[lttng-tools.git] / src / common / error.c

/*
 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, version 2 only, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <assert.h>
#include <inttypes.h>

#include <lttng/lttng-error.h>
#include <common/common.h>

#include "error.h"

#define ERROR_INDEX(code) (code - LTTNG_OK)

/* TLS variable that contains the time of one single log entry. */
DEFINE_URCU_TLS(struct log_time, error_log_time);

LTTNG_HIDDEN
const char *log_add_time(void)
{
	int ret;
	struct tm tm, *res;
	struct timespec tp;
	time_t now;

	ret = clock_gettime(CLOCK_REALTIME, &tp);
	if (ret < 0) {
		goto error;
	}
	now = (time_t) tp.tv_sec;

	res = localtime_r(&now, &tm);
	if (!res) {
		goto error;
	}

	/* Format time in the TLS variable. */
	ret = snprintf(URCU_TLS(error_log_time).str, sizeof(URCU_TLS(error_log_time).str),
			"%02d:%02d:%02d.%06ld",
			tm.tm_hour, tm.tm_min, tm.tm_sec, tp.tv_nsec);
	if (ret < 0) {
		goto error;
	}

	return URCU_TLS(error_log_time).str;

error:
	/* Return an empty string on error so logging is not affected. */
	return "";
}

/*
 * Human readable error message.
 */
static const char *error_string_array[] = {
	/* LTTNG_OK code MUST be at the top for the ERROR_INDEX macro to work */
	[ ERROR_INDEX(LTTNG_OK) ] = "Success",
	[ ERROR_INDEX(LTTNG_ERR_UNK) ] = "Unknown error",
	[ ERROR_INDEX(LTTNG_ERR_UND) ] = "Undefined command",
	[ ERROR_INDEX(LTTNG_ERR_UNKNOWN_DOMAIN) ] = "Unknown tracing domain",
	[ ERROR_INDEX(LTTNG_ERR_NO_SESSION) ] = "No session found",
	[ ERROR_INDEX(LTTNG_ERR_CREATE_DIR_FAIL) ] = "Create directory failed",
	[ ERROR_INDEX(LTTNG_ERR_SESSION_FAIL) ] = "Create session failed",
	[ ERROR_INDEX(LTTNG_ERR_SESS_NOT_FOUND) ] = "Session name not found",
	[ ERROR_INDEX(LTTNG_ERR_FATAL) ] = "Fatal error of the session daemon",
	[ ERROR_INDEX(LTTNG_ERR_SELECT_SESS) ] = "A session MUST be selected",
	[ ERROR_INDEX(LTTNG_ERR_EXIST_SESS) ] = "Session name already exists",
	[ ERROR_INDEX(LTTNG_ERR_NO_EVENT) ] = "Event not found",
	[ ERROR_INDEX(LTTNG_ERR_CONNECT_FAIL) ] = "Unable to connect to Unix socket",
	[ ERROR_INDEX(LTTNG_ERR_EPERM) ] = "Permission denied",
	[ ERROR_INDEX(LTTNG_ERR_KERN_NA) ] = "Kernel tracer not available",
	[ ERROR_INDEX(LTTNG_ERR_KERN_VERSION) ] = "Kernel tracer version is not compatible",
	[ ERROR_INDEX(LTTNG_ERR_KERN_EVENT_EXIST) ] = "Kernel event already exists",
	[ ERROR_INDEX(LTTNG_ERR_KERN_SESS_FAIL) ] = "Kernel create session failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_EXIST) ] = "Kernel channel already exists",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_FAIL) ] = "Kernel create channel failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CONTEXT_FAIL) ] = "Add kernel context failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_ENABLE_FAIL) ] = "Enable kernel event failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_DISABLE_FAIL) ] = "Disable kernel event failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_META_FAIL) ] = "Opening metadata failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_START_FAIL) ] = "Starting kernel trace failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_STOP_FAIL) ] = "Stopping kernel trace failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_STREAM_FAIL) ] = "Kernel create stream failed",
	[ ERROR_INDEX(LTTNG_ERR_KERN_LIST_FAIL) ] = "Listing kernel events failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_CALIBRATE_FAIL) ] = "UST calibration failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_SESS_FAIL) ] = "UST create session failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_FAIL) ] = "UST create channel failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_EXIST) ] = "UST channel already exist",
	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_NOT_FOUND) ] = "UST channel not found",
	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_ENABLE_FAIL) ] = "Enable UST event failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_DISABLE_FAIL) ] = "Disable UST event failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_META_FAIL) ] = "Opening metadata failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_START_FAIL) ] = "Starting UST trace failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_STOP_FAIL) ] = "Stopping UST trace failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_STREAM_FAIL) ] = "UST create stream failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_LIST_FAIL) ] = "Listing UST events failed",
	[ ERROR_INDEX(LTTNG_ERR_UST_EVENT_EXIST) ] = "UST event already exist",
	[ ERROR_INDEX(LTTNG_ERR_UST_EVENT_NOT_FOUND)] = "UST event not found",
	[ ERROR_INDEX(LTTNG_ERR_UST_CONTEXT_EXIST)] = "UST context already exist",
	[ ERROR_INDEX(LTTNG_ERR_UST_CONTEXT_INVAL)] = "UST invalid context",
	[ 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.",
	[ ERROR_INDEX(LTTNG_ERR_NO_UST) ] = "LTTng-UST tracer is not supported. Please rebuild lttng-tools with lttng-ust support enabled.",
	[ ERROR_INDEX(LTTNG_ERR_TRACE_ALREADY_STARTED) ] = "Tracing has already been started once",
	[ ERROR_INDEX(LTTNG_ERR_TRACE_ALREADY_STOPPED) ] = "Tracing has already been stopped",
	[ ERROR_INDEX(LTTNG_ERR_KERN_EVENT_ENOSYS) ] = "Kernel event type not supported",
	[ ERROR_INDEX(LTTNG_ERR_NEED_CHANNEL_NAME) ] = "Non-default channel exists within session: channel name needs to be specified with '-c name'",
	[ ERROR_INDEX(LTTNG_ERR_INVALID) ] = "Invalid parameter",
	[ ERROR_INDEX(LTTNG_ERR_NO_USTCONSUMERD) ] = "No UST consumer detected",
	[ ERROR_INDEX(LTTNG_ERR_NO_KERNCONSUMERD) ] = "No kernel consumer detected",
	[ ERROR_INDEX(LTTNG_ERR_EVENT_EXIST_LOGLEVEL) ] = "Event already enabled with different loglevel",
	[ ERROR_INDEX(LTTNG_ERR_URL_DATA_MISS) ] = "Missing data path URL",
	[ ERROR_INDEX(LTTNG_ERR_URL_CTRL_MISS) ] = "Missing control path URL",
	[ ERROR_INDEX(LTTNG_ERR_ENABLE_CONSUMER_FAIL) ] = "Enabling consumer failed",
	[ ERROR_INDEX(LTTNG_ERR_RELAYD_CONNECT_FAIL) ] = "Unable to connect to lttng-relayd",
	[ ERROR_INDEX(LTTNG_ERR_RELAYD_VERSION_FAIL) ] = "Relay daemon not compatible",
	[ ERROR_INDEX(LTTNG_ERR_FILTER_INVAL) ] = "Invalid filter bytecode",
	[ ERROR_INDEX(LTTNG_ERR_FILTER_NOMEM) ] = "Not enough memory for filter bytecode",
	[ ERROR_INDEX(LTTNG_ERR_FILTER_EXIST) ] = "Filter already exist",
	[ ERROR_INDEX(LTTNG_ERR_NO_CONSUMER) ] = "Consumer not found for tracing session",
	[ ERROR_INDEX(LTTNG_ERR_NO_SESSIOND) ] = "No session daemon is available",
	[ ERROR_INDEX(LTTNG_ERR_SESSION_STARTED) ] = "Session is running",
	[ ERROR_INDEX(LTTNG_ERR_NOT_SUPPORTED) ] = "Operation not supported",
	[ ERROR_INDEX(LTTNG_ERR_UST_EVENT_ENABLED) ] = "UST event already enabled",
	[ ERROR_INDEX(LTTNG_ERR_SET_URL) ] = "Error setting URL",
	[ ERROR_INDEX(LTTNG_ERR_URL_EXIST) ] = "URL already exists",
	[ ERROR_INDEX(LTTNG_ERR_BUFFER_NOT_SUPPORTED)] = "Buffer type not supported",
	[ ERROR_INDEX(LTTNG_ERR_BUFFER_TYPE_MISMATCH)] = "Buffer type mismatch for session",
	[ ERROR_INDEX(LTTNG_ERR_NOMEM)] = "Not enough memory",
	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST) ] = "Snapshot output already exists",
	[ ERROR_INDEX(LTTNG_ERR_START_SESSION_ONCE) ] = "Session needs to be started once",
	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_FAIL) ] = "Snapshot record failed",
	[ ERROR_INDEX(LTTNG_ERR_CHAN_EXIST) ] = "Channel already exists",
	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_NODATA) ] = "No data available in snapshot",
	[ ERROR_INDEX(LTTNG_ERR_NO_CHANNEL) ] = "No channel found in the session",
	[ ERROR_INDEX(LTTNG_ERR_SESSION_INVALID_CHAR) ] = "Invalid character found in session name",
	[ ERROR_INDEX(LTTNG_ERR_SAVE_FILE_EXIST) ] = "Session file already exists",
	[ ERROR_INDEX(LTTNG_ERR_SAVE_IO_FAIL) ] = "IO error while writting session configuration",
	[ ERROR_INDEX(LTTNG_ERR_LOAD_INVALID_CONFIG) ] = "Invalid session configuration",
	[ ERROR_INDEX(LTTNG_ERR_LOAD_IO_FAIL) ] = "IO error while reading a session configuration",
	[ ERROR_INDEX(LTTNG_ERR_LOAD_SESSION_NOENT) ] = "Session file not found",
	[ ERROR_INDEX(LTTNG_ERR_MAX_SIZE_INVALID) ] = "Snapshot max size is invalid",
	[ ERROR_INDEX(LTTNG_ERR_MI_OUTPUT_TYPE) ] = "Invalid MI output format",
	[ ERROR_INDEX(LTTNG_ERR_MI_IO_FAIL) ] = "IO error while writing MI output",
	[ ERROR_INDEX(LTTNG_ERR_MI_NOT_IMPLEMENTED) ] = "Mi feature not implemented",
	[ ERROR_INDEX(LTTNG_ERR_INVALID_EVENT_NAME) ] = "Invalid event name",
	[ ERROR_INDEX(LTTNG_ERR_INVALID_CHANNEL_NAME) ] = "Invalid channel name",
	[ ERROR_INDEX(LTTNG_ERR_PID_TRACKED) ] = "PID already tracked",
	[ ERROR_INDEX(LTTNG_ERR_PID_NOT_TRACKED) ] = "PID not tracked",

	/* Last element */
	[ ERROR_INDEX(LTTNG_ERR_NR) ] = "Unknown error code"
};

/*
 * Return ptr to string representing a human readable error code from the
 * lttng_error_code enum.
 *
 * These code MUST be negative in other to treat that as an error value.
 */
LTTNG_HIDDEN
const char *error_get_str(int32_t code)
{
	code = -code;

	if (code < LTTNG_OK || code > LTTNG_ERR_NR) {
		code = LTTNG_ERR_NR;
	}

	return error_string_array[ERROR_INDEX(code)];
}
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#define _GNU_SOURCE
	19	#define _LGPL_SOURCE
	20	#include <assert.h>
	21	#include <inttypes.h>
	22
	23	#include <lttng/lttng-error.h>
	24	#include <common/common.h>
	25
	26	#include "error.h"
	27
	28	#define ERROR_INDEX(code) (code - LTTNG_OK)
	29
	30	/* TLS variable that contains the time of one single log entry. */
	31	DEFINE_URCU_TLS(struct log_time, error_log_time);
	32
	33	LTTNG_HIDDEN
	34	const char *log_add_time(void)
	35	{
	36	int ret;
	37	struct tm tm, *res;
	38	struct timespec tp;
	39	time_t now;
	40
	41	ret = clock_gettime(CLOCK_REALTIME, &tp);
	42	if (ret < 0) {
	43	goto error;
	44	}
	45	now = (time_t) tp.tv_sec;
	46
	47	res = localtime_r(&now, &tm);
	48	if (!res) {
	49	goto error;
	50	}
	51
	52	/* Format time in the TLS variable. */
	53	ret = snprintf(URCU_TLS(error_log_time).str, sizeof(URCU_TLS(error_log_time).str),
	54	"%02d:%02d:%02d.%06ld",
	55	tm.tm_hour, tm.tm_min, tm.tm_sec, tp.tv_nsec);
	56	if (ret < 0) {
	57	goto error;
	58	}
	59
	60	return URCU_TLS(error_log_time).str;
	61
	62	error:
	63	/* Return an empty string on error so logging is not affected. */
	64	return "";
	65	}
	66
	67	/*
	68	* Human readable error message.
	69	*/
	70	static const char *error_string_array[] = {
	71	/* LTTNG_OK code MUST be at the top for the ERROR_INDEX macro to work */
	72	[ ERROR_INDEX(LTTNG_OK) ] = "Success",
	73	[ ERROR_INDEX(LTTNG_ERR_UNK) ] = "Unknown error",
	74	[ ERROR_INDEX(LTTNG_ERR_UND) ] = "Undefined command",
	75	[ ERROR_INDEX(LTTNG_ERR_UNKNOWN_DOMAIN) ] = "Unknown tracing domain",
	76	[ ERROR_INDEX(LTTNG_ERR_NO_SESSION) ] = "No session found",
	77	[ ERROR_INDEX(LTTNG_ERR_CREATE_DIR_FAIL) ] = "Create directory failed",
	78	[ ERROR_INDEX(LTTNG_ERR_SESSION_FAIL) ] = "Create session failed",
	79	[ ERROR_INDEX(LTTNG_ERR_SESS_NOT_FOUND) ] = "Session name not found",
	80	[ ERROR_INDEX(LTTNG_ERR_FATAL) ] = "Fatal error of the session daemon",
	81	[ ERROR_INDEX(LTTNG_ERR_SELECT_SESS) ] = "A session MUST be selected",
	82	[ ERROR_INDEX(LTTNG_ERR_EXIST_SESS) ] = "Session name already exists",
	83	[ ERROR_INDEX(LTTNG_ERR_NO_EVENT) ] = "Event not found",
	84	[ ERROR_INDEX(LTTNG_ERR_CONNECT_FAIL) ] = "Unable to connect to Unix socket",
	85	[ ERROR_INDEX(LTTNG_ERR_EPERM) ] = "Permission denied",
	86	[ ERROR_INDEX(LTTNG_ERR_KERN_NA) ] = "Kernel tracer not available",
	87	[ ERROR_INDEX(LTTNG_ERR_KERN_VERSION) ] = "Kernel tracer version is not compatible",
	88	[ ERROR_INDEX(LTTNG_ERR_KERN_EVENT_EXIST) ] = "Kernel event already exists",
	89	[ ERROR_INDEX(LTTNG_ERR_KERN_SESS_FAIL) ] = "Kernel create session failed",
	90	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_EXIST) ] = "Kernel channel already exists",
	91	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_FAIL) ] = "Kernel create channel failed",
	92	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found",
	93	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed",
	94	[ ERROR_INDEX(LTTNG_ERR_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed",
	95	[ ERROR_INDEX(LTTNG_ERR_KERN_CONTEXT_FAIL) ] = "Add kernel context failed",
	96	[ ERROR_INDEX(LTTNG_ERR_KERN_ENABLE_FAIL) ] = "Enable kernel event failed",
	97	[ ERROR_INDEX(LTTNG_ERR_KERN_DISABLE_FAIL) ] = "Disable kernel event failed",
	98	[ ERROR_INDEX(LTTNG_ERR_KERN_META_FAIL) ] = "Opening metadata failed",
	99	[ ERROR_INDEX(LTTNG_ERR_KERN_START_FAIL) ] = "Starting kernel trace failed",
	100	[ ERROR_INDEX(LTTNG_ERR_KERN_STOP_FAIL) ] = "Stopping kernel trace failed",
	101	[ ERROR_INDEX(LTTNG_ERR_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed",
	102	[ ERROR_INDEX(LTTNG_ERR_KERN_STREAM_FAIL) ] = "Kernel create stream failed",
	103	[ ERROR_INDEX(LTTNG_ERR_KERN_LIST_FAIL) ] = "Listing kernel events failed",
	104	[ ERROR_INDEX(LTTNG_ERR_UST_CALIBRATE_FAIL) ] = "UST calibration failed",
	105	[ ERROR_INDEX(LTTNG_ERR_UST_SESS_FAIL) ] = "UST create session failed",
	106	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_FAIL) ] = "UST create channel failed",
	107	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_EXIST) ] = "UST channel already exist",
	108	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_NOT_FOUND) ] = "UST channel not found",
	109	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed",
	110	[ ERROR_INDEX(LTTNG_ERR_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed",
	111	[ ERROR_INDEX(LTTNG_ERR_UST_ENABLE_FAIL) ] = "Enable UST event failed",
	112	[ ERROR_INDEX(LTTNG_ERR_UST_DISABLE_FAIL) ] = "Disable UST event failed",
	113	[ ERROR_INDEX(LTTNG_ERR_UST_META_FAIL) ] = "Opening metadata failed",
	114	[ ERROR_INDEX(LTTNG_ERR_UST_START_FAIL) ] = "Starting UST trace failed",
	115	[ ERROR_INDEX(LTTNG_ERR_UST_STOP_FAIL) ] = "Stopping UST trace failed",
	116	[ ERROR_INDEX(LTTNG_ERR_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed",
	117	[ ERROR_INDEX(LTTNG_ERR_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed",
	118	[ ERROR_INDEX(LTTNG_ERR_UST_STREAM_FAIL) ] = "UST create stream failed",
	119	[ ERROR_INDEX(LTTNG_ERR_UST_LIST_FAIL) ] = "Listing UST events failed",
	120	[ ERROR_INDEX(LTTNG_ERR_UST_EVENT_EXIST) ] = "UST event already exist",
	121	[ ERROR_INDEX(LTTNG_ERR_UST_EVENT_NOT_FOUND)] = "UST event not found",
	122	[ ERROR_INDEX(LTTNG_ERR_UST_CONTEXT_EXIST)] = "UST context already exist",
	123	[ ERROR_INDEX(LTTNG_ERR_UST_CONTEXT_INVAL)] = "UST invalid context",
	124	[ 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.",
	125	[ ERROR_INDEX(LTTNG_ERR_NO_UST) ] = "LTTng-UST tracer is not supported. Please rebuild lttng-tools with lttng-ust support enabled.",
	126	[ ERROR_INDEX(LTTNG_ERR_TRACE_ALREADY_STARTED) ] = "Tracing has already been started once",
	127	[ ERROR_INDEX(LTTNG_ERR_TRACE_ALREADY_STOPPED) ] = "Tracing has already been stopped",
	128	[ ERROR_INDEX(LTTNG_ERR_KERN_EVENT_ENOSYS) ] = "Kernel event type not supported",
	129	[ ERROR_INDEX(LTTNG_ERR_NEED_CHANNEL_NAME) ] = "Non-default channel exists within session: channel name needs to be specified with '-c name'",
	130	[ ERROR_INDEX(LTTNG_ERR_INVALID) ] = "Invalid parameter",
	131	[ ERROR_INDEX(LTTNG_ERR_NO_USTCONSUMERD) ] = "No UST consumer detected",
	132	[ ERROR_INDEX(LTTNG_ERR_NO_KERNCONSUMERD) ] = "No kernel consumer detected",
	133	[ ERROR_INDEX(LTTNG_ERR_EVENT_EXIST_LOGLEVEL) ] = "Event already enabled with different loglevel",
	134	[ ERROR_INDEX(LTTNG_ERR_URL_DATA_MISS) ] = "Missing data path URL",
	135	[ ERROR_INDEX(LTTNG_ERR_URL_CTRL_MISS) ] = "Missing control path URL",
	136	[ ERROR_INDEX(LTTNG_ERR_ENABLE_CONSUMER_FAIL) ] = "Enabling consumer failed",
	137	[ ERROR_INDEX(LTTNG_ERR_RELAYD_CONNECT_FAIL) ] = "Unable to connect to lttng-relayd",
	138	[ ERROR_INDEX(LTTNG_ERR_RELAYD_VERSION_FAIL) ] = "Relay daemon not compatible",
	139	[ ERROR_INDEX(LTTNG_ERR_FILTER_INVAL) ] = "Invalid filter bytecode",
	140	[ ERROR_INDEX(LTTNG_ERR_FILTER_NOMEM) ] = "Not enough memory for filter bytecode",
	141	[ ERROR_INDEX(LTTNG_ERR_FILTER_EXIST) ] = "Filter already exist",
	142	[ ERROR_INDEX(LTTNG_ERR_NO_CONSUMER) ] = "Consumer not found for tracing session",
	143	[ ERROR_INDEX(LTTNG_ERR_NO_SESSIOND) ] = "No session daemon is available",
	144	[ ERROR_INDEX(LTTNG_ERR_SESSION_STARTED) ] = "Session is running",
	145	[ ERROR_INDEX(LTTNG_ERR_NOT_SUPPORTED) ] = "Operation not supported",
	146	[ ERROR_INDEX(LTTNG_ERR_UST_EVENT_ENABLED) ] = "UST event already enabled",
	147	[ ERROR_INDEX(LTTNG_ERR_SET_URL) ] = "Error setting URL",
	148	[ ERROR_INDEX(LTTNG_ERR_URL_EXIST) ] = "URL already exists",
	149	[ ERROR_INDEX(LTTNG_ERR_BUFFER_NOT_SUPPORTED)] = "Buffer type not supported",
	150	[ ERROR_INDEX(LTTNG_ERR_BUFFER_TYPE_MISMATCH)] = "Buffer type mismatch for session",
	151	[ ERROR_INDEX(LTTNG_ERR_NOMEM)] = "Not enough memory",
	152	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST) ] = "Snapshot output already exists",
	153	[ ERROR_INDEX(LTTNG_ERR_START_SESSION_ONCE) ] = "Session needs to be started once",
	154	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_FAIL) ] = "Snapshot record failed",
	155	[ ERROR_INDEX(LTTNG_ERR_CHAN_EXIST) ] = "Channel already exists",
	156	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_NODATA) ] = "No data available in snapshot",
	157	[ ERROR_INDEX(LTTNG_ERR_NO_CHANNEL) ] = "No channel found in the session",
	158	[ ERROR_INDEX(LTTNG_ERR_SESSION_INVALID_CHAR) ] = "Invalid character found in session name",
	159	[ ERROR_INDEX(LTTNG_ERR_SAVE_FILE_EXIST) ] = "Session file already exists",
	160	[ ERROR_INDEX(LTTNG_ERR_SAVE_IO_FAIL) ] = "IO error while writting session configuration",
	161	[ ERROR_INDEX(LTTNG_ERR_LOAD_INVALID_CONFIG) ] = "Invalid session configuration",
	162	[ ERROR_INDEX(LTTNG_ERR_LOAD_IO_FAIL) ] = "IO error while reading a session configuration",
	163	[ ERROR_INDEX(LTTNG_ERR_LOAD_SESSION_NOENT) ] = "Session file not found",
	164	[ ERROR_INDEX(LTTNG_ERR_MAX_SIZE_INVALID) ] = "Snapshot max size is invalid",
	165	[ ERROR_INDEX(LTTNG_ERR_MI_OUTPUT_TYPE) ] = "Invalid MI output format",
	166	[ ERROR_INDEX(LTTNG_ERR_MI_IO_FAIL) ] = "IO error while writing MI output",
	167	[ ERROR_INDEX(LTTNG_ERR_MI_NOT_IMPLEMENTED) ] = "Mi feature not implemented",
	168	[ ERROR_INDEX(LTTNG_ERR_INVALID_EVENT_NAME) ] = "Invalid event name",
	169	[ ERROR_INDEX(LTTNG_ERR_INVALID_CHANNEL_NAME) ] = "Invalid channel name",
	170	[ ERROR_INDEX(LTTNG_ERR_PID_TRACKED) ] = "PID already tracked",
	171	[ ERROR_INDEX(LTTNG_ERR_PID_NOT_TRACKED) ] = "PID not tracked",
	172
	173	/* Last element */
	174	[ ERROR_INDEX(LTTNG_ERR_NR) ] = "Unknown error code"
	175	};
	176
	177	/*
	178	* Return ptr to string representing a human readable error code from the
	179	* lttng_error_code enum.
	180	*
	181	* These code MUST be negative in other to treat that as an error value.
	182	*/
	183	LTTNG_HIDDEN
	184	const char *error_get_str(int32_t code)
	185	{
	186	code = -code;
	187
	188	if (code < LTTNG_OK \|\| code > LTTNG_ERR_NR) {
	189	code = LTTNG_ERR_NR;
	190	}
	191
	192	return error_string_array[ERROR_INDEX(code)];
	193	}