- ret = mmap(req, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+ if (need_exec)
+ prot |= PROT_EXEC;
+ if (is_fixed)
+ flags |= MAP_FIXED;
+ if (size >= HUGETLB_THRESHOLD && !hugetlb_disabled)
+ flags |= MAP_HUGETLB;
+
+ ret = mmap(req, size, prot, flags, -1, 0);
+ if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) {
+ fprintf(stderr,
+ "warning: failed to do hugetlb mmap (%p, %zu): %d\n",
+ req, size, errno);
+ hugetlb_disabled = 1;
+ flags &= ~MAP_HUGETLB;
+ ret = mmap(req, size, prot, flags, -1, 0);
+ }