Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/StackValue.java @ 19491:4d66c000d253
Truffle/Instrumentation: more cleanup in Probe
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 18 Feb 2015 18:30:49 -0800 |
parents | 7588156f5cf9 |
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.runtime; import java.io.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.utilities.*; public class StackValue { private int type; private OopHandle handleValue; private long integerValue; public StackValue() { type = BasicType.getTConflict(); } public StackValue(OopHandle h, long scalar_replaced) { handleValue = h; type = BasicType.getTObject(); integerValue = scalar_replaced; Assert.that(integerValue == 0 || handleValue == null, "not null object should not be marked as scalar replaced"); } public StackValue(long i) { integerValue = i; type = BasicType.getTInt(); } /** This returns one of the "enum" values in BasicType.java */ public int getType() { return type; } public OopHandle getObject() { if (Assert.ASSERTS_ENABLED) { Assert.that(type == BasicType.getTObject(), "type check"); } return handleValue; } boolean objIsScalarReplaced() { if (Assert.ASSERTS_ENABLED) { Assert.that(type == BasicType.getTObject(), "type check"); } return integerValue != 0; } public long getInteger() { if (Assert.ASSERTS_ENABLED) { Assert.that(type == BasicType.getTInt(), "type check"); } return integerValue; } public boolean equals(Object arg) { if (arg == null) { return false; } if (!arg.getClass().equals(getClass())) { return false; } StackValue sv = (StackValue) arg; if (type != sv.type) { return false; } if (type == BasicType.getTObject()) { return handleValue.equals(sv.handleValue); } else if (type == BasicType.getTInt()) { return (integerValue == sv.integerValue); } else { // Conflict type (not yet used) return true; } } public int hashCode() { if (type == BasicType.getTObject()) { return handleValue != null ? handleValue.hashCode() : 5; } else { // Returns 0 for conflict type return (int) integerValue; } } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { if (type == BasicType.getTInt()) { tty.print(integerValue + " (long) " + (int) integerValue + " (int)"); } else if (type == BasicType.getTObject()) { tty.print("<" + handleValue + ">"); } else if (type == BasicType.getTConflict()) { tty.print("conflict"); } else { throw new RuntimeException("should not reach here"); } } }