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