LLDBServerUtilities.cpp revision 360784 
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-exception
6//
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 llvm;
22
23static std::shared_ptr<raw_ostream> GetLogStream(StringRef log_file) {
24  if (!log_file.empty()) {
25    std::error_code EC;
26    std::shared_ptr<raw_ostream> stream_sp = std::make_shared<raw_fd_ostream>(
27        log_file, EC, sys::fs::OF_Text | sys::fs::OF_Append);
28    if (!EC)
29      return stream_sp;
30    errs() << llvm::formatv(
31        "Failed to open log file `{0}`: {1}\nWill log to stderr instead.\n",
32        log_file, EC.message());
33  }
34  // No need to delete the stderr stream.
35  return std::shared_ptr<raw_ostream>(&errs(), [](raw_ostream *) {});
36}
37
38bool LLDBServerUtilities::SetupLogging(const std::string &log_file,
39                                       const StringRef &log_channels,
40                                       uint32_t log_options) {
41
42  auto log_stream_sp = GetLogStream(log_file);
43
44  SmallVector<StringRef, 32> channel_array;
45  log_channels.split(channel_array, ":", /*MaxSplit*/ -1, /*KeepEmpty*/ false);
46  for (auto channel_with_categories : channel_array) {
47    std::string error;
48    llvm::raw_string_ostream error_stream(error);
49    Args channel_then_categories(channel_with_categories);
50    std::string channel(channel_then_categories.GetArgumentAtIndex(0));
51    channel_then_categories.Shift(); // Shift off the channel
52
53    bool success = Log::EnableLogChannel(
54        log_stream_sp, log_options, channel,
55        channel_then_categories.GetArgumentArrayRef(), error_stream);
56    if (!success) {
57      errs() << formatv("Unable to setup logging for channel \"{0}\": {1}",
58                        channel, error_stream.str());
59      return false;
60    }
61  }
62  return true;
63}
64