Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 161 insertions, 0 deletions

diff --git a/REORG.TODO/malloc/tst-realloc.c b/REORG.TODO/malloc/tst-realloc.c
new file mode 100644
index 0000000000..31a58bd026
--- /dev/null
+++ b/REORG.TODO/malloc/tst-realloc.c
@@ -0,0 +1,161 @@
+/* Copyright (C) 2013-2017 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <malloc.h>
+#include <stdio.h>
+#include <string.h>
+#include <libc-diag.h>
+
+static int errors = 0;
+
+static void
+merror (const char *msg)
+{
+  ++errors;
+  printf ("Error: %s\n", msg);
+}
+
+static int
+do_test (void)
+{
+  void *p;
+  unsigned char *c;
+  int save, i, ok;
+
+  errno = 0;
+
+  /* realloc (NULL, ...) behaves similarly to malloc (C89).  */
+  DIAG_PUSH_NEEDS_COMMENT;
+#if __GNUC_PREREQ (7, 0)
+  /* GCC 7 warns about too-large allocations; here we want to test
+     that they fail.  */
+  DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
+#endif
+  p = realloc (NULL, -1);
+  DIAG_POP_NEEDS_COMMENT;
+  save = errno;
+
+  if (p != NULL)
+    merror ("realloc (NULL, -1) succeeded.");
+
+  /* errno should be set to ENOMEM on failure (POSIX).  */
+  if (p == NULL && save != ENOMEM)
+    merror ("errno is not set correctly");
+
+  errno = 0;
+
+  /* realloc (NULL, ...) behaves similarly to malloc (C89).  */
+  p = realloc (NULL, 10);
+  save = errno;
+
+  if (p == NULL)
+    merror ("realloc (NULL, 10) failed.");
+
+  /* errno should be clear on success (POSIX).  */
+  if (p != NULL && save != 0)
+    merror ("errno is set but should not be");
+
+  free (p);
+
+  p = calloc (20, 1);
+  if (p == NULL)
+    merror ("calloc (20, 1) failed.");
+
+  /* Check increasing size preserves contents (C89).  */
+  p = realloc (p, 200);
+  if (p == NULL)
+    merror ("realloc (p, 200) failed.");
+
+  c = p;
+  ok = 1;
+
+  for (i = 0; i < 20; i++)
+    {
+      if (c[i] != 0)
+        ok = 0;
+    }
+
+  if (ok == 0)
+    merror ("first 20 bytes were not cleared");
+
+  free (p);
+
+  p = realloc (NULL, 100);
+  if (p == NULL)
+    merror ("realloc (NULL, 100) failed.");
+
+  memset (p, 0xff, 100);
+
+  /* Check decreasing size preserves contents (C89).  */
+  p = realloc (p, 16);
+  if (p == NULL)
+    merror ("realloc (p, 16) failed.");
+
+  c = p;
+  ok = 1;
+
+  for (i = 0; i < 16; i++)
+    {
+      if (c[i] != 0xff)
+        ok = 0;
+    }
+
+  if (ok == 0)
+    merror ("first 16 bytes were not correct");
+
+  /* Check failed realloc leaves original untouched (C89).  */
+  DIAG_PUSH_NEEDS_COMMENT;
+#if __GNUC_PREREQ (7, 0)
+  /* GCC 7 warns about too-large allocations; here we want to test
+     that they fail.  */
+  DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
+#endif
+  c = realloc (p, -1);
+  DIAG_POP_NEEDS_COMMENT;
+  if (c != NULL)
+    merror ("realloc (p, -1) succeeded.");
+
+  c = p;
+  ok = 1;
+
+  for (i = 0; i < 16; i++)
+    {
+      if (c[i] != 0xff)
+        ok = 0;
+    }
+
+  if (ok == 0)
+    merror ("first 16 bytes were not correct after failed realloc");
+
+  /* realloc (p, 0) frees p (C89) and returns NULL (glibc).  */
+  p = realloc (p, 0);
+  if (p != NULL)
+    merror ("realloc (p, 0) returned non-NULL.");
+
+  /* realloc (NULL, 0) acts like malloc (0) (glibc).  */
+  p = realloc (NULL, 0);
+  if (p == NULL)
+    merror ("realloc (NULL, 0) returned NULL.");
+
+  free (p);
+
+  return errors != 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"