Near ulimit test case 1

2 files changed, 48 insertions, 0 deletions

diff --git a/src/regress/lib/libc/malloc/malloc_ulimit1/Makefile b/src/regress/lib/libc/malloc/malloc_ulimit1/Makefile
new file mode 100644
index 0000000000..46ced27a98
--- /dev/null
+++ b/src/regress/lib/libc/malloc/malloc_ulimit1/Makefile
@@ -0,0 +1,5 @@
+#       $OpenBSD: Makefile,v 1.1 2006/04/18 19:03:30 otto Exp $
+
+PROG=   malloc_ulimit1
+
+.include <bsd.regress.mk>
diff --git a/src/regress/lib/libc/malloc/malloc_ulimit1/malloc_ulimit1.c b/src/regress/lib/libc/malloc/malloc_ulimit1/malloc_ulimit1.c
new file mode 100644
index 0000000000..faa98c7bd6
--- /dev/null
+++ b/src/regress/lib/libc/malloc/malloc_ulimit1/malloc_ulimit1.c
@@ -0,0 +1,43 @@
+/*      $OpenBSD: malloc_ulimit1.c,v 1.1 2006/04/18 19:03:30 otto Exp $ */
+
+/* Public Domain, 2006, Otto Moerbeek <otto@drijf.net> */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <err.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/*
+ * This code tries to trigger the case present in -current as of April
+ * 2006) where the allocation of the region itself succeeds, but the
+ * page dir entry pages fails.
+ * This in turn trips a "hole in directories" error.
+ * Having a large (512M) ulimit -m helps a lot in triggering the 
+ * problem. Note that you may need to run this test multiple times to
+ * see the error.
+*/
+
+#define STARTI  1300
+#define FACTOR  1024
+
+main()
+{
+        struct rlimit lim;
+        size_t sz;
+        int i;
+        void *p;
+
+        if (getrlimit(RLIMIT_DATA, &lim) == -1)
+                err(1, "getrlimit");
+
+        sz = lim.rlim_cur / FACTOR;
+
+        for (i = STARTI; i >= 0; i--) {
+                size_t len = (sz-i) * FACTOR;
+                p = malloc(len);
+                free(p);
+                free(malloc(4096));
+        }
+}