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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <stdio.h> 28 #include <stdarg.h> 29 #include <strings.h> 30 #include <dlfcn.h> 31 #include <debug.h> 32 #include "msg.h" 33 34 /* 35 * dbg_setup() can be called a number of times. The typical use through 36 * LD_OPTIONS, results in dbg_setup() being called as the first argument to 37 * ld(1). It's also possible to pass debugging tokens through the compiler, 38 * for example -Wl,-Dlibs -Wl-Ddetail, in which case multiple dbg_setup() 39 * calls are made. 40 * 41 * A distinction is also made between diagnostics being requested before any 42 * other ld(1) options are read, or whether the debugging options occur 43 * between other options on the command line. In the latter case, the 44 * debugging options can be used to isolate diagnostics around one or more 45 * input files. The "phase" argument allows us to select which phase of 46 * dbg_setup() processing we should isolate ourselves to. 47 * 48 * dbg_print() can require the output filename for use in the diagnostics 49 * created. Save the address of the output filename pointer for this use. 50 */ 51 static const char **Name = NULL; 52 static int Phase = 0; 53 54 uintptr_t 55 dbg_setup(const char *options, Dbg_desc *dbp, const char **name, int phase) 56 { 57 if (Phase == 0) 58 Phase = phase; 59 else if (Phase != phase) 60 return (0); 61 62 Name = name; 63 64 /* 65 * Call the debugging setup routine to initialize the mask and 66 * debug function array. 67 */ 68 return (Dbg_setup(options, dbp)); 69 } 70 71 /* PRINTFLIKE2 */ 72 void 73 dbg_print(Lm_list *lml, const char *format, ...) 74 { 75 static char *prestr = NULL; 76 va_list args; 77 78 #if defined(lint) 79 /* 80 * The lml argument is only meaningful for diagnostics sent to ld.so.1. 81 * Supress the lint error by making a dummy assignment. 82 */ 83 lml = NULL; 84 #endif 85 /* 86 * Knock off any newline indicator to signify that a diagnostic has 87 * been processed. 88 */ 89 dbg_desc->d_extra &= ~DBG_E_STDNL; 90 91 if (DBG_ISSNAME()) { 92 /* 93 * If the debugging options have requested each diagnostic line 94 * be prepended by a name create a prefix string. 95 */ 96 if ((prestr == NULL) && *Name) { 97 const char *name, *cls; 98 size_t len; 99 100 /* 101 * Select the fullname or basename of the output file 102 * being created. 103 */ 104 if (DBG_ISFNAME()) 105 name = *Name; 106 else { 107 if ((name = 108 strrchr(*Name, '/')) == NULL) 109 name = *Name; 110 else 111 name++; 112 } 113 len = strlen(name) + 114 strlen(MSG_INTL(MSG_DBG_NAME_FMT)) + 1; 115 116 /* 117 * Add the output file class if required. 118 */ 119 if (DBG_ISCLASS()) { 120 #if defined(_ELF64) 121 len += MSG_DBG_CLS64_FMT_SIZE; 122 cls = MSG_ORIG(MSG_DBG_CLS64_FMT); 123 #else 124 len += MSG_DBG_CLS32_FMT_SIZE; 125 cls = MSG_ORIG(MSG_DBG_CLS32_FMT); 126 #endif 127 } 128 129 /* 130 * Allocate a string to build the prefix. 131 */ 132 if ((prestr = libld_malloc(len)) == NULL) 133 prestr = (char *)MSG_INTL(MSG_DBG_DFLT_FMT); 134 else { 135 (void) snprintf(prestr, len, 136 MSG_INTL(MSG_DBG_NAME_FMT), name); 137 if (DBG_ISCLASS()) 138 (void) strcat(prestr, cls); 139 } 140 } 141 if (prestr) 142 (void) fputs(prestr, stderr); 143 else 144 (void) fputs(MSG_INTL(MSG_DBG_AOUT_FMT), stderr); 145 } else 146 (void) fputs(MSG_INTL(MSG_DBG_DFLT_FMT), stderr); 147 148 va_start(args, format); 149 (void) vfprintf(stderr, format, args); 150 (void) fprintf(stderr, MSG_ORIG(MSG_STR_NL)); 151 va_end(args); 152 } 153