1 /* 2 * Copyright (c) 1997, 2023, 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 // Do this after the transition because this allows us to put an assert 121 // the Java->vm transition which checks to see that stack is not walkable 122 // on sparc/ia64 which will catch violations of the resetting of last_Java_frame 123 // invariants (i.e. _flags always cleared on return to Java) 124 125 _thread->frame_anchor()->copy(&_anchor); 126 127 // Release handles after we are marked as being inside the VM again, since this 128 // operation might block 129 JNIHandleBlock::release_block(_old_handles, _thread); 130 131 if (_thread->has_pending_exception() && _thread->has_last_Java_frame()) { 132 // If we get here, the Java code threw an exception that unwound a frame. 133 // It could be that the new frame anchor has not passed through the required 134 // StackWatermark barriers. Therefore, we process any such deferred unwind 135 // requests here. 136 StackWatermarkSet::after_unwind(_thread); 137 } 138 } 139 140 141 void JavaCallWrapper::oops_do(OopClosure* f) { 142 f->do_oop((oop*)&_receiver); 143 handles()->oops_do(f); 144 } 145 146 147 // Helper methods 148 static BasicType runtime_type_from(JavaValue* result) { 149 switch (result->get_type()) { 150 case T_BOOLEAN : // fall through 151 case T_CHAR : // fall through 152 case T_SHORT : // fall through 153 case T_INT : // fall through 154 #ifndef _LP64 155 case T_OBJECT : // fall through 156 case T_ARRAY : // fall through 157 case T_PRIMITIVE_OBJECT: // fall through 158 #endif 159 case T_BYTE : // fall through 160 case T_VOID : return T_INT; 161 case T_LONG : return T_LONG; 162 case T_FLOAT : return T_FLOAT; 163 case T_DOUBLE : return T_DOUBLE; 164 #ifdef _LP64 165 case T_ARRAY : // fall through 166 case T_OBJECT : return T_OBJECT; 167 #endif 168 default: 169 ShouldNotReachHere(); 170 return T_ILLEGAL; 171 } 172 } 173 174 // ============ Virtual calls ============ 175 176 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) { 177 CallInfo callinfo; 178 Handle receiver = args->receiver(); 179 Klass* recvrKlass = receiver.is_null() ? (Klass*)nullptr : receiver->klass(); 180 LinkInfo link_info(spec_klass, name, signature); 181 LinkResolver::resolve_virtual_call( 182 callinfo, receiver, recvrKlass, link_info, true, CHECK); 183 methodHandle method(THREAD, callinfo.selected_method()); 184 assert(method.not_null(), "should have thrown exception"); 185 186 // Invoke the method 187 JavaCalls::call(result, method, args, CHECK); 188 } 189 190 191 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) { 192 JavaCallArguments args(receiver); 193 call_virtual(result, spec_klass, name, signature, &args, CHECK); 194 } 195 196 197 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) { 198 JavaCallArguments args(receiver); 199 args.push_oop(arg1); 200 call_virtual(result, spec_klass, name, signature, &args, CHECK); 201 } 202 203 204 205 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) { 206 JavaCallArguments args(receiver); 207 args.push_oop(arg1); 208 args.push_oop(arg2); 209 call_virtual(result, spec_klass, name, signature, &args, CHECK); 210 } 211 212 213 // ============ Special calls ============ 214 215 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) { 216 CallInfo callinfo; 217 LinkInfo link_info(klass, name, signature); 218 LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK); 219 methodHandle method(THREAD, callinfo.selected_method()); 220 assert(method.not_null(), "should have thrown exception"); 221 222 // Invoke the method 223 JavaCalls::call(result, method, args, CHECK); 224 } 225 226 227 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) { 228 JavaCallArguments args(receiver); 229 call_special(result, klass, name, signature, &args, CHECK); 230 } 231 232 233 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) { 234 JavaCallArguments args(receiver); 235 args.push_oop(arg1); 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, Handle arg2, TRAPS) { 241 JavaCallArguments args(receiver); 242 args.push_oop(arg1); 243 args.push_oop(arg2); 244 call_special(result, klass, name, signature, &args, CHECK); 245 } 246 247 248 // ============ Static calls ============ 249 250 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) { 251 CallInfo callinfo; 252 LinkInfo link_info(klass, name, signature); 253 LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK); 254 methodHandle method(THREAD, callinfo.selected_method()); 255 assert(method.not_null(), "should have thrown exception"); 256 257 // Invoke the method 258 JavaCalls::call(result, method, args, CHECK); 259 } 260 261 262 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) { 263 JavaCallArguments args; 264 call_static(result, klass, name, signature, &args, CHECK); 265 } 266 267 268 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) { 269 JavaCallArguments args(arg1); 270 call_static(result, klass, name, signature, &args, CHECK); 271 } 272 273 274 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) { 275 JavaCallArguments args; 276 args.push_oop(arg1); 277 args.push_oop(arg2); 278 call_static(result, klass, name, signature, &args, CHECK); 279 } 280 281 282 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) { 283 JavaCallArguments args; 284 args.push_oop(arg1); 285 args.push_oop(arg2); 286 args.push_oop(arg3); 287 call_static(result, klass, name, signature, &args, CHECK); 288 } 289 290 // ============ allocate and initialize new object instance ============ 291 292 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, JavaCallArguments* args, TRAPS) { 293 klass->initialize(CHECK_NH); // Quick no-op if already initialized. 294 Handle obj = klass->allocate_instance_handle(CHECK_NH); 295 JavaValue void_result(T_VOID); 296 args->set_receiver(obj); // inserts <obj> as the first argument. 297 JavaCalls::call_special(&void_result, klass, 298 vmSymbols::object_initializer_name(), 299 constructor_signature, args, CHECK_NH); 300 // Already returned a Null Handle if any exception is pending. 301 return obj; 302 } 303 304 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, TRAPS) { 305 JavaCallArguments args; 306 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD); 307 } 308 309 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, TRAPS) { 310 JavaCallArguments args; 311 args.push_oop(arg1); 312 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD); 313 } 314 315 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, Handle arg2, TRAPS) { 316 JavaCallArguments args; 317 args.push_oop(arg1); 318 args.push_oop(arg2); 319 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD); 320 } 321 322 // ------------------------------------------------- 323 // Implementation of JavaCalls (low level) 324 325 326 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) { 327 // Check if we need to wrap a potential OS exception handler around thread. 328 // This is used for e.g. Win32 structured exception handlers. 329 // Need to wrap each and every time, since there might be native code down the 330 // stack that has installed its own exception handlers. 331 os::os_exception_wrapper(call_helper, result, method, args, THREAD); 332 } 333 334 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) { 335 336 JavaThread* thread = THREAD; 337 assert(method.not_null(), "must have a method to call"); 338 assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation"); 339 assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here"); 340 341 // Verify the arguments 342 if (JVMCI_ONLY(args->alternative_target().is_null() &&) (DEBUG_ONLY(true ||) CheckJNICalls)) { 343 args->verify(method, result->get_type()); 344 } 345 // Ignore call if method is empty 346 if (JVMCI_ONLY(args->alternative_target().is_null() &&) method->is_empty_method()) { 347 assert(result->get_type() == T_VOID, "an empty method must return a void value"); 348 return; 349 } 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 = is_reference_type(result->get_type()); 374 375 // Find receiver 376 Handle receiver = (!method->is_static()) ? args->receiver() : Handle(); 377 378 // When we reenter Java, we need to re-enable the reserved/yellow zone which 379 // might already be disabled when we are in VM. 380 thread->stack_overflow_state()->reguard_stack_if_needed(); 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 map_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 jobject value_buffer = nullptr; 396 if (InlineTypeReturnedAsFields && (result->get_type() == T_OBJECT)) { 397 // Pre allocate a buffered inline type in case the result is returned 398 // flattened by compiled code 399 InlineKlass* vk = method->returns_inline_type(thread); 400 if (vk != nullptr && vk->can_be_returned_as_fields()) { 401 oop instance = vk->allocate_instance(CHECK); 402 value_buffer = JNIHandles::make_local(thread, instance); 403 result->set_jobject(value_buffer); 404 } 405 } 406 407 // do call 408 { JavaCallWrapper link(method, receiver, result, CHECK); 409 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner 410 411 // NOTE: if we move the computation of the result_val_address inside 412 // the call to call_stub, the optimizer produces wrong code. 413 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr()); 414 intptr_t* parameter_address = args->parameters(); 415 #if INCLUDE_JVMCI 416 // Gets the alternative target (if any) that should be called 417 Handle alternative_target = args->alternative_target(); 418 if (!alternative_target.is_null()) { 419 // Must extract verified entry point from HotSpotNmethod after VM to Java 420 // transition in JavaCallWrapper constructor so that it is safe with 421 // respect to nmethod sweeping. 422 address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(nullptr, alternative_target()); 423 if (verified_entry_point != nullptr) { 424 thread->set_jvmci_alternate_call_target(verified_entry_point); 425 entry_point = method->adapter()->get_i2c_entry(); 426 } 427 } 428 #endif 429 StubRoutines::call_stub()( 430 (address)&link, 431 // (intptr_t*)&(result->_value), // see NOTE above (compiler problem) 432 result_val_address, // see NOTE above (compiler problem) 433 result_type, 434 method(), 435 entry_point, 436 parameter_address, 437 args->size_of_parameters(), 438 CHECK 439 ); 440 441 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call) 442 // Preserve oop return value across possible gc points 443 if (oop_result_flag) { 444 thread->set_vm_result(result->get_oop()); 445 } 446 } 447 } // Exit JavaCallWrapper (can block - potential return oop must be preserved) 448 449 // Check if a thread stop or suspend should be executed 450 // The following assert was not realistic. Thread.stop can set that bit at any moment. 451 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed"); 452 453 // Restore possible oop return 454 if (oop_result_flag) { 455 result->set_oop(thread->vm_result()); 456 thread->set_vm_result(nullptr); 457 JNIHandles::destroy_local(value_buffer); 458 } 459 } 460 461 462 //-------------------------------------------------------------------------------------- 463 // Implementation of JavaCallArguments 464 465 inline bool is_value_state_indirect_oop(uint state) { 466 assert(state != JavaCallArguments::value_state_oop, 467 "Checking for handles after removal"); 468 assert(state < JavaCallArguments::value_state_limit, 469 "Invalid value state %u", state); 470 return state != JavaCallArguments::value_state_primitive; 471 } 472 473 inline oop resolve_indirect_oop(intptr_t value, uint state) { 474 switch (state) { 475 case JavaCallArguments::value_state_handle: 476 { 477 oop* ptr = reinterpret_cast<oop*>(value); 478 return Handle::raw_resolve(ptr); 479 } 480 481 case JavaCallArguments::value_state_jobject: 482 { 483 jobject obj = reinterpret_cast<jobject>(value); 484 return JNIHandles::resolve(obj); 485 } 486 487 default: 488 ShouldNotReachHere(); 489 return nullptr; 490 } 491 } 492 493 intptr_t* JavaCallArguments::parameters() { 494 // First convert all handles to oops 495 for(int i = 0; i < _size; i++) { 496 uint state = _value_state[i]; 497 assert(state != value_state_oop, "Multiple handle conversions"); 498 if (is_value_state_indirect_oop(state)) { 499 oop obj = resolve_indirect_oop(_value[i], state); 500 _value[i] = cast_from_oop<intptr_t>(obj); 501 _value_state[i] = value_state_oop; 502 } 503 } 504 // Return argument vector 505 return _value; 506 } 507 508 509 class SignatureChekker : public SignatureIterator { 510 private: 511 int _pos; 512 BasicType _return_type; 513 u_char* _value_state; 514 intptr_t* _value; 515 516 public: 517 SignatureChekker(Symbol* signature, 518 BasicType return_type, 519 bool is_static, 520 u_char* value_state, 521 intptr_t* value) : 522 SignatureIterator(signature), 523 _pos(0), 524 _return_type(return_type), 525 _value_state(value_state), 526 _value(value) 527 { 528 if (!is_static) { 529 check_value(true); // Receiver must be an oop 530 } 531 do_parameters_on(this); 532 check_return_type(return_type); 533 } 534 535 private: 536 void check_value(bool is_reference) { 537 uint state = _value_state[_pos++]; 538 if (is_reference) { 539 guarantee(is_value_state_indirect_oop(state), 540 "signature does not match pushed arguments: %u at %d", 541 state, _pos - 1); 542 } else { 543 guarantee(state == JavaCallArguments::value_state_primitive, 544 "signature does not match pushed arguments: %u at %d", 545 state, _pos - 1); 546 } 547 } 548 549 void check_return_type(BasicType t) { 550 guarantee(t == _return_type, "return type does not match"); 551 } 552 553 void check_single_word() { 554 check_value(false); 555 } 556 557 void check_double_word() { 558 check_value(false); 559 check_value(false); 560 } 561 562 void check_reference() { 563 intptr_t v = _value[_pos]; 564 if (v != 0) { 565 // v is a "handle" referring to an oop, cast to integral type. 566 // There shouldn't be any handles in very low memory. 567 guarantee((size_t)v >= os::vm_page_size(), 568 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v); 569 // Verify the pointee. 570 oop vv = resolve_indirect_oop(v, _value_state[_pos]); 571 guarantee(oopDesc::is_oop_or_null(vv, true), 572 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT, 573 _pos, v, p2i(vv)); 574 } 575 576 check_value(true); // Verify value state. 577 } 578 579 friend class SignatureIterator; // so do_parameters_on can call do_type 580 void do_type(BasicType type) { 581 switch (type) { 582 case T_BYTE: 583 case T_BOOLEAN: 584 case T_CHAR: 585 case T_SHORT: 586 case T_INT: 587 case T_FLOAT: // this one also 588 check_single_word(); break; 589 case T_LONG: 590 case T_DOUBLE: 591 check_double_word(); break; 592 case T_ARRAY: 593 case T_OBJECT: 594 check_reference(); break; 595 default: 596 ShouldNotReachHere(); 597 } 598 } 599 }; 600 601 602 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) { 603 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed"); 604 605 // Treat T_OBJECT and T_ARRAY as the same 606 if (return_type == T_ARRAY) return_type = T_OBJECT; 607 608 // Check that oop information is correct 609 Symbol* signature = method->signature(); 610 611 SignatureChekker sc(signature, 612 return_type, 613 method->is_static(), 614 _value_state, 615 _value); 616 }