[src/trunk]: src/tests/lib/libc/sys add truncate causing signal test

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

details:   https://anonhg.NetBSD.org/src/rev/b23e7c3c73b9
branches:  trunk
changeset: 336374:b23e7c3c73b9
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Feb 27 16:09:19 2015 +0000

description:
add truncate causing signal test

diffstat:

 tests/lib/libc/sys/t_mmap.c |  59 +++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 57 insertions(+), 2 deletions(-)

diffs (87 lines):

diff -r 9d8e0f43a3c9 -r b23e7c3c73b9 tests/lib/libc/sys/t_mmap.c
--- a/tests/lib/libc/sys/t_mmap.c       Fri Feb 27 16:09:05 2015 +0000
+++ b/tests/lib/libc/sys/t_mmap.c       Fri Feb 27 16:09:19 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_mmap.c,v 1.7 2012/06/14 17:47:58 bouyer Exp $ */
+/* $NetBSD: t_mmap.c,v 1.8 2015/02/27 16:09:19 christos Exp $ */
 
 /*-
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
@@ -55,7 +55,7 @@
  * SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_mmap.c,v 1.7 2012/06/14 17:47:58 bouyer Exp $");
+__RCSID("$NetBSD: t_mmap.c,v 1.8 2015/02/27 16:09:19 christos Exp $");
 
 #include <sys/param.h>
 #include <sys/mman.h>
@@ -451,6 +451,60 @@
        (void)unlink(path);
 }
 
+ATF_TC_WITH_CLEANUP(mmap_truncate_signal);
+ATF_TC_HEAD(mmap_truncate_signal, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Test mmap(2) ftruncate(2) causing signal");
+}
+
+ATF_TC_BODY(mmap_truncate_signal, tc)
+{
+       char *map;
+       long i;
+       int fd, sta;
+       pid_t pid;
+
+       fd = open(path, O_RDWR | O_CREAT, 0700);
+
+       if (fd < 0)
+               return;
+
+       ATF_REQUIRE(write(fd, "foo\n", 5) == 5);
+
+       map = mmap(NULL, page, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0);
+       ATF_REQUIRE(map != MAP_FAILED);
+
+       sta = 0;
+       for (i = 0; i < 5; i++)
+               sta += map[i];
+       ATF_REQUIRE(sta == 334);
+
+       ATF_REQUIRE(ftruncate(fd, 0) == 0);
+       pid = fork();
+       ATF_REQUIRE(pid >= 0);
+
+       if (pid == 0) {
+               ATF_REQUIRE(signal(SIGBUS, map_sighandler) != SIG_ERR);
+               sta = 0;
+               for (i = 0; i < page; i++)
+                       sta += map[i];
+               ATF_REQUIRE(i == 0);
+       }
+
+       (void)wait(&sta);
+
+       ATF_REQUIRE(WIFEXITED(sta) != 0);
+       ATF_REQUIRE(WEXITSTATUS(sta) == SIGBUS);
+       ATF_REQUIRE(munmap(map, page) == 0);
+       ATF_REQUIRE(close(fd) == 0);
+}
+
+ATF_TC_CLEANUP(mmap_truncate_signal, tc)
+{
+       (void)unlink(path);
+}
+
 ATF_TC(mmap_va0);
 ATF_TC_HEAD(mmap_va0, tc)
 {
@@ -499,6 +553,7 @@
        ATF_TP_ADD_TC(tp, mmap_prot_2);
        ATF_TP_ADD_TC(tp, mmap_prot_3);
        ATF_TP_ADD_TC(tp, mmap_truncate);
+       ATF_TP_ADD_TC(tp, mmap_truncate_signal);
        ATF_TP_ADD_TC(tp, mmap_va0);
 
        return atf_no_error();