Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciMethod.cpp @ 1782:f353275af40e
6981773: incorrect fill value with OptimizeFill
Reviewed-by: kvn, twisti
author | never |
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date | Thu, 02 Sep 2010 11:40:02 -0700 |
parents | 3e8fbc61cee8 |
children | d5d065957597 |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 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 _method_blocks = NULL; | |
1692 | 58 #if defined(COMPILER2) || defined(SHARK) |
0 | 59 _flow = NULL; |
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60 _bcea = NULL; |
1692 | 61 #endif // COMPILER2 || SHARK |
0 | 62 |
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63 ciEnv *env = CURRENT_ENV; |
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64 if (env->jvmti_can_hotswap_or_post_breakpoint() && _is_compilable) { |
0 | 65 // 6328518 check hotswap conditions under the right lock. |
66 MutexLocker locker(Compile_lock); | |
67 if (Dependencies::check_evol_method(h_m()) != NULL) { | |
68 _is_compilable = false; | |
69 } | |
70 } else { | |
71 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
72 } | |
73 | |
74 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) { | |
75 _can_be_statically_bound = h_m()->can_be_statically_bound(); | |
76 } else { | |
77 // Have to use a conservative value in this case. | |
78 _can_be_statically_bound = false; | |
79 } | |
80 | |
81 // Adjust the definition of this condition to be more useful: | |
82 // %%% take these conditions into account in vtable generation | |
83 if (!_can_be_statically_bound && h_m()->is_private()) | |
84 _can_be_statically_bound = true; | |
85 if (_can_be_statically_bound && h_m()->is_abstract()) | |
86 _can_be_statically_bound = false; | |
87 | |
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 _method_blocks = NULL; | |
125 _method_data = NULL; | |
1692 | 126 #if defined(COMPILER2) || defined(SHARK) |
0 | 127 _flow = NULL; |
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128 _bcea = NULL; |
1692 | 129 #endif // COMPILER2 || SHARK |
0 | 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 | |
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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 | |
1692 | 232 #ifdef SHARK |
233 // ------------------------------------------------------------------ | |
234 // ciMethod::itable_index | |
235 // | |
236 // Get the position of this method's entry in the itable, if any. | |
237 int ciMethod::itable_index() { | |
238 check_is_loaded(); | |
239 assert(holder()->is_linked(), "must be linked"); | |
240 VM_ENTRY_MARK; | |
241 return klassItable::compute_itable_index(get_methodOop()); | |
242 } | |
243 #endif // SHARK | |
244 | |
245 | |
0 | 246 // ------------------------------------------------------------------ |
247 // ciMethod::native_entry | |
248 // | |
249 // Get the address of this method's native code, if any. | |
250 address ciMethod::native_entry() { | |
251 check_is_loaded(); | |
252 assert(flags().is_native(), "must be native method"); | |
253 VM_ENTRY_MARK; | |
254 methodOop method = get_methodOop(); | |
255 address entry = method->native_function(); | |
256 assert(entry != NULL, "must be valid entry point"); | |
257 return entry; | |
258 } | |
259 | |
260 | |
261 // ------------------------------------------------------------------ | |
262 // ciMethod::interpreter_entry | |
263 // | |
264 // Get the entry point for running this method in the interpreter. | |
265 address ciMethod::interpreter_entry() { | |
266 check_is_loaded(); | |
267 VM_ENTRY_MARK; | |
268 methodHandle mh(THREAD, get_methodOop()); | |
269 return Interpreter::entry_for_method(mh); | |
270 } | |
271 | |
272 | |
273 // ------------------------------------------------------------------ | |
274 // ciMethod::uses_balanced_monitors | |
275 // | |
276 // Does this method use monitors in a strict stack-disciplined manner? | |
277 bool ciMethod::has_balanced_monitors() { | |
278 check_is_loaded(); | |
279 if (_balanced_monitors) return true; | |
280 | |
281 // Analyze the method to see if monitors are used properly. | |
282 VM_ENTRY_MARK; | |
283 methodHandle method(THREAD, get_methodOop()); | |
284 assert(method->has_monitor_bytecodes(), "should have checked this"); | |
285 | |
286 // Check to see if a previous compilation computed the | |
287 // monitor-matching analysis. | |
288 if (method->guaranteed_monitor_matching()) { | |
289 _balanced_monitors = true; | |
290 return true; | |
291 } | |
292 | |
293 { | |
294 EXCEPTION_MARK; | |
295 ResourceMark rm(THREAD); | |
296 GeneratePairingInfo gpi(method); | |
297 gpi.compute_map(CATCH); | |
298 if (!gpi.monitor_safe()) { | |
299 return false; | |
300 } | |
301 method->set_guaranteed_monitor_matching(); | |
302 _balanced_monitors = true; | |
303 } | |
304 return true; | |
305 } | |
306 | |
307 | |
308 // ------------------------------------------------------------------ | |
309 // ciMethod::get_flow_analysis | |
310 ciTypeFlow* ciMethod::get_flow_analysis() { | |
1692 | 311 #if defined(COMPILER2) || defined(SHARK) |
0 | 312 if (_flow == NULL) { |
313 ciEnv* env = CURRENT_ENV; | |
314 _flow = new (env->arena()) ciTypeFlow(env, this); | |
315 _flow->do_flow(); | |
316 } | |
317 return _flow; | |
1692 | 318 #else // COMPILER2 || SHARK |
0 | 319 ShouldNotReachHere(); |
320 return NULL; | |
1692 | 321 #endif // COMPILER2 || SHARK |
0 | 322 } |
323 | |
324 | |
325 // ------------------------------------------------------------------ | |
326 // ciMethod::get_osr_flow_analysis | |
327 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
1692 | 328 #if defined(COMPILER2) || defined(SHARK) |
0 | 329 // OSR entry points are always place after a call bytecode of some sort |
330 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
331 ciEnv* env = CURRENT_ENV; | |
332 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
333 flow->do_flow(); | |
334 return flow; | |
1692 | 335 #else // COMPILER2 || SHARK |
0 | 336 ShouldNotReachHere(); |
337 return NULL; | |
1692 | 338 #endif // COMPILER2 || SHARK |
0 | 339 } |
340 | |
341 // ------------------------------------------------------------------ | |
991 | 342 // ciMethod::raw_liveness_at_bci |
0 | 343 // |
344 // Which local variables are live at a specific bci? | |
991 | 345 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
0 | 346 check_is_loaded(); |
347 if (_liveness == NULL) { | |
348 // Create the liveness analyzer. | |
349 Arena* arena = CURRENT_ENV->arena(); | |
350 _liveness = new (arena) MethodLiveness(arena, this); | |
351 _liveness->compute_liveness(); | |
352 } | |
991 | 353 return _liveness->get_liveness_at(bci); |
354 } | |
355 | |
356 // ------------------------------------------------------------------ | |
357 // ciMethod::liveness_at_bci | |
358 // | |
359 // Which local variables are live at a specific bci? When debugging | |
360 // will return true for all locals in some cases to improve debug | |
361 // information. | |
362 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
363 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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364 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { |
0 | 365 // Keep all locals live for the user's edification and amusement. |
366 result.at_put_range(0, result.size(), true); | |
367 } | |
368 return result; | |
369 } | |
370 | |
371 // ciMethod::live_local_oops_at_bci | |
372 // | |
373 // find all the live oops in the locals array for a particular bci | |
374 // Compute what the interpreter believes by using the interpreter | |
375 // oopmap generator. This is used as a double check during osr to | |
376 // guard against conservative result from MethodLiveness making us | |
377 // think a dead oop is live. MethodLiveness is conservative in the | |
378 // sense that it may consider locals to be live which cannot be live, | |
379 // like in the case where a local could contain an oop or a primitive | |
380 // along different paths. In that case the local must be dead when | |
381 // those paths merge. Since the interpreter's viewpoint is used when | |
382 // gc'ing an interpreter frame we need to use its viewpoint during | |
383 // OSR when loading the locals. | |
384 | |
385 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
386 VM_ENTRY_MARK; | |
387 InterpreterOopMap mask; | |
388 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask); | |
389 int mask_size = max_locals(); | |
390 BitMap result(mask_size); | |
391 result.clear(); | |
392 int i; | |
393 for (i = 0; i < mask_size ; i++ ) { | |
394 if (mask.is_oop(i)) result.set_bit(i); | |
395 } | |
396 return result; | |
397 } | |
398 | |
399 | |
400 #ifdef COMPILER1 | |
401 // ------------------------------------------------------------------ | |
402 // ciMethod::bci_block_start | |
403 // | |
404 // Marks all bcis where a new basic block starts | |
405 const BitMap ciMethod::bci_block_start() { | |
406 check_is_loaded(); | |
407 if (_liveness == NULL) { | |
408 // Create the liveness analyzer. | |
409 Arena* arena = CURRENT_ENV->arena(); | |
410 _liveness = new (arena) MethodLiveness(arena, this); | |
411 _liveness->compute_liveness(); | |
412 } | |
413 | |
414 return _liveness->get_bci_block_start(); | |
415 } | |
416 #endif // COMPILER1 | |
417 | |
418 | |
419 // ------------------------------------------------------------------ | |
420 // ciMethod::call_profile_at_bci | |
421 // | |
422 // Get the ciCallProfile for the invocation of this method. | |
423 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
424 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
425 ResourceMark rm; | |
426 ciCallProfile result; | |
427 if (method_data() != NULL && method_data()->is_mature()) { | |
428 ciProfileData* data = method_data()->bci_to_data(bci); | |
429 if (data != NULL && data->is_CounterData()) { | |
430 // Every profiled call site has a counter. | |
431 int count = data->as_CounterData()->count(); | |
432 | |
433 if (!data->is_ReceiverTypeData()) { | |
434 result._receiver_count[0] = 0; // that's a definite zero | |
435 } else { // ReceiverTypeData is a subclass of CounterData | |
436 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
437 // In addition, virtual call sites have receiver type information | |
438 int receivers_count_total = 0; | |
439 int morphism = 0; | |
440 for (uint i = 0; i < call->row_limit(); i++) { | |
441 ciKlass* receiver = call->receiver(i); | |
442 if (receiver == NULL) continue; | |
443 morphism += 1; | |
444 int rcount = call->receiver_count(i); | |
445 if (rcount == 0) rcount = 1; // Should be valid value | |
446 receivers_count_total += rcount; | |
447 // Add the receiver to result data. | |
448 result.add_receiver(receiver, rcount); | |
449 // If we extend profiling to record methods, | |
450 // we will set result._method also. | |
451 } | |
452 // Determine call site's morphism. | |
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453 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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454 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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455 // The call site count is > 0 in the case of a polymorphic virtual call. |
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456 if (morphism > 0 && morphism == result._limit) { |
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457 // The morphism <= MorphismLimit. |
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458 if ((morphism < ciCallProfile::MorphismLimit) || |
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459 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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460 #ifdef ASSERT |
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461 if (count > 0) { |
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462 this->print_short_name(tty); |
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463 tty->print_cr(" @ bci:%d", bci); |
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464 this->print_codes(); |
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465 assert(false, "this call site should not be polymorphic"); |
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466 } |
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467 #endif |
0 | 468 result._morphism = morphism; |
469 } | |
470 } | |
471 // Make the count consistent if this is a call profile. If count is | |
472 // zero or less, presume that this is a typecheck profile and | |
473 // do nothing. Otherwise, increase count to be the sum of all | |
474 // receiver's counts. | |
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475 if (count >= 0) { |
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476 count += receivers_count_total; |
0 | 477 } |
478 } | |
479 result._count = count; | |
480 } | |
481 } | |
482 return result; | |
483 } | |
484 | |
485 // ------------------------------------------------------------------ | |
486 // Add new receiver and sort data by receiver's profile count. | |
487 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
488 // Add new receiver and sort data by receiver's counts when we have space | |
489 // for it otherwise replace the less called receiver (less called receiver | |
490 // is placed to the last array element which is not used). | |
491 // First array's element contains most called receiver. | |
492 int i = _limit; | |
493 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
494 _receiver[i] = _receiver[i-1]; | |
495 _receiver_count[i] = _receiver_count[i-1]; | |
496 } | |
497 _receiver[i] = receiver; | |
498 _receiver_count[i] = receiver_count; | |
499 if (_limit < MorphismLimit) _limit++; | |
500 } | |
501 | |
502 // ------------------------------------------------------------------ | |
503 // ciMethod::find_monomorphic_target | |
504 // | |
505 // Given a certain calling environment, find the monomorphic target | |
506 // for the call. Return NULL if the call is not monomorphic in | |
507 // its calling environment, or if there are only abstract methods. | |
508 // The returned method is never abstract. | |
509 // Note: If caller uses a non-null result, it must inform dependencies | |
510 // via assert_unique_concrete_method or assert_leaf_type. | |
511 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
512 ciInstanceKlass* callee_holder, | |
513 ciInstanceKlass* actual_recv) { | |
514 check_is_loaded(); | |
515 | |
516 if (actual_recv->is_interface()) { | |
517 // %%% We cannot trust interface types, yet. See bug 6312651. | |
518 return NULL; | |
519 } | |
520 | |
521 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
522 if (root_m == NULL) { | |
523 // Something went wrong looking up the actual receiver method. | |
524 return NULL; | |
525 } | |
526 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
527 | |
528 // Make certain quick checks even if UseCHA is false. | |
529 | |
530 // Is it private or final? | |
531 if (root_m->can_be_statically_bound()) { | |
532 return root_m; | |
533 } | |
534 | |
535 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
536 // Easy case. There is no other place to put a method, so don't bother | |
537 // to go through the VM_ENTRY_MARK and all the rest. | |
538 return root_m; | |
539 } | |
540 | |
541 // Array methods (clone, hashCode, etc.) are always statically bound. | |
542 // If we were to see an array type here, we'd return root_m. | |
543 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
544 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
545 // so there is no need to do the same job here. | |
546 | |
547 if (!UseCHA) return NULL; | |
548 | |
549 VM_ENTRY_MARK; | |
550 | |
551 methodHandle target; | |
552 { | |
553 MutexLocker locker(Compile_lock); | |
554 klassOop context = actual_recv->get_klassOop(); | |
555 target = Dependencies::find_unique_concrete_method(context, | |
556 root_m->get_methodOop()); | |
557 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. | |
558 } | |
559 | |
560 #ifndef PRODUCT | |
561 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) { | |
562 tty->print("found a non-root unique target method"); | |
563 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name()); | |
564 tty->print(" method = "); | |
565 target->print_short_name(tty); | |
566 tty->cr(); | |
567 } | |
568 #endif //PRODUCT | |
569 | |
570 if (target() == NULL) { | |
571 return NULL; | |
572 } | |
573 if (target() == root_m->get_methodOop()) { | |
574 return root_m; | |
575 } | |
576 if (!root_m->is_public() && | |
577 !root_m->is_protected()) { | |
578 // If we are going to reason about inheritance, it's easiest | |
579 // if the method in question is public, protected, or private. | |
580 // If the answer is not root_m, it is conservatively correct | |
581 // to return NULL, even if the CHA encountered irrelevant | |
582 // methods in other packages. | |
583 // %%% TO DO: Work out logic for package-private methods | |
584 // with the same name but different vtable indexes. | |
585 return NULL; | |
586 } | |
587 return CURRENT_THREAD_ENV->get_object(target())->as_method(); | |
588 } | |
589 | |
590 // ------------------------------------------------------------------ | |
591 // ciMethod::resolve_invoke | |
592 // | |
593 // Given a known receiver klass, find the target for the call. | |
594 // Return NULL if the call has no target or the target is abstract. | |
595 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
596 check_is_loaded(); | |
597 VM_ENTRY_MARK; | |
598 | |
599 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
600 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop()); | |
601 KlassHandle h_resolved (THREAD, holder()->get_klassOop()); | |
602 symbolHandle h_name (THREAD, name()->get_symbolOop()); | |
603 symbolHandle h_signature (THREAD, signature()->get_symbolOop()); | |
604 | |
605 methodHandle m; | |
606 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
607 // the vtable has not been setup, and the LinkResolver will fail. | |
608 if (h_recv->oop_is_javaArray() | |
609 || | |
610 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { | |
611 if (holder()->is_interface()) { | |
612 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
613 } else { | |
614 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
615 } | |
616 } | |
617 | |
618 if (m.is_null()) { | |
619 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
620 return NULL; | |
621 } | |
622 | |
623 ciMethod* result = this; | |
624 if (m() != get_methodOop()) { | |
625 result = CURRENT_THREAD_ENV->get_object(m())->as_method(); | |
626 } | |
627 | |
628 // Don't return abstract methods because they aren't | |
629 // optimizable or interesting. | |
630 if (result->is_abstract()) { | |
631 return NULL; | |
632 } else { | |
633 return result; | |
634 } | |
635 } | |
636 | |
637 // ------------------------------------------------------------------ | |
638 // ciMethod::resolve_vtable_index | |
639 // | |
640 // Given a known receiver klass, find the vtable index for the call. | |
641 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown. | |
642 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { | |
643 check_is_loaded(); | |
644 | |
645 int vtable_index = methodOopDesc::invalid_vtable_index; | |
646 // Only do lookup if receiver klass has been linked. Otherwise, | |
647 // the vtable has not been setup, and the LinkResolver will fail. | |
648 if (!receiver->is_interface() | |
649 && (!receiver->is_instance_klass() || | |
650 receiver->as_instance_klass()->is_linked())) { | |
651 VM_ENTRY_MARK; | |
652 | |
653 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
654 KlassHandle h_recv (THREAD, receiver->get_klassOop()); | |
655 symbolHandle h_name (THREAD, name()->get_symbolOop()); | |
656 symbolHandle h_signature (THREAD, signature()->get_symbolOop()); | |
657 | |
658 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
659 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
660 // A statically bound method. Return "no such index". | |
661 vtable_index = methodOopDesc::invalid_vtable_index; | |
662 } | |
663 } | |
664 | |
665 return vtable_index; | |
666 } | |
667 | |
668 // ------------------------------------------------------------------ | |
669 // ciMethod::interpreter_call_site_count | |
670 int ciMethod::interpreter_call_site_count(int bci) { | |
671 if (method_data() != NULL) { | |
672 ResourceMark rm; | |
673 ciProfileData* data = method_data()->bci_to_data(bci); | |
674 if (data != NULL && data->is_CounterData()) { | |
675 return scale_count(data->as_CounterData()->count()); | |
676 } | |
677 } | |
678 return -1; // unknown | |
679 } | |
680 | |
681 // ------------------------------------------------------------------ | |
682 // Adjust a CounterData count to be commensurate with | |
683 // interpreter_invocation_count. If the MDO exists for | |
684 // only 25% of the time the method exists, then the | |
685 // counts in the MDO should be scaled by 4X, so that | |
686 // they can be usefully and stably compared against the | |
687 // invocation counts in methods. | |
688 int ciMethod::scale_count(int count, float prof_factor) { | |
689 if (count > 0 && method_data() != NULL) { | |
690 int current_mileage = method_data()->current_mileage(); | |
691 int creation_mileage = method_data()->creation_mileage(); | |
692 int counter_life = current_mileage - creation_mileage; | |
693 int method_life = interpreter_invocation_count(); | |
694 // counter_life due to backedge_counter could be > method_life | |
695 if (counter_life > method_life) | |
696 counter_life = method_life; | |
697 if (0 < counter_life && counter_life <= method_life) { | |
698 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
699 count = (count > 0) ? count : 1; | |
700 } | |
701 } | |
702 return count; | |
703 } | |
704 | |
705 // ------------------------------------------------------------------ | |
710 | 706 // invokedynamic support |
1564 | 707 |
708 // ------------------------------------------------------------------ | |
709 // ciMethod::is_method_handle_invoke | |
710 | 710 // |
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711 // Return true if the method is an instance of one of the two |
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712 // signature-polymorphic MethodHandle methods, invokeExact or invokeGeneric. |
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713 bool ciMethod::is_method_handle_invoke() const { |
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714 if (!is_loaded()) return false; |
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715 VM_ENTRY_MARK; |
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716 return get_methodOop()->is_method_handle_invoke(); |
710 | 717 } |
718 | |
1564 | 719 // ------------------------------------------------------------------ |
720 // ciMethod::is_method_handle_adapter | |
721 // | |
722 // Return true if the method is a generated MethodHandle adapter. | |
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723 // These are built by MethodHandleCompiler. |
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724 bool ciMethod::is_method_handle_adapter() const { |
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725 if (!is_loaded()) return false; |
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726 VM_ENTRY_MARK; |
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727 return get_methodOop()->is_method_handle_adapter(); |
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728 } |
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729 |
710 | 730 ciInstance* ciMethod::method_handle_type() { |
731 check_is_loaded(); | |
732 VM_ENTRY_MARK; | |
733 oop mtype = get_methodOop()->method_handle_type(); | |
734 return CURRENT_THREAD_ENV->get_object(mtype)->as_instance(); | |
735 } | |
736 | |
737 | |
738 // ------------------------------------------------------------------ | |
0 | 739 // ciMethod::build_method_data |
740 // | |
741 // Generate new methodDataOop objects at compile time. | |
742 void ciMethod::build_method_data(methodHandle h_m) { | |
743 EXCEPTION_CONTEXT; | |
744 if (is_native() || is_abstract() || h_m()->is_accessor()) return; | |
745 if (h_m()->method_data() == NULL) { | |
746 methodOopDesc::build_interpreter_method_data(h_m, THREAD); | |
747 if (HAS_PENDING_EXCEPTION) { | |
748 CLEAR_PENDING_EXCEPTION; | |
749 } | |
750 } | |
751 if (h_m()->method_data() != NULL) { | |
752 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
753 _method_data->load_data(); | |
754 } else { | |
755 _method_data = CURRENT_ENV->get_empty_methodData(); | |
756 } | |
757 } | |
758 | |
759 // public, retroactive version | |
760 void ciMethod::build_method_data() { | |
761 if (_method_data == NULL || _method_data->is_empty()) { | |
762 GUARDED_VM_ENTRY({ | |
763 build_method_data(get_methodOop()); | |
764 }); | |
765 } | |
766 } | |
767 | |
768 | |
769 // ------------------------------------------------------------------ | |
770 // ciMethod::method_data | |
771 // | |
772 ciMethodData* ciMethod::method_data() { | |
773 if (_method_data != NULL) { | |
774 return _method_data; | |
775 } | |
776 VM_ENTRY_MARK; | |
777 ciEnv* env = CURRENT_ENV; | |
778 Thread* my_thread = JavaThread::current(); | |
779 methodHandle h_m(my_thread, get_methodOop()); | |
780 | |
781 if (Tier1UpdateMethodData && is_tier1_compile(env->comp_level())) { | |
782 build_method_data(h_m); | |
783 } | |
784 | |
785 if (h_m()->method_data() != NULL) { | |
786 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
787 _method_data->load_data(); | |
788 } else { | |
789 _method_data = CURRENT_ENV->get_empty_methodData(); | |
790 } | |
791 return _method_data; | |
792 | |
793 } | |
794 | |
795 | |
796 // ------------------------------------------------------------------ | |
797 // ciMethod::will_link | |
798 // | |
799 // Will this method link in a specific calling context? | |
800 bool ciMethod::will_link(ciKlass* accessing_klass, | |
801 ciKlass* declared_method_holder, | |
802 Bytecodes::Code bc) { | |
803 if (!is_loaded()) { | |
804 // Method lookup failed. | |
805 return false; | |
806 } | |
807 | |
808 // The link checks have been front-loaded into the get_method | |
809 // call. This method (ciMethod::will_link()) will be removed | |
810 // in the future. | |
811 | |
812 return true; | |
813 } | |
814 | |
815 // ------------------------------------------------------------------ | |
816 // ciMethod::should_exclude | |
817 // | |
818 // Should this method be excluded from compilation? | |
819 bool ciMethod::should_exclude() { | |
820 check_is_loaded(); | |
821 VM_ENTRY_MARK; | |
822 methodHandle mh(THREAD, get_methodOop()); | |
823 bool ignore; | |
824 return CompilerOracle::should_exclude(mh, ignore); | |
825 } | |
826 | |
827 // ------------------------------------------------------------------ | |
828 // ciMethod::should_inline | |
829 // | |
830 // Should this method be inlined during compilation? | |
831 bool ciMethod::should_inline() { | |
832 check_is_loaded(); | |
833 VM_ENTRY_MARK; | |
834 methodHandle mh(THREAD, get_methodOop()); | |
835 return CompilerOracle::should_inline(mh); | |
836 } | |
837 | |
838 // ------------------------------------------------------------------ | |
839 // ciMethod::should_not_inline | |
840 // | |
841 // Should this method be disallowed from inlining during compilation? | |
842 bool ciMethod::should_not_inline() { | |
843 check_is_loaded(); | |
844 VM_ENTRY_MARK; | |
845 methodHandle mh(THREAD, get_methodOop()); | |
846 return CompilerOracle::should_not_inline(mh); | |
847 } | |
848 | |
849 // ------------------------------------------------------------------ | |
850 // ciMethod::should_print_assembly | |
851 // | |
852 // Should the compiler print the generated code for this method? | |
853 bool ciMethod::should_print_assembly() { | |
854 check_is_loaded(); | |
855 VM_ENTRY_MARK; | |
856 methodHandle mh(THREAD, get_methodOop()); | |
857 return CompilerOracle::should_print(mh); | |
858 } | |
859 | |
860 // ------------------------------------------------------------------ | |
861 // ciMethod::break_at_execute | |
862 // | |
863 // Should the compiler insert a breakpoint into the generated code | |
864 // method? | |
865 bool ciMethod::break_at_execute() { | |
866 check_is_loaded(); | |
867 VM_ENTRY_MARK; | |
868 methodHandle mh(THREAD, get_methodOop()); | |
869 return CompilerOracle::should_break_at(mh); | |
870 } | |
871 | |
872 // ------------------------------------------------------------------ | |
873 // ciMethod::has_option | |
874 // | |
875 bool ciMethod::has_option(const char* option) { | |
876 check_is_loaded(); | |
877 VM_ENTRY_MARK; | |
878 methodHandle mh(THREAD, get_methodOop()); | |
879 return CompilerOracle::has_option_string(mh, option); | |
880 } | |
881 | |
882 // ------------------------------------------------------------------ | |
883 // ciMethod::can_be_compiled | |
884 // | |
885 // Have previous compilations of this method succeeded? | |
886 bool ciMethod::can_be_compiled() { | |
887 check_is_loaded(); | |
888 return _is_compilable; | |
889 } | |
890 | |
891 // ------------------------------------------------------------------ | |
892 // ciMethod::set_not_compilable | |
893 // | |
894 // Tell the VM that this method cannot be compiled at all. | |
895 void ciMethod::set_not_compilable() { | |
896 check_is_loaded(); | |
897 VM_ENTRY_MARK; | |
898 _is_compilable = false; | |
899 get_methodOop()->set_not_compilable(); | |
900 } | |
901 | |
902 // ------------------------------------------------------------------ | |
903 // ciMethod::can_be_osr_compiled | |
904 // | |
905 // Have previous compilations of this method succeeded? | |
906 // | |
907 // Implementation note: the VM does not currently keep track | |
908 // of failed OSR compilations per bci. The entry_bci parameter | |
909 // is currently unused. | |
910 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
911 check_is_loaded(); | |
912 VM_ENTRY_MARK; | |
913 return !get_methodOop()->access_flags().is_not_osr_compilable(); | |
914 } | |
915 | |
916 // ------------------------------------------------------------------ | |
917 // ciMethod::has_compiled_code | |
918 bool ciMethod::has_compiled_code() { | |
919 VM_ENTRY_MARK; | |
920 return get_methodOop()->code() != NULL; | |
921 } | |
922 | |
923 // ------------------------------------------------------------------ | |
924 // ciMethod::instructions_size | |
1748 | 925 // |
926 // This is a rough metric for "fat" methods, compared before inlining | |
927 // with InlineSmallCode. The CodeBlob::code_size accessor includes | |
928 // junk like exception handler, stubs, and constant table, which are | |
929 // not highly relevant to an inlined method. So we use the more | |
930 // specific accessor nmethod::insts_size. | |
0 | 931 int ciMethod::instructions_size() { |
932 GUARDED_VM_ENTRY( | |
933 nmethod* code = get_methodOop()->code(); | |
934 // if there's no compiled code or the code was produced by the | |
935 // tier1 profiler return 0 for the code size. This should | |
936 // probably be based on the compilation level of the nmethod but | |
937 // that currently isn't properly recorded. | |
938 if (code == NULL || | |
939 (TieredCompilation && code->compiler() != NULL && code->compiler()->is_c1())) { | |
940 return 0; | |
941 } | |
1748 | 942 return code->insts_end() - code->verified_entry_point(); |
0 | 943 ) |
944 } | |
945 | |
946 // ------------------------------------------------------------------ | |
947 // ciMethod::log_nmethod_identity | |
948 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
949 GUARDED_VM_ENTRY( | |
950 nmethod* code = get_methodOop()->code(); | |
951 if (code != NULL) { | |
952 code->log_identity(log); | |
953 } | |
954 ) | |
955 } | |
956 | |
957 // ------------------------------------------------------------------ | |
958 // ciMethod::is_not_reached | |
959 bool ciMethod::is_not_reached(int bci) { | |
960 check_is_loaded(); | |
961 VM_ENTRY_MARK; | |
962 return Interpreter::is_not_reached( | |
963 methodHandle(THREAD, get_methodOop()), bci); | |
964 } | |
965 | |
966 // ------------------------------------------------------------------ | |
967 // ciMethod::was_never_executed | |
968 bool ciMethod::was_executed_more_than(int times) { | |
969 VM_ENTRY_MARK; | |
970 return get_methodOop()->was_executed_more_than(times); | |
971 } | |
972 | |
973 // ------------------------------------------------------------------ | |
974 // ciMethod::has_unloaded_classes_in_signature | |
975 bool ciMethod::has_unloaded_classes_in_signature() { | |
976 VM_ENTRY_MARK; | |
977 { | |
978 EXCEPTION_MARK; | |
979 methodHandle m(THREAD, get_methodOop()); | |
980 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); | |
981 if( HAS_PENDING_EXCEPTION ) { | |
982 CLEAR_PENDING_EXCEPTION; | |
983 return true; // Declare that we may have unloaded classes | |
984 } | |
985 return has_unloaded; | |
986 } | |
987 } | |
988 | |
989 // ------------------------------------------------------------------ | |
990 // ciMethod::is_klass_loaded | |
991 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
992 VM_ENTRY_MARK; | |
993 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved); | |
994 } | |
995 | |
996 // ------------------------------------------------------------------ | |
997 // ciMethod::check_call | |
998 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
999 VM_ENTRY_MARK; | |
1000 { | |
1001 EXCEPTION_MARK; | |
1002 HandleMark hm(THREAD); | |
1003 constantPoolHandle pool (THREAD, get_methodOop()->constants()); | |
1004 methodHandle spec_method; | |
1005 KlassHandle spec_klass; | |
1006 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD); | |
1007 if (HAS_PENDING_EXCEPTION) { | |
1008 CLEAR_PENDING_EXCEPTION; | |
1009 return false; | |
1010 } else { | |
1011 return (spec_method->is_static() == is_static); | |
1012 } | |
1013 } | |
1014 return false; | |
1015 } | |
1016 | |
1017 // ------------------------------------------------------------------ | |
1018 // ciMethod::print_codes | |
1019 // | |
1020 // Print the bytecodes for this method. | |
1021 void ciMethod::print_codes_on(outputStream* st) { | |
1022 check_is_loaded(); | |
1023 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);) | |
1024 } | |
1025 | |
1026 | |
1027 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
1028 check_is_loaded(); \ | |
1029 VM_ENTRY_MARK; \ | |
1030 return get_methodOop()->flag_accessor(); \ | |
1031 } | |
1032 | |
1033 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
1034 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
1035 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
1036 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
1037 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
1038 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
1039 | |
1040 BCEscapeAnalyzer *ciMethod::get_bcea() { | |
1648
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1041 #ifdef COMPILER2 |
0 | 1042 if (_bcea == NULL) { |
1043 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
1044 } | |
1045 return _bcea; | |
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1046 #else // COMPILER2 |
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1047 ShouldNotReachHere(); |
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1048 return NULL; |
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1049 #endif // COMPILER2 |
0 | 1050 } |
1051 | |
1052 ciMethodBlocks *ciMethod::get_method_blocks() { | |
1053 Arena *arena = CURRENT_ENV->arena(); | |
1054 if (_method_blocks == NULL) { | |
1055 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
1056 } | |
1057 return _method_blocks; | |
1058 } | |
1059 | |
1060 #undef FETCH_FLAG_FROM_VM | |
1061 | |
1062 | |
1063 // ------------------------------------------------------------------ | |
1064 // ciMethod::print_codes | |
1065 // | |
1066 // Print a range of the bytecodes for this method. | |
1067 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1068 check_is_loaded(); | |
1069 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);) | |
1070 } | |
1071 | |
1072 // ------------------------------------------------------------------ | |
1073 // ciMethod::print_name | |
1074 // | |
1075 // Print the name of this method, including signature and some flags. | |
1076 void ciMethod::print_name(outputStream* st) { | |
1077 check_is_loaded(); | |
1078 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);) | |
1079 } | |
1080 | |
1081 // ------------------------------------------------------------------ | |
1082 // ciMethod::print_short_name | |
1083 // | |
1084 // Print the name of this method, without signature. | |
1085 void ciMethod::print_short_name(outputStream* st) { | |
1086 check_is_loaded(); | |
1087 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);) | |
1088 } | |
1089 | |
1090 // ------------------------------------------------------------------ | |
1091 // ciMethod::print_impl | |
1092 // | |
1093 // Implementation of the print method. | |
1094 void ciMethod::print_impl(outputStream* st) { | |
1095 ciObject::print_impl(st); | |
1096 st->print(" name="); | |
1097 name()->print_symbol_on(st); | |
1098 st->print(" holder="); | |
1099 holder()->print_name_on(st); | |
1100 st->print(" signature="); | |
1101 signature()->as_symbol()->print_symbol_on(st); | |
1102 if (is_loaded()) { | |
1103 st->print(" loaded=true flags="); | |
1104 flags().print_member_flags(st); | |
1105 } else { | |
1106 st->print(" loaded=false"); | |
1107 } | |
1108 } |