C源代码中的计数函数 [英] Counting functions in C source code

问题描述

我有一个完整的C项目，可以使用gcc或Visual Studio进行构建.没有对外部库的调用.

I have complete project in C, which can be built with gcc or Visual Studio. There are no calls to external libraries.

我想知道那个项目有多少个功能.

I would like to know how many functions there is in that project.

源代码中没有未使用的函数，并且该项目附带了使用不同参数运行它的测试，因此对于动态方法(例如，运行时调用树)，我需要在每次测试后累积结果.

There are no unused functions in source code, and the project comes with tests which run it with different params, so for a dynamic approach (e.g. run-time call tree) I would need to accumulate results after each test.

有没有可以执行静态或动态分析的工具?

Are there any tools that can perform static or dynamic analysis?

推荐答案

使用gcc:

$ nm elf_file | grep "T " | grep -v " _" | wc -l

请注意，即使禁用优化，gcc仍可以内联某些函数，因此应使用以下代码进行编译:

Note that gcc can inline some functions even with optimizations disabled, so you should compile with:

-O0 -fno-builtin -fno-inline-functions-called-once

(即使在-O0中，默认情况下也会启用-finline-functions-called-once)

(-finline-functions-called-once is enabled by default even in -O0)

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