| // Copyright 2021 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 |
| |
| // The -fsanitize=address option of C compier can detect stack-use-after-return bugs. |
| // In the following program, the local variable 'local' was moved to heap by the Go |
| // compiler because foo() is returning the reference to 'local', and return stack of |
| // foo() will be invalid. Thus for main() to use the reference to 'local', the 'local' |
| // must be available even after foo() has finished. Therefore, Go has no such issue. |
| |
| import "fmt" |
| |
| var ptr *int |
| |
| func main() { |
| foo() |
| fmt.Printf("ptr=%x, %v", *ptr, ptr) |
| } |
| |
| func foo() { |
| var local int |
| local = 1 |
| ptr = &local // local is moved to heap. |
| } |
