Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.cpp @ 18186:ef357effbda7
Backout of changeset 9a804ec7f707 (converted Constant and Value to be interfaces).
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Thu, 30 Oct 2014 11:18:48 +0100 |
parents | 52b4284cb496 |
children | 7848fc12602b |
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(); |
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83 _size_of_parameters = h_m()->size_of_parameters(); |
0 | 84 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); |
85 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); | |
1783 | 86 _is_c1_compilable = !h_m()->is_not_c1_compilable(); |
87 _is_c2_compilable = !h_m()->is_not_c2_compilable(); | |
0 | 88 // Lazy fields, filled in on demand. Require allocation. |
89 _code = NULL; | |
90 _exception_handlers = NULL; | |
91 _liveness = NULL; | |
92 _method_blocks = NULL; | |
1692 | 93 #if defined(COMPILER2) || defined(SHARK) |
0 | 94 _flow = NULL; |
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95 _bcea = NULL; |
1692 | 96 #endif // COMPILER2 || SHARK |
0 | 97 |
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98 ciEnv *env = CURRENT_ENV; |
1783 | 99 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { |
0 | 100 // 6328518 check hotswap conditions under the right lock. |
101 MutexLocker locker(Compile_lock); | |
102 if (Dependencies::check_evol_method(h_m()) != NULL) { | |
1783 | 103 _is_c1_compilable = false; |
104 _is_c2_compilable = false; | |
0 | 105 } |
106 } else { | |
107 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
108 } | |
109 | |
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110 if (h_m()->method_holder()->is_linked()) { |
0 | 111 _can_be_statically_bound = h_m()->can_be_statically_bound(); |
112 } else { | |
113 // Have to use a conservative value in this case. | |
114 _can_be_statically_bound = false; | |
115 } | |
116 | |
117 // Adjust the definition of this condition to be more useful: | |
118 // %%% take these conditions into account in vtable generation | |
119 if (!_can_be_statically_bound && h_m()->is_private()) | |
120 _can_be_statically_bound = true; | |
121 if (_can_be_statically_bound && h_m()->is_abstract()) | |
122 _can_be_statically_bound = false; | |
123 | |
124 // generating _signature may allow GC and therefore move m. | |
125 // These fields are always filled in. | |
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126 _name = env->get_symbol(h_m()->name()); |
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127 _holder = env->get_instance_klass(h_m()->method_holder()); |
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128 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); |
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129 constantPoolHandle cpool = h_m()->constants(); |
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130 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); |
0 | 131 _method_data = NULL; |
132 // Take a snapshot of these values, so they will be commensurate with the MDO. | |
1783 | 133 if (ProfileInterpreter || TieredCompilation) { |
0 | 134 int invcnt = h_m()->interpreter_invocation_count(); |
135 // if the value overflowed report it as max int | |
136 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; | |
137 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); | |
138 } else { | |
139 _interpreter_invocation_count = 0; | |
140 _interpreter_throwout_count = 0; | |
141 } | |
142 if (_interpreter_invocation_count == 0) | |
143 _interpreter_invocation_count = 1; | |
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144 _instructions_size = -1; |
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145 #ifdef ASSERT |
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146 if (ReplayCompiles) { |
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147 ciReplay::initialize(this); |
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148 } |
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149 #endif |
0 | 150 } |
151 | |
152 | |
153 // ------------------------------------------------------------------ | |
154 // ciMethod::ciMethod | |
155 // | |
156 // Unloaded method. | |
157 ciMethod::ciMethod(ciInstanceKlass* holder, | |
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158 ciSymbol* name, |
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159 ciSymbol* signature, |
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160 ciInstanceKlass* accessor) : |
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161 ciMetadata((Metadata*)NULL), |
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162 _name( name), |
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163 _holder( holder), |
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164 _intrinsic_id( vmIntrinsics::_none), |
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165 _liveness( NULL), |
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166 _can_be_statically_bound(false), |
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167 _method_blocks( NULL), |
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168 _method_data( NULL) |
1692 | 169 #if defined(COMPILER2) || defined(SHARK) |
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170 , |
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171 _flow( NULL), |
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172 _bcea( NULL), |
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173 _instructions_size(-1) |
1692 | 174 #endif // COMPILER2 || SHARK |
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175 { |
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176 // Usually holder and accessor are the same type but in some cases |
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177 // the holder has the wrong class loader (e.g. invokedynamic call |
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178 // sites) so we pass the accessor. |
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179 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); |
0 | 180 } |
181 | |
182 | |
183 // ------------------------------------------------------------------ | |
184 // ciMethod::load_code | |
185 // | |
186 // Load the bytecodes and exception handler table for this method. | |
187 void ciMethod::load_code() { | |
188 VM_ENTRY_MARK; | |
189 assert(is_loaded(), "only loaded methods have code"); | |
190 | |
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191 Method* me = get_Method(); |
0 | 192 Arena* arena = CURRENT_THREAD_ENV->arena(); |
193 | |
194 // Load the bytecodes. | |
195 _code = (address)arena->Amalloc(code_size()); | |
196 memcpy(_code, me->code_base(), code_size()); | |
197 | |
198 // Revert any breakpoint bytecodes in ci's copy | |
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199 if (me->number_of_breakpoints() > 0) { |
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200 BreakpointInfo* bp = me->method_holder()->breakpoints(); |
0 | 201 for (; bp != NULL; bp = bp->next()) { |
202 if (bp->match(me)) { | |
203 code_at_put(bp->bci(), bp->orig_bytecode()); | |
204 } | |
205 } | |
206 } | |
207 | |
208 // And load the exception table. | |
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209 ExceptionTable exc_table(me); |
0 | 210 |
211 // Allocate one extra spot in our list of exceptions. This | |
212 // last entry will be used to represent the possibility that | |
213 // an exception escapes the method. See ciExceptionHandlerStream | |
214 // for details. | |
215 _exception_handlers = | |
216 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) | |
217 * (_handler_count + 1)); | |
218 if (_handler_count > 0) { | |
219 for (int i=0; i<_handler_count; i++) { | |
220 _exception_handlers[i] = new (arena) ciExceptionHandler( | |
221 holder(), | |
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222 /* start */ exc_table.start_pc(i), |
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223 /* limit */ exc_table.end_pc(i), |
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224 /* goto pc */ exc_table.handler_pc(i), |
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225 /* cp index */ exc_table.catch_type_index(i)); |
0 | 226 } |
227 } | |
228 | |
229 // Put an entry at the end of our list to represent the possibility | |
230 // of exceptional exit. | |
231 _exception_handlers[_handler_count] = | |
232 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); | |
233 | |
234 if (CIPrintMethodCodes) { | |
235 print_codes(); | |
236 } | |
237 } | |
238 | |
239 | |
240 // ------------------------------------------------------------------ | |
241 // ciMethod::has_linenumber_table | |
242 // | |
243 // length unknown until decompression | |
244 bool ciMethod::has_linenumber_table() const { | |
245 check_is_loaded(); | |
246 VM_ENTRY_MARK; | |
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247 return get_Method()->has_linenumber_table(); |
0 | 248 } |
249 | |
250 | |
251 // ------------------------------------------------------------------ | |
252 // ciMethod::compressed_linenumber_table | |
253 u_char* ciMethod::compressed_linenumber_table() const { | |
254 check_is_loaded(); | |
255 VM_ENTRY_MARK; | |
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256 return get_Method()->compressed_linenumber_table(); |
0 | 257 } |
258 | |
259 | |
260 // ------------------------------------------------------------------ | |
261 // ciMethod::line_number_from_bci | |
262 int ciMethod::line_number_from_bci(int bci) const { | |
263 check_is_loaded(); | |
264 VM_ENTRY_MARK; | |
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265 return get_Method()->line_number_from_bci(bci); |
0 | 266 } |
267 | |
268 | |
269 // ------------------------------------------------------------------ | |
270 // ciMethod::vtable_index | |
271 // | |
272 // Get the position of this method's entry in the vtable, if any. | |
273 int ciMethod::vtable_index() { | |
274 check_is_loaded(); | |
275 assert(holder()->is_linked(), "must be linked"); | |
276 VM_ENTRY_MARK; | |
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277 return get_Method()->vtable_index(); |
0 | 278 } |
279 | |
280 | |
1692 | 281 #ifdef SHARK |
282 // ------------------------------------------------------------------ | |
283 // ciMethod::itable_index | |
284 // | |
285 // Get the position of this method's entry in the itable, if any. | |
286 int ciMethod::itable_index() { | |
287 check_is_loaded(); | |
288 assert(holder()->is_linked(), "must be linked"); | |
289 VM_ENTRY_MARK; | |
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290 Method* m = get_Method(); |
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291 if (!m->has_itable_index()) |
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292 return Method::nonvirtual_vtable_index; |
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293 return m->itable_index(); |
1692 | 294 } |
295 #endif // SHARK | |
296 | |
297 | |
0 | 298 // ------------------------------------------------------------------ |
299 // ciMethod::native_entry | |
300 // | |
301 // Get the address of this method's native code, if any. | |
302 address ciMethod::native_entry() { | |
303 check_is_loaded(); | |
304 assert(flags().is_native(), "must be native method"); | |
305 VM_ENTRY_MARK; | |
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306 Method* method = get_Method(); |
0 | 307 address entry = method->native_function(); |
308 assert(entry != NULL, "must be valid entry point"); | |
309 return entry; | |
310 } | |
311 | |
312 | |
313 // ------------------------------------------------------------------ | |
314 // ciMethod::interpreter_entry | |
315 // | |
316 // Get the entry point for running this method in the interpreter. | |
317 address ciMethod::interpreter_entry() { | |
318 check_is_loaded(); | |
319 VM_ENTRY_MARK; | |
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320 methodHandle mh(THREAD, get_Method()); |
0 | 321 return Interpreter::entry_for_method(mh); |
322 } | |
323 | |
324 | |
325 // ------------------------------------------------------------------ | |
326 // ciMethod::uses_balanced_monitors | |
327 // | |
328 // Does this method use monitors in a strict stack-disciplined manner? | |
329 bool ciMethod::has_balanced_monitors() { | |
330 check_is_loaded(); | |
331 if (_balanced_monitors) return true; | |
332 | |
333 // Analyze the method to see if monitors are used properly. | |
334 VM_ENTRY_MARK; | |
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335 methodHandle method(THREAD, get_Method()); |
0 | 336 assert(method->has_monitor_bytecodes(), "should have checked this"); |
337 | |
338 // Check to see if a previous compilation computed the | |
339 // monitor-matching analysis. | |
340 if (method->guaranteed_monitor_matching()) { | |
341 _balanced_monitors = true; | |
342 return true; | |
343 } | |
344 | |
345 { | |
346 EXCEPTION_MARK; | |
347 ResourceMark rm(THREAD); | |
348 GeneratePairingInfo gpi(method); | |
349 gpi.compute_map(CATCH); | |
350 if (!gpi.monitor_safe()) { | |
351 return false; | |
352 } | |
353 method->set_guaranteed_monitor_matching(); | |
354 _balanced_monitors = true; | |
355 } | |
356 return true; | |
357 } | |
358 | |
359 | |
360 // ------------------------------------------------------------------ | |
361 // ciMethod::get_flow_analysis | |
362 ciTypeFlow* ciMethod::get_flow_analysis() { | |
1692 | 363 #if defined(COMPILER2) || defined(SHARK) |
0 | 364 if (_flow == NULL) { |
365 ciEnv* env = CURRENT_ENV; | |
366 _flow = new (env->arena()) ciTypeFlow(env, this); | |
367 _flow->do_flow(); | |
368 } | |
369 return _flow; | |
1692 | 370 #else // COMPILER2 || SHARK |
0 | 371 ShouldNotReachHere(); |
372 return NULL; | |
1692 | 373 #endif // COMPILER2 || SHARK |
0 | 374 } |
375 | |
376 | |
377 // ------------------------------------------------------------------ | |
378 // ciMethod::get_osr_flow_analysis | |
379 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
1692 | 380 #if defined(COMPILER2) || defined(SHARK) |
0 | 381 // OSR entry points are always place after a call bytecode of some sort |
382 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
383 ciEnv* env = CURRENT_ENV; | |
384 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
385 flow->do_flow(); | |
386 return flow; | |
1692 | 387 #else // COMPILER2 || SHARK |
0 | 388 ShouldNotReachHere(); |
389 return NULL; | |
1692 | 390 #endif // COMPILER2 || SHARK |
0 | 391 } |
392 | |
393 // ------------------------------------------------------------------ | |
991 | 394 // ciMethod::raw_liveness_at_bci |
0 | 395 // |
396 // Which local variables are live at a specific bci? | |
991 | 397 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
0 | 398 check_is_loaded(); |
399 if (_liveness == NULL) { | |
400 // Create the liveness analyzer. | |
401 Arena* arena = CURRENT_ENV->arena(); | |
402 _liveness = new (arena) MethodLiveness(arena, this); | |
403 _liveness->compute_liveness(); | |
404 } | |
991 | 405 return _liveness->get_liveness_at(bci); |
406 } | |
407 | |
408 // ------------------------------------------------------------------ | |
409 // ciMethod::liveness_at_bci | |
410 // | |
411 // Which local variables are live at a specific bci? When debugging | |
412 // will return true for all locals in some cases to improve debug | |
413 // information. | |
414 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
415 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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416 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { |
0 | 417 // Keep all locals live for the user's edification and amusement. |
418 result.at_put_range(0, result.size(), true); | |
419 } | |
420 return result; | |
421 } | |
422 | |
423 // ciMethod::live_local_oops_at_bci | |
424 // | |
425 // find all the live oops in the locals array for a particular bci | |
426 // Compute what the interpreter believes by using the interpreter | |
427 // oopmap generator. This is used as a double check during osr to | |
428 // guard against conservative result from MethodLiveness making us | |
429 // think a dead oop is live. MethodLiveness is conservative in the | |
430 // sense that it may consider locals to be live which cannot be live, | |
431 // like in the case where a local could contain an oop or a primitive | |
432 // along different paths. In that case the local must be dead when | |
433 // those paths merge. Since the interpreter's viewpoint is used when | |
434 // gc'ing an interpreter frame we need to use its viewpoint during | |
435 // OSR when loading the locals. | |
436 | |
437 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
438 VM_ENTRY_MARK; | |
439 InterpreterOopMap mask; | |
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440 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); |
0 | 441 int mask_size = max_locals(); |
442 BitMap result(mask_size); | |
443 result.clear(); | |
444 int i; | |
445 for (i = 0; i < mask_size ; i++ ) { | |
446 if (mask.is_oop(i)) result.set_bit(i); | |
447 } | |
448 return result; | |
449 } | |
450 | |
451 | |
452 #ifdef COMPILER1 | |
453 // ------------------------------------------------------------------ | |
454 // ciMethod::bci_block_start | |
455 // | |
456 // Marks all bcis where a new basic block starts | |
457 const BitMap ciMethod::bci_block_start() { | |
458 check_is_loaded(); | |
459 if (_liveness == NULL) { | |
460 // Create the liveness analyzer. | |
461 Arena* arena = CURRENT_ENV->arena(); | |
462 _liveness = new (arena) MethodLiveness(arena, this); | |
463 _liveness->compute_liveness(); | |
464 } | |
465 | |
466 return _liveness->get_bci_block_start(); | |
467 } | |
468 #endif // COMPILER1 | |
469 | |
470 | |
471 // ------------------------------------------------------------------ | |
472 // ciMethod::call_profile_at_bci | |
473 // | |
474 // Get the ciCallProfile for the invocation of this method. | |
475 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
476 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
477 ResourceMark rm; | |
478 ciCallProfile result; | |
479 if (method_data() != NULL && method_data()->is_mature()) { | |
480 ciProfileData* data = method_data()->bci_to_data(bci); | |
481 if (data != NULL && data->is_CounterData()) { | |
482 // Every profiled call site has a counter. | |
483 int count = data->as_CounterData()->count(); | |
484 | |
485 if (!data->is_ReceiverTypeData()) { | |
486 result._receiver_count[0] = 0; // that's a definite zero | |
487 } else { // ReceiverTypeData is a subclass of CounterData | |
488 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
489 // In addition, virtual call sites have receiver type information | |
490 int receivers_count_total = 0; | |
491 int morphism = 0; | |
1783 | 492 // Precompute morphism for the possible fixup |
0 | 493 for (uint i = 0; i < call->row_limit(); i++) { |
494 ciKlass* receiver = call->receiver(i); | |
495 if (receiver == NULL) continue; | |
1783 | 496 morphism++; |
497 } | |
498 int epsilon = 0; | |
499 if (TieredCompilation && ProfileInterpreter) { | |
500 // Interpreter and C1 treat final and special invokes differently. | |
501 // C1 will record a type, whereas the interpreter will just | |
502 // increment the count. Detect this case. | |
503 if (morphism == 1 && count > 0) { | |
504 epsilon = count; | |
505 count = 0; | |
506 } | |
507 } | |
508 for (uint i = 0; i < call->row_limit(); i++) { | |
509 ciKlass* receiver = call->receiver(i); | |
510 if (receiver == NULL) continue; | |
511 int rcount = call->receiver_count(i) + epsilon; | |
0 | 512 if (rcount == 0) rcount = 1; // Should be valid value |
513 receivers_count_total += rcount; | |
514 // Add the receiver to result data. | |
515 result.add_receiver(receiver, rcount); | |
516 // If we extend profiling to record methods, | |
517 // we will set result._method also. | |
518 } | |
519 // Determine call site's morphism. | |
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520 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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521 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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522 // The call site count is > 0 in the case of a polymorphic virtual call. |
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523 if (morphism > 0 && morphism == result._limit) { |
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524 // The morphism <= MorphismLimit. |
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525 if ((morphism < ciCallProfile::MorphismLimit) || |
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526 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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527 #ifdef ASSERT |
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528 if (count > 0) { |
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529 this->print_short_name(tty); |
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530 tty->print_cr(" @ bci:%d", bci); |
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531 this->print_codes(); |
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532 assert(false, "this call site should not be polymorphic"); |
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533 } |
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534 #endif |
0 | 535 result._morphism = morphism; |
536 } | |
537 } | |
538 // Make the count consistent if this is a call profile. If count is | |
539 // zero or less, presume that this is a typecheck profile and | |
540 // do nothing. Otherwise, increase count to be the sum of all | |
541 // receiver's counts. | |
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542 if (count >= 0) { |
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543 count += receivers_count_total; |
0 | 544 } |
545 } | |
546 result._count = count; | |
547 } | |
548 } | |
549 return result; | |
550 } | |
551 | |
552 // ------------------------------------------------------------------ | |
553 // Add new receiver and sort data by receiver's profile count. | |
554 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
555 // Add new receiver and sort data by receiver's counts when we have space | |
556 // for it otherwise replace the less called receiver (less called receiver | |
557 // is placed to the last array element which is not used). | |
558 // First array's element contains most called receiver. | |
559 int i = _limit; | |
560 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
561 _receiver[i] = _receiver[i-1]; | |
562 _receiver_count[i] = _receiver_count[i-1]; | |
563 } | |
564 _receiver[i] = receiver; | |
565 _receiver_count[i] = receiver_count; | |
566 if (_limit < MorphismLimit) _limit++; | |
567 } | |
568 | |
12966 | 569 |
570 void ciMethod::assert_virtual_call_type_ok(int bci) { | |
571 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || | |
572 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); | |
573 } | |
574 | |
575 void ciMethod::assert_call_type_ok(int bci) { | |
576 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || | |
577 java_code_at_bci(bci) == Bytecodes::_invokespecial || | |
578 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); | |
579 } | |
580 | |
581 /** | |
582 * Check whether profiling provides a type for the argument i to the | |
583 * call at bci bci | |
584 * | |
585 * @param bci bci of the call | |
586 * @param i argument number | |
587 * @return profiled type | |
588 * | |
589 * If the profile reports that the argument may be null, return false | |
590 * at least for now. | |
591 */ | |
592 ciKlass* ciMethod::argument_profiled_type(int bci, int i) { | |
593 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { | |
594 ciProfileData* data = method_data()->bci_to_data(bci); | |
595 if (data != NULL) { | |
596 if (data->is_VirtualCallTypeData()) { | |
597 assert_virtual_call_type_ok(bci); | |
598 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); | |
599 if (i >= call->number_of_arguments()) { | |
600 return NULL; | |
601 } | |
602 ciKlass* type = call->valid_argument_type(i); | |
603 if (type != NULL && !call->argument_maybe_null(i)) { | |
604 return type; | |
605 } | |
606 } else if (data->is_CallTypeData()) { | |
607 assert_call_type_ok(bci); | |
608 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); | |
609 if (i >= call->number_of_arguments()) { | |
610 return NULL; | |
611 } | |
612 ciKlass* type = call->valid_argument_type(i); | |
613 if (type != NULL && !call->argument_maybe_null(i)) { | |
614 return type; | |
615 } | |
616 } | |
617 } | |
618 } | |
619 return NULL; | |
620 } | |
621 | |
622 /** | |
623 * Check whether profiling provides a type for the return value from | |
624 * the call at bci bci | |
625 * | |
626 * @param bci bci of the call | |
627 * @return profiled type | |
628 * | |
629 * If the profile reports that the argument may be null, return false | |
630 * at least for now. | |
631 */ | |
632 ciKlass* ciMethod::return_profiled_type(int bci) { | |
633 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { | |
634 ciProfileData* data = method_data()->bci_to_data(bci); | |
635 if (data != NULL) { | |
636 if (data->is_VirtualCallTypeData()) { | |
637 assert_virtual_call_type_ok(bci); | |
638 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); | |
639 ciKlass* type = call->valid_return_type(); | |
640 if (type != NULL && !call->return_maybe_null()) { | |
641 return type; | |
642 } | |
643 } else if (data->is_CallTypeData()) { | |
644 assert_call_type_ok(bci); | |
645 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); | |
646 ciKlass* type = call->valid_return_type(); | |
647 if (type != NULL && !call->return_maybe_null()) { | |
648 return type; | |
649 } | |
650 } | |
651 } | |
652 } | |
653 return NULL; | |
654 } | |
655 | |
656 /** | |
657 * Check whether profiling provides a type for the parameter i | |
658 * | |
659 * @param i parameter number | |
660 * @return profiled type | |
661 * | |
662 * If the profile reports that the argument may be null, return false | |
663 * at least for now. | |
664 */ | |
665 ciKlass* ciMethod::parameter_profiled_type(int i) { | |
666 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { | |
667 ciParametersTypeData* parameters = method_data()->parameters_type_data(); | |
668 if (parameters != NULL && i < parameters->number_of_parameters()) { | |
669 ciKlass* type = parameters->valid_parameter_type(i); | |
670 if (type != NULL && !parameters->parameter_maybe_null(i)) { | |
671 return type; | |
672 } | |
673 } | |
674 } | |
675 return NULL; | |
676 } | |
677 | |
678 | |
0 | 679 // ------------------------------------------------------------------ |
680 // ciMethod::find_monomorphic_target | |
681 // | |
682 // Given a certain calling environment, find the monomorphic target | |
683 // for the call. Return NULL if the call is not monomorphic in | |
684 // its calling environment, or if there are only abstract methods. | |
685 // The returned method is never abstract. | |
686 // Note: If caller uses a non-null result, it must inform dependencies | |
687 // via assert_unique_concrete_method or assert_leaf_type. | |
688 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
689 ciInstanceKlass* callee_holder, | |
690 ciInstanceKlass* actual_recv) { | |
691 check_is_loaded(); | |
692 | |
693 if (actual_recv->is_interface()) { | |
694 // %%% We cannot trust interface types, yet. See bug 6312651. | |
695 return NULL; | |
696 } | |
697 | |
698 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
699 if (root_m == NULL) { | |
700 // Something went wrong looking up the actual receiver method. | |
701 return NULL; | |
702 } | |
703 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
704 | |
705 // Make certain quick checks even if UseCHA is false. | |
706 | |
707 // Is it private or final? | |
708 if (root_m->can_be_statically_bound()) { | |
709 return root_m; | |
710 } | |
711 | |
712 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
713 // Easy case. There is no other place to put a method, so don't bother | |
714 // to go through the VM_ENTRY_MARK and all the rest. | |
715 return root_m; | |
716 } | |
717 | |
718 // Array methods (clone, hashCode, etc.) are always statically bound. | |
719 // If we were to see an array type here, we'd return root_m. | |
720 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
721 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
722 // so there is no need to do the same job here. | |
723 | |
724 if (!UseCHA) return NULL; | |
725 | |
726 VM_ENTRY_MARK; | |
727 | |
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728 // Disable CHA for default methods for now |
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729 if (root_m->get_Method()->is_default_method()) { |
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730 return NULL; |
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731 } |
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732 |
0 | 733 methodHandle target; |
734 { | |
735 MutexLocker locker(Compile_lock); | |
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736 Klass* context = actual_recv->get_Klass(); |
0 | 737 target = Dependencies::find_unique_concrete_method(context, |
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738 root_m->get_Method()); |
0 | 739 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. |
740 } | |
741 | |
742 #ifndef PRODUCT | |
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743 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { |
0 | 744 tty->print("found a non-root unique target method"); |
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745 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); |
0 | 746 tty->print(" method = "); |
747 target->print_short_name(tty); | |
748 tty->cr(); | |
749 } | |
750 #endif //PRODUCT | |
751 | |
752 if (target() == NULL) { | |
753 return NULL; | |
754 } | |
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755 if (target() == root_m->get_Method()) { |
0 | 756 return root_m; |
757 } | |
758 if (!root_m->is_public() && | |
759 !root_m->is_protected()) { | |
760 // If we are going to reason about inheritance, it's easiest | |
761 // if the method in question is public, protected, or private. | |
762 // If the answer is not root_m, it is conservatively correct | |
763 // to return NULL, even if the CHA encountered irrelevant | |
764 // methods in other packages. | |
765 // %%% TO DO: Work out logic for package-private methods | |
766 // with the same name but different vtable indexes. | |
767 return NULL; | |
768 } | |
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769 return CURRENT_THREAD_ENV->get_method(target()); |
0 | 770 } |
771 | |
772 // ------------------------------------------------------------------ | |
773 // ciMethod::resolve_invoke | |
774 // | |
775 // Given a known receiver klass, find the target for the call. | |
776 // Return NULL if the call has no target or the target is abstract. | |
777 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
778 check_is_loaded(); | |
779 VM_ENTRY_MARK; | |
780 | |
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781 KlassHandle caller_klass (THREAD, caller->get_Klass()); |
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782 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); |
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783 KlassHandle h_resolved (THREAD, holder()->get_Klass()); |
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784 Symbol* h_name = name()->get_symbol(); |
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785 Symbol* h_signature = signature()->get_symbol(); |
0 | 786 |
787 methodHandle m; | |
788 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
789 // the vtable has not been setup, and the LinkResolver will fail. | |
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790 if (h_recv->oop_is_array() |
0 | 791 || |
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792 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { |
0 | 793 if (holder()->is_interface()) { |
794 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
795 } else { | |
796 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
797 } | |
798 } | |
799 | |
800 if (m.is_null()) { | |
801 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
802 return NULL; | |
803 } | |
804 | |
805 ciMethod* result = this; | |
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806 if (m() != get_Method()) { |
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807 result = CURRENT_THREAD_ENV->get_method(m()); |
0 | 808 } |
809 | |
810 // Don't return abstract methods because they aren't | |
811 // optimizable or interesting. | |
812 if (result->is_abstract()) { | |
813 return NULL; | |
814 } else { | |
815 return result; | |
816 } | |
817 } | |
818 | |
819 // ------------------------------------------------------------------ | |
820 // ciMethod::resolve_vtable_index | |
821 // | |
822 // Given a known receiver klass, find the vtable index for the call. | |
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823 // Return Method::invalid_vtable_index if the vtable_index is unknown. |
0 | 824 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { |
825 check_is_loaded(); | |
826 | |
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827 int vtable_index = Method::invalid_vtable_index; |
0 | 828 // Only do lookup if receiver klass has been linked. Otherwise, |
829 // the vtable has not been setup, and the LinkResolver will fail. | |
830 if (!receiver->is_interface() | |
831 && (!receiver->is_instance_klass() || | |
832 receiver->as_instance_klass()->is_linked())) { | |
833 VM_ENTRY_MARK; | |
834 | |
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835 KlassHandle caller_klass (THREAD, caller->get_Klass()); |
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836 KlassHandle h_recv (THREAD, receiver->get_Klass()); |
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837 Symbol* h_name = name()->get_symbol(); |
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838 Symbol* h_signature = signature()->get_symbol(); |
0 | 839 |
840 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
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841 if (vtable_index == Method::nonvirtual_vtable_index) { |
0 | 842 // A statically bound method. Return "no such index". |
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843 vtable_index = Method::invalid_vtable_index; |
0 | 844 } |
845 } | |
846 | |
847 return vtable_index; | |
848 } | |
849 | |
850 // ------------------------------------------------------------------ | |
851 // ciMethod::interpreter_call_site_count | |
852 int ciMethod::interpreter_call_site_count(int bci) { | |
853 if (method_data() != NULL) { | |
854 ResourceMark rm; | |
855 ciProfileData* data = method_data()->bci_to_data(bci); | |
856 if (data != NULL && data->is_CounterData()) { | |
857 return scale_count(data->as_CounterData()->count()); | |
858 } | |
859 } | |
860 return -1; // unknown | |
861 } | |
862 | |
863 // ------------------------------------------------------------------ | |
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864 // ciMethod::get_field_at_bci |
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865 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { |
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866 ciBytecodeStream iter(this); |
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867 iter.reset_to_bci(bci); |
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868 iter.next(); |
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869 return iter.get_field(will_link); |
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870 } |
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871 |
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872 // ------------------------------------------------------------------ |
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873 // ciMethod::get_method_at_bci |
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874 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { |
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875 ciBytecodeStream iter(this); |
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876 iter.reset_to_bci(bci); |
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877 iter.next(); |
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878 return iter.get_method(will_link, declared_signature); |
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879 } |
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880 |
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881 // ------------------------------------------------------------------ |
0 | 882 // Adjust a CounterData count to be commensurate with |
883 // interpreter_invocation_count. If the MDO exists for | |
884 // only 25% of the time the method exists, then the | |
885 // counts in the MDO should be scaled by 4X, so that | |
886 // they can be usefully and stably compared against the | |
887 // invocation counts in methods. | |
888 int ciMethod::scale_count(int count, float prof_factor) { | |
889 if (count > 0 && method_data() != NULL) { | |
1783 | 890 int counter_life; |
0 | 891 int method_life = interpreter_invocation_count(); |
1783 | 892 if (TieredCompilation) { |
893 // In tiered the MDO's life is measured directly, so just use the snapshotted counters | |
894 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); | |
895 } else { | |
896 int current_mileage = method_data()->current_mileage(); | |
897 int creation_mileage = method_data()->creation_mileage(); | |
898 counter_life = current_mileage - creation_mileage; | |
899 } | |
900 | |
0 | 901 // counter_life due to backedge_counter could be > method_life |
902 if (counter_life > method_life) | |
903 counter_life = method_life; | |
904 if (0 < counter_life && counter_life <= method_life) { | |
905 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
906 count = (count > 0) ? count : 1; | |
907 } | |
908 } | |
909 return count; | |
910 } | |
911 | |
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912 |
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913 // ------------------------------------------------------------------ |
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914 // ciMethod::is_special_get_caller_class_method |
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915 // |
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916 bool ciMethod::is_ignored_by_security_stack_walk() const { |
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917 check_is_loaded(); |
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918 VM_ENTRY_MARK; |
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919 return get_Method()->is_ignored_by_security_stack_walk(); |
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920 } |
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921 |
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922 |
0 | 923 // ------------------------------------------------------------------ |
710 | 924 // invokedynamic support |
1564 | 925 |
926 // ------------------------------------------------------------------ | |
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927 // ciMethod::is_method_handle_intrinsic |
710 | 928 // |
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929 // Return true if the method is an instance of the JVM-generated |
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930 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. |
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931 bool ciMethod::is_method_handle_intrinsic() const { |
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932 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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933 return (MethodHandles::is_signature_polymorphic(iid) && |
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934 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
710 | 935 } |
936 | |
1564 | 937 // ------------------------------------------------------------------ |
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938 // ciMethod::is_compiled_lambda_form |
1564 | 939 // |
940 // Return true if the method is a generated MethodHandle adapter. | |
6266
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941 // These are built by Java code. |
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942 bool ciMethod::is_compiled_lambda_form() const { |
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943 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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944 return iid == vmIntrinsics::_compiledLambdaForm; |
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945 } |
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946 |
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947 // ------------------------------------------------------------------ |
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948 // ciMethod::has_member_arg |
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949 // |
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950 // Return true if the method is a linker intrinsic like _linkToVirtual. |
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951 // These are built by the JVM. |
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952 bool ciMethod::has_member_arg() const { |
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953 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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954 return (MethodHandles::is_signature_polymorphic(iid) && |
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955 MethodHandles::has_member_arg(iid)); |
710 | 956 } |
957 | |
958 // ------------------------------------------------------------------ | |
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959 // ciMethod::ensure_method_data |
0 | 960 // |
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961 // Generate new MethodData* objects at compile time. |
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962 // Return true if allocation was successful or no MDO is required. |
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963 bool ciMethod::ensure_method_data(methodHandle h_m) { |
0 | 964 EXCEPTION_CONTEXT; |
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965 if (is_native() || is_abstract() || h_m()->is_accessor()) { |
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966 return true; |
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967 } |
0 | 968 if (h_m()->method_data() == NULL) { |
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969 Method::build_interpreter_method_data(h_m, THREAD); |
0 | 970 if (HAS_PENDING_EXCEPTION) { |
971 CLEAR_PENDING_EXCEPTION; | |
972 } | |
973 } | |
974 if (h_m()->method_data() != NULL) { | |
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975 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); |
0 | 976 _method_data->load_data(); |
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977 return true; |
0 | 978 } else { |
979 _method_data = CURRENT_ENV->get_empty_methodData(); | |
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980 return false; |
0 | 981 } |
982 } | |
983 | |
984 // public, retroactive version | |
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985 bool ciMethod::ensure_method_data() { |
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986 bool result = true; |
0 | 987 if (_method_data == NULL || _method_data->is_empty()) { |
988 GUARDED_VM_ENTRY({ | |
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989 result = ensure_method_data(get_Method()); |
0 | 990 }); |
991 } | |
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992 return result; |
0 | 993 } |
994 | |
995 | |
996 // ------------------------------------------------------------------ | |
997 // ciMethod::method_data | |
998 // | |
999 ciMethodData* ciMethod::method_data() { | |
1000 if (_method_data != NULL) { | |
1001 return _method_data; | |
1002 } | |
1003 VM_ENTRY_MARK; | |
1004 ciEnv* env = CURRENT_ENV; | |
1005 Thread* my_thread = JavaThread::current(); | |
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1006 methodHandle h_m(my_thread, get_Method()); |
0 | 1007 |
1008 if (h_m()->method_data() != NULL) { | |
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1009 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); |
0 | 1010 _method_data->load_data(); |
1011 } else { | |
1012 _method_data = CURRENT_ENV->get_empty_methodData(); | |
1013 } | |
1014 return _method_data; | |
1015 | |
1016 } | |
1017 | |
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1018 // ------------------------------------------------------------------ |
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1019 // ciMethod::method_data_or_null |
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1020 // Returns a pointer to ciMethodData if MDO exists on the VM side, |
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1021 // NULL otherwise. |
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1022 ciMethodData* ciMethod::method_data_or_null() { |
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1023 ciMethodData *md = method_data(); |
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1024 if (md->is_empty()) { |
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1025 return NULL; |
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1026 } |
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1027 return md; |
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1028 } |
0 | 1029 |
1030 // ------------------------------------------------------------------ | |
10105
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1031 // ciMethod::ensure_method_counters |
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1032 // |
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1033 MethodCounters* ciMethod::ensure_method_counters() { |
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1034 check_is_loaded(); |
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1035 VM_ENTRY_MARK; |
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1036 methodHandle mh(THREAD, get_Method()); |
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1037 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); |
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1038 return method_counters; |
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1039 } |
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1040 |
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1041 // ------------------------------------------------------------------ |
0 | 1042 // ciMethod::should_exclude |
1043 // | |
1044 // Should this method be excluded from compilation? | |
1045 bool ciMethod::should_exclude() { | |
1046 check_is_loaded(); | |
1047 VM_ENTRY_MARK; | |
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1048 methodHandle mh(THREAD, get_Method()); |
0 | 1049 bool ignore; |
1050 return CompilerOracle::should_exclude(mh, ignore); | |
1051 } | |
1052 | |
1053 // ------------------------------------------------------------------ | |
1054 // ciMethod::should_inline | |
1055 // | |
1056 // Should this method be inlined during compilation? | |
1057 bool ciMethod::should_inline() { | |
1058 check_is_loaded(); | |
1059 VM_ENTRY_MARK; | |
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1060 methodHandle mh(THREAD, get_Method()); |
0 | 1061 return CompilerOracle::should_inline(mh); |
1062 } | |
1063 | |
1064 // ------------------------------------------------------------------ | |
1065 // ciMethod::should_not_inline | |
1066 // | |
1067 // Should this method be disallowed from inlining during compilation? | |
1068 bool ciMethod::should_not_inline() { | |
1069 check_is_loaded(); | |
1070 VM_ENTRY_MARK; | |
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1071 methodHandle mh(THREAD, get_Method()); |
0 | 1072 return CompilerOracle::should_not_inline(mh); |
1073 } | |
1074 | |
1075 // ------------------------------------------------------------------ | |
1076 // ciMethod::should_print_assembly | |
1077 // | |
1078 // Should the compiler print the generated code for this method? | |
1079 bool ciMethod::should_print_assembly() { | |
1080 check_is_loaded(); | |
1081 VM_ENTRY_MARK; | |
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1082 methodHandle mh(THREAD, get_Method()); |
0 | 1083 return CompilerOracle::should_print(mh); |
1084 } | |
1085 | |
1086 // ------------------------------------------------------------------ | |
1087 // ciMethod::break_at_execute | |
1088 // | |
1089 // Should the compiler insert a breakpoint into the generated code | |
1090 // method? | |
1091 bool ciMethod::break_at_execute() { | |
1092 check_is_loaded(); | |
1093 VM_ENTRY_MARK; | |
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1094 methodHandle mh(THREAD, get_Method()); |
0 | 1095 return CompilerOracle::should_break_at(mh); |
1096 } | |
1097 | |
1098 // ------------------------------------------------------------------ | |
1099 // ciMethod::has_option | |
1100 // | |
1101 bool ciMethod::has_option(const char* option) { | |
1102 check_is_loaded(); | |
1103 VM_ENTRY_MARK; | |
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1104 methodHandle mh(THREAD, get_Method()); |
0 | 1105 return CompilerOracle::has_option_string(mh, option); |
1106 } | |
1107 | |
1108 // ------------------------------------------------------------------ | |
1109 // ciMethod::can_be_compiled | |
1110 // | |
1111 // Have previous compilations of this method succeeded? | |
1112 bool ciMethod::can_be_compiled() { | |
1113 check_is_loaded(); | |
1783 | 1114 ciEnv* env = CURRENT_ENV; |
1115 if (is_c1_compile(env->comp_level())) { | |
1116 return _is_c1_compilable; | |
1117 } | |
1118 return _is_c2_compilable; | |
0 | 1119 } |
1120 | |
1121 // ------------------------------------------------------------------ | |
1122 // ciMethod::set_not_compilable | |
1123 // | |
1124 // Tell the VM that this method cannot be compiled at all. | |
7998 | 1125 void ciMethod::set_not_compilable(const char* reason) { |
0 | 1126 check_is_loaded(); |
1127 VM_ENTRY_MARK; | |
1783 | 1128 ciEnv* env = CURRENT_ENV; |
1129 if (is_c1_compile(env->comp_level())) { | |
1130 _is_c1_compilable = false; | |
1131 } else { | |
1132 _is_c2_compilable = false; | |
1133 } | |
7998 | 1134 get_Method()->set_not_compilable(env->comp_level(), true, reason); |
0 | 1135 } |
1136 | |
1137 // ------------------------------------------------------------------ | |
1138 // ciMethod::can_be_osr_compiled | |
1139 // | |
1140 // Have previous compilations of this method succeeded? | |
1141 // | |
1142 // Implementation note: the VM does not currently keep track | |
1143 // of failed OSR compilations per bci. The entry_bci parameter | |
1144 // is currently unused. | |
1145 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
1146 check_is_loaded(); | |
1147 VM_ENTRY_MARK; | |
1783 | 1148 ciEnv* env = CURRENT_ENV; |
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1149 return !get_Method()->is_not_osr_compilable(env->comp_level()); |
0 | 1150 } |
1151 | |
1152 // ------------------------------------------------------------------ | |
1153 // ciMethod::has_compiled_code | |
1154 bool ciMethod::has_compiled_code() { | |
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1155 return instructions_size() > 0; |
0 | 1156 } |
1157 | |
1783 | 1158 int ciMethod::comp_level() { |
1159 check_is_loaded(); | |
1160 VM_ENTRY_MARK; | |
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1161 nmethod* nm = get_Method()->code(); |
1783 | 1162 if (nm != NULL) return nm->comp_level(); |
1163 return 0; | |
1164 } | |
1165 | |
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1166 int ciMethod::highest_osr_comp_level() { |
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1167 check_is_loaded(); |
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1168 VM_ENTRY_MARK; |
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1169 return get_Method()->highest_osr_comp_level(); |
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1170 } |
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1171 |
0 | 1172 // ------------------------------------------------------------------ |
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1173 // ciMethod::code_size_for_inlining |
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1174 // |
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1175 // Code size for inlining decisions. This method returns a code |
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1176 // size of 1 for methods which has the ForceInline annotation. |
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1177 int ciMethod::code_size_for_inlining() { |
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1178 check_is_loaded(); |
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1179 if (get_Method()->force_inline()) { |
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1180 return 1; |
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1181 } |
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1182 return code_size(); |
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1183 } |
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1184 |
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1185 // ------------------------------------------------------------------ |
0 | 1186 // ciMethod::instructions_size |
1748 | 1187 // |
1188 // This is a rough metric for "fat" methods, compared before inlining | |
1189 // with InlineSmallCode. The CodeBlob::code_size accessor includes | |
1190 // junk like exception handler, stubs, and constant table, which are | |
1191 // not highly relevant to an inlined method. So we use the more | |
1192 // specific accessor nmethod::insts_size. | |
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1193 int ciMethod::instructions_size() { |
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1194 if (_instructions_size == -1) { |
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1195 GUARDED_VM_ENTRY( |
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1196 nmethod* code = get_Method()->code(); |
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1197 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { |
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1198 _instructions_size = code->insts_end() - code->verified_entry_point(); |
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1199 } else { |
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1200 _instructions_size = 0; |
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1201 } |
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1202 ); |
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1203 } |
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1204 return _instructions_size; |
0 | 1205 } |
1206 | |
1207 // ------------------------------------------------------------------ | |
1208 // ciMethod::log_nmethod_identity | |
1209 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
1210 GUARDED_VM_ENTRY( | |
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1211 nmethod* code = get_Method()->code(); |
0 | 1212 if (code != NULL) { |
1213 code->log_identity(log); | |
1214 } | |
1215 ) | |
1216 } | |
1217 | |
1218 // ------------------------------------------------------------------ | |
1219 // ciMethod::is_not_reached | |
1220 bool ciMethod::is_not_reached(int bci) { | |
1221 check_is_loaded(); | |
1222 VM_ENTRY_MARK; | |
1223 return Interpreter::is_not_reached( | |
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1224 methodHandle(THREAD, get_Method()), bci); |
0 | 1225 } |
1226 | |
1227 // ------------------------------------------------------------------ | |
1228 // ciMethod::was_never_executed | |
1229 bool ciMethod::was_executed_more_than(int times) { | |
1230 VM_ENTRY_MARK; | |
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1231 return get_Method()->was_executed_more_than(times); |
0 | 1232 } |
1233 | |
1234 // ------------------------------------------------------------------ | |
1235 // ciMethod::has_unloaded_classes_in_signature | |
1236 bool ciMethod::has_unloaded_classes_in_signature() { | |
1237 VM_ENTRY_MARK; | |
1238 { | |
1239 EXCEPTION_MARK; | |
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1240 methodHandle m(THREAD, get_Method()); |
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1241 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); |
0 | 1242 if( HAS_PENDING_EXCEPTION ) { |
1243 CLEAR_PENDING_EXCEPTION; | |
1244 return true; // Declare that we may have unloaded classes | |
1245 } | |
1246 return has_unloaded; | |
1247 } | |
1248 } | |
1249 | |
1250 // ------------------------------------------------------------------ | |
1251 // ciMethod::is_klass_loaded | |
1252 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
1253 VM_ENTRY_MARK; | |
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1254 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); |
0 | 1255 } |
1256 | |
1257 // ------------------------------------------------------------------ | |
1258 // ciMethod::check_call | |
1259 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
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1260 // This method is used only in C2 from InlineTree::ok_to_inline, |
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1261 // and is only used under -Xcomp or -XX:CompileTheWorld. |
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1262 // It appears to fail when applied to an invokeinterface call site. |
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1263 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. |
0 | 1264 VM_ENTRY_MARK; |
1265 { | |
1266 EXCEPTION_MARK; | |
1267 HandleMark hm(THREAD); | |
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1268 constantPoolHandle pool (THREAD, get_Method()->constants()); |
0 | 1269 methodHandle spec_method; |
1270 KlassHandle spec_klass; | |
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1271 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); |
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1272 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); |
0 | 1273 if (HAS_PENDING_EXCEPTION) { |
1274 CLEAR_PENDING_EXCEPTION; | |
1275 return false; | |
1276 } else { | |
1277 return (spec_method->is_static() == is_static); | |
1278 } | |
1279 } | |
1280 return false; | |
1281 } | |
1282 | |
1283 // ------------------------------------------------------------------ | |
1284 // ciMethod::print_codes | |
1285 // | |
1286 // Print the bytecodes for this method. | |
1287 void ciMethod::print_codes_on(outputStream* st) { | |
1288 check_is_loaded(); | |
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1289 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) |
0 | 1290 } |
1291 | |
1292 | |
1293 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
1294 check_is_loaded(); \ | |
1295 VM_ENTRY_MARK; \ | |
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1296 return get_Method()->flag_accessor(); \ |
0 | 1297 } |
1298 | |
1299 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
1300 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
1301 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
1302 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
1303 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
1304 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
1305 | |
10278 | 1306 bool ciMethod::is_boxing_method() const { |
1307 if (holder()->is_box_klass()) { | |
1308 switch (intrinsic_id()) { | |
1309 case vmIntrinsics::_Boolean_valueOf: | |
1310 case vmIntrinsics::_Byte_valueOf: | |
1311 case vmIntrinsics::_Character_valueOf: | |
1312 case vmIntrinsics::_Short_valueOf: | |
1313 case vmIntrinsics::_Integer_valueOf: | |
1314 case vmIntrinsics::_Long_valueOf: | |
1315 case vmIntrinsics::_Float_valueOf: | |
1316 case vmIntrinsics::_Double_valueOf: | |
1317 return true; | |
1318 default: | |
1319 return false; | |
1320 } | |
1321 } | |
1322 return false; | |
1323 } | |
1324 | |
1325 bool ciMethod::is_unboxing_method() const { | |
1326 if (holder()->is_box_klass()) { | |
1327 switch (intrinsic_id()) { | |
1328 case vmIntrinsics::_booleanValue: | |
1329 case vmIntrinsics::_byteValue: | |
1330 case vmIntrinsics::_charValue: | |
1331 case vmIntrinsics::_shortValue: | |
1332 case vmIntrinsics::_intValue: | |
1333 case vmIntrinsics::_longValue: | |
1334 case vmIntrinsics::_floatValue: | |
1335 case vmIntrinsics::_doubleValue: | |
1336 return true; | |
1337 default: | |
1338 return false; | |
1339 } | |
1340 } | |
1341 return false; | |
1342 } | |
1343 | |
0 | 1344 BCEscapeAnalyzer *ciMethod::get_bcea() { |
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1345 #ifdef COMPILER2 |
0 | 1346 if (_bcea == NULL) { |
1347 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
1348 } | |
1349 return _bcea; | |
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1350 #else // COMPILER2 |
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1351 ShouldNotReachHere(); |
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1352 return NULL; |
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1353 #endif // COMPILER2 |
0 | 1354 } |
1355 | |
1356 ciMethodBlocks *ciMethod::get_method_blocks() { | |
1357 Arena *arena = CURRENT_ENV->arena(); | |
1358 if (_method_blocks == NULL) { | |
1359 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
1360 } | |
1361 return _method_blocks; | |
1362 } | |
1363 | |
1364 #undef FETCH_FLAG_FROM_VM | |
1365 | |
14232 | 1366 void ciMethod::dump_name_as_ascii(outputStream* st) { |
1367 Method* method = get_Method(); | |
1368 st->print("%s %s %s", | |
1369 method->klass_name()->as_quoted_ascii(), | |
1370 method->name()->as_quoted_ascii(), | |
1371 method->signature()->as_quoted_ascii()); | |
1372 } | |
1373 | |
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1374 void ciMethod::dump_replay_data(outputStream* st) { |
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1375 ResourceMark rm; |
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1376 Method* method = get_Method(); |
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1377 MethodCounters* mcs = method->method_counters(); |
14232 | 1378 st->print("ciMethod "); |
1379 dump_name_as_ascii(st); | |
1380 st->print_cr(" %d %d %d %d %d", | |
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1381 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), |
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1382 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), |
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1383 interpreter_invocation_count(), |
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1384 interpreter_throwout_count(), |
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1385 _instructions_size); |
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1386 } |
0 | 1387 |
1388 // ------------------------------------------------------------------ | |
1389 // ciMethod::print_codes | |
1390 // | |
1391 // Print a range of the bytecodes for this method. | |
1392 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
1393 check_is_loaded(); | |
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1394 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) |
0 | 1395 } |
1396 | |
1397 // ------------------------------------------------------------------ | |
1398 // ciMethod::print_name | |
1399 // | |
1400 // Print the name of this method, including signature and some flags. | |
1401 void ciMethod::print_name(outputStream* st) { | |
1402 check_is_loaded(); | |
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1403 GUARDED_VM_ENTRY(get_Method()->print_name(st);) |
0 | 1404 } |
1405 | |
1406 // ------------------------------------------------------------------ | |
1407 // ciMethod::print_short_name | |
1408 // | |
1409 // Print the name of this method, without signature. | |
1410 void ciMethod::print_short_name(outputStream* st) { | |
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1411 if (is_loaded()) { |
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1412 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); |
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1413 } else { |
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1414 // Fall back if method is not loaded. |
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1415 holder()->print_name_on(st); |
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1416 st->print("::"); |
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1417 name()->print_symbol_on(st); |
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1418 if (WizardMode) |
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1419 signature()->as_symbol()->print_symbol_on(st); |
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1420 } |
0 | 1421 } |
1422 | |
1423 // ------------------------------------------------------------------ | |
1424 // ciMethod::print_impl | |
1425 // | |
1426 // Implementation of the print method. | |
1427 void ciMethod::print_impl(outputStream* st) { | |
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1428 ciMetadata::print_impl(st); |
0 | 1429 st->print(" name="); |
1430 name()->print_symbol_on(st); | |
1431 st->print(" holder="); | |
1432 holder()->print_name_on(st); | |
1433 st->print(" signature="); | |
1434 signature()->as_symbol()->print_symbol_on(st); | |
1435 if (is_loaded()) { | |
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1436 st->print(" loaded=true"); |
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1437 st->print(" arg_size=%d", arg_size()); |
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1438 st->print(" flags="); |
0 | 1439 flags().print_member_flags(st); |
1440 } else { | |
1441 st->print(" loaded=false"); | |
1442 } | |
1443 } |