String: Split memcpy tests so that parallel build is faster

No bug.

This commit splits test-memcpy.c into test-memcpy.c and
test-memcpy-large.c. The idea is parallel builds will be able to run
both in parallel speeding up the process.

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

1 files changed, 168 insertions, 0 deletions

diff --git a/string/test-memcpy-support.h b/string/test-memcpy-support.h
new file mode 100644
index 0000000000..419158a420
--- /dev/null
+++ b/string/test-memcpy-support.h
@@ -0,0 +1,168 @@
+/* Support for testing and measuring memcpy functions.
+   Copyright (C) 1999-2021 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/>.  */
+
+/* This fail contains the actual memcpy test functions. It is included
+   in test-memcpy.c and test-memcpy-large.c.  They are split because
+   the tests take a long time to run and splitting them allows for
+   simpler parallel testing.  */
+
+#ifndef MEMCPY_RESULT
+#define MEMCPY_RESULT(dst, len) dst
+#define MIN_PAGE_SIZE 131072
+#define TEST_MAIN
+#define TEST_NAME "memcpy"
+#define TIMEOUT (8 * 60)
+#include "test-string.h"
+
+char *simple_memcpy (char *, const char *, size_t);
+char *builtin_memcpy (char *, const char *, size_t);
+
+IMPL (simple_memcpy, 0)
+IMPL (builtin_memcpy, 0)
+IMPL (memcpy, 1)
+char *
+simple_memcpy (char *dst, const char *src, size_t n)
+{
+  char *ret = dst;
+  while (n--)
+    *dst++ = *src++;
+  return ret;
+}
+
+char *
+builtin_memcpy (char *dst, const char *src, size_t n)
+{
+  return __builtin_memcpy (dst, src, n);
+}
+#endif
+typedef char *(*proto_t) (char *, const char *, size_t);
+
+static void
+do_one_test (impl_t *impl, char *dst, const char *src, size_t len)
+{
+  size_t i;
+
+  /* Must clear the destination buffer set by the previous run.  */
+  for (i = 0; i < len; i++)
+    dst[i] = 0;
+
+  if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len))
+    {
+      error (0, 0, "Wrong result in function %s %p %p", impl->name,
+             CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len));
+      ret = 1;
+      return;
+    }
+
+  if (memcmp (dst, src, len) != 0)
+    {
+      error (0, 0,
+             "Wrong result in function %s dst %p \"%.*s\" src %p \"%.*s\" len "
+             "%zu",
+             impl->name, dst, (int)len, dst, src, (int)len, src, len);
+      ret = 1;
+      return;
+    }
+}
+
+static void
+do_test (size_t align1, size_t align2, size_t len)
+{
+  size_t i, j, repeats;
+  char *s1, *s2;
+
+  align1 &= 4095;
+  if (align1 + len >= page_size)
+    return;
+
+  align2 &= 4095;
+  if (align2 + len >= page_size)
+    return;
+
+  s1 = (char *)(buf1 + align1);
+  s2 = (char *)(buf2 + align2);
+  for (repeats = 0; repeats < 2; ++repeats)
+    {
+      for (i = 0, j = 1; i < len; i++, j += 23)
+        s1[i] = j;
+
+      FOR_EACH_IMPL (impl, 0)
+      do_one_test (impl, s2, s1, len);
+    }
+}
+
+static void
+do_test1 (size_t align1, size_t align2, size_t size)
+{
+  void *large_buf;
+  size_t mmap_size, region_size;
+
+  align1 &= (page_size - 1);
+  if (align1 == 0)
+    align1 = page_size;
+
+  align2 &= (page_size - 1);
+  if (align2 == 0)
+    align2 = page_size;
+
+  region_size = (size + page_size - 1) & (~(page_size - 1));
+
+  mmap_size = region_size * 2 + 3 * page_size;
+  large_buf = mmap (NULL, mmap_size, PROT_READ | PROT_WRITE,
+                    MAP_PRIVATE | MAP_ANON, -1, 0);
+  if (large_buf == MAP_FAILED)
+    {
+      puts ("Failed to allocate large_buf, skipping do_test");
+      return;
+    }
+  if (mprotect (large_buf + region_size + page_size, page_size, PROT_NONE))
+    error (EXIT_FAILURE, errno, "mprotect failed");
+
+  size_t array_size = size / sizeof (uint32_t);
+  uint32_t *dest = large_buf + align1;
+  uint32_t *src = large_buf + region_size + 2 * page_size + align2;
+  size_t i;
+  size_t repeats;
+  for (repeats = 0; repeats < 2; repeats++)
+    {
+      for (i = 0; i < array_size; i++)
+        src[i] = (uint32_t)i;
+      FOR_EACH_IMPL (impl, 0)
+      {
+        memset (dest, -1, size);
+        CALL (impl, (char *)dest, (char *)src, size);
+        if (memcmp (src, dest, size))
+          {
+            for (i = 0; i < array_size; i++)
+              if (dest[i] != src[i])
+                {
+                  error (0, 0,
+                         "Wrong result in function %s dst \"%p\" src \"%p\" "
+                         "offset \"%zd\"",
+                         impl->name, dest, src, i);
+                  ret = 1;
+                  munmap ((void *)large_buf, mmap_size);
+                  return;
+                }
+          }
+      }
+      dest = large_buf + region_size + 2 * page_size + align1;
+      src = large_buf + align2;
+    }
+  munmap ((void *)large_buf, mmap_size);
+}