I am writing a golang plugin where I need to keep getting a byte array from the plug function and passing it to another function provided by the plugin. However, after a couple of iterations I got this error
fatal error: invalid pointer found on stack
client.go
package main
import (
"plugin"
"log"
)
type T interface {
GenByte() []byte
PrintByte(data []byte)
}
func main() {
plgin, _ := plugin.Open("./plugin.so")
symbol, _ := plgin.Lookup("Endpoint")
b, _ := symbol.(T)
log.Println("From main")
for{
data := b.GenByte()
b.PrintByte(data)
}
}
plugin.go
package main
import (
"log"
)
type dummy struct {}
func (d dummy)GenByte() []byte {
log.Println("From plugin GenByte")
data:=[]byte{1,2,3,4,5}
return data
}
func (d dummy)PrintByte(data []byte) {
log.Println("From plugin PrintByte")
log.Println(data)
}
var Endpoint dummy
func main() {
}
output
2018/07/18 16:47:51 From plugin GenByte
2018/07/18 16:47:51 From plugin PrintByte
2018/07/18 16:47:51 [1 2 3 4 5]
[repeat a number of times]
runtime: bad pointer in frame plugin/unnamed-8b1a52c90a93f94ad1c14cee47dc41ef6a9bc487.dummy.PrintByte at 0xc420055eb0: 0x5
fatal error: invalid pointer found on stack
Update: go version go1.10.3 darwin/amd64
go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/yishengyang/Library/Caches/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/yishengyang//go"
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/vh/6m51srdn3ps28tc64qy1343h0000gp/T/go-build637303097=/tmp/go-build -gno-record-gcc-switches -fno-common"