File: rtti.go

package info (click to toggle)
golang-golang-x-tools 1%3A0.0~git20190125.d66bd3c%2Bds-4
  • links: PTS, VCS
  • area: main
  • in suites: buster, buster-backports
  • size: 8,912 kB
  • sloc: asm: 1,394; yacc: 155; makefile: 109; sh: 108; ansic: 17; xml: 11
file content (29 lines) | stat: -rw-r--r-- 649 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
package main

// Regression test for guru crash
// https://code.google.com/p/go/issues/detail?id=6605
//
// Using reflection, methods may be called on types that are not the
// operand of any ssa.MakeInterface instruction.  In this example,
// (Y).F is called by deriving the type Y from *Y.  Prior to the fix,
// no RTTI (or method set) for type Y was included in the program, so
// the F() call would crash.

import "reflect"

var a int

type X struct{}

func (X) F() *int {
	return &a
}

type I interface {
	F() *int
}

func main() {
	type Y struct{ X }
	print(reflect.Indirect(reflect.ValueOf(new(Y))).Interface().(I).F()) // @pointsto main.a
}