Merge branch 'toto' into 'main'

Added build.rs script

See merge request simpleos/burritos!28

Makefile

@@ -1,6 +1,13 @@
 TOPDIR=.
 include $(TOPDIR)/Makefile.config
 
+#
+# Demo vars
+#
+FLAGS=--offline -r --
+CARGO=RUSTFLAGS=-Awarnings cargo run ${FLAGS}
+
+
 
 all: dumps user_lib instruction_tests syscall
 # 
@@ -22,10 +29,27 @@ syscall: user_lib
 	$(MAKE) build -C test/syscall_tests/
 	$(RM) test/syscall_tests/*.o
 	mkdir -p ${TOPDIR}/target/guac/
-	find . -name '*.guac' -exec mv {} ${TOPDIR}/target/guac/ \;
+	find . -name '*.guac' -exec mv {} ${TOPDIR}/target/guac/ 2> /dev/null \;
 
 clean:
 	$(MAKE) clean -C userlib/
 	$(MAKE) clean -C test/
 	$(RM) -rf $(TOPDIR)/target
-	
+
+#
+# Demo targets
+#
+halt: syscall
+	${CARGO} -x ./target/guac/halt.guac -d3
+
+pc: syscall
+	${CARGO} -x ./target/guac/producteur_consommateur.guac -d2
+
+matmult: syscall
+	${CARGO} -x ./target/guac/matmult.guac -d2
+
+lock: syscall
+	${CARGO} -x ./target/guac/lock.guac -d2
+
+prints: syscall
+	${CARGO} -x ./target/guac/prints.guac -d2

README.md

@@ -6,6 +6,76 @@ BurritOS (BurritOS Using Rust Really Improves The Operating System) is an educat
 
 Based on [NachOS](https://homes.cs.washington.edu/~tom/nachos/) (Copyright (c) 1992-1993 The Regents of the University of California. All rights reserved.)
 
+## Progress overview
+
+![Progress overview](./assets/progress_overview.png)
+
+Currently, the BurritOS project simulator contains a RISC-V processing unit supporting all 47 base instructions plus multiplication and 32bit floating point operations. RAM and the interrupt controller are also integrated. Both the memory management unit and the Disk are written but not tested nor integrated yet.
+
+On the kernel side, synchronization primitives and scheduling logic are all implemented except for Conditions. 
+
+## Build instructions
+
+To build in release mode:
+
+```
+$ cargo build -r
+```
+
+To build in development mode:
+
+```
+$ cargo build
+```
+
+The generated executable can then be found in the `./target` directory.
+
+## Running BurritOS
+
+*In the following examples, BurritOS is started by directly invoking its executable. However, replacing this direct invocation by `cargo run -- <PARAMETERS>` would garner the same result.*
+
+As it stands, BurritOS does not include a virtual console nor a shell for dynamic user interaction. Thus, programs need to be manually loaded into the system memory. To perform this operation:
+
+```
+$ ./burritos --executable <PATH>
+```
+
+## Help
+
+BurritOS provides a succinct manual. To display this manual:
+
+```
+$ ./burritos --help
+```
+
+## Documentation
+
+Documentation for all components of the BurritOS project can be generated using the following command:
+
+```
+$ cargo doc
+```
+
+The generated web documentation can be found in the `./target/doc` directory.
+
+## Tests
+
+BurritOS is unit tested using the cargo provided testing framework. However, some tests, most notably the Machine tests, require access to a few files **which need to be generated first**.
+
+To generate test files:
+
+```
+$ make all
+```
+
+Afterwards, tests can be run with:
+
+```
+$ cargo test
+```
+
+All make artifacts can be found in the `./target` directory.
+
 ## Authors
 
 Amaury Brodu, Abdelmajid El Bahri, François Autin, Quentin Legot, Baptiste Meauze, Gabriel Moysan, Rémi Rativel, Samy Solhi

build.rs

@@ -0,0 +1,12 @@
+//! Build script for BurritOS.
+//! 
+//! Moves files from the assets folder to the target directory
+//! and runs `make all`.
+
+use std::process::Command;
+
+fn main() {
+    let mut make_all = Command::new("make");
+    make_all.arg("all");
+    println!("{:?}", make_all.output().unwrap());
+}

src/kernel/exception.rs

@@ -1,3 +1,8 @@
+//! # Exceprions
+//!
+//! This module Enum the constant values of the exceptions.
+//! They are used to stop the system to execute some opperation
+
 use std::{cell::RefCell, rc::Rc};
 
 use crate::{simulator::{machine::{ExceptionType, Machine}, error::{MachineOk, MachineError}}};
@@ -183,7 +188,7 @@ fn syscall(machine: &mut Machine, system: &mut System) -> Result<MachineOk, Mach
         SC_LOCK_CREATE => sc_lock_create(machine, system),
         SC_LOCK_DESTROY => sc_lock_destroy(machine, system),
         SC_LOCK_ACQUIRE => sc_lock_acquire(machine, system),
-        SC_LOCK_RELEASE => todo!(),
+        SC_LOCK_RELEASE => sc_lock_release(machine, system),
         SC_COND_CREATE => todo!(),
         SC_COND_DESTROY => todo!(),
         SC_COND_WAIT => todo!(),
@@ -292,6 +297,7 @@ fn sc_new_thread(machine: &mut Machine, system: &mut System) -> Result<MachineOk
     } else {
         return Err("Process owner of current thread is none")?;
     }
+
 }
 
 fn sc_join(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {

src/kernel/mgerror.rs

@@ -1,3 +1,11 @@
+//! # Error Code
+//!
+//! This module enumerate the possibles error code who could get in a function
+//!
+//! **Basic Usage:*
+//!
+//! Result<YourSuccessStruct, **ErrorCode**
+
 #![allow(unused, clippy::missing_docs_in_private_items)]
 /// Error enum, use it with Result<YourSucessStruct, **ErrorCode**>
 pub enum ErrorCode {

src/kernel/mod.rs

@@ -1,3 +1,9 @@
+//! # Kernel
+//!
+//! This module contains all the tool required for the kernel to work.
+//!
+//! Currently it contains the scheduling and synchroisation tools, but it will contains the tools
+//! required Memory gestion, Files gestion and peripheral pilots.
 pub mod process;
 pub mod thread;
 pub mod mgerror;

src/kernel/synch.rs

@@ -1,3 +1,11 @@
+//! # Synchronisation
+//!
+//! This module contains some scheduling and synchronisation utilities:
+//! - **Semaphore**
+//! - **Lock**
+//!
+//! Conditions aren't implemented currently
+
 use crate::utility::list::List;
 use crate::kernel::thread::Thread;
 use crate::simulator::interrupt::InterruptStatus::InterruptOff;
@@ -6,20 +14,21 @@ use std::cell::RefCell;
 use std::rc::Rc;
 use super::thread_manager::ThreadManager;
 
-///     Structure of a Semaphore used for synchronisation
+/// Structure of a Semaphore used for synchronisation.
+/// It use a counter to determine the number of thread that can be executed simultaneously.
 #[derive(PartialEq)]
 pub struct Semaphore {
 
-    /// Counter of simultanous Semaphore
+    /// Counter of simultaneous Semaphore
     pub counter:i32,
-    /// QUeue of Semaphore waiting to be exucated
+    /// QUeue of Semaphore waiting to be executed
     pub waiting_queue:List<Rc<RefCell<Thread>>>,
 
 }
 
 impl Semaphore {
 
-    ///     Initializes a semaphore, so that it can be used for synchronization.
+    /// Initializes a semaphore, so that it can be used for synchronization.
     ///
     ///  ### Parameters
     /// - *counter* initial value of counter
@@ -49,7 +58,7 @@ pub struct Lock {
 impl Lock {
 
     ///    Initialize a Lock, so that it can be used for synchronization.
-    /// The lock is initialy free
+    /// The lock is initially free
     ///
     /// ### Parameters
     /// - **thread_manager** Thread manager which managing threads
@@ -72,7 +81,7 @@ impl Lock {
         let old_status = machine.interrupt.set_status(InterruptOff);
         if self.free {
             self.free = false;
-            self.owner = Option::Some(match thread_manager.get_g_current_thread() {
+            self.owner = Some(match thread_manager.get_g_current_thread() {
                 Some(th) => {
                     Rc::clone(&th)
                 },
@@ -128,8 +137,14 @@ impl Lock {
         machine.interrupt.set_status(old_status);
     }
 
-    ///    True if the current thread holds this lock.
+    /// Say if the lock is held by the current thread
     /// Useful for checking in Release, and in Condition operations below.
+    /// ### Parameters
+    /// - **self** The current lock
+    /// - **thread-manager** The thread manager present in the system
+    /// ### Return
+    /// True if the current thread holds this lock.
+
     pub fn held_by_current_thread(&mut self, thread_manager: &mut ThreadManager) -> bool {
         match &self.owner {
             Some(x) => 

src/kernel/thread.rs

@@ -1,3 +1,6 @@
+//! # Thread
+//!
+//!
 use std::{rc::Rc, cell::RefCell};
 
 use super::{process::Process, thread_manager::ThreadRef};

src/kernel/thread_manager.rs

@@ -119,6 +119,9 @@ pub struct ThreadManager {
     obj_addrs: ObjAddr,
     /// If true, enables debug mode
     debug: bool,
+    /// Temporary field, to be removed when virtual memory will be available to use.
+    /// 
+    /// A value to know where the next starting thread should have its stack pointer
     sp_max: u64,
 }
 
@@ -136,19 +139,19 @@ impl ThreadManager {
         }
     }
 
-    /// Mark a thread as aready, but not necessarily running yet.
+    /// Mark `thread` as ready, but not necessarily running yet.
     /// 
     /// Put it in the ready list, for later scheduling onto the CPU.
     /// 
     /// ## Pamameter
     /// 
-    /// **thread** is the thread to be put on the read list
+    /// **thread** is the thread to be put on the ready list
     pub fn ready_to_run(&mut self, thread: ThreadRef) {
         self.ready_list.push(thread);
     }
 
     /// Return the next thread to be scheduled onto the CPU.
-    /// If there are no ready threads, return Option::None
+    /// If there are no ready threads, return `Option::None`
     /// 
     /// Thread is removed from the ready list.
     /// 
@@ -157,12 +160,12 @@ impl ThreadManager {
         self.ready_list.pop()
     }
 
-    /// Dispatch the CPU to next_thread. Save the state of the old thread 
+    /// Dispatch the CPU to `next_thread`. Save the state of the old thread 
     /// and load the state of the new thread.
     /// 
     /// We assume the state of the previously running thread has already been changed from running to blocked or ready.
     /// 
-    /// Global variable g_current_thread become next_thread
+    /// Variable `g_current_thread` become next_thread
     /// 
     /// ## Parameter
     /// 
@@ -187,6 +190,14 @@ impl ThreadManager {
     }
 
     /// Start a thread, attaching it to a process
+    /// 
+    /// ## Parameter
+    /// 
+    /// **thread** thread to start
+    /// **owner** process owner of thread (after the execution of this method)
+    /// **func_pc** pc the thread
+    /// **sp_loc** stack pointer of the thread, to remove (or move) when mmu will be completed
+    /// **argument** value to be place on register[10]
     pub fn start_thread(&mut self, thread: ThreadRef, owner: Rc<RefCell<Process>>, func_pc: u64, sp_loc: u64, argument: i64) {
         self.debug(format!("starting thread \"{}\"", thread.borrow().get_name()));
 
@@ -201,6 +212,11 @@ impl ThreadManager {
     }
 
     /// Wait for another thread to finish its execution
+    /// 
+    /// If the thread you want to wait doesn't exist (isn't alive), execution will resume.
+    /// Otherwise, CPU is dispatch to next alive thread if any. 
+    /// 
+    /// When the thread you want to join finish, it place the waiting thread (self) in ready list
     pub fn thread_join(&mut self, machine: &mut Machine, waiter: ThreadRef, waiting_for: ThreadRef) {
         let waiting_for = Rc::clone(&waiting_for);
         if self.get_g_alive().contains(&waiting_for) {
@@ -210,11 +226,20 @@ impl ThreadManager {
     }
 
     /// Relinquish the CPU if any other thread is runnable.
+    ///
+    /// If so, put the current thread at the end of the ready list, so it'll be re-scheduled in the future.
     /// 
-    /// Cannot use yield as a function name -> reserved name in rust
+    /// **Returns** immediately if there's no other thread ready or return when the current thread has been switched.
+    /// 
+    /// Interruptions are disabled during the process, so all the process of looking for a next thread and switching to it is atomic,
+    /// and is place at its old status at the end of the method.
+    /// 
+    /// Cannot use `yield` as a function name -> reserved name in rust
     /// 
     /// ## Parameters
     /// 
+    /// **machine** RISC-V simulator
+    /// **thread** current thread to be relinquish
     /// **is_ready** true if **thread** should be readded to ready_to_run list, false otherwise. Typically false when joining per example
     pub fn thread_yield(&mut self, machine: &mut Machine, thread: ThreadRef, is_ready: bool) {
         let old_status = machine.interrupt.set_status(crate::simulator::interrupt::InterruptStatus::InterruptOff);
@@ -231,7 +256,16 @@ impl ThreadManager {
         machine.interrupt.set_status(old_status);    
     }
 
-    /// Put the thread to sleep and relinquish the processor
+    /// Put the thread to sleep and relinquish the processor because the current thread is blocked (Semaphore, Lock, Condition) or because it finished its execution
+    /// 
+    /// Another thread will eventually wake it up and put it back to ready list after it has been unblocked.
+    /// 
+    /// Behavior now: At the moment, disk isn't fully develop and not integrated to burritos, so if there's no ready thread, then we stop the OS.
+    /// 
+    /// Behaviour in the future: If there are no threads on the ready list, that means there is no thread to run, 
+    /// we assume this is because at least one thread is waiting for I/O [`interrupt`](crate::simulator::interrupt::Interrupt) (the only reason a new thread can become ready at this point).
+    /// 
+    /// We also assume interruption are already disabled, becuase it's called from a synchronization routine for interrupt should be disabled.
     pub fn thread_sleep(&mut self, machine: &mut Machine, thread: ThreadRef) {
         debug_assert_eq!(Option::Some(Rc::clone(&thread)), self.g_current_thread);
         debug_assert_eq!(machine.interrupt.get_status(), InterruptStatus::InterruptOff);
@@ -252,6 +286,12 @@ impl ThreadManager {
     }
 
     /// Finish the execution of the thread and prepare its deallocation
+    /// 
+    /// Called by the thread itself when it finish its execution ([`Exit`](super::exception::SC_EXIT) exception).
+    /// 
+    /// We remove the thread from the alive list, and rustc deallocate the thread itself(behaviour different than Nachos)
+    /// 
+    /// Interruption are disabled to assume atomicity.
     pub fn thread_finish(&mut self, machine: &mut Machine, thread: ThreadRef, exit_code: i64) {
         let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
         assert!(self.g_alive.remove(Rc::clone(&thread)));
@@ -265,6 +305,8 @@ impl ThreadManager {
     }
 
 	/// Save the CPU state of a user program on a context switch.
+    /// 
+    /// Save PC and registers
     pub fn thread_save_processor_state(&mut self, machine: &mut Machine, thread: ThreadRef) {
         let mut t = thread.borrow_mut();
         for i in 0..NUM_INT_REGS {
@@ -277,6 +319,8 @@ impl ThreadManager {
     }
 
     /// Restore the CPU state of a user program on a context switch.
+    /// 
+    /// Restore PC and registers
     pub fn thread_restore_processor_state(&self, machine: &mut Machine, thread: ThreadRef) {
         let t: Ref<_> = thread.borrow();
         for i in 0..NUM_INT_REGS {
@@ -371,7 +415,9 @@ impl ThreadManager {
         Ok(MachineOk::Ok)
     }
 
-    ///     Wake up a waiter if necessary, or release it if no thread is waiting.
+    /// Release lock hold by current thread and wake up a waiter if necessary, placing it on ready list, this thread now hold the lock.
+    /// 
+    /// If no thread is waiting for the lock, the lock is released
     pub fn lock_release(&mut self, id: i32, machine: &mut Machine) -> Result<MachineOk, MachineError> {
         let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
         let current_thread = match self.get_g_current_thread() {
@@ -402,12 +448,12 @@ impl ThreadManager {
         Ok(MachineOk::Ok)
     }
 
-    /// Currently running thread
+    /// Return currently running thread
     pub fn get_g_current_thread(&mut self) -> &Option<ThreadRef> {
         &self.g_current_thread
     }
 
-    /// List of alive threads
+    /// Return list of alive threads
     pub fn get_g_alive(&mut self) -> &mut List<ThreadRef> {
         &mut self.g_alive
     }

src/main.rs

@@ -1,4 +1,7 @@
-
+#![doc(
+    html_logo_url = "https://gitlab.istic.univ-rennes1.fr/simpleos/burritos/-/raw/main/assets/logo/logo.svg",
+    html_favicon_url = "https://gitlab.istic.univ-rennes1.fr/simpleos/burritos/-/raw/main/assets/logo/logo.svg")
+]
 #![warn(missing_docs)]
 #![warn(clippy::missing_docs_in_private_items)]
 
@@ -7,10 +10,8 @@
 //! Burritos is an educational operating system written in Rust
 //! running on RISC-V emulator.
 
-/// Contain hardware simulated part of the machine
 mod simulator;
 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};
@@ -59,7 +60,6 @@ fn main() {
     system.get_thread_manager().set_sp_max(sp_max);
     system.get_thread_manager().start_thread(Rc::clone(&thread_exec), owner1, loader.elf_header.entrypoint, sp_max, -1);
     
-    
     let to_run = system.get_thread_manager().find_next_to_run().unwrap();
     system.get_thread_manager().switch_to(&mut machine, Rc::clone(&to_run));
 

src/simulator/interrupt.rs

@@ -1,17 +1,38 @@
+//! # Interrupt
+//!
+//! This module contains an interrupt Handler.
+//! The methodes one_trick and idle aren't implemented for now
 
+/// # Interrupt
+///
+/// Interrupt Handler
 #[derive(PartialEq)]
 pub struct Interrupt {
+    /// Current Status
     level: InterruptStatus
 }
 
 impl Interrupt {
 
+    /// Interrupt constructor
+    ///
+    /// ### Return
+    /// Interrupt with status Off
     pub fn new() -> Self {
         Self {
             level: InterruptStatus::InterruptOff
         }
     }
 
+    /// Interrupt setter
+    /// Change the value of the Interrupt
+    ///
+    /// ### Parameters
+    /// - **self** the interupt handler
+    /// - **new_status** the new status value
+    ///
+    /// ### return
+    /// The previus status
     pub fn set_status(&mut self, new_status: InterruptStatus) -> InterruptStatus {
         let old = self.level;
         self.level = new_status;
@@ -25,6 +46,7 @@ impl Interrupt {
         todo!();
     }
 
+    /// Interupt getter
     pub fn get_status(&self) -> InterruptStatus {
         self.level
     }

src/simulator/loader.rs

@@ -1,9 +1,25 @@
+//! # Loader
+//!
+//! This module contains a loader for file section.
+//! Following the common standard file format for executable files
+//! [ELF (Executable and Linkable Format)](https://en.wikipedia.org/wiki/Executable_and_Linkable_Forma)
+//!
+//! It's used to charge a programme into the machine from a binary file (.guac files)
+//!
+//!  Basic usage:
+//!
+//! ```
+//! let args = Args::parse();
+//! let mut machine = Machine::new(args.debug & 1 != 0, read_settings().unwrap());
+//! let (loader, ptr) = loader::Loader::new(args.executable.as_str(), &mut machine, 0).expect("An error occured while parsing the program");
+//! ```
+
 use crate::Machine;
 use std::fs;
 use std::io::Read;
 
 /// The elf header defines principes aspects of the binary files, it's place at the start of the file
-/// see <https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header> for more informations
+/// see [ELF file Header](https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header) for more informations
 pub struct ElfHeader {
     /// Defines whether the file is big or little endian
     /// true correspond to big endian, false otherwise

src/simulator/mem_cmp.rs

@@ -1,14 +1,31 @@
-///! FILE.TXT FORMAT Representing machine memory memory
-/// - PC
-/// - SP
-/// - Section_1
-/// - Section_2
-/// - ...
-/// - Section_n
-/// 
-/// Each section is divided in 3 parts, on two lines of text
-/// addr SPACE len
-/// content
+//! # Memory Comparator
+//!
+//! This module contains a MemChecker.
+//!
+//! It's used to compare state memory obtained after a dump memory from NachOS and BurritOS.
+//!
+//! This module is used exclusively for testing the instruction simulator.
+//!
+//! Basic usage:
+//!
+//! ```
+//! let mut m = Machine::new(true, get_debug_configuration());
+//! let mut MemChecker = mem_cmp::MemChecker::from(get_full_path!("memory", expr));
+//! mem_cmp::MemChecker::fill_memory_from_mem_checker(&MemChecker, &mut m);
+//! ```
+//!
+//!
+//! ! FILE.TXT FORMAT Representing machine memory memory
+//! - PC
+//! - SP
+//! - Section_1
+//! - Section_2
+//! - ...
+//! - Section_n
+//!
+//! Each section is divided in 3 parts, on two lines of text
+//! addr SPACE len
+//! content
 
 use std::{fs, io::{BufRead, BufReader, Lines, Error}};
 use crate::Machine;
@@ -102,7 +119,7 @@ impl MemChecker {
     /// Extract the values of pc, sp and sections
     ///
     /// ### Parameter
-    /// -**path** addr to the file
+    /// - **path** addr to the file
     ///
     /// ### Return
     /// Mem-checker filled

src/simulator/mmu.rs

@@ -1,18 +1,38 @@
+//! # MMU
+//!
+//! This module contains a MMU implementation
+//!
+//! This part isn't tested nor integrated to BurritOS because of the lack of pagination implementation
+//!
+//!
+
 use crate::simulator::translationtable::*;
 use crate::simulator::machine::*;
 
+/// # Memory Management Unit
+/// An MMU possesses a single reference to a translation table
+/// This table is associated to the current process
 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
-     */
+    /// Reference to a page table
     translationTable : Option<&'a mut TranslationTable>,
+    /// The number of physique pages
     numPhyPages : u64,
+    /// Size of each page
     pageSize    : u64
 }
 
 impl <'a>MMU <'_>{
 
+    /// Create a MMU with a None reference for the translation table
+    ///
+    /// ### Parameters
+    ///
+    /// - **numPhyPages** the number of physique pages
+    /// - **pageSize** the size of a page
+    ///
+    /// ### Return
+    ///
+    /// MMU with None reference and the value for the number of physical pages and pae size associated
     fn create(numPhyPages: u64, pageSize: u64) -> MMU <'a>{
         MMU {
             translationTable : None,

src/simulator/mod.rs

@@ -1,3 +1,12 @@
+//! This module implement an Instruction simulator
+//! with all the simulated hardware requested to run the Machine :
+//! - **MMU**
+//! - **Processor**
+//! - **RAM**
+//! - **Interruption Controler**
+//!
+//! The disk, the console and the serial coupler aren't implmented for now
+//!
 pub mod machine;
 pub mod error;
 pub mod instruction;

src/simulator/translationtable.rs

@@ -1,23 +1,35 @@
-//Nombre maximum de correspondances dans une table des pages
-//Cette donnée devra a terme etre recupérée depuis un fichier de configuration
+//! # Translation Table
+//!
+//! This module implement a trnslation table used for fot the MMU Emulator
+//!
+//! This part isn't tested nor integrated to BurritOS,
+//! but will be useful in the futur when the pagination will be implemented.
+//!
+//! It contains:
+//! - all the setters and getters for translation table
+//! - modificaters of table values
+
+
+/// Maximum number in a Page Table
+/// For a futur evolution of program, this value should be load from a configuration file
 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
- */
+/// Translation Table corresponding to a process
+/// An iteration of type TranslationTable should be possesses by an oject of type Process
 pub struct TranslationTable{
-    //capacité de cette table <=> nombre de correspondances possibles
-    //A voir si cette donnée doit etre immuable
+    /// Table size <=> nb of possible translation
     pub maxNumPages : u64,
 
-    //la table en question
-    //Vec implemente le trait Index, donc un bon choix
+    ///The table *Vec impemente Index Trait*
     pub pageTable : Vec<PageTableEntry>
 }
 
 impl TranslationTable {
 
+    /// TranslationTable constructor
+    ///
+    /// ### Return
+    /// TranslationTable with an empty Vector
     pub fn create() -> TranslationTable {
 
         let mut tmp_vec : Vec<PageTableEntry> = Vec::new();

src/utility/cfg.rs

@@ -104,6 +104,10 @@ pub fn get_debug_configuration() -> Settings {
 }
 
 /// Removes comments and empty lines
+/// Filters out empty lines and comments from the reader `BufReader`.
+/// 
+/// Returns a [`Vec<String>`], each entry containing a valid
+/// line from the input file.
 fn filter_garbage<R: std::io::Read>(reader: BufReader<R>) -> Vec<String> {
     reader.lines()
         .map(|l| l.unwrap())
@@ -111,11 +115,13 @@ fn filter_garbage<R: std::io::Read>(reader: BufReader<R>) -> Vec<String> {
         .collect()
 }
 
-
 /// Inserts user settings into setting map
+/// Adds a <K, V> pair to a [`Settings`] map.
+/// 
+/// Returns the updated [`Settings`].
 fn update_settings_map(mut settings_map: Settings, key: &str, setting: &str) -> Settings {
     let key = MachineSettingKey::from(key);
-    let setting = setting.parse::<u64>().unwrap_or(0);
+    let setting = str::parse::<u64>(setting).unwrap_or(0);
     settings_map.insert(key, setting);
     settings_map
 }

src/utility/mod.rs

@@ -1,3 +1,6 @@
+//! This module contains data type definitions used in other parts the BurritOS
+//! They are separated from the rest of the operating system so as to promote
+//! reusability and to separate data constructs proper from state and actions.
 pub mod list;
 pub mod objaddr;
 pub mod cfg;

src/utility/objaddr.rs

@@ -17,9 +17,13 @@ use crate::kernel::{synch::{ Semaphore, Lock }, thread::Thread};
 /// calls.
 #[derive(PartialEq)]
 pub struct ObjAddr {
+    /// Id of the last added object
     last_id: i32,
+    /// List of [Semaphore] added in this struct. Each is keyed with a unique i32 id.
     semaphores: HashMap<i32, Semaphore>,
+    /// List of [Lock] added in this struct. Each is keyed with a unique i32 id.
     locks: HashMap<i32, Lock>,
+    /// List of threads known by this instance of ObjAddr (useful for managing lock ownership)
     threads: HashMap<i32, Rc<RefCell<Thread>>>,
 }
 

test/syscall_tests/Makefile

@@ -1,4 +1,4 @@
-PROGRAMS = halt.guac prints.guac producteur_consommateur.guac join.guac matmult.guac
+PROGRAMS = halt.guac prints.guac producteur_consommateur.guac lock.guac join.guac matmult.guac
 TOPDIR = ../..
 include $(TOPDIR)/Makefile.rules
 

test/syscall_tests/lock.c

@@ -0,0 +1,29 @@
+#include "userlib/syscall.h"
+#include "userlib/libnachos.h"
+
+LockId mutex;
+int glob_int = 0;
+
+void increment(void){
+  LockAcquire(mutex);
+  glob_int++;
+  LockRelease(mutex);
+}
+
+void counter(int n){
+  for (int i = 0; i < 50; i++){
+    increment();
+  }
+}
+
+int main(void){
+  mutex = LockCreate("Lock_debug");
+
+  ThreadId th1 = threadCreate("Thread1", (VoidNoArgFunctionPtr) counter);
+  ThreadId th2 = threadCreate("Thread2",(VoidNoArgFunctionPtr) counter);
+  
+  Join(th1);
+  Join(th2);
+  Exit(glob_int);
+  return 0;
+}

test/syscall_tests/prints.c

@@ -2,10 +2,53 @@
 #include "userlib/libnachos.h"
 
 int main() {
-    n_printf("Hello World 1\n");
-    n_printf("Hello World 2\n");
-    n_printf("Hello World 3\n");
-    n_printf("Hello World 4\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&##BBGGGPPGGGBB##&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&#G5J?!~^::............::^~!?J5G#&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@&B5?!^:....:^^~!!7777??7777!!~~^::...:^!JPB&@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@B57^....^~!?JJYYY5555555555555555Y5PGP57~::..:^75B@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@&G?~. .:~7?JY55555YYYYYYYYYYYYYYYYY5PB##BPY???7!~^:..:~JG&@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@BJ~. .^!?Y5555YYYYYYYYYYYYYYYYYYYY5PB##B5J?77???????7!~^:.:~JB@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@&P!. .^!JY55YYYYYYYYYYYYYYYYYYYYYY5PB##B5J?77??????????????7~^:.:!P&@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@&Y^..:~?Y55YYYYYYYYYYYYYYYYYYYYYY5PB##B5J?77????????????????????7~:.:~5&@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@&5^..:!J55YYYYYYYYYYYYYYYYYYYYYY5PB##B5J?77?????????????????????????7~^::~5@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@G~..:!Y55YYYYYYYYYYYYYYYYYYYYY5PB##B5J?77??????????????????????????????7~:::!B@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@&J...~J55YYYYYYYYYYYYYYYYYYYY5PB##B5J?77??????????????????????????????777?Y57:::J&@@@@@@@@@\n");
+    n_printf("@@@@@@@@#!..:7Y5YYYYYYYYYYYYYYYYYYY5PB##B5J?77??????????????????????????????777?YPB##G?^::7#@@@@@@@@\n");
+    n_printf("@@@@@@@G^..^J5YYYYYYYYYYYYYYYYYY5PB##B5J?77??????????????????????????????777?YPB##GP5Y5J~::~B@@@@@@@\n");
+    n_printf("@@@@@@G^..^Y5YYYYYYYYYYYYYYYY5PB##B5J?77??????????????????????????????777?YPB##GP55Y5555Y~::^B@@@@@@\n");
+    n_printf("@@@@@B^..^Y5YYYYYYYYYYYYYY5PB##B5J?77??????????????????????????????777?YPB##GP5YYYY555555Y~::~B@@@@@\n");
+    n_printf("@@@@&!..^J5YYYYYYYYYYYY5PB##B5J?77??????????????????????????????777?YPB#BGPYYYYYY555555555Y~::7&@@@@\n");
+    n_printf("@@@@J..:?5YYYYYYYYYY5PB##B5J?77??????????????????????????????777?YPB#BG5YYYYYYY55YY55555555J^::Y@@@@\n");
+    n_printf("@@@B:..~5YYYYYYYY5PB##G5J?77??????????????????????????????777?YPB#BG5YYYYYYYY5YYY55555555555!::^#@@@\n");
+    n_printf("@@@?..:JYYYYYY5PB##G5J?77??????????????????????????????777?YPB#BG5YYYYYYYYYYYYY55YY555555555Y^::J@@@\n");
+    n_printf("@@&^..~YYYY5PB##G5J?77??????????????????????????????777?YPB#BG5YYYYYYYYYYYYYYYYYY5555Y5555555!::~&@@\n");
+    n_printf("@@G:..7Y5PB##G5J?77??????????????????????????????777?YPB#BG5YJYYYYYYYYYYYYYYYYY55YYY555555555?::^B@@\n");
+    n_printf("@@5:..YB##G5J?77??????????????????????????????777?YPB#BG5JJJYYYJYYYYYYYYYYYYYY5YY5555Y5555555J:^^P@@\n");
+    n_printf("@@5:..PB5J?77??????????????????????????????777?YGB#BG5JJJYYJYYYYYYYYYYYYYYYYYYY55Y55555555555J:^^5@@\n");
+    n_printf("@@5:..7?77??????????????????????????????777?YPB#BG5JJJJJJJJYYYYYYYYYYYYYYYYYYY5YY5Y5555555555J:^^P@@\n");
+    n_printf("@@G:..~??????????????????????????????777?YGB#BPYJJJJJJJJJJJYYYYYYYYYYYYYYYYYYYY5YY55555555555?:^^B@@\n");
+    n_printf("@@&^..^???????????????????????????777?YGB#BPYJ?JJJJJJJJJJJYYJYYYYYYYYYYYYYYYYY5YY5Y5555555555!^:~@@@\n");
+    n_printf("@@@?.::7???????????????????????777?YGB#BPYJ???JJJJJJJJJJJJJYYYYYYYYYYYYYYYYYYYYYYY5555555555Y^^:J@@@\n");
+    n_printf("@@@#:..^????????????????????777?YG##BPYJ????JJJJJJJJJJJJJJYJJYYYYYYYYYYYYYYYYY5YYYY555555555!^^^#@@@\n");
+    n_printf("@@@@J.::!????????????????777?YG##BPY???????JJJJJJJJJJJJJJJJYYYYYYYYYYYYYYYYYY5YYY5555555555J^^:Y@@@@\n");
+    n_printf("@@@@&!..:7????????????777?YGB#BPJ????????????JJJJJJJJJJJJYYJJYYYYYYYYYYYYYYYYYY55YY5555555Y~::7&@@@@\n");
+    n_printf("@@@@@B^.:^7????????777?YGB#BPJ?7???????????JJJ?JJJJJJJJJJJJYYYYJYYYYYYYYYYYYYYYYY5555Y555Y~^:~B@@@@@\n");
+    n_printf("@@@@@@G^.:^7????777?YGB#BPJ?7????????????????JJJJJJJJJJJJYYJJYYYYYYYYYYYYYYYYYY55YYY5555Y~::~B@@@@@@\n");
+    n_printf("@@@@@@@B^.:^7?77?YGB#BPJ?77??7?????????????JJJ?JJJJJJJJJJJJYYYYJYYYYYYYYYYYYYYYYY5555Y5J~::~B@@@@@@@\n");
+    n_printf("@@@@@@@@#!..:!YG##BPJ?77?????????????????????JJJJJJJJJJJJYYJYYYYYYYYYYYYYYYYYYY55YYY55?^::7#@@@@@@@@\n");
+    n_printf("@@@@@@@@@&J:.:7PPY?77???7????7??????????????JJ?JJJJJJJJJJJJYYYYJYYYYYYYYYYYYYY5YY555J!^:^Y&@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@G!..:~7?????????????????????????JJJJJJJJJJJJJJYYJYYYYYYYYYYYYYYYYYYY555Y7^::7G@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@5~..:~7????????????????????????JJJJJJJJJJJJJJJYJYYYYYYYYYYYYYYYYY5YY7^::~5@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@&Y~..:~7?????????????????????JJJJJJJJJJJJJJJJYYYYYYYYYYYYYYYYY5YJ!^::!5&@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@&P!:.:^~7???????????????????JJJJJJJJJJJJJJJJJYYYYYYYYYYYYYYJ7~::^7P&@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@BJ~:.:^~77??????????????JJ?JJJJJJJJJJJJJYYYYYYYYYYYYYJ7~^::!YB@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@&GJ~:.::~!!7????????????JJJJJJJJJJJJJYJJYYYYYYJ?7!^::^!JG&@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@B5?~::::^~~!7????JJJJJJJJJJJJYYJJJJJJ?77!~^::^~?5B@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@&BPJ7~^:::::^~~~!!77777777!!!~~^^::::^~7JPB&@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&#G5Y?7!~^^::::::::::::^~~!7JYPG#&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&&##BGGGGGGGBB##&&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
+    n_printf("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
     Shutdown();
     return 0;
 }