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go/misc/cgo/testplugin/testdata/issue53989/main.go

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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Issue 53989: the use of jump table caused a function
// from the plugin jumps in the middle of the function
// to the function with the same name in the main
// executable. As these two functions may be compiled
// differently as plugin needs to be PIC, this causes
// crash.
package main
import (
"plugin"
"testplugin/issue53989/p"
)
func main() {
p.Square(7) // call the function in main executable
p, err := plugin.Open("issue53989.so")
if err != nil {
panic(err)
}
f, err := p.Lookup("Square")
if err != nil {
panic(err)
}
f.(func(int))(7) // call the plugin one
}