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authorH.J. Lu <hjl.tools@gmail.com>2021-07-08 16:13:17 -0400
committerNoah Goldstein <goldstein.w.n@gmail.com>2021-07-08 18:55:40 -0400
commita6e7c3745d73ff876b4ba6991fb00768a938aef5 (patch)
treef0525e9d7fc3a497c20d8abe6e2751dfc8708463
parent115d242456de158e698ffb0f9a5fee3118e9e825 (diff)
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x86-64: Test strlen and wcslen with 0 in the RSI register [BZ #28064]
commit 6f573a27b6c8b4236445810a44660612323f5a73 Author: Noah Goldstein <goldstein.w.n@gmail.com> Date: Wed Jun 23 01:19:34 2021 -0400 x86-64: Add wcslen optimize for sse4.1 added wcsnlen-sse4.1 to the wcslen ifunc implementation list. Since the random value in the the RSI register is larger than the wide-character string length in the existing wcslen test, it didn't trigger the wcslen test failure. Add a test to force 0 into the RSI register before calling wcslen.
-rw-r--r--sysdeps/x86_64/Makefile7
-rw-r--r--sysdeps/x86_64/tst-rsi-strlen.c81
-rw-r--r--sysdeps/x86_64/tst-rsi-wcslen.c20
3 files changed, 108 insertions, 0 deletions
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 06a444b6af..3fc03f4a19 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -20,6 +20,8 @@ endif
ifeq ($(subdir),string)
sysdep_routines += strcasecmp_l-nonascii strncase_l-nonascii
gen-as-const-headers += locale-defines.sym
+tests += \
+ tst-rsi-strlen
endif
ifeq ($(subdir),elf)
@@ -191,6 +193,11 @@ ifeq ($(subdir),csu)
gen-as-const-headers += tlsdesc.sym rtld-offsets.sym
endif
+ifeq ($(subdir),wcsmbs)
+tests += \
+ tst-rsi-wcslen
+endif
+
$(objpfx)x86_64/tst-x86_64mod-1.os: $(objpfx)tst-x86_64mod-1.os
$(make-target-directory)
rm -f $@
diff --git a/sysdeps/x86_64/tst-rsi-strlen.c b/sysdeps/x86_64/tst-rsi-strlen.c
new file mode 100644
index 0000000000..a80c4f85c2
--- /dev/null
+++ b/sysdeps/x86_64/tst-rsi-strlen.c
@@ -0,0 +1,81 @@
+/* Test strlen with 0 in the RSI register.
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifdef WIDE
+# define TEST_NAME "wcslen"
+#else
+# define TEST_NAME "strlen"
+#endif /* WIDE */
+
+#define TEST_MAIN
+#include <string/test-string.h>
+
+#ifdef WIDE
+# include <wchar.h>
+# define STRLEN wcslen
+# define CHAR wchar_t
+#else
+# define STRLEN strlen
+# define CHAR char
+#endif /* WIDE */
+
+IMPL (STRLEN, 1)
+
+typedef size_t (*proto_t) (const CHAR *);
+
+typedef struct
+{
+ void (*fn) (void);
+} parameter_t;
+
+size_t
+__attribute__ ((weak, noinline, noclone))
+do_strlen (parameter_t *a, int zero, const CHAR *str)
+{
+ return CALL (a, str);
+}
+
+static int
+test_main (void)
+{
+ test_init ();
+
+ size_t size = page_size / sizeof (CHAR) - 1;
+ CHAR *buf = (CHAR *) buf2;
+ buf[size] = 0;
+
+ parameter_t a;
+
+ int ret = 0;
+ FOR_EACH_IMPL (impl, 0)
+ {
+ a.fn = impl->fn;
+ /* NB: Pass 0 in RSI. */
+ size_t res = do_strlen (&a, 0, buf);
+ if (res != size)
+ {
+ error (0, 0, "Wrong result in function %s: %zu != %zu",
+ impl->name, res, size);
+ ret = 1;
+ }
+ }
+
+ return ret ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/x86_64/tst-rsi-wcslen.c b/sysdeps/x86_64/tst-rsi-wcslen.c
new file mode 100644
index 0000000000..f45a7dfb51
--- /dev/null
+++ b/sysdeps/x86_64/tst-rsi-wcslen.c
@@ -0,0 +1,20 @@
+/* Test wcslen with 0 in the RSI register.
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#define WIDE 1
+#include "tst-rsi-strlen.c"