1 /*
2 * Copyright (c) 2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Rui Paulo under sponsorship from the
6 * FreeBSD Foundation.
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.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <stdio.h>
34 #include <string.h>
35 #include <stdlib.h>
36 #include <rtld_db.h>
37 #include "libproc.h"
38 #include "_libproc.h"
39
40 static int
map_iter(const rd_loadobj_t * lop,void * arg)41 map_iter(const rd_loadobj_t *lop, void *arg)
42 {
43 struct proc_handle *phdl = arg;
44
45 if (phdl->nobjs >= phdl->rdobjsz) {
46 phdl->rdobjsz *= 2;
47 phdl->rdobjs = reallocf(phdl->rdobjs, sizeof(*phdl->rdobjs) *
48 phdl->rdobjsz);
49 if (phdl->rdobjs == NULL)
50 return (-1);
51 }
52 if (strcmp(lop->rdl_path, phdl->execname) == 0 &&
53 (lop->rdl_prot & RD_RDL_X) != 0)
54 phdl->rdexec = &phdl->rdobjs[phdl->nobjs];
55 memcpy(&phdl->rdobjs[phdl->nobjs++], lop, sizeof(*lop));
56
57 return (0);
58 }
59
60 rd_agent_t *
proc_rdagent(struct proc_handle * phdl)61 proc_rdagent(struct proc_handle *phdl)
62 {
63 if (phdl->rdap == NULL && phdl->status != PS_UNDEAD &&
64 phdl->status != PS_IDLE) {
65 if ((phdl->rdap = rd_new(phdl)) != NULL) {
66 phdl->rdobjs = malloc(sizeof(*phdl->rdobjs) * 64);
67 phdl->rdobjsz = 64;
68 if (phdl->rdobjs == NULL)
69 return (phdl->rdap);
70 rd_loadobj_iter(phdl->rdap, map_iter, phdl);
71 }
72 }
73
74 return (phdl->rdap);
75 }
76
77 void
proc_updatesyms(struct proc_handle * phdl)78 proc_updatesyms(struct proc_handle *phdl)
79 {
80
81 memset(phdl->rdobjs, 0, sizeof(*phdl->rdobjs) * phdl->rdobjsz);
82 phdl->nobjs = 0;
83 rd_loadobj_iter(phdl->rdap, map_iter, phdl);
84 }
85