1/*
2 * Copyright (c) 2001, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25package sun.jvm.hotspot.debugger.cdbg.basic;
26
27import sun.jvm.hotspot.debugger.*;
28import sun.jvm.hotspot.debugger.cdbg.*;
29
30/** Basic implementation of the CFrame interface providing some of the
31    functionality in a platform-independent manner. */
32
33public abstract class BasicCFrame implements CFrame {
34  private CDebugger dbg;
35
36  protected BasicCFrame(CDebugger dbg) {
37    this.dbg = dbg;
38  }
39
40  protected CDebugger dbg() {
41    return dbg;
42  }
43
44  public LoadObject loadObjectForPC() {
45    return dbg.loadObjectContainingPC(pc());
46  }
47
48  public BlockSym blockForPC() {
49    LoadObject lo = loadObjectForPC();
50    if (lo == null) {
51      return null;
52    }
53    return lo.debugInfoForPC(pc());
54  }
55
56  public ClosestSymbol closestSymbolToPC() {
57    LoadObject lo = loadObjectForPC();
58    if (lo == null) {
59      return null;
60    }
61    return lo.closestSymbolToPC(pc());
62  }
63
64  public void iterateLocals(ObjectVisitor v) {
65    BlockSym block = blockForPC();
66    while (block != null) {
67      for (int i = 0; i < block.getNumLocals(); i++) {
68        final LocalSym local = block.getLocal(i);
69        Type t = local.getType();
70        // t should not be null, but be robust in case of bugs in
71        // debug info
72        if (t != null) {
73          t.iterateObject(localVariableBase().addOffsetTo(local.getFrameOffset()),
74                          v,
75                          new NamedFieldIdentifier() {
76                              public Type getType() {
77                                return local.getType();
78                              }
79
80                              public String getName() {
81                                return local.getName();
82                              }
83
84                              public String toString() {
85                                return getName();
86                              }
87                            });
88        }
89      }
90
91      block = block.getParent();
92    }
93  }
94}
95