| 1 | // Copyright 2021 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package a |
| 6 | |
| 7 | // This file tests facts produced by ctrlflow. |
| 8 | |
| 9 | import ( |
| 10 | "log" |
| 11 | "os" |
| 12 | "runtime" |
| 13 | "syscall" |
| 14 | "testing" |
| 15 | |
| 16 | "lib" |
| 17 | ) |
| 18 | |
| 19 | var cond bool |
| 20 | |
| 21 | func a() { // want a:"noReturn" |
| 22 | if cond { |
| 23 | b() |
| 24 | } else { |
| 25 | for { |
| 26 | } |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | func b() { // want b:"noReturn" |
| 31 | select {} |
| 32 | } |
| 33 | |
| 34 | func f(x int) { // no fact here |
| 35 | switch x { |
| 36 | case 0: |
| 37 | os.Exit(0) |
| 38 | case 1: |
| 39 | panic(0) |
| 40 | } |
| 41 | // default case returns |
| 42 | } |
| 43 | |
| 44 | type T int |
| 45 | |
| 46 | func (T) method1() { // want method1:"noReturn" |
| 47 | a() |
| 48 | } |
| 49 | |
| 50 | func (T) method2() { // (may return) |
| 51 | if cond { |
| 52 | a() |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | // Checking for the noreturn fact associated with F ensures that |
| 57 | // ctrlflow proved each of the listed functions was "noReturn". |
| 58 | // |
| 59 | func standardFunctions(x int) { // want standardFunctions:"noReturn" |
| 60 | t := new(testing.T) |
| 61 | switch x { |
| 62 | case 0: |
| 63 | t.FailNow() |
| 64 | case 1: |
| 65 | t.Fatal() |
| 66 | case 2: |
| 67 | t.Fatalf("") |
| 68 | case 3: |
| 69 | t.Skip() |
| 70 | case 4: |
| 71 | t.SkipNow() |
| 72 | case 5: |
| 73 | t.Skipf("") |
| 74 | case 6: |
| 75 | log.Fatal() |
| 76 | case 7: |
| 77 | log.Fatalf("") |
| 78 | case 8: |
| 79 | log.Fatalln() |
| 80 | case 9: |
| 81 | os.Exit(0) |
| 82 | case 10: |
| 83 | syscall.Exit(0) |
| 84 | case 11: |
| 85 | runtime.Goexit() |
| 86 | case 12: |
| 87 | log.Panic() |
| 88 | case 13: |
| 89 | log.Panicln() |
| 90 | case 14: |
| 91 | log.Panicf("") |
| 92 | default: |
| 93 | panic(0) |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | // False positives are possible. |
| 98 | // This function is marked noReturn but in fact returns. |
| 99 | // |
| 100 | func spurious() { // want spurious:"noReturn" |
| 101 | defer func() { recover() }() |
| 102 | panic(nil) |
| 103 | } |
| 104 | |
| 105 | func noBody() |
| 106 | |
| 107 | func g() { |
| 108 | lib.CanReturn() |
| 109 | } |
| 110 | |
| 111 | func h() { // want h:"noReturn" |
| 112 | lib.NoReturn() |
| 113 | } |
| 114 |
Members