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Merge clang 7.0.1 and several follow-up changes
[FreeBSD/FreeBSD.git] / contrib / llvm / tools / llvm-cov / SourceCoverageView.cpp
1 //===- SourceCoverageView.cpp - Code coverage view for source code --------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file This class implements rendering for code coverage of source code.
11 ///
12 //===----------------------------------------------------------------------===//
13
14 #include "SourceCoverageView.h"
15 #include "SourceCoverageViewHTML.h"
16 #include "SourceCoverageViewText.h"
17 #include "llvm/ADT/SmallString.h"
18 #include "llvm/ADT/StringExtras.h"
19 #include "llvm/Support/FileSystem.h"
20 #include "llvm/Support/LineIterator.h"
21 #include "llvm/Support/Path.h"
22
23 using namespace llvm;
24
25 void CoveragePrinter::StreamDestructor::operator()(raw_ostream *OS) const {
26   if (OS == &outs())
27     return;
28   delete OS;
29 }
30
31 std::string CoveragePrinter::getOutputPath(StringRef Path, StringRef Extension,
32                                            bool InToplevel,
33                                            bool Relative) const {
34   assert(Extension.size() && "The file extension may not be empty");
35
36   SmallString<256> FullPath;
37
38   if (!Relative)
39     FullPath.append(Opts.ShowOutputDirectory);
40
41   if (!InToplevel)
42     sys::path::append(FullPath, getCoverageDir());
43
44   SmallString<256> ParentPath = sys::path::parent_path(Path);
45   sys::path::remove_dots(ParentPath, /*remove_dot_dots=*/true);
46   sys::path::append(FullPath, sys::path::relative_path(ParentPath));
47
48   auto PathFilename = (sys::path::filename(Path) + "." + Extension).str();
49   sys::path::append(FullPath, PathFilename);
50   sys::path::native(FullPath);
51
52   return FullPath.str();
53 }
54
55 Expected<CoveragePrinter::OwnedStream>
56 CoveragePrinter::createOutputStream(StringRef Path, StringRef Extension,
57                                     bool InToplevel) const {
58   if (!Opts.hasOutputDirectory())
59     return OwnedStream(&outs());
60
61   std::string FullPath = getOutputPath(Path, Extension, InToplevel, false);
62
63   auto ParentDir = sys::path::parent_path(FullPath);
64   if (auto E = sys::fs::create_directories(ParentDir))
65     return errorCodeToError(E);
66
67   std::error_code E;
68   raw_ostream *RawStream =
69       new raw_fd_ostream(FullPath, E, sys::fs::FA_Read | sys::fs::FA_Write);
70   auto OS = CoveragePrinter::OwnedStream(RawStream);
71   if (E)
72     return errorCodeToError(E);
73   return std::move(OS);
74 }
75
76 std::unique_ptr<CoveragePrinter>
77 CoveragePrinter::create(const CoverageViewOptions &Opts) {
78   switch (Opts.Format) {
79   case CoverageViewOptions::OutputFormat::Text:
80     return llvm::make_unique<CoveragePrinterText>(Opts);
81   case CoverageViewOptions::OutputFormat::HTML:
82     return llvm::make_unique<CoveragePrinterHTML>(Opts);
83   }
84   llvm_unreachable("Unknown coverage output format!");
85 }
86
87 unsigned SourceCoverageView::getFirstUncoveredLineNo() {
88   const auto MinSegIt = find_if(CoverageInfo, [](const CoverageSegment &S) {
89     return S.HasCount && S.Count == 0;
90   });
91
92   // There is no uncovered line, return zero.
93   if (MinSegIt == CoverageInfo.end())
94     return 0;
95
96   return (*MinSegIt).Line;
97 }
98
99 std::string SourceCoverageView::formatCount(uint64_t N) {
100   std::string Number = utostr(N);
101   int Len = Number.size();
102   if (Len <= 3)
103     return Number;
104   int IntLen = Len % 3 == 0 ? 3 : Len % 3;
105   std::string Result(Number.data(), IntLen);
106   if (IntLen != 3) {
107     Result.push_back('.');
108     Result += Number.substr(IntLen, 3 - IntLen);
109   }
110   Result.push_back(" kMGTPEZY"[(Len - 1) / 3]);
111   return Result;
112 }
113
114 bool SourceCoverageView::shouldRenderRegionMarkers(
115     const LineCoverageStats &LCS) const {
116   if (!getOptions().ShowRegionMarkers)
117     return false;
118
119   CoverageSegmentArray Segments = LCS.getLineSegments();
120   if (Segments.empty())
121     return false;
122   for (unsigned I = 0, E = Segments.size() - 1; I < E; ++I) {
123     const auto *CurSeg = Segments[I];
124     if (!CurSeg->IsRegionEntry || CurSeg->Count == LCS.getExecutionCount())
125       continue;
126     return true;
127   }
128   return false;
129 }
130
131 bool SourceCoverageView::hasSubViews() const {
132   return !ExpansionSubViews.empty() || !InstantiationSubViews.empty();
133 }
134
135 std::unique_ptr<SourceCoverageView>
136 SourceCoverageView::create(StringRef SourceName, const MemoryBuffer &File,
137                            const CoverageViewOptions &Options,
138                            CoverageData &&CoverageInfo) {
139   switch (Options.Format) {
140   case CoverageViewOptions::OutputFormat::Text:
141     return llvm::make_unique<SourceCoverageViewText>(
142         SourceName, File, Options, std::move(CoverageInfo));
143   case CoverageViewOptions::OutputFormat::HTML:
144     return llvm::make_unique<SourceCoverageViewHTML>(
145         SourceName, File, Options, std::move(CoverageInfo));
146   }
147   llvm_unreachable("Unknown coverage output format!");
148 }
149
150 std::string SourceCoverageView::getSourceName() const {
151   SmallString<128> SourceText(SourceName);
152   sys::path::remove_dots(SourceText, /*remove_dot_dots=*/true);
153   sys::path::native(SourceText);
154   return SourceText.str();
155 }
156
157 void SourceCoverageView::addExpansion(
158     const CounterMappingRegion &Region,
159     std::unique_ptr<SourceCoverageView> View) {
160   ExpansionSubViews.emplace_back(Region, std::move(View));
161 }
162
163 void SourceCoverageView::addInstantiation(
164     StringRef FunctionName, unsigned Line,
165     std::unique_ptr<SourceCoverageView> View) {
166   InstantiationSubViews.emplace_back(FunctionName, Line, std::move(View));
167 }
168
169 void SourceCoverageView::print(raw_ostream &OS, bool WholeFile,
170                                bool ShowSourceName, bool ShowTitle,
171                                unsigned ViewDepth) {
172   if (ShowTitle)
173     renderTitle(OS, "Coverage Report");
174
175   renderViewHeader(OS);
176
177   if (ShowSourceName)
178     renderSourceName(OS, WholeFile);
179
180   renderTableHeader(OS, (ViewDepth > 0) ? 0 : getFirstUncoveredLineNo(),
181                     ViewDepth);
182
183   // We need the expansions and instantiations sorted so we can go through them
184   // while we iterate lines.
185   std::stable_sort(ExpansionSubViews.begin(), ExpansionSubViews.end());
186   std::stable_sort(InstantiationSubViews.begin(), InstantiationSubViews.end());
187   auto NextESV = ExpansionSubViews.begin();
188   auto EndESV = ExpansionSubViews.end();
189   auto NextISV = InstantiationSubViews.begin();
190   auto EndISV = InstantiationSubViews.end();
191
192   // Get the coverage information for the file.
193   auto StartSegment = CoverageInfo.begin();
194   auto EndSegment = CoverageInfo.end();
195   LineCoverageIterator LCI{CoverageInfo, 1};
196   LineCoverageIterator LCIEnd = LCI.getEnd();
197
198   unsigned FirstLine = StartSegment != EndSegment ? StartSegment->Line : 0;
199   for (line_iterator LI(File, /*SkipBlanks=*/false); !LI.is_at_eof();
200        ++LI, ++LCI) {
201     // If we aren't rendering the whole file, we need to filter out the prologue
202     // and epilogue.
203     if (!WholeFile) {
204       if (LCI == LCIEnd)
205         break;
206       else if (LI.line_number() < FirstLine)
207         continue;
208     }
209
210     renderLinePrefix(OS, ViewDepth);
211     if (getOptions().ShowLineNumbers)
212       renderLineNumberColumn(OS, LI.line_number());
213
214     if (getOptions().ShowLineStats)
215       renderLineCoverageColumn(OS, *LCI);
216
217     // If there are expansion subviews, we want to highlight the first one.
218     unsigned ExpansionColumn = 0;
219     if (NextESV != EndESV && NextESV->getLine() == LI.line_number() &&
220         getOptions().Colors)
221       ExpansionColumn = NextESV->getStartCol();
222
223     // Display the source code for the current line.
224     renderLine(OS, {*LI, LI.line_number()}, *LCI, ExpansionColumn, ViewDepth);
225
226     // Show the region markers.
227     if (shouldRenderRegionMarkers(*LCI))
228       renderRegionMarkers(OS, *LCI, ViewDepth);
229
230     // Show the expansions and instantiations for this line.
231     bool RenderedSubView = false;
232     for (; NextESV != EndESV && NextESV->getLine() == LI.line_number();
233          ++NextESV) {
234       renderViewDivider(OS, ViewDepth + 1);
235
236       // Re-render the current line and highlight the expansion range for
237       // this subview.
238       if (RenderedSubView) {
239         ExpansionColumn = NextESV->getStartCol();
240         renderExpansionSite(OS, {*LI, LI.line_number()}, *LCI, ExpansionColumn,
241                             ViewDepth);
242         renderViewDivider(OS, ViewDepth + 1);
243       }
244
245       renderExpansionView(OS, *NextESV, ViewDepth + 1);
246       RenderedSubView = true;
247     }
248     for (; NextISV != EndISV && NextISV->Line == LI.line_number(); ++NextISV) {
249       renderViewDivider(OS, ViewDepth + 1);
250       renderInstantiationView(OS, *NextISV, ViewDepth + 1);
251       RenderedSubView = true;
252     }
253     if (RenderedSubView)
254       renderViewDivider(OS, ViewDepth + 1);
255     renderLineSuffix(OS, ViewDepth);
256   }
257
258   renderViewFooter(OS);
259 }