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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, |
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92 | LTTV_SIMPLE_EXPRESSION, |
93 | LTTV_EXPRESSION_OP, |
94 | LTTV_UNDEFINED_EXPRESSION |
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95 | } lttv_expression_type; |
96 | |
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97 | typedef enum _lttv_tree_element { |
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98 | LTTV_TREE_IDLE, |
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99 | LTTV_TREE_NODE, |
100 | LTTV_TREE_LEAF |
101 | } lttv_tree_element; |
102 | |
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103 | typedef struct _lttv_simple_expression |
104 | { |
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105 | char *field_name; |
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106 | lttv_expression_op op; |
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107 | char *value; |
108 | } lttv_simple_expression; |
109 | |
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110 | typedef enum _lttv_logical_op { |
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111 | LTTV_LOGICAL_OR = 1, /* 1 */ |
112 | LTTV_LOGICAL_AND = 1<<1, /* 2 */ |
113 | LTTV_LOGICAL_NOT = 1<<2, /* 4 */ |
114 | LTTV_LOGICAL_XOR = 1<<3 /* 8 */ |
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115 | } lttv_logical_op; |
116 | |
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117 | /* |
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118 | * Ah .. that's my tree |
119 | */ |
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120 | //typedef struct _lttv_expression |
121 | //{ |
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122 | // gboolean simple_expression; |
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123 | // int op; |
124 | // lttv_expression_type type; |
125 | // union { |
126 | // struct lttv_expression *e; |
127 | // lttv_field_relation *se; /* --> simple expression */ |
128 | // } e; |
129 | //} lttv_expression; |
130 | |
131 | typedef struct _lttv_expression { |
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132 | lttv_expression_type type; |
133 | union { |
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134 | lttv_simple_expression *se; |
135 | int op; |
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136 | } e; |
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137 | } lttv_expression; |
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138 | |
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139 | typedef struct _lttv_filter_tree { |
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140 | // lttv_expression* node; |
141 | int node; |
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142 | lttv_tree_element left; |
143 | lttv_tree_element right; |
144 | union { |
145 | struct lttv_filter_tree* t; |
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146 | lttv_simple_expression* leaf; |
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147 | } l_child; |
148 | union { |
149 | struct lttv_filter_tree* t; |
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150 | lttv_simple_expression* leaf; |
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151 | } r_child; |
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152 | } lttv_filter_tree; |
153 | |
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154 | /** |
155 | * @struct lttv_filter |
156 | * ( will later contain a binary tree of filtering options ) |
157 | */ |
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158 | typedef struct _lttv_filter_t { |
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159 | lttv_filter_tree* tree; |
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160 | } lttv_filter_t; |
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161 | |
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162 | |
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163 | lttv_simple_expression* lttv_simple_expression_new(); |
164 | |
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165 | lttv_filter_tree* lttv_filter_tree_new(); |
166 | |
167 | void lttv_filter_tree_destroy(lttv_filter_tree* tree); |
168 | |
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169 | lttv_filter* lttv_filter_clone(lttv_filter* tree); |
170 | |
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171 | void lttv_filter_tree_add_node(GPtrArray* stack, lttv_filter_tree* subtree, lttv_logical_op op); |
172 | |
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173 | /* Parse field path contained in list */ |
174 | gboolean parse_field_path(GPtrArray* fp); |
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175 | |
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176 | gboolean parse_simple_expression(GString* expression); |
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177 | |
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178 | /* Compile the filter expression into an efficient data structure */ |
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179 | lttv_filter_tree *lttv_filter_new(char *expression, LttvTraceState *tfs); |
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180 | |
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181 | void lttv_filter_destroy(lttv_filter* filter); |
182 | |
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183 | /* Check if the tracefile or event satisfies the filter. The arguments are |
184 | declared as void * to allow these functions to be used as hooks. */ |
185 | |
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186 | gboolean lttv_filter_tracefile(lttv_filter_tree *filter, LttTracefile *tracefile); |
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187 | |
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188 | gboolean lttv_filter_tracestate(lttv_filter_t *filter, LttvTraceState *tracestate); |
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189 | |
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190 | gboolean lttv_filter_event(lttv_filter_t *filter, LttEvent *event); |
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191 | |
192 | #endif // FILTER_H |
193 | |