使用VSCode對Golang程序進行調試時會遇到數據截斷問題,string只顯示前64個字符,array只顯示前64個數據。經查dlv是支持以參數方式來控制的。
發現VSCode的Golang插件裡面有個叫做go.delveConfig
的配置,是可以設置dlv參數的。分享一下我的整個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maxStringLen
、maxArrayValues
、maxVariableRecurse
這三個字段。
參考:https://stackoverflow.com/questions/52416263/how-do-i-print-the-full-value-of-a-string-variable-in-delve
ps:下面看下Golang dlv 工具debug 調試注意項
總結一下關於Go 的調試工具dlv:https://github.com/derekparker/delve 的使用注意項。
安裝:
go get -u github.com/go-delve/delve/cmd/dlv
配置:
以Centos為例
export GOROOT=/usr/lib/golang export GOPATH=$HOME/go export PATH=$PATH:$GOPATH/bin
使用
以某go服務為例:
dlv debug xxx.go
指定需要debug的文件
進入dlv交互式窗口後,b
指定斷點
r arg 指定運行參數
n 執行一行
c 運行至斷點或程序結束
dlv debug /home/xxx/server.go (dlv) b /home/xxx/server.go:258 (dlv) r 1 (dlv) n (dlv) c
注意: b
指定斷點時,若該行號對應的代碼內容為無具體語義的代碼(括號、註釋等),則會報錯:
Command failed: could not find /home/xxx/server.go:258
此時可用list 命令先查看上下文代碼,避免將無具體語義的代碼設為斷點。
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.
continue (alias: c) --------- Run until breakpoint or program termination.
deferred -------------------- Executes command in the context of a deferred call.
disassemble (alias: disass) - Disassembler.
down ------------------------ Move the current frame down.
edit (alias: ed) ------------ Open where you are in $DELVE_EDITOR or $EDITOR
exit (alias: quit | q) ------ Exit the debugger.
frame ----------------------- Set the current frame, or execute command on a different frame.
funcs ----------------------- Print list of functions.
goroutine ------------------- Shows or changes current goroutine
goroutines ------------------ List program goroutines.
help (alias: h) ------------- Prints the help message.
list (alias: ls | l) -------- Show source code.
locals ---------------------- Print local variables.
next (alias: n) ------------- Step over to next source line.
on -------------------------- Executes a command when a breakpoint is hit.
print (alias: p) ------------ Evaluate an expression.
regs ------------------------ Print contents of CPU registers.
restart (alias: r) ---------- Restart process.
set ------------------------- Changes the value of a variable.
source ---------------------- Executes a file containing a list of delve commands
sources --------------------- Print list of source files.
stack (alias: bt) ----------- Print stack trace.
step (alias: s) ------------- Single step through program.
step-instruction (alias: si) Single step a single cpu instruction.
stepout --------------------- Step out of the current function.
thread (alias: tr) ---------- Switch to the specified thread.
threads --------------------- Print out info for every traced thread.
trace (alias: t) ------------ Set tracepoint.
types ----------------------- Print list of types
up -------------------------- Move the current frame up.
vars ------------------------ Print package variables.
whatis ---------------------- Prints type of an expression.
[ljg58026 ] VSCode Golang dlv調試數據截斷問題及處理方法已經有278次圍觀