1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Copyright 2020 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.coverageoutputgenerator;
import com.google.gson.Gson;
import com.google.gson.annotations.SerializedName;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.GZIPInputStream;
/**
* A {@link Parser} for gcov intermediate json format introduced in GCC 9.1. See the flag {@code
* --intermediate-format} in <a
* href="https://gcc.gnu.org/onlinedocs/gcc-9.3.0/gcc/Invoking-Gcov.html">gcov documentation</a>.
*/
public class GcovJsonParser {
private static final Logger logger = Logger.getLogger(GcovJsonParser.class.getName());
private final InputStream inputStream;
private GcovJsonParser(InputStream inputStream) {
this.inputStream = inputStream;
}
public static List<SourceFileCoverage> parse(InputStream inputStream) throws IOException {
return new GcovJsonParser(inputStream).parse();
}
private List<SourceFileCoverage> parse() throws IOException {
ArrayList<SourceFileCoverage> allSourceFiles = new ArrayList<>();
try (InputStream gzipStream = new GZIPInputStream(inputStream)) {
ByteArrayOutputStream contents = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int length;
while ((length = gzipStream.read(buffer)) != -1) {
contents.write(buffer, 0, length);
}
Gson gson = new Gson();
GcovJsonFormat document = gson.fromJson(contents.toString(), GcovJsonFormat.class);
if (!document.format_version.equals("1")) {
logger.log(
Level.WARNING,
"Expect GCov JSON format version 1, got format version " + document.format_version);
}
for (GcovJsonFile file : document.files) {
SourceFileCoverage currentFileCoverage = new SourceFileCoverage(file.file);
for (GcovJsonFunction function : file.functions) {
currentFileCoverage.addLineNumber(function.name, function.start_line);
currentFileCoverage.addFunctionExecution(function.name, function.execution_count);
}
for (GcovJsonLine line : file.lines) {
currentFileCoverage.addLine(
line.line_number, LineCoverage.create(line.line_number, line.count, null));
int branchNumber = 0;
boolean taken = Arrays.stream(line.branches).anyMatch(b -> b.count > 0);
for (GcovJsonBranch branch : line.branches) {
currentFileCoverage.addBranch(
line.line_number,
BranchCoverage.createWithBranch(
line.line_number, Integer.toString(branchNumber), taken, branch.count));
branchNumber += 1;
}
}
allSourceFiles.add(currentFileCoverage);
}
}
return allSourceFiles;
}
// Classes for the Gson data mapper representing the structure of the GCov JSON format
// These do not follow the Java naming styleguide as they need to match the JSON field names
// Documentation can be found in GCov's manpage, of which the source is available at
// https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/doc/gcov.texi;h=dcdd7831ff063483d43e5347af0b67083c85ecc4;hb=4212a6a3e44f870412d9025eeb323fd4f50a61da#l184
static class GcovJsonFormat {
String gcc_version;
GcovJsonFile[] files;
String format_version;
String current_working_directory;
String data_file;
}
static class GcovJsonFile {
String file;
GcovJsonFunction[] functions;
GcovJsonLine[] lines;
}
static class GcovJsonFunction {
int blocks;
int end_column;
int start_line;
String name;
int blocks_executed;
long execution_count;
String demangled_name;
int start_column;
int end_line;
}
static class GcovJsonLine {
GcovJsonBranch[] branches;
long count;
int line_number;
boolean unexecuted_block;
String function_name;
}
static class GcovJsonBranch {
boolean fallthrough;
long count;
@SerializedName("throw")
boolean _throw;
}
}
|
