tests/vm/retired_pages.c

   1 #include <sys/sysctl.h>
   2 #include <time.h>
   3
   4 #include <darwintest.h>
   5
   6 /*
   7  * trying phys offsets from start of dram of:
   8  * watchOS 512Meg
   9  * macOS 3Gig
  10  * iOS,etc. 750Meg
  11  */
  12 #if TARGET_OS_WATCH
  13 #define USEBOOTARG "bad_ram_pages=536870912 bad_static_mfree=1"
  14 #elif TARGET_OS_OSX
  15 #define USEBOOTARG "bad_ram_pages=3221225472 bad_static_mfree=1"
  16 #else
  17 #define USEBOOTARG "bad_ram_pages=786432000 bad_static_mfree=1"
  18 #endif
  19
  20 T_DECL(retired_pages_test,
  21     "Test retiring pages at boot",
  22     T_META_NAMESPACE("xnu.vm"),
  23     T_META_BOOTARGS_SET(USEBOOTARG),
  24     T_META_ASROOT(true),
  25     T_META_CHECK_LEAKS(false))
  26 {
  27         int err;
  28         unsigned int count = 0;
  29         size_t s = sizeof(count);
  30
  31 #if !defined(__arm64__) || TARGET_OS_BRIDGE
  32         T_SKIP("No page retirement on x86, arm32 or bridgeOS kernels");
  33 #endif
  34         /*
  35          * Get the number of pages retired from the kernel
  36          */
  37         err = sysctlbyname("vm.retired_pages_count", &count, &s, NULL, 0);
  38
  39         /* If the sysctl isn't supported, test succeeds */
  40         if (err == ENOENT) {
  41                 T_SKIP("sysctl vm.retired_pages_count not found, skipping test");
  42         }
  43         T_ASSERT_POSIX_SUCCESS(err, "sysctl vm.retired_pages_count");
  44
  45         T_ASSERT_GT_INT(count, 0, "Expect retired pages");
  46 }