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llvm-project/llvm/tools/llvm-cov/CoverageReport.cpp

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//===- CoverageReport.cpp - Code coverage report -------------------------===//
//
// 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 class implements rendering of a code coverage report.
//
//===----------------------------------------------------------------------===//
#include "CoverageReport.h"
#include "RenderingSupport.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ThreadPool.h"
#include "llvm/Support/Threading.h"
#include <numeric>
using namespace llvm;
namespace {
/// Helper struct which prints trimmed and aligned columns.
struct Column {
enum TrimKind { NoTrim, WidthTrim, RightTrim };
enum AlignmentKind { LeftAlignment, RightAlignment };
StringRef Str;
unsigned Width;
TrimKind Trim;
AlignmentKind Alignment;
Column(StringRef Str, unsigned Width)
: Str(Str), Width(Width), Trim(WidthTrim), Alignment(LeftAlignment) {}
Column &set(TrimKind Value) {
Trim = Value;
return *this;
}
Column &set(AlignmentKind Value) {
Alignment = Value;
return *this;
}
void render(raw_ostream &OS) const {
if (Str.size() <= Width) {
if (Alignment == RightAlignment) {
OS.indent(Width - Str.size());
OS << Str;
return;
}
OS << Str;
OS.indent(Width - Str.size());
return;
}
switch (Trim) {
case NoTrim:
OS << Str;
break;
case WidthTrim:
OS << Str.substr(0, Width);
break;
case RightTrim:
OS << Str.substr(0, Width - 3) << "...";
break;
}
}
};
raw_ostream &operator<<(raw_ostream &OS, const Column &Value) {
Value.render(OS);
return OS;
}
Column column(StringRef Str, unsigned Width) { return Column(Str, Width); }
template <typename T>
Column column(StringRef Str, unsigned Width, const T &Value) {
return Column(Str, Width).set(Value);
}
// Specify the default column widths.
size_t FileReportColumns[] = {25, 12, 18, 10, 12, 18, 10,
16, 16, 10, 12, 18, 10};
size_t FunctionReportColumns[] = {25, 10, 8, 8, 10, 8, 8};
/// Adjust column widths to fit long file paths and function names.
void adjustColumnWidths(ArrayRef<StringRef> Files,
ArrayRef<StringRef> Functions) {
for (StringRef Filename : Files)
FileReportColumns[0] = std::max(FileReportColumns[0], Filename.size());
for (StringRef Funcname : Functions)
FunctionReportColumns[0] =
std::max(FunctionReportColumns[0], Funcname.size());
}
/// Prints a horizontal divider long enough to cover the given column
/// widths.
void renderDivider(ArrayRef<size_t> ColumnWidths, raw_ostream &OS) {
size_t Length = std::accumulate(ColumnWidths.begin(), ColumnWidths.end(), 0);
for (size_t I = 0; I < Length; ++I)
OS << '-';
}
/// Return the color which correponds to the coverage percentage of a
/// certain metric.
template <typename T>
raw_ostream::Colors determineCoveragePercentageColor(const T &Info) {
if (Info.isFullyCovered())
return raw_ostream::GREEN;
return Info.getPercentCovered() >= 80.0 ? raw_ostream::YELLOW
: raw_ostream::RED;
}
/// Get the number of redundant path components in each path in \p Paths.
unsigned getNumRedundantPathComponents(ArrayRef<std::string> Paths) {
// To start, set the number of redundant path components to the maximum
// possible value.
SmallVector<StringRef, 8> FirstPathComponents{sys::path::begin(Paths[0]),
sys::path::end(Paths[0])};
unsigned NumRedundant = FirstPathComponents.size();
for (unsigned I = 1, E = Paths.size(); NumRedundant > 0 && I < E; ++I) {
StringRef Path = Paths[I];
for (const auto &Component :
enumerate(make_range(sys::path::begin(Path), sys::path::end(Path)))) {
// Do not increase the number of redundant components: that would remove
// useful parts of already-visited paths.
if (Component.index() >= NumRedundant)
break;
// Lower the number of redundant components when there's a mismatch
// between the first path, and the path under consideration.
if (FirstPathComponents[Component.index()] != Component.value()) {
NumRedundant = Component.index();
break;
}
}
}
return NumRedundant;
}
/// Determine the length of the longest redundant prefix of the paths in
/// \p Paths.
unsigned getRedundantPrefixLen(ArrayRef<std::string> Paths) {
// If there's at most one path, no path components are redundant.
if (Paths.size() <= 1)
return 0;
unsigned PrefixLen = 0;
unsigned NumRedundant = getNumRedundantPathComponents(Paths);
auto Component = sys::path::begin(Paths[0]);
for (unsigned I = 0; I < NumRedundant; ++I) {
auto LastComponent = Component;
++Component;
PrefixLen += Component - LastComponent;
}
return PrefixLen;
}
} // end anonymous namespace
namespace llvm {
void CoverageReport::render(const FileCoverageSummary &File,
raw_ostream &OS) const {
auto FileCoverageColor =
determineCoveragePercentageColor(File.RegionCoverage);
auto FuncCoverageColor =
determineCoveragePercentageColor(File.FunctionCoverage);
auto InstantiationCoverageColor =
determineCoveragePercentageColor(File.InstantiationCoverage);
auto LineCoverageColor = determineCoveragePercentageColor(File.LineCoverage);
SmallString<256> FileName = File.Name;
sys::path::remove_dots(FileName, /*remove_dot_dots=*/true);
sys::path::native(FileName);
OS << column(FileName, FileReportColumns[0], Column::NoTrim);
if (Options.ShowRegionSummary) {
OS << format("%*u", FileReportColumns[1],
(unsigned)File.RegionCoverage.getNumRegions());
Options.colored_ostream(OS, FileCoverageColor)
<< format("%*u", FileReportColumns[2],
(unsigned)(File.RegionCoverage.getNumRegions() -
File.RegionCoverage.getCovered()));
if (File.RegionCoverage.getNumRegions())
Options.colored_ostream(OS, FileCoverageColor)
<< format("%*.2f", FileReportColumns[3] - 1,
File.RegionCoverage.getPercentCovered())
<< '%';
else
OS << column("-", FileReportColumns[3], Column::RightAlignment);
}
OS << format("%*u", FileReportColumns[4],
(unsigned)File.FunctionCoverage.getNumFunctions());
OS << format("%*u", FileReportColumns[5],
(unsigned)(File.FunctionCoverage.getNumFunctions() -
File.FunctionCoverage.getExecuted()));
if (File.FunctionCoverage.getNumFunctions())
Options.colored_ostream(OS, FuncCoverageColor)
<< format("%*.2f", FileReportColumns[6] - 1,
File.FunctionCoverage.getPercentCovered())
<< '%';
else
OS << column("-", FileReportColumns[6], Column::RightAlignment);
if (Options.ShowInstantiationSummary) {
OS << format("%*u", FileReportColumns[7],
(unsigned)File.InstantiationCoverage.getNumFunctions());
OS << format("%*u", FileReportColumns[8],
(unsigned)(File.InstantiationCoverage.getNumFunctions() -
File.InstantiationCoverage.getExecuted()));
if (File.InstantiationCoverage.getNumFunctions())
Options.colored_ostream(OS, InstantiationCoverageColor)
<< format("%*.2f", FileReportColumns[9] - 1,
File.InstantiationCoverage.getPercentCovered())
<< '%';
else
OS << column("-", FileReportColumns[9], Column::RightAlignment);
}
OS << format("%*u", FileReportColumns[10],
(unsigned)File.LineCoverage.getNumLines());
Options.colored_ostream(OS, LineCoverageColor) << format(
"%*u", FileReportColumns[11], (unsigned)(File.LineCoverage.getNumLines() -
File.LineCoverage.getCovered()));
if (File.LineCoverage.getNumLines())
Options.colored_ostream(OS, LineCoverageColor)
<< format("%*.2f", FileReportColumns[12] - 1,
File.LineCoverage.getPercentCovered())
<< '%';
else
OS << column("-", FileReportColumns[12], Column::RightAlignment);
OS << "\n";
}
void CoverageReport::render(const FunctionCoverageSummary &Function,
const DemangleCache &DC,
raw_ostream &OS) const {
auto FuncCoverageColor =
determineCoveragePercentageColor(Function.RegionCoverage);
auto LineCoverageColor =
determineCoveragePercentageColor(Function.LineCoverage);
OS << column(DC.demangle(Function.Name), FunctionReportColumns[0],
Column::RightTrim)
<< format("%*u", FunctionReportColumns[1],
(unsigned)Function.RegionCoverage.getNumRegions());
Options.colored_ostream(OS, FuncCoverageColor)
<< format("%*u", FunctionReportColumns[2],
(unsigned)(Function.RegionCoverage.getNumRegions() -
Function.RegionCoverage.getCovered()));
Options.colored_ostream(
OS, determineCoveragePercentageColor(Function.RegionCoverage))
<< format("%*.2f", FunctionReportColumns[3] - 1,
Function.RegionCoverage.getPercentCovered())
<< '%';
OS << format("%*u", FunctionReportColumns[4],
(unsigned)Function.LineCoverage.getNumLines());
Options.colored_ostream(OS, LineCoverageColor)
<< format("%*u", FunctionReportColumns[5],
(unsigned)(Function.LineCoverage.getNumLines() -
Function.LineCoverage.getCovered()));
Options.colored_ostream(
OS, determineCoveragePercentageColor(Function.LineCoverage))
<< format("%*.2f", FunctionReportColumns[6] - 1,
Function.LineCoverage.getPercentCovered())
<< '%';
OS << "\n";
}
void CoverageReport::renderFunctionReports(ArrayRef<std::string> Files,
const DemangleCache &DC,
raw_ostream &OS) {
bool isFirst = true;
for (StringRef Filename : Files) {
auto Functions = Coverage.getCoveredFunctions(Filename);
if (isFirst)
isFirst = false;
else
OS << "\n";
std::vector<StringRef> Funcnames;
for (const auto &F : Functions)
Funcnames.emplace_back(DC.demangle(F.Name));
adjustColumnWidths({}, Funcnames);
OS << "File '" << Filename << "':\n";
OS << column("Name", FunctionReportColumns[0])
<< column("Regions", FunctionReportColumns[1], Column::RightAlignment)
<< column("Miss", FunctionReportColumns[2], Column::RightAlignment)
<< column("Cover", FunctionReportColumns[3], Column::RightAlignment)
<< column("Lines", FunctionReportColumns[4], Column::RightAlignment)
<< column("Miss", FunctionReportColumns[5], Column::RightAlignment)
<< column("Cover", FunctionReportColumns[6], Column::RightAlignment);
OS << "\n";
renderDivider(FunctionReportColumns, OS);
OS << "\n";
FunctionCoverageSummary Totals("TOTAL");
for (const auto &F : Functions) {
auto Function = FunctionCoverageSummary::get(Coverage, F);
++Totals.ExecutionCount;
Totals.RegionCoverage += Function.RegionCoverage;
Totals.LineCoverage += Function.LineCoverage;
render(Function, DC, OS);
}
if (Totals.ExecutionCount) {
renderDivider(FunctionReportColumns, OS);
OS << "\n";
render(Totals, DC, OS);
}
}
}
void CoverageReport::prepareSingleFileReport(const StringRef Filename,
const coverage::CoverageMapping *Coverage,
const CoverageViewOptions &Options, const unsigned LCP,
FileCoverageSummary *FileReport, const CoverageFilter *Filters) {
for (const auto &Group : Coverage->getInstantiationGroups(Filename)) {
std::vector<FunctionCoverageSummary> InstantiationSummaries;
for (const coverage::FunctionRecord *F : Group.getInstantiations()) {
if (!Filters->matches(*Coverage, *F))
continue;
auto InstantiationSummary = FunctionCoverageSummary::get(*Coverage, *F);
FileReport->addInstantiation(InstantiationSummary);
InstantiationSummaries.push_back(InstantiationSummary);
}
if (InstantiationSummaries.empty())
continue;
auto GroupSummary =
FunctionCoverageSummary::get(Group, InstantiationSummaries);
if (Options.Debug)
outs() << "InstantiationGroup: " << GroupSummary.Name << " with "
<< "size = " << Group.size() << "\n";
FileReport->addFunction(GroupSummary);
}
}
std::vector<FileCoverageSummary> CoverageReport::prepareFileReports(
const coverage::CoverageMapping &Coverage, FileCoverageSummary &Totals,
ArrayRef<std::string> Files, const CoverageViewOptions &Options,
const CoverageFilter &Filters) {
unsigned LCP = getRedundantPrefixLen(Files);
auto NumThreads = Options.NumThreads;
// If NumThreads is not specified, auto-detect a good default.
if (NumThreads == 0)
NumThreads = Files.size();
ThreadPool Pool(heavyweight_hardware_concurrency(NumThreads));
std::vector<FileCoverageSummary> FileReports;
FileReports.reserve(Files.size());
for (StringRef Filename : Files) {
FileReports.emplace_back(Filename.drop_front(LCP));
Pool.async(&CoverageReport::prepareSingleFileReport, Filename,
&Coverage, Options, LCP, &FileReports.back(), &Filters);
}
Pool.wait();
for (const auto &FileReport : FileReports)
Totals += FileReport;
return FileReports;
}
void CoverageReport::renderFileReports(
raw_ostream &OS, const CoverageFilters &IgnoreFilenameFilters) const {
std::vector<std::string> UniqueSourceFiles;
for (StringRef SF : Coverage.getUniqueSourceFiles()) {
// Apply ignore source files filters.
if (!IgnoreFilenameFilters.matchesFilename(SF))
UniqueSourceFiles.emplace_back(SF.str());
}
renderFileReports(OS, UniqueSourceFiles);
}
void CoverageReport::renderFileReports(
raw_ostream &OS, ArrayRef<std::string> Files) const {
renderFileReports(OS, Files, CoverageFiltersMatchAll());
}
void CoverageReport::renderFileReports(
raw_ostream &OS, ArrayRef<std::string> Files,
const CoverageFiltersMatchAll &Filters) const {
FileCoverageSummary Totals("TOTAL");
auto FileReports =
prepareFileReports(Coverage, Totals, Files, Options, Filters);
std::vector<StringRef> Filenames;
for (const FileCoverageSummary &FCS : FileReports)
Filenames.emplace_back(FCS.Name);
adjustColumnWidths(Filenames, {});
OS << column("Filename", FileReportColumns[0]);
if (Options.ShowRegionSummary)
OS << column("Regions", FileReportColumns[1], Column::RightAlignment)
<< column("Missed Regions", FileReportColumns[2], Column::RightAlignment)
<< column("Cover", FileReportColumns[3], Column::RightAlignment);
OS << column("Functions", FileReportColumns[4], Column::RightAlignment)
<< column("Missed Functions", FileReportColumns[5], Column::RightAlignment)
<< column("Executed", FileReportColumns[6], Column::RightAlignment);
if (Options.ShowInstantiationSummary)
OS << column("Instantiations", FileReportColumns[7], Column::RightAlignment)
<< column("Missed Insts.", FileReportColumns[8], Column::RightAlignment)
<< column("Executed", FileReportColumns[9], Column::RightAlignment);
OS << column("Lines", FileReportColumns[10], Column::RightAlignment)
<< column("Missed Lines", FileReportColumns[11], Column::RightAlignment)
<< column("Cover", FileReportColumns[12], Column::RightAlignment) << "\n";
renderDivider(FileReportColumns, OS);
OS << "\n";
bool EmptyFiles = false;
for (const FileCoverageSummary &FCS : FileReports) {
if (FCS.FunctionCoverage.getNumFunctions())
render(FCS, OS);
else
EmptyFiles = true;
}
if (EmptyFiles && Filters.empty()) {
OS << "\n"
<< "Files which contain no functions:\n";
for (const FileCoverageSummary &FCS : FileReports)
if (!FCS.FunctionCoverage.getNumFunctions())
render(FCS, OS);
}
renderDivider(FileReportColumns, OS);
OS << "\n";
render(Totals, OS);
}
} // end namespace llvm
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