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Linux GDB高级调试:GDB调试子进程与多进程同时调试

  • 2026-06-12 03:04:17
Linux GDB高级调试:GDB调试子进程与多进程同时调试
本视频讲解如何在 Linux 下使用 GDB 调试 fork 创建的子进程。首先介绍了 fork 的基本概念和写时拷贝（COW）技术，解释了父子进程内存共享与数据独立的原理。随后重点演示了 GDB 调试子进程的方法：
使用 set follow-fork-mode child 让调试器跟随子进程；
使用 set detach-on-fork off 让父进程不自动脱离，从而实现同时调试父子进程；
通过 info inferiors 查看所有被调试的进程，并用 inferior <num> 切换上下文。
本课为后续多进程调试打下基础，适合需要分析 fork 程序行为的开发者。
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  1. CONNECT:[ UseTime:0.000698s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001171s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000617s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002082s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000892s ]
  6. SELECT * FROM `set` [ RunTime:0.000373s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001037s ]
  8. SELECT * FROM `article` WHERE `id` = 496358 LIMIT 1 [ RunTime:0.000661s ]
  9. UPDATE `article` SET `lasttime` = 1783022435 WHERE `id` = 496358 [ RunTime:0.054744s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000486s ]
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0.274309s