1 #include <darwintest.h> 2 #include <sys/sysctl.h> 3 #include <sys/errno.h> 4 5 #define MAX_TASK_PMEM "kern.max_task_pmem" 6 #define HW_MEMSIZE_STR "hw.memsize" 7 #define HW_MEMSIZE_THRESHOLD 600 * 1024 * 1024 8 9 T_GLOBAL_META( 10 T_META_NAMESPACE("xnu.vm"), 11 T_META_RADAR_COMPONENT_NAME("xnu"), 12 T_META_RADAR_COMPONENT_VERSION("VM")); 13 14 /* 15 * Embedded Device having physical memory greater than 600MB should have positive 16 * value for kern.max_task_pmem if present. 17 * Strategy: 18 * Fetch hw.memsize for the device. 19 * If hw.memsize > 600MB, and kern.max_task_pmem is present, assert that 20 * kern.max_task_pmem is set to value > 0. 21 */ 22 T_DECL(kern_max_task_pmem, 23 "Embedded platforms should have a positive value for kern.max_task_pmem when hw.memsize > 600MB", 24 T_META_TAG_VM_PREFERRED, 25 T_META_ENABLED(false /* rdar://133954365 */)) 26 { 27 int kern_max_task_pmem = 0; 28 size_t pmem_size = sizeof(kern_max_task_pmem); 29 30 uint64_t hw_memsize = 0; 31 size_t size_hw_memsize = sizeof(hw_memsize); 32 33 int ret = 0; 34 35 ret = sysctlbyname(HW_MEMSIZE_STR, &hw_memsize, &size_hw_memsize, NULL, 0); 36 T_ASSERT_POSIX_SUCCESS(ret, "call sysctlbyname to get hardware mem size."); 37 38 T_LOG("Checking if %s > %d", HW_MEMSIZE_STR, HW_MEMSIZE_THRESHOLD); 39 if (hw_memsize <= HW_MEMSIZE_THRESHOLD) { 40 T_SKIP("Device has hw.memsize = %lld. Skipping the check for %s", hw_memsize, MAX_TASK_PMEM); 41 } 42 43 T_LOG("Device has %s = %lld", HW_MEMSIZE_STR, hw_memsize); 44 T_LOG("Testing for %s ...", MAX_TASK_PMEM); 45 46 ret = sysctlbyname(MAX_TASK_PMEM, &kern_max_task_pmem, &pmem_size, NULL, 0); 47 T_ASSERT_POSIX_SUCCESS(ret, "call sysctlbyname to get max task physical memory"); 48 49 T_LOG("%s = %d", MAX_TASK_PMEM, kern_max_task_pmem); 50 T_ASSERT_GT_INT(kern_max_task_pmem, 0, "%s should be greater than 0", MAX_TASK_PMEM); 51 } 52