source/Commands/CommandObjectPlugin.cpp

//===-- CommandObjectPlugin.cpp ---------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "CommandObjectPlugin.h"
#include "lldb/Host/Host.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"

using namespace lldb;
using namespace lldb_private;

class CommandObjectPluginLoad : public CommandObjectParsed {
public:
  CommandObjectPluginLoad(CommandInterpreter &interpreter)
      : CommandObjectParsed(interpreter, "plugin load",
                            "Import a dylib that implements an LLDB plugin.",
                            nullptr) {
    CommandArgumentEntry arg1;
    CommandArgumentData cmd_arg;

    // Define the first (and only) variant of this arg.
    cmd_arg.arg_type = eArgTypeFilename;
    cmd_arg.arg_repetition = eArgRepeatPlain;

    // There is only one variant this argument could be; put it into the
    // argument entry.
    arg1.push_back(cmd_arg);

    // Push the data for the first argument into the m_arguments vector.
    m_arguments.push_back(arg1);
  }

  ~CommandObjectPluginLoad() override = default;

  int HandleArgumentCompletion(Args &input, int &cursor_index,
                               int &cursor_char_position,
                               OptionElementVector &opt_element_vector,
                               int match_start_point, int max_return_elements,
                               bool &word_complete,
                               StringList &matches) override {
    auto completion_str = input[cursor_index].ref;
    completion_str = completion_str.take_front(cursor_char_position);

    CommandCompletions::InvokeCommonCompletionCallbacks(
        GetCommandInterpreter(), CommandCompletions::eDiskFileCompletion,
        completion_str, match_start_point, max_return_elements, nullptr,
        word_complete, matches);
    return matches.GetSize();
  }

protected:
  bool DoExecute(Args &command, CommandReturnObject &result) override {
    size_t argc = command.GetArgumentCount();

    if (argc != 1) {
      result.AppendError("'plugin load' requires one argument");
      result.SetStatus(eReturnStatusFailed);
      return false;
    }

    Status error;

    FileSpec dylib_fspec(command[0].ref, true);

    if (m_interpreter.GetDebugger().LoadPlugin(dylib_fspec, error))
      result.SetStatus(eReturnStatusSuccessFinishResult);
    else {
      result.AppendError(error.AsCString());
      result.SetStatus(eReturnStatusFailed);
    }

    return result.Succeeded();
  }
};

CommandObjectPlugin::CommandObjectPlugin(CommandInterpreter &interpreter)
    : CommandObjectMultiword(interpreter, "plugin",
                             "Commands for managing LLDB plugins.",
                             "plugin <subcommand> [<subcommand-options>]") {
  LoadSubCommand("load",
                 CommandObjectSP(new CommandObjectPluginLoad(interpreter)));
}

CommandObjectPlugin::~CommandObjectPlugin() = default;