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Ubuntu 系统安装 go 调试工具 delve

安装 go

1. 下载 go 二进制

tar -zxvf go1.14.1.linux-amd64.tar.gz
  • 解压后会出现一个 go 目录，进入 go/bin 目录下，会看到二进制文件，可以运行查看下版本：
lhx@lhx-ubuntu:~/go/bin$ ls
go  gofmt
lhx@lhx-ubuntu:~/go/bin$ ./go version
go version go1.14.1 linux/amd64

2. 配置 go 环境变量

  • 添加 go 到 PATH 变量
    export PATH=/home/lhx/go/bin:$PATH

  • 设置 GOPATH（不能和GOROOT路径一致）

export GOPATH=/home/lhx/gopath

  • 通过命令 go env可以查看变量：
GOPATH="/home/lhx/gopath"
GOROOT="/home/lhx/go"

安装 delve

1. 下载 delve 源码

  • 从 github 下载源码
git clone https://github.com/go-delve/delve.git $GOPATH/src/github.com/go-delve/delve
  • 网速慢的话，可以从 gitcode 镜像下载：
git clone https://gitcode.net/mirrors/derekparker/delve.git $GOPATH/src/github.com/go-delve/delve

2. 安装 delve

  • 进入 delve 目录，通过命令 make install安装。
  • 由于 golang.org 被墙了，可能会报错：
lhx@ubuntu:~/gopath/src/github.com/go-delve/delve$ make install
go: github.com/cosiner/argv@v0.0.0-20170225145430-13bacc38a0a5: Get "https://proxy.golang.org/github.com/cosiner/argv/@v/v0.0.0-20170225145430-13bacc38a0a5.mod": dial tcp 172.217.160.113:443: connect: connection refused
make: *** [Makefile:10：install] 错误 1
  • 解决方法：改成中国的 Go 模块代理，在终端执行：
go env -w GO111MODULE=on
go env -w GOPROXY=https://goproxy.cn,direct
  • 可以通过 go env再查看 GOPROXY 变量。
  • 此时make install就成功了：
lhx@lhx-ubuntu:~/gopath/src/github.com/go-delve/delve$ make install
go: downloading github.com/spf13/cobra v0.0.0-20170417170307-b6cb39589372
go: downloading github.com/spf13/pflag v0.0.0-20170417173400-9e4c21054fa1
go install "-ldflags=-X main.Build=237c5026f40e38d2dd6f62a7362de7b25b00c1c7" github.com/go-delve/delve/cmd/dlv
go: downloading github.com/sirupsen/logrus v1.6.0
go: downloading github.com/cpuguy83/go-md2man v1.0.10
go: downloading gopkg.in/yaml.v2 v2.2.1
go: downloading github.com/peterh/liner v0.0.0-20170317030525-88609521dc4b
go: downloading github.com/cosiner/argv v0.0.0-20170225145430-13bacc38a0a5
go: downloading go.starlark.net v0.0.0-20190702223751-32f345186213
go: downloading golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb
go: downloading github.com/google/go-dap v0.2.0
go: downloading github.com/mattn/go-isatty v0.0.3
go: downloading golang.org/x/arch v0.0.0-20190927153633-4e8777c89be4
go: downloading github.com/russross/blackfriday v1.5.2
go: downloading github.com/hashicorp/golang-lru v0.5.4
  • 安装成功后，可以进入到 GOPATH，会发现有 bin 目录，里面有 dlv 二进制文件，可以运行查看 delve 版本号：
lhx@lhx-ubuntu:~/gopath/src/github.com/go-delve/delve$ cd $GOPATH
lhx@lhx-ubuntu:~/gopath$ ls
bin  pkg  src
lhx@lhx-ubuntu:~/gopath$ cd bin/
lhx@lhx-ubuntu:~/gopath/bin$ ls
dlv
lhx@lhx-ubuntu:~/gopath/bin$ ./dlv version
Delve Debugger
Version: 1.4.0
Build: 237c5026f40e38d2dd6f62a7362de7b25b00c1c7
  • 添加$GOPATH/bin到环境变量，即可在任意位置执行 dlv 命令：
export PATH=/home/lhx/gopath/bin:PATH

3. 测试 delve

  • 写一个简单的 hello word 程序测试，命名为 main.go ：
package main

import "fmt"

func main() {
    fmt.Println("hello world")
}
  • 开始调试：
lhx@lhx-ubuntu:~/gopath/bin$ ./dlv debug main.go 
Type 'help' for list of commands.
(dlv)
  • 通过命令 help查看帮助信息：
(dlv) help
The following commands are available:

Running the program:
    call ------------------------ Resumes process, injecting a function call (EXPERIMENTAL!!!)
    continue (alias: c) --------- Run until breakpoint or program termination.
    next (alias: n) ------------- Step over to next source line.
    restart (alias: r) ---------- Restart process.
    step (alias: s) ------------- Single step through program.
    step-instruction (alias: si)  Single step a single cpu instruction.
    stepout (alias: so) --------- Step out of the current function.

Manipulating breakpoints:
    break (alias: b) ------- Sets a breakpoint.
    breakpoints (alias: bp)  Print out info for active breakpoints.
    clear ------------------ Deletes breakpoint.
    clearall --------------- Deletes multiple breakpoints.
    condition (alias: cond)  Set breakpoint condition.
    on --------------------- Executes a command when a breakpoint is hit.
    trace (alias: t) ------- Set tracepoint.

Viewing program variables and memory:
    args ----------------- Print function arguments.
    display -------------- Print value of an expression every time the program stops.
    examinemem (alias: x)  Examine memory:
    locals --------------- Print local variables.
    print (alias: p) ----- Evaluate an expression.
    regs ----------------- Print contents of CPU registers.
    set ------------------ Changes the value of a variable.
    vars ----------------- Print package variables.
    whatis --------------- Prints type of an expression.

Listing and switching between threads and goroutines:
    goroutine (alias: gr) -- Shows or changes current goroutine
    goroutines (alias: grs)  List program goroutines.
    thread (alias: tr) ----- Switch to the specified thread.
    threads ---------------- Print out info for every traced thread.

Viewing the call stack and selecting frames:
    deferred --------- Executes command in the context of a deferred call.
    down ------------- Move the current frame down.
    frame ------------ Set the current frame, or execute command on a different frame.
    stack (alias: bt)  Print stack trace.
    up --------------- Move the current frame up.

Other commands:
    config --------------------- Changes configuration parameters.
    disassemble (alias: disass)  Disassembler.
    edit (alias: ed) ----------- Open where you are in $DELVE_EDITOR or $EDITOR
    exit (alias: quit | q) ----- Exit the debugger.
    funcs ---------------------- Print list of functions.
    help (alias: h) ------------ Prints the help message.
    libraries ------------------ List loaded dynamic libraries
    list (alias: ls | l) ------- Show source code.
    source --------------------- Executes a file containing a list of delve commands
    sources -------------------- Print list of source files.
    types ---------------------- Print list of types

Type help followed by a command for full documentation.
  • 设置 main 函数断点，继续 c、下一步 n、退出 q：
(dlv) break main.main
Breakpoint 1 set at 0x4adb8f for main.main() ./main.go:5
(dlv) c
> main.main() ./main.go:5 (hits goroutine(1):1 total:1) (PC: 0x4adb8f)
     1:	package main
     2:	
     3:	import "fmt"
     4:	
=>   5:	func main() {
     6:	    fmt.Println("hello world")
     7:	}
     8:	
(dlv) n
> main.main() ./main.go:6 (PC: 0x4adb9d)
     1:	package main
     2:	
     3:	import "fmt"
     4:	
     5:	func main() {
=>   6:	    fmt.Println("hello world")
     7:	}
     8:	
(dlv) n
hello world
> main.main() ./main.go:7 (PC: 0x4adbff)
     2:	
     3:	import "fmt"
     4:	
     5:	func main() {
     6:	    fmt.Println("hello world")
=>   7:	}
     8:	
(dlv) c
Process 24972 has exited with status 0
(dlv) q
posted @ 2022-03-25 22:55  刘跑跑  阅读(860)  评论(0)  编辑  收藏  举报