xref: /openbmc/qemu/tests/tcg/multiarch/test-vma.c (revision 05caa062)
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 }
23