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/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)tahoe.c 1.5 (Berkeley) 6/1/90";
#endif /* not lint */
#include "gprof.h"
/*
* a namelist entry to be the child of indirect callf
*/
nltype indirectchild = {
"(*)" , /* the name */
(unsigned long) 0 , /* the pc entry point */
(unsigned long) 0 , /* entry point aligned to histogram */
(double) 0.0 , /* ticks in this routine */
(double) 0.0 , /* cumulative ticks in children */
(long) 0 , /* how many times called */
(long) 0 , /* how many calls to self */
(double) 1.0 , /* propagation fraction */
(double) 0.0 , /* self propagation time */
(double) 0.0 , /* child propagation time */
(bool) 0 , /* print flag */
(int) 0 , /* index in the graph list */
(int) 0 , /* graph call chain top-sort order */
(int) 0 , /* internal number of cycle on */
(struct nl *) &indirectchild , /* pointer to head of cycle */
(struct nl *) 0 , /* pointer to next member of cycle */
(arctype *) 0 , /* list of caller arcs */
(arctype *) 0 /* list of callee arcs */
};
int
iscall (unsigned char *ip) {
if (*ip == 0xeb || *ip == 0x9a)
return 1;
return 0;
}
findcall( parentp , p_lowpc , p_highpc )
nltype *parentp;
unsigned long p_lowpc;
unsigned long p_highpc;
{
unsigned char *instructp;
long length;
nltype *childp;
unsigned long destpc;
if ( textspace == 0 ) {
return;
}
if ( p_lowpc < s_lowpc ) {
p_lowpc = s_lowpc;
}
if ( p_highpc > s_highpc ) {
p_highpc = s_highpc;
}
# ifdef DEBUG
if ( debug & CALLDEBUG ) {
printf( "[findcall] %s: 0x%x to 0x%x\n" ,
parentp -> name , p_lowpc , p_highpc );
}
# endif DEBUG
for ( instructp = textspace + p_lowpc ;
instructp < textspace + p_highpc ;
instructp += length ) {
length = 1;
if ( iscall (instructp) ) {
# ifdef DEBUG
if ( debug & CALLDEBUG ) {
printf( "[findcall]\t0x%x:callf" , instructp - textspace );
}
# endif DEBUG
length = 4;
/*
* regular pc relative addressing
* check that this is the address of
* a function.
*/
destpc = ( (unsigned long)instructp + 5 - (unsigned long) textspace);
if ( destpc >= s_lowpc && destpc <= s_highpc ) {
childp = nllookup( destpc );
# ifdef DEBUG
if ( debug & CALLDEBUG ) {
printf( "[findcall]\tdestpc 0x%x" , destpc );
printf( " childp->name %s" , childp -> name );
printf( " childp->value 0x%x\n" ,
childp -> value );
}
# endif DEBUG
if ( childp -> value == destpc ) {
/*
* a hit
*/
addarc( parentp , childp , (long) 0 );
length += 4; /* constant lengths */
continue;
}
goto botched;
}
/*
* else:
* it looked like a callf,
* but it wasn't to anywhere.
*/
botched:
/*
* something funny going on.
*/
# ifdef DEBUG
if ( debug & CALLDEBUG ) {
printf( "[findcall]\tbut it's a botch\n" );
}
# endif DEBUG
length = 1;
continue;
}
}
}
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