1 files changed, 201 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-affinity-pid.c b/sysdeps/unix/sysv/linux/tst-affinity-pid.c
new file mode 100644
index 0000000000..67402bf7ff
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-affinity-pid.c
@@ -0,0 +1,201 @@
+/* Test for sched_getaffinity and sched_setaffinity, PID version.
+   Copyright (C) 2015-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Function definitions for the benefit of tst-skeleton-affinity.c.
+   This variant forks a child process which then invokes
+   sched_getaffinity and sched_setaffinity on the parent PID.  */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+static int
+write_fully (int fd, const void *buffer, size_t length)
+{
+  const void *end = buffer + length;
+  while (buffer < end)
+    {
+      ssize_t bytes_written = TEMP_FAILURE_RETRY
+        (write (fd, buffer, end - buffer));
+      if (bytes_written < 0)
+        return -1;
+      if (bytes_written == 0)
+        {
+          errno = ENOSPC;
+          return -1;
+        }
+      buffer += bytes_written;
+    }
+  return 0;
+}
+
+static ssize_t
+read_fully (int fd, void *buffer, size_t length)
+{
+  const void *start = buffer;
+  const void *end = buffer + length;
+  while (buffer < end)
+    {
+      ssize_t bytes_read = TEMP_FAILURE_RETRY
+        (read (fd, buffer, end - buffer));
+      if (bytes_read < 0)
+        return -1;
+      if (bytes_read == 0)
+        return buffer - start;
+      buffer += bytes_read;
+    }
+  return length;
+}
+
+static int
+process_child_response (int *pipes, pid_t child,
+                        cpu_set_t *set, size_t size)
+{
+  close (pipes[1]);
+
+  int value_from_child;
+  ssize_t bytes_read = read_fully
+    (pipes[0], &value_from_child, sizeof (value_from_child));
+  if (bytes_read < 0)
+    {
+      printf ("error: read from child: %m\n");
+      exit (1);
+    }
+  if (bytes_read != sizeof (value_from_child))
+    {
+      printf ("error: not enough bytes from child: %zd\n", bytes_read);
+      exit (1);
+    }
+  if (value_from_child == 0)
+    {
+      bytes_read = read_fully (pipes[0], set, size);
+      if (bytes_read < 0)
+        {
+          printf ("error: read: %m\n");
+          exit (1);
+        }
+      if (bytes_read != size)
+        {
+          printf ("error: not enough bytes from child: %zd\n", bytes_read);
+          exit (1);
+        }
+    }
+
+  int status;
+  if (waitpid (child, &status, 0) < 0)
+    {
+      printf ("error: waitpid: %m\n");
+      exit (1);
+    }
+  if (!(WIFEXITED (status) && WEXITSTATUS (status) == 0))
+    {
+      printf ("error: invalid status from : %m\n");
+      exit (1);
+    }
+
+  close (pipes[0]);
+
+  if (value_from_child != 0)
+    {
+      errno = value_from_child;
+      return -1;
+    }
+  return 0;
+}
+
+static int
+getaffinity (size_t size, cpu_set_t *set)
+{
+  int pipes[2];
+  if (pipe (pipes) < 0)
+    {
+      printf ("error: pipe: %m\n");
+      exit (1);
+    }
+
+  int ret = fork ();
+  if (ret < 0)
+    {
+      printf ("error: fork: %m\n");
+      exit (1);
+    }
+  if (ret == 0)
+    {
+      /* Child.  */
+      int ret = sched_getaffinity (getppid (), size, set);
+      if (ret < 0)
+        ret = errno;
+      if (write_fully (pipes[1], &ret, sizeof (ret)) < 0
+          || write_fully (pipes[1], set, size) < 0
+          || (ret == 0 && write_fully (pipes[1], set, size) < 0))
+        {
+          printf ("error: write: %m\n");
+          _exit (1);
+        }
+      _exit (0);
+    }
+
+  /* Parent.  */
+  return process_child_response (pipes, ret, set, size);
+}
+
+static int
+setaffinity (size_t size, const cpu_set_t *set)
+{
+  int pipes[2];
+  if (pipe (pipes) < 0)
+    {
+      printf ("error: pipe: %m\n");
+      exit (1);
+    }
+
+  int ret = fork ();
+  if (ret < 0)
+    {
+      printf ("error: fork: %m\n");
+      exit (1);
+    }
+  if (ret == 0)
+    {
+      /* Child.  */
+      int ret = sched_setaffinity (getppid (), size, set);
+      if (write_fully (pipes[1], &ret, sizeof (ret)) < 0)
+        {
+          printf ("error: write: %m\n");
+          _exit (1);
+        }
+      _exit (0);
+    }
+
+  /* Parent.  There is no affinity mask to read from the child, so the
+     size is 0.  */
+  return process_child_response (pipes, ret, NULL, 0);
+}
+
+struct conf;
+static bool early_test (struct conf *unused)
+{
+  return true;
+}
+
+#include "tst-skeleton-affinity.c"