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 #if INCLUDE_JVMCI
34 #include "jvmci/jvmciJavaClasses.hpp"
35 #endif
36 #include "memory/universe.hpp"
37 #include "oops/method.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "oops/inlineKlass.hpp"
40 #include "prims/jniCheck.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/interfaceSupport.inline.hpp"
44 #include "runtime/javaCalls.hpp"
45 #include "runtime/jniHandles.inline.hpp"
46 #include "runtime/mutexLocker.hpp"
47 #include "runtime/os.inline.hpp"
48 #include "runtime/sharedRuntime.hpp"
49 #include "runtime/signature.hpp"
50 #include "runtime/stubRoutines.hpp"
51 #include "runtime/thread.inline.hpp"
52
53 // -----------------------------------------------------
54 // Implementation of JavaCallWrapper
55
56 JavaCallWrapper::JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS) {
57 JavaThread* thread = THREAD;
58
59 guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
60 assert(!thread->owns_locks(), "must release all locks when leaving VM");
61 guarantee(thread->can_call_java(), "cannot make java calls from the native compiler");
62 _result = result;
63
64 // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
65 // since it can potentially block.
66 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
67
68 // clear any pending exception in thread (native calls start with no exception pending)
69 thread->clear_pending_exception();
70
71 // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
72 // info, since we cannot find oops before the new information is set up completely.
73 ThreadStateTransition::transition_from_vm(thread, _thread_in_Java, true /* check_asyncs */);
74
75 // Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing
76 // the JavaCallWrapper before the entry frame is on the stack.
77 _callee_method = callee_method();
78 _receiver = receiver();
79
80 #ifdef CHECK_UNHANDLED_OOPS
81 THREAD->allow_unhandled_oop(&_receiver);
82 #endif // CHECK_UNHANDLED_OOPS
83
84 _thread = thread;
85 _handles = _thread->active_handles(); // save previous handle block & Java frame linkage
86
87 // For the profiler, the last_Java_frame information in thread must always be in
88 // legal state. We have no last Java frame if last_Java_sp == NULL so
89 // the valid transition is to clear _last_Java_sp and then reset the rest of
90 // the (platform specific) state.
91
92 _anchor.copy(_thread->frame_anchor());
93 _thread->frame_anchor()->clear();
94
95 debug_only(_thread->inc_java_call_counter());
96 _thread->set_active_handles(new_handles); // install new handle block and reset Java frame linkage
97
98 assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL");
99
100 MACOS_AARCH64_ONLY(_thread->enable_wx(WXExec));
101 }
102
103
104 JavaCallWrapper::~JavaCallWrapper() {
105 assert(_thread == JavaThread::current(), "must still be the same thread");
106
107 MACOS_AARCH64_ONLY(_thread->enable_wx(WXWrite));
108
109 // restore previous handle block & Java frame linkage
110 JNIHandleBlock *_old_handles = _thread->active_handles();
111 _thread->set_active_handles(_handles);
112
113 _thread->frame_anchor()->zap();
114
115 debug_only(_thread->dec_java_call_counter());
116
117 // Old thread-local info. has been restored. We are not back in the VM.
118 ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);
119
120 // State has been restored now make the anchor frame visible for the profiler.
121 // Do this after the transition because this allows us to put an assert
122 // the Java->vm transition which checks to see that stack is not walkable
123 // on sparc/ia64 which will catch violations of the reseting of last_Java_frame
124 // invariants (i.e. _flags always cleared on return to Java)
125
126 _thread->frame_anchor()->copy(&_anchor);
127
128 // Release handles after we are marked as being inside the VM again, since this
129 // operation might block
130 JNIHandleBlock::release_block(_old_handles, _thread);
131
132 if (_thread->has_pending_exception() && _thread->has_last_Java_frame()) {
133 // If we get here, the Java code threw an exception that unwound a frame.
134 // It could be that the new frame anchor has not passed through the required
135 // StackWatermark barriers. Therefore, we process any such deferred unwind
136 // requests here.
137 StackWatermarkSet::after_unwind(_thread);
138 }
139 }
140
141
142 void JavaCallWrapper::oops_do(OopClosure* f) {
143 f->do_oop((oop*)&_receiver);
144 handles()->oops_do(f);
145 }
146
147
148 // Helper methods
149 static BasicType runtime_type_from(JavaValue* result) {
150 switch (result->get_type()) {
151 case T_BOOLEAN : // fall through
152 case T_CHAR : // fall through
153 case T_SHORT : // fall through
154 case T_INT : // fall through
155 #ifndef _LP64
156 case T_OBJECT : // fall through
157 case T_ARRAY : // fall through
158 case T_PRIMITIVE_OBJECT: // fall through
159 #endif
160 case T_BYTE : // fall through
161 case T_VOID : return T_INT;
162 case T_LONG : return T_LONG;
163 case T_FLOAT : return T_FLOAT;
164 case T_DOUBLE : return T_DOUBLE;
165 #ifdef _LP64
166 case T_ARRAY : // fall through
167 case T_OBJECT : return T_OBJECT;
168 case T_PRIMITIVE_OBJECT: return T_PRIMITIVE_OBJECT;
169 #endif
170 default:
171 ShouldNotReachHere();
172 return T_ILLEGAL;
173 }
174 }
175
176 // ============ Virtual calls ============
177
178 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
179 CallInfo callinfo;
180 Handle receiver = args->receiver();
181 Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();
182 LinkInfo link_info(spec_klass, name, signature);
183 LinkResolver::resolve_virtual_call(
184 callinfo, receiver, recvrKlass, link_info, true, CHECK);
185 methodHandle method(THREAD, callinfo.selected_method());
186 assert(method.not_null(), "should have thrown exception");
187
188 // Invoke the method
189 JavaCalls::call(result, method, args, CHECK);
190 }
191
192
193 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {
194 JavaCallArguments args(receiver);
195 call_virtual(result, spec_klass, name, signature, &args, CHECK);
196 }
197
198
199 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
200 JavaCallArguments args(receiver);
201 args.push_oop(arg1);
202 call_virtual(result, spec_klass, name, signature, &args, CHECK);
203 }
204
205
206
207 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
208 JavaCallArguments args(receiver);
209 args.push_oop(arg1);
210 args.push_oop(arg2);
211 call_virtual(result, spec_klass, name, signature, &args, CHECK);
212 }
213
214
215 // ============ Special calls ============
216
217 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
218 CallInfo callinfo;
219 LinkInfo link_info(klass, name, signature);
220 LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);
221 methodHandle method(THREAD, callinfo.selected_method());
222 assert(method.not_null(), "should have thrown exception");
223
224 // Invoke the method
225 JavaCalls::call(result, method, args, CHECK);
226 }
227
228
229 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
230 JavaCallArguments args(receiver);
231 call_special(result, klass, name, signature, &args, CHECK);
232 }
233
234
235 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
236 JavaCallArguments args(receiver);
237 args.push_oop(arg1);
238 call_special(result, klass, name, signature, &args, CHECK);
239 }
240
241
242 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
243 JavaCallArguments args(receiver);
244 args.push_oop(arg1);
245 args.push_oop(arg2);
246 call_special(result, klass, name, signature, &args, CHECK);
247 }
248
249
250 // ============ Static calls ============
251
252 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
253 CallInfo callinfo;
254 LinkInfo link_info(klass, name, signature);
255 LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);
256 methodHandle method(THREAD, callinfo.selected_method());
257 assert(method.not_null(), "should have thrown exception");
258
259 // Invoke the method
260 JavaCalls::call(result, method, args, CHECK);
261 }
262
263
264 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
265 JavaCallArguments args;
266 call_static(result, klass, name, signature, &args, CHECK);
267 }
268
269
270 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
271 JavaCallArguments args(arg1);
272 call_static(result, klass, name, signature, &args, CHECK);
273 }
274
275
276 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
277 JavaCallArguments args;
278 args.push_oop(arg1);
279 args.push_oop(arg2);
280 call_static(result, klass, name, signature, &args, CHECK);
281 }
282
283
284 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) {
285 JavaCallArguments args;
286 args.push_oop(arg1);
287 args.push_oop(arg2);
288 args.push_oop(arg3);
289 call_static(result, klass, name, signature, &args, CHECK);
290 }
291
292 // ============ allocate and initialize new object instance ============
293
294 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, JavaCallArguments* args, TRAPS) {
295 klass->initialize(CHECK_NH); // Quick no-op if already initialized.
296
297 // Special case for factory methods
298 if (!constructor_signature->is_void_method_signature()) {
299 assert(klass->is_inline_klass(), "inline classes must use factory methods");
300 JavaValue factory_result(T_OBJECT);
301 JavaCalls::call_static(&factory_result, klass,
302 vmSymbols::object_initializer_name(),
303 constructor_signature, args, CHECK_NH);
304 return Handle(THREAD, factory_result.get_oop());
305 }
306
307 // main branch of code creates a non-inline object:
308 assert(!klass->is_inline_klass(), "classic constructors are only for non-inline classes");
309 Handle obj = klass->allocate_instance_handle(CHECK_NH);
310 JavaValue void_result(T_VOID);
311 args->set_receiver(obj); // inserts <obj> as the first argument.
312 JavaCalls::call_special(&void_result, klass,
313 vmSymbols::object_initializer_name(),
314 constructor_signature, args, CHECK_NH);
315 // Already returned a Null Handle if any exception is pending.
316 return obj;
317 }
318
319 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, TRAPS) {
320 JavaCallArguments args;
321 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
322 }
323
324 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, TRAPS) {
325 JavaCallArguments args;
326 args.push_oop(arg1);
327 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
328 }
329
330 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, Handle arg2, TRAPS) {
331 JavaCallArguments args;
332 args.push_oop(arg1);
333 args.push_oop(arg2);
334 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
335 }
336
337 // -------------------------------------------------
338 // Implementation of JavaCalls (low level)
339
340
341 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
342 // Check if we need to wrap a potential OS exception handler around thread.
343 // This is used for e.g. Win32 structured exception handlers.
344 // Need to wrap each and every time, since there might be native code down the
345 // stack that has installed its own exception handlers.
346 os::os_exception_wrapper(call_helper, result, method, args, THREAD);
347 }
348
349 void JavaCalls::call_helper(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
350
351 JavaThread* thread = THREAD;
352 assert(method.not_null(), "must have a method to call");
353 assert(!SafepointSynchronize::is_at_safepoint(), "call to Java code during VM operation");
354 assert(!thread->handle_area()->no_handle_mark_active(), "cannot call out to Java here");
355
356 // Verify the arguments
357 if (JVMCI_ONLY(args->alternative_target().is_null() &&) (DEBUG_ONLY(true ||) CheckJNICalls)) {
358 args->verify(method, result->get_type());
359 }
360 // Ignore call if method is empty
361 if (JVMCI_ONLY(args->alternative_target().is_null() &&) method->is_empty_method()) {
362 assert(result->get_type() == T_VOID, "an empty method must return a void value");
363 return;
364 }
365
366 #ifdef ASSERT
367 { InstanceKlass* holder = method->method_holder();
368 // A klass might not be initialized since JavaCall's might be used during the executing of
369 // the <clinit>. For example, a Thread.start might start executing on an object that is
370 // not fully initialized! (bad Java programming style)
371 assert(holder->is_linked(), "rewriting must have taken place");
372 }
373 #endif
374
375 CompilationPolicy::compile_if_required(method, CHECK);
376
377 // Since the call stub sets up like the interpreter we call the from_interpreted_entry
378 // so we can go compiled via a i2c. Otherwise initial entry method will always
379 // run interpreted.
380 address entry_point = method->from_interpreted_entry();
381 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
382 entry_point = method->interpreter_entry();
383 }
384
385 // Figure out if the result value is an oop or not (Note: This is a different value
386 // than result_type. result_type will be T_INT of oops. (it is about size)
387 BasicType result_type = runtime_type_from(result);
388 bool oop_result_flag = is_reference_type(result->get_type());
389
390 // Find receiver
391 Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
392
393 // When we reenter Java, we need to reenable the reserved/yellow zone which
394 // might already be disabled when we are in VM.
395 thread->stack_overflow_state()->reguard_stack_if_needed();
396
397 // Check that there are shadow pages available before changing thread state
398 // to Java. Calculate current_stack_pointer here to make sure
399 // stack_shadow_pages_available() and map_stack_shadow_pages() use the same sp.
400 address sp = os::current_stack_pointer();
401 if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
402 // Throw stack overflow exception with preinitialized exception.
403 Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
404 return;
405 } else {
406 // Touch pages checked if the OS needs them to be touched to be mapped.
407 os::map_stack_shadow_pages(sp);
408 }
409
410 jobject value_buffer = NULL;
411 if (InlineTypeReturnedAsFields && (result->get_type() == T_PRIMITIVE_OBJECT || result->get_type() == T_OBJECT)) {
412 // Pre allocate a buffered inline type in case the result is returned
413 // flattened by compiled code
414 InlineKlass* vk = method->returns_inline_type(thread);
415 if (vk != NULL && vk->can_be_returned_as_fields()) {
416 oop instance = vk->allocate_instance(CHECK);
417 value_buffer = JNIHandles::make_local(thread, instance);
418 result->set_jobject(value_buffer);
419 }
420 }
421
422 // do call
423 { JavaCallWrapper link(method, receiver, result, CHECK);
424 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner
425
426 // NOTE: if we move the computation of the result_val_address inside
427 // the call to call_stub, the optimizer produces wrong code.
428 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
429 intptr_t* parameter_address = args->parameters();
430 #if INCLUDE_JVMCI
431 // Gets the alternative target (if any) that should be called
432 Handle alternative_target = args->alternative_target();
433 if (!alternative_target.is_null()) {
434 // Must extract verified entry point from HotSpotNmethod after VM to Java
435 // transition in JavaCallWrapper constructor so that it is safe with
436 // respect to nmethod sweeping.
437 address verified_entry_point = (address) HotSpotJVMCI::InstalledCode::entryPoint(NULL, alternative_target());
438 if (verified_entry_point != NULL) {
439 thread->set_jvmci_alternate_call_target(verified_entry_point);
440 entry_point = method->adapter()->get_i2c_entry();
441 }
442 }
443 #endif
444 StubRoutines::call_stub()(
445 (address)&link,
446 // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
447 result_val_address, // see NOTE above (compiler problem)
448 result_type,
449 method(),
450 entry_point,
451 parameter_address,
452 args->size_of_parameters(),
453 CHECK
454 );
455
456 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
457 // Preserve oop return value across possible gc points
458 if (oop_result_flag) {
459 thread->set_vm_result(result->get_oop());
460 }
461 }
462 } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
463
464 // Check if a thread stop or suspend should be executed
465 // The following assert was not realistic. Thread.stop can set that bit at any moment.
466 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
467
468 // Restore possible oop return
469 if (oop_result_flag) {
470 result->set_oop(thread->vm_result());
471 thread->set_vm_result(NULL);
472 JNIHandles::destroy_local(value_buffer);
473 }
474 }
475
476
477 //--------------------------------------------------------------------------------------
478 // Implementation of JavaCallArguments
479
480 inline bool is_value_state_indirect_oop(uint state) {
481 assert(state != JavaCallArguments::value_state_oop,
482 "Checking for handles after removal");
483 assert(state < JavaCallArguments::value_state_limit,
484 "Invalid value state %u", state);
485 return state != JavaCallArguments::value_state_primitive;
486 }
487
488 inline oop resolve_indirect_oop(intptr_t value, uint state) {
489 switch (state) {
490 case JavaCallArguments::value_state_handle:
491 {
492 oop* ptr = reinterpret_cast<oop*>(value);
493 return Handle::raw_resolve(ptr);
494 }
495
496 case JavaCallArguments::value_state_jobject:
497 {
498 jobject obj = reinterpret_cast<jobject>(value);
499 return JNIHandles::resolve(obj);
500 }
501
502 default:
503 ShouldNotReachHere();
504 return NULL;
505 }
506 }
507
508 intptr_t* JavaCallArguments::parameters() {
509 // First convert all handles to oops
510 for(int i = 0; i < _size; i++) {
511 uint state = _value_state[i];
512 assert(state != value_state_oop, "Multiple handle conversions");
513 if (is_value_state_indirect_oop(state)) {
514 oop obj = resolve_indirect_oop(_value[i], state);
515 _value[i] = cast_from_oop<intptr_t>(obj);
516 _value_state[i] = value_state_oop;
517 }
518 }
519 // Return argument vector
520 return _value;
521 }
522
523
524 class SignatureChekker : public SignatureIterator {
525 private:
526 int _pos;
527 BasicType _return_type;
528 u_char* _value_state;
529 intptr_t* _value;
530
531 public:
532 SignatureChekker(Symbol* signature,
533 BasicType return_type,
534 bool is_static,
535 u_char* value_state,
536 intptr_t* value) :
537 SignatureIterator(signature),
538 _pos(0),
539 _return_type(return_type),
540 _value_state(value_state),
541 _value(value)
542 {
543 if (!is_static) {
544 check_value(true); // Receiver must be an oop
545 }
546 do_parameters_on(this);
547 check_return_type(return_type);
548 }
549
550 private:
551 void check_value(bool is_reference) {
552 uint state = _value_state[_pos++];
553 if (is_reference) {
554 guarantee(is_value_state_indirect_oop(state),
555 "signature does not match pushed arguments: %u at %d",
556 state, _pos - 1);
557 } else {
558 guarantee(state == JavaCallArguments::value_state_primitive,
559 "signature does not match pushed arguments: %u at %d",
560 state, _pos - 1);
561 }
562 }
563
564 void check_return_type(BasicType t) {
565 guarantee(t == _return_type, "return type does not match");
566 }
567
568 void check_single_word() {
569 check_value(false);
570 }
571
572 void check_double_word() {
573 check_value(false);
574 check_value(false);
575 }
576
577 void check_reference() {
578 intptr_t v = _value[_pos];
579 if (v != 0) {
580 // v is a "handle" referring to an oop, cast to integral type.
581 // There shouldn't be any handles in very low memory.
582 guarantee((size_t)v >= (size_t)os::vm_page_size(),
583 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);
584 // Verify the pointee.
585 oop vv = resolve_indirect_oop(v, _value_state[_pos]);
586 guarantee(oopDesc::is_oop_or_null(vv, true),
587 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
588 _pos, v, p2i(vv));
589 }
590
591 check_value(true); // Verify value state.
592 }
593
594 friend class SignatureIterator; // so do_parameters_on can call do_type
595 void do_type(BasicType type) {
596 switch (type) {
597 case T_BYTE:
598 case T_BOOLEAN:
599 case T_CHAR:
600 case T_SHORT:
601 case T_INT:
602 case T_FLOAT: // this one also
603 check_single_word(); break;
604 case T_LONG:
605 case T_DOUBLE:
606 check_double_word(); break;
607 case T_ARRAY:
608 case T_OBJECT:
609 case T_PRIMITIVE_OBJECT:
610 check_reference(); break;
611 default:
612 ShouldNotReachHere();
613 }
614 }
615 };
616
617
618 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
619 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
620
621 // Treat T_OBJECT and T_ARRAY as the same
622 if (return_type == T_ARRAY) return_type = T_OBJECT;
623
624 // Check that oop information is correct
625 Symbol* signature = method->signature();
626
627 SignatureChekker sc(signature,
628 return_type,
629 method->is_static(),
630 _value_state,
631 _value);
632 }