[PATCH 2/7] score: Add _Memory_Dirty()

[Sebastian Huber]

Update #3838.
---
 cpukit/Makefile.am                  |  1 +
 cpukit/include/rtems/score/memory.h | 11 ++++++++-
 cpukit/score/src/memorydirty.c      | 48 +++++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 cpukit/score/src/memorydirty.c

diff --git a/cpukit/Makefile.am b/cpukit/Makefile.am
index 4f21b48a32..62c34c9c00 100644
--- a/cpukit/Makefile.am
+++ b/cpukit/Makefile.am
@@ -853,6 +853,7 @@ librtemscpu_a_SOURCES += score/src/heapiterate.c
 librtemscpu_a_SOURCES += score/src/heapgreedy.c
 librtemscpu_a_SOURCES += score/src/heapnoextend.c
 librtemscpu_a_SOURCES += score/src/memoryallocate.c
+librtemscpu_a_SOURCES += score/src/memorydirty.c
 librtemscpu_a_SOURCES += score/src/objectallocate.c
 librtemscpu_a_SOURCES += score/src/objectclose.c
 librtemscpu_a_SOURCES += score/src/objectextendinformation.c
diff --git a/cpukit/include/rtems/score/memory.h b/cpukit/include/rtems/score/memory.h
index e4d1198862..dd3b7833a3 100644
--- a/cpukit/include/rtems/score/memory.h
+++ b/cpukit/include/rtems/score/memory.h
@@ -306,7 +306,7 @@ const Memory_Information *_Memory_Get( void );
 /**
  * @brief Allocate a memory area from the memory information.
  *
- * It is not possible to free the memory allocated by this function.
+ * It is not possible to free the memory area allocated by this function.
  *
  * @param information The memory information.
  * @param size The size in bytes of the memory area to allocate.
@@ -322,6 +322,15 @@ void *_Memory_Allocate(
   uintptr_t                 alignment
 );
 
+/**
+ * @brief Dirty all free memory areas of the memory information.
+ *
+ * Write 0xcf to all bytes of the free memory areas.
+ *
+ * @param information The memory information.
+ */
+void _Memory_Dirty( const Memory_Information *information );
+
 /** @} */
 
 #ifdef __cplusplus
diff --git a/cpukit/score/src/memorydirty.c b/cpukit/score/src/memorydirty.c
new file mode 100644
index 0000000000..b404ca126c
--- /dev/null
+++ b/cpukit/score/src/memorydirty.c
@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2019 embedded brains GmbH
+ *
+ * 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.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/score/memory.h>
+
+#include <string.h>
+
+void _Memory_Dirty( const Memory_Information *information )
+{
+  Memory_Area       *area;
+  const Memory_Area *end;
+
+  area = &information->areas[ 0 ];
+  end = &information->areas[ information->count ];
+
+  while ( area != end ) {
+    memset( _Memory_Free_begin( area ), 0xcf, _Memory_Free_size( area ) );
+    ++area;
+  }
+}
-- 
2.16.4