1//===--- Logger.cpp - Logger interface for clangd -------------------------===//
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 "support/Logger.h"
10#include "support/Trace.h"
11#include "llvm/Support/Chrono.h"
12#include "llvm/Support/Error.h"
13#include "llvm/Support/FormatVariadic.h"
14#include "llvm/Support/raw_ostream.h"
15#include <mutex>
16
17namespace clang {
18namespace clangd {
19
20namespace {
21Logger *L = nullptr;
22} // namespace
23
24LoggingSession::LoggingSession(clangd::Logger &Instance) {
25 assert(!L);
26 L = &Instance;
27}
28
29LoggingSession::~LoggingSession() { L = nullptr; }
30
31void detail::logImpl(Logger::Level Level, const char *Fmt,
32 const llvm::formatv_object_base &Message) {
33 if (L)
34 L->log(Level, Fmt, Message);
35 else {
36 static std::mutex Mu;
37 std::lock_guard<std::mutex> Guard(Mu);
38 llvm::errs() << Message << "\n";
39 }
40}
41
42const char *detail::debugType(const char *Filename) {
43 if (const char *Slash = strrchr(s: Filename, c: '/'))
44 return Slash + 1;
45 if (const char *Backslash = strrchr(s: Filename, c: '\\'))
46 return Backslash + 1;
47 return Filename;
48}
49
50void StreamLogger::log(Logger::Level Level, const char *Fmt,
51 const llvm::formatv_object_base &Message) {
52 if (Level < MinLevel)
53 return;
54 llvm::sys::TimePoint<> Timestamp = std::chrono::system_clock::now();
55 trace::log(Name: Message);
56 std::lock_guard<std::mutex> Guard(StreamMutex);
57 Logs << llvm::formatv(Fmt: "{0}[{1:%H:%M:%S.%L}] {2}\n", Vals: indicator(L: Level),
58 Vals&: Timestamp, Vals: Message);
59 Logs.flush();
60}
61
62namespace {
63// Like llvm::StringError but with fewer options and no gratuitous copies.
64class SimpleStringError : public llvm::ErrorInfo<SimpleStringError> {
65 std::error_code EC;
66 std::string Message;
67
68public:
69 SimpleStringError(std::error_code EC, std::string &&Message)
70 : EC(EC), Message(std::move(Message)) {}
71 void log(llvm::raw_ostream &OS) const override { OS << Message; }
72 std::string message() const override { return Message; }
73 std::error_code convertToErrorCode() const override { return EC; }
74 static char ID;
75};
76char SimpleStringError::ID;
77
78} // namespace
79
80llvm::Error detail::error(std::error_code EC, std::string &&Msg) {
81 return llvm::make_error<SimpleStringError>(Args&: EC, Args: std::move(Msg));
82}
83
84} // namespace clangd
85} // namespace clang
86

source code of clang-tools-extra/clangd/support/Logger.cpp