1 /*
2 * Copyright 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "GcdaParser.h"
18
19 #include <iostream>
20 #include <vector>
21
22 #include "GcdaFile.h"
23
24 using namespace std;
25
26 namespace android {
27 namespace vts {
28
ParseMagic()29 bool GcdaRawCoverageParser::ParseMagic() {
30 unsigned magic = gcda_file_->ReadUnsigned();
31 unsigned version;
32 const char* type = NULL;
33 int endianness = 0;
34 char m[4], v[4];
35
36 if ((endianness = gcda_file_->Magic(magic, GCOV_DATA_MAGIC))) {
37 type = "data";
38 } else {
39 cout << __func__ << ": not a GCOV file, " << filename_ << endl;
40 gcda_file_->Close();
41 return false;
42 }
43 version = gcda_file_->ReadUnsigned();
44 GCOV_UNSIGNED2STRING(v, version);
45 GCOV_UNSIGNED2STRING(m, magic);
46 if (version != GCOV_VERSION) {
47 char e[4];
48 GCOV_UNSIGNED2STRING(e, GCOV_VERSION);
49 }
50 return true;
51 }
52
ParseBody()53 void GcdaRawCoverageParser::ParseBody() {
54 unsigned tags[4];
55 unsigned depth = 0;
56 bool found;
57 unsigned base;
58 unsigned position;
59 unsigned tag;
60 unsigned length;
61 unsigned tag_depth;
62 int error;
63 unsigned mask;
64
65 gcda_file_->ReadUnsigned(); // stamp
66 while (1) {
67 position = gcda_file_->Position();
68
69 tag = gcda_file_->ReadUnsigned();
70 if (!tag) break;
71
72 length = gcda_file_->ReadUnsigned();
73 base = gcda_file_->Position();
74 mask = GCOV_TAG_MASK(tag) >> 1;
75 for (tag_depth = 4; mask; mask >>= 8) {
76 if ((mask & 0xff) != 0xff) {
77 cerr << __func__ << ": invalid tag, " << tag << endl;
78 break;
79 }
80 tag_depth--;
81 }
82 found = false;
83
84 if (tag) {
85 if (depth && depth < tag_depth &&
86 !GCOV_TAG_IS_SUBTAG(tags[depth - 1], tag)) {
87 cerr << __func__ << ": incorrectly nested tag, " << tag << endl;
88 }
89 depth = tag_depth;
90 tags[depth - 1] = tag;
91 }
92
93 switch(tag) {
94 case GCOV_TAG_FUNCTION:
95 TagFunction(tag, length);
96 break;
97 case GCOV_TAG_BLOCKS:
98 TagBlocks(tag, length);
99 break;
100 case GCOV_TAG_ARCS:
101 TagArcs(tag, length);
102 break;
103 case GCOV_TAG_LINES:
104 TagLines(tag, length);
105 break;
106 }
107 gcda_file_->Sync(base, length);
108
109 if ((error = gcda_file_->IsError())) {
110 cerr << __func__ << ": I/O error at "
111 << gcda_file_->Position() << endl;
112 break;
113 }
114 }
115 }
116
Parse()117 vector<unsigned> GcdaRawCoverageParser::Parse() {
118 result.clear();
119 if (!gcda_file_->Open()) {
120 cerr << __func__ << " Cannot open a file, " << filename_ << endl;
121 return result;
122 }
123
124 if (!ParseMagic()) return result;
125 ParseBody();
126 gcda_file_->Close();
127 return result;
128 }
129
130 } // namespace vts
131 } // namespace android
132