1 files changed, 63 insertions, 0 deletions
diff --git a/lldb/tools/lldb-server/LLDBServerUtilities.cpp b/lldb/tools/lldb-server/LLDBServerUtilities.cpp
new file mode 100644
index 000000000000..7f9271e36b68
--- /dev/null
+++ b/lldb/tools/lldb-server/LLDBServerUtilities.cpp
@@ -0,0 +1,63 @@
+//===-- LLDBServerUtilities.cpp ---------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "LLDBServerUtilities.h"
+
+#include "lldb/Utility/Args.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/StreamString.h"
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/FileSystem.h"
+
+using namespace lldb;
+using namespace lldb_private::lldb_server;
+using namespace llvm;
+
+static std::shared_ptr<raw_ostream> GetLogStream(StringRef log_file) {
+  if (!log_file.empty()) {
+    std::error_code EC;
+    std::shared_ptr<raw_ostream> stream_sp = std::make_shared<raw_fd_ostream>(
+        log_file, EC, sys::fs::OF_Text | sys::fs::OF_Append);
+    if (!EC)
+      return stream_sp;
+    errs() << llvm::formatv(
+        "Failed to open log file `{0}`: {1}\nWill log to stderr instead.\n",
+        log_file, EC.message());
+  }
+  // No need to delete the stderr stream.
+  return std::shared_ptr<raw_ostream>(&errs(), [](raw_ostream *) {});
+}
+
+bool LLDBServerUtilities::SetupLogging(const std::string &log_file,
+                                       const StringRef &log_channels,
+                                       uint32_t log_options) {
+
+  auto log_stream_sp = GetLogStream(log_file);
+
+  SmallVector<StringRef, 32> channel_array;
+  log_channels.split(channel_array, ":", /*MaxSplit*/ -1, /*KeepEmpty*/ false);
+  for (auto channel_with_categories : channel_array) {
+    std::string error;
+    llvm::raw_string_ostream error_stream(error);
+    Args channel_then_categories(channel_with_categories);
+    std::string channel(channel_then_categories.GetArgumentAtIndex(0));
+    channel_then_categories.Shift(); // Shift off the channel
+
+    bool success = Log::EnableLogChannel(
+        log_stream_sp, log_options, channel,
+        channel_then_categories.GetArgumentArrayRef(), error_stream);
+    if (!success) {
+      errs() << formatv("Unable to setup logging for channel \"{0}\": {1}",
+                        channel, error_stream.str());
+      return false;
+    }
+  }
+  return true;
+}