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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2013, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.oracle.truffle.object;
import com.oracle.truffle.api.Assumption;
import com.oracle.truffle.api.Truffle;
import com.oracle.truffle.api.nodes.UnexpectedResultException;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.object.FinalLocationException;
import com.oracle.truffle.api.object.IncompatibleLocationException;
import com.oracle.truffle.api.object.Location;
import com.oracle.truffle.api.object.LongLocation;
import com.oracle.truffle.api.object.Shape;
/** @since 0.17 or earlier */
@SuppressWarnings("deprecation")
public abstract class LocationImpl extends Location {
/**
* @since 0.17 or earlier
*/
protected LocationImpl() {
}
/** @since 0.17 or earlier */
public interface InternalLongLocation extends LongLocation {
/** @since 0.17 or earlier */
void setLongInternal(DynamicObject store, long value);
/** @since 0.17 or earlier */
String getWhereString();
}
/** @since 0.17 or earlier */
public interface LocationVisitor {
/** @since 0.17 or earlier */
void visitObjectField(int index, int count);
/** @since 0.17 or earlier */
void visitObjectArray(int index, int count);
/** @since 0.17 or earlier */
void visitPrimitiveField(int index, int count);
/** @since 0.17 or earlier */
void visitPrimitiveArray(int index, int count);
}
/** @since 0.17 or earlier */
@Override
public void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException {
set(store, value, checkShape(store, shape));
}
@Override
public void set(DynamicObject store, Object value, Shape oldShape, Shape newShape) throws IncompatibleLocationException {
if (canStore(value)) {
LayoutImpl.ACCESS.growAndSetShape(store, oldShape, newShape);
try {
setInternal(store, value);
} catch (IncompatibleLocationException ex) {
throw new IllegalStateException();
}
} else {
throw incompatibleLocation();
}
}
/** @since 0.17 or earlier */
@Override
protected final Object getInternal(DynamicObject store) {
throw new UnsupportedOperationException();
}
/**
* Get object value as object at this location in store. For internal use only.
*
* @param condition the result of a shape check or {@code false}
*/
@Override
public abstract Object get(DynamicObject store, boolean condition);
protected long getLong(DynamicObject store, boolean condition) throws UnexpectedResultException {
return expectLong(get(store, condition));
}
protected int getInt(DynamicObject store, boolean condition) throws UnexpectedResultException {
return expectInteger(get(store, condition));
}
protected double getDouble(DynamicObject store, boolean condition) throws UnexpectedResultException {
return expectDouble(get(store, condition));
}
protected boolean getBoolean(DynamicObject store, boolean condition) throws UnexpectedResultException {
return expectBoolean(get(store, condition));
}
@SuppressWarnings("unused")
protected void set(DynamicObject store, Object value, boolean condition) throws IncompatibleLocationException, FinalLocationException {
setInternal(store, value, condition);
}
protected abstract void setInternal(DynamicObject store, Object value, boolean condition) throws IncompatibleLocationException;
/**
* Equivalent to {@link Shape#check(DynamicObject)}.
*/
protected static final boolean checkShape(DynamicObject store, Shape shape) {
return store.getShape() == shape;
}
/** @since 0.17 or earlier */
@Override
protected final void setInternal(DynamicObject store, Object value) throws IncompatibleLocationException {
setInternal(store, value, false);
}
/** @since 0.17 or earlier */
@Override
public boolean canSet(DynamicObject store, Object value) {
return canStore(value) && canStoreFinal(store, value);
}
/** @since 0.17 or earlier */
@Override
public boolean canSet(Object value) {
return canSet(null, value);
}
/** @since 0.17 or earlier */
@Override
public boolean canStore(Object value) {
return true;
}
/** @since 0.17 or earlier */
@SuppressWarnings("unused")
protected boolean canStoreFinal(DynamicObject store, Object value) {
return true;
}
/** @since 0.17 or earlier */
@Override
public boolean isFinal() {
return false;
}
/** @since 0.17 or earlier */
@Override
public boolean isConstant() {
return false;
}
/** @since 0.17 or earlier */
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (isFinal() ? 1231 : 1237);
return result;
}
/** @since 0.17 or earlier */
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
return true;
}
/** @since 0.17 or earlier */
@Override
public String toString() {
String finalString = isFinal() ? "f" : "";
String typeString = (this instanceof com.oracle.truffle.api.object.TypedLocation ? ((com.oracle.truffle.api.object.TypedLocation) this).getType().getSimpleName() : "Object");
return finalString + typeString + getWhereString();
}
/** @since 0.17 or earlier */
protected String getWhereString() {
return "";
}
/**
* Get the number of object array elements this location requires.
*
* @since 0.17 or earlier
*/
public int objectArrayCount() {
return 0;
}
/**
* Get the number of in-object {@link Object} fields this location requires.
*
* @since 0.17 or earlier
*/
public int objectFieldCount() {
return 0;
}
/**
* Get the number of in-object primitive fields this location requires.
*
* @since 0.17 or earlier
*/
public int primitiveFieldCount() {
return 0;
}
/**
* Get the number of primitive array elements this location requires.
*
* @since 0.17 or earlier
*/
public int primitiveArrayCount() {
return 0;
}
/**
* Accept a visitor for location allocation for this and every nested location.
*
* @param locationVisitor visitor to be notified of every allocated slot in use by this location
* @since 0.17 or earlier
*/
public abstract void accept(LocationVisitor locationVisitor);
protected LocationImpl getInternalLocation() {
return this;
}
static boolean isSameLocation(LocationImpl loc1, LocationImpl loc2) {
return loc1 == loc2 || loc1.getInternalLocation().equals(loc2.getInternalLocation());
}
@SuppressWarnings("unused")
protected void setInt(DynamicObject store, int value, boolean condition) throws IncompatibleLocationException, FinalLocationException {
set(store, value, condition);
}
@SuppressWarnings("unused")
protected void setLong(DynamicObject store, long value, boolean condition) throws IncompatibleLocationException, FinalLocationException {
set(store, value, condition);
}
@SuppressWarnings("unused")
protected void setDouble(DynamicObject store, double value, boolean condition) throws IncompatibleLocationException, FinalLocationException {
set(store, value, condition);
}
protected boolean isIntLocation() {
return false;
}
protected boolean isLongLocation() {
return false;
}
protected boolean isDoubleLocation() {
return false;
}
protected boolean isImplicitCastIntToLong() {
return false;
}
protected boolean isImplicitCastIntToDouble() {
return false;
}
static boolean expectBoolean(Object value) throws UnexpectedResultException {
if (value instanceof Boolean) {
return (boolean) value;
}
throw new UnexpectedResultException(value);
}
static int expectInteger(Object value) throws UnexpectedResultException {
if (value instanceof Integer) {
return (int) value;
}
throw new UnexpectedResultException(value);
}
static double expectDouble(Object value) throws UnexpectedResultException {
if (value instanceof Double) {
return (double) value;
}
throw new UnexpectedResultException(value);
}
static long expectLong(Object value) throws UnexpectedResultException {
if (value instanceof Long) {
return (long) value;
}
throw new UnexpectedResultException(value);
}
public Class getType() {
return null;
}
@Override
public Assumption getFinalAssumption() {
return neverValidAssumption();
}
/** Not using NeverValidAssumption.INSTANCE in order not to pollute profiles. */
protected static Assumption neverValidAssumption() {
return NEVER_VALID_ASSUMPTION;
}
/** Not using AlwaysValidAssumption.INSTANCE in order not to pollute profiles. */
protected static Assumption alwaysValidAssumption() {
return ALWAYS_VALID_ASSUMPTION;
}
private static final Assumption NEVER_VALID_ASSUMPTION;
private static final Assumption ALWAYS_VALID_ASSUMPTION;
static {
NEVER_VALID_ASSUMPTION = Truffle.getRuntime().createAssumption("never valid");
NEVER_VALID_ASSUMPTION.invalidate();
ALWAYS_VALID_ASSUMPTION = Truffle.getRuntime().createAssumption("always valid");
}
}