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-rw-r--r--test/fixedbugs/issue15002.go132
1 files changed, 132 insertions, 0 deletions
diff --git a/test/fixedbugs/issue15002.go b/test/fixedbugs/issue15002.go
new file mode 100644
index 0000000..936105e
--- /dev/null
+++ b/test/fixedbugs/issue15002.go
@@ -0,0 +1,132 @@
+// run
+// +build amd64
+// +build linux darwin
+
+// Copyright 2016 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 (
+ "fmt"
+ "syscall"
+)
+
+// Use global variables so the compiler
+// doesn't know that they are constants.
+var p = syscall.Getpagesize()
+var zero = 0
+var one = 1
+
+func main() {
+ // Allocate 2 pages of memory.
+ b, err := syscall.Mmap(-1, 0, 2*p, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE)
+ if err != nil {
+ panic(err)
+ }
+ // Mark the second page as faulting.
+ err = syscall.Mprotect(b[p:], syscall.PROT_NONE)
+ if err != nil {
+ panic(err)
+ }
+ // Get a slice pointing to the last byte of the good page.
+ x := b[p-one : p]
+
+ test16(x)
+ test16i(x, 0)
+ test32(x)
+ test32i(x, 0)
+ test64(x)
+ test64i(x, 0)
+}
+
+func test16(x []byte) uint16 {
+ defer func() {
+ r := recover()
+ if r == nil {
+ panic("no fault or bounds check failure happened")
+ }
+ s := fmt.Sprintf("%s", r)
+ if s != "runtime error: index out of range [1] with length 1" {
+ panic("bad panic: " + s)
+ }
+ }()
+ // Try to read 2 bytes from x.
+ return uint16(x[0]) | uint16(x[1])<<8
+
+ // We expect to get an "index out of range" error from x[1].
+ // If we promote the first load to a 2-byte load, it will segfault, which we don't want.
+}
+
+func test16i(x []byte, i int) uint16 {
+ defer func() {
+ r := recover()
+ if r == nil {
+ panic("no fault or bounds check failure happened")
+ }
+ s := fmt.Sprintf("%s", r)
+ if s != "runtime error: index out of range [1] with length 1" {
+ panic("bad panic: " + s)
+ }
+ }()
+ return uint16(x[i]) | uint16(x[i+1])<<8
+}
+
+func test32(x []byte) uint32 {
+ defer func() {
+ r := recover()
+ if r == nil {
+ panic("no fault or bounds check failure happened")
+ }
+ s := fmt.Sprintf("%s", r)
+ if s != "runtime error: index out of range [1] with length 1" {
+ panic("bad panic: " + s)
+ }
+ }()
+ return uint32(x[0]) | uint32(x[1])<<8 | uint32(x[2])<<16 | uint32(x[3])<<24
+}
+
+func test32i(x []byte, i int) uint32 {
+ defer func() {
+ r := recover()
+ if r == nil {
+ panic("no fault or bounds check failure happened")
+ }
+ s := fmt.Sprintf("%s", r)
+ if s != "runtime error: index out of range [1] with length 1" {
+ panic("bad panic: " + s)
+ }
+ }()
+ return uint32(x[i]) | uint32(x[i+1])<<8 | uint32(x[i+2])<<16 | uint32(x[i+3])<<24
+}
+
+func test64(x []byte) uint64 {
+ defer func() {
+ r := recover()
+ if r == nil {
+ panic("no fault or bounds check failure happened")
+ }
+ s := fmt.Sprintf("%s", r)
+ if s != "runtime error: index out of range [1] with length 1" {
+ panic("bad panic: " + s)
+ }
+ }()
+ return uint64(x[0]) | uint64(x[1])<<8 | uint64(x[2])<<16 | uint64(x[3])<<24 |
+ uint64(x[4])<<32 | uint64(x[5])<<40 | uint64(x[6])<<48 | uint64(x[7])<<56
+}
+
+func test64i(x []byte, i int) uint64 {
+ defer func() {
+ r := recover()
+ if r == nil {
+ panic("no fault or bounds check failure happened")
+ }
+ s := fmt.Sprintf("%s", r)
+ if s != "runtime error: index out of range [1] with length 1" {
+ panic("bad panic: " + s)
+ }
+ }()
+ return uint64(x[i+0]) | uint64(x[i+1])<<8 | uint64(x[i+2])<<16 | uint64(x[i+3])<<24 |
+ uint64(x[i+4])<<32 | uint64(x[i+5])<<40 | uint64(x[i+6])<<48 | uint64(x[i+7])<<56
+}