mirror of
https://github.com/golang/go
synced 2024-11-24 12:00:14 -07:00
43 lines
879 B
Go
43 lines
879 B
Go
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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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// Verify that we don't consider a Go'd function's
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// arguments as pointers when they aren't.
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package main
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import (
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"unsafe"
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)
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var badPtr uintptr
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var sink []byte
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func init() {
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// Allocate large enough to use largeAlloc.
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b := make([]byte, 1<<16-1)
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sink = b // force heap allocation
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// Any space between the object and the end of page is invalid to point to.
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badPtr = uintptr(unsafe.Pointer(&b[len(b)-1])) + 1
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}
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var throttle = make(chan struct{}, 10)
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func noPointerArgs(a, b, c, d uintptr) {
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sink = make([]byte, 4096)
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<-throttle
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}
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func main() {
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const N = 1000
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for i := 0; i < N; i++ {
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throttle <- struct{}{}
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go noPointerArgs(badPtr, badPtr, badPtr, badPtr)
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sink = make([]byte, 4096)
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}
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}
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