Add simple tests which verify that redzone(9) works properly.

4 files changed, 167 insertions, 0 deletions

diff --git a/tools/regression/redzone9/Makefile b/tools/regression/redzone9/Makefile
new file mode 100644
index 0000000..6de1535
--- /dev/null
+++ b/tools/regression/redzone9/Makefile
@@ -0,0 +1,6 @@
+# $FreeBSD$
+
+KMOD=	redzone
+SRCS=	redzone.c
+
+.include <bsd.kmod.mk>
diff --git a/tools/regression/redzone9/README b/tools/regression/redzone9/README
new file mode 100644
index 0000000..87ca49a
--- /dev/null
+++ b/tools/regression/redzone9/README
@@ -0,0 +1,10 @@
+$FreeBSD$
+
+To verify that redzone(9) works properly:
+
+	# make
+	# make install
+	# kldload redzone
+	# sh test.sh
+
+And look at the logs/console output.
diff --git a/tools/regression/redzone9/redzone.c b/tools/regression/redzone9/redzone.c
new file mode 100644
index 0000000..1013738
--- /dev/null
+++ b/tools/regression/redzone9/redzone.c
@@ -0,0 +1,141 @@
+/*-
+ * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/linker.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/sysctl.h>
+
+
+SYSCTL_NODE(_debug, OID_AUTO, redzone, CTLFLAG_RW, 0, "");
+
+#define	REDZONE_MALLOC_UNDERFLOW		0
+#define	REDZONE_MALLOC_OVERFLOW			1
+#define	REDZONE_REALLOC_SMALLER_UNDERFLOW	2
+#define	REDZONE_REALLOC_SMALLER_OVERFLOW	3
+#define	REDZONE_REALLOC_BIGGER_UNDERFLOW	4
+#define	REDZONE_REALLOC_BIGGER_OVERFLOW		5
+
+static int
+redzone_sysctl(SYSCTL_HANDLER_ARGS)
+{
+	u_char *p = NULL;
+	int error, val = 0;
+
+	error = sysctl_handle_int(oidp, &val, sizeof(val), req);
+	if (error != 0 || req->newptr == NULL)
+		return (0);
+	switch (arg2) {
+	case REDZONE_MALLOC_UNDERFLOW:
+		p = malloc(10, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		p[-1] = '\0';
+		break;
+	case REDZONE_MALLOC_OVERFLOW:
+		p = malloc(10, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		p[10] = '\0';
+		break;
+	case REDZONE_REALLOC_SMALLER_UNDERFLOW:
+		p = malloc(8192, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		p[-1] = '\0';
+		p = realloc(p, 10, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		break;
+	case REDZONE_REALLOC_SMALLER_OVERFLOW:
+		p = malloc(8192, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		p[8192] = '\0';
+		p = realloc(p, 10, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		break;
+	case REDZONE_REALLOC_BIGGER_UNDERFLOW:
+		p = malloc(10, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		p[-1] = '\0';
+		p = realloc(p, 8192, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		break;
+	case REDZONE_REALLOC_BIGGER_OVERFLOW:
+		p = malloc(10, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		p[10] = '\0';
+		p = realloc(p, 8192, M_TEMP, M_NOWAIT);
+		if (p == NULL)
+			return (ENOMEM);
+		break;
+	}
+	free(p, M_TEMP);
+        return (0);
+}
+SYSCTL_PROC(_debug_redzone, OID_AUTO, malloc_underflow, CTLTYPE_INT | CTLFLAG_RW,
+    NULL, REDZONE_MALLOC_UNDERFLOW, redzone_sysctl, "I", "");
+SYSCTL_PROC(_debug_redzone, OID_AUTO, malloc_overflow, CTLTYPE_INT | CTLFLAG_RW,
+    NULL, REDZONE_MALLOC_OVERFLOW, redzone_sysctl, "I", "");
+SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_smaller_underflow, CTLTYPE_INT | CTLFLAG_RW,
+    NULL, REDZONE_REALLOC_SMALLER_UNDERFLOW, redzone_sysctl, "I", "");
+SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_smaller_overflow, CTLTYPE_INT | CTLFLAG_RW,
+    NULL, REDZONE_REALLOC_SMALLER_OVERFLOW, redzone_sysctl, "I", "");
+SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_bigger_underflow, CTLTYPE_INT | CTLFLAG_RW,
+    NULL, REDZONE_REALLOC_BIGGER_UNDERFLOW, redzone_sysctl, "I", "");
+SYSCTL_PROC(_debug_redzone, OID_AUTO, realloc_bigger_overflow, CTLTYPE_INT | CTLFLAG_RW,
+    NULL, REDZONE_REALLOC_BIGGER_OVERFLOW, redzone_sysctl, "I", "");
+
+static int
+redzone_modevent(module_t mod, int type, void *data)
+{
+
+	switch (type) {
+	case MOD_LOAD:
+	case MOD_UNLOAD:
+		break;
+	default:
+		return (EOPNOTSUPP);
+	}
+	return (0);
+}
+static moduledata_t redzone_module = {
+	"redzone",
+	redzone_modevent,
+	NULL
+};
+DECLARE_MODULE(redzone, redzone_module, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
diff --git a/tools/regression/redzone9/test.sh b/tools/regression/redzone9/test.sh
new file mode 100644
index 0000000..b382458
--- /dev/null
+++ b/tools/regression/redzone9/test.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+#
+# $FreeBSD$
+
+sysctl debug.redzone.malloc_underflow=1
+sysctl debug.redzone.malloc_overflow=1
+sysctl debug.redzone.realloc_smaller_underflow=1
+sysctl debug.redzone.realloc_smaller_overflow=1
+sysctl debug.redzone.realloc_bigger_underflow=1
+sysctl debug.redzone.realloc_bigger_overflow=1