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/* $OpenBSD: gmon.h,v 1.3 1996/04/21 22:31:46 deraadt Exp $ */
/* $NetBSD: gmon.h,v 1.5 1996/04/09 20:55:30 cgd 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.
* 4. 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
*/
/*
* This file is taken from Cygwin distribution. Please keep it in sync.
* The differences should be within __MINGW32__ guard.
*/
#ifndef _SYS_GMON_H_
#define _SYS_GMON_H_
/*
* Structure prepended to gmon.out profiling data file.
*/
struct gmonhdr {
size_t lpc; /* base pc address of sample buffer */
size_t 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
*/
//#define HISTFRACTION 2
#define HISTFRACTION 1
/*
* 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
#define HASHFRACTION 1
/*
* percent of text space to allocate for tostructs with a minimum.
*/
#define ARCDENSITY 2 /* this is in percentage, relative to text size! */
#define MINARCS 50
#define MAXARCS ((1 << (8 * sizeof(HISTCOUNTER))) - 2)
struct tostruct {
size_t selfpc; /* callee address. The caller address is in froms[] array which points to tos[] array */
unsigned long count; /* how many times it has been called */
unsigned short next; /* next entry in hash table. For tos[0] this is the index of the last used entry */
unsigned short pad; /* additional padding bytes, to have entries 4byte aligned */
};
/*
* a raw arc, with pointers to the calling site and
* the called site and a count.
*/
struct rawarc {
size_t frompc;
size_t selfpc;
long count;
};
/*
* general rounding functions.
*/
#define ROUNDDOWN(x,y) (((x)/(y))*(y))
#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
/*
* The profiling data structures are housed in this structure.
*/
struct gmonparam {
enum { off, on, err } state;
unsigned short *kcount; /* histogram PC sample array */
size_t kcountsize; /* size of kcount[] array in bytes */
unsigned short *froms; /* array of hashed 'from' addresses. The 16bit value is an index into the tos[] array */
size_t fromssize; /* size of froms[] array in bytes */
struct tostruct *tos; /* to struct, contains arc counters */
size_t tossize; /* size of tos[] array in bytes */
size_t tolimit;
size_t lowpc; /* low program counter of area */
size_t highpc; /* high program counter */
size_t textsize; /* code size */
};
extern struct gmonparam _gmonparam;
void _mcleanup(void); /* routine to be called to write gmon.out file */
#endif /* !_SYS_GMONH_ */
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