| 1 | //go:build ignore |
|---|---|
| 2 | // +build ignore |
| 3 | |
| 4 | package main |
| 5 | |
| 6 | func incr(x int) int { return x + 1 } |
| 7 | |
| 8 | func decr(x int) int { return x - 1 } |
| 9 | |
| 10 | var unknown bool // defeat dead-code elimination |
| 11 | |
| 12 | func chan1() { |
| 13 | chA := make(chan func(int) int, 0) // @line c1makeA |
| 14 | chB := make(chan func(int) int, 0) // @line c1makeB |
| 15 | chA <- incr |
| 16 | chB <- decr |
| 17 | chB <- func(int) int { return 1 } |
| 18 | |
| 19 | print(chA) // @pointsto makechan@c1makeA:13 |
| 20 | print(<-chA) // @pointsto command-line-arguments.incr |
| 21 | |
| 22 | print(chB) // @pointsto makechan@c1makeB:13 |
| 23 | print(<-chB) // @pointsto command-line-arguments.decr | command-line-arguments.chan1$1 |
| 24 | } |
| 25 | |
| 26 | func chan2() { |
| 27 | chA := make(chan func(int) int, 0) // @line c2makeA |
| 28 | chB := make(chan func(int) int, 0) // @line c2makeB |
| 29 | chA <- incr |
| 30 | chB <- decr |
| 31 | chB <- func(int) int { return 1 } |
| 32 | |
| 33 | // Channels flow together. |
| 34 | // Labelsets remain distinct but elements are merged. |
| 35 | chAB := chA |
| 36 | if unknown { |
| 37 | chAB = chB |
| 38 | } |
| 39 | |
| 40 | print(chA) // @pointsto makechan@c2makeA:13 |
| 41 | print(<-chA) // @pointsto command-line-arguments.incr |
| 42 | |
| 43 | print(chB) // @pointsto makechan@c2makeB:13 |
| 44 | print(<-chB) // @pointsto command-line-arguments.decr | command-line-arguments.chan2$1 |
| 45 | |
| 46 | print(chAB) // @pointsto makechan@c2makeA:13 | makechan@c2makeB:13 |
| 47 | print(<-chAB) // @pointsto command-line-arguments.incr | command-line-arguments.decr | command-line-arguments.chan2$1 |
| 48 | |
| 49 | (<-chA)(3) |
| 50 | } |
| 51 | |
| 52 | // @calls command-line-arguments.chan2 -> command-line-arguments.incr |
| 53 | |
| 54 | func chan3() { |
| 55 | chA := make(chan func(int) int, 0) // @line c3makeA |
| 56 | chB := make(chan func(int) int, 0) // @line c3makeB |
| 57 | chA <- incr |
| 58 | chB <- decr |
| 59 | chB <- func(int) int { return 1 } |
| 60 | print(chA) // @pointsto makechan@c3makeA:13 |
| 61 | print(<-chA) // @pointsto command-line-arguments.incr |
| 62 | print(chB) // @pointsto makechan@c3makeB:13 |
| 63 | print(<-chB) // @pointsto command-line-arguments.decr | command-line-arguments.chan3$1 |
| 64 | |
| 65 | (<-chA)(3) |
| 66 | } |
| 67 | |
| 68 | // @calls command-line-arguments.chan3 -> command-line-arguments.incr |
| 69 | |
| 70 | func chan4() { |
| 71 | chA := make(chan func(int) int, 0) // @line c4makeA |
| 72 | chB := make(chan func(int) int, 0) // @line c4makeB |
| 73 | |
| 74 | select { |
| 75 | case chA <- incr: |
| 76 | case chB <- decr: |
| 77 | case a := <-chA: |
| 78 | print(a) // @pointsto command-line-arguments.incr |
| 79 | case b := <-chB: |
| 80 | print(b) // @pointsto command-line-arguments.decr |
| 81 | default: |
| 82 | print(chA) // @pointsto makechan@c4makeA:13 |
| 83 | print(chB) // @pointsto makechan@c4makeB:13 |
| 84 | } |
| 85 | |
| 86 | for k := range chA { |
| 87 | print(k) // @pointsto command-line-arguments.incr |
| 88 | } |
| 89 | // Exercise constraint generation (regtest for a crash). |
| 90 | for range chA { |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | // Multi-word channel value in select with multiple receive cases. |
| 95 | // (Regtest for a crash.) |
| 96 | func chan5() { |
| 97 | type T struct { |
| 98 | x *int |
| 99 | y interface{} |
| 100 | } |
| 101 | ch := make(chan T) |
| 102 | ch <- T{new(int), incr} // @line ch5new |
| 103 | select { |
| 104 | case a := <-ch: |
| 105 | print(a.x) // @pointsto new@ch5new:13 |
| 106 | print(a.y) // @types func(x int) int |
| 107 | case b := <-ch: |
| 108 | print(b.x) // @pointsto new@ch5new:13 |
| 109 | print(b.y) // @types func(x int) int |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | func main() { |
| 114 | chan1() |
| 115 | chan2() |
| 116 | chan3() |
| 117 | chan4() |
| 118 | chan5() |
| 119 | } |
| 120 |
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