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/compilerOracle.hpp"
  39 #include "compiler/methodLiveness.hpp"
  40 #include "interpreter/interpreter.hpp"
  41 #include "interpreter/linkResolver.hpp"
  42 #include "interpreter/oopMapCache.hpp"
  43 #include "memory/allocation.inline.hpp"
  44 #include "memory/resourceArea.hpp"
  45 #include "oops/generateOopMap.hpp"
  46 #include "oops/oop.inline.hpp"
  47 #include "prims/nativeLookup.hpp"
  48 #include "runtime/deoptimization.hpp"
  49 #include "utilities/bitMap.inline.hpp"
  50 #include "utilities/xmlstream.hpp"
  51 #include "trace/tracing.hpp"
  52 #ifdef COMPILER2
  53 #include "ci/bcEscapeAnalyzer.hpp"
  54 #include "ci/ciTypeFlow.hpp"
  55 #include "oops/method.hpp"
  56 #endif
  57 #ifdef SHARK
  58 #include "ci/ciTypeFlow.hpp"
  59 #include "oops/method.hpp"
  60 #endif
  61 
  62 // ciMethod
  63 //
  64 // This class represents a Method* in the HotSpot virtual
  65 // machine.
  66 
  67 
  68 // ------------------------------------------------------------------
  69 // ciMethod::ciMethod
  70 //
  71 // Loaded method.
  72 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) :
  73   ciMetadata(h_m()),
  74   _holder(holder)
  75 {
  76   assert(h_m() != NULL, "no null method");
  77 
  78   if (LogTouchedMethods) {
  79     h_m()->log_touched(Thread::current());
  80   }
  81   // These fields are always filled in in loaded methods.
  82   _flags = ciFlags(h_m()->access_flags());
  83 
  84   // Easy to compute, so fill them in now.
  85   _max_stack          = h_m()->max_stack();
  86   _max_locals         = h_m()->max_locals();
  87   _code_size          = h_m()->code_size();
  88   _intrinsic_id       = h_m()->intrinsic_id();
  89   _handler_count      = h_m()->exception_table_length();
  90   _size_of_parameters = h_m()->size_of_parameters();
  91   _uses_monitors      = h_m()->access_flags().has_monitor_bytecodes();
  92   _balanced_monitors  = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
  93   _is_c1_compilable   = !h_m()->is_not_c1_compilable();
  94   _is_c2_compilable   = !h_m()->is_not_c2_compilable();
  95   _has_reserved_stack_access   = h_m()->has_reserved_stack_access();
  96   // Lazy fields, filled in on demand.  Require allocation.
  97   _code               = NULL;
  98   _exception_handlers = NULL;
  99   _liveness           = NULL;
 100   _method_blocks = NULL;
 101 #if defined(COMPILER2) || defined(SHARK)
 102   _flow               = NULL;
 103   _bcea               = NULL;
 104 #endif // COMPILER2 || SHARK
 105 
 106   ciEnv *env = CURRENT_ENV;
 107   if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
 108     // 6328518 check hotswap conditions under the right lock.
 109     MutexLocker locker(Compile_lock);
 110     if (Dependencies::check_evol_method(h_m()) != NULL) {
 111       _is_c1_compilable = false;
 112       _is_c2_compilable = false;
 113     }
 114   } else {
 115     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
 116   }
 117 
 118   if (h_m()->method_holder()->is_linked()) {
 119     _can_be_statically_bound = h_m()->can_be_statically_bound();
 120   } else {
 121     // Have to use a conservative value in this case.
 122     _can_be_statically_bound = false;
 123   }
 124 
 125   // Adjust the definition of this condition to be more useful:
 126   // %%% take these conditions into account in vtable generation
 127   if (!_can_be_statically_bound && h_m()->is_private())
 128     _can_be_statically_bound = true;
 129   if (_can_be_statically_bound && h_m()->is_abstract())
 130     _can_be_statically_bound = false;
 131 
 132   // generating _signature may allow GC and therefore move m.
 133   // These fields are always filled in.
 134   _name = env->get_symbol(h_m()->name());
 135   ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
 136   constantPoolHandle cpool = h_m()->constants();
 137   _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
 138   _method_data = NULL;
 139   _nmethod_age = h_m()->nmethod_age();
 140   // Take a snapshot of these values, so they will be commensurate with the MDO.
 141   if (ProfileInterpreter || TieredCompilation) {
 142     int invcnt = h_m()->interpreter_invocation_count();
 143     // if the value overflowed report it as max int
 144     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
 145     _interpreter_throwout_count   = h_m()->interpreter_throwout_count();
 146   } else {
 147     _interpreter_invocation_count = 0;
 148     _interpreter_throwout_count = 0;
 149   }
 150   if (_interpreter_invocation_count == 0)
 151     _interpreter_invocation_count = 1;
 152   _instructions_size = -1;
 153 #ifdef ASSERT
 154   if (ReplayCompiles) {
 155     ciReplay::initialize(this);
 156   }
 157 #endif
 158 }
 159 
 160 
 161 // ------------------------------------------------------------------
 162 // ciMethod::ciMethod
 163 //
 164 // Unloaded method.
 165 ciMethod::ciMethod(ciInstanceKlass* holder,
 166                    ciSymbol*        name,
 167                    ciSymbol*        signature,
 168                    ciInstanceKlass* accessor) :
 169   ciMetadata((Metadata*)NULL),
 170   _name(                   name),
 171   _holder(                 holder),
 172   _intrinsic_id(           vmIntrinsics::_none),
 173   _liveness(               NULL),
 174   _can_be_statically_bound(false),
 175   _method_blocks(          NULL),
 176   _method_data(            NULL)
 177 #if defined(COMPILER2) || defined(SHARK)
 178   ,
 179   _flow(                   NULL),
 180   _bcea(                   NULL),
 181   _instructions_size(-1)
 182 #endif // COMPILER2 || SHARK
 183 {
 184   // Usually holder and accessor are the same type but in some cases
 185   // the holder has the wrong class loader (e.g. invokedynamic call
 186   // sites) so we pass the accessor.
 187   _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
 188 }
 189 
 190 
 191 // ------------------------------------------------------------------
 192 // ciMethod::load_code
 193 //
 194 // Load the bytecodes and exception handler table for this method.
 195 void ciMethod::load_code() {
 196   VM_ENTRY_MARK;
 197   assert(is_loaded(), "only loaded methods have code");
 198 
 199   Method* me = get_Method();
 200   Arena* arena = CURRENT_THREAD_ENV->arena();
 201 
 202   // Load the bytecodes.
 203   _code = (address)arena->Amalloc(code_size());
 204   memcpy(_code, me->code_base(), code_size());
 205 
 206   // Revert any breakpoint bytecodes in ci's copy
 207   if (me->number_of_breakpoints() > 0) {
 208     BreakpointInfo* bp = me->method_holder()->breakpoints();
 209     for (; bp != NULL; bp = bp->next()) {
 210       if (bp->match(me)) {
 211         code_at_put(bp->bci(), bp->orig_bytecode());
 212       }
 213     }
 214   }
 215 
 216   // And load the exception table.
 217   ExceptionTable exc_table(me);
 218 
 219   // Allocate one extra spot in our list of exceptions.  This
 220   // last entry will be used to represent the possibility that
 221   // an exception escapes the method.  See ciExceptionHandlerStream
 222   // for details.
 223   _exception_handlers =
 224     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
 225                                          * (_handler_count + 1));
 226   if (_handler_count > 0) {
 227     for (int i=0; i<_handler_count; i++) {
 228       _exception_handlers[i] = new (arena) ciExceptionHandler(
 229                                 holder(),
 230             /* start    */      exc_table.start_pc(i),
 231             /* limit    */      exc_table.end_pc(i),
 232             /* goto pc  */      exc_table.handler_pc(i),
 233             /* cp index */      exc_table.catch_type_index(i));
 234     }
 235   }
 236 
 237   // Put an entry at the end of our list to represent the possibility
 238   // of exceptional exit.
 239   _exception_handlers[_handler_count] =
 240     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
 241 
 242   if (CIPrintMethodCodes) {
 243     print_codes();
 244   }
 245 }
 246 
 247 
 248 // ------------------------------------------------------------------
 249 // ciMethod::has_linenumber_table
 250 //
 251 // length unknown until decompression
 252 bool    ciMethod::has_linenumber_table() const {
 253   check_is_loaded();
 254   VM_ENTRY_MARK;
 255   return get_Method()->has_linenumber_table();
 256 }
 257 
 258 
 259 // ------------------------------------------------------------------
 260 // ciMethod::compressed_linenumber_table
 261 u_char* ciMethod::compressed_linenumber_table() const {
 262   check_is_loaded();
 263   VM_ENTRY_MARK;
 264   return get_Method()->compressed_linenumber_table();
 265 }
 266 
 267 
 268 // ------------------------------------------------------------------
 269 // ciMethod::line_number_from_bci
 270 int ciMethod::line_number_from_bci(int bci) const {
 271   check_is_loaded();
 272   VM_ENTRY_MARK;
 273   return get_Method()->line_number_from_bci(bci);
 274 }
 275 
 276 
 277 // ------------------------------------------------------------------
 278 // ciMethod::vtable_index
 279 //
 280 // Get the position of this method's entry in the vtable, if any.
 281 int ciMethod::vtable_index() {
 282   check_is_loaded();
 283   assert(holder()->is_linked(), "must be linked");
 284   VM_ENTRY_MARK;
 285   return get_Method()->vtable_index();
 286 }
 287 
 288 
 289 #ifdef SHARK
 290 // ------------------------------------------------------------------
 291 // ciMethod::itable_index
 292 //
 293 // Get the position of this method's entry in the itable, if any.
 294 int ciMethod::itable_index() {
 295   check_is_loaded();
 296   assert(holder()->is_linked(), "must be linked");
 297   VM_ENTRY_MARK;
 298   Method* m = get_Method();
 299   if (!m->has_itable_index())
 300     return Method::nonvirtual_vtable_index;
 301   return m->itable_index();
 302 }
 303 #endif // SHARK
 304 
 305 
 306 // ------------------------------------------------------------------
 307 // ciMethod::native_entry
 308 //
 309 // Get the address of this method's native code, if any.
 310 address ciMethod::native_entry() {
 311   check_is_loaded();
 312   assert(flags().is_native(), "must be native method");
 313   VM_ENTRY_MARK;
 314   Method* method = get_Method();
 315   address entry = method->native_function();
 316   assert(entry != NULL, "must be valid entry point");
 317   return entry;
 318 }
 319 
 320 
 321 // ------------------------------------------------------------------
 322 // ciMethod::interpreter_entry
 323 //
 324 // Get the entry point for running this method in the interpreter.
 325 address ciMethod::interpreter_entry() {
 326   check_is_loaded();
 327   VM_ENTRY_MARK;
 328   methodHandle mh(THREAD, get_Method());
 329   return Interpreter::entry_for_method(mh);
 330 }
 331 
 332 
 333 // ------------------------------------------------------------------
 334 // ciMethod::uses_balanced_monitors
 335 //
 336 // Does this method use monitors in a strict stack-disciplined manner?
 337 bool ciMethod::has_balanced_monitors() {
 338   check_is_loaded();
 339   if (_balanced_monitors) return true;
 340 
 341   // Analyze the method to see if monitors are used properly.
 342   VM_ENTRY_MARK;
 343   methodHandle method(THREAD, get_Method());
 344   assert(method->has_monitor_bytecodes(), "should have checked this");
 345 
 346   // Check to see if a previous compilation computed the
 347   // monitor-matching analysis.
 348   if (method->guaranteed_monitor_matching()) {
 349     _balanced_monitors = true;
 350     return true;
 351   }
 352 
 353   {
 354     EXCEPTION_MARK;
 355     ResourceMark rm(THREAD);
 356     GeneratePairingInfo gpi(method);
 357     gpi.compute_map(CATCH);
 358     if (!gpi.monitor_safe()) {
 359       return false;
 360     }
 361     method->set_guaranteed_monitor_matching();
 362     _balanced_monitors = true;
 363   }
 364   return true;
 365 }
 366 
 367 
 368 // ------------------------------------------------------------------
 369 // ciMethod::get_flow_analysis
 370 ciTypeFlow* ciMethod::get_flow_analysis() {
 371 #if defined(COMPILER2) || defined(SHARK)
 372   if (_flow == NULL) {
 373     ciEnv* env = CURRENT_ENV;
 374     _flow = new (env->arena()) ciTypeFlow(env, this);
 375     _flow->do_flow();
 376   }
 377   return _flow;
 378 #else // COMPILER2 || SHARK
 379   ShouldNotReachHere();
 380   return NULL;
 381 #endif // COMPILER2 || SHARK
 382 }
 383 
 384 
 385 // ------------------------------------------------------------------
 386 // ciMethod::get_osr_flow_analysis
 387 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 388 #if defined(COMPILER2) || defined(SHARK)
 389   // OSR entry points are always place after a call bytecode of some sort
 390   assert(osr_bci >= 0, "must supply valid OSR entry point");
 391   ciEnv* env = CURRENT_ENV;
 392   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 393   flow->do_flow();
 394   return flow;
 395 #else // COMPILER2 || SHARK
 396   ShouldNotReachHere();
 397   return NULL;
 398 #endif // COMPILER2 || SHARK
 399 }
 400 
 401 // ------------------------------------------------------------------
 402 // ciMethod::raw_liveness_at_bci
 403 //
 404 // Which local variables are live at a specific bci?
 405 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 406   check_is_loaded();
 407   if (_liveness == NULL) {
 408     // Create the liveness analyzer.
 409     Arena* arena = CURRENT_ENV->arena();
 410     _liveness = new (arena) MethodLiveness(arena, this);
 411     _liveness->compute_liveness();
 412   }
 413   return _liveness->get_liveness_at(bci);
 414 }
 415 
 416 // ------------------------------------------------------------------
 417 // ciMethod::liveness_at_bci
 418 //
 419 // Which local variables are live at a specific bci?  When debugging
 420 // will return true for all locals in some cases to improve debug
 421 // information.
 422 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 423   MethodLivenessResult result = raw_liveness_at_bci(bci);
 424   if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
 425     // Keep all locals live for the user's edification and amusement.
 426     result.at_put_range(0, result.size(), true);
 427   }
 428   return result;
 429 }
 430 
 431 // ciMethod::live_local_oops_at_bci
 432 //
 433 // find all the live oops in the locals array for a particular bci
 434 // Compute what the interpreter believes by using the interpreter
 435 // oopmap generator. This is used as a double check during osr to
 436 // guard against conservative result from MethodLiveness making us
 437 // think a dead oop is live.  MethodLiveness is conservative in the
 438 // sense that it may consider locals to be live which cannot be live,
 439 // like in the case where a local could contain an oop or  a primitive
 440 // along different paths.  In that case the local must be dead when
 441 // those paths merge. Since the interpreter's viewpoint is used when
 442 // gc'ing an interpreter frame we need to use its viewpoint  during
 443 // OSR when loading the locals.
 444 
 445 BitMap ciMethod::live_local_oops_at_bci(int bci) {
 446   VM_ENTRY_MARK;
 447   InterpreterOopMap mask;
 448   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
 449   int mask_size = max_locals();
 450   BitMap result(mask_size);
 451   result.clear();
 452   int i;
 453   for (i = 0; i < mask_size ; i++ ) {
 454     if (mask.is_oop(i)) result.set_bit(i);
 455   }
 456   return result;
 457 }
 458 
 459 
 460 #ifdef COMPILER1
 461 // ------------------------------------------------------------------
 462 // ciMethod::bci_block_start
 463 //
 464 // Marks all bcis where a new basic block starts
 465 const BitMap ciMethod::bci_block_start() {
 466   check_is_loaded();
 467   if (_liveness == NULL) {
 468     // Create the liveness analyzer.
 469     Arena* arena = CURRENT_ENV->arena();
 470     _liveness = new (arena) MethodLiveness(arena, this);
 471     _liveness->compute_liveness();
 472   }
 473 
 474   return _liveness->get_bci_block_start();
 475 }
 476 #endif // COMPILER1
 477 
 478 
 479 // ------------------------------------------------------------------
 480 // ciMethod::call_profile_at_bci
 481 //
 482 // Get the ciCallProfile for the invocation of this method.
 483 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 484 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 485   ResourceMark rm;
 486   ciCallProfile result;
 487   if (method_data() != NULL && method_data()->is_mature()) {
 488     ciProfileData* data = method_data()->bci_to_data(bci);
 489     if (data != NULL && data->is_CounterData()) {
 490       // Every profiled call site has a counter.
 491       int count = data->as_CounterData()->count();
 492 
 493       if (!data->is_ReceiverTypeData()) {
 494         result._receiver_count[0] = 0;  // that's a definite zero
 495       } else { // ReceiverTypeData is a subclass of CounterData
 496         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 497         // In addition, virtual call sites have receiver type information
 498         int receivers_count_total = 0;
 499         int morphism = 0;
 500         // Precompute morphism for the possible fixup
 501         for (uint i = 0; i < call->row_limit(); i++) {
 502           ciKlass* receiver = call->receiver(i);
 503           if (receiver == NULL)  continue;
 504           morphism++;
 505         }
 506         int epsilon = 0;
 507         if (TieredCompilation && ProfileInterpreter) {
 508           // Interpreter and C1 treat final and special invokes differently.
 509           // C1 will record a type, whereas the interpreter will just
 510           // increment the count. Detect this case.
 511           if (morphism == 1 && count > 0) {
 512             epsilon = count;
 513             count = 0;
 514           }
 515         }
 516         for (uint i = 0; i < call->row_limit(); i++) {
 517           ciKlass* receiver = call->receiver(i);
 518           if (receiver == NULL)  continue;
 519           int rcount = call->receiver_count(i) + epsilon;
 520           if (rcount == 0) rcount = 1; // Should be valid value
 521           receivers_count_total += rcount;
 522           // Add the receiver to result data.
 523           result.add_receiver(receiver, rcount);
 524           // If we extend profiling to record methods,
 525           // we will set result._method also.
 526         }
 527         // Determine call site's morphism.
 528         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
 529         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
 530         // The call site count is > 0 in the case of a polymorphic virtual call.
 531         if (morphism > 0 && morphism == result._limit) {
 532            // The morphism <= MorphismLimit.
 533            if ((morphism <  ciCallProfile::MorphismLimit) ||
 534                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 535 #ifdef ASSERT
 536              if (count > 0) {
 537                this->print_short_name(tty);
 538                tty->print_cr(" @ bci:%d", bci);
 539                this->print_codes();
 540                assert(false, "this call site should not be polymorphic");
 541              }
 542 #endif
 543              result._morphism = morphism;
 544            }
 545         }
 546         // Make the count consistent if this is a call profile. If count is
 547         // zero or less, presume that this is a typecheck profile and
 548         // do nothing.  Otherwise, increase count to be the sum of all
 549         // receiver's counts.
 550         if (count >= 0) {
 551           count += receivers_count_total;
 552         }
 553       }
 554       result._count = count;
 555     }
 556   }
 557   return result;
 558 }
 559 
 560 // ------------------------------------------------------------------
 561 // Add new receiver and sort data by receiver's profile count.
 562 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 563   // Add new receiver and sort data by receiver's counts when we have space
 564   // for it otherwise replace the less called receiver (less called receiver
 565   // is placed to the last array element which is not used).
 566   // First array's element contains most called receiver.
 567   int i = _limit;
 568   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 569     _receiver[i] = _receiver[i-1];
 570     _receiver_count[i] = _receiver_count[i-1];
 571   }
 572   _receiver[i] = receiver;
 573   _receiver_count[i] = receiver_count;
 574   if (_limit < MorphismLimit) _limit++;
 575 }
 576 
 577 
 578 void ciMethod::assert_virtual_call_type_ok(int bci) {
 579   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
 580          java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 581 }
 582 
 583 void ciMethod::assert_call_type_ok(int bci) {
 584   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
 585          java_code_at_bci(bci) == Bytecodes::_invokespecial ||
 586          java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 587 }
 588 
 589 /**
 590  * Check whether profiling provides a type for the argument i to the
 591  * call at bci bci
 592  *
 593  * @param [in]bci         bci of the call
 594  * @param [in]i           argument number
 595  * @param [out]type       profiled type of argument, NULL if none
 596  * @param [out]maybe_null true if null was seen for argument
 597  * @return                true if profiling exists
 598  *
 599  */
 600 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) {
 601   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 602     ciProfileData* data = method_data()->bci_to_data(bci);
 603     if (data != NULL) {
 604       if (data->is_VirtualCallTypeData()) {
 605         assert_virtual_call_type_ok(bci);
 606         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 607         if (i >= call->number_of_arguments()) {
 608           return false;
 609         }
 610         type = call->valid_argument_type(i);
 611         maybe_null = call->argument_maybe_null(i);
 612         return true;
 613       } else if (data->is_CallTypeData()) {
 614         assert_call_type_ok(bci);
 615         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 616         if (i >= call->number_of_arguments()) {
 617           return false;
 618         }
 619         type = call->valid_argument_type(i);
 620         maybe_null = call->argument_maybe_null(i);
 621         return true;
 622       }
 623     }
 624   }
 625   return false;
 626 }
 627 
 628 /**
 629  * Check whether profiling provides a type for the return value from
 630  * the call at bci bci
 631  *
 632  * @param [in]bci         bci of the call
 633  * @param [out]type       profiled type of argument, NULL if none
 634  * @param [out]maybe_null true if null was seen for argument
 635  * @return                true if profiling exists
 636  *
 637  */
 638 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
 639   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
 640     ciProfileData* data = method_data()->bci_to_data(bci);
 641     if (data != NULL) {
 642       if (data->is_VirtualCallTypeData()) {
 643         assert_virtual_call_type_ok(bci);
 644         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 645         type = call->valid_return_type();
 646         maybe_null = call->return_maybe_null();
 647         return true;
 648       } else if (data->is_CallTypeData()) {
 649         assert_call_type_ok(bci);
 650         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 651         type = call->valid_return_type();
 652         maybe_null = call->return_maybe_null();
 653         return true;
 654       }
 655     }
 656   }
 657   return false;
 658 }
 659 
 660 /**
 661  * Check whether profiling provides a type for the parameter i
 662  *
 663  * @param [in]i           parameter number
 664  * @param [out]type       profiled type of parameter, NULL if none
 665  * @param [out]maybe_null true if null was seen for parameter
 666  * @return                true if profiling exists
 667  *
 668  */
 669 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
 670   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 671     ciParametersTypeData* parameters = method_data()->parameters_type_data();
 672     if (parameters != NULL && i < parameters->number_of_parameters()) {
 673       type = parameters->valid_parameter_type(i);
 674       maybe_null = parameters->parameter_maybe_null(i);
 675       return true;
 676     }
 677   }
 678   return false;
 679 }
 680 
 681 
 682 // ------------------------------------------------------------------
 683 // ciMethod::find_monomorphic_target
 684 //
 685 // Given a certain calling environment, find the monomorphic target
 686 // for the call.  Return NULL if the call is not monomorphic in
 687 // its calling environment, or if there are only abstract methods.
 688 // The returned method is never abstract.
 689 // Note: If caller uses a non-null result, it must inform dependencies
 690 // via assert_unique_concrete_method or assert_leaf_type.
 691 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 692                                             ciInstanceKlass* callee_holder,
 693                                             ciInstanceKlass* actual_recv,
 694                                             bool check_access) {
 695   check_is_loaded();
 696 
 697   if (actual_recv->is_interface()) {
 698     // %%% We cannot trust interface types, yet.  See bug 6312651.
 699     return NULL;
 700   }
 701 
 702   ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
 703   if (root_m == NULL) {
 704     // Something went wrong looking up the actual receiver method.
 705     return NULL;
 706   }
 707   assert(!root_m->is_abstract(), "resolve_invoke promise");
 708 
 709   // Make certain quick checks even if UseCHA is false.
 710 
 711   // Is it private or final?
 712   if (root_m->can_be_statically_bound()) {
 713     return root_m;
 714   }
 715 
 716   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
 717     // Easy case.  There is no other place to put a method, so don't bother
 718     // to go through the VM_ENTRY_MARK and all the rest.
 719     return root_m;
 720   }
 721 
 722   // Array methods (clone, hashCode, etc.) are always statically bound.
 723   // If we were to see an array type here, we'd return root_m.
 724   // However, this method processes only ciInstanceKlasses.  (See 4962591.)
 725   // The inline_native_clone intrinsic narrows Object to T[] properly,
 726   // so there is no need to do the same job here.
 727 
 728   if (!UseCHA)  return NULL;
 729 
 730   VM_ENTRY_MARK;
 731 
 732   // Disable CHA for default methods for now
 733   if (root_m->get_Method()->is_default_method()) {
 734     return NULL;
 735   }
 736 
 737   methodHandle target;
 738   {
 739     MutexLocker locker(Compile_lock);
 740     Klass* context = actual_recv->get_Klass();
 741     target = Dependencies::find_unique_concrete_method(context,
 742                                                        root_m->get_Method());
 743     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
 744   }
 745 
 746 #ifndef PRODUCT
 747   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
 748     tty->print("found a non-root unique target method");
 749     tty->print_cr("  context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
 750     tty->print("  method  = ");
 751     target->print_short_name(tty);
 752     tty->cr();
 753   }
 754 #endif //PRODUCT
 755 
 756   if (target() == NULL) {
 757     return NULL;
 758   }
 759   if (target() == root_m->get_Method()) {
 760     return root_m;
 761   }
 762   if (!root_m->is_public() &&
 763       !root_m->is_protected()) {
 764     // If we are going to reason about inheritance, it's easiest
 765     // if the method in question is public, protected, or private.
 766     // If the answer is not root_m, it is conservatively correct
 767     // to return NULL, even if the CHA encountered irrelevant
 768     // methods in other packages.
 769     // %%% TO DO: Work out logic for package-private methods
 770     // with the same name but different vtable indexes.
 771     return NULL;
 772   }
 773   return CURRENT_THREAD_ENV->get_method(target());
 774 }
 775 
 776 // ------------------------------------------------------------------
 777 // ciMethod::resolve_invoke
 778 //
 779 // Given a known receiver klass, find the target for the call.
 780 // Return NULL if the call has no target or the target is abstract.
 781 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
 782    check_is_loaded();
 783    VM_ENTRY_MARK;
 784 
 785    KlassHandle caller_klass (THREAD, caller->get_Klass());
 786    KlassHandle h_recv       (THREAD, exact_receiver->get_Klass());
 787    KlassHandle h_resolved   (THREAD, holder()->get_Klass());
 788    Symbol* h_name      = name()->get_symbol();
 789    Symbol* h_signature = signature()->get_symbol();
 790 
 791    LinkInfo link_info(h_resolved, h_name, h_signature, caller_klass, check_access);
 792    methodHandle m;
 793    // Only do exact lookup if receiver klass has been linked.  Otherwise,
 794    // the vtable has not been setup, and the LinkResolver will fail.
 795    if (h_recv->oop_is_array()
 796         ||
 797        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
 798      if (holder()->is_interface()) {
 799        m = LinkResolver::resolve_interface_call_or_null(h_recv, link_info);
 800      } else {
 801        m = LinkResolver::resolve_virtual_call_or_null(h_recv, link_info);
 802      }
 803    }
 804 
 805    if (m.is_null()) {
 806      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 807      return NULL;
 808    }
 809 
 810    ciMethod* result = this;
 811    if (m() != get_Method()) {
 812      result = CURRENT_THREAD_ENV->get_method(m());
 813    }
 814 
 815    // Don't return abstract methods because they aren't
 816    // optimizable or interesting.
 817    if (result->is_abstract()) {
 818      return NULL;
 819    } else {
 820      return result;
 821    }
 822 }
 823 
 824 // ------------------------------------------------------------------
 825 // ciMethod::resolve_vtable_index
 826 //
 827 // Given a known receiver klass, find the vtable index for the call.
 828 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 829 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 830    check_is_loaded();
 831 
 832    int vtable_index = Method::invalid_vtable_index;
 833    // Only do lookup if receiver klass has been linked.  Otherwise,
 834    // the vtable has not been setup, and the LinkResolver will fail.
 835    if (!receiver->is_interface()
 836        && (!receiver->is_instance_klass() ||
 837            receiver->as_instance_klass()->is_linked())) {
 838      VM_ENTRY_MARK;
 839 
 840      KlassHandle caller_klass (THREAD, caller->get_Klass());
 841      KlassHandle h_recv       (THREAD, receiver->get_Klass());
 842      Symbol* h_name = name()->get_symbol();
 843      Symbol* h_signature = signature()->get_symbol();
 844 
 845      LinkInfo link_info(h_recv, h_name, h_signature, caller_klass);
 846      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, link_info);
 847      if (vtable_index == Method::nonvirtual_vtable_index) {
 848        // A statically bound method.  Return "no such index".
 849        vtable_index = Method::invalid_vtable_index;
 850      }
 851    }
 852 
 853    return vtable_index;
 854 }
 855 
 856 // ------------------------------------------------------------------
 857 // ciMethod::interpreter_call_site_count
 858 int ciMethod::interpreter_call_site_count(int bci) {
 859   if (method_data() != NULL) {
 860     ResourceMark rm;
 861     ciProfileData* data = method_data()->bci_to_data(bci);
 862     if (data != NULL && data->is_CounterData()) {
 863       return scale_count(data->as_CounterData()->count());
 864     }
 865   }
 866   return -1;  // unknown
 867 }
 868 
 869 // ------------------------------------------------------------------
 870 // ciMethod::get_field_at_bci
 871 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 872   ciBytecodeStream iter(this);
 873   iter.reset_to_bci(bci);
 874   iter.next();
 875   return iter.get_field(will_link);
 876 }
 877 
 878 // ------------------------------------------------------------------
 879 // ciMethod::get_method_at_bci
 880 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 881   ciBytecodeStream iter(this);
 882   iter.reset_to_bci(bci);
 883   iter.next();
 884   return iter.get_method(will_link, declared_signature);
 885 }
 886 
 887 // ------------------------------------------------------------------
 888 // Adjust a CounterData count to be commensurate with
 889 // interpreter_invocation_count.  If the MDO exists for
 890 // only 25% of the time the method exists, then the
 891 // counts in the MDO should be scaled by 4X, so that
 892 // they can be usefully and stably compared against the
 893 // invocation counts in methods.
 894 int ciMethod::scale_count(int count, float prof_factor) {
 895   if (count > 0 && method_data() != NULL) {
 896     int counter_life;
 897     int method_life = interpreter_invocation_count();
 898     if (TieredCompilation) {
 899       // In tiered the MDO's life is measured directly, so just use the snapshotted counters
 900       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
 901     } else {
 902       int current_mileage = method_data()->current_mileage();
 903       int creation_mileage = method_data()->creation_mileage();
 904       counter_life = current_mileage - creation_mileage;
 905     }
 906 
 907     // counter_life due to backedge_counter could be > method_life
 908     if (counter_life > method_life)
 909       counter_life = method_life;
 910     if (0 < counter_life && counter_life <= method_life) {
 911       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 912       count = (count > 0) ? count : 1;
 913     }
 914   }
 915   return count;
 916 }
 917 
 918 
 919 // ------------------------------------------------------------------
 920 // ciMethod::is_special_get_caller_class_method
 921 //
 922 bool ciMethod::is_ignored_by_security_stack_walk() const {
 923   check_is_loaded();
 924   VM_ENTRY_MARK;
 925   return get_Method()->is_ignored_by_security_stack_walk();
 926 }
 927 
 928 
 929 // ------------------------------------------------------------------
 930 // invokedynamic support
 931 
 932 // ------------------------------------------------------------------
 933 // ciMethod::is_method_handle_intrinsic
 934 //
 935 // Return true if the method is an instance of the JVM-generated
 936 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 937 bool ciMethod::is_method_handle_intrinsic() const {
 938   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 939   return (MethodHandles::is_signature_polymorphic(iid) &&
 940           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 941 }
 942 
 943 // ------------------------------------------------------------------
 944 // ciMethod::is_compiled_lambda_form
 945 //
 946 // Return true if the method is a generated MethodHandle adapter.
 947 // These are built by Java code.
 948 bool ciMethod::is_compiled_lambda_form() const {
 949   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 950   return iid == vmIntrinsics::_compiledLambdaForm;
 951 }
 952 
 953 // ------------------------------------------------------------------
 954 // ciMethod::has_member_arg
 955 //
 956 // Return true if the method is a linker intrinsic like _linkToVirtual.
 957 // These are built by the JVM.
 958 bool ciMethod::has_member_arg() const {
 959   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 960   return (MethodHandles::is_signature_polymorphic(iid) &&
 961           MethodHandles::has_member_arg(iid));
 962 }
 963 
 964 // ------------------------------------------------------------------
 965 // ciMethod::ensure_method_data
 966 //
 967 // Generate new MethodData* objects at compile time.
 968 // Return true if allocation was successful or no MDO is required.
 969 bool ciMethod::ensure_method_data(methodHandle h_m) {
 970   EXCEPTION_CONTEXT;
 971   if (is_native() || is_abstract() || h_m()->is_accessor()) {
 972     return true;
 973   }
 974   if (h_m()->method_data() == NULL) {
 975     Method::build_interpreter_method_data(h_m, THREAD);
 976     if (HAS_PENDING_EXCEPTION) {
 977       CLEAR_PENDING_EXCEPTION;
 978     }
 979   }
 980   if (h_m()->method_data() != NULL) {
 981     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 982     _method_data->load_data();
 983     return true;
 984   } else {
 985     _method_data = CURRENT_ENV->get_empty_methodData();
 986     return false;
 987   }
 988 }
 989 
 990 // public, retroactive version
 991 bool ciMethod::ensure_method_data() {
 992   bool result = true;
 993   if (_method_data == NULL || _method_data->is_empty()) {
 994     GUARDED_VM_ENTRY({
 995       result = ensure_method_data(get_Method());
 996     });
 997   }
 998   return result;
 999 }
1000 
1001 
1002 // ------------------------------------------------------------------
1003 // ciMethod::method_data
1004 //
1005 ciMethodData* ciMethod::method_data() {
1006   if (_method_data != NULL) {
1007     return _method_data;
1008   }
1009   VM_ENTRY_MARK;
1010   ciEnv* env = CURRENT_ENV;
1011   Thread* my_thread = JavaThread::current();
1012   methodHandle h_m(my_thread, get_Method());
1013 
1014   if (h_m()->method_data() != NULL) {
1015     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1016     _method_data->load_data();
1017   } else {
1018     _method_data = CURRENT_ENV->get_empty_methodData();
1019   }
1020   return _method_data;
1021 
1022 }
1023 
1024 // ------------------------------------------------------------------
1025 // ciMethod::method_data_or_null
1026 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1027 // NULL otherwise.
1028 ciMethodData* ciMethod::method_data_or_null() {
1029   ciMethodData *md = method_data();
1030   if (md->is_empty()) {
1031     return NULL;
1032   }
1033   return md;
1034 }
1035 
1036 // ------------------------------------------------------------------
1037 // ciMethod::ensure_method_counters
1038 //
1039 MethodCounters* ciMethod::ensure_method_counters() {
1040   check_is_loaded();
1041   VM_ENTRY_MARK;
1042   methodHandle mh(THREAD, get_Method());
1043   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1044   return method_counters;
1045 }
1046 
1047 // ------------------------------------------------------------------
1048 // ciMethod::should_inline
1049 //
1050 // Should this method be inlined during compilation?
1051 bool ciMethod::should_inline() {
1052   check_is_loaded();
1053   VM_ENTRY_MARK;
1054   methodHandle mh(THREAD, get_Method());
1055   return CompilerOracle::should_inline(mh);
1056 }
1057 
1058 // ------------------------------------------------------------------
1059 // ciMethod::should_not_inline
1060 //
1061 // Should this method be disallowed from inlining during compilation?
1062 bool ciMethod::should_not_inline() {
1063   check_is_loaded();
1064   VM_ENTRY_MARK;
1065   methodHandle mh(THREAD, get_Method());
1066   return CompilerOracle::should_not_inline(mh);
1067 }
1068 
1069 // ------------------------------------------------------------------
1070 // ciMethod::should_print_assembly
1071 //
1072 // Should the compiler print the generated code for this method?
1073 bool ciMethod::should_print_assembly() {
1074   check_is_loaded();
1075   VM_ENTRY_MARK;
1076   methodHandle mh(THREAD, get_Method());
1077   return CompilerOracle::should_print(mh);
1078 }
1079 
1080 // ------------------------------------------------------------------
1081 // ciMethod::break_at_execute
1082 //
1083 // Should the compiler insert a breakpoint into the generated code
1084 // method?
1085 bool ciMethod::break_at_execute() {
1086   check_is_loaded();
1087   VM_ENTRY_MARK;
1088   methodHandle mh(THREAD, get_Method());
1089   return CompilerOracle::should_break_at(mh);
1090 }
1091 
1092 // ------------------------------------------------------------------
1093 // ciMethod::has_option
1094 //
1095 bool ciMethod::has_option(const char* option) {
1096   check_is_loaded();
1097   VM_ENTRY_MARK;
1098   methodHandle mh(THREAD, get_Method());
1099   return CompilerOracle::has_option_string(mh, option);
1100 }
1101 
1102 // ------------------------------------------------------------------
1103 // ciMethod::has_option_value
1104 //
1105 template<typename T>
1106 bool ciMethod::has_option_value(const char* option, T& value) {
1107   check_is_loaded();
1108   VM_ENTRY_MARK;
1109   methodHandle mh(THREAD, get_Method());
1110   return CompilerOracle::has_option_value(mh, option, value);
1111 }
1112 // Explicit instantiation for all OptionTypes supported.
1113 template bool ciMethod::has_option_value<intx>(const char* option, intx& value);
1114 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value);
1115 template bool ciMethod::has_option_value<bool>(const char* option, bool& value);
1116 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value);
1117 template bool ciMethod::has_option_value<double>(const char* option, double& value);
1118 
1119 // ------------------------------------------------------------------
1120 // ciMethod::can_be_compiled
1121 //
1122 // Have previous compilations of this method succeeded?
1123 bool ciMethod::can_be_compiled() {
1124   check_is_loaded();
1125   ciEnv* env = CURRENT_ENV;
1126   if (is_c1_compile(env->comp_level())) {
1127     return _is_c1_compilable;
1128   }
1129   return _is_c2_compilable;
1130 }
1131 
1132 // ------------------------------------------------------------------
1133 // ciMethod::set_not_compilable
1134 //
1135 // Tell the VM that this method cannot be compiled at all.
1136 void ciMethod::set_not_compilable(const char* reason) {
1137   check_is_loaded();
1138   VM_ENTRY_MARK;
1139   ciEnv* env = CURRENT_ENV;
1140   if (is_c1_compile(env->comp_level())) {
1141     _is_c1_compilable = false;
1142   } else {
1143     _is_c2_compilable = false;
1144   }
1145   get_Method()->set_not_compilable(env->comp_level(), true, reason);
1146 }
1147 
1148 // ------------------------------------------------------------------
1149 // ciMethod::can_be_osr_compiled
1150 //
1151 // Have previous compilations of this method succeeded?
1152 //
1153 // Implementation note: the VM does not currently keep track
1154 // of failed OSR compilations per bci.  The entry_bci parameter
1155 // is currently unused.
1156 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1157   check_is_loaded();
1158   VM_ENTRY_MARK;
1159   ciEnv* env = CURRENT_ENV;
1160   return !get_Method()->is_not_osr_compilable(env->comp_level());
1161 }
1162 
1163 // ------------------------------------------------------------------
1164 // ciMethod::has_compiled_code
1165 bool ciMethod::has_compiled_code() {
1166   return instructions_size() > 0;
1167 }
1168 
1169 int ciMethod::comp_level() {
1170   check_is_loaded();
1171   VM_ENTRY_MARK;
1172   nmethod* nm = get_Method()->code();
1173   if (nm != NULL) return nm->comp_level();
1174   return 0;
1175 }
1176 
1177 int ciMethod::highest_osr_comp_level() {
1178   check_is_loaded();
1179   VM_ENTRY_MARK;
1180   return get_Method()->highest_osr_comp_level();
1181 }
1182 
1183 // ------------------------------------------------------------------
1184 // ciMethod::code_size_for_inlining
1185 //
1186 // Code size for inlining decisions.  This method returns a code
1187 // size of 1 for methods which has the ForceInline annotation.
1188 int ciMethod::code_size_for_inlining() {
1189   check_is_loaded();
1190   if (get_Method()->force_inline()) {
1191     return 1;
1192   }
1193   return code_size();
1194 }
1195 
1196 // ------------------------------------------------------------------
1197 // ciMethod::instructions_size
1198 //
1199 // This is a rough metric for "fat" methods, compared before inlining
1200 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1201 // junk like exception handler, stubs, and constant table, which are
1202 // not highly relevant to an inlined method.  So we use the more
1203 // specific accessor nmethod::insts_size.
1204 int ciMethod::instructions_size() {
1205   if (_instructions_size == -1) {
1206     GUARDED_VM_ENTRY(
1207                      nmethod* code = get_Method()->code();
1208                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1209                        _instructions_size = code->insts_end() - code->verified_entry_point();
1210                      } else {
1211                        _instructions_size = 0;
1212                      }
1213                      );
1214   }
1215   return _instructions_size;
1216 }
1217 
1218 // ------------------------------------------------------------------
1219 // ciMethod::log_nmethod_identity
1220 void ciMethod::log_nmethod_identity(xmlStream* log) {
1221   GUARDED_VM_ENTRY(
1222     nmethod* code = get_Method()->code();
1223     if (code != NULL) {
1224       code->log_identity(log);
1225     }
1226   )
1227 }
1228 
1229 // ------------------------------------------------------------------
1230 // ciMethod::is_not_reached
1231 bool ciMethod::is_not_reached(int bci) {
1232   check_is_loaded();
1233   VM_ENTRY_MARK;
1234   return Interpreter::is_not_reached(
1235                methodHandle(THREAD, get_Method()), bci);
1236 }
1237 
1238 // ------------------------------------------------------------------
1239 // ciMethod::was_never_executed
1240 bool ciMethod::was_executed_more_than(int times) {
1241   VM_ENTRY_MARK;
1242   return get_Method()->was_executed_more_than(times);
1243 }
1244 
1245 // ------------------------------------------------------------------
1246 // ciMethod::has_unloaded_classes_in_signature
1247 bool ciMethod::has_unloaded_classes_in_signature() {
1248   VM_ENTRY_MARK;
1249   {
1250     EXCEPTION_MARK;
1251     methodHandle m(THREAD, get_Method());
1252     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1253     if( HAS_PENDING_EXCEPTION ) {
1254       CLEAR_PENDING_EXCEPTION;
1255       return true;     // Declare that we may have unloaded classes
1256     }
1257     return has_unloaded;
1258   }
1259 }
1260 
1261 // ------------------------------------------------------------------
1262 // ciMethod::is_klass_loaded
1263 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1264   VM_ENTRY_MARK;
1265   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1266 }
1267 
1268 // ------------------------------------------------------------------
1269 // ciMethod::check_call
1270 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1271   // This method is used only in C2 from InlineTree::ok_to_inline,
1272   // and is only used under -Xcomp or -XX:CompileTheWorld.
1273   // It appears to fail when applied to an invokeinterface call site.
1274   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1275   VM_ENTRY_MARK;
1276   {
1277     EXCEPTION_MARK;
1278     HandleMark hm(THREAD);
1279     constantPoolHandle pool (THREAD, get_Method()->constants());
1280     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1281     methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1282     if (HAS_PENDING_EXCEPTION) {
1283       CLEAR_PENDING_EXCEPTION;
1284       return false;
1285     } else {
1286       return (spec_method->is_static() == is_static);
1287     }
1288   }
1289   return false;
1290 }
1291 
1292 // ------------------------------------------------------------------
1293 // ciMethod::profile_aging
1294 //
1295 // Should the method be compiled with an age counter?
1296 bool ciMethod::profile_aging() const {
1297   return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1298                           !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1299 }
1300 // ------------------------------------------------------------------
1301 // ciMethod::print_codes
1302 //
1303 // Print the bytecodes for this method.
1304 void ciMethod::print_codes_on(outputStream* st) {
1305   check_is_loaded();
1306   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1307 }
1308 
1309 
1310 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1311   check_is_loaded(); \
1312   VM_ENTRY_MARK; \
1313   return get_Method()->flag_accessor(); \
1314 }
1315 
1316 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1317 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1318 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1319 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1320 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1321 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }
1322 
1323 bool ciMethod::is_boxing_method() const {
1324   if (holder()->is_box_klass()) {
1325     switch (intrinsic_id()) {
1326       case vmIntrinsics::_Boolean_valueOf:
1327       case vmIntrinsics::_Byte_valueOf:
1328       case vmIntrinsics::_Character_valueOf:
1329       case vmIntrinsics::_Short_valueOf:
1330       case vmIntrinsics::_Integer_valueOf:
1331       case vmIntrinsics::_Long_valueOf:
1332       case vmIntrinsics::_Float_valueOf:
1333       case vmIntrinsics::_Double_valueOf:
1334         return true;
1335       default:
1336         return false;
1337     }
1338   }
1339   return false;
1340 }
1341 
1342 bool ciMethod::is_unboxing_method() const {
1343   if (holder()->is_box_klass()) {
1344     switch (intrinsic_id()) {
1345       case vmIntrinsics::_booleanValue:
1346       case vmIntrinsics::_byteValue:
1347       case vmIntrinsics::_charValue:
1348       case vmIntrinsics::_shortValue:
1349       case vmIntrinsics::_intValue:
1350       case vmIntrinsics::_longValue:
1351       case vmIntrinsics::_floatValue:
1352       case vmIntrinsics::_doubleValue:
1353         return true;
1354       default:
1355         return false;
1356     }
1357   }
1358   return false;
1359 }
1360 
1361 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1362 #ifdef COMPILER2
1363   if (_bcea == NULL) {
1364     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1365   }
1366   return _bcea;
1367 #else // COMPILER2
1368   ShouldNotReachHere();
1369   return NULL;
1370 #endif // COMPILER2
1371 }
1372 
1373 ciMethodBlocks  *ciMethod::get_method_blocks() {
1374   Arena *arena = CURRENT_ENV->arena();
1375   if (_method_blocks == NULL) {
1376     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1377   }
1378   return _method_blocks;
1379 }
1380 
1381 #undef FETCH_FLAG_FROM_VM
1382 
1383 void ciMethod::dump_name_as_ascii(outputStream* st) {
1384   Method* method = get_Method();
1385   st->print("%s %s %s",
1386             method->klass_name()->as_quoted_ascii(),
1387             method->name()->as_quoted_ascii(),
1388             method->signature()->as_quoted_ascii());
1389 }
1390 
1391 void ciMethod::dump_replay_data(outputStream* st) {
1392   ResourceMark rm;
1393   Method* method = get_Method();
1394   MethodCounters* mcs = method->method_counters();
1395   st->print("ciMethod ");
1396   dump_name_as_ascii(st);
1397   st->print_cr(" %d %d %d %d %d",
1398                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1399                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1400                interpreter_invocation_count(),
1401                interpreter_throwout_count(),
1402                _instructions_size);
1403 }
1404 
1405 // ------------------------------------------------------------------
1406 // ciMethod::print_codes
1407 //
1408 // Print a range of the bytecodes for this method.
1409 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1410   check_is_loaded();
1411   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1412 }
1413 
1414 // ------------------------------------------------------------------
1415 // ciMethod::print_name
1416 //
1417 // Print the name of this method, including signature and some flags.
1418 void ciMethod::print_name(outputStream* st) {
1419   check_is_loaded();
1420   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1421 }
1422 
1423 // ------------------------------------------------------------------
1424 // ciMethod::print_short_name
1425 //
1426 // Print the name of this method, without signature.
1427 void ciMethod::print_short_name(outputStream* st) {
1428   if (is_loaded()) {
1429     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1430   } else {
1431     // Fall back if method is not loaded.
1432     holder()->print_name_on(st);
1433     st->print("::");
1434     name()->print_symbol_on(st);
1435     if (WizardMode)
1436       signature()->as_symbol()->print_symbol_on(st);
1437   }
1438 }
1439 
1440 // ------------------------------------------------------------------
1441 // ciMethod::print_impl
1442 //
1443 // Implementation of the print method.
1444 void ciMethod::print_impl(outputStream* st) {
1445   ciMetadata::print_impl(st);
1446   st->print(" name=");
1447   name()->print_symbol_on(st);
1448   st->print(" holder=");
1449   holder()->print_name_on(st);
1450   st->print(" signature=");
1451   signature()->as_symbol()->print_symbol_on(st);
1452   if (is_loaded()) {
1453     st->print(" loaded=true");
1454     st->print(" arg_size=%d", arg_size());
1455     st->print(" flags=");
1456     flags().print_member_flags(st);
1457   } else {
1458     st->print(" loaded=false");
1459   }
1460 }
1461 
1462 #if INCLUDE_TRACE
1463 TraceStructCiMethod ciMethod::to_trace_struct() const {
1464   TraceStructCiMethod result;
1465   result.set_class(holder()->name()->as_utf8());
1466   result.set_name(name()->as_utf8());
1467   result.set_signature(signature()->as_symbol()->as_utf8());
1468   return result;
1469 }
1470 #endif