[PATCH v2 08/13] gcov: Add fork(), etc. gcov wrappers

[Sebastian Huber]

The compiler wraps fork(), etc. system calls if coverage generation is enabled.
These functions must be provided by the system.  For RTEMS, they just return an
error status.

Update #4670.
---
 cpukit/libcsupport/src/gcovfork.c | 94 +++++++++++++++++++++++++++++++
 spec/build/cpukit/librtemscpu.yml |  1 +
 2 files changed, 95 insertions(+)
 create mode 100644 cpukit/libcsupport/src/gcovfork.c

diff --git a/cpukit/libcsupport/src/gcovfork.c b/cpukit/libcsupport/src/gcovfork.c
new file mode 100644
index 0000000000..763412d735
--- /dev/null
+++ b/cpukit/libcsupport/src/gcovfork.c
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup libcsupport
+ *
+ * @brief This source file contains functions required by GCC if code and
+ *   branch coverage instrumentation (gcov) is enabled.
+ */
+
+/*
+ * 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 <sys/types.h>
+
+#include <errno.h>
+
+#include <rtems/seterr.h>
+
+int __gcov_execl( const char *, char *, ... );
+
+int __gcov_execl( const char *path, char *arg, ... )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
+
+int __gcov_execlp( const char *, char *, ... );
+
+int __gcov_execlp( const char *path, char *arg, ... )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
+
+int __gcov_execle( const char *, char *, ... );
+
+int __gcov_execle( const char *path, char *arg, ... )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
+
+int __gcov_execv( const char *, char *const[] );
+
+int __gcov_execv( const char *path, char *const argv[] )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
+
+int __gcov_execvp( const char *, char *const[] );
+
+int __gcov_execvp( const char *path, char *const argv[] )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
+
+int __gcov_execve( const char *, char *const[], char *const[] );
+
+int __gcov_execve( const char *path, char *const argv[], char *const envp[] )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
+
+pid_t __gcov_fork( void );
+
+pid_t __gcov_fork( void )
+{
+  rtems_set_errno_and_return_minus_one( ENOSYS );
+}
diff --git a/spec/build/cpukit/librtemscpu.yml b/spec/build/cpukit/librtemscpu.yml
index 965419c389..4a8a0ee1ad 100644
--- a/spec/build/cpukit/librtemscpu.yml
+++ b/spec/build/cpukit/librtemscpu.yml
@@ -640,6 +640,7 @@ source:
 - cpukit/libcsupport/src/ftruncate.c
 - cpukit/libcsupport/src/ftrylockfile.c
 - cpukit/libcsupport/src/funlockfile.c
+- cpukit/libcsupport/src/gcovfork.c
 - cpukit/libcsupport/src/getchark.c
 - cpukit/libcsupport/src/getdents.c
 - cpukit/libcsupport/src/getegid.c
-- 
2.35.3