1/*
2 * Copyright (c) 2011 Apple Computer, 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/* fwd decl */
30struct kperf_sample;
31struct kperf_context;
32
33
34/* bits for defining what to do on an action */
35#define SAMPLER_TINFO    (1<<0)
36#define SAMPLER_TINFOEX  (1<<1)
37#define SAMPLER_KSTACK   (1<<2)
38#define SAMPLER_USTACK   (1<<3)
39
40/*  Take a sample into "sbuf" using current thread "cur_thread" */
41extern kern_return_t kperf_sample( struct kperf_sample *sbuf,
42				   struct kperf_context*,
43                                   unsigned actionid,
44                                   boolean_t pend_user );
45
46/* return codes from taking a sample
47 * either keep trigger, or something went wrong (or we're shutting down)
48 * so turn off.
49 */
50#define SAMPLE_CONTINUE (0)
51#define SAMPLE_SHUTDOWN (1)
52
53/* Get the sample buffer to use from interrupt handler context. Only
54 * valid in interrupt contexts.
55 */
56extern struct kperf_sample* kperf_intr_sample_buffer(void);
57
58/* Interface functions  */
59extern unsigned kperf_action_get_count(void);
60extern int kperf_action_set_count(unsigned count);
61
62extern int kperf_action_set_samplers( unsigned actionid,
63                                      uint32_t samplers );
64extern int kperf_action_get_samplers( unsigned actionid,
65                                      uint32_t *samplers_out );
66
67extern void
68kperf_thread_ast_handler( thread_t thread );
69