golang调试工具delve
之前一直在烦心不知道怎么打印所有goroutine的stack，最近终于发现一个该工具。
- 什么是delve
delve是golang推荐的专门go语言调试工具，用来替代gdb，因为：golang组织说delve能更好的理解go语言。
- delve的安装
delve的项目里面说的很详细，不列出了。
本人使用的是Linux，偷懒直接下载binary包就可以了。
$ go get -u github.com/derekparker/delve/cmd/dlv
在$GOPATH/bin目录下会包含dlv可执行程序。可以直接运行dlv启动delve。
$ dlv
Delve is a source level debugger for Go programs.
Delve enables you to interact with your program by controlling the execution of the process,
evaluating variables, and providing information of thread / goroutine state, CPU register state and more.
The goal of this tool is to provide a simple yet powerful interface for debugging Go programs.
Pass flags to the program you are debugging using `--`, for example:
`dlv exec ./hello -- server --config conf/config.toml`
Usage:
dlv [command]
...
参数很多，很复杂，自己根据需要按需采用就行。
- delve常用命令行
- attach到进程PID
$ dlv attach <pid>
Type 'help' for list of commands.
(dlv) help
- 打印所有的goroutines列表
(dlv) goroutines
[10 goroutines]
Goroutine 1 - User: /usr/local/go/src/syscall/asm_linux_amd64.s:27 syscall.Syscall (0x466e70) (thread 14023)
Goroutine 2 - User: /usr/local/go/src/runtime/proc.go:292 runtime.gopark (0x42800a)
Goroutine 3 - User: /usr/local/go/src/runtime/proc.go:292 runtime.gopark (0x42800a)
Goroutine 17 - User: /usr/local/go/src/runtime/proc.go:292 runtime.gopark (0x42800a)
Goroutine 18 - User: /usr/local/go/src/runtime/sigqueue.go:139 os/signal.signal_recv (0x43b5b6)
Goroutine 19 - User: /usr/local/go/src/runtime/proc.go:292 runtime.gopark (0x42800a)
Goroutine 20 - User: ./main.go:43 main.setupSignalHandler.func1 (0x49318c)
Goroutine 21 - User: /usr/local/go/src/runtime/time.go:102 time.Sleep (0x442ac6)
Goroutine 22 - User: /usr/local/go/src/runtime/time.go:102 time.Sleep (0x442ac6)
Goroutine 23 - User: /usr/local/go/src/runtime/lock_futex.go:227 runtime.notetsleepg (0x40c9a2)
- 打印单个goroutine的stack
(dlv) goroutine <goroutine_id> stack
0 0x0000000000466e70 in syscall.Syscall
at /usr/local/go/src/syscall/asm_linux_amd64.s:27
1 0x000000000046692f in syscall.read
at /usr/local/go/src/syscall/zsyscall_linux_amd64.go:749
2 0x0000000000466449 in syscall.Read
at /usr/local/go/src/syscall/syscall_unix.go:162
3 0x0000000000468798 in internal/poll.(*FD).Read
at /usr/local/go/src/internal/poll/fd_unix.go:153
4 0x0000000000469b8e in os.(*File).read
at /usr/local/go/src/os/file_unix.go:226
5 0x0000000000468f7a in os.(*File).Read
at /usr/local/go/src/os/file.go:107
6 0x00000000004658a6 in io.ReadAtLeast
at /usr/local/go/src/io/io.go:309
7 0x0000000000465a18 in io.ReadFull
at /usr/local/go/src/io/io.go:327
...
- 打印所有goroutine的stack
(dlv) goroutines -t
[10 goroutines]
Goroutine 1 - User: /usr/local/go/src/syscall/asm_linux_amd64.s:27 syscall.Syscall (0x466e70) (thread 14023)
0 0x0000000000466e70 in syscall.Syscall
at /usr/local/go/src/syscall/asm_linux_amd64.s:27
1 0x000000000046692f in syscall.read
at /usr/local/go/src/syscall/zsyscall_linux_amd64.go:749
2 0x0000000000466449 in syscall.Read
at /usr/local/go/src/syscall/syscall_unix.go:162
...
(truncated)
Goroutine 2 - User: /usr/local/go/src/runtime/proc.go:292 runtime.gopark (0x42800a)
0 0x000000000042800a in runtime.gopark
at /usr/local/go/src/runtime/proc.go:292
1 0x00000000004280be in runtime.goparkunlock
at /usr/local/go/src/runtime/proc.go:297
2 0x0000000000427e4c in runtime.forcegchelper
at /usr/local/go/src/runtime/proc.go:248
3 0x0000000000451671 in runtime.goexit
at /usr/local/go/src/runtime/asm_amd64.s:2361
...
- 等等等。。。，不列了，用到的时候再去查文档就行