Golang调试工具Delve安装及使用

Golang debug 推荐使用 Delve 工具，项目地址：https://github.com/derekparker/delve

go mod

# cd $GOPATH/src/
# git clone https://github.com/derekparker/delve.git
# cd delve/cmd/dlv/
# go build
# go install

go build

go: golang.org/x/crypto@v0.0.0-20180614174826-fd5f17ee7299: unrecognized import path "golang.org/x/crypto" (https fetch: Get https://golang.org/x/crypto?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
go: golang.org/x/sys@v0.0.0-20180614134839-8883426083c0: unrecognized import path "golang.org/x/sys" (https fetch: Get https://golang.org/x/sys?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
go: golang.org/x/arch@v0.0.0-20171004143515-077ac972c2e4: unrecognized import path "golang.org/x/arch" (https fetch: Get https://golang.org/x/arch?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)

go.mod

# vim ../../go.mod
# 添加下面替换：
replace (
        golang.org/x/arch v0.0.0-20171004143515-077ac972c2e4 => github.com/golang/arch v0.0.0-20171004143515-077ac972c2e4
        golang.org/x/crypto v0.0.0-20180614174826-fd5f17ee7299 => github.com/golang/crypto v0.0.0-20180614174826-fd5f17ee7299
        golang.org/x/sys v0.0.0-20180614134839-8883426083c0 => github.com/golang/sys v0.0.0-20180614134839-8883426083c0
)

然后重新编译安装，没有报错则成功。

$GOPATH/bindlv

dlvdlv --help

Available Commands:
  attach      Attach to running process and begin debugging.
  connect     Connect to a headless debug server.
  core        Examine a core dump.
  debug       Compile and begin debugging main package in current directory, or the package specified.
  exec        Execute a precompiled binary, and begin a debug session.
  help        Help about any command
  run         Deprecated command. Use 'debug' instead.
  test        Compile test binary and begin debugging program.
  trace       Compile and begin tracing program.
  version     Prints version.

dlv [command] --helpdlv debug --help

helloworldmain.go

package main

import "fmt"

func main() {
    fmt.Println("hello world")
}

debug

# cd helloword/
# go mod init
# dlv debug main.go

help

go modgo mod init

go: cannot find main module; see 'go help modules'

4.其他命令参数，自行调试。