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--- old/src/share/vm/ci/ciMethod.cpp
+++ new/src/share/vm/ci/ciMethod.cpp
1 1 /*
2 - * Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
2 + * Copyright 1999-2010 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 #include "incls/_precompiled.incl"
26 26 #include "incls/_ciMethod.cpp.incl"
27 27
28 28 // ciMethod
29 29 //
30 30 // This class represents a methodOop in the HotSpot virtual
31 31 // machine.
32 32
33 33
34 34 // ------------------------------------------------------------------
35 35 // ciMethod::ciMethod
36 36 //
37 37 // Loaded method.
38 38 ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) {
39 39 assert(h_m() != NULL, "no null method");
40 40
41 41 // These fields are always filled in in loaded methods.
42 42 _flags = ciFlags(h_m()->access_flags());
43 43
44 44 // Easy to compute, so fill them in now.
45 45 _max_stack = h_m()->max_stack();
46 46 _max_locals = h_m()->max_locals();
47 47 _code_size = h_m()->code_size();
48 48 _intrinsic_id = h_m()->intrinsic_id();
49 49 _handler_count = h_m()->exception_table()->length() / 4;
50 50 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
51 51 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
52 52 _is_compilable = !h_m()->is_not_compilable();
53 53 // Lazy fields, filled in on demand. Require allocation.
54 54 _code = NULL;
55 55 _exception_handlers = NULL;
56 56 _liveness = NULL;
57 57 _bcea = NULL;
58 58 _method_blocks = NULL;
59 59 #ifdef COMPILER2
60 60 _flow = NULL;
61 61 #endif // COMPILER2
62 62
63 63 ciEnv *env = CURRENT_ENV;
64 64 if (env->jvmti_can_hotswap_or_post_breakpoint() && _is_compilable) {
65 65 // 6328518 check hotswap conditions under the right lock.
66 66 MutexLocker locker(Compile_lock);
67 67 if (Dependencies::check_evol_method(h_m()) != NULL) {
68 68 _is_compilable = false;
69 69 }
70 70 } else {
71 71 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
72 72 }
73 73
74 74 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) {
75 75 _can_be_statically_bound = h_m()->can_be_statically_bound();
76 76 } else {
77 77 // Have to use a conservative value in this case.
78 78 _can_be_statically_bound = false;
79 79 }
80 80
81 81 // Adjust the definition of this condition to be more useful:
82 82 // %%% take these conditions into account in vtable generation
83 83 if (!_can_be_statically_bound && h_m()->is_private())
84 84 _can_be_statically_bound = true;
85 85 if (_can_be_statically_bound && h_m()->is_abstract())
86 86 _can_be_statically_bound = false;
87 87
88 88 // generating _signature may allow GC and therefore move m.
89 89 // These fields are always filled in.
90 90 _name = env->get_object(h_m()->name())->as_symbol();
91 91 _holder = env->get_object(h_m()->method_holder())->as_instance_klass();
92 92 ciSymbol* sig_symbol = env->get_object(h_m()->signature())->as_symbol();
93 93 _signature = new (env->arena()) ciSignature(_holder, sig_symbol);
94 94 _method_data = NULL;
95 95 // Take a snapshot of these values, so they will be commensurate with the MDO.
96 96 if (ProfileInterpreter) {
97 97 int invcnt = h_m()->interpreter_invocation_count();
98 98 // if the value overflowed report it as max int
99 99 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
100 100 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
101 101 } else {
102 102 _interpreter_invocation_count = 0;
103 103 _interpreter_throwout_count = 0;
104 104 }
105 105 if (_interpreter_invocation_count == 0)
106 106 _interpreter_invocation_count = 1;
107 107 }
108 108
109 109
110 110 // ------------------------------------------------------------------
111 111 // ciMethod::ciMethod
112 112 //
113 113 // Unloaded method.
114 114 ciMethod::ciMethod(ciInstanceKlass* holder,
115 115 ciSymbol* name,
116 116 ciSymbol* signature) : ciObject(ciMethodKlass::make()) {
117 117 // These fields are always filled in.
118 118 _name = name;
119 119 _holder = holder;
120 120 _signature = new (CURRENT_ENV->arena()) ciSignature(_holder, signature);
121 121 _intrinsic_id = vmIntrinsics::_none;
122 122 _liveness = NULL;
123 123 _can_be_statically_bound = false;
124 124 _bcea = NULL;
125 125 _method_blocks = NULL;
126 126 _method_data = NULL;
127 127 #ifdef COMPILER2
128 128 _flow = NULL;
129 129 #endif // COMPILER2
130 130 }
131 131
132 132
133 133 // ------------------------------------------------------------------
134 134 // ciMethod::load_code
135 135 //
136 136 // Load the bytecodes and exception handler table for this method.
137 137 void ciMethod::load_code() {
138 138 VM_ENTRY_MARK;
139 139 assert(is_loaded(), "only loaded methods have code");
140 140
141 141 methodOop me = get_methodOop();
142 142 Arena* arena = CURRENT_THREAD_ENV->arena();
143 143
144 144 // Load the bytecodes.
145 145 _code = (address)arena->Amalloc(code_size());
146 146 memcpy(_code, me->code_base(), code_size());
147 147
148 148 // Revert any breakpoint bytecodes in ci's copy
149 149 if (me->number_of_breakpoints() > 0) {
150 150 BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints();
151 151 for (; bp != NULL; bp = bp->next()) {
152 152 if (bp->match(me)) {
153 153 code_at_put(bp->bci(), bp->orig_bytecode());
154 154 }
155 155 }
156 156 }
157 157
158 158 // And load the exception table.
159 159 typeArrayOop exc_table = me->exception_table();
160 160
161 161 // Allocate one extra spot in our list of exceptions. This
162 162 // last entry will be used to represent the possibility that
163 163 // an exception escapes the method. See ciExceptionHandlerStream
164 164 // for details.
165 165 _exception_handlers =
166 166 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
167 167 * (_handler_count + 1));
168 168 if (_handler_count > 0) {
169 169 for (int i=0; i<_handler_count; i++) {
170 170 int base = i*4;
171 171 _exception_handlers[i] = new (arena) ciExceptionHandler(
172 172 holder(),
173 173 /* start */ exc_table->int_at(base),
174 174 /* limit */ exc_table->int_at(base+1),
175 175 /* goto pc */ exc_table->int_at(base+2),
176 176 /* cp index */ exc_table->int_at(base+3));
177 177 }
178 178 }
179 179
180 180 // Put an entry at the end of our list to represent the possibility
181 181 // of exceptional exit.
182 182 _exception_handlers[_handler_count] =
183 183 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
184 184
185 185 if (CIPrintMethodCodes) {
186 186 print_codes();
187 187 }
188 188 }
189 189
190 190
191 191 // ------------------------------------------------------------------
192 192 // ciMethod::has_linenumber_table
193 193 //
194 194 // length unknown until decompression
195 195 bool ciMethod::has_linenumber_table() const {
196 196 check_is_loaded();
197 197 VM_ENTRY_MARK;
198 198 return get_methodOop()->has_linenumber_table();
199 199 }
200 200
201 201
202 202 // ------------------------------------------------------------------
203 203 // ciMethod::compressed_linenumber_table
204 204 u_char* ciMethod::compressed_linenumber_table() const {
205 205 check_is_loaded();
206 206 VM_ENTRY_MARK;
207 207 return get_methodOop()->compressed_linenumber_table();
208 208 }
209 209
210 210
211 211 // ------------------------------------------------------------------
212 212 // ciMethod::line_number_from_bci
213 213 int ciMethod::line_number_from_bci(int bci) const {
214 214 check_is_loaded();
215 215 VM_ENTRY_MARK;
216 216 return get_methodOop()->line_number_from_bci(bci);
217 217 }
218 218
219 219
220 220 // ------------------------------------------------------------------
221 221 // ciMethod::vtable_index
222 222 //
223 223 // Get the position of this method's entry in the vtable, if any.
224 224 int ciMethod::vtable_index() {
225 225 check_is_loaded();
226 226 assert(holder()->is_linked(), "must be linked");
227 227 VM_ENTRY_MARK;
228 228 return get_methodOop()->vtable_index();
229 229 }
230 230
231 231
232 232 // ------------------------------------------------------------------
233 233 // ciMethod::native_entry
234 234 //
235 235 // Get the address of this method's native code, if any.
236 236 address ciMethod::native_entry() {
237 237 check_is_loaded();
238 238 assert(flags().is_native(), "must be native method");
239 239 VM_ENTRY_MARK;
240 240 methodOop method = get_methodOop();
241 241 address entry = method->native_function();
242 242 assert(entry != NULL, "must be valid entry point");
243 243 return entry;
244 244 }
245 245
246 246
247 247 // ------------------------------------------------------------------
248 248 // ciMethod::interpreter_entry
249 249 //
250 250 // Get the entry point for running this method in the interpreter.
251 251 address ciMethod::interpreter_entry() {
252 252 check_is_loaded();
253 253 VM_ENTRY_MARK;
254 254 methodHandle mh(THREAD, get_methodOop());
255 255 return Interpreter::entry_for_method(mh);
256 256 }
257 257
258 258
259 259 // ------------------------------------------------------------------
260 260 // ciMethod::uses_balanced_monitors
261 261 //
262 262 // Does this method use monitors in a strict stack-disciplined manner?
263 263 bool ciMethod::has_balanced_monitors() {
264 264 check_is_loaded();
265 265 if (_balanced_monitors) return true;
266 266
267 267 // Analyze the method to see if monitors are used properly.
268 268 VM_ENTRY_MARK;
269 269 methodHandle method(THREAD, get_methodOop());
270 270 assert(method->has_monitor_bytecodes(), "should have checked this");
271 271
272 272 // Check to see if a previous compilation computed the
273 273 // monitor-matching analysis.
274 274 if (method->guaranteed_monitor_matching()) {
275 275 _balanced_monitors = true;
276 276 return true;
277 277 }
278 278
279 279 {
280 280 EXCEPTION_MARK;
281 281 ResourceMark rm(THREAD);
282 282 GeneratePairingInfo gpi(method);
283 283 gpi.compute_map(CATCH);
284 284 if (!gpi.monitor_safe()) {
285 285 return false;
286 286 }
287 287 method->set_guaranteed_monitor_matching();
288 288 _balanced_monitors = true;
289 289 }
290 290 return true;
291 291 }
292 292
293 293
294 294 // ------------------------------------------------------------------
295 295 // ciMethod::get_flow_analysis
296 296 ciTypeFlow* ciMethod::get_flow_analysis() {
297 297 #ifdef COMPILER2
298 298 if (_flow == NULL) {
299 299 ciEnv* env = CURRENT_ENV;
300 300 _flow = new (env->arena()) ciTypeFlow(env, this);
301 301 _flow->do_flow();
302 302 }
303 303 return _flow;
304 304 #else // COMPILER2
305 305 ShouldNotReachHere();
306 306 return NULL;
307 307 #endif // COMPILER2
308 308 }
309 309
310 310
311 311 // ------------------------------------------------------------------
312 312 // ciMethod::get_osr_flow_analysis
313 313 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
314 314 #ifdef COMPILER2
315 315 // OSR entry points are always place after a call bytecode of some sort
316 316 assert(osr_bci >= 0, "must supply valid OSR entry point");
317 317 ciEnv* env = CURRENT_ENV;
318 318 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
319 319 flow->do_flow();
320 320 return flow;
321 321 #else // COMPILER2
322 322 ShouldNotReachHere();
323 323 return NULL;
324 324 #endif // COMPILER2
325 325 }
326 326
327 327 // ------------------------------------------------------------------
328 328 // ciMethod::raw_liveness_at_bci
329 329 //
330 330 // Which local variables are live at a specific bci?
331 331 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
332 332 check_is_loaded();
333 333 if (_liveness == NULL) {
334 334 // Create the liveness analyzer.
335 335 Arena* arena = CURRENT_ENV->arena();
336 336 _liveness = new (arena) MethodLiveness(arena, this);
337 337 _liveness->compute_liveness();
338 338 }
339 339 return _liveness->get_liveness_at(bci);
340 340 }
341 341
342 342 // ------------------------------------------------------------------
343 343 // ciMethod::liveness_at_bci
344 344 //
345 345 // Which local variables are live at a specific bci? When debugging
346 346 // will return true for all locals in some cases to improve debug
347 347 // information.
348 348 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
349 349 MethodLivenessResult result = raw_liveness_at_bci(bci);
350 350 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
351 351 // Keep all locals live for the user's edification and amusement.
352 352 result.at_put_range(0, result.size(), true);
353 353 }
354 354 return result;
355 355 }
356 356
357 357 // ciMethod::live_local_oops_at_bci
358 358 //
359 359 // find all the live oops in the locals array for a particular bci
360 360 // Compute what the interpreter believes by using the interpreter
361 361 // oopmap generator. This is used as a double check during osr to
362 362 // guard against conservative result from MethodLiveness making us
363 363 // think a dead oop is live. MethodLiveness is conservative in the
364 364 // sense that it may consider locals to be live which cannot be live,
365 365 // like in the case where a local could contain an oop or a primitive
366 366 // along different paths. In that case the local must be dead when
367 367 // those paths merge. Since the interpreter's viewpoint is used when
368 368 // gc'ing an interpreter frame we need to use its viewpoint during
369 369 // OSR when loading the locals.
370 370
371 371 BitMap ciMethod::live_local_oops_at_bci(int bci) {
372 372 VM_ENTRY_MARK;
373 373 InterpreterOopMap mask;
374 374 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask);
375 375 int mask_size = max_locals();
376 376 BitMap result(mask_size);
377 377 result.clear();
378 378 int i;
379 379 for (i = 0; i < mask_size ; i++ ) {
380 380 if (mask.is_oop(i)) result.set_bit(i);
381 381 }
382 382 return result;
383 383 }
384 384
385 385
386 386 #ifdef COMPILER1
387 387 // ------------------------------------------------------------------
388 388 // ciMethod::bci_block_start
389 389 //
390 390 // Marks all bcis where a new basic block starts
391 391 const BitMap ciMethod::bci_block_start() {
392 392 check_is_loaded();
393 393 if (_liveness == NULL) {
394 394 // Create the liveness analyzer.
395 395 Arena* arena = CURRENT_ENV->arena();
396 396 _liveness = new (arena) MethodLiveness(arena, this);
397 397 _liveness->compute_liveness();
398 398 }
399 399
400 400 return _liveness->get_bci_block_start();
401 401 }
402 402 #endif // COMPILER1
403 403
404 404
405 405 // ------------------------------------------------------------------
406 406 // ciMethod::call_profile_at_bci
407 407 //
408 408 // Get the ciCallProfile for the invocation of this method.
409 409 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
410 410 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
411 411 ResourceMark rm;
412 412 ciCallProfile result;
413 413 if (method_data() != NULL && method_data()->is_mature()) {
414 414 ciProfileData* data = method_data()->bci_to_data(bci);
415 415 if (data != NULL && data->is_CounterData()) {
416 416 // Every profiled call site has a counter.
417 417 int count = data->as_CounterData()->count();
418 418
419 419 if (!data->is_ReceiverTypeData()) {
420 420 result._receiver_count[0] = 0; // that's a definite zero
421 421 } else { // ReceiverTypeData is a subclass of CounterData
422 422 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
423 423 // In addition, virtual call sites have receiver type information
424 424 int receivers_count_total = 0;
425 425 int morphism = 0;
426 426 for (uint i = 0; i < call->row_limit(); i++) {
427 427 ciKlass* receiver = call->receiver(i);
428 428 if (receiver == NULL) continue;
429 429 morphism += 1;
430 430 int rcount = call->receiver_count(i);
431 431 if (rcount == 0) rcount = 1; // Should be valid value
432 432 receivers_count_total += rcount;
433 433 // Add the receiver to result data.
434 434 result.add_receiver(receiver, rcount);
435 435 // If we extend profiling to record methods,
436 436 // we will set result._method also.
437 437 }
438 438 // Determine call site's morphism.
439 439 // The call site count could be == (receivers_count_total + 1)
440 440 // not only in the case of a polymorphic call but also in the case
441 441 // when a method data snapshot is taken after the site count was updated
442 442 // but before receivers counters were updated.
443 443 if (morphism == result._limit) {
444 444 // There were no array klasses and morphism <= MorphismLimit.
445 445 if (morphism < ciCallProfile::MorphismLimit ||
446 446 morphism == ciCallProfile::MorphismLimit &&
447 447 (receivers_count_total+1) >= count) {
448 448 result._morphism = morphism;
449 449 }
450 450 }
451 451 // Make the count consistent if this is a call profile. If count is
452 452 // zero or less, presume that this is a typecheck profile and
453 453 // do nothing. Otherwise, increase count to be the sum of all
454 454 // receiver's counts.
455 455 if (count > 0) {
456 456 if (count < receivers_count_total) {
457 457 count = receivers_count_total;
458 458 }
459 459 }
460 460 }
461 461 result._count = count;
462 462 }
463 463 }
464 464 return result;
465 465 }
466 466
467 467 // ------------------------------------------------------------------
468 468 // Add new receiver and sort data by receiver's profile count.
469 469 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
470 470 // Add new receiver and sort data by receiver's counts when we have space
471 471 // for it otherwise replace the less called receiver (less called receiver
472 472 // is placed to the last array element which is not used).
473 473 // First array's element contains most called receiver.
474 474 int i = _limit;
475 475 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
476 476 _receiver[i] = _receiver[i-1];
477 477 _receiver_count[i] = _receiver_count[i-1];
478 478 }
479 479 _receiver[i] = receiver;
480 480 _receiver_count[i] = receiver_count;
481 481 if (_limit < MorphismLimit) _limit++;
482 482 }
483 483
484 484 // ------------------------------------------------------------------
485 485 // ciMethod::find_monomorphic_target
486 486 //
487 487 // Given a certain calling environment, find the monomorphic target
488 488 // for the call. Return NULL if the call is not monomorphic in
489 489 // its calling environment, or if there are only abstract methods.
490 490 // The returned method is never abstract.
491 491 // Note: If caller uses a non-null result, it must inform dependencies
492 492 // via assert_unique_concrete_method or assert_leaf_type.
493 493 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
494 494 ciInstanceKlass* callee_holder,
495 495 ciInstanceKlass* actual_recv) {
496 496 check_is_loaded();
497 497
498 498 if (actual_recv->is_interface()) {
499 499 // %%% We cannot trust interface types, yet. See bug 6312651.
500 500 return NULL;
501 501 }
502 502
503 503 ciMethod* root_m = resolve_invoke(caller, actual_recv);
504 504 if (root_m == NULL) {
505 505 // Something went wrong looking up the actual receiver method.
506 506 return NULL;
507 507 }
508 508 assert(!root_m->is_abstract(), "resolve_invoke promise");
509 509
510 510 // Make certain quick checks even if UseCHA is false.
511 511
512 512 // Is it private or final?
513 513 if (root_m->can_be_statically_bound()) {
514 514 return root_m;
515 515 }
516 516
517 517 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
518 518 // Easy case. There is no other place to put a method, so don't bother
519 519 // to go through the VM_ENTRY_MARK and all the rest.
520 520 return root_m;
521 521 }
522 522
523 523 // Array methods (clone, hashCode, etc.) are always statically bound.
524 524 // If we were to see an array type here, we'd return root_m.
525 525 // However, this method processes only ciInstanceKlasses. (See 4962591.)
526 526 // The inline_native_clone intrinsic narrows Object to T[] properly,
527 527 // so there is no need to do the same job here.
528 528
529 529 if (!UseCHA) return NULL;
530 530
531 531 VM_ENTRY_MARK;
532 532
533 533 methodHandle target;
534 534 {
535 535 MutexLocker locker(Compile_lock);
536 536 klassOop context = actual_recv->get_klassOop();
537 537 target = Dependencies::find_unique_concrete_method(context,
538 538 root_m->get_methodOop());
539 539 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
540 540 }
541 541
542 542 #ifndef PRODUCT
543 543 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) {
544 544 tty->print("found a non-root unique target method");
545 545 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name());
546 546 tty->print(" method = ");
547 547 target->print_short_name(tty);
548 548 tty->cr();
549 549 }
550 550 #endif //PRODUCT
551 551
552 552 if (target() == NULL) {
553 553 return NULL;
554 554 }
555 555 if (target() == root_m->get_methodOop()) {
556 556 return root_m;
557 557 }
558 558 if (!root_m->is_public() &&
559 559 !root_m->is_protected()) {
560 560 // If we are going to reason about inheritance, it's easiest
561 561 // if the method in question is public, protected, or private.
562 562 // If the answer is not root_m, it is conservatively correct
563 563 // to return NULL, even if the CHA encountered irrelevant
564 564 // methods in other packages.
565 565 // %%% TO DO: Work out logic for package-private methods
566 566 // with the same name but different vtable indexes.
567 567 return NULL;
568 568 }
569 569 return CURRENT_THREAD_ENV->get_object(target())->as_method();
570 570 }
571 571
572 572 // ------------------------------------------------------------------
573 573 // ciMethod::resolve_invoke
574 574 //
575 575 // Given a known receiver klass, find the target for the call.
576 576 // Return NULL if the call has no target or the target is abstract.
577 577 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
578 578 check_is_loaded();
579 579 VM_ENTRY_MARK;
580 580
581 581 KlassHandle caller_klass (THREAD, caller->get_klassOop());
582 582 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop());
583 583 KlassHandle h_resolved (THREAD, holder()->get_klassOop());
584 584 symbolHandle h_name (THREAD, name()->get_symbolOop());
585 585 symbolHandle h_signature (THREAD, signature()->get_symbolOop());
586 586
587 587 methodHandle m;
588 588 // Only do exact lookup if receiver klass has been linked. Otherwise,
589 589 // the vtable has not been setup, and the LinkResolver will fail.
590 590 if (h_recv->oop_is_javaArray()
591 591 ||
592 592 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
593 593 if (holder()->is_interface()) {
594 594 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
595 595 } else {
596 596 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
597 597 }
598 598 }
599 599
600 600 if (m.is_null()) {
601 601 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
602 602 return NULL;
603 603 }
604 604
605 605 ciMethod* result = this;
606 606 if (m() != get_methodOop()) {
607 607 result = CURRENT_THREAD_ENV->get_object(m())->as_method();
608 608 }
609 609
610 610 // Don't return abstract methods because they aren't
611 611 // optimizable or interesting.
612 612 if (result->is_abstract()) {
613 613 return NULL;
614 614 } else {
615 615 return result;
616 616 }
617 617 }
618 618
619 619 // ------------------------------------------------------------------
620 620 // ciMethod::resolve_vtable_index
621 621 //
622 622 // Given a known receiver klass, find the vtable index for the call.
623 623 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown.
624 624 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
625 625 check_is_loaded();
626 626
627 627 int vtable_index = methodOopDesc::invalid_vtable_index;
628 628 // Only do lookup if receiver klass has been linked. Otherwise,
629 629 // the vtable has not been setup, and the LinkResolver will fail.
630 630 if (!receiver->is_interface()
631 631 && (!receiver->is_instance_klass() ||
632 632 receiver->as_instance_klass()->is_linked())) {
633 633 VM_ENTRY_MARK;
634 634
635 635 KlassHandle caller_klass (THREAD, caller->get_klassOop());
636 636 KlassHandle h_recv (THREAD, receiver->get_klassOop());
637 637 symbolHandle h_name (THREAD, name()->get_symbolOop());
638 638 symbolHandle h_signature (THREAD, signature()->get_symbolOop());
639 639
640 640 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
641 641 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
642 642 // A statically bound method. Return "no such index".
643 643 vtable_index = methodOopDesc::invalid_vtable_index;
644 644 }
645 645 }
646 646
647 647 return vtable_index;
648 648 }
649 649
650 650 // ------------------------------------------------------------------
651 651 // ciMethod::interpreter_call_site_count
652 652 int ciMethod::interpreter_call_site_count(int bci) {
653 653 if (method_data() != NULL) {
654 654 ResourceMark rm;
655 655 ciProfileData* data = method_data()->bci_to_data(bci);
656 656 if (data != NULL && data->is_CounterData()) {
657 657 return scale_count(data->as_CounterData()->count());
658 658 }
659 659 }
660 660 return -1; // unknown
661 661 }
662 662
663 663 // ------------------------------------------------------------------
664 664 // Adjust a CounterData count to be commensurate with
665 665 // interpreter_invocation_count. If the MDO exists for
666 666 // only 25% of the time the method exists, then the
667 667 // counts in the MDO should be scaled by 4X, so that
668 668 // they can be usefully and stably compared against the
669 669 // invocation counts in methods.
670 670 int ciMethod::scale_count(int count, float prof_factor) {
671 671 if (count > 0 && method_data() != NULL) {
672 672 int current_mileage = method_data()->current_mileage();
673 673 int creation_mileage = method_data()->creation_mileage();
674 674 int counter_life = current_mileage - creation_mileage;
675 675 int method_life = interpreter_invocation_count();
676 676 // counter_life due to backedge_counter could be > method_life
677 677 if (counter_life > method_life)
678 678 counter_life = method_life;
679 679 if (0 < counter_life && counter_life <= method_life) {
680 680 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
681 681 count = (count > 0) ? count : 1;
682 682 }
683 683 }
684 684 return count;
685 685 }
686 686
687 687 // ------------------------------------------------------------------
688 688 // invokedynamic support
689 689 //
690 690 bool ciMethod::is_method_handle_invoke() const {
691 691 check_is_loaded();
692 692 bool flag = ((flags().as_int() & JVM_MH_INVOKE_BITS) == JVM_MH_INVOKE_BITS);
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693 693 #ifdef ASSERT
694 694 {
695 695 VM_ENTRY_MARK;
696 696 bool flag2 = get_methodOop()->is_method_handle_invoke();
697 697 assert(flag == flag2, "consistent");
698 698 }
699 699 #endif //ASSERT
700 700 return flag;
701 701 }
702 702
703 +bool ciMethod::is_method_handle_adapter() const {
704 + check_is_loaded();
705 + VM_ENTRY_MARK;
706 + return get_methodOop()->is_method_handle_adapter();
707 +}
708 +
703 709 ciInstance* ciMethod::method_handle_type() {
704 710 check_is_loaded();
705 711 VM_ENTRY_MARK;
706 712 oop mtype = get_methodOop()->method_handle_type();
707 713 return CURRENT_THREAD_ENV->get_object(mtype)->as_instance();
708 714 }
709 715
710 716
711 717 // ------------------------------------------------------------------
712 718 // ciMethod::build_method_data
713 719 //
714 720 // Generate new methodDataOop objects at compile time.
715 721 void ciMethod::build_method_data(methodHandle h_m) {
716 722 EXCEPTION_CONTEXT;
717 723 if (is_native() || is_abstract() || h_m()->is_accessor()) return;
718 724 if (h_m()->method_data() == NULL) {
719 725 methodOopDesc::build_interpreter_method_data(h_m, THREAD);
720 726 if (HAS_PENDING_EXCEPTION) {
721 727 CLEAR_PENDING_EXCEPTION;
722 728 }
723 729 }
724 730 if (h_m()->method_data() != NULL) {
725 731 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
726 732 _method_data->load_data();
727 733 } else {
728 734 _method_data = CURRENT_ENV->get_empty_methodData();
729 735 }
730 736 }
731 737
732 738 // public, retroactive version
733 739 void ciMethod::build_method_data() {
734 740 if (_method_data == NULL || _method_data->is_empty()) {
735 741 GUARDED_VM_ENTRY({
736 742 build_method_data(get_methodOop());
737 743 });
738 744 }
739 745 }
740 746
741 747
742 748 // ------------------------------------------------------------------
743 749 // ciMethod::method_data
744 750 //
745 751 ciMethodData* ciMethod::method_data() {
746 752 if (_method_data != NULL) {
747 753 return _method_data;
748 754 }
749 755 VM_ENTRY_MARK;
750 756 ciEnv* env = CURRENT_ENV;
751 757 Thread* my_thread = JavaThread::current();
752 758 methodHandle h_m(my_thread, get_methodOop());
753 759
754 760 if (Tier1UpdateMethodData && is_tier1_compile(env->comp_level())) {
755 761 build_method_data(h_m);
756 762 }
757 763
758 764 if (h_m()->method_data() != NULL) {
759 765 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
760 766 _method_data->load_data();
761 767 } else {
762 768 _method_data = CURRENT_ENV->get_empty_methodData();
763 769 }
764 770 return _method_data;
765 771
766 772 }
767 773
768 774
769 775 // ------------------------------------------------------------------
770 776 // ciMethod::will_link
771 777 //
772 778 // Will this method link in a specific calling context?
773 779 bool ciMethod::will_link(ciKlass* accessing_klass,
774 780 ciKlass* declared_method_holder,
775 781 Bytecodes::Code bc) {
776 782 if (!is_loaded()) {
777 783 // Method lookup failed.
778 784 return false;
779 785 }
780 786
781 787 // The link checks have been front-loaded into the get_method
782 788 // call. This method (ciMethod::will_link()) will be removed
783 789 // in the future.
784 790
785 791 return true;
786 792 }
787 793
788 794 // ------------------------------------------------------------------
789 795 // ciMethod::should_exclude
790 796 //
791 797 // Should this method be excluded from compilation?
792 798 bool ciMethod::should_exclude() {
793 799 check_is_loaded();
794 800 VM_ENTRY_MARK;
795 801 methodHandle mh(THREAD, get_methodOop());
796 802 bool ignore;
797 803 return CompilerOracle::should_exclude(mh, ignore);
798 804 }
799 805
800 806 // ------------------------------------------------------------------
801 807 // ciMethod::should_inline
802 808 //
803 809 // Should this method be inlined during compilation?
804 810 bool ciMethod::should_inline() {
805 811 check_is_loaded();
806 812 VM_ENTRY_MARK;
807 813 methodHandle mh(THREAD, get_methodOop());
808 814 return CompilerOracle::should_inline(mh);
809 815 }
810 816
811 817 // ------------------------------------------------------------------
812 818 // ciMethod::should_not_inline
813 819 //
814 820 // Should this method be disallowed from inlining during compilation?
815 821 bool ciMethod::should_not_inline() {
816 822 check_is_loaded();
817 823 VM_ENTRY_MARK;
818 824 methodHandle mh(THREAD, get_methodOop());
819 825 return CompilerOracle::should_not_inline(mh);
820 826 }
821 827
822 828 // ------------------------------------------------------------------
823 829 // ciMethod::should_print_assembly
824 830 //
825 831 // Should the compiler print the generated code for this method?
826 832 bool ciMethod::should_print_assembly() {
827 833 check_is_loaded();
828 834 VM_ENTRY_MARK;
829 835 methodHandle mh(THREAD, get_methodOop());
830 836 return CompilerOracle::should_print(mh);
831 837 }
832 838
833 839 // ------------------------------------------------------------------
834 840 // ciMethod::break_at_execute
835 841 //
836 842 // Should the compiler insert a breakpoint into the generated code
837 843 // method?
838 844 bool ciMethod::break_at_execute() {
839 845 check_is_loaded();
840 846 VM_ENTRY_MARK;
841 847 methodHandle mh(THREAD, get_methodOop());
842 848 return CompilerOracle::should_break_at(mh);
843 849 }
844 850
845 851 // ------------------------------------------------------------------
846 852 // ciMethod::has_option
847 853 //
848 854 bool ciMethod::has_option(const char* option) {
849 855 check_is_loaded();
850 856 VM_ENTRY_MARK;
851 857 methodHandle mh(THREAD, get_methodOop());
852 858 return CompilerOracle::has_option_string(mh, option);
853 859 }
854 860
855 861 // ------------------------------------------------------------------
856 862 // ciMethod::can_be_compiled
857 863 //
858 864 // Have previous compilations of this method succeeded?
859 865 bool ciMethod::can_be_compiled() {
860 866 check_is_loaded();
861 867 return _is_compilable;
862 868 }
863 869
864 870 // ------------------------------------------------------------------
865 871 // ciMethod::set_not_compilable
866 872 //
867 873 // Tell the VM that this method cannot be compiled at all.
868 874 void ciMethod::set_not_compilable() {
869 875 check_is_loaded();
870 876 VM_ENTRY_MARK;
871 877 _is_compilable = false;
872 878 get_methodOop()->set_not_compilable();
873 879 }
874 880
875 881 // ------------------------------------------------------------------
876 882 // ciMethod::can_be_osr_compiled
877 883 //
878 884 // Have previous compilations of this method succeeded?
879 885 //
880 886 // Implementation note: the VM does not currently keep track
881 887 // of failed OSR compilations per bci. The entry_bci parameter
882 888 // is currently unused.
883 889 bool ciMethod::can_be_osr_compiled(int entry_bci) {
884 890 check_is_loaded();
885 891 VM_ENTRY_MARK;
886 892 return !get_methodOop()->access_flags().is_not_osr_compilable();
887 893 }
888 894
889 895 // ------------------------------------------------------------------
890 896 // ciMethod::has_compiled_code
891 897 bool ciMethod::has_compiled_code() {
892 898 VM_ENTRY_MARK;
893 899 return get_methodOop()->code() != NULL;
894 900 }
895 901
896 902 // ------------------------------------------------------------------
897 903 // ciMethod::instructions_size
898 904 // This is a rough metric for "fat" methods, compared
899 905 // before inlining with InlineSmallCode.
900 906 // The CodeBlob::instructions_size accessor includes
901 907 // junk like exception handler, stubs, and constant table,
902 908 // which are not highly relevant to an inlined method.
903 909 // So we use the more specific accessor nmethod::code_size.
904 910 int ciMethod::instructions_size() {
905 911 GUARDED_VM_ENTRY(
906 912 nmethod* code = get_methodOop()->code();
907 913 // if there's no compiled code or the code was produced by the
908 914 // tier1 profiler return 0 for the code size. This should
909 915 // probably be based on the compilation level of the nmethod but
910 916 // that currently isn't properly recorded.
911 917 if (code == NULL ||
912 918 (TieredCompilation && code->compiler() != NULL && code->compiler()->is_c1())) {
913 919 return 0;
914 920 }
915 921 return code->code_end() - code->verified_entry_point();
916 922 )
917 923 }
918 924
919 925 // ------------------------------------------------------------------
920 926 // ciMethod::log_nmethod_identity
921 927 void ciMethod::log_nmethod_identity(xmlStream* log) {
922 928 GUARDED_VM_ENTRY(
923 929 nmethod* code = get_methodOop()->code();
924 930 if (code != NULL) {
925 931 code->log_identity(log);
926 932 }
927 933 )
928 934 }
929 935
930 936 // ------------------------------------------------------------------
931 937 // ciMethod::is_not_reached
932 938 bool ciMethod::is_not_reached(int bci) {
933 939 check_is_loaded();
934 940 VM_ENTRY_MARK;
935 941 return Interpreter::is_not_reached(
936 942 methodHandle(THREAD, get_methodOop()), bci);
937 943 }
938 944
939 945 // ------------------------------------------------------------------
940 946 // ciMethod::was_never_executed
941 947 bool ciMethod::was_executed_more_than(int times) {
942 948 VM_ENTRY_MARK;
943 949 return get_methodOop()->was_executed_more_than(times);
944 950 }
945 951
946 952 // ------------------------------------------------------------------
947 953 // ciMethod::has_unloaded_classes_in_signature
948 954 bool ciMethod::has_unloaded_classes_in_signature() {
949 955 VM_ENTRY_MARK;
950 956 {
951 957 EXCEPTION_MARK;
952 958 methodHandle m(THREAD, get_methodOop());
953 959 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
954 960 if( HAS_PENDING_EXCEPTION ) {
955 961 CLEAR_PENDING_EXCEPTION;
956 962 return true; // Declare that we may have unloaded classes
957 963 }
958 964 return has_unloaded;
959 965 }
960 966 }
961 967
962 968 // ------------------------------------------------------------------
963 969 // ciMethod::is_klass_loaded
964 970 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
965 971 VM_ENTRY_MARK;
966 972 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved);
967 973 }
968 974
969 975 // ------------------------------------------------------------------
970 976 // ciMethod::check_call
971 977 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
972 978 VM_ENTRY_MARK;
973 979 {
974 980 EXCEPTION_MARK;
975 981 HandleMark hm(THREAD);
976 982 constantPoolHandle pool (THREAD, get_methodOop()->constants());
977 983 methodHandle spec_method;
978 984 KlassHandle spec_klass;
979 985 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD);
980 986 if (HAS_PENDING_EXCEPTION) {
981 987 CLEAR_PENDING_EXCEPTION;
982 988 return false;
983 989 } else {
984 990 return (spec_method->is_static() == is_static);
985 991 }
986 992 }
987 993 return false;
988 994 }
989 995
990 996 // ------------------------------------------------------------------
991 997 // ciMethod::print_codes
992 998 //
993 999 // Print the bytecodes for this method.
994 1000 void ciMethod::print_codes_on(outputStream* st) {
995 1001 check_is_loaded();
996 1002 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);)
997 1003 }
998 1004
999 1005
1000 1006 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1001 1007 check_is_loaded(); \
1002 1008 VM_ENTRY_MARK; \
1003 1009 return get_methodOop()->flag_accessor(); \
1004 1010 }
1005 1011
1006 1012 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
1007 1013 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1008 1014 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
1009 1015 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
1010 1016 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
1011 1017 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
1012 1018
1013 1019 BCEscapeAnalyzer *ciMethod::get_bcea() {
1014 1020 if (_bcea == NULL) {
1015 1021 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1016 1022 }
1017 1023 return _bcea;
1018 1024 }
1019 1025
1020 1026 ciMethodBlocks *ciMethod::get_method_blocks() {
1021 1027 Arena *arena = CURRENT_ENV->arena();
1022 1028 if (_method_blocks == NULL) {
1023 1029 _method_blocks = new (arena) ciMethodBlocks(arena, this);
1024 1030 }
1025 1031 return _method_blocks;
1026 1032 }
1027 1033
1028 1034 #undef FETCH_FLAG_FROM_VM
1029 1035
1030 1036
1031 1037 // ------------------------------------------------------------------
1032 1038 // ciMethod::print_codes
1033 1039 //
1034 1040 // Print a range of the bytecodes for this method.
1035 1041 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1036 1042 check_is_loaded();
1037 1043 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);)
1038 1044 }
1039 1045
1040 1046 // ------------------------------------------------------------------
1041 1047 // ciMethod::print_name
1042 1048 //
1043 1049 // Print the name of this method, including signature and some flags.
1044 1050 void ciMethod::print_name(outputStream* st) {
1045 1051 check_is_loaded();
1046 1052 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);)
1047 1053 }
1048 1054
1049 1055 // ------------------------------------------------------------------
1050 1056 // ciMethod::print_short_name
1051 1057 //
1052 1058 // Print the name of this method, without signature.
1053 1059 void ciMethod::print_short_name(outputStream* st) {
1054 1060 check_is_loaded();
1055 1061 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);)
1056 1062 }
1057 1063
1058 1064 // ------------------------------------------------------------------
1059 1065 // ciMethod::print_impl
1060 1066 //
1061 1067 // Implementation of the print method.
1062 1068 void ciMethod::print_impl(outputStream* st) {
1063 1069 ciObject::print_impl(st);
1064 1070 st->print(" name=");
1065 1071 name()->print_symbol_on(st);
1066 1072 st->print(" holder=");
1067 1073 holder()->print_name_on(st);
1068 1074 st->print(" signature=");
1069 1075 signature()->as_symbol()->print_symbol_on(st);
1070 1076 if (is_loaded()) {
1071 1077 st->print(" loaded=true flags=");
1072 1078 flags().print_member_flags(st);
1073 1079 } else {
1074 1080 st->print(" loaded=false");
1075 1081 }
1076 1082 }
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