method is used only in C2 from InlineTree::ok_to_inline,
1213 // and is only used under -Xcomp or -XX:CompileTheWorld.
1214 // It appears to fail when applied to an invokeinterface call site.
1215 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1216 VM_ENTRY_MARK;
1217 {
1218 EXCEPTION_MARK;
1219 HandleMark hm(THREAD);
1220 constantPoolHandle pool (THREAD, get_Method()->constants());
1221 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1222 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1223 if (HAS_PENDING_EXCEPTION) {
1224 CLEAR_PENDING_EXCEPTION;
1225 return false;
1226 } else {
1227 return (spec_method->is_static() == is_static);
1228 }
1229 }
1230 return false;
1231 }
1232
1233 // ------------------------------------------------------------------
1234 // ciMethod::profile_aging
1235 //
1236 // Should the method be compiled with an age counter?
1237 bool ciMethod::profile_aging() const {
1238 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1239 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1240 }
1241 // ------------------------------------------------------------------
1242 // ciMethod::print_codes
1243 //
1244 // Print the bytecodes for this method.
1245 void ciMethod::print_codes_on(outputStream* st) {
1246 check_is_loaded();
1247 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1248 }
1249
1250
1251 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1252 check_is_loaded(); \
1253 VM_ENTRY_MARK; \
1254 return get_Method()->flag_accessor(); \
1255 }
1256
1257 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1258 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1259 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1260 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1261 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); }
1262 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); }
1263 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1264 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1265
1266 bool ciMethod::is_boxing_method() const {
1267 if (holder()->is_box_klass()) {
1268 switch (intrinsic_id()) {
1269 case vmIntrinsics::_Boolean_valueOf:
1270 case vmIntrinsics::_Byte_valueOf:
1271 case vmIntrinsics::_Character_valueOf:
1272 case vmIntrinsics::_Short_valueOf:
1273 case vmIntrinsics::_Integer_valueOf:
1274 case vmIntrinsics::_Long_valueOf:
1275 case vmIntrinsics::_Float_valueOf:
1276 case vmIntrinsics::_Double_valueOf:
1277 return true;
1278 default:
1279 return false;
1280 }
1281 }
1282 return false;
1283 }
1284
1285 bool ciMethod::is_unboxing_method() const {
1286 if (holder()->is_box_klass()) {
1287 switch (intrinsic_id()) {
1288 case vmIntrinsics::_booleanValue:
1289 case vmIntrinsics::_byteValue:
1290 case vmIntrinsics::_charValue:
1291 case vmIntrinsics::_shortValue:
1292 case vmIntrinsics::_intValue:
1293 case vmIntrinsics::_longValue:
1294 case vmIntrinsics::_floatValue:
1295 case vmIntrinsics::_doubleValue:
1296 return true;
1297 default:
1298 return false;
1299 }
1300 }
1301 return false;
1302 }
1303
1304 BCEscapeAnalyzer *ciMethod::get_bcea() {
1305 #ifdef COMPILER2
1306 if (_bcea == NULL) {
1307 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1308 }
1309 return _bcea;
1310 #else // COMPILER2
1311 ShouldNotReachHere();
1312 return NULL;
1313 #endif // COMPILER2
1314 }
1315
1316 ciMethodBlocks *ciMethod::get_method_blocks() {
1317 Arena *arena = CURRENT_ENV->arena();
1318 if (_method_blocks == NULL) {
1319 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1320 }
1321 return _method_blocks;
1322 }
1323
1324 #undef FETCH_FLAG_FROM_VM
1325
1326 void ciMethod::dump_name_as_ascii(outputStream* st) {
1327 Method* method = get_Method();
1328 st->print("%s %s %s",
1329 method->klass_name()->as_quoted_ascii(),
1330 method->name()->as_quoted_ascii(),
1331 method->signature()->as_quoted_ascii());
1332 }
1333
1334 void ciMethod::dump_replay_data(outputStream* st) {
1335 ResourceMark rm;
1336 Method* method = get_Method();
1337 MethodCounters* mcs = method->method_counters();
1338 st->print("ciMethod ");
1339 dump_name_as_ascii(st);
1340 st->print_cr(" %d %d %d %d %d",
1341 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1342 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1343 interpreter_invocation_count(),
1344 interpreter_throwout_count(),
1345 _instructions_size);
1346 }
1347
1348 // ------------------------------------------------------------------
1349 // ciMethod::print_codes
1350 //
1351 // Print a range of the bytecodes for this method.
1352 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1353 check_is_loaded();
1354 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1355 }
1356
1357 // ------------------------------------------------------------------
1358 // ciMethod::print_name
1359 //
1360 // Print the name of this method, including signature and some flags.
1361 void ciMethod::print_name(outputStream* st) {
1362 check_is_loaded();
1363 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1364 }
1365
1366 // ------------------------------------------------------------------
1367 // ciMethod::print_short_name
1368 //
1369 // Print the name of this method, without signature.
1370 void ciMethod::print_short_name(outputStream* st) {
1371 if (is_loaded()) {
1372 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1373 } else {
1374 // Fall back if method is not loaded.
1375 holder()->print_name_on(st);
1376 st->print("::");
1377 name()->print_symbol_on(st);
1378 if (WizardMode)
1379 signature()->as_symbol()->print_symbol_on(st);
1380 }
1381 }
1382
1383 // ------------------------------------------------------------------
1384 // ciMethod::print_impl
1385 //
1386 // Implementation of the print method.
1387 void ciMethod::print_impl(outputStream* st) {
1388 ciMetadata::print_impl(st);
1389 st->print(" name=");
1390 name()->print_symbol_on(st);
1391 st->print(" holder=");
1392 holder()->print_name_on(st);
1393 st->print(" signature=");
1394 signature()->as_symbol()->print_symbol_on(st);
1395 if (is_loaded()) {
1396 st->print(" loaded=true");
1397 st->print(" arg_size=%d", arg_size());
1398 st->print(" flags=");
1399 flags().print_member_flags(st);
1400 } else {
1401 st->print(" loaded=false");
1402 }
1403 }
1404
1405 // ------------------------------------------------------------------
1406
1407 static BasicType erase_to_word_type(BasicType bt) {
1408 if (is_subword_type(bt)) return T_INT;
1409 if (bt == T_ARRAY) return T_OBJECT;
1410 return bt;
1411 }
1412
1413 static bool basic_types_match(ciType* t1, ciType* t2) {
1414 if (t1 == t2) return true;
1415 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1416 }
1417
1418 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1419 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1420 !resolved_method->is_method_handle_intrinsic();
1421
1422 if (!invoke_through_mh_intrinsic) {
1423 // Method name & descriptor should stay the same.
1424 // Signatures may reference unloaded types and thus they may be not strictly equal.
1425 ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1426 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1427
1428 return (declared_method->name()->equals(resolved_method->name())) &&
1429 (declared_signature->equals(resolved_signature));
1430 }
1431
1432 ciMethod* linker = declared_method;
1433 ciMethod* target = resolved_method;
1434 // Linkers have appendix argument which is not passed to callee.
1435 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1436 if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1437 return false; // argument slot count mismatch
1438 }
1439
1440 ciSignature* linker_sig = linker->signature();
1441 ciSignature* target_sig = target->signature();
1442
1443 if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1444 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1445 return false; // argument count mismatch
1446 }
1447
1448 int sbase = 0, rbase = 0;
1449 switch (linker->intrinsic_id()) {
1450 case vmIntrinsics::_linkToVirtual:
1451 case vmIntrinsics::_linkToInterface:
1452 case vmIntrinsics::_linkToSpecial: {
1453 if (target->is_static()) {
1454 return false;
1455 }
1456 if (linker_sig->type_at(0)->is_primitive_type()) {
1457 return false; // receiver should be an oop
1458 }
1459 sbase = 1; // skip receiver
1460 break;
1461 }
1462 case vmIntrinsics::_linkToStatic: {
1463 if (!target->is_static()) {
1464 return false;
1465 }
1466 break;
1467 }
1468 case vmIntrinsics::_invokeBasic: {
1469 if (target->is_static()) {
1470 if (target_sig->type_at(0)->is_primitive_type()) {
1471 return false; // receiver should be an oop
1472 }
1473 rbase = 1; // skip receiver
1474 }
1475 break;
1476 }
1477 default:
1478 break;
1479 }
1480 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1481 int arg_count = target_sig->count() - rbase;
1482 for (int i = 0; i < arg_count; i++) {
1483 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1484 return false;
1485 }
1486 }
1487 // Only check the return type if the symbolic info has non-void return type.
1488 // I.e. the return value of the resolved method can be dropped.
1489 if (!linker->return_type()->is_void() &&
1490 !basic_types_match(linker->return_type(), target->return_type())) {
1491 return false;
1492 }
1493 return true; // no mismatch found
1494 }
1495
1496 // ------------------------------------------------------------------
1497
1498 #if INCLUDE_TRACE
1499 TraceStructCalleeMethod ciMethod::to_trace_struct() const {
1500 TraceStructCalleeMethod result;
1501 result.set_type(holder()->name()->as_utf8());
1502 result.set_name(name()->as_utf8());
1503 result.set_descriptor(signature()->as_symbol()->as_utf8());
1504 return result;
1505 }
1506 #endif