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https://github.com/golang/go
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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.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cgotest
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/*
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typedef void *HANDLE;
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struct HWND__{int unused;}; typedef struct HWND__ *HWND;
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*/
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import "C"
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import (
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"testing"
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"unsafe"
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)
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func test42018(t *testing.T) {
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// Test that Windows handles are marked go:notinheap, by growing the
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// stack and checking for pointer adjustments. Trick from
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// test/fixedbugs/issue40954.go.
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var i int
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handle := C.HANDLE(unsafe.Pointer(uintptr(unsafe.Pointer(&i))))
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recurseHANDLE(100, handle, uintptr(unsafe.Pointer(&i)))
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hwnd := C.HWND(unsafe.Pointer(uintptr(unsafe.Pointer(&i))))
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recurseHWND(400, hwnd, uintptr(unsafe.Pointer(&i)))
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}
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func recurseHANDLE(n int, p C.HANDLE, v uintptr) {
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if n > 0 {
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recurseHANDLE(n-1, p, v)
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}
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if uintptr(unsafe.Pointer(p)) != v {
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panic("adjusted notinheap pointer")
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}
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}
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func recurseHWND(n int, p C.HWND, v uintptr) {
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if n > 0 {
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recurseHWND(n-1, p, v)
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}
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if uintptr(unsafe.Pointer(p)) != v {
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panic("adjusted notinheap pointer")
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}
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}
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