xref: /illumos-gate/usr/src/cmd/sgs/link_audit/common/dumpbind.c (revision 6a634c9dca3093f3922e4b7ab826d7bdf17bf78e)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 #include	<stdlib.h>
26 #include	<unistd.h>
27 #include	<sys/types.h>
28 #include	<sys/stat.h>
29 #include	<sys/lwp.h>
30 #include	<fcntl.h>
31 #include	<stdio.h>
32 #include	<sys/mman.h>
33 #include	<synch.h>
34 #include	<errno.h>
35 
36 #include	"bindings.h"
37 
38 void
usage()39 usage()
40 {
41 	(void) printf("usage: dumpbind [-pqsc] <bindings.data>\n");
42 	(void) printf("\t-p\tdisplay output in parsable format\n");
43 	(void) printf("\t-q\tquery all mutex_locks in data buffer\n");
44 	(void) printf("\t-c\tclear all mutex_locks in data buffer\n");
45 	(void) printf("\t-s\tset all mutex_locks in data buffer\n");
46 	(void) printf("\t-b\tprint bucket usage statistics\n");
47 }
48 
49 /*
50  * Returns 1 if lock held - 0 otherwise.
51  */
52 static int
query_lock(lwp_mutex_t * lock)53 query_lock(lwp_mutex_t *lock) {
54 	if (_lwp_mutex_trylock(lock) == 0) {
55 		(void) _lwp_mutex_unlock(lock);
56 		return (0);
57 	} else
58 		return (1);
59 }
60 
61 static void
query_buffer_locks(bindhead * bhp)62 query_buffer_locks(bindhead * bhp)
63 {
64 	int	i, bkt_locks_held = 0;
65 
66 	(void) printf("bh_strlock: ");
67 	if (query_lock(&bhp->bh_strlock) == 1)
68 		(void) printf("lock held\n");
69 	else
70 		(void) printf("free\n");
71 
72 	(void) printf("bh_lock: ");
73 	if (query_lock(&bhp->bh_lock) == 1)
74 		(void) printf("lock held\n");
75 	else
76 		(void) printf("free\n");
77 
78 	(void) printf("Buckets: %d - locks held:\n", bhp->bh_bktcnt);
79 	for (i = 0; i < bhp->bh_bktcnt; i++) {
80 		if (query_lock(&bhp->bh_bkts[i].bb_lock) == 1) {
81 			bkt_locks_held++;
82 			(void) printf("\tbkt[%d]: lock held\n", i);
83 		}
84 	}
85 	if (bkt_locks_held == 0)
86 		(void) printf("\tnone.\n");
87 	else
88 		(void) printf("\t[%d bucket(s) locked]\n", bkt_locks_held);
89 }
90 
91 static void
clear_buffer_locks(bindhead * bhp)92 clear_buffer_locks(bindhead * bhp)
93 {
94 	int	i;
95 
96 	if (query_lock(&bhp->bh_strlock) == 1) {
97 		(void) _lwp_mutex_unlock(&bhp->bh_strlock);
98 		(void) printf("bh_strlock: cleared\n");
99 	}
100 	if (query_lock(&bhp->bh_lock) == 1) {
101 		(void) _lwp_mutex_unlock(&bhp->bh_lock);
102 		(void) printf("bh_lock: cleared\n");
103 	}
104 	for (i = 0; i < bhp->bh_bktcnt; i++) {
105 		if (query_lock(&bhp->bh_bkts[i].bb_lock) == 1) {
106 			(void) _lwp_mutex_unlock(&bhp->bh_bkts[i].bb_lock);
107 			(void) printf("bkt[%d]: lock cleared\n", i);
108 		}
109 	}
110 }
111 
112 static void
set_buffer_locks(bindhead * bhp)113 set_buffer_locks(bindhead * bhp)
114 {
115 	int	i;
116 
117 	for (i = 0; i < bhp->bh_bktcnt; i++)
118 		(void) _lwp_mutex_lock(&bhp->bh_bkts[i].bb_lock);
119 
120 	(void) _lwp_mutex_lock(&bhp->bh_strlock);
121 	(void) _lwp_mutex_lock(&bhp->bh_lock);
122 }
123 
124 int
main(int argc,char ** argv)125 main(int argc, char **argv)
126 {
127 	int		fd;
128 	char		*fname, *format_string;
129 	bindhead	*bhp, *tmp_bhp;
130 	int		i, c;
131 	int		bflag = 0, pflag = 0, qflag = 0, cflag = 0, sflag = 0;
132 	ulong_t		symcount, callcount;
133 
134 	while ((c = getopt(argc, argv, "bspcq")) != EOF)
135 		switch (c) {
136 		case 'b':
137 			bflag++;
138 			break;
139 		case 'p':
140 			pflag++;
141 			break;
142 		case 'q':
143 			qflag++;
144 			break;
145 		case 'c':
146 			cflag++;
147 			break;
148 		case 's':
149 			sflag++;
150 			break;
151 		case '?':
152 			usage();
153 			return (1);
154 		}
155 
156 	if (optind == argc) {
157 		usage();
158 		return (1);
159 	}
160 	fname = argv[optind];
161 	if ((fd = open(fname, O_RDWR)) == -1) {
162 		(void) fprintf(stderr,
163 		    "dumpbindings: unable to open file: %s\n", fname);
164 		perror("open");
165 		return (1);
166 	}
167 	/* LINTED */
168 	if ((bhp = (bindhead *)mmap(0, sizeof (bindhead),
169 	    (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0)) == MAP_FAILED) {
170 		(void) fprintf(stderr, "dumpbind: mmap failed\n");
171 		perror("mmap");
172 		return (1);
173 	}
174 
175 	if (qflag) {
176 		query_buffer_locks(bhp);
177 		return (0);
178 	}
179 
180 	if (cflag) {
181 		clear_buffer_locks(bhp);
182 		return (0);
183 	}
184 	if (sflag) {
185 		set_buffer_locks(bhp);
186 		return (0);
187 	}
188 
189 	/* LINTED */
190 	if ((tmp_bhp = (bindhead *)mmap(0, bhp->bh_size,
191 	    (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0)) == MAP_FAILED) {
192 		(void) fprintf(stderr, "dumpbind: remap: mmap failed\n");
193 		perror("mmap");
194 		return (1);
195 	}
196 	(void) close(fd);
197 
198 	(void) munmap((void *)bhp, sizeof (bindhead));
199 	bhp = tmp_bhp;
200 
201 	if (pflag)
202 		format_string = "%s|%s|%8d\n";
203 	else {
204 		if (!bflag) {
205 			(void) printf("                           "
206 			    "Bindings Summary Report\n\n"
207 			    "Library                             Symbol"
208 			    "                   Call Count\n"
209 			    "----------------------------------------------"
210 			    "--------------------------\n");
211 		}
212 		format_string = "%-35s %-25s %5d\n";
213 	}
214 
215 	symcount = 0;
216 	callcount = 0;
217 	for (i = 0; i < bhp->bh_bktcnt; i++) {
218 		int		ent_cnt = 0;
219 		binding_entry *	bep;
220 		unsigned int	bep_off = bhp->bh_bkts[i].bb_head;
221 
222 		while (bep_off) {
223 			/* LINTED */
224 			bep = (binding_entry *)((char *)bhp + bep_off);
225 			if (!bflag) {
226 				/* LINTED */
227 				(void) printf(format_string,
228 				    (char *)bhp + bep->be_lib_name,
229 				    (char *)bhp + bep->be_sym_name,
230 				    bep->be_count);
231 				symcount++;
232 				callcount += bep->be_count;
233 			}
234 			bep_off = bep->be_next;
235 			ent_cnt++;
236 		}
237 		if (bflag)
238 			(void) printf("bkt[%d] - %d entries\n", i, ent_cnt);
239 	}
240 
241 	if (!bflag && !pflag) {
242 		(void) printf("----------------------------------------------"
243 		    "--------------------------\n"
244 		    "Symbol Count: %lu    Call Count: %lu\n\n",
245 		    symcount, callcount);
246 	}
247 	return (0);
248 }
249