1 // run 2 3 // Copyright 2017 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 package main 8 9 import ( 10 "log" 11 "reflect" 12 "runtime" 13 ) 14 15 func hello() string { 16 return "Hello World" // line 16 17 } 18 19 func foo() string { // line 19 20 x := hello() // line 20 21 y := hello() // line 21 22 return x + y // line 22 23 } 24 25 func bar() string { 26 x := hello() // line 26 27 return x 28 } 29 30 // funcPC returns the PC for the func value f. 31 func funcPC(f interface{}) uintptr { 32 return reflect.ValueOf(f).Pointer() 33 } 34 35 // Test for issue #15453. Previously, line 26 would appear in foo(). 36 func main() { 37 pc := funcPC(foo) 38 f := runtime.FuncForPC(pc) 39 for ; runtime.FuncForPC(pc) == f; pc++ { 40 file, line := f.FileLine(pc) 41 if line == 0 { 42 continue 43 } 44 // Line 16 can appear inside foo() because PC-line table has 45 // innermost line numbers after inlining. 46 if line != 16 && !(line >= 19 && line <= 22) { 47 log.Fatalf("unexpected line at PC=%d: %s:%d\n", pc, file, line) 48 } 49 } 50 } 51
