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 /**
151 }
152 #endif
153 }
154
155 static inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
156 assert_field_offset_sane(p, field_offset);
157 uintptr_t base_address = cast_from_oop<uintptr_t>(p);
158 uintptr_t byte_offset = (uintptr_t)field_offset_to_byte_offset(field_offset);
159 return (void*)(base_address + byte_offset);
160 }
161
162 // Externally callable versions:
163 // (Use these in compiler intrinsics which emulate unsafe primitives.)
164 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) {
165 return field_offset;
166 }
167 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) {
168 return byte_offset;
169 }
170
171
172 ///// Data read/writes on the Java heap and in native (off-heap) memory
173
174 /**
175 * Helper class to wrap memory accesses in JavaThread::doing_unsafe_access()
176 */
177 class GuardUnsafeAccess {
178 JavaThread* _thread;
179
180 public:
181 GuardUnsafeAccess(JavaThread* thread) : _thread(thread) {
182 // native/off-heap access which may raise SIGBUS if accessing
183 // memory mapped file data in a region of the file which has
184 // been truncated and is now invalid.
185 _thread->set_doing_unsafe_access(true);
186 }
187
188 ~GuardUnsafeAccess() {
189 _thread->set_doing_unsafe_access(false);
190 }
191 };
230 jboolean normalize_for_read(jboolean x) {
231 return x != 0;
232 }
233
234 public:
235 MemoryAccess(JavaThread* thread, jobject obj, jlong offset)
236 : _thread(thread), _obj(JNIHandles::resolve(obj)), _offset((ptrdiff_t)offset) {
237 assert_field_offset_sane(_obj, offset);
238 }
239
240 T get() {
241 GuardUnsafeAccess guard(_thread);
242 return normalize_for_read(*addr());
243 }
244
245 // we use this method at some places for writing to 0 e.g. to cause a crash;
246 // ubsan does not know that this is the desired behavior
247 ATTRIBUTE_NO_UBSAN
248 void put(T x) {
249 GuardUnsafeAccess guard(_thread);
250 *addr() = normalize_for_write(x);
251 }
252
253
254 T get_volatile() {
255 GuardUnsafeAccess guard(_thread);
256 volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
257 return normalize_for_read(ret);
258 }
259
260 void put_volatile(T x) {
261 GuardUnsafeAccess guard(_thread);
262 RawAccess<MO_SEQ_CST>::store(addr(), normalize_for_write(x));
263 }
264 };
265
266 // These functions allow a null base pointer with an arbitrary address.
267 // But if the base pointer is non-null, the offset should make some sense.
268 // That is, it should be in the range [0, MAX_OBJECT_SIZE].
269 UNSAFE_ENTRY(jobject, Unsafe_GetReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
270 oop p = JNIHandles::resolve(obj);
271 assert_field_offset_sane(p, offset);
272 oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
273 return JNIHandles::make_local(THREAD, v);
274 } UNSAFE_END
275
276 UNSAFE_ENTRY(void, Unsafe_PutReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
277 oop x = JNIHandles::resolve(x_h);
278 oop p = JNIHandles::resolve(obj);
279 assert_field_offset_sane(p, offset);
280 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
281 } UNSAFE_END
282
283 UNSAFE_ENTRY(jobject, Unsafe_GetReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
284 oop p = JNIHandles::resolve(obj);
285 assert_field_offset_sane(p, offset);
286 oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
287 return JNIHandles::make_local(THREAD, v);
288 } UNSAFE_END
289
290 UNSAFE_ENTRY(void, Unsafe_PutReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
291 oop x = JNIHandles::resolve(x_h);
292 oop p = JNIHandles::resolve(obj);
293 assert_field_offset_sane(p, offset);
294 HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
295 } UNSAFE_END
296
297 UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
298 oop v = *(oop*) (address) addr;
299 return JNIHandles::make_local(THREAD, v);
300 } UNSAFE_END
301
302 #define DEFINE_GETSETOOP(java_type, Type) \
573 InstanceKlass* k = InstanceKlass::cast(klass);
574 k->initialize(CHECK);
575 }
576 }
577 UNSAFE_END
578
579 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) {
580 assert(clazz != nullptr, "clazz must not be null");
581
582 oop mirror = JNIHandles::resolve_non_null(clazz);
583 Klass* klass = java_lang_Class::as_Klass(mirror);
584
585 if (klass != nullptr && klass->should_be_initialized()) {
586 return true;
587 }
588
589 return false;
590 }
591 UNSAFE_END
592
593 static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) {
594 assert(clazz != nullptr, "clazz must not be null");
595
596 oop mirror = JNIHandles::resolve_non_null(clazz);
597 Klass* k = java_lang_Class::as_Klass(mirror);
598
599 if (k == nullptr || !k->is_array_klass()) {
600 THROW(vmSymbols::java_lang_InvalidClassException());
601 } else if (k->is_objArray_klass()) {
602 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
603 scale = heapOopSize;
604 } else if (k->is_typeArray_klass()) {
605 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
606 base = tak->array_header_in_bytes();
607 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
608 scale = (1 << tak->log2_element_size());
609 } else {
610 ShouldNotReachHere();
611 }
612 }
613
614 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) {
615 int base = 0, scale = 0;
616 getBaseAndScale(base, scale, clazz, CHECK_0);
617
618 return field_offset_from_byte_offset(base);
619 } UNSAFE_END
620
621
622 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) {
623 int base = 0, scale = 0;
624 getBaseAndScale(base, scale, clazz, CHECK_0);
625
626 // This VM packs both fields and array elements down to the byte.
627 // But watch out: If this changes, so that array references for
628 // a given primitive type (say, T_BOOLEAN) use different memory units
629 // than fields, this method MUST return zero for such arrays.
630 // For example, the VM used to store sub-word sized fields in full
631 // words in the object layout, so that accessors like getByte(Object,int)
632 // did not really do what one might expect for arrays. Therefore,
633 // this function used to report a zero scale factor, so that the user
634 // would know not to attempt to access sub-word array elements.
635 // // Code for unpacked fields:
636 // if (scale < wordSize) return 0;
637
638 // The following allows for a pretty general fieldOffset cookie scheme,
639 // but requires it to be linear in byte offset.
640 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
641 } UNSAFE_END
642
643
644 static inline void throw_new(JNIEnv *env, const char *ename) {
645 jclass cls = env->FindClass(ename);
646 if (env->ExceptionCheck()) {
647 env->ExceptionClear();
648 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename);
649 return;
650 }
651
652 env->ThrowNew(cls, nullptr);
653 }
654
655 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
656 // Code lifted from JDK 1.3 ClassLoader.c
657
658 jbyte *body;
659 char *utfName = nullptr;
660 jclass result = nullptr;
661 char buf[128];
662
836 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
837 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
838 case 1: a->double_at_put(0, (jdouble)la[0]); break;
839 }
840
841 return ret;
842 } UNSAFE_END
843
844
845 /// JVM_RegisterUnsafeMethods
846
847 #define ADR "J"
848
849 #define LANG "Ljava/lang/"
850
851 #define OBJ LANG "Object;"
852 #define CLS LANG "Class;"
853 #define FLD LANG "reflect/Field;"
854 #define THR LANG "Throwable;"
855
856 #define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;"
857 #define DAC_Args CLS "[B[" OBJ
858
859 #define CC (char*) /*cast a literal from (const char*)*/
860 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
861
862 #define DECLARE_GETPUTOOP(Type, Desc) \
863 {CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \
864 {CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \
865 {CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \
866 {CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)}
867
868
869 static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = {
870 {CC "getReference", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetReference)},
871 {CC "putReference", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReference)},
872 {CC "getReferenceVolatile", CC "(" OBJ "J)" OBJ, FN_PTR(Unsafe_GetReferenceVolatile)},
873 {CC "putReferenceVolatile", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReferenceVolatile)},
874
875 {CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)},
876
877 DECLARE_GETPUTOOP(Boolean, Z),
878 DECLARE_GETPUTOOP(Byte, B),
879 DECLARE_GETPUTOOP(Short, S),
880 DECLARE_GETPUTOOP(Char, C),
881 DECLARE_GETPUTOOP(Int, I),
882 DECLARE_GETPUTOOP(Long, J),
883 DECLARE_GETPUTOOP(Float, F),
884 DECLARE_GETPUTOOP(Double, D),
885
886 {CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)},
887 {CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)},
888 {CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)},
889
890 {CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)},
891 {CC "knownObjectFieldOffset0", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_KnownObjectFieldOffset0)},
892 {CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)},
893 {CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)},
894 {CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)},
895 {CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)},
896 {CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)},
897
898 {CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)},
899 {CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)},
900 {CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)},
901 {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
902 {CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)},
903 {CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)},
904 {CC "compareAndExchangeReference", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeReference)},
905 {CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)},
906 {CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)},
907
908 {CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)},
909 {CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)},
910
911 {CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)},
912
913 {CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)},
914 {CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)},
915 {CC "writeback0", CC "(" "J" ")V", FN_PTR(Unsafe_WriteBack0)},
916 {CC "writebackPreSync0", CC "()V", FN_PTR(Unsafe_WriteBackPreSync0)},
917 {CC "writebackPostSync0", CC "()V", FN_PTR(Unsafe_WriteBackPostSync0)},
918 {CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)},
919
920 {CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)},
921
922 {CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)},
923 };
924
925 #undef CC
926 #undef FN_PTR
927
928 #undef ADR
929 #undef LANG
930 #undef OBJ
931 #undef CLS
932 #undef FLD
933 #undef THR
934 #undef DC_Args
935 #undef DAC_Args
936
937 #undef DECLARE_GETPUTOOP
938
939
940 // This function is exported, used by NativeLookup.
|
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/typeArrayOop.inline.hpp"
49 #include "prims/jvmtiExport.hpp"
50 #include "prims/unsafe.hpp"
51 #include "runtime/fieldDescriptor.inline.hpp"
52 #include "runtime/globals.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/interfaceSupport.inline.hpp"
55 #include "runtime/javaThread.inline.hpp"
56 #include "runtime/jniHandles.inline.hpp"
57 #include "runtime/orderAccess.hpp"
58 #include "runtime/reflection.hpp"
59 #include "runtime/sharedRuntime.hpp"
60 #include "runtime/stubRoutines.hpp"
61 #include "runtime/threadSMR.hpp"
62 #include "runtime/vm_version.hpp"
63 #include "runtime/vmOperations.hpp"
64 #include "sanitizers/ub.hpp"
65 #include "services/threadService.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/copy.hpp"
68 #include "utilities/dtrace.hpp"
69 #include "utilities/macros.hpp"
70
71 /**
158 }
159 #endif
160 }
161
162 static inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
163 assert_field_offset_sane(p, field_offset);
164 uintptr_t base_address = cast_from_oop<uintptr_t>(p);
165 uintptr_t byte_offset = (uintptr_t)field_offset_to_byte_offset(field_offset);
166 return (void*)(base_address + byte_offset);
167 }
168
169 // Externally callable versions:
170 // (Use these in compiler intrinsics which emulate unsafe primitives.)
171 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) {
172 return field_offset;
173 }
174 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) {
175 return byte_offset;
176 }
177
178 ///// Data read/writes on the Java heap and in native (off-heap) memory
179
180 /**
181 * Helper class to wrap memory accesses in JavaThread::doing_unsafe_access()
182 */
183 class GuardUnsafeAccess {
184 JavaThread* _thread;
185
186 public:
187 GuardUnsafeAccess(JavaThread* thread) : _thread(thread) {
188 // native/off-heap access which may raise SIGBUS if accessing
189 // memory mapped file data in a region of the file which has
190 // been truncated and is now invalid.
191 _thread->set_doing_unsafe_access(true);
192 }
193
194 ~GuardUnsafeAccess() {
195 _thread->set_doing_unsafe_access(false);
196 }
197 };
236 jboolean normalize_for_read(jboolean x) {
237 return x != 0;
238 }
239
240 public:
241 MemoryAccess(JavaThread* thread, jobject obj, jlong offset)
242 : _thread(thread), _obj(JNIHandles::resolve(obj)), _offset((ptrdiff_t)offset) {
243 assert_field_offset_sane(_obj, offset);
244 }
245
246 T get() {
247 GuardUnsafeAccess guard(_thread);
248 return normalize_for_read(*addr());
249 }
250
251 // we use this method at some places for writing to 0 e.g. to cause a crash;
252 // ubsan does not know that this is the desired behavior
253 ATTRIBUTE_NO_UBSAN
254 void put(T x) {
255 GuardUnsafeAccess guard(_thread);
256 assert(_obj == nullptr || !_obj->is_inline_type() || _obj->mark().is_larval_state(), "must be an object instance or a larval inline type");
257 *addr() = normalize_for_write(x);
258 }
259
260 T get_volatile() {
261 GuardUnsafeAccess guard(_thread);
262 volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
263 return normalize_for_read(ret);
264 }
265
266 void put_volatile(T x) {
267 GuardUnsafeAccess guard(_thread);
268 RawAccess<MO_SEQ_CST>::store(addr(), normalize_for_write(x));
269 }
270 };
271
272 #ifdef ASSERT
273 /*
274 * Get the field descriptor of the field of the given object at the given offset.
275 */
276 static bool get_field_descriptor(oop p, jlong offset, fieldDescriptor* fd) {
277 bool found = false;
278 Klass* k = p->klass();
279 if (k->is_instance_klass()) {
280 InstanceKlass* ik = InstanceKlass::cast(k);
281 found = ik->find_field_from_offset((int)offset, false, fd);
282 if (!found && ik->is_mirror_instance_klass()) {
283 Klass* k2 = java_lang_Class::as_Klass(p);
284 if (k2->is_instance_klass()) {
285 ik = InstanceKlass::cast(k2);
286 found = ik->find_field_from_offset((int)offset, true, fd);
287 }
288 }
289 }
290 return found;
291 }
292 #endif // ASSERT
293
294 static void assert_and_log_unsafe_value_access(oop p, jlong offset, InlineKlass* vk) {
295 Klass* k = p->klass();
296 #ifdef ASSERT
297 if (k->is_instance_klass()) {
298 assert_field_offset_sane(p, offset);
299 fieldDescriptor fd;
300 bool found = get_field_descriptor(p, offset, &fd);
301 if (found) {
302 assert(found, "value field not found");
303 assert(fd.is_flat(), "field not flat");
304 } else {
305 if (log_is_enabled(Trace, valuetypes)) {
306 log_trace(valuetypes)("not a field in %s at offset " UINT64_FORMAT_X,
307 p->klass()->external_name(), (uint64_t)offset);
308 }
309 }
310 } else if (k->is_flatArray_klass()) {
311 FlatArrayKlass* vak = FlatArrayKlass::cast(k);
312 int index = (offset - vak->array_header_in_bytes()) / vak->element_byte_size();
313 address dest = (address)((flatArrayOop)p)->value_at_addr(index, vak->layout_helper());
314 assert(dest == (cast_from_oop<address>(p) + offset), "invalid offset");
315 } else {
316 ShouldNotReachHere();
317 }
318 #endif // ASSERT
319 if (log_is_enabled(Trace, valuetypes)) {
320 if (k->is_flatArray_klass()) {
321 FlatArrayKlass* vak = FlatArrayKlass::cast(k);
322 int index = (offset - vak->array_header_in_bytes()) / vak->element_byte_size();
323 address dest = (address)((flatArrayOop)p)->value_at_addr(index, vak->layout_helper());
324 log_trace(valuetypes)("%s array type %s index %d element size %d offset " UINT64_FORMAT_X " at " INTPTR_FORMAT,
325 p->klass()->external_name(), vak->external_name(),
326 index, vak->element_byte_size(), (uint64_t)offset, p2i(dest));
327 } else {
328 log_trace(valuetypes)("%s field type %s at offset " UINT64_FORMAT_X,
329 p->klass()->external_name(), vk->external_name(), (uint64_t)offset);
330 }
331 }
332 }
333
334 // These functions allow a null base pointer with an arbitrary address.
335 // But if the base pointer is non-null, the offset should make some sense.
336 // That is, it should be in the range [0, MAX_OBJECT_SIZE].
337 UNSAFE_ENTRY(jobject, Unsafe_GetReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
338 oop p = JNIHandles::resolve(obj);
339 assert_field_offset_sane(p, offset);
340 oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
341 return JNIHandles::make_local(THREAD, v);
342 } UNSAFE_END
343
344 UNSAFE_ENTRY(void, Unsafe_PutReference(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
345 oop x = JNIHandles::resolve(x_h);
346 oop p = JNIHandles::resolve(obj);
347 assert_field_offset_sane(p, offset);
348 assert(!p->is_inline_type() || p->mark().is_larval_state(), "must be an object instance or a larval inline type");
349 HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
350 } UNSAFE_END
351
352 UNSAFE_ENTRY(jlong, Unsafe_ValueHeaderSize(JNIEnv *env, jobject unsafe, jclass c)) {
353 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(c));
354 InlineKlass* vk = InlineKlass::cast(k);
355 return vk->payload_offset();
356 } UNSAFE_END
357
358 UNSAFE_ENTRY(jboolean, Unsafe_IsFlatField(JNIEnv *env, jobject unsafe, jobject o)) {
359 oop f = JNIHandles::resolve_non_null(o);
360 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
361 int slot = java_lang_reflect_Field::slot(f);
362 return InstanceKlass::cast(k)->field_is_flat(slot);
363 } UNSAFE_END
364
365 UNSAFE_ENTRY(jboolean, Unsafe_HasNullMarker(JNIEnv *env, jobject unsafe, jobject o)) {
366 oop f = JNIHandles::resolve_non_null(o);
367 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
368 int slot = java_lang_reflect_Field::slot(f);
369 return InstanceKlass::cast(k)->field_has_null_marker(slot);
370 } UNSAFE_END
371
372 UNSAFE_ENTRY(jint, Unsafe_NullMarkerOffset(JNIEnv *env, jobject unsafe, jobject o)) {
373 oop f = JNIHandles::resolve_non_null(o);
374 Klass* k = java_lang_Class::as_Klass(java_lang_reflect_Field::clazz(f));
375 int slot = java_lang_reflect_Field::slot(f);
376 return InstanceKlass::cast(k)->null_marker_offset(slot);
377 } UNSAFE_END
378
379 UNSAFE_ENTRY(jint, Unsafe_ArrayLayout(JNIEnv *env, jobject unsafe, jarray array)) {
380 oop ar = JNIHandles::resolve_non_null(array);
381 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
382 if (ak->is_refArray_klass()) {
383 return (jint)LayoutKind::REFERENCE;
384 } else if (ak->is_flatArray_klass()) {
385 return (jint)FlatArrayKlass::cast(ak)->layout_kind();
386 } else {
387 ShouldNotReachHere();
388 return -1;
389 }
390 } UNSAFE_END
391
392 UNSAFE_ENTRY(jint, Unsafe_FieldLayout(JNIEnv *env, jobject unsafe, jobject field)) {
393 assert(field != nullptr, "field must not be null");
394
395 oop reflected = JNIHandles::resolve_non_null(field);
396 oop mirror = java_lang_reflect_Field::clazz(reflected);
397 Klass* k = java_lang_Class::as_Klass(mirror);
398 int slot = java_lang_reflect_Field::slot(reflected);
399 int modifiers = java_lang_reflect_Field::modifiers(reflected);
400
401 if ((modifiers & JVM_ACC_STATIC) != 0) {
402 return (jint)LayoutKind::REFERENCE; // static fields are never flat
403 } else {
404 InstanceKlass* ik = InstanceKlass::cast(k);
405 if (ik->field_is_flat(slot)) {
406 return (jint)ik->inline_layout_info(slot).kind();
407 } else {
408 return (jint)LayoutKind::REFERENCE;
409 }
410 }
411 } UNSAFE_END
412
413 UNSAFE_ENTRY(jarray, Unsafe_NewSpecialArray(JNIEnv *env, jobject unsafe, jclass elmClass, jint len, jint layoutKind)) {
414 oop mirror = JNIHandles::resolve_non_null(elmClass);
415 Klass* klass = java_lang_Class::as_Klass(mirror);
416 klass->initialize(CHECK_NULL);
417 if (len < 0) {
418 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Array length is negative");
419 }
420 if (klass->is_array_klass() || klass->is_identity_class()) {
421 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Element class is not a value class");
422 }
423 if (klass->is_abstract()) {
424 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Element class is abstract");
425 }
426 LayoutKind lk = static_cast<LayoutKind>(layoutKind);
427 if (lk <= LayoutKind::REFERENCE || lk >= LayoutKind::UNKNOWN) {
428 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Invalid layout kind");
429 }
430 InlineKlass* vk = InlineKlass::cast(klass);
431 // WARNING: test below will need modifications when flat layouts supported for fields
432 // but not for arrays are introduce (NULLABLE_NON_ATOMIC_FLAT for instance)
433 if (!UseArrayFlattening || !vk->is_layout_supported(lk)) {
434 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "Layout not supported");
435 }
436 ArrayKlass::ArrayProperties props = ArrayKlass::ArrayProperties::DEFAULT;
437 switch(lk) {
438 case LayoutKind::ATOMIC_FLAT:
439 props = ArrayKlass::ArrayProperties::NULL_RESTRICTED;
440 break;
441 case LayoutKind::NON_ATOMIC_FLAT:
442 props = (ArrayKlass::ArrayProperties)(ArrayKlass::ArrayProperties::NULL_RESTRICTED | ArrayKlass::ArrayProperties::NON_ATOMIC);
443 break;
444 case LayoutKind::NULLABLE_ATOMIC_FLAT:
445 props = ArrayKlass::ArrayProperties::NON_ATOMIC;
446 break;
447 default:
448 ShouldNotReachHere();
449 }
450 oop array = oopFactory::new_flatArray(vk, len, props, lk, CHECK_NULL);
451 return (jarray) JNIHandles::make_local(THREAD, array);
452 } UNSAFE_END
453
454 UNSAFE_ENTRY(jobject, Unsafe_GetValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jclass vc)) {
455 oop base = JNIHandles::resolve(obj);
456 if (base == nullptr) {
457 THROW_NULL(vmSymbols::java_lang_NullPointerException());
458 }
459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
460 InlineKlass* vk = InlineKlass::cast(k);
461 assert_and_log_unsafe_value_access(base, offset, vk);
462 LayoutKind lk = LayoutKind::UNKNOWN;
463 if (base->is_array()) {
464 FlatArrayKlass* fak = FlatArrayKlass::cast(base->klass());
465 lk = fak->layout_kind();
466 } else {
467 fieldDescriptor fd;
468 InstanceKlass::cast(base->klass())->find_field_from_offset(offset, false, &fd);
469 lk = fd.field_holder()->inline_layout_info(fd.index()).kind();
470 }
471 Handle base_h(THREAD, base);
472 oop v = vk->read_payload_from_addr(base_h(), offset, lk, CHECK_NULL);
473 return JNIHandles::make_local(THREAD, v);
474 } UNSAFE_END
475
476 UNSAFE_ENTRY(jobject, Unsafe_GetFlatValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint layoutKind, jclass vc)) {
477 assert(layoutKind != (int)LayoutKind::REFERENCE, "This method handles only flat layouts");
478 oop base = JNIHandles::resolve(obj);
479 if (base == nullptr) {
480 THROW_NULL(vmSymbols::java_lang_NullPointerException());
481 }
482 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
483 InlineKlass* vk = InlineKlass::cast(k);
484 assert_and_log_unsafe_value_access(base, offset, vk);
485 LayoutKind lk = (LayoutKind)layoutKind;
486 Handle base_h(THREAD, base);
487 oop v = vk->read_payload_from_addr(base_h(), offset, lk, CHECK_NULL);
488 return JNIHandles::make_local(THREAD, v);
489 } UNSAFE_END
490
491 UNSAFE_ENTRY(void, Unsafe_PutValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jclass vc, jobject value)) {
492 oop base = JNIHandles::resolve(obj);
493 if (base == nullptr) {
494 THROW(vmSymbols::java_lang_NullPointerException());
495 }
496 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
497 InlineKlass* vk = InlineKlass::cast(k);
498 assert(!base->is_inline_type() || base->mark().is_larval_state(), "must be an object instance or a larval inline type");
499 assert_and_log_unsafe_value_access(base, offset, vk);
500 LayoutKind lk = LayoutKind::UNKNOWN;
501 if (base->is_array()) {
502 FlatArrayKlass* fak = FlatArrayKlass::cast(base->klass());
503 lk = fak->layout_kind();
504 } else {
505 fieldDescriptor fd;
506 InstanceKlass::cast(base->klass())->find_field_from_offset(offset, false, &fd);
507 lk = fd.field_holder()->inline_layout_info(fd.index()).kind();
508 }
509 oop v = JNIHandles::resolve(value);
510 vk->write_value_to_addr(v, ((char*)(oopDesc*)base) + offset, lk, true, CHECK);
511 } UNSAFE_END
512
513 UNSAFE_ENTRY(void, Unsafe_PutFlatValue(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint layoutKind, jclass vc, jobject value)) {
514 assert(layoutKind != (int)LayoutKind::REFERENCE, "This method handles only flat layouts");
515 oop base = JNIHandles::resolve(obj);
516 if (base == nullptr) {
517 THROW(vmSymbols::java_lang_NullPointerException());
518 }
519 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(vc));
520 InlineKlass* vk = InlineKlass::cast(k);
521 assert(!base->is_inline_type() || base->mark().is_larval_state(), "must be an object instance or a larval inline type");
522 assert_and_log_unsafe_value_access(base, offset, vk);
523 LayoutKind lk = (LayoutKind)layoutKind;
524 oop v = JNIHandles::resolve(value);
525 vk->write_value_to_addr(v, ((char*)(oopDesc*)base) + offset, lk, true, CHECK);
526 } UNSAFE_END
527
528 UNSAFE_ENTRY(jobject, Unsafe_MakePrivateBuffer(JNIEnv *env, jobject unsafe, jobject value)) {
529 oop v = JNIHandles::resolve_non_null(value);
530 assert(v->is_inline_type(), "must be an inline type instance");
531 Handle vh(THREAD, v);
532 InlineKlass* vk = InlineKlass::cast(v->klass());
533 instanceOop new_value = vk->allocate_instance_buffer(CHECK_NULL);
534 vk->copy_payload_to_addr(vk->payload_addr(vh()), vk->payload_addr(new_value), LayoutKind::BUFFERED, false);
535 markWord mark = new_value->mark();
536 new_value->set_mark(mark.enter_larval_state());
537 return JNIHandles::make_local(THREAD, new_value);
538 } UNSAFE_END
539
540 UNSAFE_ENTRY(jobject, Unsafe_FinishPrivateBuffer(JNIEnv *env, jobject unsafe, jobject value)) {
541 oop v = JNIHandles::resolve(value);
542 assert(v->mark().is_larval_state(), "must be a larval value");
543 markWord mark = v->mark();
544 v->set_mark(mark.exit_larval_state());
545 return JNIHandles::make_local(THREAD, v);
546 } UNSAFE_END
547
548 UNSAFE_ENTRY(jobject, Unsafe_GetReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) {
549 oop p = JNIHandles::resolve(obj);
550 assert_field_offset_sane(p, offset);
551 oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset);
552 return JNIHandles::make_local(THREAD, v);
553 } UNSAFE_END
554
555 UNSAFE_ENTRY(void, Unsafe_PutReferenceVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) {
556 oop x = JNIHandles::resolve(x_h);
557 oop p = JNIHandles::resolve(obj);
558 assert_field_offset_sane(p, offset);
559 HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x);
560 } UNSAFE_END
561
562 UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
563 oop v = *(oop*) (address) addr;
564 return JNIHandles::make_local(THREAD, v);
565 } UNSAFE_END
566
567 #define DEFINE_GETSETOOP(java_type, Type) \
838 InstanceKlass* k = InstanceKlass::cast(klass);
839 k->initialize(CHECK);
840 }
841 }
842 UNSAFE_END
843
844 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) {
845 assert(clazz != nullptr, "clazz must not be null");
846
847 oop mirror = JNIHandles::resolve_non_null(clazz);
848 Klass* klass = java_lang_Class::as_Klass(mirror);
849
850 if (klass != nullptr && klass->should_be_initialized()) {
851 return true;
852 }
853
854 return false;
855 }
856 UNSAFE_END
857
858 UNSAFE_ENTRY(void, Unsafe_NotifyStrictStaticAccess0(JNIEnv *env, jobject unsafe, jobject clazz,
859 jlong sfoffset, jboolean writing)) {
860 assert(clazz != nullptr, "clazz must not be null");
861
862 oop mirror = JNIHandles::resolve_non_null(clazz);
863 Klass* klass = java_lang_Class::as_Klass(mirror);
864
865 if (klass != nullptr && klass->is_instance_klass()) {
866 InstanceKlass* ik = InstanceKlass::cast(klass);
867 fieldDescriptor fd;
868 if (ik->find_local_field_from_offset((int)sfoffset, true, &fd)) {
869 // Note: The Unsafe API takes an OFFSET, but the InstanceKlass wants the INDEX.
870 // We could surface field indexes into Unsafe, but that's too much churn.
871 ik->notify_strict_static_access(fd.index(), writing, CHECK);
872 return;
873 }
874 }
875 THROW(vmSymbols::java_lang_InternalError());
876 }
877 UNSAFE_END
878
879 static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) {
880 assert(clazz != nullptr, "clazz must not be null");
881
882 oop mirror = JNIHandles::resolve_non_null(clazz);
883 Klass* k = java_lang_Class::as_Klass(mirror);
884
885 if (k == nullptr || !k->is_array_klass()) {
886 THROW(vmSymbols::java_lang_InvalidClassException());
887 } else if (k->is_typeArray_klass()) {
888 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
889 base = tak->array_header_in_bytes();
890 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
891 scale = (1 << tak->log2_element_size());
892 } else if (k->is_objArray_klass()) {
893 Klass* ek = ObjArrayKlass::cast(k)->element_klass();
894 if (!ek->is_identity_class() && !ek->is_abstract()) {
895 // Arrays of a concrete value class type can have multiple layouts
896 // There's no good value to return, so throwing an exception is the way out
897 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Arrays of a concrete value class don't have a single base and offset");
898 }
899 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
900 scale = heapOopSize;
901 } else {
902 ShouldNotReachHere();
903 }
904 }
905
906 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset1(JNIEnv *env, jobject unsafe, jarray array)) {
907 assert(array != nullptr, "array must not be null");
908 oop ar = JNIHandles::resolve_non_null(array);
909 assert(ar->is_array(), "Must be an array");
910 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
911 if (ak->is_refArray_klass()) {
912 return arrayOopDesc::base_offset_in_bytes(T_OBJECT);
913 } else if (ak->is_flatArray_klass()) {
914 FlatArrayKlass* fak = FlatArrayKlass::cast(ak);
915 return fak->array_header_in_bytes();
916 } else {
917 ShouldNotReachHere();
918 }
919 } UNSAFE_END
920
921 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) {
922 int base = 0, scale = 0;
923 getBaseAndScale(base, scale, clazz, CHECK_0);
924
925 return field_offset_from_byte_offset(base);
926 } UNSAFE_END
927
928
929 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) {
930 int base = 0, scale = 0;
931 getBaseAndScale(base, scale, clazz, CHECK_0);
932
933 // This VM packs both fields and array elements down to the byte.
934 // But watch out: If this changes, so that array references for
935 // a given primitive type (say, T_BOOLEAN) use different memory units
936 // than fields, this method MUST return zero for such arrays.
937 // For example, the VM used to store sub-word sized fields in full
938 // words in the object layout, so that accessors like getByte(Object,int)
939 // did not really do what one might expect for arrays. Therefore,
940 // this function used to report a zero scale factor, so that the user
941 // would know not to attempt to access sub-word array elements.
942 // // Code for unpacked fields:
943 // if (scale < wordSize) return 0;
944
945 // The following allows for a pretty general fieldOffset cookie scheme,
946 // but requires it to be linear in byte offset.
947 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
948 } UNSAFE_END
949
950 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale1(JNIEnv *env, jobject unsafe, jarray array)) {
951 assert(array != nullptr, "array must not be null");
952 oop ar = JNIHandles::resolve_non_null(array);
953 assert(ar->is_array(), "Must be an array");
954 ArrayKlass* ak = ArrayKlass::cast(ar->klass());
955 if (ak->is_refArray_klass()) {
956 return heapOopSize;
957 } else if (ak->is_flatArray_klass()) {
958 FlatArrayKlass* fak = FlatArrayKlass::cast(ak);
959 return fak->element_byte_size();
960 } else {
961 ShouldNotReachHere();
962 }
963 } UNSAFE_END
964
965 UNSAFE_ENTRY(jlong, Unsafe_GetObjectSize0(JNIEnv* env, jobject o, jobject obj))
966 oop p = JNIHandles::resolve(obj);
967 return p->size() * HeapWordSize;
968 UNSAFE_END
969
970
971 static inline void throw_new(JNIEnv *env, const char *ename) {
972 jclass cls = env->FindClass(ename);
973 if (env->ExceptionCheck()) {
974 env->ExceptionClear();
975 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename);
976 return;
977 }
978
979 env->ThrowNew(cls, nullptr);
980 }
981
982 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
983 // Code lifted from JDK 1.3 ClassLoader.c
984
985 jbyte *body;
986 char *utfName = nullptr;
987 jclass result = nullptr;
988 char buf[128];
989
1163 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
1164 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
1165 case 1: a->double_at_put(0, (jdouble)la[0]); break;
1166 }
1167
1168 return ret;
1169 } UNSAFE_END
1170
1171
1172 /// JVM_RegisterUnsafeMethods
1173
1174 #define ADR "J"
1175
1176 #define LANG "Ljava/lang/"
1177
1178 #define OBJ LANG "Object;"
1179 #define CLS LANG "Class;"
1180 #define FLD LANG "reflect/Field;"
1181 #define THR LANG "Throwable;"
1182
1183 #define OBJ_ARR "[" OBJ
1184
1185 #define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;"
1186 #define DAC_Args CLS "[B[" OBJ
1187
1188 #define CC (char*) /*cast a literal from (const char*)*/
1189 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
1190
1191 #define DECLARE_GETPUTOOP(Type, Desc) \
1192 {CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \
1193 {CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \
1194 {CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \
1195 {CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)}
1196
1197
1198 static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = {
1199 {CC "getReference", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetReference)},
1200 {CC "putReference", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReference)},
1201 {CC "getReferenceVolatile", CC "(" OBJ "J)" OBJ, FN_PTR(Unsafe_GetReferenceVolatile)},
1202 {CC "putReferenceVolatile", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutReferenceVolatile)},
1203
1204 {CC "isFlatField0", CC "(" OBJ ")Z", FN_PTR(Unsafe_IsFlatField)},
1205 {CC "hasNullMarker0", CC "(" OBJ ")Z", FN_PTR(Unsafe_HasNullMarker)},
1206 {CC "nullMarkerOffset0", CC "(" OBJ ")I", FN_PTR(Unsafe_NullMarkerOffset)},
1207 {CC "arrayLayout0", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayLayout)},
1208 {CC "fieldLayout0", CC "(" OBJ ")I", FN_PTR(Unsafe_FieldLayout)},
1209 {CC "newSpecialArray", CC "(" CLS "II)[" OBJ, FN_PTR(Unsafe_NewSpecialArray)},
1210 {CC "getValue", CC "(" OBJ "J" CLS ")" OBJ, FN_PTR(Unsafe_GetValue)},
1211 {CC "getFlatValue", CC "(" OBJ "JI" CLS ")" OBJ, FN_PTR(Unsafe_GetFlatValue)},
1212 {CC "putValue", CC "(" OBJ "J" CLS OBJ ")V", FN_PTR(Unsafe_PutValue)},
1213 {CC "putFlatValue", CC "(" OBJ "JI" CLS OBJ ")V", FN_PTR(Unsafe_PutFlatValue)},
1214 {CC "makePrivateBuffer", CC "(" OBJ ")" OBJ, FN_PTR(Unsafe_MakePrivateBuffer)},
1215 {CC "finishPrivateBuffer", CC "(" OBJ ")" OBJ, FN_PTR(Unsafe_FinishPrivateBuffer)},
1216 {CC "valueHeaderSize", CC "(" CLS ")J", FN_PTR(Unsafe_ValueHeaderSize)},
1217
1218 {CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)},
1219
1220 DECLARE_GETPUTOOP(Boolean, Z),
1221 DECLARE_GETPUTOOP(Byte, B),
1222 DECLARE_GETPUTOOP(Short, S),
1223 DECLARE_GETPUTOOP(Char, C),
1224 DECLARE_GETPUTOOP(Int, I),
1225 DECLARE_GETPUTOOP(Long, J),
1226 DECLARE_GETPUTOOP(Float, F),
1227 DECLARE_GETPUTOOP(Double, D),
1228
1229 {CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)},
1230 {CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)},
1231 {CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)},
1232
1233 {CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)},
1234 {CC "knownObjectFieldOffset0", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_KnownObjectFieldOffset0)},
1235 {CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)},
1236 {CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)},
1237 {CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)},
1238 {CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)},
1239 {CC "arrayBaseOffset1", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayBaseOffset1)},
1240 {CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)},
1241 {CC "arrayIndexScale1", CC "(" OBJ_ARR ")I", FN_PTR(Unsafe_ArrayIndexScale1)},
1242 {CC "getObjectSize0", CC "(Ljava/lang/Object;)J", FN_PTR(Unsafe_GetObjectSize0)},
1243
1244 {CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)},
1245 {CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)},
1246 {CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)},
1247 {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
1248 {CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)},
1249 {CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)},
1250 {CC "compareAndExchangeReference", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeReference)},
1251 {CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)},
1252 {CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)},
1253
1254 {CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)},
1255 {CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)},
1256
1257 {CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)},
1258
1259 {CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)},
1260 {CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)},
1261 {CC "writeback0", CC "(" "J" ")V", FN_PTR(Unsafe_WriteBack0)},
1262 {CC "writebackPreSync0", CC "()V", FN_PTR(Unsafe_WriteBackPreSync0)},
1263 {CC "writebackPostSync0", CC "()V", FN_PTR(Unsafe_WriteBackPostSync0)},
1264 {CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)},
1265
1266 {CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)},
1267 {CC "notifyStrictStaticAccess0", CC "(" CLS "JZ)V", FN_PTR(Unsafe_NotifyStrictStaticAccess0)},
1268
1269 {CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)},
1270 };
1271
1272 #undef CC
1273 #undef FN_PTR
1274
1275 #undef ADR
1276 #undef LANG
1277 #undef OBJ
1278 #undef CLS
1279 #undef FLD
1280 #undef THR
1281 #undef DC_Args
1282 #undef DAC_Args
1283
1284 #undef DECLARE_GETPUTOOP
1285
1286
1287 // This function is exported, used by NativeLookup.
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