1//===--- ClangTidyProfiling.cpp - clang-tidy --------------------*- C++ -*-===//
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#include "ClangTidyProfiling.h"
10#include "llvm/ADT/SmallString.h"
11#include "llvm/Support/FileSystem.h"
12#include "llvm/Support/Path.h"
13#include "llvm/Support/raw_ostream.h"
14#include <optional>
15#include <system_error>
16#include <utility>
17
18#define DEBUG_TYPE "clang-tidy-profiling"
19
20namespace clang::tidy {
21
22ClangTidyProfiling::StorageParams::StorageParams(llvm::StringRef ProfilePrefix,
23 llvm::StringRef SourceFile)
24 : Timestamp(std::chrono::system_clock::now()), SourceFilename(SourceFile) {
25 llvm::SmallString<32> TimestampStr;
26 llvm::raw_svector_ostream OS(TimestampStr);
27 llvm::format_provider<decltype(Timestamp)>::format(TP: Timestamp, OS,
28 Style: "%Y%m%d%H%M%S%N");
29
30 llvm::SmallString<256> FinalPrefix(ProfilePrefix);
31 llvm::sys::path::append(path&: FinalPrefix, a: TimestampStr);
32
33 // So the full output name is: /ProfilePrefix/timestamp-inputfilename.json
34 StoreFilename = llvm::Twine(FinalPrefix + "-" +
35 llvm::sys::path::filename(path: SourceFile) + ".json")
36 .str();
37}
38
39void ClangTidyProfiling::printUserFriendlyTable(llvm::raw_ostream &OS) {
40 TG->print(OS);
41 OS.flush();
42}
43
44void ClangTidyProfiling::printAsJSON(llvm::raw_ostream &OS) {
45 OS << "{\n";
46 OS << R"("file": ")" << Storage->SourceFilename << "\",\n";
47 OS << R"("timestamp": ")" << Storage->Timestamp << "\",\n";
48 OS << "\"profile\": {\n";
49 TG->printJSONValues(OS, delim: "");
50 OS << "\n}\n";
51 OS << "}\n";
52 OS.flush();
53}
54
55void ClangTidyProfiling::storeProfileData() {
56 assert(Storage && "We should have a filename.");
57
58 llvm::SmallString<256> OutputDirectory(Storage->StoreFilename);
59 llvm::sys::path::remove_filename(path&: OutputDirectory);
60 if (std::error_code EC = llvm::sys::fs::create_directories(path: OutputDirectory)) {
61 llvm::errs() << "Unable to create output directory '" << OutputDirectory
62 << "': " << EC.message() << "\n";
63 return;
64 }
65
66 std::error_code EC;
67 llvm::raw_fd_ostream OS(Storage->StoreFilename, EC, llvm::sys::fs::OF_None);
68 if (EC) {
69 llvm::errs() << "Error opening output file '" << Storage->StoreFilename
70 << "': " << EC.message() << "\n";
71 return;
72 }
73
74 printAsJSON(OS);
75}
76
77ClangTidyProfiling::ClangTidyProfiling(std::optional<StorageParams> Storage)
78 : Storage(std::move(Storage)) {}
79
80ClangTidyProfiling::~ClangTidyProfiling() {
81 TG.emplace(args: "clang-tidy", args: "clang-tidy checks profiling", args&: Records);
82
83 if (!Storage)
84 printUserFriendlyTable(OS&: llvm::errs());
85 else
86 storeProfileData();
87}
88
89} // namespace clang::tidy
90

source code of clang-tools-extra/clang-tidy/ClangTidyProfiling.cpp