2 * Copyright (c) 1991, 2001 The Regents of the University of California.
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33 * @(#)gmon.h 5.2 (Berkeley) 5/6/91
40 /* FIXME: Checking a host compiler define means that we can't use
41 a cross gprof to the alpha. */
42 char low_pc
[GMON_PTR_SIZE
]; /* base pc address of sample buffer */
43 char high_pc
[GMON_PTR_SIZE
];/* max pc address of sampled buffer */
44 char ncnt
[4]; /* size of sample buffer (plus this header) */
46 char version
[4]; /* version number */
47 char profrate
[4]; /* profiling clock rate */
48 char spare
[3*4]; /* reserved */
51 #define GMONVERSION 0x00051879
55 char low_pc
[GMON_PTR_SIZE
]; /* base pc address of sample buffer */
56 char high_pc
[GMON_PTR_SIZE
];/* max pc address of sampled buffer */
57 char ncnt
[4]; /* size of sample buffer (plus this header) */
59 /* FIXME: Checking host compiler defines here means that we can't
60 use a cross gprof alpha OSF. */
61 #if defined (__alpha__) && defined (__osf__)
63 * DEC's OSF v3.0 uses 4 bytes of padding to bring the header to
64 * a size that is a multiple of 8.
71 * Histogram counters are unsigned shorts:
73 #define HISTCOUNTER unsigned short
76 * Fraction of text space to allocate for histogram counters here, 1/2:
78 #define HISTFRACTION 2
81 * Fraction of text space to allocate for from hash buckets. The
82 * value of HASHFRACTION is based on the minimum number of bytes of
83 * separation between two subroutine call points in the object code.
84 * Given MIN_SUBR_SEPARATION bytes of separation the value of
85 * HASHFRACTION is calculated as:
87 * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
89 * For the VAX, the shortest two call sequence is:
94 * which is separated by only three bytes, thus HASHFRACTION is
97 * HASHFRACTION = 3 / (2 * 2 - 1) = 1
99 * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
100 * is less than three, this algorithm will not work!
102 #define HASHFRACTION 1
105 * Percent of text space to allocate for tostructs with a minimum:
118 * A raw arc, with pointers to the calling site and the called site
119 * and a count. Everything is defined in terms of characters so
120 * as to get a packed representation (otherwise, different compilers
121 * might introduce different padding):
125 char from_pc
[GMON_PTR_SIZE
];
126 char self_pc
[GMON_PTR_SIZE
];
131 * General rounding functions:
133 #define ROUNDDOWN(x,y) (((x)/(y))*(y))
134 #define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
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