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comparison agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeCheckCast.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.interpreter;
26
27 import sun.jvm.hotspot.oops.*;
28 import sun.jvm.hotspot.utilities.*;
29
30 public class BytecodeCheckCast extends BytecodeWithKlass {
31 BytecodeCheckCast(Method method, int bci) {
32 super(method, bci);
33 }
34
35 public InstanceKlass getCheckCastKlass() {
36 return (InstanceKlass) getKlass();
37 }
38
39 public void verify() {
40 if (Assert.ASSERTS_ENABLED) {
41 Assert.that(isValid(), "check checkcast");
42 }
43 }
44
45 public boolean isValid() {
46 return javaCode() == Bytecodes._checkcast;
47 }
48
49 public static BytecodeCheckCast at(Method method, int bci) {
50 BytecodeCheckCast b = new BytecodeCheckCast(method, bci);
51 if (Assert.ASSERTS_ENABLED) {
52 b.verify();
53 }
54 return b;
55 }
56
57 /** Like at, but returns null if the BCI is not at checkcast */
58 public static BytecodeCheckCast atCheck(Method method, int bci) {
59 BytecodeCheckCast b = new BytecodeCheckCast(method, bci);
60 return (b.isValid() ? b : null);
61 }
62
63 public static BytecodeCheckCast at(BytecodeStream bcs) {
64 return new BytecodeCheckCast(bcs.method(), bcs.bci());
65 }
66 }