src/java.base/share/classes/sun/misc/Unsafe.java
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jdk Cdiff src/java.base/share/classes/sun/misc/Unsafe.java
src/java.base/share/classes/sun/misc/Unsafe.java
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rev 13795 : [mq]: unsafejavachecks1
*** 23,33 ****
* questions.
*/
package sun.misc;
! import jdk.internal.HotSpotIntrinsicCandidate;
import jdk.internal.misc.VM;
import sun.reflect.CallerSensitive;
import sun.reflect.Reflection;
import java.lang.reflect.Field;
--- 23,33 ----
* questions.
*/
package sun.misc;
! import jdk.internal.vm.annotation.ForceInline;
import jdk.internal.misc.VM;
import sun.reflect.CallerSensitive;
import sun.reflect.Reflection;
import java.lang.reflect.Field;
*** 37,61 ****
/**
* A collection of methods for performing low-level, unsafe operations.
* Although the class and all methods are public, use of this class is
* limited because only trusted code can obtain instances of it.
*
* @author John R. Rose
* @see #getUnsafe
*/
public final class Unsafe {
- private static native void registerNatives();
static {
- registerNatives();
sun.reflect.Reflection.registerMethodsToFilter(Unsafe.class, "getUnsafe");
}
private Unsafe() {}
private static final Unsafe theUnsafe = new Unsafe();
/**
* Provides the caller with the capability of performing unsafe
* operations.
*
--- 37,69 ----
/**
* A collection of methods for performing low-level, unsafe operations.
* Although the class and all methods are public, use of this class is
* limited because only trusted code can obtain instances of it.
*
+ * <em>Note:</em> It is the resposibility of the caller to make sure
+ * arguments are checked before methods of this class are
+ * called. While some rudimentary checks are performed on the input,
+ * the checks are best effort and when performance is an overriding
+ * priority, as when methods of this class are optimized by the
+ * runtime compiler, some or all checks (if any) may be elided. Hence,
+ * the caller must not rely on the checks and corresponding
+ * exceptions!
+ *
* @author John R. Rose
* @see #getUnsafe
*/
public final class Unsafe {
static {
sun.reflect.Reflection.registerMethodsToFilter(Unsafe.class, "getUnsafe");
}
private Unsafe() {}
private static final Unsafe theUnsafe = new Unsafe();
+ private static final jdk.internal.misc.Unsafe theInternalUnsafe = jdk.internal.misc.Unsafe.getUnsafe();
/**
* Provides the caller with the capability of performing unsafe
* operations.
*
*** 148,159 ****
* statically
* @return the value fetched from the indicated Java variable
* @throws RuntimeException No defined exceptions are thrown, not even
* {@link NullPointerException}
*/
! @HotSpotIntrinsicCandidate
! public native int getInt(Object o, long offset);
/**
* Stores a value into a given Java variable.
* <p>
* The first two parameters are interpreted exactly as with
--- 156,169 ----
* statically
* @return the value fetched from the indicated Java variable
* @throws RuntimeException No defined exceptions are thrown, not even
* {@link NullPointerException}
*/
! @ForceInline
! public int getInt(Object o, long offset) {
! return theInternalUnsafe.getInt(o, offset);
! }
/**
* Stores a value into a given Java variable.
* <p>
* The first two parameters are interpreted exactly as with
*** 171,189 ****
* statically
* @param x the value to store into the indicated Java variable
* @throws RuntimeException No defined exceptions are thrown, not even
* {@link NullPointerException}
*/
! @HotSpotIntrinsicCandidate
! public native void putInt(Object o, long offset, int x);
/**
* Fetches a reference value from a given Java variable.
* @see #getInt(Object, long)
*/
! @HotSpotIntrinsicCandidate
! public native Object getObject(Object o, long offset);
/**
* Stores a reference value into a given Java variable.
* <p>
* Unless the reference {@code x} being stored is either null
--- 181,203 ----
* statically
* @param x the value to store into the indicated Java variable
* @throws RuntimeException No defined exceptions are thrown, not even
* {@link NullPointerException}
*/
! @ForceInline
! public void putInt(Object o, long offset, int x) {
! theInternalUnsafe.putInt(o, offset, x);
! }
/**
* Fetches a reference value from a given Java variable.
* @see #getInt(Object, long)
*/
! @ForceInline
! public Object getObject(Object o, long offset) {
! return theInternalUnsafe.getObject(o, offset);
! }
/**
* Stores a reference value into a given Java variable.
* <p>
* Unless the reference {@code x} being stored is either null
*** 191,333 ****
* If the reference {@code o} is non-null, card marks or
* other store barriers for that object (if the VM requires them)
* are updated.
* @see #putInt(Object, long, int)
*/
! @HotSpotIntrinsicCandidate
! public native void putObject(Object o, long offset, Object x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native boolean getBoolean(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putBoolean(Object o, long offset, boolean x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native byte getByte(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putByte(Object o, long offset, byte x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native short getShort(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putShort(Object o, long offset, short x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native char getChar(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putChar(Object o, long offset, char x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native long getLong(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putLong(Object o, long offset, long x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native float getFloat(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putFloat(Object o, long offset, float x);
/** @see #getInt(Object, long) */
! @HotSpotIntrinsicCandidate
! public native double getDouble(Object o, long offset);
/** @see #putInt(Object, long, int) */
! @HotSpotIntrinsicCandidate
! public native void putDouble(Object o, long offset, double x);
// These read VM internal data.
/**
* Fetches an uncompressed reference value from a given native variable
* ignoring the VM's compressed references mode.
*
* @param address a memory address locating the variable
* @return the value fetched from the indicated native variable
*/
! public native Object getUncompressedObject(long address);
/**
* Fetches the {@link java.lang.Class} Java mirror for the given native
* metaspace {@code Klass} pointer.
*
* @param metaspaceKlass a native metaspace {@code Klass} pointer
* @return the {@link java.lang.Class} Java mirror
*/
! public native Class<?> getJavaMirror(long metaspaceKlass);
/**
* Fetches a native metaspace {@code Klass} pointer for the given Java
* object.
*
* @param o Java heap object for which to fetch the class pointer
* @return a native metaspace {@code Klass} pointer
*/
! public native long getKlassPointer(Object o);
// These work on values in the C heap.
/**
* Fetches a value from a given memory address. If the address is zero, or
* does not point into a block obtained from {@link #allocateMemory}, the
* results are undefined.
*
* @see #allocateMemory
*/
! @HotSpotIntrinsicCandidate
! public native byte getByte(long address);
/**
* Stores a value into a given memory address. If the address is zero, or
* does not point into a block obtained from {@link #allocateMemory}, the
* results are undefined.
*
* @see #getByte(long)
*/
! @HotSpotIntrinsicCandidate
! public native void putByte(long address, byte x);
/** @see #getByte(long) */
! @HotSpotIntrinsicCandidate
! public native short getShort(long address);
/** @see #putByte(long, byte) */
! @HotSpotIntrinsicCandidate
! public native void putShort(long address, short x);
/** @see #getByte(long) */
! @HotSpotIntrinsicCandidate
! public native char getChar(long address);
/** @see #putByte(long, byte) */
! @HotSpotIntrinsicCandidate
! public native void putChar(long address, char x);
/** @see #getByte(long) */
! @HotSpotIntrinsicCandidate
! public native int getInt(long address);
/** @see #putByte(long, byte) */
! @HotSpotIntrinsicCandidate
! public native void putInt(long address, int x);
/** @see #getByte(long) */
! @HotSpotIntrinsicCandidate
! public native long getLong(long address);
/** @see #putByte(long, byte) */
! @HotSpotIntrinsicCandidate
! public native void putLong(long address, long x);
/** @see #getByte(long) */
! @HotSpotIntrinsicCandidate
! public native float getFloat(long address);
/** @see #putByte(long, byte) */
! @HotSpotIntrinsicCandidate
! public native void putFloat(long address, float x);
/** @see #getByte(long) */
! @HotSpotIntrinsicCandidate
! public native double getDouble(long address);
/** @see #putByte(long, byte) */
! @HotSpotIntrinsicCandidate
! public native void putDouble(long address, double x);
/**
* Fetches a native pointer from a given memory address. If the address is
* zero, or does not point into a block obtained from {@link
* #allocateMemory}, the results are undefined.
--- 205,440 ----
* If the reference {@code o} is non-null, card marks or
* other store barriers for that object (if the VM requires them)
* are updated.
* @see #putInt(Object, long, int)
*/
! @ForceInline
! public void putObject(Object o, long offset, Object x) {
! theInternalUnsafe.putObject(o, offset, x);
! }
/** @see #getInt(Object, long) */
! @ForceInline
! public boolean getBoolean(Object o, long offset) {
! return theInternalUnsafe.getBoolean(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putBoolean(Object o, long offset, boolean x) {
! theInternalUnsafe.putBoolean(o, offset, x);
! }
!
/** @see #getInt(Object, long) */
! @ForceInline
! public byte getByte(Object o, long offset) {
! return theInternalUnsafe.getByte(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putByte(Object o, long offset, byte x) {
! theInternalUnsafe.putByte(o, offset, x);
! }
!
/** @see #getInt(Object, long) */
! @ForceInline
! public short getShort(Object o, long offset) {
! return theInternalUnsafe.getShort(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putShort(Object o, long offset, short x) {
! theInternalUnsafe.putShort(o, offset, x);
! }
!
/** @see #getInt(Object, long) */
! @ForceInline
! public char getChar(Object o, long offset) {
! return theInternalUnsafe.getChar(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putChar(Object o, long offset, char x) {
! theInternalUnsafe.putChar(o, offset, x);
! }
!
/** @see #getInt(Object, long) */
! @ForceInline
! public long getLong(Object o, long offset) {
! return theInternalUnsafe.getLong(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putLong(Object o, long offset, long x) {
! theInternalUnsafe.putLong(o, offset, x);
! }
!
/** @see #getInt(Object, long) */
! @ForceInline
! public float getFloat(Object o, long offset) {
! return theInternalUnsafe.getFloat(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putFloat(Object o, long offset, float x) {
! theInternalUnsafe.putFloat(o, offset, x);
! }
!
/** @see #getInt(Object, long) */
! @ForceInline
! public double getDouble(Object o, long offset) {
! return theInternalUnsafe.getDouble(o, offset);
! }
!
/** @see #putInt(Object, long, int) */
! @ForceInline
! public void putDouble(Object o, long offset, double x) {
! theInternalUnsafe.putDouble(o, offset, x);
! }
!
// These read VM internal data.
/**
* Fetches an uncompressed reference value from a given native variable
* ignoring the VM's compressed references mode.
*
* @param address a memory address locating the variable
* @return the value fetched from the indicated native variable
*/
! @ForceInline
! public Object getUncompressedObject(long address) {
! return theInternalUnsafe.getUncompressedObject(address);
! }
/**
* Fetches the {@link java.lang.Class} Java mirror for the given native
* metaspace {@code Klass} pointer.
*
* @param metaspaceKlass a native metaspace {@code Klass} pointer
* @return the {@link java.lang.Class} Java mirror
*/
! @ForceInline
! public Class<?> getJavaMirror(long metaspaceKlass) {
! return theInternalUnsafe.getJavaMirror(metaspaceKlass);
! }
/**
* Fetches a native metaspace {@code Klass} pointer for the given Java
* object.
*
* @param o Java heap object for which to fetch the class pointer
* @return a native metaspace {@code Klass} pointer
*/
! @ForceInline
! public long getKlassPointer(Object o) {
! return theInternalUnsafe.getKlassPointer(o);
! }
// These work on values in the C heap.
/**
* Fetches a value from a given memory address. If the address is zero, or
* does not point into a block obtained from {@link #allocateMemory}, the
* results are undefined.
*
* @see #allocateMemory
*/
! @ForceInline
! public byte getByte(long address) {
! return theInternalUnsafe.getByte(address);
! }
/**
* Stores a value into a given memory address. If the address is zero, or
* does not point into a block obtained from {@link #allocateMemory}, the
* results are undefined.
*
* @see #getByte(long)
*/
! @ForceInline
! public void putByte(long address, byte x) {
! theInternalUnsafe.putByte(address, x);
! }
/** @see #getByte(long) */
! @ForceInline
! public short getShort(long address) {
! return theInternalUnsafe.getShort(address);
! }
!
/** @see #putByte(long, byte) */
! @ForceInline
! public void putShort(long address, short x) {
! theInternalUnsafe.putShort(address, x);
! }
!
/** @see #getByte(long) */
! @ForceInline
! public char getChar(long address) {
! return theInternalUnsafe.getChar(address);
! }
!
/** @see #putByte(long, byte) */
! @ForceInline
! public void putChar(long address, char x) {
! theInternalUnsafe.putChar(address, x);
! }
!
/** @see #getByte(long) */
! @ForceInline
! public int getInt(long address) {
! return theInternalUnsafe.getInt(address);
! }
!
/** @see #putByte(long, byte) */
! @ForceInline
! public void putInt(long address, int x) {
! theInternalUnsafe.putInt(address, x);
! }
!
/** @see #getByte(long) */
! @ForceInline
! public long getLong(long address) {
! return theInternalUnsafe.getLong(address);
! }
!
/** @see #putByte(long, byte) */
! @ForceInline
! public void putLong(long address, long x) {
! theInternalUnsafe.putLong(address, x);
! }
!
/** @see #getByte(long) */
! @ForceInline
! public float getFloat(long address) {
! return theInternalUnsafe.getFloat(address);
! }
!
/** @see #putByte(long, byte) */
! @ForceInline
! public void putFloat(long address, float x) {
! theInternalUnsafe.putFloat(address, x);
! }
!
/** @see #getByte(long) */
! @ForceInline
! public double getDouble(long address) {
! return theInternalUnsafe.getDouble(address);
! }
!
/** @see #putByte(long, byte) */
! @ForceInline
! public void putDouble(long address, double x) {
! theInternalUnsafe.putDouble(address, x);
! }
!
/**
* Fetches a native pointer from a given memory address. If the address is
* zero, or does not point into a block obtained from {@link
* #allocateMemory}, the results are undefined.
*** 339,350 ****
* from the target address may be determined by consulting {@link
* #addressSize}.
*
* @see #allocateMemory
*/
! @HotSpotIntrinsicCandidate
! public native long getAddress(long address);
/**
* Stores a native pointer into a given memory address. If the address is
* zero, or does not point into a block obtained from {@link
* #allocateMemory}, the results are undefined.
--- 446,459 ----
* from the target address may be determined by consulting {@link
* #addressSize}.
*
* @see #allocateMemory
*/
! @ForceInline
! public long getAddress(long address) {
! return theInternalUnsafe.getAddress(address);
! }
/**
* Stores a native pointer into a given memory address. If the address is
* zero, or does not point into a block obtained from {@link
* #allocateMemory}, the results are undefined.
*** 352,382 ****
* <p>The number of bytes actually written at the target address may be
* determined by consulting {@link #addressSize}.
*
* @see #getAddress(long)
*/
! @HotSpotIntrinsicCandidate
! public native void putAddress(long address, long x);
/// wrappers for malloc, realloc, free:
/**
* Allocates a new block of native memory, of the given size in bytes. The
* contents of the memory are uninitialized; they will generally be
* garbage. The resulting native pointer will never be zero, and will be
* aligned for all value types. Dispose of this memory by calling {@link
* #freeMemory}, or resize it with {@link #reallocateMemory}.
*
! * @throws IllegalArgumentException if the size is negative or too large
* for the native size_t type
*
* @throws OutOfMemoryError if the allocation is refused by the system
*
* @see #getByte(long)
* @see #putByte(long, byte)
*/
! public native long allocateMemory(long bytes);
/**
* Resizes a new block of native memory, to the given size in bytes. The
* contents of the new block past the size of the old block are
* uninitialized; they will generally be garbage. The resulting native
--- 461,506 ----
* <p>The number of bytes actually written at the target address may be
* determined by consulting {@link #addressSize}.
*
* @see #getAddress(long)
*/
! @ForceInline
! public void putAddress(long address, long x) {
! theInternalUnsafe.putAddress(address, x);
! }
!
/// wrappers for malloc, realloc, free:
/**
* Allocates a new block of native memory, of the given size in bytes. The
* contents of the memory are uninitialized; they will generally be
* garbage. The resulting native pointer will never be zero, and will be
* aligned for all value types. Dispose of this memory by calling {@link
* #freeMemory}, or resize it with {@link #reallocateMemory}.
*
! * <em>Note:</em> It is the resposibility of the caller to make
! * sure arguments are checked before the methods are called. While
! * some rudimentary checks are performed on the input, the checks
! * are best effort and when performance is an overriding priority,
! * as when methods of this class are optimized by the runtime
! * compiler, some or all checks (if any) may be elided. Hence, the
! * caller must not rely on the checks and corresponding
! * exceptions!
! *
! * @throws RuntimeException if the size is negative or too large
* for the native size_t type
*
* @throws OutOfMemoryError if the allocation is refused by the system
*
* @see #getByte(long)
* @see #putByte(long, byte)
*/
! @ForceInline
! public long allocateMemory(long bytes) {
! return theInternalUnsafe.allocateMemory(bytes);
! }
/**
* Resizes a new block of native memory, to the given size in bytes. The
* contents of the new block past the size of the old block are
* uninitialized; they will generally be garbage. The resulting native
*** 384,401 ****
* resulting native pointer will be aligned for all value types. Dispose
* of this memory by calling {@link #freeMemory}, or resize it with {@link
* #reallocateMemory}. The address passed to this method may be null, in
* which case an allocation will be performed.
*
! * @throws IllegalArgumentException if the size is negative or too large
* for the native size_t type
*
* @throws OutOfMemoryError if the allocation is refused by the system
*
* @see #allocateMemory
*/
! public native long reallocateMemory(long address, long bytes);
/**
* Sets all bytes in a given block of memory to a fixed value
* (usually zero).
*
--- 508,537 ----
* resulting native pointer will be aligned for all value types. Dispose
* of this memory by calling {@link #freeMemory}, or resize it with {@link
* #reallocateMemory}. The address passed to this method may be null, in
* which case an allocation will be performed.
*
! * <em>Note:</em> It is the resposibility of the caller to make
! * sure arguments are checked before the methods are called. While
! * some rudimentary checks are performed on the input, the checks
! * are best effort and when performance is an overriding priority,
! * as when methods of this class are optimized by the runtime
! * compiler, some or all checks (if any) may be elided. Hence, the
! * caller must not rely on the checks and corresponding
! * exceptions!
! *
! * @throws RuntimeException if the size is negative or too large
* for the native size_t type
*
* @throws OutOfMemoryError if the allocation is refused by the system
*
* @see #allocateMemory
*/
! @ForceInline
! public long reallocateMemory(long address, long bytes) {
! return theInternalUnsafe.reallocateMemory(address, bytes);
! }
/**
* Sets all bytes in a given block of memory to a fixed value
* (usually zero).
*
*** 408,430 ****
* by the address and length parameters. If the effective address and
* length are all even modulo 8, the stores take place in 'long' units.
* If the effective address and length are (resp.) even modulo 4 or 2,
* the stores take place in units of 'int' or 'short'.
*
* @since 1.7
*/
! public native void setMemory(Object o, long offset, long bytes, byte value);
/**
* Sets all bytes in a given block of memory to a fixed value
* (usually zero). This provides a <em>single-register</em> addressing mode,
* as discussed in {@link #getInt(Object,long)}.
*
* <p>Equivalent to {@code setMemory(null, address, bytes, value)}.
*/
public void setMemory(long address, long bytes, byte value) {
! setMemory(null, address, bytes, value);
}
/**
* Sets all bytes in a given block of memory to a copy of another
* block.
--- 544,581 ----
* by the address and length parameters. If the effective address and
* length are all even modulo 8, the stores take place in 'long' units.
* If the effective address and length are (resp.) even modulo 4 or 2,
* the stores take place in units of 'int' or 'short'.
*
+ * <em>Note:</em> It is the resposibility of the caller to make
+ * sure arguments are checked before the methods are called. While
+ * some rudimentary checks are performed on the input, the checks
+ * are best effort and when performance is an overriding priority,
+ * as when methods of this class are optimized by the runtime
+ * compiler, some or all checks (if any) may be elided. Hence, the
+ * caller must not rely on the checks and corresponding
+ * exceptions!
+ *
+ * @throws RuntimeException if any of the arguments is invalid
+ *
* @since 1.7
*/
! @ForceInline
! public void setMemory(Object o, long offset, long bytes, byte value) {
! theInternalUnsafe.setMemory(o, offset, bytes, value);
! }
/**
* Sets all bytes in a given block of memory to a fixed value
* (usually zero). This provides a <em>single-register</em> addressing mode,
* as discussed in {@link #getInt(Object,long)}.
*
* <p>Equivalent to {@code setMemory(null, address, bytes, value)}.
*/
+ @ForceInline
public void setMemory(long address, long bytes, byte value) {
! theInternalUnsafe.setMemory(address, bytes, value);
}
/**
* Sets all bytes in a given block of memory to a copy of another
* block.
*** 438,481 ****
* by the address and length parameters. If the effective addresses and
* length are all even modulo 8, the transfer takes place in 'long' units.
* If the effective addresses and length are (resp.) even modulo 4 or 2,
* the transfer takes place in units of 'int' or 'short'.
*
* @since 1.7
*/
! @HotSpotIntrinsicCandidate
! public native void copyMemory(Object srcBase, long srcOffset,
Object destBase, long destOffset,
! long bytes);
/**
* Sets all bytes in a given block of memory to a copy of another
* block. This provides a <em>single-register</em> addressing mode,
* as discussed in {@link #getInt(Object,long)}.
*
* Equivalent to {@code copyMemory(null, srcAddress, null, destAddress, bytes)}.
*/
public void copyMemory(long srcAddress, long destAddress, long bytes) {
! copyMemory(null, srcAddress, null, destAddress, bytes);
}
/**
* Disposes of a block of native memory, as obtained from {@link
* #allocateMemory} or {@link #reallocateMemory}. The address passed to
* this method may be null, in which case no action is taken.
*
* @see #allocateMemory
*/
! public native void freeMemory(long address);
/// random queries
/**
* This constant differs from all results that will ever be returned from
* {@link #staticFieldOffset}, {@link #objectFieldOffset},
* or {@link #arrayBaseOffset}.
*/
! public static final int INVALID_FIELD_OFFSET = -1;
/**
* Reports the location of a given field in the storage allocation of its
* class. Do not expect to perform any sort of arithmetic on this offset;
* it is just a cookie which is passed to the unsafe heap memory accessors.
--- 589,661 ----
* by the address and length parameters. If the effective addresses and
* length are all even modulo 8, the transfer takes place in 'long' units.
* If the effective addresses and length are (resp.) even modulo 4 or 2,
* the transfer takes place in units of 'int' or 'short'.
*
+ * <em>Note:</em> It is the resposibility of the caller to make
+ * sure arguments are checked before the methods are called. While
+ * some rudimentary checks are performed on the input, the checks
+ * are best effort and when performance is an overriding priority,
+ * as when methods of this class are optimized by the runtime
+ * compiler, some or all checks (if any) may be elided. Hence, the
+ * caller must not rely on the checks and corresponding
+ * exceptions!
+ *
+ * @throws RuntimeException if any of the arguments is invalid
+ *
* @since 1.7
*/
! @ForceInline
! public void copyMemory(Object srcBase, long srcOffset,
Object destBase, long destOffset,
! long bytes) {
! theInternalUnsafe.copyMemory(srcBase, srcOffset, destBase, destOffset, bytes);
! }
!
/**
* Sets all bytes in a given block of memory to a copy of another
* block. This provides a <em>single-register</em> addressing mode,
* as discussed in {@link #getInt(Object,long)}.
*
* Equivalent to {@code copyMemory(null, srcAddress, null, destAddress, bytes)}.
*/
+ @ForceInline
public void copyMemory(long srcAddress, long destAddress, long bytes) {
! theInternalUnsafe.copyMemory(srcAddress, destAddress, bytes);
}
/**
* Disposes of a block of native memory, as obtained from {@link
* #allocateMemory} or {@link #reallocateMemory}. The address passed to
* this method may be null, in which case no action is taken.
*
+ * <em>Note:</em> It is the resposibility of the caller to make
+ * sure arguments are checked before the methods are called. While
+ * some rudimentary checks are performed on the input, the checks
+ * are best effort and when performance is an overriding priority,
+ * as when methods of this class are optimized by the runtime
+ * compiler, some or all checks (if any) may be elided. Hence, the
+ * caller must not rely on the checks and corresponding
+ * exceptions!
+ *
+ * @throws RuntimeException if any of the arguments is invalid
+ *
* @see #allocateMemory
*/
! @ForceInline
! public void freeMemory(long address) {
! theInternalUnsafe.freeMemory(address);
! }
/// random queries
/**
* This constant differs from all results that will ever be returned from
* {@link #staticFieldOffset}, {@link #objectFieldOffset},
* or {@link #arrayBaseOffset}.
*/
! public static final int INVALID_FIELD_OFFSET = jdk.internal.misc.Unsafe.INVALID_FIELD_OFFSET;
/**
* Reports the location of a given field in the storage allocation of its
* class. Do not expect to perform any sort of arithmetic on this offset;
* it is just a cookie which is passed to the unsafe heap memory accessors.
*** 491,501 ****
* 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.
* @see #getInt(Object, long)
*/
! public native long objectFieldOffset(Field f);
/**
* Reports the location of a given static field, in conjunction with {@link
* #staticFieldBase}.
* <p>Do not expect to perform any sort of arithmetic on this offset;
--- 671,684 ----
* 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.
* @see #getInt(Object, long)
*/
! @ForceInline
! public long objectFieldOffset(Field f) {
! return theInternalUnsafe.objectFieldOffset(f);
! }
/**
* Reports the location of a given static field, in conjunction with {@link
* #staticFieldBase}.
* <p>Do not expect to perform any sort of arithmetic on this offset;
*** 510,520 ****
* 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.
* @see #getInt(Object, long)
*/
! public native long staticFieldOffset(Field f);
/**
* Reports the location of a given static field, in conjunction with {@link
* #staticFieldOffset}.
* <p>Fetch the base "Object", if any, with which static fields of the
--- 693,706 ----
* 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.
* @see #getInt(Object, long)
*/
! @ForceInline
! public long staticFieldOffset(Field f) {
! return theInternalUnsafe.staticFieldOffset(f);
! }
/**
* Reports the location of a given static field, in conjunction with {@link
* #staticFieldOffset}.
* <p>Fetch the base "Object", if any, with which static fields of the
*** 522,547 ****
* long)}. This value may be null. This value may refer to an object
* 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.
*/
! public native Object staticFieldBase(Field f);
/**
* Detects if the given class may need to be initialized. This is often
* needed in conjunction with obtaining the static field base of a
* class.
* @return false only if a call to {@code ensureClassInitialized} would have no effect
*/
! public native boolean shouldBeInitialized(Class<?> c);
/**
* Ensures the given class has been initialized. This is often
* needed in conjunction with obtaining the static field base of a
* class.
*/
! public native void ensureClassInitialized(Class<?> c);
/**
* Reports the offset of the first element in the storage allocation of a
* given array class. If {@link #arrayIndexScale} returns a non-zero value
* for the same class, you may use that scale factor, together with this
--- 708,742 ----
* long)}. This value may be null. This value may refer to an object
* 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.
*/
! @ForceInline
! public Object staticFieldBase(Field f) {
! return theInternalUnsafe.staticFieldBase(f);
! }
/**
* Detects if the given class may need to be initialized. This is often
* needed in conjunction with obtaining the static field base of a
* class.
* @return false only if a call to {@code ensureClassInitialized} would have no effect
*/
! @ForceInline
! public boolean shouldBeInitialized(Class<?> c) {
! return theInternalUnsafe.shouldBeInitialized(c);
! }
/**
* Ensures the given class has been initialized. This is often
* needed in conjunction with obtaining the static field base of a
* class.
*/
! @ForceInline
! public void ensureClassInitialized(Class<?> c) {
! theInternalUnsafe.ensureClassInitialized(c);
! }
/**
* Reports the offset of the first element in the storage allocation of a
* given array class. If {@link #arrayIndexScale} returns a non-zero value
* for the same class, you may use that scale factor, together with this
*** 549,595 ****
* given class.
*
* @see #getInt(Object, long)
* @see #putInt(Object, long, int)
*/
! public native int arrayBaseOffset(Class<?> arrayClass);
/** The value of {@code arrayBaseOffset(boolean[].class)} */
! public static final int ARRAY_BOOLEAN_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(boolean[].class);
/** The value of {@code arrayBaseOffset(byte[].class)} */
! public static final int ARRAY_BYTE_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(byte[].class);
/** The value of {@code arrayBaseOffset(short[].class)} */
! public static final int ARRAY_SHORT_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(short[].class);
/** The value of {@code arrayBaseOffset(char[].class)} */
! public static final int ARRAY_CHAR_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(char[].class);
/** The value of {@code arrayBaseOffset(int[].class)} */
! public static final int ARRAY_INT_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(int[].class);
/** The value of {@code arrayBaseOffset(long[].class)} */
! public static final int ARRAY_LONG_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(long[].class);
/** The value of {@code arrayBaseOffset(float[].class)} */
! public static final int ARRAY_FLOAT_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(float[].class);
/** The value of {@code arrayBaseOffset(double[].class)} */
! public static final int ARRAY_DOUBLE_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(double[].class);
/** The value of {@code arrayBaseOffset(Object[].class)} */
! public static final int ARRAY_OBJECT_BASE_OFFSET
! = theUnsafe.arrayBaseOffset(Object[].class);
/**
* Reports the scale factor for addressing elements in the storage
* allocation of a given array class. However, arrays of "narrow" types
* will generally not work properly with accessors like {@link
--- 744,784 ----
* given class.
*
* @see #getInt(Object, long)
* @see #putInt(Object, long, int)
*/
! @ForceInline
! public int arrayBaseOffset(Class<?> arrayClass) {
! return theInternalUnsafe.arrayBaseOffset(arrayClass);
! }
/** The value of {@code arrayBaseOffset(boolean[].class)} */
! public static final int ARRAY_BOOLEAN_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_BOOLEAN_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(byte[].class)} */
! public static final int ARRAY_BYTE_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_BYTE_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(short[].class)} */
! public static final int ARRAY_SHORT_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_SHORT_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(char[].class)} */
! public static final int ARRAY_CHAR_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_CHAR_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(int[].class)} */
! public static final int ARRAY_INT_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_INT_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(long[].class)} */
! public static final int ARRAY_LONG_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_LONG_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(float[].class)} */
! public static final int ARRAY_FLOAT_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_FLOAT_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(double[].class)} */
! public static final int ARRAY_DOUBLE_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_DOUBLE_BASE_OFFSET;
/** The value of {@code arrayBaseOffset(Object[].class)} */
! public static final int ARRAY_OBJECT_BASE_OFFSET = jdk.internal.misc.Unsafe.ARRAY_OBJECT_BASE_OFFSET;
/**
* Reports the scale factor for addressing elements in the storage
* allocation of a given array class. However, arrays of "narrow" types
* will generally not work properly with accessors like {@link
*** 598,672 ****
*
* @see #arrayBaseOffset
* @see #getInt(Object, long)
* @see #putInt(Object, long, int)
*/
! public native int arrayIndexScale(Class<?> arrayClass);
/** The value of {@code arrayIndexScale(boolean[].class)} */
! public static final int ARRAY_BOOLEAN_INDEX_SCALE
! = theUnsafe.arrayIndexScale(boolean[].class);
/** The value of {@code arrayIndexScale(byte[].class)} */
! public static final int ARRAY_BYTE_INDEX_SCALE
! = theUnsafe.arrayIndexScale(byte[].class);
/** The value of {@code arrayIndexScale(short[].class)} */
! public static final int ARRAY_SHORT_INDEX_SCALE
! = theUnsafe.arrayIndexScale(short[].class);
/** The value of {@code arrayIndexScale(char[].class)} */
! public static final int ARRAY_CHAR_INDEX_SCALE
! = theUnsafe.arrayIndexScale(char[].class);
/** The value of {@code arrayIndexScale(int[].class)} */
! public static final int ARRAY_INT_INDEX_SCALE
! = theUnsafe.arrayIndexScale(int[].class);
/** The value of {@code arrayIndexScale(long[].class)} */
! public static final int ARRAY_LONG_INDEX_SCALE
! = theUnsafe.arrayIndexScale(long[].class);
/** The value of {@code arrayIndexScale(float[].class)} */
! public static final int ARRAY_FLOAT_INDEX_SCALE
! = theUnsafe.arrayIndexScale(float[].class);
/** The value of {@code arrayIndexScale(double[].class)} */
! public static final int ARRAY_DOUBLE_INDEX_SCALE
! = theUnsafe.arrayIndexScale(double[].class);
/** The value of {@code arrayIndexScale(Object[].class)} */
! public static final int ARRAY_OBJECT_INDEX_SCALE
! = theUnsafe.arrayIndexScale(Object[].class);
/**
* Reports the size in bytes of a native pointer, as stored via {@link
* #putAddress}. This value will be either 4 or 8. Note that the sizes of
* other primitive types (as stored in native memory blocks) is determined
* fully by their information content.
*/
! public native int addressSize();
/** The value of {@code addressSize()} */
! public static final int ADDRESS_SIZE = theUnsafe.addressSize();
/**
* Reports the size in bytes of a native memory page (whatever that is).
* This value will always be a power of two.
*/
! public native int pageSize();
/// random trusted operations from JNI:
/**
* Tells the VM to define a class, without security checks. By default, the
* class loader and protection domain come from the caller's class.
*/
! public native Class<?> defineClass(String name, byte[] b, int off, int len,
ClassLoader loader,
! ProtectionDomain protectionDomain);
/**
* Defines a class but does not make it known to the class loader or system dictionary.
* <p>
* For each CP entry, the corresponding CP patch must either be null or have
--- 787,864 ----
*
* @see #arrayBaseOffset
* @see #getInt(Object, long)
* @see #putInt(Object, long, int)
*/
! @ForceInline
! public int arrayIndexScale(Class<?> arrayClass) {
! return theInternalUnsafe.arrayIndexScale(arrayClass);
! }
/** The value of {@code arrayIndexScale(boolean[].class)} */
! public static final int ARRAY_BOOLEAN_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_BOOLEAN_INDEX_SCALE;
/** The value of {@code arrayIndexScale(byte[].class)} */
! public static final int ARRAY_BYTE_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_BYTE_INDEX_SCALE;
/** The value of {@code arrayIndexScale(short[].class)} */
! public static final int ARRAY_SHORT_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_SHORT_INDEX_SCALE;
/** The value of {@code arrayIndexScale(char[].class)} */
! public static final int ARRAY_CHAR_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_CHAR_INDEX_SCALE;
/** The value of {@code arrayIndexScale(int[].class)} */
! public static final int ARRAY_INT_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_INT_INDEX_SCALE;
/** The value of {@code arrayIndexScale(long[].class)} */
! public static final int ARRAY_LONG_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_LONG_INDEX_SCALE;
/** The value of {@code arrayIndexScale(float[].class)} */
! public static final int ARRAY_FLOAT_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_FLOAT_INDEX_SCALE;
/** The value of {@code arrayIndexScale(double[].class)} */
! public static final int ARRAY_DOUBLE_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_DOUBLE_INDEX_SCALE;
/** The value of {@code arrayIndexScale(Object[].class)} */
! public static final int ARRAY_OBJECT_INDEX_SCALE = jdk.internal.misc.Unsafe.ARRAY_OBJECT_INDEX_SCALE;
/**
* Reports the size in bytes of a native pointer, as stored via {@link
* #putAddress}. This value will be either 4 or 8. Note that the sizes of
* other primitive types (as stored in native memory blocks) is determined
* fully by their information content.
*/
! @ForceInline
! public int addressSize() {
! return theInternalUnsafe.addressSize();
! }
/** The value of {@code addressSize()} */
! public static final int ADDRESS_SIZE = theInternalUnsafe.addressSize();
/**
* Reports the size in bytes of a native memory page (whatever that is).
* This value will always be a power of two.
*/
! @ForceInline
! public int pageSize() {
! return theInternalUnsafe.pageSize();
! }
/// random trusted operations from JNI:
/**
* Tells the VM to define a class, without security checks. By default, the
* class loader and protection domain come from the caller's class.
*/
! @ForceInline
! public Class<?> defineClass(String name, byte[] b, int off, int len,
ClassLoader loader,
! ProtectionDomain protectionDomain) {
! return theInternalUnsafe.defineClass(name, b, off, len, loader, protectionDomain);
! }
/**
* Defines a class but does not make it known to the class loader or system dictionary.
* <p>
* For each CP entry, the corresponding CP patch must either be null or have
*** 680,841 ****
* </ul>
* @param hostClass context for linkage, access control, protection domain, and class loader
* @param data bytes of a class file
* @param cpPatches where non-null entries exist, they replace corresponding CP entries in data
*/
! public native Class<?> defineAnonymousClass(Class<?> hostClass, byte[] data, Object[] cpPatches);
/**
* Allocates an instance but does not run any constructor.
* Initializes the class if it has not yet been.
*/
! @HotSpotIntrinsicCandidate
! public native Object allocateInstance(Class<?> cls)
! throws InstantiationException;
/** Throws the exception without telling the verifier. */
! public native void throwException(Throwable ee);
/**
* Atomically updates Java variable to {@code x} if it is currently
* holding {@code expected}.
*
* <p>This operation has memory semantics of a {@code volatile} read
* and write. Corresponds to C11 atomic_compare_exchange_strong.
*
* @return {@code true} if successful
*/
! @HotSpotIntrinsicCandidate
! public final native boolean compareAndSwapObject(Object o, long offset,
Object expected,
! Object x);
/**
* Atomically updates Java variable to {@code x} if it is currently
* holding {@code expected}.
*
* <p>This operation has memory semantics of a {@code volatile} read
* and write. Corresponds to C11 atomic_compare_exchange_strong.
*
* @return {@code true} if successful
*/
! @HotSpotIntrinsicCandidate
! public final native boolean compareAndSwapInt(Object o, long offset,
int expected,
! int x);
/**
* Atomically updates Java variable to {@code x} if it is currently
* holding {@code expected}.
*
* <p>This operation has memory semantics of a {@code volatile} read
* and write. Corresponds to C11 atomic_compare_exchange_strong.
*
* @return {@code true} if successful
*/
! @HotSpotIntrinsicCandidate
! public final native boolean compareAndSwapLong(Object o, long offset,
long expected,
! long x);
/**
* Fetches a reference value from a given Java variable, with volatile
* load semantics. Otherwise identical to {@link #getObject(Object, long)}
*/
! @HotSpotIntrinsicCandidate
! public native Object getObjectVolatile(Object o, long offset);
/**
* Stores a reference value into a given Java variable, with
* volatile store semantics. Otherwise identical to {@link #putObject(Object, long, Object)}
*/
! @HotSpotIntrinsicCandidate
! public native void putObjectVolatile(Object o, long offset, Object x);
/** Volatile version of {@link #getInt(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native int getIntVolatile(Object o, long offset);
/** Volatile version of {@link #putInt(Object, long, int)} */
! @HotSpotIntrinsicCandidate
! public native void putIntVolatile(Object o, long offset, int x);
/** Volatile version of {@link #getBoolean(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native boolean getBooleanVolatile(Object o, long offset);
/** Volatile version of {@link #putBoolean(Object, long, boolean)} */
! @HotSpotIntrinsicCandidate
! public native void putBooleanVolatile(Object o, long offset, boolean x);
/** Volatile version of {@link #getByte(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native byte getByteVolatile(Object o, long offset);
/** Volatile version of {@link #putByte(Object, long, byte)} */
! @HotSpotIntrinsicCandidate
! public native void putByteVolatile(Object o, long offset, byte x);
/** Volatile version of {@link #getShort(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native short getShortVolatile(Object o, long offset);
/** Volatile version of {@link #putShort(Object, long, short)} */
! @HotSpotIntrinsicCandidate
! public native void putShortVolatile(Object o, long offset, short x);
/** Volatile version of {@link #getChar(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native char getCharVolatile(Object o, long offset);
/** Volatile version of {@link #putChar(Object, long, char)} */
! @HotSpotIntrinsicCandidate
! public native void putCharVolatile(Object o, long offset, char x);
/** Volatile version of {@link #getLong(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native long getLongVolatile(Object o, long offset);
/** Volatile version of {@link #putLong(Object, long, long)} */
! @HotSpotIntrinsicCandidate
! public native void putLongVolatile(Object o, long offset, long x);
/** Volatile version of {@link #getFloat(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native float getFloatVolatile(Object o, long offset);
/** Volatile version of {@link #putFloat(Object, long, float)} */
! @HotSpotIntrinsicCandidate
! public native void putFloatVolatile(Object o, long offset, float x);
/** Volatile version of {@link #getDouble(Object, long)} */
! @HotSpotIntrinsicCandidate
! public native double getDoubleVolatile(Object o, long offset);
/** Volatile version of {@link #putDouble(Object, long, double)} */
! @HotSpotIntrinsicCandidate
! public native void putDoubleVolatile(Object o, long offset, double x);
/**
* Version of {@link #putObjectVolatile(Object, long, Object)}
* that does not guarantee immediate visibility of the store to
* other threads. This method is generally only useful if the
* underlying field is a Java volatile (or if an array cell, one
* that is otherwise only accessed using volatile accesses).
*
* Corresponds to C11 atomic_store_explicit(..., memory_order_release).
*/
! @HotSpotIntrinsicCandidate
! public native void putOrderedObject(Object o, long offset, Object x);
/** Ordered/Lazy version of {@link #putIntVolatile(Object, long, int)} */
! @HotSpotIntrinsicCandidate
! public native void putOrderedInt(Object o, long offset, int x);
/** Ordered/Lazy version of {@link #putLongVolatile(Object, long, long)} */
! @HotSpotIntrinsicCandidate
! public native void putOrderedLong(Object o, long offset, long x);
/**
* Unblocks the given thread blocked on {@code park}, or, if it is
* not blocked, causes the subsequent call to {@code park} not to
* block. Note: this operation is "unsafe" solely because the
--- 872,1089 ----
* </ul>
* @param hostClass context for linkage, access control, protection domain, and class loader
* @param data bytes of a class file
* @param cpPatches where non-null entries exist, they replace corresponding CP entries in data
*/
! @ForceInline
! public Class<?> defineAnonymousClass(Class<?> hostClass, byte[] data, Object[] cpPatches) {
! return theInternalUnsafe.defineAnonymousClass(hostClass, data, cpPatches);
! }
/**
* Allocates an instance but does not run any constructor.
* Initializes the class if it has not yet been.
*/
! @ForceInline
! public Object allocateInstance(Class<?> cls)
! throws InstantiationException {
! return theInternalUnsafe.allocateInstance(cls);
! }
/** Throws the exception without telling the verifier. */
! @ForceInline
! public void throwException(Throwable ee) {
! theInternalUnsafe.throwException(ee);
! }
/**
* Atomically updates Java variable to {@code x} if it is currently
* holding {@code expected}.
*
* <p>This operation has memory semantics of a {@code volatile} read
* and write. Corresponds to C11 atomic_compare_exchange_strong.
*
* @return {@code true} if successful
*/
! @ForceInline
! public final boolean compareAndSwapObject(Object o, long offset,
Object expected,
! Object x) {
! return theInternalUnsafe.compareAndSwapObject(o, offset, expected, x);
! }
/**
* Atomically updates Java variable to {@code x} if it is currently
* holding {@code expected}.
*
* <p>This operation has memory semantics of a {@code volatile} read
* and write. Corresponds to C11 atomic_compare_exchange_strong.
*
* @return {@code true} if successful
*/
! @ForceInline
! public final boolean compareAndSwapInt(Object o, long offset,
int expected,
! int x) {
! return theInternalUnsafe.compareAndSwapInt(o, offset, expected, x);
! }
/**
* Atomically updates Java variable to {@code x} if it is currently
* holding {@code expected}.
*
* <p>This operation has memory semantics of a {@code volatile} read
* and write. Corresponds to C11 atomic_compare_exchange_strong.
*
* @return {@code true} if successful
*/
! @ForceInline
! public final boolean compareAndSwapLong(Object o, long offset,
long expected,
! long x) {
! return theInternalUnsafe.compareAndSwapLong(o, offset, expected, x);
! }
/**
* Fetches a reference value from a given Java variable, with volatile
* load semantics. Otherwise identical to {@link #getObject(Object, long)}
*/
! @ForceInline
! public Object getObjectVolatile(Object o, long offset) {
! return theInternalUnsafe.getObjectVolatile(o, offset);
! }
/**
* Stores a reference value into a given Java variable, with
* volatile store semantics. Otherwise identical to {@link #putObject(Object, long, Object)}
*/
! @ForceInline
! public void putObjectVolatile(Object o, long offset, Object x) {
! theInternalUnsafe.putObjectVolatile(o, offset, x);
! }
/** Volatile version of {@link #getInt(Object, long)} */
! @ForceInline
! public int getIntVolatile(Object o, long offset) {
! return theInternalUnsafe.getIntVolatile(o, offset);
! }
/** Volatile version of {@link #putInt(Object, long, int)} */
! @ForceInline
! public void putIntVolatile(Object o, long offset, int x) {
! theInternalUnsafe.putIntVolatile(o, offset, x);
! }
/** Volatile version of {@link #getBoolean(Object, long)} */
! @ForceInline
! public boolean getBooleanVolatile(Object o, long offset) {
! return theInternalUnsafe.getBooleanVolatile(o, offset);
! }
/** Volatile version of {@link #putBoolean(Object, long, boolean)} */
! @ForceInline
! public void putBooleanVolatile(Object o, long offset, boolean x) {
! theInternalUnsafe.putBooleanVolatile(o, offset, x);
! }
/** Volatile version of {@link #getByte(Object, long)} */
! @ForceInline
! public byte getByteVolatile(Object o, long offset) {
! return theInternalUnsafe.getByteVolatile(o, offset);
! }
/** Volatile version of {@link #putByte(Object, long, byte)} */
! @ForceInline
! public void putByteVolatile(Object o, long offset, byte x) {
! theInternalUnsafe.putByteVolatile(o, offset, x);
! }
/** Volatile version of {@link #getShort(Object, long)} */
! @ForceInline
! public short getShortVolatile(Object o, long offset) {
! return theInternalUnsafe.getShortVolatile(o, offset);
! }
/** Volatile version of {@link #putShort(Object, long, short)} */
! @ForceInline
! public void putShortVolatile(Object o, long offset, short x) {
! theInternalUnsafe.putShortVolatile(o, offset, x);
! }
/** Volatile version of {@link #getChar(Object, long)} */
! @ForceInline
! public char getCharVolatile(Object o, long offset) {
! return theInternalUnsafe.getCharVolatile(o, offset);
! }
/** Volatile version of {@link #putChar(Object, long, char)} */
! @ForceInline
! public void putCharVolatile(Object o, long offset, char x) {
! theInternalUnsafe.putCharVolatile(o, offset, x);
! }
/** Volatile version of {@link #getLong(Object, long)} */
! @ForceInline
! public long getLongVolatile(Object o, long offset) {
! return theInternalUnsafe.getLongVolatile(o, offset);
! }
/** Volatile version of {@link #putLong(Object, long, long)} */
! @ForceInline
! public void putLongVolatile(Object o, long offset, long x) {
! theInternalUnsafe.putLongVolatile(o, offset, x);
! }
/** Volatile version of {@link #getFloat(Object, long)} */
! @ForceInline
! public float getFloatVolatile(Object o, long offset) {
! return theInternalUnsafe.getFloatVolatile(o, offset);
! }
/** Volatile version of {@link #putFloat(Object, long, float)} */
! @ForceInline
! public void putFloatVolatile(Object o, long offset, float x) {
! theInternalUnsafe.putFloatVolatile(o, offset, x);
! }
/** Volatile version of {@link #getDouble(Object, long)} */
! @ForceInline
! public double getDoubleVolatile(Object o, long offset) {
! return theInternalUnsafe.getDoubleVolatile(o, offset);
! }
/** Volatile version of {@link #putDouble(Object, long, double)} */
! @ForceInline
! public void putDoubleVolatile(Object o, long offset, double x) {
! theInternalUnsafe.putDoubleVolatile(o, offset, x);
! }
/**
* Version of {@link #putObjectVolatile(Object, long, Object)}
* that does not guarantee immediate visibility of the store to
* other threads. This method is generally only useful if the
* underlying field is a Java volatile (or if an array cell, one
* that is otherwise only accessed using volatile accesses).
*
* Corresponds to C11 atomic_store_explicit(..., memory_order_release).
*/
! @ForceInline
! public void putOrderedObject(Object o, long offset, Object x) {
! theInternalUnsafe.putOrderedObject(o, offset, x);
! }
/** Ordered/Lazy version of {@link #putIntVolatile(Object, long, int)} */
! @ForceInline
! public void putOrderedInt(Object o, long offset, int x) {
! theInternalUnsafe.putOrderedInt(o, offset, x);
! }
/** Ordered/Lazy version of {@link #putLongVolatile(Object, long, long)} */
! @ForceInline
! public void putOrderedLong(Object o, long offset, long x) {
! theInternalUnsafe.putOrderedLong(o, offset, x);
! }
/**
* Unblocks the given thread blocked on {@code park}, or, if it is
* not blocked, causes the subsequent call to {@code park} not to
* block. Note: this operation is "unsafe" solely because the
*** 845,856 ****
* reference to the thread) but this is not nearly-automatically
* so when calling from native code.
*
* @param thread the thread to unpark.
*/
! @HotSpotIntrinsicCandidate
! public native void unpark(Object thread);
/**
* Blocks current thread, returning when a balancing
* {@code unpark} occurs, or a balancing {@code unpark} has
* already occurred, or the thread is interrupted, or, if not
--- 1093,1106 ----
* reference to the thread) but this is not nearly-automatically
* so when calling from native code.
*
* @param thread the thread to unpark.
*/
! @ForceInline
! public void unpark(Object thread) {
! theInternalUnsafe.unpark(thread);
! }
/**
* Blocks current thread, returning when a balancing
* {@code unpark} occurs, or a balancing {@code unpark} has
* already occurred, or the thread is interrupted, or, if not
*** 859,870 ****
* since Epoch has passed, or spuriously (i.e., returning for no
* "reason"). Note: This operation is in the Unsafe class only
* because {@code unpark} is, so it would be strange to place it
* elsewhere.
*/
! @HotSpotIntrinsicCandidate
! public native void park(boolean isAbsolute, long time);
/**
* Gets the load average in the system run queue assigned
* to the available processors averaged over various periods of time.
* This method retrieves the given {@code nelem} samples and
--- 1109,1122 ----
* since Epoch has passed, or spuriously (i.e., returning for no
* "reason"). Note: This operation is in the Unsafe class only
* because {@code unpark} is, so it would be strange to place it
* elsewhere.
*/
! @ForceInline
! public void park(boolean isAbsolute, long time) {
! theInternalUnsafe.park(isAbsolute, time);
! }
/**
* Gets the load average in the system run queue assigned
* to the available processors averaged over various periods of time.
* This method retrieves the given {@code nelem} samples and
*** 877,887 ****
* must be 1 to 3.
*
* @return the number of samples actually retrieved; or -1
* if the load average is unobtainable.
*/
! public native int getLoadAverage(double[] loadavg, int nelems);
// The following contain CAS-based Java implementations used on
// platforms not supporting native instructions
/**
--- 1129,1142 ----
* must be 1 to 3.
*
* @return the number of samples actually retrieved; or -1
* if the load average is unobtainable.
*/
! @ForceInline
! public int getLoadAverage(double[] loadavg, int nelems) {
! return theInternalUnsafe.getLoadAverage(loadavg, nelems);
! }
// The following contain CAS-based Java implementations used on
// platforms not supporting native instructions
/**
*** 893,909 ****
* @param offset field/element offset
* @param delta the value to add
* @return the previous value
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
public final int getAndAddInt(Object o, long offset, int delta) {
! int v;
! do {
! v = getIntVolatile(o, offset);
! } while (!compareAndSwapInt(o, offset, v, v + delta));
! return v;
}
/**
* Atomically adds the given value to the current value of a field
* or array element within the given object {@code o}
--- 1148,1160 ----
* @param offset field/element offset
* @param delta the value to add
* @return the previous value
* @since 1.8
*/
! @ForceInline
public final int getAndAddInt(Object o, long offset, int delta) {
! return theInternalUnsafe.getAndAddInt(o, offset, delta);
}
/**
* Atomically adds the given value to the current value of a field
* or array element within the given object {@code o}
*** 913,929 ****
* @param offset field/element offset
* @param delta the value to add
* @return the previous value
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
public final long getAndAddLong(Object o, long offset, long delta) {
! long v;
! do {
! v = getLongVolatile(o, offset);
! } while (!compareAndSwapLong(o, offset, v, v + delta));
! return v;
}
/**
* Atomically exchanges the given value with the current value of
* a field or array element within the given object {@code o}
--- 1164,1176 ----
* @param offset field/element offset
* @param delta the value to add
* @return the previous value
* @since 1.8
*/
! @ForceInline
public final long getAndAddLong(Object o, long offset, long delta) {
! return theInternalUnsafe.getAndAddLong(o, offset, delta);
}
/**
* Atomically exchanges the given value with the current value of
* a field or array element within the given object {@code o}
*** 933,949 ****
* @param offset field/element offset
* @param newValue new value
* @return the previous value
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
public final int getAndSetInt(Object o, long offset, int newValue) {
! int v;
! do {
! v = getIntVolatile(o, offset);
! } while (!compareAndSwapInt(o, offset, v, newValue));
! return v;
}
/**
* Atomically exchanges the given value with the current value of
* a field or array element within the given object {@code o}
--- 1180,1192 ----
* @param offset field/element offset
* @param newValue new value
* @return the previous value
* @since 1.8
*/
! @ForceInline
public final int getAndSetInt(Object o, long offset, int newValue) {
! return theInternalUnsafe.getAndSetInt(o, offset, newValue);
}
/**
* Atomically exchanges the given value with the current value of
* a field or array element within the given object {@code o}
*** 953,969 ****
* @param offset field/element offset
* @param newValue new value
* @return the previous value
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
public final long getAndSetLong(Object o, long offset, long newValue) {
! long v;
! do {
! v = getLongVolatile(o, offset);
! } while (!compareAndSwapLong(o, offset, v, newValue));
! return v;
}
/**
* Atomically exchanges the given reference value with the current
* reference value of a field or array element within the given
--- 1196,1208 ----
* @param offset field/element offset
* @param newValue new value
* @return the previous value
* @since 1.8
*/
! @ForceInline
public final long getAndSetLong(Object o, long offset, long newValue) {
! return theInternalUnsafe.getAndSetLong(o, offset, newValue);
}
/**
* Atomically exchanges the given reference value with the current
* reference value of a field or array element within the given
*** 973,989 ****
* @param offset field/element offset
* @param newValue new value
* @return the previous value
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
public final Object getAndSetObject(Object o, long offset, Object newValue) {
! Object v;
! do {
! v = getObjectVolatile(o, offset);
! } while (!compareAndSwapObject(o, offset, v, newValue));
! return v;
}
/**
* Ensures that loads before the fence will not be reordered with loads and
--- 1212,1224 ----
* @param offset field/element offset
* @param newValue new value
* @return the previous value
* @since 1.8
*/
! @ForceInline
public final Object getAndSetObject(Object o, long offset, Object newValue) {
! return theInternalUnsafe.getAndSetObject(o, offset, newValue);
}
/**
* Ensures that loads before the fence will not be reordered with loads and
*** 995,1006 ****
* A pure LoadLoad fence is not provided, since the addition of LoadStore
* is almost always desired, and most current hardware instructions that
* provide a LoadLoad barrier also provide a LoadStore barrier for free.
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
! public native void loadFence();
/**
* Ensures that loads and stores before the fence will not be reordered with
* stores after the fence; a "StoreStore plus LoadStore barrier".
*
--- 1230,1243 ----
* A pure LoadLoad fence is not provided, since the addition of LoadStore
* is almost always desired, and most current hardware instructions that
* provide a LoadLoad barrier also provide a LoadStore barrier for free.
* @since 1.8
*/
! @ForceInline
! public void loadFence() {
! theInternalUnsafe.loadFence();
! }
/**
* Ensures that loads and stores before the fence will not be reordered with
* stores after the fence; a "StoreStore plus LoadStore barrier".
*
*** 1010,1038 ****
* A pure StoreStore fence is not provided, since the addition of LoadStore
* is almost always desired, and most current hardware instructions that
* provide a StoreStore barrier also provide a LoadStore barrier for free.
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
! public native void storeFence();
/**
* Ensures that loads and stores before the fence will not be reordered
* with loads and stores after the fence. Implies the effects of both
* loadFence() and storeFence(), and in addition, the effect of a StoreLoad
* barrier.
*
* Corresponds to C11 atomic_thread_fence(memory_order_seq_cst).
* @since 1.8
*/
! @HotSpotIntrinsicCandidate
! public native void fullFence();
!
! /**
! * Throws IllegalAccessError; for use by the VM for access control
! * error support.
! * @since 1.8
! */
! private static void throwIllegalAccessError() {
! throw new IllegalAccessError();
}
}
--- 1247,1270 ----
* A pure StoreStore fence is not provided, since the addition of LoadStore
* is almost always desired, and most current hardware instructions that
* provide a StoreStore barrier also provide a LoadStore barrier for free.
* @since 1.8
*/
! @ForceInline
! public void storeFence() {
! theInternalUnsafe.storeFence();
! }
/**
* Ensures that loads and stores before the fence will not be reordered
* with loads and stores after the fence. Implies the effects of both
* loadFence() and storeFence(), and in addition, the effect of a StoreLoad
* barrier.
*
* Corresponds to C11 atomic_thread_fence(memory_order_seq_cst).
* @since 1.8
*/
! @ForceInline
! public void fullFence() {
! theInternalUnsafe.fullFence();
}
}
src/java.base/share/classes/sun/misc/Unsafe.java
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