glob.func in pprof heap profiles

Question

When doing a heap profile using go tool pprof, I see some entries like github.com/anacrolix/utp.glob.func1. This doesn't correspond to any named function I can see, I assume it's a closure. What does glob refer to? How can I associate names like this to the appropriate function?

Answer 1

glob refers to global environment, func1 means anonymous function. So it should refer to some global anonymous function. Check this example and its panic information:

Example:

package main

import (
    "fmt"
)

var (
    p = func() string {
        panic("a")

        return "asdf"
    }()
)

func main() {
    fmt.Println(p)
}

Panic information:

panic: a

goroutine 1 [running]:
panic(0x128360, 0x1040a120)
    /usr/local/go/src/runtime/panic.go:464 +0x700
main.glob.func1(0x0, 0x0)
    /tmp/sandbox715198144/main.go:9 +0x80
main.init()
    /tmp/sandbox715198144/main.go:12 +0xa0