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‎src/content/posts/FaaS/OpenFaaS.md‎

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title: OpenFaaS Week3
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published: 2025-02-14
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description: OpenFaaS 入门教程
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# image: ./cover.jpg
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image: ./images/cover1.png
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tags: [FaaS, 教程]
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category: FaaS
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draft: false
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> POST /echo/primes：返回是否为质数。
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main.rs:(我这里想实现一个2e7范围内判断质数的 `FaaS` ，需要手动配置 `Tokio` )
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```Rust
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```rust
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fn handler_service(req: Request<Body>) -> BoxFuture<'static, Result<Response<Body>, Infallible>> {
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Box::pin(async {
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match handler::echo(req).await {

‎src/content/posts/FaaS/images/cover1.png‎

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‎src/content/posts/OS/syscall/syscall.md‎

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title: syscall Week2
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published: 2025-01-22
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description: syscall 概念
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# image: ./cover.jpg
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tags: [syscall]
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category: OS
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draft: false

‎src/content/posts/docker/docker.md‎

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title: docker Week1
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published: 2025-01-20
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description: docker 教程
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# image: ./cover.jpg
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image: ./images/cover1.png
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tags: [docker, 教程]
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category: 容器
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draft: false

‎src/content/posts/docker/images/cover1.png‎

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‎src/content/posts/gdb/bomb.md‎

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title: CSAPP-bomb-lab
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published: 2025-03-03
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description: gdb & asm 优质Lab练习
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# image: ./cover.jpg
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tags: [gdb, Lab]
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image: ./images/cover-CSAPP.png
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tags: [gdb, Lab, CSAPP]
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category: 调试工具
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draft: true
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draft: false
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---
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# phase_0 env
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```sh
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wget csapp.cs.cmu.edu/3e/bomb.tar # wget -O ./bomb.tar csapp.cs.cmu.edu/3e/bomb.tar
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tar xvf bomb.tar
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# Bomb Lab文件目录如下：
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# ├── bomb
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# ├── bomb.c
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# └── README
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```
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> `la as` OR `x/5i $pc`
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# phase_1
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```sh

‎src/content/posts/gdb/command.md‎

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---
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title: gdb教程
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published: 2025-02-10
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published: 2025-02-24
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description: gdb 命令
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# image: ./cover.jpg
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image: ./images/cover1.png
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tags: [gdb, 教程]
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category: 调试工具
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draft: true
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draft: false
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---
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## breakpiont
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## ⚡ 断点调试（Breakpoints）
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```sh
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b filename.cpp:10
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info b
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d 1
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disable 1
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enable 1
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b filename.cpp:10 # 在filename.cpp的第10行设置断点
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info b # 查看所有断点信息
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d 1 # 删除编号为1的断点
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disable 1 # 临时禁用1号断点
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enable 1 # 重新启用1号断点
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```
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## watch
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## 🕵️‍♂️ 观察点（Watchpoints）
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```sh
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info wat
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watch variable_name
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wa # (监视Race共享变量)
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wa buf if buf == nullptr
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wa buf if buf == nullptr # 条件监视：当buf为null时触发
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wa -location &shell.edit_pos
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(gdb) commands
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(gdb) commands # 自定义观察点行为
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> printf "x=%d at %s:%d\n", x, $_sargv[1], $bpnum # 用户态$_sargv[1]
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> continue
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> end
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```
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## run
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## 🚀 程序运行控制（run）
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```sh
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start
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r
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n
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s
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si
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start # start 开始调试，在main函数处暂停
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r # run 开始/继续运行程序
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n # next 执行下一行（不进入函数）
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s # step 执行下一行（进入函数）
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si # step i 执行下一行指令（asm）
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finish
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c
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q
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finish # finish 执行完当前函数并暂停
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c # continue 继续运行直到下一个断点
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q # quit 退出GDB
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```
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## info
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## 📊 信息查看与变量检查（info / print）
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```sh
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info b
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info rec
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info b # 查看断点
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info rec # 查看 record
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info v
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info locals
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info locals # 查看当前栈帧的局部变量
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p variable_name
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p variable_name # 打印变量值
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p &rax
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display
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list
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display var # 每次暂停自动显示变量
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list # 显示当前位置的源代码
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info registers
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info reg # 查看寄存器值
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info threads
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thread 2
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> continue
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> end
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```
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## layout
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## 🖥️ 界面布局控制（layout）
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```sh
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la src
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la asm
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Ctrl X + 2
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Ctrl X + A
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```
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## record
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## ⏪ 执行记录与回放（record）
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```sh
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rec full
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rec stop
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info rec
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rs
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rsi
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rec full # 开始记录完整执行历史
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rec stop # 停止记录
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info rec # 显示记录信息
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info fds # 显示当前进程打开的文件描述符
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rec save filename
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rec restore filename
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rec save trace.gdb # 保存执行记录
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rec restore trace.gdb # 载入执行记录
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rs # 反向单步执行
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rsi # 反向单条指令执行
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rec goto begin
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rec goto end
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rec goto 1
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rec goto 1 # 跳转到执行历史中的第15步
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rec delete
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```
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# env
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## 🔧 环境变量设置（env）
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```sh
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set $source_file = "mysh.cpp"
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set $source_file = "mysh.cpp" # 定义自定义变量
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set environment LD_PRELOAD=mylib.so # 设置环境变量
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```
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# 并发
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## 🧵 并发调试技巧
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```sh
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thread id
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info threads
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set follow-fork-mode child #（自动追踪fork出的子进程）
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set detach-on-fork off + inferior
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thread id # 切换到线程id
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info threads # 查看所有线程
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b worker.cpp:20 thread 2 # 断点调试
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# 双进程调试模式
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set detach-on-fork off # 同时保留父子进程的调试控制
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inferior id # 切换到进程id
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info inferiors # 查看所有进程
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set follow-exec-mode new
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# fork()处理策略
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set detach-on-fork off + inferior # 保留所有fork进程
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set follow-fork-mode child # 自动追踪fork出的子进程，（默认parent）
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# execve()处理
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set follow-exec-mode new # exec函数族创建一个新进程，（默认same）
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info fds
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# 信号处理
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handle SIGINT print stop # 捕获SIGINT信号
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signal SIGINT # 手动发送信号（调试信号处理器）
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# 捕获特定系统调用
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catch syscall setpgid # 拦截进程组设置调用
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catch syscall tcsetpgrp # 拦截终端控制权转移
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call (int)tcgetpgrp(0) # 检查当前终端前台进程组
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p setsid() # 创建新会话（验证会话行为）
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handle SIGINT print stop
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# 自定义
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catch syscall setpgid
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catch syscall tcsetpgrp
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call (int)tcgetpgrp(0)
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signal SIGINT
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commands
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printf "setpgid(%d, %d) by pid=%d\n", $rdi, $rsi, $rax
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continue
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end
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break close
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bt # (程序崩溃/未预期行为/定位线程状况/)
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commands
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printf "Closing fd=%d\n", (int)$rdi
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backtrace
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continue
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end
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bt # 打印当前线程的调用栈 (程序崩溃/对未预期行为/定位线程状况/...)
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```

‎src/content/posts/gdb/images/cover-CSAPP.png‎

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‎src/content/posts/gdb/images/cover1.png‎

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