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

/*
 * Copyright (C)  2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * 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.
 */

#ifndef _ERROR_H
#define _ERROR_H

#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <urcu/tls-compat.h>
#include <common/compat/time.h>

#ifndef _GNU_SOURCE
#error "lttng-tools error.h needs _GNU_SOURCE"
#endif

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

/* Avoid conflict with Solaris <sys/regset.h> */
#if defined(ERR) && defined(__sun__)
#undef ERR
#endif

/* Stringify the expansion of a define */
#define XSTR(d) STR(d)
#define STR(s) #s

/*
 * Contains the string of the log entry time. This is used as a thread local
 * storage so we don't race between thread and also avoid memory allocation
 * every time a log is fired.
 */
struct log_time {
	/* Format: 00:00:00.000000000 plus NULL byte. */
	char str[19];
};
extern DECLARE_URCU_TLS(struct log_time, error_log_time);

extern int lttng_opt_quiet;
extern int lttng_opt_verbose;
extern int lttng_opt_mi;

/* Error type. */
enum lttng_error_level {
	PRINT_ERR =	0,
	PRINT_BUG =	1,
	PRINT_WARN =	2,
	PRINT_MSG =	3,
	PRINT_DBG =	4,
	PRINT_DBG2 =	5,
	PRINT_DBG3 =	6,
};

static inline bool __lttng_print_check_opt(enum lttng_error_level type)
{
	/* lttng_opt_mi and lttng_opt_quiet. */
	switch (type) {
	case PRINT_DBG3:
	case PRINT_DBG2:
	case PRINT_DBG:
	case PRINT_MSG:
		if (lttng_opt_mi) {
			return false;
		}
		/* Fall-through. */
	case PRINT_WARN:
	case PRINT_BUG:
	case PRINT_ERR:
		if (lttng_opt_quiet) {
			return false;
		}
	}

	/* lttng_opt_verbose */
	switch (type) {
	case PRINT_DBG3:
		if (lttng_opt_verbose < 3) {
			return false;
		}
		break;
	case PRINT_DBG2:
		if (lttng_opt_verbose < 2) {
			return false;
		}
		break;
	case PRINT_DBG:
		if (lttng_opt_verbose < 1) {
			return false;
		}
		break;
	case PRINT_MSG:
	case PRINT_WARN:
	case PRINT_BUG:
	case PRINT_ERR:
		break;
	}

	return true;
}

void lttng_abort_on_error(void);

static inline void __lttng_print_check_abort(enum lttng_error_level type)
{
	switch (type) {
	case PRINT_DBG3:
	case PRINT_DBG2:
	case PRINT_DBG:
	case PRINT_MSG:
	case PRINT_WARN:
		break;
	case PRINT_BUG:
	case PRINT_ERR:
		lttng_abort_on_error();
	}
}

/*
 * Macro for printing message depending on command line option and verbosity.
 *
 * Machine interface:
 * We use lttng_opt_mi to suppress all normal msg to stdout. We don't
 * want any nested msg to show up when printing mi to stdout(if it's the case).
 * All warnings and errors should be printed to stderr as normal.
 */
#define __lttng_print(type, fmt, args...)						\
	do {										\
		if (__lttng_print_check_opt(type)) {					\
			fprintf((type) == PRINT_MSG ? stdout : stderr, fmt, ## args);	\
		}									\
		__lttng_print_check_abort(type);					\
	} while (0)

/* Three level of debug. Use -v, -vv or -vvv for the levels */
#define _ERRMSG(msg, type, fmt, args...) __lttng_print(type, msg \
		" - %s [%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", \
			log_add_time(), (long) getpid(), (long) gettid(), ## args, __func__)

#define _ERRMSG_NO_LOC(msg, type, fmt, args...) __lttng_print(type, msg	\
		" - %s [%ld/%ld]: " fmt "\n", \
			log_add_time(), (long) getpid(), (long) gettid(), ## args)

#define MSG(fmt, args...) \
	__lttng_print(PRINT_MSG, fmt "\n", ## args)
#define _MSG(fmt, args...) \
	__lttng_print(PRINT_MSG, fmt, ## args)
#define ERR(fmt, args...) \
	__lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
#define WARN(fmt, args...) \
	__lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)

#define BUG(fmt, args...) _ERRMSG("BUG", PRINT_BUG, fmt, ## args)

#define DBG(fmt, args...) _ERRMSG("DEBUG1", PRINT_DBG, fmt, ## args)
#define DBG_NO_LOC(fmt, args...) _ERRMSG_NO_LOC("DEBUG1", PRINT_DBG, fmt, ## args)
#define DBG2(fmt, args...) _ERRMSG("DEBUG2", PRINT_DBG2, fmt, ## args)
#define DBG3(fmt, args...) _ERRMSG("DEBUG3", PRINT_DBG3, fmt, ## args)
#define LOG(type, fmt, args...)			\
	do {					\
		switch (type) {			\
		case PRINT_ERR:			\
			ERR(fmt, ## args);	\
			break;			\
		case PRINT_WARN:		\
			WARN(fmt, ## args);	\
			break;			\
		case PRINT_BUG:			\
			BUG(fmt, ## args);	\
			break;			\
		case PRINT_MSG:			\
			MSG(fmt, ## args);	\
			break;			\
		case PRINT_DBG:			\
			DBG(fmt, ## args);	\
			break;			\
		case PRINT_DBG2:		\
			DBG2(fmt, ## args);	\
			break;			\
		case PRINT_DBG3:		\
			DBG3(fmt, ## args);	\
			break;			\
		default:			\
			assert(0);		\
		}				\
	} while(0);

#define _PERROR(fmt, args...) _ERRMSG("PERROR", PRINT_ERR, fmt, ## args)

#if !defined(__GLIBC__) || ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE))

/*
 * Version using XSI strerror_r.
 */
#define PERROR(call, args...) \
	do { \
		char buf[200]; \
		strerror_r(errno, buf, sizeof(buf)); \
		_PERROR(call ": %s", ## args, buf); \
	} while(0);
#else
/*
 * Version using GNU strerror_r, for linux with appropriate defines.
 */
#define PERROR(call, args...) \
	do { \
		char *buf; \
		char tmp[200]; \
		buf = strerror_r(errno, tmp, sizeof(tmp)); \
		_PERROR(call ": %s", ## args, buf); \
	} while(0);
#endif

const char *error_get_str(int32_t code);

/*
 * Function that format the time and return the reference of log_time.str to
 * the caller. On error, an empty string is returned thus no time will be
 * printed in the log.
 */
const char *log_add_time();

#endif /* _ERROR_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as 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
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#ifndef _ERROR_H
	19	#define _ERROR_H
	20
	21	#include <errno.h>
	22	#include <stdio.h>
	23	#include <stdint.h>
	24	#include <string.h>
	25	#include <stdbool.h>
	26	#include <urcu/tls-compat.h>
	27	#include <common/compat/time.h>
	28
	29	#ifndef _GNU_SOURCE
	30	#error "lttng-tools error.h needs _GNU_SOURCE"
	31	#endif
	32
	33	#include <lttng/lttng-error.h>
	34	#include <common/compat/tid.h>
	35
	36	/* Avoid conflict with Solaris <sys/regset.h> */
	37	#if defined(ERR) && defined(__sun__)
	38	#undef ERR
	39	#endif
	40
	41	/* Stringify the expansion of a define */
	42	#define XSTR(d) STR(d)
	43	#define STR(s) #s
	44
	45	/*
	46	* Contains the string of the log entry time. This is used as a thread local
	47	* storage so we don't race between thread and also avoid memory allocation
	48	* every time a log is fired.
	49	*/
	50	struct log_time {
	51	/* Format: 00:00:00.000000000 plus NULL byte. */
	52	char str[19];
	53	};
	54	extern DECLARE_URCU_TLS(struct log_time, error_log_time);
	55
	56	extern int lttng_opt_quiet;
	57	extern int lttng_opt_verbose;
	58	extern int lttng_opt_mi;
	59
	60	/* Error type. */
	61	enum lttng_error_level {
	62	PRINT_ERR = 0,
	63	PRINT_BUG = 1,
	64	PRINT_WARN = 2,
	65	PRINT_MSG = 3,
	66	PRINT_DBG = 4,
	67	PRINT_DBG2 = 5,
	68	PRINT_DBG3 = 6,
	69	};
	70
	71	static inline bool __lttng_print_check_opt(enum lttng_error_level type)
	72	{
	73	/* lttng_opt_mi and lttng_opt_quiet. */
	74	switch (type) {
	75	case PRINT_DBG3:
	76	case PRINT_DBG2:
	77	case PRINT_DBG:
	78	case PRINT_MSG:
	79	if (lttng_opt_mi) {
	80	return false;
	81	}
	82	/* Fall-through. */
	83	case PRINT_WARN:
	84	case PRINT_BUG:
	85	case PRINT_ERR:
	86	if (lttng_opt_quiet) {
	87	return false;
	88	}
	89	}
	90
	91	/* lttng_opt_verbose */
	92	switch (type) {
	93	case PRINT_DBG3:
	94	if (lttng_opt_verbose < 3) {
	95	return false;
	96	}
	97	break;
	98	case PRINT_DBG2:
	99	if (lttng_opt_verbose < 2) {
	100	return false;
	101	}
	102	break;
	103	case PRINT_DBG:
	104	if (lttng_opt_verbose < 1) {
	105	return false;
	106	}
	107	break;
	108	case PRINT_MSG:
	109	case PRINT_WARN:
	110	case PRINT_BUG:
	111	case PRINT_ERR:
	112	break;
	113	}
	114
	115	return true;
	116	}
	117
	118	void lttng_abort_on_error(void);
	119
	120	static inline void __lttng_print_check_abort(enum lttng_error_level type)
	121	{
	122	switch (type) {
	123	case PRINT_DBG3:
	124	case PRINT_DBG2:
	125	case PRINT_DBG:
	126	case PRINT_MSG:
	127	case PRINT_WARN:
	128	break;
	129	case PRINT_BUG:
	130	case PRINT_ERR:
	131	lttng_abort_on_error();
	132	}
	133	}
	134
	135	/*
	136	* Macro for printing message depending on command line option and verbosity.
	137	*
	138	* Machine interface:
	139	* We use lttng_opt_mi to suppress all normal msg to stdout. We don't
	140	* want any nested msg to show up when printing mi to stdout(if it's the case).
	141	* All warnings and errors should be printed to stderr as normal.
	142	*/
	143	#define __lttng_print(type, fmt, args...) \
	144	do { \
	145	if (__lttng_print_check_opt(type)) { \
	146	fprintf((type) == PRINT_MSG ? stdout : stderr, fmt, ## args); \
	147	} \
	148	__lttng_print_check_abort(type); \
	149	} while (0)
	150
	151	/* Three level of debug. Use -v, -vv or -vvv for the levels */
	152	#define _ERRMSG(msg, type, fmt, args...) __lttng_print(type, msg \
	153	" - %s [%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", \
	154	log_add_time(), (long) getpid(), (long) gettid(), ## args, __func__)
	155
	156	#define _ERRMSG_NO_LOC(msg, type, fmt, args...) __lttng_print(type, msg \
	157	" - %s [%ld/%ld]: " fmt "\n", \
	158	log_add_time(), (long) getpid(), (long) gettid(), ## args)
	159
	160	#define MSG(fmt, args...) \
	161	__lttng_print(PRINT_MSG, fmt "\n", ## args)
	162	#define _MSG(fmt, args...) \
	163	__lttng_print(PRINT_MSG, fmt, ## args)
	164	#define ERR(fmt, args...) \
	165	__lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
	166	#define WARN(fmt, args...) \
	167	__lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)
	168
	169	#define BUG(fmt, args...) _ERRMSG("BUG", PRINT_BUG, fmt, ## args)
	170
	171	#define DBG(fmt, args...) _ERRMSG("DEBUG1", PRINT_DBG, fmt, ## args)
	172	#define DBG_NO_LOC(fmt, args...) _ERRMSG_NO_LOC("DEBUG1", PRINT_DBG, fmt, ## args)
	173	#define DBG2(fmt, args...) _ERRMSG("DEBUG2", PRINT_DBG2, fmt, ## args)
	174	#define DBG3(fmt, args...) _ERRMSG("DEBUG3", PRINT_DBG3, fmt, ## args)
	175	#define LOG(type, fmt, args...) \
	176	do { \
	177	switch (type) { \
	178	case PRINT_ERR: \
	179	ERR(fmt, ## args); \
	180	break; \
	181	case PRINT_WARN: \
	182	WARN(fmt, ## args); \
	183	break; \
	184	case PRINT_BUG: \
	185	BUG(fmt, ## args); \
	186	break; \
	187	case PRINT_MSG: \
	188	MSG(fmt, ## args); \
	189	break; \
	190	case PRINT_DBG: \
	191	DBG(fmt, ## args); \
	192	break; \
	193	case PRINT_DBG2: \
	194	DBG2(fmt, ## args); \
	195	break; \
	196	case PRINT_DBG3: \
	197	DBG3(fmt, ## args); \
	198	break; \
	199	default: \
	200	assert(0); \
	201	} \
	202	} while(0);
	203
	204	#define _PERROR(fmt, args...) _ERRMSG("PERROR", PRINT_ERR, fmt, ## args)
	205
	206	#if !defined(__GLIBC__) \|\| ((_POSIX_C_SOURCE >= 200112L \|\| _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE))
	207
	208	/*
	209	* Version using XSI strerror_r.
	210	*/
	211	#define PERROR(call, args...) \
	212	do { \
	213	char buf[200]; \
	214	strerror_r(errno, buf, sizeof(buf)); \
	215	_PERROR(call ": %s", ## args, buf); \
	216	} while(0);
	217	#else
	218	/*
	219	* Version using GNU strerror_r, for linux with appropriate defines.
	220	*/
	221	#define PERROR(call, args...) \
	222	do { \
	223	char *buf; \
	224	char tmp[200]; \
	225	buf = strerror_r(errno, tmp, sizeof(tmp)); \
	226	_PERROR(call ": %s", ## args, buf); \
	227	} while(0);
	228	#endif
	229
	230	const char *error_get_str(int32_t code);
	231
	232	/*
	233	* Function that format the time and return the reference of log_time.str to
	234	* the caller. On error, an empty string is returned thus no time will be
	235	* printed in the log.
	236	*/
	237	const char *log_add_time();
	238
	239	#endif /* _ERROR_H */