如何以编程方式在c文件的每个函数中添加打印语句？ [英] How to add print statements in every function in c files right programmatically?

问题描述

我正在研究嵌入式代码，现在完全依靠函数内部的打印来确定执行流程（没有可用的堆栈跟踪功能）。

I am working on embedded code and for now totally reliant on prints from within functions to figure out the flow of execution (there is no stack trace functionality available).

经常发生的情况是，我放了一堆打印语句，构建代码并运行它，只是意识到我也应该在其他十几个地方放打印件。然后重新开始一个小时的过程。

It often happens that I put a bunch of print statements, build my code and run it only to realize I should've put prints in a dozen other places too. And then start the hour long process again.

是否有一种简单的方法来提取我想分析的5或6个c文件并运行一些将要使用的工具并在每个函数中添加打印语句？ （显然，这必须在变量声明之后，因为它在C中）

Is there an easy way to take my 5 or 6 c files that I want to analyze and run some tool that will go in and add a print statement in each function? (this will obviously have to be after the variable declarations as this is in C)

更好的做法是，每当有一个if / else或switch时都进行打印/ case ..基本上是任何条件语句。

Even better would be to have a print each time there is an if/ else or switch/ case ..basically any conditional statements.

推荐答案

您没有说明正在使用的编译器，但是gcc有一个非常重要的条件。方便的开关：

You don't state the compiler you are using, but gcc has a very handy switch:

-finstrument-functions

在每个函数入口和出口插入一个特殊的调用。通过这种调整，您可以只编译相关文件，而无需修改源代码。

which inserts a special call at each function entry and exit. You could compile only the relevant files with this tweak, no need to modify the source code.

对您应创建的两个函数进行了调用：

The calls are made to two functions you should create:

      void __cyg_profile_func_enter (void *this_fn,
                                     void *call_site);
      void __cyg_profile_func_exit  (void *this_fn,
                                     void *call_site);

Etrace是一个用于利用此工具创建呼叫跟踪的工具，请参见 http://ndevilla.free.fr/etrace/

Etrace is a tool designed for exploiting this to create call traces, see http://ndevilla.free.fr/etrace/

这篇关于如何以编程方式在c文件的每个函数中添加打印语句？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！