VSCode Golang dlv调试数据截断问题及处理方法

2020-06-24 18:02:31 来源:易采站长站 作者:王旭

使用VSCode对Golang程序进行调试时会遇到数据截断问题,string只显示前64个字符,array只显示前64个数据。经查dlv是支持以参数方式来控制的。

发现VSCode的Golang插件里面有个叫做go.delveConfig的配置,是可以设置dlv参数的。分享一下我的整个Golang配置:

"go.buildOnSave": "off",
  "go.formatTool": "goimports",
  "go.lintTool": "golangci-lint", //go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
  "go.autocompleteUnimportedPackages": true,
  "go.gotoSymbol.includeImports": true,
  "go.useLanguageServer": true,
  "go.delveConfig": {
    "dlvLoadConfig": {
      "followPointers": true,
      "maxVariableRecurse": 3,
      "maxStringLen": 1024,
      "maxArrayValues": 1024,
      "maxStructFields": -1
    },
  },
  "[go]": {
    "editor.formatOnSave": true,
    "editor.codeActionsOnSave": {
      "source.organizeImports": true
    }
  },

需要改的主要是maxStringLenmaxArrayValuesmaxVariableRecurse这三个字段。

参考:https://www.easck.com/d/file/200624/191120200624180009

ps:下面看下Golang dlv 工具debug 调试注意项

总结一下关于Go 的调试工具dlv:https://www.easck.com/d/file/200624/191820200624180011 的使用注意项。

安装:

go get -u github.com/go-delve/delve/cmd/dlv

配置:

以Centos为例

export GOROOT=/usr/lib/golang
export GOPATH=$HOME/go
export PATH=$PATH:$GOPATH/bin

使用

以某go服务为例:

dlv debug xxx.go 指定需要debug的文件 进入dlv交互式窗口后,b <filename>:<line> 指定断点 r arg 指定运行参数 n 执行一行 c 运行至断点或程序结束
dlv debug /home/xxx/server.go
(dlv) b /home/xxx/server.go:258
(dlv) r 1
(dlv) n
(dlv) c

注意: b <filename>:<line> 指定断点时,若该行号对应的代码内容为无具体语义的代码(括号、注释等),则会报错:

Command failed: could not find /home/xxx/server.go:258

此时可用list 命令先查看上下文代码,避免将无具体语义的代码设为断点。

命令集

The following commands are available:
    args ------------------------ Print function arguments.
    break (alias: b) ------------ Sets a breakpoint.
    breakpoints (alias: bp) ----- Print out info for active breakpoints.
    call ------------------------ Resumes process, injecting a function call (EXPERIMENTAL!!!)
    clear ----------------------- Deletes breakpoint.
    clearall -------------------- Deletes multiple breakpoints.
    condition (alias: cond) ----- Set breakpoint condition.
    config ---------------------- Changes configuration parameters.

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