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authorWill Newton <will.newton@linaro.org>2013-08-07 19:56:21 +0100
committerWill Newton <will.newton@linaro.org>2013-09-09 09:20:09 +0100
commit0c66b8e985649f89a84b26ba02740b23e1f4e091 (patch)
tree0a6d2457d61254898c4d55a5c3f12400257d6698 /malloc
parentf6b00fd1153295bc32041724a88aad84ba598b4a (diff)
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malloc: Add realloc test.
The current tests don't test the functionality of realloc in detail. Add a new test for realloc that exercises some of the corner cases that are not otherwise tested. ChangeLog: 2013-09-09 Will Newton <will.newton@linaro.org> * malloc/Makefile: Add tst-realloc to tests. * malloc/tst-realloc.c: New file.
Diffstat (limited to 'malloc')
-rw-r--r--malloc/Makefile3
-rw-r--r--malloc/tst-realloc.c146
2 files changed, 148 insertions, 1 deletions
diff --git a/malloc/Makefile b/malloc/Makefile
index 0fe31a4a02..b16dac8deb 100644
--- a/malloc/Makefile
+++ b/malloc/Makefile
@@ -25,7 +25,8 @@ all:
dist-headers := malloc.h
headers := $(dist-headers) obstack.h mcheck.h
tests := mallocbug tst-malloc tst-valloc tst-calloc tst-obstack \
- tst-mallocstate tst-mcheck tst-mallocfork tst-trim1 tst-malloc-usable
+ tst-mallocstate tst-mcheck tst-mallocfork tst-trim1 \
+ tst-malloc-usable tst-realloc
test-srcs = tst-mtrace
routines = malloc morecore mcheck mtrace obstack
diff --git a/malloc/tst-realloc.c b/malloc/tst-realloc.c
new file mode 100644
index 0000000000..9d290d24c0
--- /dev/null
+++ b/malloc/tst-realloc.c
@@ -0,0 +1,146 @@
+/* Copyright (C) 2013 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>
+
+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). */
+ p = realloc (NULL, -1);
+ 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). */
+ c = realloc (p, -1);
+ 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"