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* Copyright (c) 2024 Apple Inc. All rights reserved.
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* @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
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*/
#include <darwintest.h>
#include <darwintest_utils.h>
#include <stdlib.h>
T_GLOBAL_META(
T_META_NAMESPACE("xnu.vm"),
T_META_RADAR_COMPONENT_NAME("xnu"),
T_META_RADAR_COMPONENT_VERSION("VM"),
T_META_OWNER("jharmening"),
T_META_CHECK_LEAKS(false),
T_META_RUN_CONCURRENTLY(true));
#define NUM_IOVS 7
T_DECL(vm_vector_upl,
"Test for vector UPLs",
T_META_TAG_VM_PREFERRED)
{
struct {
uint64_t base;
uint32_t len;
} w_iovs[NUM_IOVS];
int64_t expected_bytes;
int w, w_idx;
T_SETUPBEGIN;
expected_bytes = 0;
for (w = 0; w < NUM_IOVS; w++) {
w_iovs[w].len = (uint32_t) ((w + 1) * (int)PAGE_SIZE);
void *iov_base;
T_QUIET; T_ASSERT_POSIX_SUCCESS(posix_memalign(&iov_base, PAGE_SIZE, w_iovs[w].len), "alloc(w_iov_base[%d])", w);
memset(iov_base, 'a' + w, w_iovs[w].len);
w_iovs[w].base = (uint64_t)iov_base;
expected_bytes += w_iovs[w].len;
}
T_SETUPEND;
struct {
uint64_t iov;
uint16_t iovcnt;
} arg;
arg.iov = (uint64_t) &w_iovs[0];
arg.iovcnt = NUM_IOVS;
int64_t addr = (int64_t)&arg;
int64_t result = 0;
size_t s = sizeof(result);
T_ASSERT_POSIX_SUCCESS(sysctlbyname("debug.test.vm_vector_upl", &result, &s, &addr, sizeof(addr)),
"sysctlbyname(debug.test.vm_vector_upl)");
T_EXPECT_EQ_LLONG(result, expected_bytes, "sysctl output");
w = 0;
w_idx = 0;
/* Validate that the kernel sysctl handler mapped and mutated the page contents as expected. */
for (w = 0; w < NUM_IOVS; w++) {
char *iov_base = (char*)w_iovs[w].base;
for (w_idx = 0; w_idx < w_iovs[w].len; w_idx++) {
T_QUIET; T_ASSERT_EQ(iov_base[w_idx], 'a' + w + 1,
"w_iovs[%d].iov_base[%d]='%c' == '%c'",
w, w_idx, (unsigned char)iov_base[w_idx], (unsigned char)('a' + w + 1));
}
}
T_PASS("%s", __FUNCTION__);
}