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Fix GCC 9 Code coverage by adding its JSON format
GCC 9 changed the intermediate format to a JSON based format and with it changed the meaning of the `-i` flag. Because of these changes it was not possible to generate code coverage with GCC 9. This patch addresses that by adding its format in parallel to the existing GCov parser Addresses: bazelbuild#9406
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121
...erageOutputGenerator/java/com/google/devtools/coverageoutputgenerator/GcovJsonParser.java
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| // 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. | ||
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| package com.google.devtools.coverageoutputgenerator; | ||
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| import java.io.BufferedReader; | ||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
| import java.util.zip.GZIPInputStream; | ||
| import com.google.gson.Gson; | ||
| import com.google.gson.annotations.SerializedName; | ||
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| /** | ||
| * 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/Invoking-gcov.html">gcov documentation</a>. | ||
| */ | ||
| public class GcovJsonParser { | ||
| private static final Logger logger = Logger.getLogger(GcovParser.class.getName()); | ||
| private final InputStream inputStream; | ||
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| private GcovJsonParser(InputStream inputStream) { | ||
| this.inputStream = inputStream; | ||
| } | ||
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| public static List<SourceFileCoverage> parse(InputStream inputStream) throws IOException { | ||
| return new GcovJsonParser(inputStream).parse(); | ||
| } | ||
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| 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(); | ||
| //logger.log(Level.INFO, contents.toString()); | ||
| 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)); | ||
| for (GcovJsonBranch branch : line.branches) { | ||
| currentFileCoverage.addBranch(line.line_number, BranchCoverage.create(line.line_number, branch.count)); | ||
| } | ||
| } | ||
| allSourceFiles.add(currentFileCoverage); | ||
| } | ||
| } | ||
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| return allSourceFiles; | ||
| } | ||
| } | ||
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| // Classes for the Gson data mapper representing the structure of the GCov JSON format | ||
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| class GcovJsonFormat { | ||
| String gcc_version; | ||
| GcovJsonFile[] files; | ||
| String format_version; | ||
| String current_working_directory; | ||
| String data_file; | ||
| } | ||
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| class GcovJsonFile { | ||
| String file; | ||
| GcovJsonFunction[] functions; | ||
| GcovJsonLine[] lines; | ||
| } | ||
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| class GcovJsonFunction { | ||
| int blocks; | ||
| int end_column; | ||
| int start_line; | ||
| String name; | ||
| int blocks_executed; | ||
| int execution_count; | ||
| String demangled_name; | ||
| int start_column; | ||
| int end_line; | ||
| } | ||
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| class GcovJsonLine { | ||
| GcovJsonBranch[] branches; | ||
| int count; | ||
| int line_number; | ||
| boolean unexecuted_block; | ||
| String function_name; | ||
| } | ||
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| class GcovJsonBranch { | ||
| boolean fallthrough; | ||
| int count; | ||
| @SerializedName("throw") | ||
| boolean _throw; | ||
| } |
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