go x 源码
golang x 代码
文件路径：/src/cmd/link/testdata/testRO/x.go
// Copyright 2020 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.
// Test that read-only data is indeed read-only. This
// program attempts to modify read-only data, and it
// should fail.
package main
import "unsafe"
var s = "hello"
func main() {
println(s)
*(*struct {
p *byte
l int
})(unsafe.Pointer(&s)).p = 'H'
println(s)
}