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 "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/symbolTable.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.hpp"
47 #include "oops/cpCache.inline.hpp"
48 #include "oops/instanceKlass.inline.hpp"
49 #include "oops/klass.inline.hpp"
50 #include "oops/methodData.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/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.hpp"
74 #include "runtime/threadCritical.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/copy.hpp"
77 #include "utilities/events.hpp"
78 #ifdef COMPILER2
79 #include "opto/runtime.hpp"
80 #endif
81
82 // Helper class to access current interpreter state
83 class LastFrameAccessor : public StackObj {
84 frame _last_frame;
85 public:
86 LastFrameAccessor(JavaThread* current) {
87 assert(current == Thread::current(), "sanity");
88 _last_frame = current->last_frame();
89 }
90 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
91 Method* method() const { return _last_frame.interpreter_frame_method(); }
92 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
93 int bci() const { return _last_frame.interpreter_frame_bci(); }
94 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
95
96 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
97 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
139 if (mdo != NULL) {
140 NEEDS_CLEANUP;
141 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
142 }
143 }
144 }
145
146 //------------------------------------------------------------------------------------------------------------------------
147 // Constants
148
149
150 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
151 // access constant pool
152 LastFrameAccessor last_frame(current);
153 ConstantPool* pool = last_frame.method()->constants();
154 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
155 constantTag tag = pool->tag_at(index);
156
157 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
158 Klass* klass = pool->klass_at(index, CHECK);
159 oop java_class = klass->java_mirror();
160 current->set_vm_result(java_class);
161 JRT_END
162
163 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
164 assert(bytecode == Bytecodes::_ldc ||
165 bytecode == Bytecodes::_ldc_w ||
166 bytecode == Bytecodes::_ldc2_w ||
167 bytecode == Bytecodes::_fast_aldc ||
168 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
169 ResourceMark rm(current);
170 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
171 bytecode == Bytecodes::_fast_aldc_w);
172 LastFrameAccessor last_frame(current);
173 methodHandle m (current, last_frame.method());
174 Bytecode_loadconstant ldc(m, last_frame.bci());
175
176 // Double-check the size. (Condy can have any type.)
177 BasicType type = ldc.result_type();
178 switch (type2size[type]) {
179 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
203 current->set_vm_result(result);
204 if (!is_fast_aldc) {
205 // Tell the interpreter how to unbox the primitive.
206 guarantee(java_lang_boxing_object::is_instance(result, type), "");
207 int offset = java_lang_boxing_object::value_offset(type);
208 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
209 | (offset & ConstantPoolCacheEntry::field_index_mask));
210 current->set_vm_result_2((Metadata*)flags);
211 }
212 }
213 JRT_END
214
215
216 //------------------------------------------------------------------------------------------------------------------------
217 // Allocation
218
219 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
220 Klass* k = pool->klass_at(index, CHECK);
221 InstanceKlass* klass = InstanceKlass::cast(k);
222
223 // Make sure we are not instantiating an abstract klass
224 klass->check_valid_for_instantiation(true, CHECK);
225
226 // Make sure klass is initialized
227 klass->initialize(CHECK);
228
229 // At this point the class may not be fully initialized
230 // because of recursive initialization. If it is fully
231 // initialized & has_finalized is not set, we rewrite
232 // it into its fast version (Note: no locking is needed
233 // here since this is an atomic byte write and can be
234 // done more than once).
235 //
236 // Note: In case of classes with has_finalized we don't
237 // rewrite since that saves us an extra check in
238 // the fast version which then would call the
239 // slow version anyway (and do a call back into
240 // Java).
241 // If we have a breakpoint, then we don't rewrite
242 // because the _breakpoint bytecode would be lost.
243 oop obj = klass->allocate_instance(CHECK);
244 current->set_vm_result(obj);
245 JRT_END
246
247
248 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
249 oop obj = oopFactory::new_typeArray(type, size, CHECK);
250 current->set_vm_result(obj);
251 JRT_END
252
253
254 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
255 Klass* klass = pool->klass_at(index, CHECK);
256 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
257 current->set_vm_result(obj);
258 JRT_END
259
260
261 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
262 // We may want to pass in more arguments - could make this slightly faster
263 LastFrameAccessor last_frame(current);
264 ConstantPool* constants = last_frame.method()->constants();
265 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
266 Klass* klass = constants->klass_at(i, CHECK);
267 int nof_dims = last_frame.number_of_dimensions();
268 assert(klass->is_klass(), "not a class");
269 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
270
271 // We must create an array of jints to pass to multi_allocate.
272 ResourceMark rm(current);
273 const int small_dims = 10;
274 jint dim_array[small_dims];
275 jint *dims = &dim_array[0];
276 if (nof_dims > small_dims) {
277 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
278 }
279 for (int index = 0; index < nof_dims; index++) {
280 // offset from first_size_address is addressed as local[index]
281 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
282 dims[index] = first_size_address[n];
283 }
284 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
285 current->set_vm_result(obj);
286 JRT_END
287
288
289 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
290 assert(oopDesc::is_oop(obj), "must be a valid oop");
291 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
292 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
293 JRT_END
294
295
296 // Quicken instance-of and check-cast bytecodes
297 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
298 // Force resolving; quicken the bytecode
299 LastFrameAccessor last_frame(current);
300 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
301 ConstantPool* cpool = last_frame.method()->constants();
302 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
303 // program we might have seen an unquick'd bytecode in the interpreter but have another
304 // thread quicken the bytecode before we get here.
305 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
306 Klass* klass = cpool->klass_at(which, CHECK);
307 current->set_vm_result_2(klass);
308 JRT_END
309
310
311 //------------------------------------------------------------------------------------------------------------------------
312 // Exceptions
313
314 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
611 // and therefore we don't have the receiver object at our fingertips. (Though,
612 // on some platforms the receiver still resides in a register...). Thus,
613 // we have no choice but print an error message not containing the receiver
614 // type.
615 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
616 Method* missingMethod))
617 ResourceMark rm(current);
618 assert(missingMethod != NULL, "sanity");
619 methodHandle m(current, missingMethod);
620 LinkResolver::throw_abstract_method_error(m, THREAD);
621 JRT_END
622
623 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
624 Klass* recvKlass,
625 Method* missingMethod))
626 ResourceMark rm(current);
627 methodHandle mh = methodHandle(current, missingMethod);
628 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
629 JRT_END
630
631
632 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
633 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
634 JRT_END
635
636 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
637 Klass* recvKlass,
638 Klass* interfaceKlass))
639 ResourceMark rm(current);
640 char buf[1000];
641 buf[0] = '\0';
642 jio_snprintf(buf, sizeof(buf),
643 "Class %s does not implement the requested interface %s",
644 recvKlass ? recvKlass->external_name() : "NULL",
645 interfaceKlass ? interfaceKlass->external_name() : "NULL");
646 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
647 JRT_END
648
649 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
650 THROW(vmSymbols::java_lang_NullPointerException());
651 JRT_END
652
653 //------------------------------------------------------------------------------------------------------------------------
654 // Fields
655 //
656
657 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
658 // resolve field
659 fieldDescriptor info;
660 LastFrameAccessor last_frame(current);
661 constantPoolHandle pool(current, last_frame.method()->constants());
662 methodHandle m(current, last_frame.method());
663 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
664 bytecode == Bytecodes::_putstatic);
665 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
666
667 {
668 JvmtiHideSingleStepping jhss(current);
669 JavaThread* THREAD = current; // For exception macros.
670 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
671 m, bytecode, CHECK);
672 } // end JvmtiHideSingleStepping
673
674 // check if link resolution caused cpCache to be updated
675 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
676 if (cp_cache_entry->is_resolved(bytecode)) return;
677
678 // compute auxiliary field attributes
679 TosState state = as_TosState(info.field_type());
680
681 // Resolution of put instructions on final fields is delayed. That is required so that
682 // exceptions are thrown at the correct place (when the instruction is actually invoked).
683 // If we do not resolve an instruction in the current pass, leaving the put_code
684 // set to zero will cause the next put instruction to the same field to reresolve.
685
690 // initializer method <init>. If resolution were not inhibited, a putfield
691 // in an initializer method could be resolved in the initializer. Subsequent
692 // putfield instructions to the same field would then use cached information.
693 // As a result, those instructions would not pass through the VM. That is,
694 // checks in resolve_field_access() would not be executed for those instructions
695 // and the required IllegalAccessError would not be thrown.
696 //
697 // Also, we need to delay resolving getstatic and putstatic instructions until the
698 // class is initialized. This is required so that access to the static
699 // field will call the initialization function every time until the class
700 // is completely initialized ala. in 2.17.5 in JVM Specification.
701 InstanceKlass* klass = info.field_holder();
702 bool uninitialized_static = is_static && !klass->is_initialized();
703 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
704 info.has_initialized_final_update();
705 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
706
707 Bytecodes::Code get_code = (Bytecodes::Code)0;
708 Bytecodes::Code put_code = (Bytecodes::Code)0;
709 if (!uninitialized_static) {
710 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
711 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
712 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
713 }
714 }
715
716 cp_cache_entry->set_field(
717 get_code,
718 put_code,
719 info.field_holder(),
720 info.index(),
721 info.offset(),
722 state,
723 info.access_flags().is_final(),
724 info.access_flags().is_volatile()
725 );
726 }
727
728
729 //------------------------------------------------------------------------------------------------------------------------
730 // Synchronization
731 //
732 // The interpreter's synchronization code is factored out so that it can
733 // be shared by method invocation and synchronized blocks.
734 //%note synchronization_3
735
736 //%note monitor_1
737 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
738 #ifdef ASSERT
739 current->last_frame().interpreter_frame_verify_monitor(elem);
740 #endif
741 Handle h_obj(current, elem->obj());
742 assert(Universe::heap()->is_in_or_null(h_obj()),
743 "must be NULL or an object");
744 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
943 {
944 JvmtiHideSingleStepping jhss(current);
945 JavaThread* THREAD = current; // For exception macros.
946 LinkResolver::resolve_invoke(info, Handle(), pool,
947 index, bytecode, CHECK);
948 } // end JvmtiHideSingleStepping
949
950 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
951 cp_cache_entry->set_dynamic_call(pool, info);
952 }
953
954 // This function is the interface to the assembly code. It returns the resolved
955 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
956 // This function will check for redefinition!
957 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
958 switch (bytecode) {
959 case Bytecodes::_getstatic:
960 case Bytecodes::_putstatic:
961 case Bytecodes::_getfield:
962 case Bytecodes::_putfield:
963 resolve_get_put(current, bytecode);
964 break;
965 case Bytecodes::_invokevirtual:
966 case Bytecodes::_invokespecial:
967 case Bytecodes::_invokestatic:
968 case Bytecodes::_invokeinterface:
969 resolve_invoke(current, bytecode);
970 break;
971 case Bytecodes::_invokehandle:
972 resolve_invokehandle(current);
973 break;
974 case Bytecodes::_invokedynamic:
975 resolve_invokedynamic(current);
976 break;
977 default:
978 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
979 break;
980 }
981 }
982 JRT_END
1145 // This function is called by the interpreter when the return poll found a reason
1146 // to call the VM. The reason could be that we are returning into a not yet safe
1147 // to access frame. We handle that below.
1148 // Note that this path does not check for single stepping, because we do not want
1149 // to single step when unwinding frames for an exception being thrown. Instead,
1150 // such single stepping code will use the safepoint table, which will use the
1151 // InterpreterRuntime::at_safepoint callback.
1152 StackWatermarkSet::before_unwind(current);
1153 JRT_END
1154
1155 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1156 ConstantPoolCacheEntry *cp_entry))
1157
1158 // check the access_flags for the field in the klass
1159
1160 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1161 int index = cp_entry->field_index();
1162 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1163
1164 bool is_static = (obj == NULL);
1165 HandleMark hm(current);
1166
1167 Handle h_obj;
1168 if (!is_static) {
1169 // non-static field accessors have an object, but we need a handle
1170 h_obj = Handle(current, obj);
1171 }
1172 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1173 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static);
1174 LastFrameAccessor last_frame(current);
1175 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1176 JRT_END
1177
1178 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1179 ConstantPoolCacheEntry *cp_entry, jvalue *value))
1180
1181 Klass* k = cp_entry->f1_as_klass();
1182
1183 // check the access_flags for the field in the klass
1184 InstanceKlass* ik = InstanceKlass::cast(k);
1185 int index = cp_entry->field_index();
1186 // bail out if field modifications are not watched
1187 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1188
1189 char sig_type = '\0';
1190
1191 switch(cp_entry->flag_state()) {
1192 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1193 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1194 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1195 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1196 case itos: sig_type = JVM_SIGNATURE_INT; break;
1197 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1198 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1199 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1200 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1201 default: ShouldNotReachHere(); return;
1202 }
1203 bool is_static = (obj == NULL);
1204
1205 HandleMark hm(current);
1206 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static);
1207 jvalue fvalue;
1208 #ifdef _LP64
1209 fvalue = *value;
1210 #else
1211 // Long/double values are stored unaligned and also noncontiguously with
1212 // tagged stacks. We can't just do a simple assignment even in the non-
1213 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1214 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1215 // We assume that the two halves of longs/doubles are stored in interpreter
1216 // stack slots in platform-endian order.
1217 jlong_accessor u;
1218 jint* newval = (jint*)value;
1219 u.words[0] = newval[0];
1220 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1221 fvalue.j = u.long_value;
1222 #endif // _LP64
1223
1224 Handle h_obj;
1225 if (!is_static) {
1226 // non-static field accessors have an object, but we need a handle
|
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 "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.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/bytecodeTracer.hpp"
38 #include "interpreter/interpreter.hpp"
39 #include "interpreter/interpreterRuntime.hpp"
40 #include "interpreter/linkResolver.hpp"
41 #include "interpreter/templateTable.hpp"
42 #include "jvm_io.h"
43 #include "logging/log.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/constantPool.hpp"
48 #include "oops/cpCache.inline.hpp"
49 #include "oops/flatArrayKlass.hpp"
50 #include "oops/flatArrayOop.inline.hpp"
51 #include "oops/inlineKlass.inline.hpp"
52 #include "oops/instanceKlass.inline.hpp"
53 #include "oops/klass.inline.hpp"
54 #include "oops/methodData.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.hpp"
78 #include "runtime/threadCritical.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #ifdef COMPILER2
84 #include "opto/runtime.hpp"
85 #endif
86
87 // Helper class to access current interpreter state
88 class LastFrameAccessor : public StackObj {
89 frame _last_frame;
90 public:
91 LastFrameAccessor(JavaThread* current) {
92 assert(current == Thread::current(), "sanity");
93 _last_frame = current->last_frame();
94 }
95 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
96 Method* method() const { return _last_frame.interpreter_frame_method(); }
97 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
98 int bci() const { return _last_frame.interpreter_frame_bci(); }
99 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
100
101 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
102 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
144 if (mdo != NULL) {
145 NEEDS_CLEANUP;
146 last_frame.set_mdp(mdo->bci_to_dp(last_frame.bci()));
147 }
148 }
149 }
150
151 //------------------------------------------------------------------------------------------------------------------------
152 // Constants
153
154
155 JRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* current, bool wide))
156 // access constant pool
157 LastFrameAccessor last_frame(current);
158 ConstantPool* pool = last_frame.method()->constants();
159 int index = wide ? last_frame.get_index_u2(Bytecodes::_ldc_w) : last_frame.get_index_u1(Bytecodes::_ldc);
160 constantTag tag = pool->tag_at(index);
161
162 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
163 Klass* klass = pool->klass_at(index, CHECK);
164 oop java_class = tag.is_Qdescriptor_klass()
165 ? InlineKlass::cast(klass)->val_mirror()
166 : klass->java_mirror();
167 current->set_vm_result(java_class);
168 JRT_END
169
170 JRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* current, Bytecodes::Code bytecode)) {
171 assert(bytecode == Bytecodes::_ldc ||
172 bytecode == Bytecodes::_ldc_w ||
173 bytecode == Bytecodes::_ldc2_w ||
174 bytecode == Bytecodes::_fast_aldc ||
175 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
176 ResourceMark rm(current);
177 const bool is_fast_aldc = (bytecode == Bytecodes::_fast_aldc ||
178 bytecode == Bytecodes::_fast_aldc_w);
179 LastFrameAccessor last_frame(current);
180 methodHandle m (current, last_frame.method());
181 Bytecode_loadconstant ldc(m, last_frame.bci());
182
183 // Double-check the size. (Condy can have any type.)
184 BasicType type = ldc.result_type();
185 switch (type2size[type]) {
186 case 2: guarantee(bytecode == Bytecodes::_ldc2_w, ""); break;
210 current->set_vm_result(result);
211 if (!is_fast_aldc) {
212 // Tell the interpreter how to unbox the primitive.
213 guarantee(java_lang_boxing_object::is_instance(result, type), "");
214 int offset = java_lang_boxing_object::value_offset(type);
215 intptr_t flags = ((as_TosState(type) << ConstantPoolCacheEntry::tos_state_shift)
216 | (offset & ConstantPoolCacheEntry::field_index_mask));
217 current->set_vm_result_2((Metadata*)flags);
218 }
219 }
220 JRT_END
221
222
223 //------------------------------------------------------------------------------------------------------------------------
224 // Allocation
225
226 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
227 Klass* k = pool->klass_at(index, CHECK);
228 InstanceKlass* klass = InstanceKlass::cast(k);
229
230 if (klass->is_inline_klass()) {
231 THROW(vmSymbols::java_lang_InstantiationError());
232 }
233
234 // Make sure we are not instantiating an abstract klass
235 klass->check_valid_for_instantiation(true, CHECK);
236
237 // Make sure klass is initialized
238 klass->initialize(CHECK);
239
240 // At this point the class may not be fully initialized
241 // because of recursive initialization. If it is fully
242 // initialized & has_finalized is not set, we rewrite
243 // it into its fast version (Note: no locking is needed
244 // here since this is an atomic byte write and can be
245 // done more than once).
246 //
247 // Note: In case of classes with has_finalized we don't
248 // rewrite since that saves us an extra check in
249 // the fast version which then would call the
250 // slow version anyway (and do a call back into
251 // Java).
252 // If we have a breakpoint, then we don't rewrite
253 // because the _breakpoint bytecode would be lost.
254 oop obj = klass->allocate_instance(CHECK);
255 current->set_vm_result(obj);
256 JRT_END
257
258 JRT_ENTRY(void, InterpreterRuntime::aconst_init(JavaThread* current, ConstantPool* pool, int index))
259 // Getting the InlineKlass
260 Klass* k = pool->klass_at(index, CHECK);
261 if (!k->is_inline_klass()) {
262 // inconsistency with 'new' which throws an InstantiationError
263 // in the future, aconst_init will just return null instead of throwing an exception
264 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
265 }
266 assert(k->is_inline_klass(), "aconst_init argument must be the inline type class");
267 InlineKlass* vklass = InlineKlass::cast(k);
268
269 vklass->initialize(CHECK);
270 oop res = vklass->default_value();
271 current->set_vm_result(res);
272 JRT_END
273
274 JRT_ENTRY(int, InterpreterRuntime::withfield(JavaThread* current, ConstantPoolCacheEntry* cpe, uintptr_t ptr))
275 oop obj = NULL;
276 int recv_offset = type2size[as_BasicType(cpe->flag_state())];
277 assert(frame::interpreter_frame_expression_stack_direction() == -1, "currently is -1 on all platforms");
278 int ret_adj = (recv_offset + type2size[T_OBJECT] )* AbstractInterpreter::stackElementSize;
279 int offset = cpe->f2_as_offset();
280 obj = (oopDesc*)(((uintptr_t*)ptr)[recv_offset * Interpreter::stackElementWords]);
281 if (obj == NULL) {
282 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
283 }
284 assert(oopDesc::is_oop(obj), "Verifying receiver");
285 assert(obj->klass()->is_inline_klass(), "Must have been checked during resolution");
286 instanceHandle old_value_h(THREAD, (instanceOop)obj);
287 oop ref = NULL;
288 if (cpe->flag_state() == atos) {
289 ref = *(oopDesc**)ptr;
290 }
291 Handle ref_h(THREAD, ref);
292 InlineKlass* ik = InlineKlass::cast(old_value_h()->klass());
293 // Ensure that the class is initialized or being initialized
294 // If the class is in error state, the creation of a new value should not be allowed
295 ik->initialize(CHECK_(ret_adj));
296
297 bool can_skip = false;
298 switch(cpe->flag_state()) {
299 case ztos:
300 if (old_value_h()->bool_field(offset) == (jboolean)(*(jint*)ptr)) can_skip = true;
301 break;
302 case btos:
303 if (old_value_h()->byte_field(offset) == (jbyte)(*(jint*)ptr)) can_skip = true;
304 break;
305 case ctos:
306 if (old_value_h()->char_field(offset) == (jchar)(*(jint*)ptr)) can_skip = true;
307 break;
308 case stos:
309 if (old_value_h()->short_field(offset) == (jshort)(*(jint*)ptr)) can_skip = true;
310 break;
311 case itos:
312 if (old_value_h()->int_field(offset) == *(jint*)ptr) can_skip = true;
313 break;
314 case ltos:
315 if (old_value_h()->long_field(offset) == *(jlong*)ptr) can_skip = true;
316 break;
317 case ftos:
318 if (memcmp(old_value_h()->field_addr<jfloat>(offset), (jfloat*)ptr, sizeof(jfloat)) == 0) can_skip = true;
319 break;
320 case dtos:
321 if (memcmp(old_value_h()->field_addr<jdouble>(offset), (jdouble*)ptr, sizeof(jdouble)) == 0) can_skip = true;
322 break;
323 case atos:
324 if (!cpe->is_inlined() && old_value_h()->obj_field(offset) == ref_h()) can_skip = true;
325 break;
326 default:
327 break;
328 }
329 if (can_skip) {
330 current->set_vm_result(old_value_h());
331 return ret_adj;
332 }
333
334 instanceOop new_value = ik->allocate_instance_buffer(CHECK_(ret_adj));
335 Handle new_value_h = Handle(THREAD, new_value);
336 ik->inline_copy_oop_to_new_oop(old_value_h(), new_value_h());
337 switch(cpe->flag_state()) {
338 case ztos:
339 new_value_h()->bool_field_put(offset, (jboolean)(*(jint*)ptr));
340 break;
341 case btos:
342 new_value_h()->byte_field_put(offset, (jbyte)(*(jint*)ptr));
343 break;
344 case ctos:
345 new_value_h()->char_field_put(offset, (jchar)(*(jint*)ptr));
346 break;
347 case stos:
348 new_value_h()->short_field_put(offset, (jshort)(*(jint*)ptr));
349 break;
350 case itos:
351 new_value_h()->int_field_put(offset, (*(jint*)ptr));
352 break;
353 case ltos:
354 new_value_h()->long_field_put(offset, *(jlong*)ptr);
355 break;
356 case ftos:
357 new_value_h()->float_field_put(offset, *(jfloat*)ptr);
358 break;
359 case dtos:
360 new_value_h()->double_field_put(offset, *(jdouble*)ptr);
361 break;
362 case atos:
363 {
364 if (cpe->is_null_free_inline_type()) {
365 if (!cpe->is_inlined()) {
366 if (ref_h() == NULL) {
367 THROW_(vmSymbols::java_lang_NullPointerException(), ret_adj);
368 }
369 new_value_h()->obj_field_put(offset, ref_h());
370 } else {
371 int field_index = cpe->field_index();
372 InlineKlass* field_ik = InlineKlass::cast(ik->get_inline_type_field_klass(field_index));
373 field_ik->write_inlined_field(new_value_h(), offset, ref_h(), CHECK_(ret_adj));
374 }
375 } else {
376 new_value_h()->obj_field_put(offset, ref_h());
377 }
378 }
379 break;
380 default:
381 ShouldNotReachHere();
382 }
383 current->set_vm_result(new_value_h());
384 return ret_adj;
385 JRT_END
386
387 JRT_ENTRY(void, InterpreterRuntime::uninitialized_static_inline_type_field(JavaThread* current, oopDesc* mirror, int index))
388 // The interpreter tries to access an inline static field that has not been initialized.
389 // This situation can happen in different scenarios:
390 // 1 - if the load or initialization of the field failed during step 8 of
391 // the initialization of the holder of the field, in this case the access to the field
392 // must fail
393 // 2 - it can also happen when the initialization of the holder class triggered the initialization of
394 // another class which accesses this field in its static initializer, in this case the
395 // access must succeed to allow circularity
396 // The code below tries to load and initialize the field's class again before returning the default value.
397 // If the field was not initialized because of an error, an exception should be thrown.
398 // If the class is being initialized, the default value is returned.
399 instanceHandle mirror_h(THREAD, (instanceOop)mirror);
400 InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
401 assert(klass->field_signature(index)->is_Q_signature(), "Sanity check");
402 if (klass->is_being_initialized() && klass->is_init_thread(THREAD)) {
403 int offset = klass->field_offset(index);
404 Klass* field_k = klass->get_inline_type_field_klass_or_null(index);
405 if (field_k == NULL) {
406 field_k = SystemDictionary::resolve_or_fail(klass->field_signature(index)->fundamental_name(THREAD),
407 Handle(THREAD, klass->class_loader()),
408 Handle(THREAD, klass->protection_domain()),
409 true, CHECK);
410 assert(field_k != NULL, "Should have been loaded or an exception thrown above");
411 klass->set_inline_type_field_klass(index, field_k);
412 }
413 field_k->initialize(CHECK);
414 oop defaultvalue = InlineKlass::cast(field_k)->default_value();
415 // It is safe to initialize the static field because 1) the current thread is the initializing thread
416 // and is the only one that can access it, and 2) the field is actually not initialized (i.e. null)
417 // otherwise the JVM should not be executing this code.
418 mirror_h()->obj_field_put(offset, defaultvalue);
419 current->set_vm_result(defaultvalue);
420 } else {
421 assert(klass->is_in_error_state(), "If not initializing, initialization must have failed to get there");
422 ResourceMark rm(THREAD);
423 const char* desc = "Could not initialize class ";
424 const char* className = klass->external_name();
425 size_t msglen = strlen(desc) + strlen(className) + 1;
426 char* message = NEW_RESOURCE_ARRAY(char, msglen);
427 if (NULL == message) {
428 // Out of memory: can't create detailed error message
429 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
430 } else {
431 jio_snprintf(message, msglen, "%s%s", desc, className);
432 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
433 }
434 }
435 JRT_END
436
437 JRT_ENTRY(void, InterpreterRuntime::read_inlined_field(JavaThread* current, oopDesc* obj, int index, Klass* field_holder))
438 Handle obj_h(THREAD, obj);
439
440 assert(oopDesc::is_oop(obj), "Sanity check");
441
442 assert(field_holder->is_instance_klass(), "Sanity check");
443 InstanceKlass* klass = InstanceKlass::cast(field_holder);
444
445 assert(klass->field_is_inlined(index), "Sanity check");
446
447 InlineKlass* field_vklass = InlineKlass::cast(klass->get_inline_type_field_klass(index));
448
449 oop res = field_vklass->read_inlined_field(obj_h(), klass->field_offset(index), CHECK);
450 current->set_vm_result(res);
451 JRT_END
452
453 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
454 oop obj = oopFactory::new_typeArray(type, size, CHECK);
455 current->set_vm_result(obj);
456 JRT_END
457
458
459 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
460 Klass* klass = pool->klass_at(index, CHECK);
461 bool is_qtype_desc = pool->tag_at(index).is_Qdescriptor_klass();
462 arrayOop obj;
463 if ((!klass->is_array_klass()) && is_qtype_desc) { // Logically creates elements, ensure klass init
464 klass->initialize(CHECK);
465 obj = oopFactory::new_valueArray(klass, size, CHECK);
466 } else {
467 obj = oopFactory::new_objArray(klass, size, CHECK);
468 }
469 current->set_vm_result(obj);
470 JRT_END
471
472 JRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* current, arrayOopDesc* array, int index))
473 flatArrayHandle vah(current, (flatArrayOop)array);
474 oop value_holder = flatArrayOopDesc::value_alloc_copy_from_index(vah, index, CHECK);
475 current->set_vm_result(value_holder);
476 JRT_END
477
478 JRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* current, void* val, arrayOopDesc* array, int index))
479 assert(val != NULL, "can't store null into flat array");
480 ((flatArrayOop)array)->value_copy_to_index(cast_to_oop(val), index);
481 JRT_END
482
483 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
484 // We may want to pass in more arguments - could make this slightly faster
485 LastFrameAccessor last_frame(current);
486 ConstantPool* constants = last_frame.method()->constants();
487 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
488 Klass* klass = constants->klass_at(i, CHECK);
489 bool is_qtype = klass->name()->is_Q_array_signature();
490 int nof_dims = last_frame.number_of_dimensions();
491 assert(klass->is_klass(), "not a class");
492 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
493
494 if (is_qtype) { // Logically creates elements, ensure klass init
495 klass->initialize(CHECK);
496 }
497
498 // We must create an array of jints to pass to multi_allocate.
499 ResourceMark rm(current);
500 const int small_dims = 10;
501 jint dim_array[small_dims];
502 jint *dims = &dim_array[0];
503 if (nof_dims > small_dims) {
504 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
505 }
506 for (int index = 0; index < nof_dims; index++) {
507 // offset from first_size_address is addressed as local[index]
508 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
509 dims[index] = first_size_address[n];
510 }
511 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
512 current->set_vm_result(obj);
513 JRT_END
514
515
516 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
517 assert(oopDesc::is_oop(obj), "must be a valid oop");
518 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
519 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
520 JRT_END
521
522 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
523 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
524
525 Handle ha(THREAD, aobj);
526 Handle hb(THREAD, bobj);
527 JavaValue result(T_BOOLEAN);
528 JavaCallArguments args;
529 args.push_oop(ha);
530 args.push_oop(hb);
531 methodHandle method(current, Universe::is_substitutable_method());
532 JavaCalls::call(&result, method, &args, THREAD);
533 if (HAS_PENDING_EXCEPTION) {
534 // Something really bad happened because isSubstitutable() should not throw exceptions
535 // If it is an error, just let it propagate
536 // If it is an exception, wrap it into an InternalError
537 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
538 Handle e(THREAD, PENDING_EXCEPTION);
539 CLEAR_PENDING_EXCEPTION;
540 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
541 }
542 }
543 return result.get_jboolean();
544 JRT_END
545
546 // Quicken instance-of and check-cast bytecodes
547 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
548 // Force resolving; quicken the bytecode
549 LastFrameAccessor last_frame(current);
550 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
551 ConstantPool* cpool = last_frame.method()->constants();
552 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
553 // program we might have seen an unquick'd bytecode in the interpreter but have another
554 // thread quicken the bytecode before we get here.
555 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
556 Klass* klass = cpool->klass_at(which, CHECK);
557 current->set_vm_result_2(klass);
558 JRT_END
559
560
561 //------------------------------------------------------------------------------------------------------------------------
562 // Exceptions
563
564 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
861 // and therefore we don't have the receiver object at our fingertips. (Though,
862 // on some platforms the receiver still resides in a register...). Thus,
863 // we have no choice but print an error message not containing the receiver
864 // type.
865 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
866 Method* missingMethod))
867 ResourceMark rm(current);
868 assert(missingMethod != NULL, "sanity");
869 methodHandle m(current, missingMethod);
870 LinkResolver::throw_abstract_method_error(m, THREAD);
871 JRT_END
872
873 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
874 Klass* recvKlass,
875 Method* missingMethod))
876 ResourceMark rm(current);
877 methodHandle mh = methodHandle(current, missingMethod);
878 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
879 JRT_END
880
881 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
882 THROW(vmSymbols::java_lang_InstantiationError());
883 JRT_END
884
885
886 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
887 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
888 JRT_END
889
890 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
891 Klass* recvKlass,
892 Klass* interfaceKlass))
893 ResourceMark rm(current);
894 char buf[1000];
895 buf[0] = '\0';
896 jio_snprintf(buf, sizeof(buf),
897 "Class %s does not implement the requested interface %s",
898 recvKlass ? recvKlass->external_name() : "NULL",
899 interfaceKlass ? interfaceKlass->external_name() : "NULL");
900 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
901 JRT_END
902
903 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
904 THROW(vmSymbols::java_lang_NullPointerException());
905 JRT_END
906
907 //------------------------------------------------------------------------------------------------------------------------
908 // Fields
909 //
910
911 void InterpreterRuntime::resolve_get_put(JavaThread* current, Bytecodes::Code bytecode) {
912 // resolve field
913 fieldDescriptor info;
914 LastFrameAccessor last_frame(current);
915 constantPoolHandle pool(current, last_frame.method()->constants());
916 methodHandle m(current, last_frame.method());
917 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
918 bytecode == Bytecodes::_putstatic || bytecode == Bytecodes::_withfield);
919 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
920 bool is_inline_type = bytecode == Bytecodes::_withfield;
921
922 {
923 JvmtiHideSingleStepping jhss(current);
924 JavaThread* THREAD = current; // For exception macros.
925 LinkResolver::resolve_field_access(info, pool, last_frame.get_index_u2_cpcache(bytecode),
926 m, bytecode, CHECK);
927 } // end JvmtiHideSingleStepping
928
929 // check if link resolution caused cpCache to be updated
930 ConstantPoolCacheEntry* cp_cache_entry = last_frame.cache_entry();
931 if (cp_cache_entry->is_resolved(bytecode)) return;
932
933 // compute auxiliary field attributes
934 TosState state = as_TosState(info.field_type());
935
936 // Resolution of put instructions on final fields is delayed. That is required so that
937 // exceptions are thrown at the correct place (when the instruction is actually invoked).
938 // If we do not resolve an instruction in the current pass, leaving the put_code
939 // set to zero will cause the next put instruction to the same field to reresolve.
940
945 // initializer method <init>. If resolution were not inhibited, a putfield
946 // in an initializer method could be resolved in the initializer. Subsequent
947 // putfield instructions to the same field would then use cached information.
948 // As a result, those instructions would not pass through the VM. That is,
949 // checks in resolve_field_access() would not be executed for those instructions
950 // and the required IllegalAccessError would not be thrown.
951 //
952 // Also, we need to delay resolving getstatic and putstatic instructions until the
953 // class is initialized. This is required so that access to the static
954 // field will call the initialization function every time until the class
955 // is completely initialized ala. in 2.17.5 in JVM Specification.
956 InstanceKlass* klass = info.field_holder();
957 bool uninitialized_static = is_static && !klass->is_initialized();
958 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
959 info.has_initialized_final_update();
960 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
961
962 Bytecodes::Code get_code = (Bytecodes::Code)0;
963 Bytecodes::Code put_code = (Bytecodes::Code)0;
964 if (!uninitialized_static) {
965 if (is_static) {
966 get_code = Bytecodes::_getstatic;
967 } else {
968 get_code = Bytecodes::_getfield;
969 }
970 if (is_put && is_inline_type) {
971 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_withfield);
972 } else if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
973 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
974 }
975 }
976
977 cp_cache_entry->set_field(
978 get_code,
979 put_code,
980 info.field_holder(),
981 info.index(),
982 info.offset(),
983 state,
984 info.access_flags().is_final(),
985 info.access_flags().is_volatile(),
986 info.is_inlined(),
987 info.signature()->is_Q_signature() && info.is_inline_type()
988 );
989 }
990
991
992 //------------------------------------------------------------------------------------------------------------------------
993 // Synchronization
994 //
995 // The interpreter's synchronization code is factored out so that it can
996 // be shared by method invocation and synchronized blocks.
997 //%note synchronization_3
998
999 //%note monitor_1
1000 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
1001 #ifdef ASSERT
1002 current->last_frame().interpreter_frame_verify_monitor(elem);
1003 #endif
1004 Handle h_obj(current, elem->obj());
1005 assert(Universe::heap()->is_in_or_null(h_obj()),
1006 "must be NULL or an object");
1007 ObjectSynchronizer::enter(h_obj, elem->lock(), current);
1206 {
1207 JvmtiHideSingleStepping jhss(current);
1208 JavaThread* THREAD = current; // For exception macros.
1209 LinkResolver::resolve_invoke(info, Handle(), pool,
1210 index, bytecode, CHECK);
1211 } // end JvmtiHideSingleStepping
1212
1213 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
1214 cp_cache_entry->set_dynamic_call(pool, info);
1215 }
1216
1217 // This function is the interface to the assembly code. It returns the resolved
1218 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
1219 // This function will check for redefinition!
1220 JRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* current, Bytecodes::Code bytecode)) {
1221 switch (bytecode) {
1222 case Bytecodes::_getstatic:
1223 case Bytecodes::_putstatic:
1224 case Bytecodes::_getfield:
1225 case Bytecodes::_putfield:
1226 case Bytecodes::_withfield:
1227 resolve_get_put(current, bytecode);
1228 break;
1229 case Bytecodes::_invokevirtual:
1230 case Bytecodes::_invokespecial:
1231 case Bytecodes::_invokestatic:
1232 case Bytecodes::_invokeinterface:
1233 resolve_invoke(current, bytecode);
1234 break;
1235 case Bytecodes::_invokehandle:
1236 resolve_invokehandle(current);
1237 break;
1238 case Bytecodes::_invokedynamic:
1239 resolve_invokedynamic(current);
1240 break;
1241 default:
1242 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
1243 break;
1244 }
1245 }
1246 JRT_END
1409 // This function is called by the interpreter when the return poll found a reason
1410 // to call the VM. The reason could be that we are returning into a not yet safe
1411 // to access frame. We handle that below.
1412 // Note that this path does not check for single stepping, because we do not want
1413 // to single step when unwinding frames for an exception being thrown. Instead,
1414 // such single stepping code will use the safepoint table, which will use the
1415 // InterpreterRuntime::at_safepoint callback.
1416 StackWatermarkSet::before_unwind(current);
1417 JRT_END
1418
1419 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1420 ConstantPoolCacheEntry *cp_entry))
1421
1422 // check the access_flags for the field in the klass
1423
1424 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1425 int index = cp_entry->field_index();
1426 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1427
1428 bool is_static = (obj == NULL);
1429 bool is_inlined = cp_entry->is_inlined();
1430 HandleMark hm(current);
1431
1432 Handle h_obj;
1433 if (!is_static) {
1434 // non-static field accessors have an object, but we need a handle
1435 h_obj = Handle(current, obj);
1436 }
1437 InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass());
1438 jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static, is_inlined);
1439 LastFrameAccessor last_frame(current);
1440 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), cp_entry_f1, h_obj, fid);
1441 JRT_END
1442
1443 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1444 ConstantPoolCacheEntry *cp_entry, jvalue *value))
1445
1446 Klass* k = cp_entry->f1_as_klass();
1447
1448 // check the access_flags for the field in the klass
1449 InstanceKlass* ik = InstanceKlass::cast(k);
1450 int index = cp_entry->field_index();
1451 // bail out if field modifications are not watched
1452 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1453
1454 char sig_type = '\0';
1455
1456 switch(cp_entry->flag_state()) {
1457 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1458 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1459 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1460 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1461 case itos: sig_type = JVM_SIGNATURE_INT; break;
1462 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1463 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1464 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1465 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1466 default: ShouldNotReachHere(); return;
1467 }
1468
1469 // Both Q-signatures and L-signatures are mapped to atos
1470 if (cp_entry->flag_state() == atos && ik->field_signature(index)->is_Q_signature()) {
1471 sig_type = JVM_SIGNATURE_PRIMITIVE_OBJECT;
1472 }
1473
1474 bool is_static = (obj == NULL);
1475 bool is_inlined = cp_entry->is_inlined();
1476
1477 HandleMark hm(current);
1478 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, cp_entry->f2_as_index(), is_static, is_inlined);
1479 jvalue fvalue;
1480 #ifdef _LP64
1481 fvalue = *value;
1482 #else
1483 // Long/double values are stored unaligned and also noncontiguously with
1484 // tagged stacks. We can't just do a simple assignment even in the non-
1485 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1486 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1487 // We assume that the two halves of longs/doubles are stored in interpreter
1488 // stack slots in platform-endian order.
1489 jlong_accessor u;
1490 jint* newval = (jint*)value;
1491 u.words[0] = newval[0];
1492 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1493 fvalue.j = u.long_value;
1494 #endif // _LP64
1495
1496 Handle h_obj;
1497 if (!is_static) {
1498 // non-static field accessors have an object, but we need a handle
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