如何在使用CMake的调试器中设置后续分支模式作为子模块 [英] How set follow-fork-mode as child in debugger using CMake

问题描述

我有Linux系统，而且我正在使用 CMake 编写使用 Clion IDE 的程序。我有一部分是我在程序中的一部分，我希望调试子进程
我从这个论坛读了几个主题，但我仍然不知道如何或在哪里可以打开这个功能：

.. :: EDIT :: ..

我相信这是很好的方法。我认为你的提示很有用，但我有一些下一个问题。在使用你的指令后，我的代码崩溃了。

  pid_t newProcessForClient = fork（）; 
  

声明：

$ b $警告：文件
/lib32/libthread_db-1.0.so自动加载已被您的
`auto自动加载-load safe-path'设置为$ debugdir：$ datadir / auto-load。警告：
无法找到匹配劣质线程库的libthread_db，线程
调试将不可用。 [切换到31667]
继续使用SIGABRT信号。

程序以SIGABRT信号终止，Aborted。程序不再存在
。

解决方案

调试设置无关与cmake。 CMAKE_CXX_FLAGS_DEBUG表示编译器的调试标志。但是，您需要将设置为follow-fork-mode子给调试器。为此，您需要执行以下步骤：

1. 在程序开始处设置一个中断点（即父项程序，而不是子程序）
   

2. 在调试器中启动程序。



3. 转到调试器控制台（带有 gdb 标签的标签），并输入 set follow-fork-mode child 和 set auto-load safe-path /


4. 继续调试

命令 set auto-load safe-path / 应根据文档切换自动加载限制。gdb。

I have Linux system, and I writing program use Clion IDE which using CMake. I have a part my in program where I would like to debug child process I read a few topic from this forum, but I still doesn't know how or where just I can turn on this function:

gdb debugging child process after fork (follow-fork-mode child configured)

How do I debug the child process after fork() in gdb?

I just have tryed to setup flag CMAKE_CXX_FLAGS_DEBUG as set follow-fork-mode child but CMake give me error. Below screenshot with all flags which are uses to compile and dbug my program. So what and where I must set this function.

..::EDIT::..

I believe that is good way. I think Your tip was useful, but I have some next problem. After using Your instructions my code is crash on line

pid_t newProcessForClient = fork();

Statement is:

(gdb) set follow-fork-mode child [New process 31667] warning: File "/lib32/libthread_db-1.0.so" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. [Switching to process 31667] Continuing with signal SIGABRT.

Program terminated with signal SIGABRT, Aborted. The program no longer exists.

解决方案

The debugging settings have nothing to do with cmake. CMAKE_CXX_FLAGS_DEBUG states the debug flags for the compiler. However, you need to tell set follow-fork-mode child to the debugger. To do this, you need the following steps:

1. Set a break point at the beginning of your program (ie. the parent program, not the child program)

2. Start the program in the debugger.

3. Go to the debugger console (tab with the label gdb) in clion and enter set follow-fork-mode child and set auto-load safe-path /
4. Continue debugging

The command set auto-load safe-path / is supposed to switch of the auto-load restrictions according to the documentation of gdb.

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