Go 调试利器 delve 使用

Delve 是一个专门为调试 go 程序而生的调试工具，它比 GDB 更强大，尤其时调试多 goroutine 高并发的 go 程序。文章源自编程技术分享-https://mervyn.life/d4defc41.html

安装 Delve

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

断点调试

启动调试

Devle 是一个非常棒的 go 调试工具，支持多种调试方式，直接运行调试，或者 attach 到一个正在运行中的 go 程序，进行调试。文章源自编程技术分享-https://mervyn.life/d4defc41.html

• 直接调试
  通过 dlv debug 命令进入调试环境

➜  demo dlv debug demo.go
Type 'help' for list of commands.
(dlv)

• 通过 attach 调试
  例：

go build main.go
./main
# 通过 ps 命令查看对应程序的 pid
ps aux|grep main

dlv attach 29260

可用的调试命令

➜  demo dlv debug demo.go
Type 'help' for list of commands.
(dlv) help
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.
    disassemble (alias: disass) - Disassembler.
    down ------------------------ Move the current frame down.
    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.
Type help followed by a command for full documentation.