mirror of
https://github.com/golang/go
synced 2024-11-23 01:30:02 -07:00
51 lines
1.0 KiB
Go
51 lines
1.0 KiB
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2017 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"log"
|
||
|
|
"reflect"
|
||
|
|
"runtime"
|
||
|
|
)
|
||
|
|
|
||
|
|
func hello() string {
|
||
|
|
return "Hello World" // line 16
|
||
|
|
}
|
||
|
|
|
||
|
|
func foo() string { // line 19
|
||
|
|
x := hello() // line 20
|
||
|
|
y := hello() // line 21
|
||
|
|
return x + y // line 22
|
||
|
|
}
|
||
|
|
|
||
|
|
func bar() string {
|
||
|
|
x := hello() // line 26
|
||
|
|
return x
|
||
|
|
}
|
||
|
|
|
||
|
|
// funcPC returns the PC for the func value f.
|
||
|
|
func funcPC(f interface{}) uintptr {
|
||
|
|
return reflect.ValueOf(f).Pointer()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test for issue #15453. Previously, line 26 would appear in foo().
|
||
|
|
func main() {
|
||
|
|
pc := funcPC(foo)
|
||
|
|
f := runtime.FuncForPC(pc)
|
||
|
|
for ; runtime.FuncForPC(pc) == f; pc++ {
|
||
|
|
file, line := f.FileLine(pc)
|
||
|
|
if line == 0 {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
// Line 16 can appear inside foo() because PC-line table has
|
||
|
|
// innermost line numbers after inlining.
|
||
|
|
if line != 16 && !(line >= 19 && line <= 22) {
|
||
|
|
log.Fatalf("unexpected line at PC=%d: %s:%d\n", pc, file, line)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|