7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compilationPolicy.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/barrierSetNMethod.hpp"
34 #include "gc/shared/collectedHeap.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/interpreterRuntime.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "interpreter/templateTable.hpp"
40 #include "jvm_io.h"
41 #include "logging/log.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/constantPool.inline.hpp"
46 #include "oops/cpCache.inline.hpp"
47 #include "oops/instanceKlass.inline.hpp"
48 #include "oops/klass.inline.hpp"
49 #include "oops/methodData.hpp"
50 #include "oops/method.inline.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "oops/symbol.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/methodHandles.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "runtime/atomic.hpp"
59 #include "runtime/continuation.hpp"
60 #include "runtime/deoptimization.hpp"
61 #include "runtime/fieldDescriptor.inline.hpp"
62 #include "runtime/frame.inline.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/icache.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/osThread.hpp"
70 #include "runtime/sharedRuntime.hpp"
71 #include "runtime/stackWatermarkSet.hpp"
72 #include "runtime/stubRoutines.hpp"
73 #include "runtime/synchronizer.inline.hpp"
74 #include "runtime/threadCritical.hpp"
75 #include "utilities/align.hpp"
76 #include "utilities/checkedCast.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/events.hpp"
79
80 // Helper class to access current interpreter state
81 class LastFrameAccessor : public StackObj {
82 frame _last_frame;
83 public:
84 LastFrameAccessor(JavaThread* current) {
85 assert(current == Thread::current(), "sanity");
86 _last_frame = current->last_frame();
87 }
88 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
89 Method* method() const { return _last_frame.interpreter_frame_method(); }
90 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
91 int bci() const { return _last_frame.interpreter_frame_bci(); }
92 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
93
94 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
95 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
96
97 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
98 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
206 JRT_END
207
208
209 //------------------------------------------------------------------------------------------------------------------------
210 // Allocation
211
212 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
213 Klass* k = pool->klass_at(index, CHECK);
214 InstanceKlass* klass = InstanceKlass::cast(k);
215
216 // Make sure we are not instantiating an abstract klass
217 klass->check_valid_for_instantiation(true, CHECK);
218
219 // Make sure klass is initialized
220 klass->initialize(CHECK);
221
222 oop obj = klass->allocate_instance(CHECK);
223 current->set_vm_result(obj);
224 JRT_END
225
226
227 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
228 oop obj = oopFactory::new_typeArray(type, size, CHECK);
229 current->set_vm_result(obj);
230 JRT_END
231
232
233 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
234 Klass* klass = pool->klass_at(index, CHECK);
235 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
236 current->set_vm_result(obj);
237 JRT_END
238
239
240 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
241 // We may want to pass in more arguments - could make this slightly faster
242 LastFrameAccessor last_frame(current);
243 ConstantPool* constants = last_frame.method()->constants();
244 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
245 Klass* klass = constants->klass_at(i, CHECK);
246 int nof_dims = last_frame.number_of_dimensions();
247 assert(klass->is_klass(), "not a class");
248 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
249
250 // We must create an array of jints to pass to multi_allocate.
251 ResourceMark rm(current);
252 const int small_dims = 10;
253 jint dim_array[small_dims];
254 jint *dims = &dim_array[0];
255 if (nof_dims > small_dims) {
256 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
257 }
258 for (int index = 0; index < nof_dims; index++) {
259 // offset from first_size_address is addressed as local[index]
260 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
261 dims[index] = first_size_address[n];
262 }
263 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
264 current->set_vm_result(obj);
265 JRT_END
266
267
268 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
269 assert(oopDesc::is_oop(obj), "must be a valid oop");
270 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
271 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
272 JRT_END
273
274
275 // Quicken instance-of and check-cast bytecodes
276 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
277 // Force resolving; quicken the bytecode
278 LastFrameAccessor last_frame(current);
279 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
280 ConstantPool* cpool = last_frame.method()->constants();
281 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
282 // program we might have seen an unquick'd bytecode in the interpreter but have another
283 // thread quicken the bytecode before we get here.
284 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
285 Klass* klass = cpool->klass_at(which, CHECK);
286 current->set_vm_result_2(klass);
287 JRT_END
288
289
290 //------------------------------------------------------------------------------------------------------------------------
291 // Exceptions
292
293 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
597 // and therefore we don't have the receiver object at our fingertips. (Though,
598 // on some platforms the receiver still resides in a register...). Thus,
599 // we have no choice but print an error message not containing the receiver
600 // type.
601 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
602 Method* missingMethod))
603 ResourceMark rm(current);
604 assert(missingMethod != nullptr, "sanity");
605 methodHandle m(current, missingMethod);
606 LinkResolver::throw_abstract_method_error(m, THREAD);
607 JRT_END
608
609 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
610 Klass* recvKlass,
611 Method* missingMethod))
612 ResourceMark rm(current);
613 methodHandle mh = methodHandle(current, missingMethod);
614 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
615 JRT_END
616
617
618 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
619 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
620 JRT_END
621
622 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
623 Klass* recvKlass,
624 Klass* interfaceKlass))
625 ResourceMark rm(current);
626 char buf[1000];
627 buf[0] = '\0';
628 jio_snprintf(buf, sizeof(buf),
629 "Class %s does not implement the requested interface %s",
630 recvKlass ? recvKlass->external_name() : "nullptr",
631 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
632 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
633 JRT_END
634
635 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
636 THROW(vmSymbols::java_lang_NullPointerException());
681 // initializer method <init>. If resolution were not inhibited, a putfield
682 // in an initializer method could be resolved in the initializer. Subsequent
683 // putfield instructions to the same field would then use cached information.
684 // As a result, those instructions would not pass through the VM. That is,
685 // checks in resolve_field_access() would not be executed for those instructions
686 // and the required IllegalAccessError would not be thrown.
687 //
688 // Also, we need to delay resolving getstatic and putstatic instructions until the
689 // class is initialized. This is required so that access to the static
690 // field will call the initialization function every time until the class
691 // is completely initialized ala. in 2.17.5 in JVM Specification.
692 InstanceKlass* klass = info.field_holder();
693 bool uninitialized_static = is_static && !klass->is_initialized();
694 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
695 info.has_initialized_final_update();
696 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
697
698 Bytecodes::Code get_code = (Bytecodes::Code)0;
699 Bytecodes::Code put_code = (Bytecodes::Code)0;
700 if (!uninitialized_static) {
701 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
702 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
703 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
704 }
705 }
706
707 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
708 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
709 entry->fill_in(info.field_holder(), info.offset(),
710 checked_cast<u2>(info.index()), checked_cast<u1>(state),
711 static_cast<u1>(get_code), static_cast<u1>(put_code));
712 }
713
714
715 //------------------------------------------------------------------------------------------------------------------------
716 // Synchronization
717 //
718 // The interpreter's synchronization code is factored out so that it can
719 // be shared by method invocation and synchronized blocks.
720 //%note synchronization_3
721
722 //%note monitor_1
723 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
724 #ifdef ASSERT
725 current->last_frame().interpreter_frame_verify_monitor(elem);
726 #endif
727 Handle h_obj(current, elem->obj());
728 assert(Universe::heap()->is_in_or_null(h_obj()),
735 #endif
736 JRT_END
737
738 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
739 oop obj = elem->obj();
740 assert(Universe::heap()->is_in(obj), "must be an object");
741 // The object could become unlocked through a JNI call, which we have no other checks for.
742 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
743 if (obj->is_unlocked()) {
744 if (CheckJNICalls) {
745 fatal("Object has been unlocked by JNI");
746 }
747 return;
748 }
749 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
750 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
751 // again at method exit or in the case of an exception.
752 elem->set_obj(nullptr);
753 JRT_END
754
755
756 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
757 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
758 JRT_END
759
760
761 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
762 // Returns an illegal exception to install into the current thread. The
763 // pending_exception flag is cleared so normal exception handling does not
764 // trigger. Any current installed exception will be overwritten. This
765 // method will be called during an exception unwind.
766
767 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
768 Handle exception(current, current->vm_result());
769 assert(exception() != nullptr, "vm result should be set");
770 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
771 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
772 current->set_vm_result(exception());
773 JRT_END
774
775
776 //------------------------------------------------------------------------------------------------------------------------
777 // Invokes
778
779 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
780 return method->orig_bytecode_at(method->bci_from(bcp));
781 JRT_END
782
783 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
784 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
785 JRT_END
786
787 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
788 JvmtiExport::post_raw_breakpoint(current, method, bcp);
789 JRT_END
790
791 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
792 LastFrameAccessor last_frame(current);
793 // extract receiver from the outgoing argument list if necessary
794 Handle receiver(current, nullptr);
1164 LastFrameAccessor last_frame(current);
1165 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1166 }
1167 JRT_END
1168
1169 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1170 assert(current == JavaThread::current(), "pre-condition");
1171 // This function is called by the interpreter when the return poll found a reason
1172 // to call the VM. The reason could be that we are returning into a not yet safe
1173 // to access frame. We handle that below.
1174 // Note that this path does not check for single stepping, because we do not want
1175 // to single step when unwinding frames for an exception being thrown. Instead,
1176 // such single stepping code will use the safepoint table, which will use the
1177 // InterpreterRuntime::at_safepoint callback.
1178 StackWatermarkSet::before_unwind(current);
1179 JRT_END
1180
1181 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1182 ResolvedFieldEntry *entry))
1183
1184 // check the access_flags for the field in the klass
1185
1186 InstanceKlass* ik = entry->field_holder();
1187 int index = entry->field_index();
1188 if (!ik->field_status(index).is_access_watched()) return;
1189
1190 bool is_static = (obj == nullptr);
1191 HandleMark hm(current);
1192
1193 Handle h_obj;
1194 if (!is_static) {
1195 // non-static field accessors have an object, but we need a handle
1196 h_obj = Handle(current, obj);
1197 }
1198 InstanceKlass* field_holder = entry->field_holder(); // HERE
1199 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1200 LastFrameAccessor last_frame(current);
1201 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1202 JRT_END
1203
1204 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1205 ResolvedFieldEntry *entry, jvalue *value))
1206
1207 InstanceKlass* ik = entry->field_holder();
1208
1209 // check the access_flags for the field in the klass
1210 int index = entry->field_index();
1211 // bail out if field modifications are not watched
1212 if (!ik->field_status(index).is_modification_watched()) return;
1213
1214 char sig_type = '\0';
1215
1216 switch((TosState)entry->tos_state()) {
1217 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1218 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1219 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1220 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1221 case itos: sig_type = JVM_SIGNATURE_INT; break;
1222 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1223 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1224 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1225 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1226 default: ShouldNotReachHere(); return;
1227 }
1228 bool is_static = (obj == nullptr);
1229
1230 HandleMark hm(current);
1231 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1232 jvalue fvalue;
1233 #ifdef _LP64
1234 fvalue = *value;
1235 #else
1236 // Long/double values are stored unaligned and also noncontiguously with
1237 // tagged stacks. We can't just do a simple assignment even in the non-
1238 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1239 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1240 // We assume that the two halves of longs/doubles are stored in interpreter
1241 // stack slots in platform-endian order.
1242 jlong_accessor u;
1243 jint* newval = (jint*)value;
1244 u.words[0] = newval[0];
1245 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1246 fvalue.j = u.long_value;
1247 #endif // _LP64
1248
1249 Handle h_obj;
1250 if (!is_static) {
1251 // non-static field accessors have an object, but we need a handle
|
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.inline.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "compiler/compilationPolicy.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/disassembler.hpp"
34 #include "gc/shared/barrierSetNMethod.hpp"
35 #include "gc/shared/collectedHeap.hpp"
36 #include "interpreter/bytecodeTracer.hpp"
37 #include "interpreter/interpreter.hpp"
38 #include "interpreter/interpreterRuntime.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "interpreter/templateTable.hpp"
41 #include "jvm_io.h"
42 #include "logging/log.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.inline.hpp"
47 #include "oops/cpCache.inline.hpp"
48 #include "oops/flatArrayKlass.hpp"
49 #include "oops/flatArrayOop.inline.hpp"
50 #include "oops/inlineKlass.inline.hpp"
51 #include "oops/instanceKlass.inline.hpp"
52 #include "oops/klass.inline.hpp"
53 #include "oops/methodData.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/continuation.hpp"
64 #include "runtime/deoptimization.hpp"
65 #include "runtime/fieldDescriptor.inline.hpp"
66 #include "runtime/frame.inline.hpp"
67 #include "runtime/handles.inline.hpp"
68 #include "runtime/icache.hpp"
69 #include "runtime/interfaceSupport.inline.hpp"
70 #include "runtime/java.hpp"
71 #include "runtime/javaCalls.hpp"
72 #include "runtime/jfieldIDWorkaround.hpp"
73 #include "runtime/osThread.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/stackWatermarkSet.hpp"
76 #include "runtime/stubRoutines.hpp"
77 #include "runtime/synchronizer.inline.hpp"
78 #include "runtime/threadCritical.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/checkedCast.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/globalDefinitions.hpp"
84
85 // Helper class to access current interpreter state
86 class LastFrameAccessor : public StackObj {
87 frame _last_frame;
88 public:
89 LastFrameAccessor(JavaThread* current) {
90 assert(current == Thread::current(), "sanity");
91 _last_frame = current->last_frame();
92 }
93 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
94 Method* method() const { return _last_frame.interpreter_frame_method(); }
95 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
96 int bci() const { return _last_frame.interpreter_frame_bci(); }
97 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
98
99 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
100 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
101
102 // pass method to avoid calling unsafe bcp_to_method (partial fix 4926272)
103 Bytecodes::Code code() const { return Bytecodes::code_at(method(), bcp()); }
211 JRT_END
212
213
214 //------------------------------------------------------------------------------------------------------------------------
215 // Allocation
216
217 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
218 Klass* k = pool->klass_at(index, CHECK);
219 InstanceKlass* klass = InstanceKlass::cast(k);
220
221 // Make sure we are not instantiating an abstract klass
222 klass->check_valid_for_instantiation(true, CHECK);
223
224 // Make sure klass is initialized
225 klass->initialize(CHECK);
226
227 oop obj = klass->allocate_instance(CHECK);
228 current->set_vm_result(obj);
229 JRT_END
230
231 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
232 assert(oopDesc::is_oop(obj), "Sanity check");
233 Handle obj_h(THREAD, obj);
234
235 InstanceKlass* holder = InstanceKlass::cast(entry->field_holder());
236 assert(entry->field_holder()->field_is_flat(entry->field_index()), "Sanity check");
237
238 InlineLayoutInfo* layout_info = holder->inline_layout_info_adr(entry->field_index());
239 InlineKlass* field_vklass = layout_info->klass();
240
241 #ifdef ASSERT
242 fieldDescriptor fd;
243 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
244 assert(found, "Field not found");
245 assert(fd.is_flat(), "Field must be flat");
246 #endif // ASSERT
247
248 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), layout_info->kind(), CHECK);
249 current->set_vm_result(res);
250 JRT_END
251
252 JRT_ENTRY(void, InterpreterRuntime::read_nullable_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
253 assert(oopDesc::is_oop(obj), "Sanity check");
254 assert(entry->has_null_marker(), "Otherwise should not get there");
255 Handle obj_h(THREAD, obj);
256
257 InstanceKlass* holder = entry->field_holder();
258 int field_index = entry->field_index();
259 InlineLayoutInfo* li= holder->inline_layout_info_adr(field_index);
260
261 #ifdef ASSERT
262 fieldDescriptor fd;
263 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
264 assert(found, "Field not found");
265 assert(fd.is_flat(), "Field must be flat");
266 #endif // ASSERT
267
268 InlineKlass* field_vklass = InlineKlass::cast(li->klass());
269 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), li->kind(), CHECK);
270 current->set_vm_result(res);
271
272 JRT_END
273
274 JRT_ENTRY(void, InterpreterRuntime::write_nullable_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
275 assert(oopDesc::is_oop(obj), "Sanity check");
276 Handle obj_h(THREAD, obj);
277 assert(value == nullptr || oopDesc::is_oop(value), "Sanity check");
278 Handle val_h(THREAD, value);
279
280 InstanceKlass* holder = entry->field_holder();
281 InlineLayoutInfo* li = holder->inline_layout_info_adr(entry->field_index());
282 InlineKlass* vk = li->klass();
283 vk->write_value_to_addr(val_h(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind(), true, CHECK);
284 JRT_END
285
286 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
287 oop obj = oopFactory::new_typeArray(type, size, CHECK);
288 current->set_vm_result(obj);
289 JRT_END
290
291
292 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
293 Klass* klass = pool->klass_at(index, CHECK);
294 arrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
295 current->set_vm_result(obj);
296 JRT_END
297
298 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
299 assert(array->is_flatArray(), "Must be");
300 flatArrayOop farray = (flatArrayOop)array;
301 oop res = farray->read_value_from_flat_array(index, CHECK);
302 current->set_vm_result(res);
303 JRT_END
304
305 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
306 assert(array->is_flatArray(), "Must be");
307 flatArrayOop farray = (flatArrayOop)array;
308 farray->write_value_to_flat_array(val, index, CHECK);
309 JRT_END
310
311 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
312 // We may want to pass in more arguments - could make this slightly faster
313 LastFrameAccessor last_frame(current);
314 ConstantPool* constants = last_frame.method()->constants();
315 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
316 Klass* klass = constants->klass_at(i, CHECK);
317 int nof_dims = last_frame.number_of_dimensions();
318 assert(klass->is_klass(), "not a class");
319 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
320
321 // We must create an array of jints to pass to multi_allocate.
322 ResourceMark rm(current);
323 const int small_dims = 10;
324 jint dim_array[small_dims];
325 jint *dims = &dim_array[0];
326 if (nof_dims > small_dims) {
327 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
328 }
329 for (int index = 0; index < nof_dims; index++) {
330 // offset from first_size_address is addressed as local[index]
331 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
332 dims[index] = first_size_address[n];
333 }
334 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
335 current->set_vm_result(obj);
336 JRT_END
337
338
339 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
340 assert(oopDesc::is_oop(obj), "must be a valid oop");
341 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
342 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
343 JRT_END
344
345 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
346 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
347
348 Handle ha(THREAD, aobj);
349 Handle hb(THREAD, bobj);
350 JavaValue result(T_BOOLEAN);
351 JavaCallArguments args;
352 args.push_oop(ha);
353 args.push_oop(hb);
354 methodHandle method(current, Universe::is_substitutable_method());
355 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
356 JavaCalls::call(&result, method, &args, THREAD);
357 if (HAS_PENDING_EXCEPTION) {
358 // Something really bad happened because isSubstitutable() should not throw exceptions
359 // If it is an error, just let it propagate
360 // If it is an exception, wrap it into an InternalError
361 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
362 Handle e(THREAD, PENDING_EXCEPTION);
363 CLEAR_PENDING_EXCEPTION;
364 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
365 }
366 }
367 return result.get_jboolean();
368 JRT_END
369
370 // Quicken instance-of and check-cast bytecodes
371 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
372 // Force resolving; quicken the bytecode
373 LastFrameAccessor last_frame(current);
374 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
375 ConstantPool* cpool = last_frame.method()->constants();
376 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
377 // program we might have seen an unquick'd bytecode in the interpreter but have another
378 // thread quicken the bytecode before we get here.
379 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
380 Klass* klass = cpool->klass_at(which, CHECK);
381 current->set_vm_result_2(klass);
382 JRT_END
383
384
385 //------------------------------------------------------------------------------------------------------------------------
386 // Exceptions
387
388 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
692 // and therefore we don't have the receiver object at our fingertips. (Though,
693 // on some platforms the receiver still resides in a register...). Thus,
694 // we have no choice but print an error message not containing the receiver
695 // type.
696 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
697 Method* missingMethod))
698 ResourceMark rm(current);
699 assert(missingMethod != nullptr, "sanity");
700 methodHandle m(current, missingMethod);
701 LinkResolver::throw_abstract_method_error(m, THREAD);
702 JRT_END
703
704 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
705 Klass* recvKlass,
706 Method* missingMethod))
707 ResourceMark rm(current);
708 methodHandle mh = methodHandle(current, missingMethod);
709 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
710 JRT_END
711
712 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
713 THROW(vmSymbols::java_lang_InstantiationError());
714 JRT_END
715
716
717 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
718 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
719 JRT_END
720
721 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
722 Klass* recvKlass,
723 Klass* interfaceKlass))
724 ResourceMark rm(current);
725 char buf[1000];
726 buf[0] = '\0';
727 jio_snprintf(buf, sizeof(buf),
728 "Class %s does not implement the requested interface %s",
729 recvKlass ? recvKlass->external_name() : "nullptr",
730 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
731 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
732 JRT_END
733
734 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
735 THROW(vmSymbols::java_lang_NullPointerException());
780 // initializer method <init>. If resolution were not inhibited, a putfield
781 // in an initializer method could be resolved in the initializer. Subsequent
782 // putfield instructions to the same field would then use cached information.
783 // As a result, those instructions would not pass through the VM. That is,
784 // checks in resolve_field_access() would not be executed for those instructions
785 // and the required IllegalAccessError would not be thrown.
786 //
787 // Also, we need to delay resolving getstatic and putstatic instructions until the
788 // class is initialized. This is required so that access to the static
789 // field will call the initialization function every time until the class
790 // is completely initialized ala. in 2.17.5 in JVM Specification.
791 InstanceKlass* klass = info.field_holder();
792 bool uninitialized_static = is_static && !klass->is_initialized();
793 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
794 info.has_initialized_final_update();
795 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
796
797 Bytecodes::Code get_code = (Bytecodes::Code)0;
798 Bytecodes::Code put_code = (Bytecodes::Code)0;
799 if (!uninitialized_static) {
800 if (is_static) {
801 get_code = Bytecodes::_getstatic;
802 } else {
803 get_code = Bytecodes::_getfield;
804 }
805 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
806 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
807 }
808 }
809
810 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
811 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
812 info.is_flat(), info.is_null_free_inline_type(),
813 info.has_null_marker());
814
815 entry->fill_in(info.field_holder(), info.offset(),
816 checked_cast<u2>(info.index()), checked_cast<u1>(state),
817 static_cast<u1>(get_code), static_cast<u1>(put_code));
818 }
819
820
821 //------------------------------------------------------------------------------------------------------------------------
822 // Synchronization
823 //
824 // The interpreter's synchronization code is factored out so that it can
825 // be shared by method invocation and synchronized blocks.
826 //%note synchronization_3
827
828 //%note monitor_1
829 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
830 #ifdef ASSERT
831 current->last_frame().interpreter_frame_verify_monitor(elem);
832 #endif
833 Handle h_obj(current, elem->obj());
834 assert(Universe::heap()->is_in_or_null(h_obj()),
841 #endif
842 JRT_END
843
844 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
845 oop obj = elem->obj();
846 assert(Universe::heap()->is_in(obj), "must be an object");
847 // The object could become unlocked through a JNI call, which we have no other checks for.
848 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
849 if (obj->is_unlocked()) {
850 if (CheckJNICalls) {
851 fatal("Object has been unlocked by JNI");
852 }
853 return;
854 }
855 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
856 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
857 // again at method exit or in the case of an exception.
858 elem->set_obj(nullptr);
859 JRT_END
860
861 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
862 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
863 JRT_END
864
865 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
866 // Returns an illegal exception to install into the current thread. The
867 // pending_exception flag is cleared so normal exception handling does not
868 // trigger. Any current installed exception will be overwritten. This
869 // method will be called during an exception unwind.
870
871 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
872 Handle exception(current, current->vm_result());
873 assert(exception() != nullptr, "vm result should be set");
874 current->set_vm_result(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
875 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
876 current->set_vm_result(exception());
877 JRT_END
878
879 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
880 Klass* klass = cast_to_oop(obj)->klass();
881 ResourceMark rm(THREAD);
882 const char* desc = "Cannot synchronize on an instance of value class ";
883 const char* className = klass->external_name();
884 size_t msglen = strlen(desc) + strlen(className) + 1;
885 char* message = NEW_RESOURCE_ARRAY(char, msglen);
886 if (nullptr == message) {
887 // Out of memory: can't create detailed error message
888 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
889 } else {
890 jio_snprintf(message, msglen, "%s%s", desc, className);
891 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
892 }
893 JRT_END
894
895 //------------------------------------------------------------------------------------------------------------------------
896 // Invokes
897
898 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
899 return method->orig_bytecode_at(method->bci_from(bcp));
900 JRT_END
901
902 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
903 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
904 JRT_END
905
906 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
907 JvmtiExport::post_raw_breakpoint(current, method, bcp);
908 JRT_END
909
910 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
911 LastFrameAccessor last_frame(current);
912 // extract receiver from the outgoing argument list if necessary
913 Handle receiver(current, nullptr);
1283 LastFrameAccessor last_frame(current);
1284 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1285 }
1286 JRT_END
1287
1288 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1289 assert(current == JavaThread::current(), "pre-condition");
1290 // This function is called by the interpreter when the return poll found a reason
1291 // to call the VM. The reason could be that we are returning into a not yet safe
1292 // to access frame. We handle that below.
1293 // Note that this path does not check for single stepping, because we do not want
1294 // to single step when unwinding frames for an exception being thrown. Instead,
1295 // such single stepping code will use the safepoint table, which will use the
1296 // InterpreterRuntime::at_safepoint callback.
1297 StackWatermarkSet::before_unwind(current);
1298 JRT_END
1299
1300 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1301 ResolvedFieldEntry *entry))
1302
1303 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1304 // check the access_flags for the field in the klass
1305
1306 InstanceKlass* ik = entry->field_holder();
1307 int index = entry->field_index();
1308 if (!ik->field_status(index).is_access_watched()) return;
1309
1310 bool is_static = (obj == nullptr);
1311 bool is_flat = entry->is_flat();
1312 HandleMark hm(current);
1313
1314 Handle h_obj;
1315 if (!is_static) {
1316 // non-static field accessors have an object, but we need a handle
1317 h_obj = Handle(current, obj);
1318 }
1319 InstanceKlass* field_holder = entry->field_holder(); // HERE
1320 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1321 LastFrameAccessor last_frame(current);
1322 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1323 JRT_END
1324
1325 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1326 ResolvedFieldEntry *entry, jvalue *value))
1327
1328 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1329 InstanceKlass* ik = entry->field_holder();
1330
1331 // check the access_flags for the field in the klass
1332 int index = entry->field_index();
1333 // bail out if field modifications are not watched
1334 if (!ik->field_status(index).is_modification_watched()) return;
1335
1336 char sig_type = '\0';
1337
1338 switch((TosState)entry->tos_state()) {
1339 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1340 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1341 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1342 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1343 case itos: sig_type = JVM_SIGNATURE_INT; break;
1344 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1345 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1346 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1347 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1348 default: ShouldNotReachHere(); return;
1349 }
1350
1351 bool is_static = (obj == nullptr);
1352 bool is_flat = entry->is_flat();
1353
1354 HandleMark hm(current);
1355 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1356 jvalue fvalue;
1357 #ifdef _LP64
1358 fvalue = *value;
1359 #else
1360 // Long/double values are stored unaligned and also noncontiguously with
1361 // tagged stacks. We can't just do a simple assignment even in the non-
1362 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1363 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1364 // We assume that the two halves of longs/doubles are stored in interpreter
1365 // stack slots in platform-endian order.
1366 jlong_accessor u;
1367 jint* newval = (jint*)value;
1368 u.words[0] = newval[0];
1369 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1370 fvalue.j = u.long_value;
1371 #endif // _LP64
1372
1373 Handle h_obj;
1374 if (!is_static) {
1375 // non-static field accessors have an object, but we need a handle
|