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[binutils.git] / gprof / gmon.h
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1 /*
2 * Copyright (c) 1983, 1991, 1993, 2001
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
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
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
29 #ifndef gmon_h
30 #define gmon_h
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))
36 #if 0 /* For documentation purposes only. */
37 struct raw_phdr
39 char low_pc[sizeof(void *)]; /* base pc address of sample buffer */
40 char high_pc[sizeof(void *)];/* max pc address of sampled buffer */
41 char ncnt[4]; /* size of sample buffer (plus this
42 header) */
44 char version[4]; /* version number */
45 char profrate[4]; /* profiling clock rate */
46 char spare[3*4]; /* reserved */
48 #endif
50 #define GMONVERSION 0x00051879
52 /* Size of the old BSD gmon header */
53 #define GMON_HDRSIZE_OLDBSD_32 (4 + 4 + 4)
55 /* FIXME: Checking host compiler defines here means that we can't
56 use a cross gprof alpha OSF. */
57 #if defined(__alpha__) && defined (__osf__)
58 #define GMON_HDRSIZE_OLDBSD_64 (8 + 8 + 4 + 4)
59 #else
60 #define GMON_HDRSIZE_OLDBSD_64 (8 + 8 + 4)
61 #endif
63 #if 0 /* For documentation purposes only. */
64 struct old_raw_phdr
66 char low_pc[sizeof(void *)]; /* base pc address of sample buffer */
67 char high_pc[sizeof(void *)];/* max pc address of sampled buffer */
68 char ncnt[4]; /* size of sample buffer (plus this
69 header) */
70 #if defined (__alpha__) && defined (__osf__)
72 * DEC's OSF v3.0 uses 4 bytes of padding to bring the header to
73 * a size that is a multiple of 8.
75 char pad[4];
76 #endif
78 #endif
81 * Histogram counters are unsigned shorts:
83 #define HISTCOUNTER unsigned short
86 * Fraction of text space to allocate for histogram counters here, 1/2:
88 #define HISTFRACTION 2
91 * Fraction of text space to allocate for from hash buckets. The
92 * value of HASHFRACTION is based on the minimum number of bytes of
93 * separation between two subroutine call points in the object code.
94 * Given MIN_SUBR_SEPARATION bytes of separation the value of
95 * HASHFRACTION is calculated as:
97 * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
99 * For the VAX, the shortest two call sequence is:
101 * calls $0,(r0)
102 * calls $0,(r0)
104 * which is separated by only three bytes, thus HASHFRACTION is
105 * calculated as:
107 * HASHFRACTION = 3 / (2 * 2 - 1) = 1
109 * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
110 * is less than three, this algorithm will not work!
112 #define HASHFRACTION 1
115 * Percent of text space to allocate for tostructs with a minimum:
117 #define ARCDENSITY 2
118 #define MINARCS 50
120 struct tostruct
122 char *selfpc;
123 int count;
124 unsigned short link;
128 * A raw arc, with pointers to the calling site and the called site
129 * and a count. Everything is defined in terms of characters so
130 * as to get a packed representation (otherwise, different compilers
131 * might introduce different padding):
133 #if 0 /* For documentation purposes only. */
134 struct raw_arc
136 char from_pc[sizeof(void *)];
137 char self_pc[sizeof(void *)];
138 char count[sizeof(long)];
140 #endif
143 * General rounding functions:
145 #define ROUNDDOWN(x,y) (((x)/(y))*(y))
146 #define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
148 #endif /* gmon_h */