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annotate agent/src/os/solaris/proc/saproc_audit.cpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents c18cbe5936b8
children
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1 /*
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2 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include <link.h>
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26 #include <stdio.h>
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27 #include <stdlib.h>
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28 #include <string.h>
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29 #include <sys/types.h>
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30 #include <sys/stat.h>
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31 #include <fcntl.h>
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32 #include <limits.h>
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33 #include <varargs.h>
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34
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35 // This class sets up an interposer on open calls from libproc.so to
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36 // support a pathmap facility in the SA.
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37
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38 static uintptr_t* libproc_cookie;
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39 static uintptr_t* libc_cookie;
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40 static uintptr_t* libsaproc_cookie;
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41
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42
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43 uint_t
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44 la_version(uint_t version)
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45 {
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46 return (LAV_CURRENT);
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47 }
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48
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49
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50 uint_t
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51 la_objopen(Link_map * lmp, Lmid_t lmid, uintptr_t * cookie)
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52 {
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53 if (strstr(lmp->l_name, "/libproc.so") != NULL) {
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54 libproc_cookie = cookie;
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55 return LA_FLG_BINDFROM;
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56 }
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57 if (strstr(lmp->l_name, "/libc.so") != NULL) {
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58 libc_cookie = cookie;
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59 return LA_FLG_BINDTO;
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60 }
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61 if (strstr(lmp->l_name, "/libsaproc.so") != NULL) {
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62 libsaproc_cookie = cookie;
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63 return LA_FLG_BINDTO | LA_FLG_BINDFROM;
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64 }
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65 return 0;
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66 }
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67
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68
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69 #if defined(_LP64)
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70 uintptr_t
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71 la_symbind64(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcook,
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72 uintptr_t *defcook, uint_t *sb_flags, const char *sym_name)
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73 #else
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74 uintptr_t
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75 la_symbind32(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcook,
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76 uintptr_t *defcook, uint_t *sb_flags)
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77 #endif
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78 {
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79 #if !defined(_LP64)
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80 const char *sym_name = (const char *)symp->st_name;
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81 #endif
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82 if (strcmp(sym_name, "open") == 0 && refcook == libproc_cookie) {
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83 // redirect all open calls from libproc.so through libsaproc_open which will
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84 // try the alternate library locations first.
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85 void* handle = dlmopen(LM_ID_BASE, "libsaproc.so", RTLD_NOLOAD);
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86 if (handle == NULL) {
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87 fprintf(stderr, "libsaproc_audit.so: didn't find libsaproc.so during linking\n");
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88 } else {
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89 uintptr_t libsaproc_open = (uintptr_t)dlsym(handle, "libsaproc_open");
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90 if (libsaproc_open == 0) {
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91 fprintf(stderr, "libsaproc_audit.so: didn't find libsaproc_open during linking\n");
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92 } else {
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93 return libsaproc_open;
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94 }
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95 }
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96 }
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97 return symp->st_value;
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98 }