projects / ust.git / blame
| Commit | Line | Data |
|---|---|---|
| 59b161cd PMF |
1 | #ifndef USTERR_H |
| 2 | #define USTERR_H | |
| 3 | ||
| d61bfa72 | 4 | #include <string.h> |
| dd80aafe PMF |
5 | #include <sys/types.h> |
| 6 | #include <sys/syscall.h> | |
| 7 | #include <errno.h> | |
| ff1fedb9 | 8 | #include <stdarg.h> |
| c1f20530 | 9 | #include <stdio.h> |
| ff1fedb9 PMF |
10 | |
| 11 | #include "share.h" | |
| d61bfa72 | 12 | |
| 2028e7fd PMF |
13 | #ifndef UST_COMPONENT |
| 14 | //#error UST_COMPONENT is undefined | |
| 15 | #define UST_COMPONENT libust | |
| 16 | #endif | |
| 17 | ||
| 18 | /* To stringify the expansion of a define */ | |
| 19 | #define XSTR(d) STR(d) | |
| 20 | #define STR(s) #s | |
| 21 | ||
| ff1fedb9 PMF |
22 | /* We sometimes print in the tracing path, and tracing can occur in |
| 23 | * signal handlers, so we must use a print method which is signal safe. | |
| 24 | */ | |
| 25 | ||
| 26 | #define sigsafe_print_err(fmt, args...) \ | |
| 27 | { \ | |
| 28 | /* Can't use dynamic allocation. Limit ourselves to 250 chars. */ \ | |
| 29 | char ____buf[250]; \ | |
| 30 | int ____saved_errno; \ | |
| 31 | \ | |
| 32 | /* Save the errno. */ \ | |
| 33 | ____saved_errno = errno; \ | |
| 34 | \ | |
| 35 | snprintf(____buf, sizeof(____buf), fmt, ## args); \ | |
| 36 | \ | |
| 37 | /* Add end of string in case of buffer overflow. */ \ | |
| 38 | ____buf[sizeof(____buf)-1] = 0; \ | |
| 39 | \ | |
| 40 | patient_write(STDERR_FILENO, ____buf, strlen(____buf)); \ | |
| 41 | /* Can't print errors because we are in the error printing code path. */ \ | |
| 42 | \ | |
| 43 | /* Restore errno, in order to be async-signal safe. */ \ | |
| 44 | errno = ____saved_errno; \ | |
| 45 | } | |
| 46 | ||
| 2028e7fd PMF |
47 | #define UST_STR_COMPONENT XSTR(UST_COMPONENT) |
| 48 | ||
| 38f015df | 49 | #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 | 50 | |
| 02549014 | 51 | #ifdef UST_DEBUG |
| dd80aafe | 52 | # define DBG(fmt, args...) ERRMSG(fmt, ## args) |
| 17674885 PMF |
53 | #else |
| 54 | # define DBG(fmt, args...) do {} while(0) | |
| 55 | #endif | |
| dd80aafe PMF |
56 | #define WARN(fmt, args...) ERRMSG("Warning: " fmt, ## args) |
| 57 | #define ERR(fmt, args...) ERRMSG("Error: " fmt, ## args) | |
| 58 | #define BUG(fmt, args...) ERRMSG("BUG: " fmt, ## args) | |
| d61bfa72 PMF |
59 | |
| 60 | #if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE) | |
| 61 | #define PERROR(call, args...)\ | |
| 62 | do { \ | |
| 63 | char buf[200] = "Error in strerror_r()"; \ | |
| 64 | strerror_r(errno, buf, sizeof(buf)); \ | |
| dd80aafe | 65 | ERRMSG("Error: " call ": %s", ## args, buf); \ |
| d61bfa72 PMF |
66 | } while(0); |
| 67 | #else | |
| 68 | #define PERROR(call, args...)\ | |
| 69 | do { \ | |
| 70 | char *buf; \ | |
| 71 | char tmp[200]; \ | |
| 72 | buf = strerror_r(errno, tmp, sizeof(tmp)); \ | |
| dd80aafe | 73 | ERRMSG("Error: " call ": %s", ## args, buf); \ |
| d61bfa72 PMF |
74 | } while(0); |
| 75 | #endif | |
| c9b64079 PMF |
76 | |
| 77 | #define BUG_ON(condition) do { if (unlikely(condition)) ERR("condition not respected (BUG)"); } while(0) | |
| 5f54827b | 78 | #define WARN_ON(condition) do { if (unlikely(condition)) WARN("condition not respected on line %s:%d", __FILE__, __LINE__); } while(0) |
| c9b64079 | 79 | |
| 59b161cd | 80 | #endif /* USTERR_H */ |