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
17 namespace clang {
18 namespace clangd {
19
20 namespace {
21 Logger *L = nullptr;
22 } // namespace
23
LoggingSession(clangd::Logger & Instance)24 LoggingSession::LoggingSession(clangd::Logger &Instance) {
25 assert(!L);
26 L = &Instance;
27 }
28
~LoggingSession()29 LoggingSession::~LoggingSession() { L = nullptr; }
30
logImpl(Logger::Level Level,const char * Fmt,const llvm::formatv_object_base & Message)31 void 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
debugType(const char * Filename)42 const char *detail::debugType(const char *Filename) {
43 if (const char *Slash = strrchr(Filename, '/'))
44 return Slash + 1;
45 if (const char *Backslash = strrchr(Filename, '\\'))
46 return Backslash + 1;
47 return Filename;
48 }
49
log(Logger::Level Level,const char * Fmt,const llvm::formatv_object_base & Message)50 void 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(Message);
56 std::lock_guard<std::mutex> Guard(StreamMutex);
57 Logs << llvm::formatv("{0}[{1:%H:%M:%S.%L}] {2}\n", indicator(Level),
58 Timestamp, Message);
59 Logs.flush();
60 }
61
62 namespace {
63 // Like llvm::StringError but with fewer options and no gratuitous copies.
64 class SimpleStringError : public llvm::ErrorInfo<SimpleStringError> {
65 std::error_code EC;
66 std::string Message;
67
68 public:
SimpleStringError(std::error_code EC,std::string && Message)69 SimpleStringError(std::error_code EC, std::string &&Message)
70 : EC(EC), Message(std::move(Message)) {}
log(llvm::raw_ostream & OS) const71 void log(llvm::raw_ostream &OS) const override { OS << Message; }
message() const72 std::string message() const override { return Message; }
convertToErrorCode() const73 std::error_code convertToErrorCode() const override { return EC; }
74 static char ID;
75 };
76 char SimpleStringError::ID;
77
78 } // namespace
79
error(std::error_code EC,std::string && Msg)80 llvm::Error detail::error(std::error_code EC, std::string &&Msg) {
81 return llvm::make_error<SimpleStringError>(EC, std::move(Msg));
82 }
83
84 } // namespace clangd
85 } // namespace clang
86