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1 | /* This file is part of the Linux Trace Toolkit viewer |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
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; |
7 | * |
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. |
12 | * |
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, |
16 | * MA 02111-1307, USA. |
17 | */ |
18 | |
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19 | #ifndef FILTER_H |
20 | #define FILTER_H |
21 | |
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22 | #include <lttv/traceset.h> |
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23 | #include <lttv/tracecontext.h> |
24 | #include <lttv/state.h> |
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25 | #include <lttv/module.h> |
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26 | #include <ltt/ltt.h> |
27 | #include <ltt/event.h> |
28 | |
29 | #define AVERAGE_EXPRESSION_LENGTH 6 |
30 | #define MAX_FACTOR 1.5 |
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31 | |
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32 | /* A filter expression consists in nested AND, OR and NOT expressions |
33 | involving boolean relation (>, >=, =, !=, <, <=) between event fields and |
34 | specific values. It is compiled into an efficient data structure which |
35 | is used in functions to check if a given event or tracefile satisfies the |
36 | filter. |
37 | |
38 | The grammar for filters is: |
39 | |
40 | filter = expression |
41 | |
42 | expression = "(" expression ")" | "!" expression | |
43 | expression "&&" expression | expression "||" expression | |
44 | simpleExpression |
45 | |
46 | simpleExpression = fieldPath op value |
47 | |
48 | fieldPath = fieldComponent [ "." fieldPath ] |
49 | |
50 | fieldComponent = name [ "[" integer "]" ] |
51 | |
52 | value = integer | double | string |
53 | |
54 | */ |
55 | |
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56 | extern GQuark |
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57 | LTTV_FILTER_TRACE, |
58 | LTTV_FILTER_TRACESET, |
59 | LTTV_FILTER_TRACEFILE, |
60 | LTTV_FILTER_STATE, |
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61 | LTTV_FILTER_EVENT, |
62 | LTTV_FILTER_NAME, |
63 | LTTV_FILTER_CATEGORY, |
64 | LTTV_FILTER_TIME, |
65 | LTTV_FILTER_TSC, |
66 | LTTV_FILTER_PID, |
67 | LTTV_FILTER_PPID, |
68 | LTTV_FILTER_C_TIME, |
69 | LTTV_FILTER_I_TIME, |
70 | LTTV_FILTER_P_NAME, |
71 | LTTV_FILTER_EX_MODE, |
72 | LTTV_FILTER_EX_SUBMODE, |
73 | LTTV_FILTER_P_STATUS, |
74 | LTTV_FILTER_CPU; |
75 | |
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76 | /** |
77 | * @enum lttv_expression_op |
78 | */ |
79 | typedef enum _lttv_expression_op |
80 | { |
81 | LTTV_FIELD_EQ, /** equal */ |
82 | LTTV_FIELD_NE, /** not equal */ |
83 | LTTV_FIELD_LT, /** lower than */ |
84 | LTTV_FIELD_LE, /** lower or equal */ |
85 | LTTV_FIELD_GT, /** greater than */ |
86 | LTTV_FIELD_GE /** greater or equal */ |
87 | } lttv_expression_op; |
88 | |
89 | typedef enum _lttv_expression_type |
90 | { |
91 | LTTV_EXPRESSION, |
92 | LTTV_SIMPLE_EXPRESSION |
93 | } lttv_expression_type; |
94 | |
95 | typedef struct _lttv_simple_expression |
96 | { |
97 | lttv_expression_op op; |
98 | char *field_name; |
99 | char *value; |
100 | } lttv_simple_expression; |
101 | |
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102 | typedef enum _lttv_logical_op { |
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103 | OR = 1, /* 1 */ |
104 | AND = 1<<1, /* 2 */ |
105 | NOT = 1<<2, /* 4 */ |
106 | XOR = 1<<3 /* 8 */ |
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107 | } lttv_logical_op; |
108 | |
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109 | /* |
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110 | * Ah .. that's my tree |
111 | */ |
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112 | typedef struct _lttv_expression |
113 | { |
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114 | // gboolean simple_expression; |
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115 | int op; |
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116 | lttv_expression_type type; |
117 | union { |
118 | struct lttv_expression *e; |
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119 | // lttv_field_relation *se; /* --> simple expression */ |
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120 | } e; |
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121 | } lttv_expression; |
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122 | |
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123 | |
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124 | //typedef union _lttv_expression { |
125 | // lttv_simple_expression se; |
126 | // |
127 | //} lttv_expression; |
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128 | |
129 | typedef struct _lttv_filter_tree { |
130 | lttv_expression* node; |
131 | struct lttv_filter_tree* r_child; |
132 | struct lttv_filter_tree* l_child; |
133 | } lttv_filter_tree; |
134 | |
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135 | /** |
136 | * @struct lttv_filter |
137 | * ( will later contain a binary tree of filtering options ) |
138 | */ |
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139 | typedef struct _lttv_filter_t { |
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140 | lttv_filter_tree* tree; |
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141 | } lttv_filter_t; |
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142 | |
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143 | /* Parse field path contained in list */ |
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144 | gboolean parse_field_path(GList* fp); |
145 | |
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146 | |
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147 | gboolean parse_simple_expression(GString* expression); |
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148 | |
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149 | /* Compile the filter expression into an efficient data structure */ |
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150 | lttv_filter_t *lttv_filter_new(char *expression, LttvTraceState *tfs); |
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151 | |
152 | |
153 | /* Check if the tracefile or event satisfies the filter. The arguments are |
154 | declared as void * to allow these functions to be used as hooks. */ |
155 | |
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156 | gboolean lttv_filter_tracefile(lttv_filter_t *filter, LttTracefile *tracefile); |
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157 | |
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158 | gboolean lttv_filter_tracestate(lttv_filter_t *filter, LttvTraceState *tracestate); |
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159 | |
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160 | gboolean lttv_filter_event(lttv_filter_t *filter, LttEvent *event); |
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161 | |
162 | #endif // FILTER_H |
163 | |