[lldb] Create a way to force remove commands

Some LLDB set ups need to hide certain commands for security reasons, so I'm adding a flag that allows removing non-user commands.

Differential Revision: https://reviews.llvm.org/D149312

Author: walter erquinigo

lldb/include/lldb/Interpreter/CommandInterpreter.h

@@ -324,8 +324,9 @@ class CommandInterpreter : public Broadcaster,
                          lldb::CommandObjectSP &command_obj_sp,
                          llvm::StringRef args_string = llvm::StringRef());
 
-  // Remove a command if it is removable (python or regex command)
-  bool RemoveCommand(llvm::StringRef cmd);
+  /// Remove a command if it is removable (python or regex command). If \b force
+  /// is provided, the command is removed regardless of its removable status.
+  bool RemoveCommand(llvm::StringRef cmd, bool force = false);
 
   bool RemoveAlias(llvm::StringRef alias_name);
 

lldb/source/Interpreter/CommandInterpreter.cpp

@@ -1374,11 +1374,12 @@ bool CommandInterpreter::RemoveAlias(llvm::StringRef alias_name) {
   return false;
 }
 
-bool CommandInterpreter::RemoveCommand(llvm::StringRef cmd) {
+bool CommandInterpreter::RemoveCommand(llvm::StringRef cmd, bool force) {
   auto pos = m_command_dict.find(std::string(cmd));
   if (pos != m_command_dict.end()) {
-    if (pos->second->IsRemovable()) {
-      // Only regular expression objects or python commands are removable
+    if (force || pos->second->IsRemovable()) {
+      // Only regular expression objects or python commands are removable under
+      // normal circumstances.
       m_command_dict.erase(pos);
       return true;
     }