delve本地远程调试

### delve 开源项目地址https://github.com/go-delve/delve. 提供golang调试可以debug和attach. 安装使用go get, 同时将gopath添加进入环境变量以便于能够运行dlv工具. go get -u github.com/go-delve/delve/cmd/dlv ### 调试例子 test.go ``` package test var Test_val int = 2000 ``` main.go ``` package main import ( "dlv/test" "fmt" "log" "net/http" "os" ) const port = "8000" func main() { log.Println("main") http.HandleFunc("/hi", hi) fmt.Println("runing on port: " + port) log.Fatal(http.ListenAndServe(":"+port, nil)) } func hi(w http.ResponseWriter, r *http.Request) { hostName, _ := os.Hostname() testSet := 1000 log.Println(testSet, test.Test_val) fmt.Fprintf(w, "HostName: %s", hostName) } ``` ### debug调试 启动调试: dlv debug main.go 设置断点: b filename:fucname or filename:linenum根据行号或者函数名字添加断点 b main.main 根据函数名设置断点 b main.go:24 根据行数设置断点 查看断点：bp 条件断点：cond 2 testSet == 1000 开始运行：c 浏览器中访问：localhost:8000/hi会自动断点到24行 显示参数：args 局部变量: locals 显示变量: p hostName 显示全局：vars test.Test_val 修改变量：set testSet = 5000 继续执行：c 单行执行：n 单步执行：s 跳出函数：so 显示代码：l 删除断点：clear 1 清除断点：clear all 显示stack: stack 选择栈帧：frame 1 查看协程：gr 所有协程：grs 所有线程：threads 指定线程：thread id ### 编译选项 go build -gcflags "-N -l" ### attach调试 编译运行,查找进程id,attach进程 go build main.go main ps -aux | grep main dlv attach pid ### 远程调试 如何远程调golang程序,当要调试服务器上的golang代码时有两种方式，在服务器本地调试，在本地远程调试。 1. 登录server上安装好golang环境和dlv 2. 获取调试服务器的PID, eg：ps -aux | grep main 3. 启动调试服务器dlv attach 7148 --headless --listen=:2345 --api-version=2 --accept-multiclient 4. 本地连接服务器进行调试：dlv connect 127.0.0.1:2345 ### vscode调试环境搭建 1. 安装Go for Visual Studio Code 插件Rich Go language support for Visual Studio Code 2. 设置扩展： "go.gopath": "D:\\gopath", "go.goroot": "C:\\Go" 3. 运行命令面板执行Go:Install/Update Tool 勾选所有的的插件进行安装 ### vscode调试配置 ``` { // 使用 IntelliSense 了解相关属性。 // 悬停以查看现有属性的描述。 // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "name": "Connect to server", "type": "go", "request": "attach", "mode": "remote", "remotePath": "${workspaceFolder}", "port": 2345, "host": "127.0.0.1", "showLog": true }, { "name": "Attach to Process", "type": "go", "request": "attach", "mode": "local", "processId": 22696 }, { "name": "Launch Package", "type": "go", "request": "launch", "mode": "debug", "program": "${workspaceFolder}" }, { "name": "Launch file", "type": "go", "request": "launch", "mode": "debug", "program": "${file}" } ] } ``` 上面配置包含启动调试、attach、remote调试四种模式