[Commands] Add a (currently empty) `stats` command.

This one will be used to print statistics about lldb sessions
(including, e.g. number of expression evaluation succeeded or
failed). I decided to commit the skeleton first so that we have
a clean reference on how a command should be implemented.
My future commits are going to populate this command and test
it.

<rdar://problem/36555975>

llvm-svn: 328378

3 files changed, 56 insertions, 0 deletions

diff --git a/lldb/source/Commands/CMakeLists.txt b/lldb/source/Commands/CMakeLists.txt
index f0199eb4cf4..1dbaab5174e 100644
--- a/lldb/source/Commands/CMakeLists.txt
+++ b/lldb/source/Commands/CMakeLists.txt
@@ -20,6 +20,7 @@ add_lldb_library(lldbCommands
   CommandObjectRegister.cpp
   CommandObjectSettings.cpp
   CommandObjectSource.cpp
+  CommandObjectStats.cpp
   CommandObjectTarget.cpp
   CommandObjectThread.cpp
   CommandObjectType.cpp
diff --git a/lldb/source/Commands/CommandObjectStats.cpp b/lldb/source/Commands/CommandObjectStats.cpp
new file mode 100644
index 00000000000..84a8a6c376f
--- /dev/null
+++ b/lldb/source/Commands/CommandObjectStats.cpp
@@ -0,0 +1,28 @@
+//===-- CommandObjectStats.cpp ----------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CommandObjectStats.h"
+#include "lldb/Host/Host.h"
+#include "lldb/Interpreter/CommandInterpreter.h"
+#include "lldb/Interpreter/CommandReturnObject.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+CommandObjectStats::CommandObjectStats(CommandInterpreter &interpreter)
+    : CommandObjectParsed(
+          interpreter, "stats", "Print statistics about a debugging session",
+          nullptr) {
+}
+
+bool CommandObjectStats::DoExecute(Args &command, CommandReturnObject &result) {
+  return true;
+}
+
+CommandObjectStats::~CommandObjectStats() {}
diff --git a/lldb/source/Commands/CommandObjectStats.h b/lldb/source/Commands/CommandObjectStats.h
new file mode 100644
index 00000000000..b71fac4613c
--- /dev/null
+++ b/lldb/source/Commands/CommandObjectStats.h
@@ -0,0 +1,27 @@
+//===-- CommandObjectStats.h ------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_CommandObjectStats_h_
+#define liblldb_CommandObjectStats_h_
+
+#include "lldb/Interpreter/CommandObject.h"
+
+namespace lldb_private {
+class CommandObjectStats : public CommandObjectParsed {
+public:
+  CommandObjectStats(CommandInterpreter &interpreter);
+
+  ~CommandObjectStats() override;
+
+protected:
+  bool DoExecute(Args &command, CommandReturnObject &result) override;
+};
+} // namespace lldb_private
+
+#endif // liblldb_CommandObjectLanguage_h_