Struct axprocess::Process

pub struct Process {

    pub parent: AtomicU64,
    pub children: Mutex<Vec<Arc<Process>>>,
    pub tasks: Mutex<Vec<AxTaskRef>>,
    pub fd_manager: FdManager,
    pub is_zombie: AtomicBool,
    pub exit_code: AtomicI32,
    pub memory_set: Mutex<Arc<Mutex<MemorySet>>>,
    pub heap_bottom: AtomicU64,
    pub heap_top: AtomicU64,
    pub signal_modules: Mutex<BTreeMap<u64, SignalModule>>,
    pub robust_list: Mutex<BTreeMap<u64, FutexRobustList>>,
    pub blocked_by_vfork: Mutex<bool>,
    pub file_path: Mutex<String>,
    /* private fields */
}

The process control block

Fields

parent: AtomicU64

父进程号

children: Mutex<Vec<Arc<Process>>>

子进程

tasks: Mutex<Vec<AxTaskRef>>

所管理的线程

fd_manager: FdManager

文件描述符管理器

is_zombie: AtomicBool

进程状态

exit_code: AtomicI32

退出状态码

memory_set: Mutex<Arc<Mutex<MemorySet>>>

地址空间

heap_bottom: AtomicU64

用户堆基址，任何时候堆顶都不能比这个值小，理论上讲是一个常量

heap_top: AtomicU64

当前用户堆的堆顶，不能小于基址，不能大于基址加堆的最大大小

signal_modules: Mutex<BTreeMap<u64, SignalModule>>

信号处理模块 第一维代表TaskID，第二维代表对应的信号处理模块

robust_list: Mutex<BTreeMap<u64, FutexRobustList>>

robust list存储模块 用来存储线程对共享变量的使用地址 具体使用交给了用户空间

blocked_by_vfork: Mutex<bool>

是否被vfork阻塞

file_path: Mutex<String>

该进程可执行文件所在的路径

Implementations

impl Process

pub fn pid(&self) -> u64

get the process id

pub fn get_parent(&self) -> u64

get the parent process id

pub fn set_parent(&self, parent: u64)

set the parent process id

pub fn get_exit_code(&self) -> i32

get the exit code of the process

pub fn set_exit_code(&self, exit_code: i32)

set the exit code of the process

pub fn get_zombie(&self) -> bool

whether the process is a zombie process

pub fn set_zombie(&self, status: bool)

set the process as a zombie process

pub fn get_heap_top(&self) -> u64

get the heap top of the process

pub fn set_heap_top(&self, top: u64)

set the heap top of the process

pub fn get_heap_bottom(&self) -> u64

get the heap bottom of the process

pub fn set_heap_bottom(&self, bottom: u64)

set the heap bottom of the process

pub fn set_vfork_block(&self, value: bool)

set the process as blocked by vfork

pub fn set_file_path(&self, path: String)

set the executable file path of the process

pub fn get_file_path(&self) -> String

get the executable file path of the process

pub fn get_code_if_exit(&self) -> Option<i32>

若进程运行完成，则获取其返回码 若正在运行（可能上锁或没有上锁），则返回None

impl Process

pub fn new( pid: u64, parent: u64, memory_set: Mutex<Arc<Mutex<MemorySet>>>, heap_bottom: u64, fd_table: Vec<Option<Arc<dyn FileIO>>> ) -> Self

创建一个新的进程

pub fn init(args: Vec<String>, envs: &Vec<String>) -> AxResult<AxTaskRef>

根据给定参数创建一个新的进程，作为应用程序初始进程

impl Process

pub fn exec( &self, name: String, args: Vec<String>, envs: &Vec<String> ) -> AxResult<()>

将当前进程替换为指定的用户程序 args为传入的参数 任务的统计时间会被重置

pub fn clone_task( &self, flags: CloneFlags, stack: Option<usize>, ptid: usize, tls: usize, ctid: usize, sig_child: bool ) -> AxResult<u64>

实现简易的clone系统调用 返回值为新产生的任务的id

impl Process

与地址空间相关的进程方法

pub fn manual_alloc_for_lazy(&self, addr: VirtAddr) -> AxResult<()>

alloc physical memory for lazy allocation manually

pub fn manual_alloc_range_for_lazy( &self, start: VirtAddr, end: VirtAddr ) -> AxResult<()>

alloc range physical memory for lazy allocation manually

pub fn manual_alloc_type_for_lazy<T: Sized>( &self, obj: *const T ) -> AxResult<()>

alloc physical memory with the given type size for lazy allocation manually

impl Process

与文件相关的进程方法

pub fn alloc_fd( &self, fd_table: &mut Vec<Option<Arc<dyn FileIO>>> ) -> AxResult<usize>

为进程分配一个文件描述符

pub fn get_cwd(&self) -> String

获取当前进程的工作目录

impl Process

与信号相关的方法

pub fn have_signals(&self) -> Option<usize>

查询当前任务是否存在未决信号