1 /* 2 * Copyright (c) 1997, 2022, 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 == NULL 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 assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL"); 100 101 MACOS_AARCH64_ONLY(_thread->enable_wx(WXExec)); 102 } 103 104 105 JavaCallWrapper::~JavaCallWrapper() { 106 assert(_thread == JavaThread::current(), "must still be the same thread"); 107 108 MACOS_AARCH64_ONLY(_thread->enable_wx(WXWrite)); 109 110 // restore previous handle block & Java frame linkage 111 JNIHandleBlock *_old_handles = _thread->active_handles(); 112 _thread->set_active_handles(_handles); 113 114 _thread->frame_anchor()->zap(); 115 116 debug_only(_thread->dec_java_call_counter()); 117 118 // Old thread-local info. has been restored. We are not back in the VM. 119 ThreadStateTransition::transition_from_java(_thread, _thread_in_vm); 120 121 // State has been restored now make the anchor frame visible for the profiler. 122 // Do this after the transition because this allows us to put an assert 123 // the Java->vm transition which checks to see that stack is not walkable 124 // on sparc/ia64 which will catch violations of the resetting of last_Java_frame 125 // invariants (i.e. _flags always cleared on return to Java) 126 127 _thread->frame_anchor()->copy(&_anchor); 128 129 // Release handles after we are marked as being inside the VM again, since this 130 // operation might block 131 JNIHandleBlock::release_block(_old_handles, _thread); 132 133 if (_thread->has_pending_exception() && _thread->has_last_Java_frame()) { 134 // If we get here, the Java code threw an exception that unwound a frame. 135 // It could be that the new frame anchor has not passed through the required 136 // StackWatermark barriers. Therefore, we process any such deferred unwind 137 // requests here. 138 StackWatermarkSet::after_unwind(_thread); 139 } 140 } 141 142 143 void JavaCallWrapper::oops_do(OopClosure* f) { 144 f->do_oop((oop*)&_receiver); 145 handles()->oops_do(f); 146 } 147 148 149 // Helper methods 150 static BasicType runtime_type_from(JavaValue* result) { 151 switch (result->get_type()) { 152 case T_BOOLEAN : // fall through 153 case T_CHAR : // fall through 154 case T_SHORT : // fall through 155 case T_INT : // fall through 156 #ifndef _LP64 157 case T_OBJECT : // fall through 158 case T_ARRAY : // fall through 159 case T_PRIMITIVE_OBJECT: // fall through 160 #endif 161 case T_BYTE : // fall through 162 case T_VOID : return T_INT; 163 case T_LONG : return T_LONG; 164 case T_FLOAT : return T_FLOAT; 165 case T_DOUBLE : return T_DOUBLE; 166 #ifdef _LP64 167 case T_ARRAY : // fall through 168 case T_OBJECT : return T_OBJECT; 169 case T_PRIMITIVE_OBJECT: return T_PRIMITIVE_OBJECT; 170 #endif 171 default: 172 ShouldNotReachHere(); 173 return T_ILLEGAL; 174 } 175 } 176 177 // ============ Virtual calls ============ 178 179 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) { 180 CallInfo callinfo; 181 Handle receiver = args->receiver(); 182 Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass(); 183 LinkInfo link_info(spec_klass, name, signature); 184 LinkResolver::resolve_virtual_call( 185 callinfo, receiver, recvrKlass, link_info, true, CHECK); 186 methodHandle method(THREAD, callinfo.selected_method()); 187 assert(method.not_null(), "should have thrown exception"); 188 189 // Invoke the method 190 JavaCalls::call(result, method, args, CHECK); 191 } 192 193 194 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) { 195 JavaCallArguments args(receiver); 196 call_virtual(result, spec_klass, name, signature, &args, CHECK); 197 } 198 199 200 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) { 201 JavaCallArguments args(receiver); 202 args.push_oop(arg1); 203 call_virtual(result, spec_klass, name, signature, &args, CHECK); 204 } 205 206 207 208 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) { 209 JavaCallArguments args(receiver); 210 args.push_oop(arg1); 211 args.push_oop(arg2); 212 call_virtual(result, spec_klass, name, signature, &args, CHECK); 213 } 214 215 216 // ============ Special calls ============ 217 218 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) { 219 CallInfo callinfo; 220 LinkInfo link_info(klass, name, signature); 221 LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK); 222 methodHandle method(THREAD, callinfo.selected_method()); 223 assert(method.not_null(), "should have thrown exception"); 224 225 // Invoke the method 226 JavaCalls::call(result, method, args, CHECK); 227 } 228 229 230 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) { 231 JavaCallArguments args(receiver); 232 call_special(result, klass, name, signature, &args, CHECK); 233 } 234 235 236 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) { 237 JavaCallArguments args(receiver); 238 args.push_oop(arg1); 239 call_special(result, klass, name, signature, &args, CHECK); 240 } 241 242 243 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) { 244 JavaCallArguments args(receiver); 245 args.push_oop(arg1); 246 args.push_oop(arg2); 247 call_special(result, klass, name, signature, &args, CHECK); 248 } 249 250 251 // ============ Static calls ============ 252 253 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) { 254 CallInfo callinfo; 255 LinkInfo link_info(klass, name, signature); 256 LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK); 257 methodHandle method(THREAD, callinfo.selected_method()); 258 assert(method.not_null(), "should have thrown exception"); 259 260 // Invoke the method 261 JavaCalls::call(result, method, args, CHECK); 262 } 263 264 265 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) { 266 JavaCallArguments args; 267 call_static(result, klass, name, signature, &args, CHECK); 268 } 269 270 271 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) { 272 JavaCallArguments args(arg1); 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, TRAPS) { 278 JavaCallArguments args; 279 args.push_oop(arg1); 280 args.push_oop(arg2); 281 call_static(result, klass, name, signature, &args, CHECK); 282 } 283 284 285 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) { 286 JavaCallArguments args; 287 args.push_oop(arg1); 288 args.push_oop(arg2); 289 args.push_oop(arg3); 290 call_static(result, klass, name, signature, &args, CHECK); 291 } 292 293 // ============ allocate and initialize new object instance ============ 294 295 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, JavaCallArguments* args, TRAPS) { 296 klass->initialize(CHECK_NH); // Quick no-op if already initialized. 297 298 // Special case for factory methods 299 if (EnableValhalla && !constructor_signature->is_void_method_signature()) { 300 guarantee(klass->is_inline_klass(), "inline classes must use factory methods"); 301 JavaValue factory_result(T_OBJECT); 302 JavaCalls::call_static(&factory_result, klass, 303 vmSymbols::inline_factory_name(), 304 constructor_signature, args, CHECK_NH); 305 return Handle(THREAD, factory_result.get_oop()); 306 } 307 308 // main branch of code creates a non-inline object: 309 assert(!klass->is_inline_klass(), "classic constructors are only for non-inline classes"); 310 Handle obj = klass->allocate_instance_handle(CHECK_NH); 311 JavaValue void_result(T_VOID); 312 args->set_receiver(obj); // inserts <obj> as the first argument. 313 JavaCalls::call_special(&void_result, klass, 314 vmSymbols::object_initializer_name(), 315 constructor_signature, args, CHECK_NH); 316 // Already returned a Null Handle if any exception is pending. 317 return obj; 318 } 319 320 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, TRAPS) { 321 JavaCallArguments args; 322 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD); 323 } 324 325 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, TRAPS) { 326 JavaCallArguments args; 327 args.push_oop(arg1); 328 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD); 329 } 330 331 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, Handle arg2, TRAPS) { 332 JavaCallArguments args; 333 args.push_oop(arg1); 334 args.push_oop(arg2); 335 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD); 336 } 337 338 // ------------------------------------------------- 339 // Implementation of JavaCalls (low level) 340 341 342 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) { 343 // Check if we need to wrap a potential OS exception handler around thread. 344 // This is used for e.g. Win32 structured exception handlers. 345 // Need to wrap each and every time, since there might be native code down the 346 // stack that has installed its own exception handlers. 347 os::os_exception_wrapper(call_helper, result, method, args, THREAD); 348 } 349 350 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) { 351 352 JavaThread* thread = THREAD; 353 assert(method.not_null(), "must have a method to call"); 354 assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation"); 355 assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here"); 356 357 // Verify the arguments 358 if (JVMCI_ONLY(args->alternative_target().is_null() &&) (DEBUG_ONLY(true ||) CheckJNICalls)) { 359 args->verify(method, result->get_type()); 360 } 361 // Ignore call if method is empty 362 if (JVMCI_ONLY(args->alternative_target().is_null() &&) method->is_empty_method()) { 363 assert(result->get_type() == T_VOID, "an empty method must return a void value"); 364 return; 365 } 366 367 #ifdef ASSERT 368 { InstanceKlass* holder = method->method_holder(); 369 // A klass might not be initialized since JavaCall's might be used during the executing of 370 // the <clinit>. For example, a Thread.start might start executing on an object that is 371 // not fully initialized! (bad Java programming style) 372 assert(holder->is_linked(), "rewriting must have taken place"); 373 } 374 #endif 375 376 CompilationPolicy::compile_if_required(method, CHECK); 377 378 // Since the call stub sets up like the interpreter we call the from_interpreted_entry 379 // so we can go compiled via a i2c. Otherwise initial entry method will always 380 // run interpreted. 381 address entry_point = method->from_interpreted_entry(); 382 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) { 383 entry_point = method->interpreter_entry(); 384 } 385 386 // Figure out if the result value is an oop or not (Note: This is a different value 387 // than result_type. result_type will be T_INT of oops. (it is about size) 388 BasicType result_type = runtime_type_from(result); 389 bool oop_result_flag = is_reference_type(result->get_type()); 390 391 // Find receiver 392 Handle receiver = (!method->is_static()) ? args->receiver() : Handle(); 393 394 // When we reenter Java, we need to re-enable the reserved/yellow zone which 395 // might already be disabled when we are in VM. 396 thread->stack_overflow_state()->reguard_stack_if_needed(); 397 398 // Check that there are shadow pages available before changing thread state 399 // to Java. Calculate current_stack_pointer here to make sure 400 // stack_shadow_pages_available() and map_stack_shadow_pages() use the same sp. 401 address sp = os::current_stack_pointer(); 402 if (!os::stack_shadow_pages_available(THREAD, method, sp)) { 403 // Throw stack overflow exception with preinitialized exception. 404 Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method); 405 return; 406 } else { 407 // Touch pages checked if the OS needs them to be touched to be mapped. 408 os::map_stack_shadow_pages(sp); 409 } 410 411 jobject value_buffer = NULL; 412 if (InlineTypeReturnedAsFields && (result->get_type() == T_PRIMITIVE_OBJECT || result->get_type() == T_OBJECT)) { 413 // Pre allocate a buffered inline type in case the result is returned 414 // flattened by compiled code 415 InlineKlass* vk = method->returns_inline_type(thread); 416 if (vk != NULL && vk->can_be_returned_as_fields()) { 417 oop instance = vk->allocate_instance(CHECK); 418 value_buffer = JNIHandles::make_local(thread, instance); 419 result->set_jobject(value_buffer); 420 } 421 } 422 423 // do call 424 { JavaCallWrapper link(method, receiver, result, CHECK); 425 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner 426 427 // NOTE: if we move the computation of the result_val_address inside 428 // the call to call_stub, the optimizer produces wrong code. 429 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr()); 430 intptr_t* parameter_address = args->parameters(); 431 #if INCLUDE_JVMCI 432 // Gets the alternative target (if any) that should be called 433 Handle alternative_target = args->alternative_target(); 434 if (!alternative_target.is_null()) { 435 // Must extract verified entry point from HotSpotNmethod after VM to Java 436 // transition in JavaCallWrapper constructor so that it is safe with 437 // respect to nmethod sweeping. 438 address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(NULL, alternative_target()); 439 if (verified_entry_point != NULL) { 440 thread->set_jvmci_alternate_call_target(verified_entry_point); 441 entry_point = method->adapter()->get_i2c_entry(); 442 } 443 } 444 #endif 445 StubRoutines::call_stub()( 446 (address)&link, 447 // (intptr_t*)&(result->_value), // see NOTE above (compiler problem) 448 result_val_address, // see NOTE above (compiler problem) 449 result_type, 450 method(), 451 entry_point, 452 parameter_address, 453 args->size_of_parameters(), 454 CHECK 455 ); 456 457 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call) 458 // Preserve oop return value across possible gc points 459 if (oop_result_flag) { 460 thread->set_vm_result(result->get_oop()); 461 } 462 } 463 } // Exit JavaCallWrapper (can block - potential return oop must be preserved) 464 465 // Check if a thread stop or suspend should be executed 466 // The following assert was not realistic. Thread.stop can set that bit at any moment. 467 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed"); 468 469 // Restore possible oop return 470 if (oop_result_flag) { 471 result->set_oop(thread->vm_result()); 472 thread->set_vm_result(NULL); 473 JNIHandles::destroy_local(value_buffer); 474 } 475 } 476 477 478 //-------------------------------------------------------------------------------------- 479 // Implementation of JavaCallArguments 480 481 inline bool is_value_state_indirect_oop(uint state) { 482 assert(state != JavaCallArguments::value_state_oop, 483 "Checking for handles after removal"); 484 assert(state < JavaCallArguments::value_state_limit, 485 "Invalid value state %u", state); 486 return state != JavaCallArguments::value_state_primitive; 487 } 488 489 inline oop resolve_indirect_oop(intptr_t value, uint state) { 490 switch (state) { 491 case JavaCallArguments::value_state_handle: 492 { 493 oop* ptr = reinterpret_cast<oop*>(value); 494 return Handle::raw_resolve(ptr); 495 } 496 497 case JavaCallArguments::value_state_jobject: 498 { 499 jobject obj = reinterpret_cast<jobject>(value); 500 return JNIHandles::resolve(obj); 501 } 502 503 default: 504 ShouldNotReachHere(); 505 return NULL; 506 } 507 } 508 509 intptr_t* JavaCallArguments::parameters() { 510 // First convert all handles to oops 511 for(int i = 0; i < _size; i++) { 512 uint state = _value_state[i]; 513 assert(state != value_state_oop, "Multiple handle conversions"); 514 if (is_value_state_indirect_oop(state)) { 515 oop obj = resolve_indirect_oop(_value[i], state); 516 _value[i] = cast_from_oop<intptr_t>(obj); 517 _value_state[i] = value_state_oop; 518 } 519 } 520 // Return argument vector 521 return _value; 522 } 523 524 525 class SignatureChekker : public SignatureIterator { 526 private: 527 int _pos; 528 BasicType _return_type; 529 u_char* _value_state; 530 intptr_t* _value; 531 532 public: 533 SignatureChekker(Symbol* signature, 534 BasicType return_type, 535 bool is_static, 536 u_char* value_state, 537 intptr_t* value) : 538 SignatureIterator(signature), 539 _pos(0), 540 _return_type(return_type), 541 _value_state(value_state), 542 _value(value) 543 { 544 if (!is_static) { 545 check_value(true); // Receiver must be an oop 546 } 547 do_parameters_on(this); 548 check_return_type(return_type); 549 } 550 551 private: 552 void check_value(bool is_reference) { 553 uint state = _value_state[_pos++]; 554 if (is_reference) { 555 guarantee(is_value_state_indirect_oop(state), 556 "signature does not match pushed arguments: %u at %d", 557 state, _pos - 1); 558 } else { 559 guarantee(state == JavaCallArguments::value_state_primitive, 560 "signature does not match pushed arguments: %u at %d", 561 state, _pos - 1); 562 } 563 } 564 565 void check_return_type(BasicType t) { 566 guarantee(t == _return_type, "return type does not match"); 567 } 568 569 void check_single_word() { 570 check_value(false); 571 } 572 573 void check_double_word() { 574 check_value(false); 575 check_value(false); 576 } 577 578 void check_reference() { 579 intptr_t v = _value[_pos]; 580 if (v != 0) { 581 // v is a "handle" referring to an oop, cast to integral type. 582 // There shouldn't be any handles in very low memory. 583 guarantee((size_t)v >= (size_t)os::vm_page_size(), 584 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v); 585 // Verify the pointee. 586 oop vv = resolve_indirect_oop(v, _value_state[_pos]); 587 guarantee(oopDesc::is_oop_or_null(vv, true), 588 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT, 589 _pos, v, p2i(vv)); 590 } 591 592 check_value(true); // Verify value state. 593 } 594 595 friend class SignatureIterator; // so do_parameters_on can call do_type 596 void do_type(BasicType type) { 597 switch (type) { 598 case T_BYTE: 599 case T_BOOLEAN: 600 case T_CHAR: 601 case T_SHORT: 602 case T_INT: 603 case T_FLOAT: // this one also 604 check_single_word(); break; 605 case T_LONG: 606 case T_DOUBLE: 607 check_double_word(); break; 608 case T_ARRAY: 609 case T_OBJECT: 610 case T_PRIMITIVE_OBJECT: 611 check_reference(); break; 612 default: 613 ShouldNotReachHere(); 614 } 615 } 616 }; 617 618 619 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) { 620 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed"); 621 622 // Treat T_OBJECT and T_ARRAY as the same 623 if (return_type == T_ARRAY) return_type = T_OBJECT; 624 625 // Check that oop information is correct 626 Symbol* signature = method->signature(); 627 628 SignatureChekker sc(signature, 629 return_type, 630 method->is_static(), 631 _value_state, 632 _value); 633 }