1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "code/nmethod.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/method.inline.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "oops/valueKlass.hpp"
36 #include "prims/jniCheck.hpp"
37 #include "runtime/compilationPolicy.hpp"
38 #include "runtime/handles.inline.hpp"
39 #include "runtime/interfaceSupport.inline.hpp"
40 #include "runtime/javaCalls.hpp"
41 #include "runtime/jniHandles.inline.hpp"
42 #include "runtime/mutexLocker.hpp"
43 #include "runtime/os.inline.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/signature.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "runtime/thread.inline.hpp"
48 #if INCLUDE_JVMCI
49 #include "jvmci/jvmciJavaClasses.hpp"
50 #include "jvmci/jvmciRuntime.hpp"
51 #endif
52
53 // -----------------------------------------------------
54 // Implementation of JavaCallWrapper
55
56 JavaCallWrapper::JavaCallWrapper(const methodHandle& callee_method, Handle receiver, JavaValue* result, TRAPS) {
57 JavaThread* thread = (JavaThread *)THREAD;
58 bool clear_pending_exception = true;
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 // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
70 // info, since we cannot find oops before the new information is set up completely.
71 ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);
72
73 // Make sure that we handle asynchronous stops and suspends _before_ we clear all thread state
74 // in JavaCallWrapper::JavaCallWrapper(). This way, we can decide if we need to do any pd actions
75 // to prepare for stop/suspend (flush register windows on sparcs, cache sp, or other state).
76 if (thread->has_special_runtime_exit_condition()) {
77 thread->handle_special_runtime_exit_condition();
78 if (HAS_PENDING_EXCEPTION) {
79 clear_pending_exception = false;
80 }
81 }
82
83
84 // Make sure to set the oop's after the thread transition - since we can block there. No one is GC'ing
85 // the JavaCallWrapper before the entry frame is on the stack.
86 _callee_method = callee_method();
87 _receiver = receiver();
88
89 #ifdef CHECK_UNHANDLED_OOPS
90 THREAD->allow_unhandled_oop(&_receiver);
91 #endif // CHECK_UNHANDLED_OOPS
92
93 _thread = (JavaThread *)thread;
94 _handles = _thread->active_handles(); // save previous handle block & Java frame linkage
95
96 // For the profiler, the last_Java_frame information in thread must always be in
97 // legal state. We have no last Java frame if last_Java_sp == NULL so
98 // the valid transition is to clear _last_Java_sp and then reset the rest of
99 // the (platform specific) state.
100
101 _anchor.copy(_thread->frame_anchor());
102 _thread->frame_anchor()->clear();
103
104 debug_only(_thread->inc_java_call_counter());
105 _thread->set_active_handles(new_handles); // install new handle block and reset Java frame linkage
106
107 assert (_thread->thread_state() != _thread_in_native, "cannot set native pc to NULL");
108
109 // clear any pending exception in thread (native calls start with no exception pending)
110 if(clear_pending_exception) {
111 _thread->clear_pending_exception();
112 }
113
114 if (_anchor.last_Java_sp() == NULL) {
115 _thread->record_base_of_stack_pointer();
116 }
117 }
118
119
120 JavaCallWrapper::~JavaCallWrapper() {
121 assert(_thread == JavaThread::current(), "must still be the same thread");
122
123 // restore previous handle block & Java frame linkage
124 JNIHandleBlock *_old_handles = _thread->active_handles();
125 _thread->set_active_handles(_handles);
126
127 _thread->frame_anchor()->zap();
128
129 debug_only(_thread->dec_java_call_counter());
130
131 if (_anchor.last_Java_sp() == NULL) {
132 _thread->set_base_of_stack_pointer(NULL);
133 }
134
135
136 // Old thread-local info. has been restored. We are not back in the VM.
137 ThreadStateTransition::transition_from_java(_thread, _thread_in_vm);
138
139 // State has been restored now make the anchor frame visible for the profiler.
140 // Do this after the transition because this allows us to put an assert
141 // the Java->vm transition which checks to see that stack is not walkable
142 // on sparc/ia64 which will catch violations of the reseting of last_Java_frame
143 // invariants (i.e. _flags always cleared on return to Java)
144
145 _thread->frame_anchor()->copy(&_anchor);
146
147 // Release handles after we are marked as being inside the VM again, since this
148 // operation might block
149 JNIHandleBlock::release_block(_old_handles, _thread);
150 }
151
152
153 void JavaCallWrapper::oops_do(OopClosure* f) {
154 f->do_oop((oop*)&_receiver);
155 handles()->oops_do(f);
156 }
157
158
159 // Helper methods
160 static BasicType runtime_type_from(JavaValue* result) {
161 switch (result->get_type()) {
162 case T_BOOLEAN : // fall through
163 case T_CHAR : // fall through
164 case T_SHORT : // fall through
165 case T_INT : // fall through
166 #ifndef _LP64
167 case T_OBJECT : // fall through
168 case T_ARRAY : // fall through
169 case T_VALUETYPE: // fall through
170 #endif
171 case T_BYTE : // fall through
172 case T_VOID : return T_INT;
173 case T_LONG : return T_LONG;
174 case T_FLOAT : return T_FLOAT;
175 case T_DOUBLE : return T_DOUBLE;
176 #ifdef _LP64
177 case T_ARRAY : // fall through
178 case T_OBJECT : return T_OBJECT;
179 case T_VALUETYPE: return T_VALUETYPE;
180 #endif
181 default:
182 ShouldNotReachHere();
183 return T_ILLEGAL;
184 }
185 }
186
187 // ============ Virtual calls ============
188
189 void JavaCalls::call_virtual(JavaValue* result, Klass* spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
190 CallInfo callinfo;
191 Handle receiver = args->receiver();
192 Klass* recvrKlass = receiver.is_null() ? (Klass*)NULL : receiver->klass();
193 LinkInfo link_info(spec_klass, name, signature);
194 LinkResolver::resolve_virtual_call(
195 callinfo, receiver, recvrKlass, link_info, true, CHECK);
196 methodHandle method = callinfo.selected_method();
197 assert(method.not_null(), "should have thrown exception");
198
199 // Invoke the method
200 JavaCalls::call(result, method, args, CHECK);
201 }
202
203
204 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, TRAPS) {
205 JavaCallArguments args(receiver);
206 call_virtual(result, spec_klass, name, signature, &args, CHECK);
207 }
208
209
210 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
211 JavaCallArguments args(receiver);
212 args.push_oop(arg1);
213 call_virtual(result, spec_klass, name, signature, &args, CHECK);
214 }
215
216
217
218 void JavaCalls::call_virtual(JavaValue* result, Handle receiver, Klass* spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
219 JavaCallArguments args(receiver);
220 args.push_oop(arg1);
221 args.push_oop(arg2);
222 call_virtual(result, spec_klass, name, signature, &args, CHECK);
223 }
224
225
226 // ============ Special calls ============
227
228 void JavaCalls::call_special(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
229 CallInfo callinfo;
230 LinkInfo link_info(klass, name, signature);
231 LinkResolver::resolve_special_call(callinfo, args->receiver(), link_info, CHECK);
232 methodHandle method = callinfo.selected_method();
233 assert(method.not_null(), "should have thrown exception");
234
235 // Invoke the method
236 JavaCalls::call(result, method, args, CHECK);
237 }
238
239
240 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
241 JavaCallArguments args(receiver);
242 call_special(result, klass, name, signature, &args, CHECK);
243 }
244
245
246 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
247 JavaCallArguments args(receiver);
248 args.push_oop(arg1);
249 call_special(result, klass, name, signature, &args, CHECK);
250 }
251
252
253 void JavaCalls::call_special(JavaValue* result, Handle receiver, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
254 JavaCallArguments args(receiver);
255 args.push_oop(arg1);
256 args.push_oop(arg2);
257 call_special(result, klass, name, signature, &args, CHECK);
258 }
259
260
261 // ============ Static calls ============
262
263 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS) {
264 CallInfo callinfo;
265 LinkInfo link_info(klass, name, signature);
266 LinkResolver::resolve_static_call(callinfo, link_info, true, CHECK);
267 methodHandle method = callinfo.selected_method();
268 assert(method.not_null(), "should have thrown exception");
269
270 // Invoke the method
271 JavaCalls::call(result, method, args, CHECK);
272 }
273
274
275 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, TRAPS) {
276 JavaCallArguments args;
277 call_static(result, klass, name, signature, &args, CHECK);
278 }
279
280
281 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS) {
282 JavaCallArguments args(arg1);
283 call_static(result, klass, name, signature, &args, CHECK);
284 }
285
286
287 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS) {
288 JavaCallArguments args;
289 args.push_oop(arg1);
290 args.push_oop(arg2);
291 call_static(result, klass, name, signature, &args, CHECK);
292 }
293
294
295 void JavaCalls::call_static(JavaValue* result, Klass* klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, Handle arg3, TRAPS) {
296 JavaCallArguments args;
297 args.push_oop(arg1);
298 args.push_oop(arg2);
299 args.push_oop(arg3);
300 call_static(result, klass, name, signature, &args, CHECK);
301 }
302
303 // ============ allocate and initialize new object instance ============
304
305 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, JavaCallArguments* args, TRAPS) {
306 klass->initialize(CHECK_NH); // Quick no-op if already initialized.
307 Handle obj = klass->allocate_instance_handle(CHECK_NH);
308 JavaValue void_result(T_VOID);
309 args->set_receiver(obj); // inserts <obj> as the first argument.
310 JavaCalls::call_special(&void_result, klass,
311 vmSymbols::object_initializer_name(),
312 constructor_signature, args, CHECK_NH);
313 // Already returned a Null Handle if any exception is pending.
314 return obj;
315 }
316
317 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, TRAPS) {
318 JavaCallArguments args;
319 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
320 }
321
322 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, TRAPS) {
323 JavaCallArguments args;
324 args.push_oop(arg1);
325 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
326 }
327
328 Handle JavaCalls::construct_new_instance(InstanceKlass* klass, Symbol* constructor_signature, Handle arg1, Handle arg2, TRAPS) {
329 JavaCallArguments args;
330 args.push_oop(arg1);
331 args.push_oop(arg2);
332 return JavaCalls::construct_new_instance(klass, constructor_signature, &args, THREAD);
333 }
334
335 // -------------------------------------------------
336 // Implementation of JavaCalls (low level)
337
338
339 void JavaCalls::call(JavaValue* result, const methodHandle& method, JavaCallArguments* args, TRAPS) {
340 // Check if we need to wrap a potential OS exception handler around thread
341 // This is used for e.g. Win32 structured exception handlers
342 assert(THREAD->is_Java_thread(), "only JavaThreads can make JavaCalls");
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 = (JavaThread*)THREAD;
351 assert(thread->is_Java_thread(), "must be called by a java 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
357 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
358
359 #if INCLUDE_JVMCI
360 // Gets the nmethod (if any) that should be called instead of normal target
361 nmethod* alternative_target = args->alternative_target();
362 if (alternative_target == NULL) {
363 #endif
364 // Verify the arguments
365
366 if (CheckJNICalls) {
367 args->verify(method, result->get_type());
368 }
369 else debug_only(args->verify(method, result->get_type()));
370 #if INCLUDE_JVMCI
371 }
372 #else
373
374 // Ignore call if method is empty
375 if (method->is_empty_method()) {
376 assert(result->get_type() == T_VOID, "an empty method must return a void value");
377 return;
378 }
379 #endif
380
381 #ifdef ASSERT
382 { InstanceKlass* holder = method->method_holder();
383 // A klass might not be initialized since JavaCall's might be used during the executing of
384 // the <clinit>. For example, a Thread.start might start executing on an object that is
385 // not fully initialized! (bad Java programming style)
386 assert(holder->is_linked(), "rewriting must have taken place");
387 }
388 #endif
389
390 CompilationPolicy::compile_if_required(method, CHECK);
391
392 // Since the call stub sets up like the interpreter we call the from_interpreted_entry
393 // so we can go compiled via a i2c. Otherwise initial entry method will always
394 // run interpreted.
395 address entry_point = method->from_interpreted_entry();
396 if (JvmtiExport::can_post_interpreter_events() && thread->is_interp_only_mode()) {
397 entry_point = method->interpreter_entry();
398 }
399
400 // Figure out if the result value is an oop or not (Note: This is a different value
401 // than result_type. result_type will be T_INT of oops. (it is about size)
402 BasicType result_type = runtime_type_from(result);
403 bool oop_result_flag = (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY
404 || result->get_type() == T_VALUETYPE);
405
406 // NOTE: if we move the computation of the result_val_address inside
407 // the call to call_stub, the optimizer produces wrong code.
408 intptr_t* result_val_address = (intptr_t*)(result->get_value_addr());
409
410 // Find receiver
411 Handle receiver = (!method->is_static()) ? args->receiver() : Handle();
412
413 // When we reenter Java, we need to reenable the reserved/yellow zone which
414 // might already be disabled when we are in VM.
415 if (!thread->stack_guards_enabled()) {
416 thread->reguard_stack();
417 }
418
419 // Check that there are shadow pages available before changing thread state
420 // to Java. Calculate current_stack_pointer here to make sure
421 // stack_shadow_pages_available() and bang_stack_shadow_pages() use the same sp.
422 address sp = os::current_stack_pointer();
423 if (!os::stack_shadow_pages_available(THREAD, method, sp)) {
424 // Throw stack overflow exception with preinitialized exception.
425 Exceptions::throw_stack_overflow_exception(THREAD, __FILE__, __LINE__, method);
426 return;
427 } else {
428 // Touch pages checked if the OS needs them to be touched to be mapped.
429 os::map_stack_shadow_pages(sp);
430 }
431
432 #if INCLUDE_JVMCI
433 if (alternative_target != NULL) {
434 if (alternative_target->is_alive() && !alternative_target->is_unloading()) {
435 thread->set_jvmci_alternate_call_target(alternative_target->verified_entry_point());
436 entry_point = method->adapter()->get_i2c_entry();
437 } else {
438 THROW(vmSymbols::jdk_vm_ci_code_InvalidInstalledCodeException());
439 }
440 }
441 #endif
442
443 // do call
444 { JavaCallWrapper link(method, receiver, result, CHECK);
445 { HandleMark hm(thread); // HandleMark used by HandleMarkCleaner
446
447 StubRoutines::call_stub()(
448 (address)&link,
449 // (intptr_t*)&(result->_value), // see NOTE above (compiler problem)
450 result_val_address, // see NOTE above (compiler problem)
451 result_type,
452 method(),
453 entry_point,
454 args->parameters(),
455 args->size_of_parameters(),
456 CHECK
457 );
458
459 result = link.result(); // circumvent MS C++ 5.0 compiler bug (result is clobbered across call)
460 // Preserve oop return value across possible gc points
461 if (oop_result_flag) {
462 thread->set_vm_result((oop) result->get_jobject());
463 }
464 }
465 } // Exit JavaCallWrapper (can block - potential return oop must be preserved)
466
467 // Check if a thread stop or suspend should be executed
468 // The following assert was not realistic. Thread.stop can set that bit at any moment.
469 //assert(!thread->has_special_runtime_exit_condition(), "no async. exceptions should be installed");
470
471 // Restore possible oop return
472 if (oop_result_flag) {
473 result->set_jobject((jobject)thread->vm_result());
474 thread->set_vm_result(NULL);
475 }
476 }
477
478
479 //--------------------------------------------------------------------------------------
480 // Implementation of JavaCallArguments
481
482 inline bool is_value_state_indirect_oop(uint state) {
483 assert(state != JavaCallArguments::value_state_oop,
484 "Checking for handles after removal");
485 assert(state < JavaCallArguments::value_state_limit,
486 "Invalid value state %u", state);
487 return state != JavaCallArguments::value_state_primitive;
488 }
489
490 inline oop resolve_indirect_oop(intptr_t value, uint state) {
491 switch (state) {
492 case JavaCallArguments::value_state_handle:
493 {
494 oop* ptr = reinterpret_cast<oop*>(value);
495 return Handle::raw_resolve(ptr);
496 }
497
498 case JavaCallArguments::value_state_jobject:
499 {
500 jobject obj = reinterpret_cast<jobject>(value);
501 return JNIHandles::resolve(obj);
502 }
503
504 default:
505 ShouldNotReachHere();
506 return NULL;
507 }
508 }
509
510 intptr_t* JavaCallArguments::parameters() {
511 // First convert all handles to oops
512 for(int i = 0; i < _size; i++) {
513 uint state = _value_state[i];
514 assert(state != value_state_oop, "Multiple handle conversions");
515 if (is_value_state_indirect_oop(state)) {
516 oop obj = resolve_indirect_oop(_value[i], state);
517 _value[i] = cast_from_oop<intptr_t>(obj);
518 _value_state[i] = value_state_oop;
519 }
520 }
521 // Return argument vector
522 return _value;
523 }
524
525
526 class SignatureChekker : public SignatureIterator {
527 private:
528 int _pos;
529 BasicType _return_type;
530 u_char* _value_state;
531 intptr_t* _value;
532
533 public:
534 bool _is_return;
535
536 SignatureChekker(Symbol* signature,
537 BasicType return_type,
538 bool is_static,
539 u_char* value_state,
540 intptr_t* value) :
541 SignatureIterator(signature),
542 _pos(0),
543 _return_type(return_type),
544 _value_state(value_state),
545 _value(value),
546 _is_return(false)
547 {
548 if (!is_static) {
549 check_value(true); // Receiver must be an oop
550 }
551 }
552
553 void check_value(bool type) {
554 uint state = _value_state[_pos++];
555 if (type) {
556 guarantee(is_value_state_indirect_oop(state),
557 "signature does not match pushed arguments: %u at %d",
558 state, _pos - 1);
559 } else {
560 guarantee(state == JavaCallArguments::value_state_primitive,
561 "signature does not match pushed arguments: %u at %d",
562 state, _pos - 1);
563 }
564 }
565
566 void check_doing_return(bool state) { _is_return = state; }
567
568 void check_return_type(BasicType t) {
569 guarantee(_is_return && t == _return_type, "return type does not match");
570 }
571
572 void check_int(BasicType t) {
573 if (_is_return) {
574 check_return_type(t);
575 return;
576 }
577 check_value(false);
578 }
579
580 void check_double(BasicType t) { check_long(t); }
581
582 void check_long(BasicType t) {
583 if (_is_return) {
584 check_return_type(t);
585 return;
586 }
587
588 check_value(false);
589 check_value(false);
590 }
591
592 void check_obj(BasicType t) {
593 if (_is_return) {
594 check_return_type(t);
595 return;
596 }
597
598 intptr_t v = _value[_pos];
599 if (v != 0) {
600 // v is a "handle" referring to an oop, cast to integral type.
601 // There shouldn't be any handles in very low memory.
602 guarantee((size_t)v >= (size_t)os::vm_page_size(),
603 "Bad JNI oop argument %d: " PTR_FORMAT, _pos, v);
604 // Verify the pointee.
605 oop vv = resolve_indirect_oop(v, _value_state[_pos]);
606 guarantee(oopDesc::is_oop_or_null(vv, true),
607 "Bad JNI oop argument %d: " PTR_FORMAT " -> " PTR_FORMAT,
608 _pos, v, p2i(vv));
609 }
610
611 check_value(true); // Verify value state.
612 }
613
614 void do_bool() { check_int(T_BOOLEAN); }
615 void do_char() { check_int(T_CHAR); }
616 void do_float() { check_int(T_FLOAT); }
617 void do_double() { check_double(T_DOUBLE); }
618 void do_byte() { check_int(T_BYTE); }
619 void do_short() { check_int(T_SHORT); }
620 void do_int() { check_int(T_INT); }
621 void do_long() { check_long(T_LONG); }
622 void do_void() { check_return_type(T_VOID); }
623 void do_object(int begin, int end) { check_obj(T_OBJECT); }
624 void do_valuetype(int begin, int end){ check_obj(T_VALUETYPE); }
625 void do_array(int begin, int end) { check_obj(T_OBJECT); }
626 };
627
628
629 void JavaCallArguments::verify(const methodHandle& method, BasicType return_type) {
630 guarantee(method->size_of_parameters() == size_of_parameters(), "wrong no. of arguments pushed");
631
632 // Treat T_OBJECT and T_ARRAY as the same
633 if (return_type == T_ARRAY) return_type = T_OBJECT;
634
635 // Check that oop information is correct
636 Symbol* signature = method->signature();
637
638 SignatureChekker sc(signature,
639 return_type,
640 method->is_static(),
641 _value_state,
642 _value);
643 sc.iterate_parameters();
644 sc.check_doing_return(true);
645 sc.iterate_returntype();
646 }