issue34123.go

     1  // run
     2  
     3  // Copyright 2019 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  // Make sure that the line number is reported correctly
     8  // for faulting instructions.
     9  
    10  package main
    11  
    12  import (
    13  	"fmt"
    14  	"runtime"
    15  )
    16  
    17  var x byte
    18  var p *byte
    19  
    20  //go:noinline
    21  func f() {
    22  	q := p
    23  	x = 11  // line 23
    24  	*q = 12 // line 24
    25  }
    26  func main() {
    27  	defer func() {
    28  		recover()
    29  		var pcs [10]uintptr
    30  		n := runtime.Callers(1, pcs[:])
    31  		frames := runtime.CallersFrames(pcs[:n])
    32  		for {
    33  			f, more := frames.Next()
    34  			if f.Function == "main.f" && f.Line != 24 {
    35  				panic(fmt.Errorf("expected line 24, got line %d", f.Line))
    36  			}
    37  			if !more {
    38  				break
    39  			}
    40  		}
    41  	}()
    42  	f()
    43  }
    44
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