Merge remote-tracking branch 'origin/thread_scheduler' into thread_scheduler

# Conflicts:
#	src/kernel/synch.rs

src/kernel/scheduler.rs

@@ -3,12 +3,12 @@ use std::rc::Rc;
 
 use crate::utility::list::List;
 use crate::kernel::thread::Thread;
-
+use super::thread_manager::ThreadManager;
-use super::system::System;
 
 #[derive(PartialEq)]
 pub struct Scheduler {
-    ready_list: List<Rc<RefCell<Thread>>>
+    ready_list: List<Rc<RefCell<Thread>>>,
+    pub thread_manager: Option<Rc<RefCell<ThreadManager>>> 
 }
 
 impl Scheduler {
@@ -18,7 +18,8 @@ impl Scheduler {
     /// Initilize the list of ready thread
     pub fn new() -> Self {
         Self {
-            ready_list: List::new()
+            ready_list: List::new(),
+            thread_manager: Option::None
         }
     }
 
@@ -53,16 +54,21 @@ impl Scheduler {
     /// ## Parameter
     /// 
     /// **next_thread** thread to dispatch to the CPU
-    pub fn switch_to(&self, system: &System, next_thread: Rc<RefCell<Thread>>) {
+    pub fn switch_to(&mut self, next_thread: Rc<RefCell<Thread>>) {
-        /* if let Some(old_thread) = system.get_g_current_thread() {
+        if let Some(tm) = &self.thread_manager {
-            old_thread.save_processor_state();
+            let rc = Rc::clone(&tm);
-            old_thread.save_simulator_state();
+            if let Some(old_thread) = tm.borrow_mut().get_g_current_thread() {
+                rc.borrow_mut().thread_save_processor_state(Rc::clone(&old_thread));
+                // old_thread.save_simulator_state();
 
                 if old_thread != &next_thread {
-                next_thread.restore_processor_state();
+                    rc.borrow_mut().thread_restore_processor_state(Rc::clone(&next_thread));
-                next_thread.restore_simulator_state();
+                    // next_thread.restore_simulator_state();
-                system.set_g_current_thread(Option::Some(next_thread));
+                    rc.borrow_mut().set_g_current_thread(Option::Some(next_thread));
-            }
+                }
-        } */
+            }
+        } else {
+            panic!("thread manager shouldn't be none");
+        }
     }
 }

src/kernel/synch.rs

@@ -111,7 +111,7 @@ impl<'t> Lock<'_> {
     pub fn release(&mut self, machine: &mut Machine, scheduler: &mut Scheduler, current_thread: Rc<RefCell<Thread>>) {
         let old_status = machine.interrupt.set_status(InterruptOff);
 
-        if self.held_by_current_thread(current_thread) {
+        if self.is_held_by_current_thread(current_thread) {
             if self.waiting_queue.peek() != None {
                 self.owner = self.waiting_queue.pop().unwrap();
                 scheduler.ready_to_run(Rc::clone(&self.owner));
@@ -123,7 +123,7 @@ impl<'t> Lock<'_> {
         machine.interrupt.set_status(old_status);
     }
 
-    pub fn held_by_current_thread(&mut self, current_thread: Rc<RefCell<Thread>>) -> bool {
+    pub fn is_held_by_current_thread(&mut self, current_thread: Rc<RefCell<Thread>>) -> bool {
         Rc::ptr_eq(&self.owner, &current_thread)
     }
 }

src/kernel/system.rs

@@ -1,4 +1,4 @@
-use std::cell::RefCell;
+use std::{cell::RefCell, rc::Rc};
 
 use crate::simulator::machine::Machine;
 
@@ -15,24 +15,27 @@ use super::thread_manager::ThreadManager;
 /// - The thread to be destroyed next
 /// - The scheduler which acts upon these threads
 #[derive(PartialEq)]
-pub struct System<'a> {
+pub struct System {
     g_machine: RefCell<Machine>,
-    thread_manager: ThreadManager<'a>
+    thread_manager: Rc<RefCell<ThreadManager>>
 }
 
-impl<'a> System<'a> {
+impl System {
 
     /// System constructor
-    pub fn new(machine: Machine) -> System<'a> {
+    pub fn new(machine: Machine) -> System {
         Self {
             g_machine: RefCell::new(machine),
-            thread_manager: ThreadManager::new()
+            thread_manager: Rc::new(RefCell::new(ThreadManager::new()))
         }
     }
 
     /// use thread_manager setter to send it system instance
-    pub fn freeze(&'a mut self) {
+    pub fn freeze(this: Rc<RefCell<System>>) {
-        self.thread_manager.system.set(Option::Some(self));
+        let copy = Rc::clone(&this);
+        let tm = &this.borrow_mut().thread_manager;
+        tm.borrow_mut().system = Option::Some(copy);
+        ThreadManager::freeze(tm);
     }
 
     // GETTERS
@@ -62,3 +65,25 @@ pub enum ObjectType {
     ThreadType,
     InvalidType
 }
+
+#[cfg(test)]
+mod tests {
+
+    use crate::{System, Machine};
+
+    macro_rules! init_system {
+        () => {{
+            let m = Machine::init_machine();
+            init_system!(m)
+        }};
+        ($a:expr) => {{
+            System::new($a)
+        }};
+    }
+
+    #[test]
+    fn test_init_system() {
+        init_system!();
+    }
+
+}

src/kernel/thread_manager.rs

@@ -1,21 +1,21 @@
-use std::{rc::Rc, cell::{Cell, RefCell, RefMut, Ref}};
+use std::{rc::Rc, cell::{RefCell, RefMut, Ref}};
 
-use crate::{utility::list::List, simulator::machine::{NUM_INT_REGS, NUM_FP_REGS}};
+use crate::{utility::list::List, simulator::{machine::{NUM_INT_REGS, NUM_FP_REGS}, interrupt::InterruptStatus}};
 
 use super::{scheduler::Scheduler, thread::Thread, system::System, mgerror::ErrorCode, process::Process};
 
 pub const SIMULATORSTACKSIZE: usize = 32 * 1024;
 
 #[derive(PartialEq)]
-pub struct ThreadManager<'a> {
+pub struct ThreadManager {
-    pub g_current_thread: Option<Thread>,
+    pub g_current_thread: Option<Rc<RefCell<Thread>>>,
-    pub g_thread_to_be_destroyed: Option<Thread>,
+    pub g_thread_to_be_destroyed: Option<Rc<RefCell<Thread>>>,
     pub g_alive: List<Rc<RefCell<Thread>>>,
     pub g_scheduler: Scheduler,
-    pub system: Cell<Option<&'a System<'a>>>
+    pub system: Option<Rc<RefCell<System>>>
 }
 
-impl<'a> ThreadManager<'a> {
+impl ThreadManager {
 
     pub fn new() -> Self {
         Self { 
@@ -23,13 +23,19 @@ impl<'a> ThreadManager<'a> {
             g_thread_to_be_destroyed: Option::None, 
             g_alive: List::new(),
             g_scheduler: Scheduler::new(), 
-            system: Cell::new(None)
+            system: Option::None
         }
     }
 
+    pub fn freeze(this: &Rc<RefCell<ThreadManager>>) {
+        let copy = Rc::clone(this);
+        this.borrow_mut().g_scheduler.thread_manager = Option::Some(copy);
+    }
+
     /// Start a thread, attaching it to a process
     pub fn start_thread(&mut self, thread: Rc<RefCell<Thread>>, owner: Process, func_pc: i64, argument: i64) -> Result<(), ErrorCode> {
         let mut thread_m = thread.borrow_mut();
+        assert_eq!(thread_m.process, Option::None);
         thread_m.process = Option::Some(owner);
         let ptr = 0; // todo addrspace
         thread_m.init_thread_context(func_pc, ptr, argument);
@@ -37,7 +43,7 @@ impl<'a> ThreadManager<'a> {
         thread_m.init_simulator_context(base_stack_addr);
         thread_m.process.as_mut().unwrap().num_thread += 1;
         self.get_g_alive().push(Rc::clone(&thread));
-        self.g_scheduler().ready_to_run(Rc::clone(&thread));
+        self.g_scheduler.ready_to_run(Rc::clone(&thread));
         Result::Ok(())
     }
 
@@ -52,15 +58,17 @@ impl<'a> ThreadManager<'a> {
     /// 
     /// Cannot use yield as a function name -> reserved name in rust
     pub fn thread_yield(&mut self, thread: Rc<RefCell<Thread>>) {
-        if let Some(system) = self.system.get() {
+        if let Some(system) = &self.system {
-            let mut machine = system.get_g_machine().borrow_mut();
+            let sys = system.borrow_mut();
+            let mut machine = sys.get_g_machine().borrow_mut();
             let old_status = machine.interrupt.set_status(crate::simulator::interrupt::InterruptStatus::InterruptOff);
             
-            let next_thread = self.g_scheduler().find_next_to_run();
+            assert_eq!(Option::Some(Rc::clone(&thread)), self.g_current_thread);
+            let next_thread = self.g_scheduler.find_next_to_run();
             if let Some(next_thread) = next_thread {
-                let scheduler = self.g_scheduler();
+                let scheduler = &mut self.g_scheduler;
                 scheduler.ready_to_run(thread);
-                scheduler.switch_to(system, next_thread);
+                scheduler.switch_to(next_thread);
             }
             machine.interrupt.set_status(old_status);
         }
@@ -68,7 +76,21 @@ impl<'a> ThreadManager<'a> {
 
     /// Put the thread to sleep and relinquish the processor
     pub fn thread_sleep(&mut self, thread: Rc<RefCell<Thread>>) {
-        todo!();
+        
+        assert_eq!(Option::Some(Rc::clone(&thread)), self.g_current_thread);
+        if let Some(system) = &self.system {
+            let sys = system.borrow_mut();
+            let machine = sys.get_g_machine().borrow_mut();
+            assert_eq!(machine.interrupt.get_status(), InterruptStatus::InterruptOff);
+
+            let mut next_thread = self.g_scheduler.find_next_to_run();
+            while next_thread.is_none() {
+                machine.interrupt.idle();
+                next_thread = self.g_scheduler.find_next_to_run();
+            }
+            self.g_scheduler.switch_to(Rc::clone(&next_thread.unwrap()));
+            
+        }
     }
 
     /// Finish the execution of the thread and prepare its deallocation
@@ -77,8 +99,9 @@ impl<'a> ThreadManager<'a> {
     }
 
     pub fn thread_save_processor_state(&mut self, thread: Rc<RefCell<Thread>>) {
-        if let Some(system) = self.system.get() {
+        if let Some(system) = &self.system {
             let mut t: RefMut<_> = thread.borrow_mut();
+            let system = system.borrow_mut();
             for i in 0..NUM_INT_REGS {
                 t.thread_context.int_registers[i] = system.get_g_machine().borrow().read_int_register(i);
             }
@@ -91,7 +114,8 @@ impl<'a> ThreadManager<'a> {
     }
 
     pub fn thread_restore_processor_state(&self, thread: Rc<RefCell<Thread>>) {
-        if let Some(system) = self.system.get() {
+        if let Some(system) = &self.system {
+            let system = system.borrow_mut();
             let t: Ref<_> = thread.borrow();
             for i in 0..NUM_INT_REGS {
                 let machine = system.get_g_machine();
@@ -104,14 +128,14 @@ impl<'a> ThreadManager<'a> {
     }
 
     /// Currently running thread
-    pub fn get_g_current_thread(&mut self) -> &mut Option<Thread> {
+    pub fn get_g_current_thread(&mut self) -> &mut Option<Rc<RefCell<Thread>>> {
         &mut self.g_current_thread
     }
 
     /// Thread to be destroyed by [...]
     /// 
     /// TODO: Finish the comment with the relevant value
-    pub fn get_g_thread_to_be_destroyed(&mut self) -> &mut Option<Thread> {
+    pub fn get_g_thread_to_be_destroyed(&mut self) -> &mut Option<Rc<RefCell<Thread>>> {
         &mut self.g_thread_to_be_destroyed
     }
 
@@ -120,18 +144,13 @@ impl<'a> ThreadManager<'a> {
         &mut self.g_alive
     }
 
-    /// Current scheduler
-    pub fn g_scheduler(&mut self) -> &mut Scheduler {
-        &mut self.g_scheduler
-    }
-
     /// Set currently running thread
-    pub fn set_g_current_thread(&mut self, thread: Option<Thread>) {
+    pub fn set_g_current_thread(&mut self, thread: Option<Rc<RefCell<Thread>>>) {
         self.g_current_thread = thread
     }
 
     /// Set thread to be destroyed next
-    pub fn set_g_thread_to_be_destroyed(&mut self, thread: Option<Thread>) {
+    pub fn set_g_thread_to_be_destroyed(&mut self, thread: Option<Rc<RefCell<Thread>>>) {
         self.g_thread_to_be_destroyed = thread
     }
 

src/main.rs

@@ -13,11 +13,14 @@ mod kernel;
 /// module containing useful tools which can be use in most part of the OS to ease the development of the OS
 pub mod utility;
 
+use std::{rc::Rc, cell::RefCell};
+
 use kernel::system::System;
 use simulator::machine::Machine;
 
 fn main() {
     let machine = Machine::init_machine();
-    let mut system = System::new(machine);
+    let system = Rc::new(RefCell::new(System::new(machine)));
-    system.freeze();
+
+    System::freeze(system);
 }

src/simulator/interrupt.rs

@@ -29,9 +29,13 @@ impl Interrupt {
         self.level
     }
 
+    pub fn idle(&self) {
+        todo!();
     }
 
-#[derive(PartialEq, Clone, Copy)]
+}
+
+#[derive(PartialEq, Clone, Copy, Debug)]
 pub enum InterruptStatus {
     InterruptOff,
     InterruptOn

src/simulator/machine.rs

@@ -6,6 +6,29 @@ use super::{decode::{Instruction, decode}, interrupt::Interrupt};
 use super::global::*;
 use std::fs::File;
 
+
+/*
+*  Decommenter la variant si il est utilisé quelque part
+ */
+pub enum ExceptionType {
+	NO_EXCEPTION,//Everything ok!
+	//SYSCALL_EXCEPTION,//A program executed a system call.
+	PAGEFAULT_EXCEPTION,//Page fault exception
+	READONLY_EXCEPTION,//Write attempted to a page marked "read-only" */
+	//BUSERROR_EXCEPTION,     
+	/* translation resulted
+	in an invalid physical
+	address (mis-aligned or
+	out-of-bounds) */
+	ADDRESSERROR_EXCEPTION, /* Reference that was
+				  not mapped in the address
+				  space */
+	//OVERFLOW_EXCEPTION,     //Integer overflow in add or sub.
+	//ILLEGALINSTR_EXCEPTION, //Unimplemented or reserved instr.
+	//NUM_EXCEPTION_TYPES
+}
+
+
 pub const STACK_REG: usize = 2;
 
 pub const NUM_INT_REGS: usize = 32;
@@ -13,6 +36,8 @@ pub const NUM_FP_REGS: usize = 32;
 
 /// doit disparaitre
 const MEM_SIZE : usize = 0x500000;
+//doit etre une puissance de deux
+pub const PAGE_SIZE : u64 = 128;
 
 pub trait RegisterNum: Add<Output=Self> + Sub<Output=Self> + PartialEq + Copy {}
 
@@ -734,7 +759,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memoryCompTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceComp.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -748,7 +773,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memoryDivTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceDiv.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -762,7 +787,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memoryIfTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceIf.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -776,7 +801,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memoryJumpTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceJump.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -785,12 +810,12 @@ mod test {
 	#[test]
 	fn test_mul() {
 		let mut m = Machine::init_machine();
-		let memory_before = mem_cmp::MemChecker::from("test/machine/memoryMul.txt").unwrap();
+		let memory_before = mem_cmp::MemChecker::from("test/machine/memoryMult.txt").unwrap();
-		let memory_after = mem_cmp::MemChecker::from("test/machine/memoryMulEnd.txt").unwrap();
+		let memory_after = mem_cmp::MemChecker::from("test/machine/memoryMultEnd.txt").unwrap();
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memoryMulTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceMult.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -804,7 +829,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memoryRetTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceRet.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -818,7 +843,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memorySubTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceSub.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));
@@ -832,7 +857,7 @@ mod test {
 		mem_cmp::MemChecker::fill_memory_from_mem_checker(&memory_before, &mut m);
 		Machine::run(&mut m);
 
-		let expected_trace = fs::read_to_string("test/machine/memorySwitchTrace.txt").unwrap();
+		let expected_trace = fs::read_to_string("test/machine/reg_traceSwitch.txt").unwrap();
 
 		assert!(mem_cmp::MemChecker::compare_machine_memory(&memory_after, &m));
 		assert!(expected_trace.contains(m.registers_trace.as_str()));

src/simulator/mmu.rs

@@ -0,0 +1,50 @@
+use crate::simulator::translationtable::*;
+use crate::simulator::machine::*;
+
+use super::machine::ExceptionType;
+
+pub struct MMU <'a>{
+    /* Un MMU possède une seule référence vers une table des pages à un instant donné
+    * Cette table est associée au processus courant
+    * Cette référence peut etre mise a jour par exemple lors d'un switchTo
+     */
+    translationTable : Option<&'a mut TranslationTable>
+}
+
+impl <'a>MMU <'_>{
+
+    fn create() -> MMU <'a>{
+
+        MMU{
+            translationTable : None
+        }
+    }
+
+    fn translate(mmu : &mut MMU, virtAddr : u64, physAddr : &mut u64, size : usize, writing : bool) -> ExceptionType {
+
+        let virtual_page_index : u64 = virtAddr/PAGE_SIZE;
+        let offset : u64 = virtAddr%PAGE_SIZE;
+
+        
+            
+            match &mmu.translationTable {
+                None => {
+                    println!("Error from translate : MMU refers to None (No page Table)");
+                    return ExceptionType::ADDRESSERROR_EXCEPTION;
+                }
+
+                Some(table_ref) => {
+
+                    //On verifie que notre index est valide
+                    if virtual_page_index >= table_ref.get_max_num_pages(){
+
+                    }
+
+                    //is the page correctyl mapped ?
+                    //if table_ref.pageTable.get
+                }
+            }
+
+        ExceptionType::NO_EXCEPTION
+    }
+ }

src/simulator/mod.rs

@@ -4,6 +4,8 @@ pub mod print;
 pub mod mem_cmp;
 pub mod loader;
 pub mod interrupt;
+pub mod translationtable;
+pub mod mmu;
 
 pub mod global {
 

src/simulator/translationtable.rs

@@ -0,0 +1,193 @@
+//Nombre maximum de correspondances dans une table des pages
+//Cette donnée devra a terme etre recupérée depuis un fichier de configuration
+const MaxVirtPages : u64 = 200000;
+
+
+/* Une table de correspondance propre à un processus
+*  Une variable de type TranslationTable devra etre possédée par un objet de type Process
+ */
+pub struct TranslationTable{
+    //capacité de cette table <=> nombre de correspondances possibles
+    //A voir si cette donnée doit etre immuable
+    pub maxNumPages : u64,
+
+    //la table en question
+    //Vec implemente le trait Index, donc un bon choix
+    pub pageTable : Vec<PageTableEntry>
+}
+
+impl TranslationTable {
+
+    pub fn create() -> TranslationTable {
+
+        let mut tmp_vec : Vec<PageTableEntry> = Vec::new();
+
+        for i in 0..MaxVirtPages {
+            tmp_vec.push(PageTableEntry::create());
+        }
+
+        TranslationTable{
+            maxNumPages : MaxVirtPages,
+            pageTable : tmp_vec
+        }
+    }
+
+    //vpn = virtual page number, c'est un index dans la table des page
+    //Assert a mettre dans chacune des fonctions suivantes
+
+    pub fn get_max_num_pages(&self) -> u64{
+        return self.maxNumPages;
+    }
+
+    pub fn set_physical_page(&mut self, vpn : u64, physical_page : i32){
+        self.pageTable[vpn as usize].physical_page = physical_page;
+    }
+
+    pub fn get_physical_page(&self, vpn : u64) -> i32{
+        self.pageTable[vpn as usize].physical_page
+    }
+
+    pub fn set_addr_disk(&mut self, vpn : u64, addr_disk : i32){
+        self.pageTable[vpn as usize].addr_disk = addr_disk;
+    }
+
+    pub fn get_addr_disk(&self, vpn : u64) -> i32 {
+        self.pageTable[vpn as usize].addr_disk
+    }
+
+    pub fn set_bit_valid(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].valid = true;
+    }
+
+    pub fn clear_bit_valid(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].valid = false;
+    }
+
+    pub fn get_bit_valid(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].valid
+    }
+
+    pub fn set_bit_io(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].io = true;
+    }
+
+    pub fn clear_bit_io(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].io = false;
+    }
+
+    pub fn get_bit_io(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].io
+    }
+
+    pub fn set_bit_swap(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].swap = true;
+    }
+
+    pub fn clear_bit_swap(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].swap = false;
+    }
+
+    pub fn get_bit_swap(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].swap
+    }
+
+    pub fn set_bit_write(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].write_allowed = true;
+    }
+
+    pub fn clear_bit_write(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].write_allowed = false;
+    }
+
+    pub fn get_bit_write(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].write_allowed
+    }
+
+    pub fn set_bit_read(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].read_allowed = true;
+    }
+
+    pub fn clear_bit_read(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].read_allowed = false;
+    }
+
+    pub fn get_bit_read(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].read_allowed
+    }
+
+    pub fn set_bit_U(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].U = true;
+    }
+
+    pub fn clear_bit_U(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].U = false;
+    }
+
+    pub fn get_bit_U(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].U
+    }
+
+    pub fn set_bit_M(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].M = true;
+    }
+
+    pub fn clear_bit_M(&mut self, vpn : u64){
+        self.pageTable[vpn as usize].M = false;
+    }
+
+    pub fn get_bit_M(&self, vpn : u64) -> bool{
+        self.pageTable[vpn as usize].M
+    }
+
+
+}
+
+
+
+/* Une correspondance + données sur cette correspondance
+ */
+pub struct PageTableEntry{
+    //true <=> la correspondance est valide et la page est présente dans la ram
+    valid : bool,
+
+    //true <=> la page a été accédée (lecture/ecriture) récemment
+    U : bool,
+    
+    //true <=> page modifiée mais non sauvegardée sur disque
+    M : bool,
+
+    //droits d'accès sur cette page
+    read_allowed : bool,
+    write_allowed : bool,
+
+    //numero de page physique <=> c'est notre correspondance
+    physical_page : i32,
+
+    //true <=> cette page doit etre chargée depuis la swap zone du disque
+    swap : bool,
+
+    //a définir plus tard, en relation avec swap
+    addr_disk : i32,
+
+    //mis  à 1 par le système quand cette page est impliquée dans une opération d'IO
+    io : bool
+}
+
+impl PageTableEntry{
+
+    //Default PageTableEntry Constructor
+    pub fn create() -> PageTableEntry {
+        PageTableEntry {
+            valid : false,
+            U : false,
+            M : false,
+            read_allowed : false,
+            write_allowed : false,
+            physical_page : -1i32,
+            swap : false,
+            addr_disk : -1i32,
+            io : false
+        }
+    }
+
+}

test/machine/reg_traceComp.txt

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test/machine/reg_traceDiv.txt

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test/machine/reg_traceIf.txt

@@ -0,0 +1,26 @@
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test/machine/reg_traceJump.txt

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test/machine/reg_traceMult.txt

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test/machine/reg_traceRet.txt

@@ -0,0 +1,14 @@
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