/*
* Copyright (c) 2024 Apple Inc. All rights reserved.
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*
* 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
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* may not be used to create, or enable the creation or redistribution of,
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* circumvent, violate, or enable the circumvention or violation of, any
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*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
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#if DEVELOPMENT || DEBUG
#include <kern/bits.h>
static int
sysctl_test_memmove(__unused int64_t in, __unused int64_t *out)
{
// Ensure our platform-specific memmove implements correct semantics
extern void *__xnu_memmove(
void *dst __sized_by(n),
const void *src __sized_by(n),
size_t n) __asm("_memmove");
// Given two buffers
int dest = 0;
int source = 42;
// When I call our platform-specific memmove implementation
void* memmove_ret = __xnu_memmove(&dest, &source, sizeof(int));
// Then the value of `src` has been copied to `dst`
if (dest != 42) {
return KERN_FAILURE;
}
// And `src` is unmodified
if (source != 42) {
return KERN_FAILURE;
}
// And the return value is the `dest` pointer we passed in
if (memmove_ret != &dest) {
return KERN_FAILURE;
}
return KERN_SUCCESS;
}
SYSCTL_TEST_REGISTER(test_memmove, sysctl_test_memmove);
#endif /* DEBUG || DEVELOPMENT */