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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <strings.h> 30 #include <dt_impl.h> 31 32 static const struct { 33 int err; 34 const char *msg; 35 } _dt_errlist[] = { 36 { EDT_VERSION, "Client requested version newer than library" }, 37 { EDT_VERSINVAL, "Version is not properly formatted or is too large" }, 38 { EDT_VERSUNDEF, "Requested version is not supported by compiler" }, 39 { EDT_VERSREDUCED, "Requested version conflicts with earlier setting" }, 40 { EDT_CTF, "Unexpected libctf error" }, 41 { EDT_COMPILER, "Error in D program compilation" }, 42 { EDT_NOREG, "Insufficient registers to generate code" }, 43 { EDT_NOTUPREG, "Insufficient tuple registers to generate code" }, 44 { EDT_NOMEM, "Memory allocation failure" }, 45 { EDT_INT2BIG, "Integer constant table limit exceeded" }, 46 { EDT_STR2BIG, "String constant table limit exceeded" }, 47 { EDT_NOMOD, "Unknown module name" }, 48 { EDT_NOPROV, "Unknown provider name" }, 49 { EDT_NOPROBE, "No probe matches description" }, 50 { EDT_NOSYM, "Unknown symbol name" }, 51 { EDT_NOSYMADDR, "No symbol corresponds to address" }, 52 { EDT_NOTYPE, "Unknown type name" }, 53 { EDT_NOVAR, "Unknown variable name" }, 54 { EDT_NOAGG, "Unknown aggregation name" }, 55 { EDT_BADSCOPE, "Improper use of scoping operator in type name" }, 56 { EDT_BADSPEC, "Overspecified probe description" }, 57 { EDT_BADSPCV, "Undefined macro variable in probe description" }, 58 { EDT_BADID, "Unknown probe identifier" }, 59 { EDT_NOTLOADED, "Module is no longer loaded" }, 60 { EDT_NOCTF, "Module does not contain any CTF data" }, 61 { EDT_DATAMODEL, "Module and program data models do not match" }, 62 { EDT_DIFVERS, "Library uses newer DIF version than kernel" }, 63 { EDT_BADAGG, "Unknown aggregating action" }, 64 { EDT_FIO, "Error occurred while reading from input stream" }, 65 { EDT_DIFINVAL, "DIF program content is invalid" }, 66 { EDT_DIFSIZE, "DIF program exceeds maximum program size" }, 67 { EDT_DIFFAULT, "DIF program contains invalid pointer" }, 68 { EDT_BADPROBE, "Invalid probe specification" }, 69 { EDT_BADPGLOB, "Probe description has too many globbing characters" }, 70 { EDT_NOSCOPE, "Declaration scope stack underflow" }, 71 { EDT_NODECL, "Declaration stack underflow" }, 72 { EDT_DMISMATCH, "Data record list does not match statement" }, 73 { EDT_DOFFSET, "Data record offset exceeds buffer boundary" }, 74 { EDT_DALIGN, "Data record has inappropriate alignment" }, 75 { EDT_BADOPTNAME, "Invalid option name" }, 76 { EDT_BADOPTVAL, "Invalid value for specified option" }, 77 { EDT_BADOPTCTX, "Option cannot be used from within a D program" }, 78 { EDT_CPPFORK, "Failed to fork preprocessor" }, 79 { EDT_CPPEXEC, "Failed to exec preprocessor" }, 80 { EDT_CPPENT, "Preprocessor not found" }, 81 { EDT_CPPERR, "Preprocessor failed to process input program" }, 82 { EDT_SYMOFLOW, "Symbol table identifier space exhausted" }, 83 { EDT_ACTIVE, "Operation illegal when tracing is active" }, 84 { EDT_DESTRUCTIVE, "Destructive actions not allowed" }, 85 { EDT_NOANON, "No anonymous tracing state" }, 86 { EDT_ISANON, "Can't claim anonymous state and enable probes" }, 87 { EDT_ENDTOOBIG, "END enablings exceed size of principal buffer" }, 88 { EDT_NOCONV, "Failed to load type for printf conversion" }, 89 { EDT_BADCONV, "Incomplete printf conversion" }, 90 { EDT_BADERROR, "Invalid library ERROR action" }, 91 { EDT_ERRABORT, "Abort due to error" }, 92 { EDT_DROPABORT, "Abort due to drop" }, 93 { EDT_DIRABORT, "Abort explicitly directed" }, 94 { EDT_BADRVAL, "Invalid return value from callback" }, 95 { EDT_BADNORMAL, "Invalid normalization" }, 96 { EDT_BUFTOOSMALL, "Enabling exceeds size of buffer" }, 97 { EDT_BADTRUNC, "Invalid truncation" }, 98 { EDT_BUSY, "DTrace cannot be used when kernel debugger is active" }, 99 { EDT_ACCESS, "DTrace requires additional privileges" }, 100 { EDT_GNOENT, "DTrace device not available on system" }, 101 { EDT_ZNOENT, "DTrace device not available in local zone" }, 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 }; 108 109 static const int _dt_nerr = sizeof (_dt_errlist) / sizeof (_dt_errlist[0]); 110 111 const char * 112 dtrace_errmsg(dtrace_hdl_t *dtp, int error) 113 { 114 const char *str; 115 int i; 116 117 if (error == EDT_COMPILER && dtp != NULL && dtp->dt_errmsg[0] != '\0') 118 str = dtp->dt_errmsg; 119 else if (error == EDT_CTF && dtp != NULL && dtp->dt_ctferr != 0) 120 str = ctf_errmsg(dtp->dt_ctferr); 121 else if (error >= EDT_BASE && (error - EDT_BASE) < _dt_nerr) { 122 for (i = 0; i < _dt_nerr; i++) { 123 if (_dt_errlist[i].err == error) 124 return (_dt_errlist[i].msg); 125 } 126 str = NULL; 127 } else 128 str = strerror(error); 129 130 return (str ? str : "Unknown error"); 131 } 132 133 int 134 dtrace_errno(dtrace_hdl_t *dtp) 135 { 136 return (dtp->dt_errno); 137 } 138 139 int 140 dt_set_errno(dtrace_hdl_t *dtp, int err) 141 { 142 dtp->dt_errno = err; 143 return (-1); 144 } 145 146 void 147 dt_set_errmsg(dtrace_hdl_t *dtp, const char *errtag, const char *region, 148 const char *filename, int lineno, const char *format, va_list ap) 149 { 150 size_t len, n; 151 char *p, *s; 152 153 s = dtp->dt_errmsg; 154 n = sizeof (dtp->dt_errmsg); 155 156 if (errtag != NULL && (yypcb->pcb_cflags & DTRACE_C_ETAGS)) 157 (void) snprintf(s, n, "[%s] ", errtag); 158 else 159 s[0] = '\0'; 160 161 len = strlen(dtp->dt_errmsg); 162 s = dtp->dt_errmsg + len; 163 n = sizeof (dtp->dt_errmsg) - len; 164 165 if (filename == NULL) 166 filename = dtp->dt_filetag; 167 168 if (filename != NULL) 169 (void) snprintf(s, n, "\"%s\", line %d: ", filename, lineno); 170 else if (lineno != 0) 171 (void) snprintf(s, n, "line %d: ", lineno); 172 else if (region != NULL) 173 (void) snprintf(s, n, "in %s: ", region); 174 175 len = strlen(dtp->dt_errmsg); 176 s = dtp->dt_errmsg + len; 177 n = sizeof (dtp->dt_errmsg) - len; 178 (void) vsnprintf(s, n, format, ap); 179 180 if ((p = strrchr(dtp->dt_errmsg, '\n')) != NULL) 181 *p = '\0'; /* remove trailing \n from message buffer */ 182 183 dtp->dt_errtag = errtag; 184 } 185 186 /*ARGSUSED*/ 187 const char * 188 dtrace_faultstr(dtrace_hdl_t *dtp, int fault) 189 { 190 int i; 191 192 static const struct { 193 int code; 194 const char *str; 195 } faults[] = { 196 { DTRACEFLT_BADADDR, "invalid address" }, 197 { DTRACEFLT_BADALIGN, "invalid alignment" }, 198 { DTRACEFLT_ILLOP, "illegal operation" }, 199 { DTRACEFLT_DIVZERO, "divide-by-zero" }, 200 { DTRACEFLT_NOSCRATCH, "out of scratch space" }, 201 { DTRACEFLT_KPRIV, "invalid kernel access" }, 202 { DTRACEFLT_UPRIV, "invalid user access" }, 203 { DTRACEFLT_TUPOFLOW, "tuple stack overflow" }, 204 { DTRACEFLT_LIBRARY, "library-level fault" }, 205 { 0, NULL } 206 }; 207 208 for (i = 0; faults[i].str != NULL; i++) { 209 if (faults[i].code == fault) 210 return (faults[i].str); 211 } 212 213 return ("unknown fault"); 214 } 215