Fixed the command line LLDB so that "CTRL+C" will interrupt a running process again.

llvm-svn: 202086

lldb/include/lldb/Core/IOHandler.h

@@ -63,6 +63,16 @@ namespace lldb_private {
         virtual void
         Refresh () = 0;
 
+        // Called when an input reader should relinquish its control so another
+        // can be pushed onto the IO handler stack, or so the current IO
+        // handler can pop itself off the stack
+
+        virtual void
+        Cancel () = 0;
+
+        // Called when CTRL+C is pressed which usually causes
+        // Debugger::DispatchInputInterrupt to be called.
+        
         virtual void
         Interrupt () = 0;
         
@@ -394,6 +404,9 @@ namespace lldb_private {
         virtual void
         Refresh ();
 
+        virtual void
+        Cancel ();
+
         virtual void
         Interrupt ();
         
@@ -501,6 +514,9 @@ namespace lldb_private {
         virtual void
         Refresh ();
 
+        virtual void
+        Cancel ();
+
         virtual void
         Interrupt ();
         

lldb/source/Core/Debugger.cpp

@@ -846,7 +846,7 @@ Debugger::ClearIOHandlers ()
         {
             m_input_reader_stack.Pop();
             reader_sp->SetIsDone(true);
-            reader_sp->Interrupt();
+            reader_sp->Cancel();
         }
     }
 }

lldb/source/Core/IOHandler.cpp

@@ -587,6 +587,13 @@ IOHandlerEditline::Refresh ()
     }
 }
 
+void
+IOHandlerEditline::Cancel ()
+{
+    if (m_editline_ap)
+        m_editline_ap->Interrupt ();
+}
+
 void
 IOHandlerEditline::Interrupt ()
 {
@@ -5279,6 +5286,10 @@ IOHandlerCursesGUI::Refresh ()
 {
 }
 
+void
+IOHandlerCursesGUI::Cancel ()
+{
+}
 
 void
 IOHandlerCursesGUI::Interrupt ()

lldb/source/Interpreter/ScriptInterpreterPython.cpp

@@ -782,6 +782,12 @@ public:
         
     }
 
+    virtual void
+    Cancel ()
+    {
+        
+    }
+
     virtual void
     Interrupt ()
     {

lldb/source/Target/Process.cpp

@@ -4824,14 +4824,22 @@ public:
     {
         
     }
+    
     virtual void
-    Interrupt ()
+    Cancel ()
     {
         size_t n = 1;
         char ch = 'q';
         m_pipe_write.Write (&ch, n);
     }
 
+    virtual void
+    Interrupt ()
+    {
+        if (StateIsRunningState(m_process->GetState()))
+            m_process->Halt();
+    }
+    
     virtual void
     GotEOF()
     {
@@ -4859,7 +4867,7 @@ Process::CancelWatchForSTDIN (bool exited)
     {
         if (exited)
             m_process_input_reader->SetIsDone(true);
-        m_process_input_reader->Interrupt();
+        m_process_input_reader->Cancel();
     }
 }
 
@@ -4903,7 +4911,7 @@ Process::PopProcessIOHandler ()
     IOHandlerSP io_handler_sp (m_process_input_reader);
     if (io_handler_sp)
     {
-        io_handler_sp->Interrupt();
+        io_handler_sp->Cancel();
         m_target.GetDebugger().PopIOHandler (io_handler_sp);
     }
 }