GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/mateusz.gajewski/Desktop/Projects/"
GORACE=""
GOROOT="/usr/local/Cellar/go/HEAD-2b445c7/libexec"
GOTOOLDIR="/usr/local/Cellar/go/HEAD-2b445c7/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/43/1y0rrqr55zq3f8cj5wpkt1kmhc7r33/T/go-build808603188=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"

package main

type TypeA func(int) StructA

type StructA struct {
	Message string
}

func FuncA() StructA {
	return StructA{"Hello!"}
}

var VarA int32 = 32
var VarB StructA = StructA{"Hello!"}

const ConstA int32 = 64

package main

import (
	"fmt"
	"plugin"
	"reflect"
	"unsafe"
)

type Plug struct {
	Path    string
	_       chan struct{}
	Symbols map[string]interface{}
}

func main() {
	p, err := plugin.Open("plugin.so")
	if err != nil {
		panic(err)
	}

	inspectPlugin(p)
}

func inspectPlugin(p *plugin.Plugin) {
	pl := (*Plug)(unsafe.Pointer(p))

	fmt.Printf("Plugin %s exported symbols (%d): \n", pl.Path, len(pl.Symbols))

	for name, pointers := range pl.Symbols {
		fmt.Printf("symbol: %s, pointer: %v, type: %v\n", name, pointers, reflect.TypeOf(pointers))
	}
}

Plugin command-line-arguments exported symbols (3):
symbol: FuncA, pointer: 0x5841800, type: func() main.StructA
symbol: VarA, pointer: 0x58813e4, type: *int32
symbol: VarB, pointer: &{Hello!}, type: *main.StructA