dumpbind.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/lwp.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.h>
#include <synch.h>
#include <errno.h>
#include "bindings.h"
void
usage()
{
(void) printf("usage: dumpbind [-pqsc] <bindings.data>\n");
(void) printf("\t-p\tdisplay output in parsable format\n");
(void) printf("\t-q\tquery all mutex_locks in data buffer\n");
(void) printf("\t-c\tclear all mutex_locks in data buffer\n");
(void) printf("\t-s\tset all mutex_locks in data buffer\n");
(void) printf("\t-b\tprint bucket usage statistics\n");
}
/*
* Returns 1 if lock held - 0 otherwise.
*/
static int
query_lock(lwp_mutex_t *lock) {
if (_lwp_mutex_trylock(lock) == 0) {
(void) _lwp_mutex_unlock(lock);
return (0);
} else
return (1);
}
static void
query_buffer_locks(bindhead * bhp)
{
int i, bkt_locks_held = 0;
(void) printf("bh_strlock: ");
if (query_lock(&bhp->bh_strlock) == 1)
(void) printf("lock held\n");
else
(void) printf("free\n");
(void) printf("bh_lock: ");
if (query_lock(&bhp->bh_lock) == 1)
(void) printf("lock held\n");
else
(void) printf("free\n");
(void) printf("Buckets: %d - locks held:\n", bhp->bh_bktcnt);
for (i = 0; i < bhp->bh_bktcnt; i++) {
if (query_lock(&bhp->bh_bkts[i].bb_lock) == 1) {
bkt_locks_held++;
(void) printf("\tbkt[%d]: lock held\n", i);
}
}
if (bkt_locks_held == 0)
(void) printf("\tnone.\n");
else
(void) printf("\t[%d bucket(s) locked]\n", bkt_locks_held);
}
static void
clear_buffer_locks(bindhead * bhp)
{
int i;
if (query_lock(&bhp->bh_strlock) == 1) {
(void) _lwp_mutex_unlock(&bhp->bh_strlock);
(void) printf("bh_strlock: cleared\n");
}
if (query_lock(&bhp->bh_lock) == 1) {
(void) _lwp_mutex_unlock(&bhp->bh_lock);
(void) printf("bh_lock: cleared\n");
}
for (i = 0; i < bhp->bh_bktcnt; i++) {
if (query_lock(&bhp->bh_bkts[i].bb_lock) == 1) {
(void) _lwp_mutex_unlock(&bhp->bh_bkts[i].bb_lock);
(void) printf("bkt[%d]: lock cleared\n", i);
}
}
}
static void
set_buffer_locks(bindhead * bhp)
{
int i;
for (i = 0; i < bhp->bh_bktcnt; i++)
(void) _lwp_mutex_lock(&bhp->bh_bkts[i].bb_lock);
(void) _lwp_mutex_lock(&bhp->bh_strlock);
(void) _lwp_mutex_lock(&bhp->bh_lock);
}
int
main(int argc, char **argv)
{
int fd;
char *fname, *format_string;
bindhead *bhp, *tmp_bhp;
int i, c;
int bflag = 0, pflag = 0, qflag = 0, cflag = 0, sflag = 0;
ulong_t symcount, callcount;
while ((c = getopt(argc, argv, "bspcq")) != EOF)
switch (c) {
case 'b':
bflag++;
break;
case 'p':
pflag++;
break;
case 'q':
qflag++;
break;
case 'c':
cflag++;
break;
case 's':
sflag++;
break;
case '?':
usage();
return (1);
}
if (optind == argc) {
usage();
return (1);
}
fname = argv[optind];
if ((fd = open(fname, O_RDWR)) == -1) {
(void) fprintf(stderr,
"dumpbindings: unable to open file: %s\n", fname);
perror("open");
return (1);
}
/* LINTED */
if ((bhp = (bindhead *)mmap(0, sizeof (bindhead),
(PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0)) == MAP_FAILED) {
(void) fprintf(stderr, "dumpbind: mmap failed\n");
perror("mmap");
return (1);
}
if (qflag) {
query_buffer_locks(bhp);
return (0);
}
if (cflag) {
clear_buffer_locks(bhp);
return (0);
}
if (sflag) {
set_buffer_locks(bhp);
return (0);
}
/* LINTED */
if ((tmp_bhp = (bindhead *)mmap(0, bhp->bh_size,
(PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0)) == MAP_FAILED) {
(void) fprintf(stderr, "dumpbind: remap: mmap failed\n");
perror("mmap");
return (1);
}
(void) close(fd);
(void) munmap((void *)bhp, sizeof (bindhead));
bhp = tmp_bhp;
if (pflag)
format_string = "%s|%s|%8d\n";
else {
if (!bflag)
(void) printf(
" Bindings Summary Report\n\n"
"Library Symbol"
" Call Count\n"
"----------------------------------------------"
"--------------------------\n");
format_string = "%-35s %-25s %5d\n";
}
symcount = 0;
callcount = 0;
for (i = 0; i < bhp->bh_bktcnt; i++) {
int ent_cnt = 0;
binding_entry * bep;
unsigned int bep_off = bhp->bh_bkts[i].bb_head;
while (bep_off) {
/* LINTED */
bep = (binding_entry *)((char *)bhp + bep_off);
if (!bflag) {
/* LINTED */
(void) printf(format_string,
(char *)bhp + bep->be_lib_name,
(char *)bhp + bep->be_sym_name,
bep->be_count);
symcount++;
callcount += bep->be_count;
}
bep_off = bep->be_next;
ent_cnt++;
}
if (bflag)
(void) printf("bkt[%d] - %d entries\n", i, ent_cnt);
}
if (!bflag && !pflag)
(void) printf(
"----------------------------------------------"
"--------------------------\n"
"Symbol Count: %lu Call Count: %lu\n\n",
symcount, callcount);
return (0);
}