I need help with Remote debugging in Gogland with Delve.
I try to debug my app on remote server with IDE Goglang (1.0 EAP) and dlv link: https://github.com/derekparker/delve/
Install and try remote debug simple program:
package main
import "fmt"
func main() {
fmt.Println("hello world")
for i:=uint(0); i< 10; i++{
fmt.Println(i)
}
}
Firstly, start dlv on remote host (output from console):
$ dlv debug --headless --listen=:2345 --log --api-version=2
API server listening at: [::]:2345
Then, start remote debug in IDE:
Out from remote host console:
2017/07/20 17:23:24 debugger.go:504: continuing
2017/07/20 17:23:24 debugger.go:493: halting
2017/07/20 17:23:24 debugger.go:347: created breakpoint: &api.Breakpoint{ID:1, Name:"", Addr:0x47bb52, File:"/....../hello/hello.go", Line:6, FunctionName:"main.main", Cond:"", Tracepoint:false, Goroutine:false, Stacktrace:0, Variables:[]string(nil), LoadArgs:(*api.LoadConfig)(nil), LoadLocals:(*api.LoadConfig)(nil), HitCount:map[string]uint64{}, TotalHitCount:0x0}
2017/07/20 17:23:24 debugger.go:504: continuing
2017/07/20 17:23:28 debugger.go:516: nexting
hello world
2017/07/20 17:23:28 debugger.go:516: nexting
2017/07/20 17:23:29 debugger.go:516: nexting
0
2017/07/20 17:23:29 debugger.go:516: nexting
02017/07/20 17:23:29 debugger.go:516: nexting
2017/07/20 17:23:29 debugger.go:516: nexting
1
2017/07/20 17:23:29 debugger.go:516: nexting
12017/07/20 17:23:30 debugger.go:516: nexting
2017/07/20 17:23:30 debugger.go:516: nexting
2
2017/07/20 17:23:30 debugger.go:516: nexting
42017/07/20 17:23:30 debugger.go:516: nexting
2017/07/20 17:23:30 debugger.go:516: nexting
3
2017/07/20 17:23:30 debugger.go:516: nexting
92017/07/20 17:23:31 debugger.go:516: nexting
2017/07/20 17:23:31 debugger.go:516: nexting
4
2017/07/20 17:23:31 debugger.go:516: nexting
162017/07/20 17:23:31 debugger.go:516: nexting
2017/07/20 17:23:31 debugger.go:516: nexting
5
2017/07/20 17:23:32 debugger.go:516: nexting
252017/07/20 17:23:32 debugger.go:516: nexting
2017/07/20 17:23:32 debugger.go:516: nexting
6
2017/07/20 17:23:32 debugger.go:516: nexting
362017/07/20 17:23:32 debugger.go:516: nexting
2017/07/20 17:23:32 debugger.go:516: nexting
7
2017/07/20 17:23:33 debugger.go:516: nexting
492017/07/20 17:23:33 debugger.go:516: nexting
2017/07/20 17:23:33 debugger.go:516: nexting
8
2017/07/20 17:23:34 debugger.go:516: nexting
642017/07/20 17:23:34 debugger.go:516: nexting
2017/07/20 17:23:34 debugger.go:516: nexting
9
2017/07/20 17:23:34 debugger.go:516: nexting
812017/07/20 17:23:34 debugger.go:516: nexting
2017/07/20 17:23:35 debugger.go:516: nexting
2017/07/20 17:23:35 debugger.go:516: nexting
Everything works as I expected (breakpoint, F7, F8 and etc.)
Then i try to debug My APP:
dlv debug --headless --listen=:2345 --log --api-version=2 -- --v --console
2017/07/20 17:26:51 debugger.go:97: launching process with args: [/home/...../debug --v --console]
API server listening at: [::]:2345
IDE start
Output:
2017/07/20 17:26:55 debugger.go:493: halting
2017/07/20 17:26:55 debugger.go:347: created breakpoint: &api.Breakpoint{ID:1, Name:"", Addr:0x687a73, File:"/home/..........go", Line:136, FunctionName:"main.main", Cond:"", Tracepoint:false, Goroutine:false, Stacktrace:0, Variables:[]string(nil), LoadArgs:(*api.LoadConfig)(nil), LoadLocals:(*api.LoadConfig)(nil), HitCount:map[string]uint64{}, TotalHitCount:0x0}
2017/07/20 17:26:55 debugger.go:347: created breakpoint: &api.Breakpoint{ID:2, Name:"", Addr:0x6869b2, File:"/home/..........go", Line:66, FunctionName:"main.main", Cond:"", Tracepoint:false, Goroutine:false, Stacktrace:0, Variables:[]string(nil), LoadArgs:(*api.LoadConfig)(nil), LoadLocals:(*api.LoadConfig)(nil), HitCount:map[string]uint64{}, TotalHitCount:0x0}
2017/07/20 17:26:55 debugger.go:504: continuing
2017/07/20 17:26:55 debugger.go:347: created breakpoint: &api.Breakpoint{ID:3, Name:"", Addr:0x687d33, File:"/home/........go", Line:143, FunctionName:"main.main", Cond:"", Tracepoint:false, Goroutine:false, Stacktrace:0, Variables:[]string(nil), LoadArgs:(*api.LoadConfig)(nil), LoadLocals:(*api.LoadConfig)(nil), HitCount:map[string]uint64{}, TotalHitCount:0x0}
2017/07/20 17:26:55 debugger.go:504: continuing
2017/07/20 17:26:57 debugger.go:516: nexting
IDE debug does not work (hangs up). If I don't use breakpoints app start and run like a usual (RUN).
I think this line is the reason for my problem:
2017/07/20 17:26:45 debugger.go:493: halting
Why does it arise ?? Maybe I have a complicated utility structure (the main package is divided into several files, of course there are external plug-in packages, etc.) or something else?
BUT (! the most interesting !) is that if you join a remote server not through the IDE, but through the console, then debugging works on a simple example and in the case of my utility:
dlv connect HOSTNAME:2345
Type 'help' for list of commands.
(dlv) b ********.go:137
Breakpoint 1 set at 0x687a86 for main.main() /home/*************.go:137
(dlv) c
> main.main() /home/***************************.go:137 (hits goroutine(1):1 total:1) (PC: 0x687a86)
(dlv) n
Output:
$ dlv debug --headless --listen=:2345 --log --api-version=2 -- --v --console
2017/07/20 17:37:37 debugger.go:97: launching process with args: [/home/*****************/debug --v --console]
API server listening at: [::]:2345
2017/07/20 17:38:27 debugger.go:347: created breakpoint: &api.Breakpoint{ID:1, Name:"", Addr:0x687a86, File:"/home/*******************.go", Line:137, FunctionName:"main.main", Cond:"", Tracepoint:false, Goroutine:false, Stacktrace:0, Variables:[]string(nil), LoadArgs:(*api.LoadConfig)(nil), LoadLocals:(*api.LoadConfig)(nil), HitCount:map[string]uint64{}, TotalHitCount:0x0}
2017/07/20 17:38:35 debugger.go:504: continuing
2017/07/20 17:38:39 debugger.go:516: nexting
Those. There is a suspicion of an error in the IDE, or I'm doing something wrong :).
I also try debug with dlv exec (already build app) and other command.
Thanks for the time given to the question, I really hope for help.
P.S. I will also be glad to know what else you can use for remote debugging for GO app.
P.P.S. I tried to make remote debugging in Atom.io and in VS code In Atom, work only locale debug with dlv.
In VS code the local debugger works through dlv + remote debugger works, but breakpoints doesn't work !!! Those. VS Code is also not an option. Configuring VS Code (launch.json)
{
"version": "0.2.0",
"configurations": [
{
"name": "REMOTE",
"type": "go",
"request": "launch",
"mode": "remote",
"remotePath": "{workspaceRoot}",
"port": 2345,
"host": "REMOTE_HOST_NAME",
"program": "${workspaceRoot}", //"${fileDirname}",
"env": {},
"args": ["--v", "--console"],
"showLog": true
}
]
}
