| 1 | package main |
|---|---|
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | ) |
| 6 | |
| 7 | // Tests of call-graph queries. |
| 8 | // See go.tools/guru/guru_test.go for explanation. |
| 9 | // See calls.golden for expected query results. |
| 10 | |
| 11 | func A(x *int) { // @pointsto pointsto-A-x "x" |
| 12 | // @callers callers-A "^" |
| 13 | // @callstack callstack-A "^" |
| 14 | } |
| 15 | |
| 16 | func B(x *int) { // @pointsto pointsto-B-x "x" |
| 17 | // @callers callers-B "^" |
| 18 | } |
| 19 | |
| 20 | func foo() { |
| 21 | } |
| 22 | |
| 23 | // apply is not (yet) treated context-sensitively. |
| 24 | func apply(f func(x *int), x *int) { |
| 25 | f(x) // @callees callees-apply "f" |
| 26 | // @callers callers-apply "^" |
| 27 | } |
| 28 | |
| 29 | // store *is* treated context-sensitively, |
| 30 | // so the points-to sets for pc, pd are precise. |
| 31 | func store(ptr **int, value *int) { |
| 32 | *ptr = value |
| 33 | // @callers callers-store "^" |
| 34 | } |
| 35 | |
| 36 | func call(f func() *int) { |
| 37 | // Result points to anon function. |
| 38 | f() // @pointsto pointsto-result-f "f" |
| 39 | |
| 40 | // Target of call is anon function. |
| 41 | f() // @callees callees-main.call-f "f" |
| 42 | |
| 43 | // @callers callers-main.call "^" |
| 44 | } |
| 45 | |
| 46 | func main() { |
| 47 | var a, b int |
| 48 | go apply(A, &a) // @callees callees-main-apply1 "app" |
| 49 | defer apply(B, &b) |
| 50 | |
| 51 | var c, d int |
| 52 | var pc, pd *int // @pointsto pointsto-pc "pc" |
| 53 | store(&pc, &c) |
| 54 | store(&pd, &d) |
| 55 | _ = pd // @pointsto pointsto-pd "pd" |
| 56 | |
| 57 | call(func() *int { |
| 58 | // We are called twice from main.call |
| 59 | // @callers callers-main.anon "^" |
| 60 | return &a |
| 61 | }) |
| 62 | |
| 63 | // Errors |
| 64 | _ = "no function call here" // @callees callees-err-no-call "no" |
| 65 | print("builtin") // @callees callees-err-builtin "builtin" |
| 66 | _ = string("type conversion") // @callees callees-err-conversion "str" |
| 67 | call(nil) // @callees callees-err-bad-selection "call\\(nil" |
| 68 | if false { |
| 69 | main() // @callees callees-err-deadcode1 "main" |
| 70 | } |
| 71 | var nilFunc func() |
| 72 | nilFunc() // @callees callees-err-nil-func "nilFunc" |
| 73 | var i interface { |
| 74 | f() |
| 75 | } |
| 76 | i.f() // @callees callees-err-nil-interface "i.f" |
| 77 | |
| 78 | i = new(myint) |
| 79 | i.f() // @callees callees-not-a-wrapper "f" |
| 80 | |
| 81 | // statically dispatched calls. Handled specially by callees, so test that they work. |
| 82 | foo() // @callees callees-static-call "foo" |
| 83 | fmt.Println() // @callees callees-qualified-call "Println" |
| 84 | m := new(method) |
| 85 | m.f() // @callees callees-static-method-call "f" |
| 86 | g := new(embeddedIface) |
| 87 | g.iface = m |
| 88 | g.f() // @callees callees-implicit-selection-method-call "f" |
| 89 | } |
| 90 | |
| 91 | type myint int |
| 92 | |
| 93 | func (myint) f() { |
| 94 | // @callers callers-not-a-wrapper "^" |
| 95 | } |
| 96 | |
| 97 | type method int |
| 98 | |
| 99 | func (method) f() { |
| 100 | } |
| 101 | |
| 102 | type embeddedIface struct { |
| 103 | iface |
| 104 | } |
| 105 | |
| 106 | type iface interface { |
| 107 | f() |
| 108 | } |
| 109 | |
| 110 | var dynamic = func() {} |
| 111 | |
| 112 | func deadcode() { |
| 113 | main() // @callees callees-err-deadcode2 "main" |
| 114 | // @callers callers-err-deadcode "^" |
| 115 | // @callstack callstack-err-deadcode "^" |
| 116 | |
| 117 | // Within dead code, dynamic calls have no callees. |
| 118 | dynamic() // @callees callees-err-deadcode3 "dynamic" |
| 119 | } |
| 120 | |
| 121 | // This code belongs to init. |
| 122 | var global = 123 // @callers callers-global "global" |
| 123 | |
| 124 | // The package initializer may be called by other packages' inits, or |
| 125 | // in this case, the root of the callgraph. The source-level init functions |
| 126 | // are in turn called by it. |
| 127 | func init() { |
| 128 | // @callstack callstack-init "^" |
| 129 | } |
| 130 |
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