9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm_io.h"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/codeCache.hpp"
32 #include "compiler/compilationPolicy.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/disassembler.hpp"
35 #include "gc/shared/barrierSetNMethod.hpp"
36 #include "gc/shared/collectedHeap.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "interpreter/templateTable.hpp"
41 #include "logging/log.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/constantPool.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/objArrayKlass.hpp"
51 #include "oops/objArrayOop.inline.hpp"
52 #include "oops/oop.inline.hpp"
53 #include "oops/symbol.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/methodHandles.hpp"
56 #include "prims/nativeLookup.hpp"
57 #include "runtime/atomic.hpp"
58 #include "runtime/deoptimization.hpp"
59 #include "runtime/fieldDescriptor.inline.hpp"
60 #include "runtime/frame.inline.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/icache.hpp"
63 #include "runtime/interfaceSupport.inline.hpp"
64 #include "runtime/java.hpp"
65 #include "runtime/javaCalls.hpp"
66 #include "runtime/jfieldIDWorkaround.hpp"
67 #include "runtime/osThread.hpp"
68 #include "runtime/sharedRuntime.hpp"
69 #include "runtime/stackWatermarkSet.hpp"
70 #include "runtime/stubRoutines.hpp"
71 #include "runtime/synchronizer.hpp"
72 #include "runtime/threadCritical.hpp"
73 #include "utilities/align.hpp"
74 #include "utilities/copy.hpp"
75 #include "utilities/events.hpp"
76 #ifdef COMPILER2
77 #include "opto/runtime.hpp"
78 #endif
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); }
137 if (mdo != NULL) {
138 NEEDS_CLEANUP;
139 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
140 }
141 }
142 }
143
144 //------------------------------------------------------------------------------------------------------------------------
145 // Constants
146
147
148 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
149 // access constant pool
150 LastFrameAccessor last_frame(current);
151 ConstantPool* pool = last_frame.method()->constants();
152 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
153 constantTag tag = pool->tag_at(index);
154
155 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
156 Klass* klass = pool->klass_at(index, CHECK);
157 oop java_class = klass->java_mirror();
158 current->set_vm_result(java_class);
159 JRT_END
160
161 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
162 assert(bytecode == Bytecodes::_ldc ||
163 bytecode == Bytecodes::_ldc_w ||
164 bytecode == Bytecodes::_ldc2_w ||
165 bytecode == Bytecodes::_fast_aldc ||
166 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
167 ResourceMark rm(current);
168 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
169 bytecode == Bytecodes::_fast_aldc_w);
170 LastFrameAccessor last_frame(current);
171 methodHandle m (current, last_frame.method());
172 Bytecode_loadconstant ldc(m, last_frame.bci());
173
174 // Double-check the size. (Condy can have any type.)
175 BasicType type = ldc.result_type();
176 switch (type2size[type]) {
177 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
201 current->set_vm_result(result);
202 if (!is_fast_aldc) {
203 // Tell the interpreter how to unbox the primitive.
204 guarantee(java_lang_boxing_object::is_instance(result, type), "");
205 int offset = java_lang_boxing_object::value_offset(type);
206 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
207 | (offset & ConstantPoolCacheEntry::field_index_mask));
208 current->set_vm_result_2((Metadata*)flags);
209 }
210 }
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 // At this point the class may not be fully initialized
228 // because of recursive initialization. If it is fully
229 // initialized & has_finalized is not set, we rewrite
230 // it into its fast version (Note: no locking is needed
231 // here since this is an atomic byte write and can be
232 // done more than once).
233 //
234 // Note: In case of classes with has_finalized we don't
235 // rewrite since that saves us an extra check in
236 // the fast version which then would call the
237 // slow version anyway (and do a call back into
238 // Java).
239 // If we have a breakpoint, then we don't rewrite
240 // because the _breakpoint bytecode would be lost.
241 oop obj = klass->allocate_instance(CHECK);
242 current->set_vm_result(obj);
243 JRT_END
244
245
246 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
247 oop obj = oopFactory::new_typeArray(type, size, CHECK);
248 current->set_vm_result(obj);
249 JRT_END
250
251
252 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
253 Klass* klass = pool->klass_at(index, CHECK);
254 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
255 current->set_vm_result(obj);
256 JRT_END
257
258
259 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
260 // We may want to pass in more arguments - could make this slightly faster
261 LastFrameAccessor last_frame(current);
262 ConstantPool* constants = last_frame.method()->constants();
263 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
264 Klass* klass = constants->klass_at(i, CHECK);
265 int nof_dims = last_frame.number_of_dimensions();
266 assert(klass->is_klass(), "not a class");
267 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
268
269 // We must create an array of jints to pass to multi_allocate.
270 ResourceMark rm(current);
271 const int small_dims = 10;
272 jint dim_array[small_dims];
273 jint *dims = &dim_array[0];
274 if (nof_dims > small_dims) {
275 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
276 }
277 for (int index = 0; index < nof_dims; index++) {
278 // offset from first_size_address is addressed as local[index]
279 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
280 dims[index] = first_size_address[n];
281 }
282 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
283 current->set_vm_result(obj);
284 JRT_END
285
286
287 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
288 assert(oopDesc::is_oop(obj), "must be a valid oop");
289 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
290 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
291 JRT_END
292
293
294 // Quicken instance-of and check-cast bytecodes
295 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
296 // Force resolving; quicken the bytecode
297 LastFrameAccessor last_frame(current);
298 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
299 ConstantPool* cpool = last_frame.method()->constants();
300 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
301 // program we might have seen an unquick'd bytecode in the interpreter but have another
302 // thread quicken the bytecode before we get here.
303 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
304 Klass* klass = cpool->klass_at(which, CHECK);
305 current->set_vm_result_2(klass);
306 JRT_END
307
308
309 //------------------------------------------------------------------------------------------------------------------------
310 // Exceptions
311
312 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
599 // and therefore we don't have the receiver object at our fingertips. (Though,
600 // on some platforms the receiver still resides in a register...). Thus,
601 // we have no choice but print an error message not containing the receiver
602 // type.
603 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
604 Method* missingMethod))
605 ResourceMark rm(current);
606 assert(missingMethod != NULL, "sanity");
607 methodHandle m(current, missingMethod);
608 LinkResolver::throw_abstract_method_error(m, THREAD);
609 JRT_END
610
611 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
612 Klass* recvKlass,
613 Method* missingMethod))
614 ResourceMark rm(current);
615 methodHandle mh = methodHandle(current, missingMethod);
616 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
617 JRT_END
618
619
620 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
621 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
622 JRT_END
623
624 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
625 Klass* recvKlass,
626 Klass* interfaceKlass))
627 ResourceMark rm(current);
628 char buf[1000];
629 buf[0] = '\0';
630 jio_snprintf(buf, sizeof(buf),
631 "Class %s does not implement the requested interface %s",
632 recvKlass ? recvKlass->external_name() : "NULL",
633 interfaceKlass ? interfaceKlass->external_name() : "NULL");
634 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
635 JRT_END
636
637 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
638 THROW(vmSymbols::java_lang_NullPointerException());
639 JRT_END
640
641 //------------------------------------------------------------------------------------------------------------------------
642 // Fields
643 //
644
645 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
646 // resolve field
647 fieldDescriptor info;
648 LastFrameAccessor last_frame(current);
649 constantPoolHandle pool(current, last_frame.method()->constants());
650 methodHandle m(current, last_frame.method());
651 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
652 bytecode == Bytecodes::_putstatic);
653 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
654
655 {
656 JvmtiHideSingleStepping jhss(current);
657 JavaThread* THREAD = current; // For exception macros.
658 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
659 m, bytecode, CHECK);
660 } // end JvmtiHideSingleStepping
661
662 // check if link resolution caused cpCache to be updated
663 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
664 if (cp_cache_entry->is_resolved(bytecode)) return;
665
666 // compute auxiliary field attributes
667 TosState state = as_TosState(info.field_type());
668
669 // Resolution of put instructions on final fields is delayed. That is required so that
670 // exceptions are thrown at the correct place (when the instruction is actually invoked).
671 // If we do not resolve an instruction in the current pass, leaving the put_code
672 // set to zero will cause the next put instruction to the same field to reresolve.
673
678 // initializer method <init>. If resolution were not inhibited, a putfield
679 // in an initializer method could be resolved in the initializer. Subsequent
680 // putfield instructions to the same field would then use cached information.
681 // As a result, those instructions would not pass through the VM. That is,
682 // checks in resolve_field_access() would not be executed for those instructions
683 // and the required IllegalAccessError would not be thrown.
684 //
685 // Also, we need to delay resolving getstatic and putstatic instructions until the
686 // class is initialized. This is required so that access to the static
687 // field will call the initialization function every time until the class
688 // is completely initialized ala. in 2.17.5 in JVM Specification.
689 InstanceKlass* klass = info.field_holder();
690 bool uninitialized_static = is_static && !klass->is_initialized();
691 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
692 info.has_initialized_final_update();
693 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
694
695 Bytecodes::Code get_code = (Bytecodes::Code)0;
696 Bytecodes::Code put_code = (Bytecodes::Code)0;
697 if (!uninitialized_static) {
698 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
699 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
700 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
701 }
702 }
703
704 cp_cache_entry->set_field(
705 get_code,
706 put_code,
707 info.field_holder(),
708 info.index(),
709 info.offset(),
710 state,
711 info.access_flags().is_final(),
712 info.access_flags().is_volatile()
713 );
714 }
715
716
717 //------------------------------------------------------------------------------------------------------------------------
718 // Synchronization
719 //
720 // The interpreter's synchronization code is factored out so that it can
721 // be shared by method invocation and synchronized blocks.
722 //%note synchronization_3
723
724 //%note monitor_1
725 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
726 #ifdef ASSERT
727 current->last_frame().interpreter_frame_verify_monitor(elem);
728 #endif
729 Handle h_obj(current, elem->obj());
730 assert(Universe::heap()->is_in_or_null(h_obj()),
731 "must be NULL or an object");
732 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
924 {
925 JvmtiHideSingleStepping jhss(current);
926 JavaThread* THREAD = current; // For exception macros.
927 LinkResolver::resolve_invoke(info, Handle(), pool,
928 index, bytecode, CHECK);
929 } // end JvmtiHideSingleStepping
930
931 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
932 cp_cache_entry->set_dynamic_call(pool, info);
933 }
934
935 // This function is the interface to the assembly code. It returns the resolved
936 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
937 // This function will check for redefinition!
938 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
939 switch (bytecode) {
940 case Bytecodes::_getstatic:
941 case Bytecodes::_putstatic:
942 case Bytecodes::_getfield:
943 case Bytecodes::_putfield:
944 resolve_get_put(current, bytecode);
945 break;
946 case Bytecodes::_invokevirtual:
947 case Bytecodes::_invokespecial:
948 case Bytecodes::_invokestatic:
949 case Bytecodes::_invokeinterface:
950 resolve_invoke(current, bytecode);
951 break;
952 case Bytecodes::_invokehandle:
953 resolve_invokehandle(current);
954 break;
955 case Bytecodes::_invokedynamic:
956 resolve_invokedynamic(current);
957 break;
958 default:
959 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
960 break;
961 }
962 }
963 JRT_END
1121 // This function is called by the interpreter when the return poll found a reason
1122 // to call the VM. The reason could be that we are returning into a not yet safe
1123 // to access frame. We handle that below.
1124 // Note that this path does not check for single stepping, because we do not want
1125 // to single step when unwinding frames for an exception being thrown. Instead,
1126 // such single stepping code will use the safepoint table, which will use the
1127 // InterpreterRuntime::at_safepoint callback.
1128 StackWatermarkSet::before_unwind(current);
1129 JRT_END
1130
1131 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1132 ConstantPoolCacheEntry *cp_entry))
1133
1134 // check the access_flags for the field in the klass
1135
1136 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1137 int index = cp_entry->field_index();
1138 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1139
1140 bool is_static = (obj == NULL);
1141 HandleMark hm(current);
1142
1143 Handle h_obj;
1144 if (!is_static) {
1145 // non-static field accessors have an object, but we need a handle
1146 h_obj = Handle(current, obj);
1147 }
1148 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1149 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1150 LastFrameAccessor last_frame(current);
1151 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1152 JRT_END
1153
1154 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1155 ConstantPoolCacheEntry *cp_entry, jvalue *value))
1156
1157 Klass* k = cp_entry->f1_as_klass();
1158
1159 // check the access_flags for the field in the klass
1160 InstanceKlass* ik = InstanceKlass::cast(k);
1161 int index = cp_entry->field_index();
1162 // bail out if field modifications are not watched
1163 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1164
1165 char sig_type = '\0';
1166
1167 switch(cp_entry->flag_state()) {
1168 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1169 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1170 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1171 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1172 case itos: sig_type = JVM_SIGNATURE_INT; break;
1173 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1174 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1175 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1176 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1177 default: ShouldNotReachHere(); return;
1178 }
1179 bool is_static = (obj == NULL);
1180
1181 HandleMark hm(current);
1182 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1183 jvalue fvalue;
1184 #ifdef _LP64
1185 fvalue = *value;
1186 #else
1187 // Long/double values are stored unaligned and also noncontiguously with
1188 // tagged stacks. We can't just do a simple assignment even in the non-
1189 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1190 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1191 // We assume that the two halves of longs/doubles are stored in interpreter
1192 // stack slots in platform-endian order.
1193 jlong_accessor u;
1194 jint* newval = (jint*)value;
1195 u.words[0] = newval[0];
1196 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1197 fvalue.j = u.long_value;
1198 #endif // _LP64
1199
1200 Handle h_obj;
1201 if (!is_static) {
1202 // non-static field accessors have an object, but we need a handle
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm_io.h"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/codeCache.hpp"
33 #include "compiler/compilationPolicy.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/disassembler.hpp"
36 #include "gc/shared/barrierSetNMethod.hpp"
37 #include "gc/shared/collectedHeap.hpp"
38 #include "interpreter/interpreter.hpp"
39 #include "interpreter/interpreterRuntime.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/templateTable.hpp"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.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/objArrayKlass.hpp"
55 #include "oops/objArrayOop.inline.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/methodHandles.hpp"
60 #include "prims/nativeLookup.hpp"
61 #include "runtime/atomic.hpp"
62 #include "runtime/deoptimization.hpp"
63 #include "runtime/fieldDescriptor.inline.hpp"
64 #include "runtime/frame.inline.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/icache.hpp"
67 #include "runtime/interfaceSupport.inline.hpp"
68 #include "runtime/java.hpp"
69 #include "runtime/javaCalls.hpp"
70 #include "runtime/jfieldIDWorkaround.hpp"
71 #include "runtime/osThread.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/stackWatermarkSet.hpp"
74 #include "runtime/stubRoutines.hpp"
75 #include "runtime/synchronizer.hpp"
76 #include "runtime/threadCritical.hpp"
77 #include "utilities/align.hpp"
78 #include "utilities/copy.hpp"
79 #include "utilities/events.hpp"
80 #include "utilities/globalDefinitions.hpp"
81 #ifdef COMPILER2
82 #include "opto/runtime.hpp"
83 #endif
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); }
142 if (mdo != NULL) {
143 NEEDS_CLEANUP;
144 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
145 }
146 }
147 }
148
149 //------------------------------------------------------------------------------------------------------------------------
150 // Constants
151
152
153 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
154 // access constant pool
155 LastFrameAccessor last_frame(current);
156 ConstantPool* pool = last_frame.method()->constants();
157 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
158 constantTag tag = pool->tag_at(index);
159
160 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
161 Klass* klass = pool->klass_at(index, CHECK);
162 oop java_class = tag.is_Qdescriptor_klass()
163 ? InlineKlass::cast(klass)->val_mirror()
164 : klass->java_mirror();
165 current->set_vm_result(java_class);
166 JRT_END
167
168 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
169 assert(bytecode == Bytecodes::_ldc ||
170 bytecode == Bytecodes::_ldc_w ||
171 bytecode == Bytecodes::_ldc2_w ||
172 bytecode == Bytecodes::_fast_aldc ||
173 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
174 ResourceMark rm(current);
175 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
176 bytecode == Bytecodes::_fast_aldc_w);
177 LastFrameAccessor last_frame(current);
178 methodHandle m (current, last_frame.method());
179 Bytecode_loadconstant ldc(m, last_frame.bci());
180
181 // Double-check the size. (Condy can have any type.)
182 BasicType type = ldc.result_type();
183 switch (type2size[type]) {
184 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
208 current->set_vm_result(result);
209 if (!is_fast_aldc) {
210 // Tell the interpreter how to unbox the primitive.
211 guarantee(java_lang_boxing_object::is_instance(result, type), "");
212 int offset = java_lang_boxing_object::value_offset(type);
213 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
214 | (offset & ConstantPoolCacheEntry::field_index_mask));
215 current->set_vm_result_2((Metadata*)flags);
216 }
217 }
218 JRT_END
219
220
221 //------------------------------------------------------------------------------------------------------------------------
222 // Allocation
223
224 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
225 Klass* k = pool->klass_at(index, CHECK);
226 InstanceKlass* klass = InstanceKlass::cast(k);
227
228 if (klass->is_inline_klass()) {
229 THROW(vmSymbols::java_lang_InstantiationError());
230 }
231
232 // Make sure we are not instantiating an abstract klass
233 klass->check_valid_for_instantiation(true, CHECK);
234
235 // Make sure klass is initialized
236 klass->initialize(CHECK);
237
238 // At this point the class may not be fully initialized
239 // because of recursive initialization. If it is fully
240 // initialized & has_finalized is not set, we rewrite
241 // it into its fast version (Note: no locking is needed
242 // here since this is an atomic byte write and can be
243 // done more than once).
244 //
245 // Note: In case of classes with has_finalized we don't
246 // rewrite since that saves us an extra check in
247 // the fast version which then would call the
248 // slow version anyway (and do a call back into
249 // Java).
250 // If we have a breakpoint, then we don't rewrite
251 // because the _breakpoint bytecode would be lost.
252 oop obj = klass->allocate_instance(CHECK);
253 current->set_vm_result(obj);
254 JRT_END
255
256 JRT_ENTRY(void, InterpreterRuntime::defaultvalue(JavaThread* current, ConstantPool* pool, int index))
257 // Getting the InlineKlass
258 Klass* k = pool->klass_at(index, CHECK);
259 if (!k->is_inline_klass()) {
260 // inconsistency with 'new' which throws an InstantiationError
261 // in the future, defaultvalue will just return null instead of throwing an exception
262 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
263 }
264 assert(k->is_inline_klass(), "defaultvalue argument must be the inline type class");
265 InlineKlass* vklass = InlineKlass::cast(k);
266
267 vklass->initialize(CHECK);
268 oop res = vklass->default_value();
269 current->set_vm_result(res);
270 JRT_END
271
272 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* current, ConstantPoolCacheEntry* cpe, uintptr_t ptr))
273 oop obj = NULL;
274 int recv_offset = type2size[as_BasicType(cpe->flag_state())];
275 assert(frame::interpreter_frame_expression_stack_direction() == -1, "currently is -1 on all platforms");
276 int ret_adj = (recv_offset + type2size[T_OBJECT] )* AbstractInterpreter::stackElementSize;
277 obj = (oopDesc*)(((uintptr_t*)ptr)[recv_offset * Interpreter::stackElementWords]);
278 if (obj == NULL) {
279 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
280 }
281 assert(oopDesc::is_oop(obj), "Verifying receiver");
282 assert(obj->klass()->is_inline_klass(), "Must have been checked during resolution");
283 instanceHandle old_value_h(THREAD, (instanceOop)obj);
284 oop ref = NULL;
285 if (cpe->flag_state() == atos) {
286 ref = *(oopDesc**)ptr;
287 }
288 Handle ref_h(THREAD, ref);
289 InlineKlass* ik = InlineKlass::cast(old_value_h()->klass());
290 instanceOop new_value = ik->allocate_instance_buffer(CHECK_(ret_adj));
291 Handle new_value_h = Handle(THREAD, new_value);
292 ik->inline_copy_oop_to_new_oop(old_value_h(), new_value_h());
293 int offset = cpe->f2_as_offset();
294 switch(cpe->flag_state()) {
295 case ztos:
296 new_value_h()->bool_field_put(offset, (jboolean)(*(jint*)ptr));
297 break;
298 case btos:
299 new_value_h()->byte_field_put(offset, (jbyte)(*(jint*)ptr));
300 break;
301 case ctos:
302 new_value_h()->char_field_put(offset, (jchar)(*(jint*)ptr));
303 break;
304 case stos:
305 new_value_h()->short_field_put(offset, (jshort)(*(jint*)ptr));
306 break;
307 case itos:
308 new_value_h()->int_field_put(offset, (*(jint*)ptr));
309 break;
310 case ltos:
311 new_value_h()->long_field_put(offset, *(jlong*)ptr);
312 break;
313 case ftos:
314 new_value_h()->float_field_put(offset, *(jfloat*)ptr);
315 break;
316 case dtos:
317 new_value_h()->double_field_put(offset, *(jdouble*)ptr);
318 break;
319 case atos:
320 {
321 if (cpe->is_null_free_inline_type()) {
322 if (!cpe->is_inlined()) {
323 if (ref_h() == NULL) {
324 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
325 }
326 new_value_h()->obj_field_put(offset, ref_h());
327 } else {
328 int field_index = cpe->field_index();
329 InlineKlass* field_ik = InlineKlass::cast(ik->get_inline_type_field_klass(field_index));
330 field_ik->write_inlined_field(new_value_h(), offset, ref_h(), CHECK_(ret_adj));
331 }
332 } else {
333 new_value_h()->obj_field_put(offset, ref_h());
334 }
335 }
336 break;
337 default:
338 ShouldNotReachHere();
339 }
340 current->set_vm_result(new_value_h());
341 return ret_adj;
342 JRT_END
343
344 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, int index))
345 // The interpreter tries to access an inline static field that has not been initialized.
346 // This situation can happen in different scenarios:
347 // 1 - if the load or initialization of the field failed during step 8 of
348 // the initialization of the holder of the field, in this case the access to the field
349 // must fail
350 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
351 // another class which accesses this field in its static initializer, in this case the
352 // access must succeed to allow circularity
353 // The code below tries to load and initialize the field's class again before returning the default value.
354 // If the field was not initialized because of an error, a exception should be thrown.
355 // If the class is being initialized, the default value is returned.
356 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
357 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
358 assert(klass->field_signature(index)->is_Q_signature(), "Sanity check");
359 if (klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD)) {
360 int offset = klass->field_offset(index);
361 Klass* field_k = klass->get_inline_type_field_klass_or_null(index);
362 if (field_k == NULL) {
363 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
364 Handle(THREAD, klass->class_loader()),
365 Handle(THREAD, klass->protection_domain()),
366 true, CHECK);
367 assert(field_k != NULL, "Should have been loaded or an exception thrown above");
368 klass->set_inline_type_field_klass(index, field_k);
369 }
370 field_k->initialize(CHECK);
371 oop defaultvalue = InlineKlass::cast(field_k)->default_value();
372 // It is safe to initialized the static field because 1) the current thread is the initializing thread
373 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
374 // otherwise the JVM should not be executing this code.
375 mirror->obj_field_put(offset, defaultvalue);
376 current->set_vm_result(defaultvalue);
377 } else {
378 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
379 ResourceMark rm(THREAD);
380 const char* desc = "Could not initialize class ";
381 const char* className = klass->external_name();
382 size_t msglen = strlen(desc) + strlen(className) + 1;
383 char* message = NEW_RESOURCE_ARRAY(char, msglen);
384 if (NULL == message) {
385 // Out of memory: can't create detailed error message
386 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
387 } else {
388 jio_snprintf(message, msglen, "%s%s", desc, className);
389 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
390 }
391 }
392 JRT_END
393
394 JRT_ENTRY(void, InterpreterRuntime::read_inlined_field(JavaThread* current, oopDesc* obj, int index, Klass* field_holder))
395 Handle obj_h(THREAD, obj);
396
397 assert(oopDesc::is_oop(obj), "Sanity check");
398
399 assert(field_holder->is_instance_klass(), "Sanity check");
400 InstanceKlass* klass = InstanceKlass::cast(field_holder);
401
402 assert(klass->field_is_inlined(index), "Sanity check");
403
404 InlineKlass* field_vklass = InlineKlass::cast(klass->get_inline_type_field_klass(index));
405 assert(field_vklass->is_initialized(), "Must be initialized at this point");
406
407 oop res = field_vklass->read_inlined_field(obj_h(), klass->field_offset(index), CHECK);
408 current->set_vm_result(res);
409 JRT_END
410
411 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
412 oop obj = oopFactory::new_typeArray(type, size, CHECK);
413 current->set_vm_result(obj);
414 JRT_END
415
416
417 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
418 Klass* klass = pool->klass_at(index, CHECK);
419 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
420 arrayOop obj;
421 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
422 klass->initialize(CHECK);
423 obj = oopFactory::new_flatArray(klass, size, CHECK);
424 } else {
425 obj = oopFactory::new_objArray(klass, size, CHECK);
426 }
427 current->set_vm_result(obj);
428 JRT_END
429
430 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* current, arrayOopDesc* array, int index))
431 flatArrayHandle vah(current, (flatArrayOop)array);
432 oop value_holder = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK);
433 current->set_vm_result(value_holder);
434 JRT_END
435
436 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* current, void* val, arrayOopDesc* array, int index))
437 assert(val != NULL, "can't store null into flat array");
438 ((flatArrayOop)array)->value_copy_to_index(cast_to_oop(val), index);
439 JRT_END
440
441 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
442 // We may want to pass in more arguments - could make this slightly faster
443 LastFrameAccessor last_frame(current);
444 ConstantPool* constants = last_frame.method()->constants();
445 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
446 Klass* klass = constants->klass_at(i, CHECK);
447 bool is_qtype = klass->name()->is_Q_array_signature();
448 int nof_dims = last_frame.number_of_dimensions();
449 assert(klass->is_klass(), "not a class");
450 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
451
452 if (is_qtype) { // Logically creates elements, ensure klass init
453 klass->initialize(CHECK);
454 }
455
456 // We must create an array of jints to pass to multi_allocate.
457 ResourceMark rm(current);
458 const int small_dims = 10;
459 jint dim_array[small_dims];
460 jint *dims = &dim_array[0];
461 if (nof_dims > small_dims) {
462 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
463 }
464 for (int index = 0; index < nof_dims; index++) {
465 // offset from first_size_address is addressed as local[index]
466 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
467 dims[index] = first_size_address[n];
468 }
469 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
470 current->set_vm_result(obj);
471 JRT_END
472
473
474 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
475 assert(oopDesc::is_oop(obj), "must be a valid oop");
476 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
477 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
478 JRT_END
479
480 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
481 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
482
483 Handle ha(THREAD, aobj);
484 Handle hb(THREAD, bobj);
485 JavaValue result(T_BOOLEAN);
486 JavaCallArguments args;
487 args.push_oop(ha);
488 args.push_oop(hb);
489 methodHandle method(current, Universe::is_substitutable_method());
490 JavaCalls::call(&result, method, &args, THREAD);
491 if (HAS_PENDING_EXCEPTION) {
492 // Something really bad happened because isSubstitutable() should not throw exceptions
493 // If it is an error, just let it propagate
494 // If it is an exception, wrap it into an InternalError
495 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
496 Handle e(THREAD, PENDING_EXCEPTION);
497 CLEAR_PENDING_EXCEPTION;
498 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
499 }
500 }
501 return result.get_jboolean();
502 JRT_END
503
504 // Quicken instance-of and check-cast bytecodes
505 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
506 // Force resolving; quicken the bytecode
507 LastFrameAccessor last_frame(current);
508 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
509 ConstantPool* cpool = last_frame.method()->constants();
510 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
511 // program we might have seen an unquick'd bytecode in the interpreter but have another
512 // thread quicken the bytecode before we get here.
513 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
514 Klass* klass = cpool->klass_at(which, CHECK);
515 current->set_vm_result_2(klass);
516 JRT_END
517
518
519 //------------------------------------------------------------------------------------------------------------------------
520 // Exceptions
521
522 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
809 // and therefore we don't have the receiver object at our fingertips. (Though,
810 // on some platforms the receiver still resides in a register...). Thus,
811 // we have no choice but print an error message not containing the receiver
812 // type.
813 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
814 Method* missingMethod))
815 ResourceMark rm(current);
816 assert(missingMethod != NULL, "sanity");
817 methodHandle m(current, missingMethod);
818 LinkResolver::throw_abstract_method_error(m, THREAD);
819 JRT_END
820
821 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
822 Klass* recvKlass,
823 Method* missingMethod))
824 ResourceMark rm(current);
825 methodHandle mh = methodHandle(current, missingMethod);
826 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
827 JRT_END
828
829 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
830 THROW(vmSymbols::java_lang_InstantiationError());
831 JRT_END
832
833
834 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
835 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
836 JRT_END
837
838 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
839 Klass* recvKlass,
840 Klass* interfaceKlass))
841 ResourceMark rm(current);
842 char buf[1000];
843 buf[0] = '\0';
844 jio_snprintf(buf, sizeof(buf),
845 "Class %s does not implement the requested interface %s",
846 recvKlass ? recvKlass->external_name() : "NULL",
847 interfaceKlass ? interfaceKlass->external_name() : "NULL");
848 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
849 JRT_END
850
851 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
852 THROW(vmSymbols::java_lang_NullPointerException());
853 JRT_END
854
855 //------------------------------------------------------------------------------------------------------------------------
856 // Fields
857 //
858
859 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
860 // resolve field
861 fieldDescriptor info;
862 LastFrameAccessor last_frame(current);
863 constantPoolHandle pool(current, last_frame.method()->constants());
864 methodHandle m(current, last_frame.method());
865 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
866 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
867 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
868 bool is_inline_type = bytecode == Bytecodes::_withfield;
869
870 {
871 JvmtiHideSingleStepping jhss(current);
872 JavaThread* THREAD = current; // For exception macros.
873 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
874 m, bytecode, CHECK);
875 } // end JvmtiHideSingleStepping
876
877 // check if link resolution caused cpCache to be updated
878 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
879 if (cp_cache_entry->is_resolved(bytecode)) return;
880
881 // compute auxiliary field attributes
882 TosState state = as_TosState(info.field_type());
883
884 // Resolution of put instructions on final fields is delayed. That is required so that
885 // exceptions are thrown at the correct place (when the instruction is actually invoked).
886 // If we do not resolve an instruction in the current pass, leaving the put_code
887 // set to zero will cause the next put instruction to the same field to reresolve.
888
893 // initializer method <init>. If resolution were not inhibited, a putfield
894 // in an initializer method could be resolved in the initializer. Subsequent
895 // putfield instructions to the same field would then use cached information.
896 // As a result, those instructions would not pass through the VM. That is,
897 // checks in resolve_field_access() would not be executed for those instructions
898 // and the required IllegalAccessError would not be thrown.
899 //
900 // Also, we need to delay resolving getstatic and putstatic instructions until the
901 // class is initialized. This is required so that access to the static
902 // field will call the initialization function every time until the class
903 // is completely initialized ala. in 2.17.5 in JVM Specification.
904 InstanceKlass* klass = info.field_holder();
905 bool uninitialized_static = is_static && !klass->is_initialized();
906 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
907 info.has_initialized_final_update();
908 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
909
910 Bytecodes::Code get_code = (Bytecodes::Code)0;
911 Bytecodes::Code put_code = (Bytecodes::Code)0;
912 if (!uninitialized_static) {
913 if (is_static) {
914 get_code = Bytecodes::_getstatic;
915 } else {
916 get_code = Bytecodes::_getfield;
917 }
918 if (is_put && is_inline_type) {
919 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
920 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
921 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
922 }
923 }
924
925 cp_cache_entry->set_field(
926 get_code,
927 put_code,
928 info.field_holder(),
929 info.index(),
930 info.offset(),
931 state,
932 info.access_flags().is_final(),
933 info.access_flags().is_volatile(),
934 info.is_inlined(),
935 info.signature()->is_Q_signature() && info.is_inline_type()
936 );
937 }
938
939
940 //------------------------------------------------------------------------------------------------------------------------
941 // Synchronization
942 //
943 // The interpreter's synchronization code is factored out so that it can
944 // be shared by method invocation and synchronized blocks.
945 //%note synchronization_3
946
947 //%note monitor_1
948 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
949 #ifdef ASSERT
950 current->last_frame().interpreter_frame_verify_monitor(elem);
951 #endif
952 Handle h_obj(current, elem->obj());
953 assert(Universe::heap()->is_in_or_null(h_obj()),
954 "must be NULL or an object");
955 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
1147 {
1148 JvmtiHideSingleStepping jhss(current);
1149 JavaThread* THREAD = current; // For exception macros.
1150 LinkResolver::resolve_invoke(info, Handle(), pool,
1151 index, bytecode, CHECK);
1152 } // end JvmtiHideSingleStepping
1153
1154 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1155 cp_cache_entry->set_dynamic_call(pool, info);
1156 }
1157
1158 // This function is the interface to the assembly code. It returns the resolved
1159 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1160 // This function will check for redefinition!
1161 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1162 switch (bytecode) {
1163 case Bytecodes::_getstatic:
1164 case Bytecodes::_putstatic:
1165 case Bytecodes::_getfield:
1166 case Bytecodes::_putfield:
1167 case Bytecodes::_withfield:
1168 resolve_get_put(current, bytecode);
1169 break;
1170 case Bytecodes::_invokevirtual:
1171 case Bytecodes::_invokespecial:
1172 case Bytecodes::_invokestatic:
1173 case Bytecodes::_invokeinterface:
1174 resolve_invoke(current, bytecode);
1175 break;
1176 case Bytecodes::_invokehandle:
1177 resolve_invokehandle(current);
1178 break;
1179 case Bytecodes::_invokedynamic:
1180 resolve_invokedynamic(current);
1181 break;
1182 default:
1183 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1184 break;
1185 }
1186 }
1187 JRT_END
1345 // This function is called by the interpreter when the return poll found a reason
1346 // to call the VM. The reason could be that we are returning into a not yet safe
1347 // to access frame. We handle that below.
1348 // Note that this path does not check for single stepping, because we do not want
1349 // to single step when unwinding frames for an exception being thrown. Instead,
1350 // such single stepping code will use the safepoint table, which will use the
1351 // InterpreterRuntime::at_safepoint callback.
1352 StackWatermarkSet::before_unwind(current);
1353 JRT_END
1354
1355 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1356 ConstantPoolCacheEntry *cp_entry))
1357
1358 // check the access_flags for the field in the klass
1359
1360 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1361 int index = cp_entry->field_index();
1362 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1363
1364 bool is_static = (obj == NULL);
1365 bool is_inlined = cp_entry->is_inlined();
1366 HandleMark hm(current);
1367
1368 Handle h_obj;
1369 if (!is_static) {
1370 // non-static field accessors have an object, but we need a handle
1371 h_obj = Handle(current, obj);
1372 }
1373 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1374 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static, is_inlined);
1375 LastFrameAccessor last_frame(current);
1376 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1377 JRT_END
1378
1379 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1380 ConstantPoolCacheEntry *cp_entry, jvalue *value))
1381
1382 Klass* k = cp_entry->f1_as_klass();
1383
1384 // check the access_flags for the field in the klass
1385 InstanceKlass* ik = InstanceKlass::cast(k);
1386 int index = cp_entry->field_index();
1387 // bail out if field modifications are not watched
1388 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1389
1390 char sig_type = '\0';
1391
1392 switch(cp_entry->flag_state()) {
1393 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1394 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1395 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1396 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1397 case itos: sig_type = JVM_SIGNATURE_INT; break;
1398 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1399 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1400 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1401 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1402 default: ShouldNotReachHere(); return;
1403 }
1404
1405 // Both Q-signatures and L-signatures are mapped to atos
1406 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1407 sig_type = JVM_SIGNATURE_INLINE_TYPE;
1408 }
1409
1410 bool is_static = (obj == NULL);
1411 bool is_inlined = cp_entry->is_inlined();
1412
1413 HandleMark hm(current);
1414 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static, is_inlined);
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
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