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/atomicAccess.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 "utilities/align.hpp"
75 #include "utilities/checkedCast.hpp"
76 #include "utilities/copy.hpp"
77 #include "utilities/events.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(CHECK);
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());
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->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile());
715 entry->fill_in(info.field_holder(), info.offset(),
716 checked_cast<u2>(info.index()), checked_cast<u1>(state),
717 static_cast<u1>(get_code), static_cast<u1>(put_code));
718 }
719
720
721 //------------------------------------------------------------------------------------------------------------------------
722 // Synchronization
723 //
724 // The interpreter's synchronization code is factored out so that it can
725 // be shared by method invocation and synchronized blocks.
726 //%note synchronization_3
727
728 //%note monitor_1
729 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
730 #ifdef ASSERT
731 current->last_frame().interpreter_frame_verify_monitor(elem);
732 #endif
733 Handle h_obj(current, elem->obj());
734 assert(Universe::heap()->is_in_or_null(h_obj()),
741 #endif
742 JRT_END
743
744 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
745 oop obj = elem->obj();
746 assert(Universe::heap()->is_in(obj), "must be an object");
747 // The object could become unlocked through a JNI call, which we have no other checks for.
748 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
749 if (obj->is_unlocked()) {
750 if (CheckJNICalls) {
751 fatal("Object has been unlocked by JNI");
752 }
753 return;
754 }
755 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
756 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
757 // again at method exit or in the case of an exception.
758 elem->set_obj(nullptr);
759 JRT_END
760
761
762 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
763 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
764 JRT_END
765
766
767 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
768 // Returns an illegal exception to install into the current thread. The
769 // pending_exception flag is cleared so normal exception handling does not
770 // trigger. Any current installed exception will be overwritten. This
771 // method will be called during an exception unwind.
772
773 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
774 Handle exception(current, current->vm_result_oop());
775 assert(exception() != nullptr, "vm result should be set");
776 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
777 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
778 current->set_vm_result_oop(exception());
779 JRT_END
780
781
782 //------------------------------------------------------------------------------------------------------------------------
783 // Invokes
784
785 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
786 return method->orig_bytecode_at(method->bci_from(bcp));
787 JRT_END
788
789 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
790 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
791 JRT_END
792
793 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
794 JvmtiExport::post_raw_breakpoint(current, method, bcp);
795 JRT_END
796
797 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
798 LastFrameAccessor last_frame(current);
799 // extract receiver from the outgoing argument list if necessary
800 Handle receiver(current, nullptr);
1171 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1172 }
1173 JRT_END
1174
1175 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1176 assert(current == JavaThread::current(), "pre-condition");
1177 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1178 // This function is called by the interpreter when the return poll found a reason
1179 // to call the VM. The reason could be that we are returning into a not yet safe
1180 // to access frame. We handle that below.
1181 // Note that this path does not check for single stepping, because we do not want
1182 // to single step when unwinding frames for an exception being thrown. Instead,
1183 // such single stepping code will use the safepoint table, which will use the
1184 // InterpreterRuntime::at_safepoint callback.
1185 StackWatermarkSet::before_unwind(current);
1186 JRT_END
1187
1188 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1189 ResolvedFieldEntry *entry))
1190
1191 // check the access_flags for the field in the klass
1192
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 InstanceKlass* ik = entry->field_holder();
1215
1216 // check the access_flags for the field in the klass
1217 int index = entry->field_index();
1218 // bail out if field modifications are not watched
1219 if (!ik->field_status(index).is_modification_watched()) return;
1220
1221 char sig_type = '\0';
1222
1223 switch((TosState)entry->tos_state()) {
1224 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1225 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1226 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1227 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1228 case itos: sig_type = JVM_SIGNATURE_INT; break;
1229 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1230 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1231 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1232 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1233 default: ShouldNotReachHere(); return;
1234 }
1235 bool is_static = (obj == nullptr);
1236
1237 HandleMark hm(current);
1238 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static);
1239 jvalue fvalue;
1240 #ifdef _LP64
1241 fvalue = *value;
1242 #else
1243 // Long/double values are stored unaligned and also noncontiguously with
1244 // tagged stacks. We can't just do a simple assignment even in the non-
1245 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1246 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1247 // We assume that the two halves of longs/doubles are stored in interpreter
1248 // stack slots in platform-endian order.
1249 jlong_accessor u;
1250 jint* newval = (jint*)value;
1251 u.words[0] = newval[0];
1252 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1253 fvalue.j = u.long_value;
1254 #endif // _LP64
1255
1256 Handle h_obj;
1257 if (!is_static) {
1258 // 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/symbol.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/methodHandles.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "runtime/atomicAccess.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 "utilities/align.hpp"
79 #include "utilities/checkedCast.hpp"
80 #include "utilities/copy.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/globalDefinitions.hpp"
83 #if INCLUDE_JFR
84 #include "jfr/jfr.inline.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); }
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 oop obj = klass->allocate_instance(CHECK);
230 current->set_vm_result_oop(obj);
231 JRT_END
232
233 JRT_ENTRY(void, InterpreterRuntime::read_flat_field(JavaThread* current, oopDesc* obj, ResolvedFieldEntry* entry))
234 assert(oopDesc::is_oop(obj), "Sanity check");
235 Handle obj_h(THREAD, obj);
236
237 InstanceKlass* holder = InstanceKlass::cast(entry->field_holder());
238 assert(entry->field_holder()->field_is_flat(entry->field_index()), "Sanity check");
239
240 InlineLayoutInfo* layout_info = holder->inline_layout_info_adr(entry->field_index());
241 InlineKlass* field_vklass = layout_info->klass();
242
243 #ifdef ASSERT
244 fieldDescriptor fd;
245 bool found = holder->find_field_from_offset(entry->field_offset(), false, &fd);
246 assert(found, "Field not found");
247 assert(fd.is_flat(), "Field must be flat");
248 #endif // ASSERT
249
250 oop res = field_vklass->read_payload_from_addr(obj_h(), entry->field_offset(), layout_info->kind(), CHECK);
251 current->set_vm_result_oop(res);
252 JRT_END
253
254 JRT_ENTRY(void, InterpreterRuntime::write_flat_field(JavaThread* current, oopDesc* obj, oopDesc* value, ResolvedFieldEntry* entry))
255 assert(oopDesc::is_oop(obj), "Sanity check");
256 Handle obj_h(THREAD, obj);
257 assert(value == nullptr || oopDesc::is_oop(value), "Sanity check");
258 Handle val_h(THREAD, value);
259
260 InstanceKlass* holder = entry->field_holder();
261 InlineLayoutInfo* li = holder->inline_layout_info_adr(entry->field_index());
262 InlineKlass* vk = li->klass();
263 vk->write_value_to_addr(val_h(), ((char*)(oopDesc*)obj_h()) + entry->field_offset(), li->kind(), true, CHECK);
264 JRT_END
265
266 JRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* current, BasicType type, jint size))
267 oop obj = oopFactory::new_typeArray(type, size, CHECK);
268 current->set_vm_result_oop(obj);
269 JRT_END
270
271
272 JRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* current, ConstantPool* pool, int index, jint size))
273 Klass* klass = pool->klass_at(index, CHECK);
274 arrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
275 current->set_vm_result_oop(obj);
276 JRT_END
277
278 JRT_ENTRY(void, InterpreterRuntime::flat_array_load(JavaThread* current, arrayOopDesc* array, int index))
279 assert(array->is_flatArray(), "Must be");
280 flatArrayOop farray = (flatArrayOop)array;
281 oop res = farray->obj_at(index, CHECK);
282 current->set_vm_result_oop(res);
283 JRT_END
284
285 JRT_ENTRY(void, InterpreterRuntime::flat_array_store(JavaThread* current, oopDesc* val, arrayOopDesc* array, int index))
286 assert(array->is_flatArray(), "Must be");
287 flatArrayOop farray = (flatArrayOop)array;
288 farray->obj_at_put(index, val, CHECK);
289 JRT_END
290
291 JRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* current, jint* first_size_address))
292 // We may want to pass in more arguments - could make this slightly faster
293 LastFrameAccessor last_frame(current);
294 ConstantPool* constants = last_frame.method()->constants();
295 int i = last_frame.get_index_u2(Bytecodes::_multianewarray);
296 Klass* klass = constants->klass_at(i, CHECK);
297 int nof_dims = last_frame.number_of_dimensions();
298 assert(klass->is_klass(), "not a class");
299 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
300
301 // We must create an array of jints to pass to multi_allocate.
302 ResourceMark rm(current);
303 const int small_dims = 10;
304 jint dim_array[small_dims];
305 jint *dims = &dim_array[0];
306 if (nof_dims > small_dims) {
307 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
308 }
309 for (int index = 0; index < nof_dims; index++) {
310 // offset from first_size_address is addressed as local[index]
311 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
312 dims[index] = first_size_address[n];
313 }
314 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
315 current->set_vm_result_oop(obj);
316 JRT_END
317
318
319 JRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* current, oopDesc* obj))
320 assert(oopDesc::is_oop(obj), "must be a valid oop");
321 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
322 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
323 JRT_END
324
325 JRT_ENTRY(jboolean, InterpreterRuntime::is_substitutable(JavaThread* current, oopDesc* aobj, oopDesc* bobj))
326 assert(oopDesc::is_oop(aobj) && oopDesc::is_oop(bobj), "must be valid oops");
327
328 Handle ha(THREAD, aobj);
329 Handle hb(THREAD, bobj);
330 JavaValue result(T_BOOLEAN);
331 JavaCallArguments args;
332 args.push_oop(ha);
333 args.push_oop(hb);
334 methodHandle method(current, UseAltSubstitutabilityMethod ? Universe::is_substitutableAlt_method() : Universe::is_substitutable_method());
335 method->method_holder()->initialize(CHECK_false); // Ensure class ValueObjectMethods is initialized
336 JavaCalls::call(&result, method, &args, THREAD);
337 if (HAS_PENDING_EXCEPTION) {
338 // Something really bad happened because isSubstitutable() should not throw exceptions
339 // If it is an error, just let it propagate
340 // If it is an exception, wrap it into an InternalError
341 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
342 Handle e(THREAD, PENDING_EXCEPTION);
343 CLEAR_PENDING_EXCEPTION;
344 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in substitutability test", e, false);
345 }
346 }
347 return result.get_jboolean();
348 JRT_END
349
350 // Quicken instance-of and check-cast bytecodes
351 JRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* current))
352 // Force resolving; quicken the bytecode
353 LastFrameAccessor last_frame(current);
354 int which = last_frame.get_index_u2(Bytecodes::_checkcast);
355 ConstantPool* cpool = last_frame.method()->constants();
356 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
357 // program we might have seen an unquick'd bytecode in the interpreter but have another
358 // thread quicken the bytecode before we get here.
359 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
360 Klass* klass = cpool->klass_at(which, CHECK);
361 current->set_vm_result_metadata(klass);
362 JRT_END
363
364
365 //------------------------------------------------------------------------------------------------------------------------
366 // Exceptions
367
368 void InterpreterRuntime::note_trap_inner(JavaThread* current, int reason,
676 // and therefore we don't have the receiver object at our fingertips. (Though,
677 // on some platforms the receiver still resides in a register...). Thus,
678 // we have no choice but print an error message not containing the receiver
679 // type.
680 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorWithMethod(JavaThread* current,
681 Method* missingMethod))
682 ResourceMark rm(current);
683 assert(missingMethod != nullptr, "sanity");
684 methodHandle m(current, missingMethod);
685 LinkResolver::throw_abstract_method_error(m, THREAD);
686 JRT_END
687
688 JRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodErrorVerbose(JavaThread* current,
689 Klass* recvKlass,
690 Method* missingMethod))
691 ResourceMark rm(current);
692 methodHandle mh = methodHandle(current, missingMethod);
693 LinkResolver::throw_abstract_method_error(mh, recvKlass, THREAD);
694 JRT_END
695
696 JRT_ENTRY(void, InterpreterRuntime::throw_InstantiationError(JavaThread* current))
697 THROW(vmSymbols::java_lang_InstantiationError());
698 JRT_END
699
700
701 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* current))
702 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
703 JRT_END
704
705 JRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeErrorVerbose(JavaThread* current,
706 Klass* recvKlass,
707 Klass* interfaceKlass))
708 ResourceMark rm(current);
709 char buf[1000];
710 buf[0] = '\0';
711 jio_snprintf(buf, sizeof(buf),
712 "Class %s does not implement the requested interface %s",
713 recvKlass ? recvKlass->external_name() : "nullptr",
714 interfaceKlass ? interfaceKlass->external_name() : "nullptr");
715 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
716 JRT_END
717
718 JRT_ENTRY(void, InterpreterRuntime::throw_NullPointerException(JavaThread* current))
719 THROW(vmSymbols::java_lang_NullPointerException());
759
760 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
761 // to final instance fields with updates originating from a method different than <init>)
762 // is inhibited. A putfield instruction targeting an instance final field must throw
763 // an IllegalAccessError if the instruction is not in an instance
764 // initializer method <init>. If resolution were not inhibited, a putfield
765 // in an initializer method could be resolved in the initializer. Subsequent
766 // putfield instructions to the same field would then use cached information.
767 // As a result, those instructions would not pass through the VM. That is,
768 // checks in resolve_field_access() would not be executed for those instructions
769 // and the required IllegalAccessError would not be thrown.
770 //
771 // Also, we need to delay resolving getstatic and putstatic instructions until the
772 // class is initialized. This is required so that access to the static
773 // field will call the initialization function every time until the class
774 // is completely initialized ala. in 2.17.5 in JVM Specification.
775 InstanceKlass* klass = info.field_holder();
776 bool uninitialized_static = is_static && !klass->is_initialized();
777 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
778 info.has_initialized_final_update();
779 bool strict_static_final = info.is_strict() && info.is_static() && info.is_final();
780 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
781
782 Bytecodes::Code get_code = (Bytecodes::Code)0;
783 Bytecodes::Code put_code = (Bytecodes::Code)0;
784 if (!uninitialized_static) {
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 assert(!info.is_strict_static_unset(), "after initialization, no unset flags");
790 } else if (is_static && (info.is_strict_static_unset() || strict_static_final)) {
791 // During <clinit>, closely track the state of strict statics.
792 // 1. if we are reading an uninitialized strict static, throw
793 // 2. if we are writing one, clear the "unset" flag
794 //
795 // Note: If we were handling an attempted write of a null to a
796 // null-restricted strict static, we would NOT clear the "unset"
797 // flag.
798 assert(klass->is_being_initialized(), "else should have thrown");
799 assert(klass->is_reentrant_initialization(THREAD),
800 "<clinit> must be running in current thread");
801 klass->notify_strict_static_access(info.index(), is_put, CHECK);
802 }
803
804 ResolvedFieldEntry* entry = pool->resolved_field_entry_at(field_index);
805 entry->set_flags(info.access_flags().is_final(), info.access_flags().is_volatile(),
806 info.is_flat(), info.is_null_free_inline_type(),
807 info.has_null_marker());
808
809 entry->fill_in(info.field_holder(), info.offset(),
810 checked_cast<u2>(info.index()), checked_cast<u1>(state),
811 static_cast<u1>(get_code), static_cast<u1>(put_code));
812 }
813
814
815 //------------------------------------------------------------------------------------------------------------------------
816 // Synchronization
817 //
818 // The interpreter's synchronization code is factored out so that it can
819 // be shared by method invocation and synchronized blocks.
820 //%note synchronization_3
821
822 //%note monitor_1
823 JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
824 #ifdef ASSERT
825 current->last_frame().interpreter_frame_verify_monitor(elem);
826 #endif
827 Handle h_obj(current, elem->obj());
828 assert(Universe::heap()->is_in_or_null(h_obj()),
835 #endif
836 JRT_END
837
838 JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
839 oop obj = elem->obj();
840 assert(Universe::heap()->is_in(obj), "must be an object");
841 // The object could become unlocked through a JNI call, which we have no other checks for.
842 // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
843 if (obj->is_unlocked()) {
844 if (CheckJNICalls) {
845 fatal("Object has been unlocked by JNI");
846 }
847 return;
848 }
849 ObjectSynchronizer::exit(obj, elem->lock(), JavaThread::current());
850 // Free entry. If it is not cleared, the exception handling code will try to unlock the monitor
851 // again at method exit or in the case of an exception.
852 elem->set_obj(nullptr);
853 JRT_END
854
855 JRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* current))
856 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
857 JRT_END
858
859 JRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* current))
860 // Returns an illegal exception to install into the current thread. The
861 // pending_exception flag is cleared so normal exception handling does not
862 // trigger. Any current installed exception will be overwritten. This
863 // method will be called during an exception unwind.
864
865 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
866 Handle exception(current, current->vm_result_oop());
867 assert(exception() != nullptr, "vm result should be set");
868 current->set_vm_result_oop(nullptr); // clear vm result before continuing (may cause memory leaks and assert failures)
869 exception = get_preinitialized_exception(vmClasses::IllegalMonitorStateException_klass(), CATCH);
870 current->set_vm_result_oop(exception());
871 JRT_END
872
873 JRT_ENTRY(void, InterpreterRuntime::throw_identity_exception(JavaThread* current, oopDesc* obj))
874 Klass* klass = cast_to_oop(obj)->klass();
875 ResourceMark rm(THREAD);
876 const char* desc = "Cannot synchronize on an instance of value class ";
877 const char* className = klass->external_name();
878 size_t msglen = strlen(desc) + strlen(className) + 1;
879 char* message = NEW_RESOURCE_ARRAY(char, msglen);
880 if (nullptr == message) {
881 // Out of memory: can't create detailed error message
882 THROW_MSG(vmSymbols::java_lang_IdentityException(), className);
883 } else {
884 jio_snprintf(message, msglen, "%s%s", desc, className);
885 THROW_MSG(vmSymbols::java_lang_IdentityException(), message);
886 }
887 JRT_END
888
889 //------------------------------------------------------------------------------------------------------------------------
890 // Invokes
891
892 JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* current, Method* method, address bcp))
893 return method->orig_bytecode_at(method->bci_from(bcp));
894 JRT_END
895
896 JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* current, Method* method, address bcp, Bytecodes::Code new_code))
897 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
898 JRT_END
899
900 JRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* current, Method* method, address bcp))
901 JvmtiExport::post_raw_breakpoint(current, method, bcp);
902 JRT_END
903
904 void InterpreterRuntime::resolve_invoke(JavaThread* current, Bytecodes::Code bytecode) {
905 LastFrameAccessor last_frame(current);
906 // extract receiver from the outgoing argument list if necessary
907 Handle receiver(current, nullptr);
1278 JvmtiExport::at_single_stepping_point(current, last_frame.method(), last_frame.bcp());
1279 }
1280 JRT_END
1281
1282 JRT_LEAF(void, InterpreterRuntime::at_unwind(JavaThread* current))
1283 assert(current == JavaThread::current(), "pre-condition");
1284 JFR_ONLY(Jfr::check_and_process_sample_request(current);)
1285 // This function is called by the interpreter when the return poll found a reason
1286 // to call the VM. The reason could be that we are returning into a not yet safe
1287 // to access frame. We handle that below.
1288 // Note that this path does not check for single stepping, because we do not want
1289 // to single step when unwinding frames for an exception being thrown. Instead,
1290 // such single stepping code will use the safepoint table, which will use the
1291 // InterpreterRuntime::at_safepoint callback.
1292 StackWatermarkSet::before_unwind(current);
1293 JRT_END
1294
1295 JRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread* current, oopDesc* obj,
1296 ResolvedFieldEntry *entry))
1297
1298 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1299 // check the access_flags for the field in the klass
1300
1301 InstanceKlass* ik = entry->field_holder();
1302 int index = entry->field_index();
1303 if (!ik->field_status(index).is_access_watched()) return;
1304
1305 bool is_static = (obj == nullptr);
1306 bool is_flat = entry->is_flat();
1307 HandleMark hm(current);
1308
1309 Handle h_obj;
1310 if (!is_static) {
1311 // non-static field accessors have an object, but we need a handle
1312 h_obj = Handle(current, obj);
1313 }
1314 InstanceKlass* field_holder = entry->field_holder(); // HERE
1315 jfieldID fid = jfieldIDWorkaround::to_jfieldID(field_holder, entry->field_offset(), is_static, is_flat);
1316 LastFrameAccessor last_frame(current);
1317 JvmtiExport::post_field_access(current, last_frame.method(), last_frame.bcp(), field_holder, h_obj, fid);
1318 JRT_END
1319
1320 JRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread* current, oopDesc* obj,
1321 ResolvedFieldEntry *entry, jvalue *value))
1322
1323 assert(entry->is_valid(), "Invalid ResolvedFieldEntry");
1324 InstanceKlass* ik = entry->field_holder();
1325
1326 // check the access_flags for the field in the klass
1327 int index = entry->field_index();
1328 // bail out if field modifications are not watched
1329 if (!ik->field_status(index).is_modification_watched()) return;
1330
1331 char sig_type = '\0';
1332
1333 switch((TosState)entry->tos_state()) {
1334 case btos: sig_type = JVM_SIGNATURE_BYTE; break;
1335 case ztos: sig_type = JVM_SIGNATURE_BOOLEAN; break;
1336 case ctos: sig_type = JVM_SIGNATURE_CHAR; break;
1337 case stos: sig_type = JVM_SIGNATURE_SHORT; break;
1338 case itos: sig_type = JVM_SIGNATURE_INT; break;
1339 case ftos: sig_type = JVM_SIGNATURE_FLOAT; break;
1340 case atos: sig_type = JVM_SIGNATURE_CLASS; break;
1341 case ltos: sig_type = JVM_SIGNATURE_LONG; break;
1342 case dtos: sig_type = JVM_SIGNATURE_DOUBLE; break;
1343 default: ShouldNotReachHere(); return;
1344 }
1345
1346 bool is_static = (obj == nullptr);
1347 bool is_flat = entry->is_flat();
1348
1349 HandleMark hm(current);
1350 jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, entry->field_offset(), is_static, is_flat);
1351 jvalue fvalue;
1352 #ifdef _LP64
1353 fvalue = *value;
1354 #else
1355 // Long/double values are stored unaligned and also noncontiguously with
1356 // tagged stacks. We can't just do a simple assignment even in the non-
1357 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1358 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1359 // We assume that the two halves of longs/doubles are stored in interpreter
1360 // stack slots in platform-endian order.
1361 jlong_accessor u;
1362 jint* newval = (jint*)value;
1363 u.words[0] = newval[0];
1364 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1365 fvalue.j = u.long_value;
1366 #endif // _LP64
1367
1368 Handle h_obj;
1369 if (!is_static) {
1370 // non-static field accessors have an object, but we need a handle
|