[PATCH 02/10] rtems: Add rtems_get_build_hash()

Sebastian Huber sebastian.huber at embedded-brains.de
Wed Feb 24 13:57:22 UTC 2021 

Update #4265.
---
 cpukit/Makefile.am                 |  1 +
 cpukit/include/rtems/config.h      | 36 +++++++++++++++++++-
 cpukit/sapi/src/getbuildhash.c     | 54 ++++++++++++++++++++++++++++++
 spec/build/cpukit/cfgbuildhash.yml | 14 ++++++++
 spec/build/cpukit/cfghdr.yml       |  2 ++
 spec/build/cpukit/librtemscpu.yml  |  1 +
 6 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 cpukit/sapi/src/getbuildhash.c
 create mode 100644 spec/build/cpukit/cfgbuildhash.yml

diff --git a/cpukit/Makefile.am b/cpukit/Makefile.am
index a31cd31596..8e0c42190b 100644
--- a/cpukit/Makefile.am
+++ b/cpukit/Makefile.am
@@ -1062,6 +1062,7 @@ librtemscpu_a_SOURCES += sapi/src/extensiondelete.c
 librtemscpu_a_SOURCES += sapi/src/extensionident.c
 librtemscpu_a_SOURCES += sapi/src/fatal.c
 librtemscpu_a_SOURCES += sapi/src/fatalsrctext.c
+librtemscpu_a_SOURCES += sapi/src/getbuildhash.c
 librtemscpu_a_SOURCES += sapi/src/getconfigmax.c
 librtemscpu_a_SOURCES += sapi/src/getcopyrightnotice.c
 librtemscpu_a_SOURCES += sapi/src/getversionstring.c
diff --git a/cpukit/include/rtems/config.h b/cpukit/include/rtems/config.h
index a3eec39584..969a2fddb8 100644
--- a/cpukit/include/rtems/config.h
+++ b/cpukit/include/rtems/config.h
@@ -10,7 +10,7 @@
  */
 
 /*
- * Copyright (C) 2009, 2020 embedded brains GmbH (http://www.embedded-brains.de)
+ * Copyright (C) 2009, 2021 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
@@ -93,6 +93,40 @@ extern "C" {
  * configuration option values, for example rtems_resource_unlimited().
  */
 
+/* Generated from spec:/rtems/config/if/get-build-hash */
+
+/**
+ * @ingroup RTEMSAPIConfig
+ *
+ * @brief Gets the RTEMS build hash.
+ *
+ * The build hash is calculated from all key-value pairs of the build
+ * environment.  Local file system paths in the values do not contribute to the
+ * hash value.
+ *
+ * @return Returns the pointer to the RTEMS build hash.
+ *
+ * @par Notes
+ * @parblock
+ * An example of a key-value pair of the build environment are the ``CFLAGS``.
+ * So, when the optimization compiler option ``-O2`` changes to ``-O0``, the
+ * build hash changes as well.
+ *
+ * The build hash can be used to distinguish test suite results obtained from
+ * different build environments.
+ * @endparblock
+ *
+ * @par Constraints
+ * @parblock
+ * The following constraints apply to this directive:
+ *
+ * * The directive may be called from within any runtime context.
+ *
+ * * The directive will not cause the calling task to be preempted.
+ * @endparblock
+ */
+const char *rtems_get_build_hash( void );
+
 /* Generated from spec:/rtems/config/if/get-copyright-notice */
 
 /**
diff --git a/cpukit/sapi/src/getbuildhash.c b/cpukit/sapi/src/getbuildhash.c
new file mode 100644
index 0000000000..51e6dfbf5b
--- /dev/null
+++ b/cpukit/sapi/src/getbuildhash.c
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSImplClassic
+ *
+ * @brief This source file contains the implementation of
+ *   rtems_get_build_hash().
+ */
+
+/*
+ * Copyright (C) 2021 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/config.h>
+
+#if HAVE_RTEMS_BUILD_HASH
+#include <rtems/build-hash.h>
+#endif
+
+const char *rtems_get_build_hash( void )
+{
+#if HAVE_RTEMS_BUILD_HASH
+  return RTEMS_BUILD_HASH;
+#else
+  return "default";
+#endif
+}
diff --git a/spec/build/cpukit/cfgbuildhash.yml b/spec/build/cpukit/cfgbuildhash.yml
new file mode 100644
index 0000000000..2413b2b71f
--- /dev/null
+++ b/spec/build/cpukit/cfgbuildhash.yml
@@ -0,0 +1,14 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+actions:
+- set-value: true
+- define-condition: null
+build-type: option
+copyrights:
+- Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
+default: null
+default-by-variant: []
+description: ''
+enabled-by: true
+links: []
+name: HAVE_RTEMS_BUILD_HASH
+type: build
diff --git a/spec/build/cpukit/cfghdr.yml b/spec/build/cpukit/cfghdr.yml
index 58407fb54b..731a711fc7 100644
--- a/spec/build/cpukit/cfghdr.yml
+++ b/spec/build/cpukit/cfghdr.yml
@@ -66,5 +66,7 @@ links:
   uid: cfgsztime
 - role: build-dependency
   uid: cfgunistd
+- role: build-dependency
+  uid: cfgbuildhash
 target: cpukit/include/config.h
 type: build
diff --git a/spec/build/cpukit/librtemscpu.yml b/spec/build/cpukit/librtemscpu.yml
index 8bd108bea8..c79d046af1 100644
--- a/spec/build/cpukit/librtemscpu.yml
+++ b/spec/build/cpukit/librtemscpu.yml
@@ -1338,6 +1338,7 @@ source:
 - cpukit/sapi/src/extensionident.c
 - cpukit/sapi/src/fatal.c
 - cpukit/sapi/src/fatalsrctext.c
+- cpukit/sapi/src/getbuildhash.c
 - cpukit/sapi/src/getconfigmax.c
 - cpukit/sapi/src/getcopyrightnotice.c
 - cpukit/sapi/src/getversionstring.c
-- 
2.26.2

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