1//===- gcov.cpp - GCOV compatible LLVM coverage tool ----------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// llvm-cov is a command line tools to analyze and report coverage information.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/ProfileData/GCOV.h"
14#include "llvm/ADT/SmallString.h"
15#include "llvm/Support/CommandLine.h"
16#include "llvm/Support/Errc.h"
17#include "llvm/Support/FileSystem.h"
18#include "llvm/Support/Path.h"
19#include <system_error>
20using namespace llvm;
21
22static void reportCoverage(StringRef SourceFile, StringRef ObjectDir,
23 const std::string &InputGCNO,
24 const std::string &InputGCDA, bool DumpGCOV,
25 const GCOV::Options &Options) {
26 SmallString<128> CoverageFileStem(ObjectDir);
27 if (CoverageFileStem.empty()) {
28 // If no directory was specified with -o, look next to the source file.
29 CoverageFileStem = sys::path::parent_path(path: SourceFile);
30 sys::path::append(path&: CoverageFileStem, a: sys::path::stem(path: SourceFile));
31 } else if (sys::fs::is_directory(Path: ObjectDir))
32 // A directory name was given. Use it and the source file name.
33 sys::path::append(path&: CoverageFileStem, a: sys::path::stem(path: SourceFile));
34 else
35 // A file was given. Ignore the source file and look next to this file.
36 sys::path::replace_extension(path&: CoverageFileStem, extension: "");
37
38 std::string GCNO =
39 InputGCNO.empty() ? std::string(CoverageFileStem) + ".gcno" : InputGCNO;
40 std::string GCDA =
41 InputGCDA.empty() ? std::string(CoverageFileStem) + ".gcda" : InputGCDA;
42 GCOVFile GF;
43
44 // Open .gcda and .gcda without requiring a NUL terminator. The concurrent
45 // modification may nullify the NUL terminator condition.
46 ErrorOr<std::unique_ptr<MemoryBuffer>> GCNO_Buff =
47 MemoryBuffer::getFileOrSTDIN(Filename: GCNO, /*IsText=*/false,
48 /*RequiresNullTerminator=*/false);
49 if (std::error_code EC = GCNO_Buff.getError()) {
50 errs() << GCNO << ": " << EC.message() << "\n";
51 return;
52 }
53 GCOVBuffer GCNO_GB(GCNO_Buff.get().get());
54 if (!GF.readGCNO(Buffer&: GCNO_GB)) {
55 errs() << "Invalid .gcno File!\n";
56 return;
57 }
58
59 ErrorOr<std::unique_ptr<MemoryBuffer>> GCDA_Buff =
60 MemoryBuffer::getFileOrSTDIN(Filename: GCDA, /*IsText=*/false,
61 /*RequiresNullTerminator=*/false);
62 if (std::error_code EC = GCDA_Buff.getError()) {
63 if (EC != errc::no_such_file_or_directory) {
64 errs() << GCDA << ": " << EC.message() << "\n";
65 return;
66 }
67 // Clear the filename to make it clear we didn't read anything.
68 GCDA = "-";
69 } else {
70 GCOVBuffer gcda_buf(GCDA_Buff.get().get());
71 if (!gcda_buf.readGCDAFormat())
72 errs() << GCDA << ":not a gcov data file\n";
73 else if (!GF.readGCDA(Buffer&: gcda_buf))
74 errs() << "Invalid .gcda File!\n";
75 }
76
77 if (DumpGCOV)
78 GF.print(OS&: errs());
79
80 gcovOneInput(options: Options, filename: SourceFile, gcno: GCNO, gcda: GCDA, file&: GF);
81}
82
83int gcovMain(int argc, const char *argv[]) {
84 cl::list<std::string> SourceFiles(cl::Positional, cl::OneOrMore,
85 cl::desc("SOURCEFILE"));
86
87 cl::opt<bool> AllBlocks("a", cl::Grouping, cl::init(Val: false),
88 cl::desc("Display all basic blocks"));
89 cl::alias AllBlocksA("all-blocks", cl::aliasopt(AllBlocks));
90
91 cl::opt<bool> BranchProb("b", cl::Grouping, cl::init(Val: false),
92 cl::desc("Display branch probabilities"));
93 cl::alias BranchProbA("branch-probabilities", cl::aliasopt(BranchProb));
94
95 cl::opt<bool> BranchCount("c", cl::Grouping, cl::init(Val: false),
96 cl::desc("Display branch counts instead "
97 "of percentages (requires -b)"));
98 cl::alias BranchCountA("branch-counts", cl::aliasopt(BranchCount));
99
100 cl::opt<bool> LongNames("l", cl::Grouping, cl::init(Val: false),
101 cl::desc("Prefix filenames with the main file"));
102 cl::alias LongNamesA("long-file-names", cl::aliasopt(LongNames));
103
104 cl::opt<bool> FuncSummary("f", cl::Grouping, cl::init(Val: false),
105 cl::desc("Show coverage for each function"));
106 cl::alias FuncSummaryA("function-summaries", cl::aliasopt(FuncSummary));
107
108 // Supported by gcov 4.9~8. gcov 9 (GCC r265587) removed --intermediate-format
109 // and -i was changed to mean --json-format. We consider this format still
110 // useful and support -i.
111 cl::opt<bool> Intermediate(
112 "intermediate-format", cl::init(Val: false),
113 cl::desc("Output .gcov in intermediate text format"));
114 cl::alias IntermediateA("i", cl::desc("Alias for --intermediate-format"),
115 cl::Grouping, cl::NotHidden,
116 cl::aliasopt(Intermediate));
117
118 cl::opt<bool> Demangle("demangled-names", cl::init(Val: false),
119 cl::desc("Demangle function names"));
120 cl::alias DemangleA("m", cl::desc("Alias for --demangled-names"),
121 cl::Grouping, cl::NotHidden, cl::aliasopt(Demangle));
122
123 cl::opt<bool> NoOutput("n", cl::Grouping, cl::init(Val: false),
124 cl::desc("Do not output any .gcov files"));
125 cl::alias NoOutputA("no-output", cl::aliasopt(NoOutput));
126
127 cl::opt<std::string> ObjectDir(
128 "o", cl::value_desc("DIR|FILE"), cl::init(Val: ""),
129 cl::desc("Find objects in DIR or based on FILE's path"));
130 cl::alias ObjectDirA("object-directory", cl::aliasopt(ObjectDir));
131 cl::alias ObjectDirB("object-file", cl::aliasopt(ObjectDir));
132
133 cl::opt<bool> PreservePaths("p", cl::Grouping, cl::init(Val: false),
134 cl::desc("Preserve path components"));
135 cl::alias PreservePathsA("preserve-paths", cl::aliasopt(PreservePaths));
136
137 cl::opt<bool> RelativeOnly(
138 "r", cl::Grouping,
139 cl::desc("Only dump files with relative paths or absolute paths with the "
140 "prefix specified by -s"));
141 cl::alias RelativeOnlyA("relative-only", cl::aliasopt(RelativeOnly));
142 cl::opt<std::string> SourcePrefix("s", cl::desc("Source prefix to elide"));
143 cl::alias SourcePrefixA("source-prefix", cl::aliasopt(SourcePrefix));
144
145 cl::opt<bool> UseStdout("t", cl::Grouping, cl::init(Val: false),
146 cl::desc("Print to stdout"));
147 cl::alias UseStdoutA("stdout", cl::aliasopt(UseStdout));
148
149 cl::opt<bool> UncondBranch("u", cl::Grouping, cl::init(Val: false),
150 cl::desc("Display unconditional branch info "
151 "(requires -b)"));
152 cl::alias UncondBranchA("unconditional-branches", cl::aliasopt(UncondBranch));
153
154 cl::opt<bool> HashFilenames("x", cl::Grouping, cl::init(Val: false),
155 cl::desc("Hash long pathnames"));
156 cl::alias HashFilenamesA("hash-filenames", cl::aliasopt(HashFilenames));
157
158
159 cl::OptionCategory DebugCat("Internal and debugging options");
160 cl::opt<bool> DumpGCOV("dump", cl::init(Val: false), cl::cat(DebugCat),
161 cl::desc("Dump the gcov file to stderr"));
162 cl::opt<std::string> InputGCNO("gcno", cl::cat(DebugCat), cl::init(Val: ""),
163 cl::desc("Override inferred gcno file"));
164 cl::opt<std::string> InputGCDA("gcda", cl::cat(DebugCat), cl::init(Val: ""),
165 cl::desc("Override inferred gcda file"));
166
167 cl::ParseCommandLineOptions(argc, argv, Overview: "LLVM code coverage tool\n");
168
169 GCOV::Options Options(AllBlocks, BranchProb, BranchCount, FuncSummary,
170 PreservePaths, UncondBranch, Intermediate, LongNames,
171 Demangle, NoOutput, RelativeOnly, UseStdout,
172 HashFilenames, SourcePrefix);
173
174 for (const auto &SourceFile : SourceFiles)
175 reportCoverage(SourceFile, ObjectDir, InputGCNO, InputGCDA, DumpGCOV,
176 Options);
177 return 0;
178}
179

source code of llvm/tools/llvm-cov/gcov.cpp