comparison agent/src/os/solaris/proc/saproc_audit.cpp @ 892:a94af87c3357

6861984: solaris version of libsaproc.so should support SA_ALTROOT directly Reviewed-by: kvn, twisti
author never
date Fri, 24 Jul 2009 12:40:40 -0700
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-1:000000000000 0:6b344a8b3abe
1 /*
2 * Copyright 2009 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include <link.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <fcntl.h>
32 #include <limits.h>
33 #include <varargs.h>
34
35 // This class sets up an interposer on open calls from libproc.so to
36 // support a pathmap facility in the SA.
37
38 static uintptr_t* libproc_cookie;
39 static uintptr_t* libc_cookie;
40 static uintptr_t* libsaproc_cookie;
41
42
43 uint_t
44 la_version(uint_t version)
45 {
46 return (LAV_CURRENT);
47 }
48
49
50 uint_t
51 la_objopen(Link_map * lmp, Lmid_t lmid, uintptr_t * cookie)
52 {
53 if (strstr(lmp->l_name, "/libproc.so") != NULL) {
54 libproc_cookie = cookie;
55 return LA_FLG_BINDFROM;
56 }
57 if (strstr(lmp->l_name, "/libc.so") != NULL) {
58 libc_cookie = cookie;
59 return LA_FLG_BINDTO;
60 }
61 if (strstr(lmp->l_name, "/libsaproc.so") != NULL) {
62 libsaproc_cookie = cookie;
63 return LA_FLG_BINDTO | LA_FLG_BINDFROM;
64 }
65 return 0;
66 }
67
68
69 #if defined(_LP64)
70 uintptr_t
71 la_symbind64(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcook,
72 uintptr_t *defcook, uint_t *sb_flags, const char *sym_name)
73 #else
74 uintptr_t
75 la_symbind32(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcook,
76 uintptr_t *defcook, uint_t *sb_flags)
77 #endif
78 {
79 #if !defined(_LP64)
80 const char *sym_name = (const char *)symp->st_name;
81 #endif
82 if (strcmp(sym_name, "open") == 0 && refcook == libproc_cookie) {
83 // redirect all open calls from libproc.so through libsaproc_open which will
84 // try the alternate library locations first.
85 void* handle = dlmopen(LM_ID_BASE, "libsaproc.so", RTLD_NOLOAD);
86 if (handle == NULL) {
87 fprintf(stderr, "libsaproc_audit.so: didn't find libsaproc.so during linking\n");
88 } else {
89 uintptr_t libsaproc_open = (uintptr_t)dlsym(handle, "libsaproc_open");
90 if (libsaproc_open == 0) {
91 fprintf(stderr, "libsaproc_audit.so: didn't find libsaproc_open during linking\n");
92 } else {
93 return libsaproc_open;
94 }
95 }
96 }
97 return symp->st_value;
98 }