Any one know NachOS ??

[X-KAM-X]

Hi there~

Is there any one know NachOS ?

Do anyone did some project about it?

I am working with it now.

If there's any one tried it before.

Please share some experience with me. Or talk about it here. ^.^

[PH]

I am new in Nachos and i am trying to make a ready example work.

Example: modify the main program of Nachos (main.cc) to implement a “-S” command-line flag for Nachos that invokes the semaphore selftest function.

main.cc

Code: Select all

#define MAIN
#include "copyright.h"
#undef MAIN

#include "utility.h"
#include "system.h"


// Start Changes ++++++++++++++++++++++++++++++++++
extern void SelfTest(void), Copy(char *unixFile, char *nachosFile);
// End Changes +++++++++++++++++++++++++++++++++++++
extern void ThreadTest(void), Copy(char *unixFile, char *nachosFile);
extern void Print(char *file), PerformanceTest(void);
extern void StartProcess(char *file), ConsoleTest(char *in, char *out);
extern void MailTest(int networkID);


#ifdef THREADS
ThreadTest();
#endif
for (argc--, argv++; argc > 0; argc -= argCount, argv += argCount) {
argCount = 1;
if (!strcmp(*argv, "-z"))         // print copyright
printf (copyright);

// Start Changes +++++++++++++++++++++++++++++++++++++++++
if (!strcmp(*argv, "-S"))         //we compare the string that we enter with “S”
{
SelfTest();		          //invoke the semaphore SelfTest function
continue;
}
// End Changes +++++++++++++++++++++++++++++++++++++++++++

#ifdef USER_PROGRAM

if (!strcmp(*argv, "-x")) {        // run a user program
ASSERT(argc > 1);
StartProcess(*(argv + 1));
argCount = 2;

synch.cc

Code: Select all

void
Semaphore::V()
{
Thread *thread;
IntStatus oldLevel = interrupt->SetLevel(IntOff);
thread = (Thread *)queue->Remove();
if (thread != NULL)	   // make thread ready, consuming the V immediately
scheduler->ReadyToRun(thread);
value++;
(void) interrupt->SetLevel(oldLevel);
}


// Start Changes +++++++++++++++++++++++++++++++++++++++++++++++++++
Void SelfTest()
{
Semaphore *a = new Semaphore("ping", 0);     // pointer of type semaphore pointing											// to a new semaphore “ping”													// initialized with dummy variable 0
printf ("Invoking semaphore SelfTest() function\n");
a->SelfTest();				 //the actual invoking of the SelfTest funtion
printf ("Semaphore SelfTest() function stopped\n");
}
// End Changes ++++++++++++++++++++++++++++++++++++++++++++++++++
// Dummy functions -- so we can compile our later assignments
// Note -- without a correct implementation of Condition::Wait(),
// the test case in the network assignment won't work!
Lock::Lock(char* debugName) {}
Lock::~Lock() {}
void Lock::Acquire() {}
void Lock::Release() {}

Expected Output: The two printf statements
Actual Output: a normal execution on nachos like the flag wasnt invoked at all

Where is the mistake, why cant i see those outputs?
( Could there be smth wrong with the content of main.cc synch.cc or synch.h )

Waiting for a reply
Ill be online

[xyjamepa]

HELLO...this topic was made five years ago,
look at the date man.

[Combuster]

Let alone that the author won't see *any* mails about that you replied.
Best contact him ouside the forum.