#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>
#include <darwintest.h>
#include "jumbo_va_spaces_common.h"
#define GB (1ULL * 1024 * 1024 * 1024)
/*
* This test expects the entitlement to be the enabling factor for a process to
* allocate at least this many GB of VA space. i.e. with the entitlement, n GB
* must be allocatable; whereas without it, it must be less.
* This value was determined experimentally to fit on applicable devices and to
* be clearly distinguishable from the default VA limit.
*/
#define ALLOC_TEST_GB 51
void
verify_jumbo_va(bool entitled)
{
T_LOG("Attemping to allocate VA space in 1 GB chunks.");
void *res;
int i;
for (i = 0; i < (ALLOC_TEST_GB * 2); i++) {
res = mmap(NULL, 1 * GB, PROT_NONE, MAP_PRIVATE | MAP_ANON, 0, 0);
if (res == MAP_FAILED) {
if (errno != ENOMEM) {
T_WITH_ERRNO;
T_LOG("mmap failed: stopped at %d of %d GB allocated", i, ALLOC_TEST_GB);
}
break;
} else {
T_LOG("%d: %p\n", i, res);
}
}
if (entitled) {
T_EXPECT_GE_INT(i, ALLOC_TEST_GB, "Allocate at least %d GB of VA space", ALLOC_TEST_GB);
} else {
T_EXPECT_LT_INT(i, ALLOC_TEST_GB, "Not permitted to allocate %d GB of VA space", ALLOC_TEST_GB);
}
}