Update.

	* Makefile: Add rules to build and run tst-atfork2 test.
	* tst-atfork2.c: New file.
	* tst-atfork2mod.c: New file.

	* sysdeps/unix/sysv/linux/unregister-atfork.c
	(__unregister_atfork): Free the memory allocated for the handlers
	after removing them from the lists.

	* sysdeps/unix/sysv/linux/register-atfork.c: Define memeory
	cleanup function.

	* tst-atfork1.c (do_test): Wait for the child we forked.
	Report error in child.

	* sysdeps/unix/sysv/linux/fork.c (__libc_fork): Fix comment.

1 files changed, 159 insertions, 0 deletions

diff --git a/nptl/tst-atfork2.c b/nptl/tst-atfork2.c
new file mode 100644
index 0000000000..f162f80e6b
--- /dev/null
+++ b/nptl/tst-atfork2.c
@@ -0,0 +1,159 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <dlfcn.h>
+#include <errno.h>
+#include <mcheck.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+
+/* Must be exported.  */
+int val;
+
+static void
+prepare (void)
+{
+  val *= 2;
+}
+
+static void
+parent (void)
+{
+  val += 4;
+}
+
+static void
+child (void)
+{
+  val += 8;
+}
+
+
+static int
+do_test (void)
+{
+  mtrace ();
+
+  if (pthread_atfork (prepare, parent, child) != 0)
+    {
+      puts ("do_test: atfork failed");
+      exit (1);
+    }
+
+  void *h = dlopen ("tst-atfork2mod.so", RTLD_LAZY);
+  if (h == NULL)
+    {
+      printf ("dlopen failed: %s\n", dlerror ());
+      exit (1);
+    }
+
+  /* First trial of fork.  */
+  pid_t pid = fork ();
+  if (pid == -1)
+    {
+      puts ("1st fork failed");
+      exit (1);
+    }
+
+  if (pid == 0)
+    {
+      /* Child.  */
+      if (val != 80)
+	{
+	  printf ("1st: expected val=%d, got %d\n", 80, val);
+	  exit (2);
+	}
+
+      exit (0);
+    }
+
+  /* Parent.  */
+  if (val != 24)
+    {
+      printf ("1st: expected val=%d, got %d\n", 24, val);
+      exit (1);
+    }
+
+  int status;
+  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
+    {
+      puts ("1st waitpid failed");
+      exit (1);
+    }
+
+  if (status != 0)
+    exit (status);
+
+  puts ("unloading now");
+
+  /* Unload the module.  */
+  if (dlclose (h) != 0)
+    {
+      puts ("dlclose failed");
+      exit (1);
+    }
+
+  puts ("2nd fork");
+
+  /* Second fork trial.   */
+  val = 1;
+  pid = fork ();
+  if (pid == -1)
+    {
+      puts ("2nd fork failed");
+      exit (1);
+    }
+
+  if (pid == 0)
+    {
+      /* Child.  */
+      if (val != 10)
+	{
+	  printf ("2nd: expected val=%d, got %d\n", 10, val);
+	  exit (3);
+	}
+
+      exit (0);
+    }
+
+  /* Parent.  */
+  if (val != 6)
+    {
+      printf ("2nd: expected val=%d, got %d\n", 6, val);
+      exit (1);
+    }
+
+  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
+    {
+      puts ("2nd waitpid failed");
+      exit (1);
+    }
+
+  if (status != 0)
+    exit (status);
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"