1 /*
   2  * Copyright (c) 1999, 2013, 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) : ciMetadata(h_m()) {
  72   assert(h_m() != NULL, "no null method");
  73 
  74   // These fields are always filled in in loaded methods.
  75   _flags = ciFlags(h_m()->access_flags());
  76 
  77   // Easy to compute, so fill them in now.
  78   _max_stack          = h_m()->max_stack();
  79   _max_locals         = h_m()->max_locals();
  80   _code_size          = h_m()->code_size();
  81   _intrinsic_id       = h_m()->intrinsic_id();
  82   _handler_count      = h_m()->exception_table_length();
  83   _uses_monitors      = h_m()->access_flags().has_monitor_bytecodes();
  84   _balanced_monitors  = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
  85   _is_c1_compilable   = !h_m()->is_not_c1_compilable();
  86   _is_c2_compilable   = !h_m()->is_not_c2_compilable();
  87   // Lazy fields, filled in on demand.  Require allocation.
  88   _code               = NULL;
  89   _exception_handlers = NULL;
  90   _liveness           = NULL;
  91   _method_blocks = NULL;
  92 #if defined(COMPILER2) || defined(SHARK)
  93   _flow               = NULL;
  94   _bcea               = NULL;
  95 #endif // COMPILER2 || SHARK
  96 
  97   ciEnv *env = CURRENT_ENV;
  98   if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {
  99     // 6328518 check hotswap conditions under the right lock.
 100     MutexLocker locker(Compile_lock);
 101     if (Dependencies::check_evol_method(h_m()) != NULL) {
 102       _is_c1_compilable = false;
 103       _is_c2_compilable = false;
 104     }
 105   } else {
 106     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
 107   }
 108 
 109   if (h_m()->method_holder()->is_linked()) {
 110     _can_be_statically_bound = h_m()->can_be_statically_bound();
 111   } else {
 112     // Have to use a conservative value in this case.
 113     _can_be_statically_bound = false;
 114   }
 115 
 116   // Adjust the definition of this condition to be more useful:
 117   // %%% take these conditions into account in vtable generation
 118   if (!_can_be_statically_bound && h_m()->is_private())
 119     _can_be_statically_bound = true;
 120   if (_can_be_statically_bound && h_m()->is_abstract())
 121     _can_be_statically_bound = false;
 122 
 123   // generating _signature may allow GC and therefore move m.
 124   // These fields are always filled in.
 125   _name = env->get_symbol(h_m()->name());
 126   _holder = env->get_instance_klass(h_m()->method_holder());
 127   ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());
 128   constantPoolHandle cpool = h_m()->constants();
 129   _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
 130   _method_data = NULL;
 131   // Take a snapshot of these values, so they will be commensurate with the MDO.
 132   if (ProfileInterpreter || TieredCompilation) {
 133     int invcnt = h_m()->interpreter_invocation_count();
 134     // if the value overflowed report it as max int
 135     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
 136     _interpreter_throwout_count   = h_m()->interpreter_throwout_count();
 137   } else {
 138     _interpreter_invocation_count = 0;
 139     _interpreter_throwout_count = 0;
 140   }
 141   if (_interpreter_invocation_count == 0)
 142     _interpreter_invocation_count = 1;
 143   _instructions_size = -1;
 144 #ifdef ASSERT
 145   if (ReplayCompiles) {
 146     ciReplay::initialize(this);
 147   }
 148 #endif
 149 }
 150 
 151 
 152 // ------------------------------------------------------------------
 153 // ciMethod::ciMethod
 154 //
 155 // Unloaded method.
 156 ciMethod::ciMethod(ciInstanceKlass* holder,
 157                    ciSymbol*        name,
 158                    ciSymbol*        signature,
 159                    ciInstanceKlass* accessor) :
 160   ciMetadata((Metadata*)NULL),
 161   _name(                   name),
 162   _holder(                 holder),
 163   _intrinsic_id(           vmIntrinsics::_none),
 164   _liveness(               NULL),
 165   _can_be_statically_bound(false),
 166   _method_blocks(          NULL),
 167   _method_data(            NULL)
 168 #if defined(COMPILER2) || defined(SHARK)
 169   ,
 170   _flow(                   NULL),
 171   _bcea(                   NULL),
 172   _instructions_size(-1)
 173 #endif // COMPILER2 || SHARK
 174 {
 175   // Usually holder and accessor are the same type but in some cases
 176   // the holder has the wrong class loader (e.g. invokedynamic call
 177   // sites) so we pass the accessor.
 178   _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
 179 }
 180 
 181 
 182 // ------------------------------------------------------------------
 183 // ciMethod::load_code
 184 //
 185 // Load the bytecodes and exception handler table for this method.
 186 void ciMethod::load_code() {
 187   VM_ENTRY_MARK;
 188   assert(is_loaded(), "only loaded methods have code");
 189 
 190   Method* me = get_Method();
 191   Arena* arena = CURRENT_THREAD_ENV->arena();
 192 
 193   // Load the bytecodes.
 194   _code = (address)arena->Amalloc(code_size());
 195   memcpy(_code, me->code_base(), code_size());
 196 
 197   // Revert any breakpoint bytecodes in ci's copy
 198   if (me->number_of_breakpoints() > 0) {
 199     BreakpointInfo* bp = me->method_holder()->breakpoints();
 200     for (; bp != NULL; bp = bp->next()) {
 201       if (bp->match(me)) {
 202         code_at_put(bp->bci(), bp->orig_bytecode());
 203       }
 204     }
 205   }
 206 
 207   // And load the exception table.
 208   ExceptionTable exc_table(me);
 209 
 210   // Allocate one extra spot in our list of exceptions.  This
 211   // last entry will be used to represent the possibility that
 212   // an exception escapes the method.  See ciExceptionHandlerStream
 213   // for details.
 214   _exception_handlers =
 215     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
 216                                          * (_handler_count + 1));
 217   if (_handler_count > 0) {
 218     for (int i=0; i<_handler_count; i++) {
 219       _exception_handlers[i] = new (arena) ciExceptionHandler(
 220                                 holder(),
 221             /* start    */      exc_table.start_pc(i),
 222             /* limit    */      exc_table.end_pc(i),
 223             /* goto pc  */      exc_table.handler_pc(i),
 224             /* cp index */      exc_table.catch_type_index(i));
 225     }
 226   }
 227 
 228   // Put an entry at the end of our list to represent the possibility
 229   // of exceptional exit.
 230   _exception_handlers[_handler_count] =
 231     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
 232 
 233   if (CIPrintMethodCodes) {
 234     print_codes();
 235   }
 236 }
 237 
 238 
 239 // ------------------------------------------------------------------
 240 // ciMethod::has_linenumber_table
 241 //
 242 // length unknown until decompression
 243 bool    ciMethod::has_linenumber_table() const {
 244   check_is_loaded();
 245   VM_ENTRY_MARK;
 246   return get_Method()->has_linenumber_table();
 247 }
 248 
 249 
 250 // ------------------------------------------------------------------
 251 // ciMethod::compressed_linenumber_table
 252 u_char* ciMethod::compressed_linenumber_table() const {
 253   check_is_loaded();
 254   VM_ENTRY_MARK;
 255   return get_Method()->compressed_linenumber_table();
 256 }
 257 
 258 
 259 // ------------------------------------------------------------------
 260 // ciMethod::line_number_from_bci
 261 int ciMethod::line_number_from_bci(int bci) const {
 262   check_is_loaded();
 263   VM_ENTRY_MARK;
 264   return get_Method()->line_number_from_bci(bci);
 265 }
 266 
 267 
 268 // ------------------------------------------------------------------
 269 // ciMethod::vtable_index
 270 //
 271 // Get the position of this method's entry in the vtable, if any.
 272 int ciMethod::vtable_index() {
 273   check_is_loaded();
 274   assert(holder()->is_linked(), "must be linked");
 275   VM_ENTRY_MARK;
 276   return get_Method()->vtable_index();
 277 }
 278 
 279 
 280 #ifdef SHARK
 281 // ------------------------------------------------------------------
 282 // ciMethod::itable_index
 283 //
 284 // Get the position of this method's entry in the itable, if any.
 285 int ciMethod::itable_index() {
 286   check_is_loaded();
 287   assert(holder()->is_linked(), "must be linked");
 288   VM_ENTRY_MARK;
 289   Method* m = get_Method();
 290   if (!m->has_itable_index())
 291     return Method::nonvirtual_vtable_index;
 292   return m->itable_index();
 293 }
 294 #endif // SHARK
 295 
 296 
 297 // ------------------------------------------------------------------
 298 // ciMethod::native_entry
 299 //
 300 // Get the address of this method's native code, if any.
 301 address ciMethod::native_entry() {
 302   check_is_loaded();
 303   assert(flags().is_native(), "must be native method");
 304   VM_ENTRY_MARK;
 305   Method* method = get_Method();
 306   address entry = method->native_function();
 307   assert(entry != NULL, "must be valid entry point");
 308   return entry;
 309 }
 310 
 311 
 312 // ------------------------------------------------------------------
 313 // ciMethod::interpreter_entry
 314 //
 315 // Get the entry point for running this method in the interpreter.
 316 address ciMethod::interpreter_entry() {
 317   check_is_loaded();
 318   VM_ENTRY_MARK;
 319   methodHandle mh(THREAD, get_Method());
 320   return Interpreter::entry_for_method(mh);
 321 }
 322 
 323 
 324 // ------------------------------------------------------------------
 325 // ciMethod::uses_balanced_monitors
 326 //
 327 // Does this method use monitors in a strict stack-disciplined manner?
 328 bool ciMethod::has_balanced_monitors() {
 329   check_is_loaded();
 330   if (_balanced_monitors) return true;
 331 
 332   // Analyze the method to see if monitors are used properly.
 333   VM_ENTRY_MARK;
 334   methodHandle method(THREAD, get_Method());
 335   assert(method->has_monitor_bytecodes(), "should have checked this");
 336 
 337   // Check to see if a previous compilation computed the
 338   // monitor-matching analysis.
 339   if (method->guaranteed_monitor_matching()) {
 340     _balanced_monitors = true;
 341     return true;
 342   }
 343 
 344   {
 345     EXCEPTION_MARK;
 346     ResourceMark rm(THREAD);
 347     GeneratePairingInfo gpi(method);
 348     gpi.compute_map(CATCH);
 349     if (!gpi.monitor_safe()) {
 350       return false;
 351     }
 352     method->set_guaranteed_monitor_matching();
 353     _balanced_monitors = true;
 354   }
 355   return true;
 356 }
 357 
 358 
 359 // ------------------------------------------------------------------
 360 // ciMethod::get_flow_analysis
 361 ciTypeFlow* ciMethod::get_flow_analysis() {
 362 #if defined(COMPILER2) || defined(SHARK)
 363   if (_flow == NULL) {
 364     ciEnv* env = CURRENT_ENV;
 365     _flow = new (env->arena()) ciTypeFlow(env, this);
 366     _flow->do_flow();
 367   }
 368   return _flow;
 369 #else // COMPILER2 || SHARK
 370   ShouldNotReachHere();
 371   return NULL;
 372 #endif // COMPILER2 || SHARK
 373 }
 374 
 375 
 376 // ------------------------------------------------------------------
 377 // ciMethod::get_osr_flow_analysis
 378 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 379 #if defined(COMPILER2) || defined(SHARK)
 380   // OSR entry points are always place after a call bytecode of some sort
 381   assert(osr_bci >= 0, "must supply valid OSR entry point");
 382   ciEnv* env = CURRENT_ENV;
 383   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 384   flow->do_flow();
 385   return flow;
 386 #else // COMPILER2 || SHARK
 387   ShouldNotReachHere();
 388   return NULL;
 389 #endif // COMPILER2 || SHARK
 390 }
 391 
 392 // ------------------------------------------------------------------
 393 // ciMethod::raw_liveness_at_bci
 394 //
 395 // Which local variables are live at a specific bci?
 396 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 397   check_is_loaded();
 398   if (_liveness == NULL) {
 399     // Create the liveness analyzer.
 400     Arena* arena = CURRENT_ENV->arena();
 401     _liveness = new (arena) MethodLiveness(arena, this);
 402     _liveness->compute_liveness();
 403   }
 404   return _liveness->get_liveness_at(bci);
 405 }
 406 
 407 // ------------------------------------------------------------------
 408 // ciMethod::liveness_at_bci
 409 //
 410 // Which local variables are live at a specific bci?  When debugging
 411 // will return true for all locals in some cases to improve debug
 412 // information.
 413 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 414   MethodLivenessResult result = raw_liveness_at_bci(bci);
 415   if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) {
 416     // Keep all locals live for the user's edification and amusement.
 417     result.at_put_range(0, result.size(), true);
 418   }
 419   return result;
 420 }
 421 
 422 // ciMethod::live_local_oops_at_bci
 423 //
 424 // find all the live oops in the locals array for a particular bci
 425 // Compute what the interpreter believes by using the interpreter
 426 // oopmap generator. This is used as a double check during osr to
 427 // guard against conservative result from MethodLiveness making us
 428 // think a dead oop is live.  MethodLiveness is conservative in the
 429 // sense that it may consider locals to be live which cannot be live,
 430 // like in the case where a local could contain an oop or  a primitive
 431 // along different paths.  In that case the local must be dead when
 432 // those paths merge. Since the interpreter's viewpoint is used when
 433 // gc'ing an interpreter frame we need to use its viewpoint  during
 434 // OSR when loading the locals.
 435 
 436 BitMap ciMethod::live_local_oops_at_bci(int bci) {
 437   VM_ENTRY_MARK;
 438   InterpreterOopMap mask;
 439   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
 440   int mask_size = max_locals();
 441   BitMap result(mask_size);
 442   result.clear();
 443   int i;
 444   for (i = 0; i < mask_size ; i++ ) {
 445     if (mask.is_oop(i)) result.set_bit(i);
 446   }
 447   return result;
 448 }
 449 
 450 
 451 #ifdef COMPILER1
 452 // ------------------------------------------------------------------
 453 // ciMethod::bci_block_start
 454 //
 455 // Marks all bcis where a new basic block starts
 456 const BitMap ciMethod::bci_block_start() {
 457   check_is_loaded();
 458   if (_liveness == NULL) {
 459     // Create the liveness analyzer.
 460     Arena* arena = CURRENT_ENV->arena();
 461     _liveness = new (arena) MethodLiveness(arena, this);
 462     _liveness->compute_liveness();
 463   }
 464 
 465   return _liveness->get_bci_block_start();
 466 }
 467 #endif // COMPILER1
 468 
 469 
 470 // ------------------------------------------------------------------
 471 // ciMethod::call_profile_at_bci
 472 //
 473 // Get the ciCallProfile for the invocation of this method.
 474 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 475 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 476   ResourceMark rm;
 477   ciCallProfile result;
 478   if (method_data() != NULL && method_data()->is_mature()) {
 479     ciProfileData* data = method_data()->bci_to_data(bci);
 480     if (data != NULL && data->is_CounterData()) {
 481       // Every profiled call site has a counter.
 482       int count = data->as_CounterData()->count();
 483 
 484       if (!data->is_ReceiverTypeData()) {
 485         result._receiver_count[0] = 0;  // that's a definite zero
 486       } else { // ReceiverTypeData is a subclass of CounterData
 487         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 488         // In addition, virtual call sites have receiver type information
 489         int receivers_count_total = 0;
 490         int morphism = 0;
 491         // Precompute morphism for the possible fixup
 492         for (uint i = 0; i < call->row_limit(); i++) {
 493           ciKlass* receiver = call->receiver(i);
 494           if (receiver == NULL)  continue;
 495           morphism++;
 496         }
 497         int epsilon = 0;
 498         if (TieredCompilation && ProfileInterpreter) {
 499           // Interpreter and C1 treat final and special invokes differently.
 500           // C1 will record a type, whereas the interpreter will just
 501           // increment the count. Detect this case.
 502           if (morphism == 1 && count > 0) {
 503             epsilon = count;
 504             count = 0;
 505           }
 506         }
 507         for (uint i = 0; i < call->row_limit(); i++) {
 508           ciKlass* receiver = call->receiver(i);
 509           if (receiver == NULL)  continue;
 510           int rcount = call->receiver_count(i) + epsilon;
 511           if (rcount == 0) rcount = 1; // Should be valid value
 512           receivers_count_total += rcount;
 513           // Add the receiver to result data.
 514           result.add_receiver(receiver, rcount);
 515           // If we extend profiling to record methods,
 516           // we will set result._method also.
 517         }
 518         // Determine call site's morphism.
 519         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
 520         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
 521         // The call site count is > 0 in the case of a polymorphic virtual call.
 522         if (morphism > 0 && morphism == result._limit) {
 523            // The morphism <= MorphismLimit.
 524            if ((morphism <  ciCallProfile::MorphismLimit) ||
 525                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 526 #ifdef ASSERT
 527              if (count > 0) {
 528                this->print_short_name(tty);
 529                tty->print_cr(" @ bci:%d", bci);
 530                this->print_codes();
 531                assert(false, "this call site should not be polymorphic");
 532              }
 533 #endif
 534              result._morphism = morphism;
 535            }
 536         }
 537         // Make the count consistent if this is a call profile. If count is
 538         // zero or less, presume that this is a typecheck profile and
 539         // do nothing.  Otherwise, increase count to be the sum of all
 540         // receiver's counts.
 541         if (count >= 0) {
 542           count += receivers_count_total;
 543         }
 544       }
 545       result._count = count;
 546     }
 547   }
 548   return result;
 549 }
 550 
 551 // ------------------------------------------------------------------
 552 // Add new receiver and sort data by receiver's profile count.
 553 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 554   // Add new receiver and sort data by receiver's counts when we have space
 555   // for it otherwise replace the less called receiver (less called receiver
 556   // is placed to the last array element which is not used).
 557   // First array's element contains most called receiver.
 558   int i = _limit;
 559   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 560     _receiver[i] = _receiver[i-1];
 561     _receiver_count[i] = _receiver_count[i-1];
 562   }
 563   _receiver[i] = receiver;
 564   _receiver_count[i] = receiver_count;
 565   if (_limit < MorphismLimit) _limit++;
 566 }
 567 
 568 
 569 void ciMethod::assert_virtual_call_type_ok(int bci) {
 570   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
 571          java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
 572 }
 573 
 574 void ciMethod::assert_call_type_ok(int bci) {
 575   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
 576          java_code_at_bci(bci) == Bytecodes::_invokespecial ||
 577          java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));
 578 }
 579 
 580 /**
 581  * Check whether profiling provides a type for the argument i to the
 582  * call at bci bci
 583  *
 584  * @param bci  bci of the call
 585  * @param i    argument number
 586  * @return     profiled type
 587  *
 588  * If the profile reports that the argument may be null, return false
 589  * at least for now.
 590  */
 591 ciKlass* ciMethod::argument_profiled_type(int bci, int i) {
 592   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 593     ciProfileData* data = method_data()->bci_to_data(bci);
 594     if (data != NULL) {
 595       if (data->is_VirtualCallTypeData()) {
 596         assert_virtual_call_type_ok(bci);
 597         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 598         if (i >= call->number_of_arguments()) {
 599           return NULL;
 600         }
 601         ciKlass* type = call->valid_argument_type(i);
 602         if (type != NULL && !call->argument_maybe_null(i)) {
 603           return type;
 604         }
 605       } else if (data->is_CallTypeData()) {
 606         assert_call_type_ok(bci);
 607         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 608         if (i >= call->number_of_arguments()) {
 609           return NULL;
 610         }
 611         ciKlass* type = call->valid_argument_type(i);
 612         if (type != NULL && !call->argument_maybe_null(i)) {
 613           return type;
 614         }
 615       }
 616     }
 617   }
 618   return NULL;
 619 }
 620 
 621 /**
 622  * Check whether profiling provides a type for the return value from
 623  * the call at bci bci
 624  *
 625  * @param bci  bci of the call
 626  * @return     profiled type
 627  *
 628  * If the profile reports that the argument may be null, return false
 629  * at least for now.
 630  */
 631 ciKlass* ciMethod::return_profiled_type(int bci) {
 632   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
 633     ciProfileData* data = method_data()->bci_to_data(bci);
 634     if (data != NULL) {
 635       if (data->is_VirtualCallTypeData()) {
 636         assert_virtual_call_type_ok(bci);
 637         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 638         ciKlass* type = call->valid_return_type();
 639         if (type != NULL && !call->return_maybe_null()) {
 640           return type;
 641         }
 642       } else if (data->is_CallTypeData()) {
 643         assert_call_type_ok(bci);
 644         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 645         ciKlass* type = call->valid_return_type();
 646         if (type != NULL && !call->return_maybe_null()) {
 647           return type;
 648         }
 649       }
 650     }
 651   }
 652   return NULL;
 653 }
 654 
 655 /**
 656  * Check whether profiling provides a type for the parameter i
 657  *
 658  * @param i    parameter number
 659  * @return     profiled type
 660  *
 661  * If the profile reports that the argument may be null, return false
 662  * at least for now.
 663  */
 664 ciKlass* ciMethod::parameter_profiled_type(int i) {
 665   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 666     ciParametersTypeData* parameters = method_data()->parameters_type_data();
 667     if (parameters != NULL && i < parameters->number_of_parameters()) {
 668       ciKlass* type = parameters->valid_parameter_type(i);
 669       if (type != NULL && !parameters->parameter_maybe_null(i)) {
 670         return type;
 671       }
 672     }
 673   }
 674   return NULL;
 675 }
 676 
 677 
 678 // ------------------------------------------------------------------
 679 // ciMethod::find_monomorphic_target
 680 //
 681 // Given a certain calling environment, find the monomorphic target
 682 // for the call.  Return NULL if the call is not monomorphic in
 683 // its calling environment, or if there are only abstract methods.
 684 // The returned method is never abstract.
 685 // Note: If caller uses a non-null result, it must inform dependencies
 686 // via assert_unique_concrete_method or assert_leaf_type.
 687 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 688                                             ciInstanceKlass* callee_holder,
 689                                             ciInstanceKlass* actual_recv) {
 690   check_is_loaded();
 691 
 692   if (actual_recv->is_interface()) {
 693     // %%% We cannot trust interface types, yet.  See bug 6312651.
 694     return NULL;
 695   }
 696 
 697   ciMethod* root_m = resolve_invoke(caller, actual_recv);
 698   if (root_m == NULL) {
 699     // Something went wrong looking up the actual receiver method.
 700     return NULL;
 701   }
 702   assert(!root_m->is_abstract(), "resolve_invoke promise");
 703 
 704   // Make certain quick checks even if UseCHA is false.
 705 
 706   // Is it private or final?
 707   if (root_m->can_be_statically_bound()) {
 708     return root_m;
 709   }
 710 
 711   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
 712     // Easy case.  There is no other place to put a method, so don't bother
 713     // to go through the VM_ENTRY_MARK and all the rest.
 714     return root_m;
 715   }
 716 
 717   // Array methods (clone, hashCode, etc.) are always statically bound.
 718   // If we were to see an array type here, we'd return root_m.
 719   // However, this method processes only ciInstanceKlasses.  (See 4962591.)
 720   // The inline_native_clone intrinsic narrows Object to T[] properly,
 721   // so there is no need to do the same job here.
 722 
 723   if (!UseCHA)  return NULL;
 724 
 725   VM_ENTRY_MARK;
 726 
 727   methodHandle target;
 728   {
 729     MutexLocker locker(Compile_lock);
 730     Klass* context = actual_recv->get_Klass();
 731     target = Dependencies::find_unique_concrete_method(context,
 732                                                        root_m->get_Method());
 733     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
 734   }
 735 
 736 #ifndef PRODUCT
 737   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
 738     tty->print("found a non-root unique target method");
 739     tty->print_cr("  context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
 740     tty->print("  method  = ");
 741     target->print_short_name(tty);
 742     tty->cr();
 743   }
 744 #endif //PRODUCT
 745 
 746   if (target() == NULL) {
 747     return NULL;
 748   }
 749   if (target() == root_m->get_Method()) {
 750     return root_m;
 751   }
 752   if (!root_m->is_public() &&
 753       !root_m->is_protected()) {
 754     // If we are going to reason about inheritance, it's easiest
 755     // if the method in question is public, protected, or private.
 756     // If the answer is not root_m, it is conservatively correct
 757     // to return NULL, even if the CHA encountered irrelevant
 758     // methods in other packages.
 759     // %%% TO DO: Work out logic for package-private methods
 760     // with the same name but different vtable indexes.
 761     return NULL;
 762   }
 763   return CURRENT_THREAD_ENV->get_method(target());
 764 }
 765 
 766 // ------------------------------------------------------------------
 767 // ciMethod::resolve_invoke
 768 //
 769 // Given a known receiver klass, find the target for the call.
 770 // Return NULL if the call has no target or the target is abstract.
 771 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
 772    check_is_loaded();
 773    VM_ENTRY_MARK;
 774 
 775    KlassHandle caller_klass (THREAD, caller->get_Klass());
 776    KlassHandle h_recv       (THREAD, exact_receiver->get_Klass());
 777    KlassHandle h_resolved   (THREAD, holder()->get_Klass());
 778    Symbol* h_name      = name()->get_symbol();
 779    Symbol* h_signature = signature()->get_symbol();
 780 
 781    methodHandle m;
 782    // Only do exact lookup if receiver klass has been linked.  Otherwise,
 783    // the vtable has not been setup, and the LinkResolver will fail.
 784    if (h_recv->oop_is_array()
 785         ||
 786        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
 787      if (holder()->is_interface()) {
 788        m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
 789      } else {
 790        m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
 791      }
 792    }
 793 
 794    if (m.is_null()) {
 795      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 796      return NULL;
 797    }
 798 
 799    ciMethod* result = this;
 800    if (m() != get_Method()) {
 801      result = CURRENT_THREAD_ENV->get_method(m());
 802    }
 803 
 804    // Don't return abstract methods because they aren't
 805    // optimizable or interesting.
 806    if (result->is_abstract()) {
 807      return NULL;
 808    } else {
 809      return result;
 810    }
 811 }
 812 
 813 // ------------------------------------------------------------------
 814 // ciMethod::resolve_vtable_index
 815 //
 816 // Given a known receiver klass, find the vtable index for the call.
 817 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 818 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 819    check_is_loaded();
 820 
 821    int vtable_index = Method::invalid_vtable_index;
 822    // Only do lookup if receiver klass has been linked.  Otherwise,
 823    // the vtable has not been setup, and the LinkResolver will fail.
 824    if (!receiver->is_interface()
 825        && (!receiver->is_instance_klass() ||
 826            receiver->as_instance_klass()->is_linked())) {
 827      VM_ENTRY_MARK;
 828 
 829      KlassHandle caller_klass (THREAD, caller->get_Klass());
 830      KlassHandle h_recv       (THREAD, receiver->get_Klass());
 831      Symbol* h_name = name()->get_symbol();
 832      Symbol* h_signature = signature()->get_symbol();
 833 
 834      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
 835      if (vtable_index == Method::nonvirtual_vtable_index) {
 836        // A statically bound method.  Return "no such index".
 837        vtable_index = Method::invalid_vtable_index;
 838      }
 839    }
 840 
 841    return vtable_index;
 842 }
 843 
 844 // ------------------------------------------------------------------
 845 // ciMethod::interpreter_call_site_count
 846 int ciMethod::interpreter_call_site_count(int bci) {
 847   if (method_data() != NULL) {
 848     ResourceMark rm;
 849     ciProfileData* data = method_data()->bci_to_data(bci);
 850     if (data != NULL && data->is_CounterData()) {
 851       return scale_count(data->as_CounterData()->count());
 852     }
 853   }
 854   return -1;  // unknown
 855 }
 856 
 857 // ------------------------------------------------------------------
 858 // ciMethod::get_field_at_bci
 859 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 860   ciBytecodeStream iter(this);
 861   iter.reset_to_bci(bci);
 862   iter.next();
 863   return iter.get_field(will_link);
 864 }
 865 
 866 // ------------------------------------------------------------------
 867 // ciMethod::get_method_at_bci
 868 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 869   ciBytecodeStream iter(this);
 870   iter.reset_to_bci(bci);
 871   iter.next();
 872   return iter.get_method(will_link, declared_signature);
 873 }
 874 
 875 // ------------------------------------------------------------------
 876 // Adjust a CounterData count to be commensurate with
 877 // interpreter_invocation_count.  If the MDO exists for
 878 // only 25% of the time the method exists, then the
 879 // counts in the MDO should be scaled by 4X, so that
 880 // they can be usefully and stably compared against the
 881 // invocation counts in methods.
 882 int ciMethod::scale_count(int count, float prof_factor) {
 883   if (count > 0 && method_data() != NULL) {
 884     int counter_life;
 885     int method_life = interpreter_invocation_count();
 886     if (TieredCompilation) {
 887       // In tiered the MDO's life is measured directly, so just use the snapshotted counters
 888       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
 889     } else {
 890       int current_mileage = method_data()->current_mileage();
 891       int creation_mileage = method_data()->creation_mileage();
 892       counter_life = current_mileage - creation_mileage;
 893     }
 894 
 895     // counter_life due to backedge_counter could be > method_life
 896     if (counter_life > method_life)
 897       counter_life = method_life;
 898     if (0 < counter_life && counter_life <= method_life) {
 899       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 900       count = (count > 0) ? count : 1;
 901     }
 902   }
 903   return count;
 904 }
 905 
 906 
 907 // ------------------------------------------------------------------
 908 // ciMethod::is_special_get_caller_class_method
 909 //
 910 bool ciMethod::is_ignored_by_security_stack_walk() const {
 911   check_is_loaded();
 912   VM_ENTRY_MARK;
 913   return get_Method()->is_ignored_by_security_stack_walk();
 914 }
 915 
 916 
 917 // ------------------------------------------------------------------
 918 // invokedynamic support
 919 
 920 // ------------------------------------------------------------------
 921 // ciMethod::is_method_handle_intrinsic
 922 //
 923 // Return true if the method is an instance of the JVM-generated
 924 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 925 bool ciMethod::is_method_handle_intrinsic() const {
 926   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 927   return (MethodHandles::is_signature_polymorphic(iid) &&
 928           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 929 }
 930 
 931 // ------------------------------------------------------------------
 932 // ciMethod::is_compiled_lambda_form
 933 //
 934 // Return true if the method is a generated MethodHandle adapter.
 935 // These are built by Java code.
 936 bool ciMethod::is_compiled_lambda_form() const {
 937   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 938   return iid == vmIntrinsics::_compiledLambdaForm;
 939 }
 940 
 941 // ------------------------------------------------------------------
 942 // ciMethod::has_member_arg
 943 //
 944 // Return true if the method is a linker intrinsic like _linkToVirtual.
 945 // These are built by the JVM.
 946 bool ciMethod::has_member_arg() const {
 947   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 948   return (MethodHandles::is_signature_polymorphic(iid) &&
 949           MethodHandles::has_member_arg(iid));
 950 }
 951 
 952 // ------------------------------------------------------------------
 953 // ciMethod::ensure_method_data
 954 //
 955 // Generate new MethodData* objects at compile time.
 956 // Return true if allocation was successful or no MDO is required.
 957 bool ciMethod::ensure_method_data(methodHandle h_m) {
 958   EXCEPTION_CONTEXT;
 959   if (is_native() || is_abstract() || h_m()->is_accessor()) {
 960     return true;
 961   }
 962   if (h_m()->method_data() == NULL) {
 963     Method::build_interpreter_method_data(h_m, THREAD);
 964     if (HAS_PENDING_EXCEPTION) {
 965       CLEAR_PENDING_EXCEPTION;
 966     }
 967   }
 968   if (h_m()->method_data() != NULL) {
 969     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 970     _method_data->load_data();
 971     return true;
 972   } else {
 973     _method_data = CURRENT_ENV->get_empty_methodData();
 974     return false;
 975   }
 976 }
 977 
 978 // public, retroactive version
 979 bool ciMethod::ensure_method_data() {
 980   bool result = true;
 981   if (_method_data == NULL || _method_data->is_empty()) {
 982     GUARDED_VM_ENTRY({
 983       result = ensure_method_data(get_Method());
 984     });
 985   }
 986   return result;
 987 }
 988 
 989 
 990 // ------------------------------------------------------------------
 991 // ciMethod::method_data
 992 //
 993 ciMethodData* ciMethod::method_data() {
 994   if (_method_data != NULL) {
 995     return _method_data;
 996   }
 997   VM_ENTRY_MARK;
 998   ciEnv* env = CURRENT_ENV;
 999   Thread* my_thread = JavaThread::current();
1000   methodHandle h_m(my_thread, get_Method());
1001 
1002   if (h_m()->method_data() != NULL) {
1003     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1004     _method_data->load_data();
1005   } else {
1006     _method_data = CURRENT_ENV->get_empty_methodData();
1007   }
1008   return _method_data;
1009 
1010 }
1011 
1012 // ------------------------------------------------------------------
1013 // ciMethod::method_data_or_null
1014 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1015 // NULL otherwise.
1016 ciMethodData* ciMethod::method_data_or_null() {
1017   ciMethodData *md = method_data();
1018   if (md->is_empty()) {
1019     return NULL;
1020   }
1021   return md;
1022 }
1023 
1024 // ------------------------------------------------------------------
1025 // ciMethod::ensure_method_counters
1026 //
1027 MethodCounters* ciMethod::ensure_method_counters() {
1028   check_is_loaded();
1029   VM_ENTRY_MARK;
1030   methodHandle mh(THREAD, get_Method());
1031   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1032   return method_counters;
1033 }
1034 
1035 // ------------------------------------------------------------------
1036 // ciMethod::should_exclude
1037 //
1038 // Should this method be excluded from compilation?
1039 bool ciMethod::should_exclude() {
1040   check_is_loaded();
1041   VM_ENTRY_MARK;
1042   methodHandle mh(THREAD, get_Method());
1043   bool ignore;
1044   return CompilerOracle::should_exclude(mh, ignore);
1045 }
1046 
1047 // ------------------------------------------------------------------
1048 // ciMethod::should_inline
1049 //
1050 // Should this method be inlined during compilation?
1051 bool ciMethod::should_inline() {
1052   check_is_loaded();
1053   VM_ENTRY_MARK;
1054   methodHandle mh(THREAD, get_Method());
1055   return CompilerOracle::should_inline(mh);
1056 }
1057 
1058 // ------------------------------------------------------------------
1059 // ciMethod::should_not_inline
1060 //
1061 // Should this method be disallowed from inlining during compilation?
1062 bool ciMethod::should_not_inline() {
1063   check_is_loaded();
1064   VM_ENTRY_MARK;
1065   methodHandle mh(THREAD, get_Method());
1066   return CompilerOracle::should_not_inline(mh);
1067 }
1068 
1069 // ------------------------------------------------------------------
1070 // ciMethod::should_print_assembly
1071 //
1072 // Should the compiler print the generated code for this method?
1073 bool ciMethod::should_print_assembly() {
1074   check_is_loaded();
1075   VM_ENTRY_MARK;
1076   methodHandle mh(THREAD, get_Method());
1077   return CompilerOracle::should_print(mh);
1078 }
1079 
1080 // ------------------------------------------------------------------
1081 // ciMethod::break_at_execute
1082 //
1083 // Should the compiler insert a breakpoint into the generated code
1084 // method?
1085 bool ciMethod::break_at_execute() {
1086   check_is_loaded();
1087   VM_ENTRY_MARK;
1088   methodHandle mh(THREAD, get_Method());
1089   return CompilerOracle::should_break_at(mh);
1090 }
1091 
1092 // ------------------------------------------------------------------
1093 // ciMethod::has_option
1094 //
1095 bool ciMethod::has_option(const char* option) {
1096   check_is_loaded();
1097   VM_ENTRY_MARK;
1098   methodHandle mh(THREAD, get_Method());
1099   return CompilerOracle::has_option_string(mh, option);
1100 }
1101 
1102 // ------------------------------------------------------------------
1103 // ciMethod::can_be_compiled
1104 //
1105 // Have previous compilations of this method succeeded?
1106 bool ciMethod::can_be_compiled() {
1107   check_is_loaded();
1108   ciEnv* env = CURRENT_ENV;
1109   if (is_c1_compile(env->comp_level())) {
1110     return _is_c1_compilable;
1111   }
1112   return _is_c2_compilable;
1113 }
1114 
1115 // ------------------------------------------------------------------
1116 // ciMethod::set_not_compilable
1117 //
1118 // Tell the VM that this method cannot be compiled at all.
1119 void ciMethod::set_not_compilable(const char* reason) {
1120   check_is_loaded();
1121   VM_ENTRY_MARK;
1122   ciEnv* env = CURRENT_ENV;
1123   if (is_c1_compile(env->comp_level())) {
1124     _is_c1_compilable = false;
1125   } else {
1126     _is_c2_compilable = false;
1127   }
1128   get_Method()->set_not_compilable(env->comp_level(), true, reason);
1129 }
1130 
1131 // ------------------------------------------------------------------
1132 // ciMethod::can_be_osr_compiled
1133 //
1134 // Have previous compilations of this method succeeded?
1135 //
1136 // Implementation note: the VM does not currently keep track
1137 // of failed OSR compilations per bci.  The entry_bci parameter
1138 // is currently unused.
1139 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1140   check_is_loaded();
1141   VM_ENTRY_MARK;
1142   ciEnv* env = CURRENT_ENV;
1143   return !get_Method()->is_not_osr_compilable(env->comp_level());
1144 }
1145 
1146 // ------------------------------------------------------------------
1147 // ciMethod::has_compiled_code
1148 bool ciMethod::has_compiled_code() {
1149   return instructions_size() > 0;
1150 }
1151 
1152 int ciMethod::comp_level() {
1153   check_is_loaded();
1154   VM_ENTRY_MARK;
1155   nmethod* nm = get_Method()->code();
1156   if (nm != NULL) return nm->comp_level();
1157   return 0;
1158 }
1159 
1160 int ciMethod::highest_osr_comp_level() {
1161   check_is_loaded();
1162   VM_ENTRY_MARK;
1163   return get_Method()->highest_osr_comp_level();
1164 }
1165 
1166 // ------------------------------------------------------------------
1167 // ciMethod::code_size_for_inlining
1168 //
1169 // Code size for inlining decisions.  This method returns a code
1170 // size of 1 for methods which has the ForceInline annotation.
1171 int ciMethod::code_size_for_inlining() {
1172   check_is_loaded();
1173   if (get_Method()->force_inline()) {
1174     return 1;
1175   }
1176   return code_size();
1177 }
1178 
1179 // ------------------------------------------------------------------
1180 // ciMethod::instructions_size
1181 //
1182 // This is a rough metric for "fat" methods, compared before inlining
1183 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1184 // junk like exception handler, stubs, and constant table, which are
1185 // not highly relevant to an inlined method.  So we use the more
1186 // specific accessor nmethod::insts_size.
1187 int ciMethod::instructions_size() {
1188   if (_instructions_size == -1) {
1189     GUARDED_VM_ENTRY(
1190                      nmethod* code = get_Method()->code();
1191                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1192                        _instructions_size = code->insts_end() - code->verified_entry_point();
1193                      } else {
1194                        _instructions_size = 0;
1195                      }
1196                      );
1197   }
1198   return _instructions_size;
1199 }
1200 
1201 // ------------------------------------------------------------------
1202 // ciMethod::log_nmethod_identity
1203 void ciMethod::log_nmethod_identity(xmlStream* log) {
1204   GUARDED_VM_ENTRY(
1205     nmethod* code = get_Method()->code();
1206     if (code != NULL) {
1207       code->log_identity(log);
1208     }
1209   )
1210 }
1211 
1212 // ------------------------------------------------------------------
1213 // ciMethod::is_not_reached
1214 bool ciMethod::is_not_reached(int bci) {
1215   check_is_loaded();
1216   VM_ENTRY_MARK;
1217   return Interpreter::is_not_reached(
1218                methodHandle(THREAD, get_Method()), bci);
1219 }
1220 
1221 // ------------------------------------------------------------------
1222 // ciMethod::was_never_executed
1223 bool ciMethod::was_executed_more_than(int times) {
1224   VM_ENTRY_MARK;
1225   return get_Method()->was_executed_more_than(times);
1226 }
1227 
1228 // ------------------------------------------------------------------
1229 // ciMethod::has_unloaded_classes_in_signature
1230 bool ciMethod::has_unloaded_classes_in_signature() {
1231   VM_ENTRY_MARK;
1232   {
1233     EXCEPTION_MARK;
1234     methodHandle m(THREAD, get_Method());
1235     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1236     if( HAS_PENDING_EXCEPTION ) {
1237       CLEAR_PENDING_EXCEPTION;
1238       return true;     // Declare that we may have unloaded classes
1239     }
1240     return has_unloaded;
1241   }
1242 }
1243 
1244 // ------------------------------------------------------------------
1245 // ciMethod::is_klass_loaded
1246 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1247   VM_ENTRY_MARK;
1248   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1249 }
1250 
1251 // ------------------------------------------------------------------
1252 // ciMethod::check_call
1253 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1254   // This method is used only in C2 from InlineTree::ok_to_inline,
1255   // and is only used under -Xcomp or -XX:CompileTheWorld.
1256   // It appears to fail when applied to an invokeinterface call site.
1257   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1258   VM_ENTRY_MARK;
1259   {
1260     EXCEPTION_MARK;
1261     HandleMark hm(THREAD);
1262     constantPoolHandle pool (THREAD, get_Method()->constants());
1263     methodHandle spec_method;
1264     KlassHandle  spec_klass;
1265     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1266     LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
1267     if (HAS_PENDING_EXCEPTION) {
1268       CLEAR_PENDING_EXCEPTION;
1269       return false;
1270     } else {
1271       return (spec_method->is_static() == is_static);
1272     }
1273   }
1274   return false;
1275 }
1276 
1277 // ------------------------------------------------------------------
1278 // ciMethod::print_codes
1279 //
1280 // Print the bytecodes for this method.
1281 void ciMethod::print_codes_on(outputStream* st) {
1282   check_is_loaded();
1283   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1284 }
1285 
1286 
1287 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1288   check_is_loaded(); \
1289   VM_ENTRY_MARK; \
1290   return get_Method()->flag_accessor(); \
1291 }
1292 
1293 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1294 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1295 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1296 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1297 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1298 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }
1299 
1300 bool ciMethod::is_boxing_method() const {
1301   if (holder()->is_box_klass()) {
1302     switch (intrinsic_id()) {
1303       case vmIntrinsics::_Boolean_valueOf:
1304       case vmIntrinsics::_Byte_valueOf:
1305       case vmIntrinsics::_Character_valueOf:
1306       case vmIntrinsics::_Short_valueOf:
1307       case vmIntrinsics::_Integer_valueOf:
1308       case vmIntrinsics::_Long_valueOf:
1309       case vmIntrinsics::_Float_valueOf:
1310       case vmIntrinsics::_Double_valueOf:
1311         return true;
1312       default:
1313         return false;
1314     }
1315   }
1316   return false;
1317 }
1318 
1319 bool ciMethod::is_unboxing_method() const {
1320   if (holder()->is_box_klass()) {
1321     switch (intrinsic_id()) {
1322       case vmIntrinsics::_booleanValue:
1323       case vmIntrinsics::_byteValue:
1324       case vmIntrinsics::_charValue:
1325       case vmIntrinsics::_shortValue:
1326       case vmIntrinsics::_intValue:
1327       case vmIntrinsics::_longValue:
1328       case vmIntrinsics::_floatValue:
1329       case vmIntrinsics::_doubleValue:
1330         return true;
1331       default:
1332         return false;
1333     }
1334   }
1335   return false;
1336 }
1337 
1338 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1339 #ifdef COMPILER2
1340   if (_bcea == NULL) {
1341     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1342   }
1343   return _bcea;
1344 #else // COMPILER2
1345   ShouldNotReachHere();
1346   return NULL;
1347 #endif // COMPILER2
1348 }
1349 
1350 ciMethodBlocks  *ciMethod::get_method_blocks() {
1351   Arena *arena = CURRENT_ENV->arena();
1352   if (_method_blocks == NULL) {
1353     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1354   }
1355   return _method_blocks;
1356 }
1357 
1358 #undef FETCH_FLAG_FROM_VM
1359 
1360 void ciMethod::dump_name_as_ascii(outputStream* st) {
1361   Method* method = get_Method();
1362   st->print("%s %s %s",
1363             method->klass_name()->as_quoted_ascii(),
1364             method->name()->as_quoted_ascii(),
1365             method->signature()->as_quoted_ascii());
1366 }
1367 
1368 void ciMethod::dump_replay_data(outputStream* st) {
1369   ResourceMark rm;
1370   Method* method = get_Method();
1371   MethodCounters* mcs = method->method_counters();
1372   st->print("ciMethod ");
1373   dump_name_as_ascii(st);
1374   st->print_cr(" %d %d %d %d %d",
1375                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1376                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1377                interpreter_invocation_count(),
1378                interpreter_throwout_count(),
1379                _instructions_size);
1380 }
1381 
1382 // ------------------------------------------------------------------
1383 // ciMethod::print_codes
1384 //
1385 // Print a range of the bytecodes for this method.
1386 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1387   check_is_loaded();
1388   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1389 }
1390 
1391 // ------------------------------------------------------------------
1392 // ciMethod::print_name
1393 //
1394 // Print the name of this method, including signature and some flags.
1395 void ciMethod::print_name(outputStream* st) {
1396   check_is_loaded();
1397   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1398 }
1399 
1400 // ------------------------------------------------------------------
1401 // ciMethod::print_short_name
1402 //
1403 // Print the name of this method, without signature.
1404 void ciMethod::print_short_name(outputStream* st) {
1405   if (is_loaded()) {
1406     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1407   } else {
1408     // Fall back if method is not loaded.
1409     holder()->print_name_on(st);
1410     st->print("::");
1411     name()->print_symbol_on(st);
1412     if (WizardMode)
1413       signature()->as_symbol()->print_symbol_on(st);
1414   }
1415 }
1416 
1417 // ------------------------------------------------------------------
1418 // ciMethod::print_impl
1419 //
1420 // Implementation of the print method.
1421 void ciMethod::print_impl(outputStream* st) {
1422   ciMetadata::print_impl(st);
1423   st->print(" name=");
1424   name()->print_symbol_on(st);
1425   st->print(" holder=");
1426   holder()->print_name_on(st);
1427   st->print(" signature=");
1428   signature()->as_symbol()->print_symbol_on(st);
1429   if (is_loaded()) {
1430     st->print(" loaded=true");
1431     st->print(" arg_size=%d", arg_size());
1432     st->print(" flags=");
1433     flags().print_member_flags(st);
1434   } else {
1435     st->print(" loaded=false");
1436   }
1437 }