无法在gdb中设置断点 [英] Not able to set breakpoints in gdb

问题描述

我的C ++项目文件夹结构如下所示。

My C++ project folder structure is as shown below.

我试图使用gdb在我的linux机器调试程序。我的主要功能是在g2o.cpp里面g2o_cli文件夹。我可以通过

I am trying to debug the program using gdb in my linux machine. My main function is in g2o.cpp which is inside g2o_cli folder. I am able to put breakpoints in the files in this folder by

 break g2o.cpp:<line_number>

但我不能在其他文件夹的文件中放置断点，例如文件优化器.cpp在'core'文件夹中。我尝试从我的主目录提供绝对路径

But I am not able to put breakpoints in the files in other folders, for example, a file optimizer.cpp in the 'core' folder. I tried giving the absolute path from my home directory

break ~/HOME/g2o/core/optimizer.cpp:<line_number>

但它给出错误

  No source file named ~/HOME/g2o/core/optimizer.cpp

我也试过../../core/optimizer.cpp而不是绝对路径。仍然无法正常工作。

I also tried ../../core/optimizer.cpp instead of the absolute path. Still it did not work.

我看到一个类似的问题这里。但答案中提到的任何可能的原因都不适用于我的情况。文件optimizer.cpp不是共享库，整个项目是使用cmake编译的。

I saw a similar question here. But none of the possible reasons mentioned in the answer is applicable in my case. The file optimizer.cpp is not a shared library and the entire project was compiled using cmake.

gdb如何处理文件夹路径？如何给相对文件夹路径？

How does gdb take folder paths? How can I give the relative folder path?

推荐答案

你可以在x86上使用的一个脏的黑客是使用 int3 。只需在你想要断点的代码中使用语句 asm volatile（int 3）; 。

A dirty hack you can use on x86 is to use int3. Just use the statement asm volatile ("int 3"); in the code where you want the breakpoint.

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