build constraints exclude all Go files in ...

[uberswe]

Hello, I am currently working on updating my benchmarking repository which compares goloader to several other "plugin" implementations using Go. I am trying to use docker to standardise my benchmarks and improve my testing as I update to 1.21. However, I am having issues getting goloader running in my latest branch seen here: https://github.com/uberswe/go-plugin-benchmark/tree/docker%2Bautomation

What I do is I run the following commands:

cp -r /usr/local/go/src/cmd/internal /usr/local/go/src/cmd/objfile
go list -export -f '{{if .Export}}packagefile {{.ImportPath}}={{.Export}}{{end}}' std `go list -f {{.Imports}} ./goloader/main.go | awk '{sub(/^\[/, ""); print }' | awk '{sub(/\]$/, ""); print }'` > importcfg
go tool compile -importcfg importcfg -o ./goloader.o ./goloader/main.go

My goloader/main.go file looks like this:

package main

import (
    "math/rand"
)

// RandInt uses math/rand to return a random integer
func RandInt() int {
    return rand.Int()
}

And then when I run my benchmark I get the following error:

go: downloading github.com/pkujhd/goloader v0.0.0-20220509034319-898ebfc025e3
# github.com/uberswe/go-plugin-benchmark
package github.com/uberswe/go-plugin-benchmark (test)
        imports github.com/pkujhd/goloader
        imports github.com/pkujhd/goloader/objabi/dataindex: build constraints exclude all Go files in /go/pkg/mod/github.com/pkujhd/goloader@v0.0.0-20220509034319-898ebfc025e3/objabi/dataindex
FAIL    github.com/uberswe/go-plugin-benchmark [setup failed]

This is the relevant benchmarking code

func BenchmarkGoloaderRandInt(b *testing.B) {
    linker, err := goloader.ReadObjs([]string{"goloader.o"}, []string{"importcfg"})
    if err != nil {
        b.Error(err)
        return
    }

    run := "main.RandInt"

    symPtr := make(map[string]uintptr)
    err = goloader.RegSymbol(symPtr)
    if err != nil {
        b.Error(err)
        return
    }

    codeModule, err := goloader.Load(linker, symPtr)
    if err != nil {
        fmt.Println("Load error:", err)
        return
    }
    runFuncPtr := codeModule.Syms[run]
    if runFuncPtr == 0 {
        fmt.Println("Load error! not find function:", run)
        return
    }
    funcPtrContainer := (uintptr)(unsafe.Pointer(&runFuncPtr))
    runFunc := *(*func() int)(unsafe.Pointer(&funcPtrContainer))

    b.Run("goloader", func(b *testing.B) {
        for i := 0; i < b.N; i++ {
            _ = runFunc()
        }
    })

    os.Stdout.Sync()
    codeModule.Unload()
}

Any ideas on what I might be doing wrong?

[pkujhd]

you download goloader version is 20220509, you need current master version which it is support golang 1.21

[uberswe]

Thank you, sometimes the most simple mistakes get overlooked