1 /*
   2  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "ci/ciCallProfile.hpp"
  27 #include "ci/ciExceptionHandler.hpp"
  28 #include "ci/ciInstanceKlass.hpp"
  29 #include "ci/ciMethod.hpp"
  30 #include "ci/ciMethodBlocks.hpp"
  31 #include "ci/ciMethodData.hpp"
  32 #include "ci/ciStreams.hpp"
  33 #include "ci/ciSymbol.hpp"
  34 #include "ci/ciReplay.hpp"
  35 #include "ci/ciUtilities.hpp"
  36 #include "classfile/systemDictionary.hpp"
  37 #include "compiler/abstractCompiler.hpp"
  38 #include "compiler/methodLiveness.hpp"
  39 #include "interpreter/interpreter.hpp"
  40 #include "interpreter/linkResolver.hpp"
  41 #include "interpreter/oopMapCache.hpp"
  42 #include "memory/allocation.inline.hpp"
  43 #include "memory/resourceArea.hpp"
  44 #include "oops/generateOopMap.hpp"
  45 #include "oops/oop.inline.hpp"
  46 #include "prims/nativeLookup.hpp"
  47 #include "runtime/deoptimization.hpp"
  48 #include "utilities/bitMap.inline.hpp"
  49 #include "utilities/xmlstream.hpp"
  50 #include "trace/tracing.hpp"
  51 #ifdef COMPILER2
  52 #include "ci/bcEscapeAnalyzer.hpp"
  53 #include "ci/ciTypeFlow.hpp"
  54 #include "oops/method.hpp"
  55 #endif
  56 #ifdef SHARK
  57 #include "ci/ciTypeFlow.hpp"
  58 #include "oops/method.hpp"
  59 #endif
  60 
  61 // ciMethod
  62 //
  63 // This class represents a Method* in the HotSpot virtual
  64 // machine.
  65 
  66 
  67 // ------------------------------------------------------------------
  68 // ciMethod::ciMethod
  69 //
  70 // Loaded method.
  71 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) :
  72   ciMetadata(h_m()),
  73   _holder(holder)
  74 {
  75   assert(h_m() != NULL, "no null method");
  76 
  77   if (LogTouchedMethods) {
  78     h_m()->log_touched(Thread::current());
  79   }
  80   // These fields are always filled in in loaded methods.
  81   _flags = ciFlags(h_m()->access_flags());
  82 
  83   // Easy to compute, so fill them in now.
  84   _max_stack          = h_m()->max_stack();
  85   _max_locals         = h_m()->max_locals();
  86   _code_size          = h_m()->code_size();
  87   _intrinsic_id       = h_m()->intrinsic_id();
  88   _handler_count      = h_m()->exception_table_length();
  89   _size_of_parameters = h_m()->size_of_parameters();
  90   _uses_monitors      = h_m()->access_flags().has_monitor_bytecodes();
  91   _balanced_monitors  = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
  92   _is_c1_compilable   = !h_m()->is_not_c1_compilable();
  93   _is_c2_compilable   = !h_m()->is_not_c2_compilable();
  94   // Lazy fields, filled in on demand.  Require allocation.
  95   _code               = NULL;
  96   _exception_handlers = NULL;
  97   _liveness           = NULL;
  98   _method_blocks = NULL;
  99 #if defined(COMPILER2) || defined(SHARK)
 100   _flow               = NULL;
 101   _bcea               = NULL;
 102 #endif // COMPILER2 || SHARK
 103 
 104   ciEnv *env = CURRENT_ENV;
 105   if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
 106     // 6328518 check hotswap conditions under the right lock.
 107     MutexLocker locker(Compile_lock);
 108     if (Dependencies::check_evol_method(h_m()) != NULL) {
 109       _is_c1_compilable = false;
 110       _is_c2_compilable = false;
 111     }
 112   } else {
 113     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
 114   }
 115 
 116   if (h_m()->method_holder()->is_linked()) {
 117     _can_be_statically_bound = h_m()->can_be_statically_bound();
 118   } else {
 119     // Have to use a conservative value in this case.
 120     _can_be_statically_bound = false;
 121   }
 122 
 123   // Adjust the definition of this condition to be more useful:
 124   // %%% take these conditions into account in vtable generation
 125   if (!_can_be_statically_bound && h_m()->is_private())
 126     _can_be_statically_bound = true;
 127   if (_can_be_statically_bound && h_m()->is_abstract())
 128     _can_be_statically_bound = false;
 129 
 130   // generating _signature may allow GC and therefore move m.
 131   // These fields are always filled in.
 132   _name = env->get_symbol(h_m()->name());
 133   ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
 134   constantPoolHandle cpool = h_m()->constants();
 135   _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
 136   _method_data = NULL;
 137   _nmethod_age = h_m()->nmethod_age();
 138   // Take a snapshot of these values, so they will be commensurate with the MDO.
 139   if (ProfileInterpreter || TieredCompilation) {
 140     int invcnt = h_m()->interpreter_invocation_count();
 141     // if the value overflowed report it as max int
 142     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
 143     _interpreter_throwout_count   = h_m()->interpreter_throwout_count();
 144   } else {
 145     _interpreter_invocation_count = 0;
 146     _interpreter_throwout_count = 0;
 147   }
 148   if (_interpreter_invocation_count == 0)
 149     _interpreter_invocation_count = 1;
 150   _instructions_size = -1;
 151 #ifdef ASSERT
 152   if (ReplayCompiles) {
 153     ciReplay::initialize(this);
 154   }
 155 #endif
 156 }
 157 
 158 
 159 // ------------------------------------------------------------------
 160 // ciMethod::ciMethod
 161 //
 162 // Unloaded method.
 163 ciMethod::ciMethod(ciInstanceKlass* holder,
 164                    ciSymbol*        name,
 165                    ciSymbol*        signature,
 166                    ciInstanceKlass* accessor) :
 167   ciMetadata((Metadata*)NULL),
 168   _name(                   name),
 169   _holder(                 holder),
 170   _intrinsic_id(           vmIntrinsics::_none),
 171   _liveness(               NULL),
 172   _can_be_statically_bound(false),
 173   _method_blocks(          NULL),
 174   _method_data(            NULL)
 175 #if defined(COMPILER2) || defined(SHARK)
 176   ,
 177   _flow(                   NULL),
 178   _bcea(                   NULL),
 179   _instructions_size(-1)
 180 #endif // COMPILER2 || SHARK
 181 {
 182   // Usually holder and accessor are the same type but in some cases
 183   // the holder has the wrong class loader (e.g. invokedynamic call
 184   // sites) so we pass the accessor.
 185   _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
 186 }
 187 
 188 
 189 // ------------------------------------------------------------------
 190 // ciMethod::load_code
 191 //
 192 // Load the bytecodes and exception handler table for this method.
 193 void ciMethod::load_code() {
 194   VM_ENTRY_MARK;
 195   assert(is_loaded(), "only loaded methods have code");
 196 
 197   Method* me = get_Method();
 198   Arena* arena = CURRENT_THREAD_ENV->arena();
 199 
 200   // Load the bytecodes.
 201   _code = (address)arena->Amalloc(code_size());
 202   memcpy(_code, me->code_base(), code_size());
 203 
 204   // Revert any breakpoint bytecodes in ci's copy
 205   if (me->number_of_breakpoints() > 0) {
 206     BreakpointInfo* bp = me->method_holder()->breakpoints();
 207     for (; bp != NULL; bp = bp->next()) {
 208       if (bp->match(me)) {
 209         code_at_put(bp->bci(), bp->orig_bytecode());
 210       }
 211     }
 212   }
 213 
 214   // And load the exception table.
 215   ExceptionTable exc_table(me);
 216 
 217   // Allocate one extra spot in our list of exceptions.  This
 218   // last entry will be used to represent the possibility that
 219   // an exception escapes the method.  See ciExceptionHandlerStream
 220   // for details.
 221   _exception_handlers =
 222     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
 223                                          * (_handler_count + 1));
 224   if (_handler_count > 0) {
 225     for (int i=0; i<_handler_count; i++) {
 226       _exception_handlers[i] = new (arena) ciExceptionHandler(
 227                                 holder(),
 228             /* start    */      exc_table.start_pc(i),
 229             /* limit    */      exc_table.end_pc(i),
 230             /* goto pc  */      exc_table.handler_pc(i),
 231             /* cp index */      exc_table.catch_type_index(i));
 232     }
 233   }
 234 
 235   // Put an entry at the end of our list to represent the possibility
 236   // of exceptional exit.
 237   _exception_handlers[_handler_count] =
 238     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
 239 
 240   if (CIPrintMethodCodes) {
 241     print_codes();
 242   }
 243 }
 244 
 245 
 246 // ------------------------------------------------------------------
 247 // ciMethod::has_linenumber_table
 248 //
 249 // length unknown until decompression
 250 bool    ciMethod::has_linenumber_table() const {
 251   check_is_loaded();
 252   VM_ENTRY_MARK;
 253   return get_Method()->has_linenumber_table();
 254 }
 255 
 256 
 257 // ------------------------------------------------------------------
 258 // ciMethod::compressed_linenumber_table
 259 u_char* ciMethod::compressed_linenumber_table() const {
 260   check_is_loaded();
 261   VM_ENTRY_MARK;
 262   return get_Method()->compressed_linenumber_table();
 263 }
 264 
 265 
 266 // ------------------------------------------------------------------
 267 // ciMethod::line_number_from_bci
 268 int ciMethod::line_number_from_bci(int bci) const {
 269   check_is_loaded();
 270   VM_ENTRY_MARK;
 271   return get_Method()->line_number_from_bci(bci);
 272 }
 273 
 274 
 275 // ------------------------------------------------------------------
 276 // ciMethod::vtable_index
 277 //
 278 // Get the position of this method's entry in the vtable, if any.
 279 int ciMethod::vtable_index() {
 280   check_is_loaded();
 281   assert(holder()->is_linked(), "must be linked");
 282   VM_ENTRY_MARK;
 283   return get_Method()->vtable_index();
 284 }
 285 
 286 
 287 #ifdef SHARK
 288 // ------------------------------------------------------------------
 289 // ciMethod::itable_index
 290 //
 291 // Get the position of this method's entry in the itable, if any.
 292 int ciMethod::itable_index() {
 293   check_is_loaded();
 294   assert(holder()->is_linked(), "must be linked");
 295   VM_ENTRY_MARK;
 296   Method* m = get_Method();
 297   if (!m->has_itable_index())
 298     return Method::nonvirtual_vtable_index;
 299   return m->itable_index();
 300 }
 301 #endif // SHARK
 302 
 303 
 304 // ------------------------------------------------------------------
 305 // ciMethod::native_entry
 306 //
 307 // Get the address of this method's native code, if any.
 308 address ciMethod::native_entry() {
 309   check_is_loaded();
 310   assert(flags().is_native(), "must be native method");
 311   VM_ENTRY_MARK;
 312   Method* method = get_Method();
 313   address entry = method->native_function();
 314   assert(entry != NULL, "must be valid entry point");
 315   return entry;
 316 }
 317 
 318 
 319 // ------------------------------------------------------------------
 320 // ciMethod::interpreter_entry
 321 //
 322 // Get the entry point for running this method in the interpreter.
 323 address ciMethod::interpreter_entry() {
 324   check_is_loaded();
 325   VM_ENTRY_MARK;
 326   methodHandle mh(THREAD, get_Method());
 327   return Interpreter::entry_for_method(mh);
 328 }
 329 
 330 
 331 // ------------------------------------------------------------------
 332 // ciMethod::uses_balanced_monitors
 333 //
 334 // Does this method use monitors in a strict stack-disciplined manner?
 335 bool ciMethod::has_balanced_monitors() {
 336   check_is_loaded();
 337   if (_balanced_monitors) return true;
 338 
 339   // Analyze the method to see if monitors are used properly.
 340   VM_ENTRY_MARK;
 341   methodHandle method(THREAD, get_Method());
 342   assert(method->has_monitor_bytecodes(), "should have checked this");
 343 
 344   // Check to see if a previous compilation computed the
 345   // monitor-matching analysis.
 346   if (method->guaranteed_monitor_matching()) {
 347     _balanced_monitors = true;
 348     return true;
 349   }
 350 
 351   {
 352     EXCEPTION_MARK;
 353     ResourceMark rm(THREAD);
 354     GeneratePairingInfo gpi(method);
 355     gpi.compute_map(CATCH);
 356     if (!gpi.monitor_safe()) {
 357       return false;
 358     }
 359     method->set_guaranteed_monitor_matching();
 360     _balanced_monitors = true;
 361   }
 362   return true;
 363 }
 364 
 365 
 366 // ------------------------------------------------------------------
 367 // ciMethod::get_flow_analysis
 368 ciTypeFlow* ciMethod::get_flow_analysis() {
 369 #if defined(COMPILER2) || defined(SHARK)
 370   if (_flow == NULL) {
 371     ciEnv* env = CURRENT_ENV;
 372     _flow = new (env->arena()) ciTypeFlow(env, this);
 373     _flow->do_flow();
 374   }
 375   return _flow;
 376 #else // COMPILER2 || SHARK
 377   ShouldNotReachHere();
 378   return NULL;
 379 #endif // COMPILER2 || SHARK
 380 }
 381 
 382 
 383 // ------------------------------------------------------------------
 384 // ciMethod::get_osr_flow_analysis
 385 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 386 #if defined(COMPILER2) || defined(SHARK)
 387   // OSR entry points are always place after a call bytecode of some sort
 388   assert(osr_bci >= 0, "must supply valid OSR entry point");
 389   ciEnv* env = CURRENT_ENV;
 390   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 391   flow->do_flow();
 392   return flow;
 393 #else // COMPILER2 || SHARK
 394   ShouldNotReachHere();
 395   return NULL;
 396 #endif // COMPILER2 || SHARK
 397 }
 398 
 399 // ------------------------------------------------------------------
 400 // ciMethod::raw_liveness_at_bci
 401 //
 402 // Which local variables are live at a specific bci?
 403 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 404   check_is_loaded();
 405   if (_liveness == NULL) {
 406     // Create the liveness analyzer.
 407     Arena* arena = CURRENT_ENV->arena();
 408     _liveness = new (arena) MethodLiveness(arena, this);
 409     _liveness->compute_liveness();
 410   }
 411   return _liveness->get_liveness_at(bci);
 412 }
 413 
 414 // ------------------------------------------------------------------
 415 // ciMethod::liveness_at_bci
 416 //
 417 // Which local variables are live at a specific bci?  When debugging
 418 // will return true for all locals in some cases to improve debug
 419 // information.
 420 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 421   MethodLivenessResult result = raw_liveness_at_bci(bci);
 422   if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
 423     // Keep all locals live for the user's edification and amusement.
 424     result.at_put_range(0, result.size(), true);
 425   }
 426   return result;
 427 }
 428 
 429 // ciMethod::live_local_oops_at_bci
 430 //
 431 // find all the live oops in the locals array for a particular bci
 432 // Compute what the interpreter believes by using the interpreter
 433 // oopmap generator. This is used as a double check during osr to
 434 // guard against conservative result from MethodLiveness making us
 435 // think a dead oop is live.  MethodLiveness is conservative in the
 436 // sense that it may consider locals to be live which cannot be live,
 437 // like in the case where a local could contain an oop or  a primitive
 438 // along different paths.  In that case the local must be dead when
 439 // those paths merge. Since the interpreter's viewpoint is used when
 440 // gc'ing an interpreter frame we need to use its viewpoint  during
 441 // OSR when loading the locals.
 442 
 443 BitMap ciMethod::live_local_oops_at_bci(int bci) {
 444   VM_ENTRY_MARK;
 445   InterpreterOopMap mask;
 446   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
 447   int mask_size = max_locals();
 448   BitMap result(mask_size);
 449   result.clear();
 450   int i;
 451   for (i = 0; i < mask_size ; i++ ) {
 452     if (mask.is_oop(i)) result.set_bit(i);
 453   }
 454   return result;
 455 }
 456 
 457 
 458 #ifdef COMPILER1
 459 // ------------------------------------------------------------------
 460 // ciMethod::bci_block_start
 461 //
 462 // Marks all bcis where a new basic block starts
 463 const BitMap ciMethod::bci_block_start() {
 464   check_is_loaded();
 465   if (_liveness == NULL) {
 466     // Create the liveness analyzer.
 467     Arena* arena = CURRENT_ENV->arena();
 468     _liveness = new (arena) MethodLiveness(arena, this);
 469     _liveness->compute_liveness();
 470   }
 471 
 472   return _liveness->get_bci_block_start();
 473 }
 474 #endif // COMPILER1
 475 
 476 
 477 // ------------------------------------------------------------------
 478 // ciMethod::call_profile_at_bci
 479 //
 480 // Get the ciCallProfile for the invocation of this method.
 481 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 482 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 483   ResourceMark rm;
 484   ciCallProfile result;
 485   if (method_data() != NULL && method_data()->is_mature()) {
 486     ciProfileData* data = method_data()->bci_to_data(bci);
 487     if (data != NULL && data->is_CounterData()) {
 488       // Every profiled call site has a counter.
 489       int count = data->as_CounterData()->count();
 490 
 491       if (!data->is_ReceiverTypeData()) {
 492         result._receiver_count[0] = 0;  // that's a definite zero
 493       } else { // ReceiverTypeData is a subclass of CounterData
 494         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 495         // In addition, virtual call sites have receiver type information
 496         int receivers_count_total = 0;
 497         int morphism = 0;
 498         // Precompute morphism for the possible fixup
 499         for (uint i = 0; i < call->row_limit(); i++) {
 500           ciKlass* receiver = call->receiver(i);
 501           if (receiver == NULL)  continue;
 502           morphism++;
 503         }
 504         int epsilon = 0;
 505         if (TieredCompilation && ProfileInterpreter) {
 506           // Interpreter and C1 treat final and special invokes differently.
 507           // C1 will record a type, whereas the interpreter will just
 508           // increment the count. Detect this case.
 509           if (morphism == 1 && count > 0) {
 510             epsilon = count;
 511             count = 0;
 512           }
 513         }
 514         for (uint i = 0; i < call->row_limit(); i++) {
 515           ciKlass* receiver = call->receiver(i);
 516           if (receiver == NULL)  continue;
 517           int rcount = call->receiver_count(i) + epsilon;
 518           if (rcount == 0) rcount = 1; // Should be valid value
 519           receivers_count_total += rcount;
 520           // Add the receiver to result data.
 521           result.add_receiver(receiver, rcount);
 522           // If we extend profiling to record methods,
 523           // we will set result._method also.
 524         }
 525         // Determine call site's morphism.
 526         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
 527         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
 528         // The call site count is > 0 in the case of a polymorphic virtual call.
 529         if (morphism > 0 && morphism == result._limit) {
 530            // The morphism <= MorphismLimit.
 531            if ((morphism <  ciCallProfile::MorphismLimit) ||
 532                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 533 #ifdef ASSERT
 534              if (count > 0) {
 535                this->print_short_name(tty);
 536                tty->print_cr(" @ bci:%d", bci);
 537                this->print_codes();
 538                assert(false, "this call site should not be polymorphic");
 539              }
 540 #endif
 541              result._morphism = morphism;
 542            }
 543         }
 544         // Make the count consistent if this is a call profile. If count is
 545         // zero or less, presume that this is a typecheck profile and
 546         // do nothing.  Otherwise, increase count to be the sum of all
 547         // receiver's counts.
 548         if (count >= 0) {
 549           count += receivers_count_total;
 550         }
 551       }
 552       result._count = count;
 553     }
 554   }
 555   return result;
 556 }
 557 
 558 // ------------------------------------------------------------------
 559 // Add new receiver and sort data by receiver's profile count.
 560 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 561   // Add new receiver and sort data by receiver's counts when we have space
 562   // for it otherwise replace the less called receiver (less called receiver
 563   // is placed to the last array element which is not used).
 564   // First array's element contains most called receiver.
 565   int i = _limit;
 566   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 567     _receiver[i] = _receiver[i-1];
 568     _receiver_count[i] = _receiver_count[i-1];
 569   }
 570   _receiver[i] = receiver;
 571   _receiver_count[i] = receiver_count;
 572   if (_limit < MorphismLimit) _limit++;
 573 }
 574 
 575 
 576 void ciMethod::assert_virtual_call_type_ok(int bci) {
 577   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
 578          java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 579 }
 580 
 581 void ciMethod::assert_call_type_ok(int bci) {
 582   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
 583          java_code_at_bci(bci) == Bytecodes::_invokespecial ||
 584          java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 585 }
 586 
 587 /**
 588  * Check whether profiling provides a type for the argument i to the
 589  * call at bci bci
 590  *
 591  * @param [in]bci         bci of the call
 592  * @param [in]i           argument number
 593  * @param [out]type       profiled type of argument, NULL if none
 594  * @param [out]maybe_null true if null was seen for argument
 595  * @return                true if profiling exists
 596  *
 597  */
 598 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) {
 599   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 600     ciProfileData* data = method_data()->bci_to_data(bci);
 601     if (data != NULL) {
 602       if (data->is_VirtualCallTypeData()) {
 603         assert_virtual_call_type_ok(bci);
 604         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 605         if (i >= call->number_of_arguments()) {
 606           return false;
 607         }
 608         type = call->valid_argument_type(i);
 609         maybe_null = call->argument_maybe_null(i);
 610         return true;
 611       } else if (data->is_CallTypeData()) {
 612         assert_call_type_ok(bci);
 613         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 614         if (i >= call->number_of_arguments()) {
 615           return false;
 616         }
 617         type = call->valid_argument_type(i);
 618         maybe_null = call->argument_maybe_null(i);
 619         return true;
 620       }
 621     }
 622   }
 623   return false;
 624 }
 625 
 626 /**
 627  * Check whether profiling provides a type for the return value from
 628  * the call at bci bci
 629  *
 630  * @param [in]bci         bci of the call
 631  * @param [out]type       profiled type of argument, NULL if none
 632  * @param [out]maybe_null true if null was seen for argument
 633  * @return                true if profiling exists
 634  *
 635  */
 636 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
 637   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
 638     ciProfileData* data = method_data()->bci_to_data(bci);
 639     if (data != NULL) {
 640       if (data->is_VirtualCallTypeData()) {
 641         assert_virtual_call_type_ok(bci);
 642         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 643         type = call->valid_return_type();
 644         maybe_null = call->return_maybe_null();
 645         return true;
 646       } else if (data->is_CallTypeData()) {
 647         assert_call_type_ok(bci);
 648         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 649         type = call->valid_return_type();
 650         maybe_null = call->return_maybe_null();
 651         return true;
 652       }
 653     }
 654   }
 655   return false;
 656 }
 657 
 658 /**
 659  * Check whether profiling provides a type for the parameter i
 660  *
 661  * @param [in]i           parameter number
 662  * @param [out]type       profiled type of parameter, NULL if none
 663  * @param [out]maybe_null true if null was seen for parameter
 664  * @return                true if profiling exists
 665  *
 666  */
 667 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
 668   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 669     ciParametersTypeData* parameters = method_data()->parameters_type_data();
 670     if (parameters != NULL && i < parameters->number_of_parameters()) {
 671       type = parameters->valid_parameter_type(i);
 672       maybe_null = parameters->parameter_maybe_null(i);
 673       return true;
 674     }
 675   }
 676   return false;
 677 }
 678 
 679 
 680 // ------------------------------------------------------------------
 681 // ciMethod::find_monomorphic_target
 682 //
 683 // Given a certain calling environment, find the monomorphic target
 684 // for the call.  Return NULL if the call is not monomorphic in
 685 // its calling environment, or if there are only abstract methods.
 686 // The returned method is never abstract.
 687 // Note: If caller uses a non-null result, it must inform dependencies
 688 // via assert_unique_concrete_method or assert_leaf_type.
 689 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 690                                             ciInstanceKlass* callee_holder,
 691                                             ciInstanceKlass* actual_recv,
 692                                             bool check_access) {
 693   check_is_loaded();
 694 
 695   if (actual_recv->is_interface()) {
 696     // %%% We cannot trust interface types, yet.  See bug 6312651.
 697     return NULL;
 698   }
 699 
 700   ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
 701   if (root_m == NULL) {
 702     // Something went wrong looking up the actual receiver method.
 703     return NULL;
 704   }
 705   assert(!root_m->is_abstract(), "resolve_invoke promise");
 706 
 707   // Make certain quick checks even if UseCHA is false.
 708 
 709   // Is it private or final?
 710   if (root_m->can_be_statically_bound()) {
 711     return root_m;
 712   }
 713 
 714   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
 715     // Easy case.  There is no other place to put a method, so don't bother
 716     // to go through the VM_ENTRY_MARK and all the rest.
 717     return root_m;
 718   }
 719 
 720   // Array methods (clone, hashCode, etc.) are always statically bound.
 721   // If we were to see an array type here, we'd return root_m.
 722   // However, this method processes only ciInstanceKlasses.  (See 4962591.)
 723   // The inline_native_clone intrinsic narrows Object to T[] properly,
 724   // so there is no need to do the same job here.
 725 
 726   if (!UseCHA)  return NULL;
 727 
 728   VM_ENTRY_MARK;
 729 
 730   // Disable CHA for default methods for now
 731   if (root_m->get_Method()->is_default_method()) {
 732     return NULL;
 733   }
 734 
 735   methodHandle target;
 736   {
 737     MutexLocker locker(Compile_lock);
 738     Klass* context = actual_recv->get_Klass();
 739     target = Dependencies::find_unique_concrete_method(context,
 740                                                        root_m->get_Method());
 741     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
 742   }
 743 
 744 #ifndef PRODUCT
 745   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
 746     tty->print("found a non-root unique target method");
 747     tty->print_cr("  context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
 748     tty->print("  method  = ");
 749     target->print_short_name(tty);
 750     tty->cr();
 751   }
 752 #endif //PRODUCT
 753 
 754   if (target() == NULL) {
 755     return NULL;
 756   }
 757   if (target() == root_m->get_Method()) {
 758     return root_m;
 759   }
 760   if (!root_m->is_public() &&
 761       !root_m->is_protected()) {
 762     // If we are going to reason about inheritance, it's easiest
 763     // if the method in question is public, protected, or private.
 764     // If the answer is not root_m, it is conservatively correct
 765     // to return NULL, even if the CHA encountered irrelevant
 766     // methods in other packages.
 767     // %%% TO DO: Work out logic for package-private methods
 768     // with the same name but different vtable indexes.
 769     return NULL;
 770   }
 771   return CURRENT_THREAD_ENV->get_method(target());
 772 }
 773 
 774 // ------------------------------------------------------------------
 775 // ciMethod::resolve_invoke
 776 //
 777 // Given a known receiver klass, find the target for the call.
 778 // Return NULL if the call has no target or the target is abstract.
 779 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
 780    check_is_loaded();
 781    VM_ENTRY_MARK;
 782 
 783    KlassHandle caller_klass (THREAD, caller->get_Klass());
 784    KlassHandle h_recv       (THREAD, exact_receiver->get_Klass());
 785    KlassHandle h_resolved   (THREAD, holder()->get_Klass());
 786    Symbol* h_name      = name()->get_symbol();
 787    Symbol* h_signature = signature()->get_symbol();
 788 
 789    LinkInfo link_info(h_resolved, h_name, h_signature, caller_klass, check_access);
 790    methodHandle m;
 791    // Only do exact lookup if receiver klass has been linked.  Otherwise,
 792    // the vtable has not been setup, and the LinkResolver will fail.
 793    if (h_recv->oop_is_array()
 794         ||
 795        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
 796      if (holder()->is_interface()) {
 797        m = LinkResolver::resolve_interface_call_or_null(h_recv, link_info);
 798      } else {
 799        m = LinkResolver::resolve_virtual_call_or_null(h_recv, link_info);
 800      }
 801    }
 802 
 803    if (m.is_null()) {
 804      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 805      return NULL;
 806    }
 807 
 808    ciMethod* result = this;
 809    if (m() != get_Method()) {
 810      result = CURRENT_THREAD_ENV->get_method(m());
 811    }
 812 
 813    // Don't return abstract methods because they aren't
 814    // optimizable or interesting.
 815    if (result->is_abstract()) {
 816      return NULL;
 817    } else {
 818      return result;
 819    }
 820 }
 821 
 822 // ------------------------------------------------------------------
 823 // ciMethod::resolve_vtable_index
 824 //
 825 // Given a known receiver klass, find the vtable index for the call.
 826 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 827 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 828    check_is_loaded();
 829 
 830    int vtable_index = Method::invalid_vtable_index;
 831    // Only do lookup if receiver klass has been linked.  Otherwise,
 832    // the vtable has not been setup, and the LinkResolver will fail.
 833    if (!receiver->is_interface()
 834        && (!receiver->is_instance_klass() ||
 835            receiver->as_instance_klass()->is_linked())) {
 836      VM_ENTRY_MARK;
 837 
 838      KlassHandle caller_klass (THREAD, caller->get_Klass());
 839      KlassHandle h_recv       (THREAD, receiver->get_Klass());
 840      Symbol* h_name = name()->get_symbol();
 841      Symbol* h_signature = signature()->get_symbol();
 842 
 843      LinkInfo link_info(h_recv, h_name, h_signature, caller_klass);
 844      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, link_info);
 845      if (vtable_index == Method::nonvirtual_vtable_index) {
 846        // A statically bound method.  Return "no such index".
 847        vtable_index = Method::invalid_vtable_index;
 848      }
 849    }
 850 
 851    return vtable_index;
 852 }
 853 
 854 // ------------------------------------------------------------------
 855 // ciMethod::interpreter_call_site_count
 856 int ciMethod::interpreter_call_site_count(int bci) {
 857   if (method_data() != NULL) {
 858     ResourceMark rm;
 859     ciProfileData* data = method_data()->bci_to_data(bci);
 860     if (data != NULL && data->is_CounterData()) {
 861       return scale_count(data->as_CounterData()->count());
 862     }
 863   }
 864   return -1;  // unknown
 865 }
 866 
 867 // ------------------------------------------------------------------
 868 // ciMethod::get_field_at_bci
 869 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 870   ciBytecodeStream iter(this);
 871   iter.reset_to_bci(bci);
 872   iter.next();
 873   return iter.get_field(will_link);
 874 }
 875 
 876 // ------------------------------------------------------------------
 877 // ciMethod::get_method_at_bci
 878 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 879   ciBytecodeStream iter(this);
 880   iter.reset_to_bci(bci);
 881   iter.next();
 882   return iter.get_method(will_link, declared_signature);
 883 }
 884 
 885 // ------------------------------------------------------------------
 886 // Adjust a CounterData count to be commensurate with
 887 // interpreter_invocation_count.  If the MDO exists for
 888 // only 25% of the time the method exists, then the
 889 // counts in the MDO should be scaled by 4X, so that
 890 // they can be usefully and stably compared against the
 891 // invocation counts in methods.
 892 int ciMethod::scale_count(int count, float prof_factor) {
 893   if (count > 0 && method_data() != NULL) {
 894     int counter_life;
 895     int method_life = interpreter_invocation_count();
 896     if (TieredCompilation) {
 897       // In tiered the MDO's life is measured directly, so just use the snapshotted counters
 898       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
 899     } else {
 900       int current_mileage = method_data()->current_mileage();
 901       int creation_mileage = method_data()->creation_mileage();
 902       counter_life = current_mileage - creation_mileage;
 903     }
 904 
 905     // counter_life due to backedge_counter could be > method_life
 906     if (counter_life > method_life)
 907       counter_life = method_life;
 908     if (0 < counter_life && counter_life <= method_life) {
 909       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 910       count = (count > 0) ? count : 1;
 911     }
 912   }
 913   return count;
 914 }
 915 
 916 
 917 // ------------------------------------------------------------------
 918 // ciMethod::is_special_get_caller_class_method
 919 //
 920 bool ciMethod::is_ignored_by_security_stack_walk() const {
 921   check_is_loaded();
 922   VM_ENTRY_MARK;
 923   return get_Method()->is_ignored_by_security_stack_walk();
 924 }
 925 
 926 
 927 // ------------------------------------------------------------------
 928 // invokedynamic support
 929 
 930 // ------------------------------------------------------------------
 931 // ciMethod::is_method_handle_intrinsic
 932 //
 933 // Return true if the method is an instance of the JVM-generated
 934 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 935 bool ciMethod::is_method_handle_intrinsic() const {
 936   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 937   return (MethodHandles::is_signature_polymorphic(iid) &&
 938           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 939 }
 940 
 941 // ------------------------------------------------------------------
 942 // ciMethod::is_compiled_lambda_form
 943 //
 944 // Return true if the method is a generated MethodHandle adapter.
 945 // These are built by Java code.
 946 bool ciMethod::is_compiled_lambda_form() const {
 947   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 948   return iid == vmIntrinsics::_compiledLambdaForm;
 949 }
 950 
 951 // ------------------------------------------------------------------
 952 // ciMethod::has_member_arg
 953 //
 954 // Return true if the method is a linker intrinsic like _linkToVirtual.
 955 // These are built by the JVM.
 956 bool ciMethod::has_member_arg() const {
 957   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 958   return (MethodHandles::is_signature_polymorphic(iid) &&
 959           MethodHandles::has_member_arg(iid));
 960 }
 961 
 962 // ------------------------------------------------------------------
 963 // ciMethod::ensure_method_data
 964 //
 965 // Generate new MethodData* objects at compile time.
 966 // Return true if allocation was successful or no MDO is required.
 967 bool ciMethod::ensure_method_data(methodHandle h_m) {
 968   EXCEPTION_CONTEXT;
 969   if (is_native() || is_abstract() || h_m()->is_accessor()) {
 970     return true;
 971   }
 972   if (h_m()->method_data() == NULL) {
 973     Method::build_interpreter_method_data(h_m, THREAD);
 974     if (HAS_PENDING_EXCEPTION) {
 975       CLEAR_PENDING_EXCEPTION;
 976     }
 977   }
 978   if (h_m()->method_data() != NULL) {
 979     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 980     _method_data->load_data();
 981     return true;
 982   } else {
 983     _method_data = CURRENT_ENV->get_empty_methodData();
 984     return false;
 985   }
 986 }
 987 
 988 // public, retroactive version
 989 bool ciMethod::ensure_method_data() {
 990   bool result = true;
 991   if (_method_data == NULL || _method_data->is_empty()) {
 992     GUARDED_VM_ENTRY({
 993       result = ensure_method_data(get_Method());
 994     });
 995   }
 996   return result;
 997 }
 998 
 999 
1000 // ------------------------------------------------------------------
1001 // ciMethod::method_data
1002 //
1003 ciMethodData* ciMethod::method_data() {
1004   if (_method_data != NULL) {
1005     return _method_data;
1006   }
1007   VM_ENTRY_MARK;
1008   ciEnv* env = CURRENT_ENV;
1009   Thread* my_thread = JavaThread::current();
1010   methodHandle h_m(my_thread, get_Method());
1011 
1012   if (h_m()->method_data() != NULL) {
1013     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1014     _method_data->load_data();
1015   } else {
1016     _method_data = CURRENT_ENV->get_empty_methodData();
1017   }
1018   return _method_data;
1019 
1020 }
1021 
1022 // ------------------------------------------------------------------
1023 // ciMethod::method_data_or_null
1024 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1025 // NULL otherwise.
1026 ciMethodData* ciMethod::method_data_or_null() {
1027   ciMethodData *md = method_data();
1028   if (md->is_empty()) {
1029     return NULL;
1030   }
1031   return md;
1032 }
1033 
1034 // ------------------------------------------------------------------
1035 // ciMethod::ensure_method_counters
1036 //
1037 MethodCounters* ciMethod::ensure_method_counters() {
1038   check_is_loaded();
1039   VM_ENTRY_MARK;
1040   methodHandle mh(THREAD, get_Method());
1041   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1042   return method_counters;
1043 }
1044 
1045 // ------------------------------------------------------------------
1046 // ciMethod::has_option
1047 //
1048 bool ciMethod::has_option(const char* option) {
1049   check_is_loaded();
1050   VM_ENTRY_MARK;
1051   methodHandle mh(THREAD, get_Method());
1052   return CompilerOracle::has_option_string(mh, option);
1053 }
1054 
1055 // ------------------------------------------------------------------
1056 // ciMethod::has_option_value
1057 //
1058 bool ciMethod::has_option_value(const char* option, double& value) {
1059   check_is_loaded();
1060   VM_ENTRY_MARK;
1061   methodHandle mh(THREAD, get_Method());
1062   return CompilerOracle::has_option_value(mh, option, value);
1063 }
1064 // ------------------------------------------------------------------
1065 // ciMethod::can_be_compiled
1066 //
1067 // Have previous compilations of this method succeeded?
1068 bool ciMethod::can_be_compiled() {
1069   check_is_loaded();
1070   ciEnv* env = CURRENT_ENV;
1071   if (is_c1_compile(env->comp_level())) {
1072     return _is_c1_compilable;
1073   }
1074   return _is_c2_compilable;
1075 }
1076 
1077 // ------------------------------------------------------------------
1078 // ciMethod::set_not_compilable
1079 //
1080 // Tell the VM that this method cannot be compiled at all.
1081 void ciMethod::set_not_compilable(const char* reason) {
1082   check_is_loaded();
1083   VM_ENTRY_MARK;
1084   ciEnv* env = CURRENT_ENV;
1085   if (is_c1_compile(env->comp_level())) {
1086     _is_c1_compilable = false;
1087   } else {
1088     _is_c2_compilable = false;
1089   }
1090   get_Method()->set_not_compilable(env->comp_level(), true, reason);
1091 }
1092 
1093 // ------------------------------------------------------------------
1094 // ciMethod::can_be_osr_compiled
1095 //
1096 // Have previous compilations of this method succeeded?
1097 //
1098 // Implementation note: the VM does not currently keep track
1099 // of failed OSR compilations per bci.  The entry_bci parameter
1100 // is currently unused.
1101 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1102   check_is_loaded();
1103   VM_ENTRY_MARK;
1104   ciEnv* env = CURRENT_ENV;
1105   return !get_Method()->is_not_osr_compilable(env->comp_level());
1106 }
1107 
1108 // ------------------------------------------------------------------
1109 // ciMethod::has_compiled_code
1110 bool ciMethod::has_compiled_code() {
1111   return instructions_size() > 0;
1112 }
1113 
1114 int ciMethod::comp_level() {
1115   check_is_loaded();
1116   VM_ENTRY_MARK;
1117   nmethod* nm = get_Method()->code();
1118   if (nm != NULL) return nm->comp_level();
1119   return 0;
1120 }
1121 
1122 int ciMethod::highest_osr_comp_level() {
1123   check_is_loaded();
1124   VM_ENTRY_MARK;
1125   return get_Method()->highest_osr_comp_level();
1126 }
1127 
1128 // ------------------------------------------------------------------
1129 // ciMethod::code_size_for_inlining
1130 //
1131 // Code size for inlining decisions.  This method returns a code
1132 // size of 1 for methods which has the ForceInline annotation.
1133 int ciMethod::code_size_for_inlining() {
1134   check_is_loaded();
1135   if (get_Method()->force_inline()) {
1136     return 1;
1137   }
1138   return code_size();
1139 }
1140 
1141 // ------------------------------------------------------------------
1142 // ciMethod::instructions_size
1143 //
1144 // This is a rough metric for "fat" methods, compared before inlining
1145 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1146 // junk like exception handler, stubs, and constant table, which are
1147 // not highly relevant to an inlined method.  So we use the more
1148 // specific accessor nmethod::insts_size.
1149 int ciMethod::instructions_size() {
1150   if (_instructions_size == -1) {
1151     GUARDED_VM_ENTRY(
1152                      nmethod* code = get_Method()->code();
1153                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1154                        _instructions_size = code->insts_end() - code->verified_entry_point();
1155                      } else {
1156                        _instructions_size = 0;
1157                      }
1158                      );
1159   }
1160   return _instructions_size;
1161 }
1162 
1163 // ------------------------------------------------------------------
1164 // ciMethod::log_nmethod_identity
1165 void ciMethod::log_nmethod_identity(xmlStream* log) {
1166   GUARDED_VM_ENTRY(
1167     nmethod* code = get_Method()->code();
1168     if (code != NULL) {
1169       code->log_identity(log);
1170     }
1171   )
1172 }
1173 
1174 // ------------------------------------------------------------------
1175 // ciMethod::is_not_reached
1176 bool ciMethod::is_not_reached(int bci) {
1177   check_is_loaded();
1178   VM_ENTRY_MARK;
1179   return Interpreter::is_not_reached(
1180                methodHandle(THREAD, get_Method()), bci);
1181 }
1182 
1183 // ------------------------------------------------------------------
1184 // ciMethod::was_never_executed
1185 bool ciMethod::was_executed_more_than(int times) {
1186   VM_ENTRY_MARK;
1187   return get_Method()->was_executed_more_than(times);
1188 }
1189 
1190 // ------------------------------------------------------------------
1191 // ciMethod::has_unloaded_classes_in_signature
1192 bool ciMethod::has_unloaded_classes_in_signature() {
1193   VM_ENTRY_MARK;
1194   {
1195     EXCEPTION_MARK;
1196     methodHandle m(THREAD, get_Method());
1197     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1198     if( HAS_PENDING_EXCEPTION ) {
1199       CLEAR_PENDING_EXCEPTION;
1200       return true;     // Declare that we may have unloaded classes
1201     }
1202     return has_unloaded;
1203   }
1204 }
1205 
1206 // ------------------------------------------------------------------
1207 // ciMethod::is_klass_loaded
1208 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1209   VM_ENTRY_MARK;
1210   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1211 }
1212 
1213 // ------------------------------------------------------------------
1214 // ciMethod::check_call
1215 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1216   // This method is used only in C2 from InlineTree::ok_to_inline,
1217   // and is only used under -Xcomp or -XX:CompileTheWorld.
1218   // It appears to fail when applied to an invokeinterface call site.
1219   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1220   VM_ENTRY_MARK;
1221   {
1222     EXCEPTION_MARK;
1223     HandleMark hm(THREAD);
1224     constantPoolHandle pool (THREAD, get_Method()->constants());
1225     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1226     methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1227     if (HAS_PENDING_EXCEPTION) {
1228       CLEAR_PENDING_EXCEPTION;
1229       return false;
1230     } else {
1231       return (spec_method->is_static() == is_static);
1232     }
1233   }
1234   return false;
1235 }
1236 
1237 // ------------------------------------------------------------------
1238 // ciMethod::profile_aging
1239 //
1240 // Should the method be compiled with an age counter?
1241 bool ciMethod::profile_aging() const {
1242   return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1243                           !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1244 }
1245 // ------------------------------------------------------------------
1246 // ciMethod::print_codes
1247 //
1248 // Print the bytecodes for this method.
1249 void ciMethod::print_codes_on(outputStream* st) {
1250   check_is_loaded();
1251   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1252 }
1253 
1254 
1255 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1256   check_is_loaded(); \
1257   VM_ENTRY_MARK; \
1258   return get_Method()->flag_accessor(); \
1259 }
1260 
1261 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1262 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1263 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1264 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1265 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1266 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }
1267 
1268 bool ciMethod::is_boxing_method() const {
1269   if (holder()->is_box_klass()) {
1270     switch (intrinsic_id()) {
1271       case vmIntrinsics::_Boolean_valueOf:
1272       case vmIntrinsics::_Byte_valueOf:
1273       case vmIntrinsics::_Character_valueOf:
1274       case vmIntrinsics::_Short_valueOf:
1275       case vmIntrinsics::_Integer_valueOf:
1276       case vmIntrinsics::_Long_valueOf:
1277       case vmIntrinsics::_Float_valueOf:
1278       case vmIntrinsics::_Double_valueOf:
1279         return true;
1280       default:
1281         return false;
1282     }
1283   }
1284   return false;
1285 }
1286 
1287 bool ciMethod::is_unboxing_method() const {
1288   if (holder()->is_box_klass()) {
1289     switch (intrinsic_id()) {
1290       case vmIntrinsics::_booleanValue:
1291       case vmIntrinsics::_byteValue:
1292       case vmIntrinsics::_charValue:
1293       case vmIntrinsics::_shortValue:
1294       case vmIntrinsics::_intValue:
1295       case vmIntrinsics::_longValue:
1296       case vmIntrinsics::_floatValue:
1297       case vmIntrinsics::_doubleValue:
1298         return true;
1299       default:
1300         return false;
1301     }
1302   }
1303   return false;
1304 }
1305 
1306 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1307 #ifdef COMPILER2
1308   if (_bcea == NULL) {
1309     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1310   }
1311   return _bcea;
1312 #else // COMPILER2
1313   ShouldNotReachHere();
1314   return NULL;
1315 #endif // COMPILER2
1316 }
1317 
1318 ciMethodBlocks  *ciMethod::get_method_blocks() {
1319   Arena *arena = CURRENT_ENV->arena();
1320   if (_method_blocks == NULL) {
1321     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1322   }
1323   return _method_blocks;
1324 }
1325 
1326 #undef FETCH_FLAG_FROM_VM
1327 
1328 void ciMethod::dump_name_as_ascii(outputStream* st) {
1329   Method* method = get_Method();
1330   st->print("%s %s %s",
1331             method->klass_name()->as_quoted_ascii(),
1332             method->name()->as_quoted_ascii(),
1333             method->signature()->as_quoted_ascii());
1334 }
1335 
1336 void ciMethod::dump_replay_data(outputStream* st) {
1337   ResourceMark rm;
1338   Method* method = get_Method();
1339   MethodCounters* mcs = method->method_counters();
1340   st->print("ciMethod ");
1341   dump_name_as_ascii(st);
1342   st->print_cr(" %d %d %d %d %d",
1343                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1344                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1345                interpreter_invocation_count(),
1346                interpreter_throwout_count(),
1347                _instructions_size);
1348 }
1349 
1350 // ------------------------------------------------------------------
1351 // ciMethod::print_codes
1352 //
1353 // Print a range of the bytecodes for this method.
1354 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1355   check_is_loaded();
1356   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1357 }
1358 
1359 // ------------------------------------------------------------------
1360 // ciMethod::print_name
1361 //
1362 // Print the name of this method, including signature and some flags.
1363 void ciMethod::print_name(outputStream* st) {
1364   check_is_loaded();
1365   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1366 }
1367 
1368 // ------------------------------------------------------------------
1369 // ciMethod::print_short_name
1370 //
1371 // Print the name of this method, without signature.
1372 void ciMethod::print_short_name(outputStream* st) {
1373   if (is_loaded()) {
1374     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1375   } else {
1376     // Fall back if method is not loaded.
1377     holder()->print_name_on(st);
1378     st->print("::");
1379     name()->print_symbol_on(st);
1380     if (WizardMode)
1381       signature()->as_symbol()->print_symbol_on(st);
1382   }
1383 }
1384 
1385 // ------------------------------------------------------------------
1386 // ciMethod::print_impl
1387 //
1388 // Implementation of the print method.
1389 void ciMethod::print_impl(outputStream* st) {
1390   ciMetadata::print_impl(st);
1391   st->print(" name=");
1392   name()->print_symbol_on(st);
1393   st->print(" holder=");
1394   holder()->print_name_on(st);
1395   st->print(" signature=");
1396   signature()->as_symbol()->print_symbol_on(st);
1397   if (is_loaded()) {
1398     st->print(" loaded=true");
1399     st->print(" arg_size=%d", arg_size());
1400     st->print(" flags=");
1401     flags().print_member_flags(st);
1402   } else {
1403     st->print(" loaded=false");
1404   }
1405 }
1406 
1407 #if INCLUDE_TRACE
1408 TraceStructCiMethod ciMethod::to_trace_struct() const {
1409   TraceStructCiMethod result;
1410   result.set_class(holder()->name()->as_utf8());
1411   result.set_name(name()->as_utf8());
1412   result.set_signature(signature()->as_symbol()->as_utf8());
1413   return result;
1414 }
1415 #endif