1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
// run
// Copyright 2018 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.
// Verify that we don't consider a Go'd function's
// arguments as pointers when they aren't.
package main
import (
"unsafe"
)
var badPtr uintptr
var sink []byte
func init() {
// Allocate large enough to use largeAlloc.
b := make([]byte, 1<<16-1)
sink = b // force heap allocation
// Any space between the object and the end of page is invalid to point to.
badPtr = uintptr(unsafe.Pointer(&b[len(b)-1])) + 1
}
var throttle = make(chan struct{}, 10)
func noPointerArgs(a, b, c, d uintptr) {
sink = make([]byte, 4096)
<-throttle
}
func main() {
const N = 1000
for i := 0; i < N; i++ {
throttle <- struct{}{}
go noPointerArgs(badPtr, badPtr, badPtr, badPtr)
sink = make([]byte, 4096)
}
}
|
