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8277863: Deprecate sun.misc.Unsafe methods that return offsets

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Reviewed-by: psandoz, mchung
This commit is contained in:
Alan Bateman 2021-12-07 14:21:47 +00:00
parent 35361270cb
commit 56ca66e86f
1 changed files with 20 additions and 0 deletions
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20
src/jdk.unsupported/share/classes/sun/misc/Unsafe.java
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@ -633,8 +633,15 @@ public final class Unsafe {
* the field locations in a form usable by {@link #getInt(Object,long)}.
* Therefore, code which will be ported to such JVMs on 64-bit platforms
* must preserve all bits of static field offsets.
*
* @deprecated The guarantee that a field will always have the same offset
* and base may not be true in a future release. The ability to provide an
* offset and object reference to a heap memory accessor will be removed
* in a future release. Use {@link java.lang.invoke.VarHandle} instead.
*
* @see #getInt(Object, long)
*/
@Deprecated(since="18")
@ForceInline
public long objectFieldOffset(Field f) {
if (f == null) {
@ -665,8 +672,15 @@ public final class Unsafe {
* a few bits to encode an offset within a non-array object,
* However, for consistency with other methods in this class,
* this method reports its result as a long value.
*
* @deprecated The guarantee that a field will always have the same offset
* and base may not be true in a future release. The ability to provide an
* offset and object reference to a heap memory accessor will be removed
* in a future release. Use {@link java.lang.invoke.VarHandle} instead.
*
* @see #getInt(Object, long)
*/
@Deprecated(since="18")
@ForceInline
public long staticFieldOffset(Field f) {
if (f == null) {
@ -691,7 +705,13 @@ public final class Unsafe {
* which is a "cookie", not guaranteed to be a real Object, and it should
* not be used in any way except as argument to the get and put routines in
* this class.
*
* @deprecated The guarantee that a field will always have the same offset
* and base may not be true in a future release. The ability to provide an
* offset and object reference to a heap memory accessor will be removed
* in a future release. Use {@link java.lang.invoke.VarHandle} instead.
*/
@Deprecated(since="18")
@ForceInline
public Object staticFieldBase(Field f) {
if (f == null) {