1 /*
   2  * Copyright (c) 1997, 2018, 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.hpp"
  33 #include "oops/method.inline.hpp"
  34 #include "oops/oop.inline.hpp"
  35 #include "prims/jniCheck.hpp"
  36 #include "runtime/compilationPolicy.hpp"
  37 #include "runtime/handles.inline.hpp"
  38 #include "runtime/interfaceSupport.inline.hpp"
  39 #include "runtime/javaCalls.hpp"
  40 #include "runtime/jniHandles.inline.hpp"
  41 #include "runtime/mutexLocker.hpp"
  42 #include "runtime/os.inline.hpp"
  43 #include "runtime/signature.hpp"
  44 #include "runtime/stubRoutines.hpp"
  45 #include "runtime/thread.inline.hpp"
  46 #if INCLUDE_JVMCI
  47 #include "jvmci/jvmciJavaClasses.hpp"
  48 #include "jvmci/jvmciRuntime.hpp"
  49 #endif
  50 
  51 // -----------------------------------------------------
  52 // Implementation of JavaCallWrapper
  53 
  54 JavaCallWrapper::JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS) {
  55   JavaThread* thread = (JavaThread *)THREAD;
  56   bool clear_pending_exception = true;
  57 
  58   guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
  59   assert(!thread->owns_locks(), "must release all locks when leaving VM");
  60   guarantee(thread->can_call_java(), "cannot make java calls from the native compiler");
  61   _result   = result;
  62 
  63   // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
  64   // since it can potentially block.
  65   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
  66 
  67   // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
  68   // info, since we cannot find oops before the new information is set up completely.
  69   ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);
  70 
  71   // Make sure that we handle asynchronous stops and suspends _before_ we clear all thread state
  72   // in JavaCallWrapper::JavaCallWrapper(). This way, we can decide if we need to do any pd actions
  73   // to prepare for stop/suspend (flush register windows on sparcs, cache sp, or other state).
  74   if (thread->has_special_runtime_exit_condition()) {
  75     thread->handle_special_runtime_exit_condition();
  76     if (HAS_PENDING_EXCEPTION) {
  77       clear_pending_exception = false;
  78     }
  79   }
  80 
  81 
  82   // Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing
  83   // the JavaCallWrapper before the entry frame is on the stack.
  84   _callee_method = callee_method();
  85   _receiver = receiver();
  86 
  87 #ifdef CHECK_UNHANDLED_OOPS
  88   THREAD->allow_unhandled_oop(&_receiver);
  89 #endif // CHECK_UNHANDLED_OOPS
  90 
  91   _thread       = (JavaThread *)thread;
  92   _handles      = _thread->active_handles();    // save previous handle block & Java frame linkage
  93 
  94   // For the profiler, the last_Java_frame information in thread must always be in
  95   // legal state. We have no last Java frame if last_Java_sp == NULL so
  96   // the valid transition is to clear _last_Java_sp and then reset the rest of
  97   // the (platform specific) state.
  98 
  99   _anchor.copy(_thread->frame_anchor());
 100   _thread->frame_anchor()->clear();
 101 
 102   debug_only(_thread->inc_java_call_counter());
 103   _thread->set_active_handles(new_handles);     // install new handle block and reset Java frame linkage
 104 
 105   assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL");
 106 
 107   // clear any pending exception in thread (native calls start with no exception pending)
 108   if(clear_pending_exception) {
 109     _thread->clear_pending_exception();
 110   }
 111 
 112   if (_anchor.last_Java_sp() == NULL) {
 113     _thread->record_base_of_stack_pointer();
 114   }
 115 }
 116 
 117 
 118 JavaCallWrapper::~JavaCallWrapper() {
 119   assert(_thread == JavaThread::current(), "must still be the same thread");
 120 
 121   // restore previous handle block & Java frame linkage
 122   JNIHandleBlock *_old_handles = _thread->active_handles();
 123   _thread->set_active_handles(_handles);
 124 
 125   _thread->frame_anchor()->zap();
 126 
 127   debug_only(_thread->dec_java_call_counter());
 128 
 129   if (_anchor.last_Java_sp() == NULL) {
 130     _thread->set_base_of_stack_pointer(NULL);
 131   }
 132 
 133 
 134   // Old thread-local info. has been restored. We are not back in the VM.
 135   ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);
 136 
 137   // State has been restored now make the anchor frame visible for the profiler.
 138   // Do this after the transition because this allows us to put an assert
 139   // the Java->vm transition which checks to see that stack is not walkable
 140   // on sparc/ia64 which will catch violations of the reseting of last_Java_frame
 141   // invariants (i.e. _flags always cleared on return to Java)
 142 
 143   _thread->frame_anchor()->copy(&_anchor);
 144 
 145   // Release handles after we are marked as being inside the VM again, since this
 146   // operation might block
 147   JNIHandleBlock::release_block(_old_handles, _thread);
 148 }
 149 
 150 
 151 void JavaCallWrapper::oops_do(OopClosure* f) {
 152   f->do_oop((oop*)&_receiver);
 153   handles()->oops_do(f);
 154 }
 155 
 156 
 157 // Helper methods
 158 static BasicType runtime_type_from(JavaValue* result) {
 159   switch (result->get_type()) {
 160     case T_BOOLEAN: // fall through
 161     case T_CHAR   : // fall through
 162     case T_SHORT  : // fall through
 163     case T_INT    : // fall through
 164 #ifndef _LP64
 165     case T_OBJECT : // fall through
 166     case T_ARRAY  : // fall through
 167 #endif
 168     case T_BYTE   : // fall through
 169     case T_VOID   : return T_INT;
 170     case T_LONG   : return T_LONG;
 171     case T_FLOAT  : return T_FLOAT;
 172     case T_DOUBLE : return T_DOUBLE;
 173 #ifdef _LP64
 174     case T_ARRAY  : // fall through
 175     case T_OBJECT:  return T_OBJECT;
 176 #endif
 177     default:
 178       ShouldNotReachHere();
 179       return T_ILLEGAL;
 180   }
 181 }
 182 
 183 // ============ Virtual calls ============
 184 
 185 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 186   CallInfo callinfo;
 187   Handle receiver = args->receiver();
 188   Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();
 189   LinkInfo link_info(spec_klass, name, signature);
 190   LinkResolver::resolve_virtual_call(
 191           callinfo, receiver, recvrKlass, link_info, true, CHECK);
 192   methodHandle method = callinfo.selected_method();
 193   assert(method.not_null(), "should have thrown exception");
 194 
 195   // Invoke the method
 196   JavaCalls::call(result, method, args, CHECK);
 197 }
 198 
 199 
 200 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {
 201   JavaCallArguments args(receiver); // One oop argument
 202   call_virtual(result, spec_klass, name, signature, &args, CHECK);
 203 }
 204 
 205 
 206 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
 207   JavaCallArguments args(receiver); // One oop argument
 208   args.push_oop(arg1);
 209   call_virtual(result, spec_klass, name, signature, &args, CHECK);
 210 }
 211 
 212 
 213 
 214 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
 215   JavaCallArguments args(receiver); // One oop argument
 216   args.push_oop(arg1);
 217   args.push_oop(arg2);
 218   call_virtual(result, spec_klass, name, signature, &args, CHECK);
 219 }
 220 
 221 
 222 // ============ Special calls ============
 223 
 224 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 225   CallInfo callinfo;
 226   LinkInfo link_info(klass, name, signature);
 227   LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);
 228   methodHandle method = callinfo.selected_method();
 229   assert(method.not_null(), "should have thrown exception");
 230 
 231   // Invoke the method
 232   JavaCalls::call(result, method, args, CHECK);
 233 }
 234 
 235 
 236 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
 237   JavaCallArguments args(receiver); // One oop argument
 238   call_special(result, klass, name, signature, &args, CHECK);
 239 }
 240 
 241 
 242 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
 243   JavaCallArguments args(receiver); // One oop argument
 244   args.push_oop(arg1);
 245   call_special(result, klass, name, signature, &args, CHECK);
 246 }
 247 
 248 
 249 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
 250   JavaCallArguments args(receiver); // One oop argument
 251   args.push_oop(arg1);
 252   args.push_oop(arg2);
 253   call_special(result, klass, name, signature, &args, CHECK);
 254 }
 255 
 256 
 257 // ============ Static calls ============
 258 
 259 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 260   CallInfo callinfo;
 261   LinkInfo link_info(klass, name, signature);
 262   LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);
 263   methodHandle method = callinfo.selected_method();
 264   assert(method.not_null(), "should have thrown exception");
 265 
 266   // Invoke the method
 267   JavaCalls::call(result, method, args, CHECK);
 268 }
 269 
 270 
 271 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
 272   JavaCallArguments args; // No argument
 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, TRAPS) {
 278   JavaCallArguments args(arg1); // One oop argument
 279   call_static(result, klass, name, signature, &args, CHECK);
 280 }
 281 
 282 
 283 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
 284   JavaCallArguments args; // One oop argument
 285   args.push_oop(arg1);
 286   args.push_oop(arg2);
 287   call_static(result, klass, name, signature, &args, CHECK);
 288 }
 289 
 290 
 291 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) {
 292   JavaCallArguments args; // One oop argument
 293   args.push_oop(arg1);
 294   args.push_oop(arg2);
 295   args.push_oop(arg3);
 296   call_static(result, klass, name, signature, &args, CHECK);
 297 }
 298 
 299 // -------------------------------------------------
 300 // Implementation of JavaCalls (low level)
 301 
 302 
 303 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
 304   // Check if we need to wrap a potential OS exception handler around thread
 305   // This is used for e.g. Win32 structured exception handlers
 306   assert(THREAD->is_Java_thread(), "only JavaThreads can make JavaCalls");
 307   // Need to wrap each and every time, since there might be native code down the
 308   // stack that has installed its own exception handlers
 309   os::os_exception_wrapper(call_helper, result, method, args, THREAD);
 310 }
 311 
 312 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
 313 
 314   JavaThread* thread = (JavaThread*)THREAD;
 315   assert(thread->is_Java_thread(), "must be called by a java thread");
 316   assert(method.not_null(), "must have a method to call");
 317   assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");
 318   assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");
 319 
 320 
 321   CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
 322 
 323 #if INCLUDE_JVMCI
 324   // Gets the nmethod (if any) that should be called instead of normal target
 325   nmethod* alternative_target = args->alternative_target();
 326   if (alternative_target == NULL) {
 327 #endif
 328 // Verify the arguments
 329 
 330   if (CheckJNICalls)  {
 331     args->verify(method, result->get_type());
 332   }
 333   else debug_only(args->verify(method, result->get_type()));
 334 #if INCLUDE_JVMCI
 335   }
 336 #else
 337 
 338   // Ignore call if method is empty
 339   if (method->is_empty_method()) {
 340     assert(result->get_type() == T_VOID, "an empty method must return a void value");
 341     return;
 342   }
 343 #endif
 344 
 345 #ifdef ASSERT
 346   { InstanceKlass* holder = method->method_holder();
 347     // A klass might not be initialized since JavaCall's might be used during the executing of
 348     // the <clinit>. For example, a Thread.start might start executing on an object that is
 349     // not fully initialized! (bad Java programming style)
 350     assert(holder->is_linked(), "rewriting must have taken place");
 351   }
 352 #endif
 353 
 354   CompilationPolicy::compile_if_required(method, CHECK);
 355 
 356   // Since the call stub sets up like the interpreter we call the from_interpreted_entry
 357   // so we can go compiled via a i2c. Otherwise initial entry method will always
 358   // run interpreted.
 359   address entry_point = method->from_interpreted_entry();
 360   if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
 361     entry_point = method->interpreter_entry();
 362   }
 363 
 364   // Figure out if the result value is an oop or not (Note: This is a different value
 365   // than result_type. result_type will be T_INT of oops. (it is about size)
 366   BasicType result_type = runtime_type_from(result);
 367   bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY);
 368 
 369   // NOTE: if we move the computation of the result_val_address inside
 370   // the call to call_stub, the optimizer produces wrong code.
 371   intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
 372 
 373   // Find receiver
 374   Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
 375 
 376   // When we reenter Java, we need to reenable the reserved/yellow zone which
 377   // might already be disabled when we are in VM.
 378   if (!thread->stack_guards_enabled()) {
 379     thread->reguard_stack();
 380   }
 381 
 382   // Check that there are shadow pages available before changing thread state
 383   // to Java. Calculate current_stack_pointer here to make sure
 384   // stack_shadow_pages_available() and bang_stack_shadow_pages() use the same sp.
 385   address sp = os::current_stack_pointer();
 386   if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
 387     // Throw stack overflow exception with preinitialized exception.
 388     Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
 389     return;
 390   } else {
 391     // Touch pages checked if the OS needs them to be touched to be mapped.
 392     os::map_stack_shadow_pages(sp);
 393   }
 394 
 395 #if INCLUDE_JVMCI
 396   if (alternative_target != NULL) {
 397     if (alternative_target->is_alive()) {
 398       thread->set_jvmci_alternate_call_target(alternative_target->verified_entry_point());
 399       entry_point = method->adapter()->get_i2c_entry();
 400     } else {
 401       THROW(vmSymbols::jdk_vm_ci_code_InvalidInstalledCodeException());
 402     }
 403   }
 404 #endif
 405 
 406   // do call
 407   { JavaCallWrapper link(method, receiver, result, CHECK);
 408     { HandleMark hm(thread);  // HandleMark used by HandleMarkCleaner
 409 
 410       StubRoutines::call_stub()(
 411         (address)&link,
 412         // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
 413         result_val_address,          // see NOTE above (compiler problem)
 414         result_type,
 415         method(),
 416         entry_point,
 417         args->parameters(),
 418         args->size_of_parameters(),
 419         CHECK
 420       );
 421 
 422       result = link.result();  // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
 423       // Preserve oop return value across possible gc points
 424       if (oop_result_flag) {
 425         thread->set_vm_result((oop) result->get_jobject());
 426       }
 427     }
 428   } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
 429 
 430   // Check if a thread stop or suspend should be executed
 431   // The following assert was not realistic.  Thread.stop can set that bit at any moment.
 432   //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
 433 
 434   // Restore possible oop return
 435   if (oop_result_flag) {
 436     result->set_jobject((jobject)thread->vm_result());
 437     thread->set_vm_result(NULL);
 438   }
 439 }
 440 
 441 
 442 //--------------------------------------------------------------------------------------
 443 // Implementation of JavaCallArguments
 444 
 445 inline bool is_value_state_indirect_oop(uint state) {
 446   assert(state != JavaCallArguments::value_state_oop,
 447          "Checking for handles after removal");
 448   assert(state < JavaCallArguments::value_state_limit,
 449          "Invalid value state %u", state);
 450   return state != JavaCallArguments::value_state_primitive;
 451 }
 452 
 453 inline oop resolve_indirect_oop(intptr_t value, uint state) {
 454   switch (state) {
 455   case JavaCallArguments::value_state_handle:
 456   {
 457     oop* ptr = reinterpret_cast<oop*>(value);
 458     return Handle::raw_resolve(ptr);
 459   }
 460 
 461   case JavaCallArguments::value_state_jobject:
 462   {
 463     jobject obj = reinterpret_cast<jobject>(value);
 464     return JNIHandles::resolve(obj);
 465   }
 466 
 467   default:
 468     ShouldNotReachHere();
 469     return NULL;
 470   }
 471 }
 472 
 473 intptr_t* JavaCallArguments::parameters() {
 474   // First convert all handles to oops
 475   for(int i = 0; i < _size; i++) {
 476     uint state = _value_state[i];
 477     assert(state != value_state_oop, "Multiple handle conversions");
 478     if (is_value_state_indirect_oop(state)) {
 479       oop obj = resolve_indirect_oop(_value[i], state);
 480       _value[i] = cast_from_oop<intptr_t>(obj);
 481       _value_state[i] = value_state_oop;
 482     }
 483   }
 484   // Return argument vector
 485   return _value;
 486 }
 487 
 488 
 489 class SignatureChekker : public SignatureIterator {
 490  private:
 491    int _pos;
 492    BasicType _return_type;
 493    u_char* _value_state;
 494    intptr_t* _value;
 495 
 496  public:
 497   bool _is_return;
 498 
 499   SignatureChekker(Symbol* signature,
 500                    BasicType return_type,
 501                    bool is_static,
 502                    u_char* value_state,
 503                    intptr_t* value) :
 504     SignatureIterator(signature),
 505     _pos(0),
 506     _return_type(return_type),
 507     _value_state(value_state),
 508     _value(value),
 509     _is_return(false)
 510   {
 511     if (!is_static) {
 512       check_value(true); // Receiver must be an oop
 513     }
 514   }
 515 
 516   void check_value(bool type) {
 517     uint state = _value_state[_pos++];
 518     if (type) {
 519       guarantee(is_value_state_indirect_oop(state),
 520                 "signature does not match pushed arguments: %u at %d",
 521                 state, _pos - 1);
 522     } else {
 523       guarantee(state == JavaCallArguments::value_state_primitive,
 524                 "signature does not match pushed arguments: %u at %d",
 525                 state, _pos - 1);
 526     }
 527   }
 528 
 529   void check_doing_return(bool state) { _is_return = state; }
 530 
 531   void check_return_type(BasicType t) {
 532     guarantee(_is_return && t == _return_type, "return type does not match");
 533   }
 534 
 535   void check_int(BasicType t) {
 536     if (_is_return) {
 537       check_return_type(t);
 538       return;
 539     }
 540     check_value(false);
 541   }
 542 
 543   void check_double(BasicType t) { check_long(t); }
 544 
 545   void check_long(BasicType t) {
 546     if (_is_return) {
 547       check_return_type(t);
 548       return;
 549     }
 550 
 551     check_value(false);
 552     check_value(false);
 553   }
 554 
 555   void check_obj(BasicType t) {
 556     if (_is_return) {
 557       check_return_type(t);
 558       return;
 559     }
 560 
 561     intptr_t v = _value[_pos];
 562     if (v != 0) {
 563       // v is a "handle" referring to an oop, cast to integral type.
 564       // There shouldn't be any handles in very low memory.
 565       guarantee((size_t)v >= (size_t)os::vm_page_size(),
 566                 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);
 567       // Verify the pointee.
 568       oop vv = resolve_indirect_oop(v, _value_state[_pos]);
 569       guarantee(oopDesc::is_oop_or_null(vv, true),
 570                 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
 571                 _pos, v, p2i(vv));
 572     }
 573 
 574     check_value(true);          // Verify value state.
 575   }
 576 
 577   void do_bool()                       { check_int(T_BOOLEAN);       }
 578   void do_char()                       { check_int(T_CHAR);          }
 579   void do_float()                      { check_int(T_FLOAT);         }
 580   void do_double()                     { check_double(T_DOUBLE);     }
 581   void do_byte()                       { check_int(T_BYTE);          }
 582   void do_short()                      { check_int(T_SHORT);         }
 583   void do_int()                        { check_int(T_INT);           }
 584   void do_long()                       { check_long(T_LONG);         }
 585   void do_void()                       { check_return_type(T_VOID);  }
 586   void do_object(int begin, int end)   { check_obj(T_OBJECT);        }
 587   void do_array(int begin, int end)    { check_obj(T_OBJECT);        }
 588 };
 589 
 590 
 591 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
 592   guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
 593 
 594   // Treat T_OBJECT and T_ARRAY as the same
 595   if (return_type == T_ARRAY) return_type = T_OBJECT;
 596 
 597   // Check that oop information is correct
 598   Symbol* signature = method->signature();
 599 
 600   SignatureChekker sc(signature,
 601                       return_type,
 602                       method->is_static(),
 603                       _value_state,
 604                       _value);
 605   sc.iterate_parameters();
 606   sc.check_doing_return(true);
 607   sc.iterate_returntype();
 608 }
--- EOF ---