/usr/share/go-1.8/test/escape_slice.go is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | // errorcheck -0 -m -l
// Copyright 2015 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.
// Test escape analysis for slices.
package escape
import (
"os"
"strings"
)
var sink interface{}
func slice0() {
var s []*int
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
_ = s
}
func slice1() *int {
var s []*int
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
return s[0]
}
func slice2() []*int {
var s []*int
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
return s
}
func slice3() *int {
var s []*int
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
for _, p := range s {
return p
}
return nil
}
func slice4(s []*int) { // ERROR "s does not escape"
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
}
func slice5(s []*int) { // ERROR "s does not escape"
if s != nil {
s = make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
}
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
}
func slice6() {
s := make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
_ = s
}
func slice7() *int {
s := make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
return s[0]
}
func slice8() {
i := 0
s := []*int{&i} // ERROR "&i does not escape" "literal does not escape"
_ = s
}
func slice9() *int {
i := 0 // ERROR "moved to heap: i"
s := []*int{&i} // ERROR "&i escapes to heap" "literal does not escape"
return s[0]
}
func slice10() []*int {
i := 0 // ERROR "moved to heap: i"
s := []*int{&i} // ERROR "&i escapes to heap" "literal escapes to heap"
return s
}
func envForDir(dir string) []string { // ERROR "dir does not escape"
env := os.Environ()
return mergeEnvLists([]string{"PWD=" + dir}, env) // ERROR ".PWD=. \+ dir escapes to heap" "\[\]string literal does not escape"
}
func mergeEnvLists(in, out []string) []string { // ERROR "leaking param content: in" "leaking param content: out" "leaking param: out to result ~r2 level=0"
NextVar:
for _, inkv := range in {
k := strings.SplitAfterN(inkv, "=", 2)[0]
for i, outkv := range out {
if strings.HasPrefix(outkv, k) {
out[i] = inkv
continue NextVar
}
}
out = append(out, inkv)
}
return out
}
const (
IPv4len = 4
IPv6len = 16
)
var v4InV6Prefix = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff}
func IPv4(a, b, c, d byte) IP {
p := make(IP, IPv6len) // ERROR "make\(IP, IPv6len\) escapes to heap"
copy(p, v4InV6Prefix)
p[12] = a
p[13] = b
p[14] = c
p[15] = d
return p
}
type IP []byte
type IPAddr struct {
IP IP
Zone string // IPv6 scoped addressing zone
}
type resolveIPAddrTest struct {
network string
litAddrOrName string
addr *IPAddr
err error
}
var resolveIPAddrTests = []resolveIPAddrTest{
{"ip", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
{"ip4", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
{"ip4:icmp", "127.0.0.1", &IPAddr{IP: IPv4(127, 0, 0, 1)}, nil},
}
func setupTestData() {
resolveIPAddrTests = append(resolveIPAddrTests,
[]resolveIPAddrTest{ // ERROR "\[\]resolveIPAddrTest literal does not escape"
{"ip",
"localhost",
&IPAddr{IP: IPv4(127, 0, 0, 1)}, // ERROR "&IPAddr literal escapes to heap"
nil},
{"ip4",
"localhost",
&IPAddr{IP: IPv4(127, 0, 0, 1)}, // ERROR "&IPAddr literal escapes to heap"
nil},
}...)
}
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