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authoralnsn <alnsn@NetBSD.org>2012-05-15 18:46:20 +0000
committeralnsn <alnsn@NetBSD.org>2012-05-15 18:46:20 +0000
commit80efc48df413c11244dd72256e31a3e6e0ed14ca (patch)
treebbfd66827357ad91642eb4fea8cbe01fb528916f /tests/lib/libc/stdlib
parent181506f0a9d95baadd48717719ac3dc754f989cf (diff)
Test a bug found by Geza Herman.
Diffstat (limited to 'tests/lib/libc/stdlib')
-rw-r--r--tests/lib/libc/stdlib/t_strtod.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/tests/lib/libc/stdlib/t_strtod.c b/tests/lib/libc/stdlib/t_strtod.c
index 127e27a4cb8..b4cad56eba8 100644
--- a/tests/lib/libc/stdlib/t_strtod.c
+++ b/tests/lib/libc/stdlib/t_strtod.c
@@ -1,4 +1,4 @@
-/* $NetBSD: t_strtod.c,v 1.29 2012/04/04 10:52:59 joerg Exp $ */
+/* $NetBSD: t_strtod.c,v 1.30 2012/05/15 18:46:20 alnsn Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
/* Public domain, Otto Moerbeek <otto@drijf.net>, 2006. */
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_strtod.c,v 1.29 2012/04/04 10:52:59 joerg Exp $");
+__RCSID("$NetBSD: t_strtod.c,v 1.30 2012/05/15 18:46:20 alnsn Exp $");
#include <errno.h>
#include <math.h>
@@ -298,6 +298,29 @@ ATF_TC_BODY(strtod_underflow, tc)
atf_tc_fail("strtod(3) did not detect underflow");
}
+/*
+ * Bug found by Geza Herman.
+ * See
+ * http://www.exploringbinary.com/a-bug-in-the-bigcomp-function-of-david-gays-strtod/
+ */
+ATF_TC(strtod_gherman_bug);
+ATF_TC_HEAD(strtod_gherman_bug, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test a bug found by Geza Herman");
+}
+
+ATF_TC_BODY(strtod_gherman_bug, tc)
+{
+
+ const char *str =
+ "1.8254370818746402660437411213933955878019332885742187";
+
+ errno = 0;
+ volatile double d = strtod(str, NULL);
+
+ ATF_CHECK(d == 0x1.d34fd8378ea83p+0);
+}
+
ATF_TP_ADD_TCS(tp)
{
@@ -311,6 +334,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, strtold_nan);
ATF_TP_ADD_TC(tp, strtod_round);
ATF_TP_ADD_TC(tp, strtod_underflow);
+ ATF_TP_ADD_TC(tp, strtod_gherman_bug);
return atf_no_error();
}