+++ /dev/null
-#ifndef _USTERR_SIGNAL_SAFE_H
-#define _USTERR_SIGNAL_SAFE_H
-
-/*
- * Copyright (C) 2009 Pierre-Marc Fournier
- * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1 of
- * the License.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <string.h>
-#include <sys/types.h>
-#include <sys/syscall.h>
-#include <errno.h>
-#include <stdarg.h>
-#include <stdio.h>
-
-#include <lttng/share.h>
-
-enum ust_loglevel {
- UST_LOGLEVEL_UNKNOWN = 0,
- UST_LOGLEVEL_NORMAL,
- UST_LOGLEVEL_DEBUG,
-};
-
-extern volatile enum ust_loglevel ust_loglevel;
-void init_usterr(void);
-
-static inline int ust_debug(void)
-{
- return ust_loglevel == UST_LOGLEVEL_DEBUG;
-}
-
-#ifndef UST_COMPONENT
-//#error UST_COMPONENT is undefined
-#define UST_COMPONENT libust
-#endif
-
-/* To stringify the expansion of a define */
-#define UST_XSTR(d) UST_STR(d)
-#define UST_STR(s) #s
-
-#define USTERR_MAX_LEN 512
-
-/* We sometimes print in the tracing path, and tracing can occur in
- * signal handlers, so we must use a print method which is signal safe.
- */
-
-extern int ust_safe_snprintf(char *str, size_t n, const char *fmt, ...)
- __attribute__ ((format (printf, 3, 4)));
-
-static inline void __attribute__ ((format (printf, 1, 2)))
- __check_ust_safe_fmt(const char *fmt, ...)
-{
-}
-
-/* Can't use dynamic allocation. Limit ourselves to USTERR_MAX_LEN chars. */
-/* Add end of string in case of buffer overflow. */
-#define sigsafe_print_err(fmt, args...) \
-do { \
- char ____buf[USTERR_MAX_LEN]; \
- int ____saved_errno; \
- ____saved_errno = errno; /* signal-safety */ \
- ust_safe_snprintf(____buf, sizeof(____buf), fmt, ## args); \
- ____buf[sizeof(____buf) - 1] = 0; \
- patient_write(STDERR_FILENO, ____buf, strlen(____buf)); \
- errno = ____saved_errno; /* signal-safety */ \
-} while (0)
-
-#define UST_STR_COMPONENT UST_XSTR(UST_COMPONENT)
-
-#define ERRMSG(fmt, args...) \
- do { \
- sigsafe_print_err(UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" UST_XSTR(__LINE__) ")\n", \
- (long) getpid(), \
- (long) syscall(SYS_gettid), \
- ## args, __func__); \
- fflush(stderr); \
- } while(0)
-
-#ifdef LTTNG_UST_DEBUG
-# define DBG(fmt, args...) ERRMSG(fmt, ## args)
-# define DBG_raw(fmt, args...) \
- do { \
- sigsafe_print_err(fmt, ## args); \
- fflush(stderr); \
- } while(0)
-#else
-# define DBG(fmt, args...) \
- do { \
- if (ust_debug()) \
- ERRMSG(fmt, ## args); \
- } while (0)
-# define DBG_raw(fmt, args...) \
- do { \
- if (ust_debug()) { \
- sigsafe_print_err(fmt, ## args); \
- fflush(stderr); \
- } \
- } while(0)
-#endif
-#define WARN(fmt, args...) ERRMSG("Warning: " fmt, ## args)
-#define ERR(fmt, args...) ERRMSG("Error: " fmt, ## args)
-#define BUG(fmt, args...) ERRMSG("BUG: " fmt, ## args)
-
-#if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE)
-#define PERROR(call, args...)\
- do { \
- char buf[200] = "Error in strerror_r()"; \
- strerror_r(errno, buf, sizeof(buf)); \
- ERRMSG("Error: " call ": %s", ## args, buf); \
- } while(0);
-#else
-#define PERROR(call, args...)\
- do { \
- char *buf; \
- char tmp[200]; \
- buf = strerror_r(errno, tmp, sizeof(tmp)); \
- ERRMSG("Error: " call ": %s", ## args, buf); \
- } while(0);
-#endif
-
-#define BUG_ON(condition) \
- do { \
- if (caa_unlikely(condition)) \
- ERR("condition not respected (BUG) on line %s:%d", __FILE__, __LINE__); \
- } while(0)
-#define WARN_ON(condition) \
- do { \
- if (caa_unlikely(condition)) \
- WARN("condition not respected on line %s:%d", __FILE__, __LINE__); \
- } while(0)
-#define WARN_ON_ONCE(condition) WARN_ON(condition)
-
-#endif /* _USTERR_SIGNAL_SAFE_H */
projects / lttng-ust.git / blobdiff