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a09dac63 PMF |
1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * | |
3 | * This library is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public | |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
59b161cd PMF |
18 | #ifndef USTERR_H |
19 | #define USTERR_H | |
20 | ||
d61bfa72 | 21 | #include <string.h> |
dd80aafe PMF |
22 | #include <sys/types.h> |
23 | #include <sys/syscall.h> | |
24 | #include <errno.h> | |
ff1fedb9 | 25 | #include <stdarg.h> |
c1f20530 | 26 | #include <stdio.h> |
ff1fedb9 PMF |
27 | |
28 | #include "share.h" | |
d61bfa72 | 29 | |
2028e7fd PMF |
30 | #ifndef UST_COMPONENT |
31 | //#error UST_COMPONENT is undefined | |
32 | #define UST_COMPONENT libust | |
33 | #endif | |
34 | ||
35 | /* To stringify the expansion of a define */ | |
36 | #define XSTR(d) STR(d) | |
37 | #define STR(s) #s | |
38 | ||
ff1fedb9 PMF |
39 | /* We sometimes print in the tracing path, and tracing can occur in |
40 | * signal handlers, so we must use a print method which is signal safe. | |
41 | */ | |
42 | ||
bf0d695d PMF |
43 | extern int ust_safe_snprintf(char *str, size_t n, const char *fmt, ...); |
44 | ||
ff1fedb9 PMF |
45 | #define sigsafe_print_err(fmt, args...) \ |
46 | { \ | |
47 | /* Can't use dynamic allocation. Limit ourselves to 250 chars. */ \ | |
48 | char ____buf[250]; \ | |
49 | int ____saved_errno; \ | |
50 | \ | |
51 | /* Save the errno. */ \ | |
52 | ____saved_errno = errno; \ | |
53 | \ | |
bf0d695d | 54 | ust_safe_snprintf(____buf, sizeof(____buf), fmt, ## args); \ |
ff1fedb9 PMF |
55 | \ |
56 | /* Add end of string in case of buffer overflow. */ \ | |
57 | ____buf[sizeof(____buf)-1] = 0; \ | |
58 | \ | |
59 | patient_write(STDERR_FILENO, ____buf, strlen(____buf)); \ | |
60 | /* Can't print errors because we are in the error printing code path. */ \ | |
61 | \ | |
62 | /* Restore errno, in order to be async-signal safe. */ \ | |
63 | errno = ____saved_errno; \ | |
64 | } | |
65 | ||
2028e7fd PMF |
66 | #define UST_STR_COMPONENT XSTR(UST_COMPONENT) |
67 | ||
38f015df | 68 | #define ERRMSG(fmt, args...) do { sigsafe_print_err(UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", (long) getpid(), (long) syscall(SYS_gettid), ## args, __func__); fflush(stderr); } while(0) |
dd80aafe | 69 | |
02549014 | 70 | #ifdef UST_DEBUG |
dd80aafe | 71 | # define DBG(fmt, args...) ERRMSG(fmt, ## args) |
106e716d | 72 | # define DBG_raw(fmt, args...) do { sigsafe_print_err(fmt, ## args); fflush(stderr); } while(0) |
17674885 PMF |
73 | #else |
74 | # define DBG(fmt, args...) do {} while(0) | |
106e716d | 75 | # define DBG_raw(fmt, args...) do {} while(0) |
17674885 | 76 | #endif |
dd80aafe PMF |
77 | #define WARN(fmt, args...) ERRMSG("Warning: " fmt, ## args) |
78 | #define ERR(fmt, args...) ERRMSG("Error: " fmt, ## args) | |
79 | #define BUG(fmt, args...) ERRMSG("BUG: " fmt, ## args) | |
d61bfa72 PMF |
80 | |
81 | #if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE) | |
82 | #define PERROR(call, args...)\ | |
83 | do { \ | |
84 | char buf[200] = "Error in strerror_r()"; \ | |
85 | strerror_r(errno, buf, sizeof(buf)); \ | |
dd80aafe | 86 | ERRMSG("Error: " call ": %s", ## args, buf); \ |
d61bfa72 PMF |
87 | } while(0); |
88 | #else | |
89 | #define PERROR(call, args...)\ | |
90 | do { \ | |
91 | char *buf; \ | |
92 | char tmp[200]; \ | |
93 | buf = strerror_r(errno, tmp, sizeof(tmp)); \ | |
dd80aafe | 94 | ERRMSG("Error: " call ": %s", ## args, buf); \ |
d61bfa72 PMF |
95 | } while(0); |
96 | #endif | |
c9b64079 PMF |
97 | |
98 | #define BUG_ON(condition) do { if (unlikely(condition)) ERR("condition not respected (BUG)"); } while(0) | |
5f54827b | 99 | #define WARN_ON(condition) do { if (unlikely(condition)) WARN("condition not respected on line %s:%d", __FILE__, __LINE__); } while(0) |
d6322067 | 100 | #define WARN_ON_ONCE(condition) WARN_ON(condition) |
c9b64079 | 101 | |
59b161cd | 102 | #endif /* USTERR_H */ |