1  /*
 2   * Copyright (c) 2015 Apple Inc. All rights reserved.
 3   *
 4   * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 5   *
 6   * This file contains Original Code and/or Modifications of Original Code
 7   * as defined in and that are subject to the Apple Public Source License
 8   * Version 2.0 (the 'License'). You may not use this file except in
 9   * compliance with the License. The rights granted to you under the License
10   * may not be used to create, or enable the creation or redistribution of,
11   * unlawful or unlicensed copies of an Apple operating system, or to
12   * circumvent, violate, or enable the circumvention or violation of, any
13   * terms of an Apple operating system software license agreement.
14   *
15   * Please obtain a copy of the License at
16   * http://www.opensource.apple.com/apsl/ and read it before using this file.
17   *
18   * The Original Code and all software distributed under the License are
19   * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20   * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21   * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22   * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23   * Please see the License for the specific language governing rights and
24   * limitations under the License.
25   *
26   * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27   */
28  
29  #include <mach/mach_types.h>
30  #include <mach/host_special_ports.h>
31  #include <mach/host_priv.h>
32  #include <ipc/ipc_port.h>
33  #include <kern/host.h>
34  
35  #include <mach/ktrace_background.h>
36  
37  kern_return_t ktrace_background_available_notify_user(void);
38  
39  /*
40   * If user space has registered for background notifications, send one.
41   */
42  kern_return_t
43  ktrace_background_available_notify_user(void)
44  {
45  	mach_port_t user_port;
46  	kern_return_t kr;
47  
48  	kr = host_get_ktrace_background_port(host_priv_self(), &user_port);
49  	if (kr != KERN_SUCCESS || !IPC_PORT_VALID(user_port)) {
50  		return KERN_FAILURE;
51  	}
52  
53  	kr = send_ktrace_background_available(user_port);
54  	ipc_port_release_send(user_port);
55  	return kr;
56  }