// run
// 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.
package main
import (
"strings"
"unsafe"
)
func main() {
n := -1
testInts(uint64(n))
testBytes(uint64(n))
var t *byte
if unsafe.Sizeof(t) == 8 {
// Test mem > maxAlloc
testInts(1 << 59)
// Test elem.size*cap overflow
testInts(1<<63 - 1)
testInts(1<<64 - 1)
testBytes(1<<64 - 1)
} else {
testInts(1<<31 - 1)
// Test elem.size*cap overflow
testInts(1<<32 - 1)
testBytes(1<<32 - 1)
}
}
func shouldPanic(str string, f func()) {
defer func() {
err := recover()
if err == nil {
panic("did not panic")
}
s := err.(error).Error()
if !strings.Contains(s, str) {
panic("got panic " + s + ", want " + str)
}
}()
f()
}
func testInts(n uint64) {
testMakeInts(n)
testMakeCopyInts(n)
testMakeInAppendInts(n)
}
func testBytes(n uint64) {
testMakeBytes(n)
testMakeCopyBytes(n)
testMakeInAppendBytes(n)
}
// Test make panics for given length or capacity n.
func testMakeInts(n uint64) {
type T []int
shouldPanic("len out of range", func() { _ = make(T, int(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, int(n)) })
shouldPanic("len out of range", func() { _ = make(T, uint(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, uint(n)) })
shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
shouldPanic("len out of range", func() { _ = make(T, uint64(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, uint64(n)) })
}
func testMakeBytes(n uint64) {
type T []byte
shouldPanic("len out of range", func() { _ = make(T, int(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, int(n)) })
shouldPanic("len out of range", func() { _ = make(T, uint(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, uint(n)) })
shouldPanic("len out of range", func() { _ = make(T, int64(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, int64(n)) })
shouldPanic("len out of range", func() { _ = make(T, uint64(n)) })
shouldPanic("cap out of range", func() { _ = make(T, 0, uint64(n)) })
}
// Test make+copy panics since the gc compiler optimizes these
// to runtime.makeslicecopy calls.
func testMakeCopyInts(n uint64) {
type T []int
var c = make(T, 8)
shouldPanic("len out of range", func() { x := make(T, int(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, int(n)); copy(x, c) })
shouldPanic("len out of range", func() { x := make(T, uint(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, uint(n)); copy(x, c) })
shouldPanic("len out of range", func() { x := make(T, int64(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, int64(n)); copy(x, c) })
shouldPanic("len out of range", func() { x := make(T, uint64(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, uint64(n)); copy(x, c) })
}
func testMakeCopyBytes(n uint64) {
type T []byte
var c = make(T, 8)
shouldPanic("len out of range", func() { x := make(T, int(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, int(n)); copy(x, c) })
shouldPanic("len out of range", func() { x := make(T, uint(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, uint(n)); copy(x, c) })
shouldPanic("len out of range", func() { x := make(T, int64(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, int64(n)); copy(x, c) })
shouldPanic("len out of range", func() { x := make(T, uint64(n)); copy(x, c) })
shouldPanic("cap out of range", func() { x := make(T, 0, uint64(n)); copy(x, c) })
}
// Test make in append panics for int slices since the gc compiler optimizes makes in appends.
func testMakeInAppendInts(n uint64) {
type T []int
for _, length := range []int{0, 1} {
t := make(T, length)
shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, int64(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int64(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, uint64(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint64(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, uint(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint(n))...) })
}
}
func testMakeInAppendBytes(n uint64) {
type T []byte
for _, length := range []int{0, 1} {
t := make(T, length)
shouldPanic("len out of range", func() { _ = append(t, make(T, int(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, uint(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, int64(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, int64(n))...) })
shouldPanic("len out of range", func() { _ = append(t, make(T, uint64(n))...) })
shouldPanic("cap out of range", func() { _ = append(t, make(T, 0, uint64(n))...) })
}
}
Mini Shell