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https://github.com/golang/go
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49 lines
763 B
Go
49 lines
763 B
Go
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// run
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "runtime"
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type T [4]int
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//go:noinline
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func g(x []*T) ([]*T, []*T) { return x, x }
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func main() {
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const Jenny = 8675309
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s := [10]*T{{Jenny}}
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done := make(chan struct{})
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runtime.SetFinalizer(s[0], func(p *T) { close(done) })
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var h, _ interface{} = g(s[:])
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if wait(done) {
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panic("GC'd early")
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}
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if h.([]*T)[0][0] != Jenny {
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panic("lost Jenny's number")
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}
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if !wait(done) {
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panic("never GC'd")
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}
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}
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func wait(done <-chan struct{}) bool {
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for i := 0; i < 10; i++ {
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runtime.GC()
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select {
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case <-done:
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return true
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default:
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}
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}
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return false
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}
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