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Copy pathPointer.java
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949 lines (778 loc) · 26 KB
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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
* that is described in this document. In particular, and without limitation, these intellectual property
* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
* more additional patents or pending patent applications in the U.S. and in other countries.
*
* U.S. Government Rights - Commercial software. Government users are subject to the Sun
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
* supplements.
*
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
* U.S. and other countries.
*
* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
* Company, Ltd.
*/
package com.sun.max.unsafe;
import static com.sun.cri.bytecode.Bytecodes.*;
import com.sun.cri.bytecode.*;
import com.sun.max.annotate.*;
import com.sun.max.asm.*;
import com.sun.max.lang.*;
import com.sun.max.lang.Bytes;
import com.sun.max.platform.*;
import com.sun.max.vm.reference.*;
import com.sun.max.vm.runtime.*;
import com.sun.max.vm.type.*;
/**
* Pointers are addresses with extra methods to access memory.
*
* @author Bernd Mathiske
*/
public abstract class Pointer extends Address implements Accessor {
private static final int FLOAT_SIZE = 4;
private static final int DOUBLE_SIZE = 8;
protected Pointer() {
}
public interface Procedure {
void run(Pointer pointer);
}
public interface Predicate {
boolean evaluate(Pointer pointer);
}
@INLINE
public static Pointer zero() {
return fromInt(0);
}
@INLINE
public static Pointer fromUnsignedInt(int value) {
return Address.fromUnsignedInt(value).asPointer();
}
@INLINE
public static Pointer fromInt(int value) {
return Address.fromInt(value).asPointer();
}
@INLINE
public static Pointer fromLong(long value) {
return Address.fromLong(value).asPointer();
}
@Override
public final String toString() {
return "^" + toHexString();
}
@Override
@INLINE
public final Pointer plus(int addend) {
return asAddress().plus(addend).asPointer();
}
@Override
@INLINE
public final Pointer plus(long addend) {
return asAddress().plus(addend).asPointer();
}
@Override
@INLINE
public final Pointer plus(Address addend) {
return asAddress().plus(addend).asPointer();
}
@Override
@INLINE
public final Pointer plus(Offset addend) {
return asAddress().plus(addend).asPointer();
}
@INLINE
public final Pointer plusWords(int nWords) {
return plus(nWords * Word.size());
}
@Override
@INLINE
public final Pointer minus(Address subtrahend) {
return asAddress().minus(subtrahend).asPointer();
}
@Override
@INLINE
public final Pointer minus(int subtrahend) {
return asAddress().minus(subtrahend).asPointer();
}
@Override
@INLINE
public final Pointer minus(long subtrahend) {
return asAddress().minus(subtrahend).asPointer();
}
@INLINE
public final Pointer minusWords(int nWords) {
return minus(nWords * Word.size());
}
@Override
@INLINE
public final Pointer minus(Offset subtrahend) {
return asAddress().minus(subtrahend).asPointer();
}
@Override
@INLINE
public final Pointer times(Address factor) {
return asAddress().times(factor).asPointer();
}
@Override
@INLINE
public final Pointer times(int factor) {
return asAddress().times(factor).asPointer();
}
@Override
@INLINE
public final Pointer dividedBy(Address divisor) {
return asAddress().dividedBy(divisor).asPointer();
}
@Override
@INLINE
public final Pointer dividedBy(int divisor) {
return asAddress().dividedBy(divisor).asPointer();
}
@Override
@INLINE
public final Pointer remainder(Address divisor) {
return asAddress().remainder(divisor).asPointer();
}
@Override
@INLINE
public final Pointer roundedUpBy(Address nBytes) {
return asAddress().roundedUpBy(nBytes).asPointer();
}
@Override
@INLINE
public final Pointer roundedUpBy(int nBytes) {
return asAddress().roundedUpBy(nBytes).asPointer();
}
@Override
@INLINE
public final Pointer roundedDownBy(int nBytes) {
return asAddress().roundedDownBy(nBytes).asPointer();
}
@Override
@INLINE
public final Pointer wordAligned() {
return asAddress().wordAligned().asPointer();
}
@Override
@INLINE(override = true)
public final boolean isWordAligned() {
return asAddress().isWordAligned();
}
@Override
@INLINE
public final Pointer bitSet(int index) {
return asAddress().bitSet(index).asPointer();
}
@Override
@INLINE
public final Pointer bitClear(int index) {
return asAddress().bitClear(index).asPointer();
}
@Override
@INLINE
public final Pointer and(Address operand) {
return asAddress().and(operand).asPointer();
}
@Override
@INLINE
public final Pointer and(int operand) {
return asAddress().and(operand).asPointer();
}
@Override
@INLINE
public final Pointer and(long operand) {
return asAddress().and(operand).asPointer();
}
@Override
@INLINE
public final Pointer or(Address operand) {
return asAddress().or(operand).asPointer();
}
@Override
@INLINE
public final Pointer or(int operand) {
return asAddress().or(operand).asPointer();
}
@Override
@INLINE
public final Pointer or(long operand) {
return asAddress().or(operand).asPointer();
}
@Override
@INLINE
public final Pointer not() {
return asAddress().not().asPointer();
}
@Override
@INLINE
public final Pointer shiftedLeft(int nBits) {
return asAddress().shiftedLeft(nBits).asPointer();
}
@Override
@INLINE
public final Pointer unsignedShiftedRight(int nBits) {
return asAddress().unsignedShiftedRight(nBits).asPointer();
}
@UNSAFE
@FOLD
private static boolean risc() {
return Platform.platform().isa.category == ISA.Category.RISC;
}
public byte readByte(int offset) {
return readByte(Offset.fromInt(offset));
}
public abstract byte readByte(Offset offset);
private native byte builtinGetByte(int displacement, int index);
@INLINE
public final byte getByte(int displacement, int index) {
if (risc()) {
return readByte(Offset.fromInt(index).plus(displacement));
}
return builtinGetByte(displacement, index);
}
@INLINE
public final byte getByte(int index) {
return getByte(0, index);
}
@INLINE
public final byte getByte() {
return getByte(0);
}
@INLINE
public final boolean readBoolean(Offset offset) {
return UnsafeCast.asBoolean(readByte(offset));
}
@INLINE
public final boolean readBoolean(int offset) {
return UnsafeCast.asBoolean(readByte(offset));
}
@INLINE
public final boolean getBoolean(int displacement, int index) {
return UnsafeCast.asBoolean(getByte(displacement, index));
}
@INLINE
public final boolean getBoolean(int index) {
return getBoolean(0, index);
}
@INLINE
public final boolean getBoolean() {
return getBoolean(0);
}
public final short readShort(int offset) {
return readShort(Offset.fromInt(offset));
}
public abstract short readShort(Offset offset);
private native short builtinGetShort(int displacement, int index);
@INLINE
public final short getShort(int displacement, int index) {
if (risc()) {
return readShort(Offset.fromInt(index).times(Shorts.SIZE).plus(displacement));
}
return builtinGetShort(displacement, index);
}
@INLINE
public final short getShort(int index) {
return getShort(0, index);
}
@INLINE
public final short getShort() {
return getShort(0);
}
public final char readChar(int offset) {
return readChar(Offset.fromInt(offset));
}
public abstract char readChar(Offset offset);
private native char builtinGetChar(int displacement, int index);
@INLINE
public final char getChar(int displacement, int index) {
if (risc()) {
return readChar(Offset.fromInt(index).times(Chars.SIZE).plus(displacement));
}
return builtinGetChar(displacement, index);
}
@INLINE
public final char getChar(int index) {
return getChar(0, index);
}
@INLINE
public final char getChar() {
return getChar(0);
}
public final int readInt(int offset) {
return readInt(Offset.fromInt(offset));
}
public abstract int readInt(Offset offset);
private native int builtinGetInt(int displacement, int index);
@INLINE
public final int getInt(int displacement, int index) {
if (risc()) {
return readInt(Offset.fromInt(index).times(Ints.SIZE).plus(displacement));
}
return builtinGetInt(displacement, index);
}
@INLINE
public final int getInt(int index) {
return getInt(0, index);
}
@INLINE
public final int getInt() {
return getInt(0);
}
public final float readFloat(int offset) {
return readFloat(Offset.fromInt(offset));
}
public abstract float readFloat(Offset offset);
private native float builtinGetFloat(int displacement, int index);
@INLINE
public final float getFloat(int displacement, int index) {
if (risc()) {
return readFloat(Offset.fromInt(index).times(FLOAT_SIZE).plus(displacement));
}
return builtinGetFloat(displacement, index);
}
@INLINE
public final float getFloat(int index) {
return getFloat(0, index);
}
@INLINE
public final float getFloat() {
return getFloat(0);
}
public final long readLong(int offset) {
return readLong(Offset.fromInt(offset));
}
public abstract long readLong(Offset offset);
private native long builtinGetLong(int displacement, int index);
@INLINE
public final long getLong(int displacement, int index) {
if (risc()) {
return readLong(Offset.fromInt(index).times(Longs.SIZE).plus(displacement));
}
return builtinGetLong(displacement, index);
}
@INLINE
public final long getLong(int index) {
return getLong(0, index);
}
@INLINE
public final long getLong() {
return getLong(0);
}
public final double readDouble(int offset) {
return readDouble(Offset.fromInt(offset));
}
public abstract double readDouble(Offset offset);
private native double builtinGetDouble(int displacement, int index);
@INLINE
public final double getDouble(int displacement, int index) {
if (risc()) {
return readDouble(Offset.fromInt(index).times(DOUBLE_SIZE).plus(displacement));
}
return builtinGetDouble(displacement, index);
}
@INLINE
public final double getDouble(int index) {
return getDouble(0, index);
}
@INLINE
public final double getDouble() {
return getDouble(0);
}
public final Word readWord(int offset) {
return readWord(Offset.fromInt(offset));
}
public abstract Word readWord(Offset offset);
private native Word builtinGetWord(int displacement, int index);
@INLINE
public final Word getWord(int displacement, int index) {
if (risc()) {
return readWord(Offset.fromInt(index).times(Word.size()).plus(displacement));
}
return builtinGetWord(displacement, index);
}
@INLINE
public final Word getWord(int index) {
return getWord(0, index);
}
@INLINE
public final Word getWord() {
return getWord(0);
}
public final Reference readReference(int offset) {
return readReference(Offset.fromInt(offset));
}
public abstract Reference readReference(Offset offset);
private native Reference builtinGetReference(int displacement, int index);
@INLINE
public final Reference getReference(int displacement, int index) {
if (risc()) {
return readReference(Offset.fromInt(index).times(Word.size()).plus(displacement));
}
return builtinGetReference(displacement, index);
}
@INLINE
public final Reference getReference(int index) {
return getReference(0, index);
}
@INLINE
public final Reference getReference() {
return getReference(0);
}
public final void writeByte(int offset, byte value) {
writeByte(Offset.fromInt(offset), value);
}
public abstract void writeByte(Offset offset, byte value);
private native void builtinSetByte(int displacement, int index, byte value);
@INLINE
public final void setByte(int displacement, int index, byte value) {
if (risc()) {
writeByte(Offset.fromInt(index).plus(displacement), value);
} else {
builtinSetByte(displacement, index, value);
}
}
@INLINE
public final void setByte(int index, byte value) {
setByte(0, index, value);
}
@INLINE
public final void setByte(byte value) {
setByte(0, value);
}
@INLINE
public final void writeBoolean(Offset offset, boolean value) {
writeByte(offset, UnsafeCast.asByte(value));
}
@INLINE
public final void writeBoolean(int offset, boolean value) {
writeByte(offset, UnsafeCast.asByte(value));
}
@INLINE
public final void setBoolean(int displacement, int index, boolean value) {
setByte(displacement, index, UnsafeCast.asByte(value));
}
@INLINE
public final void setBoolean(int index, boolean value) {
setBoolean(0, index, value);
}
@INLINE
public final void setBoolean(boolean value) {
setBoolean(0, value);
}
public final void writeShort(int offset, short value) {
writeShort(Offset.fromInt(offset), value);
}
public abstract void writeShort(Offset offset, short value);
private native void builtinSetShort(int displacement, int index, short value);
@INLINE
public final void setShort(int displacement, int index, short value) {
if (risc()) {
writeShort(Offset.fromInt(index).times(Shorts.SIZE).plus(displacement), value);
} else {
builtinSetShort(displacement, index, value);
}
}
@INLINE
public final void setShort(int index, short value) {
setShort(0, index, value);
}
@INLINE
public final void setShort(short value) {
setShort(0, value);
}
@INLINE
public final void writeChar(Offset offset, char value) {
writeShort(offset, UnsafeCast.asShort(value));
}
@INLINE
public final void writeChar(int offset, char value) {
writeShort(offset, UnsafeCast.asShort(value));
}
@INLINE
public final void setChar(int displacement, int index, char value) {
setShort(displacement, index, UnsafeCast.asShort(value));
}
@INLINE
public final void setChar(int index, char value) {
setChar(0, index, value);
}
@INLINE
public final void setChar(char value) {
setChar(0, value);
}
public final void writeInt(int offset, int value) {
writeInt(Offset.fromInt(offset), value);
}
public abstract void writeInt(Offset offset, int value);
private native void builtinSetInt(int displacement, int index, int value);
@INLINE
public final void setInt(int displacement, int index, int value) {
if (risc()) {
writeInt(Offset.fromInt(index).times(Ints.SIZE).plus(displacement), value);
} else {
builtinSetInt(displacement, index, value);
}
}
@INLINE
public final void setInt(int index, int value) {
setInt(0, index, value);
}
@INLINE
public final void setInt(int value) {
setInt(0, value);
}
public final void writeFloat(int offset, float value) {
writeFloat(Offset.fromInt(offset), value);
}
public abstract void writeFloat(Offset offset, float value);
private native void builtinSetFloat(int displacement, int index, float value);
@INLINE
public final void setFloat(int displacement, int index, float value) {
if (risc()) {
writeFloat(Offset.fromInt(index).times(FLOAT_SIZE).plus(displacement), value);
} else {
builtinSetFloat(displacement, index, value);
}
}
@INLINE
public final void setFloat(int index, float value) {
setFloat(0, index, value);
}
@INLINE
public final void setFloat(float value) {
setFloat(0, value);
}
public final void writeLong(int offset, long value) {
writeLong(Offset.fromInt(offset), value);
}
public abstract void writeLong(Offset offset, long value);
private native void builtinSetLong(int displacement, int index, long value);
@INLINE
public final void setLong(int displacement, int index, long value) {
if (risc()) {
writeLong(Offset.fromInt(index).times(Longs.SIZE).plus(displacement), value);
} else {
builtinSetLong(displacement, index, value);
}
}
@INLINE
public final void setLong(int index, long value) {
setLong(0, index, value);
}
@INLINE
public final void setLong(long value) {
setLong(0, value);
}
public final void writeDouble(int offset, double value) {
writeDouble(Offset.fromInt(offset), value);
}
public abstract void writeDouble(Offset offset, double value);
private native void builtinSetDouble(int displacement, int index, double value);
@INLINE
public final void setDouble(int displacement, int index, double value) {
if (risc()) {
writeDouble(Offset.fromInt(index).times(DOUBLE_SIZE).plus(displacement), value);
} else {
builtinSetDouble(displacement, index, value);
}
}
@INLINE
public final void setDouble(int index, double value) {
setDouble(0, index, value);
}
@INLINE
public final void setDouble(double value) {
setDouble(0, value);
}
public final void writeWord(int offset, Word value) {
writeWord(Offset.fromInt(offset), value);
}
public abstract void writeWord(Offset offset, Word value);
private native void builtinSetWord(int displacement, int index, Word value);
@INLINE
public final void setWord(int displacement, int index, Word value) {
if (risc()) {
writeWord(Offset.fromInt(index).times(Word.size()).plus(displacement), value);
} else {
builtinSetWord(displacement, index, value);
}
}
@INLINE
public final void setWord(int index, Word value) {
setWord(0, index, value);
}
@INLINE
public final void setWord(Word value) {
setWord(0, value);
}
public final void writeReference(int offset, Reference value) {
writeReference(Offset.fromInt(offset), value);
}
public abstract void writeReference(Offset offset, Reference value);
private native void builtinSetReference(int displacement, int index, Reference value);
@INLINE
public final void setReference(int displacement, int index, Reference value) {
if (risc()) {
writeReference(Offset.fromInt(index).times(Word.size()).plus(displacement), value);
} else {
builtinSetReference(displacement, index, value);
}
}
@INLINE
public final void setReference(int index, Reference value) {
setReference(0, index, value);
}
@INLINE
public final void setReference(Reference value) {
setReference(0, value);
}
/**
* @see Accessor#compareAndSwapInt(Offset, int, int)
*/
public native int compareAndSwapInt(int offset, int expectedValue, int newValue);
/**
* @see Accessor#compareAndSwapInt(Offset, int, int)
*/
public native int compareAndSwapInt(Offset offset, int expectedValue, int newValue);
/**
* @see Accessor#compareAndSwapInt(Offset, int, int)
*/
public native Word compareAndSwapWord(int offset, Word expectedValue, Word newValue);
/**
* @see Accessor#compareAndSwapInt(Offset, int, int)
*/
public native Word compareAndSwapWord(Offset offset, Word expectedValue, Word newValue);
/**
* @see Accessor#compareAndSwapInt(Offset, int, int)
*/
public native Reference compareAndSwapReference(int offset, Reference expectedValue, Reference newValue);
/**
* @see Accessor#compareAndSwapInt(Offset, int, int)
*/
public native Reference compareAndSwapReference(Offset offset, Reference expectedValue, Reference newValue);
/**
* Sets a bit in the bit map whose base is denoted by the value of this pointer.
*
* ATTENTION: There is no protection against concurrent access to the affected byte.
*
* This method may read the affected byte first, then set the bit in it and then write the byte back.
*
* @param bitIndex the index of the bit to set
*/
public void setBit(int bitIndex) {
final int byteIndex = Unsigned.idiv(bitIndex, Bytes.WIDTH);
byte byteValue = getByte(byteIndex);
byteValue |= 1 << (bitIndex % Bytes.WIDTH);
setByte(byteIndex, byteValue);
}
/**
* Modifies up to 8 bits in the bit map whose base is denoted by the value of this pointer
* by OR'ing in a given 8-bit mask.
*
* ATTENTION: There is no protection against concurrent access to affected bytes.
*
* This method may read each affected byte first, then set some bits in it and then write the byte back.
* There are either 1 or 2 affected bytes, depending on alignment of the bit index to bytes in memory.
*
* @param bitIndex the index of the first bit to set
* @param bits a mask of 8 bits OR'ed with the 8 bits in this bit map starting at {@code bitIndex}
*/
public void setBits(int bitIndex, byte bits) {
// If we do not mask off the leading bits after a conversion to int right here,
// then the arithmetic operations below will convert implicitly to int and may insert sign bits.
final int intBits = bits & 0xff;
int byteIndex = Unsigned.idiv(bitIndex, Bytes.WIDTH);
final int rest = bitIndex % Bytes.WIDTH;
byte byteValue = getByte(byteIndex);
byteValue |= intBits << rest;
setByte(byteIndex, byteValue);
if (rest > 0) {
byteIndex++;
byteValue = getByte(byteIndex);
byteValue |= intBits >>> (Bytes.WIDTH - rest);
setByte(byteIndex, byteValue);
}
}
public final void copyElements(int displacement, int srcIndex, Object dst, int dstIndex, int length) {
Kind kind = Kind.fromJava(dst.getClass().getComponentType());
switch (kind.asEnum) {
case BOOLEAN: {
boolean[] arr = (boolean[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getBoolean(displacement, srcIndex);
}
break;
}
case BYTE: {
byte[] arr = (byte[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getByte(displacement, srcIndex);
}
break;
}
case CHAR: {
char[] arr = (char[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getChar(displacement, srcIndex);
}
break;
}
case SHORT: {
short[] arr = (short[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getShort(displacement, srcIndex);
}
break;
}
case INT: {
int[] arr = (int[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getInt(displacement, srcIndex);
}
break;
}
case FLOAT: {
float[] arr = (float[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getFloat(displacement, srcIndex);
}
break;
}
case LONG: {
long[] arr = (long[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getLong(displacement, srcIndex);
}
break;
}
case DOUBLE: {
double[] arr = (double[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getDouble(displacement, srcIndex);
}
break;
}
case REFERENCE: {
Reference[] arr = (Reference[]) dst;
for (int i = 0; i < length; ++i) {
arr[dstIndex + i] = getReference(displacement, srcIndex);
}
break;
}
case WORD: {
Word[] arr = (Word[]) dst;
for (int i = 0; i < length; ++i) {
WordArray.set(arr, dstIndex + i, getWord(displacement, srcIndex));
}
break;
}
default:
throw FatalError.unexpected("invalid type");
}
}
}