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进程 #85

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hushicai opened this issue Nov 6, 2019 · 2 comments
Open

进程 #85

hushicai opened this issue Nov 6, 2019 · 2 comments

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@hushicai
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hushicai commented Nov 6, 2019

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@hushicai
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hushicai commented Nov 6, 2019 •
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Linux 32位操作系统，进程的内存空间：

image

更详细的内存空间：

image

参考In-Memory Layout of a Program (Process)

@hushicai
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hushicai commented Nov 14, 2019 •
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进程间通信

每个进程都有各自不同的用户地址空间，任何一个进程的全局变量在另一个进程中都不可见，进程之间要交换数据必须通过内核，在内核中开辟一块缓冲区，进程1把数据从用户空间拷到内核缓冲区，进程2再从内核缓冲区把数据读走，内核提供的这种机制称为进程间通信（IPC，Inter-Process Communication）。

image

参考https://www.jianshu.com/p/c1015f5ffa74

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