51 #include "oops/method.inline.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/methodHandles.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "runtime/atomic.hpp"
60 #include "runtime/continuation.hpp"
61 #include "runtime/deoptimization.hpp"
62 #include "runtime/fieldDescriptor.inline.hpp"
63 #include "runtime/frame.inline.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/icache.hpp"
66 #include "runtime/interfaceSupport.inline.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/osThread.hpp"
71 #include "runtime/sharedRuntime.hpp"
72 #include "runtime/stackWatermarkSet.hpp"
73 #include "runtime/stubRoutines.hpp"
74 #include "runtime/synchronizer.hpp"
75 #include "runtime/threadCritical.hpp"
76 #include "utilities/align.hpp"
77 #include "utilities/checkedCast.hpp"
78 #include "utilities/copy.hpp"
79 #include "utilities/events.hpp"
80 #ifdef COMPILER2
81 #include "opto/runtime.hpp"
82 #endif
83
84 // Helper class to access current interpreter state
85 class LastFrameAccessor : public StackObj {
86 frame _last_frame;
87 public:
88 LastFrameAccessor(JavaThread* current) {
89 assert(current == Thread::current(), "sanity");
90 _last_frame = current->last_frame();
91 }
92 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
93 Method* method() const { return _last_frame.interpreter_frame_method(); }
94 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
95 int bci() const { return _last_frame.interpreter_frame_bci(); }
106 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
107 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
108 int number_of_dimensions() const { return bcp()[3]; }
109
110 oop callee_receiver(Symbol* signature) {
111 return _last_frame.interpreter_callee_receiver(signature);
112 }
113 BasicObjectLock* monitor_begin() const {
114 return _last_frame.interpreter_frame_monitor_begin();
115 }
116 BasicObjectLock* monitor_end() const {
117 return _last_frame.interpreter_frame_monitor_end();
118 }
119 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
120 return _last_frame.next_monitor_in_interpreter_frame(current);
121 }
122
123 frame& get_frame() { return _last_frame; }
124 };
125
126 //------------------------------------------------------------------------------------------------------------------------
127 // State accessors
128
129 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
130 LastFrameAccessor last_frame(current);
131 last_frame.set_bcp(bcp);
132 if (ProfileInterpreter) {
133 // ProfileTraps uses MDOs independently of ProfileInterpreter.
134 // That is why we must check both ProfileInterpreter and mdo != nullptr.
135 MethodData* mdo = last_frame.method()->method_data();
136 if (mdo != nullptr) {
137 NEEDS_CLEANUP;
138 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
139 }
140 }
141 }
142
143 //------------------------------------------------------------------------------------------------------------------------
144 // Constants
145
146
147 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
148 // access constant pool
149 LastFrameAccessor last_frame(current);
150 ConstantPool* pool = last_frame.method()->constants();
151 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
152 constantTag tag = pool->tag_at(cp_index);
153
154 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
155 Klass* klass = pool->klass_at(cp_index, CHECK);
156 oop java_class = klass->java_mirror();
157 current->set_vm_result(java_class);
158 JRT_END
159
160 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
161 assert(bytecode == Bytecodes::_ldc ||
162 bytecode == Bytecodes::_ldc_w ||
163 bytecode == Bytecodes::_ldc2_w ||
164 bytecode == Bytecodes::_fast_aldc ||
165 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
166 ResourceMark rm(current);
167 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
168 bytecode == Bytecodes::_fast_aldc_w);
169 LastFrameAccessor last_frame(current);
170 methodHandle m (current, last_frame.method());
171 Bytecode_loadconstant ldc(m, last_frame.bci());
172
173 // Double-check the size. (Condy can have any type.)
174 BasicType type = ldc.result_type();
175 switch (type2size[type]) {
176 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
177 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
178 default: ShouldNotReachHere();
179 }
180
196 assert(roop == coop, "expected result for assembly code");
197 }
198 }
199 #endif
200 current->set_vm_result(result);
201 if (!is_fast_aldc) {
202 // Tell the interpreter how to unbox the primitive.
203 guarantee(java_lang_boxing_object::is_instance(result, type), "");
204 int offset = java_lang_boxing_object::value_offset(type);
205 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
206 | (offset & ConstantPoolCache::field_index_mask));
207 current->set_vm_result_2((Metadata*)flags);
208 }
209 }
210 JRT_END
211
212
213 //------------------------------------------------------------------------------------------------------------------------
214 // Allocation
215
216 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
217 Klass* k = pool->klass_at(index, CHECK);
218 InstanceKlass* klass = InstanceKlass::cast(k);
219
220 // Make sure we are not instantiating an abstract klass
221 klass->check_valid_for_instantiation(true, CHECK);
222
223 // Make sure klass is initialized
224 klass->initialize(CHECK);
225
226 oop obj = klass->allocate_instance(CHECK);
227 current->set_vm_result(obj);
228 JRT_END
229
230
231 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
232 oop obj = oopFactory::new_typeArray(type, size, CHECK);
233 current->set_vm_result(obj);
234 JRT_END
235
236
237 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
238 Klass* klass = pool->klass_at(index, CHECK);
239 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
240 current->set_vm_result(obj);
241 JRT_END
242
243
244 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
245 // We may want to pass in more arguments - could make this slightly faster
246 LastFrameAccessor last_frame(current);
247 ConstantPool* constants = last_frame.method()->constants();
248 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
249 Klass* klass = constants->klass_at(i, CHECK);
250 int nof_dims = last_frame.number_of_dimensions();
251 assert(klass->is_klass(), "not a class");
252 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
253
254 // We must create an array of jints to pass to multi_allocate.
255 ResourceMark rm(current);
256 const int small_dims = 10;
257 jint dim_array[small_dims];
258 jint *dims = &dim_array[0];
259 if (nof_dims > small_dims) {
260 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
261 }
262 for (int index = 0; index < nof_dims; index++) {
263 // offset from first_size_address is addressed as local[index]
264 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
265 dims[index] = first_size_address[n];
266 }
267 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
268 current->set_vm_result(obj);
269 JRT_END
270
271
272 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
273 assert(oopDesc::is_oop(obj), "must be a valid oop");
274 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
275 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
276 JRT_END
277
278
279 // Quicken instance-of and check-cast bytecodes
280 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
281 // Force resolving; quicken the bytecode
282 LastFrameAccessor last_frame(current);
283 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
284 ConstantPool* cpool = last_frame.method()->constants();
285 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
286 // program we might have seen an unquick'd bytecode in the interpreter but have another
287 // thread quicken the bytecode before we get here.
288 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
289 Klass* klass = cpool->klass_at(which, CHECK);
290 current->set_vm_result_2(klass);
291 JRT_END
292
293
294 //------------------------------------------------------------------------------------------------------------------------
295 // Exceptions
296
297 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
298 const methodHandle& trap_method, int trap_bci) {
299 if (trap_method.not_null()) {
300 MethodData* trap_mdo = trap_method->method_data();
332 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
333 // get klass
334 InstanceKlass* klass = InstanceKlass::cast(k);
335 assert(klass->is_initialized(),
336 "this klass should have been initialized during VM initialization");
337 // create instance - do not call constructor since we may have no
338 // (java) stack space left (should assert constructor is empty)
339 Handle exception;
340 oop exception_oop = klass->allocate_instance(CHECK_(exception));
341 exception = Handle(THREAD, exception_oop);
342 if (StackTraceInThrowable) {
343 java_lang_Throwable::fill_in_stack_trace(exception);
344 }
345 return exception;
346 }
347
348 // Special handling for stack overflow: since we don't have any (java) stack
349 // space left we use the pre-allocated & pre-initialized StackOverflowError
350 // klass to create an stack overflow error instance. We do not call its
351 // constructor for the same reason (it is empty, anyway).
352 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
353 Handle exception = get_preinitialized_exception(
354 vmClasses::StackOverflowError_klass(),
355 CHECK);
356 // Increment counter for hs_err file reporting
357 Atomic::inc(&Exceptions::_stack_overflow_errors);
358 // Remove the ScopedValue bindings in case we got a StackOverflowError
359 // while we were trying to manipulate ScopedValue bindings.
360 current->clear_scopedValueBindings();
361 THROW_HANDLE(exception);
362 JRT_END
363
364 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
365 Handle exception = get_preinitialized_exception(
366 vmClasses::StackOverflowError_klass(),
367 CHECK);
368 java_lang_Throwable::set_message(exception(),
369 Universe::delayed_stack_overflow_error_message());
370 // Increment counter for hs_err file reporting
371 Atomic::inc(&Exceptions::_stack_overflow_errors);
372 // Remove the ScopedValue bindings in case we got a StackOverflowError
373 // while we were trying to manipulate ScopedValue bindings.
374 current->clear_scopedValueBindings();
375 THROW_HANDLE(exception);
376 JRT_END
377
378 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
379 // lookup exception klass
380 TempNewSymbol s = SymbolTable::new_symbol(name);
381 if (ProfileTraps) {
382 if (s == vmSymbols::java_lang_ArithmeticException()) {
383 note_trap(current, Deoptimization::Reason_div0_check);
384 } else if (s == vmSymbols::java_lang_NullPointerException()) {
385 note_trap(current, Deoptimization::Reason_null_check);
386 }
387 }
388 // create exception
389 Handle exception = Exceptions::new_exception(current, s, message);
390 current->set_vm_result(exception());
391 JRT_END
392
393
394 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
395 // Produce the error message first because note_trap can safepoint
396 ResourceMark rm(current);
397 const char* klass_name = obj->klass()->external_name();
398 // lookup exception klass
399 TempNewSymbol s = SymbolTable::new_symbol(name);
400 if (ProfileTraps) {
401 if (s == vmSymbols::java_lang_ArrayStoreException()) {
402 note_trap(current, Deoptimization::Reason_array_check);
403 } else {
404 note_trap(current, Deoptimization::Reason_class_check);
405 }
406 }
407 // create exception, with klass name as detail message
408 Handle exception = Exceptions::new_exception(current, s, klass_name);
409 current->set_vm_result(exception());
410 JRT_END
411
412 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
413 // Produce the error message first because note_trap can safepoint
414 ResourceMark rm(current);
415 stringStream ss;
416 ss.print("Index %d out of bounds for length %d", index, a->length());
417
418 if (ProfileTraps) {
419 note_trap(current, Deoptimization::Reason_range_check);
420 }
421
422 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
423 JRT_END
424
425 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
426 JavaThread* current, oopDesc* obj))
427
428 // Produce the error message first because note_trap can safepoint
429 ResourceMark rm(current);
430 char* message = SharedRuntime::generate_class_cast_message(
431 current, obj->klass());
432
433 if (ProfileTraps) {
434 note_trap(current, Deoptimization::Reason_class_check);
435 }
436
437 // create exception
438 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
439 JRT_END
440
441 // exception_handler_for_exception(...) returns the continuation address,
442 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
443 // The exception oop is returned to make sure it is preserved over GC (it
444 // is only on the stack if the exception was thrown explicitly via athrow).
445 // During this operation, the expression stack contains the values for the
446 // bci where the exception happened. If the exception was propagated back
447 // from a call, the expression stack contains the values for the bci at the
448 // invoke w/o arguments (i.e., as if one were inside the call).
449 // Note that the implementation of this method assumes it's only called when an exception has actually occured
450 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
451 // We get here after we have unwound from a callee throwing an exception
452 // into the interpreter. Any deferred stack processing is notified of
453 // the event via the StackWatermarkSet.
454 StackWatermarkSet::after_unwind(current);
455
456 LastFrameAccessor last_frame(current);
457 Handle h_exception(current, exception);
458 methodHandle h_method (current, last_frame.method());
459 constantPoolHandle h_constants(current, h_method->constants());
460 bool should_repeat;
461 int handler_bci;
462 int current_bci = last_frame.bci();
463
464 if (current->frames_to_pop_failed_realloc() > 0) {
465 // Allocation of scalar replaced object used in this frame
466 // failed. Unconditionally pop the frame.
467 current->dec_frames_to_pop_failed_realloc();
468 current->set_vm_result(h_exception());
469 // If the method is synchronized we already unlocked the monitor
470 // during deoptimization so the interpreter needs to skip it when
569 h_method->set_exception_handler_entered(handler_bci); // profiling
570 #ifndef ZERO
571 set_bcp_and_mdp(handler_pc, current);
572 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
573 #else
574 continuation = (address)(intptr_t) handler_bci;
575 #endif
576 }
577
578 // notify debugger of an exception catch
579 // (this is good for exceptions caught in native methods as well)
580 if (JvmtiExport::can_post_on_exceptions()) {
581 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
582 }
583
584 current->set_vm_result(h_exception());
585 return continuation;
586 JRT_END
587
588
589 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
590 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
591 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
592 JRT_END
593
594
595 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
596 THROW(vmSymbols::java_lang_AbstractMethodError());
597 JRT_END
598
599 // This method is called from the "abstract_entry" of the interpreter.
600 // At that point, the arguments have already been removed from the stack
601 // and therefore we don't have the receiver object at our fingertips. (Though,
602 // on some platforms the receiver still resides in a register...). Thus,
603 // we have no choice but print an error message not containing the receiver
604 // type.
605 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
606 Method* missingMethod))
607 ResourceMark rm(current);
608 assert(missingMethod != nullptr, "sanity");
609 methodHandle m(current, missingMethod);
610 LinkResolver::throw_abstract_method_error(m, THREAD);
611 JRT_END
612
613 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
614 Klass* recvKlass,
615 Method* missingMethod))
616 ResourceMark rm(current);
617 methodHandle mh = methodHandle(current, missingMethod);
618 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
619 JRT_END
620
621
622 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
623 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
624 JRT_END
625
626 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
627 Klass* recvKlass,
628 Klass* interfaceKlass))
629 ResourceMark rm(current);
630 char buf[1000];
631 buf[0] = '\0';
632 jio_snprintf(buf, sizeof(buf),
633 "Class %s does not implement the requested interface %s",
634 recvKlass ? recvKlass->external_name() : "nullptr",
635 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
636 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
637 JRT_END
638
639 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
640 THROW(vmSymbols::java_lang_NullPointerException());
641 JRT_END
642
643 //------------------------------------------------------------------------------------------------------------------------
644 // Fields
645 //
646
647 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
648 LastFrameAccessor last_frame(current);
649 constantPoolHandle pool(current, last_frame.method()->constants());
650 methodHandle m(current, last_frame.method());
651
652 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
653 }
654
655 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
656 methodHandle& m,
657 constantPoolHandle& pool,
658 bool initialize_holder, TRAPS) {
659 fieldDescriptor info;
660 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
661 bytecode == Bytecodes::_putstatic);
662 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
663
664 {
665 JvmtiHideSingleStepping jhss(THREAD);
666 LinkResolver::resolve_field_access(info, pool, field_index,
684 // an IllegalAccessError if the instruction is not in an instance
685 // initializer method <init>. If resolution were not inhibited, a putfield
686 // in an initializer method could be resolved in the initializer. Subsequent
687 // putfield instructions to the same field would then use cached information.
688 // As a result, those instructions would not pass through the VM. That is,
689 // checks in resolve_field_access() would not be executed for those instructions
690 // and the required IllegalAccessError would not be thrown.
691 //
692 // Also, we need to delay resolving getstatic and putstatic instructions until the
693 // class is initialized. This is required so that access to the static
694 // field will call the initialization function every time until the class
695 // is completely initialized ala. in 2.17.5 in JVM Specification.
696 InstanceKlass* klass = info.field_holder();
697 bool uninitialized_static = is_static && !klass->is_initialized();
698 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
699 info.has_initialized_final_update();
700 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
701
702 Bytecodes::Code get_code = (Bytecodes::Code)0;
703 Bytecodes::Code put_code = (Bytecodes::Code)0;
704 if (!uninitialized_static) {
705 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
706 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
707 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
708 }
709 }
710
711 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
712 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
713 entry->fill_in(info.field_holder(), info.offset(),
714 checked_cast<u2>(info.index()), checked_cast<u1>(state),
715 static_cast<u1>(get_code), static_cast<u1>(put_code));
716 }
717
718
719 //------------------------------------------------------------------------------------------------------------------------
720 // Synchronization
721 //
722 // The interpreter's synchronization code is factored out so that it can
723 // be shared by method invocation and synchronized blocks.
724 //%note synchronization_3
725
726 //%note monitor_1
727 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
728 assert(LockingMode != LM_LIGHTWEIGHT, "Should call monitorenter_obj() when using the new lightweight locking");
729 #ifdef ASSERT
730 current->last_frame().interpreter_frame_verify_monitor(elem);
731 #endif
732 Handle h_obj(current, elem->obj());
733 assert(Universe::heap()->is_in_or_null(h_obj()),
734 "must be null or an object");
735 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
736 assert(Universe::heap()->is_in_or_null(elem->obj()),
737 "must be null or an object");
738 #ifdef ASSERT
739 current->last_frame().interpreter_frame_verify_monitor(elem);
740 #endif
741 JRT_END
742
743 // NOTE: We provide a separate implementation for the new lightweight locking to workaround a limitation
744 // of registers in x86_32. This entry point accepts an oop instead of a BasicObjectLock*.
745 // The problem is that we would need to preserve the register that holds the BasicObjectLock,
746 // but we are using that register to hold the thread. We don't have enough registers to
747 // also keep the BasicObjectLock, but we don't really need it anyway, we only need
748 // the object. See also InterpreterMacroAssembler::lock_object().
749 // As soon as legacy stack-locking goes away we could remove the other monitorenter() entry
750 // point, and only use oop-accepting entries (same for monitorexit() below).
751 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter_obj(JavaThread* current, oopDesc* obj))
752 assert(LockingMode == LM_LIGHTWEIGHT, "Should call monitorenter() when not using the new lightweight locking");
753 Handle h_obj(current, cast_to_oop(obj));
754 assert(Universe::heap()->is_in_or_null(h_obj()),
755 "must be null or an object");
756 ObjectSynchronizer::enter(h_obj, nullptr, current);
757 return;
758 JRT_END
759
760 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
761 oop obj = elem->obj();
762 assert(Universe::heap()->is_in(obj), "must be an object");
763 // The object could become unlocked through a JNI call, which we have no other checks for.
764 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
765 if (obj->is_unlocked()) {
766 if (CheckJNICalls) {
767 fatal("Object has been unlocked by JNI");
768 }
769 return;
770 }
771 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
772 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
773 // again at method exit or in the case of an exception.
774 elem->set_obj(nullptr);
775 JRT_END
776
777
778 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
779 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
780 JRT_END
781
782
783 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
784 // Returns an illegal exception to install into the current thread. The
785 // pending_exception flag is cleared so normal exception handling does not
786 // trigger. Any current installed exception will be overwritten. This
787 // method will be called during an exception unwind.
788
789 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
790 Handle exception(current, current->vm_result());
791 assert(exception() != nullptr, "vm result should be set");
792 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
793 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
794 current->set_vm_result(exception());
795 JRT_END
796
797
798 //------------------------------------------------------------------------------------------------------------------------
799 // Invokes
800
801 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
802 return method->orig_bytecode_at(method->bci_from(bcp));
803 JRT_END
804
805 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
806 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
807 JRT_END
808
809 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
810 JvmtiExport::post_raw_breakpoint(current, method, bcp);
811 JRT_END
812
813 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
814 LastFrameAccessor last_frame(current);
815 // extract receiver from the outgoing argument list if necessary
816 Handle receiver(current, nullptr);
817 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
818 bytecode == Bytecodes::_invokespecial) {
819 ResourceMark rm(current);
820 methodHandle m (current, last_frame.method());
821 Bytecode_invoke call(m, last_frame.bci());
822 Symbol* signature = call.signature();
823 receiver = Handle(current, last_frame.callee_receiver(signature));
824
825 assert(Universe::heap()->is_in_or_null(receiver()),
826 "sanity check");
827 assert(receiver.is_null() ||
828 !Universe::heap()->is_in(receiver->klass()),
829 "sanity check");
830 }
831
832 // resolve method
911 cache->set_itable_call(
912 bytecode,
913 method_index,
914 info.resolved_klass(),
915 resolved_method,
916 info.itable_index());
917 break;
918 default: ShouldNotReachHere();
919 }
920 }
921
922 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
923 constantPoolHandle& pool, TRAPS) {
924 LinkInfo link_info(pool, method_index, bytecode, CHECK);
925
926 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
927 CallInfo call_info;
928 switch (bytecode) {
929 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
930 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
931 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
932
933 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
934 }
935 methodHandle resolved_method(THREAD, call_info.resolved_method());
936 guarantee(resolved_method->method_holder()->is_linked(), "");
937 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
938 } else {
939 // FIXME: why a shared class is not linked yet?
940 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
941 ResourceMark rm;
942 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
943 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
944 resolved_iklass->is_shared() ? "is_shared" : "",
945 resolved_iklass->init_state_name(),
946 resolved_iklass->external_name());
947 }
948 }
949
950 // First time execution: Resolve symbols, create a permanent MethodType object.
951 void InterpreterRuntime::resolve_invokehandle(JavaThread* current) {
952 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
953 LastFrameAccessor last_frame(current);
954
955 // resolve method
956 CallInfo info;
957 constantPoolHandle pool(current, last_frame.method()->constants());
958 int method_index = last_frame.get_index_u2(bytecode);
959 {
960 JvmtiHideSingleStepping jhss(current);
961 JavaThread* THREAD = current; // For exception macros.
962 LinkResolver::resolve_invoke(info, Handle(), pool,
963 method_index, bytecode,
964 CHECK);
965 } // end JvmtiHideSingleStepping
966
967 pool->cache()->set_method_handle(method_index, info);
968 }
969
970 // First time execution: Resolve symbols, create a permanent CallSite object.
971 void InterpreterRuntime::resolve_invokedynamic(JavaThread* current) {
972 LastFrameAccessor last_frame(current);
973 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
974
975 // resolve method
976 CallInfo info;
977 constantPoolHandle pool(current, last_frame.method()->constants());
978 int index = last_frame.get_index_u4(bytecode);
979 {
980 JvmtiHideSingleStepping jhss(current);
981 JavaThread* THREAD = current; // For exception macros.
982 LinkResolver::resolve_invoke(info, Handle(), pool,
983 index, bytecode, CHECK);
984 } // end JvmtiHideSingleStepping
985
986 pool->cache()->set_dynamic_call(info, index);
987 }
988
989 // This function is the interface to the assembly code. It returns the resolved
990 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
991 // This function will check for redefinition!
992 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
993 switch (bytecode) {
994 case Bytecodes::_getstatic:
995 case Bytecodes::_putstatic:
996 case Bytecodes::_getfield:
997 case Bytecodes::_putfield:
998 resolve_get_put(current, bytecode);
999 break;
1000 case Bytecodes::_invokevirtual:
1001 case Bytecodes::_invokespecial:
1002 case Bytecodes::_invokestatic:
1003 case Bytecodes::_invokeinterface:
1004 resolve_invoke(current, bytecode);
1005 break;
1006 case Bytecodes::_invokehandle:
1007 resolve_invokehandle(current);
1008 break;
1009 case Bytecodes::_invokedynamic:
1010 resolve_invokedynamic(current);
1011 break;
1012 default:
1013 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1014 break;
1015 }
1016 }
1017 JRT_END
1018
1019 //------------------------------------------------------------------------------------------------------------------------
1020 // Miscellaneous
1021
1022
1023 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1024 // Enable WXWrite: the function is called directly by interpreter.
1025 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1026
1027 // frequency_counter_overflow_inner can throw async exception.
1028 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1029 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1030 if (branch_bcp != nullptr && nm != nullptr) {
1031 // This was a successful request for an OSR nmethod. Because
1047 }
1048 if (nm != nullptr && current->is_interp_only_mode()) {
1049 // Normally we never get an nm if is_interp_only_mode() is true, because
1050 // policy()->event has a check for this and won't compile the method when
1051 // true. However, it's possible for is_interp_only_mode() to become true
1052 // during the compilation. We don't want to return the nm in that case
1053 // because we want to continue to execute interpreted.
1054 nm = nullptr;
1055 }
1056 #ifndef PRODUCT
1057 if (TraceOnStackReplacement) {
1058 if (nm != nullptr) {
1059 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1060 nm->print();
1061 }
1062 }
1063 #endif
1064 return nm;
1065 }
1066
1067 JRT_ENTRY(nmethod*,
1068 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1069 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1070 // flag, in case this method triggers classloading which will call into Java.
1071 UnlockFlagSaver fs(current);
1072
1073 LastFrameAccessor last_frame(current);
1074 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1075 methodHandle method(current, last_frame.method());
1076 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1077 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1078
1079 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1080
1081 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1082 if (osr_nm != nullptr && bs_nm != nullptr) {
1083 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1084 osr_nm = nullptr;
1085 }
1086 }
1087 return osr_nm;
1088 JRT_END
1089
1090 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1091 assert(ProfileInterpreter, "must be profiling interpreter");
1092 int bci = method->bci_from(cur_bcp);
1093 MethodData* mdo = method->method_data();
1094 if (mdo == nullptr) return 0;
1095 return mdo->bci_to_di(bci);
1096 JRT_END
1097
1098 #ifdef ASSERT
1099 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1100 assert(ProfileInterpreter, "must be profiling interpreter");
1101
1102 MethodData* mdo = method->method_data();
1103 assert(mdo != nullptr, "must not be null");
1104
1105 int bci = method->bci_from(bcp);
1106
1107 address mdp2 = mdo->bci_to_dp(bci);
1108 if (mdp != mdp2) {
1109 ResourceMark rm;
1110 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1111 int current_di = mdo->dp_to_di(mdp);
1112 int expected_di = mdo->dp_to_di(mdp2);
1113 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1114 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1115 int approx_bci = -1;
1116 if (current_di >= 0) {
1117 approx_bci = mdo->data_at(current_di)->bci();
1118 }
1119 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1120 mdo->print_on(tty);
1121 method->print_codes();
1122 }
1123 assert(mdp == mdp2, "wrong mdp");
1124 JRT_END
1125 #endif // ASSERT
1126
1127 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1128 assert(ProfileInterpreter, "must be profiling interpreter");
1129 ResourceMark rm(current);
1130 LastFrameAccessor last_frame(current);
1131 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1132 MethodData* h_mdo = last_frame.method()->method_data();
1133
1134 // Grab a lock to ensure atomic access to setting the return bci and
1135 // the displacement. This can block and GC, invalidating all naked oops.
1136 MutexLocker ml(RetData_lock);
1137
1138 // ProfileData is essentially a wrapper around a derived oop, so we
1139 // need to take the lock before making any ProfileData structures.
1140 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1141 guarantee(data != nullptr, "profile data must be valid");
1142 RetData* rdata = data->as_RetData();
1143 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1144 last_frame.set_mdp(new_mdp);
1145 JRT_END
1146
1147 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1148 return Method::build_method_counters(current, m);
1149 JRT_END
1150
1151
1152 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1153 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1154 // stack traversal automatically takes care of preserving arguments for invoke, so
1155 // this is no longer needed.
1156
1157 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1158 // if this is called during a safepoint
1159
1160 if (JvmtiExport::should_post_single_step()) {
1161 // This function is called by the interpreter when single stepping. Such single
1162 // stepping could unwind a frame. Then, it is important that we process any frames
1163 // that we might return into.
1164 StackWatermarkSet::before_unwind(current);
1165
1166 // We are called during regular safepoints and when the VM is
1167 // single stepping. If any thread is marked for single stepping,
1168 // then we may have JVMTI work to do.
1169 LastFrameAccessor last_frame(current);
1170 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1171 }
1172 JRT_END
1173
1174 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1175 assert(current == JavaThread::current(), "pre-condition");
1176 // This function is called by the interpreter when the return poll found a reason
1177 // to call the VM. The reason could be that we are returning into a not yet safe
1178 // to access frame. We handle that below.
1179 // Note that this path does not check for single stepping, because we do not want
1180 // to single step when unwinding frames for an exception being thrown. Instead,
1181 // such single stepping code will use the safepoint table, which will use the
1182 // InterpreterRuntime::at_safepoint callback.
1183 StackWatermarkSet::before_unwind(current);
1184 JRT_END
1185
1186 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1187 ResolvedFieldEntry *entry))
1188
1189 // check the access_flags for the field in the klass
1190
1191 InstanceKlass* ik = entry->field_holder();
1192 int index = entry->field_index();
1193 if (!ik->field_status(index).is_access_watched()) return;
1194
1195 bool is_static = (obj == nullptr);
1196 HandleMark hm(current);
1197
1198 Handle h_obj;
1199 if (!is_static) {
1200 // non-static field accessors have an object, but we need a handle
1201 h_obj = Handle(current, obj);
1202 }
1203 InstanceKlass* field_holder = entry->field_holder(); // HERE
1204 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1205 LastFrameAccessor last_frame(current);
1206 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1207 JRT_END
1208
1209 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1210 ResolvedFieldEntry *entry, jvalue *value))
1211
1212 InstanceKlass* ik = entry->field_holder();
1213
1214 // check the access_flags for the field in the klass
1215 int index = entry->field_index();
1216 // bail out if field modifications are not watched
1217 if (!ik->field_status(index).is_modification_watched()) return;
1218
1219 char sig_type = '\0';
1220
1221 switch((TosState)entry->tos_state()) {
1222 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1223 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1224 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1225 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1226 case itos: sig_type = JVM_SIGNATURE_INT; break;
1227 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1228 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1229 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1230 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1245 // We assume that the two halves of longs/doubles are stored in interpreter
1246 // stack slots in platform-endian order.
1247 jlong_accessor u;
1248 jint* newval = (jint*)value;
1249 u.words[0] = newval[0];
1250 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1251 fvalue.j = u.long_value;
1252 #endif // _LP64
1253
1254 Handle h_obj;
1255 if (!is_static) {
1256 // non-static field accessors have an object, but we need a handle
1257 h_obj = Handle(current, obj);
1258 }
1259
1260 LastFrameAccessor last_frame(current);
1261 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1262 fid, sig_type, &fvalue);
1263 JRT_END
1264
1265 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1266 LastFrameAccessor last_frame(current);
1267 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1268 JRT_END
1269
1270
1271 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1272 // before transitioning to VM, and restore it after transitioning back
1273 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1274 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1275 LastFrameAccessor last_frame(current);
1276 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1277 JRT_END
1278
1279 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1280 {
1281 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1282 }
1283 JRT_END
1284
1285
1286 // Implementation of SignatureHandlerLibrary
1287
1288 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1289 // Dummy definition (else normalization method is defined in CPU
1290 // dependent code)
1291 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1292 return fingerprint;
1293 }
1294 #endif
1295
1296 address SignatureHandlerLibrary::set_handler_blob() {
1297 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1298 if (handler_blob == nullptr) {
1299 return nullptr;
1457 } else {
1458 if (PrintSignatureHandlers) {
1459 tty->cr();
1460 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1461 _handlers->length(),
1462 fingerprint,
1463 p2i(_handlers->at(handler_index)),
1464 p2i(handler));
1465 }
1466 }
1467 }
1468
1469
1470 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1471 address SignatureHandlerLibrary::_handler = nullptr;
1472 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1473 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1474 address SignatureHandlerLibrary::_buffer = nullptr;
1475
1476
1477 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1478 methodHandle m(current, method);
1479 assert(m->is_native(), "sanity check");
1480 // lookup native function entry point if it doesn't exist
1481 if (!m->has_native_function()) {
1482 NativeLookup::lookup(m, CHECK);
1483 }
1484 // make sure signature handler is installed
1485 SignatureHandlerLibrary::add(m);
1486 // The interpreter entry point checks the signature handler first,
1487 // before trying to fetch the native entry point and klass mirror.
1488 // We must set the signature handler last, so that multiple processors
1489 // preparing the same method will be sure to see non-null entry & mirror.
1490 JRT_END
1491
1492 #if defined(IA32) || defined(AMD64) || defined(ARM)
1493 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1494 assert(current == JavaThread::current(), "pre-condition");
1495 if (src_address == dest_address) {
1496 return;
1497 }
1498 ResourceMark rm;
1499 LastFrameAccessor last_frame(current);
1500 assert(last_frame.is_interpreted_frame(), "");
1501 jint bci = last_frame.bci();
1502 methodHandle mh(current, last_frame.method());
1503 Bytecode_invoke invoke(mh, bci);
1504 ArgumentSizeComputer asc(invoke.signature());
1505 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1506 Copy::conjoint_jbytes(src_address, dest_address,
1507 size_of_arguments * Interpreter::stackElementSize);
1508 JRT_END
1509 #endif
1510
1511 #if INCLUDE_JVMTI
1512 // This is a support of the JVMTI PopFrame interface.
1513 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1514 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1515 // The member_name argument is a saved reference (in local#0) to the member_name.
1516 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1517 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1518 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1519 Method* method, address bcp))
1520 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1521 if (code != Bytecodes::_invokestatic) {
1522 return;
1523 }
1524 ConstantPool* cpool = method->constants();
1525 int cp_index = Bytes::get_native_u2(bcp + 1);
1526 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1527 Symbol* mname = cpool->name_ref_at(cp_index, code);
1528
1529 if (MethodHandles::has_member_arg(cname, mname)) {
1530 oop member_name_oop = cast_to_oop(member_name);
1531 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1532 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1533 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1534 }
1535 current->set_vm_result(member_name_oop);
1536 } else {
1537 current->set_vm_result(nullptr);
1538 }
1539 JRT_END
1540 #endif // INCLUDE_JVMTI
1541
1542 #ifndef PRODUCT
1543 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1544 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1545 // The generated code still uses call_VM because that will set up the frame pointer for
1546 // bcp and method.
1547 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1548 assert(current == JavaThread::current(), "pre-condition");
1549 LastFrameAccessor last_frame(current);
1550 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1551 methodHandle mh(current, last_frame.method());
1552 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1553 return preserve_this_value;
1554 JRT_END
1555 #endif // !PRODUCT
|
51 #include "oops/method.inline.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/methodHandles.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "runtime/atomic.hpp"
60 #include "runtime/continuation.hpp"
61 #include "runtime/deoptimization.hpp"
62 #include "runtime/fieldDescriptor.inline.hpp"
63 #include "runtime/frame.inline.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/icache.hpp"
66 #include "runtime/interfaceSupport.inline.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/osThread.hpp"
71 #include "runtime/perfData.inline.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/stackWatermarkSet.hpp"
74 #include "runtime/stubRoutines.hpp"
75 #include "runtime/synchronizer.hpp"
76 #include "runtime/threadCritical.hpp"
77 #include "services/management.hpp"
78 #include "utilities/align.hpp"
79 #include "utilities/checkedCast.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/events.hpp"
82 #ifdef COMPILER2
83 #include "opto/runtime.hpp"
84 #endif
85
86 // Helper class to access current interpreter state
87 class LastFrameAccessor : public StackObj {
88 frame _last_frame;
89 public:
90 LastFrameAccessor(JavaThread* current) {
91 assert(current == Thread::current(), "sanity");
92 _last_frame = current->last_frame();
93 }
94 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
95 Method* method() const { return _last_frame.interpreter_frame_method(); }
96 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
97 int bci() const { return _last_frame.interpreter_frame_bci(); }
108 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
109 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
110 int number_of_dimensions() const { return bcp()[3]; }
111
112 oop callee_receiver(Symbol* signature) {
113 return _last_frame.interpreter_callee_receiver(signature);
114 }
115 BasicObjectLock* monitor_begin() const {
116 return _last_frame.interpreter_frame_monitor_begin();
117 }
118 BasicObjectLock* monitor_end() const {
119 return _last_frame.interpreter_frame_monitor_end();
120 }
121 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
122 return _last_frame.next_monitor_in_interpreter_frame(current);
123 }
124
125 frame& get_frame() { return _last_frame; }
126 };
127
128 static bool is_resolved(JavaThread* current) {
129 LastFrameAccessor last_frame(current);
130 ConstantPool* constants = last_frame.method()->constants();
131 Bytecodes::Code bc = last_frame.code();
132
133 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
134 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
135 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
136 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
137 constantTag tag = constants->tag_at(index);
138 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
139 return constants->tag_at(index).is_klass();
140 } else if (bc == Bytecodes::_invokedynamic) {
141 int index = last_frame.get_index_u4(bc);
142 int indy_index = index;
143 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
144 return indy_entry->is_resolved();
145 } else if (Bytecodes::is_invoke(bc)) {
146 int index = last_frame.get_index_u2(bc);
147 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
148 return rme->is_resolved(bc);
149 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
150 if (bc == Bytecodes::_nofast_getfield) {
151 bc = Bytecodes::_getfield;
152 } else if (bc == Bytecodes::_nofast_putfield) {
153 bc = Bytecodes::_putfield;
154 }
155 int index = last_frame.get_index_u2(bc);
156 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
157 return field_entry->is_resolved(bc);
158 } else if (bc == Bytecodes::_new) {
159 int index = last_frame.get_index_u2(bc);
160 constantTag tag = constants->tag_at(index);
161 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
162 return constants->tag_at(index).is_klass();
163 }
164 return false;
165 }
166
167 static void trace_current_location(JavaThread* current) {
168 LogStreamHandle(Debug, init, interpreter) log;
169 if (current->profile_rt_calls() && log.is_enabled()) {
170 ResourceMark rm(current);
171 LastFrameAccessor last_frame(current);
172 Method* caller = last_frame.method();
173 ConstantPool* constants = caller->constants();
174 Bytecodes::Code bc = last_frame.code();
175 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
176 p2i(current), Bytecodes::name(bc), p2i(caller));
177 if (caller->is_shared()) {
178 log.print(" shared");
179 }
180 if (is_resolved(current)) {
181 log.print(" resolved");
182 }
183 log.print(" ");
184 caller->print_short_name(&log);
185 log.print(" @ %d:", last_frame.bci());
186 int instruction_size = last_frame.bytecode().instruction_size();
187
188 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
189 int index = last_frame.get_index_u2(bc);
190 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
191 if (rme->is_resolved(bc)) {
192 Method* m = rme->method();
193 if (m != nullptr) {
194 log.print(" %s", m->method_holder()->init_state_name());
195 } else {
196 log.print(" null");
197 }
198 }
199 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
200 if (bc == Bytecodes::_nofast_getfield) {
201 bc = Bytecodes::_getfield;
202 } else if (bc == Bytecodes::_nofast_putfield) {
203 bc = Bytecodes::_putfield;
204 }
205 int index = last_frame.get_index_u2(bc);
206 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
207
208 if (field_entry->is_resolved(bc)) {
209 log.print(" %s", field_entry->field_holder()->init_state_name());
210 }
211 } else if (bc == Bytecodes::_new) {
212 int index = last_frame.get_index_u2(bc);
213 constantTag tag = constants->tag_at(index);
214 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
215 if (constants->tag_at(index).is_klass()) {
216 CPKlassSlot kslot = constants->klass_slot_at(index);
217 int resolved_klass_index = kslot.resolved_klass_index();
218 Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
219 log.print(": %s", InstanceKlass::cast(k)->init_state_name());
220 }
221 }
222 log.print(" ");
223 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
224
225 LogStreamHandle(Trace, init, interpreter) log1;
226 if (log1.is_enabled()) {
227 if (bc == Bytecodes::_invokedynamic) {
228 int index = last_frame.get_index_u4(bc);
229 int indy_index = index;
230 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
231 indy_entry->print_on(&log1);
232 } else if (Bytecodes::is_invoke(bc)) {
233 int index = last_frame.get_index_u2(bc);
234 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
235 rme->print_on(&log1);
236 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
237 int index = last_frame.get_index_u2(bc);
238 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
239 field_entry->print_on(&log1);
240 }
241 }
242 }
243 }
244
245 //------------------------------------------------------------------------------------------------------------------------
246 // State accessors
247
248 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
249 LastFrameAccessor last_frame(current);
250 last_frame.set_bcp(bcp);
251 if (ProfileInterpreter) {
252 // ProfileTraps uses MDOs independently of ProfileInterpreter.
253 // That is why we must check both ProfileInterpreter and mdo != nullptr.
254 MethodData* mdo = last_frame.method()->method_data();
255 if (mdo != nullptr) {
256 NEEDS_CLEANUP;
257 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
258 }
259 }
260 }
261
262 //------------------------------------------------------------------------------------------------------------------------
263 // Constants
264
265
266 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
267 // access constant pool
268 LastFrameAccessor last_frame(current);
269 ConstantPool* pool = last_frame.method()->constants();
270 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
271 constantTag tag = pool->tag_at(cp_index);
272
273 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
274 Klass* klass = pool->klass_at(cp_index, CHECK);
275 oop java_class = klass->java_mirror();
276 current->set_vm_result(java_class);
277 JRT_END
278
279 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
280 assert(bytecode == Bytecodes::_ldc ||
281 bytecode == Bytecodes::_ldc_w ||
282 bytecode == Bytecodes::_ldc2_w ||
283 bytecode == Bytecodes::_fast_aldc ||
284 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
285 ResourceMark rm(current);
286 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
287 bytecode == Bytecodes::_fast_aldc_w);
288 LastFrameAccessor last_frame(current);
289 methodHandle m (current, last_frame.method());
290 Bytecode_loadconstant ldc(m, last_frame.bci());
291
292 // Double-check the size. (Condy can have any type.)
293 BasicType type = ldc.result_type();
294 switch (type2size[type]) {
295 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
296 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
297 default: ShouldNotReachHere();
298 }
299
315 assert(roop == coop, "expected result for assembly code");
316 }
317 }
318 #endif
319 current->set_vm_result(result);
320 if (!is_fast_aldc) {
321 // Tell the interpreter how to unbox the primitive.
322 guarantee(java_lang_boxing_object::is_instance(result, type), "");
323 int offset = java_lang_boxing_object::value_offset(type);
324 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
325 | (offset & ConstantPoolCache::field_index_mask));
326 current->set_vm_result_2((Metadata*)flags);
327 }
328 }
329 JRT_END
330
331
332 //------------------------------------------------------------------------------------------------------------------------
333 // Allocation
334
335 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
336 Klass* k = pool->klass_at(index, CHECK);
337 InstanceKlass* klass = InstanceKlass::cast(k);
338
339 // Make sure we are not instantiating an abstract klass
340 klass->check_valid_for_instantiation(true, CHECK);
341
342 // Make sure klass is initialized
343 klass->initialize(CHECK);
344
345 oop obj = klass->allocate_instance(CHECK);
346 current->set_vm_result(obj);
347 JRT_END
348
349
350 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
351 oop obj = oopFactory::new_typeArray(type, size, CHECK);
352 current->set_vm_result(obj);
353 JRT_END
354
355
356 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
357 Klass* klass = pool->klass_at(index, CHECK);
358 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
359 current->set_vm_result(obj);
360 JRT_END
361
362
363 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
364 // We may want to pass in more arguments - could make this slightly faster
365 LastFrameAccessor last_frame(current);
366 ConstantPool* constants = last_frame.method()->constants();
367 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
368 Klass* klass = constants->klass_at(i, CHECK);
369 int nof_dims = last_frame.number_of_dimensions();
370 assert(klass->is_klass(), "not a class");
371 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
372
373 // We must create an array of jints to pass to multi_allocate.
374 ResourceMark rm(current);
375 const int small_dims = 10;
376 jint dim_array[small_dims];
377 jint *dims = &dim_array[0];
378 if (nof_dims > small_dims) {
379 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
380 }
381 for (int index = 0; index < nof_dims; index++) {
382 // offset from first_size_address is addressed as local[index]
383 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
384 dims[index] = first_size_address[n];
385 }
386 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
387 current->set_vm_result(obj);
388 JRT_END
389
390
391 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
392 assert(oopDesc::is_oop(obj), "must be a valid oop");
393 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
394 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
395 JRT_END
396
397
398 // Quicken instance-of and check-cast bytecodes
399 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
400 // Force resolving; quicken the bytecode
401 LastFrameAccessor last_frame(current);
402 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
403 ConstantPool* cpool = last_frame.method()->constants();
404 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
405 // program we might have seen an unquick'd bytecode in the interpreter but have another
406 // thread quicken the bytecode before we get here.
407 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
408 Klass* klass = cpool->klass_at(which, CHECK);
409 current->set_vm_result_2(klass);
410 JRT_END
411
412
413 //------------------------------------------------------------------------------------------------------------------------
414 // Exceptions
415
416 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
417 const methodHandle& trap_method, int trap_bci) {
418 if (trap_method.not_null()) {
419 MethodData* trap_mdo = trap_method->method_data();
451 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
452 // get klass
453 InstanceKlass* klass = InstanceKlass::cast(k);
454 assert(klass->is_initialized(),
455 "this klass should have been initialized during VM initialization");
456 // create instance - do not call constructor since we may have no
457 // (java) stack space left (should assert constructor is empty)
458 Handle exception;
459 oop exception_oop = klass->allocate_instance(CHECK_(exception));
460 exception = Handle(THREAD, exception_oop);
461 if (StackTraceInThrowable) {
462 java_lang_Throwable::fill_in_stack_trace(exception);
463 }
464 return exception;
465 }
466
467 // Special handling for stack overflow: since we don't have any (java) stack
468 // space left we use the pre-allocated & pre-initialized StackOverflowError
469 // klass to create an stack overflow error instance. We do not call its
470 // constructor for the same reason (it is empty, anyway).
471 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
472 InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
473 Handle exception = get_preinitialized_exception(
474 vmClasses::StackOverflowError_klass(),
475 CHECK);
476 // Increment counter for hs_err file reporting
477 Atomic::inc(&Exceptions::_stack_overflow_errors);
478 // Remove the ScopedValue bindings in case we got a StackOverflowError
479 // while we were trying to manipulate ScopedValue bindings.
480 current->clear_scopedValueBindings();
481 THROW_HANDLE(exception);
482 JRT_END
483
484 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
485 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
486 Handle exception = get_preinitialized_exception(
487 vmClasses::StackOverflowError_klass(),
488 CHECK);
489 java_lang_Throwable::set_message(exception(),
490 Universe::delayed_stack_overflow_error_message());
491 // Increment counter for hs_err file reporting
492 Atomic::inc(&Exceptions::_stack_overflow_errors);
493 // Remove the ScopedValue bindings in case we got a StackOverflowError
494 // while we were trying to manipulate ScopedValue bindings.
495 current->clear_scopedValueBindings();
496 THROW_HANDLE(exception);
497 JRT_END
498
499 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
500 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
501 // lookup exception klass
502 TempNewSymbol s = SymbolTable::new_symbol(name);
503 if (ProfileTraps) {
504 if (s == vmSymbols::java_lang_ArithmeticException()) {
505 note_trap(current, Deoptimization::Reason_div0_check);
506 } else if (s == vmSymbols::java_lang_NullPointerException()) {
507 note_trap(current, Deoptimization::Reason_null_check);
508 }
509 }
510 // create exception
511 Handle exception = Exceptions::new_exception(current, s, message);
512 current->set_vm_result(exception());
513 JRT_END
514
515
516 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
517 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
518 // Produce the error message first because note_trap can safepoint
519 ResourceMark rm(current);
520 const char* klass_name = obj->klass()->external_name();
521 // lookup exception klass
522 TempNewSymbol s = SymbolTable::new_symbol(name);
523 if (ProfileTraps) {
524 if (s == vmSymbols::java_lang_ArrayStoreException()) {
525 note_trap(current, Deoptimization::Reason_array_check);
526 } else {
527 note_trap(current, Deoptimization::Reason_class_check);
528 }
529 }
530 // create exception, with klass name as detail message
531 Handle exception = Exceptions::new_exception(current, s, klass_name);
532 current->set_vm_result(exception());
533 JRT_END
534
535 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
536 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
537 // Produce the error message first because note_trap can safepoint
538 ResourceMark rm(current);
539 stringStream ss;
540 ss.print("Index %d out of bounds for length %d", index, a->length());
541
542 if (ProfileTraps) {
543 note_trap(current, Deoptimization::Reason_range_check);
544 }
545
546 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
547 JRT_END
548
549 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
550 InterpreterRuntime::throw_ClassCastException(
551 JavaThread* current, oopDesc* obj))
552
553 // Produce the error message first because note_trap can safepoint
554 ResourceMark rm(current);
555 char* message = SharedRuntime::generate_class_cast_message(
556 current, obj->klass());
557
558 if (ProfileTraps) {
559 note_trap(current, Deoptimization::Reason_class_check);
560 }
561
562 // create exception
563 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
564 JRT_END
565
566 // exception_handler_for_exception(...) returns the continuation address,
567 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
568 // The exception oop is returned to make sure it is preserved over GC (it
569 // is only on the stack if the exception was thrown explicitly via athrow).
570 // During this operation, the expression stack contains the values for the
571 // bci where the exception happened. If the exception was propagated back
572 // from a call, the expression stack contains the values for the bci at the
573 // invoke w/o arguments (i.e., as if one were inside the call).
574 // Note that the implementation of this method assumes it's only called when an exception has actually occured
575 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
576 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
577 // We get here after we have unwound from a callee throwing an exception
578 // into the interpreter. Any deferred stack processing is notified of
579 // the event via the StackWatermarkSet.
580 StackWatermarkSet::after_unwind(current);
581
582 LastFrameAccessor last_frame(current);
583 Handle h_exception(current, exception);
584 methodHandle h_method (current, last_frame.method());
585 constantPoolHandle h_constants(current, h_method->constants());
586 bool should_repeat;
587 int handler_bci;
588 int current_bci = last_frame.bci();
589
590 if (current->frames_to_pop_failed_realloc() > 0) {
591 // Allocation of scalar replaced object used in this frame
592 // failed. Unconditionally pop the frame.
593 current->dec_frames_to_pop_failed_realloc();
594 current->set_vm_result(h_exception());
595 // If the method is synchronized we already unlocked the monitor
596 // during deoptimization so the interpreter needs to skip it when
695 h_method->set_exception_handler_entered(handler_bci); // profiling
696 #ifndef ZERO
697 set_bcp_and_mdp(handler_pc, current);
698 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
699 #else
700 continuation = (address)(intptr_t) handler_bci;
701 #endif
702 }
703
704 // notify debugger of an exception catch
705 // (this is good for exceptions caught in native methods as well)
706 if (JvmtiExport::can_post_on_exceptions()) {
707 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
708 }
709
710 current->set_vm_result(h_exception());
711 return continuation;
712 JRT_END
713
714
715 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
716 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
717 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
718 JRT_END
719
720
721 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
722 THROW(vmSymbols::java_lang_AbstractMethodError());
723 JRT_END
724
725 // This method is called from the "abstract_entry" of the interpreter.
726 // At that point, the arguments have already been removed from the stack
727 // and therefore we don't have the receiver object at our fingertips. (Though,
728 // on some platforms the receiver still resides in a register...). Thus,
729 // we have no choice but print an error message not containing the receiver
730 // type.
731 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
732 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
733 Method* missingMethod))
734 ResourceMark rm(current);
735 assert(missingMethod != nullptr, "sanity");
736 methodHandle m(current, missingMethod);
737 LinkResolver::throw_abstract_method_error(m, THREAD);
738 JRT_END
739
740 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
741 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
742 Klass* recvKlass,
743 Method* missingMethod))
744 ResourceMark rm(current);
745 methodHandle mh = methodHandle(current, missingMethod);
746 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
747 JRT_END
748
749
750 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
751 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
752 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
753 JRT_END
754
755 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
756 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
757 Klass* recvKlass,
758 Klass* interfaceKlass))
759 ResourceMark rm(current);
760 char buf[1000];
761 buf[0] = '\0';
762 jio_snprintf(buf, sizeof(buf),
763 "Class %s does not implement the requested interface %s",
764 recvKlass ? recvKlass->external_name() : "nullptr",
765 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
766 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
767 JRT_END
768
769 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
770 InterpreterRuntime::throw_NullPointerException(JavaThread* current))
771 THROW(vmSymbols::java_lang_NullPointerException());
772 JRT_END
773
774 //------------------------------------------------------------------------------------------------------------------------
775 // Fields
776 //
777
778 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
779 resolve_get_put(current, Bytecodes::_getfield);
780 PROF_END
781
782 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
783 resolve_get_put(current, Bytecodes::_putfield);
784 PROF_END
785
786 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
787 resolve_get_put(current, Bytecodes::_getstatic);
788 PROF_END
789
790 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
791 resolve_get_put(current, Bytecodes::_putstatic);
792 PROF_END
793
794 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
795 LastFrameAccessor last_frame(current);
796 constantPoolHandle pool(current, last_frame.method()->constants());
797 methodHandle m(current, last_frame.method());
798
799 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, true /*initialize_holder*/, current);
800 }
801
802 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
803 methodHandle& m,
804 constantPoolHandle& pool,
805 bool initialize_holder, TRAPS) {
806 fieldDescriptor info;
807 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
808 bytecode == Bytecodes::_putstatic);
809 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
810
811 {
812 JvmtiHideSingleStepping jhss(THREAD);
813 LinkResolver::resolve_field_access(info, pool, field_index,
831 // an IllegalAccessError if the instruction is not in an instance
832 // initializer method <init>. If resolution were not inhibited, a putfield
833 // in an initializer method could be resolved in the initializer. Subsequent
834 // putfield instructions to the same field would then use cached information.
835 // As a result, those instructions would not pass through the VM. That is,
836 // checks in resolve_field_access() would not be executed for those instructions
837 // and the required IllegalAccessError would not be thrown.
838 //
839 // Also, we need to delay resolving getstatic and putstatic instructions until the
840 // class is initialized. This is required so that access to the static
841 // field will call the initialization function every time until the class
842 // is completely initialized ala. in 2.17.5 in JVM Specification.
843 InstanceKlass* klass = info.field_holder();
844 bool uninitialized_static = is_static && !klass->is_initialized();
845 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
846 info.has_initialized_final_update();
847 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
848
849 Bytecodes::Code get_code = (Bytecodes::Code)0;
850 Bytecodes::Code put_code = (Bytecodes::Code)0;
851 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
852 #if !defined(X86) && !defined(AARCH64)
853 guarantee(!uninitialized_static, "fast class init checks missing in interpreter"); // FIXME
854 #endif // !X86 && !AARCH64
855 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
856 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
857 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
858 }
859 }
860
861 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
862 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
863 entry->fill_in(info.field_holder(), info.offset(),
864 checked_cast<u2>(info.index()), checked_cast<u1>(state),
865 static_cast<u1>(get_code), static_cast<u1>(put_code));
866 }
867
868
869 //------------------------------------------------------------------------------------------------------------------------
870 // Synchronization
871 //
872 // The interpreter's synchronization code is factored out so that it can
873 // be shared by method invocation and synchronized blocks.
874 //%note synchronization_3
875
876 //%note monitor_1
877 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
878 assert(LockingMode != LM_LIGHTWEIGHT, "Should call monitorenter_obj() when using the new lightweight locking");
879 #ifdef ASSERT
880 current->last_frame().interpreter_frame_verify_monitor(elem);
881 #endif
882 Handle h_obj(current, elem->obj());
883 assert(Universe::heap()->is_in_or_null(h_obj()),
884 "must be null or an object");
885 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
886 assert(Universe::heap()->is_in_or_null(elem->obj()),
887 "must be null or an object");
888 #ifdef ASSERT
889 current->last_frame().interpreter_frame_verify_monitor(elem);
890 #endif
891 JRT_END
892
893 // NOTE: We provide a separate implementation for the new lightweight locking to workaround a limitation
894 // of registers in x86_32. This entry point accepts an oop instead of a BasicObjectLock*.
895 // The problem is that we would need to preserve the register that holds the BasicObjectLock,
896 // but we are using that register to hold the thread. We don't have enough registers to
897 // also keep the BasicObjectLock, but we don't really need it anyway, we only need
898 // the object. See also InterpreterMacroAssembler::lock_object().
899 // As soon as legacy stack-locking goes away we could remove the other monitorenter() entry
900 // point, and only use oop-accepting entries (same for monitorexit() below).
901 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter_obj, InterpreterRuntime::monitorenter_obj(JavaThread* current, oopDesc* obj))
902 assert(LockingMode == LM_LIGHTWEIGHT, "Should call monitorenter() when not using the new lightweight locking");
903 Handle h_obj(current, cast_to_oop(obj));
904 assert(Universe::heap()->is_in_or_null(h_obj()),
905 "must be null or an object");
906 ObjectSynchronizer::enter(h_obj, nullptr, current);
907 return;
908 JRT_END
909
910 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
911 oop obj = elem->obj();
912 assert(Universe::heap()->is_in(obj), "must be an object");
913 // The object could become unlocked through a JNI call, which we have no other checks for.
914 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
915 if (obj->is_unlocked()) {
916 if (CheckJNICalls) {
917 fatal("Object has been unlocked by JNI");
918 }
919 return;
920 }
921 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
922 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
923 // again at method exit or in the case of an exception.
924 elem->set_obj(nullptr);
925 JRT_END
926
927
928 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
929 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
930 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
931 JRT_END
932
933
934 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
935 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
936 // Returns an illegal exception to install into the current thread. The
937 // pending_exception flag is cleared so normal exception handling does not
938 // trigger. Any current installed exception will be overwritten. This
939 // method will be called during an exception unwind.
940
941 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
942 Handle exception(current, current->vm_result());
943 assert(exception() != nullptr, "vm result should be set");
944 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
945 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
946 current->set_vm_result(exception());
947 JRT_END
948
949
950 //------------------------------------------------------------------------------------------------------------------------
951 // Invokes
952
953 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
954 return method->orig_bytecode_at(method->bci_from(bcp));
955 JRT_END
956
957 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
958 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
959 JRT_END
960
961 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
962 JvmtiExport::post_raw_breakpoint(current, method, bcp);
963 JRT_END
964
965 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
966 resolve_invoke(current, Bytecodes::_invokevirtual);
967 PROF_END
968
969 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
970 resolve_invoke(current, Bytecodes::_invokespecial);
971 PROF_END
972
973 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
974 resolve_invoke(current, Bytecodes::_invokestatic);
975 PROF_END
976
977 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
978 resolve_invoke(current, Bytecodes::_invokeinterface);
979 PROF_END
980
981 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
982 LastFrameAccessor last_frame(current);
983 // extract receiver from the outgoing argument list if necessary
984 Handle receiver(current, nullptr);
985 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
986 bytecode == Bytecodes::_invokespecial) {
987 ResourceMark rm(current);
988 methodHandle m (current, last_frame.method());
989 Bytecode_invoke call(m, last_frame.bci());
990 Symbol* signature = call.signature();
991 receiver = Handle(current, last_frame.callee_receiver(signature));
992
993 assert(Universe::heap()->is_in_or_null(receiver()),
994 "sanity check");
995 assert(receiver.is_null() ||
996 !Universe::heap()->is_in(receiver->klass()),
997 "sanity check");
998 }
999
1000 // resolve method
1079 cache->set_itable_call(
1080 bytecode,
1081 method_index,
1082 info.resolved_klass(),
1083 resolved_method,
1084 info.itable_index());
1085 break;
1086 default: ShouldNotReachHere();
1087 }
1088 }
1089
1090 void InterpreterRuntime::cds_resolve_invoke(Bytecodes::Code bytecode, int method_index,
1091 constantPoolHandle& pool, TRAPS) {
1092 LinkInfo link_info(pool, method_index, bytecode, CHECK);
1093
1094 if (!link_info.resolved_klass()->is_instance_klass() || InstanceKlass::cast(link_info.resolved_klass())->is_linked()) {
1095 CallInfo call_info;
1096 switch (bytecode) {
1097 case Bytecodes::_invokevirtual: LinkResolver::cds_resolve_virtual_call (call_info, link_info, CHECK); break;
1098 case Bytecodes::_invokeinterface: LinkResolver::cds_resolve_interface_call(call_info, link_info, CHECK); break;
1099 case Bytecodes::_invokestatic: LinkResolver::cds_resolve_static_call (call_info, link_info, CHECK); break;
1100 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1101
1102 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1103 }
1104 methodHandle resolved_method(THREAD, call_info.resolved_method());
1105 guarantee(resolved_method->method_holder()->is_linked(), "");
1106 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1107 } else {
1108 // FIXME: why a shared class is not linked yet?
1109 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1110 ResourceMark rm;
1111 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1112 log_info(cds, resolve)("Not resolved: class not linked: %s %s %s",
1113 resolved_iklass->is_shared() ? "is_shared" : "",
1114 resolved_iklass->init_state_name(),
1115 resolved_iklass->external_name());
1116 }
1117 }
1118
1119 // First time execution: Resolve symbols, create a permanent MethodType object.
1120 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1121 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1122 LastFrameAccessor last_frame(current);
1123
1124 // resolve method
1125 CallInfo info;
1126 constantPoolHandle pool(current, last_frame.method()->constants());
1127 int method_index = last_frame.get_index_u2(bytecode);
1128 {
1129 JvmtiHideSingleStepping jhss(current);
1130 JavaThread* THREAD = current; // For exception macros.
1131 LinkResolver::resolve_invoke(info, Handle(), pool,
1132 method_index, bytecode,
1133 CHECK);
1134 } // end JvmtiHideSingleStepping
1135
1136 pool->cache()->set_method_handle(method_index, info);
1137 PROF_END
1138
1139 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1140 constantPoolHandle& pool, TRAPS) {
1141 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1142 CallInfo info;
1143 LinkResolver::resolve_invoke(info, Handle(), pool,
1144 raw_index, bytecode, CHECK);
1145
1146 pool->cache()->set_method_handle(raw_index, info);
1147 }
1148
1149 // First time execution: Resolve symbols, create a permanent CallSite object.
1150 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1151 LastFrameAccessor last_frame(current);
1152 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1153
1154 // resolve method
1155 CallInfo info;
1156 constantPoolHandle pool(current, last_frame.method()->constants());
1157 int index = last_frame.get_index_u4(bytecode);
1158 {
1159 JvmtiHideSingleStepping jhss(current);
1160 JavaThread* THREAD = current; // For exception macros.
1161 LinkResolver::resolve_invoke(info, Handle(), pool,
1162 index, bytecode, CHECK);
1163 } // end JvmtiHideSingleStepping
1164
1165 pool->cache()->set_dynamic_call(info, index);
1166 PROF_END
1167
1168 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1169 constantPoolHandle& pool, TRAPS) {
1170 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1171 CallInfo info;
1172 LinkResolver::resolve_invoke(info, Handle(), pool,
1173 raw_index, bytecode, CHECK);
1174 pool->cache()->set_dynamic_call(info, raw_index);
1175 }
1176
1177 // This function is the interface to the assembly code. It returns the resolved
1178 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1179 // This function will check for redefinition!
1180 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1181 trace_current_location(current);
1182
1183 switch (bytecode) {
1184 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1185 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1186 case Bytecodes::_getfield: resolve_getfield(current); break;
1187 case Bytecodes::_putfield: resolve_putfield(current); break;
1188
1189 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1190 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1191 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1192 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1193 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1194 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1195
1196 default:
1197 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1198 break;
1199 }
1200 }
1201 JRT_END
1202
1203 //------------------------------------------------------------------------------------------------------------------------
1204 // Miscellaneous
1205
1206
1207 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1208 // Enable WXWrite: the function is called directly by interpreter.
1209 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1210
1211 // frequency_counter_overflow_inner can throw async exception.
1212 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1213 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1214 if (branch_bcp != nullptr && nm != nullptr) {
1215 // This was a successful request for an OSR nmethod. Because
1231 }
1232 if (nm != nullptr && current->is_interp_only_mode()) {
1233 // Normally we never get an nm if is_interp_only_mode() is true, because
1234 // policy()->event has a check for this and won't compile the method when
1235 // true. However, it's possible for is_interp_only_mode() to become true
1236 // during the compilation. We don't want to return the nm in that case
1237 // because we want to continue to execute interpreted.
1238 nm = nullptr;
1239 }
1240 #ifndef PRODUCT
1241 if (TraceOnStackReplacement) {
1242 if (nm != nullptr) {
1243 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1244 nm->print();
1245 }
1246 }
1247 #endif
1248 return nm;
1249 }
1250
1251 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1252 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1253 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1254 // flag, in case this method triggers classloading which will call into Java.
1255 UnlockFlagSaver fs(current);
1256
1257 LastFrameAccessor last_frame(current);
1258 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1259 methodHandle method(current, last_frame.method());
1260 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1261 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1262
1263 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1264
1265 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1266 if (osr_nm != nullptr && bs_nm != nullptr) {
1267 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1268 osr_nm = nullptr;
1269 }
1270 }
1271 return osr_nm;
1272 JRT_END
1273
1274 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1275 assert(ProfileInterpreter, "must be profiling interpreter");
1276 int bci = method->bci_from(cur_bcp);
1277 MethodData* mdo = method->method_data();
1278 if (mdo == nullptr) return 0;
1279 return mdo->bci_to_di(bci);
1280 JRT_END
1281
1282 #ifdef ASSERT
1283 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1284 assert(ProfileInterpreter, "must be profiling interpreter");
1285
1286 MethodData* mdo = method->method_data();
1287 assert(mdo != nullptr, "must not be null");
1288
1289 int bci = method->bci_from(bcp);
1290
1291 address mdp2 = mdo->bci_to_dp(bci);
1292 if (mdp != mdp2) {
1293 ResourceMark rm;
1294 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1295 int current_di = mdo->dp_to_di(mdp);
1296 int expected_di = mdo->dp_to_di(mdp2);
1297 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1298 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1299 int approx_bci = -1;
1300 if (current_di >= 0) {
1301 approx_bci = mdo->data_at(current_di)->bci();
1302 }
1303 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1304 mdo->print_on(tty);
1305 method->print_codes();
1306 }
1307 assert(mdp == mdp2, "wrong mdp");
1308 JRT_END
1309 #endif // ASSERT
1310
1311 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1312 assert(ProfileInterpreter, "must be profiling interpreter");
1313 ResourceMark rm(current);
1314 LastFrameAccessor last_frame(current);
1315 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1316 MethodData* h_mdo = last_frame.method()->method_data();
1317
1318 // Grab a lock to ensure atomic access to setting the return bci and
1319 // the displacement. This can block and GC, invalidating all naked oops.
1320 MutexLocker ml(RetData_lock);
1321
1322 // ProfileData is essentially a wrapper around a derived oop, so we
1323 // need to take the lock before making any ProfileData structures.
1324 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1325 guarantee(data != nullptr, "profile data must be valid");
1326 RetData* rdata = data->as_RetData();
1327 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1328 last_frame.set_mdp(new_mdp);
1329 JRT_END
1330
1331 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1332 return Method::build_method_counters(current, m);
1333 JRT_END
1334
1335
1336 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1337 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1338 // stack traversal automatically takes care of preserving arguments for invoke, so
1339 // this is no longer needed.
1340
1341 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1342 // if this is called during a safepoint
1343
1344 if (JvmtiExport::should_post_single_step()) {
1345 // This function is called by the interpreter when single stepping. Such single
1346 // stepping could unwind a frame. Then, it is important that we process any frames
1347 // that we might return into.
1348 StackWatermarkSet::before_unwind(current);
1349
1350 // We are called during regular safepoints and when the VM is
1351 // single stepping. If any thread is marked for single stepping,
1352 // then we may have JVMTI work to do.
1353 LastFrameAccessor last_frame(current);
1354 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1355 }
1356 JRT_END
1357
1358 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1359 assert(current == JavaThread::current(), "pre-condition");
1360 // This function is called by the interpreter when the return poll found a reason
1361 // to call the VM. The reason could be that we are returning into a not yet safe
1362 // to access frame. We handle that below.
1363 // Note that this path does not check for single stepping, because we do not want
1364 // to single step when unwinding frames for an exception being thrown. Instead,
1365 // such single stepping code will use the safepoint table, which will use the
1366 // InterpreterRuntime::at_safepoint callback.
1367 StackWatermarkSet::before_unwind(current);
1368 JRT_END
1369
1370 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_access, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1371 ResolvedFieldEntry *entry))
1372
1373 // check the access_flags for the field in the klass
1374
1375 InstanceKlass* ik = entry->field_holder();
1376 int index = entry->field_index();
1377 if (!ik->field_status(index).is_access_watched()) return;
1378
1379 bool is_static = (obj == nullptr);
1380 HandleMark hm(current);
1381
1382 Handle h_obj;
1383 if (!is_static) {
1384 // non-static field accessors have an object, but we need a handle
1385 h_obj = Handle(current, obj);
1386 }
1387 InstanceKlass* field_holder = entry->field_holder(); // HERE
1388 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1389 LastFrameAccessor last_frame(current);
1390 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1391 JRT_END
1392
1393 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1394 ResolvedFieldEntry *entry, jvalue *value))
1395
1396 InstanceKlass* ik = entry->field_holder();
1397
1398 // check the access_flags for the field in the klass
1399 int index = entry->field_index();
1400 // bail out if field modifications are not watched
1401 if (!ik->field_status(index).is_modification_watched()) return;
1402
1403 char sig_type = '\0';
1404
1405 switch((TosState)entry->tos_state()) {
1406 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1407 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1408 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1409 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1410 case itos: sig_type = JVM_SIGNATURE_INT; break;
1411 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1412 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1413 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1414 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1429 // We assume that the two halves of longs/doubles are stored in interpreter
1430 // stack slots in platform-endian order.
1431 jlong_accessor u;
1432 jint* newval = (jint*)value;
1433 u.words[0] = newval[0];
1434 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1435 fvalue.j = u.long_value;
1436 #endif // _LP64
1437
1438 Handle h_obj;
1439 if (!is_static) {
1440 // non-static field accessors have an object, but we need a handle
1441 h_obj = Handle(current, obj);
1442 }
1443
1444 LastFrameAccessor last_frame(current);
1445 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1446 fid, sig_type, &fvalue);
1447 JRT_END
1448
1449 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1450 LastFrameAccessor last_frame(current);
1451 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1452 JRT_END
1453
1454
1455 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1456 // before transitioning to VM, and restore it after transitioning back
1457 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1458 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1459 LastFrameAccessor last_frame(current);
1460 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1461 JRT_END
1462
1463 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1464 {
1465 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1466 }
1467 JRT_END
1468
1469
1470 // Implementation of SignatureHandlerLibrary
1471
1472 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1473 // Dummy definition (else normalization method is defined in CPU
1474 // dependent code)
1475 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1476 return fingerprint;
1477 }
1478 #endif
1479
1480 address SignatureHandlerLibrary::set_handler_blob() {
1481 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1482 if (handler_blob == nullptr) {
1483 return nullptr;
1641 } else {
1642 if (PrintSignatureHandlers) {
1643 tty->cr();
1644 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1645 _handlers->length(),
1646 fingerprint,
1647 p2i(_handlers->at(handler_index)),
1648 p2i(handler));
1649 }
1650 }
1651 }
1652
1653
1654 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1655 address SignatureHandlerLibrary::_handler = nullptr;
1656 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1657 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1658 address SignatureHandlerLibrary::_buffer = nullptr;
1659
1660
1661 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1662 methodHandle m(current, method);
1663 assert(m->is_native(), "sanity check");
1664 // lookup native function entry point if it doesn't exist
1665 if (!m->has_native_function()) {
1666 NativeLookup::lookup(m, CHECK);
1667 }
1668 // make sure signature handler is installed
1669 SignatureHandlerLibrary::add(m);
1670 // The interpreter entry point checks the signature handler first,
1671 // before trying to fetch the native entry point and klass mirror.
1672 // We must set the signature handler last, so that multiple processors
1673 // preparing the same method will be sure to see non-null entry & mirror.
1674 JRT_END
1675
1676 #if defined(IA32) || defined(AMD64) || defined(ARM)
1677 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1678 assert(current == JavaThread::current(), "pre-condition");
1679 if (src_address == dest_address) {
1680 return;
1681 }
1682 ResourceMark rm;
1683 LastFrameAccessor last_frame(current);
1684 assert(last_frame.is_interpreted_frame(), "");
1685 jint bci = last_frame.bci();
1686 methodHandle mh(current, last_frame.method());
1687 Bytecode_invoke invoke(mh, bci);
1688 ArgumentSizeComputer asc(invoke.signature());
1689 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1690 Copy::conjoint_jbytes(src_address, dest_address,
1691 size_of_arguments * Interpreter::stackElementSize);
1692 JRT_END
1693 #endif
1694
1695 #if INCLUDE_JVMTI
1696 // This is a support of the JVMTI PopFrame interface.
1697 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1698 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1699 // The member_name argument is a saved reference (in local#0) to the member_name.
1700 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1701 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1702 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1703 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1704 Method* method, address bcp))
1705 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1706 if (code != Bytecodes::_invokestatic) {
1707 return;
1708 }
1709 ConstantPool* cpool = method->constants();
1710 int cp_index = Bytes::get_native_u2(bcp + 1);
1711 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1712 Symbol* mname = cpool->name_ref_at(cp_index, code);
1713
1714 if (MethodHandles::has_member_arg(cname, mname)) {
1715 oop member_name_oop = cast_to_oop(member_name);
1716 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1717 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1718 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1719 }
1720 current->set_vm_result(member_name_oop);
1721 } else {
1722 current->set_vm_result(nullptr);
1723 }
1724 JRT_END
1725 #endif // INCLUDE_JVMTI
1726
1727 #ifndef PRODUCT
1728 // This must be a JRT_LEAF function because the interpreter must save registers on x86 to
1729 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1730 // The generated code still uses call_VM because that will set up the frame pointer for
1731 // bcp and method.
1732 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1733 assert(current == JavaThread::current(), "pre-condition");
1734 LastFrameAccessor last_frame(current);
1735 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1736 methodHandle mh(current, last_frame.method());
1737 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2);
1738 return preserve_this_value;
1739 JRT_END
1740 #endif // !PRODUCT
1741
1742 #define DO_COUNTERS(macro) \
1743 macro(InterpreterRuntime, ldc) \
1744 macro(InterpreterRuntime, resolve_ldc) \
1745 macro(InterpreterRuntime, new) \
1746 macro(InterpreterRuntime, newarray) \
1747 macro(InterpreterRuntime, anewarray) \
1748 macro(InterpreterRuntime, multianewarray) \
1749 macro(InterpreterRuntime, register_finalizer) \
1750 macro(InterpreterRuntime, quicken_io_cc) \
1751 macro(InterpreterRuntime, throw_StackOverflowError) \
1752 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1753 macro(InterpreterRuntime, create_exception) \
1754 macro(InterpreterRuntime, create_klass_exception) \
1755 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1756 macro(InterpreterRuntime, throw_ClassCastException) \
1757 macro(InterpreterRuntime, exception_handler_for_exception) \
1758 macro(InterpreterRuntime, throw_pending_exception) \
1759 macro(InterpreterRuntime, throw_AbstractMethodError) \
1760 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1761 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1762 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1763 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1764 macro(InterpreterRuntime, throw_NullPointerException) \
1765 macro(InterpreterRuntime, monitorenter) \
1766 macro(InterpreterRuntime, monitorenter_obj) \
1767 macro(InterpreterRuntime, monitorexit) \
1768 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1769 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1770 macro(InterpreterRuntime, get_original_bytecode_at) \
1771 macro(InterpreterRuntime, set_original_bytecode_at) \
1772 macro(InterpreterRuntime, breakpoint) \
1773 macro(InterpreterRuntime, resolve_getfield) \
1774 macro(InterpreterRuntime, resolve_putfield) \
1775 macro(InterpreterRuntime, resolve_getstatic) \
1776 macro(InterpreterRuntime, resolve_putstatic) \
1777 macro(InterpreterRuntime, resolve_invokevirtual) \
1778 macro(InterpreterRuntime, resolve_invokespecial) \
1779 macro(InterpreterRuntime, resolve_invokestatic) \
1780 macro(InterpreterRuntime, resolve_invokeinterface) \
1781 macro(InterpreterRuntime, resolve_invokehandle) \
1782 macro(InterpreterRuntime, resolve_invokedynamic) \
1783 macro(InterpreterRuntime, frequency_counter_overflow) \
1784 macro(InterpreterRuntime, bcp_to_di) \
1785 macro(InterpreterRuntime, update_mdp_for_ret) \
1786 macro(InterpreterRuntime, build_method_counters) \
1787 macro(InterpreterRuntime, at_safepoint) \
1788 macro(InterpreterRuntime, at_unwind) \
1789 macro(InterpreterRuntime, post_field_access) \
1790 macro(InterpreterRuntime, post_field_modification) \
1791 macro(InterpreterRuntime, post_method_entry) \
1792 macro(InterpreterRuntime, post_method_exit) \
1793 macro(InterpreterRuntime, interpreter_contains) \
1794 macro(InterpreterRuntime, prepare_native_call)
1795
1796 #if INCLUDE_JVMTI
1797 #define DO_JVMTI_COUNTERS(macro) \
1798 macro(InterpreterRuntime, member_name_arg_or_null)
1799 #else
1800 #define DO_JVMTI_COUNTERS(macro)
1801 #endif /* INCLUDE_JVMTI */
1802
1803 #define INIT_COUNTER(sub, name) \
1804 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1805 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1806
1807 void InterpreterRuntime::init_counters() {
1808 if (UsePerfData) {
1809 EXCEPTION_MARK;
1810
1811 DO_COUNTERS(INIT_COUNTER)
1812 DO_JVMTI_COUNTERS(INIT_COUNTER)
1813
1814 if (HAS_PENDING_EXCEPTION) {
1815 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1816 }
1817 }
1818 }
1819 #undef INIT_COUNTER
1820
1821 #define PRINT_COUNTER(sub, name) { \
1822 jlong count = _perf_##sub##_##name##_count->get_value(); \
1823 if (count > 0) { \
1824 st->print_cr(" %-50s = %4ldms (elapsed) %4ldms (thread) (%5ld events)", #sub "::" #name, \
1825 _perf_##sub##_##name##_timer->elapsed_counter_value_ms(), \
1826 _perf_##sub##_##name##_timer->thread_counter_value_ms(), \
1827 count); \
1828 }}
1829
1830 void InterpreterRuntime::print_counters_on(outputStream* st) {
1831 if (UsePerfData && ProfileRuntimeCalls) {
1832 DO_COUNTERS(PRINT_COUNTER)
1833 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1834 } else {
1835 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1836 }
1837 }
1838
1839 #undef PRINT_COUNTER
1840 #undef DO_JVMTI_COUNTERS
1841 #undef DO_COUNTERS
1842
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