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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /* * 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()"); } |