diff options
Diffstat (limited to 'src/pkg/bytes/equal_test.go')
-rw-r--r-- | src/pkg/bytes/equal_test.go | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/src/pkg/bytes/equal_test.go b/src/pkg/bytes/equal_test.go deleted file mode 100644 index 1bf19a74b..000000000 --- a/src/pkg/bytes/equal_test.go +++ /dev/null @@ -1,47 +0,0 @@ -// Copyright 2013 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. -// -// +build linux - -package bytes_test - -import ( - . "bytes" - "syscall" - "testing" - "unsafe" -) - -// This file tests the situation where memeq is checking -// data very near to a page boundary. We want to make sure -// equal does not read across the boundary and cause a page -// fault where it shouldn't. - -// This test runs only on linux. The code being tested is -// not OS-specific, so it does not need to be tested on all -// operating systems. - -func TestEqualNearPageBoundary(t *testing.T) { - pagesize := syscall.Getpagesize() - b := make([]byte, 4*pagesize) - i := pagesize - for ; uintptr(unsafe.Pointer(&b[i]))%uintptr(pagesize) != 0; i++ { - } - syscall.Mprotect(b[i-pagesize:i], 0) - syscall.Mprotect(b[i+pagesize:i+2*pagesize], 0) - defer syscall.Mprotect(b[i-pagesize:i], syscall.PROT_READ|syscall.PROT_WRITE) - defer syscall.Mprotect(b[i+pagesize:i+2*pagesize], syscall.PROT_READ|syscall.PROT_WRITE) - - // both of these should fault - //pagesize += int(b[i-1]) - //pagesize += int(b[i+pagesize]) - - for j := 0; j < pagesize; j++ { - b[i+j] = 'A' - } - for j := 0; j <= pagesize; j++ { - Equal(b[i:i+j], b[i+pagesize-j:i+pagesize]) - Equal(b[i+pagesize-j:i+pagesize], b[i:i+j]) - } -} |