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From: Raoni Fassina Firmino <raoni@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/ibm/2.32/master] x86: Add string/memory function tests in RTM region
Date: Fri, 1 Apr 2022 20:06:09 +0000 (GMT) [thread overview]
Message-ID: <20220401200609.60E793888C45@sourceware.org> (raw)
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c42821ec053da5d42868dd49f91f335bc3a331f5
commit c42821ec053da5d42868dd49f91f335bc3a331f5
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Feb 23 06:33:10 2021 -0800
x86: Add string/memory function tests in RTM region
At function exit, AVX optimized string/memory functions have VZEROUPPER
which triggers RTM abort. When such functions are called inside a
transactionally executing RTM region, RTM abort causes severe performance
degradation. Add tests to verify that string/memory functions won't
cause RTM abort in RTM region.
(cherry picked from commit 4bd660be40967cd69072f69ebc2ad32bfcc1f206)
Diff:
---
sysdeps/x86/Makefile | 23 ++++++++++++++
sysdeps/x86/tst-memchr-rtm.c | 54 ++++++++++++++++++++++++++++++++
sysdeps/x86/tst-memcmp-rtm.c | 52 +++++++++++++++++++++++++++++++
sysdeps/x86/tst-memmove-rtm.c | 53 +++++++++++++++++++++++++++++++
sysdeps/x86/tst-memrchr-rtm.c | 54 ++++++++++++++++++++++++++++++++
sysdeps/x86/tst-memset-rtm.c | 45 +++++++++++++++++++++++++++
sysdeps/x86/tst-strchr-rtm.c | 54 ++++++++++++++++++++++++++++++++
sysdeps/x86/tst-strcpy-rtm.c | 53 +++++++++++++++++++++++++++++++
sysdeps/x86/tst-string-rtm.h | 72 +++++++++++++++++++++++++++++++++++++++++++
sysdeps/x86/tst-strlen-rtm.c | 53 +++++++++++++++++++++++++++++++
sysdeps/x86/tst-strncmp-rtm.c | 52 +++++++++++++++++++++++++++++++
sysdeps/x86/tst-strrchr-rtm.c | 53 +++++++++++++++++++++++++++++++
12 files changed, 618 insertions(+)
diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
index 9736a13e7b..e821d95fa3 100644
--- a/sysdeps/x86/Makefile
+++ b/sysdeps/x86/Makefile
@@ -22,6 +22,29 @@ endif
ifeq ($(subdir),string)
sysdep_routines += cacheinfo
+
+tests += \
+ tst-memchr-rtm \
+ tst-memcmp-rtm \
+ tst-memmove-rtm \
+ tst-memrchr-rtm \
+ tst-memset-rtm \
+ tst-strchr-rtm \
+ tst-strcpy-rtm \
+ tst-strlen-rtm \
+ tst-strncmp-rtm \
+ tst-strrchr-rtm
+
+CFLAGS-tst-memchr-rtm.c += -mrtm
+CFLAGS-tst-memcmp-rtm.c += -mrtm
+CFLAGS-tst-memmove-rtm.c += -mrtm
+CFLAGS-tst-memrchr-rtm.c += -mrtm
+CFLAGS-tst-memset-rtm.c += -mrtm
+CFLAGS-tst-strchr-rtm.c += -mrtm
+CFLAGS-tst-strcpy-rtm.c += -mrtm
+CFLAGS-tst-strlen-rtm.c += -mrtm
+CFLAGS-tst-strncmp-rtm.c += -mrtm
+CFLAGS-tst-strrchr-rtm.c += -mrtm
endif
ifneq ($(enable-cet),no)
diff --git a/sysdeps/x86/tst-memchr-rtm.c b/sysdeps/x86/tst-memchr-rtm.c
new file mode 100644
index 0000000000..e47494011e
--- /dev/null
+++ b/sysdeps/x86/tst-memchr-rtm.c
@@ -0,0 +1,54 @@
+/* Test case for memchr inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE);
+ string1[100] = 'c';
+ string1[STRING_SIZE - 100] = 'c';
+ char *p = memchr (string1, 'c', STRING_SIZE);
+ if (p == &string1[100])
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ char *p = memchr (string1, 'c', STRING_SIZE);
+ if (p == &string1[100])
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("memchr", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-memcmp-rtm.c b/sysdeps/x86/tst-memcmp-rtm.c
new file mode 100644
index 0000000000..e4c8a623bb
--- /dev/null
+++ b/sysdeps/x86/tst-memcmp-rtm.c
@@ -0,0 +1,52 @@
+/* Test case for memcmp inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+char string2[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE);
+ memset (string2, 'a', STRING_SIZE);
+ if (memcmp (string1, string2, STRING_SIZE) == 0)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ if (memcmp (string1, string2, STRING_SIZE) == 0)
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("memcmp", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-memmove-rtm.c b/sysdeps/x86/tst-memmove-rtm.c
new file mode 100644
index 0000000000..4bf97ef1e3
--- /dev/null
+++ b/sysdeps/x86/tst-memmove-rtm.c
@@ -0,0 +1,53 @@
+/* Test case for memmove inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+char string2[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE);
+ if (memmove (string2, string1, STRING_SIZE) == string2
+ && memcmp (string2, string1, STRING_SIZE) == 0)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ if (memmove (string2, string1, STRING_SIZE) == string2
+ && memcmp (string2, string1, STRING_SIZE) == 0)
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("memmove", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-memrchr-rtm.c b/sysdeps/x86/tst-memrchr-rtm.c
new file mode 100644
index 0000000000..a57a5a8eb9
--- /dev/null
+++ b/sysdeps/x86/tst-memrchr-rtm.c
@@ -0,0 +1,54 @@
+/* Test case for memrchr inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE);
+ string1[100] = 'c';
+ string1[STRING_SIZE - 100] = 'c';
+ char *p = memrchr (string1, 'c', STRING_SIZE);
+ if (p == &string1[STRING_SIZE - 100])
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ char *p = memrchr (string1, 'c', STRING_SIZE);
+ if (p == &string1[STRING_SIZE - 100])
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("memrchr", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-memset-rtm.c b/sysdeps/x86/tst-memset-rtm.c
new file mode 100644
index 0000000000..bf343a4dad
--- /dev/null
+++ b/sysdeps/x86/tst-memset-rtm.c
@@ -0,0 +1,45 @@
+/* Test case for memset inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE);
+ return EXIT_SUCCESS;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ memset (string1, 'a', STRING_SIZE);
+ return 0;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("memset", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-strchr-rtm.c b/sysdeps/x86/tst-strchr-rtm.c
new file mode 100644
index 0000000000..a82e29c072
--- /dev/null
+++ b/sysdeps/x86/tst-strchr-rtm.c
@@ -0,0 +1,54 @@
+/* Test case for strchr inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE - 1);
+ string1[100] = 'c';
+ string1[STRING_SIZE - 100] = 'c';
+ char *p = strchr (string1, 'c');
+ if (p == &string1[100])
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ char *p = strchr (string1, 'c');
+ if (p == &string1[100])
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("strchr", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-strcpy-rtm.c b/sysdeps/x86/tst-strcpy-rtm.c
new file mode 100644
index 0000000000..2b2a583fb4
--- /dev/null
+++ b/sysdeps/x86/tst-strcpy-rtm.c
@@ -0,0 +1,53 @@
+/* Test case for strcpy inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+char string2[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE - 1);
+ if (strcpy (string2, string1) == string2
+ && strcmp (string2, string1) == 0)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ if (strcpy (string2, string1) == string2
+ && strcmp (string2, string1) == 0)
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("strcpy", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-string-rtm.h b/sysdeps/x86/tst-string-rtm.h
new file mode 100644
index 0000000000..6ed9eca017
--- /dev/null
+++ b/sysdeps/x86/tst-string-rtm.h
@@ -0,0 +1,72 @@
+/* Test string function in a transactionally executing RTM region.
+ 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/>. */
+
+#include <string.h>
+#include <x86intrin.h>
+#include <cpu-features.h>
+#include <support/check.h>
+#include <support/test-driver.h>
+
+static int
+do_test_1 (const char *name, unsigned int loop, int (*prepare) (void),
+ int (*function) (void))
+{
+ if (!CPU_FEATURE_USABLE (RTM))
+ return EXIT_UNSUPPORTED;
+
+ int status = prepare ();
+ if (status != EXIT_SUCCESS)
+ return status;
+
+ unsigned int i;
+ unsigned int naborts = 0;
+ unsigned int failed = 0;
+ for (i = 0; i < loop; i++)
+ {
+ failed |= function ();
+ if (_xbegin() == _XBEGIN_STARTED)
+ {
+ failed |= function ();
+ _xend();
+ }
+ else
+ {
+ failed |= function ();
+ ++naborts;
+ }
+ }
+
+ if (failed)
+ FAIL_EXIT1 ("%s() failed", name);
+
+ if (naborts)
+ {
+ /* NB: Low single digit (<= 5%) noise-level aborts are normal for
+ TSX. */
+ double rate = 100 * ((double) naborts) / ((double) loop);
+ if (rate > 5)
+ FAIL_EXIT1 ("TSX abort rate: %.2f%% (%d out of %d)",
+ rate, naborts, loop);
+ }
+
+ return EXIT_SUCCESS;
+}
+
+static int do_test (void);
+
+#include <support/test-driver.c>
diff --git a/sysdeps/x86/tst-strlen-rtm.c b/sysdeps/x86/tst-strlen-rtm.c
new file mode 100644
index 0000000000..0dcf14db87
--- /dev/null
+++ b/sysdeps/x86/tst-strlen-rtm.c
@@ -0,0 +1,53 @@
+/* Test case for strlen inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE - 1);
+ string1[STRING_SIZE - 100] = '\0';
+ size_t len = strlen (string1);
+ if (len == STRING_SIZE - 100)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ size_t len = strlen (string1);
+ if (len == STRING_SIZE - 100)
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("strlen", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-strncmp-rtm.c b/sysdeps/x86/tst-strncmp-rtm.c
new file mode 100644
index 0000000000..236ad951b5
--- /dev/null
+++ b/sysdeps/x86/tst-strncmp-rtm.c
@@ -0,0 +1,52 @@
+/* Test case for strncmp inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+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)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ if (strncmp (string1, string2, STRING_SIZE) == 0)
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("strncmp", LOOP, prepare, function);
+}
diff --git a/sysdeps/x86/tst-strrchr-rtm.c b/sysdeps/x86/tst-strrchr-rtm.c
new file mode 100644
index 0000000000..e32bfaf5f5
--- /dev/null
+++ b/sysdeps/x86/tst-strrchr-rtm.c
@@ -0,0 +1,53 @@
+/* Test case for strrchr inside a transactionally executing RTM region.
+ 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/>. */
+
+#include <tst-string-rtm.h>
+
+#define LOOP 3000
+#define STRING_SIZE 1024
+char string1[STRING_SIZE];
+
+__attribute__ ((noinline, noclone))
+static int
+prepare (void)
+{
+ memset (string1, 'a', STRING_SIZE - 1);
+ string1[STRING_SIZE - 100] = 'c';
+ char *p = strrchr (string1, 'c');
+ if (p == &string1[STRING_SIZE - 100])
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+function (void)
+{
+ char *p = strrchr (string1, 'c');
+ if (p == &string1[STRING_SIZE - 100])
+ return 0;
+ else
+ return 1;
+}
+
+static int
+do_test (void)
+{
+ return do_test_1 ("strrchr", LOOP, prepare, function);
+}
reply other threads:[~2022-04-01 20:06 UTC|newest]
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