You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
147 lines
4.5 KiB
147 lines
4.5 KiB
From 7835d611af0854e69a0c71e3806f8fe379282d6f Mon Sep 17 00:00:00 2001
|
|
From: Noah Goldstein <goldstein.w.n@gmail.com>
|
|
Date: Fri, 18 Feb 2022 14:19:15 -0600
|
|
Subject: [PATCH] x86: Test wcscmp RTM in the wcsncmp overflow case [BZ #28896]
|
|
Content-type: text/plain; charset=UTF-8
|
|
|
|
In the overflow fallback strncmp-avx2-rtm and wcsncmp-avx2-rtm would
|
|
call strcmp-avx2 and wcscmp-avx2 respectively. This would have
|
|
not checks around vzeroupper and would trigger spurious
|
|
aborts. This commit fixes that.
|
|
|
|
test-strcmp, test-strncmp, test-wcscmp, and test-wcsncmp all pass on
|
|
AVX2 machines with and without RTM.
|
|
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
|
|
---
|
|
sysdeps/x86/Makefile | 5 ++++-
|
|
sysdeps/x86/tst-strncmp-rtm.c | 32 +++++++++++++++++++++++---------
|
|
sysdeps/x86/tst-wcsncmp-rtm.c | 21 +++++++++++++++++++++
|
|
3 files changed, 48 insertions(+), 10 deletions(-)
|
|
create mode 100644 sysdeps/x86/tst-wcsncmp-rtm.c
|
|
|
|
diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
|
|
index 2d814915..c2111f49 100644
|
|
--- a/sysdeps/x86/Makefile
|
|
+++ b/sysdeps/x86/Makefile
|
|
@@ -28,7 +28,9 @@ tests += \
|
|
tst-strcpy-rtm \
|
|
tst-strlen-rtm \
|
|
tst-strncmp-rtm \
|
|
- tst-strrchr-rtm
|
|
+ tst-strrchr-rtm \
|
|
+ tst-wcsncmp-rtm \
|
|
+# tests
|
|
|
|
CFLAGS-tst-memchr-rtm.c += -mrtm
|
|
CFLAGS-tst-memcmp-rtm.c += -mrtm
|
|
@@ -40,6 +42,7 @@ CFLAGS-tst-strcpy-rtm.c += -mrtm
|
|
CFLAGS-tst-strlen-rtm.c += -mrtm
|
|
CFLAGS-tst-strncmp-rtm.c += -mrtm -Wno-error
|
|
CFLAGS-tst-strrchr-rtm.c += -mrtm
|
|
+CFLAGS-tst-wcsncmp-rtm.c += -mrtm -Wno-error
|
|
endif
|
|
|
|
ifneq ($(enable-cet),no)
|
|
diff --git a/sysdeps/x86/tst-strncmp-rtm.c b/sysdeps/x86/tst-strncmp-rtm.c
|
|
index 4d0004b5..4e9f094f 100644
|
|
--- a/sysdeps/x86/tst-strncmp-rtm.c
|
|
+++ b/sysdeps/x86/tst-strncmp-rtm.c
|
|
@@ -19,18 +19,32 @@
|
|
#include <stdint.h>
|
|
#include <tst-string-rtm.h>
|
|
|
|
+#ifdef WIDE
|
|
+# define CHAR wchar_t
|
|
+# define MEMSET wmemset
|
|
+# define STRNCMP wcsncmp
|
|
+# define TEST_NAME wcsncmp
|
|
+#else /* !WIDE */
|
|
+# define CHAR char
|
|
+# define MEMSET memset
|
|
+# define STRNCMP strncmp
|
|
+# define TEST_NAME strncmp
|
|
+#endif /* !WIDE */
|
|
+
|
|
+
|
|
+
|
|
#define LOOP 3000
|
|
#define STRING_SIZE 1024
|
|
-char string1[STRING_SIZE];
|
|
-char string2[STRING_SIZE];
|
|
+CHAR string1[STRING_SIZE];
|
|
+CHAR string2[STRING_SIZE];
|
|
|
|
__attribute__ ((noinline, noclone))
|
|
static int
|
|
prepare (void)
|
|
{
|
|
- memset (string1, 'a', STRING_SIZE - 1);
|
|
- memset (string2, 'a', STRING_SIZE - 1);
|
|
- if (strncmp (string1, string2, STRING_SIZE) == 0)
|
|
+ MEMSET (string1, 'a', STRING_SIZE - 1);
|
|
+ MEMSET (string2, 'a', STRING_SIZE - 1);
|
|
+ if (STRNCMP (string1, string2, STRING_SIZE) == 0)
|
|
return EXIT_SUCCESS;
|
|
else
|
|
return EXIT_FAILURE;
|
|
@@ -40,7 +54,7 @@ __attribute__ ((noinline, noclone))
|
|
static int
|
|
function (void)
|
|
{
|
|
- if (strncmp (string1, string2, STRING_SIZE) == 0)
|
|
+ if (STRNCMP (string1, string2, STRING_SIZE) == 0)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
@@ -50,7 +64,7 @@ __attribute__ ((noinline, noclone))
|
|
static int
|
|
function_overflow (void)
|
|
{
|
|
- if (strncmp (string1, string2, SIZE_MAX) == 0)
|
|
+ if (STRNCMP (string1, string2, SIZE_MAX) == 0)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
@@ -59,9 +73,9 @@ function_overflow (void)
|
|
static int
|
|
do_test (void)
|
|
{
|
|
- int status = do_test_1 ("strncmp", LOOP, prepare, function);
|
|
+ int status = do_test_1 (TEST_NAME, LOOP, prepare, function);
|
|
if (status != EXIT_SUCCESS)
|
|
return status;
|
|
- status = do_test_1 ("strncmp", LOOP, prepare, function_overflow);
|
|
+ status = do_test_1 (TEST_NAME, LOOP, prepare, function_overflow);
|
|
return status;
|
|
}
|
|
diff --git a/sysdeps/x86/tst-wcsncmp-rtm.c b/sysdeps/x86/tst-wcsncmp-rtm.c
|
|
new file mode 100644
|
|
index 00000000..bad3b863
|
|
--- /dev/null
|
|
+++ b/sysdeps/x86/tst-wcsncmp-rtm.c
|
|
@@ -0,0 +1,21 @@
|
|
+/* Test case for wcsncmp inside a transactionally executing RTM region.
|
|
+ Copyright (C) 2022 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 <wchar.h>
|
|
+#include "tst-strncmp-rtm.c"
|
|
--
|
|
GitLab
|
|
|