1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Michel Dagenais
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19 #ifndef PROCESSTRACE_H
20 #define PROCESSTRACE_H
23 #include <lttv/traceset.h>
24 #include <lttv/attribute.h>
25 #include <lttv/hook.h>
27 #include <ltt/marker.h>
29 /* This is the generic part of trace processing. All events within a
30 certain time interval are accessed and processing hooks are called for
31 each. The events are examined in monotonically increasing time to more
32 closely follow the traced system behavior.
34 Hooks are called at several different places during the processing:
35 before traceset, after traceset, check trace, before trace, after trace,
36 check tracefile, before tracefile, after tracefile,
37 check_event, before_event, before_event_by_id,
38 after_event, after_event_by_id.
40 In each case the "check" hooks are called first to determine if further
41 processing of the trace, tracefile or event is wanted. Then, the before
42 hooks and the after hooks are called. The before hooks for a traceset
43 are called before those for the contained traces, which are called before
44 those for the contained tracefiles. The after hooks are called in reverse
45 order. The event hooks are called after all the before_tracefile hooks
46 and before all the after_tracefile hooks.
48 The hooks receive two arguments, the hook_data and call_data. The hook_data
49 is specified when the hook is registered and typically links to the
50 object registering the hook (e.g. a graphical events viewer). The call_data
51 must contain all the context related to the call. The traceset hooks receive
52 the LttvTracesetContext provided by the caller. The trace hooks receive
53 the LttvTraceContext from the traces array in the LttvTracesetContext.
54 The tracefile and event hooks receive the LttvTracefileContext from
55 the tracefiles array in the LttvTraceContext. The LttEvent and LttTime
56 fields in the tracefile context are set to the current event and current
57 event time before calling the event hooks. No other context field is
60 The contexts in the traces and tracefiles arrays must be allocated by
61 the caller, either before the call or during the before hooks of the
62 enclosing traceset or trace. The order in the traces array must
63 correspond to the lttv_traceset_get function. The order in the tracefiles
64 arrays must correspond to the ltt_trace_control_tracefile_get and
65 ltt_trace_per_cpu_tracefile_get functions. The traceset, trace and
66 tracefile contexts may be subtyped as needed. Indeed, both the contexts
67 and the hooks are defined by the caller. */
70 typedef struct _LttvTracesetContext LttvTracesetContext
;
71 typedef struct _LttvTracesetContextClass LttvTracesetContextClass
;
73 typedef struct _LttvTraceContext LttvTraceContext
;
74 typedef struct _LttvTraceContextClass LttvTraceContextClass
;
76 typedef struct _LttvTracefileContext LttvTracefileContext
;
77 typedef struct _LttvTracefileContextClass LttvTracefileContextClass
;
79 typedef struct _LttvTracesetContextPosition LttvTracesetContextPosition
;
80 typedef struct _LttvTraceContextPosition LttvTraceContextPosition
;
82 #ifndef LTTVFILTER_TYPE_DEFINED
83 typedef struct _LttvFilter LttvFilter
;
84 #define LTTVFILTER_TYPE_DEFINED
87 #define LTTV_TRACESET_CONTEXT_TYPE (lttv_traceset_context_get_type ())
88 #define LTTV_TRACESET_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_CONTEXT_TYPE, LttvTracesetContext))
89 #define LTTV_TRACESET_CONTEXT_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_CONTEXT_TYPE, LttvTracesetContextClass))
90 #define LTTV_IS_TRACESET_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_CONTEXT_TYPE))
91 #define LTTV_IS_TRACESET_CONTEXT_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_CONTEXT_TYPE))
92 #define LTTV_TRACESET_CONTEXT_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_CONTEXT_TYPE, LttvTracesetContextClass))
94 struct _LttvTracesetContext
{
98 LttvTraceContext
**traces
;
101 TimeInterval time_span
;
104 LttvTracesetContextPosition
*sync_position
; /* position at which to sync the
108 struct _LttvTracesetContextClass
{
111 void (*init
) (LttvTracesetContext
*self
, LttvTraceset
*ts
);
112 void (*fini
) (LttvTracesetContext
*self
);
113 LttvTracesetContext
* (*new_traceset_context
) (LttvTracesetContext
*self
);
114 LttvTraceContext
* (*new_trace_context
) (LttvTracesetContext
*self
);
115 LttvTracefileContext
* (*new_tracefile_context
) (LttvTracesetContext
*self
);
118 GType
lttv_traceset_context_get_type (void);
120 void lttv_context_init(LttvTracesetContext
*self
, LttvTraceset
*ts
);
122 void lttv_context_fini(LttvTracesetContext
*self
);
124 LttvTracesetContext
*
125 lttv_context_new_traceset_context(LttvTracesetContext
*self
);
128 lttv_context_new_trace_context(LttvTracesetContext
*self
);
130 LttvTracefileContext
*
131 lttv_context_new_tracefile_context(LttvTracesetContext
*self
);
134 #define LTTV_TRACE_CONTEXT_TYPE (lttv_trace_context_get_type ())
135 #define LTTV_TRACE_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_CONTEXT_TYPE, LttvTraceContext))
136 #define LTTV_TRACE_CONTEXT_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_CONTEXT_TYPE, LttvTraceContextClass))
137 #define LTTV_IS_TRACE_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_CONTEXT_TYPE))
138 #define LTTV_IS_TRACE_CONTEXT_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_CONTEXT_TYPE))
139 #define LTTV_TRACE_CONTEXT_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_CONTEXT_TYPE, LttvTraceContextClass))
141 struct _LttvTraceContext
{
144 LttvTracesetContext
*ts_context
;
145 guint index
; /* in ts_context->traces */
148 //LttvTracefileContext **tracefiles;
152 TimeInterval time_span
;
155 struct _LttvTraceContextClass
{
159 GType
lttv_trace_context_get_type (void);
161 #define LTTV_TRACEFILE_CONTEXT_TYPE (lttv_tracefile_context_get_type ())
162 #define LTTV_TRACEFILE_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_CONTEXT_TYPE, LttvTracefileContext))
163 #define LTTV_TRACEFILE_CONTEXT_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_CONTEXT_TYPE, LttvTracefileContextClass))
164 #define LTTV_IS_TRACEFILE_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_CONTEXT_TYPE))
165 #define LTTV_IS_TRACEFILE_CONTEXT_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_CONTEXT_TYPE))
166 #define LTTV_TRACEFILE_CONTEXT_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_CONTEXT_TYPE, LttvTracefileContextClass))
168 struct _LttvTracefileContext
{
171 LttvTraceContext
*t_context
;
173 guint index
; /* in ts_context->tracefiles */
177 LttvHooksById
*event_by_id
;
180 gint target_pid
; /* Target PID of the event.
181 Updated by state.c. -1 means unset. */
184 struct _LttvTracefileContextClass
{
188 GType
lttv_tracefile_context_get_type (void);
190 /* Run through the events in a traceset in sorted order calling all the
191 hooks appropriately. It starts at the current time and runs until end or
192 nb_events are processed. */
194 void lttv_process_traceset(LttvTracesetContext
*self
, LttTime end
,
197 /* Process traceset can also be done in smaller pieces calling begin,
198 * then seek and middle repeatedly, and end. The middle function return the
199 * number of events processed. It will be smaller than nb_events if the end time
200 * or end position is reached. */
203 void lttv_process_traceset_begin(LttvTracesetContext
*self
,
204 LttvHooks
*before_traceset
,
205 LttvHooks
*before_trace
,
206 LttvHooks
*before_tracefile
,
208 LttvHooksByIdChannelArray
*event_by_id_channel
);
211 guint
lttv_process_traceset_middle(LttvTracesetContext
*self
,
214 const LttvTracesetContextPosition
*end_position
);
216 void lttv_process_traceset_end(LttvTracesetContext
*self
,
217 LttvHooks
*after_traceset
,
218 LttvHooks
*after_trace
,
219 LttvHooks
*after_tracefile
,
221 LttvHooksByIdChannelArray
*event_by_id_channel
);
224 void lttv_process_traceset_seek_time(LttvTracesetContext
*self
, LttTime start
);
226 void lttv_traceset_context_compute_time_span(LttvTracesetContext
*self
,
227 TimeInterval
*time_span
);
229 gboolean
lttv_process_traceset_seek_position(LttvTracesetContext
*self
,
230 const LttvTracesetContextPosition
*pos
);
232 void lttv_process_trace_seek_time(LttvTraceContext
*self
, LttTime start
);
234 void lttv_traceset_context_add_hooks(LttvTracesetContext
*self
,
235 LttvHooks
*before_traceset
,
236 LttvHooks
*before_trace
,
237 LttvHooks
*before_tracefile
,
239 LttvHooksByIdChannelArray
*event_by_id_channel
);
241 void lttv_traceset_context_remove_hooks(LttvTracesetContext
*self
,
242 LttvHooks
*after_traceset
,
243 LttvHooks
*after_trace
,
244 LttvHooks
*after_tracefile
,
246 LttvHooksByIdChannelArray
*event_by_id_channel
);
248 void lttv_trace_context_add_hooks(LttvTraceContext
*self
,
249 LttvHooks
*before_trace
,
250 LttvHooks
*before_tracefile
,
252 LttvHooksByIdChannelArray
*event_by_id_channel
);
254 void lttv_trace_context_remove_hooks(LttvTraceContext
*self
,
255 LttvHooks
*after_trace
,
256 LttvHooks
*after_tracefile
,
258 LttvHooksByIdChannelArray
*event_by_id_channel
);
260 void lttv_tracefile_context_add_hooks(LttvTracefileContext
*self
,
261 LttvHooks
*before_tracefile
,
263 LttvHooksById
*event_by_id
);
266 void lttv_tracefile_context_remove_hooks(LttvTracefileContext
*self
,
267 LttvHooks
*after_tracefile
,
269 LttvHooksById
*event_by_id
);
271 typedef struct _LttvTraceHook
{
273 struct marker_data
*mdata
;
275 guint16 id
; /* id of the marker associated with this hook */
276 GPtrArray
*fields
; /* struct marker_fields pointers */
280 /* Get the head of marker list corresponding to the given trace hook.
282 struct marker_info
*lttv_trace_hook_get_marker(LttTrace
*t
, LttvTraceHook
*th
);
284 /* Remove the hooks from the array. Does not free the array itself. */
285 void lttv_trace_hook_remove_all(GArray
**th
);
287 /* Search in the trace for the id of the named event type within the named
288 facility. Then, find the three (if non null) named fields. All that
289 information is then used to fill the LttvTraceHook structure. This
290 is useful to find the specific id for an event within a trace, for
291 registering a hook using this structure as event data;
292 it already contains the (up to three) needed fields handles.
293 Returns the modified LttvTraceHook array.
294 Prints warnings if events or markers are not found. returns 1 on error,
296 Adds the hooks to the trace_hooks array.
299 int lttv_trace_find_hook(LttTrace
*t
, GQuark facility_name
, GQuark event_name
,
300 GQuark fields
[], LttvHook h
, gpointer hook_data
, GArray
**trace_hooks
);
302 static inline struct marker_field
*
303 lttv_trace_get_hook_field(LttvTraceHook
*hook
, unsigned int index
)
305 return g_ptr_array_index(hook
->fields
, index
);
309 static inline GQuark
lttv_merge_facility_event_name(GQuark fac
, GQuark ev
)
312 const char *sfac
, *sev
;
315 sfac
= g_quark_to_string(fac
);
316 sev
= g_quark_to_string(ev
);
317 tmp
= g_new(char, strlen(sfac
) + strlen(sev
) + 3); /* 3: _ \0 \0 */
321 ret
= g_quark_from_string(tmp
);
327 LttvTracefileContext
*lttv_traceset_context_get_current_tfc(
328 LttvTracesetContext
*self
);
331 LttvTracesetContextPosition
*lttv_traceset_context_position_new(
332 const LttvTracesetContext
*self
);
334 void lttv_traceset_context_position_save(const LttvTracesetContext
*self
,
335 LttvTracesetContextPosition
*pos
);
337 void lttv_traceset_context_position_destroy(LttvTracesetContextPosition
*pos
);
339 void lttv_traceset_context_position_copy(LttvTracesetContextPosition
*dest
,
340 const LttvTracesetContextPosition
*src
);
342 gint
lttv_traceset_context_pos_pos_compare(
343 const LttvTracesetContextPosition
*pos1
,
344 const LttvTracesetContextPosition
*pos2
);
346 gint
lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext
*self
,
347 const LttvTracesetContextPosition
*pos2
);
349 LttTime
lttv_traceset_context_position_get_time(
350 const LttvTracesetContextPosition
*pos
);
352 gint
compare_tracefile(gconstpointer a
, gconstpointer b
);
355 /* Synchronisation helpers : save/restore synchronization between ltt traces and
356 * a traceset context. */
357 void lttv_process_traceset_synchronize_tracefiles(LttvTracesetContext
*tsc
);
359 void lttv_process_traceset_get_sync_data(LttvTracesetContext
*tsc
);
361 /* Seek n events forward and backward (without filtering) : only use these where
362 * necessary : the seek backward is costy. */
364 #define BACKWARD_SEEK_MUL 2 /* Multiplication factor of time_offset between
365 backward seek iterations */
367 static const LttTime seek_back_default_offset
= { 1, 0 };
369 typedef gboolean
check_handler(guint count
, gboolean
*stop_flag
, gpointer data
);
371 guint
lttv_process_traceset_seek_n_forward(LttvTracesetContext
*self
,
373 check_handler
*check
,
379 typedef void (*seek_time_fct
)(LttvTracesetContext
*self
, LttTime start
);
381 /* If first_offset is ltt_time_zero, it will choose a default value */
382 guint
lttv_process_traceset_seek_n_backward(LttvTracesetContext
*self
,
384 LttTime first_offset
,
386 check_handler
*check
,
393 #define FIELD_ARRAY(val...) ((GQuark[]){ val, 0 })
395 #endif // PROCESSTRACE_H