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external/llvm/tools/llvm-cov/SourceCoverageView.cpp
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258
external/llvm/tools/llvm-cov/SourceCoverageView.cpp
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//===- SourceCoverageView.cpp - Code coverage view for source code --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file This class implements rendering for code coverage of source code.
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///
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//===----------------------------------------------------------------------===//
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#include "SourceCoverageView.h"
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#include "SourceCoverageViewHTML.h"
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#include "SourceCoverageViewText.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/LineIterator.h"
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#include "llvm/Support/Path.h"
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using namespace llvm;
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void CoveragePrinter::StreamDestructor::operator()(raw_ostream *OS) const {
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if (OS == &outs())
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return;
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delete OS;
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}
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std::string CoveragePrinter::getOutputPath(StringRef Path, StringRef Extension,
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bool InToplevel,
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bool Relative) const {
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assert(Extension.size() && "The file extension may not be empty");
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SmallString<256> FullPath;
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if (!Relative)
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FullPath.append(Opts.ShowOutputDirectory);
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if (!InToplevel)
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sys::path::append(FullPath, getCoverageDir());
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SmallString<256> ParentPath = sys::path::parent_path(Path);
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sys::path::remove_dots(ParentPath, /*remove_dot_dots=*/true);
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sys::path::append(FullPath, sys::path::relative_path(ParentPath));
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auto PathFilename = (sys::path::filename(Path) + "." + Extension).str();
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sys::path::append(FullPath, PathFilename);
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sys::path::native(FullPath);
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return FullPath.str();
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}
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Expected<CoveragePrinter::OwnedStream>
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CoveragePrinter::createOutputStream(StringRef Path, StringRef Extension,
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bool InToplevel) const {
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if (!Opts.hasOutputDirectory())
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return OwnedStream(&outs());
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std::string FullPath = getOutputPath(Path, Extension, InToplevel, false);
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auto ParentDir = sys::path::parent_path(FullPath);
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if (auto E = sys::fs::create_directories(ParentDir))
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return errorCodeToError(E);
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std::error_code E;
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raw_ostream *RawStream = new raw_fd_ostream(FullPath, E, sys::fs::F_RW);
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auto OS = CoveragePrinter::OwnedStream(RawStream);
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if (E)
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return errorCodeToError(E);
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return std::move(OS);
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}
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std::unique_ptr<CoveragePrinter>
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CoveragePrinter::create(const CoverageViewOptions &Opts) {
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switch (Opts.Format) {
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case CoverageViewOptions::OutputFormat::Text:
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return llvm::make_unique<CoveragePrinterText>(Opts);
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case CoverageViewOptions::OutputFormat::HTML:
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return llvm::make_unique<CoveragePrinterHTML>(Opts);
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}
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llvm_unreachable("Unknown coverage output format!");
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}
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unsigned SourceCoverageView::getFirstUncoveredLineNo() {
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const auto MinSegIt = find_if(CoverageInfo, [](const CoverageSegment &S) {
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return S.HasCount && S.Count == 0;
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});
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// There is no uncovered line, return zero.
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if (MinSegIt == CoverageInfo.end())
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return 0;
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return (*MinSegIt).Line;
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}
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std::string SourceCoverageView::formatCount(uint64_t N) {
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std::string Number = utostr(N);
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int Len = Number.size();
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if (Len <= 3)
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return Number;
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int IntLen = Len % 3 == 0 ? 3 : Len % 3;
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std::string Result(Number.data(), IntLen);
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if (IntLen != 3) {
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Result.push_back('.');
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Result += Number.substr(IntLen, 3 - IntLen);
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}
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Result.push_back(" kMGTPEZY"[(Len - 1) / 3]);
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return Result;
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}
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bool SourceCoverageView::shouldRenderRegionMarkers(
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const LineCoverageStats &LCS) const {
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if (!getOptions().ShowRegionMarkers)
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return false;
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CoverageSegmentArray Segments = LCS.getLineSegments();
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if (Segments.empty())
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return false;
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for (unsigned I = 0, E = Segments.size() - 1; I < E; ++I) {
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const auto *CurSeg = Segments[I];
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if (!CurSeg->IsRegionEntry || CurSeg->Count == LCS.getExecutionCount())
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continue;
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return true;
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}
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return false;
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}
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bool SourceCoverageView::hasSubViews() const {
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return !ExpansionSubViews.empty() || !InstantiationSubViews.empty();
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}
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std::unique_ptr<SourceCoverageView>
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SourceCoverageView::create(StringRef SourceName, const MemoryBuffer &File,
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const CoverageViewOptions &Options,
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CoverageData &&CoverageInfo) {
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switch (Options.Format) {
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case CoverageViewOptions::OutputFormat::Text:
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return llvm::make_unique<SourceCoverageViewText>(
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SourceName, File, Options, std::move(CoverageInfo));
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case CoverageViewOptions::OutputFormat::HTML:
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return llvm::make_unique<SourceCoverageViewHTML>(
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SourceName, File, Options, std::move(CoverageInfo));
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}
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llvm_unreachable("Unknown coverage output format!");
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}
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std::string SourceCoverageView::getSourceName() const {
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SmallString<128> SourceText(SourceName);
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sys::path::remove_dots(SourceText, /*remove_dot_dots=*/true);
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sys::path::native(SourceText);
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return SourceText.str();
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}
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void SourceCoverageView::addExpansion(
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const CounterMappingRegion &Region,
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std::unique_ptr<SourceCoverageView> View) {
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ExpansionSubViews.emplace_back(Region, std::move(View));
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}
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void SourceCoverageView::addInstantiation(
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StringRef FunctionName, unsigned Line,
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std::unique_ptr<SourceCoverageView> View) {
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InstantiationSubViews.emplace_back(FunctionName, Line, std::move(View));
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}
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void SourceCoverageView::print(raw_ostream &OS, bool WholeFile,
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bool ShowSourceName, bool ShowTitle,
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unsigned ViewDepth) {
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if (ShowTitle)
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renderTitle(OS, "Coverage Report");
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renderViewHeader(OS);
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if (ShowSourceName)
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renderSourceName(OS, WholeFile);
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renderTableHeader(OS, (ViewDepth > 0) ? 0 : getFirstUncoveredLineNo(),
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ViewDepth);
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// We need the expansions and instantiations sorted so we can go through them
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// while we iterate lines.
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std::stable_sort(ExpansionSubViews.begin(), ExpansionSubViews.end());
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std::stable_sort(InstantiationSubViews.begin(), InstantiationSubViews.end());
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auto NextESV = ExpansionSubViews.begin();
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auto EndESV = ExpansionSubViews.end();
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auto NextISV = InstantiationSubViews.begin();
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auto EndISV = InstantiationSubViews.end();
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// Get the coverage information for the file.
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auto StartSegment = CoverageInfo.begin();
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auto EndSegment = CoverageInfo.end();
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LineCoverageIterator LCI{CoverageInfo, 1};
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LineCoverageIterator LCIEnd = LCI.getEnd();
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unsigned FirstLine = StartSegment != EndSegment ? StartSegment->Line : 0;
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for (line_iterator LI(File, /*SkipBlanks=*/false); !LI.is_at_eof();
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++LI, ++LCI) {
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// If we aren't rendering the whole file, we need to filter out the prologue
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// and epilogue.
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if (!WholeFile) {
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if (LCI == LCIEnd)
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break;
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else if (LI.line_number() < FirstLine)
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continue;
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}
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renderLinePrefix(OS, ViewDepth);
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if (getOptions().ShowLineNumbers)
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renderLineNumberColumn(OS, LI.line_number());
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if (getOptions().ShowLineStats)
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renderLineCoverageColumn(OS, *LCI);
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// If there are expansion subviews, we want to highlight the first one.
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unsigned ExpansionColumn = 0;
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if (NextESV != EndESV && NextESV->getLine() == LI.line_number() &&
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getOptions().Colors)
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ExpansionColumn = NextESV->getStartCol();
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// Display the source code for the current line.
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renderLine(OS, {*LI, LI.line_number()}, *LCI, ExpansionColumn, ViewDepth);
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// Show the region markers.
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if (shouldRenderRegionMarkers(*LCI))
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renderRegionMarkers(OS, *LCI, ViewDepth);
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// Show the expansions and instantiations for this line.
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bool RenderedSubView = false;
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for (; NextESV != EndESV && NextESV->getLine() == LI.line_number();
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++NextESV) {
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renderViewDivider(OS, ViewDepth + 1);
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// Re-render the current line and highlight the expansion range for
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// this subview.
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if (RenderedSubView) {
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ExpansionColumn = NextESV->getStartCol();
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renderExpansionSite(OS, {*LI, LI.line_number()}, *LCI, ExpansionColumn,
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ViewDepth);
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renderViewDivider(OS, ViewDepth + 1);
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}
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renderExpansionView(OS, *NextESV, ViewDepth + 1);
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RenderedSubView = true;
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}
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for (; NextISV != EndISV && NextISV->Line == LI.line_number(); ++NextISV) {
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renderViewDivider(OS, ViewDepth + 1);
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renderInstantiationView(OS, *NextISV, ViewDepth + 1);
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RenderedSubView = true;
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}
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if (RenderedSubView)
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renderViewDivider(OS, ViewDepth + 1);
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renderLineSuffix(OS, ViewDepth);
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}
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renderViewFooter(OS);
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}
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