1 /*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/param.h> 31 #include <dlfcn.h> 32 #include <stdbool.h> 33 #include <stdio.h> 34 #include <string.h> 35 #include <sysdecode.h> 36 #include "rtld_utrace.h" 37 38 #ifdef __LP64__ 39 struct utrace_rtld32 { 40 char sig[4]; 41 int event; 42 uint32_t handle; 43 uint32_t mapbase; 44 uint32_t mapsize; 45 int refcnt; 46 char name[MAXPATHLEN]; 47 }; 48 #endif 49 50 static int 51 print_utrace_rtld(FILE *fp, void *p) 52 { 53 struct utrace_rtld *ut = p; 54 void *parent; 55 int mode; 56 57 switch (ut->event) { 58 case UTRACE_DLOPEN_START: 59 mode = ut->refcnt; 60 fprintf(fp, "dlopen(%s, ", ut->name); 61 switch (mode & RTLD_MODEMASK) { 62 case RTLD_NOW: 63 fprintf(fp, "RTLD_NOW"); 64 break; 65 case RTLD_LAZY: 66 fprintf(fp, "RTLD_LAZY"); 67 break; 68 default: 69 fprintf(fp, "%#x", mode & RTLD_MODEMASK); 70 } 71 if (mode & RTLD_GLOBAL) 72 fprintf(fp, " | RTLD_GLOBAL"); 73 if (mode & RTLD_TRACE) 74 fprintf(fp, " | RTLD_TRACE"); 75 if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE)) 76 fprintf(fp, " | %#x", mode & 77 ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE)); 78 fprintf(fp, ")"); 79 break; 80 case UTRACE_DLOPEN_STOP: 81 fprintf(fp, "%p = dlopen(%s) ref %d", ut->handle, ut->name, 82 ut->refcnt); 83 break; 84 case UTRACE_DLCLOSE_START: 85 fprintf(fp, "dlclose(%p) (%s, %d)", ut->handle, ut->name, 86 ut->refcnt); 87 break; 88 case UTRACE_DLCLOSE_STOP: 89 fprintf(fp, "dlclose(%p) finished", ut->handle); 90 break; 91 case UTRACE_LOAD_OBJECT: 92 fprintf(fp, "RTLD: loaded %p @ %p - %p (%s)", ut->handle, 93 ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1, 94 ut->name); 95 break; 96 case UTRACE_UNLOAD_OBJECT: 97 fprintf(fp, "RTLD: unloaded %p @ %p - %p (%s)", ut->handle, 98 ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1, 99 ut->name); 100 break; 101 case UTRACE_ADD_RUNDEP: 102 parent = ut->mapbase; 103 fprintf(fp, "RTLD: %p now depends on %p (%s, %d)", parent, 104 ut->handle, ut->name, ut->refcnt); 105 break; 106 case UTRACE_PRELOAD_FINISHED: 107 fprintf(fp, "RTLD: LD_PRELOAD finished"); 108 break; 109 case UTRACE_INIT_CALL: 110 fprintf(fp, "RTLD: init %p for %p (%s)", ut->mapbase, ut->handle, 111 ut->name); 112 break; 113 case UTRACE_FINI_CALL: 114 fprintf(fp, "RTLD: fini %p for %p (%s)", ut->mapbase, ut->handle, 115 ut->name); 116 break; 117 case UTRACE_DLSYM_START: 118 fprintf(fp, "RTLD: dlsym(%p, %s)", ut->handle, ut->name); 119 break; 120 case UTRACE_DLSYM_STOP: 121 fprintf(fp, "RTLD: %p = dlsym(%p, %s)", ut->mapbase, ut->handle, 122 ut->name); 123 break; 124 case UTRACE_RTLD_ERROR: 125 fprintf(fp, "RTLD: error: %s\n", ut->name); 126 break; 127 128 default: 129 return (0); 130 } 131 return (1); 132 } 133 134 struct utrace_malloc { 135 void *p; 136 size_t s; 137 void *r; 138 }; 139 140 #ifdef __LP64__ 141 struct utrace_malloc32 { 142 uint32_t p; 143 uint32_t s; 144 uint32_t r; 145 }; 146 #endif 147 148 static void 149 print_utrace_malloc(FILE *fp, void *p) 150 { 151 struct utrace_malloc *ut = p; 152 153 if (ut->p == (void *)(intptr_t)(-1)) 154 fprintf(fp, "malloc_init()"); 155 else if (ut->s == 0) 156 fprintf(fp, "free(%p)", ut->p); 157 else if (ut->p == NULL) 158 fprintf(fp, "%p = malloc(%zu)", ut->r, ut->s); 159 else 160 fprintf(fp, "%p = realloc(%p, %zu)", ut->r, ut->p, ut->s); 161 } 162 163 int 164 sysdecode_utrace(FILE *fp, void *p, size_t len) 165 { 166 #ifdef __LP64__ 167 struct utrace_rtld ur; 168 struct utrace_rtld32 *pr; 169 struct utrace_malloc um; 170 struct utrace_malloc32 *pm; 171 #endif 172 static const char rtld_utrace_sig[RTLD_UTRACE_SIG_SZ] = RTLD_UTRACE_SIG; 173 174 if (len == sizeof(struct utrace_rtld) && bcmp(p, rtld_utrace_sig, 175 sizeof(rtld_utrace_sig)) == 0) 176 return (print_utrace_rtld(fp, p)); 177 178 if (len == sizeof(struct utrace_malloc)) { 179 print_utrace_malloc(fp, p); 180 return (1); 181 } 182 183 #ifdef __LP64__ 184 if (len == sizeof(struct utrace_rtld32) && bcmp(p, rtld_utrace_sig, 185 sizeof(rtld_utrace_sig)) == 0) { 186 pr = p; 187 memset(&ur, 0, sizeof(ur)); 188 memcpy(ur.sig, pr->sig, sizeof(ur.sig)); 189 ur.event = pr->event; 190 ur.handle = (void *)(uintptr_t)pr->handle; 191 ur.mapbase = (void *)(uintptr_t)pr->mapbase; 192 ur.mapsize = pr->mapsize; 193 ur.refcnt = pr->refcnt; 194 memcpy(ur.name, pr->name, sizeof(ur.name)); 195 return (print_utrace_rtld(fp, &ur)); 196 } 197 198 if (len == sizeof(struct utrace_malloc32)) { 199 pm = p; 200 memset(&um, 0, sizeof(um)); 201 um.p = pm->p == (uint32_t)-1 ? (void *)(intptr_t)-1 : 202 (void *)(uintptr_t)pm->p; 203 um.s = pm->s; 204 um.r = (void *)(uintptr_t)pm->r; 205 print_utrace_malloc(fp, &um); 206 return (1); 207 } 208 #endif 209 210 return (0); 211 } 212