annotate src/share/vm/ci/ciMethod.cpp @ 3656:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 7f813940ac35
children 18fb7da42534
rev   line source
duke@0 1 /*
jiangli@3530 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1885 25 #include "precompiled.hpp"
stefank@1885 26 #include "ci/ciCallProfile.hpp"
stefank@1885 27 #include "ci/ciExceptionHandler.hpp"
stefank@1885 28 #include "ci/ciInstanceKlass.hpp"
stefank@1885 29 #include "ci/ciMethod.hpp"
stefank@1885 30 #include "ci/ciMethodBlocks.hpp"
stefank@1885 31 #include "ci/ciMethodData.hpp"
stefank@1885 32 #include "ci/ciStreams.hpp"
stefank@1885 33 #include "ci/ciSymbol.hpp"
stefank@1885 34 #include "ci/ciUtilities.hpp"
stefank@1885 35 #include "classfile/systemDictionary.hpp"
stefank@1885 36 #include "compiler/abstractCompiler.hpp"
stefank@1885 37 #include "compiler/compilerOracle.hpp"
stefank@1885 38 #include "compiler/methodLiveness.hpp"
stefank@1885 39 #include "interpreter/interpreter.hpp"
stefank@1885 40 #include "interpreter/linkResolver.hpp"
stefank@1885 41 #include "interpreter/oopMapCache.hpp"
stefank@1885 42 #include "memory/allocation.inline.hpp"
stefank@1885 43 #include "memory/resourceArea.hpp"
stefank@1885 44 #include "oops/generateOopMap.hpp"
stefank@1885 45 #include "oops/oop.inline.hpp"
stefank@1885 46 #include "prims/nativeLookup.hpp"
stefank@1885 47 #include "runtime/deoptimization.hpp"
stefank@1885 48 #include "utilities/bitMap.inline.hpp"
stefank@1885 49 #include "utilities/xmlstream.hpp"
stefank@1885 50 #ifdef COMPILER2
stefank@1885 51 #include "ci/bcEscapeAnalyzer.hpp"
stefank@1885 52 #include "ci/ciTypeFlow.hpp"
coleenp@3656 53 #include "oops/method.hpp"
stefank@1885 54 #endif
stefank@1885 55 #ifdef SHARK
stefank@1885 56 #include "ci/ciTypeFlow.hpp"
coleenp@3656 57 #include "oops/method.hpp"
stefank@1885 58 #endif
duke@0 59
duke@0 60 // ciMethod
duke@0 61 //
coleenp@3656 62 // This class represents a Method* in the HotSpot virtual
duke@0 63 // machine.
duke@0 64
duke@0 65
duke@0 66 // ------------------------------------------------------------------
duke@0 67 // ciMethod::ciMethod
duke@0 68 //
duke@0 69 // Loaded method.
coleenp@3656 70 ciMethod::ciMethod(methodHandle h_m) : ciMetadata(h_m()) {
duke@0 71 assert(h_m() != NULL, "no null method");
duke@0 72
duke@0 73 // These fields are always filled in in loaded methods.
duke@0 74 _flags = ciFlags(h_m()->access_flags());
duke@0 75
duke@0 76 // Easy to compute, so fill them in now.
duke@0 77 _max_stack = h_m()->max_stack();
duke@0 78 _max_locals = h_m()->max_locals();
duke@0 79 _code_size = h_m()->code_size();
duke@0 80 _intrinsic_id = h_m()->intrinsic_id();
jiangli@3530 81 _handler_count = h_m()->exception_table_length();
duke@0 82 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
duke@0 83 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
iveresov@1707 84 _is_c1_compilable = !h_m()->is_not_c1_compilable();
iveresov@1707 85 _is_c2_compilable = !h_m()->is_not_c2_compilable();
duke@0 86 // Lazy fields, filled in on demand. Require allocation.
duke@0 87 _code = NULL;
duke@0 88 _exception_handlers = NULL;
duke@0 89 _liveness = NULL;
duke@0 90 _method_blocks = NULL;
twisti@1616 91 #if defined(COMPILER2) || defined(SHARK)
duke@0 92 _flow = NULL;
kvn@1570 93 _bcea = NULL;
twisti@1616 94 #endif // COMPILER2 || SHARK
duke@0 95
kvn@780 96 ciEnv *env = CURRENT_ENV;
iveresov@1707 97 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
duke@0 98 // 6328518 check hotswap conditions under the right lock.
duke@0 99 MutexLocker locker(Compile_lock);
duke@0 100 if (Dependencies::check_evol_method(h_m()) != NULL) {
iveresov@1707 101 _is_c1_compilable = false;
iveresov@1707 102 _is_c2_compilable = false;
duke@0 103 }
duke@0 104 } else {
duke@0 105 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
duke@0 106 }
duke@0 107
coleenp@3656 108 if (InstanceKlass::cast(h_m()->method_holder())->is_linked()) {
duke@0 109 _can_be_statically_bound = h_m()->can_be_statically_bound();
duke@0 110 } else {
duke@0 111 // Have to use a conservative value in this case.
duke@0 112 _can_be_statically_bound = false;
duke@0 113 }
duke@0 114
duke@0 115 // Adjust the definition of this condition to be more useful:
duke@0 116 // %%% take these conditions into account in vtable generation
duke@0 117 if (!_can_be_statically_bound && h_m()->is_private())
duke@0 118 _can_be_statically_bound = true;
duke@0 119 if (_can_be_statically_bound && h_m()->is_abstract())
duke@0 120 _can_be_statically_bound = false;
duke@0 121
duke@0 122 // generating _signature may allow GC and therefore move m.
duke@0 123 // These fields are always filled in.
coleenp@2069 124 _name = env->get_symbol(h_m()->name());
coleenp@3656 125 _holder = env->get_instance_klass(h_m()->method_holder());
coleenp@2069 126 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
jrose@2557 127 constantPoolHandle cpool = h_m()->constants();
jrose@2557 128 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
duke@0 129 _method_data = NULL;
duke@0 130 // Take a snapshot of these values, so they will be commensurate with the MDO.
iveresov@1707 131 if (ProfileInterpreter || TieredCompilation) {
duke@0 132 int invcnt = h_m()->interpreter_invocation_count();
duke@0 133 // if the value overflowed report it as max int
duke@0 134 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
duke@0 135 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
duke@0 136 } else {
duke@0 137 _interpreter_invocation_count = 0;
duke@0 138 _interpreter_throwout_count = 0;
duke@0 139 }
duke@0 140 if (_interpreter_invocation_count == 0)
duke@0 141 _interpreter_invocation_count = 1;
duke@0 142 }
duke@0 143
duke@0 144
duke@0 145 // ------------------------------------------------------------------
duke@0 146 // ciMethod::ciMethod
duke@0 147 //
duke@0 148 // Unloaded method.
duke@0 149 ciMethod::ciMethod(ciInstanceKlass* holder,
twisti@2772 150 ciSymbol* name,
twisti@2772 151 ciSymbol* signature,
twisti@2772 152 ciInstanceKlass* accessor) :
coleenp@3656 153 ciMetadata((Metadata*)NULL),
twisti@2772 154 _name( name),
twisti@2772 155 _holder( holder),
twisti@2772 156 _intrinsic_id( vmIntrinsics::_none),
twisti@2772 157 _liveness( NULL),
twisti@2772 158 _can_be_statically_bound(false),
twisti@2772 159 _method_blocks( NULL),
twisti@2772 160 _method_data( NULL)
twisti@1616 161 #if defined(COMPILER2) || defined(SHARK)
twisti@2772 162 ,
twisti@2772 163 _flow( NULL),
twisti@2772 164 _bcea( NULL)
twisti@1616 165 #endif // COMPILER2 || SHARK
twisti@2772 166 {
twisti@2772 167 // Usually holder and accessor are the same type but in some cases
twisti@2772 168 // the holder has the wrong class loader (e.g. invokedynamic call
twisti@2772 169 // sites) so we pass the accessor.
twisti@2772 170 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
duke@0 171 }
duke@0 172
duke@0 173
duke@0 174 // ------------------------------------------------------------------
duke@0 175 // ciMethod::load_code
duke@0 176 //
duke@0 177 // Load the bytecodes and exception handler table for this method.
duke@0 178 void ciMethod::load_code() {
duke@0 179 VM_ENTRY_MARK;
duke@0 180 assert(is_loaded(), "only loaded methods have code");
duke@0 181
coleenp@3656 182 Method* me = get_Method();
duke@0 183 Arena* arena = CURRENT_THREAD_ENV->arena();
duke@0 184
duke@0 185 // Load the bytecodes.
duke@0 186 _code = (address)arena->Amalloc(code_size());
duke@0 187 memcpy(_code, me->code_base(), code_size());
duke@0 188
duke@0 189 // Revert any breakpoint bytecodes in ci's copy
kvn@27 190 if (me->number_of_breakpoints() > 0) {
coleenp@3656 191 BreakpointInfo* bp = InstanceKlass::cast(me->method_holder())->breakpoints();
duke@0 192 for (; bp != NULL; bp = bp->next()) {
duke@0 193 if (bp->match(me)) {
duke@0 194 code_at_put(bp->bci(), bp->orig_bytecode());
duke@0 195 }
duke@0 196 }
duke@0 197 }
duke@0 198
duke@0 199 // And load the exception table.
jiangli@3530 200 ExceptionTable exc_table(me);
duke@0 201
duke@0 202 // Allocate one extra spot in our list of exceptions. This
duke@0 203 // last entry will be used to represent the possibility that
duke@0 204 // an exception escapes the method. See ciExceptionHandlerStream
duke@0 205 // for details.
duke@0 206 _exception_handlers =
duke@0 207 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
duke@0 208 * (_handler_count + 1));
duke@0 209 if (_handler_count > 0) {
duke@0 210 for (int i=0; i<_handler_count; i++) {
duke@0 211 _exception_handlers[i] = new (arena) ciExceptionHandler(
duke@0 212 holder(),
jiangli@3530 213 /* start */ exc_table.start_pc(i),
jiangli@3530 214 /* limit */ exc_table.end_pc(i),
jiangli@3530 215 /* goto pc */ exc_table.handler_pc(i),
jiangli@3530 216 /* cp index */ exc_table.catch_type_index(i));
duke@0 217 }
duke@0 218 }
duke@0 219
duke@0 220 // Put an entry at the end of our list to represent the possibility
duke@0 221 // of exceptional exit.
duke@0 222 _exception_handlers[_handler_count] =
duke@0 223 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
duke@0 224
duke@0 225 if (CIPrintMethodCodes) {
duke@0 226 print_codes();
duke@0 227 }
duke@0 228 }
duke@0 229
duke@0 230
duke@0 231 // ------------------------------------------------------------------
duke@0 232 // ciMethod::has_linenumber_table
duke@0 233 //
duke@0 234 // length unknown until decompression
duke@0 235 bool ciMethod::has_linenumber_table() const {
duke@0 236 check_is_loaded();
duke@0 237 VM_ENTRY_MARK;
coleenp@3656 238 return get_Method()->has_linenumber_table();
duke@0 239 }
duke@0 240
duke@0 241
duke@0 242 // ------------------------------------------------------------------
duke@0 243 // ciMethod::compressed_linenumber_table
duke@0 244 u_char* ciMethod::compressed_linenumber_table() const {
duke@0 245 check_is_loaded();
duke@0 246 VM_ENTRY_MARK;
coleenp@3656 247 return get_Method()->compressed_linenumber_table();
duke@0 248 }
duke@0 249
duke@0 250
duke@0 251 // ------------------------------------------------------------------
duke@0 252 // ciMethod::line_number_from_bci
duke@0 253 int ciMethod::line_number_from_bci(int bci) const {
duke@0 254 check_is_loaded();
duke@0 255 VM_ENTRY_MARK;
coleenp@3656 256 return get_Method()->line_number_from_bci(bci);
duke@0 257 }
duke@0 258
duke@0 259
duke@0 260 // ------------------------------------------------------------------
duke@0 261 // ciMethod::vtable_index
duke@0 262 //
duke@0 263 // Get the position of this method's entry in the vtable, if any.
duke@0 264 int ciMethod::vtable_index() {
duke@0 265 check_is_loaded();
duke@0 266 assert(holder()->is_linked(), "must be linked");
duke@0 267 VM_ENTRY_MARK;
coleenp@3656 268 return get_Method()->vtable_index();
duke@0 269 }
duke@0 270
duke@0 271
twisti@1616 272 #ifdef SHARK
twisti@1616 273 // ------------------------------------------------------------------
twisti@1616 274 // ciMethod::itable_index
twisti@1616 275 //
twisti@1616 276 // Get the position of this method's entry in the itable, if any.
twisti@1616 277 int ciMethod::itable_index() {
twisti@1616 278 check_is_loaded();
twisti@1616 279 assert(holder()->is_linked(), "must be linked");
twisti@1616 280 VM_ENTRY_MARK;
coleenp@3656 281 return klassItable::compute_itable_index(get_Method());
twisti@1616 282 }
twisti@1616 283 #endif // SHARK
twisti@1616 284
twisti@1616 285
duke@0 286 // ------------------------------------------------------------------
duke@0 287 // ciMethod::native_entry
duke@0 288 //
duke@0 289 // Get the address of this method's native code, if any.
duke@0 290 address ciMethod::native_entry() {
duke@0 291 check_is_loaded();
duke@0 292 assert(flags().is_native(), "must be native method");
duke@0 293 VM_ENTRY_MARK;
coleenp@3656 294 Method* method = get_Method();
duke@0 295 address entry = method->native_function();
duke@0 296 assert(entry != NULL, "must be valid entry point");
duke@0 297 return entry;
duke@0 298 }
duke@0 299
duke@0 300
duke@0 301 // ------------------------------------------------------------------
duke@0 302 // ciMethod::interpreter_entry
duke@0 303 //
duke@0 304 // Get the entry point for running this method in the interpreter.
duke@0 305 address ciMethod::interpreter_entry() {
duke@0 306 check_is_loaded();
duke@0 307 VM_ENTRY_MARK;
coleenp@3656 308 methodHandle mh(THREAD, get_Method());
duke@0 309 return Interpreter::entry_for_method(mh);
duke@0 310 }
duke@0 311
duke@0 312
duke@0 313 // ------------------------------------------------------------------
duke@0 314 // ciMethod::uses_balanced_monitors
duke@0 315 //
duke@0 316 // Does this method use monitors in a strict stack-disciplined manner?
duke@0 317 bool ciMethod::has_balanced_monitors() {
duke@0 318 check_is_loaded();
duke@0 319 if (_balanced_monitors) return true;
duke@0 320
duke@0 321 // Analyze the method to see if monitors are used properly.
duke@0 322 VM_ENTRY_MARK;
coleenp@3656 323 methodHandle method(THREAD, get_Method());
duke@0 324 assert(method->has_monitor_bytecodes(), "should have checked this");
duke@0 325
duke@0 326 // Check to see if a previous compilation computed the
duke@0 327 // monitor-matching analysis.
duke@0 328 if (method->guaranteed_monitor_matching()) {
duke@0 329 _balanced_monitors = true;
duke@0 330 return true;
duke@0 331 }
duke@0 332
duke@0 333 {
duke@0 334 EXCEPTION_MARK;
duke@0 335 ResourceMark rm(THREAD);
duke@0 336 GeneratePairingInfo gpi(method);
duke@0 337 gpi.compute_map(CATCH);
duke@0 338 if (!gpi.monitor_safe()) {
duke@0 339 return false;
duke@0 340 }
duke@0 341 method->set_guaranteed_monitor_matching();
duke@0 342 _balanced_monitors = true;
duke@0 343 }
duke@0 344 return true;
duke@0 345 }
duke@0 346
duke@0 347
duke@0 348 // ------------------------------------------------------------------
duke@0 349 // ciMethod::get_flow_analysis
duke@0 350 ciTypeFlow* ciMethod::get_flow_analysis() {
twisti@1616 351 #if defined(COMPILER2) || defined(SHARK)
duke@0 352 if (_flow == NULL) {
duke@0 353 ciEnv* env = CURRENT_ENV;
duke@0 354 _flow = new (env->arena()) ciTypeFlow(env, this);
duke@0 355 _flow->do_flow();
duke@0 356 }
duke@0 357 return _flow;
twisti@1616 358 #else // COMPILER2 || SHARK
duke@0 359 ShouldNotReachHere();
duke@0 360 return NULL;
twisti@1616 361 #endif // COMPILER2 || SHARK
duke@0 362 }
duke@0 363
duke@0 364
duke@0 365 // ------------------------------------------------------------------
duke@0 366 // ciMethod::get_osr_flow_analysis
duke@0 367 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
twisti@1616 368 #if defined(COMPILER2) || defined(SHARK)
duke@0 369 // OSR entry points are always place after a call bytecode of some sort
duke@0 370 assert(osr_bci >= 0, "must supply valid OSR entry point");
duke@0 371 ciEnv* env = CURRENT_ENV;
duke@0 372 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
duke@0 373 flow->do_flow();
duke@0 374 return flow;
twisti@1616 375 #else // COMPILER2 || SHARK
duke@0 376 ShouldNotReachHere();
duke@0 377 return NULL;
twisti@1616 378 #endif // COMPILER2 || SHARK
duke@0 379 }
duke@0 380
duke@0 381 // ------------------------------------------------------------------
never@991 382 // ciMethod::raw_liveness_at_bci
duke@0 383 //
duke@0 384 // Which local variables are live at a specific bci?
never@991 385 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
duke@0 386 check_is_loaded();
duke@0 387 if (_liveness == NULL) {
duke@0 388 // Create the liveness analyzer.
duke@0 389 Arena* arena = CURRENT_ENV->arena();
duke@0 390 _liveness = new (arena) MethodLiveness(arena, this);
duke@0 391 _liveness->compute_liveness();
duke@0 392 }
never@991 393 return _liveness->get_liveness_at(bci);
never@991 394 }
never@991 395
never@991 396 // ------------------------------------------------------------------
never@991 397 // ciMethod::liveness_at_bci
never@991 398 //
never@991 399 // Which local variables are live at a specific bci? When debugging
never@991 400 // will return true for all locals in some cases to improve debug
never@991 401 // information.
never@991 402 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
never@991 403 MethodLivenessResult result = raw_liveness_at_bci(bci);
kvn@780 404 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
duke@0 405 // Keep all locals live for the user's edification and amusement.
duke@0 406 result.at_put_range(0, result.size(), true);
duke@0 407 }
duke@0 408 return result;
duke@0 409 }
duke@0 410
duke@0 411 // ciMethod::live_local_oops_at_bci
duke@0 412 //
duke@0 413 // find all the live oops in the locals array for a particular bci
duke@0 414 // Compute what the interpreter believes by using the interpreter
duke@0 415 // oopmap generator. This is used as a double check during osr to
duke@0 416 // guard against conservative result from MethodLiveness making us
duke@0 417 // think a dead oop is live. MethodLiveness is conservative in the
duke@0 418 // sense that it may consider locals to be live which cannot be live,
duke@0 419 // like in the case where a local could contain an oop or a primitive
duke@0 420 // along different paths. In that case the local must be dead when
duke@0 421 // those paths merge. Since the interpreter's viewpoint is used when
duke@0 422 // gc'ing an interpreter frame we need to use its viewpoint during
duke@0 423 // OSR when loading the locals.
duke@0 424
duke@0 425 BitMap ciMethod::live_local_oops_at_bci(int bci) {
duke@0 426 VM_ENTRY_MARK;
duke@0 427 InterpreterOopMap mask;
coleenp@3656 428 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
duke@0 429 int mask_size = max_locals();
duke@0 430 BitMap result(mask_size);
duke@0 431 result.clear();
duke@0 432 int i;
duke@0 433 for (i = 0; i < mask_size ; i++ ) {
duke@0 434 if (mask.is_oop(i)) result.set_bit(i);
duke@0 435 }
duke@0 436 return result;
duke@0 437 }
duke@0 438
duke@0 439
duke@0 440 #ifdef COMPILER1
duke@0 441 // ------------------------------------------------------------------
duke@0 442 // ciMethod::bci_block_start
duke@0 443 //
duke@0 444 // Marks all bcis where a new basic block starts
duke@0 445 const BitMap ciMethod::bci_block_start() {
duke@0 446 check_is_loaded();
duke@0 447 if (_liveness == NULL) {
duke@0 448 // Create the liveness analyzer.
duke@0 449 Arena* arena = CURRENT_ENV->arena();
duke@0 450 _liveness = new (arena) MethodLiveness(arena, this);
duke@0 451 _liveness->compute_liveness();
duke@0 452 }
duke@0 453
duke@0 454 return _liveness->get_bci_block_start();
duke@0 455 }
duke@0 456 #endif // COMPILER1
duke@0 457
duke@0 458
duke@0 459 // ------------------------------------------------------------------
duke@0 460 // ciMethod::call_profile_at_bci
duke@0 461 //
duke@0 462 // Get the ciCallProfile for the invocation of this method.
duke@0 463 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
duke@0 464 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
duke@0 465 ResourceMark rm;
duke@0 466 ciCallProfile result;
duke@0 467 if (method_data() != NULL && method_data()->is_mature()) {
duke@0 468 ciProfileData* data = method_data()->bci_to_data(bci);
duke@0 469 if (data != NULL && data->is_CounterData()) {
duke@0 470 // Every profiled call site has a counter.
duke@0 471 int count = data->as_CounterData()->count();
duke@0 472
duke@0 473 if (!data->is_ReceiverTypeData()) {
duke@0 474 result._receiver_count[0] = 0; // that's a definite zero
duke@0 475 } else { // ReceiverTypeData is a subclass of CounterData
duke@0 476 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
duke@0 477 // In addition, virtual call sites have receiver type information
duke@0 478 int receivers_count_total = 0;
duke@0 479 int morphism = 0;
iveresov@1707 480 // Precompute morphism for the possible fixup
duke@0 481 for (uint i = 0; i < call->row_limit(); i++) {
duke@0 482 ciKlass* receiver = call->receiver(i);
duke@0 483 if (receiver == NULL) continue;
iveresov@1707 484 morphism++;
iveresov@1707 485 }
iveresov@1707 486 int epsilon = 0;
iveresov@1707 487 if (TieredCompilation && ProfileInterpreter) {
iveresov@1707 488 // Interpreter and C1 treat final and special invokes differently.
iveresov@1707 489 // C1 will record a type, whereas the interpreter will just
iveresov@1707 490 // increment the count. Detect this case.
iveresov@1707 491 if (morphism == 1 && count > 0) {
iveresov@1707 492 epsilon = count;
iveresov@1707 493 count = 0;
iveresov@1707 494 }
iveresov@1707 495 }
iveresov@1707 496 for (uint i = 0; i < call->row_limit(); i++) {
iveresov@1707 497 ciKlass* receiver = call->receiver(i);
iveresov@1707 498 if (receiver == NULL) continue;
iveresov@1707 499 int rcount = call->receiver_count(i) + epsilon;
duke@0 500 if (rcount == 0) rcount = 1; // Should be valid value
duke@0 501 receivers_count_total += rcount;
duke@0 502 // Add the receiver to result data.
duke@0 503 result.add_receiver(receiver, rcount);
duke@0 504 // If we extend profiling to record methods,
duke@0 505 // we will set result._method also.
duke@0 506 }
duke@0 507 // Determine call site's morphism.
kvn@1206 508 // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
kvn@1206 509 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
kvn@1206 510 // The call site count is > 0 in the case of a polymorphic virtual call.
kvn@1206 511 if (morphism > 0 && morphism == result._limit) {
kvn@1206 512 // The morphism <= MorphismLimit.
kvn@1206 513 if ((morphism < ciCallProfile::MorphismLimit) ||
kvn@1206 514 (morphism == ciCallProfile::MorphismLimit && count == 0)) {
kvn@1206 515 #ifdef ASSERT
kvn@1206 516 if (count > 0) {
kvn@1251 517 this->print_short_name(tty);
kvn@1251 518 tty->print_cr(" @ bci:%d", bci);
kvn@1206 519 this->print_codes();
kvn@1206 520 assert(false, "this call site should not be polymorphic");
kvn@1206 521 }
kvn@1206 522 #endif
duke@0 523 result._morphism = morphism;
duke@0 524 }
duke@0 525 }
duke@0 526 // Make the count consistent if this is a call profile. If count is
duke@0 527 // zero or less, presume that this is a typecheck profile and
duke@0 528 // do nothing. Otherwise, increase count to be the sum of all
duke@0 529 // receiver's counts.
kvn@1206 530 if (count >= 0) {
kvn@1206 531 count += receivers_count_total;
duke@0 532 }
duke@0 533 }
duke@0 534 result._count = count;
duke@0 535 }
duke@0 536 }
duke@0 537 return result;
duke@0 538 }
duke@0 539
duke@0 540 // ------------------------------------------------------------------
duke@0 541 // Add new receiver and sort data by receiver's profile count.
duke@0 542 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
duke@0 543 // Add new receiver and sort data by receiver's counts when we have space
duke@0 544 // for it otherwise replace the less called receiver (less called receiver
duke@0 545 // is placed to the last array element which is not used).
duke@0 546 // First array's element contains most called receiver.
duke@0 547 int i = _limit;
duke@0 548 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
duke@0 549 _receiver[i] = _receiver[i-1];
duke@0 550 _receiver_count[i] = _receiver_count[i-1];
duke@0 551 }
duke@0 552 _receiver[i] = receiver;
duke@0 553 _receiver_count[i] = receiver_count;
duke@0 554 if (_limit < MorphismLimit) _limit++;
duke@0 555 }
duke@0 556
duke@0 557 // ------------------------------------------------------------------
duke@0 558 // ciMethod::find_monomorphic_target
duke@0 559 //
duke@0 560 // Given a certain calling environment, find the monomorphic target
duke@0 561 // for the call. Return NULL if the call is not monomorphic in
duke@0 562 // its calling environment, or if there are only abstract methods.
duke@0 563 // The returned method is never abstract.
duke@0 564 // Note: If caller uses a non-null result, it must inform dependencies
duke@0 565 // via assert_unique_concrete_method or assert_leaf_type.
duke@0 566 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
duke@0 567 ciInstanceKlass* callee_holder,
duke@0 568 ciInstanceKlass* actual_recv) {
duke@0 569 check_is_loaded();
duke@0 570
duke@0 571 if (actual_recv->is_interface()) {
duke@0 572 // %%% We cannot trust interface types, yet. See bug 6312651.
duke@0 573 return NULL;
duke@0 574 }
duke@0 575
duke@0 576 ciMethod* root_m = resolve_invoke(caller, actual_recv);
duke@0 577 if (root_m == NULL) {
duke@0 578 // Something went wrong looking up the actual receiver method.
duke@0 579 return NULL;
duke@0 580 }
duke@0 581 assert(!root_m->is_abstract(), "resolve_invoke promise");
duke@0 582
duke@0 583 // Make certain quick checks even if UseCHA is false.
duke@0 584
duke@0 585 // Is it private or final?
duke@0 586 if (root_m->can_be_statically_bound()) {
duke@0 587 return root_m;
duke@0 588 }
duke@0 589
duke@0 590 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
duke@0 591 // Easy case. There is no other place to put a method, so don't bother
duke@0 592 // to go through the VM_ENTRY_MARK and all the rest.
duke@0 593 return root_m;
duke@0 594 }
duke@0 595
duke@0 596 // Array methods (clone, hashCode, etc.) are always statically bound.
duke@0 597 // If we were to see an array type here, we'd return root_m.
duke@0 598 // However, this method processes only ciInstanceKlasses. (See 4962591.)
duke@0 599 // The inline_native_clone intrinsic narrows Object to T[] properly,
duke@0 600 // so there is no need to do the same job here.
duke@0 601
duke@0 602 if (!UseCHA) return NULL;
duke@0 603
duke@0 604 VM_ENTRY_MARK;
duke@0 605
duke@0 606 methodHandle target;
duke@0 607 {
duke@0 608 MutexLocker locker(Compile_lock);
coleenp@3656 609 Klass* context = actual_recv->get_Klass();
duke@0 610 target = Dependencies::find_unique_concrete_method(context,
coleenp@3656 611 root_m->get_Method());
duke@0 612 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
duke@0 613 }
duke@0 614
duke@0 615 #ifndef PRODUCT
coleenp@3656 616 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
duke@0 617 tty->print("found a non-root unique target method");
coleenp@3656 618 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
duke@0 619 tty->print(" method = ");
duke@0 620 target->print_short_name(tty);
duke@0 621 tty->cr();
duke@0 622 }
duke@0 623 #endif //PRODUCT
duke@0 624
duke@0 625 if (target() == NULL) {
duke@0 626 return NULL;
duke@0 627 }
coleenp@3656 628 if (target() == root_m->get_Method()) {
duke@0 629 return root_m;
duke@0 630 }
duke@0 631 if (!root_m->is_public() &&
duke@0 632 !root_m->is_protected()) {
duke@0 633 // If we are going to reason about inheritance, it's easiest
duke@0 634 // if the method in question is public, protected, or private.
duke@0 635 // If the answer is not root_m, it is conservatively correct
duke@0 636 // to return NULL, even if the CHA encountered irrelevant
duke@0 637 // methods in other packages.
duke@0 638 // %%% TO DO: Work out logic for package-private methods
duke@0 639 // with the same name but different vtable indexes.
duke@0 640 return NULL;
duke@0 641 }
coleenp@3656 642 return CURRENT_THREAD_ENV->get_method(target());
duke@0 643 }
duke@0 644
duke@0 645 // ------------------------------------------------------------------
duke@0 646 // ciMethod::resolve_invoke
duke@0 647 //
duke@0 648 // Given a known receiver klass, find the target for the call.
duke@0 649 // Return NULL if the call has no target or the target is abstract.
duke@0 650 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
duke@0 651 check_is_loaded();
duke@0 652 VM_ENTRY_MARK;
duke@0 653
coleenp@3656 654 KlassHandle caller_klass (THREAD, caller->get_Klass());
coleenp@3656 655 KlassHandle h_recv (THREAD, exact_receiver->get_Klass());
coleenp@3656 656 KlassHandle h_resolved (THREAD, holder()->get_Klass());
coleenp@2069 657 Symbol* h_name = name()->get_symbol();
coleenp@2069 658 Symbol* h_signature = signature()->get_symbol();
duke@0 659
duke@0 660 methodHandle m;
duke@0 661 // Only do exact lookup if receiver klass has been linked. Otherwise,
duke@0 662 // the vtable has not been setup, and the LinkResolver will fail.
coleenp@3656 663 if (h_recv->oop_is_array()
duke@0 664 ||
coleenp@3656 665 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
duke@0 666 if (holder()->is_interface()) {
duke@0 667 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
duke@0 668 } else {
duke@0 669 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
duke@0 670 }
duke@0 671 }
duke@0 672
duke@0 673 if (m.is_null()) {
duke@0 674 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
duke@0 675 return NULL;
duke@0 676 }
duke@0 677
duke@0 678 ciMethod* result = this;
coleenp@3656 679 if (m() != get_Method()) {
coleenp@3656 680 result = CURRENT_THREAD_ENV->get_method(m());
duke@0 681 }
duke@0 682
duke@0 683 // Don't return abstract methods because they aren't
duke@0 684 // optimizable or interesting.
duke@0 685 if (result->is_abstract()) {
duke@0 686 return NULL;
duke@0 687 } else {
duke@0 688 return result;
duke@0 689 }
duke@0 690 }
duke@0 691
duke@0 692 // ------------------------------------------------------------------
duke@0 693 // ciMethod::resolve_vtable_index
duke@0 694 //
duke@0 695 // Given a known receiver klass, find the vtable index for the call.
coleenp@3656 696 // Return Method::invalid_vtable_index if the vtable_index is unknown.
duke@0 697 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
duke@0 698 check_is_loaded();
duke@0 699
coleenp@3656 700 int vtable_index = Method::invalid_vtable_index;
duke@0 701 // Only do lookup if receiver klass has been linked. Otherwise,
duke@0 702 // the vtable has not been setup, and the LinkResolver will fail.
duke@0 703 if (!receiver->is_interface()
duke@0 704 && (!receiver->is_instance_klass() ||
duke@0 705 receiver->as_instance_klass()->is_linked())) {
duke@0 706 VM_ENTRY_MARK;
duke@0 707
coleenp@3656 708 KlassHandle caller_klass (THREAD, caller->get_Klass());
coleenp@3656 709 KlassHandle h_recv (THREAD, receiver->get_Klass());
coleenp@2069 710 Symbol* h_name = name()->get_symbol();
coleenp@2069 711 Symbol* h_signature = signature()->get_symbol();
duke@0 712
duke@0 713 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
coleenp@3656 714 if (vtable_index == Method::nonvirtual_vtable_index) {
duke@0 715 // A statically bound method. Return "no such index".
coleenp@3656 716 vtable_index = Method::invalid_vtable_index;
duke@0 717 }
duke@0 718 }
duke@0 719
duke@0 720 return vtable_index;
duke@0 721 }
duke@0 722
duke@0 723 // ------------------------------------------------------------------
duke@0 724 // ciMethod::interpreter_call_site_count
duke@0 725 int ciMethod::interpreter_call_site_count(int bci) {
duke@0 726 if (method_data() != NULL) {
duke@0 727 ResourceMark rm;
duke@0 728 ciProfileData* data = method_data()->bci_to_data(bci);
duke@0 729 if (data != NULL && data->is_CounterData()) {
duke@0 730 return scale_count(data->as_CounterData()->count());
duke@0 731 }
duke@0 732 }
duke@0 733 return -1; // unknown
duke@0 734 }
duke@0 735
duke@0 736 // ------------------------------------------------------------------
duke@0 737 // Adjust a CounterData count to be commensurate with
duke@0 738 // interpreter_invocation_count. If the MDO exists for
duke@0 739 // only 25% of the time the method exists, then the
duke@0 740 // counts in the MDO should be scaled by 4X, so that
duke@0 741 // they can be usefully and stably compared against the
duke@0 742 // invocation counts in methods.
duke@0 743 int ciMethod::scale_count(int count, float prof_factor) {
duke@0 744 if (count > 0 && method_data() != NULL) {
iveresov@1707 745 int counter_life;
duke@0 746 int method_life = interpreter_invocation_count();
iveresov@1707 747 if (TieredCompilation) {
iveresov@1707 748 // In tiered the MDO's life is measured directly, so just use the snapshotted counters
iveresov@1707 749 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
iveresov@1707 750 } else {
iveresov@1707 751 int current_mileage = method_data()->current_mileage();
iveresov@1707 752 int creation_mileage = method_data()->creation_mileage();
iveresov@1707 753 counter_life = current_mileage - creation_mileage;
iveresov@1707 754 }
iveresov@1707 755
duke@0 756 // counter_life due to backedge_counter could be > method_life
duke@0 757 if (counter_life > method_life)
duke@0 758 counter_life = method_life;
duke@0 759 if (0 < counter_life && counter_life <= method_life) {
duke@0 760 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
duke@0 761 count = (count > 0) ? count : 1;
duke@0 762 }
duke@0 763 }
duke@0 764 return count;
duke@0 765 }
duke@0 766
duke@0 767 // ------------------------------------------------------------------
jrose@710 768 // invokedynamic support
twisti@1485 769
twisti@1485 770 // ------------------------------------------------------------------
twisti@3582 771 // ciMethod::is_method_handle_intrinsic
jrose@710 772 //
twisti@3582 773 // Return true if the method is an instance of the JVM-generated
twisti@3582 774 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
twisti@3582 775 bool ciMethod::is_method_handle_intrinsic() const {
twisti@3582 776 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
twisti@3582 777 return (MethodHandles::is_signature_polymorphic(iid) &&
twisti@3582 778 MethodHandles::is_signature_polymorphic_intrinsic(iid));
jrose@710 779 }
jrose@710 780
twisti@1485 781 // ------------------------------------------------------------------
twisti@3582 782 // ciMethod::is_compiled_lambda_form
twisti@1485 783 //
twisti@1485 784 // Return true if the method is a generated MethodHandle adapter.
twisti@3582 785 // These are built by Java code.
twisti@3582 786 bool ciMethod::is_compiled_lambda_form() const {
twisti@3582 787 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
twisti@3582 788 return iid == vmIntrinsics::_compiledLambdaForm;
twisti@1152 789 }
twisti@1152 790
twisti@3582 791 // ------------------------------------------------------------------
twisti@3582 792 // ciMethod::has_member_arg
twisti@3582 793 //
twisti@3582 794 // Return true if the method is a linker intrinsic like _linkToVirtual.
twisti@3582 795 // These are built by the JVM.
twisti@3582 796 bool ciMethod::has_member_arg() const {
twisti@3582 797 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded
twisti@3582 798 return (MethodHandles::is_signature_polymorphic(iid) &&
twisti@3582 799 MethodHandles::has_member_arg(iid));
jrose@710 800 }
jrose@710 801
jrose@710 802 // ------------------------------------------------------------------
iveresov@1920 803 // ciMethod::ensure_method_data
duke@0 804 //
coleenp@3656 805 // Generate new MethodData* objects at compile time.
iveresov@1920 806 // Return true if allocation was successful or no MDO is required.
iveresov@1920 807 bool ciMethod::ensure_method_data(methodHandle h_m) {
duke@0 808 EXCEPTION_CONTEXT;
iveresov@1920 809 if (is_native() || is_abstract() || h_m()->is_accessor()) return true;
duke@0 810 if (h_m()->method_data() == NULL) {
coleenp@3656 811 Method::build_interpreter_method_data(h_m, THREAD);
duke@0 812 if (HAS_PENDING_EXCEPTION) {
duke@0 813 CLEAR_PENDING_EXCEPTION;
duke@0 814 }
duke@0 815 }
duke@0 816 if (h_m()->method_data() != NULL) {
coleenp@3656 817 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
duke@0 818 _method_data->load_data();
iveresov@1920 819 return true;
duke@0 820 } else {
duke@0 821 _method_data = CURRENT_ENV->get_empty_methodData();
iveresov@1920 822 return false;
duke@0 823 }
duke@0 824 }
duke@0 825
duke@0 826 // public, retroactive version
iveresov@1920 827 bool ciMethod::ensure_method_data() {
iveresov@1920 828 bool result = true;
duke@0 829 if (_method_data == NULL || _method_data->is_empty()) {
duke@0 830 GUARDED_VM_ENTRY({
coleenp@3656 831 result = ensure_method_data(get_Method());
duke@0 832 });
duke@0 833 }
iveresov@1920 834 return result;
duke@0 835 }
duke@0 836
duke@0 837
duke@0 838 // ------------------------------------------------------------------
duke@0 839 // ciMethod::method_data
duke@0 840 //
duke@0 841 ciMethodData* ciMethod::method_data() {
duke@0 842 if (_method_data != NULL) {
duke@0 843 return _method_data;
duke@0 844 }
duke@0 845 VM_ENTRY_MARK;
duke@0 846 ciEnv* env = CURRENT_ENV;
duke@0 847 Thread* my_thread = JavaThread::current();
coleenp@3656 848 methodHandle h_m(my_thread, get_Method());
duke@0 849
duke@0 850 if (h_m()->method_data() != NULL) {
coleenp@3656 851 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
duke@0 852 _method_data->load_data();
duke@0 853 } else {
duke@0 854 _method_data = CURRENT_ENV->get_empty_methodData();
duke@0 855 }
duke@0 856 return _method_data;
duke@0 857
duke@0 858 }
duke@0 859
iveresov@1920 860 // ------------------------------------------------------------------
iveresov@1920 861 // ciMethod::method_data_or_null
iveresov@1920 862 // Returns a pointer to ciMethodData if MDO exists on the VM side,
iveresov@1920 863 // NULL otherwise.
iveresov@1920 864 ciMethodData* ciMethod::method_data_or_null() {
iveresov@1920 865 ciMethodData *md = method_data();
iveresov@1920 866 if (md->is_empty()) return NULL;
iveresov@1920 867 return md;
iveresov@1920 868 }
duke@0 869
duke@0 870 // ------------------------------------------------------------------
duke@0 871 // ciMethod::will_link
duke@0 872 //
duke@0 873 // Will this method link in a specific calling context?
duke@0 874 bool ciMethod::will_link(ciKlass* accessing_klass,
duke@0 875 ciKlass* declared_method_holder,
duke@0 876 Bytecodes::Code bc) {
duke@0 877 if (!is_loaded()) {
duke@0 878 // Method lookup failed.
duke@0 879 return false;
duke@0 880 }
duke@0 881
duke@0 882 // The link checks have been front-loaded into the get_method
duke@0 883 // call. This method (ciMethod::will_link()) will be removed
duke@0 884 // in the future.
duke@0 885
duke@0 886 return true;
duke@0 887 }
duke@0 888
duke@0 889 // ------------------------------------------------------------------
duke@0 890 // ciMethod::should_exclude
duke@0 891 //
duke@0 892 // Should this method be excluded from compilation?
duke@0 893 bool ciMethod::should_exclude() {
duke@0 894 check_is_loaded();
duke@0 895 VM_ENTRY_MARK;
coleenp@3656 896 methodHandle mh(THREAD, get_Method());
duke@0 897 bool ignore;
duke@0 898 return CompilerOracle::should_exclude(mh, ignore);
duke@0 899 }
duke@0 900
duke@0 901 // ------------------------------------------------------------------
duke@0 902 // ciMethod::should_inline
duke@0 903 //
duke@0 904 // Should this method be inlined during compilation?
duke@0 905 bool ciMethod::should_inline() {
duke@0 906 check_is_loaded();
duke@0 907 VM_ENTRY_MARK;
coleenp@3656 908 methodHandle mh(THREAD, get_Method());
duke@0 909 return CompilerOracle::should_inline(mh);
duke@0 910 }
duke@0 911
duke@0 912 // ------------------------------------------------------------------
duke@0 913 // ciMethod::should_not_inline
duke@0 914 //
duke@0 915 // Should this method be disallowed from inlining during compilation?
duke@0 916 bool ciMethod::should_not_inline() {
duke@0 917 check_is_loaded();
duke@0 918 VM_ENTRY_MARK;
coleenp@3656 919 methodHandle mh(THREAD, get_Method());
duke@0 920 return CompilerOracle::should_not_inline(mh);
duke@0 921 }
duke@0 922
duke@0 923 // ------------------------------------------------------------------
duke@0 924 // ciMethod::should_print_assembly
duke@0 925 //
duke@0 926 // Should the compiler print the generated code for this method?
duke@0 927 bool ciMethod::should_print_assembly() {
duke@0 928 check_is_loaded();
duke@0 929 VM_ENTRY_MARK;
coleenp@3656 930 methodHandle mh(THREAD, get_Method());
duke@0 931 return CompilerOracle::should_print(mh);
duke@0 932 }
duke@0 933
duke@0 934 // ------------------------------------------------------------------
duke@0 935 // ciMethod::break_at_execute
duke@0 936 //
duke@0 937 // Should the compiler insert a breakpoint into the generated code
duke@0 938 // method?
duke@0 939 bool ciMethod::break_at_execute() {
duke@0 940 check_is_loaded();
duke@0 941 VM_ENTRY_MARK;
coleenp@3656 942 methodHandle mh(THREAD, get_Method());
duke@0 943 return CompilerOracle::should_break_at(mh);
duke@0 944 }
duke@0 945
duke@0 946 // ------------------------------------------------------------------
duke@0 947 // ciMethod::has_option
duke@0 948 //
duke@0 949 bool ciMethod::has_option(const char* option) {
duke@0 950 check_is_loaded();
duke@0 951 VM_ENTRY_MARK;
coleenp@3656 952 methodHandle mh(THREAD, get_Method());
duke@0 953 return CompilerOracle::has_option_string(mh, option);
duke@0 954 }
duke@0 955
duke@0 956 // ------------------------------------------------------------------
duke@0 957 // ciMethod::can_be_compiled
duke@0 958 //
duke@0 959 // Have previous compilations of this method succeeded?
duke@0 960 bool ciMethod::can_be_compiled() {
duke@0 961 check_is_loaded();
iveresov@1707 962 ciEnv* env = CURRENT_ENV;
iveresov@1707 963 if (is_c1_compile(env->comp_level())) {
iveresov@1707 964 return _is_c1_compilable;
iveresov@1707 965 }
iveresov@1707 966 return _is_c2_compilable;
duke@0 967 }
duke@0 968
duke@0 969 // ------------------------------------------------------------------
duke@0 970 // ciMethod::set_not_compilable
duke@0 971 //
duke@0 972 // Tell the VM that this method cannot be compiled at all.
duke@0 973 void ciMethod::set_not_compilable() {
duke@0 974 check_is_loaded();
duke@0 975 VM_ENTRY_MARK;
iveresov@1707 976 ciEnv* env = CURRENT_ENV;
iveresov@1707 977 if (is_c1_compile(env->comp_level())) {
iveresov@1707 978 _is_c1_compilable = false;
iveresov@1707 979 } else {
iveresov@1707 980 _is_c2_compilable = false;
iveresov@1707 981 }
coleenp@3656 982 get_Method()->set_not_compilable(env->comp_level());
duke@0 983 }
duke@0 984
duke@0 985 // ------------------------------------------------------------------
duke@0 986 // ciMethod::can_be_osr_compiled
duke@0 987 //
duke@0 988 // Have previous compilations of this method succeeded?
duke@0 989 //
duke@0 990 // Implementation note: the VM does not currently keep track
duke@0 991 // of failed OSR compilations per bci. The entry_bci parameter
duke@0 992 // is currently unused.
duke@0 993 bool ciMethod::can_be_osr_compiled(int entry_bci) {
duke@0 994 check_is_loaded();
duke@0 995 VM_ENTRY_MARK;
iveresov@1707 996 ciEnv* env = CURRENT_ENV;
coleenp@3656 997 return !get_Method()->is_not_osr_compilable(env->comp_level());
duke@0 998 }
duke@0 999
duke@0 1000 // ------------------------------------------------------------------
duke@0 1001 // ciMethod::has_compiled_code
duke@0 1002 bool ciMethod::has_compiled_code() {
duke@0 1003 VM_ENTRY_MARK;
coleenp@3656 1004 return get_Method()->code() != NULL;
duke@0 1005 }
duke@0 1006
iveresov@1707 1007 int ciMethod::comp_level() {
iveresov@1707 1008 check_is_loaded();
iveresov@1707 1009 VM_ENTRY_MARK;
coleenp@3656 1010 nmethod* nm = get_Method()->code();
iveresov@1707 1011 if (nm != NULL) return nm->comp_level();
iveresov@1707 1012 return 0;
iveresov@1707 1013 }
iveresov@1707 1014
iveresov@2563 1015 int ciMethod::highest_osr_comp_level() {
iveresov@2563 1016 check_is_loaded();
iveresov@2563 1017 VM_ENTRY_MARK;
coleenp@3656 1018 return get_Method()->highest_osr_comp_level();
iveresov@2563 1019 }
iveresov@2563 1020
duke@0 1021 // ------------------------------------------------------------------
twisti@2672 1022 // ciMethod::code_size_for_inlining
twisti@2672 1023 //
twisti@3582 1024 // Code size for inlining decisions. This method returns a code
twisti@3582 1025 // size of 1 for methods which has the ForceInline annotation.
twisti@2672 1026 int ciMethod::code_size_for_inlining() {
twisti@2672 1027 check_is_loaded();
coleenp@3656 1028 if (get_Method()->force_inline()) {
twisti@3582 1029 return 1;
twisti@2672 1030 }
twisti@2672 1031 return code_size();
twisti@2672 1032 }
twisti@2672 1033
twisti@2672 1034 // ------------------------------------------------------------------
duke@0 1035 // ciMethod::instructions_size
twisti@1672 1036 //
twisti@1672 1037 // This is a rough metric for "fat" methods, compared before inlining
twisti@1672 1038 // with InlineSmallCode. The CodeBlob::code_size accessor includes
twisti@1672 1039 // junk like exception handler, stubs, and constant table, which are
twisti@1672 1040 // not highly relevant to an inlined method. So we use the more
twisti@1672 1041 // specific accessor nmethod::insts_size.
iveresov@1707 1042 int ciMethod::instructions_size(int comp_level) {
duke@0 1043 GUARDED_VM_ENTRY(
coleenp@3656 1044 nmethod* code = get_Method()->code();
iveresov@1707 1045 if (code != NULL && (comp_level == CompLevel_any || comp_level == code->comp_level())) {
iveresov@1753 1046 return code->insts_end() - code->verified_entry_point();
duke@0 1047 }
iveresov@1707 1048 return 0;
duke@0 1049 )
duke@0 1050 }
duke@0 1051
duke@0 1052 // ------------------------------------------------------------------
duke@0 1053 // ciMethod::log_nmethod_identity
duke@0 1054 void ciMethod::log_nmethod_identity(xmlStream* log) {
duke@0 1055 GUARDED_VM_ENTRY(
coleenp@3656 1056 nmethod* code = get_Method()->code();
duke@0 1057 if (code != NULL) {
duke@0 1058 code->log_identity(log);
duke@0 1059 }
duke@0 1060 )
duke@0 1061 }
duke@0 1062
duke@0 1063 // ------------------------------------------------------------------
duke@0 1064 // ciMethod::is_not_reached
duke@0 1065 bool ciMethod::is_not_reached(int bci) {
duke@0 1066 check_is_loaded();
duke@0 1067 VM_ENTRY_MARK;
duke@0 1068 return Interpreter::is_not_reached(
coleenp@3656 1069 methodHandle(THREAD, get_Method()), bci);
duke@0 1070 }
duke@0 1071
duke@0 1072 // ------------------------------------------------------------------
duke@0 1073 // ciMethod::was_never_executed
duke@0 1074 bool ciMethod::was_executed_more_than(int times) {
duke@0 1075 VM_ENTRY_MARK;
coleenp@3656 1076 return get_Method()->was_executed_more_than(times);
duke@0 1077 }
duke@0 1078
duke@0 1079 // ------------------------------------------------------------------
duke@0 1080 // ciMethod::has_unloaded_classes_in_signature
duke@0 1081 bool ciMethod::has_unloaded_classes_in_signature() {
duke@0 1082 VM_ENTRY_MARK;
duke@0 1083 {
duke@0 1084 EXCEPTION_MARK;
coleenp@3656 1085 methodHandle m(THREAD, get_Method());
coleenp@3656 1086 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
duke@0 1087 if( HAS_PENDING_EXCEPTION ) {
duke@0 1088 CLEAR_PENDING_EXCEPTION;
duke@0 1089 return true; // Declare that we may have unloaded classes
duke@0 1090 }
duke@0 1091 return has_unloaded;
duke@0 1092 }
duke@0 1093 }
duke@0 1094
duke@0 1095 // ------------------------------------------------------------------
duke@0 1096 // ciMethod::is_klass_loaded
duke@0 1097 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
duke@0 1098 VM_ENTRY_MARK;
coleenp@3656 1099 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
duke@0 1100 }
duke@0 1101
duke@0 1102 // ------------------------------------------------------------------
duke@0 1103 // ciMethod::check_call
duke@0 1104 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
duke@0 1105 VM_ENTRY_MARK;
duke@0 1106 {
duke@0 1107 EXCEPTION_MARK;
duke@0 1108 HandleMark hm(THREAD);
coleenp@3656 1109 constantPoolHandle pool (THREAD, get_Method()->constants());
duke@0 1110 methodHandle spec_method;
duke@0 1111 KlassHandle spec_klass;
twisti@3582 1112 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
twisti@3582 1113 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
duke@0 1114 if (HAS_PENDING_EXCEPTION) {
duke@0 1115 CLEAR_PENDING_EXCEPTION;
duke@0 1116 return false;
duke@0 1117 } else {
duke@0 1118 return (spec_method->is_static() == is_static);
duke@0 1119 }
duke@0 1120 }
duke@0 1121 return false;
duke@0 1122 }
duke@0 1123
duke@0 1124 // ------------------------------------------------------------------
duke@0 1125 // ciMethod::print_codes
duke@0 1126 //
duke@0 1127 // Print the bytecodes for this method.
duke@0 1128 void ciMethod::print_codes_on(outputStream* st) {
duke@0 1129 check_is_loaded();
coleenp@3656 1130 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
duke@0 1131 }
duke@0 1132
duke@0 1133
duke@0 1134 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
duke@0 1135 check_is_loaded(); \
duke@0 1136 VM_ENTRY_MARK; \
coleenp@3656 1137 return get_Method()->flag_accessor(); \
duke@0 1138 }
duke@0 1139
duke@0 1140 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
duke@0 1141 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
duke@0 1142 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
duke@0 1143 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
duke@0 1144 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
duke@0 1145 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
duke@0 1146
duke@0 1147 BCEscapeAnalyzer *ciMethod::get_bcea() {
kvn@1570 1148 #ifdef COMPILER2
duke@0 1149 if (_bcea == NULL) {
duke@0 1150 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
duke@0 1151 }
duke@0 1152 return _bcea;
kvn@1570 1153 #else // COMPILER2
kvn@1570 1154 ShouldNotReachHere();
kvn@1570 1155 return NULL;
kvn@1570 1156 #endif // COMPILER2
duke@0 1157 }
duke@0 1158
duke@0 1159 ciMethodBlocks *ciMethod::get_method_blocks() {
duke@0 1160 Arena *arena = CURRENT_ENV->arena();
duke@0 1161 if (_method_blocks == NULL) {
duke@0 1162 _method_blocks = new (arena) ciMethodBlocks(arena, this);
duke@0 1163 }
duke@0 1164 return _method_blocks;
duke@0 1165 }
duke@0 1166
duke@0 1167 #undef FETCH_FLAG_FROM_VM
duke@0 1168
duke@0 1169
duke@0 1170 // ------------------------------------------------------------------
duke@0 1171 // ciMethod::print_codes
duke@0 1172 //
duke@0 1173 // Print a range of the bytecodes for this method.
duke@0 1174 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
duke@0 1175 check_is_loaded();
coleenp@3656 1176 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
duke@0 1177 }
duke@0 1178
duke@0 1179 // ------------------------------------------------------------------
duke@0 1180 // ciMethod::print_name
duke@0 1181 //
duke@0 1182 // Print the name of this method, including signature and some flags.
duke@0 1183 void ciMethod::print_name(outputStream* st) {
duke@0 1184 check_is_loaded();
coleenp@3656 1185 GUARDED_VM_ENTRY(get_Method()->print_name(st);)
duke@0 1186 }
duke@0 1187
duke@0 1188 // ------------------------------------------------------------------
duke@0 1189 // ciMethod::print_short_name
duke@0 1190 //
duke@0 1191 // Print the name of this method, without signature.
duke@0 1192 void ciMethod::print_short_name(outputStream* st) {
twisti@3582 1193 if (is_loaded()) {
coleenp@3656 1194 GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
twisti@3582 1195 } else {
twisti@3582 1196 // Fall back if method is not loaded.
twisti@3582 1197 holder()->print_name_on(st);
twisti@3582 1198 st->print("::");
twisti@3582 1199 name()->print_symbol_on(st);
twisti@3582 1200 if (WizardMode)
twisti@3582 1201 signature()->as_symbol()->print_symbol_on(st);
twisti@3582 1202 }
duke@0 1203 }
duke@0 1204
duke@0 1205 // ------------------------------------------------------------------
duke@0 1206 // ciMethod::print_impl
duke@0 1207 //
duke@0 1208 // Implementation of the print method.
duke@0 1209 void ciMethod::print_impl(outputStream* st) {
coleenp@3656 1210 ciMetadata::print_impl(st);
duke@0 1211 st->print(" name=");
duke@0 1212 name()->print_symbol_on(st);
duke@0 1213 st->print(" holder=");
duke@0 1214 holder()->print_name_on(st);
duke@0 1215 st->print(" signature=");
duke@0 1216 signature()->as_symbol()->print_symbol_on(st);
duke@0 1217 if (is_loaded()) {
twisti@3641 1218 st->print(" loaded=true");
twisti@3641 1219 st->print(" arg_size=%d", arg_size());
twisti@3641 1220 st->print(" flags=");
duke@0 1221 flags().print_member_flags(st);
duke@0 1222 } else {
duke@0 1223 st->print(" loaded=false");
duke@0 1224 }
duke@0 1225 }