mirror of
https://github.com/golang/go
synced 2024-11-22 05:24:39 -07:00
c6138efbcb
Enable package tests for Native Client build. R=r CC=golang-dev https://golang.org/cl/957042
28 lines
792 B
Go
28 lines
792 B
Go
// [ $GOOS != nacl ] || exit 0 # do not bother on NaCl
|
|
// $G $D/$F.go && $L $F.$A &&
|
|
// ((! sh -c ./$A.out) >/dev/null 2>&1 || echo BUG: should fail)
|
|
|
|
// Copyright 2009 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.
|
|
|
|
package main
|
|
|
|
import "unsafe"
|
|
|
|
var x byte
|
|
|
|
func main() {
|
|
var p *[1<<30]byte = nil;
|
|
x = 123;
|
|
|
|
// The problem here is not the use of unsafe:
|
|
// it is that indexing into p[] with a large
|
|
// enough index jumps out of the unmapped section
|
|
// at the beginning of memory and into valid memory.
|
|
// Pointer offsets and array indices, if they are
|
|
// very large, need to dereference the base pointer
|
|
// to trigger a trap.
|
|
println(p[uintptr(unsafe.Pointer(&x))]); // should crash
|
|
}
|