MethodIdItem.java revision 132eeaedf7d0980397fbdac41e1a7aebff01adbf 
1/*
2 * Copyright 2013, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.dexbacked.raw;
33
34import org.jf.dexlib2.dexbacked.DexBackedDexFile;
35import org.jf.dexlib2.dexbacked.raw.util.DexAnnotator;
36import org.jf.dexlib2.util.AnnotatedBytes;
37
38import javax.annotation.Nonnull;
39import javax.annotation.Nullable;
40
41public class MethodIdItem {
42    public static final int ITEM_SIZE = 8;
43
44    public static final int CLASS_OFFSET = 0;
45    public static final int PROTO_OFFSET = 2;
46    public static final int NAME_OFFSET = 4;
47
48    @Nonnull
49    public static SectionAnnotator makeAnnotator(@Nonnull DexAnnotator annotator, @Nonnull MapItem mapItem) {
50        return new SectionAnnotator(annotator, mapItem) {
51            @Nonnull @Override public String getItemName() {
52                return "method_id_item";
53            }
54
55            @Override
56            public void annotateItem(@Nonnull AnnotatedBytes out, int itemIndex, @Nullable String itemIdentity) {
57                int classIndex = dexFile.readUshort(out.getCursor());
58                out.annotate(2, "class_idx = %s", TypeIdItem.getReferenceAnnotation(dexFile, classIndex));
59
60                int protoIndex = dexFile.readUshort(out.getCursor());
61                out.annotate(2, "proto_idx = %s", ProtoIdItem.getReferenceAnnotation(dexFile, protoIndex));
62
63                int nameIndex = dexFile.readSmallUint(out.getCursor());
64                out.annotate(4, "name_idx = %s", StringIdItem.getReferenceAnnotation(dexFile, nameIndex));
65            }
66        };
67    }
68
69    @Nonnull
70    public static String asString(@Nonnull DexBackedDexFile dexFile, int methodIndex) {
71        int methodOffset = dexFile.getMethodIdItemOffset(methodIndex);
72        int classIndex = dexFile.readUshort(methodOffset + CLASS_OFFSET);
73        String classType = dexFile.getType(classIndex);
74
75        int protoIndex = dexFile.readUshort(methodOffset + PROTO_OFFSET);
76        String protoString = ProtoIdItem.asString(dexFile, protoIndex);
77
78        int nameIndex = dexFile.readSmallUint(methodOffset + NAME_OFFSET);
79        String methodName = dexFile.getString(nameIndex);
80
81        return String.format("%s->%s%s", classType, methodName, protoString);
82    }
83
84    @Nonnull
85    public static String getReferenceAnnotation(@Nonnull DexBackedDexFile dexFile, int methodIndex) {
86        try {
87            String methodString = asString(dexFile, methodIndex);
88            return String.format("method_id_item[%d]: %s", methodIndex, methodString);
89        } catch (Exception ex) {
90            ex.printStackTrace(System.err);
91        }
92        return String.format("method_id_item[%d]", methodIndex);
93    }
94
95    public static String[] getMethods(@Nonnull RawDexFile dexFile) {
96        MapItem mapItem = dexFile.getMapItemForSection(ItemType.METHOD_ID_ITEM);
97        if (mapItem == null) {
98            return new String[0];
99        }
100
101        int methodCount = mapItem.getItemCount();
102        String[] ret = new String[methodCount];
103        for (int i=0; i<methodCount; i++) {
104            ret[i] = asString(dexFile, i);
105        }
106        return ret;
107    }
108}
109