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//===- CoverageExporterLcov.cpp - Code coverage export --------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements export of code coverage data to lcov trace file format.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
//
// The trace file code coverage export follows the following format (see also
// https://linux.die.net/man/1/geninfo). Each quoted string appears on its own
// line; the indentation shown here is only for documentation purposes.
//
// - for each source file:
// - "SF:<absolute path to source file>"
// - for each function:
// - "FN:<line number of function start>,<function name>"
// - for each function:
// - "FNDA:<execution count>,<function name>"
// - "FNF:<number of functions found>"
// - "FNH:<number of functions hit>"
// - for each instrumented line:
// - "DA:<line number>,<execution count>[,<checksum>]
// - "LH:<number of lines with non-zero execution count>"
// - "LF:<nubmer of instrumented lines>"
// - "end_of_record"
//
// If the user is exporting summary information only, then the FN, FNDA, and DA
// lines will not be present.
//
//===----------------------------------------------------------------------===//
#include "CoverageExporterLcov.h"
#include "CoverageReport.h"
using namespace llvm;
namespace {
void renderFunctionSummary(raw_ostream &OS,
const FileCoverageSummary &Summary) {
OS << "FNF:" << Summary.FunctionCoverage.getNumFunctions() << '\n'
<< "FNH:" << Summary.FunctionCoverage.getExecuted() << '\n';
}
void renderFunctions(
raw_ostream &OS,
const iterator_range<coverage::FunctionRecordIterator> &Functions) {
for (const auto &F : Functions) {
auto StartLine = F.CountedRegions.front().LineStart;
OS << "FN:" << StartLine << ',' << F.Name << '\n';
}
for (const auto &F : Functions)
OS << "FNDA:" << F.ExecutionCount << ',' << F.Name << '\n';
}
void renderLineExecutionCounts(raw_ostream &OS,
const coverage::CoverageData &FileCoverage) {
coverage::LineCoverageIterator LCI{FileCoverage, 1};
coverage::LineCoverageIterator LCIEnd = LCI.getEnd();
for (; LCI != LCIEnd; ++LCI) {
const coverage::LineCoverageStats &LCS = *LCI;
if (LCS.isMapped()) {
OS << "DA:" << LCS.getLine() << ',' << LCS.getExecutionCount() << '\n';
}
}
}
void renderLineSummary(raw_ostream &OS, const FileCoverageSummary &Summary) {
OS << "LF:" << Summary.LineCoverage.getNumLines() << '\n'
<< "LH:" << Summary.LineCoverage.getCovered() << '\n';
}
void renderFile(raw_ostream &OS, const coverage::CoverageMapping &Coverage,
const std::string &Filename,
const FileCoverageSummary &FileReport, bool ExportSummaryOnly) {
OS << "SF:" << Filename << '\n';
if (!ExportSummaryOnly) {
renderFunctions(OS, Coverage.getCoveredFunctions());
}
renderFunctionSummary(OS, FileReport);
if (!ExportSummaryOnly) {
// Calculate and render detailed coverage information for given file.
auto FileCoverage = Coverage.getCoverageForFile(Filename);
renderLineExecutionCounts(OS, FileCoverage);
}
renderLineSummary(OS, FileReport);
OS << "end_of_record\n";
}
void renderFiles(raw_ostream &OS, const coverage::CoverageMapping &Coverage,
ArrayRef<std::string> SourceFiles,
ArrayRef<FileCoverageSummary> FileReports,
bool ExportSummaryOnly) {
for (unsigned I = 0, E = SourceFiles.size(); I < E; ++I)
renderFile(OS, Coverage, SourceFiles[I], FileReports[I], ExportSummaryOnly);
}
} // end anonymous namespace
void CoverageExporterLcov::renderRoot(const CoverageFilters &IgnoreFilters) {
std::vector<std::string> SourceFiles;
for (StringRef SF : Coverage.getUniqueSourceFiles()) {
if (!IgnoreFilters.matchesFilename(SF))
SourceFiles.emplace_back(SF);
}
renderRoot(SourceFiles);
}
void CoverageExporterLcov::renderRoot(ArrayRef<std::string> SourceFiles) {
FileCoverageSummary Totals = FileCoverageSummary("Totals");
auto FileReports = CoverageReport::prepareFileReports(Coverage, Totals,
SourceFiles, Options);
renderFiles(OS, Coverage, SourceFiles, FileReports,
Options.ExportSummaryOnly);
}
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