jdk8-mips64-public/hotspot: src/share/vm/ci/ciMethod.cpp@04ff2f6cd0eb

     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  */

    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

    61 // ciMethod

    62 //

    63 // This class represents a Method* in the HotSpot virtual

    64 // machine.

    67 // ------------------------------------------------------------------

    68 // ciMethod::ciMethod

    69 //

    70 // Loaded method.

    71 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) :

    72   ciMetadata(h_m()),

    73   _holder(holder)

    74 {

    75   assert(h_m() != NULL, "no null method");

    77   // These fields are always filled in in loaded methods.

    78   _flags = ciFlags(h_m()->access_flags());

    80   // Easy to compute, so fill them in now.

    81   _max_stack          = h_m()->max_stack();

    82   _max_locals         = h_m()->max_locals();

    83   _code_size          = h_m()->code_size();

    84   _intrinsic_id       = h_m()->intrinsic_id();

    85   _handler_count      = h_m()->exception_table_length();

    86   _size_of_parameters = h_m()->size_of_parameters();

    87   _uses_monitors      = h_m()->access_flags().has_monitor_bytecodes();

    88   _balanced_monitors  = !_uses_monitors || h_m()->access_flags().is_monitor_matching();

    89   _is_c1_compilable   = !h_m()->is_not_c1_compilable();

    90   _is_c2_compilable   = !h_m()->is_not_c2_compilable();

    91   // Lazy fields, filled in on demand.  Require allocation.

    92   _code               = NULL;

    93   _exception_handlers = NULL;

    94   _liveness           = NULL;

    95   _method_blocks = NULL;

    96 #if defined(COMPILER2) || defined(SHARK)

    97   _flow               = NULL;

    98   _bcea               = NULL;

    99 #endif // COMPILER2 || SHARK

   101   ciEnv *env = CURRENT_ENV;

   102   if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) {

   103     // 6328518 check hotswap conditions under the right lock.

   104     MutexLocker locker(Compile_lock);

   105     if (Dependencies::check_evol_method(h_m()) != NULL) {

   106       _is_c1_compilable = false;

   107       _is_c2_compilable = false;

   108     }

   109   } else {

   110     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());

   111   }

   113   if (h_m()->method_holder()->is_linked()) {

   114     _can_be_statically_bound = h_m()->can_be_statically_bound();

   115   } else {

   116     // Have to use a conservative value in this case.

   117     _can_be_statically_bound = false;

   118   }

   120   // Adjust the definition of this condition to be more useful:

   121   // %%% take these conditions into account in vtable generation

   122   if (!_can_be_statically_bound && h_m()->is_private())

   123     _can_be_statically_bound = true;

   124   if (_can_be_statically_bound && h_m()->is_abstract())

   125     _can_be_statically_bound = false;

   127   // generating _signature may allow GC and therefore move m.

   128   // These fields are always filled in.

   129   _name = env->get_symbol(h_m()->name());

   130   ciSymbol* sig_symbol = env->get_symbol(h_m()->signature());

   131   constantPoolHandle cpool = h_m()->constants();

   132   _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol);

   133   _method_data = NULL;

   134   // Take a snapshot of these values, so they will be commensurate with the MDO.

   135   if (ProfileInterpreter || TieredCompilation) {

   136     int invcnt = h_m()->interpreter_invocation_count();

   137     // if the value overflowed report it as max int

   138     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;

   139     _interpreter_throwout_count   = h_m()->interpreter_throwout_count();

   140   } else {

   141     _interpreter_invocation_count = 0;

   142     _interpreter_throwout_count = 0;

   143   }

   144   if (_interpreter_invocation_count == 0)

   145     _interpreter_invocation_count = 1;

   146   _instructions_size = -1;

   147 #ifdef ASSERT

   148   if (ReplayCompiles) {

   149     ciReplay::initialize(this);

   150   }

   151 #endif

   152 }

   155 // ------------------------------------------------------------------

   156 // ciMethod::ciMethod

   157 //

   158 // Unloaded method.

   159 ciMethod::ciMethod(ciInstanceKlass* holder,

   160                    ciSymbol*        name,

   161                    ciSymbol*        signature,

   162                    ciInstanceKlass* accessor) :

   163   ciMetadata((Metadata*)NULL),

   164   _name(                   name),

   165   _holder(                 holder),

   166   _intrinsic_id(           vmIntrinsics::_none),

   167   _liveness(               NULL),

   168   _can_be_statically_bound(false),

   169   _method_blocks(          NULL),

   170   _method_data(            NULL)

   171 #if defined(COMPILER2) || defined(SHARK)

   172   ,

   173   _flow(                   NULL),

   174   _bcea(                   NULL),

   175   _instructions_size(-1)

   176 #endif // COMPILER2 || SHARK

   177 {

   178   // Usually holder and accessor are the same type but in some cases

   179   // the holder has the wrong class loader (e.g. invokedynamic call

   180   // sites) so we pass the accessor.

   181   _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature);

   182 }

   185 // ------------------------------------------------------------------

   186 // ciMethod::load_code

   187 //

   188 // Load the bytecodes and exception handler table for this method.

   189 void ciMethod::load_code() {

   190   VM_ENTRY_MARK;

   191   assert(is_loaded(), "only loaded methods have code");

   193   Method* me = get_Method();

   194   Arena* arena = CURRENT_THREAD_ENV->arena();

   196   // Load the bytecodes.

   197   _code = (address)arena->Amalloc(code_size());

   198   memcpy(_code, me->code_base(), code_size());

   200   // Revert any breakpoint bytecodes in ci's copy

   201   if (me->number_of_breakpoints() > 0) {

   202     BreakpointInfo* bp = me->method_holder()->breakpoints();

   203     for (; bp != NULL; bp = bp->next()) {

   204       if (bp->match(me)) {

   205         code_at_put(bp->bci(), bp->orig_bytecode());

   206       }

   207     }

   208   }

   210   // And load the exception table.

   211   ExceptionTable exc_table(me);

   213   // Allocate one extra spot in our list of exceptions.  This

   214   // last entry will be used to represent the possibility that

   215   // an exception escapes the method.  See ciExceptionHandlerStream

   216   // for details.

   217   _exception_handlers =

   218     (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)

   219                                          * (_handler_count + 1));

   220   if (_handler_count > 0) {

   221     for (int i=0; i<_handler_count; i++) {

   222       _exception_handlers[i] = new (arena) ciExceptionHandler(

   223                                 holder(),

   224             /* start    */      exc_table.start_pc(i),

   225             /* limit    */      exc_table.end_pc(i),

   226             /* goto pc  */      exc_table.handler_pc(i),

   227             /* cp index */      exc_table.catch_type_index(i));

   228     }

   229   }

   231   // Put an entry at the end of our list to represent the possibility

   232   // of exceptional exit.

   233   _exception_handlers[_handler_count] =

   234     new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);

   236   if (CIPrintMethodCodes) {

   237     print_codes();

   238   }

   239 }

   242 // ------------------------------------------------------------------

   243 // ciMethod::has_linenumber_table

   244 //

   245 // length unknown until decompression

   246 bool    ciMethod::has_linenumber_table() const {

   247   check_is_loaded();

   248   VM_ENTRY_MARK;

   249   return get_Method()->has_linenumber_table();

   250 }

   253 // ------------------------------------------------------------------

   254 // ciMethod::compressed_linenumber_table

   255 u_char* ciMethod::compressed_linenumber_table() const {

   256   check_is_loaded();

   257   VM_ENTRY_MARK;

   258   return get_Method()->compressed_linenumber_table();

   259 }

   262 // ------------------------------------------------------------------

   263 // ciMethod::line_number_from_bci

   264 int ciMethod::line_number_from_bci(int bci) const {

   265   check_is_loaded();

   266   VM_ENTRY_MARK;

   267   return get_Method()->line_number_from_bci(bci);

   268 }

   271 // ------------------------------------------------------------------

   272 // ciMethod::vtable_index

   273 //

   274 // Get the position of this method's entry in the vtable, if any.

   275 int ciMethod::vtable_index() {

   276   check_is_loaded();

   277   assert(holder()->is_linked(), "must be linked");

   278   VM_ENTRY_MARK;

   279   return get_Method()->vtable_index();

   280 }

   283 #ifdef SHARK

   284 // ------------------------------------------------------------------

   285 // ciMethod::itable_index

   286 //

   287 // Get the position of this method's entry in the itable, if any.

   288 int ciMethod::itable_index() {

   289   check_is_loaded();

   290   assert(holder()->is_linked(), "must be linked");

   291   VM_ENTRY_MARK;

   292   Method* m = get_Method();

   293   if (!m->has_itable_index())

   294     return Method::nonvirtual_vtable_index;

   295   return m->itable_index();

   296 }

   297 #endif // SHARK

   300 // ------------------------------------------------------------------

   301 // ciMethod::native_entry

   302 //

   303 // Get the address of this method's native code, if any.

   304 address ciMethod::native_entry() {

   305   check_is_loaded();

   306   assert(flags().is_native(), "must be native method");

   307   VM_ENTRY_MARK;

   308   Method* method = get_Method();

   309   address entry = method->native_function();

   310   assert(entry != NULL, "must be valid entry point");

   311   return entry;

   312 }

   315 // ------------------------------------------------------------------

   316 // ciMethod::interpreter_entry

   317 //

   318 // Get the entry point for running this method in the interpreter.

   319 address ciMethod::interpreter_entry() {

   320   check_is_loaded();

   321   VM_ENTRY_MARK;

   322   methodHandle mh(THREAD, get_Method());

   323   return Interpreter::entry_for_method(mh);

   324 }

   327 // ------------------------------------------------------------------

   328 // ciMethod::uses_balanced_monitors

   329 //

   330 // Does this method use monitors in a strict stack-disciplined manner?

   331 bool ciMethod::has_balanced_monitors() {

   332   check_is_loaded();

   333   if (_balanced_monitors) return true;

   335   // Analyze the method to see if monitors are used properly.

   336   VM_ENTRY_MARK;

   337   methodHandle method(THREAD, get_Method());

   338   assert(method->has_monitor_bytecodes(), "should have checked this");

   340   // Check to see if a previous compilation computed the

   341   // monitor-matching analysis.

   342   if (method->guaranteed_monitor_matching()) {

   343     _balanced_monitors = true;

   344     return true;

   345   }

   347   {

   348     EXCEPTION_MARK;

   349     ResourceMark rm(THREAD);

   350     GeneratePairingInfo gpi(method);

   351     gpi.compute_map(CATCH);

   352     if (!gpi.monitor_safe()) {

   353       return false;

   354     }

   355     method->set_guaranteed_monitor_matching();

   356     _balanced_monitors = true;

   357   }

   358   return true;

   359 }

   362 // ------------------------------------------------------------------

   363 // ciMethod::get_flow_analysis

   364 ciTypeFlow* ciMethod::get_flow_analysis() {

   365 #if defined(COMPILER2) || defined(SHARK)

   366   if (_flow == NULL) {

   367     ciEnv* env = CURRENT_ENV;

   368     _flow = new (env->arena()) ciTypeFlow(env, this);

   369     _flow->do_flow();

   370   }

   371   return _flow;

   372 #else // COMPILER2 || SHARK

   373   ShouldNotReachHere();

   374   return NULL;

   375 #endif // COMPILER2 || SHARK

   376 }

   379 // ------------------------------------------------------------------

   380 // ciMethod::get_osr_flow_analysis

   381 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {

   382 #if defined(COMPILER2) || defined(SHARK)

   383   // OSR entry points are always place after a call bytecode of some sort

   384   assert(osr_bci >= 0, "must supply valid OSR entry point");

   385   ciEnv* env = CURRENT_ENV;

   386   ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);

   387   flow->do_flow();

   388   return flow;

   389 #else // COMPILER2 || SHARK

   390   ShouldNotReachHere();

   391   return NULL;

   392 #endif // COMPILER2 || SHARK

   393 }

   395 // ------------------------------------------------------------------

   396 // ciMethod::raw_liveness_at_bci

   397 //

   398 // Which local variables are live at a specific bci?

   399 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {

   400   check_is_loaded();

   401   if (_liveness == NULL) {

   402     // Create the liveness analyzer.

   403     Arena* arena = CURRENT_ENV->arena();

   404     _liveness = new (arena) MethodLiveness(arena, this);

   405     _liveness->compute_liveness();

   406   }

   407   return _liveness->get_liveness_at(bci);

   408 }

   410 // ------------------------------------------------------------------

   411 // ciMethod::liveness_at_bci

   412 //

   413 // Which local variables are live at a specific bci?  When debugging

   414 // will return true for all locals in some cases to improve debug

   415 // information.

   416 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {

   417   MethodLivenessResult result = raw_liveness_at_bci(bci);

   418   if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {

   419     // Keep all locals live for the user's edification and amusement.

   420     result.at_put_range(0, result.size(), true);

   421   }

   422   return result;

   423 }

   425 // ciMethod::live_local_oops_at_bci

   426 //

   427 // find all the live oops in the locals array for a particular bci

   428 // Compute what the interpreter believes by using the interpreter

   429 // oopmap generator. This is used as a double check during osr to

   430 // guard against conservative result from MethodLiveness making us

   431 // think a dead oop is live.  MethodLiveness is conservative in the

   432 // sense that it may consider locals to be live which cannot be live,

   433 // like in the case where a local could contain an oop or  a primitive

   434 // along different paths.  In that case the local must be dead when

   435 // those paths merge. Since the interpreter's viewpoint is used when

   436 // gc'ing an interpreter frame we need to use its viewpoint  during

   437 // OSR when loading the locals.

   439 BitMap ciMethod::live_local_oops_at_bci(int bci) {

   440   VM_ENTRY_MARK;

   441   InterpreterOopMap mask;

   442   OopMapCache::compute_one_oop_map(get_Method(), bci, &mask);

   443   int mask_size = max_locals();

   444   BitMap result(mask_size);

   445   result.clear();

   446   int i;

   447   for (i = 0; i < mask_size ; i++ ) {

   448     if (mask.is_oop(i)) result.set_bit(i);

   449   }

   450   return result;

   451 }

   454 #ifdef COMPILER1

   455 // ------------------------------------------------------------------

   456 // ciMethod::bci_block_start

   457 //

   458 // Marks all bcis where a new basic block starts

   459 const BitMap ciMethod::bci_block_start() {

   460   check_is_loaded();

   461   if (_liveness == NULL) {

   462     // Create the liveness analyzer.

   463     Arena* arena = CURRENT_ENV->arena();

   464     _liveness = new (arena) MethodLiveness(arena, this);

   465     _liveness->compute_liveness();

   466   }

   468   return _liveness->get_bci_block_start();

   469 }

   470 #endif // COMPILER1

   473 // ------------------------------------------------------------------

   474 // ciMethod::call_profile_at_bci

   475 //

   476 // Get the ciCallProfile for the invocation of this method.

   477 // Also reports receiver types for non-call type checks (if TypeProfileCasts).

   478 ciCallProfile ciMethod::call_profile_at_bci(int bci) {

   479   ResourceMark rm;

   480   ciCallProfile result;

   481   if (method_data() != NULL && method_data()->is_mature()) {

   482     ciProfileData* data = method_data()->bci_to_data(bci);

   483     if (data != NULL && data->is_CounterData()) {

   484       // Every profiled call site has a counter.

   485       int count = data->as_CounterData()->count();

   487       if (!data->is_ReceiverTypeData()) {

   488         result._receiver_count[0] = 0;  // that's a definite zero

   489       } else { // ReceiverTypeData is a subclass of CounterData

   490         ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();

   491         // In addition, virtual call sites have receiver type information

   492         int receivers_count_total = 0;

   493         int morphism = 0;

   494         // Precompute morphism for the possible fixup

   495         for (uint i = 0; i < call->row_limit(); i++) {

   496           ciKlass* receiver = call->receiver(i);

   497           if (receiver == NULL)  continue;

   498           morphism++;

   499         }

   500         int epsilon = 0;

   501         if (TieredCompilation && ProfileInterpreter) {

   502           // Interpreter and C1 treat final and special invokes differently.

   503           // C1 will record a type, whereas the interpreter will just

   504           // increment the count. Detect this case.

   505           if (morphism == 1 && count > 0) {

   506             epsilon = count;

   507             count = 0;

   508           }

   509         }

   510         for (uint i = 0; i < call->row_limit(); i++) {

   511           ciKlass* receiver = call->receiver(i);

   512           if (receiver == NULL)  continue;

   513           int rcount = call->receiver_count(i) + epsilon;

   514           if (rcount == 0) rcount = 1; // Should be valid value

   515           receivers_count_total += rcount;

   516           // Add the receiver to result data.

   517           result.add_receiver(receiver, rcount);

   518           // If we extend profiling to record methods,

   519           // we will set result._method also.

   520         }

   521         // Determine call site's morphism.

   522         // The call site count is 0 with known morphism (onlt 1 or 2 receivers)

   523         // or < 0 in the case of a type check failured for checkcast, aastore, instanceof.

   524         // The call site count is > 0 in the case of a polymorphic virtual call.

   525         if (morphism > 0 && morphism == result._limit) {

   526            // The morphism <= MorphismLimit.

   527            if ((morphism <  ciCallProfile::MorphismLimit) ||

   528                (morphism == ciCallProfile::MorphismLimit && count == 0)) {

   529 #ifdef ASSERT

   530              if (count > 0) {

   531                this->print_short_name(tty);

   532                tty->print_cr(" @ bci:%d", bci);

   533                this->print_codes();

   534                assert(false, "this call site should not be polymorphic");

   535              }

   536 #endif

   537              result._morphism = morphism;

   538            }

   539         }

   540         // Make the count consistent if this is a call profile. If count is

   541         // zero or less, presume that this is a typecheck profile and

   542         // do nothing.  Otherwise, increase count to be the sum of all

   543         // receiver's counts.

   544         if (count >= 0) {

   545           count += receivers_count_total;

   546         }

   547       }

   548       result._count = count;

   549     }

   550   }

   551   return result;

   552 }

   554 // ------------------------------------------------------------------

   555 // Add new receiver and sort data by receiver's profile count.

   556 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {

   557   // Add new receiver and sort data by receiver's counts when we have space

   558   // for it otherwise replace the less called receiver (less called receiver

   559   // is placed to the last array element which is not used).

   560   // First array's element contains most called receiver.

   561   int i = _limit;

   562   for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {

   563     _receiver[i] = _receiver[i-1];

   564     _receiver_count[i] = _receiver_count[i-1];

   565   }

   566   _receiver[i] = receiver;

   567   _receiver_count[i] = receiver_count;

   568   if (_limit < MorphismLimit) _limit++;

   569 }

   572 void ciMethod::assert_virtual_call_type_ok(int bci) {

   573   assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual ||

   574          java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));

   575 }

   577 void ciMethod::assert_call_type_ok(int bci) {

   578   assert(java_code_at_bci(bci) == Bytecodes::_invokestatic ||

   579          java_code_at_bci(bci) == Bytecodes::_invokespecial ||

   580          java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))));

   581 }

   583 /**

   584  * Check whether profiling provides a type for the argument i to the

   585  * call at bci bci

   586  *

   587  * @param bci  bci of the call

   588  * @param i    argument number

   589  * @return     profiled type

   590  *

   591  * If the profile reports that the argument may be null, return false

   592  * at least for now.

   593  */

   594 ciKlass* ciMethod::argument_profiled_type(int bci, int i) {

   595   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {

   596     ciProfileData* data = method_data()->bci_to_data(bci);

   597     if (data != NULL) {

   598       if (data->is_VirtualCallTypeData()) {

   599         assert_virtual_call_type_ok(bci);

   600         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();

   601         if (i >= call->number_of_arguments()) {

   602           return NULL;

   603         }

   604         ciKlass* type = call->valid_argument_type(i);

   605         if (type != NULL && !call->argument_maybe_null(i)) {

   606           return type;

   607         }

   608       } else if (data->is_CallTypeData()) {

   609         assert_call_type_ok(bci);

   610         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();

   611         if (i >= call->number_of_arguments()) {

   612           return NULL;

   613         }

   614         ciKlass* type = call->valid_argument_type(i);

   615         if (type != NULL && !call->argument_maybe_null(i)) {

   616           return type;

   617         }

   618       }

   619     }

   620   }

   621   return NULL;

   622 }

   624 /**

   625  * Check whether profiling provides a type for the return value from

   626  * the call at bci bci

   627  *

   628  * @param bci  bci of the call

   629  * @return     profiled type

   630  *

   631  * If the profile reports that the argument may be null, return false

   632  * at least for now.

   633  */

   634 ciKlass* ciMethod::return_profiled_type(int bci) {

   635   if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) {

   636     ciProfileData* data = method_data()->bci_to_data(bci);

   637     if (data != NULL) {

   638       if (data->is_VirtualCallTypeData()) {

   639         assert_virtual_call_type_ok(bci);

   640         ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData();

   641         ciKlass* type = call->valid_return_type();

   642         if (type != NULL && !call->return_maybe_null()) {

   643           return type;

   644         }

   645       } else if (data->is_CallTypeData()) {

   646         assert_call_type_ok(bci);

   647         ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData();

   648         ciKlass* type = call->valid_return_type();

   649         if (type != NULL && !call->return_maybe_null()) {

   650           return type;

   651         }

   652       }

   653     }

   654   }

   655   return NULL;

   656 }

   658 /**

   659  * Check whether profiling provides a type for the parameter i

   660  *

   661  * @param i    parameter number

   662  * @return     profiled type

   663  *

   664  * If the profile reports that the argument may be null, return false

   665  * at least for now.

   666  */

   667 ciKlass* ciMethod::parameter_profiled_type(int i) {

   668   if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) {

   669     ciParametersTypeData* parameters = method_data()->parameters_type_data();

   670     if (parameters != NULL && i < parameters->number_of_parameters()) {

   671       ciKlass* type = parameters->valid_parameter_type(i);

   672       if (type != NULL && !parameters->parameter_maybe_null(i)) {

   673         return type;

   674       }

   675     }

   676   }

   677   return NULL;

   678 }

   681 // ------------------------------------------------------------------

   682 // ciMethod::find_monomorphic_target

   683 //

   684 // Given a certain calling environment, find the monomorphic target

   685 // for the call.  Return NULL if the call is not monomorphic in

   686 // its calling environment, or if there are only abstract methods.

   687 // The returned method is never abstract.

   688 // Note: If caller uses a non-null result, it must inform dependencies

   689 // via assert_unique_concrete_method or assert_leaf_type.

   690 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,

   691                                             ciInstanceKlass* callee_holder,

   692                                             ciInstanceKlass* actual_recv,

   693                                             bool check_access) {

   694   check_is_loaded();

   696   if (actual_recv->is_interface()) {

   697     // %%% We cannot trust interface types, yet.  See bug 6312651.

   698     return NULL;

   699   }

   701   ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access);

   702   if (root_m == NULL) {

   703     // Something went wrong looking up the actual receiver method.

   704     return NULL;

   705   }

   706   assert(!root_m->is_abstract(), "resolve_invoke promise");

   708   // Make certain quick checks even if UseCHA is false.

   710   // Is it private or final?

   711   if (root_m->can_be_statically_bound()) {

   712     return root_m;

   713   }

   715   if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {

   716     // Easy case.  There is no other place to put a method, so don't bother

   717     // to go through the VM_ENTRY_MARK and all the rest.

   718     return root_m;

   719   }

   721   // Array methods (clone, hashCode, etc.) are always statically bound.

   722   // If we were to see an array type here, we'd return root_m.

   723   // However, this method processes only ciInstanceKlasses.  (See 4962591.)

   724   // The inline_native_clone intrinsic narrows Object to T[] properly,

   725   // so there is no need to do the same job here.

   727   if (!UseCHA)  return NULL;

   729   VM_ENTRY_MARK;

   731   // Disable CHA for default methods for now

   732   if (root_m->get_Method()->is_default_method()) {

   733     return NULL;

   734   }

   736   methodHandle target;

   737   {

   738     MutexLocker locker(Compile_lock);

   739     Klass* context = actual_recv->get_Klass();

   740     target = Dependencies::find_unique_concrete_method(context,

   741                                                        root_m->get_Method());

   742     // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.

   743   }

   745 #ifndef PRODUCT

   746   if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) {

   747     tty->print("found a non-root unique target method");

   748     tty->print_cr("  context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name());

   749     tty->print("  method  = ");

   750     target->print_short_name(tty);

   751     tty->cr();

   752   }

   753 #endif //PRODUCT

   755   if (target() == NULL) {

   756     return NULL;

   757   }

   758   if (target() == root_m->get_Method()) {

   759     return root_m;

   760   }

   761   if (!root_m->is_public() &&

   762       !root_m->is_protected()) {

   763     // If we are going to reason about inheritance, it's easiest

   764     // if the method in question is public, protected, or private.

   765     // If the answer is not root_m, it is conservatively correct

   766     // to return NULL, even if the CHA encountered irrelevant

   767     // methods in other packages.

   768     // %%% TO DO: Work out logic for package-private methods

   769     // with the same name but different vtable indexes.

   770     return NULL;

   771   }

   772   return CURRENT_THREAD_ENV->get_method(target());

   773 }

   775 // ------------------------------------------------------------------

   776 // ciMethod::resolve_invoke

   777 //

   778 // Given a known receiver klass, find the target for the call.

   779 // Return NULL if the call has no target or the target is abstract.

   780 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) {

   781    check_is_loaded();

   782    VM_ENTRY_MARK;

   784    KlassHandle caller_klass (THREAD, caller->get_Klass());

   785    KlassHandle h_recv       (THREAD, exact_receiver->get_Klass());

   786    KlassHandle h_resolved   (THREAD, holder()->get_Klass());

   787    Symbol* h_name      = name()->get_symbol();

   788    Symbol* h_signature = signature()->get_symbol();

   790    methodHandle m;

   791    // Only do exact lookup if receiver klass has been linked.  Otherwise,

   792    // the vtable has not been setup, and the LinkResolver will fail.

   793    if (h_recv->oop_is_array()

   794         ||

   795        InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {

   796      if (holder()->is_interface()) {

   797        m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access);

   798      } else {

   799        m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access);

   800      }

   801    }

   803    if (m.is_null()) {

   804      // Return NULL only if there was a problem with lookup (uninitialized class, etc.)

   805      return NULL;

   806    }

   808    ciMethod* result = this;

   809    if (m() != get_Method()) {

   810      result = CURRENT_THREAD_ENV->get_method(m());

   811    }

   813    // Don't return abstract methods because they aren't

   814    // optimizable or interesting.

   815    if (result->is_abstract()) {

   816      return NULL;

   817    } else {

   818      return result;

   819    }

   820 }

   822 // ------------------------------------------------------------------

   823 // ciMethod::resolve_vtable_index

   824 //

   825 // Given a known receiver klass, find the vtable index for the call.

   826 // Return Method::invalid_vtable_index if the vtable_index is unknown.

   827 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {

   828    check_is_loaded();

   830    int vtable_index = Method::invalid_vtable_index;

   831    // Only do lookup if receiver klass has been linked.  Otherwise,

   832    // the vtable has not been setup, and the LinkResolver will fail.

   833    if (!receiver->is_interface()

   834        && (!receiver->is_instance_klass() ||

   835            receiver->as_instance_klass()->is_linked())) {

   836      VM_ENTRY_MARK;

   838      KlassHandle caller_klass (THREAD, caller->get_Klass());

   839      KlassHandle h_recv       (THREAD, receiver->get_Klass());

   840      Symbol* h_name = name()->get_symbol();

   841      Symbol* h_signature = signature()->get_symbol();

   843      vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);

   844      if (vtable_index == Method::nonvirtual_vtable_index) {

   845        // A statically bound method.  Return "no such index".

   846        vtable_index = Method::invalid_vtable_index;

   847      }

   848    }

   850    return vtable_index;

   851 }

   853 // ------------------------------------------------------------------

   854 // ciMethod::interpreter_call_site_count

   855 int ciMethod::interpreter_call_site_count(int bci) {

   856   if (method_data() != NULL) {

   857     ResourceMark rm;

   858     ciProfileData* data = method_data()->bci_to_data(bci);

   859     if (data != NULL && data->is_CounterData()) {

   860       return scale_count(data->as_CounterData()->count());

   861     }

   862   }

   863   return -1;  // unknown

   864 }

   866 // ------------------------------------------------------------------

   867 // ciMethod::get_field_at_bci

   868 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) {

   869   ciBytecodeStream iter(this);

   870   iter.reset_to_bci(bci);

   871   iter.next();

   872   return iter.get_field(will_link);

   873 }

   875 // ------------------------------------------------------------------

   876 // ciMethod::get_method_at_bci

   877 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) {

   878   ciBytecodeStream iter(this);

   879   iter.reset_to_bci(bci);

   880   iter.next();

   881   return iter.get_method(will_link, declared_signature);

   882 }

   884 // ------------------------------------------------------------------

   885 // Adjust a CounterData count to be commensurate with

   886 // interpreter_invocation_count.  If the MDO exists for

   887 // only 25% of the time the method exists, then the

   888 // counts in the MDO should be scaled by 4X, so that

   889 // they can be usefully and stably compared against the

   890 // invocation counts in methods.

   891 int ciMethod::scale_count(int count, float prof_factor) {

   892   if (count > 0 && method_data() != NULL) {

   893     int counter_life;

   894     int method_life = interpreter_invocation_count();

   895     if (TieredCompilation) {

   896       // In tiered the MDO's life is measured directly, so just use the snapshotted counters

   897       counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count());

   898     } else {

   899       int current_mileage = method_data()->current_mileage();

   900       int creation_mileage = method_data()->creation_mileage();

   901       counter_life = current_mileage - creation_mileage;

   902     }

   904     // counter_life due to backedge_counter could be > method_life

   905     if (counter_life > method_life)

   906       counter_life = method_life;

   907     if (0 < counter_life && counter_life <= method_life) {

   908       count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);

   909       count = (count > 0) ? count : 1;

   910     }

   911   }

   912   return count;

   913 }

   916 // ------------------------------------------------------------------

   917 // ciMethod::is_special_get_caller_class_method

   918 //

   919 bool ciMethod::is_ignored_by_security_stack_walk() const {

   920   check_is_loaded();

   921   VM_ENTRY_MARK;

   922   return get_Method()->is_ignored_by_security_stack_walk();

   923 }

   926 // ------------------------------------------------------------------

   927 // invokedynamic support

   929 // ------------------------------------------------------------------

   930 // ciMethod::is_method_handle_intrinsic

   931 //

   932 // Return true if the method is an instance of the JVM-generated

   933 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc.

   934 bool ciMethod::is_method_handle_intrinsic() const {

   935   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded

   936   return (MethodHandles::is_signature_polymorphic(iid) &&

   937           MethodHandles::is_signature_polymorphic_intrinsic(iid));

   938 }

   940 // ------------------------------------------------------------------

   941 // ciMethod::is_compiled_lambda_form

   942 //

   943 // Return true if the method is a generated MethodHandle adapter.

   944 // These are built by Java code.

   945 bool ciMethod::is_compiled_lambda_form() const {

   946   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded

   947   return iid == vmIntrinsics::_compiledLambdaForm;

   948 }

   950 // ------------------------------------------------------------------

   951 // ciMethod::has_member_arg

   952 //

   953 // Return true if the method is a linker intrinsic like _linkToVirtual.

   954 // These are built by the JVM.

   955 bool ciMethod::has_member_arg() const {

   956   vmIntrinsics::ID iid = _intrinsic_id;  // do not check if loaded

   957   return (MethodHandles::is_signature_polymorphic(iid) &&

   958           MethodHandles::has_member_arg(iid));

   959 }

   961 // ------------------------------------------------------------------

   962 // ciMethod::ensure_method_data

   963 //

   964 // Generate new MethodData* objects at compile time.

   965 // Return true if allocation was successful or no MDO is required.

   966 bool ciMethod::ensure_method_data(methodHandle h_m) {

   967   EXCEPTION_CONTEXT;

   968   if (is_native() || is_abstract() || h_m()->is_accessor()) {

   969     return true;

   970   }

   971   if (h_m()->method_data() == NULL) {

   972     Method::build_interpreter_method_data(h_m, THREAD);

   973     if (HAS_PENDING_EXCEPTION) {

   974       CLEAR_PENDING_EXCEPTION;

   975     }

   976   }

   977   if (h_m()->method_data() != NULL) {

   978     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());

   979     _method_data->load_data();

   980     return true;

   981   } else {

   982     _method_data = CURRENT_ENV->get_empty_methodData();

   983     return false;

   984   }

   985 }

   987 // public, retroactive version

   988 bool ciMethod::ensure_method_data() {

   989   bool result = true;

   990   if (_method_data == NULL || _method_data->is_empty()) {

   991     GUARDED_VM_ENTRY({

   992       result = ensure_method_data(get_Method());

   993     });

   994   }

   995   return result;

   996 }

   999 // ------------------------------------------------------------------

  1000 // ciMethod::method_data

  1001 //

  1002 ciMethodData* ciMethod::method_data() {

  1003   if (_method_data != NULL) {

  1004     return _method_data;

  1005   }

  1006   VM_ENTRY_MARK;

  1007   ciEnv* env = CURRENT_ENV;

  1008   Thread* my_thread = JavaThread::current();

  1009   methodHandle h_m(my_thread, get_Method());

  1011   if (h_m()->method_data() != NULL) {

  1012     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());

  1013     _method_data->load_data();

  1014   } else {

  1015     _method_data = CURRENT_ENV->get_empty_methodData();

  1016   }

  1017   return _method_data;

  1019 }

  1021 // ------------------------------------------------------------------

  1022 // ciMethod::method_data_or_null

  1023 // Returns a pointer to ciMethodData if MDO exists on the VM side,

  1024 // NULL otherwise.

  1025 ciMethodData* ciMethod::method_data_or_null() {

  1026   ciMethodData *md = method_data();

  1027   if (md->is_empty()) {

  1028     return NULL;

  1029   }

  1030   return md;

  1031 }

  1033 // ------------------------------------------------------------------

  1034 // ciMethod::ensure_method_counters

  1035 //

  1036 MethodCounters* ciMethod::ensure_method_counters() {

  1037   check_is_loaded();

  1038   VM_ENTRY_MARK;

  1039   methodHandle mh(THREAD, get_Method());

  1040   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);

  1041   return method_counters;

  1042 }

  1044 // ------------------------------------------------------------------

  1045 // ciMethod::should_exclude

  1046 //

  1047 // Should this method be excluded from compilation?

  1048 bool ciMethod::should_exclude() {

  1049   check_is_loaded();

  1050   VM_ENTRY_MARK;

  1051   methodHandle mh(THREAD, get_Method());

  1052   bool ignore;

  1053   return CompilerOracle::should_exclude(mh, ignore);

  1054 }

  1056 // ------------------------------------------------------------------

  1057 // ciMethod::should_inline

  1058 //

  1059 // Should this method be inlined during compilation?

  1060 bool ciMethod::should_inline() {

  1061   check_is_loaded();

  1062   VM_ENTRY_MARK;

  1063   methodHandle mh(THREAD, get_Method());

  1064   return CompilerOracle::should_inline(mh);

  1065 }

  1067 // ------------------------------------------------------------------

  1068 // ciMethod::should_not_inline

  1069 //

  1070 // Should this method be disallowed from inlining during compilation?

  1071 bool ciMethod::should_not_inline() {

  1072   check_is_loaded();

  1073   VM_ENTRY_MARK;

  1074   methodHandle mh(THREAD, get_Method());

  1075   return CompilerOracle::should_not_inline(mh);

  1076 }

  1078 // ------------------------------------------------------------------

  1079 // ciMethod::should_print_assembly

  1080 //

  1081 // Should the compiler print the generated code for this method?

  1082 bool ciMethod::should_print_assembly() {

  1083   check_is_loaded();

  1084   VM_ENTRY_MARK;

  1085   methodHandle mh(THREAD, get_Method());

  1086   return CompilerOracle::should_print(mh);

  1087 }

  1089 // ------------------------------------------------------------------

  1090 // ciMethod::break_at_execute

  1091 //

  1092 // Should the compiler insert a breakpoint into the generated code

  1093 // method?

  1094 bool ciMethod::break_at_execute() {

  1095   check_is_loaded();

  1096   VM_ENTRY_MARK;

  1097   methodHandle mh(THREAD, get_Method());

  1098   return CompilerOracle::should_break_at(mh);

  1099 }

  1101 // ------------------------------------------------------------------

  1102 // ciMethod::has_option

  1103 //

  1104 bool ciMethod::has_option(const char* option) {

  1105   check_is_loaded();

  1106   VM_ENTRY_MARK;

  1107   methodHandle mh(THREAD, get_Method());

  1108   return CompilerOracle::has_option_string(mh, option);

  1109 }

  1111 // ------------------------------------------------------------------

  1112 // ciMethod::has_option_value

  1113 //

  1114 template<typename T>

  1115 bool ciMethod::has_option_value(const char* option, T& 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 // Explicit instantiation for all OptionTypes supported.

  1122 template bool ciMethod::has_option_value<intx>(const char* option, intx& value);

  1123 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value);

  1124 template bool ciMethod::has_option_value<bool>(const char* option, bool& value);

  1125 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value);

  1127 // ------------------------------------------------------------------

  1128 // ciMethod::can_be_compiled

  1129 //

  1130 // Have previous compilations of this method succeeded?

  1131 bool ciMethod::can_be_compiled() {

  1132   check_is_loaded();

  1133   ciEnv* env = CURRENT_ENV;

  1134   if (is_c1_compile(env->comp_level())) {

  1135     return _is_c1_compilable;

  1136   }

  1137   return _is_c2_compilable;

  1138 }

  1140 // ------------------------------------------------------------------

  1141 // ciMethod::set_not_compilable

  1142 //

  1143 // Tell the VM that this method cannot be compiled at all.

  1144 void ciMethod::set_not_compilable(const char* reason) {

  1145   check_is_loaded();

  1146   VM_ENTRY_MARK;

  1147   ciEnv* env = CURRENT_ENV;

  1148   if (is_c1_compile(env->comp_level())) {

  1149     _is_c1_compilable = false;

  1150   } else {

  1151     _is_c2_compilable = false;

  1152   }

  1153   get_Method()->set_not_compilable(env->comp_level(), true, reason);

  1154 }

  1156 // ------------------------------------------------------------------

  1157 // ciMethod::can_be_osr_compiled

  1158 //

  1159 // Have previous compilations of this method succeeded?

  1160 //

  1161 // Implementation note: the VM does not currently keep track

  1162 // of failed OSR compilations per bci.  The entry_bci parameter

  1163 // is currently unused.

  1164 bool ciMethod::can_be_osr_compiled(int entry_bci) {

  1165   check_is_loaded();

  1166   VM_ENTRY_MARK;

  1167   ciEnv* env = CURRENT_ENV;

  1168   return !get_Method()->is_not_osr_compilable(env->comp_level());

  1169 }

  1171 // ------------------------------------------------------------------

  1172 // ciMethod::has_compiled_code

  1173 bool ciMethod::has_compiled_code() {

  1174   return instructions_size() > 0;

  1175 }

  1177 int ciMethod::comp_level() {

  1178   check_is_loaded();

  1179   VM_ENTRY_MARK;

  1180   nmethod* nm = get_Method()->code();

  1181   if (nm != NULL) return nm->comp_level();

  1182   return 0;

  1183 }

  1185 int ciMethod::highest_osr_comp_level() {

  1186   check_is_loaded();

  1187   VM_ENTRY_MARK;

  1188   return get_Method()->highest_osr_comp_level();

  1189 }

  1191 // ------------------------------------------------------------------

  1192 // ciMethod::code_size_for_inlining

  1193 //

  1194 // Code size for inlining decisions.  This method returns a code

  1195 // size of 1 for methods which has the ForceInline annotation.

  1196 int ciMethod::code_size_for_inlining() {

  1197   check_is_loaded();

  1198   if (get_Method()->force_inline()) {

  1199     return 1;

  1200   }

  1201   return code_size();

  1202 }

  1204 // ------------------------------------------------------------------

  1205 // ciMethod::instructions_size

  1206 //

  1207 // This is a rough metric for "fat" methods, compared before inlining

  1208 // with InlineSmallCode.  The CodeBlob::code_size accessor includes

  1209 // junk like exception handler, stubs, and constant table, which are

  1210 // not highly relevant to an inlined method.  So we use the more

  1211 // specific accessor nmethod::insts_size.

  1212 int ciMethod::instructions_size() {

  1213   if (_instructions_size == -1) {

  1214     GUARDED_VM_ENTRY(

  1215                      nmethod* code = get_Method()->code();

  1216                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {

  1217                        _instructions_size = code->insts_end() - code->verified_entry_point();

  1218                      } else {

  1219                        _instructions_size = 0;

  1220                      }

  1221                      );

  1222   }

  1223   return _instructions_size;

  1224 }

  1226 // ------------------------------------------------------------------

  1227 // ciMethod::log_nmethod_identity

  1228 void ciMethod::log_nmethod_identity(xmlStream* log) {

  1229   GUARDED_VM_ENTRY(

  1230     nmethod* code = get_Method()->code();

  1231     if (code != NULL) {

  1232       code->log_identity(log);

  1233     }

  1234   )

  1235 }

  1237 // ------------------------------------------------------------------

  1238 // ciMethod::is_not_reached

  1239 bool ciMethod::is_not_reached(int bci) {

  1240   check_is_loaded();

  1241   VM_ENTRY_MARK;

  1242   return Interpreter::is_not_reached(

  1243                methodHandle(THREAD, get_Method()), bci);

  1244 }

  1246 // ------------------------------------------------------------------

  1247 // ciMethod::was_never_executed

  1248 bool ciMethod::was_executed_more_than(int times) {

  1249   VM_ENTRY_MARK;

  1250   return get_Method()->was_executed_more_than(times);

  1251 }

  1253 // ------------------------------------------------------------------

  1254 // ciMethod::has_unloaded_classes_in_signature

  1255 bool ciMethod::has_unloaded_classes_in_signature() {

  1256   VM_ENTRY_MARK;

  1257   {

  1258     EXCEPTION_MARK;

  1259     methodHandle m(THREAD, get_Method());

  1260     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);

  1261     if( HAS_PENDING_EXCEPTION ) {

  1262       CLEAR_PENDING_EXCEPTION;

  1263       return true;     // Declare that we may have unloaded classes

  1264     }

  1265     return has_unloaded;

  1266   }

  1267 }

  1269 // ------------------------------------------------------------------

  1270 // ciMethod::is_klass_loaded

  1271 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {

  1272   VM_ENTRY_MARK;

  1273   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);

  1274 }

  1276 // ------------------------------------------------------------------

  1277 // ciMethod::check_call

  1278 bool ciMethod::check_call(int refinfo_index, bool is_static) const {

  1279   // This method is used only in C2 from InlineTree::ok_to_inline,

  1280   // and is only used under -Xcomp or -XX:CompileTheWorld.

  1281   // It appears to fail when applied to an invokeinterface call site.

  1282   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.

  1283   VM_ENTRY_MARK;

  1284   {

  1285     EXCEPTION_MARK;

  1286     HandleMark hm(THREAD);

  1287     constantPoolHandle pool (THREAD, get_Method()->constants());

  1288     methodHandle spec_method;

  1289     KlassHandle  spec_klass;

  1290     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);

  1291     LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);

  1292     if (HAS_PENDING_EXCEPTION) {

  1293       CLEAR_PENDING_EXCEPTION;

  1294       return false;

  1295     } else {

  1296       return (spec_method->is_static() == is_static);

  1297     }

  1298   }

  1299   return false;

  1300 }

  1302 // ------------------------------------------------------------------

  1303 // ciMethod::print_codes

  1304 //

  1305 // Print the bytecodes for this method.

  1306 void ciMethod::print_codes_on(outputStream* st) {

  1307   check_is_loaded();

  1308   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)

  1309 }

  1312 #define FETCH_FLAG_FROM_VM(flag_accessor) { \

  1313   check_is_loaded(); \

  1314   VM_ENTRY_MARK; \

  1315   return get_Method()->flag_accessor(); \

  1316 }

  1318 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }

  1319 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }

  1320 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }

  1321 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }

  1322 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }

  1323 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }

  1325 bool ciMethod::is_boxing_method() const {

  1326   if (holder()->is_box_klass()) {

  1327     switch (intrinsic_id()) {

  1328       case vmIntrinsics::_Boolean_valueOf:

  1329       case vmIntrinsics::_Byte_valueOf:

  1330       case vmIntrinsics::_Character_valueOf:

  1331       case vmIntrinsics::_Short_valueOf:

  1332       case vmIntrinsics::_Integer_valueOf:

  1333       case vmIntrinsics::_Long_valueOf:

  1334       case vmIntrinsics::_Float_valueOf:

  1335       case vmIntrinsics::_Double_valueOf:

  1336         return true;

  1337       default:

  1338         return false;

  1339     }

  1340   }

  1341   return false;

  1342 }

  1344 bool ciMethod::is_unboxing_method() const {

  1345   if (holder()->is_box_klass()) {

  1346     switch (intrinsic_id()) {

  1347       case vmIntrinsics::_booleanValue:

  1348       case vmIntrinsics::_byteValue:

  1349       case vmIntrinsics::_charValue:

  1350       case vmIntrinsics::_shortValue:

  1351       case vmIntrinsics::_intValue:

  1352       case vmIntrinsics::_longValue:

  1353       case vmIntrinsics::_floatValue:

  1354       case vmIntrinsics::_doubleValue:

  1355         return true;

  1356       default:

  1357         return false;

  1358     }

  1359   }

  1360   return false;

  1361 }

  1363 BCEscapeAnalyzer  *ciMethod::get_bcea() {

  1364 #ifdef COMPILER2

  1365   if (_bcea == NULL) {

  1366     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);

  1367   }

  1368   return _bcea;

  1369 #else // COMPILER2

  1370   ShouldNotReachHere();

  1371   return NULL;

  1372 #endif // COMPILER2

  1373 }

  1375 ciMethodBlocks  *ciMethod::get_method_blocks() {

  1376   Arena *arena = CURRENT_ENV->arena();

  1377   if (_method_blocks == NULL) {

  1378     _method_blocks = new (arena) ciMethodBlocks(arena, this);

  1379   }

  1380   return _method_blocks;

  1381 }

  1383 #undef FETCH_FLAG_FROM_VM

  1385 void ciMethod::dump_name_as_ascii(outputStream* st) {

  1386   Method* method = get_Method();

  1387   st->print("%s %s %s",

  1388             method->klass_name()->as_quoted_ascii(),

  1389             method->name()->as_quoted_ascii(),

  1390             method->signature()->as_quoted_ascii());

  1391 }

  1393 void ciMethod::dump_replay_data(outputStream* st) {

  1394   ResourceMark rm;

  1395   Method* method = get_Method();

  1396   MethodCounters* mcs = method->method_counters();

  1397   st->print("ciMethod ");

  1398   dump_name_as_ascii(st);

  1399   st->print_cr(" %d %d %d %d %d",

  1400                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),

  1401                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),

  1402                interpreter_invocation_count(),

  1403                interpreter_throwout_count(),

  1404                _instructions_size);

  1405 }

  1407 // ------------------------------------------------------------------

  1408 // ciMethod::print_codes

  1409 //

  1410 // Print a range of the bytecodes for this method.

  1411 void ciMethod::print_codes_on(int from, int to, outputStream* st) {

  1412   check_is_loaded();

  1413   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)

  1414 }

  1416 // ------------------------------------------------------------------

  1417 // ciMethod::print_name

  1418 //

  1419 // Print the name of this method, including signature and some flags.

  1420 void ciMethod::print_name(outputStream* st) {

  1421   check_is_loaded();

  1422   GUARDED_VM_ENTRY(get_Method()->print_name(st);)

  1423 }

  1425 // ------------------------------------------------------------------

  1426 // ciMethod::print_short_name

  1427 //

  1428 // Print the name of this method, without signature.

  1429 void ciMethod::print_short_name(outputStream* st) {

  1430   if (is_loaded()) {

  1431     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););

  1432   } else {

  1433     // Fall back if method is not loaded.

  1434     holder()->print_name_on(st);

  1435     st->print("::");

  1436     name()->print_symbol_on(st);

  1437     if (WizardMode)

  1438       signature()->as_symbol()->print_symbol_on(st);

  1439   }

  1440 }

  1442 // ------------------------------------------------------------------

  1443 // ciMethod::print_impl

  1444 //

  1445 // Implementation of the print method.

  1446 void ciMethod::print_impl(outputStream* st) {

  1447   ciMetadata::print_impl(st);

  1448   st->print(" name=");

  1449   name()->print_symbol_on(st);

  1450   st->print(" holder=");

  1451   holder()->print_name_on(st);

  1452   st->print(" signature=");

  1453   signature()->as_symbol()->print_symbol_on(st);

  1454   if (is_loaded()) {

  1455     st->print(" loaded=true");

  1456     st->print(" arg_size=%d", arg_size());

  1457     st->print(" flags=");

  1458     flags().print_member_flags(st);

  1459   } else {

  1460     st->print(" loaded=false");

  1461   }

  1462 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/ci/ciMethod.cpp@04ff2f6cd0eb

src/share/vm/ci/ciMethod.cpp