2 * Copyright (c) 1991 The Regents of the University of California.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
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12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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33 * @(#)gmon.h 5.2 (Berkeley) 5/6/91
40 char low_pc[sizeof (bfd_vma)]; /* base pc address of sample buffer */
41 char high_pc[sizeof (bfd_vma)]; /* max pc address of sampled buffer */
42 char ncnt[4]; /* size of sample buffer (plus this header) */
44 #if defined (__alpha__) && defined (__osf__)
46 * DEC's OSF v3.0 uses 4 bytes of padding to bring the header to
47 * a size that is a multiple of 8.
50 #elif defined (BSD44_FORMAT)
51 char version[4]; /* version number */
52 char profrate[4]; /* profiling clock rate */
53 char spare[3*4]; /* reserved */
58 * Histogram counters are unsigned shorts:
60 #define HISTCOUNTER unsigned short
63 * Fraction of text space to allocate for histogram counters here, 1/2:
65 #define HISTFRACTION 2
68 * Fraction of text space to allocate for from hash buckets. The
69 * value of HASHFRACTION is based on the minimum number of bytes of
70 * separation between two subroutine call points in the object code.
71 * Given MIN_SUBR_SEPARATION bytes of separation the value of
72 * HASHFRACTION is calculated as:
74 * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
76 * For the VAX, the shortest two call sequence is:
81 * which is separated by only three bytes, thus HASHFRACTION is
84 * HASHFRACTION = 3 / (2 * 2 - 1) = 1
86 * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
87 * is less than three, this algorithm will not work!
89 #define HASHFRACTION 1
92 * Percent of text space to allocate for tostructs with a minimum:
105 * A raw arc, with pointers to the calling site and the called site
106 * and a count. Everything is defined in terms of characters so
107 * as to get a packed representation (otherwise, different compilers
108 * might introduce different padding):
112 char from_pc[sizeof (bfd_vma)];
113 char self_pc[sizeof (bfd_vma)];
114 char count[sizeof (long)];
118 * General rounding functions:
120 #define ROUNDDOWN(x,y) (((x)/(y))*(y))
121 #define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))