Gdb 使用方法

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已于 2024-03-18 22:45:37 修改

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于 2024-03-18 22:41:22 首次发布

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本文详细介绍了如何在Linux中使用GDB生成coredump文件，包括编译带调试符号的程序、运行GDB、设置core文件大小限制，以及在程序崩溃时创建和分析coredump的过程。

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Gdb 使用方法

https://linuxconfig.org/gdb-debugging-tutorial-for-beginners

Gdb core-dump 用法

GPT 生成记录:

To generate a core dump file using gdb (GNU Debugger), you can follow these steps:

1.Compile your program with debugging symbols enabled. This is usually done by adding the -g flag during compilation. For example:

   gcc -g my_program.c -o my_program

2.Run gdb with the executable file as an argument:

   gdb my_program

3.In the gdb prompt, set the core file size limit (optional, if not already set):

   ulimit -c unlimited

4.Start the execution of the program by typing run or r and provide any necessary command-line arguments.
5.If your program crashes or encounters a specific point of interest where you want to generate a core dump, type generate-core-file or gcore. This will create a core dump file in the current working directory.
6.You can exit gdb by typing quit or q.

Now, in the current working directory, you will find a core dump file with the name core.<process_id>; (e.g., core.1234). This core dump can be used for further analysis using the gdb tool or other debugging tools to examine the state of the program at the time of the crash.
Remember to be cautious with core dump files, as they may contain sensitive information.