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/method.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/continuation.hpp"
59 #include "runtime/deoptimization.hpp"
60 #include "runtime/fieldDescriptor.inline.hpp"
61 #include "runtime/frame.inline.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/icache.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/osThread.hpp"
69 #include "runtime/sharedRuntime.hpp"
70 #include "runtime/stackWatermarkSet.hpp"
71 #include "runtime/stubRoutines.hpp"
72 #include "runtime/synchronizer.hpp"
73 #include "utilities/align.hpp"
74 #include "utilities/checkedCast.hpp"
75 #include "utilities/copy.hpp"
76 #include "utilities/events.hpp"
77 #include "utilities/exceptions.hpp"
78 #if INCLUDE_JFR
79 #include "jfr/jfr.inline.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); }
208 JRT_END
209
210
211 //------------------------------------------------------------------------------------------------------------------------
212 // Allocation
213
214 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
215 Klass* k = pool->klass_at(index, CHECK);
216 InstanceKlass* klass = InstanceKlass::cast(k);
217
218 // Make sure we are not instantiating an abstract klass
219 klass->check_valid_for_instantiation(true, CHECK);
220
221 // Make sure klass is initialized
222 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
223
224 oop obj = klass->allocate_instance(CHECK);
225 current->set_vm_result_oop(obj);
226 JRT_END
227
228
229 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
230 oop obj = oopFactory::new_typeArray(type, size, CHECK);
231 current->set_vm_result_oop(obj);
232 JRT_END
233
234
235 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
236 Klass* klass = pool->klass_at(index, CHECK);
237 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
238 current->set_vm_result_oop(obj);
239 JRT_END
240
241
242 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
243 // We may want to pass in more arguments - could make this slightly faster
244 LastFrameAccessor last_frame(current);
245 ConstantPool* constants = last_frame.method()->constants();
246 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
247 Klass* klass = constants->klass_at(i, CHECK);
248 int nof_dims = last_frame.number_of_dimensions();
249 assert(klass->is_klass(), "not a class");
250 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
251
252 // We must create an array of jints to pass to multi_allocate.
253 ResourceMark rm(current);
254 const int small_dims = 10;
255 jint dim_array[small_dims];
256 jint *dims = &dim_array[0];
257 if (nof_dims > small_dims) {
258 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
259 }
260 for (int index = 0; index < nof_dims; index++) {
261 // offset from first_size_address is addressed as local[index]
262 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
263 dims[index] = first_size_address[n];
264 }
265 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
266 current->set_vm_result_oop(obj);
267 JRT_END
268
269
270 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
271 assert(oopDesc::is_oop(obj), "must be a valid oop");
272 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
273 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
274 JRT_END
275
276
277 // Quicken instance-of and check-cast bytecodes
278 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
279 // Force resolving; quicken the bytecode
280 LastFrameAccessor last_frame(current);
281 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
282 ConstantPool* cpool = last_frame.method()->constants();
283 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
284 // program we might have seen an unquick'd bytecode in the interpreter but have another
285 // thread quicken the bytecode before we get here.
286 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
287 Klass* klass = cpool->klass_at(which, CHECK);
288 current->set_vm_result_metadata(klass);
289 JRT_END
290
291
292 //------------------------------------------------------------------------------------------------------------------------
293 // Exceptions
294
295 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
603 // and therefore we don't have the receiver object at our fingertips. (Though,
604 // on some platforms the receiver still resides in a register...). Thus,
605 // we have no choice but print an error message not containing the receiver
606 // type.
607 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
608 Method* missingMethod))
609 ResourceMark rm(current);
610 assert(missingMethod != nullptr, "sanity");
611 methodHandle m(current, missingMethod);
612 LinkResolver::throw_abstract_method_error(m, THREAD);
613 JRT_END
614
615 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
616 Klass* recvKlass,
617 Method* missingMethod))
618 ResourceMark rm(current);
619 methodHandle mh = methodHandle(current, missingMethod);
620 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
621 JRT_END
622
623
624 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
625 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
626 JRT_END
627
628 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
629 Klass* recvKlass,
630 Klass* interfaceKlass))
631 ResourceMark rm(current);
632 char buf[1000];
633 buf[0] = '\0';
634 jio_snprintf(buf, sizeof(buf),
635 "Class %s does not implement the requested interface %s",
636 recvKlass ? recvKlass->external_name() : "nullptr",
637 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
638 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
639 JRT_END
640
641 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
642 THROW(vmSymbols::java_lang_NullPointerException());
643 JRT_END
682
683 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
684 // to final instance fields with updates originating from a method different than <init>)
685 // is inhibited. A putfield instruction targeting an instance final field must throw
686 // an IllegalAccessError if the instruction is not in an instance
687 // initializer method <init>. If resolution were not inhibited, a putfield
688 // in an initializer method could be resolved in the initializer. Subsequent
689 // putfield instructions to the same field would then use cached information.
690 // As a result, those instructions would not pass through the VM. That is,
691 // checks in resolve_field_access() would not be executed for those instructions
692 // and the required IllegalAccessError would not be thrown.
693 //
694 // Also, we need to delay resolving getstatic and putstatic instructions until the
695 // class is initialized. This is required so that access to the static
696 // field will call the initialization function every time until the class
697 // is completely initialized ala. in 2.17.5 in JVM Specification.
698 InstanceKlass* klass = info.field_holder();
699 bool uninitialized_static = is_static && !klass->is_initialized();
700 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
701 info.has_initialized_final_update();
702 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
703
704 Bytecodes::Code get_code = (Bytecodes::Code)0;
705 Bytecodes::Code put_code = (Bytecodes::Code)0;
706 if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
707 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
708 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
709 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
710 }
711 }
712
713 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
714 entry->fill_in(info, checked_cast<u1>(state),
715 static_cast<u1>(get_code), static_cast<u1>(put_code));
716 }
717
718
719 //------------------------------------------------------------------------------------------------------------------------
720 // Synchronization
721 //
722 // The interpreter's synchronization code is factored out so that it can
723 // be shared by method invocation and synchronized blocks.
724 //%note synchronization_3
725
726 //%note monitor_1
739 #endif
740 JRT_END
741
742 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
743 oop obj = elem->obj();
744 assert(Universe::heap()->is_in(obj), "must be an object");
745 // The object could become unlocked through a JNI call, which we have no other checks for.
746 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
747 if (obj->is_unlocked()) {
748 if (CheckJNICalls) {
749 fatal("Object has been unlocked by JNI");
750 }
751 return;
752 }
753 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
754 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
755 // again at method exit or in the case of an exception.
756 elem->set_obj(nullptr);
757 JRT_END
758
759
760 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
761 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
762 JRT_END
763
764
765 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
766 // Returns an illegal exception to install into the current thread. The
767 // pending_exception flag is cleared so normal exception handling does not
768 // trigger. Any current installed exception will be overwritten. This
769 // method will be called during an exception unwind.
770
771 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
772 Handle exception(current, current->vm_result_oop());
773 assert(exception() != nullptr, "vm result should be set");
774 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
775 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
776 current->set_vm_result_oop(exception());
777 JRT_END
778
779
780 //------------------------------------------------------------------------------------------------------------------------
781 // Invokes
782
783 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
784 return method->orig_bytecode_at(method->bci_from(bcp));
785 JRT_END
786
787 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
788 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
789 JRT_END
790
791 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
792 JvmtiExport::post_raw_breakpoint(current, method, bcp);
793 JRT_END
794
795 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
796 JavaThread* current = THREAD;
797 LastFrameAccessor last_frame(current);
798 // extract receiver from the outgoing argument list if necessary
1178 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1179 // This function is called by the interpreter when the return poll found a reason
1180 // to call the VM. The reason could be that we are returning into a not yet safe
1181 // to access frame. We handle that below.
1182 // Note that this path does not check for single stepping, because we do not want
1183 // to single step when unwinding frames for an exception being thrown. Instead,
1184 // such single stepping code will use the safepoint table, which will use the
1185 // InterpreterRuntime::at_safepoint callback.
1186 StackWatermarkSet::before_unwind(current);
1187 JRT_END
1188
1189 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1190 ResolvedFieldEntry* entry))
1191
1192 // check the access_flags for the field in the klass
1193 InstanceKlass* ik = entry->field_holder();
1194 int index = entry->field_index();
1195 if (!ik->field_status(index).is_access_watched()) return;
1196
1197 bool is_static = (obj == nullptr);
1198 HandleMark hm(current);
1199
1200 Handle h_obj;
1201 if (!is_static) {
1202 // non-static field accessors have an object, but we need a handle
1203 h_obj = Handle(current, obj);
1204 }
1205 InstanceKlass* field_holder = entry->field_holder(); // HERE
1206 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static);
1207 LastFrameAccessor last_frame(current);
1208 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1209 JRT_END
1210
1211 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1212 ResolvedFieldEntry* entry, jvalue* value))
1213
1214 // check the access_flags for the field in the klass
1215 InstanceKlass* ik = entry->field_holder();
1216 int index = entry->field_index();
1217 // bail out if field modifications are not watched
1218 if (!ik->field_status(index).is_modification_watched()) return;
1219
1220 char sig_type = '\0';
1221
1222 switch((TosState)entry->tos_state()) {
1223 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1224 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1225 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1226 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1227 case itos: sig_type = JVM_SIGNATURE_INT; break;
1228 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1229 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1230 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1231 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1232 default: ShouldNotReachHere(); return;
1233 }
1234 bool is_static = (obj == nullptr);
1235
1236 HandleMark hm(current);
1237 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1238 jvalue fvalue;
1239 #ifdef _LP64
1240 fvalue = *value;
1241 #else
1242 // Long/double values are stored unaligned and also noncontiguously with
1243 // tagged stacks. We can't just do a simple assignment even in the non-
1244 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1245 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1246 // We assume that the two halves of longs/doubles are stored in interpreter
1247 // stack slots in platform-endian order.
1248 jlong_accessor u;
1249 jint* newval = (jint*)value;
1250 u.words[0] = newval[0];
1251 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1252 fvalue.j = u.long_value;
1253 #endif // _LP64
1254
1255 Handle h_obj;
1256 if (!is_static) {
1257 // 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/method.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/oopsHierarchy.hpp"
59 #include "oops/symbol.hpp"
60 #include "oops/valuePayload.inline.hpp"
61 #include "prims/jvmtiExport.hpp"
62 #include "prims/methodHandles.hpp"
63 #include "prims/nativeLookup.hpp"
64 #include "runtime/continuation.hpp"
65 #include "runtime/deoptimization.hpp"
66 #include "runtime/fieldDescriptor.inline.hpp"
67 #include "runtime/frame.inline.hpp"
68 #include "runtime/handles.inline.hpp"
69 #include "runtime/icache.hpp"
70 #include "runtime/interfaceSupport.inline.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/osThread.hpp"
75 #include "runtime/sharedRuntime.hpp"
76 #include "runtime/stackWatermarkSet.hpp"
77 #include "runtime/stubRoutines.hpp"
78 #include "runtime/synchronizer.hpp"
79 #include "utilities/align.hpp"
80 #include "utilities/checkedCast.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/events.hpp"
83 #include "utilities/exceptions.hpp"
84 #include "utilities/globalDefinitions.hpp"
85 #if INCLUDE_JFR
86 #include "jfr/jfr.inline.hpp"
87 #endif
88
89 // Helper class to access current interpreter state
90 class LastFrameAccessor : public StackObj {
91 frame _last_frame;
92 public:
93 LastFrameAccessor(JavaThread* current) {
94 assert(current == Thread::current(), "sanity");
95 _last_frame = current->last_frame();
96 }
97 bool is_interpreted_frame() const { return _last_frame.is_interpreted_frame(); }
98 Method* method() const { return _last_frame.interpreter_frame_method(); }
99 address bcp() const { return _last_frame.interpreter_frame_bcp(); }
100 int bci() const { return _last_frame.interpreter_frame_bci(); }
101 address mdp() const { return _last_frame.interpreter_frame_mdp(); }
102
103 void set_bcp(address bcp) { _last_frame.interpreter_frame_set_bcp(bcp); }
104 void set_mdp(address dp) { _last_frame.interpreter_frame_set_mdp(dp); }
215 JRT_END
216
217
218 //------------------------------------------------------------------------------------------------------------------------
219 // Allocation
220
221 JRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* current, ConstantPool* pool, int index))
222 Klass* k = pool->klass_at(index, CHECK);
223 InstanceKlass* klass = InstanceKlass::cast(k);
224
225 // Make sure we are not instantiating an abstract klass
226 klass->check_valid_for_instantiation(true, CHECK);
227
228 // Make sure klass is initialized
229 klass->initialize_preemptable(CHECK_AND_CLEAR_PREEMPTED);
230
231 oop obj = klass->allocate_instance(CHECK);
232 current->set_vm_result_oop(obj);
233 JRT_END
234
235 JRT_BLOCK_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
236 assert(oopDesc::is_oop(obj), "Sanity check");
237
238 FlatFieldPayload payload(instanceOop(obj), entry);
239 if (payload.is_payload_null()) {
240 // If the payload is null return before entring the JRT_BLOCK.
241 current->set_vm_result_oop(nullptr);
242 return;
243 }
244 JRT_BLOCK
245 oop res = payload.read(CHECK);
246 current->set_vm_result_oop(res);
247 JRT_BLOCK_END
248 JRT_END
249
250 JRT_ENTRY(void, InterpreterRuntime::write_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
251 assert(oopDesc::is_oop(obj), "Sanity check");
252 assert(oopDesc::is_oop_or_null(value), "Sanity check");
253
254 FlatFieldPayload payload(instanceOop(obj), entry);
255 payload.write(inlineOop(value), CHECK);
256 JRT_END
257
258 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
259 oop obj = oopFactory::new_typeArray(type, size, CHECK);
260 current->set_vm_result_oop(obj);
261 JRT_END
262
263
264 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
265 Klass* klass = pool->klass_at(index, CHECK);
266 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
267 current->set_vm_result_oop(obj);
268 JRT_END
269
270 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
271 assert(array->is_flatArray(), "Must be");
272 flatArrayOop farray = (flatArrayOop)array;
273 oop res = farray->obj_at(index, CHECK);
274 current->set_vm_result_oop(res);
275 JRT_END
276
277 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
278 assert(array->is_flatArray(), "Must be");
279 flatArrayOop farray = (flatArrayOop)array;
280 farray->obj_at_put(index, val, CHECK);
281 JRT_END
282
283 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
284 // We may want to pass in more arguments - could make this slightly faster
285 LastFrameAccessor last_frame(current);
286 ConstantPool* constants = last_frame.method()->constants();
287 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
288 Klass* klass = constants->klass_at(i, CHECK);
289 int nof_dims = last_frame.number_of_dimensions();
290 assert(klass->is_klass(), "not a class");
291 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
292
293 // We must create an array of jints to pass to multi_allocate.
294 ResourceMark rm(current);
295 const int small_dims = 10;
296 jint dim_array[small_dims];
297 jint *dims = &dim_array[0];
298 if (nof_dims > small_dims) {
299 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
300 }
301 for (int index = 0; index < nof_dims; index++) {
302 // offset from first_size_address is addressed as local[index]
303 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
304 dims[index] = first_size_address[n];
305 }
306 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
307 current->set_vm_result_oop(obj);
308 JRT_END
309
310
311 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
312 assert(oopDesc::is_oop(obj), "must be a valid oop");
313 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
314 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
315 JRT_END
316
317 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
318 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
319
320 Handle ha(THREAD, aobj);
321 Handle hb(THREAD, bobj);
322 JavaValue result(T_BOOLEAN);
323 JavaCallArguments args;
324 args.push_oop(ha);
325 args.push_oop(hb);
326 methodHandle method(current, Universe::is_substitutable_method());
327 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
328 JavaCalls::call(&result, method, &args, THREAD);
329 if (HAS_PENDING_EXCEPTION) {
330 // Something really bad happened because isSubstitutable() should not throw exceptions
331 // If it is an error, just let it propagate
332 // If it is an exception, wrap it into an InternalError
333 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
334 Handle e(THREAD, PENDING_EXCEPTION);
335 CLEAR_PENDING_EXCEPTION;
336 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
337 }
338 }
339 return result.get_jboolean();
340 JRT_END
341
342 // Quicken instance-of and check-cast bytecodes
343 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
344 // Force resolving; quicken the bytecode
345 LastFrameAccessor last_frame(current);
346 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
347 ConstantPool* cpool = last_frame.method()->constants();
348 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
349 // program we might have seen an unquick'd bytecode in the interpreter but have another
350 // thread quicken the bytecode before we get here.
351 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
352 Klass* klass = cpool->klass_at(which, CHECK);
353 current->set_vm_result_metadata(klass);
354 JRT_END
355
356
357 //------------------------------------------------------------------------------------------------------------------------
358 // Exceptions
359
360 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
668 // and therefore we don't have the receiver object at our fingertips. (Though,
669 // on some platforms the receiver still resides in a register...). Thus,
670 // we have no choice but print an error message not containing the receiver
671 // type.
672 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
673 Method* missingMethod))
674 ResourceMark rm(current);
675 assert(missingMethod != nullptr, "sanity");
676 methodHandle m(current, missingMethod);
677 LinkResolver::throw_abstract_method_error(m, THREAD);
678 JRT_END
679
680 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
681 Klass* recvKlass,
682 Method* missingMethod))
683 ResourceMark rm(current);
684 methodHandle mh = methodHandle(current, missingMethod);
685 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
686 JRT_END
687
688 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
689 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
690 JRT_END
691
692 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
693 Klass* recvKlass,
694 Klass* interfaceKlass))
695 ResourceMark rm(current);
696 char buf[1000];
697 buf[0] = '\0';
698 jio_snprintf(buf, sizeof(buf),
699 "Class %s does not implement the requested interface %s",
700 recvKlass ? recvKlass->external_name() : "nullptr",
701 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
702 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
703 JRT_END
704
705 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
706 THROW(vmSymbols::java_lang_NullPointerException());
707 JRT_END
746
747 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
748 // to final instance fields with updates originating from a method different than <init>)
749 // is inhibited. A putfield instruction targeting an instance final field must throw
750 // an IllegalAccessError if the instruction is not in an instance
751 // initializer method <init>. If resolution were not inhibited, a putfield
752 // in an initializer method could be resolved in the initializer. Subsequent
753 // putfield instructions to the same field would then use cached information.
754 // As a result, those instructions would not pass through the VM. That is,
755 // checks in resolve_field_access() would not be executed for those instructions
756 // and the required IllegalAccessError would not be thrown.
757 //
758 // Also, we need to delay resolving getstatic and putstatic instructions until the
759 // class is initialized. This is required so that access to the static
760 // field will call the initialization function every time until the class
761 // is completely initialized ala. in 2.17.5 in JVM Specification.
762 InstanceKlass* klass = info.field_holder();
763 bool uninitialized_static = is_static && !klass->is_initialized();
764 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
765 info.has_initialized_final_update();
766 bool strict_static_final = info.is_strict() && info.is_static() && info.is_final();
767 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
768
769 Bytecodes::Code get_code = (Bytecodes::Code)0;
770 Bytecodes::Code put_code = (Bytecodes::Code)0;
771 if (uninitialized_static && (info.is_strict_static_unset() || strict_static_final)) {
772 // During <clinit>, closely track the state of strict statics.
773 // 1. if we are reading an uninitialized strict static, throw
774 // 2. if we are writing one, clear the "unset" flag
775 //
776 // Note: If we were handling an attempted write of a null to a
777 // null-restricted strict static, we would NOT clear the "unset"
778 // flag.
779 assert(klass->is_being_initialized(), "else should have thrown");
780 assert(klass->is_reentrant_initialization(THREAD),
781 "<clinit> must be running in current thread");
782 klass->notify_strict_static_access(info.index(), is_put, CHECK);
783 assert(!info.is_strict_static_unset(), "after initialization, no unset flags");
784 } else if (!uninitialized_static || VM_Version::supports_fast_class_init_checks()) {
785 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
786 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
787 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
788 }
789 }
790
791 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
792 entry->fill_in(info, checked_cast<u1>(state),
793 static_cast<u1>(get_code), static_cast<u1>(put_code));
794 }
795
796
797 //------------------------------------------------------------------------------------------------------------------------
798 // Synchronization
799 //
800 // The interpreter's synchronization code is factored out so that it can
801 // be shared by method invocation and synchronized blocks.
802 //%note synchronization_3
803
804 //%note monitor_1
817 #endif
818 JRT_END
819
820 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
821 oop obj = elem->obj();
822 assert(Universe::heap()->is_in(obj), "must be an object");
823 // The object could become unlocked through a JNI call, which we have no other checks for.
824 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
825 if (obj->is_unlocked()) {
826 if (CheckJNICalls) {
827 fatal("Object has been unlocked by JNI");
828 }
829 return;
830 }
831 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
832 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
833 // again at method exit or in the case of an exception.
834 elem->set_obj(nullptr);
835 JRT_END
836
837 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
838 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
839 JRT_END
840
841 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
842 // Returns an illegal exception to install into the current thread. The
843 // pending_exception flag is cleared so normal exception handling does not
844 // trigger. Any current installed exception will be overwritten. This
845 // method will be called during an exception unwind.
846
847 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
848 Handle exception(current, current->vm_result_oop());
849 assert(exception() != nullptr, "vm result should be set");
850 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
851 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
852 current->set_vm_result_oop(exception());
853 JRT_END
854
855 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
856 Klass* klass = cast_to_oop(obj)->klass();
857 ResourceMark rm(THREAD);
858 const char* desc = "Cannot synchronize on an instance of value class ";
859 const char* className = klass->external_name();
860 size_t msglen = strlen(desc) + strlen(className) + 1;
861 char* message = NEW_RESOURCE_ARRAY(char, msglen);
862 if (nullptr == message) {
863 // Out of memory: can't create detailed error message
864 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
865 } else {
866 jio_snprintf(message, msglen, "%s%s", desc, className);
867 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
868 }
869 JRT_END
870
871 //------------------------------------------------------------------------------------------------------------------------
872 // Invokes
873
874 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
875 return method->orig_bytecode_at(method->bci_from(bcp));
876 JRT_END
877
878 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
879 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
880 JRT_END
881
882 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
883 JvmtiExport::post_raw_breakpoint(current, method, bcp);
884 JRT_END
885
886 void InterpreterRuntime::resolve_invoke(Bytecodes::Code bytecode, TRAPS) {
887 JavaThread* current = THREAD;
888 LastFrameAccessor last_frame(current);
889 // extract receiver from the outgoing argument list if necessary
1269 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1270 // This function is called by the interpreter when the return poll found a reason
1271 // to call the VM. The reason could be that we are returning into a not yet safe
1272 // to access frame. We handle that below.
1273 // Note that this path does not check for single stepping, because we do not want
1274 // to single step when unwinding frames for an exception being thrown. Instead,
1275 // such single stepping code will use the safepoint table, which will use the
1276 // InterpreterRuntime::at_safepoint callback.
1277 StackWatermarkSet::before_unwind(current);
1278 JRT_END
1279
1280 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1281 ResolvedFieldEntry* entry))
1282
1283 // check the access_flags for the field in the klass
1284 InstanceKlass* ik = entry->field_holder();
1285 int index = entry->field_index();
1286 if (!ik->field_status(index).is_access_watched()) return;
1287
1288 bool is_static = (obj == nullptr);
1289 bool is_flat = entry->is_flat();
1290 HandleMark hm(current);
1291
1292 Handle h_obj;
1293 if (!is_static) {
1294 // non-static field accessors have an object, but we need a handle
1295 h_obj = Handle(current, obj);
1296 }
1297 InstanceKlass* field_holder = entry->field_holder(); // HERE
1298 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1299 LastFrameAccessor last_frame(current);
1300 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1301 JRT_END
1302
1303 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1304 ResolvedFieldEntry* entry, jvalue* value))
1305
1306 // check the access_flags for the field in the klass
1307 InstanceKlass* ik = entry->field_holder();
1308 int index = entry->field_index();
1309 // bail out if field modifications are not watched
1310 if (!ik->field_status(index).is_modification_watched()) return;
1311
1312 char sig_type = '\0';
1313
1314 switch((TosState)entry->tos_state()) {
1315 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1316 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1317 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1318 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1319 case itos: sig_type = JVM_SIGNATURE_INT; break;
1320 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1321 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1322 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1323 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1324 default: ShouldNotReachHere(); return;
1325 }
1326
1327 bool is_static = (obj == nullptr);
1328 bool is_flat = entry->is_flat();
1329
1330 HandleMark hm(current);
1331 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1332 jvalue fvalue;
1333 #ifdef _LP64
1334 fvalue = *value;
1335 #else
1336 // Long/double values are stored unaligned and also noncontiguously with
1337 // tagged stacks. We can't just do a simple assignment even in the non-
1338 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1339 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1340 // We assume that the two halves of longs/doubles are stored in interpreter
1341 // stack slots in platform-endian order.
1342 jlong_accessor u;
1343 jint* newval = (jint*)value;
1344 u.words[0] = newval[0];
1345 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1346 fvalue.j = u.long_value;
1347 #endif // _LP64
1348
1349 Handle h_obj;
1350 if (!is_static) {
1351 // non-static field accessors have an object, but we need a handle
|