-/* Copyright (C) 2009 Pierre-Marc Fournier
+#ifndef _USTERR_H
+#define _USTERR_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; either
- * version 2.1 of the License, or (at your option) any later version.
+ * 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef USTERR_H
-#define USTERR_H
-
#include <string.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <stdarg.h>
#include <stdio.h>
-#include "share.h"
+#include <lttng/core.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
#define XSTR(d) STR(d)
#define STR(s) #s
-/* 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, ...);
-
-#define sigsafe_print_err(fmt, args...) \
-{ \
- /* Can't use dynamic allocation. Limit ourselves to 250 chars. */ \
- char ____buf[250]; \
- int ____saved_errno; \
-\
- /* Save the errno. */ \
- ____saved_errno = errno; \
-\
- ust_safe_snprintf(____buf, sizeof(____buf), fmt, ## args); \
-\
- /* Add end of string in case of buffer overflow. */ \
- ____buf[sizeof(____buf)-1] = 0; \
-\
- patient_write(STDERR_FILENO, ____buf, strlen(____buf)); \
- /* Can't print errors because we are in the error printing code path. */ \
-\
- /* Restore errno, in order to be async-signal safe. */ \
- errno = ____saved_errno; \
-}
-
#define UST_STR_COMPONENT XSTR(UST_COMPONENT)
-#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)
+#define ERRMSG(fmt, args...) \
+ do { \
+ fprintf(stderr, UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", \
+ (long) getpid(), \
+ (long) syscall(SYS_gettid), \
+ ## args, \
+ __func__); \
+ } while(0)
-#ifdef UST_DEBUG
-# define DBG(fmt, args...) ERRMSG(fmt, ## args)
-# define DBG_raw(fmt, args...) do { sigsafe_print_err(fmt, ## args); fflush(stderr); } while(0)
+#ifdef LTTNG_UST_DEBUG
+# define DBG(fmt, args...) ERRMSG(fmt, ## args)
+# define DBG_raw(fmt, args...) \
+ do { \
+ fprintf(stderr, fmt, ## args); \
+ } while(0)
#else
-# define DBG(fmt, args...) do {} while(0)
-# define DBG_raw(fmt, args...) do {} while(0)
+# define DBG(fmt, args...) \
+ do { \
+ if (ust_debug()) \
+ ERRMSG(fmt, ## args); \
+ } while (0)
+# define DBG_raw(fmt, args...) \
+ do { \
+ if (ust_debug()) { \
+ fprintf(stderr, fmt, ## args); \
+ } \
+ } 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)
} while(0);
#endif
-#define BUG_ON(condition) do { if (unlikely(condition)) ERR("condition not respected (BUG)"); } while(0)
-#define WARN_ON(condition) do { if (unlikely(condition)) WARN("condition not respected on line %s:%d", __FILE__, __LINE__); } while(0)
+#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_H */
+#endif /* _USTERR_H */