Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.cpp @ 27:1f530c629c7d
6498878: client compiler crashes on windows when dealing with breakpoint instructions
Summary: _is_compilable check prevents breakpoint bytecodes reversion when loading bytecodes for ciMethod.
Reviewed-by: never
author | kvn |
---|---|
date | Thu, 21 Feb 2008 19:03:44 -0800 |
parents | a61af66fc99e |
children | 44abbb0d4c18 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_ciMethod.cpp.incl" | |
27 | |
28 // ciMethod | |
29 // | |
30 // This class represents a methodOop in the HotSpot virtual | |
31 // machine. | |
32 | |
33 | |
34 // ------------------------------------------------------------------ | |
35 // ciMethod::ciMethod | |
36 // | |
37 // Loaded method. | |
38 ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) { | |
39 assert(h_m() != NULL, "no null method"); | |
40 | |
41 // These fields are always filled in in loaded methods. | |
42 _flags = ciFlags(h_m()->access_flags()); | |
43 | |
44 // Easy to compute, so fill them in now. | |
45 _max_stack = h_m()->max_stack(); | |
46 _max_locals = h_m()->max_locals(); | |
47 _code_size = h_m()->code_size(); | |
48 _intrinsic_id = h_m()->intrinsic_id(); | |
49 _handler_count = h_m()->exception_table()->length() / 4; | |
50 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); | |
51 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); | |
52 _is_compilable = !h_m()->is_not_compilable(); | |
53 // Lazy fields, filled in on demand. Require allocation. | |
54 _code = NULL; | |
55 _exception_handlers = NULL; | |
56 _liveness = NULL; | |
57 _bcea = NULL; | |
58 _method_blocks = NULL; | |
59 #ifdef COMPILER2 | |
60 _flow = NULL; | |
61 #endif // COMPILER2 | |
62 | |
63 if (JvmtiExport::can_hotswap_or_post_breakpoint() && _is_compilable) { | |
64 // 6328518 check hotswap conditions under the right lock. | |
65 MutexLocker locker(Compile_lock); | |
66 if (Dependencies::check_evol_method(h_m()) != NULL) { | |
67 _is_compilable = false; | |
68 } | |
69 } else { | |
70 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
71 } | |
72 | |
73 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) { | |
74 _can_be_statically_bound = h_m()->can_be_statically_bound(); | |
75 } else { | |
76 // Have to use a conservative value in this case. | |
77 _can_be_statically_bound = false; | |
78 } | |
79 | |
80 // Adjust the definition of this condition to be more useful: | |
81 // %%% take these conditions into account in vtable generation | |
82 if (!_can_be_statically_bound && h_m()->is_private()) | |
83 _can_be_statically_bound = true; | |
84 if (_can_be_statically_bound && h_m()->is_abstract()) | |
85 _can_be_statically_bound = false; | |
86 | |
87 ciEnv *env = CURRENT_ENV; | |
88 // generating _signature may allow GC and therefore move m. | |
89 // These fields are always filled in. | |
90 _name = env->get_object(h_m()->name())->as_symbol(); | |
91 _holder = env->get_object(h_m()->method_holder())->as_instance_klass(); | |
92 ciSymbol* sig_symbol = env->get_object(h_m()->signature())->as_symbol(); | |
93 _signature = new (env->arena()) ciSignature(_holder, sig_symbol); | |
94 _method_data = NULL; | |
95 // Take a snapshot of these values, so they will be commensurate with the MDO. | |
96 if (ProfileInterpreter) { | |
97 int invcnt = h_m()->interpreter_invocation_count(); | |
98 // if the value overflowed report it as max int | |
99 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; | |
100 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); | |
101 } else { | |
102 _interpreter_invocation_count = 0; | |
103 _interpreter_throwout_count = 0; | |
104 } | |
105 if (_interpreter_invocation_count == 0) | |
106 _interpreter_invocation_count = 1; | |
107 } | |
108 | |
109 | |
110 // ------------------------------------------------------------------ | |
111 // ciMethod::ciMethod | |
112 // | |
113 // Unloaded method. | |
114 ciMethod::ciMethod(ciInstanceKlass* holder, | |
115 ciSymbol* name, | |
116 ciSymbol* signature) : ciObject(ciMethodKlass::make()) { | |
117 // These fields are always filled in. | |
118 _name = name; | |
119 _holder = holder; | |
120 _signature = new (CURRENT_ENV->arena()) ciSignature(_holder, signature); | |
121 _intrinsic_id = vmIntrinsics::_none; | |
122 _liveness = NULL; | |
123 _can_be_statically_bound = false; | |
124 _bcea = NULL; | |
125 _method_blocks = NULL; | |
126 _method_data = NULL; | |
127 #ifdef COMPILER2 | |
128 _flow = NULL; | |
129 #endif // COMPILER2 | |
130 } | |
131 | |
132 | |
133 // ------------------------------------------------------------------ | |
134 // ciMethod::load_code | |
135 // | |
136 // Load the bytecodes and exception handler table for this method. | |
137 void ciMethod::load_code() { | |
138 VM_ENTRY_MARK; | |
139 assert(is_loaded(), "only loaded methods have code"); | |
140 | |
141 methodOop me = get_methodOop(); | |
142 Arena* arena = CURRENT_THREAD_ENV->arena(); | |
143 | |
144 // Load the bytecodes. | |
145 _code = (address)arena->Amalloc(code_size()); | |
146 memcpy(_code, me->code_base(), code_size()); | |
147 | |
148 // Revert any breakpoint bytecodes in ci's copy | |
27
1f530c629c7d
6498878: client compiler crashes on windows when dealing with breakpoint instructions
kvn
parents:
0
diff
changeset
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149 if (me->number_of_breakpoints() > 0) { |
0 | 150 BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints(); |
151 for (; bp != NULL; bp = bp->next()) { | |
152 if (bp->match(me)) { | |
153 code_at_put(bp->bci(), bp->orig_bytecode()); | |
154 } | |
155 } | |
156 } | |
157 | |
158 // And load the exception table. | |
159 typeArrayOop exc_table = me->exception_table(); | |
160 | |
161 // Allocate one extra spot in our list of exceptions. This | |
162 // last entry will be used to represent the possibility that | |
163 // an exception escapes the method. See ciExceptionHandlerStream | |
164 // for details. | |
165 _exception_handlers = | |
166 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) | |
167 * (_handler_count + 1)); | |
168 if (_handler_count > 0) { | |
169 for (int i=0; i<_handler_count; i++) { | |
170 int base = i*4; | |
171 _exception_handlers[i] = new (arena) ciExceptionHandler( | |
172 holder(), | |
173 /* start */ exc_table->int_at(base), | |
174 /* limit */ exc_table->int_at(base+1), | |
175 /* goto pc */ exc_table->int_at(base+2), | |
176 /* cp index */ exc_table->int_at(base+3)); | |
177 } | |
178 } | |
179 | |
180 // Put an entry at the end of our list to represent the possibility | |
181 // of exceptional exit. | |
182 _exception_handlers[_handler_count] = | |
183 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); | |
184 | |
185 if (CIPrintMethodCodes) { | |
186 print_codes(); | |
187 } | |
188 } | |
189 | |
190 | |
191 // ------------------------------------------------------------------ | |
192 // ciMethod::has_linenumber_table | |
193 // | |
194 // length unknown until decompression | |
195 bool ciMethod::has_linenumber_table() const { | |
196 check_is_loaded(); | |
197 VM_ENTRY_MARK; | |
198 return get_methodOop()->has_linenumber_table(); | |
199 } | |
200 | |
201 | |
202 // ------------------------------------------------------------------ | |
203 // ciMethod::compressed_linenumber_table | |
204 u_char* ciMethod::compressed_linenumber_table() const { | |
205 check_is_loaded(); | |
206 VM_ENTRY_MARK; | |
207 return get_methodOop()->compressed_linenumber_table(); | |
208 } | |
209 | |
210 | |
211 // ------------------------------------------------------------------ | |
212 // ciMethod::line_number_from_bci | |
213 int ciMethod::line_number_from_bci(int bci) const { | |
214 check_is_loaded(); | |
215 VM_ENTRY_MARK; | |
216 return get_methodOop()->line_number_from_bci(bci); | |
217 } | |
218 | |
219 | |
220 // ------------------------------------------------------------------ | |
221 // ciMethod::vtable_index | |
222 // | |
223 // Get the position of this method's entry in the vtable, if any. | |
224 int ciMethod::vtable_index() { | |
225 check_is_loaded(); | |
226 assert(holder()->is_linked(), "must be linked"); | |
227 VM_ENTRY_MARK; | |
228 return get_methodOop()->vtable_index(); | |
229 } | |
230 | |
231 | |
232 // ------------------------------------------------------------------ | |
233 // ciMethod::native_entry | |
234 // | |
235 // Get the address of this method's native code, if any. | |
236 address ciMethod::native_entry() { | |
237 check_is_loaded(); | |
238 assert(flags().is_native(), "must be native method"); | |
239 VM_ENTRY_MARK; | |
240 methodOop method = get_methodOop(); | |
241 address entry = method->native_function(); | |
242 assert(entry != NULL, "must be valid entry point"); | |
243 return entry; | |
244 } | |
245 | |
246 | |
247 // ------------------------------------------------------------------ | |
248 // ciMethod::interpreter_entry | |
249 // | |
250 // Get the entry point for running this method in the interpreter. | |
251 address ciMethod::interpreter_entry() { | |
252 check_is_loaded(); | |
253 VM_ENTRY_MARK; | |
254 methodHandle mh(THREAD, get_methodOop()); | |
255 return Interpreter::entry_for_method(mh); | |
256 } | |
257 | |
258 | |
259 // ------------------------------------------------------------------ | |
260 // ciMethod::uses_balanced_monitors | |
261 // | |
262 // Does this method use monitors in a strict stack-disciplined manner? | |
263 bool ciMethod::has_balanced_monitors() { | |
264 check_is_loaded(); | |
265 if (_balanced_monitors) return true; | |
266 | |
267 // Analyze the method to see if monitors are used properly. | |
268 VM_ENTRY_MARK; | |
269 methodHandle method(THREAD, get_methodOop()); | |
270 assert(method->has_monitor_bytecodes(), "should have checked this"); | |
271 | |
272 // Check to see if a previous compilation computed the | |
273 // monitor-matching analysis. | |
274 if (method->guaranteed_monitor_matching()) { | |
275 _balanced_monitors = true; | |
276 return true; | |
277 } | |
278 | |
279 { | |
280 EXCEPTION_MARK; | |
281 ResourceMark rm(THREAD); | |
282 GeneratePairingInfo gpi(method); | |
283 gpi.compute_map(CATCH); | |
284 if (!gpi.monitor_safe()) { | |
285 return false; | |
286 } | |
287 method->set_guaranteed_monitor_matching(); | |
288 _balanced_monitors = true; | |
289 } | |
290 return true; | |
291 } | |
292 | |
293 | |
294 // ------------------------------------------------------------------ | |
295 // ciMethod::get_flow_analysis | |
296 ciTypeFlow* ciMethod::get_flow_analysis() { | |
297 #ifdef COMPILER2 | |
298 if (_flow == NULL) { | |
299 ciEnv* env = CURRENT_ENV; | |
300 _flow = new (env->arena()) ciTypeFlow(env, this); | |
301 _flow->do_flow(); | |
302 } | |
303 return _flow; | |
304 #else // COMPILER2 | |
305 ShouldNotReachHere(); | |
306 return NULL; | |
307 #endif // COMPILER2 | |
308 } | |
309 | |
310 | |
311 // ------------------------------------------------------------------ | |
312 // ciMethod::get_osr_flow_analysis | |
313 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
314 #ifdef COMPILER2 | |
315 // OSR entry points are always place after a call bytecode of some sort | |
316 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
317 ciEnv* env = CURRENT_ENV; | |
318 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
319 flow->do_flow(); | |
320 return flow; | |
321 #else // COMPILER2 | |
322 ShouldNotReachHere(); | |
323 return NULL; | |
324 #endif // COMPILER2 | |
325 } | |
326 | |
327 // ------------------------------------------------------------------ | |
328 // ciMethod::liveness_at_bci | |
329 // | |
330 // Which local variables are live at a specific bci? | |
331 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
332 check_is_loaded(); | |
333 if (_liveness == NULL) { | |
334 // Create the liveness analyzer. | |
335 Arena* arena = CURRENT_ENV->arena(); | |
336 _liveness = new (arena) MethodLiveness(arena, this); | |
337 _liveness->compute_liveness(); | |
338 } | |
339 MethodLivenessResult result = _liveness->get_liveness_at(bci); | |
340 if (JvmtiExport::can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { | |
341 // Keep all locals live for the user's edification and amusement. | |
342 result.at_put_range(0, result.size(), true); | |
343 } | |
344 return result; | |
345 } | |
346 | |
347 // ciMethod::live_local_oops_at_bci | |
348 // | |
349 // find all the live oops in the locals array for a particular bci | |
350 // Compute what the interpreter believes by using the interpreter | |
351 // oopmap generator. This is used as a double check during osr to | |
352 // guard against conservative result from MethodLiveness making us | |
353 // think a dead oop is live. MethodLiveness is conservative in the | |
354 // sense that it may consider locals to be live which cannot be live, | |
355 // like in the case where a local could contain an oop or a primitive | |
356 // along different paths. In that case the local must be dead when | |
357 // those paths merge. Since the interpreter's viewpoint is used when | |
358 // gc'ing an interpreter frame we need to use its viewpoint during | |
359 // OSR when loading the locals. | |
360 | |
361 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
362 VM_ENTRY_MARK; | |
363 InterpreterOopMap mask; | |
364 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask); | |
365 int mask_size = max_locals(); | |
366 BitMap result(mask_size); | |
367 result.clear(); | |
368 int i; | |
369 for (i = 0; i < mask_size ; i++ ) { | |
370 if (mask.is_oop(i)) result.set_bit(i); | |
371 } | |
372 return result; | |
373 } | |
374 | |
375 | |
376 #ifdef COMPILER1 | |
377 // ------------------------------------------------------------------ | |
378 // ciMethod::bci_block_start | |
379 // | |
380 // Marks all bcis where a new basic block starts | |
381 const BitMap ciMethod::bci_block_start() { | |
382 check_is_loaded(); | |
383 if (_liveness == NULL) { | |
384 // Create the liveness analyzer. | |
385 Arena* arena = CURRENT_ENV->arena(); | |
386 _liveness = new (arena) MethodLiveness(arena, this); | |
387 _liveness->compute_liveness(); | |
388 } | |
389 | |
390 return _liveness->get_bci_block_start(); | |
391 } | |
392 #endif // COMPILER1 | |
393 | |
394 | |
395 // ------------------------------------------------------------------ | |
396 // ciMethod::call_profile_at_bci | |
397 // | |
398 // Get the ciCallProfile for the invocation of this method. | |
399 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
400 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
401 ResourceMark rm; | |
402 ciCallProfile result; | |
403 if (method_data() != NULL && method_data()->is_mature()) { | |
404 ciProfileData* data = method_data()->bci_to_data(bci); | |
405 if (data != NULL && data->is_CounterData()) { | |
406 // Every profiled call site has a counter. | |
407 int count = data->as_CounterData()->count(); | |
408 | |
409 if (!data->is_ReceiverTypeData()) { | |
410 result._receiver_count[0] = 0; // that's a definite zero | |
411 } else { // ReceiverTypeData is a subclass of CounterData | |
412 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
413 // In addition, virtual call sites have receiver type information | |
414 int receivers_count_total = 0; | |
415 int morphism = 0; | |
416 for (uint i = 0; i < call->row_limit(); i++) { | |
417 ciKlass* receiver = call->receiver(i); | |
418 if (receiver == NULL) continue; | |
419 morphism += 1; | |
420 int rcount = call->receiver_count(i); | |
421 if (rcount == 0) rcount = 1; // Should be valid value | |
422 receivers_count_total += rcount; | |
423 // Add the receiver to result data. | |
424 result.add_receiver(receiver, rcount); | |
425 // If we extend profiling to record methods, | |
426 // we will set result._method also. | |
427 } | |
428 // Determine call site's morphism. | |
429 // The call site count could be == (receivers_count_total + 1) | |
430 // not only in the case of a polymorphic call but also in the case | |
431 // when a method data snapshot is taken after the site count was updated | |
432 // but before receivers counters were updated. | |
433 if (morphism == result._limit) { | |
434 // There were no array klasses and morphism <= MorphismLimit. | |
435 if (morphism < ciCallProfile::MorphismLimit || | |
436 morphism == ciCallProfile::MorphismLimit && | |
437 (receivers_count_total+1) >= count) { | |
438 result._morphism = morphism; | |
439 } | |
440 } | |
441 // Make the count consistent if this is a call profile. If count is | |
442 // zero or less, presume that this is a typecheck profile and | |
443 // do nothing. Otherwise, increase count to be the sum of all | |
444 // receiver's counts. | |
445 if (count > 0) { | |
446 if (count < receivers_count_total) { | |
447 count = receivers_count_total; | |
448 } | |
449 } | |
450 } | |
451 result._count = count; | |
452 } | |
453 } | |
454 return result; | |
455 } | |
456 | |
457 // ------------------------------------------------------------------ | |
458 // Add new receiver and sort data by receiver's profile count. | |
459 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
460 // Add new receiver and sort data by receiver's counts when we have space | |
461 // for it otherwise replace the less called receiver (less called receiver | |
462 // is placed to the last array element which is not used). | |
463 // First array's element contains most called receiver. | |
464 int i = _limit; | |
465 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
466 _receiver[i] = _receiver[i-1]; | |
467 _receiver_count[i] = _receiver_count[i-1]; | |
468 } | |
469 _receiver[i] = receiver; | |
470 _receiver_count[i] = receiver_count; | |
471 if (_limit < MorphismLimit) _limit++; | |
472 } | |
473 | |
474 // ------------------------------------------------------------------ | |
475 // ciMethod::find_monomorphic_target | |
476 // | |
477 // Given a certain calling environment, find the monomorphic target | |
478 // for the call. Return NULL if the call is not monomorphic in | |
479 // its calling environment, or if there are only abstract methods. | |
480 // The returned method is never abstract. | |
481 // Note: If caller uses a non-null result, it must inform dependencies | |
482 // via assert_unique_concrete_method or assert_leaf_type. | |
483 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
484 ciInstanceKlass* callee_holder, | |
485 ciInstanceKlass* actual_recv) { | |
486 check_is_loaded(); | |
487 | |
488 if (actual_recv->is_interface()) { | |
489 // %%% We cannot trust interface types, yet. See bug 6312651. | |
490 return NULL; | |
491 } | |
492 | |
493 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
494 if (root_m == NULL) { | |
495 // Something went wrong looking up the actual receiver method. | |
496 return NULL; | |
497 } | |
498 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
499 | |
500 // Make certain quick checks even if UseCHA is false. | |
501 | |
502 // Is it private or final? | |
503 if (root_m->can_be_statically_bound()) { | |
504 return root_m; | |
505 } | |
506 | |
507 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
508 // Easy case. There is no other place to put a method, so don't bother | |
509 // to go through the VM_ENTRY_MARK and all the rest. | |
510 return root_m; | |
511 } | |
512 | |
513 // Array methods (clone, hashCode, etc.) are always statically bound. | |
514 // If we were to see an array type here, we'd return root_m. | |
515 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
516 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
517 // so there is no need to do the same job here. | |
518 | |
519 if (!UseCHA) return NULL; | |
520 | |
521 VM_ENTRY_MARK; | |
522 | |
523 methodHandle target; | |
524 { | |
525 MutexLocker locker(Compile_lock); | |
526 klassOop context = actual_recv->get_klassOop(); | |
527 target = Dependencies::find_unique_concrete_method(context, | |
528 root_m->get_methodOop()); | |
529 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. | |
530 } | |
531 | |
532 #ifndef PRODUCT | |
533 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) { | |
534 tty->print("found a non-root unique target method"); | |
535 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name()); | |
536 tty->print(" method = "); | |
537 target->print_short_name(tty); | |
538 tty->cr(); | |
539 } | |
540 #endif //PRODUCT | |
541 | |
542 if (target() == NULL) { | |
543 return NULL; | |
544 } | |
545 if (target() == root_m->get_methodOop()) { | |
546 return root_m; | |
547 } | |
548 if (!root_m->is_public() && | |
549 !root_m->is_protected()) { | |
550 // If we are going to reason about inheritance, it's easiest | |
551 // if the method in question is public, protected, or private. | |
552 // If the answer is not root_m, it is conservatively correct | |
553 // to return NULL, even if the CHA encountered irrelevant | |
554 // methods in other packages. | |
555 // %%% TO DO: Work out logic for package-private methods | |
556 // with the same name but different vtable indexes. | |
557 return NULL; | |
558 } | |
559 return CURRENT_THREAD_ENV->get_object(target())->as_method(); | |
560 } | |
561 | |
562 // ------------------------------------------------------------------ | |
563 // ciMethod::resolve_invoke | |
564 // | |
565 // Given a known receiver klass, find the target for the call. | |
566 // Return NULL if the call has no target or the target is abstract. | |
567 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
568 check_is_loaded(); | |
569 VM_ENTRY_MARK; | |
570 | |
571 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
572 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop()); | |
573 KlassHandle h_resolved (THREAD, holder()->get_klassOop()); | |
574 symbolHandle h_name (THREAD, name()->get_symbolOop()); | |
575 symbolHandle h_signature (THREAD, signature()->get_symbolOop()); | |
576 | |
577 methodHandle m; | |
578 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
579 // the vtable has not been setup, and the LinkResolver will fail. | |
580 if (h_recv->oop_is_javaArray() | |
581 || | |
582 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { | |
583 if (holder()->is_interface()) { | |
584 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
585 } else { | |
586 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
587 } | |
588 } | |
589 | |
590 if (m.is_null()) { | |
591 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
592 return NULL; | |
593 } | |
594 | |
595 ciMethod* result = this; | |
596 if (m() != get_methodOop()) { | |
597 result = CURRENT_THREAD_ENV->get_object(m())->as_method(); | |
598 } | |
599 | |
600 // Don't return abstract methods because they aren't | |
601 // optimizable or interesting. | |
602 if (result->is_abstract()) { | |
603 return NULL; | |
604 } else { | |
605 return result; | |
606 } | |
607 } | |
608 | |
609 // ------------------------------------------------------------------ | |
610 // ciMethod::resolve_vtable_index | |
611 // | |
612 // Given a known receiver klass, find the vtable index for the call. | |
613 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown. | |
614 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { | |
615 check_is_loaded(); | |
616 | |
617 int vtable_index = methodOopDesc::invalid_vtable_index; | |
618 // Only do lookup if receiver klass has been linked. Otherwise, | |
619 // the vtable has not been setup, and the LinkResolver will fail. | |
620 if (!receiver->is_interface() | |
621 && (!receiver->is_instance_klass() || | |
622 receiver->as_instance_klass()->is_linked())) { | |
623 VM_ENTRY_MARK; | |
624 | |
625 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
626 KlassHandle h_recv (THREAD, receiver->get_klassOop()); | |
627 symbolHandle h_name (THREAD, name()->get_symbolOop()); | |
628 symbolHandle h_signature (THREAD, signature()->get_symbolOop()); | |
629 | |
630 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
631 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
632 // A statically bound method. Return "no such index". | |
633 vtable_index = methodOopDesc::invalid_vtable_index; | |
634 } | |
635 } | |
636 | |
637 return vtable_index; | |
638 } | |
639 | |
640 // ------------------------------------------------------------------ | |
641 // ciMethod::interpreter_call_site_count | |
642 int ciMethod::interpreter_call_site_count(int bci) { | |
643 if (method_data() != NULL) { | |
644 ResourceMark rm; | |
645 ciProfileData* data = method_data()->bci_to_data(bci); | |
646 if (data != NULL && data->is_CounterData()) { | |
647 return scale_count(data->as_CounterData()->count()); | |
648 } | |
649 } | |
650 return -1; // unknown | |
651 } | |
652 | |
653 // ------------------------------------------------------------------ | |
654 // Adjust a CounterData count to be commensurate with | |
655 // interpreter_invocation_count. If the MDO exists for | |
656 // only 25% of the time the method exists, then the | |
657 // counts in the MDO should be scaled by 4X, so that | |
658 // they can be usefully and stably compared against the | |
659 // invocation counts in methods. | |
660 int ciMethod::scale_count(int count, float prof_factor) { | |
661 if (count > 0 && method_data() != NULL) { | |
662 int current_mileage = method_data()->current_mileage(); | |
663 int creation_mileage = method_data()->creation_mileage(); | |
664 int counter_life = current_mileage - creation_mileage; | |
665 int method_life = interpreter_invocation_count(); | |
666 // counter_life due to backedge_counter could be > method_life | |
667 if (counter_life > method_life) | |
668 counter_life = method_life; | |
669 if (0 < counter_life && counter_life <= method_life) { | |
670 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
671 count = (count > 0) ? count : 1; | |
672 } | |
673 } | |
674 return count; | |
675 } | |
676 | |
677 // ------------------------------------------------------------------ | |
678 // ciMethod::build_method_data | |
679 // | |
680 // Generate new methodDataOop objects at compile time. | |
681 void ciMethod::build_method_data(methodHandle h_m) { | |
682 EXCEPTION_CONTEXT; | |
683 if (is_native() || is_abstract() || h_m()->is_accessor()) return; | |
684 if (h_m()->method_data() == NULL) { | |
685 methodOopDesc::build_interpreter_method_data(h_m, THREAD); | |
686 if (HAS_PENDING_EXCEPTION) { | |
687 CLEAR_PENDING_EXCEPTION; | |
688 } | |
689 } | |
690 if (h_m()->method_data() != NULL) { | |
691 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
692 _method_data->load_data(); | |
693 } else { | |
694 _method_data = CURRENT_ENV->get_empty_methodData(); | |
695 } | |
696 } | |
697 | |
698 // public, retroactive version | |
699 void ciMethod::build_method_data() { | |
700 if (_method_data == NULL || _method_data->is_empty()) { | |
701 GUARDED_VM_ENTRY({ | |
702 build_method_data(get_methodOop()); | |
703 }); | |
704 } | |
705 } | |
706 | |
707 | |
708 // ------------------------------------------------------------------ | |
709 // ciMethod::method_data | |
710 // | |
711 ciMethodData* ciMethod::method_data() { | |
712 if (_method_data != NULL) { | |
713 return _method_data; | |
714 } | |
715 VM_ENTRY_MARK; | |
716 ciEnv* env = CURRENT_ENV; | |
717 Thread* my_thread = JavaThread::current(); | |
718 methodHandle h_m(my_thread, get_methodOop()); | |
719 | |
720 if (Tier1UpdateMethodData && is_tier1_compile(env->comp_level())) { | |
721 build_method_data(h_m); | |
722 } | |
723 | |
724 if (h_m()->method_data() != NULL) { | |
725 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
726 _method_data->load_data(); | |
727 } else { | |
728 _method_data = CURRENT_ENV->get_empty_methodData(); | |
729 } | |
730 return _method_data; | |
731 | |
732 } | |
733 | |
734 | |
735 // ------------------------------------------------------------------ | |
736 // ciMethod::will_link | |
737 // | |
738 // Will this method link in a specific calling context? | |
739 bool ciMethod::will_link(ciKlass* accessing_klass, | |
740 ciKlass* declared_method_holder, | |
741 Bytecodes::Code bc) { | |
742 if (!is_loaded()) { | |
743 // Method lookup failed. | |
744 return false; | |
745 } | |
746 | |
747 // The link checks have been front-loaded into the get_method | |
748 // call. This method (ciMethod::will_link()) will be removed | |
749 // in the future. | |
750 | |
751 return true; | |
752 } | |
753 | |
754 // ------------------------------------------------------------------ | |
755 // ciMethod::should_exclude | |
756 // | |
757 // Should this method be excluded from compilation? | |
758 bool ciMethod::should_exclude() { | |
759 check_is_loaded(); | |
760 VM_ENTRY_MARK; | |
761 methodHandle mh(THREAD, get_methodOop()); | |
762 bool ignore; | |
763 return CompilerOracle::should_exclude(mh, ignore); | |
764 } | |
765 | |
766 // ------------------------------------------------------------------ | |
767 // ciMethod::should_inline | |
768 // | |
769 // Should this method be inlined during compilation? | |
770 bool ciMethod::should_inline() { | |
771 check_is_loaded(); | |
772 VM_ENTRY_MARK; | |
773 methodHandle mh(THREAD, get_methodOop()); | |
774 return CompilerOracle::should_inline(mh); | |
775 } | |
776 | |
777 // ------------------------------------------------------------------ | |
778 // ciMethod::should_not_inline | |
779 // | |
780 // Should this method be disallowed from inlining during compilation? | |
781 bool ciMethod::should_not_inline() { | |
782 check_is_loaded(); | |
783 VM_ENTRY_MARK; | |
784 methodHandle mh(THREAD, get_methodOop()); | |
785 return CompilerOracle::should_not_inline(mh); | |
786 } | |
787 | |
788 // ------------------------------------------------------------------ | |
789 // ciMethod::should_print_assembly | |
790 // | |
791 // Should the compiler print the generated code for this method? | |
792 bool ciMethod::should_print_assembly() { | |
793 check_is_loaded(); | |
794 VM_ENTRY_MARK; | |
795 methodHandle mh(THREAD, get_methodOop()); | |
796 return CompilerOracle::should_print(mh); | |
797 } | |
798 | |
799 // ------------------------------------------------------------------ | |
800 // ciMethod::break_at_execute | |
801 // | |
802 // Should the compiler insert a breakpoint into the generated code | |
803 // method? | |
804 bool ciMethod::break_at_execute() { | |
805 check_is_loaded(); | |
806 VM_ENTRY_MARK; | |
807 methodHandle mh(THREAD, get_methodOop()); | |
808 return CompilerOracle::should_break_at(mh); | |
809 } | |
810 | |
811 // ------------------------------------------------------------------ | |
812 // ciMethod::has_option | |
813 // | |
814 bool ciMethod::has_option(const char* option) { | |
815 check_is_loaded(); | |
816 VM_ENTRY_MARK; | |
817 methodHandle mh(THREAD, get_methodOop()); | |
818 return CompilerOracle::has_option_string(mh, option); | |
819 } | |
820 | |
821 // ------------------------------------------------------------------ | |
822 // ciMethod::can_be_compiled | |
823 // | |
824 // Have previous compilations of this method succeeded? | |
825 bool ciMethod::can_be_compiled() { | |
826 check_is_loaded(); | |
827 return _is_compilable; | |
828 } | |
829 | |
830 // ------------------------------------------------------------------ | |
831 // ciMethod::set_not_compilable | |
832 // | |
833 // Tell the VM that this method cannot be compiled at all. | |
834 void ciMethod::set_not_compilable() { | |
835 check_is_loaded(); | |
836 VM_ENTRY_MARK; | |
837 _is_compilable = false; | |
838 get_methodOop()->set_not_compilable(); | |
839 } | |
840 | |
841 // ------------------------------------------------------------------ | |
842 // ciMethod::can_be_osr_compiled | |
843 // | |
844 // Have previous compilations of this method succeeded? | |
845 // | |
846 // Implementation note: the VM does not currently keep track | |
847 // of failed OSR compilations per bci. The entry_bci parameter | |
848 // is currently unused. | |
849 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
850 check_is_loaded(); | |
851 VM_ENTRY_MARK; | |
852 return !get_methodOop()->access_flags().is_not_osr_compilable(); | |
853 } | |
854 | |
855 // ------------------------------------------------------------------ | |
856 // ciMethod::has_compiled_code | |
857 bool ciMethod::has_compiled_code() { | |
858 VM_ENTRY_MARK; | |
859 return get_methodOop()->code() != NULL; | |
860 } | |
861 | |
862 // ------------------------------------------------------------------ | |
863 // ciMethod::instructions_size | |
864 // This is a rough metric for "fat" methods, compared | |
865 // before inlining with InlineSmallCode. | |
866 // The CodeBlob::instructions_size accessor includes | |
867 // junk like exception handler, stubs, and constant table, | |
868 // which are not highly relevant to an inlined method. | |
869 // So we use the more specific accessor nmethod::code_size. | |
870 int ciMethod::instructions_size() { | |
871 GUARDED_VM_ENTRY( | |
872 nmethod* code = get_methodOop()->code(); | |
873 // if there's no compiled code or the code was produced by the | |
874 // tier1 profiler return 0 for the code size. This should | |
875 // probably be based on the compilation level of the nmethod but | |
876 // that currently isn't properly recorded. | |
877 if (code == NULL || | |
878 (TieredCompilation && code->compiler() != NULL && code->compiler()->is_c1())) { | |
879 return 0; | |
880 } | |
881 return code->code_size(); | |
882 ) | |
883 } | |
884 | |
885 // ------------------------------------------------------------------ | |
886 // ciMethod::log_nmethod_identity | |
887 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
888 GUARDED_VM_ENTRY( | |
889 nmethod* code = get_methodOop()->code(); | |
890 if (code != NULL) { | |
891 code->log_identity(log); | |
892 } | |
893 ) | |
894 } | |
895 | |
896 // ------------------------------------------------------------------ | |
897 // ciMethod::is_not_reached | |
898 bool ciMethod::is_not_reached(int bci) { | |
899 check_is_loaded(); | |
900 VM_ENTRY_MARK; | |
901 return Interpreter::is_not_reached( | |
902 methodHandle(THREAD, get_methodOop()), bci); | |
903 } | |
904 | |
905 // ------------------------------------------------------------------ | |
906 // ciMethod::was_never_executed | |
907 bool ciMethod::was_executed_more_than(int times) { | |
908 VM_ENTRY_MARK; | |
909 return get_methodOop()->was_executed_more_than(times); | |
910 } | |
911 | |
912 // ------------------------------------------------------------------ | |
913 // ciMethod::has_unloaded_classes_in_signature | |
914 bool ciMethod::has_unloaded_classes_in_signature() { | |
915 VM_ENTRY_MARK; | |
916 { | |
917 EXCEPTION_MARK; | |
918 methodHandle m(THREAD, get_methodOop()); | |
919 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); | |
920 if( HAS_PENDING_EXCEPTION ) { | |
921 CLEAR_PENDING_EXCEPTION; | |
922 return true; // Declare that we may have unloaded classes | |
923 } | |
924 return has_unloaded; | |
925 } | |
926 } | |
927 | |
928 // ------------------------------------------------------------------ | |
929 // ciMethod::is_klass_loaded | |
930 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
931 VM_ENTRY_MARK; | |
932 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved); | |
933 } | |
934 | |
935 // ------------------------------------------------------------------ | |
936 // ciMethod::check_call | |
937 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
938 VM_ENTRY_MARK; | |
939 { | |
940 EXCEPTION_MARK; | |
941 HandleMark hm(THREAD); | |
942 constantPoolHandle pool (THREAD, get_methodOop()->constants()); | |
943 methodHandle spec_method; | |
944 KlassHandle spec_klass; | |
945 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD); | |
946 if (HAS_PENDING_EXCEPTION) { | |
947 CLEAR_PENDING_EXCEPTION; | |
948 return false; | |
949 } else { | |
950 return (spec_method->is_static() == is_static); | |
951 } | |
952 } | |
953 return false; | |
954 } | |
955 | |
956 // ------------------------------------------------------------------ | |
957 // ciMethod::print_codes | |
958 // | |
959 // Print the bytecodes for this method. | |
960 void ciMethod::print_codes_on(outputStream* st) { | |
961 check_is_loaded(); | |
962 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);) | |
963 } | |
964 | |
965 | |
966 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
967 check_is_loaded(); \ | |
968 VM_ENTRY_MARK; \ | |
969 return get_methodOop()->flag_accessor(); \ | |
970 } | |
971 | |
972 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
973 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
974 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
975 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
976 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
977 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
978 | |
979 BCEscapeAnalyzer *ciMethod::get_bcea() { | |
980 if (_bcea == NULL) { | |
981 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
982 } | |
983 return _bcea; | |
984 } | |
985 | |
986 ciMethodBlocks *ciMethod::get_method_blocks() { | |
987 Arena *arena = CURRENT_ENV->arena(); | |
988 if (_method_blocks == NULL) { | |
989 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
990 } | |
991 return _method_blocks; | |
992 } | |
993 | |
994 #undef FETCH_FLAG_FROM_VM | |
995 | |
996 | |
997 // ------------------------------------------------------------------ | |
998 // ciMethod::print_codes | |
999 // | |
1000 // Print a range of the bytecodes for this method. | |
1001 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1002 check_is_loaded(); | |
1003 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);) | |
1004 } | |
1005 | |
1006 // ------------------------------------------------------------------ | |
1007 // ciMethod::print_name | |
1008 // | |
1009 // Print the name of this method, including signature and some flags. | |
1010 void ciMethod::print_name(outputStream* st) { | |
1011 check_is_loaded(); | |
1012 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);) | |
1013 } | |
1014 | |
1015 // ------------------------------------------------------------------ | |
1016 // ciMethod::print_short_name | |
1017 // | |
1018 // Print the name of this method, without signature. | |
1019 void ciMethod::print_short_name(outputStream* st) { | |
1020 check_is_loaded(); | |
1021 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);) | |
1022 } | |
1023 | |
1024 // ------------------------------------------------------------------ | |
1025 // ciMethod::print_impl | |
1026 // | |
1027 // Implementation of the print method. | |
1028 void ciMethod::print_impl(outputStream* st) { | |
1029 ciObject::print_impl(st); | |
1030 st->print(" name="); | |
1031 name()->print_symbol_on(st); | |
1032 st->print(" holder="); | |
1033 holder()->print_name_on(st); | |
1034 st->print(" signature="); | |
1035 signature()->as_symbol()->print_symbol_on(st); | |
1036 if (is_loaded()) { | |
1037 st->print(" loaded=true flags="); | |
1038 flags().print_member_flags(st); | |
1039 } else { | |
1040 st->print(" loaded=false"); | |
1041 } | |
1042 } |