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1 | /* This file is part of the Linux Trace Toolkit trace reading library |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License Version 2.1 as published by the Free Software Foundation. |
7 | * |
8 | * This library 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 GNU |
11 | * Lesser General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
16 | * Boston, MA 02111-1307, USA. |
17 | */ |
18 | |
19 | #ifndef TRACE_H |
20 | #define TRACE_H |
21 | |
22 | #include <ltt/ltt.h> |
23 | |
24 | |
25 | extern GQuark LTT_FACILITY_NAME_HEARTBEAT, |
26 | LTT_EVENT_NAME_HEARTBEAT; |
27 | |
28 | /* A trace is specified as a pathname to the directory containing all the |
29 | associated data (control tracefiles, per cpu tracefiles, event |
30 | descriptions...). |
31 | |
32 | When a trace is closed, all the associated facilities, types and fields |
33 | are released as well. |
34 | |
35 | return value is NULL if there is an error when opening the trace. |
36 | |
37 | */ |
38 | |
39 | LttTrace *ltt_trace_open(const gchar *pathname); |
40 | |
41 | /* copy reopens a trace |
42 | * |
43 | * return value NULL if error while opening the trace |
44 | */ |
45 | LttTrace *ltt_trace_copy(LttTrace *self); |
46 | |
47 | gchar * ltt_trace_name(LttTrace *t); |
48 | |
49 | void ltt_trace_close(LttTrace *t); |
50 | |
51 | |
52 | LttSystemDescription *ltt_trace_system_description(LttTrace *t); |
53 | |
54 | |
55 | /* Functions to discover the facilities in the trace. Once the number |
56 | of facilities is known, they may be accessed by position. Multiple |
57 | versions of a facility (same name, different checksum) have consecutive |
58 | positions. */ |
59 | |
60 | unsigned ltt_trace_facility_number(LttTrace *t); |
61 | |
62 | LttFacility *ltt_trace_facility_get(LttTrace *t, unsigned i); |
63 | |
64 | LttFacility * ltt_trace_facility_by_id(LttTrace * trace, unsigned id); |
65 | |
66 | /* Look for a facility by name. It returns the number of facilities found |
67 | and sets the position argument to the first found. Returning 0, the named |
68 | facility is unknown, returning 1, the named facility is at the specified |
69 | position, returning n, the facilities are from position to |
70 | position + n - 1. */ |
71 | |
72 | unsigned ltt_trace_facility_find(LttTrace *t, gchar *name, unsigned *position); |
73 | |
74 | |
75 | /* Functions to discover all the event types in the trace */ |
76 | |
77 | unsigned ltt_trace_eventtype_number(LttTrace *t); |
78 | |
79 | LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned i); |
80 | |
81 | |
82 | /* There is one "per cpu" tracefile for each CPU, numbered from 0 to |
83 | the maximum number of CPU in the system. When the number of CPU installed |
84 | is less than the maximum, some positions are unused. There are also a |
85 | number of "control" tracefiles (facilities, interrupts...). */ |
86 | |
87 | unsigned ltt_trace_control_tracefile_number(LttTrace *t); |
88 | |
89 | unsigned ltt_trace_per_cpu_tracefile_number(LttTrace *t); |
90 | |
91 | |
92 | /* It is possible to search for the tracefiles by name or by CPU tracefile |
93 | * name. |
94 | * The index within the tracefiles of the same type is returned if found |
95 | * and a negative value otherwise. |
96 | */ |
97 | |
98 | int ltt_trace_control_tracefile_find(LttTrace *t, const gchar *name); |
99 | |
100 | int ltt_trace_per_cpu_tracefile_find(LttTrace *t, const gchar *name); |
101 | |
102 | |
103 | /* Get a specific tracefile */ |
104 | |
105 | LttTracefile *ltt_trace_control_tracefile_get(LttTrace *t, unsigned i); |
106 | |
107 | LttTracefile *ltt_trace_per_cpu_tracefile_get(LttTrace *t, unsigned i); |
108 | |
109 | |
110 | /* Get the start time and end time of the trace */ |
111 | |
112 | void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end); |
113 | |
114 | |
115 | /* Get the name of a tracefile */ |
116 | |
117 | char *ltt_tracefile_name(LttTracefile *tf); |
118 | |
119 | |
120 | /* Get the number of blocks in the tracefile */ |
121 | |
122 | unsigned ltt_tracefile_block_number(LttTracefile *tf); |
123 | |
124 | |
125 | /* Seek to the first event of the trace with time larger or equal to time */ |
126 | |
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127 | int ltt_tracefile_seek_time(LttTracefile *t, LttTime time); |
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128 | |
129 | /* Seek to the first event with position equal or larger to ep */ |
130 | |
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131 | int ltt_tracefile_seek_position(LttTracefile *t, |
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132 | const LttEventPosition *ep); |
133 | |
134 | /* Read the next event */ |
135 | |
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136 | int ltt_tracefile_read(LttTracefile *t); |
137 | |
138 | /* ltt_tracefile_read cut down in pieces */ |
139 | int ltt_tracefile_read_seek(LttTracefile *t); |
140 | int ltt_tracefile_read_update_event(LttTracefile *t); |
141 | int ltt_tracefile_read_op(LttTracefile *t); |
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142 | |
143 | /* open tracefile */ |
144 | |
145 | LttTracefile * ltt_tracefile_open(LttTrace *t, gchar * tracefile_name); |
146 | |
147 | void ltt_tracefile_open_cpu(LttTrace *t, gchar * tracefile_name); |
148 | |
149 | gint ltt_tracefile_open_control(LttTrace *t, gchar * control_name); |
150 | |
151 | |
152 | /* get the data type size and endian type of the local machine */ |
153 | |
154 | void getDataEndianType(LttArchSize * size, LttArchEndian * endian); |
155 | |
156 | /* get an integer number */ |
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157 | gint64 get_int(gboolean reverse_byte_order, gint size, void *data); |
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158 | |
159 | /* get the node name of the system */ |
160 | |
161 | gchar * ltt_trace_system_description_node_name (LttSystemDescription * s); |
162 | |
163 | |
164 | /* get the domain name of the system */ |
165 | |
166 | gchar * ltt_trace_system_description_domain_name (LttSystemDescription * s); |
167 | |
168 | |
169 | /* get the description of the system */ |
170 | |
171 | gchar * ltt_trace_system_description_description (LttSystemDescription * s); |
172 | |
173 | |
174 | /* get the start time of the trace */ |
175 | |
176 | LttTime ltt_trace_system_description_trace_start_time(LttSystemDescription *s); |
177 | |
178 | /* copy tracefile info over another. Used for sync. */ |
179 | LttTracefile *ltt_tracefile_new(); |
180 | void ltt_tracefile_destroy(LttTracefile *tf); |
181 | void ltt_tracefile_copy(LttTracefile *dest, const LttTracefile *src); |
182 | |
183 | void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname); |
184 | |
185 | |
186 | |
187 | #endif // TRACE_H |