tests/tcg/multiarch/test-vma.c

   1 /*
   2  * Test very large vma allocations.
   3  * The qemu out-of-memory condition was within the mmap syscall itself.
   4  * If the syscall actually returns with MAP_FAILED, the test succeeded.
   5  */
   6 #include <sys/mman.h>
   7
   8 int main()
   9 {
  10     int n = sizeof(size_t) == 4 ? 32 : 45;
  11
  12     for (int i = 28; i < n; i++) {
  13         size_t l = (size_t)1 << i;
  14         void *p = mmap(0, l, PROT_NONE,
  15                        MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
  16         if (p == MAP_FAILED) {
  17             break;
  18         }
  19         munmap(p, l);
  20     }
  21     return 0;
  22 }