1 /*

     2  * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #include "precompiled.hpp"

    26 #include "classfile/systemDictionary.hpp"

    27 #include "classfile/vmSymbols.hpp"

    28 #include "code/nmethod.hpp"

    29 #include "compiler/compileBroker.hpp"

    30 #include "interpreter/interpreter.hpp"

    31 #include "interpreter/linkResolver.hpp"

    32 #include "memory/universe.inline.hpp"

    33 #include "oops/oop.inline.hpp"

    34 #include "prims/jniCheck.hpp"

    35 #include "runtime/compilationPolicy.hpp"

    36 #include "runtime/handles.inline.hpp"

    37 #include "runtime/interfaceSupport.hpp"

    38 #include "runtime/javaCalls.hpp"

    39 #include "runtime/mutexLocker.hpp"

    40 #include "runtime/os.inline.hpp"

    41 #include "runtime/signature.hpp"

    42 #include "runtime/stubRoutines.hpp"

    43 #include "runtime/thread.inline.hpp"

    44 #if INCLUDE_JVMCI

    45 #include "jvmci/jvmciJavaClasses.hpp"

    46 #include "jvmci/jvmciRuntime.hpp"

    47 #endif

    48 

    49 // -----------------------------------------------------

    50 // Implementation of JavaCallWrapper

    51 

    52 JavaCallWrapper::JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS) {

    53   JavaThread* thread = (JavaThread *)THREAD;

    54   bool clear_pending_exception = true;

    55 

    56   guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");

    57   assert(!thread->owns_locks(), "must release all locks when leaving VM");

    58   guarantee(thread->can_call_java(), "cannot make java calls from the native compiler");

    59   _result   = result;

    60 

    61   // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,

    62   // since it can potentially block.

    63   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);

    64 

    65   // After this, we are official in JavaCode. This needs to be done before we change any of the thread local

    66   // info, since we cannot find oops before the new information is set up completely.

    67   ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);

    68 

    69   // Make sure that we handle asynchronous stops and suspends _before_ we clear all thread state

    70   // in JavaCallWrapper::JavaCallWrapper(). This way, we can decide if we need to do any pd actions

    71   // to prepare for stop/suspend (flush register windows on sparcs, cache sp, or other state).

    72   if (thread->has_special_runtime_exit_condition()) {

    73     thread->handle_special_runtime_exit_condition();

    74     if (HAS_PENDING_EXCEPTION) {

    75       clear_pending_exception = false;

    76     }

    77   }

    78 

    79 

    80   // Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing

    81   // the JavaCallWrapper before the entry frame is on the stack.

    82   _callee_method = callee_method();

    83   _receiver = receiver();

    84 

    85 #ifdef CHECK_UNHANDLED_OOPS

    86   THREAD->allow_unhandled_oop(&_receiver);

    87 #endif // CHECK_UNHANDLED_OOPS

    88 

    89   _thread       = (JavaThread *)thread;

    90   _handles      = _thread->active_handles();    // save previous handle block & Java frame linkage

    91 

    92   // For the profiler, the last_Java_frame information in thread must always be in

    93   // legal state. We have no last Java frame if last_Java_sp == NULL so

    94   // the valid transition is to clear _last_Java_sp and then reset the rest of

    95   // the (platform specific) state.

    96 

    97   _anchor.copy(_thread->frame_anchor());

    98   _thread->frame_anchor()->clear();

    99 

   100   debug_only(_thread->inc_java_call_counter());

   101   _thread->set_active_handles(new_handles);     // install new handle block and reset Java frame linkage

   102 

   103   assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL");

   104 

   105   // clear any pending exception in thread (native calls start with no exception pending)

   106   if(clear_pending_exception) {

   107     _thread->clear_pending_exception();

   108   }

   109 

   110   if (_anchor.last_Java_sp() == NULL) {

   111     _thread->record_base_of_stack_pointer();

   112   }

   113 }

   114 

   115 

   116 JavaCallWrapper::~JavaCallWrapper() {

   117   assert(_thread == JavaThread::current(), "must still be the same thread");

   118 

   119   // restore previous handle block & Java frame linkage

   120   JNIHandleBlock *_old_handles = _thread->active_handles();

   121   _thread->set_active_handles(_handles);

   122 

   123   _thread->frame_anchor()->zap();

   124 

   125   debug_only(_thread->dec_java_call_counter());

   126 

   127   if (_anchor.last_Java_sp() == NULL) {

   128     _thread->set_base_of_stack_pointer(NULL);

   129   }

   130 

   131 

   132   // Old thread-local info. has been restored. We are not back in the VM.

   133   ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);

   134 

   135   // State has been restored now make the anchor frame visible for the profiler.

   136   // Do this after the transition because this allows us to put an assert

   137   // the Java->vm transition which checks to see that stack is not walkable

   138   // on sparc/ia64 which will catch violations of the reseting of last_Java_frame

   139   // invariants (i.e. _flags always cleared on return to Java)

   140 

   141   _thread->frame_anchor()->copy(&_anchor);

   142 

   143   // Release handles after we are marked as being inside the VM again, since this

   144   // operation might block

   145   JNIHandleBlock::release_block(_old_handles, _thread);

   146 }

   147 

   148 

   149 void JavaCallWrapper::oops_do(OopClosure* f) {

   150   f->do_oop((oop*)&_receiver);

   151   handles()->oops_do(f);

   152 }

   153 

   154 

   155 // Helper methods

   156 static BasicType runtime_type_from(JavaValue* result) {

   157   switch (result->get_type()) {

   158     case T_BOOLEAN: // fall through

   159     case T_CHAR   : // fall through

   160     case T_SHORT  : // fall through

   161     case T_INT    : // fall through

   162 #ifndef _LP64

   163     case T_OBJECT : // fall through

   164     case T_ARRAY  : // fall through

   165 #endif

   166     case T_BYTE   : // fall through

   167     case T_VOID   : return T_INT;

   168     case T_LONG   : return T_LONG;

   169     case T_FLOAT  : return T_FLOAT;

   170     case T_DOUBLE : return T_DOUBLE;

   171 #ifdef _LP64

   172     case T_ARRAY  : // fall through

   173     case T_OBJECT:  return T_OBJECT;

   174 #endif

   175     default:

   176       ShouldNotReachHere();

   177       return T_ILLEGAL;

   178   }

   179 }

   180 

   181 // ============ Virtual calls ============

   182 

   183 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {

   184   CallInfo callinfo;

   185   Handle receiver = args->receiver();

   186   Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();

   187   LinkInfo link_info(spec_klass, name, signature);

   188   LinkResolver::resolve_virtual_call(

   189           callinfo, receiver, recvrKlass, link_info, true, CHECK);

   190   methodHandle method = callinfo.selected_method();

   191   assert(method.not_null(), "should have thrown exception");

   192 

   193   // Invoke the method

   194   JavaCalls::call(result, method, args, CHECK);

   195 }

   196 

   197 

   198 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {

   199   JavaCallArguments args(receiver); // One oop argument

   200   call_virtual(result, spec_klass, name, signature, &args, CHECK);

   201 }

   202 

   203 

   204 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {

   205   JavaCallArguments args(receiver); // One oop argument

   206   args.push_oop(arg1);

   207   call_virtual(result, spec_klass, name, signature, &args, CHECK);

   208 }

   209 

   210 

   211 

   212 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {

   213   JavaCallArguments args(receiver); // One oop argument

   214   args.push_oop(arg1);

   215   args.push_oop(arg2);

   216   call_virtual(result, spec_klass, name, signature, &args, CHECK);

   217 }

   218 

   219 

   220 // ============ Special calls ============

   221 

   222 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {

   223   CallInfo callinfo;

   224   LinkInfo link_info(klass, name, signature);

   225   LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);

   226   methodHandle method = callinfo.selected_method();

   227   assert(method.not_null(), "should have thrown exception");

   228 

   229   // Invoke the method

   230   JavaCalls::call(result, method, args, CHECK);

   231 }

   232 

   233 

   234 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {

   235   JavaCallArguments args(receiver); // One oop argument

   236   call_special(result, klass, name, signature, &args, CHECK);

   237 }

   238 

   239 

   240 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {

   241   JavaCallArguments args(receiver); // One oop argument

   242   args.push_oop(arg1);

   243   call_special(result, klass, name, signature, &args, CHECK);

   244 }

   245 

   246 

   247 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {

   248   JavaCallArguments args(receiver); // One oop argument

   249   args.push_oop(arg1);

   250   args.push_oop(arg2);

   251   call_special(result, klass, name, signature, &args, CHECK);

   252 }

   253 

   254 

   255 // ============ Static calls ============

   256 

   257 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {

   258   CallInfo callinfo;

   259   LinkInfo link_info(klass, name, signature);

   260   LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);

   261   methodHandle method = callinfo.selected_method();

   262   assert(method.not_null(), "should have thrown exception");

   263 

   264   // Invoke the method

   265   JavaCalls::call(result, method, args, CHECK);

   266 }

   267 

   268 

   269 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {

   270   JavaCallArguments args; // No argument

   271   call_static(result, klass, name, signature, &args, CHECK);

   272 }

   273 

   274 

   275 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {

   276   JavaCallArguments args(arg1); // One oop argument

   277   call_static(result, klass, name, signature, &args, CHECK);

   278 }

   279 

   280 

   281 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {

   282   JavaCallArguments args; // One oop argument

   283   args.push_oop(arg1);

   284   args.push_oop(arg2);

   285   call_static(result, klass, name, signature, &args, CHECK);

   286 }

   287 

   288 

   289 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) {

   290   JavaCallArguments args; // One oop argument

   291   args.push_oop(arg1);

   292   args.push_oop(arg2);

   293   args.push_oop(arg3);

   294   call_static(result, klass, name, signature, &args, CHECK);

   295 }

   296 

   297 // -------------------------------------------------

   298 // Implementation of JavaCalls (low level)

   299 

   300 

   301 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {

   302   // Check if we need to wrap a potential OS exception handler around thread

   303   // This is used for e.g. Win32 structured exception handlers

   304   assert(THREAD->is_Java_thread(), "only JavaThreads can make JavaCalls");

   305   // Need to wrap each and every time, since there might be native code down the

   306   // stack that has installed its own exception handlers

   307   os::os_exception_wrapper(call_helper, result, method, args, THREAD);

   308 }

   309 

   310 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {

   311 

   312   JavaThread* thread = (JavaThread*)THREAD;

   313   assert(thread->is_Java_thread(), "must be called by a java thread");

   314   assert(method.not_null(), "must have a method to call");

   315   assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");

   316   assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");

   317 

   318 

   319   CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)

   320 

   321 #if INCLUDE_JVMCI

   322   // Gets the nmethod (if any) that should be called instead of normal target

   323   nmethod* alternative_target = args->alternative_target();

   324   if (alternative_target == NULL) {

   325 #endif

   326 // Verify the arguments

   327 

   328   if (CheckJNICalls)  {

   329     args->verify(method, result->get_type());

   330   }

   331   else debug_only(args->verify(method, result->get_type()));

   332 #if INCLUDE_JVMCI

   333   }

   334 #else

   335 

   336   // Ignore call if method is empty

   337   if (method->is_empty_method()) {

   338     assert(result->get_type() == T_VOID, "an empty method must return a void value");

   339     return;

   340   }

   341 #endif

   342 

   343 #ifdef ASSERT

   344   { InstanceKlass* holder = method->method_holder();

   345     // A klass might not be initialized since JavaCall's might be used during the executing of

   346     // the <clinit>. For example, a Thread.start might start executing on an object that is

   347     // not fully initialized! (bad Java programming style)

   348     assert(holder->is_linked(), "rewriting must have taken place");

   349   }

   350 #endif

   351 

   352   CompilationPolicy::compile_if_required(method, CHECK);

   353 

   354   // Since the call stub sets up like the interpreter we call the from_interpreted_entry

   355   // so we can go compiled via a i2c. Otherwise initial entry method will always

   356   // run interpreted.

   357   address entry_point = method->from_interpreted_entry();

   358   if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {

   359     entry_point = method->interpreter_entry();

   360   }

   361 

   362   // Figure out if the result value is an oop or not (Note: This is a different value

   363   // than result_type. result_type will be T_INT of oops. (it is about size)

   364   BasicType result_type = runtime_type_from(result);

   365   bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY);

   366 

   367   // NOTE: if we move the computation of the result_val_address inside

   368   // the call to call_stub, the optimizer produces wrong code.

   369   intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());

   370 

   371   // Find receiver

   372   Handle receiver = (!method->is_static()) ? args->receiver() : Handle();

   373 

   374   // When we reenter Java, we need to reenable the reserved/yellow zone which

   375   // might already be disabled when we are in VM.

   376   if (!thread->stack_guards_enabled()) {

   377     thread->reguard_stack();

   378   }

   379 

   380   // Check that there are shadow pages available before changing thread state

   381   // to Java. Calculate current_stack_pointer here to make sure

   382   // stack_shadow_pages_available() and bang_stack_shadow_pages() use the same sp.

   383   address sp = os::current_stack_pointer();

   384   if (!os::stack_shadow_pages_available(THREAD, method, sp)) {

   385     // Throw stack overflow exception with preinitialized exception.

   386     Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);

   387     return;

   388   } else {

   389     // Touch pages checked if the OS needs them to be touched to be mapped.

   390     os::map_stack_shadow_pages(sp);

   391   }

   392 

   393 #if INCLUDE_JVMCI

   394   if (alternative_target != NULL) {

   395     if (alternative_target->is_alive()) {

   396       thread->set_jvmci_alternate_call_target(alternative_target->verified_entry_point());

   397       entry_point = method->adapter()->get_i2c_entry();

   398     } else {

   399       THROW(vmSymbols::jdk_vm_ci_code_InvalidInstalledCodeException());

   400     }

   401   }

   402 #endif

   403 

   404   // do call

   405   { JavaCallWrapper link(method, receiver, result, CHECK);

   406     { HandleMark hm(thread);  // HandleMark used by HandleMarkCleaner

   407 

   408       StubRoutines::call_stub()(

   409         (address)&link,

   410         // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)

   411         result_val_address,          // see NOTE above (compiler problem)

   412         result_type,

   413         method(),

   414         entry_point,

   415         args->parameters(),

   416         args->size_of_parameters(),

   417         CHECK

   418       );

   419 

   420       result = link.result();  // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)

   421       // Preserve oop return value across possible gc points

   422       if (oop_result_flag) {

   423         thread->set_vm_result((oop) result->get_jobject());

   424       }

   425     }

   426   } // Exit JavaCallWrapper (can block - potential return oop must be preserved)

   427 

   428   // Check if a thread stop or suspend should be executed

   429   // The following assert was not realistic.  Thread.stop can set that bit at any moment.

   430   //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");

   431 

   432   // Restore possible oop return

   433   if (oop_result_flag) {

   434     result->set_jobject((jobject)thread->vm_result());

   435     thread->set_vm_result(NULL);

   436   }

   437 }

   438 

   439 

   440 //--------------------------------------------------------------------------------------

   441 // Implementation of JavaCallArguments

   442 

   443 inline bool is_value_state_indirect_oop(uint state) {

   444   assert(state != JavaCallArguments::value_state_oop,

   445          "Checking for handles after removal");

   446   assert(state < JavaCallArguments::value_state_limit,

   447          "Invalid value state %u", state);

   448   return state != JavaCallArguments::value_state_primitive;

   449 }

   450 

   451 inline oop resolve_indirect_oop(intptr_t value, uint state) {

   452   switch (state) {

   453   case JavaCallArguments::value_state_handle:

   454   {

   455     oop* ptr = reinterpret_cast<oop*>(value);

   456     return Handle::raw_resolve(ptr);

   457   }

   458 

   459   case JavaCallArguments::value_state_jobject:

   460   {

   461     jobject obj = reinterpret_cast<jobject>(value);

   462     return JNIHandles::resolve(obj);

   463   }

   464 

   465   default:

   466     ShouldNotReachHere();

   467     return NULL;

   468   }

   469 }

   470 

   471 intptr_t* JavaCallArguments::parameters() {

   472   // First convert all handles to oops

   473   for(int i = 0; i < _size; i++) {

   474     uint state = _value_state[i];

   475     assert(state != value_state_oop, "Multiple handle conversions");

   476     if (is_value_state_indirect_oop(state)) {

   477       oop obj = resolve_indirect_oop(_value[i], state);

   478       _value[i] = cast_from_oop<intptr_t>(obj);

   479       _value_state[i] = value_state_oop;

   480     }

   481   }

   482   // Return argument vector

   483   return _value;

   484 }

   485 

   486 

   487 class SignatureChekker : public SignatureIterator {

   488  private:

   489    int _pos;

   490    BasicType _return_type;

   491    u_char* _value_state;

   492    intptr_t* _value;

   493 

   494  public:

   495   bool _is_return;

   496 

   497   SignatureChekker(Symbol* signature,

   498                    BasicType return_type,

   499                    bool is_static,

   500                    u_char* value_state,

   501                    intptr_t* value) :

   502     SignatureIterator(signature),

   503     _pos(0),

   504     _return_type(return_type),

   505     _value_state(value_state),

   506     _value(value),

   507     _is_return(false)

   508   {

   509     if (!is_static) {

   510       check_value(true); // Receiver must be an oop

   511     }

   512   }

   513 

   514   void check_value(bool type) {

   515     uint state = _value_state[_pos++];

   516     if (type) {

   517       guarantee(is_value_state_indirect_oop(state),

   518                 "signature does not match pushed arguments: %u at %d",

   519                 state, _pos - 1);

   520     } else {

   521       guarantee(state == JavaCallArguments::value_state_primitive,

   522                 "signature does not match pushed arguments: %u at %d",

   523                 state, _pos - 1);

   524     }

   525   }

   526 

   527   void check_doing_return(bool state) { _is_return = state; }

   528 

   529   void check_return_type(BasicType t) {

   530     guarantee(_is_return && t == _return_type, "return type does not match");

   531   }

   532 

   533   void check_int(BasicType t) {

   534     if (_is_return) {

   535       check_return_type(t);

   536       return;

   537     }

   538     check_value(false);

   539   }

   540 

   541   void check_double(BasicType t) { check_long(t); }

   542 

   543   void check_long(BasicType t) {

   544     if (_is_return) {

   545       check_return_type(t);

   546       return;

   547     }

   548 

   549     check_value(false);

   550     check_value(false);

   551   }

   552 

   553   void check_obj(BasicType t) {

   554     if (_is_return) {

   555       check_return_type(t);

   556       return;

   557     }

   558 

   559     intptr_t v = _value[_pos];

   560     if (v != 0) {

   561       // v is a "handle" referring to an oop, cast to integral type.

   562       // There shouldn't be any handles in very low memory.

   563       guarantee((size_t)v >= (size_t)os::vm_page_size(),

   564                 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);

   565       // Verify the pointee.

   566       oop vv = resolve_indirect_oop(v, _value_state[_pos]);

   567       guarantee(oopDesc::is_oop_or_null(vv, true),

   568                 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,

   569                 _pos, v, p2i(vv));

   570     }

   571 

   572     check_value(true);          // Verify value state.

   573   }

   574 

   575   void do_bool()                       { check_int(T_BOOLEAN);       }

   576   void do_char()                       { check_int(T_CHAR);          }

   577   void do_float()                      { check_int(T_FLOAT);         }

   578   void do_double()                     { check_double(T_DOUBLE);     }

   579   void do_byte()                       { check_int(T_BYTE);          }

   580   void do_short()                      { check_int(T_SHORT);         }

   581   void do_int()                        { check_int(T_INT);           }

   582   void do_long()                       { check_long(T_LONG);         }

   583   void do_void()                       { check_return_type(T_VOID);  }

   584   void do_object(int begin, int end)   { check_obj(T_OBJECT);        }

   585   void do_array(int begin, int end)    { check_obj(T_OBJECT);        }

   586 };

   587 

   588 

   589 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {

   590   guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");

   591 

   592   // Treat T_OBJECT and T_ARRAY as the same

   593   if (return_type == T_ARRAY) return_type = T_OBJECT;

   594 

   595   // Check that oop information is correct

   596   Symbol* signature = method->signature();

   597 

   598   SignatureChekker sc(signature,

   599                       return_type,

   600                       method->is_static(),

   601                       _value_state,

   602                       _value);

   603   sc.iterate_parameters();

   604   sc.check_doing_return(true);

   605   sc.iterate_returntype();

   606 }