Initial version

code/userprog/progtest.cc

@@ -0,0 +1,106 @@
+// progtest.cc 
+//      Test routines for demonstrating that Nachos can load
+//      a user program and execute it.  
+//
+//      Also, routines for testing the Console hardware device.
+//
+// Copyright (c) 1992-1993 The Regents of the University of California.
+// All rights reserved.  See copyright.h for copyright notice and limitation 
+// of liability and disclaimer of warranty provisions.
+
+#include "copyright.h"
+#include "system.h"
+#include "console.h"
+#include "addrspace.h"
+#include "synch.h"
+
+//----------------------------------------------------------------------
+// StartProcess
+//      Run a user program.  Open the executable, load it into
+//      memory, and jump to it.
+//----------------------------------------------------------------------
+
+void
+StartProcess (char *filename)
+{
+    OpenFile *executable = fileSystem->Open (filename);
+    AddrSpace *space;
+
+    if (executable == NULL)
+      {
+	  SetColor (stdout, ColorRed);
+	  SetBold (stdout);
+	  printf ("Unable to open file %s\n", filename);
+	  ClearColor (stdout);
+	  return;
+      }
+    space = new AddrSpace (executable);
+    currentThread->space = space;
+
+    delete executable;		// close file
+
+    space->InitRegisters ();	// set the initial register values
+    space->RestoreState ();	// load page table register
+
+    machine->DumpMem ("memory.svg");
+    machine->Run ();		// jump to the user progam
+    ASSERT (FALSE);		// machine->Run never returns;
+    // the address space exits
+    // by doing the syscall "exit"
+}
+
+// Data structures needed for the console test.  Threads making
+// I/O requests wait on a Semaphore to delay until the I/O completes.
+
+static Console *console;
+static Semaphore *readAvail;
+static Semaphore *writeDone;
+
+//----------------------------------------------------------------------
+// ConsoleInterruptHandlers
+//      Wake up the thread that requested the I/O.
+//----------------------------------------------------------------------
+
+static void
+ReadAvailHandler (void *arg)
+{
+    (void) arg;
+    readAvail->V ();
+}
+static void
+WriteDoneHandler (void *arg)
+{
+    (void) arg;
+    writeDone->V ();
+}
+
+//----------------------------------------------------------------------
+// ConsoleTest
+//      Test the console by echoing characters typed at the input onto
+//      the output.  Stop when the user types a 'q'.
+//----------------------------------------------------------------------
+
+void
+ConsoleTest (const char *in, const char *out)
+{
+    char ch;
+
+    readAvail = new Semaphore ("read avail", 0);
+    writeDone = new Semaphore ("write done", 0);
+    console = new Console (in, out, ReadAvailHandler, WriteDoneHandler, NULL);
+
+    for (;;)
+      {
+	  readAvail->P ();	// wait for character to arrive
+	  ch = console->RX ();
+	  console->TX (ch);	// echo it!
+	  writeDone->P ();	// wait for write to finish
+	  if (ch == 'q') {
+	      printf ("Nothing more, bye!\n");
+	      break;		// if q, quit
+	  }
+      }
+    delete console;
+    delete readAvail;
+    delete writeDone;
+}