7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compilationPolicy.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/interpreterRuntime.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "interpreter/templateTable.hpp"
40 #include "jvm_io.h"
41 #include "logging/log.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/constantPool.inline.hpp"
46 #include "oops/cpCache.inline.hpp"
47 #include "oops/instanceKlass.inline.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "oops/methodData.hpp"
50 #include "oops/method.inline.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/atomic.hpp"
59 #include "runtime/continuation.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stackWatermarkSet.hpp"
72 #include "runtime/stubRoutines.hpp"
73 #include "runtime/synchronizer.inline.hpp"
74 #include "runtime/threadCritical.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/checkedCast.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/events.hpp"
79
80 // Helper class to access current interpreter state
81 class LastFrameAccessor : public StackObj {
82 frame _last_frame;
83 public:
84 LastFrameAccessor(JavaThread* current) {
85 assert(current == Thread::current(), "sanity");
86 _last_frame = current->last_frame();
87 }
88 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
89 Method* method() const { return _last_frame.interpreter_frame_method(); }
90 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
91 int bci() const { return _last_frame.interpreter_frame_bci(); }
92 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
93
94 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
95 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
96
97 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
98 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
206 JRT_END
207
208
209 //------------------------------------------------------------------------------------------------------------------------
210 // Allocation
211
212 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
213 Klass* k = pool->klass_at(index, CHECK);
214 InstanceKlass* klass = InstanceKlass::cast(k);
215
216 // Make sure we are not instantiating an abstract klass
217 klass->check_valid_for_instantiation(true, CHECK);
218
219 // Make sure klass is initialized
220 klass->initialize(CHECK);
221
222 oop obj = klass->allocate_instance(CHECK);
223 current->set_vm_result(obj);
224 JRT_END
225
226
227 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
228 oop obj = oopFactory::new_typeArray(type, size, CHECK);
229 current->set_vm_result(obj);
230 JRT_END
231
232
233 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
234 Klass* klass = pool->klass_at(index, CHECK);
235 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
236 current->set_vm_result(obj);
237 JRT_END
238
239
240 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
241 // We may want to pass in more arguments - could make this slightly faster
242 LastFrameAccessor last_frame(current);
243 ConstantPool* constants = last_frame.method()->constants();
244 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
245 Klass* klass = constants->klass_at(i, CHECK);
246 int nof_dims = last_frame.number_of_dimensions();
247 assert(klass->is_klass(), "not a class");
248 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
249
250 // We must create an array of jints to pass to multi_allocate.
251 ResourceMark rm(current);
252 const int small_dims = 10;
253 jint dim_array[small_dims];
254 jint *dims = &dim_array[0];
255 if (nof_dims > small_dims) {
256 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
257 }
258 for (int index = 0; index < nof_dims; index++) {
259 // offset from first_size_address is addressed as local[index]
260 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
261 dims[index] = first_size_address[n];
262 }
263 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
264 current->set_vm_result(obj);
265 JRT_END
266
267
268 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
269 assert(oopDesc::is_oop(obj), "must be a valid oop");
270 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
271 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
272 JRT_END
273
274
275 // Quicken instance-of and check-cast bytecodes
276 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
277 // Force resolving; quicken the bytecode
278 LastFrameAccessor last_frame(current);
279 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
280 ConstantPool* cpool = last_frame.method()->constants();
281 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
282 // program we might have seen an unquick'd bytecode in the interpreter but have another
283 // thread quicken the bytecode before we get here.
284 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
285 Klass* klass = cpool->klass_at(which, CHECK);
286 current->set_vm_result_2(klass);
287 JRT_END
288
289
290 //------------------------------------------------------------------------------------------------------------------------
291 // Exceptions
292
293 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
597 // and therefore we don't have the receiver object at our fingertips. (Though,
598 // on some platforms the receiver still resides in a register...). Thus,
599 // we have no choice but print an error message not containing the receiver
600 // type.
601 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
602 Method* missingMethod))
603 ResourceMark rm(current);
604 assert(missingMethod != nullptr, "sanity");
605 methodHandle m(current, missingMethod);
606 LinkResolver::throw_abstract_method_error(m, THREAD);
607 JRT_END
608
609 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
610 Klass* recvKlass,
611 Method* missingMethod))
612 ResourceMark rm(current);
613 methodHandle mh = methodHandle(current, missingMethod);
614 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
615 JRT_END
616
617
618 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
619 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
620 JRT_END
621
622 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
623 Klass* recvKlass,
624 Klass* interfaceKlass))
625 ResourceMark rm(current);
626 char buf[1000];
627 buf[0] = '\0';
628 jio_snprintf(buf, sizeof(buf),
629 "Class %s does not implement the requested interface %s",
630 recvKlass ? recvKlass->external_name() : "nullptr",
631 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
632 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
633 JRT_END
634
635 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
636 THROW(vmSymbols::java_lang_NullPointerException());
681 // initializer method <init>. If resolution were not inhibited, a putfield
682 // in an initializer method could be resolved in the initializer. Subsequent
683 // putfield instructions to the same field would then use cached information.
684 // As a result, those instructions would not pass through the VM. That is,
685 // checks in resolve_field_access() would not be executed for those instructions
686 // and the required IllegalAccessError would not be thrown.
687 //
688 // Also, we need to delay resolving getstatic and putstatic instructions until the
689 // class is initialized. This is required so that access to the static
690 // field will call the initialization function every time until the class
691 // is completely initialized ala. in 2.17.5 in JVM Specification.
692 InstanceKlass* klass = info.field_holder();
693 bool uninitialized_static = is_static && !klass->is_initialized();
694 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
695 info.has_initialized_final_update();
696 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
697
698 Bytecodes::Code get_code = (Bytecodes::Code)0;
699 Bytecodes::Code put_code = (Bytecodes::Code)0;
700 if (!uninitialized_static) {
701 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
702 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
703 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
704 }
705 }
706
707 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
708 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
709 entry->fill_in(info.field_holder(), info.offset(),
710 checked_cast<u2>(info.index()), checked_cast<u1>(state),
711 static_cast<u1>(get_code), static_cast<u1>(put_code));
712 }
713
714
715 //------------------------------------------------------------------------------------------------------------------------
716 // Synchronization
717 //
718 // The interpreter's synchronization code is factored out so that it can
719 // be shared by method invocation and synchronized blocks.
720 //%note synchronization_3
721
722 //%note monitor_1
723 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
724 #ifdef ASSERT
725 current->last_frame().interpreter_frame_verify_monitor(elem);
726 #endif
727 Handle h_obj(current, elem->obj());
728 assert(Universe::heap()->is_in_or_null(h_obj()),
735 #endif
736 JRT_END
737
738 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
739 oop obj = elem->obj();
740 assert(Universe::heap()->is_in(obj), "must be an object");
741 // The object could become unlocked through a JNI call, which we have no other checks for.
742 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
743 if (obj->is_unlocked()) {
744 if (CheckJNICalls) {
745 fatal("Object has been unlocked by JNI");
746 }
747 return;
748 }
749 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
750 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
751 // again at method exit or in the case of an exception.
752 elem->set_obj(nullptr);
753 JRT_END
754
755
756 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
757 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
758 JRT_END
759
760
761 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
762 // Returns an illegal exception to install into the current thread. The
763 // pending_exception flag is cleared so normal exception handling does not
764 // trigger. Any current installed exception will be overwritten. This
765 // method will be called during an exception unwind.
766
767 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
768 Handle exception(current, current->vm_result());
769 assert(exception() != nullptr, "vm result should be set");
770 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
771 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
772 current->set_vm_result(exception());
773 JRT_END
774
775
776 //------------------------------------------------------------------------------------------------------------------------
777 // Invokes
778
779 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
780 return method->orig_bytecode_at(method->bci_from(bcp));
781 JRT_END
782
783 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
784 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
785 JRT_END
786
787 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
788 JvmtiExport::post_raw_breakpoint(current, method, bcp);
789 JRT_END
790
791 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
792 LastFrameAccessor last_frame(current);
793 // extract receiver from the outgoing argument list if necessary
794 Handle receiver(current, nullptr);
1164 LastFrameAccessor last_frame(current);
1165 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1166 }
1167 JRT_END
1168
1169 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1170 assert(current == JavaThread::current(), "pre-condition");
1171 // This function is called by the interpreter when the return poll found a reason
1172 // to call the VM. The reason could be that we are returning into a not yet safe
1173 // to access frame. We handle that below.
1174 // Note that this path does not check for single stepping, because we do not want
1175 // to single step when unwinding frames for an exception being thrown. Instead,
1176 // such single stepping code will use the safepoint table, which will use the
1177 // InterpreterRuntime::at_safepoint callback.
1178 StackWatermarkSet::before_unwind(current);
1179 JRT_END
1180
1181 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1182 ResolvedFieldEntry *entry))
1183
1184 // check the access_flags for the field in the klass
1185
1186 InstanceKlass* ik = entry->field_holder();
1187 int index = entry->field_index();
1188 if (!ik->field_status(index).is_access_watched()) return;
1189
1190 bool is_static = (obj == nullptr);
1191 HandleMark hm(current);
1192
1193 Handle h_obj;
1194 if (!is_static) {
1195 // non-static field accessors have an object, but we need a handle
1196 h_obj = Handle(current, obj);
1197 }
1198 InstanceKlass* field_holder = entry->field_holder(); // HERE
1199 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1200 LastFrameAccessor last_frame(current);
1201 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1202 JRT_END
1203
1204 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1205 ResolvedFieldEntry *entry, jvalue *value))
1206
1207 InstanceKlass* ik = entry->field_holder();
1208
1209 // check the access_flags for the field in the klass
1210 int index = entry->field_index();
1211 // bail out if field modifications are not watched
1212 if (!ik->field_status(index).is_modification_watched()) return;
1213
1214 char sig_type = '\0';
1215
1216 switch((TosState)entry->tos_state()) {
1217 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1218 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1219 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1220 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1221 case itos: sig_type = JVM_SIGNATURE_INT; break;
1222 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1223 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1224 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1225 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1226 default: ShouldNotReachHere(); return;
1227 }
1228 bool is_static = (obj == nullptr);
1229
1230 HandleMark hm(current);
1231 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1232 jvalue fvalue;
1233 #ifdef _LP64
1234 fvalue = *value;
1235 #else
1236 // Long/double values are stored unaligned and also noncontiguously with
1237 // tagged stacks. We can't just do a simple assignment even in the non-
1238 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1239 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1240 // We assume that the two halves of longs/doubles are stored in interpreter
1241 // stack slots in platform-endian order.
1242 jlong_accessor u;
1243 jint* newval = (jint*)value;
1244 u.words[0] = newval[0];
1245 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1246 fvalue.j = u.long_value;
1247 #endif // _LP64
1248
1249 Handle h_obj;
1250 if (!is_static) {
1251 // non-static field accessors have an object, but we need a handle
|
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compilationPolicy.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/disassembler.hpp"
34 #include "gc/shared/barrierSetNMethod.hpp"
35 #include "gc/shared/collectedHeap.hpp"
36 #include "interpreter/bytecodeTracer.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "interpreter/templateTable.hpp"
41 #include "jvm_io.h"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.inline.hpp"
47 #include "oops/cpCache.inline.hpp"
48 #include "oops/flatArrayKlass.hpp"
49 #include "oops/flatArrayOop.inline.hpp"
50 #include "oops/inlineKlass.inline.hpp"
51 #include "oops/instanceKlass.inline.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/methodData.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/continuation.hpp"
64 #include "runtime/deoptimization.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/frame.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/icache.hpp"
69 #include "runtime/interfaceSupport.inline.hpp"
70 #include "runtime/java.hpp"
71 #include "runtime/javaCalls.hpp"
72 #include "runtime/jfieldIDWorkaround.hpp"
73 #include "runtime/osThread.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.inline.hpp"
78 #include "runtime/threadCritical.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/checkedCast.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/globalDefinitions.hpp"
84
85 // Helper class to access current interpreter state
86 class LastFrameAccessor : public StackObj {
87 frame _last_frame;
88 public:
89 LastFrameAccessor(JavaThread* current) {
90 assert(current == Thread::current(), "sanity");
91 _last_frame = current->last_frame();
92 }
93 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
94 Method* method() const { return _last_frame.interpreter_frame_method(); }
95 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
96 int bci() const { return _last_frame.interpreter_frame_bci(); }
97 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
98
99 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
100 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
101
102 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
103 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
211 JRT_END
212
213
214 //------------------------------------------------------------------------------------------------------------------------
215 // Allocation
216
217 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
218 Klass* k = pool->klass_at(index, CHECK);
219 InstanceKlass* klass = InstanceKlass::cast(k);
220
221 // Make sure we are not instantiating an abstract klass
222 klass->check_valid_for_instantiation(true, CHECK);
223
224 // Make sure klass is initialized
225 klass->initialize(CHECK);
226
227 oop obj = klass->allocate_instance(CHECK);
228 current->set_vm_result(obj);
229 JRT_END
230
231 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, ResolvedFieldEntry* entry))
232 // The interpreter tries to access an inline static field that has not been initialized.
233 // This situation can happen in different scenarios:
234 // 1 - if the load or initialization of the field failed during step 8 of
235 // the initialization of the holder of the field, in this case the access to the field
236 // must fail
237 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
238 // another class which accesses this field in its static initializer, in this case the
239 // access must succeed to allow circularity
240 // The code below tries to load and initialize the field's class again before returning the default value.
241 // If the field was not initialized because of an error, an exception should be thrown.
242 // If the class is being initialized, the default value is returned.
243 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
244 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
245 InstanceKlass* klass = entry->field_holder();
246 u2 index = entry->field_index();
247 assert(klass == java_lang_Class::as_Klass(mirror), "Not the field holder klass");
248 assert(klass->field_is_null_free_inline_type(index), "Sanity check");
249 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) {
250 int offset = klass->field_offset(index);
251 Klass* field_k = klass->get_inline_type_field_klass_or_null(index);
252 if (field_k == nullptr) {
253 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
254 Handle(THREAD, klass->class_loader()),
255 true, CHECK);
256 assert(field_k != nullptr, "Should have been loaded or an exception thrown above");
257 if (!field_k->is_inline_klass()) {
258 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
259 err_msg("class %s expects class %s to be a concrete value class but it is not",
260 klass->name()->as_C_string(), field_k->external_name()));
261 }
262 InlineLayoutInfo* li = klass->inline_layout_info_adr(index);
263 li->set_klass(InlineKlass::cast(field_k));
264 li->set_kind(LayoutKind::REFERENCE);
265 }
266 field_k->initialize(CHECK);
267 oop defaultvalue = InlineKlass::cast(field_k)->default_value();
268 // It is safe to initialize the static field because 1) the current thread is the initializing thread
269 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
270 // otherwise the JVM should not be executing this code.
271 mirror_h()->obj_field_put(offset, defaultvalue);
272 current->set_vm_result(defaultvalue);
273 } else {
274 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
275 ResourceMark rm(THREAD);
276 const char* desc = "Could not initialize class ";
277 const char* className = klass->external_name();
278 size_t msglen = strlen(desc) + strlen(className) + 1;
279 char* message = NEW_RESOURCE_ARRAY(char, msglen);
280 if (nullptr == message) {
281 // Out of memory: can't create detailed error message
282 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
283 } else {
284 jio_snprintf(message, msglen, "%s%s", desc, className);
285 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
286 }
287 }
288 JRT_END
289
290 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
291 assert(oopDesc::is_oop(obj), "Sanity check");
292 Handle obj_h(THREAD, obj);
293
294 InstanceKlass* holder = InstanceKlass::cast(entry->field_holder());
295 assert(entry->field_holder()->field_is_flat(entry->field_index()), "Sanity check");
296
297 InlineLayoutInfo* layout_info = holder->inline_layout_info_adr(entry->field_index());
298 InlineKlass* field_vklass = layout_info->klass();
299
300 #ifdef ASSERT
301 fieldDescriptor fd;
302 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
303 assert(found, "Field not found");
304 assert(fd.is_flat(), "Field must be flat");
305 #endif // ASSERT
306
307 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), layout_info->kind(), CHECK);
308 current->set_vm_result(res);
309 JRT_END
310
311 JRT_ENTRY(void, InterpreterRuntime::read_nullable_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
312 assert(oopDesc::is_oop(obj), "Sanity check");
313 assert(entry->has_null_marker(), "Otherwise should not get there");
314 Handle obj_h(THREAD, obj);
315
316 InstanceKlass* holder = entry->field_holder();
317 int field_index = entry->field_index();
318 InlineLayoutInfo* li= holder->inline_layout_info_adr(field_index);
319
320 #ifdef ASSERT
321 fieldDescriptor fd;
322 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
323 assert(found, "Field not found");
324 assert(fd.is_flat(), "Field must be flat");
325 #endif // ASSERT
326
327 InlineKlass* field_vklass = InlineKlass::cast(li->klass());
328 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), li->kind(), CHECK);
329 current->set_vm_result(res);
330
331 JRT_END
332
333 JRT_ENTRY(void, InterpreterRuntime::write_nullable_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
334 assert(oopDesc::is_oop(obj), "Sanity check");
335 Handle obj_h(THREAD, obj);
336 assert(value == nullptr || oopDesc::is_oop(value), "Sanity check");
337 Handle val_h(THREAD, value);
338
339 InstanceKlass* holder = entry->field_holder();
340 InlineLayoutInfo* li = holder->inline_layout_info_adr(entry->field_index());
341 InlineKlass* vk = li->klass();
342 vk->write_value_to_addr(val_h(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind(), true, CHECK);
343 JRT_END
344
345 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
346 oop obj = oopFactory::new_typeArray(type, size, CHECK);
347 current->set_vm_result(obj);
348 JRT_END
349
350
351 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
352 Klass* klass = pool->klass_at(index, CHECK);
353 arrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
354 current->set_vm_result(obj);
355 JRT_END
356
357 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
358 assert(array->is_flatArray(), "Must be");
359 flatArrayOop farray = (flatArrayOop)array;
360 oop res = farray->read_value_from_flat_array(index, CHECK);
361 current->set_vm_result(res);
362 JRT_END
363
364 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
365 assert(array->is_flatArray(), "Must be");
366 flatArrayOop farray = (flatArrayOop)array;
367 farray->write_value_to_flat_array(val, index, CHECK);
368 JRT_END
369
370 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
371 // We may want to pass in more arguments - could make this slightly faster
372 LastFrameAccessor last_frame(current);
373 ConstantPool* constants = last_frame.method()->constants();
374 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
375 Klass* klass = constants->klass_at(i, CHECK);
376 int nof_dims = last_frame.number_of_dimensions();
377 assert(klass->is_klass(), "not a class");
378 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
379
380 // We must create an array of jints to pass to multi_allocate.
381 ResourceMark rm(current);
382 const int small_dims = 10;
383 jint dim_array[small_dims];
384 jint *dims = &dim_array[0];
385 if (nof_dims > small_dims) {
386 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
387 }
388 for (int index = 0; index < nof_dims; index++) {
389 // offset from first_size_address is addressed as local[index]
390 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
391 dims[index] = first_size_address[n];
392 }
393 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
394 current->set_vm_result(obj);
395 JRT_END
396
397
398 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
399 assert(oopDesc::is_oop(obj), "must be a valid oop");
400 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
401 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
402 JRT_END
403
404 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
405 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
406
407 Handle ha(THREAD, aobj);
408 Handle hb(THREAD, bobj);
409 JavaValue result(T_BOOLEAN);
410 JavaCallArguments args;
411 args.push_oop(ha);
412 args.push_oop(hb);
413 methodHandle method(current, Universe::is_substitutable_method());
414 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
415 JavaCalls::call(&result, method, &args, THREAD);
416 if (HAS_PENDING_EXCEPTION) {
417 // Something really bad happened because isSubstitutable() should not throw exceptions
418 // If it is an error, just let it propagate
419 // If it is an exception, wrap it into an InternalError
420 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
421 Handle e(THREAD, PENDING_EXCEPTION);
422 CLEAR_PENDING_EXCEPTION;
423 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
424 }
425 }
426 return result.get_jboolean();
427 JRT_END
428
429 // Quicken instance-of and check-cast bytecodes
430 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
431 // Force resolving; quicken the bytecode
432 LastFrameAccessor last_frame(current);
433 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
434 ConstantPool* cpool = last_frame.method()->constants();
435 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
436 // program we might have seen an unquick'd bytecode in the interpreter but have another
437 // thread quicken the bytecode before we get here.
438 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
439 Klass* klass = cpool->klass_at(which, CHECK);
440 current->set_vm_result_2(klass);
441 JRT_END
442
443
444 //------------------------------------------------------------------------------------------------------------------------
445 // Exceptions
446
447 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
751 // and therefore we don't have the receiver object at our fingertips. (Though,
752 // on some platforms the receiver still resides in a register...). Thus,
753 // we have no choice but print an error message not containing the receiver
754 // type.
755 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
756 Method* missingMethod))
757 ResourceMark rm(current);
758 assert(missingMethod != nullptr, "sanity");
759 methodHandle m(current, missingMethod);
760 LinkResolver::throw_abstract_method_error(m, THREAD);
761 JRT_END
762
763 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
764 Klass* recvKlass,
765 Method* missingMethod))
766 ResourceMark rm(current);
767 methodHandle mh = methodHandle(current, missingMethod);
768 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
769 JRT_END
770
771 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
772 THROW(vmSymbols::java_lang_InstantiationError());
773 JRT_END
774
775
776 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
777 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
778 JRT_END
779
780 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
781 Klass* recvKlass,
782 Klass* interfaceKlass))
783 ResourceMark rm(current);
784 char buf[1000];
785 buf[0] = '\0';
786 jio_snprintf(buf, sizeof(buf),
787 "Class %s does not implement the requested interface %s",
788 recvKlass ? recvKlass->external_name() : "nullptr",
789 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
790 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
791 JRT_END
792
793 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
794 THROW(vmSymbols::java_lang_NullPointerException());
839 // initializer method <init>. If resolution were not inhibited, a putfield
840 // in an initializer method could be resolved in the initializer. Subsequent
841 // putfield instructions to the same field would then use cached information.
842 // As a result, those instructions would not pass through the VM. That is,
843 // checks in resolve_field_access() would not be executed for those instructions
844 // and the required IllegalAccessError would not be thrown.
845 //
846 // Also, we need to delay resolving getstatic and putstatic instructions until the
847 // class is initialized. This is required so that access to the static
848 // field will call the initialization function every time until the class
849 // is completely initialized ala. in 2.17.5 in JVM Specification.
850 InstanceKlass* klass = info.field_holder();
851 bool uninitialized_static = is_static && !klass->is_initialized();
852 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
853 info.has_initialized_final_update();
854 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
855
856 Bytecodes::Code get_code = (Bytecodes::Code)0;
857 Bytecodes::Code put_code = (Bytecodes::Code)0;
858 if (!uninitialized_static) {
859 if (is_static) {
860 get_code = Bytecodes::_getstatic;
861 } else {
862 get_code = Bytecodes::_getfield;
863 }
864 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
865 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
866 }
867 }
868
869 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
870 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
871 info.is_flat(), info.is_null_free_inline_type(),
872 info.has_null_marker());
873
874 entry->fill_in(info.field_holder(), info.offset(),
875 checked_cast<u2>(info.index()), checked_cast<u1>(state),
876 static_cast<u1>(get_code), static_cast<u1>(put_code));
877 }
878
879
880 //------------------------------------------------------------------------------------------------------------------------
881 // Synchronization
882 //
883 // The interpreter's synchronization code is factored out so that it can
884 // be shared by method invocation and synchronized blocks.
885 //%note synchronization_3
886
887 //%note monitor_1
888 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
889 #ifdef ASSERT
890 current->last_frame().interpreter_frame_verify_monitor(elem);
891 #endif
892 Handle h_obj(current, elem->obj());
893 assert(Universe::heap()->is_in_or_null(h_obj()),
900 #endif
901 JRT_END
902
903 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
904 oop obj = elem->obj();
905 assert(Universe::heap()->is_in(obj), "must be an object");
906 // The object could become unlocked through a JNI call, which we have no other checks for.
907 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
908 if (obj->is_unlocked()) {
909 if (CheckJNICalls) {
910 fatal("Object has been unlocked by JNI");
911 }
912 return;
913 }
914 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
915 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
916 // again at method exit or in the case of an exception.
917 elem->set_obj(nullptr);
918 JRT_END
919
920 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
921 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
922 JRT_END
923
924 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
925 // Returns an illegal exception to install into the current thread. The
926 // pending_exception flag is cleared so normal exception handling does not
927 // trigger. Any current installed exception will be overwritten. This
928 // method will be called during an exception unwind.
929
930 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
931 Handle exception(current, current->vm_result());
932 assert(exception() != nullptr, "vm result should be set");
933 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
934 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
935 current->set_vm_result(exception());
936 JRT_END
937
938 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
939 Klass* klass = cast_to_oop(obj)->klass();
940 ResourceMark rm(THREAD);
941 const char* desc = "Cannot synchronize on an instance of value class ";
942 const char* className = klass->external_name();
943 size_t msglen = strlen(desc) + strlen(className) + 1;
944 char* message = NEW_RESOURCE_ARRAY(char, msglen);
945 if (nullptr == message) {
946 // Out of memory: can't create detailed error message
947 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
948 } else {
949 jio_snprintf(message, msglen, "%s%s", desc, className);
950 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
951 }
952 JRT_END
953
954 //------------------------------------------------------------------------------------------------------------------------
955 // Invokes
956
957 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
958 return method->orig_bytecode_at(method->bci_from(bcp));
959 JRT_END
960
961 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
962 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
963 JRT_END
964
965 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
966 JvmtiExport::post_raw_breakpoint(current, method, bcp);
967 JRT_END
968
969 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
970 LastFrameAccessor last_frame(current);
971 // extract receiver from the outgoing argument list if necessary
972 Handle receiver(current, nullptr);
1342 LastFrameAccessor last_frame(current);
1343 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1344 }
1345 JRT_END
1346
1347 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1348 assert(current == JavaThread::current(), "pre-condition");
1349 // This function is called by the interpreter when the return poll found a reason
1350 // to call the VM. The reason could be that we are returning into a not yet safe
1351 // to access frame. We handle that below.
1352 // Note that this path does not check for single stepping, because we do not want
1353 // to single step when unwinding frames for an exception being thrown. Instead,
1354 // such single stepping code will use the safepoint table, which will use the
1355 // InterpreterRuntime::at_safepoint callback.
1356 StackWatermarkSet::before_unwind(current);
1357 JRT_END
1358
1359 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1360 ResolvedFieldEntry *entry))
1361
1362 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1363 // check the access_flags for the field in the klass
1364
1365 InstanceKlass* ik = entry->field_holder();
1366 int index = entry->field_index();
1367 if (!ik->field_status(index).is_access_watched()) return;
1368
1369 bool is_static = (obj == nullptr);
1370 bool is_flat = entry->is_flat();
1371 HandleMark hm(current);
1372
1373 Handle h_obj;
1374 if (!is_static) {
1375 // non-static field accessors have an object, but we need a handle
1376 h_obj = Handle(current, obj);
1377 }
1378 InstanceKlass* field_holder = entry->field_holder(); // HERE
1379 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1380 LastFrameAccessor last_frame(current);
1381 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1382 JRT_END
1383
1384 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1385 ResolvedFieldEntry *entry, jvalue *value))
1386
1387 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1388 InstanceKlass* ik = entry->field_holder();
1389
1390 // check the access_flags for the field in the klass
1391 int index = entry->field_index();
1392 // bail out if field modifications are not watched
1393 if (!ik->field_status(index).is_modification_watched()) return;
1394
1395 char sig_type = '\0';
1396
1397 switch((TosState)entry->tos_state()) {
1398 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1399 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1400 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1401 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1402 case itos: sig_type = JVM_SIGNATURE_INT; break;
1403 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1404 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1405 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1406 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1407 default: ShouldNotReachHere(); return;
1408 }
1409
1410 bool is_static = (obj == nullptr);
1411 bool is_flat = entry->is_flat();
1412
1413 HandleMark hm(current);
1414 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1415 jvalue fvalue;
1416 #ifdef _LP64
1417 fvalue = *value;
1418 #else
1419 // Long/double values are stored unaligned and also noncontiguously with
1420 // tagged stacks. We can't just do a simple assignment even in the non-
1421 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1422 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1423 // We assume that the two halves of longs/doubles are stored in interpreter
1424 // stack slots in platform-endian order.
1425 jlong_accessor u;
1426 jint* newval = (jint*)value;
1427 u.words[0] = newval[0];
1428 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1429 fvalue.j = u.long_value;
1430 #endif // _LP64
1431
1432 Handle h_obj;
1433 if (!is_static) {
1434 // non-static field accessors have an object, but we need a handle
|