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Debug XV6

· Jahjah

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Clone 代码

git clone https://github.com/mit-pdos/xv6-riscv

下载工具

tools

# Debian or Ubuntu
sudo apt-get install git build-essential gdb-multiarch qemu-system-misc gcc-riscv64-linux-gnu binutils-riscv64-linux-gnu

编译

make qemu

调试

gdb

make qemu-gdb

然后在另一个窗口打开gdb

gdb-multiarch

常用的一些命令

加载配置文件

gdb-multiarch -x .gdbinit

指定要调试的可执行文件

file kernel/kernel

设置断点

b kernel/main.c:100

打印变量

p i

查看调用栈

bt

vscode

生成compile commands

bear -- make qemu

vscode调试配置文件

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug xv6",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/kernel/kernel",
            "args": [],
            "stopAtEntry": true,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "/usr/bin/gdb-multiarch",
            "miDebuggerServerAddress": "localhost:25000",
            "setupCommands": [
                {
                    "description": "为 gdb 启用整齐打印",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },
                {
                    "description": "将反汇编风格设置为 Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                },
            ]
        }
    ]
}