Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/code/ScopeValue.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2009, 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 sun.jvm.hotspot.code; import java.io.*; import sun.jvm.hotspot.utilities.*; /** <P> Classes used for serializing debugging information. These abstractions are introducted to provide symmetric read and write operations. </P> <P> <UL> <LI> ScopeValue: describes the value of a variable/expression in a scope <UL> <LI> LocationValue: describes a value in a given location (in frame or register) <LI> ConstantValue: describes a constant </UL> </UL> </P> */ public abstract class ScopeValue { // Package private enumeration values (FIXME: read from target VM) static final int LOCATION_CODE = 0; static final int CONSTANT_INT_CODE = 1; static final int CONSTANT_OOP_CODE = 2; static final int CONSTANT_LONG_CODE = 3; static final int CONSTANT_DOUBLE_CODE = 4; static final int CONSTANT_OBJECT_CODE = 5; static final int CONSTANT_OBJECT_ID_CODE = 6; public boolean isLocation() { return false; } public boolean isConstantInt() { return false; } public boolean isConstantDouble() { return false; } public boolean isConstantLong() { return false; } public boolean isConstantOop() { return false; } public boolean isObject() { return false; } public static ScopeValue readFrom(DebugInfoReadStream stream) { switch (stream.readInt()) { case LOCATION_CODE: return new LocationValue(stream); case CONSTANT_INT_CODE: return new ConstantIntValue(stream); case CONSTANT_OOP_CODE: return new ConstantOopReadValue(stream); case CONSTANT_LONG_CODE: return new ConstantLongValue(stream); case CONSTANT_DOUBLE_CODE: return new ConstantDoubleValue(stream); case CONSTANT_OBJECT_CODE: return stream.readObjectValue(); case CONSTANT_OBJECT_ID_CODE: return stream.getCachedObject(); default: Assert.that(false, "should not reach here"); return null; } } public abstract void printOn(PrintStream tty); }