jdk8-mips64-public/hotspot: src/share/vm/ci/ciMethod.cpp@710a3c8b516e

     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) : ciMetadata(h_m()) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    89   _code               = NULL;

    90   _exception_handlers = NULL;

    91   _liveness           = NULL;

    92   _method_blocks = NULL;

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

    94   _flow               = NULL;

    95   _bcea               = NULL;

    96 #endif // COMPILER2 || SHARK

    98   ciEnv *env = CURRENT_ENV;

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

   100     // 6328518 check hotswap conditions under the right lock.

   101     MutexLocker locker(Compile_lock);

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

   103       _is_c1_compilable = false;

   104       _is_c2_compilable = false;

   105     }

   106   } else {

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

   108   }

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

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

   112   } else {

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

   114     _can_be_statically_bound = false;

   115   }

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

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

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

   120     _can_be_statically_bound = true;

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

   122     _can_be_statically_bound = false;

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

   125   // These fields are always filled in.

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

   127   _holder = env->get_instance_klass(h_m()->method_holder());

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

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

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

   131   _method_data = NULL;

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

   133   if (ProfileInterpreter || TieredCompilation) {

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

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

   136     _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;

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

   138   } else {

   139     _interpreter_invocation_count = 0;

   140     _interpreter_throwout_count = 0;

   141   }

   142   if (_interpreter_invocation_count == 0)

   143     _interpreter_invocation_count = 1;

   144   _instructions_size = -1;

   145 #ifdef ASSERT

   146   if (ReplayCompiles) {

   147     ciReplay::initialize(this);

   148   }

   149 #endif

   150 }

   153 // ------------------------------------------------------------------

   154 // ciMethod::ciMethod

   155 //

   156 // Unloaded method.

   157 ciMethod::ciMethod(ciInstanceKlass* holder,

   158                    ciSymbol*        name,

   159                    ciSymbol*        signature,

   160                    ciInstanceKlass* accessor) :

   161   ciMetadata((Metadata*)NULL),

   162   _name(                   name),

   163   _holder(                 holder),

   164   _intrinsic_id(           vmIntrinsics::_none),

   165   _liveness(               NULL),

   166   _can_be_statically_bound(false),

   167   _method_blocks(          NULL),

   168   _method_data(            NULL)

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

   170   ,

   171   _flow(                   NULL),

   172   _bcea(                   NULL),

   173   _instructions_size(-1)

   174 #endif // COMPILER2 || SHARK

   175 {

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

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

   178   // sites) so we pass the accessor.

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

   180 }

   183 // ------------------------------------------------------------------

   184 // ciMethod::load_code

   185 //

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

   187 void ciMethod::load_code() {

   188   VM_ENTRY_MARK;

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

   191   Method* me = get_Method();

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

   194   // Load the bytecodes.

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

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

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

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

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

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

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

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

   204       }

   205     }

   206   }

   208   // And load the exception table.

   209   ExceptionTable exc_table(me);

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

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

   213   // an exception escapes the method.  See ciExceptionHandlerStream

   214   // for details.

   215   _exception_handlers =

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

   217                                          * (_handler_count + 1));

   218   if (_handler_count > 0) {

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

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

   221                                 holder(),

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

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

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

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

   226     }

   227   }

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

   230   // of exceptional exit.

   231   _exception_handlers[_handler_count] =

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

   234   if (CIPrintMethodCodes) {

   235     print_codes();

   236   }

   237 }

   240 // ------------------------------------------------------------------

   241 // ciMethod::has_linenumber_table

   242 //

   243 // length unknown until decompression

   244 bool    ciMethod::has_linenumber_table() const {

   245   check_is_loaded();

   246   VM_ENTRY_MARK;

   247   return get_Method()->has_linenumber_table();

   248 }

   251 // ------------------------------------------------------------------

   252 // ciMethod::compressed_linenumber_table

   253 u_char* ciMethod::compressed_linenumber_table() const {

   254   check_is_loaded();

   255   VM_ENTRY_MARK;

   256   return get_Method()->compressed_linenumber_table();

   257 }

   260 // ------------------------------------------------------------------

   261 // ciMethod::line_number_from_bci

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

   263   check_is_loaded();

   264   VM_ENTRY_MARK;

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

   266 }

   269 // ------------------------------------------------------------------

   270 // ciMethod::vtable_index

   271 //

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

   273 int ciMethod::vtable_index() {

   274   check_is_loaded();

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

   276   VM_ENTRY_MARK;

   277   return get_Method()->vtable_index();

   278 }

   281 #ifdef SHARK

   282 // ------------------------------------------------------------------

   283 // ciMethod::itable_index

   284 //

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

   286 int ciMethod::itable_index() {

   287   check_is_loaded();

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

   289   VM_ENTRY_MARK;

   290   Method* m = get_Method();

   291   if (!m->has_itable_index())

   292     return Method::nonvirtual_vtable_index;

   293   return m->itable_index();

   294 }

   295 #endif // SHARK

   298 // ------------------------------------------------------------------

   299 // ciMethod::native_entry

   300 //

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

   302 address ciMethod::native_entry() {

   303   check_is_loaded();

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

   305   VM_ENTRY_MARK;

   306   Method* method = get_Method();

   307   address entry = method->native_function();

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

   309   return entry;

   310 }

   313 // ------------------------------------------------------------------

   314 // ciMethod::interpreter_entry

   315 //

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

   317 address ciMethod::interpreter_entry() {

   318   check_is_loaded();

   319   VM_ENTRY_MARK;

   320   methodHandle mh(THREAD, get_Method());

   321   return Interpreter::entry_for_method(mh);

   322 }

   325 // ------------------------------------------------------------------

   326 // ciMethod::uses_balanced_monitors

   327 //

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

   329 bool ciMethod::has_balanced_monitors() {

   330   check_is_loaded();

   331   if (_balanced_monitors) return true;

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

   334   VM_ENTRY_MARK;

   335   methodHandle method(THREAD, get_Method());

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

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

   339   // monitor-matching analysis.

   340   if (method->guaranteed_monitor_matching()) {

   341     _balanced_monitors = true;

   342     return true;

   343   }

   345   {

   346     EXCEPTION_MARK;

   347     ResourceMark rm(THREAD);

   348     GeneratePairingInfo gpi(method);

   349     gpi.compute_map(CATCH);

   350     if (!gpi.monitor_safe()) {

   351       return false;

   352     }

   353     method->set_guaranteed_monitor_matching();

   354     _balanced_monitors = true;

   355   }

   356   return true;

   357 }

   360 // ------------------------------------------------------------------

   361 // ciMethod::get_flow_analysis

   362 ciTypeFlow* ciMethod::get_flow_analysis() {

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

   364   if (_flow == NULL) {

   365     ciEnv* env = CURRENT_ENV;

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

   367     _flow->do_flow();

   368   }

   369   return _flow;

   370 #else // COMPILER2 || SHARK

   371   ShouldNotReachHere();

   372   return NULL;

   373 #endif // COMPILER2 || SHARK

   374 }

   377 // ------------------------------------------------------------------

   378 // ciMethod::get_osr_flow_analysis

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

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

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

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

   383   ciEnv* env = CURRENT_ENV;

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

   385   flow->do_flow();

   386   return flow;

   387 #else // COMPILER2 || SHARK

   388   ShouldNotReachHere();

   389   return NULL;

   390 #endif // COMPILER2 || SHARK

   391 }

   393 // ------------------------------------------------------------------

   394 // ciMethod::raw_liveness_at_bci

   395 //

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

   397 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) {

   398   check_is_loaded();

   399   if (_liveness == NULL) {

   400     // Create the liveness analyzer.

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

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

   403     _liveness->compute_liveness();

   404   }

   405   return _liveness->get_liveness_at(bci);

   406 }

   408 // ------------------------------------------------------------------

   409 // ciMethod::liveness_at_bci

   410 //

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

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

   413 // information.

   414 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {

   415   MethodLivenessResult result = raw_liveness_at_bci(bci);

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

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

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

   419   }

   420   return result;

   421 }

   423 // ciMethod::live_local_oops_at_bci

   424 //

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

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

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

   428 // guard against conservative result from MethodLiveness making us

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

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

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

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

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

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

   435 // OSR when loading the locals.

   437 BitMap ciMethod::live_local_oops_at_bci(int bci) {

   438   VM_ENTRY_MARK;

   439   InterpreterOopMap mask;

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

   441   int mask_size = max_locals();

   442   BitMap result(mask_size);

   443   result.clear();

   444   int i;

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

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

   447   }

   448   return result;

   449 }

   452 #ifdef COMPILER1

   453 // ------------------------------------------------------------------

   454 // ciMethod::bci_block_start

   455 //

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

   457 const BitMap ciMethod::bci_block_start() {

   458   check_is_loaded();

   459   if (_liveness == NULL) {

   460     // Create the liveness analyzer.

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

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

   463     _liveness->compute_liveness();

   464   }

   466   return _liveness->get_bci_block_start();

   467 }

   468 #endif // COMPILER1

   471 // ------------------------------------------------------------------

   472 // ciMethod::call_profile_at_bci

   473 //

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

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

   476 ciCallProfile ciMethod::call_profile_at_bci(int bci) {

   477   ResourceMark rm;

   478   ciCallProfile result;

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

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

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

   482       // Every profiled call site has a counter.

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

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

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

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

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

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

   490         int receivers_count_total = 0;

   491         int morphism = 0;

   492         // Precompute morphism for the possible fixup

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

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

   495           if (receiver == NULL)  continue;

   496           morphism++;

   497         }

   498         int epsilon = 0;

   499         if (TieredCompilation && ProfileInterpreter) {

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

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

   502           // increment the count. Detect this case.

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

   504             epsilon = count;

   505             count = 0;

   506           }

   507         }

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

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

   510           if (receiver == NULL)  continue;

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

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

   513           receivers_count_total += rcount;

   514           // Add the receiver to result data.

   515           result.add_receiver(receiver, rcount);

   516           // If we extend profiling to record methods,

   517           // we will set result._method also.

   518         }

   519         // Determine call site's morphism.

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

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

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

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

   524            // The morphism <= MorphismLimit.

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

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

   527 #ifdef ASSERT

   528              if (count > 0) {

   529                this->print_short_name(tty);

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

   531                this->print_codes();

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

   533              }

   534 #endif

   535              result._morphism = morphism;

   536            }

   537         }

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

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

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

   541         // receiver's counts.

   542         if (count >= 0) {

   543           count += receivers_count_total;

   544         }

   545       }

   546       result._count = count;

   547     }

   548   }

   549   return result;

   550 }

   552 // ------------------------------------------------------------------

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

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

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

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

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

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

   559   int i = _limit;

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

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

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

   563   }

   564   _receiver[i] = receiver;

   565   _receiver_count[i] = receiver_count;

   566   if (_limit < MorphismLimit) _limit++;

   567 }

   570 void ciMethod::assert_virtual_call_type_ok(int bci) {

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

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

   573 }

   575 void ciMethod::assert_call_type_ok(int bci) {

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

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

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

   579 }

   581 /**

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

   583  * call at bci bci

   584  *

   585  * @param bci  bci of the call

   586  * @param i    argument number

   587  * @return     profiled type

   588  *

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

   590  * at least for now.

   591  */

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

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

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

   595     if (data != NULL) {

   596       if (data->is_VirtualCallTypeData()) {

   597         assert_virtual_call_type_ok(bci);

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

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

   600           return NULL;

   601         }

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

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

   604           return type;

   605         }

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

   607         assert_call_type_ok(bci);

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

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

   610           return NULL;

   611         }

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

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

   614           return type;

   615         }

   616       }

   617     }

   618   }

   619   return NULL;

   620 }

   622 /**

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

   624  * the call at bci bci

   625  *

   626  * @param bci  bci of the call

   627  * @return     profiled type

   628  *

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

   630  * at least for now.

   631  */

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

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

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

   635     if (data != NULL) {

   636       if (data->is_VirtualCallTypeData()) {

   637         assert_virtual_call_type_ok(bci);

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

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

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

   641           return type;

   642         }

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

   644         assert_call_type_ok(bci);

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

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

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

   648           return type;

   649         }

   650       }

   651     }

   652   }

   653   return NULL;

   654 }

   656 /**

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

   658  *

   659  * @param i    parameter number

   660  * @return     profiled type

   661  *

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

   663  * at least for now.

   664  */

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

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

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

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

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

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

   671         return type;

   672       }

   673     }

   674   }

   675   return NULL;

   676 }

   679 // ------------------------------------------------------------------

   680 // ciMethod::find_monomorphic_target

   681 //

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

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

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

   685 // The returned method is never abstract.

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

   687 // via assert_unique_concrete_method or assert_leaf_type.

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

   689                                             ciInstanceKlass* callee_holder,

   690                                             ciInstanceKlass* actual_recv) {

   691   check_is_loaded();

   693   if (actual_recv->is_interface()) {

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

   695     return NULL;

   696   }

   698   ciMethod* root_m = resolve_invoke(caller, actual_recv);

   699   if (root_m == NULL) {

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

   701     return NULL;

   702   }

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

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

   707   // Is it private or final?

   708   if (root_m->can_be_statically_bound()) {

   709     return root_m;

   710   }

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

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

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

   715     return root_m;

   716   }

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

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

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

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

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

   724   if (!UseCHA)  return NULL;

   726   VM_ENTRY_MARK;

   728   // Disable CHA for default methods for now

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

   730     return NULL;

   731   }

   733   methodHandle target;

   734   {

   735     MutexLocker locker(Compile_lock);

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

   737     target = Dependencies::find_unique_concrete_method(context,

   738                                                        root_m->get_Method());

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

   740   }

   742 #ifndef PRODUCT

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

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

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

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

   747     target->print_short_name(tty);

   748     tty->cr();

   749   }

   750 #endif //PRODUCT

   752   if (target() == NULL) {

   753     return NULL;

   754   }

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

   756     return root_m;

   757   }

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

   759       !root_m->is_protected()) {

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

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

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

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

   764     // methods in other packages.

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

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

   767     return NULL;

   768   }

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

   770 }

   772 // ------------------------------------------------------------------

   773 // ciMethod::resolve_invoke

   774 //

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

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

   777 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {

   778    check_is_loaded();

   779    VM_ENTRY_MARK;

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

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

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

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

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

   787    methodHandle m;

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

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

   790    if (h_recv->oop_is_array()

   791         ||

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

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

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

   795      } else {

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

   797      }

   798    }

   800    if (m.is_null()) {

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

   802      return NULL;

   803    }

   805    ciMethod* result = this;

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

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

   808    }

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

   811    // optimizable or interesting.

   812    if (result->is_abstract()) {

   813      return NULL;

   814    } else {

   815      return result;

   816    }

   817 }

   819 // ------------------------------------------------------------------

   820 // ciMethod::resolve_vtable_index

   821 //

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

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

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

   825    check_is_loaded();

   827    int vtable_index = Method::invalid_vtable_index;

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

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

   830    if (!receiver->is_interface()

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

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

   833      VM_ENTRY_MARK;

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

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

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

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

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

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

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

   843        vtable_index = Method::invalid_vtable_index;

   844      }

   845    }

   847    return vtable_index;

   848 }

   850 // ------------------------------------------------------------------

   851 // ciMethod::interpreter_call_site_count

   852 int ciMethod::interpreter_call_site_count(int bci) {

   853   if (method_data() != NULL) {

   854     ResourceMark rm;

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

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

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

   858     }

   859   }

   860   return -1;  // unknown

   861 }

   863 // ------------------------------------------------------------------

   864 // ciMethod::get_field_at_bci

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

   866   ciBytecodeStream iter(this);

   867   iter.reset_to_bci(bci);

   868   iter.next();

   869   return iter.get_field(will_link);

   870 }

   872 // ------------------------------------------------------------------

   873 // ciMethod::get_method_at_bci

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

   875   ciBytecodeStream iter(this);

   876   iter.reset_to_bci(bci);

   877   iter.next();

   878   return iter.get_method(will_link, declared_signature);

   879 }

   881 // ------------------------------------------------------------------

   882 // Adjust a CounterData count to be commensurate with

   883 // interpreter_invocation_count.  If the MDO exists for

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

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

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

   887 // invocation counts in methods.

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

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

   890     int counter_life;

   891     int method_life = interpreter_invocation_count();

   892     if (TieredCompilation) {

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

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

   895     } else {

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

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

   898       counter_life = current_mileage - creation_mileage;

   899     }

   901     // counter_life due to backedge_counter could be > method_life

   902     if (counter_life > method_life)

   903       counter_life = method_life;

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

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

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

   907     }

   908   }

   909   return count;

   910 }

   913 // ------------------------------------------------------------------

   914 // ciMethod::is_special_get_caller_class_method

   915 //

   916 bool ciMethod::is_ignored_by_security_stack_walk() const {

   917   check_is_loaded();

   918   VM_ENTRY_MARK;

   919   return get_Method()->is_ignored_by_security_stack_walk();

   920 }

   923 // ------------------------------------------------------------------

   924 // invokedynamic support

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

   927 // ciMethod::is_method_handle_intrinsic

   928 //

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

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

   931 bool ciMethod::is_method_handle_intrinsic() const {

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

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

   934           MethodHandles::is_signature_polymorphic_intrinsic(iid));

   935 }

   937 // ------------------------------------------------------------------

   938 // ciMethod::is_compiled_lambda_form

   939 //

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

   941 // These are built by Java code.

   942 bool ciMethod::is_compiled_lambda_form() const {

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

   944   return iid == vmIntrinsics::_compiledLambdaForm;

   945 }

   947 // ------------------------------------------------------------------

   948 // ciMethod::has_member_arg

   949 //

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

   951 // These are built by the JVM.

   952 bool ciMethod::has_member_arg() const {

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

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

   955           MethodHandles::has_member_arg(iid));

   956 }

   958 // ------------------------------------------------------------------

   959 // ciMethod::ensure_method_data

   960 //

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

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

   963 bool ciMethod::ensure_method_data(methodHandle h_m) {

   964   EXCEPTION_CONTEXT;

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

   966     return true;

   967   }

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

   969     Method::build_interpreter_method_data(h_m, THREAD);

   970     if (HAS_PENDING_EXCEPTION) {

   971       CLEAR_PENDING_EXCEPTION;

   972     }

   973   }

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

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

   976     _method_data->load_data();

   977     return true;

   978   } else {

   979     _method_data = CURRENT_ENV->get_empty_methodData();

   980     return false;

   981   }

   982 }

   984 // public, retroactive version

   985 bool ciMethod::ensure_method_data() {

   986   bool result = true;

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

   988     GUARDED_VM_ENTRY({

   989       result = ensure_method_data(get_Method());

   990     });

   991   }

   992   return result;

   993 }

   996 // ------------------------------------------------------------------

   997 // ciMethod::method_data

   998 //

   999 ciMethodData* ciMethod::method_data() {

  1000   if (_method_data != NULL) {

  1001     return _method_data;

  1002   }

  1003   VM_ENTRY_MARK;

  1004   ciEnv* env = CURRENT_ENV;

  1005   Thread* my_thread = JavaThread::current();

  1006   methodHandle h_m(my_thread, get_Method());

  1008   if (h_m()->method_data() != NULL) {

  1009     _method_data = CURRENT_ENV->get_method_data(h_m()->method_data());

  1010     _method_data->load_data();

  1011   } else {

  1012     _method_data = CURRENT_ENV->get_empty_methodData();

  1013   }

  1014   return _method_data;

  1016 }

  1018 // ------------------------------------------------------------------

  1019 // ciMethod::method_data_or_null

  1020 // Returns a pointer to ciMethodData if MDO exists on the VM side,

  1021 // NULL otherwise.

  1022 ciMethodData* ciMethod::method_data_or_null() {

  1023   ciMethodData *md = method_data();

  1024   if (md->is_empty()) {

  1025     return NULL;

  1026   }

  1027   return md;

  1028 }

  1030 // ------------------------------------------------------------------

  1031 // ciMethod::ensure_method_counters

  1032 //

  1033 MethodCounters* ciMethod::ensure_method_counters() {

  1034   check_is_loaded();

  1035   VM_ENTRY_MARK;

  1036   methodHandle mh(THREAD, get_Method());

  1037   MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL);

  1038   return method_counters;

  1039 }

  1041 // ------------------------------------------------------------------

  1042 // ciMethod::should_exclude

  1043 //

  1044 // Should this method be excluded from compilation?

  1045 bool ciMethod::should_exclude() {

  1046   check_is_loaded();

  1047   VM_ENTRY_MARK;

  1048   methodHandle mh(THREAD, get_Method());

  1049   bool ignore;

  1050   return CompilerOracle::should_exclude(mh, ignore);

  1051 }

  1053 // ------------------------------------------------------------------

  1054 // ciMethod::should_inline

  1055 //

  1056 // Should this method be inlined during compilation?

  1057 bool ciMethod::should_inline() {

  1058   check_is_loaded();

  1059   VM_ENTRY_MARK;

  1060   methodHandle mh(THREAD, get_Method());

  1061   return CompilerOracle::should_inline(mh);

  1062 }

  1064 // ------------------------------------------------------------------

  1065 // ciMethod::should_not_inline

  1066 //

  1067 // Should this method be disallowed from inlining during compilation?

  1068 bool ciMethod::should_not_inline() {

  1069   check_is_loaded();

  1070   VM_ENTRY_MARK;

  1071   methodHandle mh(THREAD, get_Method());

  1072   return CompilerOracle::should_not_inline(mh);

  1073 }

  1075 // ------------------------------------------------------------------

  1076 // ciMethod::should_print_assembly

  1077 //

  1078 // Should the compiler print the generated code for this method?

  1079 bool ciMethod::should_print_assembly() {

  1080   check_is_loaded();

  1081   VM_ENTRY_MARK;

  1082   methodHandle mh(THREAD, get_Method());

  1083   return CompilerOracle::should_print(mh);

  1084 }

  1086 // ------------------------------------------------------------------

  1087 // ciMethod::break_at_execute

  1088 //

  1089 // Should the compiler insert a breakpoint into the generated code

  1090 // method?

  1091 bool ciMethod::break_at_execute() {

  1092   check_is_loaded();

  1093   VM_ENTRY_MARK;

  1094   methodHandle mh(THREAD, get_Method());

  1095   return CompilerOracle::should_break_at(mh);

  1096 }

  1098 // ------------------------------------------------------------------

  1099 // ciMethod::has_option

  1100 //

  1101 bool ciMethod::has_option(const char* option) {

  1102   check_is_loaded();

  1103   VM_ENTRY_MARK;

  1104   methodHandle mh(THREAD, get_Method());

  1105   return CompilerOracle::has_option_string(mh, option);

  1106 }

  1108 // ------------------------------------------------------------------

  1109 // ciMethod::can_be_compiled

  1110 //

  1111 // Have previous compilations of this method succeeded?

  1112 bool ciMethod::can_be_compiled() {

  1113   check_is_loaded();

  1114   ciEnv* env = CURRENT_ENV;

  1115   if (is_c1_compile(env->comp_level())) {

  1116     return _is_c1_compilable;

  1117   }

  1118   return _is_c2_compilable;

  1119 }

  1121 // ------------------------------------------------------------------

  1122 // ciMethod::set_not_compilable

  1123 //

  1124 // Tell the VM that this method cannot be compiled at all.

  1125 void ciMethod::set_not_compilable(const char* reason) {

  1126   check_is_loaded();

  1127   VM_ENTRY_MARK;

  1128   ciEnv* env = CURRENT_ENV;

  1129   if (is_c1_compile(env->comp_level())) {

  1130     _is_c1_compilable = false;

  1131   } else {

  1132     _is_c2_compilable = false;

  1133   }

  1134   get_Method()->set_not_compilable(env->comp_level(), true, reason);

  1135 }

  1137 // ------------------------------------------------------------------

  1138 // ciMethod::can_be_osr_compiled

  1139 //

  1140 // Have previous compilations of this method succeeded?

  1141 //

  1142 // Implementation note: the VM does not currently keep track

  1143 // of failed OSR compilations per bci.  The entry_bci parameter

  1144 // is currently unused.

  1145 bool ciMethod::can_be_osr_compiled(int entry_bci) {

  1146   check_is_loaded();

  1147   VM_ENTRY_MARK;

  1148   ciEnv* env = CURRENT_ENV;

  1149   return !get_Method()->is_not_osr_compilable(env->comp_level());

  1150 }

  1152 // ------------------------------------------------------------------

  1153 // ciMethod::has_compiled_code

  1154 bool ciMethod::has_compiled_code() {

  1155   return instructions_size() > 0;

  1156 }

  1158 int ciMethod::comp_level() {

  1159   check_is_loaded();

  1160   VM_ENTRY_MARK;

  1161   nmethod* nm = get_Method()->code();

  1162   if (nm != NULL) return nm->comp_level();

  1163   return 0;

  1164 }

  1166 int ciMethod::highest_osr_comp_level() {

  1167   check_is_loaded();

  1168   VM_ENTRY_MARK;

  1169   return get_Method()->highest_osr_comp_level();

  1170 }

  1172 // ------------------------------------------------------------------

  1173 // ciMethod::code_size_for_inlining

  1174 //

  1175 // Code size for inlining decisions.  This method returns a code

  1176 // size of 1 for methods which has the ForceInline annotation.

  1177 int ciMethod::code_size_for_inlining() {

  1178   check_is_loaded();

  1179   if (get_Method()->force_inline()) {

  1180     return 1;

  1181   }

  1182   return code_size();

  1183 }

  1185 // ------------------------------------------------------------------

  1186 // ciMethod::instructions_size

  1187 //

  1188 // This is a rough metric for "fat" methods, compared before inlining

  1189 // with InlineSmallCode.  The CodeBlob::code_size accessor includes

  1190 // junk like exception handler, stubs, and constant table, which are

  1191 // not highly relevant to an inlined method.  So we use the more

  1192 // specific accessor nmethod::insts_size.

  1193 int ciMethod::instructions_size() {

  1194   if (_instructions_size == -1) {

  1195     GUARDED_VM_ENTRY(

  1196                      nmethod* code = get_Method()->code();

  1197                      if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) {

  1198                        _instructions_size = code->insts_end() - code->verified_entry_point();

  1199                      } else {

  1200                        _instructions_size = 0;

  1201                      }

  1202                      );

  1203   }

  1204   return _instructions_size;

  1205 }

  1207 // ------------------------------------------------------------------

  1208 // ciMethod::log_nmethod_identity

  1209 void ciMethod::log_nmethod_identity(xmlStream* log) {

  1210   GUARDED_VM_ENTRY(

  1211     nmethod* code = get_Method()->code();

  1212     if (code != NULL) {

  1213       code->log_identity(log);

  1214     }

  1215   )

  1216 }

  1218 // ------------------------------------------------------------------

  1219 // ciMethod::is_not_reached

  1220 bool ciMethod::is_not_reached(int bci) {

  1221   check_is_loaded();

  1222   VM_ENTRY_MARK;

  1223   return Interpreter::is_not_reached(

  1224                methodHandle(THREAD, get_Method()), bci);

  1225 }

  1227 // ------------------------------------------------------------------

  1228 // ciMethod::was_never_executed

  1229 bool ciMethod::was_executed_more_than(int times) {

  1230   VM_ENTRY_MARK;

  1231   return get_Method()->was_executed_more_than(times);

  1232 }

  1234 // ------------------------------------------------------------------

  1235 // ciMethod::has_unloaded_classes_in_signature

  1236 bool ciMethod::has_unloaded_classes_in_signature() {

  1237   VM_ENTRY_MARK;

  1238   {

  1239     EXCEPTION_MARK;

  1240     methodHandle m(THREAD, get_Method());

  1241     bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);

  1242     if( HAS_PENDING_EXCEPTION ) {

  1243       CLEAR_PENDING_EXCEPTION;

  1244       return true;     // Declare that we may have unloaded classes

  1245     }

  1246     return has_unloaded;

  1247   }

  1248 }

  1250 // ------------------------------------------------------------------

  1251 // ciMethod::is_klass_loaded

  1252 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {

  1253   VM_ENTRY_MARK;

  1254   return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved);

  1255 }

  1257 // ------------------------------------------------------------------

  1258 // ciMethod::check_call

  1259 bool ciMethod::check_call(int refinfo_index, bool is_static) const {

  1260   // This method is used only in C2 from InlineTree::ok_to_inline,

  1261   // and is only used under -Xcomp or -XX:CompileTheWorld.

  1262   // It appears to fail when applied to an invokeinterface call site.

  1263   // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points.

  1264   VM_ENTRY_MARK;

  1265   {

  1266     EXCEPTION_MARK;

  1267     HandleMark hm(THREAD);

  1268     constantPoolHandle pool (THREAD, get_Method()->constants());

  1269     methodHandle spec_method;

  1270     KlassHandle  spec_klass;

  1271     Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual);

  1272     LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD);

  1273     if (HAS_PENDING_EXCEPTION) {

  1274       CLEAR_PENDING_EXCEPTION;

  1275       return false;

  1276     } else {

  1277       return (spec_method->is_static() == is_static);

  1278     }

  1279   }

  1280   return false;

  1281 }

  1283 // ------------------------------------------------------------------

  1284 // ciMethod::print_codes

  1285 //

  1286 // Print the bytecodes for this method.

  1287 void ciMethod::print_codes_on(outputStream* st) {

  1288   check_is_loaded();

  1289   GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);)

  1290 }

  1293 #define FETCH_FLAG_FROM_VM(flag_accessor) { \

  1294   check_is_loaded(); \

  1295   VM_ENTRY_MARK; \

  1296   return get_Method()->flag_accessor(); \

  1297 }

  1299 bool ciMethod::is_empty_method() const {         FETCH_FLAG_FROM_VM(is_empty_method); }

  1300 bool ciMethod::is_vanilla_constructor() const {  FETCH_FLAG_FROM_VM(is_vanilla_constructor); }

  1301 bool ciMethod::has_loops      () const {         FETCH_FLAG_FROM_VM(has_loops); }

  1302 bool ciMethod::has_jsrs       () const {         FETCH_FLAG_FROM_VM(has_jsrs);  }

  1303 bool ciMethod::is_accessor    () const {         FETCH_FLAG_FROM_VM(is_accessor); }

  1304 bool ciMethod::is_initializer () const {         FETCH_FLAG_FROM_VM(is_initializer); }

  1306 bool ciMethod::is_boxing_method() const {

  1307   if (holder()->is_box_klass()) {

  1308     switch (intrinsic_id()) {

  1309       case vmIntrinsics::_Boolean_valueOf:

  1310       case vmIntrinsics::_Byte_valueOf:

  1311       case vmIntrinsics::_Character_valueOf:

  1312       case vmIntrinsics::_Short_valueOf:

  1313       case vmIntrinsics::_Integer_valueOf:

  1314       case vmIntrinsics::_Long_valueOf:

  1315       case vmIntrinsics::_Float_valueOf:

  1316       case vmIntrinsics::_Double_valueOf:

  1317         return true;

  1318       default:

  1319         return false;

  1320     }

  1321   }

  1322   return false;

  1323 }

  1325 bool ciMethod::is_unboxing_method() const {

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

  1327     switch (intrinsic_id()) {

  1328       case vmIntrinsics::_booleanValue:

  1329       case vmIntrinsics::_byteValue:

  1330       case vmIntrinsics::_charValue:

  1331       case vmIntrinsics::_shortValue:

  1332       case vmIntrinsics::_intValue:

  1333       case vmIntrinsics::_longValue:

  1334       case vmIntrinsics::_floatValue:

  1335       case vmIntrinsics::_doubleValue:

  1336         return true;

  1337       default:

  1338         return false;

  1339     }

  1340   }

  1341   return false;

  1342 }

  1344 BCEscapeAnalyzer  *ciMethod::get_bcea() {

  1345 #ifdef COMPILER2

  1346   if (_bcea == NULL) {

  1347     _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);

  1348   }

  1349   return _bcea;

  1350 #else // COMPILER2

  1351   ShouldNotReachHere();

  1352   return NULL;

  1353 #endif // COMPILER2

  1354 }

  1356 ciMethodBlocks  *ciMethod::get_method_blocks() {

  1357   Arena *arena = CURRENT_ENV->arena();

  1358   if (_method_blocks == NULL) {

  1359     _method_blocks = new (arena) ciMethodBlocks(arena, this);

  1360   }

  1361   return _method_blocks;

  1362 }

  1364 #undef FETCH_FLAG_FROM_VM

  1366 void ciMethod::dump_name_as_ascii(outputStream* st) {

  1367   Method* method = get_Method();

  1368   st->print("%s %s %s",

  1369             method->klass_name()->as_quoted_ascii(),

  1370             method->name()->as_quoted_ascii(),

  1371             method->signature()->as_quoted_ascii());

  1372 }

  1374 void ciMethod::dump_replay_data(outputStream* st) {

  1375   ResourceMark rm;

  1376   Method* method = get_Method();

  1377   MethodCounters* mcs = method->method_counters();

  1378   st->print("ciMethod ");

  1379   dump_name_as_ascii(st);

  1380   st->print_cr(" %d %d %d %d %d",

  1381                mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(),

  1382                mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(),

  1383                interpreter_invocation_count(),

  1384                interpreter_throwout_count(),

  1385                _instructions_size);

  1386 }

  1388 // ------------------------------------------------------------------

  1389 // ciMethod::print_codes

  1390 //

  1391 // Print a range of the bytecodes for this method.

  1392 void ciMethod::print_codes_on(int from, int to, outputStream* st) {

  1393   check_is_loaded();

  1394   GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);)

  1395 }

  1397 // ------------------------------------------------------------------

  1398 // ciMethod::print_name

  1399 //

  1400 // Print the name of this method, including signature and some flags.

  1401 void ciMethod::print_name(outputStream* st) {

  1402   check_is_loaded();

  1403   GUARDED_VM_ENTRY(get_Method()->print_name(st);)

  1404 }

  1406 // ------------------------------------------------------------------

  1407 // ciMethod::print_short_name

  1408 //

  1409 // Print the name of this method, without signature.

  1410 void ciMethod::print_short_name(outputStream* st) {

  1411   if (is_loaded()) {

  1412     GUARDED_VM_ENTRY(get_Method()->print_short_name(st););

  1413   } else {

  1414     // Fall back if method is not loaded.

  1415     holder()->print_name_on(st);

  1416     st->print("::");

  1417     name()->print_symbol_on(st);

  1418     if (WizardMode)

  1419       signature()->as_symbol()->print_symbol_on(st);

  1420   }

  1421 }

  1423 // ------------------------------------------------------------------

  1424 // ciMethod::print_impl

  1425 //

  1426 // Implementation of the print method.

  1427 void ciMethod::print_impl(outputStream* st) {

  1428   ciMetadata::print_impl(st);

  1429   st->print(" name=");

  1430   name()->print_symbol_on(st);

  1431   st->print(" holder=");

  1432   holder()->print_name_on(st);

  1433   st->print(" signature=");

  1434   signature()->as_symbol()->print_symbol_on(st);

  1435   if (is_loaded()) {

  1436     st->print(" loaded=true");

  1437     st->print(" arg_size=%d", arg_size());

  1438     st->print(" flags=");

  1439     flags().print_member_flags(st);

  1440   } else {

  1441     st->print(" loaded=false");

  1442   }

  1443 }

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

src/share/vm/ci/ciMethod.cpp@710a3c8b516e

src/share/vm/ci/ciMethod.cpp