[src/trunk]: src/tests/lib/libc/stdio add a test to verify that snprintf floa...

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

details:   https://anonhg.NetBSD.org/src/rev/86f9f3ac0ccb
branches:  trunk
changeset: 777636:86f9f3ac0ccb
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Feb 26 23:14:26 2012 +0000

description:
add a test to verify that snprintf float does not leak.

diffstat:

 tests/lib/libc/stdio/t_printf.c |  43 +++++++++++++++++++++++++++++++++++++++-
 1 files changed, 41 insertions(+), 2 deletions(-)

diffs (79 lines):

diff -r b2aa3ca36470 -r 86f9f3ac0ccb tests/lib/libc/stdio/t_printf.c
--- a/tests/lib/libc/stdio/t_printf.c   Sun Feb 26 22:04:42 2012 +0000
+++ b/tests/lib/libc/stdio/t_printf.c   Sun Feb 26 23:14:26 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_printf.c,v 1.3 2012/02/17 20:17:38 christos Exp $ */
+/* $NetBSD: t_printf.c,v 1.4 2012/02/26 23:14:26 christos Exp $ */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -26,11 +26,15 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <sys/types.h>
+#include <sys/resource.h>
 #include <atf-c.h>
 #include <math.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
+#include <time.h>
+#include <stdlib.h>
 
 ATF_TC(snprintf_dotzero);
 ATF_TC_HEAD(snprintf_dotzero, tc)
@@ -96,10 +100,44 @@
        ATF_CHECK(snprintf(s, sizeof(s), fmt, -23) == -1);
 }
 
+ATF_TC(snprintf_float);
+ATF_TC_HEAD(snprintf_float, tc)
+{
+
+       atf_tc_set_md_var(tc, "descr", "test that floating conversions don't"
+           " leak memory");
+}
+
+ATF_TC_BODY(snprintf_float, tc)
+{
+       union {
+               double d;
+               uint64_t bits;
+       } u;
+       uint32_t ul, uh;
+       time_t now;
+       char buf[1000];
+       struct rlimit rl;
+
+       rl.rlim_cur = rl.rlim_max = 1 * 1024 * 1024;
+       ATF_CHECK(setrlimit(RLIMIT_AS, &rl) != -1);
+       rl.rlim_cur = rl.rlim_max = 1 * 1024 * 1024;
+       ATF_CHECK(setrlimit(RLIMIT_DATA, &rl) != -1);
+
+       time(&now);
+       srand(now);
+       for (size_t i = 0; i < 1000000; i++) {
+               ul = rand();
+               uh = rand();
+               u.bits = (uint64_t)uh << 32 | ul;
+               ATF_CHECK(snprintf(buf, sizeof buf, " %.2f", u.d) != -1);
+       }
+}
+
 ATF_TC(sprintf_zeropad);
 ATF_TC_HEAD(sprintf_zeropad, tc)
 {
-
+ 
        atf_tc_set_md_var(tc, "descr", "output format zero padding");
 }
 
@@ -127,6 +165,7 @@
        ATF_TP_ADD_TC(tp, snprintf_posarg);
        ATF_TP_ADD_TC(tp, snprintf_posarg_width);
        ATF_TP_ADD_TC(tp, snprintf_posarg_error);
+       ATF_TP_ADD_TC(tp, snprintf_float);
        ATF_TP_ADD_TC(tp, sprintf_zeropad);
 
        return atf_no_error();