pintos学习笔记1

2015-09-16 pintos pintos

今天我看了《煎饼侠》和《小森林》夏秋的前面一点点。
《煎饼侠》找了挺多人，挺不可思议的，看过一个人写过大鹏。

很喜欢《小森林》的感觉，像一个梦.

Thread

struct thread

4 kB +---------------------------------+
     |          kernel stack           |
     |                |                |
     |                |                |
     |                V                |
     |         grows downward          |
     |                                 |
     |                                 |
     |                                 |
     |                                 |
     |                                 |
     |                                 |
     |                                 |
     |                                 |
     +---------------------------------+
     |              magic              |
     |                :                |
     |                :                |
     |               name              |
     |              status             |
     |               tid               |
0 kB +---------------------------------+

tid

线程标识符
tid_t，int类型
从1开始，为了初始化进程

status

THREAD_RUNNING
- thread_ current()返回进行中的线程
THREAD_READY
- doubly LinkedList
THREAD_BLOCKED
- 调用thread_unblock()进入THREAD_READY
THREAD_DYING

name

stack

uint8_t *
when the CPU switches to another thread,this member saves the thread’s stack pointer
When an interrupt occurs, whether in the kernel or a user program, an struct intr_ frame is pushed onto the stack

int priority

ranging from PRI_MIN (0) to PRI_MAX (63).

struct list_elem allelem

link the thread into the list of all threads

struct list_elem elem

put the thread into doubly linked lists, either readylist (the list of threads ready to run) or a list of threads waiting on a semaphore in sema down()

uint32_t * pagedir

unsigned magic

detect stack overﬂow