vm/prims/unsafe.cpp

	unsafe.cpp revision 0
0N/A/*
0N/A * Copyright 2000-2007 Sun Microsystems, Inc.  All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0N/A * CA 95054 USA or visit www.sun.com if you need additional information or
0N/A * have any questions.
0N/A *
0N/A */
0N/A
0N/A/*
0N/A *      Implementation of class sun.misc.Unsafe
0N/A */
0N/A
0N/A#include "incls/_precompiled.incl"
0N/A#include "incls/_unsafe.cpp.incl"
0N/A
0N/A#define MAX_OBJECT_SIZE \
0N/A  ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \
0N/A    + ((julong)max_jint * sizeof(double)) )
0N/A
0N/A
0N/A#define UNSAFE_ENTRY(result_type, header) \
0N/A  JVM_ENTRY(result_type, header)
0N/A
0N/A// Can't use UNSAFE_LEAF because it has the signature of a straight
0N/A// call into the runtime (just like JVM_LEAF, funny that) but it's
0N/A// called like a Java Native and thus the wrapper built for it passes
0N/A// arguments like a JNI call.  It expects those arguments to be popped
0N/A// from the stack on Intel like all good JNI args are, and adjusts the
0N/A// stack according.  Since the JVM_LEAF call expects no extra
0N/A// arguments the stack isn't popped in the C code, is pushed by the
0N/A// wrapper and we get sick.
0N/A//#define UNSAFE_LEAF(result_type, header) \
0N/A//  JVM_LEAF(result_type, header)
0N/A
0N/A#define UNSAFE_END JVM_END
0N/A
0N/A#define UnsafeWrapper(arg) /*nothing, for the present*/
0N/A
0N/A
0N/Ainline void* addr_from_java(jlong addr) {
0N/A  // This assert fails in a variety of ways on 32-bit systems.
0N/A  // It is impossible to predict whether native code that converts
0N/A  // pointers to longs will sign-extend or zero-extend the addresses.
0N/A  //assert(addr == (uintptr_t)addr, "must not be odd high bits");
0N/A  return (void*)(uintptr_t)addr;
0N/A}
0N/A
0N/Ainline jlong addr_to_java(void* p) {
0N/A  assert(p == (void*)(uintptr_t)p, "must not be odd high bits");
0N/A  return (uintptr_t)p;
0N/A}
0N/A
0N/A
0N/A// Note: The VM's obj_field and related accessors use byte-scaled
0N/A// ("unscaled") offsets, just as the unsafe methods do.
0N/A
0N/A// However, the method Unsafe.fieldOffset explicitly declines to
0N/A// guarantee this.  The field offset values manipulated by the Java user
0N/A// through the Unsafe API are opaque cookies that just happen to be byte
0N/A// offsets.  We represent this state of affairs by passing the cookies
0N/A// through conversion functions when going between the VM and the Unsafe API.
0N/A// The conversion functions just happen to be no-ops at present.
0N/A
0N/Ainline jlong field_offset_to_byte_offset(jlong field_offset) {
0N/A  return field_offset;
0N/A}
0N/A
0N/Ainline jlong field_offset_from_byte_offset(jlong byte_offset) {
0N/A  return byte_offset;
0N/A}
0N/A
0N/Ainline jint invocation_key_from_method_slot(jint slot) {
0N/A  return slot;
0N/A}
0N/A
0N/Ainline jint invocation_key_to_method_slot(jint key) {
0N/A  return key;
0N/A}
0N/A
0N/Ainline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
0N/A  jlong byte_offset = field_offset_to_byte_offset(field_offset);
0N/A#ifdef ASSERT
0N/A  if (p != NULL) {
0N/A    assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset");
0N/A    if (byte_offset == (jint)byte_offset) {
0N/A      void* ptr_plus_disp = (address)p + byte_offset;
0N/A      assert((void*)p->obj_field_addr((jint)byte_offset) == ptr_plus_disp,
0N/A             "raw [ptr+disp] must be consistent with oop::field_base");
0N/A    }
0N/A  }
0N/A#endif
0N/A  if (sizeof(char*) == sizeof(jint))    // (this constant folds!)
0N/A    return (address)p + (jint) byte_offset;
0N/A  else
0N/A    return (address)p +        byte_offset;
0N/A}
0N/A
0N/A// Externally callable versions:
0N/A// (Use these in compiler intrinsics which emulate unsafe primitives.)
0N/Ajlong Unsafe_field_offset_to_byte_offset(jlong field_offset) {
0N/A  return field_offset;
0N/A}
0N/Ajlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) {
0N/A  return byte_offset;
0N/A}
0N/Ajint Unsafe_invocation_key_from_method_slot(jint slot) {
0N/A  return invocation_key_from_method_slot(slot);
0N/A}
0N/Ajint Unsafe_invocation_key_to_method_slot(jint key) {
0N/A  return invocation_key_to_method_slot(key);
0N/A}
0N/A
0N/A
0N/A///// Data in the Java heap.
0N/A
0N/A#define GET_FIELD(obj, offset, type_name, v) \
0N/A  oop p = JNIHandles::resolve(obj); \
0N/A  type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset)
0N/A
0N/A#define SET_FIELD(obj, offset, type_name, x) \
0N/A  oop p = JNIHandles::resolve(obj); \
0N/A  *(type_name*)index_oop_from_field_offset_long(p, offset) = x
0N/A
0N/A#define GET_FIELD_VOLATILE(obj, offset, type_name, v) \
0N/A  oop p = JNIHandles::resolve(obj); \
0N/A  volatile type_name v = *(volatile type_name*)index_oop_from_field_offset_long(p, offset)
0N/A
0N/A#define SET_FIELD_VOLATILE(obj, offset, type_name, x) \
0N/A  oop p = JNIHandles::resolve(obj); \
0N/A  *(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \
0N/A  OrderAccess::fence();
0N/A
0N/A// Get/SetObject must be special-cased, since it works with handles.
0N/A
0N/A// The xxx140 variants for backward compatibility do not allow a full-width offset.
0N/AUNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset))
0N/A  UnsafeWrapper("Unsafe_GetObject");
0N/A  if (obj == NULL)  THROW_0(vmSymbols::java_lang_NullPointerException());
0N/A  GET_FIELD(obj, offset, oop, v);
0N/A  return JNIHandles::make_local(env, v);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h))
0N/A  UnsafeWrapper("Unsafe_SetObject");
0N/A  if (obj == NULL)  THROW(vmSymbols::java_lang_NullPointerException());
0N/A  oop x = JNIHandles::resolve(x_h);
0N/A  //SET_FIELD(obj, offset, oop, x);
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  if (x != NULL) {
0N/A    // If there is a heap base pointer, we are obliged to emit a store barrier.
0N/A    oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
0N/A  } else {
0N/A    *(oop*)index_oop_from_field_offset_long(p, offset) = x;
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A// The normal variants allow a null base pointer with an arbitrary address.
0N/A// But if the base pointer is non-null, the offset should make some sense.
0N/A// That is, it should be in the range [0, MAX_OBJECT_SIZE].
0N/AUNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
0N/A  UnsafeWrapper("Unsafe_GetObject");
0N/A  GET_FIELD(obj, offset, oop, v);
0N/A  return JNIHandles::make_local(env, v);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
0N/A  UnsafeWrapper("Unsafe_SetObject");
0N/A  oop x = JNIHandles::resolve(x_h);
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
0N/A  UnsafeWrapper("Unsafe_GetObjectVolatile");
0N/A  GET_FIELD_VOLATILE(obj, offset, oop, v);
0N/A  return JNIHandles::make_local(env, v);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
0N/A  UnsafeWrapper("Unsafe_SetObjectVolatile");
0N/A  oop x = JNIHandles::resolve(x_h);
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
0N/A  OrderAccess::fence();
0N/AUNSAFE_END
0N/A
0N/A// Volatile long versions must use locks if !VM_Version::supports_cx8().
0N/A// support_cx8 is a surrogate for 'supports atomic long memory ops'.
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
0N/A  UnsafeWrapper("Unsafe_GetLongVolatile");
0N/A  {
0N/A    if (VM_Version::supports_cx8()) {
0N/A      GET_FIELD_VOLATILE(obj, offset, jlong, v);
0N/A      return v;
0N/A    }
0N/A    else {
0N/A      Handle p (THREAD, JNIHandles::resolve(obj));
0N/A      jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
0N/A      ObjectLocker ol(p, THREAD);
0N/A      jlong value = *addr;
0N/A      return value;
0N/A    }
0N/A  }
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x))
0N/A  UnsafeWrapper("Unsafe_SetLongVolatile");
0N/A  {
0N/A    if (VM_Version::supports_cx8()) {
0N/A      SET_FIELD_VOLATILE(obj, offset, jlong, x);
0N/A    }
0N/A    else {
0N/A      Handle p (THREAD, JNIHandles::resolve(obj));
0N/A      jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
0N/A      ObjectLocker ol(p, THREAD);
0N/A      *addr = x;
0N/A    }
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A
0N/A#define DEFINE_GETSETOOP(jboolean, Boolean) \
0N/A \
0N/AUNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \
0N/A  UnsafeWrapper("Unsafe_Get"#Boolean); \
0N/A  if (obj == NULL)  THROW_0(vmSymbols::java_lang_NullPointerException()); \
0N/A  GET_FIELD(obj, offset, jboolean, v); \
0N/A  return v; \
0N/AUNSAFE_END \
0N/A \
0N/AUNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \
0N/A  UnsafeWrapper("Unsafe_Set"#Boolean); \
0N/A  if (obj == NULL)  THROW(vmSymbols::java_lang_NullPointerException()); \
0N/A  SET_FIELD(obj, offset, jboolean, x); \
0N/AUNSAFE_END \
0N/A \
0N/AUNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \
0N/A  UnsafeWrapper("Unsafe_Get"#Boolean); \
0N/A  GET_FIELD(obj, offset, jboolean, v); \
0N/A  return v; \
0N/AUNSAFE_END \
0N/A \
0N/AUNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \
0N/A  UnsafeWrapper("Unsafe_Set"#Boolean); \
0N/A  SET_FIELD(obj, offset, jboolean, x); \
0N/AUNSAFE_END \
0N/A \
0N/A// END DEFINE_GETSETOOP.
0N/A
0N/A
0N/A#define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \
0N/A \
0N/AUNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \
0N/A  UnsafeWrapper("Unsafe_Get"#Boolean); \
0N/A  GET_FIELD_VOLATILE(obj, offset, jboolean, v); \
0N/A  return v; \
0N/AUNSAFE_END \
0N/A \
0N/AUNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \
0N/A  UnsafeWrapper("Unsafe_Set"#Boolean); \
0N/A  SET_FIELD_VOLATILE(obj, offset, jboolean, x); \
0N/AUNSAFE_END \
0N/A \
0N/A// END DEFINE_GETSETOOP_VOLATILE.
0N/A
0N/ADEFINE_GETSETOOP(jboolean, Boolean)
0N/ADEFINE_GETSETOOP(jbyte, Byte)
0N/ADEFINE_GETSETOOP(jshort, Short);
0N/ADEFINE_GETSETOOP(jchar, Char);
0N/ADEFINE_GETSETOOP(jint, Int);
0N/ADEFINE_GETSETOOP(jlong, Long);
0N/ADEFINE_GETSETOOP(jfloat, Float);
0N/ADEFINE_GETSETOOP(jdouble, Double);
0N/A
0N/ADEFINE_GETSETOOP_VOLATILE(jboolean, Boolean)
0N/ADEFINE_GETSETOOP_VOLATILE(jbyte, Byte)
0N/ADEFINE_GETSETOOP_VOLATILE(jshort, Short);
0N/ADEFINE_GETSETOOP_VOLATILE(jchar, Char);
0N/ADEFINE_GETSETOOP_VOLATILE(jint, Int);
0N/A// no long -- handled specially
0N/ADEFINE_GETSETOOP_VOLATILE(jfloat, Float);
0N/ADEFINE_GETSETOOP_VOLATILE(jdouble, Double);
0N/A
0N/A#undef DEFINE_GETSETOOP
0N/A
0N/A// The non-intrinsified versions of setOrdered just use setVolatile
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \
0N/A  UnsafeWrapper("Unsafe_SetOrderedInt"); \
0N/A  SET_FIELD_VOLATILE(obj, offset, jint, x); \
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
0N/A  UnsafeWrapper("Unsafe_SetOrderedObject");
0N/A  oop x = JNIHandles::resolve(x_h);
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
0N/A  OrderAccess::fence();
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x))
0N/A  UnsafeWrapper("Unsafe_SetOrderedLong");
0N/A  {
0N/A    if (VM_Version::supports_cx8()) {
0N/A      SET_FIELD_VOLATILE(obj, offset, jlong, x);
0N/A    }
0N/A    else {
0N/A      Handle p (THREAD, JNIHandles::resolve(obj));
0N/A      jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
0N/A      ObjectLocker ol(p, THREAD);
0N/A      *addr = x;
0N/A    }
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A////// Data in the C heap.
0N/A
0N/A// Note:  These do not throw NullPointerException for bad pointers.
0N/A// They just crash.  Only a oop base pointer can generate a NullPointerException.
0N/A//
0N/A#define DEFINE_GETSETNATIVE(java_type, Type, native_type) \
0N/A \
0N/AUNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \
0N/A  UnsafeWrapper("Unsafe_GetNative"#Type); \
0N/A  void* p = addr_from_java(addr); \
0N/A  JavaThread* t = JavaThread::current(); \
0N/A  t->set_doing_unsafe_access(true); \
0N/A  java_type x = *(volatile native_type*)p; \
0N/A  t->set_doing_unsafe_access(false); \
0N/A  return x; \
0N/AUNSAFE_END \
0N/A \
0N/AUNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \
0N/A  UnsafeWrapper("Unsafe_SetNative"#Type); \
0N/A  JavaThread* t = JavaThread::current(); \
0N/A  t->set_doing_unsafe_access(true); \
0N/A  void* p = addr_from_java(addr); \
0N/A  *(volatile native_type*)p = x; \
0N/A  t->set_doing_unsafe_access(false); \
0N/AUNSAFE_END \
0N/A \
0N/A// END DEFINE_GETSETNATIVE.
0N/A
0N/ADEFINE_GETSETNATIVE(jbyte, Byte, signed char)
0N/ADEFINE_GETSETNATIVE(jshort, Short, signed short);
0N/ADEFINE_GETSETNATIVE(jchar, Char, unsigned short);
0N/ADEFINE_GETSETNATIVE(jint, Int, jint);
0N/A// no long -- handled specially
0N/ADEFINE_GETSETNATIVE(jfloat, Float, float);
0N/ADEFINE_GETSETNATIVE(jdouble, Double, double);
0N/A
0N/A#undef DEFINE_GETSETNATIVE
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr))
0N/A  UnsafeWrapper("Unsafe_GetNativeLong");
0N/A  JavaThread* t = JavaThread::current();
0N/A  // We do it this way to avoid problems with access to heap using 64
0N/A  // bit loads, as jlong in heap could be not 64-bit aligned, and on
0N/A  // some CPUs (SPARC) it leads to SIGBUS.
0N/A  t->set_doing_unsafe_access(true);
0N/A  void* p = addr_from_java(addr);
0N/A  jlong x;
0N/A  if (((intptr_t)p & 7) == 0) {
0N/A    // jlong is aligned, do a volatile access
0N/A    x = *(volatile jlong*)p;
0N/A  } else {
0N/A    jlong_accessor acc;
0N/A    acc.words[0] = ((volatile jint*)p)[0];
0N/A    acc.words[1] = ((volatile jint*)p)[1];
0N/A    x = acc.long_value;
0N/A  }
0N/A  t->set_doing_unsafe_access(false);
0N/A  return x;
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x))
0N/A  UnsafeWrapper("Unsafe_SetNativeLong");
0N/A  JavaThread* t = JavaThread::current();
0N/A  // see comment for Unsafe_GetNativeLong
0N/A  t->set_doing_unsafe_access(true);
0N/A  void* p = addr_from_java(addr);
0N/A  if (((intptr_t)p & 7) == 0) {
0N/A    // jlong is aligned, do a volatile access
0N/A    *(volatile jlong*)p = x;
0N/A  } else {
0N/A    jlong_accessor acc;
0N/A    acc.long_value = x;
0N/A    ((volatile jint*)p)[0] = acc.words[0];
0N/A    ((volatile jint*)p)[1] = acc.words[1];
0N/A  }
0N/A  t->set_doing_unsafe_access(false);
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr))
0N/A  UnsafeWrapper("Unsafe_GetNativeAddress");
0N/A  void* p = addr_from_java(addr);
0N/A  return addr_to_java(*(void**)p);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x))
0N/A  UnsafeWrapper("Unsafe_SetNativeAddress");
0N/A  void* p = addr_from_java(addr);
0N/A  *(void**)p = addr_from_java(x);
0N/AUNSAFE_END
0N/A
0N/A
0N/A////// Allocation requests
0N/A
0N/AUNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls))
0N/A  UnsafeWrapper("Unsafe_AllocateInstance");
0N/A  {
0N/A    ThreadToNativeFromVM ttnfv(thread);
0N/A    return env->AllocObject(cls);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size))
0N/A  UnsafeWrapper("Unsafe_AllocateMemory");
0N/A  size_t sz = (size_t)size;
0N/A  if (sz != (julong)size || size < 0) {
0N/A    THROW_0(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  if (sz == 0) {
0N/A    return 0;
0N/A  }
0N/A  sz = round_to(sz, HeapWordSize);
0N/A  void* x = os::malloc(sz);
0N/A  if (x == NULL) {
0N/A    THROW_0(vmSymbols::java_lang_OutOfMemoryError());
0N/A  }
0N/A  //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize);
0N/A  return addr_to_java(x);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size))
0N/A  UnsafeWrapper("Unsafe_ReallocateMemory");
0N/A  void* p = addr_from_java(addr);
0N/A  size_t sz = (size_t)size;
0N/A  if (sz != (julong)size || size < 0) {
0N/A    THROW_0(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  if (sz == 0) {
0N/A    os::free(p);
0N/A    return 0;
0N/A  }
0N/A  sz = round_to(sz, HeapWordSize);
0N/A  void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz);
0N/A  if (x == NULL) {
0N/A    THROW_0(vmSymbols::java_lang_OutOfMemoryError());
0N/A  }
0N/A  return addr_to_java(x);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr))
0N/A  UnsafeWrapper("Unsafe_FreeMemory");
0N/A  void* p = addr_from_java(addr);
0N/A  if (p == NULL) {
0N/A    return;
0N/A  }
0N/A  os::free(p);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value))
0N/A  UnsafeWrapper("Unsafe_SetMemory");
0N/A  size_t sz = (size_t)size;
0N/A  if (sz != (julong)size || size < 0) {
0N/A    THROW(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  char* p = (char*) addr_from_java(addr);
0N/A  Copy::fill_to_memory_atomic(p, sz, value);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value))
0N/A  UnsafeWrapper("Unsafe_SetMemory");
0N/A  size_t sz = (size_t)size;
0N/A  if (sz != (julong)size || size < 0) {
0N/A    THROW(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  oop base = JNIHandles::resolve(obj);
0N/A  void* p = index_oop_from_field_offset_long(base, offset);
0N/A  Copy::fill_to_memory_atomic(p, sz, value);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size))
0N/A  UnsafeWrapper("Unsafe_CopyMemory");
0N/A  if (size == 0) {
0N/A    return;
0N/A  }
0N/A  size_t sz = (size_t)size;
0N/A  if (sz != (julong)size || size < 0) {
0N/A    THROW(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  void* src = addr_from_java(srcAddr);
0N/A  void* dst = addr_from_java(dstAddr);
0N/A  Copy::conjoint_memory_atomic(src, dst, sz);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size))
0N/A  UnsafeWrapper("Unsafe_CopyMemory");
0N/A  if (size == 0) {
0N/A    return;
0N/A  }
0N/A  size_t sz = (size_t)size;
0N/A  if (sz != (julong)size || size < 0) {
0N/A    THROW(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  oop srcp = JNIHandles::resolve(srcObj);
0N/A  oop dstp = JNIHandles::resolve(dstObj);
0N/A  if (dstp != NULL && !dstp->is_typeArray()) {
0N/A    // NYI:  This works only for non-oop arrays at present.
0N/A    // Generalizing it would be reasonable, but requires card marking.
0N/A    // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad.
0N/A    THROW(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A  void* src = index_oop_from_field_offset_long(srcp, srcOffset);
0N/A  void* dst = index_oop_from_field_offset_long(dstp, dstOffset);
0N/A  Copy::conjoint_memory_atomic(src, dst, sz);
0N/AUNSAFE_END
0N/A
0N/A
0N/A////// Random queries
0N/A
0N/A// See comment at file start about UNSAFE_LEAF
0N/A//UNSAFE_LEAF(jint, Unsafe_AddressSize())
0N/AUNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe))
0N/A  UnsafeWrapper("Unsafe_AddressSize");
0N/A  return sizeof(void*);
0N/AUNSAFE_END
0N/A
0N/A// See comment at file start about UNSAFE_LEAF
0N/A//UNSAFE_LEAF(jint, Unsafe_PageSize())
0N/AUNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe))
0N/A  UnsafeWrapper("Unsafe_PageSize");
0N/A  return os::vm_page_size();
0N/AUNSAFE_END
0N/A
0N/Ajint find_field_offset(jobject field, int must_be_static, TRAPS) {
0N/A  if (field == NULL) {
0N/A    THROW_0(vmSymbols::java_lang_NullPointerException());
0N/A  }
0N/A
0N/A  oop reflected   = JNIHandles::resolve_non_null(field);
0N/A  oop mirror      = java_lang_reflect_Field::clazz(reflected);
0N/A  klassOop k      = java_lang_Class::as_klassOop(mirror);
0N/A  int slot        = java_lang_reflect_Field::slot(reflected);
0N/A  int modifiers   = java_lang_reflect_Field::modifiers(reflected);
0N/A
0N/A  if (must_be_static >= 0) {
0N/A    int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0);
0N/A    if (must_be_static != really_is_static) {
0N/A      THROW_0(vmSymbols::java_lang_IllegalArgumentException());
0N/A    }
0N/A  }
0N/A
0N/A  int offset = instanceKlass::cast(k)->offset_from_fields(slot);
0N/A  return field_offset_from_byte_offset(offset);
0N/A}
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field))
0N/A  UnsafeWrapper("Unsafe_ObjectFieldOffset");
0N/A  return find_field_offset(field, 0, THREAD);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field))
0N/A  UnsafeWrapper("Unsafe_StaticFieldOffset");
0N/A  return find_field_offset(field, 1, THREAD);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field))
0N/A  UnsafeWrapper("Unsafe_StaticFieldBase");
0N/A  // Note:  In this VM implementation, a field address is always a short
0N/A  // offset from the base of a a klass metaobject.  Thus, the full dynamic
0N/A  // range of the return type is never used.  However, some implementations
0N/A  // might put the static field inside an array shared by many classes,
0N/A  // or even at a fixed address, in which case the address could be quite
0N/A  // large.  In that last case, this function would return NULL, since
0N/A  // the address would operate alone, without any base pointer.
0N/A
0N/A  if (field == NULL)  THROW_0(vmSymbols::java_lang_NullPointerException());
0N/A
0N/A  oop reflected   = JNIHandles::resolve_non_null(field);
0N/A  oop mirror      = java_lang_reflect_Field::clazz(reflected);
0N/A  int modifiers   = java_lang_reflect_Field::modifiers(reflected);
0N/A
0N/A  if ((modifiers & JVM_ACC_STATIC) == 0) {
0N/A    THROW_0(vmSymbols::java_lang_IllegalArgumentException());
0N/A  }
0N/A
0N/A  return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror));
0N/AUNSAFE_END
0N/A
0N/A//@deprecated
0N/AUNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field))
0N/A  UnsafeWrapper("Unsafe_FieldOffset");
0N/A  // tries (but fails) to be polymorphic between static and non-static:
0N/A  jlong offset = find_field_offset(field, -1, THREAD);
0N/A  guarantee(offset == (jint)offset, "offset fits in 32 bits");
0N/A  return (jint)offset;
0N/AUNSAFE_END
0N/A
0N/A//@deprecated
0N/AUNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz))
0N/A  UnsafeWrapper("Unsafe_StaticFieldBase");
0N/A  if (clazz == NULL) {
0N/A    THROW_0(vmSymbols::java_lang_NullPointerException());
0N/A  }
0N/A  return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz))
0N/A  UnsafeWrapper("Unsafe_EnsureClassInitialized");
0N/A  if (clazz == NULL) {
0N/A    THROW(vmSymbols::java_lang_NullPointerException());
0N/A  }
0N/A  oop mirror = JNIHandles::resolve_non_null(clazz);
0N/A  instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror));
0N/A  if (k != NULL) {
0N/A    k->initialize(CHECK);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/Astatic void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) {
0N/A  if (acls == NULL) {
0N/A    THROW(vmSymbols::java_lang_NullPointerException());
0N/A  }
0N/A  oop      mirror = JNIHandles::resolve_non_null(acls);
0N/A  klassOop k      = java_lang_Class::as_klassOop(mirror);
0N/A  if (k == NULL || !k->klass_part()->oop_is_array()) {
0N/A    THROW(vmSymbols::java_lang_InvalidClassException());
0N/A  } else if (k->klass_part()->oop_is_objArray()) {
0N/A    base  = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
0N/A    scale = oopSize;
0N/A  } else if (k->klass_part()->oop_is_typeArray()) {
0N/A    typeArrayKlass* tak = typeArrayKlass::cast(k);
0N/A    base  = tak->array_header_in_bytes();
0N/A    assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
0N/A    scale = (1 << tak->log2_element_size());
0N/A  } else {
0N/A    ShouldNotReachHere();
0N/A  }
0N/A}
0N/A
0N/AUNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls))
0N/A  UnsafeWrapper("Unsafe_ArrayBaseOffset");
0N/A  int base, scale;
0N/A  getBaseAndScale(base, scale, acls, CHECK_0);
0N/A  return field_offset_from_byte_offset(base);
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls))
0N/A  UnsafeWrapper("Unsafe_ArrayIndexScale");
0N/A  int base, scale;
0N/A  getBaseAndScale(base, scale, acls, CHECK_0);
0N/A  // This VM packs both fields and array elements down to the byte.
0N/A  // But watch out:  If this changes, so that array references for
0N/A  // a given primitive type (say, T_BOOLEAN) use different memory units
0N/A  // than fields, this method MUST return zero for such arrays.
0N/A  // For example, the VM used to store sub-word sized fields in full
0N/A  // words in the object layout, so that accessors like getByte(Object,int)
0N/A  // did not really do what one might expect for arrays.  Therefore,
0N/A  // this function used to report a zero scale factor, so that the user
0N/A  // would know not to attempt to access sub-word array elements.
0N/A  // // Code for unpacked fields:
0N/A  // if (scale < wordSize)  return 0;
0N/A
0N/A  // The following allows for a pretty general fieldOffset cookie scheme,
0N/A  // but requires it to be linear in byte offset.
0N/A  return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
0N/AUNSAFE_END
0N/A
0N/A
0N/Astatic inline void throw_new(JNIEnv *env, const char *ename) {
0N/A  char buf[100];
0N/A  strcpy(buf, "java/lang/");
0N/A  strcat(buf, ename);
0N/A  jclass cls = env->FindClass(buf);
0N/A  char* msg = NULL;
0N/A  env->ThrowNew(cls, msg);
0N/A}
0N/A
0N/Astatic jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
0N/A  {
0N/A    // Code lifted from JDK 1.3 ClassLoader.c
0N/A
0N/A    jbyte *body;
0N/A    char *utfName;
0N/A    jclass result = 0;
0N/A    char buf[128];
0N/A
0N/A    if (UsePerfData) {
0N/A      ClassLoader::unsafe_defineClassCallCounter()->inc();
0N/A    }
0N/A
0N/A    if (data == NULL) {
0N/A        throw_new(env, "NullPointerException");
0N/A        return 0;
0N/A    }
0N/A
0N/A    /* Work around 4153825. malloc crashes on Solaris when passed a
0N/A     * negative size.
0N/A     */
0N/A    if (length < 0) {
0N/A        throw_new(env, "ArrayIndexOutOfBoundsException");
0N/A        return 0;
0N/A    }
0N/A
0N/A    body = NEW_C_HEAP_ARRAY(jbyte, length);
0N/A
0N/A    if (body == 0) {
0N/A        throw_new(env, "OutOfMemoryError");
0N/A        return 0;
0N/A    }
0N/A
0N/A    env->GetByteArrayRegion(data, offset, length, body);
0N/A
0N/A    if (env->ExceptionOccurred())
0N/A        goto free_body;
0N/A
0N/A    if (name != NULL) {
0N/A        uint len = env->GetStringUTFLength(name);
0N/A        int unicode_len = env->GetStringLength(name);
0N/A        if (len >= sizeof(buf)) {
0N/A            utfName = NEW_C_HEAP_ARRAY(char, len + 1);
0N/A            if (utfName == NULL) {
0N/A                throw_new(env, "OutOfMemoryError");
0N/A                goto free_body;
0N/A            }
0N/A        } else {
0N/A            utfName = buf;
0N/A        }
0N/A        env->GetStringUTFRegion(name, 0, unicode_len, utfName);
0N/A        //VerifyFixClassname(utfName);
0N/A        for (uint i = 0; i < len; i++) {
0N/A          if (utfName[i] == '.')   utfName[i] = '/';
0N/A        }
0N/A    } else {
0N/A        utfName = NULL;
0N/A    }
0N/A
0N/A    result = JVM_DefineClass(env, utfName, loader, body, length, pd);
0N/A
0N/A    if (utfName && utfName != buf)
0N/A        FREE_C_HEAP_ARRAY(char, utfName);
0N/A
0N/A free_body:
0N/A    FREE_C_HEAP_ARRAY(jbyte, body);
0N/A    return result;
0N/A  }
0N/A}
0N/A
0N/A
0N/AUNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length))
0N/A  UnsafeWrapper("Unsafe_DefineClass");
0N/A  {
0N/A    ThreadToNativeFromVM ttnfv(thread);
0N/A
0N/A    int depthFromDefineClass0 = 1;
0N/A    jclass  caller = JVM_GetCallerClass(env, depthFromDefineClass0);
0N/A    jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller);
0N/A    jobject pd     = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller);
0N/A
0N/A    return Unsafe_DefineClass(env, name, data, offset, length, loader, pd);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd))
0N/A  UnsafeWrapper("Unsafe_DefineClass");
0N/A  {
0N/A    ThreadToNativeFromVM ttnfv(thread);
0N/A
0N/A    return Unsafe_DefineClass(env, name, data, offset, length, loader, pd);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj))
0N/A  UnsafeWrapper("Unsafe_MonitorEnter");
0N/A  {
0N/A    if (jobj == NULL) {
0N/A      THROW(vmSymbols::java_lang_NullPointerException());
0N/A    }
0N/A    Handle obj(thread, JNIHandles::resolve_non_null(jobj));
0N/A    ObjectSynchronizer::jni_enter(obj, CHECK);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj))
0N/A  UnsafeWrapper("Unsafe_TryMonitorEnter");
0N/A  {
0N/A    if (jobj == NULL) {
0N/A      THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
0N/A    }
0N/A    Handle obj(thread, JNIHandles::resolve_non_null(jobj));
0N/A    bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0);
0N/A    return (res ? JNI_TRUE : JNI_FALSE);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj))
0N/A  UnsafeWrapper("Unsafe_MonitorExit");
0N/A  {
0N/A    if (jobj == NULL) {
0N/A      THROW(vmSymbols::java_lang_NullPointerException());
0N/A    }
0N/A    Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
0N/A    ObjectSynchronizer::jni_exit(obj(), CHECK);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr))
0N/A  UnsafeWrapper("Unsafe_ThrowException");
0N/A  {
0N/A    ThreadToNativeFromVM ttnfv(thread);
0N/A    env->Throw(thr);
0N/A  }
0N/AUNSAFE_END
0N/A
0N/A// JSR166 ------------------------------------------------------------------
0N/A
0N/AUNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h))
0N/A  UnsafeWrapper("Unsafe_CompareAndSwapObject");
0N/A  oop x = JNIHandles::resolve(x_h);
0N/A  oop e = JNIHandles::resolve(e_h);
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  intptr_t* addr = (intptr_t *)index_oop_from_field_offset_long(p, offset);
0N/A  intptr_t res = Atomic::cmpxchg_ptr((intptr_t)x, addr, (intptr_t)e);
0N/A  jboolean success  = (res == (intptr_t)e);
0N/A  if (success)
0N/A    update_barrier_set((oop*)addr, x);
0N/A  return success;
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x))
0N/A  UnsafeWrapper("Unsafe_CompareAndSwapInt");
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  jint* addr = (jint *) index_oop_from_field_offset_long(p, offset);
0N/A  return (jint)(Atomic::cmpxchg(x, addr, e)) == e;
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x))
0N/A  UnsafeWrapper("Unsafe_CompareAndSwapLong");
0N/A  Handle p (THREAD, JNIHandles::resolve(obj));
0N/A  jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
0N/A  if (VM_Version::supports_cx8())
0N/A    return (jlong)(Atomic::cmpxchg(x, addr, e)) == e;
0N/A  else {
0N/A    jboolean success = false;
0N/A    ObjectLocker ol(p, THREAD);
0N/A    if (*addr == e) { *addr = x; success = true; }
0N/A    return success;
0N/A  }
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time))
0N/A  UnsafeWrapper("Unsafe_Park");
0N/A  JavaThreadParkedState jtps(thread, time != 0);
0N/A  thread->parker()->park(isAbsolute != 0, time);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread))
0N/A  UnsafeWrapper("Unsafe_Unpark");
0N/A  Parker* p = NULL;
0N/A  if (jthread != NULL) {
0N/A    oop java_thread = JNIHandles::resolve_non_null(jthread);
0N/A    if (java_thread != NULL) {
0N/A      jlong lp = java_lang_Thread::park_event(java_thread);
0N/A      if (lp != 0) {
0N/A        // This cast is OK even though the jlong might have been read
0N/A        // non-atomically on 32bit systems, since there, one word will
0N/A        // always be zero anyway and the value set is always the same
0N/A        p = (Parker*)addr_from_java(lp);
0N/A      } else {
0N/A        // Grab lock if apparently null or using older version of library
0N/A        MutexLocker mu(Threads_lock);
0N/A        java_thread = JNIHandles::resolve_non_null(jthread);
0N/A        if (java_thread != NULL) {
0N/A          JavaThread* thr = java_lang_Thread::thread(java_thread);
0N/A          if (thr != NULL) {
0N/A            p = thr->parker();
0N/A            if (p != NULL) { // Bind to Java thread for next time.
0N/A              java_lang_Thread::set_park_event(java_thread, addr_to_java(p));
0N/A            }
0N/A          }
0N/A        }
0N/A      }
0N/A    }
0N/A  }
0N/A  if (p != NULL) {
0N/A    p->unpark();
0N/A  }
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem))
0N/A  UnsafeWrapper("Unsafe_Loadavg");
0N/A  const int max_nelem = 3;
0N/A  double la[max_nelem];
0N/A  jint ret;
0N/A
0N/A  typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg));
0N/A  assert(a->is_typeArray(), "must be type array");
0N/A
0N/A  if (nelem < 0 || nelem > max_nelem || a->length() < nelem) {
0N/A    ThreadToNativeFromVM ttnfv(thread);
0N/A    throw_new(env, "ArrayIndexOutOfBoundsException");
0N/A    return -1;
0N/A  }
0N/A
0N/A  ret = os::loadavg(la, nelem);
0N/A  if (ret == -1) return -1;
0N/A
0N/A  // if successful, ret is the number of samples actually retrieved.
0N/A  assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value");
0N/A  switch(ret) {
0N/A    case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
0N/A    case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
0N/A    case 1: a->double_at_put(0, (jdouble)la[0]); break;
0N/A  }
0N/A  return ret;
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset))
0N/A  UnsafeWrapper("Unsafe_PrefetchRead");
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  void* addr = index_oop_from_field_offset_long(p, 0);
0N/A  Prefetch::read(addr, (intx)offset);
0N/AUNSAFE_END
0N/A
0N/AUNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset))
0N/A  UnsafeWrapper("Unsafe_PrefetchWrite");
0N/A  oop p = JNIHandles::resolve(obj);
0N/A  void* addr = index_oop_from_field_offset_long(p, 0);
0N/A  Prefetch::write(addr, (intx)offset);
0N/AUNSAFE_END
0N/A
0N/A
0N/A/// JVM_RegisterUnsafeMethods
0N/A
0N/A#define ADR "J"
0N/A
0N/A#define LANG "Ljava/lang/"
0N/A
0N/A#define OBJ LANG"Object;"
0N/A#define CLS LANG"Class;"
0N/A#define CTR LANG"reflect/Constructor;"
0N/A#define FLD LANG"reflect/Field;"
0N/A#define MTH LANG"reflect/Method;"
0N/A#define THR LANG"Throwable;"
0N/A
0N/A#define DC0_Args LANG"String;[BII"
0N/A#define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;"
0N/A
0N/A#define CC (char*)  /*cast a literal from (const char*)*/
0N/A#define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
0N/A
0N/A// define deprecated accessors for compabitility with 1.4.0
0N/A#define DECLARE_GETSETOOP_140(Boolean, Z) \
0N/A    {CC"get"#Boolean,      CC"("OBJ"I)"#Z,      FN_PTR(Unsafe_Get##Boolean##140)}, \
0N/A    {CC"put"#Boolean,      CC"("OBJ"I"#Z")V",   FN_PTR(Unsafe_Set##Boolean##140)}
0N/A
0N/A// Note:  In 1.4.1, getObject and kin take both int and long offsets.
0N/A#define DECLARE_GETSETOOP_141(Boolean, Z) \
0N/A    {CC"get"#Boolean,      CC"("OBJ"J)"#Z,      FN_PTR(Unsafe_Get##Boolean)}, \
0N/A    {CC"put"#Boolean,      CC"("OBJ"J"#Z")V",   FN_PTR(Unsafe_Set##Boolean)}
0N/A
0N/A// Note:  In 1.5.0, there are volatile versions too
0N/A#define DECLARE_GETSETOOP(Boolean, Z) \
0N/A    {CC"get"#Boolean,      CC"("OBJ"J)"#Z,      FN_PTR(Unsafe_Get##Boolean)}, \
0N/A    {CC"put"#Boolean,      CC"("OBJ"J"#Z")V",   FN_PTR(Unsafe_Set##Boolean)}, \
0N/A    {CC"get"#Boolean"Volatile",      CC"("OBJ"J)"#Z,      FN_PTR(Unsafe_Get##Boolean##Volatile)}, \
0N/A    {CC"put"#Boolean"Volatile",      CC"("OBJ"J"#Z")V",   FN_PTR(Unsafe_Set##Boolean##Volatile)}
0N/A
0N/A
0N/A#define DECLARE_GETSETNATIVE(Byte, B) \
0N/A    {CC"get"#Byte,         CC"("ADR")"#B,       FN_PTR(Unsafe_GetNative##Byte)}, \
0N/A    {CC"put"#Byte,         CC"("ADR#B")V",      FN_PTR(Unsafe_SetNative##Byte)}
0N/A
0N/A
0N/A
0N/A// %%% These are temporarily supported until the SDK sources
0N/A// contain the necessarily updated Unsafe.java.
0N/Astatic JNINativeMethod methods_140[] = {
0N/A
0N/A    {CC"getObject",        CC"("OBJ"I)"OBJ"",   FN_PTR(Unsafe_GetObject140)},
0N/A    {CC"putObject",        CC"("OBJ"I"OBJ")V",  FN_PTR(Unsafe_SetObject140)},
0N/A
0N/A    DECLARE_GETSETOOP_140(Boolean, Z),
0N/A    DECLARE_GETSETOOP_140(Byte, B),
0N/A    DECLARE_GETSETOOP_140(Short, S),
0N/A    DECLARE_GETSETOOP_140(Char, C),
0N/A    DECLARE_GETSETOOP_140(Int, I),
0N/A    DECLARE_GETSETOOP_140(Long, J),
0N/A    DECLARE_GETSETOOP_140(Float, F),
0N/A    DECLARE_GETSETOOP_140(Double, D),
0N/A
0N/A    DECLARE_GETSETNATIVE(Byte, B),
0N/A    DECLARE_GETSETNATIVE(Short, S),
0N/A    DECLARE_GETSETNATIVE(Char, C),
0N/A    DECLARE_GETSETNATIVE(Int, I),
0N/A    DECLARE_GETSETNATIVE(Long, J),
0N/A    DECLARE_GETSETNATIVE(Float, F),
0N/A    DECLARE_GETSETNATIVE(Double, D),
0N/A
0N/A    {CC"getAddress",         CC"("ADR")"ADR,             FN_PTR(Unsafe_GetNativeAddress)},
0N/A    {CC"putAddress",         CC"("ADR""ADR")V",          FN_PTR(Unsafe_SetNativeAddress)},
0N/A
0N/A    {CC"allocateMemory",     CC"(J)"ADR,                 FN_PTR(Unsafe_AllocateMemory)},
0N/A    {CC"reallocateMemory",   CC"("ADR"J)"ADR,            FN_PTR(Unsafe_ReallocateMemory)},
0N/A//  {CC"setMemory",          CC"("ADR"JB)V",             FN_PTR(Unsafe_SetMemory)},
0N/A//  {CC"copyMemory",         CC"("ADR ADR"J)V",          FN_PTR(Unsafe_CopyMemory)},
0N/A    {CC"freeMemory",         CC"("ADR")V",               FN_PTR(Unsafe_FreeMemory)},
0N/A
0N/A    {CC"fieldOffset",        CC"("FLD")I",               FN_PTR(Unsafe_FieldOffset)}, //deprecated
0N/A    {CC"staticFieldBase",    CC"("CLS")"OBJ,             FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated
0N/A    {CC"ensureClassInitialized",CC"("CLS")V",            FN_PTR(Unsafe_EnsureClassInitialized)},
0N/A    {CC"arrayBaseOffset",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayBaseOffset)},
0N/A    {CC"arrayIndexScale",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayIndexScale)},
0N/A    {CC"addressSize",        CC"()I",                    FN_PTR(Unsafe_AddressSize)},
0N/A    {CC"pageSize",           CC"()I",                    FN_PTR(Unsafe_PageSize)},
0N/A
0N/A    {CC"defineClass",        CC"("DC0_Args")"CLS,        FN_PTR(Unsafe_DefineClass0)},
0N/A    {CC"defineClass",        CC"("DC1_Args")"CLS,        FN_PTR(Unsafe_DefineClass1)},
0N/A    {CC"allocateInstance",   CC"("CLS")"OBJ,             FN_PTR(Unsafe_AllocateInstance)},
0N/A    {CC"monitorEnter",       CC"("OBJ")V",               FN_PTR(Unsafe_MonitorEnter)},
0N/A    {CC"monitorExit",        CC"("OBJ")V",               FN_PTR(Unsafe_MonitorExit)},
0N/A    {CC"throwException",     CC"("THR")V",               FN_PTR(Unsafe_ThrowException)}
0N/A};
0N/A
0N/A// These are the old methods prior to the JSR 166 changes in 1.5.0
0N/Astatic JNINativeMethod methods_141[] = {
0N/A
0N/A    {CC"getObject",        CC"("OBJ"J)"OBJ"",   FN_PTR(Unsafe_GetObject)},
0N/A    {CC"putObject",        CC"("OBJ"J"OBJ")V",  FN_PTR(Unsafe_SetObject)},
0N/A
0N/A    DECLARE_GETSETOOP_141(Boolean, Z),
0N/A    DECLARE_GETSETOOP_141(Byte, B),
0N/A    DECLARE_GETSETOOP_141(Short, S),
0N/A    DECLARE_GETSETOOP_141(Char, C),
0N/A    DECLARE_GETSETOOP_141(Int, I),
0N/A    DECLARE_GETSETOOP_141(Long, J),
0N/A    DECLARE_GETSETOOP_141(Float, F),
0N/A    DECLARE_GETSETOOP_141(Double, D),
0N/A
0N/A    DECLARE_GETSETNATIVE(Byte, B),
0N/A    DECLARE_GETSETNATIVE(Short, S),
0N/A    DECLARE_GETSETNATIVE(Char, C),
0N/A    DECLARE_GETSETNATIVE(Int, I),
0N/A    DECLARE_GETSETNATIVE(Long, J),
0N/A    DECLARE_GETSETNATIVE(Float, F),
0N/A    DECLARE_GETSETNATIVE(Double, D),
0N/A
0N/A    {CC"getAddress",         CC"("ADR")"ADR,             FN_PTR(Unsafe_GetNativeAddress)},
0N/A    {CC"putAddress",         CC"("ADR""ADR")V",          FN_PTR(Unsafe_SetNativeAddress)},
0N/A
0N/A    {CC"allocateMemory",     CC"(J)"ADR,                 FN_PTR(Unsafe_AllocateMemory)},
0N/A    {CC"reallocateMemory",   CC"("ADR"J)"ADR,            FN_PTR(Unsafe_ReallocateMemory)},
0N/A//  {CC"setMemory",          CC"("ADR"JB)V",             FN_PTR(Unsafe_SetMemory)},
0N/A//  {CC"copyMemory",         CC"("ADR ADR"J)V",          FN_PTR(Unsafe_CopyMemory)},
0N/A    {CC"freeMemory",         CC"("ADR")V",               FN_PTR(Unsafe_FreeMemory)},
0N/A
0N/A    {CC"objectFieldOffset",  CC"("FLD")J",               FN_PTR(Unsafe_ObjectFieldOffset)},
0N/A    {CC"staticFieldOffset",  CC"("FLD")J",               FN_PTR(Unsafe_StaticFieldOffset)},
0N/A    {CC"staticFieldBase",    CC"("FLD")"OBJ,             FN_PTR(Unsafe_StaticFieldBaseFromField)},
0N/A    {CC"ensureClassInitialized",CC"("CLS")V",            FN_PTR(Unsafe_EnsureClassInitialized)},
0N/A    {CC"arrayBaseOffset",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayBaseOffset)},
0N/A    {CC"arrayIndexScale",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayIndexScale)},
0N/A    {CC"addressSize",        CC"()I",                    FN_PTR(Unsafe_AddressSize)},
0N/A    {CC"pageSize",           CC"()I",                    FN_PTR(Unsafe_PageSize)},
0N/A
0N/A    {CC"defineClass",        CC"("DC0_Args")"CLS,        FN_PTR(Unsafe_DefineClass0)},
0N/A    {CC"defineClass",        CC"("DC1_Args")"CLS,        FN_PTR(Unsafe_DefineClass1)},
0N/A    {CC"allocateInstance",   CC"("CLS")"OBJ,             FN_PTR(Unsafe_AllocateInstance)},
0N/A    {CC"monitorEnter",       CC"("OBJ")V",               FN_PTR(Unsafe_MonitorEnter)},
0N/A    {CC"monitorExit",        CC"("OBJ")V",               FN_PTR(Unsafe_MonitorExit)},
0N/A    {CC"throwException",     CC"("THR")V",               FN_PTR(Unsafe_ThrowException)}
0N/A
0N/A};
0N/A
0N/A// These are the old methods prior to the JSR 166 changes in 1.6.0
0N/Astatic JNINativeMethod methods_15[] = {
0N/A
0N/A    {CC"getObject",        CC"("OBJ"J)"OBJ"",   FN_PTR(Unsafe_GetObject)},
0N/A    {CC"putObject",        CC"("OBJ"J"OBJ")V",  FN_PTR(Unsafe_SetObject)},
0N/A    {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"",   FN_PTR(Unsafe_GetObjectVolatile)},
0N/A    {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V",  FN_PTR(Unsafe_SetObjectVolatile)},
0N/A
0N/A
0N/A    DECLARE_GETSETOOP(Boolean, Z),
0N/A    DECLARE_GETSETOOP(Byte, B),
0N/A    DECLARE_GETSETOOP(Short, S),
0N/A    DECLARE_GETSETOOP(Char, C),
0N/A    DECLARE_GETSETOOP(Int, I),
0N/A    DECLARE_GETSETOOP(Long, J),
0N/A    DECLARE_GETSETOOP(Float, F),
0N/A    DECLARE_GETSETOOP(Double, D),
0N/A
0N/A    DECLARE_GETSETNATIVE(Byte, B),
0N/A    DECLARE_GETSETNATIVE(Short, S),
0N/A    DECLARE_GETSETNATIVE(Char, C),
0N/A    DECLARE_GETSETNATIVE(Int, I),
0N/A    DECLARE_GETSETNATIVE(Long, J),
0N/A    DECLARE_GETSETNATIVE(Float, F),
0N/A    DECLARE_GETSETNATIVE(Double, D),
0N/A
0N/A    {CC"getAddress",         CC"("ADR")"ADR,             FN_PTR(Unsafe_GetNativeAddress)},
0N/A    {CC"putAddress",         CC"("ADR""ADR")V",          FN_PTR(Unsafe_SetNativeAddress)},
0N/A
0N/A    {CC"allocateMemory",     CC"(J)"ADR,                 FN_PTR(Unsafe_AllocateMemory)},
0N/A    {CC"reallocateMemory",   CC"("ADR"J)"ADR,            FN_PTR(Unsafe_ReallocateMemory)},
0N/A//  {CC"setMemory",          CC"("ADR"JB)V",             FN_PTR(Unsafe_SetMemory)},
0N/A//  {CC"copyMemory",         CC"("ADR ADR"J)V",          FN_PTR(Unsafe_CopyMemory)},
0N/A    {CC"freeMemory",         CC"("ADR")V",               FN_PTR(Unsafe_FreeMemory)},
0N/A
0N/A    {CC"objectFieldOffset",  CC"("FLD")J",               FN_PTR(Unsafe_ObjectFieldOffset)},
0N/A    {CC"staticFieldOffset",  CC"("FLD")J",               FN_PTR(Unsafe_StaticFieldOffset)},
0N/A    {CC"staticFieldBase",    CC"("FLD")"OBJ,             FN_PTR(Unsafe_StaticFieldBaseFromField)},
0N/A    {CC"ensureClassInitialized",CC"("CLS")V",            FN_PTR(Unsafe_EnsureClassInitialized)},
0N/A    {CC"arrayBaseOffset",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayBaseOffset)},
0N/A    {CC"arrayIndexScale",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayIndexScale)},
0N/A    {CC"addressSize",        CC"()I",                    FN_PTR(Unsafe_AddressSize)},
0N/A    {CC"pageSize",           CC"()I",                    FN_PTR(Unsafe_PageSize)},
0N/A
0N/A    {CC"defineClass",        CC"("DC0_Args")"CLS,        FN_PTR(Unsafe_DefineClass0)},
0N/A    {CC"defineClass",        CC"("DC1_Args")"CLS,        FN_PTR(Unsafe_DefineClass1)},
0N/A    {CC"allocateInstance",   CC"("CLS")"OBJ,             FN_PTR(Unsafe_AllocateInstance)},
0N/A    {CC"monitorEnter",       CC"("OBJ")V",               FN_PTR(Unsafe_MonitorEnter)},
0N/A    {CC"monitorExit",        CC"("OBJ")V",               FN_PTR(Unsafe_MonitorExit)},
0N/A    {CC"throwException",     CC"("THR")V",               FN_PTR(Unsafe_ThrowException)},
0N/A    {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z",  FN_PTR(Unsafe_CompareAndSwapObject)},
0N/A    {CC"compareAndSwapInt",  CC"("OBJ"J""I""I"")Z",      FN_PTR(Unsafe_CompareAndSwapInt)},
0N/A    {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z",      FN_PTR(Unsafe_CompareAndSwapLong)},
0N/A    {CC"park",               CC"(ZJ)V",                  FN_PTR(Unsafe_Park)},
0N/A    {CC"unpark",             CC"("OBJ")V",               FN_PTR(Unsafe_Unpark)}
0N/A
0N/A};
0N/A
0N/A// These are the correct methods, moving forward:
0N/Astatic JNINativeMethod methods[] = {
0N/A
0N/A    {CC"getObject",        CC"("OBJ"J)"OBJ"",   FN_PTR(Unsafe_GetObject)},
0N/A    {CC"putObject",        CC"("OBJ"J"OBJ")V",  FN_PTR(Unsafe_SetObject)},
0N/A    {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"",   FN_PTR(Unsafe_GetObjectVolatile)},
0N/A    {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V",  FN_PTR(Unsafe_SetObjectVolatile)},
0N/A
0N/A
0N/A    DECLARE_GETSETOOP(Boolean, Z),
0N/A    DECLARE_GETSETOOP(Byte, B),
0N/A    DECLARE_GETSETOOP(Short, S),
0N/A    DECLARE_GETSETOOP(Char, C),
0N/A    DECLARE_GETSETOOP(Int, I),
0N/A    DECLARE_GETSETOOP(Long, J),
0N/A    DECLARE_GETSETOOP(Float, F),
0N/A    DECLARE_GETSETOOP(Double, D),
0N/A
0N/A    DECLARE_GETSETNATIVE(Byte, B),
0N/A    DECLARE_GETSETNATIVE(Short, S),
0N/A    DECLARE_GETSETNATIVE(Char, C),
0N/A    DECLARE_GETSETNATIVE(Int, I),
0N/A    DECLARE_GETSETNATIVE(Long, J),
0N/A    DECLARE_GETSETNATIVE(Float, F),
0N/A    DECLARE_GETSETNATIVE(Double, D),
0N/A
0N/A    {CC"getAddress",         CC"("ADR")"ADR,             FN_PTR(Unsafe_GetNativeAddress)},
0N/A    {CC"putAddress",         CC"("ADR""ADR")V",          FN_PTR(Unsafe_SetNativeAddress)},
0N/A
0N/A    {CC"allocateMemory",     CC"(J)"ADR,                 FN_PTR(Unsafe_AllocateMemory)},
0N/A    {CC"reallocateMemory",   CC"("ADR"J)"ADR,            FN_PTR(Unsafe_ReallocateMemory)},
0N/A//  {CC"setMemory",          CC"("ADR"JB)V",             FN_PTR(Unsafe_SetMemory)},
0N/A//  {CC"copyMemory",         CC"("ADR ADR"J)V",          FN_PTR(Unsafe_CopyMemory)},
0N/A    {CC"freeMemory",         CC"("ADR")V",               FN_PTR(Unsafe_FreeMemory)},
0N/A
0N/A    {CC"objectFieldOffset",  CC"("FLD")J",               FN_PTR(Unsafe_ObjectFieldOffset)},
0N/A    {CC"staticFieldOffset",  CC"("FLD")J",               FN_PTR(Unsafe_StaticFieldOffset)},
0N/A    {CC"staticFieldBase",    CC"("FLD")"OBJ,             FN_PTR(Unsafe_StaticFieldBaseFromField)},
0N/A    {CC"ensureClassInitialized",CC"("CLS")V",            FN_PTR(Unsafe_EnsureClassInitialized)},
0N/A    {CC"arrayBaseOffset",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayBaseOffset)},
0N/A    {CC"arrayIndexScale",    CC"("CLS")I",               FN_PTR(Unsafe_ArrayIndexScale)},
0N/A    {CC"addressSize",        CC"()I",                    FN_PTR(Unsafe_AddressSize)},
0N/A    {CC"pageSize",           CC"()I",                    FN_PTR(Unsafe_PageSize)},
0N/A
0N/A    {CC"defineClass",        CC"("DC0_Args")"CLS,        FN_PTR(Unsafe_DefineClass0)},
0N/A    {CC"defineClass",        CC"("DC1_Args")"CLS,        FN_PTR(Unsafe_DefineClass1)},
0N/A    {CC"allocateInstance",   CC"("CLS")"OBJ,             FN_PTR(Unsafe_AllocateInstance)},
0N/A    {CC"monitorEnter",       CC"("OBJ")V",               FN_PTR(Unsafe_MonitorEnter)},
0N/A    {CC"monitorExit",        CC"("OBJ")V",               FN_PTR(Unsafe_MonitorExit)},
0N/A    {CC"tryMonitorEnter",    CC"("OBJ")Z",               FN_PTR(Unsafe_TryMonitorEnter)},
0N/A    {CC"throwException",     CC"("THR")V",               FN_PTR(Unsafe_ThrowException)},
0N/A    {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z",  FN_PTR(Unsafe_CompareAndSwapObject)},
0N/A    {CC"compareAndSwapInt",  CC"("OBJ"J""I""I"")Z",      FN_PTR(Unsafe_CompareAndSwapInt)},
0N/A    {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z",      FN_PTR(Unsafe_CompareAndSwapLong)},
0N/A    {CC"putOrderedObject",   CC"("OBJ"J"OBJ")V",         FN_PTR(Unsafe_SetOrderedObject)},
0N/A    {CC"putOrderedInt",      CC"("OBJ"JI)V",             FN_PTR(Unsafe_SetOrderedInt)},
0N/A    {CC"putOrderedLong",     CC"("OBJ"JJ)V",             FN_PTR(Unsafe_SetOrderedLong)},
0N/A    {CC"park",               CC"(ZJ)V",                  FN_PTR(Unsafe_Park)},
0N/A    {CC"unpark",             CC"("OBJ")V",               FN_PTR(Unsafe_Unpark)}
0N/A
0N/A//    {CC"getLoadAverage",     CC"([DI)I",                 FN_PTR(Unsafe_Loadavg)},
0N/A
0N/A//    {CC"prefetchRead",       CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchRead)},
0N/A//    {CC"prefetchWrite",      CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchWrite)}
0N/A//    {CC"prefetchReadStatic", CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchRead)},
0N/A//    {CC"prefetchWriteStatic",CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchWrite)}
0N/A
0N/A};
0N/A
0N/AJNINativeMethod loadavg_method[] = {
0N/A    {CC"getLoadAverage",            CC"([DI)I",                 FN_PTR(Unsafe_Loadavg)}
0N/A};
0N/A
0N/AJNINativeMethod prefetch_methods[] = {
0N/A    {CC"prefetchRead",       CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchRead)},
0N/A    {CC"prefetchWrite",      CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchWrite)},
0N/A    {CC"prefetchReadStatic", CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchRead)},
0N/A    {CC"prefetchWriteStatic",CC"("OBJ"J)V",              FN_PTR(Unsafe_PrefetchWrite)}
0N/A};
0N/A
0N/AJNINativeMethod memcopy_methods[] = {
0N/A    {CC"copyMemory",         CC"("OBJ"J"OBJ"JJ)V",       FN_PTR(Unsafe_CopyMemory2)},
0N/A    {CC"setMemory",          CC"("OBJ"JJB)V",            FN_PTR(Unsafe_SetMemory2)}
0N/A};
0N/A
0N/AJNINativeMethod memcopy_methods_15[] = {
0N/A    {CC"setMemory",          CC"("ADR"JB)V",             FN_PTR(Unsafe_SetMemory)},
0N/A    {CC"copyMemory",         CC"("ADR ADR"J)V",          FN_PTR(Unsafe_CopyMemory)}
0N/A};
0N/A
0N/A
0N/A#undef CC
0N/A#undef FN_PTR
0N/A
0N/A#undef ADR
0N/A#undef LANG
0N/A#undef OBJ
0N/A#undef CLS
0N/A#undef CTR
0N/A#undef FLD
0N/A#undef MTH
0N/A#undef THR
0N/A#undef DC0_Args
0N/A#undef DC1_Args
0N/A
0N/A#undef DECLARE_GETSETOOP
0N/A#undef DECLARE_GETSETNATIVE
0N/A
0N/A
0N/A// This one function is exported, used by NativeLookup.
0N/A// The Unsafe_xxx functions above are called only from the interpreter.
0N/A// The optimizer looks at names and signatures to recognize
0N/A// individual functions.
0N/A
0N/AJVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls))
0N/A  UnsafeWrapper("JVM_RegisterUnsafeMethods");
0N/A  {
0N/A    ThreadToNativeFromVM ttnfv(thread);
0N/A    {
0N/A      env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod));
0N/A      if (env->ExceptionOccurred()) {
0N/A        if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A          tty->print_cr("Warning:  SDK 1.6 Unsafe.loadavg not found.");
0N/A        }
0N/A        env->ExceptionClear();
0N/A      }
0N/A    }
0N/A    {
0N/A      env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod));
0N/A      if (env->ExceptionOccurred()) {
0N/A        if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A          tty->print_cr("Warning:  SDK 1.6 Unsafe.prefetchRead/Write not found.");
0N/A        }
0N/A        env->ExceptionClear();
0N/A      }
0N/A    }
0N/A    {
0N/A      env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod));
0N/A      if (env->ExceptionOccurred()) {
0N/A        if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A          tty->print_cr("Warning:  SDK 1.7 Unsafe.copyMemory not found.");
0N/A        }
0N/A        env->ExceptionClear();
0N/A        env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod));
0N/A        if (env->ExceptionOccurred()) {
0N/A          if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A            tty->print_cr("Warning:  SDK 1.5 Unsafe.copyMemory not found.");
0N/A          }
0N/A          env->ExceptionClear();
0N/A        }
0N/A      }
0N/A    }
0N/A    int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod));
0N/A    if (env->ExceptionOccurred()) {
0N/A      if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A        tty->print_cr("Warning:  SDK 1.6 version of Unsafe not found.");
0N/A      }
0N/A      env->ExceptionClear();
0N/A      // %%% For now, be backward compatible with an older class:
0N/A      status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod));
0N/A    }
0N/A    if (env->ExceptionOccurred()) {
0N/A      if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A        tty->print_cr("Warning:  SDK 1.5 version of Unsafe not found.");
0N/A      }
0N/A      env->ExceptionClear();
0N/A      // %%% For now, be backward compatible with an older class:
0N/A      status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod));
0N/A    }
0N/A    if (env->ExceptionOccurred()) {
0N/A      if (PrintMiscellaneous && (Verbose || WizardMode)) {
0N/A        tty->print_cr("Warning:  SDK 1.4.1 version of Unsafe not found.");
0N/A      }
0N/A      env->ExceptionClear();
0N/A      // %%% For now, be backward compatible with an older class:
0N/A      status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod));
0N/A    }
0N/A    guarantee(status == 0, "register unsafe natives");
0N/A  }
0N/AJVM_END