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// Copyright 2021 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
//go:build linux
// +build linux
package osutil
import (
"fmt"
"os"
"golang.org/x/sys/unix"
)
// In the case of Linux, we can just use the memfd_create syscall.
func CreateSharedMemFile(size int) (f *os.File, err error) {
// The name is actually irrelevant and can even be the same for all such files.
fd, err := unix.MemfdCreate("syz-shared-mem", 0)
if err != nil {
err = fmt.Errorf("failed to do memfd_create: %v", err)
return
}
f = os.NewFile(uintptr(fd), fmt.Sprintf("/proc/self/fd/%d", fd))
return
}
func CloseSharedMemFile(f *os.File) error {
return f.Close()
}
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