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139 lines
4.3 KiB
139 lines
4.3 KiB
commit d093b677c36ef4b360bf30483b68b95d9f0ad1d2 |
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Author: Noah Goldstein <goldstein.w.n@gmail.com> |
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Date: Fri Feb 18 14:19:15 2022 -0600 |
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x86: Test wcscmp RTM in the wcsncmp overflow case [BZ #28896] |
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In the overflow fallback strncmp-avx2-rtm and wcsncmp-avx2-rtm would |
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call strcmp-avx2 and wcscmp-avx2 respectively. This would have |
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not checks around vzeroupper and would trigger spurious |
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aborts. This commit fixes that. |
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test-strcmp, test-strncmp, test-wcscmp, and test-wcsncmp all pass on |
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AVX2 machines with and without RTM. |
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Reviewed-by: H.J. Lu <hjl.tools@gmail.com> |
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(cherry picked from commit 7835d611af0854e69a0c71e3806f8fe379282d6f) |
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diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile |
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index af934d6ccf1fa337..cd94e683afd5b4a4 100644 |
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--- a/sysdeps/x86/Makefile |
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+++ b/sysdeps/x86/Makefile |
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@@ -95,7 +95,9 @@ tests += \ |
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tst-strcpy-rtm \ |
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tst-strlen-rtm \ |
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tst-strncmp-rtm \ |
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- tst-strrchr-rtm |
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+ tst-strrchr-rtm \ |
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+ tst-wcsncmp-rtm \ |
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+# tests |
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CFLAGS-tst-memchr-rtm.c += -mrtm |
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CFLAGS-tst-memcmp-rtm.c += -mrtm |
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@@ -107,6 +109,7 @@ CFLAGS-tst-strcpy-rtm.c += -mrtm |
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CFLAGS-tst-strlen-rtm.c += -mrtm |
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CFLAGS-tst-strncmp-rtm.c += -mrtm -Wno-error |
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CFLAGS-tst-strrchr-rtm.c += -mrtm |
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+CFLAGS-tst-wcsncmp-rtm.c += -mrtm -Wno-error |
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endif |
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ifneq ($(enable-cet),no) |
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diff --git a/sysdeps/x86/tst-strncmp-rtm.c b/sysdeps/x86/tst-strncmp-rtm.c |
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index 4d0004b58aae428d..4e9f094f39c72f67 100644 |
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--- a/sysdeps/x86/tst-strncmp-rtm.c |
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+++ b/sysdeps/x86/tst-strncmp-rtm.c |
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@@ -19,18 +19,32 @@ |
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#include <stdint.h> |
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#include <tst-string-rtm.h> |
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+#ifdef WIDE |
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+# define CHAR wchar_t |
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+# define MEMSET wmemset |
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+# define STRNCMP wcsncmp |
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+# define TEST_NAME wcsncmp |
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+#else /* !WIDE */ |
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+# define CHAR char |
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+# define MEMSET memset |
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+# define STRNCMP strncmp |
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+# define TEST_NAME strncmp |
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+#endif /* !WIDE */ |
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+ |
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+ |
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+ |
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#define LOOP 3000 |
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#define STRING_SIZE 1024 |
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-char string1[STRING_SIZE]; |
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-char string2[STRING_SIZE]; |
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+CHAR string1[STRING_SIZE]; |
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+CHAR string2[STRING_SIZE]; |
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__attribute__ ((noinline, noclone)) |
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static int |
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prepare (void) |
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{ |
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- memset (string1, 'a', STRING_SIZE - 1); |
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- memset (string2, 'a', STRING_SIZE - 1); |
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- if (strncmp (string1, string2, STRING_SIZE) == 0) |
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+ MEMSET (string1, 'a', STRING_SIZE - 1); |
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+ MEMSET (string2, 'a', STRING_SIZE - 1); |
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+ if (STRNCMP (string1, string2, STRING_SIZE) == 0) |
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return EXIT_SUCCESS; |
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else |
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return EXIT_FAILURE; |
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@@ -40,7 +54,7 @@ __attribute__ ((noinline, noclone)) |
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static int |
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function (void) |
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{ |
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- if (strncmp (string1, string2, STRING_SIZE) == 0) |
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+ if (STRNCMP (string1, string2, STRING_SIZE) == 0) |
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return 0; |
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else |
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return 1; |
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@@ -50,7 +64,7 @@ __attribute__ ((noinline, noclone)) |
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static int |
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function_overflow (void) |
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{ |
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- if (strncmp (string1, string2, SIZE_MAX) == 0) |
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+ if (STRNCMP (string1, string2, SIZE_MAX) == 0) |
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return 0; |
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else |
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return 1; |
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@@ -59,9 +73,9 @@ function_overflow (void) |
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static int |
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do_test (void) |
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{ |
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- int status = do_test_1 ("strncmp", LOOP, prepare, function); |
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+ int status = do_test_1 (TEST_NAME, LOOP, prepare, function); |
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if (status != EXIT_SUCCESS) |
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return status; |
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- status = do_test_1 ("strncmp", LOOP, prepare, function_overflow); |
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+ status = do_test_1 (TEST_NAME, LOOP, prepare, function_overflow); |
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return status; |
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} |
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diff --git a/sysdeps/x86/tst-wcsncmp-rtm.c b/sysdeps/x86/tst-wcsncmp-rtm.c |
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new file mode 100644 |
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index 0000000000000000..bad3b863782c5e56 |
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--- /dev/null |
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+++ b/sysdeps/x86/tst-wcsncmp-rtm.c |
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@@ -0,0 +1,21 @@ |
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+/* Test case for wcsncmp inside a transactionally executing RTM region. |
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+ Copyright (C) 2022 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <https://www.gnu.org/licenses/>. */ |
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+ |
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+#define WIDE 1 |
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+#include <wchar.h> |
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+#include "tst-strncmp-rtm.c"
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