mirror of
https://github.com/golang/go
synced 2024-11-17 06:04:47 -07:00
635e49388b
Fixes #42018 Change-Id: I6a40f3effe860e67a45fca2e8ab86f3e9887ffee Reviewed-on: https://go-review.googlesource.com/c/go/+/350070 Trust: Elias Naur <mail@eliasnaur.com> Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Keith Randall <khr@golang.org>
47 lines
1.1 KiB
Go
47 lines
1.1 KiB
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 cgotest
|
|
|
|
/*
|
|
typedef void *HANDLE;
|
|
|
|
struct HWND__{int unused;}; typedef struct HWND__ *HWND;
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"testing"
|
|
"unsafe"
|
|
)
|
|
|
|
func test42018(t *testing.T) {
|
|
// Test that Windows handles are marked go:notinheap, by growing the
|
|
// stack and checking for pointer adjustments. Trick from
|
|
// test/fixedbugs/issue40954.go.
|
|
var i int
|
|
handle := C.HANDLE(unsafe.Pointer(uintptr(unsafe.Pointer(&i))))
|
|
recurseHANDLE(100, handle, uintptr(unsafe.Pointer(&i)))
|
|
hwnd := C.HWND(unsafe.Pointer(uintptr(unsafe.Pointer(&i))))
|
|
recurseHWND(400, hwnd, uintptr(unsafe.Pointer(&i)))
|
|
}
|
|
|
|
func recurseHANDLE(n int, p C.HANDLE, v uintptr) {
|
|
if n > 0 {
|
|
recurseHANDLE(n-1, p, v)
|
|
}
|
|
if uintptr(unsafe.Pointer(p)) != v {
|
|
panic("adjusted notinheap pointer")
|
|
}
|
|
}
|
|
|
|
func recurseHWND(n int, p C.HWND, v uintptr) {
|
|
if n > 0 {
|
|
recurseHWND(n-1, p, v)
|
|
}
|
|
if uintptr(unsafe.Pointer(p)) != v {
|
|
panic("adjusted notinheap pointer")
|
|
}
|
|
}
|