Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.cpp @ 3763:e66f38dd58a9
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author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | 8033953d67ff |
children | 81d815b05abb |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2011, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/ciCallProfile.hpp" | |
27 #include "ci/ciExceptionHandler.hpp" | |
28 #include "ci/ciInstanceKlass.hpp" | |
29 #include "ci/ciMethod.hpp" | |
30 #include "ci/ciMethodBlocks.hpp" | |
31 #include "ci/ciMethodData.hpp" | |
32 #include "ci/ciMethodKlass.hpp" | |
33 #include "ci/ciStreams.hpp" | |
34 #include "ci/ciSymbol.hpp" | |
35 #include "ci/ciUtilities.hpp" | |
36 #include "classfile/systemDictionary.hpp" | |
37 #include "compiler/abstractCompiler.hpp" | |
38 #include "compiler/compilerOracle.hpp" | |
39 #include "compiler/methodLiveness.hpp" | |
40 #include "interpreter/interpreter.hpp" | |
41 #include "interpreter/linkResolver.hpp" | |
42 #include "interpreter/oopMapCache.hpp" | |
43 #include "memory/allocation.inline.hpp" | |
44 #include "memory/resourceArea.hpp" | |
45 #include "oops/generateOopMap.hpp" | |
46 #include "oops/oop.inline.hpp" | |
47 #include "prims/nativeLookup.hpp" | |
48 #include "runtime/deoptimization.hpp" | |
49 #include "utilities/bitMap.inline.hpp" | |
50 #include "utilities/xmlstream.hpp" | |
51 #ifdef COMPILER2 | |
52 #include "ci/bcEscapeAnalyzer.hpp" | |
53 #include "ci/ciTypeFlow.hpp" | |
54 #include "oops/methodOop.hpp" | |
55 #endif | |
56 #ifdef SHARK | |
57 #include "ci/ciTypeFlow.hpp" | |
58 #include "oops/methodOop.hpp" | |
59 #endif | |
0 | 60 |
61 // ciMethod | |
62 // | |
63 // This class represents a methodOop in the HotSpot virtual | |
64 // machine. | |
65 | |
66 | |
67 // ------------------------------------------------------------------ | |
68 // ciMethod::ciMethod | |
69 // | |
70 // Loaded method. | |
71 ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) { | |
72 assert(h_m() != NULL, "no null method"); | |
73 | |
74 // These fields are always filled in in loaded methods. | |
75 _flags = ciFlags(h_m()->access_flags()); | |
76 | |
77 // Easy to compute, so fill them in now. | |
78 _max_stack = h_m()->max_stack(); | |
79 _max_locals = h_m()->max_locals(); | |
80 _code_size = h_m()->code_size(); | |
81 _intrinsic_id = h_m()->intrinsic_id(); | |
82 _handler_count = h_m()->exception_table()->length() / 4; | |
83 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); | |
84 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); | |
1783 | 85 _is_c1_compilable = !h_m()->is_not_c1_compilable(); |
86 _is_c2_compilable = !h_m()->is_not_c2_compilable(); | |
0 | 87 // Lazy fields, filled in on demand. Require allocation. |
88 _code = NULL; | |
89 _exception_handlers = NULL; | |
90 _liveness = NULL; | |
91 _method_blocks = NULL; | |
1692 | 92 #if defined(COMPILER2) || defined(SHARK) |
0 | 93 _flow = NULL; |
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94 _bcea = NULL; |
1692 | 95 #endif // COMPILER2 || SHARK |
0 | 96 |
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97 ciEnv *env = CURRENT_ENV; |
1783 | 98 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { |
0 | 99 // 6328518 check hotswap conditions under the right lock. |
100 MutexLocker locker(Compile_lock); | |
101 if (Dependencies::check_evol_method(h_m()) != NULL) { | |
1783 | 102 _is_c1_compilable = false; |
103 _is_c2_compilable = false; | |
0 | 104 } |
105 } else { | |
106 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
107 } | |
108 | |
109 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) { | |
110 _can_be_statically_bound = h_m()->can_be_statically_bound(); | |
111 } else { | |
112 // Have to use a conservative value in this case. | |
113 _can_be_statically_bound = false; | |
114 } | |
115 | |
116 // Adjust the definition of this condition to be more useful: | |
117 // %%% take these conditions into account in vtable generation | |
118 if (!_can_be_statically_bound && h_m()->is_private()) | |
119 _can_be_statically_bound = true; | |
120 if (_can_be_statically_bound && h_m()->is_abstract()) | |
121 _can_be_statically_bound = false; | |
122 | |
123 // generating _signature may allow GC and therefore move m. | |
124 // These fields are always filled in. | |
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125 _name = env->get_symbol(h_m()->name()); |
0 | 126 _holder = env->get_object(h_m()->method_holder())->as_instance_klass(); |
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127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); |
0 | 128 _signature = new (env->arena()) ciSignature(_holder, sig_symbol); |
129 _method_data = NULL; | |
130 // Take a snapshot of these values, so they will be commensurate with the MDO. | |
1783 | 131 if (ProfileInterpreter || TieredCompilation) { |
0 | 132 int invcnt = h_m()->interpreter_invocation_count(); |
133 // if the value overflowed report it as max int | |
134 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; | |
135 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); | |
136 } else { | |
137 _interpreter_invocation_count = 0; | |
138 _interpreter_throwout_count = 0; | |
139 } | |
140 if (_interpreter_invocation_count == 0) | |
141 _interpreter_invocation_count = 1; | |
142 } | |
143 | |
144 | |
145 // ------------------------------------------------------------------ | |
146 // ciMethod::ciMethod | |
147 // | |
148 // Unloaded method. | |
149 ciMethod::ciMethod(ciInstanceKlass* holder, | |
150 ciSymbol* name, | |
151 ciSymbol* signature) : ciObject(ciMethodKlass::make()) { | |
152 // These fields are always filled in. | |
153 _name = name; | |
154 _holder = holder; | |
155 _signature = new (CURRENT_ENV->arena()) ciSignature(_holder, signature); | |
156 _intrinsic_id = vmIntrinsics::_none; | |
157 _liveness = NULL; | |
158 _can_be_statically_bound = false; | |
159 _method_blocks = NULL; | |
160 _method_data = NULL; | |
1692 | 161 #if defined(COMPILER2) || defined(SHARK) |
0 | 162 _flow = NULL; |
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163 _bcea = NULL; |
1692 | 164 #endif // COMPILER2 || SHARK |
0 | 165 } |
166 | |
167 | |
168 // ------------------------------------------------------------------ | |
169 // ciMethod::load_code | |
170 // | |
171 // Load the bytecodes and exception handler table for this method. | |
172 void ciMethod::load_code() { | |
173 VM_ENTRY_MARK; | |
174 assert(is_loaded(), "only loaded methods have code"); | |
175 | |
176 methodOop me = get_methodOop(); | |
177 Arena* arena = CURRENT_THREAD_ENV->arena(); | |
178 | |
179 // Load the bytecodes. | |
180 _code = (address)arena->Amalloc(code_size()); | |
181 memcpy(_code, me->code_base(), code_size()); | |
182 | |
183 // Revert any breakpoint bytecodes in ci's copy | |
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184 if (me->number_of_breakpoints() > 0) { |
0 | 185 BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints(); |
186 for (; bp != NULL; bp = bp->next()) { | |
187 if (bp->match(me)) { | |
188 code_at_put(bp->bci(), bp->orig_bytecode()); | |
189 } | |
190 } | |
191 } | |
192 | |
193 // And load the exception table. | |
194 typeArrayOop exc_table = me->exception_table(); | |
195 | |
196 // Allocate one extra spot in our list of exceptions. This | |
197 // last entry will be used to represent the possibility that | |
198 // an exception escapes the method. See ciExceptionHandlerStream | |
199 // for details. | |
200 _exception_handlers = | |
201 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) | |
202 * (_handler_count + 1)); | |
203 if (_handler_count > 0) { | |
204 for (int i=0; i<_handler_count; i++) { | |
205 int base = i*4; | |
206 _exception_handlers[i] = new (arena) ciExceptionHandler( | |
207 holder(), | |
208 /* start */ exc_table->int_at(base), | |
209 /* limit */ exc_table->int_at(base+1), | |
210 /* goto pc */ exc_table->int_at(base+2), | |
211 /* cp index */ exc_table->int_at(base+3)); | |
212 } | |
213 } | |
214 | |
215 // Put an entry at the end of our list to represent the possibility | |
216 // of exceptional exit. | |
217 _exception_handlers[_handler_count] = | |
218 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); | |
219 | |
220 if (CIPrintMethodCodes) { | |
221 print_codes(); | |
222 } | |
223 } | |
224 | |
225 | |
226 // ------------------------------------------------------------------ | |
227 // ciMethod::has_linenumber_table | |
228 // | |
229 // length unknown until decompression | |
230 bool ciMethod::has_linenumber_table() const { | |
231 check_is_loaded(); | |
232 VM_ENTRY_MARK; | |
233 return get_methodOop()->has_linenumber_table(); | |
234 } | |
235 | |
236 | |
237 // ------------------------------------------------------------------ | |
238 // ciMethod::compressed_linenumber_table | |
239 u_char* ciMethod::compressed_linenumber_table() const { | |
240 check_is_loaded(); | |
241 VM_ENTRY_MARK; | |
242 return get_methodOop()->compressed_linenumber_table(); | |
243 } | |
244 | |
245 | |
246 // ------------------------------------------------------------------ | |
247 // ciMethod::line_number_from_bci | |
248 int ciMethod::line_number_from_bci(int bci) const { | |
249 check_is_loaded(); | |
250 VM_ENTRY_MARK; | |
251 return get_methodOop()->line_number_from_bci(bci); | |
252 } | |
253 | |
254 | |
255 // ------------------------------------------------------------------ | |
256 // ciMethod::vtable_index | |
257 // | |
258 // Get the position of this method's entry in the vtable, if any. | |
259 int ciMethod::vtable_index() { | |
260 check_is_loaded(); | |
261 assert(holder()->is_linked(), "must be linked"); | |
262 VM_ENTRY_MARK; | |
263 return get_methodOop()->vtable_index(); | |
264 } | |
265 | |
266 | |
1692 | 267 #ifdef SHARK |
268 // ------------------------------------------------------------------ | |
269 // ciMethod::itable_index | |
270 // | |
271 // Get the position of this method's entry in the itable, if any. | |
272 int ciMethod::itable_index() { | |
273 check_is_loaded(); | |
274 assert(holder()->is_linked(), "must be linked"); | |
275 VM_ENTRY_MARK; | |
276 return klassItable::compute_itable_index(get_methodOop()); | |
277 } | |
278 #endif // SHARK | |
279 | |
280 | |
0 | 281 // ------------------------------------------------------------------ |
282 // ciMethod::native_entry | |
283 // | |
284 // Get the address of this method's native code, if any. | |
285 address ciMethod::native_entry() { | |
286 check_is_loaded(); | |
287 assert(flags().is_native(), "must be native method"); | |
288 VM_ENTRY_MARK; | |
289 methodOop method = get_methodOop(); | |
290 address entry = method->native_function(); | |
291 assert(entry != NULL, "must be valid entry point"); | |
292 return entry; | |
293 } | |
294 | |
295 | |
296 // ------------------------------------------------------------------ | |
297 // ciMethod::interpreter_entry | |
298 // | |
299 // Get the entry point for running this method in the interpreter. | |
300 address ciMethod::interpreter_entry() { | |
301 check_is_loaded(); | |
302 VM_ENTRY_MARK; | |
303 methodHandle mh(THREAD, get_methodOop()); | |
304 return Interpreter::entry_for_method(mh); | |
305 } | |
306 | |
307 | |
308 // ------------------------------------------------------------------ | |
309 // ciMethod::uses_balanced_monitors | |
310 // | |
311 // Does this method use monitors in a strict stack-disciplined manner? | |
312 bool ciMethod::has_balanced_monitors() { | |
313 check_is_loaded(); | |
314 if (_balanced_monitors) return true; | |
315 | |
316 // Analyze the method to see if monitors are used properly. | |
317 VM_ENTRY_MARK; | |
318 methodHandle method(THREAD, get_methodOop()); | |
319 assert(method->has_monitor_bytecodes(), "should have checked this"); | |
320 | |
321 // Check to see if a previous compilation computed the | |
322 // monitor-matching analysis. | |
323 if (method->guaranteed_monitor_matching()) { | |
324 _balanced_monitors = true; | |
325 return true; | |
326 } | |
327 | |
328 { | |
329 EXCEPTION_MARK; | |
330 ResourceMark rm(THREAD); | |
331 GeneratePairingInfo gpi(method); | |
332 gpi.compute_map(CATCH); | |
333 if (!gpi.monitor_safe()) { | |
334 return false; | |
335 } | |
336 method->set_guaranteed_monitor_matching(); | |
337 _balanced_monitors = true; | |
338 } | |
339 return true; | |
340 } | |
341 | |
342 | |
343 // ------------------------------------------------------------------ | |
344 // ciMethod::get_flow_analysis | |
345 ciTypeFlow* ciMethod::get_flow_analysis() { | |
1692 | 346 #if defined(COMPILER2) || defined(SHARK) |
0 | 347 if (_flow == NULL) { |
348 ciEnv* env = CURRENT_ENV; | |
349 _flow = new (env->arena()) ciTypeFlow(env, this); | |
350 _flow->do_flow(); | |
351 } | |
352 return _flow; | |
1692 | 353 #else // COMPILER2 || SHARK |
0 | 354 ShouldNotReachHere(); |
355 return NULL; | |
1692 | 356 #endif // COMPILER2 || SHARK |
0 | 357 } |
358 | |
359 | |
360 // ------------------------------------------------------------------ | |
361 // ciMethod::get_osr_flow_analysis | |
362 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
1692 | 363 #if defined(COMPILER2) || defined(SHARK) |
0 | 364 // OSR entry points are always place after a call bytecode of some sort |
365 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
366 ciEnv* env = CURRENT_ENV; | |
367 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
368 flow->do_flow(); | |
369 return flow; | |
1692 | 370 #else // COMPILER2 || SHARK |
0 | 371 ShouldNotReachHere(); |
372 return NULL; | |
1692 | 373 #endif // COMPILER2 || SHARK |
0 | 374 } |
375 | |
376 // ------------------------------------------------------------------ | |
991 | 377 // ciMethod::raw_liveness_at_bci |
0 | 378 // |
379 // Which local variables are live at a specific bci? | |
991 | 380 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
0 | 381 check_is_loaded(); |
382 if (_liveness == NULL) { | |
383 // Create the liveness analyzer. | |
384 Arena* arena = CURRENT_ENV->arena(); | |
385 _liveness = new (arena) MethodLiveness(arena, this); | |
386 _liveness->compute_liveness(); | |
387 } | |
991 | 388 return _liveness->get_liveness_at(bci); |
389 } | |
390 | |
391 // ------------------------------------------------------------------ | |
392 // ciMethod::liveness_at_bci | |
393 // | |
394 // Which local variables are live at a specific bci? When debugging | |
395 // will return true for all locals in some cases to improve debug | |
396 // information. | |
397 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
398 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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399 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { |
0 | 400 // Keep all locals live for the user's edification and amusement. |
401 result.at_put_range(0, result.size(), true); | |
402 } | |
403 return result; | |
404 } | |
405 | |
406 // ciMethod::live_local_oops_at_bci | |
407 // | |
408 // find all the live oops in the locals array for a particular bci | |
409 // Compute what the interpreter believes by using the interpreter | |
410 // oopmap generator. This is used as a double check during osr to | |
411 // guard against conservative result from MethodLiveness making us | |
412 // think a dead oop is live. MethodLiveness is conservative in the | |
413 // sense that it may consider locals to be live which cannot be live, | |
414 // like in the case where a local could contain an oop or a primitive | |
415 // along different paths. In that case the local must be dead when | |
416 // those paths merge. Since the interpreter's viewpoint is used when | |
417 // gc'ing an interpreter frame we need to use its viewpoint during | |
418 // OSR when loading the locals. | |
419 | |
420 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
421 VM_ENTRY_MARK; | |
422 InterpreterOopMap mask; | |
423 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask); | |
424 int mask_size = max_locals(); | |
425 BitMap result(mask_size); | |
426 result.clear(); | |
427 int i; | |
428 for (i = 0; i < mask_size ; i++ ) { | |
429 if (mask.is_oop(i)) result.set_bit(i); | |
430 } | |
431 return result; | |
432 } | |
433 | |
434 | |
435 #ifdef COMPILER1 | |
436 // ------------------------------------------------------------------ | |
437 // ciMethod::bci_block_start | |
438 // | |
439 // Marks all bcis where a new basic block starts | |
440 const BitMap ciMethod::bci_block_start() { | |
441 check_is_loaded(); | |
442 if (_liveness == NULL) { | |
443 // Create the liveness analyzer. | |
444 Arena* arena = CURRENT_ENV->arena(); | |
445 _liveness = new (arena) MethodLiveness(arena, this); | |
446 _liveness->compute_liveness(); | |
447 } | |
448 | |
449 return _liveness->get_bci_block_start(); | |
450 } | |
451 #endif // COMPILER1 | |
452 | |
453 | |
454 // ------------------------------------------------------------------ | |
455 // ciMethod::call_profile_at_bci | |
456 // | |
457 // Get the ciCallProfile for the invocation of this method. | |
458 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
459 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
460 ResourceMark rm; | |
461 ciCallProfile result; | |
462 if (method_data() != NULL && method_data()->is_mature()) { | |
463 ciProfileData* data = method_data()->bci_to_data(bci); | |
464 if (data != NULL && data->is_CounterData()) { | |
465 // Every profiled call site has a counter. | |
466 int count = data->as_CounterData()->count(); | |
467 | |
468 if (!data->is_ReceiverTypeData()) { | |
469 result._receiver_count[0] = 0; // that's a definite zero | |
470 } else { // ReceiverTypeData is a subclass of CounterData | |
471 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
472 // In addition, virtual call sites have receiver type information | |
473 int receivers_count_total = 0; | |
474 int morphism = 0; | |
1783 | 475 // Precompute morphism for the possible fixup |
0 | 476 for (uint i = 0; i < call->row_limit(); i++) { |
477 ciKlass* receiver = call->receiver(i); | |
478 if (receiver == NULL) continue; | |
1783 | 479 morphism++; |
480 } | |
481 int epsilon = 0; | |
482 if (TieredCompilation && ProfileInterpreter) { | |
483 // Interpreter and C1 treat final and special invokes differently. | |
484 // C1 will record a type, whereas the interpreter will just | |
485 // increment the count. Detect this case. | |
486 if (morphism == 1 && count > 0) { | |
487 epsilon = count; | |
488 count = 0; | |
489 } | |
490 } | |
491 for (uint i = 0; i < call->row_limit(); i++) { | |
492 ciKlass* receiver = call->receiver(i); | |
493 if (receiver == NULL) continue; | |
494 int rcount = call->receiver_count(i) + epsilon; | |
0 | 495 if (rcount == 0) rcount = 1; // Should be valid value |
496 receivers_count_total += rcount; | |
497 // Add the receiver to result data. | |
498 result.add_receiver(receiver, rcount); | |
499 // If we extend profiling to record methods, | |
500 // we will set result._method also. | |
501 } | |
502 // Determine call site's morphism. | |
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503 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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504 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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505 // The call site count is > 0 in the case of a polymorphic virtual call. |
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506 if (morphism > 0 && morphism == result._limit) { |
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507 // The morphism <= MorphismLimit. |
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508 if ((morphism < ciCallProfile::MorphismLimit) || |
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509 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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510 #ifdef ASSERT |
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511 if (count > 0) { |
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512 this->print_short_name(tty); |
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513 tty->print_cr(" @ bci:%d", bci); |
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514 this->print_codes(); |
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515 assert(false, "this call site should not be polymorphic"); |
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516 } |
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517 #endif |
0 | 518 result._morphism = morphism; |
519 } | |
520 } | |
521 // Make the count consistent if this is a call profile. If count is | |
522 // zero or less, presume that this is a typecheck profile and | |
523 // do nothing. Otherwise, increase count to be the sum of all | |
524 // receiver's counts. | |
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525 if (count >= 0) { |
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526 count += receivers_count_total; |
0 | 527 } |
528 } | |
529 result._count = count; | |
530 } | |
531 } | |
532 return result; | |
533 } | |
534 | |
535 // ------------------------------------------------------------------ | |
536 // Add new receiver and sort data by receiver's profile count. | |
537 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
538 // Add new receiver and sort data by receiver's counts when we have space | |
539 // for it otherwise replace the less called receiver (less called receiver | |
540 // is placed to the last array element which is not used). | |
541 // First array's element contains most called receiver. | |
542 int i = _limit; | |
543 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
544 _receiver[i] = _receiver[i-1]; | |
545 _receiver_count[i] = _receiver_count[i-1]; | |
546 } | |
547 _receiver[i] = receiver; | |
548 _receiver_count[i] = receiver_count; | |
549 if (_limit < MorphismLimit) _limit++; | |
550 } | |
551 | |
552 // ------------------------------------------------------------------ | |
553 // ciMethod::find_monomorphic_target | |
554 // | |
555 // Given a certain calling environment, find the monomorphic target | |
556 // for the call. Return NULL if the call is not monomorphic in | |
557 // its calling environment, or if there are only abstract methods. | |
558 // The returned method is never abstract. | |
559 // Note: If caller uses a non-null result, it must inform dependencies | |
560 // via assert_unique_concrete_method or assert_leaf_type. | |
561 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
562 ciInstanceKlass* callee_holder, | |
563 ciInstanceKlass* actual_recv) { | |
564 check_is_loaded(); | |
565 | |
566 if (actual_recv->is_interface()) { | |
567 // %%% We cannot trust interface types, yet. See bug 6312651. | |
568 return NULL; | |
569 } | |
570 | |
571 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
572 if (root_m == NULL) { | |
573 // Something went wrong looking up the actual receiver method. | |
574 return NULL; | |
575 } | |
576 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
577 | |
578 // Make certain quick checks even if UseCHA is false. | |
579 | |
580 // Is it private or final? | |
581 if (root_m->can_be_statically_bound()) { | |
582 return root_m; | |
583 } | |
584 | |
585 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
586 // Easy case. There is no other place to put a method, so don't bother | |
587 // to go through the VM_ENTRY_MARK and all the rest. | |
588 return root_m; | |
589 } | |
590 | |
591 // Array methods (clone, hashCode, etc.) are always statically bound. | |
592 // If we were to see an array type here, we'd return root_m. | |
593 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
594 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
595 // so there is no need to do the same job here. | |
596 | |
597 if (!UseCHA) return NULL; | |
598 | |
599 VM_ENTRY_MARK; | |
600 | |
601 methodHandle target; | |
602 { | |
603 MutexLocker locker(Compile_lock); | |
604 klassOop context = actual_recv->get_klassOop(); | |
605 target = Dependencies::find_unique_concrete_method(context, | |
606 root_m->get_methodOop()); | |
607 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. | |
608 } | |
609 | |
610 #ifndef PRODUCT | |
611 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) { | |
612 tty->print("found a non-root unique target method"); | |
613 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name()); | |
614 tty->print(" method = "); | |
615 target->print_short_name(tty); | |
616 tty->cr(); | |
617 } | |
618 #endif //PRODUCT | |
619 | |
620 if (target() == NULL) { | |
621 return NULL; | |
622 } | |
623 if (target() == root_m->get_methodOop()) { | |
624 return root_m; | |
625 } | |
626 if (!root_m->is_public() && | |
627 !root_m->is_protected()) { | |
628 // If we are going to reason about inheritance, it's easiest | |
629 // if the method in question is public, protected, or private. | |
630 // If the answer is not root_m, it is conservatively correct | |
631 // to return NULL, even if the CHA encountered irrelevant | |
632 // methods in other packages. | |
633 // %%% TO DO: Work out logic for package-private methods | |
634 // with the same name but different vtable indexes. | |
635 return NULL; | |
636 } | |
637 return CURRENT_THREAD_ENV->get_object(target())->as_method(); | |
638 } | |
639 | |
640 // ------------------------------------------------------------------ | |
641 // ciMethod::resolve_invoke | |
642 // | |
643 // Given a known receiver klass, find the target for the call. | |
644 // Return NULL if the call has no target or the target is abstract. | |
645 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
646 check_is_loaded(); | |
647 VM_ENTRY_MARK; | |
648 | |
649 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
650 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop()); | |
651 KlassHandle h_resolved (THREAD, holder()->get_klassOop()); | |
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652 Symbol* h_name = name()->get_symbol(); |
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653 Symbol* h_signature = signature()->get_symbol(); |
0 | 654 |
655 methodHandle m; | |
656 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
657 // the vtable has not been setup, and the LinkResolver will fail. | |
658 if (h_recv->oop_is_javaArray() | |
659 || | |
660 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { | |
661 if (holder()->is_interface()) { | |
662 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
663 } else { | |
664 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
665 } | |
666 } | |
667 | |
668 if (m.is_null()) { | |
669 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
670 return NULL; | |
671 } | |
672 | |
673 ciMethod* result = this; | |
674 if (m() != get_methodOop()) { | |
675 result = CURRENT_THREAD_ENV->get_object(m())->as_method(); | |
676 } | |
677 | |
678 // Don't return abstract methods because they aren't | |
679 // optimizable or interesting. | |
680 if (result->is_abstract()) { | |
681 return NULL; | |
682 } else { | |
683 return result; | |
684 } | |
685 } | |
686 | |
687 // ------------------------------------------------------------------ | |
688 // ciMethod::resolve_vtable_index | |
689 // | |
690 // Given a known receiver klass, find the vtable index for the call. | |
691 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown. | |
692 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { | |
693 check_is_loaded(); | |
694 | |
695 int vtable_index = methodOopDesc::invalid_vtable_index; | |
696 // Only do lookup if receiver klass has been linked. Otherwise, | |
697 // the vtable has not been setup, and the LinkResolver will fail. | |
698 if (!receiver->is_interface() | |
699 && (!receiver->is_instance_klass() || | |
700 receiver->as_instance_klass()->is_linked())) { | |
701 VM_ENTRY_MARK; | |
702 | |
703 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
704 KlassHandle h_recv (THREAD, receiver->get_klassOop()); | |
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705 Symbol* h_name = name()->get_symbol(); |
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706 Symbol* h_signature = signature()->get_symbol(); |
0 | 707 |
708 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
709 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
710 // A statically bound method. Return "no such index". | |
711 vtable_index = methodOopDesc::invalid_vtable_index; | |
712 } | |
713 } | |
714 | |
715 return vtable_index; | |
716 } | |
717 | |
718 // ------------------------------------------------------------------ | |
719 // ciMethod::interpreter_call_site_count | |
720 int ciMethod::interpreter_call_site_count(int bci) { | |
721 if (method_data() != NULL) { | |
722 ResourceMark rm; | |
723 ciProfileData* data = method_data()->bci_to_data(bci); | |
724 if (data != NULL && data->is_CounterData()) { | |
725 return scale_count(data->as_CounterData()->count()); | |
726 } | |
727 } | |
728 return -1; // unknown | |
729 } | |
730 | |
731 // ------------------------------------------------------------------ | |
732 // Adjust a CounterData count to be commensurate with | |
733 // interpreter_invocation_count. If the MDO exists for | |
734 // only 25% of the time the method exists, then the | |
735 // counts in the MDO should be scaled by 4X, so that | |
736 // they can be usefully and stably compared against the | |
737 // invocation counts in methods. | |
738 int ciMethod::scale_count(int count, float prof_factor) { | |
739 if (count > 0 && method_data() != NULL) { | |
1783 | 740 int counter_life; |
0 | 741 int method_life = interpreter_invocation_count(); |
1783 | 742 if (TieredCompilation) { |
743 // In tiered the MDO's life is measured directly, so just use the snapshotted counters | |
744 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); | |
745 } else { | |
746 int current_mileage = method_data()->current_mileage(); | |
747 int creation_mileage = method_data()->creation_mileage(); | |
748 counter_life = current_mileage - creation_mileage; | |
749 } | |
750 | |
0 | 751 // counter_life due to backedge_counter could be > method_life |
752 if (counter_life > method_life) | |
753 counter_life = method_life; | |
754 if (0 < counter_life && counter_life <= method_life) { | |
755 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
756 count = (count > 0) ? count : 1; | |
757 } | |
758 } | |
759 return count; | |
760 } | |
761 | |
762 // ------------------------------------------------------------------ | |
710 | 763 // invokedynamic support |
1564 | 764 |
765 // ------------------------------------------------------------------ | |
766 // ciMethod::is_method_handle_invoke | |
710 | 767 // |
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768 // Return true if the method is an instance of one of the two |
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769 // signature-polymorphic MethodHandle methods, invokeExact or invokeGeneric. |
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770 bool ciMethod::is_method_handle_invoke() const { |
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771 if (!is_loaded()) { |
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772 bool flag = (holder()->name() == ciSymbol::java_lang_invoke_MethodHandle() && |
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773 methodOopDesc::is_method_handle_invoke_name(name()->sid())); |
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774 return flag; |
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775 } |
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776 VM_ENTRY_MARK; |
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777 return get_methodOop()->is_method_handle_invoke(); |
710 | 778 } |
779 | |
1564 | 780 // ------------------------------------------------------------------ |
781 // ciMethod::is_method_handle_adapter | |
782 // | |
783 // Return true if the method is a generated MethodHandle adapter. | |
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784 // These are built by MethodHandleCompiler. |
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785 bool ciMethod::is_method_handle_adapter() const { |
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786 if (!is_loaded()) return false; |
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787 VM_ENTRY_MARK; |
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788 return get_methodOop()->is_method_handle_adapter(); |
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789 } |
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790 |
710 | 791 ciInstance* ciMethod::method_handle_type() { |
792 check_is_loaded(); | |
793 VM_ENTRY_MARK; | |
794 oop mtype = get_methodOop()->method_handle_type(); | |
795 return CURRENT_THREAD_ENV->get_object(mtype)->as_instance(); | |
796 } | |
797 | |
798 | |
799 // ------------------------------------------------------------------ | |
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800 // ciMethod::ensure_method_data |
0 | 801 // |
802 // Generate new methodDataOop objects at compile time. | |
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803 // Return true if allocation was successful or no MDO is required. |
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804 bool ciMethod::ensure_method_data(methodHandle h_m) { |
0 | 805 EXCEPTION_CONTEXT; |
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806 if (is_native() || is_abstract() || h_m()->is_accessor()) return true; |
0 | 807 if (h_m()->method_data() == NULL) { |
808 methodOopDesc::build_interpreter_method_data(h_m, THREAD); | |
809 if (HAS_PENDING_EXCEPTION) { | |
810 CLEAR_PENDING_EXCEPTION; | |
811 } | |
812 } | |
813 if (h_m()->method_data() != NULL) { | |
814 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
815 _method_data->load_data(); | |
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816 return true; |
0 | 817 } else { |
818 _method_data = CURRENT_ENV->get_empty_methodData(); | |
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819 return false; |
0 | 820 } |
821 } | |
822 | |
823 // public, retroactive version | |
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824 bool ciMethod::ensure_method_data() { |
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825 bool result = true; |
0 | 826 if (_method_data == NULL || _method_data->is_empty()) { |
827 GUARDED_VM_ENTRY({ | |
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828 result = ensure_method_data(get_methodOop()); |
0 | 829 }); |
830 } | |
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831 return result; |
0 | 832 } |
833 | |
834 | |
835 // ------------------------------------------------------------------ | |
836 // ciMethod::method_data | |
837 // | |
838 ciMethodData* ciMethod::method_data() { | |
839 if (_method_data != NULL) { | |
840 return _method_data; | |
841 } | |
842 VM_ENTRY_MARK; | |
843 ciEnv* env = CURRENT_ENV; | |
844 Thread* my_thread = JavaThread::current(); | |
845 methodHandle h_m(my_thread, get_methodOop()); | |
846 | |
847 if (h_m()->method_data() != NULL) { | |
848 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
849 _method_data->load_data(); | |
850 } else { | |
851 _method_data = CURRENT_ENV->get_empty_methodData(); | |
852 } | |
853 return _method_data; | |
854 | |
855 } | |
856 | |
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857 // ------------------------------------------------------------------ |
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858 // ciMethod::method_data_or_null |
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859 // Returns a pointer to ciMethodData if MDO exists on the VM side, |
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860 // NULL otherwise. |
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861 ciMethodData* ciMethod::method_data_or_null() { |
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862 ciMethodData *md = method_data(); |
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863 if (md->is_empty()) return NULL; |
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864 return md; |
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865 } |
0 | 866 |
867 // ------------------------------------------------------------------ | |
868 // ciMethod::will_link | |
869 // | |
870 // Will this method link in a specific calling context? | |
871 bool ciMethod::will_link(ciKlass* accessing_klass, | |
872 ciKlass* declared_method_holder, | |
873 Bytecodes::Code bc) { | |
874 if (!is_loaded()) { | |
875 // Method lookup failed. | |
876 return false; | |
877 } | |
878 | |
879 // The link checks have been front-loaded into the get_method | |
880 // call. This method (ciMethod::will_link()) will be removed | |
881 // in the future. | |
882 | |
883 return true; | |
884 } | |
885 | |
886 // ------------------------------------------------------------------ | |
887 // ciMethod::should_exclude | |
888 // | |
889 // Should this method be excluded from compilation? | |
890 bool ciMethod::should_exclude() { | |
891 check_is_loaded(); | |
892 VM_ENTRY_MARK; | |
893 methodHandle mh(THREAD, get_methodOop()); | |
894 bool ignore; | |
895 return CompilerOracle::should_exclude(mh, ignore); | |
896 } | |
897 | |
898 // ------------------------------------------------------------------ | |
899 // ciMethod::should_inline | |
900 // | |
901 // Should this method be inlined during compilation? | |
902 bool ciMethod::should_inline() { | |
903 check_is_loaded(); | |
904 VM_ENTRY_MARK; | |
905 methodHandle mh(THREAD, get_methodOop()); | |
906 return CompilerOracle::should_inline(mh); | |
907 } | |
908 | |
909 // ------------------------------------------------------------------ | |
910 // ciMethod::should_not_inline | |
911 // | |
912 // Should this method be disallowed from inlining during compilation? | |
913 bool ciMethod::should_not_inline() { | |
914 check_is_loaded(); | |
915 VM_ENTRY_MARK; | |
916 methodHandle mh(THREAD, get_methodOop()); | |
917 return CompilerOracle::should_not_inline(mh); | |
918 } | |
919 | |
920 // ------------------------------------------------------------------ | |
921 // ciMethod::should_print_assembly | |
922 // | |
923 // Should the compiler print the generated code for this method? | |
924 bool ciMethod::should_print_assembly() { | |
925 check_is_loaded(); | |
926 VM_ENTRY_MARK; | |
927 methodHandle mh(THREAD, get_methodOop()); | |
928 return CompilerOracle::should_print(mh); | |
929 } | |
930 | |
931 // ------------------------------------------------------------------ | |
932 // ciMethod::break_at_execute | |
933 // | |
934 // Should the compiler insert a breakpoint into the generated code | |
935 // method? | |
936 bool ciMethod::break_at_execute() { | |
937 check_is_loaded(); | |
938 VM_ENTRY_MARK; | |
939 methodHandle mh(THREAD, get_methodOop()); | |
940 return CompilerOracle::should_break_at(mh); | |
941 } | |
942 | |
943 // ------------------------------------------------------------------ | |
944 // ciMethod::has_option | |
945 // | |
946 bool ciMethod::has_option(const char* option) { | |
947 check_is_loaded(); | |
948 VM_ENTRY_MARK; | |
949 methodHandle mh(THREAD, get_methodOop()); | |
950 return CompilerOracle::has_option_string(mh, option); | |
951 } | |
952 | |
953 // ------------------------------------------------------------------ | |
954 // ciMethod::can_be_compiled | |
955 // | |
956 // Have previous compilations of this method succeeded? | |
957 bool ciMethod::can_be_compiled() { | |
958 check_is_loaded(); | |
1783 | 959 ciEnv* env = CURRENT_ENV; |
960 if (is_c1_compile(env->comp_level())) { | |
961 return _is_c1_compilable; | |
962 } | |
963 return _is_c2_compilable; | |
0 | 964 } |
965 | |
966 // ------------------------------------------------------------------ | |
967 // ciMethod::set_not_compilable | |
968 // | |
969 // Tell the VM that this method cannot be compiled at all. | |
970 void ciMethod::set_not_compilable() { | |
971 check_is_loaded(); | |
972 VM_ENTRY_MARK; | |
1783 | 973 ciEnv* env = CURRENT_ENV; |
974 if (is_c1_compile(env->comp_level())) { | |
975 _is_c1_compilable = false; | |
976 } else { | |
977 _is_c2_compilable = false; | |
978 } | |
979 get_methodOop()->set_not_compilable(env->comp_level()); | |
0 | 980 } |
981 | |
982 // ------------------------------------------------------------------ | |
983 // ciMethod::can_be_osr_compiled | |
984 // | |
985 // Have previous compilations of this method succeeded? | |
986 // | |
987 // Implementation note: the VM does not currently keep track | |
988 // of failed OSR compilations per bci. The entry_bci parameter | |
989 // is currently unused. | |
990 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
991 check_is_loaded(); | |
992 VM_ENTRY_MARK; | |
1783 | 993 ciEnv* env = CURRENT_ENV; |
994 return !get_methodOop()->is_not_osr_compilable(env->comp_level()); | |
0 | 995 } |
996 | |
997 // ------------------------------------------------------------------ | |
998 // ciMethod::has_compiled_code | |
999 bool ciMethod::has_compiled_code() { | |
1000 VM_ENTRY_MARK; | |
1001 return get_methodOop()->code() != NULL; | |
1002 } | |
1003 | |
1783 | 1004 int ciMethod::comp_level() { |
1005 check_is_loaded(); | |
1006 VM_ENTRY_MARK; | |
1007 nmethod* nm = get_methodOop()->code(); | |
1008 if (nm != NULL) return nm->comp_level(); | |
1009 return 0; | |
1010 } | |
1011 | |
0 | 1012 // ------------------------------------------------------------------ |
1013 // ciMethod::instructions_size | |
1748 | 1014 // |
1015 // This is a rough metric for "fat" methods, compared before inlining | |
1016 // with InlineSmallCode. The CodeBlob::code_size accessor includes | |
1017 // junk like exception handler, stubs, and constant table, which are | |
1018 // not highly relevant to an inlined method. So we use the more | |
1019 // specific accessor nmethod::insts_size. | |
1783 | 1020 int ciMethod::instructions_size(int comp_level) { |
0 | 1021 GUARDED_VM_ENTRY( |
1022 nmethod* code = get_methodOop()->code(); | |
1783 | 1023 if (code != NULL && (comp_level == CompLevel_any || comp_level == code->comp_level())) { |
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1024 return code->insts_end() - code->verified_entry_point(); |
0 | 1025 } |
1783 | 1026 return 0; |
0 | 1027 ) |
1028 } | |
1029 | |
1030 // ------------------------------------------------------------------ | |
1031 // ciMethod::log_nmethod_identity | |
1032 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
1033 GUARDED_VM_ENTRY( | |
1034 nmethod* code = get_methodOop()->code(); | |
1035 if (code != NULL) { | |
1036 code->log_identity(log); | |
1037 } | |
1038 ) | |
1039 } | |
1040 | |
1041 // ------------------------------------------------------------------ | |
1042 // ciMethod::is_not_reached | |
1043 bool ciMethod::is_not_reached(int bci) { | |
1044 check_is_loaded(); | |
1045 VM_ENTRY_MARK; | |
1046 return Interpreter::is_not_reached( | |
1047 methodHandle(THREAD, get_methodOop()), bci); | |
1048 } | |
1049 | |
1050 // ------------------------------------------------------------------ | |
1051 // ciMethod::was_never_executed | |
1052 bool ciMethod::was_executed_more_than(int times) { | |
1053 VM_ENTRY_MARK; | |
1054 return get_methodOop()->was_executed_more_than(times); | |
1055 } | |
1056 | |
1057 // ------------------------------------------------------------------ | |
1058 // ciMethod::has_unloaded_classes_in_signature | |
1059 bool ciMethod::has_unloaded_classes_in_signature() { | |
1060 VM_ENTRY_MARK; | |
1061 { | |
1062 EXCEPTION_MARK; | |
1063 methodHandle m(THREAD, get_methodOop()); | |
1064 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); | |
1065 if( HAS_PENDING_EXCEPTION ) { | |
1066 CLEAR_PENDING_EXCEPTION; | |
1067 return true; // Declare that we may have unloaded classes | |
1068 } | |
1069 return has_unloaded; | |
1070 } | |
1071 } | |
1072 | |
1073 // ------------------------------------------------------------------ | |
1074 // ciMethod::is_klass_loaded | |
1075 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
1076 VM_ENTRY_MARK; | |
1077 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved); | |
1078 } | |
1079 | |
1080 // ------------------------------------------------------------------ | |
1081 // ciMethod::check_call | |
1082 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
1083 VM_ENTRY_MARK; | |
1084 { | |
1085 EXCEPTION_MARK; | |
1086 HandleMark hm(THREAD); | |
1087 constantPoolHandle pool (THREAD, get_methodOop()->constants()); | |
1088 methodHandle spec_method; | |
1089 KlassHandle spec_klass; | |
1090 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD); | |
1091 if (HAS_PENDING_EXCEPTION) { | |
1092 CLEAR_PENDING_EXCEPTION; | |
1093 return false; | |
1094 } else { | |
1095 return (spec_method->is_static() == is_static); | |
1096 } | |
1097 } | |
1098 return false; | |
1099 } | |
1100 | |
1101 // ------------------------------------------------------------------ | |
1102 // ciMethod::print_codes | |
1103 // | |
1104 // Print the bytecodes for this method. | |
1105 void ciMethod::print_codes_on(outputStream* st) { | |
1106 check_is_loaded(); | |
1107 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);) | |
1108 } | |
1109 | |
1110 | |
1111 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
1112 check_is_loaded(); \ | |
1113 VM_ENTRY_MARK; \ | |
1114 return get_methodOop()->flag_accessor(); \ | |
1115 } | |
1116 | |
1117 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
1118 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
1119 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
1120 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
1121 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
1122 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
1123 | |
1124 BCEscapeAnalyzer *ciMethod::get_bcea() { | |
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1125 #ifdef COMPILER2 |
0 | 1126 if (_bcea == NULL) { |
1127 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
1128 } | |
1129 return _bcea; | |
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1130 #else // COMPILER2 |
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1131 ShouldNotReachHere(); |
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1132 return NULL; |
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1133 #endif // COMPILER2 |
0 | 1134 } |
1135 | |
1136 ciMethodBlocks *ciMethod::get_method_blocks() { | |
1137 Arena *arena = CURRENT_ENV->arena(); | |
1138 if (_method_blocks == NULL) { | |
1139 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
1140 } | |
1141 return _method_blocks; | |
1142 } | |
1143 | |
1144 #undef FETCH_FLAG_FROM_VM | |
1145 | |
1146 | |
1147 // ------------------------------------------------------------------ | |
1148 // ciMethod::print_codes | |
1149 // | |
1150 // Print a range of the bytecodes for this method. | |
1151 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1152 check_is_loaded(); | |
1153 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);) | |
1154 } | |
1155 | |
1156 // ------------------------------------------------------------------ | |
1157 // ciMethod::print_name | |
1158 // | |
1159 // Print the name of this method, including signature and some flags. | |
1160 void ciMethod::print_name(outputStream* st) { | |
1161 check_is_loaded(); | |
1162 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);) | |
1163 } | |
1164 | |
1165 // ------------------------------------------------------------------ | |
1166 // ciMethod::print_short_name | |
1167 // | |
1168 // Print the name of this method, without signature. | |
1169 void ciMethod::print_short_name(outputStream* st) { | |
1170 check_is_loaded(); | |
1171 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);) | |
1172 } | |
1173 | |
1174 // ------------------------------------------------------------------ | |
1175 // ciMethod::print_impl | |
1176 // | |
1177 // Implementation of the print method. | |
1178 void ciMethod::print_impl(outputStream* st) { | |
1179 ciObject::print_impl(st); | |
1180 st->print(" name="); | |
1181 name()->print_symbol_on(st); | |
1182 st->print(" holder="); | |
1183 holder()->print_name_on(st); | |
1184 st->print(" signature="); | |
1185 signature()->as_symbol()->print_symbol_on(st); | |
1186 if (is_loaded()) { | |
1187 st->print(" loaded=true flags="); | |
1188 flags().print_member_flags(st); | |
1189 } else { | |
1190 st->print(" loaded=false"); | |
1191 } | |
1192 } |