runtime.epollwait() /usr/local/go/src/runtime/sys_linux_amd64.s:725 (PC: 0x4791a0)

[zhangguanzhang]

Please answer the following before submitting your issue:

Note: Please include any substantial examples (debug session output,
stacktraces, etc) as linked gists.

1. What version of Delve are you using (dlv version)?

windows

$ dlv version
Delve Debugger
Version: 1.6.1
Build: $Id: 114218c22f3791287c4bc2f4ff35a846a1416ee9 $

Linux:

$ dlv version
Delve Debugger
Version: 1.6.1
Build: $Id: 114218c22f3791287c4bc2f4ff35a846a1416ee9 $

2. What version of Go are you using? (go version)?

windows

go version go1.16.5 windows/amd64

Linux

go version go1.16.5 linux/amd64

3. What operating system and processor architecture are you using?

x86_64

4. What did you do?

on the Linux os, GOROOT is /usr/local/go

mkdir temp
cd temp
export GO111MODULE=on
cat > main.go <<EOF
package main

import "github.com/gin-gonic/gin"

func main() {
        var count int
	r := gin.Default()
	r.GET("/ping", func(c *gin.Context) {
                count++
		c.JSON(200, gin.H{
			"message": "pong",
                        "count": count,
		})
	})
	r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080")
}
EOF
go mod init
go mod tidy
go build -gcflags="all=-trimpath=$PWD -N -l" -asmflags "all=-trimpath=$PWD"  -o gin-demo main.go 
./gin-demo
# use the another tty run the dlv
dlv attach $(pgrep gin-demo) --listen=:2345 --headless=true --log=true  \
  --log-output=debugger,debuglineerr,gdbwire,lldbout,rpc --accept-multiclient --api-version=2

on my windows, my GOROOT is D:\Install\Go

$  dlv connect 192.168.2.111:2345
Type 'help' for list of commands.
ls
> runtime.epollwait() /usr/local/go/src/runtime/sys_linux_amd64.s:725 (PC: 0x4791a0)
Warning: debugging optimized function
Command failed: open /usr/local/go/src/runtime/sys_linux_amd64.s: The system cannot find the path specified.

5. What did you expect to see?
6. What did you see instead?

[aarzilli]

You can use the substitute-path configuration option in .dlv/config.yml, or the config substitute-path (see help config) to map remote paths to local paths.

[zhangguanzhang]

config substitute-path /usr/local/go D:\Install\Go

It works, thanks

[zhangguanzhang]

but this does not display the format:

$ dlv connect 192.168.2.111:2345
Type 'help' for list of commands.
config substitute-path /usr/local/go D:\Install\Go
b main.go:10
Command failed: Breakpoint exists at main.go:10 at 892500
c
> main.main.func1() main.go:10 (hits goroutine(19):1 total:2) (PC: 0x892500)
Warning: listing may not match stale executable
     5: func main() {
     6:         var count int
     7:         r := gin.Default()
     8:         r.GET("/ping", func(c *gin.Context) {
     9:                 count++
=>  10:                 c.JSON(200, gin.H{
    11:                         "message": "pong",
    12:                         "count":   count,
    13:                 })
    14:         })
    15:         r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080")
p count
2

@aarzilli
I hope will be this:

$ dlv connect 192.168.2.111:2345
Type 'help' for list of commands.
(dlv) config substitute-path /usr/local/go D:\Install\Go
(dlv) b main.go:10
Command failed: Breakpoint exists at main.go:10 at 892500
(dlv) c
> main.main.func1() main.go:10 (hits goroutine(19):1 total:2) (PC: 0x892500)
Warning: listing may not match stale executable
     5: func main() {
     6:         var count int
     7:         r := gin.Default()
     8:         r.GET("/ping", func(c *gin.Context) {
     9:                 count++
=>  10:                 c.JSON(200, gin.H{
    11:                         "message": "pong",
    12:                         "count":   count,
    13:                 })
    14:         })
    15:         r.Run() // listen and serve on 0.0.0.0:8080 (for windows "localhost:8080")
(dlv) p count
2

[aarzilli]

What format? What's the difference?

[zhangguanzhang]

What format? What's the difference?

I hope this will display the (dlv)

[aarzilli]

I've noticed that happening when running the Windows build of dlv on a mingw terminal. This is a problem between the library we are using for the command prompt and mintty: peterh/liner#96

[zhangguanzhang]

thanks