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 case T_PRIMITIVE_OBJECT: return T_PRIMITIVE_OBJECT;
168 #endif
169 default:
170 ShouldNotReachHere();
171 return T_ILLEGAL;
172 }
173 }
174
175 // ============ Virtual calls ============
176
177 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
178 CallInfo callinfo;
179 Handle receiver = args->receiver();
180 Klass* recvrKlass = receiver.is_null() ? (Klass*)nullptr : receiver->klass();
181 LinkInfo link_info(spec_klass, name, signature);
182 LinkResolver::resolve_virtual_call(
183 callinfo, receiver, recvrKlass, link_info, true, CHECK);
184 methodHandle method(THREAD, callinfo.selected_method());
185 assert(method.not_null(), "should have thrown exception");
186
187 // Invoke the method
188 JavaCalls::call(result, method, args, CHECK);
189 }
190
191
192 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {
193 JavaCallArguments args(receiver);
194 call_virtual(result, spec_klass, name, signature, &args, CHECK);
195 }
196
197
198 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
199 JavaCallArguments args(receiver);
200 args.push_oop(arg1);
201 call_virtual(result, spec_klass, name, signature, &args, CHECK);
202 }
203
204
205
206 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
207 JavaCallArguments args(receiver);
208 args.push_oop(arg1);
209 args.push_oop(arg2);
210 call_virtual(result, spec_klass, name, signature, &args, CHECK);
211 }
212
213
214 // ============ Special calls ============
215
216 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
217 CallInfo callinfo;
218 LinkInfo link_info(klass, name, signature);
219 LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);
220 methodHandle method(THREAD, callinfo.selected_method());
221 assert(method.not_null(), "should have thrown exception");
222
223 // Invoke the method
224 JavaCalls::call(result, method, args, CHECK);
225 }
226
227
228 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
229 JavaCallArguments args(receiver);
230 call_special(result, klass, name, signature, &args, CHECK);
231 }
232
233
234 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
235 JavaCallArguments args(receiver);
236 args.push_oop(arg1);
237 call_special(result, klass, name, signature, &args, CHECK);
238 }
239
240
241 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
242 JavaCallArguments args(receiver);
243 args.push_oop(arg1);
244 args.push_oop(arg2);
245 call_special(result, klass, name, signature, &args, CHECK);
246 }
247
248
249 // ============ Static calls ============
250
251 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
252 CallInfo callinfo;
253 LinkInfo link_info(klass, name, signature);
254 LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);
255 methodHandle method(THREAD, callinfo.selected_method());
256 assert(method.not_null(), "should have thrown exception");
257
258 // Invoke the method
259 JavaCalls::call(result, method, args, CHECK);
260 }
261
262
263 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
264 JavaCallArguments args;
265 call_static(result, klass, name, signature, &args, CHECK);
266 }
267
268
269 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
270 JavaCallArguments args(arg1);
271 call_static(result, klass, name, signature, &args, CHECK);
272 }
273
274
275 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
276 JavaCallArguments args;
277 args.push_oop(arg1);
278 args.push_oop(arg2);
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, Handle arg3, TRAPS) {
284 JavaCallArguments args;
285 args.push_oop(arg1);
286 args.push_oop(arg2);
287 args.push_oop(arg3);
288 call_static(result, klass, name, signature, &args, CHECK);
289 }
290
291 // ============ allocate and initialize new object instance ============
292
293 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, JavaCallArguments* args, TRAPS) {
294 klass->initialize(CHECK_NH); // Quick no-op if already initialized.
295
296 // Special case for factory methods
297 if (EnableValhalla && !constructor_signature->is_void_method_signature()) {
298 guarantee(klass->is_inline_klass(), "inline classes must use factory methods");
299 JavaValue factory_result(T_OBJECT);
300 JavaCalls::call_static(&factory_result, klass,
301 vmSymbols::inline_factory_name(),
302 constructor_signature, args, CHECK_NH);
303 return Handle(THREAD, factory_result.get_oop());
304 }
305
306 // main branch of code creates a non-inline object:
307 assert(!klass->is_inline_klass(), "classic constructors are only for non-inline classes");
308 Handle obj = klass->allocate_instance_handle(CHECK_NH);
309 JavaValue void_result(T_VOID);
310 args->set_receiver(obj); // inserts <obj> as the first argument.
311 JavaCalls::call_special(&void_result, klass,
312 vmSymbols::object_initializer_name(),
313 constructor_signature, args, CHECK_NH);
314 // Already returned a Null Handle if any exception is pending.
315 return obj;
316 }
317
318 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, TRAPS) {
319 JavaCallArguments args;
320 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
321 }
322
323 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, TRAPS) {
324 JavaCallArguments args;
325 args.push_oop(arg1);
326 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
327 }
328
329 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, Handle arg2, TRAPS) {
330 JavaCallArguments args;
331 args.push_oop(arg1);
332 args.push_oop(arg2);
333 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
334 }
335
336 // -------------------------------------------------
337 // Implementation of JavaCalls (low level)
338
339
340 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
341 // Check if we need to wrap a potential OS exception handler around thread.
342 // This is used for e.g. Win32 structured exception handlers.
343 // Need to wrap each and every time, since there might be native code down the
344 // stack that has installed its own exception handlers.
345 os::os_exception_wrapper(call_helper, result, method, args, THREAD);
346 }
347
348 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
349
350 JavaThread* thread = THREAD;
351 assert(method.not_null(), "must have a method to call");
352 assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");
353 assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");
354
355 // Verify the arguments
356 if (JVMCI_ONLY(args->alternative_target().is_null() &&) (DEBUG_ONLY(true ||) CheckJNICalls)) {
357 args->verify(method, result->get_type());
358 }
359 // Ignore call if method is empty
360 if (JVMCI_ONLY(args->alternative_target().is_null() &&) method->is_empty_method()) {
361 assert(result->get_type() == T_VOID, "an empty method must return a void value");
362 return;
363 }
364
365 #ifdef ASSERT
366 { InstanceKlass* holder = method->method_holder();
367 // A klass might not be initialized since JavaCall's might be used during the executing of
368 // the <clinit>. For example, a Thread.start might start executing on an object that is
369 // not fully initialized! (bad Java programming style)
370 assert(holder->is_linked(), "rewriting must have taken place");
371 }
372 #endif
373
374 CompilationPolicy::compile_if_required(method, CHECK);
375
376 // Since the call stub sets up like the interpreter we call the from_interpreted_entry
377 // so we can go compiled via a i2c. Otherwise initial entry method will always
378 // run interpreted.
379 address entry_point = method->from_interpreted_entry();
380 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
381 entry_point = method->interpreter_entry();
382 }
383
384 // Figure out if the result value is an oop or not (Note: This is a different value
385 // than result_type. result_type will be T_INT of oops. (it is about size)
386 BasicType result_type = runtime_type_from(result);
387 bool oop_result_flag = is_reference_type(result->get_type());
388
389 // Find receiver
390 Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
391
392 // When we reenter Java, we need to re-enable the reserved/yellow zone which
393 // might already be disabled when we are in VM.
394 thread->stack_overflow_state()->reguard_stack_if_needed();
395
396 // Check that there are shadow pages available before changing thread state
397 // to Java. Calculate current_stack_pointer here to make sure
398 // stack_shadow_pages_available() and map_stack_shadow_pages() use the same sp.
399 address sp = os::current_stack_pointer();
400 if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
401 // Throw stack overflow exception with preinitialized exception.
402 Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
403 return;
404 } else {
405 // Touch pages checked if the OS needs them to be touched to be mapped.
406 os::map_stack_shadow_pages(sp);
407 }
408
409 jobject value_buffer = nullptr;
410 if (InlineTypeReturnedAsFields && (result->get_type() == T_PRIMITIVE_OBJECT || result->get_type() == T_OBJECT)) {
411 // Pre allocate a buffered inline type in case the result is returned
412 // flattened by compiled code
413 InlineKlass* vk = method->returns_inline_type(thread);
414 if (vk != nullptr && vk->can_be_returned_as_fields()) {
415 oop instance = vk->allocate_instance(CHECK);
416 value_buffer = JNIHandles::make_local(thread, instance);
417 result->set_jobject(value_buffer);
418 }
419 }
420
421 // do call
422 { JavaCallWrapper link(method, receiver, result, CHECK);
423 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner
424
425 // NOTE: if we move the computation of the result_val_address inside
426 // the call to call_stub, the optimizer produces wrong code.
427 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
428 intptr_t* parameter_address = args->parameters();
429 #if INCLUDE_JVMCI
430 // Gets the alternative target (if any) that should be called
431 Handle alternative_target = args->alternative_target();
432 if (!alternative_target.is_null()) {
433 // Must extract verified entry point from HotSpotNmethod after VM to Java
434 // transition in JavaCallWrapper constructor so that it is safe with
435 // respect to nmethod sweeping.
436 address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(nullptr, alternative_target());
437 if (verified_entry_point != nullptr) {
438 thread->set_jvmci_alternate_call_target(verified_entry_point);
439 entry_point = method->adapter()->get_i2c_entry();
440 }
441 }
442 #endif
443 StubRoutines::call_stub()(
444 (address)&link,
445 // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
446 result_val_address, // see NOTE above (compiler problem)
447 result_type,
448 method(),
449 entry_point,
450 parameter_address,
451 args->size_of_parameters(),
452 CHECK
453 );
454
455 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
456 // Preserve oop return value across possible gc points
457 if (oop_result_flag) {
458 thread->set_vm_result(result->get_oop());
459 }
460 }
461 } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
462
463 // Check if a thread stop or suspend should be executed
464 // The following assert was not realistic. Thread.stop can set that bit at any moment.
465 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
466
467 // Restore possible oop return
468 if (oop_result_flag) {
469 result->set_oop(thread->vm_result());
470 thread->set_vm_result(nullptr);
471 JNIHandles::destroy_local(value_buffer);
472 }
473 }
474
475
476 //--------------------------------------------------------------------------------------
477 // Implementation of JavaCallArguments
478
479 inline bool is_value_state_indirect_oop(uint state) {
480 assert(state != JavaCallArguments::value_state_oop,
481 "Checking for handles after removal");
482 assert(state < JavaCallArguments::value_state_limit,
483 "Invalid value state %u", state);
484 return state != JavaCallArguments::value_state_primitive;
485 }
486
487 inline oop resolve_indirect_oop(intptr_t value, uint state) {
488 switch (state) {
489 case JavaCallArguments::value_state_handle:
490 {
491 oop* ptr = reinterpret_cast<oop*>(value);
492 return Handle::raw_resolve(ptr);
493 }
494
495 case JavaCallArguments::value_state_jobject:
496 {
497 jobject obj = reinterpret_cast<jobject>(value);
498 return JNIHandles::resolve(obj);
499 }
500
501 default:
502 ShouldNotReachHere();
503 return nullptr;
504 }
505 }
506
507 intptr_t* JavaCallArguments::parameters() {
508 // First convert all handles to oops
509 for(int i = 0; i < _size; i++) {
510 uint state = _value_state[i];
511 assert(state != value_state_oop, "Multiple handle conversions");
512 if (is_value_state_indirect_oop(state)) {
513 oop obj = resolve_indirect_oop(_value[i], state);
514 _value[i] = cast_from_oop<intptr_t>(obj);
515 _value_state[i] = value_state_oop;
516 }
517 }
518 // Return argument vector
519 return _value;
520 }
521
522
523 class SignatureChekker : public SignatureIterator {
524 private:
525 int _pos;
526 BasicType _return_type;
527 u_char* _value_state;
528 intptr_t* _value;
529
530 public:
531 SignatureChekker(Symbol* signature,
532 BasicType return_type,
533 bool is_static,
534 u_char* value_state,
535 intptr_t* value) :
536 SignatureIterator(signature),
537 _pos(0),
538 _return_type(return_type),
539 _value_state(value_state),
540 _value(value)
541 {
542 if (!is_static) {
543 check_value(true); // Receiver must be an oop
544 }
545 do_parameters_on(this);
546 check_return_type(return_type);
547 }
548
549 private:
550 void check_value(bool is_reference) {
551 uint state = _value_state[_pos++];
552 if (is_reference) {
553 guarantee(is_value_state_indirect_oop(state),
554 "signature does not match pushed arguments: %u at %d",
555 state, _pos - 1);
556 } else {
557 guarantee(state == JavaCallArguments::value_state_primitive,
558 "signature does not match pushed arguments: %u at %d",
559 state, _pos - 1);
560 }
561 }
562
563 void check_return_type(BasicType t) {
564 guarantee(t == _return_type, "return type does not match");
565 }
566
567 void check_single_word() {
568 check_value(false);
569 }
570
571 void check_double_word() {
572 check_value(false);
573 check_value(false);
574 }
575
576 void check_reference() {
577 intptr_t v = _value[_pos];
578 if (v != 0) {
579 // v is a "handle" referring to an oop, cast to integral type.
580 // There shouldn't be any handles in very low memory.
581 guarantee((size_t)v >= os::vm_page_size(),
582 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);
583 // Verify the pointee.
584 oop vv = resolve_indirect_oop(v, _value_state[_pos]);
585 guarantee(oopDesc::is_oop_or_null(vv, true),
586 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
587 _pos, v, p2i(vv));
588 }
589
590 check_value(true); // Verify value state.
591 }
592
593 friend class SignatureIterator; // so do_parameters_on can call do_type
594 void do_type(BasicType type) {
595 switch (type) {
596 case T_BYTE:
597 case T_BOOLEAN:
598 case T_CHAR:
599 case T_SHORT:
600 case T_INT:
601 case T_FLOAT: // this one also
602 check_single_word(); break;
603 case T_LONG:
604 case T_DOUBLE:
605 check_double_word(); break;
606 case T_ARRAY:
607 case T_OBJECT:
608 case T_PRIMITIVE_OBJECT:
609 check_reference(); break;
610 default:
611 ShouldNotReachHere();
612 }
613 }
614 };
615
616
617 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
618 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
619
620 // Treat T_OBJECT and T_ARRAY as the same
621 if (return_type == T_ARRAY) return_type = T_OBJECT;
622
623 // Check that oop information is correct
624 Symbol* signature = method->signature();
625
626 SignatureChekker sc(signature,
627 return_type,
628 method->is_static(),
629 _value_state,
630 _value);
631 }