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