用Clang进行动态检测 [英] Dynamic instrumentation with Clang

问题描述

我正在尝试通过使用C（可能是C ++）进行一些动态代码检测来加速使用Clang，在该过程中我将获取源文件并生成检测输出。我想在任何代码块的开头添加一个函数调用，并更改所有布尔表达式以调用某个函数，以便我也可以跟踪它。例如：

  foo = a&& （b || c）; 
  

将变成类似以下内容：

  foo = EXPR_AND（a，EXPR_OR（b，c））; 
  

因此，我可以跟踪发生的所有条件组合。

我认为使用RecursiveASTVisitor是最好的方法，但是是否有一种简单的方法来输出我访问的每个节点的C代码？

任何

注意：经过进一步的研究，我才发现libclang看起来可能是我最好的选择。

朋友再加上重写器，我可能会满足我的需求。任何指向好的示例的指针（我刚刚发现出色的Apple开发人员在libclang上观看视频）都很棒。

解决方案

示例，请参见此项目。

它使用clang为了检测调用函数的进入和退出，还检查传递参数的类型。

I'm trying to get up to speed on using Clang by doing a bit of dynamic code instrumentation with C (and maybe C++) where I take a source file and generate an instrumented output. I'd like to add a function call at the beginning of any block and also change all boolean expressions to call some function so I can track that too. For example:

foo = a && (b || c);

would become something like:

foo = EXPR_AND(a, EXPR_OR(b, c));

and thus I can track all combinations of conditions that occur.

I assume using a RecursiveASTVisitor would be the best approach, but is there an easy way to output the C code for each node I visit?

Any suggestions of what to look at to accomplish something like this would be most appreciated!

Note: After some further investigation, I just discovered libclang which looks like it could be my best friend. Coupled with a rewriter, I might just have what I need. Any pointers to good examples (I just found the excellent Apple developers meeting video on libclang) would be great.

解决方案

For a good example see this project.

It uses clang in order to instrument call function entering and exit, and it also inspects types of passed arguments.

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