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/javaThread.hpp"
46 #include "runtime/jniHandles.inline.hpp"
47 #include "runtime/mutexLocker.hpp"
48 #include "runtime/os.inline.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/signature.hpp"
51 #include "runtime/stubRoutines.hpp"
52 #include "runtime/thread.inline.hpp"
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 (!constructor_signature->is_void_method_signature()) {
300 assert(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::object_initializer_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 }