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LcovMerger is a tool that merges all the intermediate lcov tracefiles (with .dat extension) found under a coverage directory and prints the merged tracefile to a given output file. A custom implementation for merging lcov tracefiles is needed because the merging functionality of lcov itself is very slow. LcovMerger is required to get a single coverage report (lcov tracefile) from a bazel coverage command that executes multiple tests. ATM LcovMerger is only invoked by tools/test/collect_coverage.sh that collects and merges the tracefiles from a single test invocation. It will also be used from a CoverageReportAction. Progress on bazelbuild#5246. PiperOrigin-RevId: 200054506
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106 changes: 106 additions & 0 deletions
106
tools/test/LcovMerger/java/com/google/devtools/lcovmerger/BUILD
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| package( | ||
| default_visibility = [ | ||
| "//tools/test/LcovMerger/javatests/com/google/devtools/lcovmerger:__pkg__", | ||
| ], | ||
| ) | ||
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| licenses(["notice"]) # Apache 2.0 | ||
|
|
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| java_library( | ||
| name = "BranchCoverage", | ||
| srcs = ["BranchCoverage.java"], | ||
| deps = [ | ||
| "//third_party:auto_value", | ||
| ], | ||
| ) | ||
|
|
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| java_library( | ||
| name = "LineCoverage", | ||
| srcs = ["LineCoverage.java"], | ||
| deps = [ | ||
| "//third_party:auto_value", | ||
| "//third_party:jsr305", | ||
| ], | ||
| ) | ||
|
|
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| java_library( | ||
| name = "SourceFileCoverage", | ||
| srcs = ["SourceFileCoverage.java"], | ||
| deps = [ | ||
| ":BranchCoverage", | ||
| ":LineCoverage", | ||
| "//third_party:auto_value", | ||
| "//third_party:guava", | ||
| "//third_party:jsr305", | ||
| ], | ||
| ) | ||
|
|
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| java_library( | ||
| name = "LcovPrinter", | ||
| srcs = ["LcovPrinter.java"], | ||
| deps = [ | ||
| ":BranchCoverage", | ||
| ":Coverage", | ||
| ":LcovConstants", | ||
| ":LineCoverage", | ||
| ":SourceFileCoverage", | ||
| "//third_party:guava", | ||
| ], | ||
| ) | ||
|
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| java_library( | ||
| name = "LcovConstants", | ||
| srcs = ["LcovConstants.java"], | ||
| ) | ||
|
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| java_library( | ||
| name = "LcovParser", | ||
| srcs = ["LcovParser.java"], | ||
| deps = [ | ||
| ":BranchCoverage", | ||
| ":LcovConstants", | ||
| ":LineCoverage", | ||
| ":SourceFileCoverage", | ||
| ], | ||
| ) | ||
|
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| java_library( | ||
| name = "Coverage", | ||
| srcs = ["Coverage.java"], | ||
| deps = [":SourceFileCoverage"], | ||
| ) | ||
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| java_library( | ||
| name = "MainLibrary", | ||
| srcs = ["Main.java"], | ||
| deps = [ | ||
| ":Coverage", | ||
| ":LcovConstants", | ||
| ":LcovParser", | ||
| ":LcovPrinter", | ||
| ":SourceFileCoverage", | ||
| "//third_party:guava", | ||
| ], | ||
| ) | ||
|
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| java_binary( | ||
| name = "Main", | ||
| srcs = ["Main.java"], | ||
| main_class = "com.google.devtools.lcovmerger.Main", | ||
| visibility = ["//visibility:public"], | ||
| deps = [ | ||
| ":Coverage", | ||
| ":LcovConstants", | ||
| ":LcovParser", | ||
| ":LcovPrinter", | ||
| ":MainLibrary", | ||
| ":SourceFileCoverage", | ||
| "//third_party:guava", | ||
| ], | ||
| ) | ||
|
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| filegroup( | ||
| name = "srcs", | ||
| srcs = glob(["**"]), | ||
| visibility = ["//visibility:public"], | ||
| ) |
57 changes: 57 additions & 0 deletions
57
tools/test/LcovMerger/java/com/google/devtools/lcovmerger/BranchCoverage.java
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| // Copyright 2018 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.lcovmerger; | ||
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| import com.google.auto.value.AutoValue; | ||
|
|
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| /** | ||
| * Stores branch coverage information. | ||
| */ | ||
| @AutoValue | ||
| abstract class BranchCoverage { | ||
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| static BranchCoverage create( | ||
| int lineNumber, int blockNumber, int branchNumber, boolean wasExecuted, int nrOfExecutions) { | ||
| assert (wasExecuted && nrOfExecutions > 0) || (!wasExecuted && nrOfExecutions == 0); | ||
| return new AutoValue_BranchCoverage( | ||
| lineNumber, blockNumber, branchNumber, wasExecuted, nrOfExecutions); | ||
| } | ||
|
|
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| /** | ||
| * Merges two given instances of {@link BranchCoverage}. | ||
| * | ||
| * Calling {@code lineNumber()}, {@code blockNumber()} and {@code branchNumber()} must return the | ||
| * same values for {@code first} and {@code second}. | ||
| */ | ||
| static BranchCoverage merge(BranchCoverage first, BranchCoverage second) { | ||
| assert first.lineNumber() == second.lineNumber(); | ||
| assert first.blockNumber() == second.blockNumber(); | ||
| assert first.branchNumber() == second.branchNumber(); | ||
|
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| return create( | ||
| first.lineNumber(), | ||
| first.blockNumber(), | ||
| first.branchNumber(), | ||
| first.wasExecuted() || second.wasExecuted(), | ||
| first.nrOfExecutions() + second.nrOfExecutions()); | ||
| } | ||
|
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| abstract int lineNumber(); | ||
| // The two numbers below should be -1 for non-gcc emitted coverage (e.g. Java). | ||
| abstract int blockNumber(); // internal gcc internal ID for the branch | ||
| abstract int branchNumber(); // internal gcc internal ID for the branch | ||
| abstract boolean wasExecuted(); | ||
| abstract int nrOfExecutions(); | ||
| } |
40 changes: 40 additions & 0 deletions
40
tools/test/LcovMerger/java/com/google/devtools/lcovmerger/Coverage.java
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| // Copyright 2018 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.lcovmerger; | ||
|
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| import java.util.Collection; | ||
| import java.util.TreeMap; | ||
|
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| class Coverage { | ||
| private final TreeMap<String, SourceFileCoverage> sourceFiles; | ||
|
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| Coverage() { | ||
| sourceFiles = new TreeMap<>(); | ||
| } | ||
|
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| void add(SourceFileCoverage input) { | ||
| String sourceFilename = input.sourceFileName(); | ||
| if (sourceFiles.containsKey(sourceFilename)) { | ||
| SourceFileCoverage old = sourceFiles.get(sourceFilename); | ||
| sourceFiles.put(sourceFilename, SourceFileCoverage.merge(old, input)); | ||
| } else { | ||
| sourceFiles.put(sourceFilename, input); | ||
| } | ||
| } | ||
|
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| Collection<SourceFileCoverage> getAllSourceFiles() { | ||
| return sourceFiles.values(); | ||
| } | ||
| } |
38 changes: 38 additions & 0 deletions
38
tools/test/LcovMerger/java/com/google/devtools/lcovmerger/LcovConstants.java
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| @@ -0,0 +1,38 @@ | ||
| // Copyright 2018 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.lcovmerger; | ||
|
|
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| /** | ||
| * Stores markers used by the lcov tracefile. See | ||
| * <a href="http://ltp.sourceforge.net/coverage/lcov/geninfo.1.php"> lcov documentation</a> | ||
| */ | ||
| class LcovConstants { | ||
| static final String SF_MARKER = "SF:"; | ||
| static final String FN_MARKER = "FN:"; | ||
| static final String FNDA_MARKER = "FNDA:"; | ||
| static final String FNF_MARKER = "FNF:"; | ||
| static final String FNH_MARKER = "FNH:"; | ||
| static final String BRDA_MARKER = "BRDA:"; | ||
| static final String BA_MARKER = "BA:"; | ||
| static final String BRF_MARKER = "BRF:"; | ||
| static final String BRH_MARKER = "BRH:"; | ||
| static final String DA_MARKER = "DA:"; | ||
| static final String LH_MARKER = "LH:"; | ||
| static final String LF_MARKER = "LF:"; | ||
| static final String END_OF_RECORD_MARKER = "end_of_record"; | ||
| static final String LCOV_DELIMITER = ","; | ||
| static final String TAKEN = "-"; | ||
| static final String TRACEFILE_EXTENSION = ".dat"; | ||
| } |
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