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Diffstat (limited to 'gmon/sys/gmon.h')
| -rw-r--r-- | gmon/sys/gmon.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/gmon/sys/gmon.h b/gmon/sys/gmon.h new file mode 100644 index 0000000000..6a682d0b10 --- /dev/null +++ b/gmon/sys/gmon.h @@ -0,0 +1,159 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 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 + */ + +#ifndef _SYS_GMON_H_ +#define _SYS_GMON_H_ + +#include <machine-gmon.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 + */ +#define HISTFRACTION 2 + +/* + * 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 << (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; +}; + +/* + * 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 { + 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_ */ |