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

/*
 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#define _LGPL_SOURCE
#include <assert.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

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

#include "error.h"

#define ERROR_INDEX(code) (code - LTTNG_OK)

/*
 * lttng_opt_abort_on_error: unset: -1, disabled: 0, enabled: 1.
 * Controlled by the LTTNG_ABORT_ON_ERROR environment variable.
 */
static int lttng_opt_abort_on_error = -1;

/* 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;
	const int errsv = errno;

	ret = lttng_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.%09ld",
			tm.tm_hour, tm.tm_min, tm.tm_sec, tp.tv_nsec);
	if (ret < 0) {
		goto error;
	}

	errno = errsv;
	return URCU_TLS(error_log_time).str;

error:
	/* Return an empty string on error so logging is not affected. */
	errno = errsv;
	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 writing 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_ID_TRACKED) ] = "ID already tracked",
	[ ERROR_INDEX(LTTNG_ERR_ID_NOT_TRACKED) ] = "ID not tracked",
	[ ERROR_INDEX(LTTNG_ERR_INVALID_CHANNEL_DOMAIN) ] = "Invalid channel domain",
	[ ERROR_INDEX(LTTNG_ERR_OVERFLOW) ] = "Overflow occurred",
	[ ERROR_INDEX(LTTNG_ERR_SESSION_NOT_STARTED) ] = "Session not started",
	[ ERROR_INDEX(LTTNG_ERR_LIVE_SESSION) ] = "Live sessions are not supported",
	[ ERROR_INDEX(LTTNG_ERR_PER_PID_SESSION) ] = "Per-PID tracing sessions are not supported",
	[ ERROR_INDEX(LTTNG_ERR_KERN_CONTEXT_UNAVAILABLE) ] = "Context unavailable on this kernel",
	[ ERROR_INDEX(LTTNG_ERR_REGEN_STATEDUMP_FAIL) ] = "Failed to regenerate the state dump",
	[ ERROR_INDEX(LTTNG_ERR_REGEN_STATEDUMP_NOMEM) ] = "Failed to regenerate the state dump, not enough memory",
	[ ERROR_INDEX(LTTNG_ERR_NOT_SNAPSHOT_SESSION) ] = "Snapshot command can't be applied to a non-snapshot session",
	[ ERROR_INDEX(LTTNG_ERR_INVALID_TRIGGER) ] = "Invalid trigger",
	[ ERROR_INDEX(LTTNG_ERR_TRIGGER_EXISTS) ] = "Trigger already registered",
	[ ERROR_INDEX(LTTNG_ERR_TRIGGER_NOT_FOUND) ] = "Trigger not found",
	[ ERROR_INDEX(LTTNG_ERR_COMMAND_CANCELLED) ] = "Command cancelled",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_PENDING) ] = "Rotation already pending for this session",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_NOT_AVAILABLE) ] = "Rotation feature not available for this session's creation mode",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_SCHEDULE_SET) ] = "A session rotation schedule of this type is already set on the session",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET) ] = "No session rotation schedule of this type is set on the session",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP) ] = "Session was already rotated once since it became inactive",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_WRONG_VERSION) ] = "Session rotation is not supported by this kernel tracer version",
	[ ERROR_INDEX(LTTNG_ERR_NO_SESSION_OUTPUT) ] = "Session has no output",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY) ] = "Rotation feature not available on the relay",
	[ ERROR_INDEX(LTTNG_ERR_AGENT_TRACING_DISABLED) ] = "Session daemon agent tracing is disabled",
	[ ERROR_INDEX(LTTNG_ERR_PROBE_LOCATION_INVAL) ] = "Invalid userspace probe location",
	[ ERROR_INDEX(LTTNG_ERR_ELF_PARSING) ] = "ELF parsing error",
	[ ERROR_INDEX(LTTNG_ERR_SDT_PROBE_SEMAPHORE) ] = "SDT probe guarded by a semaphore",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_FAIL_CONSUMER) ] = "Rotation failure on consumer",
	[ ERROR_INDEX(LTTNG_ERR_ROTATE_RENAME_FAIL_CONSUMER) ] = "Rotation rename failure on consumer",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_PENDING_LOCAL_FAIL_CONSUMER) ] = "Rotation pending check (local) failure on consumer",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_PENDING_RELAY_FAIL_CONSUMER) ] = "Rotation pending check (relay) failure on consumer",
	[ ERROR_INDEX(LTTNG_ERR_MKDIR_FAIL_CONSUMER) ] = "Directory creation failure on consumer",
	[ ERROR_INDEX(LTTNG_ERR_CHAN_NOT_FOUND) ] = "Channel not found",
	[ ERROR_INDEX(LTTNG_ERR_SNAPSHOT_UNSUPPORTED) ] = "Session configuration does not allow the use of snapshots",
	[ ERROR_INDEX(LTTNG_ERR_SESSION_NOT_EXIST) ] = "Tracing session does not exist",
	[ ERROR_INDEX(LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER) ] = "Trace chunk creation failed on consumer",
	[ ERROR_INDEX(LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER) ] = "Trace chunk close failed on consumer",
	[ ERROR_INDEX(LTTNG_ERR_TRACE_CHUNK_EXISTS_FAIL_CONSUMER) ] = "Failed to query consumer for trace chunk existence",
	[ ERROR_INDEX(LTTNG_ERR_INVALID_PROTOCOL) ] = "Protocol error occurred",
	[ ERROR_INDEX(LTTNG_ERR_FILE_CREATION_ERROR) ] = "Failed to create file",
	[ ERROR_INDEX(LTTNG_ERR_TIMER_STOP_ERROR) ] = "Failed to stop a timer",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) ] = "Rotation feature not supported by the kernel tracer.",
	[ ERROR_INDEX(LTTNG_ERR_CLEAR_RELAY_DISALLOWED) ] = "Relayd daemon peer does not allow sessions to be cleared",
	[ ERROR_INDEX(LTTNG_ERR_CLEAR_NOT_AVAILABLE_RELAY) ] = "Clearing a session is not supported by the relay daemon",
	[ ERROR_INDEX(LTTNG_ERR_CLEAR_FAIL_CONSUMER) ] = "Consumer failed to clear the session",
	[ ERROR_INDEX(LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR) ] = "Session was already cleared since it became inactive",
	[ ERROR_INDEX(LTTNG_ERR_USER_NOT_FOUND) ] = "User not found",
	[ ERROR_INDEX(LTTNG_ERR_GROUP_NOT_FOUND) ] = "Group not found",

	/* 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)];
}

LTTNG_HIDDEN
void lttng_abort_on_error(void)
{
	if (lttng_opt_abort_on_error < 0) {
		/* Use lttng_secure_getenv() to query its state. */
		const char *value;

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