/*
* Copyright (c) 2022 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <darwintest.h>
#include <TargetConditionals.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <mach/mach_error.h>
#include <mach/mach_init.h>
#include <mach/mach_vm.h>
T_GLOBAL_META(
T_META_NAMESPACE("xnu.vm"),
T_META_RADAR_COMPONENT_NAME("xnu"),
T_META_RADAR_COMPONENT_VERSION("VM"));
T_DECL(wire_copy_share,
"test VM object wired, copied and shared", T_META_TAG_VM_PREFERRED)
{
kern_return_t kr;
mach_vm_address_t vmaddr1, vmaddr2, vmaddr3;
mach_vm_size_t vmsize;
char *cp;
int i;
vm_prot_t cur_prot, max_prot;
int ret;
/* allocate anonymous memory */
vmaddr1 = 0;
vmsize = 32 * PAGE_SIZE;
kr = mach_vm_allocate(
mach_task_self(),
&vmaddr1,
vmsize,
VM_FLAGS_ANYWHERE);
T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "vm_allocate()");
/* populate it */
cp = (char *)(uintptr_t)vmaddr1;
for (i = 0; i < vmsize; i += PAGE_SIZE) {
cp[i] = i;
}
/* wire one page */
ret = mlock(cp, PAGE_SIZE);
T_QUIET; T_ASSERT_POSIX_SUCCESS(ret, "mlock()");
/* create a range to receive a copy */
vmaddr2 = 0;
kr = mach_vm_allocate(
mach_task_self(),
&vmaddr2,
vmsize - PAGE_SIZE,
VM_FLAGS_ANYWHERE);
T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "vm_allocate() for copy");
/* copy the rest of the original object */
kr = mach_vm_copy(
mach_task_self(),
vmaddr1 + PAGE_SIZE,
vmsize - PAGE_SIZE,
vmaddr2);
T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "vm_copy()");
/* share the whole thing */
vmaddr3 = 0;
kr = mach_vm_remap(
mach_task_self(),
&vmaddr3,
vmsize,
0, /* mask */
VM_FLAGS_ANYWHERE,
mach_task_self(),
vmaddr1,
FALSE, /* copy */
&cur_prot,
&max_prot,
VM_INHERIT_DEFAULT);
T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "vm_remap()");
}