1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
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 * 4. 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.
16 *
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.
28 */
29
30 #if 0
31 #ifndef lint
32 static char sccsid[] = "@(#)lookup.c 8.1 (Berkeley) 6/6/93";
33 #endif /* not lint */
34 #endif
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: stable/9/usr.bin/gprof/lookup.c 216370 2010-12-11 08:32:16Z joel $");
38
39 #include "gprof.h"
40
41 /*
42 * look up an address in a sorted-by-address namelist
43 * this deals with misses by mapping them to the next lower
44 * entry point.
45 */
46 nltype *
nllookup(address)47 nllookup( address )
48 unsigned long address;
49 {
50 register long low;
51 register long middle;
52 register long high;
53 # ifdef DEBUG
54 register int probes;
55
56 probes = 0;
57 # endif /* DEBUG */
58 for ( low = 0 , high = nname - 1 ; low != high ; ) {
59 # ifdef DEBUG
60 probes += 1;
61 # endif /* DEBUG */
62 middle = ( high + low ) >> 1;
63 if ( nl[ middle ].value <= address && nl[ middle+1 ].value > address ) {
64 # ifdef DEBUG
65 if ( debug & LOOKUPDEBUG ) {
66 printf( "[nllookup] %d (%d) probes\n" , probes , nname-1 );
67 }
68 # endif /* DEBUG */
69 return &nl[ middle ];
70 }
71 if ( nl[ middle ].value > address ) {
72 high = middle;
73 } else {
74 low = middle + 1;
75 }
76 }
77 # ifdef DEBUG
78 if ( debug & LOOKUPDEBUG ) {
79 fprintf( stderr , "[nllookup] (%d) binary search fails\n" ,
80 nname-1 );
81 }
82 # endif /* DEBUG */
83 return 0;
84 }
85
86 arctype *
arclookup(parentp,childp)87 arclookup( parentp , childp )
88 nltype *parentp;
89 nltype *childp;
90 {
91 arctype *arcp;
92
93 if ( parentp == 0 || childp == 0 ) {
94 fprintf( stderr, "[arclookup] parentp == 0 || childp == 0\n" );
95 return 0;
96 }
97 # ifdef DEBUG
98 if ( debug & LOOKUPDEBUG ) {
99 printf( "[arclookup] parent %s child %s\n" ,
100 parentp -> name , childp -> name );
101 }
102 # endif /* DEBUG */
103 for ( arcp = parentp -> children ; arcp ; arcp = arcp -> arc_childlist ) {
104 # ifdef DEBUG
105 if ( debug & LOOKUPDEBUG ) {
106 printf( "[arclookup]\t arc_parent %s arc_child %s\n" ,
107 arcp -> arc_parentp -> name ,
108 arcp -> arc_childp -> name );
109 }
110 # endif /* DEBUG */
111 if ( arcp -> arc_childp == childp ) {
112 return arcp;
113 }
114 }
115 return 0;
116 }
117