[src/trunk]: src/tests/lib/libc/sys A test case for serious PR kern/38889: cr...

[jruoho <jruoho%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bbd42c34d05f
branches:  trunk
changeset: 777850:bbd42c34d05f
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Tue Mar 06 11:02:55 2012 +0000

description:
A test case for serious PR kern/38889: crash on open/mmap/close of block
device. The test case is skipped for the time being as it replicates the
panic described in the PR (tested on NetBSD/amd64 6.0 BETA).

diffstat:

 tests/lib/libc/sys/t_mmap.c |  42 ++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 40 insertions(+), 2 deletions(-)

diffs (77 lines):

diff -r 525536161967 -r bbd42c34d05f tests/lib/libc/sys/t_mmap.c
--- a/tests/lib/libc/sys/t_mmap.c       Tue Mar 06 10:32:15 2012 +0000
+++ b/tests/lib/libc/sys/t_mmap.c       Tue Mar 06 11:02:55 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_mmap.c,v 1.2 2011/07/14 11:08:45 jruoho Exp $ */
+/* $NetBSD: t_mmap.c,v 1.3 2012/03/06 11:02:55 jruoho Exp $ */
 
 /*-
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
@@ -55,7 +55,7 @@
  * SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_mmap.c,v 1.2 2011/07/14 11:08:45 jruoho Exp $");
+__RCSID("$NetBSD: t_mmap.c,v 1.3 2012/03/06 11:02:55 jruoho Exp $");
 
 #include <sys/param.h>
 #include <sys/mman.h>
@@ -67,6 +67,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -152,6 +153,42 @@
        _exit(signo);
 }
 
+ATF_TC(mmap_block);
+ATF_TC_HEAD(mmap_block, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Test mmap(2) with a block device");
+}
+
+ATF_TC_BODY(mmap_block, tc)
+{
+       static const char *dev[] = { "/dev/wd0c", "/dev/wd0d", "/dev/wd0g" };
+       char *map;
+       size_t i;
+       int fd;
+
+       atf_tc_skip("The test case causes a panic (PR kern/38889)");
+
+       for (i = 0; i < __arraycount(dev); i++) {
+
+               if ((fd = open(dev[i], O_RDONLY)) >= 0) {
+                       (void)fprintf(stderr, "using %s\n", dev[i]);
+                       break;
+               }
+       }
+
+       if (i == __arraycount(dev))     /* Skip. */
+               return;
+
+       map = mmap(NULL, 4096, PROT_READ, MAP_FILE, fd, 0);
+       ATF_REQUIRE(map != MAP_FAILED);
+
+       (void)fprintf(stderr, "first byte %x\n", *map);
+       ATF_REQUIRE(close(fd) == 0);
+       (void)fprintf(stderr, "first byte %x\n", *map);
+
+       ATF_REQUIRE(munmap(map, 4096) == 0);
+}
+
 ATF_TC(mmap_err);
 ATF_TC_HEAD(mmap_err, tc)
 {
@@ -444,6 +481,7 @@
        page = sysconf(_SC_PAGESIZE);
        ATF_REQUIRE(page >= 0);
 
+       ATF_TP_ADD_TC(tp, mmap_block);
        ATF_TP_ADD_TC(tp, mmap_err);
        ATF_TP_ADD_TC(tp, mmap_loan);
        ATF_TP_ADD_TC(tp, mmap_prot_1);