1 vscode 需要安装remote-ssh插件

在这里插入图片描述
安装成功后，登录：

默认远程服务器的登录

ssh root@ip

注意，Linux需要设置root远程登录；

2 安装debug扩展

C\C++ extemsion Pack
C\C++

在这里插入图片描述
gdb debugger beyond用于进程attach

3 设置Attach进程

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "by-gdb",
            "request": "attach",
            "name": "Attach(gdb)",
            "program": "${fileBasenameNoExtension}",
            "cwd": "${workspaceRoot}",
            "processId": 199182
        }
    ]
}

这里

 "processId": "${command:pickRemoteProcess}",

填写mysql的进程ID；

# lsof -i:3306
COMMAND    PID  USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
mysqld  199182 mysql   17u  IPv6 1323770      0t0  TCP *:mysql (LISTEN)
#

4 断点

sql_parse.cc文件
函数：

int mysql_execute_command(THD *thd, bool first_level = false);

(备注，mysql必须是debug版本）
在这里插入图片描述

MySQL客户端登录，执行命令：

# mysql -h localhost -uroot -P3306 -p12345678
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.42-debug Source distribution

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql> show databases;
(断点）