Make sure that the stack is not shared.

2 files changed, 54 insertions, 0 deletions

diff --git a/regress/sys/kern/rfork/rfmem-stack/Makefile b/regress/sys/kern/rfork/rfmem-stack/Makefile
new file mode 100644
index 00000000000..491df13bda7
--- /dev/null
+++ b/regress/sys/kern/rfork/rfmem-stack/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/21 21:07:11 art Exp $
+
+PROG=rfmem-stack
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/rfork/rfmem-stack/rfmem-stack.c b/regress/sys/kern/rfork/rfmem-stack/rfmem-stack.c
new file mode 100644
index 00000000000..a75b1be6bd1
--- /dev/null
+++ b/regress/sys/kern/rfork/rfmem-stack/rfmem-stack.c
@@ -0,0 +1,49 @@
+/*	$OpenBSD: rfmem-stack.c,v 1.1 2002/02/21 21:07:11 art Exp $	*/
+/*
+ * Written by Artur Grabowski <art@openbsd.org>, 2002 Public Domain.
+ */
+#include <sys/param.h>
+#include <sys/wait.h>
+#include <sys/mman.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+
+#define MAGIC "inherited"
+
+int
+main()
+{
+	char *map, *map2;
+	int status;
+
+	map = alloca(sizeof(MAGIC));
+	memset(map, 0, sizeof(MAGIC));
+
+	map2 = alloca(sizeof(MAGIC));
+	memset(map2, 0, sizeof(MAGIC));
+
+	switch(rfork(RFFDG|RFPROC|RFMEM)) {
+	case -1:
+		err(1, "fork");
+	case 0:
+		memcpy(map, MAGIC, sizeof(MAGIC));
+		sleep(1);
+		if (memcmp(map2, MAGIC, sizeof(MAGIC)) == 0);
+			fprintf(stderr, "child stack polluted\n");
+		_exit(0);
+	}
+
+	if (wait(&status) < 0)
+		err(1, "wait");
+
+	if (!WIFEXITED(status))
+		err(1, "child error");
+
+	if (memcmp(map, MAGIC, sizeof(MAGIC)) == 0)
+		return 1;
+
+	return WEXITSTATUS(status) != 0;
+}
\ No newline at end of file