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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "gprof.h"
/*
* look up an address in a sorted-by-address namelist
* this deals with misses by mapping them to the next lower
* entry point.
*/
static int searchmsg = 0; /* Emit the diagnostic only once */
nltype *
nllookup(mod_info_t *module, pctype address, pctype *nxtsym)
{
size_t low = 0, middle, high = module->nname - 1;
pctype keyval;
nltype *mnl = module->nl;
/*
* If this is the program executable in which we are looking up
* a symbol, then the actual load address will be the same as the
* address specified in the ELF file. For shared objects, the
* load address may differ from what is specified in the file. In
* this case, we may need to look for a different value altogether.
*/
keyval = module->txt_origin + (address - module->load_base);
if (keyval < mnl[low].value) {
if (nxtsym) {
*nxtsym = module->load_base +
(mnl[low].value - module->txt_origin);
}
return (NULL);
}
if (keyval >= mnl[high].value) {
if (nxtsym)
*nxtsym = module->load_end;
return (&mnl[high]);
}
while (low != high) {
middle = (high + low) >> 1;
if (mnl[middle].value <= keyval &&
mnl[middle + 1].value > keyval) {
if (nxtsym) {
*nxtsym = module->load_base +
(mnl[middle + 1].value -
module->txt_origin);
}
return (&mnl[middle]);
}
if (mnl[middle].value > keyval) {
high = middle;
} else {
low = middle + 1;
}
}
if (searchmsg++ == 0)
(void) fprintf(stderr, "[nllookup] binary search fails???\n");
/* must never reach here! */
return (0);
}
arctype *
arclookup(nltype *parentp, nltype *childp)
{
arctype *arcp;
if (parentp == 0 || childp == 0) {
(void) fprintf(stderr,
"[arclookup] parentp == 0 || childp == 0\n");
return (0);
}
#ifdef DEBUG
if (debug & LOOKUPDEBUG) {
(void) printf("[arclookup] parent %s child %s\n",
parentp->name, childp->name);
}
#endif /* DEBUG */
for (arcp = parentp->children; arcp; arcp = arcp->arc_childlist) {
#ifdef DEBUG
if (debug & LOOKUPDEBUG) {
(void) printf(
"[arclookup]\t arc_parent %s arc_child %s\n",
arcp->arc_parentp->name,
arcp->arc_childp->name);
}
#endif /* DEBUG */
if (arcp->arc_childp == childp) {
return (arcp);
}
}
return (0);
}
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