一、安装
https://github.com/go-delve/delve
直接去github上查看各种系统的安装教程，应该基本上都是 go get
二、命令
1 Available Commands: 2 attach Attach to running process and begin debugging. 3 connect Connect to a headless debug server. 4 core Examine a core dump. 5 dap [EXPERIMENTAL] Starts a TCP server communicating via Debug Adaptor Protocol (DAP). 6 debug Compile and begin debugging main package in current directory, or the package specified. 7 exec Execute a precompiled binary, and begin a debug session. 8 help Help about any command 9 run Deprecated command. Use 'debug' instead. 10 test Compile test binary and begin debugging program. 11 trace Compile and begin tracing program. 12 version Prints version. 13 14 Flags: 15 --accept-multiclient Allows a headless server to accept multiple client connections. 16 --api-version int Selects API version when headless. New clients should use v2. Can be reset via RPCServer.SetApiVersion. See Documentation/api/json-rpc/README.md. (default 1) 17 --backend string Backend selection (see 'dlv help backend'). (default "default") 18 --build-flags string Build flags, to be passed to the compiler. 19 --check-go-version Checks that the version of Go in use is compatible with Delve. (default true) 20 --headless Run debug server only, in headless mode. 21 --init string Init file, executed by the terminal client. 22 -l, --listen string Debugging server listen address. (default "127.0.0.1:0") 23 --log Enable debugging server logging. 24 --log-dest string Writes logs to the specified file or file descriptor (see 'dlv help log'). 25 --log-output string Comma separated list of components that should produce debug output (see 'dlv help log') 26 --only-same-user Only connections from the same user that started this instance of Delve are allowed to connect. (default true) 27 --wd string Working directory for running the program. (default ".") 28 29 Additional help topics: 30 dlv backend Help about the --backend flag. 31 dlv log Help about logging flags.
dlv 内部调试命令：
1 Running the program: 2 call ------------------------ Resumes process, injecting a function call (EXPERIMENTAL!!!) 3 continue (alias: c) --------- Run until breakpoint or program termination. 4 next (alias: n) ------------- Step over to next source line. 5 rebuild --------------------- Rebuild the target executable and restarts it. It does not work if the executable was not built by delve. 6 restart (alias: r) ---------- Restart process. 7 step (alias: s) ------------- Single step through program. 8 step-instruction (alias: si) Single step a single cpu instruction. 9 stepout (alias: so) --------- Step out of the current function. 10 11 Manipulating breakpoints: 12 break (alias: b) ------- Sets a breakpoint. 13 breakpoints (alias: bp) Print out info for active breakpoints. 14 clear ------------------ Deletes breakpoint. 15 clearall --------------- Deletes multiple breakpoints. 16 condition (alias: cond) Set breakpoint condition. 17 on --------------------- Executes a command when a breakpoint is hit. 18 trace (alias: t) ------- Set tracepoint. 19 20 Viewing program variables and memory: 21 args ----------------- Print function arguments. 22 display -------------- Print value of an expression every time the program stops. 23 examinemem (alias: x) Examine memory: 24 locals --------------- Print local variables. 25 print (alias: p) ----- Evaluate an expression. 26 regs ----------------- Print contents of CPU registers. 27 set ------------------ Changes the value of a variable. 28 vars ----------------- Print package variables. 29 whatis --------------- Prints type of an expression. 30 31 Listing and switching between threads and goroutines: 32 goroutine (alias: gr) -- Shows or changes current goroutine 33 goroutines (alias: grs) List program goroutines. 34 thread (alias: tr) ----- Switch to the specified thread. 35 threads ---------------- Print out info for every traced thread. 36 37 Viewing the call stack and selecting frames: 38 deferred --------- Executes command in the context of a deferred call. 39 down ------------- Move the current frame down. 40 frame ------------ Set the current frame, or execute command on a different frame. 41 stack (alias: bt) Print stack trace. 42 up --------------- Move the current frame up. 43 44 Other commands: 45 config --------------------- Changes configuration parameters. 46 disassemble (alias: disass) Disassembler. 47 edit (alias: ed) ----------- Open where you are in $DELVE_EDITOR or $EDITOR 48 exit (alias: quit | q) ----- Exit the debugger. 49 funcs ---------------------- Print list of functions. 50 help (alias: h) ------------ Prints the help message. 51 libraries ------------------ List loaded dynamic libraries 52 list (alias: ls | l) ------- Show source code. 53 source --------------------- Executes a file containing a list of delve commands 54 sources -------------------- Print list of source files. 55 types ---------------------- Print list of types
三、使用
dlv debug
- 如果位于工程目录下，可以dlv debug开始调试；
- 也可以指定目录，dlv debug GoWorks/GoDbg;
- 如果要传入参数，添加–后指定， 如dlv debug GoWorks/GoDbg – -arg1 value
dlv exec
1 lin@MacBook-Pro test % ls 2 activitycenter go.mod go.sum main.go test 3 lin@MacBook-Pro test % dlv exec ./test 4 Type 'help' for list of commands. 5 (dlv)
dlv attach
1 lin@MacBook-Pro / % ps -ef | grep test 2 501 32158 7146 0 8:12下午 ttys000 0:00.00 grep test 3 501 32156 31667 0 8:12下午 ttys001 0:00.24 ./test 4 lin@MacBook-Pro h/ % dlv attach 32156 5 Type 'help' for list of commands. 6 (dlv) -h
注意：在退出时，有可选是否要kill该进程。
dlv core
注意：dlv不支持生成core，可以通过gdb attach上去后，执行gcore来生成core；然后再dlv core来调试。