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Nov 7, 2019 Replied to a topic by curiouscat › 程序员 › 开源我的一个邪恶项目 |
Jun 10, 2019 Replied to a topic by scott1990 › 程序员 › 你们的 mbp 都有配鼠标吗 ？ |
@luob 专门为了切屏买了带侧键的鼠标
Jun 5, 2019 Replied to a topic by juzipeek › Linux › Linux clone 疑问 |
例子的第 4 行有个 typo，应该是“ with initial sp2 = 0xff ”
Jun 5, 2019 Replied to a topic by juzipeek › Linux › Linux clone 疑问 |
上面是一本正经的瞎猜，说错了请多包涵
Jun 5, 2019 Replied to a topic by juzipeek › Linux › Linux clone 疑问 |
每个 process 有自己的 stack pointer （ SP ）。如果两个 process 共享 memory space 还共享 stack 的话，互相有可能会 overwrite 掉对方的 stack。
e.g.
Process 1 has initial sp1 = 0xff
Process 1 advances sp1 to 0xf0
Process 1 calls clone
Process 2 is created with initial sp = 0xff
Context switch to Process 2
Process 2 advances sp2 to 0xa0
Context switch to Process 1
Process 1 continues executing with sp1 = 0xf0
--> Content from 0xff to 0xf0 are overwritten by Process 2
所以：由于子进程和调用进程可能共享内存 => 因此子进程不可能与调用进程在同一堆栈中执行
这里并没有后半个因果关系: “由于子进程和调用进程可能共享内存，因此子进程不可能与调用进程在同一堆栈中执行。=> 共享内存会导致父子进程运行在相同的栈”
e.g.
Process 1 has initial sp1 = 0xff
Process 1 advances sp1 to 0xf0
Process 1 calls clone
Process 2 is created with initial sp = 0xff
Context switch to Process 2
Process 2 advances sp2 to 0xa0
Context switch to Process 1
Process 1 continues executing with sp1 = 0xf0
--> Content from 0xff to 0xf0 are overwritten by Process 2
所以：由于子进程和调用进程可能共享内存 => 因此子进程不可能与调用进程在同一堆栈中执行
这里并没有后半个因果关系: “由于子进程和调用进程可能共享内存，因此子进程不可能与调用进程在同一堆栈中执行。=> 共享内存会导致父子进程运行在相同的栈”
May 28, 2019 Replied to a topic by redr41n › 程序员 › MacBook Pro 13 ,Surface Laptop ,Thinkpad X1 Carbon ,XPS 13 你选啥？ |
mbp 和 linux 不完美适配，touchbar 除了增加误触毫无作用，续航及其差劲，如果不是依赖苹果服务的话不要买。依赖苹果服务的话就无视一切缺点 mbp 当仁不让最佳选择。
May 24, 2019 Replied to a topic by Breadykid › 程序员 › 大家下午困得不行得时候，都会做些什么？ |
吃味道重的薄荷味口香糖，对我很有效
May 20, 2019 Replied to a topic by jiangxinlingdu › 程序员 › IDEA 和 vscode 比较介绍，推荐那个？ |
以前也觉得 vsc 不适合大项目，但是最近在写一个不太小的 java+c 的项目，vsc 的速度感觉是秒杀 jetbrain 全家。尤其我为了省笔记本电，经常需要把编辑器关掉再开，vsc 启动也就 5 秒钟，idea 得让我电脑风扇转 2 分钟。
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