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 /**
206 jboolean normalize_for_read(jboolean x) {
207 return x != 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_for_read(*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 *addr() = normalize_for_write(x);
227 }
228
229
230 T get_volatile() {
231 GuardUnsafeAccess guard(_thread);
232 volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
233 return normalize_for_read(ret);
234 }
235
236 void put_volatile(T x) {
237 GuardUnsafeAccess guard(_thread);
238 RawAccess<MO_SEQ_CST>::store(addr(), normalize_for_write(x));
239 }
240 };
241
242 // These functions allow a null base pointer with an arbitrary address.
243 // But if the base pointer is non-null, the offset should make some sense.
244 // That is, it should be in the range [0, MAX_OBJECT_SIZE].
245 UNSAFE_ENTRY(jobject, Unsafe_GetReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
246 oop p = JNIHandles::resolve(obj);
247 assert_field_offset_sane(p, offset);
248 oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
249 return JNIHandles::make_local(THREAD, v);
250 } UNSAFE_END
251
252 UNSAFE_ENTRY(void, Unsafe_PutReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
253 oop x = JNIHandles::resolve(x_h);
254 oop p = JNIHandles::resolve(obj);
255 assert_field_offset_sane(p, offset);
256 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
257 } UNSAFE_END
258
259 UNSAFE_ENTRY(jobject, Unsafe_GetReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
260 oop p = JNIHandles::resolve(obj);
261 assert_field_offset_sane(p, offset);
262 oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
263 return JNIHandles::make_local(THREAD, v);
264 } UNSAFE_END
265
266 UNSAFE_ENTRY(void, Unsafe_PutReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
267 oop x = JNIHandles::resolve(x_h);
268 oop p = JNIHandles::resolve(obj);
269 assert_field_offset_sane(p, offset);
270 HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
271 } UNSAFE_END
272
273 UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
274 oop v = *(oop*) (address) addr;
275 return JNIHandles::make_local(THREAD, v);
276 } UNSAFE_END
277
278 #define DEFINE_GETSETOOP(java_type, Type) \
569 InstanceKlass* k = InstanceKlass::cast(klass);
570 k->initialize(CHECK);
571 }
572 }
573 UNSAFE_END
574
575 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) {
576 assert(clazz != nullptr, "clazz must not be null");
577
578 oop mirror = JNIHandles::resolve_non_null(clazz);
579 Klass* klass = java_lang_Class::as_Klass(mirror);
580
581 if (klass != nullptr && klass->should_be_initialized()) {
582 return true;
583 }
584
585 return false;
586 }
587 UNSAFE_END
588
589 static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) {
590 assert(clazz != nullptr, "clazz must not be null");
591
592 oop mirror = JNIHandles::resolve_non_null(clazz);
593 Klass* k = java_lang_Class::as_Klass(mirror);
594
595 if (k == nullptr || !k->is_array_klass()) {
596 THROW(vmSymbols::java_lang_InvalidClassException());
597 } else if (k->is_objArray_klass()) {
598 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
599 scale = heapOopSize;
600 } else if (k->is_typeArray_klass()) {
601 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
602 base = tak->array_header_in_bytes();
603 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
604 scale = (1 << tak->log2_element_size());
605 } else {
606 ShouldNotReachHere();
607 }
608 }
609
610 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) {
611 int base = 0, scale = 0;
612 getBaseAndScale(base, scale, clazz, CHECK_0);
613
614 return field_offset_from_byte_offset(base);
615 } UNSAFE_END
616
617
618 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) {
619 int base = 0, scale = 0;
620 getBaseAndScale(base, scale, clazz, CHECK_0);
621
622 // This VM packs both fields and array elements down to the byte.
623 // But watch out: If this changes, so that array references for
624 // a given primitive type (say, T_BOOLEAN) use different memory units
625 // than fields, this method MUST return zero for such arrays.
626 // For example, the VM used to store sub-word sized fields in full
627 // words in the object layout, so that accessors like getByte(Object,int)
628 // did not really do what one might expect for arrays. Therefore,
629 // this function used to report a zero scale factor, so that the user
630 // would know not to attempt to access sub-word array elements.
631 // // Code for unpacked fields:
632 // if (scale < wordSize) return 0;
633
634 // The following allows for a pretty general fieldOffset cookie scheme,
635 // but requires it to be linear in byte offset.
636 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
637 } UNSAFE_END
638
639
640 static inline void throw_new(JNIEnv *env, const char *ename) {
641 jclass cls = env->FindClass(ename);
642 if (env->ExceptionCheck()) {
643 env->ExceptionClear();
644 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename);
645 return;
646 }
647
648 env->ThrowNew(cls, nullptr);
649 }
650
651 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
652 // Code lifted from JDK 1.3 ClassLoader.c
653
654 jbyte *body;
655 char *utfName = nullptr;
656 jclass result = nullptr;
657 char buf[128];
658
832 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
833 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
834 case 1: a->double_at_put(0, (jdouble)la[0]); break;
835 }
836
837 return ret;
838 } UNSAFE_END
839
840
841 /// JVM_RegisterUnsafeMethods
842
843 #define ADR "J"
844
845 #define LANG "Ljava/lang/"
846
847 #define OBJ LANG "Object;"
848 #define CLS LANG "Class;"
849 #define FLD LANG "reflect/Field;"
850 #define THR LANG "Throwable;"
851
852 #define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;"
853 #define DAC_Args CLS "[B[" OBJ
854
855 #define CC (char*) /*cast a literal from (const char*)*/
856 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
857
858 #define DECLARE_GETPUTOOP(Type, Desc) \
859 {CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \
860 {CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \
861 {CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \
862 {CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)}
863
864
865 static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = {
866 {CC "getReference", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetReference)},
867 {CC "putReference", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReference)},
868 {CC "getReferenceVolatile", CC "(" OBJ "J)" OBJ, FN_PTR(Unsafe_GetReferenceVolatile)},
869 {CC "putReferenceVolatile", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReferenceVolatile)},
870
871 {CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)},
872
873 DECLARE_GETPUTOOP(Boolean, Z),
874 DECLARE_GETPUTOOP(Byte, B),
875 DECLARE_GETPUTOOP(Short, S),
876 DECLARE_GETPUTOOP(Char, C),
877 DECLARE_GETPUTOOP(Int, I),
878 DECLARE_GETPUTOOP(Long, J),
879 DECLARE_GETPUTOOP(Float, F),
880 DECLARE_GETPUTOOP(Double, D),
881
882 {CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)},
883 {CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)},
884 {CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)},
885
886 {CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)},
887 {CC "knownObjectFieldOffset0", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_KnownObjectFieldOffset0)},
888 {CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)},
889 {CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)},
890 {CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)},
891 {CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)},
892 {CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)},
893
894 {CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)},
895 {CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)},
896 {CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)},
897 {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
898 {CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)},
899 {CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)},
900 {CC "compareAndExchangeReference", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeReference)},
901 {CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)},
902 {CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)},
903
904 {CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)},
905 {CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)},
906
907 {CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)},
908
909 {CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)},
910 {CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)},
911 {CC "writeback0", CC "(" "J" ")V", FN_PTR(Unsafe_WriteBack0)},
912 {CC "writebackPreSync0", CC "()V", FN_PTR(Unsafe_WriteBackPreSync0)},
913 {CC "writebackPostSync0", CC "()V", FN_PTR(Unsafe_WriteBackPostSync0)},
914 {CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)},
915
916 {CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)},
917
918 {CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)},
919 };
920
921 #undef CC
922 #undef FN_PTR
923
924 #undef ADR
925 #undef LANG
926 #undef OBJ
927 #undef CLS
928 #undef FLD
929 #undef THR
930 #undef DC_Args
931 #undef DAC_Args
932
933 #undef DECLARE_GETPUTOOP
934
935
936 // 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 /**
215 jboolean normalize_for_read(jboolean x) {
216 return x != 0;
217 }
218
219 public:
220 MemoryAccess(JavaThread* thread, jobject obj, jlong offset)
221 : _thread(thread), _obj(JNIHandles::resolve(obj)), _offset((ptrdiff_t)offset) {
222 assert_field_offset_sane(_obj, offset);
223 }
224
225 T get() {
226 GuardUnsafeAccess guard(_thread);
227 return normalize_for_read(*addr());
228 }
229
230 // we use this method at some places for writing to 0 e.g. to cause a crash;
231 // ubsan does not know that this is the desired behavior
232 ATTRIBUTE_NO_UBSAN
233 void put(T x) {
234 GuardUnsafeAccess guard(_thread);
235 assert(_obj == nullptr || !_obj->is_inline_type(), "receiver cannot be an instance of a value class because they are immutable");
236 *addr() = normalize_for_write(x);
237 }
238
239
240 T get_volatile() {
241 GuardUnsafeAccess guard(_thread);
242 volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
243 return normalize_for_read(ret);
244 }
245
246 void put_volatile(T x) {
247 GuardUnsafeAccess guard(_thread);
248 RawAccess<MO_SEQ_CST>::store(addr(), normalize_for_write(x));
249 }
250 };
251
252 static void log_unsafe_value_access(oop p, jlong offset, InlineKlass* vk) {
253 Klass* k = p->klass();
254 if (log_is_enabled(Trace, valuetypes)) {
255 ResourceMark rm;
256 if (k->is_flatArray_klass()) {
257 FlatArrayKlass* vak = FlatArrayKlass::cast(k);
258 int index = (offset - vak->array_header_in_bytes()) / vak->element_byte_size();
259 flatArrayOop array = oop_cast<flatArrayOop>(p);
260 if (index >= 0 && index < array->length()) {
261 address dest = (address)((flatArrayOop)p)->value_at_addr(index, vak->layout_helper());
262 log_trace(valuetypes)("%s array type %s index %d element size %d offset " UINT64_FORMAT_X " at " INTPTR_FORMAT,
263 p->klass()->external_name(), vak->external_name(),
264 index, vak->element_byte_size(), (uint64_t)offset, p2i(dest));
265 } else {
266 log_trace(valuetypes)("%s array type %s out-of-bounds index %d element size %d offset " UINT64_FORMAT_X,
267 p->klass()->external_name(), vak->external_name(), index, vak->element_byte_size(), (uint64_t)offset);
268 }
269 } else {
270 log_trace(valuetypes)("%s field type %s at offset " UINT64_FORMAT_X,
271 p->klass()->external_name(), vk->external_name(), (uint64_t)offset);
272 }
273 }
274 }
275
276 // These functions allow a null base pointer with an arbitrary address.
277 // But if the base pointer is non-null, the offset should make some sense.
278 // That is, it should be in the range [0, MAX_OBJECT_SIZE].
279 UNSAFE_ENTRY(jobject, Unsafe_GetReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
280 oop p = JNIHandles::resolve(obj);
281 assert_field_offset_sane(p, offset);
282 oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
283 return JNIHandles::make_local(THREAD, v);
284 } UNSAFE_END
285
286 UNSAFE_ENTRY(void, Unsafe_PutReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
287 oop x = JNIHandles::resolve(x_h);
288 oop p = JNIHandles::resolve(obj);
289 assert_field_offset_sane(p, offset);
290 assert(!p->is_inline_type(), "receiver cannot be an instance of a value class because they are immutable");
291 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
292 } UNSAFE_END
293
294 UNSAFE_ENTRY(jlong, Unsafe_ValueHeaderSize(JNIEnv *env, jobject unsafe, jclass c)) {
295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(c));
296 InlineKlass* vk = InlineKlass::cast(k);
297 return vk->payload_offset();
298 } UNSAFE_END
299
300 UNSAFE_ENTRY(jboolean, Unsafe_IsFlatField(JNIEnv *env, jobject unsafe, jobject o)) {
301 oop f = JNIHandles::resolve_non_null(o);
302 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
303 int slot = java_lang_reflect_Field::slot(f);
304 return InstanceKlass::cast(k)->field_is_flat(slot);
305 } UNSAFE_END
306
307 UNSAFE_ENTRY(jboolean, Unsafe_HasNullMarker(JNIEnv *env, jobject unsafe, jobject o)) {
308 oop f = JNIHandles::resolve_non_null(o);
309 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
310 int slot = java_lang_reflect_Field::slot(f);
311 return InstanceKlass::cast(k)->field_has_null_marker(slot);
312 } UNSAFE_END
313
314 UNSAFE_ENTRY(jint, Unsafe_NullMarkerOffset(JNIEnv *env, jobject unsafe, jobject o)) {
315 oop f = JNIHandles::resolve_non_null(o);
316 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
317 int slot = java_lang_reflect_Field::slot(f);
318 return InstanceKlass::cast(k)->field_null_marker_offset(slot);
319 } UNSAFE_END
320
321 UNSAFE_ENTRY(jint, Unsafe_ArrayLayout(JNIEnv *env, jobject unsafe, jarray array)) {
322 oop ar = JNIHandles::resolve_non_null(array);
323 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
324 if (ak->is_refArray_klass()) {
325 return (jint)LayoutKind::REFERENCE;
326 } else if (ak->is_flatArray_klass()) {
327 return (jint)FlatArrayKlass::cast(ak)->layout_kind();
328 } else {
329 ShouldNotReachHere();
330 return -1;
331 }
332 } UNSAFE_END
333
334 UNSAFE_ENTRY(jint, Unsafe_FieldLayout(JNIEnv *env, jobject unsafe, jobject field)) {
335 assert(field != nullptr, "field must not be null");
336
337 oop reflected = JNIHandles::resolve_non_null(field);
338 oop mirror = java_lang_reflect_Field::clazz(reflected);
339 Klass* k = java_lang_Class::as_Klass(mirror);
340 int slot = java_lang_reflect_Field::slot(reflected);
341 int modifiers = java_lang_reflect_Field::modifiers(reflected);
342
343 if ((modifiers & JVM_ACC_STATIC) != 0) {
344 return (jint)LayoutKind::REFERENCE; // static fields are never flat
345 } else {
346 InstanceKlass* ik = InstanceKlass::cast(k);
347 if (ik->field_is_flat(slot)) {
348 return (jint)ik->inline_layout_info(slot).kind();
349 } else {
350 return (jint)LayoutKind::REFERENCE;
351 }
352 }
353 } UNSAFE_END
354
355 UNSAFE_ENTRY(jarray, Unsafe_NewSpecialArray(JNIEnv *env, jobject unsafe, jclass elmClass, jint len, jint layoutKind)) {
356 oop mirror = JNIHandles::resolve_non_null(elmClass);
357 Klass* klass = java_lang_Class::as_Klass(mirror);
358 klass->initialize(CHECK_NULL);
359 if (len < 0) {
360 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Array length is negative");
361 }
362 if (klass->is_array_klass() || klass->is_identity_class()) {
363 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Element class is not a value class");
364 }
365 if (klass->is_abstract()) {
366 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Element class is abstract");
367 }
368 LayoutKind lk = static_cast<LayoutKind>(layoutKind);
369 if (lk <= LayoutKind::REFERENCE || lk == LayoutKind::NULLABLE_NON_ATOMIC_FLAT || lk >= LayoutKind::UNKNOWN) {
370 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Invalid layout kind");
371 }
372 InlineKlass* vk = InlineKlass::cast(klass);
373 // WARNING: test below will need modifications when flat layouts supported for fields
374 // but not for arrays are introduce (NULLABLE_NON_ATOMIC_FLAT for instance)
375 if (!UseArrayFlattening || !vk->is_layout_supported(lk)) {
376 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "Layout not supported");
377 }
378 ArrayProperties props = ArrayKlass::array_properties_from_layout(lk);
379 oop array = oopFactory::new_flatArray(vk, len, props, CHECK_NULL);
380 return (jarray) JNIHandles::make_local(THREAD, array);
381 } UNSAFE_END
382
383 UNSAFE_ENTRY(jobject, Unsafe_GetFlatValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint layoutKind, jclass vc)) {
384 assert(layoutKind != (int)LayoutKind::UNKNOWN, "Sanity");
385 assert(layoutKind != (int)LayoutKind::REFERENCE, "This method handles only flat layouts");
386 oop base = JNIHandles::resolve(obj);
387 if (base == nullptr) {
388 THROW_NULL(vmSymbols::java_lang_NullPointerException());
389 }
390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
391 InlineKlass* vk = InlineKlass::cast(k);
392 log_unsafe_value_access(base, offset, vk);
393 LayoutKind lk = (LayoutKind)layoutKind;
394 FlatValuePayload payload = FlatValuePayload::construct_from_parts(base, offset, vk, lk);
395 oop v = payload.read(CHECK_NULL);
396 return JNIHandles::make_local(THREAD, v);
397 } UNSAFE_END
398
399 UNSAFE_ENTRY(void, Unsafe_PutFlatValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint layoutKind, jclass vc, jobject value)) {
400 assert(layoutKind != (int)LayoutKind::UNKNOWN, "Sanity");
401 assert(layoutKind != (int)LayoutKind::REFERENCE, "This method handles only flat layouts");
402 oop base = JNIHandles::resolve(obj);
403 if (base == nullptr) {
404 THROW(vmSymbols::java_lang_NullPointerException());
405 }
406
407 InlineKlass* vk = InlineKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc)));
408 log_unsafe_value_access(base, offset, vk);
409 LayoutKind lk = (LayoutKind)layoutKind;
410 FlatValuePayload payload = FlatValuePayload::construct_from_parts(base, offset, vk, lk);
411 payload.write(inlineOop(JNIHandles::resolve(value)), CHECK);
412 } UNSAFE_END
413
414 UNSAFE_ENTRY(jobject, Unsafe_GetReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
415 oop p = JNIHandles::resolve(obj);
416 assert_field_offset_sane(p, offset);
417 oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
418 return JNIHandles::make_local(THREAD, v);
419 } UNSAFE_END
420
421 UNSAFE_ENTRY(void, Unsafe_PutReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
422 oop x = JNIHandles::resolve(x_h);
423 oop p = JNIHandles::resolve(obj);
424 assert_field_offset_sane(p, offset);
425 HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
426 } UNSAFE_END
427
428 UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
429 oop v = *(oop*) (address) addr;
430 return JNIHandles::make_local(THREAD, v);
431 } UNSAFE_END
432
433 #define DEFINE_GETSETOOP(java_type, Type) \
724 InstanceKlass* k = InstanceKlass::cast(klass);
725 k->initialize(CHECK);
726 }
727 }
728 UNSAFE_END
729
730 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) {
731 assert(clazz != nullptr, "clazz must not be null");
732
733 oop mirror = JNIHandles::resolve_non_null(clazz);
734 Klass* klass = java_lang_Class::as_Klass(mirror);
735
736 if (klass != nullptr && klass->should_be_initialized()) {
737 return true;
738 }
739
740 return false;
741 }
742 UNSAFE_END
743
744 UNSAFE_ENTRY(void, Unsafe_NotifyStrictStaticAccess0(JNIEnv *env, jobject unsafe, jobject clazz,
745 jlong sfoffset, jboolean writing)) {
746 assert(clazz != nullptr, "clazz must not be null");
747
748 oop mirror = JNIHandles::resolve_non_null(clazz);
749 Klass* klass = java_lang_Class::as_Klass(mirror);
750
751 if (klass != nullptr && klass->is_instance_klass()) {
752 InstanceKlass* ik = InstanceKlass::cast(klass);
753 fieldDescriptor fd;
754 if (ik->find_local_field_from_offset((int)sfoffset, true, &fd)) {
755 // Note: The Unsafe API takes an OFFSET, but the InstanceKlass wants the INDEX.
756 // We could surface field indexes into Unsafe, but that's too much churn.
757 ik->notify_strict_static_access(fd.index(), writing, CHECK);
758 return;
759 }
760 }
761 THROW(vmSymbols::java_lang_InternalError());
762 }
763 UNSAFE_END
764
765 static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) {
766 assert(clazz != nullptr, "clazz must not be null");
767
768 oop mirror = JNIHandles::resolve_non_null(clazz);
769 Klass* k = java_lang_Class::as_Klass(mirror);
770
771 if (k == nullptr || !k->is_array_klass()) {
772 THROW(vmSymbols::java_lang_InvalidClassException());
773 } else if (k->is_typeArray_klass()) {
774 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
775 base = tak->array_header_in_bytes();
776 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
777 scale = (1 << tak->log2_element_size());
778 } else if (k->is_objArray_klass()) {
779 Klass* ek = ObjArrayKlass::cast(k)->element_klass();
780 if (!ek->is_identity_class() && !ek->is_abstract()) {
781 // Arrays of a concrete value class type can have multiple layouts
782 // There's no good value to return, so throwing an exception is the way out
783 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Arrays of a concrete value class don't have a single base and offset");
784 }
785 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
786 scale = heapOopSize;
787 } else {
788 ShouldNotReachHere();
789 }
790 }
791
792 UNSAFE_ENTRY(jint, Unsafe_ArrayInstanceBaseOffset0(JNIEnv *env, jobject unsafe, jarray array)) {
793 assert(array != nullptr, "array must not be null");
794 oop ar = JNIHandles::resolve_non_null(array);
795 assert(ar->is_array(), "Must be an array");
796 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
797 if (ak->is_refArray_klass()) {
798 return arrayOopDesc::base_offset_in_bytes(T_OBJECT);
799 } else if (ak->is_flatArray_klass()) {
800 FlatArrayKlass* fak = FlatArrayKlass::cast(ak);
801 return fak->array_header_in_bytes();
802 } else {
803 ShouldNotReachHere();
804 }
805 } UNSAFE_END
806
807 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) {
808 int base = 0, scale = 0;
809 getBaseAndScale(base, scale, clazz, CHECK_0);
810
811 return field_offset_from_byte_offset(base);
812 } UNSAFE_END
813
814
815 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) {
816 int base = 0, scale = 0;
817 getBaseAndScale(base, scale, clazz, CHECK_0);
818
819 // This VM packs both fields and array elements down to the byte.
820 // But watch out: If this changes, so that array references for
821 // a given primitive type (say, T_BOOLEAN) use different memory units
822 // than fields, this method MUST return zero for such arrays.
823 // For example, the VM used to store sub-word sized fields in full
824 // words in the object layout, so that accessors like getByte(Object,int)
825 // did not really do what one might expect for arrays. Therefore,
826 // this function used to report a zero scale factor, so that the user
827 // would know not to attempt to access sub-word array elements.
828 // // Code for unpacked fields:
829 // if (scale < wordSize) return 0;
830
831 // The following allows for a pretty general fieldOffset cookie scheme,
832 // but requires it to be linear in byte offset.
833 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
834 } UNSAFE_END
835
836 UNSAFE_ENTRY(jint, Unsafe_ArrayInstanceIndexScale0(JNIEnv *env, jobject unsafe, jarray array)) {
837 assert(array != nullptr, "array must not be null");
838 oop ar = JNIHandles::resolve_non_null(array);
839 assert(ar->is_array(), "Must be an array");
840 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
841 if (ak->is_refArray_klass()) {
842 return heapOopSize;
843 } else if (ak->is_flatArray_klass()) {
844 FlatArrayKlass* fak = FlatArrayKlass::cast(ak);
845 return fak->element_byte_size();
846 } else {
847 ShouldNotReachHere();
848 }
849 } UNSAFE_END
850
851 UNSAFE_ENTRY(jarray, Unsafe_GetFieldMap0(JNIEnv* env, jobject unsafe, jclass clazz)) {
852 oop mirror = JNIHandles::resolve_non_null(clazz);
853 Klass* k = java_lang_Class::as_Klass(mirror);
854
855 if (!k->is_inline_klass()) {
856 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not a concrete value class");
857 }
858 InlineKlass* vk = InlineKlass::cast(k);
859 oop map = mirror->obj_field(vk->acmp_maps_offset());
860 return (jarray) JNIHandles::make_local(THREAD, map);
861 } UNSAFE_END
862
863 UNSAFE_ENTRY(jlong, Unsafe_GetObjectSize0(JNIEnv* env, jobject o, jobject obj))
864 oop p = JNIHandles::resolve(obj);
865 return p->size() * HeapWordSize;
866 UNSAFE_END
867
868 static inline void throw_new(JNIEnv *env, const char *ename) {
869 jclass cls = env->FindClass(ename);
870 if (env->ExceptionCheck()) {
871 env->ExceptionClear();
872 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename);
873 return;
874 }
875
876 env->ThrowNew(cls, nullptr);
877 }
878
879 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
880 // Code lifted from JDK 1.3 ClassLoader.c
881
882 jbyte *body;
883 char *utfName = nullptr;
884 jclass result = nullptr;
885 char buf[128];
886
1060 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
1061 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
1062 case 1: a->double_at_put(0, (jdouble)la[0]); break;
1063 }
1064
1065 return ret;
1066 } UNSAFE_END
1067
1068
1069 /// JVM_RegisterUnsafeMethods
1070
1071 #define ADR "J"
1072
1073 #define LANG "Ljava/lang/"
1074
1075 #define OBJ LANG "Object;"
1076 #define CLS LANG "Class;"
1077 #define FLD LANG "reflect/Field;"
1078 #define THR LANG "Throwable;"
1079
1080 #define OBJ_ARR "[" OBJ
1081
1082 #define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;"
1083 #define DAC_Args CLS "[B[" OBJ
1084
1085 #define CC (char*) /*cast a literal from (const char*)*/
1086 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
1087
1088 #define DECLARE_GETPUTOOP(Type, Desc) \
1089 {CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \
1090 {CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \
1091 {CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \
1092 {CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)}
1093
1094
1095 static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = {
1096 {CC "getReference", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetReference)},
1097 {CC "putReference", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReference)},
1098 {CC "getReferenceVolatile", CC "(" OBJ "J)" OBJ, FN_PTR(Unsafe_GetReferenceVolatile)},
1099 {CC "putReferenceVolatile", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReferenceVolatile)},
1100
1101 {CC "isFlatField0", CC "(" OBJ ")Z", FN_PTR(Unsafe_IsFlatField)},
1102 {CC "hasNullMarker0", CC "(" OBJ ")Z", FN_PTR(Unsafe_HasNullMarker)},
1103 {CC "nullMarkerOffset0", CC "(" OBJ ")I", FN_PTR(Unsafe_NullMarkerOffset)},
1104 {CC "arrayLayout0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayLayout)},
1105 {CC "fieldLayout0", CC "(" OBJ ")I", FN_PTR(Unsafe_FieldLayout)},
1106 {CC "newSpecialArray", CC "(" CLS "II)[" OBJ, FN_PTR(Unsafe_NewSpecialArray)},
1107 {CC "getFlatValue", CC "(" OBJ "JI" CLS ")" OBJ, FN_PTR(Unsafe_GetFlatValue)},
1108 {CC "putFlatValue", CC "(" OBJ "JI" CLS OBJ ")V", FN_PTR(Unsafe_PutFlatValue)},
1109 {CC "valueHeaderSize", CC "(" CLS ")J", FN_PTR(Unsafe_ValueHeaderSize)},
1110 {CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)},
1111
1112 DECLARE_GETPUTOOP(Boolean, Z),
1113 DECLARE_GETPUTOOP(Byte, B),
1114 DECLARE_GETPUTOOP(Short, S),
1115 DECLARE_GETPUTOOP(Char, C),
1116 DECLARE_GETPUTOOP(Int, I),
1117 DECLARE_GETPUTOOP(Long, J),
1118 DECLARE_GETPUTOOP(Float, F),
1119 DECLARE_GETPUTOOP(Double, D),
1120
1121 {CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)},
1122 {CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)},
1123 {CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)},
1124
1125 {CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)},
1126 {CC "knownObjectFieldOffset0", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_KnownObjectFieldOffset0)},
1127 {CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)},
1128 {CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)},
1129 {CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)},
1130 {CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)},
1131 {CC "arrayInstanceBaseOffset0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayInstanceBaseOffset0)},
1132 {CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)},
1133 {CC "arrayInstanceIndexScale0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayInstanceIndexScale0)},
1134 {CC "getFieldMap0", CC "(Ljava/lang/Class;)[I", FN_PTR(Unsafe_GetFieldMap0)},
1135 {CC "getObjectSize0", CC "(Ljava/lang/Object;)J", FN_PTR(Unsafe_GetObjectSize0)},
1136
1137 {CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)},
1138 {CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)},
1139 {CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)},
1140 {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
1141 {CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)},
1142 {CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)},
1143 {CC "compareAndExchangeReference", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeReference)},
1144 {CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)},
1145 {CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)},
1146
1147 {CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)},
1148 {CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)},
1149
1150 {CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)},
1151
1152 {CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)},
1153 {CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)},
1154 {CC "writeback0", CC "(" "J" ")V", FN_PTR(Unsafe_WriteBack0)},
1155 {CC "writebackPreSync0", CC "()V", FN_PTR(Unsafe_WriteBackPreSync0)},
1156 {CC "writebackPostSync0", CC "()V", FN_PTR(Unsafe_WriteBackPostSync0)},
1157 {CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)},
1158
1159 {CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)},
1160 {CC "notifyStrictStaticAccess0", CC "(" CLS "JZ)V", FN_PTR(Unsafe_NotifyStrictStaticAccess0)},
1161
1162 {CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)},
1163 };
1164
1165 #undef CC
1166 #undef FN_PTR
1167
1168 #undef ADR
1169 #undef LANG
1170 #undef OBJ
1171 #undef CLS
1172 #undef FLD
1173 #undef THR
1174 #undef DC_Args
1175 #undef DAC_Args
1176
1177 #undef DECLARE_GETPUTOOP
1178
1179
1180 // This function is exported, used by NativeLookup.
|