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/*
* include/proto/trace.h
* This file provides functions for runtime tracing
*
* Copyright (C) 2000-2019 Willy Tarreau - w@1wt.eu
*
* 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
* exclusively.
*
* 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
*/
#ifndef _PROTO_TRACE_H
#define _PROTO_TRACE_H
#include <haproxy/api.h>
#include <haproxy/tools.h>
#include <import/ist.h>
#include <haproxy/list.h>
#include <types/log.h>
#include <haproxy/sink-t.h>
#include <types/trace.h>
/* Make a string from the location of the trace producer as "file:line" */
#define TRC_LOC _TRC_LOC(__FILE__, __LINE__)
#define _TRC_LOC(f,l) __TRC_LOC(f, ":", l)
#define __TRC_LOC(f,c,l) f c #l
/* truncate a macro arg list to exactly 5 args and replace missing ones with NULL */
#define TRC_5ARGS(a1,a2,a3,a4,a5,...) DEFNULL(a1),DEFNULL(a2),DEFNULL(a3),DEFNULL(a4),DEFNULL(a5)
/* For convenience, TRACE() alone uses the file's default TRACE_LEVEL, most
* likely TRACE_LEVEL_DEVELOPER, though the other explicit variants specify
* the desired level and will work when TRACE_LEVEL is not set. The 5 optional
* arguments are the 4 source-specific arguments that are passed to the cb()
* callback dedicated to decoding, and which may be used for special tracking.
* These 4 arguments as well as the cb() function pointer may all be NULL, or
* simply omitted (in which case they will be replaced by a NULL). This
* ordering allows many TRACE() calls to be placed using copy-paste and just
* change the message at the beginning. Only TRACE_DEVEL(), TRACE_ENTER() and
* TRACE_LEAVE() will report the calling function's name.
*/
#define TRACE(msg, mask, ...) \
trace(TRACE_LEVEL, (mask), TRACE_SOURCE, ist(TRC_LOC), NULL, TRC_5ARGS(__VA_ARGS__,,,,,), ist(msg))
#define TRACE_USER(msg, mask, ...) \
trace(TRACE_LEVEL_USER, (mask), TRACE_SOURCE, ist(TRC_LOC), NULL, TRC_5ARGS(__VA_ARGS__,,,,,), ist(msg))
#define TRACE_DATA(msg, mask, ...) \
trace(TRACE_LEVEL_DATA, (mask), TRACE_SOURCE, ist(TRC_LOC), NULL, TRC_5ARGS(__VA_ARGS__,,,,,), ist(msg))
#define TRACE_PROTO(msg, mask, ...) \
trace(TRACE_LEVEL_PROTO, (mask), TRACE_SOURCE, ist(TRC_LOC), NULL, TRC_5ARGS(__VA_ARGS__,,,,,), ist(msg))
#define TRACE_STATE(msg, mask, ...) \
trace(TRACE_LEVEL_STATE, (mask), TRACE_SOURCE, ist(TRC_LOC), NULL, TRC_5ARGS(__VA_ARGS__,,,,,), ist(msg))
#define TRACE_DEVEL(msg, mask, ...) \
trace(TRACE_LEVEL_DEVELOPER, (mask), TRACE_SOURCE, ist(TRC_LOC), __FUNCTION__, TRC_5ARGS(__VA_ARGS__,,,,,), ist(msg))
#define TRACE_ENTER(mask, ...) \
trace(TRACE_LEVEL_DEVELOPER, (mask), TRACE_SOURCE, ist(TRC_LOC), __FUNCTION__, TRC_5ARGS(__VA_ARGS__,,,,,), ist("entering"))
#define TRACE_LEAVE(mask, ...) \
trace(TRACE_LEVEL_DEVELOPER, (mask), TRACE_SOURCE, ist(TRC_LOC), __FUNCTION__, TRC_5ARGS(__VA_ARGS__,,,,,), ist("leaving"))
#define TRACE_POINT(mask, ...) \
trace(TRACE_LEVEL_DEVELOPER, (mask), TRACE_SOURCE, ist(TRC_LOC), __FUNCTION__, TRC_5ARGS(__VA_ARGS__,,,,,), ist("in"))
#if defined(DEBUG_DEV) || defined(DEBUG_FULL)
# define DBG_TRACE(msg, mask, ...) TRACE(msg, mask, __VA_ARGS__)
# define DBG_TRACE_USER(msg, mask, ...) TRACE_USER(msg, mask, __VA_ARGS__)
# define DBG_TRACE_DATA(msg, mask, ...) TRACE_DATA(msg, mask, __VA_ARGS__)
# define DBG_TRACE_PROTO(msg, mask, ...) TRACE_PROTO(msg, mask, __VA_ARGS__)
# define DBG_TRACE_STATE(msg, mask, ...) TRACE_STATE(msg, mask, __VA_ARGS__)
# define DBG_TRACE_DEVEL(msg, mask, ...) TRACE_DEVEL(msg, mask, __VA_ARGS__)
# define DBG_TRACE_ENTER(mask, ...) TRACE_ENTER(mask, __VA_ARGS__)
# define DBG_TRACE_LEAVE(mask, ...) TRACE_LEAVE(mask, __VA_ARGS__)
# define DBG_TRACE_POINT(mask, ...) TRACE_POINT(mask, __VA_ARGS__)
#else
# define DBG_TRACE(msg, mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_USER(msg, mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_DATA(msg, mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_PROTO(msg, mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_STATE(msg, mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_DEVEL(msg, mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_ENTER(mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_LEAVE(mask, ...) do { /* do nothing */ } while(0)
# define DBG_TRACE_POINT(mask, ...) do { /* do nothing */ } while(0)
#endif
extern struct list trace_sources;
extern THREAD_LOCAL struct buffer trace_buf;
void __trace(enum trace_level level, uint64_t mask, struct trace_source *src,
const struct ist where, const char *func,
const void *a1, const void *a2, const void *a3, const void *a4,
void (*cb)(enum trace_level level, uint64_t mask, const struct trace_source *src,
const struct ist where, const struct ist func,
const void *a1, const void *a2, const void *a3, const void *a4),
const struct ist msg);
/* return a single char to describe a trace state */
static inline char trace_state_char(enum trace_state st)
{
return (st == TRACE_STATE_RUNNING) ? 'R' :
(st == TRACE_STATE_WAITING) ? 'w' :
'.';
}
/* return a single char to describe an event state */
static inline char trace_event_char(uint64_t conf, uint64_t ev)
{
return (conf & ev) ? '+' : '-';
}
/* registers trace source <source>. Modifies the list element!
* The {start,pause,stop,report} events are not changed so the source may
* preset them.
*/
static inline void trace_register_source(struct trace_source *source)
{
source->lockon = TRACE_LOCKON_NOTHING;
source->level = TRACE_LEVEL_USER;
source->verbosity = 1;
source->sink = NULL;
source->state = TRACE_STATE_STOPPED;
source->lockon_ptr = NULL;
LIST_ADDQ(&trace_sources, &source->source_link);
}
/* sends a trace for the given source */
static inline void trace(enum trace_level level, uint64_t mask, struct trace_source *src,
const struct ist where, const char *func,
const void *a1, const void *a2, const void *a3, const void *a4,
void (*cb)(enum trace_level level, uint64_t mask, const struct trace_source *src,
const struct ist where, const struct ist func,
const void *a1, const void *a2, const void *a3, const void *a4),
const struct ist msg)
{
if (unlikely(src->state != TRACE_STATE_STOPPED))
__trace(level, mask, src, where, func, a1, a2, a3, a4, cb, msg);
}
#endif /* _PROTO_TRACE_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/