golang asan_useAfterReturn 代码
文件路径：/misc/cgo/testsanitizers/testdata/asan_useAfterReturn.go
/ 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.
}