Initial commit: Go 1.23 release state

test/fixedbugs/issue15002.go

@@ -0,0 +1,132 @@
+// run
+
+//go:build amd64 && (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
+}