Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.cpp @ 14702:d4dd5204c0aa
Merge
author | ehelin |
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date | Fri, 14 Mar 2014 13:27:18 +0100 |
parents | e65d960c7be5 |
children | b51e29501f30 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2013, 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/ciStreams.hpp" | |
33 #include "ci/ciSymbol.hpp" | |
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34 #include "ci/ciReplay.hpp" |
1972 | 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" | |
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54 #include "oops/method.hpp" |
1972 | 55 #endif |
56 #ifdef SHARK | |
57 #include "ci/ciTypeFlow.hpp" | |
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58 #include "oops/method.hpp" |
1972 | 59 #endif |
0 | 60 |
61 // ciMethod | |
62 // | |
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63 // This class represents a Method* in the HotSpot virtual |
0 | 64 // machine. |
65 | |
66 | |
67 // ------------------------------------------------------------------ | |
68 // ciMethod::ciMethod | |
69 // | |
70 // Loaded method. | |
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71 ciMethod::ciMethod(methodHandle h_m) : ciMetadata(h_m()) { |
0 | 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(); | |
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82 _handler_count = h_m()->exception_table_length(); |
0 | 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 | |
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109 if (h_m()->method_holder()->is_linked()) { |
0 | 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()); |
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126 _holder = env->get_instance_klass(h_m()->method_holder()); |
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127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); |
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128 constantPoolHandle cpool = h_m()->constants(); |
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129 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); |
0 | 130 _method_data = NULL; |
131 // Take a snapshot of these values, so they will be commensurate with the MDO. | |
1783 | 132 if (ProfileInterpreter || TieredCompilation) { |
0 | 133 int invcnt = h_m()->interpreter_invocation_count(); |
134 // if the value overflowed report it as max int | |
135 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; | |
136 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); | |
137 } else { | |
138 _interpreter_invocation_count = 0; | |
139 _interpreter_throwout_count = 0; | |
140 } | |
141 if (_interpreter_invocation_count == 0) | |
142 _interpreter_invocation_count = 1; | |
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143 _instructions_size = -1; |
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144 #ifdef ASSERT |
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145 if (ReplayCompiles) { |
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146 ciReplay::initialize(this); |
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147 } |
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148 #endif |
0 | 149 } |
150 | |
151 | |
152 // ------------------------------------------------------------------ | |
153 // ciMethod::ciMethod | |
154 // | |
155 // Unloaded method. | |
156 ciMethod::ciMethod(ciInstanceKlass* holder, | |
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157 ciSymbol* name, |
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158 ciSymbol* signature, |
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159 ciInstanceKlass* accessor) : |
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160 ciMetadata((Metadata*)NULL), |
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161 _name( name), |
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162 _holder( holder), |
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163 _intrinsic_id( vmIntrinsics::_none), |
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164 _liveness( NULL), |
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165 _can_be_statically_bound(false), |
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166 _method_blocks( NULL), |
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167 _method_data( NULL) |
1692 | 168 #if defined(COMPILER2) || defined(SHARK) |
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169 , |
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170 _flow( NULL), |
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171 _bcea( NULL), |
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172 _instructions_size(-1) |
1692 | 173 #endif // COMPILER2 || SHARK |
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174 { |
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175 // Usually holder and accessor are the same type but in some cases |
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176 // the holder has the wrong class loader (e.g. invokedynamic call |
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177 // sites) so we pass the accessor. |
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178 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); |
0 | 179 } |
180 | |
181 | |
182 // ------------------------------------------------------------------ | |
183 // ciMethod::load_code | |
184 // | |
185 // Load the bytecodes and exception handler table for this method. | |
186 void ciMethod::load_code() { | |
187 VM_ENTRY_MARK; | |
188 assert(is_loaded(), "only loaded methods have code"); | |
189 | |
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190 Method* me = get_Method(); |
0 | 191 Arena* arena = CURRENT_THREAD_ENV->arena(); |
192 | |
193 // Load the bytecodes. | |
194 _code = (address)arena->Amalloc(code_size()); | |
195 memcpy(_code, me->code_base(), code_size()); | |
196 | |
197 // Revert any breakpoint bytecodes in ci's copy | |
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198 if (me->number_of_breakpoints() > 0) { |
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199 BreakpointInfo* bp = me->method_holder()->breakpoints(); |
0 | 200 for (; bp != NULL; bp = bp->next()) { |
201 if (bp->match(me)) { | |
202 code_at_put(bp->bci(), bp->orig_bytecode()); | |
203 } | |
204 } | |
205 } | |
206 | |
207 // And load the exception table. | |
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208 ExceptionTable exc_table(me); |
0 | 209 |
210 // Allocate one extra spot in our list of exceptions. This | |
211 // last entry will be used to represent the possibility that | |
212 // an exception escapes the method. See ciExceptionHandlerStream | |
213 // for details. | |
214 _exception_handlers = | |
215 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) | |
216 * (_handler_count + 1)); | |
217 if (_handler_count > 0) { | |
218 for (int i=0; i<_handler_count; i++) { | |
219 _exception_handlers[i] = new (arena) ciExceptionHandler( | |
220 holder(), | |
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221 /* start */ exc_table.start_pc(i), |
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222 /* limit */ exc_table.end_pc(i), |
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223 /* goto pc */ exc_table.handler_pc(i), |
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224 /* cp index */ exc_table.catch_type_index(i)); |
0 | 225 } |
226 } | |
227 | |
228 // Put an entry at the end of our list to represent the possibility | |
229 // of exceptional exit. | |
230 _exception_handlers[_handler_count] = | |
231 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); | |
232 | |
233 if (CIPrintMethodCodes) { | |
234 print_codes(); | |
235 } | |
236 } | |
237 | |
238 | |
239 // ------------------------------------------------------------------ | |
240 // ciMethod::has_linenumber_table | |
241 // | |
242 // length unknown until decompression | |
243 bool ciMethod::has_linenumber_table() const { | |
244 check_is_loaded(); | |
245 VM_ENTRY_MARK; | |
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246 return get_Method()->has_linenumber_table(); |
0 | 247 } |
248 | |
249 | |
250 // ------------------------------------------------------------------ | |
251 // ciMethod::compressed_linenumber_table | |
252 u_char* ciMethod::compressed_linenumber_table() const { | |
253 check_is_loaded(); | |
254 VM_ENTRY_MARK; | |
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255 return get_Method()->compressed_linenumber_table(); |
0 | 256 } |
257 | |
258 | |
259 // ------------------------------------------------------------------ | |
260 // ciMethod::line_number_from_bci | |
261 int ciMethod::line_number_from_bci(int bci) const { | |
262 check_is_loaded(); | |
263 VM_ENTRY_MARK; | |
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264 return get_Method()->line_number_from_bci(bci); |
0 | 265 } |
266 | |
267 | |
268 // ------------------------------------------------------------------ | |
269 // ciMethod::vtable_index | |
270 // | |
271 // Get the position of this method's entry in the vtable, if any. | |
272 int ciMethod::vtable_index() { | |
273 check_is_loaded(); | |
274 assert(holder()->is_linked(), "must be linked"); | |
275 VM_ENTRY_MARK; | |
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276 return get_Method()->vtable_index(); |
0 | 277 } |
278 | |
279 | |
1692 | 280 #ifdef SHARK |
281 // ------------------------------------------------------------------ | |
282 // ciMethod::itable_index | |
283 // | |
284 // Get the position of this method's entry in the itable, if any. | |
285 int ciMethod::itable_index() { | |
286 check_is_loaded(); | |
287 assert(holder()->is_linked(), "must be linked"); | |
288 VM_ENTRY_MARK; | |
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289 Method* m = get_Method(); |
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290 if (!m->has_itable_index()) |
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291 return Method::nonvirtual_vtable_index; |
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292 return m->itable_index(); |
1692 | 293 } |
294 #endif // SHARK | |
295 | |
296 | |
0 | 297 // ------------------------------------------------------------------ |
298 // ciMethod::native_entry | |
299 // | |
300 // Get the address of this method's native code, if any. | |
301 address ciMethod::native_entry() { | |
302 check_is_loaded(); | |
303 assert(flags().is_native(), "must be native method"); | |
304 VM_ENTRY_MARK; | |
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305 Method* method = get_Method(); |
0 | 306 address entry = method->native_function(); |
307 assert(entry != NULL, "must be valid entry point"); | |
308 return entry; | |
309 } | |
310 | |
311 | |
312 // ------------------------------------------------------------------ | |
313 // ciMethod::interpreter_entry | |
314 // | |
315 // Get the entry point for running this method in the interpreter. | |
316 address ciMethod::interpreter_entry() { | |
317 check_is_loaded(); | |
318 VM_ENTRY_MARK; | |
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319 methodHandle mh(THREAD, get_Method()); |
0 | 320 return Interpreter::entry_for_method(mh); |
321 } | |
322 | |
323 | |
324 // ------------------------------------------------------------------ | |
325 // ciMethod::uses_balanced_monitors | |
326 // | |
327 // Does this method use monitors in a strict stack-disciplined manner? | |
328 bool ciMethod::has_balanced_monitors() { | |
329 check_is_loaded(); | |
330 if (_balanced_monitors) return true; | |
331 | |
332 // Analyze the method to see if monitors are used properly. | |
333 VM_ENTRY_MARK; | |
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334 methodHandle method(THREAD, get_Method()); |
0 | 335 assert(method->has_monitor_bytecodes(), "should have checked this"); |
336 | |
337 // Check to see if a previous compilation computed the | |
338 // monitor-matching analysis. | |
339 if (method->guaranteed_monitor_matching()) { | |
340 _balanced_monitors = true; | |
341 return true; | |
342 } | |
343 | |
344 { | |
345 EXCEPTION_MARK; | |
346 ResourceMark rm(THREAD); | |
347 GeneratePairingInfo gpi(method); | |
348 gpi.compute_map(CATCH); | |
349 if (!gpi.monitor_safe()) { | |
350 return false; | |
351 } | |
352 method->set_guaranteed_monitor_matching(); | |
353 _balanced_monitors = true; | |
354 } | |
355 return true; | |
356 } | |
357 | |
358 | |
359 // ------------------------------------------------------------------ | |
360 // ciMethod::get_flow_analysis | |
361 ciTypeFlow* ciMethod::get_flow_analysis() { | |
1692 | 362 #if defined(COMPILER2) || defined(SHARK) |
0 | 363 if (_flow == NULL) { |
364 ciEnv* env = CURRENT_ENV; | |
365 _flow = new (env->arena()) ciTypeFlow(env, this); | |
366 _flow->do_flow(); | |
367 } | |
368 return _flow; | |
1692 | 369 #else // COMPILER2 || SHARK |
0 | 370 ShouldNotReachHere(); |
371 return NULL; | |
1692 | 372 #endif // COMPILER2 || SHARK |
0 | 373 } |
374 | |
375 | |
376 // ------------------------------------------------------------------ | |
377 // ciMethod::get_osr_flow_analysis | |
378 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
1692 | 379 #if defined(COMPILER2) || defined(SHARK) |
0 | 380 // OSR entry points are always place after a call bytecode of some sort |
381 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
382 ciEnv* env = CURRENT_ENV; | |
383 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
384 flow->do_flow(); | |
385 return flow; | |
1692 | 386 #else // COMPILER2 || SHARK |
0 | 387 ShouldNotReachHere(); |
388 return NULL; | |
1692 | 389 #endif // COMPILER2 || SHARK |
0 | 390 } |
391 | |
392 // ------------------------------------------------------------------ | |
991 | 393 // ciMethod::raw_liveness_at_bci |
0 | 394 // |
395 // Which local variables are live at a specific bci? | |
991 | 396 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
0 | 397 check_is_loaded(); |
398 if (_liveness == NULL) { | |
399 // Create the liveness analyzer. | |
400 Arena* arena = CURRENT_ENV->arena(); | |
401 _liveness = new (arena) MethodLiveness(arena, this); | |
402 _liveness->compute_liveness(); | |
403 } | |
991 | 404 return _liveness->get_liveness_at(bci); |
405 } | |
406 | |
407 // ------------------------------------------------------------------ | |
408 // ciMethod::liveness_at_bci | |
409 // | |
410 // Which local variables are live at a specific bci? When debugging | |
411 // will return true for all locals in some cases to improve debug | |
412 // information. | |
413 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
414 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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415 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) { |
0 | 416 // Keep all locals live for the user's edification and amusement. |
417 result.at_put_range(0, result.size(), true); | |
418 } | |
419 return result; | |
420 } | |
421 | |
422 // ciMethod::live_local_oops_at_bci | |
423 // | |
424 // find all the live oops in the locals array for a particular bci | |
425 // Compute what the interpreter believes by using the interpreter | |
426 // oopmap generator. This is used as a double check during osr to | |
427 // guard against conservative result from MethodLiveness making us | |
428 // think a dead oop is live. MethodLiveness is conservative in the | |
429 // sense that it may consider locals to be live which cannot be live, | |
430 // like in the case where a local could contain an oop or a primitive | |
431 // along different paths. In that case the local must be dead when | |
432 // those paths merge. Since the interpreter's viewpoint is used when | |
433 // gc'ing an interpreter frame we need to use its viewpoint during | |
434 // OSR when loading the locals. | |
435 | |
436 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
437 VM_ENTRY_MARK; | |
438 InterpreterOopMap mask; | |
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439 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); |
0 | 440 int mask_size = max_locals(); |
441 BitMap result(mask_size); | |
442 result.clear(); | |
443 int i; | |
444 for (i = 0; i < mask_size ; i++ ) { | |
445 if (mask.is_oop(i)) result.set_bit(i); | |
446 } | |
447 return result; | |
448 } | |
449 | |
450 | |
451 #ifdef COMPILER1 | |
452 // ------------------------------------------------------------------ | |
453 // ciMethod::bci_block_start | |
454 // | |
455 // Marks all bcis where a new basic block starts | |
456 const BitMap ciMethod::bci_block_start() { | |
457 check_is_loaded(); | |
458 if (_liveness == NULL) { | |
459 // Create the liveness analyzer. | |
460 Arena* arena = CURRENT_ENV->arena(); | |
461 _liveness = new (arena) MethodLiveness(arena, this); | |
462 _liveness->compute_liveness(); | |
463 } | |
464 | |
465 return _liveness->get_bci_block_start(); | |
466 } | |
467 #endif // COMPILER1 | |
468 | |
469 | |
470 // ------------------------------------------------------------------ | |
471 // ciMethod::call_profile_at_bci | |
472 // | |
473 // Get the ciCallProfile for the invocation of this method. | |
474 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
475 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
476 ResourceMark rm; | |
477 ciCallProfile result; | |
478 if (method_data() != NULL && method_data()->is_mature()) { | |
479 ciProfileData* data = method_data()->bci_to_data(bci); | |
480 if (data != NULL && data->is_CounterData()) { | |
481 // Every profiled call site has a counter. | |
482 int count = data->as_CounterData()->count(); | |
483 | |
484 if (!data->is_ReceiverTypeData()) { | |
485 result._receiver_count[0] = 0; // that's a definite zero | |
486 } else { // ReceiverTypeData is a subclass of CounterData | |
487 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
488 // In addition, virtual call sites have receiver type information | |
489 int receivers_count_total = 0; | |
490 int morphism = 0; | |
1783 | 491 // Precompute morphism for the possible fixup |
0 | 492 for (uint i = 0; i < call->row_limit(); i++) { |
493 ciKlass* receiver = call->receiver(i); | |
494 if (receiver == NULL) continue; | |
1783 | 495 morphism++; |
496 } | |
497 int epsilon = 0; | |
498 if (TieredCompilation && ProfileInterpreter) { | |
499 // Interpreter and C1 treat final and special invokes differently. | |
500 // C1 will record a type, whereas the interpreter will just | |
501 // increment the count. Detect this case. | |
502 if (morphism == 1 && count > 0) { | |
503 epsilon = count; | |
504 count = 0; | |
505 } | |
506 } | |
507 for (uint i = 0; i < call->row_limit(); i++) { | |
508 ciKlass* receiver = call->receiver(i); | |
509 if (receiver == NULL) continue; | |
510 int rcount = call->receiver_count(i) + epsilon; | |
0 | 511 if (rcount == 0) rcount = 1; // Should be valid value |
512 receivers_count_total += rcount; | |
513 // Add the receiver to result data. | |
514 result.add_receiver(receiver, rcount); | |
515 // If we extend profiling to record methods, | |
516 // we will set result._method also. | |
517 } | |
518 // Determine call site's morphism. | |
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519 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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520 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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521 // The call site count is > 0 in the case of a polymorphic virtual call. |
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522 if (morphism > 0 && morphism == result._limit) { |
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523 // The morphism <= MorphismLimit. |
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524 if ((morphism < ciCallProfile::MorphismLimit) || |
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525 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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526 #ifdef ASSERT |
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527 if (count > 0) { |
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528 this->print_short_name(tty); |
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529 tty->print_cr(" @ bci:%d", bci); |
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530 this->print_codes(); |
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531 assert(false, "this call site should not be polymorphic"); |
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532 } |
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533 #endif |
0 | 534 result._morphism = morphism; |
535 } | |
536 } | |
537 // Make the count consistent if this is a call profile. If count is | |
538 // zero or less, presume that this is a typecheck profile and | |
539 // do nothing. Otherwise, increase count to be the sum of all | |
540 // receiver's counts. | |
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541 if (count >= 0) { |
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542 count += receivers_count_total; |
0 | 543 } |
544 } | |
545 result._count = count; | |
546 } | |
547 } | |
548 return result; | |
549 } | |
550 | |
551 // ------------------------------------------------------------------ | |
552 // Add new receiver and sort data by receiver's profile count. | |
553 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
554 // Add new receiver and sort data by receiver's counts when we have space | |
555 // for it otherwise replace the less called receiver (less called receiver | |
556 // is placed to the last array element which is not used). | |
557 // First array's element contains most called receiver. | |
558 int i = _limit; | |
559 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
560 _receiver[i] = _receiver[i-1]; | |
561 _receiver_count[i] = _receiver_count[i-1]; | |
562 } | |
563 _receiver[i] = receiver; | |
564 _receiver_count[i] = receiver_count; | |
565 if (_limit < MorphismLimit) _limit++; | |
566 } | |
567 | |
12966 | 568 |
569 void ciMethod::assert_virtual_call_type_ok(int bci) { | |
570 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || | |
571 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); | |
572 } | |
573 | |
574 void ciMethod::assert_call_type_ok(int bci) { | |
575 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || | |
576 java_code_at_bci(bci) == Bytecodes::_invokespecial || | |
577 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); | |
578 } | |
579 | |
580 /** | |
581 * Check whether profiling provides a type for the argument i to the | |
582 * call at bci bci | |
583 * | |
584 * @param bci bci of the call | |
585 * @param i argument number | |
586 * @return profiled type | |
587 * | |
588 * If the profile reports that the argument may be null, return false | |
589 * at least for now. | |
590 */ | |
591 ciKlass* ciMethod::argument_profiled_type(int bci, int i) { | |
592 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { | |
593 ciProfileData* data = method_data()->bci_to_data(bci); | |
594 if (data != NULL) { | |
595 if (data->is_VirtualCallTypeData()) { | |
596 assert_virtual_call_type_ok(bci); | |
597 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); | |
598 if (i >= call->number_of_arguments()) { | |
599 return NULL; | |
600 } | |
601 ciKlass* type = call->valid_argument_type(i); | |
602 if (type != NULL && !call->argument_maybe_null(i)) { | |
603 return type; | |
604 } | |
605 } else if (data->is_CallTypeData()) { | |
606 assert_call_type_ok(bci); | |
607 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); | |
608 if (i >= call->number_of_arguments()) { | |
609 return NULL; | |
610 } | |
611 ciKlass* type = call->valid_argument_type(i); | |
612 if (type != NULL && !call->argument_maybe_null(i)) { | |
613 return type; | |
614 } | |
615 } | |
616 } | |
617 } | |
618 return NULL; | |
619 } | |
620 | |
621 /** | |
622 * Check whether profiling provides a type for the return value from | |
623 * the call at bci bci | |
624 * | |
625 * @param bci bci of the call | |
626 * @return profiled type | |
627 * | |
628 * If the profile reports that the argument may be null, return false | |
629 * at least for now. | |
630 */ | |
631 ciKlass* ciMethod::return_profiled_type(int bci) { | |
632 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { | |
633 ciProfileData* data = method_data()->bci_to_data(bci); | |
634 if (data != NULL) { | |
635 if (data->is_VirtualCallTypeData()) { | |
636 assert_virtual_call_type_ok(bci); | |
637 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); | |
638 ciKlass* type = call->valid_return_type(); | |
639 if (type != NULL && !call->return_maybe_null()) { | |
640 return type; | |
641 } | |
642 } else if (data->is_CallTypeData()) { | |
643 assert_call_type_ok(bci); | |
644 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); | |
645 ciKlass* type = call->valid_return_type(); | |
646 if (type != NULL && !call->return_maybe_null()) { | |
647 return type; | |
648 } | |
649 } | |
650 } | |
651 } | |
652 return NULL; | |
653 } | |
654 | |
655 /** | |
656 * Check whether profiling provides a type for the parameter i | |
657 * | |
658 * @param i parameter number | |
659 * @return profiled type | |
660 * | |
661 * If the profile reports that the argument may be null, return false | |
662 * at least for now. | |
663 */ | |
664 ciKlass* ciMethod::parameter_profiled_type(int i) { | |
665 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { | |
666 ciParametersTypeData* parameters = method_data()->parameters_type_data(); | |
667 if (parameters != NULL && i < parameters->number_of_parameters()) { | |
668 ciKlass* type = parameters->valid_parameter_type(i); | |
669 if (type != NULL && !parameters->parameter_maybe_null(i)) { | |
670 return type; | |
671 } | |
672 } | |
673 } | |
674 return NULL; | |
675 } | |
676 | |
677 | |
0 | 678 // ------------------------------------------------------------------ |
679 // ciMethod::find_monomorphic_target | |
680 // | |
681 // Given a certain calling environment, find the monomorphic target | |
682 // for the call. Return NULL if the call is not monomorphic in | |
683 // its calling environment, or if there are only abstract methods. | |
684 // The returned method is never abstract. | |
685 // Note: If caller uses a non-null result, it must inform dependencies | |
686 // via assert_unique_concrete_method or assert_leaf_type. | |
687 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
688 ciInstanceKlass* callee_holder, | |
689 ciInstanceKlass* actual_recv) { | |
690 check_is_loaded(); | |
691 | |
692 if (actual_recv->is_interface()) { | |
693 // %%% We cannot trust interface types, yet. See bug 6312651. | |
694 return NULL; | |
695 } | |
696 | |
697 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
698 if (root_m == NULL) { | |
699 // Something went wrong looking up the actual receiver method. | |
700 return NULL; | |
701 } | |
702 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
703 | |
704 // Make certain quick checks even if UseCHA is false. | |
705 | |
706 // Is it private or final? | |
707 if (root_m->can_be_statically_bound()) { | |
708 return root_m; | |
709 } | |
710 | |
711 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
712 // Easy case. There is no other place to put a method, so don't bother | |
713 // to go through the VM_ENTRY_MARK and all the rest. | |
714 return root_m; | |
715 } | |
716 | |
717 // Array methods (clone, hashCode, etc.) are always statically bound. | |
718 // If we were to see an array type here, we'd return root_m. | |
719 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
720 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
721 // so there is no need to do the same job here. | |
722 | |
723 if (!UseCHA) return NULL; | |
724 | |
725 VM_ENTRY_MARK; | |
726 | |
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727 // Disable CHA for default methods for now |
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728 if (root_m->get_Method()->is_default_method()) { |
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729 return NULL; |
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730 } |
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731 |
0 | 732 methodHandle target; |
733 { | |
734 MutexLocker locker(Compile_lock); | |
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735 Klass* context = actual_recv->get_Klass(); |
0 | 736 target = Dependencies::find_unique_concrete_method(context, |
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737 root_m->get_Method()); |
0 | 738 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. |
739 } | |
740 | |
741 #ifndef PRODUCT | |
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742 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { |
0 | 743 tty->print("found a non-root unique target method"); |
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744 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); |
0 | 745 tty->print(" method = "); |
746 target->print_short_name(tty); | |
747 tty->cr(); | |
748 } | |
749 #endif //PRODUCT | |
750 | |
751 if (target() == NULL) { | |
752 return NULL; | |
753 } | |
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754 if (target() == root_m->get_Method()) { |
0 | 755 return root_m; |
756 } | |
757 if (!root_m->is_public() && | |
758 !root_m->is_protected()) { | |
759 // If we are going to reason about inheritance, it's easiest | |
760 // if the method in question is public, protected, or private. | |
761 // If the answer is not root_m, it is conservatively correct | |
762 // to return NULL, even if the CHA encountered irrelevant | |
763 // methods in other packages. | |
764 // %%% TO DO: Work out logic for package-private methods | |
765 // with the same name but different vtable indexes. | |
766 return NULL; | |
767 } | |
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768 return CURRENT_THREAD_ENV->get_method(target()); |
0 | 769 } |
770 | |
771 // ------------------------------------------------------------------ | |
772 // ciMethod::resolve_invoke | |
773 // | |
774 // Given a known receiver klass, find the target for the call. | |
775 // Return NULL if the call has no target or the target is abstract. | |
776 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
777 check_is_loaded(); | |
778 VM_ENTRY_MARK; | |
779 | |
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780 KlassHandle caller_klass (THREAD, caller->get_Klass()); |
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781 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); |
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782 KlassHandle h_resolved (THREAD, holder()->get_Klass()); |
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783 Symbol* h_name = name()->get_symbol(); |
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784 Symbol* h_signature = signature()->get_symbol(); |
0 | 785 |
786 methodHandle m; | |
787 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
788 // the vtable has not been setup, and the LinkResolver will fail. | |
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789 if (h_recv->oop_is_array() |
0 | 790 || |
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791 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { |
0 | 792 if (holder()->is_interface()) { |
793 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
794 } else { | |
795 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
796 } | |
797 } | |
798 | |
799 if (m.is_null()) { | |
800 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
801 return NULL; | |
802 } | |
803 | |
804 ciMethod* result = this; | |
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805 if (m() != get_Method()) { |
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806 result = CURRENT_THREAD_ENV->get_method(m()); |
0 | 807 } |
808 | |
809 // Don't return abstract methods because they aren't | |
810 // optimizable or interesting. | |
811 if (result->is_abstract()) { | |
812 return NULL; | |
813 } else { | |
814 return result; | |
815 } | |
816 } | |
817 | |
818 // ------------------------------------------------------------------ | |
819 // ciMethod::resolve_vtable_index | |
820 // | |
821 // Given a known receiver klass, find the vtable index for the call. | |
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822 // Return Method::invalid_vtable_index if the vtable_index is unknown. |
0 | 823 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { |
824 check_is_loaded(); | |
825 | |
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826 int vtable_index = Method::invalid_vtable_index; |
0 | 827 // Only do lookup if receiver klass has been linked. Otherwise, |
828 // the vtable has not been setup, and the LinkResolver will fail. | |
829 if (!receiver->is_interface() | |
830 && (!receiver->is_instance_klass() || | |
831 receiver->as_instance_klass()->is_linked())) { | |
832 VM_ENTRY_MARK; | |
833 | |
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834 KlassHandle caller_klass (THREAD, caller->get_Klass()); |
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835 KlassHandle h_recv (THREAD, receiver->get_Klass()); |
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836 Symbol* h_name = name()->get_symbol(); |
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837 Symbol* h_signature = signature()->get_symbol(); |
0 | 838 |
839 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
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840 if (vtable_index == Method::nonvirtual_vtable_index) { |
0 | 841 // A statically bound method. Return "no such index". |
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842 vtable_index = Method::invalid_vtable_index; |
0 | 843 } |
844 } | |
845 | |
846 return vtable_index; | |
847 } | |
848 | |
849 // ------------------------------------------------------------------ | |
850 // ciMethod::interpreter_call_site_count | |
851 int ciMethod::interpreter_call_site_count(int bci) { | |
852 if (method_data() != NULL) { | |
853 ResourceMark rm; | |
854 ciProfileData* data = method_data()->bci_to_data(bci); | |
855 if (data != NULL && data->is_CounterData()) { | |
856 return scale_count(data->as_CounterData()->count()); | |
857 } | |
858 } | |
859 return -1; // unknown | |
860 } | |
861 | |
862 // ------------------------------------------------------------------ | |
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863 // ciMethod::get_field_at_bci |
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864 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { |
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865 ciBytecodeStream iter(this); |
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866 iter.reset_to_bci(bci); |
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867 iter.next(); |
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868 return iter.get_field(will_link); |
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869 } |
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870 |
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871 // ------------------------------------------------------------------ |
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872 // ciMethod::get_method_at_bci |
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873 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { |
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874 ciBytecodeStream iter(this); |
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875 iter.reset_to_bci(bci); |
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876 iter.next(); |
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877 return iter.get_method(will_link, declared_signature); |
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878 } |
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879 |
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880 // ------------------------------------------------------------------ |
0 | 881 // Adjust a CounterData count to be commensurate with |
882 // interpreter_invocation_count. If the MDO exists for | |
883 // only 25% of the time the method exists, then the | |
884 // counts in the MDO should be scaled by 4X, so that | |
885 // they can be usefully and stably compared against the | |
886 // invocation counts in methods. | |
887 int ciMethod::scale_count(int count, float prof_factor) { | |
888 if (count > 0 && method_data() != NULL) { | |
1783 | 889 int counter_life; |
0 | 890 int method_life = interpreter_invocation_count(); |
1783 | 891 if (TieredCompilation) { |
892 // In tiered the MDO's life is measured directly, so just use the snapshotted counters | |
893 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); | |
894 } else { | |
895 int current_mileage = method_data()->current_mileage(); | |
896 int creation_mileage = method_data()->creation_mileage(); | |
897 counter_life = current_mileage - creation_mileage; | |
898 } | |
899 | |
0 | 900 // counter_life due to backedge_counter could be > method_life |
901 if (counter_life > method_life) | |
902 counter_life = method_life; | |
903 if (0 < counter_life && counter_life <= method_life) { | |
904 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
905 count = (count > 0) ? count : 1; | |
906 } | |
907 } | |
908 return count; | |
909 } | |
910 | |
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911 |
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912 // ------------------------------------------------------------------ |
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913 // ciMethod::is_special_get_caller_class_method |
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914 // |
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915 bool ciMethod::is_ignored_by_security_stack_walk() const { |
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916 check_is_loaded(); |
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917 VM_ENTRY_MARK; |
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918 return get_Method()->is_ignored_by_security_stack_walk(); |
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919 } |
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920 |
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921 |
0 | 922 // ------------------------------------------------------------------ |
710 | 923 // invokedynamic support |
1564 | 924 |
925 // ------------------------------------------------------------------ | |
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926 // ciMethod::is_method_handle_intrinsic |
710 | 927 // |
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928 // Return true if the method is an instance of the JVM-generated |
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929 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. |
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930 bool ciMethod::is_method_handle_intrinsic() const { |
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931 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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932 return (MethodHandles::is_signature_polymorphic(iid) && |
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933 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
710 | 934 } |
935 | |
1564 | 936 // ------------------------------------------------------------------ |
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937 // ciMethod::is_compiled_lambda_form |
1564 | 938 // |
939 // Return true if the method is a generated MethodHandle adapter. | |
6266
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940 // These are built by Java code. |
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941 bool ciMethod::is_compiled_lambda_form() const { |
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942 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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943 return iid == vmIntrinsics::_compiledLambdaForm; |
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944 } |
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945 |
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946 // ------------------------------------------------------------------ |
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947 // ciMethod::has_member_arg |
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948 // |
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949 // Return true if the method is a linker intrinsic like _linkToVirtual. |
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950 // These are built by the JVM. |
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951 bool ciMethod::has_member_arg() const { |
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952 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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953 return (MethodHandles::is_signature_polymorphic(iid) && |
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954 MethodHandles::has_member_arg(iid)); |
710 | 955 } |
956 | |
957 // ------------------------------------------------------------------ | |
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958 // ciMethod::ensure_method_data |
0 | 959 // |
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960 // Generate new MethodData* objects at compile time. |
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961 // Return true if allocation was successful or no MDO is required. |
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962 bool ciMethod::ensure_method_data(methodHandle h_m) { |
0 | 963 EXCEPTION_CONTEXT; |
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964 if (is_native() || is_abstract() || h_m()->is_accessor()) { |
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965 return true; |
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966 } |
0 | 967 if (h_m()->method_data() == NULL) { |
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968 Method::build_interpreter_method_data(h_m, THREAD); |
0 | 969 if (HAS_PENDING_EXCEPTION) { |
970 CLEAR_PENDING_EXCEPTION; | |
971 } | |
972 } | |
973 if (h_m()->method_data() != NULL) { | |
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974 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); |
0 | 975 _method_data->load_data(); |
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976 return true; |
0 | 977 } else { |
978 _method_data = CURRENT_ENV->get_empty_methodData(); | |
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979 return false; |
0 | 980 } |
981 } | |
982 | |
983 // public, retroactive version | |
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984 bool ciMethod::ensure_method_data() { |
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985 bool result = true; |
0 | 986 if (_method_data == NULL || _method_data->is_empty()) { |
987 GUARDED_VM_ENTRY({ | |
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988 result = ensure_method_data(get_Method()); |
0 | 989 }); |
990 } | |
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991 return result; |
0 | 992 } |
993 | |
994 | |
995 // ------------------------------------------------------------------ | |
996 // ciMethod::method_data | |
997 // | |
998 ciMethodData* ciMethod::method_data() { | |
999 if (_method_data != NULL) { | |
1000 return _method_data; | |
1001 } | |
1002 VM_ENTRY_MARK; | |
1003 ciEnv* env = CURRENT_ENV; | |
1004 Thread* my_thread = JavaThread::current(); | |
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1005 methodHandle h_m(my_thread, get_Method()); |
0 | 1006 |
1007 if (h_m()->method_data() != NULL) { | |
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1008 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); |
0 | 1009 _method_data->load_data(); |
1010 } else { | |
1011 _method_data = CURRENT_ENV->get_empty_methodData(); | |
1012 } | |
1013 return _method_data; | |
1014 | |
1015 } | |
1016 | |
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1017 // ------------------------------------------------------------------ |
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1018 // ciMethod::method_data_or_null |
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1019 // Returns a pointer to ciMethodData if MDO exists on the VM side, |
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1020 // NULL otherwise. |
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1021 ciMethodData* ciMethod::method_data_or_null() { |
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1022 ciMethodData *md = method_data(); |
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1023 if (md->is_empty()) { |
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1024 return NULL; |
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1025 } |
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1026 return md; |
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1027 } |
0 | 1028 |
1029 // ------------------------------------------------------------------ | |
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1030 // ciMethod::ensure_method_counters |
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1031 // |
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1032 MethodCounters* ciMethod::ensure_method_counters() { |
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1033 check_is_loaded(); |
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1034 VM_ENTRY_MARK; |
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1035 methodHandle mh(THREAD, get_Method()); |
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1036 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); |
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1037 return method_counters; |
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1038 } |
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1039 |
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1040 // ------------------------------------------------------------------ |
0 | 1041 // ciMethod::should_exclude |
1042 // | |
1043 // Should this method be excluded from compilation? | |
1044 bool ciMethod::should_exclude() { | |
1045 check_is_loaded(); | |
1046 VM_ENTRY_MARK; | |
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1047 methodHandle mh(THREAD, get_Method()); |
0 | 1048 bool ignore; |
1049 return CompilerOracle::should_exclude(mh, ignore); | |
1050 } | |
1051 | |
1052 // ------------------------------------------------------------------ | |
1053 // ciMethod::should_inline | |
1054 // | |
1055 // Should this method be inlined during compilation? | |
1056 bool ciMethod::should_inline() { | |
1057 check_is_loaded(); | |
1058 VM_ENTRY_MARK; | |
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1059 methodHandle mh(THREAD, get_Method()); |
0 | 1060 return CompilerOracle::should_inline(mh); |
1061 } | |
1062 | |
1063 // ------------------------------------------------------------------ | |
1064 // ciMethod::should_not_inline | |
1065 // | |
1066 // Should this method be disallowed from inlining during compilation? | |
1067 bool ciMethod::should_not_inline() { | |
1068 check_is_loaded(); | |
1069 VM_ENTRY_MARK; | |
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1070 methodHandle mh(THREAD, get_Method()); |
0 | 1071 return CompilerOracle::should_not_inline(mh); |
1072 } | |
1073 | |
1074 // ------------------------------------------------------------------ | |
1075 // ciMethod::should_print_assembly | |
1076 // | |
1077 // Should the compiler print the generated code for this method? | |
1078 bool ciMethod::should_print_assembly() { | |
1079 check_is_loaded(); | |
1080 VM_ENTRY_MARK; | |
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1081 methodHandle mh(THREAD, get_Method()); |
0 | 1082 return CompilerOracle::should_print(mh); |
1083 } | |
1084 | |
1085 // ------------------------------------------------------------------ | |
1086 // ciMethod::break_at_execute | |
1087 // | |
1088 // Should the compiler insert a breakpoint into the generated code | |
1089 // method? | |
1090 bool ciMethod::break_at_execute() { | |
1091 check_is_loaded(); | |
1092 VM_ENTRY_MARK; | |
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1093 methodHandle mh(THREAD, get_Method()); |
0 | 1094 return CompilerOracle::should_break_at(mh); |
1095 } | |
1096 | |
1097 // ------------------------------------------------------------------ | |
1098 // ciMethod::has_option | |
1099 // | |
1100 bool ciMethod::has_option(const char* option) { | |
1101 check_is_loaded(); | |
1102 VM_ENTRY_MARK; | |
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1103 methodHandle mh(THREAD, get_Method()); |
0 | 1104 return CompilerOracle::has_option_string(mh, option); |
1105 } | |
1106 | |
1107 // ------------------------------------------------------------------ | |
1108 // ciMethod::can_be_compiled | |
1109 // | |
1110 // Have previous compilations of this method succeeded? | |
1111 bool ciMethod::can_be_compiled() { | |
1112 check_is_loaded(); | |
1783 | 1113 ciEnv* env = CURRENT_ENV; |
1114 if (is_c1_compile(env->comp_level())) { | |
1115 return _is_c1_compilable; | |
1116 } | |
1117 return _is_c2_compilable; | |
0 | 1118 } |
1119 | |
1120 // ------------------------------------------------------------------ | |
1121 // ciMethod::set_not_compilable | |
1122 // | |
1123 // Tell the VM that this method cannot be compiled at all. | |
7998 | 1124 void ciMethod::set_not_compilable(const char* reason) { |
0 | 1125 check_is_loaded(); |
1126 VM_ENTRY_MARK; | |
1783 | 1127 ciEnv* env = CURRENT_ENV; |
1128 if (is_c1_compile(env->comp_level())) { | |
1129 _is_c1_compilable = false; | |
1130 } else { | |
1131 _is_c2_compilable = false; | |
1132 } | |
7998 | 1133 get_Method()->set_not_compilable(env->comp_level(), true, reason); |
0 | 1134 } |
1135 | |
1136 // ------------------------------------------------------------------ | |
1137 // ciMethod::can_be_osr_compiled | |
1138 // | |
1139 // Have previous compilations of this method succeeded? | |
1140 // | |
1141 // Implementation note: the VM does not currently keep track | |
1142 // of failed OSR compilations per bci. The entry_bci parameter | |
1143 // is currently unused. | |
1144 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
1145 check_is_loaded(); | |
1146 VM_ENTRY_MARK; | |
1783 | 1147 ciEnv* env = CURRENT_ENV; |
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1148 return !get_Method()->is_not_osr_compilable(env->comp_level()); |
0 | 1149 } |
1150 | |
1151 // ------------------------------------------------------------------ | |
1152 // ciMethod::has_compiled_code | |
1153 bool ciMethod::has_compiled_code() { | |
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1154 return instructions_size() > 0; |
0 | 1155 } |
1156 | |
1783 | 1157 int ciMethod::comp_level() { |
1158 check_is_loaded(); | |
1159 VM_ENTRY_MARK; | |
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1160 nmethod* nm = get_Method()->code(); |
1783 | 1161 if (nm != NULL) return nm->comp_level(); |
1162 return 0; | |
1163 } | |
1164 | |
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1165 int ciMethod::highest_osr_comp_level() { |
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1166 check_is_loaded(); |
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1167 VM_ENTRY_MARK; |
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1168 return get_Method()->highest_osr_comp_level(); |
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1169 } |
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1170 |
0 | 1171 // ------------------------------------------------------------------ |
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1172 // ciMethod::code_size_for_inlining |
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1173 // |
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1174 // Code size for inlining decisions. This method returns a code |
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1175 // size of 1 for methods which has the ForceInline annotation. |
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1176 int ciMethod::code_size_for_inlining() { |
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1177 check_is_loaded(); |
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1178 if (get_Method()->force_inline()) { |
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1179 return 1; |
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1180 } |
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1181 return code_size(); |
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1182 } |
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1183 |
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1184 // ------------------------------------------------------------------ |
0 | 1185 // ciMethod::instructions_size |
1748 | 1186 // |
1187 // This is a rough metric for "fat" methods, compared before inlining | |
1188 // with InlineSmallCode. The CodeBlob::code_size accessor includes | |
1189 // junk like exception handler, stubs, and constant table, which are | |
1190 // not highly relevant to an inlined method. So we use the more | |
1191 // specific accessor nmethod::insts_size. | |
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1192 int ciMethod::instructions_size() { |
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1193 if (_instructions_size == -1) { |
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1194 GUARDED_VM_ENTRY( |
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1195 nmethod* code = get_Method()->code(); |
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1196 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { |
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1197 _instructions_size = code->insts_end() - code->verified_entry_point(); |
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1198 } else { |
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1199 _instructions_size = 0; |
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1200 } |
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1201 ); |
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1202 } |
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1203 return _instructions_size; |
0 | 1204 } |
1205 | |
1206 // ------------------------------------------------------------------ | |
1207 // ciMethod::log_nmethod_identity | |
1208 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
1209 GUARDED_VM_ENTRY( | |
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1210 nmethod* code = get_Method()->code(); |
0 | 1211 if (code != NULL) { |
1212 code->log_identity(log); | |
1213 } | |
1214 ) | |
1215 } | |
1216 | |
1217 // ------------------------------------------------------------------ | |
1218 // ciMethod::is_not_reached | |
1219 bool ciMethod::is_not_reached(int bci) { | |
1220 check_is_loaded(); | |
1221 VM_ENTRY_MARK; | |
1222 return Interpreter::is_not_reached( | |
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1223 methodHandle(THREAD, get_Method()), bci); |
0 | 1224 } |
1225 | |
1226 // ------------------------------------------------------------------ | |
1227 // ciMethod::was_never_executed | |
1228 bool ciMethod::was_executed_more_than(int times) { | |
1229 VM_ENTRY_MARK; | |
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1230 return get_Method()->was_executed_more_than(times); |
0 | 1231 } |
1232 | |
1233 // ------------------------------------------------------------------ | |
1234 // ciMethod::has_unloaded_classes_in_signature | |
1235 bool ciMethod::has_unloaded_classes_in_signature() { | |
1236 VM_ENTRY_MARK; | |
1237 { | |
1238 EXCEPTION_MARK; | |
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1239 methodHandle m(THREAD, get_Method()); |
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1240 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); |
0 | 1241 if( HAS_PENDING_EXCEPTION ) { |
1242 CLEAR_PENDING_EXCEPTION; | |
1243 return true; // Declare that we may have unloaded classes | |
1244 } | |
1245 return has_unloaded; | |
1246 } | |
1247 } | |
1248 | |
1249 // ------------------------------------------------------------------ | |
1250 // ciMethod::is_klass_loaded | |
1251 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
1252 VM_ENTRY_MARK; | |
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1253 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); |
0 | 1254 } |
1255 | |
1256 // ------------------------------------------------------------------ | |
1257 // ciMethod::check_call | |
1258 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
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1259 // This method is used only in C2 from InlineTree::ok_to_inline, |
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1260 // and is only used under -Xcomp or -XX:CompileTheWorld. |
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1261 // It appears to fail when applied to an invokeinterface call site. |
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1262 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. |
0 | 1263 VM_ENTRY_MARK; |
1264 { | |
1265 EXCEPTION_MARK; | |
1266 HandleMark hm(THREAD); | |
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1267 constantPoolHandle pool (THREAD, get_Method()->constants()); |
0 | 1268 methodHandle spec_method; |
1269 KlassHandle spec_klass; | |
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1270 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); |
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1271 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); |
0 | 1272 if (HAS_PENDING_EXCEPTION) { |
1273 CLEAR_PENDING_EXCEPTION; | |
1274 return false; | |
1275 } else { | |
1276 return (spec_method->is_static() == is_static); | |
1277 } | |
1278 } | |
1279 return false; | |
1280 } | |
1281 | |
1282 // ------------------------------------------------------------------ | |
1283 // ciMethod::print_codes | |
1284 // | |
1285 // Print the bytecodes for this method. | |
1286 void ciMethod::print_codes_on(outputStream* st) { | |
1287 check_is_loaded(); | |
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1288 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) |
0 | 1289 } |
1290 | |
1291 | |
1292 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
1293 check_is_loaded(); \ | |
1294 VM_ENTRY_MARK; \ | |
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1295 return get_Method()->flag_accessor(); \ |
0 | 1296 } |
1297 | |
1298 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
1299 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
1300 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
1301 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
1302 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
1303 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
1304 | |
10278 | 1305 bool ciMethod::is_boxing_method() const { |
1306 if (holder()->is_box_klass()) { | |
1307 switch (intrinsic_id()) { | |
1308 case vmIntrinsics::_Boolean_valueOf: | |
1309 case vmIntrinsics::_Byte_valueOf: | |
1310 case vmIntrinsics::_Character_valueOf: | |
1311 case vmIntrinsics::_Short_valueOf: | |
1312 case vmIntrinsics::_Integer_valueOf: | |
1313 case vmIntrinsics::_Long_valueOf: | |
1314 case vmIntrinsics::_Float_valueOf: | |
1315 case vmIntrinsics::_Double_valueOf: | |
1316 return true; | |
1317 default: | |
1318 return false; | |
1319 } | |
1320 } | |
1321 return false; | |
1322 } | |
1323 | |
1324 bool ciMethod::is_unboxing_method() const { | |
1325 if (holder()->is_box_klass()) { | |
1326 switch (intrinsic_id()) { | |
1327 case vmIntrinsics::_booleanValue: | |
1328 case vmIntrinsics::_byteValue: | |
1329 case vmIntrinsics::_charValue: | |
1330 case vmIntrinsics::_shortValue: | |
1331 case vmIntrinsics::_intValue: | |
1332 case vmIntrinsics::_longValue: | |
1333 case vmIntrinsics::_floatValue: | |
1334 case vmIntrinsics::_doubleValue: | |
1335 return true; | |
1336 default: | |
1337 return false; | |
1338 } | |
1339 } | |
1340 return false; | |
1341 } | |
1342 | |
0 | 1343 BCEscapeAnalyzer *ciMethod::get_bcea() { |
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1344 #ifdef COMPILER2 |
0 | 1345 if (_bcea == NULL) { |
1346 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
1347 } | |
1348 return _bcea; | |
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1349 #else // COMPILER2 |
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1350 ShouldNotReachHere(); |
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1351 return NULL; |
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1352 #endif // COMPILER2 |
0 | 1353 } |
1354 | |
1355 ciMethodBlocks *ciMethod::get_method_blocks() { | |
1356 Arena *arena = CURRENT_ENV->arena(); | |
1357 if (_method_blocks == NULL) { | |
1358 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
1359 } | |
1360 return _method_blocks; | |
1361 } | |
1362 | |
1363 #undef FETCH_FLAG_FROM_VM | |
1364 | |
14232 | 1365 void ciMethod::dump_name_as_ascii(outputStream* st) { |
1366 Method* method = get_Method(); | |
1367 st->print("%s %s %s", | |
1368 method->klass_name()->as_quoted_ascii(), | |
1369 method->name()->as_quoted_ascii(), | |
1370 method->signature()->as_quoted_ascii()); | |
1371 } | |
1372 | |
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1373 void ciMethod::dump_replay_data(outputStream* st) { |
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1374 ResourceMark rm; |
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1375 Method* method = get_Method(); |
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1376 MethodCounters* mcs = method->method_counters(); |
14232 | 1377 st->print("ciMethod "); |
1378 dump_name_as_ascii(st); | |
1379 st->print_cr(" %d %d %d %d %d", | |
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1380 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), |
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1381 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), |
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1382 interpreter_invocation_count(), |
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1383 interpreter_throwout_count(), |
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1384 _instructions_size); |
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1385 } |
0 | 1386 |
1387 // ------------------------------------------------------------------ | |
1388 // ciMethod::print_codes | |
1389 // | |
1390 // Print a range of the bytecodes for this method. | |
1391 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1392 check_is_loaded(); | |
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1393 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) |
0 | 1394 } |
1395 | |
1396 // ------------------------------------------------------------------ | |
1397 // ciMethod::print_name | |
1398 // | |
1399 // Print the name of this method, including signature and some flags. | |
1400 void ciMethod::print_name(outputStream* st) { | |
1401 check_is_loaded(); | |
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1402 GUARDED_VM_ENTRY(get_Method()->print_name(st);) |
0 | 1403 } |
1404 | |
1405 // ------------------------------------------------------------------ | |
1406 // ciMethod::print_short_name | |
1407 // | |
1408 // Print the name of this method, without signature. | |
1409 void ciMethod::print_short_name(outputStream* st) { | |
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1410 if (is_loaded()) { |
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1411 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); |
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1412 } else { |
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1413 // Fall back if method is not loaded. |
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1414 holder()->print_name_on(st); |
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1415 st->print("::"); |
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1416 name()->print_symbol_on(st); |
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1417 if (WizardMode) |
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1418 signature()->as_symbol()->print_symbol_on(st); |
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1419 } |
0 | 1420 } |
1421 | |
1422 // ------------------------------------------------------------------ | |
1423 // ciMethod::print_impl | |
1424 // | |
1425 // Implementation of the print method. | |
1426 void ciMethod::print_impl(outputStream* st) { | |
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1427 ciMetadata::print_impl(st); |
0 | 1428 st->print(" name="); |
1429 name()->print_symbol_on(st); | |
1430 st->print(" holder="); | |
1431 holder()->print_name_on(st); | |
1432 st->print(" signature="); | |
1433 signature()->as_symbol()->print_symbol_on(st); | |
1434 if (is_loaded()) { | |
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1435 st->print(" loaded=true"); |
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1436 st->print(" arg_size=%d", arg_size()); |
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1437 st->print(" flags="); |
0 | 1438 flags().print_member_flags(st); |
1439 } else { | |
1440 st->print(" loaded=false"); | |
1441 } | |
1442 } |