Mercurial > hg > graal-compiler
view graal/com.oracle.graal.compiler.common/src/com/oracle/graal/compiler/common/Fields.java @ 19741:b53f87e24a7b
Truffle: deactivate assertion that is cause performance problems
author | Christian Wirth <christian.wirth@oracle.com> |
---|---|
date | Tue, 10 Mar 2015 09:22:10 +0100 |
parents | d66c79acfeac |
children | 5bf195ce816a |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.compiler.common; import static com.oracle.graal.compiler.common.UnsafeAccess.*; import java.util.*; import sun.misc.*; /** * Describes fields in a class, primarily for access via {@link Unsafe}. */ public class Fields { /** * Offsets used with {@link Unsafe} to access the fields. */ protected final long[] offsets; /** * The names of the fields. */ private final String[] names; /** * The types of the fields. */ private final Class<?>[] types; public static Fields forClass(Class<?> clazz, Class<?> endClazz, boolean includeTransient, FieldsScanner.CalcOffset calcOffset) { FieldsScanner scanner = new FieldsScanner(calcOffset == null ? new FieldsScanner.DefaultCalcOffset() : calcOffset); scanner.scan(clazz, endClazz, includeTransient); return new Fields(scanner.data); } public Fields(ArrayList<? extends FieldsScanner.FieldInfo> fields) { Collections.sort(fields); this.offsets = new long[fields.size()]; this.names = new String[offsets.length]; this.types = new Class[offsets.length]; int index = 0; for (FieldsScanner.FieldInfo f : fields) { offsets[index] = f.offset; names[index] = f.name; types[index] = f.type; index++; } } /** * Gets the number of fields represented by this object. */ public int getCount() { return offsets.length; } public static void translateInto(Fields fields, ArrayList<FieldsScanner.FieldInfo> infos) { for (int index = 0; index < fields.getCount(); index++) { infos.add(new FieldsScanner.FieldInfo(fields.offsets[index], fields.names[index], fields.types[index])); } } /** * Function enabling an object field value to be replaced with another value when being copied * within {@link Fields#copy(Object, Object, ObjectTransformer)}. */ @FunctionalInterface public interface ObjectTransformer { Object apply(int index, Object from); } /** * Copies fields from {@code from} to {@code to}, both of which must be of the same type. * * @param from the object from which the fields should be copied * @param to the object to which the fields should be copied */ public void copy(Object from, Object to) { copy(from, to, null); } /** * Copies fields from {@code from} to {@code to}, both of which must be of the same type. * * @param from the object from which the fields should be copied * @param to the object to which the fields should be copied * @param trans function to applied to object field values as they are copied. If {@code null}, * the value is copied unchanged. */ public void copy(Object from, Object to, ObjectTransformer trans) { assert from.getClass() == to.getClass(); for (int index = 0; index < offsets.length; index++) { long offset = offsets[index]; Class<?> type = types[index]; if (type.isPrimitive()) { if (type == Integer.TYPE) { unsafe.putInt(to, offset, unsafe.getInt(from, offset)); } else if (type == Long.TYPE) { unsafe.putLong(to, offset, unsafe.getLong(from, offset)); } else if (type == Boolean.TYPE) { unsafe.putBoolean(to, offset, unsafe.getBoolean(from, offset)); } else if (type == Float.TYPE) { unsafe.putFloat(to, offset, unsafe.getFloat(from, offset)); } else if (type == Double.TYPE) { unsafe.putDouble(to, offset, unsafe.getDouble(from, offset)); } else if (type == Short.TYPE) { unsafe.putShort(to, offset, unsafe.getShort(from, offset)); } else if (type == Character.TYPE) { unsafe.putChar(to, offset, unsafe.getChar(from, offset)); } else if (type == Byte.TYPE) { unsafe.putByte(to, offset, unsafe.getByte(from, offset)); } else { assert false : "unhandled property type: " + type; } } else { Object obj = unsafe.getObject(from, offset); unsafe.putObject(to, offset, trans == null ? obj : trans.apply(index, obj)); } } } /** * Gets the value of a field for a given object. * * @param object the object whose field is to be read * @param index the index of the field (between 0 and {@link #getCount()}) * @return the value of the specified field which will be boxed if the field type is primitive */ public Object get(Object object, int index) { long offset = offsets[index]; Class<?> type = types[index]; Object value = null; if (type.isPrimitive()) { if (type == Integer.TYPE) { value = unsafe.getInt(object, offset); } else if (type == Long.TYPE) { value = unsafe.getLong(object, offset); } else if (type == Boolean.TYPE) { value = unsafe.getBoolean(object, offset); } else if (type == Float.TYPE) { value = unsafe.getFloat(object, offset); } else if (type == Double.TYPE) { value = unsafe.getDouble(object, offset); } else if (type == Short.TYPE) { value = unsafe.getShort(object, offset); } else if (type == Character.TYPE) { value = unsafe.getChar(object, offset); } else if (type == Byte.TYPE) { value = unsafe.getByte(object, offset); } else { assert false : "unhandled property type: " + type; } } else { value = unsafe.getObject(object, offset); } return value; } /** * Determines if a field in the domain of this object is the same as the field denoted by the * same index in another {@link Fields} object. */ public boolean isSame(Fields other, int index) { return other.offsets[index] == offsets[index]; } /** * Gets the name of a field. * * @param index index of a field */ public String getName(int index) { return names[index]; } /** * Gets the type of a field. * * @param index index of a field */ public Class<?> getType(int index) { return types[index]; } /** * Checks that a given field is assignable from a given value. * * @param index the index of the field to check * @param value a value that will be assigned to the field */ private boolean checkAssignableFrom(Object object, int index, Object value) { assert value == null || getType(index).isAssignableFrom(value.getClass()) : String.format("Field %s.%s of type %s is not assignable from %s", object.getClass().getSimpleName(), getName(index), getType(index).getSimpleName(), value.getClass().getSimpleName()); return true; } public void set(Object object, int index, Object value) { long offset = offsets[index]; Class<?> type = types[index]; if (type.isPrimitive()) { if (type == Integer.TYPE) { unsafe.putInt(object, offset, (Integer) value); } else if (type == Long.TYPE) { unsafe.putLong(object, offset, (Long) value); } else if (type == Boolean.TYPE) { unsafe.putBoolean(object, offset, (Boolean) value); } else if (type == Float.TYPE) { unsafe.putFloat(object, offset, (Float) value); } else if (type == Double.TYPE) { unsafe.putDouble(object, offset, (Double) value); } else if (type == Short.TYPE) { unsafe.putShort(object, offset, (Short) value); } else if (type == Character.TYPE) { unsafe.putChar(object, offset, (Character) value); } else if (type == Byte.TYPE) { unsafe.putByte(object, offset, (Byte) value); } else { assert false : "unhandled property type: " + type; } } else { assert checkAssignableFrom(object, index, value); unsafe.putObject(object, offset, value); } } @Override public String toString() { StringBuilder sb = new StringBuilder(getClass().getSimpleName()).append('['); appendFields(sb); return sb.append(']').toString(); } public void appendFields(StringBuilder sb) { for (int i = 0; i < offsets.length; i++) { sb.append(i == 0 ? "" : ", ").append(getName(i)).append('@').append(offsets[i]); } } public boolean getBoolean(Object n, int i) { assert types[i] == boolean.class; return unsafe.getBoolean(n, offsets[i]); } public byte getByte(Object n, int i) { assert types[i] == byte.class; return unsafe.getByte(n, offsets[i]); } public short getShort(Object n, int i) { assert types[i] == short.class; return unsafe.getShort(n, offsets[i]); } public char getChar(Object n, int i) { assert types[i] == char.class; return unsafe.getChar(n, offsets[i]); } public int getInt(Object n, int i) { assert types[i] == int.class; return unsafe.getInt(n, offsets[i]); } public long getLong(Object n, int i) { assert types[i] == long.class; return unsafe.getLong(n, offsets[i]); } public float getFloat(Object n, int i) { assert types[i] == float.class; return unsafe.getFloat(n, offsets[i]); } public double getDouble(Object n, int i) { assert types[i] == double.class; return unsafe.getDouble(n, offsets[i]); } public Object getObject(Object object, int i) { assert !types[i].isPrimitive(); return unsafe.getObject(object, offsets[i]); } public void putObject(Object object, int i, Object value) { assert checkAssignableFrom(object, i, value); unsafe.putObject(object, offsets[i], value); } }