handle Ctrl+C to stop a running process

[llunak]

Summary

This is essentially the same as IOHandlerEditline::Interrupt(), minus the editline stuff.

lldb/include/lldb/Interpreter/CommandInterpreter.h

public:
   /// disk, \b false otherwise.
   bool SaveTranscript(CommandReturnObject &result,
                       llvm::Optional<std::string> output_file = llvm::None);
 
   FileSpec GetCurrentSourceDir();
 
   bool IsInteractive();
 
+  bool IOHandlerInterrupt(IOHandler &io_handler) override;
+
 protected:
   friend class Debugger;
 
   // IOHandlerDelegate functions
   void IOHandlerInputComplete(IOHandler &io_handler,
                               std::string &line) override;
 
   ConstString IOHandlerGetControlSequence(char ch) override {
     if (ch == 'd')
       return ConstString("quit\n");
     return ConstString();
   }
 
-  bool IOHandlerInterrupt(IOHandler &io_handler) override;
-
   void GetProcessOutput();
 
   bool DidProcessStopAbnormally() const;
 
   void SetSynchronous(bool value);
 
   lldb::CommandObjectSP GetCommandSP(llvm::StringRef cmd,
                                      bool include_aliases = true,

lldb/source/Core/IOHandlerCursesGUI.cpp

void IOHandlerCursesGUI::Run() {
   m_app_ap->Run(m_debugger);
   SetIsDone(true);
 }
 
 IOHandlerCursesGUI::~IOHandlerCursesGUI() = default;
 
 void IOHandlerCursesGUI::Cancel() {}
 
-bool IOHandlerCursesGUI::Interrupt() { return false; }
+bool IOHandlerCursesGUI::Interrupt() {
+  return m_debugger.GetCommandInterpreter().IOHandlerInterrupt(*this);
+}
 
 void IOHandlerCursesGUI::GotEOF() {}
 
 void IOHandlerCursesGUI::TerminalSizeChanged() {
   m_app_ap->TerminalSizeChanged();
 }
 
 #endif // LLDB_ENABLE_CURSES