I have the following two files:
// hello.go
package main
import (
"fmt"
)
func Hello() {
fmt.Println("hello")
}
func main() {}
build as plugin: `go build -buildmode=plugin hello.go`
// main.go
package main
import (
"log"
"plugin"
"time"
)
func main() {
for {
log.Println("start load plugin.")
time.Sleep(time.Second)
p, err := plugin.Open("../hello.so")
if err != nil {
log.Println(err)
continue
}
sym, err := p.Lookup("Hello")
if err != nil {
log.Println(err)
continue
}
hello, ok := sym.(func())
if !ok {
log.Println(err)
continue
}
for i := 0; i < 10; i++ {
hello()
time.Sleep(time.Second)
}
}
}
// `go build main.go`
main.go keeps calling the Hello function from hello.so file. I tried to
modify the hello.go file, and re-built the hello.so file. The so file was
successfully replaced. However, the main process was still printing the old
world "hello". It seems the so file in memory was not changed, even the
main program reloaded the so file once for a while.
Restarting the main process could make it work. But it is not what i am
looking for.
How could I dynamically update the so file and make it applied in main
process?
Thanks.
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