1 /*
   2  * Copyright (c) 1999, 2019, 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 #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   // These fields are always filled in in loaded methods.
  78   _flags = ciFlags(h_m()->access_flags());
  79 
  80   // Easy to compute, so fill them in now.
  81   _max_stack          = h_m()->max_stack();
  82   _max_locals         = h_m()->max_locals();
  83   _code_size          = h_m()->code_size();
  84   _intrinsic_id       = h_m()->intrinsic_id();
  85   _handler_count      = h_m()->exception_table_length();
  86   _size_of_parameters = h_m()->size_of_parameters();
  87   _uses_monitors      = h_m()->access_flags().has_monitor_bytecodes();
  88   _balanced_monitors  = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
  89   _is_c1_compilable   = !h_m()->is_not_c1_compilable();
  90   _is_c2_compilable   = !h_m()->is_not_c2_compilable();
  91   // Lazy fields, filled in on demand.  Require allocation.
  92   _code               = NULL;
  93   _exception_handlers = NULL;
  94   _liveness           = NULL;
  95   _method_blocks = NULL;
  96 #if defined(COMPILER2) || defined(SHARK)
  97   _flow               = NULL;
  98   _bcea               = NULL;
  99 #endif // COMPILER2 || SHARK
 100 
 101   ciEnv *env = CURRENT_ENV;
 102   if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
 103     // 6328518 check hotswap conditions under the right lock.
 104     MutexLocker locker(Compile_lock);
 105     if (Dependencies::check_evol_method(h_m()) != NULL) {
 106       _is_c1_compilable = false;
 107       _is_c2_compilable = false;
 108     }
 109   } else {
 110     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
 111   }
 112 
 113   if (h_m()->method_holder()->is_linked()) {
 114     _can_be_statically_bound = h_m()->can_be_statically_bound();
 115   } else {
 116     // Have to use a conservative value in this case.
 117     _can_be_statically_bound = false;
 118   }
 119 
 120   // Adjust the definition of this condition to be more useful:
 121   // %%% take these conditions into account in vtable generation
 122   if (!_can_be_statically_bound && h_m()->is_private())
 123     _can_be_statically_bound = true;
 124   if (_can_be_statically_bound && h_m()->is_abstract())
 125     _can_be_statically_bound = false;
 126 
 127   // generating _signature may allow GC and therefore move m.
 128   // These fields are always filled in.
 129   _name = env->get_symbol(h_m()->name());
 130   ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
 131   constantPoolHandle cpool = h_m()->constants();
 132   _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
 133   _method_data = NULL;
 134   // Take a snapshot of these values, so they will be commensurate with the MDO.
 135   if (ProfileInterpreter || TieredCompilation) {
 136     int invcnt = h_m()->interpreter_invocation_count();
 137     // if the value overflowed report it as max int
 138     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
 139     _interpreter_throwout_count   = h_m()->interpreter_throwout_count();
 140   } else {
 141     _interpreter_invocation_count = 0;
 142     _interpreter_throwout_count = 0;
 143   }
 144   if (_interpreter_invocation_count == 0)
 145     _interpreter_invocation_count = 1;
 146   _instructions_size = -1;
 147 #ifdef ASSERT
 148   if (ReplayCompiles) {
 149     ciReplay::initialize(this);
 150   }
 151 #endif
 152 }
 153 
 154 
 155 // ------------------------------------------------------------------
 156 // ciMethod::ciMethod
 157 //
 158 // Unloaded method.
 159 ciMethod::ciMethod(ciInstanceKlass* holder,
 160                    ciSymbol*        name,
 161                    ciSymbol*        signature,
 162                    ciInstanceKlass* accessor) :
 163   ciMetadata((Metadata*)NULL),
 164   _name(                   name),
 165   _holder(                 holder),
 166   _intrinsic_id(           vmIntrinsics::_none),
 167   _liveness(               NULL),
 168   _can_be_statically_bound(false),
 169   _method_blocks(          NULL),
 170   _method_data(            NULL)
 171 #if defined(COMPILER2) || defined(SHARK)
 172   ,
 173   _flow(                   NULL),
 174   _bcea(                   NULL),
 175   _instructions_size(-1)
 176 #endif // COMPILER2 || SHARK
 177 {
 178   // Usually holder and accessor are the same type but in some cases
 179   // the holder has the wrong class loader (e.g. invokedynamic call
 180   // sites) so we pass the accessor.
 181   _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
 182 }
 183 
 184 
 185 // ------------------------------------------------------------------
 186 // ciMethod::load_code
 187 //
 188 // Load the bytecodes and exception handler table for this method.
 189 void ciMethod::load_code() {
 190   VM_ENTRY_MARK;
 191   assert(is_loaded(), "only loaded methods have code");
 192 
 193   Method* me = get_Method();
 194   Arena* arena = CURRENT_THREAD_ENV->arena();
 195 
 196   // Load the bytecodes.
 197   _code = (address)arena->Amalloc(code_size());
 198   memcpy(_code, me->code_base(), code_size());
 199 
 200   // Revert any breakpoint bytecodes in ci's copy
 201   if (me->number_of_breakpoints() > 0) {
 202     BreakpointInfo* bp = me->method_holder()->breakpoints();
 203     for (; bp != NULL; bp = bp->next()) {
 204       if (bp->match(me)) {
 205         code_at_put(bp->bci(), bp->orig_bytecode());
 206       }
 207     }
 208   }
 209 
 210   // And load the exception table.
 211   ExceptionTable exc_table(me);
 212 
 213   // Allocate one extra spot in our list of exceptions.  This
 214   // last entry will be used to represent the possibility that
 215   // an exception escapes the method.  See ciExceptionHandlerStream
 216   // for details.
 217   _exception_handlers =
 218     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
 219                                          * (_handler_count + 1));
 220   if (_handler_count > 0) {
 221     for (int i=0; i<_handler_count; i++) {
 222       _exception_handlers[i] = new (arena) ciExceptionHandler(
 223                                 holder(),
 224             /* start    */      exc_table.start_pc(i),
 225             /* limit    */      exc_table.end_pc(i),
 226             /* goto pc  */      exc_table.handler_pc(i),
 227             /* cp index */      exc_table.catch_type_index(i));
 228     }
 229   }
 230 
 231   // Put an entry at the end of our list to represent the possibility
 232   // of exceptional exit.
 233   _exception_handlers[_handler_count] =
 234     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
 235 
 236   if (CIPrintMethodCodes) {
 237     print_codes();
 238   }
 239 }
 240 
 241 
 242 // ------------------------------------------------------------------
 243 // ciMethod::has_linenumber_table
 244 //
 245 // length unknown until decompression
 246 bool    ciMethod::has_linenumber_table() const {
 247   check_is_loaded();
 248   VM_ENTRY_MARK;
 249   return get_Method()->has_linenumber_table();
 250 }
 251 
 252 
 253 // ------------------------------------------------------------------
 254 // ciMethod::compressed_linenumber_table
 255 u_char* ciMethod::compressed_linenumber_table() const {
 256   check_is_loaded();
 257   VM_ENTRY_MARK;
 258   return get_Method()->compressed_linenumber_table();
 259 }
 260 
 261 
 262 // ------------------------------------------------------------------
 263 // ciMethod::line_number_from_bci
 264 int ciMethod::line_number_from_bci(int bci) const {
 265   check_is_loaded();
 266   VM_ENTRY_MARK;
 267   return get_Method()->line_number_from_bci(bci);
 268 }
 269 
 270 
 271 // ------------------------------------------------------------------
 272 // ciMethod::vtable_index
 273 //
 274 // Get the position of this method's entry in the vtable, if any.
 275 int ciMethod::vtable_index() {
 276   check_is_loaded();
 277   assert(holder()->is_linked(), "must be linked");
 278   VM_ENTRY_MARK;
 279   return get_Method()->vtable_index();
 280 }
 281 
 282 
 283 #ifdef SHARK
 284 // ------------------------------------------------------------------
 285 // ciMethod::itable_index
 286 //
 287 // Get the position of this method's entry in the itable, if any.
 288 int ciMethod::itable_index() {
 289   check_is_loaded();
 290   assert(holder()->is_linked(), "must be linked");
 291   VM_ENTRY_MARK;
 292   Method* m = get_Method();
 293   if (!m->has_itable_index())
 294     return Method::nonvirtual_vtable_index;
 295   return m->itable_index();
 296 }
 297 #endif // SHARK
 298 
 299 
 300 // ------------------------------------------------------------------
 301 // ciMethod::native_entry
 302 //
 303 // Get the address of this method's native code, if any.
 304 address ciMethod::native_entry() {
 305   check_is_loaded();
 306   assert(flags().is_native(), "must be native method");
 307   VM_ENTRY_MARK;
 308   Method* method = get_Method();
 309   address entry = method->native_function();
 310   assert(entry != NULL, "must be valid entry point");
 311   return entry;
 312 }
 313 
 314 
 315 // ------------------------------------------------------------------
 316 // ciMethod::interpreter_entry
 317 //
 318 // Get the entry point for running this method in the interpreter.
 319 address ciMethod::interpreter_entry() {
 320   check_is_loaded();
 321   VM_ENTRY_MARK;
 322   methodHandle mh(THREAD, get_Method());
 323   return Interpreter::entry_for_method(mh);
 324 }
 325 
 326 
 327 // ------------------------------------------------------------------
 328 // ciMethod::uses_balanced_monitors
 329 //
 330 // Does this method use monitors in a strict stack-disciplined manner?
 331 bool ciMethod::has_balanced_monitors() {
 332   check_is_loaded();
 333   if (_balanced_monitors) return true;
 334 
 335   // Analyze the method to see if monitors are used properly.
 336   VM_ENTRY_MARK;
 337   methodHandle method(THREAD, get_Method());
 338   assert(method->has_monitor_bytecodes(), "should have checked this");
 339 
 340   // Check to see if a previous compilation computed the
 341   // monitor-matching analysis.
 342   if (method->guaranteed_monitor_matching()) {
 343     _balanced_monitors = true;
 344     return true;
 345   }
 346 
 347   {
 348     EXCEPTION_MARK;
 349     ResourceMark rm(THREAD);
 350     GeneratePairingInfo gpi(method);
 351     gpi.compute_map(CATCH);
 352     if (!gpi.monitor_safe()) {
 353       return false;
 354     }
 355     method->set_guaranteed_monitor_matching();
 356     _balanced_monitors = true;
 357   }
 358   return true;
 359 }
 360 
 361 
 362 // ------------------------------------------------------------------
 363 // ciMethod::get_flow_analysis
 364 ciTypeFlow* ciMethod::get_flow_analysis() {
 365 #if defined(COMPILER2) || defined(SHARK)
 366   if (_flow == NULL) {
 367     ciEnv* env = CURRENT_ENV;
 368     _flow = new (env->arena()) ciTypeFlow(env, this);
 369     _flow->do_flow();
 370   }
 371   return _flow;
 372 #else // COMPILER2 || SHARK
 373   ShouldNotReachHere();
 374   return NULL;
 375 #endif // COMPILER2 || SHARK
 376 }
 377 
 378 
 379 // ------------------------------------------------------------------
 380 // ciMethod::get_osr_flow_analysis
 381 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 382 #if defined(COMPILER2) || defined(SHARK)
 383   // OSR entry points are always place after a call bytecode of some sort
 384   assert(osr_bci >= 0, "must supply valid OSR entry point");
 385   ciEnv* env = CURRENT_ENV;
 386   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 387   flow->do_flow();
 388   return flow;
 389 #else // COMPILER2 || SHARK
 390   ShouldNotReachHere();
 391   return NULL;
 392 #endif // COMPILER2 || SHARK
 393 }
 394 
 395 // ------------------------------------------------------------------
 396 // ciMethod::raw_liveness_at_bci
 397 //
 398 // Which local variables are live at a specific bci?
 399 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 400   check_is_loaded();
 401   if (_liveness == NULL) {
 402     // Create the liveness analyzer.
 403     Arena* arena = CURRENT_ENV->arena();
 404     _liveness = new (arena) MethodLiveness(arena, this);
 405     _liveness->compute_liveness();
 406   }
 407   return _liveness->get_liveness_at(bci);
 408 }
 409 
 410 // ------------------------------------------------------------------
 411 // ciMethod::liveness_at_bci
 412 //
 413 // Which local variables are live at a specific bci?  When debugging
 414 // will return true for all locals in some cases to improve debug
 415 // information.
 416 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 417   MethodLivenessResult result = raw_liveness_at_bci(bci);
 418   if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
 419     // Keep all locals live for the user's edification and amusement.
 420     result.at_put_range(0, result.size(), true);
 421   }
 422   return result;
 423 }
 424 
 425 // ciMethod::live_local_oops_at_bci
 426 //
 427 // find all the live oops in the locals array for a particular bci
 428 // Compute what the interpreter believes by using the interpreter
 429 // oopmap generator. This is used as a double check during osr to
 430 // guard against conservative result from MethodLiveness making us
 431 // think a dead oop is live.  MethodLiveness is conservative in the
 432 // sense that it may consider locals to be live which cannot be live,
 433 // like in the case where a local could contain an oop or  a primitive
 434 // along different paths.  In that case the local must be dead when
 435 // those paths merge. Since the interpreter's viewpoint is used when
 436 // gc'ing an interpreter frame we need to use its viewpoint  during
 437 // OSR when loading the locals.
 438 
 439 BitMap ciMethod::live_local_oops_at_bci(int bci) {
 440   VM_ENTRY_MARK;
 441   InterpreterOopMap mask;
 442   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
 443   int mask_size = max_locals();
 444   BitMap result(mask_size);
 445   result.clear();
 446   int i;
 447   for (i = 0; i < mask_size ; i++ ) {
 448     if (mask.is_oop(i)) result.set_bit(i);
 449   }
 450   return result;
 451 }
 452 
 453 
 454 #ifdef COMPILER1
 455 // ------------------------------------------------------------------
 456 // ciMethod::bci_block_start
 457 //
 458 // Marks all bcis where a new basic block starts
 459 const BitMap ciMethod::bci_block_start() {
 460   check_is_loaded();
 461   if (_liveness == NULL) {
 462     // Create the liveness analyzer.
 463     Arena* arena = CURRENT_ENV->arena();
 464     _liveness = new (arena) MethodLiveness(arena, this);
 465     _liveness->compute_liveness();
 466   }
 467 
 468   return _liveness->get_bci_block_start();
 469 }
 470 #endif // COMPILER1
 471 
 472 
 473 // ------------------------------------------------------------------
 474 // ciMethod::call_profile_at_bci
 475 //
 476 // Get the ciCallProfile for the invocation of this method.
 477 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 478 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 479   ResourceMark rm;
 480   ciCallProfile result;
 481   if (method_data() != NULL && method_data()->is_mature()) {
 482     ciProfileData* data = method_data()->bci_to_data(bci);
 483     if (data != NULL && data->is_CounterData()) {
 484       // Every profiled call site has a counter.
 485       int count = data->as_CounterData()->count();
 486 
 487       if (!data->is_ReceiverTypeData()) {
 488         result._receiver_count[0] = 0;  // that's a definite zero
 489       } else { // ReceiverTypeData is a subclass of CounterData
 490         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 491         // In addition, virtual call sites have receiver type information
 492         int receivers_count_total = 0;
 493         int morphism = 0;
 494         // Precompute morphism for the possible fixup
 495         for (uint i = 0; i < call->row_limit(); i++) {
 496           ciKlass* receiver = call->receiver(i);
 497           if (receiver == NULL)  continue;
 498           morphism++;
 499         }
 500         int epsilon = 0;
 501         if (TieredCompilation && ProfileInterpreter) {
 502           // Interpreter and C1 treat final and special invokes differently.
 503           // C1 will record a type, whereas the interpreter will just
 504           // increment the count. Detect this case.
 505           if (morphism == 1 && count > 0) {
 506             epsilon = count;
 507             count = 0;
 508           }
 509         }
 510         for (uint i = 0; i < call->row_limit(); i++) {
 511           ciKlass* receiver = call->receiver(i);
 512           if (receiver == NULL)  continue;
 513           int rcount = call->receiver_count(i) + epsilon;
 514           if (rcount == 0) rcount = 1; // Should be valid value
 515           receivers_count_total += rcount;
 516           // Add the receiver to result data.
 517           result.add_receiver(receiver, rcount);
 518           // If we extend profiling to record methods,
 519           // we will set result._method also.
 520         }
 521         // Determine call site's morphism.
 522         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
 523         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
 524         // The call site count is > 0 in the case of a polymorphic virtual call.
 525         if (morphism > 0 && morphism == result._limit) {
 526            // The morphism <= MorphismLimit.
 527            if ((morphism <  ciCallProfile::MorphismLimit) ||
 528                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 529 #ifdef ASSERT
 530              if (count > 0) {
 531                this->print_short_name(tty);
 532                tty->print_cr(" @ bci:%d", bci);
 533                this->print_codes();
 534                assert(false, "this call site should not be polymorphic");
 535              }
 536 #endif
 537              result._morphism = morphism;
 538            }
 539         }
 540         // Make the count consistent if this is a call profile. If count is
 541         // zero or less, presume that this is a typecheck profile and
 542         // do nothing.  Otherwise, increase count to be the sum of all
 543         // receiver's counts.
 544         if (count >= 0) {
 545           count += receivers_count_total;
 546         }
 547       }
 548       result._count = count;
 549     }
 550   }
 551   return result;
 552 }
 553 
 554 // ------------------------------------------------------------------
 555 // Add new receiver and sort data by receiver's profile count.
 556 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 557   // Add new receiver and sort data by receiver's counts when we have space
 558   // for it otherwise replace the less called receiver (less called receiver
 559   // is placed to the last array element which is not used).
 560   // First array's element contains most called receiver.
 561   int i = _limit;
 562   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 563     _receiver[i] = _receiver[i-1];
 564     _receiver_count[i] = _receiver_count[i-1];
 565   }
 566   _receiver[i] = receiver;
 567   _receiver_count[i] = receiver_count;
 568   if (_limit < MorphismLimit) _limit++;
 569 }
 570 
 571 
 572 void ciMethod::assert_virtual_call_type_ok(int bci) {
 573   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
 574          java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
 575 }
 576 
 577 void ciMethod::assert_call_type_ok(int bci) {
 578   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
 579          java_code_at_bci(bci) == Bytecodes::_invokespecial ||
 580          java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
 581 }
 582 
 583 /**
 584  * Check whether profiling provides a type for the argument i to the
 585  * call at bci bci
 586  *
 587  * @param bci  bci of the call
 588  * @param i    argument number
 589  * @return     profiled type
 590  *
 591  * If the profile reports that the argument may be null, return false
 592  * at least for now.
 593  */
 594 ciKlass* ciMethod::argument_profiled_type(int bci, int i) {
 595   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 596     ciProfileData* data = method_data()->bci_to_data(bci);
 597     if (data != NULL) {
 598       if (data->is_VirtualCallTypeData()) {
 599         assert_virtual_call_type_ok(bci);
 600         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 601         if (i >= call->number_of_arguments()) {
 602           return NULL;
 603         }
 604         ciKlass* type = call->valid_argument_type(i);
 605         if (type != NULL && !call->argument_maybe_null(i)) {
 606           return type;
 607         }
 608       } else if (data->is_CallTypeData()) {
 609         assert_call_type_ok(bci);
 610         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 611         if (i >= call->number_of_arguments()) {
 612           return NULL;
 613         }
 614         ciKlass* type = call->valid_argument_type(i);
 615         if (type != NULL && !call->argument_maybe_null(i)) {
 616           return type;
 617         }
 618       }
 619     }
 620   }
 621   return NULL;
 622 }
 623 
 624 /**
 625  * Check whether profiling provides a type for the return value from
 626  * the call at bci bci
 627  *
 628  * @param bci  bci of the call
 629  * @return     profiled type
 630  *
 631  * If the profile reports that the argument may be null, return false
 632  * at least for now.
 633  */
 634 ciKlass* ciMethod::return_profiled_type(int bci) {
 635   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
 636     ciProfileData* data = method_data()->bci_to_data(bci);
 637     if (data != NULL) {
 638       if (data->is_VirtualCallTypeData()) {
 639         assert_virtual_call_type_ok(bci);
 640         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 641         ciKlass* type = call->valid_return_type();
 642         if (type != NULL && !call->return_maybe_null()) {
 643           return type;
 644         }
 645       } else if (data->is_CallTypeData()) {
 646         assert_call_type_ok(bci);
 647         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 648         ciKlass* type = call->valid_return_type();
 649         if (type != NULL && !call->return_maybe_null()) {
 650           return type;
 651         }
 652       }
 653     }
 654   }
 655   return NULL;
 656 }
 657 
 658 /**
 659  * Check whether profiling provides a type for the parameter i
 660  *
 661  * @param i    parameter number
 662  * @return     profiled type
 663  *
 664  * If the profile reports that the argument may be null, return false
 665  * at least for now.
 666  */
 667 ciKlass* ciMethod::parameter_profiled_type(int i) {
 668   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 669     ciParametersTypeData* parameters = method_data()->parameters_type_data();
 670     if (parameters != NULL && i < parameters->number_of_parameters()) {
 671       ciKlass* type = parameters->valid_parameter_type(i);
 672       if (type != NULL && !parameters->parameter_maybe_null(i)) {
 673         return type;
 674       }
 675     }
 676   }
 677   return NULL;
 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    methodHandle m;
 791    // Only do exact lookup if receiver klass has been linked.  Otherwise,
 792    // the vtable has not been setup, and the LinkResolver will fail.
 793    if (h_recv->oop_is_array()
 794         ||
 795        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
 796      if (holder()->is_interface()) {
 797        m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access);
 798      } else {
 799        m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access);
 800      }
 801    }
 802 
 803    if (m.is_null()) {
 804      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 805      return NULL;
 806    }
 807 
 808    ciMethod* result = this;
 809    if (m() != get_Method()) {
 810      result = CURRENT_THREAD_ENV->get_method(m());
 811    }
 812 
 813    // Don't return abstract methods because they aren't
 814    // optimizable or interesting.
 815    if (result->is_abstract()) {
 816      return NULL;
 817    } else {
 818      return result;
 819    }
 820 }
 821 
 822 // ------------------------------------------------------------------
 823 // ciMethod::resolve_vtable_index
 824 //
 825 // Given a known receiver klass, find the vtable index for the call.
 826 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 827 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 828    check_is_loaded();
 829 
 830    int vtable_index = Method::invalid_vtable_index;
 831    // Only do lookup if receiver klass has been linked.  Otherwise,
 832    // the vtable has not been setup, and the LinkResolver will fail.
 833    if (!receiver->is_interface()
 834        && (!receiver->is_instance_klass() ||
 835            receiver->as_instance_klass()->is_linked())) {
 836      VM_ENTRY_MARK;
 837 
 838      KlassHandle caller_klass (THREAD, caller->get_Klass());
 839      KlassHandle h_recv       (THREAD, receiver->get_Klass());
 840      Symbol* h_name = name()->get_symbol();
 841      Symbol* h_signature = signature()->get_symbol();
 842 
 843      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
 844      if (vtable_index == Method::nonvirtual_vtable_index) {
 845        // A statically bound method.  Return "no such index".
 846        vtable_index = Method::invalid_vtable_index;
 847      }
 848    }
 849 
 850    return vtable_index;
 851 }
 852 
 853 // ------------------------------------------------------------------
 854 // ciMethod::interpreter_call_site_count
 855 int ciMethod::interpreter_call_site_count(int bci) {
 856   if (method_data() != NULL) {
 857     ResourceMark rm;
 858     ciProfileData* data = method_data()->bci_to_data(bci);
 859     if (data != NULL && data->is_CounterData()) {
 860       return scale_count(data->as_CounterData()->count());
 861     }
 862   }
 863   return -1;  // unknown
 864 }
 865 
 866 // ------------------------------------------------------------------
 867 // ciMethod::get_field_at_bci
 868 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 869   ciBytecodeStream iter(this);
 870   iter.reset_to_bci(bci);
 871   iter.next();
 872   return iter.get_field(will_link);
 873 }
 874 
 875 // ------------------------------------------------------------------
 876 // ciMethod::get_method_at_bci
 877 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 878   ciBytecodeStream iter(this);
 879   iter.reset_to_bci(bci);
 880   iter.next();
 881   return iter.get_method(will_link, declared_signature);
 882 }
 883 
 884 // ------------------------------------------------------------------
 885 // Adjust a CounterData count to be commensurate with
 886 // interpreter_invocation_count.  If the MDO exists for
 887 // only 25% of the time the method exists, then the
 888 // counts in the MDO should be scaled by 4X, so that
 889 // they can be usefully and stably compared against the
 890 // invocation counts in methods.
 891 int ciMethod::scale_count(int count, float prof_factor) {
 892   if (count > 0 && method_data() != NULL) {
 893     int counter_life;
 894     int method_life = interpreter_invocation_count();
 895     if (TieredCompilation) {
 896       // In tiered the MDO's life is measured directly, so just use the snapshotted counters
 897       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
 898     } else {
 899       int current_mileage = method_data()->current_mileage();
 900       int creation_mileage = method_data()->creation_mileage();
 901       counter_life = current_mileage - creation_mileage;
 902     }
 903 
 904     // counter_life due to backedge_counter could be > method_life
 905     if (counter_life > method_life)
 906       counter_life = method_life;
 907     if (0 < counter_life && counter_life <= method_life) {
 908       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 909       count = (count > 0) ? count : 1;
 910     }
 911   }
 912   return count;
 913 }
 914 
 915 
 916 // ------------------------------------------------------------------
 917 // ciMethod::is_special_get_caller_class_method
 918 //
 919 bool ciMethod::is_ignored_by_security_stack_walk() const {
 920   check_is_loaded();
 921   VM_ENTRY_MARK;
 922   return get_Method()->is_ignored_by_security_stack_walk();
 923 }
 924 
 925 
 926 // ------------------------------------------------------------------
 927 // invokedynamic support
 928 
 929 // ------------------------------------------------------------------
 930 // ciMethod::is_method_handle_intrinsic
 931 //
 932 // Return true if the method is an instance of the JVM-generated
 933 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 934 bool ciMethod::is_method_handle_intrinsic() const {
 935   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 936   return (MethodHandles::is_signature_polymorphic(iid) &&
 937           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 938 }
 939 
 940 // ------------------------------------------------------------------
 941 // ciMethod::is_compiled_lambda_form
 942 //
 943 // Return true if the method is a generated MethodHandle adapter.
 944 // These are built by Java code.
 945 bool ciMethod::is_compiled_lambda_form() const {
 946   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 947   return iid == vmIntrinsics::_compiledLambdaForm;
 948 }
 949 
 950 // ------------------------------------------------------------------
 951 // ciMethod::is_object_initializer
 952 //
 953 bool ciMethod::is_object_initializer() const {
 954    return name() == ciSymbol::object_initializer_name();
 955 }
 956 
 957 // ------------------------------------------------------------------
 958 // ciMethod::has_member_arg
 959 //
 960 // Return true if the method is a linker intrinsic like _linkToVirtual.
 961 // These are built by the JVM.
 962 bool ciMethod::has_member_arg() const {
 963   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 964   return (MethodHandles::is_signature_polymorphic(iid) &&
 965           MethodHandles::has_member_arg(iid));
 966 }
 967 
 968 // ------------------------------------------------------------------
 969 // ciMethod::ensure_method_data
 970 //
 971 // Generate new MethodData* objects at compile time.
 972 // Return true if allocation was successful or no MDO is required.
 973 bool ciMethod::ensure_method_data(methodHandle h_m) {
 974   EXCEPTION_CONTEXT;
 975   if (is_native() || is_abstract() || h_m()->is_accessor()) {
 976     return true;
 977   }
 978   if (h_m()->method_data() == NULL) {
 979     Method::build_interpreter_method_data(h_m, THREAD);
 980     if (HAS_PENDING_EXCEPTION) {
 981       CLEAR_PENDING_EXCEPTION;
 982     }
 983   }
 984   if (h_m()->method_data() != NULL) {
 985     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 986     _method_data->load_data();
 987     return true;
 988   } else {
 989     _method_data = CURRENT_ENV->get_empty_methodData();
 990     return false;
 991   }
 992 }
 993 
 994 // public, retroactive version
 995 bool ciMethod::ensure_method_data() {
 996   bool result = true;
 997   if (_method_data == NULL || _method_data->is_empty()) {
 998     GUARDED_VM_ENTRY({
 999       result = ensure_method_data(get_Method());
1000     });
1001   }
1002   return result;
1003 }
1004 
1005 
1006 // ------------------------------------------------------------------
1007 // ciMethod::method_data
1008 //
1009 ciMethodData* ciMethod::method_data() {
1010   if (_method_data != NULL) {
1011     return _method_data;
1012   }
1013   VM_ENTRY_MARK;
1014   ciEnv* env = CURRENT_ENV;
1015   Thread* my_thread = JavaThread::current();
1016   methodHandle h_m(my_thread, get_Method());
1017 
1018   if (h_m()->method_data() != NULL) {
1019     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1020     _method_data->load_data();
1021   } else {
1022     _method_data = CURRENT_ENV->get_empty_methodData();
1023   }
1024   return _method_data;
1025 
1026 }
1027 
1028 // ------------------------------------------------------------------
1029 // ciMethod::method_data_or_null
1030 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1031 // NULL otherwise.
1032 ciMethodData* ciMethod::method_data_or_null() {
1033   ciMethodData *md = method_data();
1034   if (md->is_empty()) {
1035     return NULL;
1036   }
1037   return md;
1038 }
1039 
1040 // ------------------------------------------------------------------
1041 // ciMethod::ensure_method_counters
1042 //
1043 MethodCounters* ciMethod::ensure_method_counters() {
1044   check_is_loaded();
1045   VM_ENTRY_MARK;
1046   methodHandle mh(THREAD, get_Method());
1047   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1048   return method_counters;
1049 }
1050 
1051 // ------------------------------------------------------------------
1052 // ciMethod::should_exclude
1053 //
1054 // Should this method be excluded from compilation?
1055 bool ciMethod::should_exclude() {
1056   check_is_loaded();
1057   VM_ENTRY_MARK;
1058   methodHandle mh(THREAD, get_Method());
1059   bool ignore;
1060   return CompilerOracle::should_exclude(mh, ignore);
1061 }
1062 
1063 // ------------------------------------------------------------------
1064 // ciMethod::should_inline
1065 //
1066 // Should this method be inlined during compilation?
1067 bool ciMethod::should_inline() {
1068   check_is_loaded();
1069   VM_ENTRY_MARK;
1070   methodHandle mh(THREAD, get_Method());
1071   return CompilerOracle::should_inline(mh);
1072 }
1073 
1074 // ------------------------------------------------------------------
1075 // ciMethod::should_not_inline
1076 //
1077 // Should this method be disallowed from inlining during compilation?
1078 bool ciMethod::should_not_inline() {
1079   check_is_loaded();
1080   VM_ENTRY_MARK;
1081   methodHandle mh(THREAD, get_Method());
1082   return CompilerOracle::should_not_inline(mh);
1083 }
1084 
1085 // ------------------------------------------------------------------
1086 // ciMethod::should_print_assembly
1087 //
1088 // Should the compiler print the generated code for this method?
1089 bool ciMethod::should_print_assembly() {
1090   check_is_loaded();
1091   VM_ENTRY_MARK;
1092   methodHandle mh(THREAD, get_Method());
1093   return CompilerOracle::should_print(mh);
1094 }
1095 
1096 // ------------------------------------------------------------------
1097 // ciMethod::break_at_execute
1098 //
1099 // Should the compiler insert a breakpoint into the generated code
1100 // method?
1101 bool ciMethod::break_at_execute() {
1102   check_is_loaded();
1103   VM_ENTRY_MARK;
1104   methodHandle mh(THREAD, get_Method());
1105   return CompilerOracle::should_break_at(mh);
1106 }
1107 
1108 // ------------------------------------------------------------------
1109 // ciMethod::has_option
1110 //
1111 bool ciMethod::has_option(const char* option) {
1112   check_is_loaded();
1113   VM_ENTRY_MARK;
1114   methodHandle mh(THREAD, get_Method());
1115   return CompilerOracle::has_option_string(mh, option);
1116 }
1117 
1118 // ------------------------------------------------------------------
1119 // ciMethod::has_option_value
1120 //
1121 template<typename T>
1122 bool ciMethod::has_option_value(const char* option, T& value) {
1123   check_is_loaded();
1124   VM_ENTRY_MARK;
1125   methodHandle mh(THREAD, get_Method());
1126   return CompilerOracle::has_option_value(mh, option, value);
1127 }
1128 // Explicit instantiation for all OptionTypes supported.
1129 template bool ciMethod::has_option_value<intx>(const char* option, intx& value);
1130 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value);
1131 template bool ciMethod::has_option_value<bool>(const char* option, bool& value);
1132 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value);
1133 
1134 // ------------------------------------------------------------------
1135 // ciMethod::can_be_compiled
1136 //
1137 // Have previous compilations of this method succeeded?
1138 bool ciMethod::can_be_compiled() {
1139   check_is_loaded();
1140   ciEnv* env = CURRENT_ENV;
1141   if (is_c1_compile(env->comp_level())) {
1142     return _is_c1_compilable;
1143   }
1144   return _is_c2_compilable;
1145 }
1146 
1147 // ------------------------------------------------------------------
1148 // ciMethod::set_not_compilable
1149 //
1150 // Tell the VM that this method cannot be compiled at all.
1151 void ciMethod::set_not_compilable(const char* reason) {
1152   check_is_loaded();
1153   VM_ENTRY_MARK;
1154   ciEnv* env = CURRENT_ENV;
1155   if (is_c1_compile(env->comp_level())) {
1156     _is_c1_compilable = false;
1157   } else {
1158     _is_c2_compilable = false;
1159   }
1160   get_Method()->set_not_compilable(env->comp_level(), true, reason);
1161 }
1162 
1163 // ------------------------------------------------------------------
1164 // ciMethod::can_be_osr_compiled
1165 //
1166 // Have previous compilations of this method succeeded?
1167 //
1168 // Implementation note: the VM does not currently keep track
1169 // of failed OSR compilations per bci.  The entry_bci parameter
1170 // is currently unused.
1171 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1172   check_is_loaded();
1173   VM_ENTRY_MARK;
1174   ciEnv* env = CURRENT_ENV;
1175   return !get_Method()->is_not_osr_compilable(env->comp_level());
1176 }
1177 
1178 // ------------------------------------------------------------------
1179 // ciMethod::has_compiled_code
1180 bool ciMethod::has_compiled_code() {
1181   return instructions_size() > 0;
1182 }
1183 
1184 int ciMethod::comp_level() {
1185   check_is_loaded();
1186   VM_ENTRY_MARK;
1187   nmethod* nm = get_Method()->code();
1188   if (nm != NULL) return nm->comp_level();
1189   return 0;
1190 }
1191 
1192 int ciMethod::highest_osr_comp_level() {
1193   check_is_loaded();
1194   VM_ENTRY_MARK;
1195   return get_Method()->highest_osr_comp_level();
1196 }
1197 
1198 // ------------------------------------------------------------------
1199 // ciMethod::code_size_for_inlining
1200 //
1201 // Code size for inlining decisions.  This method returns a code
1202 // size of 1 for methods which has the ForceInline annotation.
1203 int ciMethod::code_size_for_inlining() {
1204   check_is_loaded();
1205   if (get_Method()->force_inline()) {
1206     return 1;
1207   }
1208   return code_size();
1209 }
1210 
1211 // ------------------------------------------------------------------
1212 // ciMethod::instructions_size
1213 //
1214 // This is a rough metric for "fat" methods, compared before inlining
1215 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1216 // junk like exception handler, stubs, and constant table, which are
1217 // not highly relevant to an inlined method.  So we use the more
1218 // specific accessor nmethod::insts_size.
1219 int ciMethod::instructions_size() {
1220   if (_instructions_size == -1) {
1221     GUARDED_VM_ENTRY(
1222                      nmethod* code = get_Method()->code();
1223                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1224                        _instructions_size = code->insts_end() - code->verified_entry_point();
1225                      } else {
1226                        _instructions_size = 0;
1227                      }
1228                      );
1229   }
1230   return _instructions_size;
1231 }
1232 
1233 // ------------------------------------------------------------------
1234 // ciMethod::log_nmethod_identity
1235 void ciMethod::log_nmethod_identity(xmlStream* log) {
1236   GUARDED_VM_ENTRY(
1237     nmethod* code = get_Method()->code();
1238     if (code != NULL) {
1239       code->log_identity(log);
1240     }
1241   )
1242 }
1243 
1244 // ------------------------------------------------------------------
1245 // ciMethod::is_not_reached
1246 bool ciMethod::is_not_reached(int bci) {
1247   check_is_loaded();
1248   VM_ENTRY_MARK;
1249   return Interpreter::is_not_reached(
1250                methodHandle(THREAD, get_Method()), bci);
1251 }
1252 
1253 // ------------------------------------------------------------------
1254 // ciMethod::was_never_executed
1255 bool ciMethod::was_executed_more_than(int times) {
1256   VM_ENTRY_MARK;
1257   return get_Method()->was_executed_more_than(times);
1258 }
1259 
1260 // ------------------------------------------------------------------
1261 // ciMethod::has_unloaded_classes_in_signature
1262 bool ciMethod::has_unloaded_classes_in_signature() {
1263   VM_ENTRY_MARK;
1264   {
1265     EXCEPTION_MARK;
1266     methodHandle m(THREAD, get_Method());
1267     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1268     if( HAS_PENDING_EXCEPTION ) {
1269       CLEAR_PENDING_EXCEPTION;
1270       return true;     // Declare that we may have unloaded classes
1271     }
1272     return has_unloaded;
1273   }
1274 }
1275 
1276 // ------------------------------------------------------------------
1277 // ciMethod::is_klass_loaded
1278 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1279   VM_ENTRY_MARK;
1280   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1281 }
1282 
1283 // ------------------------------------------------------------------
1284 // ciMethod::check_call
1285 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1286   // This method is used only in C2 from InlineTree::ok_to_inline,
1287   // and is only used under -Xcomp or -XX:CompileTheWorld.
1288   // It appears to fail when applied to an invokeinterface call site.
1289   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1290   VM_ENTRY_MARK;
1291   {
1292     EXCEPTION_MARK;
1293     HandleMark hm(THREAD);
1294     constantPoolHandle pool (THREAD, get_Method()->constants());
1295     methodHandle spec_method;
1296     KlassHandle  spec_klass;
1297     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1298     LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
1299     if (HAS_PENDING_EXCEPTION) {
1300       CLEAR_PENDING_EXCEPTION;
1301       return false;
1302     } else {
1303       return (spec_method->is_static() == is_static);
1304     }
1305   }
1306   return false;
1307 }
1308 
1309 // ------------------------------------------------------------------
1310 // ciMethod::print_codes
1311 //
1312 // Print the bytecodes for this method.
1313 void ciMethod::print_codes_on(outputStream* st) {
1314   check_is_loaded();
1315   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1316 }
1317 
1318 
1319 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1320   check_is_loaded(); \
1321   VM_ENTRY_MARK; \
1322   return get_Method()->flag_accessor(); \
1323 }
1324 
1325 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1326 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1327 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1328 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1329 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1330 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }
1331 
1332 bool ciMethod::is_boxing_method() const {
1333   if (holder()->is_box_klass()) {
1334     switch (intrinsic_id()) {
1335       case vmIntrinsics::_Boolean_valueOf:
1336       case vmIntrinsics::_Byte_valueOf:
1337       case vmIntrinsics::_Character_valueOf:
1338       case vmIntrinsics::_Short_valueOf:
1339       case vmIntrinsics::_Integer_valueOf:
1340       case vmIntrinsics::_Long_valueOf:
1341       case vmIntrinsics::_Float_valueOf:
1342       case vmIntrinsics::_Double_valueOf:
1343         return true;
1344       default:
1345         return false;
1346     }
1347   }
1348   return false;
1349 }
1350 
1351 bool ciMethod::is_unboxing_method() const {
1352   if (holder()->is_box_klass()) {
1353     switch (intrinsic_id()) {
1354       case vmIntrinsics::_booleanValue:
1355       case vmIntrinsics::_byteValue:
1356       case vmIntrinsics::_charValue:
1357       case vmIntrinsics::_shortValue:
1358       case vmIntrinsics::_intValue:
1359       case vmIntrinsics::_longValue:
1360       case vmIntrinsics::_floatValue:
1361       case vmIntrinsics::_doubleValue:
1362         return true;
1363       default:
1364         return false;
1365     }
1366   }
1367   return false;
1368 }
1369 
1370 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1371 #ifdef COMPILER2
1372   if (_bcea == NULL) {
1373     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1374   }
1375   return _bcea;
1376 #else // COMPILER2
1377   ShouldNotReachHere();
1378   return NULL;
1379 #endif // COMPILER2
1380 }
1381 
1382 ciMethodBlocks  *ciMethod::get_method_blocks() {
1383   Arena *arena = CURRENT_ENV->arena();
1384   if (_method_blocks == NULL) {
1385     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1386   }
1387   return _method_blocks;
1388 }
1389 
1390 #undef FETCH_FLAG_FROM_VM
1391 
1392 void ciMethod::dump_name_as_ascii(outputStream* st) {
1393   Method* method = get_Method();
1394   st->print("%s %s %s",
1395             method->klass_name()->as_quoted_ascii(),
1396             method->name()->as_quoted_ascii(),
1397             method->signature()->as_quoted_ascii());
1398 }
1399 
1400 void ciMethod::dump_replay_data(outputStream* st) {
1401   ResourceMark rm;
1402   Method* method = get_Method();
1403   MethodCounters* mcs = method->method_counters();
1404   st->print("ciMethod ");
1405   dump_name_as_ascii(st);
1406   st->print_cr(" %d %d %d %d %d",
1407                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1408                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1409                interpreter_invocation_count(),
1410                interpreter_throwout_count(),
1411                _instructions_size);
1412 }
1413 
1414 // ------------------------------------------------------------------
1415 // ciMethod::print_codes
1416 //
1417 // Print a range of the bytecodes for this method.
1418 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1419   check_is_loaded();
1420   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1421 }
1422 
1423 // ------------------------------------------------------------------
1424 // ciMethod::print_name
1425 //
1426 // Print the name of this method, including signature and some flags.
1427 void ciMethod::print_name(outputStream* st) {
1428   check_is_loaded();
1429   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1430 }
1431 
1432 // ------------------------------------------------------------------
1433 // ciMethod::print_short_name
1434 //
1435 // Print the name of this method, without signature.
1436 void ciMethod::print_short_name(outputStream* st) {
1437   if (is_loaded()) {
1438     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1439   } else {
1440     // Fall back if method is not loaded.
1441     holder()->print_name_on(st);
1442     st->print("::");
1443     name()->print_symbol_on(st);
1444     if (WizardMode)
1445       signature()->as_symbol()->print_symbol_on(st);
1446   }
1447 }
1448 
1449 // ------------------------------------------------------------------
1450 // ciMethod::print_impl
1451 //
1452 // Implementation of the print method.
1453 void ciMethod::print_impl(outputStream* st) {
1454   ciMetadata::print_impl(st);
1455   st->print(" name=");
1456   name()->print_symbol_on(st);
1457   st->print(" holder=");
1458   holder()->print_name_on(st);
1459   st->print(" signature=");
1460   signature()->as_symbol()->print_symbol_on(st);
1461   if (is_loaded()) {
1462     st->print(" loaded=true");
1463     st->print(" arg_size=%d", arg_size());
1464     st->print(" flags=");
1465     flags().print_member_flags(st);
1466   } else {
1467     st->print(" loaded=false");
1468   }
1469 }
1470 
1471 #if INCLUDE_TRACE
1472 TraceStructCalleeMethod ciMethod::to_trace_struct() const {
1473   TraceStructCalleeMethod result;
1474   result.set_type(holder()->name()->as_utf8());
1475   result.set_name(name()->as_utf8());
1476   result.set_descriptor(signature()->as_symbol()->as_utf8());
1477   return result;
1478 }
1479 #endif