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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 | /* |
20 | * The text filter facility will prompt for user filter option |
21 | * and transmit them to the lttv core |
22 | */ |
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23 | |
24 | #include <lttv/lttv.h> |
25 | #include <lttv/option.h> |
26 | #include <lttv/module.h> |
27 | #include <lttv/hook.h> |
28 | #include <lttv/attribute.h> |
29 | #include <lttv/iattribute.h> |
30 | #include <lttv/stats.h> |
31 | #include <lttv/filter.h> |
32 | #include <ltt/ltt.h> |
33 | #include <ltt/event.h> |
34 | #include <ltt/type.h> |
35 | #include <ltt/trace.h> |
36 | #include <ltt/facility.h> |
37 | #include <stdio.h> |
38 | |
39 | /* Insert the hooks before and after each trace and tracefile, and for each |
40 | event. Print a global header. */ |
41 | |
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42 | /* |
43 | * YET TO BE ANSWERED ! |
44 | * - why does this module need dependency with batchAnalysis ? |
45 | */ |
46 | |
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47 | /* |
48 | * TODO |
49 | * - specify wich hook function will be used to call the core filter |
50 | */ |
51 | |
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52 | static char |
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53 | *a_file_name = NULL, |
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54 | *a_string = NULL; |
55 | |
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56 | static LttvHooks |
57 | *before_traceset, |
58 | *event_hook; |
59 | |
60 | static FILE *a_file; |
61 | |
62 | /** |
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63 | * filters the file input from user |
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64 | * @param hook_data the hook data |
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65 | * @return success/failure of operation |
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66 | */ |
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67 | void filter_analyze_file(void *hook_data) { |
68 | |
69 | g_print("textFilter::filter_analyze_file\n"); |
70 | |
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71 | LttvAttributeValue value; |
72 | |
73 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
74 | |
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75 | /* |
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76 | * User may specify filtering options through static file |
77 | * and/or command line string. From these sources, an |
78 | * option string is rebuilded and sent to the filter core |
79 | */ |
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80 | GString* a_file_content = g_string_new(""); |
81 | a_file = fopen(a_file_name, "r"); |
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82 | if(a_file == NULL) { |
83 | g_warning("file %s does not exist", a_file_name); |
84 | return; |
85 | } |
86 | |
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87 | char* line = NULL; |
88 | size_t len = 0; |
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89 | |
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90 | while(!feof(a_file)) { |
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91 | len = getline(&line,&len,a_file); |
92 | g_string_append(a_file_content,line); |
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93 | } |
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94 | free(line); |
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95 | |
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96 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
97 | LTTV_POINTER, &value)); |
98 | |
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99 | if(((GString*)*(value.v_pointer))->len != 0) g_string_append_c((GString*)*(value.v_pointer),'&'); |
100 | g_string_append((GString*)*(value.v_pointer),a_file_content->str); |
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101 | |
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102 | fclose(a_file); |
103 | } |
104 | |
105 | /** |
106 | * filters the string input from user |
107 | * @param hook_data the hook data |
108 | * @return success/failure of operation |
109 | */ |
110 | void filter_analyze_string(void *hook_data) { |
111 | |
112 | g_print("textFilter::filter_analyze_string\n"); |
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113 | |
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114 | LttvAttributeValue value; |
115 | |
116 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
117 | |
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118 | /* |
119 | * User may specify filtering options through static file |
120 | * and/or command line string. From these sources, an |
121 | * option string is rebuilded and sent to the filter core |
122 | */ |
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123 | /* if(a_filter_string==NULL) { |
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124 | a_filter_string = g_string_new(""); |
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125 | g_string_append(a_filter_string,a_string); |
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126 | } |
127 | else { |
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128 | g_string_append(a_filter_string,"&"); |
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129 | g_string_append(a_filter_string,a_string); |
130 | } |
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131 | */ |
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132 | |
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133 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
134 | LTTV_POINTER, &value)); |
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135 | |
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136 | if(((GString*)*(value.v_pointer))->len != 0) g_string_append_c((GString*)*(value.v_pointer),'&'); |
137 | g_string_append((GString*)*(value.v_pointer),a_string); |
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138 | |
139 | LttvFilter* filter = lttv_filter_new(); |
140 | lttv_filter_append_expression(filter,a_string); |
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141 | } |
142 | |
143 | /** |
144 | * initialize the new module |
145 | */ |
146 | static void init() { |
147 | |
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148 | g_print("textFilter::init()\n"); /* debug */ |
149 | |
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150 | LttvAttributeValue value; |
151 | |
152 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
153 | |
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154 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
155 | LTTV_POINTER, &value)); |
156 | |
157 | *(value.v_pointer) = g_string_new(""); |
158 | |
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159 | g_info("Init textFilter.c"); |
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160 | |
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161 | a_string = NULL; |
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162 | lttv_option_add("expression", 'e', |
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163 | "filters a string issued by the user on the command line", |
164 | "string", |
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165 | LTTV_OPT_STRING, &a_string, filter_analyze_string, NULL); |
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166 | // add function to call for option |
167 | |
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168 | a_file_name = NULL; |
169 | lttv_option_add("filename", 'f', |
170 | "browse the filter options contained in specified file", |
171 | "file name", |
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172 | LTTV_OPT_STRING, &a_file_name, filter_analyze_file, NULL); |
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173 | |
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174 | } |
175 | |
176 | /** |
177 | * Destroy the current module |
178 | */ |
179 | static void destroy() { |
180 | g_info("Destroy textFilter"); |
181 | |
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182 | lttv_option_remove("expression"); |
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183 | |
184 | lttv_option_remove("filename"); |
185 | |
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186 | LttvAttributeValue value; |
187 | |
188 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
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189 | |
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190 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
191 | LTTV_POINTER, &value)); |
192 | |
193 | g_string_free((GString*)*(value.v_pointer),TRUE); |
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194 | |
195 | } |
196 | |
197 | |
198 | LTTV_MODULE("textFilter", "Filters traces", \ |
199 | "Filter the trace following commands issued by user input", \ |
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200 | init, destroy, "option") |
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201 | |