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 "oops/valueKlass.hpp"
  35 #include "prims/jniCheck.hpp"
  36 #include "runtime/compilationPolicy.hpp"
  37 #include "runtime/handles.inline.hpp"
  38 #include "runtime/interfaceSupport.hpp"
  39 #include "runtime/javaCalls.hpp"
  40 #include "runtime/mutexLocker.hpp"
  41 #include "runtime/os.inline.hpp"
  42 #include "runtime/signature.hpp"
  43 #include "runtime/stubRoutines.hpp"
  44 #include "runtime/thread.inline.hpp"
  45 #if INCLUDE_JVMCI
  46 #include "jvmci/jvmciJavaClasses.hpp"
  47 #include "jvmci/jvmciRuntime.hpp"
  48 #endif
  49 
  50 // -----------------------------------------------------
  51 // Implementation of JavaCallWrapper
  52 
  53 JavaCallWrapper::JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS) {
  54   JavaThread* thread = (JavaThread *)THREAD;
  55   bool clear_pending_exception = true;
  56 
  57   guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
  58   assert(!thread->owns_locks(), "must release all locks when leaving VM");
  59   guarantee(thread->can_call_java(), "cannot make java calls from the native compiler");
  60   _result   = result;
  61 
  62   // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
  63   // since it can potentially block.
  64   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
  65 
  66   // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
  67   // info, since we cannot find oops before the new information is set up completely.
  68   ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);
  69 
  70   // Make sure that we handle asynchronous stops and suspends _before_ we clear all thread state
  71   // in JavaCallWrapper::JavaCallWrapper(). This way, we can decide if we need to do any pd actions
  72   // to prepare for stop/suspend (flush register windows on sparcs, cache sp, or other state).
  73   if (thread->has_special_runtime_exit_condition()) {
  74     thread->handle_special_runtime_exit_condition();
  75     if (HAS_PENDING_EXCEPTION) {
  76       clear_pending_exception = false;
  77     }
  78   }
  79 
  80 
  81   // Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing
  82   // the JavaCallWrapper before the entry frame is on the stack.
  83   _callee_method = callee_method();
  84   _receiver = receiver();
  85 
  86 #ifdef CHECK_UNHANDLED_OOPS
  87   THREAD->allow_unhandled_oop(&_receiver);
  88 #endif // CHECK_UNHANDLED_OOPS
  89 
  90   _thread       = (JavaThread *)thread;
  91   _handles      = _thread->active_handles();    // save previous handle block & Java frame linkage
  92 
  93   // For the profiler, the last_Java_frame information in thread must always be in
  94   // legal state. We have no last Java frame if last_Java_sp == NULL so
  95   // the valid transition is to clear _last_Java_sp and then reset the rest of
  96   // the (platform specific) state.
  97 
  98   _anchor.copy(_thread->frame_anchor());
  99   _thread->frame_anchor()->clear();
 100 
 101   debug_only(_thread->inc_java_call_counter());
 102   _thread->set_active_handles(new_handles);     // install new handle block and reset Java frame linkage
 103 
 104   assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL");
 105 
 106   // clear any pending exception in thread (native calls start with no exception pending)
 107   if(clear_pending_exception) {
 108     _thread->clear_pending_exception();
 109   }
 110 
 111   if (_anchor.last_Java_sp() == NULL) {
 112     _thread->record_base_of_stack_pointer();
 113   }
 114 }
 115 
 116 
 117 JavaCallWrapper::~JavaCallWrapper() {
 118   assert(_thread == JavaThread::current(), "must still be the same thread");
 119 
 120   // restore previous handle block & Java frame linkage
 121   JNIHandleBlock *_old_handles = _thread->active_handles();
 122   _thread->set_active_handles(_handles);
 123 
 124   _thread->frame_anchor()->zap();
 125 
 126   debug_only(_thread->dec_java_call_counter());
 127 
 128   if (_anchor.last_Java_sp() == NULL) {
 129     _thread->set_base_of_stack_pointer(NULL);
 130   }
 131 
 132 
 133   // Old thread-local info. has been restored. We are not back in the VM.
 134   ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);
 135 
 136   // State has been restored now make the anchor frame visible for the profiler.
 137   // Do this after the transition because this allows us to put an assert
 138   // the Java->vm transition which checks to see that stack is not walkable
 139   // on sparc/ia64 which will catch violations of the reseting of last_Java_frame
 140   // invariants (i.e. _flags always cleared on return to Java)
 141 
 142   _thread->frame_anchor()->copy(&_anchor);
 143 
 144   // Release handles after we are marked as being inside the VM again, since this
 145   // operation might block
 146   JNIHandleBlock::release_block(_old_handles, _thread);
 147 }
 148 
 149 
 150 void JavaCallWrapper::oops_do(OopClosure* f) {
 151   if (!VTBuffer::is_in_vt_buffer(_receiver)) {
 152     f->do_oop((oop*)&_receiver);
 153   } else {
 154     assert(_receiver->is_value(), "Sanity check");
 155     BufferedValuesDealiaser* dealiaser = Thread::current()->buffered_values_dealiaser();
 156     assert(dealiaser != NULL, "Sanity check");
 157     dealiaser->oops_do(f, _receiver);
 158   }
 159   handles()->oops_do(f);
 160 }
 161 
 162 
 163 // Helper methods
 164 static BasicType runtime_type_from(JavaValue* result) {
 165   switch (result->get_type()) {
 166     case T_BOOLEAN: // fall through
 167     case T_CHAR   : // fall through
 168     case T_SHORT  : // fall through
 169     case T_INT    : // fall through
 170 #ifndef _LP64
 171     case T_OBJECT : // fall through
 172     case T_ARRAY  : // fall through
 173 #endif
 174     case T_BYTE   : // fall through
 175     case T_VOID   : return T_INT;
 176     case T_LONG   : return T_LONG;
 177     case T_FLOAT  : return T_FLOAT;
 178     case T_DOUBLE : return T_DOUBLE;
 179 #ifdef _LP64
 180     case T_ARRAY  : // fall through
 181     case T_OBJECT:  return T_OBJECT;
 182 #endif
 183     default:
 184       ShouldNotReachHere();
 185       return T_ILLEGAL;
 186   }
 187 }
 188 
 189 // ============ Virtual calls ============
 190 
 191 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 192   CallInfo callinfo;
 193   Handle receiver = args->receiver();
 194   Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();
 195   LinkInfo link_info(spec_klass, name, signature);
 196   LinkResolver::resolve_virtual_call(
 197           callinfo, receiver, recvrKlass, link_info, true, CHECK);
 198   methodHandle method = callinfo.selected_method();
 199   assert(method.not_null(), "should have thrown exception");
 200 
 201   // Invoke the method
 202   JavaCalls::call(result, method, args, CHECK);
 203 }
 204 
 205 
 206 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {
 207   JavaCallArguments args(receiver); // One oop argument
 208   call_virtual(result, spec_klass, name, signature, &args, CHECK);
 209 }
 210 
 211 
 212 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
 213   JavaCallArguments args(receiver); // One oop argument
 214   args.push_oop(arg1);
 215   call_virtual(result, spec_klass, name, signature, &args, CHECK);
 216 }
 217 
 218 
 219 
 220 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
 221   JavaCallArguments args(receiver); // One oop argument
 222   args.push_oop(arg1);
 223   args.push_oop(arg2);
 224   call_virtual(result, spec_klass, name, signature, &args, CHECK);
 225 }
 226 
 227 
 228 // ============ Special calls ============
 229 
 230 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 231   CallInfo callinfo;
 232   LinkInfo link_info(klass, name, signature);
 233   LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);
 234   methodHandle method = callinfo.selected_method();
 235   assert(method.not_null(), "should have thrown exception");
 236 
 237   // Invoke the method
 238   JavaCalls::call(result, method, args, CHECK);
 239 }
 240 
 241 
 242 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
 243   JavaCallArguments args(receiver); // One oop argument
 244   call_special(result, klass, name, signature, &args, CHECK);
 245 }
 246 
 247 
 248 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
 249   JavaCallArguments args(receiver); // One oop argument
 250   args.push_oop(arg1);
 251   call_special(result, klass, name, signature, &args, CHECK);
 252 }
 253 
 254 
 255 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
 256   JavaCallArguments args(receiver); // One oop argument
 257   args.push_oop(arg1);
 258   args.push_oop(arg2);
 259   call_special(result, klass, name, signature, &args, CHECK);
 260 }
 261 
 262 
 263 // ============ Static calls ============
 264 
 265 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
 266   CallInfo callinfo;
 267   LinkInfo link_info(klass, name, signature);
 268   LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);
 269   methodHandle method = callinfo.selected_method();
 270   assert(method.not_null(), "should have thrown exception");
 271 
 272   // Invoke the method
 273   JavaCalls::call(result, method, args, CHECK);
 274 }
 275 
 276 
 277 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
 278   JavaCallArguments args; // No 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, TRAPS) {
 284   JavaCallArguments args(arg1); // One oop argument
 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, TRAPS) {
 290   JavaCallArguments args; // One oop argument
 291   args.push_oop(arg1);
 292   args.push_oop(arg2);
 293   call_static(result, klass, name, signature, &args, CHECK);
 294 }
 295 
 296 
 297 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) {
 298   JavaCallArguments args; // One oop argument
 299   args.push_oop(arg1);
 300   args.push_oop(arg2);
 301   args.push_oop(arg3);
 302   call_static(result, klass, name, signature, &args, CHECK);
 303 }
 304 
 305 // -------------------------------------------------
 306 // Implementation of JavaCalls (low level)
 307 
 308 
 309 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
 310   // Check if we need to wrap a potential OS exception handler around thread
 311   // This is used for e.g. Win32 structured exception handlers
 312   assert(THREAD->is_Java_thread(), "only JavaThreads can make JavaCalls");
 313   // Need to wrap each and every time, since there might be native code down the
 314   // stack that has installed its own exception handlers
 315   os::os_exception_wrapper(call_helper, result, method, args, THREAD);
 316 }
 317 
 318 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
 319 
 320   JavaThread* thread = (JavaThread*)THREAD;
 321   assert(thread->is_Java_thread(), "must be called by a java thread");
 322   assert(method.not_null(), "must have a method to call");
 323   assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");
 324   assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");
 325 
 326 
 327   CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
 328 
 329 #if INCLUDE_JVMCI
 330   // Gets the nmethod (if any) that should be called instead of normal target
 331   nmethod* alternative_target = args->alternative_target();
 332   if (alternative_target == NULL) {
 333 #endif
 334 // Verify the arguments
 335 
 336   if (CheckJNICalls)  {
 337     args->verify(method, result->get_type());
 338   }
 339   else debug_only(args->verify(method, result->get_type()));
 340 #if INCLUDE_JVMCI
 341   }
 342 #else
 343 
 344   // Ignore call if method is empty
 345   if (method->is_empty_method()) {
 346     assert(result->get_type() == T_VOID, "an empty method must return a void value");
 347     return;
 348   }
 349 #endif
 350 
 351 #ifdef ASSERT
 352   { InstanceKlass* holder = method->method_holder();
 353     // A klass might not be initialized since JavaCall's might be used during the executing of
 354     // the <clinit>. For example, a Thread.start might start executing on an object that is
 355     // not fully initialized! (bad Java programming style)
 356     assert(holder->is_linked(), "rewriting must have taken place");
 357   }
 358 #endif
 359 
 360   CompilationPolicy::compile_if_required(method, CHECK);
 361 
 362   // Since the call stub sets up like the interpreter we call the from_interpreted_entry
 363   // so we can go compiled via a i2c. Otherwise initial entry method will always
 364   // run interpreted.
 365   address entry_point = method->from_interpreted_entry();
 366   if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
 367     entry_point = method->interpreter_entry();
 368   }
 369 
 370   // Figure out if the result value is an oop or not (Note: This is a different value
 371   // than result_type. result_type will be T_INT of oops. (it is about size)
 372   BasicType result_type = runtime_type_from(result);
 373   bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY);
 374 
 375   // NOTE: if we move the computation of the result_val_address inside
 376   // the call to call_stub, the optimizer produces wrong code.
 377   intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
 378 
 379   // Find receiver
 380   Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
 381 
 382   // When we reenter Java, we need to reenable the reserved/yellow zone which
 383   // might already be disabled when we are in VM.
 384   if (!thread->stack_guards_enabled()) {
 385     thread->reguard_stack();
 386   }
 387 
 388   // Check that there are shadow pages available before changing thread state
 389   // to Java. Calculate current_stack_pointer here to make sure
 390   // stack_shadow_pages_available() and bang_stack_shadow_pages() use the same sp.
 391   address sp = os::current_stack_pointer();
 392   if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
 393     // Throw stack overflow exception with preinitialized exception.
 394     Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
 395     return;
 396   } else {
 397     // Touch pages checked if the OS needs them to be touched to be mapped.
 398     os::map_stack_shadow_pages(sp);
 399   }
 400 
 401 #if INCLUDE_JVMCI
 402   if (alternative_target != NULL) {
 403     if (alternative_target->is_alive()) {
 404       thread->set_jvmci_alternate_call_target(alternative_target->verified_entry_point());
 405       entry_point = method->adapter()->get_i2c_entry();
 406     } else {
 407       THROW(vmSymbols::jdk_vm_ci_code_InvalidInstalledCodeException());
 408     }
 409   }
 410 #endif
 411 
 412   // do call
 413   { JavaCallWrapper link(method, receiver, result, CHECK);
 414     { HandleMark hm(thread);  // HandleMark used by HandleMarkCleaner
 415 
 416       StubRoutines::call_stub()(
 417         (address)&link,
 418         // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
 419         result_val_address,          // see NOTE above (compiler problem)
 420         result_type,
 421         method(),
 422         entry_point,
 423         args->parameters(),
 424         args->size_of_parameters(),
 425         CHECK
 426       );
 427 
 428       result = link.result();  // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
 429       // Preserve oop return value across possible gc points
 430       if (oop_result_flag) {
 431         thread->set_vm_result((oop) result->get_jobject());
 432       }
 433     }
 434   } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
 435 
 436   // Check if a thread stop or suspend should be executed
 437   // The following assert was not realistic.  Thread.stop can set that bit at any moment.
 438   //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
 439 
 440   // Restore possible oop return
 441   if (oop_result_flag) {
 442     result->set_jobject((jobject)thread->vm_result());
 443     thread->set_vm_result(NULL);
 444   }
 445 }
 446 
 447 
 448 //--------------------------------------------------------------------------------------
 449 // Implementation of JavaCallArguments
 450 
 451 inline bool is_value_state_indirect_oop(uint state) {
 452   assert(state != JavaCallArguments::value_state_oop,
 453          "Checking for handles after removal");
 454   assert(state < JavaCallArguments::value_state_limit,
 455          "Invalid value state %u", state);
 456   return state != JavaCallArguments::value_state_primitive;
 457 }
 458 
 459 inline oop resolve_indirect_oop(intptr_t value, uint state) {
 460   switch (state) {
 461   case JavaCallArguments::value_state_handle:
 462   {
 463     oop* ptr = reinterpret_cast<oop*>(value);
 464     return Handle::raw_resolve(ptr);
 465   }
 466 
 467   case JavaCallArguments::value_state_jobject:
 468   {
 469     jobject obj = reinterpret_cast<jobject>(value);
 470     return JNIHandles::resolve(obj);
 471   }
 472 
 473   default:
 474     ShouldNotReachHere();
 475     return NULL;
 476   }
 477 }
 478 
 479 intptr_t* JavaCallArguments::parameters() {
 480   // First convert all handles to oops
 481   for(int i = 0; i < _size; i++) {
 482     uint state = _value_state[i];
 483     assert(state != value_state_oop, "Multiple handle conversions");
 484     if (is_value_state_indirect_oop(state)) {
 485       oop obj = resolve_indirect_oop(_value[i], state);
 486       _value[i] = cast_from_oop<intptr_t>(obj);
 487       _value_state[i] = value_state_oop;
 488     }
 489   }
 490   // Return argument vector
 491   return _value;
 492 }
 493 
 494 
 495 class SignatureChekker : public SignatureIterator {
 496  private:
 497    int _pos;
 498    BasicType _return_type;
 499    u_char* _value_state;
 500    intptr_t* _value;
 501 
 502  public:
 503   bool _is_return;
 504 
 505   SignatureChekker(Symbol* signature,
 506                    BasicType return_type,
 507                    bool is_static,
 508                    u_char* value_state,
 509                    intptr_t* value) :
 510     SignatureIterator(signature),
 511     _pos(0),
 512     _return_type(return_type),
 513     _value_state(value_state),
 514     _value(value),
 515     _is_return(false)
 516   {
 517     if (!is_static) {
 518       check_value(true); // Receiver must be an oop
 519     }
 520   }
 521 
 522   void check_value(bool type) {
 523     uint state = _value_state[_pos++];
 524     if (type) {
 525       guarantee(is_value_state_indirect_oop(state),
 526                 "signature does not match pushed arguments: %u at %d",
 527                 state, _pos - 1);
 528     } else {
 529       guarantee(state == JavaCallArguments::value_state_primitive,
 530                 "signature does not match pushed arguments: %u at %d",
 531                 state, _pos - 1);
 532     }
 533   }
 534 
 535   void check_doing_return(bool state) { _is_return = state; }
 536 
 537   void check_return_type(BasicType t) {
 538     guarantee(_is_return && t == _return_type, "return type does not match");
 539   }
 540 
 541   void check_int(BasicType t) {
 542     if (_is_return) {
 543       check_return_type(t);
 544       return;
 545     }
 546     check_value(false);
 547   }
 548 
 549   void check_double(BasicType t) { check_long(t); }
 550 
 551   void check_long(BasicType t) {
 552     if (_is_return) {
 553       check_return_type(t);
 554       return;
 555     }
 556 
 557     check_value(false);
 558     check_value(false);
 559   }
 560 
 561   void check_obj(BasicType t) {
 562     if (_is_return) {
 563       check_return_type(t);
 564       return;
 565     }
 566 
 567     intptr_t v = _value[_pos];
 568     if (v != 0) {
 569       // v is a "handle" referring to an oop, cast to integral type.
 570       // There shouldn't be any handles in very low memory.
 571       guarantee((size_t)v >= (size_t)os::vm_page_size(),
 572                 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);
 573       // Verify the pointee.
 574       oop vv = resolve_indirect_oop(v, _value_state[_pos]);
 575       guarantee(oopDesc::is_oop_or_null(vv, true),
 576                 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
 577                 _pos, v, p2i(vv));
 578     }
 579 
 580     check_value(true);          // Verify value state.
 581   }
 582 
 583   void do_bool()                       { check_int(T_BOOLEAN);       }
 584   void do_char()                       { check_int(T_CHAR);          }
 585   void do_float()                      { check_int(T_FLOAT);         }
 586   void do_double()                     { check_double(T_DOUBLE);     }
 587   void do_byte()                       { check_int(T_BYTE);          }
 588   void do_short()                      { check_int(T_SHORT);         }
 589   void do_int()                        { check_int(T_INT);           }
 590   void do_long()                       { check_long(T_LONG);         }
 591   void do_void()                       { check_return_type(T_VOID);  }
 592   void do_object(int begin, int end)   { check_obj(T_OBJECT);        }
 593   void do_valuetype(int begin, int end){ check_obj(T_VALUETYPE);     }
 594   void do_array(int begin, int end)    { check_obj(T_OBJECT);        }
 595 };
 596 
 597 
 598 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
 599   guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
 600 
 601   // Treat T_OBJECT and T_ARRAY as the same
 602   if (return_type == T_ARRAY) return_type = T_OBJECT;
 603 
 604   // Check that oop information is correct
 605   Symbol* signature = method->signature();
 606 
 607   SignatureChekker sc(signature,
 608                       return_type,
 609                       method->is_static(),
 610                       _value_state,
 611                       _value);
 612   sc.iterate_parameters();
 613   sc.check_doing_return(true);
 614   sc.iterate_returntype();
 615 }