| /* |
| * 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"); |
| } |
| } |
| } |