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https://github.com/golang/go
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34 lines
602 B
Go
34 lines
602 B
Go
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// +build amd64p32
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// run
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// Copyright 2018 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 (
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"bytes"
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"fmt"
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"unsafe"
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)
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func main() {
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b := make([]byte, 128)
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for i := range b {
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b[i] = 1
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}
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if bytes.IndexByte(b, 0) != -1 {
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panic("found 0")
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}
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for i := range b {
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b[i] = 0
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c := b
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*(*int)(unsafe.Pointer(uintptr(unsafe.Pointer(&c)) + unsafe.Sizeof(uintptr(0)))) = 1<<31 - 1
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if bytes.IndexByte(c, 0) != i {
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panic(fmt.Sprintf("missing 0 at %d\n", i))
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}
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b[i] = 1
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}
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}
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