1 //===- ListWarnings.h - diagtool tool for printing warning flags ----------===//
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 // This file provides a diagtool tool that displays warning flags for
11 // diagnostics.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "DiagTool.h"
16 #include "DiagnosticNames.h"
17 #include "clang/AST/ASTDiagnostic.h"
18 #include "clang/Basic/AllDiagnostics.h"
19 #include "clang/Basic/Diagnostic.h"
20 #include "llvm/ADT/StringMap.h"
21 #include "llvm/Support/Format.h"
22
23 DEF_DIAGTOOL("list-warnings",
24 "List warnings and their corresponding flags",
25 ListWarnings)
26
27 using namespace clang;
28 using namespace diagtool;
29
30 namespace {
31 struct Entry {
32 llvm::StringRef DiagName;
33 llvm::StringRef Flag;
34
Entry__anon12bd5f5d0111::Entry35 Entry(llvm::StringRef diagN, llvm::StringRef flag)
36 : DiagName(diagN), Flag(flag) {}
37
operator <__anon12bd5f5d0111::Entry38 bool operator<(const Entry &x) const { return DiagName < x.DiagName; }
39 };
40 }
41
printEntries(std::vector<Entry> & entries,llvm::raw_ostream & out)42 static void printEntries(std::vector<Entry> &entries, llvm::raw_ostream &out) {
43 for (std::vector<Entry>::iterator it = entries.begin(), ei = entries.end();
44 it != ei; ++it) {
45 out << " " << it->DiagName;
46 if (!it->Flag.empty())
47 out << " [-W" << it->Flag << "]";
48 out << '\n';
49 }
50 }
51
run(unsigned int argc,char ** argv,llvm::raw_ostream & out)52 int ListWarnings::run(unsigned int argc, char **argv, llvm::raw_ostream &out) {
53 std::vector<Entry> Flagged, Unflagged;
54 llvm::StringMap<std::vector<unsigned> > flagHistogram;
55
56 ArrayRef<DiagnosticRecord> AllDiagnostics = getBuiltinDiagnosticsByName();
57
58 for (ArrayRef<DiagnosticRecord>::iterator di = AllDiagnostics.begin(),
59 de = AllDiagnostics.end();
60 di != de; ++di) {
61 unsigned diagID = di->DiagID;
62
63 if (DiagnosticIDs::isBuiltinNote(diagID))
64 continue;
65
66 if (!DiagnosticIDs::isBuiltinWarningOrExtension(diagID))
67 continue;
68
69 Entry entry(di->getName(),
70 DiagnosticIDs::getWarningOptionForDiag(diagID));
71
72 if (entry.Flag.empty())
73 Unflagged.push_back(entry);
74 else {
75 Flagged.push_back(entry);
76 flagHistogram[entry.Flag].push_back(diagID);
77 }
78 }
79
80 out << "Warnings with flags (" << Flagged.size() << "):\n";
81 printEntries(Flagged, out);
82
83 out << "Warnings without flags (" << Unflagged.size() << "):\n";
84 printEntries(Unflagged, out);
85
86 out << "\nSTATISTICS:\n\n";
87
88 double percentFlagged = ((double) Flagged.size())
89 / (Flagged.size() + Unflagged.size()) * 100.0;
90
91 out << " Percentage of warnings with flags: "
92 << llvm::format("%.4g",percentFlagged) << "%\n";
93
94 out << " Number of unique flags: "
95 << flagHistogram.size() << '\n';
96
97 double avgDiagsPerFlag = (double) Flagged.size() / flagHistogram.size();
98 out << " Average number of diagnostics per flag: "
99 << llvm::format("%.4g", avgDiagsPerFlag) << '\n';
100
101 out << " Number in -Wpedantic (not covered by other -W flags): "
102 << flagHistogram["pedantic"].size() << '\n';
103
104 out << '\n';
105
106 return 0;
107 }
108
109