1 /*
   2  * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "ci/ciCallProfile.hpp"
  27 #include "ci/ciExceptionHandler.hpp"
  28 #include "ci/ciInstanceKlass.hpp"
  29 #include "ci/ciMethod.hpp"
  30 #include "ci/ciMethodBlocks.hpp"
  31 #include "ci/ciMethodData.hpp"
  32 #include "ci/ciStreams.hpp"
  33 #include "ci/ciSymbol.hpp"
  34 #include "ci/ciReplay.hpp"
  35 #include "ci/ciUtilities.hpp"
  36 #include "classfile/systemDictionary.hpp"
  37 #include "compiler/abstractCompiler.hpp"
  38 #include "compiler/methodLiveness.hpp"
  39 #include "interpreter/interpreter.hpp"
  40 #include "interpreter/linkResolver.hpp"
  41 #include "interpreter/oopMapCache.hpp"
  42 #include "memory/allocation.inline.hpp"
  43 #include "memory/resourceArea.hpp"
  44 #include "oops/generateOopMap.hpp"
  45 #include "oops/oop.inline.hpp"
  46 #include "prims/nativeLookup.hpp"
  47 #include "runtime/deoptimization.hpp"
  48 #include "utilities/bitMap.inline.hpp"
  49 #include "utilities/xmlstream.hpp"
  50 #include "trace/tracing.hpp"
  51 #ifdef COMPILER2
  52 #include "ci/bcEscapeAnalyzer.hpp"
  53 #include "ci/ciTypeFlow.hpp"
  54 #include "oops/method.hpp"
  55 #endif
  56 #ifdef SHARK
  57 #include "ci/ciTypeFlow.hpp"
  58 #include "oops/method.hpp"
  59 #endif
  60 
  61 // ciMethod
  62 //
  63 // This class represents a Method* in the HotSpot virtual
  64 // machine.
  65 
  66 
  67 // ------------------------------------------------------------------
  68 // ciMethod::ciMethod
  69 //
  70 // Loaded method.
  71 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) :
  72   ciMetadata(h_m()),
  73   _holder(holder)
  74 {
  75   assert(h_m() != NULL, "no null method");
  76 
  77   if (LogTouchedMethods) {
  78     h_m()->log_touched(Thread::current());
  79   }
  80   // These fields are always filled in in loaded methods.
  81   _flags = ciFlags(h_m()->access_flags());
  82 
  83   // Easy to compute, so fill them in now.
  84   _max_stack          = h_m()->max_stack();
  85   _max_locals         = h_m()->max_locals();
  86   _code_size          = h_m()->code_size();
  87   _intrinsic_id       = h_m()->intrinsic_id();
  88   _handler_count      = h_m()->exception_table_length();
  89   _size_of_parameters = h_m()->size_of_parameters();
  90   _uses_monitors      = h_m()->access_flags().has_monitor_bytecodes();
  91   _balanced_monitors  = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
  92   _is_c1_compilable   = !h_m()->is_not_c1_compilable();
  93   _is_c2_compilable   = !h_m()->is_not_c2_compilable();
  94   _has_reserved_stack_access = h_m()->has_reserved_stack_access();
  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 #if INCLUDE_JVMTI
 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 #endif
 216 
 217   // And load the exception table.
 218   ExceptionTable exc_table(me);
 219 
 220   // Allocate one extra spot in our list of exceptions.  This
 221   // last entry will be used to represent the possibility that
 222   // an exception escapes the method.  See ciExceptionHandlerStream
 223   // for details.
 224   _exception_handlers =
 225     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
 226                                          * (_handler_count + 1));
 227   if (_handler_count > 0) {
 228     for (int i=0; i<_handler_count; i++) {
 229       _exception_handlers[i] = new (arena) ciExceptionHandler(
 230                                 holder(),
 231             /* start    */      exc_table.start_pc(i),
 232             /* limit    */      exc_table.end_pc(i),
 233             /* goto pc  */      exc_table.handler_pc(i),
 234             /* cp index */      exc_table.catch_type_index(i));
 235     }
 236   }
 237 
 238   // Put an entry at the end of our list to represent the possibility
 239   // of exceptional exit.
 240   _exception_handlers[_handler_count] =
 241     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
 242 
 243   if (CIPrintMethodCodes) {
 244     print_codes();
 245   }
 246 }
 247 
 248 
 249 // ------------------------------------------------------------------
 250 // ciMethod::has_linenumber_table
 251 //
 252 // length unknown until decompression
 253 bool    ciMethod::has_linenumber_table() const {
 254   check_is_loaded();
 255   VM_ENTRY_MARK;
 256   return get_Method()->has_linenumber_table();
 257 }
 258 
 259 
 260 // ------------------------------------------------------------------
 261 // ciMethod::compressed_linenumber_table
 262 u_char* ciMethod::compressed_linenumber_table() const {
 263   check_is_loaded();
 264   VM_ENTRY_MARK;
 265   return get_Method()->compressed_linenumber_table();
 266 }
 267 
 268 
 269 // ------------------------------------------------------------------
 270 // ciMethod::line_number_from_bci
 271 int ciMethod::line_number_from_bci(int bci) const {
 272   check_is_loaded();
 273   VM_ENTRY_MARK;
 274   return get_Method()->line_number_from_bci(bci);
 275 }
 276 
 277 
 278 // ------------------------------------------------------------------
 279 // ciMethod::vtable_index
 280 //
 281 // Get the position of this method's entry in the vtable, if any.
 282 int ciMethod::vtable_index() {
 283   check_is_loaded();
 284   assert(holder()->is_linked(), "must be linked");
 285   VM_ENTRY_MARK;
 286   return get_Method()->vtable_index();
 287 }
 288 
 289 
 290 #ifdef SHARK
 291 // ------------------------------------------------------------------
 292 // ciMethod::itable_index
 293 //
 294 // Get the position of this method's entry in the itable, if any.
 295 int ciMethod::itable_index() {
 296   check_is_loaded();
 297   assert(holder()->is_linked(), "must be linked");
 298   VM_ENTRY_MARK;
 299   Method* m = get_Method();
 300   if (!m->has_itable_index())
 301     return Method::nonvirtual_vtable_index;
 302   return m->itable_index();
 303 }
 304 #endif // SHARK
 305 
 306 
 307 // ------------------------------------------------------------------
 308 // ciMethod::native_entry
 309 //
 310 // Get the address of this method's native code, if any.
 311 address ciMethod::native_entry() {
 312   check_is_loaded();
 313   assert(flags().is_native(), "must be native method");
 314   VM_ENTRY_MARK;
 315   Method* method = get_Method();
 316   address entry = method->native_function();
 317   assert(entry != NULL, "must be valid entry point");
 318   return entry;
 319 }
 320 
 321 
 322 // ------------------------------------------------------------------
 323 // ciMethod::interpreter_entry
 324 //
 325 // Get the entry point for running this method in the interpreter.
 326 address ciMethod::interpreter_entry() {
 327   check_is_loaded();
 328   VM_ENTRY_MARK;
 329   methodHandle mh(THREAD, get_Method());
 330   return Interpreter::entry_for_method(mh);
 331 }
 332 
 333 
 334 // ------------------------------------------------------------------
 335 // ciMethod::uses_balanced_monitors
 336 //
 337 // Does this method use monitors in a strict stack-disciplined manner?
 338 bool ciMethod::has_balanced_monitors() {
 339   check_is_loaded();
 340   if (_balanced_monitors) return true;
 341 
 342   // Analyze the method to see if monitors are used properly.
 343   VM_ENTRY_MARK;
 344   methodHandle method(THREAD, get_Method());
 345   assert(method->has_monitor_bytecodes(), "should have checked this");
 346 
 347   // Check to see if a previous compilation computed the
 348   // monitor-matching analysis.
 349   if (method->guaranteed_monitor_matching()) {
 350     _balanced_monitors = true;
 351     return true;
 352   }
 353 
 354   {
 355     EXCEPTION_MARK;
 356     ResourceMark rm(THREAD);
 357     GeneratePairingInfo gpi(method);
 358     gpi.compute_map(CATCH);
 359     if (!gpi.monitor_safe()) {
 360       return false;
 361     }
 362     method->set_guaranteed_monitor_matching();
 363     _balanced_monitors = true;
 364   }
 365   return true;
 366 }
 367 
 368 
 369 // ------------------------------------------------------------------
 370 // ciMethod::get_flow_analysis
 371 ciTypeFlow* ciMethod::get_flow_analysis() {
 372 #if defined(COMPILER2) || defined(SHARK)
 373   if (_flow == NULL) {
 374     ciEnv* env = CURRENT_ENV;
 375     _flow = new (env->arena()) ciTypeFlow(env, this);
 376     _flow->do_flow();
 377   }
 378   return _flow;
 379 #else // COMPILER2 || SHARK
 380   ShouldNotReachHere();
 381   return NULL;
 382 #endif // COMPILER2 || SHARK
 383 }
 384 
 385 
 386 // ------------------------------------------------------------------
 387 // ciMethod::get_osr_flow_analysis
 388 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 389 #if defined(COMPILER2) || defined(SHARK)
 390   // OSR entry points are always place after a call bytecode of some sort
 391   assert(osr_bci >= 0, "must supply valid OSR entry point");
 392   ciEnv* env = CURRENT_ENV;
 393   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 394   flow->do_flow();
 395   return flow;
 396 #else // COMPILER2 || SHARK
 397   ShouldNotReachHere();
 398   return NULL;
 399 #endif // COMPILER2 || SHARK
 400 }
 401 
 402 // ------------------------------------------------------------------
 403 // ciMethod::raw_liveness_at_bci
 404 //
 405 // Which local variables are live at a specific bci?
 406 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 407   check_is_loaded();
 408   if (_liveness == NULL) {
 409     // Create the liveness analyzer.
 410     Arena* arena = CURRENT_ENV->arena();
 411     _liveness = new (arena) MethodLiveness(arena, this);
 412     _liveness->compute_liveness();
 413   }
 414   return _liveness->get_liveness_at(bci);
 415 }
 416 
 417 // ------------------------------------------------------------------
 418 // ciMethod::liveness_at_bci
 419 //
 420 // Which local variables are live at a specific bci?  When debugging
 421 // will return true for all locals in some cases to improve debug
 422 // information.
 423 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 424   MethodLivenessResult result = raw_liveness_at_bci(bci);
 425   if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
 426     // Keep all locals live for the user's edification and amusement.
 427     result.at_put_range(0, result.size(), true);
 428   }
 429   return result;
 430 }
 431 
 432 // ciMethod::live_local_oops_at_bci
 433 //
 434 // find all the live oops in the locals array for a particular bci
 435 // Compute what the interpreter believes by using the interpreter
 436 // oopmap generator. This is used as a double check during osr to
 437 // guard against conservative result from MethodLiveness making us
 438 // think a dead oop is live.  MethodLiveness is conservative in the
 439 // sense that it may consider locals to be live which cannot be live,
 440 // like in the case where a local could contain an oop or  a primitive
 441 // along different paths.  In that case the local must be dead when
 442 // those paths merge. Since the interpreter's viewpoint is used when
 443 // gc'ing an interpreter frame we need to use its viewpoint  during
 444 // OSR when loading the locals.
 445 
 446 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
 447   VM_ENTRY_MARK;
 448   InterpreterOopMap mask;
 449   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
 450   int mask_size = max_locals();
 451   ResourceBitMap result(mask_size);
 452   result.clear();
 453   int i;
 454   for (i = 0; i < mask_size ; i++ ) {
 455     if (mask.is_oop(i)) result.set_bit(i);
 456   }
 457   return result;
 458 }
 459 
 460 
 461 #ifdef COMPILER1
 462 // ------------------------------------------------------------------
 463 // ciMethod::bci_block_start
 464 //
 465 // Marks all bcis where a new basic block starts
 466 const BitMap& ciMethod::bci_block_start() {
 467   check_is_loaded();
 468   if (_liveness == NULL) {
 469     // Create the liveness analyzer.
 470     Arena* arena = CURRENT_ENV->arena();
 471     _liveness = new (arena) MethodLiveness(arena, this);
 472     _liveness->compute_liveness();
 473   }
 474 
 475   return _liveness->get_bci_block_start();
 476 }
 477 #endif // COMPILER1
 478 
 479 
 480 // ------------------------------------------------------------------
 481 // ciMethod::call_profile_at_bci
 482 //
 483 // Get the ciCallProfile for the invocation of this method.
 484 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 485 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 486   ResourceMark rm;
 487   ciCallProfile result;
 488   if (method_data() != NULL && method_data()->is_mature()) {
 489     ciProfileData* data = method_data()->bci_to_data(bci);
 490     if (data != NULL && data->is_CounterData()) {
 491       // Every profiled call site has a counter.
 492       int count = data->as_CounterData()->count();
 493 
 494       if (!data->is_ReceiverTypeData()) {
 495         result._receiver_count[0] = 0;  // that's a definite zero
 496       } else { // ReceiverTypeData is a subclass of CounterData
 497         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 498         // In addition, virtual call sites have receiver type information
 499         int receivers_count_total = 0;
 500         int morphism = 0;
 501         // Precompute morphism for the possible fixup
 502         for (uint i = 0; i < call->row_limit(); i++) {
 503           ciKlass* receiver = call->receiver(i);
 504           if (receiver == NULL)  continue;
 505           morphism++;
 506         }
 507         int epsilon = 0;
 508         if (TieredCompilation && ProfileInterpreter) {
 509           // Interpreter and C1 treat final and special invokes differently.
 510           // C1 will record a type, whereas the interpreter will just
 511           // increment the count. Detect this case.
 512           if (morphism == 1 && count > 0) {
 513             epsilon = count;
 514             count = 0;
 515           }
 516         }
 517         for (uint i = 0; i < call->row_limit(); i++) {
 518           ciKlass* receiver = call->receiver(i);
 519           if (receiver == NULL)  continue;
 520           int rcount = call->receiver_count(i) + epsilon;
 521           if (rcount == 0) rcount = 1; // Should be valid value
 522           receivers_count_total += rcount;
 523           // Add the receiver to result data.
 524           result.add_receiver(receiver, rcount);
 525           // If we extend profiling to record methods,
 526           // we will set result._method also.
 527         }
 528         // Determine call site's morphism.
 529         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
 530         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
 531         // The call site count is > 0 in the case of a polymorphic virtual call.
 532         if (morphism > 0 && morphism == result._limit) {
 533            // The morphism <= MorphismLimit.
 534            if ((morphism <  ciCallProfile::MorphismLimit) ||
 535                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 536 #ifdef ASSERT
 537              if (count > 0) {
 538                this->print_short_name(tty);
 539                tty->print_cr(" @ bci:%d", bci);
 540                this->print_codes();
 541                assert(false, "this call site should not be polymorphic");
 542              }
 543 #endif
 544              result._morphism = morphism;
 545            }
 546         }
 547         // Make the count consistent if this is a call profile. If count is
 548         // zero or less, presume that this is a typecheck profile and
 549         // do nothing.  Otherwise, increase count to be the sum of all
 550         // receiver's counts.
 551         if (count >= 0) {
 552           count += receivers_count_total;
 553         }
 554       }
 555       result._count = count;
 556     }
 557   }
 558   return result;
 559 }
 560 
 561 // ------------------------------------------------------------------
 562 // Add new receiver and sort data by receiver's profile count.
 563 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 564   // Add new receiver and sort data by receiver's counts when we have space
 565   // for it otherwise replace the less called receiver (less called receiver
 566   // is placed to the last array element which is not used).
 567   // First array's element contains most called receiver.
 568   int i = _limit;
 569   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 570     _receiver[i] = _receiver[i-1];
 571     _receiver_count[i] = _receiver_count[i-1];
 572   }
 573   _receiver[i] = receiver;
 574   _receiver_count[i] = receiver_count;
 575   if (_limit < MorphismLimit) _limit++;
 576 }
 577 
 578 
 579 void ciMethod::assert_virtual_call_type_ok(int bci) {
 580   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
 581          java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 582 }
 583 
 584 void ciMethod::assert_call_type_ok(int bci) {
 585   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
 586          java_code_at_bci(bci) == Bytecodes::_invokespecial ||
 587          java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 588 }
 589 
 590 /**
 591  * Check whether profiling provides a type for the argument i to the
 592  * call at bci bci
 593  *
 594  * @param [in]bci         bci of the call
 595  * @param [in]i           argument number
 596  * @param [out]type       profiled type of argument, NULL if none
 597  * @param [out]maybe_null true if null was seen for argument
 598  * @return                true if profiling exists
 599  *
 600  */
 601 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) {
 602   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 603     ciProfileData* data = method_data()->bci_to_data(bci);
 604     if (data != NULL) {
 605       if (data->is_VirtualCallTypeData()) {
 606         assert_virtual_call_type_ok(bci);
 607         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 608         if (i >= call->number_of_arguments()) {
 609           return false;
 610         }
 611         type = call->valid_argument_type(i);
 612         maybe_null = call->argument_maybe_null(i);
 613         return true;
 614       } else if (data->is_CallTypeData()) {
 615         assert_call_type_ok(bci);
 616         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 617         if (i >= call->number_of_arguments()) {
 618           return false;
 619         }
 620         type = call->valid_argument_type(i);
 621         maybe_null = call->argument_maybe_null(i);
 622         return true;
 623       }
 624     }
 625   }
 626   return false;
 627 }
 628 
 629 /**
 630  * Check whether profiling provides a type for the return value from
 631  * the call at bci bci
 632  *
 633  * @param [in]bci         bci of the call
 634  * @param [out]type       profiled type of argument, NULL if none
 635  * @param [out]maybe_null true if null was seen for argument
 636  * @return                true if profiling exists
 637  *
 638  */
 639 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) {
 640   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
 641     ciProfileData* data = method_data()->bci_to_data(bci);
 642     if (data != NULL) {
 643       if (data->is_VirtualCallTypeData()) {
 644         assert_virtual_call_type_ok(bci);
 645         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 646         type = call->valid_return_type();
 647         maybe_null = call->return_maybe_null();
 648         return true;
 649       } else if (data->is_CallTypeData()) {
 650         assert_call_type_ok(bci);
 651         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 652         type = call->valid_return_type();
 653         maybe_null = call->return_maybe_null();
 654         return true;
 655       }
 656     }
 657   }
 658   return false;
 659 }
 660 
 661 /**
 662  * Check whether profiling provides a type for the parameter i
 663  *
 664  * @param [in]i           parameter number
 665  * @param [out]type       profiled type of parameter, NULL if none
 666  * @param [out]maybe_null true if null was seen for parameter
 667  * @return                true if profiling exists
 668  *
 669  */
 670 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) {
 671   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 672     ciParametersTypeData* parameters = method_data()->parameters_type_data();
 673     if (parameters != NULL && i < parameters->number_of_parameters()) {
 674       type = parameters->valid_parameter_type(i);
 675       maybe_null = parameters->parameter_maybe_null(i);
 676       return true;
 677     }
 678   }
 679   return false;
 680 }
 681 
 682 
 683 // ------------------------------------------------------------------
 684 // ciMethod::find_monomorphic_target
 685 //
 686 // Given a certain calling environment, find the monomorphic target
 687 // for the call.  Return NULL if the call is not monomorphic in
 688 // its calling environment, or if there are only abstract methods.
 689 // The returned method is never abstract.
 690 // Note: If caller uses a non-null result, it must inform dependencies
 691 // via assert_unique_concrete_method or assert_leaf_type.
 692 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 693                                             ciInstanceKlass* callee_holder,
 694                                             ciInstanceKlass* actual_recv,
 695                                             bool check_access) {
 696   check_is_loaded();
 697 
 698   if (actual_recv->is_interface()) {
 699     // %%% We cannot trust interface types, yet.  See bug 6312651.
 700     return NULL;
 701   }
 702 
 703   ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);
 704   if (root_m == NULL) {
 705     // Something went wrong looking up the actual receiver method.
 706     return NULL;
 707   }
 708   assert(!root_m->is_abstract(), "resolve_invoke promise");
 709 
 710   // Make certain quick checks even if UseCHA is false.
 711 
 712   // Is it private or final?
 713   if (root_m->can_be_statically_bound()) {
 714     return root_m;
 715   }
 716 
 717   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
 718     // Easy case.  There is no other place to put a method, so don't bother
 719     // to go through the VM_ENTRY_MARK and all the rest.
 720     return root_m;
 721   }
 722 
 723   // Array methods (clone, hashCode, etc.) are always statically bound.
 724   // If we were to see an array type here, we'd return root_m.
 725   // However, this method processes only ciInstanceKlasses.  (See 4962591.)
 726   // The inline_native_clone intrinsic narrows Object to T[] properly,
 727   // so there is no need to do the same job here.
 728 
 729   if (!UseCHA)  return NULL;
 730 
 731   VM_ENTRY_MARK;
 732 
 733   // Disable CHA for default methods for now
 734   if (root_m->get_Method()->is_default_method()) {
 735     return NULL;
 736   }
 737 
 738   methodHandle target;
 739   {
 740     MutexLocker locker(Compile_lock);
 741     Klass* context = actual_recv->get_Klass();
 742     target = Dependencies::find_unique_concrete_method(context,
 743                                                        root_m->get_Method());
 744     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
 745   }
 746 
 747 #ifndef PRODUCT
 748   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
 749     tty->print("found a non-root unique target method");
 750     tty->print_cr("  context = %s", actual_recv->get_Klass()->external_name());
 751     tty->print("  method  = ");
 752     target->print_short_name(tty);
 753     tty->cr();
 754   }
 755 #endif //PRODUCT
 756 
 757   if (target() == NULL) {
 758     return NULL;
 759   }
 760   if (target() == root_m->get_Method()) {
 761     return root_m;
 762   }
 763   if (!root_m->is_public() &&
 764       !root_m->is_protected()) {
 765     // If we are going to reason about inheritance, it's easiest
 766     // if the method in question is public, protected, or private.
 767     // If the answer is not root_m, it is conservatively correct
 768     // to return NULL, even if the CHA encountered irrelevant
 769     // methods in other packages.
 770     // %%% TO DO: Work out logic for package-private methods
 771     // with the same name but different vtable indexes.
 772     return NULL;
 773   }
 774   return CURRENT_THREAD_ENV->get_method(target());
 775 }
 776 
 777 // ------------------------------------------------------------------
 778 // ciMethod::resolve_invoke
 779 //
 780 // Given a known receiver klass, find the target for the call.
 781 // Return NULL if the call has no target or the target is abstract.
 782 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {
 783    check_is_loaded();
 784    VM_ENTRY_MARK;
 785 
 786    KlassHandle caller_klass (THREAD, caller->get_Klass());
 787    KlassHandle h_recv       (THREAD, exact_receiver->get_Klass());
 788    KlassHandle h_resolved   (THREAD, holder()->get_Klass());
 789    Symbol* h_name      = name()->get_symbol();
 790    Symbol* h_signature = signature()->get_symbol();
 791 
 792    LinkInfo link_info(h_resolved, h_name, h_signature, caller_klass, check_access);
 793    methodHandle m;
 794    // Only do exact lookup if receiver klass has been linked.  Otherwise,
 795    // the vtable has not been setup, and the LinkResolver will fail.
 796    if (h_recv->is_array_klass()
 797         ||
 798        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
 799      if (holder()->is_interface()) {
 800        m = LinkResolver::resolve_interface_call_or_null(h_recv, link_info);
 801      } else {
 802        m = LinkResolver::resolve_virtual_call_or_null(h_recv, link_info);
 803      }
 804    }
 805 
 806    if (m.is_null()) {
 807      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 808      return NULL;
 809    }
 810 
 811    ciMethod* result = this;
 812    if (m() != get_Method()) {
 813      result = CURRENT_THREAD_ENV->get_method(m());
 814    }
 815 
 816    // Don't return abstract methods because they aren't
 817    // optimizable or interesting.
 818    if (result->is_abstract()) {
 819      return NULL;
 820    } else {
 821      return result;
 822    }
 823 }
 824 
 825 // ------------------------------------------------------------------
 826 // ciMethod::resolve_vtable_index
 827 //
 828 // Given a known receiver klass, find the vtable index for the call.
 829 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 830 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 831    check_is_loaded();
 832 
 833    int vtable_index = Method::invalid_vtable_index;
 834    // Only do lookup if receiver klass has been linked.  Otherwise,
 835    // the vtable has not been setup, and the LinkResolver will fail.
 836    if (!receiver->is_interface()
 837        && (!receiver->is_instance_klass() ||
 838            receiver->as_instance_klass()->is_linked())) {
 839      VM_ENTRY_MARK;
 840 
 841      KlassHandle caller_klass (THREAD, caller->get_Klass());
 842      KlassHandle h_recv       (THREAD, receiver->get_Klass());
 843      Symbol* h_name = name()->get_symbol();
 844      Symbol* h_signature = signature()->get_symbol();
 845 
 846      LinkInfo link_info(h_recv, h_name, h_signature, caller_klass);
 847      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, link_info);
 848      if (vtable_index == Method::nonvirtual_vtable_index) {
 849        // A statically bound method.  Return "no such index".
 850        vtable_index = Method::invalid_vtable_index;
 851      }
 852    }
 853 
 854    return vtable_index;
 855 }
 856 
 857 // ------------------------------------------------------------------
 858 // ciMethod::interpreter_call_site_count
 859 int ciMethod::interpreter_call_site_count(int bci) {
 860   if (method_data() != NULL) {
 861     ResourceMark rm;
 862     ciProfileData* data = method_data()->bci_to_data(bci);
 863     if (data != NULL && data->is_CounterData()) {
 864       return scale_count(data->as_CounterData()->count());
 865     }
 866   }
 867   return -1;  // unknown
 868 }
 869 
 870 // ------------------------------------------------------------------
 871 // ciMethod::get_field_at_bci
 872 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 873   ciBytecodeStream iter(this);
 874   iter.reset_to_bci(bci);
 875   iter.next();
 876   return iter.get_field(will_link);
 877 }
 878 
 879 // ------------------------------------------------------------------
 880 // ciMethod::get_method_at_bci
 881 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 882   ciBytecodeStream iter(this);
 883   iter.reset_to_bci(bci);
 884   iter.next();
 885   return iter.get_method(will_link, declared_signature);
 886 }
 887 
 888 // ------------------------------------------------------------------
 889 // Adjust a CounterData count to be commensurate with
 890 // interpreter_invocation_count.  If the MDO exists for
 891 // only 25% of the time the method exists, then the
 892 // counts in the MDO should be scaled by 4X, so that
 893 // they can be usefully and stably compared against the
 894 // invocation counts in methods.
 895 int ciMethod::scale_count(int count, float prof_factor) {
 896   if (count > 0 && method_data() != NULL) {
 897     int counter_life;
 898     int method_life = interpreter_invocation_count();
 899     if (TieredCompilation) {
 900       // In tiered the MDO's life is measured directly, so just use the snapshotted counters
 901       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
 902     } else {
 903       int current_mileage = method_data()->current_mileage();
 904       int creation_mileage = method_data()->creation_mileage();
 905       counter_life = current_mileage - creation_mileage;
 906     }
 907 
 908     // counter_life due to backedge_counter could be > method_life
 909     if (counter_life > method_life)
 910       counter_life = method_life;
 911     if (0 < counter_life && counter_life <= method_life) {
 912       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 913       count = (count > 0) ? count : 1;
 914     }
 915   }
 916   return count;
 917 }
 918 
 919 
 920 // ------------------------------------------------------------------
 921 // ciMethod::is_special_get_caller_class_method
 922 //
 923 bool ciMethod::is_ignored_by_security_stack_walk() const {
 924   check_is_loaded();
 925   VM_ENTRY_MARK;
 926   return get_Method()->is_ignored_by_security_stack_walk();
 927 }
 928 
 929 
 930 // ------------------------------------------------------------------
 931 // invokedynamic support
 932 
 933 // ------------------------------------------------------------------
 934 // ciMethod::is_method_handle_intrinsic
 935 //
 936 // Return true if the method is an instance of the JVM-generated
 937 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 938 bool ciMethod::is_method_handle_intrinsic() const {
 939   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 940   return (MethodHandles::is_signature_polymorphic(iid) &&
 941           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 942 }
 943 
 944 // ------------------------------------------------------------------
 945 // ciMethod::is_compiled_lambda_form
 946 //
 947 // Return true if the method is a generated MethodHandle adapter.
 948 // These are built by Java code.
 949 bool ciMethod::is_compiled_lambda_form() const {
 950   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 951   return iid == vmIntrinsics::_compiledLambdaForm;
 952 }
 953 
 954 // ------------------------------------------------------------------
 955 // ciMethod::has_member_arg
 956 //
 957 // Return true if the method is a linker intrinsic like _linkToVirtual.
 958 // These are built by the JVM.
 959 bool ciMethod::has_member_arg() const {
 960   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 961   return (MethodHandles::is_signature_polymorphic(iid) &&
 962           MethodHandles::has_member_arg(iid));
 963 }
 964 
 965 // ------------------------------------------------------------------
 966 // ciMethod::ensure_method_data
 967 //
 968 // Generate new MethodData* objects at compile time.
 969 // Return true if allocation was successful or no MDO is required.
 970 bool ciMethod::ensure_method_data(methodHandle h_m) {
 971   EXCEPTION_CONTEXT;
 972   if (is_native() || is_abstract() || h_m()->is_accessor()) {
 973     return true;
 974   }
 975   if (h_m()->method_data() == NULL) {
 976     Method::build_interpreter_method_data(h_m, THREAD);
 977     if (HAS_PENDING_EXCEPTION) {
 978       CLEAR_PENDING_EXCEPTION;
 979     }
 980   }
 981   if (h_m()->method_data() != NULL) {
 982     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 983     _method_data->load_data();
 984     return true;
 985   } else {
 986     _method_data = CURRENT_ENV->get_empty_methodData();
 987     return false;
 988   }
 989 }
 990 
 991 // public, retroactive version
 992 bool ciMethod::ensure_method_data() {
 993   bool result = true;
 994   if (_method_data == NULL || _method_data->is_empty()) {
 995     GUARDED_VM_ENTRY({
 996       result = ensure_method_data(get_Method());
 997     });
 998   }
 999   return result;
1000 }
1001 
1002 
1003 // ------------------------------------------------------------------
1004 // ciMethod::method_data
1005 //
1006 ciMethodData* ciMethod::method_data() {
1007   if (_method_data != NULL) {
1008     return _method_data;
1009   }
1010   VM_ENTRY_MARK;
1011   ciEnv* env = CURRENT_ENV;
1012   Thread* my_thread = JavaThread::current();
1013   methodHandle h_m(my_thread, get_Method());
1014 
1015   if (h_m()->method_data() != NULL) {
1016     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1017     _method_data->load_data();
1018   } else {
1019     _method_data = CURRENT_ENV->get_empty_methodData();
1020   }
1021   return _method_data;
1022 
1023 }
1024 
1025 // ------------------------------------------------------------------
1026 // ciMethod::method_data_or_null
1027 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1028 // NULL otherwise.
1029 ciMethodData* ciMethod::method_data_or_null() {
1030   ciMethodData *md = method_data();
1031   if (md->is_empty()) {
1032     return NULL;
1033   }
1034   return md;
1035 }
1036 
1037 // ------------------------------------------------------------------
1038 // ciMethod::ensure_method_counters
1039 //
1040 MethodCounters* ciMethod::ensure_method_counters() {
1041   check_is_loaded();
1042   VM_ENTRY_MARK;
1043   methodHandle mh(THREAD, get_Method());
1044   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1045   return method_counters;
1046 }
1047 
1048 // ------------------------------------------------------------------
1049 // ciMethod::has_option
1050 //
1051 bool ciMethod::has_option(const char* option) {
1052   check_is_loaded();
1053   VM_ENTRY_MARK;
1054   methodHandle mh(THREAD, get_Method());
1055   return CompilerOracle::has_option_string(mh, option);
1056 }
1057 
1058 // ------------------------------------------------------------------
1059 // ciMethod::has_option_value
1060 //
1061 bool ciMethod::has_option_value(const char* option, double& value) {
1062   check_is_loaded();
1063   VM_ENTRY_MARK;
1064   methodHandle mh(THREAD, get_Method());
1065   return CompilerOracle::has_option_value(mh, option, value);
1066 }
1067 // ------------------------------------------------------------------
1068 // ciMethod::can_be_compiled
1069 //
1070 // Have previous compilations of this method succeeded?
1071 bool ciMethod::can_be_compiled() {
1072   check_is_loaded();
1073   ciEnv* env = CURRENT_ENV;
1074   if (is_c1_compile(env->comp_level())) {
1075     return _is_c1_compilable;
1076   }
1077   return _is_c2_compilable;
1078 }
1079 
1080 // ------------------------------------------------------------------
1081 // ciMethod::set_not_compilable
1082 //
1083 // Tell the VM that this method cannot be compiled at all.
1084 void ciMethod::set_not_compilable(const char* reason) {
1085   check_is_loaded();
1086   VM_ENTRY_MARK;
1087   ciEnv* env = CURRENT_ENV;
1088   if (is_c1_compile(env->comp_level())) {
1089     _is_c1_compilable = false;
1090   } else {
1091     _is_c2_compilable = false;
1092   }
1093   get_Method()->set_not_compilable(env->comp_level(), true, reason);
1094 }
1095 
1096 // ------------------------------------------------------------------
1097 // ciMethod::can_be_osr_compiled
1098 //
1099 // Have previous compilations of this method succeeded?
1100 //
1101 // Implementation note: the VM does not currently keep track
1102 // of failed OSR compilations per bci.  The entry_bci parameter
1103 // is currently unused.
1104 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1105   check_is_loaded();
1106   VM_ENTRY_MARK;
1107   ciEnv* env = CURRENT_ENV;
1108   return !get_Method()->is_not_osr_compilable(env->comp_level());
1109 }
1110 
1111 // ------------------------------------------------------------------
1112 // ciMethod::has_compiled_code
1113 bool ciMethod::has_compiled_code() {
1114   return instructions_size() > 0;
1115 }
1116 
1117 int ciMethod::comp_level() {
1118   check_is_loaded();
1119   VM_ENTRY_MARK;
1120   CompiledMethod* nm = get_Method()->code();
1121   if (nm != NULL) return nm->comp_level();
1122   return 0;
1123 }
1124 
1125 int ciMethod::highest_osr_comp_level() {
1126   check_is_loaded();
1127   VM_ENTRY_MARK;
1128   return get_Method()->highest_osr_comp_level();
1129 }
1130 
1131 // ------------------------------------------------------------------
1132 // ciMethod::code_size_for_inlining
1133 //
1134 // Code size for inlining decisions.  This method returns a code
1135 // size of 1 for methods which has the ForceInline annotation.
1136 int ciMethod::code_size_for_inlining() {
1137   check_is_loaded();
1138   if (get_Method()->force_inline()) {
1139     return 1;
1140   }
1141   return code_size();
1142 }
1143 
1144 // ------------------------------------------------------------------
1145 // ciMethod::instructions_size
1146 //
1147 // This is a rough metric for "fat" methods, compared before inlining
1148 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1149 // junk like exception handler, stubs, and constant table, which are
1150 // not highly relevant to an inlined method.  So we use the more
1151 // specific accessor nmethod::insts_size.
1152 int ciMethod::instructions_size() {
1153   if (_instructions_size == -1) {
1154     GUARDED_VM_ENTRY(
1155                      CompiledMethod* code = get_Method()->code();
1156                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1157                        _instructions_size = code->insts_end() - code->verified_entry_point();
1158                      } else {
1159                        _instructions_size = 0;
1160                      }
1161                      );
1162   }
1163   return _instructions_size;
1164 }
1165 
1166 // ------------------------------------------------------------------
1167 // ciMethod::log_nmethod_identity
1168 void ciMethod::log_nmethod_identity(xmlStream* log) {
1169   GUARDED_VM_ENTRY(
1170     CompiledMethod* code = get_Method()->code();
1171     if (code != NULL) {
1172       code->log_identity(log);
1173     }
1174   )
1175 }
1176 
1177 // ------------------------------------------------------------------
1178 // ciMethod::is_not_reached
1179 bool ciMethod::is_not_reached(int bci) {
1180   check_is_loaded();
1181   VM_ENTRY_MARK;
1182   return Interpreter::is_not_reached(
1183                methodHandle(THREAD, get_Method()), bci);
1184 }
1185 
1186 // ------------------------------------------------------------------
1187 // ciMethod::was_never_executed
1188 bool ciMethod::was_executed_more_than(int times) {
1189   VM_ENTRY_MARK;
1190   return get_Method()->was_executed_more_than(times);
1191 }
1192 
1193 // ------------------------------------------------------------------
1194 // ciMethod::has_unloaded_classes_in_signature
1195 bool ciMethod::has_unloaded_classes_in_signature() {
1196   VM_ENTRY_MARK;
1197   {
1198     EXCEPTION_MARK;
1199     methodHandle m(THREAD, get_Method());
1200     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1201     if( HAS_PENDING_EXCEPTION ) {
1202       CLEAR_PENDING_EXCEPTION;
1203       return true;     // Declare that we may have unloaded classes
1204     }
1205     return has_unloaded;
1206   }
1207 }
1208 
1209 // ------------------------------------------------------------------
1210 // ciMethod::is_klass_loaded
1211 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1212   VM_ENTRY_MARK;
1213   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1214 }
1215 
1216 // ------------------------------------------------------------------
1217 // ciMethod::check_call
1218 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1219   // This method is used only in C2 from InlineTree::ok_to_inline,
1220   // and is only used under -Xcomp or -XX:CompileTheWorld.
1221   // It appears to fail when applied to an invokeinterface call site.
1222   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1223   VM_ENTRY_MARK;
1224   {
1225     EXCEPTION_MARK;
1226     HandleMark hm(THREAD);
1227     constantPoolHandle pool (THREAD, get_Method()->constants());
1228     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1229     methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1230     if (HAS_PENDING_EXCEPTION) {
1231       CLEAR_PENDING_EXCEPTION;
1232       return false;
1233     } else {
1234       return (spec_method->is_static() == is_static);
1235     }
1236   }
1237   return false;
1238 }
1239 
1240 // ------------------------------------------------------------------
1241 // ciMethod::profile_aging
1242 //
1243 // Should the method be compiled with an age counter?
1244 bool ciMethod::profile_aging() const {
1245   return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) &&
1246                           !MethodCounters::is_nmethod_age_unset(nmethod_age()));
1247 }
1248 // ------------------------------------------------------------------
1249 // ciMethod::print_codes
1250 //
1251 // Print the bytecodes for this method.
1252 void ciMethod::print_codes_on(outputStream* st) {
1253   check_is_loaded();
1254   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1255 }
1256 
1257 
1258 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1259   check_is_loaded(); \
1260   VM_ENTRY_MARK; \
1261   return get_Method()->flag_accessor(); \
1262 }
1263 
1264 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1265 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1266 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1267 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1268 bool ciMethod::is_getter      () const {         FETCH_FLAG_FROM_VM(is_getter); }
1269 bool ciMethod::is_setter      () const {         FETCH_FLAG_FROM_VM(is_setter); }
1270 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1271 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }
1272 
1273 bool ciMethod::is_boxing_method() const {
1274   if (holder()->is_box_klass()) {
1275     switch (intrinsic_id()) {
1276       case vmIntrinsics::_Boolean_valueOf:
1277       case vmIntrinsics::_Byte_valueOf:
1278       case vmIntrinsics::_Character_valueOf:
1279       case vmIntrinsics::_Short_valueOf:
1280       case vmIntrinsics::_Integer_valueOf:
1281       case vmIntrinsics::_Long_valueOf:
1282       case vmIntrinsics::_Float_valueOf:
1283       case vmIntrinsics::_Double_valueOf:
1284         return true;
1285       default:
1286         return false;
1287     }
1288   }
1289   return false;
1290 }
1291 
1292 bool ciMethod::is_unboxing_method() const {
1293   if (holder()->is_box_klass()) {
1294     switch (intrinsic_id()) {
1295       case vmIntrinsics::_booleanValue:
1296       case vmIntrinsics::_byteValue:
1297       case vmIntrinsics::_charValue:
1298       case vmIntrinsics::_shortValue:
1299       case vmIntrinsics::_intValue:
1300       case vmIntrinsics::_longValue:
1301       case vmIntrinsics::_floatValue:
1302       case vmIntrinsics::_doubleValue:
1303         return true;
1304       default:
1305         return false;
1306     }
1307   }
1308   return false;
1309 }
1310 
1311 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1312 #ifdef COMPILER2
1313   if (_bcea == NULL) {
1314     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1315   }
1316   return _bcea;
1317 #else // COMPILER2
1318   ShouldNotReachHere();
1319   return NULL;
1320 #endif // COMPILER2
1321 }
1322 
1323 ciMethodBlocks  *ciMethod::get_method_blocks() {
1324   Arena *arena = CURRENT_ENV->arena();
1325   if (_method_blocks == NULL) {
1326     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1327   }
1328   return _method_blocks;
1329 }
1330 
1331 #undef FETCH_FLAG_FROM_VM
1332 
1333 void ciMethod::dump_name_as_ascii(outputStream* st) {
1334   Method* method = get_Method();
1335   st->print("%s %s %s",
1336             method->klass_name()->as_quoted_ascii(),
1337             method->name()->as_quoted_ascii(),
1338             method->signature()->as_quoted_ascii());
1339 }
1340 
1341 void ciMethod::dump_replay_data(outputStream* st) {
1342   ResourceMark rm;
1343   Method* method = get_Method();
1344   MethodCounters* mcs = method->method_counters();
1345   st->print("ciMethod ");
1346   dump_name_as_ascii(st);
1347   st->print_cr(" %d %d %d %d %d",
1348                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1349                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1350                interpreter_invocation_count(),
1351                interpreter_throwout_count(),
1352                _instructions_size);
1353 }
1354 
1355 // ------------------------------------------------------------------
1356 // ciMethod::print_codes
1357 //
1358 // Print a range of the bytecodes for this method.
1359 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1360   check_is_loaded();
1361   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1362 }
1363 
1364 // ------------------------------------------------------------------
1365 // ciMethod::print_name
1366 //
1367 // Print the name of this method, including signature and some flags.
1368 void ciMethod::print_name(outputStream* st) {
1369   check_is_loaded();
1370   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1371 }
1372 
1373 // ------------------------------------------------------------------
1374 // ciMethod::print_short_name
1375 //
1376 // Print the name of this method, without signature.
1377 void ciMethod::print_short_name(outputStream* st) {
1378   if (is_loaded()) {
1379     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1380   } else {
1381     // Fall back if method is not loaded.
1382     holder()->print_name_on(st);
1383     st->print("::");
1384     name()->print_symbol_on(st);
1385     if (WizardMode)
1386       signature()->as_symbol()->print_symbol_on(st);
1387   }
1388 }
1389 
1390 // ------------------------------------------------------------------
1391 // ciMethod::print_impl
1392 //
1393 // Implementation of the print method.
1394 void ciMethod::print_impl(outputStream* st) {
1395   ciMetadata::print_impl(st);
1396   st->print(" name=");
1397   name()->print_symbol_on(st);
1398   st->print(" holder=");
1399   holder()->print_name_on(st);
1400   st->print(" signature=");
1401   signature()->as_symbol()->print_symbol_on(st);
1402   if (is_loaded()) {
1403     st->print(" loaded=true");
1404     st->print(" arg_size=%d", arg_size());
1405     st->print(" flags=");
1406     flags().print_member_flags(st);
1407   } else {
1408     st->print(" loaded=false");
1409   }
1410 }
1411 
1412 #if INCLUDE_TRACE
1413 TraceStructCiMethod ciMethod::to_trace_struct() const {
1414   TraceStructCiMethod result;
1415   result.set_class(holder()->name()->as_utf8());
1416   result.set_name(name()->as_utf8());
1417   result.set_signature(signature()->as_symbol()->as_utf8());
1418   return result;
1419 }
1420 #endif