1 /*
  2  * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
  3  * Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
  4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  5  *
  6  * This code is free software; you can redistribute it and/or modify it
  7  * under the terms of the GNU General Public License version 2 only, as
  8  * published by the Free Software Foundation.
  9  *
 10  * This code is distributed in the hope that it will be useful, but WITHOUT
 11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 13  * version 2 for more details (a copy is included in the LICENSE file that
 14  * accompanied this code).
 15  *
 16  * You should have received a copy of the GNU General Public License version
 17  * 2 along with this work; if not, write to the Free Software Foundation,
 18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 19  *
 20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 21  * or visit www.oracle.com if you need additional information or have any
 22  * questions.
 23  *
 24  */
 25 
 26 #include "precompiled.hpp"
 27 #include "classfile/vmSymbols.hpp"
 28 #include "code/nmethod.hpp"
 29 #include "compiler/compilationPolicy.hpp"
 30 #include "compiler/compileBroker.hpp"
 31 #include "interpreter/interpreter.hpp"
 32 #include "interpreter/linkResolver.hpp"
 33 #include "memory/universe.hpp"
 34 #include "oops/method.inline.hpp"
 35 #include "oops/oop.inline.hpp"
 36 #include "oops/inlineKlass.hpp"
 37 #include "prims/jniCheck.hpp"
 38 #include "prims/jvmtiExport.hpp"
 39 #include "runtime/handles.inline.hpp"
 40 #include "runtime/interfaceSupport.inline.hpp"
 41 #include "runtime/javaCalls.hpp"
 42 #include "runtime/javaThread.hpp"
 43 #include "runtime/jniHandles.inline.hpp"
 44 #include "runtime/mutexLocker.hpp"
 45 #include "runtime/os.inline.hpp"
 46 #include "runtime/sharedRuntime.hpp"
 47 #include "runtime/signature.hpp"
 48 #include "runtime/stubRoutines.hpp"
 49 #include "runtime/thread.inline.hpp"
 50 #if INCLUDE_JVMCI
 51 #include "jvmci/jvmciJavaClasses.hpp"
 52 #endif
 53 
 54 // -----------------------------------------------------
 55 // Implementation of JavaCallWrapper
 56 
 57 JavaCallWrapper::JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS) {
 58   JavaThread* thread = THREAD;
 59 
 60   guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
 61   assert(!thread->owns_locks(), "must release all locks when leaving VM");
 62   guarantee(thread->can_call_java(), "cannot make java calls from the native compiler");
 63   _result   = result;
 64 
 65   // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
 66   // since it can potentially block.
 67   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 68 
 69   // clear any pending exception in thread (native calls start with no exception pending)
 70   thread->clear_pending_exception();
 71 
 72   // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
 73   // info, since we cannot find oops before the new information is set up completely.
 74   ThreadStateTransition::transition_from_vm(thread, _thread_in_Java, true /* check_asyncs */);
 75 
 76   // Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing
 77   // the JavaCallWrapper before the entry frame is on the stack.
 78   _callee_method = callee_method();
 79   _receiver = receiver();
 80 
 81 #ifdef CHECK_UNHANDLED_OOPS
 82   THREAD->allow_unhandled_oop(&_receiver);
 83 #endif // CHECK_UNHANDLED_OOPS
 84 
 85   _thread       = thread;
 86   _handles      = _thread->active_handles();    // save previous handle block & Java frame linkage
 87 
 88   // For the profiler, the last_Java_frame information in thread must always be in
 89   // legal state. We have no last Java frame if last_Java_sp == nullptr so
 90   // the valid transition is to clear _last_Java_sp and then reset the rest of
 91   // the (platform specific) state.
 92 
 93   _anchor.copy(_thread->frame_anchor());
 94   _thread->frame_anchor()->clear();
 95 
 96   debug_only(_thread->inc_java_call_counter());
 97   _thread->set_active_handles(new_handles);     // install new handle block and reset Java frame linkage
 98 
 99   MACOS_AARCH64_ONLY(_thread->enable_wx(WXExec));
100 }
101 
102 
103 JavaCallWrapper::~JavaCallWrapper() {
104   assert(_thread == JavaThread::current(), "must still be the same thread");
105 
106   MACOS_AARCH64_ONLY(_thread->enable_wx(WXWrite));
107 
108   // restore previous handle block & Java frame linkage
109   JNIHandleBlock *_old_handles = _thread->active_handles();
110   _thread->set_active_handles(_handles);
111 
112   _thread->frame_anchor()->zap();
113 
114   debug_only(_thread->dec_java_call_counter());
115 
116   // Old thread-local info. has been restored. We are not back in the VM.
117   ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);
118 
119   // State has been restored now make the anchor frame visible for the profiler.
120   _thread->frame_anchor()->copy(&_anchor);
121 
122   // Release handles after we are marked as being inside the VM again, since this
123   // operation might block
124   JNIHandleBlock::release_block(_old_handles, _thread);
125 
126   if (_thread->has_pending_exception() && _thread->has_last_Java_frame()) {
127     // If we get here, the Java code threw an exception that unwound a frame.
128     // It could be that the new frame anchor has not passed through the required
129     // StackWatermark barriers. Therefore, we process any such deferred unwind
130     // requests here.
131     StackWatermarkSet::after_unwind(_thread);
132   }
133 }
134 
135 
136 void JavaCallWrapper::oops_do(OopClosure* f) {
137   f->do_oop((oop*)&_receiver);
138   handles()->oops_do(f);
139 }
140 
141 
142 // Helper methods
143 static BasicType runtime_type_from(JavaValue* result) {
144   switch (result->get_type()) {
145     case T_BOOLEAN  : // fall through
146     case T_CHAR     : // fall through
147     case T_SHORT    : // fall through
148     case T_INT      : // fall through
149 #ifndef _LP64
150     case T_OBJECT   : // fall through
151     case T_ARRAY    : // fall through
152     case T_FLAT_ELEMENT: // fall through
153 #endif
154     case T_BYTE     : // fall through
155     case T_VOID     : return T_INT;
156     case T_LONG     : return T_LONG;
157     case T_FLOAT    : return T_FLOAT;
158     case T_DOUBLE   : return T_DOUBLE;
159 #ifdef _LP64
160     case T_ARRAY    : // fall through
161     case T_OBJECT   : return T_OBJECT;
162 #endif
163     default:
164       ShouldNotReachHere();
165       return T_ILLEGAL;
166   }
167 }
168 
169 // ============ Virtual calls ============
170 
171 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
172   CallInfo callinfo;
173   Handle receiver = args->receiver();
174   Klass* recvrKlass = receiver.is_null() ? (Klass*)nullptr : receiver->klass();
175   LinkInfo link_info(spec_klass, name, signature);
176   LinkResolver::resolve_virtual_call(
177           callinfo, receiver, recvrKlass, link_info, true, CHECK);
178   methodHandle method(THREAD, callinfo.selected_method());
179   assert(method.not_null(), "should have thrown exception");
180 
181   // Invoke the method
182   JavaCalls::call(result, method, args, CHECK);
183 }
184 
185 
186 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {
187   JavaCallArguments args(receiver);
188   call_virtual(result, spec_klass, name, signature, &args, CHECK);
189 }
190 
191 
192 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
193   JavaCallArguments args(receiver);
194   args.push_oop(arg1);
195   call_virtual(result, spec_klass, name, signature, &args, CHECK);
196 }
197 
198 
199 
200 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
201   JavaCallArguments args(receiver);
202   args.push_oop(arg1);
203   args.push_oop(arg2);
204   call_virtual(result, spec_klass, name, signature, &args, CHECK);
205 }
206 
207 
208 // ============ Special calls ============
209 
210 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
211   CallInfo callinfo;
212   LinkInfo link_info(klass, name, signature);
213   LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);
214   methodHandle method(THREAD, callinfo.selected_method());
215   assert(method.not_null(), "should have thrown exception");
216 
217   // Invoke the method
218   JavaCalls::call(result, method, args, CHECK);
219 }
220 
221 
222 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
223   JavaCallArguments args(receiver);
224   call_special(result, klass, name, signature, &args, CHECK);
225 }
226 
227 
228 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
229   JavaCallArguments args(receiver);
230   args.push_oop(arg1);
231   call_special(result, klass, name, signature, &args, CHECK);
232 }
233 
234 
235 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
236   JavaCallArguments args(receiver);
237   args.push_oop(arg1);
238   args.push_oop(arg2);
239   call_special(result, klass, name, signature, &args, CHECK);
240 }
241 
242 
243 // ============ Static calls ============
244 
245 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
246   CallInfo callinfo;
247   LinkInfo link_info(klass, name, signature);
248   LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);
249   methodHandle method(THREAD, callinfo.selected_method());
250   assert(method.not_null(), "should have thrown exception");
251 
252   // Invoke the method
253   JavaCalls::call(result, method, args, CHECK);
254 }
255 
256 
257 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
258   JavaCallArguments args;
259   call_static(result, klass, name, signature, &args, CHECK);
260 }
261 
262 
263 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
264   JavaCallArguments args(arg1);
265   call_static(result, klass, name, signature, &args, CHECK);
266 }
267 
268 
269 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
270   JavaCallArguments args;
271   args.push_oop(arg1);
272   args.push_oop(arg2);
273   call_static(result, klass, name, signature, &args, CHECK);
274 }
275 
276 
277 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) {
278   JavaCallArguments args;
279   args.push_oop(arg1);
280   args.push_oop(arg2);
281   args.push_oop(arg3);
282   call_static(result, klass, name, signature, &args, CHECK);
283 }
284 
285 // ============ allocate and initialize new object instance ============
286 
287 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, JavaCallArguments* args, TRAPS) {
288   klass->initialize(CHECK_NH); // Quick no-op if already initialized.
289   Handle obj = klass->allocate_instance_handle(CHECK_NH);
290   JavaValue void_result(T_VOID);
291   args->set_receiver(obj); // inserts <obj> as the first argument.
292   JavaCalls::call_special(&void_result, klass,
293                           vmSymbols::object_initializer_name(),
294                           constructor_signature, args, CHECK_NH);
295   // Already returned a Null Handle if any exception is pending.
296   return obj;
297 }
298 
299 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, TRAPS) {
300   JavaCallArguments args;
301   return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
302 }
303 
304 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, TRAPS) {
305   JavaCallArguments args;
306   args.push_oop(arg1);
307   return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
308 }
309 
310 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, Handle arg2, TRAPS) {
311   JavaCallArguments args;
312   args.push_oop(arg1);
313   args.push_oop(arg2);
314   return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
315 }
316 
317 // -------------------------------------------------
318 // Implementation of JavaCalls (low level)
319 
320 
321 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
322   // Check if we need to wrap a potential OS exception handler around thread.
323   // This is used for e.g. Win32 structured exception handlers.
324   // Need to wrap each and every time, since there might be native code down the
325   // stack that has installed its own exception handlers.
326   os::os_exception_wrapper(call_helper, result, method, args, THREAD);
327 }
328 
329 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
330 
331   JavaThread* thread = THREAD;
332   assert(method.not_null(), "must have a method to call");
333   assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");
334   assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");
335 
336   // Verify the arguments
337   if (JVMCI_ONLY(args->alternative_target().is_null() &&) (DEBUG_ONLY(true ||) CheckJNICalls)) {
338     args->verify(method, result->get_type());
339   }
340   // Ignore call if method is empty
341   if (JVMCI_ONLY(args->alternative_target().is_null() &&) method->is_empty_method()) {
342     assert(result->get_type() == T_VOID, "an empty method must return a void value");
343     return;
344   }
345 
346 #ifdef ASSERT
347   { InstanceKlass* holder = method->method_holder();
348     // A klass might not be initialized since JavaCall's might be used during the executing of
349     // the <clinit>. For example, a Thread.start might start executing on an object that is
350     // not fully initialized! (bad Java programming style)
351     assert(holder->is_linked(), "rewriting must have taken place");
352   }
353 #endif
354 
355   CompilationPolicy::compile_if_required(method, CHECK);
356 
357   // Figure out if the result value is an oop or not (Note: This is a different value
358   // than result_type. result_type will be T_INT of oops. (it is about size)
359   BasicType result_type = runtime_type_from(result);
360   bool oop_result_flag = is_reference_type(result->get_type());
361 
362   // Find receiver
363   Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
364 
365   // When we reenter Java, we need to re-enable the reserved/yellow zone which
366   // might already be disabled when we are in VM.
367   thread->stack_overflow_state()->reguard_stack_if_needed();
368 
369   // Check that there are shadow pages available before changing thread state
370   // to Java. Calculate current_stack_pointer here to make sure
371   // stack_shadow_pages_available() and map_stack_shadow_pages() use the same sp.
372   address sp = os::current_stack_pointer();
373   if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
374     // Throw stack overflow exception with preinitialized exception.
375     Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
376     return;
377   } else {
378     // Touch pages checked if the OS needs them to be touched to be mapped.
379     os::map_stack_shadow_pages(sp);
380   }
381 
382   jobject value_buffer = nullptr;
383   if (InlineTypeReturnedAsFields && (result->get_type() == T_OBJECT)) {
384     // Pre allocate a buffered inline type in case the result is returned
385     // flattened by compiled code
386     InlineKlass* vk = method->returns_inline_type(thread);
387     if (vk != nullptr && vk->can_be_returned_as_fields()) {
388       oop instance = vk->allocate_instance(CHECK);
389       value_buffer = JNIHandles::make_local(thread, instance);
390       result->set_jobject(value_buffer);
391     }
392   }
393 
394   // do call
395   { JavaCallWrapper link(method, receiver, result, CHECK);
396     { HandleMark hm(thread);  // HandleMark used by HandleMarkCleaner
397 
398       // NOTE: if we move the computation of the result_val_address inside
399       // the call to call_stub, the optimizer produces wrong code.
400       intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
401       intptr_t* parameter_address = args->parameters();
402 
403       address entry_point;
404       {
405         // The enter_interp_only_mode use handshake to set interp_only mode
406         // so no safepoint should be allowed between is_interp_only_mode() and call
407         NoSafepointVerifier nsv;
408         if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
409           entry_point = method->interpreter_entry();
410         } else {
411           // Since the call stub sets up like the interpreter we call the from_interpreted_entry
412           // so we can go compiled via a i2c.
413           entry_point = method->from_interpreted_entry();
414 #if INCLUDE_JVMCI
415           // Gets the alternative target (if any) that should be called
416           Handle alternative_target = args->alternative_target();
417           if (!alternative_target.is_null()) {
418             // Must extract verified entry point from HotSpotNmethod after VM to Java
419             // transition in JavaCallWrapper constructor so that it is safe with
420             // respect to nmethod sweeping.
421             address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(nullptr, alternative_target());
422             if (verified_entry_point != nullptr) {
423               thread->set_jvmci_alternate_call_target(verified_entry_point);
424               entry_point = method->adapter()->get_i2c_entry();
425             }
426           }
427 #endif
428         }
429       }
430       StubRoutines::call_stub()(
431         (address)&link,
432         // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
433         result_val_address,          // see NOTE above (compiler problem)
434         result_type,
435         method(),
436         entry_point,
437         parameter_address,
438         args->size_of_parameters(),
439         CHECK
440       );
441 
442       result = link.result();  // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
443       // Preserve oop return value across possible gc points
444       if (oop_result_flag) {
445         thread->set_vm_result(result->get_oop());
446       }
447     }
448   } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
449 
450   // Check if a thread stop or suspend should be executed
451   // The following assert was not realistic.  Thread.stop can set that bit at any moment.
452   //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
453 
454   // Restore possible oop return
455   if (oop_result_flag) {
456     result->set_oop(thread->vm_result());
457     thread->set_vm_result(nullptr);
458     JNIHandles::destroy_local(value_buffer);
459   }
460 }
461 
462 
463 //--------------------------------------------------------------------------------------
464 // Implementation of JavaCallArguments
465 
466 inline bool is_value_state_indirect_oop(uint state) {
467   assert(state != JavaCallArguments::value_state_oop,
468          "Checking for handles after removal");
469   assert(state < JavaCallArguments::value_state_limit,
470          "Invalid value state %u", state);
471   return state != JavaCallArguments::value_state_primitive;
472 }
473 
474 inline oop resolve_indirect_oop(intptr_t value, uint state) {
475   switch (state) {
476   case JavaCallArguments::value_state_handle:
477   {
478     oop* ptr = reinterpret_cast<oop*>(value);
479     return Handle::raw_resolve(ptr);
480   }
481 
482   case JavaCallArguments::value_state_jobject:
483   {
484     jobject obj = reinterpret_cast<jobject>(value);
485     return JNIHandles::resolve(obj);
486   }
487 
488   default:
489     ShouldNotReachHere();
490     return nullptr;
491   }
492 }
493 
494 intptr_t* JavaCallArguments::parameters() {
495   // First convert all handles to oops
496   for(int i = 0; i < _size; i++) {
497     uint state = _value_state[i];
498     assert(state != value_state_oop, "Multiple handle conversions");
499     if (is_value_state_indirect_oop(state)) {
500       oop obj = resolve_indirect_oop(_value[i], state);
501       _value[i] = cast_from_oop<intptr_t>(obj);
502       _value_state[i] = value_state_oop;
503     }
504   }
505   // Return argument vector
506   return _value;
507 }
508 
509 
510 class SignatureChekker : public SignatureIterator {
511  private:
512    int _pos;
513    BasicType _return_type;
514    u_char* _value_state;
515    intptr_t* _value;
516 
517  public:
518   SignatureChekker(Symbol* signature,
519                    BasicType return_type,
520                    bool is_static,
521                    u_char* value_state,
522                    intptr_t* value) :
523     SignatureIterator(signature),
524     _pos(0),
525     _return_type(return_type),
526     _value_state(value_state),
527     _value(value)
528   {
529     if (!is_static) {
530       check_value(true); // Receiver must be an oop
531     }
532     do_parameters_on(this);
533     check_return_type(return_type);
534   }
535 
536  private:
537   void check_value(bool is_reference) {
538     uint state = _value_state[_pos++];
539     if (is_reference) {
540       guarantee(is_value_state_indirect_oop(state),
541                 "signature does not match pushed arguments: %u at %d",
542                 state, _pos - 1);
543     } else {
544       guarantee(state == JavaCallArguments::value_state_primitive,
545                 "signature does not match pushed arguments: %u at %d",
546                 state, _pos - 1);
547     }
548   }
549 
550   void check_return_type(BasicType t) {
551     guarantee(t == _return_type, "return type does not match");
552   }
553 
554   void check_single_word() {
555     check_value(false);
556   }
557 
558   void check_double_word() {
559     check_value(false);
560     check_value(false);
561   }
562 
563   void check_reference() {
564     intptr_t v = _value[_pos];
565     if (v != 0) {
566       // v is a "handle" referring to an oop, cast to integral type.
567       // There shouldn't be any handles in very low memory.
568       guarantee((size_t)v >= os::vm_page_size(),
569                 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);
570       // Verify the pointee.
571       oop vv = resolve_indirect_oop(v, _value_state[_pos]);
572       guarantee(oopDesc::is_oop_or_null(vv, true),
573                 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
574                 _pos, v, p2i(vv));
575     }
576 
577     check_value(true);          // Verify value state.
578   }
579 
580   friend class SignatureIterator;  // so do_parameters_on can call do_type
581   void do_type(BasicType type) {
582     switch (type) {
583     case T_BYTE:
584     case T_BOOLEAN:
585     case T_CHAR:
586     case T_SHORT:
587     case T_INT:
588     case T_FLOAT:  // this one also
589       check_single_word(); break;
590     case T_LONG:
591     case T_DOUBLE:
592       check_double_word(); break;
593     case T_ARRAY:
594     case T_OBJECT:
595       check_reference(); break;
596     default:
597       ShouldNotReachHere();
598     }
599   }
600 };
601 
602 
603 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
604   guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
605 
606   // Treat T_OBJECT and T_ARRAY as the same
607   if (return_type == T_ARRAY) return_type = T_OBJECT;
608 
609   // Check that oop information is correct
610   Symbol* signature = method->signature();
611 
612   SignatureChekker sc(signature,
613                       return_type,
614                       method->is_static(),
615                       _value_state,
616                       _value);
617 }