01-编译CPython

CPython的目录结构

源码中文件夹的大致含义如下：

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cpython/
│
├── Doc      ← Source for the documentation
├── Grammar  ← The computer-readable language definition
├── Include  ← The C header files
├── Lib      ← Standard library modules written in Python
├── Mac      ← macOS support files
├── Misc     ← Miscellaneous files
├── Modules  ← Standard Library Modules written in C
├── Objects  ← Core types and the object model
├── Parser   ← The Python parser source code
├── PC       ← Windows build support files
├── PCbuild  ← Windows build support files for older Windows versions
├── Programs ← Source code for the python executable and other binaries
├── Python   ← The CPython interpreter source code
└── Tools    ← Standalone tools useful for building or extending Python
  • Grammar记录了关于python的语法定义，如tokens,grammar，CPython有专门的代码读取这些文件，再生成词法解析和语法解析的代码。
  • Objects目录里有Python的核心内置类型，与python的对象模型息息相关
  • Parser里包含了Python语言的前端，即词法解析，语法解析
  • Programs包含了Python可执行文件的入口和相关实现
  • Python目录包含了Python解释器的实现

编译CPython

首先在CPython的目录下运行configure脚本

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./configure CFLAGS="-g -O0"

继续make指令编译

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make -j4

编译成功后会有一个Python可执行文件。

CPython2-GEF插件让GDB更好用

gdb ./python调试python,想看源码用list指令就可以了，想要看反汇编用disassemble命令就可以了，但是它的风格是AT&T风格的，想要看内存用x，想要看寄存器用info命令。

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gdb -tui ./python

GEF https://github.com/hugsy/gef

安装

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bash -c "$(curl -fsSL https://gef.blah.cat/sh)"

可以使用hexdump命令

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hexdump byte &argc

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