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