Add performance tests for strstr and strcasestr.

5 files changed, 399 insertions, 6 deletions

diff --git a/string/Makefile b/string/Makefile
index db9b5081d5..0267ea169b 100644
--- a/string/Makefile
+++ b/string/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1991-2002, 2005-2008, 2009 Free Software Foundation, Inc.
+# Copyright (C) 1991-2002, 2005-2008, 2009, 2010 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
@@ -36,7 +36,7 @@ routines	:= strcat strchr strcmp strcoll strcpy strcspn		\
 		   memccpy memcpy wordcopy strsep strcasestr		\
 		   swab strfry memfrob memmem rawmemchr strchrnul	\
 		   $(addprefix argz-,append count create ctsep next	\
-			             delete extract insert stringify	\
+				     delete extract insert stringify	\
 				     addsep replace)			\
 		   envz basename					\
 		   strcoll_l strxfrm_l string-inlines memrchr		\
@@ -48,7 +48,8 @@ o-objects.ob	:= memcpy.o memset.o memchr.o
 
 strop-tests	:= memchr memcmp memcpy memmove mempcpy memset memccpy	\
 		   stpcpy stpncpy strcat strchr strcmp strcpy strcspn	\
-		   strlen strncmp strncpy strpbrk strrchr strspn memmem
+		   strlen strncmp strncpy strpbrk strrchr strspn memmem	\
+		   strstr strcasestr
 tests		:= tester inl-tester noinl-tester testcopy test-ffs	\
 		   tst-strlen stratcliff tst-svc tst-inlcall		\
 		   bug-strncat1 bug-strspn1 bug-strpbrk1 tst-bswap	\
diff --git a/string/str-two-way.h b/string/str-two-way.h
index 87ed8a0366..502af47046 100644
--- a/string/str-two-way.h
+++ b/string/str-two-way.h
@@ -1,5 +1,5 @@
 /* Byte-wise substring search, using the Two-Way algorithm.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008, 2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Written by Eric Blake <ebb9@byu.net>, 2008.
 
@@ -426,5 +426,4 @@ two_way_long_needle (const unsigned char *haystack, size_t haystack_len,
 #undef AVAILABLE
 #undef CANON_ELEMENT
 #undef CMP_FUNC
-#undef MAX
 #undef RETURN_TYPE
diff --git a/string/strcasestr.c b/string/strcasestr.c
index 088b5d91c7..f0b2fa55bd 100644
--- a/string/strcasestr.c
+++ b/string/strcasestr.c
@@ -1,5 +1,5 @@
 /* Return the offset of one string within another.
-   Copyright (C) 1994, 1996-2000, 2004, 2008, 2009
+   Copyright (C) 1994, 1996-2000, 2004, 2008, 2009, 2010
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -103,4 +103,6 @@ STRCASESTR (const char *haystack_start, const char *needle_start)
 
 #undef LONG_NEEDLE_THRESHOLD
 
+#ifndef NO_ALIAS
 weak_alias (__strcasestr, strcasestr)
+#endif
diff --git a/string/test-strcasestr.c b/string/test-strcasestr.c
new file mode 100644
index 0000000000..547537cbd4
--- /dev/null
+++ b/string/test-strcasestr.c
@@ -0,0 +1,197 @@
+/* Test and measure strcasestr functions.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2010.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#define TEST_MAIN
+#include "test-string.h"
+
+
+#define STRCASESTR simple_strcasestr
+#define NO_ALIAS
+#define __strncasecmp strncasecmp
+#include "strcasestr.c"
+
+
+static char *
+stupid_strcasestr (const char *s1, const char *s2)
+{
+  ssize_t s1len = strlen (s1);
+  ssize_t s2len = strlen (s2);
+
+  if (s2len > s1len)
+    return NULL;
+
+  for (ssize_t i = 0; i <= s1len - s2len; ++i)
+    {
+      size_t j;
+      for (j = 0; j < s2len; ++j)
+	if (tolower (s1[i + j]) != tolower (s2[j]))
+	  break;
+      if (j == s2len)
+	return (char *) s1 + i;
+    }
+
+  return NULL;
+}
+
+
+typedef char *(*proto_t) (const char *, const char *);
+
+IMPL (stupid_strcasestr, 0)
+IMPL (simple_strcasestr, 0)
+IMPL (strcasestr, 1)
+
+
+static void
+do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
+{
+  char *result = CALL (impl, s1, s2);
+  if (result != exp_result)
+    {
+      error (0, 0, "Wrong result in function %s %s %s", impl->name,
+	     result, exp_result);
+      ret = 1;
+      return;
+    }
+
+  if (HP_TIMING_AVAIL)
+    {
+      hp_timing_t start __attribute ((unused));
+      hp_timing_t stop __attribute ((unused));
+      hp_timing_t best_time = ~(hp_timing_t) 0;
+      size_t i;
+
+      for (i = 0; i < 32; ++i)
+	{
+	  HP_TIMING_NOW (start);
+	  CALL (impl, s1, s2);
+	  HP_TIMING_NOW (stop);
+	  HP_TIMING_BEST (best_time, start, stop);
+	}
+
+      printf ("\t%zd", (size_t) best_time);
+    }
+}
+
+
+static void
+do_test (size_t align1, size_t align2, size_t len1, size_t len2,
+	 int fail)
+{
+  char *s1 = (char *) (buf1 + align1);
+  char *s2 = (char *) (buf2 + align2);
+
+  static const char d[] = "1234567890abcdef";
+#define dl (sizeof (d) - 1)
+  char *ss2 = s2;
+  for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
+    {
+      size_t t = l > dl ? dl : l;
+      ss2 = mempcpy (ss2, d, t);
+    }
+  s2[len2] = '\0';
+
+  if (fail)
+    {
+      char *ss1 = s1;
+      for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
+	{
+	  size_t t = l > dl ? dl : l;
+	  memcpy (ss1, d, t);
+	  ++ss1[len2 > 7 ? 7 : len2 - 1];
+	  ss1 += t;
+	}
+    }
+  else
+    {
+      memset (s1, '0', len1);
+      for (size_t i = 0; i < len2; ++i)
+	s1[len1 - len2 + i] = toupper (s2[i]);
+    }
+  s1[len1] = '\0';
+
+  if (HP_TIMING_AVAIL)
+    printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
+	    len1, len2, align1, align2, fail ? "fail" : "found");
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
+
+  if (HP_TIMING_AVAIL)
+    putchar ('\n');
+}
+
+
+static int
+test_main (void)
+{
+  test_init ();
+
+  printf ("%23s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+  for (size_t klen = 2; klen < 32; ++klen)
+    for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
+      {
+	do_test (0, 0, hlen, klen, 0);
+	do_test (0, 0, hlen, klen, 1);
+	do_test (0, 3, hlen, klen, 0);
+	do_test (0, 3, hlen, klen, 1);
+	do_test (0, 9, hlen, klen, 0);
+	do_test (0, 9, hlen, klen, 1);
+	do_test (0, 15, hlen, klen, 0);
+	do_test (0, 15, hlen, klen, 1);
+
+	do_test (3, 0, hlen, klen, 0);
+	do_test (3, 0, hlen, klen, 1);
+	do_test (3, 3, hlen, klen, 0);
+	do_test (3, 3, hlen, klen, 1);
+	do_test (3, 9, hlen, klen, 0);
+	do_test (3, 9, hlen, klen, 1);
+	do_test (3, 15, hlen, klen, 0);
+	do_test (3, 15, hlen, klen, 1);
+
+	do_test (9, 0, hlen, klen, 0);
+	do_test (9, 0, hlen, klen, 1);
+	do_test (9, 3, hlen, klen, 0);
+	do_test (9, 3, hlen, klen, 1);
+	do_test (9, 9, hlen, klen, 0);
+	do_test (9, 9, hlen, klen, 1);
+	do_test (9, 15, hlen, klen, 0);
+	do_test (9, 15, hlen, klen, 1);
+
+	do_test (15, 0, hlen, klen, 0);
+	do_test (15, 0, hlen, klen, 1);
+	do_test (15, 3, hlen, klen, 0);
+	do_test (15, 3, hlen, klen, 1);
+	do_test (15, 9, hlen, klen, 0);
+	do_test (15, 9, hlen, klen, 1);
+	do_test (15, 15, hlen, klen, 0);
+	do_test (15, 15, hlen, klen, 1);
+      }
+
+  do_test (0, 0, page_size - 1, 16, 0);
+  do_test (0, 0, page_size - 1, 16, 1);
+
+  return ret;
+}
+
+#include "../test-skeleton.c"
diff --git a/string/test-strstr.c b/string/test-strstr.c
new file mode 100644
index 0000000000..c1da68663a
--- /dev/null
+++ b/string/test-strstr.c
@@ -0,0 +1,194 @@
+/* Test and measure strstr functions.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2010.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#define TEST_MAIN
+#include "test-string.h"
+
+
+#define STRSTR simple_strstr
+#include "strstr.c"
+
+
+static char *
+stupid_strstr (const char *s1, const char *s2)
+{
+  ssize_t s1len = strlen (s1);
+  ssize_t s2len = strlen (s2);
+
+  if (s2len > s1len)
+    return NULL;
+
+  for (ssize_t i = 0; i <= s1len - s2len; ++i)
+    {
+      size_t j;
+      for (j = 0; j < s2len; ++j)
+	if (s1[i + j] != s2[j])
+	  break;
+      if (j == s2len)
+	return (char *) s1 + i;
+    }
+
+  return NULL;
+}
+
+
+typedef char *(*proto_t) (const char *, const char *);
+
+IMPL (stupid_strstr, 0)
+IMPL (simple_strstr, 0)
+IMPL (strstr, 1)
+
+
+static void
+do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
+{
+  char *result = CALL (impl, s1, s2);
+  if (result != exp_result)
+    {
+      error (0, 0, "Wrong result in function %s %s %s", impl->name,
+	     result, exp_result);
+      ret = 1;
+      return;
+    }
+
+  if (HP_TIMING_AVAIL)
+    {
+      hp_timing_t start __attribute ((unused));
+      hp_timing_t stop __attribute ((unused));
+      hp_timing_t best_time = ~(hp_timing_t) 0;
+      size_t i;
+
+      for (i = 0; i < 32; ++i)
+	{
+	  HP_TIMING_NOW (start);
+	  CALL (impl, s1, s2);
+	  HP_TIMING_NOW (stop);
+	  HP_TIMING_BEST (best_time, start, stop);
+	}
+
+      printf ("\t%zd", (size_t) best_time);
+    }
+}
+
+
+static void
+do_test (size_t align1, size_t align2, size_t len1, size_t len2,
+	 int fail)
+{
+  char *s1 = (char *) (buf1 + align1);
+  char *s2 = (char *) (buf2 + align2);
+
+  static const char d[] = "1234567890abcdef";
+#define dl (sizeof (d) - 1)
+  char *ss2 = s2;
+  for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
+    {
+      size_t t = l > dl ? dl : l;
+      ss2 = mempcpy (ss2, d, t);
+    }
+  s2[len2] = '\0';
+
+  if (fail)
+    {
+      char *ss1 = s1;
+      for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
+	{
+	  size_t t = l > dl ? dl : l;
+	  memcpy (ss1, d, t);
+	  ++ss1[len2 > 7 ? 7 : len2 - 1];
+	  ss1 += t;
+	}
+    }
+  else
+    {
+      memset (s1, '0', len1);
+      memcpy (s1 + len1 - len2, s2, len2);
+    }
+  s1[len1] = '\0';
+
+  if (HP_TIMING_AVAIL)
+    printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
+	    len1, len2, align1, align2, fail ? "fail" : "found");
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
+
+  if (HP_TIMING_AVAIL)
+    putchar ('\n');
+}
+
+
+static int
+test_main (void)
+{
+  test_init ();
+
+  printf ("%23s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+  for (size_t klen = 2; klen < 32; ++klen)
+    for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
+      {
+	do_test (0, 0, hlen, klen, 0);
+	do_test (0, 0, hlen, klen, 1);
+	do_test (0, 3, hlen, klen, 0);
+	do_test (0, 3, hlen, klen, 1);
+	do_test (0, 9, hlen, klen, 0);
+	do_test (0, 9, hlen, klen, 1);
+	do_test (0, 15, hlen, klen, 0);
+	do_test (0, 15, hlen, klen, 1);
+
+	do_test (3, 0, hlen, klen, 0);
+	do_test (3, 0, hlen, klen, 1);
+	do_test (3, 3, hlen, klen, 0);
+	do_test (3, 3, hlen, klen, 1);
+	do_test (3, 9, hlen, klen, 0);
+	do_test (3, 9, hlen, klen, 1);
+	do_test (3, 15, hlen, klen, 0);
+	do_test (3, 15, hlen, klen, 1);
+
+	do_test (9, 0, hlen, klen, 0);
+	do_test (9, 0, hlen, klen, 1);
+	do_test (9, 3, hlen, klen, 0);
+	do_test (9, 3, hlen, klen, 1);
+	do_test (9, 9, hlen, klen, 0);
+	do_test (9, 9, hlen, klen, 1);
+	do_test (9, 15, hlen, klen, 0);
+	do_test (9, 15, hlen, klen, 1);
+
+	do_test (15, 0, hlen, klen, 0);
+	do_test (15, 0, hlen, klen, 1);
+	do_test (15, 3, hlen, klen, 0);
+	do_test (15, 3, hlen, klen, 1);
+	do_test (15, 9, hlen, klen, 0);
+	do_test (15, 9, hlen, klen, 1);
+	do_test (15, 15, hlen, klen, 0);
+	do_test (15, 15, hlen, klen, 1);
+      }
+
+  do_test (0, 0, page_size - 1, 16, 0);
+  do_test (0, 0, page_size - 1, 16, 1);
+
+  return ret;
+}
+
+#include "../test-skeleton.c"