contrib/llvm/tools/lldb/tools/lldb-server/LLDBServerUtilities.cpp

   1 //===-- LLDBServerUtilities.cpp ---------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "LLDBServerUtilities.h"
  11
  12 #include "lldb/Core/StreamFile.h"
  13 #include "lldb/Utility/Args.h"
  14 #include "lldb/Utility/Log.h"
  15 #include "lldb/Utility/StreamString.h"
  16
  17 #include "llvm/ADT/SmallVector.h"
  18 #include "llvm/ADT/StringRef.h"
  19 #include "llvm/Support/FileSystem.h"
  20
  21 using namespace lldb;
  22 using namespace lldb_private::lldb_server;
  23 using namespace llvm;
  24
  25 static std::shared_ptr<raw_ostream> GetLogStream(StringRef log_file) {
  26   if (!log_file.empty()) {
  27     std::error_code EC;
  28     std::shared_ptr<raw_ostream> stream_sp = std::make_shared<raw_fd_ostream>(
  29         log_file, EC, sys::fs::F_Text | sys::fs::F_Append);
  30     if (!EC)
  31       return stream_sp;
  32     errs() << llvm::formatv(
  33         "Failed to open log file `{0}`: {1}\nWill log to stderr instead.\n",
  34         log_file, EC.message());
  35   }
  36   // No need to delete the stderr stream.
  37   return std::shared_ptr<raw_ostream>(&errs(), [](raw_ostream *) {});
  38 }
  39
  40 bool LLDBServerUtilities::SetupLogging(const std::string &log_file,
  41                                        const StringRef &log_channels,
  42                                        uint32_t log_options) {
  43
  44   auto log_stream_sp = GetLogStream(log_file);
  45
  46   SmallVector<StringRef, 32> channel_array;
  47   log_channels.split(channel_array, ":", /*MaxSplit*/ -1, /*KeepEmpty*/ false);
  48   for (auto channel_with_categories : channel_array) {
  49     std::string error;
  50     llvm::raw_string_ostream error_stream(error);
  51     Args channel_then_categories(channel_with_categories);
  52     std::string channel(channel_then_categories.GetArgumentAtIndex(0));
  53     channel_then_categories.Shift(); // Shift off the channel
  54
  55     bool success = Log::EnableLogChannel(
  56         log_stream_sp, log_options, channel,
  57         channel_then_categories.GetArgumentArrayRef(), error_stream);
  58     if (!success) {
  59       errs() << formatv("Unable to setup logging for channel \"{0}\": {1}",
  60                         channel, error_stream.str());
  61       return false;
  62     }
  63   }
  64   return true;
  65 }