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