| 1 | #ifndef _UST_TRACEPOINT_INTERNAL_H |
| 2 | #define _UST_TRACEPOINT_INTERNAL_H |
| 3 | |
| 4 | /* |
| 5 | * tracepoint-internal.h |
| 6 | * |
| 7 | * Tracepoint internal header. |
| 8 | * |
| 9 | * Copyright (C) 2008 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> |
| 10 | * Copyright (C) 2009 Pierre-Marc Fournier |
| 11 | * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> |
| 12 | * |
| 13 | * This library is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU Lesser General Public |
| 15 | * License as published by the Free Software Foundation; |
| 16 | * version 2.1 of the License. |
| 17 | * |
| 18 | * This library is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | * Lesser General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU Lesser General Public |
| 24 | * License along with this library; if not, write to the Free Software |
| 25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 26 | * |
| 27 | * Heavily inspired from the Linux Kernel Markers. |
| 28 | * |
| 29 | * Ported to userspace by Pierre-Marc Fournier. |
| 30 | */ |
| 31 | |
| 32 | #include <urcu-bp.h> |
| 33 | #include <lttng/core.h> |
| 34 | #include <urcu/list.h> |
| 35 | #include <lttng/tracepoint.h> |
| 36 | |
| 37 | struct tracepoint_lib { |
| 38 | struct tracepoint * const *tracepoints_start; |
| 39 | int tracepoints_count; |
| 40 | struct cds_list_head list; |
| 41 | }; |
| 42 | |
| 43 | extern int tracepoint_probe_register_noupdate(const char *name, void *probe, |
| 44 | void *data); |
| 45 | extern int tracepoint_probe_unregister_noupdate(const char *name, void *probe, |
| 46 | void *data); |
| 47 | extern void tracepoint_probe_update_all(void); |
| 48 | |
| 49 | struct tracepoint_iter { |
| 50 | struct tracepoint_lib *lib; |
| 51 | struct tracepoint * const *tracepoint; |
| 52 | }; |
| 53 | |
| 54 | extern void tracepoint_iter_start(struct tracepoint_iter *iter); |
| 55 | extern void tracepoint_iter_next(struct tracepoint_iter *iter); |
| 56 | extern void tracepoint_iter_stop(struct tracepoint_iter *iter); |
| 57 | extern void tracepoint_iter_reset(struct tracepoint_iter *iter); |
| 58 | extern int tracepoint_get_iter_range(struct tracepoint * const **tracepoint, |
| 59 | struct tracepoint * const *begin, struct tracepoint * const *end); |
| 60 | |
| 61 | /* |
| 62 | * tracepoint_synchronize_unregister must be called between the last tracepoint |
| 63 | * probe unregistration and the end of module exit to make sure there is no |
| 64 | * caller executing a probe when it is freed. |
| 65 | */ |
| 66 | static inline void tracepoint_synchronize_unregister(void) |
| 67 | { |
| 68 | synchronize_rcu(); |
| 69 | } |
| 70 | |
| 71 | struct trace_event_iter { |
| 72 | struct trace_event_lib *lib; |
| 73 | struct trace_event * const *trace_event; |
| 74 | }; |
| 75 | |
| 76 | extern void trace_event_iter_start(struct trace_event_iter *iter); |
| 77 | extern void trace_event_iter_next(struct trace_event_iter *iter); |
| 78 | extern void trace_event_iter_stop(struct trace_event_iter *iter); |
| 79 | extern void trace_event_iter_reset(struct trace_event_iter *iter); |
| 80 | |
| 81 | extern void trace_event_update_process(void); |
| 82 | extern int is_trace_event_enabled(const char *channel, const char *name); |
| 83 | |
| 84 | extern void init_tracepoint(void); |
| 85 | extern void exit_tracepoint(void); |
| 86 | |
| 87 | #endif /* _UST_TRACEPOINT_INTERNAL_H */ |