f8c0a1d06198bf218687a0ed8e67f3036ecba5d5
[lttng-tools.git] / src / common / error.h
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
26 #ifndef _GNU_SOURCE
27 #error "lttng-tools error.h needs _GNU_SOURCE"
28 #endif
29
30 #include <lttng/lttng-error.h>
31 #include <common/compat/tid.h>
32
33 /* Stringify the expansion of a define */
34 #define XSTR(d) STR(d)
35 #define STR(s) #s
36
37 extern int lttng_opt_quiet;
38 extern int lttng_opt_verbose;
39
40 /* Error type. */
41 #define PRINT_ERR 0x1
42 #define PRINT_WARN 0x2
43 #define PRINT_BUG 0x3
44 #define PRINT_MSG 0x4
45 #define PRINT_DBG 0x10
46 #define PRINT_DBG2 0x20
47 #define PRINT_DBG3 0x30
48
49 /*
50 * Macro for printing message depending on command line option and verbosity.
51 */
52 #define __lttng_print(type, fmt, args...) \
53 do { \
54 if (lttng_opt_quiet == 0 && type == PRINT_MSG) { \
55 fprintf(stdout, fmt, ## args); \
56 } else if (lttng_opt_quiet == 0 && \
57 (((type & PRINT_DBG) && lttng_opt_verbose == 1) || \
58 ((type & (PRINT_DBG | PRINT_DBG2)) && \
59 lttng_opt_verbose == 2) || \
60 ((type & (PRINT_DBG | PRINT_DBG2 | PRINT_DBG3)) && \
61 lttng_opt_verbose == 3))) { \
62 fprintf(stderr, fmt, ## args); \
63 } else if (lttng_opt_quiet == 0 && (type & (PRINT_WARN))) { \
64 fprintf(stderr, fmt, ## args); \
65 } else if (type & (PRINT_ERR | PRINT_BUG)) { \
66 fprintf(stderr, fmt, ## args); \
67 } \
68 } while (0);
69
70 /* Three level of debug. Use -v, -vv or -vvv for the levels */
71 #define _ERRMSG(msg, type, fmt, args...) __lttng_print(type, msg \
72 " [%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", \
73 (long) getpid(), (long) gettid(), ## args, __func__)
74
75 #define MSG(fmt, args...) \
76 __lttng_print(PRINT_MSG, fmt "\n", ## args)
77 #define _MSG(fmt, args...) \
78 __lttng_print(PRINT_MSG, fmt, ## args)
79 #define ERR(fmt, args...) \
80 __lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
81 #define WARN(fmt, args...) \
82 __lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)
83
84 #define BUG(fmt, args...) _ERRMSG("BUG", PRINT_BUG, fmt, ## args)
85
86 #define DBG(fmt, args...) _ERRMSG("DEBUG1", PRINT_DBG, fmt, ## args)
87 #define DBG2(fmt, args...) _ERRMSG("DEBUG2", PRINT_DBG2, fmt, ## args)
88 #define DBG3(fmt, args...) _ERRMSG("DEBUG3", PRINT_DBG3, fmt, ## args)
89
90 #define _PERROR(fmt, args...) _ERRMSG("PERROR", PRINT_ERR, fmt, ## args)
91
92 #if !defined(__linux__) || ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE))
93
94 /*
95 * Version using XSI strerror_r.
96 */
97 #define PERROR(call, args...) \
98 do { \
99 char buf[200]; \
100 strerror_r(errno, buf, sizeof(buf)); \
101 _PERROR(call ": %s", ## args, buf); \
102 } while(0);
103 #else
104 /*
105 * Version using GNU strerror_r, for linux with appropriate defines.
106 */
107 #define PERROR(call, args...) \
108 do { \
109 char *buf; \
110 char tmp[200]; \
111 buf = strerror_r(errno, tmp, sizeof(tmp)); \
112 _PERROR(call ": %s", ## args, buf); \
113 } while(0);
114 #endif
115
116 const char *error_get_str(int32_t code);
117
118 #endif /* _ERROR_H */
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