Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethod.cpp @ 6634:7f813940ac35
7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
Reviewed-by: kvn
| author | twisti |
|---|---|
| date | Tue, 28 Aug 2012 15:24:39 -0700 |
| parents | 1d7922586cf6 |
| children | c38f13903fdf da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/ciCallProfile.hpp" | |
| 27 #include "ci/ciExceptionHandler.hpp" | |
| 28 #include "ci/ciInstanceKlass.hpp" | |
| 29 #include "ci/ciMethod.hpp" | |
| 30 #include "ci/ciMethodBlocks.hpp" | |
| 31 #include "ci/ciMethodData.hpp" | |
| 32 #include "ci/ciMethodKlass.hpp" | |
| 33 #include "ci/ciStreams.hpp" | |
| 34 #include "ci/ciSymbol.hpp" | |
| 35 #include "ci/ciUtilities.hpp" | |
| 36 #include "classfile/systemDictionary.hpp" | |
| 37 #include "compiler/abstractCompiler.hpp" | |
| 38 #include "compiler/compilerOracle.hpp" | |
| 39 #include "compiler/methodLiveness.hpp" | |
| 40 #include "interpreter/interpreter.hpp" | |
| 41 #include "interpreter/linkResolver.hpp" | |
| 42 #include "interpreter/oopMapCache.hpp" | |
| 43 #include "memory/allocation.inline.hpp" | |
| 44 #include "memory/resourceArea.hpp" | |
| 45 #include "oops/generateOopMap.hpp" | |
| 46 #include "oops/oop.inline.hpp" | |
| 47 #include "prims/nativeLookup.hpp" | |
| 48 #include "runtime/deoptimization.hpp" | |
| 49 #include "utilities/bitMap.inline.hpp" | |
| 50 #include "utilities/xmlstream.hpp" | |
| 51 #ifdef COMPILER2 | |
| 52 #include "ci/bcEscapeAnalyzer.hpp" | |
| 53 #include "ci/ciTypeFlow.hpp" | |
| 54 #include "oops/methodOop.hpp" | |
| 55 #endif | |
| 56 #ifdef SHARK | |
| 57 #include "ci/ciTypeFlow.hpp" | |
| 58 #include "oops/methodOop.hpp" | |
| 59 #endif | |
| 0 | 60 |
| 61 // ciMethod | |
| 62 // | |
| 63 // This class represents a methodOop in the HotSpot virtual | |
| 64 // machine. | |
| 65 | |
| 66 | |
| 67 // ------------------------------------------------------------------ | |
| 68 // ciMethod::ciMethod | |
| 69 // | |
| 70 // Loaded method. | |
| 71 ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) { | |
| 72 assert(h_m() != NULL, "no null method"); | |
| 73 | |
| 74 // These fields are always filled in in loaded methods. | |
| 75 _flags = ciFlags(h_m()->access_flags()); | |
| 76 | |
| 77 // Easy to compute, so fill them in now. | |
| 78 _max_stack = h_m()->max_stack(); | |
| 79 _max_locals = h_m()->max_locals(); | |
| 80 _code_size = h_m()->code_size(); | |
| 81 _intrinsic_id = h_m()->intrinsic_id(); | |
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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 | |
| 109 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) { | |
| 110 _can_be_statically_bound = h_m()->can_be_statically_bound(); | |
| 111 } else { | |
| 112 // Have to use a conservative value in this case. | |
| 113 _can_be_statically_bound = false; | |
| 114 } | |
| 115 | |
| 116 // Adjust the definition of this condition to be more useful: | |
| 117 // %%% take these conditions into account in vtable generation | |
| 118 if (!_can_be_statically_bound && h_m()->is_private()) | |
| 119 _can_be_statically_bound = true; | |
| 120 if (_can_be_statically_bound && h_m()->is_abstract()) | |
| 121 _can_be_statically_bound = false; | |
| 122 | |
| 123 // generating _signature may allow GC and therefore move m. | |
| 124 // These fields are always filled in. | |
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125 _name = env->get_symbol(h_m()->name()); |
| 0 | 126 _holder = env->get_object(h_m()->method_holder())->as_instance_klass(); |
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127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); |
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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; | |
| 143 } | |
| 144 | |
| 145 | |
| 146 // ------------------------------------------------------------------ | |
| 147 // ciMethod::ciMethod | |
| 148 // | |
| 149 // Unloaded method. | |
| 150 ciMethod::ciMethod(ciInstanceKlass* holder, | |
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151 ciSymbol* name, |
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152 ciSymbol* signature, |
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153 ciInstanceKlass* accessor) : |
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154 ciObject(ciMethodKlass::make()), |
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155 _name( name), |
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156 _holder( holder), |
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157 _intrinsic_id( vmIntrinsics::_none), |
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158 _liveness( NULL), |
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159 _can_be_statically_bound(false), |
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160 _method_blocks( NULL), |
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161 _method_data( NULL) |
| 1692 | 162 #if defined(COMPILER2) || defined(SHARK) |
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163 , |
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164 _flow( NULL), |
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165 _bcea( NULL) |
| 1692 | 166 #endif // COMPILER2 || SHARK |
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167 { |
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168 // Usually holder and accessor are the same type but in some cases |
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169 // the holder has the wrong class loader (e.g. invokedynamic call |
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170 // sites) so we pass the accessor. |
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171 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); |
| 0 | 172 } |
| 173 | |
| 174 | |
| 175 // ------------------------------------------------------------------ | |
| 176 // ciMethod::load_code | |
| 177 // | |
| 178 // Load the bytecodes and exception handler table for this method. | |
| 179 void ciMethod::load_code() { | |
| 180 VM_ENTRY_MARK; | |
| 181 assert(is_loaded(), "only loaded methods have code"); | |
| 182 | |
| 183 methodOop me = get_methodOop(); | |
| 184 Arena* arena = CURRENT_THREAD_ENV->arena(); | |
| 185 | |
| 186 // Load the bytecodes. | |
| 187 _code = (address)arena->Amalloc(code_size()); | |
| 188 memcpy(_code, me->code_base(), code_size()); | |
| 189 | |
| 190 // Revert any breakpoint bytecodes in ci's copy | |
|
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191 if (me->number_of_breakpoints() > 0) { |
| 0 | 192 BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints(); |
| 193 for (; bp != NULL; bp = bp->next()) { | |
| 194 if (bp->match(me)) { | |
| 195 code_at_put(bp->bci(), bp->orig_bytecode()); | |
| 196 } | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 // And load the exception table. | |
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201 ExceptionTable exc_table(me); |
| 0 | 202 |
| 203 // Allocate one extra spot in our list of exceptions. This | |
| 204 // last entry will be used to represent the possibility that | |
| 205 // an exception escapes the method. See ciExceptionHandlerStream | |
| 206 // for details. | |
| 207 _exception_handlers = | |
| 208 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) | |
| 209 * (_handler_count + 1)); | |
| 210 if (_handler_count > 0) { | |
| 211 for (int i=0; i<_handler_count; i++) { | |
| 212 _exception_handlers[i] = new (arena) ciExceptionHandler( | |
| 213 holder(), | |
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214 /* start */ exc_table.start_pc(i), |
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215 /* limit */ exc_table.end_pc(i), |
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216 /* goto pc */ exc_table.handler_pc(i), |
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217 /* cp index */ exc_table.catch_type_index(i)); |
| 0 | 218 } |
| 219 } | |
| 220 | |
| 221 // Put an entry at the end of our list to represent the possibility | |
| 222 // of exceptional exit. | |
| 223 _exception_handlers[_handler_count] = | |
| 224 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); | |
| 225 | |
| 226 if (CIPrintMethodCodes) { | |
| 227 print_codes(); | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 | |
| 232 // ------------------------------------------------------------------ | |
| 233 // ciMethod::has_linenumber_table | |
| 234 // | |
| 235 // length unknown until decompression | |
| 236 bool ciMethod::has_linenumber_table() const { | |
| 237 check_is_loaded(); | |
| 238 VM_ENTRY_MARK; | |
| 239 return get_methodOop()->has_linenumber_table(); | |
| 240 } | |
| 241 | |
| 242 | |
| 243 // ------------------------------------------------------------------ | |
| 244 // ciMethod::compressed_linenumber_table | |
| 245 u_char* ciMethod::compressed_linenumber_table() const { | |
| 246 check_is_loaded(); | |
| 247 VM_ENTRY_MARK; | |
| 248 return get_methodOop()->compressed_linenumber_table(); | |
| 249 } | |
| 250 | |
| 251 | |
| 252 // ------------------------------------------------------------------ | |
| 253 // ciMethod::line_number_from_bci | |
| 254 int ciMethod::line_number_from_bci(int bci) const { | |
| 255 check_is_loaded(); | |
| 256 VM_ENTRY_MARK; | |
| 257 return get_methodOop()->line_number_from_bci(bci); | |
| 258 } | |
| 259 | |
| 260 | |
| 261 // ------------------------------------------------------------------ | |
| 262 // ciMethod::vtable_index | |
| 263 // | |
| 264 // Get the position of this method's entry in the vtable, if any. | |
| 265 int ciMethod::vtable_index() { | |
| 266 check_is_loaded(); | |
| 267 assert(holder()->is_linked(), "must be linked"); | |
| 268 VM_ENTRY_MARK; | |
| 269 return get_methodOop()->vtable_index(); | |
| 270 } | |
| 271 | |
| 272 | |
| 1692 | 273 #ifdef SHARK |
| 274 // ------------------------------------------------------------------ | |
| 275 // ciMethod::itable_index | |
| 276 // | |
| 277 // Get the position of this method's entry in the itable, if any. | |
| 278 int ciMethod::itable_index() { | |
| 279 check_is_loaded(); | |
| 280 assert(holder()->is_linked(), "must be linked"); | |
| 281 VM_ENTRY_MARK; | |
| 282 return klassItable::compute_itable_index(get_methodOop()); | |
| 283 } | |
| 284 #endif // SHARK | |
| 285 | |
| 286 | |
| 0 | 287 // ------------------------------------------------------------------ |
| 288 // ciMethod::native_entry | |
| 289 // | |
| 290 // Get the address of this method's native code, if any. | |
| 291 address ciMethod::native_entry() { | |
| 292 check_is_loaded(); | |
| 293 assert(flags().is_native(), "must be native method"); | |
| 294 VM_ENTRY_MARK; | |
| 295 methodOop method = get_methodOop(); | |
| 296 address entry = method->native_function(); | |
| 297 assert(entry != NULL, "must be valid entry point"); | |
| 298 return entry; | |
| 299 } | |
| 300 | |
| 301 | |
| 302 // ------------------------------------------------------------------ | |
| 303 // ciMethod::interpreter_entry | |
| 304 // | |
| 305 // Get the entry point for running this method in the interpreter. | |
| 306 address ciMethod::interpreter_entry() { | |
| 307 check_is_loaded(); | |
| 308 VM_ENTRY_MARK; | |
| 309 methodHandle mh(THREAD, get_methodOop()); | |
| 310 return Interpreter::entry_for_method(mh); | |
| 311 } | |
| 312 | |
| 313 | |
| 314 // ------------------------------------------------------------------ | |
| 315 // ciMethod::uses_balanced_monitors | |
| 316 // | |
| 317 // Does this method use monitors in a strict stack-disciplined manner? | |
| 318 bool ciMethod::has_balanced_monitors() { | |
| 319 check_is_loaded(); | |
| 320 if (_balanced_monitors) return true; | |
| 321 | |
| 322 // Analyze the method to see if monitors are used properly. | |
| 323 VM_ENTRY_MARK; | |
| 324 methodHandle method(THREAD, get_methodOop()); | |
| 325 assert(method->has_monitor_bytecodes(), "should have checked this"); | |
| 326 | |
| 327 // Check to see if a previous compilation computed the | |
| 328 // monitor-matching analysis. | |
| 329 if (method->guaranteed_monitor_matching()) { | |
| 330 _balanced_monitors = true; | |
| 331 return true; | |
| 332 } | |
| 333 | |
| 334 { | |
| 335 EXCEPTION_MARK; | |
| 336 ResourceMark rm(THREAD); | |
| 337 GeneratePairingInfo gpi(method); | |
| 338 gpi.compute_map(CATCH); | |
| 339 if (!gpi.monitor_safe()) { | |
| 340 return false; | |
| 341 } | |
| 342 method->set_guaranteed_monitor_matching(); | |
| 343 _balanced_monitors = true; | |
| 344 } | |
| 345 return true; | |
| 346 } | |
| 347 | |
| 348 | |
| 349 // ------------------------------------------------------------------ | |
| 350 // ciMethod::get_flow_analysis | |
| 351 ciTypeFlow* ciMethod::get_flow_analysis() { | |
| 1692 | 352 #if defined(COMPILER2) || defined(SHARK) |
| 0 | 353 if (_flow == NULL) { |
| 354 ciEnv* env = CURRENT_ENV; | |
| 355 _flow = new (env->arena()) ciTypeFlow(env, this); | |
| 356 _flow->do_flow(); | |
| 357 } | |
| 358 return _flow; | |
| 1692 | 359 #else // COMPILER2 || SHARK |
| 0 | 360 ShouldNotReachHere(); |
| 361 return NULL; | |
| 1692 | 362 #endif // COMPILER2 || SHARK |
| 0 | 363 } |
| 364 | |
| 365 | |
| 366 // ------------------------------------------------------------------ | |
| 367 // ciMethod::get_osr_flow_analysis | |
| 368 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { | |
| 1692 | 369 #if defined(COMPILER2) || defined(SHARK) |
| 0 | 370 // OSR entry points are always place after a call bytecode of some sort |
| 371 assert(osr_bci >= 0, "must supply valid OSR entry point"); | |
| 372 ciEnv* env = CURRENT_ENV; | |
| 373 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); | |
| 374 flow->do_flow(); | |
| 375 return flow; | |
| 1692 | 376 #else // COMPILER2 || SHARK |
| 0 | 377 ShouldNotReachHere(); |
| 378 return NULL; | |
| 1692 | 379 #endif // COMPILER2 || SHARK |
| 0 | 380 } |
| 381 | |
| 382 // ------------------------------------------------------------------ | |
| 991 | 383 // ciMethod::raw_liveness_at_bci |
| 0 | 384 // |
| 385 // Which local variables are live at a specific bci? | |
| 991 | 386 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { |
| 0 | 387 check_is_loaded(); |
| 388 if (_liveness == NULL) { | |
| 389 // Create the liveness analyzer. | |
| 390 Arena* arena = CURRENT_ENV->arena(); | |
| 391 _liveness = new (arena) MethodLiveness(arena, this); | |
| 392 _liveness->compute_liveness(); | |
| 393 } | |
| 991 | 394 return _liveness->get_liveness_at(bci); |
| 395 } | |
| 396 | |
| 397 // ------------------------------------------------------------------ | |
| 398 // ciMethod::liveness_at_bci | |
| 399 // | |
| 400 // Which local variables are live at a specific bci? When debugging | |
| 401 // will return true for all locals in some cases to improve debug | |
| 402 // information. | |
| 403 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { | |
| 404 MethodLivenessResult result = raw_liveness_at_bci(bci); | |
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405 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { |
| 0 | 406 // Keep all locals live for the user's edification and amusement. |
| 407 result.at_put_range(0, result.size(), true); | |
| 408 } | |
| 409 return result; | |
| 410 } | |
| 411 | |
| 412 // ciMethod::live_local_oops_at_bci | |
| 413 // | |
| 414 // find all the live oops in the locals array for a particular bci | |
| 415 // Compute what the interpreter believes by using the interpreter | |
| 416 // oopmap generator. This is used as a double check during osr to | |
| 417 // guard against conservative result from MethodLiveness making us | |
| 418 // think a dead oop is live. MethodLiveness is conservative in the | |
| 419 // sense that it may consider locals to be live which cannot be live, | |
| 420 // like in the case where a local could contain an oop or a primitive | |
| 421 // along different paths. In that case the local must be dead when | |
| 422 // those paths merge. Since the interpreter's viewpoint is used when | |
| 423 // gc'ing an interpreter frame we need to use its viewpoint during | |
| 424 // OSR when loading the locals. | |
| 425 | |
| 426 BitMap ciMethod::live_local_oops_at_bci(int bci) { | |
| 427 VM_ENTRY_MARK; | |
| 428 InterpreterOopMap mask; | |
| 429 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask); | |
| 430 int mask_size = max_locals(); | |
| 431 BitMap result(mask_size); | |
| 432 result.clear(); | |
| 433 int i; | |
| 434 for (i = 0; i < mask_size ; i++ ) { | |
| 435 if (mask.is_oop(i)) result.set_bit(i); | |
| 436 } | |
| 437 return result; | |
| 438 } | |
| 439 | |
| 440 | |
| 441 #ifdef COMPILER1 | |
| 442 // ------------------------------------------------------------------ | |
| 443 // ciMethod::bci_block_start | |
| 444 // | |
| 445 // Marks all bcis where a new basic block starts | |
| 446 const BitMap ciMethod::bci_block_start() { | |
| 447 check_is_loaded(); | |
| 448 if (_liveness == NULL) { | |
| 449 // Create the liveness analyzer. | |
| 450 Arena* arena = CURRENT_ENV->arena(); | |
| 451 _liveness = new (arena) MethodLiveness(arena, this); | |
| 452 _liveness->compute_liveness(); | |
| 453 } | |
| 454 | |
| 455 return _liveness->get_bci_block_start(); | |
| 456 } | |
| 457 #endif // COMPILER1 | |
| 458 | |
| 459 | |
| 460 // ------------------------------------------------------------------ | |
| 461 // ciMethod::call_profile_at_bci | |
| 462 // | |
| 463 // Get the ciCallProfile for the invocation of this method. | |
| 464 // Also reports receiver types for non-call type checks (if TypeProfileCasts). | |
| 465 ciCallProfile ciMethod::call_profile_at_bci(int bci) { | |
| 466 ResourceMark rm; | |
| 467 ciCallProfile result; | |
| 468 if (method_data() != NULL && method_data()->is_mature()) { | |
| 469 ciProfileData* data = method_data()->bci_to_data(bci); | |
| 470 if (data != NULL && data->is_CounterData()) { | |
| 471 // Every profiled call site has a counter. | |
| 472 int count = data->as_CounterData()->count(); | |
| 473 | |
| 474 if (!data->is_ReceiverTypeData()) { | |
| 475 result._receiver_count[0] = 0; // that's a definite zero | |
| 476 } else { // ReceiverTypeData is a subclass of CounterData | |
| 477 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); | |
| 478 // In addition, virtual call sites have receiver type information | |
| 479 int receivers_count_total = 0; | |
| 480 int morphism = 0; | |
| 1783 | 481 // Precompute morphism for the possible fixup |
| 0 | 482 for (uint i = 0; i < call->row_limit(); i++) { |
| 483 ciKlass* receiver = call->receiver(i); | |
| 484 if (receiver == NULL) continue; | |
| 1783 | 485 morphism++; |
| 486 } | |
| 487 int epsilon = 0; | |
| 488 if (TieredCompilation && ProfileInterpreter) { | |
| 489 // Interpreter and C1 treat final and special invokes differently. | |
| 490 // C1 will record a type, whereas the interpreter will just | |
| 491 // increment the count. Detect this case. | |
| 492 if (morphism == 1 && count > 0) { | |
| 493 epsilon = count; | |
| 494 count = 0; | |
| 495 } | |
| 496 } | |
| 497 for (uint i = 0; i < call->row_limit(); i++) { | |
| 498 ciKlass* receiver = call->receiver(i); | |
| 499 if (receiver == NULL) continue; | |
| 500 int rcount = call->receiver_count(i) + epsilon; | |
| 0 | 501 if (rcount == 0) rcount = 1; // Should be valid value |
| 502 receivers_count_total += rcount; | |
| 503 // Add the receiver to result data. | |
| 504 result.add_receiver(receiver, rcount); | |
| 505 // If we extend profiling to record methods, | |
| 506 // we will set result._method also. | |
| 507 } | |
| 508 // Determine call site's morphism. | |
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509 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) |
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510 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. |
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511 // The call site count is > 0 in the case of a polymorphic virtual call. |
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512 if (morphism > 0 && morphism == result._limit) { |
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513 // The morphism <= MorphismLimit. |
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514 if ((morphism < ciCallProfile::MorphismLimit) || |
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515 (morphism == ciCallProfile::MorphismLimit && count == 0)) { |
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516 #ifdef ASSERT |
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517 if (count > 0) { |
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518 this->print_short_name(tty); |
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519 tty->print_cr(" @ bci:%d", bci); |
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520 this->print_codes(); |
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521 assert(false, "this call site should not be polymorphic"); |
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522 } |
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523 #endif |
| 0 | 524 result._morphism = morphism; |
| 525 } | |
| 526 } | |
| 527 // Make the count consistent if this is a call profile. If count is | |
| 528 // zero or less, presume that this is a typecheck profile and | |
| 529 // do nothing. Otherwise, increase count to be the sum of all | |
| 530 // receiver's counts. | |
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531 if (count >= 0) { |
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532 count += receivers_count_total; |
| 0 | 533 } |
| 534 } | |
| 535 result._count = count; | |
| 536 } | |
| 537 } | |
| 538 return result; | |
| 539 } | |
| 540 | |
| 541 // ------------------------------------------------------------------ | |
| 542 // Add new receiver and sort data by receiver's profile count. | |
| 543 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { | |
| 544 // Add new receiver and sort data by receiver's counts when we have space | |
| 545 // for it otherwise replace the less called receiver (less called receiver | |
| 546 // is placed to the last array element which is not used). | |
| 547 // First array's element contains most called receiver. | |
| 548 int i = _limit; | |
| 549 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { | |
| 550 _receiver[i] = _receiver[i-1]; | |
| 551 _receiver_count[i] = _receiver_count[i-1]; | |
| 552 } | |
| 553 _receiver[i] = receiver; | |
| 554 _receiver_count[i] = receiver_count; | |
| 555 if (_limit < MorphismLimit) _limit++; | |
| 556 } | |
| 557 | |
| 558 // ------------------------------------------------------------------ | |
| 559 // ciMethod::find_monomorphic_target | |
| 560 // | |
| 561 // Given a certain calling environment, find the monomorphic target | |
| 562 // for the call. Return NULL if the call is not monomorphic in | |
| 563 // its calling environment, or if there are only abstract methods. | |
| 564 // The returned method is never abstract. | |
| 565 // Note: If caller uses a non-null result, it must inform dependencies | |
| 566 // via assert_unique_concrete_method or assert_leaf_type. | |
| 567 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, | |
| 568 ciInstanceKlass* callee_holder, | |
| 569 ciInstanceKlass* actual_recv) { | |
| 570 check_is_loaded(); | |
| 571 | |
| 572 if (actual_recv->is_interface()) { | |
| 573 // %%% We cannot trust interface types, yet. See bug 6312651. | |
| 574 return NULL; | |
| 575 } | |
| 576 | |
| 577 ciMethod* root_m = resolve_invoke(caller, actual_recv); | |
| 578 if (root_m == NULL) { | |
| 579 // Something went wrong looking up the actual receiver method. | |
| 580 return NULL; | |
| 581 } | |
| 582 assert(!root_m->is_abstract(), "resolve_invoke promise"); | |
| 583 | |
| 584 // Make certain quick checks even if UseCHA is false. | |
| 585 | |
| 586 // Is it private or final? | |
| 587 if (root_m->can_be_statically_bound()) { | |
| 588 return root_m; | |
| 589 } | |
| 590 | |
| 591 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { | |
| 592 // Easy case. There is no other place to put a method, so don't bother | |
| 593 // to go through the VM_ENTRY_MARK and all the rest. | |
| 594 return root_m; | |
| 595 } | |
| 596 | |
| 597 // Array methods (clone, hashCode, etc.) are always statically bound. | |
| 598 // If we were to see an array type here, we'd return root_m. | |
| 599 // However, this method processes only ciInstanceKlasses. (See 4962591.) | |
| 600 // The inline_native_clone intrinsic narrows Object to T[] properly, | |
| 601 // so there is no need to do the same job here. | |
| 602 | |
| 603 if (!UseCHA) return NULL; | |
| 604 | |
| 605 VM_ENTRY_MARK; | |
| 606 | |
| 607 methodHandle target; | |
| 608 { | |
| 609 MutexLocker locker(Compile_lock); | |
| 610 klassOop context = actual_recv->get_klassOop(); | |
| 611 target = Dependencies::find_unique_concrete_method(context, | |
| 612 root_m->get_methodOop()); | |
| 613 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. | |
| 614 } | |
| 615 | |
| 616 #ifndef PRODUCT | |
| 617 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) { | |
| 618 tty->print("found a non-root unique target method"); | |
| 619 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name()); | |
| 620 tty->print(" method = "); | |
| 621 target->print_short_name(tty); | |
| 622 tty->cr(); | |
| 623 } | |
| 624 #endif //PRODUCT | |
| 625 | |
| 626 if (target() == NULL) { | |
| 627 return NULL; | |
| 628 } | |
| 629 if (target() == root_m->get_methodOop()) { | |
| 630 return root_m; | |
| 631 } | |
| 632 if (!root_m->is_public() && | |
| 633 !root_m->is_protected()) { | |
| 634 // If we are going to reason about inheritance, it's easiest | |
| 635 // if the method in question is public, protected, or private. | |
| 636 // If the answer is not root_m, it is conservatively correct | |
| 637 // to return NULL, even if the CHA encountered irrelevant | |
| 638 // methods in other packages. | |
| 639 // %%% TO DO: Work out logic for package-private methods | |
| 640 // with the same name but different vtable indexes. | |
| 641 return NULL; | |
| 642 } | |
| 643 return CURRENT_THREAD_ENV->get_object(target())->as_method(); | |
| 644 } | |
| 645 | |
| 646 // ------------------------------------------------------------------ | |
| 647 // ciMethod::resolve_invoke | |
| 648 // | |
| 649 // Given a known receiver klass, find the target for the call. | |
| 650 // Return NULL if the call has no target or the target is abstract. | |
| 651 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { | |
| 652 check_is_loaded(); | |
| 653 VM_ENTRY_MARK; | |
| 654 | |
| 655 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
| 656 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop()); | |
| 657 KlassHandle h_resolved (THREAD, holder()->get_klassOop()); | |
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658 Symbol* h_name = name()->get_symbol(); |
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659 Symbol* h_signature = signature()->get_symbol(); |
| 0 | 660 |
| 661 methodHandle m; | |
| 662 // Only do exact lookup if receiver klass has been linked. Otherwise, | |
| 663 // the vtable has not been setup, and the LinkResolver will fail. | |
| 664 if (h_recv->oop_is_javaArray() | |
| 665 || | |
| 666 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { | |
| 667 if (holder()->is_interface()) { | |
| 668 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
| 669 } else { | |
| 670 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); | |
| 671 } | |
| 672 } | |
| 673 | |
| 674 if (m.is_null()) { | |
| 675 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) | |
| 676 return NULL; | |
| 677 } | |
| 678 | |
| 679 ciMethod* result = this; | |
| 680 if (m() != get_methodOop()) { | |
| 681 result = CURRENT_THREAD_ENV->get_object(m())->as_method(); | |
| 682 } | |
| 683 | |
| 684 // Don't return abstract methods because they aren't | |
| 685 // optimizable or interesting. | |
| 686 if (result->is_abstract()) { | |
| 687 return NULL; | |
| 688 } else { | |
| 689 return result; | |
| 690 } | |
| 691 } | |
| 692 | |
| 693 // ------------------------------------------------------------------ | |
| 694 // ciMethod::resolve_vtable_index | |
| 695 // | |
| 696 // Given a known receiver klass, find the vtable index for the call. | |
| 697 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown. | |
| 698 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { | |
| 699 check_is_loaded(); | |
| 700 | |
| 701 int vtable_index = methodOopDesc::invalid_vtable_index; | |
| 702 // Only do lookup if receiver klass has been linked. Otherwise, | |
| 703 // the vtable has not been setup, and the LinkResolver will fail. | |
| 704 if (!receiver->is_interface() | |
| 705 && (!receiver->is_instance_klass() || | |
| 706 receiver->as_instance_klass()->is_linked())) { | |
| 707 VM_ENTRY_MARK; | |
| 708 | |
| 709 KlassHandle caller_klass (THREAD, caller->get_klassOop()); | |
| 710 KlassHandle h_recv (THREAD, receiver->get_klassOop()); | |
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711 Symbol* h_name = name()->get_symbol(); |
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712 Symbol* h_signature = signature()->get_symbol(); |
| 0 | 713 |
| 714 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); | |
| 715 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) { | |
| 716 // A statically bound method. Return "no such index". | |
| 717 vtable_index = methodOopDesc::invalid_vtable_index; | |
| 718 } | |
| 719 } | |
| 720 | |
| 721 return vtable_index; | |
| 722 } | |
| 723 | |
| 724 // ------------------------------------------------------------------ | |
| 725 // ciMethod::interpreter_call_site_count | |
| 726 int ciMethod::interpreter_call_site_count(int bci) { | |
| 727 if (method_data() != NULL) { | |
| 728 ResourceMark rm; | |
| 729 ciProfileData* data = method_data()->bci_to_data(bci); | |
| 730 if (data != NULL && data->is_CounterData()) { | |
| 731 return scale_count(data->as_CounterData()->count()); | |
| 732 } | |
| 733 } | |
| 734 return -1; // unknown | |
| 735 } | |
| 736 | |
| 737 // ------------------------------------------------------------------ | |
| 738 // Adjust a CounterData count to be commensurate with | |
| 739 // interpreter_invocation_count. If the MDO exists for | |
| 740 // only 25% of the time the method exists, then the | |
| 741 // counts in the MDO should be scaled by 4X, so that | |
| 742 // they can be usefully and stably compared against the | |
| 743 // invocation counts in methods. | |
| 744 int ciMethod::scale_count(int count, float prof_factor) { | |
| 745 if (count > 0 && method_data() != NULL) { | |
| 1783 | 746 int counter_life; |
| 0 | 747 int method_life = interpreter_invocation_count(); |
| 1783 | 748 if (TieredCompilation) { |
| 749 // In tiered the MDO's life is measured directly, so just use the snapshotted counters | |
| 750 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); | |
| 751 } else { | |
| 752 int current_mileage = method_data()->current_mileage(); | |
| 753 int creation_mileage = method_data()->creation_mileage(); | |
| 754 counter_life = current_mileage - creation_mileage; | |
| 755 } | |
| 756 | |
| 0 | 757 // counter_life due to backedge_counter could be > method_life |
| 758 if (counter_life > method_life) | |
| 759 counter_life = method_life; | |
| 760 if (0 < counter_life && counter_life <= method_life) { | |
| 761 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); | |
| 762 count = (count > 0) ? count : 1; | |
| 763 } | |
| 764 } | |
| 765 return count; | |
| 766 } | |
| 767 | |
| 768 // ------------------------------------------------------------------ | |
| 710 | 769 // invokedynamic support |
| 1564 | 770 |
| 771 // ------------------------------------------------------------------ | |
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772 // ciMethod::is_method_handle_intrinsic |
| 710 | 773 // |
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774 // Return true if the method is an instance of the JVM-generated |
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775 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. |
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776 bool ciMethod::is_method_handle_intrinsic() const { |
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777 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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778 return (MethodHandles::is_signature_polymorphic(iid) && |
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779 MethodHandles::is_signature_polymorphic_intrinsic(iid)); |
| 710 | 780 } |
| 781 | |
| 1564 | 782 // ------------------------------------------------------------------ |
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783 // ciMethod::is_compiled_lambda_form |
| 1564 | 784 // |
| 785 // Return true if the method is a generated MethodHandle adapter. | |
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786 // These are built by Java code. |
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787 bool ciMethod::is_compiled_lambda_form() const { |
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788 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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789 return iid == vmIntrinsics::_compiledLambdaForm; |
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790 } |
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791 |
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792 // ------------------------------------------------------------------ |
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793 // ciMethod::has_member_arg |
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794 // |
|
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795 // Return true if the method is a linker intrinsic like _linkToVirtual. |
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796 // These are built by the JVM. |
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797 bool ciMethod::has_member_arg() const { |
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798 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded |
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799 return (MethodHandles::is_signature_polymorphic(iid) && |
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800 MethodHandles::has_member_arg(iid)); |
| 710 | 801 } |
| 802 | |
| 803 // ------------------------------------------------------------------ | |
|
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804 // ciMethod::ensure_method_data |
| 0 | 805 // |
| 806 // Generate new methodDataOop objects at compile time. | |
|
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807 // Return true if allocation was successful or no MDO is required. |
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808 bool ciMethod::ensure_method_data(methodHandle h_m) { |
| 0 | 809 EXCEPTION_CONTEXT; |
|
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810 if (is_native() || is_abstract() || h_m()->is_accessor()) return true; |
| 0 | 811 if (h_m()->method_data() == NULL) { |
| 812 methodOopDesc::build_interpreter_method_data(h_m, THREAD); | |
| 813 if (HAS_PENDING_EXCEPTION) { | |
| 814 CLEAR_PENDING_EXCEPTION; | |
| 815 } | |
| 816 } | |
| 817 if (h_m()->method_data() != NULL) { | |
| 818 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
| 819 _method_data->load_data(); | |
|
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820 return true; |
| 0 | 821 } else { |
| 822 _method_data = CURRENT_ENV->get_empty_methodData(); | |
|
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823 return false; |
| 0 | 824 } |
| 825 } | |
| 826 | |
| 827 // public, retroactive version | |
|
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828 bool ciMethod::ensure_method_data() { |
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829 bool result = true; |
| 0 | 830 if (_method_data == NULL || _method_data->is_empty()) { |
| 831 GUARDED_VM_ENTRY({ | |
|
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832 result = ensure_method_data(get_methodOop()); |
| 0 | 833 }); |
| 834 } | |
|
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835 return result; |
| 0 | 836 } |
| 837 | |
| 838 | |
| 839 // ------------------------------------------------------------------ | |
| 840 // ciMethod::method_data | |
| 841 // | |
| 842 ciMethodData* ciMethod::method_data() { | |
| 843 if (_method_data != NULL) { | |
| 844 return _method_data; | |
| 845 } | |
| 846 VM_ENTRY_MARK; | |
| 847 ciEnv* env = CURRENT_ENV; | |
| 848 Thread* my_thread = JavaThread::current(); | |
| 849 methodHandle h_m(my_thread, get_methodOop()); | |
| 850 | |
| 851 if (h_m()->method_data() != NULL) { | |
| 852 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data(); | |
| 853 _method_data->load_data(); | |
| 854 } else { | |
| 855 _method_data = CURRENT_ENV->get_empty_methodData(); | |
| 856 } | |
| 857 return _method_data; | |
| 858 | |
| 859 } | |
| 860 | |
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861 // ------------------------------------------------------------------ |
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862 // ciMethod::method_data_or_null |
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863 // Returns a pointer to ciMethodData if MDO exists on the VM side, |
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864 // NULL otherwise. |
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865 ciMethodData* ciMethod::method_data_or_null() { |
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866 ciMethodData *md = method_data(); |
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867 if (md->is_empty()) return NULL; |
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868 return md; |
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869 } |
| 0 | 870 |
| 871 // ------------------------------------------------------------------ | |
| 872 // ciMethod::will_link | |
| 873 // | |
| 874 // Will this method link in a specific calling context? | |
| 875 bool ciMethod::will_link(ciKlass* accessing_klass, | |
| 876 ciKlass* declared_method_holder, | |
| 877 Bytecodes::Code bc) { | |
| 878 if (!is_loaded()) { | |
| 879 // Method lookup failed. | |
| 880 return false; | |
| 881 } | |
| 882 | |
| 883 // The link checks have been front-loaded into the get_method | |
| 884 // call. This method (ciMethod::will_link()) will be removed | |
| 885 // in the future. | |
| 886 | |
| 887 return true; | |
| 888 } | |
| 889 | |
| 890 // ------------------------------------------------------------------ | |
| 891 // ciMethod::should_exclude | |
| 892 // | |
| 893 // Should this method be excluded from compilation? | |
| 894 bool ciMethod::should_exclude() { | |
| 895 check_is_loaded(); | |
| 896 VM_ENTRY_MARK; | |
| 897 methodHandle mh(THREAD, get_methodOop()); | |
| 898 bool ignore; | |
| 899 return CompilerOracle::should_exclude(mh, ignore); | |
| 900 } | |
| 901 | |
| 902 // ------------------------------------------------------------------ | |
| 903 // ciMethod::should_inline | |
| 904 // | |
| 905 // Should this method be inlined during compilation? | |
| 906 bool ciMethod::should_inline() { | |
| 907 check_is_loaded(); | |
| 908 VM_ENTRY_MARK; | |
| 909 methodHandle mh(THREAD, get_methodOop()); | |
| 910 return CompilerOracle::should_inline(mh); | |
| 911 } | |
| 912 | |
| 913 // ------------------------------------------------------------------ | |
| 914 // ciMethod::should_not_inline | |
| 915 // | |
| 916 // Should this method be disallowed from inlining during compilation? | |
| 917 bool ciMethod::should_not_inline() { | |
| 918 check_is_loaded(); | |
| 919 VM_ENTRY_MARK; | |
| 920 methodHandle mh(THREAD, get_methodOop()); | |
| 921 return CompilerOracle::should_not_inline(mh); | |
| 922 } | |
| 923 | |
| 924 // ------------------------------------------------------------------ | |
| 925 // ciMethod::should_print_assembly | |
| 926 // | |
| 927 // Should the compiler print the generated code for this method? | |
| 928 bool ciMethod::should_print_assembly() { | |
| 929 check_is_loaded(); | |
| 930 VM_ENTRY_MARK; | |
| 931 methodHandle mh(THREAD, get_methodOop()); | |
| 932 return CompilerOracle::should_print(mh); | |
| 933 } | |
| 934 | |
| 935 // ------------------------------------------------------------------ | |
| 936 // ciMethod::break_at_execute | |
| 937 // | |
| 938 // Should the compiler insert a breakpoint into the generated code | |
| 939 // method? | |
| 940 bool ciMethod::break_at_execute() { | |
| 941 check_is_loaded(); | |
| 942 VM_ENTRY_MARK; | |
| 943 methodHandle mh(THREAD, get_methodOop()); | |
| 944 return CompilerOracle::should_break_at(mh); | |
| 945 } | |
| 946 | |
| 947 // ------------------------------------------------------------------ | |
| 948 // ciMethod::has_option | |
| 949 // | |
| 950 bool ciMethod::has_option(const char* option) { | |
| 951 check_is_loaded(); | |
| 952 VM_ENTRY_MARK; | |
| 953 methodHandle mh(THREAD, get_methodOop()); | |
| 954 return CompilerOracle::has_option_string(mh, option); | |
| 955 } | |
| 956 | |
| 957 // ------------------------------------------------------------------ | |
| 958 // ciMethod::can_be_compiled | |
| 959 // | |
| 960 // Have previous compilations of this method succeeded? | |
| 961 bool ciMethod::can_be_compiled() { | |
| 962 check_is_loaded(); | |
| 1783 | 963 ciEnv* env = CURRENT_ENV; |
| 964 if (is_c1_compile(env->comp_level())) { | |
| 965 return _is_c1_compilable; | |
| 966 } | |
| 967 return _is_c2_compilable; | |
| 0 | 968 } |
| 969 | |
| 970 // ------------------------------------------------------------------ | |
| 971 // ciMethod::set_not_compilable | |
| 972 // | |
| 973 // Tell the VM that this method cannot be compiled at all. | |
| 974 void ciMethod::set_not_compilable() { | |
| 975 check_is_loaded(); | |
| 976 VM_ENTRY_MARK; | |
| 1783 | 977 ciEnv* env = CURRENT_ENV; |
| 978 if (is_c1_compile(env->comp_level())) { | |
| 979 _is_c1_compilable = false; | |
| 980 } else { | |
| 981 _is_c2_compilable = false; | |
| 982 } | |
| 983 get_methodOop()->set_not_compilable(env->comp_level()); | |
| 0 | 984 } |
| 985 | |
| 986 // ------------------------------------------------------------------ | |
| 987 // ciMethod::can_be_osr_compiled | |
| 988 // | |
| 989 // Have previous compilations of this method succeeded? | |
| 990 // | |
| 991 // Implementation note: the VM does not currently keep track | |
| 992 // of failed OSR compilations per bci. The entry_bci parameter | |
| 993 // is currently unused. | |
| 994 bool ciMethod::can_be_osr_compiled(int entry_bci) { | |
| 995 check_is_loaded(); | |
| 996 VM_ENTRY_MARK; | |
| 1783 | 997 ciEnv* env = CURRENT_ENV; |
| 998 return !get_methodOop()->is_not_osr_compilable(env->comp_level()); | |
| 0 | 999 } |
| 1000 | |
| 1001 // ------------------------------------------------------------------ | |
| 1002 // ciMethod::has_compiled_code | |
| 1003 bool ciMethod::has_compiled_code() { | |
| 1004 VM_ENTRY_MARK; | |
| 1005 return get_methodOop()->code() != NULL; | |
| 1006 } | |
| 1007 | |
| 1783 | 1008 int ciMethod::comp_level() { |
| 1009 check_is_loaded(); | |
| 1010 VM_ENTRY_MARK; | |
| 1011 nmethod* nm = get_methodOop()->code(); | |
| 1012 if (nm != NULL) return nm->comp_level(); | |
| 1013 return 0; | |
| 1014 } | |
| 1015 | |
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1016 int ciMethod::highest_osr_comp_level() { |
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1017 check_is_loaded(); |
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1018 VM_ENTRY_MARK; |
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1019 return get_methodOop()->highest_osr_comp_level(); |
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1020 } |
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1021 |
| 0 | 1022 // ------------------------------------------------------------------ |
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1023 // ciMethod::code_size_for_inlining |
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1024 // |
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1025 // Code size for inlining decisions. This method returns a code |
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1026 // size of 1 for methods which has the ForceInline annotation. |
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1027 int ciMethod::code_size_for_inlining() { |
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1028 check_is_loaded(); |
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1029 if (get_methodOop()->force_inline()) { |
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1030 return 1; |
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1031 } |
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1032 return code_size(); |
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1033 } |
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1034 |
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1035 // ------------------------------------------------------------------ |
| 0 | 1036 // ciMethod::instructions_size |
| 1748 | 1037 // |
| 1038 // This is a rough metric for "fat" methods, compared before inlining | |
| 1039 // with InlineSmallCode. The CodeBlob::code_size accessor includes | |
| 1040 // junk like exception handler, stubs, and constant table, which are | |
| 1041 // not highly relevant to an inlined method. So we use the more | |
| 1042 // specific accessor nmethod::insts_size. | |
| 1783 | 1043 int ciMethod::instructions_size(int comp_level) { |
| 0 | 1044 GUARDED_VM_ENTRY( |
| 1045 nmethod* code = get_methodOop()->code(); | |
| 1783 | 1046 if (code != NULL && (comp_level == CompLevel_any || comp_level == code->comp_level())) { |
|
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1047 return code->insts_end() - code->verified_entry_point(); |
| 0 | 1048 } |
| 1783 | 1049 return 0; |
| 0 | 1050 ) |
| 1051 } | |
| 1052 | |
| 1053 // ------------------------------------------------------------------ | |
| 1054 // ciMethod::log_nmethod_identity | |
| 1055 void ciMethod::log_nmethod_identity(xmlStream* log) { | |
| 1056 GUARDED_VM_ENTRY( | |
| 1057 nmethod* code = get_methodOop()->code(); | |
| 1058 if (code != NULL) { | |
| 1059 code->log_identity(log); | |
| 1060 } | |
| 1061 ) | |
| 1062 } | |
| 1063 | |
| 1064 // ------------------------------------------------------------------ | |
| 1065 // ciMethod::is_not_reached | |
| 1066 bool ciMethod::is_not_reached(int bci) { | |
| 1067 check_is_loaded(); | |
| 1068 VM_ENTRY_MARK; | |
| 1069 return Interpreter::is_not_reached( | |
| 1070 methodHandle(THREAD, get_methodOop()), bci); | |
| 1071 } | |
| 1072 | |
| 1073 // ------------------------------------------------------------------ | |
| 1074 // ciMethod::was_never_executed | |
| 1075 bool ciMethod::was_executed_more_than(int times) { | |
| 1076 VM_ENTRY_MARK; | |
| 1077 return get_methodOop()->was_executed_more_than(times); | |
| 1078 } | |
| 1079 | |
| 1080 // ------------------------------------------------------------------ | |
| 1081 // ciMethod::has_unloaded_classes_in_signature | |
| 1082 bool ciMethod::has_unloaded_classes_in_signature() { | |
| 1083 VM_ENTRY_MARK; | |
| 1084 { | |
| 1085 EXCEPTION_MARK; | |
| 1086 methodHandle m(THREAD, get_methodOop()); | |
| 1087 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); | |
| 1088 if( HAS_PENDING_EXCEPTION ) { | |
| 1089 CLEAR_PENDING_EXCEPTION; | |
| 1090 return true; // Declare that we may have unloaded classes | |
| 1091 } | |
| 1092 return has_unloaded; | |
| 1093 } | |
| 1094 } | |
| 1095 | |
| 1096 // ------------------------------------------------------------------ | |
| 1097 // ciMethod::is_klass_loaded | |
| 1098 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { | |
| 1099 VM_ENTRY_MARK; | |
| 1100 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved); | |
| 1101 } | |
| 1102 | |
| 1103 // ------------------------------------------------------------------ | |
| 1104 // ciMethod::check_call | |
| 1105 bool ciMethod::check_call(int refinfo_index, bool is_static) const { | |
| 1106 VM_ENTRY_MARK; | |
| 1107 { | |
| 1108 EXCEPTION_MARK; | |
| 1109 HandleMark hm(THREAD); | |
| 1110 constantPoolHandle pool (THREAD, get_methodOop()->constants()); | |
| 1111 methodHandle spec_method; | |
| 1112 KlassHandle spec_klass; | |
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1113 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); |
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1114 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); |
| 0 | 1115 if (HAS_PENDING_EXCEPTION) { |
| 1116 CLEAR_PENDING_EXCEPTION; | |
| 1117 return false; | |
| 1118 } else { | |
| 1119 return (spec_method->is_static() == is_static); | |
| 1120 } | |
| 1121 } | |
| 1122 return false; | |
| 1123 } | |
| 1124 | |
| 1125 // ------------------------------------------------------------------ | |
| 1126 // ciMethod::print_codes | |
| 1127 // | |
| 1128 // Print the bytecodes for this method. | |
| 1129 void ciMethod::print_codes_on(outputStream* st) { | |
| 1130 check_is_loaded(); | |
| 1131 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);) | |
| 1132 } | |
| 1133 | |
| 1134 | |
| 1135 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ | |
| 1136 check_is_loaded(); \ | |
| 1137 VM_ENTRY_MARK; \ | |
| 1138 return get_methodOop()->flag_accessor(); \ | |
| 1139 } | |
| 1140 | |
| 1141 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } | |
| 1142 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } | |
| 1143 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } | |
| 1144 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } | |
| 1145 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } | |
| 1146 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } | |
| 1147 | |
| 1148 BCEscapeAnalyzer *ciMethod::get_bcea() { | |
|
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1149 #ifdef COMPILER2 |
| 0 | 1150 if (_bcea == NULL) { |
| 1151 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); | |
| 1152 } | |
| 1153 return _bcea; | |
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1154 #else // COMPILER2 |
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1155 ShouldNotReachHere(); |
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1156 return NULL; |
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1157 #endif // COMPILER2 |
| 0 | 1158 } |
| 1159 | |
| 1160 ciMethodBlocks *ciMethod::get_method_blocks() { | |
| 1161 Arena *arena = CURRENT_ENV->arena(); | |
| 1162 if (_method_blocks == NULL) { | |
| 1163 _method_blocks = new (arena) ciMethodBlocks(arena, this); | |
| 1164 } | |
| 1165 return _method_blocks; | |
| 1166 } | |
| 1167 | |
| 1168 #undef FETCH_FLAG_FROM_VM | |
| 1169 | |
| 1170 | |
| 1171 // ------------------------------------------------------------------ | |
| 1172 // ciMethod::print_codes | |
| 1173 // | |
| 1174 // Print a range of the bytecodes for this method. | |
| 1175 void ciMethod::print_codes_on(int from, int to, outputStream* st) { | |
| 1176 check_is_loaded(); | |
| 1177 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);) | |
| 1178 } | |
| 1179 | |
| 1180 // ------------------------------------------------------------------ | |
| 1181 // ciMethod::print_name | |
| 1182 // | |
| 1183 // Print the name of this method, including signature and some flags. | |
| 1184 void ciMethod::print_name(outputStream* st) { | |
| 1185 check_is_loaded(); | |
| 1186 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);) | |
| 1187 } | |
| 1188 | |
| 1189 // ------------------------------------------------------------------ | |
| 1190 // ciMethod::print_short_name | |
| 1191 // | |
| 1192 // Print the name of this method, without signature. | |
| 1193 void ciMethod::print_short_name(outputStream* st) { | |
|
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1194 if (is_loaded()) { |
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1195 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);); |
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1196 } else { |
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1197 // Fall back if method is not loaded. |
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1198 holder()->print_name_on(st); |
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1199 st->print("::"); |
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1200 name()->print_symbol_on(st); |
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1201 if (WizardMode) |
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1202 signature()->as_symbol()->print_symbol_on(st); |
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1203 } |
| 0 | 1204 } |
| 1205 | |
| 1206 // ------------------------------------------------------------------ | |
| 1207 // ciMethod::print_impl | |
| 1208 // | |
| 1209 // Implementation of the print method. | |
| 1210 void ciMethod::print_impl(outputStream* st) { | |
| 1211 ciObject::print_impl(st); | |
| 1212 st->print(" name="); | |
| 1213 name()->print_symbol_on(st); | |
| 1214 st->print(" holder="); | |
| 1215 holder()->print_name_on(st); | |
| 1216 st->print(" signature="); | |
| 1217 signature()->as_symbol()->print_symbol_on(st); | |
| 1218 if (is_loaded()) { | |
|
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1219 st->print(" loaded=true"); |
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1220 st->print(" arg_size=%d", arg_size()); |
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1221 st->print(" flags="); |
| 0 | 1222 flags().print_member_flags(st); |
| 1223 } else { | |
| 1224 st->print(" loaded=false"); | |
| 1225 } | |
| 1226 } |