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   return klassItable::compute_itable_index(get_Method());
 290 }
 291 #endif // SHARK
 292 
 293 
 294 // ------------------------------------------------------------------
 295 // ciMethod::native_entry
 296 //
 297 // Get the address of this method's native code, if any.
 298 address ciMethod::native_entry() {
 299   check_is_loaded();
 300   assert(flags().is_native(), "must be native method");
 301   VM_ENTRY_MARK;
 302   Method* method = get_Method();
 303   address entry = method->native_function();
 304   assert(entry != NULL, "must be valid entry point");
 305   return entry;
 306 }
 307 
 308 
 309 // ------------------------------------------------------------------
 310 // ciMethod::interpreter_entry
 311 //
 312 // Get the entry point for running this method in the interpreter.
 313 address ciMethod::interpreter_entry() {
 314   check_is_loaded();
 315   VM_ENTRY_MARK;
 316   methodHandle mh(THREAD, get_Method());
 317   return Interpreter::entry_for_method(mh);
 318 }
 319 
 320 
 321 // ------------------------------------------------------------------
 322 // ciMethod::uses_balanced_monitors
 323 //
 324 // Does this method use monitors in a strict stack-disciplined manner?
 325 bool ciMethod::has_balanced_monitors() {
 326   check_is_loaded();
 327   if (_balanced_monitors) return true;
 328 
 329   // Analyze the method to see if monitors are used properly.
 330   VM_ENTRY_MARK;
 331   methodHandle method(THREAD, get_Method());
 332   assert(method->has_monitor_bytecodes(), "should have checked this");
 333 
 334   // Check to see if a previous compilation computed the
 335   // monitor-matching analysis.
 336   if (method->guaranteed_monitor_matching()) {
 337     _balanced_monitors = true;
 338     return true;
 339   }
 340 
 341   {
 342     EXCEPTION_MARK;
 343     ResourceMark rm(THREAD);
 344     GeneratePairingInfo gpi(method);
 345     gpi.compute_map(CATCH);
 346     if (!gpi.monitor_safe()) {
 347       return false;
 348     }
 349     method->set_guaranteed_monitor_matching();
 350     _balanced_monitors = true;
 351   }
 352   return true;
 353 }
 354 
 355 
 356 // ------------------------------------------------------------------
 357 // ciMethod::get_flow_analysis
 358 ciTypeFlow* ciMethod::get_flow_analysis() {
 359 #if defined(COMPILER2) || defined(SHARK)
 360   if (_flow == NULL) {
 361     ciEnv* env = CURRENT_ENV;
 362     _flow = new (env->arena()) ciTypeFlow(env, this);
 363     _flow->do_flow();
 364   }
 365   return _flow;
 366 #else // COMPILER2 || SHARK
 367   ShouldNotReachHere();
 368   return NULL;
 369 #endif // COMPILER2 || SHARK
 370 }
 371 
 372 
 373 // ------------------------------------------------------------------
 374 // ciMethod::get_osr_flow_analysis
 375 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 376 #if defined(COMPILER2) || defined(SHARK)
 377   // OSR entry points are always place after a call bytecode of some sort
 378   assert(osr_bci >= 0, "must supply valid OSR entry point");
 379   ciEnv* env = CURRENT_ENV;
 380   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 381   flow->do_flow();
 382   return flow;
 383 #else // COMPILER2 || SHARK
 384   ShouldNotReachHere();
 385   return NULL;
 386 #endif // COMPILER2 || SHARK
 387 }
 388 
 389 // ------------------------------------------------------------------
 390 // ciMethod::raw_liveness_at_bci
 391 //
 392 // Which local variables are live at a specific bci?
 393 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 394   check_is_loaded();
 395   if (_liveness == NULL) {
 396     // Create the liveness analyzer.
 397     Arena* arena = CURRENT_ENV->arena();
 398     _liveness = new (arena) MethodLiveness(arena, this);
 399     _liveness->compute_liveness();
 400   }
 401   return _liveness->get_liveness_at(bci);
 402 }
 403 
 404 // ------------------------------------------------------------------
 405 // ciMethod::liveness_at_bci
 406 //
 407 // Which local variables are live at a specific bci?  When debugging
 408 // will return true for all locals in some cases to improve debug
 409 // information.
 410 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 411   MethodLivenessResult result = raw_liveness_at_bci(bci);
 412   if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
 413     // Keep all locals live for the user's edification and amusement.
 414     result.at_put_range(0, result.size(), true);
 415   }
 416   return result;
 417 }
 418 
 419 // ciMethod::live_local_oops_at_bci
 420 //
 421 // find all the live oops in the locals array for a particular bci
 422 // Compute what the interpreter believes by using the interpreter
 423 // oopmap generator. This is used as a double check during osr to
 424 // guard against conservative result from MethodLiveness making us
 425 // think a dead oop is live.  MethodLiveness is conservative in the
 426 // sense that it may consider locals to be live which cannot be live,
 427 // like in the case where a local could contain an oop or  a primitive
 428 // along different paths.  In that case the local must be dead when
 429 // those paths merge. Since the interpreter's viewpoint is used when
 430 // gc'ing an interpreter frame we need to use its viewpoint  during
 431 // OSR when loading the locals.
 432 
 433 BitMap ciMethod::live_local_oops_at_bci(int bci) {
 434   VM_ENTRY_MARK;
 435   InterpreterOopMap mask;
 436   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);
 437   int mask_size = max_locals();
 438   BitMap result(mask_size);
 439   result.clear();
 440   int i;
 441   for (i = 0; i < mask_size ; i++ ) {
 442     if (mask.is_oop(i)) result.set_bit(i);
 443   }
 444   return result;
 445 }
 446 
 447 
 448 #ifdef COMPILER1
 449 // ------------------------------------------------------------------
 450 // ciMethod::bci_block_start
 451 //
 452 // Marks all bcis where a new basic block starts
 453 const BitMap ciMethod::bci_block_start() {
 454   check_is_loaded();
 455   if (_liveness == NULL) {
 456     // Create the liveness analyzer.
 457     Arena* arena = CURRENT_ENV->arena();
 458     _liveness = new (arena) MethodLiveness(arena, this);
 459     _liveness->compute_liveness();
 460   }
 461 
 462   return _liveness->get_bci_block_start();
 463 }
 464 #endif // COMPILER1
 465 
 466 
 467 // ------------------------------------------------------------------
 468 // ciMethod::call_profile_at_bci
 469 //
 470 // Get the ciCallProfile for the invocation of this method.
 471 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 472 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 473   ResourceMark rm;
 474   ciCallProfile result;
 475   if (method_data() != NULL && method_data()->is_mature()) {
 476     ciProfileData* data = method_data()->bci_to_data(bci);
 477     if (data != NULL && data->is_CounterData()) {
 478       // Every profiled call site has a counter.
 479       int count = data->as_CounterData()->count();
 480 
 481       if (!data->is_ReceiverTypeData()) {
 482         result._receiver_count[0] = 0;  // that's a definite zero
 483       } else { // ReceiverTypeData is a subclass of CounterData
 484         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 485         // In addition, virtual call sites have receiver type information
 486         int receivers_count_total = 0;
 487         int morphism = 0;
 488         // Precompute morphism for the possible fixup
 489         for (uint i = 0; i < call->row_limit(); i++) {
 490           ciKlass* receiver = call->receiver(i);
 491           if (receiver == NULL)  continue;
 492           morphism++;
 493         }
 494         int epsilon = 0;
 495         if (TieredCompilation && ProfileInterpreter) {
 496           // Interpreter and C1 treat final and special invokes differently.
 497           // C1 will record a type, whereas the interpreter will just
 498           // increment the count. Detect this case.
 499           if (morphism == 1 && count > 0) {
 500             epsilon = count;
 501             count = 0;
 502           }
 503         }
 504         for (uint i = 0; i < call->row_limit(); i++) {
 505           ciKlass* receiver = call->receiver(i);
 506           if (receiver == NULL)  continue;
 507           int rcount = call->receiver_count(i) + epsilon;
 508           if (rcount == 0) rcount = 1; // Should be valid value
 509           receivers_count_total += rcount;
 510           // Add the receiver to result data.
 511           result.add_receiver(receiver, rcount);
 512           // If we extend profiling to record methods,
 513           // we will set result._method also.
 514         }
 515         // Determine call site's morphism.
 516         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)
 517         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.
 518         // The call site count is > 0 in the case of a polymorphic virtual call.
 519         if (morphism > 0 && morphism == result._limit) {
 520            // The morphism <= MorphismLimit.
 521            if ((morphism <  ciCallProfile::MorphismLimit) ||
 522                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 523 #ifdef ASSERT
 524              if (count > 0) {
 525                this->print_short_name(tty);
 526                tty->print_cr(" @ bci:%d", bci);
 527                this->print_codes();
 528                assert(false, "this call site should not be polymorphic");
 529              }
 530 #endif
 531              result._morphism = morphism;
 532            }
 533         }
 534         // Make the count consistent if this is a call profile. If count is
 535         // zero or less, presume that this is a typecheck profile and
 536         // do nothing.  Otherwise, increase count to be the sum of all
 537         // receiver's counts.
 538         if (count >= 0) {
 539           count += receivers_count_total;
 540         }
 541       }
 542       result._count = count;
 543     }
 544   }
 545   return result;
 546 }
 547 
 548 // ------------------------------------------------------------------
 549 // Add new receiver and sort data by receiver's profile count.
 550 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 551   // Add new receiver and sort data by receiver's counts when we have space
 552   // for it otherwise replace the less called receiver (less called receiver
 553   // is placed to the last array element which is not used).
 554   // First array's element contains most called receiver.
 555   int i = _limit;
 556   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 557     _receiver[i] = _receiver[i-1];
 558     _receiver_count[i] = _receiver_count[i-1];
 559   }
 560   _receiver[i] = receiver;
 561   _receiver_count[i] = receiver_count;
 562   if (_limit < MorphismLimit) _limit++;
 563 }
 564 
 565 // ------------------------------------------------------------------
 566 // ciMethod::find_monomorphic_target
 567 //
 568 // Given a certain calling environment, find the monomorphic target
 569 // for the call.  Return NULL if the call is not monomorphic in
 570 // its calling environment, or if there are only abstract methods.
 571 // The returned method is never abstract.
 572 // Note: If caller uses a non-null result, it must inform dependencies
 573 // via assert_unique_concrete_method or assert_leaf_type.
 574 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 575                                             ciInstanceKlass* callee_holder,
 576                                             ciInstanceKlass* actual_recv) {
 577   check_is_loaded();
 578 
 579   if (actual_recv->is_interface()) {
 580     // %%% We cannot trust interface types, yet.  See bug 6312651.
 581     return NULL;
 582   }
 583 
 584   ciMethod* root_m = resolve_invoke(caller, actual_recv);
 585   if (root_m == NULL) {
 586     // Something went wrong looking up the actual receiver method.
 587     return NULL;
 588   }
 589   assert(!root_m->is_abstract(), "resolve_invoke promise");
 590 
 591   // Make certain quick checks even if UseCHA is false.
 592 
 593   // Is it private or final?
 594   if (root_m->can_be_statically_bound()) {
 595     return root_m;
 596   }
 597 
 598   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
 599     // Easy case.  There is no other place to put a method, so don't bother
 600     // to go through the VM_ENTRY_MARK and all the rest.
 601     return root_m;
 602   }
 603 
 604   // Array methods (clone, hashCode, etc.) are always statically bound.
 605   // If we were to see an array type here, we'd return root_m.
 606   // However, this method processes only ciInstanceKlasses.  (See 4962591.)
 607   // The inline_native_clone intrinsic narrows Object to T[] properly,
 608   // so there is no need to do the same job here.
 609 
 610   if (!UseCHA)  return NULL;
 611 
 612   VM_ENTRY_MARK;
 613 
 614   methodHandle target;
 615   {
 616     MutexLocker locker(Compile_lock);
 617     Klass* context = actual_recv->get_Klass();
 618     target = Dependencies::find_unique_concrete_method(context,
 619                                                        root_m->get_Method());
 620     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
 621   }
 622 
 623 #ifndef PRODUCT
 624   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
 625     tty->print("found a non-root unique target method");
 626     tty->print_cr("  context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());
 627     tty->print("  method  = ");
 628     target->print_short_name(tty);
 629     tty->cr();
 630   }
 631 #endif //PRODUCT
 632 
 633   if (target() == NULL) {
 634     return NULL;
 635   }
 636   if (target() == root_m->get_Method()) {
 637     return root_m;
 638   }
 639   if (!root_m->is_public() &&
 640       !root_m->is_protected()) {
 641     // If we are going to reason about inheritance, it's easiest
 642     // if the method in question is public, protected, or private.
 643     // If the answer is not root_m, it is conservatively correct
 644     // to return NULL, even if the CHA encountered irrelevant
 645     // methods in other packages.
 646     // %%% TO DO: Work out logic for package-private methods
 647     // with the same name but different vtable indexes.
 648     return NULL;
 649   }
 650   return CURRENT_THREAD_ENV->get_method(target());
 651 }
 652 
 653 // ------------------------------------------------------------------
 654 // ciMethod::resolve_invoke
 655 //
 656 // Given a known receiver klass, find the target for the call.
 657 // Return NULL if the call has no target or the target is abstract.
 658 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
 659    check_is_loaded();
 660    VM_ENTRY_MARK;
 661 
 662    KlassHandle caller_klass (THREAD, caller->get_Klass());
 663    KlassHandle h_recv       (THREAD, exact_receiver->get_Klass());
 664    KlassHandle h_resolved   (THREAD, holder()->get_Klass());
 665    Symbol* h_name      = name()->get_symbol();
 666    Symbol* h_signature = signature()->get_symbol();
 667 
 668    methodHandle m;
 669    // Only do exact lookup if receiver klass has been linked.  Otherwise,
 670    // the vtable has not been setup, and the LinkResolver will fail.
 671    if (h_recv->oop_is_array()
 672         ||
 673        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
 674      if (holder()->is_interface()) {
 675        m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
 676      } else {
 677        m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
 678      }
 679    }
 680 
 681    if (m.is_null()) {
 682      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 683      return NULL;
 684    }
 685 
 686    ciMethod* result = this;
 687    if (m() != get_Method()) {
 688      result = CURRENT_THREAD_ENV->get_method(m());
 689    }
 690 
 691    // Don't return abstract methods because they aren't
 692    // optimizable or interesting.
 693    if (result->is_abstract()) {
 694      return NULL;
 695    } else {
 696      return result;
 697    }
 698 }
 699 
 700 // ------------------------------------------------------------------
 701 // ciMethod::resolve_vtable_index
 702 //
 703 // Given a known receiver klass, find the vtable index for the call.
 704 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 705 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 706    check_is_loaded();
 707 
 708    int vtable_index = Method::invalid_vtable_index;
 709    // Only do lookup if receiver klass has been linked.  Otherwise,
 710    // the vtable has not been setup, and the LinkResolver will fail.
 711    if (!receiver->is_interface()
 712        && (!receiver->is_instance_klass() ||
 713            receiver->as_instance_klass()->is_linked())) {
 714      VM_ENTRY_MARK;
 715 
 716      KlassHandle caller_klass (THREAD, caller->get_Klass());
 717      KlassHandle h_recv       (THREAD, receiver->get_Klass());
 718      Symbol* h_name = name()->get_symbol();
 719      Symbol* h_signature = signature()->get_symbol();
 720 
 721      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
 722      if (vtable_index == Method::nonvirtual_vtable_index) {
 723        // A statically bound method.  Return "no such index".
 724        vtable_index = Method::invalid_vtable_index;
 725      }
 726    }
 727 
 728    return vtable_index;
 729 }
 730 
 731 // ------------------------------------------------------------------
 732 // ciMethod::interpreter_call_site_count
 733 int ciMethod::interpreter_call_site_count(int bci) {
 734   if (method_data() != NULL) {
 735     ResourceMark rm;
 736     ciProfileData* data = method_data()->bci_to_data(bci);
 737     if (data != NULL && data->is_CounterData()) {
 738       return scale_count(data->as_CounterData()->count());
 739     }
 740   }
 741   return -1;  // unknown
 742 }
 743 
 744 // ------------------------------------------------------------------
 745 // ciMethod::get_field_at_bci
 746 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 747   ciBytecodeStream iter(this);
 748   iter.reset_to_bci(bci);
 749   iter.next();
 750   return iter.get_field(will_link);
 751 }
 752 
 753 // ------------------------------------------------------------------
 754 // ciMethod::get_method_at_bci
 755 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 756   ciBytecodeStream iter(this);
 757   iter.reset_to_bci(bci);
 758   iter.next();
 759   return iter.get_method(will_link, declared_signature);
 760 }
 761 
 762 // ------------------------------------------------------------------
 763 // Adjust a CounterData count to be commensurate with
 764 // interpreter_invocation_count.  If the MDO exists for
 765 // only 25% of the time the method exists, then the
 766 // counts in the MDO should be scaled by 4X, so that
 767 // they can be usefully and stably compared against the
 768 // invocation counts in methods.
 769 int ciMethod::scale_count(int count, float prof_factor) {
 770   if (count > 0 && method_data() != NULL) {
 771     int counter_life;
 772     int method_life = interpreter_invocation_count();
 773     if (TieredCompilation) {
 774       // In tiered the MDO's life is measured directly, so just use the snapshotted counters
 775       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());
 776     } else {
 777       int current_mileage = method_data()->current_mileage();
 778       int creation_mileage = method_data()->creation_mileage();
 779       counter_life = current_mileage - creation_mileage;
 780     }
 781 
 782     // counter_life due to backedge_counter could be > method_life
 783     if (counter_life > method_life)
 784       counter_life = method_life;
 785     if (0 < counter_life && counter_life <= method_life) {
 786       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 787       count = (count > 0) ? count : 1;
 788     }
 789   }
 790   return count;
 791 }
 792 
 793 
 794 // ------------------------------------------------------------------
 795 // ciMethod::is_special_get_caller_class_method
 796 //
 797 bool ciMethod::is_ignored_by_security_stack_walk() const {
 798   check_is_loaded();
 799   VM_ENTRY_MARK;
 800   return get_Method()->is_ignored_by_security_stack_walk();
 801 }
 802 
 803 
 804 // ------------------------------------------------------------------
 805 // invokedynamic support
 806 
 807 // ------------------------------------------------------------------
 808 // ciMethod::is_method_handle_intrinsic
 809 //
 810 // Return true if the method is an instance of the JVM-generated
 811 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 812 bool ciMethod::is_method_handle_intrinsic() const {
 813   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 814   return (MethodHandles::is_signature_polymorphic(iid) &&
 815           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 816 }
 817 
 818 // ------------------------------------------------------------------
 819 // ciMethod::is_compiled_lambda_form
 820 //
 821 // Return true if the method is a generated MethodHandle adapter.
 822 // These are built by Java code.
 823 bool ciMethod::is_compiled_lambda_form() const {
 824   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 825   return iid == vmIntrinsics::_compiledLambdaForm;
 826 }
 827 
 828 // ------------------------------------------------------------------
 829 // ciMethod::has_member_arg
 830 //
 831 // Return true if the method is a linker intrinsic like _linkToVirtual.
 832 // These are built by the JVM.
 833 bool ciMethod::has_member_arg() const {
 834   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 835   return (MethodHandles::is_signature_polymorphic(iid) &&
 836           MethodHandles::has_member_arg(iid));
 837 }
 838 
 839 // ------------------------------------------------------------------
 840 // ciMethod::ensure_method_data
 841 //
 842 // Generate new MethodData* objects at compile time.
 843 // Return true if allocation was successful or no MDO is required.
 844 bool ciMethod::ensure_method_data(methodHandle h_m) {
 845   EXCEPTION_CONTEXT;
 846   if (is_native() || is_abstract() || h_m()->is_accessor()) return true;
 847   if (h_m()->method_data() == NULL) {
 848     Method::build_interpreter_method_data(h_m, THREAD);
 849     if (HAS_PENDING_EXCEPTION) {
 850       CLEAR_PENDING_EXCEPTION;
 851     }
 852   }
 853   if (h_m()->method_data() != NULL) {
 854     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 855     _method_data->load_data();
 856     return true;
 857   } else {
 858     _method_data = CURRENT_ENV->get_empty_methodData();
 859     return false;
 860   }
 861 }
 862 
 863 // public, retroactive version
 864 bool ciMethod::ensure_method_data() {
 865   bool result = true;
 866   if (_method_data == NULL || _method_data->is_empty()) {
 867     GUARDED_VM_ENTRY({
 868       result = ensure_method_data(get_Method());
 869     });
 870   }
 871   return result;
 872 }
 873 
 874 
 875 // ------------------------------------------------------------------
 876 // ciMethod::method_data
 877 //
 878 ciMethodData* ciMethod::method_data() {
 879   if (_method_data != NULL) {
 880     return _method_data;
 881   }
 882   VM_ENTRY_MARK;
 883   ciEnv* env = CURRENT_ENV;
 884   Thread* my_thread = JavaThread::current();
 885   methodHandle h_m(my_thread, get_Method());
 886 
 887   if (h_m()->method_data() != NULL) {
 888     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
 889     _method_data->load_data();
 890   } else {
 891     _method_data = CURRENT_ENV->get_empty_methodData();
 892   }
 893   return _method_data;
 894 
 895 }
 896 
 897 // ------------------------------------------------------------------
 898 // ciMethod::method_data_or_null
 899 // Returns a pointer to ciMethodData if MDO exists on the VM side,
 900 // NULL otherwise.
 901 ciMethodData* ciMethod::method_data_or_null() {
 902   ciMethodData *md = method_data();
 903   if (md->is_empty()) return NULL;
 904   return md;
 905 }
 906 
 907 // ------------------------------------------------------------------
 908 // ciMethod::ensure_method_counters
 909 //
 910 address ciMethod::ensure_method_counters() {
 911   check_is_loaded();
 912   VM_ENTRY_MARK;
 913   methodHandle mh(THREAD, get_Method());
 914   MethodCounters *counter = mh->method_counters();
 915   if (counter == NULL) {
 916     counter = Method::build_method_counters(mh(), CHECK_AND_CLEAR_NULL);
 917   }
 918   return (address)counter;
 919 }
 920 
 921 // ------------------------------------------------------------------
 922 // ciMethod::should_exclude
 923 //
 924 // Should this method be excluded from compilation?
 925 bool ciMethod::should_exclude() {
 926   check_is_loaded();
 927   VM_ENTRY_MARK;
 928   methodHandle mh(THREAD, get_Method());
 929   bool ignore;
 930   return CompilerOracle::should_exclude(mh, ignore);
 931 }
 932 
 933 // ------------------------------------------------------------------
 934 // ciMethod::should_inline
 935 //
 936 // Should this method be inlined during compilation?
 937 bool ciMethod::should_inline() {
 938   check_is_loaded();
 939   VM_ENTRY_MARK;
 940   methodHandle mh(THREAD, get_Method());
 941   return CompilerOracle::should_inline(mh);
 942 }
 943 
 944 // ------------------------------------------------------------------
 945 // ciMethod::should_not_inline
 946 //
 947 // Should this method be disallowed from inlining during compilation?
 948 bool ciMethod::should_not_inline() {
 949   check_is_loaded();
 950   VM_ENTRY_MARK;
 951   methodHandle mh(THREAD, get_Method());
 952   return CompilerOracle::should_not_inline(mh);
 953 }
 954 
 955 // ------------------------------------------------------------------
 956 // ciMethod::should_print_assembly
 957 //
 958 // Should the compiler print the generated code for this method?
 959 bool ciMethod::should_print_assembly() {
 960   check_is_loaded();
 961   VM_ENTRY_MARK;
 962   methodHandle mh(THREAD, get_Method());
 963   return CompilerOracle::should_print(mh);
 964 }
 965 
 966 // ------------------------------------------------------------------
 967 // ciMethod::break_at_execute
 968 //
 969 // Should the compiler insert a breakpoint into the generated code
 970 // method?
 971 bool ciMethod::break_at_execute() {
 972   check_is_loaded();
 973   VM_ENTRY_MARK;
 974   methodHandle mh(THREAD, get_Method());
 975   return CompilerOracle::should_break_at(mh);
 976 }
 977 
 978 // ------------------------------------------------------------------
 979 // ciMethod::has_option
 980 //
 981 bool ciMethod::has_option(const char* option) {
 982   check_is_loaded();
 983   VM_ENTRY_MARK;
 984   methodHandle mh(THREAD, get_Method());
 985   return CompilerOracle::has_option_string(mh, option);
 986 }
 987 
 988 // ------------------------------------------------------------------
 989 // ciMethod::can_be_compiled
 990 //
 991 // Have previous compilations of this method succeeded?
 992 bool ciMethod::can_be_compiled() {
 993   check_is_loaded();
 994   ciEnv* env = CURRENT_ENV;
 995   if (is_c1_compile(env->comp_level())) {
 996     return _is_c1_compilable;
 997   }
 998   return _is_c2_compilable;
 999 }
1000 
1001 // ------------------------------------------------------------------
1002 // ciMethod::set_not_compilable
1003 //
1004 // Tell the VM that this method cannot be compiled at all.
1005 void ciMethod::set_not_compilable(const char* reason) {
1006   check_is_loaded();
1007   VM_ENTRY_MARK;
1008   ciEnv* env = CURRENT_ENV;
1009   if (is_c1_compile(env->comp_level())) {
1010     _is_c1_compilable = false;
1011   } else {
1012     _is_c2_compilable = false;
1013   }
1014   get_Method()->set_not_compilable(env->comp_level(), true, reason);
1015 }
1016 
1017 // ------------------------------------------------------------------
1018 // ciMethod::can_be_osr_compiled
1019 //
1020 // Have previous compilations of this method succeeded?
1021 //
1022 // Implementation note: the VM does not currently keep track
1023 // of failed OSR compilations per bci.  The entry_bci parameter
1024 // is currently unused.
1025 bool ciMethod::can_be_osr_compiled(int entry_bci) {
1026   check_is_loaded();
1027   VM_ENTRY_MARK;
1028   ciEnv* env = CURRENT_ENV;
1029   return !get_Method()->is_not_osr_compilable(env->comp_level());
1030 }
1031 
1032 // ------------------------------------------------------------------
1033 // ciMethod::has_compiled_code
1034 bool ciMethod::has_compiled_code() {
1035   return instructions_size() > 0;
1036 }
1037 
1038 int ciMethod::comp_level() {
1039   check_is_loaded();
1040   VM_ENTRY_MARK;
1041   nmethod* nm = get_Method()->code();
1042   if (nm != NULL) return nm->comp_level();
1043   return 0;
1044 }
1045 
1046 int ciMethod::highest_osr_comp_level() {
1047   check_is_loaded();
1048   VM_ENTRY_MARK;
1049   return get_Method()->highest_osr_comp_level();
1050 }
1051 
1052 // ------------------------------------------------------------------
1053 // ciMethod::code_size_for_inlining
1054 //
1055 // Code size for inlining decisions.  This method returns a code
1056 // size of 1 for methods which has the ForceInline annotation.
1057 int ciMethod::code_size_for_inlining() {
1058   check_is_loaded();
1059   if (get_Method()->force_inline()) {
1060     return 1;
1061   }
1062   return code_size();
1063 }
1064 
1065 // ------------------------------------------------------------------
1066 // ciMethod::instructions_size
1067 //
1068 // This is a rough metric for "fat" methods, compared before inlining
1069 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1070 // junk like exception handler, stubs, and constant table, which are
1071 // not highly relevant to an inlined method.  So we use the more
1072 // specific accessor nmethod::insts_size.
1073 int ciMethod::instructions_size() {
1074   if (_instructions_size == -1) {
1075     GUARDED_VM_ENTRY(
1076                      nmethod* code = get_Method()->code();
1077                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1078                        _instructions_size = code->insts_end() - code->verified_entry_point();
1079                      } else {
1080                        _instructions_size = 0;
1081                      }
1082                      );
1083   }
1084   return _instructions_size;
1085 }
1086 
1087 // ------------------------------------------------------------------
1088 // ciMethod::log_nmethod_identity
1089 void ciMethod::log_nmethod_identity(xmlStream* log) {
1090   GUARDED_VM_ENTRY(
1091     nmethod* code = get_Method()->code();
1092     if (code != NULL) {
1093       code->log_identity(log);
1094     }
1095   )
1096 }
1097 
1098 // ------------------------------------------------------------------
1099 // ciMethod::is_not_reached
1100 bool ciMethod::is_not_reached(int bci) {
1101   check_is_loaded();
1102   VM_ENTRY_MARK;
1103   return Interpreter::is_not_reached(
1104                methodHandle(THREAD, get_Method()), bci);
1105 }
1106 
1107 // ------------------------------------------------------------------
1108 // ciMethod::was_never_executed
1109 bool ciMethod::was_executed_more_than(int times) {
1110   VM_ENTRY_MARK;
1111   return get_Method()->was_executed_more_than(times);
1112 }
1113 
1114 // ------------------------------------------------------------------
1115 // ciMethod::has_unloaded_classes_in_signature
1116 bool ciMethod::has_unloaded_classes_in_signature() {
1117   VM_ENTRY_MARK;
1118   {
1119     EXCEPTION_MARK;
1120     methodHandle m(THREAD, get_Method());
1121     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
1122     if( HAS_PENDING_EXCEPTION ) {
1123       CLEAR_PENDING_EXCEPTION;
1124       return true;     // Declare that we may have unloaded classes
1125     }
1126     return has_unloaded;
1127   }
1128 }
1129 
1130 // ------------------------------------------------------------------
1131 // ciMethod::is_klass_loaded
1132 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1133   VM_ENTRY_MARK;
1134   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1135 }
1136 
1137 // ------------------------------------------------------------------
1138 // ciMethod::check_call
1139 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1140   VM_ENTRY_MARK;
1141   {
1142     EXCEPTION_MARK;
1143     HandleMark hm(THREAD);
1144     constantPoolHandle pool (THREAD, get_Method()->constants());
1145     methodHandle spec_method;
1146     KlassHandle  spec_klass;
1147     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1148     LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);
1149     if (HAS_PENDING_EXCEPTION) {
1150       CLEAR_PENDING_EXCEPTION;
1151       return false;
1152     } else {
1153       return (spec_method->is_static() == is_static);
1154     }
1155   }
1156   return false;
1157 }
1158 
1159 // ------------------------------------------------------------------
1160 // ciMethod::print_codes
1161 //
1162 // Print the bytecodes for this method.
1163 void ciMethod::print_codes_on(outputStream* st) {
1164   check_is_loaded();
1165   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1166 }
1167 
1168 
1169 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1170   check_is_loaded(); \
1171   VM_ENTRY_MARK; \
1172   return get_Method()->flag_accessor(); \
1173 }
1174 
1175 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1176 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
1177 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1178 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1179 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1180 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }
1181 
1182 bool ciMethod::is_boxing_method() const {
1183   if (holder()->is_box_klass()) {
1184     switch (intrinsic_id()) {
1185       case vmIntrinsics::_Boolean_valueOf:
1186       case vmIntrinsics::_Byte_valueOf:
1187       case vmIntrinsics::_Character_valueOf:
1188       case vmIntrinsics::_Short_valueOf:
1189       case vmIntrinsics::_Integer_valueOf:
1190       case vmIntrinsics::_Long_valueOf:
1191       case vmIntrinsics::_Float_valueOf:
1192       case vmIntrinsics::_Double_valueOf:
1193         return true;
1194       default:
1195         return false;
1196     }
1197   }
1198   return false;
1199 }
1200 
1201 bool ciMethod::is_unboxing_method() const {
1202   if (holder()->is_box_klass()) {
1203     switch (intrinsic_id()) {
1204       case vmIntrinsics::_booleanValue:
1205       case vmIntrinsics::_byteValue:
1206       case vmIntrinsics::_charValue:
1207       case vmIntrinsics::_shortValue:
1208       case vmIntrinsics::_intValue:
1209       case vmIntrinsics::_longValue:
1210       case vmIntrinsics::_floatValue:
1211       case vmIntrinsics::_doubleValue:
1212         return true;
1213       default:
1214         return false;
1215     }
1216   }
1217   return false;
1218 }
1219 
1220 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1221 #ifdef COMPILER2
1222   if (_bcea == NULL) {
1223     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1224   }
1225   return _bcea;
1226 #else // COMPILER2
1227   ShouldNotReachHere();
1228   return NULL;
1229 #endif // COMPILER2
1230 }
1231 
1232 ciMethodBlocks  *ciMethod::get_method_blocks() {
1233   Arena *arena = CURRENT_ENV->arena();
1234   if (_method_blocks == NULL) {
1235     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1236   }
1237   return _method_blocks;
1238 }
1239 
1240 #undef FETCH_FLAG_FROM_VM
1241 
1242 void ciMethod::dump_replay_data(outputStream* st) {
1243   ASSERT_IN_VM;
1244   ResourceMark rm;
1245   Method* method = get_Method();
1246   MethodCounters* mcs = method->method_counters();
1247   Klass*  holder = method->method_holder();
1248   st->print_cr("ciMethod %s %s %s %d %d %d %d %d",
1249                holder->name()->as_quoted_ascii(),
1250                method->name()->as_quoted_ascii(),
1251                method->signature()->as_quoted_ascii(),
1252                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1253                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1254                interpreter_invocation_count(),
1255                interpreter_throwout_count(),
1256                _instructions_size);
1257 }
1258 
1259 // ------------------------------------------------------------------
1260 // ciMethod::print_codes
1261 //
1262 // Print a range of the bytecodes for this method.
1263 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1264   check_is_loaded();
1265   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1266 }
1267 
1268 // ------------------------------------------------------------------
1269 // ciMethod::print_name
1270 //
1271 // Print the name of this method, including signature and some flags.
1272 void ciMethod::print_name(outputStream* st) {
1273   check_is_loaded();
1274   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1275 }
1276 
1277 // ------------------------------------------------------------------
1278 // ciMethod::print_short_name
1279 //
1280 // Print the name of this method, without signature.
1281 void ciMethod::print_short_name(outputStream* st) {
1282   if (is_loaded()) {
1283     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1284   } else {
1285     // Fall back if method is not loaded.
1286     holder()->print_name_on(st);
1287     st->print("::");
1288     name()->print_symbol_on(st);
1289     if (WizardMode)
1290       signature()->as_symbol()->print_symbol_on(st);
1291   }
1292 }
1293 
1294 // ------------------------------------------------------------------
1295 // ciMethod::print_impl
1296 //
1297 // Implementation of the print method.
1298 void ciMethod::print_impl(outputStream* st) {
1299   ciMetadata::print_impl(st);
1300   st->print(" name=");
1301   name()->print_symbol_on(st);
1302   st->print(" holder=");
1303   holder()->print_name_on(st);
1304   st->print(" signature=");
1305   signature()->as_symbol()->print_symbol_on(st);
1306   if (is_loaded()) {
1307     st->print(" loaded=true");
1308     st->print(" arg_size=%d", arg_size());
1309     st->print(" flags=");
1310     flags().print_member_flags(st);
1311   } else {
1312     st->print(" loaded=false");
1313   }
1314 }