82 lines · cpp
1//===-- LLDBServerUtilities.cpp ---------------------------------*- 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-exception6//7//===----------------------------------------------------------------------===//8 9#include "LLDBServerUtilities.h"10 11#include "lldb/Utility/Args.h"12#include "lldb/Utility/Log.h"13#include "lldb/Utility/StreamString.h"14 15#include "llvm/ADT/SmallVector.h"16#include "llvm/ADT/StringRef.h"17#include "llvm/Support/FileSystem.h"18 19using namespace lldb;20using namespace lldb_private::lldb_server;21using namespace lldb_private;22using namespace llvm;23 24class TestLogHandler : public LogHandler {25public:26 TestLogHandler(std::shared_ptr<llvm::raw_ostream> stream_sp)27 : m_stream_sp(stream_sp) {}28 29 void Emit(llvm::StringRef message) override {30 std::lock_guard<std::mutex> guard(m_mutex);31 (*m_stream_sp) << message;32 m_stream_sp->flush();33 }34 35private:36 std::mutex m_mutex;37 std::shared_ptr<raw_ostream> m_stream_sp;38};39 40static std::shared_ptr<TestLogHandler> GetLogStream(StringRef log_file) {41 if (!log_file.empty()) {42 std::error_code EC;43 auto stream_sp = std::make_shared<raw_fd_ostream>(44 log_file, EC, sys::fs::OF_TextWithCRLF | sys::fs::OF_Append);45 if (!EC)46 return std::make_shared<TestLogHandler>(stream_sp);47 errs() << llvm::formatv(48 "Failed to open log file `{0}`: {1}\nWill log to stderr instead.\n",49 log_file, EC.message());50 }51 // No need to delete the stderr stream.52 return std::make_shared<TestLogHandler>(53 std::shared_ptr<raw_ostream>(&errs(), [](raw_ostream *) {}));54}55 56bool LLDBServerUtilities::SetupLogging(const std::string &log_file,57 const StringRef &log_channels,58 uint32_t log_options) {59 60 auto log_stream_sp = GetLogStream(log_file);61 62 SmallVector<StringRef, 32> channel_array;63 log_channels.split(channel_array, ":", /*MaxSplit*/ -1, /*KeepEmpty*/ false);64 for (auto channel_with_categories : channel_array) {65 std::string error;66 llvm::raw_string_ostream error_stream(error);67 Args channel_then_categories(channel_with_categories);68 std::string channel(channel_then_categories.GetArgumentAtIndex(0));69 channel_then_categories.Shift(); // Shift off the channel70 71 bool success = Log::EnableLogChannel(72 log_stream_sp, log_options, channel,73 channel_then_categories.GetArgumentArrayRef(), error_stream);74 if (!success) {75 errs() << formatv("Unable to setup logging for channel \"{0}\": {1}",76 channel, error);77 return false;78 }79 }80 return true;81}82