1 /*
   2  * Copyright (c) 1999, 2022, 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/ciSymbols.hpp"
  36 #include "ci/ciUtilities.inline.hpp"
  37 #include "compiler/abstractCompiler.hpp"
  38 #include "compiler/compilerDefinitions.inline.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/method.inline.hpp"
  47 #include "oops/oop.inline.hpp"
  48 #include "prims/methodHandles.hpp"
  49 #include "runtime/deoptimization.hpp"
  50 #include "runtime/handles.inline.hpp"
  51 #include "runtime/sharedRuntime.hpp"
  52 #include "utilities/bitMap.inline.hpp"
  53 #include "utilities/xmlstream.hpp"
  54 #ifdef COMPILER2
  55 #include "ci/bcEscapeAnalyzer.hpp"
  56 #include "ci/ciTypeFlow.hpp"
  57 #include "oops/method.hpp"
  58 #endif
  59 
  60 // ciMethod
  61 //
  62 // This class represents a Method* in the HotSpot virtual
  63 // machine.
  64 
  65 
  66 // ------------------------------------------------------------------
  67 // ciMethod::ciMethod
  68 //
  69 // Loaded method.
  70 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) :
  71   ciMetadata(h_m()),
  72   _holder(holder)
  73 {
  74   assert(h_m() != NULL, "no null method");
  75   assert(_holder->get_instanceKlass() == h_m->method_holder(), "");
  76 
  77   // These fields are always filled in in loaded methods.
  78   _flags = ciFlags(h_m->access_flags());
  79 
  80   // Easy to compute, so fill them in now.
  81   _max_stack          = h_m->max_stack();
  82   _max_locals         = h_m->max_locals();
  83   _code_size          = h_m->code_size();
  84   _handler_count      = h_m->exception_table_length();
  85   _size_of_parameters = h_m->size_of_parameters();
  86   _uses_monitors      = h_m->access_flags().has_monitor_bytecodes();
  87   _balanced_monitors  = !_uses_monitors || h_m->access_flags().is_monitor_matching();
  88   _is_c1_compilable   = !h_m->is_not_c1_compilable();
  89   _is_c2_compilable   = !h_m->is_not_c2_compilable();
  90   _can_be_parsed      = true;
  91   _has_reserved_stack_access = h_m->has_reserved_stack_access();
  92   _is_overpass        = h_m->is_overpass();
  93   // Lazy fields, filled in on demand.  Require allocation.
  94   _code               = NULL;
  95   _exception_handlers = NULL;
  96   _liveness           = NULL;
  97   _method_blocks = NULL;
  98 #if defined(COMPILER2)
  99   _flow               = NULL;
 100   _bcea               = NULL;
 101 #endif // COMPILER2
 102 
 103   // Check for blackhole intrinsic and then populate the intrinsic ID.
 104   CompilerOracle::tag_blackhole_if_possible(h_m);
 105   _intrinsic_id       = h_m->intrinsic_id();
 106 
 107   ciEnv *env = CURRENT_ENV;
 108   if (env->jvmti_can_hotswap_or_post_breakpoint()) {
 109     // 6328518 check hotswap conditions under the right lock.
 110     MutexLocker locker(Compile_lock);
 111     if (Dependencies::check_evol_method(h_m()) != NULL) {
 112       _is_c1_compilable = false;
 113       _is_c2_compilable = false;
 114       _can_be_parsed = false;
 115     }
 116   } else {
 117     DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint());
 118   }
 119 
 120   if (h_m->method_holder()->is_linked()) {
 121     _can_be_statically_bound = h_m->can_be_statically_bound();
 122     _can_omit_stack_trace = h_m->can_omit_stack_trace();
 123   } else {
 124     // Have to use a conservative value in this case.
 125     _can_be_statically_bound = false;
 126     _can_omit_stack_trace = true;
 127   }
 128 
 129   // Adjust the definition of this condition to be more useful:
 130   // %%% take these conditions into account in vtable generation
 131   if (!_can_be_statically_bound && h_m->is_private())
 132     _can_be_statically_bound = true;
 133   if (_can_be_statically_bound && h_m->is_abstract())
 134     _can_be_statically_bound = false;
 135 
 136   // generating _signature may allow GC and therefore move m.
 137   // These fields are always filled in.
 138   _name = env->get_symbol(h_m->name());
 139   ciSymbol* sig_symbol = env->get_symbol(h_m->signature());
 140   constantPoolHandle cpool(Thread::current(), h_m->constants());
 141   _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);
 142   _method_data = NULL;
 143   // Take a snapshot of these values, so they will be commensurate with the MDO.
 144   if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) {
 145     int invcnt = h_m->interpreter_invocation_count();
 146     // if the value overflowed report it as max int
 147     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
 148     _interpreter_throwout_count   = h_m->interpreter_throwout_count();
 149   } else {
 150     _interpreter_invocation_count = 0;
 151     _interpreter_throwout_count = 0;
 152   }
 153   if (_interpreter_invocation_count == 0)
 154     _interpreter_invocation_count = 1;
 155   _instructions_size = -1;
 156   if (ReplayCompiles) {
 157     ciReplay::initialize(this);
 158   }
 159 }
 160 
 161 
 162 // ------------------------------------------------------------------
 163 // ciMethod::ciMethod
 164 //
 165 // Unloaded method.
 166 ciMethod::ciMethod(ciInstanceKlass* holder,
 167                    ciSymbol*        name,
 168                    ciSymbol*        signature,
 169                    ciInstanceKlass* accessor) :
 170   ciMetadata((Metadata*)NULL),
 171   _name(                   name),
 172   _holder(                 holder),
 173   _method_data(            NULL),
 174   _method_blocks(          NULL),
 175   _intrinsic_id(           vmIntrinsics::_none),
 176   _instructions_size(-1),
 177   _can_be_statically_bound(false),
 178   _can_omit_stack_trace(true),
 179   _liveness(               NULL)
 180 #if defined(COMPILER2)
 181   ,
 182   _flow(                   NULL),
 183   _bcea(                   NULL)
 184 #endif // COMPILER2
 185 {
 186   // Usually holder and accessor are the same type but in some cases
 187   // the holder has the wrong class loader (e.g. invokedynamic call
 188   // sites) so we pass the accessor.
 189   _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);
 190 }
 191 
 192 
 193 // ------------------------------------------------------------------
 194 // ciMethod::load_code
 195 //
 196 // Load the bytecodes and exception handler table for this method.
 197 void ciMethod::load_code() {
 198   VM_ENTRY_MARK;
 199   assert(is_loaded(), "only loaded methods have code");
 200 
 201   Method* me = get_Method();
 202   Arena* arena = CURRENT_THREAD_ENV->arena();
 203 
 204   // Load the bytecodes.
 205   _code = (address)arena->Amalloc(code_size());
 206   memcpy(_code, me->code_base(), code_size());
 207 
 208 #if INCLUDE_JVMTI
 209   // Revert any breakpoint bytecodes in ci's copy
 210   if (me->number_of_breakpoints() > 0) {
 211     BreakpointInfo* bp = me->method_holder()->breakpoints();
 212     for (; bp != NULL; bp = bp->next()) {
 213       if (bp->match(me)) {
 214         code_at_put(bp->bci(), bp->orig_bytecode());
 215       }
 216     }
 217   }
 218 #endif
 219 
 220   // And load the exception table.
 221   ExceptionTable exc_table(me);
 222 
 223   // Allocate one extra spot in our list of exceptions.  This
 224   // last entry will be used to represent the possibility that
 225   // an exception escapes the method.  See ciExceptionHandlerStream
 226   // for details.
 227   _exception_handlers =
 228     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
 229                                          * (_handler_count + 1));
 230   if (_handler_count > 0) {
 231     for (int i=0; i<_handler_count; i++) {
 232       _exception_handlers[i] = new (arena) ciExceptionHandler(
 233                                 holder(),
 234             /* start    */      exc_table.start_pc(i),
 235             /* limit    */      exc_table.end_pc(i),
 236             /* goto pc  */      exc_table.handler_pc(i),
 237             /* cp index */      exc_table.catch_type_index(i));
 238     }
 239   }
 240 
 241   // Put an entry at the end of our list to represent the possibility
 242   // of exceptional exit.
 243   _exception_handlers[_handler_count] =
 244     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
 245 
 246   if (CIPrintMethodCodes) {
 247     print_codes();
 248   }
 249 }
 250 
 251 
 252 // ------------------------------------------------------------------
 253 // ciMethod::has_linenumber_table
 254 //
 255 // length unknown until decompression
 256 bool    ciMethod::has_linenumber_table() const {
 257   check_is_loaded();
 258   VM_ENTRY_MARK;
 259   return get_Method()->has_linenumber_table();
 260 }
 261 
 262 
 263 // ------------------------------------------------------------------
 264 // ciMethod::line_number_from_bci
 265 int ciMethod::line_number_from_bci(int bci) const {
 266   check_is_loaded();
 267   VM_ENTRY_MARK;
 268   return get_Method()->line_number_from_bci(bci);
 269 }
 270 
 271 
 272 // ------------------------------------------------------------------
 273 // ciMethod::vtable_index
 274 //
 275 // Get the position of this method's entry in the vtable, if any.
 276 int ciMethod::vtable_index() {
 277   check_is_loaded();
 278   assert(holder()->is_linked(), "must be linked");
 279   VM_ENTRY_MARK;
 280   return get_Method()->vtable_index();
 281 }
 282 
 283 // ------------------------------------------------------------------
 284 // ciMethod::uses_balanced_monitors
 285 //
 286 // Does this method use monitors in a strict stack-disciplined manner?
 287 bool ciMethod::has_balanced_monitors() {
 288   check_is_loaded();
 289   if (_balanced_monitors) return true;
 290 
 291   // Analyze the method to see if monitors are used properly.
 292   VM_ENTRY_MARK;
 293   methodHandle method(THREAD, get_Method());
 294   assert(method->has_monitor_bytecodes(), "should have checked this");
 295 
 296   // Check to see if a previous compilation computed the
 297   // monitor-matching analysis.
 298   if (method->guaranteed_monitor_matching()) {
 299     _balanced_monitors = true;
 300     return true;
 301   }
 302 
 303   {
 304     ExceptionMark em(THREAD);
 305     ResourceMark rm(THREAD);
 306     GeneratePairingInfo gpi(method);
 307     if (!gpi.compute_map(THREAD)) {
 308       fatal("Unrecoverable verification or out-of-memory error");
 309     }
 310     if (!gpi.monitor_safe()) {
 311       return false;
 312     }
 313     method->set_guaranteed_monitor_matching();
 314     _balanced_monitors = true;
 315   }
 316   return true;
 317 }
 318 
 319 
 320 // ------------------------------------------------------------------
 321 // ciMethod::get_flow_analysis
 322 ciTypeFlow* ciMethod::get_flow_analysis() {
 323 #if defined(COMPILER2)
 324   if (_flow == NULL) {
 325     ciEnv* env = CURRENT_ENV;
 326     _flow = new (env->arena()) ciTypeFlow(env, this);
 327     _flow->do_flow();
 328   }
 329   return _flow;
 330 #else // COMPILER2
 331   ShouldNotReachHere();
 332   return NULL;
 333 #endif // COMPILER2
 334 }
 335 
 336 
 337 // ------------------------------------------------------------------
 338 // ciMethod::get_osr_flow_analysis
 339 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
 340 #if defined(COMPILER2)
 341   // OSR entry points are always place after a call bytecode of some sort
 342   assert(osr_bci >= 0, "must supply valid OSR entry point");
 343   ciEnv* env = CURRENT_ENV;
 344   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
 345   flow->do_flow();
 346   return flow;
 347 #else // COMPILER2
 348   ShouldNotReachHere();
 349   return NULL;
 350 #endif // COMPILER2
 351 }
 352 
 353 // ------------------------------------------------------------------
 354 // ciMethod::raw_liveness_at_bci
 355 //
 356 // Which local variables are live at a specific bci?
 357 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {
 358   check_is_loaded();
 359   if (_liveness == NULL) {
 360     // Create the liveness analyzer.
 361     Arena* arena = CURRENT_ENV->arena();
 362     _liveness = new (arena) MethodLiveness(arena, this);
 363     _liveness->compute_liveness();
 364   }
 365   return _liveness->get_liveness_at(bci);
 366 }
 367 
 368 // ------------------------------------------------------------------
 369 // ciMethod::liveness_at_bci
 370 //
 371 // Which local variables are live at a specific bci?  When debugging
 372 // will return true for all locals in some cases to improve debug
 373 // information.
 374 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
 375   if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) {
 376     // Keep all locals live for the user's edification and amusement.
 377     MethodLivenessResult result(_max_locals);
 378     result.set_range(0, _max_locals);
 379     result.set_is_valid();
 380     return result;
 381   }
 382   return raw_liveness_at_bci(bci);
 383 }
 384 
 385 // ciMethod::live_local_oops_at_bci
 386 //
 387 // find all the live oops in the locals array for a particular bci
 388 // Compute what the interpreter believes by using the interpreter
 389 // oopmap generator. This is used as a double check during osr to
 390 // guard against conservative result from MethodLiveness making us
 391 // think a dead oop is live.  MethodLiveness is conservative in the
 392 // sense that it may consider locals to be live which cannot be live,
 393 // like in the case where a local could contain an oop or  a primitive
 394 // along different paths.  In that case the local must be dead when
 395 // those paths merge. Since the interpreter's viewpoint is used when
 396 // gc'ing an interpreter frame we need to use its viewpoint  during
 397 // OSR when loading the locals.
 398 
 399 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) {
 400   VM_ENTRY_MARK;
 401   InterpreterOopMap mask;
 402   OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask);
 403   int mask_size = max_locals();
 404   ResourceBitMap result(mask_size);
 405   int i;
 406   for (i = 0; i < mask_size ; i++ ) {
 407     if (mask.is_oop(i)) result.set_bit(i);
 408   }
 409   return result;
 410 }
 411 
 412 
 413 #ifdef COMPILER1
 414 // ------------------------------------------------------------------
 415 // ciMethod::bci_block_start
 416 //
 417 // Marks all bcis where a new basic block starts
 418 const BitMap& ciMethod::bci_block_start() {
 419   check_is_loaded();
 420   if (_liveness == NULL) {
 421     // Create the liveness analyzer.
 422     Arena* arena = CURRENT_ENV->arena();
 423     _liveness = new (arena) MethodLiveness(arena, this);
 424     _liveness->compute_liveness();
 425   }
 426 
 427   return _liveness->get_bci_block_start();
 428 }
 429 #endif // COMPILER1
 430 
 431 
 432 // ------------------------------------------------------------------
 433 // ciMethod::check_overflow
 434 //
 435 // Check whether the profile counter is overflowed and adjust if true.
 436 // For invoke* it will turn negative values into max_jint,
 437 // and for checkcast/aastore/instanceof turn positive values into min_jint.
 438 int ciMethod::check_overflow(int c, Bytecodes::Code code) {
 439   switch (code) {
 440     case Bytecodes::_aastore:    // fall-through
 441     case Bytecodes::_checkcast:  // fall-through
 442     case Bytecodes::_instanceof: {
 443       return (c > 0 ? min_jint : c); // always non-positive
 444     }
 445     default: {
 446       assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code));
 447       return (c < 0 ? max_jint : c); // always non-negative
 448     }
 449   }
 450 }
 451 
 452 
 453 // ------------------------------------------------------------------
 454 // ciMethod::call_profile_at_bci
 455 //
 456 // Get the ciCallProfile for the invocation of this method.
 457 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
 458 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
 459   ResourceMark rm;
 460   ciCallProfile result;
 461   if (method_data() != NULL && method_data()->is_mature()) {
 462     ciProfileData* data = method_data()->bci_to_data(bci);
 463     if (data != NULL && data->is_CounterData()) {
 464       // Every profiled call site has a counter.
 465       int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci));
 466 
 467       if (!data->is_ReceiverTypeData()) {
 468         result._receiver_count[0] = 0;  // that's a definite zero
 469       } else { // ReceiverTypeData is a subclass of CounterData
 470         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
 471         // In addition, virtual call sites have receiver type information
 472         int receivers_count_total = 0;
 473         int morphism = 0;
 474         // Precompute morphism for the possible fixup
 475         for (uint i = 0; i < call->row_limit(); i++) {
 476           ciKlass* receiver = call->receiver(i);
 477           if (receiver == NULL)  continue;
 478           morphism++;
 479         }
 480         int epsilon = 0;
 481         // For a call, it is assumed that either the type of the receiver(s)
 482         // is recorded or an associated counter is incremented, but not both. With
 483         // tiered compilation, however, both can happen due to the interpreter and
 484         // C1 profiling invocations differently. Address that inconsistency here.
 485         if (morphism == 1 && count > 0) {
 486           epsilon = count;
 487           count = 0;
 488         }
 489         for (uint i = 0; i < call->row_limit(); i++) {
 490           ciKlass* receiver = call->receiver(i);
 491           if (receiver == NULL)  continue;
 492           int rcount = saturated_add(call->receiver_count(i), epsilon);
 493           if (rcount == 0) rcount = 1; // Should be valid value
 494           receivers_count_total = saturated_add(receivers_count_total, rcount);
 495           // Add the receiver to result data.
 496           result.add_receiver(receiver, rcount);
 497           // If we extend profiling to record methods,
 498           // we will set result._method also.
 499         }
 500         // Determine call site's morphism.
 501         // The call site count is 0 with known morphism (only 1 or 2 receivers)
 502         // or < 0 in the case of a type check failure for checkcast, aastore, instanceof.
 503         // The call site count is > 0 in the case of a polymorphic virtual call.
 504         if (morphism > 0 && morphism == result._limit) {
 505            // The morphism <= MorphismLimit.
 506            if ((morphism <  ciCallProfile::MorphismLimit) ||
 507                (morphism == ciCallProfile::MorphismLimit && count == 0)) {
 508 #ifdef ASSERT
 509              if (count > 0) {
 510                this->print_short_name(tty);
 511                tty->print_cr(" @ bci:%d", bci);
 512                this->print_codes();
 513                assert(false, "this call site should not be polymorphic");
 514              }
 515 #endif
 516              result._morphism = morphism;
 517            }
 518         }
 519         // Make the count consistent if this is a call profile. If count is
 520         // zero or less, presume that this is a typecheck profile and
 521         // do nothing.  Otherwise, increase count to be the sum of all
 522         // receiver's counts.
 523         if (count >= 0) {
 524           count = saturated_add(count, receivers_count_total);
 525         }
 526       }
 527       result._count = count;
 528     }
 529   }
 530   return result;
 531 }
 532 
 533 // ------------------------------------------------------------------
 534 // Add new receiver and sort data by receiver's profile count.
 535 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
 536   // Add new receiver and sort data by receiver's counts when we have space
 537   // for it otherwise replace the less called receiver (less called receiver
 538   // is placed to the last array element which is not used).
 539   // First array's element contains most called receiver.
 540   int i = _limit;
 541   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
 542     _receiver[i] = _receiver[i-1];
 543     _receiver_count[i] = _receiver_count[i-1];
 544   }
 545   _receiver[i] = receiver;
 546   _receiver_count[i] = receiver_count;
 547   if (_limit < MorphismLimit) _limit++;
 548 }
 549 
 550 
 551 void ciMethod::assert_virtual_call_type_ok(int bci) {
 552   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||
 553          java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 554 }
 555 
 556 void ciMethod::assert_call_type_ok(int bci) {
 557   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||
 558          java_code_at_bci(bci) == Bytecodes::_invokespecial ||
 559          java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)));
 560 }
 561 
 562 /**
 563  * Check whether profiling provides a type for the argument i to the
 564  * call at bci bci
 565  *
 566  * @param [in]bci         bci of the call
 567  * @param [in]i           argument number
 568  * @param [out]type       profiled type of argument, NULL if none
 569  * @param [out]ptr_kind   whether always null, never null or maybe null
 570  * @return                true if profiling exists
 571  *
 572  */
 573 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
 574   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 575     ciProfileData* data = method_data()->bci_to_data(bci);
 576     if (data != NULL) {
 577       if (data->is_VirtualCallTypeData()) {
 578         assert_virtual_call_type_ok(bci);
 579         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 580         if (i >= call->number_of_arguments()) {
 581           return false;
 582         }
 583         type = call->valid_argument_type(i);
 584         ptr_kind = call->argument_ptr_kind(i);
 585         return true;
 586       } else if (data->is_CallTypeData()) {
 587         assert_call_type_ok(bci);
 588         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 589         if (i >= call->number_of_arguments()) {
 590           return false;
 591         }
 592         type = call->valid_argument_type(i);
 593         ptr_kind = call->argument_ptr_kind(i);
 594         return true;
 595       }
 596     }
 597   }
 598   return false;
 599 }
 600 
 601 /**
 602  * Check whether profiling provides a type for the return value from
 603  * the call at bci bci
 604  *
 605  * @param [in]bci         bci of the call
 606  * @param [out]type       profiled type of argument, NULL if none
 607  * @param [out]ptr_kind   whether always null, never null or maybe null
 608  * @return                true if profiling exists
 609  *
 610  */
 611 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) {
 612   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {
 613     ciProfileData* data = method_data()->bci_to_data(bci);
 614     if (data != NULL) {
 615       if (data->is_VirtualCallTypeData()) {
 616         assert_virtual_call_type_ok(bci);
 617         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();
 618         if (call->has_return()) {
 619           type = call->valid_return_type();
 620           ptr_kind = call->return_ptr_kind();
 621           return true;
 622         }
 623       } else if (data->is_CallTypeData()) {
 624         assert_call_type_ok(bci);
 625         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();
 626         if (call->has_return()) {
 627           type = call->valid_return_type();
 628           ptr_kind = call->return_ptr_kind();
 629         }
 630         return true;
 631       }
 632     }
 633   }
 634   return false;
 635 }
 636 
 637 /**
 638  * Check whether profiling provides a type for the parameter i
 639  *
 640  * @param [in]i           parameter number
 641  * @param [out]type       profiled type of parameter, NULL if none
 642  * @param [out]ptr_kind   whether always null, never null or maybe null
 643  * @return                true if profiling exists
 644  *
 645  */
 646 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) {
 647   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {
 648     ciParametersTypeData* parameters = method_data()->parameters_type_data();
 649     if (parameters != NULL && i < parameters->number_of_parameters()) {
 650       type = parameters->valid_parameter_type(i);
 651       ptr_kind = parameters->parameter_ptr_kind(i);
 652       return true;
 653     }
 654   }
 655   return false;
 656 }
 657 
 658 bool ciMethod::array_access_profiled_type(int bci, ciKlass*& array_type, ciKlass*& element_type, ProfilePtrKind& element_ptr, bool &flat_array, bool &null_free_array) {
 659   if (method_data() != NULL && method_data()->is_mature()) {
 660     ciProfileData* data = method_data()->bci_to_data(bci);
 661     if (data != NULL && data->is_ArrayLoadStoreData()) {
 662       ciArrayLoadStoreData* array_access = (ciArrayLoadStoreData*)data->as_ArrayLoadStoreData();
 663       array_type = array_access->array()->valid_type();
 664       element_type = array_access->element()->valid_type();
 665       element_ptr = array_access->element()->ptr_kind();
 666       flat_array = array_access->flat_array();
 667       null_free_array = array_access->null_free_array();
 668       return true;
 669     }
 670   }
 671   return false;
 672 }
 673 
 674 bool ciMethod::acmp_profiled_type(int bci, ciKlass*& left_type, ciKlass*& right_type, ProfilePtrKind& left_ptr, ProfilePtrKind& right_ptr, bool &left_inline_type, bool &right_inline_type) {
 675   if (method_data() != NULL && method_data()->is_mature()) {
 676     ciProfileData* data = method_data()->bci_to_data(bci);
 677     if (data != NULL && data->is_ACmpData()) {
 678       ciACmpData* acmp = (ciACmpData*)data->as_ACmpData();
 679       left_type = acmp->left()->valid_type();
 680       right_type = acmp->right()->valid_type();
 681       left_ptr = acmp->left()->ptr_kind();
 682       right_ptr = acmp->right()->ptr_kind();
 683       left_inline_type = acmp->left_inline_type();
 684       right_inline_type = acmp->right_inline_type();
 685       return true;
 686     }
 687   }
 688   return false;
 689 }
 690 
 691 
 692 // ------------------------------------------------------------------
 693 // ciMethod::find_monomorphic_target
 694 //
 695 // Given a certain calling environment, find the monomorphic target
 696 // for the call.  Return NULL if the call is not monomorphic in
 697 // its calling environment, or if there are only abstract methods.
 698 // The returned method is never abstract.
 699 // Note: If caller uses a non-null result, it must inform dependencies
 700 // via assert_unique_concrete_method or assert_leaf_type.
 701 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 702                                             ciInstanceKlass* callee_holder,
 703                                             ciInstanceKlass* actual_recv,
 704                                             bool check_access) {
 705   check_is_loaded();
 706 
 707   if (actual_recv->is_interface()) {
 708     // %%% We cannot trust interface types, yet.  See bug 6312651.
 709     return NULL;
 710   }
 711 
 712   ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */);
 713   if (root_m == NULL) {
 714     // Something went wrong looking up the actual receiver method.
 715     return NULL;
 716   }
 717 
 718   // Make certain quick checks even if UseCHA is false.
 719 
 720   // Is it private or final?
 721   if (root_m->can_be_statically_bound()) {
 722     assert(!root_m->is_abstract(), "sanity");
 723     return root_m;
 724   }
 725 
 726   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
 727     // Easy case.  There is no other place to put a method, so don't bother
 728     // to go through the VM_ENTRY_MARK and all the rest.
 729     if (root_m->is_abstract()) {
 730       return NULL;
 731     }
 732     return root_m;
 733   }
 734 
 735   // Array methods (clone, hashCode, etc.) are always statically bound.
 736   // If we were to see an array type here, we'd return root_m.
 737   // However, this method processes only ciInstanceKlasses.  (See 4962591.)
 738   // The inline_native_clone intrinsic narrows Object to T[] properly,
 739   // so there is no need to do the same job here.
 740 
 741   if (!UseCHA)  return NULL;
 742 
 743   VM_ENTRY_MARK;
 744 
 745   methodHandle target;
 746   {
 747     MutexLocker locker(Compile_lock);
 748     InstanceKlass* context = actual_recv->get_instanceKlass();
 749     if (UseVtableBasedCHA) {
 750       target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context,
 751                                                                               root_m->get_Method(),
 752                                                                               callee_holder->get_Klass(),
 753                                                                               this->get_Method()));
 754     } else {
 755       if (root_m->is_abstract()) {
 756         return NULL; // not supported
 757       }
 758       target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context, root_m->get_Method()));
 759     }
 760     assert(target() == NULL || !target()->is_abstract(), "not allowed");
 761     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
 762   }
 763 
 764 #ifndef PRODUCT
 765   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {
 766     tty->print("found a non-root unique target method");
 767     tty->print_cr("  context = %s", actual_recv->get_Klass()->external_name());
 768     tty->print("  method  = ");
 769     target->print_short_name(tty);
 770     tty->cr();
 771   }
 772 #endif //PRODUCT
 773 
 774   if (target() == NULL) {
 775     return NULL;
 776   }
 777   if (target() == root_m->get_Method()) {
 778     return root_m;
 779   }
 780   if (!root_m->is_public() &&
 781       !root_m->is_protected()) {
 782     // If we are going to reason about inheritance, it's easiest
 783     // if the method in question is public, protected, or private.
 784     // If the answer is not root_m, it is conservatively correct
 785     // to return NULL, even if the CHA encountered irrelevant
 786     // methods in other packages.
 787     // %%% TO DO: Work out logic for package-private methods
 788     // with the same name but different vtable indexes.
 789     return NULL;
 790   }
 791   return CURRENT_THREAD_ENV->get_method(target());
 792 }
 793 
 794 // ------------------------------------------------------------------
 795 // ciMethod::can_be_statically_bound
 796 //
 797 // Tries to determine whether a method can be statically bound in some context.
 798 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const {
 799   return (holder() == context) && can_be_statically_bound();
 800 }
 801 
 802 // ------------------------------------------------------------------
 803 // ciMethod::can_omit_stack_trace
 804 //
 805 // Tries to determine whether a method can omit stack trace in throw in compiled code.
 806 bool ciMethod::can_omit_stack_trace() const {
 807   if (!StackTraceInThrowable) {
 808     return true; // stack trace is switched off.
 809   }
 810   if (!OmitStackTraceInFastThrow) {
 811     return false; // Have to provide stack trace.
 812   }
 813   return _can_omit_stack_trace;
 814 }
 815 
 816 // ------------------------------------------------------------------
 817 // ciMethod::resolve_invoke
 818 //
 819 // Given a known receiver klass, find the target for the call.
 820 // Return NULL if the call has no target or the target is abstract.
 821 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) {
 822   check_is_loaded();
 823   VM_ENTRY_MARK;
 824 
 825   Klass* caller_klass = caller->get_Klass();
 826   Klass* recv         = exact_receiver->get_Klass();
 827   Klass* resolved     = holder()->get_Klass();
 828   Symbol* h_name      = name()->get_symbol();
 829   Symbol* h_signature = signature()->get_symbol();
 830 
 831   LinkInfo link_info(resolved, h_name, h_signature, caller_klass,
 832                      check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip,
 833                      check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip);
 834   Method* m = NULL;
 835   // Only do exact lookup if receiver klass has been linked.  Otherwise,
 836   // the vtable has not been setup, and the LinkResolver will fail.
 837   if (recv->is_array_klass()
 838        ||
 839       (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) {
 840     if (holder()->is_interface()) {
 841       m = LinkResolver::resolve_interface_call_or_null(recv, link_info);
 842     } else {
 843       m = LinkResolver::resolve_virtual_call_or_null(recv, link_info);
 844     }
 845   }
 846 
 847   if (m == NULL) {
 848     // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
 849     return NULL;
 850   }
 851 
 852   ciMethod* result = this;
 853   if (m != get_Method()) {
 854     result = CURRENT_THREAD_ENV->get_method(m);
 855   }
 856 
 857   if (result->is_abstract() && !allow_abstract) {
 858     // Don't return abstract methods because they aren't optimizable or interesting.
 859     return NULL;
 860   }
 861   return result;
 862 }
 863 
 864 // ------------------------------------------------------------------
 865 // ciMethod::resolve_vtable_index
 866 //
 867 // Given a known receiver klass, find the vtable index for the call.
 868 // Return Method::invalid_vtable_index if the vtable_index is unknown.
 869 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
 870    check_is_loaded();
 871 
 872    int vtable_index = Method::invalid_vtable_index;
 873    // Only do lookup if receiver klass has been linked.  Otherwise,
 874    // the vtable has not been setup, and the LinkResolver will fail.
 875    if (!receiver->is_interface()
 876        && (!receiver->is_instance_klass() ||
 877            receiver->as_instance_klass()->is_linked())) {
 878      VM_ENTRY_MARK;
 879 
 880      Klass* caller_klass = caller->get_Klass();
 881      Klass* recv         = receiver->get_Klass();
 882      Symbol* h_name = name()->get_symbol();
 883      Symbol* h_signature = signature()->get_symbol();
 884 
 885      LinkInfo link_info(recv, h_name, h_signature, caller_klass);
 886      vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info);
 887      if (vtable_index == Method::nonvirtual_vtable_index) {
 888        // A statically bound method.  Return "no such index".
 889        vtable_index = Method::invalid_vtable_index;
 890      }
 891    }
 892 
 893    return vtable_index;
 894 }
 895 
 896 // ------------------------------------------------------------------
 897 // ciMethod::get_field_at_bci
 898 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {
 899   ciBytecodeStream iter(this);
 900   iter.reset_to_bci(bci);
 901   iter.next();
 902   return iter.get_field(will_link);
 903 }
 904 
 905 // ------------------------------------------------------------------
 906 // ciMethod::get_method_at_bci
 907 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {
 908   ciBytecodeStream iter(this);
 909   iter.reset_to_bci(bci);
 910   iter.next();
 911   return iter.get_method(will_link, declared_signature);
 912 }
 913 
 914 // ------------------------------------------------------------------
 915 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) {
 916   ciBytecodeStream iter(this);
 917   iter.reset_to_bci(bci);
 918   iter.next();
 919   return iter.get_declared_method_holder();
 920 }
 921 
 922 // ------------------------------------------------------------------
 923 // Adjust a CounterData count to be commensurate with
 924 // interpreter_invocation_count.  If the MDO exists for
 925 // only 25% of the time the method exists, then the
 926 // counts in the MDO should be scaled by 4X, so that
 927 // they can be usefully and stably compared against the
 928 // invocation counts in methods.
 929 int ciMethod::scale_count(int count, float prof_factor) {
 930   if (count > 0 && method_data() != NULL) {
 931     int counter_life = method_data()->invocation_count();
 932     int method_life = interpreter_invocation_count();
 933     if (method_life < counter_life) { // may happen because of the snapshot timing
 934       method_life = counter_life;
 935     }
 936     if (counter_life > 0) {
 937       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
 938       count = (count > 0) ? count : 1;
 939     } else {
 940       count = 1;
 941     }
 942   }
 943   return count;
 944 }
 945 
 946 
 947 // ------------------------------------------------------------------
 948 // ciMethod::is_special_get_caller_class_method
 949 //
 950 bool ciMethod::is_ignored_by_security_stack_walk() const {
 951   check_is_loaded();
 952   VM_ENTRY_MARK;
 953   return get_Method()->is_ignored_by_security_stack_walk();
 954 }
 955 
 956 // ------------------------------------------------------------------
 957 // ciMethod::needs_clinit_barrier
 958 //
 959 bool ciMethod::needs_clinit_barrier() const {
 960   check_is_loaded();
 961   return is_static() && !holder()->is_initialized();
 962 }
 963 
 964 // ------------------------------------------------------------------
 965 // invokedynamic support
 966 
 967 // ------------------------------------------------------------------
 968 // ciMethod::is_method_handle_intrinsic
 969 //
 970 // Return true if the method is an instance of the JVM-generated
 971 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.
 972 bool ciMethod::is_method_handle_intrinsic() const {
 973   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 974   return (MethodHandles::is_signature_polymorphic(iid) &&
 975           MethodHandles::is_signature_polymorphic_intrinsic(iid));
 976 }
 977 
 978 // ------------------------------------------------------------------
 979 // ciMethod::is_compiled_lambda_form
 980 //
 981 // Return true if the method is a generated MethodHandle adapter.
 982 // These are built by Java code.
 983 bool ciMethod::is_compiled_lambda_form() const {
 984   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
 985   return iid == vmIntrinsics::_compiledLambdaForm;
 986 }
 987 
 988 // ------------------------------------------------------------------
 989 // ciMethod::is_object_constructor
 990 //
 991 bool ciMethod::is_object_constructor() const {
 992    return (name() == ciSymbols::object_initializer_name()
 993            && signature()->return_type()->is_void());
 994    // Note:  We can't test is_static, because that would
 995    // require the method to be loaded.  Sometimes it isn't.
 996 }
 997 
 998 // ------------------------------------------------------------------
 999 // ciMethod::is_static_init_factory
1000 //
1001 bool ciMethod::is_static_init_factory() const {
1002    return (name() == ciSymbols::object_initializer_name()
1003            && !signature()->return_type()->is_void());
1004    // Note:  We can't test is_static, because that would
1005    // require the method to be loaded.  Sometimes it isn't.
1006 }
1007 
1008 // ------------------------------------------------------------------
1009 // ciMethod::has_member_arg
1010 //
1011 // Return true if the method is a linker intrinsic like _linkToVirtual.
1012 // These are built by the JVM.
1013 bool ciMethod::has_member_arg() const {
1014   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded
1015   return (MethodHandles::is_signature_polymorphic(iid) &&
1016           MethodHandles::has_member_arg(iid));
1017 }
1018 
1019 // ------------------------------------------------------------------
1020 // ciMethod::ensure_method_data
1021 //
1022 // Generate new MethodData* objects at compile time.
1023 // Return true if allocation was successful or no MDO is required.
1024 bool ciMethod::ensure_method_data(const methodHandle& h_m) {
1025   EXCEPTION_CONTEXT;
1026   if (is_native() || is_abstract() || h_m()->is_accessor()) {
1027     return true;
1028   }
1029   if (h_m()->method_data() == NULL) {
1030     Method::build_profiling_method_data(h_m, THREAD);
1031     if (HAS_PENDING_EXCEPTION) {
1032       CLEAR_PENDING_EXCEPTION;
1033     }
1034   }
1035   if (h_m()->method_data() != NULL) {
1036     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1037     return _method_data->load_data();
1038   } else {
1039     _method_data = CURRENT_ENV->get_empty_methodData();
1040     return false;
1041   }
1042 }
1043 
1044 // public, retroactive version
1045 bool ciMethod::ensure_method_data() {
1046   bool result = true;
1047   if (_method_data == NULL || _method_data->is_empty()) {
1048     GUARDED_VM_ENTRY({
1049       methodHandle mh(Thread::current(), get_Method());
1050       result = ensure_method_data(mh);
1051     });
1052   }
1053   return result;
1054 }
1055 
1056 
1057 // ------------------------------------------------------------------
1058 // ciMethod::method_data
1059 //
1060 ciMethodData* ciMethod::method_data() {
1061   if (_method_data != NULL) {
1062     return _method_data;
1063   }
1064   VM_ENTRY_MARK;
1065   ciEnv* env = CURRENT_ENV;
1066   Thread* my_thread = JavaThread::current();
1067   methodHandle h_m(my_thread, get_Method());
1068 
1069   if (h_m()->method_data() != NULL) {
1070     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());
1071     _method_data->load_data();
1072   } else {
1073     _method_data = CURRENT_ENV->get_empty_methodData();
1074   }
1075   return _method_data;
1076 
1077 }
1078 
1079 // ------------------------------------------------------------------
1080 // ciMethod::method_data_or_null
1081 // Returns a pointer to ciMethodData if MDO exists on the VM side,
1082 // NULL otherwise.
1083 ciMethodData* ciMethod::method_data_or_null() {
1084   ciMethodData *md = method_data();
1085   if (md->is_empty()) {
1086     return NULL;
1087   }
1088   return md;
1089 }
1090 
1091 // ------------------------------------------------------------------
1092 // ciMethod::ensure_method_counters
1093 //
1094 MethodCounters* ciMethod::ensure_method_counters() {
1095   check_is_loaded();
1096   VM_ENTRY_MARK;
1097   methodHandle mh(THREAD, get_Method());
1098   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);
1099   return method_counters;
1100 }
1101 
1102 // ------------------------------------------------------------------
1103 // ciMethod::has_option
1104 //
1105 bool ciMethod::has_option(enum CompileCommand option) {
1106   check_is_loaded();
1107   VM_ENTRY_MARK;
1108   methodHandle mh(THREAD, get_Method());
1109   return CompilerOracle::has_option(mh, option);
1110 }
1111 
1112 // ------------------------------------------------------------------
1113 // ciMethod::has_option_value
1114 //
1115 bool ciMethod::has_option_value(enum CompileCommand option, double& value) {
1116   check_is_loaded();
1117   VM_ENTRY_MARK;
1118   methodHandle mh(THREAD, get_Method());
1119   return CompilerOracle::has_option_value(mh, option, value);
1120 }
1121 // ------------------------------------------------------------------
1122 // ciMethod::can_be_compiled
1123 //
1124 // Have previous compilations of this method succeeded?
1125 bool ciMethod::can_be_compiled() {
1126   check_is_loaded();
1127   ciEnv* env = CURRENT_ENV;
1128   if (is_c1_compile(env->comp_level())) {
1129     return _is_c1_compilable;
1130   }
1131   return _is_c2_compilable;
1132 }
1133 
1134 // ------------------------------------------------------------------
1135 // ciMethod::has_compiled_code
1136 bool ciMethod::has_compiled_code() {
1137   return instructions_size() > 0;
1138 }
1139 
1140 int ciMethod::highest_osr_comp_level() {
1141   check_is_loaded();
1142   VM_ENTRY_MARK;
1143   return get_Method()->highest_osr_comp_level();
1144 }
1145 
1146 // ------------------------------------------------------------------
1147 // ciMethod::code_size_for_inlining
1148 //
1149 // Code size for inlining decisions.  This method returns a code
1150 // size of 1 for methods which has the ForceInline annotation.
1151 int ciMethod::code_size_for_inlining() {
1152   check_is_loaded();
1153   if (get_Method()->force_inline()) {
1154     return 1;
1155   }
1156   return code_size();
1157 }
1158 
1159 // ------------------------------------------------------------------
1160 // ciMethod::instructions_size
1161 //
1162 // This is a rough metric for "fat" methods, compared before inlining
1163 // with InlineSmallCode.  The CodeBlob::code_size accessor includes
1164 // junk like exception handler, stubs, and constant table, which are
1165 // not highly relevant to an inlined method.  So we use the more
1166 // specific accessor nmethod::insts_size.
1167 int ciMethod::instructions_size() {
1168   if (_instructions_size == -1) {
1169     GUARDED_VM_ENTRY(
1170                      CompiledMethod* code = get_Method()->code();
1171                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {
1172                        _instructions_size = code->insts_end() - code->verified_entry_point();
1173                      } else {
1174                        _instructions_size = 0;
1175                      }
1176                      );
1177   }
1178   return _instructions_size;
1179 }
1180 
1181 // ------------------------------------------------------------------
1182 // ciMethod::log_nmethod_identity
1183 void ciMethod::log_nmethod_identity(xmlStream* log) {
1184   GUARDED_VM_ENTRY(
1185     CompiledMethod* code = get_Method()->code();
1186     if (code != NULL) {
1187       code->log_identity(log);
1188     }
1189   )
1190 }
1191 
1192 // ------------------------------------------------------------------
1193 // ciMethod::is_not_reached
1194 bool ciMethod::is_not_reached(int bci) {
1195   check_is_loaded();
1196   VM_ENTRY_MARK;
1197   return Interpreter::is_not_reached(
1198                methodHandle(THREAD, get_Method()), bci);
1199 }
1200 
1201 // ------------------------------------------------------------------
1202 // ciMethod::was_never_executed
1203 bool ciMethod::was_executed_more_than(int times) {
1204   VM_ENTRY_MARK;
1205   return get_Method()->was_executed_more_than(times);
1206 }
1207 
1208 // ------------------------------------------------------------------
1209 // ciMethod::has_unloaded_classes_in_signature
1210 bool ciMethod::has_unloaded_classes_in_signature() {
1211   VM_ENTRY_MARK;
1212   {
1213     ExceptionMark em(THREAD);
1214     methodHandle m(THREAD, get_Method());
1215     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, thread);
1216     if( HAS_PENDING_EXCEPTION ) {
1217       CLEAR_PENDING_EXCEPTION;
1218       return true;     // Declare that we may have unloaded classes
1219     }
1220     return has_unloaded;
1221   }
1222 }
1223 
1224 // ------------------------------------------------------------------
1225 // ciMethod::is_klass_loaded
1226 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
1227   VM_ENTRY_MARK;
1228   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);
1229 }
1230 
1231 // ------------------------------------------------------------------
1232 // ciMethod::check_call
1233 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
1234   // This method is used only in C2 from InlineTree::ok_to_inline,
1235   // and is only used under -Xcomp.
1236   // It appears to fail when applied to an invokeinterface call site.
1237   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.
1238   VM_ENTRY_MARK;
1239   {
1240     ExceptionMark em(THREAD);
1241     HandleMark hm(THREAD);
1242     constantPoolHandle pool (THREAD, get_Method()->constants());
1243     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);
1244     Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD);
1245     if (HAS_PENDING_EXCEPTION) {
1246       CLEAR_PENDING_EXCEPTION;
1247       return false;
1248     } else {
1249       return (spec_method->is_static() == is_static);
1250     }
1251   }
1252   return false;
1253 }
1254 // ------------------------------------------------------------------
1255 // ciMethod::print_codes
1256 //
1257 // Print the bytecodes for this method.
1258 void ciMethod::print_codes_on(outputStream* st) {
1259   check_is_loaded();
1260   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)
1261 }
1262 
1263 
1264 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
1265   check_is_loaded(); \
1266   VM_ENTRY_MARK; \
1267   return get_Method()->flag_accessor(); \
1268 }
1269 
1270 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }
1271 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }
1272 bool ciMethod::is_getter      () const {         FETCH_FLAG_FROM_VM(is_getter); }
1273 bool ciMethod::is_setter      () const {         FETCH_FLAG_FROM_VM(is_setter); }
1274 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }
1275 bool ciMethod::is_object_constructor_or_class_initializer() const { FETCH_FLAG_FROM_VM(is_object_constructor_or_class_initializer); }
1276 bool ciMethod::is_empty       () const {         FETCH_FLAG_FROM_VM(is_empty_method); }
1277 
1278 bool ciMethod::is_boxing_method() const {
1279   if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1280     switch (intrinsic_id()) {
1281       case vmIntrinsics::_Boolean_valueOf:
1282       case vmIntrinsics::_Byte_valueOf:
1283       case vmIntrinsics::_Character_valueOf:
1284       case vmIntrinsics::_Short_valueOf:
1285       case vmIntrinsics::_Integer_valueOf:
1286       case vmIntrinsics::_Long_valueOf:
1287       case vmIntrinsics::_Float_valueOf:
1288       case vmIntrinsics::_Double_valueOf:
1289         return true;
1290       default:
1291         return false;
1292     }
1293   }
1294   return false;
1295 }
1296 
1297 bool ciMethod::is_unboxing_method() const {
1298   if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) {
1299     switch (intrinsic_id()) {
1300       case vmIntrinsics::_booleanValue:
1301       case vmIntrinsics::_byteValue:
1302       case vmIntrinsics::_charValue:
1303       case vmIntrinsics::_shortValue:
1304       case vmIntrinsics::_intValue:
1305       case vmIntrinsics::_longValue:
1306       case vmIntrinsics::_floatValue:
1307       case vmIntrinsics::_doubleValue:
1308         return true;
1309       default:
1310         return false;
1311     }
1312   }
1313   return false;
1314 }
1315 
1316 bool ciMethod::is_vector_method() const {
1317   return (holder() == ciEnv::current()->vector_VectorSupport_klass()) &&
1318          (intrinsic_id() != vmIntrinsics::_none);
1319 }
1320 
1321 BCEscapeAnalyzer  *ciMethod::get_bcea() {
1322 #ifdef COMPILER2
1323   if (_bcea == NULL) {
1324     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
1325   }
1326   return _bcea;
1327 #else // COMPILER2
1328   ShouldNotReachHere();
1329   return NULL;
1330 #endif // COMPILER2
1331 }
1332 
1333 ciMethodBlocks  *ciMethod::get_method_blocks() {
1334   if (_method_blocks == NULL) {
1335     Arena *arena = CURRENT_ENV->arena();
1336     _method_blocks = new (arena) ciMethodBlocks(arena, this);
1337   }
1338   return _method_blocks;
1339 }
1340 
1341 #undef FETCH_FLAG_FROM_VM
1342 
1343 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) {
1344   st->print("%s %s %s",
1345             CURRENT_ENV->replay_name(method->method_holder()),
1346             method->name()->as_quoted_ascii(),
1347             method->signature()->as_quoted_ascii());
1348 }
1349 
1350 void ciMethod::dump_name_as_ascii(outputStream* st) {
1351   Method* method = get_Method();
1352   dump_name_as_ascii(st, method);
1353 }
1354 
1355 void ciMethod::dump_replay_data(outputStream* st) {
1356   ResourceMark rm;
1357   Method* method = get_Method();
1358   if (MethodHandles::is_signature_polymorphic_method(method)) {
1359     // ignore for now
1360     return;
1361   }
1362   MethodCounters* mcs = method->method_counters();
1363   st->print("ciMethod ");
1364   dump_name_as_ascii(st);
1365   st->print_cr(" %d %d %d %d %d",
1366                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),
1367                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),
1368                interpreter_invocation_count(),
1369                interpreter_throwout_count(),
1370                _instructions_size);
1371 }
1372 
1373 // ------------------------------------------------------------------
1374 // ciMethod::print_codes
1375 //
1376 // Print a range of the bytecodes for this method.
1377 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
1378   check_is_loaded();
1379   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)
1380 }
1381 
1382 // ------------------------------------------------------------------
1383 // ciMethod::print_name
1384 //
1385 // Print the name of this method, including signature and some flags.
1386 void ciMethod::print_name(outputStream* st) {
1387   check_is_loaded();
1388   GUARDED_VM_ENTRY(get_Method()->print_name(st);)
1389 }
1390 
1391 // ------------------------------------------------------------------
1392 // ciMethod::print_short_name
1393 //
1394 // Print the name of this method, without signature.
1395 void ciMethod::print_short_name(outputStream* st) {
1396   if (is_loaded()) {
1397     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););
1398   } else {
1399     // Fall back if method is not loaded.
1400     holder()->print_name_on(st);
1401     st->print("::");
1402     name()->print_symbol_on(st);
1403     if (WizardMode)
1404       signature()->as_symbol()->print_symbol_on(st);
1405   }
1406 }
1407 
1408 // ------------------------------------------------------------------
1409 // ciMethod::print_impl
1410 //
1411 // Implementation of the print method.
1412 void ciMethod::print_impl(outputStream* st) {
1413   ciMetadata::print_impl(st);
1414   st->print(" name=");
1415   name()->print_symbol_on(st);
1416   st->print(" holder=");
1417   holder()->print_name_on(st);
1418   st->print(" signature=");
1419   signature()->as_symbol()->print_symbol_on(st);
1420   if (is_loaded()) {
1421     st->print(" loaded=true");
1422     st->print(" arg_size=%d", arg_size());
1423     st->print(" flags=");
1424     flags().print_member_flags(st);
1425   } else {
1426     st->print(" loaded=false");
1427   }
1428 }
1429 
1430 // ------------------------------------------------------------------
1431 
1432 static BasicType erase_to_word_type(BasicType bt) {
1433   if (is_subword_type(bt))   return T_INT;
1434   if (is_reference_type(bt)) return T_OBJECT;
1435   if (bt == T_PRIMITIVE_OBJECT)   return T_OBJECT;
1436   return bt;
1437 }
1438 
1439 static bool basic_types_match(ciType* t1, ciType* t2) {
1440   if (t1 == t2)  return true;
1441   return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type());
1442 }
1443 
1444 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) {
1445   bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() &&
1446                                   !resolved_method->is_method_handle_intrinsic();
1447 
1448   if (!invoke_through_mh_intrinsic) {
1449     // Method name & descriptor should stay the same.
1450     // Signatures may reference unloaded types and thus they may be not strictly equal.
1451     ciSymbol* declared_signature = declared_method->signature()->as_symbol();
1452     ciSymbol* resolved_signature = resolved_method->signature()->as_symbol();
1453 
1454     return (declared_method->name()->equals(resolved_method->name())) &&
1455            (declared_signature->equals(resolved_signature));
1456   }
1457 
1458   ciMethod* linker = declared_method;
1459   ciMethod* target = resolved_method;
1460   // Linkers have appendix argument which is not passed to callee.
1461   int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0;
1462   if (linker->arg_size() != (target->arg_size() + has_appendix)) {
1463     return false; // argument slot count mismatch
1464   }
1465 
1466   ciSignature* linker_sig = linker->signature();
1467   ciSignature* target_sig = target->signature();
1468 
1469   if (linker_sig->count() + (linker->is_static() ? 0 : 1) !=
1470       target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) {
1471     return false; // argument count mismatch
1472   }
1473 
1474   int sbase = 0, rbase = 0;
1475   switch (linker->intrinsic_id()) {
1476     case vmIntrinsics::_linkToVirtual:
1477     case vmIntrinsics::_linkToInterface:
1478     case vmIntrinsics::_linkToSpecial: {
1479       if (target->is_static()) {
1480         return false;
1481       }
1482       if (linker_sig->type_at(0)->is_primitive_type()) {
1483         return false;  // receiver should be an oop
1484       }
1485       sbase = 1; // skip receiver
1486       break;
1487     }
1488     case vmIntrinsics::_linkToStatic: {
1489       if (!target->is_static()) {
1490         return false;
1491       }
1492       break;
1493     }
1494     case vmIntrinsics::_invokeBasic: {
1495       if (target->is_static()) {
1496         if (target_sig->type_at(0)->is_primitive_type()) {
1497           return false; // receiver should be an oop
1498         }
1499         rbase = 1; // skip receiver
1500       }
1501       break;
1502     }
1503     default:
1504       break;
1505   }
1506   assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch");
1507   int arg_count = target_sig->count() - rbase;
1508   for (int i = 0; i < arg_count; i++) {
1509     if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) {
1510       return false;
1511     }
1512   }
1513   // Only check the return type if the symbolic info has non-void return type.
1514   // I.e. the return value of the resolved method can be dropped.
1515   if (!linker->return_type()->is_void() &&
1516       !basic_types_match(linker->return_type(), target->return_type())) {
1517     return false;
1518   }
1519   return true; // no mismatch found
1520 }
1521 
1522 // ------------------------------------------------------------------
1523 
1524 bool ciMethod::is_scalarized_arg(int idx) const {
1525   VM_ENTRY_MARK;
1526   return get_Method()->is_scalarized_arg(idx);
1527 }
1528 
1529 bool ciMethod::has_scalarized_args() const {
1530   VM_ENTRY_MARK;
1531   return get_Method()->has_scalarized_args();
1532 }
1533 
1534 const GrowableArray<SigEntry>* ciMethod::get_sig_cc() const {
1535   VM_ENTRY_MARK;
1536   if (get_Method()->adapter() == NULL) {
1537     return NULL;
1538   }
1539   return get_Method()->adapter()->get_sig_cc();
1540 }