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- // 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")
- }
- }
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