1/*-
2 * Copyright (c) Sun Microsystems, Inc. 1998 All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by the SMCC Technology
18 *      Development Group at Sun Microsystems, Inc.
19 *
20 * 4. The name of the Sun Microsystems, Inc nor may not be used to endorse or
21 *      promote products derived from this software without specific prior
22 *      written permission.
23 *
24 * SUN MICROSYSTEMS DOES NOT CLAIM MERCHANTABILITY OF THIS SOFTWARE OR THE
25 * SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE.  The software is
26 * provided "as is" without express or implied warranty of any kind.
27 *
28 * These notices must be retained in any copies of any part of this software.
29 *
30 * $KAME: altq_rmclass_debug.h,v 1.3 2002/11/29 04:36:24 kjc Exp $
31 * $FreeBSD: releng/11.0/sys/net/altq/altq_rmclass_debug.h 281642 2015-04-17 06:38:31Z glebius $
32 */
33
34#ifndef _ALTQ_ALTQ_RMCLASS_DEBUG_H_
35#define	_ALTQ_ALTQ_RMCLASS_DEBUG_H_
36
37/* #pragma ident	"@(#)rm_class_debug.h	1.7	98/05/04 SMI" */
38
39/*
40 * Cbq debugging macros
41 */
42
43#ifdef __cplusplus
44extern "C" {
45#endif
46
47#ifdef	CBQ_TRACE
48#ifndef NCBQTRACE
49#define	NCBQTRACE (16 * 1024)
50#endif
51
52/*
53 * To view the trace output, using adb, type:
54 *	adb -k /dev/ksyms /dev/mem <cr>, then type
55 *	cbqtrace_count/D to get the count, then type
56 *	cbqtrace_buffer,0tcount/Dp4C" "Xn
57 *	This will dump the trace buffer from 0 to count.
58 */
59/*
60 * in ALTQ, "call cbqtrace_dump(N)" from DDB to display 20 events
61 * from Nth event in the circular buffer.
62 */
63
64struct cbqtrace {
65	int count;
66	int function;		/* address of function */
67	int trace_action;	/* descriptive 4 characters */
68	int object;		/* object operated on */
69};
70
71extern struct cbqtrace cbqtrace_buffer[];
72extern struct cbqtrace *cbqtrace_ptr;
73extern int cbqtrace_count;
74
75#define	CBQTRACEINIT() {				\
76	if (cbqtrace_ptr == NULL)		\
77		cbqtrace_ptr = cbqtrace_buffer; \
78	else { \
79		cbqtrace_ptr = cbqtrace_buffer; \
80		bzero((void *)cbqtrace_ptr, sizeof(cbqtrace_buffer)); \
81		cbqtrace_count = 0; \
82	} \
83}
84
85#define	LOCK_TRACE()	splimp()
86#define	UNLOCK_TRACE(x)	splx(x)
87
88#define	CBQTRACE(func, act, obj) {		\
89	int __s = LOCK_TRACE();			\
90	int *_p = &cbqtrace_ptr->count;	\
91	*_p++ = ++cbqtrace_count;		\
92	*_p++ = (int)(func);			\
93	*_p++ = (int)(act);			\
94	*_p++ = (int)(obj);			\
95	if ((struct cbqtrace *)(void *)_p >= &cbqtrace_buffer[NCBQTRACE])\
96		cbqtrace_ptr = cbqtrace_buffer; \
97	else					\
98		cbqtrace_ptr = (struct cbqtrace *)(void *)_p; \
99	UNLOCK_TRACE(__s);			\
100	}
101#else
102
103/* If no tracing, define no-ops */
104#define	CBQTRACEINIT()
105#define	CBQTRACE(a, b, c)
106
107#endif	/* !CBQ_TRACE */
108
109#ifdef __cplusplus
110}
111#endif
112
113#endif	/* _ALTQ_ALTQ_RMCLASS_DEBUG_H_ */
114