tests/vm/page_size_globals.c

   1 #include <darwintest.h>
   2 #include <mach/vm_page_size.h>
   3
   4 T_GLOBAL_META(
   5         T_META_NAMESPACE("vm_page_size_overrides")
   6         );
   7
   8 static void
   9 verify_page_size(
  10         int expected_shift,
  11         int page_shift,
  12         vm_size_t page_size,
  13         vm_size_t page_mask)
  14 {
  15         T_ASSERT_EQ(page_shift, expected_shift, "page_shift");
  16         T_ASSERT_EQ(page_size, 1UL << expected_shift, "page_size");
  17         T_ASSERT_EQ(page_mask, page_size - 1, "page_mask");
  18 }
  19
  20
  21 T_DECL(kernel_4k,
  22     "Can override vm_kernel_page_size",
  23     T_META_ENVVAR("VM_KERNEL_PAGE_SIZE_4K=1"),
  24     T_META_ENVVAR("MallocGuardEdges=0"),
  25     T_META_ENVVAR("MallocDoNotProtectPrelude=1"),
  26     T_META_ENVVAR("MallocDoNotProtectPostlude=1"))
  27 {
  28         verify_page_size(12, vm_kernel_page_shift, vm_kernel_page_size, vm_kernel_page_mask);
  29 }
  30
  31 T_DECL(invalid,
  32     "Invalid overrides",
  33     T_META_ENVVAR("VM_KERNEL_PAGE_SIZE_4K=2"),
  34     T_META_ENVVAR("VM_KERNEL_PAGE_SIZE=4K"),
  35     T_META_ENVVAR("VM_KERNEL_PAGE_SIZE="))
  36 {
  37         /*
  38          * This test just verifies that libkernel_init doesn't
  39          * crash when handling invalid overrides.
  40          * So if we got here, we can pass the test.
  41          */
  42         T_PASS("Test process spawned");
  43 }