Return to lookup.c CVS log

Up to [local] / src / usr.bin / gprof

Annotation of src/usr.bin/gprof/lookup.c, Revision 1.8

1.8     ! deraadt     1: /*     $OpenBSD: lookup.c,v 1.7 2006/03/25 19:06:36 espie Exp $        */
1.1       deraadt     2: /*     $NetBSD: lookup.c,v 1.5 1995/04/19 07:16:06 cgd Exp $   */
                      3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
1.6       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #include "gprof.h"
                     34:
                     35:     /*
                     36:      * look up an address in a sorted-by-address namelist
                     37:      *     this deals with misses by mapping them to the next lower
                     38:      *     entry point.
                     39:      */
                     40: nltype *
1.7       espie      41: nllookup(unsigned long address)
1.1       deraadt    42: {
1.4       mpech      43:     long       low;
                     44:     long       middle;
                     45:     long       high;
1.1       deraadt    46: #   ifdef DEBUG
1.4       mpech      47:        int     probes;
1.1       deraadt    48:
                     49:        probes = 0;
1.5       danh       50: #   endif /* DEBUG */
1.1       deraadt    51:     for ( low = 0 , high = nname - 1 ; low != high ; ) {
                     52: #      ifdef DEBUG
                     53:            probes += 1;
1.5       danh       54: #      endif /* DEBUG */
1.1       deraadt    55:        middle = ( high + low ) >> 1;
                     56:        if ( nl[ middle ].value <= address && nl[ middle+1 ].value > address ) {
                     57: #          ifdef DEBUG
                     58:                if ( debug & LOOKUPDEBUG ) {
                     59:                    printf( "[nllookup] %d (%d) probes\n" , probes , nname-1 );
                     60:                }
1.5       danh       61: #          endif /* DEBUG */
1.1       deraadt    62:            return &nl[ middle ];
                     63:        }
                     64:        if ( nl[ middle ].value > address ) {
                     65:            high = middle;
                     66:        } else {
                     67:            low = middle + 1;
                     68:        }
                     69:     }
                     70: #   ifdef DEBUG
1.3       mickey     71:        if ( debug & LOOKUPDEBUG )
                     72:            warnx("[nllookup] (%d) binary search fails", nname - 1);
1.5       danh       73: #   endif /* DEBUG */
1.1       deraadt    74:     return 0;
                     75: }
                     76:
                     77: arctype *
1.7       espie      78: arclookup(nltype *parentp, nltype *childp)
1.1       deraadt    79: {
                     80:     arctype    *arcp;
                     81:
                     82:     if ( parentp == 0 || childp == 0 ) {
1.3       mickey     83:        warnx("[arclookup] parentp == 0 || childp == 0");
1.1       deraadt    84:        return 0;
                     85:     }
                     86: #   ifdef DEBUG
                     87:        if ( debug & LOOKUPDEBUG ) {
                     88:            printf( "[arclookup] parent %s child %s\n" ,
                     89:                    parentp -> name , childp -> name );
                     90:        }
1.5       danh       91: #   endif /* DEBUG */
1.1       deraadt    92:     for ( arcp = parentp -> children ; arcp ; arcp = arcp -> arc_childlist ) {
                     93: #      ifdef DEBUG
                     94:            if ( debug & LOOKUPDEBUG ) {
                     95:                printf( "[arclookup]\t arc_parent %s arc_child %s\n" ,
                     96:                        arcp -> arc_parentp -> name ,
                     97:                        arcp -> arc_childp -> name );
                     98:            }
1.5       danh       99: #      endif /* DEBUG */
1.1       deraadt   100:        if ( arcp -> arc_childp == childp ) {
                    101:            return arcp;
                    102:        }
                    103:     }
                    104:     return 0;
                    105: }