1 // [ $GOOS != nacl ] || exit 0 # do not bother on NaCl
2 // $G $D/$F.go && $L $F.$A &&
3 // ((! sh -c ./$A.out) >/dev/null 2>&1 || echo BUG: should fail)
5 // Copyright 2009 The Go Authors. All rights reserved.
6 // Use of this source code is governed by a BSD-style
7 // license that can be found in the LICENSE file.
13 var dummy
[512<<20]byte // give us a big address space
20 // the test only tests what we intend to test
21 // if dummy starts in the first 256 MB of memory.
22 // otherwise there might not be anything mapped
23 // at the address that might be accidentally
24 // dereferenced below.
25 if uintptr(unsafe
.Pointer(&dummy
)) > 256<<20 {
26 panic("dummy too far out")
29 // The problem here is that indexing into t with a large
30 // enough index can jump out of the unmapped section
31 // at the beginning of memory and into valid memory.
32 // We require the pointer dereference to check.
34 println(t
.i
) // should crash