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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/builtins/SLHelloEqualsWorldBuiltin.java @ 15233:1f7fd2cc008f

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change return type of SLHelloEqualsWorldBuiltin
author Lukas Stadler <lukas.stadler@oracle.com>
date Fri, 18 Apr 2014 13:43:40 +0200
parents f675818d9ad0
children abe7128ca473 f6ac86d3334e
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1 /*
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2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl.builtins;
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24
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25 import com.oracle.truffle.api.*;
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26 import com.oracle.truffle.api.dsl.*;
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27 import com.oracle.truffle.api.frame.*;
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28 import com.oracle.truffle.api.frame.FrameInstance.FrameAccess;
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29 import com.oracle.truffle.api.nodes.*;
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30
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31 /**
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32 * This builtin sets the variable named "hello" in the caller frame to the string "world".
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33 */
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34 @NodeInfo(shortName = "helloEqualsWorld")
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35 public abstract class SLHelloEqualsWorldBuiltin extends SLBuiltinNode {
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36
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37 @Specialization
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38 public String change() {
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39 FrameInstance frameInstance = Truffle.getRuntime().getStackTrace().iterator().next();
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40 Frame frame = frameInstance.getFrame(FrameAccess.READ_WRITE, false);
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41 FrameSlot slot = frame.getFrameDescriptor().findOrAddFrameSlot("hello");
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42 frame.setObject(slot, "world");
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43 return "world";
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44 }
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45 }