49 #include "oops/method.inline.hpp"
50 #include "oops/methodData.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/continuation.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/stackWatermarkSet.hpp"
71 #include "runtime/stubRoutines.hpp"
72 #include "runtime/synchronizer.hpp"
73 #include "utilities/align.hpp"
74 #include "utilities/checkedCast.hpp"
75 #include "utilities/copy.hpp"
76 #include "utilities/events.hpp"
77 #include "utilities/exceptions.hpp"
78 #if INCLUDE_JFR
79 #include "jfr/jfr.inline.hpp"
80 #endif
81
82 // Helper class to access current interpreter state
83 class LastFrameAccessor : public StackObj {
84 frame _last_frame;
85 public:
86 LastFrameAccessor(JavaThread* current) {
87 assert(current == Thread::current(), "sanity");
88 _last_frame = current->last_frame();
89 }
90 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
91 Method* method() const { return _last_frame.interpreter_frame_method(); }
92 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
104 int get_index_u2(Bytecodes::Code bc) const { return bytecode().get_index_u2(bc); }
105 int get_index_u4(Bytecodes::Code bc) const { return bytecode().get_index_u4(bc); }
106 int number_of_dimensions() const { return bcp()[3]; }
107
108 oop callee_receiver(Symbol* signature) {
109 return _last_frame.interpreter_callee_receiver(signature);
110 }
111 BasicObjectLock* monitor_begin() const {
112 return _last_frame.interpreter_frame_monitor_begin();
113 }
114 BasicObjectLock* monitor_end() const {
115 return _last_frame.interpreter_frame_monitor_end();
116 }
117 BasicObjectLock* next_monitor(BasicObjectLock* current) const {
118 return _last_frame.next_monitor_in_interpreter_frame(current);
119 }
120
121 frame& get_frame() { return _last_frame; }
122 };
123
124 //------------------------------------------------------------------------------------------------------------------------
125 // State accessors
126
127 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
128 LastFrameAccessor last_frame(current);
129 last_frame.set_bcp(bcp);
130 if (ProfileInterpreter) {
131 // ProfileTraps uses MDOs independently of ProfileInterpreter.
132 // That is why we must check both ProfileInterpreter and mdo != nullptr.
133 MethodData* mdo = last_frame.method()->method_data();
134 if (mdo != nullptr) {
135 NEEDS_CLEANUP;
136 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
137 }
138 }
139 }
140
141 //------------------------------------------------------------------------------------------------------------------------
142 // Constants
143
144
145 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
146 // access constant pool
147 LastFrameAccessor last_frame(current);
148 ConstantPool* pool = last_frame.method()->constants();
149 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
150 constantTag tag = pool->tag_at(cp_index);
151
152 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
153 Klass* klass = pool->klass_at(cp_index, CHECK);
154 oop java_class = klass->java_mirror();
155 current->set_vm_result_oop(java_class);
156 JRT_END
157
158 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
159 assert(bytecode == Bytecodes::_ldc ||
160 bytecode == Bytecodes::_ldc_w ||
161 bytecode == Bytecodes::_ldc2_w ||
162 bytecode == Bytecodes::_fast_aldc ||
163 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
164 ResourceMark rm(current);
165 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
166 bytecode == Bytecodes::_fast_aldc_w);
167 LastFrameAccessor last_frame(current);
168 methodHandle m (current, last_frame.method());
169 Bytecode_loadconstant ldc(m, last_frame.bci());
170
171 // Double-check the size. (Condy can have any type.)
172 BasicType type = ldc.result_type();
173 switch (type2size[type]) {
174 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
175 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
176 default: ShouldNotReachHere();
177 }
178
194 assert(roop == coop, "expected result for assembly code");
195 }
196 }
197 #endif
198 current->set_vm_result_oop(result);
199 if (!is_fast_aldc) {
200 // Tell the interpreter how to unbox the primitive.
201 guarantee(java_lang_boxing_object::is_instance(result, type), "");
202 int offset = java_lang_boxing_object::value_offset(type);
203 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
204 | (offset & ConstantPoolCache::field_index_mask));
205 current->set_vm_result_metadata((Metadata*)flags);
206 }
207 }
208 JRT_END
209
210
211 //------------------------------------------------------------------------------------------------------------------------
212 // Allocation
213
214 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
215 Klass* k = pool->klass_at(index, CHECK);
216 InstanceKlass* klass = InstanceKlass::cast(k);
217
218 // Make sure we are not instantiating an abstract klass
219 klass->check_valid_for_instantiation(true, CHECK);
220
221 // Make sure klass is initialized
222 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
223
224 oop obj = klass->allocate_instance(CHECK);
225 current->set_vm_result_oop(obj);
226 JRT_END
227
228
229 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
230 oop obj = oopFactory::new_typeArray(type, size, CHECK);
231 current->set_vm_result_oop(obj);
232 JRT_END
233
234
235 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
236 Klass* klass = pool->klass_at(index, CHECK);
237 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
238 current->set_vm_result_oop(obj);
239 JRT_END
240
241
242 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
243 // We may want to pass in more arguments - could make this slightly faster
244 LastFrameAccessor last_frame(current);
245 ConstantPool* constants = last_frame.method()->constants();
246 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
247 Klass* klass = constants->klass_at(i, CHECK);
248 int nof_dims = last_frame.number_of_dimensions();
249 assert(klass->is_klass(), "not a class");
250 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
251
252 // We must create an array of jints to pass to multi_allocate.
253 ResourceMark rm(current);
254 const int small_dims = 10;
255 jint dim_array[small_dims];
256 jint *dims = &dim_array[0];
257 if (nof_dims > small_dims) {
258 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
259 }
260 for (int index = 0; index < nof_dims; index++) {
261 // offset from first_size_address is addressed as local[index]
262 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
263 dims[index] = first_size_address[n];
264 }
265 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
266 current->set_vm_result_oop(obj);
267 JRT_END
268
269
270 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
271 assert(oopDesc::is_oop(obj), "must be a valid oop");
272 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
273 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
274 JRT_END
275
276
277 // Quicken instance-of and check-cast bytecodes
278 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
279 // Force resolving; quicken the bytecode
280 LastFrameAccessor last_frame(current);
281 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
282 ConstantPool* cpool = last_frame.method()->constants();
283 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
284 // program we might have seen an unquick'd bytecode in the interpreter but have another
285 // thread quicken the bytecode before we get here.
286 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
287 Klass* klass = cpool->klass_at(which, CHECK);
288 current->set_vm_result_metadata(klass);
289 JRT_END
290
291
292 //------------------------------------------------------------------------------------------------------------------------
293 // Exceptions
294
295 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
296 const methodHandle& trap_method, int trap_bci) {
297 if (trap_method.not_null()) {
298 MethodData* trap_mdo = trap_method->method_data();
330 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
331 // get klass
332 InstanceKlass* klass = InstanceKlass::cast(k);
333 assert(klass->is_initialized(),
334 "this klass should have been initialized during VM initialization");
335 // create instance - do not call constructor since we may have no
336 // (java) stack space left (should assert constructor is empty)
337 Handle exception;
338 oop exception_oop = klass->allocate_instance(CHECK_(exception));
339 exception = Handle(THREAD, exception_oop);
340 if (StackTraceInThrowable) {
341 java_lang_Throwable::fill_in_stack_trace(exception);
342 }
343 return exception;
344 }
345
346 // Special handling for stack overflow: since we don't have any (java) stack
347 // space left we use the pre-allocated & pre-initialized StackOverflowError
348 // klass to create an stack overflow error instance. We do not call its
349 // constructor for the same reason (it is empty, anyway).
350 JRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
351 Handle exception = get_preinitialized_exception(
352 vmClasses::StackOverflowError_klass(),
353 CHECK);
354 // Increment counter for hs_err file reporting
355 Exceptions::increment_stack_overflow_errors();
356 // Remove the ScopedValue bindings in case we got a StackOverflowError
357 // while we were trying to manipulate ScopedValue bindings.
358 current->clear_scopedValueBindings();
359 THROW_HANDLE(exception);
360 JRT_END
361
362 JRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
363 Handle exception = get_preinitialized_exception(
364 vmClasses::StackOverflowError_klass(),
365 CHECK);
366 java_lang_Throwable::set_message(exception(),
367 Universe::delayed_stack_overflow_error_message());
368 // Increment counter for hs_err file reporting
369 Exceptions::increment_stack_overflow_errors();
370 // Remove the ScopedValue bindings in case we got a StackOverflowError
371 // while we were trying to manipulate ScopedValue bindings.
372 current->clear_scopedValueBindings();
373 THROW_HANDLE(exception);
374 JRT_END
375
376 JRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
377 // lookup exception klass
378 TempNewSymbol s = SymbolTable::new_symbol(name);
379 if (ProfileTraps) {
380 if (s == vmSymbols::java_lang_ArithmeticException()) {
381 note_trap(current, Deoptimization::Reason_div0_check);
382 } else if (s == vmSymbols::java_lang_NullPointerException()) {
383 note_trap(current, Deoptimization::Reason_null_check);
384 }
385 }
386 // create exception
387 Handle exception = Exceptions::new_exception(current, s, message);
388 current->set_vm_result_oop(exception());
389 JRT_END
390
391
392 JRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
393 // Produce the error message first because note_trap can safepoint
394 ResourceMark rm(current);
395 const char* klass_name = obj->klass()->external_name();
396 // lookup exception klass
397 TempNewSymbol s = SymbolTable::new_symbol(name);
398 if (ProfileTraps) {
399 if (s == vmSymbols::java_lang_ArrayStoreException()) {
400 note_trap(current, Deoptimization::Reason_array_check);
401 } else {
402 note_trap(current, Deoptimization::Reason_class_check);
403 }
404 }
405 // create exception, with klass name as detail message
406 Handle exception = Exceptions::new_exception(current, s, klass_name);
407 current->set_vm_result_oop(exception());
408 JRT_END
409
410 JRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
411 // Produce the error message first because note_trap can safepoint
412 ResourceMark rm(current);
413 stringStream ss;
414 ss.print("Index %d out of bounds for length %d", index, a->length());
415
416 if (ProfileTraps) {
417 note_trap(current, Deoptimization::Reason_range_check);
418 }
419
420 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
421 JRT_END
422
423 JRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
424 JavaThread* current, oopDesc* obj))
425
426 // Produce the error message first because note_trap can safepoint
427 ResourceMark rm(current);
428 char* message = SharedRuntime::generate_class_cast_message(
429 current, obj->klass());
430
431 if (ProfileTraps) {
432 note_trap(current, Deoptimization::Reason_class_check);
433 }
434
435 // create exception
436 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
437 JRT_END
438
439 // exception_handler_for_exception(...) returns the continuation address,
440 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
441 // The exception oop is returned to make sure it is preserved over GC (it
442 // is only on the stack if the exception was thrown explicitly via athrow).
443 // During this operation, the expression stack contains the values for the
444 // bci where the exception happened. If the exception was propagated back
445 // from a call, the expression stack contains the values for the bci at the
446 // invoke w/o arguments (i.e., as if one were inside the call).
447 // Note that the implementation of this method assumes it's only called when an exception has actually occured
448 JRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
449 // We get here after we have unwound from a callee throwing an exception
450 // into the interpreter. Any deferred stack processing is notified of
451 // the event via the StackWatermarkSet.
452 StackWatermarkSet::after_unwind(current);
453
454 LastFrameAccessor last_frame(current);
455 Handle h_exception(current, exception);
456 methodHandle h_method (current, last_frame.method());
457 constantPoolHandle h_constants(current, h_method->constants());
458 bool should_repeat;
459 int handler_bci;
460 int current_bci = last_frame.bci();
461
462 if (current->frames_to_pop_failed_realloc() > 0) {
463 // Allocation of scalar replaced object used in this frame
464 // failed. Unconditionally pop the frame.
465 current->dec_frames_to_pop_failed_realloc();
466 current->set_vm_result_oop(h_exception());
467 // If the method is synchronized we already unlocked the monitor
468 // during deoptimization so the interpreter needs to skip it when
571 h_method->set_exception_handler_entered(handler_bci); // profiling
572 #ifndef ZERO
573 set_bcp_and_mdp(handler_pc, current);
574 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
575 #else
576 continuation = (address)(intptr_t) handler_bci;
577 #endif
578 }
579
580 // notify debugger of an exception catch
581 // (this is good for exceptions caught in native methods as well)
582 if (JvmtiExport::can_post_on_exceptions()) {
583 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
584 }
585
586 current->set_vm_result_oop(h_exception());
587 return continuation;
588 JRT_END
589
590
591 JRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* current))
592 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
593 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
594 JRT_END
595
596
597 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
598 THROW(vmSymbols::java_lang_AbstractMethodError());
599 JRT_END
600
601 // This method is called from the "abstract_entry" of the interpreter.
602 // At that point, the arguments have already been removed from the stack
603 // and therefore we don't have the receiver object at our fingertips. (Though,
604 // on some platforms the receiver still resides in a register...). Thus,
605 // we have no choice but print an error message not containing the receiver
606 // type.
607 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
608 Method* missingMethod))
609 ResourceMark rm(current);
610 assert(missingMethod != nullptr, "sanity");
611 methodHandle m(current, missingMethod);
612 LinkResolver::throw_abstract_method_error(m, THREAD);
613 JRT_END
614
615 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
616 Klass* recvKlass,
617 Method* missingMethod))
618 ResourceMark rm(current);
619 methodHandle mh = methodHandle(current, missingMethod);
620 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
621 JRT_END
622
623
624 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
625 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
626 JRT_END
627
628 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
629 Klass* recvKlass,
630 Klass* interfaceKlass))
631 ResourceMark rm(current);
632 char buf[1000];
633 buf[0] = '\0';
634 jio_snprintf(buf, sizeof(buf),
635 "Class %s does not implement the requested interface %s",
636 recvKlass ? recvKlass->external_name() : "nullptr",
637 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
638 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
639 JRT_END
640
641 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
642 THROW(vmSymbols::java_lang_NullPointerException());
643 JRT_END
644
645 //------------------------------------------------------------------------------------------------------------------------
646 // Fields
647 //
648
649 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, TRAPS) {
650 JavaThread* current = THREAD;
651 LastFrameAccessor last_frame(current);
652 constantPoolHandle pool(current, last_frame.method()->constants());
653 methodHandle m(current, last_frame.method());
654
655 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, ClassInitMode::init_preemptable, THREAD);
656 }
657
658 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
659 methodHandle& m,
660 constantPoolHandle& pool,
661 ClassInitMode init_mode, TRAPS) {
662 fieldDescriptor info;
663 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
664 bytecode == Bytecodes::_putstatic);
665 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
666
667 {
668 JvmtiHideSingleStepping jhss(THREAD);
707 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
708 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
709 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
710 }
711 }
712
713 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
714 entry->fill_in(info, 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 #ifdef ASSERT
729 current->last_frame().interpreter_frame_verify_monitor(elem);
730 #endif
731 Handle h_obj(current, elem->obj());
732 assert(Universe::heap()->is_in_or_null(h_obj()),
733 "must be null or an object");
734 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
735 assert(Universe::heap()->is_in_or_null(elem->obj()),
736 "must be null or an object");
737 #ifdef ASSERT
738 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
739 #endif
740 JRT_END
741
742 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
743 oop obj = elem->obj();
744 assert(Universe::heap()->is_in(obj), "must be an object");
745 // The object could become unlocked through a JNI call, which we have no other checks for.
746 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
747 if (obj->is_unlocked()) {
748 if (CheckJNICalls) {
749 fatal("Object has been unlocked by JNI");
750 }
751 return;
752 }
753 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
754 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
755 // again at method exit or in the case of an exception.
756 elem->set_obj(nullptr);
757 JRT_END
758
759
760 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
761 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
762 JRT_END
763
764
765 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
766 // Returns an illegal exception to install into the current thread. The
767 // pending_exception flag is cleared so normal exception handling does not
768 // trigger. Any current installed exception will be overwritten. This
769 // method will be called during an exception unwind.
770
771 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
772 Handle exception(current, current->vm_result_oop());
773 assert(exception() != nullptr, "vm result should be set");
774 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
775 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
776 current->set_vm_result_oop(exception());
777 JRT_END
778
779
780 //------------------------------------------------------------------------------------------------------------------------
781 // Invokes
782
783 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
784 return method->orig_bytecode_at(method->bci_from(bcp));
785 JRT_END
786
787 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
788 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
789 JRT_END
790
791 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
792 JvmtiExport::post_raw_breakpoint(current, method, bcp);
793 JRT_END
794
795 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
796 JavaThread* current = THREAD;
797 LastFrameAccessor last_frame(current);
798 // extract receiver from the outgoing argument list if necessary
799 Handle receiver(current, nullptr);
800 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
801 bytecode == Bytecodes::_invokespecial) {
802 ResourceMark rm(current);
803 methodHandle m (current, last_frame.method());
804 Bytecode_invoke call(m, last_frame.bci());
805 Symbol* signature = call.signature();
806 receiver = Handle(current, last_frame.callee_receiver(signature));
807
808 assert(Universe::heap()->is_in_or_null(receiver()),
809 "sanity check");
810 assert(receiver.is_null() ||
811 !Universe::heap()->is_in(receiver->klass()),
812 "sanity check");
813 }
814
914 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
915
916 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
917 }
918 methodHandle resolved_method(THREAD, call_info.resolved_method());
919 guarantee(resolved_method->method_holder()->is_linked(), "");
920 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
921 } else {
922 // FIXME: why a shared class is not linked yet?
923 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
924 ResourceMark rm;
925 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
926 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
927 resolved_iklass->in_aot_cache() ? "in_aot_cache" : "",
928 resolved_iklass->init_state_name(),
929 resolved_iklass->external_name());
930 }
931 }
932
933 // First time execution: Resolve symbols, create a permanent MethodType object.
934 void InterpreterRuntime::resolve_invokehandle(TRAPS) {
935 JavaThread* current = THREAD;
936 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
937 LastFrameAccessor last_frame(current);
938
939 // resolve method
940 CallInfo info;
941 constantPoolHandle pool(current, last_frame.method()->constants());
942 int method_index = last_frame.get_index_u2(bytecode);
943 {
944 JvmtiHideSingleStepping jhss(current);
945 JavaThread* THREAD = current; // For exception macros.
946 LinkResolver::resolve_invoke(info, Handle(), pool,
947 method_index, bytecode,
948 CHECK);
949 } // end JvmtiHideSingleStepping
950
951 pool->cache()->set_method_handle(method_index, info);
952 }
953
954 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
955 constantPoolHandle& pool, TRAPS) {
956 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
957 CallInfo info;
958 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
959
960 pool->cache()->set_method_handle(raw_index, info);
961 }
962
963 // First time execution: Resolve symbols, create a permanent CallSite object.
964 void InterpreterRuntime::resolve_invokedynamic(TRAPS) {
965 JavaThread* current = THREAD;
966 LastFrameAccessor last_frame(current);
967 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
968
969 // resolve method
970 CallInfo info;
971 constantPoolHandle pool(current, last_frame.method()->constants());
972 int index = last_frame.get_index_u4(bytecode);
973 {
974 JvmtiHideSingleStepping jhss(current);
975 JavaThread* THREAD = current; // For exception macros.
976 LinkResolver::resolve_invoke(info, Handle(), pool,
977 index, bytecode, CHECK);
978 } // end JvmtiHideSingleStepping
979
980 pool->cache()->set_dynamic_call(info, index);
981 }
982
983 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
984 constantPoolHandle& pool, TRAPS) {
985 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
986 CallInfo info;
987 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
988 pool->cache()->set_dynamic_call(info, raw_index);
989 }
990
991 // This function is the interface to the assembly code. It returns the resolved
992 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
993 // This function will check for redefinition!
994 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
995 switch (bytecode) {
996 case Bytecodes::_getstatic:
997 case Bytecodes::_putstatic:
998 case Bytecodes::_getfield:
999 case Bytecodes::_putfield:
1000 resolve_get_put(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1001 break;
1002 case Bytecodes::_invokevirtual:
1003 case Bytecodes::_invokespecial:
1004 case Bytecodes::_invokestatic:
1005 case Bytecodes::_invokeinterface:
1006 resolve_invoke(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1007 break;
1008 case Bytecodes::_invokehandle:
1009 resolve_invokehandle(THREAD);
1010 break;
1011 case Bytecodes::_invokedynamic:
1012 resolve_invokedynamic(THREAD);
1013 break;
1014 default:
1015 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1016 break;
1017 }
1018 }
1019 JRT_END
1020
1021 //------------------------------------------------------------------------------------------------------------------------
1022 // Miscellaneous
1023
1024
1025 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1026 // Enable WXWrite: the function is called directly by interpreter.
1027 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1028
1029 // frequency_counter_overflow_inner can throw async exception.
1030 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1031 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1032 if (branch_bcp != nullptr && nm != nullptr) {
1033 // This was a successful request for an OSR nmethod. Because
1034 // frequency_counter_overflow_inner ends with a safepoint check,
1035 // nm could have been unloaded so look it up again. It's unsafe
1036 // to examine nm directly since it might have been freed and used
1037 // for something else.
1038 LastFrameAccessor last_frame(current);
1039 Method* method = last_frame.method();
1040 int bci = method->bci_from(last_frame.bcp());
1041 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1042 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1043 if (nm != nullptr) {
1044 // in case the transition passed a safepoint we need to barrier this again
1045 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1049 }
1050 if (nm != nullptr && current->is_interp_only_mode()) {
1051 // Normally we never get an nm if is_interp_only_mode() is true, because
1052 // policy()->event has a check for this and won't compile the method when
1053 // true. However, it's possible for is_interp_only_mode() to become true
1054 // during the compilation. We don't want to return the nm in that case
1055 // because we want to continue to execute interpreted.
1056 nm = nullptr;
1057 }
1058 #ifndef PRODUCT
1059 if (TraceOnStackReplacement) {
1060 if (nm != nullptr) {
1061 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1062 nm->print();
1063 }
1064 }
1065 #endif
1066 return nm;
1067 }
1068
1069 JRT_ENTRY(nmethod*,
1070 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1071 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1072 // flag, in case this method triggers classloading which will call into Java.
1073 UnlockFlagSaver fs(current);
1074
1075 LastFrameAccessor last_frame(current);
1076 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1077 methodHandle method(current, last_frame.method());
1078 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1079 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1080
1081 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1082
1083 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1084 if (osr_nm != nullptr) {
1085 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1086 osr_nm = nullptr;
1087 }
1088 }
1089 return osr_nm;
1090 JRT_END
1091
1092 JRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1093 assert(ProfileInterpreter, "must be profiling interpreter");
1094 int bci = method->bci_from(cur_bcp);
1095 MethodData* mdo = method->method_data();
1096 if (mdo == nullptr) return 0;
1097 return mdo->bci_to_di(bci);
1098 JRT_END
1099
1100 #ifdef ASSERT
1101 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1102 assert(ProfileInterpreter, "must be profiling interpreter");
1103
1104 MethodData* mdo = method->method_data();
1105 assert(mdo != nullptr, "must not be null");
1106
1107 int bci = method->bci_from(bcp);
1108
1109 address mdp2 = mdo->bci_to_dp(bci);
1110 if (mdp != mdp2) {
1111 ResourceMark rm;
1112 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1113 int current_di = mdo->dp_to_di(mdp);
1114 int expected_di = mdo->dp_to_di(mdp2);
1115 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1116 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1117 int approx_bci = -1;
1118 if (current_di >= 0) {
1119 approx_bci = mdo->data_at(current_di)->bci();
1120 }
1121 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1122 mdo->print_on(tty);
1123 method->print_codes();
1124 }
1125 assert(mdp == mdp2, "wrong mdp");
1126 JRT_END
1127 #endif // ASSERT
1128
1129 JRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1130 assert(ProfileInterpreter, "must be profiling interpreter");
1131 ResourceMark rm(current);
1132 LastFrameAccessor last_frame(current);
1133 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1134 MethodData* h_mdo = last_frame.method()->method_data();
1135
1136 // Grab a lock to ensure atomic access to setting the return bci and
1137 // the displacement. This can block and GC, invalidating all naked oops.
1138 MutexLocker ml(RetData_lock);
1139
1140 // ProfileData is essentially a wrapper around a derived oop, so we
1141 // need to take the lock before making any ProfileData structures.
1142 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1143 guarantee(data != nullptr, "profile data must be valid");
1144 RetData* rdata = data->as_RetData();
1145 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1146 last_frame.set_mdp(new_mdp);
1147 JRT_END
1148
1149 JRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1150 return Method::build_method_counters(current, m);
1151 JRT_END
1152
1153
1154 JRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* current))
1155 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1156 // stack traversal automatically takes care of preserving arguments for invoke, so
1157 // this is no longer needed.
1158
1159 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1160 // if this is called during a safepoint
1161
1162 if (JvmtiExport::should_post_single_step()) {
1163 // This function is called by the interpreter when single stepping. Such single
1164 // stepping could unwind a frame. Then, it is important that we process any frames
1165 // that we might return into.
1166 StackWatermarkSet::before_unwind(current);
1167
1168 // We are called during regular safepoints and when the VM is
1169 // single stepping. If any thread is marked for single stepping,
1170 // then we may have JVMTI work to do.
1171 LastFrameAccessor last_frame(current);
1172 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1173 }
1174 JRT_END
1175
1176 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1177 assert(current == JavaThread::current(), "pre-condition");
1178 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1179 // This function is called by the interpreter when the return poll found a reason
1180 // to call the VM. The reason could be that we are returning into a not yet safe
1181 // to access frame. We handle that below.
1182 // Note that this path does not check for single stepping, because we do not want
1183 // to single step when unwinding frames for an exception being thrown. Instead,
1184 // such single stepping code will use the safepoint table, which will use the
1185 // InterpreterRuntime::at_safepoint callback.
1186 StackWatermarkSet::before_unwind(current);
1187 JRT_END
1188
1189 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1190 ResolvedFieldEntry* entry))
1191
1192 // check the access_flags for the field in the klass
1193 InstanceKlass* ik = entry->field_holder();
1194 int index = entry->field_index();
1195 if (!ik->field_status(index).is_access_watched()) return;
1196
1197 bool is_static = (obj == nullptr);
1198 HandleMark hm(current);
1199
1200 Handle h_obj;
1201 if (!is_static) {
1202 // non-static field accessors have an object, but we need a handle
1203 h_obj = Handle(current, obj);
1204 }
1205 InstanceKlass* field_holder = entry->field_holder(); // HERE
1206 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1207 LastFrameAccessor last_frame(current);
1208 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1209 JRT_END
1210
1211 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1212 ResolvedFieldEntry* entry, jvalue* value))
1213
1214 // check the access_flags for the field in the klass
1215 InstanceKlass* ik = entry->field_holder();
1216 int index = entry->field_index();
1217 // bail out if field modifications are not watched
1218 if (!ik->field_status(index).is_modification_watched()) return;
1219
1220 char sig_type = '\0';
1221
1222 switch((TosState)entry->tos_state()) {
1223 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1224 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1225 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1226 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1227 case itos: sig_type = JVM_SIGNATURE_INT; break;
1228 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1229 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1230 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1231 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1232 default: ShouldNotReachHere(); return;
1246 // We assume that the two halves of longs/doubles are stored in interpreter
1247 // stack slots in platform-endian order.
1248 jlong_accessor u;
1249 jint* newval = (jint*)value;
1250 u.words[0] = newval[0];
1251 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1252 fvalue.j = u.long_value;
1253 #endif // _LP64
1254
1255 Handle h_obj;
1256 if (!is_static) {
1257 // non-static field accessors have an object, but we need a handle
1258 h_obj = Handle(current, obj);
1259 }
1260
1261 LastFrameAccessor last_frame(current);
1262 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1263 fid, sig_type, &fvalue);
1264 JRT_END
1265
1266 JRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread* current))
1267 LastFrameAccessor last_frame(current);
1268 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1269 JRT_END
1270
1271
1272 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1273 // before transitioning to VM, and restore it after transitioning back
1274 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1275 JRT_BLOCK_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread* current))
1276 LastFrameAccessor last_frame(current);
1277 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1278 JRT_END
1279
1280 JRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1281 {
1282 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1283 }
1284 JRT_END
1285
1286
1287 // Implementation of SignatureHandlerLibrary
1288
1289 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1290 // Dummy definition (else normalization method is defined in CPU
1291 // dependent code)
1292 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1293 return fingerprint;
1294 }
1295 #endif
1296
1297 address SignatureHandlerLibrary::set_handler_blob() {
1298 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1299 if (handler_blob == nullptr) {
1300 return nullptr;
1426 MutexLocker mu(SignatureHandlerLibrary_lock);
1427 if (_handlers != nullptr) {
1428 handler_index = _handlers->find(method->signature_handler());
1429 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1430 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1431 fingerprint_index = _fingerprints->find(fingerprint);
1432 }
1433 }
1434 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1435 handler_index == fingerprint_index, "sanity check");
1436 #endif // ASSERT
1437 }
1438
1439 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1440 address SignatureHandlerLibrary::_handler = nullptr;
1441 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1442 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1443 address SignatureHandlerLibrary::_buffer = nullptr;
1444
1445
1446 JRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1447 methodHandle m(current, method);
1448 assert(m->is_native(), "sanity check");
1449 // lookup native function entry point if it doesn't exist
1450 if (!m->has_native_function()) {
1451 NativeLookup::lookup(m, CHECK);
1452 }
1453 // make sure signature handler is installed
1454 SignatureHandlerLibrary::add(m);
1455 // The interpreter entry point checks the signature handler first,
1456 // before trying to fetch the native entry point and klass mirror.
1457 // We must set the signature handler last, so that multiple processors
1458 // preparing the same method will be sure to see non-null entry & mirror.
1459 JRT_END
1460
1461 #if defined(AMD64) || defined(ARM)
1462 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1463 assert(current == JavaThread::current(), "pre-condition");
1464 if (src_address == dest_address) {
1465 return;
1466 }
1467 ResourceMark rm;
1468 LastFrameAccessor last_frame(current);
1469 assert(last_frame.is_interpreted_frame(), "");
1470 jint bci = last_frame.bci();
1471 methodHandle mh(current, last_frame.method());
1472 Bytecode_invoke invoke(mh, bci);
1473 ArgumentSizeComputer asc(invoke.signature());
1474 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1475 Copy::conjoint_jbytes(src_address, dest_address,
1476 size_of_arguments * Interpreter::stackElementSize);
1477 JRT_END
1478 #endif
1479
1480 #if INCLUDE_JVMTI
1481 // This is a support of the JVMTI PopFrame interface.
1482 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1483 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1484 // The member_name argument is a saved reference (in local#0) to the member_name.
1485 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1486 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1487 JRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1488 Method* method, address bcp))
1489 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1490 if (code != Bytecodes::_invokestatic) {
1491 return;
1492 }
1493 ConstantPool* cpool = method->constants();
1494 int cp_index = Bytes::get_native_u2(bcp + 1);
1495 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1496 Symbol* mname = cpool->name_ref_at(cp_index, code);
1497
1498 if (MethodHandles::has_member_arg(cname, mname)) {
1499 oop member_name_oop = cast_to_oop(member_name);
1500 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1501 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1502 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1503 }
1504 current->set_vm_result_oop(member_name_oop);
1505 } else {
1506 current->set_vm_result_oop(nullptr);
1507 }
1508 JRT_END
1513 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1514 // The generated code still uses call_VM because that will set up the frame pointer for
1515 // bcp and method.
1516 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1517 assert(current == JavaThread::current(), "pre-condition");
1518 LastFrameAccessor last_frame(current);
1519 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1520 methodHandle mh(current, last_frame.method());
1521 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2, tty);
1522 return preserve_this_value;
1523 JRT_END
1524 #endif // !PRODUCT
1525
1526 #ifdef ASSERT
1527 bool InterpreterRuntime::is_preemptable_call(address entry_point) {
1528 return entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter) ||
1529 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache) ||
1530 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::_new);
1531 }
1532 #endif // ASSERT
|
49 #include "oops/method.inline.hpp"
50 #include "oops/methodData.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/continuation.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/perfData.inline.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stackWatermarkSet.hpp"
72 #include "runtime/stubRoutines.hpp"
73 #include "runtime/synchronizer.hpp"
74 #include "services/management.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/checkedCast.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/exceptions.hpp"
80 #if INCLUDE_JFR
81 #include "jfr/jfr.inline.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(); }
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 static bool is_resolved(JavaThread* current) {
127 LastFrameAccessor last_frame(current);
128 ConstantPool* constants = last_frame.method()->constants();
129 Bytecodes::Code bc = last_frame.code();
130
131 if (bc == Bytecodes::_ldc || bc == Bytecodes::_ldc_w || bc == Bytecodes::_ldc2_w ||
132 bc == Bytecodes::_fast_aldc || bc == Bytecodes::_fast_aldc_w) {
133 bool is_wide = (bc != Bytecodes::_ldc) && (bc != Bytecodes::_fast_aldc);
134 int index = (is_wide ? last_frame.get_index_u1(bc) : last_frame.get_index_u2(bc));
135 constantTag tag = constants->tag_at(index);
136 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
137 return constants->tag_at(index).is_klass();
138 } else if (bc == Bytecodes::_invokedynamic) {
139 int index = last_frame.get_index_u4(bc);
140 int indy_index = index;
141 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
142 return indy_entry->is_resolved();
143 } else if (Bytecodes::is_invoke(bc)) {
144 int index = last_frame.get_index_u2(bc);
145 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
146 return rme->is_resolved(bc);
147 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
148 if (bc == Bytecodes::_nofast_getfield) {
149 bc = Bytecodes::_getfield;
150 } else if (bc == Bytecodes::_nofast_putfield) {
151 bc = Bytecodes::_putfield;
152 }
153 int index = last_frame.get_index_u2(bc);
154 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
155 return field_entry->is_resolved(bc);
156 } else if (bc == Bytecodes::_new) {
157 int index = last_frame.get_index_u2(bc);
158 constantTag tag = constants->tag_at(index);
159 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
160 return constants->tag_at(index).is_klass();
161 }
162 return false;
163 }
164
165 static void trace_current_location(JavaThread* current) {
166 LogStreamHandle(Debug, init, interpreter) log;
167 if (current->profile_rt_calls() && log.is_enabled()) {
168 ResourceMark rm(current);
169 LastFrameAccessor last_frame(current);
170 Method* caller = last_frame.method();
171 ConstantPool* constants = caller->constants();
172 Bytecodes::Code bc = last_frame.code();
173 log.print("InterpreterRuntime: " INTPTR_FORMAT ": %s: " INTPTR_FORMAT,
174 p2i(current), Bytecodes::name(bc), p2i(caller));
175 if (caller->in_aot_cache()) {
176 log.print(" aot");
177 }
178 if (is_resolved(current)) {
179 log.print(" resolved");
180 }
181 log.print(" ");
182 caller->print_short_name(&log);
183 log.print(" @ %d:", last_frame.bci());
184 int instruction_size = last_frame.bytecode().instruction_size();
185
186 if (Bytecodes::is_invoke(bc) && bc != Bytecodes::_invokedynamic) {
187 int index = last_frame.get_index_u2(bc);
188 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
189 if (rme->is_resolved(bc)) {
190 Method* m = rme->method();
191 if (m != nullptr) {
192 log.print(" %s", m->method_holder()->init_state_name());
193 } else {
194 log.print(" null");
195 }
196 }
197 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
198 if (bc == Bytecodes::_nofast_getfield) {
199 bc = Bytecodes::_getfield;
200 } else if (bc == Bytecodes::_nofast_putfield) {
201 bc = Bytecodes::_putfield;
202 }
203 int index = last_frame.get_index_u2(bc);
204 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
205
206 if (field_entry->is_resolved(bc)) {
207 log.print(" %s", field_entry->field_holder()->init_state_name());
208 }
209 } else if (bc == Bytecodes::_new) {
210 int index = last_frame.get_index_u2(bc);
211 constantTag tag = constants->tag_at(index);
212 assert(tag.is_klass_or_reference(), "unknown tag: %s", tag.internal_name());
213 if (constants->tag_at(index).is_klass()) {
214 CPKlassSlot kslot = constants->klass_slot_at(index);
215 int resolved_klass_index = kslot.resolved_klass_index();
216 Klass* k = constants->resolved_klasses()->at(resolved_klass_index);
217 log.print(": %s", InstanceKlass::cast(k)->init_state_name());
218 }
219 }
220 log.print(" ");
221 caller->print_codes_on(last_frame.bci(), last_frame.bci() + instruction_size, &log, /*flags*/ 0);
222
223 LogStreamHandle(Trace, init, interpreter) log1;
224 if (log1.is_enabled()) {
225 if (bc == Bytecodes::_invokedynamic) {
226 int index = last_frame.get_index_u4(bc);
227 int indy_index = index;
228 ResolvedIndyEntry* indy_entry = constants->resolved_indy_entry_at(indy_index);
229 indy_entry->print_on(&log1);
230 } else if (Bytecodes::is_invoke(bc)) {
231 int index = last_frame.get_index_u2(bc);
232 ResolvedMethodEntry* rme = constants->resolved_method_entry_at(index);
233 rme->print_on(&log1);
234 } else if (Bytecodes::is_field_code(bc) || bc == Bytecodes::_nofast_getfield || bc == Bytecodes::_nofast_putfield) {
235 int index = last_frame.get_index_u2(bc);
236 ResolvedFieldEntry* field_entry = constants->cache()->resolved_field_entry_at(index);
237 field_entry->print_on(&log1);
238 }
239 }
240 }
241 }
242
243 //------------------------------------------------------------------------------------------------------------------------
244 // State accessors
245
246 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread* current) {
247 LastFrameAccessor last_frame(current);
248 last_frame.set_bcp(bcp);
249 if (ProfileInterpreter) {
250 // ProfileTraps uses MDOs independently of ProfileInterpreter.
251 // That is why we must check both ProfileInterpreter and mdo != nullptr.
252 MethodData* mdo = last_frame.method()->method_data();
253 if (mdo != nullptr) {
254 NEEDS_CLEANUP;
255 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
256 }
257 }
258 }
259
260 //------------------------------------------------------------------------------------------------------------------------
261 // Constants
262
263
264 JRT_ENTRY_PROF(void, InterpreterRuntime, ldc, InterpreterRuntime::ldc(JavaThread* current, bool wide))
265 // access constant pool
266 LastFrameAccessor last_frame(current);
267 ConstantPool* pool = last_frame.method()->constants();
268 int cp_index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
269 constantTag tag = pool->tag_at(cp_index);
270
271 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
272 Klass* klass = pool->klass_at(cp_index, CHECK);
273 oop java_class = klass->java_mirror();
274 current->set_vm_result_oop(java_class);
275 JRT_END
276
277 JRT_ENTRY_PROF(void, InterpreterRuntime, resolve_ldc, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
278 assert(bytecode == Bytecodes::_ldc ||
279 bytecode == Bytecodes::_ldc_w ||
280 bytecode == Bytecodes::_ldc2_w ||
281 bytecode == Bytecodes::_fast_aldc ||
282 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
283 ResourceMark rm(current);
284 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
285 bytecode == Bytecodes::_fast_aldc_w);
286 LastFrameAccessor last_frame(current);
287 methodHandle m (current, last_frame.method());
288 Bytecode_loadconstant ldc(m, last_frame.bci());
289
290 // Double-check the size. (Condy can have any type.)
291 BasicType type = ldc.result_type();
292 switch (type2size[type]) {
293 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
294 case 1: guarantee(bytecode != Bytecodes::_ldc2_w, ""); break;
295 default: ShouldNotReachHere();
296 }
297
313 assert(roop == coop, "expected result for assembly code");
314 }
315 }
316 #endif
317 current->set_vm_result_oop(result);
318 if (!is_fast_aldc) {
319 // Tell the interpreter how to unbox the primitive.
320 guarantee(java_lang_boxing_object::is_instance(result, type), "");
321 int offset = java_lang_boxing_object::value_offset(type);
322 intptr_t flags = ((as_TosState(type) << ConstantPoolCache::tos_state_shift)
323 | (offset & ConstantPoolCache::field_index_mask));
324 current->set_vm_result_metadata((Metadata*)flags);
325 }
326 }
327 JRT_END
328
329
330 //------------------------------------------------------------------------------------------------------------------------
331 // Allocation
332
333 JRT_ENTRY_PROF(void, InterpreterRuntime, new, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
334 Klass* k = pool->klass_at(index, CHECK);
335 InstanceKlass* klass = InstanceKlass::cast(k);
336
337 // Make sure we are not instantiating an abstract klass
338 klass->check_valid_for_instantiation(true, CHECK);
339
340 // Make sure klass is initialized
341 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
342
343 oop obj = klass->allocate_instance(CHECK);
344 current->set_vm_result_oop(obj);
345 JRT_END
346
347
348 JRT_ENTRY_PROF(void, InterpreterRuntime, newarray, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
349 oop obj = oopFactory::new_typeArray(type, size, CHECK);
350 current->set_vm_result_oop(obj);
351 JRT_END
352
353
354 JRT_ENTRY_PROF(void, InterpreterRuntime, anewarray, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
355 Klass* klass = pool->klass_at(index, CHECK);
356 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
357 current->set_vm_result_oop(obj);
358 JRT_END
359
360
361 JRT_ENTRY_PROF(void, InterpreterRuntime, multianewarray, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
362 // We may want to pass in more arguments - could make this slightly faster
363 LastFrameAccessor last_frame(current);
364 ConstantPool* constants = last_frame.method()->constants();
365 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
366 Klass* klass = constants->klass_at(i, CHECK);
367 int nof_dims = last_frame.number_of_dimensions();
368 assert(klass->is_klass(), "not a class");
369 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
370
371 // We must create an array of jints to pass to multi_allocate.
372 ResourceMark rm(current);
373 const int small_dims = 10;
374 jint dim_array[small_dims];
375 jint *dims = &dim_array[0];
376 if (nof_dims > small_dims) {
377 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
378 }
379 for (int index = 0; index < nof_dims; index++) {
380 // offset from first_size_address is addressed as local[index]
381 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
382 dims[index] = first_size_address[n];
383 }
384 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
385 current->set_vm_result_oop(obj);
386 JRT_END
387
388
389 JRT_ENTRY_PROF(void, InterpreterRuntime, register_finalizer, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
390 assert(oopDesc::is_oop(obj), "must be a valid oop");
391 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
392 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
393 JRT_END
394
395
396 // Quicken instance-of and check-cast bytecodes
397 JRT_ENTRY_PROF(void, InterpreterRuntime, quicken_io_cc, InterpreterRuntime::quicken_io_cc(JavaThread* current))
398 // Force resolving; quicken the bytecode
399 LastFrameAccessor last_frame(current);
400 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
401 ConstantPool* cpool = last_frame.method()->constants();
402 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
403 // program we might have seen an unquick'd bytecode in the interpreter but have another
404 // thread quicken the bytecode before we get here.
405 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
406 Klass* klass = cpool->klass_at(which, CHECK);
407 current->set_vm_result_metadata(klass);
408 JRT_END
409
410
411 //------------------------------------------------------------------------------------------------------------------------
412 // Exceptions
413
414 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
415 const methodHandle& trap_method, int trap_bci) {
416 if (trap_method.not_null()) {
417 MethodData* trap_mdo = trap_method->method_data();
449 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
450 // get klass
451 InstanceKlass* klass = InstanceKlass::cast(k);
452 assert(klass->is_initialized(),
453 "this klass should have been initialized during VM initialization");
454 // create instance - do not call constructor since we may have no
455 // (java) stack space left (should assert constructor is empty)
456 Handle exception;
457 oop exception_oop = klass->allocate_instance(CHECK_(exception));
458 exception = Handle(THREAD, exception_oop);
459 if (StackTraceInThrowable) {
460 java_lang_Throwable::fill_in_stack_trace(exception);
461 }
462 return exception;
463 }
464
465 // Special handling for stack overflow: since we don't have any (java) stack
466 // space left we use the pre-allocated & pre-initialized StackOverflowError
467 // klass to create an stack overflow error instance. We do not call its
468 // constructor for the same reason (it is empty, anyway).
469 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_StackOverflowError,
470 InterpreterRuntime::throw_StackOverflowError(JavaThread* current))
471 Handle exception = get_preinitialized_exception(
472 vmClasses::StackOverflowError_klass(),
473 CHECK);
474 // Increment counter for hs_err file reporting
475 Exceptions::increment_stack_overflow_errors();
476 // Remove the ScopedValue bindings in case we got a StackOverflowError
477 // while we were trying to manipulate ScopedValue bindings.
478 current->clear_scopedValueBindings();
479 THROW_HANDLE(exception);
480 JRT_END
481
482 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_delayed_StackOverflowError,
483 InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* current))
484 Handle exception = get_preinitialized_exception(
485 vmClasses::StackOverflowError_klass(),
486 CHECK);
487 java_lang_Throwable::set_message(exception(),
488 Universe::delayed_stack_overflow_error_message());
489 // Increment counter for hs_err file reporting
490 Exceptions::increment_stack_overflow_errors();
491 // Remove the ScopedValue bindings in case we got a StackOverflowError
492 // while we were trying to manipulate ScopedValue bindings.
493 current->clear_scopedValueBindings();
494 THROW_HANDLE(exception);
495 JRT_END
496
497 JRT_ENTRY_PROF(void, InterpreterRuntime, create_exception,
498 InterpreterRuntime::create_exception(JavaThread* current, char* name, char* message))
499 // lookup exception klass
500 TempNewSymbol s = SymbolTable::new_symbol(name);
501 if (ProfileTraps) {
502 if (s == vmSymbols::java_lang_ArithmeticException()) {
503 note_trap(current, Deoptimization::Reason_div0_check);
504 } else if (s == vmSymbols::java_lang_NullPointerException()) {
505 note_trap(current, Deoptimization::Reason_null_check);
506 }
507 }
508 // create exception
509 Handle exception = Exceptions::new_exception(current, s, message);
510 current->set_vm_result_oop(exception());
511 JRT_END
512
513
514 JRT_ENTRY_PROF(void, InterpreterRuntime, create_klass_exception,
515 InterpreterRuntime::create_klass_exception(JavaThread* current, char* name, oopDesc* obj))
516 // Produce the error message first because note_trap can safepoint
517 ResourceMark rm(current);
518 const char* klass_name = obj->klass()->external_name();
519 // lookup exception klass
520 TempNewSymbol s = SymbolTable::new_symbol(name);
521 if (ProfileTraps) {
522 if (s == vmSymbols::java_lang_ArrayStoreException()) {
523 note_trap(current, Deoptimization::Reason_array_check);
524 } else {
525 note_trap(current, Deoptimization::Reason_class_check);
526 }
527 }
528 // create exception, with klass name as detail message
529 Handle exception = Exceptions::new_exception(current, s, klass_name);
530 current->set_vm_result_oop(exception());
531 JRT_END
532
533 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ArrayIndexOutOfBoundsException,
534 InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* current, arrayOopDesc* a, jint index))
535 // Produce the error message first because note_trap can safepoint
536 ResourceMark rm(current);
537 stringStream ss;
538 ss.print("Index %d out of bounds for length %d", index, a->length());
539
540 if (ProfileTraps) {
541 note_trap(current, Deoptimization::Reason_range_check);
542 }
543
544 THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), ss.as_string());
545 JRT_END
546
547 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_ClassCastException,
548 InterpreterRuntime::throw_ClassCastException(
549 JavaThread* current, oopDesc* obj))
550
551 // Produce the error message first because note_trap can safepoint
552 ResourceMark rm(current);
553 char* message = SharedRuntime::generate_class_cast_message(
554 current, obj->klass());
555
556 if (ProfileTraps) {
557 note_trap(current, Deoptimization::Reason_class_check);
558 }
559
560 // create exception
561 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
562 JRT_END
563
564 // exception_handler_for_exception(...) returns the continuation address,
565 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
566 // The exception oop is returned to make sure it is preserved over GC (it
567 // is only on the stack if the exception was thrown explicitly via athrow).
568 // During this operation, the expression stack contains the values for the
569 // bci where the exception happened. If the exception was propagated back
570 // from a call, the expression stack contains the values for the bci at the
571 // invoke w/o arguments (i.e., as if one were inside the call).
572 // Note that the implementation of this method assumes it's only called when an exception has actually occured
573 JRT_ENTRY_PROF(address, InterpreterRuntime, exception_handler_for_exception,
574 InterpreterRuntime::exception_handler_for_exception(JavaThread* current, oopDesc* exception))
575 // We get here after we have unwound from a callee throwing an exception
576 // into the interpreter. Any deferred stack processing is notified of
577 // the event via the StackWatermarkSet.
578 StackWatermarkSet::after_unwind(current);
579
580 LastFrameAccessor last_frame(current);
581 Handle h_exception(current, exception);
582 methodHandle h_method (current, last_frame.method());
583 constantPoolHandle h_constants(current, h_method->constants());
584 bool should_repeat;
585 int handler_bci;
586 int current_bci = last_frame.bci();
587
588 if (current->frames_to_pop_failed_realloc() > 0) {
589 // Allocation of scalar replaced object used in this frame
590 // failed. Unconditionally pop the frame.
591 current->dec_frames_to_pop_failed_realloc();
592 current->set_vm_result_oop(h_exception());
593 // If the method is synchronized we already unlocked the monitor
594 // during deoptimization so the interpreter needs to skip it when
697 h_method->set_exception_handler_entered(handler_bci); // profiling
698 #ifndef ZERO
699 set_bcp_and_mdp(handler_pc, current);
700 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
701 #else
702 continuation = (address)(intptr_t) handler_bci;
703 #endif
704 }
705
706 // notify debugger of an exception catch
707 // (this is good for exceptions caught in native methods as well)
708 if (JvmtiExport::can_post_on_exceptions()) {
709 JvmtiExport::notice_unwind_due_to_exception(current, h_method(), handler_pc, h_exception(), (handler_pc != nullptr));
710 }
711
712 current->set_vm_result_oop(h_exception());
713 return continuation;
714 JRT_END
715
716
717 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_pending_exception, InterpreterRuntime::throw_pending_exception(JavaThread* current))
718 assert(current->has_pending_exception(), "must only be called if there's an exception pending");
719 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
720 JRT_END
721
722
723 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodError, InterpreterRuntime::throw_AbstractMethodError(JavaThread* current))
724 THROW(vmSymbols::java_lang_AbstractMethodError());
725 JRT_END
726
727 // This method is called from the "abstract_entry" of the interpreter.
728 // At that point, the arguments have already been removed from the stack
729 // and therefore we don't have the receiver object at our fingertips. (Though,
730 // on some platforms the receiver still resides in a register...). Thus,
731 // we have no choice but print an error message not containing the receiver
732 // type.
733 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorWithMethod,
734 InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
735 Method* missingMethod))
736 ResourceMark rm(current);
737 assert(missingMethod != nullptr, "sanity");
738 methodHandle m(current, missingMethod);
739 LinkResolver::throw_abstract_method_error(m, THREAD);
740 JRT_END
741
742 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_AbstractMethodErrorVerbose,
743 InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
744 Klass* recvKlass,
745 Method* missingMethod))
746 ResourceMark rm(current);
747 methodHandle mh = methodHandle(current, missingMethod);
748 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
749 JRT_END
750
751
752 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeError,
753 InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
754 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
755 JRT_END
756
757 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose,
758 InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
759 Klass* recvKlass,
760 Klass* interfaceKlass))
761 ResourceMark rm(current);
762 char buf[1000];
763 buf[0] = '\0';
764 jio_snprintf(buf, sizeof(buf),
765 "Class %s does not implement the requested interface %s",
766 recvKlass ? recvKlass->external_name() : "nullptr",
767 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
768 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
769 JRT_END
770
771 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_NullPointerException,
772 InterpreterRuntime::throw_NullPointerException(JavaThread* current))
773 THROW(vmSymbols::java_lang_NullPointerException());
774 JRT_END
775
776 //------------------------------------------------------------------------------------------------------------------------
777 // Fields
778 //
779
780 PROF_ENTRY(void, InterpreterRuntime, resolve_getfield, InterpreterRuntime::resolve_getfield(JavaThread* current))
781 resolve_get_put(Bytecodes::_getfield, current);
782 PROF_END
783
784 PROF_ENTRY(void, InterpreterRuntime, resolve_putfield, InterpreterRuntime::resolve_putfield(JavaThread* current))
785 resolve_get_put(Bytecodes::_putfield, current);
786 PROF_END
787
788 PROF_ENTRY(void, InterpreterRuntime, resolve_getstatic, InterpreterRuntime::resolve_getstatic(JavaThread* current))
789 resolve_get_put(Bytecodes::_getstatic, current);
790 PROF_END
791
792 PROF_ENTRY(void, InterpreterRuntime, resolve_putstatic, InterpreterRuntime::resolve_putstatic(JavaThread* current))
793 resolve_get_put(Bytecodes::_putstatic, current);
794 PROF_END
795
796 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, TRAPS) {
797 JavaThread* current = THREAD;
798 LastFrameAccessor last_frame(current);
799 constantPoolHandle pool(current, last_frame.method()->constants());
800 methodHandle m(current, last_frame.method());
801
802 resolve_get_put(bytecode, last_frame.get_index_u2(bytecode), m, pool, ClassInitMode::init_preemptable, THREAD);
803 }
804
805 void InterpreterRuntime::resolve_get_put(Bytecodes::Code bytecode, int field_index,
806 methodHandle& m,
807 constantPoolHandle& pool,
808 ClassInitMode init_mode, TRAPS) {
809 fieldDescriptor info;
810 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
811 bytecode == Bytecodes::_putstatic);
812 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
813
814 {
815 JvmtiHideSingleStepping jhss(THREAD);
854 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
855 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
856 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
857 }
858 }
859
860 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
861 entry->fill_in(info, checked_cast<u1>(state),
862 static_cast<u1>(get_code), static_cast<u1>(put_code));
863 }
864
865
866 //------------------------------------------------------------------------------------------------------------------------
867 // Synchronization
868 //
869 // The interpreter's synchronization code is factored out so that it can
870 // be shared by method invocation and synchronized blocks.
871 //%note synchronization_3
872
873 //%note monitor_1
874 JRT_ENTRY_NO_ASYNC_PROF(void, InterpreterRuntime, monitorenter, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
875 #ifdef ASSERT
876 current->last_frame().interpreter_frame_verify_monitor(elem);
877 #endif
878 Handle h_obj(current, elem->obj());
879 assert(Universe::heap()->is_in_or_null(h_obj()),
880 "must be null or an object");
881 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
882 assert(Universe::heap()->is_in_or_null(elem->obj()),
883 "must be null or an object");
884 #ifdef ASSERT
885 if (!current->preempting()) current->last_frame().interpreter_frame_verify_monitor(elem);
886 #endif
887 JRT_END
888
889 JRT_LEAF_PROF_NO_THREAD(void, InterpreterRuntime, monitorexit, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
890 oop obj = elem->obj();
891 assert(Universe::heap()->is_in(obj), "must be an object");
892 // The object could become unlocked through a JNI call, which we have no other checks for.
893 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
894 if (obj->is_unlocked()) {
895 if (CheckJNICalls) {
896 fatal("Object has been unlocked by JNI");
897 }
898 return;
899 }
900 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
901 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
902 // again at method exit or in the case of an exception.
903 elem->set_obj(nullptr);
904 JRT_END
905
906
907 JRT_ENTRY_PROF(void, InterpreterRuntime, throw_illegal_monitor_state_exception,
908 InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
909 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
910 JRT_END
911
912
913 JRT_ENTRY_PROF(void, InterpreterRuntime, new_illegal_monitor_state_exception,
914 InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
915 // Returns an illegal exception to install into the current thread. The
916 // pending_exception flag is cleared so normal exception handling does not
917 // trigger. Any current installed exception will be overwritten. This
918 // method will be called during an exception unwind.
919
920 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
921 Handle exception(current, current->vm_result_oop());
922 assert(exception() != nullptr, "vm result should be set");
923 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
924 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
925 current->set_vm_result_oop(exception());
926 JRT_END
927
928
929 //------------------------------------------------------------------------------------------------------------------------
930 // Invokes
931
932 JRT_ENTRY_PROF(Bytecodes::Code, InterpreterRuntime, get_original_bytecode_at, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
933 return method->orig_bytecode_at(method->bci_from(bcp));
934 JRT_END
935
936 JRT_ENTRY_PROF(void, InterpreterRuntime, set_original_bytecode_at, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
937 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
938 JRT_END
939
940 JRT_ENTRY_PROF(void, InterpreterRuntime, breakpoint, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
941 JvmtiExport::post_raw_breakpoint(current, method, bcp);
942 JRT_END
943
944 PROF_ENTRY(void, InterpreterRuntime, resolve_invokevirtual, InterpreterRuntime::resolve_invokevirtual(JavaThread* current))
945 resolve_invoke(Bytecodes::_invokevirtual, current);
946 PROF_END
947
948 PROF_ENTRY(void, InterpreterRuntime, resolve_invokespecial, InterpreterRuntime::resolve_invokespecial(JavaThread* current))
949 resolve_invoke(Bytecodes::_invokespecial, current);
950 PROF_END
951
952 PROF_ENTRY(void, InterpreterRuntime, resolve_invokestatic, InterpreterRuntime::resolve_invokestatic(JavaThread* current))
953 resolve_invoke(Bytecodes::_invokestatic, current);
954 PROF_END
955
956 PROF_ENTRY(void, InterpreterRuntime, resolve_invokeinterface, InterpreterRuntime::resolve_invokeinterface(JavaThread* current))
957 resolve_invoke(Bytecodes::_invokeinterface, current);
958 PROF_END
959
960 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
961 JavaThread* current = THREAD;
962 LastFrameAccessor last_frame(current);
963 // extract receiver from the outgoing argument list if necessary
964 Handle receiver(current, nullptr);
965 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
966 bytecode == Bytecodes::_invokespecial) {
967 ResourceMark rm(current);
968 methodHandle m (current, last_frame.method());
969 Bytecode_invoke call(m, last_frame.bci());
970 Symbol* signature = call.signature();
971 receiver = Handle(current, last_frame.callee_receiver(signature));
972
973 assert(Universe::heap()->is_in_or_null(receiver()),
974 "sanity check");
975 assert(receiver.is_null() ||
976 !Universe::heap()->is_in(receiver->klass()),
977 "sanity check");
978 }
979
1079 case Bytecodes::_invokespecial: LinkResolver::cds_resolve_special_call (call_info, link_info, CHECK); break;
1080
1081 default: fatal("Unimplemented: %s", Bytecodes::name(bytecode));
1082 }
1083 methodHandle resolved_method(THREAD, call_info.resolved_method());
1084 guarantee(resolved_method->method_holder()->is_linked(), "");
1085 update_invoke_cp_cache_entry(call_info, bytecode, resolved_method, pool, method_index);
1086 } else {
1087 // FIXME: why a shared class is not linked yet?
1088 // Can't link it here since there are no guarantees it'll be prelinked on the next run.
1089 ResourceMark rm;
1090 InstanceKlass* resolved_iklass = InstanceKlass::cast(link_info.resolved_klass());
1091 log_info(aot, resolve)("Not resolved: class not linked: %s %s %s",
1092 resolved_iklass->in_aot_cache() ? "in_aot_cache" : "",
1093 resolved_iklass->init_state_name(),
1094 resolved_iklass->external_name());
1095 }
1096 }
1097
1098 // First time execution: Resolve symbols, create a permanent MethodType object.
1099 PROF_ENTRY(void, InterpreterRuntime, resolve_invokehandle, InterpreterRuntime::resolve_invokehandle(JavaThread* current))
1100 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1101 LastFrameAccessor last_frame(current);
1102
1103 // resolve method
1104 CallInfo info;
1105 constantPoolHandle pool(current, last_frame.method()->constants());
1106 int method_index = last_frame.get_index_u2(bytecode);
1107 {
1108 JvmtiHideSingleStepping jhss(current);
1109 JavaThread* THREAD = current; // For exception macros.
1110 LinkResolver::resolve_invoke(info, Handle(), pool,
1111 method_index, bytecode,
1112 CHECK);
1113 } // end JvmtiHideSingleStepping
1114
1115 pool->cache()->set_method_handle(method_index, info);
1116 PROF_END
1117
1118 void InterpreterRuntime::cds_resolve_invokehandle(int raw_index,
1119 constantPoolHandle& pool, TRAPS) {
1120 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
1121 CallInfo info;
1122 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1123
1124 pool->cache()->set_method_handle(raw_index, info);
1125 }
1126
1127 // First time execution: Resolve symbols, create a permanent CallSite object.
1128 PROF_ENTRY(void, InterpreterRuntime, resolve_invokedynamic, InterpreterRuntime::resolve_invokedynamic(JavaThread* current))
1129 LastFrameAccessor last_frame(current);
1130 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1131
1132 // resolve method
1133 CallInfo info;
1134 constantPoolHandle pool(current, last_frame.method()->constants());
1135 int index = last_frame.get_index_u4(bytecode);
1136 {
1137 JvmtiHideSingleStepping jhss(current);
1138 JavaThread* THREAD = current; // For exception macros.
1139 LinkResolver::resolve_invoke(info, Handle(), pool,
1140 index, bytecode, CHECK);
1141 } // end JvmtiHideSingleStepping
1142
1143 pool->cache()->set_dynamic_call(info, index);
1144 PROF_END
1145
1146 void InterpreterRuntime::cds_resolve_invokedynamic(int raw_index,
1147 constantPoolHandle& pool, TRAPS) {
1148 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
1149 CallInfo info;
1150 LinkResolver::resolve_invoke(info, Handle(), pool, raw_index, bytecode, CHECK);
1151 pool->cache()->set_dynamic_call(info, raw_index);
1152 }
1153
1154 // This function is the interface to the assembly code. It returns the resolved
1155 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1156 // This function will check for redefinition!
1157 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1158 trace_current_location(current);
1159
1160 switch (bytecode) {
1161 #if 0 // LEYDEN tracing - disabled after c6a88155b519a5d0b22f6009e75a0e6388601756
1162 case Bytecodes::_getstatic: resolve_getstatic(current); break;
1163 case Bytecodes::_putstatic: resolve_putstatic(current); break;
1164 case Bytecodes::_getfield: resolve_getfield(current); break;
1165 case Bytecodes::_putfield: resolve_putfield(current); break;
1166
1167 case Bytecodes::_invokevirtual: resolve_invokevirtual(current); break;
1168 case Bytecodes::_invokespecial: resolve_invokespecial(current); break;
1169 case Bytecodes::_invokestatic: resolve_invokestatic(current); break;
1170 case Bytecodes::_invokeinterface: resolve_invokeinterface(current); break;
1171 case Bytecodes::_invokehandle: resolve_invokehandle(current); break;
1172 case Bytecodes::_invokedynamic: resolve_invokedynamic(current); break;
1173 #endif
1174 case Bytecodes::_getstatic:
1175 case Bytecodes::_putstatic:
1176 case Bytecodes::_getfield:
1177 case Bytecodes::_putfield:
1178 resolve_get_put(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1179 break;
1180 case Bytecodes::_invokevirtual:
1181 case Bytecodes::_invokespecial:
1182 case Bytecodes::_invokestatic:
1183 case Bytecodes::_invokeinterface:
1184 resolve_invoke(bytecode, CHECK_AND_CLEAR_PREEMPTED);
1185 break;
1186 case Bytecodes::_invokehandle:
1187 resolve_invokehandle(THREAD);
1188 break;
1189 case Bytecodes::_invokedynamic:
1190 resolve_invokedynamic(THREAD);
1191 break;
1192 default:
1193 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1194 break;
1195 }
1196 }
1197 JRT_END
1198
1199 //------------------------------------------------------------------------------------------------------------------------
1200 // Miscellaneous
1201
1202
1203 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* current, address branch_bcp) {
1204 assert(!PreloadOnly, "Should not be using interpreter counters");
1205
1206 // Enable WXWrite: the function is called directly by interpreter.
1207 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, current));
1208
1209 // frequency_counter_overflow_inner can throw async exception.
1210 nmethod* nm = frequency_counter_overflow_inner(current, branch_bcp);
1211 assert(branch_bcp != nullptr || nm == nullptr, "always returns null for non OSR requests");
1212 if (branch_bcp != nullptr && nm != nullptr) {
1213 // This was a successful request for an OSR nmethod. Because
1214 // frequency_counter_overflow_inner ends with a safepoint check,
1215 // nm could have been unloaded so look it up again. It's unsafe
1216 // to examine nm directly since it might have been freed and used
1217 // for something else.
1218 LastFrameAccessor last_frame(current);
1219 Method* method = last_frame.method();
1220 int bci = method->bci_from(last_frame.bcp());
1221 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
1222 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1223 if (nm != nullptr) {
1224 // in case the transition passed a safepoint we need to barrier this again
1225 if (!bs_nm->nmethod_osr_entry_barrier(nm)) {
1229 }
1230 if (nm != nullptr && current->is_interp_only_mode()) {
1231 // Normally we never get an nm if is_interp_only_mode() is true, because
1232 // policy()->event has a check for this and won't compile the method when
1233 // true. However, it's possible for is_interp_only_mode() to become true
1234 // during the compilation. We don't want to return the nm in that case
1235 // because we want to continue to execute interpreted.
1236 nm = nullptr;
1237 }
1238 #ifndef PRODUCT
1239 if (TraceOnStackReplacement) {
1240 if (nm != nullptr) {
1241 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
1242 nm->print();
1243 }
1244 }
1245 #endif
1246 return nm;
1247 }
1248
1249 JRT_ENTRY_PROF(nmethod*, InterpreterRuntime, frequency_counter_overflow,
1250 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* current, address branch_bcp))
1251 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
1252 // flag, in case this method triggers classloading which will call into Java.
1253 UnlockFlagSaver fs(current);
1254
1255 LastFrameAccessor last_frame(current);
1256 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1257 methodHandle method(current, last_frame.method());
1258 const int branch_bci = branch_bcp != nullptr ? method->bci_from(branch_bcp) : InvocationEntryBci;
1259 const int bci = branch_bcp != nullptr ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
1260
1261 nmethod* osr_nm = CompilationPolicy::event(method, method, branch_bci, bci, CompLevel_none, nullptr, CHECK_NULL);
1262
1263 BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
1264 if (osr_nm != nullptr) {
1265 if (!bs_nm->nmethod_osr_entry_barrier(osr_nm)) {
1266 osr_nm = nullptr;
1267 }
1268 }
1269 return osr_nm;
1270 JRT_END
1271
1272 JRT_LEAF_PROF_NO_THREAD(jint, InterpreterRuntime, bcp_to_di, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
1273 assert(ProfileInterpreter, "must be profiling interpreter");
1274 int bci = method->bci_from(cur_bcp);
1275 MethodData* mdo = method->method_data();
1276 if (mdo == nullptr) return 0;
1277 return mdo->bci_to_di(bci);
1278 JRT_END
1279
1280 #ifdef ASSERT
1281 JRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1282 assert(ProfileInterpreter, "must be profiling interpreter");
1283
1284 MethodData* mdo = method->method_data();
1285 assert(mdo != nullptr, "must not be null");
1286
1287 int bci = method->bci_from(bcp);
1288
1289 address mdp2 = mdo->bci_to_dp(bci);
1290 if (mdp != mdp2) {
1291 ResourceMark rm;
1292 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1293 int current_di = mdo->dp_to_di(mdp);
1294 int expected_di = mdo->dp_to_di(mdp2);
1295 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1296 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1297 int approx_bci = -1;
1298 if (current_di >= 0) {
1299 approx_bci = mdo->data_at(current_di)->bci();
1300 }
1301 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1302 mdo->print_on(tty);
1303 method->print_codes();
1304 }
1305 assert(mdp == mdp2, "wrong mdp");
1306 JRT_END
1307 #endif // ASSERT
1308
1309 JRT_ENTRY_PROF(void, InterpreterRuntime, update_mdp_for_ret, InterpreterRuntime::update_mdp_for_ret(JavaThread* current, int return_bci))
1310 assert(!PreloadOnly, "Should not be using interpreter counters");
1311 assert(ProfileInterpreter, "must be profiling interpreter");
1312 ResourceMark rm(current);
1313 LastFrameAccessor last_frame(current);
1314 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1315 MethodData* h_mdo = last_frame.method()->method_data();
1316
1317 // Grab a lock to ensure atomic access to setting the return bci and
1318 // the displacement. This can block and GC, invalidating all naked oops.
1319 MutexLocker ml(RetData_lock);
1320
1321 // ProfileData is essentially a wrapper around a derived oop, so we
1322 // need to take the lock before making any ProfileData structures.
1323 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1324 guarantee(data != nullptr, "profile data must be valid");
1325 RetData* rdata = data->as_RetData();
1326 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1327 last_frame.set_mdp(new_mdp);
1328 JRT_END
1329
1330 JRT_ENTRY_PROF(MethodCounters*, InterpreterRuntime, build_method_counters, InterpreterRuntime::build_method_counters(JavaThread* current, Method* m))
1331 return Method::build_method_counters(current, m);
1332 JRT_END
1333
1334
1335 JRT_ENTRY_PROF(void, InterpreterRuntime, at_safepoint, InterpreterRuntime::at_safepoint(JavaThread* current))
1336 // We used to need an explicit preserve_arguments here for invoke bytecodes. However,
1337 // stack traversal automatically takes care of preserving arguments for invoke, so
1338 // this is no longer needed.
1339
1340 // JRT_END does an implicit safepoint check, hence we are guaranteed to block
1341 // if this is called during a safepoint
1342
1343 if (JvmtiExport::should_post_single_step()) {
1344 // This function is called by the interpreter when single stepping. Such single
1345 // stepping could unwind a frame. Then, it is important that we process any frames
1346 // that we might return into.
1347 StackWatermarkSet::before_unwind(current);
1348
1349 // We are called during regular safepoints and when the VM is
1350 // single stepping. If any thread is marked for single stepping,
1351 // then we may have JVMTI work to do.
1352 LastFrameAccessor last_frame(current);
1353 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1354 }
1355 JRT_END
1356
1357 JRT_LEAF_PROF(void, InterpreterRuntime, at_unwind, InterpreterRuntime::at_unwind(JavaThread* current))
1358 assert(current == JavaThread::current(), "pre-condition");
1359 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
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 InstanceKlass* ik = entry->field_holder();
1375 int index = entry->field_index();
1376 if (!ik->field_status(index).is_access_watched()) return;
1377
1378 bool is_static = (obj == nullptr);
1379 HandleMark hm(current);
1380
1381 Handle h_obj;
1382 if (!is_static) {
1383 // non-static field accessors have an object, but we need a handle
1384 h_obj = Handle(current, obj);
1385 }
1386 InstanceKlass* field_holder = entry->field_holder(); // HERE
1387 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1388 LastFrameAccessor last_frame(current);
1389 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1390 JRT_END
1391
1392 JRT_ENTRY_PROF(void, InterpreterRuntime, post_field_modification, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1393 ResolvedFieldEntry* entry, jvalue* value))
1394
1395 // check the access_flags for the field in the klass
1396 InstanceKlass* ik = entry->field_holder();
1397 int index = entry->field_index();
1398 // bail out if field modifications are not watched
1399 if (!ik->field_status(index).is_modification_watched()) return;
1400
1401 char sig_type = '\0';
1402
1403 switch((TosState)entry->tos_state()) {
1404 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1405 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1406 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1407 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1408 case itos: sig_type = JVM_SIGNATURE_INT; break;
1409 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1410 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1411 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1412 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1413 default: ShouldNotReachHere(); return;
1427 // We assume that the two halves of longs/doubles are stored in interpreter
1428 // stack slots in platform-endian order.
1429 jlong_accessor u;
1430 jint* newval = (jint*)value;
1431 u.words[0] = newval[0];
1432 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1433 fvalue.j = u.long_value;
1434 #endif // _LP64
1435
1436 Handle h_obj;
1437 if (!is_static) {
1438 // non-static field accessors have an object, but we need a handle
1439 h_obj = Handle(current, obj);
1440 }
1441
1442 LastFrameAccessor last_frame(current);
1443 JvmtiExport::post_raw_field_modification(current, last_frame.method(), last_frame.bcp(), ik, h_obj,
1444 fid, sig_type, &fvalue);
1445 JRT_END
1446
1447 JRT_ENTRY_PROF(void, InterpreterRuntime, post_method_entry, InterpreterRuntime::post_method_entry(JavaThread* current))
1448 LastFrameAccessor last_frame(current);
1449 JvmtiExport::post_method_entry(current, last_frame.method(), last_frame.get_frame());
1450 JRT_END
1451
1452
1453 // This is a JRT_BLOCK_ENTRY because we have to stash away the return oop
1454 // before transitioning to VM, and restore it after transitioning back
1455 // to Java. The return oop at the top-of-stack, is not walked by the GC.
1456 JRT_BLOCK_ENTRY_PROF(void, InterpreterRuntime, post_method_exit, InterpreterRuntime::post_method_exit(JavaThread* current))
1457 LastFrameAccessor last_frame(current);
1458 JvmtiExport::post_method_exit(current, last_frame.method(), last_frame.get_frame());
1459 JRT_END
1460
1461 JRT_LEAF_PROF_NO_THREAD(int, InterpreterRuntime, interpreter_contains, InterpreterRuntime::interpreter_contains(address pc))
1462 {
1463 return (Interpreter::contains(Continuation::get_top_return_pc_post_barrier(JavaThread::current(), pc)) ? 1 : 0);
1464 }
1465 JRT_END
1466
1467
1468 // Implementation of SignatureHandlerLibrary
1469
1470 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1471 // Dummy definition (else normalization method is defined in CPU
1472 // dependent code)
1473 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1474 return fingerprint;
1475 }
1476 #endif
1477
1478 address SignatureHandlerLibrary::set_handler_blob() {
1479 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1480 if (handler_blob == nullptr) {
1481 return nullptr;
1607 MutexLocker mu(SignatureHandlerLibrary_lock);
1608 if (_handlers != nullptr) {
1609 handler_index = _handlers->find(method->signature_handler());
1610 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1611 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1612 fingerprint_index = _fingerprints->find(fingerprint);
1613 }
1614 }
1615 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1616 handler_index == fingerprint_index, "sanity check");
1617 #endif // ASSERT
1618 }
1619
1620 BufferBlob* SignatureHandlerLibrary::_handler_blob = nullptr;
1621 address SignatureHandlerLibrary::_handler = nullptr;
1622 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = nullptr;
1623 GrowableArray<address>* SignatureHandlerLibrary::_handlers = nullptr;
1624 address SignatureHandlerLibrary::_buffer = nullptr;
1625
1626
1627 JRT_ENTRY_PROF(void, InterpreterRuntime, prepare_native_call, InterpreterRuntime::prepare_native_call(JavaThread* current, Method* method))
1628 methodHandle m(current, method);
1629 assert(m->is_native(), "sanity check");
1630 // lookup native function entry point if it doesn't exist
1631 if (!m->has_native_function()) {
1632 NativeLookup::lookup(m, CHECK);
1633 }
1634 // make sure signature handler is installed
1635 SignatureHandlerLibrary::add(m);
1636 // The interpreter entry point checks the signature handler first,
1637 // before trying to fetch the native entry point and klass mirror.
1638 // We must set the signature handler last, so that multiple processors
1639 // preparing the same method will be sure to see non-null entry & mirror.
1640 JRT_END
1641
1642 #if defined(AMD64) || defined(ARM)
1643 JRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* current, void* src_address, void* dest_address))
1644 assert(current == JavaThread::current(), "pre-condition");
1645 if (src_address == dest_address) {
1646 return;
1647 }
1648 ResourceMark rm;
1649 LastFrameAccessor last_frame(current);
1650 assert(last_frame.is_interpreted_frame(), "");
1651 jint bci = last_frame.bci();
1652 methodHandle mh(current, last_frame.method());
1653 Bytecode_invoke invoke(mh, bci);
1654 ArgumentSizeComputer asc(invoke.signature());
1655 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1656 Copy::conjoint_jbytes(src_address, dest_address,
1657 size_of_arguments * Interpreter::stackElementSize);
1658 JRT_END
1659 #endif
1660
1661 #if INCLUDE_JVMTI
1662 // This is a support of the JVMTI PopFrame interface.
1663 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1664 // and return it as a vm_result_oop so that it can be reloaded in the list of invokestatic parameters.
1665 // The member_name argument is a saved reference (in local#0) to the member_name.
1666 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1667 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1668 JRT_ENTRY_PROF(void, InterpreterRuntime, member_name_arg_or_null,
1669 InterpreterRuntime::member_name_arg_or_null(JavaThread* current, address member_name,
1670 Method* method, address bcp))
1671 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1672 if (code != Bytecodes::_invokestatic) {
1673 return;
1674 }
1675 ConstantPool* cpool = method->constants();
1676 int cp_index = Bytes::get_native_u2(bcp + 1);
1677 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index, code));
1678 Symbol* mname = cpool->name_ref_at(cp_index, code);
1679
1680 if (MethodHandles::has_member_arg(cname, mname)) {
1681 oop member_name_oop = cast_to_oop(member_name);
1682 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1683 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1684 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1685 }
1686 current->set_vm_result_oop(member_name_oop);
1687 } else {
1688 current->set_vm_result_oop(nullptr);
1689 }
1690 JRT_END
1695 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1696 // The generated code still uses call_VM because that will set up the frame pointer for
1697 // bcp and method.
1698 JRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* current, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1699 assert(current == JavaThread::current(), "pre-condition");
1700 LastFrameAccessor last_frame(current);
1701 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1702 methodHandle mh(current, last_frame.method());
1703 BytecodeTracer::trace_interpreter(mh, last_frame.bcp(), tos, tos2, tty);
1704 return preserve_this_value;
1705 JRT_END
1706 #endif // !PRODUCT
1707
1708 #ifdef ASSERT
1709 bool InterpreterRuntime::is_preemptable_call(address entry_point) {
1710 return entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter) ||
1711 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_from_cache) ||
1712 entry_point == CAST_FROM_FN_PTR(address, InterpreterRuntime::_new);
1713 }
1714 #endif // ASSERT
1715
1716 #define DO_COUNTERS(macro) \
1717 macro(InterpreterRuntime, ldc) \
1718 macro(InterpreterRuntime, resolve_ldc) \
1719 macro(InterpreterRuntime, new) \
1720 macro(InterpreterRuntime, newarray) \
1721 macro(InterpreterRuntime, anewarray) \
1722 macro(InterpreterRuntime, multianewarray) \
1723 macro(InterpreterRuntime, register_finalizer) \
1724 macro(InterpreterRuntime, quicken_io_cc) \
1725 macro(InterpreterRuntime, throw_StackOverflowError) \
1726 macro(InterpreterRuntime, throw_delayed_StackOverflowError) \
1727 macro(InterpreterRuntime, create_exception) \
1728 macro(InterpreterRuntime, create_klass_exception) \
1729 macro(InterpreterRuntime, throw_ArrayIndexOutOfBoundsException) \
1730 macro(InterpreterRuntime, throw_ClassCastException) \
1731 macro(InterpreterRuntime, exception_handler_for_exception) \
1732 macro(InterpreterRuntime, throw_pending_exception) \
1733 macro(InterpreterRuntime, throw_AbstractMethodError) \
1734 macro(InterpreterRuntime, throw_AbstractMethodErrorWithMethod) \
1735 macro(InterpreterRuntime, throw_AbstractMethodErrorVerbose) \
1736 macro(InterpreterRuntime, throw_IncompatibleClassChangeError) \
1737 macro(InterpreterRuntime, throw_IncompatibleClassChangeErrorVerbose) \
1738 macro(InterpreterRuntime, throw_NullPointerException) \
1739 macro(InterpreterRuntime, monitorenter) \
1740 macro(InterpreterRuntime, monitorexit) \
1741 macro(InterpreterRuntime, throw_illegal_monitor_state_exception) \
1742 macro(InterpreterRuntime, new_illegal_monitor_state_exception) \
1743 macro(InterpreterRuntime, get_original_bytecode_at) \
1744 macro(InterpreterRuntime, set_original_bytecode_at) \
1745 macro(InterpreterRuntime, breakpoint) \
1746 macro(InterpreterRuntime, resolve_getfield) \
1747 macro(InterpreterRuntime, resolve_putfield) \
1748 macro(InterpreterRuntime, resolve_getstatic) \
1749 macro(InterpreterRuntime, resolve_putstatic) \
1750 macro(InterpreterRuntime, resolve_invokevirtual) \
1751 macro(InterpreterRuntime, resolve_invokespecial) \
1752 macro(InterpreterRuntime, resolve_invokestatic) \
1753 macro(InterpreterRuntime, resolve_invokeinterface) \
1754 macro(InterpreterRuntime, resolve_invokehandle) \
1755 macro(InterpreterRuntime, resolve_invokedynamic) \
1756 macro(InterpreterRuntime, frequency_counter_overflow) \
1757 macro(InterpreterRuntime, bcp_to_di) \
1758 macro(InterpreterRuntime, update_mdp_for_ret) \
1759 macro(InterpreterRuntime, build_method_counters) \
1760 macro(InterpreterRuntime, at_safepoint) \
1761 macro(InterpreterRuntime, at_unwind) \
1762 macro(InterpreterRuntime, post_field_access) \
1763 macro(InterpreterRuntime, post_field_modification) \
1764 macro(InterpreterRuntime, post_method_entry) \
1765 macro(InterpreterRuntime, post_method_exit) \
1766 macro(InterpreterRuntime, interpreter_contains) \
1767 macro(InterpreterRuntime, prepare_native_call)
1768
1769 #if INCLUDE_JVMTI
1770 #define DO_JVMTI_COUNTERS(macro) \
1771 macro(InterpreterRuntime, member_name_arg_or_null)
1772 #else
1773 #define DO_JVMTI_COUNTERS(macro)
1774 #endif /* INCLUDE_JVMTI */
1775
1776 #define INIT_COUNTER(sub, name) \
1777 NEWPERFTICKCOUNTERS(_perf_##sub##_##name##_timer, SUN_CI, #sub "::" #name); \
1778 NEWPERFEVENTCOUNTER(_perf_##sub##_##name##_count, SUN_CI, #sub "::" #name "_count");
1779
1780 void InterpreterRuntime::init_counters() {
1781 if (UsePerfData) {
1782 EXCEPTION_MARK;
1783
1784 DO_COUNTERS(INIT_COUNTER)
1785 DO_JVMTI_COUNTERS(INIT_COUNTER)
1786
1787 if (HAS_PENDING_EXCEPTION) {
1788 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
1789 }
1790 }
1791 }
1792 #undef INIT_COUNTER
1793
1794 #define PRINT_COUNTER(sub, name) { \
1795 jlong count = _perf_##sub##_##name##_count->get_value(); \
1796 if (count > 0) { \
1797 st->print_cr(" %-50s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
1798 #sub "::" #name, \
1799 _perf_##sub##_##name##_timer->elapsed_counter_value_us(), \
1800 _perf_##sub##_##name##_timer->thread_counter_value_us(), \
1801 count); \
1802 }}
1803
1804 void InterpreterRuntime::print_counters_on(outputStream* st) {
1805 if (UsePerfData && ProfileRuntimeCalls) {
1806 DO_COUNTERS(PRINT_COUNTER)
1807 DO_JVMTI_COUNTERS(PRINT_COUNTER)
1808 } else {
1809 st->print_cr(" InterpreterRuntime: no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
1810 }
1811 }
1812
1813 #undef PRINT_COUNTER
1814 #undef DO_JVMTI_COUNTERS
1815 #undef DO_COUNTERS
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