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