From 8c4d15d5b824fd02bd6909f6d254828732f3bb7b Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Tue, 4 Nov 2014 18:46:42 +0100
Subject: kern: provide notifications about new tasks

These notifications are sent to the port registered via
`register_new_task_notification' and provide a robust parental
relation between tasks to a userspace server.

* Makefrag.am: Add task_notify.defs.
* include/mach/gnumach.defs: Add register_new_task_notification.
* include/mach/task_notify.defs: New file.
* kern/task.c (new_task_notification): New variable.
(task_create): Send new task notifications.
(register_new_task_notification): Add server function.
* kern/task_notify.cli: New file.
---
 include/mach/gnumach.defs     |  8 ++++++++
 include/mach/task_notify.defs | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 include/mach/task_notify.defs

(limited to 'include/mach')

diff --git a/include/mach/gnumach.defs b/include/mach/gnumach.defs
index 6cfbb0d..bac3b09 100644
--- a/include/mach/gnumach.defs
+++ b/include/mach/gnumach.defs
@@ -72,3 +72,11 @@ simpleroutine thread_terminate_release(
 simpleroutine task_set_name(
 		task	: task_t;
 		name	: kernel_debug_name_t);
+
+/*
+ * Register a port to which a notification about newly created tasks
+ * are sent.
+ */
+routine register_new_task_notification(
+		host_priv	: host_priv_t;
+		notification	: mach_port_send_t);
diff --git a/include/mach/task_notify.defs b/include/mach/task_notify.defs
new file mode 100644
index 0000000..5485d4e
--- /dev/null
+++ b/include/mach/task_notify.defs
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2014 Free Software Foundation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+subsystem
+#if	KERNEL_SERVER
+	  KernelServer
+#endif	/* KERNEL_SERVER */
+#if	KERNEL_USER
+	  KernelUser
+#endif	/* KERNEL_USER */
+		       task_notify 4400;
+
+#include <mach/std_types.defs>
+#include <mach/mach_types.defs>
+
+/* These notifications are sent to the port registered via
+   `register_new_task_notification' and provide a robust parental
+   relation between tasks.  */
+simpleroutine mach_notify_new_task(
+		notify	: mach_port_t;
+		task	: task_t;
+		parent	: task_t);
-- 
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