1 /*
2 * Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
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/classFileStream.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/classLoadInfo.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "jfr/jfrEvents.hpp"
32 #include "jni.h"
33 #include "jvm.h"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/access.inline.hpp"
37 #include "oops/fieldStreams.inline.hpp"
38 #include "oops/instanceKlass.inline.hpp"
39 #include "oops/klass.inline.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/typeArrayOop.inline.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "prims/unsafe.hpp"
45 #include "runtime/globals.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.inline.hpp"
48 #include "runtime/javaThread.inline.hpp"
49 #include "runtime/jniHandles.inline.hpp"
50 #include "runtime/orderAccess.hpp"
51 #include "runtime/reflection.hpp"
52 #include "runtime/sharedRuntime.hpp"
53 #include "runtime/stubRoutines.hpp"
54 #include "runtime/threadSMR.hpp"
55 #include "runtime/vm_version.hpp"
56 #include "runtime/vmOperations.hpp"
57 #include "sanitizers/ub.hpp"
58 #include "services/threadService.hpp"
59 #include "utilities/align.hpp"
60 #include "utilities/copy.hpp"
61 #include "utilities/dtrace.hpp"
62 #include "utilities/macros.hpp"
63
64 /**
197 jboolean normalize(jboolean x) {
198 return (x & 1) != 0;
199 }
200
201 public:
202 MemoryAccess(JavaThread* thread, jobject obj, jlong offset)
203 : _thread(thread), _obj(JNIHandles::resolve(obj)), _offset((ptrdiff_t)offset) {
204 assert_field_offset_sane(_obj, offset);
205 }
206
207 T get() {
208 GuardUnsafeAccess guard(_thread);
209 return normalize(*addr());
210 }
211
212 // we use this method at some places for writing to 0 e.g. to cause a crash;
213 // ubsan does not know that this is the desired behavior
214 ATTRIBUTE_NO_UBSAN
215 void put(T x) {
216 GuardUnsafeAccess guard(_thread);
217 *addr() = normalize(x);
218 }
219
220
221 T get_volatile() {
222 GuardUnsafeAccess guard(_thread);
223 volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
224 return normalize(ret);
225 }
226
227 void put_volatile(T x) {
228 GuardUnsafeAccess guard(_thread);
229 RawAccess<MO_SEQ_CST>::store(addr(), normalize(x));
230 }
231 };
232
233 // These functions allow a null base pointer with an arbitrary address.
234 // But if the base pointer is non-null, the offset should make some sense.
235 // That is, it should be in the range [0, MAX_OBJECT_SIZE].
236 UNSAFE_ENTRY(jobject, Unsafe_GetReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
237 oop p = JNIHandles::resolve(obj);
238 assert_field_offset_sane(p, offset);
239 oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
240 return JNIHandles::make_local(THREAD, v);
241 } UNSAFE_END
242
243 UNSAFE_ENTRY(void, Unsafe_PutReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
244 oop x = JNIHandles::resolve(x_h);
245 oop p = JNIHandles::resolve(obj);
246 assert_field_offset_sane(p, offset);
247 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
248 } UNSAFE_END
249
250 UNSAFE_ENTRY(jobject, Unsafe_GetReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
251 oop p = JNIHandles::resolve(obj);
252 assert_field_offset_sane(p, offset);
253 oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
254 return JNIHandles::make_local(THREAD, v);
255 } UNSAFE_END
256
257 UNSAFE_ENTRY(void, Unsafe_PutReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
258 oop x = JNIHandles::resolve(x_h);
259 oop p = JNIHandles::resolve(obj);
260 assert_field_offset_sane(p, offset);
261 HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
262 } UNSAFE_END
263
264 UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
265 oop v = *(oop*) (address) addr;
266 return JNIHandles::make_local(THREAD, v);
267 } UNSAFE_END
268
269 #define DEFINE_GETSETOOP(java_type, Type) \
560 InstanceKlass* k = InstanceKlass::cast(klass);
561 k->initialize(CHECK);
562 }
563 }
564 UNSAFE_END
565
566 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) {
567 assert(clazz != nullptr, "clazz must not be null");
568
569 oop mirror = JNIHandles::resolve_non_null(clazz);
570 Klass* klass = java_lang_Class::as_Klass(mirror);
571
572 if (klass != nullptr && klass->should_be_initialized()) {
573 return true;
574 }
575
576 return false;
577 }
578 UNSAFE_END
579
580 static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) {
581 assert(clazz != nullptr, "clazz must not be null");
582
583 oop mirror = JNIHandles::resolve_non_null(clazz);
584 Klass* k = java_lang_Class::as_Klass(mirror);
585
586 if (k == nullptr || !k->is_array_klass()) {
587 THROW(vmSymbols::java_lang_InvalidClassException());
588 } else if (k->is_objArray_klass()) {
589 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
590 scale = heapOopSize;
591 } else if (k->is_typeArray_klass()) {
592 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
593 base = tak->array_header_in_bytes();
594 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
595 scale = (1 << tak->log2_element_size());
596 } else {
597 ShouldNotReachHere();
598 }
599 }
600
601 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) {
602 int base = 0, scale = 0;
603 getBaseAndScale(base, scale, clazz, CHECK_0);
604
605 return field_offset_from_byte_offset(base);
606 } UNSAFE_END
607
608
609 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) {
610 int base = 0, scale = 0;
611 getBaseAndScale(base, scale, clazz, CHECK_0);
612
613 // This VM packs both fields and array elements down to the byte.
614 // But watch out: If this changes, so that array references for
615 // a given primitive type (say, T_BOOLEAN) use different memory units
616 // than fields, this method MUST return zero for such arrays.
617 // For example, the VM used to store sub-word sized fields in full
618 // words in the object layout, so that accessors like getByte(Object,int)
619 // did not really do what one might expect for arrays. Therefore,
620 // this function used to report a zero scale factor, so that the user
621 // would know not to attempt to access sub-word array elements.
622 // // Code for unpacked fields:
623 // if (scale < wordSize) return 0;
624
625 // The following allows for a pretty general fieldOffset cookie scheme,
626 // but requires it to be linear in byte offset.
627 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
628 } UNSAFE_END
629
630
631 static inline void throw_new(JNIEnv *env, const char *ename) {
632 jclass cls = env->FindClass(ename);
633 if (env->ExceptionCheck()) {
634 env->ExceptionClear();
635 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename);
636 return;
637 }
638
639 env->ThrowNew(cls, nullptr);
640 }
641
642 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
643 // Code lifted from JDK 1.3 ClassLoader.c
644
645 jbyte *body;
646 char *utfName = nullptr;
647 jclass result = nullptr;
648 char buf[128];
649
823 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
824 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
825 case 1: a->double_at_put(0, (jdouble)la[0]); break;
826 }
827
828 return ret;
829 } UNSAFE_END
830
831
832 /// JVM_RegisterUnsafeMethods
833
834 #define ADR "J"
835
836 #define LANG "Ljava/lang/"
837
838 #define OBJ LANG "Object;"
839 #define CLS LANG "Class;"
840 #define FLD LANG "reflect/Field;"
841 #define THR LANG "Throwable;"
842
843 #define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;"
844 #define DAC_Args CLS "[B[" OBJ
845
846 #define CC (char*) /*cast a literal from (const char*)*/
847 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
848
849 #define DECLARE_GETPUTOOP(Type, Desc) \
850 {CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \
851 {CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \
852 {CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \
853 {CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)}
854
855
856 static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = {
857 {CC "getReference", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetReference)},
858 {CC "putReference", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReference)},
859 {CC "getReferenceVolatile", CC "(" OBJ "J)" OBJ, FN_PTR(Unsafe_GetReferenceVolatile)},
860 {CC "putReferenceVolatile", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReferenceVolatile)},
861
862 {CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)},
863
864 DECLARE_GETPUTOOP(Boolean, Z),
865 DECLARE_GETPUTOOP(Byte, B),
866 DECLARE_GETPUTOOP(Short, S),
867 DECLARE_GETPUTOOP(Char, C),
868 DECLARE_GETPUTOOP(Int, I),
869 DECLARE_GETPUTOOP(Long, J),
870 DECLARE_GETPUTOOP(Float, F),
871 DECLARE_GETPUTOOP(Double, D),
872
873 {CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)},
874 {CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)},
875 {CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)},
876
877 {CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)},
878 {CC "knownObjectFieldOffset0", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_KnownObjectFieldOffset0)},
879 {CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)},
880 {CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)},
881 {CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)},
882 {CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)},
883 {CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)},
884
885 {CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)},
886 {CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)},
887 {CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)},
888 {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
889 {CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)},
890 {CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)},
891 {CC "compareAndExchangeReference", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeReference)},
892 {CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)},
893 {CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)},
894
895 {CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)},
896 {CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)},
897
898 {CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)},
899
900 {CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)},
901 {CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)},
902 {CC "writeback0", CC "(" "J" ")V", FN_PTR(Unsafe_WriteBack0)},
903 {CC "writebackPreSync0", CC "()V", FN_PTR(Unsafe_WriteBackPreSync0)},
904 {CC "writebackPostSync0", CC "()V", FN_PTR(Unsafe_WriteBackPostSync0)},
905 {CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)},
906
907 {CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)},
908
909 {CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)},
910 };
911
912 #undef CC
913 #undef FN_PTR
914
915 #undef ADR
916 #undef LANG
917 #undef OBJ
918 #undef CLS
919 #undef FLD
920 #undef THR
921 #undef DC_Args
922 #undef DAC_Args
923
924 #undef DECLARE_GETPUTOOP
925
926
927 // This function is exported, used by NativeLookup.
|
1 /*
2 * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
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/classFileStream.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/classLoadInfo.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "jfr/jfrEvents.hpp"
32 #include "jni.h"
33 #include "jvm.h"
34 #include "logging/log.hpp"
35 #include "logging/logStream.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "memory/oopFactory.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "oops/access.inline.hpp"
40 #include "oops/fieldStreams.inline.hpp"
41 #include "oops/flatArrayKlass.hpp"
42 #include "oops/flatArrayOop.inline.hpp"
43 #include "oops/inlineKlass.inline.hpp"
44 #include "oops/instanceKlass.inline.hpp"
45 #include "oops/klass.inline.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/oopCast.inline.hpp"
49 #include "oops/typeArrayOop.inline.hpp"
50 #include "oops/valuePayload.hpp"
51 #include "prims/jvmtiExport.hpp"
52 #include "prims/unsafe.hpp"
53 #include "runtime/fieldDescriptor.inline.hpp"
54 #include "runtime/globals.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/interfaceSupport.inline.hpp"
57 #include "runtime/javaThread.inline.hpp"
58 #include "runtime/jniHandles.inline.hpp"
59 #include "runtime/orderAccess.hpp"
60 #include "runtime/reflection.hpp"
61 #include "runtime/sharedRuntime.hpp"
62 #include "runtime/stubRoutines.hpp"
63 #include "runtime/threadSMR.hpp"
64 #include "runtime/vm_version.hpp"
65 #include "runtime/vmOperations.hpp"
66 #include "sanitizers/ub.hpp"
67 #include "services/threadService.hpp"
68 #include "utilities/align.hpp"
69 #include "utilities/copy.hpp"
70 #include "utilities/dtrace.hpp"
71 #include "utilities/macros.hpp"
72
73 /**
206 jboolean normalize(jboolean x) {
207 return (x & 1) != 0;
208 }
209
210 public:
211 MemoryAccess(JavaThread* thread, jobject obj, jlong offset)
212 : _thread(thread), _obj(JNIHandles::resolve(obj)), _offset((ptrdiff_t)offset) {
213 assert_field_offset_sane(_obj, offset);
214 }
215
216 T get() {
217 GuardUnsafeAccess guard(_thread);
218 return normalize(*addr());
219 }
220
221 // we use this method at some places for writing to 0 e.g. to cause a crash;
222 // ubsan does not know that this is the desired behavior
223 ATTRIBUTE_NO_UBSAN
224 void put(T x) {
225 GuardUnsafeAccess guard(_thread);
226 assert(_obj == nullptr || !_obj->is_inline_type(), "receiver cannot be an instance of a value class because they are immutable");
227 *addr() = normalize(x);
228 }
229
230
231 T get_volatile() {
232 GuardUnsafeAccess guard(_thread);
233 volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
234 return normalize(ret);
235 }
236
237 void put_volatile(T x) {
238 GuardUnsafeAccess guard(_thread);
239 RawAccess<MO_SEQ_CST>::store(addr(), normalize(x));
240 }
241 };
242
243 static void log_unsafe_value_access(oop p, jlong offset, InlineKlass* vk) {
244 Klass* k = p->klass();
245 if (log_is_enabled(Trace, valuetypes)) {
246 ResourceMark rm;
247 if (k->is_flatArray_klass()) {
248 FlatArrayKlass* vak = FlatArrayKlass::cast(k);
249 int index = (offset - vak->array_header_in_bytes()) / vak->element_byte_size();
250 flatArrayOop array = oop_cast<flatArrayOop>(p);
251 if (index >= 0 && index < array->length()) {
252 address dest = (address)((flatArrayOop)p)->value_at_addr(index, vak->layout_helper());
253 log_trace(valuetypes)("%s array type %s index %d element size %d offset " UINT64_FORMAT_X " at " INTPTR_FORMAT,
254 p->klass()->external_name(), vak->external_name(),
255 index, vak->element_byte_size(), (uint64_t)offset, p2i(dest));
256 } else {
257 log_trace(valuetypes)("%s array type %s out-of-bounds index %d element size %d offset " UINT64_FORMAT_X,
258 p->klass()->external_name(), vak->external_name(), index, vak->element_byte_size(), (uint64_t)offset);
259 }
260 } else {
261 log_trace(valuetypes)("%s field type %s at offset " UINT64_FORMAT_X,
262 p->klass()->external_name(), vk->external_name(), (uint64_t)offset);
263 }
264 }
265 }
266
267 // These functions allow a null base pointer with an arbitrary address.
268 // But if the base pointer is non-null, the offset should make some sense.
269 // That is, it should be in the range [0, MAX_OBJECT_SIZE].
270 UNSAFE_ENTRY(jobject, Unsafe_GetReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
271 oop p = JNIHandles::resolve(obj);
272 assert_field_offset_sane(p, offset);
273 oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
274 return JNIHandles::make_local(THREAD, v);
275 } UNSAFE_END
276
277 UNSAFE_ENTRY(void, Unsafe_PutReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
278 oop x = JNIHandles::resolve(x_h);
279 oop p = JNIHandles::resolve(obj);
280 assert_field_offset_sane(p, offset);
281 assert(!p->is_inline_type(), "receiver cannot be an instance of a value class because they are immutable");
282 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
283 } UNSAFE_END
284
285 UNSAFE_ENTRY(jlong, Unsafe_ValueHeaderSize(JNIEnv *env, jobject unsafe, jclass c)) {
286 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(c));
287 InlineKlass* vk = InlineKlass::cast(k);
288 return vk->payload_offset();
289 } UNSAFE_END
290
291 UNSAFE_ENTRY(jboolean, Unsafe_IsFlatField(JNIEnv *env, jobject unsafe, jobject o)) {
292 oop f = JNIHandles::resolve_non_null(o);
293 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
294 int slot = java_lang_reflect_Field::slot(f);
295 return InstanceKlass::cast(k)->field_is_flat(slot);
296 } UNSAFE_END
297
298 UNSAFE_ENTRY(jboolean, Unsafe_HasNullMarker(JNIEnv *env, jobject unsafe, jobject o)) {
299 oop f = JNIHandles::resolve_non_null(o);
300 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
301 int slot = java_lang_reflect_Field::slot(f);
302 return InstanceKlass::cast(k)->field_has_null_marker(slot);
303 } UNSAFE_END
304
305 UNSAFE_ENTRY(jint, Unsafe_NullMarkerOffset(JNIEnv *env, jobject unsafe, jobject o)) {
306 oop f = JNIHandles::resolve_non_null(o);
307 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
308 int slot = java_lang_reflect_Field::slot(f);
309 return InstanceKlass::cast(k)->field_null_marker_offset(slot);
310 } UNSAFE_END
311
312 UNSAFE_ENTRY(jint, Unsafe_ArrayLayout(JNIEnv *env, jobject unsafe, jarray array)) {
313 oop ar = JNIHandles::resolve_non_null(array);
314 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
315 if (ak->is_refArray_klass()) {
316 return (jint)LayoutKind::REFERENCE;
317 } else if (ak->is_flatArray_klass()) {
318 return (jint)FlatArrayKlass::cast(ak)->layout_kind();
319 } else {
320 ShouldNotReachHere();
321 return -1;
322 }
323 } UNSAFE_END
324
325 UNSAFE_ENTRY(jint, Unsafe_FieldLayout(JNIEnv *env, jobject unsafe, jobject field)) {
326 assert(field != nullptr, "field must not be null");
327
328 oop reflected = JNIHandles::resolve_non_null(field);
329 oop mirror = java_lang_reflect_Field::clazz(reflected);
330 Klass* k = java_lang_Class::as_Klass(mirror);
331 int slot = java_lang_reflect_Field::slot(reflected);
332 int modifiers = java_lang_reflect_Field::modifiers(reflected);
333
334 if ((modifiers & JVM_ACC_STATIC) != 0) {
335 return (jint)LayoutKind::REFERENCE; // static fields are never flat
336 } else {
337 InstanceKlass* ik = InstanceKlass::cast(k);
338 if (ik->field_is_flat(slot)) {
339 return (jint)ik->inline_layout_info(slot).kind();
340 } else {
341 return (jint)LayoutKind::REFERENCE;
342 }
343 }
344 } UNSAFE_END
345
346 UNSAFE_ENTRY(jarray, Unsafe_NewSpecialArray(JNIEnv *env, jobject unsafe, jclass elmClass, jint len, jint layoutKind)) {
347 oop mirror = JNIHandles::resolve_non_null(elmClass);
348 Klass* klass = java_lang_Class::as_Klass(mirror);
349 klass->initialize(CHECK_NULL);
350 if (len < 0) {
351 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Array length is negative");
352 }
353 if (klass->is_array_klass() || klass->is_identity_class()) {
354 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Element class is not a value class");
355 }
356 if (klass->is_abstract()) {
357 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Element class is abstract");
358 }
359 LayoutKind lk = static_cast<LayoutKind>(layoutKind);
360 if (lk <= LayoutKind::REFERENCE || lk == LayoutKind::NULLABLE_NON_ATOMIC_FLAT || lk >= LayoutKind::UNKNOWN) {
361 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Invalid layout kind");
362 }
363 InlineKlass* vk = InlineKlass::cast(klass);
364 // WARNING: test below will need modifications when flat layouts supported for fields
365 // but not for arrays are introduce (NULLABLE_NON_ATOMIC_FLAT for instance)
366 if (!UseArrayFlattening || !vk->is_layout_supported(lk)) {
367 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "Layout not supported");
368 }
369 ArrayProperties props = ArrayKlass::array_properties_from_layout(lk);
370 oop array = oopFactory::new_flatArray(vk, len, props, CHECK_NULL);
371 return (jarray) JNIHandles::make_local(THREAD, array);
372 } UNSAFE_END
373
374 UNSAFE_ENTRY(jobject, Unsafe_GetFlatValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint layoutKind, jclass vc)) {
375 assert(layoutKind != (int)LayoutKind::UNKNOWN, "Sanity");
376 assert(layoutKind != (int)LayoutKind::REFERENCE, "This method handles only flat layouts");
377 oop base = JNIHandles::resolve(obj);
378 if (base == nullptr) {
379 THROW_NULL(vmSymbols::java_lang_NullPointerException());
380 }
381 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
382 InlineKlass* vk = InlineKlass::cast(k);
383 log_unsafe_value_access(base, offset, vk);
384 LayoutKind lk = (LayoutKind)layoutKind;
385 FlatValuePayload payload = FlatValuePayload::construct_from_parts(base, offset, vk, lk);
386 oop v = payload.read(CHECK_NULL);
387 return JNIHandles::make_local(THREAD, v);
388 } UNSAFE_END
389
390 UNSAFE_ENTRY(void, Unsafe_PutFlatValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint layoutKind, jclass vc, jobject value)) {
391 assert(layoutKind != (int)LayoutKind::UNKNOWN, "Sanity");
392 assert(layoutKind != (int)LayoutKind::REFERENCE, "This method handles only flat layouts");
393 oop base = JNIHandles::resolve(obj);
394 if (base == nullptr) {
395 THROW(vmSymbols::java_lang_NullPointerException());
396 }
397
398 InlineKlass* vk = InlineKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc)));
399 log_unsafe_value_access(base, offset, vk);
400 LayoutKind lk = (LayoutKind)layoutKind;
401 FlatValuePayload payload = FlatValuePayload::construct_from_parts(base, offset, vk, lk);
402 payload.write(inlineOop(JNIHandles::resolve(value)), CHECK);
403 } UNSAFE_END
404
405 UNSAFE_ENTRY(jobject, Unsafe_GetReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
406 oop p = JNIHandles::resolve(obj);
407 assert_field_offset_sane(p, offset);
408 oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
409 return JNIHandles::make_local(THREAD, v);
410 } UNSAFE_END
411
412 UNSAFE_ENTRY(void, Unsafe_PutReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
413 oop x = JNIHandles::resolve(x_h);
414 oop p = JNIHandles::resolve(obj);
415 assert_field_offset_sane(p, offset);
416 HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
417 } UNSAFE_END
418
419 UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
420 oop v = *(oop*) (address) addr;
421 return JNIHandles::make_local(THREAD, v);
422 } UNSAFE_END
423
424 #define DEFINE_GETSETOOP(java_type, Type) \
715 InstanceKlass* k = InstanceKlass::cast(klass);
716 k->initialize(CHECK);
717 }
718 }
719 UNSAFE_END
720
721 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) {
722 assert(clazz != nullptr, "clazz must not be null");
723
724 oop mirror = JNIHandles::resolve_non_null(clazz);
725 Klass* klass = java_lang_Class::as_Klass(mirror);
726
727 if (klass != nullptr && klass->should_be_initialized()) {
728 return true;
729 }
730
731 return false;
732 }
733 UNSAFE_END
734
735 UNSAFE_ENTRY(void, Unsafe_NotifyStrictStaticAccess0(JNIEnv *env, jobject unsafe, jobject clazz,
736 jlong sfoffset, jboolean writing)) {
737 assert(clazz != nullptr, "clazz must not be null");
738
739 oop mirror = JNIHandles::resolve_non_null(clazz);
740 Klass* klass = java_lang_Class::as_Klass(mirror);
741
742 if (klass != nullptr && klass->is_instance_klass()) {
743 InstanceKlass* ik = InstanceKlass::cast(klass);
744 fieldDescriptor fd;
745 if (ik->find_local_field_from_offset((int)sfoffset, true, &fd)) {
746 // Note: The Unsafe API takes an OFFSET, but the InstanceKlass wants the INDEX.
747 // We could surface field indexes into Unsafe, but that's too much churn.
748 ik->notify_strict_static_access(fd.index(), writing, CHECK);
749 return;
750 }
751 }
752 THROW(vmSymbols::java_lang_InternalError());
753 }
754 UNSAFE_END
755
756 static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) {
757 assert(clazz != nullptr, "clazz must not be null");
758
759 oop mirror = JNIHandles::resolve_non_null(clazz);
760 Klass* k = java_lang_Class::as_Klass(mirror);
761
762 if (k == nullptr || !k->is_array_klass()) {
763 THROW(vmSymbols::java_lang_InvalidClassException());
764 } else if (k->is_typeArray_klass()) {
765 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
766 base = tak->array_header_in_bytes();
767 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
768 scale = (1 << tak->log2_element_size());
769 } else if (k->is_objArray_klass()) {
770 Klass* ek = ObjArrayKlass::cast(k)->element_klass();
771 if (!ek->is_identity_class() && !ek->is_abstract()) {
772 // Arrays of a concrete value class type can have multiple layouts
773 // There's no good value to return, so throwing an exception is the way out
774 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Arrays of a concrete value class don't have a single base and offset");
775 }
776 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
777 scale = heapOopSize;
778 } else {
779 ShouldNotReachHere();
780 }
781 }
782
783 UNSAFE_ENTRY(jint, Unsafe_ArrayInstanceBaseOffset0(JNIEnv *env, jobject unsafe, jarray array)) {
784 assert(array != nullptr, "array must not be null");
785 oop ar = JNIHandles::resolve_non_null(array);
786 assert(ar->is_array(), "Must be an array");
787 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
788 if (ak->is_refArray_klass()) {
789 return arrayOopDesc::base_offset_in_bytes(T_OBJECT);
790 } else if (ak->is_flatArray_klass()) {
791 FlatArrayKlass* fak = FlatArrayKlass::cast(ak);
792 return fak->array_header_in_bytes();
793 } else {
794 ShouldNotReachHere();
795 }
796 } UNSAFE_END
797
798 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) {
799 int base = 0, scale = 0;
800 getBaseAndScale(base, scale, clazz, CHECK_0);
801
802 return field_offset_from_byte_offset(base);
803 } UNSAFE_END
804
805
806 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) {
807 int base = 0, scale = 0;
808 getBaseAndScale(base, scale, clazz, CHECK_0);
809
810 // This VM packs both fields and array elements down to the byte.
811 // But watch out: If this changes, so that array references for
812 // a given primitive type (say, T_BOOLEAN) use different memory units
813 // than fields, this method MUST return zero for such arrays.
814 // For example, the VM used to store sub-word sized fields in full
815 // words in the object layout, so that accessors like getByte(Object,int)
816 // did not really do what one might expect for arrays. Therefore,
817 // this function used to report a zero scale factor, so that the user
818 // would know not to attempt to access sub-word array elements.
819 // // Code for unpacked fields:
820 // if (scale < wordSize) return 0;
821
822 // The following allows for a pretty general fieldOffset cookie scheme,
823 // but requires it to be linear in byte offset.
824 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
825 } UNSAFE_END
826
827 UNSAFE_ENTRY(jint, Unsafe_ArrayInstanceIndexScale0(JNIEnv *env, jobject unsafe, jarray array)) {
828 assert(array != nullptr, "array must not be null");
829 oop ar = JNIHandles::resolve_non_null(array);
830 assert(ar->is_array(), "Must be an array");
831 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
832 if (ak->is_refArray_klass()) {
833 return heapOopSize;
834 } else if (ak->is_flatArray_klass()) {
835 FlatArrayKlass* fak = FlatArrayKlass::cast(ak);
836 return fak->element_byte_size();
837 } else {
838 ShouldNotReachHere();
839 }
840 } UNSAFE_END
841
842 UNSAFE_ENTRY(jarray, Unsafe_GetFieldMap0(JNIEnv* env, jobject unsafe, jclass clazz)) {
843 oop mirror = JNIHandles::resolve_non_null(clazz);
844 Klass* k = java_lang_Class::as_Klass(mirror);
845
846 if (!k->is_inline_klass()) {
847 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not a concrete value class");
848 }
849 InlineKlass* vk = InlineKlass::cast(k);
850 oop map = mirror->obj_field(vk->acmp_maps_offset());
851 return (jarray) JNIHandles::make_local(THREAD, map);
852 } UNSAFE_END
853
854 UNSAFE_ENTRY(jlong, Unsafe_GetObjectSize0(JNIEnv* env, jobject o, jobject obj))
855 oop p = JNIHandles::resolve(obj);
856 return p->size() * HeapWordSize;
857 UNSAFE_END
858
859 static inline void throw_new(JNIEnv *env, const char *ename) {
860 jclass cls = env->FindClass(ename);
861 if (env->ExceptionCheck()) {
862 env->ExceptionClear();
863 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename);
864 return;
865 }
866
867 env->ThrowNew(cls, nullptr);
868 }
869
870 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
871 // Code lifted from JDK 1.3 ClassLoader.c
872
873 jbyte *body;
874 char *utfName = nullptr;
875 jclass result = nullptr;
876 char buf[128];
877
1051 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
1052 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
1053 case 1: a->double_at_put(0, (jdouble)la[0]); break;
1054 }
1055
1056 return ret;
1057 } UNSAFE_END
1058
1059
1060 /// JVM_RegisterUnsafeMethods
1061
1062 #define ADR "J"
1063
1064 #define LANG "Ljava/lang/"
1065
1066 #define OBJ LANG "Object;"
1067 #define CLS LANG "Class;"
1068 #define FLD LANG "reflect/Field;"
1069 #define THR LANG "Throwable;"
1070
1071 #define OBJ_ARR "[" OBJ
1072
1073 #define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;"
1074 #define DAC_Args CLS "[B[" OBJ
1075
1076 #define CC (char*) /*cast a literal from (const char*)*/
1077 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
1078
1079 #define DECLARE_GETPUTOOP(Type, Desc) \
1080 {CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \
1081 {CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \
1082 {CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \
1083 {CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)}
1084
1085
1086 static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = {
1087 {CC "getReference", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetReference)},
1088 {CC "putReference", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReference)},
1089 {CC "getReferenceVolatile", CC "(" OBJ "J)" OBJ, FN_PTR(Unsafe_GetReferenceVolatile)},
1090 {CC "putReferenceVolatile", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReferenceVolatile)},
1091
1092 {CC "isFlatField0", CC "(" OBJ ")Z", FN_PTR(Unsafe_IsFlatField)},
1093 {CC "hasNullMarker0", CC "(" OBJ ")Z", FN_PTR(Unsafe_HasNullMarker)},
1094 {CC "nullMarkerOffset0", CC "(" OBJ ")I", FN_PTR(Unsafe_NullMarkerOffset)},
1095 {CC "arrayLayout0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayLayout)},
1096 {CC "fieldLayout0", CC "(" OBJ ")I", FN_PTR(Unsafe_FieldLayout)},
1097 {CC "newSpecialArray", CC "(" CLS "II)[" OBJ, FN_PTR(Unsafe_NewSpecialArray)},
1098 {CC "getFlatValue", CC "(" OBJ "JI" CLS ")" OBJ, FN_PTR(Unsafe_GetFlatValue)},
1099 {CC "putFlatValue", CC "(" OBJ "JI" CLS OBJ ")V", FN_PTR(Unsafe_PutFlatValue)},
1100 {CC "valueHeaderSize", CC "(" CLS ")J", FN_PTR(Unsafe_ValueHeaderSize)},
1101 {CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)},
1102
1103 DECLARE_GETPUTOOP(Boolean, Z),
1104 DECLARE_GETPUTOOP(Byte, B),
1105 DECLARE_GETPUTOOP(Short, S),
1106 DECLARE_GETPUTOOP(Char, C),
1107 DECLARE_GETPUTOOP(Int, I),
1108 DECLARE_GETPUTOOP(Long, J),
1109 DECLARE_GETPUTOOP(Float, F),
1110 DECLARE_GETPUTOOP(Double, D),
1111
1112 {CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)},
1113 {CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)},
1114 {CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)},
1115
1116 {CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)},
1117 {CC "knownObjectFieldOffset0", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_KnownObjectFieldOffset0)},
1118 {CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)},
1119 {CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)},
1120 {CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)},
1121 {CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)},
1122 {CC "arrayInstanceBaseOffset0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayInstanceBaseOffset0)},
1123 {CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)},
1124 {CC "arrayInstanceIndexScale0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayInstanceIndexScale0)},
1125 {CC "getFieldMap0", CC "(Ljava/lang/Class;)[I", FN_PTR(Unsafe_GetFieldMap0)},
1126 {CC "getObjectSize0", CC "(Ljava/lang/Object;)J", FN_PTR(Unsafe_GetObjectSize0)},
1127
1128 {CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)},
1129 {CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)},
1130 {CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)},
1131 {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
1132 {CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)},
1133 {CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)},
1134 {CC "compareAndExchangeReference", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeReference)},
1135 {CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)},
1136 {CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)},
1137
1138 {CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)},
1139 {CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)},
1140
1141 {CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)},
1142
1143 {CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)},
1144 {CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)},
1145 {CC "writeback0", CC "(" "J" ")V", FN_PTR(Unsafe_WriteBack0)},
1146 {CC "writebackPreSync0", CC "()V", FN_PTR(Unsafe_WriteBackPreSync0)},
1147 {CC "writebackPostSync0", CC "()V", FN_PTR(Unsafe_WriteBackPostSync0)},
1148 {CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)},
1149
1150 {CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)},
1151 {CC "notifyStrictStaticAccess0", CC "(" CLS "JZ)V", FN_PTR(Unsafe_NotifyStrictStaticAccess0)},
1152
1153 {CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)},
1154 };
1155
1156 #undef CC
1157 #undef FN_PTR
1158
1159 #undef ADR
1160 #undef LANG
1161 #undef OBJ
1162 #undef CLS
1163 #undef FLD
1164 #undef THR
1165 #undef DC_Args
1166 #undef DAC_Args
1167
1168 #undef DECLARE_GETPUTOOP
1169
1170
1171 // This function is exported, used by NativeLookup.
|