From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/go.test/test/nilptr/structfield2.go | 37 +++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 gcc/testsuite/go.test/test/nilptr/structfield2.go (limited to 'gcc/testsuite/go.test/test/nilptr/structfield2.go') diff --git a/gcc/testsuite/go.test/test/nilptr/structfield2.go b/gcc/testsuite/go.test/test/nilptr/structfield2.go new file mode 100644 index 000000000..4323b42b4 --- /dev/null +++ b/gcc/testsuite/go.test/test/nilptr/structfield2.go @@ -0,0 +1,37 @@ +// [ $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 dummy [512<<20]byte // give us a big address space +type T struct { + x [256<<20] byte + i int +} + +var y *T +var x = &y + +func main() { + // the test only tests what we intend to test + // if dummy starts in the first 256 MB of memory. + // otherwise there might not be anything mapped + // at the address that might be accidentally + // dereferenced below. + if uintptr(unsafe.Pointer(&dummy)) > 256<<20 { + panic("dummy too far out") + } + + // The problem here is that indexing into t with a large + // enough index can jump out of the unmapped section + // at the beginning of memory and into valid memory. + // We require the pointer dereference to check. + println((*x).i) // should crash +} -- cgit v1.2.3