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 /* 28 * Copyright (c) 2012 by Delphix. All rights reserved. 29 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 30 */ 31 32 #include <strings.h> 33 #include <dt_impl.h> 34 35 static const struct { 36 int err; 37 const char *msg; 38 } _dt_errlist[] = { 39 { EDT_VERSION, "Client requested version newer than library" }, 40 { EDT_VERSINVAL, "Version is not properly formatted or is too large" }, 41 { EDT_VERSUNDEF, "Requested version is not supported by compiler" }, 42 { EDT_VERSREDUCED, "Requested version conflicts with earlier setting" }, 43 { EDT_CTF, "Unexpected libctf error" }, 44 { EDT_COMPILER, "Error in D program compilation" }, 45 { EDT_NOTUPREG, "Insufficient tuple registers to generate code" }, 46 { EDT_NOMEM, "Memory allocation failure" }, 47 { EDT_INT2BIG, "Integer constant table limit exceeded" }, 48 { EDT_STR2BIG, "String constant table limit exceeded" }, 49 { EDT_NOMOD, "Unknown module name" }, 50 { EDT_NOPROV, "Unknown provider name" }, 51 { EDT_NOPROBE, "No probe matches description" }, 52 { EDT_NOSYM, "Unknown symbol name" }, 53 { EDT_NOSYMADDR, "No symbol corresponds to address" }, 54 { EDT_NOTYPE, "Unknown type name" }, 55 { EDT_NOVAR, "Unknown variable name" }, 56 { EDT_NOAGG, "Unknown aggregation name" }, 57 { EDT_BADSCOPE, "Improper use of scoping operator in type name" }, 58 { EDT_BADSPEC, "Overspecified probe description" }, 59 { EDT_BADSPCV, "Undefined macro variable in probe description" }, 60 { EDT_BADID, "Unknown probe identifier" }, 61 { EDT_NOTLOADED, "Module is no longer loaded" }, 62 { EDT_NOCTF, "Module does not contain any CTF data" }, 63 { EDT_DATAMODEL, "Module and program data models do not match" }, 64 { EDT_DIFVERS, "Library uses newer DIF version than kernel" }, 65 { EDT_BADAGG, "Unknown aggregating action" }, 66 { EDT_FIO, "Error occurred while reading from input stream" }, 67 { EDT_DIFINVAL, "DIF program content is invalid" }, 68 { EDT_DIFSIZE, "DIF program exceeds maximum program size" }, 69 { EDT_DIFFAULT, "DIF program contains invalid pointer" }, 70 { EDT_BADPROBE, "Invalid probe specification" }, 71 { EDT_BADPGLOB, "Probe description has too many globbing characters" }, 72 { EDT_NOSCOPE, "Declaration scope stack underflow" }, 73 { EDT_NODECL, "Declaration stack underflow" }, 74 { EDT_DMISMATCH, "Data record list does not match statement" }, 75 { EDT_DOFFSET, "Data record offset exceeds buffer boundary" }, 76 { EDT_DALIGN, "Data record has inappropriate alignment" }, 77 { EDT_BADOPTNAME, "Invalid option name" }, 78 { EDT_BADOPTVAL, "Invalid value for specified option" }, 79 { EDT_BADOPTCTX, "Option cannot be used from within a D program" }, 80 { EDT_CPPFORK, "Failed to fork preprocessor" }, 81 { EDT_CPPEXEC, "Failed to exec preprocessor" }, 82 { EDT_CPPENT, "Preprocessor not found" }, 83 { EDT_CPPERR, "Preprocessor failed to process input program" }, 84 { EDT_SYMOFLOW, "Symbol table identifier space exhausted" }, 85 { EDT_ACTIVE, "Operation illegal when tracing is active" }, 86 { EDT_DESTRUCTIVE, "Destructive actions not allowed" }, 87 { EDT_NOANON, "No anonymous tracing state" }, 88 { EDT_ISANON, "Can't claim anonymous state and enable probes" }, 89 { EDT_ENDTOOBIG, "END enablings exceed size of principal buffer" }, 90 { EDT_NOCONV, "Failed to load type for printf conversion" }, 91 { EDT_BADCONV, "Incomplete printf conversion" }, 92 { EDT_BADERROR, "Invalid library ERROR action" }, 93 { EDT_ERRABORT, "Abort due to error" }, 94 { EDT_DROPABORT, "Abort due to drop" }, 95 { EDT_DIRABORT, "Abort explicitly directed" }, 96 { EDT_BADRVAL, "Invalid return value from callback" }, 97 { EDT_BADNORMAL, "Invalid normalization" }, 98 { EDT_BUFTOOSMALL, "Enabling exceeds size of buffer" }, 99 { EDT_BADTRUNC, "Invalid truncation" }, 100 { EDT_BUSY, "DTrace cannot be used when kernel debugger is active" }, 101 { EDT_ACCESS, "DTrace requires additional privileges" }, 102 { EDT_NOENT, "DTrace device not available on system" }, 103 { EDT_BRICKED, "Abort due to systemic unresponsiveness" }, 104 { EDT_HARDWIRE, "Failed to load language definitions" }, 105 { EDT_ELFVERSION, "libelf is out-of-date with respect to libdtrace" }, 106 { EDT_NOBUFFERED, "Attempt to buffer output without handler" }, 107 { EDT_UNSTABLE, "Description matched an unstable set of probes" }, 108 { EDT_BADSETOPT, "Invalid setopt() library action" }, 109 { EDT_BADSTACKPC, "Invalid stack program counter size" }, 110 { EDT_BADAGGVAR, "Invalid aggregation variable identifier" }, 111 { EDT_OVERSION, "Client requested deprecated version of library" }, 112 { EDT_ENABLING_ERR, "Failed to enable probe" }, 113 { EDT_NOPROBES, "No probe sites found for declared provider" }, 114 { EDT_CANTLOAD, "Failed to load module" }, 115 }; 116 117 static const int _dt_nerr = sizeof (_dt_errlist) / sizeof (_dt_errlist[0]); 118 119 const char * 120 dtrace_errmsg(dtrace_hdl_t *dtp, int error) 121 { 122 const char *str; 123 int i; 124 125 if (error == EDT_COMPILER && dtp != NULL && dtp->dt_errmsg[0] != '\0') 126 str = dtp->dt_errmsg; 127 else if (error == EDT_CTF && dtp != NULL && dtp->dt_ctferr != 0) 128 str = ctf_errmsg(dtp->dt_ctferr); 129 else if (error >= EDT_BASE && (error - EDT_BASE) < _dt_nerr) { 130 for (i = 0; i < _dt_nerr; i++) { 131 if (_dt_errlist[i].err == error) 132 return (_dt_errlist[i].msg); 133 } 134 str = NULL; 135 } else 136 str = strerror(error); 137 138 return (str ? str : "Unknown error"); 139 } 140 141 int 142 dtrace_errno(dtrace_hdl_t *dtp) 143 { 144 return (dtp->dt_errno); 145 } 146 147 int 148 dt_set_errno(dtrace_hdl_t *dtp, int err) 149 { 150 dtp->dt_errno = err; 151 return (-1); 152 } 153 154 void 155 dt_set_errmsg(dtrace_hdl_t *dtp, const char *errtag, const char *region, 156 const char *filename, int lineno, const char *format, va_list ap) 157 { 158 size_t len, n; 159 char *p, *s; 160 161 s = dtp->dt_errmsg; 162 n = sizeof (dtp->dt_errmsg); 163 164 if (errtag != NULL && (yypcb->pcb_cflags & DTRACE_C_ETAGS)) 165 (void) snprintf(s, n, "[%s] ", errtag); 166 else 167 s[0] = '\0'; 168 169 len = strlen(dtp->dt_errmsg); 170 s = dtp->dt_errmsg + len; 171 n = sizeof (dtp->dt_errmsg) - len; 172 173 if (filename == NULL) 174 filename = dtp->dt_filetag; 175 176 if (filename != NULL) 177 (void) snprintf(s, n, "\"%s\", line %d: ", filename, lineno); 178 else if (lineno != 0) 179 (void) snprintf(s, n, "line %d: ", lineno); 180 else if (region != NULL) 181 (void) snprintf(s, n, "in %s: ", region); 182 183 len = strlen(dtp->dt_errmsg); 184 s = dtp->dt_errmsg + len; 185 n = sizeof (dtp->dt_errmsg) - len; 186 (void) vsnprintf(s, n, format, ap); 187 188 if ((p = strrchr(dtp->dt_errmsg, '\n')) != NULL) 189 *p = '\0'; /* remove trailing \n from message buffer */ 190 191 dtp->dt_errtag = errtag; 192 } 193 194 /*ARGSUSED*/ 195 const char * 196 dtrace_faultstr(dtrace_hdl_t *dtp, int fault) 197 { 198 int i; 199 200 static const struct { 201 int code; 202 const char *str; 203 } faults[] = { 204 { DTRACEFLT_BADADDR, "invalid address" }, 205 { DTRACEFLT_BADALIGN, "invalid alignment" }, 206 { DTRACEFLT_ILLOP, "illegal operation" }, 207 { DTRACEFLT_DIVZERO, "divide-by-zero" }, 208 { DTRACEFLT_NOSCRATCH, "out of scratch space" }, 209 { DTRACEFLT_KPRIV, "invalid kernel access" }, 210 { DTRACEFLT_UPRIV, "invalid user access" }, 211 { DTRACEFLT_TUPOFLOW, "tuple stack overflow" }, 212 { DTRACEFLT_BADSTACK, "bad stack" }, 213 { DTRACEFLT_LIBRARY, "library-level fault" }, 214 { 0, NULL } 215 }; 216 217 for (i = 0; faults[i].str != NULL; i++) { 218 if (faults[i].code == fault) 219 return (faults[i].str); 220 } 221 222 return ("unknown fault"); 223 } 224