Add ostest vfork test (does not work yet)

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5488 42af7a65-404d-4744-a932-0658087f49c3

examples/ostest/Makefile

@@ -84,6 +84,10 @@ ifneq ($(CONFIG_DISABLE_POSIX_TIMERS),y)
 CSRCS		+= posixtimer.c
 endif
 
+ifeq ($(CONFIG_ARCH_HAVE_VFORK),y)
+CSRCS		+= vfork.c
+endif
+
 ifneq ($(CONFIG_DISABLE_SIGNALS),y)
 ifneq ($(CONFIG_DISABLE_PTHREAD),y)
 ifeq ($(CONFIG_PRIORITY_INHERITANCE),y)

examples/ostest/ostest.h

@@ -163,6 +163,12 @@ extern void barrier_test(void);
 
 extern void priority_inheritance(void);
 
+/* vfork.c ******************************************************************/
+
+#ifdef CONFIG_ARCH_HAVE_VFORK
+extern int vfork_test(void);
+#endif
+
 /* APIs exported (conditionally) by the OS specifically for testing of
  * priority inheritance
  */

examples/ostest/ostest_main.c

@@ -409,6 +409,11 @@ static int user_main(int argc, char *argv[])
       check_test_memory_usage();
 #endif /* CONFIG_PRIORITY_INHERITANCE && !CONFIG_DISABLE_SIGNALS && !CONFIG_DISABLE_PTHREAD */
 
+#ifdef CONFIG_ARCH_HAVE_VFORK
+      printf("\nuser_main: vfork() test\n");
+      vfork_test();
+#endif
+
       /* Compare memory usage at time ostest_main started until
        * user_main exits.  These should not be identical, but should
        * be similar enough that we can detect any serious OS memory
@@ -428,6 +433,7 @@ static int user_main(int argc, char *argv[])
       show_memory_usage(&g_mmbefore, &g_mmafter);
 #endif
     }
+
   printf("user_main: Exitting\n");
   return 0;
 }

examples/ostest/vfork.c

@@ -0,0 +1,99 @@
+/****************************************************************************
+ * examples/ostest/vfork.c
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "ostest.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if defined(CONFIG_ARCH_HAVE_VFORK) && !defined(CONFIG_DISABLE_SIGNALS)
+static volatile bool g_vforkchild;
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int vfork_test(void)
+{
+#if defined(CONFIG_ARCH_HAVE_VFORK) && !defined(CONFIG_DISABLE_SIGNALS)
+  pid_t pid;
+
+  g_vforkchild = false;
+  pid = vfork();
+  if (pid == 0)
+    {
+      /* There is not very much that the child is permitted to do.  Perhaps
+       * it can just set g_vforkchild.
+       */
+
+      g_vforkchild = true;
+      exit(0);
+    }
+  else if (pid < 0)
+    {
+      printf("vfork_test: vfork() failed: %d\n", errno);
+      return -1;
+    }
+  else
+    {
+      sleep(1);
+      if (g_vforkchild)
+        {
+          printf("vfork_test: Child %d ran successfully\n", pid);
+        }
+      else
+        {
+          printf("vfork_test: ERROR Child %d did not run\n", pid);
+          return -1;
+        }
+    }
+#endif
+
+  return 0;
+}