--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/StackValue.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,125 @@
+/*
+ * 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");
+ }
+ }
+}