1 /*
2 * Copyright (c) 1999, 2013, 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/compilerOracle.hpp"
39 #include "compiler/methodLiveness.hpp"
40 #include "interpreter/interpreter.hpp"
41 #include "interpreter/linkResolver.hpp"
42 #include "interpreter/oopMapCache.hpp"
43 #include "memory/allocation.inline.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "oops/generateOopMap.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "utilities/bitMap.inline.hpp"
50 #include "utilities/xmlstream.hpp"
51 #ifdef COMPILER2
52 #include "ci/bcEscapeAnalyzer.hpp"
53 #include "ci/ciTypeFlow.hpp"
54 #include "oops/method.hpp"
55 #endif
56 #ifdef SHARK
57 #include "ci/ciTypeFlow.hpp"
58 #include "oops/method.hpp"
59 #endif
60
61 // ciMethod
62 //
63 // This class represents a Method* in the HotSpot virtual
64 // machine.
65
66
67 // ------------------------------------------------------------------
68 // ciMethod::ciMethod
69 //
70 // Loaded method.
71 ciMethod::ciMethod(methodHandle h_m) : ciMetadata(h_m()) {
72 assert(h_m() != NULL, "no null method");
73
74 // These fields are always filled in in loaded methods.
75 _flags = ciFlags(h_m()->access_flags());
76
77 // Easy to compute, so fill them in now.
78 _max_stack = h_m()->max_stack();
79 _max_locals = h_m()->max_locals();
80 _code_size = h_m()->code_size();
81 _intrinsic_id = h_m()->intrinsic_id();
82 _handler_count = h_m()->exception_table_length();
83 _size_of_parameters = h_m()->size_of_parameters();
84 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
85 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
86 _is_c1_compilable = !h_m()->is_not_c1_compilable();
87 _is_c2_compilable = !h_m()->is_not_c2_compilable();
88 // Lazy fields, filled in on demand. Require allocation.
89 _code = NULL;
90 _exception_handlers = NULL;
91 _liveness = NULL;
92 _method_blocks = NULL;
93 #if defined(COMPILER2) || defined(SHARK)
94 _flow = NULL;
95 _bcea = NULL;
96 #endif // COMPILER2 || SHARK
97
98 ciEnv *env = CURRENT_ENV;
99 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
100 // 6328518 check hotswap conditions under the right lock.
101 MutexLocker locker(Compile_lock);
102 if (Dependencies::check_evol_method(h_m()) != NULL) {
103 _is_c1_compilable = false;
104 _is_c2_compilable = false;
105 }
106 } else {
107 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
108 }
109
110 if (h_m()->method_holder()->is_linked()) {
111 _can_be_statically_bound = h_m()->can_be_statically_bound();
112 } else {
113 // Have to use a conservative value in this case.
114 _can_be_statically_bound = false;
115 }
116
117 // Adjust the definition of this condition to be more useful:
118 // %%% take these conditions into account in vtable generation
119 if (!_can_be_statically_bound && h_m()->is_private())
120 _can_be_statically_bound = true;
121 if (_can_be_statically_bound && h_m()->is_abstract())
122 _can_be_statically_bound = false;
123
124 // generating _signature may allow GC and therefore move m.
125 // These fields are always filled in.
126 _name = env->get_symbol(h_m()->name());
127 _holder = env->get_instance_klass(h_m()->method_holder());
128 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
129 constantPoolHandle cpool = h_m()->constants();
130 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
131 _method_data = NULL;
132 _nmethod_age = h_m()->nmethod_age();
133 // Take a snapshot of these values, so they will be commensurate with the MDO.
134 if (ProfileInterpreter || TieredCompilation) {
135 int invcnt = h_m()->interpreter_invocation_count();
136 // if the value overflowed report it as max int
137 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
138 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
139 } else {
140 _interpreter_invocation_count = 0;
141 _interpreter_throwout_count = 0;
142 }
143 if (_interpreter_invocation_count == 0)
144 _interpreter_invocation_count = 1;
145 _instructions_size = -1;
146 #ifdef ASSERT
147 if (ReplayCompiles) {
148 ciReplay::initialize(this);
149 }
150 #endif
151 }
152
153
154 // ------------------------------------------------------------------
155 // ciMethod::ciMethod
156 //
157 // Unloaded method.
158 ciMethod::ciMethod(ciInstanceKlass* holder,
159 ciSymbol* name,
160 ciSymbol* signature,
161 ciInstanceKlass* accessor) :
162 ciMetadata((Metadata*)NULL),
163 _name( name),
164 _holder( holder),
165 _intrinsic_id( vmIntrinsics::_none),
166 _liveness( NULL),
167 _can_be_statically_bound(false),
168 _method_blocks( NULL),
169 _method_data( NULL)
170 #if defined(COMPILER2) || defined(SHARK)
171 ,
172 _flow( NULL),
173 _bcea( NULL),
174 _instructions_size(-1)
175 #endif // COMPILER2 || SHARK
176 {
177 // Usually holder and accessor are the same type but in some cases
178 // the holder has the wrong class loader (e.g. invokedynamic call
179 // sites) so we pass the accessor.
180 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
181 }
182
183
184 // ------------------------------------------------------------------
185 // ciMethod::load_code
186 //
187 // Load the bytecodes and exception handler table for this method.
188 void ciMethod::load_code() {
189 VM_ENTRY_MARK;
190 assert(is_loaded(), "only loaded methods have code");
191
192 Method* me = get_Method();
193 Arena* arena = CURRENT_THREAD_ENV->arena();
194
195 // Load the bytecodes.
196 _code = (address)arena->Amalloc(code_size());
197 memcpy(_code, me->code_base(), code_size());
198
199 // Revert any breakpoint bytecodes in ci's copy
200 if (me->number_of_breakpoints() > 0) {
201 BreakpointInfo* bp = me->method_holder()->breakpoints();
202 for (; bp != NULL; bp = bp->next()) {
203 if (bp->match(me)) {
204 code_at_put(bp->bci(), bp->orig_bytecode());
205 }
206 }
207 }
208
209 // And load the exception table.
210 ExceptionTable exc_table(me);
211
212 // Allocate one extra spot in our list of exceptions. This
213 // last entry will be used to represent the possibility that
214 // an exception escapes the method. See ciExceptionHandlerStream
215 // for details.
216 _exception_handlers =
217 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
218 * (_handler_count + 1));
219 if (_handler_count > 0) {
220 for (int i=0; i<_handler_count; i++) {
221 _exception_handlers[i] = new (arena) ciExceptionHandler(
222 holder(),
223 /* start */ exc_table.start_pc(i),
224 /* limit */ exc_table.end_pc(i),
225 /* goto pc */ exc_table.handler_pc(i),
226 /* cp index */ exc_table.catch_type_index(i));
227 }
228 }
229
230 // Put an entry at the end of our list to represent the possibility
231 // of exceptional exit.
232 _exception_handlers[_handler_count] =
233 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
234
235 if (CIPrintMethodCodes) {
236 print_codes();
237 }
238 }
239
240
241 // ------------------------------------------------------------------
242 // ciMethod::has_linenumber_table
243 //
244 // length unknown until decompression
245 bool ciMethod::has_linenumber_table() const {
246 check_is_loaded();
247 VM_ENTRY_MARK;
248 return get_Method()->has_linenumber_table();
249 }
250
251
252 // ------------------------------------------------------------------
253 // ciMethod::compressed_linenumber_table
254 u_char* ciMethod::compressed_linenumber_table() const {
255 check_is_loaded();
256 VM_ENTRY_MARK;
257 return get_Method()->compressed_linenumber_table();
258 }
259
260
261 // ------------------------------------------------------------------
262 // ciMethod::line_number_from_bci
263 int ciMethod::line_number_from_bci(int bci) const {
264 check_is_loaded();
265 VM_ENTRY_MARK;
266 return get_Method()->line_number_from_bci(bci);
267 }
268
269
270 // ------------------------------------------------------------------
271 // ciMethod::vtable_index
272 //
273 // Get the position of this method's entry in the vtable, if any.
274 int ciMethod::vtable_index() {
275 check_is_loaded();
276 assert(holder()->is_linked(), "must be linked");
277 VM_ENTRY_MARK;
278 return get_Method()->vtable_index();
279 }
280
281
282 #ifdef SHARK
283 // ------------------------------------------------------------------
284 // ciMethod::itable_index
285 //
286 // Get the position of this method's entry in the itable, if any.
287 int ciMethod::itable_index() {
288 check_is_loaded();
289 assert(holder()->is_linked(), "must be linked");
290 VM_ENTRY_MARK;
291 Method* m = get_Method();
292 if (!m->has_itable_index())
293 return Method::nonvirtual_vtable_index;
294 return m->itable_index();
295 }
296 #endif // SHARK
297
298
299 // ------------------------------------------------------------------
300 // ciMethod::native_entry
301 //
302 // Get the address of this method's native code, if any.
303 address ciMethod::native_entry() {
304 check_is_loaded();
305 assert(flags().is_native(), "must be native method");
306 VM_ENTRY_MARK;
307 Method* method = get_Method();
308 address entry = method->native_function();
309 assert(entry != NULL, "must be valid entry point");
310 return entry;
311 }
312
313
314 // ------------------------------------------------------------------
315 // ciMethod::interpreter_entry
316 //
317 // Get the entry point for running this method in the interpreter.
318 address ciMethod::interpreter_entry() {
319 check_is_loaded();
320 VM_ENTRY_MARK;
321 methodHandle mh(THREAD, get_Method());
322 return Interpreter::entry_for_method(mh);
323 }
324
325
326 // ------------------------------------------------------------------
327 // ciMethod::uses_balanced_monitors
328 //
329 // Does this method use monitors in a strict stack-disciplined manner?
330 bool ciMethod::has_balanced_monitors() {
331 check_is_loaded();
332 if (_balanced_monitors) return true;
333
334 // Analyze the method to see if monitors are used properly.
335 VM_ENTRY_MARK;
336 methodHandle method(THREAD, get_Method());
337 assert(method->has_monitor_bytecodes(), "should have checked this");
338
339 // Check to see if a previous compilation computed the
340 // monitor-matching analysis.
341 if (method->guaranteed_monitor_matching()) {
342 _balanced_monitors = true;
343 return true;
344 }
345
346 {
347 EXCEPTION_MARK;
348 ResourceMark rm(THREAD);
349 GeneratePairingInfo gpi(method);
350 gpi.compute_map(CATCH);
351 if (!gpi.monitor_safe()) {
352 return false;
353 }
354 method->set_guaranteed_monitor_matching();
355 _balanced_monitors = true;
356 }
357 return true;
358 }
359
360
361 // ------------------------------------------------------------------
362 // ciMethod::get_flow_analysis
363 ciTypeFlow* ciMethod::get_flow_analysis() {
364 #if defined(COMPILER2) || defined(SHARK)
365 if (_flow == NULL) {
366 ciEnv* env = CURRENT_ENV;
367 _flow = new (env->arena()) ciTypeFlow(env, this);
368 _flow->do_flow();
369 }
370 return _flow;
371 #else // COMPILER2 || SHARK
372 ShouldNotReachHere();
373 return NULL;
374 #endif // COMPILER2 || SHARK
375 }
376
377
378 // ------------------------------------------------------------------
379 // ciMethod::get_osr_flow_analysis
380 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
381 #if defined(COMPILER2) || defined(SHARK)
382 // OSR entry points are always place after a call bytecode of some sort
383 assert(osr_bci >= 0, "must supply valid OSR entry point");
384 ciEnv* env = CURRENT_ENV;
385 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
386 flow->do_flow();
387 return flow;
388 #else // COMPILER2 || SHARK
389 ShouldNotReachHere();
390 return NULL;
391 #endif // COMPILER2 || SHARK
392 }
393
394 // ------------------------------------------------------------------
395 // ciMethod::raw_liveness_at_bci
396 //
397 // Which local variables are live at a specific bci?
398 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
399 check_is_loaded();
400 if (_liveness == NULL) {
401 // Create the liveness analyzer.
402 Arena* arena = CURRENT_ENV->arena();
403 _liveness = new (arena) MethodLiveness(arena, this);
404 _liveness->compute_liveness();
405 }
406 return _liveness->get_liveness_at(bci);
407 }
408
409 // ------------------------------------------------------------------
410 // ciMethod::liveness_at_bci
411 //
412 // Which local variables are live at a specific bci? When debugging
413 // will return true for all locals in some cases to improve debug
414 // information.
415 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
416 MethodLivenessResult result = raw_liveness_at_bci(bci);
417 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
418 // Keep all locals live for the user's edification and amusement.
419 result.at_put_range(0, result.size(), true);
420 }
421 return result;
422 }
423
424 // ciMethod::live_local_oops_at_bci
425 //
426 // find all the live oops in the locals array for a particular bci
427 // Compute what the interpreter believes by using the interpreter
428 // oopmap generator. This is used as a double check during osr to
429 // guard against conservative result from MethodLiveness making us
430 // think a dead oop is live. MethodLiveness is conservative in the
431 // sense that it may consider locals to be live which cannot be live,
432 // like in the case where a local could contain an oop or a primitive
433 // along different paths. In that case the local must be dead when
434 // those paths merge. Since the interpreter's viewpoint is used when
435 // gc'ing an interpreter frame we need to use its viewpoint during
436 // OSR when loading the locals.
437
438 BitMap ciMethod::live_local_oops_at_bci(int bci) {
439 VM_ENTRY_MARK;
440 InterpreterOopMap mask;
441 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
442 int mask_size = max_locals();
443 BitMap result(mask_size);
444 result.clear();
445 int i;
446 for (i = 0; i < mask_size ; i++ ) {
447 if (mask.is_oop(i)) result.set_bit(i);
448 }
449 return result;
450 }
451
452
453 #ifdef COMPILER1
454 // ------------------------------------------------------------------
455 // ciMethod::bci_block_start
456 //
457 // Marks all bcis where a new basic block starts
458 const BitMap ciMethod::bci_block_start() {
459 check_is_loaded();
460 if (_liveness == NULL) {
461 // Create the liveness analyzer.
462 Arena* arena = CURRENT_ENV->arena();
463 _liveness = new (arena) MethodLiveness(arena, this);
464 _liveness->compute_liveness();
465 }
466
467 return _liveness->get_bci_block_start();
468 }
469 #endif // COMPILER1
470
471
472 // ------------------------------------------------------------------
473 // ciMethod::call_profile_at_bci
474 //
475 // Get the ciCallProfile for the invocation of this method.
476 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
477 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
478 ResourceMark rm;
479 ciCallProfile result;
480 if (method_data() != NULL && method_data()->is_mature()) {
481 ciProfileData* data = method_data()->bci_to_data(bci);
482 if (data != NULL && data->is_CounterData()) {
483 // Every profiled call site has a counter.
484 int count = data->as_CounterData()->count();
485
486 if (!data->is_ReceiverTypeData()) {
487 result._receiver_count[0] = 0; // that's a definite zero
488 } else { // ReceiverTypeData is a subclass of CounterData
489 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
490 // In addition, virtual call sites have receiver type information
491 int receivers_count_total = 0;
492 int morphism = 0;
493 // Precompute morphism for the possible fixup
494 for (uint i = 0; i < call->row_limit(); i++) {
495 ciKlass* receiver = call->receiver(i);
496 if (receiver == NULL) continue;
497 morphism++;
498 }
499 int epsilon = 0;
500 if (TieredCompilation && ProfileInterpreter) {
501 // Interpreter and C1 treat final and special invokes differently.
502 // C1 will record a type, whereas the interpreter will just
503 // increment the count. Detect this case.
504 if (morphism == 1 && count > 0) {
505 epsilon = count;
506 count = 0;
507 }
508 }
509 for (uint i = 0; i < call->row_limit(); i++) {
510 ciKlass* receiver = call->receiver(i);
511 if (receiver == NULL) continue;
512 int rcount = call->receiver_count(i) + epsilon;
513 if (rcount == 0) rcount = 1; // Should be valid value
514 receivers_count_total += rcount;
515 // Add the receiver to result data.
516 result.add_receiver(receiver, rcount);
517 // If we extend profiling to record methods,
518 // we will set result._method also.
519 }
520 // Determine call site's morphism.
521 // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
522 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
523 // The call site count is > 0 in the case of a polymorphic virtual call.
524 if (morphism > 0 && morphism == result._limit) {
525 // The morphism <= MorphismLimit.
526 if ((morphism < ciCallProfile::MorphismLimit) ||
527 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
528 #ifdef ASSERT
529 if (count > 0) {
530 this->print_short_name(tty);
531 tty->print_cr(" @ bci:%d", bci);
532 this->print_codes();
533 assert(false, "this call site should not be polymorphic");
534 }
535 #endif
536 result._morphism = morphism;
537 }
538 }
539 // Make the count consistent if this is a call profile. If count is
540 // zero or less, presume that this is a typecheck profile and
541 // do nothing. Otherwise, increase count to be the sum of all
542 // receiver's counts.
543 if (count >= 0) {
544 count += receivers_count_total;
545 }
546 }
547 result._count = count;
548 }
549 }
550 return result;
551 }
552
553 // ------------------------------------------------------------------
554 // Add new receiver and sort data by receiver's profile count.
555 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
556 // Add new receiver and sort data by receiver's counts when we have space
557 // for it otherwise replace the less called receiver (less called receiver
558 // is placed to the last array element which is not used).
559 // First array's element contains most called receiver.
560 int i = _limit;
561 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
562 _receiver[i] = _receiver[i-1];
563 _receiver_count[i] = _receiver_count[i-1];
564 }
565 _receiver[i] = receiver;
566 _receiver_count[i] = receiver_count;
567 if (_limit < MorphismLimit) _limit++;
568 }
569
570
571 void ciMethod::assert_virtual_call_type_ok(int bci) {
572 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
573 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
574 }
575
576 void ciMethod::assert_call_type_ok(int bci) {
577 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
578 java_code_at_bci(bci) == Bytecodes::_invokespecial ||
579 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
580 }
581
582 /**
583 * Check whether profiling provides a type for the argument i to the
584 * call at bci bci
585 *
586 * @param [in]bci bci of the call
587 * @param [in]i argument number
588 * @param [out]type profiled type of argument, NULL if none
589 * @param [out]maybe_null true if null was seen for argument
590 * @return true if profiling exists
591 *
592 */
593 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) {
594 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
595 ciProfileData* data = method_data()->bci_to_data(bci);
596 if (data != NULL) {
597 if (data->is_VirtualCallTypeData()) {
598 assert_virtual_call_type_ok(bci);
599 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
600 if (i >= call->number_of_arguments()) {
601 return false;
602 }
603 type = call->valid_argument_type(i);
604 maybe_null = call->argument_maybe_null(i);
605 return true;
606 } else if (data->is_CallTypeData()) {
607 assert_call_type_ok(bci);
608 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
609 if (i >= call->number_of_arguments()) {
610 return false;
611 }
612 type = call->valid_argument_type(i);
613 maybe_null = call->argument_maybe_null(i);
614 return true;
615 }
616 }
617 }
618 return false;
619 }
620
621 /**
622 * Check whether profiling provides a type for the return value from
623 * the call at bci bci
624 *
625 * @param [in]bci bci of the call
626 * @param [out]type profiled type of argument, NULL if none
627 * @param [out]maybe_null true if null was seen for argument
628 * @return true if profiling exists
629 *
630 */
631 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
632 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
633 ciProfileData* data = method_data()->bci_to_data(bci);
634 if (data != NULL) {
635 if (data->is_VirtualCallTypeData()) {
636 assert_virtual_call_type_ok(bci);
637 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
638 type = call->valid_return_type();
639 maybe_null = call->return_maybe_null();
640 return true;
641 } else if (data->is_CallTypeData()) {
642 assert_call_type_ok(bci);
643 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
644 type = call->valid_return_type();
645 maybe_null = call->return_maybe_null();
646 return true;
647 }
648 }
649 }
650 return false;
651 }
652
653 /**
654 * Check whether profiling provides a type for the parameter i
655 *
656 * @param [in]i parameter number
657 * @param [out]type profiled type of parameter, NULL if none
658 * @param [out]maybe_null true if null was seen for parameter
659 * @return true if profiling exists
660 *
661 */
662 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
663 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
664 ciParametersTypeData* parameters = method_data()->parameters_type_data();
665 if (parameters != NULL && i < parameters->number_of_parameters()) {
666 type = parameters->valid_parameter_type(i);
667 maybe_null = parameters->parameter_maybe_null(i);
668 return true;
669 }
670 }
671 return false;
672 }
673
674
675 // ------------------------------------------------------------------
676 // ciMethod::find_monomorphic_target
677 //
678 // Given a certain calling environment, find the monomorphic target
679 // for the call. Return NULL if the call is not monomorphic in
680 // its calling environment, or if there are only abstract methods.
681 // The returned method is never abstract.
682 // Note: If caller uses a non-null result, it must inform dependencies
683 // via assert_unique_concrete_method or assert_leaf_type.
684 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
685 ciInstanceKlass* callee_holder,
686 ciInstanceKlass* actual_recv) {
687 check_is_loaded();
688
689 if (actual_recv->is_interface()) {
690 // %%% We cannot trust interface types, yet. See bug 6312651.
691 return NULL;
692 }
693
694 ciMethod* root_m = resolve_invoke(caller, actual_recv);
695 if (root_m == NULL) {
696 // Something went wrong looking up the actual receiver method.
697 return NULL;
698 }
699 assert(!root_m->is_abstract(), "resolve_invoke promise");
700
701 // Make certain quick checks even if UseCHA is false.
702
703 // Is it private or final?
704 if (root_m->can_be_statically_bound()) {
705 return root_m;
706 }
707
708 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
709 // Easy case. There is no other place to put a method, so don't bother
710 // to go through the VM_ENTRY_MARK and all the rest.
711 return root_m;
712 }
713
714 // Array methods (clone, hashCode, etc.) are always statically bound.
715 // If we were to see an array type here, we'd return root_m.
716 // However, this method processes only ciInstanceKlasses. (See 4962591.)
717 // The inline_native_clone intrinsic narrows Object to T[] properly,
718 // so there is no need to do the same job here.
719
720 if (!UseCHA) return NULL;
721
722 VM_ENTRY_MARK;
723
724 // Disable CHA for default methods for now
725 if (root_m->get_Method()->is_default_method()) {
726 return NULL;
727 }
728
729 methodHandle target;
730 {
731 MutexLocker locker(Compile_lock);
732 Klass* context = actual_recv->get_Klass();
733 target = Dependencies::find_unique_concrete_method(context,
734 root_m->get_Method());
735 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
736 }
737
738 #ifndef PRODUCT
739 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
740 tty->print("found a non-root unique target method");
741 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
742 tty->print(" method = ");
743 target->print_short_name(tty);
744 tty->cr();
745 }
746 #endif //PRODUCT
747
748 if (target() == NULL) {
749 return NULL;
750 }
751 if (target() == root_m->get_Method()) {
752 return root_m;
753 }
754 if (!root_m->is_public() &&
755 !root_m->is_protected()) {
756 // If we are going to reason about inheritance, it's easiest
757 // if the method in question is public, protected, or private.
758 // If the answer is not root_m, it is conservatively correct
759 // to return NULL, even if the CHA encountered irrelevant
760 // methods in other packages.
761 // %%% TO DO: Work out logic for package-private methods
762 // with the same name but different vtable indexes.
763 return NULL;
764 }
765 return CURRENT_THREAD_ENV->get_method(target());
766 }
767
768 // ------------------------------------------------------------------
769 // ciMethod::resolve_invoke
770 //
771 // Given a known receiver klass, find the target for the call.
772 // Return NULL if the call has no target or the target is abstract.
773 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
774 check_is_loaded();
775 VM_ENTRY_MARK;
776
777 KlassHandle caller_klass (THREAD, caller->get_Klass());
778 KlassHandle h_recv (THREAD, exact_receiver->get_Klass());
779 KlassHandle h_resolved (THREAD, holder()->get_Klass());
780 Symbol* h_name = name()->get_symbol();
781 Symbol* h_signature = signature()->get_symbol();
782
783 methodHandle m;
784 // Only do exact lookup if receiver klass has been linked. Otherwise,
785 // the vtable has not been setup, and the LinkResolver will fail.
786 if (h_recv->oop_is_array()
787 ||
788 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
789 if (holder()->is_interface()) {
790 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
791 } else {
792 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
793 }
794 }
795
796 if (m.is_null()) {
797 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
798 return NULL;
799 }
800
801 ciMethod* result = this;
802 if (m() != get_Method()) {
803 result = CURRENT_THREAD_ENV->get_method(m());
804 }
805
806 // Don't return abstract methods because they aren't
807 // optimizable or interesting.
808 if (result->is_abstract()) {
809 return NULL;
810 } else {
811 return result;
812 }
813 }
814
815 // ------------------------------------------------------------------
816 // ciMethod::resolve_vtable_index
817 //
818 // Given a known receiver klass, find the vtable index for the call.
819 // Return Method::invalid_vtable_index if the vtable_index is unknown.
820 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
821 check_is_loaded();
822
823 int vtable_index = Method::invalid_vtable_index;
824 // Only do lookup if receiver klass has been linked. Otherwise,
825 // the vtable has not been setup, and the LinkResolver will fail.
826 if (!receiver->is_interface()
827 && (!receiver->is_instance_klass() ||
828 receiver->as_instance_klass()->is_linked())) {
829 VM_ENTRY_MARK;
830
831 KlassHandle caller_klass (THREAD, caller->get_Klass());
832 KlassHandle h_recv (THREAD, receiver->get_Klass());
833 Symbol* h_name = name()->get_symbol();
834 Symbol* h_signature = signature()->get_symbol();
835
836 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
837 if (vtable_index == Method::nonvirtual_vtable_index) {
838 // A statically bound method. Return "no such index".
839 vtable_index = Method::invalid_vtable_index;
840 }
841 }
842
843 return vtable_index;
844 }
845
846 // ------------------------------------------------------------------
847 // ciMethod::interpreter_call_site_count
848 int ciMethod::interpreter_call_site_count(int bci) {
849 if (method_data() != NULL) {
850 ResourceMark rm;
851 ciProfileData* data = method_data()->bci_to_data(bci);
852 if (data != NULL && data->is_CounterData()) {
853 return scale_count(data->as_CounterData()->count());
854 }
855 }
856 return -1; // unknown
857 }
858
859 // ------------------------------------------------------------------
860 // ciMethod::get_field_at_bci
861 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
862 ciBytecodeStream iter(this);
863 iter.reset_to_bci(bci);
864 iter.next();
865 return iter.get_field(will_link);
866 }
867
868 // ------------------------------------------------------------------
869 // ciMethod::get_method_at_bci
870 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
871 ciBytecodeStream iter(this);
872 iter.reset_to_bci(bci);
873 iter.next();
874 return iter.get_method(will_link, declared_signature);
875 }
876
877 // ------------------------------------------------------------------
878 // Adjust a CounterData count to be commensurate with
879 // interpreter_invocation_count. If the MDO exists for
880 // only 25% of the time the method exists, then the
881 // counts in the MDO should be scaled by 4X, so that
882 // they can be usefully and stably compared against the
883 // invocation counts in methods.
884 int ciMethod::scale_count(int count, float prof_factor) {
885 if (count > 0 && method_data() != NULL) {
886 int counter_life;
887 int method_life = interpreter_invocation_count();
888 if (TieredCompilation) {
889 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
890 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
891 } else {
892 int current_mileage = method_data()->current_mileage();
893 int creation_mileage = method_data()->creation_mileage();
894 counter_life = current_mileage - creation_mileage;
895 }
896
897 // counter_life due to backedge_counter could be > method_life
898 if (counter_life > method_life)
899 counter_life = method_life;
900 if (0 < counter_life && counter_life <= method_life) {
901 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
902 count = (count > 0) ? count : 1;
903 }
904 }
905 return count;
906 }
907
908
909 // ------------------------------------------------------------------
910 // ciMethod::is_special_get_caller_class_method
911 //
912 bool ciMethod::is_ignored_by_security_stack_walk() const {
913 check_is_loaded();
914 VM_ENTRY_MARK;
915 return get_Method()->is_ignored_by_security_stack_walk();
916 }
917
918
919 // ------------------------------------------------------------------
920 // invokedynamic support
921
922 // ------------------------------------------------------------------
923 // ciMethod::is_method_handle_intrinsic
924 //
925 // Return true if the method is an instance of the JVM-generated
926 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
927 bool ciMethod::is_method_handle_intrinsic() const {
928 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
929 return (MethodHandles::is_signature_polymorphic(iid) &&
930 MethodHandles::is_signature_polymorphic_intrinsic(iid));
931 }
932
933 // ------------------------------------------------------------------
934 // ciMethod::is_compiled_lambda_form
935 //
936 // Return true if the method is a generated MethodHandle adapter.
937 // These are built by Java code.
938 bool ciMethod::is_compiled_lambda_form() const {
939 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
940 return iid == vmIntrinsics::_compiledLambdaForm;
941 }
942
943 // ------------------------------------------------------------------
944 // ciMethod::has_member_arg
945 //
946 // Return true if the method is a linker intrinsic like _linkToVirtual.
947 // These are built by the JVM.
948 bool ciMethod::has_member_arg() const {
949 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
950 return (MethodHandles::is_signature_polymorphic(iid) &&
951 MethodHandles::has_member_arg(iid));
952 }
953
954 // ------------------------------------------------------------------
955 // ciMethod::ensure_method_data
956 //
957 // Generate new MethodData* objects at compile time.
958 // Return true if allocation was successful or no MDO is required.
959 bool ciMethod::ensure_method_data(methodHandle h_m) {
960 EXCEPTION_CONTEXT;
961 if (is_native() || is_abstract() || h_m()->is_accessor()) {
962 return true;
963 }
964 if (h_m()->method_data() == NULL) {
965 Method::build_interpreter_method_data(h_m, THREAD);
966 if (HAS_PENDING_EXCEPTION) {
967 CLEAR_PENDING_EXCEPTION;
968 }
969 }
970 if (h_m()->method_data() != NULL) {
971 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
972 _method_data->load_data();
973 return true;
974 } else {
975 _method_data = CURRENT_ENV->get_empty_methodData();
976 return false;
977 }
978 }
979
980 // public, retroactive version
981 bool ciMethod::ensure_method_data() {
982 bool result = true;
983 if (_method_data == NULL || _method_data->is_empty()) {
984 GUARDED_VM_ENTRY({
985 result = ensure_method_data(get_Method());
986 });
987 }
988 return result;
989 }
990
991
992 // ------------------------------------------------------------------
993 // ciMethod::method_data
994 //
995 ciMethodData* ciMethod::method_data() {
996 if (_method_data != NULL) {
997 return _method_data;
998 }
999 VM_ENTRY_MARK;
1000 ciEnv* env = CURRENT_ENV;
1001 Thread* my_thread = JavaThread::current();
1002 methodHandle h_m(my_thread, get_Method());
1003
1004 if (h_m()->method_data() != NULL) {
1005 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1006 _method_data->load_data();
1007 } else {
1008 _method_data = CURRENT_ENV->get_empty_methodData();
1009 }
1010 return _method_data;
1011
1012 }
1013
1014 // ------------------------------------------------------------------
1015 // ciMethod::method_data_or_null
1016 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1017 // NULL otherwise.
1018 ciMethodData* ciMethod::method_data_or_null() {
1019 ciMethodData *md = method_data();
1020 if (md->is_empty()) {
1021 return NULL;
1022 }
1023 return md;
1024 }
1025
1026 // ------------------------------------------------------------------
1027 // ciMethod::ensure_method_counters
1028 //
1029 MethodCounters* ciMethod::ensure_method_counters() {
1030 check_is_loaded();
1031 VM_ENTRY_MARK;
1032 methodHandle mh(THREAD, get_Method());
1033 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1034 return method_counters;
1035 }
1036
1037 // ------------------------------------------------------------------
1038 // ciMethod::should_exclude
1039 //
1040 // Should this method be excluded from compilation?
1041 bool ciMethod::should_exclude() {
1042 check_is_loaded();
1043 VM_ENTRY_MARK;
1044 methodHandle mh(THREAD, get_Method());
1045 bool ignore;
1046 return CompilerOracle::should_exclude(mh, ignore);
1047 }
1048
1049 // ------------------------------------------------------------------
1050 // ciMethod::should_inline
1051 //
1052 // Should this method be inlined during compilation?
1053 bool ciMethod::should_inline() {
1054 check_is_loaded();
1055 VM_ENTRY_MARK;
1056 methodHandle mh(THREAD, get_Method());
1057 return CompilerOracle::should_inline(mh);
1058 }
1059
1060 // ------------------------------------------------------------------
1061 // ciMethod::should_not_inline
1062 //
1063 // Should this method be disallowed from inlining during compilation?
1064 bool ciMethod::should_not_inline() {
1065 check_is_loaded();
1066 VM_ENTRY_MARK;
1067 methodHandle mh(THREAD, get_Method());
1068 return CompilerOracle::should_not_inline(mh);
1069 }
1070
1071 // ------------------------------------------------------------------
1072 // ciMethod::should_print_assembly
1073 //
1074 // Should the compiler print the generated code for this method?
1075 bool ciMethod::should_print_assembly() {
1076 check_is_loaded();
1077 VM_ENTRY_MARK;
1078 methodHandle mh(THREAD, get_Method());
1079 return CompilerOracle::should_print(mh);
1080 }
1081
1082 // ------------------------------------------------------------------
1083 // ciMethod::break_at_execute
1084 //
1085 // Should the compiler insert a breakpoint into the generated code
1086 // method?
1087 bool ciMethod::break_at_execute() {
1088 check_is_loaded();
1089 VM_ENTRY_MARK;
1090 methodHandle mh(THREAD, get_Method());
1091 return CompilerOracle::should_break_at(mh);
1092 }
1093
1094 // ------------------------------------------------------------------
1095 // ciMethod::has_option
1096 //
1097 bool ciMethod::has_option(const char* option) {
1098 check_is_loaded();
1099 VM_ENTRY_MARK;
1100 methodHandle mh(THREAD, get_Method());
1101 return CompilerOracle::has_option_string(mh, option);
1102 }
1103
1104 // ------------------------------------------------------------------
1105 // ciMethod::has_option_value
1106 //
1107 template<typename T>
1108 bool ciMethod::has_option_value(const char* option, T& value) {
1109 check_is_loaded();
1110 VM_ENTRY_MARK;
1111 methodHandle mh(THREAD, get_Method());
1112 return CompilerOracle::has_option_value(mh, option, value);
1113 }
1114 // Explicit instantiation for all OptionTypes supported.
1115 template bool ciMethod::has_option_value<intx>(const char* option, intx& value);
1116 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value);
1117 template bool ciMethod::has_option_value<bool>(const char* option, bool& value);
1118 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value);
1119
1120 // ------------------------------------------------------------------
1121 // ciMethod::can_be_compiled
1122 //
1123 // Have previous compilations of this method succeeded?
1124 bool ciMethod::can_be_compiled() {
1125 check_is_loaded();
1126 ciEnv* env = CURRENT_ENV;
1127 if (is_c1_compile(env->comp_level())) {
1128 return _is_c1_compilable;
1129 }
1130 return _is_c2_compilable;
1131 }
1132
1133 // ------------------------------------------------------------------
1134 // ciMethod::set_not_compilable
1135 //
1136 // Tell the VM that this method cannot be compiled at all.
1137 void ciMethod::set_not_compilable(const char* reason) {
1138 check_is_loaded();
1139 VM_ENTRY_MARK;
1140 ciEnv* env = CURRENT_ENV;
1141 if (is_c1_compile(env->comp_level())) {
1142 _is_c1_compilable = false;
1143 } else {
1144 _is_c2_compilable = false;
1145 }
1146 get_Method()->set_not_compilable(env->comp_level(), true, reason);
1147 }
1148
1149 // ------------------------------------------------------------------
1150 // ciMethod::can_be_osr_compiled
1151 //
1152 // Have previous compilations of this method succeeded?
1153 //
1154 // Implementation note: the VM does not currently keep track
1155 // of failed OSR compilations per bci. The entry_bci parameter
1156 // is currently unused.
1157 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1158 check_is_loaded();
1159 VM_ENTRY_MARK;
1160 ciEnv* env = CURRENT_ENV;
1161 return !get_Method()->is_not_osr_compilable(env->comp_level());
1162 }
1163
1164 // ------------------------------------------------------------------
1165 // ciMethod::has_compiled_code
1166 bool ciMethod::has_compiled_code() {
1167 return instructions_size() > 0;
1168 }
1169
1170 int ciMethod::comp_level() {
1171 check_is_loaded();
1172 VM_ENTRY_MARK;
1173 nmethod* nm = get_Method()->code();
1174 if (nm != NULL) return nm->comp_level();
1175 return 0;
1176 }
1177
1178 int ciMethod::highest_osr_comp_level() {
1179 check_is_loaded();
1180 VM_ENTRY_MARK;
1181 return get_Method()->highest_osr_comp_level();
1182 }
1183
1184 // ------------------------------------------------------------------
1185 // ciMethod::code_size_for_inlining
1186 //
1187 // Code size for inlining decisions. This method returns a code
1188 // size of 1 for methods which has the ForceInline annotation.
1189 int ciMethod::code_size_for_inlining() {
1190 check_is_loaded();
1191 if (get_Method()->force_inline()) {
1192 return 1;
1193 }
1194 return code_size();
1195 }
1196
1197 // ------------------------------------------------------------------
1198 // ciMethod::instructions_size
1199 //
1200 // This is a rough metric for "fat" methods, compared before inlining
1201 // with InlineSmallCode. The CodeBlob::code_size accessor includes
1202 // junk like exception handler, stubs, and constant table, which are
1203 // not highly relevant to an inlined method. So we use the more
1204 // specific accessor nmethod::insts_size.
1205 int ciMethod::instructions_size() {
1206 if (_instructions_size == -1) {
1207 GUARDED_VM_ENTRY(
1208 nmethod* code = get_Method()->code();
1209 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1210 _instructions_size = code->insts_end() - code->verified_entry_point();
1211 } else {
1212 _instructions_size = 0;
1213 }
1214 );
1215 }
1216 return _instructions_size;
1217 }
1218
1219 // ------------------------------------------------------------------
1220 // ciMethod::log_nmethod_identity
1221 void ciMethod::log_nmethod_identity(xmlStream* log) {
1222 GUARDED_VM_ENTRY(
1223 nmethod* code = get_Method()->code();
1224 if (code != NULL) {
1225 code->log_identity(log);
1226 }
1227 )
1228 }
1229
1230 // ------------------------------------------------------------------
1231 // ciMethod::is_not_reached
1232 bool ciMethod::is_not_reached(int bci) {
1233 check_is_loaded();
1234 VM_ENTRY_MARK;
1235 return Interpreter::is_not_reached(
1236 methodHandle(THREAD, get_Method()), bci);
1237 }
1238
1239 // ------------------------------------------------------------------
1240 // ciMethod::was_never_executed
1241 bool ciMethod::was_executed_more_than(int times) {
1242 VM_ENTRY_MARK;
1243 return get_Method()->was_executed_more_than(times);
1244 }
1245
1246 // ------------------------------------------------------------------
1247 // ciMethod::has_unloaded_classes_in_signature
1248 bool ciMethod::has_unloaded_classes_in_signature() {
1249 VM_ENTRY_MARK;
1250 {
1251 EXCEPTION_MARK;
1252 methodHandle m(THREAD, get_Method());
1253 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1254 if( HAS_PENDING_EXCEPTION ) {
1255 CLEAR_PENDING_EXCEPTION;
1256 return true; // Declare that we may have unloaded classes
1257 }
1258 return has_unloaded;
1259 }
1260 }
1261
1262 // ------------------------------------------------------------------
1263 // ciMethod::is_klass_loaded
1264 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1265 VM_ENTRY_MARK;
1266 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1267 }
1268
1269 // ------------------------------------------------------------------
1270 // ciMethod::check_call
1271 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1272 // This method is used only in C2 from InlineTree::ok_to_inline,
1273 // and is only used under -Xcomp or -XX:CompileTheWorld.
1274 // It appears to fail when applied to an invokeinterface call site.
1275 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1276 VM_ENTRY_MARK;
1277 {
1278 EXCEPTION_MARK;
1279 HandleMark hm(THREAD);
1280 constantPoolHandle pool (THREAD, get_Method()->constants());
1281 methodHandle spec_method;
1282 KlassHandle spec_klass;
1283 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1284 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
1285 if (HAS_PENDING_EXCEPTION) {
1286 CLEAR_PENDING_EXCEPTION;
1287 return false;
1288 } else {
1289 return (spec_method->is_static() == is_static);
1290 }
1291 }
1292 return false;
1293 }
1294
1295 // ------------------------------------------------------------------
1296 // ciMethod::profile_aging
1297 //
1298 // Should the method be compiled with an age counter?
1299 bool ciMethod::profile_aging() const {
1300 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1301 !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1302 }
1303 // ------------------------------------------------------------------
1304 // ciMethod::print_codes
1305 //
1306 // Print the bytecodes for this method.
1307 void ciMethod::print_codes_on(outputStream* st) {
1308 check_is_loaded();
1309 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1310 }
1311
1312
1313 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1314 check_is_loaded(); \
1315 VM_ENTRY_MARK; \
1316 return get_Method()->flag_accessor(); \
1317 }
1318
1319 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1320 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1321 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1322 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1323 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1324 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1325
1326 bool ciMethod::is_boxing_method() const {
1327 if (holder()->is_box_klass()) {
1328 switch (intrinsic_id()) {
1329 case vmIntrinsics::_Boolean_valueOf:
1330 case vmIntrinsics::_Byte_valueOf:
1331 case vmIntrinsics::_Character_valueOf:
1332 case vmIntrinsics::_Short_valueOf:
1333 case vmIntrinsics::_Integer_valueOf:
1334 case vmIntrinsics::_Long_valueOf:
1335 case vmIntrinsics::_Float_valueOf:
1336 case vmIntrinsics::_Double_valueOf:
1337 return true;
1338 default:
1339 return false;
1340 }
1341 }
1342 return false;
1343 }
1344
1345 bool ciMethod::is_unboxing_method() const {
1346 if (holder()->is_box_klass()) {
1347 switch (intrinsic_id()) {
1348 case vmIntrinsics::_booleanValue:
1349 case vmIntrinsics::_byteValue:
1350 case vmIntrinsics::_charValue:
1351 case vmIntrinsics::_shortValue:
1352 case vmIntrinsics::_intValue:
1353 case vmIntrinsics::_longValue:
1354 case vmIntrinsics::_floatValue:
1355 case vmIntrinsics::_doubleValue:
1356 return true;
1357 default:
1358 return false;
1359 }
1360 }
1361 return false;
1362 }
1363
1364 BCEscapeAnalyzer *ciMethod::get_bcea() {
1365 #ifdef COMPILER2
1366 if (_bcea == NULL) {
1367 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1368 }
1369 return _bcea;
1370 #else // COMPILER2
1371 ShouldNotReachHere();
1372 return NULL;
1373 #endif // COMPILER2
1374 }
1375
1376 ciMethodBlocks *ciMethod::get_method_blocks() {
1377 Arena *arena = CURRENT_ENV->arena();
1378 if (_method_blocks == NULL) {
1379 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1380 }
1381 return _method_blocks;
1382 }
1383
1384 #undef FETCH_FLAG_FROM_VM
1385
1386 void ciMethod::dump_name_as_ascii(outputStream* st) {
1387 Method* method = get_Method();
1388 st->print("%s %s %s",
1389 method->klass_name()->as_quoted_ascii(),
1390 method->name()->as_quoted_ascii(),
1391 method->signature()->as_quoted_ascii());
1392 }
1393
1394 void ciMethod::dump_replay_data(outputStream* st) {
1395 ResourceMark rm;
1396 Method* method = get_Method();
1397 MethodCounters* mcs = method->method_counters();
1398 st->print("ciMethod ");
1399 dump_name_as_ascii(st);
1400 st->print_cr(" %d %d %d %d %d",
1401 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1402 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1403 interpreter_invocation_count(),
1404 interpreter_throwout_count(),
1405 _instructions_size);
1406 }
1407
1408 // ------------------------------------------------------------------
1409 // ciMethod::print_codes
1410 //
1411 // Print a range of the bytecodes for this method.
1412 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1413 check_is_loaded();
1414 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1415 }
1416
1417 // ------------------------------------------------------------------
1418 // ciMethod::print_name
1419 //
1420 // Print the name of this method, including signature and some flags.
1421 void ciMethod::print_name(outputStream* st) {
1422 check_is_loaded();
1423 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1424 }
1425
1426 // ------------------------------------------------------------------
1427 // ciMethod::print_short_name
1428 //
1429 // Print the name of this method, without signature.
1430 void ciMethod::print_short_name(outputStream* st) {
1431 if (is_loaded()) {
1432 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1433 } else {
1434 // Fall back if method is not loaded.
1435 holder()->print_name_on(st);
1436 st->print("::");
1437 name()->print_symbol_on(st);
1438 if (WizardMode)
1439 signature()->as_symbol()->print_symbol_on(st);
1440 }
1441 }
1442
1443 // ------------------------------------------------------------------
1444 // ciMethod::print_impl
1445 //
1446 // Implementation of the print method.
1447 void ciMethod::print_impl(outputStream* st) {
1448 ciMetadata::print_impl(st);
1449 st->print(" name=");
1450 name()->print_symbol_on(st);
1451 st->print(" holder=");
1452 holder()->print_name_on(st);
1453 st->print(" signature=");
1454 signature()->as_symbol()->print_symbol_on(st);
1455 if (is_loaded()) {
1456 st->print(" loaded=true");
1457 st->print(" arg_size=%d", arg_size());
1458 st->print(" flags=");
1459 flags().print_member_flags(st);
1460 } else {
1461 st->print(" loaded=false");
1462 }
1463 }