70
71 class UnlockFlagSaver {
72 private:
73 JavaThread* _thread;
74 bool _do_not_unlock;
75 public:
76 UnlockFlagSaver(JavaThread* t) {
77 _thread = t;
78 _do_not_unlock = t->do_not_unlock_if_synchronized();
79 t->set_do_not_unlock_if_synchronized(false);
80 }
81 ~UnlockFlagSaver() {
82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
83 }
84 };
85
86 //------------------------------------------------------------------------------------------------------------------------
87 // State accessors
88
89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
90 last_frame(thread).interpreter_frame_set_bcp(bcp);
91 if (ProfileInterpreter) {
92 // ProfileTraps uses MDOs independently of ProfileInterpreter.
93 // That is why we must check both ProfileInterpreter and mdo != NULL.
94 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
95 if (mdo != NULL) {
96 NEEDS_CLEANUP;
97 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
98 }
99 }
100 }
101
102 //------------------------------------------------------------------------------------------------------------------------
103 // Constants
104
105
106 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
107 // access constant pool
108 ConstantPool* pool = method(thread)->constants();
109 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
110 constantTag tag = pool->tag_at(index);
111
112 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
113 Klass* klass = pool->klass_at(index, CHECK);
114 oop java_class = klass->java_mirror();
115 thread->set_vm_result(java_class);
116 IRT_END
117
118 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
119 assert(bytecode == Bytecodes::_fast_aldc ||
120 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
121 ResourceMark rm(thread);
122 methodHandle m (thread, method(thread));
123 Bytecode_loadconstant ldc(m, bci(thread));
124 oop result = ldc.resolve_constant(CHECK);
125 #ifdef ASSERT
126 {
127 // The bytecode wrappers aren't GC-safe so construct a new one
128 Bytecode_loadconstant ldc2(m, bci(thread));
129 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
130 assert(result == coop, "expected result for assembly code");
131 }
132 #endif
133 thread->set_vm_result(result);
134 }
135 IRT_END
136
137
138 //------------------------------------------------------------------------------------------------------------------------
139 // Allocation
140
141 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
142 Klass* k = pool->klass_at(index, CHECK);
143 InstanceKlass* klass = InstanceKlass::cast(k);
144
145 // Make sure we are not instantiating an abstract klass
146 klass->check_valid_for_instantiation(true, CHECK);
147
148 // Make sure klass is initialized
165 oop obj = klass->allocate_instance(CHECK);
166 thread->set_vm_result(obj);
167 IRT_END
168
169
170 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
171 oop obj = oopFactory::new_typeArray(type, size, CHECK);
172 thread->set_vm_result(obj);
173 IRT_END
174
175
176 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
177 Klass* klass = pool->klass_at(index, CHECK);
178 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
179 thread->set_vm_result(obj);
180 IRT_END
181
182
183 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
184 // We may want to pass in more arguments - could make this slightly faster
185 ConstantPool* constants = method(thread)->constants();
186 int i = get_index_u2(thread, Bytecodes::_multianewarray);
187 Klass* klass = constants->klass_at(i, CHECK);
188 int nof_dims = number_of_dimensions(thread);
189 assert(klass->is_klass(), "not a class");
190 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
191
192 // We must create an array of jints to pass to multi_allocate.
193 ResourceMark rm(thread);
194 const int small_dims = 10;
195 jint dim_array[small_dims];
196 jint *dims = &dim_array[0];
197 if (nof_dims > small_dims) {
198 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
199 }
200 for (int index = 0; index < nof_dims; index++) {
201 // offset from first_size_address is addressed as local[index]
202 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
203 dims[index] = first_size_address[n];
204 }
205 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
206 thread->set_vm_result(obj);
207 IRT_END
208
209
210 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
211 assert(oopDesc::is_oop(obj), "must be a valid oop");
212 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
213 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
214 IRT_END
215
216
217 // Quicken instance-of and check-cast bytecodes
218 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
219 // Force resolving; quicken the bytecode
220 int which = get_index_u2(thread, Bytecodes::_checkcast);
221 ConstantPool* cpool = method(thread)->constants();
222 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
223 // program we might have seen an unquick'd bytecode in the interpreter but have another
224 // thread quicken the bytecode before we get here.
225 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
226 Klass* klass = cpool->klass_at(which, CHECK);
227 thread->set_vm_result_2(klass);
228 IRT_END
229
230
231 //------------------------------------------------------------------------------------------------------------------------
232 // Exceptions
233
234 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
235 const methodHandle& trap_method, int trap_bci, TRAPS) {
236 if (trap_method.not_null()) {
237 MethodData* trap_mdo = trap_method->method_data();
238 if (trap_mdo == NULL) {
239 Method::build_interpreter_method_data(trap_method, THREAD);
240 if (HAS_PENDING_EXCEPTION) {
241 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
242 "we expect only an OOM error here");
243 CLEAR_PENDING_EXCEPTION;
244 }
245 trap_mdo = trap_method->method_data();
246 // and fall through...
247 }
248 if (trap_mdo != NULL) {
249 // Update per-method count of trap events. The interpreter
250 // is updating the MDO to simulate the effect of compiler traps.
251 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
252 }
253 }
254 }
255
256 // Assume the compiler is (or will be) interested in this event.
257 // If necessary, create an MDO to hold the information, and record it.
258 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
259 assert(ProfileTraps, "call me only if profiling");
260 methodHandle trap_method(thread, method(thread));
261 int trap_bci = trap_method->bci_from(bcp(thread));
262 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
263 }
264
265 #ifdef CC_INTERP
266 // As legacy note_trap, but we have more arguments.
267 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
268 methodHandle trap_method(method);
269 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
270 IRT_END
271
272 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
273 // for each exception.
274 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
275 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
276 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
277 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
278 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
279 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
280 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
374 thread, obj->klass());
375
376 if (ProfileTraps) {
377 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
378 }
379
380 // create exception
381 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
382 IRT_END
383
384 // exception_handler_for_exception(...) returns the continuation address,
385 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
386 // The exception oop is returned to make sure it is preserved over GC (it
387 // is only on the stack if the exception was thrown explicitly via athrow).
388 // During this operation, the expression stack contains the values for the
389 // bci where the exception happened. If the exception was propagated back
390 // from a call, the expression stack contains the values for the bci at the
391 // invoke w/o arguments (i.e., as if one were inside the call).
392 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
393
394 Handle h_exception(thread, exception);
395 methodHandle h_method (thread, method(thread));
396 constantPoolHandle h_constants(thread, h_method->constants());
397 bool should_repeat;
398 int handler_bci;
399 int current_bci = bci(thread);
400
401 if (thread->frames_to_pop_failed_realloc() > 0) {
402 // Allocation of scalar replaced object used in this frame
403 // failed. Unconditionally pop the frame.
404 thread->dec_frames_to_pop_failed_realloc();
405 thread->set_vm_result(h_exception());
406 // If the method is synchronized we already unlocked the monitor
407 // during deoptimization so the interpreter needs to skip it when
408 // the frame is popped.
409 thread->set_do_not_unlock_if_synchronized(true);
410 #ifdef CC_INTERP
411 return (address) -1;
412 #else
413 return Interpreter::remove_activation_entry();
414 #endif
415 }
416
417 // Need to do this check first since when _do_not_unlock_if_synchronized
418 // is set, we don't want to trigger any classloading which may make calls
419 // into java, or surprisingly find a matching exception handler for bci 0
476 current_bci = handler_bci;
477 should_repeat = true;
478 }
479 }
480 } while (should_repeat == true);
481
482 #if INCLUDE_JVMCI
483 if (EnableJVMCI && h_method->method_data() != NULL) {
484 ResourceMark rm(thread);
485 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
486 if (pdata != NULL && pdata->is_BitData()) {
487 BitData* bit_data = (BitData*) pdata;
488 bit_data->set_exception_seen();
489 }
490 }
491 #endif
492
493 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
494 // time throw or a stack unwinding throw and accordingly notify the debugger
495 if (JvmtiExport::can_post_on_exceptions()) {
496 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
497 }
498
499 #ifdef CC_INTERP
500 address continuation = (address)(intptr_t) handler_bci;
501 #else
502 address continuation = NULL;
503 #endif
504 address handler_pc = NULL;
505 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
506 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
507 // handler in this method, or (b) after a stack overflow there is not yet
508 // enough stack space available to reprotect the stack.
509 #ifndef CC_INTERP
510 continuation = Interpreter::remove_activation_entry();
511 #endif
512 #if COMPILER2_OR_JVMCI
513 // Count this for compilation purposes
514 h_method->interpreter_throwout_increment(THREAD);
515 #endif
516 } else {
539
540
541 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
542 THROW(vmSymbols::java_lang_AbstractMethodError());
543 IRT_END
544
545
546 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
547 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
548 IRT_END
549
550
551 //------------------------------------------------------------------------------------------------------------------------
552 // Fields
553 //
554
555 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
556 Thread* THREAD = thread;
557 // resolve field
558 fieldDescriptor info;
559 constantPoolHandle pool(thread, method(thread)->constants());
560 methodHandle m(thread, method(thread));
561 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
562 bytecode == Bytecodes::_putstatic);
563 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
564
565 {
566 JvmtiHideSingleStepping jhss(thread);
567 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
568 m, bytecode, CHECK);
569 } // end JvmtiHideSingleStepping
570
571 // check if link resolution caused cpCache to be updated
572 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
573 if (cp_cache_entry->is_resolved(bytecode)) return;
574
575 // compute auxiliary field attributes
576 TosState state = as_TosState(info.field_type());
577
578 // Resolution of put instructions on final fields is delayed. That is required so that
579 // exceptions are thrown at the correct place (when the instruction is actually invoked).
580 // If we do not resolve an instruction in the current pass, leaving the put_code
581 // set to zero will cause the next put instruction to the same field to reresolve.
582
583 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
584 // to final instance fields with updates originating from a method different than <init>)
585 // is inhibited. A putfield instruction targeting an instance final field must throw
586 // an IllegalAccessError if the instruction is not in an instance
587 // initializer method <init>. If resolution were not inhibited, a putfield
588 // in an initializer method could be resolved in the initializer. Subsequent
589 // putfield instructions to the same field would then use cached information.
590 // As a result, those instructions would not pass through the VM. That is,
591 // checks in resolve_field_access() would not be executed for those instructions
592 // and the required IllegalAccessError would not be thrown.
701 IRT_END
702
703
704 //------------------------------------------------------------------------------------------------------------------------
705 // Invokes
706
707 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
708 return method->orig_bytecode_at(method->bci_from(bcp));
709 IRT_END
710
711 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
712 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
713 IRT_END
714
715 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
716 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
717 IRT_END
718
719 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
720 Thread* THREAD = thread;
721 // extract receiver from the outgoing argument list if necessary
722 Handle receiver(thread, NULL);
723 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
724 bytecode == Bytecodes::_invokespecial) {
725 ResourceMark rm(thread);
726 methodHandle m (thread, method(thread));
727 Bytecode_invoke call(m, bci(thread));
728 Symbol* signature = call.signature();
729 receiver = Handle(thread,
730 thread->last_frame().interpreter_callee_receiver(signature));
731 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
732 "sanity check");
733 assert(receiver.is_null() ||
734 !Universe::heap()->is_in_reserved(receiver->klass()),
735 "sanity check");
736 }
737
738 // resolve method
739 CallInfo info;
740 constantPoolHandle pool(thread, method(thread)->constants());
741
742 {
743 JvmtiHideSingleStepping jhss(thread);
744 LinkResolver::resolve_invoke(info, receiver, pool,
745 get_index_u2_cpcache(thread, bytecode), bytecode,
746 CHECK);
747 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
748 int retry_count = 0;
749 while (info.resolved_method()->is_old()) {
750 // It is very unlikely that method is redefined more than 100 times
751 // in the middle of resolve. If it is looping here more than 100 times
752 // means then there could be a bug here.
753 guarantee((retry_count++ < 100),
754 "Could not resolve to latest version of redefined method");
755 // method is redefined in the middle of resolve so re-try.
756 LinkResolver::resolve_invoke(info, receiver, pool,
757 get_index_u2_cpcache(thread, bytecode), bytecode,
758 CHECK);
759 }
760 }
761 } // end JvmtiHideSingleStepping
762
763 // check if link resolution caused cpCache to be updated
764 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
765 if (cp_cache_entry->is_resolved(bytecode)) return;
766
767 #ifdef ASSERT
768 if (bytecode == Bytecodes::_invokeinterface) {
769 if (info.resolved_method()->method_holder() ==
770 SystemDictionary::Object_klass()) {
771 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
772 // (see also CallInfo::set_interface for details)
773 assert(info.call_kind() == CallInfo::vtable_call ||
774 info.call_kind() == CallInfo::direct_call, "");
775 methodHandle rm = info.resolved_method();
776 assert(rm->is_final() || info.has_vtable_index(),
777 "should have been set already");
778 } else if (!info.resolved_method()->has_itable_index()) {
779 // Resolved something like CharSequence.toString. Use vtable not itable.
780 assert(info.call_kind() != CallInfo::itable_call, "");
781 } else {
782 // Setup itable entry
783 assert(info.call_kind() == CallInfo::itable_call, "");
784 int index = info.resolved_method()->itable_index();
808 cp_cache_entry->set_vtable_call(
809 bytecode,
810 info.resolved_method(),
811 info.vtable_index());
812 break;
813 case CallInfo::itable_call:
814 cp_cache_entry->set_itable_call(
815 bytecode,
816 info.resolved_method(),
817 info.itable_index());
818 break;
819 default: ShouldNotReachHere();
820 }
821 }
822
823
824 // First time execution: Resolve symbols, create a permanent MethodType object.
825 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
826 Thread* THREAD = thread;
827 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
828
829 // resolve method
830 CallInfo info;
831 constantPoolHandle pool(thread, method(thread)->constants());
832 {
833 JvmtiHideSingleStepping jhss(thread);
834 LinkResolver::resolve_invoke(info, Handle(), pool,
835 get_index_u2_cpcache(thread, bytecode), bytecode,
836 CHECK);
837 } // end JvmtiHideSingleStepping
838
839 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
840 cp_cache_entry->set_method_handle(pool, info);
841 }
842
843 // First time execution: Resolve symbols, create a permanent CallSite object.
844 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
845 Thread* THREAD = thread;
846 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
847
848 //TO DO: consider passing BCI to Java.
849 // int caller_bci = method(thread)->bci_from(bcp(thread));
850
851 // resolve method
852 CallInfo info;
853 constantPoolHandle pool(thread, method(thread)->constants());
854 int index = get_index_u4(thread, bytecode);
855 {
856 JvmtiHideSingleStepping jhss(thread);
857 LinkResolver::resolve_invoke(info, Handle(), pool,
858 index, bytecode, CHECK);
859 } // end JvmtiHideSingleStepping
860
861 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
862 cp_cache_entry->set_dynamic_call(pool, info);
863 }
864
865 // This function is the interface to the assembly code. It returns the resolved
866 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
867 // This function will check for redefinition!
868 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
869 switch (bytecode) {
870 case Bytecodes::_getstatic:
871 case Bytecodes::_putstatic:
872 case Bytecodes::_getfield:
873 case Bytecodes::_putfield:
874 resolve_get_put(thread, bytecode);
888 default:
889 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
890 break;
891 }
892 }
893 IRT_END
894
895 //------------------------------------------------------------------------------------------------------------------------
896 // Miscellaneous
897
898
899 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
900 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
901 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
902 if (branch_bcp != NULL && nm != NULL) {
903 // This was a successful request for an OSR nmethod. Because
904 // frequency_counter_overflow_inner ends with a safepoint check,
905 // nm could have been unloaded so look it up again. It's unsafe
906 // to examine nm directly since it might have been freed and used
907 // for something else.
908 frame fr = thread->last_frame();
909 Method* method = fr.interpreter_frame_method();
910 int bci = method->bci_from(fr.interpreter_frame_bcp());
911 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
912 }
913 #ifndef PRODUCT
914 if (TraceOnStackReplacement) {
915 if (nm != NULL) {
916 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
917 nm->print();
918 }
919 }
920 #endif
921 return nm;
922 }
923
924 IRT_ENTRY(nmethod*,
925 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
926 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
927 // flag, in case this method triggers classloading which will call into Java.
928 UnlockFlagSaver fs(thread);
929
930 frame fr = thread->last_frame();
931 assert(fr.is_interpreted_frame(), "must come from interpreter");
932 methodHandle method(thread, fr.interpreter_frame_method());
933 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
934 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
935
936 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
937 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
938 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
939
940 if (osr_nm != NULL) {
941 // We may need to do on-stack replacement which requires that no
942 // monitors in the activation are biased because their
943 // BasicObjectLocks will need to migrate during OSR. Force
944 // unbiasing of all monitors in the activation now (even though
945 // the OSR nmethod might be invalidated) because we don't have a
946 // safepoint opportunity later once the migration begins.
947 if (UseBiasedLocking) {
948 ResourceMark rm;
949 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
950 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
951 kptr < fr.interpreter_frame_monitor_begin();
952 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
953 if( kptr->obj() != NULL ) {
954 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
955 }
956 }
957 BiasedLocking::revoke(objects_to_revoke);
958 }
959 }
960 return osr_nm;
961 IRT_END
962
963 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
964 assert(ProfileInterpreter, "must be profiling interpreter");
965 int bci = method->bci_from(cur_bcp);
966 MethodData* mdo = method->method_data();
967 if (mdo == NULL) return 0;
968 return mdo->bci_to_di(bci);
969 IRT_END
970
971 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
972 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
973 // flag, in case this method triggers classloading which will call into Java.
974 UnlockFlagSaver fs(thread);
975
976 assert(ProfileInterpreter, "must be profiling interpreter");
977 frame fr = thread->last_frame();
978 assert(fr.is_interpreted_frame(), "must come from interpreter");
979 methodHandle method(thread, fr.interpreter_frame_method());
980 Method::build_interpreter_method_data(method, THREAD);
981 if (HAS_PENDING_EXCEPTION) {
982 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
983 CLEAR_PENDING_EXCEPTION;
984 // and fall through...
985 }
986 IRT_END
987
988
989 #ifdef ASSERT
990 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
991 assert(ProfileInterpreter, "must be profiling interpreter");
992
993 MethodData* mdo = method->method_data();
994 assert(mdo != NULL, "must not be null");
995
996 int bci = method->bci_from(bcp);
997
998 address mdp2 = mdo->bci_to_dp(bci);
999 if (mdp != mdp2) {
1004 int current_di = mdo->dp_to_di(mdp);
1005 int expected_di = mdo->dp_to_di(mdp2);
1006 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1007 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1008 int approx_bci = -1;
1009 if (current_di >= 0) {
1010 approx_bci = mdo->data_at(current_di)->bci();
1011 }
1012 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1013 mdo->print_on(tty);
1014 method->print_codes();
1015 }
1016 assert(mdp == mdp2, "wrong mdp");
1017 IRT_END
1018 #endif // ASSERT
1019
1020 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1021 assert(ProfileInterpreter, "must be profiling interpreter");
1022 ResourceMark rm(thread);
1023 HandleMark hm(thread);
1024 frame fr = thread->last_frame();
1025 assert(fr.is_interpreted_frame(), "must come from interpreter");
1026 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1027
1028 // Grab a lock to ensure atomic access to setting the return bci and
1029 // the displacement. This can block and GC, invalidating all naked oops.
1030 MutexLocker ml(RetData_lock);
1031
1032 // ProfileData is essentially a wrapper around a derived oop, so we
1033 // need to take the lock before making any ProfileData structures.
1034 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1035 guarantee(data != NULL, "profile data must be valid");
1036 RetData* rdata = data->as_RetData();
1037 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1038 fr.interpreter_frame_set_mdp(new_mdp);
1039 IRT_END
1040
1041 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1042 MethodCounters* mcs = Method::build_method_counters(m, thread);
1043 if (HAS_PENDING_EXCEPTION) {
1044 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1045 CLEAR_PENDING_EXCEPTION;
1046 }
1047 return mcs;
1048 IRT_END
1049
1050
1051 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1052 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1053 // stack traversal automatically takes care of preserving arguments for invoke, so
1054 // this is no longer needed.
1055
1056 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1057 // if this is called during a safepoint
1058
1059 if (JvmtiExport::should_post_single_step()) {
1060 // We are called during regular safepoints and when the VM is
1061 // single stepping. If any thread is marked for single stepping,
1062 // then we may have JVMTI work to do.
1063 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1064 }
1065 IRT_END
1066
1067 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1068 ConstantPoolCacheEntry *cp_entry))
1069
1070 // check the access_flags for the field in the klass
1071
1072 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1073 int index = cp_entry->field_index();
1074 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1075
1076 bool is_static = (obj == NULL);
1077 HandleMark hm(thread);
1078
1079 Handle h_obj;
1080 if (!is_static) {
1081 // non-static field accessors have an object, but we need a handle
1082 h_obj = Handle(thread, obj);
1083 }
1084 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1085 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1086 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), cp_entry_f1, h_obj, fid);
1087 IRT_END
1088
1089 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1090 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1091
1092 Klass* k = cp_entry->f1_as_klass();
1093
1094 // check the access_flags for the field in the klass
1095 InstanceKlass* ik = InstanceKlass::cast(k);
1096 int index = cp_entry->field_index();
1097 // bail out if field modifications are not watched
1098 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1099
1100 char sig_type = '\0';
1101
1102 switch(cp_entry->flag_state()) {
1103 case btos: sig_type = 'B'; break;
1104 case ztos: sig_type = 'Z'; break;
1105 case ctos: sig_type = 'C'; break;
1106 case stos: sig_type = 'S'; break;
1121 #else
1122 // Long/double values are stored unaligned and also noncontiguously with
1123 // tagged stacks. We can't just do a simple assignment even in the non-
1124 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1125 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1126 // We assume that the two halves of longs/doubles are stored in interpreter
1127 // stack slots in platform-endian order.
1128 jlong_accessor u;
1129 jint* newval = (jint*)value;
1130 u.words[0] = newval[0];
1131 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1132 fvalue.j = u.long_value;
1133 #endif // _LP64
1134
1135 Handle h_obj;
1136 if (!is_static) {
1137 // non-static field accessors have an object, but we need a handle
1138 h_obj = Handle(thread, obj);
1139 }
1140
1141 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), ik, h_obj,
1142 fid, sig_type, &fvalue);
1143 IRT_END
1144
1145 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1146 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1147 IRT_END
1148
1149
1150 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1151 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1152 IRT_END
1153
1154 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1155 {
1156 return (Interpreter::contains(pc) ? 1 : 0);
1157 }
1158 IRT_END
1159
1160
1161 // Implementation of SignatureHandlerLibrary
1162
1163 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1164 // Dummy definition (else normalization method is defined in CPU
1165 // dependant code)
1166 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1167 return fingerprint;
1168 }
1169 #endif
1170
1171 address SignatureHandlerLibrary::set_handler_blob() {
1355 bool in_base_library;
1356 if (!m->has_native_function()) {
1357 NativeLookup::lookup(m, in_base_library, CHECK);
1358 }
1359 // make sure signature handler is installed
1360 SignatureHandlerLibrary::add(m);
1361 // The interpreter entry point checks the signature handler first,
1362 // before trying to fetch the native entry point and klass mirror.
1363 // We must set the signature handler last, so that multiple processors
1364 // preparing the same method will be sure to see non-null entry & mirror.
1365 IRT_END
1366
1367 #if defined(IA32) || defined(AMD64) || defined(ARM)
1368 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1369 if (src_address == dest_address) {
1370 return;
1371 }
1372 ResetNoHandleMark rnm; // In a LEAF entry.
1373 HandleMark hm;
1374 ResourceMark rm;
1375 frame fr = thread->last_frame();
1376 assert(fr.is_interpreted_frame(), "");
1377 jint bci = fr.interpreter_frame_bci();
1378 methodHandle mh(thread, fr.interpreter_frame_method());
1379 Bytecode_invoke invoke(mh, bci);
1380 ArgumentSizeComputer asc(invoke.signature());
1381 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1382 Copy::conjoint_jbytes(src_address, dest_address,
1383 size_of_arguments * Interpreter::stackElementSize);
1384 IRT_END
1385 #endif
1386
1387 #if INCLUDE_JVMTI
1388 // This is a support of the JVMTI PopFrame interface.
1389 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1390 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1391 // The member_name argument is a saved reference (in local#0) to the member_name.
1392 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1393 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1394 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1395 Method* method, address bcp))
1396 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1397 if (code != Bytecodes::_invokestatic) {
1398 return;
1404
1405 if (MethodHandles::has_member_arg(cname, mname)) {
1406 oop member_name_oop = (oop) member_name;
1407 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1408 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1409 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1410 }
1411 thread->set_vm_result(member_name_oop);
1412 } else {
1413 thread->set_vm_result(NULL);
1414 }
1415 IRT_END
1416 #endif // INCLUDE_JVMTI
1417
1418 #ifndef PRODUCT
1419 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1420 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1421 // The generated code still uses call_VM because that will set up the frame pointer for
1422 // bcp and method.
1423 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1424 const frame f = thread->last_frame();
1425 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1426 methodHandle mh(thread, f.interpreter_frame_method());
1427 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1428 return preserve_this_value;
1429 IRT_END
1430 #endif // !PRODUCT
|
70
71 class UnlockFlagSaver {
72 private:
73 JavaThread* _thread;
74 bool _do_not_unlock;
75 public:
76 UnlockFlagSaver(JavaThread* t) {
77 _thread = t;
78 _do_not_unlock = t->do_not_unlock_if_synchronized();
79 t->set_do_not_unlock_if_synchronized(false);
80 }
81 ~UnlockFlagSaver() {
82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
83 }
84 };
85
86 //------------------------------------------------------------------------------------------------------------------------
87 // State accessors
88
89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
90 LastFrameAccessor last_frame(thread);
91 last_frame.set_bcp(bcp);
92 if (ProfileInterpreter) {
93 // ProfileTraps uses MDOs independently of ProfileInterpreter.
94 // That is why we must check both ProfileInterpreter and mdo != NULL.
95 MethodData* mdo = last_frame.method()->method_data();
96 if (mdo != NULL) {
97 NEEDS_CLEANUP;
98 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
99 }
100 }
101 }
102
103 //------------------------------------------------------------------------------------------------------------------------
104 // Constants
105
106
107 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
108 // access constant pool
109 LastFrameAccessor last_frame(thread);
110 ConstantPool* pool = last_frame.method()->constants();
111 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
112 constantTag tag = pool->tag_at(index);
113
114 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
115 Klass* klass = pool->klass_at(index, CHECK);
116 oop java_class = klass->java_mirror();
117 thread->set_vm_result(java_class);
118 IRT_END
119
120 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
121 assert(bytecode == Bytecodes::_fast_aldc ||
122 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
123 ResourceMark rm(thread);
124 LastFrameAccessor last_frame(thread);
125 methodHandle m (thread, last_frame.method());
126 Bytecode_loadconstant ldc(m, last_frame.bci());
127 oop result = ldc.resolve_constant(CHECK);
128 #ifdef ASSERT
129 {
130 // The bytecode wrappers aren't GC-safe so construct a new one
131 Bytecode_loadconstant ldc2(m, last_frame.bci());
132 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
133 assert(result == coop, "expected result for assembly code");
134 }
135 #endif
136 thread->set_vm_result(result);
137 }
138 IRT_END
139
140
141 //------------------------------------------------------------------------------------------------------------------------
142 // Allocation
143
144 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
145 Klass* k = pool->klass_at(index, CHECK);
146 InstanceKlass* klass = InstanceKlass::cast(k);
147
148 // Make sure we are not instantiating an abstract klass
149 klass->check_valid_for_instantiation(true, CHECK);
150
151 // Make sure klass is initialized
168 oop obj = klass->allocate_instance(CHECK);
169 thread->set_vm_result(obj);
170 IRT_END
171
172
173 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
174 oop obj = oopFactory::new_typeArray(type, size, CHECK);
175 thread->set_vm_result(obj);
176 IRT_END
177
178
179 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
180 Klass* klass = pool->klass_at(index, CHECK);
181 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
182 thread->set_vm_result(obj);
183 IRT_END
184
185
186 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
187 // We may want to pass in more arguments - could make this slightly faster
188 LastFrameAccessor last_frame(thread);
189 ConstantPool* constants = last_frame.method()->constants();
190 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
191 Klass* klass = constants->klass_at(i, CHECK);
192 int nof_dims = last_frame.number_of_dimensions();
193 assert(klass->is_klass(), "not a class");
194 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
195
196 // We must create an array of jints to pass to multi_allocate.
197 ResourceMark rm(thread);
198 const int small_dims = 10;
199 jint dim_array[small_dims];
200 jint *dims = &dim_array[0];
201 if (nof_dims > small_dims) {
202 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
203 }
204 for (int index = 0; index < nof_dims; index++) {
205 // offset from first_size_address is addressed as local[index]
206 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
207 dims[index] = first_size_address[n];
208 }
209 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
210 thread->set_vm_result(obj);
211 IRT_END
212
213
214 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
215 assert(oopDesc::is_oop(obj), "must be a valid oop");
216 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
217 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
218 IRT_END
219
220
221 // Quicken instance-of and check-cast bytecodes
222 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
223 // Force resolving; quicken the bytecode
224 LastFrameAccessor last_frame(thread);
225 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
226 ConstantPool* cpool = last_frame.method()->constants();
227 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
228 // program we might have seen an unquick'd bytecode in the interpreter but have another
229 // thread quicken the bytecode before we get here.
230 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
231 Klass* klass = cpool->klass_at(which, CHECK);
232 thread->set_vm_result_2(klass);
233 IRT_END
234
235
236 //------------------------------------------------------------------------------------------------------------------------
237 // Exceptions
238
239 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
240 const methodHandle& trap_method, int trap_bci, TRAPS) {
241 if (trap_method.not_null()) {
242 MethodData* trap_mdo = trap_method->method_data();
243 if (trap_mdo == NULL) {
244 Method::build_interpreter_method_data(trap_method, THREAD);
245 if (HAS_PENDING_EXCEPTION) {
246 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
247 "we expect only an OOM error here");
248 CLEAR_PENDING_EXCEPTION;
249 }
250 trap_mdo = trap_method->method_data();
251 // and fall through...
252 }
253 if (trap_mdo != NULL) {
254 // Update per-method count of trap events. The interpreter
255 // is updating the MDO to simulate the effect of compiler traps.
256 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
257 }
258 }
259 }
260
261 // Assume the compiler is (or will be) interested in this event.
262 // If necessary, create an MDO to hold the information, and record it.
263 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
264 assert(ProfileTraps, "call me only if profiling");
265 LastFrameAccessor last_frame(thread);
266 methodHandle trap_method(thread, last_frame.method());
267 int trap_bci = trap_method->bci_from(last_frame.bcp());
268 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
269 }
270
271 #ifdef CC_INTERP
272 // As legacy note_trap, but we have more arguments.
273 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
274 methodHandle trap_method(method);
275 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
276 IRT_END
277
278 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
279 // for each exception.
280 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
282 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
284 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
285 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
286 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
287 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
380 thread, obj->klass());
381
382 if (ProfileTraps) {
383 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
384 }
385
386 // create exception
387 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
388 IRT_END
389
390 // exception_handler_for_exception(...) returns the continuation address,
391 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
392 // The exception oop is returned to make sure it is preserved over GC (it
393 // is only on the stack if the exception was thrown explicitly via athrow).
394 // During this operation, the expression stack contains the values for the
395 // bci where the exception happened. If the exception was propagated back
396 // from a call, the expression stack contains the values for the bci at the
397 // invoke w/o arguments (i.e., as if one were inside the call).
398 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
399
400 LastFrameAccessor last_frame(thread);
401 Handle h_exception(thread, exception);
402 methodHandle h_method (thread, last_frame.method());
403 constantPoolHandle h_constants(thread, h_method->constants());
404 bool should_repeat;
405 int handler_bci;
406 int current_bci = last_frame.bci();
407
408 if (thread->frames_to_pop_failed_realloc() > 0) {
409 // Allocation of scalar replaced object used in this frame
410 // failed. Unconditionally pop the frame.
411 thread->dec_frames_to_pop_failed_realloc();
412 thread->set_vm_result(h_exception());
413 // If the method is synchronized we already unlocked the monitor
414 // during deoptimization so the interpreter needs to skip it when
415 // the frame is popped.
416 thread->set_do_not_unlock_if_synchronized(true);
417 #ifdef CC_INTERP
418 return (address) -1;
419 #else
420 return Interpreter::remove_activation_entry();
421 #endif
422 }
423
424 // Need to do this check first since when _do_not_unlock_if_synchronized
425 // is set, we don't want to trigger any classloading which may make calls
426 // into java, or surprisingly find a matching exception handler for bci 0
483 current_bci = handler_bci;
484 should_repeat = true;
485 }
486 }
487 } while (should_repeat == true);
488
489 #if INCLUDE_JVMCI
490 if (EnableJVMCI && h_method->method_data() != NULL) {
491 ResourceMark rm(thread);
492 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
493 if (pdata != NULL && pdata->is_BitData()) {
494 BitData* bit_data = (BitData*) pdata;
495 bit_data->set_exception_seen();
496 }
497 }
498 #endif
499
500 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
501 // time throw or a stack unwinding throw and accordingly notify the debugger
502 if (JvmtiExport::can_post_on_exceptions()) {
503 JvmtiExport::post_exception_throw(thread, h_method(), last_frame.bcp(), h_exception());
504 }
505
506 #ifdef CC_INTERP
507 address continuation = (address)(intptr_t) handler_bci;
508 #else
509 address continuation = NULL;
510 #endif
511 address handler_pc = NULL;
512 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
513 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
514 // handler in this method, or (b) after a stack overflow there is not yet
515 // enough stack space available to reprotect the stack.
516 #ifndef CC_INTERP
517 continuation = Interpreter::remove_activation_entry();
518 #endif
519 #if COMPILER2_OR_JVMCI
520 // Count this for compilation purposes
521 h_method->interpreter_throwout_increment(THREAD);
522 #endif
523 } else {
546
547
548 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
549 THROW(vmSymbols::java_lang_AbstractMethodError());
550 IRT_END
551
552
553 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
554 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
555 IRT_END
556
557
558 //------------------------------------------------------------------------------------------------------------------------
559 // Fields
560 //
561
562 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
563 Thread* THREAD = thread;
564 // resolve field
565 fieldDescriptor info;
566 LastFrameAccessor last_frame(thread);
567 constantPoolHandle pool(thread, last_frame.method()->constants());
568 methodHandle m(thread, last_frame.method());
569 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
570 bytecode == Bytecodes::_putstatic);
571 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
572
573 {
574 JvmtiHideSingleStepping jhss(thread);
575 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
576 m, bytecode, CHECK);
577 } // end JvmtiHideSingleStepping
578
579 // check if link resolution caused cpCache to be updated
580 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
581 if (cp_cache_entry->is_resolved(bytecode)) return;
582
583 // compute auxiliary field attributes
584 TosState state = as_TosState(info.field_type());
585
586 // Resolution of put instructions on final fields is delayed. That is required so that
587 // exceptions are thrown at the correct place (when the instruction is actually invoked).
588 // If we do not resolve an instruction in the current pass, leaving the put_code
589 // set to zero will cause the next put instruction to the same field to reresolve.
590
591 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
592 // to final instance fields with updates originating from a method different than <init>)
593 // is inhibited. A putfield instruction targeting an instance final field must throw
594 // an IllegalAccessError if the instruction is not in an instance
595 // initializer method <init>. If resolution were not inhibited, a putfield
596 // in an initializer method could be resolved in the initializer. Subsequent
597 // putfield instructions to the same field would then use cached information.
598 // As a result, those instructions would not pass through the VM. That is,
599 // checks in resolve_field_access() would not be executed for those instructions
600 // and the required IllegalAccessError would not be thrown.
709 IRT_END
710
711
712 //------------------------------------------------------------------------------------------------------------------------
713 // Invokes
714
715 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
716 return method->orig_bytecode_at(method->bci_from(bcp));
717 IRT_END
718
719 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
720 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
721 IRT_END
722
723 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
724 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
725 IRT_END
726
727 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
728 Thread* THREAD = thread;
729 LastFrameAccessor last_frame(thread);
730 // extract receiver from the outgoing argument list if necessary
731 Handle receiver(thread, NULL);
732 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
733 bytecode == Bytecodes::_invokespecial) {
734 ResourceMark rm(thread);
735 methodHandle m (thread, last_frame.method());
736 Bytecode_invoke call(m, last_frame.bci());
737 Symbol* signature = call.signature();
738 receiver = Handle(thread, last_frame.callee_receiver(signature));
739
740 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
741 "sanity check");
742 assert(receiver.is_null() ||
743 !Universe::heap()->is_in_reserved(receiver->klass()),
744 "sanity check");
745 }
746
747 // resolve method
748 CallInfo info;
749 constantPoolHandle pool(thread, last_frame.method()->constants());
750
751 {
752 JvmtiHideSingleStepping jhss(thread);
753 LinkResolver::resolve_invoke(info, receiver, pool,
754 last_frame.get_index_u2_cpcache(bytecode), bytecode,
755 CHECK);
756 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
757 int retry_count = 0;
758 while (info.resolved_method()->is_old()) {
759 // It is very unlikely that method is redefined more than 100 times
760 // in the middle of resolve. If it is looping here more than 100 times
761 // means then there could be a bug here.
762 guarantee((retry_count++ < 100),
763 "Could not resolve to latest version of redefined method");
764 // method is redefined in the middle of resolve so re-try.
765 LinkResolver::resolve_invoke(info, receiver, pool,
766 last_frame.get_index_u2_cpcache(bytecode), bytecode,
767 CHECK);
768 }
769 }
770 } // end JvmtiHideSingleStepping
771
772 // check if link resolution caused cpCache to be updated
773 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
774 if (cp_cache_entry->is_resolved(bytecode)) return;
775
776 #ifdef ASSERT
777 if (bytecode == Bytecodes::_invokeinterface) {
778 if (info.resolved_method()->method_holder() ==
779 SystemDictionary::Object_klass()) {
780 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
781 // (see also CallInfo::set_interface for details)
782 assert(info.call_kind() == CallInfo::vtable_call ||
783 info.call_kind() == CallInfo::direct_call, "");
784 methodHandle rm = info.resolved_method();
785 assert(rm->is_final() || info.has_vtable_index(),
786 "should have been set already");
787 } else if (!info.resolved_method()->has_itable_index()) {
788 // Resolved something like CharSequence.toString. Use vtable not itable.
789 assert(info.call_kind() != CallInfo::itable_call, "");
790 } else {
791 // Setup itable entry
792 assert(info.call_kind() == CallInfo::itable_call, "");
793 int index = info.resolved_method()->itable_index();
817 cp_cache_entry->set_vtable_call(
818 bytecode,
819 info.resolved_method(),
820 info.vtable_index());
821 break;
822 case CallInfo::itable_call:
823 cp_cache_entry->set_itable_call(
824 bytecode,
825 info.resolved_method(),
826 info.itable_index());
827 break;
828 default: ShouldNotReachHere();
829 }
830 }
831
832
833 // First time execution: Resolve symbols, create a permanent MethodType object.
834 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
835 Thread* THREAD = thread;
836 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
837 LastFrameAccessor last_frame(thread);
838
839 // resolve method
840 CallInfo info;
841 constantPoolHandle pool(thread, last_frame.method()->constants());
842 {
843 JvmtiHideSingleStepping jhss(thread);
844 LinkResolver::resolve_invoke(info, Handle(), pool,
845 last_frame.get_index_u2_cpcache(bytecode), bytecode,
846 CHECK);
847 } // end JvmtiHideSingleStepping
848
849 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
850 cp_cache_entry->set_method_handle(pool, info);
851 }
852
853 // First time execution: Resolve symbols, create a permanent CallSite object.
854 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
855 Thread* THREAD = thread;
856 LastFrameAccessor last_frame(thread);
857 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
858
859 //TO DO: consider passing BCI to Java.
860 // int caller_bci = last_frame.method()->bci_from(last_frame.bcp());
861
862 // resolve method
863 CallInfo info;
864 constantPoolHandle pool(thread, last_frame.method()->constants());
865 int index = last_frame.get_index_u4(bytecode);
866 {
867 JvmtiHideSingleStepping jhss(thread);
868 LinkResolver::resolve_invoke(info, Handle(), pool,
869 index, bytecode, CHECK);
870 } // end JvmtiHideSingleStepping
871
872 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
873 cp_cache_entry->set_dynamic_call(pool, info);
874 }
875
876 // This function is the interface to the assembly code. It returns the resolved
877 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
878 // This function will check for redefinition!
879 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
880 switch (bytecode) {
881 case Bytecodes::_getstatic:
882 case Bytecodes::_putstatic:
883 case Bytecodes::_getfield:
884 case Bytecodes::_putfield:
885 resolve_get_put(thread, bytecode);
899 default:
900 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
901 break;
902 }
903 }
904 IRT_END
905
906 //------------------------------------------------------------------------------------------------------------------------
907 // Miscellaneous
908
909
910 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
911 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
912 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
913 if (branch_bcp != NULL && nm != NULL) {
914 // This was a successful request for an OSR nmethod. Because
915 // frequency_counter_overflow_inner ends with a safepoint check,
916 // nm could have been unloaded so look it up again. It's unsafe
917 // to examine nm directly since it might have been freed and used
918 // for something else.
919 LastFrameAccessor last_frame(thread);
920 Method* method = last_frame.method();
921 int bci = method->bci_from(last_frame.bcp());
922 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
923 }
924 #ifndef PRODUCT
925 if (TraceOnStackReplacement) {
926 if (nm != NULL) {
927 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
928 nm->print();
929 }
930 }
931 #endif
932 return nm;
933 }
934
935 IRT_ENTRY(nmethod*,
936 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
937 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
938 // flag, in case this method triggers classloading which will call into Java.
939 UnlockFlagSaver fs(thread);
940
941 LastFrameAccessor last_frame(thread);
942 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
943 methodHandle method(thread, last_frame.method());
944 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
945 const int bci = branch_bcp != NULL ? method->bci_from(last_frame.bcp()) : InvocationEntryBci;
946
947 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
948 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
949 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
950
951 if (osr_nm != NULL) {
952 // We may need to do on-stack replacement which requires that no
953 // monitors in the activation are biased because their
954 // BasicObjectLocks will need to migrate during OSR. Force
955 // unbiasing of all monitors in the activation now (even though
956 // the OSR nmethod might be invalidated) because we don't have a
957 // safepoint opportunity later once the migration begins.
958 if (UseBiasedLocking) {
959 ResourceMark rm;
960 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
961 for( BasicObjectLock *kptr = last_frame.monitor_end();
962 kptr < last_frame.monitor_begin();
963 kptr = last_frame.next_monitor(kptr) ) {
964 if( kptr->obj() != NULL ) {
965 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
966 }
967 }
968 BiasedLocking::revoke(objects_to_revoke);
969 }
970 }
971 return osr_nm;
972 IRT_END
973
974 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
975 assert(ProfileInterpreter, "must be profiling interpreter");
976 int bci = method->bci_from(cur_bcp);
977 MethodData* mdo = method->method_data();
978 if (mdo == NULL) return 0;
979 return mdo->bci_to_di(bci);
980 IRT_END
981
982 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
983 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
984 // flag, in case this method triggers classloading which will call into Java.
985 UnlockFlagSaver fs(thread);
986
987 assert(ProfileInterpreter, "must be profiling interpreter");
988 LastFrameAccessor last_frame(thread);
989 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
990 methodHandle method(thread, last_frame.method());
991 Method::build_interpreter_method_data(method, THREAD);
992 if (HAS_PENDING_EXCEPTION) {
993 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
994 CLEAR_PENDING_EXCEPTION;
995 // and fall through...
996 }
997 IRT_END
998
999
1000 #ifdef ASSERT
1001 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
1002 assert(ProfileInterpreter, "must be profiling interpreter");
1003
1004 MethodData* mdo = method->method_data();
1005 assert(mdo != NULL, "must not be null");
1006
1007 int bci = method->bci_from(bcp);
1008
1009 address mdp2 = mdo->bci_to_dp(bci);
1010 if (mdp != mdp2) {
1015 int current_di = mdo->dp_to_di(mdp);
1016 int expected_di = mdo->dp_to_di(mdp2);
1017 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1018 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1019 int approx_bci = -1;
1020 if (current_di >= 0) {
1021 approx_bci = mdo->data_at(current_di)->bci();
1022 }
1023 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1024 mdo->print_on(tty);
1025 method->print_codes();
1026 }
1027 assert(mdp == mdp2, "wrong mdp");
1028 IRT_END
1029 #endif // ASSERT
1030
1031 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1032 assert(ProfileInterpreter, "must be profiling interpreter");
1033 ResourceMark rm(thread);
1034 HandleMark hm(thread);
1035 LastFrameAccessor last_frame(thread);
1036 assert(last_frame.is_interpreted_frame(), "must come from interpreter");
1037 MethodData* h_mdo = last_frame.method()->method_data();
1038
1039 // Grab a lock to ensure atomic access to setting the return bci and
1040 // the displacement. This can block and GC, invalidating all naked oops.
1041 MutexLocker ml(RetData_lock);
1042
1043 // ProfileData is essentially a wrapper around a derived oop, so we
1044 // need to take the lock before making any ProfileData structures.
1045 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(last_frame.mdp()));
1046 guarantee(data != NULL, "profile data must be valid");
1047 RetData* rdata = data->as_RetData();
1048 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1049 last_frame.set_mdp(new_mdp);
1050 IRT_END
1051
1052 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1053 MethodCounters* mcs = Method::build_method_counters(m, thread);
1054 if (HAS_PENDING_EXCEPTION) {
1055 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1056 CLEAR_PENDING_EXCEPTION;
1057 }
1058 return mcs;
1059 IRT_END
1060
1061
1062 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1063 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1064 // stack traversal automatically takes care of preserving arguments for invoke, so
1065 // this is no longer needed.
1066
1067 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1068 // if this is called during a safepoint
1069
1070 if (JvmtiExport::should_post_single_step()) {
1071 // We are called during regular safepoints and when the VM is
1072 // single stepping. If any thread is marked for single stepping,
1073 // then we may have JVMTI work to do.
1074 LastFrameAccessor last_frame(thread);
1075 JvmtiExport::at_single_stepping_point(thread, last_frame.method(), last_frame.bcp());
1076 }
1077 IRT_END
1078
1079 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1080 ConstantPoolCacheEntry *cp_entry))
1081
1082 // check the access_flags for the field in the klass
1083
1084 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1085 int index = cp_entry->field_index();
1086 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1087
1088 bool is_static = (obj == NULL);
1089 HandleMark hm(thread);
1090
1091 Handle h_obj;
1092 if (!is_static) {
1093 // non-static field accessors have an object, but we need a handle
1094 h_obj = Handle(thread, obj);
1095 }
1096 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1097 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1098 LastFrameAccessor last_frame(thread);
1099 JvmtiExport::post_field_access(thread, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1100 IRT_END
1101
1102 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1103 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1104
1105 Klass* k = cp_entry->f1_as_klass();
1106
1107 // check the access_flags for the field in the klass
1108 InstanceKlass* ik = InstanceKlass::cast(k);
1109 int index = cp_entry->field_index();
1110 // bail out if field modifications are not watched
1111 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1112
1113 char sig_type = '\0';
1114
1115 switch(cp_entry->flag_state()) {
1116 case btos: sig_type = 'B'; break;
1117 case ztos: sig_type = 'Z'; break;
1118 case ctos: sig_type = 'C'; break;
1119 case stos: sig_type = 'S'; break;
1134 #else
1135 // Long/double values are stored unaligned and also noncontiguously with
1136 // tagged stacks. We can't just do a simple assignment even in the non-
1137 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1138 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1139 // We assume that the two halves of longs/doubles are stored in interpreter
1140 // stack slots in platform-endian order.
1141 jlong_accessor u;
1142 jint* newval = (jint*)value;
1143 u.words[0] = newval[0];
1144 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1145 fvalue.j = u.long_value;
1146 #endif // _LP64
1147
1148 Handle h_obj;
1149 if (!is_static) {
1150 // non-static field accessors have an object, but we need a handle
1151 h_obj = Handle(thread, obj);
1152 }
1153
1154 LastFrameAccessor last_frame(thread);
1155 JvmtiExport::post_raw_field_modification(thread, last_frame.method(), last_frame.bcp(), ik, h_obj,
1156 fid, sig_type, &fvalue);
1157 IRT_END
1158
1159 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1160 LastFrameAccessor last_frame(thread);
1161 JvmtiExport::post_method_entry(thread, last_frame.method(), last_frame.get_frame());
1162 IRT_END
1163
1164
1165 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1166 LastFrameAccessor last_frame(thread);
1167 JvmtiExport::post_method_exit(thread, last_frame.method(), last_frame.get_frame());
1168 IRT_END
1169
1170 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1171 {
1172 return (Interpreter::contains(pc) ? 1 : 0);
1173 }
1174 IRT_END
1175
1176
1177 // Implementation of SignatureHandlerLibrary
1178
1179 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1180 // Dummy definition (else normalization method is defined in CPU
1181 // dependant code)
1182 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1183 return fingerprint;
1184 }
1185 #endif
1186
1187 address SignatureHandlerLibrary::set_handler_blob() {
1371 bool in_base_library;
1372 if (!m->has_native_function()) {
1373 NativeLookup::lookup(m, in_base_library, CHECK);
1374 }
1375 // make sure signature handler is installed
1376 SignatureHandlerLibrary::add(m);
1377 // The interpreter entry point checks the signature handler first,
1378 // before trying to fetch the native entry point and klass mirror.
1379 // We must set the signature handler last, so that multiple processors
1380 // preparing the same method will be sure to see non-null entry & mirror.
1381 IRT_END
1382
1383 #if defined(IA32) || defined(AMD64) || defined(ARM)
1384 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1385 if (src_address == dest_address) {
1386 return;
1387 }
1388 ResetNoHandleMark rnm; // In a LEAF entry.
1389 HandleMark hm;
1390 ResourceMark rm;
1391 LastFrameAccessor last_frame(thread);
1392 assert(last_frame.is_interpreted_frame(), "");
1393 jint bci = last_frame.bci();
1394 methodHandle mh(thread, last_frame.method());
1395 Bytecode_invoke invoke(mh, bci);
1396 ArgumentSizeComputer asc(invoke.signature());
1397 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1398 Copy::conjoint_jbytes(src_address, dest_address,
1399 size_of_arguments * Interpreter::stackElementSize);
1400 IRT_END
1401 #endif
1402
1403 #if INCLUDE_JVMTI
1404 // This is a support of the JVMTI PopFrame interface.
1405 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1406 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1407 // The member_name argument is a saved reference (in local#0) to the member_name.
1408 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1409 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1410 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1411 Method* method, address bcp))
1412 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1413 if (code != Bytecodes::_invokestatic) {
1414 return;
1420
1421 if (MethodHandles::has_member_arg(cname, mname)) {
1422 oop member_name_oop = (oop) member_name;
1423 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1424 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1425 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1426 }
1427 thread->set_vm_result(member_name_oop);
1428 } else {
1429 thread->set_vm_result(NULL);
1430 }
1431 IRT_END
1432 #endif // INCLUDE_JVMTI
1433
1434 #ifndef PRODUCT
1435 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1436 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1437 // The generated code still uses call_VM because that will set up the frame pointer for
1438 // bcp and method.
1439 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1440 LastFrameAccessor last_frame(thread);
1441 assert(last_frame.is_interpreted_frame(), "must be an interpreted frame");
1442 methodHandle mh(thread, last_frame.method());
1443 BytecodeTracer::trace(mh, last_frame.bcp(), tos, tos2);
1444 return preserve_this_value;
1445 IRT_END
1446 #endif // !PRODUCT
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