Add pagefault to asharing vm2

ab154d36 · Austin Clements · 5f68e711 · ab154d36
--- a/bin/asharing.cc
+++ b/bin/asharing.cc
@@ -95,6 +95,9 @@ vm2sharing(void *arg)
                       MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0);
      if (res == MAP_FAILED)
        die("asharing: mmap failed");
+      // Fault
+      for (int i = lo; i < hi; i++)
+        base[i * 4096] = 42;
    } else {
      // Unmap
      int res = munmap(base + lo * 4096, (hi-lo) * 4096);