LCOM1920-T02G10

/*        $NetBSD: gmon.h,v 1.10 2012/03/09 15:38:03 christos Exp $        */

/*-

 * Copyright (c) 1982, 1986, 1992, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)gmon.h        8.2 (Berkeley) 1/4/94

 */

#ifndef _SYS_GMON_H_

#define _SYS_GMON_H_

#include <machine/profile.h>

/*

 * Structure prepended to gmon.out profiling data file.

 */

struct gmonhdr {

        u_long        lpc;                /* base pc address of sample buffer */

        u_long        hpc;                /* max pc address of sampled buffer */

        int        ncnt;                /* size of sample buffer (plus this header) */

        int        version;        /* version number */

        int        profrate;        /* profiling clock rate */

        int        spare[3];        /* reserved */

};

#define GMONVERSION        0x00051879

/*

 * histogram counters are unsigned shorts (according to the kernel).

 */

#define        HISTCOUNTER        unsigned short

/*

 * fraction of text space to allocate for histogram counters here, 1/2

 */

#ifndef HISTFRACTION

#define        HISTFRACTION        2

#endif        /* HISTFRACTION */

/*

 * Fraction of text space to allocate for from hash buckets.

 * The value of HASHFRACTION is based on the minimum number of bytes

 * of separation between two subroutine call points in the object code.

 * Given MIN_SUBR_SEPARATION bytes of separation the value of

 * HASHFRACTION is calculated as:

 *

 *        HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);

 *

 * For example, on the VAX, the shortest two call sequence is:

 *

 *        calls        $0,(r0)

 *        calls        $0,(r0)

 *

 * which is separated by only three bytes, thus HASHFRACTION is

 * calculated as:

 *

 *        HASHFRACTION = 3 / (2 * 2 - 1) = 1

 *

 * Note that the division above rounds down, thus if MIN_SUBR_FRACTION

 * is less than three, this algorithm will not work!

 *

 * In practice, however, call instructions are rarely at a minimal

 * distance.  Hence, we will define HASHFRACTION to be 2 across all

 * architectures.  This saves a reasonable amount of space for

 * profiling data structures without (in practice) sacrificing

 * any granularity.

 */

#define        HASHFRACTION        2

/*

 * percent of text space to allocate for tostructs with a minimum.

 */

#define ARCDENSITY        2

#define MINARCS                50

#define MAXARCS                ((1 << (unsigned int)(8 * sizeof(HISTCOUNTER))) - 2)

struct tostruct {

        u_long        selfpc;

        long        count;

        u_short        link;

        u_short pad;

};

/*

 * a raw arc, with pointers to the calling site and

 * the called site and a count.

 */

struct rawarc {

        u_long        raw_frompc;

        u_long        raw_selfpc;

        long        raw_count;

};

/*

 * The profiling data structures are housed in this structure.

 */

struct gmonparam {

        int                state;

        u_short                *kcount;

        u_long                kcountsize;

        u_short                *froms;

        u_long                fromssize;

        struct tostruct        *tos;

        u_long                tossize;

        long                tolimit;

        u_long                lowpc;

        u_long                highpc;

        u_long                textsize;

        u_long                hashfraction;

};

extern struct gmonparam _gmonparam;

/*

 * Possible states of profiling.

 */

#define        GMON_PROF_ON        0

#define        GMON_PROF_BUSY        1

#define        GMON_PROF_ERROR        2

#define        GMON_PROF_OFF        3

/*

 * Sysctl definitions for extracting profiling information from the kernel.

 */

#define        GPROF_STATE        0        /* int: profiling enabling variable */

#define        GPROF_COUNT        1        /* struct: profile tick count buffer */

#define        GPROF_FROMS        2        /* struct: from location hash bucket */

#define        GPROF_TOS        3        /* struct: destination/count structure */

#define        GPROF_GMONPARAM        4        /* struct: profiling parameters (see above) */

#endif /* !_SYS_GMON_H_ */