2 * Copyright (c) 1983, 1991, 1993, 2001
3 * The Regents of the University of California. All rights reserved.
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14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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32 /* Size of the 4.4BSD gmon header */
33 #define GMON_HDRSIZE_BSD44_32 (4 + 4 + 4 + 4 + 4 + (3 * 4))
34 #define GMON_HDRSIZE_BSD44_64 (8 + 8 + 4 + 4 + 4 + (3 * 4))
37 /* For documentation purposes only.
41 char low_pc[sizeof(void *)]; -- base pc address of sample buffer
42 char high_pc[sizeof(void *)]; -- max pc address of sampled buffer
43 char ncnt[4]; -- size of sample buffer (plus this
46 char version[4]; -- version number
47 char profrate[4]; -- profiling clock rate
48 char spare[3*4]; -- reserved
53 #define GMONVERSION 0x00051879
55 /* Size of the old BSD gmon header */
56 #define GMON_HDRSIZE_OLDBSD_32 (4 + 4 + 4)
58 /* FIXME: Checking host compiler defines here means that we can't
59 use a cross gprof alpha OSF. */
60 #if defined(__alpha__) && defined (__osf__)
61 #define GMON_HDRSIZE_OLDBSD_64 (8 + 8 + 4 + 4)
63 #define GMON_HDRSIZE_OLDBSD_64 (8 + 8 + 4)
67 /* For documentation purposes only.
71 char low_pc[sizeof(void *)]; -- base pc address of sample buffer
72 char high_pc[sizeof(void *)] -- max pc address of sampled buffer
73 char ncnt[4]; -- size of sample buffer (plus this
76 if defined (__alpha__) && defined (__osf__)
77 char pad[4]; -- DEC's OSF v3.0 uses 4 bytes of padding
78 -- to bring the header to a size that is a
86 * Histogram counters are unsigned shorts:
88 #define HISTCOUNTER unsigned short
91 * Fraction of text space to allocate for histogram counters here, 1/2:
93 #define HISTFRACTION 2
96 * Fraction of text space to allocate for from hash buckets. The
97 * value of HASHFRACTION is based on the minimum number of bytes of
98 * separation between two subroutine call points in the object code.
99 * Given MIN_SUBR_SEPARATION bytes of separation the value of
100 * HASHFRACTION is calculated as:
102 * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
104 * For the VAX, the shortest two call sequence is:
109 * which is separated by only three bytes, thus HASHFRACTION is
112 * HASHFRACTION = 3 / (2 * 2 - 1) = 1
114 * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
115 * is less than three, this algorithm will not work!
117 #define HASHFRACTION 1
120 * Percent of text space to allocate for tostructs with a minimum:
133 * A raw arc, with pointers to the calling site and the called site
134 * and a count. Everything is defined in terms of characters so
135 * as to get a packed representation (otherwise, different compilers
136 * might introduce different padding):
140 /* For documentation purposes only.
144 char from_pc[sizeof(void *)];
145 char self_pc[sizeof(void *)];
146 char count[sizeof(long)];
152 * General rounding functions:
154 #define ROUNDDOWN(x,y) (((x)/(y))*(y))
155 #define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
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