Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.cpp @ 1645:3941674cc7fa
6958668: repeated uncommon trapping for new of klass which is being initialized
Reviewed-by: kvn, jrose
author | never |
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date | Mon, 12 Jul 2010 10:58:25 -0700 |
parents | e9ff18c4ace7 |
children | 8099e71601df |
rev | line source |
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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 _bcea = NULL; | |
58 _method_blocks = NULL; | |
59 #ifdef COMPILER2 | |
60 _flow = NULL; | |
61 #endif // COMPILER2 | |
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 _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 | |
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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 // ------------------------------------------------------------------ | |
991 | 328 // ciMethod::raw_liveness_at_bci |
0 | 329 // |
330 // Which local variables are live at a specific bci? | |
991 | 331 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
0 | 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 } | |
991 | 339 return _liveness->get_liveness_at(bci); |
340 } | |
341 | |
342 // ------------------------------------------------------------------ | |
343 // ciMethod::liveness_at_bci | |
344 // | |
345 // Which local variables are live at a specific bci? When debugging | |
346 // will return true for all locals in some cases to improve debug | |
347 // information. | |
348 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
349 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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350 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { |
0 | 351 // Keep all locals live for the user's edification and amusement. |
352 result.at_put_range(0, result.size(), true); | |
353 } | |
354 return result; | |
355 } | |
356 | |
357 // ciMethod::live_local_oops_at_bci | |
358 // | |
359 // find all the live oops in the locals array for a particular bci | |
360 // Compute what the interpreter believes by using the interpreter | |
361 // oopmap generator. This is used as a double check during osr to | |
362 // guard against conservative result from MethodLiveness making us | |
363 // think a dead oop is live. MethodLiveness is conservative in the | |
364 // sense that it may consider locals to be live which cannot be live, | |
365 // like in the case where a local could contain an oop or a primitive | |
366 // along different paths. In that case the local must be dead when | |
367 // those paths merge. Since the interpreter's viewpoint is used when | |
368 // gc'ing an interpreter frame we need to use its viewpoint during | |
369 // OSR when loading the locals. | |
370 | |
371 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
372 VM_ENTRY_MARK; | |
373 InterpreterOopMap mask; | |
374 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask); | |
375 int mask_size = max_locals(); | |
376 BitMap result(mask_size); | |
377 result.clear(); | |
378 int i; | |
379 for (i = 0; i < mask_size ; i++ ) { | |
380 if (mask.is_oop(i)) result.set_bit(i); | |
381 } | |
382 return result; | |
383 } | |
384 | |
385 | |
386 #ifdef COMPILER1 | |
387 // ------------------------------------------------------------------ | |
388 // ciMethod::bci_block_start | |
389 // | |
390 // Marks all bcis where a new basic block starts | |
391 const BitMap ciMethod::bci_block_start() { | |
392 check_is_loaded(); | |
393 if (_liveness == NULL) { | |
394 // Create the liveness analyzer. | |
395 Arena* arena = CURRENT_ENV->arena(); | |
396 _liveness = new (arena) MethodLiveness(arena, this); | |
397 _liveness->compute_liveness(); | |
398 } | |
399 | |
400 return _liveness->get_bci_block_start(); | |
401 } | |
402 #endif // COMPILER1 | |
403 | |
404 | |
405 // ------------------------------------------------------------------ | |
406 // ciMethod::call_profile_at_bci | |
407 // | |
408 // Get the ciCallProfile for the invocation of this method. | |
409 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
410 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
411 ResourceMark rm; | |
412 ciCallProfile result; | |
413 if (method_data() != NULL && method_data()->is_mature()) { | |
414 ciProfileData* data = method_data()->bci_to_data(bci); | |
415 if (data != NULL && data->is_CounterData()) { | |
416 // Every profiled call site has a counter. | |
417 int count = data->as_CounterData()->count(); | |
418 | |
419 if (!data->is_ReceiverTypeData()) { | |
420 result._receiver_count[0] = 0; // that's a definite zero | |
421 } else { // ReceiverTypeData is a subclass of CounterData | |
422 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
423 // In addition, virtual call sites have receiver type information | |
424 int receivers_count_total = 0; | |
425 int morphism = 0; | |
426 for (uint i = 0; i < call->row_limit(); i++) { | |
427 ciKlass* receiver = call->receiver(i); | |
428 if (receiver == NULL) continue; | |
429 morphism += 1; | |
430 int rcount = call->receiver_count(i); | |
431 if (rcount == 0) rcount = 1; // Should be valid value | |
432 receivers_count_total += rcount; | |
433 // Add the receiver to result data. | |
434 result.add_receiver(receiver, rcount); | |
435 // If we extend profiling to record methods, | |
436 // we will set result._method also. | |
437 } | |
438 // Determine call site's morphism. | |
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439 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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440 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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441 // The call site count is > 0 in the case of a polymorphic virtual call. |
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442 if (morphism > 0 && morphism == result._limit) { |
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443 // The morphism <= MorphismLimit. |
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444 if ((morphism < ciCallProfile::MorphismLimit) || |
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445 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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446 #ifdef ASSERT |
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447 if (count > 0) { |
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448 this->print_short_name(tty); |
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449 tty->print_cr(" @ bci:%d", bci); |
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450 this->print_codes(); |
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451 assert(false, "this call site should not be polymorphic"); |
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452 } |
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453 #endif |
0 | 454 result._morphism = morphism; |
455 } | |
456 } | |
457 // Make the count consistent if this is a call profile. If count is | |
458 // zero or less, presume that this is a typecheck profile and | |
459 // do nothing. Otherwise, increase count to be the sum of all | |
460 // receiver's counts. | |
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461 if (count >= 0) { |
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462 count += receivers_count_total; |
0 | 463 } |
464 } | |
465 result._count = count; | |
466 } | |
467 } | |
468 return result; | |
469 } | |
470 | |
471 // ------------------------------------------------------------------ | |
472 // Add new receiver and sort data by receiver's profile count. | |
473 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
474 // Add new receiver and sort data by receiver's counts when we have space | |
475 // for it otherwise replace the less called receiver (less called receiver | |
476 // is placed to the last array element which is not used). | |
477 // First array's element contains most called receiver. | |
478 int i = _limit; | |
479 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
480 _receiver[i] = _receiver[i-1]; | |
481 _receiver_count[i] = _receiver_count[i-1]; | |
482 } | |
483 _receiver[i] = receiver; | |
484 _receiver_count[i] = receiver_count; | |
485 if (_limit < MorphismLimit) _limit++; | |
486 } | |
487 | |
488 // ------------------------------------------------------------------ | |
489 // ciMethod::find_monomorphic_target | |
490 // | |
491 // Given a certain calling environment, find the monomorphic target | |
492 // for the call. Return NULL if the call is not monomorphic in | |
493 // its calling environment, or if there are only abstract methods. | |
494 // The returned method is never abstract. | |
495 // Note: If caller uses a non-null result, it must inform dependencies | |
496 // via assert_unique_concrete_method or assert_leaf_type. | |
497 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
498 ciInstanceKlass* callee_holder, | |
499 ciInstanceKlass* actual_recv) { | |
500 check_is_loaded(); | |
501 | |
502 if (actual_recv->is_interface()) { | |
503 // %%% We cannot trust interface types, yet. See bug 6312651. | |
504 return NULL; | |
505 } | |
506 | |
507 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
508 if (root_m == NULL) { | |
509 // Something went wrong looking up the actual receiver method. | |
510 return NULL; | |
511 } | |
512 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
513 | |
514 // Make certain quick checks even if UseCHA is false. | |
515 | |
516 // Is it private or final? | |
517 if (root_m->can_be_statically_bound()) { | |
518 return root_m; | |
519 } | |
520 | |
521 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
522 // Easy case. There is no other place to put a method, so don't bother | |
523 // to go through the VM_ENTRY_MARK and all the rest. | |
524 return root_m; | |
525 } | |
526 | |
527 // Array methods (clone, hashCode, etc.) are always statically bound. | |
528 // If we were to see an array type here, we'd return root_m. | |
529 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
530 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
531 // so there is no need to do the same job here. | |
532 | |
533 if (!UseCHA) return NULL; | |
534 | |
535 VM_ENTRY_MARK; | |
536 | |
537 methodHandle target; | |
538 { | |
539 MutexLocker locker(Compile_lock); | |
540 klassOop context = actual_recv->get_klassOop(); | |
541 target = Dependencies::find_unique_concrete_method(context, | |
542 root_m->get_methodOop()); | |
543 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. | |
544 } | |
545 | |
546 #ifndef PRODUCT | |
547 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) { | |
548 tty->print("found a non-root unique target method"); | |
549 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name()); | |
550 tty->print(" method = "); | |
551 target->print_short_name(tty); | |
552 tty->cr(); | |
553 } | |
554 #endif //PRODUCT | |
555 | |
556 if (target() == NULL) { | |
557 return NULL; | |
558 } | |
559 if (target() == root_m->get_methodOop()) { | |
560 return root_m; | |
561 } | |
562 if (!root_m->is_public() && | |
563 !root_m->is_protected()) { | |
564 // If we are going to reason about inheritance, it's easiest | |
565 // if the method in question is public, protected, or private. | |
566 // If the answer is not root_m, it is conservatively correct | |
567 // to return NULL, even if the CHA encountered irrelevant | |
568 // methods in other packages. | |
569 // %%% TO DO: Work out logic for package-private methods | |
570 // with the same name but different vtable indexes. | |
571 return NULL; | |
572 } | |
573 return CURRENT_THREAD_ENV->get_object(target())->as_method(); | |
574 } | |
575 | |
576 // ------------------------------------------------------------------ | |
577 // ciMethod::resolve_invoke | |
578 // | |
579 // Given a known receiver klass, find the target for the call. | |
580 // Return NULL if the call has no target or the target is abstract. | |
581 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
582 check_is_loaded(); | |
583 VM_ENTRY_MARK; | |
584 | |
585 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
586 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop()); | |
587 KlassHandle h_resolved (THREAD, holder()->get_klassOop()); | |
588 symbolHandle h_name (THREAD, name()->get_symbolOop()); | |
589 symbolHandle h_signature (THREAD, signature()->get_symbolOop()); | |
590 | |
591 methodHandle m; | |
592 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
593 // the vtable has not been setup, and the LinkResolver will fail. | |
594 if (h_recv->oop_is_javaArray() | |
595 || | |
596 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { | |
597 if (holder()->is_interface()) { | |
598 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
599 } else { | |
600 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
601 } | |
602 } | |
603 | |
604 if (m.is_null()) { | |
605 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
606 return NULL; | |
607 } | |
608 | |
609 ciMethod* result = this; | |
610 if (m() != get_methodOop()) { | |
611 result = CURRENT_THREAD_ENV->get_object(m())->as_method(); | |
612 } | |
613 | |
614 // Don't return abstract methods because they aren't | |
615 // optimizable or interesting. | |
616 if (result->is_abstract()) { | |
617 return NULL; | |
618 } else { | |
619 return result; | |
620 } | |
621 } | |
622 | |
623 // ------------------------------------------------------------------ | |
624 // ciMethod::resolve_vtable_index | |
625 // | |
626 // Given a known receiver klass, find the vtable index for the call. | |
627 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown. | |
628 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { | |
629 check_is_loaded(); | |
630 | |
631 int vtable_index = methodOopDesc::invalid_vtable_index; | |
632 // Only do lookup if receiver klass has been linked. Otherwise, | |
633 // the vtable has not been setup, and the LinkResolver will fail. | |
634 if (!receiver->is_interface() | |
635 && (!receiver->is_instance_klass() || | |
636 receiver->as_instance_klass()->is_linked())) { | |
637 VM_ENTRY_MARK; | |
638 | |
639 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
640 KlassHandle h_recv (THREAD, receiver->get_klassOop()); | |
641 symbolHandle h_name (THREAD, name()->get_symbolOop()); | |
642 symbolHandle h_signature (THREAD, signature()->get_symbolOop()); | |
643 | |
644 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
645 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
646 // A statically bound method. Return "no such index". | |
647 vtable_index = methodOopDesc::invalid_vtable_index; | |
648 } | |
649 } | |
650 | |
651 return vtable_index; | |
652 } | |
653 | |
654 // ------------------------------------------------------------------ | |
655 // ciMethod::interpreter_call_site_count | |
656 int ciMethod::interpreter_call_site_count(int bci) { | |
657 if (method_data() != NULL) { | |
658 ResourceMark rm; | |
659 ciProfileData* data = method_data()->bci_to_data(bci); | |
660 if (data != NULL && data->is_CounterData()) { | |
661 return scale_count(data->as_CounterData()->count()); | |
662 } | |
663 } | |
664 return -1; // unknown | |
665 } | |
666 | |
667 // ------------------------------------------------------------------ | |
668 // Adjust a CounterData count to be commensurate with | |
669 // interpreter_invocation_count. If the MDO exists for | |
670 // only 25% of the time the method exists, then the | |
671 // counts in the MDO should be scaled by 4X, so that | |
672 // they can be usefully and stably compared against the | |
673 // invocation counts in methods. | |
674 int ciMethod::scale_count(int count, float prof_factor) { | |
675 if (count > 0 && method_data() != NULL) { | |
676 int current_mileage = method_data()->current_mileage(); | |
677 int creation_mileage = method_data()->creation_mileage(); | |
678 int counter_life = current_mileage - creation_mileage; | |
679 int method_life = interpreter_invocation_count(); | |
680 // counter_life due to backedge_counter could be > method_life | |
681 if (counter_life > method_life) | |
682 counter_life = method_life; | |
683 if (0 < counter_life && counter_life <= method_life) { | |
684 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
685 count = (count > 0) ? count : 1; | |
686 } | |
687 } | |
688 return count; | |
689 } | |
690 | |
691 // ------------------------------------------------------------------ | |
710 | 692 // invokedynamic support |
1564 | 693 |
694 // ------------------------------------------------------------------ | |
695 // ciMethod::is_method_handle_invoke | |
710 | 696 // |
1564 | 697 // Return true if the method is a MethodHandle target. |
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698 bool ciMethod::is_method_handle_invoke() const { |
1564 | 699 bool flag = (holder()->name() == ciSymbol::java_dyn_MethodHandle() && |
700 methodOopDesc::is_method_handle_invoke_name(name()->sid())); | |
710 | 701 #ifdef ASSERT |
1564 | 702 if (is_loaded()) { |
703 bool flag2 = ((flags().as_int() & JVM_MH_INVOKE_BITS) == JVM_MH_INVOKE_BITS); | |
704 { | |
705 VM_ENTRY_MARK; | |
706 bool flag3 = get_methodOop()->is_method_handle_invoke(); | |
707 assert(flag2 == flag3, "consistent"); | |
708 assert(flag == flag3, "consistent"); | |
709 } | |
710 | 710 } |
711 #endif //ASSERT | |
712 return flag; | |
713 } | |
714 | |
1564 | 715 // ------------------------------------------------------------------ |
716 // ciMethod::is_method_handle_adapter | |
717 // | |
718 // Return true if the method is a generated MethodHandle adapter. | |
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719 bool ciMethod::is_method_handle_adapter() const { |
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720 check_is_loaded(); |
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721 VM_ENTRY_MARK; |
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722 return get_methodOop()->is_method_handle_adapter(); |
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723 } |
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724 |
710 | 725 ciInstance* ciMethod::method_handle_type() { |
726 check_is_loaded(); | |
727 VM_ENTRY_MARK; | |
728 oop mtype = get_methodOop()->method_handle_type(); | |
729 return CURRENT_THREAD_ENV->get_object(mtype)->as_instance(); | |
730 } | |
731 | |
732 | |
733 // ------------------------------------------------------------------ | |
0 | 734 // ciMethod::build_method_data |
735 // | |
736 // Generate new methodDataOop objects at compile time. | |
737 void ciMethod::build_method_data(methodHandle h_m) { | |
738 EXCEPTION_CONTEXT; | |
739 if (is_native() || is_abstract() || h_m()->is_accessor()) return; | |
740 if (h_m()->method_data() == NULL) { | |
741 methodOopDesc::build_interpreter_method_data(h_m, THREAD); | |
742 if (HAS_PENDING_EXCEPTION) { | |
743 CLEAR_PENDING_EXCEPTION; | |
744 } | |
745 } | |
746 if (h_m()->method_data() != NULL) { | |
747 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
748 _method_data->load_data(); | |
749 } else { | |
750 _method_data = CURRENT_ENV->get_empty_methodData(); | |
751 } | |
752 } | |
753 | |
754 // public, retroactive version | |
755 void ciMethod::build_method_data() { | |
756 if (_method_data == NULL || _method_data->is_empty()) { | |
757 GUARDED_VM_ENTRY({ | |
758 build_method_data(get_methodOop()); | |
759 }); | |
760 } | |
761 } | |
762 | |
763 | |
764 // ------------------------------------------------------------------ | |
765 // ciMethod::method_data | |
766 // | |
767 ciMethodData* ciMethod::method_data() { | |
768 if (_method_data != NULL) { | |
769 return _method_data; | |
770 } | |
771 VM_ENTRY_MARK; | |
772 ciEnv* env = CURRENT_ENV; | |
773 Thread* my_thread = JavaThread::current(); | |
774 methodHandle h_m(my_thread, get_methodOop()); | |
775 | |
776 if (Tier1UpdateMethodData && is_tier1_compile(env->comp_level())) { | |
777 build_method_data(h_m); | |
778 } | |
779 | |
780 if (h_m()->method_data() != NULL) { | |
781 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
782 _method_data->load_data(); | |
783 } else { | |
784 _method_data = CURRENT_ENV->get_empty_methodData(); | |
785 } | |
786 return _method_data; | |
787 | |
788 } | |
789 | |
790 | |
791 // ------------------------------------------------------------------ | |
792 // ciMethod::will_link | |
793 // | |
794 // Will this method link in a specific calling context? | |
795 bool ciMethod::will_link(ciKlass* accessing_klass, | |
796 ciKlass* declared_method_holder, | |
797 Bytecodes::Code bc) { | |
798 if (!is_loaded()) { | |
799 // Method lookup failed. | |
800 return false; | |
801 } | |
802 | |
803 // The link checks have been front-loaded into the get_method | |
804 // call. This method (ciMethod::will_link()) will be removed | |
805 // in the future. | |
806 | |
807 return true; | |
808 } | |
809 | |
810 // ------------------------------------------------------------------ | |
811 // ciMethod::should_exclude | |
812 // | |
813 // Should this method be excluded from compilation? | |
814 bool ciMethod::should_exclude() { | |
815 check_is_loaded(); | |
816 VM_ENTRY_MARK; | |
817 methodHandle mh(THREAD, get_methodOop()); | |
818 bool ignore; | |
819 return CompilerOracle::should_exclude(mh, ignore); | |
820 } | |
821 | |
822 // ------------------------------------------------------------------ | |
823 // ciMethod::should_inline | |
824 // | |
825 // Should this method be inlined during compilation? | |
826 bool ciMethod::should_inline() { | |
827 check_is_loaded(); | |
828 VM_ENTRY_MARK; | |
829 methodHandle mh(THREAD, get_methodOop()); | |
830 return CompilerOracle::should_inline(mh); | |
831 } | |
832 | |
833 // ------------------------------------------------------------------ | |
834 // ciMethod::should_not_inline | |
835 // | |
836 // Should this method be disallowed from inlining during compilation? | |
837 bool ciMethod::should_not_inline() { | |
838 check_is_loaded(); | |
839 VM_ENTRY_MARK; | |
840 methodHandle mh(THREAD, get_methodOop()); | |
841 return CompilerOracle::should_not_inline(mh); | |
842 } | |
843 | |
844 // ------------------------------------------------------------------ | |
845 // ciMethod::should_print_assembly | |
846 // | |
847 // Should the compiler print the generated code for this method? | |
848 bool ciMethod::should_print_assembly() { | |
849 check_is_loaded(); | |
850 VM_ENTRY_MARK; | |
851 methodHandle mh(THREAD, get_methodOop()); | |
852 return CompilerOracle::should_print(mh); | |
853 } | |
854 | |
855 // ------------------------------------------------------------------ | |
856 // ciMethod::break_at_execute | |
857 // | |
858 // Should the compiler insert a breakpoint into the generated code | |
859 // method? | |
860 bool ciMethod::break_at_execute() { | |
861 check_is_loaded(); | |
862 VM_ENTRY_MARK; | |
863 methodHandle mh(THREAD, get_methodOop()); | |
864 return CompilerOracle::should_break_at(mh); | |
865 } | |
866 | |
867 // ------------------------------------------------------------------ | |
868 // ciMethod::has_option | |
869 // | |
870 bool ciMethod::has_option(const char* option) { | |
871 check_is_loaded(); | |
872 VM_ENTRY_MARK; | |
873 methodHandle mh(THREAD, get_methodOop()); | |
874 return CompilerOracle::has_option_string(mh, option); | |
875 } | |
876 | |
877 // ------------------------------------------------------------------ | |
878 // ciMethod::can_be_compiled | |
879 // | |
880 // Have previous compilations of this method succeeded? | |
881 bool ciMethod::can_be_compiled() { | |
882 check_is_loaded(); | |
883 return _is_compilable; | |
884 } | |
885 | |
886 // ------------------------------------------------------------------ | |
887 // ciMethod::set_not_compilable | |
888 // | |
889 // Tell the VM that this method cannot be compiled at all. | |
890 void ciMethod::set_not_compilable() { | |
891 check_is_loaded(); | |
892 VM_ENTRY_MARK; | |
893 _is_compilable = false; | |
894 get_methodOop()->set_not_compilable(); | |
895 } | |
896 | |
897 // ------------------------------------------------------------------ | |
898 // ciMethod::can_be_osr_compiled | |
899 // | |
900 // Have previous compilations of this method succeeded? | |
901 // | |
902 // Implementation note: the VM does not currently keep track | |
903 // of failed OSR compilations per bci. The entry_bci parameter | |
904 // is currently unused. | |
905 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
906 check_is_loaded(); | |
907 VM_ENTRY_MARK; | |
908 return !get_methodOop()->access_flags().is_not_osr_compilable(); | |
909 } | |
910 | |
911 // ------------------------------------------------------------------ | |
912 // ciMethod::has_compiled_code | |
913 bool ciMethod::has_compiled_code() { | |
914 VM_ENTRY_MARK; | |
915 return get_methodOop()->code() != NULL; | |
916 } | |
917 | |
918 // ------------------------------------------------------------------ | |
919 // ciMethod::instructions_size | |
920 // This is a rough metric for "fat" methods, compared | |
921 // before inlining with InlineSmallCode. | |
922 // The CodeBlob::instructions_size accessor includes | |
923 // junk like exception handler, stubs, and constant table, | |
924 // which are not highly relevant to an inlined method. | |
925 // So we use the more specific accessor nmethod::code_size. | |
926 int ciMethod::instructions_size() { | |
927 GUARDED_VM_ENTRY( | |
928 nmethod* code = get_methodOop()->code(); | |
929 // if there's no compiled code or the code was produced by the | |
930 // tier1 profiler return 0 for the code size. This should | |
931 // probably be based on the compilation level of the nmethod but | |
932 // that currently isn't properly recorded. | |
933 if (code == NULL || | |
934 (TieredCompilation && code->compiler() != NULL && code->compiler()->is_c1())) { | |
935 return 0; | |
936 } | |
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937 return code->code_end() - code->verified_entry_point(); |
0 | 938 ) |
939 } | |
940 | |
941 // ------------------------------------------------------------------ | |
942 // ciMethod::log_nmethod_identity | |
943 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
944 GUARDED_VM_ENTRY( | |
945 nmethod* code = get_methodOop()->code(); | |
946 if (code != NULL) { | |
947 code->log_identity(log); | |
948 } | |
949 ) | |
950 } | |
951 | |
952 // ------------------------------------------------------------------ | |
953 // ciMethod::is_not_reached | |
954 bool ciMethod::is_not_reached(int bci) { | |
955 check_is_loaded(); | |
956 VM_ENTRY_MARK; | |
957 return Interpreter::is_not_reached( | |
958 methodHandle(THREAD, get_methodOop()), bci); | |
959 } | |
960 | |
961 // ------------------------------------------------------------------ | |
962 // ciMethod::was_never_executed | |
963 bool ciMethod::was_executed_more_than(int times) { | |
964 VM_ENTRY_MARK; | |
965 return get_methodOop()->was_executed_more_than(times); | |
966 } | |
967 | |
968 // ------------------------------------------------------------------ | |
969 // ciMethod::has_unloaded_classes_in_signature | |
970 bool ciMethod::has_unloaded_classes_in_signature() { | |
971 VM_ENTRY_MARK; | |
972 { | |
973 EXCEPTION_MARK; | |
974 methodHandle m(THREAD, get_methodOop()); | |
975 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); | |
976 if( HAS_PENDING_EXCEPTION ) { | |
977 CLEAR_PENDING_EXCEPTION; | |
978 return true; // Declare that we may have unloaded classes | |
979 } | |
980 return has_unloaded; | |
981 } | |
982 } | |
983 | |
984 // ------------------------------------------------------------------ | |
985 // ciMethod::is_klass_loaded | |
986 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
987 VM_ENTRY_MARK; | |
988 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved); | |
989 } | |
990 | |
991 // ------------------------------------------------------------------ | |
992 // ciMethod::check_call | |
993 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
994 VM_ENTRY_MARK; | |
995 { | |
996 EXCEPTION_MARK; | |
997 HandleMark hm(THREAD); | |
998 constantPoolHandle pool (THREAD, get_methodOop()->constants()); | |
999 methodHandle spec_method; | |
1000 KlassHandle spec_klass; | |
1001 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD); | |
1002 if (HAS_PENDING_EXCEPTION) { | |
1003 CLEAR_PENDING_EXCEPTION; | |
1004 return false; | |
1005 } else { | |
1006 return (spec_method->is_static() == is_static); | |
1007 } | |
1008 } | |
1009 return false; | |
1010 } | |
1011 | |
1012 // ------------------------------------------------------------------ | |
1013 // ciMethod::print_codes | |
1014 // | |
1015 // Print the bytecodes for this method. | |
1016 void ciMethod::print_codes_on(outputStream* st) { | |
1017 check_is_loaded(); | |
1018 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);) | |
1019 } | |
1020 | |
1021 | |
1022 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
1023 check_is_loaded(); \ | |
1024 VM_ENTRY_MARK; \ | |
1025 return get_methodOop()->flag_accessor(); \ | |
1026 } | |
1027 | |
1028 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
1029 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
1030 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
1031 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
1032 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
1033 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
1034 | |
1035 BCEscapeAnalyzer *ciMethod::get_bcea() { | |
1036 if (_bcea == NULL) { | |
1037 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
1038 } | |
1039 return _bcea; | |
1040 } | |
1041 | |
1042 ciMethodBlocks *ciMethod::get_method_blocks() { | |
1043 Arena *arena = CURRENT_ENV->arena(); | |
1044 if (_method_blocks == NULL) { | |
1045 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
1046 } | |
1047 return _method_blocks; | |
1048 } | |
1049 | |
1050 #undef FETCH_FLAG_FROM_VM | |
1051 | |
1052 | |
1053 // ------------------------------------------------------------------ | |
1054 // ciMethod::print_codes | |
1055 // | |
1056 // Print a range of the bytecodes for this method. | |
1057 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1058 check_is_loaded(); | |
1059 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);) | |
1060 } | |
1061 | |
1062 // ------------------------------------------------------------------ | |
1063 // ciMethod::print_name | |
1064 // | |
1065 // Print the name of this method, including signature and some flags. | |
1066 void ciMethod::print_name(outputStream* st) { | |
1067 check_is_loaded(); | |
1068 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);) | |
1069 } | |
1070 | |
1071 // ------------------------------------------------------------------ | |
1072 // ciMethod::print_short_name | |
1073 // | |
1074 // Print the name of this method, without signature. | |
1075 void ciMethod::print_short_name(outputStream* st) { | |
1076 check_is_loaded(); | |
1077 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);) | |
1078 } | |
1079 | |
1080 // ------------------------------------------------------------------ | |
1081 // ciMethod::print_impl | |
1082 // | |
1083 // Implementation of the print method. | |
1084 void ciMethod::print_impl(outputStream* st) { | |
1085 ciObject::print_impl(st); | |
1086 st->print(" name="); | |
1087 name()->print_symbol_on(st); | |
1088 st->print(" holder="); | |
1089 holder()->print_name_on(st); | |
1090 st->print(" signature="); | |
1091 signature()->as_symbol()->print_symbol_on(st); | |
1092 if (is_loaded()) { | |
1093 st->print(" loaded=true flags="); | |
1094 flags().print_member_flags(st); | |
1095 } else { | |
1096 st->print(" loaded=false"); | |
1097 } | |
1098 } |