/usr/share/go-1.8/test/checkbce.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 | // +build amd64
// errorcheck -0 -d=ssa/check_bce/debug=3
package main
func f0(a []int) {
a[0] = 1 // ERROR "Found IsInBounds$"
a[0] = 1
a[6] = 1 // ERROR "Found IsInBounds$"
a[6] = 1
a[5] = 1
a[5] = 1
}
func f1(a [256]int, i int) {
useInt(a[i]) // ERROR "Found IsInBounds$"
useInt(a[i%256]) // ERROR "Found IsInBounds$"
useInt(a[i&255])
useInt(a[i&17])
if 4 <= i && i < len(a) {
useInt(a[i])
useInt(a[i-1]) // ERROR "Found IsInBounds$"
// TODO: 'if 4 <= i && i < len(a)' gets rewritten to 'if uint(i - 4) < 256 - 4',
// which the bounds checker cannot yet use to infer that the next line doesn't need a bounds check.
useInt(a[i-4])
}
}
func f2(a [256]int, i uint) {
useInt(a[i]) // ERROR "Found IsInBounds$"
useInt(a[i%256])
useInt(a[i&255])
useInt(a[i&17])
}
func f3(a [256]int, i uint8) {
useInt(a[i])
useInt(a[i+10])
useInt(a[i+14])
}
func f4(a [27]int, i uint8) {
useInt(a[i%15])
useInt(a[i%19])
useInt(a[i%27])
}
func f5(a []int) {
if len(a) > 5 {
useInt(a[5])
useSlice(a[6:])
useSlice(a[:6]) // ERROR "Found IsSliceInBounds$"
}
}
func f6(a [32]int, b [64]int, i int) {
useInt(a[uint32(i*0x07C4ACDD)>>27])
useInt(b[uint64(i*0x07C4ACDD)>>58])
useInt(a[uint(i*0x07C4ACDD)>>59])
// The following bounds should not be removed because they can overflow.
useInt(a[uint32(i*0x106297f105d0cc86)>>26]) // ERROR "Found IsInBounds$"
useInt(b[uint64(i*0x106297f105d0cc86)>>57]) // ERROR "Found IsInBounds$"
useInt(a[int32(i*0x106297f105d0cc86)>>26]) // ERROR "Found IsInBounds$"
useInt(b[int64(i*0x106297f105d0cc86)>>57]) // ERROR "Found IsInBounds$"
}
func g1(a []int) {
for i := range a {
a[i] = i
useSlice(a[:i+1])
useSlice(a[:i])
}
}
func g2(a []int) {
useInt(a[3]) // ERROR "Found IsInBounds$"
useInt(a[2])
useInt(a[1])
useInt(a[0])
}
func g3(a []int) {
for i := range a[:256] { // ERROR "Found IsSliceInBounds$"
useInt(a[i]) // ERROR "Found IsInBounds$"
}
b := a[:256]
for i := range b {
useInt(b[i])
}
}
func g4(a [100]int) {
for i := 10; i < 50; i++ {
useInt(a[i-10])
useInt(a[i])
useInt(a[i+25])
useInt(a[i+50])
// The following are out of bounds.
useInt(a[i-11]) // ERROR "Found IsInBounds$"
useInt(a[i+51]) // ERROR "Found IsInBounds$"
}
}
//go:noinline
func useInt(a int) {
}
//go:noinline
func useSlice(a []int) {
}
func main() {
}
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