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 <string.h>
33 #include <strings.h>
34 #include <dt_impl.h>
35
36 static const struct {
37 int err;
38 const char *msg;
39 } _dt_errlist[] = {
40 { EDT_VERSION, "Client requested version newer than library" },
41 { EDT_VERSINVAL, "Version is not properly formatted or is too large" },
42 { EDT_VERSUNDEF, "Requested version is not supported by compiler" },
43 { EDT_VERSREDUCED, "Requested version conflicts with earlier setting" },
44 { EDT_CTF, "Unexpected libctf error" },
45 { EDT_COMPILER, "Error in D program compilation" },
46 { EDT_NOTUPREG, "Insufficient tuple registers to generate code" },
47 { EDT_NOMEM, "Memory allocation failure" },
48 { EDT_INT2BIG, "Integer constant table limit exceeded" },
49 { EDT_STR2BIG, "String constant table limit exceeded" },
50 { EDT_NOMOD, "Unknown module name" },
51 { EDT_NOPROV, "Unknown provider name" },
52 { EDT_NOPROBE, "No probe matches description" },
53 { EDT_NOSYM, "Unknown symbol name" },
54 { EDT_NOSYMADDR, "No symbol corresponds to address" },
55 { EDT_NOTYPE, "Unknown type name" },
56 { EDT_NOVAR, "Unknown variable name" },
57 { EDT_NOAGG, "Unknown aggregation name" },
58 { EDT_BADSCOPE, "Improper use of scoping operator in type name" },
59 { EDT_BADSPEC, "Overspecified probe description" },
60 { EDT_BADSPCV, "Undefined macro variable in probe description" },
61 { EDT_BADID, "Unknown probe identifier" },
62 { EDT_NOTLOADED, "Module is no longer loaded" },
63 { EDT_NOCTF, "Module does not contain any CTF data" },
64 { EDT_DATAMODEL, "Module and program data models do not match" },
65 { EDT_DIFVERS, "Library uses newer DIF version than kernel" },
66 { EDT_BADAGG, "Unknown aggregating action" },
67 { EDT_FIO, "Error occurred while reading from input stream" },
68 { EDT_DIFINVAL, "DIF program content is invalid" },
69 { EDT_DIFSIZE, "DIF program exceeds maximum program size" },
70 { EDT_DIFFAULT, "DIF program contains invalid pointer" },
71 { EDT_BADPROBE, "Invalid probe specification" },
72 { EDT_BADPGLOB, "Probe description has too many globbing characters" },
73 { EDT_NOSCOPE, "Declaration scope stack underflow" },
74 { EDT_NODECL, "Declaration stack underflow" },
75 { EDT_DMISMATCH, "Data record list does not match statement" },
76 { EDT_DOFFSET, "Data record offset exceeds buffer boundary" },
77 { EDT_DALIGN, "Data record has inappropriate alignment" },
78 { EDT_BADOPTNAME, "Invalid option name" },
79 { EDT_BADOPTVAL, "Invalid value for specified option" },
80 { EDT_BADOPTCTX, "Option cannot be used from within a D program" },
81 { EDT_CPPFORK, "Failed to fork preprocessor" },
82 { EDT_CPPEXEC, "Failed to exec preprocessor" },
83 { EDT_CPPENT, "Preprocessor not found" },
84 { EDT_CPPERR, "Preprocessor failed to process input program" },
85 { EDT_SYMOFLOW, "Symbol table identifier space exhausted" },
86 { EDT_ACTIVE, "Operation illegal when tracing is active" },
87 { EDT_DESTRUCTIVE, "Destructive actions not allowed" },
88 { EDT_NOANON, "No anonymous tracing state" },
89 { EDT_ISANON, "Can't claim anonymous state and enable probes" },
90 { EDT_ENDTOOBIG, "END enablings exceed size of principal buffer" },
91 { EDT_NOCONV, "Failed to load type for printf conversion" },
92 { EDT_BADCONV, "Incomplete printf conversion" },
93 { EDT_BADERROR, "Invalid library ERROR action" },
94 { EDT_ERRABORT, "Abort due to error" },
95 { EDT_DROPABORT, "Abort due to drop" },
96 { EDT_DIRABORT, "Abort explicitly directed" },
97 { EDT_BADRVAL, "Invalid return value from callback" },
98 { EDT_BADNORMAL, "Invalid normalization" },
99 { EDT_BUFTOOSMALL, "Enabling exceeds size of buffer" },
100 { EDT_BADTRUNC, "Invalid truncation" },
101 { EDT_BUSY, "DTrace cannot be used when kernel debugger is active" },
102 { EDT_ACCESS, "DTrace requires additional privileges" },
103 { EDT_NOENT, "DTrace device not available on system" },
104 { EDT_BRICKED, "Abort due to systemic unresponsiveness" },
105 { EDT_HARDWIRE, "Failed to load language definitions" },
106 { EDT_ELFVERSION, "libelf is out-of-date with respect to libdtrace" },
107 { EDT_NOBUFFERED, "Attempt to buffer output without handler" },
108 { EDT_UNSTABLE, "Description matched an unstable set of probes" },
109 { EDT_BADSETOPT, "Invalid setopt() library action" },
110 { EDT_BADSTACKPC, "Invalid stack program counter size" },
111 { EDT_BADAGGVAR, "Invalid aggregation variable identifier" },
112 { EDT_OVERSION, "Client requested deprecated version of library" },
113 { EDT_ENABLING_ERR, "Failed to enable probe" },
114 { EDT_NOPROBES, "No probe sites found for declared provider" },
115 { EDT_CANTLOAD, "Failed to load module" },
116 };
117
118 static const int _dt_nerr = sizeof (_dt_errlist) / sizeof (_dt_errlist[0]);
119
120 const char *
dtrace_errmsg(dtrace_hdl_t * dtp,int error)121 dtrace_errmsg(dtrace_hdl_t *dtp, int error)
122 {
123 const char *str;
124 int i;
125
126 if (error == EDT_COMPILER && dtp != NULL && dtp->dt_errmsg[0] != '\0')
127 str = dtp->dt_errmsg;
128 else if (error == EDT_CTF && dtp != NULL && dtp->dt_ctferr != 0)
129 str = ctf_errmsg(dtp->dt_ctferr);
130 else if (error >= EDT_BASE && (error - EDT_BASE) < _dt_nerr) {
131 for (i = 0; i < _dt_nerr; i++) {
132 if (_dt_errlist[i].err == error)
133 return (_dt_errlist[i].msg);
134 }
135 str = NULL;
136 } else
137 str = strerror(error);
138
139 return (str ? str : "Unknown error");
140 }
141
142 int
dtrace_errno(dtrace_hdl_t * dtp)143 dtrace_errno(dtrace_hdl_t *dtp)
144 {
145 return (dtp->dt_errno);
146 }
147
148 #ifdef illumos
149 int
dt_set_errno(dtrace_hdl_t * dtp,int err)150 dt_set_errno(dtrace_hdl_t *dtp, int err)
151 {
152 dtp->dt_errno = err;
153 return (-1);
154 }
155 #else
156 int
_dt_set_errno(dtrace_hdl_t * dtp,int err,const char * errfile,int errline)157 _dt_set_errno(dtrace_hdl_t *dtp, int err, const char *errfile, int errline)
158 {
159 dtp->dt_errno = err;
160 dtp->dt_errfile = errfile;
161 dtp->dt_errline = errline;
162 return (-1);
163 }
164
dt_get_errloc(dtrace_hdl_t * dtp,const char ** p_errfile,int * p_errline)165 void dt_get_errloc(dtrace_hdl_t *dtp, const char **p_errfile, int *p_errline)
166 {
167 *p_errfile = dtp->dt_errfile;
168 *p_errline = dtp->dt_errline;
169 }
170 #endif
171
172 void
dt_set_errmsg(dtrace_hdl_t * dtp,const char * errtag,const char * region,const char * filename,int lineno,const char * format,va_list ap)173 dt_set_errmsg(dtrace_hdl_t *dtp, const char *errtag, const char *region,
174 const char *filename, int lineno, const char *format, va_list ap)
175 {
176 size_t len, n;
177 char *p, *s;
178
179 s = dtp->dt_errmsg;
180 n = sizeof (dtp->dt_errmsg);
181
182 if (errtag != NULL && (yypcb->pcb_cflags & DTRACE_C_ETAGS))
183 (void) snprintf(s, n, "[%s] ", errtag);
184 else
185 s[0] = '\0';
186
187 len = strlen(dtp->dt_errmsg);
188 s = dtp->dt_errmsg + len;
189 n = sizeof (dtp->dt_errmsg) - len;
190
191 if (filename == NULL)
192 filename = dtp->dt_filetag;
193
194 if (filename != NULL)
195 (void) snprintf(s, n, "\"%s\", line %d: ", filename, lineno);
196 else if (lineno != 0)
197 (void) snprintf(s, n, "line %d: ", lineno);
198 else if (region != NULL)
199 (void) snprintf(s, n, "in %s: ", region);
200
201 len = strlen(dtp->dt_errmsg);
202 s = dtp->dt_errmsg + len;
203 n = sizeof (dtp->dt_errmsg) - len;
204 (void) vsnprintf(s, n, format, ap);
205
206 if ((p = strrchr(dtp->dt_errmsg, '\n')) != NULL)
207 *p = '\0'; /* remove trailing \n from message buffer */
208
209 dtp->dt_errtag = errtag;
210 }
211
212 /*ARGSUSED*/
213 const char *
dtrace_faultstr(dtrace_hdl_t * dtp,int fault)214 dtrace_faultstr(dtrace_hdl_t *dtp, int fault)
215 {
216 int i;
217
218 static const struct {
219 int code;
220 const char *str;
221 } faults[] = {
222 { DTRACEFLT_BADADDR, "invalid address" },
223 { DTRACEFLT_BADALIGN, "invalid alignment" },
224 { DTRACEFLT_ILLOP, "illegal operation" },
225 { DTRACEFLT_DIVZERO, "divide-by-zero" },
226 { DTRACEFLT_NOSCRATCH, "out of scratch space" },
227 { DTRACEFLT_KPRIV, "invalid kernel access" },
228 { DTRACEFLT_UPRIV, "invalid user access" },
229 { DTRACEFLT_TUPOFLOW, "tuple stack overflow" },
230 { DTRACEFLT_BADSTACK, "bad stack" },
231 { DTRACEFLT_LIBRARY, "library-level fault" },
232 { 0, NULL }
233 };
234
235 for (i = 0; faults[i].str != NULL; i++) {
236 if (faults[i].code == fault)
237 return (faults[i].str);
238 }
239
240 return ("unknown fault");
241 }
242