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https://github.com/golang/go
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49 lines
873 B
Go
49 lines
873 B
Go
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// run
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// Copyright 2014 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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// Test that s[len(s):] - which can point past the end of the allocated block -
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// does not confuse the garbage collector.
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package main
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import (
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"runtime"
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"time"
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)
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type T struct {
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ptr **int
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pad [120]byte
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}
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var things []interface{}
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func main() {
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setup()
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runtime.GC()
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runtime.GC()
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time.Sleep(10*time.Millisecond)
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runtime.GC()
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runtime.GC()
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time.Sleep(10*time.Millisecond)
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}
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func setup() {
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var Ts []interface{}
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buf := make([]byte, 128)
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for i := 0; i < 10000; i++ {
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s := string(buf)
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t := &T{ptr: new(*int)}
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runtime.SetFinalizer(t.ptr, func(**int) { panic("*int freed too early") })
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Ts = append(Ts, t)
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things = append(things, s[len(s):])
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}
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things = append(things, Ts...)
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}
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