| 1 | //go:build ignore |
|---|---|
| 2 | // +build ignore |
| 3 | |
| 4 | package main |
| 5 | |
| 6 | import "unsafe" |
| 7 | |
| 8 | var a int |
| 9 | |
| 10 | func conv1() { |
| 11 | // Conversions of channel direction. |
| 12 | ch := make(chan int) // @line c1make |
| 13 | print((<-chan int)(ch)) // @pointsto makechan@c1make:12 |
| 14 | print((chan<- int)(ch)) // @pointsto makechan@c1make:12 |
| 15 | } |
| 16 | |
| 17 | func conv2() { |
| 18 | // string -> []byte/[]rune conversion |
| 19 | s := "foo" |
| 20 | ba := []byte(s) // @line c2ba |
| 21 | ra := []rune(s) // @line c2ra |
| 22 | print(ba) // @pointsto convert@c2ba:14 |
| 23 | print(ra) // @pointsto convert@c2ra:14 |
| 24 | } |
| 25 | |
| 26 | func conv3() { |
| 27 | // Conversion of same underlying types. |
| 28 | type PI *int |
| 29 | pi := PI(&a) |
| 30 | print(pi) // @pointsto command-line-arguments.a |
| 31 | |
| 32 | pint := (*int)(pi) |
| 33 | print(pint) // @pointsto command-line-arguments.a |
| 34 | |
| 35 | // Conversions between pointers to identical base types. |
| 36 | var y *PI = &pi |
| 37 | var x **int = (**int)(y) |
| 38 | print(*x) // @pointsto command-line-arguments.a |
| 39 | print(*y) // @pointsto command-line-arguments.a |
| 40 | y = (*PI)(x) |
| 41 | print(*y) // @pointsto command-line-arguments.a |
| 42 | } |
| 43 | |
| 44 | func conv4() { |
| 45 | // Handling of unsafe.Pointer conversion is unsound: |
| 46 | // we lose the alias to command-line-arguments.a and get something like new(int) instead. |
| 47 | p := (*int)(unsafe.Pointer(&a)) // @line c2p |
| 48 | print(p) // @pointsto convert@c2p:13 |
| 49 | } |
| 50 | |
| 51 | // Regression test for b/8231. |
| 52 | func conv5() { |
| 53 | type P unsafe.Pointer |
| 54 | var i *struct{} |
| 55 | _ = P(i) |
| 56 | } |
| 57 | |
| 58 | func main() { |
| 59 | conv1() |
| 60 | conv2() |
| 61 | conv3() |
| 62 | conv4() |
| 63 | conv5() |
| 64 | } |
| 65 |
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