41 #include "classfile/modules.hpp"
42 #include "classfile/packageEntry.hpp"
43 #include "classfile/stringTable.hpp"
44 #include "classfile/symbolTable.hpp"
45 #include "classfile/systemDictionary.hpp"
46 #include "classfile/vmClasses.hpp"
47 #include "classfile/vmSymbols.hpp"
48 #include "gc/shared/collectedHeap.inline.hpp"
49 #include "interpreter/bytecode.hpp"
50 #include "interpreter/bytecodeUtils.hpp"
51 #include "jfr/jfrEvents.hpp"
52 #include "jvm.h"
53 #include "logging/log.hpp"
54 #include "memory/oopFactory.hpp"
55 #include "memory/referenceType.hpp"
56 #include "memory/resourceArea.hpp"
57 #include "memory/universe.hpp"
58 #include "oops/access.inline.hpp"
59 #include "oops/constantPool.hpp"
60 #include "oops/fieldStreams.inline.hpp"
61 #include "oops/instanceKlass.hpp"
62 #include "oops/klass.inline.hpp"
63 #include "oops/method.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/recordComponent.hpp"
68 #include "prims/foreignGlobals.hpp"
69 #include "prims/jvm_misc.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/jvmtiThreadState.inline.hpp"
72 #include "prims/stackwalk.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/atomicAccess.hpp"
75 #include "runtime/continuation.hpp"
76 #include "runtime/deoptimization.hpp"
77 #include "runtime/globals_extension.hpp"
78 #include "runtime/handles.inline.hpp"
79 #include "runtime/handshake.hpp"
80 #include "runtime/init.hpp"
81 #include "runtime/interfaceSupport.inline.hpp"
82 #include "runtime/java.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.hpp"
85 #include "runtime/jfieldIDWorkaround.hpp"
86 #include "runtime/jniHandles.inline.hpp"
87 #include "runtime/os.inline.hpp"
396
397 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
398 JVM_END
399
400
401 /*
402 * Return the temporary directory that the VM uses for the attach
403 * and perf data files.
404 *
405 * It is important that this directory is well-known and the
406 * same for all VM instances. It cannot be affected by configuration
407 * variables such as java.io.tmpdir.
408 */
409 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
410 HandleMark hm(THREAD);
411 const char* temp_dir = os::get_temp_directory();
412 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
413 return (jstring) JNIHandles::make_local(THREAD, h());
414 JVM_END
415
416
417 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
418
419 extern volatile jint vm_created;
420
421 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
422 EventShutdown event;
423 if (event.should_commit()) {
424 event.set_reason("Shutdown requested from Java");
425 event.commit();
426 }
427 JVM_END
428
429
430 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
431 before_exit(thread, true);
432 vm_exit(code);
433 JVM_END
434
435
604
605 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
606 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
607 start_index, frames_array_h, THREAD);
608 JVM_END
609
610 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
611 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
612 objArrayHandle frames_array_h(THREAD, fa);
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
615
616 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
617 JVM_END
618
619 // java.lang.Object ///////////////////////////////////////////////
620
621
622 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
623 // as implemented in the classic virtual machine; return 0 if object is null
624 return handle == nullptr ? 0 :
625 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
626 JVM_END
627
628
629 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
630 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
631 ObjectSynchronizer::wait(obj, ms, CHECK);
632 JVM_END
633
634
635 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
636 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
637 ObjectSynchronizer::notify(obj, CHECK);
638 JVM_END
639
640
641 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
642 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
643 ObjectSynchronizer::notifyall(obj, CHECK);
644 JVM_END
645
653 // Just checking that the cloneable flag is set correct
654 if (obj->is_array()) {
655 guarantee(klass->is_cloneable(), "all arrays are cloneable");
656 } else {
657 guarantee(obj->is_instance(), "should be instanceOop");
658 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
659 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
660 }
661 #endif
662
663 // Check if class of obj supports the Cloneable interface.
664 // All arrays are considered to be cloneable (See JLS 20.1.5).
665 // All j.l.r.Reference classes are considered non-cloneable.
666 if (!klass->is_cloneable() ||
667 (klass->is_instance_klass() &&
668 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
669 ResourceMark rm(THREAD);
670 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
671 }
672
673 // Make shallow object copy
674 const size_t size = obj->size();
675 oop new_obj_oop = nullptr;
676 if (obj->is_array()) {
677 const int length = ((arrayOop)obj())->length();
678 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
679 /* do_zero */ true, CHECK_NULL);
680 } else {
681 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
682 }
683
684 HeapAccess<>::clone(obj(), new_obj_oop, size);
685
686 Handle new_obj(THREAD, new_obj_oop);
687 // Caution: this involves a java upcall, so the clone should be
688 // "gc-robust" by this stage.
689 if (klass->has_finalizer()) {
690 assert(obj->is_instance(), "should be instanceOop");
691 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
692 new_obj = Handle(THREAD, new_obj_oop);
1145 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1146 return (jstring) JNIHandles::make_local(THREAD, result);
1147 JVM_END
1148
1149
1150 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1151 JvmtiVMObjectAllocEventCollector oam;
1152 oop mirror = JNIHandles::resolve_non_null(cls);
1153
1154 // Special handling for primitive objects
1155 if (java_lang_Class::is_primitive(mirror)) {
1156 // Primitive objects does not have any interfaces
1157 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1158 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1159 }
1160
1161 Klass* klass = java_lang_Class::as_Klass(mirror);
1162 // Figure size of result array
1163 int size;
1164 if (klass->is_instance_klass()) {
1165 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1166 } else {
1167 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1168 size = 2;
1169 }
1170
1171 // Allocate result array
1172 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1173 objArrayHandle result (THREAD, r);
1174 // Fill in result
1175 if (klass->is_instance_klass()) {
1176 // Regular instance klass, fill in all local interfaces
1177 for (int index = 0; index < size; index++) {
1178 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1179 result->obj_at_put(index, k->java_mirror());
1180 }
1181 } else {
1182 // All arrays implement java.lang.Cloneable and java.io.Serializable
1183 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1184 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1185 }
1186 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1187 JVM_END
1188
1189
1190 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1191 oop mirror = JNIHandles::resolve_non_null(cls);
1192 if (java_lang_Class::is_primitive(mirror)) {
1193 return JNI_FALSE;
1194 }
1195 Klass* k = java_lang_Class::as_Klass(mirror);
1196 return k->is_hidden();
1197 JVM_END
1198
1199
1200 class ScopedValueBindingsResolver {
1201 public:
1202 InstanceKlass* Carrier_klass;
1203 ScopedValueBindingsResolver(JavaThread* THREAD) {
1204 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1205 Carrier_klass = InstanceKlass::cast(k);
1206 }
1207 };
1208
1209 JVM_ENTRY(jobject, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1210 ResourceMark rm(THREAD);
1211 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1212 JvmtiVMObjectAllocEventCollector oam;
1213
1214 static ScopedValueBindingsResolver resolver(THREAD);
1215
1216 // Iterate through Java frames
1217 vframeStream vfst(thread);
1218 for(; !vfst.at_end(); vfst.next()) {
1219 int loc = -1;
1660 }
1661
1662 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1663
1664 // Ensure class is linked
1665 k->link_class(CHECK_NULL);
1666
1667 Array<Method*>* methods = k->methods();
1668 int methods_length = methods->length();
1669
1670 // Save original method_idnum in case of redefinition, which can change
1671 // the idnum of obsolete methods. The new method will have the same idnum
1672 // but if we refresh the methods array, the counts will be wrong.
1673 ResourceMark rm(THREAD);
1674 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1675 int num_methods = 0;
1676
1677 // Select methods matching the criteria.
1678 for (int i = 0; i < methods_length; i++) {
1679 Method* method = methods->at(i);
1680 if (want_constructor && !method->is_object_initializer()) {
1681 continue;
1682 }
1683 if (!want_constructor &&
1684 (method->is_object_initializer() || method->is_static_initializer() ||
1685 method->is_overpass())) {
1686 continue;
1687 }
1688 if (publicOnly && !method->is_public()) {
1689 continue;
1690 }
1691 idnums->push(method->method_idnum());
1692 ++num_methods;
1693 }
1694
1695 // Allocate result
1696 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1697 objArrayHandle result (THREAD, r);
1698
1699 // Now just put the methods that we selected above, but go by their idnum
1700 // in case of redefinition. The methods can be redefined at any safepoint,
1701 // so above when allocating the oop array and below when creating reflect
1702 // objects.
1703 for (int i = 0; i < num_methods; i++) {
1704 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1705 if (method.is_null()) {
1706 // Method may have been deleted and seems this API can handle null
1707 // Otherwise should probably put a method that throws NSME
1708 result->obj_at_put(i, nullptr);
1709 } else {
1710 oop m;
1711 if (want_constructor) {
1712 m = Reflection::new_constructor(method, CHECK_NULL);
1713 } else {
1714 m = Reflection::new_method(method, false, CHECK_NULL);
1715 }
1716 result->obj_at_put(i, m);
1717 }
1718 }
1719
1720 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1721 }
1722
1723 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1724 {
1725 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1726 /*want_constructor*/ false,
1727 vmClasses::reflect_Method_klass(), THREAD);
1728 }
1729 JVM_END
1730
1731 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1952 constantTag tag = cp->tag_at(index);
1953 if (!tag.is_method() && !tag.is_interface_method()) {
1954 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1955 }
1956 int klass_ref = cp->uncached_klass_ref_index_at(index);
1957 Klass* k_o;
1958 if (force_resolution) {
1959 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1960 } else {
1961 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1962 if (k_o == nullptr) return nullptr;
1963 }
1964 InstanceKlass* k = InstanceKlass::cast(k_o);
1965 Symbol* name = cp->uncached_name_ref_at(index);
1966 Symbol* sig = cp->uncached_signature_ref_at(index);
1967 methodHandle m (THREAD, k->find_method(name, sig));
1968 if (m.is_null()) {
1969 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1970 }
1971 oop method;
1972 if (m->is_object_initializer()) {
1973 method = Reflection::new_constructor(m, CHECK_NULL);
1974 } else {
1975 // new_method accepts <clinit> as Method here
1976 method = Reflection::new_method(m, true, CHECK_NULL);
1977 }
1978 return JNIHandles::make_local(THREAD, method);
1979 }
1980
1981 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
1982 {
1983 JvmtiVMObjectAllocEventCollector oam;
1984 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1985 bounds_check(cp, index, CHECK_NULL);
1986 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1987 return res;
1988 }
1989 JVM_END
1990
1991 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1992 {
1993 JvmtiVMObjectAllocEventCollector oam;
1994 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1995 bounds_check(cp, index, CHECK_NULL);
2402
2403
2404 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2405 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2406 Method* method = ik->methods()->at(method_index);
2407 return method->size_of_parameters();
2408 JVM_END
2409
2410
2411 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2412 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2413 Method* method = ik->methods()->at(method_index);
2414 return method->verifier_max_stack();
2415 JVM_END
2416
2417
2418 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2419 ResourceMark rm(THREAD);
2420 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2421 Method* method = ik->methods()->at(method_index);
2422 return method->name() == vmSymbols::object_initializer_name();
2423 JVM_END
2424
2425
2426 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2427 ResourceMark rm(THREAD);
2428 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2429 Method* method = ik->methods()->at(method_index);
2430 return method->is_overpass();
2431 JVM_END
2432
2433 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2434 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2435 Method* method = ik->methods()->at(method_index);
2436 return method->name()->as_utf8();
2437 JVM_END
2438
2439
2440 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2441 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2442 Method* method = ik->methods()->at(method_index);
3196 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3197 void* find_result = os::dll_lookup(handle, name);
3198 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3199 find_result != nullptr ? "Found" : "Failed to find",
3200 name, p2i(handle));
3201 return find_result;
3202 JVM_END
3203
3204
3205 // JNI version ///////////////////////////////////////////////////////////////////////////////
3206
3207 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3208 return Threads::is_supported_jni_version_including_1_1(version);
3209 JVM_END
3210
3211
3212 JVM_LEAF(jboolean, JVM_IsPreviewEnabled(void))
3213 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3214 JVM_END
3215
3216 JVM_LEAF(jboolean, JVM_IsContinuationsSupported(void))
3217 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3218 JVM_END
3219
3220 JVM_LEAF(jboolean, JVM_IsForeignLinkerSupported(void))
3221 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3222 JVM_END
3223
3224 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3225 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3226 JVM_END
3227
3228 // String support ///////////////////////////////////////////////////////////////////////////
3229
3230 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3231 JvmtiVMObjectAllocEventCollector oam;
3232 if (str == nullptr) return nullptr;
3233 oop string = JNIHandles::resolve_non_null(str);
3234 oop result = StringTable::intern(string, CHECK_NULL);
3235 return (jstring) JNIHandles::make_local(THREAD, result);
3275
3276 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3277 Handle loader, jboolean throwError, TRAPS) {
3278 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3279
3280 // Check if we should initialize the class
3281 if (init && klass->is_instance_klass()) {
3282 klass->initialize(CHECK_NULL);
3283 }
3284 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3285 }
3286
3287
3288 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3289
3290 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3291 Handle method_handle;
3292 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3293 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3294 Handle receiver(THREAD, JNIHandles::resolve(obj));
3295 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3296 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3297 jobject res = JNIHandles::make_local(THREAD, result);
3298 if (JvmtiExport::should_post_vm_object_alloc()) {
3299 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3300 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3301 if (java_lang_Class::is_primitive(ret_type)) {
3302 // Only for primitive type vm allocates memory for java object.
3303 // See box() method.
3304 JvmtiExport::post_vm_object_alloc(thread, result);
3305 }
3306 }
3307 return res;
3308 } else {
3309 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3310 }
3311 JVM_END
3312
3313
3314 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3315 oop constructor_mirror = JNIHandles::resolve(c);
3316 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3317 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3318 jobject res = JNIHandles::make_local(THREAD, result);
3319 if (JvmtiExport::should_post_vm_object_alloc()) {
3320 JvmtiExport::post_vm_object_alloc(thread, result);
3321 }
3322 return res;
3323 JVM_END
3324
3325 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3326 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3327 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3328 JVM_END
3329
3330 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3331 jclass caller,
3332 jstring interfaceMethodName,
3333 jobject factoryType,
3334 jobject interfaceMethodType,
3335 jobject implementationMember,
3336 jobject dynamicMethodType,
3533 JvmtiVMObjectAllocEventCollector oam;
3534
3535 // Check if threads is null
3536 if (threads == nullptr) {
3537 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3538 }
3539
3540 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3541 objArrayHandle ah(THREAD, a);
3542 int num_threads = ah->length();
3543 // check if threads is non-empty array
3544 if (num_threads == 0) {
3545 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3546 }
3547
3548 // check if threads is not an array of objects of Thread class
3549 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3550 if (k != vmClasses::Thread_klass()) {
3551 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3552 }
3553
3554 ResourceMark rm(THREAD);
3555
3556 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3557 for (int i = 0; i < num_threads; i++) {
3558 oop thread_obj = ah->obj_at(i);
3559 instanceHandle h(THREAD, (instanceOop) thread_obj);
3560 thread_handle_array->append(h);
3561 }
3562
3563 // The JavaThread references in thread_handle_array are validated
3564 // in VM_ThreadDump::doit().
3565 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3566 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3567
3568 JVM_END
3569
3570 // JVM monitoring and management support
3571 JVM_LEAF(void*, JVM_GetManagement(jint version))
3572 return Management::get_jmm_interface(version);
3573 JVM_END
3574
3575 // com.sun.tools.attach.VirtualMachine agent properties support
3576 //
3577 // Initialize the agent properties with the properties maintained in the VM
3578 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
|
41 #include "classfile/modules.hpp"
42 #include "classfile/packageEntry.hpp"
43 #include "classfile/stringTable.hpp"
44 #include "classfile/symbolTable.hpp"
45 #include "classfile/systemDictionary.hpp"
46 #include "classfile/vmClasses.hpp"
47 #include "classfile/vmSymbols.hpp"
48 #include "gc/shared/collectedHeap.inline.hpp"
49 #include "interpreter/bytecode.hpp"
50 #include "interpreter/bytecodeUtils.hpp"
51 #include "jfr/jfrEvents.hpp"
52 #include "jvm.h"
53 #include "logging/log.hpp"
54 #include "memory/oopFactory.hpp"
55 #include "memory/referenceType.hpp"
56 #include "memory/resourceArea.hpp"
57 #include "memory/universe.hpp"
58 #include "oops/access.inline.hpp"
59 #include "oops/constantPool.hpp"
60 #include "oops/fieldStreams.inline.hpp"
61 #include "oops/flatArrayKlass.hpp"
62 #include "oops/instanceKlass.hpp"
63 #include "oops/klass.inline.hpp"
64 #include "oops/method.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/recordComponent.hpp"
69 #include "oops/refArrayOop.inline.hpp"
70 #include "prims/foreignGlobals.hpp"
71 #include "prims/jvm_misc.hpp"
72 #include "prims/jvmtiExport.hpp"
73 #include "prims/jvmtiThreadState.inline.hpp"
74 #include "prims/stackwalk.hpp"
75 #include "runtime/arguments.hpp"
76 #include "runtime/atomicAccess.hpp"
77 #include "runtime/continuation.hpp"
78 #include "runtime/deoptimization.hpp"
79 #include "runtime/globals_extension.hpp"
80 #include "runtime/handles.inline.hpp"
81 #include "runtime/handshake.hpp"
82 #include "runtime/init.hpp"
83 #include "runtime/interfaceSupport.inline.hpp"
84 #include "runtime/java.hpp"
85 #include "runtime/javaCalls.hpp"
86 #include "runtime/javaThread.hpp"
87 #include "runtime/jfieldIDWorkaround.hpp"
88 #include "runtime/jniHandles.inline.hpp"
89 #include "runtime/os.inline.hpp"
398
399 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
400 JVM_END
401
402
403 /*
404 * Return the temporary directory that the VM uses for the attach
405 * and perf data files.
406 *
407 * It is important that this directory is well-known and the
408 * same for all VM instances. It cannot be affected by configuration
409 * variables such as java.io.tmpdir.
410 */
411 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
412 HandleMark hm(THREAD);
413 const char* temp_dir = os::get_temp_directory();
414 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
415 return (jstring) JNIHandles::make_local(THREAD, h());
416 JVM_END
417
418 static void validate_array_arguments(Klass* elmClass, jint len, TRAPS) {
419 if (len < 0) {
420 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Array length is negative");
421 }
422 elmClass->initialize(CHECK);
423 if (elmClass->is_array_klass() || elmClass->is_identity_class()) {
424 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Element class is not a value class");
425 }
426 if (elmClass->is_abstract()) {
427 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Element class is abstract");
428 }
429 }
430
431 JVM_ENTRY(jarray, JVM_CopyOfSpecialArray(JNIEnv *env, jarray orig, jint from, jint to))
432 oop o = JNIHandles::resolve_non_null(orig);
433 assert(o->is_array(), "Must be");
434 oop array = nullptr;
435 arrayOop org = (arrayOop)o;
436 arrayHandle oh(THREAD, org);
437 ObjArrayKlass* ak = ObjArrayKlass::cast(org->klass());
438 InlineKlass* vk = InlineKlass::cast(ak->element_klass());
439 int len = to - from; // length of the new array
440 if (ak->is_null_free_array_klass()) {
441 if ((len != 0) && (from >= org->length() || to > org->length())) {
442 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Copying of null-free array with uninitialized elements");
443 }
444 }
445 if (org->is_flatArray()) {
446 FlatArrayKlass* fak = FlatArrayKlass::cast(org->klass());
447 LayoutKind lk = fak->layout_kind();
448 ArrayKlass::ArrayProperties props = ArrayKlass::array_properties_from_layout(lk);
449 array = oopFactory::new_flatArray(vk, len, props, lk, CHECK_NULL);
450 arrayHandle ah(THREAD, (arrayOop)array);
451 int end = to < oh()->length() ? to : oh()->length();
452 for (int i = from; i < end; i++) {
453 void* src = ((flatArrayOop)oh())->value_at_addr(i, fak->layout_helper());
454 void* dst = ((flatArrayOop)ah())->value_at_addr(i - from, fak->layout_helper());
455 vk->copy_payload_to_addr(src, dst, lk, false);
456 }
457 array = ah();
458 } else {
459 ArrayKlass::ArrayProperties props = org->is_null_free_array() ? ArrayKlass::ArrayProperties::NULL_RESTRICTED : ArrayKlass::ArrayProperties::DEFAULT;
460 array = oopFactory::new_objArray(vk, len, props, CHECK_NULL);
461 int end = to < oh()->length() ? to : oh()->length();
462 for (int i = from; i < end; i++) {
463 if (i < ((objArrayOop)oh())->length()) {
464 ((objArrayOop)array)->obj_at_put(i - from, ((objArrayOop)oh())->obj_at(i));
465 } else {
466 assert(!ak->is_null_free_array_klass(), "Must be a nullable array");
467 ((objArrayOop)array)->obj_at_put(i - from, nullptr);
468 }
469 }
470 }
471 return (jarray) JNIHandles::make_local(THREAD, array);
472 JVM_END
473
474 JVM_ENTRY(jarray, JVM_NewNullRestrictedNonAtomicArray(JNIEnv *env, jclass elmClass, jint len, jobject initVal))
475 oop mirror = JNIHandles::resolve_non_null(elmClass);
476 oop init = JNIHandles::resolve(initVal);
477 if (init == nullptr) {
478 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Initial value cannot be null");
479 }
480 Handle init_h(THREAD, init);
481 Klass* klass = java_lang_Class::as_Klass(mirror);
482 if (klass != init_h()->klass()) {
483 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Type mismatch between array and initial value");
484 }
485 validate_array_arguments(klass, len, CHECK_NULL);
486 InlineKlass* vk = InlineKlass::cast(klass);
487 ArrayKlass::ArrayProperties props = (ArrayKlass::ArrayProperties)(ArrayKlass::ArrayProperties::NON_ATOMIC | ArrayKlass::ArrayProperties::NULL_RESTRICTED);
488 objArrayOop array = oopFactory::new_objArray(klass, len, props, CHECK_NULL);
489 for (int i = 0; i < len; i++) {
490 array->obj_at_put(i, init_h() /*, CHECK_NULL*/ );
491 }
492 return (jarray) JNIHandles::make_local(THREAD, array);
493 JVM_END
494
495 JVM_ENTRY(jarray, JVM_NewNullRestrictedAtomicArray(JNIEnv *env, jclass elmClass, jint len, jobject initVal))
496 oop mirror = JNIHandles::resolve_non_null(elmClass);
497 oop init = JNIHandles::resolve(initVal);
498 if (init == nullptr) {
499 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Initial value cannot be null");
500 }
501 Handle init_h(THREAD, init);
502 Klass* klass = java_lang_Class::as_Klass(mirror);
503 if (klass != init_h()->klass()) {
504 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Type mismatch between array and initial value");
505 }
506 validate_array_arguments(klass, len, CHECK_NULL);
507 InlineKlass* vk = InlineKlass::cast(klass);
508 ArrayKlass::ArrayProperties props = (ArrayKlass::ArrayProperties)(ArrayKlass::ArrayProperties::NULL_RESTRICTED);
509 objArrayOop array = oopFactory::new_objArray(klass, len, props, CHECK_NULL);
510 for (int i = 0; i < len; i++) {
511 array->obj_at_put(i, init_h() /*, CHECK_NULL*/ );
512 }
513 return (jarray) JNIHandles::make_local(THREAD, array);
514 JVM_END
515
516 JVM_ENTRY(jarray, JVM_NewNullableAtomicArray(JNIEnv *env, jclass elmClass, jint len))
517 oop mirror = JNIHandles::resolve_non_null(elmClass);
518 Klass* klass = java_lang_Class::as_Klass(mirror);
519 klass->initialize(CHECK_NULL);
520 validate_array_arguments(klass, len, CHECK_NULL);
521 InlineKlass* vk = InlineKlass::cast(klass);
522 ArrayKlass::ArrayProperties props = (ArrayKlass::ArrayProperties)(ArrayKlass::ArrayProperties::DEFAULT);
523 objArrayOop array = oopFactory::new_objArray(klass, len, props, CHECK_NULL);
524 return (jarray) JNIHandles::make_local(THREAD, array);
525 JVM_END
526
527 JVM_ENTRY(jboolean, JVM_IsFlatArray(JNIEnv *env, jobject obj))
528 arrayOop oop = arrayOop(JNIHandles::resolve_non_null(obj));
529 return oop->is_flatArray();
530 JVM_END
531
532 JVM_ENTRY(jboolean, JVM_IsNullRestrictedArray(JNIEnv *env, jobject obj))
533 arrayOop oop = arrayOop(JNIHandles::resolve_non_null(obj));
534 return oop->is_null_free_array();
535 JVM_END
536
537 JVM_ENTRY(jboolean, JVM_IsAtomicArray(JNIEnv *env, jobject obj))
538 // There are multiple cases where an array can/must support atomic access:
539 // - the array is a reference array
540 // - the array uses an atomic flat layout: NULLABLE_ATOMIC_FLAT or ATOMIC_FLAT
541 // - the array is flat and its component type is naturally atomic
542 arrayOop oop = arrayOop(JNIHandles::resolve_non_null(obj));
543 if (oop->is_refArray()) return true;
544 if (oop->is_flatArray()) {
545 FlatArrayKlass* fak = FlatArrayKlass::cast(oop->klass());
546 if (LayoutKindHelper::is_atomic_flat(fak->layout_kind())) return true;
547 if (fak->element_klass()->is_naturally_atomic()) return true;
548 }
549 return false;
550 JVM_END
551
552 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
553
554 extern volatile jint vm_created;
555
556 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
557 EventShutdown event;
558 if (event.should_commit()) {
559 event.set_reason("Shutdown requested from Java");
560 event.commit();
561 }
562 JVM_END
563
564
565 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
566 before_exit(thread, true);
567 vm_exit(code);
568 JVM_END
569
570
739
740 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
741 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
742 start_index, frames_array_h, THREAD);
743 JVM_END
744
745 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
746 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
747 objArrayHandle frames_array_h(THREAD, fa);
748 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
749 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
750
751 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
752 JVM_END
753
754 // java.lang.Object ///////////////////////////////////////////////
755
756
757 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
758 // as implemented in the classic virtual machine; return 0 if object is null
759 if (handle == nullptr) {
760 return 0;
761 }
762 oop obj = JNIHandles::resolve_non_null(handle);
763 if (EnableValhalla && obj->klass()->is_inline_klass()) {
764 JavaValue result(T_INT);
765 JavaCallArguments args;
766 Handle ho(THREAD, obj);
767 args.push_oop(ho);
768 methodHandle method(THREAD, UseAltSubstitutabilityMethod
769 ? Universe::value_object_hash_codeAlt_method() : Universe::value_object_hash_code_method());
770 JavaCalls::call(&result, method, &args, THREAD);
771 if (HAS_PENDING_EXCEPTION) {
772 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
773 Handle e(THREAD, PENDING_EXCEPTION);
774 CLEAR_PENDING_EXCEPTION;
775 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in hashCode", e, false);
776 }
777 }
778 return result.get_jint();
779 } else {
780 return checked_cast<jint>(ObjectSynchronizer::FastHashCode(THREAD, obj));
781 }
782 JVM_END
783
784
785 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
786 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
787 ObjectSynchronizer::wait(obj, ms, CHECK);
788 JVM_END
789
790
791 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
792 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
793 ObjectSynchronizer::notify(obj, CHECK);
794 JVM_END
795
796
797 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
798 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
799 ObjectSynchronizer::notifyall(obj, CHECK);
800 JVM_END
801
809 // Just checking that the cloneable flag is set correct
810 if (obj->is_array()) {
811 guarantee(klass->is_cloneable(), "all arrays are cloneable");
812 } else {
813 guarantee(obj->is_instance(), "should be instanceOop");
814 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
815 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
816 }
817 #endif
818
819 // Check if class of obj supports the Cloneable interface.
820 // All arrays are considered to be cloneable (See JLS 20.1.5).
821 // All j.l.r.Reference classes are considered non-cloneable.
822 if (!klass->is_cloneable() ||
823 (klass->is_instance_klass() &&
824 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
825 ResourceMark rm(THREAD);
826 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
827 }
828
829 if (klass->is_inline_klass()) {
830 // Value instances have no identity, so return the current instance instead of allocating a new one
831 // Value classes cannot have finalizers, so the method can return immediately
832 return JNIHandles::make_local(THREAD, obj());
833 }
834
835 // Make shallow object copy
836 const size_t size = obj->size();
837 oop new_obj_oop = nullptr;
838 if (obj->is_array()) {
839 const int length = ((arrayOop)obj())->length();
840 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
841 /* do_zero */ true, CHECK_NULL);
842 } else {
843 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
844 }
845
846 HeapAccess<>::clone(obj(), new_obj_oop, size);
847
848 Handle new_obj(THREAD, new_obj_oop);
849 // Caution: this involves a java upcall, so the clone should be
850 // "gc-robust" by this stage.
851 if (klass->has_finalizer()) {
852 assert(obj->is_instance(), "should be instanceOop");
853 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
854 new_obj = Handle(THREAD, new_obj_oop);
1307 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1308 return (jstring) JNIHandles::make_local(THREAD, result);
1309 JVM_END
1310
1311
1312 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1313 JvmtiVMObjectAllocEventCollector oam;
1314 oop mirror = JNIHandles::resolve_non_null(cls);
1315
1316 // Special handling for primitive objects
1317 if (java_lang_Class::is_primitive(mirror)) {
1318 // Primitive objects does not have any interfaces
1319 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1320 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1321 }
1322
1323 Klass* klass = java_lang_Class::as_Klass(mirror);
1324 // Figure size of result array
1325 int size;
1326 if (klass->is_instance_klass()) {
1327 InstanceKlass* ik = InstanceKlass::cast(klass);
1328 size = ik->local_interfaces()->length();
1329 } else {
1330 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1331 size = 2;
1332 }
1333
1334 // Allocate result array
1335 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1336 objArrayHandle result (THREAD, r);
1337 // Fill in result
1338 if (klass->is_instance_klass()) {
1339 // Regular instance klass, fill in all local interfaces
1340 for (int index = 0; index < size; index++) {
1341 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1342 result->obj_at_put(index, k->java_mirror());
1343 }
1344 } else {
1345 // All arrays implement java.lang.Cloneable and java.io.Serializable
1346 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1347 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1348 }
1349 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1350 JVM_END
1351
1352
1353 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1354 oop mirror = JNIHandles::resolve_non_null(cls);
1355 if (java_lang_Class::is_primitive(mirror)) {
1356 return JNI_FALSE;
1357 }
1358 Klass* k = java_lang_Class::as_Klass(mirror);
1359 return k->is_hidden();
1360 JVM_END
1361
1362 class ScopedValueBindingsResolver {
1363 public:
1364 InstanceKlass* Carrier_klass;
1365 ScopedValueBindingsResolver(JavaThread* THREAD) {
1366 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1367 Carrier_klass = InstanceKlass::cast(k);
1368 }
1369 };
1370
1371 JVM_ENTRY(jobject, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1372 ResourceMark rm(THREAD);
1373 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1374 JvmtiVMObjectAllocEventCollector oam;
1375
1376 static ScopedValueBindingsResolver resolver(THREAD);
1377
1378 // Iterate through Java frames
1379 vframeStream vfst(thread);
1380 for(; !vfst.at_end(); vfst.next()) {
1381 int loc = -1;
1822 }
1823
1824 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1825
1826 // Ensure class is linked
1827 k->link_class(CHECK_NULL);
1828
1829 Array<Method*>* methods = k->methods();
1830 int methods_length = methods->length();
1831
1832 // Save original method_idnum in case of redefinition, which can change
1833 // the idnum of obsolete methods. The new method will have the same idnum
1834 // but if we refresh the methods array, the counts will be wrong.
1835 ResourceMark rm(THREAD);
1836 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1837 int num_methods = 0;
1838
1839 // Select methods matching the criteria.
1840 for (int i = 0; i < methods_length; i++) {
1841 Method* method = methods->at(i);
1842 if (want_constructor && !method->is_object_constructor()) {
1843 continue;
1844 }
1845 if (!want_constructor &&
1846 (method->is_object_constructor() || method->is_class_initializer() ||
1847 method->is_overpass())) {
1848 continue;
1849 }
1850 if (publicOnly && !method->is_public()) {
1851 continue;
1852 }
1853 idnums->push(method->method_idnum());
1854 ++num_methods;
1855 }
1856
1857 // Allocate result
1858 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1859 objArrayHandle result (THREAD, r);
1860
1861 // Now just put the methods that we selected above, but go by their idnum
1862 // in case of redefinition. The methods can be redefined at any safepoint,
1863 // so above when allocating the oop array and below when creating reflect
1864 // objects.
1865 for (int i = 0; i < num_methods; i++) {
1866 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1867 if (method.is_null()) {
1868 // Method may have been deleted and seems this API can handle null
1869 // Otherwise should probably put a method that throws NSME
1870 result->obj_at_put(i, nullptr);
1871 } else {
1872 oop m;
1873 if (want_constructor) {
1874 assert(method->is_object_constructor(), "must be");
1875 m = Reflection::new_constructor(method, CHECK_NULL);
1876 } else {
1877 m = Reflection::new_method(method, false, CHECK_NULL);
1878 }
1879 result->obj_at_put(i, m);
1880 }
1881 }
1882
1883 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1884 }
1885
1886 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1887 {
1888 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1889 /*want_constructor*/ false,
1890 vmClasses::reflect_Method_klass(), THREAD);
1891 }
1892 JVM_END
1893
1894 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2115 constantTag tag = cp->tag_at(index);
2116 if (!tag.is_method() && !tag.is_interface_method()) {
2117 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2118 }
2119 int klass_ref = cp->uncached_klass_ref_index_at(index);
2120 Klass* k_o;
2121 if (force_resolution) {
2122 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2123 } else {
2124 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2125 if (k_o == nullptr) return nullptr;
2126 }
2127 InstanceKlass* k = InstanceKlass::cast(k_o);
2128 Symbol* name = cp->uncached_name_ref_at(index);
2129 Symbol* sig = cp->uncached_signature_ref_at(index);
2130 methodHandle m (THREAD, k->find_method(name, sig));
2131 if (m.is_null()) {
2132 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2133 }
2134 oop method;
2135 if (m->is_object_constructor()) {
2136 method = Reflection::new_constructor(m, CHECK_NULL);
2137 } else {
2138 method = Reflection::new_method(m, true, CHECK_NULL);
2139 }
2140 return JNIHandles::make_local(THREAD, method);
2141 }
2142
2143 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
2144 {
2145 JvmtiVMObjectAllocEventCollector oam;
2146 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2147 bounds_check(cp, index, CHECK_NULL);
2148 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2149 return res;
2150 }
2151 JVM_END
2152
2153 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2154 {
2155 JvmtiVMObjectAllocEventCollector oam;
2156 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157 bounds_check(cp, index, CHECK_NULL);
2564
2565
2566 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2567 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2568 Method* method = ik->methods()->at(method_index);
2569 return method->size_of_parameters();
2570 JVM_END
2571
2572
2573 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2574 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2575 Method* method = ik->methods()->at(method_index);
2576 return method->verifier_max_stack();
2577 JVM_END
2578
2579
2580 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2581 ResourceMark rm(THREAD);
2582 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2583 Method* method = ik->methods()->at(method_index);
2584 return method->is_object_constructor();
2585 JVM_END
2586
2587
2588 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2589 ResourceMark rm(THREAD);
2590 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2591 Method* method = ik->methods()->at(method_index);
2592 return method->is_overpass();
2593 JVM_END
2594
2595 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2596 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2597 Method* method = ik->methods()->at(method_index);
2598 return method->name()->as_utf8();
2599 JVM_END
2600
2601
2602 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2603 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2604 Method* method = ik->methods()->at(method_index);
3358 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3359 void* find_result = os::dll_lookup(handle, name);
3360 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3361 find_result != nullptr ? "Found" : "Failed to find",
3362 name, p2i(handle));
3363 return find_result;
3364 JVM_END
3365
3366
3367 // JNI version ///////////////////////////////////////////////////////////////////////////////
3368
3369 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3370 return Threads::is_supported_jni_version_including_1_1(version);
3371 JVM_END
3372
3373
3374 JVM_LEAF(jboolean, JVM_IsPreviewEnabled(void))
3375 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3376 JVM_END
3377
3378 JVM_LEAF(jboolean, JVM_IsValhallaEnabled(void))
3379 return EnableValhalla ? JNI_TRUE : JNI_FALSE;
3380 JVM_END
3381
3382 JVM_LEAF(jboolean, JVM_IsContinuationsSupported(void))
3383 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3384 JVM_END
3385
3386 JVM_LEAF(jboolean, JVM_IsForeignLinkerSupported(void))
3387 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3388 JVM_END
3389
3390 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3391 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3392 JVM_END
3393
3394 // String support ///////////////////////////////////////////////////////////////////////////
3395
3396 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3397 JvmtiVMObjectAllocEventCollector oam;
3398 if (str == nullptr) return nullptr;
3399 oop string = JNIHandles::resolve_non_null(str);
3400 oop result = StringTable::intern(string, CHECK_NULL);
3401 return (jstring) JNIHandles::make_local(THREAD, result);
3441
3442 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3443 Handle loader, jboolean throwError, TRAPS) {
3444 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3445
3446 // Check if we should initialize the class
3447 if (init && klass->is_instance_klass()) {
3448 klass->initialize(CHECK_NULL);
3449 }
3450 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3451 }
3452
3453
3454 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3455
3456 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3457 Handle method_handle;
3458 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3459 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3460 Handle receiver(THREAD, JNIHandles::resolve(obj));
3461 objArrayHandle args(THREAD, (objArrayOop)JNIHandles::resolve(args0));
3462 assert(args() == nullptr || !args->is_flatArray(), "args are never flat or are they???");
3463
3464 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3465 jobject res = JNIHandles::make_local(THREAD, result);
3466 if (JvmtiExport::should_post_vm_object_alloc()) {
3467 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3468 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3469 if (java_lang_Class::is_primitive(ret_type)) {
3470 // Only for primitive type vm allocates memory for java object.
3471 // See box() method.
3472 JvmtiExport::post_vm_object_alloc(thread, result);
3473 }
3474 }
3475 return res;
3476 } else {
3477 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3478 }
3479 JVM_END
3480
3481
3482 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3483 objArrayHandle args(THREAD, (objArrayOop)JNIHandles::resolve(args0));
3484 assert(args() == nullptr || !args->is_flatArray(), "args are never flat or are they???");
3485 oop constructor_mirror = JNIHandles::resolve(c);
3486 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3487 jobject res = JNIHandles::make_local(THREAD, result);
3488 if (JvmtiExport::should_post_vm_object_alloc()) {
3489 JvmtiExport::post_vm_object_alloc(thread, result);
3490 }
3491 return res;
3492 JVM_END
3493
3494 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3495 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3496 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3497 JVM_END
3498
3499 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3500 jclass caller,
3501 jstring interfaceMethodName,
3502 jobject factoryType,
3503 jobject interfaceMethodType,
3504 jobject implementationMember,
3505 jobject dynamicMethodType,
3702 JvmtiVMObjectAllocEventCollector oam;
3703
3704 // Check if threads is null
3705 if (threads == nullptr) {
3706 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3707 }
3708
3709 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3710 objArrayHandle ah(THREAD, a);
3711 int num_threads = ah->length();
3712 // check if threads is non-empty array
3713 if (num_threads == 0) {
3714 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3715 }
3716
3717 // check if threads is not an array of objects of Thread class
3718 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3719 if (k != vmClasses::Thread_klass()) {
3720 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3721 }
3722 refArrayHandle rah(THREAD, (refArrayOop)ah()); // j.l.Thread is an identity class, arrays are always reference arrays
3723
3724 ResourceMark rm(THREAD);
3725
3726 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3727 for (int i = 0; i < num_threads; i++) {
3728 oop thread_obj = rah->obj_at(i);
3729 instanceHandle h(THREAD, (instanceOop) thread_obj);
3730 thread_handle_array->append(h);
3731 }
3732
3733 // The JavaThread references in thread_handle_array are validated
3734 // in VM_ThreadDump::doit().
3735 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3736 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3737
3738 JVM_END
3739
3740 // JVM monitoring and management support
3741 JVM_LEAF(void*, JVM_GetManagement(jint version))
3742 return Management::get_jmm_interface(version);
3743 JVM_END
3744
3745 // com.sun.tools.attach.VirtualMachine agent properties support
3746 //
3747 // Initialize the agent properties with the properties maintained in the VM
3748 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
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