logging: print human-readable thread names when logging
[lttng-tools.git] / src / common / error.c
1 /*
2 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0-only
5 *
6 */
7
8 #define _LGPL_SOURCE
9 #include <assert.h>
10 #include <errno.h>
11 #include <inttypes.h>
12 #include <pthread.h>
13 #include <stdlib.h>
14 #include <string.h>
15
16 #include <common/common.h>
17 #include <common/compat/getenv.h>
18 #include <lttng/lttng-error.h>
19
20 #include "error.h"
21
22 #define ERROR_INDEX(code) (code - LTTNG_OK)
23
24 /*
25 * lttng_opt_abort_on_error: unset: -1, disabled: 0, enabled: 1.
26 * Controlled by the LTTNG_ABORT_ON_ERROR environment variable.
27 */
28 static int lttng_opt_abort_on_error = -1;
29
30 /* TLS variable that contains the time of one single log entry. */
31 DEFINE_URCU_TLS(struct log_time, error_log_time);
32 DEFINE_URCU_TLS(const char *, logger_thread_name);
33
34 LTTNG_HIDDEN
35 const char *log_add_time(void)
36 {
37 int ret;
38 struct tm tm, *res;
39 struct timespec tp;
40 time_t now;
41 const int errsv = errno;
42
43 ret = lttng_clock_gettime(CLOCK_REALTIME, &tp);
44 if (ret < 0) {
45 goto error;
46 }
47 now = (time_t) tp.tv_sec;
48
49 res = localtime_r(&now, &tm);
50 if (!res) {
51 goto error;
52 }
53
54 /* Format time in the TLS variable. */
55 ret = snprintf(URCU_TLS(error_log_time).str, sizeof(URCU_TLS(error_log_time).str),
56 "%02d:%02d:%02d.%09ld",
57 tm.tm_hour, tm.tm_min, tm.tm_sec, tp.tv_nsec);
58 if (ret < 0) {
59 goto error;
60 }
61
62 errno = errsv;
63 return URCU_TLS(error_log_time).str;
64
65 error:
66 /* Return an empty string on error so logging is not affected. */
67 errno = errsv;
68 return "";
69 }
70
71 LTTNG_HIDDEN
72 void logger_set_thread_name(const char *name, bool set_pthread_name)
73 {
74 int ret;
75
76 assert(name);
77 URCU_TLS(logger_thread_name) = name;
78
79 if (set_pthread_name) {
80 char pthread_name[16];
81
82 /*
83 * Truncations are expected since pthread limits thread names to
84 * a generous 16 characters.
85 */
86 strncpy(pthread_name, name, sizeof(pthread_name));
87 pthread_name[sizeof(pthread_name) - 1] = '\0';
88 ret = pthread_setname_np(pthread_self(), pthread_name);
89 if (ret) {
90 DBG("Failed to set pthread name attribute");
91 }
92 }
93 }
94
95 /*
96 * Human readable error message.
97 */
98 static const char *error_string_array[] = {
99 /* LTTNG_OK code MUST be at the top for the ERROR_INDEX macro to work */
100 [ ERROR_INDEX(LTTNG_OK) ] = "Success",
101 [ ERROR_INDEX(LTTNG_ERR_UNK) ] = "Unknown error",
102 [ ERROR_INDEX(LTTNG_ERR_UND) ] = "Undefined command",
103 [ ERROR_INDEX(LTTNG_ERR_UNKNOWN_DOMAIN) ] = "Unknown tracing domain",
104 [ ERROR_INDEX(LTTNG_ERR_NO_SESSION) ] = "No session found",
105 [ ERROR_INDEX(LTTNG_ERR_CREATE_DIR_FAIL) ] = "Create directory failed",
106 [ ERROR_INDEX(LTTNG_ERR_SESSION_FAIL) ] = "Create session failed",
107 [ ERROR_INDEX(LTTNG_ERR_SESS_NOT_FOUND) ] = "Session name not found",
108 [ ERROR_INDEX(LTTNG_ERR_FATAL) ] = "Fatal error of the session daemon",
109 [ ERROR_INDEX(LTTNG_ERR_SELECT_SESS) ] = "A session MUST be selected",
110 [ ERROR_INDEX(LTTNG_ERR_EXIST_SESS) ] = "Session name already exists",
111 [ ERROR_INDEX(LTTNG_ERR_NO_EVENT) ] = "Event not found",
112 [ ERROR_INDEX(LTTNG_ERR_CONNECT_FAIL) ] = "Unable to connect to Unix socket",
113 [ ERROR_INDEX(LTTNG_ERR_EPERM) ] = "Permission denied",
114 [ ERROR_INDEX(LTTNG_ERR_KERN_NA) ] = "Kernel tracer not available",
115 [ ERROR_INDEX(LTTNG_ERR_KERN_VERSION) ] = "Kernel tracer version is not compatible",
116 [ ERROR_INDEX(LTTNG_ERR_KERN_EVENT_EXIST) ] = "Kernel event already exists",
117 [ ERROR_INDEX(LTTNG_ERR_KERN_SESS_FAIL) ] = "Kernel create session failed",
118 [ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_EXIST) ] = "Kernel channel already exists",
119 [ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_FAIL) ] = "Kernel create channel failed",
120 [ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found",
121 [ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed",
122 [ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed",
123 [ ERROR_INDEX(LTTNG_ERR_KERN_CONTEXT_FAIL) ] = "Add kernel context failed",
124 [ ERROR_INDEX(LTTNG_ERR_KERN_ENABLE_FAIL) ] = "Enable kernel event failed",
125 [ ERROR_INDEX(LTTNG_ERR_KERN_DISABLE_FAIL) ] = "Disable kernel event failed",
126 [ ERROR_INDEX(LTTNG_ERR_KERN_META_FAIL) ] = "Opening metadata failed",
127 [ ERROR_INDEX(LTTNG_ERR_KERN_START_FAIL) ] = "Starting kernel trace failed",
128 [ ERROR_INDEX(LTTNG_ERR_KERN_STOP_FAIL) ] = "Stopping kernel trace failed",
129 [ ERROR_INDEX(LTTNG_ERR_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed",
130 [ ERROR_INDEX(LTTNG_ERR_KERN_STREAM_FAIL) ] = "Kernel create stream failed",
131 [ ERROR_INDEX(LTTNG_ERR_KERN_LIST_FAIL) ] = "Listing kernel events failed",
132 [ ERROR_INDEX(LTTNG_ERR_UST_CALIBRATE_FAIL) ] = "UST calibration failed",
133 [ ERROR_INDEX(LTTNG_ERR_UST_SESS_FAIL) ] = "UST create session failed",
134 [ ERROR_INDEX(LTTNG_ERR_UST_CHAN_FAIL) ] = "UST create channel failed",
135 [ ERROR_INDEX(LTTNG_ERR_UST_CHAN_EXIST) ] = "UST channel already exist",
136 [ ERROR_INDEX(LTTNG_ERR_UST_CHAN_NOT_FOUND) ] = "UST channel not found",
137 [ ERROR_INDEX(LTTNG_ERR_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed",
138 [ ERROR_INDEX(LTTNG_ERR_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed",
139 [ ERROR_INDEX(LTTNG_ERR_UST_ENABLE_FAIL) ] = "Enable UST event failed",
140 [ ERROR_INDEX(LTTNG_ERR_UST_DISABLE_FAIL) ] = "Disable UST event failed",
141 [ ERROR_INDEX(LTTNG_ERR_UST_META_FAIL) ] = "Opening metadata failed",
142 [ ERROR_INDEX(LTTNG_ERR_UST_START_FAIL) ] = "Starting UST trace failed",
143 [ ERROR_INDEX(LTTNG_ERR_UST_STOP_FAIL) ] = "Stopping UST trace failed",
144 [ ERROR_INDEX(LTTNG_ERR_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed",
145 [ ERROR_INDEX(LTTNG_ERR_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed",
146 [ ERROR_INDEX(LTTNG_ERR_UST_STREAM_FAIL) ] = "UST create stream failed",
147 [ ERROR_INDEX(LTTNG_ERR_UST_LIST_FAIL) ] = "Listing UST events failed",
148 [ ERROR_INDEX(LTTNG_ERR_UST_EVENT_EXIST) ] = "UST event already exist",
149 [ ERROR_INDEX(LTTNG_ERR_UST_EVENT_NOT_FOUND)] = "UST event not found",
150 [ ERROR_INDEX(LTTNG_ERR_UST_CONTEXT_EXIST)] = "UST context already exist",
151 [ ERROR_INDEX(LTTNG_ERR_UST_CONTEXT_INVAL)] = "UST invalid context",
152 [ ERROR_INDEX(LTTNG_ERR_NEED_ROOT_SESSIOND) ] = "Tracing the kernel requires a root lttng-sessiond daemon, as well as \"tracing\" group membership or root user ID for the lttng client.",
153 [ ERROR_INDEX(LTTNG_ERR_NO_UST) ] = "LTTng-UST tracer is not supported. Please rebuild lttng-tools with lttng-ust support enabled.",
154 [ ERROR_INDEX(LTTNG_ERR_TRACE_ALREADY_STARTED) ] = "Tracing has already been started once",
155 [ ERROR_INDEX(LTTNG_ERR_TRACE_ALREADY_STOPPED) ] = "Tracing has already been stopped",
156 [ ERROR_INDEX(LTTNG_ERR_KERN_EVENT_ENOSYS) ] = "Kernel event type not supported",
157 [ ERROR_INDEX(LTTNG_ERR_NEED_CHANNEL_NAME) ] = "Non-default channel exists within session: channel name needs to be specified with '-c name'",
158 [ ERROR_INDEX(LTTNG_ERR_INVALID) ] = "Invalid parameter",
159 [ ERROR_INDEX(LTTNG_ERR_NO_USTCONSUMERD) ] = "No UST consumer detected",
160 [ ERROR_INDEX(LTTNG_ERR_NO_KERNCONSUMERD) ] = "No kernel consumer detected",
161 [ ERROR_INDEX(LTTNG_ERR_EVENT_EXIST_LOGLEVEL) ] = "Event already enabled with different loglevel",
162 [ ERROR_INDEX(LTTNG_ERR_URL_DATA_MISS) ] = "Missing data path URL",
163 [ ERROR_INDEX(LTTNG_ERR_URL_CTRL_MISS) ] = "Missing control path URL",
164 [ ERROR_INDEX(LTTNG_ERR_ENABLE_CONSUMER_FAIL) ] = "Enabling consumer failed",
165 [ ERROR_INDEX(LTTNG_ERR_RELAYD_CONNECT_FAIL) ] = "Unable to connect to lttng-relayd",
166 [ ERROR_INDEX(LTTNG_ERR_RELAYD_VERSION_FAIL) ] = "Relay daemon not compatible",
167 [ ERROR_INDEX(LTTNG_ERR_FILTER_INVAL) ] = "Invalid filter bytecode",
168 [ ERROR_INDEX(LTTNG_ERR_FILTER_NOMEM) ] = "Not enough memory for filter bytecode",
169 [ ERROR_INDEX(LTTNG_ERR_FILTER_EXIST) ] = "Filter already exist",
170 [ ERROR_INDEX(LTTNG_ERR_NO_CONSUMER) ] = "Consumer not found for tracing session",
171 [ ERROR_INDEX(LTTNG_ERR_NO_SESSIOND) ] = "No session daemon is available",
172 [ ERROR_INDEX(LTTNG_ERR_SESSION_STARTED) ] = "Session is running",
173 [ ERROR_INDEX(LTTNG_ERR_NOT_SUPPORTED) ] = "Operation not supported",
174 [ ERROR_INDEX(LTTNG_ERR_UST_EVENT_ENABLED) ] = "UST event already enabled",
175 [ ERROR_INDEX(LTTNG_ERR_SET_URL) ] = "Error setting URL",
176 [ ERROR_INDEX(LTTNG_ERR_URL_EXIST) ] = "URL already exists",
177 [ ERROR_INDEX(LTTNG_ERR_BUFFER_NOT_SUPPORTED)] = "Buffer type not supported",
178 [ ERROR_INDEX(LTTNG_ERR_BUFFER_TYPE_MISMATCH)] = "Buffer type mismatch for session",
179 [ ERROR_INDEX(LTTNG_ERR_NOMEM)] = "Not enough memory",
180 [ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST) ] = "Snapshot output already exists",
181 [ ERROR_INDEX(LTTNG_ERR_START_SESSION_ONCE) ] = "Session needs to be started once",
182 [ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_FAIL) ] = "Snapshot record failed",
183 [ ERROR_INDEX(LTTNG_ERR_CHAN_EXIST) ] = "Channel already exists",
184 [ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_NODATA) ] = "No data available in snapshot",
185 [ ERROR_INDEX(LTTNG_ERR_NO_CHANNEL) ] = "No channel found in the session",
186 [ ERROR_INDEX(LTTNG_ERR_SESSION_INVALID_CHAR) ] = "Invalid character found in session name",
187 [ ERROR_INDEX(LTTNG_ERR_SAVE_FILE_EXIST) ] = "Session file already exists",
188 [ ERROR_INDEX(LTTNG_ERR_SAVE_IO_FAIL) ] = "IO error while writing session configuration",
189 [ ERROR_INDEX(LTTNG_ERR_LOAD_INVALID_CONFIG) ] = "Invalid session configuration",
190 [ ERROR_INDEX(LTTNG_ERR_LOAD_IO_FAIL) ] = "IO error while reading a session configuration",
191 [ ERROR_INDEX(LTTNG_ERR_LOAD_SESSION_NOENT) ] = "Session file not found",
192 [ ERROR_INDEX(LTTNG_ERR_MAX_SIZE_INVALID) ] = "Snapshot max size is invalid",
193 [ ERROR_INDEX(LTTNG_ERR_MI_OUTPUT_TYPE) ] = "Invalid MI output format",
194 [ ERROR_INDEX(LTTNG_ERR_MI_IO_FAIL) ] = "IO error while writing MI output",
195 [ ERROR_INDEX(LTTNG_ERR_MI_NOT_IMPLEMENTED) ] = "Mi feature not implemented",
196 [ ERROR_INDEX(LTTNG_ERR_INVALID_EVENT_NAME) ] = "Invalid event name",
197 [ ERROR_INDEX(LTTNG_ERR_INVALID_CHANNEL_NAME) ] = "Invalid channel name",
198 [ ERROR_INDEX(LTTNG_ERR_PROCESS_ATTR_EXISTS) ] = "Process attribute is already tracked",
199 [ ERROR_INDEX(LTTNG_ERR_PROCESS_ATTR_MISSING) ] = "Process attribute was not tracked",
200 [ ERROR_INDEX(LTTNG_ERR_INVALID_CHANNEL_DOMAIN) ] = "Invalid channel domain",
201 [ ERROR_INDEX(LTTNG_ERR_OVERFLOW) ] = "Overflow occurred",
202 [ ERROR_INDEX(LTTNG_ERR_SESSION_NOT_STARTED) ] = "Session not started",
203 [ ERROR_INDEX(LTTNG_ERR_LIVE_SESSION) ] = "Live sessions are not supported",
204 [ ERROR_INDEX(LTTNG_ERR_PER_PID_SESSION) ] = "Per-PID tracing sessions are not supported",
205 [ ERROR_INDEX(LTTNG_ERR_KERN_CONTEXT_UNAVAILABLE) ] = "Context unavailable on this kernel",
206 [ ERROR_INDEX(LTTNG_ERR_REGEN_STATEDUMP_FAIL) ] = "Failed to regenerate the state dump",
207 [ ERROR_INDEX(LTTNG_ERR_REGEN_STATEDUMP_NOMEM) ] = "Failed to regenerate the state dump, not enough memory",
208 [ ERROR_INDEX(LTTNG_ERR_NOT_SNAPSHOT_SESSION) ] = "Snapshot command can't be applied to a non-snapshot session",
209 [ ERROR_INDEX(LTTNG_ERR_INVALID_TRIGGER) ] = "Invalid trigger",
210 [ ERROR_INDEX(LTTNG_ERR_TRIGGER_EXISTS) ] = "Trigger already registered",
211 [ ERROR_INDEX(LTTNG_ERR_TRIGGER_NOT_FOUND) ] = "Trigger not found",
212 [ ERROR_INDEX(LTTNG_ERR_COMMAND_CANCELLED) ] = "Command cancelled",
213 [ ERROR_INDEX(LTTNG_ERR_ROTATION_PENDING) ] = "Rotation already pending for this session",
214 [ ERROR_INDEX(LTTNG_ERR_ROTATION_NOT_AVAILABLE) ] = "Rotation feature not available for this session's creation mode",
215 [ ERROR_INDEX(LTTNG_ERR_ROTATION_SCHEDULE_SET) ] = "A session rotation schedule of this type is already set on the session",
216 [ ERROR_INDEX(LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET) ] = "No session rotation schedule of this type is set on the session",
217 [ ERROR_INDEX(LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP) ] = "Session was already rotated once since it became inactive",
218 [ ERROR_INDEX(LTTNG_ERR_ROTATION_WRONG_VERSION) ] = "Session rotation is not supported by this kernel tracer version",
219 [ ERROR_INDEX(LTTNG_ERR_NO_SESSION_OUTPUT) ] = "Session has no output",
220 [ ERROR_INDEX(LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY) ] = "Rotation feature not available on the relay",
221 [ ERROR_INDEX(LTTNG_ERR_AGENT_TRACING_DISABLED) ] = "Session daemon agent tracing is disabled",
222 [ ERROR_INDEX(LTTNG_ERR_PROBE_LOCATION_INVAL) ] = "Invalid userspace probe location",
223 [ ERROR_INDEX(LTTNG_ERR_ELF_PARSING) ] = "ELF parsing error",
224 [ ERROR_INDEX(LTTNG_ERR_SDT_PROBE_SEMAPHORE) ] = "SDT probe guarded by a semaphore",
225 [ ERROR_INDEX(LTTNG_ERR_ROTATION_FAIL_CONSUMER) ] = "Rotation failure on consumer",
226 [ ERROR_INDEX(LTTNG_ERR_ROTATE_RENAME_FAIL_CONSUMER) ] = "Rotation rename failure on consumer",
227 [ ERROR_INDEX(LTTNG_ERR_ROTATION_PENDING_LOCAL_FAIL_CONSUMER) ] = "Rotation pending check (local) failure on consumer",
228 [ ERROR_INDEX(LTTNG_ERR_ROTATION_PENDING_RELAY_FAIL_CONSUMER) ] = "Rotation pending check (relay) failure on consumer",
229 [ ERROR_INDEX(LTTNG_ERR_MKDIR_FAIL_CONSUMER) ] = "Directory creation failure on consumer",
230 [ ERROR_INDEX(LTTNG_ERR_CHAN_NOT_FOUND) ] = "Channel not found",
231 [ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_UNSUPPORTED) ] = "Session configuration does not allow the use of snapshots",
232 [ ERROR_INDEX(LTTNG_ERR_SESSION_NOT_EXIST) ] = "Tracing session does not exist",
233 [ ERROR_INDEX(LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER) ] = "Trace chunk creation failed on consumer",
234 [ ERROR_INDEX(LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER) ] = "Trace chunk close failed on consumer",
235 [ ERROR_INDEX(LTTNG_ERR_TRACE_CHUNK_EXISTS_FAIL_CONSUMER) ] = "Failed to query consumer for trace chunk existence",
236 [ ERROR_INDEX(LTTNG_ERR_INVALID_PROTOCOL) ] = "Protocol error occurred",
237 [ ERROR_INDEX(LTTNG_ERR_FILE_CREATION_ERROR) ] = "Failed to create file",
238 [ ERROR_INDEX(LTTNG_ERR_TIMER_STOP_ERROR) ] = "Failed to stop a timer",
239 [ ERROR_INDEX(LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) ] = "Rotation feature not supported by the kernel tracer.",
240 [ ERROR_INDEX(LTTNG_ERR_CLEAR_RELAY_DISALLOWED) ] = "Relayd daemon peer does not allow sessions to be cleared",
241 [ ERROR_INDEX(LTTNG_ERR_CLEAR_NOT_AVAILABLE_RELAY) ] = "Clearing a session is not supported by the relay daemon",
242 [ ERROR_INDEX(LTTNG_ERR_CLEAR_FAIL_CONSUMER) ] = "Consumer failed to clear the session",
243 [ ERROR_INDEX(LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR) ] = "Session was already cleared since it became inactive",
244 [ ERROR_INDEX(LTTNG_ERR_USER_NOT_FOUND) ] = "User not found",
245 [ ERROR_INDEX(LTTNG_ERR_GROUP_NOT_FOUND) ] = "Group not found",
246 [ ERROR_INDEX(LTTNG_ERR_UNSUPPORTED_DOMAIN) ] = "Unsupported domain used",
247 [ ERROR_INDEX(LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY) ] = "Operation does not apply to the process attribute tracker's tracking policy",
248
249 /* Last element */
250 [ ERROR_INDEX(LTTNG_ERR_NR) ] = "Unknown error code"
251 };
252
253 /*
254 * Return ptr to string representing a human readable error code from the
255 * lttng_error_code enum.
256 *
257 * These code MUST be negative in other to treat that as an error value.
258 */
259 LTTNG_HIDDEN
260 const char *error_get_str(int32_t code)
261 {
262 code = -code;
263
264 if (code < LTTNG_OK || code > LTTNG_ERR_NR) {
265 code = LTTNG_ERR_NR;
266 }
267
268 return error_string_array[ERROR_INDEX(code)];
269 }
270
271 LTTNG_HIDDEN
272 void lttng_abort_on_error(void)
273 {
274 if (lttng_opt_abort_on_error < 0) {
275 /* Use lttng_secure_getenv() to query its state. */
276 const char *value;
277
278 value = lttng_secure_getenv("LTTNG_ABORT_ON_ERROR");
279 if (value && !strcmp(value, "1")) {
280 lttng_opt_abort_on_error = 1;
281 } else {
282 lttng_opt_abort_on_error = 0;
283 }
284 }
285 if (lttng_opt_abort_on_error > 0) {
286 abort();
287 }
288 }
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