unit: Add test for misaligned builtin memcpy()

spec/build/testsuites/unit/unit-no-clock-0.yml

@@ -11,6 +11,7 @@ includes: []
 ldflags: []
 links: []
 source:
+- testsuites/unit/tc-misaligned-builtin-memcpy.c
 - testsuites/unit/ts-unit-no-clock-0.c
 stlib: []
 target: testsuites/unit/ts-unit-no-clock-0.exe

testsuites/unit/tc-misaligned-builtin-memcpy.c

@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2019 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+
+#include <rtems.h>
+
+#include <rtems/test.h>
+
+T_TEST_CASE(MisalignedBuiltinMemcpy)
+{
+	double a;
+	double b;
+	char buf[2 * sizeof(double)];
+	void *p;
+
+	p = &buf[0];
+	p = (void *)((uintptr_t)p | 1);
+	RTEMS_OBFUSCATE_VARIABLE(p);
+	a = 123e4;
+	RTEMS_OBFUSCATE_VARIABLE(a);
+	a *= a;
+	memcpy(p, &a, sizeof(a));
+	RTEMS_OBFUSCATE_VARIABLE(p);
+	memcpy(&b, p, sizeof(b));
+	T_eq(a, b, "%f == %f", a, b);
+}